thinkpad_acpi.c revision 1.21
1 /* $NetBSD: thinkpad_acpi.c,v 1.21 2009/11/29 21:32:50 cegger Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: thinkpad_acpi.c,v 1.21 2009/11/29 21:32:50 cegger Exp $"); 31 32 #include <sys/types.h> 33 #include <sys/param.h> 34 #include <sys/malloc.h> 35 #include <sys/buf.h> 36 #include <sys/callout.h> 37 #include <sys/kernel.h> 38 #include <sys/device.h> 39 #include <sys/pmf.h> 40 #include <sys/queue.h> 41 #include <sys/kmem.h> 42 43 #include <dev/acpi/acpivar.h> 44 #include <dev/acpi/acpi_ecvar.h> 45 46 #if defined(__i386__) || defined(__amd64__) 47 #include <dev/isa/isareg.h> 48 #include <machine/pio.h> 49 #endif 50 51 #define THINKPAD_NTEMPSENSORS 8 52 #define THINKPAD_NFANSENSORS 1 53 #define THINKPAD_NSENSORS (THINKPAD_NTEMPSENSORS + THINKPAD_NFANSENSORS) 54 55 typedef struct thinkpad_softc { 56 device_t sc_dev; 57 device_t sc_ecdev; 58 struct acpi_devnode *sc_node; 59 ACPI_HANDLE sc_cmoshdl; 60 bool sc_cmoshdl_valid; 61 62 #define TP_PSW_SLEEP 0 63 #define TP_PSW_HIBERNATE 1 64 #define TP_PSW_DISPLAY_CYCLE 2 65 #define TP_PSW_LOCK_SCREEN 3 66 #define TP_PSW_BATTERY_INFO 4 67 #define TP_PSW_EJECT_BUTTON 5 68 #define TP_PSW_ZOOM_BUTTON 6 69 #define TP_PSW_VENDOR_BUTTON 7 70 #define TP_PSW_LAST 8 71 struct sysmon_pswitch sc_smpsw[TP_PSW_LAST]; 72 bool sc_smpsw_valid; 73 74 struct sysmon_envsys *sc_sme; 75 envsys_data_t sc_sensor[THINKPAD_NSENSORS]; 76 77 int sc_display_state; 78 } thinkpad_softc_t; 79 80 /* Hotkey events */ 81 #define THINKPAD_NOTIFY_FnF1 0x001 82 #define THINKPAD_NOTIFY_LockScreen 0x002 83 #define THINKPAD_NOTIFY_BatteryInfo 0x003 84 #define THINKPAD_NOTIFY_SleepButton 0x004 85 #define THINKPAD_NOTIFY_WirelessSwitch 0x005 86 #define THINKPAD_NOTIFY_FnF6 0x006 87 #define THINKPAD_NOTIFY_DisplayCycle 0x007 88 #define THINKPAD_NOTIFY_PointerSwitch 0x008 89 #define THINKPAD_NOTIFY_EjectButton 0x009 90 #define THINKPAD_NOTIFY_FnF10 0x00a 91 #define THINKPAD_NOTIFY_FnF11 0x00b 92 #define THINKPAD_NOTIFY_HibernateButton 0x00c 93 #define THINKPAD_NOTIFY_BrightnessUp 0x010 94 #define THINKPAD_NOTIFY_BrightnessDown 0x011 95 #define THINKPAD_NOTIFY_ThinkLight 0x012 96 #define THINKPAD_NOTIFY_Zoom 0x014 97 #define THINKPAD_NOTIFY_ThinkVantage 0x018 98 99 #define THINKPAD_CMOS_BRIGHTNESS_UP 0x04 100 #define THINKPAD_CMOS_BRIGHTNESS_DOWN 0x05 101 102 #define THINKPAD_HKEY_VERSION 0x0100 103 104 #define THINKPAD_DISPLAY_LCD 0x01 105 #define THINKPAD_DISPLAY_CRT 0x02 106 #define THINKPAD_DISPLAY_DVI 0x08 107 #define THINKPAD_DISPLAY_ALL \ 108 (THINKPAD_DISPLAY_LCD | THINKPAD_DISPLAY_CRT | THINKPAD_DISPLAY_DVI) 109 110 static int thinkpad_match(device_t, cfdata_t, void *); 111 static void thinkpad_attach(device_t, device_t, void *); 112 113 static ACPI_STATUS thinkpad_mask_init(thinkpad_softc_t *, uint32_t); 114 static void thinkpad_notify_handler(ACPI_HANDLE, UINT32, void *); 115 static void thinkpad_get_hotkeys(void *); 116 117 static void thinkpad_sensors_init(thinkpad_softc_t *); 118 static void thinkpad_sensors_refresh(struct sysmon_envsys *, envsys_data_t *); 119 static void thinkpad_temp_refresh(struct sysmon_envsys *, envsys_data_t *); 120 static void thinkpad_fan_refresh(struct sysmon_envsys *, envsys_data_t *); 121 122 static void thinkpad_wireless_toggle(thinkpad_softc_t *); 123 124 static bool thinkpad_resume(device_t PMF_FN_PROTO); 125 static void thinkpad_brightness_up(device_t); 126 static void thinkpad_brightness_down(device_t); 127 static uint8_t thinkpad_brightness_read(thinkpad_softc_t *sc); 128 static void thinkpad_cmos(thinkpad_softc_t *, uint8_t); 129 130 CFATTACH_DECL_NEW(thinkpad, sizeof(thinkpad_softc_t), 131 thinkpad_match, thinkpad_attach, NULL, NULL); 132 133 static const char * const thinkpad_ids[] = { 134 "IBM0068", 135 NULL 136 }; 137 138 static int 139 thinkpad_match(device_t parent, cfdata_t match, void *opaque) 140 { 141 struct acpi_attach_args *aa = (struct acpi_attach_args *)opaque; 142 ACPI_INTEGER ver; 143 144 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 145 return 0; 146 147 if (!acpi_match_hid(aa->aa_node->ad_devinfo, thinkpad_ids)) 148 return 0; 149 150 /* We only support hotkey version 0x0100 */ 151 if (ACPI_FAILURE(acpi_eval_integer(aa->aa_node->ad_handle, "MHKV", 152 &ver))) 153 return 0; 154 155 if (ver != THINKPAD_HKEY_VERSION) 156 return 0; 157 158 /* Cool, looks like we're good to go */ 159 return 1; 160 } 161 162 static void 163 thinkpad_attach(device_t parent, device_t self, void *opaque) 164 { 165 thinkpad_softc_t *sc = device_private(self); 166 struct acpi_attach_args *aa = (struct acpi_attach_args *)opaque; 167 struct sysmon_pswitch *psw; 168 device_t curdev; 169 deviter_t di; 170 ACPI_STATUS rv; 171 ACPI_INTEGER val; 172 int i; 173 174 sc->sc_node = aa->aa_node; 175 sc->sc_dev = self; 176 sc->sc_display_state = THINKPAD_DISPLAY_LCD; 177 178 aprint_naive("\n"); 179 aprint_normal("\n"); 180 181 /* T61 uses \UCMS method for issuing CMOS commands */ 182 rv = AcpiGetHandle(NULL, "\\UCMS", &sc->sc_cmoshdl); 183 if (ACPI_FAILURE(rv)) 184 sc->sc_cmoshdl_valid = false; 185 else { 186 aprint_debug_dev(self, "using CMOS at \\UCMS\n"); 187 sc->sc_cmoshdl_valid = true; 188 } 189 190 sc->sc_ecdev = NULL; 191 for (curdev = deviter_first(&di, DEVITER_F_ROOT_FIRST); 192 curdev != NULL; curdev = deviter_next(&di)) 193 if (device_is_a(curdev, "acpiecdt") || 194 device_is_a(curdev, "acpiec")) { 195 sc->sc_ecdev = curdev; 196 break; 197 } 198 deviter_release(&di); 199 200 if (sc->sc_ecdev) 201 aprint_debug_dev(self, "using EC at %s\n", 202 device_xname(sc->sc_ecdev)); 203 204 /* Get the supported event mask */ 205 rv = acpi_eval_integer(sc->sc_node->ad_handle, "MHKA", &val); 206 if (ACPI_FAILURE(rv)) { 207 aprint_error_dev(self, "couldn't evaluate MHKA: %s\n", 208 AcpiFormatException(rv)); 209 goto fail; 210 } 211 212 /* Enable all supported events */ 213 rv = thinkpad_mask_init(sc, val); 214 if (ACPI_FAILURE(rv)) { 215 aprint_error_dev(self, "couldn't set event mask: %s\n", 216 AcpiFormatException(rv)); 217 goto fail; 218 } 219 220 /* Install notify handler for events */ 221 rv = AcpiInstallNotifyHandler(sc->sc_node->ad_handle, 222 ACPI_DEVICE_NOTIFY, thinkpad_notify_handler, sc); 223 if (ACPI_FAILURE(rv)) 224 aprint_error_dev(self, "couldn't install notify handler: %s\n", 225 AcpiFormatException(rv)); 226 227 /* Register power switches with sysmon */ 228 psw = sc->sc_smpsw; 229 sc->sc_smpsw_valid = true; 230 231 psw[TP_PSW_SLEEP].smpsw_name = device_xname(self); 232 psw[TP_PSW_SLEEP].smpsw_type = PSWITCH_TYPE_SLEEP; 233 #if notyet 234 psw[TP_PSW_HIBERNATE].smpsw_name = device_xname(self); 235 mpsw[TP_PSW_HIBERNATE].smpsw_type = PSWITCH_TYPE_HIBERNATE; 236 #endif 237 for (i = TP_PSW_DISPLAY_CYCLE; i < TP_PSW_LAST; i++) 238 sc->sc_smpsw[i].smpsw_type = PSWITCH_TYPE_HOTKEY; 239 psw[TP_PSW_DISPLAY_CYCLE].smpsw_name = PSWITCH_HK_DISPLAY_CYCLE; 240 psw[TP_PSW_LOCK_SCREEN].smpsw_name = PSWITCH_HK_LOCK_SCREEN; 241 psw[TP_PSW_BATTERY_INFO].smpsw_name = PSWITCH_HK_BATTERY_INFO; 242 psw[TP_PSW_EJECT_BUTTON].smpsw_name = PSWITCH_HK_EJECT_BUTTON; 243 psw[TP_PSW_ZOOM_BUTTON].smpsw_name = PSWITCH_HK_ZOOM_BUTTON; 244 psw[TP_PSW_VENDOR_BUTTON].smpsw_name = PSWITCH_HK_VENDOR_BUTTON; 245 246 for (i = 0; i < TP_PSW_LAST; i++) { 247 /* not supported yet */ 248 if (i == TP_PSW_HIBERNATE) 249 continue; 250 if (sysmon_pswitch_register(&sc->sc_smpsw[i]) != 0) { 251 aprint_error_dev(self, 252 "couldn't register with sysmon\n"); 253 sc->sc_smpsw_valid = false; 254 break; 255 } 256 } 257 258 /* Register temperature and fan sensors with envsys */ 259 thinkpad_sensors_init(sc); 260 261 fail: 262 if (!pmf_device_register(self, NULL, thinkpad_resume)) 263 aprint_error_dev(self, "couldn't establish power handler\n"); 264 if (!pmf_event_register(self, PMFE_DISPLAY_BRIGHTNESS_UP, 265 thinkpad_brightness_up, true)) 266 aprint_error_dev(self, "couldn't register event handler\n"); 267 if (!pmf_event_register(self, PMFE_DISPLAY_BRIGHTNESS_DOWN, 268 thinkpad_brightness_down, true)) 269 aprint_error_dev(self, "couldn't register event handler\n"); 270 } 271 272 static void 273 thinkpad_notify_handler(ACPI_HANDLE hdl, UINT32 notify, void *opaque) 274 { 275 thinkpad_softc_t *sc = (thinkpad_softc_t *)opaque; 276 device_t self = sc->sc_dev; 277 ACPI_STATUS rv; 278 279 if (notify != 0x80) { 280 aprint_debug_dev(self, "unknown notify 0x%02x\n", notify); 281 return; 282 } 283 284 rv = AcpiOsExecute(OSL_NOTIFY_HANDLER, thinkpad_get_hotkeys, sc); 285 if (ACPI_FAILURE(rv)) 286 aprint_error_dev(self, "couldn't queue hotkey handler: %s\n", 287 AcpiFormatException(rv)); 288 } 289 290 static void 291 thinkpad_get_hotkeys(void *opaque) 292 { 293 thinkpad_softc_t *sc = (thinkpad_softc_t *)opaque; 294 device_t self = sc->sc_dev; 295 ACPI_STATUS rv; 296 ACPI_INTEGER val; 297 int type, event; 298 299 for (;;) { 300 rv = acpi_eval_integer(sc->sc_node->ad_handle, "MHKP", &val); 301 if (ACPI_FAILURE(rv)) { 302 aprint_error_dev(self, "couldn't evaluate MHKP: %s\n", 303 AcpiFormatException(rv)); 304 return; 305 } 306 307 if (val == 0) 308 return; 309 310 type = (val & 0xf000) >> 12; 311 event = val & 0x0fff; 312 313 if (type != 1) 314 /* Only type 1 events are supported for now */ 315 continue; 316 317 switch (event) { 318 case THINKPAD_NOTIFY_BrightnessUp: 319 thinkpad_brightness_up(self); 320 break; 321 case THINKPAD_NOTIFY_BrightnessDown: 322 thinkpad_brightness_down(self); 323 break; 324 case THINKPAD_NOTIFY_WirelessSwitch: 325 thinkpad_wireless_toggle(sc); 326 break; 327 case THINKPAD_NOTIFY_SleepButton: 328 if (sc->sc_smpsw_valid == false) 329 break; 330 sysmon_pswitch_event(&sc->sc_smpsw[TP_PSW_SLEEP], 331 PSWITCH_EVENT_PRESSED); 332 break; 333 case THINKPAD_NOTIFY_HibernateButton: 334 #if notyet 335 if (sc->sc_smpsw_valid == false) 336 break; 337 sysmon_pswitch_event(&sc->sc_smpsw[TP_PSW_HIBERNATE], 338 PSWITCH_EVENT_PRESSED); 339 #endif 340 break; 341 case THINKPAD_NOTIFY_DisplayCycle: 342 if (sc->sc_smpsw_valid == false) 343 break; 344 sysmon_pswitch_event( 345 &sc->sc_smpsw[TP_PSW_DISPLAY_CYCLE], 346 PSWITCH_EVENT_PRESSED); 347 break; 348 case THINKPAD_NOTIFY_LockScreen: 349 if (sc->sc_smpsw_valid == false) 350 break; 351 sysmon_pswitch_event( 352 &sc->sc_smpsw[TP_PSW_LOCK_SCREEN], 353 PSWITCH_EVENT_PRESSED); 354 break; 355 case THINKPAD_NOTIFY_BatteryInfo: 356 if (sc->sc_smpsw_valid == false) 357 break; 358 sysmon_pswitch_event( 359 &sc->sc_smpsw[TP_PSW_BATTERY_INFO], 360 PSWITCH_EVENT_PRESSED); 361 break; 362 case THINKPAD_NOTIFY_EjectButton: 363 if (sc->sc_smpsw_valid == false) 364 break; 365 sysmon_pswitch_event( 366 &sc->sc_smpsw[TP_PSW_EJECT_BUTTON], 367 PSWITCH_EVENT_PRESSED); 368 break; 369 case THINKPAD_NOTIFY_Zoom: 370 if (sc->sc_smpsw_valid == false) 371 break; 372 sysmon_pswitch_event( 373 &sc->sc_smpsw[TP_PSW_ZOOM_BUTTON], 374 PSWITCH_EVENT_PRESSED); 375 break; 376 case THINKPAD_NOTIFY_ThinkVantage: 377 if (sc->sc_smpsw_valid == false) 378 break; 379 sysmon_pswitch_event( 380 &sc->sc_smpsw[TP_PSW_VENDOR_BUTTON], 381 PSWITCH_EVENT_PRESSED); 382 break; 383 case THINKPAD_NOTIFY_FnF1: 384 case THINKPAD_NOTIFY_FnF6: 385 case THINKPAD_NOTIFY_PointerSwitch: 386 case THINKPAD_NOTIFY_FnF10: 387 case THINKPAD_NOTIFY_FnF11: 388 case THINKPAD_NOTIFY_ThinkLight: 389 /* XXXJDM we should deliver hotkeys as keycodes */ 390 break; 391 default: 392 aprint_debug_dev(self, "notify event 0x%03x\n", event); 393 break; 394 } 395 } 396 } 397 398 static ACPI_STATUS 399 thinkpad_mask_init(thinkpad_softc_t *sc, uint32_t mask) 400 { 401 ACPI_OBJECT param[2]; 402 ACPI_OBJECT_LIST params; 403 ACPI_STATUS rv; 404 int i; 405 406 /* Update hotkey mask */ 407 params.Count = 2; 408 params.Pointer = param; 409 param[0].Type = param[1].Type = ACPI_TYPE_INTEGER; 410 411 for (i = 0; i < 32; i++) { 412 param[0].Integer.Value = i + 1; 413 param[1].Integer.Value = (((1 << i) & mask) != 0); 414 415 rv = AcpiEvaluateObject(sc->sc_node->ad_handle, "MHKM", 416 ¶ms, NULL); 417 if (ACPI_FAILURE(rv)) 418 return rv; 419 } 420 421 /* Enable hotkey events */ 422 rv = acpi_eval_set_integer(sc->sc_node->ad_handle, "MHKC", 1); 423 if (ACPI_FAILURE(rv)) { 424 aprint_error_dev(sc->sc_dev, "couldn't enable hotkeys: %s\n", 425 AcpiFormatException(rv)); 426 return rv; 427 } 428 429 /* Claim ownership of brightness control */ 430 (void)acpi_eval_set_integer(sc->sc_node->ad_handle, "PWMS", 0); 431 432 return AE_OK; 433 } 434 435 static void 436 thinkpad_sensors_init(thinkpad_softc_t *sc) 437 { 438 char sname[5] = "TMP?"; 439 char fname[5] = "FAN?"; 440 int i, j, err; 441 442 if (sc->sc_ecdev == NULL) 443 return; /* no chance of this working */ 444 445 sc->sc_sme = sysmon_envsys_create(); 446 for (i = 0; i < THINKPAD_NTEMPSENSORS; i++) { 447 sname[3] = '0' + i; 448 strcpy(sc->sc_sensor[i].desc, sname); 449 sc->sc_sensor[i].units = ENVSYS_STEMP; 450 451 if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor[i])) 452 aprint_error_dev(sc->sc_dev, 453 "couldn't attach sensor %s\n", sname); 454 } 455 j = i; /* THINKPAD_NTEMPSENSORS */ 456 for (; i < (j + THINKPAD_NFANSENSORS); i++) { 457 fname[3] = '0' + (i - j); 458 strcpy(sc->sc_sensor[i].desc, fname); 459 sc->sc_sensor[i].units = ENVSYS_SFANRPM; 460 461 if (sysmon_envsys_sensor_attach(sc->sc_sme, &sc->sc_sensor[i])) 462 aprint_error_dev(sc->sc_dev, 463 "couldn't attach sensor %s\n", fname); 464 } 465 466 sc->sc_sme->sme_name = device_xname(sc->sc_dev); 467 sc->sc_sme->sme_cookie = sc; 468 sc->sc_sme->sme_refresh = thinkpad_sensors_refresh; 469 470 err = sysmon_envsys_register(sc->sc_sme); 471 if (err) { 472 aprint_error_dev(sc->sc_dev, 473 "couldn't register with sysmon: %d\n", err); 474 sysmon_envsys_destroy(sc->sc_sme); 475 } 476 } 477 478 static void 479 thinkpad_sensors_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 480 { 481 switch (edata->units) { 482 case ENVSYS_STEMP: 483 thinkpad_temp_refresh(sme, edata); 484 break; 485 case ENVSYS_SFANRPM: 486 thinkpad_fan_refresh(sme, edata); 487 break; 488 default: 489 break; 490 } 491 } 492 493 static void 494 thinkpad_temp_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 495 { 496 thinkpad_softc_t *sc = sme->sme_cookie; 497 char sname[5] = "TMP?"; 498 ACPI_INTEGER val; 499 ACPI_STATUS rv; 500 int temp; 501 502 sname[3] = '0' + edata->sensor; 503 rv = acpi_eval_integer(acpiec_get_handle(sc->sc_ecdev), sname, &val); 504 if (ACPI_FAILURE(rv)) { 505 edata->state = ENVSYS_SINVALID; 506 return; 507 } 508 temp = (int)val; 509 if (temp > 127 || temp < -127) { 510 edata->state = ENVSYS_SINVALID; 511 return; 512 } 513 514 edata->value_cur = temp * 1000000 + 273150000; 515 edata->state = ENVSYS_SVALID; 516 } 517 518 static void 519 thinkpad_fan_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 520 { 521 thinkpad_softc_t *sc = sme->sme_cookie; 522 ACPI_INTEGER lo; 523 ACPI_INTEGER hi; 524 ACPI_STATUS rv; 525 int rpm; 526 527 /* 528 * Read the low byte first to avoid a firmware bug. 529 */ 530 rv = acpiec_bus_read(sc->sc_ecdev, 0x84, &lo, 1); 531 if (ACPI_FAILURE(rv)) { 532 edata->state = ENVSYS_SINVALID; 533 return; 534 } 535 rv = acpiec_bus_read(sc->sc_ecdev, 0x85, &hi, 1); 536 if (ACPI_FAILURE(rv)) { 537 edata->state = ENVSYS_SINVALID; 538 return; 539 } 540 rpm = ((((int)hi) << 8) | ((int)lo)); 541 if (rpm < 0) { 542 edata->state = ENVSYS_SINVALID; 543 return; 544 } 545 546 edata->value_cur = rpm; 547 if (rpm < edata->value_min || edata->value_min == -1) 548 edata->value_min = rpm; 549 if (rpm > edata->value_max || edata->value_max == -1) 550 edata->value_max = rpm; 551 edata->state = ENVSYS_SVALID; 552 } 553 554 static void 555 thinkpad_wireless_toggle(thinkpad_softc_t *sc) 556 { 557 /* Ignore return value, as the hardware may not support bluetooth */ 558 (void)AcpiEvaluateObject(sc->sc_node->ad_handle, "BTGL", NULL, NULL); 559 } 560 561 static uint8_t 562 thinkpad_brightness_read(thinkpad_softc_t *sc) 563 { 564 #if defined(__i386__) || defined(__amd64__) 565 /* 566 * We have two ways to get the current brightness -- either via 567 * magic RTC registers, or using the EC. Since I don't dare mess 568 * with the EC, and Thinkpads are x86-only, this will have to do 569 * for now. 570 */ 571 outb(IO_RTC, 0x6c); 572 return inb(IO_RTC+1) & 7; 573 #else 574 return 0; 575 #endif 576 } 577 578 static void 579 thinkpad_brightness_up(device_t self) 580 { 581 thinkpad_softc_t *sc = device_private(self); 582 583 if (thinkpad_brightness_read(sc) == 7) 584 return; 585 thinkpad_cmos(sc, THINKPAD_CMOS_BRIGHTNESS_UP); 586 } 587 588 static void 589 thinkpad_brightness_down(device_t self) 590 { 591 thinkpad_softc_t *sc = device_private(self); 592 593 if (thinkpad_brightness_read(sc) == 0) 594 return; 595 thinkpad_cmos(sc, THINKPAD_CMOS_BRIGHTNESS_DOWN); 596 } 597 598 static void 599 thinkpad_cmos(thinkpad_softc_t *sc, uint8_t cmd) 600 { 601 ACPI_STATUS rv; 602 603 if (sc->sc_cmoshdl_valid == false) 604 return; 605 606 rv = acpi_eval_set_integer(sc->sc_cmoshdl, NULL, cmd); 607 if (ACPI_FAILURE(rv)) 608 aprint_error_dev(sc->sc_dev, "couldn't evalute CMOS: %s\n", 609 AcpiFormatException(rv)); 610 } 611 612 static bool 613 thinkpad_resume(device_t dv PMF_FN_ARGS) 614 { 615 ACPI_STATUS rv; 616 ACPI_HANDLE pubs; 617 618 rv = AcpiGetHandle(NULL, "\\_SB.PCI0.LPC.EC.PUBS", &pubs); 619 if (ACPI_FAILURE(rv)) 620 return true; /* not fatal */ 621 622 rv = AcpiEvaluateObject(pubs, "_ON", NULL, NULL); 623 if (ACPI_FAILURE(rv)) 624 aprint_error_dev(dv, "failed to execute PUBS._ON: %s\n", 625 AcpiFormatException(rv)); 626 627 return true; 628 } 629
Indexes created Wed Oct 01 19:09:53 GMT 2025