apm.c revision 1.27.12.1
1 /* $NetBSD: apm.c,v 1.27.12.1 2012/11/20 03:01:59 tls 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 1.27.12.1 2012/11/20 03:01:59 tls Exp $"); 37 38 #include "opt_apm.h" 39 40 #if defined(DEBUG) && !defined(APMDEBUG) 41 #define APMDEBUG 42 #endif 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/signalvar.h> 47 #include <sys/kernel.h> 48 #include <sys/proc.h> 49 #include <sys/kthread.h> 50 #include <sys/malloc.h> 51 #include <sys/device.h> 52 #include <sys/fcntl.h> 53 #include <sys/ioctl.h> 54 #include <sys/select.h> 55 #include <sys/poll.h> 56 #include <sys/conf.h> 57 58 #include <dev/apm/apmvar.h> 59 60 #ifdef APMDEBUG 61 #define DPRINTF(f, x) do { if (apmdebug & (f)) printf x; } while (0) 62 63 64 #ifdef APMDEBUG_VALUE 65 int apmdebug = APMDEBUG_VALUE; 66 #else 67 int apmdebug = 0; 68 #endif /* APMDEBUG_VALUE */ 69 70 #else 71 #define DPRINTF(f, x) /**/ 72 #endif /* APMDEBUG */ 73 74 #define SCFLAG_OREAD 0x0000001 75 #define SCFLAG_OWRITE 0x0000002 76 #define SCFLAG_OPEN (SCFLAG_OREAD|SCFLAG_OWRITE) 77 78 #define APMUNIT(dev) (minor(dev)&0xf0) 79 #define APM(dev) (minor(dev)&0x0f) 80 #define APM_NORMAL 0 81 #define APM_CTL 8 82 83 /* 84 * A brief note on the locking protocol: it's very simple; we 85 * assert an exclusive lock any time thread context enters the 86 * APM module. This is both the APM thread itself, as well as 87 * user context. 88 */ 89 #define APM_LOCK(apmsc) \ 90 (void) mutex_enter(&(apmsc)->sc_lock) 91 #define APM_UNLOCK(apmsc) \ 92 (void) mutex_exit(&(apmsc)->sc_lock) 93 94 static void apm_event_handle(struct apm_softc *, u_int, u_int); 95 static void apm_periodic_check(struct apm_softc *); 96 static void apm_thread(void *); 97 static void apm_perror(const char *, int, ...) 98 __attribute__((__format__(__printf__,1,3))); 99 #ifdef APM_POWER_PRINT 100 static void apm_power_print(struct apm_softc *, struct apm_power_info *); 101 #endif 102 static int apm_record_event(struct apm_softc *, u_int); 103 static void apm_set_ver(struct apm_softc *); 104 static void apm_standby(struct apm_softc *); 105 static void apm_suspend(struct apm_softc *); 106 static void apm_resume(struct apm_softc *, u_int, u_int); 107 108 extern struct cfdriver apm_cd; 109 110 dev_type_open(apmopen); 111 dev_type_close(apmclose); 112 dev_type_ioctl(apmioctl); 113 dev_type_poll(apmpoll); 114 dev_type_kqfilter(apmkqfilter); 115 116 const struct cdevsw apm_cdevsw = { 117 apmopen, apmclose, noread, nowrite, apmioctl, 118 nostop, notty, apmpoll, nommap, apmkqfilter, D_OTHER, 119 }; 120 121 /* configurable variables */ 122 #ifdef APM_NO_STANDBY 123 int apm_do_standby = 0; 124 #else 125 int apm_do_standby = 1; 126 #endif 127 #ifdef APM_V10_ONLY 128 int apm_v11_enabled = 0; 129 #else 130 int apm_v11_enabled = 1; 131 #endif 132 #ifdef APM_NO_V12 133 int apm_v12_enabled = 0; 134 #else 135 int apm_v12_enabled = 1; 136 #endif 137 138 /* variables used during operation (XXX cgd) */ 139 u_char apm_majver, apm_minver; 140 int apm_inited; 141 int apm_standbys, apm_userstandbys, apm_suspends, apm_battlow; 142 int apm_damn_fool_bios, apm_op_inprog; 143 int apm_evindex; 144 145 static int apm_spl; /* saved spl while suspended */ 146 147 const char * 148 apm_strerror(int code) 149 { 150 switch (code) { 151 case APM_ERR_PM_DISABLED: 152 return ("power management disabled"); 153 case APM_ERR_REALALREADY: 154 return ("real mode interface already connected"); 155 case APM_ERR_NOTCONN: 156 return ("interface not connected"); 157 case APM_ERR_16ALREADY: 158 return ("16-bit interface already connected"); 159 case APM_ERR_16NOTSUPP: 160 return ("16-bit interface not supported"); 161 case APM_ERR_32ALREADY: 162 return ("32-bit interface already connected"); 163 case APM_ERR_32NOTSUPP: 164 return ("32-bit interface not supported"); 165 case APM_ERR_UNRECOG_DEV: 166 return ("unrecognized device ID"); 167 case APM_ERR_ERANGE: 168 return ("parameter out of range"); 169 case APM_ERR_NOTENGAGED: 170 return ("interface not engaged"); 171 case APM_ERR_UNABLE: 172 return ("unable to enter requested state"); 173 case APM_ERR_NOEVENTS: 174 return ("no pending events"); 175 case APM_ERR_NOT_PRESENT: 176 return ("no APM present"); 177 default: 178 return ("unknown error code"); 179 } 180 } 181 182 static void 183 apm_perror(const char *str, int errinfo, ...) /* XXX cgd */ 184 { 185 va_list ap; 186 187 printf("APM "); 188 189 va_start(ap, errinfo); 190 vprintf(str, ap); /* XXX cgd */ 191 va_end(ap); 192 193 printf(": %s\n", apm_strerror(errinfo)); 194 } 195 196 #ifdef APM_POWER_PRINT 197 static void 198 apm_power_print(struct apm_softc *sc, struct apm_power_info *pi) 199 { 200 201 if (pi->battery_life != APM_BATT_LIFE_UNKNOWN) { 202 aprint_normal_dev(sc->sc_dev, 203 "battery life expectancy: %d%%\n", 204 pi->battery_life); 205 } 206 aprint_normal_dev(sc->sc_dev, "A/C state: "); 207 switch (pi->ac_state) { 208 case APM_AC_OFF: 209 printf("off\n"); 210 break; 211 case APM_AC_ON: 212 printf("on\n"); 213 break; 214 case APM_AC_BACKUP: 215 printf("backup power\n"); 216 break; 217 default: 218 case APM_AC_UNKNOWN: 219 printf("unknown\n"); 220 break; 221 } 222 aprint_normal_dev(sc->sc_dev, "battery charge state:"); 223 if (apm_minver == 0) 224 switch (pi->battery_state) { 225 case APM_BATT_HIGH: 226 printf("high\n"); 227 break; 228 case APM_BATT_LOW: 229 printf("low\n"); 230 break; 231 case APM_BATT_CRITICAL: 232 printf("critical\n"); 233 break; 234 case APM_BATT_CHARGING: 235 printf("charging\n"); 236 break; 237 case APM_BATT_UNKNOWN: 238 printf("unknown\n"); 239 break; 240 default: 241 printf("undecoded state %x\n", pi->battery_state); 242 break; 243 } 244 else if (apm_minver >= 1) { 245 if (pi->battery_flags & APM_BATT_FLAG_NO_SYSTEM_BATTERY) 246 printf(" no battery"); 247 else { 248 if (pi->battery_flags & APM_BATT_FLAG_HIGH) 249 printf(" high"); 250 if (pi->battery_flags & APM_BATT_FLAG_LOW) 251 printf(" low"); 252 if (pi->battery_flags & APM_BATT_FLAG_CRITICAL) 253 printf(" critical"); 254 if (pi->battery_flags & APM_BATT_FLAG_CHARGING) 255 printf(" charging"); 256 } 257 printf("\n"); 258 if (pi->minutes_valid) { 259 aprint_normal_dev(sc->sc_dev, "estimated "); 260 if (pi->minutes_left / 60) 261 printf("%dh ", pi->minutes_left / 60); 262 printf("%dm\n", pi->minutes_left % 60); 263 } 264 } 265 return; 266 } 267 #endif 268 269 static void 270 apm_suspend(struct apm_softc *sc) 271 { 272 int error; 273 274 if (sc->sc_power_state == PWR_SUSPEND) { 275 #ifdef APMDEBUG 276 aprint_debug_dev(sc->sc_dev, 277 "apm_suspend: already suspended?\n"); 278 #endif 279 return; 280 } 281 sc->sc_power_state = PWR_SUSPEND; 282 283 if (!(sc->sc_hwflags & APM_F_DONT_RUN_HOOKS)) { 284 pmf_system_suspend(PMF_Q_NONE); 285 apm_spl = splhigh(); 286 } 287 288 error = (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, APM_DEV_ALLDEVS, 289 APM_SYS_SUSPEND); 290 291 if (error) 292 apm_resume(sc, 0, 0); 293 else 294 apm_resume(sc, APM_SYS_STANDBY_RESUME, 0); 295 } 296 297 static void 298 apm_standby(struct apm_softc *sc) 299 { 300 int error; 301 302 if (sc->sc_power_state == PWR_STANDBY) { 303 #ifdef APMDEBUG 304 aprint_debug_dev(sc->sc_dev, 305 "apm_standby: already standing by?\n"); 306 #endif 307 return; 308 } 309 sc->sc_power_state = PWR_STANDBY; 310 311 if (!(sc->sc_hwflags & APM_F_DONT_RUN_HOOKS)) { 312 pmf_system_suspend(PMF_Q_NONE); 313 apm_spl = splhigh(); 314 } 315 error = (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, APM_DEV_ALLDEVS, 316 APM_SYS_STANDBY); 317 if (error) 318 apm_resume(sc, 0, 0); 319 else 320 apm_resume(sc, APM_SYS_STANDBY_RESUME, 0); 321 } 322 323 static void 324 apm_resume(struct apm_softc *sc, u_int event_type, u_int event_info) 325 { 326 if (sc->sc_power_state == PWR_RESUME) { 327 #ifdef APMDEBUG 328 aprint_debug_dev(sc->sc_dev, "apm_resume: already running?\n"); 329 #endif 330 return; 331 } 332 sc->sc_power_state = PWR_RESUME; 333 334 #ifdef TIMER_FREQ 335 /* 336 * Some system requires its clock to be initialized after hybernation. 337 */ 338 initrtclock(TIMER_FREQ); 339 #endif 340 341 inittodr(time_second); 342 if (!(sc->sc_hwflags & APM_F_DONT_RUN_HOOKS)) { 343 splx(apm_spl); 344 pmf_system_resume(PMF_Q_NONE); 345 } 346 347 apm_record_event(sc, event_type); 348 } 349 350 /* 351 * return 0 if the user will notice and handle the event, 352 * return 1 if the kernel driver should do so. 353 */ 354 static int 355 apm_record_event(struct apm_softc *sc, u_int event_type) 356 { 357 struct apm_event_info *evp; 358 359 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 360 return 1; /* no user waiting */ 361 if (sc->sc_event_count == APM_NEVENTS) 362 return 1; /* overflow */ 363 evp = &sc->sc_event_list[sc->sc_event_ptr]; 364 sc->sc_event_count++; 365 sc->sc_event_ptr++; 366 sc->sc_event_ptr %= APM_NEVENTS; 367 evp->type = event_type; 368 evp->index = ++apm_evindex; 369 selnotify(&sc->sc_rsel, 0, 0); 370 return (sc->sc_flags & SCFLAG_OWRITE) ? 0 : 1; /* user may handle */ 371 } 372 373 static void 374 apm_event_handle(struct apm_softc *sc, u_int event_code, u_int event_info) 375 { 376 int error; 377 const char *code; 378 struct apm_power_info pi; 379 380 switch (event_code) { 381 case APM_USER_STANDBY_REQ: 382 DPRINTF(APMDEBUG_EVENTS, ("apmev: user standby request\n")); 383 if (apm_do_standby) { 384 if (apm_op_inprog == 0 && apm_record_event(sc, event_code)) 385 apm_userstandbys++; 386 apm_op_inprog++; 387 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 388 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 389 } else { 390 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 391 APM_DEV_ALLDEVS, APM_LASTREQ_REJECTED); 392 /* in case BIOS hates being spurned */ 393 (*sc->sc_ops->aa_enable)(sc->sc_cookie, 1); 394 } 395 break; 396 397 case APM_STANDBY_REQ: 398 DPRINTF(APMDEBUG_EVENTS, ("apmev: system standby request\n")); 399 if (apm_op_inprog) { 400 DPRINTF(APMDEBUG_EVENTS | APMDEBUG_ANOM, 401 ("damn fool BIOS did not wait for answer\n")); 402 /* just give up the fight */ 403 apm_damn_fool_bios = 1; 404 } 405 if (apm_do_standby) { 406 if (apm_op_inprog == 0 && 407 apm_record_event(sc, event_code)) 408 apm_standbys++; 409 apm_op_inprog++; 410 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 411 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 412 } else { 413 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 414 APM_DEV_ALLDEVS, APM_LASTREQ_REJECTED); 415 /* in case BIOS hates being spurned */ 416 (*sc->sc_ops->aa_enable)(sc->sc_cookie, 1); 417 } 418 break; 419 420 case APM_USER_SUSPEND_REQ: 421 DPRINTF(APMDEBUG_EVENTS, ("apmev: user suspend request\n")); 422 if (apm_op_inprog == 0 && apm_record_event(sc, event_code)) 423 apm_suspends++; 424 apm_op_inprog++; 425 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 426 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 427 break; 428 429 case APM_SUSPEND_REQ: 430 DPRINTF(APMDEBUG_EVENTS, ("apmev: system suspend request\n")); 431 if (apm_op_inprog) { 432 DPRINTF(APMDEBUG_EVENTS | APMDEBUG_ANOM, 433 ("damn fool BIOS did not wait for answer\n")); 434 /* just give up the fight */ 435 apm_damn_fool_bios = 1; 436 } 437 if (apm_op_inprog == 0 && apm_record_event(sc, event_code)) 438 apm_suspends++; 439 apm_op_inprog++; 440 (void)(*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, 441 APM_DEV_ALLDEVS, APM_LASTREQ_INPROG); 442 break; 443 444 case APM_POWER_CHANGE: 445 DPRINTF(APMDEBUG_EVENTS, ("apmev: power status change\n")); 446 error = (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, &pi); 447 #ifdef APM_POWER_PRINT 448 /* only print if nobody is catching events. */ 449 if (error == 0 && 450 (sc->sc_flags & (SCFLAG_OREAD|SCFLAG_OWRITE)) == 0) 451 apm_power_print(sc, &pi); 452 #endif 453 apm_record_event(sc, event_code); 454 break; 455 456 case APM_NORMAL_RESUME: 457 DPRINTF(APMDEBUG_EVENTS, ("apmev: resume system\n")); 458 apm_resume(sc, event_code, event_info); 459 break; 460 461 case APM_CRIT_RESUME: 462 DPRINTF(APMDEBUG_EVENTS, ("apmev: critical resume system")); 463 apm_resume(sc, event_code, event_info); 464 break; 465 466 case APM_SYS_STANDBY_RESUME: 467 DPRINTF(APMDEBUG_EVENTS, ("apmev: system standby resume\n")); 468 apm_resume(sc, event_code, event_info); 469 break; 470 471 case APM_UPDATE_TIME: 472 DPRINTF(APMDEBUG_EVENTS, ("apmev: update time\n")); 473 apm_resume(sc, event_code, event_info); 474 break; 475 476 case APM_CRIT_SUSPEND_REQ: 477 DPRINTF(APMDEBUG_EVENTS, ("apmev: critical system suspend\n")); 478 apm_record_event(sc, event_code); 479 apm_suspend(sc); 480 break; 481 482 case APM_BATTERY_LOW: 483 DPRINTF(APMDEBUG_EVENTS, ("apmev: battery low\n")); 484 apm_battlow++; 485 apm_record_event(sc, event_code); 486 break; 487 488 case APM_CAP_CHANGE: 489 DPRINTF(APMDEBUG_EVENTS, ("apmev: capability change\n")); 490 if (apm_minver < 2) { 491 DPRINTF(APMDEBUG_EVENTS, ("apm: unexpected event\n")); 492 } else { 493 u_int numbatts, capflags; 494 (*sc->sc_ops->aa_get_capabilities)(sc->sc_cookie, 495 &numbatts, &capflags); 496 (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, &pi); 497 } 498 break; 499 500 default: 501 switch (event_code >> 8) { 502 case 0: 503 code = "reserved system"; 504 break; 505 case 1: 506 code = "reserved device"; 507 break; 508 case 2: 509 code = "OEM defined"; 510 break; 511 default: 512 code = "reserved"; 513 break; 514 } 515 printf("APM: %s event code %x\n", code, event_code); 516 } 517 } 518 519 static void 520 apm_periodic_check(struct apm_softc *sc) 521 { 522 int error; 523 u_int event_code, event_info; 524 525 526 /* 527 * tell the BIOS we're working on it, if asked to do a 528 * suspend/standby 529 */ 530 if (apm_op_inprog) 531 (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, APM_DEV_ALLDEVS, 532 APM_LASTREQ_INPROG); 533 534 while ((error = (*sc->sc_ops->aa_get_event)(sc->sc_cookie, &event_code, 535 &event_info)) == 0 && !apm_damn_fool_bios) 536 apm_event_handle(sc, event_code, event_info); 537 538 if (error != APM_ERR_NOEVENTS) 539 apm_perror("get event", error); 540 if (apm_suspends) { 541 apm_op_inprog = 0; 542 apm_suspend(sc); 543 } else if (apm_standbys || apm_userstandbys) { 544 apm_op_inprog = 0; 545 apm_standby(sc); 546 } 547 apm_suspends = apm_standbys = apm_battlow = apm_userstandbys = 0; 548 apm_damn_fool_bios = 0; 549 } 550 551 static void 552 apm_set_ver(struct apm_softc *sc) 553 { 554 555 if (apm_v12_enabled && 556 APM_MAJOR_VERS(sc->sc_vers) == 1 && 557 APM_MINOR_VERS(sc->sc_vers) == 2) { 558 apm_majver = 1; 559 apm_minver = 2; 560 goto ok; 561 } 562 563 if (apm_v11_enabled && 564 APM_MAJOR_VERS(sc->sc_vers) == 1 && 565 APM_MINOR_VERS(sc->sc_vers) == 1) { 566 apm_majver = 1; 567 apm_minver = 1; 568 } else { 569 apm_majver = 1; 570 apm_minver = 0; 571 } 572 ok: 573 aprint_normal("Power Management spec V%d.%d", apm_majver, apm_minver); 574 apm_inited = 1; 575 } 576 577 int 578 apm_match(void) 579 { 580 static int got; 581 return !got++; 582 } 583 584 void 585 apm_attach(struct apm_softc *sc) 586 { 587 u_int numbatts, capflags; 588 589 aprint_normal(": "); 590 591 switch ((APM_MAJOR_VERS(sc->sc_vers) << 8) + APM_MINOR_VERS(sc->sc_vers)) { 592 case 0x0100: 593 apm_v11_enabled = 0; 594 apm_v12_enabled = 0; 595 break; 596 case 0x0101: 597 apm_v12_enabled = 0; 598 /* fall through */ 599 case 0x0102: 600 default: 601 break; 602 } 603 604 apm_set_ver(sc); /* prints version info */ 605 aprint_normal("\n"); 606 if (apm_minver >= 2) 607 (*sc->sc_ops->aa_get_capabilities)(sc->sc_cookie, &numbatts, 608 &capflags); 609 610 /* 611 * enable power management 612 */ 613 (*sc->sc_ops->aa_enable)(sc->sc_cookie, 1); 614 615 if (sc->sc_ops->aa_cpu_busy) 616 (*sc->sc_ops->aa_cpu_busy)(sc->sc_cookie); 617 618 mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_NONE); 619 620 /* Initial state is `resumed'. */ 621 sc->sc_power_state = PWR_RESUME; 622 selinit(&sc->sc_rsel); 623 selinit(&sc->sc_xsel); 624 625 /* Do an initial check. */ 626 apm_periodic_check(sc); 627 628 /* 629 * Create a kernel thread to periodically check for APM events, 630 * and notify other subsystems when they occur. 631 */ 632 if (kthread_create(PRI_NONE, 0, NULL, apm_thread, sc, 633 &sc->sc_thread, "%s", device_xname(sc->sc_dev)) != 0) { 634 /* 635 * We were unable to create the APM thread; bail out. 636 */ 637 if (sc->sc_ops->aa_disconnect) 638 (*sc->sc_ops->aa_disconnect)(sc->sc_cookie); 639 aprint_error_dev(sc->sc_dev, "unable to create thread, " 640 "kernel APM support disabled\n"); 641 } 642 643 if (!pmf_device_register(sc->sc_dev, NULL, NULL)) 644 aprint_error_dev(sc->sc_dev, "couldn't establish power handler\n"); 645 } 646 647 void 648 apm_thread(void *arg) 649 { 650 struct apm_softc *apmsc = arg; 651 652 /* 653 * Loop forever, doing a periodic check for APM events. 654 */ 655 for (;;) { 656 APM_LOCK(apmsc); 657 apm_periodic_check(apmsc); 658 APM_UNLOCK(apmsc); 659 (void) tsleep(apmsc, PWAIT, "apmev", (8 * hz) / 7); 660 } 661 } 662 663 int 664 apmopen(dev_t dev, int flag, int mode, struct lwp *l) 665 { 666 int ctl = APM(dev); 667 int error = 0; 668 struct apm_softc *sc; 669 670 sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 671 if (!sc) 672 return ENXIO; 673 674 if (!apm_inited) 675 return ENXIO; 676 677 DPRINTF(APMDEBUG_DEVICE, 678 ("apmopen: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 679 680 APM_LOCK(sc); 681 switch (ctl) { 682 case APM_CTL: 683 if (!(flag & FWRITE)) { 684 error = EINVAL; 685 break; 686 } 687 if (sc->sc_flags & SCFLAG_OWRITE) { 688 error = EBUSY; 689 break; 690 } 691 sc->sc_flags |= SCFLAG_OWRITE; 692 break; 693 case APM_NORMAL: 694 if (!(flag & FREAD) || (flag & FWRITE)) { 695 error = EINVAL; 696 break; 697 } 698 sc->sc_flags |= SCFLAG_OREAD; 699 break; 700 default: 701 error = ENXIO; 702 break; 703 } 704 APM_UNLOCK(sc); 705 706 return (error); 707 } 708 709 int 710 apmclose(dev_t dev, int flag, int mode, 711 struct lwp *l) 712 { 713 struct apm_softc *sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 714 int ctl = APM(dev); 715 716 DPRINTF(APMDEBUG_DEVICE, 717 ("apmclose: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 718 719 APM_LOCK(sc); 720 switch (ctl) { 721 case APM_CTL: 722 sc->sc_flags &= ~SCFLAG_OWRITE; 723 break; 724 case APM_NORMAL: 725 sc->sc_flags &= ~SCFLAG_OREAD; 726 break; 727 } 728 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 729 sc->sc_event_count = 0; 730 sc->sc_event_ptr = 0; 731 } 732 APM_UNLOCK(sc); 733 return 0; 734 } 735 736 int 737 apmioctl(dev_t dev, u_long cmd, void *data, int flag, 738 struct lwp *l) 739 { 740 struct apm_softc *sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 741 struct apm_power_info *powerp; 742 struct apm_event_info *evp; 743 #if 0 744 struct apm_ctl *actl; 745 #endif 746 int i, error = 0; 747 int batt_flags; 748 struct apm_ctl *actl; 749 750 APM_LOCK(sc); 751 switch (cmd) { 752 case APM_IOC_STANDBY: 753 if (!apm_do_standby) { 754 error = EOPNOTSUPP; 755 break; 756 } 757 758 if ((flag & FWRITE) == 0) { 759 error = EBADF; 760 break; 761 } 762 apm_userstandbys++; 763 break; 764 765 case APM_IOC_DEV_CTL: 766 actl = (struct apm_ctl *)data; 767 if ((flag & FWRITE) == 0) { 768 error = EBADF; 769 break; 770 } 771 #if 0 772 apm_get_powstate(actl->dev); /* XXX */ 773 #endif 774 error = (*sc->sc_ops->aa_set_powstate)(sc->sc_cookie, actl->dev, 775 actl->mode); 776 apm_suspends++; 777 break; 778 779 case APM_IOC_SUSPEND: 780 if ((flag & FWRITE) == 0) { 781 error = EBADF; 782 break; 783 } 784 apm_suspends++; 785 break; 786 787 case APM_IOC_NEXTEVENT: 788 if (!sc->sc_event_count) 789 error = EAGAIN; 790 else { 791 evp = (struct apm_event_info *)data; 792 i = sc->sc_event_ptr + APM_NEVENTS - sc->sc_event_count; 793 i %= APM_NEVENTS; 794 *evp = sc->sc_event_list[i]; 795 sc->sc_event_count--; 796 } 797 break; 798 799 case OAPM_IOC_GETPOWER: 800 case APM_IOC_GETPOWER: 801 powerp = (struct apm_power_info *)data; 802 if ((error = (*sc->sc_ops->aa_get_powstat)(sc->sc_cookie, 0, 803 powerp)) != 0) { 804 apm_perror("ioctl get power status", error); 805 error = EIO; 806 break; 807 } 808 switch (apm_minver) { 809 case 0: 810 break; 811 case 1: 812 default: 813 batt_flags = powerp->battery_flags; 814 powerp->battery_state = APM_BATT_UNKNOWN; 815 if (batt_flags & APM_BATT_FLAG_HIGH) 816 powerp->battery_state = APM_BATT_HIGH; 817 else if (batt_flags & APM_BATT_FLAG_LOW) 818 powerp->battery_state = APM_BATT_LOW; 819 else if (batt_flags & APM_BATT_FLAG_CRITICAL) 820 powerp->battery_state = APM_BATT_CRITICAL; 821 else if (batt_flags & APM_BATT_FLAG_CHARGING) 822 powerp->battery_state = APM_BATT_CHARGING; 823 else if (batt_flags & APM_BATT_FLAG_NO_SYSTEM_BATTERY) 824 powerp->battery_state = APM_BATT_ABSENT; 825 break; 826 } 827 break; 828 829 default: 830 error = ENOTTY; 831 } 832 APM_UNLOCK(sc); 833 834 return (error); 835 } 836 837 int 838 apmpoll(dev_t dev, int events, struct lwp *l) 839 { 840 struct apm_softc *sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 841 int revents = 0; 842 843 APM_LOCK(sc); 844 if (events & (POLLIN | POLLRDNORM)) { 845 if (sc->sc_event_count) 846 revents |= events & (POLLIN | POLLRDNORM); 847 else 848 selrecord(l, &sc->sc_rsel); 849 } 850 APM_UNLOCK(sc); 851 852 return (revents); 853 } 854 855 static void 856 filt_apmrdetach(struct knote *kn) 857 { 858 struct apm_softc *sc = kn->kn_hook; 859 860 APM_LOCK(sc); 861 SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); 862 APM_UNLOCK(sc); 863 } 864 865 static int 866 filt_apmread(struct knote *kn, long hint) 867 { 868 struct apm_softc *sc = kn->kn_hook; 869 870 kn->kn_data = sc->sc_event_count; 871 return (kn->kn_data > 0); 872 } 873 874 static const struct filterops apmread_filtops = 875 { 1, NULL, filt_apmrdetach, filt_apmread }; 876 877 int 878 apmkqfilter(dev_t dev, struct knote *kn) 879 { 880 struct apm_softc *sc = device_lookup_private(&apm_cd, APMUNIT(dev)); 881 struct klist *klist; 882 883 switch (kn->kn_filter) { 884 case EVFILT_READ: 885 klist = &sc->sc_rsel.sel_klist; 886 kn->kn_fop = &apmread_filtops; 887 break; 888 889 default: 890 return (EINVAL); 891 } 892 893 kn->kn_hook = sc; 894 895 APM_LOCK(sc); 896 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 897 APM_UNLOCK(sc); 898 899 return (0); 900 } 901
Indexes created Tue Oct 07 11:09:55 GMT 2025