1 /* 2 * thinkpad_acpi.c - ThinkPad ACPI Extras 3 * 4 * 5 * Copyright (C) 2004-2005 Borislav Deianov <borislav@users.sf.net> 6 * Copyright (C) 2006-2009 Henrique de Moraes Holschuh <hmh@hmh.eng.br> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 21 * 02110-1301, USA. 22 */ 23 24 #define TPACPI_VERSION "0.24" 25 #define TPACPI_SYSFS_VERSION 0x020700 26 27 /* 28 * Changelog: 29 * 2007-10-20 changelog trimmed down 30 * 31 * 2007-03-27 0.14 renamed to thinkpad_acpi and moved to 32 * drivers/misc. 33 * 34 * 2006-11-22 0.13 new maintainer 35 * changelog now lives in git commit history, and will 36 * not be updated further in-file. 37 * 38 * 2005-03-17 0.11 support for 600e, 770x 39 * thanks to Jamie Lentin <lentinj@dial.pipex.com> 40 * 41 * 2005-01-16 0.9 use MODULE_VERSION 42 * thanks to Henrik Brix Andersen <brix@gentoo.org> 43 * fix parameter passing on module loading 44 * thanks to Rusty Russell <rusty@rustcorp.com.au> 45 * thanks to Jim Radford <radford@blackbean.org> 46 * 2004-11-08 0.8 fix init error case, don't return from a macro 47 * thanks to Chris Wright <chrisw@osdl.org> 48 */ 49 50 #include <linux/kernel.h> 51 #include <linux/module.h> 52 #include <linux/init.h> 53 #include <linux/types.h> 54 #include <linux/string.h> 55 #include <linux/list.h> 56 #include <linux/mutex.h> 57 #include <linux/sched.h> 58 #include <linux/kthread.h> 59 #include <linux/freezer.h> 60 #include <linux/delay.h> 61 #include <linux/slab.h> 62 63 #include <linux/nvram.h> 64 #include <linux/proc_fs.h> 65 #include <linux/seq_file.h> 66 #include <linux/sysfs.h> 67 #include <linux/backlight.h> 68 #include <linux/fb.h> 69 #include <linux/platform_device.h> 70 #include <linux/hwmon.h> 71 #include <linux/hwmon-sysfs.h> 72 #include <linux/input.h> 73 #include <linux/leds.h> 74 #include <linux/rfkill.h> 75 #include <asm/uaccess.h> 76 77 #include <linux/dmi.h> 78 #include <linux/jiffies.h> 79 #include <linux/workqueue.h> 80 81 #include <sound/core.h> 82 #include <sound/control.h> 83 #include <sound/initval.h> 84 85 #include <acpi/acpi_drivers.h> 86 87 #include <linux/pci_ids.h> 88 89 90 /* ThinkPad CMOS commands */ 91 #define TP_CMOS_VOLUME_DOWN 0 92 #define TP_CMOS_VOLUME_UP 1 93 #define TP_CMOS_VOLUME_MUTE 2 94 #define TP_CMOS_BRIGHTNESS_UP 4 95 #define TP_CMOS_BRIGHTNESS_DOWN 5 96 #define TP_CMOS_THINKLIGHT_ON 12 97 #define TP_CMOS_THINKLIGHT_OFF 13 98 99 /* NVRAM Addresses */ 100 enum tp_nvram_addr { 101 TP_NVRAM_ADDR_HK2 = 0x57, 102 TP_NVRAM_ADDR_THINKLIGHT = 0x58, 103 TP_NVRAM_ADDR_VIDEO = 0x59, 104 TP_NVRAM_ADDR_BRIGHTNESS = 0x5e, 105 TP_NVRAM_ADDR_MIXER = 0x60, 106 }; 107 108 /* NVRAM bit masks */ 109 enum { 110 TP_NVRAM_MASK_HKT_THINKPAD = 0x08, 111 TP_NVRAM_MASK_HKT_ZOOM = 0x20, 112 TP_NVRAM_MASK_HKT_DISPLAY = 0x40, 113 TP_NVRAM_MASK_HKT_HIBERNATE = 0x80, 114 TP_NVRAM_MASK_THINKLIGHT = 0x10, 115 TP_NVRAM_MASK_HKT_DISPEXPND = 0x30, 116 TP_NVRAM_MASK_HKT_BRIGHTNESS = 0x20, 117 TP_NVRAM_MASK_LEVEL_BRIGHTNESS = 0x0f, 118 TP_NVRAM_POS_LEVEL_BRIGHTNESS = 0, 119 TP_NVRAM_MASK_MUTE = 0x40, 120 TP_NVRAM_MASK_HKT_VOLUME = 0x80, 121 TP_NVRAM_MASK_LEVEL_VOLUME = 0x0f, 122 TP_NVRAM_POS_LEVEL_VOLUME = 0, 123 }; 124 125 /* Misc NVRAM-related */ 126 enum { 127 TP_NVRAM_LEVEL_VOLUME_MAX = 14, 128 }; 129 130 /* ACPI HIDs */ 131 #define TPACPI_ACPI_HKEY_HID "IBM0068" 132 #define TPACPI_ACPI_EC_HID "PNP0C09" 133 134 /* Input IDs */ 135 #define TPACPI_HKEY_INPUT_PRODUCT 0x5054 /* "TP" */ 136 #define TPACPI_HKEY_INPUT_VERSION 0x4101 137 138 /* ACPI \WGSV commands */ 139 enum { 140 TP_ACPI_WGSV_GET_STATE = 0x01, /* Get state information */ 141 TP_ACPI_WGSV_PWR_ON_ON_RESUME = 0x02, /* Resume WWAN powered on */ 142 TP_ACPI_WGSV_PWR_OFF_ON_RESUME = 0x03, /* Resume WWAN powered off */ 143 TP_ACPI_WGSV_SAVE_STATE = 0x04, /* Save state for S4/S5 */ 144 }; 145 146 /* TP_ACPI_WGSV_GET_STATE bits */ 147 enum { 148 TP_ACPI_WGSV_STATE_WWANEXIST = 0x0001, /* WWAN hw available */ 149 TP_ACPI_WGSV_STATE_WWANPWR = 0x0002, /* WWAN radio enabled */ 150 TP_ACPI_WGSV_STATE_WWANPWRRES = 0x0004, /* WWAN state at resume */ 151 TP_ACPI_WGSV_STATE_WWANBIOSOFF = 0x0008, /* WWAN disabled in BIOS */ 152 TP_ACPI_WGSV_STATE_BLTHEXIST = 0x0001, /* BLTH hw available */ 153 TP_ACPI_WGSV_STATE_BLTHPWR = 0x0002, /* BLTH radio enabled */ 154 TP_ACPI_WGSV_STATE_BLTHPWRRES = 0x0004, /* BLTH state at resume */ 155 TP_ACPI_WGSV_STATE_BLTHBIOSOFF = 0x0008, /* BLTH disabled in BIOS */ 156 TP_ACPI_WGSV_STATE_UWBEXIST = 0x0010, /* UWB hw available */ 157 TP_ACPI_WGSV_STATE_UWBPWR = 0x0020, /* UWB radio enabled */ 158 }; 159 160 /* HKEY events */ 161 enum tpacpi_hkey_event_t { 162 /* Hotkey-related */ 163 TP_HKEY_EV_HOTKEY_BASE = 0x1001, /* first hotkey (FN+F1) */ 164 TP_HKEY_EV_BRGHT_UP = 0x1010, /* Brightness up */ 165 TP_HKEY_EV_BRGHT_DOWN = 0x1011, /* Brightness down */ 166 TP_HKEY_EV_VOL_UP = 0x1015, /* Volume up or unmute */ 167 TP_HKEY_EV_VOL_DOWN = 0x1016, /* Volume down or unmute */ 168 TP_HKEY_EV_VOL_MUTE = 0x1017, /* Mixer output mute */ 169 170 /* Reasons for waking up from S3/S4 */ 171 TP_HKEY_EV_WKUP_S3_UNDOCK = 0x2304, /* undock requested, S3 */ 172 TP_HKEY_EV_WKUP_S4_UNDOCK = 0x2404, /* undock requested, S4 */ 173 TP_HKEY_EV_WKUP_S3_BAYEJ = 0x2305, /* bay ejection req, S3 */ 174 TP_HKEY_EV_WKUP_S4_BAYEJ = 0x2405, /* bay ejection req, S4 */ 175 TP_HKEY_EV_WKUP_S3_BATLOW = 0x2313, /* battery empty, S3 */ 176 TP_HKEY_EV_WKUP_S4_BATLOW = 0x2413, /* battery empty, S4 */ 177 178 /* Auto-sleep after eject request */ 179 TP_HKEY_EV_BAYEJ_ACK = 0x3003, /* bay ejection complete */ 180 TP_HKEY_EV_UNDOCK_ACK = 0x4003, /* undock complete */ 181 182 /* Misc bay events */ 183 TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */ 184 185 /* User-interface events */ 186 TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */ 187 TP_HKEY_EV_LID_OPEN = 0x5002, /* laptop lid opened */ 188 TP_HKEY_EV_TABLET_TABLET = 0x5009, /* tablet swivel up */ 189 TP_HKEY_EV_TABLET_NOTEBOOK = 0x500a, /* tablet swivel down */ 190 TP_HKEY_EV_PEN_INSERTED = 0x500b, /* tablet pen inserted */ 191 TP_HKEY_EV_PEN_REMOVED = 0x500c, /* tablet pen removed */ 192 TP_HKEY_EV_BRGHT_CHANGED = 0x5010, /* backlight control event */ 193 194 /* Thermal events */ 195 TP_HKEY_EV_ALARM_BAT_HOT = 0x6011, /* battery too hot */ 196 TP_HKEY_EV_ALARM_BAT_XHOT = 0x6012, /* battery critically hot */ 197 TP_HKEY_EV_ALARM_SENSOR_HOT = 0x6021, /* sensor too hot */ 198 TP_HKEY_EV_ALARM_SENSOR_XHOT = 0x6022, /* sensor critically hot */ 199 TP_HKEY_EV_THM_TABLE_CHANGED = 0x6030, /* thermal table changed */ 200 201 /* Misc */ 202 TP_HKEY_EV_RFKILL_CHANGED = 0x7000, /* rfkill switch changed */ 203 }; 204 205 /**************************************************************************** 206 * Main driver 207 */ 208 209 #define TPACPI_NAME "thinkpad" 210 #define TPACPI_DESC "ThinkPad ACPI Extras" 211 #define TPACPI_FILE TPACPI_NAME "_acpi" 212 #define TPACPI_URL "http://ibm-acpi.sf.net/" 213 #define TPACPI_MAIL "ibm-acpi-devel@lists.sourceforge.net" 214 215 #define TPACPI_PROC_DIR "ibm" 216 #define TPACPI_ACPI_EVENT_PREFIX "ibm" 217 #define TPACPI_DRVR_NAME TPACPI_FILE 218 #define TPACPI_DRVR_SHORTNAME "tpacpi" 219 #define TPACPI_HWMON_DRVR_NAME TPACPI_NAME "_hwmon" 220 221 #define TPACPI_NVRAM_KTHREAD_NAME "ktpacpi_nvramd" 222 #define TPACPI_WORKQUEUE_NAME "ktpacpid" 223 224 #define TPACPI_MAX_ACPI_ARGS 3 225 226 /* printk headers */ 227 #define TPACPI_LOG TPACPI_FILE ": " 228 #define TPACPI_EMERG KERN_EMERG TPACPI_LOG 229 #define TPACPI_ALERT KERN_ALERT TPACPI_LOG 230 #define TPACPI_CRIT KERN_CRIT TPACPI_LOG 231 #define TPACPI_ERR KERN_ERR TPACPI_LOG 232 #define TPACPI_WARN KERN_WARNING TPACPI_LOG 233 #define TPACPI_NOTICE KERN_NOTICE TPACPI_LOG 234 #define TPACPI_INFO KERN_INFO TPACPI_LOG 235 #define TPACPI_DEBUG KERN_DEBUG TPACPI_LOG 236 237 /* Debugging printk groups */ 238 #define TPACPI_DBG_ALL 0xffff 239 #define TPACPI_DBG_DISCLOSETASK 0x8000 240 #define TPACPI_DBG_INIT 0x0001 241 #define TPACPI_DBG_EXIT 0x0002 242 #define TPACPI_DBG_RFKILL 0x0004 243 #define TPACPI_DBG_HKEY 0x0008 244 #define TPACPI_DBG_FAN 0x0010 245 #define TPACPI_DBG_BRGHT 0x0020 246 #define TPACPI_DBG_MIXER 0x0040 247 248 #define onoff(status, bit) ((status) & (1 << (bit)) ? "on" : "off") 249 #define enabled(status, bit) ((status) & (1 << (bit)) ? "enabled" : "disabled") 250 #define strlencmp(a, b) (strncmp((a), (b), strlen(b))) 251 252 253 /**************************************************************************** 254 * Driver-wide structs and misc. variables 255 */ 256 257 struct ibm_struct; 258 259 struct tp_acpi_drv_struct { 260 const struct acpi_device_id *hid; 261 struct acpi_driver *driver; 262 263 void (*notify) (struct ibm_struct *, u32); 264 acpi_handle *handle; 265 u32 type; 266 struct acpi_device *device; 267 }; 268 269 struct ibm_struct { 270 char *name; 271 272 int (*read) (struct seq_file *); 273 int (*write) (char *); 274 void (*exit) (void); 275 void (*resume) (void); 276 void (*suspend) (pm_message_t state); 277 void (*shutdown) (void); 278 279 struct list_head all_drivers; 280 281 struct tp_acpi_drv_struct *acpi; 282 283 struct { 284 u8 acpi_driver_registered:1; 285 u8 acpi_notify_installed:1; 286 u8 proc_created:1; 287 u8 init_called:1; 288 u8 experimental:1; 289 } flags; 290 }; 291 292 struct ibm_init_struct { 293 char param[32]; 294 295 int (*init) (struct ibm_init_struct *); 296 mode_t base_procfs_mode; 297 struct ibm_struct *data; 298 }; 299 300 static struct { 301 u32 bluetooth:1; 302 u32 hotkey:1; 303 u32 hotkey_mask:1; 304 u32 hotkey_wlsw:1; 305 u32 hotkey_tablet:1; 306 u32 light:1; 307 u32 light_status:1; 308 u32 bright_acpimode:1; 309 u32 bright_unkfw:1; 310 u32 wan:1; 311 u32 uwb:1; 312 u32 fan_ctrl_status_undef:1; 313 u32 second_fan:1; 314 u32 beep_needs_two_args:1; 315 u32 mixer_no_level_control:1; 316 u32 input_device_registered:1; 317 u32 platform_drv_registered:1; 318 u32 platform_drv_attrs_registered:1; 319 u32 sensors_pdrv_registered:1; 320 u32 sensors_pdrv_attrs_registered:1; 321 u32 sensors_pdev_attrs_registered:1; 322 u32 hotkey_poll_active:1; 323 } tp_features; 324 325 static struct { 326 u16 hotkey_mask_ff:1; 327 u16 volume_ctrl_forbidden:1; 328 } tp_warned; 329 330 struct thinkpad_id_data { 331 unsigned int vendor; /* ThinkPad vendor: 332 * PCI_VENDOR_ID_IBM/PCI_VENDOR_ID_LENOVO */ 333 334 char *bios_version_str; /* Something like 1ZET51WW (1.03z) */ 335 char *ec_version_str; /* Something like 1ZHT51WW-1.04a */ 336 337 u16 bios_model; /* 1Y = 0x5931, 0 = unknown */ 338 u16 ec_model; 339 u16 bios_release; /* 1ZETK1WW = 0x314b, 0 = unknown */ 340 u16 ec_release; 341 342 char *model_str; /* ThinkPad T43 */ 343 char *nummodel_str; /* 9384A9C for a 9384-A9C model */ 344 }; 345 static struct thinkpad_id_data thinkpad_id; 346 347 static enum { 348 TPACPI_LIFE_INIT = 0, 349 TPACPI_LIFE_RUNNING, 350 TPACPI_LIFE_EXITING, 351 } tpacpi_lifecycle; 352 353 static int experimental; 354 static u32 dbg_level; 355 356 static struct workqueue_struct *tpacpi_wq; 357 358 enum led_status_t { 359 TPACPI_LED_OFF = 0, 360 TPACPI_LED_ON, 361 TPACPI_LED_BLINK, 362 }; 363 364 /* Special LED class that can defer work */ 365 struct tpacpi_led_classdev { 366 struct led_classdev led_classdev; 367 struct work_struct work; 368 enum led_status_t new_state; 369 unsigned int led; 370 }; 371 372 /* brightness level capabilities */ 373 static unsigned int bright_maxlvl; /* 0 = unknown */ 374 375 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 376 static int dbg_wlswemul; 377 static int tpacpi_wlsw_emulstate; 378 static int dbg_bluetoothemul; 379 static int tpacpi_bluetooth_emulstate; 380 static int dbg_wwanemul; 381 static int tpacpi_wwan_emulstate; 382 static int dbg_uwbemul; 383 static int tpacpi_uwb_emulstate; 384 #endif 385 386 387 /************************************************************************* 388 * Debugging helpers 389 */ 390 391 #define dbg_printk(a_dbg_level, format, arg...) \ 392 do { if (dbg_level & (a_dbg_level)) \ 393 printk(TPACPI_DEBUG "%s: " format, __func__ , ## arg); \ 394 } while (0) 395 396 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 397 #define vdbg_printk dbg_printk 398 static const char *str_supported(int is_supported); 399 #else 400 #define vdbg_printk(a_dbg_level, format, arg...) \ 401 do { } while (0) 402 #endif 403 404 static void tpacpi_log_usertask(const char * const what) 405 { 406 printk(TPACPI_DEBUG "%s: access by process with PID %d\n", 407 what, task_tgid_vnr(current)); 408 } 409 410 #define tpacpi_disclose_usertask(what, format, arg...) \ 411 do { \ 412 if (unlikely( \ 413 (dbg_level & TPACPI_DBG_DISCLOSETASK) && \ 414 (tpacpi_lifecycle == TPACPI_LIFE_RUNNING))) { \ 415 printk(TPACPI_DEBUG "%s: PID %d: " format, \ 416 what, task_tgid_vnr(current), ## arg); \ 417 } \ 418 } while (0) 419 420 /* 421 * Quirk handling helpers 422 * 423 * ThinkPad IDs and versions seen in the field so far 424 * are two-characters from the set [0-9A-Z], i.e. base 36. 425 * 426 * We use values well outside that range as specials. 427 */ 428 429 #define TPACPI_MATCH_ANY 0xffffU 430 #define TPACPI_MATCH_UNKNOWN 0U 431 432 /* TPID('1', 'Y') == 0x5931 */ 433 #define TPID(__c1, __c2) (((__c2) << 8) | (__c1)) 434 435 #define TPACPI_Q_IBM(__id1, __id2, __quirk) \ 436 { .vendor = PCI_VENDOR_ID_IBM, \ 437 .bios = TPID(__id1, __id2), \ 438 .ec = TPACPI_MATCH_ANY, \ 439 .quirks = (__quirk) } 440 441 #define TPACPI_Q_LNV(__id1, __id2, __quirk) \ 442 { .vendor = PCI_VENDOR_ID_LENOVO, \ 443 .bios = TPID(__id1, __id2), \ 444 .ec = TPACPI_MATCH_ANY, \ 445 .quirks = (__quirk) } 446 447 #define TPACPI_QEC_LNV(__id1, __id2, __quirk) \ 448 { .vendor = PCI_VENDOR_ID_LENOVO, \ 449 .bios = TPACPI_MATCH_ANY, \ 450 .ec = TPID(__id1, __id2), \ 451 .quirks = (__quirk) } 452 453 struct tpacpi_quirk { 454 unsigned int vendor; 455 u16 bios; 456 u16 ec; 457 unsigned long quirks; 458 }; 459 460 /** 461 * tpacpi_check_quirks() - search BIOS/EC version on a list 462 * @qlist: array of &struct tpacpi_quirk 463 * @qlist_size: number of elements in @qlist 464 * 465 * Iterates over a quirks list until one is found that matches the 466 * ThinkPad's vendor, BIOS and EC model. 467 * 468 * Returns 0 if nothing matches, otherwise returns the quirks field of 469 * the matching &struct tpacpi_quirk entry. 470 * 471 * The match criteria is: vendor, ec and bios much match. 472 */ 473 static unsigned long __init tpacpi_check_quirks( 474 const struct tpacpi_quirk *qlist, 475 unsigned int qlist_size) 476 { 477 while (qlist_size) { 478 if ((qlist->vendor == thinkpad_id.vendor || 479 qlist->vendor == TPACPI_MATCH_ANY) && 480 (qlist->bios == thinkpad_id.bios_model || 481 qlist->bios == TPACPI_MATCH_ANY) && 482 (qlist->ec == thinkpad_id.ec_model || 483 qlist->ec == TPACPI_MATCH_ANY)) 484 return qlist->quirks; 485 486 qlist_size--; 487 qlist++; 488 } 489 return 0; 490 } 491 492 static inline bool __pure __init tpacpi_is_lenovo(void) 493 { 494 return thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO; 495 } 496 497 static inline bool __pure __init tpacpi_is_ibm(void) 498 { 499 return thinkpad_id.vendor == PCI_VENDOR_ID_IBM; 500 } 501 502 /**************************************************************************** 503 **************************************************************************** 504 * 505 * ACPI Helpers and device model 506 * 507 **************************************************************************** 508 ****************************************************************************/ 509 510 /************************************************************************* 511 * ACPI basic handles 512 */ 513 514 static acpi_handle root_handle; 515 static acpi_handle ec_handle; 516 517 #define TPACPI_HANDLE(object, parent, paths...) \ 518 static acpi_handle object##_handle; \ 519 static const acpi_handle *object##_parent __initdata = \ 520 &parent##_handle; \ 521 static char *object##_paths[] __initdata = { paths } 522 523 TPACPI_HANDLE(ecrd, ec, "ECRD"); /* 570 */ 524 TPACPI_HANDLE(ecwr, ec, "ECWR"); /* 570 */ 525 526 TPACPI_HANDLE(cmos, root, "\\UCMS", /* R50, R50e, R50p, R51, */ 527 /* T4x, X31, X40 */ 528 "\\CMOS", /* A3x, G4x, R32, T23, T30, X22-24, X30 */ 529 "\\CMS", /* R40, R40e */ 530 ); /* all others */ 531 532 TPACPI_HANDLE(hkey, ec, "\\_SB.HKEY", /* 600e/x, 770e, 770x */ 533 "^HKEY", /* R30, R31 */ 534 "HKEY", /* all others */ 535 ); /* 570 */ 536 537 TPACPI_HANDLE(vid, root, "\\_SB.PCI.AGP.VGA", /* 570 */ 538 "\\_SB.PCI0.AGP0.VID0", /* 600e/x, 770x */ 539 "\\_SB.PCI0.VID0", /* 770e */ 540 "\\_SB.PCI0.VID", /* A21e, G4x, R50e, X30, X40 */ 541 "\\_SB.PCI0.AGP.VGA", /* X100e and a few others */ 542 "\\_SB.PCI0.AGP.VID", /* all others */ 543 ); /* R30, R31 */ 544 545 546 /************************************************************************* 547 * ACPI helpers 548 */ 549 550 static int acpi_evalf(acpi_handle handle, 551 void *res, char *method, char *fmt, ...) 552 { 553 char *fmt0 = fmt; 554 struct acpi_object_list params; 555 union acpi_object in_objs[TPACPI_MAX_ACPI_ARGS]; 556 struct acpi_buffer result, *resultp; 557 union acpi_object out_obj; 558 acpi_status status; 559 va_list ap; 560 char res_type; 561 int success; 562 int quiet; 563 564 if (!*fmt) { 565 printk(TPACPI_ERR "acpi_evalf() called with empty format\n"); 566 return 0; 567 } 568 569 if (*fmt == 'q') { 570 quiet = 1; 571 fmt++; 572 } else 573 quiet = 0; 574 575 res_type = *(fmt++); 576 577 params.count = 0; 578 params.pointer = &in_objs[0]; 579 580 va_start(ap, fmt); 581 while (*fmt) { 582 char c = *(fmt++); 583 switch (c) { 584 case 'd': /* int */ 585 in_objs[params.count].integer.value = va_arg(ap, int); 586 in_objs[params.count++].type = ACPI_TYPE_INTEGER; 587 break; 588 /* add more types as needed */ 589 default: 590 printk(TPACPI_ERR "acpi_evalf() called " 591 "with invalid format character '%c'\n", c); 592 va_end(ap); 593 return 0; 594 } 595 } 596 va_end(ap); 597 598 if (res_type != 'v') { 599 result.length = sizeof(out_obj); 600 result.pointer = &out_obj; 601 resultp = &result; 602 } else 603 resultp = NULL; 604 605 status = acpi_evaluate_object(handle, method, ¶ms, resultp); 606 607 switch (res_type) { 608 case 'd': /* int */ 609 success = (status == AE_OK && 610 out_obj.type == ACPI_TYPE_INTEGER); 611 if (success && res) 612 *(int *)res = out_obj.integer.value; 613 break; 614 case 'v': /* void */ 615 success = status == AE_OK; 616 break; 617 /* add more types as needed */ 618 default: 619 printk(TPACPI_ERR "acpi_evalf() called " 620 "with invalid format character '%c'\n", res_type); 621 return 0; 622 } 623 624 if (!success && !quiet) 625 printk(TPACPI_ERR "acpi_evalf(%s, %s, ...) failed: %s\n", 626 method, fmt0, acpi_format_exception(status)); 627 628 return success; 629 } 630 631 static int acpi_ec_read(int i, u8 *p) 632 { 633 int v; 634 635 if (ecrd_handle) { 636 if (!acpi_evalf(ecrd_handle, &v, NULL, "dd", i)) 637 return 0; 638 *p = v; 639 } else { 640 if (ec_read(i, p) < 0) 641 return 0; 642 } 643 644 return 1; 645 } 646 647 static int acpi_ec_write(int i, u8 v) 648 { 649 if (ecwr_handle) { 650 if (!acpi_evalf(ecwr_handle, NULL, NULL, "vdd", i, v)) 651 return 0; 652 } else { 653 if (ec_write(i, v) < 0) 654 return 0; 655 } 656 657 return 1; 658 } 659 660 static int issue_thinkpad_cmos_command(int cmos_cmd) 661 { 662 if (!cmos_handle) 663 return -ENXIO; 664 665 if (!acpi_evalf(cmos_handle, NULL, NULL, "vd", cmos_cmd)) 666 return -EIO; 667 668 return 0; 669 } 670 671 /************************************************************************* 672 * ACPI device model 673 */ 674 675 #define TPACPI_ACPIHANDLE_INIT(object) \ 676 drv_acpi_handle_init(#object, &object##_handle, *object##_parent, \ 677 object##_paths, ARRAY_SIZE(object##_paths)) 678 679 static void __init drv_acpi_handle_init(const char *name, 680 acpi_handle *handle, const acpi_handle parent, 681 char **paths, const int num_paths) 682 { 683 int i; 684 acpi_status status; 685 686 vdbg_printk(TPACPI_DBG_INIT, "trying to locate ACPI handle for %s\n", 687 name); 688 689 for (i = 0; i < num_paths; i++) { 690 status = acpi_get_handle(parent, paths[i], handle); 691 if (ACPI_SUCCESS(status)) { 692 dbg_printk(TPACPI_DBG_INIT, 693 "Found ACPI handle %s for %s\n", 694 paths[i], name); 695 return; 696 } 697 } 698 699 vdbg_printk(TPACPI_DBG_INIT, "ACPI handle for %s not found\n", 700 name); 701 *handle = NULL; 702 } 703 704 static acpi_status __init tpacpi_acpi_handle_locate_callback(acpi_handle handle, 705 u32 level, void *context, void **return_value) 706 { 707 *(acpi_handle *)return_value = handle; 708 709 return AE_CTRL_TERMINATE; 710 } 711 712 static void __init tpacpi_acpi_handle_locate(const char *name, 713 const char *hid, 714 acpi_handle *handle) 715 { 716 acpi_status status; 717 acpi_handle device_found; 718 719 BUG_ON(!name || !hid || !handle); 720 vdbg_printk(TPACPI_DBG_INIT, 721 "trying to locate ACPI handle for %s, using HID %s\n", 722 name, hid); 723 724 memset(&device_found, 0, sizeof(device_found)); 725 status = acpi_get_devices(hid, tpacpi_acpi_handle_locate_callback, 726 (void *)name, &device_found); 727 728 *handle = NULL; 729 730 if (ACPI_SUCCESS(status)) { 731 *handle = device_found; 732 dbg_printk(TPACPI_DBG_INIT, 733 "Found ACPI handle for %s\n", name); 734 } else { 735 vdbg_printk(TPACPI_DBG_INIT, 736 "Could not locate an ACPI handle for %s: %s\n", 737 name, acpi_format_exception(status)); 738 } 739 } 740 741 static void dispatch_acpi_notify(acpi_handle handle, u32 event, void *data) 742 { 743 struct ibm_struct *ibm = data; 744 745 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 746 return; 747 748 if (!ibm || !ibm->acpi || !ibm->acpi->notify) 749 return; 750 751 ibm->acpi->notify(ibm, event); 752 } 753 754 static int __init setup_acpi_notify(struct ibm_struct *ibm) 755 { 756 acpi_status status; 757 int rc; 758 759 BUG_ON(!ibm->acpi); 760 761 if (!*ibm->acpi->handle) 762 return 0; 763 764 vdbg_printk(TPACPI_DBG_INIT, 765 "setting up ACPI notify for %s\n", ibm->name); 766 767 rc = acpi_bus_get_device(*ibm->acpi->handle, &ibm->acpi->device); 768 if (rc < 0) { 769 printk(TPACPI_ERR "acpi_bus_get_device(%s) failed: %d\n", 770 ibm->name, rc); 771 return -ENODEV; 772 } 773 774 ibm->acpi->device->driver_data = ibm; 775 sprintf(acpi_device_class(ibm->acpi->device), "%s/%s", 776 TPACPI_ACPI_EVENT_PREFIX, 777 ibm->name); 778 779 status = acpi_install_notify_handler(*ibm->acpi->handle, 780 ibm->acpi->type, dispatch_acpi_notify, ibm); 781 if (ACPI_FAILURE(status)) { 782 if (status == AE_ALREADY_EXISTS) { 783 printk(TPACPI_NOTICE 784 "another device driver is already " 785 "handling %s events\n", ibm->name); 786 } else { 787 printk(TPACPI_ERR 788 "acpi_install_notify_handler(%s) failed: %s\n", 789 ibm->name, acpi_format_exception(status)); 790 } 791 return -ENODEV; 792 } 793 ibm->flags.acpi_notify_installed = 1; 794 return 0; 795 } 796 797 static int __init tpacpi_device_add(struct acpi_device *device) 798 { 799 return 0; 800 } 801 802 static int __init register_tpacpi_subdriver(struct ibm_struct *ibm) 803 { 804 int rc; 805 806 dbg_printk(TPACPI_DBG_INIT, 807 "registering %s as an ACPI driver\n", ibm->name); 808 809 BUG_ON(!ibm->acpi); 810 811 ibm->acpi->driver = kzalloc(sizeof(struct acpi_driver), GFP_KERNEL); 812 if (!ibm->acpi->driver) { 813 printk(TPACPI_ERR 814 "failed to allocate memory for ibm->acpi->driver\n"); 815 return -ENOMEM; 816 } 817 818 sprintf(ibm->acpi->driver->name, "%s_%s", TPACPI_NAME, ibm->name); 819 ibm->acpi->driver->ids = ibm->acpi->hid; 820 821 ibm->acpi->driver->ops.add = &tpacpi_device_add; 822 823 rc = acpi_bus_register_driver(ibm->acpi->driver); 824 if (rc < 0) { 825 printk(TPACPI_ERR "acpi_bus_register_driver(%s) failed: %d\n", 826 ibm->name, rc); 827 kfree(ibm->acpi->driver); 828 ibm->acpi->driver = NULL; 829 } else if (!rc) 830 ibm->flags.acpi_driver_registered = 1; 831 832 return rc; 833 } 834 835 836 /**************************************************************************** 837 **************************************************************************** 838 * 839 * Procfs Helpers 840 * 841 **************************************************************************** 842 ****************************************************************************/ 843 844 static int dispatch_proc_show(struct seq_file *m, void *v) 845 { 846 struct ibm_struct *ibm = m->private; 847 848 if (!ibm || !ibm->read) 849 return -EINVAL; 850 return ibm->read(m); 851 } 852 853 static int dispatch_proc_open(struct inode *inode, struct file *file) 854 { 855 return single_open(file, dispatch_proc_show, PDE(inode)->data); 856 } 857 858 static ssize_t dispatch_proc_write(struct file *file, 859 const char __user *userbuf, 860 size_t count, loff_t *pos) 861 { 862 struct ibm_struct *ibm = PDE(file->f_path.dentry->d_inode)->data; 863 char *kernbuf; 864 int ret; 865 866 if (!ibm || !ibm->write) 867 return -EINVAL; 868 if (count > PAGE_SIZE - 2) 869 return -EINVAL; 870 871 kernbuf = kmalloc(count + 2, GFP_KERNEL); 872 if (!kernbuf) 873 return -ENOMEM; 874 875 if (copy_from_user(kernbuf, userbuf, count)) { 876 kfree(kernbuf); 877 return -EFAULT; 878 } 879 880 kernbuf[count] = 0; 881 strcat(kernbuf, ","); 882 ret = ibm->write(kernbuf); 883 if (ret == 0) 884 ret = count; 885 886 kfree(kernbuf); 887 888 return ret; 889 } 890 891 static const struct file_operations dispatch_proc_fops = { 892 .owner = THIS_MODULE, 893 .open = dispatch_proc_open, 894 .read = seq_read, 895 .llseek = seq_lseek, 896 .release = single_release, 897 .write = dispatch_proc_write, 898 }; 899 900 static char *next_cmd(char **cmds) 901 { 902 char *start = *cmds; 903 char *end; 904 905 while ((end = strchr(start, ',')) && end == start) 906 start = end + 1; 907 908 if (!end) 909 return NULL; 910 911 *end = 0; 912 *cmds = end + 1; 913 return start; 914 } 915 916 917 /**************************************************************************** 918 **************************************************************************** 919 * 920 * Device model: input, hwmon and platform 921 * 922 **************************************************************************** 923 ****************************************************************************/ 924 925 static struct platform_device *tpacpi_pdev; 926 static struct platform_device *tpacpi_sensors_pdev; 927 static struct device *tpacpi_hwmon; 928 static struct input_dev *tpacpi_inputdev; 929 static struct mutex tpacpi_inputdev_send_mutex; 930 static LIST_HEAD(tpacpi_all_drivers); 931 932 static int tpacpi_suspend_handler(struct platform_device *pdev, 933 pm_message_t state) 934 { 935 struct ibm_struct *ibm, *itmp; 936 937 list_for_each_entry_safe(ibm, itmp, 938 &tpacpi_all_drivers, 939 all_drivers) { 940 if (ibm->suspend) 941 (ibm->suspend)(state); 942 } 943 944 return 0; 945 } 946 947 static int tpacpi_resume_handler(struct platform_device *pdev) 948 { 949 struct ibm_struct *ibm, *itmp; 950 951 list_for_each_entry_safe(ibm, itmp, 952 &tpacpi_all_drivers, 953 all_drivers) { 954 if (ibm->resume) 955 (ibm->resume)(); 956 } 957 958 return 0; 959 } 960 961 static void tpacpi_shutdown_handler(struct platform_device *pdev) 962 { 963 struct ibm_struct *ibm, *itmp; 964 965 list_for_each_entry_safe(ibm, itmp, 966 &tpacpi_all_drivers, 967 all_drivers) { 968 if (ibm->shutdown) 969 (ibm->shutdown)(); 970 } 971 } 972 973 static struct platform_driver tpacpi_pdriver = { 974 .driver = { 975 .name = TPACPI_DRVR_NAME, 976 .owner = THIS_MODULE, 977 }, 978 .suspend = tpacpi_suspend_handler, 979 .resume = tpacpi_resume_handler, 980 .shutdown = tpacpi_shutdown_handler, 981 }; 982 983 static struct platform_driver tpacpi_hwmon_pdriver = { 984 .driver = { 985 .name = TPACPI_HWMON_DRVR_NAME, 986 .owner = THIS_MODULE, 987 }, 988 }; 989 990 /************************************************************************* 991 * sysfs support helpers 992 */ 993 994 struct attribute_set { 995 unsigned int members, max_members; 996 struct attribute_group group; 997 }; 998 999 struct attribute_set_obj { 1000 struct attribute_set s; 1001 struct attribute *a; 1002 } __attribute__((packed)); 1003 1004 static struct attribute_set *create_attr_set(unsigned int max_members, 1005 const char *name) 1006 { 1007 struct attribute_set_obj *sobj; 1008 1009 if (max_members == 0) 1010 return NULL; 1011 1012 /* Allocates space for implicit NULL at the end too */ 1013 sobj = kzalloc(sizeof(struct attribute_set_obj) + 1014 max_members * sizeof(struct attribute *), 1015 GFP_KERNEL); 1016 if (!sobj) 1017 return NULL; 1018 sobj->s.max_members = max_members; 1019 sobj->s.group.attrs = &sobj->a; 1020 sobj->s.group.name = name; 1021 1022 return &sobj->s; 1023 } 1024 1025 #define destroy_attr_set(_set) \ 1026 kfree(_set); 1027 1028 /* not multi-threaded safe, use it in a single thread per set */ 1029 static int add_to_attr_set(struct attribute_set *s, struct attribute *attr) 1030 { 1031 if (!s || !attr) 1032 return -EINVAL; 1033 1034 if (s->members >= s->max_members) 1035 return -ENOMEM; 1036 1037 s->group.attrs[s->members] = attr; 1038 s->members++; 1039 1040 return 0; 1041 } 1042 1043 static int add_many_to_attr_set(struct attribute_set *s, 1044 struct attribute **attr, 1045 unsigned int count) 1046 { 1047 int i, res; 1048 1049 for (i = 0; i < count; i++) { 1050 res = add_to_attr_set(s, attr[i]); 1051 if (res) 1052 return res; 1053 } 1054 1055 return 0; 1056 } 1057 1058 static void delete_attr_set(struct attribute_set *s, struct kobject *kobj) 1059 { 1060 sysfs_remove_group(kobj, &s->group); 1061 destroy_attr_set(s); 1062 } 1063 1064 #define register_attr_set_with_sysfs(_attr_set, _kobj) \ 1065 sysfs_create_group(_kobj, &_attr_set->group) 1066 1067 static int parse_strtoul(const char *buf, 1068 unsigned long max, unsigned long *value) 1069 { 1070 char *endp; 1071 1072 *value = simple_strtoul(skip_spaces(buf), &endp, 0); 1073 endp = skip_spaces(endp); 1074 if (*endp || *value > max) 1075 return -EINVAL; 1076 1077 return 0; 1078 } 1079 1080 static void tpacpi_disable_brightness_delay(void) 1081 { 1082 if (acpi_evalf(hkey_handle, NULL, "PWMS", "qvd", 0)) 1083 printk(TPACPI_NOTICE 1084 "ACPI backlight control delay disabled\n"); 1085 } 1086 1087 static void printk_deprecated_attribute(const char * const what, 1088 const char * const details) 1089 { 1090 tpacpi_log_usertask("deprecated sysfs attribute"); 1091 printk(TPACPI_WARN "WARNING: sysfs attribute %s is deprecated and " 1092 "will be removed. %s\n", 1093 what, details); 1094 } 1095 1096 /************************************************************************* 1097 * rfkill and radio control support helpers 1098 */ 1099 1100 /* 1101 * ThinkPad-ACPI firmware handling model: 1102 * 1103 * WLSW (master wireless switch) is event-driven, and is common to all 1104 * firmware-controlled radios. It cannot be controlled, just monitored, 1105 * as expected. It overrides all radio state in firmware 1106 * 1107 * The kernel, a masked-off hotkey, and WLSW can change the radio state 1108 * (TODO: verify how WLSW interacts with the returned radio state). 1109 * 1110 * The only time there are shadow radio state changes, is when 1111 * masked-off hotkeys are used. 1112 */ 1113 1114 /* 1115 * Internal driver API for radio state: 1116 * 1117 * int: < 0 = error, otherwise enum tpacpi_rfkill_state 1118 * bool: true means radio blocked (off) 1119 */ 1120 enum tpacpi_rfkill_state { 1121 TPACPI_RFK_RADIO_OFF = 0, 1122 TPACPI_RFK_RADIO_ON 1123 }; 1124 1125 /* rfkill switches */ 1126 enum tpacpi_rfk_id { 1127 TPACPI_RFK_BLUETOOTH_SW_ID = 0, 1128 TPACPI_RFK_WWAN_SW_ID, 1129 TPACPI_RFK_UWB_SW_ID, 1130 TPACPI_RFK_SW_MAX 1131 }; 1132 1133 static const char *tpacpi_rfkill_names[] = { 1134 [TPACPI_RFK_BLUETOOTH_SW_ID] = "bluetooth", 1135 [TPACPI_RFK_WWAN_SW_ID] = "wwan", 1136 [TPACPI_RFK_UWB_SW_ID] = "uwb", 1137 [TPACPI_RFK_SW_MAX] = NULL 1138 }; 1139 1140 /* ThinkPad-ACPI rfkill subdriver */ 1141 struct tpacpi_rfk { 1142 struct rfkill *rfkill; 1143 enum tpacpi_rfk_id id; 1144 const struct tpacpi_rfk_ops *ops; 1145 }; 1146 1147 struct tpacpi_rfk_ops { 1148 /* firmware interface */ 1149 int (*get_status)(void); 1150 int (*set_status)(const enum tpacpi_rfkill_state); 1151 }; 1152 1153 static struct tpacpi_rfk *tpacpi_rfkill_switches[TPACPI_RFK_SW_MAX]; 1154 1155 /* Query FW and update rfkill sw state for a given rfkill switch */ 1156 static int tpacpi_rfk_update_swstate(const struct tpacpi_rfk *tp_rfk) 1157 { 1158 int status; 1159 1160 if (!tp_rfk) 1161 return -ENODEV; 1162 1163 status = (tp_rfk->ops->get_status)(); 1164 if (status < 0) 1165 return status; 1166 1167 rfkill_set_sw_state(tp_rfk->rfkill, 1168 (status == TPACPI_RFK_RADIO_OFF)); 1169 1170 return status; 1171 } 1172 1173 /* Query FW and update rfkill sw state for all rfkill switches */ 1174 static void tpacpi_rfk_update_swstate_all(void) 1175 { 1176 unsigned int i; 1177 1178 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) 1179 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[i]); 1180 } 1181 1182 /* 1183 * Sync the HW-blocking state of all rfkill switches, 1184 * do notice it causes the rfkill core to schedule uevents 1185 */ 1186 static void tpacpi_rfk_update_hwblock_state(bool blocked) 1187 { 1188 unsigned int i; 1189 struct tpacpi_rfk *tp_rfk; 1190 1191 for (i = 0; i < TPACPI_RFK_SW_MAX; i++) { 1192 tp_rfk = tpacpi_rfkill_switches[i]; 1193 if (tp_rfk) { 1194 if (rfkill_set_hw_state(tp_rfk->rfkill, 1195 blocked)) { 1196 /* ignore -- we track sw block */ 1197 } 1198 } 1199 } 1200 } 1201 1202 /* Call to get the WLSW state from the firmware */ 1203 static int hotkey_get_wlsw(void); 1204 1205 /* Call to query WLSW state and update all rfkill switches */ 1206 static bool tpacpi_rfk_check_hwblock_state(void) 1207 { 1208 int res = hotkey_get_wlsw(); 1209 int hw_blocked; 1210 1211 /* When unknown or unsupported, we have to assume it is unblocked */ 1212 if (res < 0) 1213 return false; 1214 1215 hw_blocked = (res == TPACPI_RFK_RADIO_OFF); 1216 tpacpi_rfk_update_hwblock_state(hw_blocked); 1217 1218 return hw_blocked; 1219 } 1220 1221 static int tpacpi_rfk_hook_set_block(void *data, bool blocked) 1222 { 1223 struct tpacpi_rfk *tp_rfk = data; 1224 int res; 1225 1226 dbg_printk(TPACPI_DBG_RFKILL, 1227 "request to change radio state to %s\n", 1228 blocked ? "blocked" : "unblocked"); 1229 1230 /* try to set radio state */ 1231 res = (tp_rfk->ops->set_status)(blocked ? 1232 TPACPI_RFK_RADIO_OFF : TPACPI_RFK_RADIO_ON); 1233 1234 /* and update the rfkill core with whatever the FW really did */ 1235 tpacpi_rfk_update_swstate(tp_rfk); 1236 1237 return (res < 0) ? res : 0; 1238 } 1239 1240 static const struct rfkill_ops tpacpi_rfk_rfkill_ops = { 1241 .set_block = tpacpi_rfk_hook_set_block, 1242 }; 1243 1244 static int __init tpacpi_new_rfkill(const enum tpacpi_rfk_id id, 1245 const struct tpacpi_rfk_ops *tp_rfkops, 1246 const enum rfkill_type rfktype, 1247 const char *name, 1248 const bool set_default) 1249 { 1250 struct tpacpi_rfk *atp_rfk; 1251 int res; 1252 bool sw_state = false; 1253 bool hw_state; 1254 int sw_status; 1255 1256 BUG_ON(id >= TPACPI_RFK_SW_MAX || tpacpi_rfkill_switches[id]); 1257 1258 atp_rfk = kzalloc(sizeof(struct tpacpi_rfk), GFP_KERNEL); 1259 if (atp_rfk) 1260 atp_rfk->rfkill = rfkill_alloc(name, 1261 &tpacpi_pdev->dev, 1262 rfktype, 1263 &tpacpi_rfk_rfkill_ops, 1264 atp_rfk); 1265 if (!atp_rfk || !atp_rfk->rfkill) { 1266 printk(TPACPI_ERR 1267 "failed to allocate memory for rfkill class\n"); 1268 kfree(atp_rfk); 1269 return -ENOMEM; 1270 } 1271 1272 atp_rfk->id = id; 1273 atp_rfk->ops = tp_rfkops; 1274 1275 sw_status = (tp_rfkops->get_status)(); 1276 if (sw_status < 0) { 1277 printk(TPACPI_ERR 1278 "failed to read initial state for %s, error %d\n", 1279 name, sw_status); 1280 } else { 1281 sw_state = (sw_status == TPACPI_RFK_RADIO_OFF); 1282 if (set_default) { 1283 /* try to keep the initial state, since we ask the 1284 * firmware to preserve it across S5 in NVRAM */ 1285 rfkill_init_sw_state(atp_rfk->rfkill, sw_state); 1286 } 1287 } 1288 hw_state = tpacpi_rfk_check_hwblock_state(); 1289 rfkill_set_hw_state(atp_rfk->rfkill, hw_state); 1290 1291 res = rfkill_register(atp_rfk->rfkill); 1292 if (res < 0) { 1293 printk(TPACPI_ERR 1294 "failed to register %s rfkill switch: %d\n", 1295 name, res); 1296 rfkill_destroy(atp_rfk->rfkill); 1297 kfree(atp_rfk); 1298 return res; 1299 } 1300 1301 tpacpi_rfkill_switches[id] = atp_rfk; 1302 1303 printk(TPACPI_INFO "rfkill switch %s: radio is %sblocked\n", 1304 name, (sw_state || hw_state) ? "" : "un"); 1305 return 0; 1306 } 1307 1308 static void tpacpi_destroy_rfkill(const enum tpacpi_rfk_id id) 1309 { 1310 struct tpacpi_rfk *tp_rfk; 1311 1312 BUG_ON(id >= TPACPI_RFK_SW_MAX); 1313 1314 tp_rfk = tpacpi_rfkill_switches[id]; 1315 if (tp_rfk) { 1316 rfkill_unregister(tp_rfk->rfkill); 1317 rfkill_destroy(tp_rfk->rfkill); 1318 tpacpi_rfkill_switches[id] = NULL; 1319 kfree(tp_rfk); 1320 } 1321 } 1322 1323 static void printk_deprecated_rfkill_attribute(const char * const what) 1324 { 1325 printk_deprecated_attribute(what, 1326 "Please switch to generic rfkill before year 2010"); 1327 } 1328 1329 /* sysfs <radio> enable ------------------------------------------------ */ 1330 static ssize_t tpacpi_rfk_sysfs_enable_show(const enum tpacpi_rfk_id id, 1331 struct device_attribute *attr, 1332 char *buf) 1333 { 1334 int status; 1335 1336 printk_deprecated_rfkill_attribute(attr->attr.name); 1337 1338 /* This is in the ABI... */ 1339 if (tpacpi_rfk_check_hwblock_state()) { 1340 status = TPACPI_RFK_RADIO_OFF; 1341 } else { 1342 status = tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1343 if (status < 0) 1344 return status; 1345 } 1346 1347 return snprintf(buf, PAGE_SIZE, "%d\n", 1348 (status == TPACPI_RFK_RADIO_ON) ? 1 : 0); 1349 } 1350 1351 static ssize_t tpacpi_rfk_sysfs_enable_store(const enum tpacpi_rfk_id id, 1352 struct device_attribute *attr, 1353 const char *buf, size_t count) 1354 { 1355 unsigned long t; 1356 int res; 1357 1358 printk_deprecated_rfkill_attribute(attr->attr.name); 1359 1360 if (parse_strtoul(buf, 1, &t)) 1361 return -EINVAL; 1362 1363 tpacpi_disclose_usertask(attr->attr.name, "set to %ld\n", t); 1364 1365 /* This is in the ABI... */ 1366 if (tpacpi_rfk_check_hwblock_state() && !!t) 1367 return -EPERM; 1368 1369 res = tpacpi_rfkill_switches[id]->ops->set_status((!!t) ? 1370 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF); 1371 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1372 1373 return (res < 0) ? res : count; 1374 } 1375 1376 /* procfs -------------------------------------------------------------- */ 1377 static int tpacpi_rfk_procfs_read(const enum tpacpi_rfk_id id, struct seq_file *m) 1378 { 1379 if (id >= TPACPI_RFK_SW_MAX) 1380 seq_printf(m, "status:\t\tnot supported\n"); 1381 else { 1382 int status; 1383 1384 /* This is in the ABI... */ 1385 if (tpacpi_rfk_check_hwblock_state()) { 1386 status = TPACPI_RFK_RADIO_OFF; 1387 } else { 1388 status = tpacpi_rfk_update_swstate( 1389 tpacpi_rfkill_switches[id]); 1390 if (status < 0) 1391 return status; 1392 } 1393 1394 seq_printf(m, "status:\t\t%s\n", 1395 (status == TPACPI_RFK_RADIO_ON) ? 1396 "enabled" : "disabled"); 1397 seq_printf(m, "commands:\tenable, disable\n"); 1398 } 1399 1400 return 0; 1401 } 1402 1403 static int tpacpi_rfk_procfs_write(const enum tpacpi_rfk_id id, char *buf) 1404 { 1405 char *cmd; 1406 int status = -1; 1407 int res = 0; 1408 1409 if (id >= TPACPI_RFK_SW_MAX) 1410 return -ENODEV; 1411 1412 while ((cmd = next_cmd(&buf))) { 1413 if (strlencmp(cmd, "enable") == 0) 1414 status = TPACPI_RFK_RADIO_ON; 1415 else if (strlencmp(cmd, "disable") == 0) 1416 status = TPACPI_RFK_RADIO_OFF; 1417 else 1418 return -EINVAL; 1419 } 1420 1421 if (status != -1) { 1422 tpacpi_disclose_usertask("procfs", "attempt to %s %s\n", 1423 (status == TPACPI_RFK_RADIO_ON) ? 1424 "enable" : "disable", 1425 tpacpi_rfkill_names[id]); 1426 res = (tpacpi_rfkill_switches[id]->ops->set_status)(status); 1427 tpacpi_rfk_update_swstate(tpacpi_rfkill_switches[id]); 1428 } 1429 1430 return res; 1431 } 1432 1433 /************************************************************************* 1434 * thinkpad-acpi driver attributes 1435 */ 1436 1437 /* interface_version --------------------------------------------------- */ 1438 static ssize_t tpacpi_driver_interface_version_show( 1439 struct device_driver *drv, 1440 char *buf) 1441 { 1442 return snprintf(buf, PAGE_SIZE, "0x%08x\n", TPACPI_SYSFS_VERSION); 1443 } 1444 1445 static DRIVER_ATTR(interface_version, S_IRUGO, 1446 tpacpi_driver_interface_version_show, NULL); 1447 1448 /* debug_level --------------------------------------------------------- */ 1449 static ssize_t tpacpi_driver_debug_show(struct device_driver *drv, 1450 char *buf) 1451 { 1452 return snprintf(buf, PAGE_SIZE, "0x%04x\n", dbg_level); 1453 } 1454 1455 static ssize_t tpacpi_driver_debug_store(struct device_driver *drv, 1456 const char *buf, size_t count) 1457 { 1458 unsigned long t; 1459 1460 if (parse_strtoul(buf, 0xffff, &t)) 1461 return -EINVAL; 1462 1463 dbg_level = t; 1464 1465 return count; 1466 } 1467 1468 static DRIVER_ATTR(debug_level, S_IWUSR | S_IRUGO, 1469 tpacpi_driver_debug_show, tpacpi_driver_debug_store); 1470 1471 /* version ------------------------------------------------------------- */ 1472 static ssize_t tpacpi_driver_version_show(struct device_driver *drv, 1473 char *buf) 1474 { 1475 return snprintf(buf, PAGE_SIZE, "%s v%s\n", 1476 TPACPI_DESC, TPACPI_VERSION); 1477 } 1478 1479 static DRIVER_ATTR(version, S_IRUGO, 1480 tpacpi_driver_version_show, NULL); 1481 1482 /* --------------------------------------------------------------------- */ 1483 1484 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1485 1486 /* wlsw_emulstate ------------------------------------------------------ */ 1487 static ssize_t tpacpi_driver_wlsw_emulstate_show(struct device_driver *drv, 1488 char *buf) 1489 { 1490 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wlsw_emulstate); 1491 } 1492 1493 static ssize_t tpacpi_driver_wlsw_emulstate_store(struct device_driver *drv, 1494 const char *buf, size_t count) 1495 { 1496 unsigned long t; 1497 1498 if (parse_strtoul(buf, 1, &t)) 1499 return -EINVAL; 1500 1501 if (tpacpi_wlsw_emulstate != !!t) { 1502 tpacpi_wlsw_emulstate = !!t; 1503 tpacpi_rfk_update_hwblock_state(!t); /* negative logic */ 1504 } 1505 1506 return count; 1507 } 1508 1509 static DRIVER_ATTR(wlsw_emulstate, S_IWUSR | S_IRUGO, 1510 tpacpi_driver_wlsw_emulstate_show, 1511 tpacpi_driver_wlsw_emulstate_store); 1512 1513 /* bluetooth_emulstate ------------------------------------------------- */ 1514 static ssize_t tpacpi_driver_bluetooth_emulstate_show( 1515 struct device_driver *drv, 1516 char *buf) 1517 { 1518 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_bluetooth_emulstate); 1519 } 1520 1521 static ssize_t tpacpi_driver_bluetooth_emulstate_store( 1522 struct device_driver *drv, 1523 const char *buf, size_t count) 1524 { 1525 unsigned long t; 1526 1527 if (parse_strtoul(buf, 1, &t)) 1528 return -EINVAL; 1529 1530 tpacpi_bluetooth_emulstate = !!t; 1531 1532 return count; 1533 } 1534 1535 static DRIVER_ATTR(bluetooth_emulstate, S_IWUSR | S_IRUGO, 1536 tpacpi_driver_bluetooth_emulstate_show, 1537 tpacpi_driver_bluetooth_emulstate_store); 1538 1539 /* wwan_emulstate ------------------------------------------------- */ 1540 static ssize_t tpacpi_driver_wwan_emulstate_show( 1541 struct device_driver *drv, 1542 char *buf) 1543 { 1544 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_wwan_emulstate); 1545 } 1546 1547 static ssize_t tpacpi_driver_wwan_emulstate_store( 1548 struct device_driver *drv, 1549 const char *buf, size_t count) 1550 { 1551 unsigned long t; 1552 1553 if (parse_strtoul(buf, 1, &t)) 1554 return -EINVAL; 1555 1556 tpacpi_wwan_emulstate = !!t; 1557 1558 return count; 1559 } 1560 1561 static DRIVER_ATTR(wwan_emulstate, S_IWUSR | S_IRUGO, 1562 tpacpi_driver_wwan_emulstate_show, 1563 tpacpi_driver_wwan_emulstate_store); 1564 1565 /* uwb_emulstate ------------------------------------------------- */ 1566 static ssize_t tpacpi_driver_uwb_emulstate_show( 1567 struct device_driver *drv, 1568 char *buf) 1569 { 1570 return snprintf(buf, PAGE_SIZE, "%d\n", !!tpacpi_uwb_emulstate); 1571 } 1572 1573 static ssize_t tpacpi_driver_uwb_emulstate_store( 1574 struct device_driver *drv, 1575 const char *buf, 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 1587 static DRIVER_ATTR(uwb_emulstate, S_IWUSR | S_IRUGO, 1588 tpacpi_driver_uwb_emulstate_show, 1589 tpacpi_driver_uwb_emulstate_store); 1590 #endif 1591 1592 /* --------------------------------------------------------------------- */ 1593 1594 static struct driver_attribute *tpacpi_driver_attributes[] = { 1595 &driver_attr_debug_level, &driver_attr_version, 1596 &driver_attr_interface_version, 1597 }; 1598 1599 static int __init tpacpi_create_driver_attributes(struct device_driver *drv) 1600 { 1601 int i, res; 1602 1603 i = 0; 1604 res = 0; 1605 while (!res && i < ARRAY_SIZE(tpacpi_driver_attributes)) { 1606 res = driver_create_file(drv, tpacpi_driver_attributes[i]); 1607 i++; 1608 } 1609 1610 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 1611 if (!res && dbg_wlswemul) 1612 res = driver_create_file(drv, &driver_attr_wlsw_emulstate); 1613 if (!res && dbg_bluetoothemul) 1614 res = driver_create_file(drv, &driver_attr_bluetooth_emulstate); 1615 if (!res && dbg_wwanemul) 1616 res = driver_create_file(drv, &driver_attr_wwan_emulstate); 1617 if (!res && dbg_uwbemul) 1618 res = driver_create_file(drv, &driver_attr_uwb_emulstate); 1619 #endif 1620 1621 return res; 1622 } 1623 1624 static void tpacpi_remove_driver_attributes(struct device_driver *drv) 1625 { 1626 int i; 1627 1628 for (i = 0; i < ARRAY_SIZE(tpacpi_driver_attributes); i++) 1629 driver_remove_file(drv, tpacpi_driver_attributes[i]); 1630 1631 #ifdef THINKPAD_ACPI_DEBUGFACILITIES 1632 driver_remove_file(drv, &driver_attr_wlsw_emulstate); 1633 driver_remove_file(drv, &driver_attr_bluetooth_emulstate); 1634 driver_remove_file(drv, &driver_attr_wwan_emulstate); 1635 driver_remove_file(drv, &driver_attr_uwb_emulstate); 1636 #endif 1637 } 1638 1639 /************************************************************************* 1640 * Firmware Data 1641 */ 1642 1643 /* 1644 * Table of recommended minimum BIOS versions 1645 * 1646 * Reasons for listing: 1647 * 1. Stable BIOS, listed because the unknown amount of 1648 * bugs and bad ACPI behaviour on older versions 1649 * 1650 * 2. BIOS or EC fw with known bugs that trigger on Linux 1651 * 1652 * 3. BIOS with known reduced functionality in older versions 1653 * 1654 * We recommend the latest BIOS and EC version. 1655 * We only support the latest BIOS and EC fw version as a rule. 1656 * 1657 * Sources: IBM ThinkPad Public Web Documents (update changelogs), 1658 * Information from users in ThinkWiki 1659 * 1660 * WARNING: we use this table also to detect that the machine is 1661 * a ThinkPad in some cases, so don't remove entries lightly. 1662 */ 1663 1664 #define TPV_Q(__v, __id1, __id2, __bv1, __bv2) \ 1665 { .vendor = (__v), \ 1666 .bios = TPID(__id1, __id2), \ 1667 .ec = TPACPI_MATCH_ANY, \ 1668 .quirks = TPACPI_MATCH_ANY << 16 \ 1669 | (__bv1) << 8 | (__bv2) } 1670 1671 #define TPV_Q_X(__v, __bid1, __bid2, __bv1, __bv2, \ 1672 __eid, __ev1, __ev2) \ 1673 { .vendor = (__v), \ 1674 .bios = TPID(__bid1, __bid2), \ 1675 .ec = __eid, \ 1676 .quirks = (__ev1) << 24 | (__ev2) << 16 \ 1677 | (__bv1) << 8 | (__bv2) } 1678 1679 #define TPV_QI0(__id1, __id2, __bv1, __bv2) \ 1680 TPV_Q(PCI_VENDOR_ID_IBM, __id1, __id2, __bv1, __bv2) 1681 1682 /* Outdated IBM BIOSes often lack the EC id string */ 1683 #define TPV_QI1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1684 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1685 __bv1, __bv2, TPID(__id1, __id2), \ 1686 __ev1, __ev2), \ 1687 TPV_Q_X(PCI_VENDOR_ID_IBM, __id1, __id2, \ 1688 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1689 __ev1, __ev2) 1690 1691 /* Outdated IBM BIOSes often lack the EC id string */ 1692 #define TPV_QI2(__bid1, __bid2, __bv1, __bv2, \ 1693 __eid1, __eid2, __ev1, __ev2) \ 1694 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1695 __bv1, __bv2, TPID(__eid1, __eid2), \ 1696 __ev1, __ev2), \ 1697 TPV_Q_X(PCI_VENDOR_ID_IBM, __bid1, __bid2, \ 1698 __bv1, __bv2, TPACPI_MATCH_UNKNOWN, \ 1699 __ev1, __ev2) 1700 1701 #define TPV_QL0(__id1, __id2, __bv1, __bv2) \ 1702 TPV_Q(PCI_VENDOR_ID_LENOVO, __id1, __id2, __bv1, __bv2) 1703 1704 #define TPV_QL1(__id1, __id2, __bv1, __bv2, __ev1, __ev2) \ 1705 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __id1, __id2, \ 1706 __bv1, __bv2, TPID(__id1, __id2), \ 1707 __ev1, __ev2) 1708 1709 #define TPV_QL2(__bid1, __bid2, __bv1, __bv2, \ 1710 __eid1, __eid2, __ev1, __ev2) \ 1711 TPV_Q_X(PCI_VENDOR_ID_LENOVO, __bid1, __bid2, \ 1712 __bv1, __bv2, TPID(__eid1, __eid2), \ 1713 __ev1, __ev2) 1714 1715 static const struct tpacpi_quirk tpacpi_bios_version_qtable[] __initconst = { 1716 /* Numeric models ------------------ */ 1717 /* FW MODEL BIOS VERS */ 1718 TPV_QI0('I', 'M', '6', '5'), /* 570 */ 1719 TPV_QI0('I', 'U', '2', '6'), /* 570E */ 1720 TPV_QI0('I', 'B', '5', '4'), /* 600 */ 1721 TPV_QI0('I', 'H', '4', '7'), /* 600E */ 1722 TPV_QI0('I', 'N', '3', '6'), /* 600E */ 1723 TPV_QI0('I', 'T', '5', '5'), /* 600X */ 1724 TPV_QI0('I', 'D', '4', '8'), /* 770, 770E, 770ED */ 1725 TPV_QI0('I', 'I', '4', '2'), /* 770X */ 1726 TPV_QI0('I', 'O', '2', '3'), /* 770Z */ 1727 1728 /* A-series ------------------------- */ 1729 /* FW MODEL BIOS VERS EC VERS */ 1730 TPV_QI0('I', 'W', '5', '9'), /* A20m */ 1731 TPV_QI0('I', 'V', '6', '9'), /* A20p */ 1732 TPV_QI0('1', '0', '2', '6'), /* A21e, A22e */ 1733 TPV_QI0('K', 'U', '3', '6'), /* A21e */ 1734 TPV_QI0('K', 'X', '3', '6'), /* A21m, A22m */ 1735 TPV_QI0('K', 'Y', '3', '8'), /* A21p, A22p */ 1736 TPV_QI0('1', 'B', '1', '7'), /* A22e */ 1737 TPV_QI0('1', '3', '2', '0'), /* A22m */ 1738 TPV_QI0('1', 'E', '7', '3'), /* A30/p (0) */ 1739 TPV_QI1('1', 'G', '4', '1', '1', '7'), /* A31/p (0) */ 1740 TPV_QI1('1', 'N', '1', '6', '0', '7'), /* A31/p (0) */ 1741 1742 /* G-series ------------------------- */ 1743 /* FW MODEL BIOS VERS */ 1744 TPV_QI0('1', 'T', 'A', '6'), /* G40 */ 1745 TPV_QI0('1', 'X', '5', '7'), /* G41 */ 1746 1747 /* R-series, T-series --------------- */ 1748 /* FW MODEL BIOS VERS EC VERS */ 1749 TPV_QI0('1', 'C', 'F', '0'), /* R30 */ 1750 TPV_QI0('1', 'F', 'F', '1'), /* R31 */ 1751 TPV_QI0('1', 'M', '9', '7'), /* R32 */ 1752 TPV_QI0('1', 'O', '6', '1'), /* R40 */ 1753 TPV_QI0('1', 'P', '6', '5'), /* R40 */ 1754 TPV_QI0('1', 'S', '7', '0'), /* R40e */ 1755 TPV_QI1('1', 'R', 'D', 'R', '7', '1'), /* R50/p, R51, 1756 T40/p, T41/p, T42/p (1) */ 1757 TPV_QI1('1', 'V', '7', '1', '2', '8'), /* R50e, R51 (1) */ 1758 TPV_QI1('7', '8', '7', '1', '0', '6'), /* R51e (1) */ 1759 TPV_QI1('7', '6', '6', '9', '1', '6'), /* R52 (1) */ 1760 TPV_QI1('7', '0', '6', '9', '2', '8'), /* R52, T43 (1) */ 1761 1762 TPV_QI0('I', 'Y', '6', '1'), /* T20 */ 1763 TPV_QI0('K', 'Z', '3', '4'), /* T21 */ 1764 TPV_QI0('1', '6', '3', '2'), /* T22 */ 1765 TPV_QI1('1', 'A', '6', '4', '2', '3'), /* T23 (0) */ 1766 TPV_QI1('1', 'I', '7', '1', '2', '0'), /* T30 (0) */ 1767 TPV_QI1('1', 'Y', '6', '5', '2', '9'), /* T43/p (1) */ 1768 1769 TPV_QL1('7', '9', 'E', '3', '5', '0'), /* T60/p */ 1770 TPV_QL1('7', 'C', 'D', '2', '2', '2'), /* R60, R60i */ 1771 TPV_QL1('7', 'E', 'D', '0', '1', '5'), /* R60e, R60i */ 1772 1773 /* BIOS FW BIOS VERS EC FW EC VERS */ 1774 TPV_QI2('1', 'W', '9', '0', '1', 'V', '2', '8'), /* R50e (1) */ 1775 TPV_QL2('7', 'I', '3', '4', '7', '9', '5', '0'), /* T60/p wide */ 1776 1777 /* X-series ------------------------- */ 1778 /* FW MODEL BIOS VERS EC VERS */ 1779 TPV_QI0('I', 'Z', '9', 'D'), /* X20, X21 */ 1780 TPV_QI0('1', 'D', '7', '0'), /* X22, X23, X24 */ 1781 TPV_QI1('1', 'K', '4', '8', '1', '8'), /* X30 (0) */ 1782 TPV_QI1('1', 'Q', '9', '7', '2', '3'), /* X31, X32 (0) */ 1783 TPV_QI1('1', 'U', 'D', '3', 'B', '2'), /* X40 (0) */ 1784 TPV_QI1('7', '4', '6', '4', '2', '7'), /* X41 (0) */ 1785 TPV_QI1('7', '5', '6', '0', '2', '0'), /* X41t (0) */ 1786 1787 TPV_QL1('7', 'B', 'D', '7', '4', '0'), /* X60/s */ 1788 TPV_QL1('7', 'J', '3', '0', '1', '3'), /* X60t */ 1789 1790 /* (0) - older versions lack DMI EC fw string and functionality */ 1791 /* (1) - older versions known to lack functionality */ 1792 }; 1793 1794 #undef TPV_QL1 1795 #undef TPV_QL0 1796 #undef TPV_QI2 1797 #undef TPV_QI1 1798 #undef TPV_QI0 1799 #undef TPV_Q_X 1800 #undef TPV_Q 1801 1802 static void __init tpacpi_check_outdated_fw(void) 1803 { 1804 unsigned long fwvers; 1805 u16 ec_version, bios_version; 1806 1807 fwvers = tpacpi_check_quirks(tpacpi_bios_version_qtable, 1808 ARRAY_SIZE(tpacpi_bios_version_qtable)); 1809 1810 if (!fwvers) 1811 return; 1812 1813 bios_version = fwvers & 0xffffU; 1814 ec_version = (fwvers >> 16) & 0xffffU; 1815 1816 /* note that unknown versions are set to 0x0000 and we use that */ 1817 if ((bios_version > thinkpad_id.bios_release) || 1818 (ec_version > thinkpad_id.ec_release && 1819 ec_version != TPACPI_MATCH_ANY)) { 1820 /* 1821 * The changelogs would let us track down the exact 1822 * reason, but it is just too much of a pain to track 1823 * it. We only list BIOSes that are either really 1824 * broken, or really stable to begin with, so it is 1825 * best if the user upgrades the firmware anyway. 1826 */ 1827 printk(TPACPI_WARN 1828 "WARNING: Outdated ThinkPad BIOS/EC firmware\n"); 1829 printk(TPACPI_WARN 1830 "WARNING: This firmware may be missing critical bug " 1831 "fixes and/or important features\n"); 1832 } 1833 } 1834 1835 static bool __init tpacpi_is_fw_known(void) 1836 { 1837 return tpacpi_check_quirks(tpacpi_bios_version_qtable, 1838 ARRAY_SIZE(tpacpi_bios_version_qtable)) != 0; 1839 } 1840 1841 /**************************************************************************** 1842 **************************************************************************** 1843 * 1844 * Subdrivers 1845 * 1846 **************************************************************************** 1847 ****************************************************************************/ 1848 1849 /************************************************************************* 1850 * thinkpad-acpi metadata subdriver 1851 */ 1852 1853 static int thinkpad_acpi_driver_read(struct seq_file *m) 1854 { 1855 seq_printf(m, "driver:\t\t%s\n", TPACPI_DESC); 1856 seq_printf(m, "version:\t%s\n", TPACPI_VERSION); 1857 return 0; 1858 } 1859 1860 static struct ibm_struct thinkpad_acpi_driver_data = { 1861 .name = "driver", 1862 .read = thinkpad_acpi_driver_read, 1863 }; 1864 1865 /************************************************************************* 1866 * Hotkey subdriver 1867 */ 1868 1869 /* 1870 * ThinkPad firmware event model 1871 * 1872 * The ThinkPad firmware has two main event interfaces: normal ACPI 1873 * notifications (which follow the ACPI standard), and a private event 1874 * interface. 1875 * 1876 * The private event interface also issues events for the hotkeys. As 1877 * the driver gained features, the event handling code ended up being 1878 * built around the hotkey subdriver. This will need to be refactored 1879 * to a more formal event API eventually. 1880 * 1881 * Some "hotkeys" are actually supposed to be used as event reports, 1882 * such as "brightness has changed", "volume has changed", depending on 1883 * the ThinkPad model and how the firmware is operating. 1884 * 1885 * Unlike other classes, hotkey-class events have mask/unmask control on 1886 * non-ancient firmware. However, how it behaves changes a lot with the 1887 * firmware model and version. 1888 */ 1889 1890 enum { /* hot key scan codes (derived from ACPI DSDT) */ 1891 TP_ACPI_HOTKEYSCAN_FNF1 = 0, 1892 TP_ACPI_HOTKEYSCAN_FNF2, 1893 TP_ACPI_HOTKEYSCAN_FNF3, 1894 TP_ACPI_HOTKEYSCAN_FNF4, 1895 TP_ACPI_HOTKEYSCAN_FNF5, 1896 TP_ACPI_HOTKEYSCAN_FNF6, 1897 TP_ACPI_HOTKEYSCAN_FNF7, 1898 TP_ACPI_HOTKEYSCAN_FNF8, 1899 TP_ACPI_HOTKEYSCAN_FNF9, 1900 TP_ACPI_HOTKEYSCAN_FNF10, 1901 TP_ACPI_HOTKEYSCAN_FNF11, 1902 TP_ACPI_HOTKEYSCAN_FNF12, 1903 TP_ACPI_HOTKEYSCAN_FNBACKSPACE, 1904 TP_ACPI_HOTKEYSCAN_FNINSERT, 1905 TP_ACPI_HOTKEYSCAN_FNDELETE, 1906 TP_ACPI_HOTKEYSCAN_FNHOME, 1907 TP_ACPI_HOTKEYSCAN_FNEND, 1908 TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1909 TP_ACPI_HOTKEYSCAN_FNPAGEDOWN, 1910 TP_ACPI_HOTKEYSCAN_FNSPACE, 1911 TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1912 TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1913 TP_ACPI_HOTKEYSCAN_MUTE, 1914 TP_ACPI_HOTKEYSCAN_THINKPAD, 1915 TP_ACPI_HOTKEYSCAN_UNK1, 1916 TP_ACPI_HOTKEYSCAN_UNK2, 1917 TP_ACPI_HOTKEYSCAN_UNK3, 1918 TP_ACPI_HOTKEYSCAN_UNK4, 1919 TP_ACPI_HOTKEYSCAN_UNK5, 1920 TP_ACPI_HOTKEYSCAN_UNK6, 1921 TP_ACPI_HOTKEYSCAN_UNK7, 1922 TP_ACPI_HOTKEYSCAN_UNK8, 1923 1924 /* Hotkey keymap size */ 1925 TPACPI_HOTKEY_MAP_LEN 1926 }; 1927 1928 enum { /* Keys/events available through NVRAM polling */ 1929 TPACPI_HKEY_NVRAM_KNOWN_MASK = 0x00fb88c0U, 1930 TPACPI_HKEY_NVRAM_GOOD_MASK = 0x00fb8000U, 1931 }; 1932 1933 enum { /* Positions of some of the keys in hotkey masks */ 1934 TP_ACPI_HKEY_DISPSWTCH_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF7, 1935 TP_ACPI_HKEY_DISPXPAND_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF8, 1936 TP_ACPI_HKEY_HIBERNATE_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNF12, 1937 TP_ACPI_HKEY_BRGHTUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNHOME, 1938 TP_ACPI_HKEY_BRGHTDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNEND, 1939 TP_ACPI_HKEY_THNKLGHT_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNPAGEUP, 1940 TP_ACPI_HKEY_ZOOM_MASK = 1 << TP_ACPI_HOTKEYSCAN_FNSPACE, 1941 TP_ACPI_HKEY_VOLUP_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEUP, 1942 TP_ACPI_HKEY_VOLDWN_MASK = 1 << TP_ACPI_HOTKEYSCAN_VOLUMEDOWN, 1943 TP_ACPI_HKEY_MUTE_MASK = 1 << TP_ACPI_HOTKEYSCAN_MUTE, 1944 TP_ACPI_HKEY_THINKPAD_MASK = 1 << TP_ACPI_HOTKEYSCAN_THINKPAD, 1945 }; 1946 1947 enum { /* NVRAM to ACPI HKEY group map */ 1948 TP_NVRAM_HKEY_GROUP_HK2 = TP_ACPI_HKEY_THINKPAD_MASK | 1949 TP_ACPI_HKEY_ZOOM_MASK | 1950 TP_ACPI_HKEY_DISPSWTCH_MASK | 1951 TP_ACPI_HKEY_HIBERNATE_MASK, 1952 TP_NVRAM_HKEY_GROUP_BRIGHTNESS = TP_ACPI_HKEY_BRGHTUP_MASK | 1953 TP_ACPI_HKEY_BRGHTDWN_MASK, 1954 TP_NVRAM_HKEY_GROUP_VOLUME = TP_ACPI_HKEY_VOLUP_MASK | 1955 TP_ACPI_HKEY_VOLDWN_MASK | 1956 TP_ACPI_HKEY_MUTE_MASK, 1957 }; 1958 1959 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 1960 struct tp_nvram_state { 1961 u16 thinkpad_toggle:1; 1962 u16 zoom_toggle:1; 1963 u16 display_toggle:1; 1964 u16 thinklight_toggle:1; 1965 u16 hibernate_toggle:1; 1966 u16 displayexp_toggle:1; 1967 u16 display_state:1; 1968 u16 brightness_toggle:1; 1969 u16 volume_toggle:1; 1970 u16 mute:1; 1971 1972 u8 brightness_level; 1973 u8 volume_level; 1974 }; 1975 1976 /* kthread for the hotkey poller */ 1977 static struct task_struct *tpacpi_hotkey_task; 1978 1979 /* Acquired while the poller kthread is running, use to sync start/stop */ 1980 static struct mutex hotkey_thread_mutex; 1981 1982 /* 1983 * Acquire mutex to write poller control variables as an 1984 * atomic block. 1985 * 1986 * Increment hotkey_config_change when changing them if you 1987 * want the kthread to forget old state. 1988 * 1989 * See HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 1990 */ 1991 static struct mutex hotkey_thread_data_mutex; 1992 static unsigned int hotkey_config_change; 1993 1994 /* 1995 * hotkey poller control variables 1996 * 1997 * Must be atomic or readers will also need to acquire mutex 1998 * 1999 * HOTKEY_CONFIG_CRITICAL_START/HOTKEY_CONFIG_CRITICAL_END 2000 * should be used only when the changes need to be taken as 2001 * a block, OR when one needs to force the kthread to forget 2002 * old state. 2003 */ 2004 static u32 hotkey_source_mask; /* bit mask 0=ACPI,1=NVRAM */ 2005 static unsigned int hotkey_poll_freq = 10; /* Hz */ 2006 2007 #define HOTKEY_CONFIG_CRITICAL_START \ 2008 do { \ 2009 mutex_lock(&hotkey_thread_data_mutex); \ 2010 hotkey_config_change++; \ 2011 } while (0); 2012 #define HOTKEY_CONFIG_CRITICAL_END \ 2013 mutex_unlock(&hotkey_thread_data_mutex); 2014 2015 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2016 2017 #define hotkey_source_mask 0U 2018 #define HOTKEY_CONFIG_CRITICAL_START 2019 #define HOTKEY_CONFIG_CRITICAL_END 2020 2021 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2022 2023 static struct mutex hotkey_mutex; 2024 2025 static enum { /* Reasons for waking up */ 2026 TP_ACPI_WAKEUP_NONE = 0, /* None or unknown */ 2027 TP_ACPI_WAKEUP_BAYEJ, /* Bay ejection request */ 2028 TP_ACPI_WAKEUP_UNDOCK, /* Undock request */ 2029 } hotkey_wakeup_reason; 2030 2031 static int hotkey_autosleep_ack; 2032 2033 static u32 hotkey_orig_mask; /* events the BIOS had enabled */ 2034 static u32 hotkey_all_mask; /* all events supported in fw */ 2035 static u32 hotkey_reserved_mask; /* events better left disabled */ 2036 static u32 hotkey_driver_mask; /* events needed by the driver */ 2037 static u32 hotkey_user_mask; /* events visible to userspace */ 2038 static u32 hotkey_acpi_mask; /* events enabled in firmware */ 2039 2040 static unsigned int hotkey_report_mode; 2041 2042 static u16 *hotkey_keycode_map; 2043 2044 static struct attribute_set *hotkey_dev_attributes; 2045 2046 static void tpacpi_driver_event(const unsigned int hkey_event); 2047 static void hotkey_driver_event(const unsigned int scancode); 2048 static void hotkey_poll_setup(const bool may_warn); 2049 2050 /* HKEY.MHKG() return bits */ 2051 #define TP_HOTKEY_TABLET_MASK (1 << 3) 2052 2053 static int hotkey_get_wlsw(void) 2054 { 2055 int status; 2056 2057 if (!tp_features.hotkey_wlsw) 2058 return -ENODEV; 2059 2060 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 2061 if (dbg_wlswemul) 2062 return (tpacpi_wlsw_emulstate) ? 2063 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2064 #endif 2065 2066 if (!acpi_evalf(hkey_handle, &status, "WLSW", "d")) 2067 return -EIO; 2068 2069 return (status) ? TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 2070 } 2071 2072 static int hotkey_get_tablet_mode(int *status) 2073 { 2074 int s; 2075 2076 if (!acpi_evalf(hkey_handle, &s, "MHKG", "d")) 2077 return -EIO; 2078 2079 *status = ((s & TP_HOTKEY_TABLET_MASK) != 0); 2080 return 0; 2081 } 2082 2083 /* 2084 * Reads current event mask from firmware, and updates 2085 * hotkey_acpi_mask accordingly. Also resets any bits 2086 * from hotkey_user_mask that are unavailable to be 2087 * delivered (shadow requirement of the userspace ABI). 2088 * 2089 * Call with hotkey_mutex held 2090 */ 2091 static int hotkey_mask_get(void) 2092 { 2093 if (tp_features.hotkey_mask) { 2094 u32 m = 0; 2095 2096 if (!acpi_evalf(hkey_handle, &m, "DHKN", "d")) 2097 return -EIO; 2098 2099 hotkey_acpi_mask = m; 2100 } else { 2101 /* no mask support doesn't mean no event support... */ 2102 hotkey_acpi_mask = hotkey_all_mask; 2103 } 2104 2105 /* sync userspace-visible mask */ 2106 hotkey_user_mask &= (hotkey_acpi_mask | hotkey_source_mask); 2107 2108 return 0; 2109 } 2110 2111 void static hotkey_mask_warn_incomplete_mask(void) 2112 { 2113 /* log only what the user can fix... */ 2114 const u32 wantedmask = hotkey_driver_mask & 2115 ~(hotkey_acpi_mask | hotkey_source_mask) & 2116 (hotkey_all_mask | TPACPI_HKEY_NVRAM_KNOWN_MASK); 2117 2118 if (wantedmask) 2119 printk(TPACPI_NOTICE 2120 "required events 0x%08x not enabled!\n", 2121 wantedmask); 2122 } 2123 2124 /* 2125 * Set the firmware mask when supported 2126 * 2127 * Also calls hotkey_mask_get to update hotkey_acpi_mask. 2128 * 2129 * NOTE: does not set bits in hotkey_user_mask, but may reset them. 2130 * 2131 * Call with hotkey_mutex held 2132 */ 2133 static int hotkey_mask_set(u32 mask) 2134 { 2135 int i; 2136 int rc = 0; 2137 2138 const u32 fwmask = mask & ~hotkey_source_mask; 2139 2140 if (tp_features.hotkey_mask) { 2141 for (i = 0; i < 32; i++) { 2142 if (!acpi_evalf(hkey_handle, 2143 NULL, "MHKM", "vdd", i + 1, 2144 !!(mask & (1 << i)))) { 2145 rc = -EIO; 2146 break; 2147 } 2148 } 2149 } 2150 2151 /* 2152 * We *must* make an inconditional call to hotkey_mask_get to 2153 * refresh hotkey_acpi_mask and update hotkey_user_mask 2154 * 2155 * Take the opportunity to also log when we cannot _enable_ 2156 * a given event. 2157 */ 2158 if (!hotkey_mask_get() && !rc && (fwmask & ~hotkey_acpi_mask)) { 2159 printk(TPACPI_NOTICE 2160 "asked for hotkey mask 0x%08x, but " 2161 "firmware forced it to 0x%08x\n", 2162 fwmask, hotkey_acpi_mask); 2163 } 2164 2165 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING) 2166 hotkey_mask_warn_incomplete_mask(); 2167 2168 return rc; 2169 } 2170 2171 /* 2172 * Sets hotkey_user_mask and tries to set the firmware mask 2173 * 2174 * Call with hotkey_mutex held 2175 */ 2176 static int hotkey_user_mask_set(const u32 mask) 2177 { 2178 int rc; 2179 2180 /* Give people a chance to notice they are doing something that 2181 * is bound to go boom on their users sooner or later */ 2182 if (!tp_warned.hotkey_mask_ff && 2183 (mask == 0xffff || mask == 0xffffff || 2184 mask == 0xffffffff)) { 2185 tp_warned.hotkey_mask_ff = 1; 2186 printk(TPACPI_NOTICE 2187 "setting the hotkey mask to 0x%08x is likely " 2188 "not the best way to go about it\n", mask); 2189 printk(TPACPI_NOTICE 2190 "please consider using the driver defaults, " 2191 "and refer to up-to-date thinkpad-acpi " 2192 "documentation\n"); 2193 } 2194 2195 /* Try to enable what the user asked for, plus whatever we need. 2196 * this syncs everything but won't enable bits in hotkey_user_mask */ 2197 rc = hotkey_mask_set((mask | hotkey_driver_mask) & ~hotkey_source_mask); 2198 2199 /* Enable the available bits in hotkey_user_mask */ 2200 hotkey_user_mask = mask & (hotkey_acpi_mask | hotkey_source_mask); 2201 2202 return rc; 2203 } 2204 2205 /* 2206 * Sets the driver hotkey mask. 2207 * 2208 * Can be called even if the hotkey subdriver is inactive 2209 */ 2210 static int tpacpi_hotkey_driver_mask_set(const u32 mask) 2211 { 2212 int rc; 2213 2214 /* Do the right thing if hotkey_init has not been called yet */ 2215 if (!tp_features.hotkey) { 2216 hotkey_driver_mask = mask; 2217 return 0; 2218 } 2219 2220 mutex_lock(&hotkey_mutex); 2221 2222 HOTKEY_CONFIG_CRITICAL_START 2223 hotkey_driver_mask = mask; 2224 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2225 hotkey_source_mask |= (mask & ~hotkey_all_mask); 2226 #endif 2227 HOTKEY_CONFIG_CRITICAL_END 2228 2229 rc = hotkey_mask_set((hotkey_acpi_mask | hotkey_driver_mask) & 2230 ~hotkey_source_mask); 2231 hotkey_poll_setup(true); 2232 2233 mutex_unlock(&hotkey_mutex); 2234 2235 return rc; 2236 } 2237 2238 static int hotkey_status_get(int *status) 2239 { 2240 if (!acpi_evalf(hkey_handle, status, "DHKC", "d")) 2241 return -EIO; 2242 2243 return 0; 2244 } 2245 2246 static int hotkey_status_set(bool enable) 2247 { 2248 if (!acpi_evalf(hkey_handle, NULL, "MHKC", "vd", enable ? 1 : 0)) 2249 return -EIO; 2250 2251 return 0; 2252 } 2253 2254 static void tpacpi_input_send_tabletsw(void) 2255 { 2256 int state; 2257 2258 if (tp_features.hotkey_tablet && 2259 !hotkey_get_tablet_mode(&state)) { 2260 mutex_lock(&tpacpi_inputdev_send_mutex); 2261 2262 input_report_switch(tpacpi_inputdev, 2263 SW_TABLET_MODE, !!state); 2264 input_sync(tpacpi_inputdev); 2265 2266 mutex_unlock(&tpacpi_inputdev_send_mutex); 2267 } 2268 } 2269 2270 /* Do NOT call without validating scancode first */ 2271 static void tpacpi_input_send_key(const unsigned int scancode) 2272 { 2273 const unsigned int keycode = hotkey_keycode_map[scancode]; 2274 2275 if (keycode != KEY_RESERVED) { 2276 mutex_lock(&tpacpi_inputdev_send_mutex); 2277 2278 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2279 input_report_key(tpacpi_inputdev, keycode, 1); 2280 input_sync(tpacpi_inputdev); 2281 2282 input_event(tpacpi_inputdev, EV_MSC, MSC_SCAN, scancode); 2283 input_report_key(tpacpi_inputdev, keycode, 0); 2284 input_sync(tpacpi_inputdev); 2285 2286 mutex_unlock(&tpacpi_inputdev_send_mutex); 2287 } 2288 } 2289 2290 /* Do NOT call without validating scancode first */ 2291 static void tpacpi_input_send_key_masked(const unsigned int scancode) 2292 { 2293 hotkey_driver_event(scancode); 2294 if (hotkey_user_mask & (1 << scancode)) 2295 tpacpi_input_send_key(scancode); 2296 } 2297 2298 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2299 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver; 2300 2301 /* Do NOT call without validating scancode first */ 2302 static void tpacpi_hotkey_send_key(unsigned int scancode) 2303 { 2304 tpacpi_input_send_key_masked(scancode); 2305 if (hotkey_report_mode < 2) { 2306 acpi_bus_generate_proc_event(ibm_hotkey_acpidriver.device, 2307 0x80, TP_HKEY_EV_HOTKEY_BASE + scancode); 2308 } 2309 } 2310 2311 static void hotkey_read_nvram(struct tp_nvram_state *n, const u32 m) 2312 { 2313 u8 d; 2314 2315 if (m & TP_NVRAM_HKEY_GROUP_HK2) { 2316 d = nvram_read_byte(TP_NVRAM_ADDR_HK2); 2317 n->thinkpad_toggle = !!(d & TP_NVRAM_MASK_HKT_THINKPAD); 2318 n->zoom_toggle = !!(d & TP_NVRAM_MASK_HKT_ZOOM); 2319 n->display_toggle = !!(d & TP_NVRAM_MASK_HKT_DISPLAY); 2320 n->hibernate_toggle = !!(d & TP_NVRAM_MASK_HKT_HIBERNATE); 2321 } 2322 if (m & TP_ACPI_HKEY_THNKLGHT_MASK) { 2323 d = nvram_read_byte(TP_NVRAM_ADDR_THINKLIGHT); 2324 n->thinklight_toggle = !!(d & TP_NVRAM_MASK_THINKLIGHT); 2325 } 2326 if (m & TP_ACPI_HKEY_DISPXPAND_MASK) { 2327 d = nvram_read_byte(TP_NVRAM_ADDR_VIDEO); 2328 n->displayexp_toggle = 2329 !!(d & TP_NVRAM_MASK_HKT_DISPEXPND); 2330 } 2331 if (m & TP_NVRAM_HKEY_GROUP_BRIGHTNESS) { 2332 d = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 2333 n->brightness_level = (d & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 2334 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 2335 n->brightness_toggle = 2336 !!(d & TP_NVRAM_MASK_HKT_BRIGHTNESS); 2337 } 2338 if (m & TP_NVRAM_HKEY_GROUP_VOLUME) { 2339 d = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 2340 n->volume_level = (d & TP_NVRAM_MASK_LEVEL_VOLUME) 2341 >> TP_NVRAM_POS_LEVEL_VOLUME; 2342 n->mute = !!(d & TP_NVRAM_MASK_MUTE); 2343 n->volume_toggle = !!(d & TP_NVRAM_MASK_HKT_VOLUME); 2344 } 2345 } 2346 2347 static void hotkey_compare_and_issue_event(struct tp_nvram_state *oldn, 2348 struct tp_nvram_state *newn, 2349 const u32 event_mask) 2350 { 2351 2352 #define TPACPI_COMPARE_KEY(__scancode, __member) \ 2353 do { \ 2354 if ((event_mask & (1 << __scancode)) && \ 2355 oldn->__member != newn->__member) \ 2356 tpacpi_hotkey_send_key(__scancode); \ 2357 } while (0) 2358 2359 #define TPACPI_MAY_SEND_KEY(__scancode) \ 2360 do { \ 2361 if (event_mask & (1 << __scancode)) \ 2362 tpacpi_hotkey_send_key(__scancode); \ 2363 } while (0) 2364 2365 void issue_volchange(const unsigned int oldvol, 2366 const unsigned int newvol) 2367 { 2368 unsigned int i = oldvol; 2369 2370 while (i > newvol) { 2371 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2372 i--; 2373 } 2374 while (i < newvol) { 2375 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2376 i++; 2377 } 2378 } 2379 2380 void issue_brightnesschange(const unsigned int oldbrt, 2381 const unsigned int newbrt) 2382 { 2383 unsigned int i = oldbrt; 2384 2385 while (i > newbrt) { 2386 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2387 i--; 2388 } 2389 while (i < newbrt) { 2390 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2391 i++; 2392 } 2393 } 2394 2395 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_THINKPAD, thinkpad_toggle); 2396 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNSPACE, zoom_toggle); 2397 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF7, display_toggle); 2398 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF12, hibernate_toggle); 2399 2400 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNPAGEUP, thinklight_toggle); 2401 2402 TPACPI_COMPARE_KEY(TP_ACPI_HOTKEYSCAN_FNF8, displayexp_toggle); 2403 2404 /* 2405 * Handle volume 2406 * 2407 * This code is supposed to duplicate the IBM firmware behaviour: 2408 * - Pressing MUTE issues mute hotkey message, even when already mute 2409 * - Pressing Volume up/down issues volume up/down hotkey messages, 2410 * even when already at maximum or minumum volume 2411 * - The act of unmuting issues volume up/down notification, 2412 * depending which key was used to unmute 2413 * 2414 * We are constrained to what the NVRAM can tell us, which is not much 2415 * and certainly not enough if more than one volume hotkey was pressed 2416 * since the last poll cycle. 2417 * 2418 * Just to make our life interesting, some newer Lenovo ThinkPads have 2419 * bugs in the BIOS and may fail to update volume_toggle properly. 2420 */ 2421 if (newn->mute) { 2422 /* muted */ 2423 if (!oldn->mute || 2424 oldn->volume_toggle != newn->volume_toggle || 2425 oldn->volume_level != newn->volume_level) { 2426 /* recently muted, or repeated mute keypress, or 2427 * multiple presses ending in mute */ 2428 issue_volchange(oldn->volume_level, newn->volume_level); 2429 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_MUTE); 2430 } 2431 } else { 2432 /* unmute */ 2433 if (oldn->mute) { 2434 /* recently unmuted, issue 'unmute' keypress */ 2435 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2436 } 2437 if (oldn->volume_level != newn->volume_level) { 2438 issue_volchange(oldn->volume_level, newn->volume_level); 2439 } else if (oldn->volume_toggle != newn->volume_toggle) { 2440 /* repeated vol up/down keypress at end of scale ? */ 2441 if (newn->volume_level == 0) 2442 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEDOWN); 2443 else if (newn->volume_level >= TP_NVRAM_LEVEL_VOLUME_MAX) 2444 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_VOLUMEUP); 2445 } 2446 } 2447 2448 /* handle brightness */ 2449 if (oldn->brightness_level != newn->brightness_level) { 2450 issue_brightnesschange(oldn->brightness_level, 2451 newn->brightness_level); 2452 } else if (oldn->brightness_toggle != newn->brightness_toggle) { 2453 /* repeated key presses that didn't change state */ 2454 if (newn->brightness_level == 0) 2455 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNEND); 2456 else if (newn->brightness_level >= bright_maxlvl 2457 && !tp_features.bright_unkfw) 2458 TPACPI_MAY_SEND_KEY(TP_ACPI_HOTKEYSCAN_FNHOME); 2459 } 2460 2461 #undef TPACPI_COMPARE_KEY 2462 #undef TPACPI_MAY_SEND_KEY 2463 } 2464 2465 /* 2466 * Polling driver 2467 * 2468 * We track all events in hotkey_source_mask all the time, since 2469 * most of them are edge-based. We only issue those requested by 2470 * hotkey_user_mask or hotkey_driver_mask, though. 2471 */ 2472 static int hotkey_kthread(void *data) 2473 { 2474 struct tp_nvram_state s[2]; 2475 u32 poll_mask, event_mask; 2476 unsigned int si, so; 2477 unsigned long t; 2478 unsigned int change_detector, must_reset; 2479 unsigned int poll_freq; 2480 2481 mutex_lock(&hotkey_thread_mutex); 2482 2483 if (tpacpi_lifecycle == TPACPI_LIFE_EXITING) 2484 goto exit; 2485 2486 set_freezable(); 2487 2488 so = 0; 2489 si = 1; 2490 t = 0; 2491 2492 /* Initial state for compares */ 2493 mutex_lock(&hotkey_thread_data_mutex); 2494 change_detector = hotkey_config_change; 2495 poll_mask = hotkey_source_mask; 2496 event_mask = hotkey_source_mask & 2497 (hotkey_driver_mask | hotkey_user_mask); 2498 poll_freq = hotkey_poll_freq; 2499 mutex_unlock(&hotkey_thread_data_mutex); 2500 hotkey_read_nvram(&s[so], poll_mask); 2501 2502 while (!kthread_should_stop()) { 2503 if (t == 0) { 2504 if (likely(poll_freq)) 2505 t = 1000/poll_freq; 2506 else 2507 t = 100; /* should never happen... */ 2508 } 2509 t = msleep_interruptible(t); 2510 if (unlikely(kthread_should_stop())) 2511 break; 2512 must_reset = try_to_freeze(); 2513 if (t > 0 && !must_reset) 2514 continue; 2515 2516 mutex_lock(&hotkey_thread_data_mutex); 2517 if (must_reset || hotkey_config_change != change_detector) { 2518 /* forget old state on thaw or config change */ 2519 si = so; 2520 t = 0; 2521 change_detector = hotkey_config_change; 2522 } 2523 poll_mask = hotkey_source_mask; 2524 event_mask = hotkey_source_mask & 2525 (hotkey_driver_mask | hotkey_user_mask); 2526 poll_freq = hotkey_poll_freq; 2527 mutex_unlock(&hotkey_thread_data_mutex); 2528 2529 if (likely(poll_mask)) { 2530 hotkey_read_nvram(&s[si], poll_mask); 2531 if (likely(si != so)) { 2532 hotkey_compare_and_issue_event(&s[so], &s[si], 2533 event_mask); 2534 } 2535 } 2536 2537 so = si; 2538 si ^= 1; 2539 } 2540 2541 exit: 2542 mutex_unlock(&hotkey_thread_mutex); 2543 return 0; 2544 } 2545 2546 /* call with hotkey_mutex held */ 2547 static void hotkey_poll_stop_sync(void) 2548 { 2549 if (tpacpi_hotkey_task) { 2550 if (frozen(tpacpi_hotkey_task) || 2551 freezing(tpacpi_hotkey_task)) 2552 thaw_process(tpacpi_hotkey_task); 2553 2554 kthread_stop(tpacpi_hotkey_task); 2555 tpacpi_hotkey_task = NULL; 2556 mutex_lock(&hotkey_thread_mutex); 2557 /* at this point, the thread did exit */ 2558 mutex_unlock(&hotkey_thread_mutex); 2559 } 2560 } 2561 2562 /* call with hotkey_mutex held */ 2563 static void hotkey_poll_setup(const bool may_warn) 2564 { 2565 const u32 poll_driver_mask = hotkey_driver_mask & hotkey_source_mask; 2566 const u32 poll_user_mask = hotkey_user_mask & hotkey_source_mask; 2567 2568 if (hotkey_poll_freq > 0 && 2569 (poll_driver_mask || 2570 (poll_user_mask && tpacpi_inputdev->users > 0))) { 2571 if (!tpacpi_hotkey_task) { 2572 tpacpi_hotkey_task = kthread_run(hotkey_kthread, 2573 NULL, TPACPI_NVRAM_KTHREAD_NAME); 2574 if (IS_ERR(tpacpi_hotkey_task)) { 2575 tpacpi_hotkey_task = NULL; 2576 printk(TPACPI_ERR 2577 "could not create kernel thread " 2578 "for hotkey polling\n"); 2579 } 2580 } 2581 } else { 2582 hotkey_poll_stop_sync(); 2583 if (may_warn && (poll_driver_mask || poll_user_mask) && 2584 hotkey_poll_freq == 0) { 2585 printk(TPACPI_NOTICE 2586 "hot keys 0x%08x and/or events 0x%08x " 2587 "require polling, which is currently " 2588 "disabled\n", 2589 poll_user_mask, poll_driver_mask); 2590 } 2591 } 2592 } 2593 2594 static void hotkey_poll_setup_safe(const bool may_warn) 2595 { 2596 mutex_lock(&hotkey_mutex); 2597 hotkey_poll_setup(may_warn); 2598 mutex_unlock(&hotkey_mutex); 2599 } 2600 2601 /* call with hotkey_mutex held */ 2602 static void hotkey_poll_set_freq(unsigned int freq) 2603 { 2604 if (!freq) 2605 hotkey_poll_stop_sync(); 2606 2607 hotkey_poll_freq = freq; 2608 } 2609 2610 #else /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2611 2612 static void hotkey_poll_setup(const bool __unused) 2613 { 2614 } 2615 2616 static void hotkey_poll_setup_safe(const bool __unused) 2617 { 2618 } 2619 2620 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2621 2622 static int hotkey_inputdev_open(struct input_dev *dev) 2623 { 2624 switch (tpacpi_lifecycle) { 2625 case TPACPI_LIFE_INIT: 2626 case TPACPI_LIFE_RUNNING: 2627 hotkey_poll_setup_safe(false); 2628 return 0; 2629 case TPACPI_LIFE_EXITING: 2630 return -EBUSY; 2631 } 2632 2633 /* Should only happen if tpacpi_lifecycle is corrupt */ 2634 BUG(); 2635 return -EBUSY; 2636 } 2637 2638 static void hotkey_inputdev_close(struct input_dev *dev) 2639 { 2640 /* disable hotkey polling when possible */ 2641 if (tpacpi_lifecycle != TPACPI_LIFE_EXITING && 2642 !(hotkey_source_mask & hotkey_driver_mask)) 2643 hotkey_poll_setup_safe(false); 2644 } 2645 2646 /* sysfs hotkey enable ------------------------------------------------- */ 2647 static ssize_t hotkey_enable_show(struct device *dev, 2648 struct device_attribute *attr, 2649 char *buf) 2650 { 2651 int res, status; 2652 2653 printk_deprecated_attribute("hotkey_enable", 2654 "Hotkey reporting is always enabled"); 2655 2656 res = hotkey_status_get(&status); 2657 if (res) 2658 return res; 2659 2660 return snprintf(buf, PAGE_SIZE, "%d\n", status); 2661 } 2662 2663 static ssize_t hotkey_enable_store(struct device *dev, 2664 struct device_attribute *attr, 2665 const char *buf, size_t count) 2666 { 2667 unsigned long t; 2668 2669 printk_deprecated_attribute("hotkey_enable", 2670 "Hotkeys can be disabled through hotkey_mask"); 2671 2672 if (parse_strtoul(buf, 1, &t)) 2673 return -EINVAL; 2674 2675 if (t == 0) 2676 return -EPERM; 2677 2678 return count; 2679 } 2680 2681 static struct device_attribute dev_attr_hotkey_enable = 2682 __ATTR(hotkey_enable, S_IWUSR | S_IRUGO, 2683 hotkey_enable_show, hotkey_enable_store); 2684 2685 /* sysfs hotkey mask --------------------------------------------------- */ 2686 static ssize_t hotkey_mask_show(struct device *dev, 2687 struct device_attribute *attr, 2688 char *buf) 2689 { 2690 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_user_mask); 2691 } 2692 2693 static ssize_t hotkey_mask_store(struct device *dev, 2694 struct device_attribute *attr, 2695 const char *buf, size_t count) 2696 { 2697 unsigned long t; 2698 int res; 2699 2700 if (parse_strtoul(buf, 0xffffffffUL, &t)) 2701 return -EINVAL; 2702 2703 if (mutex_lock_killable(&hotkey_mutex)) 2704 return -ERESTARTSYS; 2705 2706 res = hotkey_user_mask_set(t); 2707 2708 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2709 hotkey_poll_setup(true); 2710 #endif 2711 2712 mutex_unlock(&hotkey_mutex); 2713 2714 tpacpi_disclose_usertask("hotkey_mask", "set to 0x%08lx\n", t); 2715 2716 return (res) ? res : count; 2717 } 2718 2719 static struct device_attribute dev_attr_hotkey_mask = 2720 __ATTR(hotkey_mask, S_IWUSR | S_IRUGO, 2721 hotkey_mask_show, hotkey_mask_store); 2722 2723 /* sysfs hotkey bios_enabled ------------------------------------------- */ 2724 static ssize_t hotkey_bios_enabled_show(struct device *dev, 2725 struct device_attribute *attr, 2726 char *buf) 2727 { 2728 return sprintf(buf, "0\n"); 2729 } 2730 2731 static struct device_attribute dev_attr_hotkey_bios_enabled = 2732 __ATTR(hotkey_bios_enabled, S_IRUGO, hotkey_bios_enabled_show, NULL); 2733 2734 /* sysfs hotkey bios_mask ---------------------------------------------- */ 2735 static ssize_t hotkey_bios_mask_show(struct device *dev, 2736 struct device_attribute *attr, 2737 char *buf) 2738 { 2739 printk_deprecated_attribute("hotkey_bios_mask", 2740 "This attribute is useless."); 2741 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_orig_mask); 2742 } 2743 2744 static struct device_attribute dev_attr_hotkey_bios_mask = 2745 __ATTR(hotkey_bios_mask, S_IRUGO, hotkey_bios_mask_show, NULL); 2746 2747 /* sysfs hotkey all_mask ----------------------------------------------- */ 2748 static ssize_t hotkey_all_mask_show(struct device *dev, 2749 struct device_attribute *attr, 2750 char *buf) 2751 { 2752 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2753 hotkey_all_mask | hotkey_source_mask); 2754 } 2755 2756 static struct device_attribute dev_attr_hotkey_all_mask = 2757 __ATTR(hotkey_all_mask, S_IRUGO, hotkey_all_mask_show, NULL); 2758 2759 /* sysfs hotkey recommended_mask --------------------------------------- */ 2760 static ssize_t hotkey_recommended_mask_show(struct device *dev, 2761 struct device_attribute *attr, 2762 char *buf) 2763 { 2764 return snprintf(buf, PAGE_SIZE, "0x%08x\n", 2765 (hotkey_all_mask | hotkey_source_mask) 2766 & ~hotkey_reserved_mask); 2767 } 2768 2769 static struct device_attribute dev_attr_hotkey_recommended_mask = 2770 __ATTR(hotkey_recommended_mask, S_IRUGO, 2771 hotkey_recommended_mask_show, NULL); 2772 2773 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2774 2775 /* sysfs hotkey hotkey_source_mask ------------------------------------- */ 2776 static ssize_t hotkey_source_mask_show(struct device *dev, 2777 struct device_attribute *attr, 2778 char *buf) 2779 { 2780 return snprintf(buf, PAGE_SIZE, "0x%08x\n", hotkey_source_mask); 2781 } 2782 2783 static ssize_t hotkey_source_mask_store(struct device *dev, 2784 struct device_attribute *attr, 2785 const char *buf, size_t count) 2786 { 2787 unsigned long t; 2788 u32 r_ev; 2789 int rc; 2790 2791 if (parse_strtoul(buf, 0xffffffffUL, &t) || 2792 ((t & ~TPACPI_HKEY_NVRAM_KNOWN_MASK) != 0)) 2793 return -EINVAL; 2794 2795 if (mutex_lock_killable(&hotkey_mutex)) 2796 return -ERESTARTSYS; 2797 2798 HOTKEY_CONFIG_CRITICAL_START 2799 hotkey_source_mask = t; 2800 HOTKEY_CONFIG_CRITICAL_END 2801 2802 rc = hotkey_mask_set((hotkey_user_mask | hotkey_driver_mask) & 2803 ~hotkey_source_mask); 2804 hotkey_poll_setup(true); 2805 2806 /* check if events needed by the driver got disabled */ 2807 r_ev = hotkey_driver_mask & ~(hotkey_acpi_mask & hotkey_all_mask) 2808 & ~hotkey_source_mask & TPACPI_HKEY_NVRAM_KNOWN_MASK; 2809 2810 mutex_unlock(&hotkey_mutex); 2811 2812 if (rc < 0) 2813 printk(TPACPI_ERR "hotkey_source_mask: failed to update the" 2814 "firmware event mask!\n"); 2815 2816 if (r_ev) 2817 printk(TPACPI_NOTICE "hotkey_source_mask: " 2818 "some important events were disabled: " 2819 "0x%04x\n", r_ev); 2820 2821 tpacpi_disclose_usertask("hotkey_source_mask", "set to 0x%08lx\n", t); 2822 2823 return (rc < 0) ? rc : count; 2824 } 2825 2826 static struct device_attribute dev_attr_hotkey_source_mask = 2827 __ATTR(hotkey_source_mask, S_IWUSR | S_IRUGO, 2828 hotkey_source_mask_show, hotkey_source_mask_store); 2829 2830 /* sysfs hotkey hotkey_poll_freq --------------------------------------- */ 2831 static ssize_t hotkey_poll_freq_show(struct device *dev, 2832 struct device_attribute *attr, 2833 char *buf) 2834 { 2835 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_poll_freq); 2836 } 2837 2838 static ssize_t hotkey_poll_freq_store(struct device *dev, 2839 struct device_attribute *attr, 2840 const char *buf, size_t count) 2841 { 2842 unsigned long t; 2843 2844 if (parse_strtoul(buf, 25, &t)) 2845 return -EINVAL; 2846 2847 if (mutex_lock_killable(&hotkey_mutex)) 2848 return -ERESTARTSYS; 2849 2850 hotkey_poll_set_freq(t); 2851 hotkey_poll_setup(true); 2852 2853 mutex_unlock(&hotkey_mutex); 2854 2855 tpacpi_disclose_usertask("hotkey_poll_freq", "set to %lu\n", t); 2856 2857 return count; 2858 } 2859 2860 static struct device_attribute dev_attr_hotkey_poll_freq = 2861 __ATTR(hotkey_poll_freq, S_IWUSR | S_IRUGO, 2862 hotkey_poll_freq_show, hotkey_poll_freq_store); 2863 2864 #endif /* CONFIG_THINKPAD_ACPI_HOTKEY_POLL */ 2865 2866 /* sysfs hotkey radio_sw (pollable) ------------------------------------ */ 2867 static ssize_t hotkey_radio_sw_show(struct device *dev, 2868 struct device_attribute *attr, 2869 char *buf) 2870 { 2871 int res; 2872 res = hotkey_get_wlsw(); 2873 if (res < 0) 2874 return res; 2875 2876 /* Opportunistic update */ 2877 tpacpi_rfk_update_hwblock_state((res == TPACPI_RFK_RADIO_OFF)); 2878 2879 return snprintf(buf, PAGE_SIZE, "%d\n", 2880 (res == TPACPI_RFK_RADIO_OFF) ? 0 : 1); 2881 } 2882 2883 static struct device_attribute dev_attr_hotkey_radio_sw = 2884 __ATTR(hotkey_radio_sw, S_IRUGO, hotkey_radio_sw_show, NULL); 2885 2886 static void hotkey_radio_sw_notify_change(void) 2887 { 2888 if (tp_features.hotkey_wlsw) 2889 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2890 "hotkey_radio_sw"); 2891 } 2892 2893 /* sysfs hotkey tablet mode (pollable) --------------------------------- */ 2894 static ssize_t hotkey_tablet_mode_show(struct device *dev, 2895 struct device_attribute *attr, 2896 char *buf) 2897 { 2898 int res, s; 2899 res = hotkey_get_tablet_mode(&s); 2900 if (res < 0) 2901 return res; 2902 2903 return snprintf(buf, PAGE_SIZE, "%d\n", !!s); 2904 } 2905 2906 static struct device_attribute dev_attr_hotkey_tablet_mode = 2907 __ATTR(hotkey_tablet_mode, S_IRUGO, hotkey_tablet_mode_show, NULL); 2908 2909 static void hotkey_tablet_mode_notify_change(void) 2910 { 2911 if (tp_features.hotkey_tablet) 2912 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2913 "hotkey_tablet_mode"); 2914 } 2915 2916 /* sysfs hotkey report_mode -------------------------------------------- */ 2917 static ssize_t hotkey_report_mode_show(struct device *dev, 2918 struct device_attribute *attr, 2919 char *buf) 2920 { 2921 return snprintf(buf, PAGE_SIZE, "%d\n", 2922 (hotkey_report_mode != 0) ? hotkey_report_mode : 1); 2923 } 2924 2925 static struct device_attribute dev_attr_hotkey_report_mode = 2926 __ATTR(hotkey_report_mode, S_IRUGO, hotkey_report_mode_show, NULL); 2927 2928 /* sysfs wakeup reason (pollable) -------------------------------------- */ 2929 static ssize_t hotkey_wakeup_reason_show(struct device *dev, 2930 struct device_attribute *attr, 2931 char *buf) 2932 { 2933 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_wakeup_reason); 2934 } 2935 2936 static struct device_attribute dev_attr_hotkey_wakeup_reason = 2937 __ATTR(wakeup_reason, S_IRUGO, hotkey_wakeup_reason_show, NULL); 2938 2939 static void hotkey_wakeup_reason_notify_change(void) 2940 { 2941 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2942 "wakeup_reason"); 2943 } 2944 2945 /* sysfs wakeup hotunplug_complete (pollable) -------------------------- */ 2946 static ssize_t hotkey_wakeup_hotunplug_complete_show(struct device *dev, 2947 struct device_attribute *attr, 2948 char *buf) 2949 { 2950 return snprintf(buf, PAGE_SIZE, "%d\n", hotkey_autosleep_ack); 2951 } 2952 2953 static struct device_attribute dev_attr_hotkey_wakeup_hotunplug_complete = 2954 __ATTR(wakeup_hotunplug_complete, S_IRUGO, 2955 hotkey_wakeup_hotunplug_complete_show, NULL); 2956 2957 static void hotkey_wakeup_hotunplug_complete_notify_change(void) 2958 { 2959 sysfs_notify(&tpacpi_pdev->dev.kobj, NULL, 2960 "wakeup_hotunplug_complete"); 2961 } 2962 2963 /* --------------------------------------------------------------------- */ 2964 2965 static struct attribute *hotkey_attributes[] __initdata = { 2966 &dev_attr_hotkey_enable.attr, 2967 &dev_attr_hotkey_bios_enabled.attr, 2968 &dev_attr_hotkey_bios_mask.attr, 2969 &dev_attr_hotkey_report_mode.attr, 2970 &dev_attr_hotkey_wakeup_reason.attr, 2971 &dev_attr_hotkey_wakeup_hotunplug_complete.attr, 2972 &dev_attr_hotkey_mask.attr, 2973 &dev_attr_hotkey_all_mask.attr, 2974 &dev_attr_hotkey_recommended_mask.attr, 2975 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 2976 &dev_attr_hotkey_source_mask.attr, 2977 &dev_attr_hotkey_poll_freq.attr, 2978 #endif 2979 }; 2980 2981 /* 2982 * Sync both the hw and sw blocking state of all switches 2983 */ 2984 static void tpacpi_send_radiosw_update(void) 2985 { 2986 int wlsw; 2987 2988 /* 2989 * We must sync all rfkill controllers *before* issuing any 2990 * rfkill input events, or we will race the rfkill core input 2991 * handler. 2992 * 2993 * tpacpi_inputdev_send_mutex works as a syncronization point 2994 * for the above. 2995 * 2996 * We optimize to avoid numerous calls to hotkey_get_wlsw. 2997 */ 2998 2999 wlsw = hotkey_get_wlsw(); 3000 3001 /* Sync hw blocking state first if it is hw-blocked */ 3002 if (wlsw == TPACPI_RFK_RADIO_OFF) 3003 tpacpi_rfk_update_hwblock_state(true); 3004 3005 /* Sync sw blocking state */ 3006 tpacpi_rfk_update_swstate_all(); 3007 3008 /* Sync hw blocking state last if it is hw-unblocked */ 3009 if (wlsw == TPACPI_RFK_RADIO_ON) 3010 tpacpi_rfk_update_hwblock_state(false); 3011 3012 /* Issue rfkill input event for WLSW switch */ 3013 if (!(wlsw < 0)) { 3014 mutex_lock(&tpacpi_inputdev_send_mutex); 3015 3016 input_report_switch(tpacpi_inputdev, 3017 SW_RFKILL_ALL, (wlsw > 0)); 3018 input_sync(tpacpi_inputdev); 3019 3020 mutex_unlock(&tpacpi_inputdev_send_mutex); 3021 } 3022 3023 /* 3024 * this can be unconditional, as we will poll state again 3025 * if userspace uses the notify to read data 3026 */ 3027 hotkey_radio_sw_notify_change(); 3028 } 3029 3030 static void hotkey_exit(void) 3031 { 3032 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3033 mutex_lock(&hotkey_mutex); 3034 hotkey_poll_stop_sync(); 3035 mutex_unlock(&hotkey_mutex); 3036 #endif 3037 3038 if (hotkey_dev_attributes) 3039 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3040 3041 kfree(hotkey_keycode_map); 3042 3043 dbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_HKEY, 3044 "restoring original HKEY status and mask\n"); 3045 /* yes, there is a bitwise or below, we want the 3046 * functions to be called even if one of them fail */ 3047 if (((tp_features.hotkey_mask && 3048 hotkey_mask_set(hotkey_orig_mask)) | 3049 hotkey_status_set(false)) != 0) 3050 printk(TPACPI_ERR 3051 "failed to restore hot key mask " 3052 "to BIOS defaults\n"); 3053 } 3054 3055 static void __init hotkey_unmap(const unsigned int scancode) 3056 { 3057 if (hotkey_keycode_map[scancode] != KEY_RESERVED) { 3058 clear_bit(hotkey_keycode_map[scancode], 3059 tpacpi_inputdev->keybit); 3060 hotkey_keycode_map[scancode] = KEY_RESERVED; 3061 } 3062 } 3063 3064 /* 3065 * HKEY quirks: 3066 * TPACPI_HK_Q_INIMASK: Supports FN+F3,FN+F4,FN+F12 3067 */ 3068 3069 #define TPACPI_HK_Q_INIMASK 0x0001 3070 3071 static const struct tpacpi_quirk tpacpi_hotkey_qtable[] __initconst = { 3072 TPACPI_Q_IBM('I', 'H', TPACPI_HK_Q_INIMASK), /* 600E */ 3073 TPACPI_Q_IBM('I', 'N', TPACPI_HK_Q_INIMASK), /* 600E */ 3074 TPACPI_Q_IBM('I', 'D', TPACPI_HK_Q_INIMASK), /* 770, 770E, 770ED */ 3075 TPACPI_Q_IBM('I', 'W', TPACPI_HK_Q_INIMASK), /* A20m */ 3076 TPACPI_Q_IBM('I', 'V', TPACPI_HK_Q_INIMASK), /* A20p */ 3077 TPACPI_Q_IBM('1', '0', TPACPI_HK_Q_INIMASK), /* A21e, A22e */ 3078 TPACPI_Q_IBM('K', 'U', TPACPI_HK_Q_INIMASK), /* A21e */ 3079 TPACPI_Q_IBM('K', 'X', TPACPI_HK_Q_INIMASK), /* A21m, A22m */ 3080 TPACPI_Q_IBM('K', 'Y', TPACPI_HK_Q_INIMASK), /* A21p, A22p */ 3081 TPACPI_Q_IBM('1', 'B', TPACPI_HK_Q_INIMASK), /* A22e */ 3082 TPACPI_Q_IBM('1', '3', TPACPI_HK_Q_INIMASK), /* A22m */ 3083 TPACPI_Q_IBM('1', 'E', TPACPI_HK_Q_INIMASK), /* A30/p (0) */ 3084 TPACPI_Q_IBM('1', 'C', TPACPI_HK_Q_INIMASK), /* R30 */ 3085 TPACPI_Q_IBM('1', 'F', TPACPI_HK_Q_INIMASK), /* R31 */ 3086 TPACPI_Q_IBM('I', 'Y', TPACPI_HK_Q_INIMASK), /* T20 */ 3087 TPACPI_Q_IBM('K', 'Z', TPACPI_HK_Q_INIMASK), /* T21 */ 3088 TPACPI_Q_IBM('1', '6', TPACPI_HK_Q_INIMASK), /* T22 */ 3089 TPACPI_Q_IBM('I', 'Z', TPACPI_HK_Q_INIMASK), /* X20, X21 */ 3090 TPACPI_Q_IBM('1', 'D', TPACPI_HK_Q_INIMASK), /* X22, X23, X24 */ 3091 }; 3092 3093 typedef u16 tpacpi_keymap_entry_t; 3094 typedef tpacpi_keymap_entry_t tpacpi_keymap_t[TPACPI_HOTKEY_MAP_LEN]; 3095 3096 static int __init hotkey_init(struct ibm_init_struct *iibm) 3097 { 3098 /* Requirements for changing the default keymaps: 3099 * 3100 * 1. Many of the keys are mapped to KEY_RESERVED for very 3101 * good reasons. Do not change them unless you have deep 3102 * knowledge on the IBM and Lenovo ThinkPad firmware for 3103 * the various ThinkPad models. The driver behaves 3104 * differently for KEY_RESERVED: such keys have their 3105 * hot key mask *unset* in mask_recommended, and also 3106 * in the initial hot key mask programmed into the 3107 * firmware at driver load time, which means the firm- 3108 * ware may react very differently if you change them to 3109 * something else; 3110 * 3111 * 2. You must be subscribed to the linux-thinkpad and 3112 * ibm-acpi-devel mailing lists, and you should read the 3113 * list archives since 2007 if you want to change the 3114 * keymaps. This requirement exists so that you will 3115 * know the past history of problems with the thinkpad- 3116 * acpi driver keymaps, and also that you will be 3117 * listening to any bug reports; 3118 * 3119 * 3. Do not send thinkpad-acpi specific patches directly to 3120 * for merging, *ever*. Send them to the linux-acpi 3121 * mailinglist for comments. Merging is to be done only 3122 * through acpi-test and the ACPI maintainer. 3123 * 3124 * If the above is too much to ask, don't change the keymap. 3125 * Ask the thinkpad-acpi maintainer to do it, instead. 3126 */ 3127 3128 enum keymap_index { 3129 TPACPI_KEYMAP_IBM_GENERIC = 0, 3130 TPACPI_KEYMAP_LENOVO_GENERIC, 3131 }; 3132 3133 static const tpacpi_keymap_t tpacpi_keymaps[] __initconst = { 3134 /* Generic keymap for IBM ThinkPads */ 3135 [TPACPI_KEYMAP_IBM_GENERIC] = { 3136 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3137 KEY_FN_F1, KEY_BATTERY, KEY_COFFEE, KEY_SLEEP, 3138 KEY_WLAN, KEY_FN_F6, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3139 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3140 3141 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3142 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3143 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3144 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3145 3146 /* brightness: firmware always reacts to them */ 3147 KEY_RESERVED, /* 0x0F: FN+HOME (brightness up) */ 3148 KEY_RESERVED, /* 0x10: FN+END (brightness down) */ 3149 3150 /* Thinklight: firmware always react to it */ 3151 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3152 3153 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3154 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3155 3156 /* Volume: firmware always react to it and reprograms 3157 * the built-in *extra* mixer. Never map it to control 3158 * another mixer by default. */ 3159 KEY_RESERVED, /* 0x14: VOLUME UP */ 3160 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3161 KEY_RESERVED, /* 0x16: MUTE */ 3162 3163 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3164 3165 /* (assignments unknown, please report if found) */ 3166 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3167 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3168 }, 3169 3170 /* Generic keymap for Lenovo ThinkPads */ 3171 [TPACPI_KEYMAP_LENOVO_GENERIC] = { 3172 /* Scan Codes 0x00 to 0x0B: ACPI HKEY FN+F1..F12 */ 3173 KEY_FN_F1, KEY_COFFEE, KEY_BATTERY, KEY_SLEEP, 3174 KEY_WLAN, KEY_CAMERA, KEY_SWITCHVIDEOMODE, KEY_FN_F8, 3175 KEY_FN_F9, KEY_FN_F10, KEY_FN_F11, KEY_SUSPEND, 3176 3177 /* Scan codes 0x0C to 0x1F: Other ACPI HKEY hot keys */ 3178 KEY_UNKNOWN, /* 0x0C: FN+BACKSPACE */ 3179 KEY_UNKNOWN, /* 0x0D: FN+INSERT */ 3180 KEY_UNKNOWN, /* 0x0E: FN+DELETE */ 3181 3182 /* These should be enabled --only-- when ACPI video 3183 * is disabled (i.e. in "vendor" mode), and are handled 3184 * in a special way by the init code */ 3185 KEY_BRIGHTNESSUP, /* 0x0F: FN+HOME (brightness up) */ 3186 KEY_BRIGHTNESSDOWN, /* 0x10: FN+END (brightness down) */ 3187 3188 KEY_RESERVED, /* 0x11: FN+PGUP (thinklight toggle) */ 3189 3190 KEY_UNKNOWN, /* 0x12: FN+PGDOWN */ 3191 KEY_ZOOM, /* 0x13: FN+SPACE (zoom) */ 3192 3193 /* Volume: z60/z61, T60 (BIOS version?): firmware always 3194 * react to it and reprograms the built-in *extra* mixer. 3195 * Never map it to control another mixer by default. 3196 * 3197 * T60?, T61, R60?, R61: firmware and EC tries to send 3198 * these over the regular keyboard, so these are no-ops, 3199 * but there are still weird bugs re. MUTE, so do not 3200 * change unless you get test reports from all Lenovo 3201 * models. May cause the BIOS to interfere with the 3202 * HDA mixer. 3203 */ 3204 KEY_RESERVED, /* 0x14: VOLUME UP */ 3205 KEY_RESERVED, /* 0x15: VOLUME DOWN */ 3206 KEY_RESERVED, /* 0x16: MUTE */ 3207 3208 KEY_VENDOR, /* 0x17: Thinkpad/AccessIBM/Lenovo */ 3209 3210 /* (assignments unknown, please report if found) */ 3211 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3212 KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, KEY_UNKNOWN, 3213 }, 3214 }; 3215 3216 static const struct tpacpi_quirk tpacpi_keymap_qtable[] __initconst = { 3217 /* Generic maps (fallback) */ 3218 { 3219 .vendor = PCI_VENDOR_ID_IBM, 3220 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3221 .quirks = TPACPI_KEYMAP_IBM_GENERIC, 3222 }, 3223 { 3224 .vendor = PCI_VENDOR_ID_LENOVO, 3225 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 3226 .quirks = TPACPI_KEYMAP_LENOVO_GENERIC, 3227 }, 3228 }; 3229 3230 #define TPACPI_HOTKEY_MAP_SIZE sizeof(tpacpi_keymap_t) 3231 #define TPACPI_HOTKEY_MAP_TYPESIZE sizeof(tpacpi_keymap_entry_t) 3232 3233 int res, i; 3234 int status; 3235 int hkeyv; 3236 bool radiosw_state = false; 3237 bool tabletsw_state = false; 3238 3239 unsigned long quirks; 3240 unsigned long keymap_id; 3241 3242 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3243 "initializing hotkey subdriver\n"); 3244 3245 BUG_ON(!tpacpi_inputdev); 3246 BUG_ON(tpacpi_inputdev->open != NULL || 3247 tpacpi_inputdev->close != NULL); 3248 3249 TPACPI_ACPIHANDLE_INIT(hkey); 3250 mutex_init(&hotkey_mutex); 3251 3252 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3253 mutex_init(&hotkey_thread_mutex); 3254 mutex_init(&hotkey_thread_data_mutex); 3255 #endif 3256 3257 /* hotkey not supported on 570 */ 3258 tp_features.hotkey = hkey_handle != NULL; 3259 3260 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3261 "hotkeys are %s\n", 3262 str_supported(tp_features.hotkey)); 3263 3264 if (!tp_features.hotkey) 3265 return 1; 3266 3267 quirks = tpacpi_check_quirks(tpacpi_hotkey_qtable, 3268 ARRAY_SIZE(tpacpi_hotkey_qtable)); 3269 3270 tpacpi_disable_brightness_delay(); 3271 3272 /* MUST have enough space for all attributes to be added to 3273 * hotkey_dev_attributes */ 3274 hotkey_dev_attributes = create_attr_set( 3275 ARRAY_SIZE(hotkey_attributes) + 2, 3276 NULL); 3277 if (!hotkey_dev_attributes) 3278 return -ENOMEM; 3279 res = add_many_to_attr_set(hotkey_dev_attributes, 3280 hotkey_attributes, 3281 ARRAY_SIZE(hotkey_attributes)); 3282 if (res) 3283 goto err_exit; 3284 3285 /* mask not supported on 600e/x, 770e, 770x, A21e, A2xm/p, 3286 A30, R30, R31, T20-22, X20-21, X22-24. Detected by checking 3287 for HKEY interface version 0x100 */ 3288 if (acpi_evalf(hkey_handle, &hkeyv, "MHKV", "qd")) { 3289 if ((hkeyv >> 8) != 1) { 3290 printk(TPACPI_ERR "unknown version of the " 3291 "HKEY interface: 0x%x\n", hkeyv); 3292 printk(TPACPI_ERR "please report this to %s\n", 3293 TPACPI_MAIL); 3294 } else { 3295 /* 3296 * MHKV 0x100 in A31, R40, R40e, 3297 * T4x, X31, and later 3298 */ 3299 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3300 "firmware HKEY interface version: 0x%x\n", 3301 hkeyv); 3302 3303 /* Paranoia check AND init hotkey_all_mask */ 3304 if (!acpi_evalf(hkey_handle, &hotkey_all_mask, 3305 "MHKA", "qd")) { 3306 printk(TPACPI_ERR 3307 "missing MHKA handler, " 3308 "please report this to %s\n", 3309 TPACPI_MAIL); 3310 /* Fallback: pre-init for FN+F3,F4,F12 */ 3311 hotkey_all_mask = 0x080cU; 3312 } else { 3313 tp_features.hotkey_mask = 1; 3314 } 3315 } 3316 } 3317 3318 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3319 "hotkey masks are %s\n", 3320 str_supported(tp_features.hotkey_mask)); 3321 3322 /* Init hotkey_all_mask if not initialized yet */ 3323 if (!tp_features.hotkey_mask && !hotkey_all_mask && 3324 (quirks & TPACPI_HK_Q_INIMASK)) 3325 hotkey_all_mask = 0x080cU; /* FN+F12, FN+F4, FN+F3 */ 3326 3327 /* Init hotkey_acpi_mask and hotkey_orig_mask */ 3328 if (tp_features.hotkey_mask) { 3329 /* hotkey_source_mask *must* be zero for 3330 * the first hotkey_mask_get to return hotkey_orig_mask */ 3331 res = hotkey_mask_get(); 3332 if (res) 3333 goto err_exit; 3334 3335 hotkey_orig_mask = hotkey_acpi_mask; 3336 } else { 3337 hotkey_orig_mask = hotkey_all_mask; 3338 hotkey_acpi_mask = hotkey_all_mask; 3339 } 3340 3341 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3342 if (dbg_wlswemul) { 3343 tp_features.hotkey_wlsw = 1; 3344 radiosw_state = !!tpacpi_wlsw_emulstate; 3345 printk(TPACPI_INFO 3346 "radio switch emulation enabled\n"); 3347 } else 3348 #endif 3349 /* Not all thinkpads have a hardware radio switch */ 3350 if (acpi_evalf(hkey_handle, &status, "WLSW", "qd")) { 3351 tp_features.hotkey_wlsw = 1; 3352 radiosw_state = !!status; 3353 printk(TPACPI_INFO 3354 "radio switch found; radios are %s\n", 3355 enabled(status, 0)); 3356 } 3357 if (tp_features.hotkey_wlsw) 3358 res = add_to_attr_set(hotkey_dev_attributes, 3359 &dev_attr_hotkey_radio_sw.attr); 3360 3361 /* For X41t, X60t, X61t Tablets... */ 3362 if (!res && acpi_evalf(hkey_handle, &status, "MHKG", "qd")) { 3363 tp_features.hotkey_tablet = 1; 3364 tabletsw_state = !!(status & TP_HOTKEY_TABLET_MASK); 3365 printk(TPACPI_INFO 3366 "possible tablet mode switch found; " 3367 "ThinkPad in %s mode\n", 3368 (tabletsw_state) ? "tablet" : "laptop"); 3369 res = add_to_attr_set(hotkey_dev_attributes, 3370 &dev_attr_hotkey_tablet_mode.attr); 3371 } 3372 3373 if (!res) 3374 res = register_attr_set_with_sysfs( 3375 hotkey_dev_attributes, 3376 &tpacpi_pdev->dev.kobj); 3377 if (res) 3378 goto err_exit; 3379 3380 /* Set up key map */ 3381 hotkey_keycode_map = kmalloc(TPACPI_HOTKEY_MAP_SIZE, 3382 GFP_KERNEL); 3383 if (!hotkey_keycode_map) { 3384 printk(TPACPI_ERR 3385 "failed to allocate memory for key map\n"); 3386 res = -ENOMEM; 3387 goto err_exit; 3388 } 3389 3390 keymap_id = tpacpi_check_quirks(tpacpi_keymap_qtable, 3391 ARRAY_SIZE(tpacpi_keymap_qtable)); 3392 BUG_ON(keymap_id >= ARRAY_SIZE(tpacpi_keymaps)); 3393 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3394 "using keymap number %lu\n", keymap_id); 3395 3396 memcpy(hotkey_keycode_map, &tpacpi_keymaps[keymap_id], 3397 TPACPI_HOTKEY_MAP_SIZE); 3398 3399 input_set_capability(tpacpi_inputdev, EV_MSC, MSC_SCAN); 3400 tpacpi_inputdev->keycodesize = TPACPI_HOTKEY_MAP_TYPESIZE; 3401 tpacpi_inputdev->keycodemax = TPACPI_HOTKEY_MAP_LEN; 3402 tpacpi_inputdev->keycode = hotkey_keycode_map; 3403 for (i = 0; i < TPACPI_HOTKEY_MAP_LEN; i++) { 3404 if (hotkey_keycode_map[i] != KEY_RESERVED) { 3405 input_set_capability(tpacpi_inputdev, EV_KEY, 3406 hotkey_keycode_map[i]); 3407 } else { 3408 if (i < sizeof(hotkey_reserved_mask)*8) 3409 hotkey_reserved_mask |= 1 << i; 3410 } 3411 } 3412 3413 if (tp_features.hotkey_wlsw) { 3414 input_set_capability(tpacpi_inputdev, EV_SW, SW_RFKILL_ALL); 3415 input_report_switch(tpacpi_inputdev, 3416 SW_RFKILL_ALL, radiosw_state); 3417 } 3418 if (tp_features.hotkey_tablet) { 3419 input_set_capability(tpacpi_inputdev, EV_SW, SW_TABLET_MODE); 3420 input_report_switch(tpacpi_inputdev, 3421 SW_TABLET_MODE, tabletsw_state); 3422 } 3423 3424 /* Do not issue duplicate brightness change events to 3425 * userspace. tpacpi_detect_brightness_capabilities() must have 3426 * been called before this point */ 3427 if (tp_features.bright_acpimode && acpi_video_backlight_support()) { 3428 printk(TPACPI_INFO 3429 "This ThinkPad has standard ACPI backlight " 3430 "brightness control, supported by the ACPI " 3431 "video driver\n"); 3432 printk(TPACPI_NOTICE 3433 "Disabling thinkpad-acpi brightness events " 3434 "by default...\n"); 3435 3436 /* Disable brightness up/down on Lenovo thinkpads when 3437 * ACPI is handling them, otherwise it is plain impossible 3438 * for userspace to do something even remotely sane */ 3439 hotkey_reserved_mask |= 3440 (1 << TP_ACPI_HOTKEYSCAN_FNHOME) 3441 | (1 << TP_ACPI_HOTKEYSCAN_FNEND); 3442 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNHOME); 3443 hotkey_unmap(TP_ACPI_HOTKEYSCAN_FNEND); 3444 } 3445 3446 #ifdef CONFIG_THINKPAD_ACPI_HOTKEY_POLL 3447 hotkey_source_mask = TPACPI_HKEY_NVRAM_GOOD_MASK 3448 & ~hotkey_all_mask 3449 & ~hotkey_reserved_mask; 3450 3451 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3452 "hotkey source mask 0x%08x, polling freq %u\n", 3453 hotkey_source_mask, hotkey_poll_freq); 3454 #endif 3455 3456 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3457 "enabling firmware HKEY event interface...\n"); 3458 res = hotkey_status_set(true); 3459 if (res) { 3460 hotkey_exit(); 3461 return res; 3462 } 3463 res = hotkey_mask_set(((hotkey_all_mask & ~hotkey_reserved_mask) 3464 | hotkey_driver_mask) 3465 & ~hotkey_source_mask); 3466 if (res < 0 && res != -ENXIO) { 3467 hotkey_exit(); 3468 return res; 3469 } 3470 hotkey_user_mask = (hotkey_acpi_mask | hotkey_source_mask) 3471 & ~hotkey_reserved_mask; 3472 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3473 "initial masks: user=0x%08x, fw=0x%08x, poll=0x%08x\n", 3474 hotkey_user_mask, hotkey_acpi_mask, hotkey_source_mask); 3475 3476 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_HKEY, 3477 "legacy ibm/hotkey event reporting over procfs %s\n", 3478 (hotkey_report_mode < 2) ? 3479 "enabled" : "disabled"); 3480 3481 tpacpi_inputdev->open = &hotkey_inputdev_open; 3482 tpacpi_inputdev->close = &hotkey_inputdev_close; 3483 3484 hotkey_poll_setup_safe(true); 3485 3486 return 0; 3487 3488 err_exit: 3489 delete_attr_set(hotkey_dev_attributes, &tpacpi_pdev->dev.kobj); 3490 hotkey_dev_attributes = NULL; 3491 3492 return (res < 0)? res : 1; 3493 } 3494 3495 static bool hotkey_notify_hotkey(const u32 hkey, 3496 bool *send_acpi_ev, 3497 bool *ignore_acpi_ev) 3498 { 3499 /* 0x1000-0x1FFF: key presses */ 3500 unsigned int scancode = hkey & 0xfff; 3501 *send_acpi_ev = true; 3502 *ignore_acpi_ev = false; 3503 3504 /* HKEY event 0x1001 is scancode 0x00 */ 3505 if (scancode > 0 && scancode <= TPACPI_HOTKEY_MAP_LEN) { 3506 scancode--; 3507 if (!(hotkey_source_mask & (1 << scancode))) { 3508 tpacpi_input_send_key_masked(scancode); 3509 *send_acpi_ev = false; 3510 } else { 3511 *ignore_acpi_ev = true; 3512 } 3513 return true; 3514 } 3515 return false; 3516 } 3517 3518 static bool hotkey_notify_wakeup(const u32 hkey, 3519 bool *send_acpi_ev, 3520 bool *ignore_acpi_ev) 3521 { 3522 /* 0x2000-0x2FFF: Wakeup reason */ 3523 *send_acpi_ev = true; 3524 *ignore_acpi_ev = false; 3525 3526 switch (hkey) { 3527 case TP_HKEY_EV_WKUP_S3_UNDOCK: /* suspend, undock */ 3528 case TP_HKEY_EV_WKUP_S4_UNDOCK: /* hibernation, undock */ 3529 hotkey_wakeup_reason = TP_ACPI_WAKEUP_UNDOCK; 3530 *ignore_acpi_ev = true; 3531 break; 3532 3533 case TP_HKEY_EV_WKUP_S3_BAYEJ: /* suspend, bay eject */ 3534 case TP_HKEY_EV_WKUP_S4_BAYEJ: /* hibernation, bay eject */ 3535 hotkey_wakeup_reason = TP_ACPI_WAKEUP_BAYEJ; 3536 *ignore_acpi_ev = true; 3537 break; 3538 3539 case TP_HKEY_EV_WKUP_S3_BATLOW: /* Battery on critical low level/S3 */ 3540 case TP_HKEY_EV_WKUP_S4_BATLOW: /* Battery on critical low level/S4 */ 3541 printk(TPACPI_ALERT 3542 "EMERGENCY WAKEUP: battery almost empty\n"); 3543 /* how to auto-heal: */ 3544 /* 2313: woke up from S3, go to S4/S5 */ 3545 /* 2413: woke up from S4, go to S5 */ 3546 break; 3547 3548 default: 3549 return false; 3550 } 3551 3552 if (hotkey_wakeup_reason != TP_ACPI_WAKEUP_NONE) { 3553 printk(TPACPI_INFO 3554 "woke up due to a hot-unplug " 3555 "request...\n"); 3556 hotkey_wakeup_reason_notify_change(); 3557 } 3558 return true; 3559 } 3560 3561 static bool hotkey_notify_usrevent(const u32 hkey, 3562 bool *send_acpi_ev, 3563 bool *ignore_acpi_ev) 3564 { 3565 /* 0x5000-0x5FFF: human interface helpers */ 3566 *send_acpi_ev = true; 3567 *ignore_acpi_ev = false; 3568 3569 switch (hkey) { 3570 case TP_HKEY_EV_PEN_INSERTED: /* X61t: tablet pen inserted into bay */ 3571 case TP_HKEY_EV_PEN_REMOVED: /* X61t: tablet pen removed from bay */ 3572 return true; 3573 3574 case TP_HKEY_EV_TABLET_TABLET: /* X41t-X61t: tablet mode */ 3575 case TP_HKEY_EV_TABLET_NOTEBOOK: /* X41t-X61t: normal mode */ 3576 tpacpi_input_send_tabletsw(); 3577 hotkey_tablet_mode_notify_change(); 3578 *send_acpi_ev = false; 3579 return true; 3580 3581 case TP_HKEY_EV_LID_CLOSE: /* Lid closed */ 3582 case TP_HKEY_EV_LID_OPEN: /* Lid opened */ 3583 case TP_HKEY_EV_BRGHT_CHANGED: /* brightness changed */ 3584 /* do not propagate these events */ 3585 *ignore_acpi_ev = true; 3586 return true; 3587 3588 default: 3589 return false; 3590 } 3591 } 3592 3593 static void thermal_dump_all_sensors(void); 3594 3595 static bool hotkey_notify_thermal(const u32 hkey, 3596 bool *send_acpi_ev, 3597 bool *ignore_acpi_ev) 3598 { 3599 bool known = true; 3600 3601 /* 0x6000-0x6FFF: thermal alarms */ 3602 *send_acpi_ev = true; 3603 *ignore_acpi_ev = false; 3604 3605 switch (hkey) { 3606 case TP_HKEY_EV_THM_TABLE_CHANGED: 3607 printk(TPACPI_INFO 3608 "EC reports that Thermal Table has changed\n"); 3609 /* recommended action: do nothing, we don't have 3610 * Lenovo ATM information */ 3611 return true; 3612 case TP_HKEY_EV_ALARM_BAT_HOT: 3613 printk(TPACPI_CRIT 3614 "THERMAL ALARM: battery is too hot!\n"); 3615 /* recommended action: warn user through gui */ 3616 break; 3617 case TP_HKEY_EV_ALARM_BAT_XHOT: 3618 printk(TPACPI_ALERT 3619 "THERMAL EMERGENCY: battery is extremely hot!\n"); 3620 /* recommended action: immediate sleep/hibernate */ 3621 break; 3622 case TP_HKEY_EV_ALARM_SENSOR_HOT: 3623 printk(TPACPI_CRIT 3624 "THERMAL ALARM: " 3625 "a sensor reports something is too hot!\n"); 3626 /* recommended action: warn user through gui, that */ 3627 /* some internal component is too hot */ 3628 break; 3629 case TP_HKEY_EV_ALARM_SENSOR_XHOT: 3630 printk(TPACPI_ALERT 3631 "THERMAL EMERGENCY: " 3632 "a sensor reports something is extremely hot!\n"); 3633 /* recommended action: immediate sleep/hibernate */ 3634 break; 3635 default: 3636 printk(TPACPI_ALERT 3637 "THERMAL ALERT: unknown thermal alarm received\n"); 3638 known = false; 3639 } 3640 3641 thermal_dump_all_sensors(); 3642 3643 return known; 3644 } 3645 3646 static void hotkey_notify(struct ibm_struct *ibm, u32 event) 3647 { 3648 u32 hkey; 3649 bool send_acpi_ev; 3650 bool ignore_acpi_ev; 3651 bool known_ev; 3652 3653 if (event != 0x80) { 3654 printk(TPACPI_ERR 3655 "unknown HKEY notification event %d\n", event); 3656 /* forward it to userspace, maybe it knows how to handle it */ 3657 acpi_bus_generate_netlink_event( 3658 ibm->acpi->device->pnp.device_class, 3659 dev_name(&ibm->acpi->device->dev), 3660 event, 0); 3661 return; 3662 } 3663 3664 while (1) { 3665 if (!acpi_evalf(hkey_handle, &hkey, "MHKP", "d")) { 3666 printk(TPACPI_ERR "failed to retrieve HKEY event\n"); 3667 return; 3668 } 3669 3670 if (hkey == 0) { 3671 /* queue empty */ 3672 return; 3673 } 3674 3675 send_acpi_ev = true; 3676 ignore_acpi_ev = false; 3677 3678 switch (hkey >> 12) { 3679 case 1: 3680 /* 0x1000-0x1FFF: key presses */ 3681 known_ev = hotkey_notify_hotkey(hkey, &send_acpi_ev, 3682 &ignore_acpi_ev); 3683 break; 3684 case 2: 3685 /* 0x2000-0x2FFF: Wakeup reason */ 3686 known_ev = hotkey_notify_wakeup(hkey, &send_acpi_ev, 3687 &ignore_acpi_ev); 3688 break; 3689 case 3: 3690 /* 0x3000-0x3FFF: bay-related wakeups */ 3691 switch (hkey) { 3692 case TP_HKEY_EV_BAYEJ_ACK: 3693 hotkey_autosleep_ack = 1; 3694 printk(TPACPI_INFO 3695 "bay ejected\n"); 3696 hotkey_wakeup_hotunplug_complete_notify_change(); 3697 known_ev = true; 3698 break; 3699 case TP_HKEY_EV_OPTDRV_EJ: 3700 /* FIXME: kick libata if SATA link offline */ 3701 known_ev = true; 3702 break; 3703 default: 3704 known_ev = false; 3705 } 3706 break; 3707 case 4: 3708 /* 0x4000-0x4FFF: dock-related wakeups */ 3709 if (hkey == TP_HKEY_EV_UNDOCK_ACK) { 3710 hotkey_autosleep_ack = 1; 3711 printk(TPACPI_INFO 3712 "undocked\n"); 3713 hotkey_wakeup_hotunplug_complete_notify_change(); 3714 known_ev = true; 3715 } else { 3716 known_ev = false; 3717 } 3718 break; 3719 case 5: 3720 /* 0x5000-0x5FFF: human interface helpers */ 3721 known_ev = hotkey_notify_usrevent(hkey, &send_acpi_ev, 3722 &ignore_acpi_ev); 3723 break; 3724 case 6: 3725 /* 0x6000-0x6FFF: thermal alarms */ 3726 known_ev = hotkey_notify_thermal(hkey, &send_acpi_ev, 3727 &ignore_acpi_ev); 3728 break; 3729 case 7: 3730 /* 0x7000-0x7FFF: misc */ 3731 if (tp_features.hotkey_wlsw && 3732 hkey == TP_HKEY_EV_RFKILL_CHANGED) { 3733 tpacpi_send_radiosw_update(); 3734 send_acpi_ev = 0; 3735 known_ev = true; 3736 break; 3737 } 3738 /* fallthrough to default */ 3739 default: 3740 known_ev = false; 3741 } 3742 if (!known_ev) { 3743 printk(TPACPI_NOTICE 3744 "unhandled HKEY event 0x%04x\n", hkey); 3745 printk(TPACPI_NOTICE 3746 "please report the conditions when this " 3747 "event happened to %s\n", TPACPI_MAIL); 3748 } 3749 3750 /* Legacy events */ 3751 if (!ignore_acpi_ev && 3752 (send_acpi_ev || hotkey_report_mode < 2)) { 3753 acpi_bus_generate_proc_event(ibm->acpi->device, 3754 event, hkey); 3755 } 3756 3757 /* netlink events */ 3758 if (!ignore_acpi_ev && send_acpi_ev) { 3759 acpi_bus_generate_netlink_event( 3760 ibm->acpi->device->pnp.device_class, 3761 dev_name(&ibm->acpi->device->dev), 3762 event, hkey); 3763 } 3764 } 3765 } 3766 3767 static void hotkey_suspend(pm_message_t state) 3768 { 3769 /* Do these on suspend, we get the events on early resume! */ 3770 hotkey_wakeup_reason = TP_ACPI_WAKEUP_NONE; 3771 hotkey_autosleep_ack = 0; 3772 } 3773 3774 static void hotkey_resume(void) 3775 { 3776 tpacpi_disable_brightness_delay(); 3777 3778 if (hotkey_status_set(true) < 0 || 3779 hotkey_mask_set(hotkey_acpi_mask) < 0) 3780 printk(TPACPI_ERR 3781 "error while attempting to reset the event " 3782 "firmware interface\n"); 3783 3784 tpacpi_send_radiosw_update(); 3785 hotkey_tablet_mode_notify_change(); 3786 hotkey_wakeup_reason_notify_change(); 3787 hotkey_wakeup_hotunplug_complete_notify_change(); 3788 hotkey_poll_setup_safe(false); 3789 } 3790 3791 /* procfs -------------------------------------------------------------- */ 3792 static int hotkey_read(struct seq_file *m) 3793 { 3794 int res, status; 3795 3796 if (!tp_features.hotkey) { 3797 seq_printf(m, "status:\t\tnot supported\n"); 3798 return 0; 3799 } 3800 3801 if (mutex_lock_killable(&hotkey_mutex)) 3802 return -ERESTARTSYS; 3803 res = hotkey_status_get(&status); 3804 if (!res) 3805 res = hotkey_mask_get(); 3806 mutex_unlock(&hotkey_mutex); 3807 if (res) 3808 return res; 3809 3810 seq_printf(m, "status:\t\t%s\n", enabled(status, 0)); 3811 if (hotkey_all_mask) { 3812 seq_printf(m, "mask:\t\t0x%08x\n", hotkey_user_mask); 3813 seq_printf(m, "commands:\tenable, disable, reset, <mask>\n"); 3814 } else { 3815 seq_printf(m, "mask:\t\tnot supported\n"); 3816 seq_printf(m, "commands:\tenable, disable, reset\n"); 3817 } 3818 3819 return 0; 3820 } 3821 3822 static void hotkey_enabledisable_warn(bool enable) 3823 { 3824 tpacpi_log_usertask("procfs hotkey enable/disable"); 3825 if (!WARN((tpacpi_lifecycle == TPACPI_LIFE_RUNNING || !enable), 3826 TPACPI_WARN 3827 "hotkey enable/disable functionality has been " 3828 "removed from the driver. Hotkeys are always " 3829 "enabled\n")) 3830 printk(TPACPI_ERR 3831 "Please remove the hotkey=enable module " 3832 "parameter, it is deprecated. Hotkeys are always " 3833 "enabled\n"); 3834 } 3835 3836 static int hotkey_write(char *buf) 3837 { 3838 int res; 3839 u32 mask; 3840 char *cmd; 3841 3842 if (!tp_features.hotkey) 3843 return -ENODEV; 3844 3845 if (mutex_lock_killable(&hotkey_mutex)) 3846 return -ERESTARTSYS; 3847 3848 mask = hotkey_user_mask; 3849 3850 res = 0; 3851 while ((cmd = next_cmd(&buf))) { 3852 if (strlencmp(cmd, "enable") == 0) { 3853 hotkey_enabledisable_warn(1); 3854 } else if (strlencmp(cmd, "disable") == 0) { 3855 hotkey_enabledisable_warn(0); 3856 res = -EPERM; 3857 } else if (strlencmp(cmd, "reset") == 0) { 3858 mask = (hotkey_all_mask | hotkey_source_mask) 3859 & ~hotkey_reserved_mask; 3860 } else if (sscanf(cmd, "0x%x", &mask) == 1) { 3861 /* mask set */ 3862 } else if (sscanf(cmd, "%x", &mask) == 1) { 3863 /* mask set */ 3864 } else { 3865 res = -EINVAL; 3866 goto errexit; 3867 } 3868 } 3869 3870 if (!res) { 3871 tpacpi_disclose_usertask("procfs hotkey", 3872 "set mask to 0x%08x\n", mask); 3873 res = hotkey_user_mask_set(mask); 3874 } 3875 3876 errexit: 3877 mutex_unlock(&hotkey_mutex); 3878 return res; 3879 } 3880 3881 static const struct acpi_device_id ibm_htk_device_ids[] = { 3882 {TPACPI_ACPI_HKEY_HID, 0}, 3883 {"", 0}, 3884 }; 3885 3886 static struct tp_acpi_drv_struct ibm_hotkey_acpidriver = { 3887 .hid = ibm_htk_device_ids, 3888 .notify = hotkey_notify, 3889 .handle = &hkey_handle, 3890 .type = ACPI_DEVICE_NOTIFY, 3891 }; 3892 3893 static struct ibm_struct hotkey_driver_data = { 3894 .name = "hotkey", 3895 .read = hotkey_read, 3896 .write = hotkey_write, 3897 .exit = hotkey_exit, 3898 .resume = hotkey_resume, 3899 .suspend = hotkey_suspend, 3900 .acpi = &ibm_hotkey_acpidriver, 3901 }; 3902 3903 /************************************************************************* 3904 * Bluetooth subdriver 3905 */ 3906 3907 enum { 3908 /* ACPI GBDC/SBDC bits */ 3909 TP_ACPI_BLUETOOTH_HWPRESENT = 0x01, /* Bluetooth hw available */ 3910 TP_ACPI_BLUETOOTH_RADIOSSW = 0x02, /* Bluetooth radio enabled */ 3911 TP_ACPI_BLUETOOTH_RESUMECTRL = 0x04, /* Bluetooth state at resume: 3912 0 = disable, 1 = enable */ 3913 }; 3914 3915 enum { 3916 /* ACPI \BLTH commands */ 3917 TP_ACPI_BLTH_GET_ULTRAPORT_ID = 0x00, /* Get Ultraport BT ID */ 3918 TP_ACPI_BLTH_GET_PWR_ON_RESUME = 0x01, /* Get power-on-resume state */ 3919 TP_ACPI_BLTH_PWR_ON_ON_RESUME = 0x02, /* Resume powered on */ 3920 TP_ACPI_BLTH_PWR_OFF_ON_RESUME = 0x03, /* Resume powered off */ 3921 TP_ACPI_BLTH_SAVE_STATE = 0x05, /* Save state for S4/S5 */ 3922 }; 3923 3924 #define TPACPI_RFK_BLUETOOTH_SW_NAME "tpacpi_bluetooth_sw" 3925 3926 static int bluetooth_get_status(void) 3927 { 3928 int status; 3929 3930 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3931 if (dbg_bluetoothemul) 3932 return (tpacpi_bluetooth_emulstate) ? 3933 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3934 #endif 3935 3936 if (!acpi_evalf(hkey_handle, &status, "GBDC", "d")) 3937 return -EIO; 3938 3939 return ((status & TP_ACPI_BLUETOOTH_RADIOSSW) != 0) ? 3940 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 3941 } 3942 3943 static int bluetooth_set_status(enum tpacpi_rfkill_state state) 3944 { 3945 int status; 3946 3947 vdbg_printk(TPACPI_DBG_RFKILL, 3948 "will attempt to %s bluetooth\n", 3949 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 3950 3951 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 3952 if (dbg_bluetoothemul) { 3953 tpacpi_bluetooth_emulstate = (state == TPACPI_RFK_RADIO_ON); 3954 return 0; 3955 } 3956 #endif 3957 3958 if (state == TPACPI_RFK_RADIO_ON) 3959 status = TP_ACPI_BLUETOOTH_RADIOSSW 3960 | TP_ACPI_BLUETOOTH_RESUMECTRL; 3961 else 3962 status = 0; 3963 3964 if (!acpi_evalf(hkey_handle, NULL, "SBDC", "vd", status)) 3965 return -EIO; 3966 3967 return 0; 3968 } 3969 3970 /* sysfs bluetooth enable ---------------------------------------------- */ 3971 static ssize_t bluetooth_enable_show(struct device *dev, 3972 struct device_attribute *attr, 3973 char *buf) 3974 { 3975 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_BLUETOOTH_SW_ID, 3976 attr, buf); 3977 } 3978 3979 static ssize_t bluetooth_enable_store(struct device *dev, 3980 struct device_attribute *attr, 3981 const char *buf, size_t count) 3982 { 3983 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_BLUETOOTH_SW_ID, 3984 attr, buf, count); 3985 } 3986 3987 static struct device_attribute dev_attr_bluetooth_enable = 3988 __ATTR(bluetooth_enable, S_IWUSR | S_IRUGO, 3989 bluetooth_enable_show, bluetooth_enable_store); 3990 3991 /* --------------------------------------------------------------------- */ 3992 3993 static struct attribute *bluetooth_attributes[] = { 3994 &dev_attr_bluetooth_enable.attr, 3995 NULL 3996 }; 3997 3998 static const struct attribute_group bluetooth_attr_group = { 3999 .attrs = bluetooth_attributes, 4000 }; 4001 4002 static const struct tpacpi_rfk_ops bluetooth_tprfk_ops = { 4003 .get_status = bluetooth_get_status, 4004 .set_status = bluetooth_set_status, 4005 }; 4006 4007 static void bluetooth_shutdown(void) 4008 { 4009 /* Order firmware to save current state to NVRAM */ 4010 if (!acpi_evalf(NULL, NULL, "\\BLTH", "vd", 4011 TP_ACPI_BLTH_SAVE_STATE)) 4012 printk(TPACPI_NOTICE 4013 "failed to save bluetooth state to NVRAM\n"); 4014 else 4015 vdbg_printk(TPACPI_DBG_RFKILL, 4016 "bluestooth state saved to NVRAM\n"); 4017 } 4018 4019 static void bluetooth_exit(void) 4020 { 4021 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4022 &bluetooth_attr_group); 4023 4024 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4025 4026 bluetooth_shutdown(); 4027 } 4028 4029 static int __init bluetooth_init(struct ibm_init_struct *iibm) 4030 { 4031 int res; 4032 int status = 0; 4033 4034 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4035 "initializing bluetooth subdriver\n"); 4036 4037 TPACPI_ACPIHANDLE_INIT(hkey); 4038 4039 /* bluetooth not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4040 G4x, R30, R31, R40e, R50e, T20-22, X20-21 */ 4041 tp_features.bluetooth = hkey_handle && 4042 acpi_evalf(hkey_handle, &status, "GBDC", "qd"); 4043 4044 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4045 "bluetooth is %s, status 0x%02x\n", 4046 str_supported(tp_features.bluetooth), 4047 status); 4048 4049 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4050 if (dbg_bluetoothemul) { 4051 tp_features.bluetooth = 1; 4052 printk(TPACPI_INFO 4053 "bluetooth switch emulation enabled\n"); 4054 } else 4055 #endif 4056 if (tp_features.bluetooth && 4057 !(status & TP_ACPI_BLUETOOTH_HWPRESENT)) { 4058 /* no bluetooth hardware present in system */ 4059 tp_features.bluetooth = 0; 4060 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4061 "bluetooth hardware not installed\n"); 4062 } 4063 4064 if (!tp_features.bluetooth) 4065 return 1; 4066 4067 res = tpacpi_new_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID, 4068 &bluetooth_tprfk_ops, 4069 RFKILL_TYPE_BLUETOOTH, 4070 TPACPI_RFK_BLUETOOTH_SW_NAME, 4071 true); 4072 if (res) 4073 return res; 4074 4075 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4076 &bluetooth_attr_group); 4077 if (res) { 4078 tpacpi_destroy_rfkill(TPACPI_RFK_BLUETOOTH_SW_ID); 4079 return res; 4080 } 4081 4082 return 0; 4083 } 4084 4085 /* procfs -------------------------------------------------------------- */ 4086 static int bluetooth_read(struct seq_file *m) 4087 { 4088 return tpacpi_rfk_procfs_read(TPACPI_RFK_BLUETOOTH_SW_ID, m); 4089 } 4090 4091 static int bluetooth_write(char *buf) 4092 { 4093 return tpacpi_rfk_procfs_write(TPACPI_RFK_BLUETOOTH_SW_ID, buf); 4094 } 4095 4096 static struct ibm_struct bluetooth_driver_data = { 4097 .name = "bluetooth", 4098 .read = bluetooth_read, 4099 .write = bluetooth_write, 4100 .exit = bluetooth_exit, 4101 .shutdown = bluetooth_shutdown, 4102 }; 4103 4104 /************************************************************************* 4105 * Wan subdriver 4106 */ 4107 4108 enum { 4109 /* ACPI GWAN/SWAN bits */ 4110 TP_ACPI_WANCARD_HWPRESENT = 0x01, /* Wan hw available */ 4111 TP_ACPI_WANCARD_RADIOSSW = 0x02, /* Wan radio enabled */ 4112 TP_ACPI_WANCARD_RESUMECTRL = 0x04, /* Wan state at resume: 4113 0 = disable, 1 = enable */ 4114 }; 4115 4116 #define TPACPI_RFK_WWAN_SW_NAME "tpacpi_wwan_sw" 4117 4118 static int wan_get_status(void) 4119 { 4120 int status; 4121 4122 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4123 if (dbg_wwanemul) 4124 return (tpacpi_wwan_emulstate) ? 4125 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4126 #endif 4127 4128 if (!acpi_evalf(hkey_handle, &status, "GWAN", "d")) 4129 return -EIO; 4130 4131 return ((status & TP_ACPI_WANCARD_RADIOSSW) != 0) ? 4132 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4133 } 4134 4135 static int wan_set_status(enum tpacpi_rfkill_state state) 4136 { 4137 int status; 4138 4139 vdbg_printk(TPACPI_DBG_RFKILL, 4140 "will attempt to %s wwan\n", 4141 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4142 4143 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4144 if (dbg_wwanemul) { 4145 tpacpi_wwan_emulstate = (state == TPACPI_RFK_RADIO_ON); 4146 return 0; 4147 } 4148 #endif 4149 4150 if (state == TPACPI_RFK_RADIO_ON) 4151 status = TP_ACPI_WANCARD_RADIOSSW 4152 | TP_ACPI_WANCARD_RESUMECTRL; 4153 else 4154 status = 0; 4155 4156 if (!acpi_evalf(hkey_handle, NULL, "SWAN", "vd", status)) 4157 return -EIO; 4158 4159 return 0; 4160 } 4161 4162 /* sysfs wan enable ---------------------------------------------------- */ 4163 static ssize_t wan_enable_show(struct device *dev, 4164 struct device_attribute *attr, 4165 char *buf) 4166 { 4167 return tpacpi_rfk_sysfs_enable_show(TPACPI_RFK_WWAN_SW_ID, 4168 attr, buf); 4169 } 4170 4171 static ssize_t wan_enable_store(struct device *dev, 4172 struct device_attribute *attr, 4173 const char *buf, size_t count) 4174 { 4175 return tpacpi_rfk_sysfs_enable_store(TPACPI_RFK_WWAN_SW_ID, 4176 attr, buf, count); 4177 } 4178 4179 static struct device_attribute dev_attr_wan_enable = 4180 __ATTR(wwan_enable, S_IWUSR | S_IRUGO, 4181 wan_enable_show, wan_enable_store); 4182 4183 /* --------------------------------------------------------------------- */ 4184 4185 static struct attribute *wan_attributes[] = { 4186 &dev_attr_wan_enable.attr, 4187 NULL 4188 }; 4189 4190 static const struct attribute_group wan_attr_group = { 4191 .attrs = wan_attributes, 4192 }; 4193 4194 static const struct tpacpi_rfk_ops wan_tprfk_ops = { 4195 .get_status = wan_get_status, 4196 .set_status = wan_set_status, 4197 }; 4198 4199 static void wan_shutdown(void) 4200 { 4201 /* Order firmware to save current state to NVRAM */ 4202 if (!acpi_evalf(NULL, NULL, "\\WGSV", "vd", 4203 TP_ACPI_WGSV_SAVE_STATE)) 4204 printk(TPACPI_NOTICE 4205 "failed to save WWAN state to NVRAM\n"); 4206 else 4207 vdbg_printk(TPACPI_DBG_RFKILL, 4208 "WWAN state saved to NVRAM\n"); 4209 } 4210 4211 static void wan_exit(void) 4212 { 4213 sysfs_remove_group(&tpacpi_pdev->dev.kobj, 4214 &wan_attr_group); 4215 4216 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4217 4218 wan_shutdown(); 4219 } 4220 4221 static int __init wan_init(struct ibm_init_struct *iibm) 4222 { 4223 int res; 4224 int status = 0; 4225 4226 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4227 "initializing wan subdriver\n"); 4228 4229 TPACPI_ACPIHANDLE_INIT(hkey); 4230 4231 tp_features.wan = hkey_handle && 4232 acpi_evalf(hkey_handle, &status, "GWAN", "qd"); 4233 4234 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4235 "wan is %s, status 0x%02x\n", 4236 str_supported(tp_features.wan), 4237 status); 4238 4239 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4240 if (dbg_wwanemul) { 4241 tp_features.wan = 1; 4242 printk(TPACPI_INFO 4243 "wwan switch emulation enabled\n"); 4244 } else 4245 #endif 4246 if (tp_features.wan && 4247 !(status & TP_ACPI_WANCARD_HWPRESENT)) { 4248 /* no wan hardware present in system */ 4249 tp_features.wan = 0; 4250 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4251 "wan hardware not installed\n"); 4252 } 4253 4254 if (!tp_features.wan) 4255 return 1; 4256 4257 res = tpacpi_new_rfkill(TPACPI_RFK_WWAN_SW_ID, 4258 &wan_tprfk_ops, 4259 RFKILL_TYPE_WWAN, 4260 TPACPI_RFK_WWAN_SW_NAME, 4261 true); 4262 if (res) 4263 return res; 4264 4265 res = sysfs_create_group(&tpacpi_pdev->dev.kobj, 4266 &wan_attr_group); 4267 4268 if (res) { 4269 tpacpi_destroy_rfkill(TPACPI_RFK_WWAN_SW_ID); 4270 return res; 4271 } 4272 4273 return 0; 4274 } 4275 4276 /* procfs -------------------------------------------------------------- */ 4277 static int wan_read(struct seq_file *m) 4278 { 4279 return tpacpi_rfk_procfs_read(TPACPI_RFK_WWAN_SW_ID, m); 4280 } 4281 4282 static int wan_write(char *buf) 4283 { 4284 return tpacpi_rfk_procfs_write(TPACPI_RFK_WWAN_SW_ID, buf); 4285 } 4286 4287 static struct ibm_struct wan_driver_data = { 4288 .name = "wan", 4289 .read = wan_read, 4290 .write = wan_write, 4291 .exit = wan_exit, 4292 .shutdown = wan_shutdown, 4293 }; 4294 4295 /************************************************************************* 4296 * UWB subdriver 4297 */ 4298 4299 enum { 4300 /* ACPI GUWB/SUWB bits */ 4301 TP_ACPI_UWB_HWPRESENT = 0x01, /* UWB hw available */ 4302 TP_ACPI_UWB_RADIOSSW = 0x02, /* UWB radio enabled */ 4303 }; 4304 4305 #define TPACPI_RFK_UWB_SW_NAME "tpacpi_uwb_sw" 4306 4307 static int uwb_get_status(void) 4308 { 4309 int status; 4310 4311 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4312 if (dbg_uwbemul) 4313 return (tpacpi_uwb_emulstate) ? 4314 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4315 #endif 4316 4317 if (!acpi_evalf(hkey_handle, &status, "GUWB", "d")) 4318 return -EIO; 4319 4320 return ((status & TP_ACPI_UWB_RADIOSSW) != 0) ? 4321 TPACPI_RFK_RADIO_ON : TPACPI_RFK_RADIO_OFF; 4322 } 4323 4324 static int uwb_set_status(enum tpacpi_rfkill_state state) 4325 { 4326 int status; 4327 4328 vdbg_printk(TPACPI_DBG_RFKILL, 4329 "will attempt to %s UWB\n", 4330 (state == TPACPI_RFK_RADIO_ON) ? "enable" : "disable"); 4331 4332 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4333 if (dbg_uwbemul) { 4334 tpacpi_uwb_emulstate = (state == TPACPI_RFK_RADIO_ON); 4335 return 0; 4336 } 4337 #endif 4338 4339 if (state == TPACPI_RFK_RADIO_ON) 4340 status = TP_ACPI_UWB_RADIOSSW; 4341 else 4342 status = 0; 4343 4344 if (!acpi_evalf(hkey_handle, NULL, "SUWB", "vd", status)) 4345 return -EIO; 4346 4347 return 0; 4348 } 4349 4350 /* --------------------------------------------------------------------- */ 4351 4352 static const struct tpacpi_rfk_ops uwb_tprfk_ops = { 4353 .get_status = uwb_get_status, 4354 .set_status = uwb_set_status, 4355 }; 4356 4357 static void uwb_exit(void) 4358 { 4359 tpacpi_destroy_rfkill(TPACPI_RFK_UWB_SW_ID); 4360 } 4361 4362 static int __init uwb_init(struct ibm_init_struct *iibm) 4363 { 4364 int res; 4365 int status = 0; 4366 4367 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4368 "initializing uwb subdriver\n"); 4369 4370 TPACPI_ACPIHANDLE_INIT(hkey); 4371 4372 tp_features.uwb = hkey_handle && 4373 acpi_evalf(hkey_handle, &status, "GUWB", "qd"); 4374 4375 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_RFKILL, 4376 "uwb is %s, status 0x%02x\n", 4377 str_supported(tp_features.uwb), 4378 status); 4379 4380 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 4381 if (dbg_uwbemul) { 4382 tp_features.uwb = 1; 4383 printk(TPACPI_INFO 4384 "uwb switch emulation enabled\n"); 4385 } else 4386 #endif 4387 if (tp_features.uwb && 4388 !(status & TP_ACPI_UWB_HWPRESENT)) { 4389 /* no uwb hardware present in system */ 4390 tp_features.uwb = 0; 4391 dbg_printk(TPACPI_DBG_INIT, 4392 "uwb hardware not installed\n"); 4393 } 4394 4395 if (!tp_features.uwb) 4396 return 1; 4397 4398 res = tpacpi_new_rfkill(TPACPI_RFK_UWB_SW_ID, 4399 &uwb_tprfk_ops, 4400 RFKILL_TYPE_UWB, 4401 TPACPI_RFK_UWB_SW_NAME, 4402 false); 4403 return res; 4404 } 4405 4406 static struct ibm_struct uwb_driver_data = { 4407 .name = "uwb", 4408 .exit = uwb_exit, 4409 .flags.experimental = 1, 4410 }; 4411 4412 /************************************************************************* 4413 * Video subdriver 4414 */ 4415 4416 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 4417 4418 enum video_access_mode { 4419 TPACPI_VIDEO_NONE = 0, 4420 TPACPI_VIDEO_570, /* 570 */ 4421 TPACPI_VIDEO_770, /* 600e/x, 770e, 770x */ 4422 TPACPI_VIDEO_NEW, /* all others */ 4423 }; 4424 4425 enum { /* video status flags, based on VIDEO_570 */ 4426 TP_ACPI_VIDEO_S_LCD = 0x01, /* LCD output enabled */ 4427 TP_ACPI_VIDEO_S_CRT = 0x02, /* CRT output enabled */ 4428 TP_ACPI_VIDEO_S_DVI = 0x08, /* DVI output enabled */ 4429 }; 4430 4431 enum { /* TPACPI_VIDEO_570 constants */ 4432 TP_ACPI_VIDEO_570_PHSCMD = 0x87, /* unknown magic constant :( */ 4433 TP_ACPI_VIDEO_570_PHSMASK = 0x03, /* PHS bits that map to 4434 * video_status_flags */ 4435 TP_ACPI_VIDEO_570_PHS2CMD = 0x8b, /* unknown magic constant :( */ 4436 TP_ACPI_VIDEO_570_PHS2SET = 0x80, /* unknown magic constant :( */ 4437 }; 4438 4439 static enum video_access_mode video_supported; 4440 static int video_orig_autosw; 4441 4442 static int video_autosw_get(void); 4443 static int video_autosw_set(int enable); 4444 4445 TPACPI_HANDLE(vid2, root, "\\_SB.PCI0.AGPB.VID"); /* G41 */ 4446 4447 static int __init video_init(struct ibm_init_struct *iibm) 4448 { 4449 int ivga; 4450 4451 vdbg_printk(TPACPI_DBG_INIT, "initializing video subdriver\n"); 4452 4453 TPACPI_ACPIHANDLE_INIT(vid); 4454 if (tpacpi_is_ibm()) 4455 TPACPI_ACPIHANDLE_INIT(vid2); 4456 4457 if (vid2_handle && acpi_evalf(NULL, &ivga, "\\IVGA", "d") && ivga) 4458 /* G41, assume IVGA doesn't change */ 4459 vid_handle = vid2_handle; 4460 4461 if (!vid_handle) 4462 /* video switching not supported on R30, R31 */ 4463 video_supported = TPACPI_VIDEO_NONE; 4464 else if (tpacpi_is_ibm() && 4465 acpi_evalf(vid_handle, &video_orig_autosw, "SWIT", "qd")) 4466 /* 570 */ 4467 video_supported = TPACPI_VIDEO_570; 4468 else if (tpacpi_is_ibm() && 4469 acpi_evalf(vid_handle, &video_orig_autosw, "^VADL", "qd")) 4470 /* 600e/x, 770e, 770x */ 4471 video_supported = TPACPI_VIDEO_770; 4472 else 4473 /* all others */ 4474 video_supported = TPACPI_VIDEO_NEW; 4475 4476 vdbg_printk(TPACPI_DBG_INIT, "video is %s, mode %d\n", 4477 str_supported(video_supported != TPACPI_VIDEO_NONE), 4478 video_supported); 4479 4480 return (video_supported != TPACPI_VIDEO_NONE)? 0 : 1; 4481 } 4482 4483 static void video_exit(void) 4484 { 4485 dbg_printk(TPACPI_DBG_EXIT, 4486 "restoring original video autoswitch mode\n"); 4487 if (video_autosw_set(video_orig_autosw)) 4488 printk(TPACPI_ERR "error while trying to restore original " 4489 "video autoswitch mode\n"); 4490 } 4491 4492 static int video_outputsw_get(void) 4493 { 4494 int status = 0; 4495 int i; 4496 4497 switch (video_supported) { 4498 case TPACPI_VIDEO_570: 4499 if (!acpi_evalf(NULL, &i, "\\_SB.PHS", "dd", 4500 TP_ACPI_VIDEO_570_PHSCMD)) 4501 return -EIO; 4502 status = i & TP_ACPI_VIDEO_570_PHSMASK; 4503 break; 4504 case TPACPI_VIDEO_770: 4505 if (!acpi_evalf(NULL, &i, "\\VCDL", "d")) 4506 return -EIO; 4507 if (i) 4508 status |= TP_ACPI_VIDEO_S_LCD; 4509 if (!acpi_evalf(NULL, &i, "\\VCDC", "d")) 4510 return -EIO; 4511 if (i) 4512 status |= TP_ACPI_VIDEO_S_CRT; 4513 break; 4514 case TPACPI_VIDEO_NEW: 4515 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 1) || 4516 !acpi_evalf(NULL, &i, "\\VCDC", "d")) 4517 return -EIO; 4518 if (i) 4519 status |= TP_ACPI_VIDEO_S_CRT; 4520 4521 if (!acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0) || 4522 !acpi_evalf(NULL, &i, "\\VCDL", "d")) 4523 return -EIO; 4524 if (i) 4525 status |= TP_ACPI_VIDEO_S_LCD; 4526 if (!acpi_evalf(NULL, &i, "\\VCDD", "d")) 4527 return -EIO; 4528 if (i) 4529 status |= TP_ACPI_VIDEO_S_DVI; 4530 break; 4531 default: 4532 return -ENOSYS; 4533 } 4534 4535 return status; 4536 } 4537 4538 static int video_outputsw_set(int status) 4539 { 4540 int autosw; 4541 int res = 0; 4542 4543 switch (video_supported) { 4544 case TPACPI_VIDEO_570: 4545 res = acpi_evalf(NULL, NULL, 4546 "\\_SB.PHS2", "vdd", 4547 TP_ACPI_VIDEO_570_PHS2CMD, 4548 status | TP_ACPI_VIDEO_570_PHS2SET); 4549 break; 4550 case TPACPI_VIDEO_770: 4551 autosw = video_autosw_get(); 4552 if (autosw < 0) 4553 return autosw; 4554 4555 res = video_autosw_set(1); 4556 if (res) 4557 return res; 4558 res = acpi_evalf(vid_handle, NULL, 4559 "ASWT", "vdd", status * 0x100, 0); 4560 if (!autosw && video_autosw_set(autosw)) { 4561 printk(TPACPI_ERR 4562 "video auto-switch left enabled due to error\n"); 4563 return -EIO; 4564 } 4565 break; 4566 case TPACPI_VIDEO_NEW: 4567 res = acpi_evalf(NULL, NULL, "\\VUPS", "vd", 0x80) && 4568 acpi_evalf(NULL, NULL, "\\VSDS", "vdd", status, 1); 4569 break; 4570 default: 4571 return -ENOSYS; 4572 } 4573 4574 return (res)? 0 : -EIO; 4575 } 4576 4577 static int video_autosw_get(void) 4578 { 4579 int autosw = 0; 4580 4581 switch (video_supported) { 4582 case TPACPI_VIDEO_570: 4583 if (!acpi_evalf(vid_handle, &autosw, "SWIT", "d")) 4584 return -EIO; 4585 break; 4586 case TPACPI_VIDEO_770: 4587 case TPACPI_VIDEO_NEW: 4588 if (!acpi_evalf(vid_handle, &autosw, "^VDEE", "d")) 4589 return -EIO; 4590 break; 4591 default: 4592 return -ENOSYS; 4593 } 4594 4595 return autosw & 1; 4596 } 4597 4598 static int video_autosw_set(int enable) 4599 { 4600 if (!acpi_evalf(vid_handle, NULL, "_DOS", "vd", (enable)? 1 : 0)) 4601 return -EIO; 4602 return 0; 4603 } 4604 4605 static int video_outputsw_cycle(void) 4606 { 4607 int autosw = video_autosw_get(); 4608 int res; 4609 4610 if (autosw < 0) 4611 return autosw; 4612 4613 switch (video_supported) { 4614 case TPACPI_VIDEO_570: 4615 res = video_autosw_set(1); 4616 if (res) 4617 return res; 4618 res = acpi_evalf(ec_handle, NULL, "_Q16", "v"); 4619 break; 4620 case TPACPI_VIDEO_770: 4621 case TPACPI_VIDEO_NEW: 4622 res = video_autosw_set(1); 4623 if (res) 4624 return res; 4625 res = acpi_evalf(vid_handle, NULL, "VSWT", "v"); 4626 break; 4627 default: 4628 return -ENOSYS; 4629 } 4630 if (!autosw && video_autosw_set(autosw)) { 4631 printk(TPACPI_ERR 4632 "video auto-switch left enabled due to error\n"); 4633 return -EIO; 4634 } 4635 4636 return (res)? 0 : -EIO; 4637 } 4638 4639 static int video_expand_toggle(void) 4640 { 4641 switch (video_supported) { 4642 case TPACPI_VIDEO_570: 4643 return acpi_evalf(ec_handle, NULL, "_Q17", "v")? 4644 0 : -EIO; 4645 case TPACPI_VIDEO_770: 4646 return acpi_evalf(vid_handle, NULL, "VEXP", "v")? 4647 0 : -EIO; 4648 case TPACPI_VIDEO_NEW: 4649 return acpi_evalf(NULL, NULL, "\\VEXP", "v")? 4650 0 : -EIO; 4651 default: 4652 return -ENOSYS; 4653 } 4654 /* not reached */ 4655 } 4656 4657 static int video_read(struct seq_file *m) 4658 { 4659 int status, autosw; 4660 4661 if (video_supported == TPACPI_VIDEO_NONE) { 4662 seq_printf(m, "status:\t\tnot supported\n"); 4663 return 0; 4664 } 4665 4666 /* Even reads can crash X.org, so... */ 4667 if (!capable(CAP_SYS_ADMIN)) 4668 return -EPERM; 4669 4670 status = video_outputsw_get(); 4671 if (status < 0) 4672 return status; 4673 4674 autosw = video_autosw_get(); 4675 if (autosw < 0) 4676 return autosw; 4677 4678 seq_printf(m, "status:\t\tsupported\n"); 4679 seq_printf(m, "lcd:\t\t%s\n", enabled(status, 0)); 4680 seq_printf(m, "crt:\t\t%s\n", enabled(status, 1)); 4681 if (video_supported == TPACPI_VIDEO_NEW) 4682 seq_printf(m, "dvi:\t\t%s\n", enabled(status, 3)); 4683 seq_printf(m, "auto:\t\t%s\n", enabled(autosw, 0)); 4684 seq_printf(m, "commands:\tlcd_enable, lcd_disable\n"); 4685 seq_printf(m, "commands:\tcrt_enable, crt_disable\n"); 4686 if (video_supported == TPACPI_VIDEO_NEW) 4687 seq_printf(m, "commands:\tdvi_enable, dvi_disable\n"); 4688 seq_printf(m, "commands:\tauto_enable, auto_disable\n"); 4689 seq_printf(m, "commands:\tvideo_switch, expand_toggle\n"); 4690 4691 return 0; 4692 } 4693 4694 static int video_write(char *buf) 4695 { 4696 char *cmd; 4697 int enable, disable, status; 4698 int res; 4699 4700 if (video_supported == TPACPI_VIDEO_NONE) 4701 return -ENODEV; 4702 4703 /* Even reads can crash X.org, let alone writes... */ 4704 if (!capable(CAP_SYS_ADMIN)) 4705 return -EPERM; 4706 4707 enable = 0; 4708 disable = 0; 4709 4710 while ((cmd = next_cmd(&buf))) { 4711 if (strlencmp(cmd, "lcd_enable") == 0) { 4712 enable |= TP_ACPI_VIDEO_S_LCD; 4713 } else if (strlencmp(cmd, "lcd_disable") == 0) { 4714 disable |= TP_ACPI_VIDEO_S_LCD; 4715 } else if (strlencmp(cmd, "crt_enable") == 0) { 4716 enable |= TP_ACPI_VIDEO_S_CRT; 4717 } else if (strlencmp(cmd, "crt_disable") == 0) { 4718 disable |= TP_ACPI_VIDEO_S_CRT; 4719 } else if (video_supported == TPACPI_VIDEO_NEW && 4720 strlencmp(cmd, "dvi_enable") == 0) { 4721 enable |= TP_ACPI_VIDEO_S_DVI; 4722 } else if (video_supported == TPACPI_VIDEO_NEW && 4723 strlencmp(cmd, "dvi_disable") == 0) { 4724 disable |= TP_ACPI_VIDEO_S_DVI; 4725 } else if (strlencmp(cmd, "auto_enable") == 0) { 4726 res = video_autosw_set(1); 4727 if (res) 4728 return res; 4729 } else if (strlencmp(cmd, "auto_disable") == 0) { 4730 res = video_autosw_set(0); 4731 if (res) 4732 return res; 4733 } else if (strlencmp(cmd, "video_switch") == 0) { 4734 res = video_outputsw_cycle(); 4735 if (res) 4736 return res; 4737 } else if (strlencmp(cmd, "expand_toggle") == 0) { 4738 res = video_expand_toggle(); 4739 if (res) 4740 return res; 4741 } else 4742 return -EINVAL; 4743 } 4744 4745 if (enable || disable) { 4746 status = video_outputsw_get(); 4747 if (status < 0) 4748 return status; 4749 res = video_outputsw_set((status & ~disable) | enable); 4750 if (res) 4751 return res; 4752 } 4753 4754 return 0; 4755 } 4756 4757 static struct ibm_struct video_driver_data = { 4758 .name = "video", 4759 .read = video_read, 4760 .write = video_write, 4761 .exit = video_exit, 4762 }; 4763 4764 #endif /* CONFIG_THINKPAD_ACPI_VIDEO */ 4765 4766 /************************************************************************* 4767 * Light (thinklight) subdriver 4768 */ 4769 4770 TPACPI_HANDLE(lght, root, "\\LGHT"); /* A21e, A2xm/p, T20-22, X20-21 */ 4771 TPACPI_HANDLE(ledb, ec, "LEDB"); /* G4x */ 4772 4773 static int light_get_status(void) 4774 { 4775 int status = 0; 4776 4777 if (tp_features.light_status) { 4778 if (!acpi_evalf(ec_handle, &status, "KBLT", "d")) 4779 return -EIO; 4780 return (!!status); 4781 } 4782 4783 return -ENXIO; 4784 } 4785 4786 static int light_set_status(int status) 4787 { 4788 int rc; 4789 4790 if (tp_features.light) { 4791 if (cmos_handle) { 4792 rc = acpi_evalf(cmos_handle, NULL, NULL, "vd", 4793 (status)? 4794 TP_CMOS_THINKLIGHT_ON : 4795 TP_CMOS_THINKLIGHT_OFF); 4796 } else { 4797 rc = acpi_evalf(lght_handle, NULL, NULL, "vd", 4798 (status)? 1 : 0); 4799 } 4800 return (rc)? 0 : -EIO; 4801 } 4802 4803 return -ENXIO; 4804 } 4805 4806 static void light_set_status_worker(struct work_struct *work) 4807 { 4808 struct tpacpi_led_classdev *data = 4809 container_of(work, struct tpacpi_led_classdev, work); 4810 4811 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 4812 light_set_status((data->new_state != TPACPI_LED_OFF)); 4813 } 4814 4815 static void light_sysfs_set(struct led_classdev *led_cdev, 4816 enum led_brightness brightness) 4817 { 4818 struct tpacpi_led_classdev *data = 4819 container_of(led_cdev, 4820 struct tpacpi_led_classdev, 4821 led_classdev); 4822 data->new_state = (brightness != LED_OFF) ? 4823 TPACPI_LED_ON : TPACPI_LED_OFF; 4824 queue_work(tpacpi_wq, &data->work); 4825 } 4826 4827 static enum led_brightness light_sysfs_get(struct led_classdev *led_cdev) 4828 { 4829 return (light_get_status() == 1)? LED_FULL : LED_OFF; 4830 } 4831 4832 static struct tpacpi_led_classdev tpacpi_led_thinklight = { 4833 .led_classdev = { 4834 .name = "tpacpi::thinklight", 4835 .brightness_set = &light_sysfs_set, 4836 .brightness_get = &light_sysfs_get, 4837 } 4838 }; 4839 4840 static int __init light_init(struct ibm_init_struct *iibm) 4841 { 4842 int rc; 4843 4844 vdbg_printk(TPACPI_DBG_INIT, "initializing light subdriver\n"); 4845 4846 if (tpacpi_is_ibm()) { 4847 TPACPI_ACPIHANDLE_INIT(ledb); 4848 TPACPI_ACPIHANDLE_INIT(lght); 4849 } 4850 TPACPI_ACPIHANDLE_INIT(cmos); 4851 INIT_WORK(&tpacpi_led_thinklight.work, light_set_status_worker); 4852 4853 /* light not supported on 570, 600e/x, 770e, 770x, G4x, R30, R31 */ 4854 tp_features.light = (cmos_handle || lght_handle) && !ledb_handle; 4855 4856 if (tp_features.light) 4857 /* light status not supported on 4858 570, 600e/x, 770e, 770x, G4x, R30, R31, R32, X20 */ 4859 tp_features.light_status = 4860 acpi_evalf(ec_handle, NULL, "KBLT", "qv"); 4861 4862 vdbg_printk(TPACPI_DBG_INIT, "light is %s, light status is %s\n", 4863 str_supported(tp_features.light), 4864 str_supported(tp_features.light_status)); 4865 4866 if (!tp_features.light) 4867 return 1; 4868 4869 rc = led_classdev_register(&tpacpi_pdev->dev, 4870 &tpacpi_led_thinklight.led_classdev); 4871 4872 if (rc < 0) { 4873 tp_features.light = 0; 4874 tp_features.light_status = 0; 4875 } else { 4876 rc = 0; 4877 } 4878 4879 return rc; 4880 } 4881 4882 static void light_exit(void) 4883 { 4884 led_classdev_unregister(&tpacpi_led_thinklight.led_classdev); 4885 if (work_pending(&tpacpi_led_thinklight.work)) 4886 flush_workqueue(tpacpi_wq); 4887 } 4888 4889 static int light_read(struct seq_file *m) 4890 { 4891 int status; 4892 4893 if (!tp_features.light) { 4894 seq_printf(m, "status:\t\tnot supported\n"); 4895 } else if (!tp_features.light_status) { 4896 seq_printf(m, "status:\t\tunknown\n"); 4897 seq_printf(m, "commands:\ton, off\n"); 4898 } else { 4899 status = light_get_status(); 4900 if (status < 0) 4901 return status; 4902 seq_printf(m, "status:\t\t%s\n", onoff(status, 0)); 4903 seq_printf(m, "commands:\ton, off\n"); 4904 } 4905 4906 return 0; 4907 } 4908 4909 static int light_write(char *buf) 4910 { 4911 char *cmd; 4912 int newstatus = 0; 4913 4914 if (!tp_features.light) 4915 return -ENODEV; 4916 4917 while ((cmd = next_cmd(&buf))) { 4918 if (strlencmp(cmd, "on") == 0) { 4919 newstatus = 1; 4920 } else if (strlencmp(cmd, "off") == 0) { 4921 newstatus = 0; 4922 } else 4923 return -EINVAL; 4924 } 4925 4926 return light_set_status(newstatus); 4927 } 4928 4929 static struct ibm_struct light_driver_data = { 4930 .name = "light", 4931 .read = light_read, 4932 .write = light_write, 4933 .exit = light_exit, 4934 }; 4935 4936 /************************************************************************* 4937 * CMOS subdriver 4938 */ 4939 4940 /* sysfs cmos_command -------------------------------------------------- */ 4941 static ssize_t cmos_command_store(struct device *dev, 4942 struct device_attribute *attr, 4943 const char *buf, size_t count) 4944 { 4945 unsigned long cmos_cmd; 4946 int res; 4947 4948 if (parse_strtoul(buf, 21, &cmos_cmd)) 4949 return -EINVAL; 4950 4951 res = issue_thinkpad_cmos_command(cmos_cmd); 4952 return (res)? res : count; 4953 } 4954 4955 static struct device_attribute dev_attr_cmos_command = 4956 __ATTR(cmos_command, S_IWUSR, NULL, cmos_command_store); 4957 4958 /* --------------------------------------------------------------------- */ 4959 4960 static int __init cmos_init(struct ibm_init_struct *iibm) 4961 { 4962 int res; 4963 4964 vdbg_printk(TPACPI_DBG_INIT, 4965 "initializing cmos commands subdriver\n"); 4966 4967 TPACPI_ACPIHANDLE_INIT(cmos); 4968 4969 vdbg_printk(TPACPI_DBG_INIT, "cmos commands are %s\n", 4970 str_supported(cmos_handle != NULL)); 4971 4972 res = device_create_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4973 if (res) 4974 return res; 4975 4976 return (cmos_handle)? 0 : 1; 4977 } 4978 4979 static void cmos_exit(void) 4980 { 4981 device_remove_file(&tpacpi_pdev->dev, &dev_attr_cmos_command); 4982 } 4983 4984 static int cmos_read(struct seq_file *m) 4985 { 4986 /* cmos not supported on 570, 600e/x, 770e, 770x, A21e, A2xm/p, 4987 R30, R31, T20-22, X20-21 */ 4988 if (!cmos_handle) 4989 seq_printf(m, "status:\t\tnot supported\n"); 4990 else { 4991 seq_printf(m, "status:\t\tsupported\n"); 4992 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-21)\n"); 4993 } 4994 4995 return 0; 4996 } 4997 4998 static int cmos_write(char *buf) 4999 { 5000 char *cmd; 5001 int cmos_cmd, res; 5002 5003 while ((cmd = next_cmd(&buf))) { 5004 if (sscanf(cmd, "%u", &cmos_cmd) == 1 && 5005 cmos_cmd >= 0 && cmos_cmd <= 21) { 5006 /* cmos_cmd set */ 5007 } else 5008 return -EINVAL; 5009 5010 res = issue_thinkpad_cmos_command(cmos_cmd); 5011 if (res) 5012 return res; 5013 } 5014 5015 return 0; 5016 } 5017 5018 static struct ibm_struct cmos_driver_data = { 5019 .name = "cmos", 5020 .read = cmos_read, 5021 .write = cmos_write, 5022 .exit = cmos_exit, 5023 }; 5024 5025 /************************************************************************* 5026 * LED subdriver 5027 */ 5028 5029 enum led_access_mode { 5030 TPACPI_LED_NONE = 0, 5031 TPACPI_LED_570, /* 570 */ 5032 TPACPI_LED_OLD, /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5033 TPACPI_LED_NEW, /* all others */ 5034 }; 5035 5036 enum { /* For TPACPI_LED_OLD */ 5037 TPACPI_LED_EC_HLCL = 0x0c, /* EC reg to get led to power on */ 5038 TPACPI_LED_EC_HLBL = 0x0d, /* EC reg to blink a lit led */ 5039 TPACPI_LED_EC_HLMS = 0x0e, /* EC reg to select led to command */ 5040 }; 5041 5042 static enum led_access_mode led_supported; 5043 5044 static acpi_handle led_handle; 5045 5046 #define TPACPI_LED_NUMLEDS 16 5047 static struct tpacpi_led_classdev *tpacpi_leds; 5048 static enum led_status_t tpacpi_led_state_cache[TPACPI_LED_NUMLEDS]; 5049 static const char * const tpacpi_led_names[TPACPI_LED_NUMLEDS] = { 5050 /* there's a limit of 19 chars + NULL before 2.6.26 */ 5051 "tpacpi::power", 5052 "tpacpi:orange:batt", 5053 "tpacpi:green:batt", 5054 "tpacpi::dock_active", 5055 "tpacpi::bay_active", 5056 "tpacpi::dock_batt", 5057 "tpacpi::unknown_led", 5058 "tpacpi::standby", 5059 "tpacpi::dock_status1", 5060 "tpacpi::dock_status2", 5061 "tpacpi::unknown_led2", 5062 "tpacpi::unknown_led3", 5063 "tpacpi::thinkvantage", 5064 }; 5065 #define TPACPI_SAFE_LEDS 0x1081U 5066 5067 static inline bool tpacpi_is_led_restricted(const unsigned int led) 5068 { 5069 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5070 return false; 5071 #else 5072 return (1U & (TPACPI_SAFE_LEDS >> led)) == 0; 5073 #endif 5074 } 5075 5076 static int led_get_status(const unsigned int led) 5077 { 5078 int status; 5079 enum led_status_t led_s; 5080 5081 switch (led_supported) { 5082 case TPACPI_LED_570: 5083 if (!acpi_evalf(ec_handle, 5084 &status, "GLED", "dd", 1 << led)) 5085 return -EIO; 5086 led_s = (status == 0)? 5087 TPACPI_LED_OFF : 5088 ((status == 1)? 5089 TPACPI_LED_ON : 5090 TPACPI_LED_BLINK); 5091 tpacpi_led_state_cache[led] = led_s; 5092 return led_s; 5093 default: 5094 return -ENXIO; 5095 } 5096 5097 /* not reached */ 5098 } 5099 5100 static int led_set_status(const unsigned int led, 5101 const enum led_status_t ledstatus) 5102 { 5103 /* off, on, blink. Index is led_status_t */ 5104 static const unsigned int led_sled_arg1[] = { 0, 1, 3 }; 5105 static const unsigned int led_led_arg1[] = { 0, 0x80, 0xc0 }; 5106 5107 int rc = 0; 5108 5109 switch (led_supported) { 5110 case TPACPI_LED_570: 5111 /* 570 */ 5112 if (unlikely(led > 7)) 5113 return -EINVAL; 5114 if (unlikely(tpacpi_is_led_restricted(led))) 5115 return -EPERM; 5116 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5117 (1 << led), led_sled_arg1[ledstatus])) 5118 rc = -EIO; 5119 break; 5120 case TPACPI_LED_OLD: 5121 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */ 5122 if (unlikely(led > 7)) 5123 return -EINVAL; 5124 if (unlikely(tpacpi_is_led_restricted(led))) 5125 return -EPERM; 5126 rc = ec_write(TPACPI_LED_EC_HLMS, (1 << led)); 5127 if (rc >= 0) 5128 rc = ec_write(TPACPI_LED_EC_HLBL, 5129 (ledstatus == TPACPI_LED_BLINK) << led); 5130 if (rc >= 0) 5131 rc = ec_write(TPACPI_LED_EC_HLCL, 5132 (ledstatus != TPACPI_LED_OFF) << led); 5133 break; 5134 case TPACPI_LED_NEW: 5135 /* all others */ 5136 if (unlikely(led >= TPACPI_LED_NUMLEDS)) 5137 return -EINVAL; 5138 if (unlikely(tpacpi_is_led_restricted(led))) 5139 return -EPERM; 5140 if (!acpi_evalf(led_handle, NULL, NULL, "vdd", 5141 led, led_led_arg1[ledstatus])) 5142 rc = -EIO; 5143 break; 5144 default: 5145 rc = -ENXIO; 5146 } 5147 5148 if (!rc) 5149 tpacpi_led_state_cache[led] = ledstatus; 5150 5151 return rc; 5152 } 5153 5154 static void led_set_status_worker(struct work_struct *work) 5155 { 5156 struct tpacpi_led_classdev *data = 5157 container_of(work, struct tpacpi_led_classdev, work); 5158 5159 if (likely(tpacpi_lifecycle == TPACPI_LIFE_RUNNING)) 5160 led_set_status(data->led, data->new_state); 5161 } 5162 5163 static void led_sysfs_set(struct led_classdev *led_cdev, 5164 enum led_brightness brightness) 5165 { 5166 struct tpacpi_led_classdev *data = container_of(led_cdev, 5167 struct tpacpi_led_classdev, led_classdev); 5168 5169 if (brightness == LED_OFF) 5170 data->new_state = TPACPI_LED_OFF; 5171 else if (tpacpi_led_state_cache[data->led] != TPACPI_LED_BLINK) 5172 data->new_state = TPACPI_LED_ON; 5173 else 5174 data->new_state = TPACPI_LED_BLINK; 5175 5176 queue_work(tpacpi_wq, &data->work); 5177 } 5178 5179 static int led_sysfs_blink_set(struct led_classdev *led_cdev, 5180 unsigned long *delay_on, unsigned long *delay_off) 5181 { 5182 struct tpacpi_led_classdev *data = container_of(led_cdev, 5183 struct tpacpi_led_classdev, led_classdev); 5184 5185 /* Can we choose the flash rate? */ 5186 if (*delay_on == 0 && *delay_off == 0) { 5187 /* yes. set them to the hardware blink rate (1 Hz) */ 5188 *delay_on = 500; /* ms */ 5189 *delay_off = 500; /* ms */ 5190 } else if ((*delay_on != 500) || (*delay_off != 500)) 5191 return -EINVAL; 5192 5193 data->new_state = TPACPI_LED_BLINK; 5194 queue_work(tpacpi_wq, &data->work); 5195 5196 return 0; 5197 } 5198 5199 static enum led_brightness led_sysfs_get(struct led_classdev *led_cdev) 5200 { 5201 int rc; 5202 5203 struct tpacpi_led_classdev *data = container_of(led_cdev, 5204 struct tpacpi_led_classdev, led_classdev); 5205 5206 rc = led_get_status(data->led); 5207 5208 if (rc == TPACPI_LED_OFF || rc < 0) 5209 rc = LED_OFF; /* no error handling in led class :( */ 5210 else 5211 rc = LED_FULL; 5212 5213 return rc; 5214 } 5215 5216 static void led_exit(void) 5217 { 5218 unsigned int i; 5219 5220 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5221 if (tpacpi_leds[i].led_classdev.name) 5222 led_classdev_unregister(&tpacpi_leds[i].led_classdev); 5223 } 5224 5225 kfree(tpacpi_leds); 5226 } 5227 5228 static int __init tpacpi_init_led(unsigned int led) 5229 { 5230 int rc; 5231 5232 tpacpi_leds[led].led = led; 5233 5234 /* LEDs with no name don't get registered */ 5235 if (!tpacpi_led_names[led]) 5236 return 0; 5237 5238 tpacpi_leds[led].led_classdev.brightness_set = &led_sysfs_set; 5239 tpacpi_leds[led].led_classdev.blink_set = &led_sysfs_blink_set; 5240 if (led_supported == TPACPI_LED_570) 5241 tpacpi_leds[led].led_classdev.brightness_get = 5242 &led_sysfs_get; 5243 5244 tpacpi_leds[led].led_classdev.name = tpacpi_led_names[led]; 5245 5246 INIT_WORK(&tpacpi_leds[led].work, led_set_status_worker); 5247 5248 rc = led_classdev_register(&tpacpi_pdev->dev, 5249 &tpacpi_leds[led].led_classdev); 5250 if (rc < 0) 5251 tpacpi_leds[led].led_classdev.name = NULL; 5252 5253 return rc; 5254 } 5255 5256 static const struct tpacpi_quirk led_useful_qtable[] __initconst = { 5257 TPACPI_Q_IBM('1', 'E', 0x009f), /* A30 */ 5258 TPACPI_Q_IBM('1', 'N', 0x009f), /* A31 */ 5259 TPACPI_Q_IBM('1', 'G', 0x009f), /* A31 */ 5260 5261 TPACPI_Q_IBM('1', 'I', 0x0097), /* T30 */ 5262 TPACPI_Q_IBM('1', 'R', 0x0097), /* T40, T41, T42, R50, R51 */ 5263 TPACPI_Q_IBM('7', '0', 0x0097), /* T43, R52 */ 5264 TPACPI_Q_IBM('1', 'Y', 0x0097), /* T43 */ 5265 TPACPI_Q_IBM('1', 'W', 0x0097), /* R50e */ 5266 TPACPI_Q_IBM('1', 'V', 0x0097), /* R51 */ 5267 TPACPI_Q_IBM('7', '8', 0x0097), /* R51e */ 5268 TPACPI_Q_IBM('7', '6', 0x0097), /* R52 */ 5269 5270 TPACPI_Q_IBM('1', 'K', 0x00bf), /* X30 */ 5271 TPACPI_Q_IBM('1', 'Q', 0x00bf), /* X31, X32 */ 5272 TPACPI_Q_IBM('1', 'U', 0x00bf), /* X40 */ 5273 TPACPI_Q_IBM('7', '4', 0x00bf), /* X41 */ 5274 TPACPI_Q_IBM('7', '5', 0x00bf), /* X41t */ 5275 5276 TPACPI_Q_IBM('7', '9', 0x1f97), /* T60 (1) */ 5277 TPACPI_Q_IBM('7', '7', 0x1f97), /* Z60* (1) */ 5278 TPACPI_Q_IBM('7', 'F', 0x1f97), /* Z61* (1) */ 5279 TPACPI_Q_IBM('7', 'B', 0x1fb7), /* X60 (1) */ 5280 5281 /* (1) - may have excess leds enabled on MSB */ 5282 5283 /* Defaults (order matters, keep last, don't reorder!) */ 5284 { /* Lenovo */ 5285 .vendor = PCI_VENDOR_ID_LENOVO, 5286 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5287 .quirks = 0x1fffU, 5288 }, 5289 { /* IBM ThinkPads with no EC version string */ 5290 .vendor = PCI_VENDOR_ID_IBM, 5291 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_UNKNOWN, 5292 .quirks = 0x00ffU, 5293 }, 5294 { /* IBM ThinkPads with EC version string */ 5295 .vendor = PCI_VENDOR_ID_IBM, 5296 .bios = TPACPI_MATCH_ANY, .ec = TPACPI_MATCH_ANY, 5297 .quirks = 0x00bfU, 5298 }, 5299 }; 5300 5301 #undef TPACPI_LEDQ_IBM 5302 #undef TPACPI_LEDQ_LNV 5303 5304 static enum led_access_mode __init led_init_detect_mode(void) 5305 { 5306 acpi_status status; 5307 5308 if (tpacpi_is_ibm()) { 5309 /* 570 */ 5310 status = acpi_get_handle(ec_handle, "SLED", &led_handle); 5311 if (ACPI_SUCCESS(status)) 5312 return TPACPI_LED_570; 5313 5314 /* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20-21 */ 5315 status = acpi_get_handle(ec_handle, "SYSL", &led_handle); 5316 if (ACPI_SUCCESS(status)) 5317 return TPACPI_LED_OLD; 5318 } 5319 5320 /* most others */ 5321 status = acpi_get_handle(ec_handle, "LED", &led_handle); 5322 if (ACPI_SUCCESS(status)) 5323 return TPACPI_LED_NEW; 5324 5325 /* R30, R31, and unknown firmwares */ 5326 led_handle = NULL; 5327 return TPACPI_LED_NONE; 5328 } 5329 5330 static int __init led_init(struct ibm_init_struct *iibm) 5331 { 5332 unsigned int i; 5333 int rc; 5334 unsigned long useful_leds; 5335 5336 vdbg_printk(TPACPI_DBG_INIT, "initializing LED subdriver\n"); 5337 5338 led_supported = led_init_detect_mode(); 5339 5340 vdbg_printk(TPACPI_DBG_INIT, "LED commands are %s, mode %d\n", 5341 str_supported(led_supported), led_supported); 5342 5343 if (led_supported == TPACPI_LED_NONE) 5344 return 1; 5345 5346 tpacpi_leds = kzalloc(sizeof(*tpacpi_leds) * TPACPI_LED_NUMLEDS, 5347 GFP_KERNEL); 5348 if (!tpacpi_leds) { 5349 printk(TPACPI_ERR "Out of memory for LED data\n"); 5350 return -ENOMEM; 5351 } 5352 5353 useful_leds = tpacpi_check_quirks(led_useful_qtable, 5354 ARRAY_SIZE(led_useful_qtable)); 5355 5356 for (i = 0; i < TPACPI_LED_NUMLEDS; i++) { 5357 if (!tpacpi_is_led_restricted(i) && 5358 test_bit(i, &useful_leds)) { 5359 rc = tpacpi_init_led(i); 5360 if (rc < 0) { 5361 led_exit(); 5362 return rc; 5363 } 5364 } 5365 } 5366 5367 #ifdef CONFIG_THINKPAD_ACPI_UNSAFE_LEDS 5368 printk(TPACPI_NOTICE 5369 "warning: userspace override of important " 5370 "firmware LEDs is enabled\n"); 5371 #endif 5372 return 0; 5373 } 5374 5375 #define str_led_status(s) \ 5376 ((s) == TPACPI_LED_OFF ? "off" : \ 5377 ((s) == TPACPI_LED_ON ? "on" : "blinking")) 5378 5379 static int led_read(struct seq_file *m) 5380 { 5381 if (!led_supported) { 5382 seq_printf(m, "status:\t\tnot supported\n"); 5383 return 0; 5384 } 5385 seq_printf(m, "status:\t\tsupported\n"); 5386 5387 if (led_supported == TPACPI_LED_570) { 5388 /* 570 */ 5389 int i, status; 5390 for (i = 0; i < 8; i++) { 5391 status = led_get_status(i); 5392 if (status < 0) 5393 return -EIO; 5394 seq_printf(m, "%d:\t\t%s\n", 5395 i, str_led_status(status)); 5396 } 5397 } 5398 5399 seq_printf(m, "commands:\t" 5400 "<led> on, <led> off, <led> blink (<led> is 0-15)\n"); 5401 5402 return 0; 5403 } 5404 5405 static int led_write(char *buf) 5406 { 5407 char *cmd; 5408 int led, rc; 5409 enum led_status_t s; 5410 5411 if (!led_supported) 5412 return -ENODEV; 5413 5414 while ((cmd = next_cmd(&buf))) { 5415 if (sscanf(cmd, "%d", &led) != 1 || led < 0 || led > 15) 5416 return -EINVAL; 5417 5418 if (strstr(cmd, "off")) { 5419 s = TPACPI_LED_OFF; 5420 } else if (strstr(cmd, "on")) { 5421 s = TPACPI_LED_ON; 5422 } else if (strstr(cmd, "blink")) { 5423 s = TPACPI_LED_BLINK; 5424 } else { 5425 return -EINVAL; 5426 } 5427 5428 rc = led_set_status(led, s); 5429 if (rc < 0) 5430 return rc; 5431 } 5432 5433 return 0; 5434 } 5435 5436 static struct ibm_struct led_driver_data = { 5437 .name = "led", 5438 .read = led_read, 5439 .write = led_write, 5440 .exit = led_exit, 5441 }; 5442 5443 /************************************************************************* 5444 * Beep subdriver 5445 */ 5446 5447 TPACPI_HANDLE(beep, ec, "BEEP"); /* all except R30, R31 */ 5448 5449 #define TPACPI_BEEP_Q1 0x0001 5450 5451 static const struct tpacpi_quirk beep_quirk_table[] __initconst = { 5452 TPACPI_Q_IBM('I', 'M', TPACPI_BEEP_Q1), /* 570 */ 5453 TPACPI_Q_IBM('I', 'U', TPACPI_BEEP_Q1), /* 570E - unverified */ 5454 }; 5455 5456 static int __init beep_init(struct ibm_init_struct *iibm) 5457 { 5458 unsigned long quirks; 5459 5460 vdbg_printk(TPACPI_DBG_INIT, "initializing beep subdriver\n"); 5461 5462 TPACPI_ACPIHANDLE_INIT(beep); 5463 5464 vdbg_printk(TPACPI_DBG_INIT, "beep is %s\n", 5465 str_supported(beep_handle != NULL)); 5466 5467 quirks = tpacpi_check_quirks(beep_quirk_table, 5468 ARRAY_SIZE(beep_quirk_table)); 5469 5470 tp_features.beep_needs_two_args = !!(quirks & TPACPI_BEEP_Q1); 5471 5472 return (beep_handle)? 0 : 1; 5473 } 5474 5475 static int beep_read(struct seq_file *m) 5476 { 5477 if (!beep_handle) 5478 seq_printf(m, "status:\t\tnot supported\n"); 5479 else { 5480 seq_printf(m, "status:\t\tsupported\n"); 5481 seq_printf(m, "commands:\t<cmd> (<cmd> is 0-17)\n"); 5482 } 5483 5484 return 0; 5485 } 5486 5487 static int beep_write(char *buf) 5488 { 5489 char *cmd; 5490 int beep_cmd; 5491 5492 if (!beep_handle) 5493 return -ENODEV; 5494 5495 while ((cmd = next_cmd(&buf))) { 5496 if (sscanf(cmd, "%u", &beep_cmd) == 1 && 5497 beep_cmd >= 0 && beep_cmd <= 17) { 5498 /* beep_cmd set */ 5499 } else 5500 return -EINVAL; 5501 if (tp_features.beep_needs_two_args) { 5502 if (!acpi_evalf(beep_handle, NULL, NULL, "vdd", 5503 beep_cmd, 0)) 5504 return -EIO; 5505 } else { 5506 if (!acpi_evalf(beep_handle, NULL, NULL, "vd", 5507 beep_cmd)) 5508 return -EIO; 5509 } 5510 } 5511 5512 return 0; 5513 } 5514 5515 static struct ibm_struct beep_driver_data = { 5516 .name = "beep", 5517 .read = beep_read, 5518 .write = beep_write, 5519 }; 5520 5521 /************************************************************************* 5522 * Thermal subdriver 5523 */ 5524 5525 enum thermal_access_mode { 5526 TPACPI_THERMAL_NONE = 0, /* No thermal support */ 5527 TPACPI_THERMAL_ACPI_TMP07, /* Use ACPI TMP0-7 */ 5528 TPACPI_THERMAL_ACPI_UPDT, /* Use ACPI TMP0-7 with UPDT */ 5529 TPACPI_THERMAL_TPEC_8, /* Use ACPI EC regs, 8 sensors */ 5530 TPACPI_THERMAL_TPEC_16, /* Use ACPI EC regs, 16 sensors */ 5531 }; 5532 5533 enum { /* TPACPI_THERMAL_TPEC_* */ 5534 TP_EC_THERMAL_TMP0 = 0x78, /* ACPI EC regs TMP 0..7 */ 5535 TP_EC_THERMAL_TMP8 = 0xC0, /* ACPI EC regs TMP 8..15 */ 5536 TP_EC_THERMAL_TMP_NA = -128, /* ACPI EC sensor not available */ 5537 5538 TPACPI_THERMAL_SENSOR_NA = -128000, /* Sensor not available */ 5539 }; 5540 5541 5542 #define TPACPI_MAX_THERMAL_SENSORS 16 /* Max thermal sensors supported */ 5543 struct ibm_thermal_sensors_struct { 5544 s32 temp[TPACPI_MAX_THERMAL_SENSORS]; 5545 }; 5546 5547 static enum thermal_access_mode thermal_read_mode; 5548 5549 /* idx is zero-based */ 5550 static int thermal_get_sensor(int idx, s32 *value) 5551 { 5552 int t; 5553 s8 tmp; 5554 char tmpi[5]; 5555 5556 t = TP_EC_THERMAL_TMP0; 5557 5558 switch (thermal_read_mode) { 5559 #if TPACPI_MAX_THERMAL_SENSORS >= 16 5560 case TPACPI_THERMAL_TPEC_16: 5561 if (idx >= 8 && idx <= 15) { 5562 t = TP_EC_THERMAL_TMP8; 5563 idx -= 8; 5564 } 5565 /* fallthrough */ 5566 #endif 5567 case TPACPI_THERMAL_TPEC_8: 5568 if (idx <= 7) { 5569 if (!acpi_ec_read(t + idx, &tmp)) 5570 return -EIO; 5571 *value = tmp * 1000; 5572 return 0; 5573 } 5574 break; 5575 5576 case TPACPI_THERMAL_ACPI_UPDT: 5577 if (idx <= 7) { 5578 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5579 if (!acpi_evalf(ec_handle, NULL, "UPDT", "v")) 5580 return -EIO; 5581 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5582 return -EIO; 5583 *value = (t - 2732) * 100; 5584 return 0; 5585 } 5586 break; 5587 5588 case TPACPI_THERMAL_ACPI_TMP07: 5589 if (idx <= 7) { 5590 snprintf(tmpi, sizeof(tmpi), "TMP%c", '0' + idx); 5591 if (!acpi_evalf(ec_handle, &t, tmpi, "d")) 5592 return -EIO; 5593 if (t > 127 || t < -127) 5594 t = TP_EC_THERMAL_TMP_NA; 5595 *value = t * 1000; 5596 return 0; 5597 } 5598 break; 5599 5600 case TPACPI_THERMAL_NONE: 5601 default: 5602 return -ENOSYS; 5603 } 5604 5605 return -EINVAL; 5606 } 5607 5608 static int thermal_get_sensors(struct ibm_thermal_sensors_struct *s) 5609 { 5610 int res, i; 5611 int n; 5612 5613 n = 8; 5614 i = 0; 5615 5616 if (!s) 5617 return -EINVAL; 5618 5619 if (thermal_read_mode == TPACPI_THERMAL_TPEC_16) 5620 n = 16; 5621 5622 for (i = 0 ; i < n; i++) { 5623 res = thermal_get_sensor(i, &s->temp[i]); 5624 if (res) 5625 return res; 5626 } 5627 5628 return n; 5629 } 5630 5631 static void thermal_dump_all_sensors(void) 5632 { 5633 int n, i; 5634 struct ibm_thermal_sensors_struct t; 5635 5636 n = thermal_get_sensors(&t); 5637 if (n <= 0) 5638 return; 5639 5640 printk(TPACPI_NOTICE 5641 "temperatures (Celsius):"); 5642 5643 for (i = 0; i < n; i++) { 5644 if (t.temp[i] != TPACPI_THERMAL_SENSOR_NA) 5645 printk(KERN_CONT " %d", (int)(t.temp[i] / 1000)); 5646 else 5647 printk(KERN_CONT " N/A"); 5648 } 5649 5650 printk(KERN_CONT "\n"); 5651 } 5652 5653 /* sysfs temp##_input -------------------------------------------------- */ 5654 5655 static ssize_t thermal_temp_input_show(struct device *dev, 5656 struct device_attribute *attr, 5657 char *buf) 5658 { 5659 struct sensor_device_attribute *sensor_attr = 5660 to_sensor_dev_attr(attr); 5661 int idx = sensor_attr->index; 5662 s32 value; 5663 int res; 5664 5665 res = thermal_get_sensor(idx, &value); 5666 if (res) 5667 return res; 5668 if (value == TPACPI_THERMAL_SENSOR_NA) 5669 return -ENXIO; 5670 5671 return snprintf(buf, PAGE_SIZE, "%d\n", value); 5672 } 5673 5674 #define THERMAL_SENSOR_ATTR_TEMP(_idxA, _idxB) \ 5675 SENSOR_ATTR(temp##_idxA##_input, S_IRUGO, \ 5676 thermal_temp_input_show, NULL, _idxB) 5677 5678 static struct sensor_device_attribute sensor_dev_attr_thermal_temp_input[] = { 5679 THERMAL_SENSOR_ATTR_TEMP(1, 0), 5680 THERMAL_SENSOR_ATTR_TEMP(2, 1), 5681 THERMAL_SENSOR_ATTR_TEMP(3, 2), 5682 THERMAL_SENSOR_ATTR_TEMP(4, 3), 5683 THERMAL_SENSOR_ATTR_TEMP(5, 4), 5684 THERMAL_SENSOR_ATTR_TEMP(6, 5), 5685 THERMAL_SENSOR_ATTR_TEMP(7, 6), 5686 THERMAL_SENSOR_ATTR_TEMP(8, 7), 5687 THERMAL_SENSOR_ATTR_TEMP(9, 8), 5688 THERMAL_SENSOR_ATTR_TEMP(10, 9), 5689 THERMAL_SENSOR_ATTR_TEMP(11, 10), 5690 THERMAL_SENSOR_ATTR_TEMP(12, 11), 5691 THERMAL_SENSOR_ATTR_TEMP(13, 12), 5692 THERMAL_SENSOR_ATTR_TEMP(14, 13), 5693 THERMAL_SENSOR_ATTR_TEMP(15, 14), 5694 THERMAL_SENSOR_ATTR_TEMP(16, 15), 5695 }; 5696 5697 #define THERMAL_ATTRS(X) \ 5698 &sensor_dev_attr_thermal_temp_input[X].dev_attr.attr 5699 5700 static struct attribute *thermal_temp_input_attr[] = { 5701 THERMAL_ATTRS(8), 5702 THERMAL_ATTRS(9), 5703 THERMAL_ATTRS(10), 5704 THERMAL_ATTRS(11), 5705 THERMAL_ATTRS(12), 5706 THERMAL_ATTRS(13), 5707 THERMAL_ATTRS(14), 5708 THERMAL_ATTRS(15), 5709 THERMAL_ATTRS(0), 5710 THERMAL_ATTRS(1), 5711 THERMAL_ATTRS(2), 5712 THERMAL_ATTRS(3), 5713 THERMAL_ATTRS(4), 5714 THERMAL_ATTRS(5), 5715 THERMAL_ATTRS(6), 5716 THERMAL_ATTRS(7), 5717 NULL 5718 }; 5719 5720 static const struct attribute_group thermal_temp_input16_group = { 5721 .attrs = thermal_temp_input_attr 5722 }; 5723 5724 static const struct attribute_group thermal_temp_input8_group = { 5725 .attrs = &thermal_temp_input_attr[8] 5726 }; 5727 5728 #undef THERMAL_SENSOR_ATTR_TEMP 5729 #undef THERMAL_ATTRS 5730 5731 /* --------------------------------------------------------------------- */ 5732 5733 static int __init thermal_init(struct ibm_init_struct *iibm) 5734 { 5735 u8 t, ta1, ta2; 5736 int i; 5737 int acpi_tmp7; 5738 int res; 5739 5740 vdbg_printk(TPACPI_DBG_INIT, "initializing thermal subdriver\n"); 5741 5742 acpi_tmp7 = acpi_evalf(ec_handle, NULL, "TMP7", "qv"); 5743 5744 if (thinkpad_id.ec_model) { 5745 /* 5746 * Direct EC access mode: sensors at registers 5747 * 0x78-0x7F, 0xC0-0xC7. Registers return 0x00 for 5748 * non-implemented, thermal sensors return 0x80 when 5749 * not available 5750 */ 5751 5752 ta1 = ta2 = 0; 5753 for (i = 0; i < 8; i++) { 5754 if (acpi_ec_read(TP_EC_THERMAL_TMP0 + i, &t)) { 5755 ta1 |= t; 5756 } else { 5757 ta1 = 0; 5758 break; 5759 } 5760 if (acpi_ec_read(TP_EC_THERMAL_TMP8 + i, &t)) { 5761 ta2 |= t; 5762 } else { 5763 ta1 = 0; 5764 break; 5765 } 5766 } 5767 if (ta1 == 0) { 5768 /* This is sheer paranoia, but we handle it anyway */ 5769 if (acpi_tmp7) { 5770 printk(TPACPI_ERR 5771 "ThinkPad ACPI EC access misbehaving, " 5772 "falling back to ACPI TMPx access " 5773 "mode\n"); 5774 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5775 } else { 5776 printk(TPACPI_ERR 5777 "ThinkPad ACPI EC access misbehaving, " 5778 "disabling thermal sensors access\n"); 5779 thermal_read_mode = TPACPI_THERMAL_NONE; 5780 } 5781 } else { 5782 thermal_read_mode = 5783 (ta2 != 0) ? 5784 TPACPI_THERMAL_TPEC_16 : TPACPI_THERMAL_TPEC_8; 5785 } 5786 } else if (acpi_tmp7) { 5787 if (tpacpi_is_ibm() && 5788 acpi_evalf(ec_handle, NULL, "UPDT", "qv")) { 5789 /* 600e/x, 770e, 770x */ 5790 thermal_read_mode = TPACPI_THERMAL_ACPI_UPDT; 5791 } else { 5792 /* IBM/LENOVO DSDT EC.TMPx access, max 8 sensors */ 5793 thermal_read_mode = TPACPI_THERMAL_ACPI_TMP07; 5794 } 5795 } else { 5796 /* temperatures not supported on 570, G4x, R30, R31, R32 */ 5797 thermal_read_mode = TPACPI_THERMAL_NONE; 5798 } 5799 5800 vdbg_printk(TPACPI_DBG_INIT, "thermal is %s, mode %d\n", 5801 str_supported(thermal_read_mode != TPACPI_THERMAL_NONE), 5802 thermal_read_mode); 5803 5804 switch (thermal_read_mode) { 5805 case TPACPI_THERMAL_TPEC_16: 5806 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5807 &thermal_temp_input16_group); 5808 if (res) 5809 return res; 5810 break; 5811 case TPACPI_THERMAL_TPEC_8: 5812 case TPACPI_THERMAL_ACPI_TMP07: 5813 case TPACPI_THERMAL_ACPI_UPDT: 5814 res = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 5815 &thermal_temp_input8_group); 5816 if (res) 5817 return res; 5818 break; 5819 case TPACPI_THERMAL_NONE: 5820 default: 5821 return 1; 5822 } 5823 5824 return 0; 5825 } 5826 5827 static void thermal_exit(void) 5828 { 5829 switch (thermal_read_mode) { 5830 case TPACPI_THERMAL_TPEC_16: 5831 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5832 &thermal_temp_input16_group); 5833 break; 5834 case TPACPI_THERMAL_TPEC_8: 5835 case TPACPI_THERMAL_ACPI_TMP07: 5836 case TPACPI_THERMAL_ACPI_UPDT: 5837 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 5838 &thermal_temp_input8_group); 5839 break; 5840 case TPACPI_THERMAL_NONE: 5841 default: 5842 break; 5843 } 5844 } 5845 5846 static int thermal_read(struct seq_file *m) 5847 { 5848 int n, i; 5849 struct ibm_thermal_sensors_struct t; 5850 5851 n = thermal_get_sensors(&t); 5852 if (unlikely(n < 0)) 5853 return n; 5854 5855 seq_printf(m, "temperatures:\t"); 5856 5857 if (n > 0) { 5858 for (i = 0; i < (n - 1); i++) 5859 seq_printf(m, "%d ", t.temp[i] / 1000); 5860 seq_printf(m, "%d\n", t.temp[i] / 1000); 5861 } else 5862 seq_printf(m, "not supported\n"); 5863 5864 return 0; 5865 } 5866 5867 static struct ibm_struct thermal_driver_data = { 5868 .name = "thermal", 5869 .read = thermal_read, 5870 .exit = thermal_exit, 5871 }; 5872 5873 /************************************************************************* 5874 * Backlight/brightness subdriver 5875 */ 5876 5877 #define TPACPI_BACKLIGHT_DEV_NAME "thinkpad_screen" 5878 5879 /* 5880 * ThinkPads can read brightness from two places: EC HBRV (0x31), or 5881 * CMOS NVRAM byte 0x5E, bits 0-3. 5882 * 5883 * EC HBRV (0x31) has the following layout 5884 * Bit 7: unknown function 5885 * Bit 6: unknown function 5886 * Bit 5: Z: honour scale changes, NZ: ignore scale changes 5887 * Bit 4: must be set to zero to avoid problems 5888 * Bit 3-0: backlight brightness level 5889 * 5890 * brightness_get_raw returns status data in the HBRV layout 5891 * 5892 * WARNING: The X61 has been verified to use HBRV for something else, so 5893 * this should be used _only_ on IBM ThinkPads, and maybe with some careful 5894 * testing on the very early *60 Lenovo models... 5895 */ 5896 5897 enum { 5898 TP_EC_BACKLIGHT = 0x31, 5899 5900 /* TP_EC_BACKLIGHT bitmasks */ 5901 TP_EC_BACKLIGHT_LVLMSK = 0x1F, 5902 TP_EC_BACKLIGHT_CMDMSK = 0xE0, 5903 TP_EC_BACKLIGHT_MAPSW = 0x20, 5904 }; 5905 5906 enum tpacpi_brightness_access_mode { 5907 TPACPI_BRGHT_MODE_AUTO = 0, /* Not implemented yet */ 5908 TPACPI_BRGHT_MODE_EC, /* EC control */ 5909 TPACPI_BRGHT_MODE_UCMS_STEP, /* UCMS step-based control */ 5910 TPACPI_BRGHT_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 5911 TPACPI_BRGHT_MODE_MAX 5912 }; 5913 5914 static struct backlight_device *ibm_backlight_device; 5915 5916 static enum tpacpi_brightness_access_mode brightness_mode = 5917 TPACPI_BRGHT_MODE_MAX; 5918 5919 static unsigned int brightness_enable = 2; /* 2 = auto, 0 = no, 1 = yes */ 5920 5921 static struct mutex brightness_mutex; 5922 5923 /* NVRAM brightness access, 5924 * call with brightness_mutex held! */ 5925 static unsigned int tpacpi_brightness_nvram_get(void) 5926 { 5927 u8 lnvram; 5928 5929 lnvram = (nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS) 5930 & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5931 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS; 5932 lnvram &= bright_maxlvl; 5933 5934 return lnvram; 5935 } 5936 5937 static void tpacpi_brightness_checkpoint_nvram(void) 5938 { 5939 u8 lec = 0; 5940 u8 b_nvram; 5941 5942 if (brightness_mode != TPACPI_BRGHT_MODE_ECNVRAM) 5943 return; 5944 5945 vdbg_printk(TPACPI_DBG_BRGHT, 5946 "trying to checkpoint backlight level to NVRAM...\n"); 5947 5948 if (mutex_lock_killable(&brightness_mutex) < 0) 5949 return; 5950 5951 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5952 goto unlock; 5953 lec &= TP_EC_BACKLIGHT_LVLMSK; 5954 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_BRIGHTNESS); 5955 5956 if (lec != ((b_nvram & TP_NVRAM_MASK_LEVEL_BRIGHTNESS) 5957 >> TP_NVRAM_POS_LEVEL_BRIGHTNESS)) { 5958 /* NVRAM needs update */ 5959 b_nvram &= ~(TP_NVRAM_MASK_LEVEL_BRIGHTNESS << 5960 TP_NVRAM_POS_LEVEL_BRIGHTNESS); 5961 b_nvram |= lec; 5962 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_BRIGHTNESS); 5963 dbg_printk(TPACPI_DBG_BRGHT, 5964 "updated NVRAM backlight level to %u (0x%02x)\n", 5965 (unsigned int) lec, (unsigned int) b_nvram); 5966 } else 5967 vdbg_printk(TPACPI_DBG_BRGHT, 5968 "NVRAM backlight level already is %u (0x%02x)\n", 5969 (unsigned int) lec, (unsigned int) b_nvram); 5970 5971 unlock: 5972 mutex_unlock(&brightness_mutex); 5973 } 5974 5975 5976 /* call with brightness_mutex held! */ 5977 static int tpacpi_brightness_get_raw(int *status) 5978 { 5979 u8 lec = 0; 5980 5981 switch (brightness_mode) { 5982 case TPACPI_BRGHT_MODE_UCMS_STEP: 5983 *status = tpacpi_brightness_nvram_get(); 5984 return 0; 5985 case TPACPI_BRGHT_MODE_EC: 5986 case TPACPI_BRGHT_MODE_ECNVRAM: 5987 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 5988 return -EIO; 5989 *status = lec; 5990 return 0; 5991 default: 5992 return -ENXIO; 5993 } 5994 } 5995 5996 /* call with brightness_mutex held! */ 5997 /* do NOT call with illegal backlight level value */ 5998 static int tpacpi_brightness_set_ec(unsigned int value) 5999 { 6000 u8 lec = 0; 6001 6002 if (unlikely(!acpi_ec_read(TP_EC_BACKLIGHT, &lec))) 6003 return -EIO; 6004 6005 if (unlikely(!acpi_ec_write(TP_EC_BACKLIGHT, 6006 (lec & TP_EC_BACKLIGHT_CMDMSK) | 6007 (value & TP_EC_BACKLIGHT_LVLMSK)))) 6008 return -EIO; 6009 6010 return 0; 6011 } 6012 6013 /* call with brightness_mutex held! */ 6014 static int tpacpi_brightness_set_ucmsstep(unsigned int value) 6015 { 6016 int cmos_cmd, inc; 6017 unsigned int current_value, i; 6018 6019 current_value = tpacpi_brightness_nvram_get(); 6020 6021 if (value == current_value) 6022 return 0; 6023 6024 cmos_cmd = (value > current_value) ? 6025 TP_CMOS_BRIGHTNESS_UP : 6026 TP_CMOS_BRIGHTNESS_DOWN; 6027 inc = (value > current_value) ? 1 : -1; 6028 6029 for (i = current_value; i != value; i += inc) 6030 if (issue_thinkpad_cmos_command(cmos_cmd)) 6031 return -EIO; 6032 6033 return 0; 6034 } 6035 6036 /* May return EINTR which can always be mapped to ERESTARTSYS */ 6037 static int brightness_set(unsigned int value) 6038 { 6039 int res; 6040 6041 if (value > bright_maxlvl || value < 0) 6042 return -EINVAL; 6043 6044 vdbg_printk(TPACPI_DBG_BRGHT, 6045 "set backlight level to %d\n", value); 6046 6047 res = mutex_lock_killable(&brightness_mutex); 6048 if (res < 0) 6049 return res; 6050 6051 switch (brightness_mode) { 6052 case TPACPI_BRGHT_MODE_EC: 6053 case TPACPI_BRGHT_MODE_ECNVRAM: 6054 res = tpacpi_brightness_set_ec(value); 6055 break; 6056 case TPACPI_BRGHT_MODE_UCMS_STEP: 6057 res = tpacpi_brightness_set_ucmsstep(value); 6058 break; 6059 default: 6060 res = -ENXIO; 6061 } 6062 6063 mutex_unlock(&brightness_mutex); 6064 return res; 6065 } 6066 6067 /* sysfs backlight class ----------------------------------------------- */ 6068 6069 static int brightness_update_status(struct backlight_device *bd) 6070 { 6071 unsigned int level = 6072 (bd->props.fb_blank == FB_BLANK_UNBLANK && 6073 bd->props.power == FB_BLANK_UNBLANK) ? 6074 bd->props.brightness : 0; 6075 6076 dbg_printk(TPACPI_DBG_BRGHT, 6077 "backlight: attempt to set level to %d\n", 6078 level); 6079 6080 /* it is the backlight class's job (caller) to handle 6081 * EINTR and other errors properly */ 6082 return brightness_set(level); 6083 } 6084 6085 static int brightness_get(struct backlight_device *bd) 6086 { 6087 int status, res; 6088 6089 res = mutex_lock_killable(&brightness_mutex); 6090 if (res < 0) 6091 return 0; 6092 6093 res = tpacpi_brightness_get_raw(&status); 6094 6095 mutex_unlock(&brightness_mutex); 6096 6097 if (res < 0) 6098 return 0; 6099 6100 return status & TP_EC_BACKLIGHT_LVLMSK; 6101 } 6102 6103 static void tpacpi_brightness_notify_change(void) 6104 { 6105 backlight_force_update(ibm_backlight_device, 6106 BACKLIGHT_UPDATE_HOTKEY); 6107 } 6108 6109 static const struct backlight_ops ibm_backlight_data = { 6110 .get_brightness = brightness_get, 6111 .update_status = brightness_update_status, 6112 }; 6113 6114 /* --------------------------------------------------------------------- */ 6115 6116 /* 6117 * Call _BCL method of video device. On some ThinkPads this will 6118 * switch the firmware to the ACPI brightness control mode. 6119 */ 6120 6121 static int __init tpacpi_query_bcl_levels(acpi_handle handle) 6122 { 6123 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; 6124 union acpi_object *obj; 6125 int rc; 6126 6127 if (ACPI_SUCCESS(acpi_evaluate_object(handle, "_BCL", NULL, &buffer))) { 6128 obj = (union acpi_object *)buffer.pointer; 6129 if (!obj || (obj->type != ACPI_TYPE_PACKAGE)) { 6130 printk(TPACPI_ERR "Unknown _BCL data, " 6131 "please report this to %s\n", TPACPI_MAIL); 6132 rc = 0; 6133 } else { 6134 rc = obj->package.count; 6135 } 6136 } else { 6137 return 0; 6138 } 6139 6140 kfree(buffer.pointer); 6141 return rc; 6142 } 6143 6144 6145 /* 6146 * Returns 0 (no ACPI _BCL or _BCL invalid), or size of brightness map 6147 */ 6148 static unsigned int __init tpacpi_check_std_acpi_brightness_support(void) 6149 { 6150 acpi_handle video_device; 6151 int bcl_levels = 0; 6152 6153 tpacpi_acpi_handle_locate("video", ACPI_VIDEO_HID, &video_device); 6154 if (video_device) 6155 bcl_levels = tpacpi_query_bcl_levels(video_device); 6156 6157 tp_features.bright_acpimode = (bcl_levels > 0); 6158 6159 return (bcl_levels > 2) ? (bcl_levels - 2) : 0; 6160 } 6161 6162 /* 6163 * These are only useful for models that have only one possibility 6164 * of GPU. If the BIOS model handles both ATI and Intel, don't use 6165 * these quirks. 6166 */ 6167 #define TPACPI_BRGHT_Q_NOEC 0x0001 /* Must NOT use EC HBRV */ 6168 #define TPACPI_BRGHT_Q_EC 0x0002 /* Should or must use EC HBRV */ 6169 #define TPACPI_BRGHT_Q_ASK 0x8000 /* Ask for user report */ 6170 6171 static const struct tpacpi_quirk brightness_quirk_table[] __initconst = { 6172 /* Models with ATI GPUs known to require ECNVRAM mode */ 6173 TPACPI_Q_IBM('1', 'Y', TPACPI_BRGHT_Q_EC), /* T43/p ATI */ 6174 6175 /* Models with ATI GPUs that can use ECNVRAM */ 6176 TPACPI_Q_IBM('1', 'R', TPACPI_BRGHT_Q_EC), /* R50,51 T40-42 */ 6177 TPACPI_Q_IBM('1', 'Q', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6178 TPACPI_Q_IBM('7', '6', TPACPI_BRGHT_Q_EC), /* R52 */ 6179 TPACPI_Q_IBM('7', '8', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6180 6181 /* Models with Intel Extreme Graphics 2 */ 6182 TPACPI_Q_IBM('1', 'U', TPACPI_BRGHT_Q_NOEC), /* X40 */ 6183 TPACPI_Q_IBM('1', 'V', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6184 TPACPI_Q_IBM('1', 'W', TPACPI_BRGHT_Q_ASK|TPACPI_BRGHT_Q_EC), 6185 6186 /* Models with Intel GMA900 */ 6187 TPACPI_Q_IBM('7', '0', TPACPI_BRGHT_Q_NOEC), /* T43, R52 */ 6188 TPACPI_Q_IBM('7', '4', TPACPI_BRGHT_Q_NOEC), /* X41 */ 6189 TPACPI_Q_IBM('7', '5', TPACPI_BRGHT_Q_NOEC), /* X41 Tablet */ 6190 }; 6191 6192 /* 6193 * Returns < 0 for error, otherwise sets tp_features.bright_* 6194 * and bright_maxlvl. 6195 */ 6196 static void __init tpacpi_detect_brightness_capabilities(void) 6197 { 6198 unsigned int b; 6199 6200 vdbg_printk(TPACPI_DBG_INIT, 6201 "detecting firmware brightness interface capabilities\n"); 6202 6203 /* we could run a quirks check here (same table used by 6204 * brightness_init) if needed */ 6205 6206 /* 6207 * We always attempt to detect acpi support, so as to switch 6208 * Lenovo Vista BIOS to ACPI brightness mode even if we are not 6209 * going to publish a backlight interface 6210 */ 6211 b = tpacpi_check_std_acpi_brightness_support(); 6212 switch (b) { 6213 case 16: 6214 bright_maxlvl = 15; 6215 printk(TPACPI_INFO 6216 "detected a 16-level brightness capable ThinkPad\n"); 6217 break; 6218 case 8: 6219 case 0: 6220 bright_maxlvl = 7; 6221 printk(TPACPI_INFO 6222 "detected a 8-level brightness capable ThinkPad\n"); 6223 break; 6224 default: 6225 printk(TPACPI_ERR 6226 "Unsupported brightness interface, " 6227 "please contact %s\n", TPACPI_MAIL); 6228 tp_features.bright_unkfw = 1; 6229 bright_maxlvl = b - 1; 6230 } 6231 } 6232 6233 static int __init brightness_init(struct ibm_init_struct *iibm) 6234 { 6235 struct backlight_properties props; 6236 int b; 6237 unsigned long quirks; 6238 6239 vdbg_printk(TPACPI_DBG_INIT, "initializing brightness subdriver\n"); 6240 6241 mutex_init(&brightness_mutex); 6242 6243 quirks = tpacpi_check_quirks(brightness_quirk_table, 6244 ARRAY_SIZE(brightness_quirk_table)); 6245 6246 /* tpacpi_detect_brightness_capabilities() must have run already */ 6247 6248 /* if it is unknown, we don't handle it: it wouldn't be safe */ 6249 if (tp_features.bright_unkfw) 6250 return 1; 6251 6252 if (!brightness_enable) { 6253 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6254 "brightness support disabled by " 6255 "module parameter\n"); 6256 return 1; 6257 } 6258 6259 if (acpi_video_backlight_support()) { 6260 if (brightness_enable > 1) { 6261 printk(TPACPI_INFO 6262 "Standard ACPI backlight interface " 6263 "available, not loading native one.\n"); 6264 return 1; 6265 } else if (brightness_enable == 1) { 6266 printk(TPACPI_WARN 6267 "Cannot enable backlight brightness support, " 6268 "ACPI is already handling it. Refer to the " 6269 "acpi_backlight kernel parameter\n"); 6270 return 1; 6271 } 6272 } else if (tp_features.bright_acpimode && brightness_enable > 1) { 6273 printk(TPACPI_NOTICE 6274 "Standard ACPI backlight interface not " 6275 "available, thinkpad_acpi native " 6276 "brightness control enabled\n"); 6277 } 6278 6279 /* 6280 * Check for module parameter bogosity, note that we 6281 * init brightness_mode to TPACPI_BRGHT_MODE_MAX in order to be 6282 * able to detect "unspecified" 6283 */ 6284 if (brightness_mode > TPACPI_BRGHT_MODE_MAX) 6285 return -EINVAL; 6286 6287 /* TPACPI_BRGHT_MODE_AUTO not implemented yet, just use default */ 6288 if (brightness_mode == TPACPI_BRGHT_MODE_AUTO || 6289 brightness_mode == TPACPI_BRGHT_MODE_MAX) { 6290 if (quirks & TPACPI_BRGHT_Q_EC) 6291 brightness_mode = TPACPI_BRGHT_MODE_ECNVRAM; 6292 else 6293 brightness_mode = TPACPI_BRGHT_MODE_UCMS_STEP; 6294 6295 dbg_printk(TPACPI_DBG_BRGHT, 6296 "driver auto-selected brightness_mode=%d\n", 6297 brightness_mode); 6298 } 6299 6300 /* Safety */ 6301 if (!tpacpi_is_ibm() && 6302 (brightness_mode == TPACPI_BRGHT_MODE_ECNVRAM || 6303 brightness_mode == TPACPI_BRGHT_MODE_EC)) 6304 return -EINVAL; 6305 6306 if (tpacpi_brightness_get_raw(&b) < 0) 6307 return 1; 6308 6309 memset(&props, 0, sizeof(struct backlight_properties)); 6310 props.max_brightness = bright_maxlvl; 6311 props.brightness = b & TP_EC_BACKLIGHT_LVLMSK; 6312 ibm_backlight_device = backlight_device_register(TPACPI_BACKLIGHT_DEV_NAME, 6313 NULL, NULL, 6314 &ibm_backlight_data, 6315 &props); 6316 if (IS_ERR(ibm_backlight_device)) { 6317 int rc = PTR_ERR(ibm_backlight_device); 6318 ibm_backlight_device = NULL; 6319 printk(TPACPI_ERR "Could not register backlight device\n"); 6320 return rc; 6321 } 6322 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6323 "brightness is supported\n"); 6324 6325 if (quirks & TPACPI_BRGHT_Q_ASK) { 6326 printk(TPACPI_NOTICE 6327 "brightness: will use unverified default: " 6328 "brightness_mode=%d\n", brightness_mode); 6329 printk(TPACPI_NOTICE 6330 "brightness: please report to %s whether it works well " 6331 "or not on your ThinkPad\n", TPACPI_MAIL); 6332 } 6333 6334 /* Added by mistake in early 2007. Probably useless, but it could 6335 * be working around some unknown firmware problem where the value 6336 * read at startup doesn't match the real hardware state... so leave 6337 * it in place just in case */ 6338 backlight_update_status(ibm_backlight_device); 6339 6340 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_BRGHT, 6341 "brightness: registering brightness hotkeys " 6342 "as change notification\n"); 6343 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6344 | TP_ACPI_HKEY_BRGHTUP_MASK 6345 | TP_ACPI_HKEY_BRGHTDWN_MASK); 6346 return 0; 6347 } 6348 6349 static void brightness_suspend(pm_message_t state) 6350 { 6351 tpacpi_brightness_checkpoint_nvram(); 6352 } 6353 6354 static void brightness_shutdown(void) 6355 { 6356 tpacpi_brightness_checkpoint_nvram(); 6357 } 6358 6359 static void brightness_exit(void) 6360 { 6361 if (ibm_backlight_device) { 6362 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_BRGHT, 6363 "calling backlight_device_unregister()\n"); 6364 backlight_device_unregister(ibm_backlight_device); 6365 } 6366 6367 tpacpi_brightness_checkpoint_nvram(); 6368 } 6369 6370 static int brightness_read(struct seq_file *m) 6371 { 6372 int level; 6373 6374 level = brightness_get(NULL); 6375 if (level < 0) { 6376 seq_printf(m, "level:\t\tunreadable\n"); 6377 } else { 6378 seq_printf(m, "level:\t\t%d\n", level); 6379 seq_printf(m, "commands:\tup, down\n"); 6380 seq_printf(m, "commands:\tlevel <level> (<level> is 0-%d)\n", 6381 bright_maxlvl); 6382 } 6383 6384 return 0; 6385 } 6386 6387 static int brightness_write(char *buf) 6388 { 6389 int level; 6390 int rc; 6391 char *cmd; 6392 6393 level = brightness_get(NULL); 6394 if (level < 0) 6395 return level; 6396 6397 while ((cmd = next_cmd(&buf))) { 6398 if (strlencmp(cmd, "up") == 0) { 6399 if (level < bright_maxlvl) 6400 level++; 6401 } else if (strlencmp(cmd, "down") == 0) { 6402 if (level > 0) 6403 level--; 6404 } else if (sscanf(cmd, "level %d", &level) == 1 && 6405 level >= 0 && level <= bright_maxlvl) { 6406 /* new level set */ 6407 } else 6408 return -EINVAL; 6409 } 6410 6411 tpacpi_disclose_usertask("procfs brightness", 6412 "set level to %d\n", level); 6413 6414 /* 6415 * Now we know what the final level should be, so we try to set it. 6416 * Doing it this way makes the syscall restartable in case of EINTR 6417 */ 6418 rc = brightness_set(level); 6419 if (!rc && ibm_backlight_device) 6420 backlight_force_update(ibm_backlight_device, 6421 BACKLIGHT_UPDATE_SYSFS); 6422 return (rc == -EINTR)? -ERESTARTSYS : rc; 6423 } 6424 6425 static struct ibm_struct brightness_driver_data = { 6426 .name = "brightness", 6427 .read = brightness_read, 6428 .write = brightness_write, 6429 .exit = brightness_exit, 6430 .suspend = brightness_suspend, 6431 .shutdown = brightness_shutdown, 6432 }; 6433 6434 /************************************************************************* 6435 * Volume subdriver 6436 */ 6437 6438 /* 6439 * IBM ThinkPads have a simple volume controller with MUTE gating. 6440 * Very early Lenovo ThinkPads follow the IBM ThinkPad spec. 6441 * 6442 * Since the *61 series (and probably also the later *60 series), Lenovo 6443 * ThinkPads only implement the MUTE gate. 6444 * 6445 * EC register 0x30 6446 * Bit 6: MUTE (1 mutes sound) 6447 * Bit 3-0: Volume 6448 * Other bits should be zero as far as we know. 6449 * 6450 * This is also stored in CMOS NVRAM, byte 0x60, bit 6 (MUTE), and 6451 * bits 3-0 (volume). Other bits in NVRAM may have other functions, 6452 * such as bit 7 which is used to detect repeated presses of MUTE, 6453 * and we leave them unchanged. 6454 */ 6455 6456 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 6457 6458 #define TPACPI_ALSA_DRVNAME "ThinkPad EC" 6459 #define TPACPI_ALSA_SHRTNAME "ThinkPad Console Audio Control" 6460 #define TPACPI_ALSA_MIXERNAME TPACPI_ALSA_SHRTNAME 6461 6462 static int alsa_index = ~((1 << (SNDRV_CARDS - 3)) - 1); /* last three slots */ 6463 static char *alsa_id = "ThinkPadEC"; 6464 static int alsa_enable = SNDRV_DEFAULT_ENABLE1; 6465 6466 struct tpacpi_alsa_data { 6467 struct snd_card *card; 6468 struct snd_ctl_elem_id *ctl_mute_id; 6469 struct snd_ctl_elem_id *ctl_vol_id; 6470 }; 6471 6472 static struct snd_card *alsa_card; 6473 6474 enum { 6475 TP_EC_AUDIO = 0x30, 6476 6477 /* TP_EC_AUDIO bits */ 6478 TP_EC_AUDIO_MUTESW = 6, 6479 6480 /* TP_EC_AUDIO bitmasks */ 6481 TP_EC_AUDIO_LVL_MSK = 0x0F, 6482 TP_EC_AUDIO_MUTESW_MSK = (1 << TP_EC_AUDIO_MUTESW), 6483 6484 /* Maximum volume */ 6485 TP_EC_VOLUME_MAX = 14, 6486 }; 6487 6488 enum tpacpi_volume_access_mode { 6489 TPACPI_VOL_MODE_AUTO = 0, /* Not implemented yet */ 6490 TPACPI_VOL_MODE_EC, /* Pure EC control */ 6491 TPACPI_VOL_MODE_UCMS_STEP, /* UCMS step-based control: N/A */ 6492 TPACPI_VOL_MODE_ECNVRAM, /* EC control w/ NVRAM store */ 6493 TPACPI_VOL_MODE_MAX 6494 }; 6495 6496 enum tpacpi_volume_capabilities { 6497 TPACPI_VOL_CAP_AUTO = 0, /* Use white/blacklist */ 6498 TPACPI_VOL_CAP_VOLMUTE, /* Output vol and mute */ 6499 TPACPI_VOL_CAP_MUTEONLY, /* Output mute only */ 6500 TPACPI_VOL_CAP_MAX 6501 }; 6502 6503 static enum tpacpi_volume_access_mode volume_mode = 6504 TPACPI_VOL_MODE_MAX; 6505 6506 static enum tpacpi_volume_capabilities volume_capabilities; 6507 static int volume_control_allowed; 6508 6509 /* 6510 * Used to syncronize writers to TP_EC_AUDIO and 6511 * TP_NVRAM_ADDR_MIXER, as we need to do read-modify-write 6512 */ 6513 static struct mutex volume_mutex; 6514 6515 static void tpacpi_volume_checkpoint_nvram(void) 6516 { 6517 u8 lec = 0; 6518 u8 b_nvram; 6519 u8 ec_mask; 6520 6521 if (volume_mode != TPACPI_VOL_MODE_ECNVRAM) 6522 return; 6523 if (!volume_control_allowed) 6524 return; 6525 6526 vdbg_printk(TPACPI_DBG_MIXER, 6527 "trying to checkpoint mixer state to NVRAM...\n"); 6528 6529 if (tp_features.mixer_no_level_control) 6530 ec_mask = TP_EC_AUDIO_MUTESW_MSK; 6531 else 6532 ec_mask = TP_EC_AUDIO_MUTESW_MSK | TP_EC_AUDIO_LVL_MSK; 6533 6534 if (mutex_lock_killable(&volume_mutex) < 0) 6535 return; 6536 6537 if (unlikely(!acpi_ec_read(TP_EC_AUDIO, &lec))) 6538 goto unlock; 6539 lec &= ec_mask; 6540 b_nvram = nvram_read_byte(TP_NVRAM_ADDR_MIXER); 6541 6542 if (lec != (b_nvram & ec_mask)) { 6543 /* NVRAM needs update */ 6544 b_nvram &= ~ec_mask; 6545 b_nvram |= lec; 6546 nvram_write_byte(b_nvram, TP_NVRAM_ADDR_MIXER); 6547 dbg_printk(TPACPI_DBG_MIXER, 6548 "updated NVRAM mixer status to 0x%02x (0x%02x)\n", 6549 (unsigned int) lec, (unsigned int) b_nvram); 6550 } else { 6551 vdbg_printk(TPACPI_DBG_MIXER, 6552 "NVRAM mixer status already is 0x%02x (0x%02x)\n", 6553 (unsigned int) lec, (unsigned int) b_nvram); 6554 } 6555 6556 unlock: 6557 mutex_unlock(&volume_mutex); 6558 } 6559 6560 static int volume_get_status_ec(u8 *status) 6561 { 6562 u8 s; 6563 6564 if (!acpi_ec_read(TP_EC_AUDIO, &s)) 6565 return -EIO; 6566 6567 *status = s; 6568 6569 dbg_printk(TPACPI_DBG_MIXER, "status 0x%02x\n", s); 6570 6571 return 0; 6572 } 6573 6574 static int volume_get_status(u8 *status) 6575 { 6576 return volume_get_status_ec(status); 6577 } 6578 6579 static int volume_set_status_ec(const u8 status) 6580 { 6581 if (!acpi_ec_write(TP_EC_AUDIO, status)) 6582 return -EIO; 6583 6584 dbg_printk(TPACPI_DBG_MIXER, "set EC mixer to 0x%02x\n", status); 6585 6586 return 0; 6587 } 6588 6589 static int volume_set_status(const u8 status) 6590 { 6591 return volume_set_status_ec(status); 6592 } 6593 6594 /* returns < 0 on error, 0 on no change, 1 on change */ 6595 static int __volume_set_mute_ec(const bool mute) 6596 { 6597 int rc; 6598 u8 s, n; 6599 6600 if (mutex_lock_killable(&volume_mutex) < 0) 6601 return -EINTR; 6602 6603 rc = volume_get_status_ec(&s); 6604 if (rc) 6605 goto unlock; 6606 6607 n = (mute) ? s | TP_EC_AUDIO_MUTESW_MSK : 6608 s & ~TP_EC_AUDIO_MUTESW_MSK; 6609 6610 if (n != s) { 6611 rc = volume_set_status_ec(n); 6612 if (!rc) 6613 rc = 1; 6614 } 6615 6616 unlock: 6617 mutex_unlock(&volume_mutex); 6618 return rc; 6619 } 6620 6621 static int volume_alsa_set_mute(const bool mute) 6622 { 6623 dbg_printk(TPACPI_DBG_MIXER, "ALSA: trying to %smute\n", 6624 (mute) ? "" : "un"); 6625 return __volume_set_mute_ec(mute); 6626 } 6627 6628 static int volume_set_mute(const bool mute) 6629 { 6630 int rc; 6631 6632 dbg_printk(TPACPI_DBG_MIXER, "trying to %smute\n", 6633 (mute) ? "" : "un"); 6634 6635 rc = __volume_set_mute_ec(mute); 6636 return (rc < 0) ? rc : 0; 6637 } 6638 6639 /* returns < 0 on error, 0 on no change, 1 on change */ 6640 static int __volume_set_volume_ec(const u8 vol) 6641 { 6642 int rc; 6643 u8 s, n; 6644 6645 if (vol > TP_EC_VOLUME_MAX) 6646 return -EINVAL; 6647 6648 if (mutex_lock_killable(&volume_mutex) < 0) 6649 return -EINTR; 6650 6651 rc = volume_get_status_ec(&s); 6652 if (rc) 6653 goto unlock; 6654 6655 n = (s & ~TP_EC_AUDIO_LVL_MSK) | vol; 6656 6657 if (n != s) { 6658 rc = volume_set_status_ec(n); 6659 if (!rc) 6660 rc = 1; 6661 } 6662 6663 unlock: 6664 mutex_unlock(&volume_mutex); 6665 return rc; 6666 } 6667 6668 static int volume_alsa_set_volume(const u8 vol) 6669 { 6670 dbg_printk(TPACPI_DBG_MIXER, 6671 "ALSA: trying to set volume level to %hu\n", vol); 6672 return __volume_set_volume_ec(vol); 6673 } 6674 6675 static void volume_alsa_notify_change(void) 6676 { 6677 struct tpacpi_alsa_data *d; 6678 6679 if (alsa_card && alsa_card->private_data) { 6680 d = alsa_card->private_data; 6681 if (d->ctl_mute_id) 6682 snd_ctl_notify(alsa_card, 6683 SNDRV_CTL_EVENT_MASK_VALUE, 6684 d->ctl_mute_id); 6685 if (d->ctl_vol_id) 6686 snd_ctl_notify(alsa_card, 6687 SNDRV_CTL_EVENT_MASK_VALUE, 6688 d->ctl_vol_id); 6689 } 6690 } 6691 6692 static int volume_alsa_vol_info(struct snd_kcontrol *kcontrol, 6693 struct snd_ctl_elem_info *uinfo) 6694 { 6695 uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 6696 uinfo->count = 1; 6697 uinfo->value.integer.min = 0; 6698 uinfo->value.integer.max = TP_EC_VOLUME_MAX; 6699 return 0; 6700 } 6701 6702 static int volume_alsa_vol_get(struct snd_kcontrol *kcontrol, 6703 struct snd_ctl_elem_value *ucontrol) 6704 { 6705 u8 s; 6706 int rc; 6707 6708 rc = volume_get_status(&s); 6709 if (rc < 0) 6710 return rc; 6711 6712 ucontrol->value.integer.value[0] = s & TP_EC_AUDIO_LVL_MSK; 6713 return 0; 6714 } 6715 6716 static int volume_alsa_vol_put(struct snd_kcontrol *kcontrol, 6717 struct snd_ctl_elem_value *ucontrol) 6718 { 6719 tpacpi_disclose_usertask("ALSA", "set volume to %ld\n", 6720 ucontrol->value.integer.value[0]); 6721 return volume_alsa_set_volume(ucontrol->value.integer.value[0]); 6722 } 6723 6724 #define volume_alsa_mute_info snd_ctl_boolean_mono_info 6725 6726 static int volume_alsa_mute_get(struct snd_kcontrol *kcontrol, 6727 struct snd_ctl_elem_value *ucontrol) 6728 { 6729 u8 s; 6730 int rc; 6731 6732 rc = volume_get_status(&s); 6733 if (rc < 0) 6734 return rc; 6735 6736 ucontrol->value.integer.value[0] = 6737 (s & TP_EC_AUDIO_MUTESW_MSK) ? 0 : 1; 6738 return 0; 6739 } 6740 6741 static int volume_alsa_mute_put(struct snd_kcontrol *kcontrol, 6742 struct snd_ctl_elem_value *ucontrol) 6743 { 6744 tpacpi_disclose_usertask("ALSA", "%smute\n", 6745 ucontrol->value.integer.value[0] ? 6746 "un" : ""); 6747 return volume_alsa_set_mute(!ucontrol->value.integer.value[0]); 6748 } 6749 6750 static struct snd_kcontrol_new volume_alsa_control_vol __devinitdata = { 6751 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6752 .name = "Console Playback Volume", 6753 .index = 0, 6754 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6755 .info = volume_alsa_vol_info, 6756 .get = volume_alsa_vol_get, 6757 }; 6758 6759 static struct snd_kcontrol_new volume_alsa_control_mute __devinitdata = { 6760 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 6761 .name = "Console Playback Switch", 6762 .index = 0, 6763 .access = SNDRV_CTL_ELEM_ACCESS_READ, 6764 .info = volume_alsa_mute_info, 6765 .get = volume_alsa_mute_get, 6766 }; 6767 6768 static void volume_suspend(pm_message_t state) 6769 { 6770 tpacpi_volume_checkpoint_nvram(); 6771 } 6772 6773 static void volume_resume(void) 6774 { 6775 volume_alsa_notify_change(); 6776 } 6777 6778 static void volume_shutdown(void) 6779 { 6780 tpacpi_volume_checkpoint_nvram(); 6781 } 6782 6783 static void volume_exit(void) 6784 { 6785 if (alsa_card) { 6786 snd_card_free(alsa_card); 6787 alsa_card = NULL; 6788 } 6789 6790 tpacpi_volume_checkpoint_nvram(); 6791 } 6792 6793 static int __init volume_create_alsa_mixer(void) 6794 { 6795 struct snd_card *card; 6796 struct tpacpi_alsa_data *data; 6797 struct snd_kcontrol *ctl_vol; 6798 struct snd_kcontrol *ctl_mute; 6799 int rc; 6800 6801 rc = snd_card_create(alsa_index, alsa_id, THIS_MODULE, 6802 sizeof(struct tpacpi_alsa_data), &card); 6803 if (rc < 0 || !card) { 6804 printk(TPACPI_ERR 6805 "Failed to create ALSA card structures: %d\n", rc); 6806 return 1; 6807 } 6808 6809 BUG_ON(!card->private_data); 6810 data = card->private_data; 6811 data->card = card; 6812 6813 strlcpy(card->driver, TPACPI_ALSA_DRVNAME, 6814 sizeof(card->driver)); 6815 strlcpy(card->shortname, TPACPI_ALSA_SHRTNAME, 6816 sizeof(card->shortname)); 6817 snprintf(card->mixername, sizeof(card->mixername), "ThinkPad EC %s", 6818 (thinkpad_id.ec_version_str) ? 6819 thinkpad_id.ec_version_str : "(unknown)"); 6820 snprintf(card->longname, sizeof(card->longname), 6821 "%s at EC reg 0x%02x, fw %s", card->shortname, TP_EC_AUDIO, 6822 (thinkpad_id.ec_version_str) ? 6823 thinkpad_id.ec_version_str : "unknown"); 6824 6825 if (volume_control_allowed) { 6826 volume_alsa_control_vol.put = volume_alsa_vol_put; 6827 volume_alsa_control_vol.access = 6828 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6829 6830 volume_alsa_control_mute.put = volume_alsa_mute_put; 6831 volume_alsa_control_mute.access = 6832 SNDRV_CTL_ELEM_ACCESS_READWRITE; 6833 } 6834 6835 if (!tp_features.mixer_no_level_control) { 6836 ctl_vol = snd_ctl_new1(&volume_alsa_control_vol, NULL); 6837 rc = snd_ctl_add(card, ctl_vol); 6838 if (rc < 0) { 6839 printk(TPACPI_ERR 6840 "Failed to create ALSA volume control: %d\n", 6841 rc); 6842 goto err_exit; 6843 } 6844 data->ctl_vol_id = &ctl_vol->id; 6845 } 6846 6847 ctl_mute = snd_ctl_new1(&volume_alsa_control_mute, NULL); 6848 rc = snd_ctl_add(card, ctl_mute); 6849 if (rc < 0) { 6850 printk(TPACPI_ERR "Failed to create ALSA mute control: %d\n", 6851 rc); 6852 goto err_exit; 6853 } 6854 data->ctl_mute_id = &ctl_mute->id; 6855 6856 snd_card_set_dev(card, &tpacpi_pdev->dev); 6857 rc = snd_card_register(card); 6858 if (rc < 0) { 6859 printk(TPACPI_ERR "Failed to register ALSA card: %d\n", rc); 6860 goto err_exit; 6861 } 6862 6863 alsa_card = card; 6864 return 0; 6865 6866 err_exit: 6867 snd_card_free(card); 6868 return 1; 6869 } 6870 6871 #define TPACPI_VOL_Q_MUTEONLY 0x0001 /* Mute-only control available */ 6872 #define TPACPI_VOL_Q_LEVEL 0x0002 /* Volume control available */ 6873 6874 static const struct tpacpi_quirk volume_quirk_table[] __initconst = { 6875 /* Whitelist volume level on all IBM by default */ 6876 { .vendor = PCI_VENDOR_ID_IBM, 6877 .bios = TPACPI_MATCH_ANY, 6878 .ec = TPACPI_MATCH_ANY, 6879 .quirks = TPACPI_VOL_Q_LEVEL }, 6880 6881 /* Lenovo models with volume control (needs confirmation) */ 6882 TPACPI_QEC_LNV('7', 'C', TPACPI_VOL_Q_LEVEL), /* R60/i */ 6883 TPACPI_QEC_LNV('7', 'E', TPACPI_VOL_Q_LEVEL), /* R60e/i */ 6884 TPACPI_QEC_LNV('7', '9', TPACPI_VOL_Q_LEVEL), /* T60/p */ 6885 TPACPI_QEC_LNV('7', 'B', TPACPI_VOL_Q_LEVEL), /* X60/s */ 6886 TPACPI_QEC_LNV('7', 'J', TPACPI_VOL_Q_LEVEL), /* X60t */ 6887 TPACPI_QEC_LNV('7', '7', TPACPI_VOL_Q_LEVEL), /* Z60 */ 6888 TPACPI_QEC_LNV('7', 'F', TPACPI_VOL_Q_LEVEL), /* Z61 */ 6889 6890 /* Whitelist mute-only on all Lenovo by default */ 6891 { .vendor = PCI_VENDOR_ID_LENOVO, 6892 .bios = TPACPI_MATCH_ANY, 6893 .ec = TPACPI_MATCH_ANY, 6894 .quirks = TPACPI_VOL_Q_MUTEONLY } 6895 }; 6896 6897 static int __init volume_init(struct ibm_init_struct *iibm) 6898 { 6899 unsigned long quirks; 6900 int rc; 6901 6902 vdbg_printk(TPACPI_DBG_INIT, "initializing volume subdriver\n"); 6903 6904 mutex_init(&volume_mutex); 6905 6906 /* 6907 * Check for module parameter bogosity, note that we 6908 * init volume_mode to TPACPI_VOL_MODE_MAX in order to be 6909 * able to detect "unspecified" 6910 */ 6911 if (volume_mode > TPACPI_VOL_MODE_MAX) 6912 return -EINVAL; 6913 6914 if (volume_mode == TPACPI_VOL_MODE_UCMS_STEP) { 6915 printk(TPACPI_ERR 6916 "UCMS step volume mode not implemented, " 6917 "please contact %s\n", TPACPI_MAIL); 6918 return 1; 6919 } 6920 6921 if (volume_capabilities >= TPACPI_VOL_CAP_MAX) 6922 return -EINVAL; 6923 6924 /* 6925 * The ALSA mixer is our primary interface. 6926 * When disabled, don't install the subdriver at all 6927 */ 6928 if (!alsa_enable) { 6929 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6930 "ALSA mixer disabled by parameter, " 6931 "not loading volume subdriver...\n"); 6932 return 1; 6933 } 6934 6935 quirks = tpacpi_check_quirks(volume_quirk_table, 6936 ARRAY_SIZE(volume_quirk_table)); 6937 6938 switch (volume_capabilities) { 6939 case TPACPI_VOL_CAP_AUTO: 6940 if (quirks & TPACPI_VOL_Q_MUTEONLY) 6941 tp_features.mixer_no_level_control = 1; 6942 else if (quirks & TPACPI_VOL_Q_LEVEL) 6943 tp_features.mixer_no_level_control = 0; 6944 else 6945 return 1; /* no mixer */ 6946 break; 6947 case TPACPI_VOL_CAP_VOLMUTE: 6948 tp_features.mixer_no_level_control = 0; 6949 break; 6950 case TPACPI_VOL_CAP_MUTEONLY: 6951 tp_features.mixer_no_level_control = 1; 6952 break; 6953 default: 6954 return 1; 6955 } 6956 6957 if (volume_capabilities != TPACPI_VOL_CAP_AUTO) 6958 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6959 "using user-supplied volume_capabilities=%d\n", 6960 volume_capabilities); 6961 6962 if (volume_mode == TPACPI_VOL_MODE_AUTO || 6963 volume_mode == TPACPI_VOL_MODE_MAX) { 6964 volume_mode = TPACPI_VOL_MODE_ECNVRAM; 6965 6966 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6967 "driver auto-selected volume_mode=%d\n", 6968 volume_mode); 6969 } else { 6970 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6971 "using user-supplied volume_mode=%d\n", 6972 volume_mode); 6973 } 6974 6975 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6976 "mute is supported, volume control is %s\n", 6977 str_supported(!tp_features.mixer_no_level_control)); 6978 6979 rc = volume_create_alsa_mixer(); 6980 if (rc) { 6981 printk(TPACPI_ERR 6982 "Could not create the ALSA mixer interface\n"); 6983 return rc; 6984 } 6985 6986 printk(TPACPI_INFO 6987 "Console audio control enabled, mode: %s\n", 6988 (volume_control_allowed) ? 6989 "override (read/write)" : 6990 "monitor (read only)"); 6991 6992 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_MIXER, 6993 "registering volume hotkeys as change notification\n"); 6994 tpacpi_hotkey_driver_mask_set(hotkey_driver_mask 6995 | TP_ACPI_HKEY_VOLUP_MASK 6996 | TP_ACPI_HKEY_VOLDWN_MASK 6997 | TP_ACPI_HKEY_MUTE_MASK); 6998 6999 return 0; 7000 } 7001 7002 static int volume_read(struct seq_file *m) 7003 { 7004 u8 status; 7005 7006 if (volume_get_status(&status) < 0) { 7007 seq_printf(m, "level:\t\tunreadable\n"); 7008 } else { 7009 if (tp_features.mixer_no_level_control) 7010 seq_printf(m, "level:\t\tunsupported\n"); 7011 else 7012 seq_printf(m, "level:\t\t%d\n", 7013 status & TP_EC_AUDIO_LVL_MSK); 7014 7015 seq_printf(m, "mute:\t\t%s\n", 7016 onoff(status, TP_EC_AUDIO_MUTESW)); 7017 7018 if (volume_control_allowed) { 7019 seq_printf(m, "commands:\tunmute, mute\n"); 7020 if (!tp_features.mixer_no_level_control) { 7021 seq_printf(m, 7022 "commands:\tup, down\n"); 7023 seq_printf(m, 7024 "commands:\tlevel <level>" 7025 " (<level> is 0-%d)\n", 7026 TP_EC_VOLUME_MAX); 7027 } 7028 } 7029 } 7030 7031 return 0; 7032 } 7033 7034 static int volume_write(char *buf) 7035 { 7036 u8 s; 7037 u8 new_level, new_mute; 7038 int l; 7039 char *cmd; 7040 int rc; 7041 7042 /* 7043 * We do allow volume control at driver startup, so that the 7044 * user can set initial state through the volume=... parameter hack. 7045 */ 7046 if (!volume_control_allowed && tpacpi_lifecycle != TPACPI_LIFE_INIT) { 7047 if (unlikely(!tp_warned.volume_ctrl_forbidden)) { 7048 tp_warned.volume_ctrl_forbidden = 1; 7049 printk(TPACPI_NOTICE 7050 "Console audio control in monitor mode, " 7051 "changes are not allowed.\n"); 7052 printk(TPACPI_NOTICE 7053 "Use the volume_control=1 module parameter " 7054 "to enable volume control\n"); 7055 } 7056 return -EPERM; 7057 } 7058 7059 rc = volume_get_status(&s); 7060 if (rc < 0) 7061 return rc; 7062 7063 new_level = s & TP_EC_AUDIO_LVL_MSK; 7064 new_mute = s & TP_EC_AUDIO_MUTESW_MSK; 7065 7066 while ((cmd = next_cmd(&buf))) { 7067 if (!tp_features.mixer_no_level_control) { 7068 if (strlencmp(cmd, "up") == 0) { 7069 if (new_mute) 7070 new_mute = 0; 7071 else if (new_level < TP_EC_VOLUME_MAX) 7072 new_level++; 7073 continue; 7074 } else if (strlencmp(cmd, "down") == 0) { 7075 if (new_mute) 7076 new_mute = 0; 7077 else if (new_level > 0) 7078 new_level--; 7079 continue; 7080 } else if (sscanf(cmd, "level %u", &l) == 1 && 7081 l >= 0 && l <= TP_EC_VOLUME_MAX) { 7082 new_level = l; 7083 continue; 7084 } 7085 } 7086 if (strlencmp(cmd, "mute") == 0) 7087 new_mute = TP_EC_AUDIO_MUTESW_MSK; 7088 else if (strlencmp(cmd, "unmute") == 0) 7089 new_mute = 0; 7090 else 7091 return -EINVAL; 7092 } 7093 7094 if (tp_features.mixer_no_level_control) { 7095 tpacpi_disclose_usertask("procfs volume", "%smute\n", 7096 new_mute ? "" : "un"); 7097 rc = volume_set_mute(!!new_mute); 7098 } else { 7099 tpacpi_disclose_usertask("procfs volume", 7100 "%smute and set level to %d\n", 7101 new_mute ? "" : "un", new_level); 7102 rc = volume_set_status(new_mute | new_level); 7103 } 7104 volume_alsa_notify_change(); 7105 7106 return (rc == -EINTR) ? -ERESTARTSYS : rc; 7107 } 7108 7109 static struct ibm_struct volume_driver_data = { 7110 .name = "volume", 7111 .read = volume_read, 7112 .write = volume_write, 7113 .exit = volume_exit, 7114 .suspend = volume_suspend, 7115 .resume = volume_resume, 7116 .shutdown = volume_shutdown, 7117 }; 7118 7119 #else /* !CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7120 7121 #define alsa_card NULL 7122 7123 static void inline volume_alsa_notify_change(void) 7124 { 7125 } 7126 7127 static int __init volume_init(struct ibm_init_struct *iibm) 7128 { 7129 printk(TPACPI_INFO 7130 "volume: disabled as there is no ALSA support in this kernel\n"); 7131 7132 return 1; 7133 } 7134 7135 static struct ibm_struct volume_driver_data = { 7136 .name = "volume", 7137 }; 7138 7139 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 7140 7141 /************************************************************************* 7142 * Fan subdriver 7143 */ 7144 7145 /* 7146 * FAN ACCESS MODES 7147 * 7148 * TPACPI_FAN_RD_ACPI_GFAN: 7149 * ACPI GFAN method: returns fan level 7150 * 7151 * see TPACPI_FAN_WR_ACPI_SFAN 7152 * EC 0x2f (HFSP) not available if GFAN exists 7153 * 7154 * TPACPI_FAN_WR_ACPI_SFAN: 7155 * ACPI SFAN method: sets fan level, 0 (stop) to 7 (max) 7156 * 7157 * EC 0x2f (HFSP) might be available *for reading*, but do not use 7158 * it for writing. 7159 * 7160 * TPACPI_FAN_WR_TPEC: 7161 * ThinkPad EC register 0x2f (HFSP): fan control loop mode 7162 * Supported on almost all ThinkPads 7163 * 7164 * Fan speed changes of any sort (including those caused by the 7165 * disengaged mode) are usually done slowly by the firmware as the 7166 * maximum amount of fan duty cycle change per second seems to be 7167 * limited. 7168 * 7169 * Reading is not available if GFAN exists. 7170 * Writing is not available if SFAN exists. 7171 * 7172 * Bits 7173 * 7 automatic mode engaged; 7174 * (default operation mode of the ThinkPad) 7175 * fan level is ignored in this mode. 7176 * 6 full speed mode (takes precedence over bit 7); 7177 * not available on all thinkpads. May disable 7178 * the tachometer while the fan controller ramps up 7179 * the speed (which can take up to a few *minutes*). 7180 * Speeds up fan to 100% duty-cycle, which is far above 7181 * the standard RPM levels. It is not impossible that 7182 * it could cause hardware damage. 7183 * 5-3 unused in some models. Extra bits for fan level 7184 * in others, but still useless as all values above 7185 * 7 map to the same speed as level 7 in these models. 7186 * 2-0 fan level (0..7 usually) 7187 * 0x00 = stop 7188 * 0x07 = max (set when temperatures critical) 7189 * Some ThinkPads may have other levels, see 7190 * TPACPI_FAN_WR_ACPI_FANS (X31/X40/X41) 7191 * 7192 * FIRMWARE BUG: on some models, EC 0x2f might not be initialized at 7193 * boot. Apparently the EC does not initialize it, so unless ACPI DSDT 7194 * does so, its initial value is meaningless (0x07). 7195 * 7196 * For firmware bugs, refer to: 7197 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7198 * 7199 * ---- 7200 * 7201 * ThinkPad EC register 0x84 (LSB), 0x85 (MSB): 7202 * Main fan tachometer reading (in RPM) 7203 * 7204 * This register is present on all ThinkPads with a new-style EC, and 7205 * it is known not to be present on the A21m/e, and T22, as there is 7206 * something else in offset 0x84 according to the ACPI DSDT. Other 7207 * ThinkPads from this same time period (and earlier) probably lack the 7208 * tachometer as well. 7209 * 7210 * Unfortunately a lot of ThinkPads with new-style ECs but whose firmware 7211 * was never fixed by IBM to report the EC firmware version string 7212 * probably support the tachometer (like the early X models), so 7213 * detecting it is quite hard. We need more data to know for sure. 7214 * 7215 * FIRMWARE BUG: always read 0x84 first, otherwise incorrect readings 7216 * might result. 7217 * 7218 * FIRMWARE BUG: may go stale while the EC is switching to full speed 7219 * mode. 7220 * 7221 * For firmware bugs, refer to: 7222 * http://thinkwiki.org/wiki/Embedded_Controller_Firmware#Firmware_Issues 7223 * 7224 * ---- 7225 * 7226 * ThinkPad EC register 0x31 bit 0 (only on select models) 7227 * 7228 * When bit 0 of EC register 0x31 is zero, the tachometer registers 7229 * show the speed of the main fan. When bit 0 of EC register 0x31 7230 * is one, the tachometer registers show the speed of the auxiliary 7231 * fan. 7232 * 7233 * Fan control seems to affect both fans, regardless of the state 7234 * of this bit. 7235 * 7236 * So far, only the firmware for the X60/X61 non-tablet versions 7237 * seem to support this (firmware TP-7M). 7238 * 7239 * TPACPI_FAN_WR_ACPI_FANS: 7240 * ThinkPad X31, X40, X41. Not available in the X60. 7241 * 7242 * FANS ACPI handle: takes three arguments: low speed, medium speed, 7243 * high speed. ACPI DSDT seems to map these three speeds to levels 7244 * as follows: STOP LOW LOW MED MED HIGH HIGH HIGH HIGH 7245 * (this map is stored on FAN0..FAN8 as "0,1,1,2,2,3,3,3,3") 7246 * 7247 * The speeds are stored on handles 7248 * (FANA:FAN9), (FANC:FANB), (FANE:FAND). 7249 * 7250 * There are three default speed sets, accessible as handles: 7251 * FS1L,FS1M,FS1H; FS2L,FS2M,FS2H; FS3L,FS3M,FS3H 7252 * 7253 * ACPI DSDT switches which set is in use depending on various 7254 * factors. 7255 * 7256 * TPACPI_FAN_WR_TPEC is also available and should be used to 7257 * command the fan. The X31/X40/X41 seems to have 8 fan levels, 7258 * but the ACPI tables just mention level 7. 7259 */ 7260 7261 enum { /* Fan control constants */ 7262 fan_status_offset = 0x2f, /* EC register 0x2f */ 7263 fan_rpm_offset = 0x84, /* EC register 0x84: LSB, 0x85 MSB (RPM) 7264 * 0x84 must be read before 0x85 */ 7265 fan_select_offset = 0x31, /* EC register 0x31 (Firmware 7M) 7266 bit 0 selects which fan is active */ 7267 7268 TP_EC_FAN_FULLSPEED = 0x40, /* EC fan mode: full speed */ 7269 TP_EC_FAN_AUTO = 0x80, /* EC fan mode: auto fan control */ 7270 7271 TPACPI_FAN_LAST_LEVEL = 0x100, /* Use cached last-seen fan level */ 7272 }; 7273 7274 enum fan_status_access_mode { 7275 TPACPI_FAN_NONE = 0, /* No fan status or control */ 7276 TPACPI_FAN_RD_ACPI_GFAN, /* Use ACPI GFAN */ 7277 TPACPI_FAN_RD_TPEC, /* Use ACPI EC regs 0x2f, 0x84-0x85 */ 7278 }; 7279 7280 enum fan_control_access_mode { 7281 TPACPI_FAN_WR_NONE = 0, /* No fan control */ 7282 TPACPI_FAN_WR_ACPI_SFAN, /* Use ACPI SFAN */ 7283 TPACPI_FAN_WR_TPEC, /* Use ACPI EC reg 0x2f */ 7284 TPACPI_FAN_WR_ACPI_FANS, /* Use ACPI FANS and EC reg 0x2f */ 7285 }; 7286 7287 enum fan_control_commands { 7288 TPACPI_FAN_CMD_SPEED = 0x0001, /* speed command */ 7289 TPACPI_FAN_CMD_LEVEL = 0x0002, /* level command */ 7290 TPACPI_FAN_CMD_ENABLE = 0x0004, /* enable/disable cmd, 7291 * and also watchdog cmd */ 7292 }; 7293 7294 static int fan_control_allowed; 7295 7296 static enum fan_status_access_mode fan_status_access_mode; 7297 static enum fan_control_access_mode fan_control_access_mode; 7298 static enum fan_control_commands fan_control_commands; 7299 7300 static u8 fan_control_initial_status; 7301 static u8 fan_control_desired_level; 7302 static u8 fan_control_resume_level; 7303 static int fan_watchdog_maxinterval; 7304 7305 static struct mutex fan_mutex; 7306 7307 static void fan_watchdog_fire(struct work_struct *ignored); 7308 static DECLARE_DELAYED_WORK(fan_watchdog_task, fan_watchdog_fire); 7309 7310 TPACPI_HANDLE(fans, ec, "FANS"); /* X31, X40, X41 */ 7311 TPACPI_HANDLE(gfan, ec, "GFAN", /* 570 */ 7312 "\\FSPD", /* 600e/x, 770e, 770x */ 7313 ); /* all others */ 7314 TPACPI_HANDLE(sfan, ec, "SFAN", /* 570 */ 7315 "JFNS", /* 770x-JL */ 7316 ); /* all others */ 7317 7318 /* 7319 * Unitialized HFSP quirk: ACPI DSDT and EC fail to initialize the 7320 * HFSP register at boot, so it contains 0x07 but the Thinkpad could 7321 * be in auto mode (0x80). 7322 * 7323 * This is corrected by any write to HFSP either by the driver, or 7324 * by the firmware. 7325 * 7326 * We assume 0x07 really means auto mode while this quirk is active, 7327 * as this is far more likely than the ThinkPad being in level 7, 7328 * which is only used by the firmware during thermal emergencies. 7329 * 7330 * Enable for TP-1Y (T43), TP-78 (R51e), TP-76 (R52), 7331 * TP-70 (T43, R52), which are known to be buggy. 7332 */ 7333 7334 static void fan_quirk1_setup(void) 7335 { 7336 if (fan_control_initial_status == 0x07) { 7337 printk(TPACPI_NOTICE 7338 "fan_init: initial fan status is unknown, " 7339 "assuming it is in auto mode\n"); 7340 tp_features.fan_ctrl_status_undef = 1; 7341 } 7342 } 7343 7344 static void fan_quirk1_handle(u8 *fan_status) 7345 { 7346 if (unlikely(tp_features.fan_ctrl_status_undef)) { 7347 if (*fan_status != fan_control_initial_status) { 7348 /* something changed the HFSP regisnter since 7349 * driver init time, so it is not undefined 7350 * anymore */ 7351 tp_features.fan_ctrl_status_undef = 0; 7352 } else { 7353 /* Return most likely status. In fact, it 7354 * might be the only possible status */ 7355 *fan_status = TP_EC_FAN_AUTO; 7356 } 7357 } 7358 } 7359 7360 /* Select main fan on X60/X61, NOOP on others */ 7361 static bool fan_select_fan1(void) 7362 { 7363 if (tp_features.second_fan) { 7364 u8 val; 7365 7366 if (ec_read(fan_select_offset, &val) < 0) 7367 return false; 7368 val &= 0xFEU; 7369 if (ec_write(fan_select_offset, val) < 0) 7370 return false; 7371 } 7372 return true; 7373 } 7374 7375 /* Select secondary fan on X60/X61 */ 7376 static bool fan_select_fan2(void) 7377 { 7378 u8 val; 7379 7380 if (!tp_features.second_fan) 7381 return false; 7382 7383 if (ec_read(fan_select_offset, &val) < 0) 7384 return false; 7385 val |= 0x01U; 7386 if (ec_write(fan_select_offset, val) < 0) 7387 return false; 7388 7389 return true; 7390 } 7391 7392 /* 7393 * Call with fan_mutex held 7394 */ 7395 static void fan_update_desired_level(u8 status) 7396 { 7397 if ((status & 7398 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7399 if (status > 7) 7400 fan_control_desired_level = 7; 7401 else 7402 fan_control_desired_level = status; 7403 } 7404 } 7405 7406 static int fan_get_status(u8 *status) 7407 { 7408 u8 s; 7409 7410 /* TODO: 7411 * Add TPACPI_FAN_RD_ACPI_FANS ? */ 7412 7413 switch (fan_status_access_mode) { 7414 case TPACPI_FAN_RD_ACPI_GFAN: 7415 /* 570, 600e/x, 770e, 770x */ 7416 7417 if (unlikely(!acpi_evalf(gfan_handle, &s, NULL, "d"))) 7418 return -EIO; 7419 7420 if (likely(status)) 7421 *status = s & 0x07; 7422 7423 break; 7424 7425 case TPACPI_FAN_RD_TPEC: 7426 /* all except 570, 600e/x, 770e, 770x */ 7427 if (unlikely(!acpi_ec_read(fan_status_offset, &s))) 7428 return -EIO; 7429 7430 if (likely(status)) { 7431 *status = s; 7432 fan_quirk1_handle(status); 7433 } 7434 7435 break; 7436 7437 default: 7438 return -ENXIO; 7439 } 7440 7441 return 0; 7442 } 7443 7444 static int fan_get_status_safe(u8 *status) 7445 { 7446 int rc; 7447 u8 s; 7448 7449 if (mutex_lock_killable(&fan_mutex)) 7450 return -ERESTARTSYS; 7451 rc = fan_get_status(&s); 7452 if (!rc) 7453 fan_update_desired_level(s); 7454 mutex_unlock(&fan_mutex); 7455 7456 if (status) 7457 *status = s; 7458 7459 return rc; 7460 } 7461 7462 static int fan_get_speed(unsigned int *speed) 7463 { 7464 u8 hi, lo; 7465 7466 switch (fan_status_access_mode) { 7467 case TPACPI_FAN_RD_TPEC: 7468 /* all except 570, 600e/x, 770e, 770x */ 7469 if (unlikely(!fan_select_fan1())) 7470 return -EIO; 7471 if (unlikely(!acpi_ec_read(fan_rpm_offset, &lo) || 7472 !acpi_ec_read(fan_rpm_offset + 1, &hi))) 7473 return -EIO; 7474 7475 if (likely(speed)) 7476 *speed = (hi << 8) | lo; 7477 7478 break; 7479 7480 default: 7481 return -ENXIO; 7482 } 7483 7484 return 0; 7485 } 7486 7487 static int fan2_get_speed(unsigned int *speed) 7488 { 7489 u8 hi, lo; 7490 bool rc; 7491 7492 switch (fan_status_access_mode) { 7493 case TPACPI_FAN_RD_TPEC: 7494 /* all except 570, 600e/x, 770e, 770x */ 7495 if (unlikely(!fan_select_fan2())) 7496 return -EIO; 7497 rc = !acpi_ec_read(fan_rpm_offset, &lo) || 7498 !acpi_ec_read(fan_rpm_offset + 1, &hi); 7499 fan_select_fan1(); /* play it safe */ 7500 if (rc) 7501 return -EIO; 7502 7503 if (likely(speed)) 7504 *speed = (hi << 8) | lo; 7505 7506 break; 7507 7508 default: 7509 return -ENXIO; 7510 } 7511 7512 return 0; 7513 } 7514 7515 static int fan_set_level(int level) 7516 { 7517 if (!fan_control_allowed) 7518 return -EPERM; 7519 7520 switch (fan_control_access_mode) { 7521 case TPACPI_FAN_WR_ACPI_SFAN: 7522 if (level >= 0 && level <= 7) { 7523 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", level)) 7524 return -EIO; 7525 } else 7526 return -EINVAL; 7527 break; 7528 7529 case TPACPI_FAN_WR_ACPI_FANS: 7530 case TPACPI_FAN_WR_TPEC: 7531 if (!(level & TP_EC_FAN_AUTO) && 7532 !(level & TP_EC_FAN_FULLSPEED) && 7533 ((level < 0) || (level > 7))) 7534 return -EINVAL; 7535 7536 /* safety net should the EC not support AUTO 7537 * or FULLSPEED mode bits and just ignore them */ 7538 if (level & TP_EC_FAN_FULLSPEED) 7539 level |= 7; /* safety min speed 7 */ 7540 else if (level & TP_EC_FAN_AUTO) 7541 level |= 4; /* safety min speed 4 */ 7542 7543 if (!acpi_ec_write(fan_status_offset, level)) 7544 return -EIO; 7545 else 7546 tp_features.fan_ctrl_status_undef = 0; 7547 break; 7548 7549 default: 7550 return -ENXIO; 7551 } 7552 7553 vdbg_printk(TPACPI_DBG_FAN, 7554 "fan control: set fan control register to 0x%02x\n", level); 7555 return 0; 7556 } 7557 7558 static int fan_set_level_safe(int level) 7559 { 7560 int rc; 7561 7562 if (!fan_control_allowed) 7563 return -EPERM; 7564 7565 if (mutex_lock_killable(&fan_mutex)) 7566 return -ERESTARTSYS; 7567 7568 if (level == TPACPI_FAN_LAST_LEVEL) 7569 level = fan_control_desired_level; 7570 7571 rc = fan_set_level(level); 7572 if (!rc) 7573 fan_update_desired_level(level); 7574 7575 mutex_unlock(&fan_mutex); 7576 return rc; 7577 } 7578 7579 static int fan_set_enable(void) 7580 { 7581 u8 s; 7582 int rc; 7583 7584 if (!fan_control_allowed) 7585 return -EPERM; 7586 7587 if (mutex_lock_killable(&fan_mutex)) 7588 return -ERESTARTSYS; 7589 7590 switch (fan_control_access_mode) { 7591 case TPACPI_FAN_WR_ACPI_FANS: 7592 case TPACPI_FAN_WR_TPEC: 7593 rc = fan_get_status(&s); 7594 if (rc < 0) 7595 break; 7596 7597 /* Don't go out of emergency fan mode */ 7598 if (s != 7) { 7599 s &= 0x07; 7600 s |= TP_EC_FAN_AUTO | 4; /* min fan speed 4 */ 7601 } 7602 7603 if (!acpi_ec_write(fan_status_offset, s)) 7604 rc = -EIO; 7605 else { 7606 tp_features.fan_ctrl_status_undef = 0; 7607 rc = 0; 7608 } 7609 break; 7610 7611 case TPACPI_FAN_WR_ACPI_SFAN: 7612 rc = fan_get_status(&s); 7613 if (rc < 0) 7614 break; 7615 7616 s &= 0x07; 7617 7618 /* Set fan to at least level 4 */ 7619 s |= 4; 7620 7621 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", s)) 7622 rc = -EIO; 7623 else 7624 rc = 0; 7625 break; 7626 7627 default: 7628 rc = -ENXIO; 7629 } 7630 7631 mutex_unlock(&fan_mutex); 7632 7633 if (!rc) 7634 vdbg_printk(TPACPI_DBG_FAN, 7635 "fan control: set fan control register to 0x%02x\n", 7636 s); 7637 return rc; 7638 } 7639 7640 static int fan_set_disable(void) 7641 { 7642 int rc; 7643 7644 if (!fan_control_allowed) 7645 return -EPERM; 7646 7647 if (mutex_lock_killable(&fan_mutex)) 7648 return -ERESTARTSYS; 7649 7650 rc = 0; 7651 switch (fan_control_access_mode) { 7652 case TPACPI_FAN_WR_ACPI_FANS: 7653 case TPACPI_FAN_WR_TPEC: 7654 if (!acpi_ec_write(fan_status_offset, 0x00)) 7655 rc = -EIO; 7656 else { 7657 fan_control_desired_level = 0; 7658 tp_features.fan_ctrl_status_undef = 0; 7659 } 7660 break; 7661 7662 case TPACPI_FAN_WR_ACPI_SFAN: 7663 if (!acpi_evalf(sfan_handle, NULL, NULL, "vd", 0x00)) 7664 rc = -EIO; 7665 else 7666 fan_control_desired_level = 0; 7667 break; 7668 7669 default: 7670 rc = -ENXIO; 7671 } 7672 7673 if (!rc) 7674 vdbg_printk(TPACPI_DBG_FAN, 7675 "fan control: set fan control register to 0\n"); 7676 7677 mutex_unlock(&fan_mutex); 7678 return rc; 7679 } 7680 7681 static int fan_set_speed(int speed) 7682 { 7683 int rc; 7684 7685 if (!fan_control_allowed) 7686 return -EPERM; 7687 7688 if (mutex_lock_killable(&fan_mutex)) 7689 return -ERESTARTSYS; 7690 7691 rc = 0; 7692 switch (fan_control_access_mode) { 7693 case TPACPI_FAN_WR_ACPI_FANS: 7694 if (speed >= 0 && speed <= 65535) { 7695 if (!acpi_evalf(fans_handle, NULL, NULL, "vddd", 7696 speed, speed, speed)) 7697 rc = -EIO; 7698 } else 7699 rc = -EINVAL; 7700 break; 7701 7702 default: 7703 rc = -ENXIO; 7704 } 7705 7706 mutex_unlock(&fan_mutex); 7707 return rc; 7708 } 7709 7710 static void fan_watchdog_reset(void) 7711 { 7712 static int fan_watchdog_active; 7713 7714 if (fan_control_access_mode == TPACPI_FAN_WR_NONE) 7715 return; 7716 7717 if (fan_watchdog_active) 7718 cancel_delayed_work(&fan_watchdog_task); 7719 7720 if (fan_watchdog_maxinterval > 0 && 7721 tpacpi_lifecycle != TPACPI_LIFE_EXITING) { 7722 fan_watchdog_active = 1; 7723 if (!queue_delayed_work(tpacpi_wq, &fan_watchdog_task, 7724 msecs_to_jiffies(fan_watchdog_maxinterval 7725 * 1000))) { 7726 printk(TPACPI_ERR 7727 "failed to queue the fan watchdog, " 7728 "watchdog will not trigger\n"); 7729 } 7730 } else 7731 fan_watchdog_active = 0; 7732 } 7733 7734 static void fan_watchdog_fire(struct work_struct *ignored) 7735 { 7736 int rc; 7737 7738 if (tpacpi_lifecycle != TPACPI_LIFE_RUNNING) 7739 return; 7740 7741 printk(TPACPI_NOTICE "fan watchdog: enabling fan\n"); 7742 rc = fan_set_enable(); 7743 if (rc < 0) { 7744 printk(TPACPI_ERR "fan watchdog: error %d while enabling fan, " 7745 "will try again later...\n", -rc); 7746 /* reschedule for later */ 7747 fan_watchdog_reset(); 7748 } 7749 } 7750 7751 /* 7752 * SYSFS fan layout: hwmon compatible (device) 7753 * 7754 * pwm*_enable: 7755 * 0: "disengaged" mode 7756 * 1: manual mode 7757 * 2: native EC "auto" mode (recommended, hardware default) 7758 * 7759 * pwm*: set speed in manual mode, ignored otherwise. 7760 * 0 is level 0; 255 is level 7. Intermediate points done with linear 7761 * interpolation. 7762 * 7763 * fan*_input: tachometer reading, RPM 7764 * 7765 * 7766 * SYSFS fan layout: extensions 7767 * 7768 * fan_watchdog (driver): 7769 * fan watchdog interval in seconds, 0 disables (default), max 120 7770 */ 7771 7772 /* sysfs fan pwm1_enable ----------------------------------------------- */ 7773 static ssize_t fan_pwm1_enable_show(struct device *dev, 7774 struct device_attribute *attr, 7775 char *buf) 7776 { 7777 int res, mode; 7778 u8 status; 7779 7780 res = fan_get_status_safe(&status); 7781 if (res) 7782 return res; 7783 7784 if (status & TP_EC_FAN_FULLSPEED) { 7785 mode = 0; 7786 } else if (status & TP_EC_FAN_AUTO) { 7787 mode = 2; 7788 } else 7789 mode = 1; 7790 7791 return snprintf(buf, PAGE_SIZE, "%d\n", mode); 7792 } 7793 7794 static ssize_t fan_pwm1_enable_store(struct device *dev, 7795 struct device_attribute *attr, 7796 const char *buf, size_t count) 7797 { 7798 unsigned long t; 7799 int res, level; 7800 7801 if (parse_strtoul(buf, 2, &t)) 7802 return -EINVAL; 7803 7804 tpacpi_disclose_usertask("hwmon pwm1_enable", 7805 "set fan mode to %lu\n", t); 7806 7807 switch (t) { 7808 case 0: 7809 level = TP_EC_FAN_FULLSPEED; 7810 break; 7811 case 1: 7812 level = TPACPI_FAN_LAST_LEVEL; 7813 break; 7814 case 2: 7815 level = TP_EC_FAN_AUTO; 7816 break; 7817 case 3: 7818 /* reserved for software-controlled auto mode */ 7819 return -ENOSYS; 7820 default: 7821 return -EINVAL; 7822 } 7823 7824 res = fan_set_level_safe(level); 7825 if (res == -ENXIO) 7826 return -EINVAL; 7827 else if (res < 0) 7828 return res; 7829 7830 fan_watchdog_reset(); 7831 7832 return count; 7833 } 7834 7835 static struct device_attribute dev_attr_fan_pwm1_enable = 7836 __ATTR(pwm1_enable, S_IWUSR | S_IRUGO, 7837 fan_pwm1_enable_show, fan_pwm1_enable_store); 7838 7839 /* sysfs fan pwm1 ------------------------------------------------------ */ 7840 static ssize_t fan_pwm1_show(struct device *dev, 7841 struct device_attribute *attr, 7842 char *buf) 7843 { 7844 int res; 7845 u8 status; 7846 7847 res = fan_get_status_safe(&status); 7848 if (res) 7849 return res; 7850 7851 if ((status & 7852 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) != 0) 7853 status = fan_control_desired_level; 7854 7855 if (status > 7) 7856 status = 7; 7857 7858 return snprintf(buf, PAGE_SIZE, "%u\n", (status * 255) / 7); 7859 } 7860 7861 static ssize_t fan_pwm1_store(struct device *dev, 7862 struct device_attribute *attr, 7863 const char *buf, size_t count) 7864 { 7865 unsigned long s; 7866 int rc; 7867 u8 status, newlevel; 7868 7869 if (parse_strtoul(buf, 255, &s)) 7870 return -EINVAL; 7871 7872 tpacpi_disclose_usertask("hwmon pwm1", 7873 "set fan speed to %lu\n", s); 7874 7875 /* scale down from 0-255 to 0-7 */ 7876 newlevel = (s >> 5) & 0x07; 7877 7878 if (mutex_lock_killable(&fan_mutex)) 7879 return -ERESTARTSYS; 7880 7881 rc = fan_get_status(&status); 7882 if (!rc && (status & 7883 (TP_EC_FAN_AUTO | TP_EC_FAN_FULLSPEED)) == 0) { 7884 rc = fan_set_level(newlevel); 7885 if (rc == -ENXIO) 7886 rc = -EINVAL; 7887 else if (!rc) { 7888 fan_update_desired_level(newlevel); 7889 fan_watchdog_reset(); 7890 } 7891 } 7892 7893 mutex_unlock(&fan_mutex); 7894 return (rc)? rc : count; 7895 } 7896 7897 static struct device_attribute dev_attr_fan_pwm1 = 7898 __ATTR(pwm1, S_IWUSR | S_IRUGO, 7899 fan_pwm1_show, fan_pwm1_store); 7900 7901 /* sysfs fan fan1_input ------------------------------------------------ */ 7902 static ssize_t fan_fan1_input_show(struct device *dev, 7903 struct device_attribute *attr, 7904 char *buf) 7905 { 7906 int res; 7907 unsigned int speed; 7908 7909 res = fan_get_speed(&speed); 7910 if (res < 0) 7911 return res; 7912 7913 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7914 } 7915 7916 static struct device_attribute dev_attr_fan_fan1_input = 7917 __ATTR(fan1_input, S_IRUGO, 7918 fan_fan1_input_show, NULL); 7919 7920 /* sysfs fan fan2_input ------------------------------------------------ */ 7921 static ssize_t fan_fan2_input_show(struct device *dev, 7922 struct device_attribute *attr, 7923 char *buf) 7924 { 7925 int res; 7926 unsigned int speed; 7927 7928 res = fan2_get_speed(&speed); 7929 if (res < 0) 7930 return res; 7931 7932 return snprintf(buf, PAGE_SIZE, "%u\n", speed); 7933 } 7934 7935 static struct device_attribute dev_attr_fan_fan2_input = 7936 __ATTR(fan2_input, S_IRUGO, 7937 fan_fan2_input_show, NULL); 7938 7939 /* sysfs fan fan_watchdog (hwmon driver) ------------------------------- */ 7940 static ssize_t fan_fan_watchdog_show(struct device_driver *drv, 7941 char *buf) 7942 { 7943 return snprintf(buf, PAGE_SIZE, "%u\n", fan_watchdog_maxinterval); 7944 } 7945 7946 static ssize_t fan_fan_watchdog_store(struct device_driver *drv, 7947 const char *buf, size_t count) 7948 { 7949 unsigned long t; 7950 7951 if (parse_strtoul(buf, 120, &t)) 7952 return -EINVAL; 7953 7954 if (!fan_control_allowed) 7955 return -EPERM; 7956 7957 fan_watchdog_maxinterval = t; 7958 fan_watchdog_reset(); 7959 7960 tpacpi_disclose_usertask("fan_watchdog", "set to %lu\n", t); 7961 7962 return count; 7963 } 7964 7965 static DRIVER_ATTR(fan_watchdog, S_IWUSR | S_IRUGO, 7966 fan_fan_watchdog_show, fan_fan_watchdog_store); 7967 7968 /* --------------------------------------------------------------------- */ 7969 static struct attribute *fan_attributes[] = { 7970 &dev_attr_fan_pwm1_enable.attr, &dev_attr_fan_pwm1.attr, 7971 &dev_attr_fan_fan1_input.attr, 7972 NULL, /* for fan2_input */ 7973 NULL 7974 }; 7975 7976 static const struct attribute_group fan_attr_group = { 7977 .attrs = fan_attributes, 7978 }; 7979 7980 #define TPACPI_FAN_Q1 0x0001 /* Unitialized HFSP */ 7981 #define TPACPI_FAN_2FAN 0x0002 /* EC 0x31 bit 0 selects fan2 */ 7982 7983 #define TPACPI_FAN_QI(__id1, __id2, __quirks) \ 7984 { .vendor = PCI_VENDOR_ID_IBM, \ 7985 .bios = TPACPI_MATCH_ANY, \ 7986 .ec = TPID(__id1, __id2), \ 7987 .quirks = __quirks } 7988 7989 #define TPACPI_FAN_QL(__id1, __id2, __quirks) \ 7990 { .vendor = PCI_VENDOR_ID_LENOVO, \ 7991 .bios = TPACPI_MATCH_ANY, \ 7992 .ec = TPID(__id1, __id2), \ 7993 .quirks = __quirks } 7994 7995 static const struct tpacpi_quirk fan_quirk_table[] __initconst = { 7996 TPACPI_FAN_QI('1', 'Y', TPACPI_FAN_Q1), 7997 TPACPI_FAN_QI('7', '8', TPACPI_FAN_Q1), 7998 TPACPI_FAN_QI('7', '6', TPACPI_FAN_Q1), 7999 TPACPI_FAN_QI('7', '0', TPACPI_FAN_Q1), 8000 TPACPI_FAN_QL('7', 'M', TPACPI_FAN_2FAN), 8001 }; 8002 8003 #undef TPACPI_FAN_QL 8004 #undef TPACPI_FAN_QI 8005 8006 static int __init fan_init(struct ibm_init_struct *iibm) 8007 { 8008 int rc; 8009 unsigned long quirks; 8010 8011 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8012 "initializing fan subdriver\n"); 8013 8014 mutex_init(&fan_mutex); 8015 fan_status_access_mode = TPACPI_FAN_NONE; 8016 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8017 fan_control_commands = 0; 8018 fan_watchdog_maxinterval = 0; 8019 tp_features.fan_ctrl_status_undef = 0; 8020 tp_features.second_fan = 0; 8021 fan_control_desired_level = 7; 8022 8023 if (tpacpi_is_ibm()) { 8024 TPACPI_ACPIHANDLE_INIT(fans); 8025 TPACPI_ACPIHANDLE_INIT(gfan); 8026 TPACPI_ACPIHANDLE_INIT(sfan); 8027 } 8028 8029 quirks = tpacpi_check_quirks(fan_quirk_table, 8030 ARRAY_SIZE(fan_quirk_table)); 8031 8032 if (gfan_handle) { 8033 /* 570, 600e/x, 770e, 770x */ 8034 fan_status_access_mode = TPACPI_FAN_RD_ACPI_GFAN; 8035 } else { 8036 /* all other ThinkPads: note that even old-style 8037 * ThinkPad ECs supports the fan control register */ 8038 if (likely(acpi_ec_read(fan_status_offset, 8039 &fan_control_initial_status))) { 8040 fan_status_access_mode = TPACPI_FAN_RD_TPEC; 8041 if (quirks & TPACPI_FAN_Q1) 8042 fan_quirk1_setup(); 8043 if (quirks & TPACPI_FAN_2FAN) { 8044 tp_features.second_fan = 1; 8045 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8046 "secondary fan support enabled\n"); 8047 } 8048 } else { 8049 printk(TPACPI_ERR 8050 "ThinkPad ACPI EC access misbehaving, " 8051 "fan status and control unavailable\n"); 8052 return 1; 8053 } 8054 } 8055 8056 if (sfan_handle) { 8057 /* 570, 770x-JL */ 8058 fan_control_access_mode = TPACPI_FAN_WR_ACPI_SFAN; 8059 fan_control_commands |= 8060 TPACPI_FAN_CMD_LEVEL | TPACPI_FAN_CMD_ENABLE; 8061 } else { 8062 if (!gfan_handle) { 8063 /* gfan without sfan means no fan control */ 8064 /* all other models implement TP EC 0x2f control */ 8065 8066 if (fans_handle) { 8067 /* X31, X40, X41 */ 8068 fan_control_access_mode = 8069 TPACPI_FAN_WR_ACPI_FANS; 8070 fan_control_commands |= 8071 TPACPI_FAN_CMD_SPEED | 8072 TPACPI_FAN_CMD_LEVEL | 8073 TPACPI_FAN_CMD_ENABLE; 8074 } else { 8075 fan_control_access_mode = TPACPI_FAN_WR_TPEC; 8076 fan_control_commands |= 8077 TPACPI_FAN_CMD_LEVEL | 8078 TPACPI_FAN_CMD_ENABLE; 8079 } 8080 } 8081 } 8082 8083 vdbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8084 "fan is %s, modes %d, %d\n", 8085 str_supported(fan_status_access_mode != TPACPI_FAN_NONE || 8086 fan_control_access_mode != TPACPI_FAN_WR_NONE), 8087 fan_status_access_mode, fan_control_access_mode); 8088 8089 /* fan control master switch */ 8090 if (!fan_control_allowed) { 8091 fan_control_access_mode = TPACPI_FAN_WR_NONE; 8092 fan_control_commands = 0; 8093 dbg_printk(TPACPI_DBG_INIT | TPACPI_DBG_FAN, 8094 "fan control features disabled by parameter\n"); 8095 } 8096 8097 /* update fan_control_desired_level */ 8098 if (fan_status_access_mode != TPACPI_FAN_NONE) 8099 fan_get_status_safe(NULL); 8100 8101 if (fan_status_access_mode != TPACPI_FAN_NONE || 8102 fan_control_access_mode != TPACPI_FAN_WR_NONE) { 8103 if (tp_features.second_fan) { 8104 /* attach second fan tachometer */ 8105 fan_attributes[ARRAY_SIZE(fan_attributes)-2] = 8106 &dev_attr_fan_fan2_input.attr; 8107 } 8108 rc = sysfs_create_group(&tpacpi_sensors_pdev->dev.kobj, 8109 &fan_attr_group); 8110 if (rc < 0) 8111 return rc; 8112 8113 rc = driver_create_file(&tpacpi_hwmon_pdriver.driver, 8114 &driver_attr_fan_watchdog); 8115 if (rc < 0) { 8116 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, 8117 &fan_attr_group); 8118 return rc; 8119 } 8120 return 0; 8121 } else 8122 return 1; 8123 } 8124 8125 static void fan_exit(void) 8126 { 8127 vdbg_printk(TPACPI_DBG_EXIT | TPACPI_DBG_FAN, 8128 "cancelling any pending fan watchdog tasks\n"); 8129 8130 /* FIXME: can we really do this unconditionally? */ 8131 sysfs_remove_group(&tpacpi_sensors_pdev->dev.kobj, &fan_attr_group); 8132 driver_remove_file(&tpacpi_hwmon_pdriver.driver, 8133 &driver_attr_fan_watchdog); 8134 8135 cancel_delayed_work(&fan_watchdog_task); 8136 flush_workqueue(tpacpi_wq); 8137 } 8138 8139 static void fan_suspend(pm_message_t state) 8140 { 8141 int rc; 8142 8143 if (!fan_control_allowed) 8144 return; 8145 8146 /* Store fan status in cache */ 8147 fan_control_resume_level = 0; 8148 rc = fan_get_status_safe(&fan_control_resume_level); 8149 if (rc < 0) 8150 printk(TPACPI_NOTICE 8151 "failed to read fan level for later " 8152 "restore during resume: %d\n", rc); 8153 8154 /* if it is undefined, don't attempt to restore it. 8155 * KEEP THIS LAST */ 8156 if (tp_features.fan_ctrl_status_undef) 8157 fan_control_resume_level = 0; 8158 } 8159 8160 static void fan_resume(void) 8161 { 8162 u8 current_level = 7; 8163 bool do_set = false; 8164 int rc; 8165 8166 /* DSDT *always* updates status on resume */ 8167 tp_features.fan_ctrl_status_undef = 0; 8168 8169 if (!fan_control_allowed || 8170 !fan_control_resume_level || 8171 (fan_get_status_safe(¤t_level) < 0)) 8172 return; 8173 8174 switch (fan_control_access_mode) { 8175 case TPACPI_FAN_WR_ACPI_SFAN: 8176 /* never decrease fan level */ 8177 do_set = (fan_control_resume_level > current_level); 8178 break; 8179 case TPACPI_FAN_WR_ACPI_FANS: 8180 case TPACPI_FAN_WR_TPEC: 8181 /* never decrease fan level, scale is: 8182 * TP_EC_FAN_FULLSPEED > 7 >= TP_EC_FAN_AUTO 8183 * 8184 * We expect the firmware to set either 7 or AUTO, but we 8185 * handle FULLSPEED out of paranoia. 8186 * 8187 * So, we can safely only restore FULLSPEED or 7, anything 8188 * else could slow the fan. Restoring AUTO is useless, at 8189 * best that's exactly what the DSDT already set (it is the 8190 * slower it uses). 8191 * 8192 * Always keep in mind that the DSDT *will* have set the 8193 * fans to what the vendor supposes is the best level. We 8194 * muck with it only to speed the fan up. 8195 */ 8196 if (fan_control_resume_level != 7 && 8197 !(fan_control_resume_level & TP_EC_FAN_FULLSPEED)) 8198 return; 8199 else 8200 do_set = !(current_level & TP_EC_FAN_FULLSPEED) && 8201 (current_level != fan_control_resume_level); 8202 break; 8203 default: 8204 return; 8205 } 8206 if (do_set) { 8207 printk(TPACPI_NOTICE 8208 "restoring fan level to 0x%02x\n", 8209 fan_control_resume_level); 8210 rc = fan_set_level_safe(fan_control_resume_level); 8211 if (rc < 0) 8212 printk(TPACPI_NOTICE 8213 "failed to restore fan level: %d\n", rc); 8214 } 8215 } 8216 8217 static int fan_read(struct seq_file *m) 8218 { 8219 int rc; 8220 u8 status; 8221 unsigned int speed = 0; 8222 8223 switch (fan_status_access_mode) { 8224 case TPACPI_FAN_RD_ACPI_GFAN: 8225 /* 570, 600e/x, 770e, 770x */ 8226 rc = fan_get_status_safe(&status); 8227 if (rc < 0) 8228 return rc; 8229 8230 seq_printf(m, "status:\t\t%s\n" 8231 "level:\t\t%d\n", 8232 (status != 0) ? "enabled" : "disabled", status); 8233 break; 8234 8235 case TPACPI_FAN_RD_TPEC: 8236 /* all except 570, 600e/x, 770e, 770x */ 8237 rc = fan_get_status_safe(&status); 8238 if (rc < 0) 8239 return rc; 8240 8241 seq_printf(m, "status:\t\t%s\n", 8242 (status != 0) ? "enabled" : "disabled"); 8243 8244 rc = fan_get_speed(&speed); 8245 if (rc < 0) 8246 return rc; 8247 8248 seq_printf(m, "speed:\t\t%d\n", speed); 8249 8250 if (status & TP_EC_FAN_FULLSPEED) 8251 /* Disengaged mode takes precedence */ 8252 seq_printf(m, "level:\t\tdisengaged\n"); 8253 else if (status & TP_EC_FAN_AUTO) 8254 seq_printf(m, "level:\t\tauto\n"); 8255 else 8256 seq_printf(m, "level:\t\t%d\n", status); 8257 break; 8258 8259 case TPACPI_FAN_NONE: 8260 default: 8261 seq_printf(m, "status:\t\tnot supported\n"); 8262 } 8263 8264 if (fan_control_commands & TPACPI_FAN_CMD_LEVEL) { 8265 seq_printf(m, "commands:\tlevel <level>"); 8266 8267 switch (fan_control_access_mode) { 8268 case TPACPI_FAN_WR_ACPI_SFAN: 8269 seq_printf(m, " (<level> is 0-7)\n"); 8270 break; 8271 8272 default: 8273 seq_printf(m, " (<level> is 0-7, " 8274 "auto, disengaged, full-speed)\n"); 8275 break; 8276 } 8277 } 8278 8279 if (fan_control_commands & TPACPI_FAN_CMD_ENABLE) 8280 seq_printf(m, "commands:\tenable, disable\n" 8281 "commands:\twatchdog <timeout> (<timeout> " 8282 "is 0 (off), 1-120 (seconds))\n"); 8283 8284 if (fan_control_commands & TPACPI_FAN_CMD_SPEED) 8285 seq_printf(m, "commands:\tspeed <speed>" 8286 " (<speed> is 0-65535)\n"); 8287 8288 return 0; 8289 } 8290 8291 static int fan_write_cmd_level(const char *cmd, int *rc) 8292 { 8293 int level; 8294 8295 if (strlencmp(cmd, "level auto") == 0) 8296 level = TP_EC_FAN_AUTO; 8297 else if ((strlencmp(cmd, "level disengaged") == 0) | 8298 (strlencmp(cmd, "level full-speed") == 0)) 8299 level = TP_EC_FAN_FULLSPEED; 8300 else if (sscanf(cmd, "level %d", &level) != 1) 8301 return 0; 8302 8303 *rc = fan_set_level_safe(level); 8304 if (*rc == -ENXIO) 8305 printk(TPACPI_ERR "level command accepted for unsupported " 8306 "access mode %d", fan_control_access_mode); 8307 else if (!*rc) 8308 tpacpi_disclose_usertask("procfs fan", 8309 "set level to %d\n", level); 8310 8311 return 1; 8312 } 8313 8314 static int fan_write_cmd_enable(const char *cmd, int *rc) 8315 { 8316 if (strlencmp(cmd, "enable") != 0) 8317 return 0; 8318 8319 *rc = fan_set_enable(); 8320 if (*rc == -ENXIO) 8321 printk(TPACPI_ERR "enable command accepted for unsupported " 8322 "access mode %d", fan_control_access_mode); 8323 else if (!*rc) 8324 tpacpi_disclose_usertask("procfs fan", "enable\n"); 8325 8326 return 1; 8327 } 8328 8329 static int fan_write_cmd_disable(const char *cmd, int *rc) 8330 { 8331 if (strlencmp(cmd, "disable") != 0) 8332 return 0; 8333 8334 *rc = fan_set_disable(); 8335 if (*rc == -ENXIO) 8336 printk(TPACPI_ERR "disable command accepted for unsupported " 8337 "access mode %d", fan_control_access_mode); 8338 else if (!*rc) 8339 tpacpi_disclose_usertask("procfs fan", "disable\n"); 8340 8341 return 1; 8342 } 8343 8344 static int fan_write_cmd_speed(const char *cmd, int *rc) 8345 { 8346 int speed; 8347 8348 /* TODO: 8349 * Support speed <low> <medium> <high> ? */ 8350 8351 if (sscanf(cmd, "speed %d", &speed) != 1) 8352 return 0; 8353 8354 *rc = fan_set_speed(speed); 8355 if (*rc == -ENXIO) 8356 printk(TPACPI_ERR "speed command accepted for unsupported " 8357 "access mode %d", fan_control_access_mode); 8358 else if (!*rc) 8359 tpacpi_disclose_usertask("procfs fan", 8360 "set speed to %d\n", speed); 8361 8362 return 1; 8363 } 8364 8365 static int fan_write_cmd_watchdog(const char *cmd, int *rc) 8366 { 8367 int interval; 8368 8369 if (sscanf(cmd, "watchdog %d", &interval) != 1) 8370 return 0; 8371 8372 if (interval < 0 || interval > 120) 8373 *rc = -EINVAL; 8374 else { 8375 fan_watchdog_maxinterval = interval; 8376 tpacpi_disclose_usertask("procfs fan", 8377 "set watchdog timer to %d\n", 8378 interval); 8379 } 8380 8381 return 1; 8382 } 8383 8384 static int fan_write(char *buf) 8385 { 8386 char *cmd; 8387 int rc = 0; 8388 8389 while (!rc && (cmd = next_cmd(&buf))) { 8390 if (!((fan_control_commands & TPACPI_FAN_CMD_LEVEL) && 8391 fan_write_cmd_level(cmd, &rc)) && 8392 !((fan_control_commands & TPACPI_FAN_CMD_ENABLE) && 8393 (fan_write_cmd_enable(cmd, &rc) || 8394 fan_write_cmd_disable(cmd, &rc) || 8395 fan_write_cmd_watchdog(cmd, &rc))) && 8396 !((fan_control_commands & TPACPI_FAN_CMD_SPEED) && 8397 fan_write_cmd_speed(cmd, &rc)) 8398 ) 8399 rc = -EINVAL; 8400 else if (!rc) 8401 fan_watchdog_reset(); 8402 } 8403 8404 return rc; 8405 } 8406 8407 static struct ibm_struct fan_driver_data = { 8408 .name = "fan", 8409 .read = fan_read, 8410 .write = fan_write, 8411 .exit = fan_exit, 8412 .suspend = fan_suspend, 8413 .resume = fan_resume, 8414 }; 8415 8416 /**************************************************************************** 8417 **************************************************************************** 8418 * 8419 * Infrastructure 8420 * 8421 **************************************************************************** 8422 ****************************************************************************/ 8423 8424 /* 8425 * HKEY event callout for other subdrivers go here 8426 * (yes, it is ugly, but it is quick, safe, and gets the job done 8427 */ 8428 static void tpacpi_driver_event(const unsigned int hkey_event) 8429 { 8430 if (ibm_backlight_device) { 8431 switch (hkey_event) { 8432 case TP_HKEY_EV_BRGHT_UP: 8433 case TP_HKEY_EV_BRGHT_DOWN: 8434 tpacpi_brightness_notify_change(); 8435 } 8436 } 8437 if (alsa_card) { 8438 switch (hkey_event) { 8439 case TP_HKEY_EV_VOL_UP: 8440 case TP_HKEY_EV_VOL_DOWN: 8441 case TP_HKEY_EV_VOL_MUTE: 8442 volume_alsa_notify_change(); 8443 } 8444 } 8445 } 8446 8447 static void hotkey_driver_event(const unsigned int scancode) 8448 { 8449 tpacpi_driver_event(TP_HKEY_EV_HOTKEY_BASE + scancode); 8450 } 8451 8452 /* sysfs name ---------------------------------------------------------- */ 8453 static ssize_t thinkpad_acpi_pdev_name_show(struct device *dev, 8454 struct device_attribute *attr, 8455 char *buf) 8456 { 8457 return snprintf(buf, PAGE_SIZE, "%s\n", TPACPI_NAME); 8458 } 8459 8460 static struct device_attribute dev_attr_thinkpad_acpi_pdev_name = 8461 __ATTR(name, S_IRUGO, thinkpad_acpi_pdev_name_show, NULL); 8462 8463 /* --------------------------------------------------------------------- */ 8464 8465 /* /proc support */ 8466 static struct proc_dir_entry *proc_dir; 8467 8468 /* 8469 * Module and infrastructure proble, init and exit handling 8470 */ 8471 8472 static int force_load; 8473 8474 #ifdef CONFIG_THINKPAD_ACPI_DEBUG 8475 static const char * __init str_supported(int is_supported) 8476 { 8477 static char text_unsupported[] __initdata = "not supported"; 8478 8479 return (is_supported)? &text_unsupported[4] : &text_unsupported[0]; 8480 } 8481 #endif /* CONFIG_THINKPAD_ACPI_DEBUG */ 8482 8483 static void ibm_exit(struct ibm_struct *ibm) 8484 { 8485 dbg_printk(TPACPI_DBG_EXIT, "removing %s\n", ibm->name); 8486 8487 list_del_init(&ibm->all_drivers); 8488 8489 if (ibm->flags.acpi_notify_installed) { 8490 dbg_printk(TPACPI_DBG_EXIT, 8491 "%s: acpi_remove_notify_handler\n", ibm->name); 8492 BUG_ON(!ibm->acpi); 8493 acpi_remove_notify_handler(*ibm->acpi->handle, 8494 ibm->acpi->type, 8495 dispatch_acpi_notify); 8496 ibm->flags.acpi_notify_installed = 0; 8497 } 8498 8499 if (ibm->flags.proc_created) { 8500 dbg_printk(TPACPI_DBG_EXIT, 8501 "%s: remove_proc_entry\n", ibm->name); 8502 remove_proc_entry(ibm->name, proc_dir); 8503 ibm->flags.proc_created = 0; 8504 } 8505 8506 if (ibm->flags.acpi_driver_registered) { 8507 dbg_printk(TPACPI_DBG_EXIT, 8508 "%s: acpi_bus_unregister_driver\n", ibm->name); 8509 BUG_ON(!ibm->acpi); 8510 acpi_bus_unregister_driver(ibm->acpi->driver); 8511 kfree(ibm->acpi->driver); 8512 ibm->acpi->driver = NULL; 8513 ibm->flags.acpi_driver_registered = 0; 8514 } 8515 8516 if (ibm->flags.init_called && ibm->exit) { 8517 ibm->exit(); 8518 ibm->flags.init_called = 0; 8519 } 8520 8521 dbg_printk(TPACPI_DBG_INIT, "finished removing %s\n", ibm->name); 8522 } 8523 8524 static int __init ibm_init(struct ibm_init_struct *iibm) 8525 { 8526 int ret; 8527 struct ibm_struct *ibm = iibm->data; 8528 struct proc_dir_entry *entry; 8529 8530 BUG_ON(ibm == NULL); 8531 8532 INIT_LIST_HEAD(&ibm->all_drivers); 8533 8534 if (ibm->flags.experimental && !experimental) 8535 return 0; 8536 8537 dbg_printk(TPACPI_DBG_INIT, 8538 "probing for %s\n", ibm->name); 8539 8540 if (iibm->init) { 8541 ret = iibm->init(iibm); 8542 if (ret > 0) 8543 return 0; /* probe failed */ 8544 if (ret) 8545 return ret; 8546 8547 ibm->flags.init_called = 1; 8548 } 8549 8550 if (ibm->acpi) { 8551 if (ibm->acpi->hid) { 8552 ret = register_tpacpi_subdriver(ibm); 8553 if (ret) 8554 goto err_out; 8555 } 8556 8557 if (ibm->acpi->notify) { 8558 ret = setup_acpi_notify(ibm); 8559 if (ret == -ENODEV) { 8560 printk(TPACPI_NOTICE "disabling subdriver %s\n", 8561 ibm->name); 8562 ret = 0; 8563 goto err_out; 8564 } 8565 if (ret < 0) 8566 goto err_out; 8567 } 8568 } 8569 8570 dbg_printk(TPACPI_DBG_INIT, 8571 "%s installed\n", ibm->name); 8572 8573 if (ibm->read) { 8574 mode_t mode = iibm->base_procfs_mode; 8575 8576 if (!mode) 8577 mode = S_IRUGO; 8578 if (ibm->write) 8579 mode |= S_IWUSR; 8580 entry = proc_create_data(ibm->name, mode, proc_dir, 8581 &dispatch_proc_fops, ibm); 8582 if (!entry) { 8583 printk(TPACPI_ERR "unable to create proc entry %s\n", 8584 ibm->name); 8585 ret = -ENODEV; 8586 goto err_out; 8587 } 8588 ibm->flags.proc_created = 1; 8589 } 8590 8591 list_add_tail(&ibm->all_drivers, &tpacpi_all_drivers); 8592 8593 return 0; 8594 8595 err_out: 8596 dbg_printk(TPACPI_DBG_INIT, 8597 "%s: at error exit path with result %d\n", 8598 ibm->name, ret); 8599 8600 ibm_exit(ibm); 8601 return (ret < 0)? ret : 0; 8602 } 8603 8604 /* Probing */ 8605 8606 static bool __pure __init tpacpi_is_fw_digit(const char c) 8607 { 8608 return (c >= '0' && c <= '9') || (c >= 'A' && c <= 'Z'); 8609 } 8610 8611 /* Most models: xxyTkkWW (#.##c); Ancient 570/600 and -SL lacks (#.##c) */ 8612 static bool __pure __init tpacpi_is_valid_fw_id(const char* const s, 8613 const char t) 8614 { 8615 return s && strlen(s) >= 8 && 8616 tpacpi_is_fw_digit(s[0]) && 8617 tpacpi_is_fw_digit(s[1]) && 8618 s[2] == t && s[3] == 'T' && 8619 tpacpi_is_fw_digit(s[4]) && 8620 tpacpi_is_fw_digit(s[5]) && 8621 s[6] == 'W' && s[7] == 'W'; 8622 } 8623 8624 /* returns 0 - probe ok, or < 0 - probe error. 8625 * Probe ok doesn't mean thinkpad found. 8626 * On error, kfree() cleanup on tp->* is not performed, caller must do it */ 8627 static int __must_check __init get_thinkpad_model_data( 8628 struct thinkpad_id_data *tp) 8629 { 8630 const struct dmi_device *dev = NULL; 8631 char ec_fw_string[18]; 8632 char const *s; 8633 8634 if (!tp) 8635 return -EINVAL; 8636 8637 memset(tp, 0, sizeof(*tp)); 8638 8639 if (dmi_name_in_vendors("IBM")) 8640 tp->vendor = PCI_VENDOR_ID_IBM; 8641 else if (dmi_name_in_vendors("LENOVO")) 8642 tp->vendor = PCI_VENDOR_ID_LENOVO; 8643 else 8644 return 0; 8645 8646 s = dmi_get_system_info(DMI_BIOS_VERSION); 8647 tp->bios_version_str = kstrdup(s, GFP_KERNEL); 8648 if (s && !tp->bios_version_str) 8649 return -ENOMEM; 8650 8651 /* Really ancient ThinkPad 240X will fail this, which is fine */ 8652 if (!tpacpi_is_valid_fw_id(tp->bios_version_str, 'E')) 8653 return 0; 8654 8655 tp->bios_model = tp->bios_version_str[0] 8656 | (tp->bios_version_str[1] << 8); 8657 tp->bios_release = (tp->bios_version_str[4] << 8) 8658 | tp->bios_version_str[5]; 8659 8660 /* 8661 * ThinkPad T23 or newer, A31 or newer, R50e or newer, 8662 * X32 or newer, all Z series; Some models must have an 8663 * up-to-date BIOS or they will not be detected. 8664 * 8665 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 8666 */ 8667 while ((dev = dmi_find_device(DMI_DEV_TYPE_OEM_STRING, NULL, dev))) { 8668 if (sscanf(dev->name, 8669 "IBM ThinkPad Embedded Controller -[%17c", 8670 ec_fw_string) == 1) { 8671 ec_fw_string[sizeof(ec_fw_string) - 1] = 0; 8672 ec_fw_string[strcspn(ec_fw_string, " ]")] = 0; 8673 8674 tp->ec_version_str = kstrdup(ec_fw_string, GFP_KERNEL); 8675 if (!tp->ec_version_str) 8676 return -ENOMEM; 8677 8678 if (tpacpi_is_valid_fw_id(ec_fw_string, 'H')) { 8679 tp->ec_model = ec_fw_string[0] 8680 | (ec_fw_string[1] << 8); 8681 tp->ec_release = (ec_fw_string[4] << 8) 8682 | ec_fw_string[5]; 8683 } else { 8684 printk(TPACPI_NOTICE 8685 "ThinkPad firmware release %s " 8686 "doesn't match the known patterns\n", 8687 ec_fw_string); 8688 printk(TPACPI_NOTICE 8689 "please report this to %s\n", 8690 TPACPI_MAIL); 8691 } 8692 break; 8693 } 8694 } 8695 8696 s = dmi_get_system_info(DMI_PRODUCT_VERSION); 8697 if (s && !strnicmp(s, "ThinkPad", 8)) { 8698 tp->model_str = kstrdup(s, GFP_KERNEL); 8699 if (!tp->model_str) 8700 return -ENOMEM; 8701 } 8702 8703 s = dmi_get_system_info(DMI_PRODUCT_NAME); 8704 tp->nummodel_str = kstrdup(s, GFP_KERNEL); 8705 if (s && !tp->nummodel_str) 8706 return -ENOMEM; 8707 8708 return 0; 8709 } 8710 8711 static int __init probe_for_thinkpad(void) 8712 { 8713 int is_thinkpad; 8714 8715 if (acpi_disabled) 8716 return -ENODEV; 8717 8718 /* It would be dangerous to run the driver in this case */ 8719 if (!tpacpi_is_ibm() && !tpacpi_is_lenovo()) 8720 return -ENODEV; 8721 8722 /* 8723 * Non-ancient models have better DMI tagging, but very old models 8724 * don't. tpacpi_is_fw_known() is a cheat to help in that case. 8725 */ 8726 is_thinkpad = (thinkpad_id.model_str != NULL) || 8727 (thinkpad_id.ec_model != 0) || 8728 tpacpi_is_fw_known(); 8729 8730 /* The EC handler is required */ 8731 tpacpi_acpi_handle_locate("ec", TPACPI_ACPI_EC_HID, &ec_handle); 8732 if (!ec_handle) { 8733 if (is_thinkpad) 8734 printk(TPACPI_ERR 8735 "Not yet supported ThinkPad detected!\n"); 8736 return -ENODEV; 8737 } 8738 8739 if (!is_thinkpad && !force_load) 8740 return -ENODEV; 8741 8742 return 0; 8743 } 8744 8745 static void __init thinkpad_acpi_init_banner(void) 8746 { 8747 printk(TPACPI_INFO "%s v%s\n", TPACPI_DESC, TPACPI_VERSION); 8748 printk(TPACPI_INFO "%s\n", TPACPI_URL); 8749 8750 printk(TPACPI_INFO "ThinkPad BIOS %s, EC %s\n", 8751 (thinkpad_id.bios_version_str) ? 8752 thinkpad_id.bios_version_str : "unknown", 8753 (thinkpad_id.ec_version_str) ? 8754 thinkpad_id.ec_version_str : "unknown"); 8755 8756 BUG_ON(!thinkpad_id.vendor); 8757 8758 if (thinkpad_id.model_str) 8759 printk(TPACPI_INFO "%s %s, model %s\n", 8760 (thinkpad_id.vendor == PCI_VENDOR_ID_IBM) ? 8761 "IBM" : ((thinkpad_id.vendor == 8762 PCI_VENDOR_ID_LENOVO) ? 8763 "Lenovo" : "Unknown vendor"), 8764 thinkpad_id.model_str, 8765 (thinkpad_id.nummodel_str) ? 8766 thinkpad_id.nummodel_str : "unknown"); 8767 } 8768 8769 /* Module init, exit, parameters */ 8770 8771 static struct ibm_init_struct ibms_init[] __initdata = { 8772 { 8773 .data = &thinkpad_acpi_driver_data, 8774 }, 8775 { 8776 .init = hotkey_init, 8777 .data = &hotkey_driver_data, 8778 }, 8779 { 8780 .init = bluetooth_init, 8781 .data = &bluetooth_driver_data, 8782 }, 8783 { 8784 .init = wan_init, 8785 .data = &wan_driver_data, 8786 }, 8787 { 8788 .init = uwb_init, 8789 .data = &uwb_driver_data, 8790 }, 8791 #ifdef CONFIG_THINKPAD_ACPI_VIDEO 8792 { 8793 .init = video_init, 8794 .base_procfs_mode = S_IRUSR, 8795 .data = &video_driver_data, 8796 }, 8797 #endif 8798 { 8799 .init = light_init, 8800 .data = &light_driver_data, 8801 }, 8802 { 8803 .init = cmos_init, 8804 .data = &cmos_driver_data, 8805 }, 8806 { 8807 .init = led_init, 8808 .data = &led_driver_data, 8809 }, 8810 { 8811 .init = beep_init, 8812 .data = &beep_driver_data, 8813 }, 8814 { 8815 .init = thermal_init, 8816 .data = &thermal_driver_data, 8817 }, 8818 { 8819 .init = brightness_init, 8820 .data = &brightness_driver_data, 8821 }, 8822 { 8823 .init = volume_init, 8824 .data = &volume_driver_data, 8825 }, 8826 { 8827 .init = fan_init, 8828 .data = &fan_driver_data, 8829 }, 8830 }; 8831 8832 static int __init set_ibm_param(const char *val, struct kernel_param *kp) 8833 { 8834 unsigned int i; 8835 struct ibm_struct *ibm; 8836 8837 if (!kp || !kp->name || !val) 8838 return -EINVAL; 8839 8840 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 8841 ibm = ibms_init[i].data; 8842 WARN_ON(ibm == NULL); 8843 8844 if (!ibm || !ibm->name) 8845 continue; 8846 8847 if (strcmp(ibm->name, kp->name) == 0 && ibm->write) { 8848 if (strlen(val) > sizeof(ibms_init[i].param) - 2) 8849 return -ENOSPC; 8850 strcpy(ibms_init[i].param, val); 8851 strcat(ibms_init[i].param, ","); 8852 return 0; 8853 } 8854 } 8855 8856 return -EINVAL; 8857 } 8858 8859 module_param(experimental, int, 0444); 8860 MODULE_PARM_DESC(experimental, 8861 "Enables experimental features when non-zero"); 8862 8863 module_param_named(debug, dbg_level, uint, 0); 8864 MODULE_PARM_DESC(debug, "Sets debug level bit-mask"); 8865 8866 module_param(force_load, bool, 0444); 8867 MODULE_PARM_DESC(force_load, 8868 "Attempts to load the driver even on a " 8869 "mis-identified ThinkPad when true"); 8870 8871 module_param_named(fan_control, fan_control_allowed, bool, 0444); 8872 MODULE_PARM_DESC(fan_control, 8873 "Enables setting fan parameters features when true"); 8874 8875 module_param_named(brightness_mode, brightness_mode, uint, 0444); 8876 MODULE_PARM_DESC(brightness_mode, 8877 "Selects brightness control strategy: " 8878 "0=auto, 1=EC, 2=UCMS, 3=EC+NVRAM"); 8879 8880 module_param(brightness_enable, uint, 0444); 8881 MODULE_PARM_DESC(brightness_enable, 8882 "Enables backlight control when 1, disables when 0"); 8883 8884 module_param(hotkey_report_mode, uint, 0444); 8885 MODULE_PARM_DESC(hotkey_report_mode, 8886 "used for backwards compatibility with userspace, " 8887 "see documentation"); 8888 8889 #ifdef CONFIG_THINKPAD_ACPI_ALSA_SUPPORT 8890 module_param_named(volume_mode, volume_mode, uint, 0444); 8891 MODULE_PARM_DESC(volume_mode, 8892 "Selects volume control strategy: " 8893 "0=auto, 1=EC, 2=N/A, 3=EC+NVRAM"); 8894 8895 module_param_named(volume_capabilities, volume_capabilities, uint, 0444); 8896 MODULE_PARM_DESC(volume_capabilities, 8897 "Selects the mixer capabilites: " 8898 "0=auto, 1=volume and mute, 2=mute only"); 8899 8900 module_param_named(volume_control, volume_control_allowed, bool, 0444); 8901 MODULE_PARM_DESC(volume_control, 8902 "Enables software override for the console audio " 8903 "control when true"); 8904 8905 /* ALSA module API parameters */ 8906 module_param_named(index, alsa_index, int, 0444); 8907 MODULE_PARM_DESC(index, "ALSA index for the ACPI EC Mixer"); 8908 module_param_named(id, alsa_id, charp, 0444); 8909 MODULE_PARM_DESC(id, "ALSA id for the ACPI EC Mixer"); 8910 module_param_named(enable, alsa_enable, bool, 0444); 8911 MODULE_PARM_DESC(enable, "Enable the ALSA interface for the ACPI EC Mixer"); 8912 #endif /* CONFIG_THINKPAD_ACPI_ALSA_SUPPORT */ 8913 8914 #define TPACPI_PARAM(feature) \ 8915 module_param_call(feature, set_ibm_param, NULL, NULL, 0); \ 8916 MODULE_PARM_DESC(feature, "Simulates thinkpad-acpi procfs command " \ 8917 "at module load, see documentation") 8918 8919 TPACPI_PARAM(hotkey); 8920 TPACPI_PARAM(bluetooth); 8921 TPACPI_PARAM(video); 8922 TPACPI_PARAM(light); 8923 TPACPI_PARAM(cmos); 8924 TPACPI_PARAM(led); 8925 TPACPI_PARAM(beep); 8926 TPACPI_PARAM(brightness); 8927 TPACPI_PARAM(volume); 8928 TPACPI_PARAM(fan); 8929 8930 #ifdef CONFIG_THINKPAD_ACPI_DEBUGFACILITIES 8931 module_param(dbg_wlswemul, uint, 0444); 8932 MODULE_PARM_DESC(dbg_wlswemul, "Enables WLSW emulation"); 8933 module_param_named(wlsw_state, tpacpi_wlsw_emulstate, bool, 0); 8934 MODULE_PARM_DESC(wlsw_state, 8935 "Initial state of the emulated WLSW switch"); 8936 8937 module_param(dbg_bluetoothemul, uint, 0444); 8938 MODULE_PARM_DESC(dbg_bluetoothemul, "Enables bluetooth switch emulation"); 8939 module_param_named(bluetooth_state, tpacpi_bluetooth_emulstate, bool, 0); 8940 MODULE_PARM_DESC(bluetooth_state, 8941 "Initial state of the emulated bluetooth switch"); 8942 8943 module_param(dbg_wwanemul, uint, 0444); 8944 MODULE_PARM_DESC(dbg_wwanemul, "Enables WWAN switch emulation"); 8945 module_param_named(wwan_state, tpacpi_wwan_emulstate, bool, 0); 8946 MODULE_PARM_DESC(wwan_state, 8947 "Initial state of the emulated WWAN switch"); 8948 8949 module_param(dbg_uwbemul, uint, 0444); 8950 MODULE_PARM_DESC(dbg_uwbemul, "Enables UWB switch emulation"); 8951 module_param_named(uwb_state, tpacpi_uwb_emulstate, bool, 0); 8952 MODULE_PARM_DESC(uwb_state, 8953 "Initial state of the emulated UWB switch"); 8954 #endif 8955 8956 static void thinkpad_acpi_module_exit(void) 8957 { 8958 struct ibm_struct *ibm, *itmp; 8959 8960 tpacpi_lifecycle = TPACPI_LIFE_EXITING; 8961 8962 list_for_each_entry_safe_reverse(ibm, itmp, 8963 &tpacpi_all_drivers, 8964 all_drivers) { 8965 ibm_exit(ibm); 8966 } 8967 8968 dbg_printk(TPACPI_DBG_INIT, "finished subdriver exit path...\n"); 8969 8970 if (tpacpi_inputdev) { 8971 if (tp_features.input_device_registered) 8972 input_unregister_device(tpacpi_inputdev); 8973 else 8974 input_free_device(tpacpi_inputdev); 8975 } 8976 8977 if (tpacpi_hwmon) 8978 hwmon_device_unregister(tpacpi_hwmon); 8979 8980 if (tp_features.sensors_pdev_attrs_registered) 8981 device_remove_file(&tpacpi_sensors_pdev->dev, 8982 &dev_attr_thinkpad_acpi_pdev_name); 8983 if (tpacpi_sensors_pdev) 8984 platform_device_unregister(tpacpi_sensors_pdev); 8985 if (tpacpi_pdev) 8986 platform_device_unregister(tpacpi_pdev); 8987 8988 if (tp_features.sensors_pdrv_attrs_registered) 8989 tpacpi_remove_driver_attributes(&tpacpi_hwmon_pdriver.driver); 8990 if (tp_features.platform_drv_attrs_registered) 8991 tpacpi_remove_driver_attributes(&tpacpi_pdriver.driver); 8992 8993 if (tp_features.sensors_pdrv_registered) 8994 platform_driver_unregister(&tpacpi_hwmon_pdriver); 8995 8996 if (tp_features.platform_drv_registered) 8997 platform_driver_unregister(&tpacpi_pdriver); 8998 8999 if (proc_dir) 9000 remove_proc_entry(TPACPI_PROC_DIR, acpi_root_dir); 9001 9002 if (tpacpi_wq) 9003 destroy_workqueue(tpacpi_wq); 9004 9005 kfree(thinkpad_id.bios_version_str); 9006 kfree(thinkpad_id.ec_version_str); 9007 kfree(thinkpad_id.model_str); 9008 } 9009 9010 9011 static int __init thinkpad_acpi_module_init(void) 9012 { 9013 int ret, i; 9014 9015 tpacpi_lifecycle = TPACPI_LIFE_INIT; 9016 9017 /* Parameter checking */ 9018 if (hotkey_report_mode > 2) 9019 return -EINVAL; 9020 9021 /* Driver-level probe */ 9022 9023 ret = get_thinkpad_model_data(&thinkpad_id); 9024 if (ret) { 9025 printk(TPACPI_ERR 9026 "unable to get DMI data: %d\n", ret); 9027 thinkpad_acpi_module_exit(); 9028 return ret; 9029 } 9030 ret = probe_for_thinkpad(); 9031 if (ret) { 9032 thinkpad_acpi_module_exit(); 9033 return ret; 9034 } 9035 9036 /* Driver initialization */ 9037 9038 thinkpad_acpi_init_banner(); 9039 tpacpi_check_outdated_fw(); 9040 9041 TPACPI_ACPIHANDLE_INIT(ecrd); 9042 TPACPI_ACPIHANDLE_INIT(ecwr); 9043 9044 tpacpi_wq = create_singlethread_workqueue(TPACPI_WORKQUEUE_NAME); 9045 if (!tpacpi_wq) { 9046 thinkpad_acpi_module_exit(); 9047 return -ENOMEM; 9048 } 9049 9050 proc_dir = proc_mkdir(TPACPI_PROC_DIR, acpi_root_dir); 9051 if (!proc_dir) { 9052 printk(TPACPI_ERR 9053 "unable to create proc dir " TPACPI_PROC_DIR); 9054 thinkpad_acpi_module_exit(); 9055 return -ENODEV; 9056 } 9057 9058 ret = platform_driver_register(&tpacpi_pdriver); 9059 if (ret) { 9060 printk(TPACPI_ERR 9061 "unable to register main platform driver\n"); 9062 thinkpad_acpi_module_exit(); 9063 return ret; 9064 } 9065 tp_features.platform_drv_registered = 1; 9066 9067 ret = platform_driver_register(&tpacpi_hwmon_pdriver); 9068 if (ret) { 9069 printk(TPACPI_ERR 9070 "unable to register hwmon platform driver\n"); 9071 thinkpad_acpi_module_exit(); 9072 return ret; 9073 } 9074 tp_features.sensors_pdrv_registered = 1; 9075 9076 ret = tpacpi_create_driver_attributes(&tpacpi_pdriver.driver); 9077 if (!ret) { 9078 tp_features.platform_drv_attrs_registered = 1; 9079 ret = tpacpi_create_driver_attributes( 9080 &tpacpi_hwmon_pdriver.driver); 9081 } 9082 if (ret) { 9083 printk(TPACPI_ERR 9084 "unable to create sysfs driver attributes\n"); 9085 thinkpad_acpi_module_exit(); 9086 return ret; 9087 } 9088 tp_features.sensors_pdrv_attrs_registered = 1; 9089 9090 9091 /* Device initialization */ 9092 tpacpi_pdev = platform_device_register_simple(TPACPI_DRVR_NAME, -1, 9093 NULL, 0); 9094 if (IS_ERR(tpacpi_pdev)) { 9095 ret = PTR_ERR(tpacpi_pdev); 9096 tpacpi_pdev = NULL; 9097 printk(TPACPI_ERR "unable to register platform device\n"); 9098 thinkpad_acpi_module_exit(); 9099 return ret; 9100 } 9101 tpacpi_sensors_pdev = platform_device_register_simple( 9102 TPACPI_HWMON_DRVR_NAME, 9103 -1, NULL, 0); 9104 if (IS_ERR(tpacpi_sensors_pdev)) { 9105 ret = PTR_ERR(tpacpi_sensors_pdev); 9106 tpacpi_sensors_pdev = NULL; 9107 printk(TPACPI_ERR 9108 "unable to register hwmon platform device\n"); 9109 thinkpad_acpi_module_exit(); 9110 return ret; 9111 } 9112 ret = device_create_file(&tpacpi_sensors_pdev->dev, 9113 &dev_attr_thinkpad_acpi_pdev_name); 9114 if (ret) { 9115 printk(TPACPI_ERR 9116 "unable to create sysfs hwmon device attributes\n"); 9117 thinkpad_acpi_module_exit(); 9118 return ret; 9119 } 9120 tp_features.sensors_pdev_attrs_registered = 1; 9121 tpacpi_hwmon = hwmon_device_register(&tpacpi_sensors_pdev->dev); 9122 if (IS_ERR(tpacpi_hwmon)) { 9123 ret = PTR_ERR(tpacpi_hwmon); 9124 tpacpi_hwmon = NULL; 9125 printk(TPACPI_ERR "unable to register hwmon device\n"); 9126 thinkpad_acpi_module_exit(); 9127 return ret; 9128 } 9129 mutex_init(&tpacpi_inputdev_send_mutex); 9130 tpacpi_inputdev = input_allocate_device(); 9131 if (!tpacpi_inputdev) { 9132 printk(TPACPI_ERR "unable to allocate input device\n"); 9133 thinkpad_acpi_module_exit(); 9134 return -ENOMEM; 9135 } else { 9136 /* Prepare input device, but don't register */ 9137 tpacpi_inputdev->name = "ThinkPad Extra Buttons"; 9138 tpacpi_inputdev->phys = TPACPI_DRVR_NAME "/input0"; 9139 tpacpi_inputdev->id.bustype = BUS_HOST; 9140 tpacpi_inputdev->id.vendor = thinkpad_id.vendor; 9141 tpacpi_inputdev->id.product = TPACPI_HKEY_INPUT_PRODUCT; 9142 tpacpi_inputdev->id.version = TPACPI_HKEY_INPUT_VERSION; 9143 tpacpi_inputdev->dev.parent = &tpacpi_pdev->dev; 9144 } 9145 9146 /* Init subdriver dependencies */ 9147 tpacpi_detect_brightness_capabilities(); 9148 9149 /* Init subdrivers */ 9150 for (i = 0; i < ARRAY_SIZE(ibms_init); i++) { 9151 ret = ibm_init(&ibms_init[i]); 9152 if (ret >= 0 && *ibms_init[i].param) 9153 ret = ibms_init[i].data->write(ibms_init[i].param); 9154 if (ret < 0) { 9155 thinkpad_acpi_module_exit(); 9156 return ret; 9157 } 9158 } 9159 9160 tpacpi_lifecycle = TPACPI_LIFE_RUNNING; 9161 9162 ret = input_register_device(tpacpi_inputdev); 9163 if (ret < 0) { 9164 printk(TPACPI_ERR "unable to register input device\n"); 9165 thinkpad_acpi_module_exit(); 9166 return ret; 9167 } else { 9168 tp_features.input_device_registered = 1; 9169 } 9170 9171 return 0; 9172 } 9173 9174 MODULE_ALIAS(TPACPI_DRVR_SHORTNAME); 9175 9176 /* 9177 * This will autoload the driver in almost every ThinkPad 9178 * in widespread use. 9179 * 9180 * Only _VERY_ old models, like the 240, 240x and 570 lack 9181 * the HKEY event interface. 9182 */ 9183 MODULE_DEVICE_TABLE(acpi, ibm_htk_device_ids); 9184 9185 /* 9186 * DMI matching for module autoloading 9187 * 9188 * See http://thinkwiki.org/wiki/List_of_DMI_IDs 9189 * See http://thinkwiki.org/wiki/BIOS_Upgrade_Downloads 9190 * 9191 * Only models listed in thinkwiki will be supported, so add yours 9192 * if it is not there yet. 9193 */ 9194 #define IBM_BIOS_MODULE_ALIAS(__type) \ 9195 MODULE_ALIAS("dmi:bvnIBM:bvr" __type "ET??WW*") 9196 9197 /* Ancient thinkpad BIOSes have to be identified by 9198 * BIOS type or model number, and there are far less 9199 * BIOS types than model numbers... */ 9200 IBM_BIOS_MODULE_ALIAS("I[MU]"); /* 570, 570e */ 9201 9202 MODULE_AUTHOR("Borislav Deianov <borislav@users.sf.net>"); 9203 MODULE_AUTHOR("Henrique de Moraes Holschuh <hmh@hmh.eng.br>"); 9204 MODULE_DESCRIPTION(TPACPI_DESC); 9205 MODULE_VERSION(TPACPI_VERSION); 9206 MODULE_LICENSE("GPL"); 9207 9208 module_init(thinkpad_acpi_module_init); 9209 module_exit(thinkpad_acpi_module_exit); 9210