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: releng/5.2/sys/i386/bios/apm.c 122352 2003-11-09 09:17:26Z tanimura $"); 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 */ 59 int apm_display(int newstate); 60 struct apm_softc apm_softc; 61 62 static void apm_resume(void); 63 static int apm_bioscall(void); 64 static int apm_check_function_supported(u_int version, u_int func); 65 66 static int apm_pm_func(u_long, void*, ...); 67 68 static u_long apm_version; 69 70 int 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 81 extern 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 87 static __inline void apm_enable_smm(struct apm_softc *); 88 static __inline void apm_disable_smm(struct apm_softc *); 89 int apm_necsmm_addr; 90 u_int32_t apm_necsmm_mask; 91 #endif 92 93 static 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)) 99 100 static struct callout_handle apm_timeout_ch = 101 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch); 102 103 static timeout_t apm_timeout; 104 static d_open_t apmopen; 105 static d_close_t apmclose; 106 static d_write_t apmwrite; 107 static d_ioctl_t apmioctl; 108 static d_poll_t apmpoll; 109 110 #define CDEV_MAJOR 39 111 static 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 }; 120 121 static int apm_suspend_delay = 1; 122 static int apm_standby_delay = 1; 123 static int apm_swab_batt_minutes = 0; 124 static int apm_debug = 0; 125 126 #define APM_DPRINT(args...) do { \ 127 if (apm_debug) { \ 128 printf(args); \ 129 } \ 130 } while (0) 131 132 SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, ""); 133 SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, ""); 134 SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, ""); 135 136 TUNABLE_INT("machdep.apm_swab_batt_minutes", &apm_swab_batt_minutes); 137 SYSCTL_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 141 static __inline void 142 apm_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 } 151 152 static __inline void 153 apm_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 */ 169 static int 170 apm_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). */ 203 static int 204 apm_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 */ 236 static int 237 apm_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) */ 253 static int 254 apm_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) */ 274 static int 275 apm_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 */ 287 static u_int 288 apm_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 */ 303 static int 304 apm_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 */ 333 int 334 apm_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 */ 362 static void 363 apm_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 */ 378 static void 379 apm_battery_low(void) 380 { 381 printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 382 } 383 384 /* APM hook manager */ 385 static struct apmhook * 386 apm_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 } 411 412 static void 413 apm_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; 425 deleteit: 426 if (prev != NULL) 427 prev->ah_next = p->ah_next; 428 else 429 *list = p->ah_next; 430 nosuchnode: 431 splx(s); 432 } 433 434 435 /* APM driver calls some functions automatically */ 436 static void 437 apm_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 */ 450 struct apmhook * 451 apm_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 */ 460 void 461 apm_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 } 468 469 static int apm_record_event(struct apm_softc *, u_int); 470 static void apm_processevent(void); 471 472 static u_int apm_op_inprog = 0; 473 474 static void 475 apm_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 } 503 504 static void 505 apm_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 } 524 525 static void 526 apm_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 } 536 537 static int 538 apm_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 */ 565 566 void 567 apm_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 } 595 596 static void 597 apm_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 */ 616 static int 617 apm_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 */ 652 static int 653 apm_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 */ 691 void 692 apm_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 */ 717 void 718 apm_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 */ 741 742 static void 743 apm_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 */ 765 static void 766 apm_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 */ 778 static void 779 apm_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 */ 791 static void 792 apm_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 */ 801 static void 802 apm_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 */ 815 816 static int 817 apm_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 */ 839 static void 840 apm_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 if (resource_disabled("apm", 0)) 850 return; 851 852 child = BUS_ADD_CHILD(parent, 0, "apm", 0); 853 if (child == NULL) 854 panic("apm_identify"); 855 } 856 857 /* 858 * probe for APM BIOS 859 */ 860 static int 861 apm_probe(device_t dev) 862 { 863 #define APM_KERNBASE KERNBASE 864 struct vm86frame vmf; 865 struct apm_softc *sc = &apm_softc; 866 int flags; 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 if (resource_int_value("apm", 0, "flags", &flags) != 0) 884 flags = 0; 885 886 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 887 bzero(&apm_softc, sizeof(apm_softc)); 888 vmf.vmf_ah = APM_BIOS; 889 vmf.vmf_al = APM_INSTCHECK; 890 vmf.vmf_bx = 0; 891 if (vm86_intcall(APM_INT, &vmf)) 892 return ENXIO; /* APM not found */ 893 if (vmf.vmf_bx != 0x504d) { 894 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); 895 return ENXIO; 896 } 897 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { 898 printf("apm: protected mode connections are not supported\n"); 899 return ENXIO; 900 } 901 902 apm_version = vmf.vmf_ax; 903 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); 904 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); 905 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); 906 907 vmf.vmf_ah = APM_BIOS; 908 vmf.vmf_al = APM_DISCONNECT; 909 vmf.vmf_bx = 0; 910 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ 911 912 #ifdef PC98 913 /* PC98 have bogos APM 32bit BIOS */ 914 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0) 915 return ENXIO; 916 rid = 0; 917 bus_set_resource(dev, SYS_RES_IOPORT, rid, 918 APM_NECSMM_PORT, APM_NECSMM_PORTSZ); 919 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 920 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 921 if (sc->sc_res == NULL) { 922 printf("apm: cannot open NEC smm device\n"); 923 return ENXIO; 924 } 925 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res); 926 927 vmf.vmf_ah = APM_BIOS; 928 vmf.vmf_al = APM_PROT32CONNECT; 929 vmf.vmf_bx = 0; 930 if (vm86_intcall(APM_INT, &vmf)) { 931 printf("apm: 32-bit connection error.\n"); 932 return (ENXIO); 933 } 934 935 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 936 sc->bios.seg.code32.limit = 0xffff; 937 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 938 sc->bios.seg.code16.limit = 0xffff; 939 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 940 sc->bios.seg.data.limit = 0xffff; 941 sc->bios.entry = vmf.vmf_ebx; 942 sc->connectmode = APM_PROT32CONNECT; 943 #else 944 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 945 vmf.vmf_ah = APM_BIOS; 946 vmf.vmf_al = APM_PROT32CONNECT; 947 vmf.vmf_bx = 0; 948 if (vm86_intcall(APM_INT, &vmf)) { 949 printf("apm: 32-bit connection error.\n"); 950 return (ENXIO); 951 } 952 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 953 sc->bios.seg.code32.limit = 0xffff; 954 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 955 sc->bios.seg.code16.limit = 0xffff; 956 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 957 sc->bios.seg.data.limit = 0xffff; 958 sc->bios.entry = vmf.vmf_ebx; 959 sc->connectmode = APM_PROT32CONNECT; 960 } else { 961 /* use 16-bit connection */ 962 vmf.vmf_ah = APM_BIOS; 963 vmf.vmf_al = APM_PROT16CONNECT; 964 vmf.vmf_bx = 0; 965 if (vm86_intcall(APM_INT, &vmf)) { 966 printf("apm: 16-bit connection error.\n"); 967 return (ENXIO); 968 } 969 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 970 sc->bios.seg.code16.limit = 0xffff; 971 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 972 sc->bios.seg.data.limit = 0xffff; 973 sc->bios.entry = vmf.vmf_bx; 974 sc->connectmode = APM_PROT16CONNECT; 975 } 976 #endif 977 return(0); 978 } 979 980 981 /* 982 * return 0 if the user will notice and handle the event, 983 * return 1 if the kernel driver should do so. 984 */ 985 static int 986 apm_record_event(struct apm_softc *sc, u_int event_type) 987 { 988 struct apm_event_info *evp; 989 990 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 991 return 1; /* no user waiting */ 992 if (sc->event_count == APM_NEVENTS) 993 return 1; /* overflow */ 994 if (sc->event_filter[event_type] == 0) 995 return 1; /* not registered */ 996 evp = &sc->event_list[sc->event_ptr]; 997 sc->event_count++; 998 sc->event_ptr++; 999 sc->event_ptr %= APM_NEVENTS; 1000 evp->type = event_type; 1001 evp->index = ++apm_evindex; 1002 selwakeuppri(&sc->sc_rsel, PZERO); 1003 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 1004 } 1005 1006 /* Power profile */ 1007 static void 1008 apm_power_profile(struct apm_softc *sc) 1009 { 1010 int state; 1011 struct apm_info info; 1012 static int apm_acline = 0; 1013 1014 if (apm_get_info(&info)) 1015 return; 1016 1017 if (apm_acline != info.ai_acline) { 1018 apm_acline = info.ai_acline; 1019 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY; 1020 power_profile_set_state(state); 1021 } 1022 } 1023 1024 /* Process APM event */ 1025 static void 1026 apm_processevent(void) 1027 { 1028 int apm_event; 1029 struct apm_softc *sc = &apm_softc; 1030 1031 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 1032 APM_DPRINT("Received APM Event: " #symbol "\n"); 1033 1034 do { 1035 apm_event = apm_getevent(); 1036 switch (apm_event) { 1037 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 1038 if (apm_op_inprog == 0) { 1039 apm_op_inprog++; 1040 if (apm_record_event(sc, apm_event)) { 1041 apm_suspend(PMST_STANDBY); 1042 } 1043 } 1044 break; 1045 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); 1046 if (apm_op_inprog == 0) { 1047 apm_op_inprog++; 1048 if (apm_record_event(sc, apm_event)) { 1049 apm_suspend(PMST_STANDBY); 1050 } 1051 } 1052 break; 1053 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 1054 apm_lastreq_notify(); 1055 if (apm_op_inprog == 0) { 1056 apm_op_inprog++; 1057 if (apm_record_event(sc, apm_event)) { 1058 apm_do_suspend(); 1059 } 1060 } 1061 return; /* XXX skip the rest */ 1062 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 1063 apm_lastreq_notify(); 1064 if (apm_op_inprog == 0) { 1065 apm_op_inprog++; 1066 if (apm_record_event(sc, apm_event)) { 1067 apm_do_suspend(); 1068 } 1069 } 1070 return; /* XXX skip the rest */ 1071 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 1072 apm_do_suspend(); 1073 break; 1074 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 1075 apm_record_event(sc, apm_event); 1076 apm_resume(); 1077 break; 1078 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 1079 apm_record_event(sc, apm_event); 1080 apm_resume(); 1081 break; 1082 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 1083 apm_record_event(sc, apm_event); 1084 break; 1085 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 1086 if (apm_record_event(sc, apm_event)) { 1087 apm_battery_low(); 1088 apm_suspend(PMST_SUSPEND); 1089 } 1090 break; 1091 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 1092 apm_record_event(sc, apm_event); 1093 apm_power_profile(sc); 1094 break; 1095 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 1096 apm_record_event(sc, apm_event); 1097 inittodr(0); /* adjust time to RTC */ 1098 break; 1099 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); 1100 apm_record_event(sc, apm_event); 1101 apm_power_profile(sc); 1102 break; 1103 case PMEV_NOEVENT: 1104 break; 1105 default: 1106 printf("Unknown Original APM Event 0x%x\n", apm_event); 1107 break; 1108 } 1109 } while (apm_event != PMEV_NOEVENT); 1110 #ifdef PC98 1111 apm_disable_smm(sc); 1112 #endif 1113 } 1114 1115 /* 1116 * Attach APM: 1117 * 1118 * Initialize APM driver 1119 */ 1120 1121 static int 1122 apm_attach(device_t dev) 1123 { 1124 struct apm_softc *sc = &apm_softc; 1125 int flags; 1126 int drv_version; 1127 #ifdef PC98 1128 int rid; 1129 #endif 1130 1131 if (resource_int_value("apm", 0, "flags", &flags) != 0) 1132 flags = 0; 1133 1134 if (flags & 0x20) 1135 statclock_disable = 1; 1136 1137 sc->initialized = 0; 1138 1139 /* Must be externally enabled */ 1140 sc->active = 0; 1141 1142 /* Always call HLT in idle loop */ 1143 sc->always_halt_cpu = 1; 1144 1145 getenv_int("debug.apm_debug", &apm_debug); 1146 1147 /* print bootstrap messages */ 1148 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version); 1149 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n", 1150 sc->bios.seg.code16.base, sc->bios.seg.data.base); 1151 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 1152 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 1153 is_enabled(!sc->disabled)); 1154 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n", 1155 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 1156 1157 #ifdef PC98 1158 rid = 0; 1159 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1160 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 1161 if (sc->sc_res == NULL) 1162 panic("%s: counldn't map I/O ports", device_get_name(dev)); 1163 sc->sc_iot = rman_get_bustag(sc->sc_res); 1164 sc->sc_ioh = rman_get_bushandle(sc->sc_res); 1165 1166 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110) 1167 apm_necsmm_addr = APM_NECSMM_PORT; 1168 else 1169 apm_necsmm_addr = 0; 1170 apm_necsmm_mask = ~APM_NECSMM_EN; 1171 #endif /* PC98 */ 1172 1173 /* 1174 * In one test, apm bios version was 1.02; an attempt to register 1175 * a 1.04 driver resulted in a 1.00 connection! Registering a 1176 * 1.02 driver resulted in a 1.02 connection. 1177 */ 1178 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 1179 for (; drv_version > 0x100; drv_version--) 1180 if (apm_driver_version(drv_version) == 0) 1181 break; 1182 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 1183 ((drv_version & 0x000f) >> 0); 1184 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 1185 ((apm_version & 0x0f00) >> 8); 1186 1187 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1188 1189 if (sc->intversion >= INTVERSION(1, 1)) 1190 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1191 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n", 1192 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 1193 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 1194 sc->majorversion, sc->minorversion); 1195 1196 1197 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1198 /* enable power management */ 1199 if (sc->disabled) { 1200 if (apm_enable_disable_pm(1)) { 1201 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n", 1202 (sc->bios.r.eax >> 8) & 0xff); 1203 } 1204 } 1205 1206 /* engage power managment (APM 1.1 or later) */ 1207 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1208 if (apm_engage_disengage_pm(1)) { 1209 APM_DPRINT("apm: *Warning* engage function failed err=[%x]", 1210 (sc->bios.r.eax >> 8) & 0xff); 1211 APM_DPRINT(" (Docked or using external power?).\n"); 1212 } 1213 } 1214 1215 /* Power the system off using APM */ 1216 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 1217 SHUTDOWN_PRI_LAST); 1218 1219 /* Register APM again to pass the correct argument of pm_func. */ 1220 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc); 1221 1222 sc->initialized = 1; 1223 sc->suspending = 0; 1224 1225 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm"); 1226 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl"); 1227 return 0; 1228 } 1229 1230 static int 1231 apmopen(dev_t dev, int flag, int fmt, struct thread *td) 1232 { 1233 struct apm_softc *sc = &apm_softc; 1234 int ctl = APMDEV(dev); 1235 1236 if (!sc->initialized) 1237 return (ENXIO); 1238 1239 switch (ctl) { 1240 case APMDEV_CTL: 1241 if (!(flag & FWRITE)) 1242 return EINVAL; 1243 if (sc->sc_flags & SCFLAG_OCTL) 1244 return EBUSY; 1245 sc->sc_flags |= SCFLAG_OCTL; 1246 bzero(sc->event_filter, sizeof sc->event_filter); 1247 break; 1248 case APMDEV_NORMAL: 1249 sc->sc_flags |= SCFLAG_ONORMAL; 1250 break; 1251 default: 1252 return ENXIO; 1253 break; 1254 } 1255 return 0; 1256 } 1257 1258 static int 1259 apmclose(dev_t dev, int flag, int fmt, struct thread *td) 1260 { 1261 struct apm_softc *sc = &apm_softc; 1262 int ctl = APMDEV(dev); 1263 1264 switch (ctl) { 1265 case APMDEV_CTL: 1266 apm_lastreq_rejected(); 1267 sc->sc_flags &= ~SCFLAG_OCTL; 1268 bzero(sc->event_filter, sizeof sc->event_filter); 1269 break; 1270 case APMDEV_NORMAL: 1271 sc->sc_flags &= ~SCFLAG_ONORMAL; 1272 break; 1273 } 1274 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1275 sc->event_count = 0; 1276 sc->event_ptr = 0; 1277 } 1278 return 0; 1279 } 1280 1281 static int 1282 apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1283 { 1284 struct apm_softc *sc = &apm_softc; 1285 struct apm_bios_arg *args; 1286 int error = 0; 1287 int ret; 1288 int newstate; 1289 1290 if (!sc->initialized) 1291 return (ENXIO); 1292 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd); 1293 switch (cmd) { 1294 case APMIO_SUSPEND: 1295 if (!(flag & FWRITE)) 1296 return (EPERM); 1297 if (sc->active) 1298 apm_suspend(PMST_SUSPEND); 1299 else 1300 error = EINVAL; 1301 break; 1302 1303 case APMIO_STANDBY: 1304 if (!(flag & FWRITE)) 1305 return (EPERM); 1306 if (sc->active) 1307 apm_suspend(PMST_STANDBY); 1308 else 1309 error = EINVAL; 1310 break; 1311 1312 case APMIO_GETINFO_OLD: 1313 { 1314 struct apm_info info; 1315 apm_info_old_t aiop; 1316 1317 if (apm_get_info(&info)) 1318 error = ENXIO; 1319 aiop = (apm_info_old_t)addr; 1320 aiop->ai_major = info.ai_major; 1321 aiop->ai_minor = info.ai_minor; 1322 aiop->ai_acline = info.ai_acline; 1323 aiop->ai_batt_stat = info.ai_batt_stat; 1324 aiop->ai_batt_life = info.ai_batt_life; 1325 aiop->ai_status = info.ai_status; 1326 } 1327 break; 1328 case APMIO_GETINFO: 1329 if (apm_get_info((apm_info_t)addr)) 1330 error = ENXIO; 1331 break; 1332 case APMIO_GETPWSTATUS: 1333 if (apm_get_pwstatus((apm_pwstatus_t)addr)) 1334 error = ENXIO; 1335 break; 1336 case APMIO_ENABLE: 1337 if (!(flag & FWRITE)) 1338 return (EPERM); 1339 apm_event_enable(); 1340 break; 1341 case APMIO_DISABLE: 1342 if (!(flag & FWRITE)) 1343 return (EPERM); 1344 apm_event_disable(); 1345 break; 1346 case APMIO_HALTCPU: 1347 if (!(flag & FWRITE)) 1348 return (EPERM); 1349 apm_halt_cpu(); 1350 break; 1351 case APMIO_NOTHALTCPU: 1352 if (!(flag & FWRITE)) 1353 return (EPERM); 1354 apm_not_halt_cpu(); 1355 break; 1356 case APMIO_DISPLAY: 1357 if (!(flag & FWRITE)) 1358 return (EPERM); 1359 newstate = *(int *)addr; 1360 if (apm_display(newstate)) 1361 error = ENXIO; 1362 break; 1363 case APMIO_BIOS: 1364 if (!(flag & FWRITE)) 1365 return (EPERM); 1366 /* XXX compatibility with the old interface */ 1367 args = (struct apm_bios_arg *)addr; 1368 sc->bios.r.eax = args->eax; 1369 sc->bios.r.ebx = args->ebx; 1370 sc->bios.r.ecx = args->ecx; 1371 sc->bios.r.edx = args->edx; 1372 sc->bios.r.esi = args->esi; 1373 sc->bios.r.edi = args->edi; 1374 if ((ret = apm_bioscall())) { 1375 /* 1376 * Return code 1 means bios call was unsuccessful. 1377 * Error code is stored in %ah. 1378 * Return code -1 means bios call was unsupported 1379 * in the APM BIOS version. 1380 */ 1381 if (ret == -1) { 1382 error = EINVAL; 1383 } 1384 } else { 1385 /* 1386 * Return code 0 means bios call was successful. 1387 * We need only %al and can discard %ah. 1388 */ 1389 sc->bios.r.eax &= 0xff; 1390 } 1391 args->eax = sc->bios.r.eax; 1392 args->ebx = sc->bios.r.ebx; 1393 args->ecx = sc->bios.r.ecx; 1394 args->edx = sc->bios.r.edx; 1395 args->esi = sc->bios.r.esi; 1396 args->edi = sc->bios.r.edi; 1397 break; 1398 default: 1399 error = EINVAL; 1400 break; 1401 } 1402 1403 /* for /dev/apmctl */ 1404 if (APMDEV(dev) == APMDEV_CTL) { 1405 struct apm_event_info *evp; 1406 int i; 1407 1408 error = 0; 1409 switch (cmd) { 1410 case APMIO_NEXTEVENT: 1411 if (!sc->event_count) { 1412 error = EAGAIN; 1413 } else { 1414 evp = (struct apm_event_info *)addr; 1415 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1416 i %= APM_NEVENTS; 1417 *evp = sc->event_list[i]; 1418 sc->event_count--; 1419 } 1420 break; 1421 case APMIO_REJECTLASTREQ: 1422 if (apm_lastreq_rejected()) { 1423 error = EINVAL; 1424 } 1425 break; 1426 default: 1427 error = EINVAL; 1428 break; 1429 } 1430 } 1431 1432 return error; 1433 } 1434 1435 static int 1436 apmwrite(dev_t dev, struct uio *uio, int ioflag) 1437 { 1438 struct apm_softc *sc = &apm_softc; 1439 u_int event_type; 1440 int error; 1441 u_char enabled; 1442 1443 if (APMDEV(dev) != APMDEV_CTL) 1444 return(ENODEV); 1445 if (uio->uio_resid != sizeof(u_int)) 1446 return(E2BIG); 1447 1448 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1449 return(error); 1450 1451 if (event_type < 0 || event_type >= APM_NPMEV) 1452 return(EINVAL); 1453 1454 if (sc->event_filter[event_type] == 0) { 1455 enabled = 1; 1456 } else { 1457 enabled = 0; 1458 } 1459 sc->event_filter[event_type] = enabled; 1460 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1461 1462 return uio->uio_resid; 1463 } 1464 1465 static int 1466 apmpoll(dev_t dev, int events, struct thread *td) 1467 { 1468 struct apm_softc *sc = &apm_softc; 1469 int revents = 0; 1470 1471 if (events & (POLLIN | POLLRDNORM)) { 1472 if (sc->event_count) { 1473 revents |= events & (POLLIN | POLLRDNORM); 1474 } else { 1475 selrecord(td, &sc->sc_rsel); 1476 } 1477 } 1478 1479 return (revents); 1480 } 1481 1482 static device_method_t apm_methods[] = { 1483 /* Device interface */ 1484 DEVMETHOD(device_identify, apm_identify), 1485 DEVMETHOD(device_probe, apm_probe), 1486 DEVMETHOD(device_attach, apm_attach), 1487 1488 { 0, 0 } 1489 }; 1490 1491 static driver_t apm_driver = { 1492 "apm", 1493 apm_methods, 1494 1, /* no softc (XXX) */ 1495 }; 1496 1497 static devclass_t apm_devclass; 1498 1499 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0); 1500 MODULE_VERSION(apm, 1); 1501 1502 static int 1503 apm_pm_func(u_long cmd, void *arg, ...) 1504 { 1505 int state, apm_state; 1506 int error; 1507 va_list ap; 1508 1509 error = 0; 1510 switch (cmd) { 1511 case POWER_CMD_SUSPEND: 1512 va_start(ap, arg); 1513 state = va_arg(ap, int); 1514 va_end(ap); 1515 1516 switch (state) { 1517 case POWER_SLEEP_STATE_STANDBY: 1518 apm_state = PMST_STANDBY; 1519 break; 1520 case POWER_SLEEP_STATE_SUSPEND: 1521 case POWER_SLEEP_STATE_HIBERNATE: 1522 apm_state = PMST_SUSPEND; 1523 break; 1524 default: 1525 error = EINVAL; 1526 goto out; 1527 } 1528 1529 apm_suspend(apm_state); 1530 break; 1531 1532 default: 1533 error = EINVAL; 1534 goto out; 1535 } 1536 1537 out: 1538 return (error); 1539 } 1540 1541 static void 1542 apm_pm_register(void *arg) 1543 { 1544 1545 if (!resource_disabled("apm", 0)) 1546 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL); 1547 } 1548 1549 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);
Cache object: 255c3944ae6e58996476ceef36776bf1
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