Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/i386/bios/apm.c
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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: src/sys/i386/bios/apm.c,v 1.142.2.2 2005/01/31 23:26:02 imp Exp $"); 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 */ 60 int apm_display(int newstate); 61 struct apm_softc apm_softc; 62 63 static void apm_resume(void); 64 static int apm_bioscall(void); 65 static int apm_check_function_supported(u_int version, u_int func); 66 67 static int apm_pm_func(u_long, void*, ...); 68 69 static u_long apm_version; 70 71 int 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 82 extern 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 88 static __inline void apm_enable_smm(struct apm_softc *); 89 static __inline void apm_disable_smm(struct apm_softc *); 90 int apm_necsmm_addr; 91 u_int32_t apm_necsmm_mask; 92 #endif 93 94 static 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)) 100 101 static struct callout_handle apm_timeout_ch = 102 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch); 103 104 static timeout_t apm_timeout; 105 static d_open_t apmopen; 106 static d_close_t apmclose; 107 static d_write_t apmwrite; 108 static d_ioctl_t apmioctl; 109 static d_poll_t apmpoll; 110 111 static 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 }; 121 122 static int apm_suspend_delay = 1; 123 static int apm_standby_delay = 1; 124 static int apm_swab_batt_minutes = 0; 125 static int apm_debug = 0; 126 127 #define APM_DPRINT(args...) do { \ 128 if (apm_debug) { \ 129 printf(args); \ 130 } \ 131 } while (0) 132 133 SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, ""); 134 SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, ""); 135 SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, ""); 136 137 TUNABLE_INT("machdep.apm_swab_batt_minutes", &apm_swab_batt_minutes); 138 SYSCTL_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 142 static __inline void 143 apm_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 } 152 153 static __inline void 154 apm_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 */ 170 static int 171 apm_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). */ 204 static int 205 apm_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 */ 237 static int 238 apm_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) */ 254 static int 255 apm_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) */ 275 static int 276 apm_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 */ 288 static u_int 289 apm_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 */ 304 static int 305 apm_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 */ 334 int 335 apm_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 */ 363 static void 364 apm_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 */ 379 static void 380 apm_battery_low(void) 381 { 382 printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 383 } 384 385 /* APM hook manager */ 386 static struct apmhook * 387 apm_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 } 412 413 static void 414 apm_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; 426 deleteit: 427 if (prev != NULL) 428 prev->ah_next = p->ah_next; 429 else 430 *list = p->ah_next; 431 nosuchnode: 432 splx(s); 433 } 434 435 436 /* APM driver calls some functions automatically */ 437 static void 438 apm_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 */ 451 struct apmhook * 452 apm_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 */ 461 void 462 apm_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 } 469 470 static int apm_record_event(struct apm_softc *, u_int); 471 static void apm_processevent(void); 472 473 static u_int apm_op_inprog = 0; 474 475 static void 476 apm_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 } 504 505 static void 506 apm_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 } 525 526 static void 527 apm_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 } 537 538 static int 539 apm_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 */ 566 567 void 568 apm_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 } 596 597 static void 598 apm_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 */ 617 static int 618 apm_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 */ 653 static int 654 apm_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 = 0xffffffff; /* 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 & 0xff; 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 */ 692 void 693 apm_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 */ 718 void 719 apm_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 */ 742 743 static void 744 apm_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 */ 766 static void 767 apm_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 */ 779 static void 780 apm_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 */ 792 static void 793 apm_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 */ 802 static void 803 apm_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 */ 816 817 static int 818 apm_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 */ 840 static void 841 apm_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 */ 861 static int 862 apm_probe(device_t dev) 863 { 864 #define APM_KERNBASE KERNBASE 865 struct vm86frame vmf; 866 struct apm_softc *sc = &apm_softc; 867 #ifdef PC98 868 int rid; 869 #endif 870 871 device_set_desc(dev, "APM BIOS"); 872 if (device_get_unit(dev) > 0) { 873 printf("apm: Only one APM driver supported.\n"); 874 return ENXIO; 875 } 876 877 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 878 power_pm_get_type() != POWER_PM_TYPE_APM) { 879 printf("apm: Other PM system enabled.\n"); 880 return ENXIO; 881 } 882 883 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 884 bzero(&apm_softc, sizeof(apm_softc)); 885 vmf.vmf_ah = APM_BIOS; 886 vmf.vmf_al = APM_INSTCHECK; 887 vmf.vmf_bx = 0; 888 if (vm86_intcall(APM_INT, &vmf)) 889 return ENXIO; /* APM not found */ 890 if (vmf.vmf_bx != 0x504d) { 891 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); 892 return ENXIO; 893 } 894 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { 895 printf("apm: protected mode connections are not supported\n"); 896 return ENXIO; 897 } 898 899 apm_version = vmf.vmf_ax; 900 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); 901 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); 902 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); 903 904 vmf.vmf_ah = APM_BIOS; 905 vmf.vmf_al = APM_DISCONNECT; 906 vmf.vmf_bx = 0; 907 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ 908 909 #ifdef PC98 910 /* PC98 have bogos APM 32bit BIOS */ 911 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0) 912 return ENXIO; 913 rid = 0; 914 bus_set_resource(dev, SYS_RES_IOPORT, rid, 915 APM_NECSMM_PORT, APM_NECSMM_PORTSZ); 916 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 917 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 918 if (sc->sc_res == NULL) { 919 printf("apm: cannot open NEC smm device\n"); 920 return ENXIO; 921 } 922 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res); 923 924 vmf.vmf_ah = APM_BIOS; 925 vmf.vmf_al = APM_PROT32CONNECT; 926 vmf.vmf_bx = 0; 927 if (vm86_intcall(APM_INT, &vmf)) { 928 printf("apm: 32-bit connection error.\n"); 929 return (ENXIO); 930 } 931 932 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 933 sc->bios.seg.code32.limit = 0xffff; 934 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 935 sc->bios.seg.code16.limit = 0xffff; 936 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 937 sc->bios.seg.data.limit = 0xffff; 938 sc->bios.entry = vmf.vmf_ebx; 939 sc->connectmode = APM_PROT32CONNECT; 940 #else 941 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 942 vmf.vmf_ah = APM_BIOS; 943 vmf.vmf_al = APM_PROT32CONNECT; 944 vmf.vmf_bx = 0; 945 if (vm86_intcall(APM_INT, &vmf)) { 946 printf("apm: 32-bit connection error.\n"); 947 return (ENXIO); 948 } 949 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 950 sc->bios.seg.code32.limit = 0xffff; 951 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 952 sc->bios.seg.code16.limit = 0xffff; 953 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 954 sc->bios.seg.data.limit = 0xffff; 955 sc->bios.entry = vmf.vmf_ebx; 956 sc->connectmode = APM_PROT32CONNECT; 957 } else { 958 /* use 16-bit connection */ 959 vmf.vmf_ah = APM_BIOS; 960 vmf.vmf_al = APM_PROT16CONNECT; 961 vmf.vmf_bx = 0; 962 if (vm86_intcall(APM_INT, &vmf)) { 963 printf("apm: 16-bit connection error.\n"); 964 return (ENXIO); 965 } 966 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 967 sc->bios.seg.code16.limit = 0xffff; 968 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 969 sc->bios.seg.data.limit = 0xffff; 970 sc->bios.entry = vmf.vmf_bx; 971 sc->connectmode = APM_PROT16CONNECT; 972 } 973 #endif 974 return(0); 975 } 976 977 978 /* 979 * return 0 if the user will notice and handle the event, 980 * return 1 if the kernel driver should do so. 981 */ 982 static int 983 apm_record_event(struct apm_softc *sc, u_int event_type) 984 { 985 struct apm_event_info *evp; 986 987 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 988 return 1; /* no user waiting */ 989 if (sc->event_count == APM_NEVENTS) 990 return 1; /* overflow */ 991 if (sc->event_filter[event_type] == 0) 992 return 1; /* not registered */ 993 evp = &sc->event_list[sc->event_ptr]; 994 sc->event_count++; 995 sc->event_ptr++; 996 sc->event_ptr %= APM_NEVENTS; 997 evp->type = event_type; 998 evp->index = ++apm_evindex; 999 selwakeuppri(&sc->sc_rsel, PZERO); 1000 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 1001 } 1002 1003 /* Power profile */ 1004 static void 1005 apm_power_profile(struct apm_softc *sc) 1006 { 1007 int state; 1008 struct apm_info info; 1009 static int apm_acline = 0; 1010 1011 if (apm_get_info(&info)) 1012 return; 1013 1014 if (apm_acline != info.ai_acline) { 1015 apm_acline = info.ai_acline; 1016 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY; 1017 power_profile_set_state(state); 1018 } 1019 } 1020 1021 /* Process APM event */ 1022 static void 1023 apm_processevent(void) 1024 { 1025 int apm_event; 1026 struct apm_softc *sc = &apm_softc; 1027 1028 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 1029 APM_DPRINT("Received APM Event: " #symbol "\n"); 1030 1031 do { 1032 apm_event = apm_getevent(); 1033 switch (apm_event) { 1034 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 1035 if (apm_op_inprog == 0) { 1036 apm_op_inprog++; 1037 if (apm_record_event(sc, apm_event)) { 1038 apm_suspend(PMST_STANDBY); 1039 } 1040 } 1041 break; 1042 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); 1043 if (apm_op_inprog == 0) { 1044 apm_op_inprog++; 1045 if (apm_record_event(sc, apm_event)) { 1046 apm_suspend(PMST_STANDBY); 1047 } 1048 } 1049 break; 1050 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 1051 apm_lastreq_notify(); 1052 if (apm_op_inprog == 0) { 1053 apm_op_inprog++; 1054 if (apm_record_event(sc, apm_event)) { 1055 apm_do_suspend(); 1056 } 1057 } 1058 return; /* XXX skip the rest */ 1059 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 1060 apm_lastreq_notify(); 1061 if (apm_op_inprog == 0) { 1062 apm_op_inprog++; 1063 if (apm_record_event(sc, apm_event)) { 1064 apm_do_suspend(); 1065 } 1066 } 1067 return; /* XXX skip the rest */ 1068 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 1069 apm_do_suspend(); 1070 break; 1071 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 1072 apm_record_event(sc, apm_event); 1073 apm_resume(); 1074 break; 1075 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 1076 apm_record_event(sc, apm_event); 1077 apm_resume(); 1078 break; 1079 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 1080 apm_record_event(sc, apm_event); 1081 break; 1082 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 1083 if (apm_record_event(sc, apm_event)) { 1084 apm_battery_low(); 1085 apm_suspend(PMST_SUSPEND); 1086 } 1087 break; 1088 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 1089 apm_record_event(sc, apm_event); 1090 apm_power_profile(sc); 1091 break; 1092 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 1093 apm_record_event(sc, apm_event); 1094 inittodr(0); /* adjust time to RTC */ 1095 break; 1096 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); 1097 apm_record_event(sc, apm_event); 1098 apm_power_profile(sc); 1099 break; 1100 case PMEV_NOEVENT: 1101 break; 1102 default: 1103 printf("Unknown Original APM Event 0x%x\n", apm_event); 1104 break; 1105 } 1106 } while (apm_event != PMEV_NOEVENT); 1107 #ifdef PC98 1108 apm_disable_smm(sc); 1109 #endif 1110 } 1111 1112 /* 1113 * Attach APM: 1114 * 1115 * Initialize APM driver 1116 */ 1117 1118 static int 1119 apm_attach(device_t dev) 1120 { 1121 struct apm_softc *sc = &apm_softc; 1122 int drv_version; 1123 #ifdef PC98 1124 int rid; 1125 #endif 1126 1127 if (device_get_flags(dev) & 0x20) 1128 statclock_disable = 1; 1129 1130 sc->initialized = 0; 1131 1132 /* Must be externally enabled */ 1133 sc->active = 0; 1134 1135 /* Always call HLT in idle loop */ 1136 sc->always_halt_cpu = 1; 1137 1138 getenv_int("debug.apm_debug", &apm_debug); 1139 1140 /* print bootstrap messages */ 1141 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version); 1142 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n", 1143 sc->bios.seg.code16.base, sc->bios.seg.data.base); 1144 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 1145 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 1146 is_enabled(!sc->disabled)); 1147 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n", 1148 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 1149 1150 #ifdef PC98 1151 rid = 0; 1152 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1153 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 1154 if (sc->sc_res == NULL) 1155 panic("%s: counldn't map I/O ports", device_get_name(dev)); 1156 sc->sc_iot = rman_get_bustag(sc->sc_res); 1157 sc->sc_ioh = rman_get_bushandle(sc->sc_res); 1158 1159 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110) 1160 apm_necsmm_addr = APM_NECSMM_PORT; 1161 else 1162 apm_necsmm_addr = 0; 1163 apm_necsmm_mask = ~APM_NECSMM_EN; 1164 #endif /* PC98 */ 1165 1166 /* 1167 * In one test, apm bios version was 1.02; an attempt to register 1168 * a 1.04 driver resulted in a 1.00 connection! Registering a 1169 * 1.02 driver resulted in a 1.02 connection. 1170 */ 1171 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 1172 for (; drv_version > 0x100; drv_version--) 1173 if (apm_driver_version(drv_version) == 0) 1174 break; 1175 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 1176 ((drv_version & 0x000f) >> 0); 1177 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 1178 ((apm_version & 0x0f00) >> 8); 1179 1180 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1181 1182 if (sc->intversion >= INTVERSION(1, 1)) 1183 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1184 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n", 1185 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 1186 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 1187 sc->majorversion, sc->minorversion); 1188 1189 1190 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1191 /* enable power management */ 1192 if (sc->disabled) { 1193 if (apm_enable_disable_pm(1)) { 1194 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n", 1195 (sc->bios.r.eax >> 8) & 0xff); 1196 } 1197 } 1198 1199 /* engage power managment (APM 1.1 or later) */ 1200 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1201 if (apm_engage_disengage_pm(1)) { 1202 APM_DPRINT("apm: *Warning* engage function failed err=[%x]", 1203 (sc->bios.r.eax >> 8) & 0xff); 1204 APM_DPRINT(" (Docked or using external power?).\n"); 1205 } 1206 } 1207 1208 /* Power the system off using APM */ 1209 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 1210 SHUTDOWN_PRI_LAST); 1211 1212 /* Register APM again to pass the correct argument of pm_func. */ 1213 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc); 1214 1215 sc->initialized = 1; 1216 sc->suspending = 0; 1217 1218 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm"); 1219 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl"); 1220 return 0; 1221 } 1222 1223 static int 1224 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td) 1225 { 1226 struct apm_softc *sc = &apm_softc; 1227 int ctl = APMDEV(dev); 1228 1229 if (!sc->initialized) 1230 return (ENXIO); 1231 1232 switch (ctl) { 1233 case APMDEV_CTL: 1234 if (!(flag & FWRITE)) 1235 return EINVAL; 1236 if (sc->sc_flags & SCFLAG_OCTL) 1237 return EBUSY; 1238 sc->sc_flags |= SCFLAG_OCTL; 1239 bzero(sc->event_filter, sizeof sc->event_filter); 1240 break; 1241 case APMDEV_NORMAL: 1242 sc->sc_flags |= SCFLAG_ONORMAL; 1243 break; 1244 default: 1245 return ENXIO; 1246 break; 1247 } 1248 return 0; 1249 } 1250 1251 static int 1252 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td) 1253 { 1254 struct apm_softc *sc = &apm_softc; 1255 int ctl = APMDEV(dev); 1256 1257 switch (ctl) { 1258 case APMDEV_CTL: 1259 apm_lastreq_rejected(); 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 } 1267 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1268 sc->event_count = 0; 1269 sc->event_ptr = 0; 1270 } 1271 return 0; 1272 } 1273 1274 static int 1275 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1276 { 1277 struct apm_softc *sc = &apm_softc; 1278 struct apm_bios_arg *args; 1279 int error = 0; 1280 int ret; 1281 int newstate; 1282 1283 if (!sc->initialized) 1284 return (ENXIO); 1285 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd); 1286 switch (cmd) { 1287 case APMIO_SUSPEND: 1288 if (!(flag & FWRITE)) 1289 return (EPERM); 1290 if (sc->active) 1291 apm_suspend(PMST_SUSPEND); 1292 else 1293 error = EINVAL; 1294 break; 1295 1296 case APMIO_STANDBY: 1297 if (!(flag & FWRITE)) 1298 return (EPERM); 1299 if (sc->active) 1300 apm_suspend(PMST_STANDBY); 1301 else 1302 error = EINVAL; 1303 break; 1304 1305 case APMIO_GETINFO_OLD: 1306 { 1307 struct apm_info info; 1308 apm_info_old_t aiop; 1309 1310 if (apm_get_info(&info)) 1311 error = ENXIO; 1312 aiop = (apm_info_old_t)addr; 1313 aiop->ai_major = info.ai_major; 1314 aiop->ai_minor = info.ai_minor; 1315 aiop->ai_acline = info.ai_acline; 1316 aiop->ai_batt_stat = info.ai_batt_stat; 1317 aiop->ai_batt_life = info.ai_batt_life; 1318 aiop->ai_status = info.ai_status; 1319 } 1320 break; 1321 case APMIO_GETINFO: 1322 if (apm_get_info((apm_info_t)addr)) 1323 error = ENXIO; 1324 break; 1325 case APMIO_GETPWSTATUS: 1326 if (apm_get_pwstatus((apm_pwstatus_t)addr)) 1327 error = ENXIO; 1328 break; 1329 case APMIO_ENABLE: 1330 if (!(flag & FWRITE)) 1331 return (EPERM); 1332 apm_event_enable(); 1333 break; 1334 case APMIO_DISABLE: 1335 if (!(flag & FWRITE)) 1336 return (EPERM); 1337 apm_event_disable(); 1338 break; 1339 case APMIO_HALTCPU: 1340 if (!(flag & FWRITE)) 1341 return (EPERM); 1342 apm_halt_cpu(); 1343 break; 1344 case APMIO_NOTHALTCPU: 1345 if (!(flag & FWRITE)) 1346 return (EPERM); 1347 apm_not_halt_cpu(); 1348 break; 1349 case APMIO_DISPLAY: 1350 if (!(flag & FWRITE)) 1351 return (EPERM); 1352 newstate = *(int *)addr; 1353 if (apm_display(newstate)) 1354 error = ENXIO; 1355 break; 1356 case APMIO_BIOS: 1357 if (!(flag & FWRITE)) 1358 return (EPERM); 1359 /* XXX compatibility with the old interface */ 1360 args = (struct apm_bios_arg *)addr; 1361 sc->bios.r.eax = args->eax; 1362 sc->bios.r.ebx = args->ebx; 1363 sc->bios.r.ecx = args->ecx; 1364 sc->bios.r.edx = args->edx; 1365 sc->bios.r.esi = args->esi; 1366 sc->bios.r.edi = args->edi; 1367 if ((ret = apm_bioscall())) { 1368 /* 1369 * Return code 1 means bios call was unsuccessful. 1370 * Error code is stored in %ah. 1371 * Return code -1 means bios call was unsupported 1372 * in the APM BIOS version. 1373 */ 1374 if (ret == -1) { 1375 error = EINVAL; 1376 } 1377 } else { 1378 /* 1379 * Return code 0 means bios call was successful. 1380 * We need only %al and can discard %ah. 1381 */ 1382 sc->bios.r.eax &= 0xff; 1383 } 1384 args->eax = sc->bios.r.eax; 1385 args->ebx = sc->bios.r.ebx; 1386 args->ecx = sc->bios.r.ecx; 1387 args->edx = sc->bios.r.edx; 1388 args->esi = sc->bios.r.esi; 1389 args->edi = sc->bios.r.edi; 1390 break; 1391 default: 1392 error = EINVAL; 1393 break; 1394 } 1395 1396 /* for /dev/apmctl */ 1397 if (APMDEV(dev) == APMDEV_CTL) { 1398 struct apm_event_info *evp; 1399 int i; 1400 1401 error = 0; 1402 switch (cmd) { 1403 case APMIO_NEXTEVENT: 1404 if (!sc->event_count) { 1405 error = EAGAIN; 1406 } else { 1407 evp = (struct apm_event_info *)addr; 1408 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1409 i %= APM_NEVENTS; 1410 *evp = sc->event_list[i]; 1411 sc->event_count--; 1412 } 1413 break; 1414 case APMIO_REJECTLASTREQ: 1415 if (apm_lastreq_rejected()) { 1416 error = EINVAL; 1417 } 1418 break; 1419 default: 1420 error = EINVAL; 1421 break; 1422 } 1423 } 1424 1425 return error; 1426 } 1427 1428 static int 1429 apmwrite(struct cdev *dev, struct uio *uio, int ioflag) 1430 { 1431 struct apm_softc *sc = &apm_softc; 1432 u_int event_type; 1433 int error; 1434 u_char enabled; 1435 1436 if (APMDEV(dev) != APMDEV_CTL) 1437 return(ENODEV); 1438 if (uio->uio_resid != sizeof(u_int)) 1439 return(E2BIG); 1440 1441 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1442 return(error); 1443 1444 if (event_type < 0 || event_type >= APM_NPMEV) 1445 return(EINVAL); 1446 1447 if (sc->event_filter[event_type] == 0) { 1448 enabled = 1; 1449 } else { 1450 enabled = 0; 1451 } 1452 sc->event_filter[event_type] = enabled; 1453 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1454 1455 return uio->uio_resid; 1456 } 1457 1458 static int 1459 apmpoll(struct cdev *dev, int events, struct thread *td) 1460 { 1461 struct apm_softc *sc = &apm_softc; 1462 int revents = 0; 1463 1464 if (events & (POLLIN | POLLRDNORM)) { 1465 if (sc->event_count) { 1466 revents |= events & (POLLIN | POLLRDNORM); 1467 } else { 1468 selrecord(td, &sc->sc_rsel); 1469 } 1470 } 1471 1472 return (revents); 1473 } 1474 1475 static device_method_t apm_methods[] = { 1476 /* Device interface */ 1477 DEVMETHOD(device_identify, apm_identify), 1478 DEVMETHOD(device_probe, apm_probe), 1479 DEVMETHOD(device_attach, apm_attach), 1480 1481 { 0, 0 } 1482 }; 1483 1484 static driver_t apm_driver = { 1485 "apm", 1486 apm_methods, 1487 1, /* no softc (XXX) */ 1488 }; 1489 1490 static devclass_t apm_devclass; 1491 1492 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0); 1493 MODULE_VERSION(apm, 1); 1494 1495 static int 1496 apm_pm_func(u_long cmd, void *arg, ...) 1497 { 1498 int state, apm_state; 1499 int error; 1500 va_list ap; 1501 1502 error = 0; 1503 switch (cmd) { 1504 case POWER_CMD_SUSPEND: 1505 va_start(ap, arg); 1506 state = va_arg(ap, int); 1507 va_end(ap); 1508 1509 switch (state) { 1510 case POWER_SLEEP_STATE_STANDBY: 1511 apm_state = PMST_STANDBY; 1512 break; 1513 case POWER_SLEEP_STATE_SUSPEND: 1514 case POWER_SLEEP_STATE_HIBERNATE: 1515 apm_state = PMST_SUSPEND; 1516 break; 1517 default: 1518 error = EINVAL; 1519 goto out; 1520 } 1521 1522 apm_suspend(apm_state); 1523 break; 1524 1525 default: 1526 error = EINVAL; 1527 goto out; 1528 } 1529 1530 out: 1531 return (error); 1532 } 1533 1534 static void 1535 apm_pm_register(void *arg) 1536 { 1537 1538 if (!resource_disabled("apm", 0)) 1539 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL); 1540 } 1541 1542 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);
Cache object: ac25af0a2086afde151d749b89db1477
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