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/condvar.h> 27 #include <sys/eventhandler.h> 28 #include <sys/fcntl.h> 29 #include <sys/kernel.h> 30 #include <sys/kthread.h> 31 #include <sys/lock.h> 32 #include <sys/module.h> 33 #include <sys/mutex.h> 34 #include <sys/poll.h> 35 #include <sys/power.h> 36 #include <sys/reboot.h> 37 #include <sys/selinfo.h> 38 #include <sys/signalvar.h> 39 #include <sys/sysctl.h> 40 #include <sys/syslog.h> 41 #include <sys/time.h> 42 #include <sys/uio.h> 43 44 #include <machine/apm_bios.h> 45 #include <machine/clock.h> 46 #include <machine/endian.h> 47 #include <machine/pc/bios.h> 48 #include <machine/cpufunc.h> 49 #include <machine/segments.h> 50 #include <machine/stdarg.h> 51 #include <machine/vm86.h> 52 53 #include <machine/bus.h> 54 #include <machine/resource.h> 55 #include <sys/rman.h> 56 57 #include <vm/vm.h> 58 #include <vm/pmap.h> 59 #include <vm/vm_param.h> 60 61 #include <i386/bios/apm.h> 62 #include <isa/rtc.h> 63 64 /* Used by the apm_saver screen saver module */ 65 int apm_display(int newstate); 66 struct apm_softc apm_softc; 67 68 static void apm_resume(void); 69 static int apm_bioscall(void); 70 static int apm_check_function_supported(u_int version, u_int func); 71 72 static int apm_pm_func(u_long, void*, ...); 73 74 static u_long apm_version; 75 76 int apm_evindex; 77 78 #define SCFLAG_ONORMAL 0x0000001 79 #define SCFLAG_OCTL 0x0000002 80 #define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL) 81 82 #define APMDEV_NORMAL 0 83 #define APMDEV_CTL 1 84 85 #ifdef PC98 86 extern int bios32_apm98(struct bios_regs *, u_int, u_short); 87 88 /* PC98's SMM definition */ 89 #define APM_NECSMM_PORT 0x6b8e 90 #define APM_NECSMM_PORTSZ 1 91 #define APM_NECSMM_EN 0x10 92 static __inline void apm_enable_smm(struct apm_softc *); 93 static __inline void apm_disable_smm(struct apm_softc *); 94 int apm_necsmm_addr; 95 u_int32_t apm_necsmm_mask; 96 #endif 97 98 static struct apmhook *hook[NAPM_HOOK]; /* XXX */ 99 100 #define is_enabled(foo) ((foo) ? "enabled" : "disabled") 101 102 /* Map version number to integer (keeps ordering of version numbers) */ 103 #define INTVERSION(major, minor) ((major)*100 + (minor)) 104 105 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 EVENTHANDLER_INVOKE(power_suspend); 488 489 /* 490 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since 491 * non-MPSAFE drivers need this. 492 */ 493 mtx_lock(&Giant); 494 error = DEVICE_SUSPEND(root_bus); 495 if (error) 496 goto backout; 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 mtx_unlock(&Giant); 503 return; 504 } 505 506 /* Failure, 'resume' the system again */ 507 apm_execute_hook(hook[APM_HOOK_RESUME]); 508 DEVICE_RESUME(root_bus); 509 backout: 510 mtx_unlock(&Giant); 511 EVENTHANDLER_INVOKE(power_resume); 512 } 513 514 static void 515 apm_do_standby(void) 516 { 517 struct apm_softc *sc = &apm_softc; 518 519 if (sc == NULL || sc->initialized == 0) 520 return; 521 522 apm_op_inprog = 0; 523 sc->standbys = sc->standby_countdown = 0; 524 525 /* 526 * As far as standby, we don't need to execute 527 * all of suspend hooks. 528 */ 529 if (apm_suspend_system(PMST_STANDBY) == 0) 530 apm_processevent(); 531 return; 532 } 533 534 static void 535 apm_lastreq_notify(void) 536 { 537 struct apm_softc *sc = &apm_softc; 538 539 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 540 sc->bios.r.ebx = PMDV_ALLDEV; 541 sc->bios.r.ecx = PMST_LASTREQNOTIFY; 542 sc->bios.r.edx = 0; 543 apm_bioscall(); 544 } 545 546 static int 547 apm_lastreq_rejected(void) 548 { 549 struct apm_softc *sc = &apm_softc; 550 551 if (apm_op_inprog == 0) { 552 return 1; /* no operation in progress */ 553 } 554 555 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 556 sc->bios.r.ebx = PMDV_ALLDEV; 557 sc->bios.r.ecx = PMST_LASTREQREJECT; 558 sc->bios.r.edx = 0; 559 560 if (apm_bioscall()) { 561 APM_DPRINT("apm_lastreq_rejected: failed\n"); 562 return 1; 563 } 564 apm_op_inprog = 0; 565 return 0; 566 } 567 568 /* 569 * Public interface to the suspend/resume: 570 * 571 * Execute suspend and resume hook before and after sleep, respectively. 572 * 573 */ 574 575 void 576 apm_suspend(int state) 577 { 578 struct apm_softc *sc = &apm_softc; 579 580 if (sc == NULL || sc->initialized == 0) 581 return; 582 583 switch (state) { 584 case PMST_SUSPEND: 585 if (sc->suspends) 586 return; 587 sc->suspends++; 588 sc->suspend_countdown = apm_suspend_delay; 589 break; 590 case PMST_STANDBY: 591 if (sc->standbys) 592 return; 593 sc->standbys++; 594 sc->standby_countdown = apm_standby_delay; 595 break; 596 default: 597 printf("apm_suspend: Unknown Suspend state 0x%x\n", state); 598 return; 599 } 600 601 apm_op_inprog++; 602 apm_lastreq_notify(); 603 } 604 605 static void 606 apm_resume(void) 607 { 608 struct apm_softc *sc = &apm_softc; 609 610 if (sc == NULL || sc->initialized == 0 || sc->suspending == 0) 611 return; 612 613 sc->suspending = 0; 614 apm_execute_hook(hook[APM_HOOK_RESUME]); 615 mtx_lock(&Giant); 616 DEVICE_RESUME(root_bus); 617 mtx_unlock(&Giant); 618 EVENTHANDLER_INVOKE(power_resume); 619 } 620 621 622 /* get power status per battery */ 623 static int 624 apm_get_pwstatus(apm_pwstatus_t app) 625 { 626 struct apm_softc *sc = &apm_softc; 627 628 if (app->ap_device != PMDV_ALLDEV && 629 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL)) 630 return 1; 631 632 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 633 sc->bios.r.ebx = app->ap_device; 634 sc->bios.r.ecx = 0; 635 sc->bios.r.edx = 0xffff; /* default to unknown battery time */ 636 637 if (apm_bioscall()) 638 return 1; 639 640 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff; 641 app->ap_batt_stat = sc->bios.r.ebx & 0xff; 642 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff; 643 app->ap_batt_life = sc->bios.r.ecx & 0xff; 644 sc->bios.r.edx &= 0xffff; 645 if (apm_swab_batt_minutes) 646 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000; 647 if (sc->bios.r.edx == 0xffff) /* Time is unknown */ 648 app->ap_batt_time = -1; 649 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */ 650 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60; 651 else /* Time is in seconds */ 652 app->ap_batt_time = sc->bios.r.edx; 653 654 return 0; 655 } 656 657 658 /* get APM information */ 659 static int 660 apm_get_info(apm_info_t aip) 661 { 662 struct apm_softc *sc = &apm_softc; 663 struct apm_pwstatus aps; 664 665 bzero(&aps, sizeof(aps)); 666 aps.ap_device = PMDV_ALLDEV; 667 if (apm_get_pwstatus(&aps)) 668 return 1; 669 670 aip->ai_infoversion = 1; 671 aip->ai_acline = aps.ap_acline; 672 aip->ai_batt_stat = aps.ap_batt_stat; 673 aip->ai_batt_life = aps.ap_batt_life; 674 aip->ai_batt_time = aps.ap_batt_time; 675 aip->ai_major = (u_int)sc->majorversion; 676 aip->ai_minor = (u_int)sc->minorversion; 677 aip->ai_status = (u_int)sc->active; 678 679 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 680 sc->bios.r.ebx = 0; 681 sc->bios.r.ecx = 0; 682 sc->bios.r.edx = 0; 683 if (apm_bioscall()) { 684 aip->ai_batteries = 0xffffffff; /* Unknown */ 685 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 686 } else { 687 aip->ai_batteries = sc->bios.r.ebx & 0xff; 688 aip->ai_capabilities = sc->bios.r.ecx & 0xff; 689 } 690 691 bzero(aip->ai_spare, sizeof aip->ai_spare); 692 693 return 0; 694 } 695 696 697 /* inform APM BIOS that CPU is idle */ 698 void 699 apm_cpu_idle(void) 700 { 701 struct apm_softc *sc = &apm_softc; 702 703 if (sc->active) { 704 705 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE; 706 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 707 (void) apm_bioscall(); 708 } 709 /* 710 * Some APM implementation halts CPU in BIOS, whenever 711 * "CPU-idle" function are invoked, but swtch() of 712 * FreeBSD halts CPU, therefore, CPU is halted twice 713 * in the sched loop. It makes the interrupt latency 714 * terribly long and be able to cause a serious problem 715 * in interrupt processing. We prevent it by removing 716 * "hlt" operation from swtch() and managed it under 717 * APM driver. 718 */ 719 if (!sc->active || sc->always_halt_cpu) 720 halt(); /* wait for interrupt */ 721 } 722 723 /* inform APM BIOS that CPU is busy */ 724 void 725 apm_cpu_busy(void) 726 { 727 struct apm_softc *sc = &apm_softc; 728 729 /* 730 * The APM specification says this is only necessary if your BIOS 731 * slows down the processor in the idle task, otherwise it's not 732 * necessary. 733 */ 734 if (sc->slow_idle_cpu && sc->active) { 735 736 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY; 737 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 738 apm_bioscall(); 739 } 740 } 741 742 743 /* 744 * APM thread loop. 745 * 746 * This routine wakes up from time to time to deal with delaying the 747 * suspend of the system, or other events. 748 */ 749 static void 750 apm_event_thread(void *arg) 751 { 752 struct apm_softc *sc = &apm_softc; 753 754 sc->running = 1; 755 while (sc->active) { 756 if (apm_op_inprog) 757 apm_lastreq_notify(); 758 if (sc->standbys && sc->standby_countdown-- <= 0) 759 apm_do_standby(); 760 if (sc->suspends && sc->suspend_countdown-- <= 0) 761 apm_do_suspend(); 762 if (!sc->bios_busy) 763 apm_processevent(); 764 mtx_lock(&sc->mtx); 765 cv_timedwait(&sc->cv, &sc->mtx, 10 * hz / 9); 766 mtx_unlock(&sc->mtx); 767 } 768 sc->running = 0; 769 kproc_exit(0); 770 } 771 772 /* enable APM BIOS */ 773 static void 774 apm_event_enable(void) 775 { 776 struct apm_softc *sc = &apm_softc; 777 778 APM_DPRINT("called apm_event_enable()\n"); 779 780 if (sc == NULL || sc->initialized == 0) 781 return; 782 783 /* Start the thread */ 784 sc->active = 1; 785 if (kproc_create(apm_event_thread, sc, &sc->event_thread, 0, 0, 786 "apm worker")) 787 panic("Cannot create apm worker thread"); 788 789 return; 790 } 791 792 /* disable APM BIOS */ 793 static void 794 apm_event_disable(void) 795 { 796 struct apm_softc *sc = &apm_softc; 797 798 APM_DPRINT("called apm_event_disable()\n"); 799 800 if (sc == NULL || sc->initialized == 0) 801 return; 802 803 mtx_lock(&sc->mtx); 804 sc->active = 0; 805 while (sc->running) { 806 cv_broadcast(&sc->cv); 807 msleep(sc->event_thread, &sc->mtx, PWAIT, "apmdie", 0); 808 } 809 mtx_unlock(&sc->mtx); 810 sc->event_thread = NULL; 811 return; 812 } 813 814 /* halt CPU in scheduling loop */ 815 static void 816 apm_halt_cpu(void) 817 { 818 struct apm_softc *sc = &apm_softc; 819 820 if (sc == NULL || sc->initialized == 0) 821 return; 822 823 sc->always_halt_cpu = 1; 824 825 return; 826 } 827 828 /* don't halt CPU in scheduling loop */ 829 static void 830 apm_not_halt_cpu(void) 831 { 832 struct apm_softc *sc = &apm_softc; 833 834 if (sc == NULL || sc->initialized == 0) 835 return; 836 837 sc->always_halt_cpu = 0; 838 839 return; 840 } 841 842 /* device driver definitions */ 843 844 /* 845 * Module event 846 */ 847 848 static int 849 apm_modevent(struct module *mod, int event, void *junk) 850 { 851 852 switch (event) { 853 case MOD_LOAD: 854 if (!cold) 855 return (EPERM); 856 break; 857 case MOD_UNLOAD: 858 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM) 859 return (EBUSY); 860 break; 861 default: 862 break; 863 } 864 865 return (0); 866 } 867 868 /* 869 * Create "connection point" 870 */ 871 static void 872 apm_identify(driver_t *driver, device_t parent) 873 { 874 device_t child; 875 876 if (!cold) { 877 printf("Don't load this driver from userland!!\n"); 878 return; 879 } 880 881 if (resource_disabled("apm", 0)) 882 return; 883 884 child = BUS_ADD_CHILD(parent, 0, "apm", 0); 885 if (child == NULL) 886 panic("apm_identify"); 887 } 888 889 /* 890 * probe for APM BIOS 891 */ 892 static int 893 apm_probe(device_t dev) 894 { 895 #define APM_KERNBASE KERNBASE 896 struct vm86frame vmf; 897 struct apm_softc *sc = &apm_softc; 898 #ifdef PC98 899 int rid; 900 #endif 901 902 device_set_desc(dev, "APM BIOS"); 903 if (device_get_unit(dev) > 0) { 904 printf("apm: Only one APM driver supported.\n"); 905 return ENXIO; 906 } 907 908 if (power_pm_get_type() != POWER_PM_TYPE_NONE && 909 power_pm_get_type() != POWER_PM_TYPE_APM) { 910 printf("apm: Other PM system enabled.\n"); 911 return ENXIO; 912 } 913 914 bzero(&vmf, sizeof(struct vm86frame)); /* safety */ 915 bzero(&apm_softc, sizeof(apm_softc)); 916 vmf.vmf_ah = APM_BIOS; 917 vmf.vmf_al = APM_INSTCHECK; 918 vmf.vmf_bx = 0; 919 if (vm86_intcall(APM_INT, &vmf)) 920 return ENXIO; /* APM not found */ 921 if (vmf.vmf_bx != 0x504d) { 922 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); 923 return ENXIO; 924 } 925 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { 926 printf("apm: protected mode connections are not supported\n"); 927 return ENXIO; 928 } 929 930 apm_version = vmf.vmf_ax; 931 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); 932 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); 933 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); 934 935 vmf.vmf_ah = APM_BIOS; 936 vmf.vmf_al = APM_DISCONNECT; 937 vmf.vmf_bx = 0; 938 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ 939 940 #ifdef PC98 941 /* PC98 have bogos APM 32bit BIOS */ 942 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0) 943 return ENXIO; 944 rid = 0; 945 bus_set_resource(dev, SYS_RES_IOPORT, rid, 946 APM_NECSMM_PORT, APM_NECSMM_PORTSZ); 947 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 948 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 949 if (sc->sc_res == NULL) { 950 printf("apm: cannot open NEC smm device\n"); 951 return ENXIO; 952 } 953 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res); 954 955 vmf.vmf_ah = APM_BIOS; 956 vmf.vmf_al = APM_PROT32CONNECT; 957 vmf.vmf_bx = 0; 958 if (vm86_intcall(APM_INT, &vmf)) { 959 printf("apm: 32-bit connection error.\n"); 960 return (ENXIO); 961 } 962 963 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 964 sc->bios.seg.code32.limit = 0xffff; 965 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 966 sc->bios.seg.code16.limit = 0xffff; 967 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 968 sc->bios.seg.data.limit = 0xffff; 969 sc->bios.entry = vmf.vmf_ebx; 970 sc->connectmode = APM_PROT32CONNECT; 971 #else 972 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 973 vmf.vmf_ah = APM_BIOS; 974 vmf.vmf_al = APM_PROT32CONNECT; 975 vmf.vmf_bx = 0; 976 if (vm86_intcall(APM_INT, &vmf)) { 977 printf("apm: 32-bit connection error.\n"); 978 return (ENXIO); 979 } 980 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 981 sc->bios.seg.code32.limit = 0xffff; 982 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 983 sc->bios.seg.code16.limit = 0xffff; 984 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 985 sc->bios.seg.data.limit = 0xffff; 986 sc->bios.entry = vmf.vmf_ebx; 987 sc->connectmode = APM_PROT32CONNECT; 988 } else { 989 /* use 16-bit connection */ 990 vmf.vmf_ah = APM_BIOS; 991 vmf.vmf_al = APM_PROT16CONNECT; 992 vmf.vmf_bx = 0; 993 if (vm86_intcall(APM_INT, &vmf)) { 994 printf("apm: 16-bit connection error.\n"); 995 return (ENXIO); 996 } 997 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 998 sc->bios.seg.code16.limit = 0xffff; 999 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 1000 sc->bios.seg.data.limit = 0xffff; 1001 sc->bios.entry = vmf.vmf_bx; 1002 sc->connectmode = APM_PROT16CONNECT; 1003 } 1004 #endif 1005 return(0); 1006 } 1007 1008 1009 /* 1010 * return 0 if the user will notice and handle the event, 1011 * return 1 if the kernel driver should do so. 1012 */ 1013 static int 1014 apm_record_event(struct apm_softc *sc, u_int event_type) 1015 { 1016 struct apm_event_info *evp; 1017 1018 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 1019 return 1; /* no user waiting */ 1020 if (sc->event_count == APM_NEVENTS) 1021 return 1; /* overflow */ 1022 if (sc->event_filter[event_type] == 0) 1023 return 1; /* not registered */ 1024 evp = &sc->event_list[sc->event_ptr]; 1025 sc->event_count++; 1026 sc->event_ptr++; 1027 sc->event_ptr %= APM_NEVENTS; 1028 evp->type = event_type; 1029 evp->index = ++apm_evindex; 1030 selwakeuppri(&sc->sc_rsel, PZERO); 1031 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 1032 } 1033 1034 /* Power profile */ 1035 static void 1036 apm_power_profile(struct apm_softc *sc) 1037 { 1038 int state; 1039 struct apm_info info; 1040 static int apm_acline = 0; 1041 1042 if (apm_get_info(&info)) 1043 return; 1044 1045 if (apm_acline != info.ai_acline) { 1046 apm_acline = info.ai_acline; 1047 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY; 1048 power_profile_set_state(state); 1049 } 1050 } 1051 1052 /* Process APM event */ 1053 static void 1054 apm_processevent(void) 1055 { 1056 int apm_event; 1057 struct apm_softc *sc = &apm_softc; 1058 1059 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 1060 APM_DPRINT("Received APM Event: " #symbol "\n"); 1061 1062 do { 1063 apm_event = apm_getevent(); 1064 switch (apm_event) { 1065 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 1066 if (apm_op_inprog == 0) { 1067 apm_op_inprog++; 1068 if (apm_record_event(sc, apm_event)) { 1069 apm_suspend(PMST_STANDBY); 1070 } 1071 } 1072 break; 1073 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); 1074 if (apm_op_inprog == 0) { 1075 apm_op_inprog++; 1076 if (apm_record_event(sc, apm_event)) { 1077 apm_suspend(PMST_STANDBY); 1078 } 1079 } 1080 break; 1081 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 1082 apm_lastreq_notify(); 1083 if (apm_op_inprog == 0) { 1084 apm_op_inprog++; 1085 if (apm_record_event(sc, apm_event)) { 1086 apm_do_suspend(); 1087 } 1088 } 1089 return; /* XXX skip the rest */ 1090 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 1091 apm_lastreq_notify(); 1092 if (apm_op_inprog == 0) { 1093 apm_op_inprog++; 1094 if (apm_record_event(sc, apm_event)) { 1095 apm_do_suspend(); 1096 } 1097 } 1098 return; /* XXX skip the rest */ 1099 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 1100 apm_do_suspend(); 1101 break; 1102 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 1103 apm_record_event(sc, apm_event); 1104 apm_resume(); 1105 break; 1106 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 1107 apm_record_event(sc, apm_event); 1108 apm_resume(); 1109 break; 1110 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 1111 apm_record_event(sc, apm_event); 1112 break; 1113 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 1114 if (apm_record_event(sc, apm_event)) { 1115 apm_battery_low(); 1116 apm_suspend(PMST_SUSPEND); 1117 } 1118 break; 1119 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 1120 apm_record_event(sc, apm_event); 1121 apm_power_profile(sc); 1122 break; 1123 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 1124 apm_record_event(sc, apm_event); 1125 inittodr(0); /* adjust time to RTC */ 1126 break; 1127 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); 1128 apm_record_event(sc, apm_event); 1129 apm_power_profile(sc); 1130 break; 1131 case PMEV_NOEVENT: 1132 break; 1133 default: 1134 printf("Unknown Original APM Event 0x%x\n", apm_event); 1135 break; 1136 } 1137 } while (apm_event != PMEV_NOEVENT); 1138 #ifdef PC98 1139 apm_disable_smm(sc); 1140 #endif 1141 } 1142 1143 /* 1144 * Attach APM: 1145 * 1146 * Initialize APM driver 1147 */ 1148 1149 static int 1150 apm_attach(device_t dev) 1151 { 1152 struct apm_softc *sc = &apm_softc; 1153 int drv_version; 1154 #ifdef PC98 1155 int rid; 1156 #endif 1157 mtx_init(&sc->mtx, device_get_nameunit(dev), "apm", MTX_DEF); 1158 cv_init(&sc->cv, "cbb cv"); 1159 1160 #ifndef PC98 1161 if (device_get_flags(dev) & 0x20) 1162 atrtcclock_disable = 1; 1163 #endif 1164 1165 sc->initialized = 0; 1166 1167 /* Must be externally enabled */ 1168 sc->active = 0; 1169 1170 /* Always call HLT in idle loop */ 1171 sc->always_halt_cpu = 1; 1172 1173 getenv_int("debug.apm_debug", &apm_debug); 1174 1175 /* print bootstrap messages */ 1176 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version); 1177 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n", 1178 sc->bios.seg.code16.base, sc->bios.seg.data.base); 1179 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 1180 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 1181 is_enabled(!sc->disabled)); 1182 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n", 1183 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 1184 1185 #ifdef PC98 1186 rid = 0; 1187 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1188 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 1189 if (sc->sc_res == NULL) 1190 panic("%s: counldn't map I/O ports", device_get_name(dev)); 1191 sc->sc_iot = rman_get_bustag(sc->sc_res); 1192 sc->sc_ioh = rman_get_bushandle(sc->sc_res); 1193 1194 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110) 1195 apm_necsmm_addr = APM_NECSMM_PORT; 1196 else 1197 apm_necsmm_addr = 0; 1198 apm_necsmm_mask = ~APM_NECSMM_EN; 1199 #endif /* PC98 */ 1200 1201 /* 1202 * In one test, apm bios version was 1.02; an attempt to register 1203 * a 1.04 driver resulted in a 1.00 connection! Registering a 1204 * 1.02 driver resulted in a 1.02 connection. 1205 */ 1206 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 1207 for (; drv_version > 0x100; drv_version--) 1208 if (apm_driver_version(drv_version) == 0) 1209 break; 1210 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 1211 ((drv_version & 0x000f) >> 0); 1212 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 1213 ((apm_version & 0x0f00) >> 8); 1214 1215 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1216 1217 if (sc->intversion >= INTVERSION(1, 1)) 1218 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1219 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n", 1220 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 1221 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 1222 sc->majorversion, sc->minorversion); 1223 1224 1225 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1226 /* enable power management */ 1227 if (sc->disabled) { 1228 if (apm_enable_disable_pm(1)) { 1229 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n", 1230 (sc->bios.r.eax >> 8) & 0xff); 1231 } 1232 } 1233 1234 /* engage power managment (APM 1.1 or later) */ 1235 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1236 if (apm_engage_disengage_pm(1)) { 1237 APM_DPRINT("apm: *Warning* engage function failed err=[%x]", 1238 (sc->bios.r.eax >> 8) & 0xff); 1239 APM_DPRINT(" (Docked or using external power?).\n"); 1240 } 1241 } 1242 1243 /* Power the system off using APM */ 1244 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 1245 SHUTDOWN_PRI_LAST); 1246 1247 /* Register APM again to pass the correct argument of pm_func. */ 1248 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc); 1249 1250 sc->initialized = 1; 1251 sc->suspending = 0; 1252 sc->running = 0; 1253 1254 make_dev(&apm_cdevsw, APMDEV_NORMAL, 1255 UID_ROOT, GID_OPERATOR, 0664, "apm"); 1256 make_dev(&apm_cdevsw, APMDEV_CTL, 1257 UID_ROOT, GID_OPERATOR, 0660, "apmctl"); 1258 return 0; 1259 } 1260 1261 static int 1262 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td) 1263 { 1264 struct apm_softc *sc = &apm_softc; 1265 1266 if (sc == NULL || sc->initialized == 0) 1267 return (ENXIO); 1268 1269 switch (dev2unit(dev)) { 1270 case APMDEV_CTL: 1271 if (!(flag & FWRITE)) 1272 return EINVAL; 1273 if (sc->sc_flags & SCFLAG_OCTL) 1274 return EBUSY; 1275 sc->sc_flags |= SCFLAG_OCTL; 1276 bzero(sc->event_filter, sizeof sc->event_filter); 1277 break; 1278 case APMDEV_NORMAL: 1279 sc->sc_flags |= SCFLAG_ONORMAL; 1280 break; 1281 } 1282 return 0; 1283 } 1284 1285 static int 1286 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td) 1287 { 1288 struct apm_softc *sc = &apm_softc; 1289 1290 switch (dev2unit(dev)) { 1291 case APMDEV_CTL: 1292 apm_lastreq_rejected(); 1293 sc->sc_flags &= ~SCFLAG_OCTL; 1294 bzero(sc->event_filter, sizeof sc->event_filter); 1295 break; 1296 case APMDEV_NORMAL: 1297 sc->sc_flags &= ~SCFLAG_ONORMAL; 1298 break; 1299 } 1300 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1301 sc->event_count = 0; 1302 sc->event_ptr = 0; 1303 } 1304 return 0; 1305 } 1306 1307 static int 1308 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 1309 { 1310 struct apm_softc *sc = &apm_softc; 1311 struct apm_bios_arg *args; 1312 int error = 0; 1313 int ret; 1314 int newstate; 1315 1316 if (sc == NULL || sc->initialized == 0) 1317 return (ENXIO); 1318 1319 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd); 1320 switch (cmd) { 1321 case APMIO_SUSPEND: 1322 if (!(flag & FWRITE)) 1323 return (EPERM); 1324 if (sc->active) 1325 apm_suspend(PMST_SUSPEND); 1326 else 1327 error = EINVAL; 1328 break; 1329 1330 case APMIO_STANDBY: 1331 if (!(flag & FWRITE)) 1332 return (EPERM); 1333 if (sc->active) 1334 apm_suspend(PMST_STANDBY); 1335 else 1336 error = EINVAL; 1337 break; 1338 1339 case APMIO_GETINFO_OLD: 1340 { 1341 struct apm_info info; 1342 apm_info_old_t aiop; 1343 1344 if (apm_get_info(&info)) 1345 error = ENXIO; 1346 aiop = (apm_info_old_t)addr; 1347 aiop->ai_major = info.ai_major; 1348 aiop->ai_minor = info.ai_minor; 1349 aiop->ai_acline = info.ai_acline; 1350 aiop->ai_batt_stat = info.ai_batt_stat; 1351 aiop->ai_batt_life = info.ai_batt_life; 1352 aiop->ai_status = info.ai_status; 1353 } 1354 break; 1355 case APMIO_GETINFO: 1356 if (apm_get_info((apm_info_t)addr)) 1357 error = ENXIO; 1358 break; 1359 case APMIO_GETPWSTATUS: 1360 if (apm_get_pwstatus((apm_pwstatus_t)addr)) 1361 error = ENXIO; 1362 break; 1363 case APMIO_ENABLE: 1364 if (!(flag & FWRITE)) 1365 return (EPERM); 1366 apm_event_enable(); 1367 break; 1368 case APMIO_DISABLE: 1369 if (!(flag & FWRITE)) 1370 return (EPERM); 1371 apm_event_disable(); 1372 break; 1373 case APMIO_HALTCPU: 1374 if (!(flag & FWRITE)) 1375 return (EPERM); 1376 apm_halt_cpu(); 1377 break; 1378 case APMIO_NOTHALTCPU: 1379 if (!(flag & FWRITE)) 1380 return (EPERM); 1381 apm_not_halt_cpu(); 1382 break; 1383 case APMIO_DISPLAY: 1384 if (!(flag & FWRITE)) 1385 return (EPERM); 1386 newstate = *(int *)addr; 1387 if (apm_display(newstate)) 1388 error = ENXIO; 1389 break; 1390 case APMIO_BIOS: 1391 if (!(flag & FWRITE)) 1392 return (EPERM); 1393 /* XXX compatibility with the old interface */ 1394 args = (struct apm_bios_arg *)addr; 1395 #ifdef PC98 1396 if (((args->eax >> 8) & 0xff) == 0x53) { 1397 sc->bios.r.eax = args->eax & ~0xffff; 1398 sc->bios.r.eax |= APM_BIOS << 8; 1399 switch (args->eax & 0xff) { 1400 case 0x0a: 1401 sc->bios.r.eax |= APM_GETPWSTATUS; 1402 break; 1403 case 0x0e: 1404 sc->bios.r.eax |= APM_DRVVERSION; 1405 break; 1406 default: 1407 sc->bios.r.eax |= args->eax & 0xff; 1408 break; 1409 } 1410 } else 1411 #endif 1412 sc->bios.r.eax = args->eax; 1413 sc->bios.r.ebx = args->ebx; 1414 sc->bios.r.ecx = args->ecx; 1415 sc->bios.r.edx = args->edx; 1416 sc->bios.r.esi = args->esi; 1417 sc->bios.r.edi = args->edi; 1418 if ((ret = apm_bioscall())) { 1419 /* 1420 * Return code 1 means bios call was unsuccessful. 1421 * Error code is stored in %ah. 1422 * Return code -1 means bios call was unsupported 1423 * in the APM BIOS version. 1424 */ 1425 if (ret == -1) { 1426 error = EINVAL; 1427 } 1428 } else { 1429 /* 1430 * Return code 0 means bios call was successful. 1431 * We need only %al and can discard %ah. 1432 */ 1433 sc->bios.r.eax &= 0xff; 1434 } 1435 args->eax = sc->bios.r.eax; 1436 args->ebx = sc->bios.r.ebx; 1437 args->ecx = sc->bios.r.ecx; 1438 args->edx = sc->bios.r.edx; 1439 args->esi = sc->bios.r.esi; 1440 args->edi = sc->bios.r.edi; 1441 break; 1442 default: 1443 error = EINVAL; 1444 break; 1445 } 1446 1447 /* for /dev/apmctl */ 1448 if (dev2unit(dev) == APMDEV_CTL) { 1449 struct apm_event_info *evp; 1450 int i; 1451 1452 error = 0; 1453 switch (cmd) { 1454 case APMIO_NEXTEVENT: 1455 if (!sc->event_count) { 1456 error = EAGAIN; 1457 } else { 1458 evp = (struct apm_event_info *)addr; 1459 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1460 i %= APM_NEVENTS; 1461 *evp = sc->event_list[i]; 1462 sc->event_count--; 1463 } 1464 break; 1465 case APMIO_REJECTLASTREQ: 1466 if (apm_lastreq_rejected()) { 1467 error = EINVAL; 1468 } 1469 break; 1470 default: 1471 error = EINVAL; 1472 break; 1473 } 1474 } 1475 1476 return error; 1477 } 1478 1479 static int 1480 apmwrite(struct cdev *dev, struct uio *uio, int ioflag) 1481 { 1482 struct apm_softc *sc = &apm_softc; 1483 u_int event_type; 1484 int error; 1485 u_char enabled; 1486 1487 if (dev2unit(dev) != APMDEV_CTL) 1488 return(ENODEV); 1489 if (uio->uio_resid != sizeof(u_int)) 1490 return(E2BIG); 1491 1492 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1493 return(error); 1494 1495 if (event_type < 0 || event_type >= APM_NPMEV) 1496 return(EINVAL); 1497 1498 if (sc->event_filter[event_type] == 0) { 1499 enabled = 1; 1500 } else { 1501 enabled = 0; 1502 } 1503 sc->event_filter[event_type] = enabled; 1504 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1505 1506 return uio->uio_resid; 1507 } 1508 1509 static int 1510 apmpoll(struct cdev *dev, int events, struct thread *td) 1511 { 1512 struct apm_softc *sc = &apm_softc; 1513 int revents = 0; 1514 1515 if (events & (POLLIN | POLLRDNORM)) { 1516 if (sc->event_count) { 1517 revents |= events & (POLLIN | POLLRDNORM); 1518 } else { 1519 selrecord(td, &sc->sc_rsel); 1520 } 1521 } 1522 1523 return (revents); 1524 } 1525 1526 static device_method_t apm_methods[] = { 1527 /* Device interface */ 1528 DEVMETHOD(device_identify, apm_identify), 1529 DEVMETHOD(device_probe, apm_probe), 1530 DEVMETHOD(device_attach, apm_attach), 1531 1532 { 0, 0 } 1533 }; 1534 1535 static driver_t apm_driver = { 1536 "apm", 1537 apm_methods, 1538 1, /* no softc (XXX) */ 1539 }; 1540 1541 static devclass_t apm_devclass; 1542 1543 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0); 1544 MODULE_VERSION(apm, 1); 1545 1546 static int 1547 apm_pm_func(u_long cmd, void *arg, ...) 1548 { 1549 int state, apm_state; 1550 int error; 1551 va_list ap; 1552 1553 error = 0; 1554 switch (cmd) { 1555 case POWER_CMD_SUSPEND: 1556 va_start(ap, arg); 1557 state = va_arg(ap, int); 1558 va_end(ap); 1559 1560 switch (state) { 1561 case POWER_SLEEP_STATE_STANDBY: 1562 apm_state = PMST_STANDBY; 1563 break; 1564 case POWER_SLEEP_STATE_SUSPEND: 1565 case POWER_SLEEP_STATE_HIBERNATE: 1566 apm_state = PMST_SUSPEND; 1567 break; 1568 default: 1569 error = EINVAL; 1570 goto out; 1571 } 1572 1573 apm_suspend(apm_state); 1574 break; 1575 1576 default: 1577 error = EINVAL; 1578 goto out; 1579 } 1580 1581 out: 1582 return (error); 1583 } 1584 1585 static void 1586 apm_pm_register(void *arg) 1587 { 1588 1589 if (!resource_disabled("apm", 0)) 1590 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL); 1591 } 1592 1593 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);
Cache object: 3510f155dabea7255d55665700253a40
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