apmdev.c revision 1.28
1 /* $NetBSD: apmdev.c,v 1.28 2013/11/09 02:44:52 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1997 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by John Kohl and Christopher G. Demetriou. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 /* 32 * from: sys/arch/i386/i386/apm.c,v 1.49 2000/05/08 33 */ 34 35 #include <sys/cdefs.h> 36 __KERNEL_RCSID(0, "$NetBSD: apmdev.c,v 1.28 2013/11/09 02:44:52 christos Exp $"); 37 38 #ifdef _KERNEL_OPT 39 #include "opt_apm.h" 40 #endif 41 42 #if defined(DEBUG) && !defined(APMDEBUG) 43 #define APMDEBUG 44 #endif 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/signalvar.h> 49 #include <sys/kernel.h> 50 #include <sys/proc.h> 51 #include <sys/kthread.h> 52 #include <sys/malloc.h> 53 #include <sys/device.h> 54 #include <sys/fcntl.h> 55 #include <sys/ioctl.h> 56 #include <sys/select.h> 57 #include <sys/poll.h> 58 #include <sys/conf.h> 59 60 #include <dev/hpc/apm/apmvar.h> 61 62 #ifdef APMDEBUG 63 #define DPRINTF(f, x) do { if (apmdebug & (f)) printf x; } while (0) 64 65 66 #ifdef APMDEBUG_VALUE 67 int apmdebug = APMDEBUG_VALUE; 68 #else 69 int apmdebug = 0; 70 #endif /* APMDEBUG_VALUE */ 71 72 #else 73 #define DPRINTF(f, x) /**/ 74 #endif /* APMDEBUG */ 75 76 #define SCFLAG_OREAD 0x0000001 77 #define SCFLAG_OWRITE 0x0000002 78 #define SCFLAG_OPEN (SCFLAG_OREAD|SCFLAG_OWRITE) 79 80 #define APMUNIT(dev) (minor(dev)&0xf0) 81 #define APM(dev) (minor(dev)&0x0f) 82 #define APM_NORMAL 0 83 #define APM_CTL 8 84 85 /* 86 * A brief note on the locking protocol: it's very simple; we 87 * assert an exclusive lock any time thread context enters the 88 * APM module. This is both the APM thread itself, as well as 89 * user context. 90 */ 91 #define APM_LOCK(apmsc) \ 92 (void) mutex_enter(&(apmsc)->sc_lock) 93 #define APM_UNLOCK(apmsc) \ 94 (void) mutex_exit(&(apmsc)->sc_lock) 95 96 static void apmdevattach(device_t, device_t, void *); 97 static int apmdevmatch(device_t, cfdata_t, void *); 98 99 static void apm_event_handle(struct apm_softc *, u_int, u_int); 100 static void apm_periodic_check(struct apm_softc *); 101 static void apm_thread(void *); 102 static void apm_perror(const char *, int, ...) 103 __attribute__((__format__(__printf__,1,3))); 104 #ifdef APM_POWER_PRINT 105 static void apm_power_print(struct apm_softc *, struct apm_power_info *); 106 #endif 107 static int apm_record_event(struct apm_softc *, u_int); 108 static void apm_set_ver(struct apm_softc *); 109 static void apm_standby(struct apm_softc *); 110 static void apm_suspend(struct apm_softc *); 111 static void apm_resume(struct apm_softc *, u_int, u_int); 112 113 CFATTACH_DECL_NEW(apmdev, sizeof(struct apm_softc), 114 apmdevmatch, apmdevattach, NULL, NULL); 115 116 extern struct cfdriver apmdev_cd; 117 118 dev_type_open(apmdevopen); 119 dev_type_close(apmdevclose); 120 dev_type_ioctl(apmdevioctl); 121 dev_type_poll(apmdevpoll); 122 dev_type_kqfilter(apmdevkqfilter); 123 124 const struct cdevsw apmdev_cdevsw = { 125 apmdevopen, apmdevclose, noread, nowrite, apmdevioctl, 126 nostop, notty, apmdevpoll, nommap, apmdevkqfilter, D_OTHER 127 }; 128 129 /* configurable variables */ 130 int apm_bogus_bios = 0; 131 #ifdef APM_NO_STANDBY 132 int apm_do_standby = 0; 133 #else 134 int apm_do_standby = 1; 135 #endif 136 #ifdef APM_V10_ONLY 137 int apm_v11_enabled = 0; 138 #else 139 int apm_v11_enabled = 1; 140 #endif 141 #ifdef APM_NO_V12 142 int apm_v12_enabled = 0; 143 #else 144 int apm_v12_enabled = 1; 145 #endif 146 147 /* variables used during operation (XXX cgd) */ 148 u_char apm_majver, apm_minver; 149 int apm_inited; 150 int apm_standbys, apm_userstandbys, apm_suspends, apm_battlow; 151 int apm_damn_fool_bios, apm_op_inprog; 152 int apm_evindex; 153 154 static int apm_spl; /* saved spl while suspended */ 155 156 const char * 157 apm_strerror(int code) 158 { 159 switch (code) { 160 case APM_ERR_PM_DISABLED: 161 return ("power management disabled"); 162 case APM_ERR_REALALREADY: 163 return ("real mode interface already connected"); 164 case APM_ERR_NOTCONN: 165 return ("interface not connected"); 166 case APM_ERR_16ALREADY: 167 return ("16-bit interface already connected"); 168 case APM_ERR_16NOTSUPP: 169 return ("16-bit interface not supported"); 170 case APM_ERR_32ALREADY: 171 return ("32-bit interface already connected"); 172 case APM_ERR_32NOTSUPP: 173 return ("32-bit interface not supported"); 174 case APM_ERR_UNRECOG_DEV: 175 return ("unrecognized device ID"); 176 case APM_ERR_ERANGE: 177 return ("parameter out of range"); 178 case APM_ERR_NOTENGAGED: 179 return ("interface not engaged"); 180 case APM_ERR_UNABLE: 181 return ("unable to enter requested state"); 182 case APM_ERR_NOEVENTS: 183 return ("no pending events"); 184 case APM_ERR_NOT_PRESENT: 185 return ("no APM present"); 186 default: 187 return ("unknown error code"); 188 } 189 } 190 191 static void 192 apm_perror(const char *str, int errinfo, ...) /* XXX cgd */ 193 { 194 va_list ap; 195 196 printf("APM "); 197 198 va_start(ap, errinfo); 199 vprintf(str, ap); /* XXX cgd */ 200 va_end(ap); 201 202 printf(": %s\n", apm_strerror(errinfo)); 203 } 204 205 #ifdef APM_POWER_PRINT 206 static void 207 apm_power_print(struct apm_softc *sc, struct apm_power_info *pi) 208 { 209 210 if (pi->battery_life != APM_BATT_LIFE_UNKNOWN) { 211 aprint_normal_dev(sc->sc_dev, 212 "battery life expectancy: %d%%\n", 213 pi->battery_life); 214 } 215 aprint_normal_dev(sc->sc_dev, "A/C state: "); 216 switch (pi->ac_state) { 217 case APM_AC_OFF: 218 printf("off\n"); 219 break; 220 case APM_AC_ON: 221 printf("on\n"); 222 break; 223 case APM_AC_BACKUP: 224 printf("backup power\n"); 225 break; 226 default: 227 case APM_AC_UNKNOWN: 228 printf("unknown\n"); 229 break; 230 } 231 aprint_normal_dev(sc->sc_dev, "battery charge state:"); 232 if (apm_minver == 0) 233 switch (pi->battery_state) { 234 case APM_BATT_HIGH: 235 printf("high\n"); 236 break; 237 case APM_BATT_LOW: 238 printf("low\n"); 239 break; 240 case APM_BATT_CRITICAL: 241 printf("critical\n"); 242 break; 243 case APM_BATT_CHARGING: 244 printf("charging\n"); 245 break; 246 case APM_BATT_UNKNOWN: 247 printf("unknown\n"); 248 break; 249 default: 250 printf("undecoded state %x\n", pi->battery_state); 251 break; 252 } 253 else if (apm_minver >= 1) { 254 if (pi->battery_flags & APM_BATT_FLAG_NO_SYSTEM_BATTERY) 255 printf(" no battery"); 256 else { 257 if (pi->battery_flags & APM_BATT_FLAG_HIGH) 258 printf(" high"); 259 if (pi->battery_flags & APM_BATT_FLAG_LOW) 260 printf(" low"); 261 if (pi->battery_flags & APM_BATT_FLAG_CRITICAL) 262 printf(" critical"); 263 if (pi->battery_flags & APM_BATT_FLAG_CHARGING) 264 printf(" charging"); 265 } 266 printf("\n"); 267 if (pi->minutes_valid) { 268 aprint_normal_dev(sc->sc_dev, "estimated "); 269 if (pi->minutes_left / 60) 270 printf("%dh ", pi->minutes_left / 60); 271 printf("%dm\n", pi->minutes_left % 60); 272 } 273 } 274 return; 275 } 276 #endif 277 278 static void 279 apm_suspend(struct apm_softc *sc) 280 { 281 int error; 282 283 if (sc->sc_power_state == PWR_SUSPEND) { 284 #ifdef APMDEBUG 285 aprint_debug_dev(sc->sc_dev, 286 "apm_suspend: already suspended?\n"); 287 #endif 288 return; 289 } 290 sc->sc_power_state = PWR_SUSPEND; 291 292 dopowerhooks(PWR_SOFTSUSPEND); 293 (void) tsleep(sc, PWAIT, "apmsuspend", hz/2); 294 295 apm_spl = splhigh(); 296 297 dopowerhooks(PWR_SUSPEND); 298 299 error = (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, APM_DEV_ALLDEVS, 300 APM_SYS_SUSPEND); 301 302 if (error) 303 apm_resume(sc, 0, 0); 304 } 305 306 static void 307 apm_standby(struct apm_softc *sc) 308 { 309 int error; 310 311 if (sc->sc_power_state == PWR_STANDBY) { 312 #ifdef APMDEBUG 313 aprint_debug_dev(sc->sc_dev, 314 "apm_standby: already standing by?\n"); 315 #endif 316 return; 317 } 318 sc->sc_power_state = PWR_STANDBY; 319 320 dopowerhooks(PWR_SOFTSTANDBY); 321 (void) tsleep(sc, PWAIT, "apmstandby", hz/2); 322 323 apm_spl = splhigh(); 324 325 dopowerhooks(PWR_STANDBY); 326 327 error = (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, APM_DEV_ALLDEVS, 328 APM_SYS_STANDBY); 329 if (error) 330 apm_resume(sc, 0, 0); 331 } 332 333 static void 334 apm_resume(struct apm_softc *sc, u_int event_type, u_int event_info) 335 { 336 337 if (sc->sc_power_state == PWR_RESUME) { 338 #ifdef APMDEBUG 339 aprint_debug_dev(sc->sc_dev, "apm_resume: already running?\n"); 340 #endif 341 return; 342 } 343 sc->sc_power_state = PWR_RESUME; 344 345 #if 0 /* XXX: def TIME_FREQ */ 346 /* 347 * Some system requires its clock to be initialized after hybernation. 348 */ 349 initrtclock(TIMER_FREQ); 350 #endif 351 352 inittodr(time_second); 353 dopowerhooks(PWR_RESUME); 354 355 splx(apm_spl); 356 357 dopowerhooks(PWR_SOFTRESUME); 358 359 apm_record_event(sc, event_type); 360 } 361 362 /* 363 * return 0 if the user will notice and handle the event, 364 * return 1 if the kernel driver should do so. 365 */ 366 static int 367 apm_record_event(struct apm_softc *sc, u_int event_type) 368 { 369 struct apm_event_info *evp; 370 371 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 372 return 1; /* no user waiting */ 373 if (sc->sc_event_count == APM_NEVENTS) 374 return 1; /* overflow */ 375 evp = &sc->sc_event_list[sc->sc_event_ptr]; 376 sc->sc_event_count++; 377 sc->sc_event_ptr++; 378 sc->sc_event_ptr %= APM_NEVENTS; 379 evp->type = event_type; 380 evp->index = ++apm_evindex; 381 selnotify(&sc->sc_rsel, 0, 0); 382 return (sc->sc_flags & SCFLAG_OWRITE) ? 0 : 1; /* user may handle */ 383 } 384 385 static void 386 apm_event_handle(struct apm_softc *sc, u_int event_code, u_int event_info) 387 { 388 int error; 389 const char *code; 390 struct apm_power_info pi; 391 392 switch (event_code) { 393 case APM_USER_STANDBY_REQ: 394 DPRINTF(APMDEBUG_EVENTS, ("apmev: user standby request\n")); 395 if (apm_do_standby) { 396 if (apm_op_inprog == 0 && apm_record_event(sc, event_code)) 397 apm_userstandbys++; 398 apm_op_inprog++; 399 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 400 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 401 } else { 402 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 403 APM_DEV_ALLDEVS, APM_LASTREQ_REJECTED); 404 /* in case BIOS hates being spurned */ 405 (*sc->sc_ops->aa_enable)(sc->sc_cookie, 1); 406 } 407 break; 408 409 case APM_STANDBY_REQ: 410 DPRINTF(APMDEBUG_EVENTS, ("apmev: system standby request\n")); 411 if (apm_standbys || apm_suspends) { 412 DPRINTF(APMDEBUG_EVENTS | APMDEBUG_ANOM, 413 ("damn fool BIOS did not wait for answer\n")); 414 /* just give up the fight */ 415 apm_damn_fool_bios = 1; 416 } 417 if (apm_do_standby) { 418 if (apm_op_inprog == 0 && 419 apm_record_event(sc, event_code)) 420 apm_standbys++; 421 apm_op_inprog++; 422 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 423 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 424 } else { 425 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 426 APM_DEV_ALLDEVS, APM_LASTREQ_REJECTED); 427 /* in case BIOS hates being spurned */ 428 (*sc->sc_ops->aa_enable)(sc->sc_cookie, 1); 429 } 430 break; 431 432 case APM_USER_SUSPEND_REQ: 433 DPRINTF(APMDEBUG_EVENTS, ("apmev: user suspend request\n")); 434 if (apm_op_inprog == 0 && apm_record_event(sc, event_code)) 435 apm_suspends++; 436 apm_op_inprog++; 437 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 438 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 439 break; 440 441 case APM_SUSPEND_REQ: 442 DPRINTF(APMDEBUG_EVENTS, ("apmev: system suspend request\n")); 443 if (apm_standbys || apm_suspends) { 444 DPRINTF(APMDEBUG_EVENTS | APMDEBUG_ANOM, 445 ("damn fool BIOS did not wait for answer\n")); 446 /* just give up the fight */ 447 apm_damn_fool_bios = 1; 448 } 449 if (apm_op_inprog == 0 && apm_record_event(sc, event_code)) 450 apm_suspends++; 451 apm_op_inprog++; 452 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 453 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 454 break; 455 456 case APM_POWER_CHANGE: 457 DPRINTF(APMDEBUG_EVENTS, ("apmev: power status change\n")); 458 error = (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, &pi); 459 #ifdef APM_POWER_PRINT 460 /* only print if nobody is catching events. */ 461 if (error == 0 && 462 (sc->sc_flags & (SCFLAG_OREAD|SCFLAG_OWRITE)) == 0) 463 apm_power_print(sc, &pi); 464 #else 465 __USE(error); 466 #endif 467 apm_record_event(sc, event_code); 468 break; 469 470 case APM_NORMAL_RESUME: 471 DPRINTF(APMDEBUG_EVENTS, ("apmev: resume system\n")); 472 apm_resume(sc, event_code, event_info); 473 break; 474 475 case APM_CRIT_RESUME: 476 DPRINTF(APMDEBUG_EVENTS, ("apmev: critical resume system")); 477 apm_resume(sc, event_code, event_info); 478 break; 479 480 case APM_SYS_STANDBY_RESUME: 481 DPRINTF(APMDEBUG_EVENTS, ("apmev: system standby resume\n")); 482 apm_resume(sc, event_code, event_info); 483 break; 484 485 case APM_UPDATE_TIME: 486 DPRINTF(APMDEBUG_EVENTS, ("apmev: update time\n")); 487 apm_resume(sc, event_code, event_info); 488 break; 489 490 case APM_CRIT_SUSPEND_REQ: 491 DPRINTF(APMDEBUG_EVENTS, ("apmev: critical system suspend\n")); 492 apm_record_event(sc, event_code); 493 apm_suspend(sc); 494 break; 495 496 case APM_BATTERY_LOW: 497 DPRINTF(APMDEBUG_EVENTS, ("apmev: battery low\n")); 498 apm_battlow++; 499 apm_record_event(sc, event_code); 500 break; 501 502 case APM_CAP_CHANGE: 503 DPRINTF(APMDEBUG_EVENTS, ("apmev: capability change\n")); 504 if (apm_minver < 2) { 505 DPRINTF(APMDEBUG_EVENTS, ("apm: unexpected event\n")); 506 } else { 507 u_int numbatts, capflags; 508 (*sc->sc_ops->aa_get_capabilities)(sc->sc_cookie, 509 &numbatts, &capflags); 510 (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, &pi); 511 } 512 break; 513 514 default: 515 switch (event_code >> 8) { 516 case 0: 517 code = "reserved system"; 518 break; 519 case 1: 520 code = "reserved device"; 521 break; 522 case 2: 523 code = "OEM defined"; 524 break; 525 default: 526 code = "reserved"; 527 break; 528 } 529 printf("APM: %s event code %x\n", code, event_code); 530 } 531 } 532 533 static void 534 apm_periodic_check(struct apm_softc *sc) 535 { 536 int error; 537 u_int event_code, event_info; 538 539 540 /* 541 * tell the BIOS we're working on it, if asked to do a 542 * suspend/standby 543 */ 544 if (apm_op_inprog) 545 (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, APM_DEV_ALLDEVS, 546 APM_LASTREQ_INPROG); 547 548 while ((error = (*sc->sc_ops->aa_get_event)(sc->sc_cookie, &event_code, 549 &event_info)) == 0 && !apm_damn_fool_bios) 550 apm_event_handle(sc, event_code, event_info); 551 552 if (error != APM_ERR_NOEVENTS) 553 apm_perror("get event", error); 554 if (apm_suspends) { 555 apm_op_inprog = 0; 556 apm_suspend(sc); 557 } else if (apm_standbys || apm_userstandbys) { 558 apm_op_inprog = 0; 559 apm_standby(sc); 560 } 561 apm_suspends = apm_standbys = apm_battlow = apm_userstandbys = 0; 562 apm_damn_fool_bios = 0; 563 } 564 565 static void 566 apm_set_ver(struct apm_softc *sc) 567 { 568 569 if (apm_v12_enabled && 570 APM_MAJOR_VERS(sc->sc_vers) == 1 && 571 APM_MINOR_VERS(sc->sc_vers) == 2) { 572 apm_majver = 1; 573 apm_minver = 2; 574 goto ok; 575 } 576 577 if (apm_v11_enabled && 578 APM_MAJOR_VERS(sc->sc_vers) == 1 && 579 APM_MINOR_VERS(sc->sc_vers) == 1) { 580 apm_majver = 1; 581 apm_minver = 1; 582 } else { 583 apm_majver = 1; 584 apm_minver = 0; 585 } 586 ok: 587 aprint_normal("Power Management spec V%d.%d", apm_majver, apm_minver); 588 apm_inited = 1; 589 } 590 591 static int 592 apmdevmatch(device_t parent, cfdata_t match, void *aux) 593 { 594 595 return apm_match(); 596 } 597 598 static void 599 apmdevattach(device_t parent, device_t self, void *aux) 600 { 601 struct apm_softc *sc; 602 struct apmdev_attach_args *aaa = aux; 603 604 sc = device_private(self); 605 sc->sc_dev = self; 606 607 sc->sc_detail = aaa->apm_detail; 608 sc->sc_vers = aaa->apm_detail & 0xffff; /* XXX: magic */ 609 610 sc->sc_ops = aaa->accessops; 611 sc->sc_cookie = aaa->accesscookie; 612 613 apm_attach(sc); 614 } 615 616 /* 617 * Print function (for parent devices). 618 */ 619 int 620 apmprint(void *aux, const char *pnp) 621 { 622 if (pnp) 623 aprint_normal("apm at %s", pnp); 624 625 return (UNCONF); 626 } 627 628 int 629 apm_match(void) 630 { 631 static int got; 632 return !got++; 633 } 634 635 void 636 apm_attach(struct apm_softc *sc) 637 { 638 struct apm_power_info pinfo; 639 u_int numbatts, capflags; 640 int error; 641 642 aprint_naive("\n"); 643 aprint_normal(": "); 644 645 switch ((APM_MAJOR_VERS(sc->sc_vers) << 8) + APM_MINOR_VERS(sc->sc_vers)) { 646 case 0x0100: 647 apm_v11_enabled = 0; 648 apm_v12_enabled = 0; 649 break; 650 case 0x0101: 651 apm_v12_enabled = 0; 652 /* fall through */ 653 case 0x0102: 654 default: 655 break; 656 } 657 658 apm_set_ver(sc); /* prints version info */ 659 aprint_normal("\n"); 660 if (apm_minver >= 2) 661 (*sc->sc_ops->aa_get_capabilities)(sc->sc_cookie, &numbatts, 662 &capflags); 663 664 /* 665 * enable power management 666 */ 667 (*sc->sc_ops->aa_enable)(sc->sc_cookie, 1); 668 669 error = (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, &pinfo); 670 if (error == 0) { 671 #ifdef APM_POWER_PRINT 672 apm_power_print(sc, &pinfo); 673 #endif 674 } else 675 apm_perror("get power status", error); 676 677 if (sc->sc_ops->aa_cpu_busy) 678 (*sc->sc_ops->aa_cpu_busy)(sc->sc_cookie); 679 680 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 681 682 /* Initial state is `resumed'. */ 683 sc->sc_power_state = PWR_RESUME; 684 selinit(&sc->sc_rsel); 685 selinit(&sc->sc_xsel); 686 687 /* Do an initial check. */ 688 apm_periodic_check(sc); 689 690 /* 691 * Create a kernel thread to periodically check for APM events, 692 * and notify other subsystems when they occur. 693 */ 694 if (kthread_create(PRI_NONE, 0, NULL, apm_thread, sc, 695 &sc->sc_thread, "%s", device_xname(sc->sc_dev)) != 0) { 696 /* 697 * We were unable to create the APM thread; bail out. 698 */ 699 if (sc->sc_ops->aa_disconnect) 700 (*sc->sc_ops->aa_disconnect)(sc->sc_cookie); 701 aprint_error_dev(sc->sc_dev, "unable to create thread, " 702 "kernel APM support disabled\n"); 703 } 704 } 705 706 void 707 apm_thread(void *arg) 708 { 709 struct apm_softc *apmsc = arg; 710 711 /* 712 * Loop forever, doing a periodic check for APM events. 713 */ 714 for (;;) { 715 APM_LOCK(apmsc); 716 apm_periodic_check(apmsc); 717 APM_UNLOCK(apmsc); 718 (void) tsleep(apmsc, PWAIT, "apmev", (8 * hz) / 7); 719 } 720 } 721 722 int 723 apmdevopen(dev_t dev, int flag, int mode, struct lwp *l) 724 { 725 int ctl = APM(dev); 726 int error = 0; 727 struct apm_softc *sc; 728 729 sc = device_lookup_private(&apmdev_cd, APMUNIT(dev)); 730 if (!sc) 731 return ENXIO; 732 733 if (!apm_inited) 734 return ENXIO; 735 736 DPRINTF(APMDEBUG_DEVICE, 737 ("apmopen: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 738 739 APM_LOCK(sc); 740 switch (ctl) { 741 case APM_CTL: 742 if (!(flag & FWRITE)) { 743 error = EINVAL; 744 break; 745 } 746 if (sc->sc_flags & SCFLAG_OWRITE) { 747 error = EBUSY; 748 break; 749 } 750 sc->sc_flags |= SCFLAG_OWRITE; 751 break; 752 case APM_NORMAL: 753 if (!(flag & FREAD) || (flag & FWRITE)) { 754 error = EINVAL; 755 break; 756 } 757 sc->sc_flags |= SCFLAG_OREAD; 758 break; 759 default: 760 error = ENXIO; 761 break; 762 } 763 APM_UNLOCK(sc); 764 765 return (error); 766 } 767 768 int 769 apmdevclose(dev_t dev, int flag, int mode, 770 struct lwp *l) 771 { 772 struct apm_softc *sc = device_lookup_private(&apmdev_cd, APMUNIT(dev)); 773 int ctl = APM(dev); 774 775 DPRINTF(APMDEBUG_DEVICE, 776 ("apmclose: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 777 778 APM_LOCK(sc); 779 switch (ctl) { 780 case APM_CTL: 781 sc->sc_flags &= ~SCFLAG_OWRITE; 782 break; 783 case APM_NORMAL: 784 sc->sc_flags &= ~SCFLAG_OREAD; 785 break; 786 } 787 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 788 sc->sc_event_count = 0; 789 sc->sc_event_ptr = 0; 790 } 791 APM_UNLOCK(sc); 792 return 0; 793 } 794 795 int 796 apmdevioctl(dev_t dev, u_long cmd, void *data, int flag, 797 struct lwp *l) 798 { 799 struct apm_softc *sc = device_lookup_private(&apmdev_cd, APMUNIT(dev)); 800 struct apm_power_info *powerp; 801 struct apm_event_info *evp; 802 #if 0 803 struct apm_ctl *actl; 804 #endif 805 int i, error = 0; 806 int batt_flags; 807 808 APM_LOCK(sc); 809 switch (cmd) { 810 case APM_IOC_STANDBY: 811 if (!apm_do_standby) { 812 error = EOPNOTSUPP; 813 break; 814 } 815 816 if ((flag & FWRITE) == 0) { 817 error = EBADF; 818 break; 819 } 820 apm_userstandbys++; 821 break; 822 823 case APM_IOC_SUSPEND: 824 if ((flag & FWRITE) == 0) { 825 error = EBADF; 826 break; 827 } 828 apm_suspends++; 829 break; 830 831 case APM_IOC_NEXTEVENT: 832 if (!sc->sc_event_count) 833 error = EAGAIN; 834 else { 835 evp = (struct apm_event_info *)data; 836 i = sc->sc_event_ptr + APM_NEVENTS - sc->sc_event_count; 837 i %= APM_NEVENTS; 838 *evp = sc->sc_event_list[i]; 839 sc->sc_event_count--; 840 } 841 break; 842 843 case OAPM_IOC_GETPOWER: 844 case APM_IOC_GETPOWER: 845 powerp = (struct apm_power_info *)data; 846 if ((error = (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, 847 powerp)) != 0) { 848 apm_perror("ioctl get power status", error); 849 error = EIO; 850 break; 851 } 852 switch (apm_minver) { 853 case 0: 854 break; 855 case 1: 856 default: 857 batt_flags = powerp->battery_flags; 858 powerp->battery_state = APM_BATT_UNKNOWN; 859 if (batt_flags & APM_BATT_FLAG_HIGH) 860 powerp->battery_state = APM_BATT_HIGH; 861 else if (batt_flags & APM_BATT_FLAG_LOW) 862 powerp->battery_state = APM_BATT_LOW; 863 else if (batt_flags & APM_BATT_FLAG_CRITICAL) 864 powerp->battery_state = APM_BATT_CRITICAL; 865 else if (batt_flags & APM_BATT_FLAG_CHARGING) 866 powerp->battery_state = APM_BATT_CHARGING; 867 else if (batt_flags & APM_BATT_FLAG_NO_SYSTEM_BATTERY) 868 powerp->battery_state = APM_BATT_ABSENT; 869 break; 870 } 871 break; 872 873 default: 874 error = ENOTTY; 875 } 876 APM_UNLOCK(sc); 877 878 return (error); 879 } 880 881 int 882 apmdevpoll(dev_t dev, int events, struct lwp *l) 883 { 884 struct apm_softc *sc = device_lookup_private(&apmdev_cd, APMUNIT(dev)); 885 int revents = 0; 886 887 APM_LOCK(sc); 888 if (events & (POLLIN | POLLRDNORM)) { 889 if (sc->sc_event_count) 890 revents |= events & (POLLIN | POLLRDNORM); 891 else 892 selrecord(l, &sc->sc_rsel); 893 } 894 APM_UNLOCK(sc); 895 896 return (revents); 897 } 898 899 static void 900 filt_apmrdetach(struct knote *kn) 901 { 902 struct apm_softc *sc = kn->kn_hook; 903 904 APM_LOCK(sc); 905 SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); 906 APM_UNLOCK(sc); 907 } 908 909 static int 910 filt_apmread(struct knote *kn, long hint) 911 { 912 struct apm_softc *sc = kn->kn_hook; 913 914 kn->kn_data = sc->sc_event_count; 915 return (kn->kn_data > 0); 916 } 917 918 static const struct filterops apmread_filtops = 919 { 1, NULL, filt_apmrdetach, filt_apmread }; 920 921 int 922 apmdevkqfilter(dev_t dev, struct knote *kn) 923 { 924 struct apm_softc *sc = device_lookup_private(&apmdev_cd, APMUNIT(dev)); 925 struct klist *klist; 926 927 switch (kn->kn_filter) { 928 case EVFILT_READ: 929 klist = &sc->sc_rsel.sel_klist; 930 kn->kn_fop = &apmread_filtops; 931 break; 932 933 default: 934 return (EINVAL); 935 } 936 937 kn->kn_hook = sc; 938 939 APM_LOCK(sc); 940 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 941 APM_UNLOCK(sc); 942 943 return (0); 944 } 945
Indexes created Wed Sep 24 05:09:52 GMT 2025