apm.c revision 40751
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 * $Id: apm.c,v 1.74 1998/09/28 03:41:12 jlemon Exp $ 19 */ 20 21#include "opt_devfs.h" 22#include "opt_vm86.h" 23 24#include <sys/param.h> 25#include <sys/conf.h> 26#include <sys/kernel.h> 27#ifdef DEVFS 28#include <sys/devfsext.h> 29#endif /*DEVFS*/ 30#include <sys/systm.h> 31#include <sys/time.h> 32#include <sys/reboot.h> 33#include <i386/isa/isa_device.h> 34#include <machine/apm_bios.h> 35#include <machine/segments.h> 36#include <machine/clock.h> 37#include <vm/vm.h> 38#include <vm/vm_param.h> 39#include <vm/pmap.h> 40#include <sys/syslog.h> 41#include <i386/apm/apm_setup.h> 42 43#ifdef VM86 44#include <machine/psl.h> 45#include <machine/vm86.h> 46#endif 47 48static int apm_display __P((int newstate)); 49static int apm_int __P((u_long *eax, u_long *ebx, u_long *ecx, u_long *edx)); 50static void apm_resume __P((void)); 51 52/* static data */ 53struct apm_softc { 54 int initialized, active; 55 int always_halt_cpu, slow_idle_cpu; 56 int disabled, disengaged; 57 u_int minorversion, majorversion; 58 u_int cs32_base, cs16_base, ds_base; 59 u_int cs16_limit, cs32_limit, ds_limit; 60 u_int cs_entry; 61 u_int intversion; 62 struct apmhook sc_suspend; 63 struct apmhook sc_resume; 64#ifdef DEVFS 65 void *sc_devfs_token; 66#endif 67}; 68 69static struct apm_softc apm_softc; 70static struct apmhook *hook[NAPM_HOOK]; /* XXX */ 71 72#define is_enabled(foo) ((foo) ? "enabled" : "disabled") 73 74/* Map version number to integer (keeps ordering of version numbers) */ 75#define INTVERSION(major, minor) ((major)*100 + (minor)) 76 77static struct callout_handle apm_timeout_ch = 78 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch); 79 80static timeout_t apm_timeout; 81static d_open_t apmopen; 82static d_close_t apmclose; 83static d_ioctl_t apmioctl; 84 85#define CDEV_MAJOR 39 86static struct cdevsw apm_cdevsw = 87 { apmopen, apmclose, noread, nowrite, /*39*/ 88 apmioctl, nostop, nullreset, nodevtotty,/* APM */ 89 seltrue, nommap, NULL , "apm" ,NULL, -1}; 90 91/* setup APM GDT discriptors */ 92static void 93setup_apm_gdt(u_int code32_base, u_int code16_base, u_int data_base, u_int code32_limit, u_int code16_limit, u_int data_limit) 94{ 95 /* setup 32bit code segment */ 96 gdt_segs[GAPMCODE32_SEL].ssd_base = code32_base; 97 gdt_segs[GAPMCODE32_SEL].ssd_limit = code32_limit; 98 99 /* setup 16bit code segment */ 100 gdt_segs[GAPMCODE16_SEL].ssd_base = code16_base; 101 gdt_segs[GAPMCODE16_SEL].ssd_limit = code16_limit; 102 103 /* setup data segment */ 104 gdt_segs[GAPMDATA_SEL ].ssd_base = data_base; 105 gdt_segs[GAPMDATA_SEL ].ssd_limit = data_limit; 106 107 /* reflect these changes on physical GDT */ 108 ssdtosd(gdt_segs + GAPMCODE32_SEL, &gdt[GAPMCODE32_SEL].sd); 109 ssdtosd(gdt_segs + GAPMCODE16_SEL, &gdt[GAPMCODE16_SEL].sd); 110 ssdtosd(gdt_segs + GAPMDATA_SEL , &gdt[GAPMDATA_SEL ].sd); 111} 112 113/* 48bit far pointer. Do not staticize - used from apm_setup.s */ 114struct addr48 { 115 u_long offset; 116 u_short segment; 117} apm_addr; 118 119static int apm_errno; 120 121static int 122apm_int(u_long *eax, u_long *ebx, u_long *ecx, u_long *edx) 123{ 124 struct apm_bios_arg apa; 125 int cf; 126 127 apa.eax = *eax; 128 apa.ebx = *ebx; 129 apa.ecx = *ecx; 130 apa.edx = *edx; 131 cf = apm_bios_call(&apa); 132 *eax = apa.eax; 133 *ebx = apa.ebx; 134 *ecx = apa.ecx; 135 *edx = apa.edx; 136 apm_errno = ((*eax) >> 8) & 0xff; 137 return cf; 138} 139 140 141/* enable/disable power management */ 142static int 143apm_enable_disable_pm(int enable) 144{ 145 struct apm_softc *sc = &apm_softc; 146 147 u_long eax, ebx, ecx, edx; 148 149 eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM; 150 151 if (sc->intversion >= INTVERSION(1, 1)) 152 ebx = PMDV_ALLDEV; 153 else 154 ebx = 0xffff; /* APM version 1.0 only */ 155 ecx = enable; 156 edx = 0; 157 return apm_int(&eax, &ebx, &ecx, &edx); 158} 159 160static void 161apm_driver_version(int version) 162{ 163 u_long eax, ebx, ecx, edx; 164 165 /* First try APM 1.2 */ 166 eax = (APM_BIOS << 8) | APM_DRVVERSION; 167 ebx = 0x0; 168 ecx = version; 169 edx = 0; 170 if(!apm_int(&eax, &ebx, &ecx, &edx)) 171 apm_version = eax & 0xffff; 172} 173 174/* engage/disengage power management (APM 1.1 or later) */ 175static int 176apm_engage_disengage_pm(int engage) 177{ 178 u_long eax, ebx, ecx, edx; 179 180 eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM; 181 ebx = PMDV_ALLDEV; 182 ecx = engage; 183 edx = 0; 184 return(apm_int(&eax, &ebx, &ecx, &edx)); 185} 186 187/* get PM event */ 188static u_int 189apm_getevent(void) 190{ 191 u_long eax, ebx, ecx, edx; 192 193 eax = (APM_BIOS << 8) | APM_GETPMEVENT; 194 195 ebx = 0; 196 ecx = 0; 197 edx = 0; 198 if (apm_int(&eax, &ebx, &ecx, &edx)) 199 return PMEV_NOEVENT; 200 201 return ebx & 0xffff; 202} 203 204/* suspend entire system */ 205static int 206apm_suspend_system(int state) 207{ 208 u_long eax, ebx, ecx, edx; 209 210 eax = (APM_BIOS << 8) | APM_SETPWSTATE; 211 ebx = PMDV_ALLDEV; 212 ecx = state; 213 edx = 0; 214 215 if (apm_int(&eax, &ebx, &ecx, &edx)) { 216 printf("Entire system suspend failure: errcode = %ld\n", 217 0xff & (eax >> 8)); 218 return 1; 219 } 220 return 0; 221} 222 223/* Display control */ 224/* 225 * Experimental implementation: My laptop machine can't handle this function 226 * If your laptop can control the display via APM, please inform me. 227 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 228 */ 229static int 230apm_display(int newstate) 231{ 232 u_long eax, ebx, ecx, edx; 233 234 eax = (APM_BIOS << 8) | APM_SETPWSTATE; 235 ebx = PMDV_DISP0; 236 ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 237 edx = 0; 238 if (apm_int(&eax, &ebx, &ecx, &edx)) { 239 printf("Display off failure: errcode = %ld\n", 240 0xff & (eax >> 8)); 241 return 1; 242 } 243 return 0; 244} 245 246/* 247 * Turn off the entire system. 248 */ 249static void 250apm_power_off(int howto, void *junk) 251{ 252 u_long eax, ebx, ecx, edx; 253 254 /* Not halting, or not active */ 255 if (!(howto & RB_HALT) || !apm_softc.active) 256 return; 257 eax = (APM_BIOS << 8) | APM_SETPWSTATE; 258 ebx = PMDV_ALLDEV; 259 ecx = PMST_OFF; 260 edx = 0; 261 apm_int(&eax, &ebx, &ecx, &edx); 262} 263 264/* APM Battery low handler */ 265static void 266apm_battery_low(void) 267{ 268 printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 269} 270 271/* APM hook manager */ 272static struct apmhook * 273apm_add_hook(struct apmhook **list, struct apmhook *ah) 274{ 275 int s; 276 struct apmhook *p, *prev; 277 278#ifdef APM_DEBUG 279 printf("Add hook \"%s\"\n", ah->ah_name); 280#endif 281 282 s = splhigh(); 283 if (ah == NULL) 284 panic("illegal apm_hook!"); 285 prev = NULL; 286 for (p = *list; p != NULL; prev = p, p = p->ah_next) 287 if (p->ah_order > ah->ah_order) 288 break; 289 290 if (prev == NULL) { 291 ah->ah_next = *list; 292 *list = ah; 293 } else { 294 ah->ah_next = prev->ah_next; 295 prev->ah_next = ah; 296 } 297 splx(s); 298 return ah; 299} 300 301static void 302apm_del_hook(struct apmhook **list, struct apmhook *ah) 303{ 304 int s; 305 struct apmhook *p, *prev; 306 307 s = splhigh(); 308 prev = NULL; 309 for (p = *list; p != NULL; prev = p, p = p->ah_next) 310 if (p == ah) 311 goto deleteit; 312 panic("Tried to delete unregistered apm_hook."); 313 goto nosuchnode; 314deleteit: 315 if (prev != NULL) 316 prev->ah_next = p->ah_next; 317 else 318 *list = p->ah_next; 319nosuchnode: 320 splx(s); 321} 322 323 324/* APM driver calls some functions automatically */ 325static void 326apm_execute_hook(struct apmhook *list) 327{ 328 struct apmhook *p; 329 330 for (p = list; p != NULL; p = p->ah_next) { 331#ifdef APM_DEBUG 332 printf("Execute APM hook \"%s.\"\n", p->ah_name); 333#endif 334 if ((*(p->ah_fun))(p->ah_arg)) 335 printf("Warning: APM hook \"%s\" failed", p->ah_name); 336 } 337} 338 339 340/* establish an apm hook */ 341struct apmhook * 342apm_hook_establish(int apmh, struct apmhook *ah) 343{ 344 if (apmh < 0 || apmh >= NAPM_HOOK) 345 return NULL; 346 347 return apm_add_hook(&hook[apmh], ah); 348} 349 350/* disestablish an apm hook */ 351void 352apm_hook_disestablish(int apmh, struct apmhook *ah) 353{ 354 if (apmh < 0 || apmh >= NAPM_HOOK) 355 return; 356 357 apm_del_hook(&hook[apmh], ah); 358} 359 360 361static struct timeval suspend_time; 362static struct timeval diff_time; 363 364static int 365apm_default_resume(void *arg) 366{ 367 int pl; 368 u_int second, minute, hour; 369 struct timeval resume_time, tmp_time; 370 371 /* modified for adjkerntz */ 372 pl = splsoftclock(); 373 inittodr(0); /* adjust time to RTC */ 374 microtime(&resume_time); 375 getmicrotime(&tmp_time); 376 timevaladd(&tmp_time, &diff_time); 377 378#ifdef FIXME 379 /* XXX THIS DOESN'T WORK!!! */ 380 time = tmp_time; 381#endif 382 383#ifdef APM_FIXUP_CALLTODO 384 /* Calculate the delta time suspended */ 385 timevalsub(&resume_time, &suspend_time); 386 /* Fixup the calltodo list with the delta time. */ 387 adjust_timeout_calltodo(&resume_time); 388#endif /* APM_FIXUP_CALLTODOK */ 389 splx(pl); 390#ifndef APM_FIXUP_CALLTODO 391 second = resume_time.tv_sec - suspend_time.tv_sec; 392#else /* APM_FIXUP_CALLTODO */ 393 /* 394 * We've already calculated resume_time to be the delta between 395 * the suspend and the resume. 396 */ 397 second = resume_time.tv_sec; 398#endif /* APM_FIXUP_CALLTODO */ 399 hour = second / 3600; 400 second %= 3600; 401 minute = second / 60; 402 second %= 60; 403 log(LOG_NOTICE, "resumed from suspended mode (slept %02d:%02d:%02d)\n", 404 hour, minute, second); 405 return 0; 406} 407 408static int 409apm_default_suspend(void *arg) 410{ 411 int pl; 412 413 pl = splsoftclock(); 414 microtime(&diff_time); 415 inittodr(0); 416 microtime(&suspend_time); 417 timevalsub(&diff_time, &suspend_time); 418 splx(pl); 419 return 0; 420} 421 422static void apm_processevent(void); 423 424/* 425 * Public interface to the suspend/resume: 426 * 427 * Execute suspend and resume hook before and after sleep, respectively. 428 * 429 */ 430 431void 432apm_suspend(int state) 433{ 434 struct apm_softc *sc = &apm_softc; 435 436 if (!sc) 437 return; 438 439 if (sc->initialized) { 440 apm_execute_hook(hook[APM_HOOK_SUSPEND]); 441 if (apm_suspend_system(state) == 0) 442 apm_processevent(); 443 else 444 /* Failure, 'resume' the system again */ 445 apm_execute_hook(hook[APM_HOOK_RESUME]); 446 } 447} 448 449void 450apm_resume(void) 451{ 452 struct apm_softc *sc = &apm_softc; 453 454 if (!sc) 455 return; 456 457 if (sc->initialized) 458 apm_execute_hook(hook[APM_HOOK_RESUME]); 459} 460 461 462/* get APM information */ 463static int 464apm_get_info(apm_info_t aip) 465{ 466 struct apm_softc *sc = &apm_softc; 467 u_long eax, ebx, ecx, edx; 468 469 eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 470 ebx = PMDV_ALLDEV; 471 ecx = 0; 472 edx = 0xffff; /* default to unknown battery time */ 473 474 if (apm_int(&eax, &ebx, &ecx, &edx)) 475 return 1; 476 477 aip->ai_infoversion = 1; 478 aip->ai_acline = (ebx >> 8) & 0xff; 479 aip->ai_batt_stat = ebx & 0xff; 480 aip->ai_batt_life = ecx & 0xff; 481 aip->ai_major = (u_int)sc->majorversion; 482 aip->ai_minor = (u_int)sc->minorversion; 483 aip->ai_status = (u_int)sc->active; 484 edx &= 0xffff; 485 if (edx == 0xffff) /* Time is unknown */ 486 aip->ai_batt_time = -1; 487 else if (edx & 0x8000) /* Time is in minutes */ 488 aip->ai_batt_time = (edx & 0x7fff) * 60; 489 else /* Time is in seconds */ 490 aip->ai_batt_time = edx; 491 492 eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 493 ebx = 0; 494 ecx = 0; 495 edx = 0; 496 if (apm_int(&eax, &ebx, &ecx, &edx)) { 497 aip->ai_batteries = -1; /* Unknown */ 498 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 499 } else { 500 aip->ai_batteries = ebx & 0xff; 501 aip->ai_capabilities = ecx & 0xf; 502 } 503 504 bzero(aip->ai_spare, sizeof aip->ai_spare); 505 506 return 0; 507} 508 509 510/* inform APM BIOS that CPU is idle */ 511void 512apm_cpu_idle(void) 513{ 514 struct apm_softc *sc = &apm_softc; 515 516 if (sc->active) { 517 u_long eax, ebx, ecx, edx; 518 519 eax = (APM_BIOS <<8) | APM_CPUIDLE; 520 edx = ecx = ebx = 0; 521 apm_int(&eax, &ebx, &ecx, &edx); 522 } 523 /* 524 * Some APM implementation halts CPU in BIOS, whenever 525 * "CPU-idle" function are invoked, but swtch() of 526 * FreeBSD halts CPU, therefore, CPU is halted twice 527 * in the sched loop. It makes the interrupt latency 528 * terribly long and be able to cause a serious problem 529 * in interrupt processing. We prevent it by removing 530 * "hlt" operation from swtch() and managed it under 531 * APM driver. 532 */ 533 if (!sc->active || sc->always_halt_cpu) 534 __asm("hlt"); /* wait for interrupt */ 535} 536 537/* inform APM BIOS that CPU is busy */ 538void 539apm_cpu_busy(void) 540{ 541 struct apm_softc *sc = &apm_softc; 542 543 /* 544 * The APM specification says this is only necessary if your BIOS 545 * slows down the processor in the idle task, otherwise it's not 546 * necessary. 547 */ 548 if (sc->slow_idle_cpu && sc->active) { 549 u_long eax, ebx, ecx, edx; 550 551 eax = (APM_BIOS <<8) | APM_CPUBUSY; 552 edx = ecx = ebx = 0; 553 apm_int(&eax, &ebx, &ecx, &edx); 554 } 555} 556 557 558/* 559 * APM timeout routine: 560 * 561 * This routine is automatically called by timer once per second. 562 */ 563 564static void 565apm_timeout(void *dummy) 566{ 567 struct apm_softc *sc = &apm_softc; 568 569 apm_processevent(); 570 if (sc->active == 1) 571 /* Run slightly more oftan than 1 Hz */ 572 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1 ); 573} 574 575/* enable APM BIOS */ 576static void 577apm_event_enable(void) 578{ 579 struct apm_softc *sc = &apm_softc; 580 581#ifdef APM_DEBUG 582 printf("called apm_event_enable()\n"); 583#endif 584 if (sc->initialized) { 585 sc->active = 1; 586 apm_timeout(sc); 587 } 588} 589 590/* disable APM BIOS */ 591static void 592apm_event_disable(void) 593{ 594 struct apm_softc *sc = &apm_softc; 595 596#ifdef APM_DEBUG 597 printf("called apm_event_disable()\n"); 598#endif 599 if (sc->initialized) { 600 untimeout(apm_timeout, NULL, apm_timeout_ch); 601 sc->active = 0; 602 } 603} 604 605/* halt CPU in scheduling loop */ 606static void 607apm_halt_cpu(void) 608{ 609 struct apm_softc *sc = &apm_softc; 610 611 if (sc->initialized) 612 sc->always_halt_cpu = 1; 613} 614 615/* don't halt CPU in scheduling loop */ 616static void 617apm_not_halt_cpu(void) 618{ 619 struct apm_softc *sc = &apm_softc; 620 621 if (sc->initialized) 622 sc->always_halt_cpu = 0; 623} 624 625/* device driver definitions */ 626static int apmprobe (struct isa_device *); 627static int apmattach(struct isa_device *); 628struct isa_driver apmdriver = { apmprobe, apmattach, "apm" }; 629 630/* 631 * probe APM (dummy): 632 * 633 * APM probing routine is placed on locore.s and apm_init.S because 634 * this process forces the CPU to turn to real mode or V86 mode. 635 * Current version uses real mode, but in a future version, we want 636 * to use V86 mode in APM initialization. 637 * 638 * XXX If VM86 is defined, we do. 639 */ 640 641static int 642apmprobe(struct isa_device *dvp) 643{ 644#ifdef VM86 645 struct vm86frame vmf; 646 int i; 647#endif 648 649 if ( dvp->id_unit > 0 ) { 650 printf("apm: Only one APM driver supported.\n"); 651 return 0; 652 } 653 654#ifdef VM86 655 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 656 vmf.vmf_ax = (APM_BIOS << 8) | APM_INSTCHECK; 657 vmf.vmf_bx = 0; 658 if (((i = vm86_intcall(SYSTEM_BIOS, &vmf)) == 0) && 659 !(vmf.vmf_eflags & PSL_C) && 660 (vmf.vmf_bx == 0x504d)) { 661 662 apm_version = vmf.vmf_ax; 663 apm_flags = vmf.vmf_cx; 664 665 vmf.vmf_ax = (APM_BIOS << 8) | APM_PROT32CONNECT; 666 vmf.vmf_bx = 0; 667 if (((i = vm86_intcall(SYSTEM_BIOS, &vmf)) == 0) && 668 !(vmf.vmf_eflags & PSL_C)) { 669 670 apm_cs32_base = vmf.vmf_ax; 671 apm_cs_entry = vmf.vmf_ebx; 672 apm_cs16_base = vmf.vmf_cx; 673 apm_ds_base = vmf.vmf_dx; 674 apm_cs32_limit = vmf.vmf_si; 675 if (apm_version >= 0x0102) 676 apm_cs16_limit = (vmf.esi.r_ex >> 16); 677 apm_ds_limit = vmf.vmf_di; 678#ifdef APM_DEBUG 679 printf("apm: BIOS probe/32-bit connect successful\n"); 680#endif 681 } else { 682 /* XXX constant typo! */ 683 if (vmf.vmf_ah == APME_PROT32NOTDUPPORTED) { 684 apm_version = APMINI_NOT32BIT; 685 } else { 686 apm_version = APMINI_CONNECTERR; 687 } 688#ifdef APM_DEBUG 689 printf("apm: BIOS 32-bit connect failed: error 0x%x carry %d ah 0x%x\n", 690 i, (vmf.vmf_eflags & PSL_C) ? 1 : 0, vmf.vmf_ah); 691#endif 692 } 693 } else { 694 apm_version = APMINI_CANTFIND; 695#ifdef APM_DEBUG 696 printf("apm: BIOS probe failed: error 0x%x carry %d bx 0x%x\n", 697 i, (vmf.vmf_eflags & PSL_C) ? 1 : 0, vmf.vmf_bx); 698#endif 699 } 700#endif 701 702 bzero(&apm_softc, sizeof(apm_softc)); 703 704 switch (apm_version) { 705 case APMINI_CANTFIND: 706 /* silent */ 707 return 0; 708 case APMINI_NOT32BIT: 709 printf("apm: 32bit connection is not supported.\n"); 710 return 0; 711 case APMINI_CONNECTERR: 712 printf("apm: 32-bit connection error.\n"); 713 return 0; 714 } 715 if (dvp->id_flags & 0x20) 716 statclock_disable = 1; 717 return -1; 718} 719 720 721/* Process APM event */ 722static void 723apm_processevent(void) 724{ 725 int apm_event; 726 727#ifdef APM_DEBUG 728# define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 729 printf("Received APM Event: " #symbol "\n"); 730#else 731# define OPMEV_DEBUGMESSAGE(symbol) case symbol: 732#endif 733 do { 734 apm_event = apm_getevent(); 735 switch (apm_event) { 736 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 737 apm_suspend(PMST_STANDBY); 738 break; 739 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 740 apm_suspend(PMST_SUSPEND); 741 break; 742 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 743 apm_suspend(PMST_SUSPEND); 744 break; 745 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 746 apm_suspend(PMST_SUSPEND); 747 break; 748 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 749 apm_resume(); 750 break; 751 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 752 apm_resume(); 753 break; 754 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 755 apm_resume(); 756 break; 757 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 758 apm_battery_low(); 759 apm_suspend(PMST_SUSPEND); 760 break; 761 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 762 break; 763 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 764 inittodr(0); /* adjust time to RTC */ 765 break; 766 case PMEV_NOEVENT: 767 break; 768 default: 769 printf("Unknown Original APM Event 0x%x\n", apm_event); 770 break; 771 } 772 } while (apm_event != PMEV_NOEVENT); 773} 774 775/* 776 * Attach APM: 777 * 778 * Initialize APM driver (APM BIOS itself has been initialized in locore.s) 779 */ 780 781static int 782apmattach(struct isa_device *dvp) 783{ 784#define APM_KERNBASE KERNBASE 785 struct apm_softc *sc = &apm_softc; 786 787 sc->initialized = 0; 788 789 /* Must be externally enabled */ 790 sc->active = 0; 791 792 /* setup APM parameters */ 793 sc->cs16_base = (apm_cs16_base << 4) + APM_KERNBASE; 794 sc->cs32_base = (apm_cs32_base << 4) + APM_KERNBASE; 795 sc->ds_base = (apm_ds_base << 4) + APM_KERNBASE; 796 sc->cs32_limit = apm_cs32_limit - 1; 797 if (apm_cs16_limit == 0) 798 apm_cs16_limit == apm_cs32_limit; 799 sc->cs16_limit = apm_cs16_limit - 1; 800 sc->ds_limit = apm_ds_limit - 1; 801 sc->cs_entry = apm_cs_entry; 802 803 /* Always call HLT in idle loop */ 804 sc->always_halt_cpu = 1; 805 806 sc->slow_idle_cpu = ((apm_flags & APM_CPUIDLE_SLOW) != 0); 807 sc->disabled = ((apm_flags & APM_DISABLED) != 0); 808 sc->disengaged = ((apm_flags & APM_DISENGAGED) != 0); 809 810 /* print bootstrap messages */ 811#ifdef APM_DEBUG 812 printf("apm: APM BIOS version %04x\n", apm_version); 813 printf("apm: Code32 0x%08x, Code16 0x%08x, Data 0x%08x\n", 814 sc->cs32_base, sc->cs16_base, sc->ds_base); 815 printf("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 816 sc->cs_entry, is_enabled(sc->slow_idle_cpu), 817 is_enabled(!sc->disabled)); 818 printf("apm: CS32_limit=0x%x, CS16_limit=0x%x, DS_limit=0x%x\n", 819 (u_short)sc->cs32_limit, (u_short)sc->cs16_limit, (u_short)sc->ds_limit); 820#endif /* APM_DEBUG */ 821 822#if 0 823 /* Workaround for some buggy APM BIOS implementations */ 824 sc->cs_limit = 0xffff; 825 sc->ds_limit = 0xffff; 826#endif 827 828 /* setup GDT */ 829 setup_apm_gdt(sc->cs32_base, sc->cs16_base, sc->ds_base, 830 sc->cs32_limit, sc->cs16_limit, sc->ds_limit); 831 832 /* setup entry point 48bit pointer */ 833 apm_addr.segment = GSEL(GAPMCODE32_SEL, SEL_KPL); 834 apm_addr.offset = sc->cs_entry; 835 836 if ((dvp->id_flags & 0x10)) { 837 if ((dvp->id_flags & 0xf) >= 0x2) { 838 apm_driver_version(0x102); 839 } 840 if (!apm_version && (dvp->id_flags & 0xf) >= 0x1) { 841 apm_driver_version(0x101); 842 } 843 } else { 844 apm_driver_version(0x102); 845 if (!apm_version) 846 apm_driver_version(0x101); 847 } 848 if (!apm_version) 849 apm_version = 0x100; 850 851 sc->minorversion = ((apm_version & 0x00f0) >> 4) * 10 + 852 ((apm_version & 0x000f) >> 0); 853 sc->majorversion = ((apm_version & 0xf000) >> 12) * 10 + 854 ((apm_version & 0x0f00) >> 8); 855 856 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 857 858#ifdef APM_DEBUG 859 if (sc->intversion >= INTVERSION(1, 1)) 860 printf("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 861#endif 862 863 printf("apm: found APM BIOS version %d.%d\n", 864 sc->majorversion, sc->minorversion); 865 866#ifdef APM_DEBUG 867 printf("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 868#endif 869 870 /* enable power management */ 871 if (sc->disabled) { 872 if (apm_enable_disable_pm(1)) { 873#ifdef APM_DEBUG 874 printf("apm: *Warning* enable function failed! [%x]\n", 875 apm_errno); 876#endif 877 } 878 } 879 880 /* engage power managment (APM 1.1 or later) */ 881 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 882 if (apm_engage_disengage_pm(1)) { 883#ifdef APM_DEBUG 884 printf("apm: *Warning* engage function failed err=[%x]", 885 apm_errno); 886 printf(" (Docked or using external power?).\n"); 887#endif 888 } 889 } 890 891 /* default suspend hook */ 892 sc->sc_suspend.ah_fun = apm_default_suspend; 893 sc->sc_suspend.ah_arg = sc; 894 sc->sc_suspend.ah_name = "default suspend"; 895 sc->sc_suspend.ah_order = APM_MAX_ORDER; 896 897 /* default resume hook */ 898 sc->sc_resume.ah_fun = apm_default_resume; 899 sc->sc_resume.ah_arg = sc; 900 sc->sc_resume.ah_name = "default resume"; 901 sc->sc_resume.ah_order = APM_MIN_ORDER; 902 903 apm_hook_establish(APM_HOOK_SUSPEND, &sc->sc_suspend); 904 apm_hook_establish(APM_HOOK_RESUME , &sc->sc_resume); 905 906 apm_event_enable(); 907 908 /* Power the system off using APM */ 909 at_shutdown_pri(apm_power_off, NULL, SHUTDOWN_FINAL, SHUTDOWN_PRI_LAST); 910 911 sc->initialized = 1; 912 913#ifdef DEVFS 914 sc->sc_devfs_token = 915 devfs_add_devswf(&apm_cdevsw, 0, DV_CHR, 0, 0, 0600, "apm"); 916#endif 917 return 0; 918} 919 920static int 921apmopen(dev_t dev, int flag, int fmt, struct proc *p) 922{ 923 struct apm_softc *sc = &apm_softc; 924 925 if (minor(dev) != 0 || !sc->initialized) 926 return (ENXIO); 927 928 return 0; 929} 930 931static int 932apmclose(dev_t dev, int flag, int fmt, struct proc *p) 933{ 934 return 0; 935} 936 937static int 938apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 939{ 940 struct apm_softc *sc = &apm_softc; 941 int error = 0; 942 int newstate; 943 944 if (minor(dev) != 0 || !sc->initialized) 945 return (ENXIO); 946#ifdef APM_DEBUG 947 printf("APM ioctl: cmd = 0x%x\n", cmd); 948#endif 949 switch (cmd) { 950 case APMIO_SUSPEND: 951 if (sc->active) 952 apm_suspend(PMST_SUSPEND); 953 else 954 error = EINVAL; 955 break; 956 957 case APMIO_STANDBY: 958 if (sc->active) 959 apm_suspend(PMST_STANDBY); 960 else 961 error = EINVAL; 962 break; 963 964 case APMIO_GETINFO_OLD: 965 { 966 struct apm_info info; 967 apm_info_old_t aiop; 968 969 if (apm_get_info(&info)) 970 error = ENXIO; 971 aiop = (apm_info_old_t)addr; 972 aiop->ai_major = info.ai_major; 973 aiop->ai_minor = info.ai_minor; 974 aiop->ai_acline = info.ai_acline; 975 aiop->ai_batt_stat = info.ai_batt_stat; 976 aiop->ai_batt_life = info.ai_batt_life; 977 aiop->ai_status = info.ai_status; 978 } 979 break; 980 case APMIO_GETINFO: 981 if (apm_get_info((apm_info_t)addr)) 982 error = ENXIO; 983 break; 984 case APMIO_ENABLE: 985 apm_event_enable(); 986 break; 987 case APMIO_DISABLE: 988 apm_event_disable(); 989 break; 990 case APMIO_HALTCPU: 991 apm_halt_cpu(); 992 break; 993 case APMIO_NOTHALTCPU: 994 apm_not_halt_cpu(); 995 break; 996 case APMIO_DISPLAY: 997 newstate = *(int *)addr; 998 if (apm_display(newstate)) 999 error = ENXIO; 1000 break; 1001 case APMIO_BIOS: 1002 if (apm_bios_call((struct apm_bios_arg*)addr) == 0) 1003 ((struct apm_bios_arg*)addr)->eax &= 0xff; 1004 break; 1005 default: 1006 error = EINVAL; 1007 break; 1008 } 1009 return error; 1010} 1011 1012 1013static apm_devsw_installed = 0; 1014 1015static void 1016apm_drvinit(void *unused) 1017{ 1018 dev_t dev; 1019 1020 if( ! apm_devsw_installed ) { 1021 dev = makedev(CDEV_MAJOR,0); 1022 cdevsw_add(&dev,&apm_cdevsw,NULL); 1023 apm_devsw_installed = 1; 1024 } 1025} 1026 1027SYSINIT(apmdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,apm_drvinit,NULL) 1028