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: src/sys/i386/bios/apm.c,v 1.142.2.2 2005/01/31 23:26:02 imp Exp $");
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)
482 return;
483
484 apm_op_inprog = 0;
485 sc->suspends = sc->suspend_countdown = 0;
486
487 if (sc->initialized) {
488 error = DEVICE_SUSPEND(root_bus);
489 if (error) {
490 DEVICE_RESUME(root_bus);
491 } else {
492 apm_execute_hook(hook[APM_HOOK_SUSPEND]);
493 if (apm_suspend_system(PMST_SUSPEND) == 0) {
494 sc->suspending = 1;
495 apm_processevent();
496 } else {
497 /* Failure, 'resume' the system again */
498 apm_execute_hook(hook[APM_HOOK_RESUME]);
499 DEVICE_RESUME(root_bus);
500 }
501 }
502 }
503 }
504
505 static void
506 apm_do_standby(void)
507 {
508 struct apm_softc *sc = &apm_softc;
509
510 if (!sc)
511 return;
512
513 apm_op_inprog = 0;
514 sc->standbys = sc->standby_countdown = 0;
515
516 if (sc->initialized) {
517 /*
518 * As far as standby, we don't need to execute
519 * all of suspend hooks.
520 */
521 if (apm_suspend_system(PMST_STANDBY) == 0)
522 apm_processevent();
523 }
524 }
525
526 static void
527 apm_lastreq_notify(void)
528 {
529 struct apm_softc *sc = &apm_softc;
530
531 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
532 sc->bios.r.ebx = PMDV_ALLDEV;
533 sc->bios.r.ecx = PMST_LASTREQNOTIFY;
534 sc->bios.r.edx = 0;
535 apm_bioscall();
536 }
537
538 static int
539 apm_lastreq_rejected(void)
540 {
541 struct apm_softc *sc = &apm_softc;
542
543 if (apm_op_inprog == 0) {
544 return 1; /* no operation in progress */
545 }
546
547 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
548 sc->bios.r.ebx = PMDV_ALLDEV;
549 sc->bios.r.ecx = PMST_LASTREQREJECT;
550 sc->bios.r.edx = 0;
551
552 if (apm_bioscall()) {
553 APM_DPRINT("apm_lastreq_rejected: failed\n");
554 return 1;
555 }
556 apm_op_inprog = 0;
557 return 0;
558 }
559
560 /*
561 * Public interface to the suspend/resume:
562 *
563 * Execute suspend and resume hook before and after sleep, respectively.
564 *
565 */
566
567 void
568 apm_suspend(int state)
569 {
570 struct apm_softc *sc = &apm_softc;
571
572 if (!sc->initialized)
573 return;
574
575 switch (state) {
576 case PMST_SUSPEND:
577 if (sc->suspends)
578 return;
579 sc->suspends++;
580 sc->suspend_countdown = apm_suspend_delay;
581 break;
582 case PMST_STANDBY:
583 if (sc->standbys)
584 return;
585 sc->standbys++;
586 sc->standby_countdown = apm_standby_delay;
587 break;
588 default:
589 printf("apm_suspend: Unknown Suspend state 0x%x\n", state);
590 return;
591 }
592
593 apm_op_inprog++;
594 apm_lastreq_notify();
595 }
596
597 static void
598 apm_resume(void)
599 {
600 struct apm_softc *sc = &apm_softc;
601
602 if (!sc)
603 return;
604
605 if (sc->suspending == 0)
606 return;
607
608 sc->suspending = 0;
609 if (sc->initialized) {
610 apm_execute_hook(hook[APM_HOOK_RESUME]);
611 DEVICE_RESUME(root_bus);
612 }
613 }
614
615
616 /* get power status per battery */
617 static int
618 apm_get_pwstatus(apm_pwstatus_t app)
619 {
620 struct apm_softc *sc = &apm_softc;
621
622 if (app->ap_device != PMDV_ALLDEV &&
623 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
624 return 1;
625
626 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
627 sc->bios.r.ebx = app->ap_device;
628 sc->bios.r.ecx = 0;
629 sc->bios.r.edx = 0xffff; /* default to unknown battery time */
630
631 if (apm_bioscall())
632 return 1;
633
634 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff;
635 app->ap_batt_stat = sc->bios.r.ebx & 0xff;
636 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff;
637 app->ap_batt_life = sc->bios.r.ecx & 0xff;
638 sc->bios.r.edx &= 0xffff;
639 if (apm_swab_batt_minutes)
640 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000;
641 if (sc->bios.r.edx == 0xffff) /* Time is unknown */
642 app->ap_batt_time = -1;
643 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */
644 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60;
645 else /* Time is in seconds */
646 app->ap_batt_time = sc->bios.r.edx;
647
648 return 0;
649 }
650
651
652 /* get APM information */
653 static int
654 apm_get_info(apm_info_t aip)
655 {
656 struct apm_softc *sc = &apm_softc;
657 struct apm_pwstatus aps;
658
659 bzero(&aps, sizeof(aps));
660 aps.ap_device = PMDV_ALLDEV;
661 if (apm_get_pwstatus(&aps))
662 return 1;
663
664 aip->ai_infoversion = 1;
665 aip->ai_acline = aps.ap_acline;
666 aip->ai_batt_stat = aps.ap_batt_stat;
667 aip->ai_batt_life = aps.ap_batt_life;
668 aip->ai_batt_time = aps.ap_batt_time;
669 aip->ai_major = (u_int)sc->majorversion;
670 aip->ai_minor = (u_int)sc->minorversion;
671 aip->ai_status = (u_int)sc->active;
672
673 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES;
674 sc->bios.r.ebx = 0;
675 sc->bios.r.ecx = 0;
676 sc->bios.r.edx = 0;
677 if (apm_bioscall()) {
678 aip->ai_batteries = 0xffffffff; /* Unknown */
679 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */
680 } else {
681 aip->ai_batteries = sc->bios.r.ebx & 0xff;
682 aip->ai_capabilities = sc->bios.r.ecx & 0xff;
683 }
684
685 bzero(aip->ai_spare, sizeof aip->ai_spare);
686
687 return 0;
688 }
689
690
691 /* inform APM BIOS that CPU is idle */
692 void
693 apm_cpu_idle(void)
694 {
695 struct apm_softc *sc = &apm_softc;
696
697 if (sc->active) {
698
699 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE;
700 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
701 (void) apm_bioscall();
702 }
703 /*
704 * Some APM implementation halts CPU in BIOS, whenever
705 * "CPU-idle" function are invoked, but swtch() of
706 * FreeBSD halts CPU, therefore, CPU is halted twice
707 * in the sched loop. It makes the interrupt latency
708 * terribly long and be able to cause a serious problem
709 * in interrupt processing. We prevent it by removing
710 * "hlt" operation from swtch() and managed it under
711 * APM driver.
712 */
713 if (!sc->active || sc->always_halt_cpu)
714 halt(); /* wait for interrupt */
715 }
716
717 /* inform APM BIOS that CPU is busy */
718 void
719 apm_cpu_busy(void)
720 {
721 struct apm_softc *sc = &apm_softc;
722
723 /*
724 * The APM specification says this is only necessary if your BIOS
725 * slows down the processor in the idle task, otherwise it's not
726 * necessary.
727 */
728 if (sc->slow_idle_cpu && sc->active) {
729
730 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY;
731 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
732 apm_bioscall();
733 }
734 }
735
736
737 /*
738 * APM timeout routine:
739 *
740 * This routine is automatically called by timer once per second.
741 */
742
743 static void
744 apm_timeout(void *dummy)
745 {
746 struct apm_softc *sc = &apm_softc;
747
748 if (apm_op_inprog)
749 apm_lastreq_notify();
750
751 if (sc->standbys && sc->standby_countdown-- <= 0)
752 apm_do_standby();
753
754 if (sc->suspends && sc->suspend_countdown-- <= 0)
755 apm_do_suspend();
756
757 if (!sc->bios_busy)
758 apm_processevent();
759
760 if (sc->active == 1)
761 /* Run slightly more oftan than 1 Hz */
762 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1);
763 }
764
765 /* enable APM BIOS */
766 static void
767 apm_event_enable(void)
768 {
769 struct apm_softc *sc = &apm_softc;
770
771 APM_DPRINT("called apm_event_enable()\n");
772 if (sc->initialized) {
773 sc->active = 1;
774 apm_timeout(sc);
775 }
776 }
777
778 /* disable APM BIOS */
779 static void
780 apm_event_disable(void)
781 {
782 struct apm_softc *sc = &apm_softc;
783
784 APM_DPRINT("called apm_event_disable()\n");
785 if (sc->initialized) {
786 untimeout(apm_timeout, NULL, apm_timeout_ch);
787 sc->active = 0;
788 }
789 }
790
791 /* halt CPU in scheduling loop */
792 static void
793 apm_halt_cpu(void)
794 {
795 struct apm_softc *sc = &apm_softc;
796
797 if (sc->initialized)
798 sc->always_halt_cpu = 1;
799 }
800
801 /* don't halt CPU in scheduling loop */
802 static void
803 apm_not_halt_cpu(void)
804 {
805 struct apm_softc *sc = &apm_softc;
806
807 if (sc->initialized)
808 sc->always_halt_cpu = 0;
809 }
810
811 /* device driver definitions */
812
813 /*
814 * Module event
815 */
816
817 static int
818 apm_modevent(struct module *mod, int event, void *junk)
819 {
820
821 switch (event) {
822 case MOD_LOAD:
823 if (!cold)
824 return (EPERM);
825 break;
826 case MOD_UNLOAD:
827 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM)
828 return (EBUSY);
829 break;
830 default:
831 break;
832 }
833
834 return (0);
835 }
836
837 /*
838 * Create "connection point"
839 */
840 static void
841 apm_identify(driver_t *driver, device_t parent)
842 {
843 device_t child;
844
845 if (!cold) {
846 printf("Don't load this driver from userland!!\n");
847 return;
848 }
849
850 if (resource_disabled("apm", 0))
851 return;
852
853 child = BUS_ADD_CHILD(parent, 0, "apm", 0);
854 if (child == NULL)
855 panic("apm_identify");
856 }
857
858 /*
859 * probe for APM BIOS
860 */
861 static int
862 apm_probe(device_t dev)
863 {
864 #define APM_KERNBASE KERNBASE
865 struct vm86frame vmf;
866 struct apm_softc *sc = &apm_softc;
867 #ifdef PC98
868 int rid;
869 #endif
870
871 device_set_desc(dev, "APM BIOS");
872 if (device_get_unit(dev) > 0) {
873 printf("apm: Only one APM driver supported.\n");
874 return ENXIO;
875 }
876
877 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
878 power_pm_get_type() != POWER_PM_TYPE_APM) {
879 printf("apm: Other PM system enabled.\n");
880 return ENXIO;
881 }
882
883 bzero(&vmf, sizeof(struct vm86frame)); /* safety */
884 bzero(&apm_softc, sizeof(apm_softc));
885 vmf.vmf_ah = APM_BIOS;
886 vmf.vmf_al = APM_INSTCHECK;
887 vmf.vmf_bx = 0;
888 if (vm86_intcall(APM_INT, &vmf))
889 return ENXIO; /* APM not found */
890 if (vmf.vmf_bx != 0x504d) {
891 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
892 return ENXIO;
893 }
894 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
895 printf("apm: protected mode connections are not supported\n");
896 return ENXIO;
897 }
898
899 apm_version = vmf.vmf_ax;
900 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
901 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
902 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
903
904 vmf.vmf_ah = APM_BIOS;
905 vmf.vmf_al = APM_DISCONNECT;
906 vmf.vmf_bx = 0;
907 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */
908
909 #ifdef PC98
910 /* PC98 have bogos APM 32bit BIOS */
911 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0)
912 return ENXIO;
913 rid = 0;
914 bus_set_resource(dev, SYS_RES_IOPORT, rid,
915 APM_NECSMM_PORT, APM_NECSMM_PORTSZ);
916 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
917 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
918 if (sc->sc_res == NULL) {
919 printf("apm: cannot open NEC smm device\n");
920 return ENXIO;
921 }
922 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res);
923
924 vmf.vmf_ah = APM_BIOS;
925 vmf.vmf_al = APM_PROT32CONNECT;
926 vmf.vmf_bx = 0;
927 if (vm86_intcall(APM_INT, &vmf)) {
928 printf("apm: 32-bit connection error.\n");
929 return (ENXIO);
930 }
931
932 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
933 sc->bios.seg.code32.limit = 0xffff;
934 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
935 sc->bios.seg.code16.limit = 0xffff;
936 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
937 sc->bios.seg.data.limit = 0xffff;
938 sc->bios.entry = vmf.vmf_ebx;
939 sc->connectmode = APM_PROT32CONNECT;
940 #else
941 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
942 vmf.vmf_ah = APM_BIOS;
943 vmf.vmf_al = APM_PROT32CONNECT;
944 vmf.vmf_bx = 0;
945 if (vm86_intcall(APM_INT, &vmf)) {
946 printf("apm: 32-bit connection error.\n");
947 return (ENXIO);
948 }
949 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
950 sc->bios.seg.code32.limit = 0xffff;
951 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
952 sc->bios.seg.code16.limit = 0xffff;
953 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
954 sc->bios.seg.data.limit = 0xffff;
955 sc->bios.entry = vmf.vmf_ebx;
956 sc->connectmode = APM_PROT32CONNECT;
957 } else {
958 /* use 16-bit connection */
959 vmf.vmf_ah = APM_BIOS;
960 vmf.vmf_al = APM_PROT16CONNECT;
961 vmf.vmf_bx = 0;
962 if (vm86_intcall(APM_INT, &vmf)) {
963 printf("apm: 16-bit connection error.\n");
964 return (ENXIO);
965 }
966 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
967 sc->bios.seg.code16.limit = 0xffff;
968 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
969 sc->bios.seg.data.limit = 0xffff;
970 sc->bios.entry = vmf.vmf_bx;
971 sc->connectmode = APM_PROT16CONNECT;
972 }
973 #endif
974 return(0);
975 }
976
977
978 /*
979 * return 0 if the user will notice and handle the event,
980 * return 1 if the kernel driver should do so.
981 */
982 static int
983 apm_record_event(struct apm_softc *sc, u_int event_type)
984 {
985 struct apm_event_info *evp;
986
987 if ((sc->sc_flags & SCFLAG_OPEN) == 0)
988 return 1; /* no user waiting */
989 if (sc->event_count == APM_NEVENTS)
990 return 1; /* overflow */
991 if (sc->event_filter[event_type] == 0)
992 return 1; /* not registered */
993 evp = &sc->event_list[sc->event_ptr];
994 sc->event_count++;
995 sc->event_ptr++;
996 sc->event_ptr %= APM_NEVENTS;
997 evp->type = event_type;
998 evp->index = ++apm_evindex;
999 selwakeuppri(&sc->sc_rsel, PZERO);
1000 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
1001 }
1002
1003 /* Power profile */
1004 static void
1005 apm_power_profile(struct apm_softc *sc)
1006 {
1007 int state;
1008 struct apm_info info;
1009 static int apm_acline = 0;
1010
1011 if (apm_get_info(&info))
1012 return;
1013
1014 if (apm_acline != info.ai_acline) {
1015 apm_acline = info.ai_acline;
1016 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY;
1017 power_profile_set_state(state);
1018 }
1019 }
1020
1021 /* Process APM event */
1022 static void
1023 apm_processevent(void)
1024 {
1025 int apm_event;
1026 struct apm_softc *sc = &apm_softc;
1027
1028 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
1029 APM_DPRINT("Received APM Event: " #symbol "\n");
1030
1031 do {
1032 apm_event = apm_getevent();
1033 switch (apm_event) {
1034 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
1035 if (apm_op_inprog == 0) {
1036 apm_op_inprog++;
1037 if (apm_record_event(sc, apm_event)) {
1038 apm_suspend(PMST_STANDBY);
1039 }
1040 }
1041 break;
1042 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ);
1043 if (apm_op_inprog == 0) {
1044 apm_op_inprog++;
1045 if (apm_record_event(sc, apm_event)) {
1046 apm_suspend(PMST_STANDBY);
1047 }
1048 }
1049 break;
1050 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
1051 apm_lastreq_notify();
1052 if (apm_op_inprog == 0) {
1053 apm_op_inprog++;
1054 if (apm_record_event(sc, apm_event)) {
1055 apm_do_suspend();
1056 }
1057 }
1058 return; /* XXX skip the rest */
1059 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
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_CRITSUSPEND);
1069 apm_do_suspend();
1070 break;
1071 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
1072 apm_record_event(sc, apm_event);
1073 apm_resume();
1074 break;
1075 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
1076 apm_record_event(sc, apm_event);
1077 apm_resume();
1078 break;
1079 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
1080 apm_record_event(sc, apm_event);
1081 break;
1082 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
1083 if (apm_record_event(sc, apm_event)) {
1084 apm_battery_low();
1085 apm_suspend(PMST_SUSPEND);
1086 }
1087 break;
1088 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
1089 apm_record_event(sc, apm_event);
1090 apm_power_profile(sc);
1091 break;
1092 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
1093 apm_record_event(sc, apm_event);
1094 inittodr(0); /* adjust time to RTC */
1095 break;
1096 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
1097 apm_record_event(sc, apm_event);
1098 apm_power_profile(sc);
1099 break;
1100 case PMEV_NOEVENT:
1101 break;
1102 default:
1103 printf("Unknown Original APM Event 0x%x\n", apm_event);
1104 break;
1105 }
1106 } while (apm_event != PMEV_NOEVENT);
1107 #ifdef PC98
1108 apm_disable_smm(sc);
1109 #endif
1110 }
1111
1112 /*
1113 * Attach APM:
1114 *
1115 * Initialize APM driver
1116 */
1117
1118 static int
1119 apm_attach(device_t dev)
1120 {
1121 struct apm_softc *sc = &apm_softc;
1122 int drv_version;
1123 #ifdef PC98
1124 int rid;
1125 #endif
1126
1127 if (device_get_flags(dev) & 0x20)
1128 statclock_disable = 1;
1129
1130 sc->initialized = 0;
1131
1132 /* Must be externally enabled */
1133 sc->active = 0;
1134
1135 /* Always call HLT in idle loop */
1136 sc->always_halt_cpu = 1;
1137
1138 getenv_int("debug.apm_debug", &apm_debug);
1139
1140 /* print bootstrap messages */
1141 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version);
1142 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n",
1143 sc->bios.seg.code16.base, sc->bios.seg.data.base);
1144 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
1145 sc->bios.entry, is_enabled(sc->slow_idle_cpu),
1146 is_enabled(!sc->disabled));
1147 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n",
1148 sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
1149
1150 #ifdef PC98
1151 rid = 0;
1152 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
1153 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
1154 if (sc->sc_res == NULL)
1155 panic("%s: counldn't map I/O ports", device_get_name(dev));
1156 sc->sc_iot = rman_get_bustag(sc->sc_res);
1157 sc->sc_ioh = rman_get_bushandle(sc->sc_res);
1158
1159 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110)
1160 apm_necsmm_addr = APM_NECSMM_PORT;
1161 else
1162 apm_necsmm_addr = 0;
1163 apm_necsmm_mask = ~APM_NECSMM_EN;
1164 #endif /* PC98 */
1165
1166 /*
1167 * In one test, apm bios version was 1.02; an attempt to register
1168 * a 1.04 driver resulted in a 1.00 connection! Registering a
1169 * 1.02 driver resulted in a 1.02 connection.
1170 */
1171 drv_version = apm_version > 0x102 ? 0x102 : apm_version;
1172 for (; drv_version > 0x100; drv_version--)
1173 if (apm_driver_version(drv_version) == 0)
1174 break;
1175 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 +
1176 ((drv_version & 0x000f) >> 0);
1177 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
1178 ((apm_version & 0x0f00) >> 8);
1179
1180 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
1181
1182 if (sc->intversion >= INTVERSION(1, 1))
1183 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
1184 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n",
1185 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
1186 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
1187 sc->majorversion, sc->minorversion);
1188
1189
1190 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
1191 /* enable power management */
1192 if (sc->disabled) {
1193 if (apm_enable_disable_pm(1)) {
1194 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n",
1195 (sc->bios.r.eax >> 8) & 0xff);
1196 }
1197 }
1198
1199 /* engage power managment (APM 1.1 or later) */
1200 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
1201 if (apm_engage_disengage_pm(1)) {
1202 APM_DPRINT("apm: *Warning* engage function failed err=[%x]",
1203 (sc->bios.r.eax >> 8) & 0xff);
1204 APM_DPRINT(" (Docked or using external power?).\n");
1205 }
1206 }
1207
1208 /* Power the system off using APM */
1209 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL,
1210 SHUTDOWN_PRI_LAST);
1211
1212 /* Register APM again to pass the correct argument of pm_func. */
1213 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc);
1214
1215 sc->initialized = 1;
1216 sc->suspending = 0;
1217
1218 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm");
1219 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl");
1220 return 0;
1221 }
1222
1223 static int
1224 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td)
1225 {
1226 struct apm_softc *sc = &apm_softc;
1227 int ctl = APMDEV(dev);
1228
1229 if (!sc->initialized)
1230 return (ENXIO);
1231
1232 switch (ctl) {
1233 case APMDEV_CTL:
1234 if (!(flag & FWRITE))
1235 return EINVAL;
1236 if (sc->sc_flags & SCFLAG_OCTL)
1237 return EBUSY;
1238 sc->sc_flags |= SCFLAG_OCTL;
1239 bzero(sc->event_filter, sizeof sc->event_filter);
1240 break;
1241 case APMDEV_NORMAL:
1242 sc->sc_flags |= SCFLAG_ONORMAL;
1243 break;
1244 default:
1245 return ENXIO;
1246 break;
1247 }
1248 return 0;
1249 }
1250
1251 static int
1252 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td)
1253 {
1254 struct apm_softc *sc = &apm_softc;
1255 int ctl = APMDEV(dev);
1256
1257 switch (ctl) {
1258 case APMDEV_CTL:
1259 apm_lastreq_rejected();
1260 sc->sc_flags &= ~SCFLAG_OCTL;
1261 bzero(sc->event_filter, sizeof sc->event_filter);
1262 break;
1263 case APMDEV_NORMAL:
1264 sc->sc_flags &= ~SCFLAG_ONORMAL;
1265 break;
1266 }
1267 if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
1268 sc->event_count = 0;
1269 sc->event_ptr = 0;
1270 }
1271 return 0;
1272 }
1273
1274 static int
1275 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1276 {
1277 struct apm_softc *sc = &apm_softc;
1278 struct apm_bios_arg *args;
1279 int error = 0;
1280 int ret;
1281 int newstate;
1282
1283 if (!sc->initialized)
1284 return (ENXIO);
1285 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd);
1286 switch (cmd) {
1287 case APMIO_SUSPEND:
1288 if (!(flag & FWRITE))
1289 return (EPERM);
1290 if (sc->active)
1291 apm_suspend(PMST_SUSPEND);
1292 else
1293 error = EINVAL;
1294 break;
1295
1296 case APMIO_STANDBY:
1297 if (!(flag & FWRITE))
1298 return (EPERM);
1299 if (sc->active)
1300 apm_suspend(PMST_STANDBY);
1301 else
1302 error = EINVAL;
1303 break;
1304
1305 case APMIO_GETINFO_OLD:
1306 {
1307 struct apm_info info;
1308 apm_info_old_t aiop;
1309
1310 if (apm_get_info(&info))
1311 error = ENXIO;
1312 aiop = (apm_info_old_t)addr;
1313 aiop->ai_major = info.ai_major;
1314 aiop->ai_minor = info.ai_minor;
1315 aiop->ai_acline = info.ai_acline;
1316 aiop->ai_batt_stat = info.ai_batt_stat;
1317 aiop->ai_batt_life = info.ai_batt_life;
1318 aiop->ai_status = info.ai_status;
1319 }
1320 break;
1321 case APMIO_GETINFO:
1322 if (apm_get_info((apm_info_t)addr))
1323 error = ENXIO;
1324 break;
1325 case APMIO_GETPWSTATUS:
1326 if (apm_get_pwstatus((apm_pwstatus_t)addr))
1327 error = ENXIO;
1328 break;
1329 case APMIO_ENABLE:
1330 if (!(flag & FWRITE))
1331 return (EPERM);
1332 apm_event_enable();
1333 break;
1334 case APMIO_DISABLE:
1335 if (!(flag & FWRITE))
1336 return (EPERM);
1337 apm_event_disable();
1338 break;
1339 case APMIO_HALTCPU:
1340 if (!(flag & FWRITE))
1341 return (EPERM);
1342 apm_halt_cpu();
1343 break;
1344 case APMIO_NOTHALTCPU:
1345 if (!(flag & FWRITE))
1346 return (EPERM);
1347 apm_not_halt_cpu();
1348 break;
1349 case APMIO_DISPLAY:
1350 if (!(flag & FWRITE))
1351 return (EPERM);
1352 newstate = *(int *)addr;
1353 if (apm_display(newstate))
1354 error = ENXIO;
1355 break;
1356 case APMIO_BIOS:
1357 if (!(flag & FWRITE))
1358 return (EPERM);
1359 /* XXX compatibility with the old interface */
1360 args = (struct apm_bios_arg *)addr;
1361 sc->bios.r.eax = args->eax;
1362 sc->bios.r.ebx = args->ebx;
1363 sc->bios.r.ecx = args->ecx;
1364 sc->bios.r.edx = args->edx;
1365 sc->bios.r.esi = args->esi;
1366 sc->bios.r.edi = args->edi;
1367 if ((ret = apm_bioscall())) {
1368 /*
1369 * Return code 1 means bios call was unsuccessful.
1370 * Error code is stored in %ah.
1371 * Return code -1 means bios call was unsupported
1372 * in the APM BIOS version.
1373 */
1374 if (ret == -1) {
1375 error = EINVAL;
1376 }
1377 } else {
1378 /*
1379 * Return code 0 means bios call was successful.
1380 * We need only %al and can discard %ah.
1381 */
1382 sc->bios.r.eax &= 0xff;
1383 }
1384 args->eax = sc->bios.r.eax;
1385 args->ebx = sc->bios.r.ebx;
1386 args->ecx = sc->bios.r.ecx;
1387 args->edx = sc->bios.r.edx;
1388 args->esi = sc->bios.r.esi;
1389 args->edi = sc->bios.r.edi;
1390 break;
1391 default:
1392 error = EINVAL;
1393 break;
1394 }
1395
1396 /* for /dev/apmctl */
1397 if (APMDEV(dev) == APMDEV_CTL) {
1398 struct apm_event_info *evp;
1399 int i;
1400
1401 error = 0;
1402 switch (cmd) {
1403 case APMIO_NEXTEVENT:
1404 if (!sc->event_count) {
1405 error = EAGAIN;
1406 } else {
1407 evp = (struct apm_event_info *)addr;
1408 i = sc->event_ptr + APM_NEVENTS - sc->event_count;
1409 i %= APM_NEVENTS;
1410 *evp = sc->event_list[i];
1411 sc->event_count--;
1412 }
1413 break;
1414 case APMIO_REJECTLASTREQ:
1415 if (apm_lastreq_rejected()) {
1416 error = EINVAL;
1417 }
1418 break;
1419 default:
1420 error = EINVAL;
1421 break;
1422 }
1423 }
1424
1425 return error;
1426 }
1427
1428 static int
1429 apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
1430 {
1431 struct apm_softc *sc = &apm_softc;
1432 u_int event_type;
1433 int error;
1434 u_char enabled;
1435
1436 if (APMDEV(dev) != APMDEV_CTL)
1437 return(ENODEV);
1438 if (uio->uio_resid != sizeof(u_int))
1439 return(E2BIG);
1440
1441 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
1442 return(error);
1443
1444 if (event_type < 0 || event_type >= APM_NPMEV)
1445 return(EINVAL);
1446
1447 if (sc->event_filter[event_type] == 0) {
1448 enabled = 1;
1449 } else {
1450 enabled = 0;
1451 }
1452 sc->event_filter[event_type] = enabled;
1453 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
1454
1455 return uio->uio_resid;
1456 }
1457
1458 static int
1459 apmpoll(struct cdev *dev, int events, struct thread *td)
1460 {
1461 struct apm_softc *sc = &apm_softc;
1462 int revents = 0;
1463
1464 if (events & (POLLIN | POLLRDNORM)) {
1465 if (sc->event_count) {
1466 revents |= events & (POLLIN | POLLRDNORM);
1467 } else {
1468 selrecord(td, &sc->sc_rsel);
1469 }
1470 }
1471
1472 return (revents);
1473 }
1474
1475 static device_method_t apm_methods[] = {
1476 /* Device interface */
1477 DEVMETHOD(device_identify, apm_identify),
1478 DEVMETHOD(device_probe, apm_probe),
1479 DEVMETHOD(device_attach, apm_attach),
1480
1481 { 0, 0 }
1482 };
1483
1484 static driver_t apm_driver = {
1485 "apm",
1486 apm_methods,
1487 1, /* no softc (XXX) */
1488 };
1489
1490 static devclass_t apm_devclass;
1491
1492 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0);
1493 MODULE_VERSION(apm, 1);
1494
1495 static int
1496 apm_pm_func(u_long cmd, void *arg, ...)
1497 {
1498 int state, apm_state;
1499 int error;
1500 va_list ap;
1501
1502 error = 0;
1503 switch (cmd) {
1504 case POWER_CMD_SUSPEND:
1505 va_start(ap, arg);
1506 state = va_arg(ap, int);
1507 va_end(ap);
1508
1509 switch (state) {
1510 case POWER_SLEEP_STATE_STANDBY:
1511 apm_state = PMST_STANDBY;
1512 break;
1513 case POWER_SLEEP_STATE_SUSPEND:
1514 case POWER_SLEEP_STATE_HIBERNATE:
1515 apm_state = PMST_SUSPEND;
1516 break;
1517 default:
1518 error = EINVAL;
1519 goto out;
1520 }
1521
1522 apm_suspend(apm_state);
1523 break;
1524
1525 default:
1526 error = EINVAL;
1527 goto out;
1528 }
1529
1530 out:
1531 return (error);
1532 }
1533
1534 static void
1535 apm_pm_register(void *arg)
1536 {
1537
1538 if (!resource_disabled("apm", 0))
1539 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL);
1540 }
1541
1542 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);
Cache object: ac25af0a2086afde151d749b89db1477
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