Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/pc98/apm/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 * $FreeBSD$ 19 */ 20 21 #include <sys/param.h> 22 #include <sys/systm.h> 23 #include <sys/eventhandler.h> 24 #include <sys/conf.h> 25 #include <sys/kernel.h> 26 #include <sys/time.h> 27 #include <sys/reboot.h> 28 #include <sys/bus.h> 29 #include <sys/select.h> 30 #include <sys/poll.h> 31 #include <sys/fcntl.h> 32 #include <sys/uio.h> 33 #include <sys/signalvar.h> 34 #include <sys/sysctl.h> 35 #include <sys/power.h> 36 #include <machine/apm_bios.h> 37 #include <machine/segments.h> 38 #include <machine/clock.h> 39 #include <machine/stdarg.h> 40 #include <vm/vm.h> 41 #include <vm/vm_param.h> 42 #include <vm/pmap.h> 43 #include <sys/syslog.h> 44 45 #include <machine/pc/bios.h> 46 #include <machine/vm86.h> 47 #ifdef PC98 48 #include <machine/bus.h> 49 #include <machine/resource.h> 50 #include <sys/rman.h> 51 #endif 52 53 #include <pc98/apm/apm.h> 54 55 /* Used by the apm_saver screen saver module */ 56 int apm_display __P((int newstate)); 57 struct apm_softc apm_softc; 58 59 static void apm_resume __P((void)); 60 static int apm_bioscall(void); 61 static int apm_check_function_supported __P((u_int version, u_int func)); 62 63 static int apm_pm_func __P((u_long, void*, ...)); 64 65 static u_long apm_version; 66 67 int apm_evindex; 68 69 #define SCFLAG_ONORMAL 0x0000001 70 #define SCFLAG_OCTL 0x0000002 71 #define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL) 72 73 #define APMDEV(dev) (minor(dev)&0x0f) 74 #define APMDEV_NORMAL 0 75 #define APMDEV_CTL 8 76 77 #ifdef PC98 78 extern int bios32_apm98 __P((struct bios_regs *, u_int, u_short)); 79 80 /* PC98's SMM definition */ 81 #define APM_NECSMM_PORT 0x6b8e 82 #define APM_NECSMM_PORTSZ 1 83 #define APM_NECSMM_EN 0x10 84 static __inline void apm_enable_smm __P((struct apm_softc *)); 85 static __inline void apm_disable_smm __P((struct apm_softc *)); 86 int apm_necsmm_addr; 87 u_int32_t apm_necsmm_mask; 88 #endif 89 90 static struct apmhook *hook[NAPM_HOOK]; /* XXX */ 91 92 #define is_enabled(foo) ((foo) ? "enabled" : "disabled") 93 94 /* Map version number to integer (keeps ordering of version numbers) */ 95 #define INTVERSION(major, minor) ((major)*100 + (minor)) 96 97 static struct callout_handle apm_timeout_ch = 98 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch); 99 100 static timeout_t apm_timeout; 101 static d_open_t apmopen; 102 static d_close_t apmclose; 103 static d_write_t apmwrite; 104 static d_ioctl_t apmioctl; 105 static d_poll_t apmpoll; 106 107 #define CDEV_MAJOR 39 108 static struct cdevsw apm_cdevsw = { 109 /* open */ apmopen, 110 /* close */ apmclose, 111 /* read */ noread, 112 /* write */ apmwrite, 113 /* ioctl */ apmioctl, 114 /* poll */ apmpoll, 115 /* mmap */ nommap, 116 /* strategy */ nostrategy, 117 /* name */ "apm", 118 /* maj */ CDEV_MAJOR, 119 /* dump */ nodump, 120 /* psize */ nopsize, 121 /* flags */ 0, 122 /* bmaj */ -1 123 }; 124 125 static int apm_suspend_delay = 1; 126 static int apm_standby_delay = 1; 127 static int apm_debug = 0; 128 129 #define APM_DPRINT(args...) do { \ 130 if (apm_debug) { \ 131 printf(args); \ 132 } \ 133 } while (0) 134 135 SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, ""); 136 SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, ""); 137 SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, ""); 138 139 #ifdef PC98 140 static __inline void 141 apm_enable_smm(sc) 142 struct apm_softc *sc; 143 { 144 bus_space_tag_t iot = sc->sc_iot; 145 bus_space_handle_t ioh = sc->sc_ioh; 146 if (apm_necsmm_addr != 0) 147 bus_space_write_1(iot, ioh, 0, 148 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask)); 149 } 150 151 static __inline void 152 apm_disable_smm(sc) 153 struct apm_softc *sc; 154 { 155 bus_space_tag_t iot = sc->sc_iot; 156 bus_space_handle_t ioh = sc->sc_ioh; 157 if (apm_necsmm_addr != 0) 158 bus_space_write_1(iot, ioh, 0, 159 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask)); 160 } 161 #endif 162 163 /* 164 * return 0 if the function successfull, 165 * return 1 if the function unsuccessfull, 166 * return -1 if the function unsupported. 167 */ 168 static int 169 apm_bioscall(void) 170 { 171 struct apm_softc *sc = &apm_softc; 172 int errno = 0; 173 u_int apm_func = sc->bios.r.eax & 0xff; 174 175 if (!apm_check_function_supported(sc->intversion, apm_func)) { 176 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n", 177 apm_func, sc->majorversion, sc->minorversion); 178 return (-1); 179 } 180 181 sc->bios_busy = 1; 182 #ifdef PC98 183 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG); 184 if (bios32_apm98(&sc->bios.r, sc->bios.entry, 185 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0) 186 return 1; 187 #else 188 if (sc->connectmode == APM_PROT32CONNECT) { 189 set_bios_selectors(&sc->bios.seg, 190 BIOSCODE_FLAG | BIOSDATA_FLAG); 191 errno = bios32(&sc->bios.r, 192 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL)); 193 } else { 194 errno = bios16(&sc->bios, NULL); 195 } 196 #endif 197 sc->bios_busy = 0; 198 return (errno); 199 } 200 201 /* check whether APM function is supported (1) or not (0). */ 202 static int 203 apm_check_function_supported(u_int version, u_int func) 204 { 205 /* except driver version */ 206 if (func == APM_DRVVERSION) { 207 return (1); 208 } 209 #ifdef PC98 210 if (func == APM_GETPWSTATUS) { 211 return (1); 212 } 213 #endif 214 215 switch (version) { 216 case INTVERSION(1, 0): 217 if (func > APM_GETPMEVENT) { 218 return (0); /* not supported */ 219 } 220 break; 221 case INTVERSION(1, 1): 222 if (func > APM_ENGAGEDISENGAGEPM && 223 func < APM_OEMFUNC) { 224 return (0); /* not supported */ 225 } 226 break; 227 case INTVERSION(1, 2): 228 break; 229 } 230 231 return (1); /* supported */ 232 } 233 234 /* enable/disable power management */ 235 static int 236 apm_enable_disable_pm(int enable) 237 { 238 struct apm_softc *sc = &apm_softc; 239 240 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM; 241 242 if (sc->intversion >= INTVERSION(1, 1)) 243 sc->bios.r.ebx = PMDV_ALLDEV; 244 else 245 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */ 246 sc->bios.r.ecx = enable; 247 sc->bios.r.edx = 0; 248 return (apm_bioscall()); 249 } 250 251 /* register driver version (APM 1.1 or later) */ 252 static int 253 apm_driver_version(int version) 254 { 255 struct apm_softc *sc = &apm_softc; 256 257 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION; 258 sc->bios.r.ebx = 0x0; 259 sc->bios.r.ecx = version; 260 sc->bios.r.edx = 0; 261 262 if (apm_bioscall() == 0 && sc->bios.r.eax == version) 263 return (0); 264 265 /* Some old BIOSes don't return the connection version in %ax. */ 266 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION)) 267 return (0); 268 269 return (1); 270 } 271 272 /* engage/disengage power management (APM 1.1 or later) */ 273 static int 274 apm_engage_disengage_pm(int engage) 275 { 276 struct apm_softc *sc = &apm_softc; 277 278 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM; 279 sc->bios.r.ebx = PMDV_ALLDEV; 280 sc->bios.r.ecx = engage; 281 sc->bios.r.edx = 0; 282 return (apm_bioscall()); 283 } 284 285 /* get PM event */ 286 static u_int 287 apm_getevent(void) 288 { 289 struct apm_softc *sc = &apm_softc; 290 291 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT; 292 293 sc->bios.r.ebx = 0; 294 sc->bios.r.ecx = 0; 295 sc->bios.r.edx = 0; 296 if (apm_bioscall()) 297 return (PMEV_NOEVENT); 298 return (sc->bios.r.ebx & 0xffff); 299 } 300 301 /* suspend entire system */ 302 static int 303 apm_suspend_system(int state) 304 { 305 struct apm_softc *sc = &apm_softc; 306 307 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 308 sc->bios.r.ebx = PMDV_ALLDEV; 309 sc->bios.r.ecx = state; 310 sc->bios.r.edx = 0; 311 312 #ifdef PC98 313 apm_disable_smm(sc); 314 #endif 315 if (apm_bioscall()) { 316 printf("Entire system suspend failure: errcode = %d\n", 317 0xff & (sc->bios.r.eax >> 8)); 318 return 1; 319 } 320 #ifdef PC98 321 apm_enable_smm(sc); 322 #endif 323 return 0; 324 } 325 326 /* Display control */ 327 /* 328 * Experimental implementation: My laptop machine can't handle this function 329 * If your laptop can control the display via APM, please inform me. 330 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org> 331 */ 332 int 333 apm_display(int newstate) 334 { 335 struct apm_softc *sc = &apm_softc; 336 337 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 338 sc->bios.r.ebx = PMDV_DISP0; 339 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 340 sc->bios.r.edx = 0; 341 if (apm_bioscall() == 0) { 342 return 0; 343 } 344 345 /* If failed, then try to blank all display devices instead. */ 346 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 347 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */ 348 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; 349 sc->bios.r.edx = 0; 350 if (apm_bioscall() == 0) { 351 return 0; 352 } 353 printf("Display off failure: errcode = %d\n", 354 0xff & (sc->bios.r.eax >> 8)); 355 return 1; 356 } 357 358 /* 359 * Turn off the entire system. 360 */ 361 static void 362 apm_power_off(void *junk, int howto) 363 { 364 struct apm_softc *sc = &apm_softc; 365 366 /* Not halting powering off, or not active */ 367 if (!(howto & RB_POWEROFF) || !apm_softc.active) 368 return; 369 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 370 sc->bios.r.ebx = PMDV_ALLDEV; 371 sc->bios.r.ecx = PMST_OFF; 372 sc->bios.r.edx = 0; 373 (void) apm_bioscall(); 374 } 375 376 /* APM Battery low handler */ 377 static void 378 apm_battery_low(void) 379 { 380 printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); 381 } 382 383 /* APM hook manager */ 384 static struct apmhook * 385 apm_add_hook(struct apmhook **list, struct apmhook *ah) 386 { 387 int s; 388 struct apmhook *p, *prev; 389 390 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name); 391 392 s = splhigh(); 393 if (ah == NULL) 394 panic("illegal apm_hook!"); 395 prev = NULL; 396 for (p = *list; p != NULL; prev = p, p = p->ah_next) 397 if (p->ah_order > ah->ah_order) 398 break; 399 400 if (prev == NULL) { 401 ah->ah_next = *list; 402 *list = ah; 403 } else { 404 ah->ah_next = prev->ah_next; 405 prev->ah_next = ah; 406 } 407 splx(s); 408 return ah; 409 } 410 411 static void 412 apm_del_hook(struct apmhook **list, struct apmhook *ah) 413 { 414 int s; 415 struct apmhook *p, *prev; 416 417 s = splhigh(); 418 prev = NULL; 419 for (p = *list; p != NULL; prev = p, p = p->ah_next) 420 if (p == ah) 421 goto deleteit; 422 panic("Tried to delete unregistered apm_hook."); 423 goto nosuchnode; 424 deleteit: 425 if (prev != NULL) 426 prev->ah_next = p->ah_next; 427 else 428 *list = p->ah_next; 429 nosuchnode: 430 splx(s); 431 } 432 433 434 /* APM driver calls some functions automatically */ 435 static void 436 apm_execute_hook(struct apmhook *list) 437 { 438 struct apmhook *p; 439 440 for (p = list; p != NULL; p = p->ah_next) { 441 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name); 442 if ((*(p->ah_fun))(p->ah_arg)) 443 printf("Warning: APM hook \"%s\" failed", p->ah_name); 444 } 445 } 446 447 448 /* establish an apm hook */ 449 struct apmhook * 450 apm_hook_establish(int apmh, struct apmhook *ah) 451 { 452 if (apmh < 0 || apmh >= NAPM_HOOK) 453 return NULL; 454 455 return apm_add_hook(&hook[apmh], ah); 456 } 457 458 /* disestablish an apm hook */ 459 void 460 apm_hook_disestablish(int apmh, struct apmhook *ah) 461 { 462 if (apmh < 0 || apmh >= NAPM_HOOK) 463 return; 464 465 apm_del_hook(&hook[apmh], ah); 466 } 467 468 static int apm_record_event __P((struct apm_softc *, u_int)); 469 static void apm_processevent(void); 470 471 static u_int apm_op_inprog = 0; 472 473 static void 474 apm_do_suspend(void) 475 { 476 struct apm_softc *sc = &apm_softc; 477 int error; 478 479 if (!sc) 480 return; 481 482 apm_op_inprog = 0; 483 sc->suspends = sc->suspend_countdown = 0; 484 485 if (sc->initialized) { 486 error = DEVICE_SUSPEND(root_bus); 487 if (error) { 488 DEVICE_RESUME(root_bus); 489 } else { 490 apm_execute_hook(hook[APM_HOOK_SUSPEND]); 491 if (apm_suspend_system(PMST_SUSPEND) == 0) { 492 sc->suspending = 1; 493 apm_processevent(); 494 } else { 495 /* Failure, 'resume' the system again */ 496 apm_execute_hook(hook[APM_HOOK_RESUME]); 497 DEVICE_RESUME(root_bus); 498 } 499 } 500 } 501 } 502 503 static void 504 apm_do_standby(void) 505 { 506 struct apm_softc *sc = &apm_softc; 507 508 if (!sc) 509 return; 510 511 apm_op_inprog = 0; 512 sc->standbys = sc->standby_countdown = 0; 513 514 if (sc->initialized) { 515 /* 516 * As far as standby, we don't need to execute 517 * all of suspend hooks. 518 */ 519 if (apm_suspend_system(PMST_STANDBY) == 0) 520 apm_processevent(); 521 } 522 } 523 524 static void 525 apm_lastreq_notify(void) 526 { 527 struct apm_softc *sc = &apm_softc; 528 529 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 530 sc->bios.r.ebx = PMDV_ALLDEV; 531 sc->bios.r.ecx = PMST_LASTREQNOTIFY; 532 sc->bios.r.edx = 0; 533 apm_bioscall(); 534 } 535 536 static int 537 apm_lastreq_rejected(void) 538 { 539 struct apm_softc *sc = &apm_softc; 540 541 if (apm_op_inprog == 0) { 542 return 1; /* no operation in progress */ 543 } 544 545 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; 546 sc->bios.r.ebx = PMDV_ALLDEV; 547 sc->bios.r.ecx = PMST_LASTREQREJECT; 548 sc->bios.r.edx = 0; 549 550 if (apm_bioscall()) { 551 APM_DPRINT("apm_lastreq_rejected: failed\n"); 552 return 1; 553 } 554 apm_op_inprog = 0; 555 return 0; 556 } 557 558 /* 559 * Public interface to the suspend/resume: 560 * 561 * Execute suspend and resume hook before and after sleep, respectively. 562 * 563 */ 564 565 void 566 apm_suspend(int state) 567 { 568 struct apm_softc *sc = &apm_softc; 569 570 if (!sc->initialized) 571 return; 572 573 switch (state) { 574 case PMST_SUSPEND: 575 if (sc->suspends) 576 return; 577 sc->suspends++; 578 sc->suspend_countdown = apm_suspend_delay; 579 break; 580 case PMST_STANDBY: 581 if (sc->standbys) 582 return; 583 sc->standbys++; 584 sc->standby_countdown = apm_standby_delay; 585 break; 586 default: 587 printf("apm_suspend: Unknown Suspend state 0x%x\n", state); 588 return; 589 } 590 591 apm_op_inprog++; 592 apm_lastreq_notify(); 593 } 594 595 void 596 apm_resume(void) 597 { 598 struct apm_softc *sc = &apm_softc; 599 600 if (!sc) 601 return; 602 603 if (sc->suspending == 0) 604 return; 605 606 sc->suspending = 0; 607 if (sc->initialized) { 608 apm_execute_hook(hook[APM_HOOK_RESUME]); 609 DEVICE_RESUME(root_bus); 610 } 611 } 612 613 614 /* get power status per battery */ 615 static int 616 apm_get_pwstatus(apm_pwstatus_t app) 617 { 618 struct apm_softc *sc = &apm_softc; 619 620 if (app->ap_device != PMDV_ALLDEV && 621 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL)) 622 return 1; 623 624 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS; 625 sc->bios.r.ebx = app->ap_device; 626 sc->bios.r.ecx = 0; 627 sc->bios.r.edx = 0xffff; /* default to unknown battery time */ 628 629 if (apm_bioscall()) 630 return 1; 631 632 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff; 633 app->ap_batt_stat = sc->bios.r.ebx & 0xff; 634 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff; 635 app->ap_batt_life = sc->bios.r.ecx & 0xff; 636 sc->bios.r.edx &= 0xffff; 637 if (sc->bios.r.edx == 0xffff) /* Time is unknown */ 638 app->ap_batt_time = -1; 639 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */ 640 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60; 641 else /* Time is in seconds */ 642 app->ap_batt_time = sc->bios.r.edx; 643 644 return 0; 645 } 646 647 648 /* get APM information */ 649 static int 650 apm_get_info(apm_info_t aip) 651 { 652 struct apm_softc *sc = &apm_softc; 653 struct apm_pwstatus aps; 654 655 bzero(&aps, sizeof(aps)); 656 aps.ap_device = PMDV_ALLDEV; 657 if (apm_get_pwstatus(&aps)) 658 return 1; 659 660 aip->ai_infoversion = 1; 661 aip->ai_acline = aps.ap_acline; 662 aip->ai_batt_stat = aps.ap_batt_stat; 663 aip->ai_batt_life = aps.ap_batt_life; 664 aip->ai_batt_time = aps.ap_batt_time; 665 aip->ai_major = (u_int)sc->majorversion; 666 aip->ai_minor = (u_int)sc->minorversion; 667 aip->ai_status = (u_int)sc->active; 668 669 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; 670 sc->bios.r.ebx = 0; 671 sc->bios.r.ecx = 0; 672 sc->bios.r.edx = 0; 673 if (apm_bioscall()) { 674 aip->ai_batteries = -1; /* Unknown */ 675 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ 676 } else { 677 aip->ai_batteries = sc->bios.r.ebx & 0xff; 678 aip->ai_capabilities = sc->bios.r.ecx & 0xf; 679 } 680 681 bzero(aip->ai_spare, sizeof aip->ai_spare); 682 683 return 0; 684 } 685 686 687 /* inform APM BIOS that CPU is idle */ 688 void 689 apm_cpu_idle(void) 690 { 691 struct apm_softc *sc = &apm_softc; 692 693 if (sc->active) { 694 695 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE; 696 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 697 (void) apm_bioscall(); 698 } 699 /* 700 * Some APM implementation halts CPU in BIOS, whenever 701 * "CPU-idle" function are invoked, but swtch() of 702 * FreeBSD halts CPU, therefore, CPU is halted twice 703 * in the sched loop. It makes the interrupt latency 704 * terribly long and be able to cause a serious problem 705 * in interrupt processing. We prevent it by removing 706 * "hlt" operation from swtch() and managed it under 707 * APM driver. 708 */ 709 if (!sc->active || sc->always_halt_cpu) 710 __asm("hlt"); /* wait for interrupt */ 711 } 712 713 /* inform APM BIOS that CPU is busy */ 714 void 715 apm_cpu_busy(void) 716 { 717 struct apm_softc *sc = &apm_softc; 718 719 /* 720 * The APM specification says this is only necessary if your BIOS 721 * slows down the processor in the idle task, otherwise it's not 722 * necessary. 723 */ 724 if (sc->slow_idle_cpu && sc->active) { 725 726 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY; 727 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; 728 apm_bioscall(); 729 } 730 } 731 732 733 /* 734 * APM timeout routine: 735 * 736 * This routine is automatically called by timer once per second. 737 */ 738 739 static void 740 apm_timeout(void *dummy) 741 { 742 struct apm_softc *sc = &apm_softc; 743 744 if (apm_op_inprog) 745 apm_lastreq_notify(); 746 747 if (sc->standbys && sc->standby_countdown-- <= 0) 748 apm_do_standby(); 749 750 if (sc->suspends && sc->suspend_countdown-- <= 0) 751 apm_do_suspend(); 752 753 if (!sc->bios_busy) 754 apm_processevent(); 755 756 if (sc->active == 1) 757 /* Run slightly more oftan than 1 Hz */ 758 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1); 759 } 760 761 /* enable APM BIOS */ 762 static void 763 apm_event_enable(void) 764 { 765 struct apm_softc *sc = &apm_softc; 766 767 APM_DPRINT("called apm_event_enable()\n"); 768 if (sc->initialized) { 769 sc->active = 1; 770 apm_timeout(sc); 771 } 772 } 773 774 /* disable APM BIOS */ 775 static void 776 apm_event_disable(void) 777 { 778 struct apm_softc *sc = &apm_softc; 779 780 APM_DPRINT("called apm_event_disable()\n"); 781 if (sc->initialized) { 782 untimeout(apm_timeout, NULL, apm_timeout_ch); 783 sc->active = 0; 784 } 785 } 786 787 /* halt CPU in scheduling loop */ 788 static void 789 apm_halt_cpu(void) 790 { 791 struct apm_softc *sc = &apm_softc; 792 793 if (sc->initialized) 794 sc->always_halt_cpu = 1; 795 } 796 797 /* don't halt CPU in scheduling loop */ 798 static void 799 apm_not_halt_cpu(void) 800 { 801 struct apm_softc *sc = &apm_softc; 802 803 if (sc->initialized) 804 sc->always_halt_cpu = 0; 805 } 806 807 /* device driver definitions */ 808 809 /* 810 * Module event 811 */ 812 813 static int 814 apm_modevent(struct module *mod, int event, void *junk) 815 { 816 817 switch (event) { 818 case MOD_LOAD: 819 if (!cold) 820 return (EPERM); 821 break; 822 case MOD_UNLOAD: 823 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM) 824 return (EBUSY); 825 break; 826 default: 827 break; 828 } 829 830 return (0); 831 } 832 833 /* 834 * Create "connection point" 835 */ 836 static void 837 apm_identify(driver_t *driver, device_t parent) 838 { 839 device_t child; 840 841 if (!cold) { 842 printf("Don't load this driver from userland!!\n"); 843 return; 844 } 845 846 child = BUS_ADD_CHILD(parent, 0, "apm", 0); 847 if (child == NULL) 848 panic("apm_identify"); 849 } 850 851 /* 852 * probe for APM BIOS 853 */ 854 static int 855 apm_probe(device_t dev) 856 { 857 #define APM_KERNBASE KERNBASE 858 struct vm86frame vmf; 859 struct apm_softc *sc = &apm_softc; 860 int disabled, flags; 861 #ifdef PC98 862 int rid; 863 #endif 864 865 device_set_desc(dev, "APM BIOS"); 866 867 if (resource_int_value("apm", 0, "disabled", &disabled) != 0) 868 disabled = 0; 869 if (disabled) 870 return ENXIO; 871 872 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 vmf.vmf_ah = APM_BIOS; 927 vmf.vmf_al = APM_PROT32CONNECT; 928 vmf.vmf_bx = 0; 929 if (vm86_intcall(APM_INT, &vmf)) { 930 printf("apm: 32-bit connection error.\n"); 931 return (ENXIO); 932 } 933 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 934 sc->bios.seg.code32.limit = 0xffff; 935 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 936 sc->bios.seg.code16.limit = 0xffff; 937 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 938 sc->bios.seg.data.limit = 0xffff; 939 sc->bios.entry = vmf.vmf_ebx; 940 sc->connectmode = APM_PROT32CONNECT; 941 #else 942 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { 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 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 951 sc->bios.seg.code32.limit = 0xffff; 952 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 953 sc->bios.seg.code16.limit = 0xffff; 954 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; 955 sc->bios.seg.data.limit = 0xffff; 956 sc->bios.entry = vmf.vmf_ebx; 957 sc->connectmode = APM_PROT32CONNECT; 958 } else { 959 /* use 16-bit connection */ 960 vmf.vmf_ah = APM_BIOS; 961 vmf.vmf_al = APM_PROT16CONNECT; 962 vmf.vmf_bx = 0; 963 if (vm86_intcall(APM_INT, &vmf)) { 964 printf("apm: 16-bit connection error.\n"); 965 return (ENXIO); 966 } 967 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; 968 sc->bios.seg.code16.limit = 0xffff; 969 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; 970 sc->bios.seg.data.limit = 0xffff; 971 sc->bios.entry = vmf.vmf_bx; 972 sc->connectmode = APM_PROT16CONNECT; 973 } 974 #endif 975 return(0); 976 } 977 978 979 /* 980 * return 0 if the user will notice and handle the event, 981 * return 1 if the kernel driver should do so. 982 */ 983 static int 984 apm_record_event(struct apm_softc *sc, u_int event_type) 985 { 986 struct apm_event_info *evp; 987 988 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 989 return 1; /* no user waiting */ 990 if (sc->event_count == APM_NEVENTS) 991 return 1; /* overflow */ 992 if (sc->event_filter[event_type] == 0) 993 return 1; /* not registered */ 994 evp = &sc->event_list[sc->event_ptr]; 995 sc->event_count++; 996 sc->event_ptr++; 997 sc->event_ptr %= APM_NEVENTS; 998 evp->type = event_type; 999 evp->index = ++apm_evindex; 1000 selwakeup(&sc->sc_rsel); 1001 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ 1002 } 1003 1004 /* Power profile */ 1005 static void 1006 apm_power_profile(struct apm_softc *sc) 1007 { 1008 int state; 1009 struct apm_info info; 1010 static int apm_acline = 0; 1011 1012 if (apm_get_info(&info)) 1013 return; 1014 1015 if (apm_acline != info.ai_acline) { 1016 apm_acline = info.ai_acline; 1017 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY; 1018 power_profile_set_state(state); 1019 } 1020 } 1021 1022 /* Process APM event */ 1023 static void 1024 apm_processevent(void) 1025 { 1026 int apm_event; 1027 struct apm_softc *sc = &apm_softc; 1028 1029 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ 1030 APM_DPRINT("Received APM Event: " #symbol "\n"); 1031 1032 do { 1033 apm_event = apm_getevent(); 1034 switch (apm_event) { 1035 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); 1036 if (apm_op_inprog == 0) { 1037 apm_op_inprog++; 1038 if (apm_record_event(sc, apm_event)) { 1039 apm_suspend(PMST_STANDBY); 1040 } 1041 } 1042 break; 1043 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); 1044 if (apm_op_inprog == 0) { 1045 apm_op_inprog++; 1046 if (apm_record_event(sc, apm_event)) { 1047 apm_suspend(PMST_STANDBY); 1048 } 1049 } 1050 break; 1051 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); 1052 apm_lastreq_notify(); 1053 if (apm_op_inprog == 0) { 1054 apm_op_inprog++; 1055 if (apm_record_event(sc, apm_event)) { 1056 apm_do_suspend(); 1057 } 1058 } 1059 return; /* XXX skip the rest */ 1060 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); 1061 apm_lastreq_notify(); 1062 if (apm_op_inprog == 0) { 1063 apm_op_inprog++; 1064 if (apm_record_event(sc, apm_event)) { 1065 apm_do_suspend(); 1066 } 1067 } 1068 return; /* XXX skip the rest */ 1069 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); 1070 apm_do_suspend(); 1071 break; 1072 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); 1073 apm_record_event(sc, apm_event); 1074 apm_resume(); 1075 break; 1076 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); 1077 apm_record_event(sc, apm_event); 1078 apm_resume(); 1079 break; 1080 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); 1081 apm_record_event(sc, apm_event); 1082 break; 1083 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); 1084 if (apm_record_event(sc, apm_event)) { 1085 apm_battery_low(); 1086 apm_suspend(PMST_SUSPEND); 1087 } 1088 break; 1089 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); 1090 apm_record_event(sc, apm_event); 1091 apm_power_profile(sc); 1092 break; 1093 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); 1094 apm_record_event(sc, apm_event); 1095 inittodr(0); /* adjust time to RTC */ 1096 break; 1097 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); 1098 apm_record_event(sc, apm_event); 1099 apm_power_profile(sc); 1100 break; 1101 case PMEV_NOEVENT: 1102 break; 1103 default: 1104 printf("Unknown Original APM Event 0x%x\n", apm_event); 1105 break; 1106 } 1107 } while (apm_event != PMEV_NOEVENT); 1108 #ifdef PC98 1109 apm_disable_smm(sc); 1110 #endif 1111 } 1112 1113 /* 1114 * Attach APM: 1115 * 1116 * Initialize APM driver 1117 */ 1118 1119 static int 1120 apm_attach(device_t dev) 1121 { 1122 struct apm_softc *sc = &apm_softc; 1123 int flags; 1124 int drv_version; 1125 #ifdef PC98 1126 int rid; 1127 #endif 1128 1129 if (resource_int_value("apm", 0, "flags", &flags) != 0) 1130 flags = 0; 1131 1132 if (flags & 0x20) 1133 statclock_disable = 1; 1134 1135 sc->initialized = 0; 1136 1137 /* Must be externally enabled */ 1138 sc->active = 0; 1139 1140 /* Always call HLT in idle loop */ 1141 sc->always_halt_cpu = 1; 1142 1143 getenv_int("debug.apm_debug", &apm_debug); 1144 1145 /* print bootstrap messages */ 1146 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version); 1147 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n", 1148 sc->bios.seg.code16.base, sc->bios.seg.data.base); 1149 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", 1150 sc->bios.entry, is_enabled(sc->slow_idle_cpu), 1151 is_enabled(!sc->disabled)); 1152 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n", 1153 sc->bios.seg.code16.limit, sc->bios.seg.data.limit); 1154 1155 #ifdef PC98 1156 rid = 0; 1157 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 1158 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE); 1159 if (sc->sc_res == NULL) 1160 panic("%s: counldn't map I/O ports", device_get_name(dev)); 1161 sc->sc_iot = rman_get_bustag(sc->sc_res); 1162 sc->sc_ioh = rman_get_bushandle(sc->sc_res); 1163 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110) 1164 apm_necsmm_addr = APM_NECSMM_PORT; 1165 else 1166 apm_necsmm_addr = 0; 1167 apm_necsmm_mask = ~APM_NECSMM_EN; 1168 #endif /* PC98 */ 1169 /* 1170 * In one test, apm bios version was 1.02; an attempt to register 1171 * a 1.04 driver resulted in a 1.00 connection! Registering a 1172 * 1.02 driver resulted in a 1.02 connection. 1173 */ 1174 drv_version = apm_version > 0x102 ? 0x102 : apm_version; 1175 for (; drv_version > 0x100; drv_version--) 1176 if (apm_driver_version(drv_version) == 0) 1177 break; 1178 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + 1179 ((drv_version & 0x000f) >> 0); 1180 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + 1181 ((apm_version & 0x0f00) >> 8); 1182 1183 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); 1184 1185 if (sc->intversion >= INTVERSION(1, 1)) 1186 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); 1187 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n", 1188 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), 1189 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), 1190 sc->majorversion, sc->minorversion); 1191 1192 1193 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); 1194 /* enable power management */ 1195 if (sc->disabled) { 1196 if (apm_enable_disable_pm(1)) { 1197 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n", 1198 (sc->bios.r.eax >> 8) & 0xff); 1199 } 1200 } 1201 1202 /* engage power managment (APM 1.1 or later) */ 1203 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { 1204 if (apm_engage_disengage_pm(1)) { 1205 APM_DPRINT("apm: *Warning* engage function failed err=[%x]", 1206 (sc->bios.r.eax >> 8) & 0xff); 1207 APM_DPRINT(" (Docked or using external power?).\n"); 1208 } 1209 } 1210 1211 /* Power the system off using APM */ 1212 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, 1213 SHUTDOWN_PRI_LAST); 1214 1215 /* Register APM again to pass the correct argument of pm_func. */ 1216 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc); 1217 1218 sc->initialized = 1; 1219 sc->suspending = 0; 1220 1221 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm"); 1222 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl"); 1223 return 0; 1224 } 1225 1226 static int 1227 apmopen(dev_t dev, int flag, int fmt, struct proc *p) 1228 { 1229 struct apm_softc *sc = &apm_softc; 1230 int ctl = APMDEV(dev); 1231 1232 if (!sc->initialized) 1233 return (ENXIO); 1234 1235 switch (ctl) { 1236 case APMDEV_CTL: 1237 if (!(flag & FWRITE)) 1238 return EINVAL; 1239 if (sc->sc_flags & SCFLAG_OCTL) 1240 return EBUSY; 1241 sc->sc_flags |= SCFLAG_OCTL; 1242 bzero(sc->event_filter, sizeof sc->event_filter); 1243 break; 1244 case APMDEV_NORMAL: 1245 sc->sc_flags |= SCFLAG_ONORMAL; 1246 break; 1247 default: 1248 return ENXIO; 1249 break; 1250 } 1251 return 0; 1252 } 1253 1254 static int 1255 apmclose(dev_t dev, int flag, int fmt, struct proc *p) 1256 { 1257 struct apm_softc *sc = &apm_softc; 1258 int ctl = APMDEV(dev); 1259 1260 switch (ctl) { 1261 case APMDEV_CTL: 1262 apm_lastreq_rejected(); 1263 sc->sc_flags &= ~SCFLAG_OCTL; 1264 bzero(sc->event_filter, sizeof sc->event_filter); 1265 break; 1266 case APMDEV_NORMAL: 1267 sc->sc_flags &= ~SCFLAG_ONORMAL; 1268 break; 1269 } 1270 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 1271 sc->event_count = 0; 1272 sc->event_ptr = 0; 1273 } 1274 return 0; 1275 } 1276 1277 static int 1278 apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) 1279 { 1280 struct apm_softc *sc = &apm_softc; 1281 struct apm_bios_arg *args; 1282 int error = 0; 1283 int ret; 1284 int newstate; 1285 1286 if (!sc->initialized) 1287 return (ENXIO); 1288 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd); 1289 switch (cmd) { 1290 case APMIO_SUSPEND: 1291 if (!(flag & FWRITE)) 1292 return (EPERM); 1293 if (sc->active) 1294 apm_suspend(PMST_SUSPEND); 1295 else 1296 error = EINVAL; 1297 break; 1298 1299 case APMIO_STANDBY: 1300 if (!(flag & FWRITE)) 1301 return (EPERM); 1302 if (sc->active) 1303 apm_suspend(PMST_STANDBY); 1304 else 1305 error = EINVAL; 1306 break; 1307 1308 case APMIO_GETINFO_OLD: 1309 { 1310 struct apm_info info; 1311 apm_info_old_t aiop; 1312 1313 if (apm_get_info(&info)) 1314 error = ENXIO; 1315 aiop = (apm_info_old_t)addr; 1316 aiop->ai_major = info.ai_major; 1317 aiop->ai_minor = info.ai_minor; 1318 aiop->ai_acline = info.ai_acline; 1319 aiop->ai_batt_stat = info.ai_batt_stat; 1320 aiop->ai_batt_life = info.ai_batt_life; 1321 aiop->ai_status = info.ai_status; 1322 } 1323 break; 1324 case APMIO_GETINFO: 1325 if (apm_get_info((apm_info_t)addr)) 1326 error = ENXIO; 1327 break; 1328 case APMIO_GETPWSTATUS: 1329 if (apm_get_pwstatus((apm_pwstatus_t)addr)) 1330 error = ENXIO; 1331 break; 1332 case APMIO_ENABLE: 1333 if (!(flag & FWRITE)) 1334 return (EPERM); 1335 apm_event_enable(); 1336 break; 1337 case APMIO_DISABLE: 1338 if (!(flag & FWRITE)) 1339 return (EPERM); 1340 apm_event_disable(); 1341 break; 1342 case APMIO_HALTCPU: 1343 if (!(flag & FWRITE)) 1344 return (EPERM); 1345 apm_halt_cpu(); 1346 break; 1347 case APMIO_NOTHALTCPU: 1348 if (!(flag & FWRITE)) 1349 return (EPERM); 1350 apm_not_halt_cpu(); 1351 break; 1352 case APMIO_DISPLAY: 1353 if (!(flag & FWRITE)) 1354 return (EPERM); 1355 newstate = *(int *)addr; 1356 if (apm_display(newstate)) 1357 error = ENXIO; 1358 break; 1359 case APMIO_BIOS: 1360 if (!(flag & FWRITE)) 1361 return (EPERM); 1362 /* XXX compatibility with the old interface */ 1363 args = (struct apm_bios_arg *)addr; 1364 sc->bios.r.eax = args->eax; 1365 sc->bios.r.ebx = args->ebx; 1366 sc->bios.r.ecx = args->ecx; 1367 sc->bios.r.edx = args->edx; 1368 sc->bios.r.esi = args->esi; 1369 sc->bios.r.edi = args->edi; 1370 if ((ret = apm_bioscall())) { 1371 /* 1372 * Return code 1 means bios call was unsuccessful. 1373 * Error code is stored in %ah. 1374 * Return code -1 means bios call was unsupported 1375 * in the APM BIOS version. 1376 */ 1377 if (ret == -1) { 1378 error = EINVAL; 1379 } 1380 } else { 1381 /* 1382 * Return code 0 means bios call was successful. 1383 * We need only %al and can discard %ah. 1384 */ 1385 sc->bios.r.eax &= 0xff; 1386 } 1387 args->eax = sc->bios.r.eax; 1388 args->ebx = sc->bios.r.ebx; 1389 args->ecx = sc->bios.r.ecx; 1390 args->edx = sc->bios.r.edx; 1391 args->esi = sc->bios.r.esi; 1392 args->edi = sc->bios.r.edi; 1393 break; 1394 default: 1395 error = EINVAL; 1396 break; 1397 } 1398 1399 /* for /dev/apmctl */ 1400 if (APMDEV(dev) == APMDEV_CTL) { 1401 struct apm_event_info *evp; 1402 int i; 1403 1404 error = 0; 1405 switch (cmd) { 1406 case APMIO_NEXTEVENT: 1407 if (!sc->event_count) { 1408 error = EAGAIN; 1409 } else { 1410 evp = (struct apm_event_info *)addr; 1411 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 1412 i %= APM_NEVENTS; 1413 *evp = sc->event_list[i]; 1414 sc->event_count--; 1415 } 1416 break; 1417 case APMIO_REJECTLASTREQ: 1418 if (apm_lastreq_rejected()) { 1419 error = EINVAL; 1420 } 1421 break; 1422 default: 1423 error = EINVAL; 1424 break; 1425 } 1426 } 1427 1428 return error; 1429 } 1430 1431 static int 1432 apmwrite(dev_t dev, struct uio *uio, int ioflag) 1433 { 1434 struct apm_softc *sc = &apm_softc; 1435 u_int event_type; 1436 int error; 1437 u_char enabled; 1438 1439 if (APMDEV(dev) != APMDEV_CTL) 1440 return(ENODEV); 1441 if (uio->uio_resid != sizeof(u_int)) 1442 return(E2BIG); 1443 1444 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) 1445 return(error); 1446 1447 if (event_type < 0 || event_type >= APM_NPMEV) 1448 return(EINVAL); 1449 1450 if (sc->event_filter[event_type] == 0) { 1451 enabled = 1; 1452 } else { 1453 enabled = 0; 1454 } 1455 sc->event_filter[event_type] = enabled; 1456 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); 1457 1458 return uio->uio_resid; 1459 } 1460 1461 static int 1462 apmpoll(dev_t dev, int events, struct proc *p) 1463 { 1464 struct apm_softc *sc = &apm_softc; 1465 int revents = 0; 1466 1467 if (events & (POLLIN | POLLRDNORM)) { 1468 if (sc->event_count) { 1469 revents |= events & (POLLIN | POLLRDNORM); 1470 } else { 1471 selrecord(p, &sc->sc_rsel); 1472 } 1473 } 1474 1475 return (revents); 1476 } 1477 1478 static device_method_t apm_methods[] = { 1479 /* Device interface */ 1480 DEVMETHOD(device_identify, apm_identify), 1481 DEVMETHOD(device_probe, apm_probe), 1482 DEVMETHOD(device_attach, apm_attach), 1483 1484 { 0, 0 } 1485 }; 1486 1487 static driver_t apm_driver = { 1488 "apm", 1489 apm_methods, 1490 1, /* no softc (XXX) */ 1491 }; 1492 1493 static devclass_t apm_devclass; 1494 1495 DRIVER_MODULE(apm, nexus, apm_driver, apm_devclass, apm_modevent, 0); 1496 MODULE_VERSION(apm, 1); 1497 1498 static int 1499 apm_pm_func(u_long cmd, void *arg, ...) 1500 { 1501 int state, apm_state; 1502 int error; 1503 va_list ap; 1504 1505 error = 0; 1506 switch (cmd) { 1507 case POWER_CMD_SUSPEND: 1508 va_start(ap, arg); 1509 state = va_arg(ap, int); 1510 va_end(ap); 1511 1512 switch (state) { 1513 case POWER_SLEEP_STATE_STANDBY: 1514 apm_state = PMST_STANDBY; 1515 break; 1516 case POWER_SLEEP_STATE_SUSPEND: 1517 case POWER_SLEEP_STATE_HIBERNATE: 1518 apm_state = PMST_SUSPEND; 1519 break; 1520 default: 1521 error = EINVAL; 1522 goto out; 1523 } 1524 1525 apm_suspend(apm_state); 1526 break; 1527 1528 default: 1529 error = EINVAL; 1530 goto out; 1531 } 1532 1533 out: 1534 return (error); 1535 } 1536 1537 static void 1538 apm_pm_register(void *arg) 1539 { 1540 int disabled = 0; 1541 1542 resource_int_value("apm", 0, "disabled", &disabled); 1543 if (disabled == 0) 1544 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL); 1545 } 1546 1547 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);
Cache object: 2b8f2b79ce603004f8a20c85f2f6b191
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