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("$FreeBSD$"); 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 == NULL || sc->initialized == 0) 482 return; 483 484 apm_op_inprog = 0; 485 sc->suspends = sc->suspend_countdown = 0; 486 487 /* 488 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since 489 * non-MPSAFE drivers need this. 490 */ 491 mtx_lock(&Giant); 492 error = DEVICE_SUSPEND(root_bus); 493 if (error) { 494 mtx_unlock(&Giant); 495 return; 496 } 497 498 apm_execute_hook(hook[APM_HOOK_SUSPEND]); 499 if (apm_suspend_system(PMST_SUSPEND) == 0) { 500 sc->suspending = 1; 501 apm_processevent(); 502 } else { 503 /* Failure, 'resume' the system again */ 504 apm_execute_hook(hook[APM_HOOK_RESUME]); 505 DEVICE_RESUME(root_bus); 506 } 507 mtx_unlock(&Giant); 508 return; 509 } 510 511 static void 512 apm_do_standby(void) 513 { 514 struct apm_softc *sc = &apm_softc; 515 516 if (sc == NULL || sc->initialized == 0) 517 return; 518 519 apm_op_inprog = 0; 520 sc->standbys = sc->standby_countdown = 0; 521 522 /* 523 * As far as standby, we don't need to execute 524 * all of suspend hooks. 525 */ 526 if (apm_suspend_system(PMST_STANDBY) == 0) 527 apm_processevent(); 528 return; 529 } 530 531 static void 532 apm_lastreq_notify(void) 533 { 534 struct apm_softc *sc = &apm_softc; 535 536 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 537 sc->bios.r.ebx = PMDV_ALLDEV; 538 sc->bios.r.ecx = PMST_LASTREQNOTIFY; 539 sc->bios.r.edx = 0; 540 apm_bioscall(); 541 } 542 543 static int 544 apm_lastreq_rejected(void) 545 { 546 struct apm_softc *sc = &apm_softc; 547 548 if (apm_op_inprog == 0) { 549 return 1; /* no operation in progress */ 550 } 551 552 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 553 sc->bios.r.ebx = PMDV_ALLDEV; 554 sc->bios.r.ecx = PMST_LASTREQREJECT; 555 sc->bios.r.edx = 0; 556 557 if (apm_bioscall()) { 558 APM_DPRINT("apm_lastreq_rejected: failed\n"); 559 return 1; 560 } 561 apm_op_inprog = 0; 562 return 0; 563 } 564 565 /* 566 * Public interface to the suspend/resume: 567 * 568 * Execute suspend and resume hook before and after sleep, respectively. 569 * 570 */ 571 572 void 573 apm_suspend(int state) 574 { 575 struct apm_softc *sc = &apm_softc; 576 577 if (sc == NULL || sc->initialized == 0) 578 return; 579 580 switch (state) { 581 case PMST_SUSPEND: 582 if (sc->suspends) 583 return; 584 sc->suspends++; 585 sc->suspend_countdown = apm_suspend_delay; 586 break; 587 case PMST_STANDBY: 588 if (sc->standbys) 589 return; 590 sc->standbys++; 591 sc->standby_countdown = apm_standby_delay; 592 break; 593 default: 594 printf("apm_suspend: Unknown Suspend state 0x%x\n", state); 595 return; 596 } 597 598 apm_op_inprog++; 599 apm_lastreq_notify(); 600 } 601 602 static void 603 apm_resume(void) 604 { 605 struct apm_softc *sc = &apm_softc; 606 607 if (sc == NULL || sc->initialized == 0 || sc->suspending == 0) 608 return; 609 610 sc->suspending = 0; 611 apm_execute_hook(hook[APM_HOOK_RESUME]); 612 mtx_lock(&Giant); 613 DEVICE_RESUME(root_bus); 614 mtx_unlock(&Giant); 615 return; 616 } 617 618 619 /* get power status per battery */ 620 static int 621 apm_get_pwstatus(apm_pwstatus_t app) 622 { 623 struct apm_softc *sc = &apm_softc; 624 625 if (app->ap_device != PMDV_ALLDEV && 626 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL)) 627 return 1; 628 629 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 630 sc->bios.r.ebx = app->ap_device; 631 sc->bios.r.ecx = 0; 632 sc->bios.r.edx = 0xffff; /* default to unknown battery time */ 633 634 if (apm_bioscall()) 635 return 1; 636 637 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff; 638 app->ap_batt_stat = sc->bios.r.ebx & 0xff; 639 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff; 640 app->ap_batt_life = sc->bios.r.ecx & 0xff; 641 sc->bios.r.edx &= 0xffff; 642 if (apm_swab_batt_minutes) 643 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000; 644 if (sc->bios.r.edx == 0xffff) /* Time is unknown */ 645 app->ap_batt_time = -1; 646 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */ 647 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60; 648 else /* Time is in seconds */ 649 app->ap_batt_time = sc->bios.r.edx; 650 651 return 0; 652 } 653 654 655 /* get APM information */ 656 static int 657 apm_get_info(apm_info_t aip) 658 { 659 struct apm_softc *sc = &apm_softc; 660 struct apm_pwstatus aps; 661 662 bzero(&aps, sizeof(aps)); 663 aps.ap_device = PMDV_ALLDEV; 664 if (apm_get_pwstatus(&aps)) 665 return 1; 666 667 aip->ai_infoversion = 1; 668 aip->ai_acline = aps.ap_acline; 669 aip->ai_batt_stat = aps.ap_batt_stat; 670 aip->ai_batt_life = aps.ap_batt_life; 671 aip->ai_batt_time = aps.ap_batt_time; 672 aip->ai_major = (u_int)sc->majorversion; 673 aip->ai_minor = (u_int)sc->minorversion; 674 aip->ai_status = (u_int)sc->active; 675 676 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 677 sc->bios.r.ebx = 0; 678 sc->bios.r.ecx = 0; 679 sc->bios.r.edx = 0; 680 if (apm_bioscall()) { 681 aip->ai_batteries = 0xffffffff; /* Unknown */ 682 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 683 } else { 684 aip->ai_batteries = sc->bios.r.ebx & 0xff; 685 aip->ai_capabilities = sc->bios.r.ecx & 0xff; 686 } 687 688 bzero(aip->ai_spare, sizeof aip->ai_spare); 689 690 return 0; 691 } 692 693 694 /* inform APM BIOS that CPU is idle */ 695 void 696 apm_cpu_idle(void) 697 { 698 struct apm_softc *sc = &apm_softc; 699 700 if (sc->active) { 701 702 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE; 703 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 704 (void) apm_bioscall(); 705 } 706 /* 707 * Some APM implementation halts CPU in BIOS, whenever 708 * "CPU-idle" function are invoked, but swtch() of 709 * FreeBSD halts CPU, therefore, CPU is halted twice 710 * in the sched loop. It makes the interrupt latency 711 * terribly long and be able to cause a serious problem 712 * in interrupt processing. We prevent it by removing 713 * "hlt" operation from swtch() and managed it under 714 * APM driver. 715 */ 716 if (!sc->active || sc->always_halt_cpu) 717 halt(); /* wait for interrupt */ 718 } 719 720 /* inform APM BIOS that CPU is busy */ 721 void 722 apm_cpu_busy(void) 723 { 724 struct apm_softc *sc = &apm_softc; 725 726 /* 727 * The APM specification says this is only necessary if your BIOS 728 * slows down the processor in the idle task, otherwise it's not 729 * necessary. 730 */ 731 if (sc->slow_idle_cpu && sc->active) { 732 733 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY; 734 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 735 apm_bioscall(); 736 } 737 } 738 739 740 /* 741 * APM timeout routine: 742 * 743 * This routine is automatically called by timer once per second. 744 */ 745 746 static void 747 apm_timeout(void *dummy) 748 { 749 struct apm_softc *sc = &apm_softc; 750 751 if (apm_op_inprog) 752 apm_lastreq_notify(); 753 754 if (sc->standbys && sc->standby_countdown-- <= 0) 755 apm_do_standby(); 756 757 if (sc->suspends && sc->suspend_countdown-- <= 0) 758 apm_do_suspend(); 759 760 if (!sc->bios_busy) 761 apm_processevent(); 762 763 if (sc->active == 1) 764 /* Run slightly more oftan than 1 Hz */ 765 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1); 766 } 767 768 /* enable APM BIOS */ 769 static void 770 apm_event_enable(void) 771 { 772 struct apm_softc *sc = &apm_softc; 773 774 APM_DPRINT("called apm_event_enable()\n"); 775 776 if (sc == NULL || sc->initialized == 0) 777 return; 778 779 sc->active = 1; 780 apm_timeout(sc); 781 782 return; 783 } 784 785 /* disable APM BIOS */ 786 static void 787 apm_event_disable(void) 788 { 789 struct apm_softc *sc = &apm_softc; 790 791 APM_DPRINT("called apm_event_disable()\n"); 792 793 if (sc == NULL || sc->initialized == 0) 794 return; 795 796 untimeout(apm_timeout, NULL, apm_timeout_ch); 797 sc->active = 0; 798 799 return; 800 } 801 802 /* halt CPU in scheduling loop */ 803 static void 804 apm_halt_cpu(void) 805 { 806 struct apm_softc *sc = &apm_softc; 807 808 if (sc == NULL || sc->initialized == 0) 809 return; 810 811 sc->always_halt_cpu = 1; 812 813 return; 814 } 815 816 /* don't halt CPU in scheduling loop */ 817 static void 818 apm_not_halt_cpu(void) 819 { 820 struct apm_softc *sc = &apm_softc; 821 822 if (sc == NULL || sc->initialized == 0) 823 return; 824 825 sc->always_halt_cpu = 0; 826 827 return; 828 } 829 830 /* device driver definitions */ 831 832 /* 833 * Module event 834 */ 835 836 static int 837 apm_modevent(struct module *mod, int event, void *junk) 838 { 839 840 switch (event) { 841 case MOD_LOAD: 842 if (!cold) 843 return (EPERM); 844 break; 845 case MOD_UNLOAD: 846 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM) 847 return (EBUSY); 848 break; 849 default: 850 break; 851 } 852 853 return (0); 854 } 855 856 /* 857 * Create "connection point" 858 */ 859 static void 860 apm_identify(driver_t *driver, device_t parent) 861 { 862 device_t child; 863 864 if (!cold) { 865 printf("Don't load this driver from userland!!\n"); 866 return; 867 } 868 869 if (resource_disabled("apm", 0)) 870 return; 871 872 child = BUS_ADD_CHILD(parent, 0, "apm", 0); 873 if (child == NULL) 874 panic("apm_identify"); 875 } 876 877 /* 878 * probe for APM BIOS 879 */ 880 static int 881 apm_probe(device_t dev) 882 { 883 #define APM_KERNBASE KERNBASE 884 struct vm86frame vmf; 885 struct apm_softc *sc = &apm_softc; 886 #ifdef PC98 887 int rid; 888 #endif 889 890 device_set_desc(dev, "APM BIOS"); 891 if (device_get_unit(dev) > 0) { 892 printf("apm: Only one APM driver supported.\n"); 893 return ENXIO; 894 } 895 896 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 897 power_pm_get_type() != POWER_PM_TYPE_APM) { 898 printf("apm: Other PM system enabled.\n"); 899 return ENXIO; 900 } 901 902 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 903 bzero(&apm_softc, sizeof(apm_softc)); 904 vmf.vmf_ah = APM_BIOS; 905 vmf.vmf_al = APM_INSTCHECK; 906 vmf.vmf_bx = 0; 907 if (vm86_intcall(APM_INT, &vmf)) 908 return ENXIO; /* APM not found */ 909 if (vmf.vmf_bx != 0x504d) { 910 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); 911 return ENXIO; 912 } 913 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { 914 printf("apm: protected mode connections are not supported\n"); 915 return ENXIO; 916 } 917 918 apm_version = vmf.vmf_ax; 919 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); 920 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); 921 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); 922 923 vmf.vmf_ah = APM_BIOS; 924 vmf.vmf_al = APM_DISCONNECT; 925 vmf.vmf_bx = 0; 926 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ 927 928 #ifdef PC98 929 /* PC98 have bogos APM 32bit BIOS */ 930 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0) 931 return ENXIO; 932 rid = 0; 933 bus_set_resource(dev, SYS_RES_IOPORT, rid, 934 APM_NECSMM_PORT, APM_NECSMM_PORTSZ); 935 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 936 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 937 if (sc->sc_res == NULL) { 938 printf("apm: cannot open NEC smm device\n"); 939 return ENXIO; 940 } 941 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res); 942 943 vmf.vmf_ah = APM_BIOS; 944 vmf.vmf_al = APM_PROT32CONNECT; 945 vmf.vmf_bx = 0; 946 if (vm86_intcall(APM_INT, &vmf)) { 947 printf("apm: 32-bit connection error.\n"); 948 return (ENXIO); 949 } 950 951 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 952 sc->bios.seg.code32.limit = 0xffff; 953 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 954 sc->bios.seg.code16.limit = 0xffff; 955 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 956 sc->bios.seg.data.limit = 0xffff; 957 sc->bios.entry = vmf.vmf_ebx; 958 sc->connectmode = APM_PROT32CONNECT; 959 #else 960 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 961 vmf.vmf_ah = APM_BIOS; 962 vmf.vmf_al = APM_PROT32CONNECT; 963 vmf.vmf_bx = 0; 964 if (vm86_intcall(APM_INT, &vmf)) { 965 printf("apm: 32-bit connection error.\n"); 966 return (ENXIO); 967 } 968 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 969 sc->bios.seg.code32.limit = 0xffff; 970 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 971 sc->bios.seg.code16.limit = 0xffff; 972 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 973 sc->bios.seg.data.limit = 0xffff; 974 sc->bios.entry = vmf.vmf_ebx; 975 sc->connectmode = APM_PROT32CONNECT; 976 } else { 977 /* use 16-bit connection */ 978 vmf.vmf_ah = APM_BIOS; 979 vmf.vmf_al = APM_PROT16CONNECT; 980 vmf.vmf_bx = 0; 981 if (vm86_intcall(APM_INT, &vmf)) { 982 printf("apm: 16-bit connection error.\n"); 983 return (ENXIO); 984 } 985 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 986 sc->bios.seg.code16.limit = 0xffff; 987 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 988 sc->bios.seg.data.limit = 0xffff; 989 sc->bios.entry = vmf.vmf_bx; 990 sc->connectmode = APM_PROT16CONNECT; 991 } 992 #endif 993 return(0); 994 } 995 996 997 /* 998 * return 0 if the user will notice and handle the event, 999 * return 1 if the kernel driver should do so. 1000 */ 1001 static int 1002 apm_record_event(struct apm_softc *sc, u_int event_type) 1003 { 1004 struct apm_event_info *evp; 1005 1006 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 1007 return 1; /* no user waiting */ 1008 if (sc->event_count == APM_NEVENTS) 1009 return 1; /* overflow */ 1010 if (sc->event_filter[event_type] == 0) 1011 return 1; /* not registered */ 1012 evp = &sc->event_list[sc->event_ptr]; 1013 sc->event_count++; 1014 sc->event_ptr++; 1015 sc->event_ptr %= APM_NEVENTS; 1016 evp->type = event_type; 1017 evp->index = ++apm_evindex; 1018 selwakeuppri(&sc->sc_rsel, PZERO); 1019 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 1020 } 1021 1022 /* Power profile */ 1023 static void 1024 apm_power_profile(struct apm_softc *sc) 1025 { 1026 int state; 1027 struct apm_info info; 1028 static int apm_acline = 0; 1029 1030 if (apm_get_info(&info)) 1031 return; 1032 1033 if (apm_acline != info.ai_acline) { 1034 apm_acline = info.ai_acline; 1035 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY; 1036 power_profile_set_state(state); 1037 } 1038 } 1039 1040 /* Process APM event */ 1041 static void 1042 apm_processevent(void) 1043 { 1044 int apm_event; 1045 struct apm_softc *sc = &apm_softc; 1046 1047 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 1048 APM_DPRINT("Received APM Event: " #symbol "\n"); 1049 1050 do { 1051 apm_event = apm_getevent(); 1052 switch (apm_event) { 1053 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 1054 if (apm_op_inprog == 0) { 1055 apm_op_inprog++; 1056 if (apm_record_event(sc, apm_event)) { 1057 apm_suspend(PMST_STANDBY); 1058 } 1059 } 1060 break; 1061 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); 1062 if (apm_op_inprog == 0) { 1063 apm_op_inprog++; 1064 if (apm_record_event(sc, apm_event)) { 1065 apm_suspend(PMST_STANDBY); 1066 } 1067 } 1068 break; 1069 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 1070 apm_lastreq_notify(); 1071 if (apm_op_inprog == 0) { 1072 apm_op_inprog++; 1073 if (apm_record_event(sc, apm_event)) { 1074 apm_do_suspend(); 1075 } 1076 } 1077 return; /* XXX skip the rest */ 1078 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 1079 apm_lastreq_notify(); 1080 if (apm_op_inprog == 0) { 1081 apm_op_inprog++; 1082 if (apm_record_event(sc, apm_event)) { 1083 apm_do_suspend(); 1084 } 1085 } 1086 return; /* XXX skip the rest */ 1087 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 1088 apm_do_suspend(); 1089 break; 1090 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 1091 apm_record_event(sc, apm_event); 1092 apm_resume(); 1093 break; 1094 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 1095 apm_record_event(sc, apm_event); 1096 apm_resume(); 1097 break; 1098 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 1099 apm_record_event(sc, apm_event); 1100 break; 1101 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 1102 if (apm_record_event(sc, apm_event)) { 1103 apm_battery_low(); 1104 apm_suspend(PMST_SUSPEND); 1105 } 1106 break; 1107 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 1108 apm_record_event(sc, apm_event); 1109 apm_power_profile(sc); 1110 break; 1111 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 1112 apm_record_event(sc, apm_event); 1113 inittodr(0); /* adjust time to RTC */ 1114 break; 1115 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); 1116 apm_record_event(sc, apm_event); 1117 apm_power_profile(sc); 1118 break; 1119 case PMEV_NOEVENT: 1120 break; 1121 default: 1122 printf("Unknown Original APM Event 0x%x\n", apm_event); 1123 break; 1124 } 1125 } while (apm_event != PMEV_NOEVENT); 1126 #ifdef PC98 1127 apm_disable_smm(sc); 1128 #endif 1129 } 1130 1131 /* 1132 * Attach APM: 1133 * 1134 * Initialize APM driver 1135 */ 1136 1137 static int 1138 apm_attach(device_t dev) 1139 { 1140 struct apm_softc *sc = &apm_softc; 1141 int drv_version; 1142 #ifdef PC98 1143 int rid; 1144 #endif 1145 1146 if (device_get_flags(dev) & 0x20) 1147 statclock_disable = 1; 1148 1149 sc->initialized = 0; 1150 1151 /* Must be externally enabled */ 1152 sc->active = 0; 1153 1154 /* Always call HLT in idle loop */ 1155 sc->always_halt_cpu = 1; 1156 1157 getenv_int("debug.apm_debug", &apm_debug); 1158 1159 /* print bootstrap messages */ 1160 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version); 1161 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n", 1162 sc->bios.seg.code16.base, sc->bios.seg.data.base); 1163 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 1164 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 1165 is_enabled(!sc->disabled)); 1166 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n", 1167 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 1168 1169 #ifdef PC98 1170 rid = 0; 1171 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1172 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 1173 if (sc->sc_res == NULL) 1174 panic("%s: counldn't map I/O ports", device_get_name(dev)); 1175 sc->sc_iot = rman_get_bustag(sc->sc_res); 1176 sc->sc_ioh = rman_get_bushandle(sc->sc_res); 1177 1178 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110) 1179 apm_necsmm_addr = APM_NECSMM_PORT; 1180 else 1181 apm_necsmm_addr = 0; 1182 apm_necsmm_mask = ~APM_NECSMM_EN; 1183 #endif /* PC98 */ 1184 1185 /* 1186 * In one test, apm bios version was 1.02; an attempt to register 1187 * a 1.04 driver resulted in a 1.00 connection! Registering a 1188 * 1.02 driver resulted in a 1.02 connection. 1189 */ 1190 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 1191 for (; drv_version > 0x100; drv_version--) 1192 if (apm_driver_version(drv_version) == 0) 1193 break; 1194 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 1195 ((drv_version & 0x000f) >> 0); 1196 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 1197 ((apm_version & 0x0f00) >> 8); 1198 1199 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1200 1201 if (sc->intversion >= INTVERSION(1, 1)) 1202 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1203 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n", 1204 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 1205 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 1206 sc->majorversion, sc->minorversion); 1207 1208 1209 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1210 /* enable power management */ 1211 if (sc->disabled) { 1212 if (apm_enable_disable_pm(1)) { 1213 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n", 1214 (sc->bios.r.eax >> 8) & 0xff); 1215 } 1216 } 1217 1218 /* engage power managment (APM 1.1 or later) */ 1219 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1220 if (apm_engage_disengage_pm(1)) { 1221 APM_DPRINT("apm: *Warning* engage function failed err=[%x]", 1222 (sc->bios.r.eax >> 8) & 0xff); 1223 APM_DPRINT(" (Docked or using external power?).\n"); 1224 } 1225 } 1226 1227 /* Power the system off using APM */ 1228 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 1229 SHUTDOWN_PRI_LAST); 1230 1231 /* Register APM again to pass the correct argument of pm_func. */ 1232 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc); 1233 1234 sc->initialized = 1; 1235 sc->suspending = 0; 1236 1237 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm"); 1238 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl"); 1239 return 0; 1240 } 1241 1242 static int 1243 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td) 1244 { 1245 struct apm_softc *sc = &apm_softc; 1246 int ctl = APMDEV(dev); 1247 1248 if (sc == NULL || sc->initialized == 0) 1249 return (ENXIO); 1250 1251 switch (ctl) { 1252 case APMDEV_CTL: 1253 if (!(flag & FWRITE)) 1254 return EINVAL; 1255 if (sc->sc_flags & SCFLAG_OCTL) 1256 return EBUSY; 1257 sc->sc_flags |= SCFLAG_OCTL; 1258 bzero(sc->event_filter, sizeof sc->event_filter); 1259 break; 1260 case APMDEV_NORMAL: 1261 sc->sc_flags |= SCFLAG_ONORMAL; 1262 break; 1263 default: 1264 return ENXIO; 1265 break; 1266 } 1267 return 0; 1268 } 1269 1270 static int 1271 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td) 1272 { 1273 struct apm_softc *sc = &apm_softc; 1274 int ctl = APMDEV(dev); 1275 1276 switch (ctl) { 1277 case APMDEV_CTL: 1278 apm_lastreq_rejected(); 1279 sc->sc_flags &= ~SCFLAG_OCTL; 1280 bzero(sc->event_filter, sizeof sc->event_filter); 1281 break; 1282 case APMDEV_NORMAL: 1283 sc->sc_flags &= ~SCFLAG_ONORMAL; 1284 break; 1285 } 1286 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1287 sc->event_count = 0; 1288 sc->event_ptr = 0; 1289 } 1290 return 0; 1291 } 1292 1293 static int 1294 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1295 { 1296 struct apm_softc *sc = &apm_softc; 1297 struct apm_bios_arg *args; 1298 int error = 0; 1299 int ret; 1300 int newstate; 1301 1302 if (sc == NULL || sc->initialized == 0) 1303 return (ENXIO); 1304 1305 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd); 1306 switch (cmd) { 1307 case APMIO_SUSPEND: 1308 if (!(flag & FWRITE)) 1309 return (EPERM); 1310 if (sc->active) 1311 apm_suspend(PMST_SUSPEND); 1312 else 1313 error = EINVAL; 1314 break; 1315 1316 case APMIO_STANDBY: 1317 if (!(flag & FWRITE)) 1318 return (EPERM); 1319 if (sc->active) 1320 apm_suspend(PMST_STANDBY); 1321 else 1322 error = EINVAL; 1323 break; 1324 1325 case APMIO_GETINFO_OLD: 1326 { 1327 struct apm_info info; 1328 apm_info_old_t aiop; 1329 1330 if (apm_get_info(&info)) 1331 error = ENXIO; 1332 aiop = (apm_info_old_t)addr; 1333 aiop->ai_major = info.ai_major; 1334 aiop->ai_minor = info.ai_minor; 1335 aiop->ai_acline = info.ai_acline; 1336 aiop->ai_batt_stat = info.ai_batt_stat; 1337 aiop->ai_batt_life = info.ai_batt_life; 1338 aiop->ai_status = info.ai_status; 1339 } 1340 break; 1341 case APMIO_GETINFO: 1342 if (apm_get_info((apm_info_t)addr)) 1343 error = ENXIO; 1344 break; 1345 case APMIO_GETPWSTATUS: 1346 if (apm_get_pwstatus((apm_pwstatus_t)addr)) 1347 error = ENXIO; 1348 break; 1349 case APMIO_ENABLE: 1350 if (!(flag & FWRITE)) 1351 return (EPERM); 1352 apm_event_enable(); 1353 break; 1354 case APMIO_DISABLE: 1355 if (!(flag & FWRITE)) 1356 return (EPERM); 1357 apm_event_disable(); 1358 break; 1359 case APMIO_HALTCPU: 1360 if (!(flag & FWRITE)) 1361 return (EPERM); 1362 apm_halt_cpu(); 1363 break; 1364 case APMIO_NOTHALTCPU: 1365 if (!(flag & FWRITE)) 1366 return (EPERM); 1367 apm_not_halt_cpu(); 1368 break; 1369 case APMIO_DISPLAY: 1370 if (!(flag & FWRITE)) 1371 return (EPERM); 1372 newstate = *(int *)addr; 1373 if (apm_display(newstate)) 1374 error = ENXIO; 1375 break; 1376 case APMIO_BIOS: 1377 if (!(flag & FWRITE)) 1378 return (EPERM); 1379 /* XXX compatibility with the old interface */ 1380 args = (struct apm_bios_arg *)addr; 1381 sc->bios.r.eax = args->eax; 1382 sc->bios.r.ebx = args->ebx; 1383 sc->bios.r.ecx = args->ecx; 1384 sc->bios.r.edx = args->edx; 1385 sc->bios.r.esi = args->esi; 1386 sc->bios.r.edi = args->edi; 1387 if ((ret = apm_bioscall())) { 1388 /* 1389 * Return code 1 means bios call was unsuccessful. 1390 * Error code is stored in %ah. 1391 * Return code -1 means bios call was unsupported 1392 * in the APM BIOS version. 1393 */ 1394 if (ret == -1) { 1395 error = EINVAL; 1396 } 1397 } else { 1398 /* 1399 * Return code 0 means bios call was successful. 1400 * We need only %al and can discard %ah. 1401 */ 1402 sc->bios.r.eax &= 0xff; 1403 } 1404 args->eax = sc->bios.r.eax; 1405 args->ebx = sc->bios.r.ebx; 1406 args->ecx = sc->bios.r.ecx; 1407 args->edx = sc->bios.r.edx; 1408 args->esi = sc->bios.r.esi; 1409 args->edi = sc->bios.r.edi; 1410 break; 1411 default: 1412 error = EINVAL; 1413 break; 1414 } 1415 1416 /* for /dev/apmctl */ 1417 if (APMDEV(dev) == APMDEV_CTL) { 1418 struct apm_event_info *evp; 1419 int i; 1420 1421 error = 0; 1422 switch (cmd) { 1423 case APMIO_NEXTEVENT: 1424 if (!sc->event_count) { 1425 error = EAGAIN; 1426 } else { 1427 evp = (struct apm_event_info *)addr; 1428 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1429 i %= APM_NEVENTS; 1430 *evp = sc->event_list[i]; 1431 sc->event_count--; 1432 } 1433 break; 1434 case APMIO_REJECTLASTREQ: 1435 if (apm_lastreq_rejected()) { 1436 error = EINVAL; 1437 } 1438 break; 1439 default: 1440 error = EINVAL; 1441 break; 1442 } 1443 } 1444 1445 return error; 1446 } 1447 1448 static int 1449 apmwrite(struct cdev *dev, struct uio *uio, int ioflag) 1450 { 1451 struct apm_softc *sc = &apm_softc; 1452 u_int event_type; 1453 int error; 1454 u_char enabled; 1455 1456 if (APMDEV(dev) != APMDEV_CTL) 1457 return(ENODEV); 1458 if (uio->uio_resid != sizeof(u_int)) 1459 return(E2BIG); 1460 1461 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1462 return(error); 1463 1464 if (event_type < 0 || event_type >= APM_NPMEV) 1465 return(EINVAL); 1466 1467 if (sc->event_filter[event_type] == 0) { 1468 enabled = 1; 1469 } else { 1470 enabled = 0; 1471 } 1472 sc->event_filter[event_type] = enabled; 1473 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1474 1475 return uio->uio_resid; 1476 } 1477 1478 static int 1479 apmpoll(struct cdev *dev, int events, struct thread *td) 1480 { 1481 struct apm_softc *sc = &apm_softc; 1482 int revents = 0; 1483 1484 if (events & (POLLIN | POLLRDNORM)) { 1485 if (sc->event_count) { 1486 revents |= events & (POLLIN | POLLRDNORM); 1487 } else { 1488 selrecord(td, &sc->sc_rsel); 1489 } 1490 } 1491 1492 return (revents); 1493 } 1494 1495 static device_method_t apm_methods[] = { 1496 /* Device interface */ 1497 DEVMETHOD(device_identify, apm_identify), 1498 DEVMETHOD(device_probe, apm_probe), 1499 DEVMETHOD(device_attach, apm_attach), 1500 1501 { 0, 0 } 1502 }; 1503 1504 static driver_t apm_driver = { 1505 "apm", 1506 apm_methods, 1507 1, /* no softc (XXX) */ 1508 }; 1509 1510 static devclass_t apm_devclass; 1511 1512 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0); 1513 MODULE_VERSION(apm, 1); 1514 1515 static int 1516 apm_pm_func(u_long cmd, void *arg, ...) 1517 { 1518 int state, apm_state; 1519 int error; 1520 va_list ap; 1521 1522 error = 0; 1523 switch (cmd) { 1524 case POWER_CMD_SUSPEND: 1525 va_start(ap, arg); 1526 state = va_arg(ap, int); 1527 va_end(ap); 1528 1529 switch (state) { 1530 case POWER_SLEEP_STATE_STANDBY: 1531 apm_state = PMST_STANDBY; 1532 break; 1533 case POWER_SLEEP_STATE_SUSPEND: 1534 case POWER_SLEEP_STATE_HIBERNATE: 1535 apm_state = PMST_SUSPEND; 1536 break; 1537 default: 1538 error = EINVAL; 1539 goto out; 1540 } 1541 1542 apm_suspend(apm_state); 1543 break; 1544 1545 default: 1546 error = EINVAL; 1547 goto out; 1548 } 1549 1550 out: 1551 return (error); 1552 } 1553 1554 static void 1555 apm_pm_register(void *arg) 1556 { 1557 1558 if (!resource_disabled("apm", 0)) 1559 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL); 1560 } 1561 1562 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);
Cache object: 66915df4815d85e63f73101f288d0f9b
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