apm.c revision 1.20.4.3
1 /* $NetBSD: apm.c,v 1.20.4.3 2010/03/11 15:03:23 yamt 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: apm.c,v 1.20.4.3 2010/03/11 15:03:23 yamt Exp $"); 37 38 #include "opt_apm.h" 39 40 #ifdef APM_NOIDLE 41 #error APM_NOIDLE option deprecated; use APM_NO_IDLE instead 42 #endif 43 44 #if defined(DEBUG) && !defined(APMDEBUG) 45 #define APMDEBUG 46 #endif 47 48 #include <sys/param.h> 49 #include <sys/systm.h> 50 #include <sys/signalvar.h> 51 #include <sys/kernel.h> 52 #include <sys/proc.h> 53 #include <sys/kthread.h> 54 #include <sys/malloc.h> 55 #include <sys/device.h> 56 #include <sys/fcntl.h> 57 #include <sys/ioctl.h> 58 #include <sys/select.h> 59 #include <sys/poll.h> 60 #include <sys/conf.h> 61 62 #include <dev/apm/apmvar.h> 63 64 #include <machine/stdarg.h> 65 66 #ifdef APMDEBUG 67 #define DPRINTF(f, x) do { if (apmdebug & (f)) printf x; } while (0) 68 69 70 #ifdef APMDEBUG_VALUE 71 int apmdebug = APMDEBUG_VALUE; 72 #else 73 int apmdebug = 0; 74 #endif /* APMDEBUG_VALUE */ 75 76 #else 77 #define DPRINTF(f, x) /**/ 78 #endif /* APMDEBUG */ 79 80 #define SCFLAG_OREAD 0x0000001 81 #define SCFLAG_OWRITE 0x0000002 82 #define SCFLAG_OPEN (SCFLAG_OREAD|SCFLAG_OWRITE) 83 84 #define APMUNIT(dev) (minor(dev)&0xf0) 85 #define APM(dev) (minor(dev)&0x0f) 86 #define APM_NORMAL 0 87 #define APM_CTL 8 88 89 /* 90 * A brief note on the locking protocol: it's very simple; we 91 * assert an exclusive lock any time thread context enters the 92 * APM module. This is both the APM thread itself, as well as 93 * user context. 94 */ 95 #define APM_LOCK(apmsc) \ 96 (void) mutex_enter(&(apmsc)->sc_lock) 97 #define APM_UNLOCK(apmsc) \ 98 (void) mutex_exit(&(apmsc)->sc_lock) 99 100 static void apm_event_handle(struct apm_softc *, u_int, u_int); 101 static void apm_periodic_check(struct apm_softc *); 102 static void apm_thread(void *); 103 static void apm_perror(const char *, int, ...) 104 __attribute__((__format__(__printf__,1,3))); 105 #ifdef APM_POWER_PRINT 106 static void apm_power_print(struct apm_softc *, struct apm_power_info *); 107 #endif 108 static int apm_record_event(struct apm_softc *, u_int); 109 static void apm_set_ver(struct apm_softc *); 110 static void apm_standby(struct apm_softc *); 111 static void apm_suspend(struct apm_softc *); 112 static void apm_resume(struct apm_softc *, u_int, u_int); 113 114 extern struct cfdriver apm_cd; 115 116 dev_type_open(apmopen); 117 dev_type_close(apmclose); 118 dev_type_ioctl(apmioctl); 119 dev_type_poll(apmpoll); 120 dev_type_kqfilter(apmkqfilter); 121 122 const struct cdevsw apm_cdevsw = { 123 apmopen, apmclose, noread, nowrite, apmioctl, 124 nostop, notty, apmpoll, nommap, apmkqfilter, D_OTHER, 125 }; 126 127 /* configurable variables */ 128 int apm_bogus_bios = 0; 129 #ifdef APM_DISABLE 130 int apm_enabled = 0; 131 #else 132 int apm_enabled = 1; 133 #endif 134 #ifdef APM_NO_IDLE 135 int apm_do_idle = 0; 136 #else 137 int apm_do_idle = 1; 138 #endif 139 #ifdef APM_NO_STANDBY 140 int apm_do_standby = 0; 141 #else 142 int apm_do_standby = 1; 143 #endif 144 #ifdef APM_V10_ONLY 145 int apm_v11_enabled = 0; 146 #else 147 int apm_v11_enabled = 1; 148 #endif 149 #ifdef APM_NO_V12 150 int apm_v12_enabled = 0; 151 #else 152 int apm_v12_enabled = 1; 153 #endif 154 #ifdef APM_FORCE_64K_SEGMENTS 155 int apm_force_64k_segments = 1; 156 #else 157 int apm_force_64k_segments = 0; 158 #endif 159 #ifdef APM_ALLOW_BOGUS_SEGMENTS 160 int apm_allow_bogus_segments = 1; 161 #else 162 int apm_allow_bogus_segments = 0; 163 #endif 164 165 /* variables used during operation (XXX cgd) */ 166 u_char apm_majver, apm_minver; 167 int apm_inited; 168 int apm_standbys, apm_userstandbys, apm_suspends, apm_battlow; 169 int apm_damn_fool_bios, apm_op_inprog; 170 int apm_evindex; 171 172 static int apm_spl; /* saved spl while suspended */ 173 174 const char * 175 apm_strerror(int code) 176 { 177 switch (code) { 178 case APM_ERR_PM_DISABLED: 179 return ("power management disabled"); 180 case APM_ERR_REALALREADY: 181 return ("real mode interface already connected"); 182 case APM_ERR_NOTCONN: 183 return ("interface not connected"); 184 case APM_ERR_16ALREADY: 185 return ("16-bit interface already connected"); 186 case APM_ERR_16NOTSUPP: 187 return ("16-bit interface not supported"); 188 case APM_ERR_32ALREADY: 189 return ("32-bit interface already connected"); 190 case APM_ERR_32NOTSUPP: 191 return ("32-bit interface not supported"); 192 case APM_ERR_UNRECOG_DEV: 193 return ("unrecognized device ID"); 194 case APM_ERR_ERANGE: 195 return ("parameter out of range"); 196 case APM_ERR_NOTENGAGED: 197 return ("interface not engaged"); 198 case APM_ERR_UNABLE: 199 return ("unable to enter requested state"); 200 case APM_ERR_NOEVENTS: 201 return ("no pending events"); 202 case APM_ERR_NOT_PRESENT: 203 return ("no APM present"); 204 default: 205 return ("unknown error code"); 206 } 207 } 208 209 static void 210 apm_perror(const char *str, int errinfo, ...) /* XXX cgd */ 211 { 212 va_list ap; 213 214 printf("APM "); 215 216 va_start(ap, errinfo); 217 vprintf(str, ap); /* XXX cgd */ 218 va_end(ap); 219 220 printf(": %s\n", apm_strerror(errinfo)); 221 } 222 223 #ifdef APM_POWER_PRINT 224 static void 225 apm_power_print(struct apm_softc *sc, struct apm_power_info *pi) 226 { 227 228 if (pi->battery_life != APM_BATT_LIFE_UNKNOWN) { 229 aprint_normal_dev(sc->sc_dev, 230 "battery life expectancy: %d%%\n", 231 pi->battery_life); 232 } 233 aprint_normal_dev(sc->sc_dev, "A/C state: "); 234 switch (pi->ac_state) { 235 case APM_AC_OFF: 236 printf("off\n"); 237 break; 238 case APM_AC_ON: 239 printf("on\n"); 240 break; 241 case APM_AC_BACKUP: 242 printf("backup power\n"); 243 break; 244 default: 245 case APM_AC_UNKNOWN: 246 printf("unknown\n"); 247 break; 248 } 249 aprint_normal_dev(sc->sc_dev, "battery charge state:"); 250 if (apm_minver == 0) 251 switch (pi->battery_state) { 252 case APM_BATT_HIGH: 253 printf("high\n"); 254 break; 255 case APM_BATT_LOW: 256 printf("low\n"); 257 break; 258 case APM_BATT_CRITICAL: 259 printf("critical\n"); 260 break; 261 case APM_BATT_CHARGING: 262 printf("charging\n"); 263 break; 264 case APM_BATT_UNKNOWN: 265 printf("unknown\n"); 266 break; 267 default: 268 printf("undecoded state %x\n", pi->battery_state); 269 break; 270 } 271 else if (apm_minver >= 1) { 272 if (pi->battery_flags & APM_BATT_FLAG_NO_SYSTEM_BATTERY) 273 printf(" no battery"); 274 else { 275 if (pi->battery_flags & APM_BATT_FLAG_HIGH) 276 printf(" high"); 277 if (pi->battery_flags & APM_BATT_FLAG_LOW) 278 printf(" low"); 279 if (pi->battery_flags & APM_BATT_FLAG_CRITICAL) 280 printf(" critical"); 281 if (pi->battery_flags & APM_BATT_FLAG_CHARGING) 282 printf(" charging"); 283 } 284 printf("\n"); 285 if (pi->minutes_valid) { 286 aprint_normal_dev(sc->sc_dev, "estimated "); 287 if (pi->minutes_left / 60) 288 printf("%dh ", pi->minutes_left / 60); 289 printf("%dm\n", pi->minutes_left % 60); 290 } 291 } 292 return; 293 } 294 #endif 295 296 static void 297 apm_suspend(struct apm_softc *sc) 298 { 299 int error; 300 301 if (sc->sc_power_state == PWR_SUSPEND) { 302 #ifdef APMDEBUG 303 aprint_debug_dev(sc->sc_dev, 304 "apm_suspend: already suspended?\n"); 305 #endif 306 return; 307 } 308 sc->sc_power_state = PWR_SUSPEND; 309 310 if (!(sc->sc_hwflags & APM_F_DONT_RUN_HOOKS)) { 311 pmf_system_suspend(PMF_Q_NONE); 312 apm_spl = splhigh(); 313 } 314 315 error = (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, APM_DEV_ALLDEVS, 316 APM_SYS_SUSPEND); 317 318 if (error) 319 apm_resume(sc, 0, 0); 320 } 321 322 static void 323 apm_standby(struct apm_softc *sc) 324 { 325 int error; 326 327 if (sc->sc_power_state == PWR_STANDBY) { 328 #ifdef APMDEBUG 329 aprint_debug_dev(sc->sc_dev, 330 "apm_standby: already standing by?\n"); 331 #endif 332 return; 333 } 334 sc->sc_power_state = PWR_STANDBY; 335 336 if (!(sc->sc_hwflags & APM_F_DONT_RUN_HOOKS)) { 337 pmf_system_suspend(PMF_Q_NONE); 338 apm_spl = splhigh(); 339 } 340 error = (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, APM_DEV_ALLDEVS, 341 APM_SYS_STANDBY); 342 if (error) 343 apm_resume(sc, 0, 0); 344 } 345 346 static void 347 apm_resume(struct apm_softc *sc, u_int event_type, u_int event_info) 348 { 349 350 if (sc->sc_power_state == PWR_RESUME) { 351 #ifdef APMDEBUG 352 aprint_debug_dev(sc->sc_dev, "apm_resume: already running?\n"); 353 #endif 354 return; 355 } 356 sc->sc_power_state = PWR_RESUME; 357 358 #ifdef TIMER_FREQ 359 /* 360 * Some system requires its clock to be initialized after hybernation. 361 */ 362 initrtclock(TIMER_FREQ); 363 #endif 364 365 inittodr(time_second); 366 if (!(sc->sc_hwflags & APM_F_DONT_RUN_HOOKS)) { 367 splx(apm_spl); 368 pmf_system_resume(PMF_Q_NONE); 369 } 370 371 apm_record_event(sc, event_type); 372 } 373 374 /* 375 * return 0 if the user will notice and handle the event, 376 * return 1 if the kernel driver should do so. 377 */ 378 static int 379 apm_record_event(struct apm_softc *sc, u_int event_type) 380 { 381 struct apm_event_info *evp; 382 383 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 384 return 1; /* no user waiting */ 385 if (sc->sc_event_count == APM_NEVENTS) 386 return 1; /* overflow */ 387 evp = &sc->sc_event_list[sc->sc_event_ptr]; 388 sc->sc_event_count++; 389 sc->sc_event_ptr++; 390 sc->sc_event_ptr %= APM_NEVENTS; 391 evp->type = event_type; 392 evp->index = ++apm_evindex; 393 selnotify(&sc->sc_rsel, 0, 0); 394 return (sc->sc_flags & SCFLAG_OWRITE) ? 0 : 1; /* user may handle */ 395 } 396 397 static void 398 apm_event_handle(struct apm_softc *sc, u_int event_code, u_int event_info) 399 { 400 int error; 401 const char *code; 402 struct apm_power_info pi; 403 404 switch (event_code) { 405 case APM_USER_STANDBY_REQ: 406 DPRINTF(APMDEBUG_EVENTS, ("apmev: user standby request\n")); 407 if (apm_do_standby) { 408 if (apm_op_inprog == 0 && apm_record_event(sc, event_code)) 409 apm_userstandbys++; 410 apm_op_inprog++; 411 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 412 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 413 } else { 414 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 415 APM_DEV_ALLDEVS, APM_LASTREQ_REJECTED); 416 /* in case BIOS hates being spurned */ 417 (*sc->sc_ops->aa_enable)(sc->sc_cookie, 1); 418 } 419 break; 420 421 case APM_STANDBY_REQ: 422 DPRINTF(APMDEBUG_EVENTS, ("apmev: system standby request\n")); 423 if (apm_standbys || apm_suspends) { 424 DPRINTF(APMDEBUG_EVENTS | APMDEBUG_ANOM, 425 ("damn fool BIOS did not wait for answer\n")); 426 /* just give up the fight */ 427 apm_damn_fool_bios = 1; 428 } 429 if (apm_do_standby) { 430 if (apm_op_inprog == 0 && 431 apm_record_event(sc, event_code)) 432 apm_standbys++; 433 apm_op_inprog++; 434 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 435 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 436 } else { 437 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 438 APM_DEV_ALLDEVS, APM_LASTREQ_REJECTED); 439 /* in case BIOS hates being spurned */ 440 (*sc->sc_ops->aa_enable)(sc->sc_cookie, 1); 441 } 442 break; 443 444 case APM_USER_SUSPEND_REQ: 445 DPRINTF(APMDEBUG_EVENTS, ("apmev: user suspend request\n")); 446 if (apm_op_inprog == 0 && apm_record_event(sc, event_code)) 447 apm_suspends++; 448 apm_op_inprog++; 449 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 450 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 451 break; 452 453 case APM_SUSPEND_REQ: 454 DPRINTF(APMDEBUG_EVENTS, ("apmev: system suspend request\n")); 455 if (apm_standbys || apm_suspends) { 456 DPRINTF(APMDEBUG_EVENTS | APMDEBUG_ANOM, 457 ("damn fool BIOS did not wait for answer\n")); 458 /* just give up the fight */ 459 apm_damn_fool_bios = 1; 460 } 461 if (apm_op_inprog == 0 && apm_record_event(sc, event_code)) 462 apm_suspends++; 463 apm_op_inprog++; 464 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 465 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 466 break; 467 468 case APM_POWER_CHANGE: 469 DPRINTF(APMDEBUG_EVENTS, ("apmev: power status change\n")); 470 error = (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, &pi); 471 #ifdef APM_POWER_PRINT 472 /* only print if nobody is catching events. */ 473 if (error == 0 && 474 (sc->sc_flags & (SCFLAG_OREAD|SCFLAG_OWRITE)) == 0) 475 apm_power_print(sc, &pi); 476 #endif 477 apm_record_event(sc, event_code); 478 break; 479 480 case APM_NORMAL_RESUME: 481 DPRINTF(APMDEBUG_EVENTS, ("apmev: resume system\n")); 482 apm_resume(sc, event_code, event_info); 483 break; 484 485 case APM_CRIT_RESUME: 486 DPRINTF(APMDEBUG_EVENTS, ("apmev: critical resume system")); 487 apm_resume(sc, event_code, event_info); 488 break; 489 490 case APM_SYS_STANDBY_RESUME: 491 DPRINTF(APMDEBUG_EVENTS, ("apmev: system standby resume\n")); 492 apm_resume(sc, event_code, event_info); 493 break; 494 495 case APM_UPDATE_TIME: 496 DPRINTF(APMDEBUG_EVENTS, ("apmev: update time\n")); 497 apm_resume(sc, event_code, event_info); 498 break; 499 500 case APM_CRIT_SUSPEND_REQ: 501 DPRINTF(APMDEBUG_EVENTS, ("apmev: critical system suspend\n")); 502 apm_record_event(sc, event_code); 503 apm_suspend(sc); 504 break; 505 506 case APM_BATTERY_LOW: 507 DPRINTF(APMDEBUG_EVENTS, ("apmev: battery low\n")); 508 apm_battlow++; 509 apm_record_event(sc, event_code); 510 break; 511 512 case APM_CAP_CHANGE: 513 DPRINTF(APMDEBUG_EVENTS, ("apmev: capability change\n")); 514 if (apm_minver < 2) { 515 DPRINTF(APMDEBUG_EVENTS, ("apm: unexpected event\n")); 516 } else { 517 u_int numbatts, capflags; 518 (*sc->sc_ops->aa_get_capabilities)(sc->sc_cookie, 519 &numbatts, &capflags); 520 (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, &pi); 521 } 522 break; 523 524 default: 525 switch (event_code >> 8) { 526 case 0: 527 code = "reserved system"; 528 break; 529 case 1: 530 code = "reserved device"; 531 break; 532 case 2: 533 code = "OEM defined"; 534 break; 535 default: 536 code = "reserved"; 537 break; 538 } 539 printf("APM: %s event code %x\n", code, event_code); 540 } 541 } 542 543 static void 544 apm_periodic_check(struct apm_softc *sc) 545 { 546 int error; 547 u_int event_code, event_info; 548 549 550 /* 551 * tell the BIOS we're working on it, if asked to do a 552 * suspend/standby 553 */ 554 if (apm_op_inprog) 555 (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, APM_DEV_ALLDEVS, 556 APM_LASTREQ_INPROG); 557 558 while ((error = (*sc->sc_ops->aa_get_event)(sc->sc_cookie, &event_code, 559 &event_info)) == 0 && !apm_damn_fool_bios) 560 apm_event_handle(sc, event_code, event_info); 561 562 if (error != APM_ERR_NOEVENTS) 563 apm_perror("get event", error); 564 if (apm_suspends) { 565 apm_op_inprog = 0; 566 apm_suspend(sc); 567 } else if (apm_standbys || apm_userstandbys) { 568 apm_op_inprog = 0; 569 apm_standby(sc); 570 } 571 apm_suspends = apm_standbys = apm_battlow = apm_userstandbys = 0; 572 apm_damn_fool_bios = 0; 573 } 574 575 static void 576 apm_set_ver(struct apm_softc *sc) 577 { 578 579 if (apm_v12_enabled && 580 APM_MAJOR_VERS(sc->sc_vers) == 1 && 581 APM_MINOR_VERS(sc->sc_vers) == 2) { 582 apm_majver = 1; 583 apm_minver = 2; 584 goto ok; 585 } 586 587 if (apm_v11_enabled && 588 APM_MAJOR_VERS(sc->sc_vers) == 1 && 589 APM_MINOR_VERS(sc->sc_vers) == 1) { 590 apm_majver = 1; 591 apm_minver = 1; 592 } else { 593 apm_majver = 1; 594 apm_minver = 0; 595 } 596 ok: 597 aprint_normal("Power Management spec V%d.%d", apm_majver, apm_minver); 598 apm_inited = 1; 599 if (sc->sc_detail & APM_IDLE_SLOWS) { 600 #ifdef DIAGNOSTIC 601 /* not relevant often */ 602 aprint_normal(" (slowidle)"); 603 #endif 604 /* leave apm_do_idle at its user-configured setting */ 605 } else 606 apm_do_idle = 0; 607 #ifdef DIAGNOSTIC 608 if (sc->sc_detail & APM_BIOS_PM_DISABLED) 609 aprint_normal(" (BIOS mgmt disabled)"); 610 if (sc->sc_detail & APM_BIOS_PM_DISENGAGED) 611 aprint_normal(" (BIOS managing devices)"); 612 #endif 613 } 614 615 int 616 apm_match(void) 617 { 618 static int got; 619 return !got++; 620 } 621 622 void 623 apm_attach(struct apm_softc *sc) 624 { 625 u_int numbatts, capflags; 626 627 aprint_normal(": "); 628 629 switch ((APM_MAJOR_VERS(sc->sc_vers) << 8) + APM_MINOR_VERS(sc->sc_vers)) { 630 case 0x0100: 631 apm_v11_enabled = 0; 632 apm_v12_enabled = 0; 633 break; 634 case 0x0101: 635 apm_v12_enabled = 0; 636 /* fall through */ 637 case 0x0102: 638 default: 639 break; 640 } 641 642 apm_set_ver(sc); /* prints version info */ 643 aprint_normal("\n"); 644 if (apm_minver >= 2) 645 (*sc->sc_ops->aa_get_capabilities)(sc->sc_cookie, &numbatts, 646 &capflags); 647 648 /* 649 * enable power management 650 */ 651 (*sc->sc_ops->aa_enable)(sc->sc_cookie, 1); 652 653 if (sc->sc_ops->aa_cpu_busy) 654 (*sc->sc_ops->aa_cpu_busy)(sc->sc_cookie); 655 656 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 657 658 /* Initial state is `resumed'. */ 659 sc->sc_power_state = PWR_RESUME; 660 selinit(&sc->sc_rsel); 661 selinit(&sc->sc_xsel); 662 663 /* Do an initial check. */ 664 apm_periodic_check(sc); 665 666 /* 667 * Create a kernel thread to periodically check for APM events, 668 * and notify other subsystems when they occur. 669 */ 670 if (kthread_create(PRI_NONE, 0, NULL, apm_thread, sc, 671 &sc->sc_thread, "%s", device_xname(sc->sc_dev)) != 0) { 672 /* 673 * We were unable to create the APM thread; bail out. 674 */ 675 if (sc->sc_ops->aa_disconnect) 676 (*sc->sc_ops->aa_disconnect)(sc->sc_cookie); 677 aprint_error_dev(sc->sc_dev, "unable to create thread, " 678 "kernel APM support disabled\n"); 679 } 680 681 if (!pmf_device_register(sc->sc_dev, NULL, NULL)) 682 aprint_error_dev(sc->sc_dev, "couldn't establish power handler\n"); 683 } 684 685 void 686 apm_thread(void *arg) 687 { 688 struct apm_softc *apmsc = arg; 689 690 /* 691 * Loop forever, doing a periodic check for APM events. 692 */ 693 for (;;) { 694 APM_LOCK(apmsc); 695 apm_periodic_check(apmsc); 696 APM_UNLOCK(apmsc); 697 (void) tsleep(apmsc, PWAIT, "apmev", (8 * hz) / 7); 698 } 699 } 700 701 int 702 apmopen(dev_t dev, int flag, int mode, struct lwp *l) 703 { 704 int ctl = APM(dev); 705 int error = 0; 706 struct apm_softc *sc; 707 708 sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 709 if (!sc) 710 return ENXIO; 711 712 if (!apm_inited) 713 return ENXIO; 714 715 DPRINTF(APMDEBUG_DEVICE, 716 ("apmopen: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 717 718 APM_LOCK(sc); 719 switch (ctl) { 720 case APM_CTL: 721 if (!(flag & FWRITE)) { 722 error = EINVAL; 723 break; 724 } 725 if (sc->sc_flags & SCFLAG_OWRITE) { 726 error = EBUSY; 727 break; 728 } 729 sc->sc_flags |= SCFLAG_OWRITE; 730 break; 731 case APM_NORMAL: 732 if (!(flag & FREAD) || (flag & FWRITE)) { 733 error = EINVAL; 734 break; 735 } 736 sc->sc_flags |= SCFLAG_OREAD; 737 break; 738 default: 739 error = ENXIO; 740 break; 741 } 742 APM_UNLOCK(sc); 743 744 return (error); 745 } 746 747 int 748 apmclose(dev_t dev, int flag, int mode, 749 struct lwp *l) 750 { 751 struct apm_softc *sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 752 int ctl = APM(dev); 753 754 DPRINTF(APMDEBUG_DEVICE, 755 ("apmclose: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 756 757 APM_LOCK(sc); 758 switch (ctl) { 759 case APM_CTL: 760 sc->sc_flags &= ~SCFLAG_OWRITE; 761 break; 762 case APM_NORMAL: 763 sc->sc_flags &= ~SCFLAG_OREAD; 764 break; 765 } 766 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 767 sc->sc_event_count = 0; 768 sc->sc_event_ptr = 0; 769 } 770 APM_UNLOCK(sc); 771 return 0; 772 } 773 774 int 775 apmioctl(dev_t dev, u_long cmd, void *data, int flag, 776 struct lwp *l) 777 { 778 struct apm_softc *sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 779 struct apm_power_info *powerp; 780 struct apm_event_info *evp; 781 #if 0 782 struct apm_ctl *actl; 783 #endif 784 int i, error = 0; 785 int batt_flags; 786 struct apm_ctl *actl; 787 788 APM_LOCK(sc); 789 switch (cmd) { 790 case APM_IOC_STANDBY: 791 if (!apm_do_standby) { 792 error = EOPNOTSUPP; 793 break; 794 } 795 796 if ((flag & FWRITE) == 0) { 797 error = EBADF; 798 break; 799 } 800 apm_userstandbys++; 801 break; 802 803 case APM_IOC_DEV_CTL: 804 actl = (struct apm_ctl *)data; 805 if ((flag & FWRITE) == 0) { 806 error = EBADF; 807 break; 808 } 809 #if 0 810 apm_get_powstate(actl->dev); /* XXX */ 811 #endif 812 error = (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, actl->dev, 813 actl->mode); 814 apm_suspends++; 815 break; 816 817 case APM_IOC_SUSPEND: 818 if ((flag & FWRITE) == 0) { 819 error = EBADF; 820 break; 821 } 822 apm_suspends++; 823 break; 824 825 case APM_IOC_NEXTEVENT: 826 if (!sc->sc_event_count) 827 error = EAGAIN; 828 else { 829 evp = (struct apm_event_info *)data; 830 i = sc->sc_event_ptr + APM_NEVENTS - sc->sc_event_count; 831 i %= APM_NEVENTS; 832 *evp = sc->sc_event_list[i]; 833 sc->sc_event_count--; 834 } 835 break; 836 837 case OAPM_IOC_GETPOWER: 838 case APM_IOC_GETPOWER: 839 powerp = (struct apm_power_info *)data; 840 if ((error = (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, 841 powerp)) != 0) { 842 apm_perror("ioctl get power status", error); 843 error = EIO; 844 break; 845 } 846 switch (apm_minver) { 847 case 0: 848 break; 849 case 1: 850 default: 851 batt_flags = powerp->battery_flags; 852 powerp->battery_state = APM_BATT_UNKNOWN; 853 if (batt_flags & APM_BATT_FLAG_HIGH) 854 powerp->battery_state = APM_BATT_HIGH; 855 else if (batt_flags & APM_BATT_FLAG_LOW) 856 powerp->battery_state = APM_BATT_LOW; 857 else if (batt_flags & APM_BATT_FLAG_CRITICAL) 858 powerp->battery_state = APM_BATT_CRITICAL; 859 else if (batt_flags & APM_BATT_FLAG_CHARGING) 860 powerp->battery_state = APM_BATT_CHARGING; 861 else if (batt_flags & APM_BATT_FLAG_NO_SYSTEM_BATTERY) 862 powerp->battery_state = APM_BATT_ABSENT; 863 break; 864 } 865 break; 866 867 default: 868 error = ENOTTY; 869 } 870 APM_UNLOCK(sc); 871 872 return (error); 873 } 874 875 int 876 apmpoll(dev_t dev, int events, struct lwp *l) 877 { 878 struct apm_softc *sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 879 int revents = 0; 880 881 APM_LOCK(sc); 882 if (events & (POLLIN | POLLRDNORM)) { 883 if (sc->sc_event_count) 884 revents |= events & (POLLIN | POLLRDNORM); 885 else 886 selrecord(l, &sc->sc_rsel); 887 } 888 APM_UNLOCK(sc); 889 890 return (revents); 891 } 892 893 static void 894 filt_apmrdetach(struct knote *kn) 895 { 896 struct apm_softc *sc = kn->kn_hook; 897 898 APM_LOCK(sc); 899 SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); 900 APM_UNLOCK(sc); 901 } 902 903 static int 904 filt_apmread(struct knote *kn, long hint) 905 { 906 struct apm_softc *sc = kn->kn_hook; 907 908 kn->kn_data = sc->sc_event_count; 909 return (kn->kn_data > 0); 910 } 911 912 static const struct filterops apmread_filtops = 913 { 1, NULL, filt_apmrdetach, filt_apmread }; 914 915 int 916 apmkqfilter(dev_t dev, struct knote *kn) 917 { 918 struct apm_softc *sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 919 struct klist *klist; 920 921 switch (kn->kn_filter) { 922 case EVFILT_READ: 923 klist = &sc->sc_rsel.sel_klist; 924 kn->kn_fop = &apmread_filtops; 925 break; 926 927 default: 928 return (EINVAL); 929 } 930 931 kn->kn_hook = sc; 932 933 APM_LOCK(sc); 934 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 935 APM_UNLOCK(sc); 936 937 return (0); 938 } 939
Indexes created Tue Oct 07 11:09:55 GMT 2025