FreeBSD/Linux Kernel Cross Reference
sys/i386/bios/apm.c
1 /*-
2 * APM (Advanced Power Management) BIOS Device Driver
3 *
4 * Copyright (c) 1994 UKAI, Fumitoshi.
5 * Copyright (c) 1994-1995 by HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
6 * Copyright (c) 1996 Nate Williams <nate@FreeBSD.org>
7 * Copyright (c) 1997 Poul-Henning Kamp <phk@FreeBSD.org>
8 *
9 * This software may be used, modified, copied, and distributed, in
10 * both source and binary form provided that the above copyright and
11 * these terms are retained. Under no circumstances is the author
12 * responsible for the proper functioning of this software, nor does
13 * the author assume any responsibility for damages incurred with its
14 * use.
15 *
16 * Sep, 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD)
17 */
18
19 #include <sys/cdefs.h>
20 __FBSDID("$FreeBSD: releng/6.3/sys/i386/bios/apm.c 174470 2007-12-09 00:24:16Z njl $");
21
22 #include <sys/param.h>
23 #include <sys/systm.h>
24 #include <sys/bus.h>
25 #include <sys/conf.h>
26 #include <sys/eventhandler.h>
27 #include <sys/fcntl.h>
28 #include <sys/kernel.h>
29 #include <sys/module.h>
30 #include <sys/poll.h>
31 #include <sys/power.h>
32 #include <sys/reboot.h>
33 #include <sys/selinfo.h>
34 #include <sys/signalvar.h>
35 #include <sys/sysctl.h>
36 #include <sys/syslog.h>
37 #include <sys/time.h>
38 #include <sys/uio.h>
39
40 #include <machine/apm_bios.h>
41 #include <machine/clock.h>
42 #include <machine/endian.h>
43 #include <machine/pc/bios.h>
44 #include <machine/cpufunc.h>
45 #include <machine/segments.h>
46 #include <machine/stdarg.h>
47 #include <machine/vm86.h>
48
49 #include <machine/bus.h>
50 #include <machine/resource.h>
51 #include <sys/rman.h>
52
53 #include <vm/vm.h>
54 #include <vm/pmap.h>
55 #include <vm/vm_param.h>
56
57 #include <i386/bios/apm.h>
58
59 /* Used by the apm_saver screen saver module */
60 int apm_display(int newstate);
61 struct apm_softc apm_softc;
62
63 static void apm_resume(void);
64 static int apm_bioscall(void);
65 static int apm_check_function_supported(u_int version, u_int func);
66
67 static int apm_pm_func(u_long, void*, ...);
68
69 static u_long apm_version;
70
71 int apm_evindex;
72
73 #define SCFLAG_ONORMAL 0x0000001
74 #define SCFLAG_OCTL 0x0000002
75 #define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL)
76
77 #define APMDEV(dev) (minor(dev)&0x0f)
78 #define APMDEV_NORMAL 0
79 #define APMDEV_CTL 8
80
81 #ifdef PC98
82 extern int bios32_apm98(struct bios_regs *, u_int, u_short);
83
84 /* PC98's SMM definition */
85 #define APM_NECSMM_PORT 0x6b8e
86 #define APM_NECSMM_PORTSZ 1
87 #define APM_NECSMM_EN 0x10
88 static __inline void apm_enable_smm(struct apm_softc *);
89 static __inline void apm_disable_smm(struct apm_softc *);
90 int apm_necsmm_addr;
91 u_int32_t apm_necsmm_mask;
92 #endif
93
94 static struct apmhook *hook[NAPM_HOOK]; /* XXX */
95
96 #define is_enabled(foo) ((foo) ? "enabled" : "disabled")
97
98 /* Map version number to integer (keeps ordering of version numbers) */
99 #define INTVERSION(major, minor) ((major)*100 + (minor))
100
101 static struct callout_handle apm_timeout_ch =
102 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch);
103
104 static timeout_t apm_timeout;
105 static d_open_t apmopen;
106 static d_close_t apmclose;
107 static d_write_t apmwrite;
108 static d_ioctl_t apmioctl;
109 static d_poll_t apmpoll;
110
111 static struct cdevsw apm_cdevsw = {
112 .d_version = D_VERSION,
113 .d_flags = D_NEEDGIANT,
114 .d_open = apmopen,
115 .d_close = apmclose,
116 .d_write = apmwrite,
117 .d_ioctl = apmioctl,
118 .d_poll = apmpoll,
119 .d_name = "apm",
120 };
121
122 static int apm_suspend_delay = 1;
123 static int apm_standby_delay = 1;
124 static int apm_swab_batt_minutes = 0;
125 static int apm_debug = 0;
126
127 #define APM_DPRINT(args...) do { \
128 if (apm_debug) { \
129 printf(args); \
130 } \
131 } while (0)
132
133 SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, "");
134 SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, "");
135 SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, "");
136
137 TUNABLE_INT("machdep.apm_swab_batt_minutes", &apm_swab_batt_minutes);
138 SYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RW,
139 &apm_swab_batt_minutes, 0, "Byte swap battery time value.");
140
141 #ifdef PC98
142 static __inline void
143 apm_enable_smm(sc)
144 struct apm_softc *sc;
145 {
146 bus_space_tag_t iot = sc->sc_iot;
147 bus_space_handle_t ioh = sc->sc_ioh;
148 if (apm_necsmm_addr != 0)
149 bus_space_write_1(iot, ioh, 0,
150 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask));
151 }
152
153 static __inline void
154 apm_disable_smm(sc)
155 struct apm_softc *sc;
156 {
157 bus_space_tag_t iot = sc->sc_iot;
158 bus_space_handle_t ioh = sc->sc_ioh;
159 if (apm_necsmm_addr != 0)
160 bus_space_write_1(iot, ioh, 0,
161 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask));
162 }
163 #endif
164
165 /*
166 * return 0 if the function successfull,
167 * return 1 if the function unsuccessfull,
168 * return -1 if the function unsupported.
169 */
170 static int
171 apm_bioscall(void)
172 {
173 struct apm_softc *sc = &apm_softc;
174 int errno = 0;
175 u_int apm_func = sc->bios.r.eax & 0xff;
176
177 if (!apm_check_function_supported(sc->intversion, apm_func)) {
178 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n",
179 apm_func, sc->majorversion, sc->minorversion);
180 return (-1);
181 }
182
183 sc->bios_busy = 1;
184 #ifdef PC98
185 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG);
186 if (bios32_apm98(&sc->bios.r, sc->bios.entry,
187 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0)
188 return 1;
189 #else
190 if (sc->connectmode == APM_PROT32CONNECT) {
191 set_bios_selectors(&sc->bios.seg,
192 BIOSCODE_FLAG | BIOSDATA_FLAG);
193 errno = bios32(&sc->bios.r,
194 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL));
195 } else {
196 errno = bios16(&sc->bios, NULL);
197 }
198 #endif
199 sc->bios_busy = 0;
200 return (errno);
201 }
202
203 /* check whether APM function is supported (1) or not (0). */
204 static int
205 apm_check_function_supported(u_int version, u_int func)
206 {
207 /* except driver version */
208 if (func == APM_DRVVERSION) {
209 return (1);
210 }
211 #ifdef PC98
212 if (func == APM_GETPWSTATUS) {
213 return (1);
214 }
215 #endif
216
217 switch (version) {
218 case INTVERSION(1, 0):
219 if (func > APM_GETPMEVENT) {
220 return (0); /* not supported */
221 }
222 break;
223 case INTVERSION(1, 1):
224 if (func > APM_ENGAGEDISENGAGEPM &&
225 func < APM_OEMFUNC) {
226 return (0); /* not supported */
227 }
228 break;
229 case INTVERSION(1, 2):
230 break;
231 }
232
233 return (1); /* supported */
234 }
235
236 /* enable/disable power management */
237 static int
238 apm_enable_disable_pm(int enable)
239 {
240 struct apm_softc *sc = &apm_softc;
241
242 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
243
244 if (sc->intversion >= INTVERSION(1, 1))
245 sc->bios.r.ebx = PMDV_ALLDEV;
246 else
247 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */
248 sc->bios.r.ecx = enable;
249 sc->bios.r.edx = 0;
250 return (apm_bioscall());
251 }
252
253 /* register driver version (APM 1.1 or later) */
254 static int
255 apm_driver_version(int version)
256 {
257 struct apm_softc *sc = &apm_softc;
258
259 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION;
260 sc->bios.r.ebx = 0x0;
261 sc->bios.r.ecx = version;
262 sc->bios.r.edx = 0;
263
264 if (apm_bioscall() == 0 && sc->bios.r.eax == version)
265 return (0);
266
267 /* Some old BIOSes don't return the connection version in %ax. */
268 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION))
269 return (0);
270
271 return (1);
272 }
273
274 /* engage/disengage power management (APM 1.1 or later) */
275 static int
276 apm_engage_disengage_pm(int engage)
277 {
278 struct apm_softc *sc = &apm_softc;
279
280 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
281 sc->bios.r.ebx = PMDV_ALLDEV;
282 sc->bios.r.ecx = engage;
283 sc->bios.r.edx = 0;
284 return (apm_bioscall());
285 }
286
287 /* get PM event */
288 static u_int
289 apm_getevent(void)
290 {
291 struct apm_softc *sc = &apm_softc;
292
293 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT;
294
295 sc->bios.r.ebx = 0;
296 sc->bios.r.ecx = 0;
297 sc->bios.r.edx = 0;
298 if (apm_bioscall())
299 return (PMEV_NOEVENT);
300 return (sc->bios.r.ebx & 0xffff);
301 }
302
303 /* suspend entire system */
304 static int
305 apm_suspend_system(int state)
306 {
307 struct apm_softc *sc = &apm_softc;
308
309 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
310 sc->bios.r.ebx = PMDV_ALLDEV;
311 sc->bios.r.ecx = state;
312 sc->bios.r.edx = 0;
313
314 #ifdef PC98
315 apm_disable_smm(sc);
316 #endif
317 if (apm_bioscall()) {
318 printf("Entire system suspend failure: errcode = %d\n",
319 0xff & (sc->bios.r.eax >> 8));
320 return 1;
321 }
322 #ifdef PC98
323 apm_enable_smm(sc);
324 #endif
325 return 0;
326 }
327
328 /* Display control */
329 /*
330 * Experimental implementation: My laptop machine can't handle this function
331 * If your laptop can control the display via APM, please inform me.
332 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
333 */
334 int
335 apm_display(int newstate)
336 {
337 struct apm_softc *sc = &apm_softc;
338
339 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
340 sc->bios.r.ebx = PMDV_DISP0;
341 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
342 sc->bios.r.edx = 0;
343 if (apm_bioscall() == 0) {
344 return 0;
345 }
346
347 /* If failed, then try to blank all display devices instead. */
348 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
349 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */
350 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
351 sc->bios.r.edx = 0;
352 if (apm_bioscall() == 0) {
353 return 0;
354 }
355 printf("Display off failure: errcode = %d\n",
356 0xff & (sc->bios.r.eax >> 8));
357 return 1;
358 }
359
360 /*
361 * Turn off the entire system.
362 */
363 static void
364 apm_power_off(void *junk, int howto)
365 {
366 struct apm_softc *sc = &apm_softc;
367
368 /* Not halting powering off, or not active */
369 if (!(howto & RB_POWEROFF) || !apm_softc.active)
370 return;
371 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
372 sc->bios.r.ebx = PMDV_ALLDEV;
373 sc->bios.r.ecx = PMST_OFF;
374 sc->bios.r.edx = 0;
375 (void) apm_bioscall();
376 }
377
378 /* APM Battery low handler */
379 static void
380 apm_battery_low(void)
381 {
382 printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
383 }
384
385 /* APM hook manager */
386 static struct apmhook *
387 apm_add_hook(struct apmhook **list, struct apmhook *ah)
388 {
389 int s;
390 struct apmhook *p, *prev;
391
392 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name);
393
394 s = splhigh();
395 if (ah == NULL)
396 panic("illegal apm_hook!");
397 prev = NULL;
398 for (p = *list; p != NULL; prev = p, p = p->ah_next)
399 if (p->ah_order > ah->ah_order)
400 break;
401
402 if (prev == NULL) {
403 ah->ah_next = *list;
404 *list = ah;
405 } else {
406 ah->ah_next = prev->ah_next;
407 prev->ah_next = ah;
408 }
409 splx(s);
410 return ah;
411 }
412
413 static void
414 apm_del_hook(struct apmhook **list, struct apmhook *ah)
415 {
416 int s;
417 struct apmhook *p, *prev;
418
419 s = splhigh();
420 prev = NULL;
421 for (p = *list; p != NULL; prev = p, p = p->ah_next)
422 if (p == ah)
423 goto deleteit;
424 panic("Tried to delete unregistered apm_hook.");
425 goto nosuchnode;
426 deleteit:
427 if (prev != NULL)
428 prev->ah_next = p->ah_next;
429 else
430 *list = p->ah_next;
431 nosuchnode:
432 splx(s);
433 }
434
435
436 /* APM driver calls some functions automatically */
437 static void
438 apm_execute_hook(struct apmhook *list)
439 {
440 struct apmhook *p;
441
442 for (p = list; p != NULL; p = p->ah_next) {
443 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name);
444 if ((*(p->ah_fun))(p->ah_arg))
445 printf("Warning: APM hook \"%s\" failed", p->ah_name);
446 }
447 }
448
449
450 /* establish an apm hook */
451 struct apmhook *
452 apm_hook_establish(int apmh, struct apmhook *ah)
453 {
454 if (apmh < 0 || apmh >= NAPM_HOOK)
455 return NULL;
456
457 return apm_add_hook(&hook[apmh], ah);
458 }
459
460 /* disestablish an apm hook */
461 void
462 apm_hook_disestablish(int apmh, struct apmhook *ah)
463 {
464 if (apmh < 0 || apmh >= NAPM_HOOK)
465 return;
466
467 apm_del_hook(&hook[apmh], ah);
468 }
469
470 static int apm_record_event(struct apm_softc *, u_int);
471 static void apm_processevent(void);
472
473 static u_int apm_op_inprog = 0;
474
475 static void
476 apm_do_suspend(void)
477 {
478 struct apm_softc *sc = &apm_softc;
479 int error;
480
481 if (sc == NULL || sc->initialized == 0)
482 return;
483
484 apm_op_inprog = 0;
485 sc->suspends = sc->suspend_countdown = 0;
486
487 /*
488 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since
489 * non-MPSAFE drivers need this.
490 */
491 mtx_lock(&Giant);
492 error = DEVICE_SUSPEND(root_bus);
493 if (error) {
494 mtx_unlock(&Giant);
495 return;
496 }
497
498 apm_execute_hook(hook[APM_HOOK_SUSPEND]);
499 if (apm_suspend_system(PMST_SUSPEND) == 0) {
500 sc->suspending = 1;
501 apm_processevent();
502 } else {
503 /* Failure, 'resume' the system again */
504 apm_execute_hook(hook[APM_HOOK_RESUME]);
505 DEVICE_RESUME(root_bus);
506 }
507 mtx_unlock(&Giant);
508 return;
509 }
510
511 static void
512 apm_do_standby(void)
513 {
514 struct apm_softc *sc = &apm_softc;
515
516 if (sc == NULL || sc->initialized == 0)
517 return;
518
519 apm_op_inprog = 0;
520 sc->standbys = sc->standby_countdown = 0;
521
522 /*
523 * As far as standby, we don't need to execute
524 * all of suspend hooks.
525 */
526 if (apm_suspend_system(PMST_STANDBY) == 0)
527 apm_processevent();
528 return;
529 }
530
531 static void
532 apm_lastreq_notify(void)
533 {
534 struct apm_softc *sc = &apm_softc;
535
536 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
537 sc->bios.r.ebx = PMDV_ALLDEV;
538 sc->bios.r.ecx = PMST_LASTREQNOTIFY;
539 sc->bios.r.edx = 0;
540 apm_bioscall();
541 }
542
543 static int
544 apm_lastreq_rejected(void)
545 {
546 struct apm_softc *sc = &apm_softc;
547
548 if (apm_op_inprog == 0) {
549 return 1; /* no operation in progress */
550 }
551
552 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
553 sc->bios.r.ebx = PMDV_ALLDEV;
554 sc->bios.r.ecx = PMST_LASTREQREJECT;
555 sc->bios.r.edx = 0;
556
557 if (apm_bioscall()) {
558 APM_DPRINT("apm_lastreq_rejected: failed\n");
559 return 1;
560 }
561 apm_op_inprog = 0;
562 return 0;
563 }
564
565 /*
566 * Public interface to the suspend/resume:
567 *
568 * Execute suspend and resume hook before and after sleep, respectively.
569 *
570 */
571
572 void
573 apm_suspend(int state)
574 {
575 struct apm_softc *sc = &apm_softc;
576
577 if (sc == NULL || sc->initialized == 0)
578 return;
579
580 switch (state) {
581 case PMST_SUSPEND:
582 if (sc->suspends)
583 return;
584 sc->suspends++;
585 sc->suspend_countdown = apm_suspend_delay;
586 break;
587 case PMST_STANDBY:
588 if (sc->standbys)
589 return;
590 sc->standbys++;
591 sc->standby_countdown = apm_standby_delay;
592 break;
593 default:
594 printf("apm_suspend: Unknown Suspend state 0x%x\n", state);
595 return;
596 }
597
598 apm_op_inprog++;
599 apm_lastreq_notify();
600 }
601
602 static void
603 apm_resume(void)
604 {
605 struct apm_softc *sc = &apm_softc;
606
607 if (sc == NULL || sc->initialized == 0 || sc->suspending == 0)
608 return;
609
610 sc->suspending = 0;
611 apm_execute_hook(hook[APM_HOOK_RESUME]);
612 mtx_lock(&Giant);
613 DEVICE_RESUME(root_bus);
614 mtx_unlock(&Giant);
615 return;
616 }
617
618
619 /* get power status per battery */
620 static int
621 apm_get_pwstatus(apm_pwstatus_t app)
622 {
623 struct apm_softc *sc = &apm_softc;
624
625 if (app->ap_device != PMDV_ALLDEV &&
626 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
627 return 1;
628
629 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
630 sc->bios.r.ebx = app->ap_device;
631 sc->bios.r.ecx = 0;
632 sc->bios.r.edx = 0xffff; /* default to unknown battery time */
633
634 if (apm_bioscall())
635 return 1;
636
637 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff;
638 app->ap_batt_stat = sc->bios.r.ebx & 0xff;
639 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff;
640 app->ap_batt_life = sc->bios.r.ecx & 0xff;
641 sc->bios.r.edx &= 0xffff;
642 if (apm_swab_batt_minutes)
643 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000;
644 if (sc->bios.r.edx == 0xffff) /* Time is unknown */
645 app->ap_batt_time = -1;
646 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */
647 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60;
648 else /* Time is in seconds */
649 app->ap_batt_time = sc->bios.r.edx;
650
651 return 0;
652 }
653
654
655 /* get APM information */
656 static int
657 apm_get_info(apm_info_t aip)
658 {
659 struct apm_softc *sc = &apm_softc;
660 struct apm_pwstatus aps;
661
662 bzero(&aps, sizeof(aps));
663 aps.ap_device = PMDV_ALLDEV;
664 if (apm_get_pwstatus(&aps))
665 return 1;
666
667 aip->ai_infoversion = 1;
668 aip->ai_acline = aps.ap_acline;
669 aip->ai_batt_stat = aps.ap_batt_stat;
670 aip->ai_batt_life = aps.ap_batt_life;
671 aip->ai_batt_time = aps.ap_batt_time;
672 aip->ai_major = (u_int)sc->majorversion;
673 aip->ai_minor = (u_int)sc->minorversion;
674 aip->ai_status = (u_int)sc->active;
675
676 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES;
677 sc->bios.r.ebx = 0;
678 sc->bios.r.ecx = 0;
679 sc->bios.r.edx = 0;
680 if (apm_bioscall()) {
681 aip->ai_batteries = 0xffffffff; /* Unknown */
682 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */
683 } else {
684 aip->ai_batteries = sc->bios.r.ebx & 0xff;
685 aip->ai_capabilities = sc->bios.r.ecx & 0xff;
686 }
687
688 bzero(aip->ai_spare, sizeof aip->ai_spare);
689
690 return 0;
691 }
692
693
694 /* inform APM BIOS that CPU is idle */
695 void
696 apm_cpu_idle(void)
697 {
698 struct apm_softc *sc = &apm_softc;
699
700 if (sc->active) {
701
702 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE;
703 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
704 (void) apm_bioscall();
705 }
706 /*
707 * Some APM implementation halts CPU in BIOS, whenever
708 * "CPU-idle" function are invoked, but swtch() of
709 * FreeBSD halts CPU, therefore, CPU is halted twice
710 * in the sched loop. It makes the interrupt latency
711 * terribly long and be able to cause a serious problem
712 * in interrupt processing. We prevent it by removing
713 * "hlt" operation from swtch() and managed it under
714 * APM driver.
715 */
716 if (!sc->active || sc->always_halt_cpu)
717 halt(); /* wait for interrupt */
718 }
719
720 /* inform APM BIOS that CPU is busy */
721 void
722 apm_cpu_busy(void)
723 {
724 struct apm_softc *sc = &apm_softc;
725
726 /*
727 * The APM specification says this is only necessary if your BIOS
728 * slows down the processor in the idle task, otherwise it's not
729 * necessary.
730 */
731 if (sc->slow_idle_cpu && sc->active) {
732
733 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY;
734 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
735 apm_bioscall();
736 }
737 }
738
739
740 /*
741 * APM timeout routine:
742 *
743 * This routine is automatically called by timer once per second.
744 */
745
746 static void
747 apm_timeout(void *dummy)
748 {
749 struct apm_softc *sc = &apm_softc;
750
751 if (apm_op_inprog)
752 apm_lastreq_notify();
753
754 if (sc->standbys && sc->standby_countdown-- <= 0)
755 apm_do_standby();
756
757 if (sc->suspends && sc->suspend_countdown-- <= 0)
758 apm_do_suspend();
759
760 if (!sc->bios_busy)
761 apm_processevent();
762
763 if (sc->active == 1)
764 /* Run slightly more oftan than 1 Hz */
765 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1);
766 }
767
768 /* enable APM BIOS */
769 static void
770 apm_event_enable(void)
771 {
772 struct apm_softc *sc = &apm_softc;
773
774 APM_DPRINT("called apm_event_enable()\n");
775
776 if (sc == NULL || sc->initialized == 0)
777 return;
778
779 sc->active = 1;
780 apm_timeout(sc);
781
782 return;
783 }
784
785 /* disable APM BIOS */
786 static void
787 apm_event_disable(void)
788 {
789 struct apm_softc *sc = &apm_softc;
790
791 APM_DPRINT("called apm_event_disable()\n");
792
793 if (sc == NULL || sc->initialized == 0)
794 return;
795
796 untimeout(apm_timeout, NULL, apm_timeout_ch);
797 sc->active = 0;
798
799 return;
800 }
801
802 /* halt CPU in scheduling loop */
803 static void
804 apm_halt_cpu(void)
805 {
806 struct apm_softc *sc = &apm_softc;
807
808 if (sc == NULL || sc->initialized == 0)
809 return;
810
811 sc->always_halt_cpu = 1;
812
813 return;
814 }
815
816 /* don't halt CPU in scheduling loop */
817 static void
818 apm_not_halt_cpu(void)
819 {
820 struct apm_softc *sc = &apm_softc;
821
822 if (sc == NULL || sc->initialized == 0)
823 return;
824
825 sc->always_halt_cpu = 0;
826
827 return;
828 }
829
830 /* device driver definitions */
831
832 /*
833 * Module event
834 */
835
836 static int
837 apm_modevent(struct module *mod, int event, void *junk)
838 {
839
840 switch (event) {
841 case MOD_LOAD:
842 if (!cold)
843 return (EPERM);
844 break;
845 case MOD_UNLOAD:
846 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM)
847 return (EBUSY);
848 break;
849 default:
850 break;
851 }
852
853 return (0);
854 }
855
856 /*
857 * Create "connection point"
858 */
859 static void
860 apm_identify(driver_t *driver, device_t parent)
861 {
862 device_t child;
863
864 if (!cold) {
865 printf("Don't load this driver from userland!!\n");
866 return;
867 }
868
869 if (resource_disabled("apm", 0))
870 return;
871
872 child = BUS_ADD_CHILD(parent, 0, "apm", 0);
873 if (child == NULL)
874 panic("apm_identify");
875 }
876
877 /*
878 * probe for APM BIOS
879 */
880 static int
881 apm_probe(device_t dev)
882 {
883 #define APM_KERNBASE KERNBASE
884 struct vm86frame vmf;
885 struct apm_softc *sc = &apm_softc;
886 #ifdef PC98
887 int rid;
888 #endif
889
890 device_set_desc(dev, "APM BIOS");
891 if (device_get_unit(dev) > 0) {
892 printf("apm: Only one APM driver supported.\n");
893 return ENXIO;
894 }
895
896 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
897 power_pm_get_type() != POWER_PM_TYPE_APM) {
898 printf("apm: Other PM system enabled.\n");
899 return ENXIO;
900 }
901
902 bzero(&vmf, sizeof(struct vm86frame)); /* safety */
903 bzero(&apm_softc, sizeof(apm_softc));
904 vmf.vmf_ah = APM_BIOS;
905 vmf.vmf_al = APM_INSTCHECK;
906 vmf.vmf_bx = 0;
907 if (vm86_intcall(APM_INT, &vmf))
908 return ENXIO; /* APM not found */
909 if (vmf.vmf_bx != 0x504d) {
910 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
911 return ENXIO;
912 }
913 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
914 printf("apm: protected mode connections are not supported\n");
915 return ENXIO;
916 }
917
918 apm_version = vmf.vmf_ax;
919 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
920 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
921 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
922
923 vmf.vmf_ah = APM_BIOS;
924 vmf.vmf_al = APM_DISCONNECT;
925 vmf.vmf_bx = 0;
926 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */
927
928 #ifdef PC98
929 /* PC98 have bogos APM 32bit BIOS */
930 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0)
931 return ENXIO;
932 rid = 0;
933 bus_set_resource(dev, SYS_RES_IOPORT, rid,
934 APM_NECSMM_PORT, APM_NECSMM_PORTSZ);
935 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
936 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
937 if (sc->sc_res == NULL) {
938 printf("apm: cannot open NEC smm device\n");
939 return ENXIO;
940 }
941 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res);
942
943 vmf.vmf_ah = APM_BIOS;
944 vmf.vmf_al = APM_PROT32CONNECT;
945 vmf.vmf_bx = 0;
946 if (vm86_intcall(APM_INT, &vmf)) {
947 printf("apm: 32-bit connection error.\n");
948 return (ENXIO);
949 }
950
951 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
952 sc->bios.seg.code32.limit = 0xffff;
953 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
954 sc->bios.seg.code16.limit = 0xffff;
955 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
956 sc->bios.seg.data.limit = 0xffff;
957 sc->bios.entry = vmf.vmf_ebx;
958 sc->connectmode = APM_PROT32CONNECT;
959 #else
960 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
961 vmf.vmf_ah = APM_BIOS;
962 vmf.vmf_al = APM_PROT32CONNECT;
963 vmf.vmf_bx = 0;
964 if (vm86_intcall(APM_INT, &vmf)) {
965 printf("apm: 32-bit connection error.\n");
966 return (ENXIO);
967 }
968 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
969 sc->bios.seg.code32.limit = 0xffff;
970 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
971 sc->bios.seg.code16.limit = 0xffff;
972 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
973 sc->bios.seg.data.limit = 0xffff;
974 sc->bios.entry = vmf.vmf_ebx;
975 sc->connectmode = APM_PROT32CONNECT;
976 } else {
977 /* use 16-bit connection */
978 vmf.vmf_ah = APM_BIOS;
979 vmf.vmf_al = APM_PROT16CONNECT;
980 vmf.vmf_bx = 0;
981 if (vm86_intcall(APM_INT, &vmf)) {
982 printf("apm: 16-bit connection error.\n");
983 return (ENXIO);
984 }
985 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
986 sc->bios.seg.code16.limit = 0xffff;
987 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
988 sc->bios.seg.data.limit = 0xffff;
989 sc->bios.entry = vmf.vmf_bx;
990 sc->connectmode = APM_PROT16CONNECT;
991 }
992 #endif
993 return(0);
994 }
995
996
997 /*
998 * return 0 if the user will notice and handle the event,
999 * return 1 if the kernel driver should do so.
1000 */
1001 static int
1002 apm_record_event(struct apm_softc *sc, u_int event_type)
1003 {
1004 struct apm_event_info *evp;
1005
1006 if ((sc->sc_flags & SCFLAG_OPEN) == 0)
1007 return 1; /* no user waiting */
1008 if (sc->event_count == APM_NEVENTS)
1009 return 1; /* overflow */
1010 if (sc->event_filter[event_type] == 0)
1011 return 1; /* not registered */
1012 evp = &sc->event_list[sc->event_ptr];
1013 sc->event_count++;
1014 sc->event_ptr++;
1015 sc->event_ptr %= APM_NEVENTS;
1016 evp->type = event_type;
1017 evp->index = ++apm_evindex;
1018 selwakeuppri(&sc->sc_rsel, PZERO);
1019 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
1020 }
1021
1022 /* Power profile */
1023 static void
1024 apm_power_profile(struct apm_softc *sc)
1025 {
1026 int state;
1027 struct apm_info info;
1028 static int apm_acline = 0;
1029
1030 if (apm_get_info(&info))
1031 return;
1032
1033 if (apm_acline != info.ai_acline) {
1034 apm_acline = info.ai_acline;
1035 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY;
1036 power_profile_set_state(state);
1037 }
1038 }
1039
1040 /* Process APM event */
1041 static void
1042 apm_processevent(void)
1043 {
1044 int apm_event;
1045 struct apm_softc *sc = &apm_softc;
1046
1047 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
1048 APM_DPRINT("Received APM Event: " #symbol "\n");
1049
1050 do {
1051 apm_event = apm_getevent();
1052 switch (apm_event) {
1053 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
1054 if (apm_op_inprog == 0) {
1055 apm_op_inprog++;
1056 if (apm_record_event(sc, apm_event)) {
1057 apm_suspend(PMST_STANDBY);
1058 }
1059 }
1060 break;
1061 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ);
1062 if (apm_op_inprog == 0) {
1063 apm_op_inprog++;
1064 if (apm_record_event(sc, apm_event)) {
1065 apm_suspend(PMST_STANDBY);
1066 }
1067 }
1068 break;
1069 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
1070 apm_lastreq_notify();
1071 if (apm_op_inprog == 0) {
1072 apm_op_inprog++;
1073 if (apm_record_event(sc, apm_event)) {
1074 apm_do_suspend();
1075 }
1076 }
1077 return; /* XXX skip the rest */
1078 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
1079 apm_lastreq_notify();
1080 if (apm_op_inprog == 0) {
1081 apm_op_inprog++;
1082 if (apm_record_event(sc, apm_event)) {
1083 apm_do_suspend();
1084 }
1085 }
1086 return; /* XXX skip the rest */
1087 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
1088 apm_do_suspend();
1089 break;
1090 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
1091 apm_record_event(sc, apm_event);
1092 apm_resume();
1093 break;
1094 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
1095 apm_record_event(sc, apm_event);
1096 apm_resume();
1097 break;
1098 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
1099 apm_record_event(sc, apm_event);
1100 break;
1101 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
1102 if (apm_record_event(sc, apm_event)) {
1103 apm_battery_low();
1104 apm_suspend(PMST_SUSPEND);
1105 }
1106 break;
1107 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
1108 apm_record_event(sc, apm_event);
1109 apm_power_profile(sc);
1110 break;
1111 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
1112 apm_record_event(sc, apm_event);
1113 inittodr(0); /* adjust time to RTC */
1114 break;
1115 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
1116 apm_record_event(sc, apm_event);
1117 apm_power_profile(sc);
1118 break;
1119 case PMEV_NOEVENT:
1120 break;
1121 default:
1122 printf("Unknown Original APM Event 0x%x\n", apm_event);
1123 break;
1124 }
1125 } while (apm_event != PMEV_NOEVENT);
1126 #ifdef PC98
1127 apm_disable_smm(sc);
1128 #endif
1129 }
1130
1131 /*
1132 * Attach APM:
1133 *
1134 * Initialize APM driver
1135 */
1136
1137 static int
1138 apm_attach(device_t dev)
1139 {
1140 struct apm_softc *sc = &apm_softc;
1141 int drv_version;
1142 #ifdef PC98
1143 int rid;
1144 #endif
1145
1146 if (device_get_flags(dev) & 0x20)
1147 statclock_disable = 1;
1148
1149 sc->initialized = 0;
1150
1151 /* Must be externally enabled */
1152 sc->active = 0;
1153
1154 /* Always call HLT in idle loop */
1155 sc->always_halt_cpu = 1;
1156
1157 getenv_int("debug.apm_debug", &apm_debug);
1158
1159 /* print bootstrap messages */
1160 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version);
1161 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n",
1162 sc->bios.seg.code16.base, sc->bios.seg.data.base);
1163 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
1164 sc->bios.entry, is_enabled(sc->slow_idle_cpu),
1165 is_enabled(!sc->disabled));
1166 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n",
1167 sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
1168
1169 #ifdef PC98
1170 rid = 0;
1171 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
1172 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
1173 if (sc->sc_res == NULL)
1174 panic("%s: counldn't map I/O ports", device_get_name(dev));
1175 sc->sc_iot = rman_get_bustag(sc->sc_res);
1176 sc->sc_ioh = rman_get_bushandle(sc->sc_res);
1177
1178 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110)
1179 apm_necsmm_addr = APM_NECSMM_PORT;
1180 else
1181 apm_necsmm_addr = 0;
1182 apm_necsmm_mask = ~APM_NECSMM_EN;
1183 #endif /* PC98 */
1184
1185 /*
1186 * In one test, apm bios version was 1.02; an attempt to register
1187 * a 1.04 driver resulted in a 1.00 connection! Registering a
1188 * 1.02 driver resulted in a 1.02 connection.
1189 */
1190 drv_version = apm_version > 0x102 ? 0x102 : apm_version;
1191 for (; drv_version > 0x100; drv_version--)
1192 if (apm_driver_version(drv_version) == 0)
1193 break;
1194 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 +
1195 ((drv_version & 0x000f) >> 0);
1196 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
1197 ((apm_version & 0x0f00) >> 8);
1198
1199 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
1200
1201 if (sc->intversion >= INTVERSION(1, 1))
1202 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
1203 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n",
1204 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
1205 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
1206 sc->majorversion, sc->minorversion);
1207
1208
1209 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
1210 /* enable power management */
1211 if (sc->disabled) {
1212 if (apm_enable_disable_pm(1)) {
1213 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n",
1214 (sc->bios.r.eax >> 8) & 0xff);
1215 }
1216 }
1217
1218 /* engage power managment (APM 1.1 or later) */
1219 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
1220 if (apm_engage_disengage_pm(1)) {
1221 APM_DPRINT("apm: *Warning* engage function failed err=[%x]",
1222 (sc->bios.r.eax >> 8) & 0xff);
1223 APM_DPRINT(" (Docked or using external power?).\n");
1224 }
1225 }
1226
1227 /* Power the system off using APM */
1228 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL,
1229 SHUTDOWN_PRI_LAST);
1230
1231 /* Register APM again to pass the correct argument of pm_func. */
1232 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc);
1233
1234 sc->initialized = 1;
1235 sc->suspending = 0;
1236
1237 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm");
1238 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl");
1239 return 0;
1240 }
1241
1242 static int
1243 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td)
1244 {
1245 struct apm_softc *sc = &apm_softc;
1246 int ctl = APMDEV(dev);
1247
1248 if (sc == NULL || sc->initialized == 0)
1249 return (ENXIO);
1250
1251 switch (ctl) {
1252 case APMDEV_CTL:
1253 if (!(flag & FWRITE))
1254 return EINVAL;
1255 if (sc->sc_flags & SCFLAG_OCTL)
1256 return EBUSY;
1257 sc->sc_flags |= SCFLAG_OCTL;
1258 bzero(sc->event_filter, sizeof sc->event_filter);
1259 break;
1260 case APMDEV_NORMAL:
1261 sc->sc_flags |= SCFLAG_ONORMAL;
1262 break;
1263 default:
1264 return ENXIO;
1265 break;
1266 }
1267 return 0;
1268 }
1269
1270 static int
1271 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td)
1272 {
1273 struct apm_softc *sc = &apm_softc;
1274 int ctl = APMDEV(dev);
1275
1276 switch (ctl) {
1277 case APMDEV_CTL:
1278 apm_lastreq_rejected();
1279 sc->sc_flags &= ~SCFLAG_OCTL;
1280 bzero(sc->event_filter, sizeof sc->event_filter);
1281 break;
1282 case APMDEV_NORMAL:
1283 sc->sc_flags &= ~SCFLAG_ONORMAL;
1284 break;
1285 }
1286 if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
1287 sc->event_count = 0;
1288 sc->event_ptr = 0;
1289 }
1290 return 0;
1291 }
1292
1293 static int
1294 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1295 {
1296 struct apm_softc *sc = &apm_softc;
1297 struct apm_bios_arg *args;
1298 int error = 0;
1299 int ret;
1300 int newstate;
1301
1302 if (sc == NULL || sc->initialized == 0)
1303 return (ENXIO);
1304
1305 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd);
1306 switch (cmd) {
1307 case APMIO_SUSPEND:
1308 if (!(flag & FWRITE))
1309 return (EPERM);
1310 if (sc->active)
1311 apm_suspend(PMST_SUSPEND);
1312 else
1313 error = EINVAL;
1314 break;
1315
1316 case APMIO_STANDBY:
1317 if (!(flag & FWRITE))
1318 return (EPERM);
1319 if (sc->active)
1320 apm_suspend(PMST_STANDBY);
1321 else
1322 error = EINVAL;
1323 break;
1324
1325 case APMIO_GETINFO_OLD:
1326 {
1327 struct apm_info info;
1328 apm_info_old_t aiop;
1329
1330 if (apm_get_info(&info))
1331 error = ENXIO;
1332 aiop = (apm_info_old_t)addr;
1333 aiop->ai_major = info.ai_major;
1334 aiop->ai_minor = info.ai_minor;
1335 aiop->ai_acline = info.ai_acline;
1336 aiop->ai_batt_stat = info.ai_batt_stat;
1337 aiop->ai_batt_life = info.ai_batt_life;
1338 aiop->ai_status = info.ai_status;
1339 }
1340 break;
1341 case APMIO_GETINFO:
1342 if (apm_get_info((apm_info_t)addr))
1343 error = ENXIO;
1344 break;
1345 case APMIO_GETPWSTATUS:
1346 if (apm_get_pwstatus((apm_pwstatus_t)addr))
1347 error = ENXIO;
1348 break;
1349 case APMIO_ENABLE:
1350 if (!(flag & FWRITE))
1351 return (EPERM);
1352 apm_event_enable();
1353 break;
1354 case APMIO_DISABLE:
1355 if (!(flag & FWRITE))
1356 return (EPERM);
1357 apm_event_disable();
1358 break;
1359 case APMIO_HALTCPU:
1360 if (!(flag & FWRITE))
1361 return (EPERM);
1362 apm_halt_cpu();
1363 break;
1364 case APMIO_NOTHALTCPU:
1365 if (!(flag & FWRITE))
1366 return (EPERM);
1367 apm_not_halt_cpu();
1368 break;
1369 case APMIO_DISPLAY:
1370 if (!(flag & FWRITE))
1371 return (EPERM);
1372 newstate = *(int *)addr;
1373 if (apm_display(newstate))
1374 error = ENXIO;
1375 break;
1376 case APMIO_BIOS:
1377 if (!(flag & FWRITE))
1378 return (EPERM);
1379 /* XXX compatibility with the old interface */
1380 args = (struct apm_bios_arg *)addr;
1381 sc->bios.r.eax = args->eax;
1382 sc->bios.r.ebx = args->ebx;
1383 sc->bios.r.ecx = args->ecx;
1384 sc->bios.r.edx = args->edx;
1385 sc->bios.r.esi = args->esi;
1386 sc->bios.r.edi = args->edi;
1387 if ((ret = apm_bioscall())) {
1388 /*
1389 * Return code 1 means bios call was unsuccessful.
1390 * Error code is stored in %ah.
1391 * Return code -1 means bios call was unsupported
1392 * in the APM BIOS version.
1393 */
1394 if (ret == -1) {
1395 error = EINVAL;
1396 }
1397 } else {
1398 /*
1399 * Return code 0 means bios call was successful.
1400 * We need only %al and can discard %ah.
1401 */
1402 sc->bios.r.eax &= 0xff;
1403 }
1404 args->eax = sc->bios.r.eax;
1405 args->ebx = sc->bios.r.ebx;
1406 args->ecx = sc->bios.r.ecx;
1407 args->edx = sc->bios.r.edx;
1408 args->esi = sc->bios.r.esi;
1409 args->edi = sc->bios.r.edi;
1410 break;
1411 default:
1412 error = EINVAL;
1413 break;
1414 }
1415
1416 /* for /dev/apmctl */
1417 if (APMDEV(dev) == APMDEV_CTL) {
1418 struct apm_event_info *evp;
1419 int i;
1420
1421 error = 0;
1422 switch (cmd) {
1423 case APMIO_NEXTEVENT:
1424 if (!sc->event_count) {
1425 error = EAGAIN;
1426 } else {
1427 evp = (struct apm_event_info *)addr;
1428 i = sc->event_ptr + APM_NEVENTS - sc->event_count;
1429 i %= APM_NEVENTS;
1430 *evp = sc->event_list[i];
1431 sc->event_count--;
1432 }
1433 break;
1434 case APMIO_REJECTLASTREQ:
1435 if (apm_lastreq_rejected()) {
1436 error = EINVAL;
1437 }
1438 break;
1439 default:
1440 error = EINVAL;
1441 break;
1442 }
1443 }
1444
1445 return error;
1446 }
1447
1448 static int
1449 apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
1450 {
1451 struct apm_softc *sc = &apm_softc;
1452 u_int event_type;
1453 int error;
1454 u_char enabled;
1455
1456 if (APMDEV(dev) != APMDEV_CTL)
1457 return(ENODEV);
1458 if (uio->uio_resid != sizeof(u_int))
1459 return(E2BIG);
1460
1461 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
1462 return(error);
1463
1464 if (event_type < 0 || event_type >= APM_NPMEV)
1465 return(EINVAL);
1466
1467 if (sc->event_filter[event_type] == 0) {
1468 enabled = 1;
1469 } else {
1470 enabled = 0;
1471 }
1472 sc->event_filter[event_type] = enabled;
1473 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
1474
1475 return uio->uio_resid;
1476 }
1477
1478 static int
1479 apmpoll(struct cdev *dev, int events, struct thread *td)
1480 {
1481 struct apm_softc *sc = &apm_softc;
1482 int revents = 0;
1483
1484 if (events & (POLLIN | POLLRDNORM)) {
1485 if (sc->event_count) {
1486 revents |= events & (POLLIN | POLLRDNORM);
1487 } else {
1488 selrecord(td, &sc->sc_rsel);
1489 }
1490 }
1491
1492 return (revents);
1493 }
1494
1495 static device_method_t apm_methods[] = {
1496 /* Device interface */
1497 DEVMETHOD(device_identify, apm_identify),
1498 DEVMETHOD(device_probe, apm_probe),
1499 DEVMETHOD(device_attach, apm_attach),
1500
1501 { 0, 0 }
1502 };
1503
1504 static driver_t apm_driver = {
1505 "apm",
1506 apm_methods,
1507 1, /* no softc (XXX) */
1508 };
1509
1510 static devclass_t apm_devclass;
1511
1512 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0);
1513 MODULE_VERSION(apm, 1);
1514
1515 static int
1516 apm_pm_func(u_long cmd, void *arg, ...)
1517 {
1518 int state, apm_state;
1519 int error;
1520 va_list ap;
1521
1522 error = 0;
1523 switch (cmd) {
1524 case POWER_CMD_SUSPEND:
1525 va_start(ap, arg);
1526 state = va_arg(ap, int);
1527 va_end(ap);
1528
1529 switch (state) {
1530 case POWER_SLEEP_STATE_STANDBY:
1531 apm_state = PMST_STANDBY;
1532 break;
1533 case POWER_SLEEP_STATE_SUSPEND:
1534 case POWER_SLEEP_STATE_HIBERNATE:
1535 apm_state = PMST_SUSPEND;
1536 break;
1537 default:
1538 error = EINVAL;
1539 goto out;
1540 }
1541
1542 apm_suspend(apm_state);
1543 break;
1544
1545 default:
1546 error = EINVAL;
1547 goto out;
1548 }
1549
1550 out:
1551 return (error);
1552 }
1553
1554 static void
1555 apm_pm_register(void *arg)
1556 {
1557
1558 if (!resource_disabled("apm", 0))
1559 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL);
1560 }
1561
1562 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);
Cache object: 46afef5e0858858d4ba9abadb89af55e
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