FreeBSD/Linux Kernel Cross Reference
sys/pc98/apm/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 * $FreeBSD: releng/5.0/sys/pc98/apm/apm.c 105260 2002-10-16 15:44:41Z nyan $
19 */
20
21 #include <sys/param.h>
22 #include <sys/systm.h>
23 #include <sys/bus.h>
24 #include <sys/conf.h>
25 #include <sys/eventhandler.h>
26 #include <sys/fcntl.h>
27 #include <sys/kernel.h>
28 #include <sys/poll.h>
29 #include <sys/power.h>
30 #include <sys/reboot.h>
31 #include <sys/selinfo.h>
32 #include <sys/signalvar.h>
33 #include <sys/sysctl.h>
34 #include <sys/syslog.h>
35 #include <sys/time.h>
36 #include <sys/uio.h>
37
38 #include <machine/apm_bios.h>
39 #include <machine/bus.h>
40 #include <machine/clock.h>
41 #include <machine/pc/bios.h>
42 #include <machine/cpufunc.h>
43 #include <machine/resource.h>
44 #include <machine/segments.h>
45 #include <machine/stdarg.h>
46 #include <machine/vm86.h>
47
48 #include <sys/rman.h>
49
50 #include <vm/vm.h>
51 #include <vm/pmap.h>
52 #include <vm/vm_param.h>
53
54 #include <pc98/apm/apm.h>
55
56 /* Used by the apm_saver screen saver module */
57 int apm_display(int newstate);
58 struct apm_softc apm_softc;
59
60 static void apm_resume(void);
61 static int apm_bioscall(void);
62 static int apm_check_function_supported(u_int version, u_int func);
63
64 static int apm_pm_func(u_long, void*, ...);
65
66 static u_long apm_version;
67
68 int apm_evindex;
69
70 #define SCFLAG_ONORMAL 0x0000001
71 #define SCFLAG_OCTL 0x0000002
72 #define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL)
73
74 #define APMDEV(dev) (minor(dev)&0x0f)
75 #define APMDEV_NORMAL 0
76 #define APMDEV_CTL 8
77
78 #ifdef PC98
79 extern int bios32_apm98(struct bios_regs *, u_int, u_short);
80
81 /* PC98's SMM definition */
82 #define APM_NECSMM_PORT 0x6b8e
83 #define APM_NECSMM_PORTSZ 1
84 #define APM_NECSMM_EN 0x10
85 static __inline void apm_enable_smm(struct apm_softc *);
86 static __inline void apm_disable_smm(struct apm_softc *);
87 int apm_necsmm_addr;
88 u_int32_t apm_necsmm_mask;
89 #endif
90
91 static struct apmhook *hook[NAPM_HOOK]; /* XXX */
92
93 #define is_enabled(foo) ((foo) ? "enabled" : "disabled")
94
95 /* Map version number to integer (keeps ordering of version numbers) */
96 #define INTVERSION(major, minor) ((major)*100 + (minor))
97
98 static struct callout_handle apm_timeout_ch =
99 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch);
100
101 static timeout_t apm_timeout;
102 static d_open_t apmopen;
103 static d_close_t apmclose;
104 static d_write_t apmwrite;
105 static d_ioctl_t apmioctl;
106 static d_poll_t apmpoll;
107
108 #define CDEV_MAJOR 39
109 static struct cdevsw apm_cdevsw = {
110 /* open */ apmopen,
111 /* close */ apmclose,
112 /* read */ noread,
113 /* write */ apmwrite,
114 /* ioctl */ apmioctl,
115 /* poll */ apmpoll,
116 /* mmap */ nommap,
117 /* strategy */ nostrategy,
118 /* name */ "apm",
119 /* maj */ CDEV_MAJOR,
120 /* dump */ nodump,
121 /* psize */ nopsize,
122 /* flags */ 0,
123 };
124
125 static int apm_suspend_delay = 1;
126 static int apm_standby_delay = 1;
127 static int apm_debug = 0;
128
129 #define APM_DPRINT(args...) do { \
130 if (apm_debug) { \
131 printf(args); \
132 } \
133 } while (0)
134
135 SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, "");
136 SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, "");
137 SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, "");
138
139 #ifdef PC98
140 static __inline void
141 apm_enable_smm(sc)
142 struct apm_softc *sc;
143 {
144 bus_space_tag_t iot = sc->sc_iot;
145 bus_space_handle_t ioh = sc->sc_ioh;
146 if (apm_necsmm_addr != 0)
147 bus_space_write_1(iot, ioh, 0,
148 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask));
149 }
150
151 static __inline void
152 apm_disable_smm(sc)
153 struct apm_softc *sc;
154 {
155 bus_space_tag_t iot = sc->sc_iot;
156 bus_space_handle_t ioh = sc->sc_ioh;
157 if (apm_necsmm_addr != 0)
158 bus_space_write_1(iot, ioh, 0,
159 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask));
160 }
161 #endif
162
163 /*
164 * return 0 if the function successfull,
165 * return 1 if the function unsuccessfull,
166 * return -1 if the function unsupported.
167 */
168 static int
169 apm_bioscall(void)
170 {
171 struct apm_softc *sc = &apm_softc;
172 int errno = 0;
173 u_int apm_func = sc->bios.r.eax & 0xff;
174
175 if (!apm_check_function_supported(sc->intversion, apm_func)) {
176 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n",
177 apm_func, sc->majorversion, sc->minorversion);
178 return (-1);
179 }
180
181 sc->bios_busy = 1;
182 #ifdef PC98
183 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG);
184 if (bios32_apm98(&sc->bios.r, sc->bios.entry,
185 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0)
186 return 1;
187 #else
188 if (sc->connectmode == APM_PROT32CONNECT) {
189 set_bios_selectors(&sc->bios.seg,
190 BIOSCODE_FLAG | BIOSDATA_FLAG);
191 errno = bios32(&sc->bios.r,
192 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL));
193 } else {
194 errno = bios16(&sc->bios, NULL);
195 }
196 #endif
197 sc->bios_busy = 0;
198 return (errno);
199 }
200
201 /* check whether APM function is supported (1) or not (0). */
202 static int
203 apm_check_function_supported(u_int version, u_int func)
204 {
205 /* except driver version */
206 if (func == APM_DRVVERSION) {
207 return (1);
208 }
209 #ifdef PC98
210 if (func == APM_GETPWSTATUS) {
211 return (1);
212 }
213 #endif
214
215 switch (version) {
216 case INTVERSION(1, 0):
217 if (func > APM_GETPMEVENT) {
218 return (0); /* not supported */
219 }
220 break;
221 case INTVERSION(1, 1):
222 if (func > APM_ENGAGEDISENGAGEPM &&
223 func < APM_OEMFUNC) {
224 return (0); /* not supported */
225 }
226 break;
227 case INTVERSION(1, 2):
228 break;
229 }
230
231 return (1); /* supported */
232 }
233
234 /* enable/disable power management */
235 static int
236 apm_enable_disable_pm(int enable)
237 {
238 struct apm_softc *sc = &apm_softc;
239
240 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
241
242 if (sc->intversion >= INTVERSION(1, 1))
243 sc->bios.r.ebx = PMDV_ALLDEV;
244 else
245 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */
246 sc->bios.r.ecx = enable;
247 sc->bios.r.edx = 0;
248 return (apm_bioscall());
249 }
250
251 /* register driver version (APM 1.1 or later) */
252 static int
253 apm_driver_version(int version)
254 {
255 struct apm_softc *sc = &apm_softc;
256
257 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION;
258 sc->bios.r.ebx = 0x0;
259 sc->bios.r.ecx = version;
260 sc->bios.r.edx = 0;
261
262 if (apm_bioscall() == 0 && sc->bios.r.eax == version)
263 return (0);
264
265 /* Some old BIOSes don't return the connection version in %ax. */
266 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION))
267 return (0);
268
269 return (1);
270 }
271
272 /* engage/disengage power management (APM 1.1 or later) */
273 static int
274 apm_engage_disengage_pm(int engage)
275 {
276 struct apm_softc *sc = &apm_softc;
277
278 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
279 sc->bios.r.ebx = PMDV_ALLDEV;
280 sc->bios.r.ecx = engage;
281 sc->bios.r.edx = 0;
282 return (apm_bioscall());
283 }
284
285 /* get PM event */
286 static u_int
287 apm_getevent(void)
288 {
289 struct apm_softc *sc = &apm_softc;
290
291 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT;
292
293 sc->bios.r.ebx = 0;
294 sc->bios.r.ecx = 0;
295 sc->bios.r.edx = 0;
296 if (apm_bioscall())
297 return (PMEV_NOEVENT);
298 return (sc->bios.r.ebx & 0xffff);
299 }
300
301 /* suspend entire system */
302 static int
303 apm_suspend_system(int state)
304 {
305 struct apm_softc *sc = &apm_softc;
306
307 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
308 sc->bios.r.ebx = PMDV_ALLDEV;
309 sc->bios.r.ecx = state;
310 sc->bios.r.edx = 0;
311
312 #ifdef PC98
313 apm_disable_smm(sc);
314 #endif
315 if (apm_bioscall()) {
316 printf("Entire system suspend failure: errcode = %d\n",
317 0xff & (sc->bios.r.eax >> 8));
318 return 1;
319 }
320 #ifdef PC98
321 apm_enable_smm(sc);
322 #endif
323 return 0;
324 }
325
326 /* Display control */
327 /*
328 * Experimental implementation: My laptop machine can't handle this function
329 * If your laptop can control the display via APM, please inform me.
330 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
331 */
332 int
333 apm_display(int newstate)
334 {
335 struct apm_softc *sc = &apm_softc;
336
337 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
338 sc->bios.r.ebx = PMDV_DISP0;
339 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
340 sc->bios.r.edx = 0;
341 if (apm_bioscall() == 0) {
342 return 0;
343 }
344
345 /* If failed, then try to blank all display devices instead. */
346 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
347 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */
348 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
349 sc->bios.r.edx = 0;
350 if (apm_bioscall() == 0) {
351 return 0;
352 }
353 printf("Display off failure: errcode = %d\n",
354 0xff & (sc->bios.r.eax >> 8));
355 return 1;
356 }
357
358 /*
359 * Turn off the entire system.
360 */
361 static void
362 apm_power_off(void *junk, int howto)
363 {
364 struct apm_softc *sc = &apm_softc;
365
366 /* Not halting powering off, or not active */
367 if (!(howto & RB_POWEROFF) || !apm_softc.active)
368 return;
369 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
370 sc->bios.r.ebx = PMDV_ALLDEV;
371 sc->bios.r.ecx = PMST_OFF;
372 sc->bios.r.edx = 0;
373 (void) apm_bioscall();
374 }
375
376 /* APM Battery low handler */
377 static void
378 apm_battery_low(void)
379 {
380 printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
381 }
382
383 /* APM hook manager */
384 static struct apmhook *
385 apm_add_hook(struct apmhook **list, struct apmhook *ah)
386 {
387 int s;
388 struct apmhook *p, *prev;
389
390 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name);
391
392 s = splhigh();
393 if (ah == NULL)
394 panic("illegal apm_hook!");
395 prev = NULL;
396 for (p = *list; p != NULL; prev = p, p = p->ah_next)
397 if (p->ah_order > ah->ah_order)
398 break;
399
400 if (prev == NULL) {
401 ah->ah_next = *list;
402 *list = ah;
403 } else {
404 ah->ah_next = prev->ah_next;
405 prev->ah_next = ah;
406 }
407 splx(s);
408 return ah;
409 }
410
411 static void
412 apm_del_hook(struct apmhook **list, struct apmhook *ah)
413 {
414 int s;
415 struct apmhook *p, *prev;
416
417 s = splhigh();
418 prev = NULL;
419 for (p = *list; p != NULL; prev = p, p = p->ah_next)
420 if (p == ah)
421 goto deleteit;
422 panic("Tried to delete unregistered apm_hook.");
423 goto nosuchnode;
424 deleteit:
425 if (prev != NULL)
426 prev->ah_next = p->ah_next;
427 else
428 *list = p->ah_next;
429 nosuchnode:
430 splx(s);
431 }
432
433
434 /* APM driver calls some functions automatically */
435 static void
436 apm_execute_hook(struct apmhook *list)
437 {
438 struct apmhook *p;
439
440 for (p = list; p != NULL; p = p->ah_next) {
441 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name);
442 if ((*(p->ah_fun))(p->ah_arg))
443 printf("Warning: APM hook \"%s\" failed", p->ah_name);
444 }
445 }
446
447
448 /* establish an apm hook */
449 struct apmhook *
450 apm_hook_establish(int apmh, struct apmhook *ah)
451 {
452 if (apmh < 0 || apmh >= NAPM_HOOK)
453 return NULL;
454
455 return apm_add_hook(&hook[apmh], ah);
456 }
457
458 /* disestablish an apm hook */
459 void
460 apm_hook_disestablish(int apmh, struct apmhook *ah)
461 {
462 if (apmh < 0 || apmh >= NAPM_HOOK)
463 return;
464
465 apm_del_hook(&hook[apmh], ah);
466 }
467
468 static int apm_record_event(struct apm_softc *, u_int);
469 static void apm_processevent(void);
470
471 static u_int apm_op_inprog = 0;
472
473 static void
474 apm_do_suspend(void)
475 {
476 struct apm_softc *sc = &apm_softc;
477 int error;
478
479 if (!sc)
480 return;
481
482 apm_op_inprog = 0;
483 sc->suspends = sc->suspend_countdown = 0;
484
485 if (sc->initialized) {
486 error = DEVICE_SUSPEND(root_bus);
487 if (error) {
488 DEVICE_RESUME(root_bus);
489 } else {
490 apm_execute_hook(hook[APM_HOOK_SUSPEND]);
491 if (apm_suspend_system(PMST_SUSPEND) == 0) {
492 sc->suspending = 1;
493 apm_processevent();
494 } else {
495 /* Failure, 'resume' the system again */
496 apm_execute_hook(hook[APM_HOOK_RESUME]);
497 DEVICE_RESUME(root_bus);
498 }
499 }
500 }
501 }
502
503 static void
504 apm_do_standby(void)
505 {
506 struct apm_softc *sc = &apm_softc;
507
508 if (!sc)
509 return;
510
511 apm_op_inprog = 0;
512 sc->standbys = sc->standby_countdown = 0;
513
514 if (sc->initialized) {
515 /*
516 * As far as standby, we don't need to execute
517 * all of suspend hooks.
518 */
519 if (apm_suspend_system(PMST_STANDBY) == 0)
520 apm_processevent();
521 }
522 }
523
524 static void
525 apm_lastreq_notify(void)
526 {
527 struct apm_softc *sc = &apm_softc;
528
529 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
530 sc->bios.r.ebx = PMDV_ALLDEV;
531 sc->bios.r.ecx = PMST_LASTREQNOTIFY;
532 sc->bios.r.edx = 0;
533 apm_bioscall();
534 }
535
536 static int
537 apm_lastreq_rejected(void)
538 {
539 struct apm_softc *sc = &apm_softc;
540
541 if (apm_op_inprog == 0) {
542 return 1; /* no operation in progress */
543 }
544
545 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
546 sc->bios.r.ebx = PMDV_ALLDEV;
547 sc->bios.r.ecx = PMST_LASTREQREJECT;
548 sc->bios.r.edx = 0;
549
550 if (apm_bioscall()) {
551 APM_DPRINT("apm_lastreq_rejected: failed\n");
552 return 1;
553 }
554 apm_op_inprog = 0;
555 return 0;
556 }
557
558 /*
559 * Public interface to the suspend/resume:
560 *
561 * Execute suspend and resume hook before and after sleep, respectively.
562 *
563 */
564
565 void
566 apm_suspend(int state)
567 {
568 struct apm_softc *sc = &apm_softc;
569
570 if (!sc->initialized)
571 return;
572
573 switch (state) {
574 case PMST_SUSPEND:
575 if (sc->suspends)
576 return;
577 sc->suspends++;
578 sc->suspend_countdown = apm_suspend_delay;
579 break;
580 case PMST_STANDBY:
581 if (sc->standbys)
582 return;
583 sc->standbys++;
584 sc->standby_countdown = apm_standby_delay;
585 break;
586 default:
587 printf("apm_suspend: Unknown Suspend state 0x%x\n", state);
588 return;
589 }
590
591 apm_op_inprog++;
592 apm_lastreq_notify();
593 }
594
595 static void
596 apm_resume(void)
597 {
598 struct apm_softc *sc = &apm_softc;
599
600 if (!sc)
601 return;
602
603 if (sc->suspending == 0)
604 return;
605
606 sc->suspending = 0;
607 if (sc->initialized) {
608 apm_execute_hook(hook[APM_HOOK_RESUME]);
609 DEVICE_RESUME(root_bus);
610 }
611 }
612
613
614 /* get power status per battery */
615 static int
616 apm_get_pwstatus(apm_pwstatus_t app)
617 {
618 struct apm_softc *sc = &apm_softc;
619
620 if (app->ap_device != PMDV_ALLDEV &&
621 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
622 return 1;
623
624 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
625 sc->bios.r.ebx = app->ap_device;
626 sc->bios.r.ecx = 0;
627 sc->bios.r.edx = 0xffff; /* default to unknown battery time */
628
629 if (apm_bioscall())
630 return 1;
631
632 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff;
633 app->ap_batt_stat = sc->bios.r.ebx & 0xff;
634 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff;
635 app->ap_batt_life = sc->bios.r.ecx & 0xff;
636 sc->bios.r.edx &= 0xffff;
637 if (sc->bios.r.edx == 0xffff) /* Time is unknown */
638 app->ap_batt_time = -1;
639 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */
640 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60;
641 else /* Time is in seconds */
642 app->ap_batt_time = sc->bios.r.edx;
643
644 return 0;
645 }
646
647
648 /* get APM information */
649 static int
650 apm_get_info(apm_info_t aip)
651 {
652 struct apm_softc *sc = &apm_softc;
653 struct apm_pwstatus aps;
654
655 bzero(&aps, sizeof(aps));
656 aps.ap_device = PMDV_ALLDEV;
657 if (apm_get_pwstatus(&aps))
658 return 1;
659
660 aip->ai_infoversion = 1;
661 aip->ai_acline = aps.ap_acline;
662 aip->ai_batt_stat = aps.ap_batt_stat;
663 aip->ai_batt_life = aps.ap_batt_life;
664 aip->ai_batt_time = aps.ap_batt_time;
665 aip->ai_major = (u_int)sc->majorversion;
666 aip->ai_minor = (u_int)sc->minorversion;
667 aip->ai_status = (u_int)sc->active;
668
669 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES;
670 sc->bios.r.ebx = 0;
671 sc->bios.r.ecx = 0;
672 sc->bios.r.edx = 0;
673 if (apm_bioscall()) {
674 aip->ai_batteries = -1; /* Unknown */
675 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */
676 } else {
677 aip->ai_batteries = sc->bios.r.ebx & 0xff;
678 aip->ai_capabilities = sc->bios.r.ecx & 0xf;
679 }
680
681 bzero(aip->ai_spare, sizeof aip->ai_spare);
682
683 return 0;
684 }
685
686
687 /* inform APM BIOS that CPU is idle */
688 void
689 apm_cpu_idle(void)
690 {
691 struct apm_softc *sc = &apm_softc;
692
693 if (sc->active) {
694
695 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE;
696 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
697 (void) apm_bioscall();
698 }
699 /*
700 * Some APM implementation halts CPU in BIOS, whenever
701 * "CPU-idle" function are invoked, but swtch() of
702 * FreeBSD halts CPU, therefore, CPU is halted twice
703 * in the sched loop. It makes the interrupt latency
704 * terribly long and be able to cause a serious problem
705 * in interrupt processing. We prevent it by removing
706 * "hlt" operation from swtch() and managed it under
707 * APM driver.
708 */
709 if (!sc->active || sc->always_halt_cpu)
710 halt(); /* wait for interrupt */
711 }
712
713 /* inform APM BIOS that CPU is busy */
714 void
715 apm_cpu_busy(void)
716 {
717 struct apm_softc *sc = &apm_softc;
718
719 /*
720 * The APM specification says this is only necessary if your BIOS
721 * slows down the processor in the idle task, otherwise it's not
722 * necessary.
723 */
724 if (sc->slow_idle_cpu && sc->active) {
725
726 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY;
727 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
728 apm_bioscall();
729 }
730 }
731
732
733 /*
734 * APM timeout routine:
735 *
736 * This routine is automatically called by timer once per second.
737 */
738
739 static void
740 apm_timeout(void *dummy)
741 {
742 struct apm_softc *sc = &apm_softc;
743
744 if (apm_op_inprog)
745 apm_lastreq_notify();
746
747 if (sc->standbys && sc->standby_countdown-- <= 0)
748 apm_do_standby();
749
750 if (sc->suspends && sc->suspend_countdown-- <= 0)
751 apm_do_suspend();
752
753 if (!sc->bios_busy)
754 apm_processevent();
755
756 if (sc->active == 1)
757 /* Run slightly more oftan than 1 Hz */
758 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1);
759 }
760
761 /* enable APM BIOS */
762 static void
763 apm_event_enable(void)
764 {
765 struct apm_softc *sc = &apm_softc;
766
767 APM_DPRINT("called apm_event_enable()\n");
768 if (sc->initialized) {
769 sc->active = 1;
770 apm_timeout(sc);
771 }
772 }
773
774 /* disable APM BIOS */
775 static void
776 apm_event_disable(void)
777 {
778 struct apm_softc *sc = &apm_softc;
779
780 APM_DPRINT("called apm_event_disable()\n");
781 if (sc->initialized) {
782 untimeout(apm_timeout, NULL, apm_timeout_ch);
783 sc->active = 0;
784 }
785 }
786
787 /* halt CPU in scheduling loop */
788 static void
789 apm_halt_cpu(void)
790 {
791 struct apm_softc *sc = &apm_softc;
792
793 if (sc->initialized)
794 sc->always_halt_cpu = 1;
795 }
796
797 /* don't halt CPU in scheduling loop */
798 static void
799 apm_not_halt_cpu(void)
800 {
801 struct apm_softc *sc = &apm_softc;
802
803 if (sc->initialized)
804 sc->always_halt_cpu = 0;
805 }
806
807 /* device driver definitions */
808
809 /*
810 * Module event
811 */
812
813 static int
814 apm_modevent(struct module *mod, int event, void *junk)
815 {
816
817 switch (event) {
818 case MOD_LOAD:
819 if (!cold)
820 return (EPERM);
821 break;
822 case MOD_UNLOAD:
823 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM)
824 return (EBUSY);
825 break;
826 default:
827 break;
828 }
829
830 return (0);
831 }
832
833 /*
834 * Create "connection point"
835 */
836 static void
837 apm_identify(driver_t *driver, device_t parent)
838 {
839 device_t child;
840
841 if (!cold) {
842 printf("Don't load this driver from userland!!\n");
843 return;
844 }
845
846 child = BUS_ADD_CHILD(parent, 0, "apm", 0);
847 if (child == NULL)
848 panic("apm_identify");
849 }
850
851 /*
852 * probe for APM BIOS
853 */
854 static int
855 apm_probe(device_t dev)
856 {
857 #define APM_KERNBASE KERNBASE
858 struct vm86frame vmf;
859 struct apm_softc *sc = &apm_softc;
860 int disabled, flags;
861 #ifdef PC98
862 int rid;
863 #endif
864
865 device_set_desc(dev, "APM BIOS");
866
867 if (resource_int_value("apm", 0, "disabled", &disabled) != 0)
868 disabled = 0;
869 if (disabled)
870 return ENXIO;
871
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 if (resource_int_value("apm", 0, "flags", &flags) != 0)
884 flags = 0;
885
886 bzero(&vmf, sizeof(struct vm86frame)); /* safety */
887 bzero(&apm_softc, sizeof(apm_softc));
888 vmf.vmf_ah = APM_BIOS;
889 vmf.vmf_al = APM_INSTCHECK;
890 vmf.vmf_bx = 0;
891 if (vm86_intcall(APM_INT, &vmf))
892 return ENXIO; /* APM not found */
893 if (vmf.vmf_bx != 0x504d) {
894 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
895 return ENXIO;
896 }
897 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
898 printf("apm: protected mode connections are not supported\n");
899 return ENXIO;
900 }
901
902 apm_version = vmf.vmf_ax;
903 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
904 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
905 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
906
907 vmf.vmf_ah = APM_BIOS;
908 vmf.vmf_al = APM_DISCONNECT;
909 vmf.vmf_bx = 0;
910 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */
911
912 #ifdef PC98
913 /* PC98 have bogos APM 32bit BIOS */
914 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0)
915 return ENXIO;
916 rid = 0;
917 bus_set_resource(dev, SYS_RES_IOPORT, rid,
918 APM_NECSMM_PORT, APM_NECSMM_PORTSZ);
919 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
920 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
921 if (sc->sc_res == NULL) {
922 printf("apm: cannot open NEC smm device\n");
923 return ENXIO;
924 }
925 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res);
926
927 vmf.vmf_ah = APM_BIOS;
928 vmf.vmf_al = APM_PROT32CONNECT;
929 vmf.vmf_bx = 0;
930 if (vm86_intcall(APM_INT, &vmf)) {
931 printf("apm: 32-bit connection error.\n");
932 return (ENXIO);
933 }
934
935 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
936 sc->bios.seg.code32.limit = 0xffff;
937 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
938 sc->bios.seg.code16.limit = 0xffff;
939 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
940 sc->bios.seg.data.limit = 0xffff;
941 sc->bios.entry = vmf.vmf_ebx;
942 sc->connectmode = APM_PROT32CONNECT;
943 #else
944 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
945 vmf.vmf_ah = APM_BIOS;
946 vmf.vmf_al = APM_PROT32CONNECT;
947 vmf.vmf_bx = 0;
948 if (vm86_intcall(APM_INT, &vmf)) {
949 printf("apm: 32-bit connection error.\n");
950 return (ENXIO);
951 }
952 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
953 sc->bios.seg.code32.limit = 0xffff;
954 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
955 sc->bios.seg.code16.limit = 0xffff;
956 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
957 sc->bios.seg.data.limit = 0xffff;
958 sc->bios.entry = vmf.vmf_ebx;
959 sc->connectmode = APM_PROT32CONNECT;
960 } else {
961 /* use 16-bit connection */
962 vmf.vmf_ah = APM_BIOS;
963 vmf.vmf_al = APM_PROT16CONNECT;
964 vmf.vmf_bx = 0;
965 if (vm86_intcall(APM_INT, &vmf)) {
966 printf("apm: 16-bit connection error.\n");
967 return (ENXIO);
968 }
969 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
970 sc->bios.seg.code16.limit = 0xffff;
971 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
972 sc->bios.seg.data.limit = 0xffff;
973 sc->bios.entry = vmf.vmf_bx;
974 sc->connectmode = APM_PROT16CONNECT;
975 }
976 #endif
977 return(0);
978 }
979
980
981 /*
982 * return 0 if the user will notice and handle the event,
983 * return 1 if the kernel driver should do so.
984 */
985 static int
986 apm_record_event(struct apm_softc *sc, u_int event_type)
987 {
988 struct apm_event_info *evp;
989
990 if ((sc->sc_flags & SCFLAG_OPEN) == 0)
991 return 1; /* no user waiting */
992 if (sc->event_count == APM_NEVENTS)
993 return 1; /* overflow */
994 if (sc->event_filter[event_type] == 0)
995 return 1; /* not registered */
996 evp = &sc->event_list[sc->event_ptr];
997 sc->event_count++;
998 sc->event_ptr++;
999 sc->event_ptr %= APM_NEVENTS;
1000 evp->type = event_type;
1001 evp->index = ++apm_evindex;
1002 selwakeup(&sc->sc_rsel);
1003 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
1004 }
1005
1006 /* Power profile */
1007 static void
1008 apm_power_profile(struct apm_softc *sc)
1009 {
1010 int state;
1011 struct apm_info info;
1012 static int apm_acline = 0;
1013
1014 if (apm_get_info(&info))
1015 return;
1016
1017 if (apm_acline != info.ai_acline) {
1018 apm_acline = info.ai_acline;
1019 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY;
1020 power_profile_set_state(state);
1021 }
1022 }
1023
1024 /* Process APM event */
1025 static void
1026 apm_processevent(void)
1027 {
1028 int apm_event;
1029 struct apm_softc *sc = &apm_softc;
1030
1031 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
1032 APM_DPRINT("Received APM Event: " #symbol "\n");
1033
1034 do {
1035 apm_event = apm_getevent();
1036 switch (apm_event) {
1037 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
1038 if (apm_op_inprog == 0) {
1039 apm_op_inprog++;
1040 if (apm_record_event(sc, apm_event)) {
1041 apm_suspend(PMST_STANDBY);
1042 }
1043 }
1044 break;
1045 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ);
1046 if (apm_op_inprog == 0) {
1047 apm_op_inprog++;
1048 if (apm_record_event(sc, apm_event)) {
1049 apm_suspend(PMST_STANDBY);
1050 }
1051 }
1052 break;
1053 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
1054 apm_lastreq_notify();
1055 if (apm_op_inprog == 0) {
1056 apm_op_inprog++;
1057 if (apm_record_event(sc, apm_event)) {
1058 apm_do_suspend();
1059 }
1060 }
1061 return; /* XXX skip the rest */
1062 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
1063 apm_lastreq_notify();
1064 if (apm_op_inprog == 0) {
1065 apm_op_inprog++;
1066 if (apm_record_event(sc, apm_event)) {
1067 apm_do_suspend();
1068 }
1069 }
1070 return; /* XXX skip the rest */
1071 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
1072 apm_do_suspend();
1073 break;
1074 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
1075 apm_record_event(sc, apm_event);
1076 apm_resume();
1077 break;
1078 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
1079 apm_record_event(sc, apm_event);
1080 apm_resume();
1081 break;
1082 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
1083 apm_record_event(sc, apm_event);
1084 break;
1085 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
1086 if (apm_record_event(sc, apm_event)) {
1087 apm_battery_low();
1088 apm_suspend(PMST_SUSPEND);
1089 }
1090 break;
1091 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
1092 apm_record_event(sc, apm_event);
1093 apm_power_profile(sc);
1094 break;
1095 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
1096 apm_record_event(sc, apm_event);
1097 inittodr(0); /* adjust time to RTC */
1098 break;
1099 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
1100 apm_record_event(sc, apm_event);
1101 apm_power_profile(sc);
1102 break;
1103 case PMEV_NOEVENT:
1104 break;
1105 default:
1106 printf("Unknown Original APM Event 0x%x\n", apm_event);
1107 break;
1108 }
1109 } while (apm_event != PMEV_NOEVENT);
1110 #ifdef PC98
1111 apm_disable_smm(sc);
1112 #endif
1113 }
1114
1115 /*
1116 * Attach APM:
1117 *
1118 * Initialize APM driver
1119 */
1120
1121 static int
1122 apm_attach(device_t dev)
1123 {
1124 struct apm_softc *sc = &apm_softc;
1125 int flags;
1126 int drv_version;
1127 #ifdef PC98
1128 int rid;
1129 #endif
1130
1131 if (resource_int_value("apm", 0, "flags", &flags) != 0)
1132 flags = 0;
1133
1134 if (flags & 0x20)
1135 statclock_disable = 1;
1136
1137 sc->initialized = 0;
1138
1139 /* Must be externally enabled */
1140 sc->active = 0;
1141
1142 /* Always call HLT in idle loop */
1143 sc->always_halt_cpu = 1;
1144
1145 getenv_int("debug.apm_debug", &apm_debug);
1146
1147 /* print bootstrap messages */
1148 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version);
1149 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n",
1150 sc->bios.seg.code16.base, sc->bios.seg.data.base);
1151 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
1152 sc->bios.entry, is_enabled(sc->slow_idle_cpu),
1153 is_enabled(!sc->disabled));
1154 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n",
1155 sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
1156
1157 #ifdef PC98
1158 rid = 0;
1159 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
1160 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
1161 if (sc->sc_res == NULL)
1162 panic("%s: counldn't map I/O ports", device_get_name(dev));
1163 sc->sc_iot = rman_get_bustag(sc->sc_res);
1164 sc->sc_ioh = rman_get_bushandle(sc->sc_res);
1165
1166 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110)
1167 apm_necsmm_addr = APM_NECSMM_PORT;
1168 else
1169 apm_necsmm_addr = 0;
1170 apm_necsmm_mask = ~APM_NECSMM_EN;
1171 #endif /* PC98 */
1172
1173 /*
1174 * In one test, apm bios version was 1.02; an attempt to register
1175 * a 1.04 driver resulted in a 1.00 connection! Registering a
1176 * 1.02 driver resulted in a 1.02 connection.
1177 */
1178 drv_version = apm_version > 0x102 ? 0x102 : apm_version;
1179 for (; drv_version > 0x100; drv_version--)
1180 if (apm_driver_version(drv_version) == 0)
1181 break;
1182 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 +
1183 ((drv_version & 0x000f) >> 0);
1184 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
1185 ((apm_version & 0x0f00) >> 8);
1186
1187 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
1188
1189 if (sc->intversion >= INTVERSION(1, 1))
1190 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
1191 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n",
1192 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
1193 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
1194 sc->majorversion, sc->minorversion);
1195
1196
1197 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
1198 /* enable power management */
1199 if (sc->disabled) {
1200 if (apm_enable_disable_pm(1)) {
1201 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n",
1202 (sc->bios.r.eax >> 8) & 0xff);
1203 }
1204 }
1205
1206 /* engage power managment (APM 1.1 or later) */
1207 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
1208 if (apm_engage_disengage_pm(1)) {
1209 APM_DPRINT("apm: *Warning* engage function failed err=[%x]",
1210 (sc->bios.r.eax >> 8) & 0xff);
1211 APM_DPRINT(" (Docked or using external power?).\n");
1212 }
1213 }
1214
1215 /* Power the system off using APM */
1216 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL,
1217 SHUTDOWN_PRI_LAST);
1218
1219 /* Register APM again to pass the correct argument of pm_func. */
1220 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc);
1221
1222 sc->initialized = 1;
1223 sc->suspending = 0;
1224
1225 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm");
1226 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl");
1227 return 0;
1228 }
1229
1230 static int
1231 apmopen(dev_t dev, int flag, int fmt, struct thread *td)
1232 {
1233 struct apm_softc *sc = &apm_softc;
1234 int ctl = APMDEV(dev);
1235
1236 if (!sc->initialized)
1237 return (ENXIO);
1238
1239 switch (ctl) {
1240 case APMDEV_CTL:
1241 if (!(flag & FWRITE))
1242 return EINVAL;
1243 if (sc->sc_flags & SCFLAG_OCTL)
1244 return EBUSY;
1245 sc->sc_flags |= SCFLAG_OCTL;
1246 bzero(sc->event_filter, sizeof sc->event_filter);
1247 break;
1248 case APMDEV_NORMAL:
1249 sc->sc_flags |= SCFLAG_ONORMAL;
1250 break;
1251 default:
1252 return ENXIO;
1253 break;
1254 }
1255 return 0;
1256 }
1257
1258 static int
1259 apmclose(dev_t dev, int flag, int fmt, struct thread *td)
1260 {
1261 struct apm_softc *sc = &apm_softc;
1262 int ctl = APMDEV(dev);
1263
1264 switch (ctl) {
1265 case APMDEV_CTL:
1266 apm_lastreq_rejected();
1267 sc->sc_flags &= ~SCFLAG_OCTL;
1268 bzero(sc->event_filter, sizeof sc->event_filter);
1269 break;
1270 case APMDEV_NORMAL:
1271 sc->sc_flags &= ~SCFLAG_ONORMAL;
1272 break;
1273 }
1274 if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
1275 sc->event_count = 0;
1276 sc->event_ptr = 0;
1277 }
1278 return 0;
1279 }
1280
1281 static int
1282 apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1283 {
1284 struct apm_softc *sc = &apm_softc;
1285 struct apm_bios_arg *args;
1286 int error = 0;
1287 int ret;
1288 int newstate;
1289
1290 if (!sc->initialized)
1291 return (ENXIO);
1292 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd);
1293 switch (cmd) {
1294 case APMIO_SUSPEND:
1295 if (!(flag & FWRITE))
1296 return (EPERM);
1297 if (sc->active)
1298 apm_suspend(PMST_SUSPEND);
1299 else
1300 error = EINVAL;
1301 break;
1302
1303 case APMIO_STANDBY:
1304 if (!(flag & FWRITE))
1305 return (EPERM);
1306 if (sc->active)
1307 apm_suspend(PMST_STANDBY);
1308 else
1309 error = EINVAL;
1310 break;
1311
1312 case APMIO_GETINFO_OLD:
1313 {
1314 struct apm_info info;
1315 apm_info_old_t aiop;
1316
1317 if (apm_get_info(&info))
1318 error = ENXIO;
1319 aiop = (apm_info_old_t)addr;
1320 aiop->ai_major = info.ai_major;
1321 aiop->ai_minor = info.ai_minor;
1322 aiop->ai_acline = info.ai_acline;
1323 aiop->ai_batt_stat = info.ai_batt_stat;
1324 aiop->ai_batt_life = info.ai_batt_life;
1325 aiop->ai_status = info.ai_status;
1326 }
1327 break;
1328 case APMIO_GETINFO:
1329 if (apm_get_info((apm_info_t)addr))
1330 error = ENXIO;
1331 break;
1332 case APMIO_GETPWSTATUS:
1333 if (apm_get_pwstatus((apm_pwstatus_t)addr))
1334 error = ENXIO;
1335 break;
1336 case APMIO_ENABLE:
1337 if (!(flag & FWRITE))
1338 return (EPERM);
1339 apm_event_enable();
1340 break;
1341 case APMIO_DISABLE:
1342 if (!(flag & FWRITE))
1343 return (EPERM);
1344 apm_event_disable();
1345 break;
1346 case APMIO_HALTCPU:
1347 if (!(flag & FWRITE))
1348 return (EPERM);
1349 apm_halt_cpu();
1350 break;
1351 case APMIO_NOTHALTCPU:
1352 if (!(flag & FWRITE))
1353 return (EPERM);
1354 apm_not_halt_cpu();
1355 break;
1356 case APMIO_DISPLAY:
1357 if (!(flag & FWRITE))
1358 return (EPERM);
1359 newstate = *(int *)addr;
1360 if (apm_display(newstate))
1361 error = ENXIO;
1362 break;
1363 case APMIO_BIOS:
1364 if (!(flag & FWRITE))
1365 return (EPERM);
1366 /* XXX compatibility with the old interface */
1367 args = (struct apm_bios_arg *)addr;
1368 sc->bios.r.eax = args->eax;
1369 sc->bios.r.ebx = args->ebx;
1370 sc->bios.r.ecx = args->ecx;
1371 sc->bios.r.edx = args->edx;
1372 sc->bios.r.esi = args->esi;
1373 sc->bios.r.edi = args->edi;
1374 if ((ret = apm_bioscall())) {
1375 /*
1376 * Return code 1 means bios call was unsuccessful.
1377 * Error code is stored in %ah.
1378 * Return code -1 means bios call was unsupported
1379 * in the APM BIOS version.
1380 */
1381 if (ret == -1) {
1382 error = EINVAL;
1383 }
1384 } else {
1385 /*
1386 * Return code 0 means bios call was successful.
1387 * We need only %al and can discard %ah.
1388 */
1389 sc->bios.r.eax &= 0xff;
1390 }
1391 args->eax = sc->bios.r.eax;
1392 args->ebx = sc->bios.r.ebx;
1393 args->ecx = sc->bios.r.ecx;
1394 args->edx = sc->bios.r.edx;
1395 args->esi = sc->bios.r.esi;
1396 args->edi = sc->bios.r.edi;
1397 break;
1398 default:
1399 error = EINVAL;
1400 break;
1401 }
1402
1403 /* for /dev/apmctl */
1404 if (APMDEV(dev) == APMDEV_CTL) {
1405 struct apm_event_info *evp;
1406 int i;
1407
1408 error = 0;
1409 switch (cmd) {
1410 case APMIO_NEXTEVENT:
1411 if (!sc->event_count) {
1412 error = EAGAIN;
1413 } else {
1414 evp = (struct apm_event_info *)addr;
1415 i = sc->event_ptr + APM_NEVENTS - sc->event_count;
1416 i %= APM_NEVENTS;
1417 *evp = sc->event_list[i];
1418 sc->event_count--;
1419 }
1420 break;
1421 case APMIO_REJECTLASTREQ:
1422 if (apm_lastreq_rejected()) {
1423 error = EINVAL;
1424 }
1425 break;
1426 default:
1427 error = EINVAL;
1428 break;
1429 }
1430 }
1431
1432 return error;
1433 }
1434
1435 static int
1436 apmwrite(dev_t dev, struct uio *uio, int ioflag)
1437 {
1438 struct apm_softc *sc = &apm_softc;
1439 u_int event_type;
1440 int error;
1441 u_char enabled;
1442
1443 if (APMDEV(dev) != APMDEV_CTL)
1444 return(ENODEV);
1445 if (uio->uio_resid != sizeof(u_int))
1446 return(E2BIG);
1447
1448 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
1449 return(error);
1450
1451 if (event_type < 0 || event_type >= APM_NPMEV)
1452 return(EINVAL);
1453
1454 if (sc->event_filter[event_type] == 0) {
1455 enabled = 1;
1456 } else {
1457 enabled = 0;
1458 }
1459 sc->event_filter[event_type] = enabled;
1460 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
1461
1462 return uio->uio_resid;
1463 }
1464
1465 static int
1466 apmpoll(dev_t dev, int events, struct thread *td)
1467 {
1468 struct apm_softc *sc = &apm_softc;
1469 int revents = 0;
1470
1471 if (events & (POLLIN | POLLRDNORM)) {
1472 if (sc->event_count) {
1473 revents |= events & (POLLIN | POLLRDNORM);
1474 } else {
1475 selrecord(td, &sc->sc_rsel);
1476 }
1477 }
1478
1479 return (revents);
1480 }
1481
1482 static device_method_t apm_methods[] = {
1483 /* Device interface */
1484 DEVMETHOD(device_identify, apm_identify),
1485 DEVMETHOD(device_probe, apm_probe),
1486 DEVMETHOD(device_attach, apm_attach),
1487
1488 { 0, 0 }
1489 };
1490
1491 static driver_t apm_driver = {
1492 "apm",
1493 apm_methods,
1494 1, /* no softc (XXX) */
1495 };
1496
1497 static devclass_t apm_devclass;
1498
1499 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0);
1500 MODULE_VERSION(apm, 1);
1501
1502 static int
1503 apm_pm_func(u_long cmd, void *arg, ...)
1504 {
1505 int state, apm_state;
1506 int error;
1507 va_list ap;
1508
1509 error = 0;
1510 switch (cmd) {
1511 case POWER_CMD_SUSPEND:
1512 va_start(ap, arg);
1513 state = va_arg(ap, int);
1514 va_end(ap);
1515
1516 switch (state) {
1517 case POWER_SLEEP_STATE_STANDBY:
1518 apm_state = PMST_STANDBY;
1519 break;
1520 case POWER_SLEEP_STATE_SUSPEND:
1521 case POWER_SLEEP_STATE_HIBERNATE:
1522 apm_state = PMST_SUSPEND;
1523 break;
1524 default:
1525 error = EINVAL;
1526 goto out;
1527 }
1528
1529 apm_suspend(apm_state);
1530 break;
1531
1532 default:
1533 error = EINVAL;
1534 goto out;
1535 }
1536
1537 out:
1538 return (error);
1539 }
1540
1541 static void
1542 apm_pm_register(void *arg)
1543 {
1544 int disabled = 0;
1545
1546 resource_int_value("apm", 0, "disabled", &disabled);
1547 if (disabled == 0)
1548 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL);
1549 }
1550
1551 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);
Cache object: 94bbc9a80864b0507cad74a65db7f39b
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