apm.c revision 116665
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 116665 2003-06-22 05:08:10Z mdodd $"); 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/poll.h> 30#include <sys/power.h> 31#include <sys/reboot.h> 32#include <sys/selinfo.h> 33#include <sys/signalvar.h> 34#include <sys/sysctl.h> 35#include <sys/syslog.h> 36#include <sys/time.h> 37#include <sys/uio.h> 38 39#include <machine/apm_bios.h> 40#include <machine/clock.h> 41#include <machine/endian.h> 42#include <machine/pc/bios.h> 43#include <machine/cpufunc.h> 44#include <machine/segments.h> 45#include <machine/stdarg.h> 46#include <machine/vm86.h> 47 48#include <machine/bus.h> 49#include <machine/resource.h> 50#include <sys/rman.h> 51 52#include <vm/vm.h> 53#include <vm/pmap.h> 54#include <vm/vm_param.h> 55 56#include <i386/bios/apm.h> 57 58/* Used by the apm_saver screen saver module */ 59int apm_display(int newstate); 60struct apm_softc apm_softc; 61 62static void apm_resume(void); 63static int apm_bioscall(void); 64static int apm_check_function_supported(u_int version, u_int func); 65 66static int apm_pm_func(u_long, void*, ...); 67 68static u_long apm_version; 69 70int apm_evindex; 71 72#define SCFLAG_ONORMAL 0x0000001 73#define SCFLAG_OCTL 0x0000002 74#define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL) 75 76#define APMDEV(dev) (minor(dev)&0x0f) 77#define APMDEV_NORMAL 0 78#define APMDEV_CTL 8 79 80#ifdef PC98 81extern int bios32_apm98(struct bios_regs *, u_int, u_short); 82 83/* PC98's SMM definition */ 84#define APM_NECSMM_PORT 0x6b8e 85#define APM_NECSMM_PORTSZ 1 86#define APM_NECSMM_EN 0x10 87static __inline void apm_enable_smm(struct apm_softc *); 88static __inline void apm_disable_smm(struct apm_softc *); 89int apm_necsmm_addr; 90u_int32_t apm_necsmm_mask; 91#endif 92 93static struct apmhook *hook[NAPM_HOOK]; /* XXX */ 94 95#define is_enabled(foo) ((foo) ? "enabled" : "disabled") 96 97/* Map version number to integer (keeps ordering of version numbers) */ 98#define INTVERSION(major, minor) ((major)*100 + (minor)) 99 100static struct callout_handle apm_timeout_ch = 101 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch); 102 103static timeout_t apm_timeout; 104static d_open_t apmopen; 105static d_close_t apmclose; 106static d_write_t apmwrite; 107static d_ioctl_t apmioctl; 108static d_poll_t apmpoll; 109 110#define CDEV_MAJOR 39 111static struct cdevsw apm_cdevsw = { 112 .d_open = apmopen, 113 .d_close = apmclose, 114 .d_write = apmwrite, 115 .d_ioctl = apmioctl, 116 .d_poll = apmpoll, 117 .d_name = "apm", 118 .d_maj = CDEV_MAJOR, 119}; 120 121static int apm_suspend_delay = 1; 122static int apm_standby_delay = 1; 123static int apm_swab_batt_minutes = 0; 124static int apm_debug = 0; 125 126#define APM_DPRINT(args...) do { \ 127 if (apm_debug) { \ 128 printf(args); \ 129 } \ 130} while (0) 131 132SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, ""); 133SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, ""); 134SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, ""); 135 136TUNABLE_INT("machdep.apm_swab_batt_minutes", &apm_swab_batt_minutes); 137SYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RW, 138 &apm_swab_batt_minutes, 0, "Byte swap battery time value."); 139 140#ifdef PC98 141static __inline void 142apm_enable_smm(sc) 143 struct apm_softc *sc; 144{ 145 bus_space_tag_t iot = sc->sc_iot; 146 bus_space_handle_t ioh = sc->sc_ioh; 147 if (apm_necsmm_addr != 0) 148 bus_space_write_1(iot, ioh, 0, 149 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask)); 150} 151 152static __inline void 153apm_disable_smm(sc) 154 struct apm_softc *sc; 155{ 156 bus_space_tag_t iot = sc->sc_iot; 157 bus_space_handle_t ioh = sc->sc_ioh; 158 if (apm_necsmm_addr != 0) 159 bus_space_write_1(iot, ioh, 0, 160 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask)); 161} 162#endif 163 164/* 165 * return 0 if the function successfull, 166 * return 1 if the function unsuccessfull, 167 * return -1 if the function unsupported. 168 */ 169static int 170apm_bioscall(void) 171{ 172 struct apm_softc *sc = &apm_softc; 173 int errno = 0; 174 u_int apm_func = sc->bios.r.eax & 0xff; 175 176 if (!apm_check_function_supported(sc->intversion, apm_func)) { 177 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n", 178 apm_func, sc->majorversion, sc->minorversion); 179 return (-1); 180 } 181 182 sc->bios_busy = 1; 183#ifdef PC98 184 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG); 185 if (bios32_apm98(&sc->bios.r, sc->bios.entry, 186 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0) 187 return 1; 188#else 189 if (sc->connectmode == APM_PROT32CONNECT) { 190 set_bios_selectors(&sc->bios.seg, 191 BIOSCODE_FLAG | BIOSDATA_FLAG); 192 errno = bios32(&sc->bios.r, 193 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL)); 194 } else { 195 errno = bios16(&sc->bios, NULL); 196 } 197#endif 198 sc->bios_busy = 0; 199 return (errno); 200} 201 202/* check whether APM function is supported (1) or not (0). */ 203static int 204apm_check_function_supported(u_int version, u_int func) 205{ 206 /* except driver version */ 207 if (func == APM_DRVVERSION) { 208 return (1); 209 } 210#ifdef PC98 211 if (func == APM_GETPWSTATUS) { 212 return (1); 213 } 214#endif 215 216 switch (version) { 217 case INTVERSION(1, 0): 218 if (func > APM_GETPMEVENT) { 219 return (0); /* not supported */ 220 } 221 break; 222 case INTVERSION(1, 1): 223 if (func > APM_ENGAGEDISENGAGEPM && 224 func < APM_OEMFUNC) { 225 return (0); /* not supported */ 226 } 227 break; 228 case INTVERSION(1, 2): 229 break; 230 } 231 232 return (1); /* supported */ 233} 234 235/* enable/disable power management */ 236static int 237apm_enable_disable_pm(int enable) 238{ 239 struct apm_softc *sc = &apm_softc; 240 241 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM; 242 243 if (sc->intversion >= INTVERSION(1, 1)) 244 sc->bios.r.ebx = PMDV_ALLDEV; 245 else 246 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */ 247 sc->bios.r.ecx = enable; 248 sc->bios.r.edx = 0; 249 return (apm_bioscall()); 250} 251 252/* register driver version (APM 1.1 or later) */ 253static int 254apm_driver_version(int version) 255{ 256 struct apm_softc *sc = &apm_softc; 257 258 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION; 259 sc->bios.r.ebx = 0x0; 260 sc->bios.r.ecx = version; 261 sc->bios.r.edx = 0; 262 263 if (apm_bioscall() == 0 && sc->bios.r.eax == version) 264 return (0); 265 266 /* Some old BIOSes don't return the connection version in %ax. */ 267 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION)) 268 return (0); 269 270 return (1); 271} 272 273/* engage/disengage power management (APM 1.1 or later) */ 274static int 275apm_engage_disengage_pm(int engage) 276{ 277 struct apm_softc *sc = &apm_softc; 278 279 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM; 280 sc->bios.r.ebx = PMDV_ALLDEV; 281 sc->bios.r.ecx = engage; 282 sc->bios.r.edx = 0; 283 return (apm_bioscall()); 284} 285 286/* get PM event */ 287static u_int 288apm_getevent(void) 289{ 290 struct apm_softc *sc = &apm_softc; 291 292 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT; 293 294 sc->bios.r.ebx = 0; 295 sc->bios.r.ecx = 0; 296 sc->bios.r.edx = 0; 297 if (apm_bioscall()) 298 return (PMEV_NOEVENT); 299 return (sc->bios.r.ebx & 0xffff); 300} 301 302/* suspend entire system */ 303static int 304apm_suspend_system(int state) 305{ 306 struct apm_softc *sc = &apm_softc; 307 308 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 309 sc->bios.r.ebx = PMDV_ALLDEV; 310 sc->bios.r.ecx = state; 311 sc->bios.r.edx = 0; 312 313#ifdef PC98 314 apm_disable_smm(sc); 315#endif 316 if (apm_bioscall()) { 317 printf("Entire system suspend failure: errcode = %d\n", 318 0xff & (sc->bios.r.eax >> 8)); 319 return 1; 320 } 321#ifdef PC98 322 apm_enable_smm(sc); 323#endif 324 return 0; 325} 326 327/* Display control */ 328/* 329 * Experimental implementation: My laptop machine can't handle this function 330 * If your laptop can control the display via APM, please inform me. 331 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 332 */ 333int 334apm_display(int newstate) 335{ 336 struct apm_softc *sc = &apm_softc; 337 338 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 339 sc->bios.r.ebx = PMDV_DISP0; 340 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 341 sc->bios.r.edx = 0; 342 if (apm_bioscall() == 0) { 343 return 0; 344 } 345 346 /* If failed, then try to blank all display devices instead. */ 347 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 348 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */ 349 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 350 sc->bios.r.edx = 0; 351 if (apm_bioscall() == 0) { 352 return 0; 353 } 354 printf("Display off failure: errcode = %d\n", 355 0xff & (sc->bios.r.eax >> 8)); 356 return 1; 357} 358 359/* 360 * Turn off the entire system. 361 */ 362static void 363apm_power_off(void *junk, int howto) 364{ 365 struct apm_softc *sc = &apm_softc; 366 367 /* Not halting powering off, or not active */ 368 if (!(howto & RB_POWEROFF) || !apm_softc.active) 369 return; 370 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 371 sc->bios.r.ebx = PMDV_ALLDEV; 372 sc->bios.r.ecx = PMST_OFF; 373 sc->bios.r.edx = 0; 374 (void) apm_bioscall(); 375} 376 377/* APM Battery low handler */ 378static void 379apm_battery_low(void) 380{ 381 printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 382} 383 384/* APM hook manager */ 385static struct apmhook * 386apm_add_hook(struct apmhook **list, struct apmhook *ah) 387{ 388 int s; 389 struct apmhook *p, *prev; 390 391 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name); 392 393 s = splhigh(); 394 if (ah == NULL) 395 panic("illegal apm_hook!"); 396 prev = NULL; 397 for (p = *list; p != NULL; prev = p, p = p->ah_next) 398 if (p->ah_order > ah->ah_order) 399 break; 400 401 if (prev == NULL) { 402 ah->ah_next = *list; 403 *list = ah; 404 } else { 405 ah->ah_next = prev->ah_next; 406 prev->ah_next = ah; 407 } 408 splx(s); 409 return ah; 410} 411 412static void 413apm_del_hook(struct apmhook **list, struct apmhook *ah) 414{ 415 int s; 416 struct apmhook *p, *prev; 417 418 s = splhigh(); 419 prev = NULL; 420 for (p = *list; p != NULL; prev = p, p = p->ah_next) 421 if (p == ah) 422 goto deleteit; 423 panic("Tried to delete unregistered apm_hook."); 424 goto nosuchnode; 425deleteit: 426 if (prev != NULL) 427 prev->ah_next = p->ah_next; 428 else 429 *list = p->ah_next; 430nosuchnode: 431 splx(s); 432} 433 434 435/* APM driver calls some functions automatically */ 436static void 437apm_execute_hook(struct apmhook *list) 438{ 439 struct apmhook *p; 440 441 for (p = list; p != NULL; p = p->ah_next) { 442 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name); 443 if ((*(p->ah_fun))(p->ah_arg)) 444 printf("Warning: APM hook \"%s\" failed", p->ah_name); 445 } 446} 447 448 449/* establish an apm hook */ 450struct apmhook * 451apm_hook_establish(int apmh, struct apmhook *ah) 452{ 453 if (apmh < 0 || apmh >= NAPM_HOOK) 454 return NULL; 455 456 return apm_add_hook(&hook[apmh], ah); 457} 458 459/* disestablish an apm hook */ 460void 461apm_hook_disestablish(int apmh, struct apmhook *ah) 462{ 463 if (apmh < 0 || apmh >= NAPM_HOOK) 464 return; 465 466 apm_del_hook(&hook[apmh], ah); 467} 468 469static int apm_record_event(struct apm_softc *, u_int); 470static void apm_processevent(void); 471 472static u_int apm_op_inprog = 0; 473 474static void 475apm_do_suspend(void) 476{ 477 struct apm_softc *sc = &apm_softc; 478 int error; 479 480 if (!sc) 481 return; 482 483 apm_op_inprog = 0; 484 sc->suspends = sc->suspend_countdown = 0; 485 486 if (sc->initialized) { 487 error = DEVICE_SUSPEND(root_bus); 488 if (error) { 489 DEVICE_RESUME(root_bus); 490 } else { 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 } 501 } 502} 503 504static void 505apm_do_standby(void) 506{ 507 struct apm_softc *sc = &apm_softc; 508 509 if (!sc) 510 return; 511 512 apm_op_inprog = 0; 513 sc->standbys = sc->standby_countdown = 0; 514 515 if (sc->initialized) { 516 /* 517 * As far as standby, we don't need to execute 518 * all of suspend hooks. 519 */ 520 if (apm_suspend_system(PMST_STANDBY) == 0) 521 apm_processevent(); 522 } 523} 524 525static void 526apm_lastreq_notify(void) 527{ 528 struct apm_softc *sc = &apm_softc; 529 530 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 531 sc->bios.r.ebx = PMDV_ALLDEV; 532 sc->bios.r.ecx = PMST_LASTREQNOTIFY; 533 sc->bios.r.edx = 0; 534 apm_bioscall(); 535} 536 537static int 538apm_lastreq_rejected(void) 539{ 540 struct apm_softc *sc = &apm_softc; 541 542 if (apm_op_inprog == 0) { 543 return 1; /* no operation in progress */ 544 } 545 546 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 547 sc->bios.r.ebx = PMDV_ALLDEV; 548 sc->bios.r.ecx = PMST_LASTREQREJECT; 549 sc->bios.r.edx = 0; 550 551 if (apm_bioscall()) { 552 APM_DPRINT("apm_lastreq_rejected: failed\n"); 553 return 1; 554 } 555 apm_op_inprog = 0; 556 return 0; 557} 558 559/* 560 * Public interface to the suspend/resume: 561 * 562 * Execute suspend and resume hook before and after sleep, respectively. 563 * 564 */ 565 566void 567apm_suspend(int state) 568{ 569 struct apm_softc *sc = &apm_softc; 570 571 if (!sc->initialized) 572 return; 573 574 switch (state) { 575 case PMST_SUSPEND: 576 if (sc->suspends) 577 return; 578 sc->suspends++; 579 sc->suspend_countdown = apm_suspend_delay; 580 break; 581 case PMST_STANDBY: 582 if (sc->standbys) 583 return; 584 sc->standbys++; 585 sc->standby_countdown = apm_standby_delay; 586 break; 587 default: 588 printf("apm_suspend: Unknown Suspend state 0x%x\n", state); 589 return; 590 } 591 592 apm_op_inprog++; 593 apm_lastreq_notify(); 594} 595 596static void 597apm_resume(void) 598{ 599 struct apm_softc *sc = &apm_softc; 600 601 if (!sc) 602 return; 603 604 if (sc->suspending == 0) 605 return; 606 607 sc->suspending = 0; 608 if (sc->initialized) { 609 apm_execute_hook(hook[APM_HOOK_RESUME]); 610 DEVICE_RESUME(root_bus); 611 } 612} 613 614 615/* get power status per battery */ 616static int 617apm_get_pwstatus(apm_pwstatus_t app) 618{ 619 struct apm_softc *sc = &apm_softc; 620 621 if (app->ap_device != PMDV_ALLDEV && 622 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL)) 623 return 1; 624 625 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 626 sc->bios.r.ebx = app->ap_device; 627 sc->bios.r.ecx = 0; 628 sc->bios.r.edx = 0xffff; /* default to unknown battery time */ 629 630 if (apm_bioscall()) 631 return 1; 632 633 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff; 634 app->ap_batt_stat = sc->bios.r.ebx & 0xff; 635 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff; 636 app->ap_batt_life = sc->bios.r.ecx & 0xff; 637 sc->bios.r.edx &= 0xffff; 638 if (apm_swab_batt_minutes) 639 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000; 640 if (sc->bios.r.edx == 0xffff) /* Time is unknown */ 641 app->ap_batt_time = -1; 642 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */ 643 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60; 644 else /* Time is in seconds */ 645 app->ap_batt_time = sc->bios.r.edx; 646 647 return 0; 648} 649 650 651/* get APM information */ 652static int 653apm_get_info(apm_info_t aip) 654{ 655 struct apm_softc *sc = &apm_softc; 656 struct apm_pwstatus aps; 657 658 bzero(&aps, sizeof(aps)); 659 aps.ap_device = PMDV_ALLDEV; 660 if (apm_get_pwstatus(&aps)) 661 return 1; 662 663 aip->ai_infoversion = 1; 664 aip->ai_acline = aps.ap_acline; 665 aip->ai_batt_stat = aps.ap_batt_stat; 666 aip->ai_batt_life = aps.ap_batt_life; 667 aip->ai_batt_time = aps.ap_batt_time; 668 aip->ai_major = (u_int)sc->majorversion; 669 aip->ai_minor = (u_int)sc->minorversion; 670 aip->ai_status = (u_int)sc->active; 671 672 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 673 sc->bios.r.ebx = 0; 674 sc->bios.r.ecx = 0; 675 sc->bios.r.edx = 0; 676 if (apm_bioscall()) { 677 aip->ai_batteries = -1; /* Unknown */ 678 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 679 } else { 680 aip->ai_batteries = sc->bios.r.ebx & 0xff; 681 aip->ai_capabilities = sc->bios.r.ecx & 0xf; 682 } 683 684 bzero(aip->ai_spare, sizeof aip->ai_spare); 685 686 return 0; 687} 688 689 690/* inform APM BIOS that CPU is idle */ 691void 692apm_cpu_idle(void) 693{ 694 struct apm_softc *sc = &apm_softc; 695 696 if (sc->active) { 697 698 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE; 699 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 700 (void) apm_bioscall(); 701 } 702 /* 703 * Some APM implementation halts CPU in BIOS, whenever 704 * "CPU-idle" function are invoked, but swtch() of 705 * FreeBSD halts CPU, therefore, CPU is halted twice 706 * in the sched loop. It makes the interrupt latency 707 * terribly long and be able to cause a serious problem 708 * in interrupt processing. We prevent it by removing 709 * "hlt" operation from swtch() and managed it under 710 * APM driver. 711 */ 712 if (!sc->active || sc->always_halt_cpu) 713 halt(); /* wait for interrupt */ 714} 715 716/* inform APM BIOS that CPU is busy */ 717void 718apm_cpu_busy(void) 719{ 720 struct apm_softc *sc = &apm_softc; 721 722 /* 723 * The APM specification says this is only necessary if your BIOS 724 * slows down the processor in the idle task, otherwise it's not 725 * necessary. 726 */ 727 if (sc->slow_idle_cpu && sc->active) { 728 729 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY; 730 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 731 apm_bioscall(); 732 } 733} 734 735 736/* 737 * APM timeout routine: 738 * 739 * This routine is automatically called by timer once per second. 740 */ 741 742static void 743apm_timeout(void *dummy) 744{ 745 struct apm_softc *sc = &apm_softc; 746 747 if (apm_op_inprog) 748 apm_lastreq_notify(); 749 750 if (sc->standbys && sc->standby_countdown-- <= 0) 751 apm_do_standby(); 752 753 if (sc->suspends && sc->suspend_countdown-- <= 0) 754 apm_do_suspend(); 755 756 if (!sc->bios_busy) 757 apm_processevent(); 758 759 if (sc->active == 1) 760 /* Run slightly more oftan than 1 Hz */ 761 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1); 762} 763 764/* enable APM BIOS */ 765static void 766apm_event_enable(void) 767{ 768 struct apm_softc *sc = &apm_softc; 769 770 APM_DPRINT("called apm_event_enable()\n"); 771 if (sc->initialized) { 772 sc->active = 1; 773 apm_timeout(sc); 774 } 775} 776 777/* disable APM BIOS */ 778static void 779apm_event_disable(void) 780{ 781 struct apm_softc *sc = &apm_softc; 782 783 APM_DPRINT("called apm_event_disable()\n"); 784 if (sc->initialized) { 785 untimeout(apm_timeout, NULL, apm_timeout_ch); 786 sc->active = 0; 787 } 788} 789 790/* halt CPU in scheduling loop */ 791static void 792apm_halt_cpu(void) 793{ 794 struct apm_softc *sc = &apm_softc; 795 796 if (sc->initialized) 797 sc->always_halt_cpu = 1; 798} 799 800/* don't halt CPU in scheduling loop */ 801static void 802apm_not_halt_cpu(void) 803{ 804 struct apm_softc *sc = &apm_softc; 805 806 if (sc->initialized) 807 sc->always_halt_cpu = 0; 808} 809 810/* device driver definitions */ 811 812/* 813 * Module event 814 */ 815 816static int 817apm_modevent(struct module *mod, int event, void *junk) 818{ 819 820 switch (event) { 821 case MOD_LOAD: 822 if (!cold) 823 return (EPERM); 824 break; 825 case MOD_UNLOAD: 826 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM) 827 return (EBUSY); 828 break; 829 default: 830 break; 831 } 832 833 return (0); 834} 835 836/* 837 * Create "connection point" 838 */ 839static void 840apm_identify(driver_t *driver, device_t parent) 841{ 842 device_t child; 843 844 if (!cold) { 845 printf("Don't load this driver from userland!!\n"); 846 return; 847 } 848 849 child = BUS_ADD_CHILD(parent, 0, "apm", 0); 850 if (child == NULL) 851 panic("apm_identify"); 852} 853 854/* 855 * probe for APM BIOS 856 */ 857static int 858apm_probe(device_t dev) 859{ 860#define APM_KERNBASE KERNBASE 861 struct vm86frame vmf; 862 struct apm_softc *sc = &apm_softc; 863 int disabled, flags; 864#ifdef PC98 865 int rid; 866#endif 867 868 device_set_desc(dev, "APM BIOS"); 869 870 if (resource_int_value("apm", 0, "disabled", &disabled) != 0) 871 disabled = 0; 872 if (disabled) 873 return ENXIO; 874 875 if (device_get_unit(dev) > 0) { 876 printf("apm: Only one APM driver supported.\n"); 877 return ENXIO; 878 } 879 880 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 881 power_pm_get_type() != POWER_PM_TYPE_APM) { 882 printf("apm: Other PM system enabled.\n"); 883 return ENXIO; 884 } 885 886 if (resource_int_value("apm", 0, "flags", &flags) != 0) 887 flags = 0; 888 889 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 890 bzero(&apm_softc, sizeof(apm_softc)); 891 vmf.vmf_ah = APM_BIOS; 892 vmf.vmf_al = APM_INSTCHECK; 893 vmf.vmf_bx = 0; 894 if (vm86_intcall(APM_INT, &vmf)) 895 return ENXIO; /* APM not found */ 896 if (vmf.vmf_bx != 0x504d) { 897 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); 898 return ENXIO; 899 } 900 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { 901 printf("apm: protected mode connections are not supported\n"); 902 return ENXIO; 903 } 904 905 apm_version = vmf.vmf_ax; 906 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); 907 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); 908 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); 909 910 vmf.vmf_ah = APM_BIOS; 911 vmf.vmf_al = APM_DISCONNECT; 912 vmf.vmf_bx = 0; 913 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ 914 915#ifdef PC98 916 /* PC98 have bogos APM 32bit BIOS */ 917 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0) 918 return ENXIO; 919 rid = 0; 920 bus_set_resource(dev, SYS_RES_IOPORT, rid, 921 APM_NECSMM_PORT, APM_NECSMM_PORTSZ); 922 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 923 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 924 if (sc->sc_res == NULL) { 925 printf("apm: cannot open NEC smm device\n"); 926 return ENXIO; 927 } 928 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res); 929 930 vmf.vmf_ah = APM_BIOS; 931 vmf.vmf_al = APM_PROT32CONNECT; 932 vmf.vmf_bx = 0; 933 if (vm86_intcall(APM_INT, &vmf)) { 934 printf("apm: 32-bit connection error.\n"); 935 return (ENXIO); 936 } 937 938 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 939 sc->bios.seg.code32.limit = 0xffff; 940 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 941 sc->bios.seg.code16.limit = 0xffff; 942 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 943 sc->bios.seg.data.limit = 0xffff; 944 sc->bios.entry = vmf.vmf_ebx; 945 sc->connectmode = APM_PROT32CONNECT; 946#else 947 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 948 vmf.vmf_ah = APM_BIOS; 949 vmf.vmf_al = APM_PROT32CONNECT; 950 vmf.vmf_bx = 0; 951 if (vm86_intcall(APM_INT, &vmf)) { 952 printf("apm: 32-bit connection error.\n"); 953 return (ENXIO); 954 } 955 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 956 sc->bios.seg.code32.limit = 0xffff; 957 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 958 sc->bios.seg.code16.limit = 0xffff; 959 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 960 sc->bios.seg.data.limit = 0xffff; 961 sc->bios.entry = vmf.vmf_ebx; 962 sc->connectmode = APM_PROT32CONNECT; 963 } else { 964 /* use 16-bit connection */ 965 vmf.vmf_ah = APM_BIOS; 966 vmf.vmf_al = APM_PROT16CONNECT; 967 vmf.vmf_bx = 0; 968 if (vm86_intcall(APM_INT, &vmf)) { 969 printf("apm: 16-bit connection error.\n"); 970 return (ENXIO); 971 } 972 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 973 sc->bios.seg.code16.limit = 0xffff; 974 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 975 sc->bios.seg.data.limit = 0xffff; 976 sc->bios.entry = vmf.vmf_bx; 977 sc->connectmode = APM_PROT16CONNECT; 978 } 979#endif 980 return(0); 981} 982 983 984/* 985 * return 0 if the user will notice and handle the event, 986 * return 1 if the kernel driver should do so. 987 */ 988static int 989apm_record_event(struct apm_softc *sc, u_int event_type) 990{ 991 struct apm_event_info *evp; 992 993 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 994 return 1; /* no user waiting */ 995 if (sc->event_count == APM_NEVENTS) 996 return 1; /* overflow */ 997 if (sc->event_filter[event_type] == 0) 998 return 1; /* not registered */ 999 evp = &sc->event_list[sc->event_ptr]; 1000 sc->event_count++; 1001 sc->event_ptr++; 1002 sc->event_ptr %= APM_NEVENTS; 1003 evp->type = event_type; 1004 evp->index = ++apm_evindex; 1005 selwakeup(&sc->sc_rsel); 1006 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 1007} 1008 1009/* Power profile */ 1010static void 1011apm_power_profile(struct apm_softc *sc) 1012{ 1013 int state; 1014 struct apm_info info; 1015 static int apm_acline = 0; 1016 1017 if (apm_get_info(&info)) 1018 return; 1019 1020 if (apm_acline != info.ai_acline) { 1021 apm_acline = info.ai_acline; 1022 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY; 1023 power_profile_set_state(state); 1024 } 1025} 1026 1027/* Process APM event */ 1028static void 1029apm_processevent(void) 1030{ 1031 int apm_event; 1032 struct apm_softc *sc = &apm_softc; 1033 1034#define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 1035 APM_DPRINT("Received APM Event: " #symbol "\n"); 1036 1037 do { 1038 apm_event = apm_getevent(); 1039 switch (apm_event) { 1040 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 1041 if (apm_op_inprog == 0) { 1042 apm_op_inprog++; 1043 if (apm_record_event(sc, apm_event)) { 1044 apm_suspend(PMST_STANDBY); 1045 } 1046 } 1047 break; 1048 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); 1049 if (apm_op_inprog == 0) { 1050 apm_op_inprog++; 1051 if (apm_record_event(sc, apm_event)) { 1052 apm_suspend(PMST_STANDBY); 1053 } 1054 } 1055 break; 1056 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 1057 apm_lastreq_notify(); 1058 if (apm_op_inprog == 0) { 1059 apm_op_inprog++; 1060 if (apm_record_event(sc, apm_event)) { 1061 apm_do_suspend(); 1062 } 1063 } 1064 return; /* XXX skip the rest */ 1065 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 1066 apm_lastreq_notify(); 1067 if (apm_op_inprog == 0) { 1068 apm_op_inprog++; 1069 if (apm_record_event(sc, apm_event)) { 1070 apm_do_suspend(); 1071 } 1072 } 1073 return; /* XXX skip the rest */ 1074 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 1075 apm_do_suspend(); 1076 break; 1077 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 1078 apm_record_event(sc, apm_event); 1079 apm_resume(); 1080 break; 1081 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 1082 apm_record_event(sc, apm_event); 1083 apm_resume(); 1084 break; 1085 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 1086 apm_record_event(sc, apm_event); 1087 break; 1088 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 1089 if (apm_record_event(sc, apm_event)) { 1090 apm_battery_low(); 1091 apm_suspend(PMST_SUSPEND); 1092 } 1093 break; 1094 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 1095 apm_record_event(sc, apm_event); 1096 apm_power_profile(sc); 1097 break; 1098 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 1099 apm_record_event(sc, apm_event); 1100 inittodr(0); /* adjust time to RTC */ 1101 break; 1102 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); 1103 apm_record_event(sc, apm_event); 1104 apm_power_profile(sc); 1105 break; 1106 case PMEV_NOEVENT: 1107 break; 1108 default: 1109 printf("Unknown Original APM Event 0x%x\n", apm_event); 1110 break; 1111 } 1112 } while (apm_event != PMEV_NOEVENT); 1113#ifdef PC98 1114 apm_disable_smm(sc); 1115#endif 1116} 1117 1118/* 1119 * Attach APM: 1120 * 1121 * Initialize APM driver 1122 */ 1123 1124static int 1125apm_attach(device_t dev) 1126{ 1127 struct apm_softc *sc = &apm_softc; 1128 int flags; 1129 int drv_version; 1130#ifdef PC98 1131 int rid; 1132#endif 1133 1134 if (resource_int_value("apm", 0, "flags", &flags) != 0) 1135 flags = 0; 1136 1137 if (flags & 0x20) 1138 statclock_disable = 1; 1139 1140 sc->initialized = 0; 1141 1142 /* Must be externally enabled */ 1143 sc->active = 0; 1144 1145 /* Always call HLT in idle loop */ 1146 sc->always_halt_cpu = 1; 1147 1148 getenv_int("debug.apm_debug", &apm_debug); 1149 1150 /* print bootstrap messages */ 1151 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version); 1152 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n", 1153 sc->bios.seg.code16.base, sc->bios.seg.data.base); 1154 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 1155 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 1156 is_enabled(!sc->disabled)); 1157 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n", 1158 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 1159 1160#ifdef PC98 1161 rid = 0; 1162 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1163 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 1164 if (sc->sc_res == NULL) 1165 panic("%s: counldn't map I/O ports", device_get_name(dev)); 1166 sc->sc_iot = rman_get_bustag(sc->sc_res); 1167 sc->sc_ioh = rman_get_bushandle(sc->sc_res); 1168 1169 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110) 1170 apm_necsmm_addr = APM_NECSMM_PORT; 1171 else 1172 apm_necsmm_addr = 0; 1173 apm_necsmm_mask = ~APM_NECSMM_EN; 1174#endif /* PC98 */ 1175 1176 /* 1177 * In one test, apm bios version was 1.02; an attempt to register 1178 * a 1.04 driver resulted in a 1.00 connection! Registering a 1179 * 1.02 driver resulted in a 1.02 connection. 1180 */ 1181 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 1182 for (; drv_version > 0x100; drv_version--) 1183 if (apm_driver_version(drv_version) == 0) 1184 break; 1185 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 1186 ((drv_version & 0x000f) >> 0); 1187 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 1188 ((apm_version & 0x0f00) >> 8); 1189 1190 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1191 1192 if (sc->intversion >= INTVERSION(1, 1)) 1193 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1194 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n", 1195 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 1196 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 1197 sc->majorversion, sc->minorversion); 1198 1199 1200 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1201 /* enable power management */ 1202 if (sc->disabled) { 1203 if (apm_enable_disable_pm(1)) { 1204 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n", 1205 (sc->bios.r.eax >> 8) & 0xff); 1206 } 1207 } 1208 1209 /* engage power managment (APM 1.1 or later) */ 1210 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1211 if (apm_engage_disengage_pm(1)) { 1212 APM_DPRINT("apm: *Warning* engage function failed err=[%x]", 1213 (sc->bios.r.eax >> 8) & 0xff); 1214 APM_DPRINT(" (Docked or using external power?).\n"); 1215 } 1216 } 1217 1218 /* Power the system off using APM */ 1219 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 1220 SHUTDOWN_PRI_LAST); 1221 1222 /* Register APM again to pass the correct argument of pm_func. */ 1223 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc); 1224 1225 sc->initialized = 1; 1226 sc->suspending = 0; 1227 1228 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm"); 1229 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl"); 1230 return 0; 1231} 1232 1233static int 1234apmopen(dev_t dev, int flag, int fmt, struct thread *td) 1235{ 1236 struct apm_softc *sc = &apm_softc; 1237 int ctl = APMDEV(dev); 1238 1239 if (!sc->initialized) 1240 return (ENXIO); 1241 1242 switch (ctl) { 1243 case APMDEV_CTL: 1244 if (!(flag & FWRITE)) 1245 return EINVAL; 1246 if (sc->sc_flags & SCFLAG_OCTL) 1247 return EBUSY; 1248 sc->sc_flags |= SCFLAG_OCTL; 1249 bzero(sc->event_filter, sizeof sc->event_filter); 1250 break; 1251 case APMDEV_NORMAL: 1252 sc->sc_flags |= SCFLAG_ONORMAL; 1253 break; 1254 default: 1255 return ENXIO; 1256 break; 1257 } 1258 return 0; 1259} 1260 1261static int 1262apmclose(dev_t dev, int flag, int fmt, struct thread *td) 1263{ 1264 struct apm_softc *sc = &apm_softc; 1265 int ctl = APMDEV(dev); 1266 1267 switch (ctl) { 1268 case APMDEV_CTL: 1269 apm_lastreq_rejected(); 1270 sc->sc_flags &= ~SCFLAG_OCTL; 1271 bzero(sc->event_filter, sizeof sc->event_filter); 1272 break; 1273 case APMDEV_NORMAL: 1274 sc->sc_flags &= ~SCFLAG_ONORMAL; 1275 break; 1276 } 1277 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1278 sc->event_count = 0; 1279 sc->event_ptr = 0; 1280 } 1281 return 0; 1282} 1283 1284static int 1285apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1286{ 1287 struct apm_softc *sc = &apm_softc; 1288 struct apm_bios_arg *args; 1289 int error = 0; 1290 int ret; 1291 int newstate; 1292 1293 if (!sc->initialized) 1294 return (ENXIO); 1295 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd); 1296 switch (cmd) { 1297 case APMIO_SUSPEND: 1298 if (!(flag & FWRITE)) 1299 return (EPERM); 1300 if (sc->active) 1301 apm_suspend(PMST_SUSPEND); 1302 else 1303 error = EINVAL; 1304 break; 1305 1306 case APMIO_STANDBY: 1307 if (!(flag & FWRITE)) 1308 return (EPERM); 1309 if (sc->active) 1310 apm_suspend(PMST_STANDBY); 1311 else 1312 error = EINVAL; 1313 break; 1314 1315 case APMIO_GETINFO_OLD: 1316 { 1317 struct apm_info info; 1318 apm_info_old_t aiop; 1319 1320 if (apm_get_info(&info)) 1321 error = ENXIO; 1322 aiop = (apm_info_old_t)addr; 1323 aiop->ai_major = info.ai_major; 1324 aiop->ai_minor = info.ai_minor; 1325 aiop->ai_acline = info.ai_acline; 1326 aiop->ai_batt_stat = info.ai_batt_stat; 1327 aiop->ai_batt_life = info.ai_batt_life; 1328 aiop->ai_status = info.ai_status; 1329 } 1330 break; 1331 case APMIO_GETINFO: 1332 if (apm_get_info((apm_info_t)addr)) 1333 error = ENXIO; 1334 break; 1335 case APMIO_GETPWSTATUS: 1336 if (apm_get_pwstatus((apm_pwstatus_t)addr)) 1337 error = ENXIO; 1338 break; 1339 case APMIO_ENABLE: 1340 if (!(flag & FWRITE)) 1341 return (EPERM); 1342 apm_event_enable(); 1343 break; 1344 case APMIO_DISABLE: 1345 if (!(flag & FWRITE)) 1346 return (EPERM); 1347 apm_event_disable(); 1348 break; 1349 case APMIO_HALTCPU: 1350 if (!(flag & FWRITE)) 1351 return (EPERM); 1352 apm_halt_cpu(); 1353 break; 1354 case APMIO_NOTHALTCPU: 1355 if (!(flag & FWRITE)) 1356 return (EPERM); 1357 apm_not_halt_cpu(); 1358 break; 1359 case APMIO_DISPLAY: 1360 if (!(flag & FWRITE)) 1361 return (EPERM); 1362 newstate = *(int *)addr; 1363 if (apm_display(newstate)) 1364 error = ENXIO; 1365 break; 1366 case APMIO_BIOS: 1367 if (!(flag & FWRITE)) 1368 return (EPERM); 1369 /* XXX compatibility with the old interface */ 1370 args = (struct apm_bios_arg *)addr; 1371 sc->bios.r.eax = args->eax; 1372 sc->bios.r.ebx = args->ebx; 1373 sc->bios.r.ecx = args->ecx; 1374 sc->bios.r.edx = args->edx; 1375 sc->bios.r.esi = args->esi; 1376 sc->bios.r.edi = args->edi; 1377 if ((ret = apm_bioscall())) { 1378 /* 1379 * Return code 1 means bios call was unsuccessful. 1380 * Error code is stored in %ah. 1381 * Return code -1 means bios call was unsupported 1382 * in the APM BIOS version. 1383 */ 1384 if (ret == -1) { 1385 error = EINVAL; 1386 } 1387 } else { 1388 /* 1389 * Return code 0 means bios call was successful. 1390 * We need only %al and can discard %ah. 1391 */ 1392 sc->bios.r.eax &= 0xff; 1393 } 1394 args->eax = sc->bios.r.eax; 1395 args->ebx = sc->bios.r.ebx; 1396 args->ecx = sc->bios.r.ecx; 1397 args->edx = sc->bios.r.edx; 1398 args->esi = sc->bios.r.esi; 1399 args->edi = sc->bios.r.edi; 1400 break; 1401 default: 1402 error = EINVAL; 1403 break; 1404 } 1405 1406 /* for /dev/apmctl */ 1407 if (APMDEV(dev) == APMDEV_CTL) { 1408 struct apm_event_info *evp; 1409 int i; 1410 1411 error = 0; 1412 switch (cmd) { 1413 case APMIO_NEXTEVENT: 1414 if (!sc->event_count) { 1415 error = EAGAIN; 1416 } else { 1417 evp = (struct apm_event_info *)addr; 1418 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1419 i %= APM_NEVENTS; 1420 *evp = sc->event_list[i]; 1421 sc->event_count--; 1422 } 1423 break; 1424 case APMIO_REJECTLASTREQ: 1425 if (apm_lastreq_rejected()) { 1426 error = EINVAL; 1427 } 1428 break; 1429 default: 1430 error = EINVAL; 1431 break; 1432 } 1433 } 1434 1435 return error; 1436} 1437 1438static int 1439apmwrite(dev_t dev, struct uio *uio, int ioflag) 1440{ 1441 struct apm_softc *sc = &apm_softc; 1442 u_int event_type; 1443 int error; 1444 u_char enabled; 1445 1446 if (APMDEV(dev) != APMDEV_CTL) 1447 return(ENODEV); 1448 if (uio->uio_resid != sizeof(u_int)) 1449 return(E2BIG); 1450 1451 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1452 return(error); 1453 1454 if (event_type < 0 || event_type >= APM_NPMEV) 1455 return(EINVAL); 1456 1457 if (sc->event_filter[event_type] == 0) { 1458 enabled = 1; 1459 } else { 1460 enabled = 0; 1461 } 1462 sc->event_filter[event_type] = enabled; 1463 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1464 1465 return uio->uio_resid; 1466} 1467 1468static int 1469apmpoll(dev_t dev, int events, struct thread *td) 1470{ 1471 struct apm_softc *sc = &apm_softc; 1472 int revents = 0; 1473 1474 if (events & (POLLIN | POLLRDNORM)) { 1475 if (sc->event_count) { 1476 revents |= events & (POLLIN | POLLRDNORM); 1477 } else { 1478 selrecord(td, &sc->sc_rsel); 1479 } 1480 } 1481 1482 return (revents); 1483} 1484 1485static device_method_t apm_methods[] = { 1486 /* Device interface */ 1487 DEVMETHOD(device_identify, apm_identify), 1488 DEVMETHOD(device_probe, apm_probe), 1489 DEVMETHOD(device_attach, apm_attach), 1490 1491 { 0, 0 } 1492}; 1493 1494static driver_t apm_driver = { 1495 "apm", 1496 apm_methods, 1497 1, /* no softc (XXX) */ 1498}; 1499 1500static devclass_t apm_devclass; 1501 1502DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0); 1503MODULE_VERSION(apm, 1); 1504 1505static int 1506apm_pm_func(u_long cmd, void *arg, ...) 1507{ 1508 int state, apm_state; 1509 int error; 1510 va_list ap; 1511 1512 error = 0; 1513 switch (cmd) { 1514 case POWER_CMD_SUSPEND: 1515 va_start(ap, arg); 1516 state = va_arg(ap, int); 1517 va_end(ap); 1518 1519 switch (state) { 1520 case POWER_SLEEP_STATE_STANDBY: 1521 apm_state = PMST_STANDBY; 1522 break; 1523 case POWER_SLEEP_STATE_SUSPEND: 1524 case POWER_SLEEP_STATE_HIBERNATE: 1525 apm_state = PMST_SUSPEND; 1526 break; 1527 default: 1528 error = EINVAL; 1529 goto out; 1530 } 1531 1532 apm_suspend(apm_state); 1533 break; 1534 1535 default: 1536 error = EINVAL; 1537 goto out; 1538 } 1539 1540out: 1541 return (error); 1542} 1543 1544static void 1545apm_pm_register(void *arg) 1546{ 1547 int disabled = 0; 1548 1549 resource_int_value("apm", 0, "disabled", &disabled); 1550 if (disabled == 0) 1551 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL); 1552} 1553 1554SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0); 1555