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/5.3/sys/i386/bios/apm.c 130605 2004-06-16 20:27:50Z imp $");
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 int flags;
868 #ifdef PC98
869 int rid;
870 #endif
871
872 device_set_desc(dev, "APM BIOS");
873 if (device_get_unit(dev) > 0) {
874 printf("apm: Only one APM driver supported.\n");
875 return ENXIO;
876 }
877
878 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
879 power_pm_get_type() != POWER_PM_TYPE_APM) {
880 printf("apm: Other PM system enabled.\n");
881 return ENXIO;
882 }
883
884 if (resource_int_value("apm", 0, "flags", &flags) != 0)
885 flags = 0;
886
887 bzero(&vmf, sizeof(struct vm86frame)); /* safety */
888 bzero(&apm_softc, sizeof(apm_softc));
889 vmf.vmf_ah = APM_BIOS;
890 vmf.vmf_al = APM_INSTCHECK;
891 vmf.vmf_bx = 0;
892 if (vm86_intcall(APM_INT, &vmf))
893 return ENXIO; /* APM not found */
894 if (vmf.vmf_bx != 0x504d) {
895 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
896 return ENXIO;
897 }
898 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
899 printf("apm: protected mode connections are not supported\n");
900 return ENXIO;
901 }
902
903 apm_version = vmf.vmf_ax;
904 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
905 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
906 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
907
908 vmf.vmf_ah = APM_BIOS;
909 vmf.vmf_al = APM_DISCONNECT;
910 vmf.vmf_bx = 0;
911 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */
912
913 #ifdef PC98
914 /* PC98 have bogos APM 32bit BIOS */
915 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0)
916 return ENXIO;
917 rid = 0;
918 bus_set_resource(dev, SYS_RES_IOPORT, rid,
919 APM_NECSMM_PORT, APM_NECSMM_PORTSZ);
920 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
921 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
922 if (sc->sc_res == NULL) {
923 printf("apm: cannot open NEC smm device\n");
924 return ENXIO;
925 }
926 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res);
927
928 vmf.vmf_ah = APM_BIOS;
929 vmf.vmf_al = APM_PROT32CONNECT;
930 vmf.vmf_bx = 0;
931 if (vm86_intcall(APM_INT, &vmf)) {
932 printf("apm: 32-bit connection error.\n");
933 return (ENXIO);
934 }
935
936 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
937 sc->bios.seg.code32.limit = 0xffff;
938 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
939 sc->bios.seg.code16.limit = 0xffff;
940 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
941 sc->bios.seg.data.limit = 0xffff;
942 sc->bios.entry = vmf.vmf_ebx;
943 sc->connectmode = APM_PROT32CONNECT;
944 #else
945 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
946 vmf.vmf_ah = APM_BIOS;
947 vmf.vmf_al = APM_PROT32CONNECT;
948 vmf.vmf_bx = 0;
949 if (vm86_intcall(APM_INT, &vmf)) {
950 printf("apm: 32-bit connection error.\n");
951 return (ENXIO);
952 }
953 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
954 sc->bios.seg.code32.limit = 0xffff;
955 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
956 sc->bios.seg.code16.limit = 0xffff;
957 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
958 sc->bios.seg.data.limit = 0xffff;
959 sc->bios.entry = vmf.vmf_ebx;
960 sc->connectmode = APM_PROT32CONNECT;
961 } else {
962 /* use 16-bit connection */
963 vmf.vmf_ah = APM_BIOS;
964 vmf.vmf_al = APM_PROT16CONNECT;
965 vmf.vmf_bx = 0;
966 if (vm86_intcall(APM_INT, &vmf)) {
967 printf("apm: 16-bit connection error.\n");
968 return (ENXIO);
969 }
970 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
971 sc->bios.seg.code16.limit = 0xffff;
972 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
973 sc->bios.seg.data.limit = 0xffff;
974 sc->bios.entry = vmf.vmf_bx;
975 sc->connectmode = APM_PROT16CONNECT;
976 }
977 #endif
978 return(0);
979 }
980
981
982 /*
983 * return 0 if the user will notice and handle the event,
984 * return 1 if the kernel driver should do so.
985 */
986 static int
987 apm_record_event(struct apm_softc *sc, u_int event_type)
988 {
989 struct apm_event_info *evp;
990
991 if ((sc->sc_flags & SCFLAG_OPEN) == 0)
992 return 1; /* no user waiting */
993 if (sc->event_count == APM_NEVENTS)
994 return 1; /* overflow */
995 if (sc->event_filter[event_type] == 0)
996 return 1; /* not registered */
997 evp = &sc->event_list[sc->event_ptr];
998 sc->event_count++;
999 sc->event_ptr++;
1000 sc->event_ptr %= APM_NEVENTS;
1001 evp->type = event_type;
1002 evp->index = ++apm_evindex;
1003 selwakeuppri(&sc->sc_rsel, PZERO);
1004 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
1005 }
1006
1007 /* Power profile */
1008 static void
1009 apm_power_profile(struct apm_softc *sc)
1010 {
1011 int state;
1012 struct apm_info info;
1013 static int apm_acline = 0;
1014
1015 if (apm_get_info(&info))
1016 return;
1017
1018 if (apm_acline != info.ai_acline) {
1019 apm_acline = info.ai_acline;
1020 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY;
1021 power_profile_set_state(state);
1022 }
1023 }
1024
1025 /* Process APM event */
1026 static void
1027 apm_processevent(void)
1028 {
1029 int apm_event;
1030 struct apm_softc *sc = &apm_softc;
1031
1032 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
1033 APM_DPRINT("Received APM Event: " #symbol "\n");
1034
1035 do {
1036 apm_event = apm_getevent();
1037 switch (apm_event) {
1038 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
1039 if (apm_op_inprog == 0) {
1040 apm_op_inprog++;
1041 if (apm_record_event(sc, apm_event)) {
1042 apm_suspend(PMST_STANDBY);
1043 }
1044 }
1045 break;
1046 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ);
1047 if (apm_op_inprog == 0) {
1048 apm_op_inprog++;
1049 if (apm_record_event(sc, apm_event)) {
1050 apm_suspend(PMST_STANDBY);
1051 }
1052 }
1053 break;
1054 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
1055 apm_lastreq_notify();
1056 if (apm_op_inprog == 0) {
1057 apm_op_inprog++;
1058 if (apm_record_event(sc, apm_event)) {
1059 apm_do_suspend();
1060 }
1061 }
1062 return; /* XXX skip the rest */
1063 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
1064 apm_lastreq_notify();
1065 if (apm_op_inprog == 0) {
1066 apm_op_inprog++;
1067 if (apm_record_event(sc, apm_event)) {
1068 apm_do_suspend();
1069 }
1070 }
1071 return; /* XXX skip the rest */
1072 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
1073 apm_do_suspend();
1074 break;
1075 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
1076 apm_record_event(sc, apm_event);
1077 apm_resume();
1078 break;
1079 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
1080 apm_record_event(sc, apm_event);
1081 apm_resume();
1082 break;
1083 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
1084 apm_record_event(sc, apm_event);
1085 break;
1086 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
1087 if (apm_record_event(sc, apm_event)) {
1088 apm_battery_low();
1089 apm_suspend(PMST_SUSPEND);
1090 }
1091 break;
1092 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
1093 apm_record_event(sc, apm_event);
1094 apm_power_profile(sc);
1095 break;
1096 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
1097 apm_record_event(sc, apm_event);
1098 inittodr(0); /* adjust time to RTC */
1099 break;
1100 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
1101 apm_record_event(sc, apm_event);
1102 apm_power_profile(sc);
1103 break;
1104 case PMEV_NOEVENT:
1105 break;
1106 default:
1107 printf("Unknown Original APM Event 0x%x\n", apm_event);
1108 break;
1109 }
1110 } while (apm_event != PMEV_NOEVENT);
1111 #ifdef PC98
1112 apm_disable_smm(sc);
1113 #endif
1114 }
1115
1116 /*
1117 * Attach APM:
1118 *
1119 * Initialize APM driver
1120 */
1121
1122 static int
1123 apm_attach(device_t dev)
1124 {
1125 struct apm_softc *sc = &apm_softc;
1126 int flags;
1127 int drv_version;
1128 #ifdef PC98
1129 int rid;
1130 #endif
1131
1132 if (resource_int_value("apm", 0, "flags", &flags) != 0)
1133 flags = 0;
1134
1135 if (flags & 0x20)
1136 statclock_disable = 1;
1137
1138 sc->initialized = 0;
1139
1140 /* Must be externally enabled */
1141 sc->active = 0;
1142
1143 /* Always call HLT in idle loop */
1144 sc->always_halt_cpu = 1;
1145
1146 getenv_int("debug.apm_debug", &apm_debug);
1147
1148 /* print bootstrap messages */
1149 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version);
1150 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n",
1151 sc->bios.seg.code16.base, sc->bios.seg.data.base);
1152 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
1153 sc->bios.entry, is_enabled(sc->slow_idle_cpu),
1154 is_enabled(!sc->disabled));
1155 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n",
1156 sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
1157
1158 #ifdef PC98
1159 rid = 0;
1160 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
1161 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
1162 if (sc->sc_res == NULL)
1163 panic("%s: counldn't map I/O ports", device_get_name(dev));
1164 sc->sc_iot = rman_get_bustag(sc->sc_res);
1165 sc->sc_ioh = rman_get_bushandle(sc->sc_res);
1166
1167 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110)
1168 apm_necsmm_addr = APM_NECSMM_PORT;
1169 else
1170 apm_necsmm_addr = 0;
1171 apm_necsmm_mask = ~APM_NECSMM_EN;
1172 #endif /* PC98 */
1173
1174 /*
1175 * In one test, apm bios version was 1.02; an attempt to register
1176 * a 1.04 driver resulted in a 1.00 connection! Registering a
1177 * 1.02 driver resulted in a 1.02 connection.
1178 */
1179 drv_version = apm_version > 0x102 ? 0x102 : apm_version;
1180 for (; drv_version > 0x100; drv_version--)
1181 if (apm_driver_version(drv_version) == 0)
1182 break;
1183 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 +
1184 ((drv_version & 0x000f) >> 0);
1185 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
1186 ((apm_version & 0x0f00) >> 8);
1187
1188 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
1189
1190 if (sc->intversion >= INTVERSION(1, 1))
1191 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
1192 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n",
1193 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
1194 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
1195 sc->majorversion, sc->minorversion);
1196
1197
1198 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
1199 /* enable power management */
1200 if (sc->disabled) {
1201 if (apm_enable_disable_pm(1)) {
1202 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n",
1203 (sc->bios.r.eax >> 8) & 0xff);
1204 }
1205 }
1206
1207 /* engage power managment (APM 1.1 or later) */
1208 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
1209 if (apm_engage_disengage_pm(1)) {
1210 APM_DPRINT("apm: *Warning* engage function failed err=[%x]",
1211 (sc->bios.r.eax >> 8) & 0xff);
1212 APM_DPRINT(" (Docked or using external power?).\n");
1213 }
1214 }
1215
1216 /* Power the system off using APM */
1217 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL,
1218 SHUTDOWN_PRI_LAST);
1219
1220 /* Register APM again to pass the correct argument of pm_func. */
1221 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc);
1222
1223 sc->initialized = 1;
1224 sc->suspending = 0;
1225
1226 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm");
1227 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl");
1228 return 0;
1229 }
1230
1231 static int
1232 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td)
1233 {
1234 struct apm_softc *sc = &apm_softc;
1235 int ctl = APMDEV(dev);
1236
1237 if (!sc->initialized)
1238 return (ENXIO);
1239
1240 switch (ctl) {
1241 case APMDEV_CTL:
1242 if (!(flag & FWRITE))
1243 return EINVAL;
1244 if (sc->sc_flags & SCFLAG_OCTL)
1245 return EBUSY;
1246 sc->sc_flags |= SCFLAG_OCTL;
1247 bzero(sc->event_filter, sizeof sc->event_filter);
1248 break;
1249 case APMDEV_NORMAL:
1250 sc->sc_flags |= SCFLAG_ONORMAL;
1251 break;
1252 default:
1253 return ENXIO;
1254 break;
1255 }
1256 return 0;
1257 }
1258
1259 static int
1260 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td)
1261 {
1262 struct apm_softc *sc = &apm_softc;
1263 int ctl = APMDEV(dev);
1264
1265 switch (ctl) {
1266 case APMDEV_CTL:
1267 apm_lastreq_rejected();
1268 sc->sc_flags &= ~SCFLAG_OCTL;
1269 bzero(sc->event_filter, sizeof sc->event_filter);
1270 break;
1271 case APMDEV_NORMAL:
1272 sc->sc_flags &= ~SCFLAG_ONORMAL;
1273 break;
1274 }
1275 if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
1276 sc->event_count = 0;
1277 sc->event_ptr = 0;
1278 }
1279 return 0;
1280 }
1281
1282 static int
1283 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1284 {
1285 struct apm_softc *sc = &apm_softc;
1286 struct apm_bios_arg *args;
1287 int error = 0;
1288 int ret;
1289 int newstate;
1290
1291 if (!sc->initialized)
1292 return (ENXIO);
1293 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd);
1294 switch (cmd) {
1295 case APMIO_SUSPEND:
1296 if (!(flag & FWRITE))
1297 return (EPERM);
1298 if (sc->active)
1299 apm_suspend(PMST_SUSPEND);
1300 else
1301 error = EINVAL;
1302 break;
1303
1304 case APMIO_STANDBY:
1305 if (!(flag & FWRITE))
1306 return (EPERM);
1307 if (sc->active)
1308 apm_suspend(PMST_STANDBY);
1309 else
1310 error = EINVAL;
1311 break;
1312
1313 case APMIO_GETINFO_OLD:
1314 {
1315 struct apm_info info;
1316 apm_info_old_t aiop;
1317
1318 if (apm_get_info(&info))
1319 error = ENXIO;
1320 aiop = (apm_info_old_t)addr;
1321 aiop->ai_major = info.ai_major;
1322 aiop->ai_minor = info.ai_minor;
1323 aiop->ai_acline = info.ai_acline;
1324 aiop->ai_batt_stat = info.ai_batt_stat;
1325 aiop->ai_batt_life = info.ai_batt_life;
1326 aiop->ai_status = info.ai_status;
1327 }
1328 break;
1329 case APMIO_GETINFO:
1330 if (apm_get_info((apm_info_t)addr))
1331 error = ENXIO;
1332 break;
1333 case APMIO_GETPWSTATUS:
1334 if (apm_get_pwstatus((apm_pwstatus_t)addr))
1335 error = ENXIO;
1336 break;
1337 case APMIO_ENABLE:
1338 if (!(flag & FWRITE))
1339 return (EPERM);
1340 apm_event_enable();
1341 break;
1342 case APMIO_DISABLE:
1343 if (!(flag & FWRITE))
1344 return (EPERM);
1345 apm_event_disable();
1346 break;
1347 case APMIO_HALTCPU:
1348 if (!(flag & FWRITE))
1349 return (EPERM);
1350 apm_halt_cpu();
1351 break;
1352 case APMIO_NOTHALTCPU:
1353 if (!(flag & FWRITE))
1354 return (EPERM);
1355 apm_not_halt_cpu();
1356 break;
1357 case APMIO_DISPLAY:
1358 if (!(flag & FWRITE))
1359 return (EPERM);
1360 newstate = *(int *)addr;
1361 if (apm_display(newstate))
1362 error = ENXIO;
1363 break;
1364 case APMIO_BIOS:
1365 if (!(flag & FWRITE))
1366 return (EPERM);
1367 /* XXX compatibility with the old interface */
1368 args = (struct apm_bios_arg *)addr;
1369 sc->bios.r.eax = args->eax;
1370 sc->bios.r.ebx = args->ebx;
1371 sc->bios.r.ecx = args->ecx;
1372 sc->bios.r.edx = args->edx;
1373 sc->bios.r.esi = args->esi;
1374 sc->bios.r.edi = args->edi;
1375 if ((ret = apm_bioscall())) {
1376 /*
1377 * Return code 1 means bios call was unsuccessful.
1378 * Error code is stored in %ah.
1379 * Return code -1 means bios call was unsupported
1380 * in the APM BIOS version.
1381 */
1382 if (ret == -1) {
1383 error = EINVAL;
1384 }
1385 } else {
1386 /*
1387 * Return code 0 means bios call was successful.
1388 * We need only %al and can discard %ah.
1389 */
1390 sc->bios.r.eax &= 0xff;
1391 }
1392 args->eax = sc->bios.r.eax;
1393 args->ebx = sc->bios.r.ebx;
1394 args->ecx = sc->bios.r.ecx;
1395 args->edx = sc->bios.r.edx;
1396 args->esi = sc->bios.r.esi;
1397 args->edi = sc->bios.r.edi;
1398 break;
1399 default:
1400 error = EINVAL;
1401 break;
1402 }
1403
1404 /* for /dev/apmctl */
1405 if (APMDEV(dev) == APMDEV_CTL) {
1406 struct apm_event_info *evp;
1407 int i;
1408
1409 error = 0;
1410 switch (cmd) {
1411 case APMIO_NEXTEVENT:
1412 if (!sc->event_count) {
1413 error = EAGAIN;
1414 } else {
1415 evp = (struct apm_event_info *)addr;
1416 i = sc->event_ptr + APM_NEVENTS - sc->event_count;
1417 i %= APM_NEVENTS;
1418 *evp = sc->event_list[i];
1419 sc->event_count--;
1420 }
1421 break;
1422 case APMIO_REJECTLASTREQ:
1423 if (apm_lastreq_rejected()) {
1424 error = EINVAL;
1425 }
1426 break;
1427 default:
1428 error = EINVAL;
1429 break;
1430 }
1431 }
1432
1433 return error;
1434 }
1435
1436 static int
1437 apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
1438 {
1439 struct apm_softc *sc = &apm_softc;
1440 u_int event_type;
1441 int error;
1442 u_char enabled;
1443
1444 if (APMDEV(dev) != APMDEV_CTL)
1445 return(ENODEV);
1446 if (uio->uio_resid != sizeof(u_int))
1447 return(E2BIG);
1448
1449 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
1450 return(error);
1451
1452 if (event_type < 0 || event_type >= APM_NPMEV)
1453 return(EINVAL);
1454
1455 if (sc->event_filter[event_type] == 0) {
1456 enabled = 1;
1457 } else {
1458 enabled = 0;
1459 }
1460 sc->event_filter[event_type] = enabled;
1461 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
1462
1463 return uio->uio_resid;
1464 }
1465
1466 static int
1467 apmpoll(struct cdev *dev, int events, struct thread *td)
1468 {
1469 struct apm_softc *sc = &apm_softc;
1470 int revents = 0;
1471
1472 if (events & (POLLIN | POLLRDNORM)) {
1473 if (sc->event_count) {
1474 revents |= events & (POLLIN | POLLRDNORM);
1475 } else {
1476 selrecord(td, &sc->sc_rsel);
1477 }
1478 }
1479
1480 return (revents);
1481 }
1482
1483 static device_method_t apm_methods[] = {
1484 /* Device interface */
1485 DEVMETHOD(device_identify, apm_identify),
1486 DEVMETHOD(device_probe, apm_probe),
1487 DEVMETHOD(device_attach, apm_attach),
1488
1489 { 0, 0 }
1490 };
1491
1492 static driver_t apm_driver = {
1493 "apm",
1494 apm_methods,
1495 1, /* no softc (XXX) */
1496 };
1497
1498 static devclass_t apm_devclass;
1499
1500 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0);
1501 MODULE_VERSION(apm, 1);
1502
1503 static int
1504 apm_pm_func(u_long cmd, void *arg, ...)
1505 {
1506 int state, apm_state;
1507 int error;
1508 va_list ap;
1509
1510 error = 0;
1511 switch (cmd) {
1512 case POWER_CMD_SUSPEND:
1513 va_start(ap, arg);
1514 state = va_arg(ap, int);
1515 va_end(ap);
1516
1517 switch (state) {
1518 case POWER_SLEEP_STATE_STANDBY:
1519 apm_state = PMST_STANDBY;
1520 break;
1521 case POWER_SLEEP_STATE_SUSPEND:
1522 case POWER_SLEEP_STATE_HIBERNATE:
1523 apm_state = PMST_SUSPEND;
1524 break;
1525 default:
1526 error = EINVAL;
1527 goto out;
1528 }
1529
1530 apm_suspend(apm_state);
1531 break;
1532
1533 default:
1534 error = EINVAL;
1535 goto out;
1536 }
1537
1538 out:
1539 return (error);
1540 }
1541
1542 static void
1543 apm_pm_register(void *arg)
1544 {
1545
1546 if (!resource_disabled("apm", 0))
1547 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL);
1548 }
1549
1550 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);
Cache object: ea4c7e04f344c3f1de67ab9eb872db0e
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