apm.c revision 198707
1/*- 2 * APM (Advanced Power Management) BIOS Device Driver 3 * 4 * Copyright (c) 1994 UKAI, Fumitoshi. 5 * Copyright (c) 1994-1995 by HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 6 * Copyright (c) 1996 Nate Williams <nate@FreeBSD.org> 7 * Copyright (c) 1997 Poul-Henning Kamp <phk@FreeBSD.org> 8 * 9 * This software may be used, modified, copied, and distributed, in 10 * both source and binary form provided that the above copyright and 11 * these terms are retained. Under no circumstances is the author 12 * responsible for the proper functioning of this software, nor does 13 * the author assume any responsibility for damages incurred with its 14 * use. 15 * 16 * Sep, 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD) 17 */ 18 19#include <sys/cdefs.h> 20__FBSDID("$FreeBSD: head/sys/i386/bios/apm.c 198707 2009-10-31 10:38:30Z ed $"); 21 22#include <sys/param.h> 23#include <sys/systm.h> 24#include <sys/bus.h> 25#include <sys/conf.h> 26#include <sys/condvar.h> 27#include <sys/eventhandler.h> 28#include <sys/fcntl.h> 29#include <sys/kernel.h> 30#include <sys/kthread.h> 31#include <sys/lock.h> 32#include <sys/module.h> 33#include <sys/mutex.h> 34#include <sys/poll.h> 35#include <sys/power.h> 36#include <sys/reboot.h> 37#include <sys/selinfo.h> 38#include <sys/signalvar.h> 39#include <sys/sysctl.h> 40#include <sys/syslog.h> 41#include <sys/time.h> 42#include <sys/uio.h> 43 44#include <machine/apm_bios.h> 45#include <machine/clock.h> 46#include <machine/endian.h> 47#include <machine/pc/bios.h> 48#include <machine/cpufunc.h> 49#include <machine/segments.h> 50#include <machine/stdarg.h> 51#include <machine/vm86.h> 52 53#include <machine/bus.h> 54#include <machine/resource.h> 55#include <sys/rman.h> 56 57#include <vm/vm.h> 58#include <vm/pmap.h> 59#include <vm/vm_param.h> 60 61#include <i386/bios/apm.h> 62#include <isa/rtc.h> 63 64/* Used by the apm_saver screen saver module */ 65int apm_display(int newstate); 66struct apm_softc apm_softc; 67 68static void apm_resume(void); 69static int apm_bioscall(void); 70static int apm_check_function_supported(u_int version, u_int func); 71 72static int apm_pm_func(u_long, void*, ...); 73 74static u_long apm_version; 75 76int apm_evindex; 77 78#define SCFLAG_ONORMAL 0x0000001 79#define SCFLAG_OCTL 0x0000002 80#define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL) 81 82#define APMDEV_NORMAL 0 83#define APMDEV_CTL 1 84 85#ifdef PC98 86extern int bios32_apm98(struct bios_regs *, u_int, u_short); 87 88/* PC98's SMM definition */ 89#define APM_NECSMM_PORT 0x6b8e 90#define APM_NECSMM_PORTSZ 1 91#define APM_NECSMM_EN 0x10 92static __inline void apm_enable_smm(struct apm_softc *); 93static __inline void apm_disable_smm(struct apm_softc *); 94int apm_necsmm_addr; 95u_int32_t apm_necsmm_mask; 96#endif 97 98static struct apmhook *hook[NAPM_HOOK]; /* XXX */ 99 100#define is_enabled(foo) ((foo) ? "enabled" : "disabled") 101 102/* Map version number to integer (keeps ordering of version numbers) */ 103#define INTVERSION(major, minor) ((major)*100 + (minor)) 104 105static d_open_t apmopen; 106static d_close_t apmclose; 107static d_write_t apmwrite; 108static d_ioctl_t apmioctl; 109static d_poll_t apmpoll; 110 111static struct cdevsw apm_cdevsw = { 112 .d_version = D_VERSION, 113 .d_flags = D_NEEDGIANT, 114 .d_open = apmopen, 115 .d_close = apmclose, 116 .d_write = apmwrite, 117 .d_ioctl = apmioctl, 118 .d_poll = apmpoll, 119 .d_name = "apm", 120}; 121 122static int apm_suspend_delay = 1; 123static int apm_standby_delay = 1; 124static int apm_swab_batt_minutes = 0; 125static int apm_debug = 0; 126 127#define APM_DPRINT(args...) do { \ 128 if (apm_debug) { \ 129 printf(args); \ 130 } \ 131} while (0) 132 133SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, ""); 134SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, ""); 135SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, ""); 136 137TUNABLE_INT("machdep.apm_swab_batt_minutes", &apm_swab_batt_minutes); 138SYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RW, 139 &apm_swab_batt_minutes, 0, "Byte swap battery time value."); 140 141#ifdef PC98 142static __inline void 143apm_enable_smm(sc) 144 struct apm_softc *sc; 145{ 146 bus_space_tag_t iot = sc->sc_iot; 147 bus_space_handle_t ioh = sc->sc_ioh; 148 if (apm_necsmm_addr != 0) 149 bus_space_write_1(iot, ioh, 0, 150 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask)); 151} 152 153static __inline void 154apm_disable_smm(sc) 155 struct apm_softc *sc; 156{ 157 bus_space_tag_t iot = sc->sc_iot; 158 bus_space_handle_t ioh = sc->sc_ioh; 159 if (apm_necsmm_addr != 0) 160 bus_space_write_1(iot, ioh, 0, 161 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask)); 162} 163#endif 164 165/* 166 * return 0 if the function successfull, 167 * return 1 if the function unsuccessfull, 168 * return -1 if the function unsupported. 169 */ 170static int 171apm_bioscall(void) 172{ 173 struct apm_softc *sc = &apm_softc; 174 int errno = 0; 175 u_int apm_func = sc->bios.r.eax & 0xff; 176 177 if (!apm_check_function_supported(sc->intversion, apm_func)) { 178 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n", 179 apm_func, sc->majorversion, sc->minorversion); 180 return (-1); 181 } 182 183 sc->bios_busy = 1; 184#ifdef PC98 185 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG); 186 if (bios32_apm98(&sc->bios.r, sc->bios.entry, 187 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0) 188 return 1; 189#else 190 if (sc->connectmode == APM_PROT32CONNECT) { 191 set_bios_selectors(&sc->bios.seg, 192 BIOSCODE_FLAG | BIOSDATA_FLAG); 193 errno = bios32(&sc->bios.r, 194 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL)); 195 } else { 196 errno = bios16(&sc->bios, NULL); 197 } 198#endif 199 sc->bios_busy = 0; 200 return (errno); 201} 202 203/* check whether APM function is supported (1) or not (0). */ 204static int 205apm_check_function_supported(u_int version, u_int func) 206{ 207 /* except driver version */ 208 if (func == APM_DRVVERSION) { 209 return (1); 210 } 211#ifdef PC98 212 if (func == APM_GETPWSTATUS) { 213 return (1); 214 } 215#endif 216 217 switch (version) { 218 case INTVERSION(1, 0): 219 if (func > APM_GETPMEVENT) { 220 return (0); /* not supported */ 221 } 222 break; 223 case INTVERSION(1, 1): 224 if (func > APM_ENGAGEDISENGAGEPM && 225 func < APM_OEMFUNC) { 226 return (0); /* not supported */ 227 } 228 break; 229 case INTVERSION(1, 2): 230 break; 231 } 232 233 return (1); /* supported */ 234} 235 236/* enable/disable power management */ 237static int 238apm_enable_disable_pm(int enable) 239{ 240 struct apm_softc *sc = &apm_softc; 241 242 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM; 243 244 if (sc->intversion >= INTVERSION(1, 1)) 245 sc->bios.r.ebx = PMDV_ALLDEV; 246 else 247 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */ 248 sc->bios.r.ecx = enable; 249 sc->bios.r.edx = 0; 250 return (apm_bioscall()); 251} 252 253/* register driver version (APM 1.1 or later) */ 254static int 255apm_driver_version(int version) 256{ 257 struct apm_softc *sc = &apm_softc; 258 259 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION; 260 sc->bios.r.ebx = 0x0; 261 sc->bios.r.ecx = version; 262 sc->bios.r.edx = 0; 263 264 if (apm_bioscall() == 0 && sc->bios.r.eax == version) 265 return (0); 266 267 /* Some old BIOSes don't return the connection version in %ax. */ 268 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION)) 269 return (0); 270 271 return (1); 272} 273 274/* engage/disengage power management (APM 1.1 or later) */ 275static int 276apm_engage_disengage_pm(int engage) 277{ 278 struct apm_softc *sc = &apm_softc; 279 280 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM; 281 sc->bios.r.ebx = PMDV_ALLDEV; 282 sc->bios.r.ecx = engage; 283 sc->bios.r.edx = 0; 284 return (apm_bioscall()); 285} 286 287/* get PM event */ 288static u_int 289apm_getevent(void) 290{ 291 struct apm_softc *sc = &apm_softc; 292 293 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT; 294 295 sc->bios.r.ebx = 0; 296 sc->bios.r.ecx = 0; 297 sc->bios.r.edx = 0; 298 if (apm_bioscall()) 299 return (PMEV_NOEVENT); 300 return (sc->bios.r.ebx & 0xffff); 301} 302 303/* suspend entire system */ 304static int 305apm_suspend_system(int state) 306{ 307 struct apm_softc *sc = &apm_softc; 308 309 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 310 sc->bios.r.ebx = PMDV_ALLDEV; 311 sc->bios.r.ecx = state; 312 sc->bios.r.edx = 0; 313 314#ifdef PC98 315 apm_disable_smm(sc); 316#endif 317 if (apm_bioscall()) { 318 printf("Entire system suspend failure: errcode = %d\n", 319 0xff & (sc->bios.r.eax >> 8)); 320 return 1; 321 } 322#ifdef PC98 323 apm_enable_smm(sc); 324#endif 325 return 0; 326} 327 328/* Display control */ 329/* 330 * Experimental implementation: My laptop machine can't handle this function 331 * If your laptop can control the display via APM, please inform me. 332 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 333 */ 334int 335apm_display(int newstate) 336{ 337 struct apm_softc *sc = &apm_softc; 338 339 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 340 sc->bios.r.ebx = PMDV_DISP0; 341 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 342 sc->bios.r.edx = 0; 343 if (apm_bioscall() == 0) { 344 return 0; 345 } 346 347 /* If failed, then try to blank all display devices instead. */ 348 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 349 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */ 350 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 351 sc->bios.r.edx = 0; 352 if (apm_bioscall() == 0) { 353 return 0; 354 } 355 printf("Display off failure: errcode = %d\n", 356 0xff & (sc->bios.r.eax >> 8)); 357 return 1; 358} 359 360/* 361 * Turn off the entire system. 362 */ 363static void 364apm_power_off(void *junk, int howto) 365{ 366 struct apm_softc *sc = &apm_softc; 367 368 /* Not halting powering off, or not active */ 369 if (!(howto & RB_POWEROFF) || !apm_softc.active) 370 return; 371 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 372 sc->bios.r.ebx = PMDV_ALLDEV; 373 sc->bios.r.ecx = PMST_OFF; 374 sc->bios.r.edx = 0; 375 (void) apm_bioscall(); 376} 377 378/* APM Battery low handler */ 379static void 380apm_battery_low(void) 381{ 382 printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 383} 384 385/* APM hook manager */ 386static struct apmhook * 387apm_add_hook(struct apmhook **list, struct apmhook *ah) 388{ 389 int s; 390 struct apmhook *p, *prev; 391 392 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name); 393 394 s = splhigh(); 395 if (ah == NULL) 396 panic("illegal apm_hook!"); 397 prev = NULL; 398 for (p = *list; p != NULL; prev = p, p = p->ah_next) 399 if (p->ah_order > ah->ah_order) 400 break; 401 402 if (prev == NULL) { 403 ah->ah_next = *list; 404 *list = ah; 405 } else { 406 ah->ah_next = prev->ah_next; 407 prev->ah_next = ah; 408 } 409 splx(s); 410 return ah; 411} 412 413static void 414apm_del_hook(struct apmhook **list, struct apmhook *ah) 415{ 416 int s; 417 struct apmhook *p, *prev; 418 419 s = splhigh(); 420 prev = NULL; 421 for (p = *list; p != NULL; prev = p, p = p->ah_next) 422 if (p == ah) 423 goto deleteit; 424 panic("Tried to delete unregistered apm_hook."); 425 goto nosuchnode; 426deleteit: 427 if (prev != NULL) 428 prev->ah_next = p->ah_next; 429 else 430 *list = p->ah_next; 431nosuchnode: 432 splx(s); 433} 434 435 436/* APM driver calls some functions automatically */ 437static void 438apm_execute_hook(struct apmhook *list) 439{ 440 struct apmhook *p; 441 442 for (p = list; p != NULL; p = p->ah_next) { 443 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name); 444 if ((*(p->ah_fun))(p->ah_arg)) 445 printf("Warning: APM hook \"%s\" failed", p->ah_name); 446 } 447} 448 449 450/* establish an apm hook */ 451struct apmhook * 452apm_hook_establish(int apmh, struct apmhook *ah) 453{ 454 if (apmh < 0 || apmh >= NAPM_HOOK) 455 return NULL; 456 457 return apm_add_hook(&hook[apmh], ah); 458} 459 460/* disestablish an apm hook */ 461void 462apm_hook_disestablish(int apmh, struct apmhook *ah) 463{ 464 if (apmh < 0 || apmh >= NAPM_HOOK) 465 return; 466 467 apm_del_hook(&hook[apmh], ah); 468} 469 470static int apm_record_event(struct apm_softc *, u_int); 471static void apm_processevent(void); 472 473static u_int apm_op_inprog = 0; 474 475static void 476apm_do_suspend(void) 477{ 478 struct apm_softc *sc = &apm_softc; 479 int error; 480 481 if (sc == NULL || sc->initialized == 0) 482 return; 483 484 apm_op_inprog = 0; 485 sc->suspends = sc->suspend_countdown = 0; 486 487 /* 488 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since 489 * non-MPSAFE drivers need this. 490 */ 491 mtx_lock(&Giant); 492 error = DEVICE_SUSPEND(root_bus); 493 if (error) { 494 mtx_unlock(&Giant); 495 return; 496 } 497 498 apm_execute_hook(hook[APM_HOOK_SUSPEND]); 499 if (apm_suspend_system(PMST_SUSPEND) == 0) { 500 sc->suspending = 1; 501 apm_processevent(); 502 } else { 503 /* Failure, 'resume' the system again */ 504 apm_execute_hook(hook[APM_HOOK_RESUME]); 505 DEVICE_RESUME(root_bus); 506 } 507 mtx_unlock(&Giant); 508 return; 509} 510 511static void 512apm_do_standby(void) 513{ 514 struct apm_softc *sc = &apm_softc; 515 516 if (sc == NULL || sc->initialized == 0) 517 return; 518 519 apm_op_inprog = 0; 520 sc->standbys = sc->standby_countdown = 0; 521 522 /* 523 * As far as standby, we don't need to execute 524 * all of suspend hooks. 525 */ 526 if (apm_suspend_system(PMST_STANDBY) == 0) 527 apm_processevent(); 528 return; 529} 530 531static void 532apm_lastreq_notify(void) 533{ 534 struct apm_softc *sc = &apm_softc; 535 536 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 537 sc->bios.r.ebx = PMDV_ALLDEV; 538 sc->bios.r.ecx = PMST_LASTREQNOTIFY; 539 sc->bios.r.edx = 0; 540 apm_bioscall(); 541} 542 543static int 544apm_lastreq_rejected(void) 545{ 546 struct apm_softc *sc = &apm_softc; 547 548 if (apm_op_inprog == 0) { 549 return 1; /* no operation in progress */ 550 } 551 552 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 553 sc->bios.r.ebx = PMDV_ALLDEV; 554 sc->bios.r.ecx = PMST_LASTREQREJECT; 555 sc->bios.r.edx = 0; 556 557 if (apm_bioscall()) { 558 APM_DPRINT("apm_lastreq_rejected: failed\n"); 559 return 1; 560 } 561 apm_op_inprog = 0; 562 return 0; 563} 564 565/* 566 * Public interface to the suspend/resume: 567 * 568 * Execute suspend and resume hook before and after sleep, respectively. 569 * 570 */ 571 572void 573apm_suspend(int state) 574{ 575 struct apm_softc *sc = &apm_softc; 576 577 if (sc == NULL || sc->initialized == 0) 578 return; 579 580 switch (state) { 581 case PMST_SUSPEND: 582 if (sc->suspends) 583 return; 584 sc->suspends++; 585 sc->suspend_countdown = apm_suspend_delay; 586 break; 587 case PMST_STANDBY: 588 if (sc->standbys) 589 return; 590 sc->standbys++; 591 sc->standby_countdown = apm_standby_delay; 592 break; 593 default: 594 printf("apm_suspend: Unknown Suspend state 0x%x\n", state); 595 return; 596 } 597 598 apm_op_inprog++; 599 apm_lastreq_notify(); 600} 601 602static void 603apm_resume(void) 604{ 605 struct apm_softc *sc = &apm_softc; 606 607 if (sc == NULL || sc->initialized == 0 || sc->suspending == 0) 608 return; 609 610 sc->suspending = 0; 611 apm_execute_hook(hook[APM_HOOK_RESUME]); 612 mtx_lock(&Giant); 613 DEVICE_RESUME(root_bus); 614 mtx_unlock(&Giant); 615 return; 616} 617 618 619/* get power status per battery */ 620static int 621apm_get_pwstatus(apm_pwstatus_t app) 622{ 623 struct apm_softc *sc = &apm_softc; 624 625 if (app->ap_device != PMDV_ALLDEV && 626 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL)) 627 return 1; 628 629 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 630 sc->bios.r.ebx = app->ap_device; 631 sc->bios.r.ecx = 0; 632 sc->bios.r.edx = 0xffff; /* default to unknown battery time */ 633 634 if (apm_bioscall()) 635 return 1; 636 637 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff; 638 app->ap_batt_stat = sc->bios.r.ebx & 0xff; 639 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff; 640 app->ap_batt_life = sc->bios.r.ecx & 0xff; 641 sc->bios.r.edx &= 0xffff; 642 if (apm_swab_batt_minutes) 643 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000; 644 if (sc->bios.r.edx == 0xffff) /* Time is unknown */ 645 app->ap_batt_time = -1; 646 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */ 647 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60; 648 else /* Time is in seconds */ 649 app->ap_batt_time = sc->bios.r.edx; 650 651 return 0; 652} 653 654 655/* get APM information */ 656static int 657apm_get_info(apm_info_t aip) 658{ 659 struct apm_softc *sc = &apm_softc; 660 struct apm_pwstatus aps; 661 662 bzero(&aps, sizeof(aps)); 663 aps.ap_device = PMDV_ALLDEV; 664 if (apm_get_pwstatus(&aps)) 665 return 1; 666 667 aip->ai_infoversion = 1; 668 aip->ai_acline = aps.ap_acline; 669 aip->ai_batt_stat = aps.ap_batt_stat; 670 aip->ai_batt_life = aps.ap_batt_life; 671 aip->ai_batt_time = aps.ap_batt_time; 672 aip->ai_major = (u_int)sc->majorversion; 673 aip->ai_minor = (u_int)sc->minorversion; 674 aip->ai_status = (u_int)sc->active; 675 676 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 677 sc->bios.r.ebx = 0; 678 sc->bios.r.ecx = 0; 679 sc->bios.r.edx = 0; 680 if (apm_bioscall()) { 681 aip->ai_batteries = 0xffffffff; /* Unknown */ 682 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 683 } else { 684 aip->ai_batteries = sc->bios.r.ebx & 0xff; 685 aip->ai_capabilities = sc->bios.r.ecx & 0xff; 686 } 687 688 bzero(aip->ai_spare, sizeof aip->ai_spare); 689 690 return 0; 691} 692 693 694/* inform APM BIOS that CPU is idle */ 695void 696apm_cpu_idle(void) 697{ 698 struct apm_softc *sc = &apm_softc; 699 700 if (sc->active) { 701 702 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE; 703 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 704 (void) apm_bioscall(); 705 } 706 /* 707 * Some APM implementation halts CPU in BIOS, whenever 708 * "CPU-idle" function are invoked, but swtch() of 709 * FreeBSD halts CPU, therefore, CPU is halted twice 710 * in the sched loop. It makes the interrupt latency 711 * terribly long and be able to cause a serious problem 712 * in interrupt processing. We prevent it by removing 713 * "hlt" operation from swtch() and managed it under 714 * APM driver. 715 */ 716 if (!sc->active || sc->always_halt_cpu) 717 halt(); /* wait for interrupt */ 718} 719 720/* inform APM BIOS that CPU is busy */ 721void 722apm_cpu_busy(void) 723{ 724 struct apm_softc *sc = &apm_softc; 725 726 /* 727 * The APM specification says this is only necessary if your BIOS 728 * slows down the processor in the idle task, otherwise it's not 729 * necessary. 730 */ 731 if (sc->slow_idle_cpu && sc->active) { 732 733 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY; 734 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 735 apm_bioscall(); 736 } 737} 738 739 740/* 741 * APM thread loop. 742 * 743 * This routine wakes up from time to time to deal with delaying the 744 * suspend of the system, or other events. 745 */ 746static void 747apm_event_thread(void *arg) 748{ 749 struct apm_softc *sc = &apm_softc; 750 751 sc->running = 1; 752 while (sc->active) { 753 if (apm_op_inprog) 754 apm_lastreq_notify(); 755 if (sc->standbys && sc->standby_countdown-- <= 0) 756 apm_do_standby(); 757 if (sc->suspends && sc->suspend_countdown-- <= 0) 758 apm_do_suspend(); 759 if (!sc->bios_busy) 760 apm_processevent(); 761 mtx_lock(&sc->mtx); 762 cv_timedwait(&sc->cv, &sc->mtx, 10 * hz / 9); 763 mtx_unlock(&sc->mtx); 764 } 765 sc->running = 0; 766 kproc_exit(0); 767} 768 769/* enable APM BIOS */ 770static void 771apm_event_enable(void) 772{ 773 struct apm_softc *sc = &apm_softc; 774 775 APM_DPRINT("called apm_event_enable()\n"); 776 777 if (sc == NULL || sc->initialized == 0) 778 return; 779 780 /* Start the thread */ 781 sc->active = 1; 782 if (kproc_create(apm_event_thread, sc, &sc->event_thread, 0, 0, 783 "apm worker")) 784 panic("Cannot create apm worker thread"); 785 786 return; 787} 788 789/* disable APM BIOS */ 790static void 791apm_event_disable(void) 792{ 793 struct apm_softc *sc = &apm_softc; 794 795 APM_DPRINT("called apm_event_disable()\n"); 796 797 if (sc == NULL || sc->initialized == 0) 798 return; 799 800 mtx_lock(&sc->mtx); 801 sc->active = 0; 802 while (sc->running) { 803 cv_broadcast(&sc->cv); 804 msleep(sc->event_thread, &sc->mtx, PWAIT, "apmdie", 0); 805 } 806 mtx_unlock(&sc->mtx); 807 sc->event_thread = NULL; 808 return; 809} 810 811/* halt CPU in scheduling loop */ 812static void 813apm_halt_cpu(void) 814{ 815 struct apm_softc *sc = &apm_softc; 816 817 if (sc == NULL || sc->initialized == 0) 818 return; 819 820 sc->always_halt_cpu = 1; 821 822 return; 823} 824 825/* don't halt CPU in scheduling loop */ 826static void 827apm_not_halt_cpu(void) 828{ 829 struct apm_softc *sc = &apm_softc; 830 831 if (sc == NULL || sc->initialized == 0) 832 return; 833 834 sc->always_halt_cpu = 0; 835 836 return; 837} 838 839/* device driver definitions */ 840 841/* 842 * Module event 843 */ 844 845static int 846apm_modevent(struct module *mod, int event, void *junk) 847{ 848 849 switch (event) { 850 case MOD_LOAD: 851 if (!cold) 852 return (EPERM); 853 break; 854 case MOD_UNLOAD: 855 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM) 856 return (EBUSY); 857 break; 858 default: 859 break; 860 } 861 862 return (0); 863} 864 865/* 866 * Create "connection point" 867 */ 868static void 869apm_identify(driver_t *driver, device_t parent) 870{ 871 device_t child; 872 873 if (!cold) { 874 printf("Don't load this driver from userland!!\n"); 875 return; 876 } 877 878 if (resource_disabled("apm", 0)) 879 return; 880 881 child = BUS_ADD_CHILD(parent, 0, "apm", 0); 882 if (child == NULL) 883 panic("apm_identify"); 884} 885 886/* 887 * probe for APM BIOS 888 */ 889static int 890apm_probe(device_t dev) 891{ 892#define APM_KERNBASE KERNBASE 893 struct vm86frame vmf; 894 struct apm_softc *sc = &apm_softc; 895#ifdef PC98 896 int rid; 897#endif 898 899 device_set_desc(dev, "APM BIOS"); 900 if (device_get_unit(dev) > 0) { 901 printf("apm: Only one APM driver supported.\n"); 902 return ENXIO; 903 } 904 905 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 906 power_pm_get_type() != POWER_PM_TYPE_APM) { 907 printf("apm: Other PM system enabled.\n"); 908 return ENXIO; 909 } 910 911 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 912 bzero(&apm_softc, sizeof(apm_softc)); 913 vmf.vmf_ah = APM_BIOS; 914 vmf.vmf_al = APM_INSTCHECK; 915 vmf.vmf_bx = 0; 916 if (vm86_intcall(APM_INT, &vmf)) 917 return ENXIO; /* APM not found */ 918 if (vmf.vmf_bx != 0x504d) { 919 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); 920 return ENXIO; 921 } 922 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { 923 printf("apm: protected mode connections are not supported\n"); 924 return ENXIO; 925 } 926 927 apm_version = vmf.vmf_ax; 928 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); 929 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); 930 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); 931 932 vmf.vmf_ah = APM_BIOS; 933 vmf.vmf_al = APM_DISCONNECT; 934 vmf.vmf_bx = 0; 935 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ 936 937#ifdef PC98 938 /* PC98 have bogos APM 32bit BIOS */ 939 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0) 940 return ENXIO; 941 rid = 0; 942 bus_set_resource(dev, SYS_RES_IOPORT, rid, 943 APM_NECSMM_PORT, APM_NECSMM_PORTSZ); 944 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 945 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 946 if (sc->sc_res == NULL) { 947 printf("apm: cannot open NEC smm device\n"); 948 return ENXIO; 949 } 950 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res); 951 952 vmf.vmf_ah = APM_BIOS; 953 vmf.vmf_al = APM_PROT32CONNECT; 954 vmf.vmf_bx = 0; 955 if (vm86_intcall(APM_INT, &vmf)) { 956 printf("apm: 32-bit connection error.\n"); 957 return (ENXIO); 958 } 959 960 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 961 sc->bios.seg.code32.limit = 0xffff; 962 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 963 sc->bios.seg.code16.limit = 0xffff; 964 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 965 sc->bios.seg.data.limit = 0xffff; 966 sc->bios.entry = vmf.vmf_ebx; 967 sc->connectmode = APM_PROT32CONNECT; 968#else 969 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 970 vmf.vmf_ah = APM_BIOS; 971 vmf.vmf_al = APM_PROT32CONNECT; 972 vmf.vmf_bx = 0; 973 if (vm86_intcall(APM_INT, &vmf)) { 974 printf("apm: 32-bit connection error.\n"); 975 return (ENXIO); 976 } 977 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 978 sc->bios.seg.code32.limit = 0xffff; 979 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 980 sc->bios.seg.code16.limit = 0xffff; 981 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 982 sc->bios.seg.data.limit = 0xffff; 983 sc->bios.entry = vmf.vmf_ebx; 984 sc->connectmode = APM_PROT32CONNECT; 985 } else { 986 /* use 16-bit connection */ 987 vmf.vmf_ah = APM_BIOS; 988 vmf.vmf_al = APM_PROT16CONNECT; 989 vmf.vmf_bx = 0; 990 if (vm86_intcall(APM_INT, &vmf)) { 991 printf("apm: 16-bit connection error.\n"); 992 return (ENXIO); 993 } 994 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 995 sc->bios.seg.code16.limit = 0xffff; 996 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 997 sc->bios.seg.data.limit = 0xffff; 998 sc->bios.entry = vmf.vmf_bx; 999 sc->connectmode = APM_PROT16CONNECT; 1000 } 1001#endif 1002 return(0); 1003} 1004 1005 1006/* 1007 * return 0 if the user will notice and handle the event, 1008 * return 1 if the kernel driver should do so. 1009 */ 1010static int 1011apm_record_event(struct apm_softc *sc, u_int event_type) 1012{ 1013 struct apm_event_info *evp; 1014 1015 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 1016 return 1; /* no user waiting */ 1017 if (sc->event_count == APM_NEVENTS) 1018 return 1; /* overflow */ 1019 if (sc->event_filter[event_type] == 0) 1020 return 1; /* not registered */ 1021 evp = &sc->event_list[sc->event_ptr]; 1022 sc->event_count++; 1023 sc->event_ptr++; 1024 sc->event_ptr %= APM_NEVENTS; 1025 evp->type = event_type; 1026 evp->index = ++apm_evindex; 1027 selwakeuppri(&sc->sc_rsel, PZERO); 1028 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 1029} 1030 1031/* Power profile */ 1032static void 1033apm_power_profile(struct apm_softc *sc) 1034{ 1035 int state; 1036 struct apm_info info; 1037 static int apm_acline = 0; 1038 1039 if (apm_get_info(&info)) 1040 return; 1041 1042 if (apm_acline != info.ai_acline) { 1043 apm_acline = info.ai_acline; 1044 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY; 1045 power_profile_set_state(state); 1046 } 1047} 1048 1049/* Process APM event */ 1050static void 1051apm_processevent(void) 1052{ 1053 int apm_event; 1054 struct apm_softc *sc = &apm_softc; 1055 1056#define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 1057 APM_DPRINT("Received APM Event: " #symbol "\n"); 1058 1059 do { 1060 apm_event = apm_getevent(); 1061 switch (apm_event) { 1062 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 1063 if (apm_op_inprog == 0) { 1064 apm_op_inprog++; 1065 if (apm_record_event(sc, apm_event)) { 1066 apm_suspend(PMST_STANDBY); 1067 } 1068 } 1069 break; 1070 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); 1071 if (apm_op_inprog == 0) { 1072 apm_op_inprog++; 1073 if (apm_record_event(sc, apm_event)) { 1074 apm_suspend(PMST_STANDBY); 1075 } 1076 } 1077 break; 1078 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 1079 apm_lastreq_notify(); 1080 if (apm_op_inprog == 0) { 1081 apm_op_inprog++; 1082 if (apm_record_event(sc, apm_event)) { 1083 apm_do_suspend(); 1084 } 1085 } 1086 return; /* XXX skip the rest */ 1087 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 1088 apm_lastreq_notify(); 1089 if (apm_op_inprog == 0) { 1090 apm_op_inprog++; 1091 if (apm_record_event(sc, apm_event)) { 1092 apm_do_suspend(); 1093 } 1094 } 1095 return; /* XXX skip the rest */ 1096 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 1097 apm_do_suspend(); 1098 break; 1099 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 1100 apm_record_event(sc, apm_event); 1101 apm_resume(); 1102 break; 1103 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 1104 apm_record_event(sc, apm_event); 1105 apm_resume(); 1106 break; 1107 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 1108 apm_record_event(sc, apm_event); 1109 break; 1110 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 1111 if (apm_record_event(sc, apm_event)) { 1112 apm_battery_low(); 1113 apm_suspend(PMST_SUSPEND); 1114 } 1115 break; 1116 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 1117 apm_record_event(sc, apm_event); 1118 apm_power_profile(sc); 1119 break; 1120 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 1121 apm_record_event(sc, apm_event); 1122 inittodr(0); /* adjust time to RTC */ 1123 break; 1124 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); 1125 apm_record_event(sc, apm_event); 1126 apm_power_profile(sc); 1127 break; 1128 case PMEV_NOEVENT: 1129 break; 1130 default: 1131 printf("Unknown Original APM Event 0x%x\n", apm_event); 1132 break; 1133 } 1134 } while (apm_event != PMEV_NOEVENT); 1135#ifdef PC98 1136 apm_disable_smm(sc); 1137#endif 1138} 1139 1140/* 1141 * Attach APM: 1142 * 1143 * Initialize APM driver 1144 */ 1145 1146static int 1147apm_attach(device_t dev) 1148{ 1149 struct apm_softc *sc = &apm_softc; 1150 int drv_version; 1151#ifdef PC98 1152 int rid; 1153#endif 1154 mtx_init(&sc->mtx, device_get_nameunit(dev), "apm", MTX_DEF); 1155 cv_init(&sc->cv, "cbb cv"); 1156 1157#ifndef PC98 1158 if (device_get_flags(dev) & 0x20) 1159 atrtcclock_disable = 1; 1160#endif 1161 1162 sc->initialized = 0; 1163 1164 /* Must be externally enabled */ 1165 sc->active = 0; 1166 1167 /* Always call HLT in idle loop */ 1168 sc->always_halt_cpu = 1; 1169 1170 getenv_int("debug.apm_debug", &apm_debug); 1171 1172 /* print bootstrap messages */ 1173 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version); 1174 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n", 1175 sc->bios.seg.code16.base, sc->bios.seg.data.base); 1176 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 1177 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 1178 is_enabled(!sc->disabled)); 1179 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n", 1180 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 1181 1182#ifdef PC98 1183 rid = 0; 1184 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1185 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 1186 if (sc->sc_res == NULL) 1187 panic("%s: counldn't map I/O ports", device_get_name(dev)); 1188 sc->sc_iot = rman_get_bustag(sc->sc_res); 1189 sc->sc_ioh = rman_get_bushandle(sc->sc_res); 1190 1191 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110) 1192 apm_necsmm_addr = APM_NECSMM_PORT; 1193 else 1194 apm_necsmm_addr = 0; 1195 apm_necsmm_mask = ~APM_NECSMM_EN; 1196#endif /* PC98 */ 1197 1198 /* 1199 * In one test, apm bios version was 1.02; an attempt to register 1200 * a 1.04 driver resulted in a 1.00 connection! Registering a 1201 * 1.02 driver resulted in a 1.02 connection. 1202 */ 1203 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 1204 for (; drv_version > 0x100; drv_version--) 1205 if (apm_driver_version(drv_version) == 0) 1206 break; 1207 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 1208 ((drv_version & 0x000f) >> 0); 1209 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 1210 ((apm_version & 0x0f00) >> 8); 1211 1212 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1213 1214 if (sc->intversion >= INTVERSION(1, 1)) 1215 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1216 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n", 1217 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 1218 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 1219 sc->majorversion, sc->minorversion); 1220 1221 1222 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1223 /* enable power management */ 1224 if (sc->disabled) { 1225 if (apm_enable_disable_pm(1)) { 1226 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n", 1227 (sc->bios.r.eax >> 8) & 0xff); 1228 } 1229 } 1230 1231 /* engage power managment (APM 1.1 or later) */ 1232 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1233 if (apm_engage_disengage_pm(1)) { 1234 APM_DPRINT("apm: *Warning* engage function failed err=[%x]", 1235 (sc->bios.r.eax >> 8) & 0xff); 1236 APM_DPRINT(" (Docked or using external power?).\n"); 1237 } 1238 } 1239 1240 /* Power the system off using APM */ 1241 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 1242 SHUTDOWN_PRI_LAST); 1243 1244 /* Register APM again to pass the correct argument of pm_func. */ 1245 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc); 1246 1247 sc->initialized = 1; 1248 sc->suspending = 0; 1249 sc->running = 0; 1250 1251 make_dev(&apm_cdevsw, APMDEV_NORMAL, 1252 UID_ROOT, GID_OPERATOR, 0664, "apm"); 1253 make_dev(&apm_cdevsw, APMDEV_CTL, 1254 UID_ROOT, GID_OPERATOR, 0660, "apmctl"); 1255 return 0; 1256} 1257 1258static int 1259apmopen(struct cdev *dev, int flag, int fmt, struct thread *td) 1260{ 1261 struct apm_softc *sc = &apm_softc; 1262 1263 if (sc == NULL || sc->initialized == 0) 1264 return (ENXIO); 1265 1266 switch (dev2unit(dev)) { 1267 case APMDEV_CTL: 1268 if (!(flag & FWRITE)) 1269 return EINVAL; 1270 if (sc->sc_flags & SCFLAG_OCTL) 1271 return EBUSY; 1272 sc->sc_flags |= SCFLAG_OCTL; 1273 bzero(sc->event_filter, sizeof sc->event_filter); 1274 break; 1275 case APMDEV_NORMAL: 1276 sc->sc_flags |= SCFLAG_ONORMAL; 1277 break; 1278 } 1279 return 0; 1280} 1281 1282static int 1283apmclose(struct cdev *dev, int flag, int fmt, struct thread *td) 1284{ 1285 struct apm_softc *sc = &apm_softc; 1286 1287 switch (dev2unit(dev)) { 1288 case APMDEV_CTL: 1289 apm_lastreq_rejected(); 1290 sc->sc_flags &= ~SCFLAG_OCTL; 1291 bzero(sc->event_filter, sizeof sc->event_filter); 1292 break; 1293 case APMDEV_NORMAL: 1294 sc->sc_flags &= ~SCFLAG_ONORMAL; 1295 break; 1296 } 1297 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1298 sc->event_count = 0; 1299 sc->event_ptr = 0; 1300 } 1301 return 0; 1302} 1303 1304static int 1305apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1306{ 1307 struct apm_softc *sc = &apm_softc; 1308 struct apm_bios_arg *args; 1309 int error = 0; 1310 int ret; 1311 int newstate; 1312 1313 if (sc == NULL || sc->initialized == 0) 1314 return (ENXIO); 1315 1316 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd); 1317 switch (cmd) { 1318 case APMIO_SUSPEND: 1319 if (!(flag & FWRITE)) 1320 return (EPERM); 1321 if (sc->active) 1322 apm_suspend(PMST_SUSPEND); 1323 else 1324 error = EINVAL; 1325 break; 1326 1327 case APMIO_STANDBY: 1328 if (!(flag & FWRITE)) 1329 return (EPERM); 1330 if (sc->active) 1331 apm_suspend(PMST_STANDBY); 1332 else 1333 error = EINVAL; 1334 break; 1335 1336 case APMIO_GETINFO_OLD: 1337 { 1338 struct apm_info info; 1339 apm_info_old_t aiop; 1340 1341 if (apm_get_info(&info)) 1342 error = ENXIO; 1343 aiop = (apm_info_old_t)addr; 1344 aiop->ai_major = info.ai_major; 1345 aiop->ai_minor = info.ai_minor; 1346 aiop->ai_acline = info.ai_acline; 1347 aiop->ai_batt_stat = info.ai_batt_stat; 1348 aiop->ai_batt_life = info.ai_batt_life; 1349 aiop->ai_status = info.ai_status; 1350 } 1351 break; 1352 case APMIO_GETINFO: 1353 if (apm_get_info((apm_info_t)addr)) 1354 error = ENXIO; 1355 break; 1356 case APMIO_GETPWSTATUS: 1357 if (apm_get_pwstatus((apm_pwstatus_t)addr)) 1358 error = ENXIO; 1359 break; 1360 case APMIO_ENABLE: 1361 if (!(flag & FWRITE)) 1362 return (EPERM); 1363 apm_event_enable(); 1364 break; 1365 case APMIO_DISABLE: 1366 if (!(flag & FWRITE)) 1367 return (EPERM); 1368 apm_event_disable(); 1369 break; 1370 case APMIO_HALTCPU: 1371 if (!(flag & FWRITE)) 1372 return (EPERM); 1373 apm_halt_cpu(); 1374 break; 1375 case APMIO_NOTHALTCPU: 1376 if (!(flag & FWRITE)) 1377 return (EPERM); 1378 apm_not_halt_cpu(); 1379 break; 1380 case APMIO_DISPLAY: 1381 if (!(flag & FWRITE)) 1382 return (EPERM); 1383 newstate = *(int *)addr; 1384 if (apm_display(newstate)) 1385 error = ENXIO; 1386 break; 1387 case APMIO_BIOS: 1388 if (!(flag & FWRITE)) 1389 return (EPERM); 1390 /* XXX compatibility with the old interface */ 1391 args = (struct apm_bios_arg *)addr; 1392 sc->bios.r.eax = args->eax; 1393 sc->bios.r.ebx = args->ebx; 1394 sc->bios.r.ecx = args->ecx; 1395 sc->bios.r.edx = args->edx; 1396 sc->bios.r.esi = args->esi; 1397 sc->bios.r.edi = args->edi; 1398 if ((ret = apm_bioscall())) { 1399 /* 1400 * Return code 1 means bios call was unsuccessful. 1401 * Error code is stored in %ah. 1402 * Return code -1 means bios call was unsupported 1403 * in the APM BIOS version. 1404 */ 1405 if (ret == -1) { 1406 error = EINVAL; 1407 } 1408 } else { 1409 /* 1410 * Return code 0 means bios call was successful. 1411 * We need only %al and can discard %ah. 1412 */ 1413 sc->bios.r.eax &= 0xff; 1414 } 1415 args->eax = sc->bios.r.eax; 1416 args->ebx = sc->bios.r.ebx; 1417 args->ecx = sc->bios.r.ecx; 1418 args->edx = sc->bios.r.edx; 1419 args->esi = sc->bios.r.esi; 1420 args->edi = sc->bios.r.edi; 1421 break; 1422 default: 1423 error = EINVAL; 1424 break; 1425 } 1426 1427 /* for /dev/apmctl */ 1428 if (dev2unit(dev) == APMDEV_CTL) { 1429 struct apm_event_info *evp; 1430 int i; 1431 1432 error = 0; 1433 switch (cmd) { 1434 case APMIO_NEXTEVENT: 1435 if (!sc->event_count) { 1436 error = EAGAIN; 1437 } else { 1438 evp = (struct apm_event_info *)addr; 1439 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1440 i %= APM_NEVENTS; 1441 *evp = sc->event_list[i]; 1442 sc->event_count--; 1443 } 1444 break; 1445 case APMIO_REJECTLASTREQ: 1446 if (apm_lastreq_rejected()) { 1447 error = EINVAL; 1448 } 1449 break; 1450 default: 1451 error = EINVAL; 1452 break; 1453 } 1454 } 1455 1456 return error; 1457} 1458 1459static int 1460apmwrite(struct cdev *dev, struct uio *uio, int ioflag) 1461{ 1462 struct apm_softc *sc = &apm_softc; 1463 u_int event_type; 1464 int error; 1465 u_char enabled; 1466 1467 if (dev2unit(dev) != APMDEV_CTL) 1468 return(ENODEV); 1469 if (uio->uio_resid != sizeof(u_int)) 1470 return(E2BIG); 1471 1472 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1473 return(error); 1474 1475 if (event_type < 0 || event_type >= APM_NPMEV) 1476 return(EINVAL); 1477 1478 if (sc->event_filter[event_type] == 0) { 1479 enabled = 1; 1480 } else { 1481 enabled = 0; 1482 } 1483 sc->event_filter[event_type] = enabled; 1484 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1485 1486 return uio->uio_resid; 1487} 1488 1489static int 1490apmpoll(struct cdev *dev, int events, struct thread *td) 1491{ 1492 struct apm_softc *sc = &apm_softc; 1493 int revents = 0; 1494 1495 if (events & (POLLIN | POLLRDNORM)) { 1496 if (sc->event_count) { 1497 revents |= events & (POLLIN | POLLRDNORM); 1498 } else { 1499 selrecord(td, &sc->sc_rsel); 1500 } 1501 } 1502 1503 return (revents); 1504} 1505 1506static device_method_t apm_methods[] = { 1507 /* Device interface */ 1508 DEVMETHOD(device_identify, apm_identify), 1509 DEVMETHOD(device_probe, apm_probe), 1510 DEVMETHOD(device_attach, apm_attach), 1511 1512 { 0, 0 } 1513}; 1514 1515static driver_t apm_driver = { 1516 "apm", 1517 apm_methods, 1518 1, /* no softc (XXX) */ 1519}; 1520 1521static devclass_t apm_devclass; 1522 1523DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0); 1524MODULE_VERSION(apm, 1); 1525 1526static int 1527apm_pm_func(u_long cmd, void *arg, ...) 1528{ 1529 int state, apm_state; 1530 int error; 1531 va_list ap; 1532 1533 error = 0; 1534 switch (cmd) { 1535 case POWER_CMD_SUSPEND: 1536 va_start(ap, arg); 1537 state = va_arg(ap, int); 1538 va_end(ap); 1539 1540 switch (state) { 1541 case POWER_SLEEP_STATE_STANDBY: 1542 apm_state = PMST_STANDBY; 1543 break; 1544 case POWER_SLEEP_STATE_SUSPEND: 1545 case POWER_SLEEP_STATE_HIBERNATE: 1546 apm_state = PMST_SUSPEND; 1547 break; 1548 default: 1549 error = EINVAL; 1550 goto out; 1551 } 1552 1553 apm_suspend(apm_state); 1554 break; 1555 1556 default: 1557 error = EINVAL; 1558 goto out; 1559 } 1560 1561out: 1562 return (error); 1563} 1564 1565static void 1566apm_pm_register(void *arg) 1567{ 1568 1569 if (!resource_disabled("apm", 0)) 1570 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL); 1571} 1572 1573SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0); 1574