apm.c revision 129882
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 129882 2004-05-30 20:34:58Z phk $"); 21 22#include <sys/param.h> 23#include <sys/systm.h> 24#include <sys/bus.h> 25#include <sys/conf.h> 26#include <sys/eventhandler.h> 27#include <sys/fcntl.h> 28#include <sys/kernel.h> 29#include <sys/module.h> 30#include <sys/poll.h> 31#include <sys/power.h> 32#include <sys/reboot.h> 33#include <sys/selinfo.h> 34#include <sys/signalvar.h> 35#include <sys/sysctl.h> 36#include <sys/syslog.h> 37#include <sys/time.h> 38#include <sys/uio.h> 39 40#include <machine/apm_bios.h> 41#include <machine/clock.h> 42#include <machine/endian.h> 43#include <machine/pc/bios.h> 44#include <machine/cpufunc.h> 45#include <machine/segments.h> 46#include <machine/stdarg.h> 47#include <machine/vm86.h> 48 49#include <machine/bus.h> 50#include <machine/resource.h> 51#include <sys/rman.h> 52 53#include <vm/vm.h> 54#include <vm/pmap.h> 55#include <vm/vm_param.h> 56 57#include <i386/bios/apm.h> 58 59/* Used by the apm_saver screen saver module */ 60int apm_display(int newstate); 61struct apm_softc apm_softc; 62 63static void apm_resume(void); 64static int apm_bioscall(void); 65static int apm_check_function_supported(u_int version, u_int func); 66 67static int apm_pm_func(u_long, void*, ...); 68 69static u_long apm_version; 70 71int apm_evindex; 72 73#define SCFLAG_ONORMAL 0x0000001 74#define SCFLAG_OCTL 0x0000002 75#define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL) 76 77#define APMDEV(dev) (minor(dev)&0x0f) 78#define APMDEV_NORMAL 0 79#define APMDEV_CTL 8 80 81#ifdef PC98 82extern int bios32_apm98(struct bios_regs *, u_int, u_short); 83 84/* PC98's SMM definition */ 85#define APM_NECSMM_PORT 0x6b8e 86#define APM_NECSMM_PORTSZ 1 87#define APM_NECSMM_EN 0x10 88static __inline void apm_enable_smm(struct apm_softc *); 89static __inline void apm_disable_smm(struct apm_softc *); 90int apm_necsmm_addr; 91u_int32_t apm_necsmm_mask; 92#endif 93 94static struct apmhook *hook[NAPM_HOOK]; /* XXX */ 95 96#define is_enabled(foo) ((foo) ? "enabled" : "disabled") 97 98/* Map version number to integer (keeps ordering of version numbers) */ 99#define INTVERSION(major, minor) ((major)*100 + (minor)) 100 101static struct callout_handle apm_timeout_ch = 102 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch); 103 104static timeout_t apm_timeout; 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) 482 return; 483 484 apm_op_inprog = 0; 485 sc->suspends = sc->suspend_countdown = 0; 486 487 if (sc->initialized) { 488 error = DEVICE_SUSPEND(root_bus); 489 if (error) { 490 DEVICE_RESUME(root_bus); 491 } else { 492 apm_execute_hook(hook[APM_HOOK_SUSPEND]); 493 if (apm_suspend_system(PMST_SUSPEND) == 0) { 494 sc->suspending = 1; 495 apm_processevent(); 496 } else { 497 /* Failure, 'resume' the system again */ 498 apm_execute_hook(hook[APM_HOOK_RESUME]); 499 DEVICE_RESUME(root_bus); 500 } 501 } 502 } 503} 504 505static void 506apm_do_standby(void) 507{ 508 struct apm_softc *sc = &apm_softc; 509 510 if (!sc) 511 return; 512 513 apm_op_inprog = 0; 514 sc->standbys = sc->standby_countdown = 0; 515 516 if (sc->initialized) { 517 /* 518 * As far as standby, we don't need to execute 519 * all of suspend hooks. 520 */ 521 if (apm_suspend_system(PMST_STANDBY) == 0) 522 apm_processevent(); 523 } 524} 525 526static void 527apm_lastreq_notify(void) 528{ 529 struct apm_softc *sc = &apm_softc; 530 531 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 532 sc->bios.r.ebx = PMDV_ALLDEV; 533 sc->bios.r.ecx = PMST_LASTREQNOTIFY; 534 sc->bios.r.edx = 0; 535 apm_bioscall(); 536} 537 538static int 539apm_lastreq_rejected(void) 540{ 541 struct apm_softc *sc = &apm_softc; 542 543 if (apm_op_inprog == 0) { 544 return 1; /* no operation in progress */ 545 } 546 547 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 548 sc->bios.r.ebx = PMDV_ALLDEV; 549 sc->bios.r.ecx = PMST_LASTREQREJECT; 550 sc->bios.r.edx = 0; 551 552 if (apm_bioscall()) { 553 APM_DPRINT("apm_lastreq_rejected: failed\n"); 554 return 1; 555 } 556 apm_op_inprog = 0; 557 return 0; 558} 559 560/* 561 * Public interface to the suspend/resume: 562 * 563 * Execute suspend and resume hook before and after sleep, respectively. 564 * 565 */ 566 567void 568apm_suspend(int state) 569{ 570 struct apm_softc *sc = &apm_softc; 571 572 if (!sc->initialized) 573 return; 574 575 switch (state) { 576 case PMST_SUSPEND: 577 if (sc->suspends) 578 return; 579 sc->suspends++; 580 sc->suspend_countdown = apm_suspend_delay; 581 break; 582 case PMST_STANDBY: 583 if (sc->standbys) 584 return; 585 sc->standbys++; 586 sc->standby_countdown = apm_standby_delay; 587 break; 588 default: 589 printf("apm_suspend: Unknown Suspend state 0x%x\n", state); 590 return; 591 } 592 593 apm_op_inprog++; 594 apm_lastreq_notify(); 595} 596 597static void 598apm_resume(void) 599{ 600 struct apm_softc *sc = &apm_softc; 601 602 if (!sc) 603 return; 604 605 if (sc->suspending == 0) 606 return; 607 608 sc->suspending = 0; 609 if (sc->initialized) { 610 apm_execute_hook(hook[APM_HOOK_RESUME]); 611 DEVICE_RESUME(root_bus); 612 } 613} 614 615 616/* get power status per battery */ 617static int 618apm_get_pwstatus(apm_pwstatus_t app) 619{ 620 struct apm_softc *sc = &apm_softc; 621 622 if (app->ap_device != PMDV_ALLDEV && 623 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL)) 624 return 1; 625 626 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 627 sc->bios.r.ebx = app->ap_device; 628 sc->bios.r.ecx = 0; 629 sc->bios.r.edx = 0xffff; /* default to unknown battery time */ 630 631 if (apm_bioscall()) 632 return 1; 633 634 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff; 635 app->ap_batt_stat = sc->bios.r.ebx & 0xff; 636 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff; 637 app->ap_batt_life = sc->bios.r.ecx & 0xff; 638 sc->bios.r.edx &= 0xffff; 639 if (apm_swab_batt_minutes) 640 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000; 641 if (sc->bios.r.edx == 0xffff) /* Time is unknown */ 642 app->ap_batt_time = -1; 643 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */ 644 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60; 645 else /* Time is in seconds */ 646 app->ap_batt_time = sc->bios.r.edx; 647 648 return 0; 649} 650 651 652/* get APM information */ 653static int 654apm_get_info(apm_info_t aip) 655{ 656 struct apm_softc *sc = &apm_softc; 657 struct apm_pwstatus aps; 658 659 bzero(&aps, sizeof(aps)); 660 aps.ap_device = PMDV_ALLDEV; 661 if (apm_get_pwstatus(&aps)) 662 return 1; 663 664 aip->ai_infoversion = 1; 665 aip->ai_acline = aps.ap_acline; 666 aip->ai_batt_stat = aps.ap_batt_stat; 667 aip->ai_batt_life = aps.ap_batt_life; 668 aip->ai_batt_time = aps.ap_batt_time; 669 aip->ai_major = (u_int)sc->majorversion; 670 aip->ai_minor = (u_int)sc->minorversion; 671 aip->ai_status = (u_int)sc->active; 672 673 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 674 sc->bios.r.ebx = 0; 675 sc->bios.r.ecx = 0; 676 sc->bios.r.edx = 0; 677 if (apm_bioscall()) { 678 aip->ai_batteries = -1; /* Unknown */ 679 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 680 } else { 681 aip->ai_batteries = sc->bios.r.ebx & 0xff; 682 aip->ai_capabilities = sc->bios.r.ecx & 0xf; 683 } 684 685 bzero(aip->ai_spare, sizeof aip->ai_spare); 686 687 return 0; 688} 689 690 691/* inform APM BIOS that CPU is idle */ 692void 693apm_cpu_idle(void) 694{ 695 struct apm_softc *sc = &apm_softc; 696 697 if (sc->active) { 698 699 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE; 700 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 701 (void) apm_bioscall(); 702 } 703 /* 704 * Some APM implementation halts CPU in BIOS, whenever 705 * "CPU-idle" function are invoked, but swtch() of 706 * FreeBSD halts CPU, therefore, CPU is halted twice 707 * in the sched loop. It makes the interrupt latency 708 * terribly long and be able to cause a serious problem 709 * in interrupt processing. We prevent it by removing 710 * "hlt" operation from swtch() and managed it under 711 * APM driver. 712 */ 713 if (!sc->active || sc->always_halt_cpu) 714 halt(); /* wait for interrupt */ 715} 716 717/* inform APM BIOS that CPU is busy */ 718void 719apm_cpu_busy(void) 720{ 721 struct apm_softc *sc = &apm_softc; 722 723 /* 724 * The APM specification says this is only necessary if your BIOS 725 * slows down the processor in the idle task, otherwise it's not 726 * necessary. 727 */ 728 if (sc->slow_idle_cpu && sc->active) { 729 730 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY; 731 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 732 apm_bioscall(); 733 } 734} 735 736 737/* 738 * APM timeout routine: 739 * 740 * This routine is automatically called by timer once per second. 741 */ 742 743static void 744apm_timeout(void *dummy) 745{ 746 struct apm_softc *sc = &apm_softc; 747 748 if (apm_op_inprog) 749 apm_lastreq_notify(); 750 751 if (sc->standbys && sc->standby_countdown-- <= 0) 752 apm_do_standby(); 753 754 if (sc->suspends && sc->suspend_countdown-- <= 0) 755 apm_do_suspend(); 756 757 if (!sc->bios_busy) 758 apm_processevent(); 759 760 if (sc->active == 1) 761 /* Run slightly more oftan than 1 Hz */ 762 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1); 763} 764 765/* enable APM BIOS */ 766static void 767apm_event_enable(void) 768{ 769 struct apm_softc *sc = &apm_softc; 770 771 APM_DPRINT("called apm_event_enable()\n"); 772 if (sc->initialized) { 773 sc->active = 1; 774 apm_timeout(sc); 775 } 776} 777 778/* disable APM BIOS */ 779static void 780apm_event_disable(void) 781{ 782 struct apm_softc *sc = &apm_softc; 783 784 APM_DPRINT("called apm_event_disable()\n"); 785 if (sc->initialized) { 786 untimeout(apm_timeout, NULL, apm_timeout_ch); 787 sc->active = 0; 788 } 789} 790 791/* halt CPU in scheduling loop */ 792static void 793apm_halt_cpu(void) 794{ 795 struct apm_softc *sc = &apm_softc; 796 797 if (sc->initialized) 798 sc->always_halt_cpu = 1; 799} 800 801/* don't halt CPU in scheduling loop */ 802static void 803apm_not_halt_cpu(void) 804{ 805 struct apm_softc *sc = &apm_softc; 806 807 if (sc->initialized) 808 sc->always_halt_cpu = 0; 809} 810 811/* device driver definitions */ 812 813/* 814 * Module event 815 */ 816 817static int 818apm_modevent(struct module *mod, int event, void *junk) 819{ 820 821 switch (event) { 822 case MOD_LOAD: 823 if (!cold) 824 return (EPERM); 825 break; 826 case MOD_UNLOAD: 827 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM) 828 return (EBUSY); 829 break; 830 default: 831 break; 832 } 833 834 return (0); 835} 836 837/* 838 * Create "connection point" 839 */ 840static void 841apm_identify(driver_t *driver, device_t parent) 842{ 843 device_t child; 844 845 if (!cold) { 846 printf("Don't load this driver from userland!!\n"); 847 return; 848 } 849 850 if (resource_disabled("apm", 0)) 851 return; 852 853 child = BUS_ADD_CHILD(parent, 0, "apm", 0); 854 if (child == NULL) 855 panic("apm_identify"); 856} 857 858/* 859 * probe for APM BIOS 860 */ 861static int 862apm_probe(device_t dev) 863{ 864#define APM_KERNBASE KERNBASE 865 struct vm86frame vmf; 866 struct apm_softc *sc = &apm_softc; 867 int flags; 868#ifdef PC98 869 int rid; 870#endif 871 872 device_set_desc(dev, "APM BIOS"); 873 if (device_get_unit(dev) > 0) { 874 printf("apm: Only one APM driver supported.\n"); 875 return ENXIO; 876 } 877 878 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 879 power_pm_get_type() != POWER_PM_TYPE_APM) { 880 printf("apm: Other PM system enabled.\n"); 881 return ENXIO; 882 } 883 884 if (resource_int_value("apm", 0, "flags", &flags) != 0) 885 flags = 0; 886 887 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 888 bzero(&apm_softc, sizeof(apm_softc)); 889 vmf.vmf_ah = APM_BIOS; 890 vmf.vmf_al = APM_INSTCHECK; 891 vmf.vmf_bx = 0; 892 if (vm86_intcall(APM_INT, &vmf)) 893 return ENXIO; /* APM not found */ 894 if (vmf.vmf_bx != 0x504d) { 895 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); 896 return ENXIO; 897 } 898 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { 899 printf("apm: protected mode connections are not supported\n"); 900 return ENXIO; 901 } 902 903 apm_version = vmf.vmf_ax; 904 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); 905 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); 906 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); 907 908 vmf.vmf_ah = APM_BIOS; 909 vmf.vmf_al = APM_DISCONNECT; 910 vmf.vmf_bx = 0; 911 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ 912 913#ifdef PC98 914 /* PC98 have bogos APM 32bit BIOS */ 915 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0) 916 return ENXIO; 917 rid = 0; 918 bus_set_resource(dev, SYS_RES_IOPORT, rid, 919 APM_NECSMM_PORT, APM_NECSMM_PORTSZ); 920 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 921 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 922 if (sc->sc_res == NULL) { 923 printf("apm: cannot open NEC smm device\n"); 924 return ENXIO; 925 } 926 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res); 927 928 vmf.vmf_ah = APM_BIOS; 929 vmf.vmf_al = APM_PROT32CONNECT; 930 vmf.vmf_bx = 0; 931 if (vm86_intcall(APM_INT, &vmf)) { 932 printf("apm: 32-bit connection error.\n"); 933 return (ENXIO); 934 } 935 936 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 937 sc->bios.seg.code32.limit = 0xffff; 938 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 939 sc->bios.seg.code16.limit = 0xffff; 940 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 941 sc->bios.seg.data.limit = 0xffff; 942 sc->bios.entry = vmf.vmf_ebx; 943 sc->connectmode = APM_PROT32CONNECT; 944#else 945 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 946 vmf.vmf_ah = APM_BIOS; 947 vmf.vmf_al = APM_PROT32CONNECT; 948 vmf.vmf_bx = 0; 949 if (vm86_intcall(APM_INT, &vmf)) { 950 printf("apm: 32-bit connection error.\n"); 951 return (ENXIO); 952 } 953 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 954 sc->bios.seg.code32.limit = 0xffff; 955 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 956 sc->bios.seg.code16.limit = 0xffff; 957 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 958 sc->bios.seg.data.limit = 0xffff; 959 sc->bios.entry = vmf.vmf_ebx; 960 sc->connectmode = APM_PROT32CONNECT; 961 } else { 962 /* use 16-bit connection */ 963 vmf.vmf_ah = APM_BIOS; 964 vmf.vmf_al = APM_PROT16CONNECT; 965 vmf.vmf_bx = 0; 966 if (vm86_intcall(APM_INT, &vmf)) { 967 printf("apm: 16-bit connection error.\n"); 968 return (ENXIO); 969 } 970 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 971 sc->bios.seg.code16.limit = 0xffff; 972 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 973 sc->bios.seg.data.limit = 0xffff; 974 sc->bios.entry = vmf.vmf_bx; 975 sc->connectmode = APM_PROT16CONNECT; 976 } 977#endif 978 return(0); 979} 980 981 982/* 983 * return 0 if the user will notice and handle the event, 984 * return 1 if the kernel driver should do so. 985 */ 986static int 987apm_record_event(struct apm_softc *sc, u_int event_type) 988{ 989 struct apm_event_info *evp; 990 991 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 992 return 1; /* no user waiting */ 993 if (sc->event_count == APM_NEVENTS) 994 return 1; /* overflow */ 995 if (sc->event_filter[event_type] == 0) 996 return 1; /* not registered */ 997 evp = &sc->event_list[sc->event_ptr]; 998 sc->event_count++; 999 sc->event_ptr++; 1000 sc->event_ptr %= APM_NEVENTS; 1001 evp->type = event_type; 1002 evp->index = ++apm_evindex; 1003 selwakeuppri(&sc->sc_rsel, PZERO); 1004 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 1005} 1006 1007/* Power profile */ 1008static void 1009apm_power_profile(struct apm_softc *sc) 1010{ 1011 int state; 1012 struct apm_info info; 1013 static int apm_acline = 0; 1014 1015 if (apm_get_info(&info)) 1016 return; 1017 1018 if (apm_acline != info.ai_acline) { 1019 apm_acline = info.ai_acline; 1020 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY; 1021 power_profile_set_state(state); 1022 } 1023} 1024 1025/* Process APM event */ 1026static void 1027apm_processevent(void) 1028{ 1029 int apm_event; 1030 struct apm_softc *sc = &apm_softc; 1031 1032#define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 1033 APM_DPRINT("Received APM Event: " #symbol "\n"); 1034 1035 do { 1036 apm_event = apm_getevent(); 1037 switch (apm_event) { 1038 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 1039 if (apm_op_inprog == 0) { 1040 apm_op_inprog++; 1041 if (apm_record_event(sc, apm_event)) { 1042 apm_suspend(PMST_STANDBY); 1043 } 1044 } 1045 break; 1046 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); 1047 if (apm_op_inprog == 0) { 1048 apm_op_inprog++; 1049 if (apm_record_event(sc, apm_event)) { 1050 apm_suspend(PMST_STANDBY); 1051 } 1052 } 1053 break; 1054 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 1055 apm_lastreq_notify(); 1056 if (apm_op_inprog == 0) { 1057 apm_op_inprog++; 1058 if (apm_record_event(sc, apm_event)) { 1059 apm_do_suspend(); 1060 } 1061 } 1062 return; /* XXX skip the rest */ 1063 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 1064 apm_lastreq_notify(); 1065 if (apm_op_inprog == 0) { 1066 apm_op_inprog++; 1067 if (apm_record_event(sc, apm_event)) { 1068 apm_do_suspend(); 1069 } 1070 } 1071 return; /* XXX skip the rest */ 1072 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 1073 apm_do_suspend(); 1074 break; 1075 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 1076 apm_record_event(sc, apm_event); 1077 apm_resume(); 1078 break; 1079 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 1080 apm_record_event(sc, apm_event); 1081 apm_resume(); 1082 break; 1083 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 1084 apm_record_event(sc, apm_event); 1085 break; 1086 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 1087 if (apm_record_event(sc, apm_event)) { 1088 apm_battery_low(); 1089 apm_suspend(PMST_SUSPEND); 1090 } 1091 break; 1092 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 1093 apm_record_event(sc, apm_event); 1094 apm_power_profile(sc); 1095 break; 1096 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 1097 apm_record_event(sc, apm_event); 1098 inittodr(0); /* adjust time to RTC */ 1099 break; 1100 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); 1101 apm_record_event(sc, apm_event); 1102 apm_power_profile(sc); 1103 break; 1104 case PMEV_NOEVENT: 1105 break; 1106 default: 1107 printf("Unknown Original APM Event 0x%x\n", apm_event); 1108 break; 1109 } 1110 } while (apm_event != PMEV_NOEVENT); 1111#ifdef PC98 1112 apm_disable_smm(sc); 1113#endif 1114} 1115 1116/* 1117 * Attach APM: 1118 * 1119 * Initialize APM driver 1120 */ 1121 1122static int 1123apm_attach(device_t dev) 1124{ 1125 struct apm_softc *sc = &apm_softc; 1126 int flags; 1127 int drv_version; 1128#ifdef PC98 1129 int rid; 1130#endif 1131 1132 if (resource_int_value("apm", 0, "flags", &flags) != 0) 1133 flags = 0; 1134 1135 if (flags & 0x20) 1136 statclock_disable = 1; 1137 1138 sc->initialized = 0; 1139 1140 /* Must be externally enabled */ 1141 sc->active = 0; 1142 1143 /* Always call HLT in idle loop */ 1144 sc->always_halt_cpu = 1; 1145 1146 getenv_int("debug.apm_debug", &apm_debug); 1147 1148 /* print bootstrap messages */ 1149 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version); 1150 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n", 1151 sc->bios.seg.code16.base, sc->bios.seg.data.base); 1152 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 1153 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 1154 is_enabled(!sc->disabled)); 1155 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n", 1156 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 1157 1158#ifdef PC98 1159 rid = 0; 1160 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1161 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 1162 if (sc->sc_res == NULL) 1163 panic("%s: counldn't map I/O ports", device_get_name(dev)); 1164 sc->sc_iot = rman_get_bustag(sc->sc_res); 1165 sc->sc_ioh = rman_get_bushandle(sc->sc_res); 1166 1167 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110) 1168 apm_necsmm_addr = APM_NECSMM_PORT; 1169 else 1170 apm_necsmm_addr = 0; 1171 apm_necsmm_mask = ~APM_NECSMM_EN; 1172#endif /* PC98 */ 1173 1174 /* 1175 * In one test, apm bios version was 1.02; an attempt to register 1176 * a 1.04 driver resulted in a 1.00 connection! Registering a 1177 * 1.02 driver resulted in a 1.02 connection. 1178 */ 1179 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 1180 for (; drv_version > 0x100; drv_version--) 1181 if (apm_driver_version(drv_version) == 0) 1182 break; 1183 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 1184 ((drv_version & 0x000f) >> 0); 1185 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 1186 ((apm_version & 0x0f00) >> 8); 1187 1188 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1189 1190 if (sc->intversion >= INTVERSION(1, 1)) 1191 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1192 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n", 1193 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 1194 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 1195 sc->majorversion, sc->minorversion); 1196 1197 1198 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1199 /* enable power management */ 1200 if (sc->disabled) { 1201 if (apm_enable_disable_pm(1)) { 1202 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n", 1203 (sc->bios.r.eax >> 8) & 0xff); 1204 } 1205 } 1206 1207 /* engage power managment (APM 1.1 or later) */ 1208 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1209 if (apm_engage_disengage_pm(1)) { 1210 APM_DPRINT("apm: *Warning* engage function failed err=[%x]", 1211 (sc->bios.r.eax >> 8) & 0xff); 1212 APM_DPRINT(" (Docked or using external power?).\n"); 1213 } 1214 } 1215 1216 /* Power the system off using APM */ 1217 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 1218 SHUTDOWN_PRI_LAST); 1219 1220 /* Register APM again to pass the correct argument of pm_func. */ 1221 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc); 1222 1223 sc->initialized = 1; 1224 sc->suspending = 0; 1225 1226 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm"); 1227 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl"); 1228 return 0; 1229} 1230 1231static int 1232apmopen(dev_t dev, int flag, int fmt, struct thread *td) 1233{ 1234 struct apm_softc *sc = &apm_softc; 1235 int ctl = APMDEV(dev); 1236 1237 if (!sc->initialized) 1238 return (ENXIO); 1239 1240 switch (ctl) { 1241 case APMDEV_CTL: 1242 if (!(flag & FWRITE)) 1243 return EINVAL; 1244 if (sc->sc_flags & SCFLAG_OCTL) 1245 return EBUSY; 1246 sc->sc_flags |= SCFLAG_OCTL; 1247 bzero(sc->event_filter, sizeof sc->event_filter); 1248 break; 1249 case APMDEV_NORMAL: 1250 sc->sc_flags |= SCFLAG_ONORMAL; 1251 break; 1252 default: 1253 return ENXIO; 1254 break; 1255 } 1256 return 0; 1257} 1258 1259static int 1260apmclose(dev_t dev, int flag, int fmt, struct thread *td) 1261{ 1262 struct apm_softc *sc = &apm_softc; 1263 int ctl = APMDEV(dev); 1264 1265 switch (ctl) { 1266 case APMDEV_CTL: 1267 apm_lastreq_rejected(); 1268 sc->sc_flags &= ~SCFLAG_OCTL; 1269 bzero(sc->event_filter, sizeof sc->event_filter); 1270 break; 1271 case APMDEV_NORMAL: 1272 sc->sc_flags &= ~SCFLAG_ONORMAL; 1273 break; 1274 } 1275 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1276 sc->event_count = 0; 1277 sc->event_ptr = 0; 1278 } 1279 return 0; 1280} 1281 1282static int 1283apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1284{ 1285 struct apm_softc *sc = &apm_softc; 1286 struct apm_bios_arg *args; 1287 int error = 0; 1288 int ret; 1289 int newstate; 1290 1291 if (!sc->initialized) 1292 return (ENXIO); 1293 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd); 1294 switch (cmd) { 1295 case APMIO_SUSPEND: 1296 if (!(flag & FWRITE)) 1297 return (EPERM); 1298 if (sc->active) 1299 apm_suspend(PMST_SUSPEND); 1300 else 1301 error = EINVAL; 1302 break; 1303 1304 case APMIO_STANDBY: 1305 if (!(flag & FWRITE)) 1306 return (EPERM); 1307 if (sc->active) 1308 apm_suspend(PMST_STANDBY); 1309 else 1310 error = EINVAL; 1311 break; 1312 1313 case APMIO_GETINFO_OLD: 1314 { 1315 struct apm_info info; 1316 apm_info_old_t aiop; 1317 1318 if (apm_get_info(&info)) 1319 error = ENXIO; 1320 aiop = (apm_info_old_t)addr; 1321 aiop->ai_major = info.ai_major; 1322 aiop->ai_minor = info.ai_minor; 1323 aiop->ai_acline = info.ai_acline; 1324 aiop->ai_batt_stat = info.ai_batt_stat; 1325 aiop->ai_batt_life = info.ai_batt_life; 1326 aiop->ai_status = info.ai_status; 1327 } 1328 break; 1329 case APMIO_GETINFO: 1330 if (apm_get_info((apm_info_t)addr)) 1331 error = ENXIO; 1332 break; 1333 case APMIO_GETPWSTATUS: 1334 if (apm_get_pwstatus((apm_pwstatus_t)addr)) 1335 error = ENXIO; 1336 break; 1337 case APMIO_ENABLE: 1338 if (!(flag & FWRITE)) 1339 return (EPERM); 1340 apm_event_enable(); 1341 break; 1342 case APMIO_DISABLE: 1343 if (!(flag & FWRITE)) 1344 return (EPERM); 1345 apm_event_disable(); 1346 break; 1347 case APMIO_HALTCPU: 1348 if (!(flag & FWRITE)) 1349 return (EPERM); 1350 apm_halt_cpu(); 1351 break; 1352 case APMIO_NOTHALTCPU: 1353 if (!(flag & FWRITE)) 1354 return (EPERM); 1355 apm_not_halt_cpu(); 1356 break; 1357 case APMIO_DISPLAY: 1358 if (!(flag & FWRITE)) 1359 return (EPERM); 1360 newstate = *(int *)addr; 1361 if (apm_display(newstate)) 1362 error = ENXIO; 1363 break; 1364 case APMIO_BIOS: 1365 if (!(flag & FWRITE)) 1366 return (EPERM); 1367 /* XXX compatibility with the old interface */ 1368 args = (struct apm_bios_arg *)addr; 1369 sc->bios.r.eax = args->eax; 1370 sc->bios.r.ebx = args->ebx; 1371 sc->bios.r.ecx = args->ecx; 1372 sc->bios.r.edx = args->edx; 1373 sc->bios.r.esi = args->esi; 1374 sc->bios.r.edi = args->edi; 1375 if ((ret = apm_bioscall())) { 1376 /* 1377 * Return code 1 means bios call was unsuccessful. 1378 * Error code is stored in %ah. 1379 * Return code -1 means bios call was unsupported 1380 * in the APM BIOS version. 1381 */ 1382 if (ret == -1) { 1383 error = EINVAL; 1384 } 1385 } else { 1386 /* 1387 * Return code 0 means bios call was successful. 1388 * We need only %al and can discard %ah. 1389 */ 1390 sc->bios.r.eax &= 0xff; 1391 } 1392 args->eax = sc->bios.r.eax; 1393 args->ebx = sc->bios.r.ebx; 1394 args->ecx = sc->bios.r.ecx; 1395 args->edx = sc->bios.r.edx; 1396 args->esi = sc->bios.r.esi; 1397 args->edi = sc->bios.r.edi; 1398 break; 1399 default: 1400 error = EINVAL; 1401 break; 1402 } 1403 1404 /* for /dev/apmctl */ 1405 if (APMDEV(dev) == APMDEV_CTL) { 1406 struct apm_event_info *evp; 1407 int i; 1408 1409 error = 0; 1410 switch (cmd) { 1411 case APMIO_NEXTEVENT: 1412 if (!sc->event_count) { 1413 error = EAGAIN; 1414 } else { 1415 evp = (struct apm_event_info *)addr; 1416 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1417 i %= APM_NEVENTS; 1418 *evp = sc->event_list[i]; 1419 sc->event_count--; 1420 } 1421 break; 1422 case APMIO_REJECTLASTREQ: 1423 if (apm_lastreq_rejected()) { 1424 error = EINVAL; 1425 } 1426 break; 1427 default: 1428 error = EINVAL; 1429 break; 1430 } 1431 } 1432 1433 return error; 1434} 1435 1436static int 1437apmwrite(dev_t dev, struct uio *uio, int ioflag) 1438{ 1439 struct apm_softc *sc = &apm_softc; 1440 u_int event_type; 1441 int error; 1442 u_char enabled; 1443 1444 if (APMDEV(dev) != APMDEV_CTL) 1445 return(ENODEV); 1446 if (uio->uio_resid != sizeof(u_int)) 1447 return(E2BIG); 1448 1449 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1450 return(error); 1451 1452 if (event_type < 0 || event_type >= APM_NPMEV) 1453 return(EINVAL); 1454 1455 if (sc->event_filter[event_type] == 0) { 1456 enabled = 1; 1457 } else { 1458 enabled = 0; 1459 } 1460 sc->event_filter[event_type] = enabled; 1461 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1462 1463 return uio->uio_resid; 1464} 1465 1466static int 1467apmpoll(dev_t dev, int events, struct thread *td) 1468{ 1469 struct apm_softc *sc = &apm_softc; 1470 int revents = 0; 1471 1472 if (events & (POLLIN | POLLRDNORM)) { 1473 if (sc->event_count) { 1474 revents |= events & (POLLIN | POLLRDNORM); 1475 } else { 1476 selrecord(td, &sc->sc_rsel); 1477 } 1478 } 1479 1480 return (revents); 1481} 1482 1483static device_method_t apm_methods[] = { 1484 /* Device interface */ 1485 DEVMETHOD(device_identify, apm_identify), 1486 DEVMETHOD(device_probe, apm_probe), 1487 DEVMETHOD(device_attach, apm_attach), 1488 1489 { 0, 0 } 1490}; 1491 1492static driver_t apm_driver = { 1493 "apm", 1494 apm_methods, 1495 1, /* no softc (XXX) */ 1496}; 1497 1498static devclass_t apm_devclass; 1499 1500DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0); 1501MODULE_VERSION(apm, 1); 1502 1503static int 1504apm_pm_func(u_long cmd, void *arg, ...) 1505{ 1506 int state, apm_state; 1507 int error; 1508 va_list ap; 1509 1510 error = 0; 1511 switch (cmd) { 1512 case POWER_CMD_SUSPEND: 1513 va_start(ap, arg); 1514 state = va_arg(ap, int); 1515 va_end(ap); 1516 1517 switch (state) { 1518 case POWER_SLEEP_STATE_STANDBY: 1519 apm_state = PMST_STANDBY; 1520 break; 1521 case POWER_SLEEP_STATE_SUSPEND: 1522 case POWER_SLEEP_STATE_HIBERNATE: 1523 apm_state = PMST_SUSPEND; 1524 break; 1525 default: 1526 error = EINVAL; 1527 goto out; 1528 } 1529 1530 apm_suspend(apm_state); 1531 break; 1532 1533 default: 1534 error = EINVAL; 1535 goto out; 1536 } 1537 1538out: 1539 return (error); 1540} 1541 1542static void 1543apm_pm_register(void *arg) 1544{ 1545 1546 if (!resource_disabled("apm", 0)) 1547 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL); 1548} 1549 1550SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0); 1551