apm.c revision 49380
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 1.97 1999/07/30 19:34:58 msmith Exp $ 19 */ 20 21#include "opt_devfs.h" 22 23#include <sys/param.h> 24#include <sys/systm.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/time.h> 31#include <sys/reboot.h> 32#include <sys/bus.h> 33#include <sys/select.h> 34#include <sys/poll.h> 35#include <sys/fcntl.h> 36#include <sys/proc.h> 37#include <sys/uio.h> 38#include <sys/signalvar.h> 39#include <machine/apm_bios.h> 40#include <machine/segments.h> 41#include <machine/clock.h> 42#include <vm/vm.h> 43#include <vm/vm_param.h> 44#include <vm/pmap.h> 45#include <sys/syslog.h> 46 47#include <machine/pc/bios.h> 48#include <machine/vm86.h> 49 50static int apm_display __P((int newstate)); 51static void apm_resume __P((void)); 52static int apm_bioscall(void); 53 54static u_long apm_version; 55 56#define APM_NEVENTS 16 57#define APM_NPMEV 13 58 59int apm_evindex; 60 61/* static data */ 62struct apm_softc { 63 int initialized, active, bios_busy; 64 int always_halt_cpu, slow_idle_cpu; 65 int disabled, disengaged; 66 u_int minorversion, majorversion; 67 u_int intversion, connectmode; 68 struct bios_args bios; 69 struct apmhook sc_suspend; 70 struct apmhook sc_resume; 71 struct selinfo sc_rsel; 72 int sc_flags; 73 int event_count; 74 int event_ptr; 75 struct apm_event_info event_list[APM_NEVENTS]; 76 u_char event_filter[APM_NPMEV]; 77#ifdef DEVFS 78 void *sc_devfs_token; 79#endif 80}; 81#define SCFLAG_ONORMAL 0x0000001 82#define SCFLAG_OCTL 0x0000002 83#define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL) 84 85#define APMDEV(dev) (minor(dev)&0x0f) 86#define APMDEV_NORMAL 0 87#define APMDEV_CTL 8 88 89static struct apm_softc apm_softc; 90static struct apmhook *hook[NAPM_HOOK]; /* XXX */ 91 92#define is_enabled(foo) ((foo) ? "enabled" : "disabled") 93 94/* Map version number to integer (keeps ordering of version numbers) */ 95#define INTVERSION(major, minor) ((major)*100 + (minor)) 96 97static struct callout_handle apm_timeout_ch = 98 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch); 99 100static timeout_t apm_timeout; 101static d_open_t apmopen; 102static d_close_t apmclose; 103static d_write_t apmwrite; 104static d_ioctl_t apmioctl; 105static d_poll_t apmpoll; 106 107#define CDEV_MAJOR 39 108static struct cdevsw apm_cdevsw = { 109 /* open */ apmopen, 110 /* close */ apmclose, 111 /* read */ noread, 112 /* write */ apmwrite, 113 /* ioctl */ apmioctl, 114 /* stop */ nostop, 115 /* reset */ noreset, 116 /* devtotty */ nodevtotty, 117 /* poll */ apmpoll, 118 /* mmap */ nommap, 119 /* strategy */ nostrategy, 120 /* name */ "apm", 121 /* parms */ noparms, 122 /* maj */ CDEV_MAJOR, 123 /* dump */ nodump, 124 /* psize */ nopsize, 125 /* flags */ 0, 126 /* maxio */ 0, 127 /* bmaj */ -1 128}; 129 130static int 131apm_bioscall(void) 132{ 133 struct apm_softc *sc = &apm_softc; 134 int errno = 0; 135 136 sc->bios_busy = 1; 137 if (sc->connectmode == APM_PROT32CONNECT) { 138 set_bios_selectors(&sc->bios.seg, 139 BIOSCODE_FLAG | BIOSDATA_FLAG); 140 errno = bios32(&sc->bios.r, 141 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL)); 142 } else { 143 errno = bios16(&sc->bios, NULL); 144 } 145 sc->bios_busy = 0; 146 return (errno); 147} 148 149/* enable/disable power management */ 150static int 151apm_enable_disable_pm(int enable) 152{ 153 struct apm_softc *sc = &apm_softc; 154 155 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM; 156 157 if (sc->intversion >= INTVERSION(1, 1)) 158 sc->bios.r.ebx = PMDV_ALLDEV; 159 else 160 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */ 161 sc->bios.r.ecx = enable; 162 sc->bios.r.edx = 0; 163 return (apm_bioscall()); 164} 165 166/* register driver version (APM 1.1 or later) */ 167static int 168apm_driver_version(int version) 169{ 170 struct apm_softc *sc = &apm_softc; 171 172 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION; 173 sc->bios.r.ebx = 0x0; 174 sc->bios.r.ecx = version; 175 sc->bios.r.edx = 0; 176 177 if (apm_bioscall() == 0 && sc->bios.r.eax == version) 178 return (0); 179 return (1); 180} 181 182/* engage/disengage power management (APM 1.1 or later) */ 183static int 184apm_engage_disengage_pm(int engage) 185{ 186 struct apm_softc *sc = &apm_softc; 187 188 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM; 189 sc->bios.r.ebx = PMDV_ALLDEV; 190 sc->bios.r.ecx = engage; 191 sc->bios.r.edx = 0; 192 return (apm_bioscall()); 193} 194 195/* get PM event */ 196static u_int 197apm_getevent(void) 198{ 199 struct apm_softc *sc = &apm_softc; 200 201 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT; 202 203 sc->bios.r.ebx = 0; 204 sc->bios.r.ecx = 0; 205 sc->bios.r.edx = 0; 206 if (apm_bioscall()) 207 return (PMEV_NOEVENT); 208 return (sc->bios.r.ebx & 0xffff); 209} 210 211/* suspend entire system */ 212static int 213apm_suspend_system(int state) 214{ 215 struct apm_softc *sc = &apm_softc; 216 217 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 218 sc->bios.r.ebx = PMDV_ALLDEV; 219 sc->bios.r.ecx = state; 220 sc->bios.r.edx = 0; 221 222 if (apm_bioscall()) { 223 printf("Entire system suspend failure: errcode = %d\n", 224 0xff & (sc->bios.r.eax >> 8)); 225 return 1; 226 } 227 return 0; 228} 229 230/* Display control */ 231/* 232 * Experimental implementation: My laptop machine can't handle this function 233 * If your laptop can control the display via APM, please inform me. 234 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 235 */ 236static int 237apm_display(int newstate) 238{ 239 struct apm_softc *sc = &apm_softc; 240 241 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 242 sc->bios.r.ebx = PMDV_DISP0; 243 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 244 sc->bios.r.edx = 0; 245 if (apm_bioscall()) { 246 printf("Display off failure: errcode = %d\n", 247 0xff & (sc->bios.r.eax >> 8)); 248 return 1; 249 } 250 return 0; 251} 252 253/* 254 * Turn off the entire system. 255 */ 256static void 257apm_power_off(int howto, void *junk) 258{ 259 struct apm_softc *sc = &apm_softc; 260 261 /* Not halting powering off, or not active */ 262 if (!(howto & RB_POWEROFF) || !apm_softc.active) 263 return; 264 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 265 sc->bios.r.ebx = PMDV_ALLDEV; 266 sc->bios.r.ecx = PMST_OFF; 267 sc->bios.r.edx = 0; 268 (void) apm_bioscall(); 269} 270 271/* APM Battery low handler */ 272static void 273apm_battery_low(void) 274{ 275 printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 276} 277 278/* APM hook manager */ 279static struct apmhook * 280apm_add_hook(struct apmhook **list, struct apmhook *ah) 281{ 282 int s; 283 struct apmhook *p, *prev; 284 285#ifdef APM_DEBUG 286 printf("Add hook \"%s\"\n", ah->ah_name); 287#endif 288 289 s = splhigh(); 290 if (ah == NULL) 291 panic("illegal apm_hook!"); 292 prev = NULL; 293 for (p = *list; p != NULL; prev = p, p = p->ah_next) 294 if (p->ah_order > ah->ah_order) 295 break; 296 297 if (prev == NULL) { 298 ah->ah_next = *list; 299 *list = ah; 300 } else { 301 ah->ah_next = prev->ah_next; 302 prev->ah_next = ah; 303 } 304 splx(s); 305 return ah; 306} 307 308static void 309apm_del_hook(struct apmhook **list, struct apmhook *ah) 310{ 311 int s; 312 struct apmhook *p, *prev; 313 314 s = splhigh(); 315 prev = NULL; 316 for (p = *list; p != NULL; prev = p, p = p->ah_next) 317 if (p == ah) 318 goto deleteit; 319 panic("Tried to delete unregistered apm_hook."); 320 goto nosuchnode; 321deleteit: 322 if (prev != NULL) 323 prev->ah_next = p->ah_next; 324 else 325 *list = p->ah_next; 326nosuchnode: 327 splx(s); 328} 329 330 331/* APM driver calls some functions automatically */ 332static void 333apm_execute_hook(struct apmhook *list) 334{ 335 struct apmhook *p; 336 337 for (p = list; p != NULL; p = p->ah_next) { 338#ifdef APM_DEBUG 339 printf("Execute APM hook \"%s.\"\n", p->ah_name); 340#endif 341 if ((*(p->ah_fun))(p->ah_arg)) 342 printf("Warning: APM hook \"%s\" failed", p->ah_name); 343 } 344} 345 346 347/* establish an apm hook */ 348struct apmhook * 349apm_hook_establish(int apmh, struct apmhook *ah) 350{ 351 if (apmh < 0 || apmh >= NAPM_HOOK) 352 return NULL; 353 354 return apm_add_hook(&hook[apmh], ah); 355} 356 357/* disestablish an apm hook */ 358void 359apm_hook_disestablish(int apmh, struct apmhook *ah) 360{ 361 if (apmh < 0 || apmh >= NAPM_HOOK) 362 return; 363 364 apm_del_hook(&hook[apmh], ah); 365} 366 367 368static struct timeval suspend_time; 369static struct timeval diff_time; 370 371static int 372apm_default_resume(void *arg) 373{ 374 int pl; 375 u_int second, minute, hour; 376 struct timeval resume_time, tmp_time; 377 378 /* modified for adjkerntz */ 379 pl = splsoftclock(); 380 inittodr(0); /* adjust time to RTC */ 381 microtime(&resume_time); 382 getmicrotime(&tmp_time); 383 timevaladd(&tmp_time, &diff_time); 384 385#ifdef FIXME 386 /* XXX THIS DOESN'T WORK!!! */ 387 time = tmp_time; 388#endif 389 390#ifdef APM_FIXUP_CALLTODO 391 /* Calculate the delta time suspended */ 392 timevalsub(&resume_time, &suspend_time); 393 /* Fixup the calltodo list with the delta time. */ 394 adjust_timeout_calltodo(&resume_time); 395#endif /* APM_FIXUP_CALLTODOK */ 396 splx(pl); 397#ifndef APM_FIXUP_CALLTODO 398 second = resume_time.tv_sec - suspend_time.tv_sec; 399#else /* APM_FIXUP_CALLTODO */ 400 /* 401 * We've already calculated resume_time to be the delta between 402 * the suspend and the resume. 403 */ 404 second = resume_time.tv_sec; 405#endif /* APM_FIXUP_CALLTODO */ 406 hour = second / 3600; 407 second %= 3600; 408 minute = second / 60; 409 second %= 60; 410 log(LOG_NOTICE, "resumed from suspended mode (slept %02d:%02d:%02d)\n", 411 hour, minute, second); 412 return 0; 413} 414 415static int 416apm_default_suspend(void *arg) 417{ 418 int pl; 419 420 pl = splsoftclock(); 421 microtime(&diff_time); 422 inittodr(0); 423 microtime(&suspend_time); 424 timevalsub(&diff_time, &suspend_time); 425 splx(pl); 426 return 0; 427} 428 429static int apm_record_event __P((struct apm_softc *, u_int)); 430static void apm_processevent(void); 431 432static u_int apm_op_inprog = 0; 433 434static void 435apm_lastreq_notify(void) 436{ 437 struct apm_softc *sc = &apm_softc; 438 439 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 440 sc->bios.r.ebx = PMDV_ALLDEV; 441 sc->bios.r.ecx = PMST_LASTREQNOTIFY; 442 sc->bios.r.edx = 0; 443 apm_bioscall(); 444} 445 446static int 447apm_lastreq_rejected(void) 448{ 449 struct apm_softc *sc = &apm_softc; 450 451 if (apm_op_inprog == 0) { 452 return 1; /* no operation in progress */ 453 } 454 455 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 456 sc->bios.r.ebx = PMDV_ALLDEV; 457 sc->bios.r.ecx = PMST_LASTREQREJECT; 458 sc->bios.r.edx = 0; 459 460 if (apm_bioscall()) { 461#ifdef APM_DEBUG 462 printf("apm_lastreq_rejected: failed\n"); 463#endif 464 return 1; 465 } 466 apm_op_inprog = 0; 467 return 0; 468} 469 470/* 471 * Public interface to the suspend/resume: 472 * 473 * Execute suspend and resume hook before and after sleep, respectively. 474 * 475 */ 476 477void 478apm_suspend(int state) 479{ 480 struct apm_softc *sc = &apm_softc; 481 int error; 482 483 if (!sc) 484 return; 485 486 apm_op_inprog = 0; 487 488 if (sc->initialized) { 489 error = DEVICE_SUSPEND(root_bus); 490 /* 491 * XXX Shouldn't ignore the error like this, but should 492 * instead fix the newbus code. Until that happens, 493 * I'm doing this to get suspend working again. 494 */ 495 if (error) 496 printf("DEVICE_SUSPEND error %d, ignored\n", error); 497 apm_execute_hook(hook[APM_HOOK_SUSPEND]); 498 if (apm_suspend_system(state) == 0) 499 apm_processevent(); 500 else 501 /* Failure, 'resume' the system again */ 502 apm_execute_hook(hook[APM_HOOK_RESUME]); 503 } 504} 505 506void 507apm_resume(void) 508{ 509 struct apm_softc *sc = &apm_softc; 510 511 if (!sc) 512 return; 513 514 if (sc->initialized) { 515 DEVICE_RESUME(root_bus); 516 apm_execute_hook(hook[APM_HOOK_RESUME]); 517 } 518} 519 520 521/* get APM information */ 522static int 523apm_get_info(apm_info_t aip) 524{ 525 struct apm_softc *sc = &apm_softc; 526 527 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 528 sc->bios.r.ebx = PMDV_ALLDEV; 529 sc->bios.r.ecx = 0; 530 sc->bios.r.edx = 0xffff; /* default to unknown battery time */ 531 532 if (apm_bioscall()) 533 return 1; 534 535 aip->ai_infoversion = 1; 536 aip->ai_acline = (sc->bios.r.ebx >> 8) & 0xff; 537 aip->ai_batt_stat = sc->bios.r.ebx & 0xff; 538 aip->ai_batt_life = sc->bios.r.ecx & 0xff; 539 aip->ai_major = (u_int)sc->majorversion; 540 aip->ai_minor = (u_int)sc->minorversion; 541 aip->ai_status = (u_int)sc->active; 542 sc->bios.r.edx &= 0xffff; 543 if (sc->bios.r.edx == 0xffff) /* Time is unknown */ 544 aip->ai_batt_time = -1; 545 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */ 546 aip->ai_batt_time = (sc->bios.r.edx & 0x7fff) * 60; 547 else /* Time is in seconds */ 548 aip->ai_batt_time = sc->bios.r.edx; 549 550 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 551 sc->bios.r.ebx = 0; 552 sc->bios.r.ecx = 0; 553 sc->bios.r.edx = 0; 554 if (apm_bioscall()) { 555 aip->ai_batteries = -1; /* Unknown */ 556 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 557 } else { 558 aip->ai_batteries = sc->bios.r.ebx & 0xff; 559 aip->ai_capabilities = sc->bios.r.ecx & 0xf; 560 } 561 562 bzero(aip->ai_spare, sizeof aip->ai_spare); 563 564 return 0; 565} 566 567 568/* inform APM BIOS that CPU is idle */ 569void 570apm_cpu_idle(void) 571{ 572 struct apm_softc *sc = &apm_softc; 573 574 if (sc->active) { 575 576 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE; 577 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 578 (void) apm_bioscall(); 579 } 580 /* 581 * Some APM implementation halts CPU in BIOS, whenever 582 * "CPU-idle" function are invoked, but swtch() of 583 * FreeBSD halts CPU, therefore, CPU is halted twice 584 * in the sched loop. It makes the interrupt latency 585 * terribly long and be able to cause a serious problem 586 * in interrupt processing. We prevent it by removing 587 * "hlt" operation from swtch() and managed it under 588 * APM driver. 589 */ 590 if (!sc->active || sc->always_halt_cpu) 591 __asm("hlt"); /* wait for interrupt */ 592} 593 594/* inform APM BIOS that CPU is busy */ 595void 596apm_cpu_busy(void) 597{ 598 struct apm_softc *sc = &apm_softc; 599 600 /* 601 * The APM specification says this is only necessary if your BIOS 602 * slows down the processor in the idle task, otherwise it's not 603 * necessary. 604 */ 605 if (sc->slow_idle_cpu && sc->active) { 606 607 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY; 608 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 609 apm_bioscall(); 610 } 611} 612 613 614/* 615 * APM timeout routine: 616 * 617 * This routine is automatically called by timer once per second. 618 */ 619 620static void 621apm_timeout(void *dummy) 622{ 623 struct apm_softc *sc = &apm_softc; 624 625 if (apm_op_inprog) 626 apm_lastreq_notify(); 627 628 if (!sc->bios_busy) 629 apm_processevent(); 630 631 if (sc->active == 1) 632 /* Run slightly more oftan than 1 Hz */ 633 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1 ); 634} 635 636/* enable APM BIOS */ 637static void 638apm_event_enable(void) 639{ 640 struct apm_softc *sc = &apm_softc; 641 642#ifdef APM_DEBUG 643 printf("called apm_event_enable()\n"); 644#endif 645 if (sc->initialized) { 646 sc->active = 1; 647 apm_timeout(sc); 648 } 649} 650 651/* disable APM BIOS */ 652static void 653apm_event_disable(void) 654{ 655 struct apm_softc *sc = &apm_softc; 656 657#ifdef APM_DEBUG 658 printf("called apm_event_disable()\n"); 659#endif 660 if (sc->initialized) { 661 untimeout(apm_timeout, NULL, apm_timeout_ch); 662 sc->active = 0; 663 } 664} 665 666/* halt CPU in scheduling loop */ 667static void 668apm_halt_cpu(void) 669{ 670 struct apm_softc *sc = &apm_softc; 671 672 if (sc->initialized) 673 sc->always_halt_cpu = 1; 674} 675 676/* don't halt CPU in scheduling loop */ 677static void 678apm_not_halt_cpu(void) 679{ 680 struct apm_softc *sc = &apm_softc; 681 682 if (sc->initialized) 683 sc->always_halt_cpu = 0; 684} 685 686/* device driver definitions */ 687 688/* 689 * probe for APM BIOS 690 */ 691static int 692apm_probe(device_t dev) 693{ 694#define APM_KERNBASE KERNBASE 695 struct vm86frame vmf; 696 struct apm_softc *sc = &apm_softc; 697 int disabled, flags; 698 699 if (resource_int_value("apm", 0, "disabled", &disabled) == 0 700 && disabled != 0) 701 return ENXIO; 702 703 device_set_desc(dev, "APM BIOS"); 704 705 if ( device_get_unit(dev) > 0 ) { 706 printf("apm: Only one APM driver supported.\n"); 707 return ENXIO; 708 } 709 710 if (resource_int_value("apm", 0, "flags", &flags) != 0) 711 flags = 0; 712 713 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 714 bzero(&apm_softc, sizeof(apm_softc)); 715 vmf.vmf_ah = APM_BIOS; 716 vmf.vmf_al = APM_INSTCHECK; 717 vmf.vmf_bx = 0; 718 if (vm86_intcall(APM_INT, &vmf)) 719 return ENXIO; /* APM not found */ 720 if (vmf.vmf_bx != 0x504d) { 721 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); 722 return ENXIO; 723 } 724 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { 725 printf("apm: protected mode connections are not supported\n"); 726 return ENXIO; 727 } 728 729 apm_version = vmf.vmf_ax; 730 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); 731 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); 732 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); 733 734 vmf.vmf_ah = APM_BIOS; 735 vmf.vmf_al = APM_DISCONNECT; 736 vmf.vmf_bx = 0; 737 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ 738 739 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 740 vmf.vmf_ah = APM_BIOS; 741 vmf.vmf_al = APM_PROT32CONNECT; 742 vmf.vmf_bx = 0; 743 if (vm86_intcall(APM_INT, &vmf)) { 744 printf("apm: 32-bit connection error.\n"); 745 return (ENXIO); 746 } 747 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 748 sc->bios.seg.code32.limit = 0xffff; 749 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 750 sc->bios.seg.code16.limit = 0xffff; 751 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 752 sc->bios.seg.data.limit = 0xffff; 753 sc->bios.entry = vmf.vmf_ebx; 754 sc->connectmode = APM_PROT32CONNECT; 755 } else { 756 /* use 16-bit connection */ 757 vmf.vmf_ah = APM_BIOS; 758 vmf.vmf_al = APM_PROT16CONNECT; 759 vmf.vmf_bx = 0; 760 if (vm86_intcall(APM_INT, &vmf)) { 761 printf("apm: 16-bit connection error.\n"); 762 return (ENXIO); 763 } 764 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 765 sc->bios.seg.code16.limit = 0xffff; 766 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 767 sc->bios.seg.data.limit = 0xffff; 768 sc->bios.entry = vmf.vmf_bx; 769 sc->connectmode = APM_PROT16CONNECT; 770 } 771 return(0); 772} 773 774 775/* 776 * return 0 if the user will notice and handle the event, 777 * return 1 if the kernel driver should do so. 778 */ 779static int 780apm_record_event(struct apm_softc *sc, u_int event_type) 781{ 782 struct apm_event_info *evp; 783 784 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 785 return 1; /* no user waiting */ 786 if (sc->event_count == APM_NEVENTS) 787 return 1; /* overflow */ 788 if (sc->event_filter[event_type] == 0) 789 return 1; /* not registered */ 790 evp = &sc->event_list[sc->event_ptr]; 791 sc->event_count++; 792 sc->event_ptr++; 793 sc->event_ptr %= APM_NEVENTS; 794 evp->type = event_type; 795 evp->index = ++apm_evindex; 796 selwakeup(&sc->sc_rsel); 797 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 798} 799 800/* Process APM event */ 801static void 802apm_processevent(void) 803{ 804 int apm_event; 805 struct apm_softc *sc = &apm_softc; 806 807#ifdef APM_DEBUG 808# define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 809 printf("Received APM Event: " #symbol "\n"); 810#else 811# define OPMEV_DEBUGMESSAGE(symbol) case symbol: 812#endif 813 do { 814 apm_event = apm_getevent(); 815 switch (apm_event) { 816 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 817 if (apm_op_inprog == 0) { 818 apm_op_inprog++; 819 if (apm_record_event(sc, apm_event)) { 820 apm_suspend(PMST_STANDBY); 821 } 822 } 823 break; 824 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 825 apm_lastreq_notify(); 826 if (apm_op_inprog == 0) { 827 apm_op_inprog++; 828 if (apm_record_event(sc, apm_event)) { 829 apm_suspend(PMST_SUSPEND); 830 } 831 } 832 return; /* XXX skip the rest */ 833 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 834 apm_lastreq_notify(); 835 if (apm_op_inprog == 0) { 836 apm_op_inprog++; 837 if (apm_record_event(sc, apm_event)) { 838 apm_suspend(PMST_SUSPEND); 839 } 840 } 841 return; /* XXX skip the rest */ 842 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 843 apm_suspend(PMST_SUSPEND); 844 break; 845 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 846 apm_record_event(sc, apm_event); 847 apm_resume(); 848 break; 849 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 850 apm_record_event(sc, apm_event); 851 apm_resume(); 852 break; 853 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 854 apm_record_event(sc, apm_event); 855 apm_resume(); 856 break; 857 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 858 if (apm_record_event(sc, apm_event)) { 859 apm_battery_low(); 860 apm_suspend(PMST_SUSPEND); 861 } 862 break; 863 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 864 apm_record_event(sc, apm_event); 865 break; 866 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 867 apm_record_event(sc, apm_event); 868 inittodr(0); /* adjust time to RTC */ 869 break; 870 case PMEV_NOEVENT: 871 break; 872 default: 873 printf("Unknown Original APM Event 0x%x\n", apm_event); 874 break; 875 } 876 } while (apm_event != PMEV_NOEVENT); 877} 878 879/* 880 * Attach APM: 881 * 882 * Initialize APM driver 883 */ 884 885static int 886apm_attach(device_t dev) 887{ 888 struct apm_softc *sc = &apm_softc; 889 int flags; 890 int drv_version; 891 892 if (resource_int_value("apm", 0, "flags", &flags) != 0) 893 flags = 0; 894 895 if (flags & 0x20) 896 statclock_disable = 1; 897 898 sc->initialized = 0; 899 900 /* Must be externally enabled */ 901 sc->active = 0; 902 903 /* Always call HLT in idle loop */ 904 sc->always_halt_cpu = 1; 905 906 /* print bootstrap messages */ 907#ifdef APM_DEBUG 908 printf("apm: APM BIOS version %04x\n", apm_version); 909 printf("apm: Code16 0x%08x, Data 0x%08x\n", 910 sc->bios.seg.code16.base, sc->bios.seg.data.base); 911 printf("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 912 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 913 is_enabled(!sc->disabled)); 914 printf("apm: CS_limit=0x%x, DS_limit=0x%x\n", 915 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 916#endif /* APM_DEBUG */ 917 918#if 0 919 /* 920 * XXX this may not be needed anymore 921 */ 922 if ((flags & 0x10)) { 923 if ((flags & 0xf) >= 0x2) { 924 apm_driver_version(0x102); 925 } 926 if (!apm_version && (flags & 0xf) >= 0x1) { 927 apm_driver_version(0x101); 928 } 929 } else { 930 apm_driver_version(0x102); 931 if (!apm_version) 932 apm_driver_version(0x101); 933 } 934#endif 935 /* 936 * In one test, apm bios version was 1.02; an attempt to register 937 * a 1.04 driver resulted in a 1.00 connection! Registering a 938 * 1.02 driver resulted in a 1.02 connection. 939 */ 940 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 941 for (; drv_version > 0x100; drv_version--) 942 if (apm_driver_version(drv_version) == 0) 943 break; 944 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 945 ((drv_version & 0x000f) >> 0); 946 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 947 ((apm_version & 0x0f00) >> 8); 948 949 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 950 951#ifdef APM_DEBUG 952 if (sc->intversion >= INTVERSION(1, 1)) 953 printf("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 954#endif 955 956 printf("apm: found APM BIOS v%ld.%ld, connected at v%d.%d\n", 957 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 958 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 959 sc->majorversion, sc->minorversion); 960 961#ifdef APM_DEBUG 962 printf("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 963#endif 964 965 /* enable power management */ 966 if (sc->disabled) { 967 if (apm_enable_disable_pm(1)) { 968#ifdef APM_DEBUG 969 printf("apm: *Warning* enable function failed! [%x]\n", 970 (sc->bios.r.eax >> 8) & 0xff); 971#endif 972 } 973 } 974 975 /* engage power managment (APM 1.1 or later) */ 976 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 977 if (apm_engage_disengage_pm(1)) { 978#ifdef APM_DEBUG 979 printf("apm: *Warning* engage function failed err=[%x]", 980 (sc->bios.r.eax >> 8) & 0xff); 981 printf(" (Docked or using external power?).\n"); 982#endif 983 } 984 } 985 986 /* default suspend hook */ 987 sc->sc_suspend.ah_fun = apm_default_suspend; 988 sc->sc_suspend.ah_arg = sc; 989 sc->sc_suspend.ah_name = "default suspend"; 990 sc->sc_suspend.ah_order = APM_MAX_ORDER; 991 992 /* default resume hook */ 993 sc->sc_resume.ah_fun = apm_default_resume; 994 sc->sc_resume.ah_arg = sc; 995 sc->sc_resume.ah_name = "default resume"; 996 sc->sc_resume.ah_order = APM_MIN_ORDER; 997 998 apm_hook_establish(APM_HOOK_SUSPEND, &sc->sc_suspend); 999 apm_hook_establish(APM_HOOK_RESUME , &sc->sc_resume); 1000 1001 /* Power the system off using APM */ 1002 at_shutdown_pri(apm_power_off, NULL, SHUTDOWN_FINAL, SHUTDOWN_PRI_LAST); 1003 1004 sc->initialized = 1; 1005 1006#ifdef DEVFS 1007 sc->sc_devfs_token = 1008 devfs_add_devswf(&apm_cdevsw, 0, DV_CHR, 0, 0, 0600, "apm"); 1009#endif 1010 return 0; 1011} 1012 1013static int 1014apmopen(dev_t dev, int flag, int fmt, struct proc *p) 1015{ 1016 struct apm_softc *sc = &apm_softc; 1017 int ctl = APMDEV(dev); 1018 1019 if (!sc->initialized) 1020 return (ENXIO); 1021 1022 switch (ctl) { 1023 case APMDEV_CTL: 1024 if (!(flag & FWRITE)) 1025 return EINVAL; 1026 if (sc->sc_flags & SCFLAG_OCTL) 1027 return EBUSY; 1028 sc->sc_flags |= SCFLAG_OCTL; 1029 bzero(sc->event_filter, sizeof sc->event_filter); 1030 break; 1031 case APMDEV_NORMAL: 1032 sc->sc_flags |= SCFLAG_ONORMAL; 1033 break; 1034 default: 1035 return ENXIO; 1036 break; 1037 } 1038 return 0; 1039} 1040 1041static int 1042apmclose(dev_t dev, int flag, int fmt, struct proc *p) 1043{ 1044 struct apm_softc *sc = &apm_softc; 1045 int ctl = APMDEV(dev); 1046 1047 switch (ctl) { 1048 case APMDEV_CTL: 1049 apm_lastreq_rejected(); 1050 sc->sc_flags &= ~SCFLAG_OCTL; 1051 bzero(sc->event_filter, sizeof sc->event_filter); 1052 break; 1053 case APMDEV_NORMAL: 1054 sc->sc_flags &= ~SCFLAG_ONORMAL; 1055 break; 1056 } 1057 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1058 sc->event_count = 0; 1059 sc->event_ptr = 0; 1060 } 1061 return 0; 1062} 1063 1064static int 1065apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 1066{ 1067 struct apm_softc *sc = &apm_softc; 1068 struct apm_bios_arg *args; 1069 int error = 0; 1070 int newstate; 1071 1072 if (!sc->initialized) 1073 return (ENXIO); 1074#ifdef APM_DEBUG 1075 printf("APM ioctl: cmd = 0x%x\n", cmd); 1076#endif 1077 switch (cmd) { 1078 case APMIO_SUSPEND: 1079 if (sc->active) 1080 apm_suspend(PMST_SUSPEND); 1081 else 1082 error = EINVAL; 1083 break; 1084 1085 case APMIO_STANDBY: 1086 if (sc->active) 1087 apm_suspend(PMST_STANDBY); 1088 else 1089 error = EINVAL; 1090 break; 1091 1092 case APMIO_GETINFO_OLD: 1093 { 1094 struct apm_info info; 1095 apm_info_old_t aiop; 1096 1097 if (apm_get_info(&info)) 1098 error = ENXIO; 1099 aiop = (apm_info_old_t)addr; 1100 aiop->ai_major = info.ai_major; 1101 aiop->ai_minor = info.ai_minor; 1102 aiop->ai_acline = info.ai_acline; 1103 aiop->ai_batt_stat = info.ai_batt_stat; 1104 aiop->ai_batt_life = info.ai_batt_life; 1105 aiop->ai_status = info.ai_status; 1106 } 1107 break; 1108 case APMIO_GETINFO: 1109 if (apm_get_info((apm_info_t)addr)) 1110 error = ENXIO; 1111 break; 1112 case APMIO_ENABLE: 1113 apm_event_enable(); 1114 break; 1115 case APMIO_DISABLE: 1116 apm_event_disable(); 1117 break; 1118 case APMIO_HALTCPU: 1119 apm_halt_cpu(); 1120 break; 1121 case APMIO_NOTHALTCPU: 1122 apm_not_halt_cpu(); 1123 break; 1124 case APMIO_DISPLAY: 1125 newstate = *(int *)addr; 1126 if (apm_display(newstate)) 1127 error = ENXIO; 1128 break; 1129 case APMIO_BIOS: 1130 /* XXX compatibility with the old interface */ 1131 args = (struct apm_bios_arg *)addr; 1132 sc->bios.r.eax = args->eax; 1133 sc->bios.r.ebx = args->ebx; 1134 sc->bios.r.ecx = args->ecx; 1135 sc->bios.r.edx = args->edx; 1136 sc->bios.r.esi = args->esi; 1137 sc->bios.r.edi = args->edi; 1138 if (apm_bioscall()) 1139 sc->bios.r.eax &= 0xff; 1140 args->eax = sc->bios.r.eax; 1141 args->ebx = sc->bios.r.ebx; 1142 args->ecx = sc->bios.r.ecx; 1143 args->edx = sc->bios.r.edx; 1144 args->esi = sc->bios.r.esi; 1145 args->edi = sc->bios.r.edi; 1146 break; 1147 default: 1148 error = EINVAL; 1149 break; 1150 } 1151 1152 /* for /dev/apmctl */ 1153 if (APMDEV(dev) == APMDEV_CTL) { 1154 struct apm_event_info *evp; 1155 int i; 1156 1157 error = 0; 1158 switch (cmd) { 1159 case APMIO_NEXTEVENT: 1160 if (!sc->event_count) { 1161 error = EAGAIN; 1162 } else { 1163 evp = (struct apm_event_info *)addr; 1164 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1165 i %= APM_NEVENTS; 1166 *evp = sc->event_list[i]; 1167 sc->event_count--; 1168 } 1169 break; 1170 case APMIO_REJECTLASTREQ: 1171 if (apm_lastreq_rejected()) { 1172 error = EINVAL; 1173 } 1174 break; 1175 default: 1176 error = EINVAL; 1177 break; 1178 } 1179 } 1180 1181 return error; 1182} 1183 1184static int 1185apmwrite(dev_t dev, struct uio *uio, int ioflag) 1186{ 1187 struct apm_softc *sc = &apm_softc; 1188 u_int event_type; 1189 int error; 1190 u_char enabled; 1191 1192 if (APMDEV(dev) != APMDEV_CTL) 1193 return(ENODEV); 1194 if (uio->uio_resid != sizeof(u_int)) 1195 return(E2BIG); 1196 1197 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1198 return(error); 1199 1200 if (event_type < 0 || event_type >= APM_NPMEV) 1201 return(EINVAL); 1202 1203 if (sc->event_filter[event_type] == 0) { 1204 enabled = 1; 1205 } else { 1206 enabled = 0; 1207 } 1208 sc->event_filter[event_type] = enabled; 1209#ifdef APM_DEBUG 1210 printf("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1211#endif 1212 1213 return uio->uio_resid; 1214} 1215 1216static int 1217apmpoll(dev_t dev, int events, struct proc *p) 1218{ 1219 struct apm_softc *sc = &apm_softc; 1220 int revents = 0; 1221 1222 if (events & (POLLIN | POLLRDNORM)) { 1223 if (sc->event_count) { 1224 revents |= events & (POLLIN | POLLRDNORM); 1225 } else { 1226 selrecord(p, &sc->sc_rsel); 1227 } 1228 } 1229 1230 return (revents); 1231} 1232 1233static device_method_t apm_methods[] = { 1234 /* Device interface */ 1235 DEVMETHOD(device_probe, apm_probe), 1236 DEVMETHOD(device_attach, apm_attach), 1237 1238 { 0, 0 } 1239}; 1240 1241static driver_t apm_driver = { 1242 "apm", 1243 apm_methods, 1244 1, /* no softc (XXX) */ 1245}; 1246 1247static devclass_t apm_devclass; 1248 1249DEV_DRIVER_MODULE(apm, nexus, apm_driver, apm_devclass, apm_cdevsw, 0, 0); 1250