FreeBSD/Linux Kernel Cross Reference
sys/i386/bios/apm.c
1 /*-
2 * APM (Advanced Power Management) BIOS Device Driver
3 *
4 * Copyright (c) 1994 UKAI, Fumitoshi.
5 * Copyright (c) 1994-1995 by HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
6 * Copyright (c) 1996 Nate Williams <nate@FreeBSD.org>
7 * Copyright (c) 1997 Poul-Henning Kamp <phk@FreeBSD.org>
8 *
9 * This software may be used, modified, copied, and distributed, in
10 * both source and binary form provided that the above copyright and
11 * these terms are retained. Under no circumstances is the author
12 * responsible for the proper functioning of this software, nor does
13 * the author assume any responsibility for damages incurred with its
14 * use.
15 *
16 * Sep, 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD)
17 */
18
19 #include <sys/cdefs.h>
20 __FBSDID("$FreeBSD: releng/6.1/sys/i386/bios/apm.c 144964 2005-04-12 20:14:56Z mdodd $");
21
22 #include <sys/param.h>
23 #include <sys/systm.h>
24 #include <sys/bus.h>
25 #include <sys/conf.h>
26 #include <sys/eventhandler.h>
27 #include <sys/fcntl.h>
28 #include <sys/kernel.h>
29 #include <sys/module.h>
30 #include <sys/poll.h>
31 #include <sys/power.h>
32 #include <sys/reboot.h>
33 #include <sys/selinfo.h>
34 #include <sys/signalvar.h>
35 #include <sys/sysctl.h>
36 #include <sys/syslog.h>
37 #include <sys/time.h>
38 #include <sys/uio.h>
39
40 #include <machine/apm_bios.h>
41 #include <machine/clock.h>
42 #include <machine/endian.h>
43 #include <machine/pc/bios.h>
44 #include <machine/cpufunc.h>
45 #include <machine/segments.h>
46 #include <machine/stdarg.h>
47 #include <machine/vm86.h>
48
49 #include <machine/bus.h>
50 #include <machine/resource.h>
51 #include <sys/rman.h>
52
53 #include <vm/vm.h>
54 #include <vm/pmap.h>
55 #include <vm/vm_param.h>
56
57 #include <i386/bios/apm.h>
58
59 /* Used by the apm_saver screen saver module */
60 int apm_display(int newstate);
61 struct apm_softc apm_softc;
62
63 static void apm_resume(void);
64 static int apm_bioscall(void);
65 static int apm_check_function_supported(u_int version, u_int func);
66
67 static int apm_pm_func(u_long, void*, ...);
68
69 static u_long apm_version;
70
71 int apm_evindex;
72
73 #define SCFLAG_ONORMAL 0x0000001
74 #define SCFLAG_OCTL 0x0000002
75 #define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL)
76
77 #define APMDEV(dev) (minor(dev)&0x0f)
78 #define APMDEV_NORMAL 0
79 #define APMDEV_CTL 8
80
81 #ifdef PC98
82 extern int bios32_apm98(struct bios_regs *, u_int, u_short);
83
84 /* PC98's SMM definition */
85 #define APM_NECSMM_PORT 0x6b8e
86 #define APM_NECSMM_PORTSZ 1
87 #define APM_NECSMM_EN 0x10
88 static __inline void apm_enable_smm(struct apm_softc *);
89 static __inline void apm_disable_smm(struct apm_softc *);
90 int apm_necsmm_addr;
91 u_int32_t apm_necsmm_mask;
92 #endif
93
94 static struct apmhook *hook[NAPM_HOOK]; /* XXX */
95
96 #define is_enabled(foo) ((foo) ? "enabled" : "disabled")
97
98 /* Map version number to integer (keeps ordering of version numbers) */
99 #define INTVERSION(major, minor) ((major)*100 + (minor))
100
101 static struct callout_handle apm_timeout_ch =
102 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch);
103
104 static timeout_t apm_timeout;
105 static d_open_t apmopen;
106 static d_close_t apmclose;
107 static d_write_t apmwrite;
108 static d_ioctl_t apmioctl;
109 static d_poll_t apmpoll;
110
111 static struct cdevsw apm_cdevsw = {
112 .d_version = D_VERSION,
113 .d_flags = D_NEEDGIANT,
114 .d_open = apmopen,
115 .d_close = apmclose,
116 .d_write = apmwrite,
117 .d_ioctl = apmioctl,
118 .d_poll = apmpoll,
119 .d_name = "apm",
120 };
121
122 static int apm_suspend_delay = 1;
123 static int apm_standby_delay = 1;
124 static int apm_swab_batt_minutes = 0;
125 static int apm_debug = 0;
126
127 #define APM_DPRINT(args...) do { \
128 if (apm_debug) { \
129 printf(args); \
130 } \
131 } while (0)
132
133 SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, "");
134 SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, "");
135 SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, "");
136
137 TUNABLE_INT("machdep.apm_swab_batt_minutes", &apm_swab_batt_minutes);
138 SYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RW,
139 &apm_swab_batt_minutes, 0, "Byte swap battery time value.");
140
141 #ifdef PC98
142 static __inline void
143 apm_enable_smm(sc)
144 struct apm_softc *sc;
145 {
146 bus_space_tag_t iot = sc->sc_iot;
147 bus_space_handle_t ioh = sc->sc_ioh;
148 if (apm_necsmm_addr != 0)
149 bus_space_write_1(iot, ioh, 0,
150 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask));
151 }
152
153 static __inline void
154 apm_disable_smm(sc)
155 struct apm_softc *sc;
156 {
157 bus_space_tag_t iot = sc->sc_iot;
158 bus_space_handle_t ioh = sc->sc_ioh;
159 if (apm_necsmm_addr != 0)
160 bus_space_write_1(iot, ioh, 0,
161 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask));
162 }
163 #endif
164
165 /*
166 * return 0 if the function successfull,
167 * return 1 if the function unsuccessfull,
168 * return -1 if the function unsupported.
169 */
170 static int
171 apm_bioscall(void)
172 {
173 struct apm_softc *sc = &apm_softc;
174 int errno = 0;
175 u_int apm_func = sc->bios.r.eax & 0xff;
176
177 if (!apm_check_function_supported(sc->intversion, apm_func)) {
178 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n",
179 apm_func, sc->majorversion, sc->minorversion);
180 return (-1);
181 }
182
183 sc->bios_busy = 1;
184 #ifdef PC98
185 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG);
186 if (bios32_apm98(&sc->bios.r, sc->bios.entry,
187 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0)
188 return 1;
189 #else
190 if (sc->connectmode == APM_PROT32CONNECT) {
191 set_bios_selectors(&sc->bios.seg,
192 BIOSCODE_FLAG | BIOSDATA_FLAG);
193 errno = bios32(&sc->bios.r,
194 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL));
195 } else {
196 errno = bios16(&sc->bios, NULL);
197 }
198 #endif
199 sc->bios_busy = 0;
200 return (errno);
201 }
202
203 /* check whether APM function is supported (1) or not (0). */
204 static int
205 apm_check_function_supported(u_int version, u_int func)
206 {
207 /* except driver version */
208 if (func == APM_DRVVERSION) {
209 return (1);
210 }
211 #ifdef PC98
212 if (func == APM_GETPWSTATUS) {
213 return (1);
214 }
215 #endif
216
217 switch (version) {
218 case INTVERSION(1, 0):
219 if (func > APM_GETPMEVENT) {
220 return (0); /* not supported */
221 }
222 break;
223 case INTVERSION(1, 1):
224 if (func > APM_ENGAGEDISENGAGEPM &&
225 func < APM_OEMFUNC) {
226 return (0); /* not supported */
227 }
228 break;
229 case INTVERSION(1, 2):
230 break;
231 }
232
233 return (1); /* supported */
234 }
235
236 /* enable/disable power management */
237 static int
238 apm_enable_disable_pm(int enable)
239 {
240 struct apm_softc *sc = &apm_softc;
241
242 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
243
244 if (sc->intversion >= INTVERSION(1, 1))
245 sc->bios.r.ebx = PMDV_ALLDEV;
246 else
247 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */
248 sc->bios.r.ecx = enable;
249 sc->bios.r.edx = 0;
250 return (apm_bioscall());
251 }
252
253 /* register driver version (APM 1.1 or later) */
254 static int
255 apm_driver_version(int version)
256 {
257 struct apm_softc *sc = &apm_softc;
258
259 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION;
260 sc->bios.r.ebx = 0x0;
261 sc->bios.r.ecx = version;
262 sc->bios.r.edx = 0;
263
264 if (apm_bioscall() == 0 && sc->bios.r.eax == version)
265 return (0);
266
267 /* Some old BIOSes don't return the connection version in %ax. */
268 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION))
269 return (0);
270
271 return (1);
272 }
273
274 /* engage/disengage power management (APM 1.1 or later) */
275 static int
276 apm_engage_disengage_pm(int engage)
277 {
278 struct apm_softc *sc = &apm_softc;
279
280 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
281 sc->bios.r.ebx = PMDV_ALLDEV;
282 sc->bios.r.ecx = engage;
283 sc->bios.r.edx = 0;
284 return (apm_bioscall());
285 }
286
287 /* get PM event */
288 static u_int
289 apm_getevent(void)
290 {
291 struct apm_softc *sc = &apm_softc;
292
293 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT;
294
295 sc->bios.r.ebx = 0;
296 sc->bios.r.ecx = 0;
297 sc->bios.r.edx = 0;
298 if (apm_bioscall())
299 return (PMEV_NOEVENT);
300 return (sc->bios.r.ebx & 0xffff);
301 }
302
303 /* suspend entire system */
304 static int
305 apm_suspend_system(int state)
306 {
307 struct apm_softc *sc = &apm_softc;
308
309 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
310 sc->bios.r.ebx = PMDV_ALLDEV;
311 sc->bios.r.ecx = state;
312 sc->bios.r.edx = 0;
313
314 #ifdef PC98
315 apm_disable_smm(sc);
316 #endif
317 if (apm_bioscall()) {
318 printf("Entire system suspend failure: errcode = %d\n",
319 0xff & (sc->bios.r.eax >> 8));
320 return 1;
321 }
322 #ifdef PC98
323 apm_enable_smm(sc);
324 #endif
325 return 0;
326 }
327
328 /* Display control */
329 /*
330 * Experimental implementation: My laptop machine can't handle this function
331 * If your laptop can control the display via APM, please inform me.
332 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
333 */
334 int
335 apm_display(int newstate)
336 {
337 struct apm_softc *sc = &apm_softc;
338
339 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
340 sc->bios.r.ebx = PMDV_DISP0;
341 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
342 sc->bios.r.edx = 0;
343 if (apm_bioscall() == 0) {
344 return 0;
345 }
346
347 /* If failed, then try to blank all display devices instead. */
348 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
349 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */
350 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
351 sc->bios.r.edx = 0;
352 if (apm_bioscall() == 0) {
353 return 0;
354 }
355 printf("Display off failure: errcode = %d\n",
356 0xff & (sc->bios.r.eax >> 8));
357 return 1;
358 }
359
360 /*
361 * Turn off the entire system.
362 */
363 static void
364 apm_power_off(void *junk, int howto)
365 {
366 struct apm_softc *sc = &apm_softc;
367
368 /* Not halting powering off, or not active */
369 if (!(howto & RB_POWEROFF) || !apm_softc.active)
370 return;
371 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
372 sc->bios.r.ebx = PMDV_ALLDEV;
373 sc->bios.r.ecx = PMST_OFF;
374 sc->bios.r.edx = 0;
375 (void) apm_bioscall();
376 }
377
378 /* APM Battery low handler */
379 static void
380 apm_battery_low(void)
381 {
382 printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
383 }
384
385 /* APM hook manager */
386 static struct apmhook *
387 apm_add_hook(struct apmhook **list, struct apmhook *ah)
388 {
389 int s;
390 struct apmhook *p, *prev;
391
392 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name);
393
394 s = splhigh();
395 if (ah == NULL)
396 panic("illegal apm_hook!");
397 prev = NULL;
398 for (p = *list; p != NULL; prev = p, p = p->ah_next)
399 if (p->ah_order > ah->ah_order)
400 break;
401
402 if (prev == NULL) {
403 ah->ah_next = *list;
404 *list = ah;
405 } else {
406 ah->ah_next = prev->ah_next;
407 prev->ah_next = ah;
408 }
409 splx(s);
410 return ah;
411 }
412
413 static void
414 apm_del_hook(struct apmhook **list, struct apmhook *ah)
415 {
416 int s;
417 struct apmhook *p, *prev;
418
419 s = splhigh();
420 prev = NULL;
421 for (p = *list; p != NULL; prev = p, p = p->ah_next)
422 if (p == ah)
423 goto deleteit;
424 panic("Tried to delete unregistered apm_hook.");
425 goto nosuchnode;
426 deleteit:
427 if (prev != NULL)
428 prev->ah_next = p->ah_next;
429 else
430 *list = p->ah_next;
431 nosuchnode:
432 splx(s);
433 }
434
435
436 /* APM driver calls some functions automatically */
437 static void
438 apm_execute_hook(struct apmhook *list)
439 {
440 struct apmhook *p;
441
442 for (p = list; p != NULL; p = p->ah_next) {
443 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name);
444 if ((*(p->ah_fun))(p->ah_arg))
445 printf("Warning: APM hook \"%s\" failed", p->ah_name);
446 }
447 }
448
449
450 /* establish an apm hook */
451 struct apmhook *
452 apm_hook_establish(int apmh, struct apmhook *ah)
453 {
454 if (apmh < 0 || apmh >= NAPM_HOOK)
455 return NULL;
456
457 return apm_add_hook(&hook[apmh], ah);
458 }
459
460 /* disestablish an apm hook */
461 void
462 apm_hook_disestablish(int apmh, struct apmhook *ah)
463 {
464 if (apmh < 0 || apmh >= NAPM_HOOK)
465 return;
466
467 apm_del_hook(&hook[apmh], ah);
468 }
469
470 static int apm_record_event(struct apm_softc *, u_int);
471 static void apm_processevent(void);
472
473 static u_int apm_op_inprog = 0;
474
475 static void
476 apm_do_suspend(void)
477 {
478 struct apm_softc *sc = &apm_softc;
479 int error;
480
481 if (sc == NULL || sc->initialized == 0)
482 return;
483
484 apm_op_inprog = 0;
485 sc->suspends = sc->suspend_countdown = 0;
486
487 error = DEVICE_SUSPEND(root_bus);
488 if (error)
489 return;
490
491 apm_execute_hook(hook[APM_HOOK_SUSPEND]);
492 if (apm_suspend_system(PMST_SUSPEND) == 0) {
493 sc->suspending = 1;
494 apm_processevent();
495 } else {
496 /* Failure, 'resume' the system again */
497 apm_execute_hook(hook[APM_HOOK_RESUME]);
498 DEVICE_RESUME(root_bus);
499 }
500 return;
501 }
502
503 static void
504 apm_do_standby(void)
505 {
506 struct apm_softc *sc = &apm_softc;
507
508 if (sc == NULL || sc->initialized == 0)
509 return;
510
511 apm_op_inprog = 0;
512 sc->standbys = sc->standby_countdown = 0;
513
514 /*
515 * As far as standby, we don't need to execute
516 * all of suspend hooks.
517 */
518 if (apm_suspend_system(PMST_STANDBY) == 0)
519 apm_processevent();
520 return;
521 }
522
523 static void
524 apm_lastreq_notify(void)
525 {
526 struct apm_softc *sc = &apm_softc;
527
528 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
529 sc->bios.r.ebx = PMDV_ALLDEV;
530 sc->bios.r.ecx = PMST_LASTREQNOTIFY;
531 sc->bios.r.edx = 0;
532 apm_bioscall();
533 }
534
535 static int
536 apm_lastreq_rejected(void)
537 {
538 struct apm_softc *sc = &apm_softc;
539
540 if (apm_op_inprog == 0) {
541 return 1; /* no operation in progress */
542 }
543
544 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
545 sc->bios.r.ebx = PMDV_ALLDEV;
546 sc->bios.r.ecx = PMST_LASTREQREJECT;
547 sc->bios.r.edx = 0;
548
549 if (apm_bioscall()) {
550 APM_DPRINT("apm_lastreq_rejected: failed\n");
551 return 1;
552 }
553 apm_op_inprog = 0;
554 return 0;
555 }
556
557 /*
558 * Public interface to the suspend/resume:
559 *
560 * Execute suspend and resume hook before and after sleep, respectively.
561 *
562 */
563
564 void
565 apm_suspend(int state)
566 {
567 struct apm_softc *sc = &apm_softc;
568
569 if (sc == NULL || sc->initialized == 0)
570 return;
571
572 switch (state) {
573 case PMST_SUSPEND:
574 if (sc->suspends)
575 return;
576 sc->suspends++;
577 sc->suspend_countdown = apm_suspend_delay;
578 break;
579 case PMST_STANDBY:
580 if (sc->standbys)
581 return;
582 sc->standbys++;
583 sc->standby_countdown = apm_standby_delay;
584 break;
585 default:
586 printf("apm_suspend: Unknown Suspend state 0x%x\n", state);
587 return;
588 }
589
590 apm_op_inprog++;
591 apm_lastreq_notify();
592 }
593
594 static void
595 apm_resume(void)
596 {
597 struct apm_softc *sc = &apm_softc;
598
599 if (sc == NULL || sc->initialized == 0 || sc->suspending == 0)
600 return;
601
602 sc->suspending = 0;
603 apm_execute_hook(hook[APM_HOOK_RESUME]);
604 DEVICE_RESUME(root_bus);
605 return;
606 }
607
608
609 /* get power status per battery */
610 static int
611 apm_get_pwstatus(apm_pwstatus_t app)
612 {
613 struct apm_softc *sc = &apm_softc;
614
615 if (app->ap_device != PMDV_ALLDEV &&
616 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
617 return 1;
618
619 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
620 sc->bios.r.ebx = app->ap_device;
621 sc->bios.r.ecx = 0;
622 sc->bios.r.edx = 0xffff; /* default to unknown battery time */
623
624 if (apm_bioscall())
625 return 1;
626
627 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff;
628 app->ap_batt_stat = sc->bios.r.ebx & 0xff;
629 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff;
630 app->ap_batt_life = sc->bios.r.ecx & 0xff;
631 sc->bios.r.edx &= 0xffff;
632 if (apm_swab_batt_minutes)
633 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000;
634 if (sc->bios.r.edx == 0xffff) /* Time is unknown */
635 app->ap_batt_time = -1;
636 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */
637 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60;
638 else /* Time is in seconds */
639 app->ap_batt_time = sc->bios.r.edx;
640
641 return 0;
642 }
643
644
645 /* get APM information */
646 static int
647 apm_get_info(apm_info_t aip)
648 {
649 struct apm_softc *sc = &apm_softc;
650 struct apm_pwstatus aps;
651
652 bzero(&aps, sizeof(aps));
653 aps.ap_device = PMDV_ALLDEV;
654 if (apm_get_pwstatus(&aps))
655 return 1;
656
657 aip->ai_infoversion = 1;
658 aip->ai_acline = aps.ap_acline;
659 aip->ai_batt_stat = aps.ap_batt_stat;
660 aip->ai_batt_life = aps.ap_batt_life;
661 aip->ai_batt_time = aps.ap_batt_time;
662 aip->ai_major = (u_int)sc->majorversion;
663 aip->ai_minor = (u_int)sc->minorversion;
664 aip->ai_status = (u_int)sc->active;
665
666 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES;
667 sc->bios.r.ebx = 0;
668 sc->bios.r.ecx = 0;
669 sc->bios.r.edx = 0;
670 if (apm_bioscall()) {
671 aip->ai_batteries = 0xffffffff; /* Unknown */
672 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */
673 } else {
674 aip->ai_batteries = sc->bios.r.ebx & 0xff;
675 aip->ai_capabilities = sc->bios.r.ecx & 0xff;
676 }
677
678 bzero(aip->ai_spare, sizeof aip->ai_spare);
679
680 return 0;
681 }
682
683
684 /* inform APM BIOS that CPU is idle */
685 void
686 apm_cpu_idle(void)
687 {
688 struct apm_softc *sc = &apm_softc;
689
690 if (sc->active) {
691
692 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE;
693 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
694 (void) apm_bioscall();
695 }
696 /*
697 * Some APM implementation halts CPU in BIOS, whenever
698 * "CPU-idle" function are invoked, but swtch() of
699 * FreeBSD halts CPU, therefore, CPU is halted twice
700 * in the sched loop. It makes the interrupt latency
701 * terribly long and be able to cause a serious problem
702 * in interrupt processing. We prevent it by removing
703 * "hlt" operation from swtch() and managed it under
704 * APM driver.
705 */
706 if (!sc->active || sc->always_halt_cpu)
707 halt(); /* wait for interrupt */
708 }
709
710 /* inform APM BIOS that CPU is busy */
711 void
712 apm_cpu_busy(void)
713 {
714 struct apm_softc *sc = &apm_softc;
715
716 /*
717 * The APM specification says this is only necessary if your BIOS
718 * slows down the processor in the idle task, otherwise it's not
719 * necessary.
720 */
721 if (sc->slow_idle_cpu && sc->active) {
722
723 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY;
724 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
725 apm_bioscall();
726 }
727 }
728
729
730 /*
731 * APM timeout routine:
732 *
733 * This routine is automatically called by timer once per second.
734 */
735
736 static void
737 apm_timeout(void *dummy)
738 {
739 struct apm_softc *sc = &apm_softc;
740
741 if (apm_op_inprog)
742 apm_lastreq_notify();
743
744 if (sc->standbys && sc->standby_countdown-- <= 0)
745 apm_do_standby();
746
747 if (sc->suspends && sc->suspend_countdown-- <= 0)
748 apm_do_suspend();
749
750 if (!sc->bios_busy)
751 apm_processevent();
752
753 if (sc->active == 1)
754 /* Run slightly more oftan than 1 Hz */
755 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1);
756 }
757
758 /* enable APM BIOS */
759 static void
760 apm_event_enable(void)
761 {
762 struct apm_softc *sc = &apm_softc;
763
764 APM_DPRINT("called apm_event_enable()\n");
765
766 if (sc == NULL || sc->initialized == 0)
767 return;
768
769 sc->active = 1;
770 apm_timeout(sc);
771
772 return;
773 }
774
775 /* disable APM BIOS */
776 static void
777 apm_event_disable(void)
778 {
779 struct apm_softc *sc = &apm_softc;
780
781 APM_DPRINT("called apm_event_disable()\n");
782
783 if (sc == NULL || sc->initialized == 0)
784 return;
785
786 untimeout(apm_timeout, NULL, apm_timeout_ch);
787 sc->active = 0;
788
789 return;
790 }
791
792 /* halt CPU in scheduling loop */
793 static void
794 apm_halt_cpu(void)
795 {
796 struct apm_softc *sc = &apm_softc;
797
798 if (sc == NULL || sc->initialized == 0)
799 return;
800
801 sc->always_halt_cpu = 1;
802
803 return;
804 }
805
806 /* don't halt CPU in scheduling loop */
807 static void
808 apm_not_halt_cpu(void)
809 {
810 struct apm_softc *sc = &apm_softc;
811
812 if (sc == NULL || sc->initialized == 0)
813 return;
814
815 sc->always_halt_cpu = 0;
816
817 return;
818 }
819
820 /* device driver definitions */
821
822 /*
823 * Module event
824 */
825
826 static int
827 apm_modevent(struct module *mod, int event, void *junk)
828 {
829
830 switch (event) {
831 case MOD_LOAD:
832 if (!cold)
833 return (EPERM);
834 break;
835 case MOD_UNLOAD:
836 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM)
837 return (EBUSY);
838 break;
839 default:
840 break;
841 }
842
843 return (0);
844 }
845
846 /*
847 * Create "connection point"
848 */
849 static void
850 apm_identify(driver_t *driver, device_t parent)
851 {
852 device_t child;
853
854 if (!cold) {
855 printf("Don't load this driver from userland!!\n");
856 return;
857 }
858
859 if (resource_disabled("apm", 0))
860 return;
861
862 child = BUS_ADD_CHILD(parent, 0, "apm", 0);
863 if (child == NULL)
864 panic("apm_identify");
865 }
866
867 /*
868 * probe for APM BIOS
869 */
870 static int
871 apm_probe(device_t dev)
872 {
873 #define APM_KERNBASE KERNBASE
874 struct vm86frame vmf;
875 struct apm_softc *sc = &apm_softc;
876 #ifdef PC98
877 int rid;
878 #endif
879
880 device_set_desc(dev, "APM BIOS");
881 if (device_get_unit(dev) > 0) {
882 printf("apm: Only one APM driver supported.\n");
883 return ENXIO;
884 }
885
886 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
887 power_pm_get_type() != POWER_PM_TYPE_APM) {
888 printf("apm: Other PM system enabled.\n");
889 return ENXIO;
890 }
891
892 bzero(&vmf, sizeof(struct vm86frame)); /* safety */
893 bzero(&apm_softc, sizeof(apm_softc));
894 vmf.vmf_ah = APM_BIOS;
895 vmf.vmf_al = APM_INSTCHECK;
896 vmf.vmf_bx = 0;
897 if (vm86_intcall(APM_INT, &vmf))
898 return ENXIO; /* APM not found */
899 if (vmf.vmf_bx != 0x504d) {
900 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
901 return ENXIO;
902 }
903 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
904 printf("apm: protected mode connections are not supported\n");
905 return ENXIO;
906 }
907
908 apm_version = vmf.vmf_ax;
909 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
910 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
911 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
912
913 vmf.vmf_ah = APM_BIOS;
914 vmf.vmf_al = APM_DISCONNECT;
915 vmf.vmf_bx = 0;
916 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */
917
918 #ifdef PC98
919 /* PC98 have bogos APM 32bit BIOS */
920 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0)
921 return ENXIO;
922 rid = 0;
923 bus_set_resource(dev, SYS_RES_IOPORT, rid,
924 APM_NECSMM_PORT, APM_NECSMM_PORTSZ);
925 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
926 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
927 if (sc->sc_res == NULL) {
928 printf("apm: cannot open NEC smm device\n");
929 return ENXIO;
930 }
931 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res);
932
933 vmf.vmf_ah = APM_BIOS;
934 vmf.vmf_al = APM_PROT32CONNECT;
935 vmf.vmf_bx = 0;
936 if (vm86_intcall(APM_INT, &vmf)) {
937 printf("apm: 32-bit connection error.\n");
938 return (ENXIO);
939 }
940
941 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
942 sc->bios.seg.code32.limit = 0xffff;
943 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
944 sc->bios.seg.code16.limit = 0xffff;
945 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
946 sc->bios.seg.data.limit = 0xffff;
947 sc->bios.entry = vmf.vmf_ebx;
948 sc->connectmode = APM_PROT32CONNECT;
949 #else
950 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
951 vmf.vmf_ah = APM_BIOS;
952 vmf.vmf_al = APM_PROT32CONNECT;
953 vmf.vmf_bx = 0;
954 if (vm86_intcall(APM_INT, &vmf)) {
955 printf("apm: 32-bit connection error.\n");
956 return (ENXIO);
957 }
958 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
959 sc->bios.seg.code32.limit = 0xffff;
960 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
961 sc->bios.seg.code16.limit = 0xffff;
962 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
963 sc->bios.seg.data.limit = 0xffff;
964 sc->bios.entry = vmf.vmf_ebx;
965 sc->connectmode = APM_PROT32CONNECT;
966 } else {
967 /* use 16-bit connection */
968 vmf.vmf_ah = APM_BIOS;
969 vmf.vmf_al = APM_PROT16CONNECT;
970 vmf.vmf_bx = 0;
971 if (vm86_intcall(APM_INT, &vmf)) {
972 printf("apm: 16-bit connection error.\n");
973 return (ENXIO);
974 }
975 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
976 sc->bios.seg.code16.limit = 0xffff;
977 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
978 sc->bios.seg.data.limit = 0xffff;
979 sc->bios.entry = vmf.vmf_bx;
980 sc->connectmode = APM_PROT16CONNECT;
981 }
982 #endif
983 return(0);
984 }
985
986
987 /*
988 * return 0 if the user will notice and handle the event,
989 * return 1 if the kernel driver should do so.
990 */
991 static int
992 apm_record_event(struct apm_softc *sc, u_int event_type)
993 {
994 struct apm_event_info *evp;
995
996 if ((sc->sc_flags & SCFLAG_OPEN) == 0)
997 return 1; /* no user waiting */
998 if (sc->event_count == APM_NEVENTS)
999 return 1; /* overflow */
1000 if (sc->event_filter[event_type] == 0)
1001 return 1; /* not registered */
1002 evp = &sc->event_list[sc->event_ptr];
1003 sc->event_count++;
1004 sc->event_ptr++;
1005 sc->event_ptr %= APM_NEVENTS;
1006 evp->type = event_type;
1007 evp->index = ++apm_evindex;
1008 selwakeuppri(&sc->sc_rsel, PZERO);
1009 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
1010 }
1011
1012 /* Power profile */
1013 static void
1014 apm_power_profile(struct apm_softc *sc)
1015 {
1016 int state;
1017 struct apm_info info;
1018 static int apm_acline = 0;
1019
1020 if (apm_get_info(&info))
1021 return;
1022
1023 if (apm_acline != info.ai_acline) {
1024 apm_acline = info.ai_acline;
1025 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY;
1026 power_profile_set_state(state);
1027 }
1028 }
1029
1030 /* Process APM event */
1031 static void
1032 apm_processevent(void)
1033 {
1034 int apm_event;
1035 struct apm_softc *sc = &apm_softc;
1036
1037 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
1038 APM_DPRINT("Received APM Event: " #symbol "\n");
1039
1040 do {
1041 apm_event = apm_getevent();
1042 switch (apm_event) {
1043 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
1044 if (apm_op_inprog == 0) {
1045 apm_op_inprog++;
1046 if (apm_record_event(sc, apm_event)) {
1047 apm_suspend(PMST_STANDBY);
1048 }
1049 }
1050 break;
1051 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ);
1052 if (apm_op_inprog == 0) {
1053 apm_op_inprog++;
1054 if (apm_record_event(sc, apm_event)) {
1055 apm_suspend(PMST_STANDBY);
1056 }
1057 }
1058 break;
1059 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
1060 apm_lastreq_notify();
1061 if (apm_op_inprog == 0) {
1062 apm_op_inprog++;
1063 if (apm_record_event(sc, apm_event)) {
1064 apm_do_suspend();
1065 }
1066 }
1067 return; /* XXX skip the rest */
1068 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
1069 apm_lastreq_notify();
1070 if (apm_op_inprog == 0) {
1071 apm_op_inprog++;
1072 if (apm_record_event(sc, apm_event)) {
1073 apm_do_suspend();
1074 }
1075 }
1076 return; /* XXX skip the rest */
1077 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
1078 apm_do_suspend();
1079 break;
1080 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
1081 apm_record_event(sc, apm_event);
1082 apm_resume();
1083 break;
1084 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
1085 apm_record_event(sc, apm_event);
1086 apm_resume();
1087 break;
1088 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
1089 apm_record_event(sc, apm_event);
1090 break;
1091 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
1092 if (apm_record_event(sc, apm_event)) {
1093 apm_battery_low();
1094 apm_suspend(PMST_SUSPEND);
1095 }
1096 break;
1097 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
1098 apm_record_event(sc, apm_event);
1099 apm_power_profile(sc);
1100 break;
1101 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
1102 apm_record_event(sc, apm_event);
1103 inittodr(0); /* adjust time to RTC */
1104 break;
1105 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
1106 apm_record_event(sc, apm_event);
1107 apm_power_profile(sc);
1108 break;
1109 case PMEV_NOEVENT:
1110 break;
1111 default:
1112 printf("Unknown Original APM Event 0x%x\n", apm_event);
1113 break;
1114 }
1115 } while (apm_event != PMEV_NOEVENT);
1116 #ifdef PC98
1117 apm_disable_smm(sc);
1118 #endif
1119 }
1120
1121 /*
1122 * Attach APM:
1123 *
1124 * Initialize APM driver
1125 */
1126
1127 static int
1128 apm_attach(device_t dev)
1129 {
1130 struct apm_softc *sc = &apm_softc;
1131 int drv_version;
1132 #ifdef PC98
1133 int rid;
1134 #endif
1135
1136 if (device_get_flags(dev) & 0x20)
1137 statclock_disable = 1;
1138
1139 sc->initialized = 0;
1140
1141 /* Must be externally enabled */
1142 sc->active = 0;
1143
1144 /* Always call HLT in idle loop */
1145 sc->always_halt_cpu = 1;
1146
1147 getenv_int("debug.apm_debug", &apm_debug);
1148
1149 /* print bootstrap messages */
1150 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version);
1151 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n",
1152 sc->bios.seg.code16.base, sc->bios.seg.data.base);
1153 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
1154 sc->bios.entry, is_enabled(sc->slow_idle_cpu),
1155 is_enabled(!sc->disabled));
1156 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n",
1157 sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
1158
1159 #ifdef PC98
1160 rid = 0;
1161 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
1162 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
1163 if (sc->sc_res == NULL)
1164 panic("%s: counldn't map I/O ports", device_get_name(dev));
1165 sc->sc_iot = rman_get_bustag(sc->sc_res);
1166 sc->sc_ioh = rman_get_bushandle(sc->sc_res);
1167
1168 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110)
1169 apm_necsmm_addr = APM_NECSMM_PORT;
1170 else
1171 apm_necsmm_addr = 0;
1172 apm_necsmm_mask = ~APM_NECSMM_EN;
1173 #endif /* PC98 */
1174
1175 /*
1176 * In one test, apm bios version was 1.02; an attempt to register
1177 * a 1.04 driver resulted in a 1.00 connection! Registering a
1178 * 1.02 driver resulted in a 1.02 connection.
1179 */
1180 drv_version = apm_version > 0x102 ? 0x102 : apm_version;
1181 for (; drv_version > 0x100; drv_version--)
1182 if (apm_driver_version(drv_version) == 0)
1183 break;
1184 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 +
1185 ((drv_version & 0x000f) >> 0);
1186 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
1187 ((apm_version & 0x0f00) >> 8);
1188
1189 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
1190
1191 if (sc->intversion >= INTVERSION(1, 1))
1192 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
1193 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n",
1194 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
1195 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
1196 sc->majorversion, sc->minorversion);
1197
1198
1199 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
1200 /* enable power management */
1201 if (sc->disabled) {
1202 if (apm_enable_disable_pm(1)) {
1203 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n",
1204 (sc->bios.r.eax >> 8) & 0xff);
1205 }
1206 }
1207
1208 /* engage power managment (APM 1.1 or later) */
1209 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
1210 if (apm_engage_disengage_pm(1)) {
1211 APM_DPRINT("apm: *Warning* engage function failed err=[%x]",
1212 (sc->bios.r.eax >> 8) & 0xff);
1213 APM_DPRINT(" (Docked or using external power?).\n");
1214 }
1215 }
1216
1217 /* Power the system off using APM */
1218 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL,
1219 SHUTDOWN_PRI_LAST);
1220
1221 /* Register APM again to pass the correct argument of pm_func. */
1222 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc);
1223
1224 sc->initialized = 1;
1225 sc->suspending = 0;
1226
1227 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm");
1228 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl");
1229 return 0;
1230 }
1231
1232 static int
1233 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td)
1234 {
1235 struct apm_softc *sc = &apm_softc;
1236 int ctl = APMDEV(dev);
1237
1238 if (sc == NULL || sc->initialized == 0)
1239 return (ENXIO);
1240
1241 switch (ctl) {
1242 case APMDEV_CTL:
1243 if (!(flag & FWRITE))
1244 return EINVAL;
1245 if (sc->sc_flags & SCFLAG_OCTL)
1246 return EBUSY;
1247 sc->sc_flags |= SCFLAG_OCTL;
1248 bzero(sc->event_filter, sizeof sc->event_filter);
1249 break;
1250 case APMDEV_NORMAL:
1251 sc->sc_flags |= SCFLAG_ONORMAL;
1252 break;
1253 default:
1254 return ENXIO;
1255 break;
1256 }
1257 return 0;
1258 }
1259
1260 static int
1261 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td)
1262 {
1263 struct apm_softc *sc = &apm_softc;
1264 int ctl = APMDEV(dev);
1265
1266 switch (ctl) {
1267 case APMDEV_CTL:
1268 apm_lastreq_rejected();
1269 sc->sc_flags &= ~SCFLAG_OCTL;
1270 bzero(sc->event_filter, sizeof sc->event_filter);
1271 break;
1272 case APMDEV_NORMAL:
1273 sc->sc_flags &= ~SCFLAG_ONORMAL;
1274 break;
1275 }
1276 if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
1277 sc->event_count = 0;
1278 sc->event_ptr = 0;
1279 }
1280 return 0;
1281 }
1282
1283 static int
1284 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1285 {
1286 struct apm_softc *sc = &apm_softc;
1287 struct apm_bios_arg *args;
1288 int error = 0;
1289 int ret;
1290 int newstate;
1291
1292 if (sc == NULL || sc->initialized == 0)
1293 return (ENXIO);
1294
1295 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd);
1296 switch (cmd) {
1297 case APMIO_SUSPEND:
1298 if (!(flag & FWRITE))
1299 return (EPERM);
1300 if (sc->active)
1301 apm_suspend(PMST_SUSPEND);
1302 else
1303 error = EINVAL;
1304 break;
1305
1306 case APMIO_STANDBY:
1307 if (!(flag & FWRITE))
1308 return (EPERM);
1309 if (sc->active)
1310 apm_suspend(PMST_STANDBY);
1311 else
1312 error = EINVAL;
1313 break;
1314
1315 case APMIO_GETINFO_OLD:
1316 {
1317 struct apm_info info;
1318 apm_info_old_t aiop;
1319
1320 if (apm_get_info(&info))
1321 error = ENXIO;
1322 aiop = (apm_info_old_t)addr;
1323 aiop->ai_major = info.ai_major;
1324 aiop->ai_minor = info.ai_minor;
1325 aiop->ai_acline = info.ai_acline;
1326 aiop->ai_batt_stat = info.ai_batt_stat;
1327 aiop->ai_batt_life = info.ai_batt_life;
1328 aiop->ai_status = info.ai_status;
1329 }
1330 break;
1331 case APMIO_GETINFO:
1332 if (apm_get_info((apm_info_t)addr))
1333 error = ENXIO;
1334 break;
1335 case APMIO_GETPWSTATUS:
1336 if (apm_get_pwstatus((apm_pwstatus_t)addr))
1337 error = ENXIO;
1338 break;
1339 case APMIO_ENABLE:
1340 if (!(flag & FWRITE))
1341 return (EPERM);
1342 apm_event_enable();
1343 break;
1344 case APMIO_DISABLE:
1345 if (!(flag & FWRITE))
1346 return (EPERM);
1347 apm_event_disable();
1348 break;
1349 case APMIO_HALTCPU:
1350 if (!(flag & FWRITE))
1351 return (EPERM);
1352 apm_halt_cpu();
1353 break;
1354 case APMIO_NOTHALTCPU:
1355 if (!(flag & FWRITE))
1356 return (EPERM);
1357 apm_not_halt_cpu();
1358 break;
1359 case APMIO_DISPLAY:
1360 if (!(flag & FWRITE))
1361 return (EPERM);
1362 newstate = *(int *)addr;
1363 if (apm_display(newstate))
1364 error = ENXIO;
1365 break;
1366 case APMIO_BIOS:
1367 if (!(flag & FWRITE))
1368 return (EPERM);
1369 /* XXX compatibility with the old interface */
1370 args = (struct apm_bios_arg *)addr;
1371 sc->bios.r.eax = args->eax;
1372 sc->bios.r.ebx = args->ebx;
1373 sc->bios.r.ecx = args->ecx;
1374 sc->bios.r.edx = args->edx;
1375 sc->bios.r.esi = args->esi;
1376 sc->bios.r.edi = args->edi;
1377 if ((ret = apm_bioscall())) {
1378 /*
1379 * Return code 1 means bios call was unsuccessful.
1380 * Error code is stored in %ah.
1381 * Return code -1 means bios call was unsupported
1382 * in the APM BIOS version.
1383 */
1384 if (ret == -1) {
1385 error = EINVAL;
1386 }
1387 } else {
1388 /*
1389 * Return code 0 means bios call was successful.
1390 * We need only %al and can discard %ah.
1391 */
1392 sc->bios.r.eax &= 0xff;
1393 }
1394 args->eax = sc->bios.r.eax;
1395 args->ebx = sc->bios.r.ebx;
1396 args->ecx = sc->bios.r.ecx;
1397 args->edx = sc->bios.r.edx;
1398 args->esi = sc->bios.r.esi;
1399 args->edi = sc->bios.r.edi;
1400 break;
1401 default:
1402 error = EINVAL;
1403 break;
1404 }
1405
1406 /* for /dev/apmctl */
1407 if (APMDEV(dev) == APMDEV_CTL) {
1408 struct apm_event_info *evp;
1409 int i;
1410
1411 error = 0;
1412 switch (cmd) {
1413 case APMIO_NEXTEVENT:
1414 if (!sc->event_count) {
1415 error = EAGAIN;
1416 } else {
1417 evp = (struct apm_event_info *)addr;
1418 i = sc->event_ptr + APM_NEVENTS - sc->event_count;
1419 i %= APM_NEVENTS;
1420 *evp = sc->event_list[i];
1421 sc->event_count--;
1422 }
1423 break;
1424 case APMIO_REJECTLASTREQ:
1425 if (apm_lastreq_rejected()) {
1426 error = EINVAL;
1427 }
1428 break;
1429 default:
1430 error = EINVAL;
1431 break;
1432 }
1433 }
1434
1435 return error;
1436 }
1437
1438 static int
1439 apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
1440 {
1441 struct apm_softc *sc = &apm_softc;
1442 u_int event_type;
1443 int error;
1444 u_char enabled;
1445
1446 if (APMDEV(dev) != APMDEV_CTL)
1447 return(ENODEV);
1448 if (uio->uio_resid != sizeof(u_int))
1449 return(E2BIG);
1450
1451 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
1452 return(error);
1453
1454 if (event_type < 0 || event_type >= APM_NPMEV)
1455 return(EINVAL);
1456
1457 if (sc->event_filter[event_type] == 0) {
1458 enabled = 1;
1459 } else {
1460 enabled = 0;
1461 }
1462 sc->event_filter[event_type] = enabled;
1463 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
1464
1465 return uio->uio_resid;
1466 }
1467
1468 static int
1469 apmpoll(struct cdev *dev, int events, struct thread *td)
1470 {
1471 struct apm_softc *sc = &apm_softc;
1472 int revents = 0;
1473
1474 if (events & (POLLIN | POLLRDNORM)) {
1475 if (sc->event_count) {
1476 revents |= events & (POLLIN | POLLRDNORM);
1477 } else {
1478 selrecord(td, &sc->sc_rsel);
1479 }
1480 }
1481
1482 return (revents);
1483 }
1484
1485 static device_method_t apm_methods[] = {
1486 /* Device interface */
1487 DEVMETHOD(device_identify, apm_identify),
1488 DEVMETHOD(device_probe, apm_probe),
1489 DEVMETHOD(device_attach, apm_attach),
1490
1491 { 0, 0 }
1492 };
1493
1494 static driver_t apm_driver = {
1495 "apm",
1496 apm_methods,
1497 1, /* no softc (XXX) */
1498 };
1499
1500 static devclass_t apm_devclass;
1501
1502 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0);
1503 MODULE_VERSION(apm, 1);
1504
1505 static int
1506 apm_pm_func(u_long cmd, void *arg, ...)
1507 {
1508 int state, apm_state;
1509 int error;
1510 va_list ap;
1511
1512 error = 0;
1513 switch (cmd) {
1514 case POWER_CMD_SUSPEND:
1515 va_start(ap, arg);
1516 state = va_arg(ap, int);
1517 va_end(ap);
1518
1519 switch (state) {
1520 case POWER_SLEEP_STATE_STANDBY:
1521 apm_state = PMST_STANDBY;
1522 break;
1523 case POWER_SLEEP_STATE_SUSPEND:
1524 case POWER_SLEEP_STATE_HIBERNATE:
1525 apm_state = PMST_SUSPEND;
1526 break;
1527 default:
1528 error = EINVAL;
1529 goto out;
1530 }
1531
1532 apm_suspend(apm_state);
1533 break;
1534
1535 default:
1536 error = EINVAL;
1537 goto out;
1538 }
1539
1540 out:
1541 return (error);
1542 }
1543
1544 static void
1545 apm_pm_register(void *arg)
1546 {
1547
1548 if (!resource_disabled("apm", 0))
1549 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL);
1550 }
1551
1552 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);
Cache object: 65b1b754cfe5e88430a5e386c4cce559
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