apm.c revision 48984
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 1.90 1999/07/10 18:08:48 iwasaki Exp $ 19 */ 20 21#include "opt_devfs.h" 22#include "opt_smp.h" 23 24#include <sys/param.h> 25#include <sys/systm.h> 26#include <sys/conf.h> 27#include <sys/kernel.h> 28#ifdef DEVFS 29#include <sys/devfsext.h> 30#endif /*DEVFS*/ 31#include <sys/time.h> 32#include <sys/reboot.h> 33#include <sys/bus.h> 34#include <sys/select.h> 35#include <sys/poll.h> 36#include <sys/fcntl.h> 37#include <sys/proc.h> 38#include <sys/uio.h> 39#include <sys/signalvar.h> 40#include <machine/apm_bios.h> 41#include <machine/segments.h> 42#include <machine/clock.h> 43#include <vm/vm.h> 44#include <vm/vm_param.h> 45#include <vm/pmap.h> 46#include <sys/syslog.h> 47#include <i386/apm/apm_setup.h> 48 49#include <machine/psl.h> 50#include <machine/vm86.h> 51 52#ifdef SMP 53#include <machine/smp.h> 54#endif 55 56static int apm_display __P((int newstate)); 57static int apm_int __P((u_long *eax, u_long *ebx, u_long *ecx, u_long *edx)); 58static void apm_resume __P((void)); 59 60#define APM_NEVENTS 16 61#define APM_NPMEV 13 62 63int apm_evindex; 64 65/* static data */ 66struct apm_softc { 67 int initialized, active; 68 int always_halt_cpu, slow_idle_cpu; 69 int disabled, disengaged; 70 u_int minorversion, majorversion; 71 u_int cs32_base, cs16_base, ds_base; 72 u_int cs16_limit, cs32_limit, ds_limit; 73 u_int cs_entry; 74 u_int intversion; 75 struct apmhook sc_suspend; 76 struct apmhook sc_resume; 77 struct selinfo sc_rsel; 78 int sc_flags; 79 int event_count; 80 int event_ptr; 81 struct apm_event_info event_list[APM_NEVENTS]; 82 u_char event_filter[APM_NPMEV]; 83#ifdef DEVFS 84 void *sc_devfs_token; 85#endif 86}; 87#define SCFLAG_ONORMAL 0x0000001 88#define SCFLAG_OCTL 0x0000002 89#define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL) 90 91#define APMDEV(dev) (minor(dev)&0x0f) 92#define APMDEV_NORMAL 0 93#define APMDEV_CTL 8 94 95static struct apm_softc apm_softc; 96static struct apmhook *hook[NAPM_HOOK]; /* XXX */ 97 98#define is_enabled(foo) ((foo) ? "enabled" : "disabled") 99 100/* Map version number to integer (keeps ordering of version numbers) */ 101#define INTVERSION(major, minor) ((major)*100 + (minor)) 102 103static struct callout_handle apm_timeout_ch = 104 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch); 105 106static timeout_t apm_timeout; 107static d_open_t apmopen; 108static d_close_t apmclose; 109static d_write_t apmwrite; 110static d_ioctl_t apmioctl; 111static d_poll_t apmpoll; 112 113#define CDEV_MAJOR 39 114static struct cdevsw apm_cdevsw = { 115 /* open */ apmopen, 116 /* close */ apmclose, 117 /* read */ noread, 118 /* write */ apmwrite, 119 /* ioctl */ apmioctl, 120 /* stop */ nostop, 121 /* reset */ noreset, 122 /* devtotty */ nodevtotty, 123 /* poll */ apmpoll, 124 /* mmap */ nommap, 125 /* strategy */ nostrategy, 126 /* name */ "apm", 127 /* parms */ noparms, 128 /* maj */ CDEV_MAJOR, 129 /* dump */ nodump, 130 /* psize */ nopsize, 131 /* flags */ 0, 132 /* maxio */ 0, 133 /* bmaj */ -1 134}; 135 136/* setup APM GDT discriptors */ 137static void 138setup_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) 139{ 140#ifdef SMP 141 int x; 142#endif 143 144 /* setup 32bit code segment */ 145 gdt_segs[GAPMCODE32_SEL].ssd_base = code32_base; 146 gdt_segs[GAPMCODE32_SEL].ssd_limit = code32_limit; 147 148 /* setup 16bit code segment */ 149 gdt_segs[GAPMCODE16_SEL].ssd_base = code16_base; 150 gdt_segs[GAPMCODE16_SEL].ssd_limit = code16_limit; 151 152 /* setup data segment */ 153 gdt_segs[GAPMDATA_SEL ].ssd_base = data_base; 154 gdt_segs[GAPMDATA_SEL ].ssd_limit = data_limit; 155 156 /* reflect these changes on physical GDT */ 157 ssdtosd(gdt_segs + GAPMCODE32_SEL, &gdt[GAPMCODE32_SEL].sd); 158 ssdtosd(gdt_segs + GAPMCODE16_SEL, &gdt[GAPMCODE16_SEL].sd); 159 ssdtosd(gdt_segs + GAPMDATA_SEL , &gdt[GAPMDATA_SEL ].sd); 160 161#ifdef SMP 162 for (x = 1; x < NCPU; x++) { 163 gdt[x * NGDT + GAPMCODE32_SEL].sd = gdt[GAPMCODE32_SEL].sd; 164 gdt[x * NGDT + GAPMCODE16_SEL].sd = gdt[GAPMCODE16_SEL].sd; 165 gdt[x * NGDT + GAPMDATA_SEL ].sd = gdt[GAPMDATA_SEL ].sd; 166 } 167#endif 168} 169 170/* 48bit far pointer. Do not staticize - used from apm_setup.s */ 171struct addr48 { 172 u_long offset; 173 u_short segment; 174} apm_addr; 175 176static int apm_errno; 177 178static int 179apm_int(u_long *eax, u_long *ebx, u_long *ecx, u_long *edx) 180{ 181 struct apm_bios_arg apa; 182 int cf; 183 184 apa.eax = *eax; 185 apa.ebx = *ebx; 186 apa.ecx = *ecx; 187 apa.edx = *edx; 188 cf = apm_bios_call(&apa); 189 *eax = apa.eax; 190 *ebx = apa.ebx; 191 *ecx = apa.ecx; 192 *edx = apa.edx; 193 apm_errno = ((*eax) >> 8) & 0xff; 194 return cf; 195} 196 197 198/* enable/disable power management */ 199static int 200apm_enable_disable_pm(int enable) 201{ 202 struct apm_softc *sc = &apm_softc; 203 204 u_long eax, ebx, ecx, edx; 205 206 eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM; 207 208 if (sc->intversion >= INTVERSION(1, 1)) 209 ebx = PMDV_ALLDEV; 210 else 211 ebx = 0xffff; /* APM version 1.0 only */ 212 ecx = enable; 213 edx = 0; 214 return apm_int(&eax, &ebx, &ecx, &edx); 215} 216 217static void 218apm_driver_version(int version) 219{ 220 u_long eax, ebx, ecx, edx; 221 222 /* First try APM 1.2 */ 223 eax = (APM_BIOS << 8) | APM_DRVVERSION; 224 ebx = 0x0; 225 ecx = version; 226 edx = 0; 227 if(!apm_int(&eax, &ebx, &ecx, &edx)) 228 apm_version = eax & 0xffff; 229} 230 231/* engage/disengage power management (APM 1.1 or later) */ 232static int 233apm_engage_disengage_pm(int engage) 234{ 235 u_long eax, ebx, ecx, edx; 236 237 eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM; 238 ebx = PMDV_ALLDEV; 239 ecx = engage; 240 edx = 0; 241 return(apm_int(&eax, &ebx, &ecx, &edx)); 242} 243 244/* get PM event */ 245static u_int 246apm_getevent(void) 247{ 248 u_long eax, ebx, ecx, edx; 249 250 eax = (APM_BIOS << 8) | APM_GETPMEVENT; 251 252 ebx = 0; 253 ecx = 0; 254 edx = 0; 255 if (apm_int(&eax, &ebx, &ecx, &edx)) 256 return PMEV_NOEVENT; 257 258 return ebx & 0xffff; 259} 260 261/* suspend entire system */ 262static int 263apm_suspend_system(int state) 264{ 265 u_long eax, ebx, ecx, edx; 266 267 eax = (APM_BIOS << 8) | APM_SETPWSTATE; 268 ebx = PMDV_ALLDEV; 269 ecx = state; 270 edx = 0; 271 272 if (apm_int(&eax, &ebx, &ecx, &edx)) { 273 printf("Entire system suspend failure: errcode = %ld\n", 274 0xff & (eax >> 8)); 275 return 1; 276 } 277 return 0; 278} 279 280/* Display control */ 281/* 282 * Experimental implementation: My laptop machine can't handle this function 283 * If your laptop can control the display via APM, please inform me. 284 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 285 */ 286static int 287apm_display(int newstate) 288{ 289 u_long eax, ebx, ecx, edx; 290 291 eax = (APM_BIOS << 8) | APM_SETPWSTATE; 292 ebx = PMDV_DISP0; 293 ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 294 edx = 0; 295 if (apm_int(&eax, &ebx, &ecx, &edx)) { 296 printf("Display off failure: errcode = %ld\n", 297 0xff & (eax >> 8)); 298 return 1; 299 } 300 return 0; 301} 302 303/* 304 * Turn off the entire system. 305 */ 306static void 307apm_power_off(int howto, void *junk) 308{ 309 u_long eax, ebx, ecx, edx; 310 311 /* Not halting powering off, or not active */ 312 if (!(howto & RB_POWEROFF) || !apm_softc.active) 313 return; 314 eax = (APM_BIOS << 8) | APM_SETPWSTATE; 315 ebx = PMDV_ALLDEV; 316 ecx = PMST_OFF; 317 edx = 0; 318 apm_int(&eax, &ebx, &ecx, &edx); 319} 320 321/* APM Battery low handler */ 322static void 323apm_battery_low(void) 324{ 325 printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 326} 327 328/* APM hook manager */ 329static struct apmhook * 330apm_add_hook(struct apmhook **list, struct apmhook *ah) 331{ 332 int s; 333 struct apmhook *p, *prev; 334 335#ifdef APM_DEBUG 336 printf("Add hook \"%s\"\n", ah->ah_name); 337#endif 338 339 s = splhigh(); 340 if (ah == NULL) 341 panic("illegal apm_hook!"); 342 prev = NULL; 343 for (p = *list; p != NULL; prev = p, p = p->ah_next) 344 if (p->ah_order > ah->ah_order) 345 break; 346 347 if (prev == NULL) { 348 ah->ah_next = *list; 349 *list = ah; 350 } else { 351 ah->ah_next = prev->ah_next; 352 prev->ah_next = ah; 353 } 354 splx(s); 355 return ah; 356} 357 358static void 359apm_del_hook(struct apmhook **list, struct apmhook *ah) 360{ 361 int s; 362 struct apmhook *p, *prev; 363 364 s = splhigh(); 365 prev = NULL; 366 for (p = *list; p != NULL; prev = p, p = p->ah_next) 367 if (p == ah) 368 goto deleteit; 369 panic("Tried to delete unregistered apm_hook."); 370 goto nosuchnode; 371deleteit: 372 if (prev != NULL) 373 prev->ah_next = p->ah_next; 374 else 375 *list = p->ah_next; 376nosuchnode: 377 splx(s); 378} 379 380 381/* APM driver calls some functions automatically */ 382static void 383apm_execute_hook(struct apmhook *list) 384{ 385 struct apmhook *p; 386 387 for (p = list; p != NULL; p = p->ah_next) { 388#ifdef APM_DEBUG 389 printf("Execute APM hook \"%s.\"\n", p->ah_name); 390#endif 391 if ((*(p->ah_fun))(p->ah_arg)) 392 printf("Warning: APM hook \"%s\" failed", p->ah_name); 393 } 394} 395 396 397/* establish an apm hook */ 398struct apmhook * 399apm_hook_establish(int apmh, struct apmhook *ah) 400{ 401 if (apmh < 0 || apmh >= NAPM_HOOK) 402 return NULL; 403 404 return apm_add_hook(&hook[apmh], ah); 405} 406 407/* disestablish an apm hook */ 408void 409apm_hook_disestablish(int apmh, struct apmhook *ah) 410{ 411 if (apmh < 0 || apmh >= NAPM_HOOK) 412 return; 413 414 apm_del_hook(&hook[apmh], ah); 415} 416 417 418static struct timeval suspend_time; 419static struct timeval diff_time; 420 421static int 422apm_default_resume(void *arg) 423{ 424 int pl; 425 u_int second, minute, hour; 426 struct timeval resume_time, tmp_time; 427 428 /* modified for adjkerntz */ 429 pl = splsoftclock(); 430 inittodr(0); /* adjust time to RTC */ 431 microtime(&resume_time); 432 getmicrotime(&tmp_time); 433 timevaladd(&tmp_time, &diff_time); 434 435#ifdef FIXME 436 /* XXX THIS DOESN'T WORK!!! */ 437 time = tmp_time; 438#endif 439 440#ifdef APM_FIXUP_CALLTODO 441 /* Calculate the delta time suspended */ 442 timevalsub(&resume_time, &suspend_time); 443 /* Fixup the calltodo list with the delta time. */ 444 adjust_timeout_calltodo(&resume_time); 445#endif /* APM_FIXUP_CALLTODOK */ 446 splx(pl); 447#ifndef APM_FIXUP_CALLTODO 448 second = resume_time.tv_sec - suspend_time.tv_sec; 449#else /* APM_FIXUP_CALLTODO */ 450 /* 451 * We've already calculated resume_time to be the delta between 452 * the suspend and the resume. 453 */ 454 second = resume_time.tv_sec; 455#endif /* APM_FIXUP_CALLTODO */ 456 hour = second / 3600; 457 second %= 3600; 458 minute = second / 60; 459 second %= 60; 460 log(LOG_NOTICE, "resumed from suspended mode (slept %02d:%02d:%02d)\n", 461 hour, minute, second); 462 return 0; 463} 464 465static int 466apm_default_suspend(void *arg) 467{ 468 int pl; 469 470 pl = splsoftclock(); 471 microtime(&diff_time); 472 inittodr(0); 473 microtime(&suspend_time); 474 timevalsub(&diff_time, &suspend_time); 475 splx(pl); 476 return 0; 477} 478 479static int apm_record_event __P((struct apm_softc *, u_int)); 480static void apm_processevent(void); 481 482static u_int apm_op_inprog = 0; 483 484static void 485apm_lastreq_notify(void) 486{ 487 u_long eax, ebx, ecx, edx; 488 489 eax = (APM_BIOS << 8) | APM_SETPWSTATE; 490 ebx = PMDV_ALLDEV; 491 ecx = PMST_LASTREQNOTIFY; 492 edx = 0; 493 494 apm_int(&eax, &ebx, &ecx, &edx); 495} 496 497static int 498apm_lastreq_rejected(void) 499{ 500 u_long eax, ebx, ecx, edx; 501 502 if (apm_op_inprog == 0) { 503 return 1; /* no operation in progress */ 504 } 505 506 eax = (APM_BIOS << 8) | APM_SETPWSTATE; 507 ebx = PMDV_ALLDEV; 508 ecx = PMST_LASTREQREJECT; 509 edx = 0; 510 511 if (apm_int(&eax, &ebx, &ecx, &edx)) { 512#ifdef APM_DEBUG 513 printf("apm_lastreq_rejected: failed\n"); 514#endif 515 return 1; 516 } 517 518 apm_op_inprog = 0; 519 520 return 0; 521} 522 523/* 524 * Public interface to the suspend/resume: 525 * 526 * Execute suspend and resume hook before and after sleep, respectively. 527 * 528 */ 529 530void 531apm_suspend(int state) 532{ 533 struct apm_softc *sc = &apm_softc; 534 int error; 535 536 if (!sc) 537 return; 538 539 apm_op_inprog = 0; 540 541 if (sc->initialized) { 542 error = DEVICE_SUSPEND(root_bus); 543 /* 544 * XXX Shouldn't ignore the error like this, but should 545 * instead fix the newbus code. Until that happens, 546 * I'm doing this to get suspend working again. 547 */ 548 if (error) 549 printf("DEVICE_SUSPEND error %d, ignored\n", error); 550 apm_execute_hook(hook[APM_HOOK_SUSPEND]); 551 if (apm_suspend_system(state) == 0) 552 apm_processevent(); 553 else 554 /* Failure, 'resume' the system again */ 555 apm_execute_hook(hook[APM_HOOK_RESUME]); 556 } 557} 558 559void 560apm_resume(void) 561{ 562 struct apm_softc *sc = &apm_softc; 563 564 if (!sc) 565 return; 566 567 if (sc->initialized) { 568 DEVICE_RESUME(root_bus); 569 apm_execute_hook(hook[APM_HOOK_RESUME]); 570 } 571} 572 573 574/* get APM information */ 575static int 576apm_get_info(apm_info_t aip) 577{ 578 struct apm_softc *sc = &apm_softc; 579 u_long eax, ebx, ecx, edx; 580 581 eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 582 ebx = PMDV_ALLDEV; 583 ecx = 0; 584 edx = 0xffff; /* default to unknown battery time */ 585 586 if (apm_int(&eax, &ebx, &ecx, &edx)) 587 return 1; 588 589 aip->ai_infoversion = 1; 590 aip->ai_acline = (ebx >> 8) & 0xff; 591 aip->ai_batt_stat = ebx & 0xff; 592 aip->ai_batt_life = ecx & 0xff; 593 aip->ai_major = (u_int)sc->majorversion; 594 aip->ai_minor = (u_int)sc->minorversion; 595 aip->ai_status = (u_int)sc->active; 596 edx &= 0xffff; 597 if (edx == 0xffff) /* Time is unknown */ 598 aip->ai_batt_time = -1; 599 else if (edx & 0x8000) /* Time is in minutes */ 600 aip->ai_batt_time = (edx & 0x7fff) * 60; 601 else /* Time is in seconds */ 602 aip->ai_batt_time = edx; 603 604 eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 605 ebx = 0; 606 ecx = 0; 607 edx = 0; 608 if (apm_int(&eax, &ebx, &ecx, &edx)) { 609 aip->ai_batteries = -1; /* Unknown */ 610 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 611 } else { 612 aip->ai_batteries = ebx & 0xff; 613 aip->ai_capabilities = ecx & 0xf; 614 } 615 616 bzero(aip->ai_spare, sizeof aip->ai_spare); 617 618 return 0; 619} 620 621 622/* inform APM BIOS that CPU is idle */ 623void 624apm_cpu_idle(void) 625{ 626 struct apm_softc *sc = &apm_softc; 627 628 if (sc->active) { 629 u_long eax, ebx, ecx, edx; 630 631 eax = (APM_BIOS <<8) | APM_CPUIDLE; 632 edx = ecx = ebx = 0; 633 apm_int(&eax, &ebx, &ecx, &edx); 634 } 635 /* 636 * Some APM implementation halts CPU in BIOS, whenever 637 * "CPU-idle" function are invoked, but swtch() of 638 * FreeBSD halts CPU, therefore, CPU is halted twice 639 * in the sched loop. It makes the interrupt latency 640 * terribly long and be able to cause a serious problem 641 * in interrupt processing. We prevent it by removing 642 * "hlt" operation from swtch() and managed it under 643 * APM driver. 644 */ 645 if (!sc->active || sc->always_halt_cpu) 646 __asm("hlt"); /* wait for interrupt */ 647} 648 649/* inform APM BIOS that CPU is busy */ 650void 651apm_cpu_busy(void) 652{ 653 struct apm_softc *sc = &apm_softc; 654 655 /* 656 * The APM specification says this is only necessary if your BIOS 657 * slows down the processor in the idle task, otherwise it's not 658 * necessary. 659 */ 660 if (sc->slow_idle_cpu && sc->active) { 661 u_long eax, ebx, ecx, edx; 662 663 eax = (APM_BIOS <<8) | APM_CPUBUSY; 664 edx = ecx = ebx = 0; 665 apm_int(&eax, &ebx, &ecx, &edx); 666 } 667} 668 669 670/* 671 * APM timeout routine: 672 * 673 * This routine is automatically called by timer once per second. 674 */ 675 676static void 677apm_timeout(void *dummy) 678{ 679 struct apm_softc *sc = &apm_softc; 680 681 if (apm_op_inprog) 682 apm_lastreq_notify(); 683 684 apm_processevent(); 685 686 if (sc->active == 1) 687 /* Run slightly more oftan than 1 Hz */ 688 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1 ); 689} 690 691/* enable APM BIOS */ 692static void 693apm_event_enable(void) 694{ 695 struct apm_softc *sc = &apm_softc; 696 697#ifdef APM_DEBUG 698 printf("called apm_event_enable()\n"); 699#endif 700 if (sc->initialized) { 701 sc->active = 1; 702 apm_timeout(sc); 703 } 704} 705 706/* disable APM BIOS */ 707static void 708apm_event_disable(void) 709{ 710 struct apm_softc *sc = &apm_softc; 711 712#ifdef APM_DEBUG 713 printf("called apm_event_disable()\n"); 714#endif 715 if (sc->initialized) { 716 untimeout(apm_timeout, NULL, apm_timeout_ch); 717 sc->active = 0; 718 } 719} 720 721/* halt CPU in scheduling loop */ 722static void 723apm_halt_cpu(void) 724{ 725 struct apm_softc *sc = &apm_softc; 726 727 if (sc->initialized) 728 sc->always_halt_cpu = 1; 729} 730 731/* don't halt CPU in scheduling loop */ 732static void 733apm_not_halt_cpu(void) 734{ 735 struct apm_softc *sc = &apm_softc; 736 737 if (sc->initialized) 738 sc->always_halt_cpu = 0; 739} 740 741/* device driver definitions */ 742 743/* 744 * probe APM (dummy): 745 * 746 * APM probing routine is placed on locore.s and apm_init.S because 747 * this process forces the CPU to turn to real mode or V86 mode. 748 * Current version uses real mode, but in a future version, we want 749 * to use V86 mode in APM initialization. 750 * 751 * XXX If VM86 is defined, we do. 752 */ 753 754static int 755apm_probe(device_t dev) 756{ 757 struct vm86frame vmf; 758 int i; 759 int disabled, flags; 760 761 if (resource_int_value("apm", 0, "disabled", &disabled) == 0 762 && disabled != 0) 763 return ENXIO; 764 765 device_set_desc(dev, "APM BIOS"); 766 767 if ( device_get_unit(dev) > 0 ) { 768 printf("apm: Only one APM driver supported.\n"); 769 return ENXIO; 770 } 771 772 if (resource_int_value("apm", 0, "flags", &flags) != 0) 773 flags = 0; 774 775 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 776 vmf.vmf_ax = (APM_BIOS << 8) | APM_INSTCHECK; 777 vmf.vmf_bx = 0; 778 if (((i = vm86_intcall(SYSTEM_BIOS, &vmf)) == 0) && 779 !(vmf.vmf_eflags & PSL_C) && 780 (vmf.vmf_bx == 0x504d)) { 781 782 apm_version = vmf.vmf_ax; 783 apm_flags = vmf.vmf_cx; 784 785 vmf.vmf_ax = (APM_BIOS << 8) | APM_PROT32CONNECT; 786 vmf.vmf_bx = 0; 787 if (((i = vm86_intcall(SYSTEM_BIOS, &vmf)) == 0) && 788 !(vmf.vmf_eflags & PSL_C)) { 789 790 apm_cs32_base = vmf.vmf_ax; 791 apm_cs_entry = vmf.vmf_ebx; 792 apm_cs16_base = vmf.vmf_cx; 793 apm_ds_base = vmf.vmf_dx; 794 apm_cs32_limit = vmf.vmf_si; 795 if (apm_version >= 0x0102) 796 apm_cs16_limit = (vmf.esi.r_ex >> 16); 797 apm_ds_limit = vmf.vmf_di; 798#ifdef APM_DEBUG 799 printf("apm: BIOS probe/32-bit connect successful\n"); 800#endif 801 } else { 802 /* XXX constant typo! */ 803 if (vmf.vmf_ah == APME_PROT32NOTDUPPORTED) { 804 apm_version = APMINI_NOT32BIT; 805 } else { 806 apm_version = APMINI_CONNECTERR; 807 } 808#ifdef APM_DEBUG 809 printf("apm: BIOS 32-bit connect failed: error 0x%x carry %d ah 0x%x\n", 810 i, (vmf.vmf_eflags & PSL_C) ? 1 : 0, vmf.vmf_ah); 811#endif 812 } 813 } else { 814 apm_version = APMINI_CANTFIND; 815#ifdef APM_DEBUG 816 printf("apm: BIOS probe failed: error 0x%x carry %d bx 0x%x\n", 817 i, (vmf.vmf_eflags & PSL_C) ? 1 : 0, vmf.vmf_bx); 818#endif 819 } 820 821 bzero(&apm_softc, sizeof(apm_softc)); 822 823 switch (apm_version) { 824 case APMINI_CANTFIND: 825 /* silent */ 826 return ENXIO; 827 case APMINI_NOT32BIT: 828 printf("apm: 32bit connection is not supported.\n"); 829 return ENXIO; 830 case APMINI_CONNECTERR: 831 printf("apm: 32-bit connection error.\n"); 832 return ENXIO; 833 } 834 if (flags & 0x20) 835 statclock_disable = 1; 836 return 0; 837} 838 839/* 840 * return 0 if the user will notice and handle the event, 841 * return 1 if the kernel driver should do so. 842 */ 843static int 844apm_record_event(struct apm_softc *sc, u_int event_type) 845{ 846 struct apm_event_info *evp; 847 848 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 849 return 1; /* no user waiting */ 850 if (sc->event_count == APM_NEVENTS) 851 return 1; /* overflow */ 852 if (sc->event_filter[event_type] == 0) 853 return 1; /* not registered */ 854 evp = &sc->event_list[sc->event_ptr]; 855 sc->event_count++; 856 sc->event_ptr++; 857 sc->event_ptr %= APM_NEVENTS; 858 evp->type = event_type; 859 evp->index = ++apm_evindex; 860 selwakeup(&sc->sc_rsel); 861 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 862} 863 864/* Process APM event */ 865static void 866apm_processevent(void) 867{ 868 int apm_event; 869 struct apm_softc *sc = &apm_softc; 870 871#ifdef APM_DEBUG 872# define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 873 printf("Received APM Event: " #symbol "\n"); 874#else 875# define OPMEV_DEBUGMESSAGE(symbol) case symbol: 876#endif 877 do { 878 apm_event = apm_getevent(); 879 switch (apm_event) { 880 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 881 if (apm_op_inprog == 0) { 882 apm_op_inprog++; 883 if (apm_record_event(sc, apm_event)) { 884 apm_suspend(PMST_STANDBY); 885 } 886 } 887 break; 888 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 889 apm_lastreq_notify(); 890 if (apm_op_inprog == 0) { 891 apm_op_inprog++; 892 if (apm_record_event(sc, apm_event)) { 893 apm_suspend(PMST_SUSPEND); 894 } 895 } 896 return; /* XXX skip the rest */ 897 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 898 apm_lastreq_notify(); 899 if (apm_op_inprog == 0) { 900 apm_op_inprog++; 901 if (apm_record_event(sc, apm_event)) { 902 apm_suspend(PMST_SUSPEND); 903 } 904 } 905 return; /* XXX skip the rest */ 906 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 907 apm_suspend(PMST_SUSPEND); 908 break; 909 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 910 apm_record_event(sc, apm_event); 911 apm_resume(); 912 break; 913 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 914 apm_record_event(sc, apm_event); 915 apm_resume(); 916 break; 917 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 918 apm_record_event(sc, apm_event); 919 apm_resume(); 920 break; 921 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 922 if (apm_record_event(sc, apm_event)) { 923 apm_battery_low(); 924 apm_suspend(PMST_SUSPEND); 925 } 926 break; 927 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 928 apm_record_event(sc, apm_event); 929 break; 930 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 931 apm_record_event(sc, apm_event); 932 inittodr(0); /* adjust time to RTC */ 933 break; 934 case PMEV_NOEVENT: 935 break; 936 default: 937 printf("Unknown Original APM Event 0x%x\n", apm_event); 938 break; 939 } 940 } while (apm_event != PMEV_NOEVENT); 941} 942 943/* 944 * Attach APM: 945 * 946 * Initialize APM driver (APM BIOS itself has been initialized in locore.s) 947 */ 948 949static int 950apm_attach(device_t dev) 951{ 952#define APM_KERNBASE KERNBASE 953 struct apm_softc *sc = &apm_softc; 954 int flags; 955 956 if (resource_int_value("apm", 0, "flags", &flags) != 0) 957 flags = 0; 958 959 sc->initialized = 0; 960 961 /* Must be externally enabled */ 962 sc->active = 0; 963 964 /* setup APM parameters */ 965 sc->cs16_base = (apm_cs16_base << 4) + APM_KERNBASE; 966 sc->cs32_base = (apm_cs32_base << 4) + APM_KERNBASE; 967 sc->ds_base = (apm_ds_base << 4) + APM_KERNBASE; 968 sc->cs32_limit = apm_cs32_limit - 1; 969 if (apm_cs16_limit == 0) 970 apm_cs16_limit = apm_cs32_limit; 971 sc->cs16_limit = apm_cs16_limit - 1; 972 sc->ds_limit = apm_ds_limit - 1; 973 sc->cs_entry = apm_cs_entry; 974 975 /* Always call HLT in idle loop */ 976 sc->always_halt_cpu = 1; 977 978 sc->slow_idle_cpu = ((apm_flags & APM_CPUIDLE_SLOW) != 0); 979 sc->disabled = ((apm_flags & APM_DISABLED) != 0); 980 sc->disengaged = ((apm_flags & APM_DISENGAGED) != 0); 981 982 /* print bootstrap messages */ 983#ifdef APM_DEBUG 984 printf("apm: APM BIOS version %04x\n", apm_version); 985 printf("apm: Code32 0x%08x, Code16 0x%08x, Data 0x%08x\n", 986 sc->cs32_base, sc->cs16_base, sc->ds_base); 987 printf("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 988 sc->cs_entry, is_enabled(sc->slow_idle_cpu), 989 is_enabled(!sc->disabled)); 990 printf("apm: CS32_limit=0x%x, CS16_limit=0x%x, DS_limit=0x%x\n", 991 (u_short)sc->cs32_limit, (u_short)sc->cs16_limit, (u_short)sc->ds_limit); 992#endif /* APM_DEBUG */ 993 994#if 0 995 /* Workaround for some buggy APM BIOS implementations */ 996 sc->cs_limit = 0xffff; 997 sc->ds_limit = 0xffff; 998#endif 999 1000 /* setup GDT */ 1001 setup_apm_gdt(sc->cs32_base, sc->cs16_base, sc->ds_base, 1002 sc->cs32_limit, sc->cs16_limit, sc->ds_limit); 1003 1004 /* setup entry point 48bit pointer */ 1005 apm_addr.segment = GSEL(GAPMCODE32_SEL, SEL_KPL); 1006 apm_addr.offset = sc->cs_entry; 1007 1008 if ((flags & 0x10)) { 1009 if ((flags & 0xf) >= 0x2) { 1010 apm_driver_version(0x102); 1011 } 1012 if (!apm_version && (flags & 0xf) >= 0x1) { 1013 apm_driver_version(0x101); 1014 } 1015 } else { 1016 apm_driver_version(0x102); 1017 if (!apm_version) 1018 apm_driver_version(0x101); 1019 } 1020 if (!apm_version) 1021 apm_version = 0x100; 1022 1023 sc->minorversion = ((apm_version & 0x00f0) >> 4) * 10 + 1024 ((apm_version & 0x000f) >> 0); 1025 sc->majorversion = ((apm_version & 0xf000) >> 12) * 10 + 1026 ((apm_version & 0x0f00) >> 8); 1027 1028 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1029 1030#ifdef APM_DEBUG 1031 if (sc->intversion >= INTVERSION(1, 1)) 1032 printf("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1033#endif 1034 1035 printf("apm: found APM BIOS version %d.%d\n", 1036 sc->majorversion, sc->minorversion); 1037 1038#ifdef APM_DEBUG 1039 printf("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1040#endif 1041 1042 /* enable power management */ 1043 if (sc->disabled) { 1044 if (apm_enable_disable_pm(1)) { 1045#ifdef APM_DEBUG 1046 printf("apm: *Warning* enable function failed! [%x]\n", 1047 apm_errno); 1048#endif 1049 } 1050 } 1051 1052 /* engage power managment (APM 1.1 or later) */ 1053 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1054 if (apm_engage_disengage_pm(1)) { 1055#ifdef APM_DEBUG 1056 printf("apm: *Warning* engage function failed err=[%x]", 1057 apm_errno); 1058 printf(" (Docked or using external power?).\n"); 1059#endif 1060 } 1061 } 1062 1063 /* default suspend hook */ 1064 sc->sc_suspend.ah_fun = apm_default_suspend; 1065 sc->sc_suspend.ah_arg = sc; 1066 sc->sc_suspend.ah_name = "default suspend"; 1067 sc->sc_suspend.ah_order = APM_MAX_ORDER; 1068 1069 /* default resume hook */ 1070 sc->sc_resume.ah_fun = apm_default_resume; 1071 sc->sc_resume.ah_arg = sc; 1072 sc->sc_resume.ah_name = "default resume"; 1073 sc->sc_resume.ah_order = APM_MIN_ORDER; 1074 1075 apm_hook_establish(APM_HOOK_SUSPEND, &sc->sc_suspend); 1076 apm_hook_establish(APM_HOOK_RESUME , &sc->sc_resume); 1077 1078 apm_event_enable(); 1079 1080 /* Power the system off using APM */ 1081 at_shutdown_pri(apm_power_off, NULL, SHUTDOWN_FINAL, SHUTDOWN_PRI_LAST); 1082 1083 sc->initialized = 1; 1084 1085#ifdef DEVFS 1086 sc->sc_devfs_token = 1087 devfs_add_devswf(&apm_cdevsw, 0, DV_CHR, 0, 0, 0600, "apm"); 1088#endif 1089 return 0; 1090} 1091 1092static int 1093apmopen(dev_t dev, int flag, int fmt, struct proc *p) 1094{ 1095 struct apm_softc *sc = &apm_softc; 1096 int ctl = APMDEV(dev); 1097 1098 if (!sc->initialized) 1099 return (ENXIO); 1100 1101 switch (ctl) { 1102 case APMDEV_CTL: 1103 if (!(flag & FWRITE)) 1104 return EINVAL; 1105 if (sc->sc_flags & SCFLAG_OCTL) 1106 return EBUSY; 1107 sc->sc_flags |= SCFLAG_OCTL; 1108 bzero(sc->event_filter, sizeof sc->event_filter); 1109 break; 1110 case APMDEV_NORMAL: 1111 sc->sc_flags |= SCFLAG_ONORMAL; 1112 break; 1113 default: 1114 return ENXIO; 1115 break; 1116 } 1117 return 0; 1118} 1119 1120static int 1121apmclose(dev_t dev, int flag, int fmt, struct proc *p) 1122{ 1123 struct apm_softc *sc = &apm_softc; 1124 int ctl = APMDEV(dev); 1125 1126 switch (ctl) { 1127 case APMDEV_CTL: 1128 apm_lastreq_rejected(); 1129 sc->sc_flags &= ~SCFLAG_OCTL; 1130 bzero(sc->event_filter, sizeof sc->event_filter); 1131 break; 1132 case APMDEV_NORMAL: 1133 sc->sc_flags &= ~SCFLAG_ONORMAL; 1134 break; 1135 } 1136 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1137 sc->event_count = 0; 1138 sc->event_ptr = 0; 1139 } 1140 return 0; 1141} 1142 1143static int 1144apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 1145{ 1146 struct apm_softc *sc = &apm_softc; 1147 int error = 0; 1148 int newstate; 1149 1150 if (!sc->initialized) 1151 return (ENXIO); 1152#ifdef APM_DEBUG 1153 printf("APM ioctl: cmd = 0x%x\n", cmd); 1154#endif 1155 switch (cmd) { 1156 case APMIO_SUSPEND: 1157 if (sc->active) 1158 apm_suspend(PMST_SUSPEND); 1159 else 1160 error = EINVAL; 1161 break; 1162 1163 case APMIO_STANDBY: 1164 if (sc->active) 1165 apm_suspend(PMST_STANDBY); 1166 else 1167 error = EINVAL; 1168 break; 1169 1170 case APMIO_GETINFO_OLD: 1171 { 1172 struct apm_info info; 1173 apm_info_old_t aiop; 1174 1175 if (apm_get_info(&info)) 1176 error = ENXIO; 1177 aiop = (apm_info_old_t)addr; 1178 aiop->ai_major = info.ai_major; 1179 aiop->ai_minor = info.ai_minor; 1180 aiop->ai_acline = info.ai_acline; 1181 aiop->ai_batt_stat = info.ai_batt_stat; 1182 aiop->ai_batt_life = info.ai_batt_life; 1183 aiop->ai_status = info.ai_status; 1184 } 1185 break; 1186 case APMIO_GETINFO: 1187 if (apm_get_info((apm_info_t)addr)) 1188 error = ENXIO; 1189 break; 1190 case APMIO_ENABLE: 1191 apm_event_enable(); 1192 break; 1193 case APMIO_DISABLE: 1194 apm_event_disable(); 1195 break; 1196 case APMIO_HALTCPU: 1197 apm_halt_cpu(); 1198 break; 1199 case APMIO_NOTHALTCPU: 1200 apm_not_halt_cpu(); 1201 break; 1202 case APMIO_DISPLAY: 1203 newstate = *(int *)addr; 1204 if (apm_display(newstate)) 1205 error = ENXIO; 1206 break; 1207 case APMIO_BIOS: 1208 if (apm_bios_call((struct apm_bios_arg*)addr) == 0) 1209 ((struct apm_bios_arg*)addr)->eax &= 0xff; 1210 break; 1211 default: 1212 error = EINVAL; 1213 break; 1214 } 1215 1216 /* for /dev/apmctl */ 1217 if (APMDEV(dev) == APMDEV_CTL) { 1218 struct apm_event_info *evp; 1219 int i; 1220 1221 error = 0; 1222 switch (cmd) { 1223 case APMIO_NEXTEVENT: 1224 if (!sc->event_count) { 1225 error = EAGAIN; 1226 } else { 1227 evp = (struct apm_event_info *)addr; 1228 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1229 i %= APM_NEVENTS; 1230 *evp = sc->event_list[i]; 1231 sc->event_count--; 1232 } 1233 break; 1234 case APMIO_REJECTLASTREQ: 1235 if (apm_lastreq_rejected()) { 1236 error = EINVAL; 1237 } 1238 break; 1239 default: 1240 error = EINVAL; 1241 break; 1242 } 1243 } 1244 1245 return error; 1246} 1247 1248static int 1249apmwrite(dev_t dev, struct uio *uio, int ioflag) 1250{ 1251 struct apm_softc *sc = &apm_softc; 1252 u_int event_type; 1253 int error; 1254 u_char enabled; 1255 1256 if (APMDEV(dev) != APMDEV_CTL) 1257 return(ENODEV); 1258 if (uio->uio_resid != sizeof(u_int)) 1259 return(E2BIG); 1260 1261 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1262 return(error); 1263 1264 if (event_type < 0 || event_type >= APM_NPMEV) 1265 return(EINVAL); 1266 1267 if (sc->event_filter[event_type] == 0) { 1268 enabled = 1; 1269 } else { 1270 enabled = 0; 1271 } 1272 sc->event_filter[event_type] = enabled; 1273#ifdef APM_DEBUG 1274 printf("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1275#endif 1276 1277 return uio->uio_resid; 1278} 1279 1280static int 1281apmpoll(dev_t dev, int events, struct proc *p) 1282{ 1283 struct apm_softc *sc = &apm_softc; 1284 int revents = 0; 1285 1286 if (events & (POLLIN | POLLRDNORM)) { 1287 if (sc->event_count) { 1288 revents |= events & (POLLIN | POLLRDNORM); 1289 } else { 1290 selrecord(p, &sc->sc_rsel); 1291 } 1292 } 1293 1294 return (revents); 1295} 1296 1297static device_method_t apm_methods[] = { 1298 /* Device interface */ 1299 DEVMETHOD(device_probe, apm_probe), 1300 DEVMETHOD(device_attach, apm_attach), 1301 1302 { 0, 0 } 1303}; 1304 1305static driver_t apm_driver = { 1306 "apm", 1307 apm_methods, 1308 1, /* no softc (XXX) */ 1309}; 1310 1311static devclass_t apm_devclass; 1312 1313DEV_DRIVER_MODULE(apm, nexus, apm_driver, apm_devclass, apm_cdevsw, 0, 0); 1314