1 /* 2 * thinkpad_acpi.c - ThinkPad ACPI Extras 3 * 4 * 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net> 6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt 25 26 #define TPACPI_VERSION "0.26" 27 #define TPACPI_SYSFS_VERSION 0x030000 28 29 /* 30 * Changelog: 31 * 2007-10-20 changelog trimmed down 32 * 33 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 34 * drivers/misc. 35 * 36 * 2006-11-22 0.13 new maintainer 37 * changelog now lives in git commit history, and will 38 * not be updated further in-file. 39 * 40 * 2005-03-17 0.11 support for 600e, 770x 41 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 42 * 43 * 2005-01-16 0.9 use MODULE_VERSION 44 * thanks to Henrik Brix Andersen <brix@gentoo.org> 45 * fix parameter passing on module loading 46 * thanks to Rusty Russell <rusty@rustcorp.com.au> 47 * thanks to Jim Radford <radford@blackbean.org> 48 * 2004-11-08 0.8 fix init error case, don't return from a macro 49 * thanks to Chris Wright <chrisw@osdl.org> 50 */ 51 52 #include <linux/kernel.h> 53 #include <linux/module.h> 54 #include <linux/init.h> 55 #include <linux/types.h> 56 #include <linux/string.h> 57 #include <linux/list.h> 58 #include <linux/mutex.h> 59 #include <linux/sched.h> 60 #include <linux/sched/signal.h> 61 #include <linux/kthread.h> 62 #include <linux/freezer.h> 63 #include <linux/delay.h> 64 #include <linux/slab.h> 65 #include <linux/nvram.h> 66 #include <linux/proc_fs.h> 67 #include <linux/seq_file.h> 68 #include <linux/sysfs.h> 69 #include <linux/backlight.h> 70 #include <linux/bitops.h> 71 #include <linux/fb.h> 72 #include <linux/platform_device.h> 73 #include <linux/hwmon.h> 74 #include <linux/hwmon-sysfs.h> 75 #include <linux/input.h> 76 #include <linux/leds.h> 77 #include <linux/rfkill.h> 78 #include <linux/dmi.h> 79 #include <linux/jiffies.h> 80 #include <linux/workqueue.h> 81 #include <linux/acpi.h> 82 #include <linux/pci_ids.h> 83 #include <linux/power_supply.h> 84 #include <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 int __init bluetooth_init(struct ibm_init_struct *iibm) 4505 { 4506 int res; 4507 int status = 0; 4508 4509 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4510 "initializing bluetooth subdriver\n"); 4511 4512 TPACPI_ACPIHANDLE_INIT(hkey); 4513 4514 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4515 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4516 tp_features.bluetooth = hkey_handle && 4517 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4518 4519 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4520 "bluetooth is %s, status 0x%02x\n", 4521 str_supported(tp_features.bluetooth), 4522 status); 4523 4524 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4525 if (dbg_bluetoothemul) { 4526 tp_features.bluetooth = 1; 4527 pr_info("bluetooth switch emulation enabled\n"); 4528 } else 4529 #endif 4530 if (tp_features.bluetooth && 4531 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4532 /* no bluetooth hardware present in system */ 4533 tp_features.bluetooth = 0; 4534 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4535 "bluetooth hardware not installed\n"); 4536 } 4537 4538 if (!tp_features.bluetooth) 4539 return 1; 4540 4541 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4542 &bluetooth_tprfk_ops, 4543 RFKILL_TYPE_BLUETOOTH, 4544 TPACPI_RFK_BLUETOOTH_SW_NAME, 4545 true); 4546 if (res) 4547 return res; 4548 4549 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4550 &bluetooth_attr_group); 4551 if (res) { 4552 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4553 return res; 4554 } 4555 4556 return 0; 4557 } 4558 4559 /* procfs -------------------------------------------------------------- */ 4560 static int bluetooth_read(struct seq_file *m) 4561 { 4562 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4563 } 4564 4565 static int bluetooth_write(char *buf) 4566 { 4567 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4568 } 4569 4570 static struct ibm_struct bluetooth_driver_data = { 4571 .name = "bluetooth", 4572 .read = bluetooth_read, 4573 .write = bluetooth_write, 4574 .exit = bluetooth_exit, 4575 .shutdown = bluetooth_shutdown, 4576 }; 4577 4578 /************************************************************************* 4579 * Wan subdriver 4580 */ 4581 4582 enum { 4583 /* ACPI GWAN/SWAN bits */ 4584 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4585 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4586 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4587 0 = disable, 1 = enable */ 4588 }; 4589 4590 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4591 4592 static int wan_get_status(void) 4593 { 4594 int status; 4595 4596 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4597 if (dbg_wwanemul) 4598 return (tpacpi_wwan_emulstate) ? 4599 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4600 #endif 4601 4602 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4603 return -EIO; 4604 4605 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4606 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4607 } 4608 4609 static int wan_set_status(enum tpacpi_rfkill_state state) 4610 { 4611 int status; 4612 4613 vdbg_printk(TPACPI_DBG_RFKILL, 4614 "will attempt to %s wwan\n", 4615 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4616 4617 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4618 if (dbg_wwanemul) { 4619 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4620 return 0; 4621 } 4622 #endif 4623 4624 if (state == TPACPI_RFK_RADIO_ON) 4625 status = TP_ACPI_WANCARD_RADIOSSW 4626 | TP_ACPI_WANCARD_RESUMECTRL; 4627 else 4628 status = 0; 4629 4630 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4631 return -EIO; 4632 4633 return 0; 4634 } 4635 4636 /* sysfs wan enable ---------------------------------------------------- */ 4637 static ssize_t wan_enable_show(struct device *dev, 4638 struct device_attribute *attr, 4639 char *buf) 4640 { 4641 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4642 attr, buf); 4643 } 4644 4645 static ssize_t wan_enable_store(struct device *dev, 4646 struct device_attribute *attr, 4647 const char *buf, size_t count) 4648 { 4649 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4650 attr, buf, count); 4651 } 4652 4653 static DEVICE_ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4654 wan_enable_show, wan_enable_store); 4655 4656 /* --------------------------------------------------------------------- */ 4657 4658 static struct attribute *wan_attributes[] = { 4659 &dev_attr_wwan_enable.attr, 4660 NULL 4661 }; 4662 4663 static const struct attribute_group wan_attr_group = { 4664 .attrs = wan_attributes, 4665 }; 4666 4667 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4668 .get_status = wan_get_status, 4669 .set_status = wan_set_status, 4670 }; 4671 4672 static void wan_shutdown(void) 4673 { 4674 /* Order firmware to save current state to NVRAM */ 4675 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4676 TP_ACPI_WGSV_SAVE_STATE)) 4677 pr_notice("failed to save WWAN state to NVRAM\n"); 4678 else 4679 vdbg_printk(TPACPI_DBG_RFKILL, 4680 "WWAN state saved to NVRAM\n"); 4681 } 4682 4683 static void wan_exit(void) 4684 { 4685 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4686 &wan_attr_group); 4687 4688 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4689 4690 wan_shutdown(); 4691 } 4692 4693 static int __init wan_init(struct ibm_init_struct *iibm) 4694 { 4695 int res; 4696 int status = 0; 4697 4698 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4699 "initializing wan subdriver\n"); 4700 4701 TPACPI_ACPIHANDLE_INIT(hkey); 4702 4703 tp_features.wan = hkey_handle && 4704 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4705 4706 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4707 "wan is %s, status 0x%02x\n", 4708 str_supported(tp_features.wan), 4709 status); 4710 4711 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4712 if (dbg_wwanemul) { 4713 tp_features.wan = 1; 4714 pr_info("wwan switch emulation enabled\n"); 4715 } else 4716 #endif 4717 if (tp_features.wan && 4718 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4719 /* no wan hardware present in system */ 4720 tp_features.wan = 0; 4721 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4722 "wan hardware not installed\n"); 4723 } 4724 4725 if (!tp_features.wan) 4726 return 1; 4727 4728 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4729 &wan_tprfk_ops, 4730 RFKILL_TYPE_WWAN, 4731 TPACPI_RFK_WWAN_SW_NAME, 4732 true); 4733 if (res) 4734 return res; 4735 4736 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4737 &wan_attr_group); 4738 4739 if (res) { 4740 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4741 return res; 4742 } 4743 4744 return 0; 4745 } 4746 4747 /* procfs -------------------------------------------------------------- */ 4748 static int wan_read(struct seq_file *m) 4749 { 4750 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4751 } 4752 4753 static int wan_write(char *buf) 4754 { 4755 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4756 } 4757 4758 static struct ibm_struct wan_driver_data = { 4759 .name = "wan", 4760 .read = wan_read, 4761 .write = wan_write, 4762 .exit = wan_exit, 4763 .shutdown = wan_shutdown, 4764 }; 4765 4766 /************************************************************************* 4767 * UWB subdriver 4768 */ 4769 4770 enum { 4771 /* ACPI GUWB/SUWB bits */ 4772 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4773 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4774 }; 4775 4776 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4777 4778 static int uwb_get_status(void) 4779 { 4780 int status; 4781 4782 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4783 if (dbg_uwbemul) 4784 return (tpacpi_uwb_emulstate) ? 4785 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4786 #endif 4787 4788 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4789 return -EIO; 4790 4791 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4792 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4793 } 4794 4795 static int uwb_set_status(enum tpacpi_rfkill_state state) 4796 { 4797 int status; 4798 4799 vdbg_printk(TPACPI_DBG_RFKILL, 4800 "will attempt to %s UWB\n", 4801 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4802 4803 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4804 if (dbg_uwbemul) { 4805 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4806 return 0; 4807 } 4808 #endif 4809 4810 if (state == TPACPI_RFK_RADIO_ON) 4811 status = TP_ACPI_UWB_RADIOSSW; 4812 else 4813 status = 0; 4814 4815 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4816 return -EIO; 4817 4818 return 0; 4819 } 4820 4821 /* --------------------------------------------------------------------- */ 4822 4823 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4824 .get_status = uwb_get_status, 4825 .set_status = uwb_set_status, 4826 }; 4827 4828 static void uwb_exit(void) 4829 { 4830 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4831 } 4832 4833 static int __init uwb_init(struct ibm_init_struct *iibm) 4834 { 4835 int res; 4836 int status = 0; 4837 4838 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4839 "initializing uwb subdriver\n"); 4840 4841 TPACPI_ACPIHANDLE_INIT(hkey); 4842 4843 tp_features.uwb = hkey_handle && 4844 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4845 4846 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4847 "uwb is %s, status 0x%02x\n", 4848 str_supported(tp_features.uwb), 4849 status); 4850 4851 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4852 if (dbg_uwbemul) { 4853 tp_features.uwb = 1; 4854 pr_info("uwb switch emulation enabled\n"); 4855 } else 4856 #endif 4857 if (tp_features.uwb && 4858 !(status & TP_ACPI_UWB_HWPRESENT)) { 4859 /* no uwb hardware present in system */ 4860 tp_features.uwb = 0; 4861 dbg_printk(TPACPI_DBG_INIT, 4862 "uwb hardware not installed\n"); 4863 } 4864 4865 if (!tp_features.uwb) 4866 return 1; 4867 4868 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4869 &uwb_tprfk_ops, 4870 RFKILL_TYPE_UWB, 4871 TPACPI_RFK_UWB_SW_NAME, 4872 false); 4873 return res; 4874 } 4875 4876 static struct ibm_struct uwb_driver_data = { 4877 .name = "uwb", 4878 .exit = uwb_exit, 4879 .flags.experimental = 1, 4880 }; 4881 4882 /************************************************************************* 4883 * Video subdriver 4884 */ 4885 4886 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4887 4888 enum video_access_mode { 4889 TPACPI_VIDEO_NONE = 0, 4890 TPACPI_VIDEO_570, /* 570 */ 4891 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4892 TPACPI_VIDEO_NEW, /* all others */ 4893 }; 4894 4895 enum { /* video status flags, based on VIDEO_570 */ 4896 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4897 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4898 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4899 }; 4900 4901 enum { /* TPACPI_VIDEO_570 constants */ 4902 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4903 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4904 * video_status_flags */ 4905 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4906 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4907 }; 4908 4909 static enum video_access_mode video_supported; 4910 static int video_orig_autosw; 4911 4912 static int video_autosw_get(void); 4913 static int video_autosw_set(int enable); 4914 4915 TPACPI_HANDLE(vid, root, 4916 "\\_SB.PCI.AGP.VGA", /* 570 */ 4917 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 4918 "\\_SB.PCI0.VID0", /* 770e */ 4919 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 4920 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 4921 "\\_SB.PCI0.AGP.VID", /* all others */ 4922 ); /* R30, R31 */ 4923 4924 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4925 4926 static int __init video_init(struct ibm_init_struct *iibm) 4927 { 4928 int ivga; 4929 4930 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4931 4932 TPACPI_ACPIHANDLE_INIT(vid); 4933 if (tpacpi_is_ibm()) 4934 TPACPI_ACPIHANDLE_INIT(vid2); 4935 4936 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4937 /* G41, assume IVGA doesn't change */ 4938 vid_handle = vid2_handle; 4939 4940 if (!vid_handle) 4941 /* video switching not supported on R30, R31 */ 4942 video_supported = TPACPI_VIDEO_NONE; 4943 else if (tpacpi_is_ibm() && 4944 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4945 /* 570 */ 4946 video_supported = TPACPI_VIDEO_570; 4947 else if (tpacpi_is_ibm() && 4948 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4949 /* 600e/x, 770e, 770x */ 4950 video_supported = TPACPI_VIDEO_770; 4951 else 4952 /* all others */ 4953 video_supported = TPACPI_VIDEO_NEW; 4954 4955 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4956 str_supported(video_supported != TPACPI_VIDEO_NONE), 4957 video_supported); 4958 4959 return (video_supported != TPACPI_VIDEO_NONE) ? 0 : 1; 4960 } 4961 4962 static void video_exit(void) 4963 { 4964 dbg_printk(TPACPI_DBG_EXIT, 4965 "restoring original video autoswitch mode\n"); 4966 if (video_autosw_set(video_orig_autosw)) 4967 pr_err("error while trying to restore original video autoswitch mode\n"); 4968 } 4969 4970 static int video_outputsw_get(void) 4971 { 4972 int status = 0; 4973 int i; 4974 4975 switch (video_supported) { 4976 case TPACPI_VIDEO_570: 4977 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4978 TP_ACPI_VIDEO_570_PHSCMD)) 4979 return -EIO; 4980 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4981 break; 4982 case TPACPI_VIDEO_770: 4983 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4984 return -EIO; 4985 if (i) 4986 status |= TP_ACPI_VIDEO_S_LCD; 4987 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4988 return -EIO; 4989 if (i) 4990 status |= TP_ACPI_VIDEO_S_CRT; 4991 break; 4992 case TPACPI_VIDEO_NEW: 4993 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4994 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4995 return -EIO; 4996 if (i) 4997 status |= TP_ACPI_VIDEO_S_CRT; 4998 4999 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 5000 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 5001 return -EIO; 5002 if (i) 5003 status |= TP_ACPI_VIDEO_S_LCD; 5004 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 5005 return -EIO; 5006 if (i) 5007 status |= TP_ACPI_VIDEO_S_DVI; 5008 break; 5009 default: 5010 return -ENOSYS; 5011 } 5012 5013 return status; 5014 } 5015 5016 static int video_outputsw_set(int status) 5017 { 5018 int autosw; 5019 int res = 0; 5020 5021 switch (video_supported) { 5022 case TPACPI_VIDEO_570: 5023 res = acpi_evalf(NULL, NULL, 5024 "\\_SB.PHS2", "vdd", 5025 TP_ACPI_VIDEO_570_PHS2CMD, 5026 status | TP_ACPI_VIDEO_570_PHS2SET); 5027 break; 5028 case TPACPI_VIDEO_770: 5029 autosw = video_autosw_get(); 5030 if (autosw < 0) 5031 return autosw; 5032 5033 res = video_autosw_set(1); 5034 if (res) 5035 return res; 5036 res = acpi_evalf(vid_handle, NULL, 5037 "ASWT", "vdd", status * 0x100, 0); 5038 if (!autosw && video_autosw_set(autosw)) { 5039 pr_err("video auto-switch left enabled due to error\n"); 5040 return -EIO; 5041 } 5042 break; 5043 case TPACPI_VIDEO_NEW: 5044 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 5045 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 5046 break; 5047 default: 5048 return -ENOSYS; 5049 } 5050 5051 return (res) ? 0 : -EIO; 5052 } 5053 5054 static int video_autosw_get(void) 5055 { 5056 int autosw = 0; 5057 5058 switch (video_supported) { 5059 case TPACPI_VIDEO_570: 5060 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 5061 return -EIO; 5062 break; 5063 case TPACPI_VIDEO_770: 5064 case TPACPI_VIDEO_NEW: 5065 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 5066 return -EIO; 5067 break; 5068 default: 5069 return -ENOSYS; 5070 } 5071 5072 return autosw & 1; 5073 } 5074 5075 static int video_autosw_set(int enable) 5076 { 5077 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable) ? 1 : 0)) 5078 return -EIO; 5079 return 0; 5080 } 5081 5082 static int video_outputsw_cycle(void) 5083 { 5084 int autosw = video_autosw_get(); 5085 int res; 5086 5087 if (autosw < 0) 5088 return autosw; 5089 5090 switch (video_supported) { 5091 case TPACPI_VIDEO_570: 5092 res = video_autosw_set(1); 5093 if (res) 5094 return res; 5095 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 5096 break; 5097 case TPACPI_VIDEO_770: 5098 case TPACPI_VIDEO_NEW: 5099 res = video_autosw_set(1); 5100 if (res) 5101 return res; 5102 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 5103 break; 5104 default: 5105 return -ENOSYS; 5106 } 5107 if (!autosw && video_autosw_set(autosw)) { 5108 pr_err("video auto-switch left enabled due to error\n"); 5109 return -EIO; 5110 } 5111 5112 return (res) ? 0 : -EIO; 5113 } 5114 5115 static int video_expand_toggle(void) 5116 { 5117 switch (video_supported) { 5118 case TPACPI_VIDEO_570: 5119 return acpi_evalf(ec_handle, NULL, "_Q17", "v") ? 5120 0 : -EIO; 5121 case TPACPI_VIDEO_770: 5122 return acpi_evalf(vid_handle, NULL, "VEXP", "v") ? 5123 0 : -EIO; 5124 case TPACPI_VIDEO_NEW: 5125 return acpi_evalf(NULL, NULL, "\\VEXP", "v") ? 5126 0 : -EIO; 5127 default: 5128 return -ENOSYS; 5129 } 5130 /* not reached */ 5131 } 5132 5133 static int video_read(struct seq_file *m) 5134 { 5135 int status, autosw; 5136 5137 if (video_supported == TPACPI_VIDEO_NONE) { 5138 seq_printf(m, "status:\t\tnot supported\n"); 5139 return 0; 5140 } 5141 5142 /* Even reads can crash X.org, so... */ 5143 if (!capable(CAP_SYS_ADMIN)) 5144 return -EPERM; 5145 5146 status = video_outputsw_get(); 5147 if (status < 0) 5148 return status; 5149 5150 autosw = video_autosw_get(); 5151 if (autosw < 0) 5152 return autosw; 5153 5154 seq_printf(m, "status:\t\tsupported\n"); 5155 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 5156 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 5157 if (video_supported == TPACPI_VIDEO_NEW) 5158 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 5159 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 5160 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 5161 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 5162 if (video_supported == TPACPI_VIDEO_NEW) 5163 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 5164 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 5165 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 5166 5167 return 0; 5168 } 5169 5170 static int video_write(char *buf) 5171 { 5172 char *cmd; 5173 int enable, disable, status; 5174 int res; 5175 5176 if (video_supported == TPACPI_VIDEO_NONE) 5177 return -ENODEV; 5178 5179 /* Even reads can crash X.org, let alone writes... */ 5180 if (!capable(CAP_SYS_ADMIN)) 5181 return -EPERM; 5182 5183 enable = 0; 5184 disable = 0; 5185 5186 while ((cmd = next_cmd(&buf))) { 5187 if (strlencmp(cmd, "lcd_enable") == 0) { 5188 enable |= TP_ACPI_VIDEO_S_LCD; 5189 } else if (strlencmp(cmd, "lcd_disable") == 0) { 5190 disable |= TP_ACPI_VIDEO_S_LCD; 5191 } else if (strlencmp(cmd, "crt_enable") == 0) { 5192 enable |= TP_ACPI_VIDEO_S_CRT; 5193 } else if (strlencmp(cmd, "crt_disable") == 0) { 5194 disable |= TP_ACPI_VIDEO_S_CRT; 5195 } else if (video_supported == TPACPI_VIDEO_NEW && 5196 strlencmp(cmd, "dvi_enable") == 0) { 5197 enable |= TP_ACPI_VIDEO_S_DVI; 5198 } else if (video_supported == TPACPI_VIDEO_NEW && 5199 strlencmp(cmd, "dvi_disable") == 0) { 5200 disable |= TP_ACPI_VIDEO_S_DVI; 5201 } else if (strlencmp(cmd, "auto_enable") == 0) { 5202 res = video_autosw_set(1); 5203 if (res) 5204 return res; 5205 } else if (strlencmp(cmd, "auto_disable") == 0) { 5206 res = video_autosw_set(0); 5207 if (res) 5208 return res; 5209 } else if (strlencmp(cmd, "video_switch") == 0) { 5210 res = video_outputsw_cycle(); 5211 if (res) 5212 return res; 5213 } else if (strlencmp(cmd, "expand_toggle") == 0) { 5214 res = video_expand_toggle(); 5215 if (res) 5216 return res; 5217 } else 5218 return -EINVAL; 5219 } 5220 5221 if (enable || disable) { 5222 status = video_outputsw_get(); 5223 if (status < 0) 5224 return status; 5225 res = video_outputsw_set((status & ~disable) | enable); 5226 if (res) 5227 return res; 5228 } 5229 5230 return 0; 5231 } 5232 5233 static struct ibm_struct video_driver_data = { 5234 .name = "video", 5235 .read = video_read, 5236 .write = video_write, 5237 .exit = video_exit, 5238 }; 5239 5240 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 5241 5242 /************************************************************************* 5243 * Keyboard backlight subdriver 5244 */ 5245 5246 static enum led_brightness kbdlight_brightness; 5247 static DEFINE_MUTEX(kbdlight_mutex); 5248 5249 static int kbdlight_set_level(int level) 5250 { 5251 int ret = 0; 5252 5253 if (!hkey_handle) 5254 return -ENXIO; 5255 5256 mutex_lock(&kbdlight_mutex); 5257 5258 if (!acpi_evalf(hkey_handle, NULL, "MLCS", "dd", level)) 5259 ret = -EIO; 5260 else 5261 kbdlight_brightness = level; 5262 5263 mutex_unlock(&kbdlight_mutex); 5264 5265 return ret; 5266 } 5267 5268 static int kbdlight_get_level(void) 5269 { 5270 int status = 0; 5271 5272 if (!hkey_handle) 5273 return -ENXIO; 5274 5275 if (!acpi_evalf(hkey_handle, &status, "MLCG", "dd", 0)) 5276 return -EIO; 5277 5278 if (status < 0) 5279 return status; 5280 5281 return status & 0x3; 5282 } 5283 5284 static bool kbdlight_is_supported(void) 5285 { 5286 int status = 0; 5287 5288 if (!hkey_handle) 5289 return false; 5290 5291 if (!acpi_has_method(hkey_handle, "MLCG")) { 5292 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG is unavailable\n"); 5293 return false; 5294 } 5295 5296 if (!acpi_evalf(hkey_handle, &status, "MLCG", "qdd", 0)) { 5297 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG failed\n"); 5298 return false; 5299 } 5300 5301 if (status < 0) { 5302 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG err: %d\n", status); 5303 return false; 5304 } 5305 5306 vdbg_printk(TPACPI_DBG_INIT, "kbdlight MLCG returned 0x%x\n", status); 5307 /* 5308 * Guessed test for keyboard backlight: 5309 * 5310 * Machines with backlight keyboard return: 5311 * b010100000010000000XX - ThinkPad X1 Carbon 3rd 5312 * b110100010010000000XX - ThinkPad x230 5313 * b010100000010000000XX - ThinkPad x240 5314 * b010100000010000000XX - ThinkPad W541 5315 * (XX is current backlight level) 5316 * 5317 * Machines without backlight keyboard return: 5318 * b10100001000000000000 - ThinkPad x230 5319 * b10110001000000000000 - ThinkPad E430 5320 * b00000000000000000000 - ThinkPad E450 5321 * 5322 * Candidate BITs for detection test (XOR): 5323 * b01000000001000000000 5324 * ^ 5325 */ 5326 return status & BIT(9); 5327 } 5328 5329 static int kbdlight_sysfs_set(struct led_classdev *led_cdev, 5330 enum led_brightness brightness) 5331 { 5332 return kbdlight_set_level(brightness); 5333 } 5334 5335 static enum led_brightness kbdlight_sysfs_get(struct led_classdev *led_cdev) 5336 { 5337 int level; 5338 5339 level = kbdlight_get_level(); 5340 if (level < 0) 5341 return 0; 5342 5343 return level; 5344 } 5345 5346 static struct tpacpi_led_classdev tpacpi_led_kbdlight = { 5347 .led_classdev = { 5348 .name = "tpacpi::kbd_backlight", 5349 .max_brightness = 2, 5350 .flags = LED_BRIGHT_HW_CHANGED, 5351 .brightness_set_blocking = &kbdlight_sysfs_set, 5352 .brightness_get = &kbdlight_sysfs_get, 5353 } 5354 }; 5355 5356 static int __init kbdlight_init(struct ibm_init_struct *iibm) 5357 { 5358 int rc; 5359 5360 vdbg_printk(TPACPI_DBG_INIT, "initializing kbdlight subdriver\n"); 5361 5362 TPACPI_ACPIHANDLE_INIT(hkey); 5363 5364 if (!kbdlight_is_supported()) { 5365 tp_features.kbdlight = 0; 5366 vdbg_printk(TPACPI_DBG_INIT, "kbdlight is unsupported\n"); 5367 return 1; 5368 } 5369 5370 kbdlight_brightness = kbdlight_sysfs_get(NULL); 5371 tp_features.kbdlight = 1; 5372 5373 rc = led_classdev_register(&tpacpi_pdev->dev, 5374 &tpacpi_led_kbdlight.led_classdev); 5375 if (rc < 0) { 5376 tp_features.kbdlight = 0; 5377 return rc; 5378 } 5379 5380 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask | 5381 TP_ACPI_HKEY_KBD_LIGHT_MASK); 5382 return 0; 5383 } 5384 5385 static void kbdlight_exit(void) 5386 { 5387 if (tp_features.kbdlight) 5388 led_classdev_unregister(&tpacpi_led_kbdlight.led_classdev); 5389 } 5390 5391 static int kbdlight_set_level_and_update(int level) 5392 { 5393 int ret; 5394 struct led_classdev *led_cdev; 5395 5396 ret = kbdlight_set_level(level); 5397 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5398 5399 if (ret == 0 && !(led_cdev->flags & LED_SUSPENDED)) 5400 led_cdev->brightness = level; 5401 5402 return ret; 5403 } 5404 5405 static int kbdlight_read(struct seq_file *m) 5406 { 5407 int level; 5408 5409 if (!tp_features.kbdlight) { 5410 seq_printf(m, "status:\t\tnot supported\n"); 5411 } else { 5412 level = kbdlight_get_level(); 5413 if (level < 0) 5414 seq_printf(m, "status:\t\terror %d\n", level); 5415 else 5416 seq_printf(m, "status:\t\t%d\n", level); 5417 seq_printf(m, "commands:\t0, 1, 2\n"); 5418 } 5419 5420 return 0; 5421 } 5422 5423 static int kbdlight_write(char *buf) 5424 { 5425 char *cmd; 5426 int level = -1; 5427 5428 if (!tp_features.kbdlight) 5429 return -ENODEV; 5430 5431 while ((cmd = next_cmd(&buf))) { 5432 if (strlencmp(cmd, "0") == 0) 5433 level = 0; 5434 else if (strlencmp(cmd, "1") == 0) 5435 level = 1; 5436 else if (strlencmp(cmd, "2") == 0) 5437 level = 2; 5438 else 5439 return -EINVAL; 5440 } 5441 5442 if (level == -1) 5443 return -EINVAL; 5444 5445 return kbdlight_set_level_and_update(level); 5446 } 5447 5448 static void kbdlight_suspend(void) 5449 { 5450 struct led_classdev *led_cdev; 5451 5452 if (!tp_features.kbdlight) 5453 return; 5454 5455 led_cdev = &tpacpi_led_kbdlight.led_classdev; 5456 led_update_brightness(led_cdev); 5457 led_classdev_suspend(led_cdev); 5458 } 5459 5460 static void kbdlight_resume(void) 5461 { 5462 if (!tp_features.kbdlight) 5463 return; 5464 5465 led_classdev_resume(&tpacpi_led_kbdlight.led_classdev); 5466 } 5467 5468 static struct ibm_struct kbdlight_driver_data = { 5469 .name = "kbdlight", 5470 .read = kbdlight_read, 5471 .write = kbdlight_write, 5472 .suspend = kbdlight_suspend, 5473 .resume = kbdlight_resume, 5474 .exit = kbdlight_exit, 5475 }; 5476 5477 /************************************************************************* 5478 * Light (thinklight) subdriver 5479 */ 5480 5481 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 5482 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 5483 5484 static int light_get_status(void) 5485 { 5486 int status = 0; 5487 5488 if (tp_features.light_status) { 5489 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 5490 return -EIO; 5491 return (!!status); 5492 } 5493 5494 return -ENXIO; 5495 } 5496 5497 static int light_set_status(int status) 5498 { 5499 int rc; 5500 5501 if (tp_features.light) { 5502 if (cmos_handle) { 5503 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 5504 (status) ? 5505 TP_CMOS_THINKLIGHT_ON : 5506 TP_CMOS_THINKLIGHT_OFF); 5507 } else { 5508 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 5509 (status) ? 1 : 0); 5510 } 5511 return (rc) ? 0 : -EIO; 5512 } 5513 5514 return -ENXIO; 5515 } 5516 5517 static int light_sysfs_set(struct led_classdev *led_cdev, 5518 enum led_brightness brightness) 5519 { 5520 return light_set_status((brightness != LED_OFF) ? 5521 TPACPI_LED_ON : TPACPI_LED_OFF); 5522 } 5523 5524 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 5525 { 5526 return (light_get_status() == 1) ? LED_FULL : LED_OFF; 5527 } 5528 5529 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 5530 .led_classdev = { 5531 .name = "tpacpi::thinklight", 5532 .brightness_set_blocking = &light_sysfs_set, 5533 .brightness_get = &light_sysfs_get, 5534 } 5535 }; 5536 5537 static int __init light_init(struct ibm_init_struct *iibm) 5538 { 5539 int rc; 5540 5541 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 5542 5543 if (tpacpi_is_ibm()) { 5544 TPACPI_ACPIHANDLE_INIT(ledb); 5545 TPACPI_ACPIHANDLE_INIT(lght); 5546 } 5547 TPACPI_ACPIHANDLE_INIT(cmos); 5548 5549 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 5550 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 5551 5552 if (tp_features.light) 5553 /* light status not supported on 5554 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 5555 tp_features.light_status = 5556 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 5557 5558 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 5559 str_supported(tp_features.light), 5560 str_supported(tp_features.light_status)); 5561 5562 if (!tp_features.light) 5563 return 1; 5564 5565 rc = led_classdev_register(&tpacpi_pdev->dev, 5566 &tpacpi_led_thinklight.led_classdev); 5567 5568 if (rc < 0) { 5569 tp_features.light = 0; 5570 tp_features.light_status = 0; 5571 } else { 5572 rc = 0; 5573 } 5574 5575 return rc; 5576 } 5577 5578 static void light_exit(void) 5579 { 5580 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 5581 } 5582 5583 static int light_read(struct seq_file *m) 5584 { 5585 int status; 5586 5587 if (!tp_features.light) { 5588 seq_printf(m, "status:\t\tnot supported\n"); 5589 } else if (!tp_features.light_status) { 5590 seq_printf(m, "status:\t\tunknown\n"); 5591 seq_printf(m, "commands:\ton, off\n"); 5592 } else { 5593 status = light_get_status(); 5594 if (status < 0) 5595 return status; 5596 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 5597 seq_printf(m, "commands:\ton, off\n"); 5598 } 5599 5600 return 0; 5601 } 5602 5603 static int light_write(char *buf) 5604 { 5605 char *cmd; 5606 int newstatus = 0; 5607 5608 if (!tp_features.light) 5609 return -ENODEV; 5610 5611 while ((cmd = next_cmd(&buf))) { 5612 if (strlencmp(cmd, "on") == 0) { 5613 newstatus = 1; 5614 } else if (strlencmp(cmd, "off") == 0) { 5615 newstatus = 0; 5616 } else 5617 return -EINVAL; 5618 } 5619 5620 return light_set_status(newstatus); 5621 } 5622 5623 static struct ibm_struct light_driver_data = { 5624 .name = "light", 5625 .read = light_read, 5626 .write = light_write, 5627 .exit = light_exit, 5628 }; 5629 5630 /************************************************************************* 5631 * CMOS subdriver 5632 */ 5633 5634 /* sysfs cmos_command -------------------------------------------------- */ 5635 static ssize_t cmos_command_store(struct device *dev, 5636 struct device_attribute *attr, 5637 const char *buf, size_t count) 5638 { 5639 unsigned long cmos_cmd; 5640 int res; 5641 5642 if (parse_strtoul(buf, 21, &cmos_cmd)) 5643 return -EINVAL; 5644 5645 res = issue_thinkpad_cmos_command(cmos_cmd); 5646 return (res) ? res : count; 5647 } 5648 5649 static DEVICE_ATTR_WO(cmos_command); 5650 5651 /* --------------------------------------------------------------------- */ 5652 5653 static int __init cmos_init(struct ibm_init_struct *iibm) 5654 { 5655 int res; 5656 5657 vdbg_printk(TPACPI_DBG_INIT, 5658 "initializing cmos commands subdriver\n"); 5659 5660 TPACPI_ACPIHANDLE_INIT(cmos); 5661 5662 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 5663 str_supported(cmos_handle != NULL)); 5664 5665 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5666 if (res) 5667 return res; 5668 5669 return (cmos_handle) ? 0 : 1; 5670 } 5671 5672 static void cmos_exit(void) 5673 { 5674 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 5675 } 5676 5677 static int cmos_read(struct seq_file *m) 5678 { 5679 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 5680 R30, R31, T20-22, X20-21 */ 5681 if (!cmos_handle) 5682 seq_printf(m, "status:\t\tnot supported\n"); 5683 else { 5684 seq_printf(m, "status:\t\tsupported\n"); 5685 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 5686 } 5687 5688 return 0; 5689 } 5690 5691 static int cmos_write(char *buf) 5692 { 5693 char *cmd; 5694 int cmos_cmd, res; 5695 5696 while ((cmd = next_cmd(&buf))) { 5697 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5698 cmos_cmd >= 0 && cmos_cmd <= 21) { 5699 /* cmos_cmd set */ 5700 } else 5701 return -EINVAL; 5702 5703 res = issue_thinkpad_cmos_command(cmos_cmd); 5704 if (res) 5705 return res; 5706 } 5707 5708 return 0; 5709 } 5710 5711 static struct ibm_struct cmos_driver_data = { 5712 .name = "cmos", 5713 .read = cmos_read, 5714 .write = cmos_write, 5715 .exit = cmos_exit, 5716 }; 5717 5718 /************************************************************************* 5719 * LED subdriver 5720 */ 5721 5722 enum led_access_mode { 5723 TPACPI_LED_NONE = 0, 5724 TPACPI_LED_570, /* 570 */ 5725 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5726 TPACPI_LED_NEW, /* all others */ 5727 }; 5728 5729 enum { /* For TPACPI_LED_OLD */ 5730 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5731 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5732 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5733 }; 5734 5735 static enum led_access_mode led_supported; 5736 5737 static acpi_handle led_handle; 5738 5739 #define TPACPI_LED_NUMLEDS 16 5740 static struct tpacpi_led_classdev *tpacpi_leds; 5741 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5742 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5743 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5744 "tpacpi::power", 5745 "tpacpi:orange:batt", 5746 "tpacpi:green:batt", 5747 "tpacpi::dock_active", 5748 "tpacpi::bay_active", 5749 "tpacpi::dock_batt", 5750 "tpacpi::unknown_led", 5751 "tpacpi::standby", 5752 "tpacpi::dock_status1", 5753 "tpacpi::dock_status2", 5754 "tpacpi::unknown_led2", 5755 "tpacpi::unknown_led3", 5756 "tpacpi::thinkvantage", 5757 }; 5758 #define TPACPI_SAFE_LEDS 0x1081U 5759 5760 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5761 { 5762 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5763 return false; 5764 #else 5765 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5766 #endif 5767 } 5768 5769 static int led_get_status(const unsigned int led) 5770 { 5771 int status; 5772 enum led_status_t led_s; 5773 5774 switch (led_supported) { 5775 case TPACPI_LED_570: 5776 if (!acpi_evalf(ec_handle, 5777 &status, "GLED", "dd", 1 << led)) 5778 return -EIO; 5779 led_s = (status == 0) ? 5780 TPACPI_LED_OFF : 5781 ((status == 1) ? 5782 TPACPI_LED_ON : 5783 TPACPI_LED_BLINK); 5784 tpacpi_led_state_cache[led] = led_s; 5785 return led_s; 5786 default: 5787 return -ENXIO; 5788 } 5789 5790 /* not reached */ 5791 } 5792 5793 static int led_set_status(const unsigned int led, 5794 const enum led_status_t ledstatus) 5795 { 5796 /* off, on, blink. Index is led_status_t */ 5797 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5798 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5799 5800 int rc = 0; 5801 5802 switch (led_supported) { 5803 case TPACPI_LED_570: 5804 /* 570 */ 5805 if (unlikely(led > 7)) 5806 return -EINVAL; 5807 if (unlikely(tpacpi_is_led_restricted(led))) 5808 return -EPERM; 5809 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5810 (1 << led), led_sled_arg1[ledstatus])) 5811 rc = -EIO; 5812 break; 5813 case TPACPI_LED_OLD: 5814 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5815 if (unlikely(led > 7)) 5816 return -EINVAL; 5817 if (unlikely(tpacpi_is_led_restricted(led))) 5818 return -EPERM; 5819 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5820 if (rc >= 0) 5821 rc = ec_write(TPACPI_LED_EC_HLBL, 5822 (ledstatus == TPACPI_LED_BLINK) << led); 5823 if (rc >= 0) 5824 rc = ec_write(TPACPI_LED_EC_HLCL, 5825 (ledstatus != TPACPI_LED_OFF) << led); 5826 break; 5827 case TPACPI_LED_NEW: 5828 /* all others */ 5829 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5830 return -EINVAL; 5831 if (unlikely(tpacpi_is_led_restricted(led))) 5832 return -EPERM; 5833 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5834 led, led_led_arg1[ledstatus])) 5835 rc = -EIO; 5836 break; 5837 default: 5838 rc = -ENXIO; 5839 } 5840 5841 if (!rc) 5842 tpacpi_led_state_cache[led] = ledstatus; 5843 5844 return rc; 5845 } 5846 5847 static int led_sysfs_set(struct led_classdev *led_cdev, 5848 enum led_brightness brightness) 5849 { 5850 struct tpacpi_led_classdev *data = container_of(led_cdev, 5851 struct tpacpi_led_classdev, led_classdev); 5852 enum led_status_t new_state; 5853 5854 if (brightness == LED_OFF) 5855 new_state = TPACPI_LED_OFF; 5856 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5857 new_state = TPACPI_LED_ON; 5858 else 5859 new_state = TPACPI_LED_BLINK; 5860 5861 return led_set_status(data->led, new_state); 5862 } 5863 5864 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5865 unsigned long *delay_on, unsigned long *delay_off) 5866 { 5867 struct tpacpi_led_classdev *data = container_of(led_cdev, 5868 struct tpacpi_led_classdev, led_classdev); 5869 5870 /* Can we choose the flash rate? */ 5871 if (*delay_on == 0 && *delay_off == 0) { 5872 /* yes. set them to the hardware blink rate (1 Hz) */ 5873 *delay_on = 500; /* ms */ 5874 *delay_off = 500; /* ms */ 5875 } else if ((*delay_on != 500) || (*delay_off != 500)) 5876 return -EINVAL; 5877 5878 return led_set_status(data->led, TPACPI_LED_BLINK); 5879 } 5880 5881 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5882 { 5883 int rc; 5884 5885 struct tpacpi_led_classdev *data = container_of(led_cdev, 5886 struct tpacpi_led_classdev, led_classdev); 5887 5888 rc = led_get_status(data->led); 5889 5890 if (rc == TPACPI_LED_OFF || rc < 0) 5891 rc = LED_OFF; /* no error handling in led class :( */ 5892 else 5893 rc = LED_FULL; 5894 5895 return rc; 5896 } 5897 5898 static void led_exit(void) 5899 { 5900 unsigned int i; 5901 5902 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5903 if (tpacpi_leds[i].led_classdev.name) 5904 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5905 } 5906 5907 kfree(tpacpi_leds); 5908 } 5909 5910 static int __init tpacpi_init_led(unsigned int led) 5911 { 5912 int rc; 5913 5914 tpacpi_leds[led].led = led; 5915 5916 /* LEDs with no name don't get registered */ 5917 if (!tpacpi_led_names[led]) 5918 return 0; 5919 5920 tpacpi_leds[led].led_classdev.brightness_set_blocking = &led_sysfs_set; 5921 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5922 if (led_supported == TPACPI_LED_570) 5923 tpacpi_leds[led].led_classdev.brightness_get = 5924 &led_sysfs_get; 5925 5926 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5927 5928 rc = led_classdev_register(&tpacpi_pdev->dev, 5929 &tpacpi_leds[led].led_classdev); 5930 if (rc < 0) 5931 tpacpi_leds[led].led_classdev.name = NULL; 5932 5933 return rc; 5934 } 5935 5936 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5937 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5938 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5939 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5940 5941 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5942 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5943 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5944 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5945 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5946 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5947 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5948 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5949 5950 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5951 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5952 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5953 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5954 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5955 5956 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5957 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5958 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5959 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5960 5961 /* (1) - may have excess leds enabled on MSB */ 5962 5963 /* Defaults (order matters, keep last, don't reorder!) */ 5964 { /* Lenovo */ 5965 .vendor = PCI_VENDOR_ID_LENOVO, 5966 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5967 .quirks = 0x1fffU, 5968 }, 5969 { /* IBM ThinkPads with no EC version string */ 5970 .vendor = PCI_VENDOR_ID_IBM, 5971 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5972 .quirks = 0x00ffU, 5973 }, 5974 { /* IBM ThinkPads with EC version string */ 5975 .vendor = PCI_VENDOR_ID_IBM, 5976 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5977 .quirks = 0x00bfU, 5978 }, 5979 }; 5980 5981 static enum led_access_mode __init led_init_detect_mode(void) 5982 { 5983 acpi_status status; 5984 5985 if (tpacpi_is_ibm()) { 5986 /* 570 */ 5987 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5988 if (ACPI_SUCCESS(status)) 5989 return TPACPI_LED_570; 5990 5991 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5992 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5993 if (ACPI_SUCCESS(status)) 5994 return TPACPI_LED_OLD; 5995 } 5996 5997 /* most others */ 5998 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5999 if (ACPI_SUCCESS(status)) 6000 return TPACPI_LED_NEW; 6001 6002 /* R30, R31, and unknown firmwares */ 6003 led_handle = NULL; 6004 return TPACPI_LED_NONE; 6005 } 6006 6007 static int __init led_init(struct ibm_init_struct *iibm) 6008 { 6009 unsigned int i; 6010 int rc; 6011 unsigned long useful_leds; 6012 6013 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 6014 6015 led_supported = led_init_detect_mode(); 6016 6017 if (led_supported != TPACPI_LED_NONE) { 6018 useful_leds = tpacpi_check_quirks(led_useful_qtable, 6019 ARRAY_SIZE(led_useful_qtable)); 6020 6021 if (!useful_leds) { 6022 led_handle = NULL; 6023 led_supported = TPACPI_LED_NONE; 6024 } 6025 } 6026 6027 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 6028 str_supported(led_supported), led_supported); 6029 6030 if (led_supported == TPACPI_LED_NONE) 6031 return 1; 6032 6033 tpacpi_leds = kcalloc(TPACPI_LED_NUMLEDS, sizeof(*tpacpi_leds), 6034 GFP_KERNEL); 6035 if (!tpacpi_leds) { 6036 pr_err("Out of memory for LED data\n"); 6037 return -ENOMEM; 6038 } 6039 6040 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 6041 tpacpi_leds[i].led = -1; 6042 6043 if (!tpacpi_is_led_restricted(i) && 6044 test_bit(i, &useful_leds)) { 6045 rc = tpacpi_init_led(i); 6046 if (rc < 0) { 6047 led_exit(); 6048 return rc; 6049 } 6050 } 6051 } 6052 6053 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 6054 pr_notice("warning: userspace override of important firmware LEDs is enabled\n"); 6055 #endif 6056 return 0; 6057 } 6058 6059 #define str_led_status(s) \ 6060 ((s) == TPACPI_LED_OFF ? "off" : \ 6061 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 6062 6063 static int led_read(struct seq_file *m) 6064 { 6065 if (!led_supported) { 6066 seq_printf(m, "status:\t\tnot supported\n"); 6067 return 0; 6068 } 6069 seq_printf(m, "status:\t\tsupported\n"); 6070 6071 if (led_supported == TPACPI_LED_570) { 6072 /* 570 */ 6073 int i, status; 6074 for (i = 0; i < 8; i++) { 6075 status = led_get_status(i); 6076 if (status < 0) 6077 return -EIO; 6078 seq_printf(m, "%d:\t\t%s\n", 6079 i, str_led_status(status)); 6080 } 6081 } 6082 6083 seq_printf(m, "commands:\t<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 6084 6085 return 0; 6086 } 6087 6088 static int led_write(char *buf) 6089 { 6090 char *cmd; 6091 int led, rc; 6092 enum led_status_t s; 6093 6094 if (!led_supported) 6095 return -ENODEV; 6096 6097 while ((cmd = next_cmd(&buf))) { 6098 if (sscanf(cmd, "%d", &led) != 1) 6099 return -EINVAL; 6100 6101 if (led < 0 || led > (TPACPI_LED_NUMLEDS - 1) || 6102 tpacpi_leds[led].led < 0) 6103 return -ENODEV; 6104 6105 if (strstr(cmd, "off")) { 6106 s = TPACPI_LED_OFF; 6107 } else if (strstr(cmd, "on")) { 6108 s = TPACPI_LED_ON; 6109 } else if (strstr(cmd, "blink")) { 6110 s = TPACPI_LED_BLINK; 6111 } else { 6112 return -EINVAL; 6113 } 6114 6115 rc = led_set_status(led, s); 6116 if (rc < 0) 6117 return rc; 6118 } 6119 6120 return 0; 6121 } 6122 6123 static struct ibm_struct led_driver_data = { 6124 .name = "led", 6125 .read = led_read, 6126 .write = led_write, 6127 .exit = led_exit, 6128 }; 6129 6130 /************************************************************************* 6131 * Beep subdriver 6132 */ 6133 6134 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 6135 6136 #define TPACPI_BEEP_Q1 0x0001 6137 6138 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 6139 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 6140 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 6141 }; 6142 6143 static int __init beep_init(struct ibm_init_struct *iibm) 6144 { 6145 unsigned long quirks; 6146 6147 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 6148 6149 TPACPI_ACPIHANDLE_INIT(beep); 6150 6151 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 6152 str_supported(beep_handle != NULL)); 6153 6154 quirks = tpacpi_check_quirks(beep_quirk_table, 6155 ARRAY_SIZE(beep_quirk_table)); 6156 6157 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 6158 6159 return (beep_handle) ? 0 : 1; 6160 } 6161 6162 static int beep_read(struct seq_file *m) 6163 { 6164 if (!beep_handle) 6165 seq_printf(m, "status:\t\tnot supported\n"); 6166 else { 6167 seq_printf(m, "status:\t\tsupported\n"); 6168 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 6169 } 6170 6171 return 0; 6172 } 6173 6174 static int beep_write(char *buf) 6175 { 6176 char *cmd; 6177 int beep_cmd; 6178 6179 if (!beep_handle) 6180 return -ENODEV; 6181 6182 while ((cmd = next_cmd(&buf))) { 6183 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 6184 beep_cmd >= 0 && beep_cmd <= 17) { 6185 /* beep_cmd set */ 6186 } else 6187 return -EINVAL; 6188 if (tp_features.beep_needs_two_args) { 6189 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 6190 beep_cmd, 0)) 6191 return -EIO; 6192 } else { 6193 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 6194 beep_cmd)) 6195 return -EIO; 6196 } 6197 } 6198 6199 return 0; 6200 } 6201 6202 static struct ibm_struct beep_driver_data = { 6203 .name = "beep", 6204 .read = beep_read, 6205 .write = beep_write, 6206 }; 6207 6208 /************************************************************************* 6209 * Thermal subdriver 6210 */ 6211 6212 enum thermal_access_mode { 6213 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 6214 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 6215 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 6216 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 6217 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 6218 }; 6219 6220 enum { /* TPACPI_THERMAL_TPEC_* */ 6221 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 6222 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 6223 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 6224 6225 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 6226 }; 6227 6228 6229 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 6230 struct ibm_thermal_sensors_struct { 6231 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 6232 }; 6233 6234 static enum thermal_access_mode thermal_read_mode; 6235 6236 /* idx is zero-based */ 6237 static int thermal_get_sensor(int idx, s32 *value) 6238 { 6239 int t; 6240 s8 tmp; 6241 char tmpi[5]; 6242 6243 t = TP_EC_THERMAL_TMP0; 6244 6245 switch (thermal_read_mode) { 6246 #if TPACPI_MAX_THERMAL_SENSORS >= 16 6247 case TPACPI_THERMAL_TPEC_16: 6248 if (idx >= 8 && idx <= 15) { 6249 t = TP_EC_THERMAL_TMP8; 6250 idx -= 8; 6251 } 6252 /* fallthrough */ 6253 #endif 6254 case TPACPI_THERMAL_TPEC_8: 6255 if (idx <= 7) { 6256 if (!acpi_ec_read(t + idx, &tmp)) 6257 return -EIO; 6258 *value = tmp * 1000; 6259 return 0; 6260 } 6261 break; 6262 6263 case TPACPI_THERMAL_ACPI_UPDT: 6264 if (idx <= 7) { 6265 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6266 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 6267 return -EIO; 6268 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6269 return -EIO; 6270 *value = (t - 2732) * 100; 6271 return 0; 6272 } 6273 break; 6274 6275 case TPACPI_THERMAL_ACPI_TMP07: 6276 if (idx <= 7) { 6277 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 6278 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 6279 return -EIO; 6280 if (t > 127 || t < -127) 6281 t = TP_EC_THERMAL_TMP_NA; 6282 *value = t * 1000; 6283 return 0; 6284 } 6285 break; 6286 6287 case TPACPI_THERMAL_NONE: 6288 default: 6289 return -ENOSYS; 6290 } 6291 6292 return -EINVAL; 6293 } 6294 6295 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 6296 { 6297 int res, i; 6298 int n; 6299 6300 n = 8; 6301 i = 0; 6302 6303 if (!s) 6304 return -EINVAL; 6305 6306 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 6307 n = 16; 6308 6309 for (i = 0 ; i < n; i++) { 6310 res = thermal_get_sensor(i, &s->temp[i]); 6311 if (res) 6312 return res; 6313 } 6314 6315 return n; 6316 } 6317 6318 static void thermal_dump_all_sensors(void) 6319 { 6320 int n, i; 6321 struct ibm_thermal_sensors_struct t; 6322 6323 n = thermal_get_sensors(&t); 6324 if (n <= 0) 6325 return; 6326 6327 pr_notice("temperatures (Celsius):"); 6328 6329 for (i = 0; i < n; i++) { 6330 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 6331 pr_cont(" %d", (int)(t.temp[i] / 1000)); 6332 else 6333 pr_cont(" N/A"); 6334 } 6335 6336 pr_cont("\n"); 6337 } 6338 6339 /* sysfs temp##_input -------------------------------------------------- */ 6340 6341 static ssize_t thermal_temp_input_show(struct device *dev, 6342 struct device_attribute *attr, 6343 char *buf) 6344 { 6345 struct sensor_device_attribute *sensor_attr = 6346 to_sensor_dev_attr(attr); 6347 int idx = sensor_attr->index; 6348 s32 value; 6349 int res; 6350 6351 res = thermal_get_sensor(idx, &value); 6352 if (res) 6353 return res; 6354 if (value == TPACPI_THERMAL_SENSOR_NA) 6355 return -ENXIO; 6356 6357 return snprintf(buf, PAGE_SIZE, "%d\n", value); 6358 } 6359 6360 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 6361 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 6362 thermal_temp_input_show, NULL, _idxB) 6363 6364 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 6365 THERMAL_SENSOR_ATTR_TEMP(1, 0), 6366 THERMAL_SENSOR_ATTR_TEMP(2, 1), 6367 THERMAL_SENSOR_ATTR_TEMP(3, 2), 6368 THERMAL_SENSOR_ATTR_TEMP(4, 3), 6369 THERMAL_SENSOR_ATTR_TEMP(5, 4), 6370 THERMAL_SENSOR_ATTR_TEMP(6, 5), 6371 THERMAL_SENSOR_ATTR_TEMP(7, 6), 6372 THERMAL_SENSOR_ATTR_TEMP(8, 7), 6373 THERMAL_SENSOR_ATTR_TEMP(9, 8), 6374 THERMAL_SENSOR_ATTR_TEMP(10, 9), 6375 THERMAL_SENSOR_ATTR_TEMP(11, 10), 6376 THERMAL_SENSOR_ATTR_TEMP(12, 11), 6377 THERMAL_SENSOR_ATTR_TEMP(13, 12), 6378 THERMAL_SENSOR_ATTR_TEMP(14, 13), 6379 THERMAL_SENSOR_ATTR_TEMP(15, 14), 6380 THERMAL_SENSOR_ATTR_TEMP(16, 15), 6381 }; 6382 6383 #define THERMAL_ATTRS(X) \ 6384 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 6385 6386 static struct attribute *thermal_temp_input_attr[] = { 6387 THERMAL_ATTRS(8), 6388 THERMAL_ATTRS(9), 6389 THERMAL_ATTRS(10), 6390 THERMAL_ATTRS(11), 6391 THERMAL_ATTRS(12), 6392 THERMAL_ATTRS(13), 6393 THERMAL_ATTRS(14), 6394 THERMAL_ATTRS(15), 6395 THERMAL_ATTRS(0), 6396 THERMAL_ATTRS(1), 6397 THERMAL_ATTRS(2), 6398 THERMAL_ATTRS(3), 6399 THERMAL_ATTRS(4), 6400 THERMAL_ATTRS(5), 6401 THERMAL_ATTRS(6), 6402 THERMAL_ATTRS(7), 6403 NULL 6404 }; 6405 6406 static const struct attribute_group thermal_temp_input16_group = { 6407 .attrs = thermal_temp_input_attr 6408 }; 6409 6410 static const struct attribute_group thermal_temp_input8_group = { 6411 .attrs = &thermal_temp_input_attr[8] 6412 }; 6413 6414 #undef THERMAL_SENSOR_ATTR_TEMP 6415 #undef THERMAL_ATTRS 6416 6417 /* --------------------------------------------------------------------- */ 6418 6419 static int __init thermal_init(struct ibm_init_struct *iibm) 6420 { 6421 u8 t, ta1, ta2; 6422 int i; 6423 int acpi_tmp7; 6424 int res; 6425 6426 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 6427 6428 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 6429 6430 if (thinkpad_id.ec_model) { 6431 /* 6432 * Direct EC access mode: sensors at registers 6433 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 6434 * non-implemented, thermal sensors return 0x80 when 6435 * not available 6436 */ 6437 6438 ta1 = ta2 = 0; 6439 for (i = 0; i < 8; i++) { 6440 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 6441 ta1 |= t; 6442 } else { 6443 ta1 = 0; 6444 break; 6445 } 6446 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 6447 ta2 |= t; 6448 } else { 6449 ta1 = 0; 6450 break; 6451 } 6452 } 6453 if (ta1 == 0) { 6454 /* This is sheer paranoia, but we handle it anyway */ 6455 if (acpi_tmp7) { 6456 pr_err("ThinkPad ACPI EC access misbehaving, falling back to ACPI TMPx access mode\n"); 6457 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6458 } else { 6459 pr_err("ThinkPad ACPI EC access misbehaving, disabling thermal sensors access\n"); 6460 thermal_read_mode = TPACPI_THERMAL_NONE; 6461 } 6462 } else { 6463 thermal_read_mode = 6464 (ta2 != 0) ? 6465 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 6466 } 6467 } else if (acpi_tmp7) { 6468 if (tpacpi_is_ibm() && 6469 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 6470 /* 600e/x, 770e, 770x */ 6471 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 6472 } else { 6473 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 6474 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 6475 } 6476 } else { 6477 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 6478 thermal_read_mode = TPACPI_THERMAL_NONE; 6479 } 6480 6481 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 6482 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 6483 thermal_read_mode); 6484 6485 switch (thermal_read_mode) { 6486 case TPACPI_THERMAL_TPEC_16: 6487 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6488 &thermal_temp_input16_group); 6489 if (res) 6490 return res; 6491 break; 6492 case TPACPI_THERMAL_TPEC_8: 6493 case TPACPI_THERMAL_ACPI_TMP07: 6494 case TPACPI_THERMAL_ACPI_UPDT: 6495 res = sysfs_create_group(&tpacpi_hwmon->kobj, 6496 &thermal_temp_input8_group); 6497 if (res) 6498 return res; 6499 break; 6500 case TPACPI_THERMAL_NONE: 6501 default: 6502 return 1; 6503 } 6504 6505 return 0; 6506 } 6507 6508 static void thermal_exit(void) 6509 { 6510 switch (thermal_read_mode) { 6511 case TPACPI_THERMAL_TPEC_16: 6512 sysfs_remove_group(&tpacpi_hwmon->kobj, 6513 &thermal_temp_input16_group); 6514 break; 6515 case TPACPI_THERMAL_TPEC_8: 6516 case TPACPI_THERMAL_ACPI_TMP07: 6517 case TPACPI_THERMAL_ACPI_UPDT: 6518 sysfs_remove_group(&tpacpi_hwmon->kobj, 6519 &thermal_temp_input8_group); 6520 break; 6521 case TPACPI_THERMAL_NONE: 6522 default: 6523 break; 6524 } 6525 } 6526 6527 static int thermal_read(struct seq_file *m) 6528 { 6529 int n, i; 6530 struct ibm_thermal_sensors_struct t; 6531 6532 n = thermal_get_sensors(&t); 6533 if (unlikely(n < 0)) 6534 return n; 6535 6536 seq_printf(m, "temperatures:\t"); 6537 6538 if (n > 0) { 6539 for (i = 0; i < (n - 1); i++) 6540 seq_printf(m, "%d ", t.temp[i] / 1000); 6541 seq_printf(m, "%d\n", t.temp[i] / 1000); 6542 } else 6543 seq_printf(m, "not supported\n"); 6544 6545 return 0; 6546 } 6547 6548 static struct ibm_struct thermal_driver_data = { 6549 .name = "thermal", 6550 .read = thermal_read, 6551 .exit = thermal_exit, 6552 }; 6553 6554 /************************************************************************* 6555 * Backlight/brightness subdriver 6556 */ 6557 6558 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 6559 6560 /* 6561 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 6562 * CMOS NVRAM byte 0x5E, bits 0-3. 6563 * 6564 * EC HBRV (0x31) has the following layout 6565 * Bit 7: unknown function 6566 * Bit 6: unknown function 6567 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 6568 * Bit 4: must be set to zero to avoid problems 6569 * Bit 3-0: backlight brightness level 6570 * 6571 * brightness_get_raw returns status data in the HBRV layout 6572 * 6573 * WARNING: The X61 has been verified to use HBRV for something else, so 6574 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 6575 * testing on the very early *60 Lenovo models... 6576 */ 6577 6578 enum { 6579 TP_EC_BACKLIGHT = 0x31, 6580 6581 /* TP_EC_BACKLIGHT bitmasks */ 6582 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 6583 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 6584 TP_EC_BACKLIGHT_MAPSW = 0x20, 6585 }; 6586 6587 enum tpacpi_brightness_access_mode { 6588 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 6589 TPACPI_BRGHT_MODE_EC, /* EC control */ 6590 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 6591 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6592 TPACPI_BRGHT_MODE_MAX 6593 }; 6594 6595 static struct backlight_device *ibm_backlight_device; 6596 6597 static enum tpacpi_brightness_access_mode brightness_mode = 6598 TPACPI_BRGHT_MODE_MAX; 6599 6600 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 6601 6602 static struct mutex brightness_mutex; 6603 6604 /* NVRAM brightness access, 6605 * call with brightness_mutex held! */ 6606 static unsigned int tpacpi_brightness_nvram_get(void) 6607 { 6608 u8 lnvram; 6609 6610 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 6611 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6612 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 6613 lnvram &= bright_maxlvl; 6614 6615 return lnvram; 6616 } 6617 6618 static void tpacpi_brightness_checkpoint_nvram(void) 6619 { 6620 u8 lec = 0; 6621 u8 b_nvram; 6622 6623 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 6624 return; 6625 6626 vdbg_printk(TPACPI_DBG_BRGHT, 6627 "trying to checkpoint backlight level to NVRAM...\n"); 6628 6629 if (mutex_lock_killable(&brightness_mutex) < 0) 6630 return; 6631 6632 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6633 goto unlock; 6634 lec &= TP_EC_BACKLIGHT_LVLMSK; 6635 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 6636 6637 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 6638 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 6639 /* NVRAM needs update */ 6640 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 6641 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 6642 b_nvram |= lec; 6643 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 6644 dbg_printk(TPACPI_DBG_BRGHT, 6645 "updated NVRAM backlight level to %u (0x%02x)\n", 6646 (unsigned int) lec, (unsigned int) b_nvram); 6647 } else 6648 vdbg_printk(TPACPI_DBG_BRGHT, 6649 "NVRAM backlight level already is %u (0x%02x)\n", 6650 (unsigned int) lec, (unsigned int) b_nvram); 6651 6652 unlock: 6653 mutex_unlock(&brightness_mutex); 6654 } 6655 6656 6657 /* call with brightness_mutex held! */ 6658 static int tpacpi_brightness_get_raw(int *status) 6659 { 6660 u8 lec = 0; 6661 6662 switch (brightness_mode) { 6663 case TPACPI_BRGHT_MODE_UCMS_STEP: 6664 *status = tpacpi_brightness_nvram_get(); 6665 return 0; 6666 case TPACPI_BRGHT_MODE_EC: 6667 case TPACPI_BRGHT_MODE_ECNVRAM: 6668 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6669 return -EIO; 6670 *status = lec; 6671 return 0; 6672 default: 6673 return -ENXIO; 6674 } 6675 } 6676 6677 /* call with brightness_mutex held! */ 6678 /* do NOT call with illegal backlight level value */ 6679 static int tpacpi_brightness_set_ec(unsigned int value) 6680 { 6681 u8 lec = 0; 6682 6683 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6684 return -EIO; 6685 6686 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6687 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6688 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6689 return -EIO; 6690 6691 return 0; 6692 } 6693 6694 /* call with brightness_mutex held! */ 6695 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6696 { 6697 int cmos_cmd, inc; 6698 unsigned int current_value, i; 6699 6700 current_value = tpacpi_brightness_nvram_get(); 6701 6702 if (value == current_value) 6703 return 0; 6704 6705 cmos_cmd = (value > current_value) ? 6706 TP_CMOS_BRIGHTNESS_UP : 6707 TP_CMOS_BRIGHTNESS_DOWN; 6708 inc = (value > current_value) ? 1 : -1; 6709 6710 for (i = current_value; i != value; i += inc) 6711 if (issue_thinkpad_cmos_command(cmos_cmd)) 6712 return -EIO; 6713 6714 return 0; 6715 } 6716 6717 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6718 static int brightness_set(unsigned int value) 6719 { 6720 int res; 6721 6722 if (value > bright_maxlvl) 6723 return -EINVAL; 6724 6725 vdbg_printk(TPACPI_DBG_BRGHT, 6726 "set backlight level to %d\n", value); 6727 6728 res = mutex_lock_killable(&brightness_mutex); 6729 if (res < 0) 6730 return res; 6731 6732 switch (brightness_mode) { 6733 case TPACPI_BRGHT_MODE_EC: 6734 case TPACPI_BRGHT_MODE_ECNVRAM: 6735 res = tpacpi_brightness_set_ec(value); 6736 break; 6737 case TPACPI_BRGHT_MODE_UCMS_STEP: 6738 res = tpacpi_brightness_set_ucmsstep(value); 6739 break; 6740 default: 6741 res = -ENXIO; 6742 } 6743 6744 mutex_unlock(&brightness_mutex); 6745 return res; 6746 } 6747 6748 /* sysfs backlight class ----------------------------------------------- */ 6749 6750 static int brightness_update_status(struct backlight_device *bd) 6751 { 6752 unsigned int level = 6753 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6754 bd->props.power == FB_BLANK_UNBLANK) ? 6755 bd->props.brightness : 0; 6756 6757 dbg_printk(TPACPI_DBG_BRGHT, 6758 "backlight: attempt to set level to %d\n", 6759 level); 6760 6761 /* it is the backlight class's job (caller) to handle 6762 * EINTR and other errors properly */ 6763 return brightness_set(level); 6764 } 6765 6766 static int brightness_get(struct backlight_device *bd) 6767 { 6768 int status, res; 6769 6770 res = mutex_lock_killable(&brightness_mutex); 6771 if (res < 0) 6772 return 0; 6773 6774 res = tpacpi_brightness_get_raw(&status); 6775 6776 mutex_unlock(&brightness_mutex); 6777 6778 if (res < 0) 6779 return 0; 6780 6781 return status & TP_EC_BACKLIGHT_LVLMSK; 6782 } 6783 6784 static void tpacpi_brightness_notify_change(void) 6785 { 6786 backlight_force_update(ibm_backlight_device, 6787 BACKLIGHT_UPDATE_HOTKEY); 6788 } 6789 6790 static const struct backlight_ops ibm_backlight_data = { 6791 .get_brightness = brightness_get, 6792 .update_status = brightness_update_status, 6793 }; 6794 6795 /* --------------------------------------------------------------------- */ 6796 6797 /* 6798 * Call _BCL method of video device. On some ThinkPads this will 6799 * switch the firmware to the ACPI brightness control mode. 6800 */ 6801 6802 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6803 { 6804 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6805 union acpi_object *obj; 6806 struct acpi_device *device, *child; 6807 int rc; 6808 6809 if (acpi_bus_get_device(handle, &device)) 6810 return 0; 6811 6812 rc = 0; 6813 list_for_each_entry(child, &device->children, node) { 6814 acpi_status status = acpi_evaluate_object(child->handle, "_BCL", 6815 NULL, &buffer); 6816 if (ACPI_FAILURE(status)) 6817 continue; 6818 6819 obj = (union acpi_object *)buffer.pointer; 6820 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6821 pr_err("Unknown _BCL data, please report this to %s\n", 6822 TPACPI_MAIL); 6823 rc = 0; 6824 } else { 6825 rc = obj->package.count; 6826 } 6827 break; 6828 } 6829 6830 kfree(buffer.pointer); 6831 return rc; 6832 } 6833 6834 6835 /* 6836 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6837 */ 6838 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6839 { 6840 acpi_handle video_device; 6841 int bcl_levels = 0; 6842 6843 tpacpi_acpi_handle_locate("video", NULL, &video_device); 6844 if (video_device) 6845 bcl_levels = tpacpi_query_bcl_levels(video_device); 6846 6847 tp_features.bright_acpimode = (bcl_levels > 0); 6848 6849 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6850 } 6851 6852 /* 6853 * These are only useful for models that have only one possibility 6854 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6855 * these quirks. 6856 */ 6857 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6858 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6859 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6860 6861 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6862 /* Models with ATI GPUs known to require ECNVRAM mode */ 6863 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6864 6865 /* Models with ATI GPUs that can use ECNVRAM */ 6866 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6867 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6868 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6869 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6870 6871 /* Models with Intel Extreme Graphics 2 */ 6872 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6873 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6874 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6875 6876 /* Models with Intel GMA900 */ 6877 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6878 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6879 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6880 }; 6881 6882 /* 6883 * Returns < 0 for error, otherwise sets tp_features.bright_* 6884 * and bright_maxlvl. 6885 */ 6886 static void __init tpacpi_detect_brightness_capabilities(void) 6887 { 6888 unsigned int b; 6889 6890 vdbg_printk(TPACPI_DBG_INIT, 6891 "detecting firmware brightness interface capabilities\n"); 6892 6893 /* we could run a quirks check here (same table used by 6894 * brightness_init) if needed */ 6895 6896 /* 6897 * We always attempt to detect acpi support, so as to switch 6898 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6899 * going to publish a backlight interface 6900 */ 6901 b = tpacpi_check_std_acpi_brightness_support(); 6902 switch (b) { 6903 case 16: 6904 bright_maxlvl = 15; 6905 break; 6906 case 8: 6907 case 0: 6908 bright_maxlvl = 7; 6909 break; 6910 default: 6911 tp_features.bright_unkfw = 1; 6912 bright_maxlvl = b - 1; 6913 } 6914 pr_debug("detected %u brightness levels\n", bright_maxlvl + 1); 6915 } 6916 6917 static int __init brightness_init(struct ibm_init_struct *iibm) 6918 { 6919 struct backlight_properties props; 6920 int b; 6921 unsigned long quirks; 6922 6923 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6924 6925 mutex_init(&brightness_mutex); 6926 6927 quirks = tpacpi_check_quirks(brightness_quirk_table, 6928 ARRAY_SIZE(brightness_quirk_table)); 6929 6930 /* tpacpi_detect_brightness_capabilities() must have run already */ 6931 6932 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6933 if (tp_features.bright_unkfw) 6934 return 1; 6935 6936 if (!brightness_enable) { 6937 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6938 "brightness support disabled by module parameter\n"); 6939 return 1; 6940 } 6941 6942 if (acpi_video_get_backlight_type() != acpi_backlight_vendor) { 6943 if (brightness_enable > 1) { 6944 pr_info("Standard ACPI backlight interface available, not loading native one\n"); 6945 return 1; 6946 } else if (brightness_enable == 1) { 6947 pr_warn("Cannot enable backlight brightness support, ACPI is already handling it. Refer to the acpi_backlight kernel parameter.\n"); 6948 return 1; 6949 } 6950 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6951 pr_notice("Standard ACPI backlight interface not available, thinkpad_acpi native brightness control enabled\n"); 6952 } 6953 6954 /* 6955 * Check for module parameter bogosity, note that we 6956 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6957 * able to detect "unspecified" 6958 */ 6959 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6960 return -EINVAL; 6961 6962 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6963 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6964 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6965 if (quirks & TPACPI_BRGHT_Q_EC) 6966 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6967 else 6968 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6969 6970 dbg_printk(TPACPI_DBG_BRGHT, 6971 "driver auto-selected brightness_mode=%d\n", 6972 brightness_mode); 6973 } 6974 6975 /* Safety */ 6976 if (!tpacpi_is_ibm() && 6977 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6978 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6979 return -EINVAL; 6980 6981 if (tpacpi_brightness_get_raw(&b) < 0) 6982 return 1; 6983 6984 memset(&props, 0, sizeof(struct backlight_properties)); 6985 props.type = BACKLIGHT_PLATFORM; 6986 props.max_brightness = bright_maxlvl; 6987 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6988 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6989 NULL, NULL, 6990 &ibm_backlight_data, 6991 &props); 6992 if (IS_ERR(ibm_backlight_device)) { 6993 int rc = PTR_ERR(ibm_backlight_device); 6994 ibm_backlight_device = NULL; 6995 pr_err("Could not register backlight device\n"); 6996 return rc; 6997 } 6998 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6999 "brightness is supported\n"); 7000 7001 if (quirks & TPACPI_BRGHT_Q_ASK) { 7002 pr_notice("brightness: will use unverified default: brightness_mode=%d\n", 7003 brightness_mode); 7004 pr_notice("brightness: please report to %s whether it works well or not on your ThinkPad\n", 7005 TPACPI_MAIL); 7006 } 7007 7008 /* Added by mistake in early 2007. Probably useless, but it could 7009 * be working around some unknown firmware problem where the value 7010 * read at startup doesn't match the real hardware state... so leave 7011 * it in place just in case */ 7012 backlight_update_status(ibm_backlight_device); 7013 7014 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 7015 "brightness: registering brightness hotkeys as change notification\n"); 7016 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7017 | TP_ACPI_HKEY_BRGHTUP_MASK 7018 | TP_ACPI_HKEY_BRGHTDWN_MASK); 7019 return 0; 7020 } 7021 7022 static void brightness_suspend(void) 7023 { 7024 tpacpi_brightness_checkpoint_nvram(); 7025 } 7026 7027 static void brightness_shutdown(void) 7028 { 7029 tpacpi_brightness_checkpoint_nvram(); 7030 } 7031 7032 static void brightness_exit(void) 7033 { 7034 if (ibm_backlight_device) { 7035 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 7036 "calling backlight_device_unregister()\n"); 7037 backlight_device_unregister(ibm_backlight_device); 7038 } 7039 7040 tpacpi_brightness_checkpoint_nvram(); 7041 } 7042 7043 static int brightness_read(struct seq_file *m) 7044 { 7045 int level; 7046 7047 level = brightness_get(NULL); 7048 if (level < 0) { 7049 seq_printf(m, "level:\t\tunreadable\n"); 7050 } else { 7051 seq_printf(m, "level:\t\t%d\n", level); 7052 seq_printf(m, "commands:\tup, down\n"); 7053 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7054 bright_maxlvl); 7055 } 7056 7057 return 0; 7058 } 7059 7060 static int brightness_write(char *buf) 7061 { 7062 int level; 7063 int rc; 7064 char *cmd; 7065 7066 level = brightness_get(NULL); 7067 if (level < 0) 7068 return level; 7069 7070 while ((cmd = next_cmd(&buf))) { 7071 if (strlencmp(cmd, "up") == 0) { 7072 if (level < bright_maxlvl) 7073 level++; 7074 } else if (strlencmp(cmd, "down") == 0) { 7075 if (level > 0) 7076 level--; 7077 } else if (sscanf(cmd, "level %d", &level) == 1 && 7078 level >= 0 && level <= bright_maxlvl) { 7079 /* new level set */ 7080 } else 7081 return -EINVAL; 7082 } 7083 7084 tpacpi_disclose_usertask("procfs brightness", 7085 "set level to %d\n", level); 7086 7087 /* 7088 * Now we know what the final level should be, so we try to set it. 7089 * Doing it this way makes the syscall restartable in case of EINTR 7090 */ 7091 rc = brightness_set(level); 7092 if (!rc && ibm_backlight_device) 7093 backlight_force_update(ibm_backlight_device, 7094 BACKLIGHT_UPDATE_SYSFS); 7095 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7096 } 7097 7098 static struct ibm_struct brightness_driver_data = { 7099 .name = "brightness", 7100 .read = brightness_read, 7101 .write = brightness_write, 7102 .exit = brightness_exit, 7103 .suspend = brightness_suspend, 7104 .shutdown = brightness_shutdown, 7105 }; 7106 7107 /************************************************************************* 7108 * Volume subdriver 7109 */ 7110 7111 /* 7112 * IBM ThinkPads have a simple volume controller with MUTE gating. 7113 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 7114 * 7115 * Since the *61 series (and probably also the later *60 series), Lenovo 7116 * ThinkPads only implement the MUTE gate. 7117 * 7118 * EC register 0x30 7119 * Bit 6: MUTE (1 mutes sound) 7120 * Bit 3-0: Volume 7121 * Other bits should be zero as far as we know. 7122 * 7123 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 7124 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 7125 * such as bit 7 which is used to detect repeated presses of MUTE, 7126 * and we leave them unchanged. 7127 * 7128 * On newer Lenovo ThinkPads, the EC can automatically change the volume 7129 * in response to user input. Unfortunately, this rarely works well. 7130 * The laptop changes the state of its internal MUTE gate and, on some 7131 * models, sends KEY_MUTE, causing any user code that responds to the 7132 * mute button to get confused. The hardware MUTE gate is also 7133 * unnecessary, since user code can handle the mute button without 7134 * kernel or EC help. 7135 * 7136 * To avoid confusing userspace, we simply disable all EC-based mute 7137 * and volume controls when possible. 7138 */ 7139 7140 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 7141 7142 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 7143 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 7144 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 7145 7146 #if SNDRV_CARDS <= 32 7147 #define DEFAULT_ALSA_IDX ~((1 << (SNDRV_CARDS - 3)) - 1) 7148 #else 7149 #define DEFAULT_ALSA_IDX ~((1 << (32 - 3)) - 1) 7150 #endif 7151 static int alsa_index = DEFAULT_ALSA_IDX; /* last three slots */ 7152 static char *alsa_id = "ThinkPadEC"; 7153 static bool alsa_enable = SNDRV_DEFAULT_ENABLE1; 7154 7155 struct tpacpi_alsa_data { 7156 struct snd_card *card; 7157 struct snd_ctl_elem_id *ctl_mute_id; 7158 struct snd_ctl_elem_id *ctl_vol_id; 7159 }; 7160 7161 static struct snd_card *alsa_card; 7162 7163 enum { 7164 TP_EC_AUDIO = 0x30, 7165 7166 /* TP_EC_AUDIO bits */ 7167 TP_EC_AUDIO_MUTESW = 6, 7168 7169 /* TP_EC_AUDIO bitmasks */ 7170 TP_EC_AUDIO_LVL_MSK = 0x0F, 7171 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 7172 7173 /* Maximum volume */ 7174 TP_EC_VOLUME_MAX = 14, 7175 }; 7176 7177 enum tpacpi_volume_access_mode { 7178 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 7179 TPACPI_VOL_MODE_EC, /* Pure EC control */ 7180 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 7181 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 7182 TPACPI_VOL_MODE_MAX 7183 }; 7184 7185 enum tpacpi_volume_capabilities { 7186 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 7187 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 7188 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 7189 TPACPI_VOL_CAP_MAX 7190 }; 7191 7192 enum tpacpi_mute_btn_mode { 7193 TP_EC_MUTE_BTN_LATCH = 0, /* Mute mutes; up/down unmutes */ 7194 /* We don't know what mode 1 is. */ 7195 TP_EC_MUTE_BTN_NONE = 2, /* Mute and up/down are just keys */ 7196 TP_EC_MUTE_BTN_TOGGLE = 3, /* Mute toggles; up/down unmutes */ 7197 }; 7198 7199 static enum tpacpi_volume_access_mode volume_mode = 7200 TPACPI_VOL_MODE_MAX; 7201 7202 static enum tpacpi_volume_capabilities volume_capabilities; 7203 static bool volume_control_allowed; 7204 static bool software_mute_requested = true; 7205 static bool software_mute_active; 7206 static int software_mute_orig_mode; 7207 7208 /* 7209 * Used to syncronize writers to TP_EC_AUDIO and 7210 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 7211 */ 7212 static struct mutex volume_mutex; 7213 7214 static void tpacpi_volume_checkpoint_nvram(void) 7215 { 7216 u8 lec = 0; 7217 u8 b_nvram; 7218 u8 ec_mask; 7219 7220 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 7221 return; 7222 if (!volume_control_allowed) 7223 return; 7224 if (software_mute_active) 7225 return; 7226 7227 vdbg_printk(TPACPI_DBG_MIXER, 7228 "trying to checkpoint mixer state to NVRAM...\n"); 7229 7230 if (tp_features.mixer_no_level_control) 7231 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 7232 else 7233 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 7234 7235 if (mutex_lock_killable(&volume_mutex) < 0) 7236 return; 7237 7238 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 7239 goto unlock; 7240 lec &= ec_mask; 7241 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 7242 7243 if (lec != (b_nvram & ec_mask)) { 7244 /* NVRAM needs update */ 7245 b_nvram &= ~ec_mask; 7246 b_nvram |= lec; 7247 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 7248 dbg_printk(TPACPI_DBG_MIXER, 7249 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 7250 (unsigned int) lec, (unsigned int) b_nvram); 7251 } else { 7252 vdbg_printk(TPACPI_DBG_MIXER, 7253 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 7254 (unsigned int) lec, (unsigned int) b_nvram); 7255 } 7256 7257 unlock: 7258 mutex_unlock(&volume_mutex); 7259 } 7260 7261 static int volume_get_status_ec(u8 *status) 7262 { 7263 u8 s; 7264 7265 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 7266 return -EIO; 7267 7268 *status = s; 7269 7270 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 7271 7272 return 0; 7273 } 7274 7275 static int volume_get_status(u8 *status) 7276 { 7277 return volume_get_status_ec(status); 7278 } 7279 7280 static int volume_set_status_ec(const u8 status) 7281 { 7282 if (!acpi_ec_write(TP_EC_AUDIO, status)) 7283 return -EIO; 7284 7285 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 7286 7287 /* 7288 * On X200s, and possibly on others, it can take a while for 7289 * reads to become correct. 7290 */ 7291 msleep(1); 7292 7293 return 0; 7294 } 7295 7296 static int volume_set_status(const u8 status) 7297 { 7298 return volume_set_status_ec(status); 7299 } 7300 7301 /* returns < 0 on error, 0 on no change, 1 on change */ 7302 static int __volume_set_mute_ec(const bool mute) 7303 { 7304 int rc; 7305 u8 s, n; 7306 7307 if (mutex_lock_killable(&volume_mutex) < 0) 7308 return -EINTR; 7309 7310 rc = volume_get_status_ec(&s); 7311 if (rc) 7312 goto unlock; 7313 7314 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 7315 s & ~TP_EC_AUDIO_MUTESW_MSK; 7316 7317 if (n != s) { 7318 rc = volume_set_status_ec(n); 7319 if (!rc) 7320 rc = 1; 7321 } 7322 7323 unlock: 7324 mutex_unlock(&volume_mutex); 7325 return rc; 7326 } 7327 7328 static int volume_alsa_set_mute(const bool mute) 7329 { 7330 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 7331 (mute) ? "" : "un"); 7332 return __volume_set_mute_ec(mute); 7333 } 7334 7335 static int volume_set_mute(const bool mute) 7336 { 7337 int rc; 7338 7339 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 7340 (mute) ? "" : "un"); 7341 7342 rc = __volume_set_mute_ec(mute); 7343 return (rc < 0) ? rc : 0; 7344 } 7345 7346 /* returns < 0 on error, 0 on no change, 1 on change */ 7347 static int __volume_set_volume_ec(const u8 vol) 7348 { 7349 int rc; 7350 u8 s, n; 7351 7352 if (vol > TP_EC_VOLUME_MAX) 7353 return -EINVAL; 7354 7355 if (mutex_lock_killable(&volume_mutex) < 0) 7356 return -EINTR; 7357 7358 rc = volume_get_status_ec(&s); 7359 if (rc) 7360 goto unlock; 7361 7362 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 7363 7364 if (n != s) { 7365 rc = volume_set_status_ec(n); 7366 if (!rc) 7367 rc = 1; 7368 } 7369 7370 unlock: 7371 mutex_unlock(&volume_mutex); 7372 return rc; 7373 } 7374 7375 static int volume_set_software_mute(bool startup) 7376 { 7377 int result; 7378 7379 if (!tpacpi_is_lenovo()) 7380 return -ENODEV; 7381 7382 if (startup) { 7383 if (!acpi_evalf(ec_handle, &software_mute_orig_mode, 7384 "HAUM", "qd")) 7385 return -EIO; 7386 7387 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7388 "Initial HAUM setting was %d\n", 7389 software_mute_orig_mode); 7390 } 7391 7392 if (!acpi_evalf(ec_handle, &result, "SAUM", "qdd", 7393 (int)TP_EC_MUTE_BTN_NONE)) 7394 return -EIO; 7395 7396 if (result != TP_EC_MUTE_BTN_NONE) 7397 pr_warn("Unexpected SAUM result %d\n", 7398 result); 7399 7400 /* 7401 * In software mute mode, the standard codec controls take 7402 * precendence, so we unmute the ThinkPad HW switch at 7403 * startup. Just on case there are SAUM-capable ThinkPads 7404 * with level controls, set max HW volume as well. 7405 */ 7406 if (tp_features.mixer_no_level_control) 7407 result = volume_set_mute(false); 7408 else 7409 result = volume_set_status(TP_EC_VOLUME_MAX); 7410 7411 if (result != 0) 7412 pr_warn("Failed to unmute the HW mute switch\n"); 7413 7414 return 0; 7415 } 7416 7417 static void volume_exit_software_mute(void) 7418 { 7419 int r; 7420 7421 if (!acpi_evalf(ec_handle, &r, "SAUM", "qdd", software_mute_orig_mode) 7422 || r != software_mute_orig_mode) 7423 pr_warn("Failed to restore mute mode\n"); 7424 } 7425 7426 static int volume_alsa_set_volume(const u8 vol) 7427 { 7428 dbg_printk(TPACPI_DBG_MIXER, 7429 "ALSA: trying to set volume level to %hu\n", vol); 7430 return __volume_set_volume_ec(vol); 7431 } 7432 7433 static void volume_alsa_notify_change(void) 7434 { 7435 struct tpacpi_alsa_data *d; 7436 7437 if (alsa_card && alsa_card->private_data) { 7438 d = alsa_card->private_data; 7439 if (d->ctl_mute_id) 7440 snd_ctl_notify(alsa_card, 7441 SNDRV_CTL_EVENT_MASK_VALUE, 7442 d->ctl_mute_id); 7443 if (d->ctl_vol_id) 7444 snd_ctl_notify(alsa_card, 7445 SNDRV_CTL_EVENT_MASK_VALUE, 7446 d->ctl_vol_id); 7447 } 7448 } 7449 7450 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 7451 struct snd_ctl_elem_info *uinfo) 7452 { 7453 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 7454 uinfo->count = 1; 7455 uinfo->value.integer.min = 0; 7456 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 7457 return 0; 7458 } 7459 7460 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 7461 struct snd_ctl_elem_value *ucontrol) 7462 { 7463 u8 s; 7464 int rc; 7465 7466 rc = volume_get_status(&s); 7467 if (rc < 0) 7468 return rc; 7469 7470 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 7471 return 0; 7472 } 7473 7474 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 7475 struct snd_ctl_elem_value *ucontrol) 7476 { 7477 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 7478 ucontrol->value.integer.value[0]); 7479 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 7480 } 7481 7482 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 7483 7484 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 7485 struct snd_ctl_elem_value *ucontrol) 7486 { 7487 u8 s; 7488 int rc; 7489 7490 rc = volume_get_status(&s); 7491 if (rc < 0) 7492 return rc; 7493 7494 ucontrol->value.integer.value[0] = 7495 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 7496 return 0; 7497 } 7498 7499 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 7500 struct snd_ctl_elem_value *ucontrol) 7501 { 7502 tpacpi_disclose_usertask("ALSA", "%smute\n", 7503 ucontrol->value.integer.value[0] ? 7504 "un" : ""); 7505 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 7506 } 7507 7508 static struct snd_kcontrol_new volume_alsa_control_vol __initdata = { 7509 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7510 .name = "Console Playback Volume", 7511 .index = 0, 7512 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7513 .info = volume_alsa_vol_info, 7514 .get = volume_alsa_vol_get, 7515 }; 7516 7517 static struct snd_kcontrol_new volume_alsa_control_mute __initdata = { 7518 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 7519 .name = "Console Playback Switch", 7520 .index = 0, 7521 .access = SNDRV_CTL_ELEM_ACCESS_READ, 7522 .info = volume_alsa_mute_info, 7523 .get = volume_alsa_mute_get, 7524 }; 7525 7526 static void volume_suspend(void) 7527 { 7528 tpacpi_volume_checkpoint_nvram(); 7529 } 7530 7531 static void volume_resume(void) 7532 { 7533 if (software_mute_active) { 7534 if (volume_set_software_mute(false) < 0) 7535 pr_warn("Failed to restore software mute\n"); 7536 } else { 7537 volume_alsa_notify_change(); 7538 } 7539 } 7540 7541 static void volume_shutdown(void) 7542 { 7543 tpacpi_volume_checkpoint_nvram(); 7544 } 7545 7546 static void volume_exit(void) 7547 { 7548 if (alsa_card) { 7549 snd_card_free(alsa_card); 7550 alsa_card = NULL; 7551 } 7552 7553 tpacpi_volume_checkpoint_nvram(); 7554 7555 if (software_mute_active) 7556 volume_exit_software_mute(); 7557 } 7558 7559 static int __init volume_create_alsa_mixer(void) 7560 { 7561 struct snd_card *card; 7562 struct tpacpi_alsa_data *data; 7563 struct snd_kcontrol *ctl_vol; 7564 struct snd_kcontrol *ctl_mute; 7565 int rc; 7566 7567 rc = snd_card_new(&tpacpi_pdev->dev, 7568 alsa_index, alsa_id, THIS_MODULE, 7569 sizeof(struct tpacpi_alsa_data), &card); 7570 if (rc < 0 || !card) { 7571 pr_err("Failed to create ALSA card structures: %d\n", rc); 7572 return 1; 7573 } 7574 7575 BUG_ON(!card->private_data); 7576 data = card->private_data; 7577 data->card = card; 7578 7579 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 7580 sizeof(card->driver)); 7581 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 7582 sizeof(card->shortname)); 7583 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 7584 (thinkpad_id.ec_version_str) ? 7585 thinkpad_id.ec_version_str : "(unknown)"); 7586 snprintf(card->longname, sizeof(card->longname), 7587 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 7588 (thinkpad_id.ec_version_str) ? 7589 thinkpad_id.ec_version_str : "unknown"); 7590 7591 if (volume_control_allowed) { 7592 volume_alsa_control_vol.put = volume_alsa_vol_put; 7593 volume_alsa_control_vol.access = 7594 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7595 7596 volume_alsa_control_mute.put = volume_alsa_mute_put; 7597 volume_alsa_control_mute.access = 7598 SNDRV_CTL_ELEM_ACCESS_READWRITE; 7599 } 7600 7601 if (!tp_features.mixer_no_level_control) { 7602 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 7603 rc = snd_ctl_add(card, ctl_vol); 7604 if (rc < 0) { 7605 pr_err("Failed to create ALSA volume control: %d\n", 7606 rc); 7607 goto err_exit; 7608 } 7609 data->ctl_vol_id = &ctl_vol->id; 7610 } 7611 7612 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 7613 rc = snd_ctl_add(card, ctl_mute); 7614 if (rc < 0) { 7615 pr_err("Failed to create ALSA mute control: %d\n", rc); 7616 goto err_exit; 7617 } 7618 data->ctl_mute_id = &ctl_mute->id; 7619 7620 rc = snd_card_register(card); 7621 if (rc < 0) { 7622 pr_err("Failed to register ALSA card: %d\n", rc); 7623 goto err_exit; 7624 } 7625 7626 alsa_card = card; 7627 return 0; 7628 7629 err_exit: 7630 snd_card_free(card); 7631 return 1; 7632 } 7633 7634 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 7635 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 7636 7637 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 7638 /* Whitelist volume level on all IBM by default */ 7639 { .vendor = PCI_VENDOR_ID_IBM, 7640 .bios = TPACPI_MATCH_ANY, 7641 .ec = TPACPI_MATCH_ANY, 7642 .quirks = TPACPI_VOL_Q_LEVEL }, 7643 7644 /* Lenovo models with volume control (needs confirmation) */ 7645 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 7646 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 7647 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 7648 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 7649 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 7650 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 7651 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 7652 7653 /* Whitelist mute-only on all Lenovo by default */ 7654 { .vendor = PCI_VENDOR_ID_LENOVO, 7655 .bios = TPACPI_MATCH_ANY, 7656 .ec = TPACPI_MATCH_ANY, 7657 .quirks = TPACPI_VOL_Q_MUTEONLY } 7658 }; 7659 7660 static int __init volume_init(struct ibm_init_struct *iibm) 7661 { 7662 unsigned long quirks; 7663 int rc; 7664 7665 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 7666 7667 mutex_init(&volume_mutex); 7668 7669 /* 7670 * Check for module parameter bogosity, note that we 7671 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 7672 * able to detect "unspecified" 7673 */ 7674 if (volume_mode > TPACPI_VOL_MODE_MAX) 7675 return -EINVAL; 7676 7677 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 7678 pr_err("UCMS step volume mode not implemented, please contact %s\n", 7679 TPACPI_MAIL); 7680 return 1; 7681 } 7682 7683 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 7684 return -EINVAL; 7685 7686 /* 7687 * The ALSA mixer is our primary interface. 7688 * When disabled, don't install the subdriver at all 7689 */ 7690 if (!alsa_enable) { 7691 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7692 "ALSA mixer disabled by parameter, not loading volume subdriver...\n"); 7693 return 1; 7694 } 7695 7696 quirks = tpacpi_check_quirks(volume_quirk_table, 7697 ARRAY_SIZE(volume_quirk_table)); 7698 7699 switch (volume_capabilities) { 7700 case TPACPI_VOL_CAP_AUTO: 7701 if (quirks & TPACPI_VOL_Q_MUTEONLY) 7702 tp_features.mixer_no_level_control = 1; 7703 else if (quirks & TPACPI_VOL_Q_LEVEL) 7704 tp_features.mixer_no_level_control = 0; 7705 else 7706 return 1; /* no mixer */ 7707 break; 7708 case TPACPI_VOL_CAP_VOLMUTE: 7709 tp_features.mixer_no_level_control = 0; 7710 break; 7711 case TPACPI_VOL_CAP_MUTEONLY: 7712 tp_features.mixer_no_level_control = 1; 7713 break; 7714 default: 7715 return 1; 7716 } 7717 7718 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 7719 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7720 "using user-supplied volume_capabilities=%d\n", 7721 volume_capabilities); 7722 7723 if (volume_mode == TPACPI_VOL_MODE_AUTO || 7724 volume_mode == TPACPI_VOL_MODE_MAX) { 7725 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 7726 7727 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7728 "driver auto-selected volume_mode=%d\n", 7729 volume_mode); 7730 } else { 7731 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7732 "using user-supplied volume_mode=%d\n", 7733 volume_mode); 7734 } 7735 7736 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7737 "mute is supported, volume control is %s\n", 7738 str_supported(!tp_features.mixer_no_level_control)); 7739 7740 if (software_mute_requested && volume_set_software_mute(true) == 0) { 7741 software_mute_active = true; 7742 } else { 7743 rc = volume_create_alsa_mixer(); 7744 if (rc) { 7745 pr_err("Could not create the ALSA mixer interface\n"); 7746 return rc; 7747 } 7748 7749 pr_info("Console audio control enabled, mode: %s\n", 7750 (volume_control_allowed) ? 7751 "override (read/write)" : 7752 "monitor (read only)"); 7753 } 7754 7755 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 7756 "registering volume hotkeys as change notification\n"); 7757 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 7758 | TP_ACPI_HKEY_VOLUP_MASK 7759 | TP_ACPI_HKEY_VOLDWN_MASK 7760 | TP_ACPI_HKEY_MUTE_MASK); 7761 7762 return 0; 7763 } 7764 7765 static int volume_read(struct seq_file *m) 7766 { 7767 u8 status; 7768 7769 if (volume_get_status(&status) < 0) { 7770 seq_printf(m, "level:\t\tunreadable\n"); 7771 } else { 7772 if (tp_features.mixer_no_level_control) 7773 seq_printf(m, "level:\t\tunsupported\n"); 7774 else 7775 seq_printf(m, "level:\t\t%d\n", 7776 status & TP_EC_AUDIO_LVL_MSK); 7777 7778 seq_printf(m, "mute:\t\t%s\n", 7779 onoff(status, TP_EC_AUDIO_MUTESW)); 7780 7781 if (volume_control_allowed) { 7782 seq_printf(m, "commands:\tunmute, mute\n"); 7783 if (!tp_features.mixer_no_level_control) { 7784 seq_printf(m, "commands:\tup, down\n"); 7785 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 7786 TP_EC_VOLUME_MAX); 7787 } 7788 } 7789 } 7790 7791 return 0; 7792 } 7793 7794 static int volume_write(char *buf) 7795 { 7796 u8 s; 7797 u8 new_level, new_mute; 7798 int l; 7799 char *cmd; 7800 int rc; 7801 7802 /* 7803 * We do allow volume control at driver startup, so that the 7804 * user can set initial state through the volume=... parameter hack. 7805 */ 7806 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7807 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7808 tp_warned.volume_ctrl_forbidden = 1; 7809 pr_notice("Console audio control in monitor mode, changes are not allowed\n"); 7810 pr_notice("Use the volume_control=1 module parameter to enable volume control\n"); 7811 } 7812 return -EPERM; 7813 } 7814 7815 rc = volume_get_status(&s); 7816 if (rc < 0) 7817 return rc; 7818 7819 new_level = s & TP_EC_AUDIO_LVL_MSK; 7820 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7821 7822 while ((cmd = next_cmd(&buf))) { 7823 if (!tp_features.mixer_no_level_control) { 7824 if (strlencmp(cmd, "up") == 0) { 7825 if (new_mute) 7826 new_mute = 0; 7827 else if (new_level < TP_EC_VOLUME_MAX) 7828 new_level++; 7829 continue; 7830 } else if (strlencmp(cmd, "down") == 0) { 7831 if (new_mute) 7832 new_mute = 0; 7833 else if (new_level > 0) 7834 new_level--; 7835 continue; 7836 } else if (sscanf(cmd, "level %u", &l) == 1 && 7837 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7838 new_level = l; 7839 continue; 7840 } 7841 } 7842 if (strlencmp(cmd, "mute") == 0) 7843 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7844 else if (strlencmp(cmd, "unmute") == 0) 7845 new_mute = 0; 7846 else 7847 return -EINVAL; 7848 } 7849 7850 if (tp_features.mixer_no_level_control) { 7851 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7852 new_mute ? "" : "un"); 7853 rc = volume_set_mute(!!new_mute); 7854 } else { 7855 tpacpi_disclose_usertask("procfs volume", 7856 "%smute and set level to %d\n", 7857 new_mute ? "" : "un", new_level); 7858 rc = volume_set_status(new_mute | new_level); 7859 } 7860 volume_alsa_notify_change(); 7861 7862 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7863 } 7864 7865 static struct ibm_struct volume_driver_data = { 7866 .name = "volume", 7867 .read = volume_read, 7868 .write = volume_write, 7869 .exit = volume_exit, 7870 .suspend = volume_suspend, 7871 .resume = volume_resume, 7872 .shutdown = volume_shutdown, 7873 }; 7874 7875 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7876 7877 #define alsa_card NULL 7878 7879 static inline void volume_alsa_notify_change(void) 7880 { 7881 } 7882 7883 static int __init volume_init(struct ibm_init_struct *iibm) 7884 { 7885 pr_info("volume: disabled as there is no ALSA support in this kernel\n"); 7886 7887 return 1; 7888 } 7889 7890 static struct ibm_struct volume_driver_data = { 7891 .name = "volume", 7892 }; 7893 7894 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7895 7896 /************************************************************************* 7897 * Fan subdriver 7898 */ 7899 7900 /* 7901 * FAN ACCESS MODES 7902 * 7903 * TPACPI_FAN_RD_ACPI_GFAN: 7904 * ACPI GFAN method: returns fan level 7905 * 7906 * see TPACPI_FAN_WR_ACPI_SFAN 7907 * EC 0x2f (HFSP) not available if GFAN exists 7908 * 7909 * TPACPI_FAN_WR_ACPI_SFAN: 7910 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7911 * 7912 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7913 * it for writing. 7914 * 7915 * TPACPI_FAN_WR_TPEC: 7916 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7917 * Supported on almost all ThinkPads 7918 * 7919 * Fan speed changes of any sort (including those caused by the 7920 * disengaged mode) are usually done slowly by the firmware as the 7921 * maximum amount of fan duty cycle change per second seems to be 7922 * limited. 7923 * 7924 * Reading is not available if GFAN exists. 7925 * Writing is not available if SFAN exists. 7926 * 7927 * Bits 7928 * 7 automatic mode engaged; 7929 * (default operation mode of the ThinkPad) 7930 * fan level is ignored in this mode. 7931 * 6 full speed mode (takes precedence over bit 7); 7932 * not available on all thinkpads. May disable 7933 * the tachometer while the fan controller ramps up 7934 * the speed (which can take up to a few *minutes*). 7935 * Speeds up fan to 100% duty-cycle, which is far above 7936 * the standard RPM levels. It is not impossible that 7937 * it could cause hardware damage. 7938 * 5-3 unused in some models. Extra bits for fan level 7939 * in others, but still useless as all values above 7940 * 7 map to the same speed as level 7 in these models. 7941 * 2-0 fan level (0..7 usually) 7942 * 0x00 = stop 7943 * 0x07 = max (set when temperatures critical) 7944 * Some ThinkPads may have other levels, see 7945 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7946 * 7947 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7948 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7949 * does so, its initial value is meaningless (0x07). 7950 * 7951 * For firmware bugs, refer to: 7952 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7953 * 7954 * ---- 7955 * 7956 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7957 * Main fan tachometer reading (in RPM) 7958 * 7959 * This register is present on all ThinkPads with a new-style EC, and 7960 * it is known not to be present on the A21m/e, and T22, as there is 7961 * something else in offset 0x84 according to the ACPI DSDT. Other 7962 * ThinkPads from this same time period (and earlier) probably lack the 7963 * tachometer as well. 7964 * 7965 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7966 * was never fixed by IBM to report the EC firmware version string 7967 * probably support the tachometer (like the early X models), so 7968 * detecting it is quite hard. We need more data to know for sure. 7969 * 7970 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7971 * might result. 7972 * 7973 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7974 * mode. 7975 * 7976 * For firmware bugs, refer to: 7977 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7978 * 7979 * ---- 7980 * 7981 * ThinkPad EC register 0x31 bit 0 (only on select models) 7982 * 7983 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7984 * show the speed of the main fan. When bit 0 of EC register 0x31 7985 * is one, the tachometer registers show the speed of the auxiliary 7986 * fan. 7987 * 7988 * Fan control seems to affect both fans, regardless of the state 7989 * of this bit. 7990 * 7991 * So far, only the firmware for the X60/X61 non-tablet versions 7992 * seem to support this (firmware TP-7M). 7993 * 7994 * TPACPI_FAN_WR_ACPI_FANS: 7995 * ThinkPad X31, X40, X41. Not available in the X60. 7996 * 7997 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7998 * high speed. ACPI DSDT seems to map these three speeds to levels 7999 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 8000 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 8001 * 8002 * The speeds are stored on handles 8003 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 8004 * 8005 * There are three default speed sets, accessible as handles: 8006 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 8007 * 8008 * ACPI DSDT switches which set is in use depending on various 8009 * factors. 8010 * 8011 * TPACPI_FAN_WR_TPEC is also available and should be used to 8012 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 8013 * but the ACPI tables just mention level 7. 8014 */ 8015 8016 enum { /* Fan control constants */ 8017 fan_status_offset = 0x2f, /* EC register 0x2f */ 8018 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 8019 * 0x84 must be read before 0x85 */ 8020 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 8021 bit 0 selects which fan is active */ 8022 8023 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 8024 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 8025 8026 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 8027 }; 8028 8029 enum fan_status_access_mode { 8030 TPACPI_FAN_NONE = 0, /* No fan status or control */ 8031 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 8032 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 8033 }; 8034 8035 enum fan_control_access_mode { 8036 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 8037 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 8038 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 8039 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 8040 }; 8041 8042 enum fan_control_commands { 8043 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 8044 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 8045 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 8046 * and also watchdog cmd */ 8047 }; 8048 8049 static bool fan_control_allowed; 8050 8051 static enum fan_status_access_mode fan_status_access_mode; 8052 static enum fan_control_access_mode fan_control_access_mode; 8053 static enum fan_control_commands fan_control_commands; 8054 8055 static u8 fan_control_initial_status; 8056 static u8 fan_control_desired_level; 8057 static u8 fan_control_resume_level; 8058 static int fan_watchdog_maxinterval; 8059 8060 static struct mutex fan_mutex; 8061 8062 static void fan_watchdog_fire(struct work_struct *ignored); 8063 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 8064 8065 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 8066 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 8067 "\\FSPD", /* 600e/x, 770e, 770x */ 8068 ); /* all others */ 8069 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 8070 "JFNS", /* 770x-JL */ 8071 ); /* all others */ 8072 8073 /* 8074 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 8075 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 8076 * be in auto mode (0x80). 8077 * 8078 * This is corrected by any write to HFSP either by the driver, or 8079 * by the firmware. 8080 * 8081 * We assume 0x07 really means auto mode while this quirk is active, 8082 * as this is far more likely than the ThinkPad being in level 7, 8083 * which is only used by the firmware during thermal emergencies. 8084 * 8085 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 8086 * TP-70 (T43, R52), which are known to be buggy. 8087 */ 8088 8089 static void fan_quirk1_setup(void) 8090 { 8091 if (fan_control_initial_status == 0x07) { 8092 pr_notice("fan_init: initial fan status is unknown, assuming it is in auto mode\n"); 8093 tp_features.fan_ctrl_status_undef = 1; 8094 } 8095 } 8096 8097 static void fan_quirk1_handle(u8 *fan_status) 8098 { 8099 if (unlikely(tp_features.fan_ctrl_status_undef)) { 8100 if (*fan_status != fan_control_initial_status) { 8101 /* something changed the HFSP regisnter since 8102 * driver init time, so it is not undefined 8103 * anymore */ 8104 tp_features.fan_ctrl_status_undef = 0; 8105 } else { 8106 /* Return most likely status. In fact, it 8107 * might be the only possible status */ 8108 *fan_status = TP_EC_FAN_AUTO; 8109 } 8110 } 8111 } 8112 8113 /* Select main fan on X60/X61, NOOP on others */ 8114 static bool fan_select_fan1(void) 8115 { 8116 if (tp_features.second_fan) { 8117 u8 val; 8118 8119 if (ec_read(fan_select_offset, &val) < 0) 8120 return false; 8121 val &= 0xFEU; 8122 if (ec_write(fan_select_offset, val) < 0) 8123 return false; 8124 } 8125 return true; 8126 } 8127 8128 /* Select secondary fan on X60/X61 */ 8129 static bool fan_select_fan2(void) 8130 { 8131 u8 val; 8132 8133 if (!tp_features.second_fan) 8134 return false; 8135 8136 if (ec_read(fan_select_offset, &val) < 0) 8137 return false; 8138 val |= 0x01U; 8139 if (ec_write(fan_select_offset, val) < 0) 8140 return false; 8141 8142 return true; 8143 } 8144 8145 /* 8146 * Call with fan_mutex held 8147 */ 8148 static void fan_update_desired_level(u8 status) 8149 { 8150 if ((status & 8151 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8152 if (status > 7) 8153 fan_control_desired_level = 7; 8154 else 8155 fan_control_desired_level = status; 8156 } 8157 } 8158 8159 static int fan_get_status(u8 *status) 8160 { 8161 u8 s; 8162 8163 /* TODO: 8164 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 8165 8166 switch (fan_status_access_mode) { 8167 case TPACPI_FAN_RD_ACPI_GFAN: { 8168 /* 570, 600e/x, 770e, 770x */ 8169 int res; 8170 8171 if (unlikely(!acpi_evalf(gfan_handle, &res, NULL, "d"))) 8172 return -EIO; 8173 8174 if (likely(status)) 8175 *status = res & 0x07; 8176 8177 break; 8178 } 8179 case TPACPI_FAN_RD_TPEC: 8180 /* all except 570, 600e/x, 770e, 770x */ 8181 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 8182 return -EIO; 8183 8184 if (likely(status)) { 8185 *status = s; 8186 fan_quirk1_handle(status); 8187 } 8188 8189 break; 8190 8191 default: 8192 return -ENXIO; 8193 } 8194 8195 return 0; 8196 } 8197 8198 static int fan_get_status_safe(u8 *status) 8199 { 8200 int rc; 8201 u8 s; 8202 8203 if (mutex_lock_killable(&fan_mutex)) 8204 return -ERESTARTSYS; 8205 rc = fan_get_status(&s); 8206 if (!rc) 8207 fan_update_desired_level(s); 8208 mutex_unlock(&fan_mutex); 8209 8210 if (rc) 8211 return rc; 8212 if (status) 8213 *status = s; 8214 8215 return 0; 8216 } 8217 8218 static int fan_get_speed(unsigned int *speed) 8219 { 8220 u8 hi, lo; 8221 8222 switch (fan_status_access_mode) { 8223 case TPACPI_FAN_RD_TPEC: 8224 /* all except 570, 600e/x, 770e, 770x */ 8225 if (unlikely(!fan_select_fan1())) 8226 return -EIO; 8227 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 8228 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 8229 return -EIO; 8230 8231 if (likely(speed)) 8232 *speed = (hi << 8) | lo; 8233 8234 break; 8235 8236 default: 8237 return -ENXIO; 8238 } 8239 8240 return 0; 8241 } 8242 8243 static int fan2_get_speed(unsigned int *speed) 8244 { 8245 u8 hi, lo; 8246 bool rc; 8247 8248 switch (fan_status_access_mode) { 8249 case TPACPI_FAN_RD_TPEC: 8250 /* all except 570, 600e/x, 770e, 770x */ 8251 if (unlikely(!fan_select_fan2())) 8252 return -EIO; 8253 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 8254 !acpi_ec_read(fan_rpm_offset + 1, &hi); 8255 fan_select_fan1(); /* play it safe */ 8256 if (rc) 8257 return -EIO; 8258 8259 if (likely(speed)) 8260 *speed = (hi << 8) | lo; 8261 8262 break; 8263 8264 default: 8265 return -ENXIO; 8266 } 8267 8268 return 0; 8269 } 8270 8271 static int fan_set_level(int level) 8272 { 8273 if (!fan_control_allowed) 8274 return -EPERM; 8275 8276 switch (fan_control_access_mode) { 8277 case TPACPI_FAN_WR_ACPI_SFAN: 8278 if (level >= 0 && level <= 7) { 8279 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 8280 return -EIO; 8281 } else 8282 return -EINVAL; 8283 break; 8284 8285 case TPACPI_FAN_WR_ACPI_FANS: 8286 case TPACPI_FAN_WR_TPEC: 8287 if (!(level & TP_EC_FAN_AUTO) && 8288 !(level & TP_EC_FAN_FULLSPEED) && 8289 ((level < 0) || (level > 7))) 8290 return -EINVAL; 8291 8292 /* safety net should the EC not support AUTO 8293 * or FULLSPEED mode bits and just ignore them */ 8294 if (level & TP_EC_FAN_FULLSPEED) 8295 level |= 7; /* safety min speed 7 */ 8296 else if (level & TP_EC_FAN_AUTO) 8297 level |= 4; /* safety min speed 4 */ 8298 8299 if (!acpi_ec_write(fan_status_offset, level)) 8300 return -EIO; 8301 else 8302 tp_features.fan_ctrl_status_undef = 0; 8303 break; 8304 8305 default: 8306 return -ENXIO; 8307 } 8308 8309 vdbg_printk(TPACPI_DBG_FAN, 8310 "fan control: set fan control register to 0x%02x\n", level); 8311 return 0; 8312 } 8313 8314 static int fan_set_level_safe(int level) 8315 { 8316 int rc; 8317 8318 if (!fan_control_allowed) 8319 return -EPERM; 8320 8321 if (mutex_lock_killable(&fan_mutex)) 8322 return -ERESTARTSYS; 8323 8324 if (level == TPACPI_FAN_LAST_LEVEL) 8325 level = fan_control_desired_level; 8326 8327 rc = fan_set_level(level); 8328 if (!rc) 8329 fan_update_desired_level(level); 8330 8331 mutex_unlock(&fan_mutex); 8332 return rc; 8333 } 8334 8335 static int fan_set_enable(void) 8336 { 8337 u8 s; 8338 int rc; 8339 8340 if (!fan_control_allowed) 8341 return -EPERM; 8342 8343 if (mutex_lock_killable(&fan_mutex)) 8344 return -ERESTARTSYS; 8345 8346 switch (fan_control_access_mode) { 8347 case TPACPI_FAN_WR_ACPI_FANS: 8348 case TPACPI_FAN_WR_TPEC: 8349 rc = fan_get_status(&s); 8350 if (rc < 0) 8351 break; 8352 8353 /* Don't go out of emergency fan mode */ 8354 if (s != 7) { 8355 s &= 0x07; 8356 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 8357 } 8358 8359 if (!acpi_ec_write(fan_status_offset, s)) 8360 rc = -EIO; 8361 else { 8362 tp_features.fan_ctrl_status_undef = 0; 8363 rc = 0; 8364 } 8365 break; 8366 8367 case TPACPI_FAN_WR_ACPI_SFAN: 8368 rc = fan_get_status(&s); 8369 if (rc < 0) 8370 break; 8371 8372 s &= 0x07; 8373 8374 /* Set fan to at least level 4 */ 8375 s |= 4; 8376 8377 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 8378 rc = -EIO; 8379 else 8380 rc = 0; 8381 break; 8382 8383 default: 8384 rc = -ENXIO; 8385 } 8386 8387 mutex_unlock(&fan_mutex); 8388 8389 if (!rc) 8390 vdbg_printk(TPACPI_DBG_FAN, 8391 "fan control: set fan control register to 0x%02x\n", 8392 s); 8393 return rc; 8394 } 8395 8396 static int fan_set_disable(void) 8397 { 8398 int rc; 8399 8400 if (!fan_control_allowed) 8401 return -EPERM; 8402 8403 if (mutex_lock_killable(&fan_mutex)) 8404 return -ERESTARTSYS; 8405 8406 rc = 0; 8407 switch (fan_control_access_mode) { 8408 case TPACPI_FAN_WR_ACPI_FANS: 8409 case TPACPI_FAN_WR_TPEC: 8410 if (!acpi_ec_write(fan_status_offset, 0x00)) 8411 rc = -EIO; 8412 else { 8413 fan_control_desired_level = 0; 8414 tp_features.fan_ctrl_status_undef = 0; 8415 } 8416 break; 8417 8418 case TPACPI_FAN_WR_ACPI_SFAN: 8419 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 8420 rc = -EIO; 8421 else 8422 fan_control_desired_level = 0; 8423 break; 8424 8425 default: 8426 rc = -ENXIO; 8427 } 8428 8429 if (!rc) 8430 vdbg_printk(TPACPI_DBG_FAN, 8431 "fan control: set fan control register to 0\n"); 8432 8433 mutex_unlock(&fan_mutex); 8434 return rc; 8435 } 8436 8437 static int fan_set_speed(int speed) 8438 { 8439 int rc; 8440 8441 if (!fan_control_allowed) 8442 return -EPERM; 8443 8444 if (mutex_lock_killable(&fan_mutex)) 8445 return -ERESTARTSYS; 8446 8447 rc = 0; 8448 switch (fan_control_access_mode) { 8449 case TPACPI_FAN_WR_ACPI_FANS: 8450 if (speed >= 0 && speed <= 65535) { 8451 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 8452 speed, speed, speed)) 8453 rc = -EIO; 8454 } else 8455 rc = -EINVAL; 8456 break; 8457 8458 default: 8459 rc = -ENXIO; 8460 } 8461 8462 mutex_unlock(&fan_mutex); 8463 return rc; 8464 } 8465 8466 static void fan_watchdog_reset(void) 8467 { 8468 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 8469 return; 8470 8471 if (fan_watchdog_maxinterval > 0 && 8472 tpacpi_lifecycle != TPACPI_LIFE_EXITING) 8473 mod_delayed_work(tpacpi_wq, &fan_watchdog_task, 8474 msecs_to_jiffies(fan_watchdog_maxinterval * 1000)); 8475 else 8476 cancel_delayed_work(&fan_watchdog_task); 8477 } 8478 8479 static void fan_watchdog_fire(struct work_struct *ignored) 8480 { 8481 int rc; 8482 8483 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 8484 return; 8485 8486 pr_notice("fan watchdog: enabling fan\n"); 8487 rc = fan_set_enable(); 8488 if (rc < 0) { 8489 pr_err("fan watchdog: error %d while enabling fan, will try again later...\n", 8490 rc); 8491 /* reschedule for later */ 8492 fan_watchdog_reset(); 8493 } 8494 } 8495 8496 /* 8497 * SYSFS fan layout: hwmon compatible (device) 8498 * 8499 * pwm*_enable: 8500 * 0: "disengaged" mode 8501 * 1: manual mode 8502 * 2: native EC "auto" mode (recommended, hardware default) 8503 * 8504 * pwm*: set speed in manual mode, ignored otherwise. 8505 * 0 is level 0; 255 is level 7. Intermediate points done with linear 8506 * interpolation. 8507 * 8508 * fan*_input: tachometer reading, RPM 8509 * 8510 * 8511 * SYSFS fan layout: extensions 8512 * 8513 * fan_watchdog (driver): 8514 * fan watchdog interval in seconds, 0 disables (default), max 120 8515 */ 8516 8517 /* sysfs fan pwm1_enable ----------------------------------------------- */ 8518 static ssize_t fan_pwm1_enable_show(struct device *dev, 8519 struct device_attribute *attr, 8520 char *buf) 8521 { 8522 int res, mode; 8523 u8 status; 8524 8525 res = fan_get_status_safe(&status); 8526 if (res) 8527 return res; 8528 8529 if (status & TP_EC_FAN_FULLSPEED) { 8530 mode = 0; 8531 } else if (status & TP_EC_FAN_AUTO) { 8532 mode = 2; 8533 } else 8534 mode = 1; 8535 8536 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 8537 } 8538 8539 static ssize_t fan_pwm1_enable_store(struct device *dev, 8540 struct device_attribute *attr, 8541 const char *buf, size_t count) 8542 { 8543 unsigned long t; 8544 int res, level; 8545 8546 if (parse_strtoul(buf, 2, &t)) 8547 return -EINVAL; 8548 8549 tpacpi_disclose_usertask("hwmon pwm1_enable", 8550 "set fan mode to %lu\n", t); 8551 8552 switch (t) { 8553 case 0: 8554 level = TP_EC_FAN_FULLSPEED; 8555 break; 8556 case 1: 8557 level = TPACPI_FAN_LAST_LEVEL; 8558 break; 8559 case 2: 8560 level = TP_EC_FAN_AUTO; 8561 break; 8562 case 3: 8563 /* reserved for software-controlled auto mode */ 8564 return -ENOSYS; 8565 default: 8566 return -EINVAL; 8567 } 8568 8569 res = fan_set_level_safe(level); 8570 if (res == -ENXIO) 8571 return -EINVAL; 8572 else if (res < 0) 8573 return res; 8574 8575 fan_watchdog_reset(); 8576 8577 return count; 8578 } 8579 8580 static DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 8581 fan_pwm1_enable_show, fan_pwm1_enable_store); 8582 8583 /* sysfs fan pwm1 ------------------------------------------------------ */ 8584 static ssize_t fan_pwm1_show(struct device *dev, 8585 struct device_attribute *attr, 8586 char *buf) 8587 { 8588 int res; 8589 u8 status; 8590 8591 res = fan_get_status_safe(&status); 8592 if (res) 8593 return res; 8594 8595 if ((status & 8596 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 8597 status = fan_control_desired_level; 8598 8599 if (status > 7) 8600 status = 7; 8601 8602 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 8603 } 8604 8605 static ssize_t fan_pwm1_store(struct device *dev, 8606 struct device_attribute *attr, 8607 const char *buf, size_t count) 8608 { 8609 unsigned long s; 8610 int rc; 8611 u8 status, newlevel; 8612 8613 if (parse_strtoul(buf, 255, &s)) 8614 return -EINVAL; 8615 8616 tpacpi_disclose_usertask("hwmon pwm1", 8617 "set fan speed to %lu\n", s); 8618 8619 /* scale down from 0-255 to 0-7 */ 8620 newlevel = (s >> 5) & 0x07; 8621 8622 if (mutex_lock_killable(&fan_mutex)) 8623 return -ERESTARTSYS; 8624 8625 rc = fan_get_status(&status); 8626 if (!rc && (status & 8627 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 8628 rc = fan_set_level(newlevel); 8629 if (rc == -ENXIO) 8630 rc = -EINVAL; 8631 else if (!rc) { 8632 fan_update_desired_level(newlevel); 8633 fan_watchdog_reset(); 8634 } 8635 } 8636 8637 mutex_unlock(&fan_mutex); 8638 return (rc) ? rc : count; 8639 } 8640 8641 static DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, fan_pwm1_show, fan_pwm1_store); 8642 8643 /* sysfs fan fan1_input ------------------------------------------------ */ 8644 static ssize_t fan_fan1_input_show(struct device *dev, 8645 struct device_attribute *attr, 8646 char *buf) 8647 { 8648 int res; 8649 unsigned int speed; 8650 8651 res = fan_get_speed(&speed); 8652 if (res < 0) 8653 return res; 8654 8655 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8656 } 8657 8658 static DEVICE_ATTR(fan1_input, S_IRUGO, fan_fan1_input_show, NULL); 8659 8660 /* sysfs fan fan2_input ------------------------------------------------ */ 8661 static ssize_t fan_fan2_input_show(struct device *dev, 8662 struct device_attribute *attr, 8663 char *buf) 8664 { 8665 int res; 8666 unsigned int speed; 8667 8668 res = fan2_get_speed(&speed); 8669 if (res < 0) 8670 return res; 8671 8672 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 8673 } 8674 8675 static DEVICE_ATTR(fan2_input, S_IRUGO, fan_fan2_input_show, NULL); 8676 8677 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 8678 static ssize_t fan_watchdog_show(struct device_driver *drv, char *buf) 8679 { 8680 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 8681 } 8682 8683 static ssize_t fan_watchdog_store(struct device_driver *drv, const char *buf, 8684 size_t count) 8685 { 8686 unsigned long t; 8687 8688 if (parse_strtoul(buf, 120, &t)) 8689 return -EINVAL; 8690 8691 if (!fan_control_allowed) 8692 return -EPERM; 8693 8694 fan_watchdog_maxinterval = t; 8695 fan_watchdog_reset(); 8696 8697 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 8698 8699 return count; 8700 } 8701 static DRIVER_ATTR_RW(fan_watchdog); 8702 8703 /* --------------------------------------------------------------------- */ 8704 static struct attribute *fan_attributes[] = { 8705 &dev_attr_pwm1_enable.attr, &dev_attr_pwm1.attr, 8706 &dev_attr_fan1_input.attr, 8707 NULL, /* for fan2_input */ 8708 NULL 8709 }; 8710 8711 static const struct attribute_group fan_attr_group = { 8712 .attrs = fan_attributes, 8713 }; 8714 8715 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 8716 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 8717 8718 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 8719 TPACPI_QEC_IBM('1', 'Y', TPACPI_FAN_Q1), 8720 TPACPI_QEC_IBM('7', '8', TPACPI_FAN_Q1), 8721 TPACPI_QEC_IBM('7', '6', TPACPI_FAN_Q1), 8722 TPACPI_QEC_IBM('7', '0', TPACPI_FAN_Q1), 8723 TPACPI_QEC_LNV('7', 'M', TPACPI_FAN_2FAN), 8724 TPACPI_Q_LNV('N', '1', TPACPI_FAN_2FAN), 8725 }; 8726 8727 static int __init fan_init(struct ibm_init_struct *iibm) 8728 { 8729 int rc; 8730 unsigned long quirks; 8731 8732 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8733 "initializing fan subdriver\n"); 8734 8735 mutex_init(&fan_mutex); 8736 fan_status_access_mode = TPACPI_FAN_NONE; 8737 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8738 fan_control_commands = 0; 8739 fan_watchdog_maxinterval = 0; 8740 tp_features.fan_ctrl_status_undef = 0; 8741 tp_features.second_fan = 0; 8742 fan_control_desired_level = 7; 8743 8744 if (tpacpi_is_ibm()) { 8745 TPACPI_ACPIHANDLE_INIT(fans); 8746 TPACPI_ACPIHANDLE_INIT(gfan); 8747 TPACPI_ACPIHANDLE_INIT(sfan); 8748 } 8749 8750 quirks = tpacpi_check_quirks(fan_quirk_table, 8751 ARRAY_SIZE(fan_quirk_table)); 8752 8753 if (gfan_handle) { 8754 /* 570, 600e/x, 770e, 770x */ 8755 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8756 } else { 8757 /* all other ThinkPads: note that even old-style 8758 * ThinkPad ECs supports the fan control register */ 8759 if (likely(acpi_ec_read(fan_status_offset, 8760 &fan_control_initial_status))) { 8761 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8762 if (quirks & TPACPI_FAN_Q1) 8763 fan_quirk1_setup(); 8764 if (quirks & TPACPI_FAN_2FAN) { 8765 tp_features.second_fan = 1; 8766 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8767 "secondary fan support enabled\n"); 8768 } 8769 } else { 8770 pr_err("ThinkPad ACPI EC access misbehaving, fan status and control unavailable\n"); 8771 return 1; 8772 } 8773 } 8774 8775 if (sfan_handle) { 8776 /* 570, 770x-JL */ 8777 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8778 fan_control_commands |= 8779 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8780 } else { 8781 if (!gfan_handle) { 8782 /* gfan without sfan means no fan control */ 8783 /* all other models implement TP EC 0x2f control */ 8784 8785 if (fans_handle) { 8786 /* X31, X40, X41 */ 8787 fan_control_access_mode = 8788 TPACPI_FAN_WR_ACPI_FANS; 8789 fan_control_commands |= 8790 TPACPI_FAN_CMD_SPEED | 8791 TPACPI_FAN_CMD_LEVEL | 8792 TPACPI_FAN_CMD_ENABLE; 8793 } else { 8794 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8795 fan_control_commands |= 8796 TPACPI_FAN_CMD_LEVEL | 8797 TPACPI_FAN_CMD_ENABLE; 8798 } 8799 } 8800 } 8801 8802 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8803 "fan is %s, modes %d, %d\n", 8804 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8805 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8806 fan_status_access_mode, fan_control_access_mode); 8807 8808 /* fan control master switch */ 8809 if (!fan_control_allowed) { 8810 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8811 fan_control_commands = 0; 8812 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8813 "fan control features disabled by parameter\n"); 8814 } 8815 8816 /* update fan_control_desired_level */ 8817 if (fan_status_access_mode != TPACPI_FAN_NONE) 8818 fan_get_status_safe(NULL); 8819 8820 if (fan_status_access_mode != TPACPI_FAN_NONE || 8821 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8822 if (tp_features.second_fan) { 8823 /* attach second fan tachometer */ 8824 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8825 &dev_attr_fan2_input.attr; 8826 } 8827 rc = sysfs_create_group(&tpacpi_hwmon->kobj, 8828 &fan_attr_group); 8829 if (rc < 0) 8830 return rc; 8831 8832 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8833 &driver_attr_fan_watchdog); 8834 if (rc < 0) { 8835 sysfs_remove_group(&tpacpi_hwmon->kobj, 8836 &fan_attr_group); 8837 return rc; 8838 } 8839 return 0; 8840 } else 8841 return 1; 8842 } 8843 8844 static void fan_exit(void) 8845 { 8846 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8847 "cancelling any pending fan watchdog tasks\n"); 8848 8849 /* FIXME: can we really do this unconditionally? */ 8850 sysfs_remove_group(&tpacpi_hwmon->kobj, &fan_attr_group); 8851 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8852 &driver_attr_fan_watchdog); 8853 8854 cancel_delayed_work(&fan_watchdog_task); 8855 flush_workqueue(tpacpi_wq); 8856 } 8857 8858 static void fan_suspend(void) 8859 { 8860 int rc; 8861 8862 if (!fan_control_allowed) 8863 return; 8864 8865 /* Store fan status in cache */ 8866 fan_control_resume_level = 0; 8867 rc = fan_get_status_safe(&fan_control_resume_level); 8868 if (rc < 0) 8869 pr_notice("failed to read fan level for later restore during resume: %d\n", 8870 rc); 8871 8872 /* if it is undefined, don't attempt to restore it. 8873 * KEEP THIS LAST */ 8874 if (tp_features.fan_ctrl_status_undef) 8875 fan_control_resume_level = 0; 8876 } 8877 8878 static void fan_resume(void) 8879 { 8880 u8 current_level = 7; 8881 bool do_set = false; 8882 int rc; 8883 8884 /* DSDT *always* updates status on resume */ 8885 tp_features.fan_ctrl_status_undef = 0; 8886 8887 if (!fan_control_allowed || 8888 !fan_control_resume_level || 8889 (fan_get_status_safe(¤t_level) < 0)) 8890 return; 8891 8892 switch (fan_control_access_mode) { 8893 case TPACPI_FAN_WR_ACPI_SFAN: 8894 /* never decrease fan level */ 8895 do_set = (fan_control_resume_level > current_level); 8896 break; 8897 case TPACPI_FAN_WR_ACPI_FANS: 8898 case TPACPI_FAN_WR_TPEC: 8899 /* never decrease fan level, scale is: 8900 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8901 * 8902 * We expect the firmware to set either 7 or AUTO, but we 8903 * handle FULLSPEED out of paranoia. 8904 * 8905 * So, we can safely only restore FULLSPEED or 7, anything 8906 * else could slow the fan. Restoring AUTO is useless, at 8907 * best that's exactly what the DSDT already set (it is the 8908 * slower it uses). 8909 * 8910 * Always keep in mind that the DSDT *will* have set the 8911 * fans to what the vendor supposes is the best level. We 8912 * muck with it only to speed the fan up. 8913 */ 8914 if (fan_control_resume_level != 7 && 8915 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8916 return; 8917 else 8918 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8919 (current_level != fan_control_resume_level); 8920 break; 8921 default: 8922 return; 8923 } 8924 if (do_set) { 8925 pr_notice("restoring fan level to 0x%02x\n", 8926 fan_control_resume_level); 8927 rc = fan_set_level_safe(fan_control_resume_level); 8928 if (rc < 0) 8929 pr_notice("failed to restore fan level: %d\n", rc); 8930 } 8931 } 8932 8933 static int fan_read(struct seq_file *m) 8934 { 8935 int rc; 8936 u8 status; 8937 unsigned int speed = 0; 8938 8939 switch (fan_status_access_mode) { 8940 case TPACPI_FAN_RD_ACPI_GFAN: 8941 /* 570, 600e/x, 770e, 770x */ 8942 rc = fan_get_status_safe(&status); 8943 if (rc < 0) 8944 return rc; 8945 8946 seq_printf(m, "status:\t\t%s\n" 8947 "level:\t\t%d\n", 8948 (status != 0) ? "enabled" : "disabled", status); 8949 break; 8950 8951 case TPACPI_FAN_RD_TPEC: 8952 /* all except 570, 600e/x, 770e, 770x */ 8953 rc = fan_get_status_safe(&status); 8954 if (rc < 0) 8955 return rc; 8956 8957 seq_printf(m, "status:\t\t%s\n", 8958 (status != 0) ? "enabled" : "disabled"); 8959 8960 rc = fan_get_speed(&speed); 8961 if (rc < 0) 8962 return rc; 8963 8964 seq_printf(m, "speed:\t\t%d\n", speed); 8965 8966 if (status & TP_EC_FAN_FULLSPEED) 8967 /* Disengaged mode takes precedence */ 8968 seq_printf(m, "level:\t\tdisengaged\n"); 8969 else if (status & TP_EC_FAN_AUTO) 8970 seq_printf(m, "level:\t\tauto\n"); 8971 else 8972 seq_printf(m, "level:\t\t%d\n", status); 8973 break; 8974 8975 case TPACPI_FAN_NONE: 8976 default: 8977 seq_printf(m, "status:\t\tnot supported\n"); 8978 } 8979 8980 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8981 seq_printf(m, "commands:\tlevel <level>"); 8982 8983 switch (fan_control_access_mode) { 8984 case TPACPI_FAN_WR_ACPI_SFAN: 8985 seq_printf(m, " (<level> is 0-7)\n"); 8986 break; 8987 8988 default: 8989 seq_printf(m, " (<level> is 0-7, auto, disengaged, full-speed)\n"); 8990 break; 8991 } 8992 } 8993 8994 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8995 seq_printf(m, "commands:\tenable, disable\n" 8996 "commands:\twatchdog <timeout> (<timeout> is 0 (off), 1-120 (seconds))\n"); 8997 8998 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8999 seq_printf(m, "commands:\tspeed <speed> (<speed> is 0-65535)\n"); 9000 9001 return 0; 9002 } 9003 9004 static int fan_write_cmd_level(const char *cmd, int *rc) 9005 { 9006 int level; 9007 9008 if (strlencmp(cmd, "level auto") == 0) 9009 level = TP_EC_FAN_AUTO; 9010 else if ((strlencmp(cmd, "level disengaged") == 0) | 9011 (strlencmp(cmd, "level full-speed") == 0)) 9012 level = TP_EC_FAN_FULLSPEED; 9013 else if (sscanf(cmd, "level %d", &level) != 1) 9014 return 0; 9015 9016 *rc = fan_set_level_safe(level); 9017 if (*rc == -ENXIO) 9018 pr_err("level command accepted for unsupported access mode %d\n", 9019 fan_control_access_mode); 9020 else if (!*rc) 9021 tpacpi_disclose_usertask("procfs fan", 9022 "set level to %d\n", level); 9023 9024 return 1; 9025 } 9026 9027 static int fan_write_cmd_enable(const char *cmd, int *rc) 9028 { 9029 if (strlencmp(cmd, "enable") != 0) 9030 return 0; 9031 9032 *rc = fan_set_enable(); 9033 if (*rc == -ENXIO) 9034 pr_err("enable command accepted for unsupported access mode %d\n", 9035 fan_control_access_mode); 9036 else if (!*rc) 9037 tpacpi_disclose_usertask("procfs fan", "enable\n"); 9038 9039 return 1; 9040 } 9041 9042 static int fan_write_cmd_disable(const char *cmd, int *rc) 9043 { 9044 if (strlencmp(cmd, "disable") != 0) 9045 return 0; 9046 9047 *rc = fan_set_disable(); 9048 if (*rc == -ENXIO) 9049 pr_err("disable command accepted for unsupported access mode %d\n", 9050 fan_control_access_mode); 9051 else if (!*rc) 9052 tpacpi_disclose_usertask("procfs fan", "disable\n"); 9053 9054 return 1; 9055 } 9056 9057 static int fan_write_cmd_speed(const char *cmd, int *rc) 9058 { 9059 int speed; 9060 9061 /* TODO: 9062 * Support speed <low> <medium> <high> ? */ 9063 9064 if (sscanf(cmd, "speed %d", &speed) != 1) 9065 return 0; 9066 9067 *rc = fan_set_speed(speed); 9068 if (*rc == -ENXIO) 9069 pr_err("speed command accepted for unsupported access mode %d\n", 9070 fan_control_access_mode); 9071 else if (!*rc) 9072 tpacpi_disclose_usertask("procfs fan", 9073 "set speed to %d\n", speed); 9074 9075 return 1; 9076 } 9077 9078 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 9079 { 9080 int interval; 9081 9082 if (sscanf(cmd, "watchdog %d", &interval) != 1) 9083 return 0; 9084 9085 if (interval < 0 || interval > 120) 9086 *rc = -EINVAL; 9087 else { 9088 fan_watchdog_maxinterval = interval; 9089 tpacpi_disclose_usertask("procfs fan", 9090 "set watchdog timer to %d\n", 9091 interval); 9092 } 9093 9094 return 1; 9095 } 9096 9097 static int fan_write(char *buf) 9098 { 9099 char *cmd; 9100 int rc = 0; 9101 9102 while (!rc && (cmd = next_cmd(&buf))) { 9103 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 9104 fan_write_cmd_level(cmd, &rc)) && 9105 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 9106 (fan_write_cmd_enable(cmd, &rc) || 9107 fan_write_cmd_disable(cmd, &rc) || 9108 fan_write_cmd_watchdog(cmd, &rc))) && 9109 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 9110 fan_write_cmd_speed(cmd, &rc)) 9111 ) 9112 rc = -EINVAL; 9113 else if (!rc) 9114 fan_watchdog_reset(); 9115 } 9116 9117 return rc; 9118 } 9119 9120 static struct ibm_struct fan_driver_data = { 9121 .name = "fan", 9122 .read = fan_read, 9123 .write = fan_write, 9124 .exit = fan_exit, 9125 .suspend = fan_suspend, 9126 .resume = fan_resume, 9127 }; 9128 9129 /************************************************************************* 9130 * Mute LED subdriver 9131 */ 9132 9133 #define TPACPI_LED_MAX 2 9134 9135 struct tp_led_table { 9136 acpi_string name; 9137 int on_value; 9138 int off_value; 9139 int state; 9140 }; 9141 9142 static struct tp_led_table led_tables[TPACPI_LED_MAX] = { 9143 [LED_AUDIO_MUTE] = { 9144 .name = "SSMS", 9145 .on_value = 1, 9146 .off_value = 0, 9147 }, 9148 [LED_AUDIO_MICMUTE] = { 9149 .name = "MMTS", 9150 .on_value = 2, 9151 .off_value = 0, 9152 }, 9153 }; 9154 9155 static int mute_led_on_off(struct tp_led_table *t, bool state) 9156 { 9157 acpi_handle temp; 9158 int output; 9159 9160 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9161 pr_warn("Thinkpad ACPI has no %s interface.\n", t->name); 9162 return -EIO; 9163 } 9164 9165 if (!acpi_evalf(hkey_handle, &output, t->name, "dd", 9166 state ? t->on_value : t->off_value)) 9167 return -EIO; 9168 9169 t->state = state; 9170 return state; 9171 } 9172 9173 static int tpacpi_led_set(int whichled, bool on) 9174 { 9175 struct tp_led_table *t; 9176 9177 t = &led_tables[whichled]; 9178 if (t->state < 0 || t->state == on) 9179 return t->state; 9180 return mute_led_on_off(t, on); 9181 } 9182 9183 static int tpacpi_led_mute_set(struct led_classdev *led_cdev, 9184 enum led_brightness brightness) 9185 { 9186 return tpacpi_led_set(LED_AUDIO_MUTE, brightness != LED_OFF); 9187 } 9188 9189 static int tpacpi_led_micmute_set(struct led_classdev *led_cdev, 9190 enum led_brightness brightness) 9191 { 9192 return tpacpi_led_set(LED_AUDIO_MICMUTE, brightness != LED_OFF); 9193 } 9194 9195 static struct led_classdev mute_led_cdev[TPACPI_LED_MAX] = { 9196 [LED_AUDIO_MUTE] = { 9197 .name = "platform::mute", 9198 .max_brightness = 1, 9199 .brightness_set_blocking = tpacpi_led_mute_set, 9200 .default_trigger = "audio-mute", 9201 }, 9202 [LED_AUDIO_MICMUTE] = { 9203 .name = "platform::micmute", 9204 .max_brightness = 1, 9205 .brightness_set_blocking = tpacpi_led_micmute_set, 9206 .default_trigger = "audio-micmute", 9207 }, 9208 }; 9209 9210 static int mute_led_init(struct ibm_init_struct *iibm) 9211 { 9212 acpi_handle temp; 9213 int i, err; 9214 9215 for (i = 0; i < TPACPI_LED_MAX; i++) { 9216 struct tp_led_table *t = &led_tables[i]; 9217 if (ACPI_FAILURE(acpi_get_handle(hkey_handle, t->name, &temp))) { 9218 t->state = -ENODEV; 9219 continue; 9220 } 9221 9222 mute_led_cdev[i].brightness = ledtrig_audio_get(i); 9223 err = led_classdev_register(&tpacpi_pdev->dev, &mute_led_cdev[i]); 9224 if (err < 0) { 9225 while (i--) { 9226 if (led_tables[i].state >= 0) 9227 led_classdev_unregister(&mute_led_cdev[i]); 9228 } 9229 return err; 9230 } 9231 } 9232 return 0; 9233 } 9234 9235 static void mute_led_exit(void) 9236 { 9237 int i; 9238 9239 for (i = 0; i < TPACPI_LED_MAX; i++) { 9240 if (led_tables[i].state >= 0) { 9241 led_classdev_unregister(&mute_led_cdev[i]); 9242 tpacpi_led_set(i, false); 9243 } 9244 } 9245 } 9246 9247 static void mute_led_resume(void) 9248 { 9249 int i; 9250 9251 for (i = 0; i < TPACPI_LED_MAX; i++) { 9252 struct tp_led_table *t = &led_tables[i]; 9253 if (t->state >= 0) 9254 mute_led_on_off(t, t->state); 9255 } 9256 } 9257 9258 static struct ibm_struct mute_led_driver_data = { 9259 .name = "mute_led", 9260 .exit = mute_led_exit, 9261 .resume = mute_led_resume, 9262 }; 9263 9264 /* 9265 * Battery Wear Control Driver 9266 * Contact: Ognjen Galic <smclt30p@gmail.com> 9267 */ 9268 9269 /* Metadata */ 9270 9271 #define GET_START "BCTG" 9272 #define SET_START "BCCS" 9273 #define GET_STOP "BCSG" 9274 #define SET_STOP "BCSS" 9275 9276 #define START_ATTR "charge_start_threshold" 9277 #define STOP_ATTR "charge_stop_threshold" 9278 9279 enum { 9280 BAT_ANY = 0, 9281 BAT_PRIMARY = 1, 9282 BAT_SECONDARY = 2 9283 }; 9284 9285 enum { 9286 /* Error condition bit */ 9287 METHOD_ERR = BIT(31), 9288 }; 9289 9290 enum { 9291 /* This is used in the get/set helpers */ 9292 THRESHOLD_START, 9293 THRESHOLD_STOP, 9294 }; 9295 9296 struct tpacpi_battery_data { 9297 int charge_start; 9298 int start_support; 9299 int charge_stop; 9300 int stop_support; 9301 }; 9302 9303 struct tpacpi_battery_driver_data { 9304 struct tpacpi_battery_data batteries[3]; 9305 int individual_addressing; 9306 }; 9307 9308 static struct tpacpi_battery_driver_data battery_info; 9309 9310 /* ACPI helpers/functions/probes */ 9311 9312 /** 9313 * This evaluates a ACPI method call specific to the battery 9314 * ACPI extension. The specifics are that an error is marked 9315 * in the 32rd bit of the response, so we just check that here. 9316 */ 9317 static acpi_status tpacpi_battery_acpi_eval(char *method, int *ret, int param) 9318 { 9319 int response; 9320 9321 if (!acpi_evalf(hkey_handle, &response, method, "dd", param)) { 9322 acpi_handle_err(hkey_handle, "%s: evaluate failed", method); 9323 return AE_ERROR; 9324 } 9325 if (response & METHOD_ERR) { 9326 acpi_handle_err(hkey_handle, 9327 "%s evaluated but flagged as error", method); 9328 return AE_ERROR; 9329 } 9330 *ret = response; 9331 return AE_OK; 9332 } 9333 9334 static int tpacpi_battery_get(int what, int battery, int *ret) 9335 { 9336 switch (what) { 9337 case THRESHOLD_START: 9338 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, ret, battery)) 9339 return -ENODEV; 9340 9341 /* The value is in the low 8 bits of the response */ 9342 *ret = *ret & 0xFF; 9343 return 0; 9344 case THRESHOLD_STOP: 9345 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, ret, battery)) 9346 return -ENODEV; 9347 /* Value is in lower 8 bits */ 9348 *ret = *ret & 0xFF; 9349 /* 9350 * On the stop value, if we return 0 that 9351 * does not make any sense. 0 means Default, which 9352 * means that charging stops at 100%, so we return 9353 * that. 9354 */ 9355 if (*ret == 0) 9356 *ret = 100; 9357 return 0; 9358 default: 9359 pr_crit("wrong parameter: %d", what); 9360 return -EINVAL; 9361 } 9362 } 9363 9364 static int tpacpi_battery_set(int what, int battery, int value) 9365 { 9366 int param, ret; 9367 /* The first 8 bits are the value of the threshold */ 9368 param = value; 9369 /* The battery ID is in bits 8-9, 2 bits */ 9370 param |= battery << 8; 9371 9372 switch (what) { 9373 case THRESHOLD_START: 9374 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_START, &ret, param)) { 9375 pr_err("failed to set charge threshold on battery %d", 9376 battery); 9377 return -ENODEV; 9378 } 9379 return 0; 9380 case THRESHOLD_STOP: 9381 if ACPI_FAILURE(tpacpi_battery_acpi_eval(SET_STOP, &ret, param)) { 9382 pr_err("failed to set stop threshold: %d", battery); 9383 return -ENODEV; 9384 } 9385 return 0; 9386 default: 9387 pr_crit("wrong parameter: %d", what); 9388 return -EINVAL; 9389 } 9390 } 9391 9392 static int tpacpi_battery_probe(int battery) 9393 { 9394 int ret = 0; 9395 9396 memset(&battery_info.batteries[battery], 0, 9397 sizeof(battery_info.batteries[battery])); 9398 9399 /* 9400 * 1) Get the current start threshold 9401 * 2) Check for support 9402 * 3) Get the current stop threshold 9403 * 4) Check for support 9404 */ 9405 if (acpi_has_method(hkey_handle, GET_START)) { 9406 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_START, &ret, battery)) { 9407 pr_err("Error probing battery %d\n", battery); 9408 return -ENODEV; 9409 } 9410 /* Individual addressing is in bit 9 */ 9411 if (ret & BIT(9)) 9412 battery_info.individual_addressing = true; 9413 /* Support is marked in bit 8 */ 9414 if (ret & BIT(8)) 9415 battery_info.batteries[battery].start_support = 1; 9416 else 9417 return -ENODEV; 9418 if (tpacpi_battery_get(THRESHOLD_START, battery, 9419 &battery_info.batteries[battery].charge_start)) { 9420 pr_err("Error probing battery %d\n", battery); 9421 return -ENODEV; 9422 } 9423 } 9424 if (acpi_has_method(hkey_handle, GET_STOP)) { 9425 if ACPI_FAILURE(tpacpi_battery_acpi_eval(GET_STOP, &ret, battery)) { 9426 pr_err("Error probing battery stop; %d\n", battery); 9427 return -ENODEV; 9428 } 9429 /* Support is marked in bit 8 */ 9430 if (ret & BIT(8)) 9431 battery_info.batteries[battery].stop_support = 1; 9432 else 9433 return -ENODEV; 9434 if (tpacpi_battery_get(THRESHOLD_STOP, battery, 9435 &battery_info.batteries[battery].charge_stop)) { 9436 pr_err("Error probing battery stop: %d\n", battery); 9437 return -ENODEV; 9438 } 9439 } 9440 pr_info("battery %d registered (start %d, stop %d)", 9441 battery, 9442 battery_info.batteries[battery].charge_start, 9443 battery_info.batteries[battery].charge_stop); 9444 9445 return 0; 9446 } 9447 9448 /* General helper functions */ 9449 9450 static int tpacpi_battery_get_id(const char *battery_name) 9451 { 9452 9453 if (strcmp(battery_name, "BAT0") == 0 || 9454 tp_features.battery_force_primary) 9455 return BAT_PRIMARY; 9456 if (strcmp(battery_name, "BAT1") == 0) 9457 return BAT_SECONDARY; 9458 /* 9459 * If for some reason the battery is not BAT0 nor is it 9460 * BAT1, we will assume it's the default, first battery, 9461 * AKA primary. 9462 */ 9463 pr_warn("unknown battery %s, assuming primary", battery_name); 9464 return BAT_PRIMARY; 9465 } 9466 9467 /* sysfs interface */ 9468 9469 static ssize_t tpacpi_battery_store(int what, 9470 struct device *dev, 9471 const char *buf, size_t count) 9472 { 9473 struct power_supply *supply = to_power_supply(dev); 9474 unsigned long value; 9475 int battery, rval; 9476 /* 9477 * Some systems have support for more than 9478 * one battery. If that is the case, 9479 * tpacpi_battery_probe marked that addressing 9480 * them individually is supported, so we do that 9481 * based on the device struct. 9482 * 9483 * On systems that are not supported, we assume 9484 * the primary as most of the ACPI calls fail 9485 * with "Any Battery" as the parameter. 9486 */ 9487 if (battery_info.individual_addressing) 9488 /* BAT_PRIMARY or BAT_SECONDARY */ 9489 battery = tpacpi_battery_get_id(supply->desc->name); 9490 else 9491 battery = BAT_PRIMARY; 9492 9493 rval = kstrtoul(buf, 10, &value); 9494 if (rval) 9495 return rval; 9496 9497 switch (what) { 9498 case THRESHOLD_START: 9499 if (!battery_info.batteries[battery].start_support) 9500 return -ENODEV; 9501 /* valid values are [0, 99] */ 9502 if (value < 0 || value > 99) 9503 return -EINVAL; 9504 if (value > battery_info.batteries[battery].charge_stop) 9505 return -EINVAL; 9506 if (tpacpi_battery_set(THRESHOLD_START, battery, value)) 9507 return -ENODEV; 9508 battery_info.batteries[battery].charge_start = value; 9509 return count; 9510 9511 case THRESHOLD_STOP: 9512 if (!battery_info.batteries[battery].stop_support) 9513 return -ENODEV; 9514 /* valid values are [1, 100] */ 9515 if (value < 1 || value > 100) 9516 return -EINVAL; 9517 if (value < battery_info.batteries[battery].charge_start) 9518 return -EINVAL; 9519 battery_info.batteries[battery].charge_stop = value; 9520 /* 9521 * When 100 is passed to stop, we need to flip 9522 * it to 0 as that the EC understands that as 9523 * "Default", which will charge to 100% 9524 */ 9525 if (value == 100) 9526 value = 0; 9527 if (tpacpi_battery_set(THRESHOLD_STOP, battery, value)) 9528 return -EINVAL; 9529 return count; 9530 default: 9531 pr_crit("Wrong parameter: %d", what); 9532 return -EINVAL; 9533 } 9534 return count; 9535 } 9536 9537 static ssize_t tpacpi_battery_show(int what, 9538 struct device *dev, 9539 char *buf) 9540 { 9541 struct power_supply *supply = to_power_supply(dev); 9542 int ret, battery; 9543 /* 9544 * Some systems have support for more than 9545 * one battery. If that is the case, 9546 * tpacpi_battery_probe marked that addressing 9547 * them individually is supported, so we; 9548 * based on the device struct. 9549 * 9550 * On systems that are not supported, we assume 9551 * the primary as most of the ACPI calls fail 9552 * with "Any Battery" as the parameter. 9553 */ 9554 if (battery_info.individual_addressing) 9555 /* BAT_PRIMARY or BAT_SECONDARY */ 9556 battery = tpacpi_battery_get_id(supply->desc->name); 9557 else 9558 battery = BAT_PRIMARY; 9559 if (tpacpi_battery_get(what, battery, &ret)) 9560 return -ENODEV; 9561 return sprintf(buf, "%d\n", ret); 9562 } 9563 9564 static ssize_t charge_start_threshold_show(struct device *device, 9565 struct device_attribute *attr, 9566 char *buf) 9567 { 9568 return tpacpi_battery_show(THRESHOLD_START, device, buf); 9569 } 9570 9571 static ssize_t charge_stop_threshold_show(struct device *device, 9572 struct device_attribute *attr, 9573 char *buf) 9574 { 9575 return tpacpi_battery_show(THRESHOLD_STOP, device, buf); 9576 } 9577 9578 static ssize_t charge_start_threshold_store(struct device *dev, 9579 struct device_attribute *attr, 9580 const char *buf, size_t count) 9581 { 9582 return tpacpi_battery_store(THRESHOLD_START, dev, buf, count); 9583 } 9584 9585 static ssize_t charge_stop_threshold_store(struct device *dev, 9586 struct device_attribute *attr, 9587 const char *buf, size_t count) 9588 { 9589 return tpacpi_battery_store(THRESHOLD_STOP, dev, buf, count); 9590 } 9591 9592 static DEVICE_ATTR_RW(charge_start_threshold); 9593 static DEVICE_ATTR_RW(charge_stop_threshold); 9594 9595 static struct attribute *tpacpi_battery_attrs[] = { 9596 &dev_attr_charge_start_threshold.attr, 9597 &dev_attr_charge_stop_threshold.attr, 9598 NULL, 9599 }; 9600 9601 ATTRIBUTE_GROUPS(tpacpi_battery); 9602 9603 /* ACPI battery hooking */ 9604 9605 static int tpacpi_battery_add(struct power_supply *battery) 9606 { 9607 int batteryid = tpacpi_battery_get_id(battery->desc->name); 9608 9609 if (tpacpi_battery_probe(batteryid)) 9610 return -ENODEV; 9611 if (device_add_groups(&battery->dev, tpacpi_battery_groups)) 9612 return -ENODEV; 9613 return 0; 9614 } 9615 9616 static int tpacpi_battery_remove(struct power_supply *battery) 9617 { 9618 device_remove_groups(&battery->dev, tpacpi_battery_groups); 9619 return 0; 9620 } 9621 9622 static struct acpi_battery_hook battery_hook = { 9623 .add_battery = tpacpi_battery_add, 9624 .remove_battery = tpacpi_battery_remove, 9625 .name = "ThinkPad Battery Extension", 9626 }; 9627 9628 /* Subdriver init/exit */ 9629 9630 static const struct tpacpi_quirk battery_quirk_table[] __initconst = { 9631 /* 9632 * Individual addressing is broken on models that expose the 9633 * primary battery as BAT1. 9634 */ 9635 TPACPI_Q_LNV('J', '7', true), /* B5400 */ 9636 TPACPI_Q_LNV('J', 'I', true), /* Thinkpad 11e */ 9637 TPACPI_Q_LNV3('R', '0', 'B', true), /* Thinkpad 11e gen 3 */ 9638 TPACPI_Q_LNV3('R', '0', 'C', true), /* Thinkpad 13 */ 9639 TPACPI_Q_LNV3('R', '0', 'J', true), /* Thinkpad 13 gen 2 */ 9640 }; 9641 9642 static int __init tpacpi_battery_init(struct ibm_init_struct *ibm) 9643 { 9644 memset(&battery_info, 0, sizeof(battery_info)); 9645 9646 tp_features.battery_force_primary = tpacpi_check_quirks( 9647 battery_quirk_table, 9648 ARRAY_SIZE(battery_quirk_table)); 9649 9650 battery_hook_register(&battery_hook); 9651 return 0; 9652 } 9653 9654 static void tpacpi_battery_exit(void) 9655 { 9656 battery_hook_unregister(&battery_hook); 9657 } 9658 9659 static struct ibm_struct battery_driver_data = { 9660 .name = "battery", 9661 .exit = tpacpi_battery_exit, 9662 }; 9663 9664 /**************************************************************************** 9665 **************************************************************************** 9666 * 9667 * Infrastructure 9668 * 9669 **************************************************************************** 9670 ****************************************************************************/ 9671 9672 /* 9673 * HKEY event callout for other subdrivers go here 9674 * (yes, it is ugly, but it is quick, safe, and gets the job done 9675 */ 9676 static void tpacpi_driver_event(const unsigned int hkey_event) 9677 { 9678 if (ibm_backlight_device) { 9679 switch (hkey_event) { 9680 case TP_HKEY_EV_BRGHT_UP: 9681 case TP_HKEY_EV_BRGHT_DOWN: 9682 tpacpi_brightness_notify_change(); 9683 } 9684 } 9685 if (alsa_card) { 9686 switch (hkey_event) { 9687 case TP_HKEY_EV_VOL_UP: 9688 case TP_HKEY_EV_VOL_DOWN: 9689 case TP_HKEY_EV_VOL_MUTE: 9690 volume_alsa_notify_change(); 9691 } 9692 } 9693 if (tp_features.kbdlight && hkey_event == TP_HKEY_EV_KBD_LIGHT) { 9694 enum led_brightness brightness; 9695 9696 mutex_lock(&kbdlight_mutex); 9697 9698 /* 9699 * Check the brightness actually changed, setting the brightness 9700 * through kbdlight_set_level() also triggers this event. 9701 */ 9702 brightness = kbdlight_sysfs_get(NULL); 9703 if (kbdlight_brightness != brightness) { 9704 kbdlight_brightness = brightness; 9705 led_classdev_notify_brightness_hw_changed( 9706 &tpacpi_led_kbdlight.led_classdev, brightness); 9707 } 9708 9709 mutex_unlock(&kbdlight_mutex); 9710 } 9711 } 9712 9713 static void hotkey_driver_event(const unsigned int scancode) 9714 { 9715 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 9716 } 9717 9718 /* --------------------------------------------------------------------- */ 9719 9720 /* /proc support */ 9721 static struct proc_dir_entry *proc_dir; 9722 9723 /* 9724 * Module and infrastructure proble, init and exit handling 9725 */ 9726 9727 static bool force_load; 9728 9729 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 9730 static const char * __init str_supported(int is_supported) 9731 { 9732 static char text_unsupported[] __initdata = "not supported"; 9733 9734 return (is_supported) ? &text_unsupported[4] : &text_unsupported[0]; 9735 } 9736 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 9737 9738 static void ibm_exit(struct ibm_struct *ibm) 9739 { 9740 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 9741 9742 list_del_init(&ibm->all_drivers); 9743 9744 if (ibm->flags.acpi_notify_installed) { 9745 dbg_printk(TPACPI_DBG_EXIT, 9746 "%s: acpi_remove_notify_handler\n", ibm->name); 9747 BUG_ON(!ibm->acpi); 9748 acpi_remove_notify_handler(*ibm->acpi->handle, 9749 ibm->acpi->type, 9750 dispatch_acpi_notify); 9751 ibm->flags.acpi_notify_installed = 0; 9752 } 9753 9754 if (ibm->flags.proc_created) { 9755 dbg_printk(TPACPI_DBG_EXIT, 9756 "%s: remove_proc_entry\n", ibm->name); 9757 remove_proc_entry(ibm->name, proc_dir); 9758 ibm->flags.proc_created = 0; 9759 } 9760 9761 if (ibm->flags.acpi_driver_registered) { 9762 dbg_printk(TPACPI_DBG_EXIT, 9763 "%s: acpi_bus_unregister_driver\n", ibm->name); 9764 BUG_ON(!ibm->acpi); 9765 acpi_bus_unregister_driver(ibm->acpi->driver); 9766 kfree(ibm->acpi->driver); 9767 ibm->acpi->driver = NULL; 9768 ibm->flags.acpi_driver_registered = 0; 9769 } 9770 9771 if (ibm->flags.init_called && ibm->exit) { 9772 ibm->exit(); 9773 ibm->flags.init_called = 0; 9774 } 9775 9776 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 9777 } 9778 9779 static int __init ibm_init(struct ibm_init_struct *iibm) 9780 { 9781 int ret; 9782 struct ibm_struct *ibm = iibm->data; 9783 struct proc_dir_entry *entry; 9784 9785 BUG_ON(ibm == NULL); 9786 9787 INIT_LIST_HEAD(&ibm->all_drivers); 9788 9789 if (ibm->flags.experimental && !experimental) 9790 return 0; 9791 9792 dbg_printk(TPACPI_DBG_INIT, 9793 "probing for %s\n", ibm->name); 9794 9795 if (iibm->init) { 9796 ret = iibm->init(iibm); 9797 if (ret > 0) 9798 return 0; /* probe failed */ 9799 if (ret) 9800 return ret; 9801 9802 ibm->flags.init_called = 1; 9803 } 9804 9805 if (ibm->acpi) { 9806 if (ibm->acpi->hid) { 9807 ret = register_tpacpi_subdriver(ibm); 9808 if (ret) 9809 goto err_out; 9810 } 9811 9812 if (ibm->acpi->notify) { 9813 ret = setup_acpi_notify(ibm); 9814 if (ret == -ENODEV) { 9815 pr_notice("disabling subdriver %s\n", 9816 ibm->name); 9817 ret = 0; 9818 goto err_out; 9819 } 9820 if (ret < 0) 9821 goto err_out; 9822 } 9823 } 9824 9825 dbg_printk(TPACPI_DBG_INIT, 9826 "%s installed\n", ibm->name); 9827 9828 if (ibm->read) { 9829 umode_t mode = iibm->base_procfs_mode; 9830 9831 if (!mode) 9832 mode = S_IRUGO; 9833 if (ibm->write) 9834 mode |= S_IWUSR; 9835 entry = proc_create_data(ibm->name, mode, proc_dir, 9836 &dispatch_proc_fops, ibm); 9837 if (!entry) { 9838 pr_err("unable to create proc entry %s\n", ibm->name); 9839 ret = -ENODEV; 9840 goto err_out; 9841 } 9842 ibm->flags.proc_created = 1; 9843 } 9844 9845 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 9846 9847 return 0; 9848 9849 err_out: 9850 dbg_printk(TPACPI_DBG_INIT, 9851 "%s: at error exit path with result %d\n", 9852 ibm->name, ret); 9853 9854 ibm_exit(ibm); 9855 return (ret < 0) ? ret : 0; 9856 } 9857 9858 /* Probing */ 9859 9860 static char __init tpacpi_parse_fw_id(const char * const s, 9861 u32 *model, u16 *release) 9862 { 9863 int i; 9864 9865 if (!s || strlen(s) < 8) 9866 goto invalid; 9867 9868 for (i = 0; i < 8; i++) 9869 if (!((s[i] >= '0' && s[i] <= '9') || 9870 (s[i] >= 'A' && s[i] <= 'Z'))) 9871 goto invalid; 9872 9873 /* 9874 * Most models: xxyTkkWW (#.##c) 9875 * Ancient 570/600 and -SL lacks (#.##c) 9876 */ 9877 if (s[3] == 'T' || s[3] == 'N') { 9878 *model = TPID(s[0], s[1]); 9879 *release = TPVER(s[4], s[5]); 9880 return s[2]; 9881 9882 /* New models: xxxyTkkW (#.##c); T550 and some others */ 9883 } else if (s[4] == 'T' || s[4] == 'N') { 9884 *model = TPID3(s[0], s[1], s[2]); 9885 *release = TPVER(s[5], s[6]); 9886 return s[3]; 9887 } 9888 9889 invalid: 9890 return '\0'; 9891 } 9892 9893 /* returns 0 - probe ok, or < 0 - probe error. 9894 * Probe ok doesn't mean thinkpad found. 9895 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 9896 static int __must_check __init get_thinkpad_model_data( 9897 struct thinkpad_id_data *tp) 9898 { 9899 const struct dmi_device *dev = NULL; 9900 char ec_fw_string[18]; 9901 char const *s; 9902 char t; 9903 9904 if (!tp) 9905 return -EINVAL; 9906 9907 memset(tp, 0, sizeof(*tp)); 9908 9909 if (dmi_name_in_vendors("IBM")) 9910 tp->vendor = PCI_VENDOR_ID_IBM; 9911 else if (dmi_name_in_vendors("LENOVO")) 9912 tp->vendor = PCI_VENDOR_ID_LENOVO; 9913 else 9914 return 0; 9915 9916 s = dmi_get_system_info(DMI_BIOS_VERSION); 9917 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 9918 if (s && !tp->bios_version_str) 9919 return -ENOMEM; 9920 9921 /* Really ancient ThinkPad 240X will fail this, which is fine */ 9922 t = tpacpi_parse_fw_id(tp->bios_version_str, 9923 &tp->bios_model, &tp->bios_release); 9924 if (t != 'E' && t != 'C') 9925 return 0; 9926 9927 /* 9928 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 9929 * X32 or newer, all Z series; Some models must have an 9930 * up-to-date BIOS or they will not be detected. 9931 * 9932 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9933 */ 9934 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 9935 if (sscanf(dev->name, 9936 "IBM ThinkPad Embedded Controller -[%17c", 9937 ec_fw_string) == 1) { 9938 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 9939 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 9940 9941 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 9942 if (!tp->ec_version_str) 9943 return -ENOMEM; 9944 9945 t = tpacpi_parse_fw_id(ec_fw_string, 9946 &tp->ec_model, &tp->ec_release); 9947 if (t != 'H') { 9948 pr_notice("ThinkPad firmware release %s doesn't match the known patterns\n", 9949 ec_fw_string); 9950 pr_notice("please report this to %s\n", 9951 TPACPI_MAIL); 9952 } 9953 break; 9954 } 9955 } 9956 9957 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 9958 if (s && !(strncasecmp(s, "ThinkPad", 8) && strncasecmp(s, "Lenovo", 6))) { 9959 tp->model_str = kstrdup(s, GFP_KERNEL); 9960 if (!tp->model_str) 9961 return -ENOMEM; 9962 } else { 9963 s = dmi_get_system_info(DMI_BIOS_VENDOR); 9964 if (s && !(strncasecmp(s, "Lenovo", 6))) { 9965 tp->model_str = kstrdup(s, GFP_KERNEL); 9966 if (!tp->model_str) 9967 return -ENOMEM; 9968 } 9969 } 9970 9971 s = dmi_get_system_info(DMI_PRODUCT_NAME); 9972 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 9973 if (s && !tp->nummodel_str) 9974 return -ENOMEM; 9975 9976 return 0; 9977 } 9978 9979 static int __init probe_for_thinkpad(void) 9980 { 9981 int is_thinkpad; 9982 9983 if (acpi_disabled) 9984 return -ENODEV; 9985 9986 /* It would be dangerous to run the driver in this case */ 9987 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 9988 return -ENODEV; 9989 9990 /* 9991 * Non-ancient models have better DMI tagging, but very old models 9992 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 9993 */ 9994 is_thinkpad = (thinkpad_id.model_str != NULL) || 9995 (thinkpad_id.ec_model != 0) || 9996 tpacpi_is_fw_known(); 9997 9998 /* The EC handler is required */ 9999 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 10000 if (!ec_handle) { 10001 if (is_thinkpad) 10002 pr_err("Not yet supported ThinkPad detected!\n"); 10003 return -ENODEV; 10004 } 10005 10006 if (!is_thinkpad && !force_load) 10007 return -ENODEV; 10008 10009 return 0; 10010 } 10011 10012 static void __init thinkpad_acpi_init_banner(void) 10013 { 10014 pr_info("%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 10015 pr_info("%s\n", TPACPI_URL); 10016 10017 pr_info("ThinkPad BIOS %s, EC %s\n", 10018 (thinkpad_id.bios_version_str) ? 10019 thinkpad_id.bios_version_str : "unknown", 10020 (thinkpad_id.ec_version_str) ? 10021 thinkpad_id.ec_version_str : "unknown"); 10022 10023 BUG_ON(!thinkpad_id.vendor); 10024 10025 if (thinkpad_id.model_str) 10026 pr_info("%s %s, model %s\n", 10027 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 10028 "IBM" : ((thinkpad_id.vendor == 10029 PCI_VENDOR_ID_LENOVO) ? 10030 "Lenovo" : "Unknown vendor"), 10031 thinkpad_id.model_str, 10032 (thinkpad_id.nummodel_str) ? 10033 thinkpad_id.nummodel_str : "unknown"); 10034 } 10035 10036 /* Module init, exit, parameters */ 10037 10038 static struct ibm_init_struct ibms_init[] __initdata = { 10039 { 10040 .data = &thinkpad_acpi_driver_data, 10041 }, 10042 { 10043 .init = hotkey_init, 10044 .data = &hotkey_driver_data, 10045 }, 10046 { 10047 .init = bluetooth_init, 10048 .data = &bluetooth_driver_data, 10049 }, 10050 { 10051 .init = wan_init, 10052 .data = &wan_driver_data, 10053 }, 10054 { 10055 .init = uwb_init, 10056 .data = &uwb_driver_data, 10057 }, 10058 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 10059 { 10060 .init = video_init, 10061 .base_procfs_mode = S_IRUSR, 10062 .data = &video_driver_data, 10063 }, 10064 #endif 10065 { 10066 .init = kbdlight_init, 10067 .data = &kbdlight_driver_data, 10068 }, 10069 { 10070 .init = light_init, 10071 .data = &light_driver_data, 10072 }, 10073 { 10074 .init = cmos_init, 10075 .data = &cmos_driver_data, 10076 }, 10077 { 10078 .init = led_init, 10079 .data = &led_driver_data, 10080 }, 10081 { 10082 .init = beep_init, 10083 .data = &beep_driver_data, 10084 }, 10085 { 10086 .init = thermal_init, 10087 .data = &thermal_driver_data, 10088 }, 10089 { 10090 .init = brightness_init, 10091 .data = &brightness_driver_data, 10092 }, 10093 { 10094 .init = volume_init, 10095 .data = &volume_driver_data, 10096 }, 10097 { 10098 .init = fan_init, 10099 .data = &fan_driver_data, 10100 }, 10101 { 10102 .init = mute_led_init, 10103 .data = &mute_led_driver_data, 10104 }, 10105 { 10106 .init = tpacpi_battery_init, 10107 .data = &battery_driver_data, 10108 }, 10109 }; 10110 10111 static int __init set_ibm_param(const char *val, const struct kernel_param *kp) 10112 { 10113 unsigned int i; 10114 struct ibm_struct *ibm; 10115 10116 if (!kp || !kp->name || !val) 10117 return -EINVAL; 10118 10119 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10120 ibm = ibms_init[i].data; 10121 WARN_ON(ibm == NULL); 10122 10123 if (!ibm || !ibm->name) 10124 continue; 10125 10126 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 10127 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 10128 return -ENOSPC; 10129 strcpy(ibms_init[i].param, val); 10130 strcat(ibms_init[i].param, ","); 10131 return 0; 10132 } 10133 } 10134 10135 return -EINVAL; 10136 } 10137 10138 module_param(experimental, int, 0444); 10139 MODULE_PARM_DESC(experimental, 10140 "Enables experimental features when non-zero"); 10141 10142 module_param_named(debug, dbg_level, uint, 0); 10143 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 10144 10145 module_param(force_load, bool, 0444); 10146 MODULE_PARM_DESC(force_load, 10147 "Attempts to load the driver even on a mis-identified ThinkPad when true"); 10148 10149 module_param_named(fan_control, fan_control_allowed, bool, 0444); 10150 MODULE_PARM_DESC(fan_control, 10151 "Enables setting fan parameters features when true"); 10152 10153 module_param_named(brightness_mode, brightness_mode, uint, 0444); 10154 MODULE_PARM_DESC(brightness_mode, 10155 "Selects brightness control strategy: 0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 10156 10157 module_param(brightness_enable, uint, 0444); 10158 MODULE_PARM_DESC(brightness_enable, 10159 "Enables backlight control when 1, disables when 0"); 10160 10161 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 10162 module_param_named(volume_mode, volume_mode, uint, 0444); 10163 MODULE_PARM_DESC(volume_mode, 10164 "Selects volume control strategy: 0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 10165 10166 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 10167 MODULE_PARM_DESC(volume_capabilities, 10168 "Selects the mixer capabilites: 0=auto, 1=volume and mute, 2=mute only"); 10169 10170 module_param_named(volume_control, volume_control_allowed, bool, 0444); 10171 MODULE_PARM_DESC(volume_control, 10172 "Enables software override for the console audio control when true"); 10173 10174 module_param_named(software_mute, software_mute_requested, bool, 0444); 10175 MODULE_PARM_DESC(software_mute, 10176 "Request full software mute control"); 10177 10178 /* ALSA module API parameters */ 10179 module_param_named(index, alsa_index, int, 0444); 10180 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 10181 module_param_named(id, alsa_id, charp, 0444); 10182 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 10183 module_param_named(enable, alsa_enable, bool, 0444); 10184 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 10185 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 10186 10187 /* The module parameter can't be read back, that's why 0 is used here */ 10188 #define TPACPI_PARAM(feature) \ 10189 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 10190 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command at module load, see documentation") 10191 10192 TPACPI_PARAM(hotkey); 10193 TPACPI_PARAM(bluetooth); 10194 TPACPI_PARAM(video); 10195 TPACPI_PARAM(light); 10196 TPACPI_PARAM(cmos); 10197 TPACPI_PARAM(led); 10198 TPACPI_PARAM(beep); 10199 TPACPI_PARAM(brightness); 10200 TPACPI_PARAM(volume); 10201 TPACPI_PARAM(fan); 10202 10203 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 10204 module_param(dbg_wlswemul, uint, 0444); 10205 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 10206 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 10207 MODULE_PARM_DESC(wlsw_state, 10208 "Initial state of the emulated WLSW switch"); 10209 10210 module_param(dbg_bluetoothemul, uint, 0444); 10211 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 10212 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 10213 MODULE_PARM_DESC(bluetooth_state, 10214 "Initial state of the emulated bluetooth switch"); 10215 10216 module_param(dbg_wwanemul, uint, 0444); 10217 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 10218 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 10219 MODULE_PARM_DESC(wwan_state, 10220 "Initial state of the emulated WWAN switch"); 10221 10222 module_param(dbg_uwbemul, uint, 0444); 10223 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 10224 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 10225 MODULE_PARM_DESC(uwb_state, 10226 "Initial state of the emulated UWB switch"); 10227 #endif 10228 10229 static void thinkpad_acpi_module_exit(void) 10230 { 10231 struct ibm_struct *ibm, *itmp; 10232 10233 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 10234 10235 list_for_each_entry_safe_reverse(ibm, itmp, 10236 &tpacpi_all_drivers, 10237 all_drivers) { 10238 ibm_exit(ibm); 10239 } 10240 10241 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 10242 10243 if (tpacpi_inputdev) { 10244 if (tp_features.input_device_registered) 10245 input_unregister_device(tpacpi_inputdev); 10246 else 10247 input_free_device(tpacpi_inputdev); 10248 kfree(hotkey_keycode_map); 10249 } 10250 10251 if (tpacpi_hwmon) 10252 hwmon_device_unregister(tpacpi_hwmon); 10253 10254 if (tpacpi_sensors_pdev) 10255 platform_device_unregister(tpacpi_sensors_pdev); 10256 if (tpacpi_pdev) 10257 platform_device_unregister(tpacpi_pdev); 10258 10259 if (tp_features.sensors_pdrv_attrs_registered) 10260 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 10261 if (tp_features.platform_drv_attrs_registered) 10262 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 10263 10264 if (tp_features.sensors_pdrv_registered) 10265 platform_driver_unregister(&tpacpi_hwmon_pdriver); 10266 10267 if (tp_features.platform_drv_registered) 10268 platform_driver_unregister(&tpacpi_pdriver); 10269 10270 if (proc_dir) 10271 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 10272 10273 if (tpacpi_wq) 10274 destroy_workqueue(tpacpi_wq); 10275 10276 kfree(thinkpad_id.bios_version_str); 10277 kfree(thinkpad_id.ec_version_str); 10278 kfree(thinkpad_id.model_str); 10279 kfree(thinkpad_id.nummodel_str); 10280 } 10281 10282 10283 static int __init thinkpad_acpi_module_init(void) 10284 { 10285 int ret, i; 10286 10287 tpacpi_lifecycle = TPACPI_LIFE_INIT; 10288 10289 /* Driver-level probe */ 10290 10291 ret = get_thinkpad_model_data(&thinkpad_id); 10292 if (ret) { 10293 pr_err("unable to get DMI data: %d\n", ret); 10294 thinkpad_acpi_module_exit(); 10295 return ret; 10296 } 10297 ret = probe_for_thinkpad(); 10298 if (ret) { 10299 thinkpad_acpi_module_exit(); 10300 return ret; 10301 } 10302 10303 /* Driver initialization */ 10304 10305 thinkpad_acpi_init_banner(); 10306 tpacpi_check_outdated_fw(); 10307 10308 TPACPI_ACPIHANDLE_INIT(ecrd); 10309 TPACPI_ACPIHANDLE_INIT(ecwr); 10310 10311 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 10312 if (!tpacpi_wq) { 10313 thinkpad_acpi_module_exit(); 10314 return -ENOMEM; 10315 } 10316 10317 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 10318 if (!proc_dir) { 10319 pr_err("unable to create proc dir " TPACPI_PROC_DIR "\n"); 10320 thinkpad_acpi_module_exit(); 10321 return -ENODEV; 10322 } 10323 10324 ret = platform_driver_register(&tpacpi_pdriver); 10325 if (ret) { 10326 pr_err("unable to register main platform driver\n"); 10327 thinkpad_acpi_module_exit(); 10328 return ret; 10329 } 10330 tp_features.platform_drv_registered = 1; 10331 10332 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 10333 if (ret) { 10334 pr_err("unable to register hwmon platform driver\n"); 10335 thinkpad_acpi_module_exit(); 10336 return ret; 10337 } 10338 tp_features.sensors_pdrv_registered = 1; 10339 10340 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 10341 if (!ret) { 10342 tp_features.platform_drv_attrs_registered = 1; 10343 ret = tpacpi_create_driver_attributes( 10344 &tpacpi_hwmon_pdriver.driver); 10345 } 10346 if (ret) { 10347 pr_err("unable to create sysfs driver attributes\n"); 10348 thinkpad_acpi_module_exit(); 10349 return ret; 10350 } 10351 tp_features.sensors_pdrv_attrs_registered = 1; 10352 10353 10354 /* Device initialization */ 10355 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 10356 NULL, 0); 10357 if (IS_ERR(tpacpi_pdev)) { 10358 ret = PTR_ERR(tpacpi_pdev); 10359 tpacpi_pdev = NULL; 10360 pr_err("unable to register platform device\n"); 10361 thinkpad_acpi_module_exit(); 10362 return ret; 10363 } 10364 tpacpi_sensors_pdev = platform_device_register_simple( 10365 TPACPI_HWMON_DRVR_NAME, 10366 -1, NULL, 0); 10367 if (IS_ERR(tpacpi_sensors_pdev)) { 10368 ret = PTR_ERR(tpacpi_sensors_pdev); 10369 tpacpi_sensors_pdev = NULL; 10370 pr_err("unable to register hwmon platform device\n"); 10371 thinkpad_acpi_module_exit(); 10372 return ret; 10373 } 10374 tp_features.sensors_pdev_attrs_registered = 1; 10375 tpacpi_hwmon = hwmon_device_register_with_groups( 10376 &tpacpi_sensors_pdev->dev, TPACPI_NAME, NULL, NULL); 10377 10378 if (IS_ERR(tpacpi_hwmon)) { 10379 ret = PTR_ERR(tpacpi_hwmon); 10380 tpacpi_hwmon = NULL; 10381 pr_err("unable to register hwmon device\n"); 10382 thinkpad_acpi_module_exit(); 10383 return ret; 10384 } 10385 mutex_init(&tpacpi_inputdev_send_mutex); 10386 tpacpi_inputdev = input_allocate_device(); 10387 if (!tpacpi_inputdev) { 10388 thinkpad_acpi_module_exit(); 10389 return -ENOMEM; 10390 } else { 10391 /* Prepare input device, but don't register */ 10392 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 10393 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 10394 tpacpi_inputdev->id.bustype = BUS_HOST; 10395 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 10396 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 10397 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 10398 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 10399 } 10400 10401 /* Init subdriver dependencies */ 10402 tpacpi_detect_brightness_capabilities(); 10403 10404 /* Init subdrivers */ 10405 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 10406 ret = ibm_init(&ibms_init[i]); 10407 if (ret >= 0 && *ibms_init[i].param) 10408 ret = ibms_init[i].data->write(ibms_init[i].param); 10409 if (ret < 0) { 10410 thinkpad_acpi_module_exit(); 10411 return ret; 10412 } 10413 } 10414 10415 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 10416 10417 ret = input_register_device(tpacpi_inputdev); 10418 if (ret < 0) { 10419 pr_err("unable to register input device\n"); 10420 thinkpad_acpi_module_exit(); 10421 return ret; 10422 } else { 10423 tp_features.input_device_registered = 1; 10424 } 10425 10426 return 0; 10427 } 10428 10429 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 10430 10431 /* 10432 * This will autoload the driver in almost every ThinkPad 10433 * in widespread use. 10434 * 10435 * Only _VERY_ old models, like the 240, 240x and 570 lack 10436 * the HKEY event interface. 10437 */ 10438 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 10439 10440 /* 10441 * DMI matching for module autoloading 10442 * 10443 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 10444 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 10445 * 10446 * Only models listed in thinkwiki will be supported, so add yours 10447 * if it is not there yet. 10448 */ 10449 #define IBM_BIOS_MODULE_ALIAS(__type) \ 10450 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 10451 10452 /* Ancient thinkpad BIOSes have to be identified by 10453 * BIOS type or model number, and there are far less 10454 * BIOS types than model numbers... */ 10455 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 10456 10457 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 10458 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 10459 MODULE_DESCRIPTION(TPACPI_DESC); 10460 MODULE_VERSION(TPACPI_VERSION); 10461 MODULE_LICENSE("GPL"); 10462 10463 module_init(thinkpad_acpi_module_init); 10464 module_exit(thinkpad_acpi_module_exit); 10465