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.h> 83 #include <linux/power_supply.h> 84 #include <sound/core.h> 85 #include <sound/control.h> 86 #include <sound/initval.h> 87 #include <linux/uaccess.h> 88 #include <acpi/battery.h> 89 #include <acpi/video.h> 90 91 /* ThinkPad CMOS commands */ 92 #define TP_CMOS_VOLUME_DOWN 0 93 #define TP_CMOS_VOLUME_UP 1 94 #define TP_CMOS_VOLUME_MUTE 2 95 #define TP_CMOS_BRIGHTNESS_UP 4 96 #define TP_CMOS_BRIGHTNESS_DOWN 5 97 #define TP_CMOS_THINKLIGHT_ON 12 98 #define TP_CMOS_THINKLIGHT_OFF 13 99 100 /* NVRAM Addresses */ 101 enum tp_nvram_addr { 102 TP_NVRAM_ADDR_HK2 = 0x57, 103 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 104 TP_NVRAM_ADDR_VIDEO = 0x59, 105 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 106 TP_NVRAM_ADDR_MIXER = 0x60, 107 }; 108 109 /* NVRAM bit masks */ 110 enum { 111 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 112 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 113 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 114 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 115 TP_NVRAM_MASK_THINKLIGHT = 0x10, 116 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 117 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 118 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 119 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 120 TP_NVRAM_MASK_MUTE = 0x40, 121 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 122 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 123 TP_NVRAM_POS_LEVEL_VOLUME = 0, 124 }; 125 126 /* Misc NVRAM-related */ 127 enum { 128 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 129 }; 130 131 /* ACPI HIDs */ 132 #define TPACPI_ACPI_IBM_HKEY_HID "IBM0068" 133 #define TPACPI_ACPI_LENOVO_HKEY_HID "LEN0068" 134 #define TPACPI_ACPI_LENOVO_HKEY_V2_HID "LEN0268" 135 #define TPACPI_ACPI_EC_HID "PNP0C09" 136 137 /* Input IDs */ 138 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 139 #define TPACPI_HKEY_INPUT_VERSION 0x4101 140 141 /* ACPI \WGSV commands */ 142 enum { 143 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 144 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 145 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 146 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 147 }; 148 149 /* TP_ACPI_WGSV_GET_STATE bits */ 150 enum { 151 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 152 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 153 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 154 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 155 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 156 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 157 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 158 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 159 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 160 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 161 }; 162 163 /* HKEY events */ 164 enum tpacpi_hkey_event_t { 165 /* Hotkey-related */ 166 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 167 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 168 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 169 TP_HKEY_EV_KBD_LIGHT = 0x1012, /* Thinklight/kbd backlight */ 170 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 171 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 172 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 173 174 /* Reasons for waking up from S3/S4 */ 175 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 176 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 177 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 178 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 179 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 180 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 181 182 /* Auto-sleep after eject request */ 183 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 184 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 185 186 /* Misc bay events */ 187 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 188 TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock 189 or port replicator */ 190 TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug 191 dock or port replicator */ 192 193 /* User-interface events */ 194 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 195 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 196 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 197 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 198 TP_HKEY_EV_TABLET_CHANGED = 0x60c0, /* X1 Yoga (2016): 199 * enter/leave tablet mode 200 */ 201 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 202 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 203 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 204 205 /* Key-related user-interface events */ 206 TP_HKEY_EV_KEY_NUMLOCK = 0x6000, /* NumLock key pressed */ 207 TP_HKEY_EV_KEY_FN = 0x6005, /* Fn key pressed? E420 */ 208 TP_HKEY_EV_KEY_FN_ESC = 0x6060, /* Fn+Esc key pressed X240 */ 209 210 /* Thermal events */ 211 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 212 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 213 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 214 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 215 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* windows; thermal table changed */ 216 TP_HKEY_EV_THM_CSM_COMPLETED = 0x6032, /* windows; thermal control set 217 * command completed. Related to 218 * AML DYTC */ 219 TP_HKEY_EV_THM_TRANSFM_CHANGED = 0x60F0, /* windows; thermal transformation 220 * changed. Related to AML GMTS */ 221 222 /* AC-related events */ 223 TP_HKEY_EV_AC_CHANGED = 0x6040, /* AC status changed */ 224 225 /* Further user-interface events */ 226 TP_HKEY_EV_PALM_DETECTED = 0x60b0, /* palm hoveres keyboard */ 227 TP_HKEY_EV_PALM_UNDETECTED = 0x60b1, /* palm removed */ 228 229 /* Misc */ 230 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 231 }; 232 233 /**************************************************************************** 234 * Main driver 235 */ 236 237 #define TPACPI_NAME "thinkpad" 238 #define TPACPI_DESC "ThinkPad ACPI Extras" 239 #define TPACPI_FILE TPACPI_NAME "_acpi" 240 #define TPACPI_URL "http://ibm-acpi.sf.net/" 241 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 242 243 #define TPACPI_PROC_DIR "ibm" 244 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 245 #define TPACPI_DRVR_NAME TPACPI_FILE 246 #define TPACPI_DRVR_SHORTNAME "tpacpi" 247 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 248 249 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 250 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 251 252 #define TPACPI_MAX_ACPI_ARGS 3 253 254 /* Debugging printk groups */ 255 #define TPACPI_DBG_ALL 0xffff 256 #define TPACPI_DBG_DISCLOSETASK 0x8000 257 #define TPACPI_DBG_INIT 0x0001 258 #define TPACPI_DBG_EXIT 0x0002 259 #define TPACPI_DBG_RFKILL 0x0004 260 #define TPACPI_DBG_HKEY 0x0008 261 #define TPACPI_DBG_FAN 0x0010 262 #define TPACPI_DBG_BRGHT 0x0020 263 #define TPACPI_DBG_MIXER 0x0040 264 265 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 266 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 267 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 268 269 270 /**************************************************************************** 271 * Driver-wide structs and misc. variables 272 */ 273 274 struct ibm_struct; 275 276 struct tp_acpi_drv_struct { 277 const struct acpi_device_id *hid; 278 struct acpi_driver *driver; 279 280 void (*notify) (struct ibm_struct *, u32); 281 acpi_handle *handle; 282 u32 type; 283 struct acpi_device *device; 284 }; 285 286 struct ibm_struct { 287 char *name; 288 289 int (*read) (struct seq_file *); 290 int (*write) (char *); 291 void (*exit) (void); 292 void (*resume) (void); 293 void (*suspend) (void); 294 void (*shutdown) (void); 295 296 struct list_head all_drivers; 297 298 struct tp_acpi_drv_struct *acpi; 299 300 struct { 301 u8 acpi_driver_registered:1; 302 u8 acpi_notify_installed:1; 303 u8 proc_created:1; 304 u8 init_called:1; 305 u8 experimental:1; 306 } flags; 307 }; 308 309 struct ibm_init_struct { 310 char param[32]; 311 312 int (*init) (struct ibm_init_struct *); 313 umode_t base_procfs_mode; 314 struct ibm_struct *data; 315 }; 316 317 static struct { 318 u32 bluetooth:1; 319 u32 hotkey:1; 320 u32 hotkey_mask:1; 321 u32 hotkey_wlsw:1; 322 enum { 323 TP_HOTKEY_TABLET_NONE = 0, 324 TP_HOTKEY_TABLET_USES_MHKG, 325 TP_HOTKEY_TABLET_USES_GMMS, 326 } hotkey_tablet; 327 u32 kbdlight:1; 328 u32 light:1; 329 u32 light_status:1; 330 u32 bright_acpimode:1; 331 u32 bright_unkfw:1; 332 u32 wan:1; 333 u32 uwb:1; 334 u32 fan_ctrl_status_undef:1; 335 u32 second_fan:1; 336 u32 beep_needs_two_args:1; 337 u32 mixer_no_level_control:1; 338 u32 battery_force_primary:1; 339 u32 input_device_registered:1; 340 u32 platform_drv_registered:1; 341 u32 platform_drv_attrs_registered:1; 342 u32 sensors_pdrv_registered:1; 343 u32 sensors_pdrv_attrs_registered:1; 344 u32 sensors_pdev_attrs_registered:1; 345 u32 hotkey_poll_active:1; 346 u32 has_adaptive_kbd:1; 347 } tp_features; 348 349 static struct { 350 u16 hotkey_mask_ff:1; 351 u16 volume_ctrl_forbidden:1; 352 } tp_warned; 353 354 struct thinkpad_id_data { 355 unsigned int vendor; /* ThinkPad vendor: 356 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 357 358 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 359 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 360 361 u32 bios_model; /* 1Y = 0x3159, 0 = unknown */ 362 u32 ec_model; 363 u16 bios_release; /* 1ZETK1WW = 0x4b31, 0 = unknown */ 364 u16 ec_release; 365 366 char *model_str; /* ThinkPad T43 */ 367 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 368 }; 369 static struct thinkpad_id_data thinkpad_id; 370 371 static enum { 372 TPACPI_LIFE_INIT = 0, 373 TPACPI_LIFE_RUNNING, 374 TPACPI_LIFE_EXITING, 375 } tpacpi_lifecycle; 376 377 static int experimental; 378 static u32 dbg_level; 379 380 static struct workqueue_struct *tpacpi_wq; 381 382 enum led_status_t { 383 TPACPI_LED_OFF = 0, 384 TPACPI_LED_ON, 385 TPACPI_LED_BLINK, 386 }; 387 388 /* tpacpi LED class */ 389 struct tpacpi_led_classdev { 390 struct led_classdev led_classdev; 391 int led; 392 }; 393 394 /* brightness level capabilities */ 395 static unsigned int bright_maxlvl; /* 0 = unknown */ 396 397 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 398 static int dbg_wlswemul; 399 static bool tpacpi_wlsw_emulstate; 400 static int dbg_bluetoothemul; 401 static bool tpacpi_bluetooth_emulstate; 402 static int dbg_wwanemul; 403 static bool tpacpi_wwan_emulstate; 404 static int dbg_uwbemul; 405 static bool tpacpi_uwb_emulstate; 406 #endif 407 408 409 /************************************************************************* 410 * Debugging helpers 411 */ 412 413 #define dbg_printk(a_dbg_level, format, arg...) \ 414 do { \ 415 if (dbg_level & (a_dbg_level)) \ 416 printk(KERN_DEBUG pr_fmt("%s: " format), \ 417 __func__, ##arg); \ 418 } while (0) 419 420 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 421 #define vdbg_printk dbg_printk 422 static const char *str_supported(int is_supported); 423 #else 424 static inline const char *str_supported(int is_supported) { return ""; } 425 #define vdbg_printk(a_dbg_level, format, arg...) \ 426 do { if (0) no_printk(format, ##arg); } while (0) 427 #endif 428 429 static void tpacpi_log_usertask(const char * const what) 430 { 431 printk(KERN_DEBUG pr_fmt("%s: access by process with PID %d\n"), 432 what, task_tgid_vnr(current)); 433 } 434 435 #define tpacpi_disclose_usertask(what, format, arg...) \ 436 do { \ 437 if (unlikely((dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 438 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 439 printk(KERN_DEBUG pr_fmt("%s: PID %d: " format), \ 440 what, task_tgid_vnr(current), ## arg); \ 441 } \ 442 } while (0) 443 444 /* 445 * Quirk handling helpers 446 * 447 * ThinkPad IDs and versions seen in the field so far are 448 * two or three characters from the set [0-9A-Z], i.e. base 36. 449 * 450 * We use values well outside that range as specials. 451 */ 452 453 #define TPACPI_MATCH_ANY 0xffffffffU 454 #define TPACPI_MATCH_ANY_VERSION 0xffffU 455 #define TPACPI_MATCH_UNKNOWN 0U 456 457 /* TPID('1', 'Y') == 0x3159 */ 458 #define TPID(__c1, __c2) (((__c1) << 8) | (__c2)) 459 #define TPID3(__c1, __c2, __c3) (((__c1) << 16) | ((__c2) << 8) | (__c3)) 460 #define TPVER TPID 461 462 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 463 { .vendor = PCI_VENDOR_ID_IBM, \ 464 .bios = TPID(__id1, __id2), \ 465 .ec = TPACPI_MATCH_ANY, \ 466 .quirks = (__quirk) } 467 468 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 469 { .vendor = PCI_VENDOR_ID_LENOVO, \ 470 .bios = TPID(__id1, __id2), \ 471 .ec = TPACPI_MATCH_ANY, \ 472 .quirks = (__quirk) } 473 474 #define TPACPI_Q_LNV3(__id1, __id2, __id3, __quirk) \ 475 { .vendor = PCI_VENDOR_ID_LENOVO, \ 476 .bios = TPID3(__id1, __id2, __id3), \ 477 .ec = TPACPI_MATCH_ANY, \ 478 .quirks = (__quirk) } 479 480 #define TPACPI_QEC_IBM(__id1, __id2, __quirk) \ 481 { .vendor = PCI_VENDOR_ID_IBM, \ 482 .bios = TPACPI_MATCH_ANY, \ 483 .ec = TPID(__id1, __id2), \ 484 .quirks = (__quirk) } 485 486 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 487 { .vendor = PCI_VENDOR_ID_LENOVO, \ 488 .bios = TPACPI_MATCH_ANY, \ 489 .ec = TPID(__id1, __id2), \ 490 .quirks = (__quirk) } 491 492 struct tpacpi_quirk { 493 unsigned int vendor; 494 u32 bios; 495 u32 ec; 496 unsigned long quirks; 497 }; 498 499 /** 500 * tpacpi_check_quirks() - search BIOS/EC version on a list 501 * @qlist: array of &struct tpacpi_quirk 502 * @qlist_size: number of elements in @qlist 503 * 504 * Iterates over a quirks list until one is found that matches the 505 * ThinkPad's vendor, BIOS and EC model. 506 * 507 * Returns 0 if nothing matches, otherwise returns the quirks field of 508 * the matching &struct tpacpi_quirk entry. 509 * 510 * The match criteria is: vendor, ec and bios much match. 511 */ 512 static unsigned long __init tpacpi_check_quirks( 513 const struct tpacpi_quirk *qlist, 514 unsigned int qlist_size) 515 { 516 while (qlist_size) { 517 if ((qlist->vendor == thinkpad_id.vendor || 518 qlist->vendor == TPACPI_MATCH_ANY) && 519 (qlist->bios == thinkpad_id.bios_model || 520 qlist->bios == TPACPI_MATCH_ANY) && 521 (qlist->ec == thinkpad_id.ec_model || 522 qlist->ec == TPACPI_MATCH_ANY)) 523 return qlist->quirks; 524 525 qlist_size--; 526 qlist++; 527 } 528 return 0; 529 } 530 531 static inline bool __pure __init tpacpi_is_lenovo(void) 532 { 533 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 534 } 535 536 static inline bool __pure __init tpacpi_is_ibm(void) 537 { 538 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 539 } 540 541 /**************************************************************************** 542 **************************************************************************** 543 * 544 * ACPI Helpers and device model 545 * 546 **************************************************************************** 547 ****************************************************************************/ 548 549 /************************************************************************* 550 * ACPI basic handles 551 */ 552 553 static acpi_handle root_handle; 554 static acpi_handle ec_handle; 555 556 #define TPACPI_HANDLE(object, parent, paths...) \ 557 static acpi_handle object##_handle; \ 558 static const acpi_handle * const object##_parent __initconst = \ 559 &parent##_handle; \ 560 static char *object##_paths[] __initdata = { paths } 561 562 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 563 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 564 565 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 566 /* T4x, X31, X40 */ 567 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 568 "\\CMS", /* R40, R40e */ 569 ); /* all others */ 570 571 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 572 "^HKEY", /* R30, R31 */ 573 "HKEY", /* all others */ 574 ); /* 570 */ 575 576 /************************************************************************* 577 * ACPI helpers 578 */ 579 580 static int acpi_evalf(acpi_handle handle, 581 int *res, char *method, char *fmt, ...) 582 { 583 char *fmt0 = fmt; 584 struct acpi_object_list params; 585 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 586 struct acpi_buffer result, *resultp; 587 union acpi_object out_obj; 588 acpi_status status; 589 va_list ap; 590 char res_type; 591 int success; 592 int quiet; 593 594 if (!*fmt) { 595 pr_err("acpi_evalf() called with empty format\n"); 596 return 0; 597 } 598 599 if (*fmt == 'q') { 600 quiet = 1; 601 fmt++; 602 } else 603 quiet = 0; 604 605 res_type = *(fmt++); 606 607 params.count = 0; 608 params.pointer = &in_objs[0]; 609 610 va_start(ap, fmt); 611 while (*fmt) { 612 char c = *(fmt++); 613 switch (c) { 614 case 'd': /* int */ 615 in_objs[params.count].integer.value = va_arg(ap, int); 616 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 617 break; 618 /* add more types as needed */ 619 default: 620 pr_err("acpi_evalf() called with invalid format character '%c'\n", 621 c); 622 va_end(ap); 623 return 0; 624 } 625 } 626 va_end(ap); 627 628 if (res_type != 'v') { 629 result.length = sizeof(out_obj); 630 result.pointer = &out_obj; 631 resultp = &result; 632 } else 633 resultp = NULL; 634 635 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 636 637 switch (res_type) { 638 case 'd': /* int */ 639 success = (status == AE_OK && 640 out_obj.type == ACPI_TYPE_INTEGER); 641 if (success && res) 642 *res = out_obj.integer.value; 643 break; 644 case 'v': /* void */ 645 success = status == AE_OK; 646 break; 647 /* add more types as needed */ 648 default: 649 pr_err("acpi_evalf() called with invalid format character '%c'\n", 650 res_type); 651 return 0; 652 } 653 654 if (!success && !quiet) 655 pr_err("acpi_evalf(%s, %s, ...) failed: %s\n", 656 method, fmt0, acpi_format_exception(status)); 657 658 return success; 659 } 660 661 static int acpi_ec_read(int i, u8 *p) 662 { 663 int v; 664 665 if (ecrd_handle) { 666 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 667 return 0; 668 *p = v; 669 } else { 670 if (ec_read(i, p) < 0) 671 return 0; 672 } 673 674 return 1; 675 } 676 677 static int acpi_ec_write(int i, u8 v) 678 { 679 if (ecwr_handle) { 680 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 681 return 0; 682 } else { 683 if (ec_write(i, v) < 0) 684 return 0; 685 } 686 687 return 1; 688 } 689 690 static int issue_thinkpad_cmos_command(int cmos_cmd) 691 { 692 if (!cmos_handle) 693 return -ENXIO; 694 695 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 696 return -EIO; 697 698 return 0; 699 } 700 701 /************************************************************************* 702 * ACPI device model 703 */ 704 705 #define TPACPI_ACPIHANDLE_INIT(object) \ 706 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 707 object##_paths, ARRAY_SIZE(object##_paths)) 708 709 static void __init drv_acpi_handle_init(const char *name, 710 acpi_handle *handle, const acpi_handle parent, 711 char **paths, const int num_paths) 712 { 713 int i; 714 acpi_status status; 715 716 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 717 name); 718 719 for (i = 0; i < num_paths; i++) { 720 status = acpi_get_handle(parent, paths[i], handle); 721 if (ACPI_SUCCESS(status)) { 722 dbg_printk(TPACPI_DBG_INIT, 723 "Found ACPI handle %s for %s\n", 724 paths[i], name); 725 return; 726 } 727 } 728 729 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 730 name); 731 *handle = NULL; 732 } 733 734 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 735 u32 level, void *context, void **return_value) 736 { 737 struct acpi_device *dev; 738 if (!strcmp(context, "video")) { 739 if (acpi_bus_get_device(handle, &dev)) 740 return AE_OK; 741 if (strcmp(ACPI_VIDEO_HID, acpi_device_hid(dev))) 742 return AE_OK; 743 } 744 745 *(acpi_handle *)return_value = handle; 746 747 return AE_CTRL_TERMINATE; 748 } 749 750 static void __init tpacpi_acpi_handle_locate(const char *name, 751 const char *hid, 752 acpi_handle *handle) 753 { 754 acpi_status status; 755 acpi_handle device_found; 756 757 BUG_ON(!name || !handle); 758 vdbg_printk(TPACPI_DBG_INIT, 759 "trying to locate ACPI handle for %s, using HID %s\n", 760 name, hid ? hid : "NULL"); 761 762 memset(&device_found, 0, sizeof(device_found)); 763 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 764 (void *)name, &device_found); 765 766 *handle = NULL; 767 768 if (ACPI_SUCCESS(status)) { 769 *handle = device_found; 770 dbg_printk(TPACPI_DBG_INIT, 771 "Found ACPI handle for %s\n", name); 772 } else { 773 vdbg_printk(TPACPI_DBG_INIT, 774 "Could not locate an ACPI handle for %s: %s\n", 775 name, acpi_format_exception(status)); 776 } 777 } 778 779 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 780 { 781 struct ibm_struct *ibm = data; 782 783 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 784 return; 785 786 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 787 return; 788 789 ibm->acpi->notify(ibm, event); 790 } 791 792 static int __init setup_acpi_notify(struct ibm_struct *ibm) 793 { 794 acpi_status status; 795 int rc; 796 797 BUG_ON(!ibm->acpi); 798 799 if (!*ibm->acpi->handle) 800 return 0; 801 802 vdbg_printk(TPACPI_DBG_INIT, 803 "setting up ACPI notify for %s\n", ibm->name); 804 805 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 806 if (rc < 0) { 807 pr_err("acpi_bus_get_device(%s) failed: %d\n", ibm->name, rc); 808 return -ENODEV; 809 } 810 811 ibm->acpi->device->driver_data = ibm; 812 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 813 TPACPI_ACPI_EVENT_PREFIX, 814 ibm->name); 815 816 status = acpi_install_notify_handler(*ibm->acpi->handle, 817 ibm->acpi->type, dispatch_acpi_notify, ibm); 818 if (ACPI_FAILURE(status)) { 819 if (status == AE_ALREADY_EXISTS) { 820 pr_notice("another device driver is already handling %s events\n", 821 ibm->name); 822 } else { 823 pr_err("acpi_install_notify_handler(%s) failed: %s\n", 824 ibm->name, acpi_format_exception(status)); 825 } 826 return -ENODEV; 827 } 828 ibm->flags.acpi_notify_installed = 1; 829 return 0; 830 } 831 832 static int __init tpacpi_device_add(struct acpi_device *device) 833 { 834 return 0; 835 } 836 837 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 838 { 839 int rc; 840 841 dbg_printk(TPACPI_DBG_INIT, 842 "registering %s as an ACPI driver\n", ibm->name); 843 844 BUG_ON(!ibm->acpi); 845 846 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 847 if (!ibm->acpi->driver) { 848 pr_err("failed to allocate memory for ibm->acpi->driver\n"); 849 return -ENOMEM; 850 } 851 852 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 853 ibm->acpi->driver->ids = ibm->acpi->hid; 854 855 ibm->acpi->driver->ops.add = &tpacpi_device_add; 856 857 rc = acpi_bus_register_driver(ibm->acpi->driver); 858 if (rc < 0) { 859 pr_err("acpi_bus_register_driver(%s) failed: %d\n", 860 ibm->name, rc); 861 kfree(ibm->acpi->driver); 862 ibm->acpi->driver = NULL; 863 } else if (!rc) 864 ibm->flags.acpi_driver_registered = 1; 865 866 return rc; 867 } 868 869 870 /**************************************************************************** 871 **************************************************************************** 872 * 873 * Procfs Helpers 874 * 875 **************************************************************************** 876 ****************************************************************************/ 877 878 static int dispatch_proc_show(struct seq_file *m, void *v) 879 { 880 struct ibm_struct *ibm = m->private; 881 882 if (!ibm || !ibm->read) 883 return -EINVAL; 884 return ibm->read(m); 885 } 886 887 static int dispatch_proc_open(struct inode *inode, struct file *file) 888 { 889 return single_open(file, dispatch_proc_show, PDE_DATA(inode)); 890 } 891 892 static ssize_t dispatch_proc_write(struct file *file, 893 const char __user *userbuf, 894 size_t count, loff_t *pos) 895 { 896 struct ibm_struct *ibm = PDE_DATA(file_inode(file)); 897 char *kernbuf; 898 int ret; 899 900 if (!ibm || !ibm->write) 901 return -EINVAL; 902 if (count > PAGE_SIZE - 2) 903 return -EINVAL; 904 905 kernbuf = kmalloc(count + 2, GFP_KERNEL); 906 if (!kernbuf) 907 return -ENOMEM; 908 909 if (copy_from_user(kernbuf, userbuf, count)) { 910 kfree(kernbuf); 911 return -EFAULT; 912 } 913 914 kernbuf[count] = 0; 915 strcat(kernbuf, ","); 916 ret = ibm->write(kernbuf); 917 if (ret == 0) 918 ret = count; 919 920 kfree(kernbuf); 921 922 return ret; 923 } 924 925 static const struct file_operations dispatch_proc_fops = { 926 .owner = THIS_MODULE, 927 .open = dispatch_proc_open, 928 .read = seq_read, 929 .llseek = seq_lseek, 930 .release = single_release, 931 .write = dispatch_proc_write, 932 }; 933 934 static char *next_cmd(char **cmds) 935 { 936 char *start = *cmds; 937 char *end; 938 939 while ((end = strchr(start, ',')) && end == start) 940 start = end + 1; 941 942 if (!end) 943 return NULL; 944 945 *end = 0; 946 *cmds = end + 1; 947 return start; 948 } 949 950 951 /**************************************************************************** 952 **************************************************************************** 953 * 954 * Device model: input, hwmon and platform 955 * 956 **************************************************************************** 957 ****************************************************************************/ 958 959 static struct platform_device *tpacpi_pdev; 960 static struct platform_device *tpacpi_sensors_pdev; 961 static struct device *tpacpi_hwmon; 962 static struct input_dev *tpacpi_inputdev; 963 static struct mutex tpacpi_inputdev_send_mutex; 964 static LIST_HEAD(tpacpi_all_drivers); 965 966 #ifdef CONFIG_PM_SLEEP 967 static int tpacpi_suspend_handler(struct device *dev) 968 { 969 struct ibm_struct *ibm, *itmp; 970 971 list_for_each_entry_safe(ibm, itmp, 972 &tpacpi_all_drivers, 973 all_drivers) { 974 if (ibm->suspend) 975 (ibm->suspend)(); 976 } 977 978 return 0; 979 } 980 981 static int tpacpi_resume_handler(struct device *dev) 982 { 983 struct ibm_struct *ibm, *itmp; 984 985 list_for_each_entry_safe(ibm, itmp, 986 &tpacpi_all_drivers, 987 all_drivers) { 988 if (ibm->resume) 989 (ibm->resume)(); 990 } 991 992 return 0; 993 } 994 #endif 995 996 static SIMPLE_DEV_PM_OPS(tpacpi_pm, 997 tpacpi_suspend_handler, tpacpi_resume_handler); 998 999 static void tpacpi_shutdown_handler(struct platform_device *pdev) 1000 { 1001 struct ibm_struct *ibm, *itmp; 1002 1003 list_for_each_entry_safe(ibm, itmp, 1004 &tpacpi_all_drivers, 1005 all_drivers) { 1006 if (ibm->shutdown) 1007 (ibm->shutdown)(); 1008 } 1009 } 1010 1011 static struct platform_driver tpacpi_pdriver = { 1012 .driver = { 1013 .name = TPACPI_DRVR_NAME, 1014 .pm = &tpacpi_pm, 1015 }, 1016 .shutdown = tpacpi_shutdown_handler, 1017 }; 1018 1019 static struct platform_driver tpacpi_hwmon_pdriver = { 1020 .driver = { 1021 .name = TPACPI_HWMON_DRVR_NAME, 1022 }, 1023 }; 1024 1025 /************************************************************************* 1026 * sysfs support helpers 1027 */ 1028 1029 struct attribute_set { 1030 unsigned int members, max_members; 1031 struct attribute_group group; 1032 }; 1033 1034 struct attribute_set_obj { 1035 struct attribute_set s; 1036 struct attribute *a; 1037 } __attribute__((packed)); 1038 1039 static struct attribute_set *create_attr_set(unsigned int max_members, 1040 const char *name) 1041 { 1042 struct attribute_set_obj *sobj; 1043 1044 if (max_members == 0) 1045 return NULL; 1046 1047 /* Allocates space for implicit NULL at the end too */ 1048 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1049 max_members * sizeof(struct attribute *), 1050 GFP_KERNEL); 1051 if (!sobj) 1052 return NULL; 1053 sobj->s.max_members = max_members; 1054 sobj->s.group.attrs = &sobj->a; 1055 sobj->s.group.name = name; 1056 1057 return &sobj->s; 1058 } 1059 1060 #define destroy_attr_set(_set) \ 1061 kfree(_set); 1062 1063 /* not multi-threaded safe, use it in a single thread per set */ 1064 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1065 { 1066 if (!s || !attr) 1067 return -EINVAL; 1068 1069 if (s->members >= s->max_members) 1070 return -ENOMEM; 1071 1072 s->group.attrs[s->members] = attr; 1073 s->members++; 1074 1075 return 0; 1076 } 1077 1078 static int add_many_to_attr_set(struct attribute_set *s, 1079 struct attribute **attr, 1080 unsigned int count) 1081 { 1082 int i, res; 1083 1084 for (i = 0; i < count; i++) { 1085 res = add_to_attr_set(s, attr[i]); 1086 if (res) 1087 return res; 1088 } 1089 1090 return 0; 1091 } 1092 1093 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1094 { 1095 sysfs_remove_group(kobj, &s->group); 1096 destroy_attr_set(s); 1097 } 1098 1099 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1100 sysfs_create_group(_kobj, &_attr_set->group) 1101 1102 static int parse_strtoul(const char *buf, 1103 unsigned long max, unsigned long *value) 1104 { 1105 char *endp; 1106 1107 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1108 endp = skip_spaces(endp); 1109 if (*endp || *value > max) 1110 return -EINVAL; 1111 1112 return 0; 1113 } 1114 1115 static void tpacpi_disable_brightness_delay(void) 1116 { 1117 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1118 pr_notice("ACPI backlight control delay disabled\n"); 1119 } 1120 1121 static void printk_deprecated_attribute(const char * const what, 1122 const char * const details) 1123 { 1124 tpacpi_log_usertask("deprecated sysfs attribute"); 1125 pr_warn("WARNING: sysfs attribute %s is deprecated and will be removed. %s\n", 1126 what, details); 1127 } 1128 1129 /************************************************************************* 1130 * rfkill and radio control support helpers 1131 */ 1132 1133 /* 1134 * ThinkPad-ACPI firmware handling model: 1135 * 1136 * WLSW (master wireless switch) is event-driven, and is common to all 1137 * firmware-controlled radios. It cannot be controlled, just monitored, 1138 * as expected. It overrides all radio state in firmware 1139 * 1140 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1141 * (TODO: verify how WLSW interacts with the returned radio state). 1142 * 1143 * The only time there are shadow radio state changes, is when 1144 * masked-off hotkeys are used. 1145 */ 1146 1147 /* 1148 * Internal driver API for radio state: 1149 * 1150 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1151 * bool: true means radio blocked (off) 1152 */ 1153 enum tpacpi_rfkill_state { 1154 TPACPI_RFK_RADIO_OFF = 0, 1155 TPACPI_RFK_RADIO_ON 1156 }; 1157 1158 /* rfkill switches */ 1159 enum tpacpi_rfk_id { 1160 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1161 TPACPI_RFK_WWAN_SW_ID, 1162 TPACPI_RFK_UWB_SW_ID, 1163 TPACPI_RFK_SW_MAX 1164 }; 1165 1166 static const char *tpacpi_rfkill_names[] = { 1167 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1168 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1169 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1170 [TPACPI_RFK_SW_MAX] = NULL 1171 }; 1172 1173 /* ThinkPad-ACPI rfkill subdriver */ 1174 struct tpacpi_rfk { 1175 struct rfkill *rfkill; 1176 enum tpacpi_rfk_id id; 1177 const struct tpacpi_rfk_ops *ops; 1178 }; 1179 1180 struct tpacpi_rfk_ops { 1181 /* firmware interface */ 1182 int (*get_status)(void); 1183 int (*set_status)(const enum tpacpi_rfkill_state); 1184 }; 1185 1186 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1187 1188 /* Query FW and update rfkill sw state for a given rfkill switch */ 1189 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1190 { 1191 int status; 1192 1193 if (!tp_rfk) 1194 return -ENODEV; 1195 1196 status = (tp_rfk->ops->get_status)(); 1197 if (status < 0) 1198 return status; 1199 1200 rfkill_set_sw_state(tp_rfk->rfkill, 1201 (status == TPACPI_RFK_RADIO_OFF)); 1202 1203 return status; 1204 } 1205 1206 /* Query FW and update rfkill sw state for all rfkill switches */ 1207 static void tpacpi_rfk_update_swstate_all(void) 1208 { 1209 unsigned int i; 1210 1211 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1212 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1213 } 1214 1215 /* 1216 * Sync the HW-blocking state of all rfkill switches, 1217 * do notice it causes the rfkill core to schedule uevents 1218 */ 1219 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1220 { 1221 unsigned int i; 1222 struct tpacpi_rfk *tp_rfk; 1223 1224 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1225 tp_rfk = tpacpi_rfkill_switches[i]; 1226 if (tp_rfk) { 1227 if (rfkill_set_hw_state(tp_rfk->rfkill, 1228 blocked)) { 1229 /* ignore -- we track sw block */ 1230 } 1231 } 1232 } 1233 } 1234 1235 /* Call to get the WLSW state from the firmware */ 1236 static int hotkey_get_wlsw(void); 1237 1238 /* Call to query WLSW state and update all rfkill switches */ 1239 static bool tpacpi_rfk_check_hwblock_state(void) 1240 { 1241 int res = hotkey_get_wlsw(); 1242 int hw_blocked; 1243 1244 /* When unknown or unsupported, we have to assume it is unblocked */ 1245 if (res < 0) 1246 return false; 1247 1248 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1249 tpacpi_rfk_update_hwblock_state(hw_blocked); 1250 1251 return hw_blocked; 1252 } 1253 1254 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1255 { 1256 struct tpacpi_rfk *tp_rfk = data; 1257 int res; 1258 1259 dbg_printk(TPACPI_DBG_RFKILL, 1260 "request to change radio state to %s\n", 1261 blocked ? "blocked" : "unblocked"); 1262 1263 /* try to set radio state */ 1264 res = (tp_rfk->ops->set_status)(blocked ? 1265 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1266 1267 /* and update the rfkill core with whatever the FW really did */ 1268 tpacpi_rfk_update_swstate(tp_rfk); 1269 1270 return (res < 0) ? res : 0; 1271 } 1272 1273 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1274 .set_block = tpacpi_rfk_hook_set_block, 1275 }; 1276 1277 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1278 const struct tpacpi_rfk_ops *tp_rfkops, 1279 const enum rfkill_type rfktype, 1280 const char *name, 1281 const bool set_default) 1282 { 1283 struct tpacpi_rfk *atp_rfk; 1284 int res; 1285 bool sw_state = false; 1286 bool hw_state; 1287 int sw_status; 1288 1289 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1290 1291 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1292 if (atp_rfk) 1293 atp_rfk->rfkill = rfkill_alloc(name, 1294 &tpacpi_pdev->dev, 1295 rfktype, 1296 &tpacpi_rfk_rfkill_ops, 1297 atp_rfk); 1298 if (!atp_rfk || !atp_rfk->rfkill) { 1299 pr_err("failed to allocate memory for rfkill class\n"); 1300 kfree(atp_rfk); 1301 return -ENOMEM; 1302 } 1303 1304 atp_rfk->id = id; 1305 atp_rfk->ops = tp_rfkops; 1306 1307 sw_status = (tp_rfkops->get_status)(); 1308 if (sw_status < 0) { 1309 pr_err("failed to read initial state for %s, error %d\n", 1310 name, sw_status); 1311 } else { 1312 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1313 if (set_default) { 1314 /* try to keep the initial state, since we ask the 1315 * firmware to preserve it across S5 in NVRAM */ 1316 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1317 } 1318 } 1319 hw_state = tpacpi_rfk_check_hwblock_state(); 1320 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1321 1322 res = rfkill_register(atp_rfk->rfkill); 1323 if (res < 0) { 1324 pr_err("failed to register %s rfkill switch: %d\n", name, res); 1325 rfkill_destroy(atp_rfk->rfkill); 1326 kfree(atp_rfk); 1327 return res; 1328 } 1329 1330 tpacpi_rfkill_switches[id] = atp_rfk; 1331 1332 pr_info("rfkill switch %s: radio is %sblocked\n", 1333 name, (sw_state || hw_state) ? "" : "un"); 1334 return 0; 1335 } 1336 1337 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1338 { 1339 struct tpacpi_rfk *tp_rfk; 1340 1341 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1342 1343 tp_rfk = tpacpi_rfkill_switches[id]; 1344 if (tp_rfk) { 1345 rfkill_unregister(tp_rfk->rfkill); 1346 rfkill_destroy(tp_rfk->rfkill); 1347 tpacpi_rfkill_switches[id] = NULL; 1348 kfree(tp_rfk); 1349 } 1350 } 1351 1352 static void printk_deprecated_rfkill_attribute(const char * const what) 1353 { 1354 printk_deprecated_attribute(what, 1355 "Please switch to generic rfkill before year 2010"); 1356 } 1357 1358 /* sysfs <radio> enable ------------------------------------------------ */ 1359 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1360 struct device_attribute *attr, 1361 char *buf) 1362 { 1363 int status; 1364 1365 printk_deprecated_rfkill_attribute(attr->attr.name); 1366 1367 /* This is in the ABI... */ 1368 if (tpacpi_rfk_check_hwblock_state()) { 1369 status = TPACPI_RFK_RADIO_OFF; 1370 } else { 1371 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1372 if (status < 0) 1373 return status; 1374 } 1375 1376 return snprintf(buf, PAGE_SIZE, "%d\n", 1377 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1378 } 1379 1380 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1381 struct device_attribute *attr, 1382 const char *buf, size_t count) 1383 { 1384 unsigned long t; 1385 int res; 1386 1387 printk_deprecated_rfkill_attribute(attr->attr.name); 1388 1389 if (parse_strtoul(buf, 1, &t)) 1390 return -EINVAL; 1391 1392 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1393 1394 /* This is in the ABI... */ 1395 if (tpacpi_rfk_check_hwblock_state() && !!t) 1396 return -EPERM; 1397 1398 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1399 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1400 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1401 1402 return (res < 0) ? res : count; 1403 } 1404 1405 /* procfs -------------------------------------------------------------- */ 1406 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1407 { 1408 if (id >= TPACPI_RFK_SW_MAX) 1409 seq_printf(m, "status:\t\tnot supported\n"); 1410 else { 1411 int status; 1412 1413 /* This is in the ABI... */ 1414 if (tpacpi_rfk_check_hwblock_state()) { 1415 status = TPACPI_RFK_RADIO_OFF; 1416 } else { 1417 status = tpacpi_rfk_update_swstate( 1418 tpacpi_rfkill_switches[id]); 1419 if (status < 0) 1420 return status; 1421 } 1422 1423 seq_printf(m, "status:\t\t%s\n", 1424 (status == TPACPI_RFK_RADIO_ON) ? 1425 "enabled" : "disabled"); 1426 seq_printf(m, "commands:\tenable, disable\n"); 1427 } 1428 1429 return 0; 1430 } 1431 1432 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1433 { 1434 char *cmd; 1435 int status = -1; 1436 int res = 0; 1437 1438 if (id >= TPACPI_RFK_SW_MAX) 1439 return -ENODEV; 1440 1441 while ((cmd = next_cmd(&buf))) { 1442 if (strlencmp(cmd, "enable") == 0) 1443 status = TPACPI_RFK_RADIO_ON; 1444 else if (strlencmp(cmd, "disable") == 0) 1445 status = TPACPI_RFK_RADIO_OFF; 1446 else 1447 return -EINVAL; 1448 } 1449 1450 if (status != -1) { 1451 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1452 (status == TPACPI_RFK_RADIO_ON) ? 1453 "enable" : "disable", 1454 tpacpi_rfkill_names[id]); 1455 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1456 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1457 } 1458 1459 return res; 1460 } 1461 1462 /************************************************************************* 1463 * thinkpad-acpi driver attributes 1464 */ 1465 1466 /* interface_version --------------------------------------------------- */ 1467 static ssize_t interface_version_show(struct device_driver *drv, char *buf) 1468 { 1469 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1470 } 1471 static DRIVER_ATTR_RO(interface_version); 1472 1473 /* debug_level --------------------------------------------------------- */ 1474 static ssize_t debug_level_show(struct device_driver *drv, char *buf) 1475 { 1476 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1477 } 1478 1479 static ssize_t debug_level_store(struct device_driver *drv, const char *buf, 1480 size_t count) 1481 { 1482 unsigned long t; 1483 1484 if (parse_strtoul(buf, 0xffff, &t)) 1485 return -EINVAL; 1486 1487 dbg_level = t; 1488 1489 return count; 1490 } 1491 static DRIVER_ATTR_RW(debug_level); 1492 1493 /* version ------------------------------------------------------------- */ 1494 static ssize_t version_show(struct device_driver *drv, char *buf) 1495 { 1496 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1497 TPACPI_DESC, TPACPI_VERSION); 1498 } 1499 static DRIVER_ATTR_RO(version); 1500 1501 /* --------------------------------------------------------------------- */ 1502 1503 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1504 1505 /* wlsw_emulstate ------------------------------------------------------ */ 1506 static ssize_t wlsw_emulstate_show(struct device_driver *drv, char *buf) 1507 { 1508 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1509 } 1510 1511 static ssize_t wlsw_emulstate_store(struct device_driver *drv, const char *buf, 1512 size_t count) 1513 { 1514 unsigned long t; 1515 1516 if (parse_strtoul(buf, 1, &t)) 1517 return -EINVAL; 1518 1519 if (tpacpi_wlsw_emulstate != !!t) { 1520 tpacpi_wlsw_emulstate = !!t; 1521 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1522 } 1523 1524 return count; 1525 } 1526 static DRIVER_ATTR_RW(wlsw_emulstate); 1527 1528 /* bluetooth_emulstate ------------------------------------------------- */ 1529 static ssize_t bluetooth_emulstate_show(struct device_driver *drv, char *buf) 1530 { 1531 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1532 } 1533 1534 static ssize_t bluetooth_emulstate_store(struct device_driver *drv, 1535 const char *buf, size_t count) 1536 { 1537 unsigned long t; 1538 1539 if (parse_strtoul(buf, 1, &t)) 1540 return -EINVAL; 1541 1542 tpacpi_bluetooth_emulstate = !!t; 1543 1544 return count; 1545 } 1546 static DRIVER_ATTR_RW(bluetooth_emulstate); 1547 1548 /* wwan_emulstate ------------------------------------------------- */ 1549 static ssize_t wwan_emulstate_show(struct device_driver *drv, char *buf) 1550 { 1551 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1552 } 1553 1554 static ssize_t wwan_emulstate_store(struct device_driver *drv, const char *buf, 1555 size_t count) 1556 { 1557 unsigned long t; 1558 1559 if (parse_strtoul(buf, 1, &t)) 1560 return -EINVAL; 1561 1562 tpacpi_wwan_emulstate = !!t; 1563 1564 return count; 1565 } 1566 static DRIVER_ATTR_RW(wwan_emulstate); 1567 1568 /* uwb_emulstate ------------------------------------------------- */ 1569 static ssize_t uwb_emulstate_show(struct device_driver *drv, char *buf) 1570 { 1571 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1572 } 1573 1574 static ssize_t uwb_emulstate_store(struct device_driver *drv, const char *buf, 1575 size_t count) 1576 { 1577 unsigned long t; 1578 1579 if (parse_strtoul(buf, 1, &t)) 1580 return -EINVAL; 1581 1582 tpacpi_uwb_emulstate = !!t; 1583 1584 return count; 1585 } 1586 static DRIVER_ATTR_RW(uwb_emulstate); 1587 #endif 1588 1589 /* --------------------------------------------------------------------- */ 1590 1591 static struct driver_attribute *tpacpi_driver_attributes[] = { 1592 &driver_attr_debug_level, &driver_attr_version, 1593 &driver_attr_interface_version, 1594 }; 1595 1596 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1597 { 1598 int i, res; 1599 1600 i = 0; 1601 res = 0; 1602 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1603 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1604 i++; 1605 } 1606 1607 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1608 if (!res && dbg_wlswemul) 1609 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1610 if (!res && dbg_bluetoothemul) 1611 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1612 if (!res && dbg_wwanemul) 1613 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1614 if (!res && dbg_uwbemul) 1615 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1616 #endif 1617 1618 return res; 1619 } 1620 1621 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1622 { 1623 int i; 1624 1625 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1626 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1627 1628 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1629 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1630 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1631 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1632 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1633 #endif 1634 } 1635 1636 /************************************************************************* 1637 * Firmware Data 1638 */ 1639 1640 /* 1641 * Table of recommended minimum BIOS versions 1642 * 1643 * Reasons for listing: 1644 * 1. Stable BIOS, listed because the unknown amount of 1645 * bugs and bad ACPI behaviour on older versions 1646 * 1647 * 2. BIOS or EC fw with known bugs that trigger on Linux 1648 * 1649 * 3. BIOS with known reduced functionality in older versions 1650 * 1651 * We recommend the latest BIOS and EC version. 1652 * We only support the latest BIOS and EC fw version as a rule. 1653 * 1654 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1655 * Information from users in ThinkWiki 1656 * 1657 * WARNING: we use this table also to detect that the machine is 1658 * a ThinkPad in some cases, so don't remove entries lightly. 1659 */ 1660 1661 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1662 { .vendor = (__v), \ 1663 .bios = TPID(__id1, __id2), \ 1664 .ec = TPACPI_MATCH_ANY, \ 1665 .quirks = TPACPI_MATCH_ANY_VERSION << 16 \ 1666 | TPVER(__bv1, __bv2) } 1667 1668 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1669 __eid, __ev1, __ev2) \ 1670 { .vendor = (__v), \ 1671 .bios = TPID(__bid1, __bid2), \ 1672 .ec = __eid, \ 1673 .quirks = TPVER(__ev1, __ev2) << 16 \ 1674 | TPVER(__bv1, __bv2) } 1675 1676 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1677 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1678 1679 /* Outdated IBM BIOSes often lack the EC id string */ 1680 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1681 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1682 __bv1, __bv2, TPID(__id1, __id2), \ 1683 __ev1, __ev2), \ 1684 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1685 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1686 __ev1, __ev2) 1687 1688 /* Outdated IBM BIOSes often lack the EC id string */ 1689 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1690 __eid1, __eid2, __ev1, __ev2) \ 1691 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1692 __bv1, __bv2, TPID(__eid1, __eid2), \ 1693 __ev1, __ev2), \ 1694 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1695 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1696 __ev1, __ev2) 1697 1698 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1699 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1700 1701 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1702 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1703 __bv1, __bv2, TPID(__id1, __id2), \ 1704 __ev1, __ev2) 1705 1706 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1707 __eid1, __eid2, __ev1, __ev2) \ 1708 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1709 __bv1, __bv2, TPID(__eid1, __eid2), \ 1710 __ev1, __ev2) 1711 1712 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1713 /* Numeric models ------------------ */ 1714 /* FW MODEL BIOS VERS */ 1715 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1716 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1717 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1718 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1719 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1720 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1721 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1722 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1723 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1724 1725 /* A-series ------------------------- */ 1726 /* FW MODEL BIOS VERS EC VERS */ 1727 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1728 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1729 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1730 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1731 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1732 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1733 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1734 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1735 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1736 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1737 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1738 1739 /* G-series ------------------------- */ 1740 /* FW MODEL BIOS VERS */ 1741 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1742 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1743 1744 /* R-series, T-series --------------- */ 1745 /* FW MODEL BIOS VERS EC VERS */ 1746 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1747 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1748 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1749 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1750 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1751 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1752 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1753 T40/p, T41/p, T42/p (1) */ 1754 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1755 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1756 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1757 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1758 1759 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1760 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1761 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1762 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1763 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1764 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1765 1766 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1767 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1768 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1769 1770 /* BIOS FW BIOS VERS EC FW EC VERS */ 1771 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1772 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1773 1774 /* X-series ------------------------- */ 1775 /* FW MODEL BIOS VERS EC VERS */ 1776 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1777 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1778 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1779 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1780 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1781 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1782 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1783 1784 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1785 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1786 1787 /* (0) - older versions lack DMI EC fw string and functionality */ 1788 /* (1) - older versions known to lack functionality */ 1789 }; 1790 1791 #undef TPV_QL1 1792 #undef TPV_QL0 1793 #undef TPV_QI2 1794 #undef TPV_QI1 1795 #undef TPV_QI0 1796 #undef TPV_Q_X 1797 #undef TPV_Q 1798 1799 static void __init tpacpi_check_outdated_fw(void) 1800 { 1801 unsigned long fwvers; 1802 u16 ec_version, bios_version; 1803 1804 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1805 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1806 1807 if (!fwvers) 1808 return; 1809 1810 bios_version = fwvers & 0xffffU; 1811 ec_version = (fwvers >> 16) & 0xffffU; 1812 1813 /* note that unknown versions are set to 0x0000 and we use that */ 1814 if ((bios_version > thinkpad_id.bios_release) || 1815 (ec_version > thinkpad_id.ec_release && 1816 ec_version != TPACPI_MATCH_ANY_VERSION)) { 1817 /* 1818 * The changelogs would let us track down the exact 1819 * reason, but it is just too much of a pain to track 1820 * it. We only list BIOSes that are either really 1821 * broken, or really stable to begin with, so it is 1822 * best if the user upgrades the firmware anyway. 1823 */ 1824 pr_warn("WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1825 pr_warn("WARNING: This firmware may be missing critical bug fixes and/or important features\n"); 1826 } 1827 } 1828 1829 static bool __init tpacpi_is_fw_known(void) 1830 { 1831 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1832 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1833 } 1834 1835 /**************************************************************************** 1836 **************************************************************************** 1837 * 1838 * Subdrivers 1839 * 1840 **************************************************************************** 1841 ****************************************************************************/ 1842 1843 /************************************************************************* 1844 * thinkpad-acpi metadata subdriver 1845 */ 1846 1847 static int thinkpad_acpi_driver_read(struct seq_file *m) 1848 { 1849 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1850 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1851 return 0; 1852 } 1853 1854 static struct ibm_struct thinkpad_acpi_driver_data = { 1855 .name = "driver", 1856 .read = thinkpad_acpi_driver_read, 1857 }; 1858 1859 /************************************************************************* 1860 * Hotkey subdriver 1861 */ 1862 1863 /* 1864 * ThinkPad firmware event model 1865 * 1866 * The ThinkPad firmware has two main event interfaces: normal ACPI 1867 * notifications (which follow the ACPI standard), and a private event 1868 * interface. 1869 * 1870 * The private event interface also issues events for the hotkeys. As 1871 * the driver gained features, the event handling code ended up being 1872 * built around the hotkey subdriver. This will need to be refactored 1873 * to a more formal event API eventually. 1874 * 1875 * Some "hotkeys" are actually supposed to be used as event reports, 1876 * such as "brightness has changed", "volume has changed", depending on 1877 * the ThinkPad model and how the firmware is operating. 1878 * 1879 * Unlike other classes, hotkey-class events have mask/unmask control on 1880 * non-ancient firmware. However, how it behaves changes a lot with the 1881 * firmware model and version. 1882 */ 1883 1884 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1885 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1886 TP_ACPI_HOTKEYSCAN_FNF2, 1887 TP_ACPI_HOTKEYSCAN_FNF3, 1888 TP_ACPI_HOTKEYSCAN_FNF4, 1889 TP_ACPI_HOTKEYSCAN_FNF5, 1890 TP_ACPI_HOTKEYSCAN_FNF6, 1891 TP_ACPI_HOTKEYSCAN_FNF7, 1892 TP_ACPI_HOTKEYSCAN_FNF8, 1893 TP_ACPI_HOTKEYSCAN_FNF9, 1894 TP_ACPI_HOTKEYSCAN_FNF10, 1895 TP_ACPI_HOTKEYSCAN_FNF11, 1896 TP_ACPI_HOTKEYSCAN_FNF12, 1897 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1898 TP_ACPI_HOTKEYSCAN_FNINSERT, 1899 TP_ACPI_HOTKEYSCAN_FNDELETE, 1900 TP_ACPI_HOTKEYSCAN_FNHOME, 1901 TP_ACPI_HOTKEYSCAN_FNEND, 1902 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1903 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1904 TP_ACPI_HOTKEYSCAN_FNSPACE, 1905 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1906 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1907 TP_ACPI_HOTKEYSCAN_MUTE, 1908 TP_ACPI_HOTKEYSCAN_THINKPAD, 1909 TP_ACPI_HOTKEYSCAN_UNK1, 1910 TP_ACPI_HOTKEYSCAN_UNK2, 1911 TP_ACPI_HOTKEYSCAN_UNK3, 1912 TP_ACPI_HOTKEYSCAN_UNK4, 1913 TP_ACPI_HOTKEYSCAN_UNK5, 1914 TP_ACPI_HOTKEYSCAN_UNK6, 1915 TP_ACPI_HOTKEYSCAN_UNK7, 1916 TP_ACPI_HOTKEYSCAN_UNK8, 1917 1918 /* Adaptive keyboard keycodes */ 1919 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1920 TP_ACPI_HOTKEYSCAN_MUTE2 = TP_ACPI_HOTKEYSCAN_ADAPTIVE_START, 1921 TP_ACPI_HOTKEYSCAN_BRIGHTNESS_ZERO, 1922 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL, 1923 TP_ACPI_HOTKEYSCAN_CLOUD, 1924 TP_ACPI_HOTKEYSCAN_UNK9, 1925 TP_ACPI_HOTKEYSCAN_VOICE, 1926 TP_ACPI_HOTKEYSCAN_UNK10, 1927 TP_ACPI_HOTKEYSCAN_GESTURES, 1928 TP_ACPI_HOTKEYSCAN_UNK11, 1929 TP_ACPI_HOTKEYSCAN_UNK12, 1930 TP_ACPI_HOTKEYSCAN_UNK13, 1931 TP_ACPI_HOTKEYSCAN_CONFIG, 1932 TP_ACPI_HOTKEYSCAN_NEW_TAB, 1933 TP_ACPI_HOTKEYSCAN_RELOAD, 1934 TP_ACPI_HOTKEYSCAN_BACK, 1935 TP_ACPI_HOTKEYSCAN_MIC_DOWN, 1936 TP_ACPI_HOTKEYSCAN_MIC_UP, 1937 TP_ACPI_HOTKEYSCAN_MIC_CANCELLATION, 1938 TP_ACPI_HOTKEYSCAN_CAMERA_MODE, 1939 TP_ACPI_HOTKEYSCAN_ROTATE_DISPLAY, 1940 1941 /* Lenovo extended keymap, starting at 0x1300 */ 1942 TP_ACPI_HOTKEYSCAN_EXTENDED_START, 1943 /* first new observed key (star, favorites) is 0x1311 */ 1944 TP_ACPI_HOTKEYSCAN_STAR = 69, 1945 TP_ACPI_HOTKEYSCAN_CLIPPING_TOOL2, 1946 TP_ACPI_HOTKEYSCAN_CALCULATOR, 1947 TP_ACPI_HOTKEYSCAN_BLUETOOTH, 1948 TP_ACPI_HOTKEYSCAN_KEYBOARD, 1949 1950 /* Hotkey keymap size */ 1951 TPACPI_HOTKEY_MAP_LEN 1952 }; 1953 1954 enum { /* Keys/events available through NVRAM polling */ 1955 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1956 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1957 }; 1958 1959 enum { /* Positions of some of the keys in hotkey masks */ 1960 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1961 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1962 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1963 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1964 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1965 TP_ACPI_HKEY_KBD_LIGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1966 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1967 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1968 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1969 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1970 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1971 }; 1972 1973 enum { /* NVRAM to ACPI HKEY group map */ 1974 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1975 TP_ACPI_HKEY_ZOOM_MASK | 1976 TP_ACPI_HKEY_DISPSWTCH_MASK | 1977 TP_ACPI_HKEY_HIBERNATE_MASK, 1978 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1979 TP_ACPI_HKEY_BRGHTDWN_MASK, 1980 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1981 TP_ACPI_HKEY_VOLDWN_MASK | 1982 TP_ACPI_HKEY_MUTE_MASK, 1983 }; 1984 1985 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1986 struct tp_nvram_state { 1987 u16 thinkpad_toggle:1; 1988 u16 zoom_toggle:1; 1989 u16 display_toggle:1; 1990 u16 thinklight_toggle:1; 1991 u16 hibernate_toggle:1; 1992 u16 displayexp_toggle:1; 1993 u16 display_state:1; 1994 u16 brightness_toggle:1; 1995 u16 volume_toggle:1; 1996 u16 mute:1; 1997 1998 u8 brightness_level; 1999 u8 volume_level; 2000 }; 2001 2002 /* kthread for the hotkey poller */ 2003 static struct task_struct *tpacpi_hotkey_task; 2004 2005 /* 2006 * Acquire mutex to write poller control variables as an 2007 * atomic block. 2008 * 2009 * Increment hotkey_config_change when changing them if you 2010 * want the kthread to forget old state. 2011 * 2012 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2013 */ 2014 static struct mutex hotkey_thread_data_mutex; 2015 static unsigned int hotkey_config_change; 2016 2017 /* 2018 * hotkey poller control variables 2019 * 2020 * Must be atomic or readers will also need to acquire mutex 2021 * 2022 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2023 * should be used only when the changes need to be taken as 2024 * a block, OR when one needs to force the kthread to forget 2025 * old state. 2026 */ 2027 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2028 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2029 2030 #define HOTKEY_CONFIG_CRITICAL_START \ 2031 do { \ 2032 mutex_lock(&hotkey_thread_data_mutex); \ 2033 hotkey_config_change++; \ 2034 } while (0); 2035 #define HOTKEY_CONFIG_CRITICAL_END \ 2036 mutex_unlock(&hotkey_thread_data_mutex); 2037 2038 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2039 2040 #define hotkey_source_mask 0U 2041 #define HOTKEY_CONFIG_CRITICAL_START 2042 #define HOTKEY_CONFIG_CRITICAL_END 2043 2044 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2045 2046 static struct mutex hotkey_mutex; 2047 2048 static enum { /* Reasons for waking up */ 2049 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2050 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2051 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2052 } hotkey_wakeup_reason; 2053 2054 static int hotkey_autosleep_ack; 2055 2056 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2057 static u32 hotkey_all_mask; /* all events supported in fw */ 2058 static u32 hotkey_adaptive_all_mask; /* all adaptive events supported in fw */ 2059 static u32 hotkey_reserved_mask; /* events better left disabled */ 2060 static u32 hotkey_driver_mask; /* events needed by the driver */ 2061 static u32 hotkey_user_mask; /* events visible to userspace */ 2062 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2063 2064 static u16 *hotkey_keycode_map; 2065 2066 static struct attribute_set *hotkey_dev_attributes; 2067 2068 static void tpacpi_driver_event(const unsigned int hkey_event); 2069 static void hotkey_driver_event(const unsigned int scancode); 2070 static void hotkey_poll_setup(const bool may_warn); 2071 2072 /* HKEY.MHKG() return bits */ 2073 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2074 enum { 2075 TP_ACPI_MULTI_MODE_INVALID = 0, 2076 TP_ACPI_MULTI_MODE_UNKNOWN = 1 << 0, 2077 TP_ACPI_MULTI_MODE_LAPTOP = 1 << 1, 2078 TP_ACPI_MULTI_MODE_TABLET = 1 << 2, 2079 TP_ACPI_MULTI_MODE_FLAT = 1 << 3, 2080 TP_ACPI_MULTI_MODE_STAND = 1 << 4, 2081 TP_ACPI_MULTI_MODE_TENT = 1 << 5, 2082 TP_ACPI_MULTI_MODE_STAND_TENT = 1 << 6, 2083 }; 2084 2085 enum { 2086 /* The following modes are considered tablet mode for the purpose of 2087 * reporting the status to userspace. i.e. in all these modes it makes 2088 * sense to disable the laptop input devices such as touchpad and 2089 * keyboard. 2090 */ 2091 TP_ACPI_MULTI_MODE_TABLET_LIKE = TP_ACPI_MULTI_MODE_TABLET | 2092 TP_ACPI_MULTI_MODE_STAND | 2093 TP_ACPI_MULTI_MODE_TENT | 2094 TP_ACPI_MULTI_MODE_STAND_TENT, 2095 }; 2096 2097 static int hotkey_get_wlsw(void) 2098 { 2099 int status; 2100 2101 if (!tp_features.hotkey_wlsw) 2102 return -ENODEV; 2103 2104 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2105 if (dbg_wlswemul) 2106 return (tpacpi_wlsw_emulstate) ? 2107 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2108 #endif 2109 2110 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2111 return -EIO; 2112 2113 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2114 } 2115 2116 static int hotkey_gmms_get_tablet_mode(int s, int *has_tablet_mode) 2117 { 2118 int type = (s >> 16) & 0xffff; 2119 int value = s & 0xffff; 2120 int mode = TP_ACPI_MULTI_MODE_INVALID; 2121 int valid_modes = 0; 2122 2123 if (has_tablet_mode) 2124 *has_tablet_mode = 0; 2125 2126 switch (type) { 2127 case 1: 2128 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2129 TP_ACPI_MULTI_MODE_TABLET | 2130 TP_ACPI_MULTI_MODE_STAND_TENT; 2131 break; 2132 case 2: 2133 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2134 TP_ACPI_MULTI_MODE_FLAT | 2135 TP_ACPI_MULTI_MODE_TABLET | 2136 TP_ACPI_MULTI_MODE_STAND | 2137 TP_ACPI_MULTI_MODE_TENT; 2138 break; 2139 case 3: 2140 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2141 TP_ACPI_MULTI_MODE_FLAT; 2142 break; 2143 case 4: 2144 case 5: 2145 /* In mode 4, FLAT is not specified as a valid mode. However, 2146 * it can be seen at least on the X1 Yoga 2nd Generation. 2147 */ 2148 valid_modes = TP_ACPI_MULTI_MODE_LAPTOP | 2149 TP_ACPI_MULTI_MODE_FLAT | 2150 TP_ACPI_MULTI_MODE_TABLET | 2151 TP_ACPI_MULTI_MODE_STAND | 2152 TP_ACPI_MULTI_MODE_TENT; 2153 break; 2154 default: 2155 pr_err("Unknown multi mode status type %d with value 0x%04X, please report this to %s\n", 2156 type, value, TPACPI_MAIL); 2157 return 0; 2158 } 2159 2160 if (has_tablet_mode && (valid_modes & TP_ACPI_MULTI_MODE_TABLET_LIKE)) 2161 *has_tablet_mode = 1; 2162 2163 switch (value) { 2164 case 1: 2165 mode = TP_ACPI_MULTI_MODE_LAPTOP; 2166 break; 2167 case 2: 2168 mode = TP_ACPI_MULTI_MODE_FLAT; 2169 break; 2170 case 3: 2171 mode = TP_ACPI_MULTI_MODE_TABLET; 2172 break; 2173 case 4: 2174 if (type == 1) 2175 mode = TP_ACPI_MULTI_MODE_STAND_TENT; 2176 else 2177 mode = TP_ACPI_MULTI_MODE_STAND; 2178 break; 2179 case 5: 2180 mode = TP_ACPI_MULTI_MODE_TENT; 2181 break; 2182 default: 2183 if (type == 5 && value == 0xffff) { 2184 pr_warn("Multi mode status is undetected, assuming laptop\n"); 2185 return 0; 2186 } 2187 } 2188 2189 if (!(mode & valid_modes)) { 2190 pr_err("Unknown/reserved multi mode value 0x%04X for type %d, please report this to %s\n", 2191 value, type, TPACPI_MAIL); 2192 return 0; 2193 } 2194 2195 return !!(mode & TP_ACPI_MULTI_MODE_TABLET_LIKE); 2196 } 2197 2198 static int hotkey_get_tablet_mode(int *status) 2199 { 2200 int s; 2201 2202 switch (tp_features.hotkey_tablet) { 2203 case TP_HOTKEY_TABLET_USES_MHKG: 2204 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2205 return -EIO; 2206 2207 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2208 break; 2209 case TP_HOTKEY_TABLET_USES_GMMS: 2210 if (!acpi_evalf(hkey_handle, &s, "GMMS", "dd", 0)) 2211 return -EIO; 2212 2213 *status = hotkey_gmms_get_tablet_mode(s, NULL); 2214 break; 2215 default: 2216 break; 2217 } 2218 2219 return 0; 2220 } 2221 2222 /* 2223 * Reads current event mask from firmware, and updates 2224 * hotkey_acpi_mask accordingly. Also resets any bits 2225 * from hotkey_user_mask that are unavailable to be 2226 * delivered (shadow requirement of the userspace ABI). 2227 * 2228 * Call with hotkey_mutex held 2229 */ 2230 static int hotkey_mask_get(void) 2231 { 2232 if (tp_features.hotkey_mask) { 2233 u32 m = 0; 2234 2235 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2236 return -EIO; 2237 2238 hotkey_acpi_mask = m; 2239 } else { 2240 /* no mask support doesn't mean no event support... */ 2241 hotkey_acpi_mask = hotkey_all_mask; 2242 } 2243 2244 /* sync userspace-visible mask */ 2245 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2246 2247 return 0; 2248 } 2249 2250 static void hotkey_mask_warn_incomplete_mask(void) 2251 { 2252 /* log only what the user can fix... */ 2253 const u32 wantedmask = hotkey_driver_mask & 2254 ~(hotkey_acpi_mask | hotkey_source_mask) & 2255 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2256 2257 if (wantedmask) 2258 pr_notice("required events 0x%08x not enabled!\n", wantedmask); 2259 } 2260 2261 /* 2262 * Set the firmware mask when supported 2263 * 2264 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2265 * 2266 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2267 * 2268 * Call with hotkey_mutex held 2269 */ 2270 static int hotkey_mask_set(u32 mask) 2271 { 2272 int i; 2273 int rc = 0; 2274 2275 const u32 fwmask = mask & ~hotkey_source_mask; 2276 2277 if (tp_features.hotkey_mask) { 2278 for (i = 0; i < 32; i++) { 2279 if (!acpi_evalf(hkey_handle, 2280 NULL, "MHKM", "vdd", i + 1, 2281 !!(mask & (1 << i)))) { 2282 rc = -EIO; 2283 break; 2284 } 2285 } 2286 } 2287 2288 /* 2289 * We *must* make an inconditional call to hotkey_mask_get to 2290 * refresh hotkey_acpi_mask and update hotkey_user_mask 2291 * 2292 * Take the opportunity to also log when we cannot _enable_ 2293 * a given event. 2294 */ 2295 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2296 pr_notice("asked for hotkey mask 0x%08x, but firmware forced it to 0x%08x\n", 2297 fwmask, hotkey_acpi_mask); 2298 } 2299 2300 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2301 hotkey_mask_warn_incomplete_mask(); 2302 2303 return rc; 2304 } 2305 2306 /* 2307 * Sets hotkey_user_mask and tries to set the firmware mask 2308 * 2309 * Call with hotkey_mutex held 2310 */ 2311 static int hotkey_user_mask_set(const u32 mask) 2312 { 2313 int rc; 2314 2315 /* Give people a chance to notice they are doing something that 2316 * is bound to go boom on their users sooner or later */ 2317 if (!tp_warned.hotkey_mask_ff && 2318 (mask == 0xffff || mask == 0xffffff || 2319 mask == 0xffffffff)) { 2320 tp_warned.hotkey_mask_ff = 1; 2321 pr_notice("setting the hotkey mask to 0x%08x is likely not the best way to go about it\n", 2322 mask); 2323 pr_notice("please consider using the driver defaults, and refer to up-to-date thinkpad-acpi documentation\n"); 2324 } 2325 2326 /* Try to enable what the user asked for, plus whatever we need. 2327 * this syncs everything but won't enable bits in hotkey_user_mask */ 2328 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2329 2330 /* Enable the available bits in hotkey_user_mask */ 2331 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2332 2333 return rc; 2334 } 2335 2336 /* 2337 * Sets the driver hotkey mask. 2338 * 2339 * Can be called even if the hotkey subdriver is inactive 2340 */ 2341 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2342 { 2343 int rc; 2344 2345 /* Do the right thing if hotkey_init has not been called yet */ 2346 if (!tp_features.hotkey) { 2347 hotkey_driver_mask = mask; 2348 return 0; 2349 } 2350 2351 mutex_lock(&hotkey_mutex); 2352 2353 HOTKEY_CONFIG_CRITICAL_START 2354 hotkey_driver_mask = mask; 2355 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2356 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2357 #endif 2358 HOTKEY_CONFIG_CRITICAL_END 2359 2360 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2361 ~hotkey_source_mask); 2362 hotkey_poll_setup(true); 2363 2364 mutex_unlock(&hotkey_mutex); 2365 2366 return rc; 2367 } 2368 2369 static int hotkey_status_get(int *status) 2370 { 2371 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2372 return -EIO; 2373 2374 return 0; 2375 } 2376 2377 static int hotkey_status_set(bool enable) 2378 { 2379 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2380 return -EIO; 2381 2382 return 0; 2383 } 2384 2385 static void tpacpi_input_send_tabletsw(void) 2386 { 2387 int state; 2388 2389 if (tp_features.hotkey_tablet && 2390 !hotkey_get_tablet_mode(&state)) { 2391 mutex_lock(&tpacpi_inputdev_send_mutex); 2392 2393 input_report_switch(tpacpi_inputdev, 2394 SW_TABLET_MODE, !!state); 2395 input_sync(tpacpi_inputdev); 2396 2397 mutex_unlock(&tpacpi_inputdev_send_mutex); 2398 } 2399 } 2400 2401 /* Do NOT call without validating scancode first */ 2402 static void tpacpi_input_send_key(const unsigned int scancode) 2403 { 2404 const unsigned int keycode = hotkey_keycode_map[scancode]; 2405 2406 if (keycode != KEY_RESERVED) { 2407 mutex_lock(&tpacpi_inputdev_send_mutex); 2408 2409 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2410 input_report_key(tpacpi_inputdev, keycode, 1); 2411 input_sync(tpacpi_inputdev); 2412 2413 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2414 input_report_key(tpacpi_inputdev, keycode, 0); 2415 input_sync(tpacpi_inputdev); 2416 2417 mutex_unlock(&tpacpi_inputdev_send_mutex); 2418 } 2419 } 2420 2421 /* Do NOT call without validating scancode first */ 2422 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2423 { 2424 hotkey_driver_event(scancode); 2425 if (hotkey_user_mask & (1 << scancode)) 2426 tpacpi_input_send_key(scancode); 2427 } 2428 2429 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2430 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2431 2432 /* Do NOT call without validating scancode first */ 2433 static void tpacpi_hotkey_send_key(unsigned int scancode) 2434 { 2435 tpacpi_input_send_key_masked(scancode); 2436 } 2437 2438 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2439 { 2440 u8 d; 2441 2442 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2443 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2444 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2445 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2446 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2447 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2448 } 2449 if (m & TP_ACPI_HKEY_KBD_LIGHT_MASK) { 2450 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2451 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2452 } 2453 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2454 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2455 n->displayexp_toggle = 2456 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2457 } 2458 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2459 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2460 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2461 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2462 n->brightness_toggle = 2463 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2464 } 2465 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2466 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2467 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2468 >> TP_NVRAM_POS_LEVEL_VOLUME; 2469 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2470 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2471 } 2472 } 2473 2474 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2475 do { \ 2476 if ((event_mask & (1 << __scancode)) && \ 2477 oldn->__member != newn->__member) \ 2478 tpacpi_hotkey_send_key(__scancode); \ 2479 } while (0) 2480 2481 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2482 do { \ 2483 if (event_mask & (1 << __scancode)) \ 2484 tpacpi_hotkey_send_key(__scancode); \ 2485 } while (0) 2486 2487 static void issue_volchange(const unsigned int oldvol, 2488 const unsigned int newvol, 2489 const u32 event_mask) 2490 { 2491 unsigned int i = oldvol; 2492 2493 while (i > newvol) { 2494 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2495 i--; 2496 } 2497 while (i < newvol) { 2498 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2499 i++; 2500 } 2501 } 2502 2503 static void issue_brightnesschange(const unsigned int oldbrt, 2504 const unsigned int newbrt, 2505 const u32 event_mask) 2506 { 2507 unsigned int i = oldbrt; 2508 2509 while (i > newbrt) { 2510 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2511 i--; 2512 } 2513 while (i < newbrt) { 2514 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2515 i++; 2516 } 2517 } 2518 2519 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2520 struct tp_nvram_state *newn, 2521 const u32 event_mask) 2522 { 2523 2524 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2525 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2526 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2527 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2528 2529 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2530 2531 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2532 2533 /* 2534 * Handle volume 2535 * 2536 * This code is supposed to duplicate the IBM firmware behaviour: 2537 * - Pressing MUTE issues mute hotkey message, even when already mute 2538 * - Pressing Volume up/down issues volume up/down hotkey messages, 2539 * even when already at maximum or minimum volume 2540 * - The act of unmuting issues volume up/down notification, 2541 * depending which key was used to unmute 2542 * 2543 * We are constrained to what the NVRAM can tell us, which is not much 2544 * and certainly not enough if more than one volume hotkey was pressed 2545 * since the last poll cycle. 2546 * 2547 * Just to make our life interesting, some newer Lenovo ThinkPads have 2548 * bugs in the BIOS and may fail to update volume_toggle properly. 2549 */ 2550 if (newn->mute) { 2551 /* muted */ 2552 if (!oldn->mute || 2553 oldn->volume_toggle != newn->volume_toggle || 2554 oldn->volume_level != newn->volume_level) { 2555 /* recently muted, or repeated mute keypress, or 2556 * multiple presses ending in mute */ 2557 issue_volchange(oldn->volume_level, newn->volume_level, 2558 event_mask); 2559 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2560 } 2561 } else { 2562 /* unmute */ 2563 if (oldn->mute) { 2564 /* recently unmuted, issue 'unmute' keypress */ 2565 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2566 } 2567 if (oldn->volume_level != newn->volume_level) { 2568 issue_volchange(oldn->volume_level, newn->volume_level, 2569 event_mask); 2570 } else if (oldn->volume_toggle != newn->volume_toggle) { 2571 /* repeated vol up/down keypress at end of scale ? */ 2572 if (newn->volume_level == 0) 2573 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2574 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2575 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2576 } 2577 } 2578 2579 /* handle brightness */ 2580 if (oldn->brightness_level != newn->brightness_level) { 2581 issue_brightnesschange(oldn->brightness_level, 2582 newn->brightness_level, event_mask); 2583 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2584 /* repeated key presses that didn't change state */ 2585 if (newn->brightness_level == 0) 2586 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2587 else if (newn->brightness_level >= bright_maxlvl 2588 && !tp_features.bright_unkfw) 2589 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2590 } 2591 2592 #undef TPACPI_COMPARE_KEY 2593 #undef TPACPI_MAY_SEND_KEY 2594 } 2595 2596 /* 2597 * Polling driver 2598 * 2599 * We track all events in hotkey_source_mask all the time, since 2600 * most of them are edge-based. We only issue those requested by 2601 * hotkey_user_mask or hotkey_driver_mask, though. 2602 */ 2603 static int hotkey_kthread(void *data) 2604 { 2605 struct tp_nvram_state s[2]; 2606 u32 poll_mask, event_mask; 2607 unsigned int si, so; 2608 unsigned long t; 2609 unsigned int change_detector; 2610 unsigned int poll_freq; 2611 bool was_frozen; 2612 2613 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2614 goto exit; 2615 2616 set_freezable(); 2617 2618 so = 0; 2619 si = 1; 2620 t = 0; 2621 2622 /* Initial state for compares */ 2623 mutex_lock(&hotkey_thread_data_mutex); 2624 change_detector = hotkey_config_change; 2625 poll_mask = hotkey_source_mask; 2626 event_mask = hotkey_source_mask & 2627 (hotkey_driver_mask | hotkey_user_mask); 2628 poll_freq = hotkey_poll_freq; 2629 mutex_unlock(&hotkey_thread_data_mutex); 2630 hotkey_read_nvram(&s[so], poll_mask); 2631 2632 while (!kthread_should_stop()) { 2633 if (t == 0) { 2634 if (likely(poll_freq)) 2635 t = 1000/poll_freq; 2636 else 2637 t = 100; /* should never happen... */ 2638 } 2639 t = msleep_interruptible(t); 2640 if (unlikely(kthread_freezable_should_stop(&was_frozen))) 2641 break; 2642 2643 if (t > 0 && !was_frozen) 2644 continue; 2645 2646 mutex_lock(&hotkey_thread_data_mutex); 2647 if (was_frozen || hotkey_config_change != change_detector) { 2648 /* forget old state on thaw or config change */ 2649 si = so; 2650 t = 0; 2651 change_detector = hotkey_config_change; 2652 } 2653 poll_mask = hotkey_source_mask; 2654 event_mask = hotkey_source_mask & 2655 (hotkey_driver_mask | hotkey_user_mask); 2656 poll_freq = hotkey_poll_freq; 2657 mutex_unlock(&hotkey_thread_data_mutex); 2658 2659 if (likely(poll_mask)) { 2660 hotkey_read_nvram(&s[si], poll_mask); 2661 if (likely(si != so)) { 2662 hotkey_compare_and_issue_event(&s[so], &s[si], 2663 event_mask); 2664 } 2665 } 2666 2667 so = si; 2668 si ^= 1; 2669 } 2670 2671 exit: 2672 return 0; 2673 } 2674 2675 /* call with hotkey_mutex held */ 2676 static void hotkey_poll_stop_sync(void) 2677 { 2678 if (tpacpi_hotkey_task) { 2679 kthread_stop(tpacpi_hotkey_task); 2680 tpacpi_hotkey_task = NULL; 2681 } 2682 } 2683 2684 /* call with hotkey_mutex held */ 2685 static void hotkey_poll_setup(const bool may_warn) 2686 { 2687 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2688 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2689 2690 if (hotkey_poll_freq > 0 && 2691 (poll_driver_mask || 2692 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2693 if (!tpacpi_hotkey_task) { 2694 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2695 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2696 if (IS_ERR(tpacpi_hotkey_task)) { 2697 tpacpi_hotkey_task = NULL; 2698 pr_err("could not create kernel thread for hotkey polling\n"); 2699 } 2700 } 2701 } else { 2702 hotkey_poll_stop_sync(); 2703 if (may_warn && (poll_driver_mask || poll_user_mask) && 2704 hotkey_poll_freq == 0) { 2705 pr_notice("hot keys 0x%08x and/or events 0x%08x require polling, which is currently disabled\n", 2706 poll_user_mask, poll_driver_mask); 2707 } 2708 } 2709 } 2710 2711 static void hotkey_poll_setup_safe(const bool may_warn) 2712 { 2713 mutex_lock(&hotkey_mutex); 2714 hotkey_poll_setup(may_warn); 2715 mutex_unlock(&hotkey_mutex); 2716 } 2717 2718 /* call with hotkey_mutex held */ 2719 static void hotkey_poll_set_freq(unsigned int freq) 2720 { 2721 if (!freq) 2722 hotkey_poll_stop_sync(); 2723 2724 hotkey_poll_freq = freq; 2725 } 2726 2727 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2728 2729 static void hotkey_poll_setup(const bool __unused) 2730 { 2731 } 2732 2733 static void hotkey_poll_setup_safe(const bool __unused) 2734 { 2735 } 2736 2737 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2738 2739 static int hotkey_inputdev_open(struct input_dev *dev) 2740 { 2741 switch (tpacpi_lifecycle) { 2742 case TPACPI_LIFE_INIT: 2743 case TPACPI_LIFE_RUNNING: 2744 hotkey_poll_setup_safe(false); 2745 return 0; 2746 case TPACPI_LIFE_EXITING: 2747 return -EBUSY; 2748 } 2749 2750 /* Should only happen if tpacpi_lifecycle is corrupt */ 2751 BUG(); 2752 return -EBUSY; 2753 } 2754 2755 static void hotkey_inputdev_close(struct input_dev *dev) 2756 { 2757 /* disable hotkey polling when possible */ 2758 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2759 !(hotkey_source_mask & hotkey_driver_mask)) 2760 hotkey_poll_setup_safe(false); 2761 } 2762 2763 /* sysfs hotkey enable ------------------------------------------------- */ 2764 static ssize_t hotkey_enable_show(struct device *dev, 2765 struct device_attribute *attr, 2766 char *buf) 2767 { 2768 int res, status; 2769 2770 printk_deprecated_attribute("hotkey_enable", 2771 "Hotkey reporting is always enabled"); 2772 2773 res = hotkey_status_get(&status); 2774 if (res) 2775 return res; 2776 2777 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2778 } 2779 2780 static ssize_t hotkey_enable_store(struct device *dev, 2781 struct device_attribute *attr, 2782 const char *buf, size_t count) 2783 { 2784 unsigned long t; 2785 2786 printk_deprecated_attribute("hotkey_enable", 2787 "Hotkeys can be disabled through hotkey_mask"); 2788 2789 if (parse_strtoul(buf, 1, &t)) 2790 return -EINVAL; 2791 2792 if (t == 0) 2793 return -EPERM; 2794 2795 return count; 2796 } 2797 2798 static DEVICE_ATTR_RW(hotkey_enable); 2799 2800 /* sysfs hotkey mask --------------------------------------------------- */ 2801 static ssize_t hotkey_mask_show(struct device *dev, 2802 struct device_attribute *attr, 2803 char *buf) 2804 { 2805 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2806 } 2807 2808 static ssize_t hotkey_mask_store(struct device *dev, 2809 struct device_attribute *attr, 2810 const char *buf, size_t count) 2811 { 2812 unsigned long t; 2813 int res; 2814 2815 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2816 return -EINVAL; 2817 2818 if (mutex_lock_killable(&hotkey_mutex)) 2819 return -ERESTARTSYS; 2820 2821 res = hotkey_user_mask_set(t); 2822 2823 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2824 hotkey_poll_setup(true); 2825 #endif 2826 2827 mutex_unlock(&hotkey_mutex); 2828 2829 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2830 2831 return (res) ? res : count; 2832 } 2833 2834 static DEVICE_ATTR_RW(hotkey_mask); 2835 2836 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2837 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2838 struct device_attribute *attr, 2839 char *buf) 2840 { 2841 return sprintf(buf, "0\n"); 2842 } 2843 2844 static DEVICE_ATTR_RO(hotkey_bios_enabled); 2845 2846 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2847 static ssize_t hotkey_bios_mask_show(struct device *dev, 2848 struct device_attribute *attr, 2849 char *buf) 2850 { 2851 printk_deprecated_attribute("hotkey_bios_mask", 2852 "This attribute is useless."); 2853 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2854 } 2855 2856 static DEVICE_ATTR_RO(hotkey_bios_mask); 2857 2858 /* sysfs hotkey all_mask ----------------------------------------------- */ 2859 static ssize_t hotkey_all_mask_show(struct device *dev, 2860 struct device_attribute *attr, 2861 char *buf) 2862 { 2863 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2864 hotkey_all_mask | hotkey_source_mask); 2865 } 2866 2867 static DEVICE_ATTR_RO(hotkey_all_mask); 2868 2869 /* sysfs hotkey all_mask ----------------------------------------------- */ 2870 static ssize_t hotkey_adaptive_all_mask_show(struct device *dev, 2871 struct device_attribute *attr, 2872 char *buf) 2873 { 2874 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2875 hotkey_adaptive_all_mask | hotkey_source_mask); 2876 } 2877 2878 static DEVICE_ATTR_RO(hotkey_adaptive_all_mask); 2879 2880 /* sysfs hotkey recommended_mask --------------------------------------- */ 2881 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2882 struct device_attribute *attr, 2883 char *buf) 2884 { 2885 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2886 (hotkey_all_mask | hotkey_source_mask) 2887 & ~hotkey_reserved_mask); 2888 } 2889 2890 static DEVICE_ATTR_RO(hotkey_recommended_mask); 2891 2892 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2893 2894 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2895 static ssize_t hotkey_source_mask_show(struct device *dev, 2896 struct device_attribute *attr, 2897 char *buf) 2898 { 2899 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2900 } 2901 2902 static ssize_t hotkey_source_mask_store(struct device *dev, 2903 struct device_attribute *attr, 2904 const char *buf, size_t count) 2905 { 2906 unsigned long t; 2907 u32 r_ev; 2908 int rc; 2909 2910 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2911 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2912 return -EINVAL; 2913 2914 if (mutex_lock_killable(&hotkey_mutex)) 2915 return -ERESTARTSYS; 2916 2917 HOTKEY_CONFIG_CRITICAL_START 2918 hotkey_source_mask = t; 2919 HOTKEY_CONFIG_CRITICAL_END 2920 2921 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2922 ~hotkey_source_mask); 2923 hotkey_poll_setup(true); 2924 2925 /* check if events needed by the driver got disabled */ 2926 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2927 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2928 2929 mutex_unlock(&hotkey_mutex); 2930 2931 if (rc < 0) 2932 pr_err("hotkey_source_mask: failed to update the firmware event mask!\n"); 2933 2934 if (r_ev) 2935 pr_notice("hotkey_source_mask: some important events were disabled: 0x%04x\n", 2936 r_ev); 2937 2938 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2939 2940 return (rc < 0) ? rc : count; 2941 } 2942 2943 static DEVICE_ATTR_RW(hotkey_source_mask); 2944 2945 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2946 static ssize_t hotkey_poll_freq_show(struct device *dev, 2947 struct device_attribute *attr, 2948 char *buf) 2949 { 2950 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2951 } 2952 2953 static ssize_t hotkey_poll_freq_store(struct device *dev, 2954 struct device_attribute *attr, 2955 const char *buf, size_t count) 2956 { 2957 unsigned long t; 2958 2959 if (parse_strtoul(buf, 25, &t)) 2960 return -EINVAL; 2961 2962 if (mutex_lock_killable(&hotkey_mutex)) 2963 return -ERESTARTSYS; 2964 2965 hotkey_poll_set_freq(t); 2966 hotkey_poll_setup(true); 2967 2968 mutex_unlock(&hotkey_mutex); 2969 2970 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2971 2972 return count; 2973 } 2974 2975 static DEVICE_ATTR_RW(hotkey_poll_freq); 2976 2977 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2978 2979 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2980 static ssize_t hotkey_radio_sw_show(struct device *dev, 2981 struct device_attribute *attr, 2982 char *buf) 2983 { 2984 int res; 2985 res = hotkey_get_wlsw(); 2986 if (res < 0) 2987 return res; 2988 2989 /* Opportunistic update */ 2990 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2991 2992 return snprintf(buf, PAGE_SIZE, "%d\n", 2993 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2994 } 2995 2996 static DEVICE_ATTR_RO(hotkey_radio_sw); 2997 2998 static void hotkey_radio_sw_notify_change(void) 2999 { 3000 if (tp_features.hotkey_wlsw) 3001 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3002 "hotkey_radio_sw"); 3003 } 3004 3005 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 3006 static ssize_t hotkey_tablet_mode_show(struct device *dev, 3007 struct device_attribute *attr, 3008 char *buf) 3009 { 3010 int res, s; 3011 res = hotkey_get_tablet_mode(&s); 3012 if (res < 0) 3013 return res; 3014 3015 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 3016 } 3017 3018 static DEVICE_ATTR_RO(hotkey_tablet_mode); 3019 3020 static void hotkey_tablet_mode_notify_change(void) 3021 { 3022 if (tp_features.hotkey_tablet) 3023 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3024 "hotkey_tablet_mode"); 3025 } 3026 3027 /* sysfs wakeup reason (pollable) -------------------------------------- */ 3028 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 3029 struct device_attribute *attr, 3030 char *buf) 3031 { 3032 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 3033 } 3034 3035 static DEVICE_ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 3036 3037 static void hotkey_wakeup_reason_notify_change(void) 3038 { 3039 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3040 "wakeup_reason"); 3041 } 3042 3043 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 3044 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 3045 struct device_attribute *attr, 3046 char *buf) 3047 { 3048 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 3049 } 3050 3051 static DEVICE_ATTR(wakeup_hotunplug_complete, S_IRUGO, 3052 hotkey_wakeup_hotunplug_complete_show, NULL); 3053 3054 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 3055 { 3056 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 3057 "wakeup_hotunplug_complete"); 3058 } 3059 3060 /* sysfs adaptive kbd mode --------------------------------------------- */ 3061 3062 static int adaptive_keyboard_get_mode(void); 3063 static int adaptive_keyboard_set_mode(int new_mode); 3064 3065 enum ADAPTIVE_KEY_MODE { 3066 HOME_MODE, 3067 WEB_BROWSER_MODE, 3068 WEB_CONFERENCE_MODE, 3069 FUNCTION_MODE, 3070 LAYFLAT_MODE 3071 }; 3072 3073 static ssize_t adaptive_kbd_mode_show(struct device *dev, 3074 struct device_attribute *attr, 3075 char *buf) 3076 { 3077 int current_mode; 3078 3079 current_mode = adaptive_keyboard_get_mode(); 3080 if (current_mode < 0) 3081 return current_mode; 3082 3083 return snprintf(buf, PAGE_SIZE, "%d\n", current_mode); 3084 } 3085 3086 static ssize_t adaptive_kbd_mode_store(struct device *dev, 3087 struct device_attribute *attr, 3088 const char *buf, size_t count) 3089 { 3090 unsigned long t; 3091 int res; 3092 3093 if (parse_strtoul(buf, LAYFLAT_MODE, &t)) 3094 return -EINVAL; 3095 3096 res = adaptive_keyboard_set_mode(t); 3097 return (res < 0) ? res : count; 3098 } 3099 3100 static DEVICE_ATTR_RW(adaptive_kbd_mode); 3101 3102 static struct attribute *adaptive_kbd_attributes[] = { 3103 &dev_attr_adaptive_kbd_mode.attr, 3104 NULL 3105 }; 3106 3107 static const struct attribute_group adaptive_kbd_attr_group = { 3108 .attrs = adaptive_kbd_attributes, 3109 }; 3110 3111 /* --------------------------------------------------------------------- */ 3112 3113 static struct attribute *hotkey_attributes[] __initdata = { 3114 &dev_attr_hotkey_enable.attr, 3115 &dev_attr_hotkey_bios_enabled.attr, 3116 &dev_attr_hotkey_bios_mask.attr, 3117 &dev_attr_wakeup_reason.attr, 3118 &dev_attr_wakeup_hotunplug_complete.attr, 3119 &dev_attr_hotkey_mask.attr, 3120 &dev_attr_hotkey_all_mask.attr, 3121 &dev_attr_hotkey_adaptive_all_mask.attr, 3122 &dev_attr_hotkey_recommended_mask.attr, 3123 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3124 &dev_attr_hotkey_source_mask.attr, 3125 &dev_attr_hotkey_poll_freq.attr, 3126 #endif 3127 }; 3128 3129 /* 3130 * Sync both the hw and sw blocking state of all switches 3131 */ 3132 static void tpacpi_send_radiosw_update(void) 3133 { 3134 int wlsw; 3135 3136 /* 3137 * We must sync all rfkill controllers *before* issuing any 3138 * rfkill input events, or we will race the rfkill core input 3139 * handler. 3140 * 3141 * tpacpi_inputdev_send_mutex works as a synchronization point 3142 * for the above. 3143 * 3144 * We optimize to avoid numerous calls to hotkey_get_wlsw. 3145 */ 3146 3147 wlsw = hotkey_get_wlsw(); 3148 3149 /* Sync hw blocking state first if it is hw-blocked */ 3150 if (wlsw == TPACPI_RFK_RADIO_OFF) 3151 tpacpi_rfk_update_hwblock_state(true); 3152 3153 /* Sync sw blocking state */ 3154 tpacpi_rfk_update_swstate_all(); 3155 3156 /* Sync hw blocking state last if it is hw-unblocked */ 3157 if (wlsw == TPACPI_RFK_RADIO_ON) 3158 tpacpi_rfk_update_hwblock_state(false); 3159 3160 /* Issue rfkill input event for WLSW switch */ 3161 if (!(wlsw < 0)) { 3162 mutex_lock(&tpacpi_inputdev_send_mutex); 3163 3164 input_report_switch(tpacpi_inputdev, 3165 SW_RFKILL_ALL, (wlsw > 0)); 3166 input_sync(tpacpi_inputdev); 3167 3168 mutex_unlock(&tpacpi_inputdev_send_mutex); 3169 } 3170 3171 /* 3172 * this can be unconditional, as we will poll state again 3173 * if userspace uses the notify to read data 3174 */ 3175 hotkey_radio_sw_notify_change(); 3176 } 3177 3178 static void hotkey_exit(void) 3179 { 3180 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3181 mutex_lock(&hotkey_mutex); 3182 hotkey_poll_stop_sync(); 3183 mutex_unlock(&hotkey_mutex); 3184 #endif 3185 3186 if (hotkey_dev_attributes) 3187 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3188 3189 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3190 "restoring original HKEY status and mask\n"); 3191 /* yes, there is a bitwise or below, we want the 3192 * functions to be called even if one of them fail */ 3193 if (((tp_features.hotkey_mask && 3194 hotkey_mask_set(hotkey_orig_mask)) | 3195 hotkey_status_set(false)) != 0) 3196 pr_err("failed to restore hot key mask to BIOS defaults\n"); 3197 } 3198 3199 static void __init hotkey_unmap(const unsigned int scancode) 3200 { 3201 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3202 clear_bit(hotkey_keycode_map[scancode], 3203 tpacpi_inputdev->keybit); 3204 hotkey_keycode_map[scancode] = KEY_RESERVED; 3205 } 3206 } 3207 3208 /* 3209 * HKEY quirks: 3210 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3211 */ 3212 3213 #define TPACPI_HK_Q_INIMASK 0x0001 3214 3215 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3216 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3217 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3218 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3219 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3220 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3221 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3222 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3223 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3224 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3225 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3226 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3227 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3228 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3229 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3230 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3231 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3232 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3233 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3234 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3235 }; 3236 3237 typedef u16 tpacpi_keymap_entry_t; 3238 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3239 3240 static int hotkey_init_tablet_mode(void) 3241 { 3242 int in_tablet_mode = 0, res; 3243 char *type = NULL; 3244 3245 if (acpi_evalf(hkey_handle, &res, "GMMS", "qdd", 0)) { 3246 int has_tablet_mode; 3247 3248 in_tablet_mode = hotkey_gmms_get_tablet_mode(res, 3249 &has_tablet_mode); 3250 if (has_tablet_mode) 3251 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_GMMS; 3252 type = "GMMS"; 3253 } else if (acpi_evalf(hkey_handle, &res, "MHKG", "qd")) { 3254 /* For X41t, X60t, X61t Tablets... */ 3255 tp_features.hotkey_tablet = TP_HOTKEY_TABLET_USES_MHKG; 3256 in_tablet_mode = !!(res & TP_HOTKEY_TABLET_MASK); 3257 type = "MHKG"; 3258 } 3259 3260 if (!tp_features.hotkey_tablet) 3261 return 0; 3262 3263 pr_info("Tablet mode switch found (type: %s), currently in %s mode\n", 3264 type, in_tablet_mode ? "tablet" : "laptop"); 3265 3266 res = add_to_attr_set(hotkey_dev_attributes, 3267 &dev_attr_hotkey_tablet_mode.attr); 3268 if (res) 3269 return -1; 3270 3271 return in_tablet_mode; 3272 } 3273 3274 static int __init hotkey_init(struct ibm_init_struct *iibm) 3275 { 3276 /* Requirements for changing the default keymaps: 3277 * 3278 * 1. Many of the keys are mapped to KEY_RESERVED for very 3279 * good reasons. Do not change them unless you have deep 3280 * knowledge on the IBM and Lenovo ThinkPad firmware for 3281 * the various ThinkPad models. The driver behaves 3282 * differently for KEY_RESERVED: such keys have their 3283 * hot key mask *unset* in mask_recommended, and also 3284 * in the initial hot key mask programmed into the 3285 * firmware at driver load time, which means the firm- 3286 * ware may react very differently if you change them to 3287 * something else; 3288 * 3289 * 2. You must be subscribed to the linux-thinkpad and 3290 * ibm-acpi-devel mailing lists, and you should read the 3291 * list archives since 2007 if you want to change the 3292 * keymaps. This requirement exists so that you will 3293 * know the past history of problems with the thinkpad- 3294 * acpi driver keymaps, and also that you will be 3295 * listening to any bug reports; 3296 * 3297 * 3. Do not send thinkpad-acpi specific patches directly to 3298 * for merging, *ever*. Send them to the linux-acpi 3299 * mailinglist for comments. Merging is to be done only 3300 * through acpi-test and the ACPI maintainer. 3301 * 3302 * If the above is too much to ask, don't change the keymap. 3303 * Ask the thinkpad-acpi maintainer to do it, instead. 3304 */ 3305 3306 enum keymap_index { 3307 TPACPI_KEYMAP_IBM_GENERIC = 0, 3308 TPACPI_KEYMAP_LENOVO_GENERIC, 3309 }; 3310 3311 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3312 /* Generic keymap for IBM ThinkPads */ 3313 [TPACPI_KEYMAP_IBM_GENERIC] = { 3314 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3315 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3316 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3317 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3318 3319 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3320 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3321 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3322 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3323 3324 /* brightness: firmware always reacts to them */ 3325 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3326 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3327 3328 /* Thinklight: firmware always react to it */ 3329 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3330 3331 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3332 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3333 3334 /* Volume: firmware always react to it and reprograms 3335 * the built-in *extra* mixer. Never map it to control 3336 * another mixer by default. */ 3337 KEY_RESERVED, /* 0x14: VOLUME UP */ 3338 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3339 KEY_RESERVED, /* 0x16: MUTE */ 3340 3341 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3342 3343 /* (assignments unknown, please report if found) */ 3344 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3345 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3346 3347 /* No assignments, only used for Adaptive keyboards. */ 3348 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3349 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 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, 3353 3354 /* No assignment, used for newer Lenovo models */ 3355 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3356 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3357 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3358 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3359 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3360 KEY_UNKNOWN, KEY_UNKNOWN 3361 3362 }, 3363 3364 /* Generic keymap for Lenovo ThinkPads */ 3365 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3366 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3367 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3368 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3369 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3370 3371 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3372 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3373 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3374 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3375 3376 /* These should be enabled --only-- when ACPI video 3377 * is disabled (i.e. in "vendor" mode), and are handled 3378 * in a special way by the init code */ 3379 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3380 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3381 3382 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3383 3384 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3385 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3386 3387 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3388 * react to it and reprograms the built-in *extra* mixer. 3389 * Never map it to control another mixer by default. 3390 * 3391 * T60?, T61, R60?, R61: firmware and EC tries to send 3392 * these over the regular keyboard, so these are no-ops, 3393 * but there are still weird bugs re. MUTE, so do not 3394 * change unless you get test reports from all Lenovo 3395 * models. May cause the BIOS to interfere with the 3396 * HDA mixer. 3397 */ 3398 KEY_RESERVED, /* 0x14: VOLUME UP */ 3399 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3400 KEY_RESERVED, /* 0x16: MUTE */ 3401 3402 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3403 3404 /* (assignments unknown, please report if found) */ 3405 KEY_UNKNOWN, KEY_UNKNOWN, 3406 3407 /* 3408 * The mic mute button only sends 0x1a. It does not 3409 * automatically mute the mic or change the mute light. 3410 */ 3411 KEY_MICMUTE, /* 0x1a: Mic mute (since ?400 or so) */ 3412 3413 /* (assignments unknown, please report if found) */ 3414 KEY_UNKNOWN, 3415 3416 /* Extra keys in use since the X240 / T440 / T540 */ 3417 KEY_CONFIG, KEY_SEARCH, KEY_SCALE, KEY_FILE, 3418 3419 /* 3420 * These are the adaptive keyboard keycodes for Carbon X1 2014. 3421 * The first item in this list is the Mute button which is 3422 * emitted with 0x103 through 3423 * adaptive_keyboard_hotkey_notify_hotkey() when the sound 3424 * symbol is held. 3425 * We'll need to offset those by 0x20. 3426 */ 3427 KEY_RESERVED, /* Mute held, 0x103 */ 3428 KEY_BRIGHTNESS_MIN, /* Backlight off */ 3429 KEY_RESERVED, /* Clipping tool */ 3430 KEY_RESERVED, /* Cloud */ 3431 KEY_RESERVED, 3432 KEY_VOICECOMMAND, /* Voice */ 3433 KEY_RESERVED, 3434 KEY_RESERVED, /* Gestures */ 3435 KEY_RESERVED, 3436 KEY_RESERVED, 3437 KEY_RESERVED, 3438 KEY_CONFIG, /* Settings */ 3439 KEY_RESERVED, /* New tab */ 3440 KEY_REFRESH, /* Reload */ 3441 KEY_BACK, /* Back */ 3442 KEY_RESERVED, /* Microphone down */ 3443 KEY_RESERVED, /* Microphone up */ 3444 KEY_RESERVED, /* Microphone cancellation */ 3445 KEY_RESERVED, /* Camera mode */ 3446 KEY_RESERVED, /* Rotate display, 0x116 */ 3447 3448 /* 3449 * These are found in 2017 models (e.g. T470s, X270). 3450 * The lowest known value is 0x311, which according to 3451 * the manual should launch a user defined favorite 3452 * application. 3453 * 3454 * The offset for these is TP_ACPI_HOTKEYSCAN_EXTENDED_START, 3455 * corresponding to 0x34. 3456 */ 3457 3458 /* (assignments unknown, please report if found) */ 3459 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3460 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3461 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3462 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3463 KEY_UNKNOWN, 3464 3465 KEY_BOOKMARKS, /* Favorite app, 0x311 */ 3466 KEY_RESERVED, /* Clipping tool */ 3467 KEY_CALC, /* Calculator (above numpad, P52) */ 3468 KEY_BLUETOOTH, /* Bluetooth */ 3469 KEY_KEYBOARD /* Keyboard, 0x315 */ 3470 }, 3471 }; 3472 3473 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3474 /* Generic maps (fallback) */ 3475 { 3476 .vendor = PCI_VENDOR_ID_IBM, 3477 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3478 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3479 }, 3480 { 3481 .vendor = PCI_VENDOR_ID_LENOVO, 3482 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3483 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3484 }, 3485 }; 3486 3487 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3488 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3489 3490 int res, i; 3491 int status; 3492 int hkeyv; 3493 bool radiosw_state = false; 3494 bool tabletsw_state = false; 3495 3496 unsigned long quirks; 3497 unsigned long keymap_id; 3498 3499 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3500 "initializing hotkey subdriver\n"); 3501 3502 BUG_ON(!tpacpi_inputdev); 3503 BUG_ON(tpacpi_inputdev->open != NULL || 3504 tpacpi_inputdev->close != NULL); 3505 3506 TPACPI_ACPIHANDLE_INIT(hkey); 3507 mutex_init(&hotkey_mutex); 3508 3509 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3510 mutex_init(&hotkey_thread_data_mutex); 3511 #endif 3512 3513 /* hotkey not supported on 570 */ 3514 tp_features.hotkey = hkey_handle != NULL; 3515 3516 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3517 "hotkeys are %s\n", 3518 str_supported(tp_features.hotkey)); 3519 3520 if (!tp_features.hotkey) 3521 return 1; 3522 3523 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3524 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3525 3526 tpacpi_disable_brightness_delay(); 3527 3528 /* MUST have enough space for all attributes to be added to 3529 * hotkey_dev_attributes */ 3530 hotkey_dev_attributes = create_attr_set( 3531 ARRAY_SIZE(hotkey_attributes) + 2, 3532 NULL); 3533 if (!hotkey_dev_attributes) 3534 return -ENOMEM; 3535 res = add_many_to_attr_set(hotkey_dev_attributes, 3536 hotkey_attributes, 3537 ARRAY_SIZE(hotkey_attributes)); 3538 if (res) 3539 goto err_exit; 3540 3541 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3542 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3543 for HKEY interface version 0x100 */ 3544 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3545 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3546 "firmware HKEY interface version: 0x%x\n", 3547 hkeyv); 3548 3549 switch (hkeyv >> 8) { 3550 case 1: 3551 /* 3552 * MHKV 0x100 in A31, R40, R40e, 3553 * T4x, X31, and later 3554 */ 3555 3556 /* Paranoia check AND init hotkey_all_mask */ 3557 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3558 "MHKA", "qd")) { 3559 pr_err("missing MHKA handler, please report this to %s\n", 3560 TPACPI_MAIL); 3561 /* Fallback: pre-init for FN+F3,F4,F12 */ 3562 hotkey_all_mask = 0x080cU; 3563 } else { 3564 tp_features.hotkey_mask = 1; 3565 } 3566 break; 3567 3568 case 2: 3569 /* 3570 * MHKV 0x200 in X1, T460s, X260, T560, X1 Tablet (2016) 3571 */ 3572 3573 /* Paranoia check AND init hotkey_all_mask */ 3574 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3575 "MHKA", "dd", 1)) { 3576 pr_err("missing MHKA handler, please report this to %s\n", 3577 TPACPI_MAIL); 3578 /* Fallback: pre-init for FN+F3,F4,F12 */ 3579 hotkey_all_mask = 0x080cU; 3580 } else { 3581 tp_features.hotkey_mask = 1; 3582 } 3583 3584 /* 3585 * Check if we have an adaptive keyboard, like on the 3586 * Lenovo Carbon X1 2014 (2nd Gen). 3587 */ 3588 if (acpi_evalf(hkey_handle, &hotkey_adaptive_all_mask, 3589 "MHKA", "dd", 2)) { 3590 if (hotkey_adaptive_all_mask != 0) { 3591 tp_features.has_adaptive_kbd = true; 3592 res = sysfs_create_group( 3593 &tpacpi_pdev->dev.kobj, 3594 &adaptive_kbd_attr_group); 3595 if (res) 3596 goto err_exit; 3597 } 3598 } else { 3599 tp_features.has_adaptive_kbd = false; 3600 hotkey_adaptive_all_mask = 0x0U; 3601 } 3602 break; 3603 3604 default: 3605 pr_err("unknown version of the HKEY interface: 0x%x\n", 3606 hkeyv); 3607 pr_err("please report this to %s\n", TPACPI_MAIL); 3608 break; 3609 } 3610 } 3611 3612 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3613 "hotkey masks are %s\n", 3614 str_supported(tp_features.hotkey_mask)); 3615 3616 /* Init hotkey_all_mask if not initialized yet */ 3617 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3618 (quirks & TPACPI_HK_Q_INIMASK)) 3619 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3620 3621 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3622 if (tp_features.hotkey_mask) { 3623 /* hotkey_source_mask *must* be zero for 3624 * the first hotkey_mask_get to return hotkey_orig_mask */ 3625 res = hotkey_mask_get(); 3626 if (res) 3627 goto err_exit; 3628 3629 hotkey_orig_mask = hotkey_acpi_mask; 3630 } else { 3631 hotkey_orig_mask = hotkey_all_mask; 3632 hotkey_acpi_mask = hotkey_all_mask; 3633 } 3634 3635 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3636 if (dbg_wlswemul) { 3637 tp_features.hotkey_wlsw = 1; 3638 radiosw_state = !!tpacpi_wlsw_emulstate; 3639 pr_info("radio switch emulation enabled\n"); 3640 } else 3641 #endif 3642 /* Not all thinkpads have a hardware radio switch */ 3643 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3644 tp_features.hotkey_wlsw = 1; 3645 radiosw_state = !!status; 3646 pr_info("radio switch found; radios are %s\n", 3647 enabled(status, 0)); 3648 } 3649 if (tp_features.hotkey_wlsw) 3650 res = add_to_attr_set(hotkey_dev_attributes, 3651 &dev_attr_hotkey_radio_sw.attr); 3652 3653 res = hotkey_init_tablet_mode(); 3654 if (res < 0) 3655 goto err_exit; 3656 3657 tabletsw_state = res; 3658 3659 res = register_attr_set_with_sysfs(hotkey_dev_attributes, 3660 &tpacpi_pdev->dev.kobj); 3661 if (res) 3662 goto err_exit; 3663 3664 /* Set up key map */ 3665 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3666 GFP_KERNEL); 3667 if (!hotkey_keycode_map) { 3668 pr_err("failed to allocate memory for key map\n"); 3669 res = -ENOMEM; 3670 goto err_exit; 3671 } 3672 3673 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3674 ARRAY_SIZE(tpacpi_keymap_qtable)); 3675 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3676 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3677 "using keymap number %lu\n", keymap_id); 3678 3679 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3680 TPACPI_HOTKEY_MAP_SIZE); 3681 3682 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3683 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3684 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3685 tpacpi_inputdev->keycode = hotkey_keycode_map; 3686 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3687 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3688 input_set_capability(tpacpi_inputdev, EV_KEY, 3689 hotkey_keycode_map[i]); 3690 } else { 3691 if (i < sizeof(hotkey_reserved_mask)*8) 3692 hotkey_reserved_mask |= 1 << i; 3693 } 3694 } 3695 3696 if (tp_features.hotkey_wlsw) { 3697 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3698 input_report_switch(tpacpi_inputdev, 3699 SW_RFKILL_ALL, radiosw_state); 3700 } 3701 if (tp_features.hotkey_tablet) { 3702 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3703 input_report_switch(tpacpi_inputdev, 3704 SW_TABLET_MODE, tabletsw_state); 3705 } 3706 3707 /* Do not issue duplicate brightness change events to 3708 * userspace. tpacpi_detect_brightness_capabilities() must have 3709 * been called before this point */ 3710 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 3711 pr_info("This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver\n"); 3712 pr_notice("Disabling thinkpad-acpi brightness events by default...\n"); 3713 3714 /* Disable brightness up/down on Lenovo thinkpads when 3715 * ACPI is handling them, otherwise it is plain impossible 3716 * for userspace to do something even remotely sane */ 3717 hotkey_reserved_mask |= 3718 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3719 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3720 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3721 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3722 } 3723 3724 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3725 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3726 & ~hotkey_all_mask 3727 & ~hotkey_reserved_mask; 3728 3729 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3730 "hotkey source mask 0x%08x, polling freq %u\n", 3731 hotkey_source_mask, hotkey_poll_freq); 3732 #endif 3733 3734 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3735 "enabling firmware HKEY event interface...\n"); 3736 res = hotkey_status_set(true); 3737 if (res) { 3738 hotkey_exit(); 3739 return res; 3740 } 3741 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3742 | hotkey_driver_mask) 3743 & ~hotkey_source_mask); 3744 if (res < 0 && res != -ENXIO) { 3745 hotkey_exit(); 3746 return res; 3747 } 3748 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3749 & ~hotkey_reserved_mask; 3750 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3751 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3752 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3753 3754 tpacpi_inputdev->open = &hotkey_inputdev_open; 3755 tpacpi_inputdev->close = &hotkey_inputdev_close; 3756 3757 hotkey_poll_setup_safe(true); 3758 3759 return 0; 3760 3761 err_exit: 3762 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3763 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 3764 &adaptive_kbd_attr_group); 3765 3766 hotkey_dev_attributes = NULL; 3767 3768 return (res < 0) ? res : 1; 3769 } 3770 3771 /* Thinkpad X1 Carbon support 5 modes including Home mode, Web browser 3772 * mode, Web conference mode, Function mode and Lay-flat mode. 3773 * We support Home mode and Function mode currently. 3774 * 3775 * Will consider support rest of modes in future. 3776 * 3777 */ 3778 static const int adaptive_keyboard_modes[] = { 3779 HOME_MODE, 3780 /* WEB_BROWSER_MODE = 2, 3781 WEB_CONFERENCE_MODE = 3, */ 3782 FUNCTION_MODE 3783 }; 3784 3785 #define DFR_CHANGE_ROW 0x101 3786 #define DFR_SHOW_QUICKVIEW_ROW 0x102 3787 #define FIRST_ADAPTIVE_KEY 0x103 3788 3789 /* press Fn key a while second, it will switch to Function Mode. Then 3790 * release Fn key, previous mode be restored. 3791 */ 3792 static bool adaptive_keyboard_mode_is_saved; 3793 static int adaptive_keyboard_prev_mode; 3794 3795 static int adaptive_keyboard_get_mode(void) 3796 { 3797 int mode = 0; 3798 3799 if (!acpi_evalf(hkey_handle, &mode, "GTRW", "dd", 0)) { 3800 pr_err("Cannot read adaptive keyboard mode\n"); 3801 return -EIO; 3802 } 3803 3804 return mode; 3805 } 3806 3807 static int adaptive_keyboard_set_mode(int new_mode) 3808 { 3809 if (new_mode < 0 || 3810 new_mode > LAYFLAT_MODE) 3811 return -EINVAL; 3812 3813 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", new_mode)) { 3814 pr_err("Cannot set adaptive keyboard mode\n"); 3815 return -EIO; 3816 } 3817 3818 return 0; 3819 } 3820 3821 static int adaptive_keyboard_get_next_mode(int mode) 3822 { 3823 size_t i; 3824 size_t max_mode = ARRAY_SIZE(adaptive_keyboard_modes) - 1; 3825 3826 for (i = 0; i <= max_mode; i++) { 3827 if (adaptive_keyboard_modes[i] == mode) 3828 break; 3829 } 3830 3831 if (i >= max_mode) 3832 i = 0; 3833 else 3834 i++; 3835 3836 return adaptive_keyboard_modes[i]; 3837 } 3838 3839 static bool adaptive_keyboard_hotkey_notify_hotkey(unsigned int scancode) 3840 { 3841 int current_mode = 0; 3842 int new_mode = 0; 3843 int keycode; 3844 3845 switch (scancode) { 3846 case DFR_CHANGE_ROW: 3847 if (adaptive_keyboard_mode_is_saved) { 3848 new_mode = adaptive_keyboard_prev_mode; 3849 adaptive_keyboard_mode_is_saved = false; 3850 } else { 3851 current_mode = adaptive_keyboard_get_mode(); 3852 if (current_mode < 0) 3853 return false; 3854 new_mode = adaptive_keyboard_get_next_mode( 3855 current_mode); 3856 } 3857 3858 if (adaptive_keyboard_set_mode(new_mode) < 0) 3859 return false; 3860 3861 return true; 3862 3863 case DFR_SHOW_QUICKVIEW_ROW: 3864 current_mode = adaptive_keyboard_get_mode(); 3865 if (current_mode < 0) 3866 return false; 3867 3868 adaptive_keyboard_prev_mode = current_mode; 3869 adaptive_keyboard_mode_is_saved = true; 3870 3871 if (adaptive_keyboard_set_mode (FUNCTION_MODE) < 0) 3872 return false; 3873 return true; 3874 3875 default: 3876 if (scancode < FIRST_ADAPTIVE_KEY || 3877 scancode >= FIRST_ADAPTIVE_KEY + 3878 TP_ACPI_HOTKEYSCAN_EXTENDED_START - 3879 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3880 pr_info("Unhandled adaptive keyboard key: 0x%x\n", 3881 scancode); 3882 return false; 3883 } 3884 keycode = hotkey_keycode_map[scancode - FIRST_ADAPTIVE_KEY + 3885 TP_ACPI_HOTKEYSCAN_ADAPTIVE_START]; 3886 if (keycode != KEY_RESERVED) { 3887 mutex_lock(&tpacpi_inputdev_send_mutex); 3888 3889 input_report_key(tpacpi_inputdev, keycode, 1); 3890 input_sync(tpacpi_inputdev); 3891 3892 input_report_key(tpacpi_inputdev, keycode, 0); 3893 input_sync(tpacpi_inputdev); 3894 3895 mutex_unlock(&tpacpi_inputdev_send_mutex); 3896 } 3897 return true; 3898 } 3899 } 3900 3901 static bool hotkey_notify_hotkey(const u32 hkey, 3902 bool *send_acpi_ev, 3903 bool *ignore_acpi_ev) 3904 { 3905 /* 0x1000-0x1FFF: key presses */ 3906 unsigned int scancode = hkey & 0xfff; 3907 *send_acpi_ev = true; 3908 *ignore_acpi_ev = false; 3909 3910 /* 3911 * Original events are in the 0x10XX range, the adaptive keyboard 3912 * found in 2014 X1 Carbon emits events are of 0x11XX. In 2017 3913 * models, additional keys are emitted through 0x13XX. 3914 */ 3915 switch ((hkey >> 8) & 0xf) { 3916 case 0: 3917 if (scancode > 0 && 3918 scancode <= TP_ACPI_HOTKEYSCAN_ADAPTIVE_START) { 3919 /* HKEY event 0x1001 is scancode 0x00 */ 3920 scancode--; 3921 if (!(hotkey_source_mask & (1 << scancode))) { 3922 tpacpi_input_send_key_masked(scancode); 3923 *send_acpi_ev = false; 3924 } else { 3925 *ignore_acpi_ev = true; 3926 } 3927 return true; 3928 } 3929 break; 3930 3931 case 1: 3932 return adaptive_keyboard_hotkey_notify_hotkey(scancode); 3933 3934 case 3: 3935 /* Extended keycodes start at 0x300 and our offset into the map 3936 * TP_ACPI_HOTKEYSCAN_EXTENDED_START. The calculated scancode 3937 * will be positive, but might not be in the correct range. 3938 */ 3939 scancode -= (0x300 - TP_ACPI_HOTKEYSCAN_EXTENDED_START); 3940 if (scancode >= TP_ACPI_HOTKEYSCAN_EXTENDED_START && 3941 scancode < TPACPI_HOTKEY_MAP_LEN) { 3942 tpacpi_input_send_key(scancode); 3943 return true; 3944 } 3945 break; 3946 } 3947 3948 return false; 3949 } 3950 3951 static bool hotkey_notify_wakeup(const u32 hkey, 3952 bool *send_acpi_ev, 3953 bool *ignore_acpi_ev) 3954 { 3955 /* 0x2000-0x2FFF: Wakeup reason */ 3956 *send_acpi_ev = true; 3957 *ignore_acpi_ev = false; 3958 3959 switch (hkey) { 3960 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3961 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3962 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3963 *ignore_acpi_ev = true; 3964 break; 3965 3966 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3967 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3968 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3969 *ignore_acpi_ev = true; 3970 break; 3971 3972 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3973 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3974 pr_alert("EMERGENCY WAKEUP: battery almost empty\n"); 3975 /* how to auto-heal: */ 3976 /* 2313: woke up from S3, go to S4/S5 */ 3977 /* 2413: woke up from S4, go to S5 */ 3978 break; 3979 3980 default: 3981 return false; 3982 } 3983 3984 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3985 pr_info("woke up due to a hot-unplug request...\n"); 3986 hotkey_wakeup_reason_notify_change(); 3987 } 3988 return true; 3989 } 3990 3991 static bool hotkey_notify_dockevent(const u32 hkey, 3992 bool *send_acpi_ev, 3993 bool *ignore_acpi_ev) 3994 { 3995 /* 0x4000-0x4FFF: dock-related events */ 3996 *send_acpi_ev = true; 3997 *ignore_acpi_ev = false; 3998 3999 switch (hkey) { 4000 case TP_HKEY_EV_UNDOCK_ACK: 4001 /* ACPI undock operation completed after wakeup */ 4002 hotkey_autosleep_ack = 1; 4003 pr_info("undocked\n"); 4004 hotkey_wakeup_hotunplug_complete_notify_change(); 4005 return true; 4006 4007 case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */ 4008 pr_info("docked into hotplug port replicator\n"); 4009 return true; 4010 case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */ 4011 pr_info("undocked from hotplug port replicator\n"); 4012 return true; 4013 4014 default: 4015 return false; 4016 } 4017 } 4018 4019 static bool hotkey_notify_usrevent(const u32 hkey, 4020 bool *send_acpi_ev, 4021 bool *ignore_acpi_ev) 4022 { 4023 /* 0x5000-0x5FFF: human interface helpers */ 4024 *send_acpi_ev = true; 4025 *ignore_acpi_ev = false; 4026 4027 switch (hkey) { 4028 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 4029 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 4030 return true; 4031 4032 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 4033 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 4034 tpacpi_input_send_tabletsw(); 4035 hotkey_tablet_mode_notify_change(); 4036 *send_acpi_ev = false; 4037 return true; 4038 4039 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 4040 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 4041 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 4042 /* do not propagate these events */ 4043 *ignore_acpi_ev = true; 4044 return true; 4045 4046 default: 4047 return false; 4048 } 4049 } 4050 4051 static void thermal_dump_all_sensors(void); 4052 4053 static bool hotkey_notify_6xxx(const u32 hkey, 4054 bool *send_acpi_ev, 4055 bool *ignore_acpi_ev) 4056 { 4057 /* 0x6000-0x6FFF: thermal alarms/notices and keyboard events */ 4058 *send_acpi_ev = true; 4059 *ignore_acpi_ev = false; 4060 4061 switch (hkey) { 4062 case TP_HKEY_EV_THM_TABLE_CHANGED: 4063 pr_debug("EC reports: Thermal Table has changed\n"); 4064 /* recommended action: do nothing, we don't have 4065 * Lenovo ATM information */ 4066 return true; 4067 case TP_HKEY_EV_THM_CSM_COMPLETED: 4068 pr_debug("EC reports: Thermal Control Command set completed (DYTC)\n"); 4069 /* recommended action: do nothing, we don't have 4070 * Lenovo ATM information */ 4071 return true; 4072 case TP_HKEY_EV_THM_TRANSFM_CHANGED: 4073 pr_debug("EC reports: Thermal Transformation changed (GMTS)\n"); 4074 /* recommended action: do nothing, we don't have 4075 * Lenovo ATM information */ 4076 return true; 4077 case TP_HKEY_EV_ALARM_BAT_HOT: 4078 pr_crit("THERMAL ALARM: battery is too hot!\n"); 4079 /* recommended action: warn user through gui */ 4080 break; 4081 case TP_HKEY_EV_ALARM_BAT_XHOT: 4082 pr_alert("THERMAL EMERGENCY: battery is extremely hot!\n"); 4083 /* recommended action: immediate sleep/hibernate */ 4084 break; 4085 case TP_HKEY_EV_ALARM_SENSOR_HOT: 4086 pr_crit("THERMAL ALARM: a sensor reports something is too hot!\n"); 4087 /* recommended action: warn user through gui, that */ 4088 /* some internal component is too hot */ 4089 break; 4090 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 4091 pr_alert("THERMAL EMERGENCY: a sensor reports something is extremely hot!\n"); 4092 /* recommended action: immediate sleep/hibernate */ 4093 break; 4094 case TP_HKEY_EV_AC_CHANGED: 4095 /* X120e, X121e, X220, X220i, X220t, X230, T420, T420s, W520: 4096 * AC status changed; can be triggered by plugging or 4097 * unplugging AC adapter, docking or undocking. */ 4098 4099 /* fallthrough */ 4100 4101 case TP_HKEY_EV_KEY_NUMLOCK: 4102 case TP_HKEY_EV_KEY_FN: 4103 case TP_HKEY_EV_KEY_FN_ESC: 4104 /* key press events, we just ignore them as long as the EC 4105 * is still reporting them in the normal keyboard stream */ 4106 *send_acpi_ev = false; 4107 *ignore_acpi_ev = true; 4108 return true; 4109 4110 case TP_HKEY_EV_TABLET_CHANGED: 4111 tpacpi_input_send_tabletsw(); 4112 hotkey_tablet_mode_notify_change(); 4113 *send_acpi_ev = false; 4114 return true; 4115 4116 case TP_HKEY_EV_PALM_DETECTED: 4117 case TP_HKEY_EV_PALM_UNDETECTED: 4118 /* palm detected hovering the keyboard, forward to user-space 4119 * via netlink for consumption */ 4120 return true; 4121 4122 default: 4123 /* report simply as unknown, no sensor dump */ 4124 return false; 4125 } 4126 4127 thermal_dump_all_sensors(); 4128 return true; 4129 } 4130 4131 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 4132 { 4133 u32 hkey; 4134 bool send_acpi_ev; 4135 bool ignore_acpi_ev; 4136 bool known_ev; 4137 4138 if (event != 0x80) { 4139 pr_err("unknown HKEY notification event %d\n", event); 4140 /* forward it to userspace, maybe it knows how to handle it */ 4141 acpi_bus_generate_netlink_event( 4142 ibm->acpi->device->pnp.device_class, 4143 dev_name(&ibm->acpi->device->dev), 4144 event, 0); 4145 return; 4146 } 4147 4148 while (1) { 4149 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 4150 pr_err("failed to retrieve HKEY event\n"); 4151 return; 4152 } 4153 4154 if (hkey == 0) { 4155 /* queue empty */ 4156 return; 4157 } 4158 4159 send_acpi_ev = true; 4160 ignore_acpi_ev = false; 4161 4162 switch (hkey >> 12) { 4163 case 1: 4164 /* 0x1000-0x1FFF: key presses */ 4165 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 4166 &ignore_acpi_ev); 4167 break; 4168 case 2: 4169 /* 0x2000-0x2FFF: Wakeup reason */ 4170 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 4171 &ignore_acpi_ev); 4172 break; 4173 case 3: 4174 /* 0x3000-0x3FFF: bay-related wakeups */ 4175 switch (hkey) { 4176 case TP_HKEY_EV_BAYEJ_ACK: 4177 hotkey_autosleep_ack = 1; 4178 pr_info("bay ejected\n"); 4179 hotkey_wakeup_hotunplug_complete_notify_change(); 4180 known_ev = true; 4181 break; 4182 case TP_HKEY_EV_OPTDRV_EJ: 4183 /* FIXME: kick libata if SATA link offline */ 4184 known_ev = true; 4185 break; 4186 default: 4187 known_ev = false; 4188 } 4189 break; 4190 case 4: 4191 /* 0x4000-0x4FFF: dock-related events */ 4192 known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev, 4193 &ignore_acpi_ev); 4194 break; 4195 case 5: 4196 /* 0x5000-0x5FFF: human interface helpers */ 4197 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 4198 &ignore_acpi_ev); 4199 break; 4200 case 6: 4201 /* 0x6000-0x6FFF: thermal alarms/notices and 4202 * keyboard events */ 4203 known_ev = hotkey_notify_6xxx(hkey, &send_acpi_ev, 4204 &ignore_acpi_ev); 4205 break; 4206 case 7: 4207 /* 0x7000-0x7FFF: misc */ 4208 if (tp_features.hotkey_wlsw && 4209 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 4210 tpacpi_send_radiosw_update(); 4211 send_acpi_ev = 0; 4212 known_ev = true; 4213 break; 4214 } 4215 /* fallthrough - to default */ 4216 default: 4217 known_ev = false; 4218 } 4219 if (!known_ev) { 4220 pr_notice("unhandled HKEY event 0x%04x\n", hkey); 4221 pr_notice("please report the conditions when this event happened to %s\n", 4222 TPACPI_MAIL); 4223 } 4224 4225 /* netlink events */ 4226 if (!ignore_acpi_ev && send_acpi_ev) { 4227 acpi_bus_generate_netlink_event( 4228 ibm->acpi->device->pnp.device_class, 4229 dev_name(&ibm->acpi->device->dev), 4230 event, hkey); 4231 } 4232 } 4233 } 4234 4235 static void hotkey_suspend(void) 4236 { 4237 /* Do these on suspend, we get the events on early resume! */ 4238 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 4239 hotkey_autosleep_ack = 0; 4240 4241 /* save previous mode of adaptive keyboard of X1 Carbon */ 4242 if (tp_features.has_adaptive_kbd) { 4243 if (!acpi_evalf(hkey_handle, &adaptive_keyboard_prev_mode, 4244 "GTRW", "dd", 0)) { 4245 pr_err("Cannot read adaptive keyboard mode.\n"); 4246 } 4247 } 4248 } 4249 4250 static void hotkey_resume(void) 4251 { 4252 tpacpi_disable_brightness_delay(); 4253 4254 if (hotkey_status_set(true) < 0 || 4255 hotkey_mask_set(hotkey_acpi_mask) < 0) 4256 pr_err("error while attempting to reset the event firmware interface\n"); 4257 4258 tpacpi_send_radiosw_update(); 4259 hotkey_tablet_mode_notify_change(); 4260 hotkey_wakeup_reason_notify_change(); 4261 hotkey_wakeup_hotunplug_complete_notify_change(); 4262 hotkey_poll_setup_safe(false); 4263 4264 /* restore previous mode of adapive keyboard of X1 Carbon */ 4265 if (tp_features.has_adaptive_kbd) { 4266 if (!acpi_evalf(hkey_handle, NULL, "STRW", "vd", 4267 adaptive_keyboard_prev_mode)) { 4268 pr_err("Cannot set adaptive keyboard mode.\n"); 4269 } 4270 } 4271 } 4272 4273 /* procfs -------------------------------------------------------------- */ 4274 static int hotkey_read(struct seq_file *m) 4275 { 4276 int res, status; 4277 4278 if (!tp_features.hotkey) { 4279 seq_printf(m, "status:\t\tnot supported\n"); 4280 return 0; 4281 } 4282 4283 if (mutex_lock_killable(&hotkey_mutex)) 4284 return -ERESTARTSYS; 4285 res = hotkey_status_get(&status); 4286 if (!res) 4287 res = hotkey_mask_get(); 4288 mutex_unlock(&hotkey_mutex); 4289 if (res) 4290 return res; 4291 4292 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 4293 if (hotkey_all_mask) { 4294 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 4295 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 4296 } else { 4297 seq_printf(m, "mask:\t\tnot supported\n"); 4298 seq_printf(m, "commands:\tenable, disable, reset\n"); 4299 } 4300 4301 return 0; 4302 } 4303 4304 static void hotkey_enabledisable_warn(bool enable) 4305 { 4306 tpacpi_log_usertask("procfs hotkey enable/disable"); 4307 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 4308 pr_fmt("hotkey enable/disable functionality has been removed from the driver. Hotkeys are always enabled.\n"))) 4309 pr_err("Please remove the hotkey=enable module parameter, it is deprecated. Hotkeys are always enabled.\n"); 4310 } 4311 4312 static int hotkey_write(char *buf) 4313 { 4314 int res; 4315 u32 mask; 4316 char *cmd; 4317 4318 if (!tp_features.hotkey) 4319 return -ENODEV; 4320 4321 if (mutex_lock_killable(&hotkey_mutex)) 4322 return -ERESTARTSYS; 4323 4324 mask = hotkey_user_mask; 4325 4326 res = 0; 4327 while ((cmd = next_cmd(&buf))) { 4328 if (strlencmp(cmd, "enable") == 0) { 4329 hotkey_enabledisable_warn(1); 4330 } else if (strlencmp(cmd, "disable") == 0) { 4331 hotkey_enabledisable_warn(0); 4332 res = -EPERM; 4333 } else if (strlencmp(cmd, "reset") == 0) { 4334 mask = (hotkey_all_mask | hotkey_source_mask) 4335 & ~hotkey_reserved_mask; 4336 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 4337 /* mask set */ 4338 } else if (sscanf(cmd, "%x", &mask) == 1) { 4339 /* mask set */ 4340 } else { 4341 res = -EINVAL; 4342 goto errexit; 4343 } 4344 } 4345 4346 if (!res) { 4347 tpacpi_disclose_usertask("procfs hotkey", 4348 "set mask to 0x%08x\n", mask); 4349 res = hotkey_user_mask_set(mask); 4350 } 4351 4352 errexit: 4353 mutex_unlock(&hotkey_mutex); 4354 return res; 4355 } 4356 4357 static const struct acpi_device_id ibm_htk_device_ids[] = { 4358 {TPACPI_ACPI_IBM_HKEY_HID, 0}, 4359 {TPACPI_ACPI_LENOVO_HKEY_HID, 0}, 4360 {TPACPI_ACPI_LENOVO_HKEY_V2_HID, 0}, 4361 {"", 0}, 4362 }; 4363 4364 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 4365 .hid = ibm_htk_device_ids, 4366 .notify = hotkey_notify, 4367 .handle = &hkey_handle, 4368 .type = ACPI_DEVICE_NOTIFY, 4369 }; 4370 4371 static struct ibm_struct hotkey_driver_data = { 4372 .name = "hotkey", 4373 .read = hotkey_read, 4374 .write = hotkey_write, 4375 .exit = hotkey_exit, 4376 .resume = hotkey_resume, 4377 .suspend = hotkey_suspend, 4378 .acpi = &ibm_hotkey_acpidriver, 4379 }; 4380 4381 /************************************************************************* 4382 * Bluetooth subdriver 4383 */ 4384 4385 enum { 4386 /* ACPI GBDC/SBDC bits */ 4387 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 4388 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 4389 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 4390 0 = disable, 1 = enable */ 4391 }; 4392 4393 enum { 4394 /* ACPI \BLTH commands */ 4395 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 4396 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 4397 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 4398 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 4399 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 4400 }; 4401 4402 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 4403 4404 static int bluetooth_get_status(void) 4405 { 4406 int status; 4407 4408 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4409 if (dbg_bluetoothemul) 4410 return (tpacpi_bluetooth_emulstate) ? 4411 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4412 #endif 4413 4414 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 4415 return -EIO; 4416 4417 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 4418 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4419 } 4420 4421 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 4422 { 4423 int status; 4424 4425 vdbg_printk(TPACPI_DBG_RFKILL, 4426 "will attempt to %s bluetooth\n", 4427 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4428 4429 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4430 if (dbg_bluetoothemul) { 4431 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 4432 return 0; 4433 } 4434 #endif 4435 4436 if (state == TPACPI_RFK_RADIO_ON) 4437 status = TP_ACPI_BLUETOOTH_RADIOSSW 4438 | TP_ACPI_BLUETOOTH_RESUMECTRL; 4439 else 4440 status = 0; 4441 4442 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 4443 return -EIO; 4444 4445 return 0; 4446 } 4447 4448 /* sysfs bluetooth enable ---------------------------------------------- */ 4449 static ssize_t bluetooth_enable_show(struct device *dev, 4450 struct device_attribute *attr, 4451 char *buf) 4452 { 4453 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 4454 attr, buf); 4455 } 4456 4457 static ssize_t bluetooth_enable_store(struct device *dev, 4458 struct device_attribute *attr, 4459 const char *buf, size_t count) 4460 { 4461 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 4462 attr, buf, count); 4463 } 4464 4465 static DEVICE_ATTR_RW(bluetooth_enable); 4466 4467 /* --------------------------------------------------------------------- */ 4468 4469 static struct attribute *bluetooth_attributes[] = { 4470 &dev_attr_bluetooth_enable.attr, 4471 NULL 4472 }; 4473 4474 static const struct attribute_group bluetooth_attr_group = { 4475 .attrs = bluetooth_attributes, 4476 }; 4477 4478 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4479 .get_status = bluetooth_get_status, 4480 .set_status = bluetooth_set_status, 4481 }; 4482 4483 static void bluetooth_shutdown(void) 4484 { 4485 /* Order firmware to save current state to NVRAM */ 4486 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4487 TP_ACPI_BLTH_SAVE_STATE)) 4488 pr_notice("failed to save bluetooth state to NVRAM\n"); 4489 else 4490 vdbg_printk(TPACPI_DBG_RFKILL, 4491 "bluetooth state saved to NVRAM\n"); 4492 } 4493 4494 static void bluetooth_exit(void) 4495 { 4496 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4497 &bluetooth_attr_group); 4498 4499 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4500 4501 bluetooth_shutdown(); 4502 } 4503 4504 static const struct dmi_system_id bt_fwbug_list[] __initconst = { 4505 { 4506 .ident = "ThinkPad E485", 4507 .matches = { 4508 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4509 DMI_MATCH(DMI_BOARD_NAME, "20KU"), 4510 }, 4511 }, 4512 { 4513 .ident = "ThinkPad E585", 4514 .matches = { 4515 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4516 DMI_MATCH(DMI_BOARD_NAME, "20KV"), 4517 }, 4518 }, 4519 { 4520 .ident = "ThinkPad A285 - 20MW", 4521 .matches = { 4522 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4523 DMI_MATCH(DMI_BOARD_NAME, "20MW"), 4524 }, 4525 }, 4526 { 4527 .ident = "ThinkPad A285 - 20MX", 4528 .matches = { 4529 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4530 DMI_MATCH(DMI_BOARD_NAME, "20MX"), 4531 }, 4532 }, 4533 { 4534 .ident = "ThinkPad A485 - 20MU", 4535 .matches = { 4536 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4537 DMI_MATCH(DMI_BOARD_NAME, "20MU"), 4538 }, 4539 }, 4540 { 4541 .ident = "ThinkPad A485 - 20MV", 4542 .matches = { 4543 DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), 4544 DMI_MATCH(DMI_BOARD_NAME, "20MV"), 4545 }, 4546 }, 4547 {} 4548 }; 4549 4550 static const struct pci_device_id fwbug_cards_ids[] __initconst = { 4551 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24F3) }, 4552 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x24FD) }, 4553 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x2526) }, 4554 {} 4555 }; 4556 4557 4558 static int __init have_bt_fwbug(void) 4559 { 4560 /* 4561 * Some AMD based ThinkPads have a firmware bug that calling 4562 * "GBDC" will cause bluetooth on Intel wireless cards blocked 4563 */ 4564 if (dmi_check_system(bt_fwbug_list) && pci_dev_present(fwbug_cards_ids)) { 4565 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4566 FW_BUG "disable bluetooth subdriver for Intel cards\n"); 4567 return 1; 4568 } else 4569 return 0; 4570 } 4571 4572 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4573 { 4574 int res; 4575 int status = 0; 4576 4577 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4578 "initializing bluetooth subdriver\n"); 4579 4580 TPACPI_ACPIHANDLE_INIT(hkey); 4581 4582 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4583 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4584 tp_features.bluetooth = !have_bt_fwbug() && hkey_handle && 4585 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4586 4587 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4588 "bluetooth is %s, status 0x%02x\n", 4589 str_supported(tp_features.bluetooth), 4590 status); 4591 4592 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4593 if (dbg_bluetoothemul) { 4594 tp_features.bluetooth = 1; 4595 pr_info("bluetooth switch emulation enabled\n"); 4596 } else 4597 #endif 4598 if (tp_features.bluetooth && 4599 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4600 /* no bluetooth hardware present in system */ 4601 tp_features.bluetooth = 0; 4602 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4603 "bluetooth hardware not installed\n"); 4604 } 4605 4606 if (!tp_features.bluetooth) 4607 return 1; 4608 4609 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4610 &bluetooth_tprfk_ops, 4611 RFKILL_TYPE_BLUETOOTH, 4612 TPACPI_RFK_BLUETOOTH_SW_NAME, 4613 true); 4614 if (res) 4615 return res; 4616 4617 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4618 &bluetooth_attr_group); 4619 if (res) { 4620 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4621 return res; 4622 } 4623 4624 return 0; 4625 } 4626 4627 /* procfs -------------------------------------------------------------- */ 4628 static int bluetooth_read(struct seq_file *m) 4629 { 4630 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4631 } 4632 4633 static int bluetooth_write(char *buf) 4634 { 4635 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4636 } 4637 4638 static struct ibm_struct bluetooth_driver_data = { 4639 .name = "bluetooth", 4640 .read = bluetooth_read, 4641 .write = bluetooth_write, 4642 .exit = bluetooth_exit, 4643 .shutdown = bluetooth_shutdown, 4644 }; 4645 4646 /************************************************************************* 4647 * Wan subdriver 4648 */ 4649 4650 enum { 4651 /* ACPI GWAN/SWAN bits */ 4652 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4653 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4654 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4655 0 = disable, 1 = enable */ 4656 }; 4657 4658 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4659 4660 static int wan_get_status(void) 4661 { 4662 int status; 4663 4664 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4665 if (dbg_wwanemul) 4666 return (tpacpi_wwan_emulstate) ? 4667 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4668 #endif 4669 4670 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4671 return -EIO; 4672 4673 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4674 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4675 } 4676 4677 static int wan_set_status(enum tpacpi_rfkill_state state) 4678 { 4679 int status; 4680 4681 vdbg_printk(TPACPI_DBG_RFKILL, 4682 "will attempt to %s wwan\n", 4683 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4684 4685 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4686 if (dbg_wwanemul) { 4687 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4688 return 0; 4689 } 4690 #endif 4691 4692 if (state == TPACPI_RFK_RADIO_ON) 4693 status = TP_ACPI_WANCARD_RADIOSSW 4694 | TP_ACPI_WANCARD_RESUMECTRL; 4695 else 4696 status = 0; 4697 4698 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4699 return -EIO; 4700 4701 return 0; 4702 } 4703 4704 /* sysfs wan enable ---------------------------------------------------- */ 4705 static ssize_t wan_enable_show(struct device *dev, 4706 struct device_attribute *attr, 4707 char *buf) 4708 { 4709 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4710 attr, buf); 4711 } 4712 4713 static ssize_t wan_enable_store(struct device *dev, 4714 struct device_attribute *attr, 4715 const char *buf, size_t count) 4716 { 4717 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4718 attr, buf, count); 4719 } 4720 4721 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4722 wan_enable_show, wan_enable_store); 4723 4724 /* --------------------------------------------------------------------- */ 4725 4726 static struct attribute *wan_attributes[] = { 4727 &dev_attr_wwan_enable.attr, 4728 NULL 4729 }; 4730 4731 static const struct attribute_group wan_attr_group = { 4732 .attrs = wan_attributes, 4733 }; 4734 4735 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4736 .get_status = wan_get_status, 4737 .set_status = wan_set_status, 4738 }; 4739 4740 static void wan_shutdown(void) 4741 { 4742 /* Order firmware to save current state to NVRAM */ 4743 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4744 TP_ACPI_WGSV_SAVE_STATE)) 4745 pr_notice("failed to save WWAN state to NVRAM\n"); 4746 else 4747 vdbg_printk(TPACPI_DBG_RFKILL, 4748 "WWAN state saved to NVRAM\n"); 4749 } 4750 4751 static void wan_exit(void) 4752 { 4753 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4754 &wan_attr_group); 4755 4756 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4757 4758 wan_shutdown(); 4759 } 4760 4761 static int __init wan_init(struct ibm_init_struct *iibm) 4762 { 4763 int res; 4764 int status = 0; 4765 4766 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4767 "initializing wan subdriver\n"); 4768 4769 TPACPI_ACPIHANDLE_INIT(hkey); 4770 4771 tp_features.wan = hkey_handle && 4772 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4773 4774 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4775 "wan is %s, status 0x%02x\n", 4776 str_supported(tp_features.wan), 4777 status); 4778 4779 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4780 if (dbg_wwanemul) { 4781 tp_features.wan = 1; 4782 pr_info("wwan switch emulation enabled\n"); 4783 } else 4784 #endif 4785 if (tp_features.wan && 4786 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4787 /* no wan hardware present in system */ 4788 tp_features.wan = 0; 4789 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4790 "wan hardware not installed\n"); 4791 } 4792 4793 if (!tp_features.wan) 4794 return 1; 4795 4796 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4797 &wan_tprfk_ops, 4798 RFKILL_TYPE_WWAN, 4799 TPACPI_RFK_WWAN_SW_NAME, 4800 true); 4801 if (res) 4802 return res; 4803 4804 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4805 &wan_attr_group); 4806 4807 if (res) { 4808 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4809 return res; 4810 } 4811 4812 return 0; 4813 } 4814 4815 /* procfs -------------------------------------------------------------- */ 4816 static int wan_read(struct seq_file *m) 4817 { 4818 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4819 } 4820 4821 static int wan_write(char *buf) 4822 { 4823 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4824 } 4825 4826 static struct ibm_struct wan_driver_data = { 4827 .name = "wan", 4828 .read = wan_read, 4829 .write = wan_write, 4830 .exit = wan_exit, 4831 .shutdown = wan_shutdown, 4832 }; 4833 4834 /************************************************************************* 4835 * UWB subdriver 4836 */ 4837 4838 enum { 4839 /* ACPI GUWB/SUWB bits */ 4840 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4841 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4842 }; 4843 4844 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4845 4846 static int uwb_get_status(void) 4847 { 4848 int status; 4849 4850 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4851 if (dbg_uwbemul) 4852 return (tpacpi_uwb_emulstate) ? 4853 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4854 #endif 4855 4856 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4857 return -EIO; 4858 4859 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4860 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4861 } 4862 4863 static int uwb_set_status(enum tpacpi_rfkill_state state) 4864 { 4865 int status; 4866 4867 vdbg_printk(TPACPI_DBG_RFKILL, 4868 "will attempt to %s UWB\n", 4869 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4870 4871 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4872 if (dbg_uwbemul) { 4873 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4874 return 0; 4875 } 4876 #endif 4877 4878 if (state == TPACPI_RFK_RADIO_ON) 4879 status = TP_ACPI_UWB_RADIOSSW; 4880 else 4881 status = 0; 4882 4883 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4884 return -EIO; 4885 4886 return 0; 4887 } 4888 4889 /* --------------------------------------------------------------------- */ 4890 4891 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4892 .get_status = uwb_get_status, 4893 .set_status = uwb_set_status, 4894 }; 4895 4896 static void uwb_exit(void) 4897 { 4898 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4899 } 4900 4901 static int __init uwb_init(struct ibm_init_struct *iibm) 4902 { 4903 int res; 4904 int status = 0; 4905 4906 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4907 "initializing uwb subdriver\n"); 4908 4909 TPACPI_ACPIHANDLE_INIT(hkey); 4910 4911 tp_features.uwb = hkey_handle && 4912 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4913 4914 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4915 "uwb is %s, status 0x%02x\n", 4916 str_supported(tp_features.uwb), 4917 status); 4918 4919 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4920 if (dbg_uwbemul) { 4921 tp_features.uwb = 1; 4922 pr_info("uwb switch emulation enabled\n"); 4923 } else 4924 #endif 4925 if (tp_features.uwb && 4926 !(status & TP_ACPI_UWB_HWPRESENT)) { 4927 /* no uwb hardware present in system */ 4928 tp_features.uwb = 0; 4929 dbg_printk(TPACPI_DBG_INIT, 4930 "uwb hardware not installed\n"); 4931 } 4932 4933 if (!tp_features.uwb) 4934 return 1; 4935 4936 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4937 &uwb_tprfk_ops, 4938 RFKILL_TYPE_UWB, 4939 TPACPI_RFK_UWB_SW_NAME, 4940 false); 4941 return res; 4942 } 4943 4944 static struct ibm_struct uwb_driver_data = { 4945 .name = "uwb", 4946 .exit = uwb_exit, 4947 .flags.experimental = 1, 4948 }; 4949 4950 /************************************************************************* 4951 * Video subdriver 4952 */ 4953 4954 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4955 4956 enum video_access_mode { 4957 TPACPI_VIDEO_NONE = 0, 4958 TPACPI_VIDEO_570, /* 570 */ 4959 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4960 TPACPI_VIDEO_NEW, /* all others */ 4961 }; 4962 4963 enum { /* video status flags, based on VIDEO_570 */ 4964 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4965 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4966 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4967 }; 4968 4969 enum { /* TPACPI_VIDEO_570 constants */ 4970 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4971 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4972 * video_status_flags */ 4973 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4974 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4975 }; 4976 4977 static enum video_access_mode video_supported; 4978 static int video_orig_autosw; 4979 4980 static int video_autosw_get(void); 4981 static int video_autosw_set(int enable); 4982 4983 TPACPI_HANDLE(vid, root, 4984 "\\_SB.PCI.AGP.VGA", /* 570 */ 4985 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4986 "\\_SB.PCI0.VID0", /* 770e */ 4987 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4988 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4989 "\\_SB.PCI0.AGP.VID", /* all others */ 4990 ); /* R30, R31 */ 4991 4992 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4993 4994 static int __init video_init(struct ibm_init_struct *iibm) 4995 { 4996 int ivga; 4997 4998 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4999 5000 TPACPI_ACPIHANDLE_INIT(vid); 5001 if (tpacpi_is_ibm()) 5002 TPACPI_ACPIHANDLE_INIT(vid2); 5003 5004 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 5005 /* G41, assume IVGA doesn't change */ 5006 vid_handle = vid2_handle; 5007 5008 if (!vid_handle) 5009 /* video switching not supported on R30, R31 */ 5010 video_supported = TPACPI_VIDEO_NONE; 5011 else if (tpacpi_is_ibm() && 5012 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 5013 /* 570 */ 5014 video_supported = TPACPI_VIDEO_570; 5015 else if (tpacpi_is_ibm() && 5016 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 5017 /* 600e/x, 770e, 770x */ 5018 video_supported = TPACPI_VIDEO_770; 5019 else 5020 /* all others */ 5021 video_supported = TPACPI_VIDEO_NEW; 5022 5023 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 5024 str_supported(video_supported != TPACPI_VIDEO_NONE), 5025 video_supported); 5026 5027 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 5028 } 5029 5030 static void video_exit(void) 5031 { 5032 dbg_printk(TPACPI_DBG_EXIT, 5033 "restoring original video autoswitch mode\n"); 5034 if (video_autosw_set(video_orig_autosw)) 5035 pr_err("error while trying to restore original video autoswitch mode\n"); 5036 } 5037 5038 static int video_outputsw_get(void) 5039 { 5040 int status = 0; 5041 int i; 5042 5043 switch (video_supported) { 5044 case TPACPI_VIDEO_570: 5045 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 5046 TP_ACPI_VIDEO_570_PHSCMD)) 5047 return -EIO; 5048 status = i & TP_ACPI_VIDEO_570_PHSMASK; 5049 break; 5050 case TPACPI_VIDEO_770: 5051 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 5052 return -EIO; 5053 if (i) 5054 status |= TP_ACPI_VIDEO_S_LCD; 5055 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 5056 return -EIO; 5057 if (i) 5058 status |= TP_ACPI_VIDEO_S_CRT; 5059 break; 5060 case TPACPI_VIDEO_NEW: 5061 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 5062 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 5063 return -EIO; 5064 if (i) 5065 status |= TP_ACPI_VIDEO_S_CRT; 5066 5067 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 5068 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 5069 return -EIO; 5070 if (i) 5071 status |= TP_ACPI_VIDEO_S_LCD; 5072 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 5073 return -EIO; 5074 if (i) 5075 status |= TP_ACPI_VIDEO_S_DVI; 5076 break; 5077 default: 5078 return -ENOSYS; 5079 } 5080 5081 return status; 5082 } 5083 5084 static int video_outputsw_set(int status) 5085 { 5086 int autosw; 5087 int res = 0; 5088 5089 switch (video_supported) { 5090 case TPACPI_VIDEO_570: 5091 res = acpi_evalf(NULL, NULL, 5092 "\\_SB.PHS2", "vdd", 5093 TP_ACPI_VIDEO_570_PHS2CMD, 5094 status | TP_ACPI_VIDEO_570_PHS2SET); 5095 break; 5096 case TPACPI_VIDEO_770: 5097 autosw = video_autosw_get(); 5098 if (autosw < 0) 5099 return autosw; 5100 5101 res = video_autosw_set(1); 5102 if (res) 5103 return res; 5104 res = acpi_evalf(vid_handle, NULL, 5105 "ASWT", "vdd", status * 0x100, 0); 5106 if (!autosw && video_autosw_set(autosw)) { 5107 pr_err("video auto-switch left enabled due to error\n"); 5108 return -EIO; 5109 } 5110 break; 5111 case TPACPI_VIDEO_NEW: 5112 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 5113 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 5114 break; 5115 default: 5116 return -ENOSYS; 5117 } 5118 5119 return (res) ? 0 : -EIO; 5120 } 5121 5122 static int video_autosw_get(void) 5123 { 5124 int autosw = 0; 5125 5126 switch (video_supported) { 5127 case TPACPI_VIDEO_570: 5128 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 5129 return -EIO; 5130 break; 5131 case TPACPI_VIDEO_770: 5132 case TPACPI_VIDEO_NEW: 5133 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 5134 return -EIO; 5135 break; 5136 default: 5137 return -ENOSYS; 5138 } 5139 5140 return autosw & 1; 5141 } 5142 5143 static int video_autosw_set(int enable) 5144 { 5145 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 5146 return -EIO; 5147 return 0; 5148 } 5149 5150 static int video_outputsw_cycle(void) 5151 { 5152 int autosw = video_autosw_get(); 5153 int res; 5154 5155 if (autosw < 0) 5156 return autosw; 5157 5158 switch (video_supported) { 5159 case TPACPI_VIDEO_570: 5160 res = video_autosw_set(1); 5161 if (res) 5162 return res; 5163 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 5164 break; 5165 case TPACPI_VIDEO_770: 5166 case TPACPI_VIDEO_NEW: 5167 res = video_autosw_set(1); 5168 if (res) 5169 return res; 5170 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 5171 break; 5172 default: 5173 return -ENOSYS; 5174 } 5175 if (!autosw && video_autosw_set(autosw)) { 5176 pr_err("video auto-switch left enabled due to error\n"); 5177 return -EIO; 5178 } 5179 5180 return (res) ? 0 : -EIO; 5181 } 5182 5183 static int video_expand_toggle(void) 5184 { 5185 switch (video_supported) { 5186 case TPACPI_VIDEO_570: 5187 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 5188 0 : -EIO; 5189 case TPACPI_VIDEO_770: 5190 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 5191 0 : -EIO; 5192 case TPACPI_VIDEO_NEW: 5193 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 5194 0 : -EIO; 5195 default: 5196 return -ENOSYS; 5197 } 5198 /* not reached */ 5199 } 5200 5201 static int video_read(struct seq_file *m) 5202 { 5203 int status, autosw; 5204 5205 if (video_supported == TPACPI_VIDEO_NONE) { 5206 seq_printf(m, "status:\t\tnot supported\n"); 5207 return 0; 5208 } 5209 5210 /* Even reads can crash X.org, so... */ 5211 if (!capable(CAP_SYS_ADMIN)) 5212 return -EPERM; 5213 5214 status = video_outputsw_get(); 5215 if (status < 0) 5216 return status; 5217 5218 autosw = video_autosw_get(); 5219 if (autosw < 0) 5220 return autosw; 5221 5222 seq_printf(m, "status:\t\tsupported\n"); 5223 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 5224 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 5225 if (video_supported == TPACPI_VIDEO_NEW) 5226 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 5227 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 5228 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5229 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5230 if (video_supported == TPACPI_VIDEO_NEW) 5231 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5232 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5233 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5234 5235 return 0; 5236 } 5237 5238 static int video_write(char *buf) 5239 { 5240 char *cmd; 5241 int enable, disable, status; 5242 int res; 5243 5244 if (video_supported == TPACPI_VIDEO_NONE) 5245 return -ENODEV; 5246 5247 /* Even reads can crash X.org, let alone writes... */ 5248 if (!capable(CAP_SYS_ADMIN)) 5249 return -EPERM; 5250 5251 enable = 0; 5252 disable = 0; 5253 5254 while ((cmd = next_cmd(&buf))) { 5255 if (strlencmp(cmd, "lcd_enable") == 0) { 5256 enable |= TP_ACPI_VIDEO_S_LCD; 5257 } else if (strlencmp(cmd, "lcd_disable") == 0) { 5258 disable |= TP_ACPI_VIDEO_S_LCD; 5259 } else if (strlencmp(cmd, "crt_enable") == 0) { 5260 enable |= TP_ACPI_VIDEO_S_CRT; 5261 } else if (strlencmp(cmd, "crt_disable") == 0) { 5262 disable |= TP_ACPI_VIDEO_S_CRT; 5263 } else if (video_supported == TPACPI_VIDEO_NEW && 5264 strlencmp(cmd, "dvi_enable") == 0) { 5265 enable |= TP_ACPI_VIDEO_S_DVI; 5266 } else if (video_supported == TPACPI_VIDEO_NEW && 5267 strlencmp(cmd, "dvi_disable") == 0) { 5268 disable |= TP_ACPI_VIDEO_S_DVI; 5269 } else if (strlencmp(cmd, "auto_enable") == 0) { 5270 res = video_autosw_set(1); 5271 if (res) 5272 return res; 5273 } else if (strlencmp(cmd, "auto_disable") == 0) { 5274 res = video_autosw_set(0); 5275 if (res) 5276 return res; 5277 } else if (strlencmp(cmd, "video_switch") == 0) { 5278 res = video_outputsw_cycle(); 5279 if (res) 5280 return res; 5281 } else if (strlencmp(cmd, "expand_toggle") == 0) { 5282 res = video_expand_toggle(); 5283 if (res) 5284 return res; 5285 } else 5286 return -EINVAL; 5287 } 5288 5289 if (enable || disable) { 5290 status = video_outputsw_get(); 5291 if (status < 0) 5292 return status; 5293 res = video_outputsw_set((status & ~disable) | enable); 5294 if (res) 5295 return res; 5296 } 5297 5298 return 0; 5299 } 5300 5301 static struct ibm_struct video_driver_data = { 5302 .name = "video", 5303 .read = video_read, 5304 .write = video_write, 5305 .exit = video_exit, 5306 }; 5307 5308 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5309 5310 /************************************************************************* 5311 * Keyboard backlight subdriver 5312 */ 5313 5314 static enum led_brightness kbdlight_brightness; 5315 static DEFINE_MUTEX(kbdlight_mutex); 5316 5317 static int kbdlight_set_level(int level) 5318 { 5319 int ret = 0; 5320 5321 if (!hkey_handle) 5322 return -ENXIO; 5323 5324 mutex_lock(&kbdlight_mutex); 5325 5326 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5327 ret = -EIO; 5328 else 5329 kbdlight_brightness = level; 5330 5331 mutex_unlock(&kbdlight_mutex); 5332 5333 return ret; 5334 } 5335 5336 static int kbdlight_get_level(void) 5337 { 5338 int status = 0; 5339 5340 if (!hkey_handle) 5341 return -ENXIO; 5342 5343 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5344 return -EIO; 5345 5346 if (status < 0) 5347 return status; 5348 5349 return status & 0x3; 5350 } 5351 5352 static bool kbdlight_is_supported(void) 5353 { 5354 int status = 0; 5355 5356 if (!hkey_handle) 5357 return false; 5358 5359 if (!acpi_has_method(hkey_handle, "MLCG")) { 5360 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5361 return false; 5362 } 5363 5364 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5365 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5366 return false; 5367 } 5368 5369 if (status < 0) { 5370 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5371 return false; 5372 } 5373 5374 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5375 /* 5376 * Guessed test for keyboard backlight: 5377 * 5378 * Machines with backlight keyboard return: 5379 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5380 * b110100010010000000XX - ThinkPad x230 5381 * b010100000010000000XX - ThinkPad x240 5382 * b010100000010000000XX - ThinkPad W541 5383 * (XX is current backlight level) 5384 * 5385 * Machines without backlight keyboard return: 5386 * b10100001000000000000 - ThinkPad x230 5387 * b10110001000000000000 - ThinkPad E430 5388 * b00000000000000000000 - ThinkPad E450 5389 * 5390 * Candidate BITs for detection test (XOR): 5391 * b01000000001000000000 5392 * ^ 5393 */ 5394 return status & BIT(9); 5395 } 5396 5397 static int kbdlight_sysfs_set(struct led_classdev *led_cdev, 5398 enum led_brightness brightness) 5399 { 5400 return kbdlight_set_level(brightness); 5401 } 5402 5403 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5404 { 5405 int level; 5406 5407 level = kbdlight_get_level(); 5408 if (level < 0) 5409 return 0; 5410 5411 return level; 5412 } 5413 5414 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5415 .led_classdev = { 5416 .name = "tpacpi::kbd_backlight", 5417 .max_brightness = 2, 5418 .flags = LED_BRIGHT_HW_CHANGED, 5419 .brightness_set_blocking = &kbdlight_sysfs_set, 5420 .brightness_get = &kbdlight_sysfs_get, 5421 } 5422 }; 5423 5424 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5425 { 5426 int rc; 5427 5428 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5429 5430 TPACPI_ACPIHANDLE_INIT(hkey); 5431 5432 if (!kbdlight_is_supported()) { 5433 tp_features.kbdlight = 0; 5434 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5435 return 1; 5436 } 5437 5438 kbdlight_brightness = kbdlight_sysfs_get(NULL); 5439 tp_features.kbdlight = 1; 5440 5441 rc = led_classdev_register(&tpacpi_pdev->dev, 5442 &tpacpi_led_kbdlight.led_classdev); 5443 if (rc < 0) { 5444 tp_features.kbdlight = 0; 5445 return rc; 5446 } 5447 5448 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask | 5449 TP_ACPI_HKEY_KBD_LIGHT_MASK); 5450 return 0; 5451 } 5452 5453 static void kbdlight_exit(void) 5454 { 5455 if (tp_features.kbdlight) 5456 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5457 } 5458 5459 static int kbdlight_set_level_and_update(int level) 5460 { 5461 int ret; 5462 struct led_classdev *led_cdev; 5463 5464 ret = kbdlight_set_level(level); 5465 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5466 5467 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5468 led_cdev->brightness = level; 5469 5470 return ret; 5471 } 5472 5473 static int kbdlight_read(struct seq_file *m) 5474 { 5475 int level; 5476 5477 if (!tp_features.kbdlight) { 5478 seq_printf(m, "status:\t\tnot supported\n"); 5479 } else { 5480 level = kbdlight_get_level(); 5481 if (level < 0) 5482 seq_printf(m, "status:\t\terror %d\n", level); 5483 else 5484 seq_printf(m, "status:\t\t%d\n", level); 5485 seq_printf(m, "commands:\t0, 1, 2\n"); 5486 } 5487 5488 return 0; 5489 } 5490 5491 static int kbdlight_write(char *buf) 5492 { 5493 char *cmd; 5494 int level = -1; 5495 5496 if (!tp_features.kbdlight) 5497 return -ENODEV; 5498 5499 while ((cmd = next_cmd(&buf))) { 5500 if (strlencmp(cmd, "0") == 0) 5501 level = 0; 5502 else if (strlencmp(cmd, "1") == 0) 5503 level = 1; 5504 else if (strlencmp(cmd, "2") == 0) 5505 level = 2; 5506 else 5507 return -EINVAL; 5508 } 5509 5510 if (level == -1) 5511 return -EINVAL; 5512 5513 return kbdlight_set_level_and_update(level); 5514 } 5515 5516 static void kbdlight_suspend(void) 5517 { 5518 struct led_classdev *led_cdev; 5519 5520 if (!tp_features.kbdlight) 5521 return; 5522 5523 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5524 led_update_brightness(led_cdev); 5525 led_classdev_suspend(led_cdev); 5526 } 5527 5528 static void kbdlight_resume(void) 5529 { 5530 if (!tp_features.kbdlight) 5531 return; 5532 5533 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5534 } 5535 5536 static struct ibm_struct kbdlight_driver_data = { 5537 .name = "kbdlight", 5538 .read = kbdlight_read, 5539 .write = kbdlight_write, 5540 .suspend = kbdlight_suspend, 5541 .resume = kbdlight_resume, 5542 .exit = kbdlight_exit, 5543 }; 5544 5545 /************************************************************************* 5546 * Light (thinklight) subdriver 5547 */ 5548 5549 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5550 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5551 5552 static int light_get_status(void) 5553 { 5554 int status = 0; 5555 5556 if (tp_features.light_status) { 5557 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5558 return -EIO; 5559 return (!!status); 5560 } 5561 5562 return -ENXIO; 5563 } 5564 5565 static int light_set_status(int status) 5566 { 5567 int rc; 5568 5569 if (tp_features.light) { 5570 if (cmos_handle) { 5571 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5572 (status) ? 5573 TP_CMOS_THINKLIGHT_ON : 5574 TP_CMOS_THINKLIGHT_OFF); 5575 } else { 5576 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5577 (status) ? 1 : 0); 5578 } 5579 return (rc) ? 0 : -EIO; 5580 } 5581 5582 return -ENXIO; 5583 } 5584 5585 static int light_sysfs_set(struct led_classdev *led_cdev, 5586 enum led_brightness brightness) 5587 { 5588 return light_set_status((brightness != LED_OFF) ? 5589 TPACPI_LED_ON : TPACPI_LED_OFF); 5590 } 5591 5592 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5593 { 5594 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5595 } 5596 5597 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5598 .led_classdev = { 5599 .name = "tpacpi::thinklight", 5600 .brightness_set_blocking = &light_sysfs_set, 5601 .brightness_get = &light_sysfs_get, 5602 } 5603 }; 5604 5605 static int __init light_init(struct ibm_init_struct *iibm) 5606 { 5607 int rc; 5608 5609 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5610 5611 if (tpacpi_is_ibm()) { 5612 TPACPI_ACPIHANDLE_INIT(ledb); 5613 TPACPI_ACPIHANDLE_INIT(lght); 5614 } 5615 TPACPI_ACPIHANDLE_INIT(cmos); 5616 5617 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5618 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5619 5620 if (tp_features.light) 5621 /* light status not supported on 5622 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5623 tp_features.light_status = 5624 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5625 5626 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5627 str_supported(tp_features.light), 5628 str_supported(tp_features.light_status)); 5629 5630 if (!tp_features.light) 5631 return 1; 5632 5633 rc = led_classdev_register(&tpacpi_pdev->dev, 5634 &tpacpi_led_thinklight.led_classdev); 5635 5636 if (rc < 0) { 5637 tp_features.light = 0; 5638 tp_features.light_status = 0; 5639 } else { 5640 rc = 0; 5641 } 5642 5643 return rc; 5644 } 5645 5646 static void light_exit(void) 5647 { 5648 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5649 } 5650 5651 static int light_read(struct seq_file *m) 5652 { 5653 int status; 5654 5655 if (!tp_features.light) { 5656 seq_printf(m, "status:\t\tnot supported\n"); 5657 } else if (!tp_features.light_status) { 5658 seq_printf(m, "status:\t\tunknown\n"); 5659 seq_printf(m, "commands:\ton, off\n"); 5660 } else { 5661 status = light_get_status(); 5662 if (status < 0) 5663 return status; 5664 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5665 seq_printf(m, "commands:\ton, off\n"); 5666 } 5667 5668 return 0; 5669 } 5670 5671 static int light_write(char *buf) 5672 { 5673 char *cmd; 5674 int newstatus = 0; 5675 5676 if (!tp_features.light) 5677 return -ENODEV; 5678 5679 while ((cmd = next_cmd(&buf))) { 5680 if (strlencmp(cmd, "on") == 0) { 5681 newstatus = 1; 5682 } else if (strlencmp(cmd, "off") == 0) { 5683 newstatus = 0; 5684 } else 5685 return -EINVAL; 5686 } 5687 5688 return light_set_status(newstatus); 5689 } 5690 5691 static struct ibm_struct light_driver_data = { 5692 .name = "light", 5693 .read = light_read, 5694 .write = light_write, 5695 .exit = light_exit, 5696 }; 5697 5698 /************************************************************************* 5699 * CMOS subdriver 5700 */ 5701 5702 /* sysfs cmos_command -------------------------------------------------- */ 5703 static ssize_t cmos_command_store(struct device *dev, 5704 struct device_attribute *attr, 5705 const char *buf, size_t count) 5706 { 5707 unsigned long cmos_cmd; 5708 int res; 5709 5710 if (parse_strtoul(buf, 21, &cmos_cmd)) 5711 return -EINVAL; 5712 5713 res = issue_thinkpad_cmos_command(cmos_cmd); 5714 return (res) ? res : count; 5715 } 5716 5717 static DEVICE_ATTR_WO(cmos_command); 5718 5719 /* --------------------------------------------------------------------- */ 5720 5721 static int __init cmos_init(struct ibm_init_struct *iibm) 5722 { 5723 int res; 5724 5725 vdbg_printk(TPACPI_DBG_INIT, 5726 "initializing cmos commands subdriver\n"); 5727 5728 TPACPI_ACPIHANDLE_INIT(cmos); 5729 5730 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5731 str_supported(cmos_handle != NULL)); 5732 5733 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5734 if (res) 5735 return res; 5736 5737 return (cmos_handle) ? 0 : 1; 5738 } 5739 5740 static void cmos_exit(void) 5741 { 5742 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5743 } 5744 5745 static int cmos_read(struct seq_file *m) 5746 { 5747 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5748 R30, R31, T20-22, X20-21 */ 5749 if (!cmos_handle) 5750 seq_printf(m, "status:\t\tnot supported\n"); 5751 else { 5752 seq_printf(m, "status:\t\tsupported\n"); 5753 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5754 } 5755 5756 return 0; 5757 } 5758 5759 static int cmos_write(char *buf) 5760 { 5761 char *cmd; 5762 int cmos_cmd, res; 5763 5764 while ((cmd = next_cmd(&buf))) { 5765 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5766 cmos_cmd >= 0 && cmos_cmd <= 21) { 5767 /* cmos_cmd set */ 5768 } else 5769 return -EINVAL; 5770 5771 res = issue_thinkpad_cmos_command(cmos_cmd); 5772 if (res) 5773 return res; 5774 } 5775 5776 return 0; 5777 } 5778 5779 static struct ibm_struct cmos_driver_data = { 5780 .name = "cmos", 5781 .read = cmos_read, 5782 .write = cmos_write, 5783 .exit = cmos_exit, 5784 }; 5785 5786 /************************************************************************* 5787 * LED subdriver 5788 */ 5789 5790 enum led_access_mode { 5791 TPACPI_LED_NONE = 0, 5792 TPACPI_LED_570, /* 570 */ 5793 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5794 TPACPI_LED_NEW, /* all others */ 5795 }; 5796 5797 enum { /* For TPACPI_LED_OLD */ 5798 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5799 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5800 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5801 }; 5802 5803 static enum led_access_mode led_supported; 5804 5805 static acpi_handle led_handle; 5806 5807 #define TPACPI_LED_NUMLEDS 16 5808 static struct tpacpi_led_classdev *tpacpi_leds; 5809 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5810 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5811 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5812 "tpacpi::power", 5813 "tpacpi:orange:batt", 5814 "tpacpi:green:batt", 5815 "tpacpi::dock_active", 5816 "tpacpi::bay_active", 5817 "tpacpi::dock_batt", 5818 "tpacpi::unknown_led", 5819 "tpacpi::standby", 5820 "tpacpi::dock_status1", 5821 "tpacpi::dock_status2", 5822 "tpacpi::unknown_led2", 5823 "tpacpi::unknown_led3", 5824 "tpacpi::thinkvantage", 5825 }; 5826 #define TPACPI_SAFE_LEDS 0x1081U 5827 5828 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5829 { 5830 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5831 return false; 5832 #else 5833 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5834 #endif 5835 } 5836 5837 static int led_get_status(const unsigned int led) 5838 { 5839 int status; 5840 enum led_status_t led_s; 5841 5842 switch (led_supported) { 5843 case TPACPI_LED_570: 5844 if (!acpi_evalf(ec_handle, 5845 &status, "GLED", "dd", 1 << led)) 5846 return -EIO; 5847 led_s = (status == 0) ? 5848 TPACPI_LED_OFF : 5849 ((status == 1) ? 5850 TPACPI_LED_ON : 5851 TPACPI_LED_BLINK); 5852 tpacpi_led_state_cache[led] = led_s; 5853 return led_s; 5854 default: 5855 return -ENXIO; 5856 } 5857 5858 /* not reached */ 5859 } 5860 5861 static int led_set_status(const unsigned int led, 5862 const enum led_status_t ledstatus) 5863 { 5864 /* off, on, blink. Index is led_status_t */ 5865 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5866 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5867 5868 int rc = 0; 5869 5870 switch (led_supported) { 5871 case TPACPI_LED_570: 5872 /* 570 */ 5873 if (unlikely(led > 7)) 5874 return -EINVAL; 5875 if (unlikely(tpacpi_is_led_restricted(led))) 5876 return -EPERM; 5877 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5878 (1 << led), led_sled_arg1[ledstatus])) 5879 return -EIO; 5880 break; 5881 case TPACPI_LED_OLD: 5882 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5883 if (unlikely(led > 7)) 5884 return -EINVAL; 5885 if (unlikely(tpacpi_is_led_restricted(led))) 5886 return -EPERM; 5887 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5888 if (rc >= 0) 5889 rc = ec_write(TPACPI_LED_EC_HLBL, 5890 (ledstatus == TPACPI_LED_BLINK) << led); 5891 if (rc >= 0) 5892 rc = ec_write(TPACPI_LED_EC_HLCL, 5893 (ledstatus != TPACPI_LED_OFF) << led); 5894 break; 5895 case TPACPI_LED_NEW: 5896 /* all others */ 5897 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5898 return -EINVAL; 5899 if (unlikely(tpacpi_is_led_restricted(led))) 5900 return -EPERM; 5901 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5902 led, led_led_arg1[ledstatus])) 5903 return -EIO; 5904 break; 5905 default: 5906 return -ENXIO; 5907 } 5908 5909 if (!rc) 5910 tpacpi_led_state_cache[led] = ledstatus; 5911 5912 return rc; 5913 } 5914 5915 static int led_sysfs_set(struct led_classdev *led_cdev, 5916 enum led_brightness brightness) 5917 { 5918 struct tpacpi_led_classdev *data = container_of(led_cdev, 5919 struct tpacpi_led_classdev, led_classdev); 5920 enum led_status_t new_state; 5921 5922 if (brightness == LED_OFF) 5923 new_state = TPACPI_LED_OFF; 5924 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5925 new_state = TPACPI_LED_ON; 5926 else 5927 new_state = TPACPI_LED_BLINK; 5928 5929 return led_set_status(data->led, new_state); 5930 } 5931 5932 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5933 unsigned long *delay_on, unsigned long *delay_off) 5934 { 5935 struct tpacpi_led_classdev *data = container_of(led_cdev, 5936 struct tpacpi_led_classdev, led_classdev); 5937 5938 /* Can we choose the flash rate? */ 5939 if (*delay_on == 0 && *delay_off == 0) { 5940 /* yes. set them to the hardware blink rate (1 Hz) */ 5941 *delay_on = 500; /* ms */ 5942 *delay_off = 500; /* ms */ 5943 } else if ((*delay_on != 500) || (*delay_off != 500)) 5944 return -EINVAL; 5945 5946 return led_set_status(data->led, TPACPI_LED_BLINK); 5947 } 5948 5949 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5950 { 5951 int rc; 5952 5953 struct tpacpi_led_classdev *data = container_of(led_cdev, 5954 struct tpacpi_led_classdev, led_classdev); 5955 5956 rc = led_get_status(data->led); 5957 5958 if (rc == TPACPI_LED_OFF || rc < 0) 5959 rc = LED_OFF; /* no error handling in led class :( */ 5960 else 5961 rc = LED_FULL; 5962 5963 return rc; 5964 } 5965 5966 static void led_exit(void) 5967 { 5968 unsigned int i; 5969 5970 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5971 if (tpacpi_leds[i].led_classdev.name) 5972 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5973 } 5974 5975 kfree(tpacpi_leds); 5976 } 5977 5978 static int __init tpacpi_init_led(unsigned int led) 5979 { 5980 int rc; 5981 5982 tpacpi_leds[led].led = led; 5983 5984 /* LEDs with no name don't get registered */ 5985 if (!tpacpi_led_names[led]) 5986 return 0; 5987 5988 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set; 5989 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5990 if (led_supported == TPACPI_LED_570) 5991 tpacpi_leds[led].led_classdev.brightness_get = 5992 &led_sysfs_get; 5993 5994 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5995 5996 rc = led_classdev_register(&tpacpi_pdev->dev, 5997 &tpacpi_leds[led].led_classdev); 5998 if (rc < 0) 5999 tpacpi_leds[led].led_classdev.name = NULL; 6000 6001 return rc; 6002 } 6003 6004 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 6005 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 6006 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 6007 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 6008 6009 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 6010 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 6011 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 6012 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 6013 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 6014 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 6015 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 6016 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 6017 6018 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 6019 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 6020 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 6021 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 6022 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 6023 6024 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 6025 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 6026 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 6027 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 6028 6029 /* (1) - may have excess leds enabled on MSB */ 6030 6031 /* Defaults (order matters, keep last, don't reorder!) */ 6032 { /* Lenovo */ 6033 .vendor = PCI_VENDOR_ID_LENOVO, 6034 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 6035 .quirks = 0x1fffU, 6036 }, 6037 { /* IBM ThinkPads with no EC version string */ 6038 .vendor = PCI_VENDOR_ID_IBM, 6039 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 6040 .quirks = 0x00ffU, 6041 }, 6042 { /* IBM ThinkPads with EC version string */ 6043 .vendor = PCI_VENDOR_ID_IBM, 6044 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 6045 .quirks = 0x00bfU, 6046 }, 6047 }; 6048 6049 static enum led_access_mode __init led_init_detect_mode(void) 6050 { 6051 acpi_status status; 6052 6053 if (tpacpi_is_ibm()) { 6054 /* 570 */ 6055 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 6056 if (ACPI_SUCCESS(status)) 6057 return TPACPI_LED_570; 6058 6059 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 6060 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 6061 if (ACPI_SUCCESS(status)) 6062 return TPACPI_LED_OLD; 6063 } 6064 6065 /* most others */ 6066 status = acpi_get_handle(ec_handle, "LED", &led_handle); 6067 if (ACPI_SUCCESS(status)) 6068 return TPACPI_LED_NEW; 6069 6070 /* R30, R31, and unknown firmwares */ 6071 led_handle = NULL; 6072 return TPACPI_LED_NONE; 6073 } 6074 6075 static int __init led_init(struct ibm_init_struct *iibm) 6076 { 6077 unsigned int i; 6078 int rc; 6079 unsigned long useful_leds; 6080 6081 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 6082 6083 led_supported = led_init_detect_mode(); 6084 6085 if (led_supported != TPACPI_LED_NONE) { 6086 useful_leds = tpacpi_check_quirks(led_useful_qtable, 6087 ARRAY_SIZE(led_useful_qtable)); 6088 6089 if (!useful_leds) { 6090 led_handle = NULL; 6091 led_supported = TPACPI_LED_NONE; 6092 } 6093 } 6094 6095 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 6096 str_supported(led_supported), led_supported); 6097 6098 if (led_supported == TPACPI_LED_NONE) 6099 return 1; 6100 6101 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds), 6102 GFP_KERNEL); 6103 if (!tpacpi_leds) { 6104 pr_err("Out of memory for LED data\n"); 6105 return -ENOMEM; 6106 } 6107 6108 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 6109 tpacpi_leds[i].led = -1; 6110 6111 if (!tpacpi_is_led_restricted(i) && 6112 test_bit(i, &useful_leds)) { 6113 rc = tpacpi_init_led(i); 6114 if (rc < 0) { 6115 led_exit(); 6116 return rc; 6117 } 6118 } 6119 } 6120 6121 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 6122 pr_notice("warning: userspace override of important firmware LEDs is enabled\n"); 6123 #endif 6124 return 0; 6125 } 6126 6127 #define str_led_status(s) \ 6128 ((s) == TPACPI_LED_OFF ? "off" : \ 6129 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 6130 6131 static int led_read(struct seq_file *m) 6132 { 6133 if (!led_supported) { 6134 seq_printf(m, "status:\t\tnot supported\n"); 6135 return 0; 6136 } 6137 seq_printf(m, "status:\t\tsupported\n"); 6138 6139 if (led_supported == TPACPI_LED_570) { 6140 /* 570 */ 6141 int i, status; 6142 for (i = 0; i < 8; i++) { 6143 status = led_get_status(i); 6144 if (status < 0) 6145 return -EIO; 6146 seq_printf(m, "%d:\t\t%s\n", 6147 i, str_led_status(status)); 6148 } 6149 } 6150 6151 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 6152 6153 return 0; 6154 } 6155 6156 static int led_write(char *buf) 6157 { 6158 char *cmd; 6159 int led, rc; 6160 enum led_status_t s; 6161 6162 if (!led_supported) 6163 return -ENODEV; 6164 6165 while ((cmd = next_cmd(&buf))) { 6166 if (sscanf(cmd, "%d", &led) != 1) 6167 return -EINVAL; 6168 6169 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 6170 tpacpi_leds[led].led < 0) 6171 return -ENODEV; 6172 6173 if (strstr(cmd, "off")) { 6174 s = TPACPI_LED_OFF; 6175 } else if (strstr(cmd, "on")) { 6176 s = TPACPI_LED_ON; 6177 } else if (strstr(cmd, "blink")) { 6178 s = TPACPI_LED_BLINK; 6179 } else { 6180 return -EINVAL; 6181 } 6182 6183 rc = led_set_status(led, s); 6184 if (rc < 0) 6185 return rc; 6186 } 6187 6188 return 0; 6189 } 6190 6191 static struct ibm_struct led_driver_data = { 6192 .name = "led", 6193 .read = led_read, 6194 .write = led_write, 6195 .exit = led_exit, 6196 }; 6197 6198 /************************************************************************* 6199 * Beep subdriver 6200 */ 6201 6202 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 6203 6204 #define TPACPI_BEEP_Q1 0x0001 6205 6206 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 6207 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 6208 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 6209 }; 6210 6211 static int __init beep_init(struct ibm_init_struct *iibm) 6212 { 6213 unsigned long quirks; 6214 6215 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 6216 6217 TPACPI_ACPIHANDLE_INIT(beep); 6218 6219 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 6220 str_supported(beep_handle != NULL)); 6221 6222 quirks = tpacpi_check_quirks(beep_quirk_table, 6223 ARRAY_SIZE(beep_quirk_table)); 6224 6225 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6226 6227 return (beep_handle) ? 0 : 1; 6228 } 6229 6230 static int beep_read(struct seq_file *m) 6231 { 6232 if (!beep_handle) 6233 seq_printf(m, "status:\t\tnot supported\n"); 6234 else { 6235 seq_printf(m, "status:\t\tsupported\n"); 6236 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6237 } 6238 6239 return 0; 6240 } 6241 6242 static int beep_write(char *buf) 6243 { 6244 char *cmd; 6245 int beep_cmd; 6246 6247 if (!beep_handle) 6248 return -ENODEV; 6249 6250 while ((cmd = next_cmd(&buf))) { 6251 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6252 beep_cmd >= 0 && beep_cmd <= 17) { 6253 /* beep_cmd set */ 6254 } else 6255 return -EINVAL; 6256 if (tp_features.beep_needs_two_args) { 6257 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6258 beep_cmd, 0)) 6259 return -EIO; 6260 } else { 6261 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6262 beep_cmd)) 6263 return -EIO; 6264 } 6265 } 6266 6267 return 0; 6268 } 6269 6270 static struct ibm_struct beep_driver_data = { 6271 .name = "beep", 6272 .read = beep_read, 6273 .write = beep_write, 6274 }; 6275 6276 /************************************************************************* 6277 * Thermal subdriver 6278 */ 6279 6280 enum thermal_access_mode { 6281 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6282 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6283 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6284 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6285 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6286 }; 6287 6288 enum { /* TPACPI_THERMAL_TPEC_* */ 6289 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6290 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6291 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6292 6293 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6294 }; 6295 6296 6297 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6298 struct ibm_thermal_sensors_struct { 6299 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6300 }; 6301 6302 static enum thermal_access_mode thermal_read_mode; 6303 6304 /* idx is zero-based */ 6305 static int thermal_get_sensor(int idx, s32 *value) 6306 { 6307 int t; 6308 s8 tmp; 6309 char tmpi[5]; 6310 6311 t = TP_EC_THERMAL_TMP0; 6312 6313 switch (thermal_read_mode) { 6314 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6315 case TPACPI_THERMAL_TPEC_16: 6316 if (idx >= 8 && idx <= 15) { 6317 t = TP_EC_THERMAL_TMP8; 6318 idx -= 8; 6319 } 6320 #endif 6321 /* fallthrough */ 6322 case TPACPI_THERMAL_TPEC_8: 6323 if (idx <= 7) { 6324 if (!acpi_ec_read(t + idx, &tmp)) 6325 return -EIO; 6326 *value = tmp * 1000; 6327 return 0; 6328 } 6329 break; 6330 6331 case TPACPI_THERMAL_ACPI_UPDT: 6332 if (idx <= 7) { 6333 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6334 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6335 return -EIO; 6336 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6337 return -EIO; 6338 *value = (t - 2732) * 100; 6339 return 0; 6340 } 6341 break; 6342 6343 case TPACPI_THERMAL_ACPI_TMP07: 6344 if (idx <= 7) { 6345 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6346 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6347 return -EIO; 6348 if (t > 127 || t < -127) 6349 t = TP_EC_THERMAL_TMP_NA; 6350 *value = t * 1000; 6351 return 0; 6352 } 6353 break; 6354 6355 case TPACPI_THERMAL_NONE: 6356 default: 6357 return -ENOSYS; 6358 } 6359 6360 return -EINVAL; 6361 } 6362 6363 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6364 { 6365 int res, i; 6366 int n; 6367 6368 n = 8; 6369 i = 0; 6370 6371 if (!s) 6372 return -EINVAL; 6373 6374 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6375 n = 16; 6376 6377 for (i = 0 ; i < n; i++) { 6378 res = thermal_get_sensor(i, &s->temp[i]); 6379 if (res) 6380 return res; 6381 } 6382 6383 return n; 6384 } 6385 6386 static void thermal_dump_all_sensors(void) 6387 { 6388 int n, i; 6389 struct ibm_thermal_sensors_struct t; 6390 6391 n = thermal_get_sensors(&t); 6392 if (n <= 0) 6393 return; 6394 6395 pr_notice("temperatures (Celsius):"); 6396 6397 for (i = 0; i < n; i++) { 6398 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6399 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6400 else 6401 pr_cont(" N/A"); 6402 } 6403 6404 pr_cont("\n"); 6405 } 6406 6407 /* sysfs temp##_input -------------------------------------------------- */ 6408 6409 static ssize_t thermal_temp_input_show(struct device *dev, 6410 struct device_attribute *attr, 6411 char *buf) 6412 { 6413 struct sensor_device_attribute *sensor_attr = 6414 to_sensor_dev_attr(attr); 6415 int idx = sensor_attr->index; 6416 s32 value; 6417 int res; 6418 6419 res = thermal_get_sensor(idx, &value); 6420 if (res) 6421 return res; 6422 if (value == TPACPI_THERMAL_SENSOR_NA) 6423 return -ENXIO; 6424 6425 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6426 } 6427 6428 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6429 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6430 thermal_temp_input_show, NULL, _idxB) 6431 6432 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6433 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6434 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6435 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6436 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6437 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6438 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6439 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6440 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6441 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6442 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6443 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6444 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6445 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6446 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6447 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6448 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6449 }; 6450 6451 #define THERMAL_ATTRS(X) \ 6452 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6453 6454 static struct attribute *thermal_temp_input_attr[] = { 6455 THERMAL_ATTRS(8), 6456 THERMAL_ATTRS(9), 6457 THERMAL_ATTRS(10), 6458 THERMAL_ATTRS(11), 6459 THERMAL_ATTRS(12), 6460 THERMAL_ATTRS(13), 6461 THERMAL_ATTRS(14), 6462 THERMAL_ATTRS(15), 6463 THERMAL_ATTRS(0), 6464 THERMAL_ATTRS(1), 6465 THERMAL_ATTRS(2), 6466 THERMAL_ATTRS(3), 6467 THERMAL_ATTRS(4), 6468 THERMAL_ATTRS(5), 6469 THERMAL_ATTRS(6), 6470 THERMAL_ATTRS(7), 6471 NULL 6472 }; 6473 6474 static const struct attribute_group thermal_temp_input16_group = { 6475 .attrs = thermal_temp_input_attr 6476 }; 6477 6478 static const struct attribute_group thermal_temp_input8_group = { 6479 .attrs = &thermal_temp_input_attr[8] 6480 }; 6481 6482 #undef THERMAL_SENSOR_ATTR_TEMP 6483 #undef THERMAL_ATTRS 6484 6485 /* --------------------------------------------------------------------- */ 6486 6487 static int __init thermal_init(struct ibm_init_struct *iibm) 6488 { 6489 u8 t, ta1, ta2; 6490 int i; 6491 int acpi_tmp7; 6492 int res; 6493 6494 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6495 6496 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6497 6498 if (thinkpad_id.ec_model) { 6499 /* 6500 * Direct EC access mode: sensors at registers 6501 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6502 * non-implemented, thermal sensors return 0x80 when 6503 * not available 6504 */ 6505 6506 ta1 = ta2 = 0; 6507 for (i = 0; i < 8; i++) { 6508 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6509 ta1 |= t; 6510 } else { 6511 ta1 = 0; 6512 break; 6513 } 6514 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6515 ta2 |= t; 6516 } else { 6517 ta1 = 0; 6518 break; 6519 } 6520 } 6521 if (ta1 == 0) { 6522 /* This is sheer paranoia, but we handle it anyway */ 6523 if (acpi_tmp7) { 6524 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n"); 6525 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6526 } else { 6527 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n"); 6528 thermal_read_mode = TPACPI_THERMAL_NONE; 6529 } 6530 } else { 6531 thermal_read_mode = 6532 (ta2 != 0) ? 6533 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6534 } 6535 } else if (acpi_tmp7) { 6536 if (tpacpi_is_ibm() && 6537 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6538 /* 600e/x, 770e, 770x */ 6539 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6540 } else { 6541 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6542 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6543 } 6544 } else { 6545 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6546 thermal_read_mode = TPACPI_THERMAL_NONE; 6547 } 6548 6549 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6550 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6551 thermal_read_mode); 6552 6553 switch (thermal_read_mode) { 6554 case TPACPI_THERMAL_TPEC_16: 6555 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6556 &thermal_temp_input16_group); 6557 if (res) 6558 return res; 6559 break; 6560 case TPACPI_THERMAL_TPEC_8: 6561 case TPACPI_THERMAL_ACPI_TMP07: 6562 case TPACPI_THERMAL_ACPI_UPDT: 6563 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6564 &thermal_temp_input8_group); 6565 if (res) 6566 return res; 6567 break; 6568 case TPACPI_THERMAL_NONE: 6569 default: 6570 return 1; 6571 } 6572 6573 return 0; 6574 } 6575 6576 static void thermal_exit(void) 6577 { 6578 switch (thermal_read_mode) { 6579 case TPACPI_THERMAL_TPEC_16: 6580 sysfs_remove_group(&tpacpi_hwmon->kobj, 6581 &thermal_temp_input16_group); 6582 break; 6583 case TPACPI_THERMAL_TPEC_8: 6584 case TPACPI_THERMAL_ACPI_TMP07: 6585 case TPACPI_THERMAL_ACPI_UPDT: 6586 sysfs_remove_group(&tpacpi_hwmon->kobj, 6587 &thermal_temp_input8_group); 6588 break; 6589 case TPACPI_THERMAL_NONE: 6590 default: 6591 break; 6592 } 6593 } 6594 6595 static int thermal_read(struct seq_file *m) 6596 { 6597 int n, i; 6598 struct ibm_thermal_sensors_struct t; 6599 6600 n = thermal_get_sensors(&t); 6601 if (unlikely(n < 0)) 6602 return n; 6603 6604 seq_printf(m, "temperatures:\t"); 6605 6606 if (n > 0) { 6607 for (i = 0; i < (n - 1); i++) 6608 seq_printf(m, "%d ", t.temp[i] / 1000); 6609 seq_printf(m, "%d\n", t.temp[i] / 1000); 6610 } else 6611 seq_printf(m, "not supported\n"); 6612 6613 return 0; 6614 } 6615 6616 static struct ibm_struct thermal_driver_data = { 6617 .name = "thermal", 6618 .read = thermal_read, 6619 .exit = thermal_exit, 6620 }; 6621 6622 /************************************************************************* 6623 * Backlight/brightness subdriver 6624 */ 6625 6626 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6627 6628 /* 6629 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6630 * CMOS NVRAM byte 0x5E, bits 0-3. 6631 * 6632 * EC HBRV (0x31) has the following layout 6633 * Bit 7: unknown function 6634 * Bit 6: unknown function 6635 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6636 * Bit 4: must be set to zero to avoid problems 6637 * Bit 3-0: backlight brightness level 6638 * 6639 * brightness_get_raw returns status data in the HBRV layout 6640 * 6641 * WARNING: The X61 has been verified to use HBRV for something else, so 6642 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6643 * testing on the very early *60 Lenovo models... 6644 */ 6645 6646 enum { 6647 TP_EC_BACKLIGHT = 0x31, 6648 6649 /* TP_EC_BACKLIGHT bitmasks */ 6650 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6651 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6652 TP_EC_BACKLIGHT_MAPSW = 0x20, 6653 }; 6654 6655 enum tpacpi_brightness_access_mode { 6656 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6657 TPACPI_BRGHT_MODE_EC, /* EC control */ 6658 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6659 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6660 TPACPI_BRGHT_MODE_MAX 6661 }; 6662 6663 static struct backlight_device *ibm_backlight_device; 6664 6665 static enum tpacpi_brightness_access_mode brightness_mode = 6666 TPACPI_BRGHT_MODE_MAX; 6667 6668 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6669 6670 static struct mutex brightness_mutex; 6671 6672 /* NVRAM brightness access, 6673 * call with brightness_mutex held! */ 6674 static unsigned int tpacpi_brightness_nvram_get(void) 6675 { 6676 u8 lnvram; 6677 6678 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6679 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6680 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6681 lnvram &= bright_maxlvl; 6682 6683 return lnvram; 6684 } 6685 6686 static void tpacpi_brightness_checkpoint_nvram(void) 6687 { 6688 u8 lec = 0; 6689 u8 b_nvram; 6690 6691 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6692 return; 6693 6694 vdbg_printk(TPACPI_DBG_BRGHT, 6695 "trying to checkpoint backlight level to NVRAM...\n"); 6696 6697 if (mutex_lock_killable(&brightness_mutex) < 0) 6698 return; 6699 6700 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6701 goto unlock; 6702 lec &= TP_EC_BACKLIGHT_LVLMSK; 6703 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6704 6705 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6706 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6707 /* NVRAM needs update */ 6708 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6709 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6710 b_nvram |= lec; 6711 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6712 dbg_printk(TPACPI_DBG_BRGHT, 6713 "updated NVRAM backlight level to %u (0x%02x)\n", 6714 (unsigned int) lec, (unsigned int) b_nvram); 6715 } else 6716 vdbg_printk(TPACPI_DBG_BRGHT, 6717 "NVRAM backlight level already is %u (0x%02x)\n", 6718 (unsigned int) lec, (unsigned int) b_nvram); 6719 6720 unlock: 6721 mutex_unlock(&brightness_mutex); 6722 } 6723 6724 6725 /* call with brightness_mutex held! */ 6726 static int tpacpi_brightness_get_raw(int *status) 6727 { 6728 u8 lec = 0; 6729 6730 switch (brightness_mode) { 6731 case TPACPI_BRGHT_MODE_UCMS_STEP: 6732 *status = tpacpi_brightness_nvram_get(); 6733 return 0; 6734 case TPACPI_BRGHT_MODE_EC: 6735 case TPACPI_BRGHT_MODE_ECNVRAM: 6736 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6737 return -EIO; 6738 *status = lec; 6739 return 0; 6740 default: 6741 return -ENXIO; 6742 } 6743 } 6744 6745 /* call with brightness_mutex held! */ 6746 /* do NOT call with illegal backlight level value */ 6747 static int tpacpi_brightness_set_ec(unsigned int value) 6748 { 6749 u8 lec = 0; 6750 6751 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6752 return -EIO; 6753 6754 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6755 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6756 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6757 return -EIO; 6758 6759 return 0; 6760 } 6761 6762 /* call with brightness_mutex held! */ 6763 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6764 { 6765 int cmos_cmd, inc; 6766 unsigned int current_value, i; 6767 6768 current_value = tpacpi_brightness_nvram_get(); 6769 6770 if (value == current_value) 6771 return 0; 6772 6773 cmos_cmd = (value > current_value) ? 6774 TP_CMOS_BRIGHTNESS_UP : 6775 TP_CMOS_BRIGHTNESS_DOWN; 6776 inc = (value > current_value) ? 1 : -1; 6777 6778 for (i = current_value; i != value; i += inc) 6779 if (issue_thinkpad_cmos_command(cmos_cmd)) 6780 return -EIO; 6781 6782 return 0; 6783 } 6784 6785 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6786 static int brightness_set(unsigned int value) 6787 { 6788 int res; 6789 6790 if (value > bright_maxlvl) 6791 return -EINVAL; 6792 6793 vdbg_printk(TPACPI_DBG_BRGHT, 6794 "set backlight level to %d\n", value); 6795 6796 res = mutex_lock_killable(&brightness_mutex); 6797 if (res < 0) 6798 return res; 6799 6800 switch (brightness_mode) { 6801 case TPACPI_BRGHT_MODE_EC: 6802 case TPACPI_BRGHT_MODE_ECNVRAM: 6803 res = tpacpi_brightness_set_ec(value); 6804 break; 6805 case TPACPI_BRGHT_MODE_UCMS_STEP: 6806 res = tpacpi_brightness_set_ucmsstep(value); 6807 break; 6808 default: 6809 res = -ENXIO; 6810 } 6811 6812 mutex_unlock(&brightness_mutex); 6813 return res; 6814 } 6815 6816 /* sysfs backlight class ----------------------------------------------- */ 6817 6818 static int brightness_update_status(struct backlight_device *bd) 6819 { 6820 unsigned int level = 6821 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6822 bd->props.power == FB_BLANK_UNBLANK) ? 6823 bd->props.brightness : 0; 6824 6825 dbg_printk(TPACPI_DBG_BRGHT, 6826 "backlight: attempt to set level to %d\n", 6827 level); 6828 6829 /* it is the backlight class's job (caller) to handle 6830 * EINTR and other errors properly */ 6831 return brightness_set(level); 6832 } 6833 6834 static int brightness_get(struct backlight_device *bd) 6835 { 6836 int status, res; 6837 6838 res = mutex_lock_killable(&brightness_mutex); 6839 if (res < 0) 6840 return 0; 6841 6842 res = tpacpi_brightness_get_raw(&status); 6843 6844 mutex_unlock(&brightness_mutex); 6845 6846 if (res < 0) 6847 return 0; 6848 6849 return status & TP_EC_BACKLIGHT_LVLMSK; 6850 } 6851 6852 static void tpacpi_brightness_notify_change(void) 6853 { 6854 backlight_force_update(ibm_backlight_device, 6855 BACKLIGHT_UPDATE_HOTKEY); 6856 } 6857 6858 static const struct backlight_ops ibm_backlight_data = { 6859 .get_brightness = brightness_get, 6860 .update_status = brightness_update_status, 6861 }; 6862 6863 /* --------------------------------------------------------------------- */ 6864 6865 /* 6866 * Call _BCL method of video device. On some ThinkPads this will 6867 * switch the firmware to the ACPI brightness control mode. 6868 */ 6869 6870 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6871 { 6872 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6873 union acpi_object *obj; 6874 struct acpi_device *device, *child; 6875 int rc; 6876 6877 if (acpi_bus_get_device(handle, &device)) 6878 return 0; 6879 6880 rc = 0; 6881 list_for_each_entry(child, &device->children, node) { 6882 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6883 NULL, &buffer); 6884 if (ACPI_FAILURE(status)) 6885 continue; 6886 6887 obj = (union acpi_object *)buffer.pointer; 6888 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6889 pr_err("Unknown _BCL data, please report this to %s\n", 6890 TPACPI_MAIL); 6891 rc = 0; 6892 } else { 6893 rc = obj->package.count; 6894 } 6895 break; 6896 } 6897 6898 kfree(buffer.pointer); 6899 return rc; 6900 } 6901 6902 6903 /* 6904 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6905 */ 6906 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6907 { 6908 acpi_handle video_device; 6909 int bcl_levels = 0; 6910 6911 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6912 if (video_device) 6913 bcl_levels = tpacpi_query_bcl_levels(video_device); 6914 6915 tp_features.bright_acpimode = (bcl_levels > 0); 6916 6917 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6918 } 6919 6920 /* 6921 * These are only useful for models that have only one possibility 6922 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6923 * these quirks. 6924 */ 6925 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6926 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6927 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6928 6929 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6930 /* Models with ATI GPUs known to require ECNVRAM mode */ 6931 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6932 6933 /* Models with ATI GPUs that can use ECNVRAM */ 6934 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6935 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6936 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6937 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6938 6939 /* Models with Intel Extreme Graphics 2 */ 6940 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6941 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6942 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6943 6944 /* Models with Intel GMA900 */ 6945 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6946 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6947 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6948 }; 6949 6950 /* 6951 * Returns < 0 for error, otherwise sets tp_features.bright_* 6952 * and bright_maxlvl. 6953 */ 6954 static void __init tpacpi_detect_brightness_capabilities(void) 6955 { 6956 unsigned int b; 6957 6958 vdbg_printk(TPACPI_DBG_INIT, 6959 "detecting firmware brightness interface capabilities\n"); 6960 6961 /* we could run a quirks check here (same table used by 6962 * brightness_init) if needed */ 6963 6964 /* 6965 * We always attempt to detect acpi support, so as to switch 6966 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6967 * going to publish a backlight interface 6968 */ 6969 b = tpacpi_check_std_acpi_brightness_support(); 6970 switch (b) { 6971 case 16: 6972 bright_maxlvl = 15; 6973 break; 6974 case 8: 6975 case 0: 6976 bright_maxlvl = 7; 6977 break; 6978 default: 6979 tp_features.bright_unkfw = 1; 6980 bright_maxlvl = b - 1; 6981 } 6982 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6983 } 6984 6985 static int __init brightness_init(struct ibm_init_struct *iibm) 6986 { 6987 struct backlight_properties props; 6988 int b; 6989 unsigned long quirks; 6990 6991 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6992 6993 mutex_init(&brightness_mutex); 6994 6995 quirks = tpacpi_check_quirks(brightness_quirk_table, 6996 ARRAY_SIZE(brightness_quirk_table)); 6997 6998 /* tpacpi_detect_brightness_capabilities() must have run already */ 6999 7000 /* if it is unknown, we don't handle it: it wouldn't be safe */ 7001 if (tp_features.bright_unkfw) 7002 return 1; 7003 7004 if (!brightness_enable) { 7005 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7006 "brightness support disabled by module parameter\n"); 7007 return 1; 7008 } 7009 7010 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 7011 if (brightness_enable > 1) { 7012 pr_info("Standard ACPI backlight interface available, not loading native one\n"); 7013 return 1; 7014 } else if (brightness_enable == 1) { 7015 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n"); 7016 return 1; 7017 } 7018 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 7019 pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n"); 7020 } 7021 7022 /* 7023 * Check for module parameter bogosity, note that we 7024 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 7025 * able to detect "unspecified" 7026 */ 7027 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 7028 return -EINVAL; 7029 7030 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 7031 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 7032 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 7033 if (quirks & TPACPI_BRGHT_Q_EC) 7034 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 7035 else 7036 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 7037 7038 dbg_printk(TPACPI_DBG_BRGHT, 7039 "driver auto-selected brightness_mode=%d\n", 7040 brightness_mode); 7041 } 7042 7043 /* Safety */ 7044 if (!tpacpi_is_ibm() && 7045 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 7046 brightness_mode == TPACPI_BRGHT_MODE_EC)) 7047 return -EINVAL; 7048 7049 if (tpacpi_brightness_get_raw(&b) < 0) 7050 return 1; 7051 7052 memset(&props, 0, sizeof(struct backlight_properties)); 7053 props.type = BACKLIGHT_PLATFORM; 7054 props.max_brightness = bright_maxlvl; 7055 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 7056 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 7057 NULL, NULL, 7058 &ibm_backlight_data, 7059 &props); 7060 if (IS_ERR(ibm_backlight_device)) { 7061 int rc = PTR_ERR(ibm_backlight_device); 7062 ibm_backlight_device = NULL; 7063 pr_err("Could not register backlight device\n"); 7064 return rc; 7065 } 7066 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7067 "brightness is supported\n"); 7068 7069 if (quirks & TPACPI_BRGHT_Q_ASK) { 7070 pr_notice("brightness: will use unverified default: brightness_mode=%d\n", 7071 brightness_mode); 7072 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n", 7073 TPACPI_MAIL); 7074 } 7075 7076 /* Added by mistake in early 2007. Probably useless, but it could 7077 * be working around some unknown firmware problem where the value 7078 * read at startup doesn't match the real hardware state... so leave 7079 * it in place just in case */ 7080 backlight_update_status(ibm_backlight_device); 7081 7082 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7083 "brightness: registering brightness hotkeys as change notification\n"); 7084 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7085 | TP_ACPI_HKEY_BRGHTUP_MASK 7086 | TP_ACPI_HKEY_BRGHTDWN_MASK); 7087 return 0; 7088 } 7089 7090 static void brightness_suspend(void) 7091 { 7092 tpacpi_brightness_checkpoint_nvram(); 7093 } 7094 7095 static void brightness_shutdown(void) 7096 { 7097 tpacpi_brightness_checkpoint_nvram(); 7098 } 7099 7100 static void brightness_exit(void) 7101 { 7102 if (ibm_backlight_device) { 7103 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 7104 "calling backlight_device_unregister()\n"); 7105 backlight_device_unregister(ibm_backlight_device); 7106 } 7107 7108 tpacpi_brightness_checkpoint_nvram(); 7109 } 7110 7111 static int brightness_read(struct seq_file *m) 7112 { 7113 int level; 7114 7115 level = brightness_get(NULL); 7116 if (level < 0) { 7117 seq_printf(m, "level:\t\tunreadable\n"); 7118 } else { 7119 seq_printf(m, "level:\t\t%d\n", level); 7120 seq_printf(m, "commands:\tup, down\n"); 7121 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7122 bright_maxlvl); 7123 } 7124 7125 return 0; 7126 } 7127 7128 static int brightness_write(char *buf) 7129 { 7130 int level; 7131 int rc; 7132 char *cmd; 7133 7134 level = brightness_get(NULL); 7135 if (level < 0) 7136 return level; 7137 7138 while ((cmd = next_cmd(&buf))) { 7139 if (strlencmp(cmd, "up") == 0) { 7140 if (level < bright_maxlvl) 7141 level++; 7142 } else if (strlencmp(cmd, "down") == 0) { 7143 if (level > 0) 7144 level--; 7145 } else if (sscanf(cmd, "level %d", &level) == 1 && 7146 level >= 0 && level <= bright_maxlvl) { 7147 /* new level set */ 7148 } else 7149 return -EINVAL; 7150 } 7151 7152 tpacpi_disclose_usertask("procfs brightness", 7153 "set level to %d\n", level); 7154 7155 /* 7156 * Now we know what the final level should be, so we try to set it. 7157 * Doing it this way makes the syscall restartable in case of EINTR 7158 */ 7159 rc = brightness_set(level); 7160 if (!rc && ibm_backlight_device) 7161 backlight_force_update(ibm_backlight_device, 7162 BACKLIGHT_UPDATE_SYSFS); 7163 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7164 } 7165 7166 static struct ibm_struct brightness_driver_data = { 7167 .name = "brightness", 7168 .read = brightness_read, 7169 .write = brightness_write, 7170 .exit = brightness_exit, 7171 .suspend = brightness_suspend, 7172 .shutdown = brightness_shutdown, 7173 }; 7174 7175 /************************************************************************* 7176 * Volume subdriver 7177 */ 7178 7179 /* 7180 * IBM ThinkPads have a simple volume controller with MUTE gating. 7181 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 7182 * 7183 * Since the *61 series (and probably also the later *60 series), Lenovo 7184 * ThinkPads only implement the MUTE gate. 7185 * 7186 * EC register 0x30 7187 * Bit 6: MUTE (1 mutes sound) 7188 * Bit 3-0: Volume 7189 * Other bits should be zero as far as we know. 7190 * 7191 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 7192 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 7193 * such as bit 7 which is used to detect repeated presses of MUTE, 7194 * and we leave them unchanged. 7195 * 7196 * On newer Lenovo ThinkPads, the EC can automatically change the volume 7197 * in response to user input. Unfortunately, this rarely works well. 7198 * The laptop changes the state of its internal MUTE gate and, on some 7199 * models, sends KEY_MUTE, causing any user code that responds to the 7200 * mute button to get confused. The hardware MUTE gate is also 7201 * unnecessary, since user code can handle the mute button without 7202 * kernel or EC help. 7203 * 7204 * To avoid confusing userspace, we simply disable all EC-based mute 7205 * and volume controls when possible. 7206 */ 7207 7208 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 7209 7210 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 7211 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 7212 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7213 7214 #if SNDRV_CARDS <= 32 7215 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7216 #else 7217 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7218 #endif 7219 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7220 static char *alsa_id = "ThinkPadEC"; 7221 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7222 7223 struct tpacpi_alsa_data { 7224 struct snd_card *card; 7225 struct snd_ctl_elem_id *ctl_mute_id; 7226 struct snd_ctl_elem_id *ctl_vol_id; 7227 }; 7228 7229 static struct snd_card *alsa_card; 7230 7231 enum { 7232 TP_EC_AUDIO = 0x30, 7233 7234 /* TP_EC_AUDIO bits */ 7235 TP_EC_AUDIO_MUTESW = 6, 7236 7237 /* TP_EC_AUDIO bitmasks */ 7238 TP_EC_AUDIO_LVL_MSK = 0x0F, 7239 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7240 7241 /* Maximum volume */ 7242 TP_EC_VOLUME_MAX = 14, 7243 }; 7244 7245 enum tpacpi_volume_access_mode { 7246 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7247 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7248 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7249 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7250 TPACPI_VOL_MODE_MAX 7251 }; 7252 7253 enum tpacpi_volume_capabilities { 7254 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7255 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7256 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7257 TPACPI_VOL_CAP_MAX 7258 }; 7259 7260 enum tpacpi_mute_btn_mode { 7261 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7262 /* We don't know what mode 1 is. */ 7263 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7264 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7265 }; 7266 7267 static enum tpacpi_volume_access_mode volume_mode = 7268 TPACPI_VOL_MODE_MAX; 7269 7270 static enum tpacpi_volume_capabilities volume_capabilities; 7271 static bool volume_control_allowed; 7272 static bool software_mute_requested = true; 7273 static bool software_mute_active; 7274 static int software_mute_orig_mode; 7275 7276 /* 7277 * Used to syncronize writers to TP_EC_AUDIO and 7278 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7279 */ 7280 static struct mutex volume_mutex; 7281 7282 static void tpacpi_volume_checkpoint_nvram(void) 7283 { 7284 u8 lec = 0; 7285 u8 b_nvram; 7286 u8 ec_mask; 7287 7288 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7289 return; 7290 if (!volume_control_allowed) 7291 return; 7292 if (software_mute_active) 7293 return; 7294 7295 vdbg_printk(TPACPI_DBG_MIXER, 7296 "trying to checkpoint mixer state to NVRAM...\n"); 7297 7298 if (tp_features.mixer_no_level_control) 7299 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7300 else 7301 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7302 7303 if (mutex_lock_killable(&volume_mutex) < 0) 7304 return; 7305 7306 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7307 goto unlock; 7308 lec &= ec_mask; 7309 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7310 7311 if (lec != (b_nvram & ec_mask)) { 7312 /* NVRAM needs update */ 7313 b_nvram &= ~ec_mask; 7314 b_nvram |= lec; 7315 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7316 dbg_printk(TPACPI_DBG_MIXER, 7317 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7318 (unsigned int) lec, (unsigned int) b_nvram); 7319 } else { 7320 vdbg_printk(TPACPI_DBG_MIXER, 7321 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7322 (unsigned int) lec, (unsigned int) b_nvram); 7323 } 7324 7325 unlock: 7326 mutex_unlock(&volume_mutex); 7327 } 7328 7329 static int volume_get_status_ec(u8 *status) 7330 { 7331 u8 s; 7332 7333 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7334 return -EIO; 7335 7336 *status = s; 7337 7338 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7339 7340 return 0; 7341 } 7342 7343 static int volume_get_status(u8 *status) 7344 { 7345 return volume_get_status_ec(status); 7346 } 7347 7348 static int volume_set_status_ec(const u8 status) 7349 { 7350 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7351 return -EIO; 7352 7353 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7354 7355 /* 7356 * On X200s, and possibly on others, it can take a while for 7357 * reads to become correct. 7358 */ 7359 msleep(1); 7360 7361 return 0; 7362 } 7363 7364 static int volume_set_status(const u8 status) 7365 { 7366 return volume_set_status_ec(status); 7367 } 7368 7369 /* returns < 0 on error, 0 on no change, 1 on change */ 7370 static int __volume_set_mute_ec(const bool mute) 7371 { 7372 int rc; 7373 u8 s, n; 7374 7375 if (mutex_lock_killable(&volume_mutex) < 0) 7376 return -EINTR; 7377 7378 rc = volume_get_status_ec(&s); 7379 if (rc) 7380 goto unlock; 7381 7382 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7383 s & ~TP_EC_AUDIO_MUTESW_MSK; 7384 7385 if (n != s) { 7386 rc = volume_set_status_ec(n); 7387 if (!rc) 7388 rc = 1; 7389 } 7390 7391 unlock: 7392 mutex_unlock(&volume_mutex); 7393 return rc; 7394 } 7395 7396 static int volume_alsa_set_mute(const bool mute) 7397 { 7398 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7399 (mute) ? "" : "un"); 7400 return __volume_set_mute_ec(mute); 7401 } 7402 7403 static int volume_set_mute(const bool mute) 7404 { 7405 int rc; 7406 7407 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7408 (mute) ? "" : "un"); 7409 7410 rc = __volume_set_mute_ec(mute); 7411 return (rc < 0) ? rc : 0; 7412 } 7413 7414 /* returns < 0 on error, 0 on no change, 1 on change */ 7415 static int __volume_set_volume_ec(const u8 vol) 7416 { 7417 int rc; 7418 u8 s, n; 7419 7420 if (vol > TP_EC_VOLUME_MAX) 7421 return -EINVAL; 7422 7423 if (mutex_lock_killable(&volume_mutex) < 0) 7424 return -EINTR; 7425 7426 rc = volume_get_status_ec(&s); 7427 if (rc) 7428 goto unlock; 7429 7430 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7431 7432 if (n != s) { 7433 rc = volume_set_status_ec(n); 7434 if (!rc) 7435 rc = 1; 7436 } 7437 7438 unlock: 7439 mutex_unlock(&volume_mutex); 7440 return rc; 7441 } 7442 7443 static int volume_set_software_mute(bool startup) 7444 { 7445 int result; 7446 7447 if (!tpacpi_is_lenovo()) 7448 return -ENODEV; 7449 7450 if (startup) { 7451 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7452 "HAUM", "qd")) 7453 return -EIO; 7454 7455 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7456 "Initial HAUM setting was %d\n", 7457 software_mute_orig_mode); 7458 } 7459 7460 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7461 (int)TP_EC_MUTE_BTN_NONE)) 7462 return -EIO; 7463 7464 if (result != TP_EC_MUTE_BTN_NONE) 7465 pr_warn("Unexpected SAUM result %d\n", 7466 result); 7467 7468 /* 7469 * In software mute mode, the standard codec controls take 7470 * precendence, so we unmute the ThinkPad HW switch at 7471 * startup. Just on case there are SAUM-capable ThinkPads 7472 * with level controls, set max HW volume as well. 7473 */ 7474 if (tp_features.mixer_no_level_control) 7475 result = volume_set_mute(false); 7476 else 7477 result = volume_set_status(TP_EC_VOLUME_MAX); 7478 7479 if (result != 0) 7480 pr_warn("Failed to unmute the HW mute switch\n"); 7481 7482 return 0; 7483 } 7484 7485 static void volume_exit_software_mute(void) 7486 { 7487 int r; 7488 7489 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7490 || r != software_mute_orig_mode) 7491 pr_warn("Failed to restore mute mode\n"); 7492 } 7493 7494 static int volume_alsa_set_volume(const u8 vol) 7495 { 7496 dbg_printk(TPACPI_DBG_MIXER, 7497 "ALSA: trying to set volume level to %hu\n", vol); 7498 return __volume_set_volume_ec(vol); 7499 } 7500 7501 static void volume_alsa_notify_change(void) 7502 { 7503 struct tpacpi_alsa_data *d; 7504 7505 if (alsa_card && alsa_card->private_data) { 7506 d = alsa_card->private_data; 7507 if (d->ctl_mute_id) 7508 snd_ctl_notify(alsa_card, 7509 SNDRV_CTL_EVENT_MASK_VALUE, 7510 d->ctl_mute_id); 7511 if (d->ctl_vol_id) 7512 snd_ctl_notify(alsa_card, 7513 SNDRV_CTL_EVENT_MASK_VALUE, 7514 d->ctl_vol_id); 7515 } 7516 } 7517 7518 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7519 struct snd_ctl_elem_info *uinfo) 7520 { 7521 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7522 uinfo->count = 1; 7523 uinfo->value.integer.min = 0; 7524 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7525 return 0; 7526 } 7527 7528 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7529 struct snd_ctl_elem_value *ucontrol) 7530 { 7531 u8 s; 7532 int rc; 7533 7534 rc = volume_get_status(&s); 7535 if (rc < 0) 7536 return rc; 7537 7538 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7539 return 0; 7540 } 7541 7542 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7543 struct snd_ctl_elem_value *ucontrol) 7544 { 7545 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7546 ucontrol->value.integer.value[0]); 7547 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7548 } 7549 7550 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7551 7552 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7553 struct snd_ctl_elem_value *ucontrol) 7554 { 7555 u8 s; 7556 int rc; 7557 7558 rc = volume_get_status(&s); 7559 if (rc < 0) 7560 return rc; 7561 7562 ucontrol->value.integer.value[0] = 7563 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7564 return 0; 7565 } 7566 7567 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7568 struct snd_ctl_elem_value *ucontrol) 7569 { 7570 tpacpi_disclose_usertask("ALSA", "%smute\n", 7571 ucontrol->value.integer.value[0] ? 7572 "un" : ""); 7573 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7574 } 7575 7576 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7577 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7578 .name = "Console Playback Volume", 7579 .index = 0, 7580 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7581 .info = volume_alsa_vol_info, 7582 .get = volume_alsa_vol_get, 7583 }; 7584 7585 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7586 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7587 .name = "Console Playback Switch", 7588 .index = 0, 7589 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7590 .info = volume_alsa_mute_info, 7591 .get = volume_alsa_mute_get, 7592 }; 7593 7594 static void volume_suspend(void) 7595 { 7596 tpacpi_volume_checkpoint_nvram(); 7597 } 7598 7599 static void volume_resume(void) 7600 { 7601 if (software_mute_active) { 7602 if (volume_set_software_mute(false) < 0) 7603 pr_warn("Failed to restore software mute\n"); 7604 } else { 7605 volume_alsa_notify_change(); 7606 } 7607 } 7608 7609 static void volume_shutdown(void) 7610 { 7611 tpacpi_volume_checkpoint_nvram(); 7612 } 7613 7614 static void volume_exit(void) 7615 { 7616 if (alsa_card) { 7617 snd_card_free(alsa_card); 7618 alsa_card = NULL; 7619 } 7620 7621 tpacpi_volume_checkpoint_nvram(); 7622 7623 if (software_mute_active) 7624 volume_exit_software_mute(); 7625 } 7626 7627 static int __init volume_create_alsa_mixer(void) 7628 { 7629 struct snd_card *card; 7630 struct tpacpi_alsa_data *data; 7631 struct snd_kcontrol *ctl_vol; 7632 struct snd_kcontrol *ctl_mute; 7633 int rc; 7634 7635 rc = snd_card_new(&tpacpi_pdev->dev, 7636 alsa_index, alsa_id, THIS_MODULE, 7637 sizeof(struct tpacpi_alsa_data), &card); 7638 if (rc < 0 || !card) { 7639 pr_err("Failed to create ALSA card structures: %d\n", rc); 7640 return 1; 7641 } 7642 7643 BUG_ON(!card->private_data); 7644 data = card->private_data; 7645 data->card = card; 7646 7647 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7648 sizeof(card->driver)); 7649 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7650 sizeof(card->shortname)); 7651 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7652 (thinkpad_id.ec_version_str) ? 7653 thinkpad_id.ec_version_str : "(unknown)"); 7654 snprintf(card->longname, sizeof(card->longname), 7655 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7656 (thinkpad_id.ec_version_str) ? 7657 thinkpad_id.ec_version_str : "unknown"); 7658 7659 if (volume_control_allowed) { 7660 volume_alsa_control_vol.put = volume_alsa_vol_put; 7661 volume_alsa_control_vol.access = 7662 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7663 7664 volume_alsa_control_mute.put = volume_alsa_mute_put; 7665 volume_alsa_control_mute.access = 7666 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7667 } 7668 7669 if (!tp_features.mixer_no_level_control) { 7670 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7671 rc = snd_ctl_add(card, ctl_vol); 7672 if (rc < 0) { 7673 pr_err("Failed to create ALSA volume control: %d\n", 7674 rc); 7675 goto err_exit; 7676 } 7677 data->ctl_vol_id = &ctl_vol->id; 7678 } 7679 7680 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7681 rc = snd_ctl_add(card, ctl_mute); 7682 if (rc < 0) { 7683 pr_err("Failed to create ALSA mute control: %d\n", rc); 7684 goto err_exit; 7685 } 7686 data->ctl_mute_id = &ctl_mute->id; 7687 7688 rc = snd_card_register(card); 7689 if (rc < 0) { 7690 pr_err("Failed to register ALSA card: %d\n", rc); 7691 goto err_exit; 7692 } 7693 7694 alsa_card = card; 7695 return 0; 7696 7697 err_exit: 7698 snd_card_free(card); 7699 return 1; 7700 } 7701 7702 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7703 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7704 7705 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7706 /* Whitelist volume level on all IBM by default */ 7707 { .vendor = PCI_VENDOR_ID_IBM, 7708 .bios = TPACPI_MATCH_ANY, 7709 .ec = TPACPI_MATCH_ANY, 7710 .quirks = TPACPI_VOL_Q_LEVEL }, 7711 7712 /* Lenovo models with volume control (needs confirmation) */ 7713 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7714 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7715 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7716 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7717 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7718 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7719 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7720 7721 /* Whitelist mute-only on all Lenovo by default */ 7722 { .vendor = PCI_VENDOR_ID_LENOVO, 7723 .bios = TPACPI_MATCH_ANY, 7724 .ec = TPACPI_MATCH_ANY, 7725 .quirks = TPACPI_VOL_Q_MUTEONLY } 7726 }; 7727 7728 static int __init volume_init(struct ibm_init_struct *iibm) 7729 { 7730 unsigned long quirks; 7731 int rc; 7732 7733 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7734 7735 mutex_init(&volume_mutex); 7736 7737 /* 7738 * Check for module parameter bogosity, note that we 7739 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7740 * able to detect "unspecified" 7741 */ 7742 if (volume_mode > TPACPI_VOL_MODE_MAX) 7743 return -EINVAL; 7744 7745 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7746 pr_err("UCMS step volume mode not implemented, please contact %s\n", 7747 TPACPI_MAIL); 7748 return 1; 7749 } 7750 7751 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7752 return -EINVAL; 7753 7754 /* 7755 * The ALSA mixer is our primary interface. 7756 * When disabled, don't install the subdriver at all 7757 */ 7758 if (!alsa_enable) { 7759 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7760 "ALSA mixer disabled by parameter, not loading volume subdriver...\n"); 7761 return 1; 7762 } 7763 7764 quirks = tpacpi_check_quirks(volume_quirk_table, 7765 ARRAY_SIZE(volume_quirk_table)); 7766 7767 switch (volume_capabilities) { 7768 case TPACPI_VOL_CAP_AUTO: 7769 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7770 tp_features.mixer_no_level_control = 1; 7771 else if (quirks & TPACPI_VOL_Q_LEVEL) 7772 tp_features.mixer_no_level_control = 0; 7773 else 7774 return 1; /* no mixer */ 7775 break; 7776 case TPACPI_VOL_CAP_VOLMUTE: 7777 tp_features.mixer_no_level_control = 0; 7778 break; 7779 case TPACPI_VOL_CAP_MUTEONLY: 7780 tp_features.mixer_no_level_control = 1; 7781 break; 7782 default: 7783 return 1; 7784 } 7785 7786 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7787 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7788 "using user-supplied volume_capabilities=%d\n", 7789 volume_capabilities); 7790 7791 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7792 volume_mode == TPACPI_VOL_MODE_MAX) { 7793 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7794 7795 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7796 "driver auto-selected volume_mode=%d\n", 7797 volume_mode); 7798 } else { 7799 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7800 "using user-supplied volume_mode=%d\n", 7801 volume_mode); 7802 } 7803 7804 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7805 "mute is supported, volume control is %s\n", 7806 str_supported(!tp_features.mixer_no_level_control)); 7807 7808 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7809 software_mute_active = true; 7810 } else { 7811 rc = volume_create_alsa_mixer(); 7812 if (rc) { 7813 pr_err("Could not create the ALSA mixer interface\n"); 7814 return rc; 7815 } 7816 7817 pr_info("Console audio control enabled, mode: %s\n", 7818 (volume_control_allowed) ? 7819 "override (read/write)" : 7820 "monitor (read only)"); 7821 } 7822 7823 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7824 "registering volume hotkeys as change notification\n"); 7825 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7826 | TP_ACPI_HKEY_VOLUP_MASK 7827 | TP_ACPI_HKEY_VOLDWN_MASK 7828 | TP_ACPI_HKEY_MUTE_MASK); 7829 7830 return 0; 7831 } 7832 7833 static int volume_read(struct seq_file *m) 7834 { 7835 u8 status; 7836 7837 if (volume_get_status(&status) < 0) { 7838 seq_printf(m, "level:\t\tunreadable\n"); 7839 } else { 7840 if (tp_features.mixer_no_level_control) 7841 seq_printf(m, "level:\t\tunsupported\n"); 7842 else 7843 seq_printf(m, "level:\t\t%d\n", 7844 status & TP_EC_AUDIO_LVL_MSK); 7845 7846 seq_printf(m, "mute:\t\t%s\n", 7847 onoff(status, TP_EC_AUDIO_MUTESW)); 7848 7849 if (volume_control_allowed) { 7850 seq_printf(m, "commands:\tunmute, mute\n"); 7851 if (!tp_features.mixer_no_level_control) { 7852 seq_printf(m, "commands:\tup, down\n"); 7853 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7854 TP_EC_VOLUME_MAX); 7855 } 7856 } 7857 } 7858 7859 return 0; 7860 } 7861 7862 static int volume_write(char *buf) 7863 { 7864 u8 s; 7865 u8 new_level, new_mute; 7866 int l; 7867 char *cmd; 7868 int rc; 7869 7870 /* 7871 * We do allow volume control at driver startup, so that the 7872 * user can set initial state through the volume=... parameter hack. 7873 */ 7874 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7875 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7876 tp_warned.volume_ctrl_forbidden = 1; 7877 pr_notice("Console audio control in monitor mode, changes are not allowed\n"); 7878 pr_notice("Use the volume_control=1 module parameter to enable volume control\n"); 7879 } 7880 return -EPERM; 7881 } 7882 7883 rc = volume_get_status(&s); 7884 if (rc < 0) 7885 return rc; 7886 7887 new_level = s & TP_EC_AUDIO_LVL_MSK; 7888 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7889 7890 while ((cmd = next_cmd(&buf))) { 7891 if (!tp_features.mixer_no_level_control) { 7892 if (strlencmp(cmd, "up") == 0) { 7893 if (new_mute) 7894 new_mute = 0; 7895 else if (new_level < TP_EC_VOLUME_MAX) 7896 new_level++; 7897 continue; 7898 } else if (strlencmp(cmd, "down") == 0) { 7899 if (new_mute) 7900 new_mute = 0; 7901 else if (new_level > 0) 7902 new_level--; 7903 continue; 7904 } else if (sscanf(cmd, "level %u", &l) == 1 && 7905 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7906 new_level = l; 7907 continue; 7908 } 7909 } 7910 if (strlencmp(cmd, "mute") == 0) 7911 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7912 else if (strlencmp(cmd, "unmute") == 0) 7913 new_mute = 0; 7914 else 7915 return -EINVAL; 7916 } 7917 7918 if (tp_features.mixer_no_level_control) { 7919 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7920 new_mute ? "" : "un"); 7921 rc = volume_set_mute(!!new_mute); 7922 } else { 7923 tpacpi_disclose_usertask("procfs volume", 7924 "%smute and set level to %d\n", 7925 new_mute ? "" : "un", new_level); 7926 rc = volume_set_status(new_mute | new_level); 7927 } 7928 volume_alsa_notify_change(); 7929 7930 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7931 } 7932 7933 static struct ibm_struct volume_driver_data = { 7934 .name = "volume", 7935 .read = volume_read, 7936 .write = volume_write, 7937 .exit = volume_exit, 7938 .suspend = volume_suspend, 7939 .resume = volume_resume, 7940 .shutdown = volume_shutdown, 7941 }; 7942 7943 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7944 7945 #define alsa_card NULL 7946 7947 static inline void volume_alsa_notify_change(void) 7948 { 7949 } 7950 7951 static int __init volume_init(struct ibm_init_struct *iibm) 7952 { 7953 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7954 7955 return 1; 7956 } 7957 7958 static struct ibm_struct volume_driver_data = { 7959 .name = "volume", 7960 }; 7961 7962 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7963 7964 /************************************************************************* 7965 * Fan subdriver 7966 */ 7967 7968 /* 7969 * FAN ACCESS MODES 7970 * 7971 * TPACPI_FAN_RD_ACPI_GFAN: 7972 * ACPI GFAN method: returns fan level 7973 * 7974 * see TPACPI_FAN_WR_ACPI_SFAN 7975 * EC 0x2f (HFSP) not available if GFAN exists 7976 * 7977 * TPACPI_FAN_WR_ACPI_SFAN: 7978 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7979 * 7980 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7981 * it for writing. 7982 * 7983 * TPACPI_FAN_WR_TPEC: 7984 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7985 * Supported on almost all ThinkPads 7986 * 7987 * Fan speed changes of any sort (including those caused by the 7988 * disengaged mode) are usually done slowly by the firmware as the 7989 * maximum amount of fan duty cycle change per second seems to be 7990 * limited. 7991 * 7992 * Reading is not available if GFAN exists. 7993 * Writing is not available if SFAN exists. 7994 * 7995 * Bits 7996 * 7 automatic mode engaged; 7997 * (default operation mode of the ThinkPad) 7998 * fan level is ignored in this mode. 7999 * 6 full speed mode (takes precedence over bit 7); 8000 * not available on all thinkpads. May disable 8001 * the tachometer while the fan controller ramps up 8002 * the speed (which can take up to a few *minutes*). 8003 * Speeds up fan to 100% duty-cycle, which is far above 8004 * the standard RPM levels. It is not impossible that 8005 * it could cause hardware damage. 8006 * 5-3 unused in some models. Extra bits for fan level 8007 * in others, but still useless as all values above 8008 * 7 map to the same speed as level 7 in these models. 8009 * 2-0 fan level (0..7 usually) 8010 * 0x00 = stop 8011 * 0x07 = max (set when temperatures critical) 8012 * Some ThinkPads may have other levels, see 8013 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 8014 * 8015 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 8016 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 8017 * does so, its initial value is meaningless (0x07). 8018 * 8019 * For firmware bugs, refer to: 8020 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 8021 * 8022 * ---- 8023 * 8024 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 8025 * Main fan tachometer reading (in RPM) 8026 * 8027 * This register is present on all ThinkPads with a new-style EC, and 8028 * it is known not to be present on the A21m/e, and T22, as there is 8029 * something else in offset 0x84 according to the ACPI DSDT. Other 8030 * ThinkPads from this same time period (and earlier) probably lack the 8031 * tachometer as well. 8032 * 8033 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 8034 * was never fixed by IBM to report the EC firmware version string 8035 * probably support the tachometer (like the early X models), so 8036 * detecting it is quite hard. We need more data to know for sure. 8037 * 8038 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 8039 * might result. 8040 * 8041 * FIRMWARE BUG: may go stale while the EC is switching to full speed 8042 * mode. 8043 * 8044 * For firmware bugs, refer to: 8045 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 8046 * 8047 * ---- 8048 * 8049 * ThinkPad EC register 0x31 bit 0 (only on select models) 8050 * 8051 * When bit 0 of EC register 0x31 is zero, the tachometer registers 8052 * show the speed of the main fan. When bit 0 of EC register 0x31 8053 * is one, the tachometer registers show the speed of the auxiliary 8054 * fan. 8055 * 8056 * Fan control seems to affect both fans, regardless of the state 8057 * of this bit. 8058 * 8059 * So far, only the firmware for the X60/X61 non-tablet versions 8060 * seem to support this (firmware TP-7M). 8061 * 8062 * TPACPI_FAN_WR_ACPI_FANS: 8063 * ThinkPad X31, X40, X41. Not available in the X60. 8064 * 8065 * FANS ACPI handle: takes three arguments: low speed, medium speed, 8066 * high speed. ACPI DSDT seems to map these three speeds to levels 8067 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 8068 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 8069 * 8070 * The speeds are stored on handles 8071 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 8072 * 8073 * There are three default speed sets, accessible as handles: 8074 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 8075 * 8076 * ACPI DSDT switches which set is in use depending on various 8077 * factors. 8078 * 8079 * TPACPI_FAN_WR_TPEC is also available and should be used to 8080 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 8081 * but the ACPI tables just mention level 7. 8082 */ 8083 8084 enum { /* Fan control constants */ 8085 fan_status_offset = 0x2f, /* EC register 0x2f */ 8086 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 8087 * 0x84 must be read before 0x85 */ 8088 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 8089 bit 0 selects which fan is active */ 8090 8091 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 8092 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 8093 8094 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 8095 }; 8096 8097 enum fan_status_access_mode { 8098 TPACPI_FAN_NONE = 0, /* No fan status or control */ 8099 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 8100 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 8101 }; 8102 8103 enum fan_control_access_mode { 8104 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 8105 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 8106 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 8107 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 8108 }; 8109 8110 enum fan_control_commands { 8111 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 8112 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 8113 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 8114 * and also watchdog cmd */ 8115 }; 8116 8117 static bool fan_control_allowed; 8118 8119 static enum fan_status_access_mode fan_status_access_mode; 8120 static enum fan_control_access_mode fan_control_access_mode; 8121 static enum fan_control_commands fan_control_commands; 8122 8123 static u8 fan_control_initial_status; 8124 static u8 fan_control_desired_level; 8125 static u8 fan_control_resume_level; 8126 static int fan_watchdog_maxinterval; 8127 8128 static struct mutex fan_mutex; 8129 8130 static void fan_watchdog_fire(struct work_struct *ignored); 8131 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 8132 8133 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 8134 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 8135 "\\FSPD", /* 600e/x, 770e, 770x */ 8136 ); /* all others */ 8137 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 8138 "JFNS", /* 770x-JL */ 8139 ); /* all others */ 8140 8141 /* 8142 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 8143 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 8144 * be in auto mode (0x80). 8145 * 8146 * This is corrected by any write to HFSP either by the driver, or 8147 * by the firmware. 8148 * 8149 * We assume 0x07 really means auto mode while this quirk is active, 8150 * as this is far more likely than the ThinkPad being in level 7, 8151 * which is only used by the firmware during thermal emergencies. 8152 * 8153 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 8154 * TP-70 (T43, R52), which are known to be buggy. 8155 */ 8156 8157 static void fan_quirk1_setup(void) 8158 { 8159 if (fan_control_initial_status == 0x07) { 8160 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n"); 8161 tp_features.fan_ctrl_status_undef = 1; 8162 } 8163 } 8164 8165 static void fan_quirk1_handle(u8 *fan_status) 8166 { 8167 if (unlikely(tp_features.fan_ctrl_status_undef)) { 8168 if (*fan_status != fan_control_initial_status) { 8169 /* something changed the HFSP regisnter since 8170 * driver init time, so it is not undefined 8171 * anymore */ 8172 tp_features.fan_ctrl_status_undef = 0; 8173 } else { 8174 /* Return most likely status. In fact, it 8175 * might be the only possible status */ 8176 *fan_status = TP_EC_FAN_AUTO; 8177 } 8178 } 8179 } 8180 8181 /* Select main fan on X60/X61, NOOP on others */ 8182 static bool fan_select_fan1(void) 8183 { 8184 if (tp_features.second_fan) { 8185 u8 val; 8186 8187 if (ec_read(fan_select_offset, &val) < 0) 8188 return false; 8189 val &= 0xFEU; 8190 if (ec_write(fan_select_offset, val) < 0) 8191 return false; 8192 } 8193 return true; 8194 } 8195 8196 /* Select secondary fan on X60/X61 */ 8197 static bool fan_select_fan2(void) 8198 { 8199 u8 val; 8200 8201 if (!tp_features.second_fan) 8202 return false; 8203 8204 if (ec_read(fan_select_offset, &val) < 0) 8205 return false; 8206 val |= 0x01U; 8207 if (ec_write(fan_select_offset, val) < 0) 8208 return false; 8209 8210 return true; 8211 } 8212 8213 /* 8214 * Call with fan_mutex held 8215 */ 8216 static void fan_update_desired_level(u8 status) 8217 { 8218 if ((status & 8219 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8220 if (status > 7) 8221 fan_control_desired_level = 7; 8222 else 8223 fan_control_desired_level = status; 8224 } 8225 } 8226 8227 static int fan_get_status(u8 *status) 8228 { 8229 u8 s; 8230 8231 /* TODO: 8232 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8233 8234 switch (fan_status_access_mode) { 8235 case TPACPI_FAN_RD_ACPI_GFAN: { 8236 /* 570, 600e/x, 770e, 770x */ 8237 int res; 8238 8239 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8240 return -EIO; 8241 8242 if (likely(status)) 8243 *status = res & 0x07; 8244 8245 break; 8246 } 8247 case TPACPI_FAN_RD_TPEC: 8248 /* all except 570, 600e/x, 770e, 770x */ 8249 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8250 return -EIO; 8251 8252 if (likely(status)) { 8253 *status = s; 8254 fan_quirk1_handle(status); 8255 } 8256 8257 break; 8258 8259 default: 8260 return -ENXIO; 8261 } 8262 8263 return 0; 8264 } 8265 8266 static int fan_get_status_safe(u8 *status) 8267 { 8268 int rc; 8269 u8 s; 8270 8271 if (mutex_lock_killable(&fan_mutex)) 8272 return -ERESTARTSYS; 8273 rc = fan_get_status(&s); 8274 if (!rc) 8275 fan_update_desired_level(s); 8276 mutex_unlock(&fan_mutex); 8277 8278 if (rc) 8279 return rc; 8280 if (status) 8281 *status = s; 8282 8283 return 0; 8284 } 8285 8286 static int fan_get_speed(unsigned int *speed) 8287 { 8288 u8 hi, lo; 8289 8290 switch (fan_status_access_mode) { 8291 case TPACPI_FAN_RD_TPEC: 8292 /* all except 570, 600e/x, 770e, 770x */ 8293 if (unlikely(!fan_select_fan1())) 8294 return -EIO; 8295 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8296 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8297 return -EIO; 8298 8299 if (likely(speed)) 8300 *speed = (hi << 8) | lo; 8301 8302 break; 8303 8304 default: 8305 return -ENXIO; 8306 } 8307 8308 return 0; 8309 } 8310 8311 static int fan2_get_speed(unsigned int *speed) 8312 { 8313 u8 hi, lo; 8314 bool rc; 8315 8316 switch (fan_status_access_mode) { 8317 case TPACPI_FAN_RD_TPEC: 8318 /* all except 570, 600e/x, 770e, 770x */ 8319 if (unlikely(!fan_select_fan2())) 8320 return -EIO; 8321 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8322 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8323 fan_select_fan1(); /* play it safe */ 8324 if (rc) 8325 return -EIO; 8326 8327 if (likely(speed)) 8328 *speed = (hi << 8) | lo; 8329 8330 break; 8331 8332 default: 8333 return -ENXIO; 8334 } 8335 8336 return 0; 8337 } 8338 8339 static int fan_set_level(int level) 8340 { 8341 if (!fan_control_allowed) 8342 return -EPERM; 8343 8344 switch (fan_control_access_mode) { 8345 case TPACPI_FAN_WR_ACPI_SFAN: 8346 if (level >= 0 && level <= 7) { 8347 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8348 return -EIO; 8349 } else 8350 return -EINVAL; 8351 break; 8352 8353 case TPACPI_FAN_WR_ACPI_FANS: 8354 case TPACPI_FAN_WR_TPEC: 8355 if (!(level & TP_EC_FAN_AUTO) && 8356 !(level & TP_EC_FAN_FULLSPEED) && 8357 ((level < 0) || (level > 7))) 8358 return -EINVAL; 8359 8360 /* safety net should the EC not support AUTO 8361 * or FULLSPEED mode bits and just ignore them */ 8362 if (level & TP_EC_FAN_FULLSPEED) 8363 level |= 7; /* safety min speed 7 */ 8364 else if (level & TP_EC_FAN_AUTO) 8365 level |= 4; /* safety min speed 4 */ 8366 8367 if (!acpi_ec_write(fan_status_offset, level)) 8368 return -EIO; 8369 else 8370 tp_features.fan_ctrl_status_undef = 0; 8371 break; 8372 8373 default: 8374 return -ENXIO; 8375 } 8376 8377 vdbg_printk(TPACPI_DBG_FAN, 8378 "fan control: set fan control register to 0x%02x\n", level); 8379 return 0; 8380 } 8381 8382 static int fan_set_level_safe(int level) 8383 { 8384 int rc; 8385 8386 if (!fan_control_allowed) 8387 return -EPERM; 8388 8389 if (mutex_lock_killable(&fan_mutex)) 8390 return -ERESTARTSYS; 8391 8392 if (level == TPACPI_FAN_LAST_LEVEL) 8393 level = fan_control_desired_level; 8394 8395 rc = fan_set_level(level); 8396 if (!rc) 8397 fan_update_desired_level(level); 8398 8399 mutex_unlock(&fan_mutex); 8400 return rc; 8401 } 8402 8403 static int fan_set_enable(void) 8404 { 8405 u8 s; 8406 int rc; 8407 8408 if (!fan_control_allowed) 8409 return -EPERM; 8410 8411 if (mutex_lock_killable(&fan_mutex)) 8412 return -ERESTARTSYS; 8413 8414 switch (fan_control_access_mode) { 8415 case TPACPI_FAN_WR_ACPI_FANS: 8416 case TPACPI_FAN_WR_TPEC: 8417 rc = fan_get_status(&s); 8418 if (rc < 0) 8419 break; 8420 8421 /* Don't go out of emergency fan mode */ 8422 if (s != 7) { 8423 s &= 0x07; 8424 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8425 } 8426 8427 if (!acpi_ec_write(fan_status_offset, s)) 8428 rc = -EIO; 8429 else { 8430 tp_features.fan_ctrl_status_undef = 0; 8431 rc = 0; 8432 } 8433 break; 8434 8435 case TPACPI_FAN_WR_ACPI_SFAN: 8436 rc = fan_get_status(&s); 8437 if (rc < 0) 8438 break; 8439 8440 s &= 0x07; 8441 8442 /* Set fan to at least level 4 */ 8443 s |= 4; 8444 8445 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8446 rc = -EIO; 8447 else 8448 rc = 0; 8449 break; 8450 8451 default: 8452 rc = -ENXIO; 8453 } 8454 8455 mutex_unlock(&fan_mutex); 8456 8457 if (!rc) 8458 vdbg_printk(TPACPI_DBG_FAN, 8459 "fan control: set fan control register to 0x%02x\n", 8460 s); 8461 return rc; 8462 } 8463 8464 static int fan_set_disable(void) 8465 { 8466 int rc; 8467 8468 if (!fan_control_allowed) 8469 return -EPERM; 8470 8471 if (mutex_lock_killable(&fan_mutex)) 8472 return -ERESTARTSYS; 8473 8474 rc = 0; 8475 switch (fan_control_access_mode) { 8476 case TPACPI_FAN_WR_ACPI_FANS: 8477 case TPACPI_FAN_WR_TPEC: 8478 if (!acpi_ec_write(fan_status_offset, 0x00)) 8479 rc = -EIO; 8480 else { 8481 fan_control_desired_level = 0; 8482 tp_features.fan_ctrl_status_undef = 0; 8483 } 8484 break; 8485 8486 case TPACPI_FAN_WR_ACPI_SFAN: 8487 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8488 rc = -EIO; 8489 else 8490 fan_control_desired_level = 0; 8491 break; 8492 8493 default: 8494 rc = -ENXIO; 8495 } 8496 8497 if (!rc) 8498 vdbg_printk(TPACPI_DBG_FAN, 8499 "fan control: set fan control register to 0\n"); 8500 8501 mutex_unlock(&fan_mutex); 8502 return rc; 8503 } 8504 8505 static int fan_set_speed(int speed) 8506 { 8507 int rc; 8508 8509 if (!fan_control_allowed) 8510 return -EPERM; 8511 8512 if (mutex_lock_killable(&fan_mutex)) 8513 return -ERESTARTSYS; 8514 8515 rc = 0; 8516 switch (fan_control_access_mode) { 8517 case TPACPI_FAN_WR_ACPI_FANS: 8518 if (speed >= 0 && speed <= 65535) { 8519 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8520 speed, speed, speed)) 8521 rc = -EIO; 8522 } else 8523 rc = -EINVAL; 8524 break; 8525 8526 default: 8527 rc = -ENXIO; 8528 } 8529 8530 mutex_unlock(&fan_mutex); 8531 return rc; 8532 } 8533 8534 static void fan_watchdog_reset(void) 8535 { 8536 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8537 return; 8538 8539 if (fan_watchdog_maxinterval > 0 && 8540 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8541 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8542 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8543 else 8544 cancel_delayed_work(&fan_watchdog_task); 8545 } 8546 8547 static void fan_watchdog_fire(struct work_struct *ignored) 8548 { 8549 int rc; 8550 8551 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8552 return; 8553 8554 pr_notice("fan watchdog: enabling fan\n"); 8555 rc = fan_set_enable(); 8556 if (rc < 0) { 8557 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n", 8558 rc); 8559 /* reschedule for later */ 8560 fan_watchdog_reset(); 8561 } 8562 } 8563 8564 /* 8565 * SYSFS fan layout: hwmon compatible (device) 8566 * 8567 * pwm*_enable: 8568 * 0: "disengaged" mode 8569 * 1: manual mode 8570 * 2: native EC "auto" mode (recommended, hardware default) 8571 * 8572 * pwm*: set speed in manual mode, ignored otherwise. 8573 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8574 * interpolation. 8575 * 8576 * fan*_input: tachometer reading, RPM 8577 * 8578 * 8579 * SYSFS fan layout: extensions 8580 * 8581 * fan_watchdog (driver): 8582 * fan watchdog interval in seconds, 0 disables (default), max 120 8583 */ 8584 8585 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8586 static ssize_t fan_pwm1_enable_show(struct device *dev, 8587 struct device_attribute *attr, 8588 char *buf) 8589 { 8590 int res, mode; 8591 u8 status; 8592 8593 res = fan_get_status_safe(&status); 8594 if (res) 8595 return res; 8596 8597 if (status & TP_EC_FAN_FULLSPEED) { 8598 mode = 0; 8599 } else if (status & TP_EC_FAN_AUTO) { 8600 mode = 2; 8601 } else 8602 mode = 1; 8603 8604 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8605 } 8606 8607 static ssize_t fan_pwm1_enable_store(struct device *dev, 8608 struct device_attribute *attr, 8609 const char *buf, size_t count) 8610 { 8611 unsigned long t; 8612 int res, level; 8613 8614 if (parse_strtoul(buf, 2, &t)) 8615 return -EINVAL; 8616 8617 tpacpi_disclose_usertask("hwmon pwm1_enable", 8618 "set fan mode to %lu\n", t); 8619 8620 switch (t) { 8621 case 0: 8622 level = TP_EC_FAN_FULLSPEED; 8623 break; 8624 case 1: 8625 level = TPACPI_FAN_LAST_LEVEL; 8626 break; 8627 case 2: 8628 level = TP_EC_FAN_AUTO; 8629 break; 8630 case 3: 8631 /* reserved for software-controlled auto mode */ 8632 return -ENOSYS; 8633 default: 8634 return -EINVAL; 8635 } 8636 8637 res = fan_set_level_safe(level); 8638 if (res == -ENXIO) 8639 return -EINVAL; 8640 else if (res < 0) 8641 return res; 8642 8643 fan_watchdog_reset(); 8644 8645 return count; 8646 } 8647 8648 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8649 fan_pwm1_enable_show, fan_pwm1_enable_store); 8650 8651 /* sysfs fan pwm1 ------------------------------------------------------ */ 8652 static ssize_t fan_pwm1_show(struct device *dev, 8653 struct device_attribute *attr, 8654 char *buf) 8655 { 8656 int res; 8657 u8 status; 8658 8659 res = fan_get_status_safe(&status); 8660 if (res) 8661 return res; 8662 8663 if ((status & 8664 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8665 status = fan_control_desired_level; 8666 8667 if (status > 7) 8668 status = 7; 8669 8670 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8671 } 8672 8673 static ssize_t fan_pwm1_store(struct device *dev, 8674 struct device_attribute *attr, 8675 const char *buf, size_t count) 8676 { 8677 unsigned long s; 8678 int rc; 8679 u8 status, newlevel; 8680 8681 if (parse_strtoul(buf, 255, &s)) 8682 return -EINVAL; 8683 8684 tpacpi_disclose_usertask("hwmon pwm1", 8685 "set fan speed to %lu\n", s); 8686 8687 /* scale down from 0-255 to 0-7 */ 8688 newlevel = (s >> 5) & 0x07; 8689 8690 if (mutex_lock_killable(&fan_mutex)) 8691 return -ERESTARTSYS; 8692 8693 rc = fan_get_status(&status); 8694 if (!rc && (status & 8695 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8696 rc = fan_set_level(newlevel); 8697 if (rc == -ENXIO) 8698 rc = -EINVAL; 8699 else if (!rc) { 8700 fan_update_desired_level(newlevel); 8701 fan_watchdog_reset(); 8702 } 8703 } 8704 8705 mutex_unlock(&fan_mutex); 8706 return (rc) ? rc : count; 8707 } 8708 8709 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8710 8711 /* sysfs fan fan1_input ------------------------------------------------ */ 8712 static ssize_t fan_fan1_input_show(struct device *dev, 8713 struct device_attribute *attr, 8714 char *buf) 8715 { 8716 int res; 8717 unsigned int speed; 8718 8719 res = fan_get_speed(&speed); 8720 if (res < 0) 8721 return res; 8722 8723 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8724 } 8725 8726 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8727 8728 /* sysfs fan fan2_input ------------------------------------------------ */ 8729 static ssize_t fan_fan2_input_show(struct device *dev, 8730 struct device_attribute *attr, 8731 char *buf) 8732 { 8733 int res; 8734 unsigned int speed; 8735 8736 res = fan2_get_speed(&speed); 8737 if (res < 0) 8738 return res; 8739 8740 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8741 } 8742 8743 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8744 8745 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8746 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf) 8747 { 8748 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8749 } 8750 8751 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf, 8752 size_t count) 8753 { 8754 unsigned long t; 8755 8756 if (parse_strtoul(buf, 120, &t)) 8757 return -EINVAL; 8758 8759 if (!fan_control_allowed) 8760 return -EPERM; 8761 8762 fan_watchdog_maxinterval = t; 8763 fan_watchdog_reset(); 8764 8765 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8766 8767 return count; 8768 } 8769 static DRIVER_ATTR_RW(fan_watchdog); 8770 8771 /* --------------------------------------------------------------------- */ 8772 static struct attribute *fan_attributes[] = { 8773 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8774 &dev_attr_fan1_input.attr, 8775 NULL, /* for fan2_input */ 8776 NULL 8777 }; 8778 8779 static const struct attribute_group fan_attr_group = { 8780 .attrs = fan_attributes, 8781 }; 8782 8783 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8784 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8785 8786 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8787 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1), 8788 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1), 8789 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1), 8790 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1), 8791 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN), 8792 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN), 8793 }; 8794 8795 static int __init fan_init(struct ibm_init_struct *iibm) 8796 { 8797 int rc; 8798 unsigned long quirks; 8799 8800 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8801 "initializing fan subdriver\n"); 8802 8803 mutex_init(&fan_mutex); 8804 fan_status_access_mode = TPACPI_FAN_NONE; 8805 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8806 fan_control_commands = 0; 8807 fan_watchdog_maxinterval = 0; 8808 tp_features.fan_ctrl_status_undef = 0; 8809 tp_features.second_fan = 0; 8810 fan_control_desired_level = 7; 8811 8812 if (tpacpi_is_ibm()) { 8813 TPACPI_ACPIHANDLE_INIT(fans); 8814 TPACPI_ACPIHANDLE_INIT(gfan); 8815 TPACPI_ACPIHANDLE_INIT(sfan); 8816 } 8817 8818 quirks = tpacpi_check_quirks(fan_quirk_table, 8819 ARRAY_SIZE(fan_quirk_table)); 8820 8821 if (gfan_handle) { 8822 /* 570, 600e/x, 770e, 770x */ 8823 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8824 } else { 8825 /* all other ThinkPads: note that even old-style 8826 * ThinkPad ECs supports the fan control register */ 8827 if (likely(acpi_ec_read(fan_status_offset, 8828 &fan_control_initial_status))) { 8829 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8830 if (quirks & TPACPI_FAN_Q1) 8831 fan_quirk1_setup(); 8832 if (quirks & TPACPI_FAN_2FAN) { 8833 tp_features.second_fan = 1; 8834 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8835 "secondary fan support enabled\n"); 8836 } 8837 } else { 8838 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n"); 8839 return 1; 8840 } 8841 } 8842 8843 if (sfan_handle) { 8844 /* 570, 770x-JL */ 8845 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8846 fan_control_commands |= 8847 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8848 } else { 8849 if (!gfan_handle) { 8850 /* gfan without sfan means no fan control */ 8851 /* all other models implement TP EC 0x2f control */ 8852 8853 if (fans_handle) { 8854 /* X31, X40, X41 */ 8855 fan_control_access_mode = 8856 TPACPI_FAN_WR_ACPI_FANS; 8857 fan_control_commands |= 8858 TPACPI_FAN_CMD_SPEED | 8859 TPACPI_FAN_CMD_LEVEL | 8860 TPACPI_FAN_CMD_ENABLE; 8861 } else { 8862 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8863 fan_control_commands |= 8864 TPACPI_FAN_CMD_LEVEL | 8865 TPACPI_FAN_CMD_ENABLE; 8866 } 8867 } 8868 } 8869 8870 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8871 "fan is %s, modes %d, %d\n", 8872 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8873 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8874 fan_status_access_mode, fan_control_access_mode); 8875 8876 /* fan control master switch */ 8877 if (!fan_control_allowed) { 8878 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8879 fan_control_commands = 0; 8880 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8881 "fan control features disabled by parameter\n"); 8882 } 8883 8884 /* update fan_control_desired_level */ 8885 if (fan_status_access_mode != TPACPI_FAN_NONE) 8886 fan_get_status_safe(NULL); 8887 8888 if (fan_status_access_mode != TPACPI_FAN_NONE || 8889 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8890 if (tp_features.second_fan) { 8891 /* attach second fan tachometer */ 8892 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8893 &dev_attr_fan2_input.attr; 8894 } 8895 rc = sysfs_create_group(&tpacpi_hwmon->kobj, 8896 &fan_attr_group); 8897 if (rc < 0) 8898 return rc; 8899 8900 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8901 &driver_attr_fan_watchdog); 8902 if (rc < 0) { 8903 sysfs_remove_group(&tpacpi_hwmon->kobj, 8904 &fan_attr_group); 8905 return rc; 8906 } 8907 return 0; 8908 } else 8909 return 1; 8910 } 8911 8912 static void fan_exit(void) 8913 { 8914 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8915 "cancelling any pending fan watchdog tasks\n"); 8916 8917 /* FIXME: can we really do this unconditionally? */ 8918 sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group); 8919 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8920 &driver_attr_fan_watchdog); 8921 8922 cancel_delayed_work(&fan_watchdog_task); 8923 flush_workqueue(tpacpi_wq); 8924 } 8925 8926 static void fan_suspend(void) 8927 { 8928 int rc; 8929 8930 if (!fan_control_allowed) 8931 return; 8932 8933 /* Store fan status in cache */ 8934 fan_control_resume_level = 0; 8935 rc = fan_get_status_safe(&fan_control_resume_level); 8936 if (rc < 0) 8937 pr_notice("failed to read fan level for later restore during resume: %d\n", 8938 rc); 8939 8940 /* if it is undefined, don't attempt to restore it. 8941 * KEEP THIS LAST */ 8942 if (tp_features.fan_ctrl_status_undef) 8943 fan_control_resume_level = 0; 8944 } 8945 8946 static void fan_resume(void) 8947 { 8948 u8 current_level = 7; 8949 bool do_set = false; 8950 int rc; 8951 8952 /* DSDT *always* updates status on resume */ 8953 tp_features.fan_ctrl_status_undef = 0; 8954 8955 if (!fan_control_allowed || 8956 !fan_control_resume_level || 8957 (fan_get_status_safe(¤t_level) < 0)) 8958 return; 8959 8960 switch (fan_control_access_mode) { 8961 case TPACPI_FAN_WR_ACPI_SFAN: 8962 /* never decrease fan level */ 8963 do_set = (fan_control_resume_level > current_level); 8964 break; 8965 case TPACPI_FAN_WR_ACPI_FANS: 8966 case TPACPI_FAN_WR_TPEC: 8967 /* never decrease fan level, scale is: 8968 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8969 * 8970 * We expect the firmware to set either 7 or AUTO, but we 8971 * handle FULLSPEED out of paranoia. 8972 * 8973 * So, we can safely only restore FULLSPEED or 7, anything 8974 * else could slow the fan. Restoring AUTO is useless, at 8975 * best that's exactly what the DSDT already set (it is the 8976 * slower it uses). 8977 * 8978 * Always keep in mind that the DSDT *will* have set the 8979 * fans to what the vendor supposes is the best level. We 8980 * muck with it only to speed the fan up. 8981 */ 8982 if (fan_control_resume_level != 7 && 8983 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8984 return; 8985 else 8986 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8987 (current_level != fan_control_resume_level); 8988 break; 8989 default: 8990 return; 8991 } 8992 if (do_set) { 8993 pr_notice("restoring fan level to 0x%02x\n", 8994 fan_control_resume_level); 8995 rc = fan_set_level_safe(fan_control_resume_level); 8996 if (rc < 0) 8997 pr_notice("failed to restore fan level: %d\n", rc); 8998 } 8999 } 9000 9001 static int fan_read(struct seq_file *m) 9002 { 9003 int rc; 9004 u8 status; 9005 unsigned int speed = 0; 9006 9007 switch (fan_status_access_mode) { 9008 case TPACPI_FAN_RD_ACPI_GFAN: 9009 /* 570, 600e/x, 770e, 770x */ 9010 rc = fan_get_status_safe(&status); 9011 if (rc < 0) 9012 return rc; 9013 9014 seq_printf(m, "status:\t\t%s\n" 9015 "level:\t\t%d\n", 9016 (status != 0) ? "enabled" : "disabled", status); 9017 break; 9018 9019 case TPACPI_FAN_RD_TPEC: 9020 /* all except 570, 600e/x, 770e, 770x */ 9021 rc = fan_get_status_safe(&status); 9022 if (rc < 0) 9023 return rc; 9024 9025 seq_printf(m, "status:\t\t%s\n", 9026 (status != 0) ? "enabled" : "disabled"); 9027 9028 rc = fan_get_speed(&speed); 9029 if (rc < 0) 9030 return rc; 9031 9032 seq_printf(m, "speed:\t\t%d\n", speed); 9033 9034 if (status & TP_EC_FAN_FULLSPEED) 9035 /* Disengaged mode takes precedence */ 9036 seq_printf(m, "level:\t\tdisengaged\n"); 9037 else if (status & TP_EC_FAN_AUTO) 9038 seq_printf(m, "level:\t\tauto\n"); 9039 else 9040 seq_printf(m, "level:\t\t%d\n", status); 9041 break; 9042 9043 case TPACPI_FAN_NONE: 9044 default: 9045 seq_printf(m, "status:\t\tnot supported\n"); 9046 } 9047 9048 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 9049 seq_printf(m, "commands:\tlevel <level>"); 9050 9051 switch (fan_control_access_mode) { 9052 case TPACPI_FAN_WR_ACPI_SFAN: 9053 seq_printf(m, " (<level> is 0-7)\n"); 9054 break; 9055 9056 default: 9057 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n"); 9058 break; 9059 } 9060 } 9061 9062 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 9063 seq_printf(m, "commands:\tenable, disable\n" 9064 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n"); 9065 9066 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 9067 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n"); 9068 9069 return 0; 9070 } 9071 9072 static int fan_write_cmd_level(const char *cmd, int *rc) 9073 { 9074 int level; 9075 9076 if (strlencmp(cmd, "level auto") == 0) 9077 level = TP_EC_FAN_AUTO; 9078 else if ((strlencmp(cmd, "level disengaged") == 0) | 9079 (strlencmp(cmd, "level full-speed") == 0)) 9080 level = TP_EC_FAN_FULLSPEED; 9081 else if (sscanf(cmd, "level %d", &level) != 1) 9082 return 0; 9083 9084 *rc = fan_set_level_safe(level); 9085 if (*rc == -ENXIO) 9086 pr_err("level command accepted for unsupported access mode %d\n", 9087 fan_control_access_mode); 9088 else if (!*rc) 9089 tpacpi_disclose_usertask("procfs fan", 9090 "set level to %d\n", level); 9091 9092 return 1; 9093 } 9094 9095 static int fan_write_cmd_enable(const char *cmd, int *rc) 9096 { 9097 if (strlencmp(cmd, "enable") != 0) 9098 return 0; 9099 9100 *rc = fan_set_enable(); 9101 if (*rc == -ENXIO) 9102 pr_err("enable command accepted for unsupported access mode %d\n", 9103 fan_control_access_mode); 9104 else if (!*rc) 9105 tpacpi_disclose_usertask("procfs fan", "enable\n"); 9106 9107 return 1; 9108 } 9109 9110 static int fan_write_cmd_disable(const char *cmd, int *rc) 9111 { 9112 if (strlencmp(cmd, "disable") != 0) 9113 return 0; 9114 9115 *rc = fan_set_disable(); 9116 if (*rc == -ENXIO) 9117 pr_err("disable command accepted for unsupported access mode %d\n", 9118 fan_control_access_mode); 9119 else if (!*rc) 9120 tpacpi_disclose_usertask("procfs fan", "disable\n"); 9121 9122 return 1; 9123 } 9124 9125 static int fan_write_cmd_speed(const char *cmd, int *rc) 9126 { 9127 int speed; 9128 9129 /* TODO: 9130 * Support speed <low> <medium> <high> ? */ 9131 9132 if (sscanf(cmd, "speed %d", &speed) != 1) 9133 return 0; 9134 9135 *rc = fan_set_speed(speed); 9136 if (*rc == -ENXIO) 9137 pr_err("speed command accepted for unsupported access mode %d\n", 9138 fan_control_access_mode); 9139 else if (!*rc) 9140 tpacpi_disclose_usertask("procfs fan", 9141 "set speed to %d\n", speed); 9142 9143 return 1; 9144 } 9145 9146 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 9147 { 9148 int interval; 9149 9150 if (sscanf(cmd, "watchdog %d", &interval) != 1) 9151 return 0; 9152 9153 if (interval < 0 || interval > 120) 9154 *rc = -EINVAL; 9155 else { 9156 fan_watchdog_maxinterval = interval; 9157 tpacpi_disclose_usertask("procfs fan", 9158 "set watchdog timer to %d\n", 9159 interval); 9160 } 9161 9162 return 1; 9163 } 9164 9165 static int fan_write(char *buf) 9166 { 9167 char *cmd; 9168 int rc = 0; 9169 9170 while (!rc && (cmd = next_cmd(&buf))) { 9171 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 9172 fan_write_cmd_level(cmd, &rc)) && 9173 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 9174 (fan_write_cmd_enable(cmd, &rc) || 9175 fan_write_cmd_disable(cmd, &rc) || 9176 fan_write_cmd_watchdog(cmd, &rc))) && 9177 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 9178 fan_write_cmd_speed(cmd, &rc)) 9179 ) 9180 rc = -EINVAL; 9181 else if (!rc) 9182 fan_watchdog_reset(); 9183 } 9184 9185 return rc; 9186 } 9187 9188 static struct ibm_struct fan_driver_data = { 9189 .name = "fan", 9190 .read = fan_read, 9191 .write = fan_write, 9192 .exit = fan_exit, 9193 .suspend = fan_suspend, 9194 .resume = fan_resume, 9195 }; 9196 9197 /************************************************************************* 9198 * Mute LED subdriver 9199 */ 9200 9201 #define TPACPI_LED_MAX 2 9202 9203 struct tp_led_table { 9204 acpi_string name; 9205 int on_value; 9206 int off_value; 9207 int state; 9208 }; 9209 9210 static struct tp_led_table led_tables[TPACPI_LED_MAX] = { 9211 [LED_AUDIO_MUTE] = { 9212 .name = "SSMS", 9213 .on_value = 1, 9214 .off_value = 0, 9215 }, 9216 [LED_AUDIO_MICMUTE] = { 9217 .name = "MMTS", 9218 .on_value = 2, 9219 .off_value = 0, 9220 }, 9221 }; 9222 9223 static int mute_led_on_off(struct tp_led_table *t, bool state) 9224 { 9225 acpi_handle temp; 9226 int output; 9227 9228 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9229 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9230 return -EIO; 9231 } 9232 9233 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9234 state ? t->on_value : t->off_value)) 9235 return -EIO; 9236 9237 t->state = state; 9238 return state; 9239 } 9240 9241 static int tpacpi_led_set(int whichled, bool on) 9242 { 9243 struct tp_led_table *t; 9244 9245 t = &led_tables[whichled]; 9246 if (t->state < 0 || t->state == on) 9247 return t->state; 9248 return mute_led_on_off(t, on); 9249 } 9250 9251 static int tpacpi_led_mute_set(struct led_classdev *led_cdev, 9252 enum led_brightness brightness) 9253 { 9254 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF); 9255 } 9256 9257 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev, 9258 enum led_brightness brightness) 9259 { 9260 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF); 9261 } 9262 9263 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = { 9264 [LED_AUDIO_MUTE] = { 9265 .name = "platform::mute", 9266 .max_brightness = 1, 9267 .brightness_set_blocking = tpacpi_led_mute_set, 9268 .default_trigger = "audio-mute", 9269 }, 9270 [LED_AUDIO_MICMUTE] = { 9271 .name = "platform::micmute", 9272 .max_brightness = 1, 9273 .brightness_set_blocking = tpacpi_led_micmute_set, 9274 .default_trigger = "audio-micmute", 9275 }, 9276 }; 9277 9278 static int mute_led_init(struct ibm_init_struct *iibm) 9279 { 9280 acpi_handle temp; 9281 int i, err; 9282 9283 for (i = 0; i < TPACPI_LED_MAX; i++) { 9284 struct tp_led_table *t = &led_tables[i]; 9285 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9286 t->state = -ENODEV; 9287 continue; 9288 } 9289 9290 mute_led_cdev[i].brightness = ledtrig_audio_get(i); 9291 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]); 9292 if (err < 0) { 9293 while (i--) { 9294 if (led_tables[i].state >= 0) 9295 led_classdev_unregister(&mute_led_cdev[i]); 9296 } 9297 return err; 9298 } 9299 } 9300 return 0; 9301 } 9302 9303 static void mute_led_exit(void) 9304 { 9305 int i; 9306 9307 for (i = 0; i < TPACPI_LED_MAX; i++) { 9308 if (led_tables[i].state >= 0) { 9309 led_classdev_unregister(&mute_led_cdev[i]); 9310 tpacpi_led_set(i, false); 9311 } 9312 } 9313 } 9314 9315 static void mute_led_resume(void) 9316 { 9317 int i; 9318 9319 for (i = 0; i < TPACPI_LED_MAX; i++) { 9320 struct tp_led_table *t = &led_tables[i]; 9321 if (t->state >= 0) 9322 mute_led_on_off(t, t->state); 9323 } 9324 } 9325 9326 static struct ibm_struct mute_led_driver_data = { 9327 .name = "mute_led", 9328 .exit = mute_led_exit, 9329 .resume = mute_led_resume, 9330 }; 9331 9332 /* 9333 * Battery Wear Control Driver 9334 * Contact: Ognjen Galic <smclt30p@gmail.com> 9335 */ 9336 9337 /* Metadata */ 9338 9339 #define GET_START "BCTG" 9340 #define SET_START "BCCS" 9341 #define GET_STOP "BCSG" 9342 #define SET_STOP "BCSS" 9343 9344 #define START_ATTR "charge_start_threshold" 9345 #define STOP_ATTR "charge_stop_threshold" 9346 9347 enum { 9348 BAT_ANY = 0, 9349 BAT_PRIMARY = 1, 9350 BAT_SECONDARY = 2 9351 }; 9352 9353 enum { 9354 /* Error condition bit */ 9355 METHOD_ERR = BIT(31), 9356 }; 9357 9358 enum { 9359 /* This is used in the get/set helpers */ 9360 THRESHOLD_START, 9361 THRESHOLD_STOP, 9362 }; 9363 9364 struct tpacpi_battery_data { 9365 int charge_start; 9366 int start_support; 9367 int charge_stop; 9368 int stop_support; 9369 }; 9370 9371 struct tpacpi_battery_driver_data { 9372 struct tpacpi_battery_data batteries[3]; 9373 int individual_addressing; 9374 }; 9375 9376 static struct tpacpi_battery_driver_data battery_info; 9377 9378 /* ACPI helpers/functions/probes */ 9379 9380 /** 9381 * This evaluates a ACPI method call specific to the battery 9382 * ACPI extension. The specifics are that an error is marked 9383 * in the 32rd bit of the response, so we just check that here. 9384 */ 9385 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param) 9386 { 9387 int response; 9388 9389 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) { 9390 acpi_handle_err(hkey_handle, "%s: evaluate failed", method); 9391 return AE_ERROR; 9392 } 9393 if (response & METHOD_ERR) { 9394 acpi_handle_err(hkey_handle, 9395 "%s evaluated but flagged as error", method); 9396 return AE_ERROR; 9397 } 9398 *ret = response; 9399 return AE_OK; 9400 } 9401 9402 static int tpacpi_battery_get(int what, int battery, int *ret) 9403 { 9404 switch (what) { 9405 case THRESHOLD_START: 9406 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery)) 9407 return -ENODEV; 9408 9409 /* The value is in the low 8 bits of the response */ 9410 *ret = *ret & 0xFF; 9411 return 0; 9412 case THRESHOLD_STOP: 9413 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery)) 9414 return -ENODEV; 9415 /* Value is in lower 8 bits */ 9416 *ret = *ret & 0xFF; 9417 /* 9418 * On the stop value, if we return 0 that 9419 * does not make any sense. 0 means Default, which 9420 * means that charging stops at 100%, so we return 9421 * that. 9422 */ 9423 if (*ret == 0) 9424 *ret = 100; 9425 return 0; 9426 default: 9427 pr_crit("wrong parameter: %d", what); 9428 return -EINVAL; 9429 } 9430 } 9431 9432 static int tpacpi_battery_set(int what, int battery, int value) 9433 { 9434 int param, ret; 9435 /* The first 8 bits are the value of the threshold */ 9436 param = value; 9437 /* The battery ID is in bits 8-9, 2 bits */ 9438 param |= battery << 8; 9439 9440 switch (what) { 9441 case THRESHOLD_START: 9442 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) { 9443 pr_err("failed to set charge threshold on battery %d", 9444 battery); 9445 return -ENODEV; 9446 } 9447 return 0; 9448 case THRESHOLD_STOP: 9449 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) { 9450 pr_err("failed to set stop threshold: %d", battery); 9451 return -ENODEV; 9452 } 9453 return 0; 9454 default: 9455 pr_crit("wrong parameter: %d", what); 9456 return -EINVAL; 9457 } 9458 } 9459 9460 static int tpacpi_battery_probe(int battery) 9461 { 9462 int ret = 0; 9463 9464 memset(&battery_info.batteries[battery], 0, 9465 sizeof(battery_info.batteries[battery])); 9466 9467 /* 9468 * 1) Get the current start threshold 9469 * 2) Check for support 9470 * 3) Get the current stop threshold 9471 * 4) Check for support 9472 */ 9473 if (acpi_has_method(hkey_handle, GET_START)) { 9474 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { 9475 pr_err("Error probing battery %d\n", battery); 9476 return -ENODEV; 9477 } 9478 /* Individual addressing is in bit 9 */ 9479 if (ret & BIT(9)) 9480 battery_info.individual_addressing = true; 9481 /* Support is marked in bit 8 */ 9482 if (ret & BIT(8)) 9483 battery_info.batteries[battery].start_support = 1; 9484 else 9485 return -ENODEV; 9486 if (tpacpi_battery_get(THRESHOLD_START, battery, 9487 &battery_info.batteries[battery].charge_start)) { 9488 pr_err("Error probing battery %d\n", battery); 9489 return -ENODEV; 9490 } 9491 } 9492 if (acpi_has_method(hkey_handle, GET_STOP)) { 9493 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) { 9494 pr_err("Error probing battery stop; %d\n", battery); 9495 return -ENODEV; 9496 } 9497 /* Support is marked in bit 8 */ 9498 if (ret & BIT(8)) 9499 battery_info.batteries[battery].stop_support = 1; 9500 else 9501 return -ENODEV; 9502 if (tpacpi_battery_get(THRESHOLD_STOP, battery, 9503 &battery_info.batteries[battery].charge_stop)) { 9504 pr_err("Error probing battery stop: %d\n", battery); 9505 return -ENODEV; 9506 } 9507 } 9508 pr_info("battery %d registered (start %d, stop %d)", 9509 battery, 9510 battery_info.batteries[battery].charge_start, 9511 battery_info.batteries[battery].charge_stop); 9512 9513 return 0; 9514 } 9515 9516 /* General helper functions */ 9517 9518 static int tpacpi_battery_get_id(const char *battery_name) 9519 { 9520 9521 if (strcmp(battery_name, "BAT0") == 0 || 9522 tp_features.battery_force_primary) 9523 return BAT_PRIMARY; 9524 if (strcmp(battery_name, "BAT1") == 0) 9525 return BAT_SECONDARY; 9526 /* 9527 * If for some reason the battery is not BAT0 nor is it 9528 * BAT1, we will assume it's the default, first battery, 9529 * AKA primary. 9530 */ 9531 pr_warn("unknown battery %s, assuming primary", battery_name); 9532 return BAT_PRIMARY; 9533 } 9534 9535 /* sysfs interface */ 9536 9537 static ssize_t tpacpi_battery_store(int what, 9538 struct device *dev, 9539 const char *buf, size_t count) 9540 { 9541 struct power_supply *supply = to_power_supply(dev); 9542 unsigned long value; 9543 int battery, rval; 9544 /* 9545 * Some systems have support for more than 9546 * one battery. If that is the case, 9547 * tpacpi_battery_probe marked that addressing 9548 * them individually is supported, so we do that 9549 * based on the device struct. 9550 * 9551 * On systems that are not supported, we assume 9552 * the primary as most of the ACPI calls fail 9553 * with "Any Battery" as the parameter. 9554 */ 9555 if (battery_info.individual_addressing) 9556 /* BAT_PRIMARY or BAT_SECONDARY */ 9557 battery = tpacpi_battery_get_id(supply->desc->name); 9558 else 9559 battery = BAT_PRIMARY; 9560 9561 rval = kstrtoul(buf, 10, &value); 9562 if (rval) 9563 return rval; 9564 9565 switch (what) { 9566 case THRESHOLD_START: 9567 if (!battery_info.batteries[battery].start_support) 9568 return -ENODEV; 9569 /* valid values are [0, 99] */ 9570 if (value < 0 || value > 99) 9571 return -EINVAL; 9572 if (value > battery_info.batteries[battery].charge_stop) 9573 return -EINVAL; 9574 if (tpacpi_battery_set(THRESHOLD_START, battery, value)) 9575 return -ENODEV; 9576 battery_info.batteries[battery].charge_start = value; 9577 return count; 9578 9579 case THRESHOLD_STOP: 9580 if (!battery_info.batteries[battery].stop_support) 9581 return -ENODEV; 9582 /* valid values are [1, 100] */ 9583 if (value < 1 || value > 100) 9584 return -EINVAL; 9585 if (value < battery_info.batteries[battery].charge_start) 9586 return -EINVAL; 9587 battery_info.batteries[battery].charge_stop = value; 9588 /* 9589 * When 100 is passed to stop, we need to flip 9590 * it to 0 as that the EC understands that as 9591 * "Default", which will charge to 100% 9592 */ 9593 if (value == 100) 9594 value = 0; 9595 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value)) 9596 return -EINVAL; 9597 return count; 9598 default: 9599 pr_crit("Wrong parameter: %d", what); 9600 return -EINVAL; 9601 } 9602 return count; 9603 } 9604 9605 static ssize_t tpacpi_battery_show(int what, 9606 struct device *dev, 9607 char *buf) 9608 { 9609 struct power_supply *supply = to_power_supply(dev); 9610 int ret, battery; 9611 /* 9612 * Some systems have support for more than 9613 * one battery. If that is the case, 9614 * tpacpi_battery_probe marked that addressing 9615 * them individually is supported, so we; 9616 * based on the device struct. 9617 * 9618 * On systems that are not supported, we assume 9619 * the primary as most of the ACPI calls fail 9620 * with "Any Battery" as the parameter. 9621 */ 9622 if (battery_info.individual_addressing) 9623 /* BAT_PRIMARY or BAT_SECONDARY */ 9624 battery = tpacpi_battery_get_id(supply->desc->name); 9625 else 9626 battery = BAT_PRIMARY; 9627 if (tpacpi_battery_get(what, battery, &ret)) 9628 return -ENODEV; 9629 return sprintf(buf, "%d\n", ret); 9630 } 9631 9632 static ssize_t charge_start_threshold_show(struct device *device, 9633 struct device_attribute *attr, 9634 char *buf) 9635 { 9636 return tpacpi_battery_show(THRESHOLD_START, device, buf); 9637 } 9638 9639 static ssize_t charge_stop_threshold_show(struct device *device, 9640 struct device_attribute *attr, 9641 char *buf) 9642 { 9643 return tpacpi_battery_show(THRESHOLD_STOP, device, buf); 9644 } 9645 9646 static ssize_t charge_start_threshold_store(struct device *dev, 9647 struct device_attribute *attr, 9648 const char *buf, size_t count) 9649 { 9650 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count); 9651 } 9652 9653 static ssize_t charge_stop_threshold_store(struct device *dev, 9654 struct device_attribute *attr, 9655 const char *buf, size_t count) 9656 { 9657 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count); 9658 } 9659 9660 static DEVICE_ATTR_RW(charge_start_threshold); 9661 static DEVICE_ATTR_RW(charge_stop_threshold); 9662 9663 static struct attribute *tpacpi_battery_attrs[] = { 9664 &dev_attr_charge_start_threshold.attr, 9665 &dev_attr_charge_stop_threshold.attr, 9666 NULL, 9667 }; 9668 9669 ATTRIBUTE_GROUPS(tpacpi_battery); 9670 9671 /* ACPI battery hooking */ 9672 9673 static int tpacpi_battery_add(struct power_supply *battery) 9674 { 9675 int batteryid = tpacpi_battery_get_id(battery->desc->name); 9676 9677 if (tpacpi_battery_probe(batteryid)) 9678 return -ENODEV; 9679 if (device_add_groups(&battery->dev, tpacpi_battery_groups)) 9680 return -ENODEV; 9681 return 0; 9682 } 9683 9684 static int tpacpi_battery_remove(struct power_supply *battery) 9685 { 9686 device_remove_groups(&battery->dev, tpacpi_battery_groups); 9687 return 0; 9688 } 9689 9690 static struct acpi_battery_hook battery_hook = { 9691 .add_battery = tpacpi_battery_add, 9692 .remove_battery = tpacpi_battery_remove, 9693 .name = "ThinkPad Battery Extension", 9694 }; 9695 9696 /* Subdriver init/exit */ 9697 9698 static const struct tpacpi_quirk battery_quirk_table[] __initconst = { 9699 /* 9700 * Individual addressing is broken on models that expose the 9701 * primary battery as BAT1. 9702 */ 9703 TPACPI_Q_LNV('J', '7', true), /* B5400 */ 9704 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */ 9705 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */ 9706 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */ 9707 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */ 9708 }; 9709 9710 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm) 9711 { 9712 memset(&battery_info, 0, sizeof(battery_info)); 9713 9714 tp_features.battery_force_primary = tpacpi_check_quirks( 9715 battery_quirk_table, 9716 ARRAY_SIZE(battery_quirk_table)); 9717 9718 battery_hook_register(&battery_hook); 9719 return 0; 9720 } 9721 9722 static void tpacpi_battery_exit(void) 9723 { 9724 battery_hook_unregister(&battery_hook); 9725 } 9726 9727 static struct ibm_struct battery_driver_data = { 9728 .name = "battery", 9729 .exit = tpacpi_battery_exit, 9730 }; 9731 9732 /**************************************************************************** 9733 **************************************************************************** 9734 * 9735 * Infrastructure 9736 * 9737 **************************************************************************** 9738 ****************************************************************************/ 9739 9740 /* 9741 * HKEY event callout for other subdrivers go here 9742 * (yes, it is ugly, but it is quick, safe, and gets the job done 9743 */ 9744 static void tpacpi_driver_event(const unsigned int hkey_event) 9745 { 9746 if (ibm_backlight_device) { 9747 switch (hkey_event) { 9748 case TP_HKEY_EV_BRGHT_UP: 9749 case TP_HKEY_EV_BRGHT_DOWN: 9750 tpacpi_brightness_notify_change(); 9751 } 9752 } 9753 if (alsa_card) { 9754 switch (hkey_event) { 9755 case TP_HKEY_EV_VOL_UP: 9756 case TP_HKEY_EV_VOL_DOWN: 9757 case TP_HKEY_EV_VOL_MUTE: 9758 volume_alsa_notify_change(); 9759 } 9760 } 9761 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) { 9762 enum led_brightness brightness; 9763 9764 mutex_lock(&kbdlight_mutex); 9765 9766 /* 9767 * Check the brightness actually changed, setting the brightness 9768 * through kbdlight_set_level() also triggers this event. 9769 */ 9770 brightness = kbdlight_sysfs_get(NULL); 9771 if (kbdlight_brightness != brightness) { 9772 kbdlight_brightness = brightness; 9773 led_classdev_notify_brightness_hw_changed( 9774 &tpacpi_led_kbdlight.led_classdev, brightness); 9775 } 9776 9777 mutex_unlock(&kbdlight_mutex); 9778 } 9779 } 9780 9781 static void hotkey_driver_event(const unsigned int scancode) 9782 { 9783 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9784 } 9785 9786 /* --------------------------------------------------------------------- */ 9787 9788 /* /proc support */ 9789 static struct proc_dir_entry *proc_dir; 9790 9791 /* 9792 * Module and infrastructure proble, init and exit handling 9793 */ 9794 9795 static bool force_load; 9796 9797 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9798 static const char * __init str_supported(int is_supported) 9799 { 9800 static char text_unsupported[] __initdata = "not supported"; 9801 9802 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9803 } 9804 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9805 9806 static void ibm_exit(struct ibm_struct *ibm) 9807 { 9808 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9809 9810 list_del_init(&ibm->all_drivers); 9811 9812 if (ibm->flags.acpi_notify_installed) { 9813 dbg_printk(TPACPI_DBG_EXIT, 9814 "%s: acpi_remove_notify_handler\n", ibm->name); 9815 BUG_ON(!ibm->acpi); 9816 acpi_remove_notify_handler(*ibm->acpi->handle, 9817 ibm->acpi->type, 9818 dispatch_acpi_notify); 9819 ibm->flags.acpi_notify_installed = 0; 9820 } 9821 9822 if (ibm->flags.proc_created) { 9823 dbg_printk(TPACPI_DBG_EXIT, 9824 "%s: remove_proc_entry\n", ibm->name); 9825 remove_proc_entry(ibm->name, proc_dir); 9826 ibm->flags.proc_created = 0; 9827 } 9828 9829 if (ibm->flags.acpi_driver_registered) { 9830 dbg_printk(TPACPI_DBG_EXIT, 9831 "%s: acpi_bus_unregister_driver\n", ibm->name); 9832 BUG_ON(!ibm->acpi); 9833 acpi_bus_unregister_driver(ibm->acpi->driver); 9834 kfree(ibm->acpi->driver); 9835 ibm->acpi->driver = NULL; 9836 ibm->flags.acpi_driver_registered = 0; 9837 } 9838 9839 if (ibm->flags.init_called && ibm->exit) { 9840 ibm->exit(); 9841 ibm->flags.init_called = 0; 9842 } 9843 9844 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9845 } 9846 9847 static int __init ibm_init(struct ibm_init_struct *iibm) 9848 { 9849 int ret; 9850 struct ibm_struct *ibm = iibm->data; 9851 struct proc_dir_entry *entry; 9852 9853 BUG_ON(ibm == NULL); 9854 9855 INIT_LIST_HEAD(&ibm->all_drivers); 9856 9857 if (ibm->flags.experimental && !experimental) 9858 return 0; 9859 9860 dbg_printk(TPACPI_DBG_INIT, 9861 "probing for %s\n", ibm->name); 9862 9863 if (iibm->init) { 9864 ret = iibm->init(iibm); 9865 if (ret > 0) 9866 return 0; /* probe failed */ 9867 if (ret) 9868 return ret; 9869 9870 ibm->flags.init_called = 1; 9871 } 9872 9873 if (ibm->acpi) { 9874 if (ibm->acpi->hid) { 9875 ret = register_tpacpi_subdriver(ibm); 9876 if (ret) 9877 goto err_out; 9878 } 9879 9880 if (ibm->acpi->notify) { 9881 ret = setup_acpi_notify(ibm); 9882 if (ret == -ENODEV) { 9883 pr_notice("disabling subdriver %s\n", 9884 ibm->name); 9885 ret = 0; 9886 goto err_out; 9887 } 9888 if (ret < 0) 9889 goto err_out; 9890 } 9891 } 9892 9893 dbg_printk(TPACPI_DBG_INIT, 9894 "%s installed\n", ibm->name); 9895 9896 if (ibm->read) { 9897 umode_t mode = iibm->base_procfs_mode; 9898 9899 if (!mode) 9900 mode = S_IRUGO; 9901 if (ibm->write) 9902 mode |= S_IWUSR; 9903 entry = proc_create_data(ibm->name, mode, proc_dir, 9904 &dispatch_proc_fops, ibm); 9905 if (!entry) { 9906 pr_err("unable to create proc entry %s\n", ibm->name); 9907 ret = -ENODEV; 9908 goto err_out; 9909 } 9910 ibm->flags.proc_created = 1; 9911 } 9912 9913 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9914 9915 return 0; 9916 9917 err_out: 9918 dbg_printk(TPACPI_DBG_INIT, 9919 "%s: at error exit path with result %d\n", 9920 ibm->name, ret); 9921 9922 ibm_exit(ibm); 9923 return (ret < 0) ? ret : 0; 9924 } 9925 9926 /* Probing */ 9927 9928 static char __init tpacpi_parse_fw_id(const char * const s, 9929 u32 *model, u16 *release) 9930 { 9931 int i; 9932 9933 if (!s || strlen(s) < 8) 9934 goto invalid; 9935 9936 for (i = 0; i < 8; i++) 9937 if (!((s[i] >= '0' && s[i] <= '9') || 9938 (s[i] >= 'A' && s[i] <= 'Z'))) 9939 goto invalid; 9940 9941 /* 9942 * Most models: xxyTkkWW (#.##c) 9943 * Ancient 570/600 and -SL lacks (#.##c) 9944 */ 9945 if (s[3] == 'T' || s[3] == 'N') { 9946 *model = TPID(s[0], s[1]); 9947 *release = TPVER(s[4], s[5]); 9948 return s[2]; 9949 9950 /* New models: xxxyTkkW (#.##c); T550 and some others */ 9951 } else if (s[4] == 'T' || s[4] == 'N') { 9952 *model = TPID3(s[0], s[1], s[2]); 9953 *release = TPVER(s[5], s[6]); 9954 return s[3]; 9955 } 9956 9957 invalid: 9958 return '\0'; 9959 } 9960 9961 static void find_new_ec_fwstr(const struct dmi_header *dm, void *private) 9962 { 9963 char *ec_fw_string = (char *) private; 9964 const char *dmi_data = (const char *)dm; 9965 /* 9966 * ThinkPad Embedded Controller Program Table on newer models 9967 * 9968 * Offset | Name | Width | Description 9969 * ---------------------------------------------------- 9970 * 0x00 | Type | BYTE | 0x8C 9971 * 0x01 | Length | BYTE | 9972 * 0x02 | Handle | WORD | Varies 9973 * 0x04 | Signature | BYTEx6 | ASCII for "LENOVO" 9974 * 0x0A | OEM struct offset | BYTE | 0x0B 9975 * 0x0B | OEM struct number | BYTE | 0x07, for this structure 9976 * 0x0C | OEM struct revision | BYTE | 0x01, for this format 9977 * 0x0D | ECP version ID | STR ID | 9978 * 0x0E | ECP release date | STR ID | 9979 */ 9980 9981 /* Return if data structure not match */ 9982 if (dm->type != 140 || dm->length < 0x0F || 9983 memcmp(dmi_data + 4, "LENOVO", 6) != 0 || 9984 dmi_data[0x0A] != 0x0B || dmi_data[0x0B] != 0x07 || 9985 dmi_data[0x0C] != 0x01) 9986 return; 9987 9988 /* fwstr is the first 8byte string */ 9989 strncpy(ec_fw_string, dmi_data + 0x0F, 8); 9990 } 9991 9992 /* returns 0 - probe ok, or < 0 - probe error. 9993 * Probe ok doesn't mean thinkpad found. 9994 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 9995 static int __must_check __init get_thinkpad_model_data( 9996 struct thinkpad_id_data *tp) 9997 { 9998 const struct dmi_device *dev = NULL; 9999 char ec_fw_string[18] = {0}; 10000 char const *s; 10001 char t; 10002 10003 if (!tp) 10004 return -EINVAL; 10005 10006 memset(tp, 0, sizeof(*tp)); 10007 10008 if (dmi_name_in_vendors("IBM")) 10009 tp->vendor = PCI_VENDOR_ID_IBM; 10010 else if (dmi_name_in_vendors("LENOVO")) 10011 tp->vendor = PCI_VENDOR_ID_LENOVO; 10012 else 10013 return 0; 10014 10015 s = dmi_get_system_info(DMI_BIOS_VERSION); 10016 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 10017 if (s && !tp->bios_version_str) 10018 return -ENOMEM; 10019 10020 /* Really ancient ThinkPad 240X will fail this, which is fine */ 10021 t = tpacpi_parse_fw_id(tp->bios_version_str, 10022 &tp->bios_model, &tp->bios_release); 10023 if (t != 'E' && t != 'C') 10024 return 0; 10025 10026 /* 10027 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 10028 * X32 or newer, all Z series; Some models must have an 10029 * up-to-date BIOS or they will not be detected. 10030 * 10031 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10032 */ 10033 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 10034 if (sscanf(dev->name, 10035 "IBM ThinkPad Embedded Controller -[%17c", 10036 ec_fw_string) == 1) { 10037 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 10038 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 10039 break; 10040 } 10041 } 10042 10043 /* Newer ThinkPads have different EC program info table */ 10044 if (!ec_fw_string[0]) 10045 dmi_walk(find_new_ec_fwstr, &ec_fw_string); 10046 10047 if (ec_fw_string[0]) { 10048 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 10049 if (!tp->ec_version_str) 10050 return -ENOMEM; 10051 10052 t = tpacpi_parse_fw_id(ec_fw_string, 10053 &tp->ec_model, &tp->ec_release); 10054 if (t != 'H') { 10055 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n", 10056 ec_fw_string); 10057 pr_notice("please report this to %s\n", TPACPI_MAIL); 10058 } 10059 } 10060 10061 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 10062 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 10063 tp->model_str = kstrdup(s, GFP_KERNEL); 10064 if (!tp->model_str) 10065 return -ENOMEM; 10066 } else { 10067 s = dmi_get_system_info(DMI_BIOS_VENDOR); 10068 if (s && !(strncasecmp(s, "Lenovo", 6))) { 10069 tp->model_str = kstrdup(s, GFP_KERNEL); 10070 if (!tp->model_str) 10071 return -ENOMEM; 10072 } 10073 } 10074 10075 s = dmi_get_system_info(DMI_PRODUCT_NAME); 10076 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 10077 if (s && !tp->nummodel_str) 10078 return -ENOMEM; 10079 10080 return 0; 10081 } 10082 10083 static int __init probe_for_thinkpad(void) 10084 { 10085 int is_thinkpad; 10086 10087 if (acpi_disabled) 10088 return -ENODEV; 10089 10090 /* It would be dangerous to run the driver in this case */ 10091 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 10092 return -ENODEV; 10093 10094 /* 10095 * Non-ancient models have better DMI tagging, but very old models 10096 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 10097 */ 10098 is_thinkpad = (thinkpad_id.model_str != NULL) || 10099 (thinkpad_id.ec_model != 0) || 10100 tpacpi_is_fw_known(); 10101 10102 /* The EC handler is required */ 10103 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 10104 if (!ec_handle) { 10105 if (is_thinkpad) 10106 pr_err("Not yet supported ThinkPad detected!\n"); 10107 return -ENODEV; 10108 } 10109 10110 if (!is_thinkpad && !force_load) 10111 return -ENODEV; 10112 10113 return 0; 10114 } 10115 10116 static void __init thinkpad_acpi_init_banner(void) 10117 { 10118 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 10119 pr_info("%s\n", TPACPI_URL); 10120 10121 pr_info("ThinkPad BIOS %s, EC %s\n", 10122 (thinkpad_id.bios_version_str) ? 10123 thinkpad_id.bios_version_str : "unknown", 10124 (thinkpad_id.ec_version_str) ? 10125 thinkpad_id.ec_version_str : "unknown"); 10126 10127 BUG_ON(!thinkpad_id.vendor); 10128 10129 if (thinkpad_id.model_str) 10130 pr_info("%s %s, model %s\n", 10131 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 10132 "IBM" : ((thinkpad_id.vendor == 10133 PCI_VENDOR_ID_LENOVO) ? 10134 "Lenovo" : "Unknown vendor"), 10135 thinkpad_id.model_str, 10136 (thinkpad_id.nummodel_str) ? 10137 thinkpad_id.nummodel_str : "unknown"); 10138 } 10139 10140 /* Module init, exit, parameters */ 10141 10142 static struct ibm_init_struct ibms_init[] __initdata = { 10143 { 10144 .data = &thinkpad_acpi_driver_data, 10145 }, 10146 { 10147 .init = hotkey_init, 10148 .data = &hotkey_driver_data, 10149 }, 10150 { 10151 .init = bluetooth_init, 10152 .data = &bluetooth_driver_data, 10153 }, 10154 { 10155 .init = wan_init, 10156 .data = &wan_driver_data, 10157 }, 10158 { 10159 .init = uwb_init, 10160 .data = &uwb_driver_data, 10161 }, 10162 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 10163 { 10164 .init = video_init, 10165 .base_procfs_mode = S_IRUSR, 10166 .data = &video_driver_data, 10167 }, 10168 #endif 10169 { 10170 .init = kbdlight_init, 10171 .data = &kbdlight_driver_data, 10172 }, 10173 { 10174 .init = light_init, 10175 .data = &light_driver_data, 10176 }, 10177 { 10178 .init = cmos_init, 10179 .data = &cmos_driver_data, 10180 }, 10181 { 10182 .init = led_init, 10183 .data = &led_driver_data, 10184 }, 10185 { 10186 .init = beep_init, 10187 .data = &beep_driver_data, 10188 }, 10189 { 10190 .init = thermal_init, 10191 .data = &thermal_driver_data, 10192 }, 10193 { 10194 .init = brightness_init, 10195 .data = &brightness_driver_data, 10196 }, 10197 { 10198 .init = volume_init, 10199 .data = &volume_driver_data, 10200 }, 10201 { 10202 .init = fan_init, 10203 .data = &fan_driver_data, 10204 }, 10205 { 10206 .init = mute_led_init, 10207 .data = &mute_led_driver_data, 10208 }, 10209 { 10210 .init = tpacpi_battery_init, 10211 .data = &battery_driver_data, 10212 }, 10213 }; 10214 10215 static int __init set_ibm_param(const char *val, const struct kernel_param *kp) 10216 { 10217 unsigned int i; 10218 struct ibm_struct *ibm; 10219 10220 if (!kp || !kp->name || !val) 10221 return -EINVAL; 10222 10223 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10224 ibm = ibms_init[i].data; 10225 WARN_ON(ibm == NULL); 10226 10227 if (!ibm || !ibm->name) 10228 continue; 10229 10230 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 10231 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 10232 return -ENOSPC; 10233 strcpy(ibms_init[i].param, val); 10234 strcat(ibms_init[i].param, ","); 10235 return 0; 10236 } 10237 } 10238 10239 return -EINVAL; 10240 } 10241 10242 module_param(experimental, int, 0444); 10243 MODULE_PARM_DESC(experimental, 10244 "Enables experimental features when non-zero"); 10245 10246 module_param_named(debug, dbg_level, uint, 0); 10247 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 10248 10249 module_param(force_load, bool, 0444); 10250 MODULE_PARM_DESC(force_load, 10251 "Attempts to load the driver even on a mis-identified ThinkPad when true"); 10252 10253 module_param_named(fan_control, fan_control_allowed, bool, 0444); 10254 MODULE_PARM_DESC(fan_control, 10255 "Enables setting fan parameters features when true"); 10256 10257 module_param_named(brightness_mode, brightness_mode, uint, 0444); 10258 MODULE_PARM_DESC(brightness_mode, 10259 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 10260 10261 module_param(brightness_enable, uint, 0444); 10262 MODULE_PARM_DESC(brightness_enable, 10263 "Enables backlight control when 1, disables when 0"); 10264 10265 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 10266 module_param_named(volume_mode, volume_mode, uint, 0444); 10267 MODULE_PARM_DESC(volume_mode, 10268 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 10269 10270 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 10271 MODULE_PARM_DESC(volume_capabilities, 10272 "Selects the mixer capabilities: 0=auto, 1=volume and mute, 2=mute only"); 10273 10274 module_param_named(volume_control, volume_control_allowed, bool, 0444); 10275 MODULE_PARM_DESC(volume_control, 10276 "Enables software override for the console audio control when true"); 10277 10278 module_param_named(software_mute, software_mute_requested, bool, 0444); 10279 MODULE_PARM_DESC(software_mute, 10280 "Request full software mute control"); 10281 10282 /* ALSA module API parameters */ 10283 module_param_named(index, alsa_index, int, 0444); 10284 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 10285 module_param_named(id, alsa_id, charp, 0444); 10286 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 10287 module_param_named(enable, alsa_enable, bool, 0444); 10288 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 10289 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 10290 10291 /* The module parameter can't be read back, that's why 0 is used here */ 10292 #define TPACPI_PARAM(feature) \ 10293 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 10294 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation") 10295 10296 TPACPI_PARAM(hotkey); 10297 TPACPI_PARAM(bluetooth); 10298 TPACPI_PARAM(video); 10299 TPACPI_PARAM(light); 10300 TPACPI_PARAM(cmos); 10301 TPACPI_PARAM(led); 10302 TPACPI_PARAM(beep); 10303 TPACPI_PARAM(brightness); 10304 TPACPI_PARAM(volume); 10305 TPACPI_PARAM(fan); 10306 10307 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10308 module_param(dbg_wlswemul, uint, 0444); 10309 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 10310 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 10311 MODULE_PARM_DESC(wlsw_state, 10312 "Initial state of the emulated WLSW switch"); 10313 10314 module_param(dbg_bluetoothemul, uint, 0444); 10315 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 10316 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 10317 MODULE_PARM_DESC(bluetooth_state, 10318 "Initial state of the emulated bluetooth switch"); 10319 10320 module_param(dbg_wwanemul, uint, 0444); 10321 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 10322 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 10323 MODULE_PARM_DESC(wwan_state, 10324 "Initial state of the emulated WWAN switch"); 10325 10326 module_param(dbg_uwbemul, uint, 0444); 10327 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 10328 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 10329 MODULE_PARM_DESC(uwb_state, 10330 "Initial state of the emulated UWB switch"); 10331 #endif 10332 10333 static void thinkpad_acpi_module_exit(void) 10334 { 10335 struct ibm_struct *ibm, *itmp; 10336 10337 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 10338 10339 list_for_each_entry_safe_reverse(ibm, itmp, 10340 &tpacpi_all_drivers, 10341 all_drivers) { 10342 ibm_exit(ibm); 10343 } 10344 10345 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 10346 10347 if (tpacpi_inputdev) { 10348 if (tp_features.input_device_registered) 10349 input_unregister_device(tpacpi_inputdev); 10350 else 10351 input_free_device(tpacpi_inputdev); 10352 kfree(hotkey_keycode_map); 10353 } 10354 10355 if (tpacpi_hwmon) 10356 hwmon_device_unregister(tpacpi_hwmon); 10357 10358 if (tpacpi_sensors_pdev) 10359 platform_device_unregister(tpacpi_sensors_pdev); 10360 if (tpacpi_pdev) 10361 platform_device_unregister(tpacpi_pdev); 10362 10363 if (tp_features.sensors_pdrv_attrs_registered) 10364 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 10365 if (tp_features.platform_drv_attrs_registered) 10366 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 10367 10368 if (tp_features.sensors_pdrv_registered) 10369 platform_driver_unregister(&tpacpi_hwmon_pdriver); 10370 10371 if (tp_features.platform_drv_registered) 10372 platform_driver_unregister(&tpacpi_pdriver); 10373 10374 if (proc_dir) 10375 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 10376 10377 if (tpacpi_wq) 10378 destroy_workqueue(tpacpi_wq); 10379 10380 kfree(thinkpad_id.bios_version_str); 10381 kfree(thinkpad_id.ec_version_str); 10382 kfree(thinkpad_id.model_str); 10383 kfree(thinkpad_id.nummodel_str); 10384 } 10385 10386 10387 static int __init thinkpad_acpi_module_init(void) 10388 { 10389 int ret, i; 10390 10391 tpacpi_lifecycle = TPACPI_LIFE_INIT; 10392 10393 /* Driver-level probe */ 10394 10395 ret = get_thinkpad_model_data(&thinkpad_id); 10396 if (ret) { 10397 pr_err("unable to get DMI data: %d\n", ret); 10398 thinkpad_acpi_module_exit(); 10399 return ret; 10400 } 10401 ret = probe_for_thinkpad(); 10402 if (ret) { 10403 thinkpad_acpi_module_exit(); 10404 return ret; 10405 } 10406 10407 /* Driver initialization */ 10408 10409 thinkpad_acpi_init_banner(); 10410 tpacpi_check_outdated_fw(); 10411 10412 TPACPI_ACPIHANDLE_INIT(ecrd); 10413 TPACPI_ACPIHANDLE_INIT(ecwr); 10414 10415 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 10416 if (!tpacpi_wq) { 10417 thinkpad_acpi_module_exit(); 10418 return -ENOMEM; 10419 } 10420 10421 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 10422 if (!proc_dir) { 10423 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 10424 thinkpad_acpi_module_exit(); 10425 return -ENODEV; 10426 } 10427 10428 ret = platform_driver_register(&tpacpi_pdriver); 10429 if (ret) { 10430 pr_err("unable to register main platform driver\n"); 10431 thinkpad_acpi_module_exit(); 10432 return ret; 10433 } 10434 tp_features.platform_drv_registered = 1; 10435 10436 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 10437 if (ret) { 10438 pr_err("unable to register hwmon platform driver\n"); 10439 thinkpad_acpi_module_exit(); 10440 return ret; 10441 } 10442 tp_features.sensors_pdrv_registered = 1; 10443 10444 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 10445 if (!ret) { 10446 tp_features.platform_drv_attrs_registered = 1; 10447 ret = tpacpi_create_driver_attributes( 10448 &tpacpi_hwmon_pdriver.driver); 10449 } 10450 if (ret) { 10451 pr_err("unable to create sysfs driver attributes\n"); 10452 thinkpad_acpi_module_exit(); 10453 return ret; 10454 } 10455 tp_features.sensors_pdrv_attrs_registered = 1; 10456 10457 10458 /* Device initialization */ 10459 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 10460 NULL, 0); 10461 if (IS_ERR(tpacpi_pdev)) { 10462 ret = PTR_ERR(tpacpi_pdev); 10463 tpacpi_pdev = NULL; 10464 pr_err("unable to register platform device\n"); 10465 thinkpad_acpi_module_exit(); 10466 return ret; 10467 } 10468 tpacpi_sensors_pdev = platform_device_register_simple( 10469 TPACPI_HWMON_DRVR_NAME, 10470 -1, NULL, 0); 10471 if (IS_ERR(tpacpi_sensors_pdev)) { 10472 ret = PTR_ERR(tpacpi_sensors_pdev); 10473 tpacpi_sensors_pdev = NULL; 10474 pr_err("unable to register hwmon platform device\n"); 10475 thinkpad_acpi_module_exit(); 10476 return ret; 10477 } 10478 tp_features.sensors_pdev_attrs_registered = 1; 10479 tpacpi_hwmon = hwmon_device_register_with_groups( 10480 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL); 10481 10482 if (IS_ERR(tpacpi_hwmon)) { 10483 ret = PTR_ERR(tpacpi_hwmon); 10484 tpacpi_hwmon = NULL; 10485 pr_err("unable to register hwmon device\n"); 10486 thinkpad_acpi_module_exit(); 10487 return ret; 10488 } 10489 mutex_init(&tpacpi_inputdev_send_mutex); 10490 tpacpi_inputdev = input_allocate_device(); 10491 if (!tpacpi_inputdev) { 10492 thinkpad_acpi_module_exit(); 10493 return -ENOMEM; 10494 } else { 10495 /* Prepare input device, but don't register */ 10496 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 10497 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 10498 tpacpi_inputdev->id.bustype = BUS_HOST; 10499 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 10500 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 10501 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 10502 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 10503 } 10504 10505 /* Init subdriver dependencies */ 10506 tpacpi_detect_brightness_capabilities(); 10507 10508 /* Init subdrivers */ 10509 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10510 ret = ibm_init(&ibms_init[i]); 10511 if (ret >= 0 && *ibms_init[i].param) 10512 ret = ibms_init[i].data->write(ibms_init[i].param); 10513 if (ret < 0) { 10514 thinkpad_acpi_module_exit(); 10515 return ret; 10516 } 10517 } 10518 10519 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 10520 10521 ret = input_register_device(tpacpi_inputdev); 10522 if (ret < 0) { 10523 pr_err("unable to register input device\n"); 10524 thinkpad_acpi_module_exit(); 10525 return ret; 10526 } else { 10527 tp_features.input_device_registered = 1; 10528 } 10529 10530 return 0; 10531 } 10532 10533 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 10534 10535 /* 10536 * This will autoload the driver in almost every ThinkPad 10537 * in widespread use. 10538 * 10539 * Only _VERY_ old models, like the 240, 240x and 570 lack 10540 * the HKEY event interface. 10541 */ 10542 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 10543 10544 /* 10545 * DMI matching for module autoloading 10546 * 10547 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10548 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 10549 * 10550 * Only models listed in thinkwiki will be supported, so add yours 10551 * if it is not there yet. 10552 */ 10553 #define IBM_BIOS_MODULE_ALIAS(__type) \ 10554 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 10555 10556 /* Ancient thinkpad BIOSes have to be identified by 10557 * BIOS type or model number, and there are far less 10558 * BIOS types than model numbers... */ 10559 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 10560 10561 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 10562 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 10563 MODULE_DESCRIPTION(TPACPI_DESC); 10564 MODULE_VERSION(TPACPI_VERSION); 10565 MODULE_LICENSE("GPL"); 10566 10567 module_init(thinkpad_acpi_module_init); 10568 module_exit(thinkpad_acpi_module_exit); 10569