apm.c revision 267961
1/*- 2 * APM (Advanced Power Management) BIOS Device Driver 3 * 4 * Copyright (c) 1994 UKAI, Fumitoshi. 5 * Copyright (c) 1994-1995 by HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 6 * Copyright (c) 1996 Nate Williams <nate@FreeBSD.org> 7 * Copyright (c) 1997 Poul-Henning Kamp <phk@FreeBSD.org> 8 * 9 * This software may be used, modified, copied, and distributed, in 10 * both source and binary form provided that the above copyright and 11 * these terms are retained. Under no circumstances is the author 12 * responsible for the proper functioning of this software, nor does 13 * the author assume any responsibility for damages incurred with its 14 * use. 15 * 16 * Sep, 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD) 17 */ 18 19#include <sys/cdefs.h> 20__FBSDID("$FreeBSD: head/sys/i386/bios/apm.c 267961 2014-06-27 16:33:43Z hselasky $"); 21 22#include <sys/param.h> 23#include <sys/systm.h> 24#include <sys/bus.h> 25#include <sys/conf.h> 26#include <sys/condvar.h> 27#include <sys/eventhandler.h> 28#include <sys/fcntl.h> 29#include <sys/kernel.h> 30#include <sys/kthread.h> 31#include <sys/lock.h> 32#include <sys/module.h> 33#include <sys/mutex.h> 34#include <sys/poll.h> 35#include <sys/power.h> 36#include <sys/reboot.h> 37#include <sys/selinfo.h> 38#include <sys/signalvar.h> 39#include <sys/sysctl.h> 40#include <sys/syslog.h> 41#include <sys/time.h> 42#include <sys/uio.h> 43 44#include <machine/apm_bios.h> 45#include <machine/clock.h> 46#include <machine/endian.h> 47#include <machine/pc/bios.h> 48#include <machine/cpufunc.h> 49#include <machine/segments.h> 50#include <machine/stdarg.h> 51#include <machine/vm86.h> 52 53#include <machine/bus.h> 54#include <machine/resource.h> 55#include <sys/rman.h> 56 57#include <vm/vm.h> 58#include <vm/pmap.h> 59#include <vm/vm_param.h> 60 61#include <i386/bios/apm.h> 62#include <isa/rtc.h> 63 64/* Used by the apm_saver screen saver module */ 65int apm_display(int newstate); 66struct apm_softc apm_softc; 67 68static void apm_resume(void); 69static int apm_bioscall(void); 70static int apm_check_function_supported(u_int version, u_int func); 71 72static int apm_pm_func(u_long, void*, ...); 73 74static u_long apm_version; 75 76int apm_evindex; 77 78#define SCFLAG_ONORMAL 0x0000001 79#define SCFLAG_OCTL 0x0000002 80#define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL) 81 82#define APMDEV_NORMAL 0 83#define APMDEV_CTL 1 84 85#ifdef PC98 86extern int bios32_apm98(struct bios_regs *, u_int, u_short); 87 88/* PC98's SMM definition */ 89#define APM_NECSMM_PORT 0x6b8e 90#define APM_NECSMM_PORTSZ 1 91#define APM_NECSMM_EN 0x10 92static __inline void apm_enable_smm(struct apm_softc *); 93static __inline void apm_disable_smm(struct apm_softc *); 94int apm_necsmm_addr; 95u_int32_t apm_necsmm_mask; 96#endif 97 98static struct apmhook *hook[NAPM_HOOK]; /* XXX */ 99 100#define is_enabled(foo) ((foo) ? "enabled" : "disabled") 101 102/* Map version number to integer (keeps ordering of version numbers) */ 103#define INTVERSION(major, minor) ((major)*100 + (minor)) 104 105static d_open_t apmopen; 106static d_close_t apmclose; 107static d_write_t apmwrite; 108static d_ioctl_t apmioctl; 109static d_poll_t apmpoll; 110 111static struct cdevsw apm_cdevsw = { 112 .d_version = D_VERSION, 113 .d_flags = D_NEEDGIANT, 114 .d_open = apmopen, 115 .d_close = apmclose, 116 .d_write = apmwrite, 117 .d_ioctl = apmioctl, 118 .d_poll = apmpoll, 119 .d_name = "apm", 120}; 121 122static int apm_suspend_delay = 1; 123static int apm_standby_delay = 1; 124static int apm_swab_batt_minutes = 0; 125static int apm_debug = 0; 126 127#define APM_DPRINT(args...) do { \ 128 if (apm_debug) { \ 129 printf(args); \ 130 } \ 131} while (0) 132 133SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, ""); 134SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, ""); 135SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, ""); 136 137SYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RWTUN, 138 &apm_swab_batt_minutes, 0, "Byte swap battery time value."); 139 140#ifdef PC98 141static __inline void 142apm_enable_smm(sc) 143 struct apm_softc *sc; 144{ 145 bus_space_tag_t iot = sc->sc_iot; 146 bus_space_handle_t ioh = sc->sc_ioh; 147 if (apm_necsmm_addr != 0) 148 bus_space_write_1(iot, ioh, 0, 149 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask)); 150} 151 152static __inline void 153apm_disable_smm(sc) 154 struct apm_softc *sc; 155{ 156 bus_space_tag_t iot = sc->sc_iot; 157 bus_space_handle_t ioh = sc->sc_ioh; 158 if (apm_necsmm_addr != 0) 159 bus_space_write_1(iot, ioh, 0, 160 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask)); 161} 162#endif 163 164/* 165 * return 0 if the function successfull, 166 * return 1 if the function unsuccessfull, 167 * return -1 if the function unsupported. 168 */ 169static int 170apm_bioscall(void) 171{ 172 struct apm_softc *sc = &apm_softc; 173 int errno = 0; 174 u_int apm_func = sc->bios.r.eax & 0xff; 175 176 if (!apm_check_function_supported(sc->intversion, apm_func)) { 177 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n", 178 apm_func, sc->majorversion, sc->minorversion); 179 return (-1); 180 } 181 182 sc->bios_busy = 1; 183#ifdef PC98 184 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG); 185 if (bios32_apm98(&sc->bios.r, sc->bios.entry, 186 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0) 187 return 1; 188#else 189 if (sc->connectmode == APM_PROT32CONNECT) { 190 set_bios_selectors(&sc->bios.seg, 191 BIOSCODE_FLAG | BIOSDATA_FLAG); 192 errno = bios32(&sc->bios.r, 193 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL)); 194 } else { 195 errno = bios16(&sc->bios, NULL); 196 } 197#endif 198 sc->bios_busy = 0; 199 return (errno); 200} 201 202/* check whether APM function is supported (1) or not (0). */ 203static int 204apm_check_function_supported(u_int version, u_int func) 205{ 206 /* except driver version */ 207 if (func == APM_DRVVERSION) { 208 return (1); 209 } 210#ifdef PC98 211 if (func == APM_GETPWSTATUS) { 212 return (1); 213 } 214#endif 215 216 switch (version) { 217 case INTVERSION(1, 0): 218 if (func > APM_GETPMEVENT) { 219 return (0); /* not supported */ 220 } 221 break; 222 case INTVERSION(1, 1): 223 if (func > APM_ENGAGEDISENGAGEPM && 224 func < APM_OEMFUNC) { 225 return (0); /* not supported */ 226 } 227 break; 228 case INTVERSION(1, 2): 229 break; 230 } 231 232 return (1); /* supported */ 233} 234 235/* enable/disable power management */ 236static int 237apm_enable_disable_pm(int enable) 238{ 239 struct apm_softc *sc = &apm_softc; 240 241 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM; 242 243 if (sc->intversion >= INTVERSION(1, 1)) 244 sc->bios.r.ebx = PMDV_ALLDEV; 245 else 246 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */ 247 sc->bios.r.ecx = enable; 248 sc->bios.r.edx = 0; 249 return (apm_bioscall()); 250} 251 252/* register driver version (APM 1.1 or later) */ 253static int 254apm_driver_version(int version) 255{ 256 struct apm_softc *sc = &apm_softc; 257 258 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION; 259 sc->bios.r.ebx = 0x0; 260 sc->bios.r.ecx = version; 261 sc->bios.r.edx = 0; 262 263 if (apm_bioscall() == 0 && sc->bios.r.eax == version) 264 return (0); 265 266 /* Some old BIOSes don't return the connection version in %ax. */ 267 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION)) 268 return (0); 269 270 return (1); 271} 272 273/* engage/disengage power management (APM 1.1 or later) */ 274static int 275apm_engage_disengage_pm(int engage) 276{ 277 struct apm_softc *sc = &apm_softc; 278 279 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM; 280 sc->bios.r.ebx = PMDV_ALLDEV; 281 sc->bios.r.ecx = engage; 282 sc->bios.r.edx = 0; 283 return (apm_bioscall()); 284} 285 286/* get PM event */ 287static u_int 288apm_getevent(void) 289{ 290 struct apm_softc *sc = &apm_softc; 291 292 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT; 293 294 sc->bios.r.ebx = 0; 295 sc->bios.r.ecx = 0; 296 sc->bios.r.edx = 0; 297 if (apm_bioscall()) 298 return (PMEV_NOEVENT); 299 return (sc->bios.r.ebx & 0xffff); 300} 301 302/* suspend entire system */ 303static int 304apm_suspend_system(int state) 305{ 306 struct apm_softc *sc = &apm_softc; 307 308 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 309 sc->bios.r.ebx = PMDV_ALLDEV; 310 sc->bios.r.ecx = state; 311 sc->bios.r.edx = 0; 312 313#ifdef PC98 314 apm_disable_smm(sc); 315#endif 316 if (apm_bioscall()) { 317 printf("Entire system suspend failure: errcode = %d\n", 318 0xff & (sc->bios.r.eax >> 8)); 319 return 1; 320 } 321#ifdef PC98 322 apm_enable_smm(sc); 323#endif 324 return 0; 325} 326 327/* Display control */ 328/* 329 * Experimental implementation: My laptop machine can't handle this function 330 * If your laptop can control the display via APM, please inform me. 331 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 332 */ 333int 334apm_display(int newstate) 335{ 336 struct apm_softc *sc = &apm_softc; 337 338 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 339 sc->bios.r.ebx = PMDV_DISP0; 340 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 341 sc->bios.r.edx = 0; 342 if (apm_bioscall() == 0) { 343 return 0; 344 } 345 346 /* If failed, then try to blank all display devices instead. */ 347 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 348 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */ 349 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 350 sc->bios.r.edx = 0; 351 if (apm_bioscall() == 0) { 352 return 0; 353 } 354 printf("Display off failure: errcode = %d\n", 355 0xff & (sc->bios.r.eax >> 8)); 356 return 1; 357} 358 359/* 360 * Turn off the entire system. 361 */ 362static void 363apm_power_off(void *junk, int howto) 364{ 365 struct apm_softc *sc = &apm_softc; 366 367 /* Not halting powering off, or not active */ 368 if (!(howto & RB_POWEROFF) || !apm_softc.active) 369 return; 370 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 371 sc->bios.r.ebx = PMDV_ALLDEV; 372 sc->bios.r.ecx = PMST_OFF; 373 sc->bios.r.edx = 0; 374 (void) apm_bioscall(); 375} 376 377/* APM Battery low handler */ 378static void 379apm_battery_low(void) 380{ 381 printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 382} 383 384/* APM hook manager */ 385static struct apmhook * 386apm_add_hook(struct apmhook **list, struct apmhook *ah) 387{ 388 int s; 389 struct apmhook *p, *prev; 390 391 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name); 392 393 s = splhigh(); 394 if (ah == NULL) 395 panic("illegal apm_hook!"); 396 prev = NULL; 397 for (p = *list; p != NULL; prev = p, p = p->ah_next) 398 if (p->ah_order > ah->ah_order) 399 break; 400 401 if (prev == NULL) { 402 ah->ah_next = *list; 403 *list = ah; 404 } else { 405 ah->ah_next = prev->ah_next; 406 prev->ah_next = ah; 407 } 408 splx(s); 409 return ah; 410} 411 412static void 413apm_del_hook(struct apmhook **list, struct apmhook *ah) 414{ 415 int s; 416 struct apmhook *p, *prev; 417 418 s = splhigh(); 419 prev = NULL; 420 for (p = *list; p != NULL; prev = p, p = p->ah_next) 421 if (p == ah) 422 goto deleteit; 423 panic("Tried to delete unregistered apm_hook."); 424 goto nosuchnode; 425deleteit: 426 if (prev != NULL) 427 prev->ah_next = p->ah_next; 428 else 429 *list = p->ah_next; 430nosuchnode: 431 splx(s); 432} 433 434 435/* APM driver calls some functions automatically */ 436static void 437apm_execute_hook(struct apmhook *list) 438{ 439 struct apmhook *p; 440 441 for (p = list; p != NULL; p = p->ah_next) { 442 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name); 443 if ((*(p->ah_fun))(p->ah_arg)) 444 printf("Warning: APM hook \"%s\" failed", p->ah_name); 445 } 446} 447 448 449/* establish an apm hook */ 450struct apmhook * 451apm_hook_establish(int apmh, struct apmhook *ah) 452{ 453 if (apmh < 0 || apmh >= NAPM_HOOK) 454 return NULL; 455 456 return apm_add_hook(&hook[apmh], ah); 457} 458 459/* disestablish an apm hook */ 460void 461apm_hook_disestablish(int apmh, struct apmhook *ah) 462{ 463 if (apmh < 0 || apmh >= NAPM_HOOK) 464 return; 465 466 apm_del_hook(&hook[apmh], ah); 467} 468 469static int apm_record_event(struct apm_softc *, u_int); 470static void apm_processevent(void); 471 472static u_int apm_op_inprog = 0; 473 474static void 475apm_do_suspend(void) 476{ 477 struct apm_softc *sc = &apm_softc; 478 int error; 479 480 if (sc == NULL || sc->initialized == 0) 481 return; 482 483 apm_op_inprog = 0; 484 sc->suspends = sc->suspend_countdown = 0; 485 486 EVENTHANDLER_INVOKE(power_suspend); 487 488 /* 489 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since 490 * non-MPSAFE drivers need this. 491 */ 492 mtx_lock(&Giant); 493 error = DEVICE_SUSPEND(root_bus); 494 if (error) 495 goto backout; 496 497 apm_execute_hook(hook[APM_HOOK_SUSPEND]); 498 if (apm_suspend_system(PMST_SUSPEND) == 0) { 499 sc->suspending = 1; 500 apm_processevent(); 501 mtx_unlock(&Giant); 502 return; 503 } 504 505 /* Failure, 'resume' the system again */ 506 apm_execute_hook(hook[APM_HOOK_RESUME]); 507 DEVICE_RESUME(root_bus); 508backout: 509 mtx_unlock(&Giant); 510 EVENTHANDLER_INVOKE(power_resume); 511} 512 513static void 514apm_do_standby(void) 515{ 516 struct apm_softc *sc = &apm_softc; 517 518 if (sc == NULL || sc->initialized == 0) 519 return; 520 521 apm_op_inprog = 0; 522 sc->standbys = sc->standby_countdown = 0; 523 524 /* 525 * As far as standby, we don't need to execute 526 * all of suspend hooks. 527 */ 528 if (apm_suspend_system(PMST_STANDBY) == 0) 529 apm_processevent(); 530 return; 531} 532 533static void 534apm_lastreq_notify(void) 535{ 536 struct apm_softc *sc = &apm_softc; 537 538 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 539 sc->bios.r.ebx = PMDV_ALLDEV; 540 sc->bios.r.ecx = PMST_LASTREQNOTIFY; 541 sc->bios.r.edx = 0; 542 apm_bioscall(); 543} 544 545static int 546apm_lastreq_rejected(void) 547{ 548 struct apm_softc *sc = &apm_softc; 549 550 if (apm_op_inprog == 0) { 551 return 1; /* no operation in progress */ 552 } 553 554 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 555 sc->bios.r.ebx = PMDV_ALLDEV; 556 sc->bios.r.ecx = PMST_LASTREQREJECT; 557 sc->bios.r.edx = 0; 558 559 if (apm_bioscall()) { 560 APM_DPRINT("apm_lastreq_rejected: failed\n"); 561 return 1; 562 } 563 apm_op_inprog = 0; 564 return 0; 565} 566 567/* 568 * Public interface to the suspend/resume: 569 * 570 * Execute suspend and resume hook before and after sleep, respectively. 571 * 572 */ 573 574void 575apm_suspend(int state) 576{ 577 struct apm_softc *sc = &apm_softc; 578 579 if (sc == NULL || sc->initialized == 0) 580 return; 581 582 switch (state) { 583 case PMST_SUSPEND: 584 if (sc->suspends) 585 return; 586 sc->suspends++; 587 sc->suspend_countdown = apm_suspend_delay; 588 break; 589 case PMST_STANDBY: 590 if (sc->standbys) 591 return; 592 sc->standbys++; 593 sc->standby_countdown = apm_standby_delay; 594 break; 595 default: 596 printf("apm_suspend: Unknown Suspend state 0x%x\n", state); 597 return; 598 } 599 600 apm_op_inprog++; 601 apm_lastreq_notify(); 602} 603 604static void 605apm_resume(void) 606{ 607 struct apm_softc *sc = &apm_softc; 608 609 if (sc == NULL || sc->initialized == 0 || sc->suspending == 0) 610 return; 611 612 sc->suspending = 0; 613 apm_execute_hook(hook[APM_HOOK_RESUME]); 614 mtx_lock(&Giant); 615 DEVICE_RESUME(root_bus); 616 mtx_unlock(&Giant); 617 EVENTHANDLER_INVOKE(power_resume); 618} 619 620 621/* get power status per battery */ 622static int 623apm_get_pwstatus(apm_pwstatus_t app) 624{ 625 struct apm_softc *sc = &apm_softc; 626 627 if (app->ap_device != PMDV_ALLDEV && 628 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL)) 629 return 1; 630 631 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 632 sc->bios.r.ebx = app->ap_device; 633 sc->bios.r.ecx = 0; 634 sc->bios.r.edx = 0xffff; /* default to unknown battery time */ 635 636 if (apm_bioscall()) 637 return 1; 638 639 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff; 640 app->ap_batt_stat = sc->bios.r.ebx & 0xff; 641 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff; 642 app->ap_batt_life = sc->bios.r.ecx & 0xff; 643 sc->bios.r.edx &= 0xffff; 644 if (apm_swab_batt_minutes) 645 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000; 646 if (sc->bios.r.edx == 0xffff) /* Time is unknown */ 647 app->ap_batt_time = -1; 648 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */ 649 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60; 650 else /* Time is in seconds */ 651 app->ap_batt_time = sc->bios.r.edx; 652 653 return 0; 654} 655 656 657/* get APM information */ 658static int 659apm_get_info(apm_info_t aip) 660{ 661 struct apm_softc *sc = &apm_softc; 662 struct apm_pwstatus aps; 663 664 bzero(&aps, sizeof(aps)); 665 aps.ap_device = PMDV_ALLDEV; 666 if (apm_get_pwstatus(&aps)) 667 return 1; 668 669 aip->ai_infoversion = 1; 670 aip->ai_acline = aps.ap_acline; 671 aip->ai_batt_stat = aps.ap_batt_stat; 672 aip->ai_batt_life = aps.ap_batt_life; 673 aip->ai_batt_time = aps.ap_batt_time; 674 aip->ai_major = (u_int)sc->majorversion; 675 aip->ai_minor = (u_int)sc->minorversion; 676 aip->ai_status = (u_int)sc->active; 677 678 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 679 sc->bios.r.ebx = 0; 680 sc->bios.r.ecx = 0; 681 sc->bios.r.edx = 0; 682 if (apm_bioscall()) { 683 aip->ai_batteries = 0xffffffff; /* Unknown */ 684 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 685 } else { 686 aip->ai_batteries = sc->bios.r.ebx & 0xff; 687 aip->ai_capabilities = sc->bios.r.ecx & 0xff; 688 } 689 690 bzero(aip->ai_spare, sizeof aip->ai_spare); 691 692 return 0; 693} 694 695 696/* inform APM BIOS that CPU is idle */ 697void 698apm_cpu_idle(void) 699{ 700 struct apm_softc *sc = &apm_softc; 701 702 if (sc->active) { 703 704 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE; 705 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 706 (void) apm_bioscall(); 707 } 708 /* 709 * Some APM implementation halts CPU in BIOS, whenever 710 * "CPU-idle" function are invoked, but swtch() of 711 * FreeBSD halts CPU, therefore, CPU is halted twice 712 * in the sched loop. It makes the interrupt latency 713 * terribly long and be able to cause a serious problem 714 * in interrupt processing. We prevent it by removing 715 * "hlt" operation from swtch() and managed it under 716 * APM driver. 717 */ 718 if (!sc->active || sc->always_halt_cpu) 719 halt(); /* wait for interrupt */ 720} 721 722/* inform APM BIOS that CPU is busy */ 723void 724apm_cpu_busy(void) 725{ 726 struct apm_softc *sc = &apm_softc; 727 728 /* 729 * The APM specification says this is only necessary if your BIOS 730 * slows down the processor in the idle task, otherwise it's not 731 * necessary. 732 */ 733 if (sc->slow_idle_cpu && sc->active) { 734 735 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY; 736 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 737 apm_bioscall(); 738 } 739} 740 741 742/* 743 * APM thread loop. 744 * 745 * This routine wakes up from time to time to deal with delaying the 746 * suspend of the system, or other events. 747 */ 748static void 749apm_event_thread(void *arg) 750{ 751 struct apm_softc *sc = &apm_softc; 752 753 sc->running = 1; 754 while (sc->active) { 755 if (apm_op_inprog) 756 apm_lastreq_notify(); 757 if (sc->standbys && sc->standby_countdown-- <= 0) 758 apm_do_standby(); 759 if (sc->suspends && sc->suspend_countdown-- <= 0) 760 apm_do_suspend(); 761 if (!sc->bios_busy) 762 apm_processevent(); 763 mtx_lock(&sc->mtx); 764 cv_timedwait(&sc->cv, &sc->mtx, 10 * hz / 9); 765 mtx_unlock(&sc->mtx); 766 } 767 sc->running = 0; 768 kproc_exit(0); 769} 770 771/* enable APM BIOS */ 772static void 773apm_event_enable(void) 774{ 775 struct apm_softc *sc = &apm_softc; 776 777 APM_DPRINT("called apm_event_enable()\n"); 778 779 if (sc == NULL || sc->initialized == 0) 780 return; 781 782 /* Start the thread */ 783 sc->active = 1; 784 if (kproc_create(apm_event_thread, sc, &sc->event_thread, 0, 0, 785 "apm worker")) 786 panic("Cannot create apm worker thread"); 787 788 return; 789} 790 791/* disable APM BIOS */ 792static void 793apm_event_disable(void) 794{ 795 struct apm_softc *sc = &apm_softc; 796 797 APM_DPRINT("called apm_event_disable()\n"); 798 799 if (sc == NULL || sc->initialized == 0) 800 return; 801 802 mtx_lock(&sc->mtx); 803 sc->active = 0; 804 while (sc->running) { 805 cv_broadcast(&sc->cv); 806 msleep(sc->event_thread, &sc->mtx, PWAIT, "apmdie", 0); 807 } 808 mtx_unlock(&sc->mtx); 809 sc->event_thread = NULL; 810 return; 811} 812 813/* halt CPU in scheduling loop */ 814static void 815apm_halt_cpu(void) 816{ 817 struct apm_softc *sc = &apm_softc; 818 819 if (sc == NULL || sc->initialized == 0) 820 return; 821 822 sc->always_halt_cpu = 1; 823 824 return; 825} 826 827/* don't halt CPU in scheduling loop */ 828static void 829apm_not_halt_cpu(void) 830{ 831 struct apm_softc *sc = &apm_softc; 832 833 if (sc == NULL || sc->initialized == 0) 834 return; 835 836 sc->always_halt_cpu = 0; 837 838 return; 839} 840 841/* device driver definitions */ 842 843/* 844 * Module event 845 */ 846 847static int 848apm_modevent(struct module *mod, int event, void *junk) 849{ 850 851 switch (event) { 852 case MOD_LOAD: 853 if (!cold) 854 return (EPERM); 855 break; 856 case MOD_UNLOAD: 857 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM) 858 return (EBUSY); 859 break; 860 default: 861 break; 862 } 863 864 return (0); 865} 866 867/* 868 * Create "connection point" 869 */ 870static void 871apm_identify(driver_t *driver, device_t parent) 872{ 873 device_t child; 874 875 if (!cold) { 876 printf("Don't load this driver from userland!!\n"); 877 return; 878 } 879 880 if (resource_disabled("apm", 0)) 881 return; 882 883 child = BUS_ADD_CHILD(parent, 0, "apm", 0); 884 if (child == NULL) 885 panic("apm_identify"); 886} 887 888/* 889 * probe for APM BIOS 890 */ 891static int 892apm_probe(device_t dev) 893{ 894#define APM_KERNBASE KERNBASE 895 struct vm86frame vmf; 896 struct apm_softc *sc = &apm_softc; 897#ifdef PC98 898 int rid; 899#endif 900 901 device_set_desc(dev, "APM BIOS"); 902 if (device_get_unit(dev) > 0) { 903 printf("apm: Only one APM driver supported.\n"); 904 return ENXIO; 905 } 906 907 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 908 power_pm_get_type() != POWER_PM_TYPE_APM) { 909 printf("apm: Other PM system enabled.\n"); 910 return ENXIO; 911 } 912 913 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 914 bzero(&apm_softc, sizeof(apm_softc)); 915 vmf.vmf_ah = APM_BIOS; 916 vmf.vmf_al = APM_INSTCHECK; 917 vmf.vmf_bx = 0; 918 if (vm86_intcall(APM_INT, &vmf)) 919 return ENXIO; /* APM not found */ 920 if (vmf.vmf_bx != 0x504d) { 921 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); 922 return ENXIO; 923 } 924 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { 925 printf("apm: protected mode connections are not supported\n"); 926 return ENXIO; 927 } 928 929 apm_version = vmf.vmf_ax; 930 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); 931 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); 932 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); 933 934 vmf.vmf_ah = APM_BIOS; 935 vmf.vmf_al = APM_DISCONNECT; 936 vmf.vmf_bx = 0; 937 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ 938 939#ifdef PC98 940 /* PC98 have bogos APM 32bit BIOS */ 941 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0) 942 return ENXIO; 943 rid = 0; 944 bus_set_resource(dev, SYS_RES_IOPORT, rid, 945 APM_NECSMM_PORT, APM_NECSMM_PORTSZ); 946 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 947 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 948 if (sc->sc_res == NULL) { 949 printf("apm: cannot open NEC smm device\n"); 950 return ENXIO; 951 } 952 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res); 953 954 vmf.vmf_ah = APM_BIOS; 955 vmf.vmf_al = APM_PROT32CONNECT; 956 vmf.vmf_bx = 0; 957 if (vm86_intcall(APM_INT, &vmf)) { 958 printf("apm: 32-bit connection error.\n"); 959 return (ENXIO); 960 } 961 962 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 963 sc->bios.seg.code32.limit = 0xffff; 964 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 965 sc->bios.seg.code16.limit = 0xffff; 966 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 967 sc->bios.seg.data.limit = 0xffff; 968 sc->bios.entry = vmf.vmf_ebx; 969 sc->connectmode = APM_PROT32CONNECT; 970#else 971 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 972 vmf.vmf_ah = APM_BIOS; 973 vmf.vmf_al = APM_PROT32CONNECT; 974 vmf.vmf_bx = 0; 975 if (vm86_intcall(APM_INT, &vmf)) { 976 printf("apm: 32-bit connection error.\n"); 977 return (ENXIO); 978 } 979 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 980 sc->bios.seg.code32.limit = 0xffff; 981 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 982 sc->bios.seg.code16.limit = 0xffff; 983 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 984 sc->bios.seg.data.limit = 0xffff; 985 sc->bios.entry = vmf.vmf_ebx; 986 sc->connectmode = APM_PROT32CONNECT; 987 } else { 988 /* use 16-bit connection */ 989 vmf.vmf_ah = APM_BIOS; 990 vmf.vmf_al = APM_PROT16CONNECT; 991 vmf.vmf_bx = 0; 992 if (vm86_intcall(APM_INT, &vmf)) { 993 printf("apm: 16-bit connection error.\n"); 994 return (ENXIO); 995 } 996 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 997 sc->bios.seg.code16.limit = 0xffff; 998 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 999 sc->bios.seg.data.limit = 0xffff; 1000 sc->bios.entry = vmf.vmf_bx; 1001 sc->connectmode = APM_PROT16CONNECT; 1002 } 1003#endif 1004 return(0); 1005} 1006 1007 1008/* 1009 * return 0 if the user will notice and handle the event, 1010 * return 1 if the kernel driver should do so. 1011 */ 1012static int 1013apm_record_event(struct apm_softc *sc, u_int event_type) 1014{ 1015 struct apm_event_info *evp; 1016 1017 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 1018 return 1; /* no user waiting */ 1019 if (sc->event_count == APM_NEVENTS) 1020 return 1; /* overflow */ 1021 if (sc->event_filter[event_type] == 0) 1022 return 1; /* not registered */ 1023 evp = &sc->event_list[sc->event_ptr]; 1024 sc->event_count++; 1025 sc->event_ptr++; 1026 sc->event_ptr %= APM_NEVENTS; 1027 evp->type = event_type; 1028 evp->index = ++apm_evindex; 1029 selwakeuppri(&sc->sc_rsel, PZERO); 1030 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 1031} 1032 1033/* Power profile */ 1034static void 1035apm_power_profile(struct apm_softc *sc) 1036{ 1037 int state; 1038 struct apm_info info; 1039 static int apm_acline = 0; 1040 1041 if (apm_get_info(&info)) 1042 return; 1043 1044 if (apm_acline != info.ai_acline) { 1045 apm_acline = info.ai_acline; 1046 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY; 1047 power_profile_set_state(state); 1048 } 1049} 1050 1051/* Process APM event */ 1052static void 1053apm_processevent(void) 1054{ 1055 int apm_event; 1056 struct apm_softc *sc = &apm_softc; 1057 1058#define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 1059 APM_DPRINT("Received APM Event: " #symbol "\n"); 1060 1061 do { 1062 apm_event = apm_getevent(); 1063 switch (apm_event) { 1064 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 1065 if (apm_op_inprog == 0) { 1066 apm_op_inprog++; 1067 if (apm_record_event(sc, apm_event)) { 1068 apm_suspend(PMST_STANDBY); 1069 } 1070 } 1071 break; 1072 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); 1073 if (apm_op_inprog == 0) { 1074 apm_op_inprog++; 1075 if (apm_record_event(sc, apm_event)) { 1076 apm_suspend(PMST_STANDBY); 1077 } 1078 } 1079 break; 1080 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 1081 apm_lastreq_notify(); 1082 if (apm_op_inprog == 0) { 1083 apm_op_inprog++; 1084 if (apm_record_event(sc, apm_event)) { 1085 apm_do_suspend(); 1086 } 1087 } 1088 return; /* XXX skip the rest */ 1089 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 1090 apm_lastreq_notify(); 1091 if (apm_op_inprog == 0) { 1092 apm_op_inprog++; 1093 if (apm_record_event(sc, apm_event)) { 1094 apm_do_suspend(); 1095 } 1096 } 1097 return; /* XXX skip the rest */ 1098 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 1099 apm_do_suspend(); 1100 break; 1101 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 1102 apm_record_event(sc, apm_event); 1103 apm_resume(); 1104 break; 1105 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 1106 apm_record_event(sc, apm_event); 1107 apm_resume(); 1108 break; 1109 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 1110 apm_record_event(sc, apm_event); 1111 break; 1112 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 1113 if (apm_record_event(sc, apm_event)) { 1114 apm_battery_low(); 1115 apm_suspend(PMST_SUSPEND); 1116 } 1117 break; 1118 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 1119 apm_record_event(sc, apm_event); 1120 apm_power_profile(sc); 1121 break; 1122 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 1123 apm_record_event(sc, apm_event); 1124 inittodr(0); /* adjust time to RTC */ 1125 break; 1126 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); 1127 apm_record_event(sc, apm_event); 1128 apm_power_profile(sc); 1129 break; 1130 case PMEV_NOEVENT: 1131 break; 1132 default: 1133 printf("Unknown Original APM Event 0x%x\n", apm_event); 1134 break; 1135 } 1136 } while (apm_event != PMEV_NOEVENT); 1137#ifdef PC98 1138 apm_disable_smm(sc); 1139#endif 1140} 1141 1142/* 1143 * Attach APM: 1144 * 1145 * Initialize APM driver 1146 */ 1147 1148static int 1149apm_attach(device_t dev) 1150{ 1151 struct apm_softc *sc = &apm_softc; 1152 int drv_version; 1153#ifdef PC98 1154 int rid; 1155#endif 1156 mtx_init(&sc->mtx, device_get_nameunit(dev), "apm", MTX_DEF); 1157 cv_init(&sc->cv, "cbb cv"); 1158 1159#ifndef PC98 1160 if (device_get_flags(dev) & 0x20) 1161 atrtcclock_disable = 1; 1162#endif 1163 1164 sc->initialized = 0; 1165 1166 /* Must be externally enabled */ 1167 sc->active = 0; 1168 1169 /* Always call HLT in idle loop */ 1170 sc->always_halt_cpu = 1; 1171 1172 getenv_int("debug.apm_debug", &apm_debug); 1173 1174 /* print bootstrap messages */ 1175 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version); 1176 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n", 1177 sc->bios.seg.code16.base, sc->bios.seg.data.base); 1178 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 1179 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 1180 is_enabled(!sc->disabled)); 1181 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n", 1182 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 1183 1184#ifdef PC98 1185 rid = 0; 1186 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1187 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 1188 if (sc->sc_res == NULL) 1189 panic("%s: counldn't map I/O ports", device_get_name(dev)); 1190 sc->sc_iot = rman_get_bustag(sc->sc_res); 1191 sc->sc_ioh = rman_get_bushandle(sc->sc_res); 1192 1193 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110) 1194 apm_necsmm_addr = APM_NECSMM_PORT; 1195 else 1196 apm_necsmm_addr = 0; 1197 apm_necsmm_mask = ~APM_NECSMM_EN; 1198#endif /* PC98 */ 1199 1200 /* 1201 * In one test, apm bios version was 1.02; an attempt to register 1202 * a 1.04 driver resulted in a 1.00 connection! Registering a 1203 * 1.02 driver resulted in a 1.02 connection. 1204 */ 1205 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 1206 for (; drv_version > 0x100; drv_version--) 1207 if (apm_driver_version(drv_version) == 0) 1208 break; 1209 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 1210 ((drv_version & 0x000f) >> 0); 1211 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 1212 ((apm_version & 0x0f00) >> 8); 1213 1214 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1215 1216 if (sc->intversion >= INTVERSION(1, 1)) 1217 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1218 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n", 1219 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 1220 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 1221 sc->majorversion, sc->minorversion); 1222 1223 1224 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1225 /* enable power management */ 1226 if (sc->disabled) { 1227 if (apm_enable_disable_pm(1)) { 1228 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n", 1229 (sc->bios.r.eax >> 8) & 0xff); 1230 } 1231 } 1232 1233 /* engage power managment (APM 1.1 or later) */ 1234 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1235 if (apm_engage_disengage_pm(1)) { 1236 APM_DPRINT("apm: *Warning* engage function failed err=[%x]", 1237 (sc->bios.r.eax >> 8) & 0xff); 1238 APM_DPRINT(" (Docked or using external power?).\n"); 1239 } 1240 } 1241 1242 /* Power the system off using APM */ 1243 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 1244 SHUTDOWN_PRI_LAST); 1245 1246 /* Register APM again to pass the correct argument of pm_func. */ 1247 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc); 1248 1249 sc->initialized = 1; 1250 sc->suspending = 0; 1251 sc->running = 0; 1252 1253 make_dev(&apm_cdevsw, APMDEV_NORMAL, 1254 UID_ROOT, GID_OPERATOR, 0664, "apm"); 1255 make_dev(&apm_cdevsw, APMDEV_CTL, 1256 UID_ROOT, GID_OPERATOR, 0660, "apmctl"); 1257 return 0; 1258} 1259 1260static int 1261apmopen(struct cdev *dev, int flag, int fmt, struct thread *td) 1262{ 1263 struct apm_softc *sc = &apm_softc; 1264 1265 if (sc == NULL || sc->initialized == 0) 1266 return (ENXIO); 1267 1268 switch (dev2unit(dev)) { 1269 case APMDEV_CTL: 1270 if (!(flag & FWRITE)) 1271 return EINVAL; 1272 if (sc->sc_flags & SCFLAG_OCTL) 1273 return EBUSY; 1274 sc->sc_flags |= SCFLAG_OCTL; 1275 bzero(sc->event_filter, sizeof sc->event_filter); 1276 break; 1277 case APMDEV_NORMAL: 1278 sc->sc_flags |= SCFLAG_ONORMAL; 1279 break; 1280 } 1281 return 0; 1282} 1283 1284static int 1285apmclose(struct cdev *dev, int flag, int fmt, struct thread *td) 1286{ 1287 struct apm_softc *sc = &apm_softc; 1288 1289 switch (dev2unit(dev)) { 1290 case APMDEV_CTL: 1291 apm_lastreq_rejected(); 1292 sc->sc_flags &= ~SCFLAG_OCTL; 1293 bzero(sc->event_filter, sizeof sc->event_filter); 1294 break; 1295 case APMDEV_NORMAL: 1296 sc->sc_flags &= ~SCFLAG_ONORMAL; 1297 break; 1298 } 1299 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1300 sc->event_count = 0; 1301 sc->event_ptr = 0; 1302 } 1303 return 0; 1304} 1305 1306static int 1307apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1308{ 1309 struct apm_softc *sc = &apm_softc; 1310 struct apm_bios_arg *args; 1311 int error = 0; 1312 int ret; 1313 int newstate; 1314 1315 if (sc == NULL || sc->initialized == 0) 1316 return (ENXIO); 1317 1318 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd); 1319 switch (cmd) { 1320 case APMIO_SUSPEND: 1321 if (!(flag & FWRITE)) 1322 return (EPERM); 1323 if (sc->active) 1324 apm_suspend(PMST_SUSPEND); 1325 else 1326 error = EINVAL; 1327 break; 1328 1329 case APMIO_STANDBY: 1330 if (!(flag & FWRITE)) 1331 return (EPERM); 1332 if (sc->active) 1333 apm_suspend(PMST_STANDBY); 1334 else 1335 error = EINVAL; 1336 break; 1337 1338 case APMIO_GETINFO_OLD: 1339 { 1340 struct apm_info info; 1341 apm_info_old_t aiop; 1342 1343 if (apm_get_info(&info)) 1344 error = ENXIO; 1345 aiop = (apm_info_old_t)addr; 1346 aiop->ai_major = info.ai_major; 1347 aiop->ai_minor = info.ai_minor; 1348 aiop->ai_acline = info.ai_acline; 1349 aiop->ai_batt_stat = info.ai_batt_stat; 1350 aiop->ai_batt_life = info.ai_batt_life; 1351 aiop->ai_status = info.ai_status; 1352 } 1353 break; 1354 case APMIO_GETINFO: 1355 if (apm_get_info((apm_info_t)addr)) 1356 error = ENXIO; 1357 break; 1358 case APMIO_GETPWSTATUS: 1359 if (apm_get_pwstatus((apm_pwstatus_t)addr)) 1360 error = ENXIO; 1361 break; 1362 case APMIO_ENABLE: 1363 if (!(flag & FWRITE)) 1364 return (EPERM); 1365 apm_event_enable(); 1366 break; 1367 case APMIO_DISABLE: 1368 if (!(flag & FWRITE)) 1369 return (EPERM); 1370 apm_event_disable(); 1371 break; 1372 case APMIO_HALTCPU: 1373 if (!(flag & FWRITE)) 1374 return (EPERM); 1375 apm_halt_cpu(); 1376 break; 1377 case APMIO_NOTHALTCPU: 1378 if (!(flag & FWRITE)) 1379 return (EPERM); 1380 apm_not_halt_cpu(); 1381 break; 1382 case APMIO_DISPLAY: 1383 if (!(flag & FWRITE)) 1384 return (EPERM); 1385 newstate = *(int *)addr; 1386 if (apm_display(newstate)) 1387 error = ENXIO; 1388 break; 1389 case APMIO_BIOS: 1390 if (!(flag & FWRITE)) 1391 return (EPERM); 1392 /* XXX compatibility with the old interface */ 1393 args = (struct apm_bios_arg *)addr; 1394#ifdef PC98 1395 if (((args->eax >> 8) & 0xff) == 0x53) { 1396 sc->bios.r.eax = args->eax & ~0xffff; 1397 sc->bios.r.eax |= APM_BIOS << 8; 1398 switch (args->eax & 0xff) { 1399 case 0x0a: 1400 sc->bios.r.eax |= APM_GETPWSTATUS; 1401 break; 1402 case 0x0e: 1403 sc->bios.r.eax |= APM_DRVVERSION; 1404 break; 1405 default: 1406 sc->bios.r.eax |= args->eax & 0xff; 1407 break; 1408 } 1409 } else 1410#endif 1411 sc->bios.r.eax = args->eax; 1412 sc->bios.r.ebx = args->ebx; 1413 sc->bios.r.ecx = args->ecx; 1414 sc->bios.r.edx = args->edx; 1415 sc->bios.r.esi = args->esi; 1416 sc->bios.r.edi = args->edi; 1417 if ((ret = apm_bioscall())) { 1418 /* 1419 * Return code 1 means bios call was unsuccessful. 1420 * Error code is stored in %ah. 1421 * Return code -1 means bios call was unsupported 1422 * in the APM BIOS version. 1423 */ 1424 if (ret == -1) { 1425 error = EINVAL; 1426 } 1427 } else { 1428 /* 1429 * Return code 0 means bios call was successful. 1430 * We need only %al and can discard %ah. 1431 */ 1432 sc->bios.r.eax &= 0xff; 1433 } 1434 args->eax = sc->bios.r.eax; 1435 args->ebx = sc->bios.r.ebx; 1436 args->ecx = sc->bios.r.ecx; 1437 args->edx = sc->bios.r.edx; 1438 args->esi = sc->bios.r.esi; 1439 args->edi = sc->bios.r.edi; 1440 break; 1441 default: 1442 error = EINVAL; 1443 break; 1444 } 1445 1446 /* for /dev/apmctl */ 1447 if (dev2unit(dev) == APMDEV_CTL) { 1448 struct apm_event_info *evp; 1449 int i; 1450 1451 error = 0; 1452 switch (cmd) { 1453 case APMIO_NEXTEVENT: 1454 if (!sc->event_count) { 1455 error = EAGAIN; 1456 } else { 1457 evp = (struct apm_event_info *)addr; 1458 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1459 i %= APM_NEVENTS; 1460 *evp = sc->event_list[i]; 1461 sc->event_count--; 1462 } 1463 break; 1464 case APMIO_REJECTLASTREQ: 1465 if (apm_lastreq_rejected()) { 1466 error = EINVAL; 1467 } 1468 break; 1469 default: 1470 error = EINVAL; 1471 break; 1472 } 1473 } 1474 1475 return error; 1476} 1477 1478static int 1479apmwrite(struct cdev *dev, struct uio *uio, int ioflag) 1480{ 1481 struct apm_softc *sc = &apm_softc; 1482 u_int event_type; 1483 int error; 1484 u_char enabled; 1485 1486 if (dev2unit(dev) != APMDEV_CTL) 1487 return(ENODEV); 1488 if (uio->uio_resid != sizeof(u_int)) 1489 return(E2BIG); 1490 1491 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1492 return(error); 1493 1494 if (event_type < 0 || event_type >= APM_NPMEV) 1495 return(EINVAL); 1496 1497 if (sc->event_filter[event_type] == 0) { 1498 enabled = 1; 1499 } else { 1500 enabled = 0; 1501 } 1502 sc->event_filter[event_type] = enabled; 1503 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1504 1505 return uio->uio_resid; 1506} 1507 1508static int 1509apmpoll(struct cdev *dev, int events, struct thread *td) 1510{ 1511 struct apm_softc *sc = &apm_softc; 1512 int revents = 0; 1513 1514 if (events & (POLLIN | POLLRDNORM)) { 1515 if (sc->event_count) { 1516 revents |= events & (POLLIN | POLLRDNORM); 1517 } else { 1518 selrecord(td, &sc->sc_rsel); 1519 } 1520 } 1521 1522 return (revents); 1523} 1524 1525static device_method_t apm_methods[] = { 1526 /* Device interface */ 1527 DEVMETHOD(device_identify, apm_identify), 1528 DEVMETHOD(device_probe, apm_probe), 1529 DEVMETHOD(device_attach, apm_attach), 1530 1531 { 0, 0 } 1532}; 1533 1534static driver_t apm_driver = { 1535 "apm", 1536 apm_methods, 1537 1, /* no softc (XXX) */ 1538}; 1539 1540static devclass_t apm_devclass; 1541 1542DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0); 1543MODULE_VERSION(apm, 1); 1544 1545static int 1546apm_pm_func(u_long cmd, void *arg, ...) 1547{ 1548 int state, apm_state; 1549 int error; 1550 va_list ap; 1551 1552 error = 0; 1553 switch (cmd) { 1554 case POWER_CMD_SUSPEND: 1555 va_start(ap, arg); 1556 state = va_arg(ap, int); 1557 va_end(ap); 1558 1559 switch (state) { 1560 case POWER_SLEEP_STATE_STANDBY: 1561 apm_state = PMST_STANDBY; 1562 break; 1563 case POWER_SLEEP_STATE_SUSPEND: 1564 case POWER_SLEEP_STATE_HIBERNATE: 1565 apm_state = PMST_SUSPEND; 1566 break; 1567 default: 1568 error = EINVAL; 1569 goto out; 1570 } 1571 1572 apm_suspend(apm_state); 1573 break; 1574 1575 default: 1576 error = EINVAL; 1577 goto out; 1578 } 1579 1580out: 1581 return (error); 1582} 1583 1584static void 1585apm_pm_register(void *arg) 1586{ 1587 1588 if (!resource_disabled("apm", 0)) 1589 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL); 1590} 1591 1592SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0); 1593