apm.c revision 172836
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 172836 2007-10-20 23:23:23Z julian $"); 21 22#include <sys/param.h> 23#include <sys/systm.h> 24#include <sys/bus.h> 25#include <sys/clock.h> 26#include <sys/conf.h> 27#include <sys/condvar.h> 28#include <sys/eventhandler.h> 29#include <sys/fcntl.h> 30#include <sys/kernel.h> 31#include <sys/kthread.h> 32#include <sys/lock.h> 33#include <sys/module.h> 34#include <sys/mutex.h> 35#include <sys/poll.h> 36#include <sys/power.h> 37#include <sys/reboot.h> 38#include <sys/selinfo.h> 39#include <sys/signalvar.h> 40#include <sys/sysctl.h> 41#include <sys/syslog.h> 42#include <sys/time.h> 43#include <sys/uio.h> 44 45#include <machine/apm_bios.h> 46#include <machine/clock.h> 47#include <machine/endian.h> 48#include <machine/pc/bios.h> 49#include <machine/cpufunc.h> 50#include <machine/segments.h> 51#include <machine/stdarg.h> 52#include <machine/vm86.h> 53 54#include <machine/bus.h> 55#include <machine/resource.h> 56#include <sys/rman.h> 57 58#include <vm/vm.h> 59#include <vm/pmap.h> 60#include <vm/vm_param.h> 61 62#include <i386/bios/apm.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(dev) (minor(dev)&0x0f) 83#define APMDEV_NORMAL 0 84#define APMDEV_CTL 8 85 86#ifdef PC98 87extern int bios32_apm98(struct bios_regs *, u_int, u_short); 88 89/* PC98's SMM definition */ 90#define APM_NECSMM_PORT 0x6b8e 91#define APM_NECSMM_PORTSZ 1 92#define APM_NECSMM_EN 0x10 93static __inline void apm_enable_smm(struct apm_softc *); 94static __inline void apm_disable_smm(struct apm_softc *); 95int apm_necsmm_addr; 96u_int32_t apm_necsmm_mask; 97#endif 98 99static struct apmhook *hook[NAPM_HOOK]; /* XXX */ 100 101#define is_enabled(foo) ((foo) ? "enabled" : "disabled") 102 103/* Map version number to integer (keeps ordering of version numbers) */ 104#define INTVERSION(major, minor) ((major)*100 + (minor)) 105 106static d_open_t apmopen; 107static d_close_t apmclose; 108static d_write_t apmwrite; 109static d_ioctl_t apmioctl; 110static d_poll_t apmpoll; 111 112static struct cdevsw apm_cdevsw = { 113 .d_version = D_VERSION, 114 .d_flags = D_NEEDGIANT, 115 .d_open = apmopen, 116 .d_close = apmclose, 117 .d_write = apmwrite, 118 .d_ioctl = apmioctl, 119 .d_poll = apmpoll, 120 .d_name = "apm", 121}; 122 123static int apm_suspend_delay = 1; 124static int apm_standby_delay = 1; 125static int apm_swab_batt_minutes = 0; 126static int apm_debug = 0; 127 128#define APM_DPRINT(args...) do { \ 129 if (apm_debug) { \ 130 printf(args); \ 131 } \ 132} while (0) 133 134SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, ""); 135SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, ""); 136SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, ""); 137 138TUNABLE_INT("machdep.apm_swab_batt_minutes", &apm_swab_batt_minutes); 139SYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RW, 140 &apm_swab_batt_minutes, 0, "Byte swap battery time value."); 141 142#ifdef PC98 143static __inline void 144apm_enable_smm(sc) 145 struct apm_softc *sc; 146{ 147 bus_space_tag_t iot = sc->sc_iot; 148 bus_space_handle_t ioh = sc->sc_ioh; 149 if (apm_necsmm_addr != 0) 150 bus_space_write_1(iot, ioh, 0, 151 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask)); 152} 153 154static __inline void 155apm_disable_smm(sc) 156 struct apm_softc *sc; 157{ 158 bus_space_tag_t iot = sc->sc_iot; 159 bus_space_handle_t ioh = sc->sc_ioh; 160 if (apm_necsmm_addr != 0) 161 bus_space_write_1(iot, ioh, 0, 162 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask)); 163} 164#endif 165 166/* 167 * return 0 if the function successfull, 168 * return 1 if the function unsuccessfull, 169 * return -1 if the function unsupported. 170 */ 171static int 172apm_bioscall(void) 173{ 174 struct apm_softc *sc = &apm_softc; 175 int errno = 0; 176 u_int apm_func = sc->bios.r.eax & 0xff; 177 178 if (!apm_check_function_supported(sc->intversion, apm_func)) { 179 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n", 180 apm_func, sc->majorversion, sc->minorversion); 181 return (-1); 182 } 183 184 sc->bios_busy = 1; 185#ifdef PC98 186 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG); 187 if (bios32_apm98(&sc->bios.r, sc->bios.entry, 188 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0) 189 return 1; 190#else 191 if (sc->connectmode == APM_PROT32CONNECT) { 192 set_bios_selectors(&sc->bios.seg, 193 BIOSCODE_FLAG | BIOSDATA_FLAG); 194 errno = bios32(&sc->bios.r, 195 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL)); 196 } else { 197 errno = bios16(&sc->bios, NULL); 198 } 199#endif 200 sc->bios_busy = 0; 201 return (errno); 202} 203 204/* check whether APM function is supported (1) or not (0). */ 205static int 206apm_check_function_supported(u_int version, u_int func) 207{ 208 /* except driver version */ 209 if (func == APM_DRVVERSION) { 210 return (1); 211 } 212#ifdef PC98 213 if (func == APM_GETPWSTATUS) { 214 return (1); 215 } 216#endif 217 218 switch (version) { 219 case INTVERSION(1, 0): 220 if (func > APM_GETPMEVENT) { 221 return (0); /* not supported */ 222 } 223 break; 224 case INTVERSION(1, 1): 225 if (func > APM_ENGAGEDISENGAGEPM && 226 func < APM_OEMFUNC) { 227 return (0); /* not supported */ 228 } 229 break; 230 case INTVERSION(1, 2): 231 break; 232 } 233 234 return (1); /* supported */ 235} 236 237/* enable/disable power management */ 238static int 239apm_enable_disable_pm(int enable) 240{ 241 struct apm_softc *sc = &apm_softc; 242 243 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM; 244 245 if (sc->intversion >= INTVERSION(1, 1)) 246 sc->bios.r.ebx = PMDV_ALLDEV; 247 else 248 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */ 249 sc->bios.r.ecx = enable; 250 sc->bios.r.edx = 0; 251 return (apm_bioscall()); 252} 253 254/* register driver version (APM 1.1 or later) */ 255static int 256apm_driver_version(int version) 257{ 258 struct apm_softc *sc = &apm_softc; 259 260 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION; 261 sc->bios.r.ebx = 0x0; 262 sc->bios.r.ecx = version; 263 sc->bios.r.edx = 0; 264 265 if (apm_bioscall() == 0 && sc->bios.r.eax == version) 266 return (0); 267 268 /* Some old BIOSes don't return the connection version in %ax. */ 269 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION)) 270 return (0); 271 272 return (1); 273} 274 275/* engage/disengage power management (APM 1.1 or later) */ 276static int 277apm_engage_disengage_pm(int engage) 278{ 279 struct apm_softc *sc = &apm_softc; 280 281 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM; 282 sc->bios.r.ebx = PMDV_ALLDEV; 283 sc->bios.r.ecx = engage; 284 sc->bios.r.edx = 0; 285 return (apm_bioscall()); 286} 287 288/* get PM event */ 289static u_int 290apm_getevent(void) 291{ 292 struct apm_softc *sc = &apm_softc; 293 294 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT; 295 296 sc->bios.r.ebx = 0; 297 sc->bios.r.ecx = 0; 298 sc->bios.r.edx = 0; 299 if (apm_bioscall()) 300 return (PMEV_NOEVENT); 301 return (sc->bios.r.ebx & 0xffff); 302} 303 304/* suspend entire system */ 305static int 306apm_suspend_system(int state) 307{ 308 struct apm_softc *sc = &apm_softc; 309 310 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 311 sc->bios.r.ebx = PMDV_ALLDEV; 312 sc->bios.r.ecx = state; 313 sc->bios.r.edx = 0; 314 315#ifdef PC98 316 apm_disable_smm(sc); 317#endif 318 if (apm_bioscall()) { 319 printf("Entire system suspend failure: errcode = %d\n", 320 0xff & (sc->bios.r.eax >> 8)); 321 return 1; 322 } 323#ifdef PC98 324 apm_enable_smm(sc); 325#endif 326 return 0; 327} 328 329/* Display control */ 330/* 331 * Experimental implementation: My laptop machine can't handle this function 332 * If your laptop can control the display via APM, please inform me. 333 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 334 */ 335int 336apm_display(int newstate) 337{ 338 struct apm_softc *sc = &apm_softc; 339 340 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 341 sc->bios.r.ebx = PMDV_DISP0; 342 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 343 sc->bios.r.edx = 0; 344 if (apm_bioscall() == 0) { 345 return 0; 346 } 347 348 /* If failed, then try to blank all display devices instead. */ 349 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 350 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */ 351 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 352 sc->bios.r.edx = 0; 353 if (apm_bioscall() == 0) { 354 return 0; 355 } 356 printf("Display off failure: errcode = %d\n", 357 0xff & (sc->bios.r.eax >> 8)); 358 return 1; 359} 360 361/* 362 * Turn off the entire system. 363 */ 364static void 365apm_power_off(void *junk, int howto) 366{ 367 struct apm_softc *sc = &apm_softc; 368 369 /* Not halting powering off, or not active */ 370 if (!(howto & RB_POWEROFF) || !apm_softc.active) 371 return; 372 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 373 sc->bios.r.ebx = PMDV_ALLDEV; 374 sc->bios.r.ecx = PMST_OFF; 375 sc->bios.r.edx = 0; 376 (void) apm_bioscall(); 377} 378 379/* APM Battery low handler */ 380static void 381apm_battery_low(void) 382{ 383 printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 384} 385 386/* APM hook manager */ 387static struct apmhook * 388apm_add_hook(struct apmhook **list, struct apmhook *ah) 389{ 390 int s; 391 struct apmhook *p, *prev; 392 393 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name); 394 395 s = splhigh(); 396 if (ah == NULL) 397 panic("illegal apm_hook!"); 398 prev = NULL; 399 for (p = *list; p != NULL; prev = p, p = p->ah_next) 400 if (p->ah_order > ah->ah_order) 401 break; 402 403 if (prev == NULL) { 404 ah->ah_next = *list; 405 *list = ah; 406 } else { 407 ah->ah_next = prev->ah_next; 408 prev->ah_next = ah; 409 } 410 splx(s); 411 return ah; 412} 413 414static void 415apm_del_hook(struct apmhook **list, struct apmhook *ah) 416{ 417 int s; 418 struct apmhook *p, *prev; 419 420 s = splhigh(); 421 prev = NULL; 422 for (p = *list; p != NULL; prev = p, p = p->ah_next) 423 if (p == ah) 424 goto deleteit; 425 panic("Tried to delete unregistered apm_hook."); 426 goto nosuchnode; 427deleteit: 428 if (prev != NULL) 429 prev->ah_next = p->ah_next; 430 else 431 *list = p->ah_next; 432nosuchnode: 433 splx(s); 434} 435 436 437/* APM driver calls some functions automatically */ 438static void 439apm_execute_hook(struct apmhook *list) 440{ 441 struct apmhook *p; 442 443 for (p = list; p != NULL; p = p->ah_next) { 444 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name); 445 if ((*(p->ah_fun))(p->ah_arg)) 446 printf("Warning: APM hook \"%s\" failed", p->ah_name); 447 } 448} 449 450 451/* establish an apm hook */ 452struct apmhook * 453apm_hook_establish(int apmh, struct apmhook *ah) 454{ 455 if (apmh < 0 || apmh >= NAPM_HOOK) 456 return NULL; 457 458 return apm_add_hook(&hook[apmh], ah); 459} 460 461/* disestablish an apm hook */ 462void 463apm_hook_disestablish(int apmh, struct apmhook *ah) 464{ 465 if (apmh < 0 || apmh >= NAPM_HOOK) 466 return; 467 468 apm_del_hook(&hook[apmh], ah); 469} 470 471static int apm_record_event(struct apm_softc *, u_int); 472static void apm_processevent(void); 473 474static u_int apm_op_inprog = 0; 475 476static void 477apm_do_suspend(void) 478{ 479 struct apm_softc *sc = &apm_softc; 480 int error; 481 482 if (sc == NULL || sc->initialized == 0) 483 return; 484 485 apm_op_inprog = 0; 486 sc->suspends = sc->suspend_countdown = 0; 487 488 error = DEVICE_SUSPEND(root_bus); 489 if (error) 490 return; 491 492 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 return; 502} 503 504static void 505apm_do_standby(void) 506{ 507 struct apm_softc *sc = &apm_softc; 508 509 if (sc == NULL || sc->initialized == 0) 510 return; 511 512 apm_op_inprog = 0; 513 sc->standbys = sc->standby_countdown = 0; 514 515 /* 516 * As far as standby, we don't need to execute 517 * all of suspend hooks. 518 */ 519 if (apm_suspend_system(PMST_STANDBY) == 0) 520 apm_processevent(); 521 return; 522} 523 524static void 525apm_lastreq_notify(void) 526{ 527 struct apm_softc *sc = &apm_softc; 528 529 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 530 sc->bios.r.ebx = PMDV_ALLDEV; 531 sc->bios.r.ecx = PMST_LASTREQNOTIFY; 532 sc->bios.r.edx = 0; 533 apm_bioscall(); 534} 535 536static int 537apm_lastreq_rejected(void) 538{ 539 struct apm_softc *sc = &apm_softc; 540 541 if (apm_op_inprog == 0) { 542 return 1; /* no operation in progress */ 543 } 544 545 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 546 sc->bios.r.ebx = PMDV_ALLDEV; 547 sc->bios.r.ecx = PMST_LASTREQREJECT; 548 sc->bios.r.edx = 0; 549 550 if (apm_bioscall()) { 551 APM_DPRINT("apm_lastreq_rejected: failed\n"); 552 return 1; 553 } 554 apm_op_inprog = 0; 555 return 0; 556} 557 558/* 559 * Public interface to the suspend/resume: 560 * 561 * Execute suspend and resume hook before and after sleep, respectively. 562 * 563 */ 564 565void 566apm_suspend(int state) 567{ 568 struct apm_softc *sc = &apm_softc; 569 570 if (sc == NULL || sc->initialized == 0) 571 return; 572 573 switch (state) { 574 case PMST_SUSPEND: 575 if (sc->suspends) 576 return; 577 sc->suspends++; 578 sc->suspend_countdown = apm_suspend_delay; 579 break; 580 case PMST_STANDBY: 581 if (sc->standbys) 582 return; 583 sc->standbys++; 584 sc->standby_countdown = apm_standby_delay; 585 break; 586 default: 587 printf("apm_suspend: Unknown Suspend state 0x%x\n", state); 588 return; 589 } 590 591 apm_op_inprog++; 592 apm_lastreq_notify(); 593} 594 595static void 596apm_resume(void) 597{ 598 struct apm_softc *sc = &apm_softc; 599 600 if (sc == NULL || sc->initialized == 0 || sc->suspending == 0) 601 return; 602 603 sc->suspending = 0; 604 apm_execute_hook(hook[APM_HOOK_RESUME]); 605 DEVICE_RESUME(root_bus); 606 return; 607} 608 609 610/* get power status per battery */ 611static int 612apm_get_pwstatus(apm_pwstatus_t app) 613{ 614 struct apm_softc *sc = &apm_softc; 615 616 if (app->ap_device != PMDV_ALLDEV && 617 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL)) 618 return 1; 619 620 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 621 sc->bios.r.ebx = app->ap_device; 622 sc->bios.r.ecx = 0; 623 sc->bios.r.edx = 0xffff; /* default to unknown battery time */ 624 625 if (apm_bioscall()) 626 return 1; 627 628 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff; 629 app->ap_batt_stat = sc->bios.r.ebx & 0xff; 630 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff; 631 app->ap_batt_life = sc->bios.r.ecx & 0xff; 632 sc->bios.r.edx &= 0xffff; 633 if (apm_swab_batt_minutes) 634 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000; 635 if (sc->bios.r.edx == 0xffff) /* Time is unknown */ 636 app->ap_batt_time = -1; 637 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */ 638 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60; 639 else /* Time is in seconds */ 640 app->ap_batt_time = sc->bios.r.edx; 641 642 return 0; 643} 644 645 646/* get APM information */ 647static int 648apm_get_info(apm_info_t aip) 649{ 650 struct apm_softc *sc = &apm_softc; 651 struct apm_pwstatus aps; 652 653 bzero(&aps, sizeof(aps)); 654 aps.ap_device = PMDV_ALLDEV; 655 if (apm_get_pwstatus(&aps)) 656 return 1; 657 658 aip->ai_infoversion = 1; 659 aip->ai_acline = aps.ap_acline; 660 aip->ai_batt_stat = aps.ap_batt_stat; 661 aip->ai_batt_life = aps.ap_batt_life; 662 aip->ai_batt_time = aps.ap_batt_time; 663 aip->ai_major = (u_int)sc->majorversion; 664 aip->ai_minor = (u_int)sc->minorversion; 665 aip->ai_status = (u_int)sc->active; 666 667 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 668 sc->bios.r.ebx = 0; 669 sc->bios.r.ecx = 0; 670 sc->bios.r.edx = 0; 671 if (apm_bioscall()) { 672 aip->ai_batteries = 0xffffffff; /* Unknown */ 673 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 674 } else { 675 aip->ai_batteries = sc->bios.r.ebx & 0xff; 676 aip->ai_capabilities = sc->bios.r.ecx & 0xff; 677 } 678 679 bzero(aip->ai_spare, sizeof aip->ai_spare); 680 681 return 0; 682} 683 684 685/* inform APM BIOS that CPU is idle */ 686void 687apm_cpu_idle(void) 688{ 689 struct apm_softc *sc = &apm_softc; 690 691 if (sc->active) { 692 693 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE; 694 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 695 (void) apm_bioscall(); 696 } 697 /* 698 * Some APM implementation halts CPU in BIOS, whenever 699 * "CPU-idle" function are invoked, but swtch() of 700 * FreeBSD halts CPU, therefore, CPU is halted twice 701 * in the sched loop. It makes the interrupt latency 702 * terribly long and be able to cause a serious problem 703 * in interrupt processing. We prevent it by removing 704 * "hlt" operation from swtch() and managed it under 705 * APM driver. 706 */ 707 if (!sc->active || sc->always_halt_cpu) 708 halt(); /* wait for interrupt */ 709} 710 711/* inform APM BIOS that CPU is busy */ 712void 713apm_cpu_busy(void) 714{ 715 struct apm_softc *sc = &apm_softc; 716 717 /* 718 * The APM specification says this is only necessary if your BIOS 719 * slows down the processor in the idle task, otherwise it's not 720 * necessary. 721 */ 722 if (sc->slow_idle_cpu && sc->active) { 723 724 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY; 725 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 726 apm_bioscall(); 727 } 728} 729 730 731/* 732 * APM thread loop. 733 * 734 * This routine wakes up from time to time to deal with delaying the 735 * suspend of the system, or other events. 736 */ 737static void 738apm_event_thread(void *arg) 739{ 740 struct apm_softc *sc = &apm_softc; 741 742 sc->running = 1; 743 while (sc->active) { 744 if (apm_op_inprog) 745 apm_lastreq_notify(); 746 if (sc->standbys && sc->standby_countdown-- <= 0) 747 apm_do_standby(); 748 if (sc->suspends && sc->suspend_countdown-- <= 0) 749 apm_do_suspend(); 750 if (!sc->bios_busy) 751 apm_processevent(); 752 mtx_lock(&sc->mtx); 753 cv_timedwait(&sc->cv, &sc->mtx, 10 * hz / 9); 754 mtx_unlock(&sc->mtx); 755 } 756 sc->running = 0; 757 kproc_exit(0); 758} 759 760/* enable APM BIOS */ 761static void 762apm_event_enable(void) 763{ 764 struct apm_softc *sc = &apm_softc; 765 766 APM_DPRINT("called apm_event_enable()\n"); 767 768 if (sc == NULL || sc->initialized == 0) 769 return; 770 771 /* Start the thread */ 772 sc->active = 1; 773 if (kproc_create(apm_event_thread, sc, &sc->event_thread, 0, 0, 774 "apm worker")) 775 panic("Cannot create apm worker thread"); 776 777 return; 778} 779 780/* disable APM BIOS */ 781static void 782apm_event_disable(void) 783{ 784 struct apm_softc *sc = &apm_softc; 785 786 APM_DPRINT("called apm_event_disable()\n"); 787 788 if (sc == NULL || sc->initialized == 0) 789 return; 790 791 mtx_lock(&sc->mtx); 792 sc->active = 0; 793 while (sc->running) { 794 cv_broadcast(&sc->cv); 795 msleep(sc->event_thread, &sc->mtx, PWAIT, "apmdie", 0); 796 } 797 mtx_unlock(&sc->mtx); 798 sc->event_thread = NULL; 799 return; 800} 801 802/* halt CPU in scheduling loop */ 803static void 804apm_halt_cpu(void) 805{ 806 struct apm_softc *sc = &apm_softc; 807 808 if (sc == NULL || sc->initialized == 0) 809 return; 810 811 sc->always_halt_cpu = 1; 812 813 return; 814} 815 816/* don't halt CPU in scheduling loop */ 817static void 818apm_not_halt_cpu(void) 819{ 820 struct apm_softc *sc = &apm_softc; 821 822 if (sc == NULL || sc->initialized == 0) 823 return; 824 825 sc->always_halt_cpu = 0; 826 827 return; 828} 829 830/* device driver definitions */ 831 832/* 833 * Module event 834 */ 835 836static int 837apm_modevent(struct module *mod, int event, void *junk) 838{ 839 840 switch (event) { 841 case MOD_LOAD: 842 if (!cold) 843 return (EPERM); 844 break; 845 case MOD_UNLOAD: 846 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM) 847 return (EBUSY); 848 break; 849 default: 850 break; 851 } 852 853 return (0); 854} 855 856/* 857 * Create "connection point" 858 */ 859static void 860apm_identify(driver_t *driver, device_t parent) 861{ 862 device_t child; 863 864 if (!cold) { 865 printf("Don't load this driver from userland!!\n"); 866 return; 867 } 868 869 if (resource_disabled("apm", 0)) 870 return; 871 872 child = BUS_ADD_CHILD(parent, 0, "apm", 0); 873 if (child == NULL) 874 panic("apm_identify"); 875} 876 877/* 878 * probe for APM BIOS 879 */ 880static int 881apm_probe(device_t dev) 882{ 883#define APM_KERNBASE KERNBASE 884 struct vm86frame vmf; 885 struct apm_softc *sc = &apm_softc; 886#ifdef PC98 887 int rid; 888#endif 889 890 device_set_desc(dev, "APM BIOS"); 891 if (device_get_unit(dev) > 0) { 892 printf("apm: Only one APM driver supported.\n"); 893 return ENXIO; 894 } 895 896 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 897 power_pm_get_type() != POWER_PM_TYPE_APM) { 898 printf("apm: Other PM system enabled.\n"); 899 return ENXIO; 900 } 901 902 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 903 bzero(&apm_softc, sizeof(apm_softc)); 904 vmf.vmf_ah = APM_BIOS; 905 vmf.vmf_al = APM_INSTCHECK; 906 vmf.vmf_bx = 0; 907 if (vm86_intcall(APM_INT, &vmf)) 908 return ENXIO; /* APM not found */ 909 if (vmf.vmf_bx != 0x504d) { 910 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); 911 return ENXIO; 912 } 913 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { 914 printf("apm: protected mode connections are not supported\n"); 915 return ENXIO; 916 } 917 918 apm_version = vmf.vmf_ax; 919 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); 920 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); 921 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); 922 923 vmf.vmf_ah = APM_BIOS; 924 vmf.vmf_al = APM_DISCONNECT; 925 vmf.vmf_bx = 0; 926 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ 927 928#ifdef PC98 929 /* PC98 have bogos APM 32bit BIOS */ 930 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0) 931 return ENXIO; 932 rid = 0; 933 bus_set_resource(dev, SYS_RES_IOPORT, rid, 934 APM_NECSMM_PORT, APM_NECSMM_PORTSZ); 935 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 936 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 937 if (sc->sc_res == NULL) { 938 printf("apm: cannot open NEC smm device\n"); 939 return ENXIO; 940 } 941 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res); 942 943 vmf.vmf_ah = APM_BIOS; 944 vmf.vmf_al = APM_PROT32CONNECT; 945 vmf.vmf_bx = 0; 946 if (vm86_intcall(APM_INT, &vmf)) { 947 printf("apm: 32-bit connection error.\n"); 948 return (ENXIO); 949 } 950 951 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 952 sc->bios.seg.code32.limit = 0xffff; 953 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 954 sc->bios.seg.code16.limit = 0xffff; 955 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 956 sc->bios.seg.data.limit = 0xffff; 957 sc->bios.entry = vmf.vmf_ebx; 958 sc->connectmode = APM_PROT32CONNECT; 959#else 960 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 961 vmf.vmf_ah = APM_BIOS; 962 vmf.vmf_al = APM_PROT32CONNECT; 963 vmf.vmf_bx = 0; 964 if (vm86_intcall(APM_INT, &vmf)) { 965 printf("apm: 32-bit connection error.\n"); 966 return (ENXIO); 967 } 968 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 969 sc->bios.seg.code32.limit = 0xffff; 970 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 971 sc->bios.seg.code16.limit = 0xffff; 972 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 973 sc->bios.seg.data.limit = 0xffff; 974 sc->bios.entry = vmf.vmf_ebx; 975 sc->connectmode = APM_PROT32CONNECT; 976 } else { 977 /* use 16-bit connection */ 978 vmf.vmf_ah = APM_BIOS; 979 vmf.vmf_al = APM_PROT16CONNECT; 980 vmf.vmf_bx = 0; 981 if (vm86_intcall(APM_INT, &vmf)) { 982 printf("apm: 16-bit connection error.\n"); 983 return (ENXIO); 984 } 985 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 986 sc->bios.seg.code16.limit = 0xffff; 987 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 988 sc->bios.seg.data.limit = 0xffff; 989 sc->bios.entry = vmf.vmf_bx; 990 sc->connectmode = APM_PROT16CONNECT; 991 } 992#endif 993 return(0); 994} 995 996 997/* 998 * return 0 if the user will notice and handle the event, 999 * return 1 if the kernel driver should do so. 1000 */ 1001static int 1002apm_record_event(struct apm_softc *sc, u_int event_type) 1003{ 1004 struct apm_event_info *evp; 1005 1006 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 1007 return 1; /* no user waiting */ 1008 if (sc->event_count == APM_NEVENTS) 1009 return 1; /* overflow */ 1010 if (sc->event_filter[event_type] == 0) 1011 return 1; /* not registered */ 1012 evp = &sc->event_list[sc->event_ptr]; 1013 sc->event_count++; 1014 sc->event_ptr++; 1015 sc->event_ptr %= APM_NEVENTS; 1016 evp->type = event_type; 1017 evp->index = ++apm_evindex; 1018 selwakeuppri(&sc->sc_rsel, PZERO); 1019 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 1020} 1021 1022/* Power profile */ 1023static void 1024apm_power_profile(struct apm_softc *sc) 1025{ 1026 int state; 1027 struct apm_info info; 1028 static int apm_acline = 0; 1029 1030 if (apm_get_info(&info)) 1031 return; 1032 1033 if (apm_acline != info.ai_acline) { 1034 apm_acline = info.ai_acline; 1035 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY; 1036 power_profile_set_state(state); 1037 } 1038} 1039 1040/* Process APM event */ 1041static void 1042apm_processevent(void) 1043{ 1044 int apm_event; 1045 struct apm_softc *sc = &apm_softc; 1046 1047#define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 1048 APM_DPRINT("Received APM Event: " #symbol "\n"); 1049 1050 do { 1051 apm_event = apm_getevent(); 1052 switch (apm_event) { 1053 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 1054 if (apm_op_inprog == 0) { 1055 apm_op_inprog++; 1056 if (apm_record_event(sc, apm_event)) { 1057 apm_suspend(PMST_STANDBY); 1058 } 1059 } 1060 break; 1061 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); 1062 if (apm_op_inprog == 0) { 1063 apm_op_inprog++; 1064 if (apm_record_event(sc, apm_event)) { 1065 apm_suspend(PMST_STANDBY); 1066 } 1067 } 1068 break; 1069 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 1070 apm_lastreq_notify(); 1071 if (apm_op_inprog == 0) { 1072 apm_op_inprog++; 1073 if (apm_record_event(sc, apm_event)) { 1074 apm_do_suspend(); 1075 } 1076 } 1077 return; /* XXX skip the rest */ 1078 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 1079 apm_lastreq_notify(); 1080 if (apm_op_inprog == 0) { 1081 apm_op_inprog++; 1082 if (apm_record_event(sc, apm_event)) { 1083 apm_do_suspend(); 1084 } 1085 } 1086 return; /* XXX skip the rest */ 1087 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 1088 apm_do_suspend(); 1089 break; 1090 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 1091 apm_record_event(sc, apm_event); 1092 apm_resume(); 1093 break; 1094 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 1095 apm_record_event(sc, apm_event); 1096 apm_resume(); 1097 break; 1098 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 1099 apm_record_event(sc, apm_event); 1100 break; 1101 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 1102 if (apm_record_event(sc, apm_event)) { 1103 apm_battery_low(); 1104 apm_suspend(PMST_SUSPEND); 1105 } 1106 break; 1107 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 1108 apm_record_event(sc, apm_event); 1109 apm_power_profile(sc); 1110 break; 1111 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 1112 apm_record_event(sc, apm_event); 1113 inittodr(0); /* adjust time to RTC */ 1114 break; 1115 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); 1116 apm_record_event(sc, apm_event); 1117 apm_power_profile(sc); 1118 break; 1119 case PMEV_NOEVENT: 1120 break; 1121 default: 1122 printf("Unknown Original APM Event 0x%x\n", apm_event); 1123 break; 1124 } 1125 } while (apm_event != PMEV_NOEVENT); 1126#ifdef PC98 1127 apm_disable_smm(sc); 1128#endif 1129} 1130 1131/* 1132 * Attach APM: 1133 * 1134 * Initialize APM driver 1135 */ 1136 1137static int 1138apm_attach(device_t dev) 1139{ 1140 struct apm_softc *sc = &apm_softc; 1141 int drv_version; 1142#ifdef PC98 1143 int rid; 1144#endif 1145 mtx_init(&sc->mtx, device_get_nameunit(dev), "apm", MTX_DEF); 1146 cv_init(&sc->cv, "cbb cv"); 1147 1148 if (device_get_flags(dev) & 0x20) 1149 statclock_disable = 1; 1150 1151 sc->initialized = 0; 1152 1153 /* Must be externally enabled */ 1154 sc->active = 0; 1155 1156 /* Always call HLT in idle loop */ 1157 sc->always_halt_cpu = 1; 1158 1159 getenv_int("debug.apm_debug", &apm_debug); 1160 1161 /* print bootstrap messages */ 1162 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version); 1163 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n", 1164 sc->bios.seg.code16.base, sc->bios.seg.data.base); 1165 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 1166 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 1167 is_enabled(!sc->disabled)); 1168 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n", 1169 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 1170 1171#ifdef PC98 1172 rid = 0; 1173 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1174 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 1175 if (sc->sc_res == NULL) 1176 panic("%s: counldn't map I/O ports", device_get_name(dev)); 1177 sc->sc_iot = rman_get_bustag(sc->sc_res); 1178 sc->sc_ioh = rman_get_bushandle(sc->sc_res); 1179 1180 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110) 1181 apm_necsmm_addr = APM_NECSMM_PORT; 1182 else 1183 apm_necsmm_addr = 0; 1184 apm_necsmm_mask = ~APM_NECSMM_EN; 1185#endif /* PC98 */ 1186 1187 /* 1188 * In one test, apm bios version was 1.02; an attempt to register 1189 * a 1.04 driver resulted in a 1.00 connection! Registering a 1190 * 1.02 driver resulted in a 1.02 connection. 1191 */ 1192 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 1193 for (; drv_version > 0x100; drv_version--) 1194 if (apm_driver_version(drv_version) == 0) 1195 break; 1196 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 1197 ((drv_version & 0x000f) >> 0); 1198 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 1199 ((apm_version & 0x0f00) >> 8); 1200 1201 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1202 1203 if (sc->intversion >= INTVERSION(1, 1)) 1204 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1205 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n", 1206 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 1207 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 1208 sc->majorversion, sc->minorversion); 1209 1210 1211 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1212 /* enable power management */ 1213 if (sc->disabled) { 1214 if (apm_enable_disable_pm(1)) { 1215 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n", 1216 (sc->bios.r.eax >> 8) & 0xff); 1217 } 1218 } 1219 1220 /* engage power managment (APM 1.1 or later) */ 1221 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1222 if (apm_engage_disengage_pm(1)) { 1223 APM_DPRINT("apm: *Warning* engage function failed err=[%x]", 1224 (sc->bios.r.eax >> 8) & 0xff); 1225 APM_DPRINT(" (Docked or using external power?).\n"); 1226 } 1227 } 1228 1229 /* Power the system off using APM */ 1230 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 1231 SHUTDOWN_PRI_LAST); 1232 1233 /* Register APM again to pass the correct argument of pm_func. */ 1234 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc); 1235 1236 sc->initialized = 1; 1237 sc->suspending = 0; 1238 sc->running = 0; 1239 1240 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm"); 1241 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl"); 1242 return 0; 1243} 1244 1245static int 1246apmopen(struct cdev *dev, int flag, int fmt, struct thread *td) 1247{ 1248 struct apm_softc *sc = &apm_softc; 1249 int ctl = APMDEV(dev); 1250 1251 if (sc == NULL || sc->initialized == 0) 1252 return (ENXIO); 1253 1254 switch (ctl) { 1255 case APMDEV_CTL: 1256 if (!(flag & FWRITE)) 1257 return EINVAL; 1258 if (sc->sc_flags & SCFLAG_OCTL) 1259 return EBUSY; 1260 sc->sc_flags |= SCFLAG_OCTL; 1261 bzero(sc->event_filter, sizeof sc->event_filter); 1262 break; 1263 case APMDEV_NORMAL: 1264 sc->sc_flags |= SCFLAG_ONORMAL; 1265 break; 1266 default: 1267 return ENXIO; 1268 break; 1269 } 1270 return 0; 1271} 1272 1273static int 1274apmclose(struct cdev *dev, int flag, int fmt, struct thread *td) 1275{ 1276 struct apm_softc *sc = &apm_softc; 1277 int ctl = APMDEV(dev); 1278 1279 switch (ctl) { 1280 case APMDEV_CTL: 1281 apm_lastreq_rejected(); 1282 sc->sc_flags &= ~SCFLAG_OCTL; 1283 bzero(sc->event_filter, sizeof sc->event_filter); 1284 break; 1285 case APMDEV_NORMAL: 1286 sc->sc_flags &= ~SCFLAG_ONORMAL; 1287 break; 1288 } 1289 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1290 sc->event_count = 0; 1291 sc->event_ptr = 0; 1292 } 1293 return 0; 1294} 1295 1296static int 1297apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1298{ 1299 struct apm_softc *sc = &apm_softc; 1300 struct apm_bios_arg *args; 1301 int error = 0; 1302 int ret; 1303 int newstate; 1304 1305 if (sc == NULL || sc->initialized == 0) 1306 return (ENXIO); 1307 1308 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd); 1309 switch (cmd) { 1310 case APMIO_SUSPEND: 1311 if (!(flag & FWRITE)) 1312 return (EPERM); 1313 if (sc->active) 1314 apm_suspend(PMST_SUSPEND); 1315 else 1316 error = EINVAL; 1317 break; 1318 1319 case APMIO_STANDBY: 1320 if (!(flag & FWRITE)) 1321 return (EPERM); 1322 if (sc->active) 1323 apm_suspend(PMST_STANDBY); 1324 else 1325 error = EINVAL; 1326 break; 1327 1328 case APMIO_GETINFO_OLD: 1329 { 1330 struct apm_info info; 1331 apm_info_old_t aiop; 1332 1333 if (apm_get_info(&info)) 1334 error = ENXIO; 1335 aiop = (apm_info_old_t)addr; 1336 aiop->ai_major = info.ai_major; 1337 aiop->ai_minor = info.ai_minor; 1338 aiop->ai_acline = info.ai_acline; 1339 aiop->ai_batt_stat = info.ai_batt_stat; 1340 aiop->ai_batt_life = info.ai_batt_life; 1341 aiop->ai_status = info.ai_status; 1342 } 1343 break; 1344 case APMIO_GETINFO: 1345 if (apm_get_info((apm_info_t)addr)) 1346 error = ENXIO; 1347 break; 1348 case APMIO_GETPWSTATUS: 1349 if (apm_get_pwstatus((apm_pwstatus_t)addr)) 1350 error = ENXIO; 1351 break; 1352 case APMIO_ENABLE: 1353 if (!(flag & FWRITE)) 1354 return (EPERM); 1355 apm_event_enable(); 1356 break; 1357 case APMIO_DISABLE: 1358 if (!(flag & FWRITE)) 1359 return (EPERM); 1360 apm_event_disable(); 1361 break; 1362 case APMIO_HALTCPU: 1363 if (!(flag & FWRITE)) 1364 return (EPERM); 1365 apm_halt_cpu(); 1366 break; 1367 case APMIO_NOTHALTCPU: 1368 if (!(flag & FWRITE)) 1369 return (EPERM); 1370 apm_not_halt_cpu(); 1371 break; 1372 case APMIO_DISPLAY: 1373 if (!(flag & FWRITE)) 1374 return (EPERM); 1375 newstate = *(int *)addr; 1376 if (apm_display(newstate)) 1377 error = ENXIO; 1378 break; 1379 case APMIO_BIOS: 1380 if (!(flag & FWRITE)) 1381 return (EPERM); 1382 /* XXX compatibility with the old interface */ 1383 args = (struct apm_bios_arg *)addr; 1384 sc->bios.r.eax = args->eax; 1385 sc->bios.r.ebx = args->ebx; 1386 sc->bios.r.ecx = args->ecx; 1387 sc->bios.r.edx = args->edx; 1388 sc->bios.r.esi = args->esi; 1389 sc->bios.r.edi = args->edi; 1390 if ((ret = apm_bioscall())) { 1391 /* 1392 * Return code 1 means bios call was unsuccessful. 1393 * Error code is stored in %ah. 1394 * Return code -1 means bios call was unsupported 1395 * in the APM BIOS version. 1396 */ 1397 if (ret == -1) { 1398 error = EINVAL; 1399 } 1400 } else { 1401 /* 1402 * Return code 0 means bios call was successful. 1403 * We need only %al and can discard %ah. 1404 */ 1405 sc->bios.r.eax &= 0xff; 1406 } 1407 args->eax = sc->bios.r.eax; 1408 args->ebx = sc->bios.r.ebx; 1409 args->ecx = sc->bios.r.ecx; 1410 args->edx = sc->bios.r.edx; 1411 args->esi = sc->bios.r.esi; 1412 args->edi = sc->bios.r.edi; 1413 break; 1414 default: 1415 error = EINVAL; 1416 break; 1417 } 1418 1419 /* for /dev/apmctl */ 1420 if (APMDEV(dev) == APMDEV_CTL) { 1421 struct apm_event_info *evp; 1422 int i; 1423 1424 error = 0; 1425 switch (cmd) { 1426 case APMIO_NEXTEVENT: 1427 if (!sc->event_count) { 1428 error = EAGAIN; 1429 } else { 1430 evp = (struct apm_event_info *)addr; 1431 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1432 i %= APM_NEVENTS; 1433 *evp = sc->event_list[i]; 1434 sc->event_count--; 1435 } 1436 break; 1437 case APMIO_REJECTLASTREQ: 1438 if (apm_lastreq_rejected()) { 1439 error = EINVAL; 1440 } 1441 break; 1442 default: 1443 error = EINVAL; 1444 break; 1445 } 1446 } 1447 1448 return error; 1449} 1450 1451static int 1452apmwrite(struct cdev *dev, struct uio *uio, int ioflag) 1453{ 1454 struct apm_softc *sc = &apm_softc; 1455 u_int event_type; 1456 int error; 1457 u_char enabled; 1458 1459 if (APMDEV(dev) != APMDEV_CTL) 1460 return(ENODEV); 1461 if (uio->uio_resid != sizeof(u_int)) 1462 return(E2BIG); 1463 1464 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1465 return(error); 1466 1467 if (event_type < 0 || event_type >= APM_NPMEV) 1468 return(EINVAL); 1469 1470 if (sc->event_filter[event_type] == 0) { 1471 enabled = 1; 1472 } else { 1473 enabled = 0; 1474 } 1475 sc->event_filter[event_type] = enabled; 1476 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1477 1478 return uio->uio_resid; 1479} 1480 1481static int 1482apmpoll(struct cdev *dev, int events, struct thread *td) 1483{ 1484 struct apm_softc *sc = &apm_softc; 1485 int revents = 0; 1486 1487 if (events & (POLLIN | POLLRDNORM)) { 1488 if (sc->event_count) { 1489 revents |= events & (POLLIN | POLLRDNORM); 1490 } else { 1491 selrecord(td, &sc->sc_rsel); 1492 } 1493 } 1494 1495 return (revents); 1496} 1497 1498static device_method_t apm_methods[] = { 1499 /* Device interface */ 1500 DEVMETHOD(device_identify, apm_identify), 1501 DEVMETHOD(device_probe, apm_probe), 1502 DEVMETHOD(device_attach, apm_attach), 1503 1504 { 0, 0 } 1505}; 1506 1507static driver_t apm_driver = { 1508 "apm", 1509 apm_methods, 1510 1, /* no softc (XXX) */ 1511}; 1512 1513static devclass_t apm_devclass; 1514 1515DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0); 1516MODULE_VERSION(apm, 1); 1517 1518static int 1519apm_pm_func(u_long cmd, void *arg, ...) 1520{ 1521 int state, apm_state; 1522 int error; 1523 va_list ap; 1524 1525 error = 0; 1526 switch (cmd) { 1527 case POWER_CMD_SUSPEND: 1528 va_start(ap, arg); 1529 state = va_arg(ap, int); 1530 va_end(ap); 1531 1532 switch (state) { 1533 case POWER_SLEEP_STATE_STANDBY: 1534 apm_state = PMST_STANDBY; 1535 break; 1536 case POWER_SLEEP_STATE_SUSPEND: 1537 case POWER_SLEEP_STATE_HIBERNATE: 1538 apm_state = PMST_SUSPEND; 1539 break; 1540 default: 1541 error = EINVAL; 1542 goto out; 1543 } 1544 1545 apm_suspend(apm_state); 1546 break; 1547 1548 default: 1549 error = EINVAL; 1550 goto out; 1551 } 1552 1553out: 1554 return (error); 1555} 1556 1557static void 1558apm_pm_register(void *arg) 1559{ 1560 1561 if (!resource_disabled("apm", 0)) 1562 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL); 1563} 1564 1565SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0); 1566