Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/i386/acpica/acpi_machdep.c
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1 /*- 2 * Copyright (c) 2001 Mitsuru IWASAKI 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/bus.h> 32 #include <sys/condvar.h> 33 #include <sys/conf.h> 34 #include <sys/fcntl.h> 35 #include <sys/kernel.h> 36 #include <sys/malloc.h> 37 #include <sys/poll.h> 38 #include <sys/sysctl.h> 39 #include <sys/uio.h> 40 #include <vm/vm.h> 41 #include <vm/pmap.h> 42 43 #include <contrib/dev/acpica/acpi.h> 44 #include <dev/acpica/acpivar.h> 45 #include <dev/acpica/acpiio.h> 46 47 /* 48 * APM driver emulation 49 */ 50 51 #include <machine/apm_bios.h> 52 #include <machine/pc/bios.h> 53 54 #include <i386/bios/apm.h> 55 56 SYSCTL_DECL(_debug_acpi); 57 58 uint32_t acpi_resume_beep; 59 TUNABLE_INT("debug.acpi.resume_beep", &acpi_resume_beep); 60 SYSCTL_UINT(_debug_acpi, OID_AUTO, resume_beep, CTLFLAG_RW, &acpi_resume_beep, 61 0, "Beep the PC speaker when resuming"); 62 uint32_t acpi_reset_video; 63 TUNABLE_INT("hw.acpi.reset_video", &acpi_reset_video); 64 65 static int intr_model = ACPI_INTR_PIC; 66 static int apm_active; 67 static struct clonedevs *apm_clones; 68 69 MALLOC_DEFINE(M_APMDEV, "apmdev", "APM device emulation"); 70 71 static d_open_t apmopen; 72 static d_close_t apmclose; 73 static d_write_t apmwrite; 74 static d_ioctl_t apmioctl; 75 static d_poll_t apmpoll; 76 static d_kqfilter_t apmkqfilter; 77 static void apmreadfiltdetach(struct knote *kn); 78 static int apmreadfilt(struct knote *kn, long hint); 79 static struct filterops apm_readfiltops = 80 { 1, NULL, apmreadfiltdetach, apmreadfilt }; 81 82 static struct cdevsw apm_cdevsw = { 83 .d_version = D_VERSION, 84 .d_flags = D_TRACKCLOSE, 85 .d_open = apmopen, 86 .d_close = apmclose, 87 .d_write = apmwrite, 88 .d_ioctl = apmioctl, 89 .d_poll = apmpoll, 90 .d_name = "apm", 91 .d_kqfilter = apmkqfilter 92 }; 93 94 static int 95 acpi_capm_convert_battstate(struct acpi_battinfo *battp) 96 { 97 int state; 98 99 state = APM_UNKNOWN; 100 101 if (battp->state & ACPI_BATT_STAT_DISCHARG) { 102 if (battp->cap >= 50) 103 state = 0; /* high */ 104 else 105 state = 1; /* low */ 106 } 107 if (battp->state & ACPI_BATT_STAT_CRITICAL) 108 state = 2; /* critical */ 109 if (battp->state & ACPI_BATT_STAT_CHARGING) 110 state = 3; /* charging */ 111 112 /* If still unknown, determine it based on the battery capacity. */ 113 if (state == APM_UNKNOWN) { 114 if (battp->cap >= 50) 115 state = 0; /* high */ 116 else 117 state = 1; /* low */ 118 } 119 120 return (state); 121 } 122 123 static int 124 acpi_capm_convert_battflags(struct acpi_battinfo *battp) 125 { 126 int flags; 127 128 flags = 0; 129 130 if (battp->cap >= 50) 131 flags |= APM_BATT_HIGH; 132 else { 133 if (battp->state & ACPI_BATT_STAT_CRITICAL) 134 flags |= APM_BATT_CRITICAL; 135 else 136 flags |= APM_BATT_LOW; 137 } 138 if (battp->state & ACPI_BATT_STAT_CHARGING) 139 flags |= APM_BATT_CHARGING; 140 if (battp->state == ACPI_BATT_STAT_NOT_PRESENT) 141 flags = APM_BATT_NOT_PRESENT; 142 143 return (flags); 144 } 145 146 static int 147 acpi_capm_get_info(apm_info_t aip) 148 { 149 int acline; 150 struct acpi_battinfo batt; 151 152 aip->ai_infoversion = 1; 153 aip->ai_major = 1; 154 aip->ai_minor = 2; 155 aip->ai_status = apm_active; 156 aip->ai_capabilities= 0xff00; /* unknown */ 157 158 if (acpi_acad_get_acline(&acline)) 159 aip->ai_acline = APM_UNKNOWN; /* unknown */ 160 else 161 aip->ai_acline = acline; /* on/off */ 162 163 if (acpi_battery_get_battinfo(NULL, &batt) != 0) { 164 aip->ai_batt_stat = APM_UNKNOWN; 165 aip->ai_batt_life = APM_UNKNOWN; 166 aip->ai_batt_time = -1; /* unknown */ 167 aip->ai_batteries = ~0U; /* unknown */ 168 } else { 169 aip->ai_batt_stat = acpi_capm_convert_battstate(&batt); 170 aip->ai_batt_life = batt.cap; 171 aip->ai_batt_time = (batt.min == -1) ? -1 : batt.min * 60; 172 aip->ai_batteries = acpi_battery_get_units(); 173 } 174 175 return (0); 176 } 177 178 static int 179 acpi_capm_get_pwstatus(apm_pwstatus_t app) 180 { 181 device_t dev; 182 int acline, unit, error; 183 struct acpi_battinfo batt; 184 185 if (app->ap_device != PMDV_ALLDEV && 186 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL)) 187 return (1); 188 189 if (app->ap_device == PMDV_ALLDEV) 190 error = acpi_battery_get_battinfo(NULL, &batt); 191 else { 192 unit = app->ap_device - PMDV_BATT0; 193 dev = devclass_get_device(devclass_find("battery"), unit); 194 if (dev != NULL) 195 error = acpi_battery_get_battinfo(dev, &batt); 196 else 197 error = ENXIO; 198 } 199 if (error) 200 return (1); 201 202 app->ap_batt_stat = acpi_capm_convert_battstate(&batt); 203 app->ap_batt_flag = acpi_capm_convert_battflags(&batt); 204 app->ap_batt_life = batt.cap; 205 app->ap_batt_time = (batt.min == -1) ? -1 : batt.min * 60; 206 207 if (acpi_acad_get_acline(&acline)) 208 app->ap_acline = APM_UNKNOWN; 209 else 210 app->ap_acline = acline; /* on/off */ 211 212 return (0); 213 } 214 215 /* Create single-use devices for /dev/apm and /dev/apmctl. */ 216 static void 217 apm_clone(void *arg, struct ucred *cred, char *name, int namelen, 218 struct cdev **dev) 219 { 220 int ctl_dev, unit; 221 222 if (*dev != NULL) 223 return; 224 if (strcmp(name, "apmctl") == 0) 225 ctl_dev = TRUE; 226 else if (strcmp(name, "apm") == 0) 227 ctl_dev = FALSE; 228 else 229 return; 230 231 /* Always create a new device and unit number. */ 232 unit = -1; 233 if (clone_create(&apm_clones, &apm_cdevsw, &unit, dev, 0)) { 234 if (ctl_dev) { 235 *dev = make_dev(&apm_cdevsw, unit2minor(unit), 236 UID_ROOT, GID_OPERATOR, 0660, "apmctl%d", unit); 237 } else { 238 *dev = make_dev(&apm_cdevsw, unit2minor(unit), 239 UID_ROOT, GID_OPERATOR, 0664, "apm%d", unit); 240 } 241 if (*dev != NULL) { 242 dev_ref(*dev); 243 (*dev)->si_flags |= SI_CHEAPCLONE; 244 } 245 } 246 } 247 248 /* Create a struct for tracking per-device suspend notification. */ 249 static struct apm_clone_data * 250 apm_create_clone(struct cdev *dev, struct acpi_softc *acpi_sc) 251 { 252 struct apm_clone_data *clone; 253 254 clone = malloc(sizeof(*clone), M_APMDEV, M_WAITOK); 255 clone->cdev = dev; 256 clone->acpi_sc = acpi_sc; 257 clone->notify_status = APM_EV_NONE; 258 bzero(&clone->sel_read, sizeof(clone->sel_read)); 259 knlist_init(&clone->sel_read.si_note, &acpi_mutex, NULL, NULL, NULL); 260 261 /* 262 * The acpi device is always managed by devd(8) and is considered 263 * writable (i.e., ack is required to allow suspend to proceed.) 264 */ 265 if (strcmp("acpi", devtoname(dev)) == 0) 266 clone->flags = ACPI_EVF_DEVD | ACPI_EVF_WRITE; 267 else 268 clone->flags = ACPI_EVF_NONE; 269 270 ACPI_LOCK(acpi); 271 STAILQ_INSERT_TAIL(&acpi_sc->apm_cdevs, clone, entries); 272 ACPI_UNLOCK(acpi); 273 return (clone); 274 } 275 276 static int 277 apmopen(struct cdev *dev, int flag, int fmt, d_thread_t *td) 278 { 279 struct acpi_softc *acpi_sc; 280 struct apm_clone_data *clone; 281 282 acpi_sc = devclass_get_softc(devclass_find("acpi"), 0); 283 clone = apm_create_clone(dev, acpi_sc); 284 dev->si_drv1 = clone; 285 286 /* If the device is opened for write, record that. */ 287 if ((flag & FWRITE) != 0) 288 clone->flags |= ACPI_EVF_WRITE; 289 290 return (0); 291 } 292 293 static int 294 apmclose(struct cdev *dev, int flag, int fmt, d_thread_t *td) 295 { 296 struct apm_clone_data *clone; 297 struct acpi_softc *acpi_sc; 298 299 clone = dev->si_drv1; 300 acpi_sc = clone->acpi_sc; 301 302 /* We are about to lose a reference so check if suspend should occur */ 303 if (acpi_sc->acpi_next_sstate != 0 && 304 clone->notify_status != APM_EV_ACKED) 305 acpi_AckSleepState(clone, 0); 306 307 /* Remove this clone's data from the list and free it. */ 308 ACPI_LOCK(acpi); 309 STAILQ_REMOVE(&acpi_sc->apm_cdevs, clone, apm_clone_data, entries); 310 knlist_destroy(&clone->sel_read.si_note); 311 ACPI_UNLOCK(acpi); 312 free(clone, M_APMDEV); 313 destroy_dev_sched(dev); 314 return (0); 315 } 316 317 static int 318 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, d_thread_t *td) 319 { 320 int error; 321 struct apm_clone_data *clone; 322 struct acpi_softc *acpi_sc; 323 struct apm_info info; 324 struct apm_event_info *ev_info; 325 apm_info_old_t aiop; 326 327 error = 0; 328 clone = dev->si_drv1; 329 acpi_sc = clone->acpi_sc; 330 331 switch (cmd) { 332 case APMIO_SUSPEND: 333 if ((flag & FWRITE) == 0) 334 return (EPERM); 335 if (acpi_sc->acpi_next_sstate == 0) { 336 if (acpi_sc->acpi_suspend_sx != ACPI_STATE_S5) { 337 error = acpi_ReqSleepState(acpi_sc, 338 acpi_sc->acpi_suspend_sx); 339 } else { 340 printf( 341 "power off via apm suspend not supported\n"); 342 error = ENXIO; 343 } 344 } else 345 error = acpi_AckSleepState(clone, 0); 346 break; 347 case APMIO_STANDBY: 348 if ((flag & FWRITE) == 0) 349 return (EPERM); 350 if (acpi_sc->acpi_next_sstate == 0) { 351 if (acpi_sc->acpi_standby_sx != ACPI_STATE_S5) { 352 error = acpi_ReqSleepState(acpi_sc, 353 acpi_sc->acpi_standby_sx); 354 } else { 355 printf( 356 "power off via apm standby not supported\n"); 357 error = ENXIO; 358 } 359 } else 360 error = acpi_AckSleepState(clone, 0); 361 break; 362 case APMIO_NEXTEVENT: 363 printf("apm nextevent start\n"); 364 ACPI_LOCK(acpi); 365 if (acpi_sc->acpi_next_sstate != 0 && clone->notify_status == 366 APM_EV_NONE) { 367 ev_info = (struct apm_event_info *)addr; 368 if (acpi_sc->acpi_next_sstate <= ACPI_STATE_S3) 369 ev_info->type = PMEV_STANDBYREQ; 370 else 371 ev_info->type = PMEV_SUSPENDREQ; 372 ev_info->index = 0; 373 clone->notify_status = APM_EV_NOTIFIED; 374 printf("apm event returning %d\n", ev_info->type); 375 } else 376 error = EAGAIN; 377 ACPI_UNLOCK(acpi); 378 break; 379 case APMIO_GETINFO_OLD: 380 if (acpi_capm_get_info(&info)) 381 error = ENXIO; 382 aiop = (apm_info_old_t)addr; 383 aiop->ai_major = info.ai_major; 384 aiop->ai_minor = info.ai_minor; 385 aiop->ai_acline = info.ai_acline; 386 aiop->ai_batt_stat = info.ai_batt_stat; 387 aiop->ai_batt_life = info.ai_batt_life; 388 aiop->ai_status = info.ai_status; 389 break; 390 case APMIO_GETINFO: 391 if (acpi_capm_get_info((apm_info_t)addr)) 392 error = ENXIO; 393 break; 394 case APMIO_GETPWSTATUS: 395 if (acpi_capm_get_pwstatus((apm_pwstatus_t)addr)) 396 error = ENXIO; 397 break; 398 case APMIO_ENABLE: 399 if ((flag & FWRITE) == 0) 400 return (EPERM); 401 apm_active = 1; 402 break; 403 case APMIO_DISABLE: 404 if ((flag & FWRITE) == 0) 405 return (EPERM); 406 apm_active = 0; 407 break; 408 case APMIO_HALTCPU: 409 break; 410 case APMIO_NOTHALTCPU: 411 break; 412 case APMIO_DISPLAY: 413 if ((flag & FWRITE) == 0) 414 return (EPERM); 415 break; 416 case APMIO_BIOS: 417 if ((flag & FWRITE) == 0) 418 return (EPERM); 419 bzero(addr, sizeof(struct apm_bios_arg)); 420 break; 421 default: 422 error = EINVAL; 423 break; 424 } 425 426 return (error); 427 } 428 429 static int 430 apmwrite(struct cdev *dev, struct uio *uio, int ioflag) 431 { 432 return (uio->uio_resid); 433 } 434 435 static int 436 apmpoll(struct cdev *dev, int events, d_thread_t *td) 437 { 438 struct apm_clone_data *clone; 439 int revents; 440 441 revents = 0; 442 ACPI_LOCK(acpi); 443 clone = dev->si_drv1; 444 if (clone->acpi_sc->acpi_next_sstate) 445 revents |= events & (POLLIN | POLLRDNORM); 446 else 447 selrecord(td, &clone->sel_read); 448 ACPI_UNLOCK(acpi); 449 return (revents); 450 } 451 452 static int 453 apmkqfilter(struct cdev *dev, struct knote *kn) 454 { 455 struct apm_clone_data *clone; 456 457 ACPI_LOCK(acpi); 458 clone = dev->si_drv1; 459 kn->kn_hook = clone; 460 kn->kn_fop = &apm_readfiltops; 461 knlist_add(&clone->sel_read.si_note, kn, 0); 462 ACPI_UNLOCK(acpi); 463 return (0); 464 } 465 466 static void 467 apmreadfiltdetach(struct knote *kn) 468 { 469 struct apm_clone_data *clone; 470 471 ACPI_LOCK(acpi); 472 clone = kn->kn_hook; 473 knlist_remove(&clone->sel_read.si_note, kn, 0); 474 ACPI_UNLOCK(acpi); 475 } 476 477 static int 478 apmreadfilt(struct knote *kn, long hint) 479 { 480 struct apm_clone_data *clone; 481 int sleeping; 482 483 ACPI_LOCK(acpi); 484 clone = kn->kn_hook; 485 sleeping = clone->acpi_sc->acpi_next_sstate ? 1 : 0; 486 ACPI_UNLOCK(acpi); 487 return (sleeping); 488 } 489 490 int 491 acpi_machdep_init(device_t dev) 492 { 493 struct acpi_softc *acpi_sc; 494 495 acpi_sc = devclass_get_softc(devclass_find("acpi"), 0); 496 497 /* Create a clone for /dev/acpi also. */ 498 STAILQ_INIT(&acpi_sc->apm_cdevs); 499 acpi_sc->acpi_clone = apm_create_clone(acpi_sc->acpi_dev_t, acpi_sc); 500 clone_setup(&apm_clones); 501 EVENTHANDLER_REGISTER(dev_clone, apm_clone, 0, 1000); 502 acpi_install_wakeup_handler(acpi_sc); 503 504 if (intr_model == ACPI_INTR_PIC) 505 BUS_CONFIG_INTR(dev, AcpiGbl_FADT.SciInterrupt, 506 INTR_TRIGGER_LEVEL, INTR_POLARITY_LOW); 507 else 508 acpi_SetIntrModel(intr_model); 509 510 SYSCTL_ADD_UINT(&acpi_sc->acpi_sysctl_ctx, 511 SYSCTL_CHILDREN(acpi_sc->acpi_sysctl_tree), OID_AUTO, 512 "reset_video", CTLFLAG_RW, &acpi_reset_video, 0, 513 "Call the VESA reset BIOS vector on the resume path"); 514 515 return (0); 516 } 517 518 void 519 acpi_SetDefaultIntrModel(int model) 520 { 521 522 intr_model = model; 523 } 524 525 /* Check BIOS date. If 1998 or older, disable ACPI. */ 526 int 527 acpi_machdep_quirks(int *quirks) 528 { 529 char *va; 530 int year; 531 532 /* BIOS address 0xffff5 contains the date in the format mm/dd/yy. */ 533 va = pmap_mapbios(0xffff0, 16); 534 sscanf(va + 11, "%2d", &year); 535 pmap_unmapbios((vm_offset_t)va, 16); 536 537 /* 538 * Date must be >= 1/1/1999 or we don't trust ACPI. Note that this 539 * check must be changed by my 114th birthday. 540 */ 541 if (year > 90 && year < 99) 542 *quirks = ACPI_Q_BROKEN; 543 544 return (0); 545 } 546 547 void 548 acpi_cpu_c1() 549 { 550 __asm __volatile("sti; hlt"); 551 }
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