apm.c revision 46792
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 1.84 1999/05/09 04:58:13 yokota Exp $ 19 */ 20 21#include "opt_devfs.h" 22#include "opt_vm86.h" 23#include "opt_smp.h" 24 25#include <sys/param.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/systm.h> 32#include <sys/time.h> 33#include <sys/reboot.h> 34#include <sys/bus.h> 35#include <machine/apm_bios.h> 36#include <machine/segments.h> 37#include <machine/clock.h> 38#include <vm/vm.h> 39#include <vm/vm_param.h> 40#include <vm/pmap.h> 41#include <sys/syslog.h> 42#include <i386/apm/apm_setup.h> 43 44#ifdef VM86 45#include <machine/psl.h> 46#include <machine/vm86.h> 47#endif 48 49#ifdef SMP 50#include <machine/smp.h> 51#endif 52 53static int apm_display __P((int newstate)); 54static int apm_int __P((u_long *eax, u_long *ebx, u_long *ecx, u_long *edx)); 55static void apm_resume __P((void)); 56 57/* static data */ 58struct apm_softc { 59 int initialized, active; 60 int always_halt_cpu, slow_idle_cpu; 61 int disabled, disengaged; 62 u_int minorversion, majorversion; 63 u_int cs32_base, cs16_base, ds_base; 64 u_int cs16_limit, cs32_limit, ds_limit; 65 u_int cs_entry; 66 u_int intversion; 67 struct apmhook sc_suspend; 68 struct apmhook sc_resume; 69#ifdef DEVFS 70 void *sc_devfs_token; 71#endif 72}; 73 74static struct apm_softc apm_softc; 75static struct apmhook *hook[NAPM_HOOK]; /* XXX */ 76 77#define is_enabled(foo) ((foo) ? "enabled" : "disabled") 78 79/* Map version number to integer (keeps ordering of version numbers) */ 80#define INTVERSION(major, minor) ((major)*100 + (minor)) 81 82static struct callout_handle apm_timeout_ch = 83 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch); 84 85static timeout_t apm_timeout; 86static d_open_t apmopen; 87static d_close_t apmclose; 88static d_ioctl_t apmioctl; 89 90#define CDEV_MAJOR 39 91static struct cdevsw apm_cdevsw = 92 { apmopen, apmclose, noread, nowrite, /*39*/ 93 apmioctl, nostop, nullreset, nodevtotty,/* APM */ 94 seltrue, nommap, NULL , "apm" ,NULL, -1}; 95 96/* setup APM GDT discriptors */ 97static void 98setup_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) 99{ 100#ifdef SMP 101 int x; 102#endif 103 104 /* setup 32bit code segment */ 105 gdt_segs[GAPMCODE32_SEL].ssd_base = code32_base; 106 gdt_segs[GAPMCODE32_SEL].ssd_limit = code32_limit; 107 108 /* setup 16bit code segment */ 109 gdt_segs[GAPMCODE16_SEL].ssd_base = code16_base; 110 gdt_segs[GAPMCODE16_SEL].ssd_limit = code16_limit; 111 112 /* setup data segment */ 113 gdt_segs[GAPMDATA_SEL ].ssd_base = data_base; 114 gdt_segs[GAPMDATA_SEL ].ssd_limit = data_limit; 115 116 /* reflect these changes on physical GDT */ 117 ssdtosd(gdt_segs + GAPMCODE32_SEL, &gdt[GAPMCODE32_SEL].sd); 118 ssdtosd(gdt_segs + GAPMCODE16_SEL, &gdt[GAPMCODE16_SEL].sd); 119 ssdtosd(gdt_segs + GAPMDATA_SEL , &gdt[GAPMDATA_SEL ].sd); 120 121#ifdef SMP 122 for (x = 1; x < NCPU; x++) { 123 gdt[x * NGDT + GAPMCODE32_SEL].sd = gdt[GAPMCODE32_SEL].sd; 124 gdt[x * NGDT + GAPMCODE16_SEL].sd = gdt[GAPMCODE16_SEL].sd; 125 gdt[x * NGDT + GAPMDATA_SEL ].sd = gdt[GAPMDATA_SEL ].sd; 126 } 127#endif 128} 129 130/* 48bit far pointer. Do not staticize - used from apm_setup.s */ 131struct addr48 { 132 u_long offset; 133 u_short segment; 134} apm_addr; 135 136static int apm_errno; 137 138static int 139apm_int(u_long *eax, u_long *ebx, u_long *ecx, u_long *edx) 140{ 141 struct apm_bios_arg apa; 142 int cf; 143 144 apa.eax = *eax; 145 apa.ebx = *ebx; 146 apa.ecx = *ecx; 147 apa.edx = *edx; 148 cf = apm_bios_call(&apa); 149 *eax = apa.eax; 150 *ebx = apa.ebx; 151 *ecx = apa.ecx; 152 *edx = apa.edx; 153 apm_errno = ((*eax) >> 8) & 0xff; 154 return cf; 155} 156 157 158/* enable/disable power management */ 159static int 160apm_enable_disable_pm(int enable) 161{ 162 struct apm_softc *sc = &apm_softc; 163 164 u_long eax, ebx, ecx, edx; 165 166 eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM; 167 168 if (sc->intversion >= INTVERSION(1, 1)) 169 ebx = PMDV_ALLDEV; 170 else 171 ebx = 0xffff; /* APM version 1.0 only */ 172 ecx = enable; 173 edx = 0; 174 return apm_int(&eax, &ebx, &ecx, &edx); 175} 176 177static void 178apm_driver_version(int version) 179{ 180 u_long eax, ebx, ecx, edx; 181 182 /* First try APM 1.2 */ 183 eax = (APM_BIOS << 8) | APM_DRVVERSION; 184 ebx = 0x0; 185 ecx = version; 186 edx = 0; 187 if(!apm_int(&eax, &ebx, &ecx, &edx)) 188 apm_version = eax & 0xffff; 189} 190 191/* engage/disengage power management (APM 1.1 or later) */ 192static int 193apm_engage_disengage_pm(int engage) 194{ 195 u_long eax, ebx, ecx, edx; 196 197 eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM; 198 ebx = PMDV_ALLDEV; 199 ecx = engage; 200 edx = 0; 201 return(apm_int(&eax, &ebx, &ecx, &edx)); 202} 203 204/* get PM event */ 205static u_int 206apm_getevent(void) 207{ 208 u_long eax, ebx, ecx, edx; 209 210 eax = (APM_BIOS << 8) | APM_GETPMEVENT; 211 212 ebx = 0; 213 ecx = 0; 214 edx = 0; 215 if (apm_int(&eax, &ebx, &ecx, &edx)) 216 return PMEV_NOEVENT; 217 218 return ebx & 0xffff; 219} 220 221/* suspend entire system */ 222static int 223apm_suspend_system(int state) 224{ 225 u_long eax, ebx, ecx, edx; 226 227 eax = (APM_BIOS << 8) | APM_SETPWSTATE; 228 ebx = PMDV_ALLDEV; 229 ecx = state; 230 edx = 0; 231 232 if (apm_int(&eax, &ebx, &ecx, &edx)) { 233 printf("Entire system suspend failure: errcode = %ld\n", 234 0xff & (eax >> 8)); 235 return 1; 236 } 237 return 0; 238} 239 240/* Display control */ 241/* 242 * Experimental implementation: My laptop machine can't handle this function 243 * If your laptop can control the display via APM, please inform me. 244 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 245 */ 246static int 247apm_display(int newstate) 248{ 249 u_long eax, ebx, ecx, edx; 250 251 eax = (APM_BIOS << 8) | APM_SETPWSTATE; 252 ebx = PMDV_DISP0; 253 ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 254 edx = 0; 255 if (apm_int(&eax, &ebx, &ecx, &edx)) { 256 printf("Display off failure: errcode = %ld\n", 257 0xff & (eax >> 8)); 258 return 1; 259 } 260 return 0; 261} 262 263/* 264 * Turn off the entire system. 265 */ 266static void 267apm_power_off(int howto, void *junk) 268{ 269 u_long eax, ebx, ecx, edx; 270 271 /* Not halting powering off, or not active */ 272 if (!(howto & RB_POWEROFF) || !apm_softc.active) 273 return; 274 eax = (APM_BIOS << 8) | APM_SETPWSTATE; 275 ebx = PMDV_ALLDEV; 276 ecx = PMST_OFF; 277 edx = 0; 278 apm_int(&eax, &ebx, &ecx, &edx); 279} 280 281/* APM Battery low handler */ 282static void 283apm_battery_low(void) 284{ 285 printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 286} 287 288/* APM hook manager */ 289static struct apmhook * 290apm_add_hook(struct apmhook **list, struct apmhook *ah) 291{ 292 int s; 293 struct apmhook *p, *prev; 294 295#ifdef APM_DEBUG 296 printf("Add hook \"%s\"\n", ah->ah_name); 297#endif 298 299 s = splhigh(); 300 if (ah == NULL) 301 panic("illegal apm_hook!"); 302 prev = NULL; 303 for (p = *list; p != NULL; prev = p, p = p->ah_next) 304 if (p->ah_order > ah->ah_order) 305 break; 306 307 if (prev == NULL) { 308 ah->ah_next = *list; 309 *list = ah; 310 } else { 311 ah->ah_next = prev->ah_next; 312 prev->ah_next = ah; 313 } 314 splx(s); 315 return ah; 316} 317 318static void 319apm_del_hook(struct apmhook **list, struct apmhook *ah) 320{ 321 int s; 322 struct apmhook *p, *prev; 323 324 s = splhigh(); 325 prev = NULL; 326 for (p = *list; p != NULL; prev = p, p = p->ah_next) 327 if (p == ah) 328 goto deleteit; 329 panic("Tried to delete unregistered apm_hook."); 330 goto nosuchnode; 331deleteit: 332 if (prev != NULL) 333 prev->ah_next = p->ah_next; 334 else 335 *list = p->ah_next; 336nosuchnode: 337 splx(s); 338} 339 340 341/* APM driver calls some functions automatically */ 342static void 343apm_execute_hook(struct apmhook *list) 344{ 345 struct apmhook *p; 346 347 for (p = list; p != NULL; p = p->ah_next) { 348#ifdef APM_DEBUG 349 printf("Execute APM hook \"%s.\"\n", p->ah_name); 350#endif 351 if ((*(p->ah_fun))(p->ah_arg)) 352 printf("Warning: APM hook \"%s\" failed", p->ah_name); 353 } 354} 355 356 357/* establish an apm hook */ 358struct apmhook * 359apm_hook_establish(int apmh, struct apmhook *ah) 360{ 361 if (apmh < 0 || apmh >= NAPM_HOOK) 362 return NULL; 363 364 return apm_add_hook(&hook[apmh], ah); 365} 366 367/* disestablish an apm hook */ 368void 369apm_hook_disestablish(int apmh, struct apmhook *ah) 370{ 371 if (apmh < 0 || apmh >= NAPM_HOOK) 372 return; 373 374 apm_del_hook(&hook[apmh], ah); 375} 376 377 378static struct timeval suspend_time; 379static struct timeval diff_time; 380 381static int 382apm_default_resume(void *arg) 383{ 384 int pl; 385 u_int second, minute, hour; 386 struct timeval resume_time, tmp_time; 387 388 /* modified for adjkerntz */ 389 pl = splsoftclock(); 390 inittodr(0); /* adjust time to RTC */ 391 microtime(&resume_time); 392 getmicrotime(&tmp_time); 393 timevaladd(&tmp_time, &diff_time); 394 395#ifdef FIXME 396 /* XXX THIS DOESN'T WORK!!! */ 397 time = tmp_time; 398#endif 399 400#ifdef APM_FIXUP_CALLTODO 401 /* Calculate the delta time suspended */ 402 timevalsub(&resume_time, &suspend_time); 403 /* Fixup the calltodo list with the delta time. */ 404 adjust_timeout_calltodo(&resume_time); 405#endif /* APM_FIXUP_CALLTODOK */ 406 splx(pl); 407#ifndef APM_FIXUP_CALLTODO 408 second = resume_time.tv_sec - suspend_time.tv_sec; 409#else /* APM_FIXUP_CALLTODO */ 410 /* 411 * We've already calculated resume_time to be the delta between 412 * the suspend and the resume. 413 */ 414 second = resume_time.tv_sec; 415#endif /* APM_FIXUP_CALLTODO */ 416 hour = second / 3600; 417 second %= 3600; 418 minute = second / 60; 419 second %= 60; 420 log(LOG_NOTICE, "resumed from suspended mode (slept %02d:%02d:%02d)\n", 421 hour, minute, second); 422 return 0; 423} 424 425static int 426apm_default_suspend(void *arg) 427{ 428 int pl; 429 430 pl = splsoftclock(); 431 microtime(&diff_time); 432 inittodr(0); 433 microtime(&suspend_time); 434 timevalsub(&diff_time, &suspend_time); 435 splx(pl); 436 return 0; 437} 438 439static void apm_processevent(void); 440 441/* 442 * Public interface to the suspend/resume: 443 * 444 * Execute suspend and resume hook before and after sleep, respectively. 445 * 446 */ 447 448void 449apm_suspend(int state) 450{ 451 struct apm_softc *sc = &apm_softc; 452 int error; 453 454 if (!sc) 455 return; 456 457 if (sc->initialized) { 458 error = DEVICE_SUSPEND(root_bus); 459 /* 460 * XXX Shouldn't ignore the error like this, but should 461 * instead fix the newbus code. Until that happens, 462 * I'm doing this to get suspend working again. 463 */ 464 if (error) 465 printf("DEVICE_SUSPEND error %d, ignored\n", error); 466 apm_execute_hook(hook[APM_HOOK_SUSPEND]); 467 if (apm_suspend_system(state) == 0) 468 apm_processevent(); 469 else 470 /* Failure, 'resume' the system again */ 471 apm_execute_hook(hook[APM_HOOK_RESUME]); 472 } 473} 474 475void 476apm_resume(void) 477{ 478 struct apm_softc *sc = &apm_softc; 479 480 if (!sc) 481 return; 482 483 if (sc->initialized) { 484 DEVICE_RESUME(root_bus); 485 apm_execute_hook(hook[APM_HOOK_RESUME]); 486 } 487} 488 489 490/* get APM information */ 491static int 492apm_get_info(apm_info_t aip) 493{ 494 struct apm_softc *sc = &apm_softc; 495 u_long eax, ebx, ecx, edx; 496 497 eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 498 ebx = PMDV_ALLDEV; 499 ecx = 0; 500 edx = 0xffff; /* default to unknown battery time */ 501 502 if (apm_int(&eax, &ebx, &ecx, &edx)) 503 return 1; 504 505 aip->ai_infoversion = 1; 506 aip->ai_acline = (ebx >> 8) & 0xff; 507 aip->ai_batt_stat = ebx & 0xff; 508 aip->ai_batt_life = ecx & 0xff; 509 aip->ai_major = (u_int)sc->majorversion; 510 aip->ai_minor = (u_int)sc->minorversion; 511 aip->ai_status = (u_int)sc->active; 512 edx &= 0xffff; 513 if (edx == 0xffff) /* Time is unknown */ 514 aip->ai_batt_time = -1; 515 else if (edx & 0x8000) /* Time is in minutes */ 516 aip->ai_batt_time = (edx & 0x7fff) * 60; 517 else /* Time is in seconds */ 518 aip->ai_batt_time = edx; 519 520 eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 521 ebx = 0; 522 ecx = 0; 523 edx = 0; 524 if (apm_int(&eax, &ebx, &ecx, &edx)) { 525 aip->ai_batteries = -1; /* Unknown */ 526 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 527 } else { 528 aip->ai_batteries = ebx & 0xff; 529 aip->ai_capabilities = ecx & 0xf; 530 } 531 532 bzero(aip->ai_spare, sizeof aip->ai_spare); 533 534 return 0; 535} 536 537 538/* inform APM BIOS that CPU is idle */ 539void 540apm_cpu_idle(void) 541{ 542 struct apm_softc *sc = &apm_softc; 543 544 if (sc->active) { 545 u_long eax, ebx, ecx, edx; 546 547 eax = (APM_BIOS <<8) | APM_CPUIDLE; 548 edx = ecx = ebx = 0; 549 apm_int(&eax, &ebx, &ecx, &edx); 550 } 551 /* 552 * Some APM implementation halts CPU in BIOS, whenever 553 * "CPU-idle" function are invoked, but swtch() of 554 * FreeBSD halts CPU, therefore, CPU is halted twice 555 * in the sched loop. It makes the interrupt latency 556 * terribly long and be able to cause a serious problem 557 * in interrupt processing. We prevent it by removing 558 * "hlt" operation from swtch() and managed it under 559 * APM driver. 560 */ 561 if (!sc->active || sc->always_halt_cpu) 562 __asm("hlt"); /* wait for interrupt */ 563} 564 565/* inform APM BIOS that CPU is busy */ 566void 567apm_cpu_busy(void) 568{ 569 struct apm_softc *sc = &apm_softc; 570 571 /* 572 * The APM specification says this is only necessary if your BIOS 573 * slows down the processor in the idle task, otherwise it's not 574 * necessary. 575 */ 576 if (sc->slow_idle_cpu && sc->active) { 577 u_long eax, ebx, ecx, edx; 578 579 eax = (APM_BIOS <<8) | APM_CPUBUSY; 580 edx = ecx = ebx = 0; 581 apm_int(&eax, &ebx, &ecx, &edx); 582 } 583} 584 585 586/* 587 * APM timeout routine: 588 * 589 * This routine is automatically called by timer once per second. 590 */ 591 592static void 593apm_timeout(void *dummy) 594{ 595 struct apm_softc *sc = &apm_softc; 596 597 apm_processevent(); 598 if (sc->active == 1) 599 /* Run slightly more oftan than 1 Hz */ 600 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1 ); 601} 602 603/* enable APM BIOS */ 604static void 605apm_event_enable(void) 606{ 607 struct apm_softc *sc = &apm_softc; 608 609#ifdef APM_DEBUG 610 printf("called apm_event_enable()\n"); 611#endif 612 if (sc->initialized) { 613 sc->active = 1; 614 apm_timeout(sc); 615 } 616} 617 618/* disable APM BIOS */ 619static void 620apm_event_disable(void) 621{ 622 struct apm_softc *sc = &apm_softc; 623 624#ifdef APM_DEBUG 625 printf("called apm_event_disable()\n"); 626#endif 627 if (sc->initialized) { 628 untimeout(apm_timeout, NULL, apm_timeout_ch); 629 sc->active = 0; 630 } 631} 632 633/* halt CPU in scheduling loop */ 634static void 635apm_halt_cpu(void) 636{ 637 struct apm_softc *sc = &apm_softc; 638 639 if (sc->initialized) 640 sc->always_halt_cpu = 1; 641} 642 643/* don't halt CPU in scheduling loop */ 644static void 645apm_not_halt_cpu(void) 646{ 647 struct apm_softc *sc = &apm_softc; 648 649 if (sc->initialized) 650 sc->always_halt_cpu = 0; 651} 652 653/* device driver definitions */ 654 655/* 656 * probe APM (dummy): 657 * 658 * APM probing routine is placed on locore.s and apm_init.S because 659 * this process forces the CPU to turn to real mode or V86 mode. 660 * Current version uses real mode, but in a future version, we want 661 * to use V86 mode in APM initialization. 662 * 663 * XXX If VM86 is defined, we do. 664 */ 665 666static int 667apm_probe(device_t dev) 668{ 669#ifdef VM86 670 struct vm86frame vmf; 671 int i; 672#endif 673 int disabled, flags; 674 675 if (resource_int_value("apm", 0, "disabled", &disabled) == 0 676 && disabled != 0) 677 return ENXIO; 678 679 device_set_desc(dev, "APM BIOS"); 680 681 if ( device_get_unit(dev) > 0 ) { 682 printf("apm: Only one APM driver supported.\n"); 683 return ENXIO; 684 } 685 686 if (resource_int_value("apm", 0, "flags", &flags) != 0) 687 flags = 0; 688 689#ifdef VM86 690 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 691 vmf.vmf_ax = (APM_BIOS << 8) | APM_INSTCHECK; 692 vmf.vmf_bx = 0; 693 if (((i = vm86_intcall(SYSTEM_BIOS, &vmf)) == 0) && 694 !(vmf.vmf_eflags & PSL_C) && 695 (vmf.vmf_bx == 0x504d)) { 696 697 apm_version = vmf.vmf_ax; 698 apm_flags = vmf.vmf_cx; 699 700 vmf.vmf_ax = (APM_BIOS << 8) | APM_PROT32CONNECT; 701 vmf.vmf_bx = 0; 702 if (((i = vm86_intcall(SYSTEM_BIOS, &vmf)) == 0) && 703 !(vmf.vmf_eflags & PSL_C)) { 704 705 apm_cs32_base = vmf.vmf_ax; 706 apm_cs_entry = vmf.vmf_ebx; 707 apm_cs16_base = vmf.vmf_cx; 708 apm_ds_base = vmf.vmf_dx; 709 apm_cs32_limit = vmf.vmf_si; 710 if (apm_version >= 0x0102) 711 apm_cs16_limit = (vmf.esi.r_ex >> 16); 712 apm_ds_limit = vmf.vmf_di; 713#ifdef APM_DEBUG 714 printf("apm: BIOS probe/32-bit connect successful\n"); 715#endif 716 } else { 717 /* XXX constant typo! */ 718 if (vmf.vmf_ah == APME_PROT32NOTDUPPORTED) { 719 apm_version = APMINI_NOT32BIT; 720 } else { 721 apm_version = APMINI_CONNECTERR; 722 } 723#ifdef APM_DEBUG 724 printf("apm: BIOS 32-bit connect failed: error 0x%x carry %d ah 0x%x\n", 725 i, (vmf.vmf_eflags & PSL_C) ? 1 : 0, vmf.vmf_ah); 726#endif 727 } 728 } else { 729 apm_version = APMINI_CANTFIND; 730#ifdef APM_DEBUG 731 printf("apm: BIOS probe failed: error 0x%x carry %d bx 0x%x\n", 732 i, (vmf.vmf_eflags & PSL_C) ? 1 : 0, vmf.vmf_bx); 733#endif 734 } 735#endif 736 737 bzero(&apm_softc, sizeof(apm_softc)); 738 739 switch (apm_version) { 740 case APMINI_CANTFIND: 741 /* silent */ 742 return ENXIO; 743 case APMINI_NOT32BIT: 744 printf("apm: 32bit connection is not supported.\n"); 745 return ENXIO; 746 case APMINI_CONNECTERR: 747 printf("apm: 32-bit connection error.\n"); 748 return ENXIO; 749 } 750 if (flags & 0x20) 751 statclock_disable = 1; 752 return 0; 753} 754 755 756/* Process APM event */ 757static void 758apm_processevent(void) 759{ 760 int apm_event; 761 762#ifdef APM_DEBUG 763# define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 764 printf("Received APM Event: " #symbol "\n"); 765#else 766# define OPMEV_DEBUGMESSAGE(symbol) case symbol: 767#endif 768 do { 769 apm_event = apm_getevent(); 770 switch (apm_event) { 771 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 772 apm_suspend(PMST_STANDBY); 773 break; 774 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 775 apm_suspend(PMST_SUSPEND); 776 break; 777 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 778 apm_suspend(PMST_SUSPEND); 779 break; 780 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 781 apm_suspend(PMST_SUSPEND); 782 break; 783 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 784 apm_resume(); 785 break; 786 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 787 apm_resume(); 788 break; 789 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 790 apm_resume(); 791 break; 792 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 793 apm_battery_low(); 794 apm_suspend(PMST_SUSPEND); 795 break; 796 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 797 break; 798 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 799 inittodr(0); /* adjust time to RTC */ 800 break; 801 case PMEV_NOEVENT: 802 break; 803 default: 804 printf("Unknown Original APM Event 0x%x\n", apm_event); 805 break; 806 } 807 } while (apm_event != PMEV_NOEVENT); 808} 809 810/* 811 * Attach APM: 812 * 813 * Initialize APM driver (APM BIOS itself has been initialized in locore.s) 814 */ 815 816static int 817apm_attach(device_t dev) 818{ 819#define APM_KERNBASE KERNBASE 820 struct apm_softc *sc = &apm_softc; 821 int flags; 822 823 if (resource_int_value("apm", 0, "flags", &flags) != 0) 824 flags = 0; 825 826 sc->initialized = 0; 827 828 /* Must be externally enabled */ 829 sc->active = 0; 830 831 /* setup APM parameters */ 832 sc->cs16_base = (apm_cs16_base << 4) + APM_KERNBASE; 833 sc->cs32_base = (apm_cs32_base << 4) + APM_KERNBASE; 834 sc->ds_base = (apm_ds_base << 4) + APM_KERNBASE; 835 sc->cs32_limit = apm_cs32_limit - 1; 836 if (apm_cs16_limit == 0) 837 apm_cs16_limit = apm_cs32_limit; 838 sc->cs16_limit = apm_cs16_limit - 1; 839 sc->ds_limit = apm_ds_limit - 1; 840 sc->cs_entry = apm_cs_entry; 841 842 /* Always call HLT in idle loop */ 843 sc->always_halt_cpu = 1; 844 845 sc->slow_idle_cpu = ((apm_flags & APM_CPUIDLE_SLOW) != 0); 846 sc->disabled = ((apm_flags & APM_DISABLED) != 0); 847 sc->disengaged = ((apm_flags & APM_DISENGAGED) != 0); 848 849 /* print bootstrap messages */ 850#ifdef APM_DEBUG 851 printf("apm: APM BIOS version %04x\n", apm_version); 852 printf("apm: Code32 0x%08x, Code16 0x%08x, Data 0x%08x\n", 853 sc->cs32_base, sc->cs16_base, sc->ds_base); 854 printf("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 855 sc->cs_entry, is_enabled(sc->slow_idle_cpu), 856 is_enabled(!sc->disabled)); 857 printf("apm: CS32_limit=0x%x, CS16_limit=0x%x, DS_limit=0x%x\n", 858 (u_short)sc->cs32_limit, (u_short)sc->cs16_limit, (u_short)sc->ds_limit); 859#endif /* APM_DEBUG */ 860 861#if 0 862 /* Workaround for some buggy APM BIOS implementations */ 863 sc->cs_limit = 0xffff; 864 sc->ds_limit = 0xffff; 865#endif 866 867 /* setup GDT */ 868 setup_apm_gdt(sc->cs32_base, sc->cs16_base, sc->ds_base, 869 sc->cs32_limit, sc->cs16_limit, sc->ds_limit); 870 871 /* setup entry point 48bit pointer */ 872 apm_addr.segment = GSEL(GAPMCODE32_SEL, SEL_KPL); 873 apm_addr.offset = sc->cs_entry; 874 875 if ((flags & 0x10)) { 876 if ((flags & 0xf) >= 0x2) { 877 apm_driver_version(0x102); 878 } 879 if (!apm_version && (flags & 0xf) >= 0x1) { 880 apm_driver_version(0x101); 881 } 882 } else { 883 apm_driver_version(0x102); 884 if (!apm_version) 885 apm_driver_version(0x101); 886 } 887 if (!apm_version) 888 apm_version = 0x100; 889 890 sc->minorversion = ((apm_version & 0x00f0) >> 4) * 10 + 891 ((apm_version & 0x000f) >> 0); 892 sc->majorversion = ((apm_version & 0xf000) >> 12) * 10 + 893 ((apm_version & 0x0f00) >> 8); 894 895 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 896 897#ifdef APM_DEBUG 898 if (sc->intversion >= INTVERSION(1, 1)) 899 printf("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 900#endif 901 902 printf("apm: found APM BIOS version %d.%d\n", 903 sc->majorversion, sc->minorversion); 904 905#ifdef APM_DEBUG 906 printf("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 907#endif 908 909 /* enable power management */ 910 if (sc->disabled) { 911 if (apm_enable_disable_pm(1)) { 912#ifdef APM_DEBUG 913 printf("apm: *Warning* enable function failed! [%x]\n", 914 apm_errno); 915#endif 916 } 917 } 918 919 /* engage power managment (APM 1.1 or later) */ 920 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 921 if (apm_engage_disengage_pm(1)) { 922#ifdef APM_DEBUG 923 printf("apm: *Warning* engage function failed err=[%x]", 924 apm_errno); 925 printf(" (Docked or using external power?).\n"); 926#endif 927 } 928 } 929 930 /* default suspend hook */ 931 sc->sc_suspend.ah_fun = apm_default_suspend; 932 sc->sc_suspend.ah_arg = sc; 933 sc->sc_suspend.ah_name = "default suspend"; 934 sc->sc_suspend.ah_order = APM_MAX_ORDER; 935 936 /* default resume hook */ 937 sc->sc_resume.ah_fun = apm_default_resume; 938 sc->sc_resume.ah_arg = sc; 939 sc->sc_resume.ah_name = "default resume"; 940 sc->sc_resume.ah_order = APM_MIN_ORDER; 941 942 apm_hook_establish(APM_HOOK_SUSPEND, &sc->sc_suspend); 943 apm_hook_establish(APM_HOOK_RESUME , &sc->sc_resume); 944 945 apm_event_enable(); 946 947 /* Power the system off using APM */ 948 at_shutdown_pri(apm_power_off, NULL, SHUTDOWN_FINAL, SHUTDOWN_PRI_LAST); 949 950 sc->initialized = 1; 951 952#ifdef DEVFS 953 sc->sc_devfs_token = 954 devfs_add_devswf(&apm_cdevsw, 0, DV_CHR, 0, 0, 0600, "apm"); 955#endif 956 return 0; 957} 958 959static int 960apmopen(dev_t dev, int flag, int fmt, struct proc *p) 961{ 962 struct apm_softc *sc = &apm_softc; 963 964 if (minor(dev) != 0 || !sc->initialized) 965 return (ENXIO); 966 967 return 0; 968} 969 970static int 971apmclose(dev_t dev, int flag, int fmt, struct proc *p) 972{ 973 return 0; 974} 975 976static int 977apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 978{ 979 struct apm_softc *sc = &apm_softc; 980 int error = 0; 981 int newstate; 982 983 if (minor(dev) != 0 || !sc->initialized) 984 return (ENXIO); 985#ifdef APM_DEBUG 986 printf("APM ioctl: cmd = 0x%x\n", cmd); 987#endif 988 switch (cmd) { 989 case APMIO_SUSPEND: 990 if (sc->active) 991 apm_suspend(PMST_SUSPEND); 992 else 993 error = EINVAL; 994 break; 995 996 case APMIO_STANDBY: 997 if (sc->active) 998 apm_suspend(PMST_STANDBY); 999 else 1000 error = EINVAL; 1001 break; 1002 1003 case APMIO_GETINFO_OLD: 1004 { 1005 struct apm_info info; 1006 apm_info_old_t aiop; 1007 1008 if (apm_get_info(&info)) 1009 error = ENXIO; 1010 aiop = (apm_info_old_t)addr; 1011 aiop->ai_major = info.ai_major; 1012 aiop->ai_minor = info.ai_minor; 1013 aiop->ai_acline = info.ai_acline; 1014 aiop->ai_batt_stat = info.ai_batt_stat; 1015 aiop->ai_batt_life = info.ai_batt_life; 1016 aiop->ai_status = info.ai_status; 1017 } 1018 break; 1019 case APMIO_GETINFO: 1020 if (apm_get_info((apm_info_t)addr)) 1021 error = ENXIO; 1022 break; 1023 case APMIO_ENABLE: 1024 apm_event_enable(); 1025 break; 1026 case APMIO_DISABLE: 1027 apm_event_disable(); 1028 break; 1029 case APMIO_HALTCPU: 1030 apm_halt_cpu(); 1031 break; 1032 case APMIO_NOTHALTCPU: 1033 apm_not_halt_cpu(); 1034 break; 1035 case APMIO_DISPLAY: 1036 newstate = *(int *)addr; 1037 if (apm_display(newstate)) 1038 error = ENXIO; 1039 break; 1040 case APMIO_BIOS: 1041 if (apm_bios_call((struct apm_bios_arg*)addr) == 0) 1042 ((struct apm_bios_arg*)addr)->eax &= 0xff; 1043 break; 1044 default: 1045 error = EINVAL; 1046 break; 1047 } 1048 return error; 1049} 1050 1051static device_method_t apm_methods[] = { 1052 /* Device interface */ 1053 DEVMETHOD(device_probe, apm_probe), 1054 DEVMETHOD(device_attach, apm_attach), 1055 1056 { 0, 0 } 1057}; 1058 1059static driver_t apm_driver = { 1060 "apm", 1061 apm_methods, 1062 1, /* no softc (XXX) */ 1063}; 1064 1065static devclass_t apm_devclass; 1066 1067DEV_DRIVER_MODULE(apm, nexus, apm_driver, apm_devclass, 1068 CDEV_MAJOR, NOMAJ, apm_cdevsw, 0, 0); 1069