apmdev.c revision 1.18.4.1
1 /* $NetBSD: apmdev.c,v 1.18.4.1 2008/06/18 16:33:09 simonb 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 1.18.4.1 2008/06/18 16:33:09 simonb Exp $"); 37 38 #ifdef _KERNEL_OPT 39 #include "opt_apmdev.h" 40 #endif 41 42 #ifdef APM_NOIDLE 43 #error APM_NOIDLE option deprecated; use APM_NO_IDLE instead 44 #endif 45 46 #if defined(DEBUG) && !defined(APMDEBUG) 47 #define APMDEBUG 48 #endif 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/signalvar.h> 53 #include <sys/kernel.h> 54 #include <sys/proc.h> 55 #include <sys/kthread.h> 56 #include <sys/mutex.h> 57 #include <sys/user.h> 58 #include <sys/malloc.h> 59 #include <sys/device.h> 60 #include <sys/fcntl.h> 61 #include <sys/ioctl.h> 62 #include <sys/select.h> 63 #include <sys/poll.h> 64 #include <sys/conf.h> 65 66 #include <dev/hpc/apm/apmvar.h> 67 68 #include <machine/stdarg.h> 69 70 #if defined(APMDEBUG) 71 #define DPRINTF(f, x) do { if (apmdebug & (f)) printf x; } while (0) 72 73 #define APMDEBUG_INFO 0x01 74 #define APMDEBUG_APMCALLS 0x02 75 #define APMDEBUG_EVENTS 0x04 76 #define APMDEBUG_PROBE 0x10 77 #define APMDEBUG_ATTACH 0x40 78 #define APMDEBUG_DEVICE 0x20 79 #define APMDEBUG_ANOM 0x40 80 81 #ifdef APMDEBUG_VALUE 82 int apmdebug = APMDEBUG_VALUE; 83 #else 84 int apmdebug = 0; 85 #endif 86 #else 87 #define DPRINTF(f, x) /**/ 88 #endif 89 90 #define APM_NEVENTS 16 91 92 struct apm_softc { 93 struct device sc_dev; 94 struct selinfo sc_rsel; 95 struct selinfo sc_xsel; 96 int sc_flags; 97 int event_count; 98 int event_ptr; 99 int sc_power_state; 100 lwp_t *sc_thread; 101 kmutex_t sc_mutex; 102 struct apm_event_info event_list[APM_NEVENTS]; 103 struct apm_accessops *ops; 104 void *cookie; 105 }; 106 #define SCFLAG_OREAD 0x0000001 107 #define SCFLAG_OWRITE 0x0000002 108 #define SCFLAG_OPEN (SCFLAG_OREAD|SCFLAG_OWRITE) 109 110 #define APMUNIT(dev) (minor(dev)&0xf0) 111 #define APMDEV(dev) (minor(dev)&0x0f) 112 #define APMDEV_NORMAL 0 113 #define APMDEV_CTL 8 114 115 /* 116 * A brief note on the locking protocol: it's very simple; we 117 * assert an exclusive lock any time thread context enters the 118 * APM module. This is both the APM thread itself, as well as 119 * user context. 120 */ 121 #define APM_LOCK(apmsc) mutex_enter(&(apmsc)->sc_mutex) 122 #define APM_UNLOCK(apmsc) mutex_exit(&(apmsc)->sc_mutex) 123 124 static void apmattach(struct device *, struct device *, void *); 125 static int apmmatch(struct device *, struct cfdata *, void *); 126 127 static void apm_event_handle(struct apm_softc *, u_int, u_int); 128 static void apm_periodic_check(struct apm_softc *); 129 static void apm_thread(void *); 130 static void apm_perror(const char *, int, ...) 131 __attribute__((__format__(__printf__,1,3))); 132 #ifdef APM_POWER_PRINT 133 static void apm_power_print(struct apm_softc *, struct apm_power_info *); 134 #endif 135 static int apm_record_event(struct apm_softc *, u_int); 136 static void apm_set_ver(struct apm_softc *, u_long); 137 static void apm_standby(struct apm_softc *); 138 static const char *apm_strerror(int); 139 static void apm_suspend(struct apm_softc *); 140 static void apm_resume(struct apm_softc *, u_int, u_int); 141 142 CFATTACH_DECL(apmdev, sizeof(struct apm_softc), 143 apmmatch, apmattach, NULL, NULL); 144 145 extern struct cfdriver apmdev_cd; 146 147 dev_type_open(apmdevopen); 148 dev_type_close(apmdevclose); 149 dev_type_ioctl(apmdevioctl); 150 dev_type_poll(apmdevpoll); 151 dev_type_kqfilter(apmdevkqfilter); 152 153 const struct cdevsw apmdev_cdevsw = { 154 apmdevopen, apmdevclose, noread, nowrite, apmdevioctl, 155 nostop, notty, apmdevpoll, nommap, apmdevkqfilter, D_OTHER 156 }; 157 158 /* configurable variables */ 159 int apm_bogus_bios = 0; 160 #ifdef APM_DISABLE 161 int apm_enabled = 0; 162 #else 163 int apm_enabled = 1; 164 #endif 165 #ifdef APM_NO_IDLE 166 int apm_do_idle = 0; 167 #else 168 int apm_do_idle = 1; 169 #endif 170 #ifdef APM_NO_STANDBY 171 int apm_do_standby = 0; 172 #else 173 int apm_do_standby = 1; 174 #endif 175 #ifdef APM_V10_ONLY 176 int apm_v11_enabled = 0; 177 #else 178 int apm_v11_enabled = 1; 179 #endif 180 #ifdef APM_NO_V12 181 int apm_v12_enabled = 0; 182 #else 183 int apm_v12_enabled = 1; 184 #endif 185 186 /* variables used during operation (XXX cgd) */ 187 u_char apm_majver, apm_minver; 188 int apm_inited; 189 int apm_standbys, apm_userstandbys, apm_suspends, apm_battlow; 190 int apm_damn_fool_bios, apm_op_inprog; 191 int apm_evindex; 192 193 static int apm_spl; /* saved spl while suspended */ 194 195 static const char * 196 apm_strerror(int code) 197 { 198 switch (code) { 199 case APM_ERR_PM_DISABLED: 200 return ("power management disabled"); 201 case APM_ERR_REALALREADY: 202 return ("real mode interface already connected"); 203 case APM_ERR_NOTCONN: 204 return ("interface not connected"); 205 case APM_ERR_16ALREADY: 206 return ("16-bit interface already connected"); 207 case APM_ERR_16NOTSUPP: 208 return ("16-bit interface not supported"); 209 case APM_ERR_32ALREADY: 210 return ("32-bit interface already connected"); 211 case APM_ERR_32NOTSUPP: 212 return ("32-bit interface not supported"); 213 case APM_ERR_UNRECOG_DEV: 214 return ("unrecognized device ID"); 215 case APM_ERR_ERANGE: 216 return ("parameter out of range"); 217 case APM_ERR_NOTENGAGED: 218 return ("interface not engaged"); 219 case APM_ERR_UNABLE: 220 return ("unable to enter requested state"); 221 case APM_ERR_NOEVENTS: 222 return ("no pending events"); 223 case APM_ERR_NOT_PRESENT: 224 return ("no APM present"); 225 default: 226 return ("unknown error code"); 227 } 228 } 229 230 static void 231 apm_perror(const char *str, int errinfo, ...) /* XXX cgd */ 232 { 233 va_list ap; 234 235 printf("APM "); 236 237 va_start(ap, errinfo); 238 vprintf(str, ap); /* XXX cgd */ 239 va_end(ap); 240 241 printf(": %s\n", apm_strerror(errinfo)); 242 } 243 244 #ifdef APM_POWER_PRINT 245 static void 246 apm_power_print(struct apm_softc *sc, struct apm_power_info *pi) 247 { 248 249 if (pi->battery_life != APM_BATT_LIFE_UNKNOWN) { 250 printf("%s: battery life expectancy: %d%%\n", 251 device_xname(&sc->sc_dev), pi->battery_life); 252 } 253 printf("%s: A/C state: ", device_xname(&sc->sc_dev)); 254 switch (pi->ac_state) { 255 case APM_AC_OFF: 256 printf("off\n"); 257 break; 258 case APM_AC_ON: 259 printf("on\n"); 260 break; 261 case APM_AC_BACKUP: 262 printf("backup power\n"); 263 break; 264 default: 265 case APM_AC_UNKNOWN: 266 printf("unknown\n"); 267 break; 268 } 269 if (apm_major == 1 && apm_minor == 0) { 270 printf("%s: battery charge state:", device_xname(&sc->sc_dev)); 271 switch (pi->battery_state) { 272 case APM_BATT_HIGH: 273 printf("high\n"); 274 break; 275 case APM_BATT_LOW: 276 printf("low\n"); 277 break; 278 case APM_BATT_CRITICAL: 279 printf("critical\n"); 280 break; 281 case APM_BATT_CHARGING: 282 printf("charging\n"); 283 break; 284 case APM_BATT_UNKNOWN: 285 printf("unknown\n"); 286 break; 287 default: 288 printf("undecoded state %x\n", pi->battery_state); 289 break; 290 } 291 } else { 292 if (pi->battery_state&APM_BATT_FLAG_CHARGING) 293 printf("charging "); 294 } 295 if (pi->battery_state&APM_BATT_FLAG_UNKNOWN) 296 printf("unknown\n"); 297 else if (pi->battery_state&APM_BATT_FLAG_CRITICAL) 298 printf("critical\n"); 299 else if (pi->battery_state&APM_BATT_FLAG_LOW) 300 printf("low\n"); 301 else if (pi->battery_state&APM_BATT_FLAG_HIGH) 302 printf("high\n"); 303 } 304 if (pi->minutes_left != 0) { 305 printf("%s: estimated ", device_xname(&sc->sc_dev)); 306 printf("%dh ", pi->minutes_left / 60); 307 } 308 return; 309 } 310 #endif 311 312 static void 313 apm_suspend(struct apm_softc *sc) 314 { 315 316 if (sc->sc_power_state == PWR_SUSPEND) { 317 #ifdef APMDEBUG 318 printf("%s: apm_suspend: already suspended?\n", 319 device_xname(&sc->sc_dev)); 320 #endif 321 return; 322 } 323 sc->sc_power_state = PWR_SUSPEND; 324 325 dopowerhooks(PWR_SOFTSUSPEND); 326 (void) tsleep(sc, PWAIT, "apmsuspend", hz/2); 327 328 apm_spl = splhigh(); 329 330 dopowerhooks(PWR_SUSPEND); 331 332 /* XXX cgd */ 333 (void)sc->ops->set_powstate(sc->cookie, APM_DEV_ALLDEVS, APM_SYS_SUSPEND); 334 } 335 336 static void 337 apm_standby(struct apm_softc *sc) 338 { 339 340 if (sc->sc_power_state == PWR_STANDBY) { 341 #ifdef APMDEBUG 342 printf("%s: apm_standby: already standing by?\n", 343 device_xname(&sc->sc_dev)); 344 #endif 345 return; 346 } 347 sc->sc_power_state = PWR_STANDBY; 348 349 dopowerhooks(PWR_SOFTSTANDBY); 350 (void) tsleep(sc, PWAIT, "apmstandby", hz/2); 351 352 apm_spl = splhigh(); 353 354 dopowerhooks(PWR_STANDBY); 355 /* XXX cgd */ 356 (void)sc->ops->set_powstate(sc->cookie, APM_DEV_ALLDEVS, APM_SYS_STANDBY); 357 } 358 359 static void 360 apm_resume(struct apm_softc *sc, u_int event_type, u_int event_info) 361 { 362 363 if (sc->sc_power_state == PWR_RESUME) { 364 #ifdef APMDEBUG 365 printf("%s: apm_resume: already running?\n", 366 device_xname(&sc->sc_dev)); 367 #endif 368 return; 369 } 370 sc->sc_power_state = PWR_RESUME; 371 372 /* 373 * Some system requires its clock to be initialized after hybernation. 374 */ 375 /* XXX 376 initrtclock(); 377 */ 378 379 inittodr(time_second); 380 dopowerhooks(PWR_RESUME); 381 382 splx(apm_spl); 383 384 dopowerhooks(PWR_SOFTRESUME); 385 386 apm_record_event(sc, event_type); 387 } 388 389 /* 390 * return 0 if the user will notice and handle the event, 391 * return 1 if the kernel driver should do so. 392 */ 393 static int 394 apm_record_event(struct apm_softc *sc, u_int event_type) 395 { 396 struct apm_event_info *evp; 397 398 if ((sc->sc_flags & SCFLAG_OPEN) == 0) 399 return 1; /* no user waiting */ 400 if (sc->event_count == APM_NEVENTS) 401 return 1; /* overflow */ 402 evp = &sc->event_list[sc->event_ptr]; 403 sc->event_count++; 404 sc->event_ptr++; 405 sc->event_ptr %= APM_NEVENTS; 406 evp->type = event_type; 407 evp->index = ++apm_evindex; 408 selnotify(&sc->sc_rsel, 0, 0); 409 return (sc->sc_flags & SCFLAG_OWRITE) ? 0 : 1; /* user may handle */ 410 } 411 412 static void 413 apm_event_handle(struct apm_softc *sc, u_int event_code, u_int event_info) 414 { 415 int error; 416 const char *code; 417 struct apm_power_info pi; 418 419 switch (event_code) { 420 case APM_USER_STANDBY_REQ: 421 DPRINTF(APMDEBUG_EVENTS, ("apmev: user standby request\n")); 422 if (apm_do_standby) { 423 if (apm_record_event(sc, event_code)) 424 apm_userstandbys++; 425 apm_op_inprog++; 426 (void)sc->ops->set_powstate(sc->cookie, 427 APM_DEV_ALLDEVS, 428 APM_LASTREQ_INPROG); 429 } else { 430 (void)sc->ops->set_powstate(sc->cookie, 431 APM_DEV_ALLDEVS, 432 APM_LASTREQ_REJECTED); 433 /* in case BIOS hates being spurned */ 434 sc->ops->enable(sc->cookie, 1); 435 } 436 break; 437 438 case APM_STANDBY_REQ: 439 DPRINTF(APMDEBUG_EVENTS, ("apmev: system standby request\n")); 440 if (apm_standbys || apm_suspends) { 441 DPRINTF(APMDEBUG_EVENTS | APMDEBUG_ANOM, 442 ("damn fool BIOS did not wait for answer\n")); 443 /* just give up the fight */ 444 apm_damn_fool_bios = 1; 445 } 446 if (apm_do_standby) { 447 if (apm_record_event(sc, event_code)) 448 apm_standbys++; 449 apm_op_inprog++; 450 (void)sc->ops->set_powstate(sc->cookie, 451 APM_DEV_ALLDEVS, 452 APM_LASTREQ_INPROG); 453 } else { 454 (void)sc->ops->set_powstate(sc->cookie, 455 APM_DEV_ALLDEVS, 456 APM_LASTREQ_REJECTED); 457 /* in case BIOS hates being spurned */ 458 sc->ops->enable(sc->cookie, 1); 459 } 460 break; 461 462 case APM_USER_SUSPEND_REQ: 463 DPRINTF(APMDEBUG_EVENTS, ("apmev: user suspend request\n")); 464 if (apm_record_event(sc, event_code)) 465 apm_suspends++; 466 apm_op_inprog++; 467 (void)sc->ops->set_powstate(sc->cookie, 468 APM_DEV_ALLDEVS, 469 APM_LASTREQ_INPROG); 470 break; 471 472 case APM_SUSPEND_REQ: 473 DPRINTF(APMDEBUG_EVENTS, ("apmev: system suspend request\n")); 474 if (apm_standbys || apm_suspends) { 475 DPRINTF(APMDEBUG_EVENTS | APMDEBUG_ANOM, 476 ("damn fool BIOS did not wait for answer\n")); 477 /* just give up the fight */ 478 apm_damn_fool_bios = 1; 479 } 480 if (apm_record_event(sc, event_code)) 481 apm_suspends++; 482 apm_op_inprog++; 483 (void)sc->ops->set_powstate(sc->cookie, 484 APM_DEV_ALLDEVS, 485 APM_LASTREQ_INPROG); 486 break; 487 488 case APM_POWER_CHANGE: 489 DPRINTF(APMDEBUG_EVENTS, ("apmev: power status change\n")); 490 error = sc->ops->get_powstat(sc->cookie, &pi); 491 #ifdef APM_POWER_PRINT 492 /* only print if nobody is catching events. */ 493 if (error == 0 && 494 (sc->sc_flags & (SCFLAG_OREAD|SCFLAG_OWRITE)) == 0) 495 apm_power_print(sc, &pi); 496 #endif 497 apm_record_event(sc, event_code); 498 break; 499 500 case APM_NORMAL_RESUME: 501 DPRINTF(APMDEBUG_EVENTS, ("apmev: resume system\n")); 502 apm_resume(sc, event_code, event_info); 503 break; 504 505 case APM_CRIT_RESUME: 506 DPRINTF(APMDEBUG_EVENTS, ("apmev: critical resume system")); 507 apm_resume(sc, event_code, event_info); 508 break; 509 510 case APM_SYS_STANDBY_RESUME: 511 DPRINTF(APMDEBUG_EVENTS, ("apmev: system standby resume\n")); 512 apm_resume(sc, event_code, event_info); 513 break; 514 515 case APM_UPDATE_TIME: 516 DPRINTF(APMDEBUG_EVENTS, ("apmev: update time\n")); 517 apm_resume(sc, event_code, event_info); 518 break; 519 520 case APM_CRIT_SUSPEND_REQ: 521 DPRINTF(APMDEBUG_EVENTS, ("apmev: critical system suspend\n")); 522 apm_record_event(sc, event_code); 523 apm_suspend(sc); 524 break; 525 526 case APM_BATTERY_LOW: 527 DPRINTF(APMDEBUG_EVENTS, ("apmev: battery low\n")); 528 apm_battlow++; 529 apm_record_event(sc, event_code); 530 break; 531 532 case APM_CAP_CHANGE: 533 DPRINTF(APMDEBUG_EVENTS, ("apmev: capability change\n")); 534 if (apm_minver < 2) { 535 DPRINTF(APMDEBUG_EVENTS, ("apm: unexpected event\n")); 536 } else { 537 u_int numbatts, capflags; 538 sc->ops->get_capabilities(sc->cookie, 539 &numbatts, &capflags); 540 sc->ops->get_powstat(sc->cookie, &pi); /* XXX */ 541 } 542 break; 543 544 default: 545 switch (event_code >> 8) { 546 case 0: 547 code = "reserved system"; 548 break; 549 case 1: 550 code = "reserved device"; 551 break; 552 case 2: 553 code = "OEM defined"; 554 break; 555 default: 556 code = "reserved"; 557 break; 558 } 559 printf("APM: %s event code %x\n", code, event_code); 560 } 561 } 562 563 static void 564 apm_periodic_check(struct apm_softc *sc) 565 { 566 int error; 567 u_int event_code, event_info; 568 569 570 /* 571 * tell the BIOS we're working on it, if asked to do a 572 * suspend/standby 573 */ 574 if (apm_op_inprog) 575 sc->ops->set_powstate(sc->cookie, APM_DEV_ALLDEVS, 576 APM_LASTREQ_INPROG); 577 578 while ((error = sc->ops->get_event(sc->cookie, &event_code, 579 &event_info)) == 0 580 && !apm_damn_fool_bios) 581 apm_event_handle(sc, event_code, event_info); 582 583 if (error != APM_ERR_NOEVENTS) 584 apm_perror("get event", error); 585 if (apm_suspends) { 586 apm_op_inprog = 0; 587 apm_suspend(sc); 588 } else if (apm_standbys || apm_userstandbys) { 589 apm_op_inprog = 0; 590 apm_standby(sc); 591 } 592 apm_suspends = apm_standbys = apm_battlow = apm_userstandbys = 0; 593 apm_damn_fool_bios = 0; 594 } 595 596 static void 597 apm_set_ver(struct apm_softc *self, u_long detail) 598 { 599 600 if (apm_v12_enabled && 601 APM_MAJOR_VERS(detail) == 1 && 602 APM_MINOR_VERS(detail) == 2) { 603 apm_majver = 1; 604 apm_minver = 2; 605 goto ok; 606 } 607 608 if (apm_v11_enabled && 609 APM_MAJOR_VERS(detail) == 1 && 610 APM_MINOR_VERS(detail) == 1) { 611 apm_majver = 1; 612 apm_minver = 1; 613 } else { 614 apm_majver = 1; 615 apm_minver = 0; 616 } 617 ok: 618 printf("Power Management spec V%d.%d", apm_majver, apm_minver); 619 apm_inited = 1; 620 if (detail & APM_IDLE_SLOWS) { 621 #ifdef DIAGNOSTIC 622 /* not relevant often */ 623 printf(" (slowidle)"); 624 #endif 625 /* leave apm_do_idle at its user-configured setting */ 626 } else 627 apm_do_idle = 0; 628 #ifdef DIAGNOSTIC 629 if (detail & APM_BIOS_PM_DISABLED) 630 printf(" (BIOS mgmt disabled)"); 631 if (detail & APM_BIOS_PM_DISENGAGED) 632 printf(" (BIOS managing devices)"); 633 #endif 634 } 635 636 static int 637 apmmatch(struct device *parent, 638 struct cfdata *match, void *aux) 639 { 640 641 /* There can be only one! */ 642 if (apm_inited) 643 return 0; 644 645 return (1); 646 } 647 648 static void 649 apmattach(struct device *parent, struct device *self, void *aux) 650 { 651 struct apm_softc *sc = (void *)self; 652 struct apmdev_attach_args *aaa = aux; 653 struct apm_power_info pinfo; 654 u_int numbatts, capflags; 655 int error; 656 657 printf(": "); 658 659 sc->ops = aaa->accessops; 660 sc->cookie = aaa->accesscookie; 661 662 switch ((APM_MAJOR_VERS(aaa->apm_detail) << 8) + 663 APM_MINOR_VERS(aaa->apm_detail)) { 664 case 0x0100: 665 apm_v11_enabled = 0; 666 apm_v12_enabled = 0; 667 break; 668 case 0x0101: 669 apm_v12_enabled = 0; 670 /* fall through */ 671 case 0x0102: 672 default: 673 break; 674 } 675 676 apm_set_ver(sc, aaa->apm_detail); /* prints version info */ 677 printf("\n"); 678 if (apm_minver >= 2) 679 sc->ops->get_capabilities(sc->cookie, &numbatts, &capflags); 680 681 /* 682 * enable power management 683 */ 684 sc->ops->enable(sc->cookie, 1); 685 686 error = sc->ops->get_powstat(sc->cookie, &pinfo); 687 if (error == 0) { 688 #ifdef APM_POWER_PRINT 689 apm_power_print(apmsc, &pinfo); 690 #endif 691 } else 692 apm_perror("get power status", error); 693 sc->ops->cpu_busy(sc->cookie); 694 695 mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_NONE); 696 selinit(&sc->sc_rsel); 697 selinit(&sc->sc_xsel); 698 699 /* Initial state is `resumed'. */ 700 sc->sc_power_state = PWR_RESUME; 701 702 /* Do an initial check. */ 703 apm_periodic_check(sc); 704 705 /* 706 * Create a kernel thread to periodically check for APM events, 707 * and notify other subsystems when they occur. 708 */ 709 if (kthread_create(PRI_NONE, 0, NULL, apm_thread, sc, 710 &sc->sc_thread, "%s", device_xname(&sc->sc_dev)) != 0) { 711 /* 712 * We were unable to create the APM thread; bail out. 713 */ 714 sc->ops->disconnect(sc->cookie); 715 aprint_error_dev(&sc->sc_dev, "unable to create thread, " 716 "kernel APM support disabled\n"); 717 } 718 } 719 720 /* 721 * Print function (for parent devices). 722 */ 723 int 724 apmprint(void *aux, const char *pnp) 725 { 726 if (pnp) 727 aprint_normal("apm at %s", pnp); 728 729 return (UNCONF); 730 } 731 void 732 apm_thread(void *arg) 733 { 734 struct apm_softc *apmsc = arg; 735 736 /* 737 * Loop forever, doing a periodic check for APM events. 738 */ 739 for (;;) { 740 APM_LOCK(apmsc); 741 apm_periodic_check(apmsc); 742 APM_UNLOCK(apmsc); 743 (void) tsleep(apmsc, PWAIT, "apmev", (8 * hz) / 7); 744 } 745 } 746 747 int 748 apmdevopen(dev_t dev, int flag, int mode, struct lwp *l) 749 { 750 int ctl = APMDEV(dev); 751 int error = 0; 752 struct apm_softc *sc; 753 754 sc = device_lookup_private(&apmdev_cd, APMUNIT(dev)); 755 if (!sc) 756 return ENXIO; 757 758 if (!apm_inited) 759 return ENXIO; 760 761 DPRINTF(APMDEBUG_DEVICE, 762 ("apmopen: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 763 764 APM_LOCK(sc); 765 switch (ctl) { 766 case APMDEV_CTL: 767 if (!(flag & FWRITE)) { 768 error = EINVAL; 769 break; 770 } 771 if (sc->sc_flags & SCFLAG_OWRITE) { 772 error = EBUSY; 773 break; 774 } 775 sc->sc_flags |= SCFLAG_OWRITE; 776 break; 777 case APMDEV_NORMAL: 778 if (!(flag & FREAD) || (flag & FWRITE)) { 779 error = EINVAL; 780 break; 781 } 782 sc->sc_flags |= SCFLAG_OREAD; 783 break; 784 default: 785 error = ENXIO; 786 break; 787 } 788 APM_UNLOCK(sc); 789 790 return (error); 791 } 792 793 int 794 apmdevclose(dev_t dev, int flag, int mode, 795 struct lwp *l) 796 { 797 struct apm_softc *sc = device_lookup_private(&apmdev_cd, APMUNIT(dev)); 798 int ctl = APMDEV(dev); 799 800 DPRINTF(APMDEBUG_DEVICE, 801 ("apmclose: pid %d flag %x mode %x\n", l->l_proc->p_pid, flag, mode)); 802 803 APM_LOCK(sc); 804 switch (ctl) { 805 case APMDEV_CTL: 806 sc->sc_flags &= ~SCFLAG_OWRITE; 807 break; 808 case APMDEV_NORMAL: 809 sc->sc_flags &= ~SCFLAG_OREAD; 810 break; 811 } 812 if ((sc->sc_flags & SCFLAG_OPEN) == 0) { 813 sc->event_count = 0; 814 sc->event_ptr = 0; 815 } 816 APM_UNLOCK(sc); 817 return 0; 818 } 819 820 int 821 apmdevioctl(dev_t dev, u_long cmd, void *data, int flag, 822 struct lwp *l) 823 { 824 struct apm_softc *sc = device_lookup_private(&apmdev_cd, APMUNIT(dev)); 825 struct apm_power_info *powerp; 826 struct apm_event_info *evp; 827 #if 0 828 struct apm_ctl *actl; 829 #endif 830 int i, error = 0; 831 int batt_flags; 832 833 APM_LOCK(sc); 834 switch (cmd) { 835 case APM_IOC_STANDBY: 836 if (!apm_do_standby) { 837 error = EOPNOTSUPP; 838 break; 839 } 840 841 if ((flag & FWRITE) == 0) { 842 error = EBADF; 843 break; 844 } 845 apm_userstandbys++; 846 break; 847 848 case APM_IOC_SUSPEND: 849 if ((flag & FWRITE) == 0) { 850 error = EBADF; 851 break; 852 } 853 apm_suspends++; 854 break; 855 856 case APM_IOC_NEXTEVENT: 857 if (!sc->event_count) 858 error = EAGAIN; 859 else { 860 evp = (struct apm_event_info *)data; 861 i = sc->event_ptr + APM_NEVENTS - sc->event_count; 862 i %= APM_NEVENTS; 863 *evp = sc->event_list[i]; 864 sc->event_count--; 865 } 866 break; 867 868 case OAPM_IOC_GETPOWER: 869 case APM_IOC_GETPOWER: 870 powerp = (struct apm_power_info *)data; 871 if ((error = sc->ops->get_powstat(sc->cookie, powerp)) != 0) { 872 apm_perror("ioctl get power status", error); 873 error = EIO; 874 break; 875 } 876 switch (apm_minver) { 877 case 0: 878 break; 879 case 1: 880 default: 881 batt_flags = powerp->battery_state; 882 powerp->battery_state = APM_BATT_UNKNOWN; 883 if (batt_flags & APM_BATT_FLAG_HIGH) 884 powerp->battery_state = APM_BATT_HIGH; 885 else if (batt_flags & APM_BATT_FLAG_LOW) 886 powerp->battery_state = APM_BATT_LOW; 887 else if (batt_flags & APM_BATT_FLAG_CRITICAL) 888 powerp->battery_state = APM_BATT_CRITICAL; 889 else if (batt_flags & APM_BATT_FLAG_CHARGING) 890 powerp->battery_state = APM_BATT_CHARGING; 891 else if (batt_flags & APM_BATT_FLAG_NO_SYSTEM_BATTERY) 892 powerp->battery_state = APM_BATT_ABSENT; 893 break; 894 } 895 break; 896 897 default: 898 error = ENOTTY; 899 } 900 APM_UNLOCK(sc); 901 902 return (error); 903 } 904 905 int 906 apmdevpoll(dev_t dev, int events, struct lwp *l) 907 { 908 struct apm_softc *sc = device_lookup_private(&apmdev_cd, APMUNIT(dev)); 909 int revents = 0; 910 911 APM_LOCK(sc); 912 if (events & (POLLIN | POLLRDNORM)) { 913 if (sc->event_count) 914 revents |= events & (POLLIN | POLLRDNORM); 915 else 916 selrecord(l, &sc->sc_rsel); 917 } 918 APM_UNLOCK(sc); 919 920 return (revents); 921 } 922 923 static void 924 filt_apmrdetach(struct knote *kn) 925 { 926 struct apm_softc *sc = kn->kn_hook; 927 928 APM_LOCK(sc); 929 SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); 930 APM_UNLOCK(sc); 931 } 932 933 static int 934 filt_apmread(struct knote *kn, long hint) 935 { 936 struct apm_softc *sc = kn->kn_hook; 937 938 kn->kn_data = sc->event_count; 939 return (kn->kn_data > 0); 940 } 941 942 static const struct filterops apmread_filtops = 943 { 1, NULL, filt_apmrdetach, filt_apmread }; 944 945 int 946 apmdevkqfilter(dev_t dev, struct knote *kn) 947 { 948 struct apm_softc *sc = device_lookup_private(&apmdev_cd, APMUNIT(dev)); 949 struct klist *klist; 950 951 switch (kn->kn_filter) { 952 case EVFILT_READ: 953 klist = &sc->sc_rsel.sel_klist; 954 kn->kn_fop = &apmread_filtops; 955 break; 956 957 default: 958 return (EINVAL); 959 } 960 961 kn->kn_hook = sc; 962 963 APM_LOCK(sc); 964 SLIST_INSERT_HEAD(klist, kn, kn_selnext); 965 APM_UNLOCK(sc); 966 967 return (0); 968 } 969
Indexes created Thu Sep 25 08:09:54 GMT 2025