apm.c revision 158922
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 158922 2006-05-25 23:06:38Z imp $"); 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 63/* Used by the apm_saver screen saver module */ 64int apm_display(int newstate); 65struct apm_softc apm_softc; 66 67static void apm_resume(void); 68static int apm_bioscall(void); 69static int apm_check_function_supported(u_int version, u_int func); 70 71static int apm_pm_func(u_long, void*, ...); 72 73static u_long apm_version; 74 75int apm_evindex; 76 77#define SCFLAG_ONORMAL 0x0000001 78#define SCFLAG_OCTL 0x0000002 79#define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL) 80 81#define APMDEV(dev) (minor(dev)&0x0f) 82#define APMDEV_NORMAL 0 83#define APMDEV_CTL 8 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 137TUNABLE_INT("machdep.apm_swab_batt_minutes", &apm_swab_batt_minutes); 138SYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RW, 139 &apm_swab_batt_minutes, 0, "Byte swap battery time value."); 140 141#ifdef PC98 142static __inline void 143apm_enable_smm(sc) 144 struct apm_softc *sc; 145{ 146 bus_space_tag_t iot = sc->sc_iot; 147 bus_space_handle_t ioh = sc->sc_ioh; 148 if (apm_necsmm_addr != 0) 149 bus_space_write_1(iot, ioh, 0, 150 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask)); 151} 152 153static __inline void 154apm_disable_smm(sc) 155 struct apm_softc *sc; 156{ 157 bus_space_tag_t iot = sc->sc_iot; 158 bus_space_handle_t ioh = sc->sc_ioh; 159 if (apm_necsmm_addr != 0) 160 bus_space_write_1(iot, ioh, 0, 161 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask)); 162} 163#endif 164 165/* 166 * return 0 if the function successfull, 167 * return 1 if the function unsuccessfull, 168 * return -1 if the function unsupported. 169 */ 170static int 171apm_bioscall(void) 172{ 173 struct apm_softc *sc = &apm_softc; 174 int errno = 0; 175 u_int apm_func = sc->bios.r.eax & 0xff; 176 177 if (!apm_check_function_supported(sc->intversion, apm_func)) { 178 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n", 179 apm_func, sc->majorversion, sc->minorversion); 180 return (-1); 181 } 182 183 sc->bios_busy = 1; 184#ifdef PC98 185 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG); 186 if (bios32_apm98(&sc->bios.r, sc->bios.entry, 187 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0) 188 return 1; 189#else 190 if (sc->connectmode == APM_PROT32CONNECT) { 191 set_bios_selectors(&sc->bios.seg, 192 BIOSCODE_FLAG | BIOSDATA_FLAG); 193 errno = bios32(&sc->bios.r, 194 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL)); 195 } else { 196 errno = bios16(&sc->bios, NULL); 197 } 198#endif 199 sc->bios_busy = 0; 200 return (errno); 201} 202 203/* check whether APM function is supported (1) or not (0). */ 204static int 205apm_check_function_supported(u_int version, u_int func) 206{ 207 /* except driver version */ 208 if (func == APM_DRVVERSION) { 209 return (1); 210 } 211#ifdef PC98 212 if (func == APM_GETPWSTATUS) { 213 return (1); 214 } 215#endif 216 217 switch (version) { 218 case INTVERSION(1, 0): 219 if (func > APM_GETPMEVENT) { 220 return (0); /* not supported */ 221 } 222 break; 223 case INTVERSION(1, 1): 224 if (func > APM_ENGAGEDISENGAGEPM && 225 func < APM_OEMFUNC) { 226 return (0); /* not supported */ 227 } 228 break; 229 case INTVERSION(1, 2): 230 break; 231 } 232 233 return (1); /* supported */ 234} 235 236/* enable/disable power management */ 237static int 238apm_enable_disable_pm(int enable) 239{ 240 struct apm_softc *sc = &apm_softc; 241 242 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM; 243 244 if (sc->intversion >= INTVERSION(1, 1)) 245 sc->bios.r.ebx = PMDV_ALLDEV; 246 else 247 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */ 248 sc->bios.r.ecx = enable; 249 sc->bios.r.edx = 0; 250 return (apm_bioscall()); 251} 252 253/* register driver version (APM 1.1 or later) */ 254static int 255apm_driver_version(int version) 256{ 257 struct apm_softc *sc = &apm_softc; 258 259 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION; 260 sc->bios.r.ebx = 0x0; 261 sc->bios.r.ecx = version; 262 sc->bios.r.edx = 0; 263 264 if (apm_bioscall() == 0 && sc->bios.r.eax == version) 265 return (0); 266 267 /* Some old BIOSes don't return the connection version in %ax. */ 268 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION)) 269 return (0); 270 271 return (1); 272} 273 274/* engage/disengage power management (APM 1.1 or later) */ 275static int 276apm_engage_disengage_pm(int engage) 277{ 278 struct apm_softc *sc = &apm_softc; 279 280 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM; 281 sc->bios.r.ebx = PMDV_ALLDEV; 282 sc->bios.r.ecx = engage; 283 sc->bios.r.edx = 0; 284 return (apm_bioscall()); 285} 286 287/* get PM event */ 288static u_int 289apm_getevent(void) 290{ 291 struct apm_softc *sc = &apm_softc; 292 293 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT; 294 295 sc->bios.r.ebx = 0; 296 sc->bios.r.ecx = 0; 297 sc->bios.r.edx = 0; 298 if (apm_bioscall()) 299 return (PMEV_NOEVENT); 300 return (sc->bios.r.ebx & 0xffff); 301} 302 303/* suspend entire system */ 304static int 305apm_suspend_system(int state) 306{ 307 struct apm_softc *sc = &apm_softc; 308 309 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 310 sc->bios.r.ebx = PMDV_ALLDEV; 311 sc->bios.r.ecx = state; 312 sc->bios.r.edx = 0; 313 314#ifdef PC98 315 apm_disable_smm(sc); 316#endif 317 if (apm_bioscall()) { 318 printf("Entire system suspend failure: errcode = %d\n", 319 0xff & (sc->bios.r.eax >> 8)); 320 return 1; 321 } 322#ifdef PC98 323 apm_enable_smm(sc); 324#endif 325 return 0; 326} 327 328/* Display control */ 329/* 330 * Experimental implementation: My laptop machine can't handle this function 331 * If your laptop can control the display via APM, please inform me. 332 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 333 */ 334int 335apm_display(int newstate) 336{ 337 struct apm_softc *sc = &apm_softc; 338 339 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 340 sc->bios.r.ebx = PMDV_DISP0; 341 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 342 sc->bios.r.edx = 0; 343 if (apm_bioscall() == 0) { 344 return 0; 345 } 346 347 /* If failed, then try to blank all display devices instead. */ 348 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 349 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */ 350 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 351 sc->bios.r.edx = 0; 352 if (apm_bioscall() == 0) { 353 return 0; 354 } 355 printf("Display off failure: errcode = %d\n", 356 0xff & (sc->bios.r.eax >> 8)); 357 return 1; 358} 359 360/* 361 * Turn off the entire system. 362 */ 363static void 364apm_power_off(void *junk, int howto) 365{ 366 struct apm_softc *sc = &apm_softc; 367 368 /* Not halting powering off, or not active */ 369 if (!(howto & RB_POWEROFF) || !apm_softc.active) 370 return; 371 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 372 sc->bios.r.ebx = PMDV_ALLDEV; 373 sc->bios.r.ecx = PMST_OFF; 374 sc->bios.r.edx = 0; 375 (void) apm_bioscall(); 376} 377 378/* APM Battery low handler */ 379static void 380apm_battery_low(void) 381{ 382 printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 383} 384 385/* APM hook manager */ 386static struct apmhook * 387apm_add_hook(struct apmhook **list, struct apmhook *ah) 388{ 389 int s; 390 struct apmhook *p, *prev; 391 392 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name); 393 394 s = splhigh(); 395 if (ah == NULL) 396 panic("illegal apm_hook!"); 397 prev = NULL; 398 for (p = *list; p != NULL; prev = p, p = p->ah_next) 399 if (p->ah_order > ah->ah_order) 400 break; 401 402 if (prev == NULL) { 403 ah->ah_next = *list; 404 *list = ah; 405 } else { 406 ah->ah_next = prev->ah_next; 407 prev->ah_next = ah; 408 } 409 splx(s); 410 return ah; 411} 412 413static void 414apm_del_hook(struct apmhook **list, struct apmhook *ah) 415{ 416 int s; 417 struct apmhook *p, *prev; 418 419 s = splhigh(); 420 prev = NULL; 421 for (p = *list; p != NULL; prev = p, p = p->ah_next) 422 if (p == ah) 423 goto deleteit; 424 panic("Tried to delete unregistered apm_hook."); 425 goto nosuchnode; 426deleteit: 427 if (prev != NULL) 428 prev->ah_next = p->ah_next; 429 else 430 *list = p->ah_next; 431nosuchnode: 432 splx(s); 433} 434 435 436/* APM driver calls some functions automatically */ 437static void 438apm_execute_hook(struct apmhook *list) 439{ 440 struct apmhook *p; 441 442 for (p = list; p != NULL; p = p->ah_next) { 443 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name); 444 if ((*(p->ah_fun))(p->ah_arg)) 445 printf("Warning: APM hook \"%s\" failed", p->ah_name); 446 } 447} 448 449 450/* establish an apm hook */ 451struct apmhook * 452apm_hook_establish(int apmh, struct apmhook *ah) 453{ 454 if (apmh < 0 || apmh >= NAPM_HOOK) 455 return NULL; 456 457 return apm_add_hook(&hook[apmh], ah); 458} 459 460/* disestablish an apm hook */ 461void 462apm_hook_disestablish(int apmh, struct apmhook *ah) 463{ 464 if (apmh < 0 || apmh >= NAPM_HOOK) 465 return; 466 467 apm_del_hook(&hook[apmh], ah); 468} 469 470static int apm_record_event(struct apm_softc *, u_int); 471static void apm_processevent(void); 472 473static u_int apm_op_inprog = 0; 474 475static void 476apm_do_suspend(void) 477{ 478 struct apm_softc *sc = &apm_softc; 479 int error; 480 481 if (sc == NULL || sc->initialized == 0) 482 return; 483 484 apm_op_inprog = 0; 485 sc->suspends = sc->suspend_countdown = 0; 486 487 error = DEVICE_SUSPEND(root_bus); 488 if (error) 489 return; 490 491 apm_execute_hook(hook[APM_HOOK_SUSPEND]); 492 if (apm_suspend_system(PMST_SUSPEND) == 0) { 493 sc->suspending = 1; 494 apm_processevent(); 495 } else { 496 /* Failure, 'resume' the system again */ 497 apm_execute_hook(hook[APM_HOOK_RESUME]); 498 DEVICE_RESUME(root_bus); 499 } 500 return; 501} 502 503static void 504apm_do_standby(void) 505{ 506 struct apm_softc *sc = &apm_softc; 507 508 if (sc == NULL || sc->initialized == 0) 509 return; 510 511 apm_op_inprog = 0; 512 sc->standbys = sc->standby_countdown = 0; 513 514 /* 515 * As far as standby, we don't need to execute 516 * all of suspend hooks. 517 */ 518 if (apm_suspend_system(PMST_STANDBY) == 0) 519 apm_processevent(); 520 return; 521} 522 523static void 524apm_lastreq_notify(void) 525{ 526 struct apm_softc *sc = &apm_softc; 527 528 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 529 sc->bios.r.ebx = PMDV_ALLDEV; 530 sc->bios.r.ecx = PMST_LASTREQNOTIFY; 531 sc->bios.r.edx = 0; 532 apm_bioscall(); 533} 534 535static int 536apm_lastreq_rejected(void) 537{ 538 struct apm_softc *sc = &apm_softc; 539 540 if (apm_op_inprog == 0) { 541 return 1; /* no operation in progress */ 542 } 543 544 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 545 sc->bios.r.ebx = PMDV_ALLDEV; 546 sc->bios.r.ecx = PMST_LASTREQREJECT; 547 sc->bios.r.edx = 0; 548 549 if (apm_bioscall()) { 550 APM_DPRINT("apm_lastreq_rejected: failed\n"); 551 return 1; 552 } 553 apm_op_inprog = 0; 554 return 0; 555} 556 557/* 558 * Public interface to the suspend/resume: 559 * 560 * Execute suspend and resume hook before and after sleep, respectively. 561 * 562 */ 563 564void 565apm_suspend(int state) 566{ 567 struct apm_softc *sc = &apm_softc; 568 569 if (sc == NULL || sc->initialized == 0) 570 return; 571 572 switch (state) { 573 case PMST_SUSPEND: 574 if (sc->suspends) 575 return; 576 sc->suspends++; 577 sc->suspend_countdown = apm_suspend_delay; 578 break; 579 case PMST_STANDBY: 580 if (sc->standbys) 581 return; 582 sc->standbys++; 583 sc->standby_countdown = apm_standby_delay; 584 break; 585 default: 586 printf("apm_suspend: Unknown Suspend state 0x%x\n", state); 587 return; 588 } 589 590 apm_op_inprog++; 591 apm_lastreq_notify(); 592} 593 594static void 595apm_resume(void) 596{ 597 struct apm_softc *sc = &apm_softc; 598 599 if (sc == NULL || sc->initialized == 0 || sc->suspending == 0) 600 return; 601 602 sc->suspending = 0; 603 apm_execute_hook(hook[APM_HOOK_RESUME]); 604 DEVICE_RESUME(root_bus); 605 return; 606} 607 608 609/* get power status per battery */ 610static int 611apm_get_pwstatus(apm_pwstatus_t app) 612{ 613 struct apm_softc *sc = &apm_softc; 614 615 if (app->ap_device != PMDV_ALLDEV && 616 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL)) 617 return 1; 618 619 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 620 sc->bios.r.ebx = app->ap_device; 621 sc->bios.r.ecx = 0; 622 sc->bios.r.edx = 0xffff; /* default to unknown battery time */ 623 624 if (apm_bioscall()) 625 return 1; 626 627 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff; 628 app->ap_batt_stat = sc->bios.r.ebx & 0xff; 629 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff; 630 app->ap_batt_life = sc->bios.r.ecx & 0xff; 631 sc->bios.r.edx &= 0xffff; 632 if (apm_swab_batt_minutes) 633 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000; 634 if (sc->bios.r.edx == 0xffff) /* Time is unknown */ 635 app->ap_batt_time = -1; 636 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */ 637 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60; 638 else /* Time is in seconds */ 639 app->ap_batt_time = sc->bios.r.edx; 640 641 return 0; 642} 643 644 645/* get APM information */ 646static int 647apm_get_info(apm_info_t aip) 648{ 649 struct apm_softc *sc = &apm_softc; 650 struct apm_pwstatus aps; 651 652 bzero(&aps, sizeof(aps)); 653 aps.ap_device = PMDV_ALLDEV; 654 if (apm_get_pwstatus(&aps)) 655 return 1; 656 657 aip->ai_infoversion = 1; 658 aip->ai_acline = aps.ap_acline; 659 aip->ai_batt_stat = aps.ap_batt_stat; 660 aip->ai_batt_life = aps.ap_batt_life; 661 aip->ai_batt_time = aps.ap_batt_time; 662 aip->ai_major = (u_int)sc->majorversion; 663 aip->ai_minor = (u_int)sc->minorversion; 664 aip->ai_status = (u_int)sc->active; 665 666 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 667 sc->bios.r.ebx = 0; 668 sc->bios.r.ecx = 0; 669 sc->bios.r.edx = 0; 670 if (apm_bioscall()) { 671 aip->ai_batteries = 0xffffffff; /* Unknown */ 672 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 673 } else { 674 aip->ai_batteries = sc->bios.r.ebx & 0xff; 675 aip->ai_capabilities = sc->bios.r.ecx & 0xff; 676 } 677 678 bzero(aip->ai_spare, sizeof aip->ai_spare); 679 680 return 0; 681} 682 683 684/* inform APM BIOS that CPU is idle */ 685void 686apm_cpu_idle(void) 687{ 688 struct apm_softc *sc = &apm_softc; 689 690 if (sc->active) { 691 692 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE; 693 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 694 (void) apm_bioscall(); 695 } 696 /* 697 * Some APM implementation halts CPU in BIOS, whenever 698 * "CPU-idle" function are invoked, but swtch() of 699 * FreeBSD halts CPU, therefore, CPU is halted twice 700 * in the sched loop. It makes the interrupt latency 701 * terribly long and be able to cause a serious problem 702 * in interrupt processing. We prevent it by removing 703 * "hlt" operation from swtch() and managed it under 704 * APM driver. 705 */ 706 if (!sc->active || sc->always_halt_cpu) 707 halt(); /* wait for interrupt */ 708} 709 710/* inform APM BIOS that CPU is busy */ 711void 712apm_cpu_busy(void) 713{ 714 struct apm_softc *sc = &apm_softc; 715 716 /* 717 * The APM specification says this is only necessary if your BIOS 718 * slows down the processor in the idle task, otherwise it's not 719 * necessary. 720 */ 721 if (sc->slow_idle_cpu && sc->active) { 722 723 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY; 724 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 725 apm_bioscall(); 726 } 727} 728 729 730/* 731 * APM thread loop. 732 * 733 * This routine wakes up from time to time to deal with delaying the 734 * suspend of the system, or other events. 735 */ 736static void 737apm_event_thread(void *arg) 738{ 739 struct apm_softc *sc = &apm_softc; 740 741 sc->running = 1; 742 while (sc->active) { 743 if (apm_op_inprog) 744 apm_lastreq_notify(); 745 if (sc->standbys && sc->standby_countdown-- <= 0) 746 apm_do_standby(); 747 if (sc->suspends && sc->suspend_countdown-- <= 0) 748 apm_do_suspend(); 749 if (!sc->bios_busy) 750 apm_processevent(); 751 mtx_lock(&sc->mtx); 752 cv_timedwait(&sc->cv, &sc->mtx, 10 * hz / 9); 753 mtx_unlock(&sc->mtx); 754 } 755 sc->running = 0; 756 kthread_exit(0); 757} 758 759/* enable APM BIOS */ 760static void 761apm_event_enable(void) 762{ 763 struct apm_softc *sc = &apm_softc; 764 765 APM_DPRINT("called apm_event_enable()\n"); 766 767 if (sc == NULL || sc->initialized == 0) 768 return; 769 770 /* Start the thread */ 771 sc->active = 1; 772 if (kthread_create(apm_event_thread, sc, &sc->event_thread, 0, 0, 773 "apm worker")) 774 panic("Cannot create apm worker thread"); 775 776 return; 777} 778 779/* disable APM BIOS */ 780static void 781apm_event_disable(void) 782{ 783 struct apm_softc *sc = &apm_softc; 784 785 APM_DPRINT("called apm_event_disable()\n"); 786 787 if (sc == NULL || sc->initialized == 0) 788 return; 789 790 mtx_lock(&sc->mtx); 791 sc->active = 0; 792 while (sc->running) { 793 cv_broadcast(&sc->cv); 794 msleep(sc->event_thread, &sc->mtx, PWAIT, "apmdie", 0); 795 } 796 mtx_unlock(&sc->mtx); 797 sc->event_thread = NULL; 798 return; 799} 800 801/* halt CPU in scheduling loop */ 802static void 803apm_halt_cpu(void) 804{ 805 struct apm_softc *sc = &apm_softc; 806 807 if (sc == NULL || sc->initialized == 0) 808 return; 809 810 sc->always_halt_cpu = 1; 811 812 return; 813} 814 815/* don't halt CPU in scheduling loop */ 816static void 817apm_not_halt_cpu(void) 818{ 819 struct apm_softc *sc = &apm_softc; 820 821 if (sc == NULL || sc->initialized == 0) 822 return; 823 824 sc->always_halt_cpu = 0; 825 826 return; 827} 828 829/* device driver definitions */ 830 831/* 832 * Module event 833 */ 834 835static int 836apm_modevent(struct module *mod, int event, void *junk) 837{ 838 839 switch (event) { 840 case MOD_LOAD: 841 if (!cold) 842 return (EPERM); 843 break; 844 case MOD_UNLOAD: 845 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM) 846 return (EBUSY); 847 break; 848 default: 849 break; 850 } 851 852 return (0); 853} 854 855/* 856 * Create "connection point" 857 */ 858static void 859apm_identify(driver_t *driver, device_t parent) 860{ 861 device_t child; 862 863 if (!cold) { 864 printf("Don't load this driver from userland!!\n"); 865 return; 866 } 867 868 if (resource_disabled("apm", 0)) 869 return; 870 871 child = BUS_ADD_CHILD(parent, 0, "apm", 0); 872 if (child == NULL) 873 panic("apm_identify"); 874} 875 876/* 877 * probe for APM BIOS 878 */ 879static int 880apm_probe(device_t dev) 881{ 882#define APM_KERNBASE KERNBASE 883 struct vm86frame vmf; 884 struct apm_softc *sc = &apm_softc; 885#ifdef PC98 886 int rid; 887#endif 888 889 device_set_desc(dev, "APM BIOS"); 890 if (device_get_unit(dev) > 0) { 891 printf("apm: Only one APM driver supported.\n"); 892 return ENXIO; 893 } 894 895 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 896 power_pm_get_type() != POWER_PM_TYPE_APM) { 897 printf("apm: Other PM system enabled.\n"); 898 return ENXIO; 899 } 900 901 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 902 bzero(&apm_softc, sizeof(apm_softc)); 903 vmf.vmf_ah = APM_BIOS; 904 vmf.vmf_al = APM_INSTCHECK; 905 vmf.vmf_bx = 0; 906 if (vm86_intcall(APM_INT, &vmf)) 907 return ENXIO; /* APM not found */ 908 if (vmf.vmf_bx != 0x504d) { 909 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); 910 return ENXIO; 911 } 912 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { 913 printf("apm: protected mode connections are not supported\n"); 914 return ENXIO; 915 } 916 917 apm_version = vmf.vmf_ax; 918 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); 919 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); 920 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); 921 922 vmf.vmf_ah = APM_BIOS; 923 vmf.vmf_al = APM_DISCONNECT; 924 vmf.vmf_bx = 0; 925 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ 926 927#ifdef PC98 928 /* PC98 have bogos APM 32bit BIOS */ 929 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0) 930 return ENXIO; 931 rid = 0; 932 bus_set_resource(dev, SYS_RES_IOPORT, rid, 933 APM_NECSMM_PORT, APM_NECSMM_PORTSZ); 934 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 935 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 936 if (sc->sc_res == NULL) { 937 printf("apm: cannot open NEC smm device\n"); 938 return ENXIO; 939 } 940 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res); 941 942 vmf.vmf_ah = APM_BIOS; 943 vmf.vmf_al = APM_PROT32CONNECT; 944 vmf.vmf_bx = 0; 945 if (vm86_intcall(APM_INT, &vmf)) { 946 printf("apm: 32-bit connection error.\n"); 947 return (ENXIO); 948 } 949 950 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 951 sc->bios.seg.code32.limit = 0xffff; 952 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 953 sc->bios.seg.code16.limit = 0xffff; 954 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 955 sc->bios.seg.data.limit = 0xffff; 956 sc->bios.entry = vmf.vmf_ebx; 957 sc->connectmode = APM_PROT32CONNECT; 958#else 959 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 960 vmf.vmf_ah = APM_BIOS; 961 vmf.vmf_al = APM_PROT32CONNECT; 962 vmf.vmf_bx = 0; 963 if (vm86_intcall(APM_INT, &vmf)) { 964 printf("apm: 32-bit connection error.\n"); 965 return (ENXIO); 966 } 967 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 968 sc->bios.seg.code32.limit = 0xffff; 969 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 970 sc->bios.seg.code16.limit = 0xffff; 971 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 972 sc->bios.seg.data.limit = 0xffff; 973 sc->bios.entry = vmf.vmf_ebx; 974 sc->connectmode = APM_PROT32CONNECT; 975 } else { 976 /* use 16-bit connection */ 977 vmf.vmf_ah = APM_BIOS; 978 vmf.vmf_al = APM_PROT16CONNECT; 979 vmf.vmf_bx = 0; 980 if (vm86_intcall(APM_INT, &vmf)) { 981 printf("apm: 16-bit connection error.\n"); 982 return (ENXIO); 983 } 984 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 985 sc->bios.seg.code16.limit = 0xffff; 986 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 987 sc->bios.seg.data.limit = 0xffff; 988 sc->bios.entry = vmf.vmf_bx; 989 sc->connectmode = APM_PROT16CONNECT; 990 } 991#endif 992 return(0); 993} 994 995 996/* 997 * return 0 if the user will notice and handle the event, 998 * return 1 if the kernel driver should do so. 999 */ 1000static int 1001apm_record_event(struct apm_softc *sc, u_int event_type) 1002{ 1003 struct apm_event_info *evp; 1004 1005 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 1006 return 1; /* no user waiting */ 1007 if (sc->event_count == APM_NEVENTS) 1008 return 1; /* overflow */ 1009 if (sc->event_filter[event_type] == 0) 1010 return 1; /* not registered */ 1011 evp = &sc->event_list[sc->event_ptr]; 1012 sc->event_count++; 1013 sc->event_ptr++; 1014 sc->event_ptr %= APM_NEVENTS; 1015 evp->type = event_type; 1016 evp->index = ++apm_evindex; 1017 selwakeuppri(&sc->sc_rsel, PZERO); 1018 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 1019} 1020 1021/* Power profile */ 1022static void 1023apm_power_profile(struct apm_softc *sc) 1024{ 1025 int state; 1026 struct apm_info info; 1027 static int apm_acline = 0; 1028 1029 if (apm_get_info(&info)) 1030 return; 1031 1032 if (apm_acline != info.ai_acline) { 1033 apm_acline = info.ai_acline; 1034 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY; 1035 power_profile_set_state(state); 1036 } 1037} 1038 1039/* Process APM event */ 1040static void 1041apm_processevent(void) 1042{ 1043 int apm_event; 1044 struct apm_softc *sc = &apm_softc; 1045 1046#define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 1047 APM_DPRINT("Received APM Event: " #symbol "\n"); 1048 1049 do { 1050 apm_event = apm_getevent(); 1051 switch (apm_event) { 1052 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 1053 if (apm_op_inprog == 0) { 1054 apm_op_inprog++; 1055 if (apm_record_event(sc, apm_event)) { 1056 apm_suspend(PMST_STANDBY); 1057 } 1058 } 1059 break; 1060 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); 1061 if (apm_op_inprog == 0) { 1062 apm_op_inprog++; 1063 if (apm_record_event(sc, apm_event)) { 1064 apm_suspend(PMST_STANDBY); 1065 } 1066 } 1067 break; 1068 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 1069 apm_lastreq_notify(); 1070 if (apm_op_inprog == 0) { 1071 apm_op_inprog++; 1072 if (apm_record_event(sc, apm_event)) { 1073 apm_do_suspend(); 1074 } 1075 } 1076 return; /* XXX skip the rest */ 1077 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 1078 apm_lastreq_notify(); 1079 if (apm_op_inprog == 0) { 1080 apm_op_inprog++; 1081 if (apm_record_event(sc, apm_event)) { 1082 apm_do_suspend(); 1083 } 1084 } 1085 return; /* XXX skip the rest */ 1086 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 1087 apm_do_suspend(); 1088 break; 1089 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 1090 apm_record_event(sc, apm_event); 1091 apm_resume(); 1092 break; 1093 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 1094 apm_record_event(sc, apm_event); 1095 apm_resume(); 1096 break; 1097 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 1098 apm_record_event(sc, apm_event); 1099 break; 1100 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 1101 if (apm_record_event(sc, apm_event)) { 1102 apm_battery_low(); 1103 apm_suspend(PMST_SUSPEND); 1104 } 1105 break; 1106 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 1107 apm_record_event(sc, apm_event); 1108 apm_power_profile(sc); 1109 break; 1110 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 1111 apm_record_event(sc, apm_event); 1112 inittodr(0); /* adjust time to RTC */ 1113 break; 1114 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); 1115 apm_record_event(sc, apm_event); 1116 apm_power_profile(sc); 1117 break; 1118 case PMEV_NOEVENT: 1119 break; 1120 default: 1121 printf("Unknown Original APM Event 0x%x\n", apm_event); 1122 break; 1123 } 1124 } while (apm_event != PMEV_NOEVENT); 1125#ifdef PC98 1126 apm_disable_smm(sc); 1127#endif 1128} 1129 1130/* 1131 * Attach APM: 1132 * 1133 * Initialize APM driver 1134 */ 1135 1136static int 1137apm_attach(device_t dev) 1138{ 1139 struct apm_softc *sc = &apm_softc; 1140 int drv_version; 1141#ifdef PC98 1142 int rid; 1143#endif 1144 mtx_init(&sc->mtx, device_get_nameunit(dev), "apm", MTX_DEF); 1145 cv_init(&sc->cv, "cbb cv"); 1146 1147 if (device_get_flags(dev) & 0x20) 1148 statclock_disable = 1; 1149 1150 sc->initialized = 0; 1151 1152 /* Must be externally enabled */ 1153 sc->active = 0; 1154 1155 /* Always call HLT in idle loop */ 1156 sc->always_halt_cpu = 1; 1157 1158 getenv_int("debug.apm_debug", &apm_debug); 1159 1160 /* print bootstrap messages */ 1161 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version); 1162 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n", 1163 sc->bios.seg.code16.base, sc->bios.seg.data.base); 1164 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 1165 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 1166 is_enabled(!sc->disabled)); 1167 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n", 1168 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 1169 1170#ifdef PC98 1171 rid = 0; 1172 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1173 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 1174 if (sc->sc_res == NULL) 1175 panic("%s: counldn't map I/O ports", device_get_name(dev)); 1176 sc->sc_iot = rman_get_bustag(sc->sc_res); 1177 sc->sc_ioh = rman_get_bushandle(sc->sc_res); 1178 1179 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110) 1180 apm_necsmm_addr = APM_NECSMM_PORT; 1181 else 1182 apm_necsmm_addr = 0; 1183 apm_necsmm_mask = ~APM_NECSMM_EN; 1184#endif /* PC98 */ 1185 1186 /* 1187 * In one test, apm bios version was 1.02; an attempt to register 1188 * a 1.04 driver resulted in a 1.00 connection! Registering a 1189 * 1.02 driver resulted in a 1.02 connection. 1190 */ 1191 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 1192 for (; drv_version > 0x100; drv_version--) 1193 if (apm_driver_version(drv_version) == 0) 1194 break; 1195 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 1196 ((drv_version & 0x000f) >> 0); 1197 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 1198 ((apm_version & 0x0f00) >> 8); 1199 1200 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1201 1202 if (sc->intversion >= INTVERSION(1, 1)) 1203 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1204 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n", 1205 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 1206 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 1207 sc->majorversion, sc->minorversion); 1208 1209 1210 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1211 /* enable power management */ 1212 if (sc->disabled) { 1213 if (apm_enable_disable_pm(1)) { 1214 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n", 1215 (sc->bios.r.eax >> 8) & 0xff); 1216 } 1217 } 1218 1219 /* engage power managment (APM 1.1 or later) */ 1220 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1221 if (apm_engage_disengage_pm(1)) { 1222 APM_DPRINT("apm: *Warning* engage function failed err=[%x]", 1223 (sc->bios.r.eax >> 8) & 0xff); 1224 APM_DPRINT(" (Docked or using external power?).\n"); 1225 } 1226 } 1227 1228 /* Power the system off using APM */ 1229 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 1230 SHUTDOWN_PRI_LAST); 1231 1232 /* Register APM again to pass the correct argument of pm_func. */ 1233 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc); 1234 1235 sc->initialized = 1; 1236 sc->suspending = 0; 1237 sc->running = 0; 1238 1239 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm"); 1240 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl"); 1241 return 0; 1242} 1243 1244static int 1245apmopen(struct cdev *dev, int flag, int fmt, struct thread *td) 1246{ 1247 struct apm_softc *sc = &apm_softc; 1248 int ctl = APMDEV(dev); 1249 1250 if (sc == NULL || sc->initialized == 0) 1251 return (ENXIO); 1252 1253 switch (ctl) { 1254 case APMDEV_CTL: 1255 if (!(flag & FWRITE)) 1256 return EINVAL; 1257 if (sc->sc_flags & SCFLAG_OCTL) 1258 return EBUSY; 1259 sc->sc_flags |= SCFLAG_OCTL; 1260 bzero(sc->event_filter, sizeof sc->event_filter); 1261 break; 1262 case APMDEV_NORMAL: 1263 sc->sc_flags |= SCFLAG_ONORMAL; 1264 break; 1265 default: 1266 return ENXIO; 1267 break; 1268 } 1269 return 0; 1270} 1271 1272static int 1273apmclose(struct cdev *dev, int flag, int fmt, struct thread *td) 1274{ 1275 struct apm_softc *sc = &apm_softc; 1276 int ctl = APMDEV(dev); 1277 1278 switch (ctl) { 1279 case APMDEV_CTL: 1280 apm_lastreq_rejected(); 1281 sc->sc_flags &= ~SCFLAG_OCTL; 1282 bzero(sc->event_filter, sizeof sc->event_filter); 1283 break; 1284 case APMDEV_NORMAL: 1285 sc->sc_flags &= ~SCFLAG_ONORMAL; 1286 break; 1287 } 1288 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1289 sc->event_count = 0; 1290 sc->event_ptr = 0; 1291 } 1292 return 0; 1293} 1294 1295static int 1296apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1297{ 1298 struct apm_softc *sc = &apm_softc; 1299 struct apm_bios_arg *args; 1300 int error = 0; 1301 int ret; 1302 int newstate; 1303 1304 if (sc == NULL || sc->initialized == 0) 1305 return (ENXIO); 1306 1307 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd); 1308 switch (cmd) { 1309 case APMIO_SUSPEND: 1310 if (!(flag & FWRITE)) 1311 return (EPERM); 1312 if (sc->active) 1313 apm_suspend(PMST_SUSPEND); 1314 else 1315 error = EINVAL; 1316 break; 1317 1318 case APMIO_STANDBY: 1319 if (!(flag & FWRITE)) 1320 return (EPERM); 1321 if (sc->active) 1322 apm_suspend(PMST_STANDBY); 1323 else 1324 error = EINVAL; 1325 break; 1326 1327 case APMIO_GETINFO_OLD: 1328 { 1329 struct apm_info info; 1330 apm_info_old_t aiop; 1331 1332 if (apm_get_info(&info)) 1333 error = ENXIO; 1334 aiop = (apm_info_old_t)addr; 1335 aiop->ai_major = info.ai_major; 1336 aiop->ai_minor = info.ai_minor; 1337 aiop->ai_acline = info.ai_acline; 1338 aiop->ai_batt_stat = info.ai_batt_stat; 1339 aiop->ai_batt_life = info.ai_batt_life; 1340 aiop->ai_status = info.ai_status; 1341 } 1342 break; 1343 case APMIO_GETINFO: 1344 if (apm_get_info((apm_info_t)addr)) 1345 error = ENXIO; 1346 break; 1347 case APMIO_GETPWSTATUS: 1348 if (apm_get_pwstatus((apm_pwstatus_t)addr)) 1349 error = ENXIO; 1350 break; 1351 case APMIO_ENABLE: 1352 if (!(flag & FWRITE)) 1353 return (EPERM); 1354 apm_event_enable(); 1355 break; 1356 case APMIO_DISABLE: 1357 if (!(flag & FWRITE)) 1358 return (EPERM); 1359 apm_event_disable(); 1360 break; 1361 case APMIO_HALTCPU: 1362 if (!(flag & FWRITE)) 1363 return (EPERM); 1364 apm_halt_cpu(); 1365 break; 1366 case APMIO_NOTHALTCPU: 1367 if (!(flag & FWRITE)) 1368 return (EPERM); 1369 apm_not_halt_cpu(); 1370 break; 1371 case APMIO_DISPLAY: 1372 if (!(flag & FWRITE)) 1373 return (EPERM); 1374 newstate = *(int *)addr; 1375 if (apm_display(newstate)) 1376 error = ENXIO; 1377 break; 1378 case APMIO_BIOS: 1379 if (!(flag & FWRITE)) 1380 return (EPERM); 1381 /* XXX compatibility with the old interface */ 1382 args = (struct apm_bios_arg *)addr; 1383 sc->bios.r.eax = args->eax; 1384 sc->bios.r.ebx = args->ebx; 1385 sc->bios.r.ecx = args->ecx; 1386 sc->bios.r.edx = args->edx; 1387 sc->bios.r.esi = args->esi; 1388 sc->bios.r.edi = args->edi; 1389 if ((ret = apm_bioscall())) { 1390 /* 1391 * Return code 1 means bios call was unsuccessful. 1392 * Error code is stored in %ah. 1393 * Return code -1 means bios call was unsupported 1394 * in the APM BIOS version. 1395 */ 1396 if (ret == -1) { 1397 error = EINVAL; 1398 } 1399 } else { 1400 /* 1401 * Return code 0 means bios call was successful. 1402 * We need only %al and can discard %ah. 1403 */ 1404 sc->bios.r.eax &= 0xff; 1405 } 1406 args->eax = sc->bios.r.eax; 1407 args->ebx = sc->bios.r.ebx; 1408 args->ecx = sc->bios.r.ecx; 1409 args->edx = sc->bios.r.edx; 1410 args->esi = sc->bios.r.esi; 1411 args->edi = sc->bios.r.edi; 1412 break; 1413 default: 1414 error = EINVAL; 1415 break; 1416 } 1417 1418 /* for /dev/apmctl */ 1419 if (APMDEV(dev) == APMDEV_CTL) { 1420 struct apm_event_info *evp; 1421 int i; 1422 1423 error = 0; 1424 switch (cmd) { 1425 case APMIO_NEXTEVENT: 1426 if (!sc->event_count) { 1427 error = EAGAIN; 1428 } else { 1429 evp = (struct apm_event_info *)addr; 1430 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1431 i %= APM_NEVENTS; 1432 *evp = sc->event_list[i]; 1433 sc->event_count--; 1434 } 1435 break; 1436 case APMIO_REJECTLASTREQ: 1437 if (apm_lastreq_rejected()) { 1438 error = EINVAL; 1439 } 1440 break; 1441 default: 1442 error = EINVAL; 1443 break; 1444 } 1445 } 1446 1447 return error; 1448} 1449 1450static int 1451apmwrite(struct cdev *dev, struct uio *uio, int ioflag) 1452{ 1453 struct apm_softc *sc = &apm_softc; 1454 u_int event_type; 1455 int error; 1456 u_char enabled; 1457 1458 if (APMDEV(dev) != APMDEV_CTL) 1459 return(ENODEV); 1460 if (uio->uio_resid != sizeof(u_int)) 1461 return(E2BIG); 1462 1463 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1464 return(error); 1465 1466 if (event_type < 0 || event_type >= APM_NPMEV) 1467 return(EINVAL); 1468 1469 if (sc->event_filter[event_type] == 0) { 1470 enabled = 1; 1471 } else { 1472 enabled = 0; 1473 } 1474 sc->event_filter[event_type] = enabled; 1475 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1476 1477 return uio->uio_resid; 1478} 1479 1480static int 1481apmpoll(struct cdev *dev, int events, struct thread *td) 1482{ 1483 struct apm_softc *sc = &apm_softc; 1484 int revents = 0; 1485 1486 if (events & (POLLIN | POLLRDNORM)) { 1487 if (sc->event_count) { 1488 revents |= events & (POLLIN | POLLRDNORM); 1489 } else { 1490 selrecord(td, &sc->sc_rsel); 1491 } 1492 } 1493 1494 return (revents); 1495} 1496 1497static device_method_t apm_methods[] = { 1498 /* Device interface */ 1499 DEVMETHOD(device_identify, apm_identify), 1500 DEVMETHOD(device_probe, apm_probe), 1501 DEVMETHOD(device_attach, apm_attach), 1502 1503 { 0, 0 } 1504}; 1505 1506static driver_t apm_driver = { 1507 "apm", 1508 apm_methods, 1509 1, /* no softc (XXX) */ 1510}; 1511 1512static devclass_t apm_devclass; 1513 1514DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0); 1515MODULE_VERSION(apm, 1); 1516 1517static int 1518apm_pm_func(u_long cmd, void *arg, ...) 1519{ 1520 int state, apm_state; 1521 int error; 1522 va_list ap; 1523 1524 error = 0; 1525 switch (cmd) { 1526 case POWER_CMD_SUSPEND: 1527 va_start(ap, arg); 1528 state = va_arg(ap, int); 1529 va_end(ap); 1530 1531 switch (state) { 1532 case POWER_SLEEP_STATE_STANDBY: 1533 apm_state = PMST_STANDBY; 1534 break; 1535 case POWER_SLEEP_STATE_SUSPEND: 1536 case POWER_SLEEP_STATE_HIBERNATE: 1537 apm_state = PMST_SUSPEND; 1538 break; 1539 default: 1540 error = EINVAL; 1541 goto out; 1542 } 1543 1544 apm_suspend(apm_state); 1545 break; 1546 1547 default: 1548 error = EINVAL; 1549 goto out; 1550 } 1551 1552out: 1553 return (error); 1554} 1555 1556static void 1557apm_pm_register(void *arg) 1558{ 1559 1560 if (!resource_disabled("apm", 0)) 1561 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL); 1562} 1563 1564SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0); 1565