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/8.0/sys/i386/bios/apm.c 191781 2009-05-04 08:41:54Z mav $");
21
22 #include <sys/param.h>
23 #include <sys/systm.h>
24 #include <sys/bus.h>
25 #include <sys/conf.h>
26 #include <sys/condvar.h>
27 #include <sys/eventhandler.h>
28 #include <sys/fcntl.h>
29 #include <sys/kernel.h>
30 #include <sys/kthread.h>
31 #include <sys/lock.h>
32 #include <sys/module.h>
33 #include <sys/mutex.h>
34 #include <sys/poll.h>
35 #include <sys/power.h>
36 #include <sys/reboot.h>
37 #include <sys/selinfo.h>
38 #include <sys/signalvar.h>
39 #include <sys/sysctl.h>
40 #include <sys/syslog.h>
41 #include <sys/time.h>
42 #include <sys/uio.h>
43
44 #include <machine/apm_bios.h>
45 #include <machine/clock.h>
46 #include <machine/endian.h>
47 #include <machine/pc/bios.h>
48 #include <machine/cpufunc.h>
49 #include <machine/segments.h>
50 #include <machine/stdarg.h>
51 #include <machine/vm86.h>
52
53 #include <machine/bus.h>
54 #include <machine/resource.h>
55 #include <sys/rman.h>
56
57 #include <vm/vm.h>
58 #include <vm/pmap.h>
59 #include <vm/vm_param.h>
60
61 #include <i386/bios/apm.h>
62 #include <isa/rtc.h>
63
64 /* Used by the apm_saver screen saver module */
65 int apm_display(int newstate);
66 struct apm_softc apm_softc;
67
68 static void apm_resume(void);
69 static int apm_bioscall(void);
70 static int apm_check_function_supported(u_int version, u_int func);
71
72 static int apm_pm_func(u_long, void*, ...);
73
74 static u_long apm_version;
75
76 int apm_evindex;
77
78 #define SCFLAG_ONORMAL 0x0000001
79 #define SCFLAG_OCTL 0x0000002
80 #define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL)
81
82 #define APMDEV(dev) (dev2unit(dev)&0x0f)
83 #define APMDEV_NORMAL 0
84 #define APMDEV_CTL 8
85
86 #ifdef PC98
87 extern int bios32_apm98(struct bios_regs *, u_int, u_short);
88
89 /* PC98's SMM definition */
90 #define APM_NECSMM_PORT 0x6b8e
91 #define APM_NECSMM_PORTSZ 1
92 #define APM_NECSMM_EN 0x10
93 static __inline void apm_enable_smm(struct apm_softc *);
94 static __inline void apm_disable_smm(struct apm_softc *);
95 int apm_necsmm_addr;
96 u_int32_t apm_necsmm_mask;
97 #endif
98
99 static struct apmhook *hook[NAPM_HOOK]; /* XXX */
100
101 #define is_enabled(foo) ((foo) ? "enabled" : "disabled")
102
103 /* Map version number to integer (keeps ordering of version numbers) */
104 #define INTVERSION(major, minor) ((major)*100 + (minor))
105
106 static d_open_t apmopen;
107 static d_close_t apmclose;
108 static d_write_t apmwrite;
109 static d_ioctl_t apmioctl;
110 static d_poll_t apmpoll;
111
112 static struct cdevsw apm_cdevsw = {
113 .d_version = D_VERSION,
114 .d_flags = D_NEEDGIANT,
115 .d_open = apmopen,
116 .d_close = apmclose,
117 .d_write = apmwrite,
118 .d_ioctl = apmioctl,
119 .d_poll = apmpoll,
120 .d_name = "apm",
121 };
122
123 static int apm_suspend_delay = 1;
124 static int apm_standby_delay = 1;
125 static int apm_swab_batt_minutes = 0;
126 static int apm_debug = 0;
127
128 #define APM_DPRINT(args...) do { \
129 if (apm_debug) { \
130 printf(args); \
131 } \
132 } while (0)
133
134 SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, "");
135 SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, "");
136 SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, "");
137
138 TUNABLE_INT("machdep.apm_swab_batt_minutes", &apm_swab_batt_minutes);
139 SYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RW,
140 &apm_swab_batt_minutes, 0, "Byte swap battery time value.");
141
142 #ifdef PC98
143 static __inline void
144 apm_enable_smm(sc)
145 struct apm_softc *sc;
146 {
147 bus_space_tag_t iot = sc->sc_iot;
148 bus_space_handle_t ioh = sc->sc_ioh;
149 if (apm_necsmm_addr != 0)
150 bus_space_write_1(iot, ioh, 0,
151 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask));
152 }
153
154 static __inline void
155 apm_disable_smm(sc)
156 struct apm_softc *sc;
157 {
158 bus_space_tag_t iot = sc->sc_iot;
159 bus_space_handle_t ioh = sc->sc_ioh;
160 if (apm_necsmm_addr != 0)
161 bus_space_write_1(iot, ioh, 0,
162 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask));
163 }
164 #endif
165
166 /*
167 * return 0 if the function successfull,
168 * return 1 if the function unsuccessfull,
169 * return -1 if the function unsupported.
170 */
171 static int
172 apm_bioscall(void)
173 {
174 struct apm_softc *sc = &apm_softc;
175 int errno = 0;
176 u_int apm_func = sc->bios.r.eax & 0xff;
177
178 if (!apm_check_function_supported(sc->intversion, apm_func)) {
179 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n",
180 apm_func, sc->majorversion, sc->minorversion);
181 return (-1);
182 }
183
184 sc->bios_busy = 1;
185 #ifdef PC98
186 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG);
187 if (bios32_apm98(&sc->bios.r, sc->bios.entry,
188 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0)
189 return 1;
190 #else
191 if (sc->connectmode == APM_PROT32CONNECT) {
192 set_bios_selectors(&sc->bios.seg,
193 BIOSCODE_FLAG | BIOSDATA_FLAG);
194 errno = bios32(&sc->bios.r,
195 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL));
196 } else {
197 errno = bios16(&sc->bios, NULL);
198 }
199 #endif
200 sc->bios_busy = 0;
201 return (errno);
202 }
203
204 /* check whether APM function is supported (1) or not (0). */
205 static int
206 apm_check_function_supported(u_int version, u_int func)
207 {
208 /* except driver version */
209 if (func == APM_DRVVERSION) {
210 return (1);
211 }
212 #ifdef PC98
213 if (func == APM_GETPWSTATUS) {
214 return (1);
215 }
216 #endif
217
218 switch (version) {
219 case INTVERSION(1, 0):
220 if (func > APM_GETPMEVENT) {
221 return (0); /* not supported */
222 }
223 break;
224 case INTVERSION(1, 1):
225 if (func > APM_ENGAGEDISENGAGEPM &&
226 func < APM_OEMFUNC) {
227 return (0); /* not supported */
228 }
229 break;
230 case INTVERSION(1, 2):
231 break;
232 }
233
234 return (1); /* supported */
235 }
236
237 /* enable/disable power management */
238 static int
239 apm_enable_disable_pm(int enable)
240 {
241 struct apm_softc *sc = &apm_softc;
242
243 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
244
245 if (sc->intversion >= INTVERSION(1, 1))
246 sc->bios.r.ebx = PMDV_ALLDEV;
247 else
248 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */
249 sc->bios.r.ecx = enable;
250 sc->bios.r.edx = 0;
251 return (apm_bioscall());
252 }
253
254 /* register driver version (APM 1.1 or later) */
255 static int
256 apm_driver_version(int version)
257 {
258 struct apm_softc *sc = &apm_softc;
259
260 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION;
261 sc->bios.r.ebx = 0x0;
262 sc->bios.r.ecx = version;
263 sc->bios.r.edx = 0;
264
265 if (apm_bioscall() == 0 && sc->bios.r.eax == version)
266 return (0);
267
268 /* Some old BIOSes don't return the connection version in %ax. */
269 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION))
270 return (0);
271
272 return (1);
273 }
274
275 /* engage/disengage power management (APM 1.1 or later) */
276 static int
277 apm_engage_disengage_pm(int engage)
278 {
279 struct apm_softc *sc = &apm_softc;
280
281 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
282 sc->bios.r.ebx = PMDV_ALLDEV;
283 sc->bios.r.ecx = engage;
284 sc->bios.r.edx = 0;
285 return (apm_bioscall());
286 }
287
288 /* get PM event */
289 static u_int
290 apm_getevent(void)
291 {
292 struct apm_softc *sc = &apm_softc;
293
294 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT;
295
296 sc->bios.r.ebx = 0;
297 sc->bios.r.ecx = 0;
298 sc->bios.r.edx = 0;
299 if (apm_bioscall())
300 return (PMEV_NOEVENT);
301 return (sc->bios.r.ebx & 0xffff);
302 }
303
304 /* suspend entire system */
305 static int
306 apm_suspend_system(int state)
307 {
308 struct apm_softc *sc = &apm_softc;
309
310 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
311 sc->bios.r.ebx = PMDV_ALLDEV;
312 sc->bios.r.ecx = state;
313 sc->bios.r.edx = 0;
314
315 #ifdef PC98
316 apm_disable_smm(sc);
317 #endif
318 if (apm_bioscall()) {
319 printf("Entire system suspend failure: errcode = %d\n",
320 0xff & (sc->bios.r.eax >> 8));
321 return 1;
322 }
323 #ifdef PC98
324 apm_enable_smm(sc);
325 #endif
326 return 0;
327 }
328
329 /* Display control */
330 /*
331 * Experimental implementation: My laptop machine can't handle this function
332 * If your laptop can control the display via APM, please inform me.
333 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
334 */
335 int
336 apm_display(int newstate)
337 {
338 struct apm_softc *sc = &apm_softc;
339
340 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
341 sc->bios.r.ebx = PMDV_DISP0;
342 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
343 sc->bios.r.edx = 0;
344 if (apm_bioscall() == 0) {
345 return 0;
346 }
347
348 /* If failed, then try to blank all display devices instead. */
349 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
350 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */
351 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
352 sc->bios.r.edx = 0;
353 if (apm_bioscall() == 0) {
354 return 0;
355 }
356 printf("Display off failure: errcode = %d\n",
357 0xff & (sc->bios.r.eax >> 8));
358 return 1;
359 }
360
361 /*
362 * Turn off the entire system.
363 */
364 static void
365 apm_power_off(void *junk, int howto)
366 {
367 struct apm_softc *sc = &apm_softc;
368
369 /* Not halting powering off, or not active */
370 if (!(howto & RB_POWEROFF) || !apm_softc.active)
371 return;
372 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
373 sc->bios.r.ebx = PMDV_ALLDEV;
374 sc->bios.r.ecx = PMST_OFF;
375 sc->bios.r.edx = 0;
376 (void) apm_bioscall();
377 }
378
379 /* APM Battery low handler */
380 static void
381 apm_battery_low(void)
382 {
383 printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
384 }
385
386 /* APM hook manager */
387 static struct apmhook *
388 apm_add_hook(struct apmhook **list, struct apmhook *ah)
389 {
390 int s;
391 struct apmhook *p, *prev;
392
393 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name);
394
395 s = splhigh();
396 if (ah == NULL)
397 panic("illegal apm_hook!");
398 prev = NULL;
399 for (p = *list; p != NULL; prev = p, p = p->ah_next)
400 if (p->ah_order > ah->ah_order)
401 break;
402
403 if (prev == NULL) {
404 ah->ah_next = *list;
405 *list = ah;
406 } else {
407 ah->ah_next = prev->ah_next;
408 prev->ah_next = ah;
409 }
410 splx(s);
411 return ah;
412 }
413
414 static void
415 apm_del_hook(struct apmhook **list, struct apmhook *ah)
416 {
417 int s;
418 struct apmhook *p, *prev;
419
420 s = splhigh();
421 prev = NULL;
422 for (p = *list; p != NULL; prev = p, p = p->ah_next)
423 if (p == ah)
424 goto deleteit;
425 panic("Tried to delete unregistered apm_hook.");
426 goto nosuchnode;
427 deleteit:
428 if (prev != NULL)
429 prev->ah_next = p->ah_next;
430 else
431 *list = p->ah_next;
432 nosuchnode:
433 splx(s);
434 }
435
436
437 /* APM driver calls some functions automatically */
438 static void
439 apm_execute_hook(struct apmhook *list)
440 {
441 struct apmhook *p;
442
443 for (p = list; p != NULL; p = p->ah_next) {
444 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name);
445 if ((*(p->ah_fun))(p->ah_arg))
446 printf("Warning: APM hook \"%s\" failed", p->ah_name);
447 }
448 }
449
450
451 /* establish an apm hook */
452 struct apmhook *
453 apm_hook_establish(int apmh, struct apmhook *ah)
454 {
455 if (apmh < 0 || apmh >= NAPM_HOOK)
456 return NULL;
457
458 return apm_add_hook(&hook[apmh], ah);
459 }
460
461 /* disestablish an apm hook */
462 void
463 apm_hook_disestablish(int apmh, struct apmhook *ah)
464 {
465 if (apmh < 0 || apmh >= NAPM_HOOK)
466 return;
467
468 apm_del_hook(&hook[apmh], ah);
469 }
470
471 static int apm_record_event(struct apm_softc *, u_int);
472 static void apm_processevent(void);
473
474 static u_int apm_op_inprog = 0;
475
476 static void
477 apm_do_suspend(void)
478 {
479 struct apm_softc *sc = &apm_softc;
480 int error;
481
482 if (sc == NULL || sc->initialized == 0)
483 return;
484
485 apm_op_inprog = 0;
486 sc->suspends = sc->suspend_countdown = 0;
487
488 /*
489 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since
490 * non-MPSAFE drivers need this.
491 */
492 mtx_lock(&Giant);
493 error = DEVICE_SUSPEND(root_bus);
494 if (error) {
495 mtx_unlock(&Giant);
496 return;
497 }
498
499 apm_execute_hook(hook[APM_HOOK_SUSPEND]);
500 if (apm_suspend_system(PMST_SUSPEND) == 0) {
501 sc->suspending = 1;
502 apm_processevent();
503 } else {
504 /* Failure, 'resume' the system again */
505 apm_execute_hook(hook[APM_HOOK_RESUME]);
506 DEVICE_RESUME(root_bus);
507 }
508 mtx_unlock(&Giant);
509 return;
510 }
511
512 static void
513 apm_do_standby(void)
514 {
515 struct apm_softc *sc = &apm_softc;
516
517 if (sc == NULL || sc->initialized == 0)
518 return;
519
520 apm_op_inprog = 0;
521 sc->standbys = sc->standby_countdown = 0;
522
523 /*
524 * As far as standby, we don't need to execute
525 * all of suspend hooks.
526 */
527 if (apm_suspend_system(PMST_STANDBY) == 0)
528 apm_processevent();
529 return;
530 }
531
532 static void
533 apm_lastreq_notify(void)
534 {
535 struct apm_softc *sc = &apm_softc;
536
537 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
538 sc->bios.r.ebx = PMDV_ALLDEV;
539 sc->bios.r.ecx = PMST_LASTREQNOTIFY;
540 sc->bios.r.edx = 0;
541 apm_bioscall();
542 }
543
544 static int
545 apm_lastreq_rejected(void)
546 {
547 struct apm_softc *sc = &apm_softc;
548
549 if (apm_op_inprog == 0) {
550 return 1; /* no operation in progress */
551 }
552
553 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
554 sc->bios.r.ebx = PMDV_ALLDEV;
555 sc->bios.r.ecx = PMST_LASTREQREJECT;
556 sc->bios.r.edx = 0;
557
558 if (apm_bioscall()) {
559 APM_DPRINT("apm_lastreq_rejected: failed\n");
560 return 1;
561 }
562 apm_op_inprog = 0;
563 return 0;
564 }
565
566 /*
567 * Public interface to the suspend/resume:
568 *
569 * Execute suspend and resume hook before and after sleep, respectively.
570 *
571 */
572
573 void
574 apm_suspend(int state)
575 {
576 struct apm_softc *sc = &apm_softc;
577
578 if (sc == NULL || sc->initialized == 0)
579 return;
580
581 switch (state) {
582 case PMST_SUSPEND:
583 if (sc->suspends)
584 return;
585 sc->suspends++;
586 sc->suspend_countdown = apm_suspend_delay;
587 break;
588 case PMST_STANDBY:
589 if (sc->standbys)
590 return;
591 sc->standbys++;
592 sc->standby_countdown = apm_standby_delay;
593 break;
594 default:
595 printf("apm_suspend: Unknown Suspend state 0x%x\n", state);
596 return;
597 }
598
599 apm_op_inprog++;
600 apm_lastreq_notify();
601 }
602
603 static void
604 apm_resume(void)
605 {
606 struct apm_softc *sc = &apm_softc;
607
608 if (sc == NULL || sc->initialized == 0 || sc->suspending == 0)
609 return;
610
611 sc->suspending = 0;
612 apm_execute_hook(hook[APM_HOOK_RESUME]);
613 mtx_lock(&Giant);
614 DEVICE_RESUME(root_bus);
615 mtx_unlock(&Giant);
616 return;
617 }
618
619
620 /* get power status per battery */
621 static int
622 apm_get_pwstatus(apm_pwstatus_t app)
623 {
624 struct apm_softc *sc = &apm_softc;
625
626 if (app->ap_device != PMDV_ALLDEV &&
627 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
628 return 1;
629
630 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
631 sc->bios.r.ebx = app->ap_device;
632 sc->bios.r.ecx = 0;
633 sc->bios.r.edx = 0xffff; /* default to unknown battery time */
634
635 if (apm_bioscall())
636 return 1;
637
638 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff;
639 app->ap_batt_stat = sc->bios.r.ebx & 0xff;
640 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff;
641 app->ap_batt_life = sc->bios.r.ecx & 0xff;
642 sc->bios.r.edx &= 0xffff;
643 if (apm_swab_batt_minutes)
644 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000;
645 if (sc->bios.r.edx == 0xffff) /* Time is unknown */
646 app->ap_batt_time = -1;
647 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */
648 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60;
649 else /* Time is in seconds */
650 app->ap_batt_time = sc->bios.r.edx;
651
652 return 0;
653 }
654
655
656 /* get APM information */
657 static int
658 apm_get_info(apm_info_t aip)
659 {
660 struct apm_softc *sc = &apm_softc;
661 struct apm_pwstatus aps;
662
663 bzero(&aps, sizeof(aps));
664 aps.ap_device = PMDV_ALLDEV;
665 if (apm_get_pwstatus(&aps))
666 return 1;
667
668 aip->ai_infoversion = 1;
669 aip->ai_acline = aps.ap_acline;
670 aip->ai_batt_stat = aps.ap_batt_stat;
671 aip->ai_batt_life = aps.ap_batt_life;
672 aip->ai_batt_time = aps.ap_batt_time;
673 aip->ai_major = (u_int)sc->majorversion;
674 aip->ai_minor = (u_int)sc->minorversion;
675 aip->ai_status = (u_int)sc->active;
676
677 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES;
678 sc->bios.r.ebx = 0;
679 sc->bios.r.ecx = 0;
680 sc->bios.r.edx = 0;
681 if (apm_bioscall()) {
682 aip->ai_batteries = 0xffffffff; /* Unknown */
683 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */
684 } else {
685 aip->ai_batteries = sc->bios.r.ebx & 0xff;
686 aip->ai_capabilities = sc->bios.r.ecx & 0xff;
687 }
688
689 bzero(aip->ai_spare, sizeof aip->ai_spare);
690
691 return 0;
692 }
693
694
695 /* inform APM BIOS that CPU is idle */
696 void
697 apm_cpu_idle(void)
698 {
699 struct apm_softc *sc = &apm_softc;
700
701 if (sc->active) {
702
703 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE;
704 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
705 (void) apm_bioscall();
706 }
707 /*
708 * Some APM implementation halts CPU in BIOS, whenever
709 * "CPU-idle" function are invoked, but swtch() of
710 * FreeBSD halts CPU, therefore, CPU is halted twice
711 * in the sched loop. It makes the interrupt latency
712 * terribly long and be able to cause a serious problem
713 * in interrupt processing. We prevent it by removing
714 * "hlt" operation from swtch() and managed it under
715 * APM driver.
716 */
717 if (!sc->active || sc->always_halt_cpu)
718 halt(); /* wait for interrupt */
719 }
720
721 /* inform APM BIOS that CPU is busy */
722 void
723 apm_cpu_busy(void)
724 {
725 struct apm_softc *sc = &apm_softc;
726
727 /*
728 * The APM specification says this is only necessary if your BIOS
729 * slows down the processor in the idle task, otherwise it's not
730 * necessary.
731 */
732 if (sc->slow_idle_cpu && sc->active) {
733
734 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY;
735 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
736 apm_bioscall();
737 }
738 }
739
740
741 /*
742 * APM thread loop.
743 *
744 * This routine wakes up from time to time to deal with delaying the
745 * suspend of the system, or other events.
746 */
747 static void
748 apm_event_thread(void *arg)
749 {
750 struct apm_softc *sc = &apm_softc;
751
752 sc->running = 1;
753 while (sc->active) {
754 if (apm_op_inprog)
755 apm_lastreq_notify();
756 if (sc->standbys && sc->standby_countdown-- <= 0)
757 apm_do_standby();
758 if (sc->suspends && sc->suspend_countdown-- <= 0)
759 apm_do_suspend();
760 if (!sc->bios_busy)
761 apm_processevent();
762 mtx_lock(&sc->mtx);
763 cv_timedwait(&sc->cv, &sc->mtx, 10 * hz / 9);
764 mtx_unlock(&sc->mtx);
765 }
766 sc->running = 0;
767 kproc_exit(0);
768 }
769
770 /* enable APM BIOS */
771 static void
772 apm_event_enable(void)
773 {
774 struct apm_softc *sc = &apm_softc;
775
776 APM_DPRINT("called apm_event_enable()\n");
777
778 if (sc == NULL || sc->initialized == 0)
779 return;
780
781 /* Start the thread */
782 sc->active = 1;
783 if (kproc_create(apm_event_thread, sc, &sc->event_thread, 0, 0,
784 "apm worker"))
785 panic("Cannot create apm worker thread");
786
787 return;
788 }
789
790 /* disable APM BIOS */
791 static void
792 apm_event_disable(void)
793 {
794 struct apm_softc *sc = &apm_softc;
795
796 APM_DPRINT("called apm_event_disable()\n");
797
798 if (sc == NULL || sc->initialized == 0)
799 return;
800
801 mtx_lock(&sc->mtx);
802 sc->active = 0;
803 while (sc->running) {
804 cv_broadcast(&sc->cv);
805 msleep(sc->event_thread, &sc->mtx, PWAIT, "apmdie", 0);
806 }
807 mtx_unlock(&sc->mtx);
808 sc->event_thread = NULL;
809 return;
810 }
811
812 /* halt CPU in scheduling loop */
813 static void
814 apm_halt_cpu(void)
815 {
816 struct apm_softc *sc = &apm_softc;
817
818 if (sc == NULL || sc->initialized == 0)
819 return;
820
821 sc->always_halt_cpu = 1;
822
823 return;
824 }
825
826 /* don't halt CPU in scheduling loop */
827 static void
828 apm_not_halt_cpu(void)
829 {
830 struct apm_softc *sc = &apm_softc;
831
832 if (sc == NULL || sc->initialized == 0)
833 return;
834
835 sc->always_halt_cpu = 0;
836
837 return;
838 }
839
840 /* device driver definitions */
841
842 /*
843 * Module event
844 */
845
846 static int
847 apm_modevent(struct module *mod, int event, void *junk)
848 {
849
850 switch (event) {
851 case MOD_LOAD:
852 if (!cold)
853 return (EPERM);
854 break;
855 case MOD_UNLOAD:
856 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM)
857 return (EBUSY);
858 break;
859 default:
860 break;
861 }
862
863 return (0);
864 }
865
866 /*
867 * Create "connection point"
868 */
869 static void
870 apm_identify(driver_t *driver, device_t parent)
871 {
872 device_t child;
873
874 if (!cold) {
875 printf("Don't load this driver from userland!!\n");
876 return;
877 }
878
879 if (resource_disabled("apm", 0))
880 return;
881
882 child = BUS_ADD_CHILD(parent, 0, "apm", 0);
883 if (child == NULL)
884 panic("apm_identify");
885 }
886
887 /*
888 * probe for APM BIOS
889 */
890 static int
891 apm_probe(device_t dev)
892 {
893 #define APM_KERNBASE KERNBASE
894 struct vm86frame vmf;
895 struct apm_softc *sc = &apm_softc;
896 #ifdef PC98
897 int rid;
898 #endif
899
900 device_set_desc(dev, "APM BIOS");
901 if (device_get_unit(dev) > 0) {
902 printf("apm: Only one APM driver supported.\n");
903 return ENXIO;
904 }
905
906 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
907 power_pm_get_type() != POWER_PM_TYPE_APM) {
908 printf("apm: Other PM system enabled.\n");
909 return ENXIO;
910 }
911
912 bzero(&vmf, sizeof(struct vm86frame)); /* safety */
913 bzero(&apm_softc, sizeof(apm_softc));
914 vmf.vmf_ah = APM_BIOS;
915 vmf.vmf_al = APM_INSTCHECK;
916 vmf.vmf_bx = 0;
917 if (vm86_intcall(APM_INT, &vmf))
918 return ENXIO; /* APM not found */
919 if (vmf.vmf_bx != 0x504d) {
920 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
921 return ENXIO;
922 }
923 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
924 printf("apm: protected mode connections are not supported\n");
925 return ENXIO;
926 }
927
928 apm_version = vmf.vmf_ax;
929 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
930 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
931 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
932
933 vmf.vmf_ah = APM_BIOS;
934 vmf.vmf_al = APM_DISCONNECT;
935 vmf.vmf_bx = 0;
936 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */
937
938 #ifdef PC98
939 /* PC98 have bogos APM 32bit BIOS */
940 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0)
941 return ENXIO;
942 rid = 0;
943 bus_set_resource(dev, SYS_RES_IOPORT, rid,
944 APM_NECSMM_PORT, APM_NECSMM_PORTSZ);
945 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
946 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
947 if (sc->sc_res == NULL) {
948 printf("apm: cannot open NEC smm device\n");
949 return ENXIO;
950 }
951 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res);
952
953 vmf.vmf_ah = APM_BIOS;
954 vmf.vmf_al = APM_PROT32CONNECT;
955 vmf.vmf_bx = 0;
956 if (vm86_intcall(APM_INT, &vmf)) {
957 printf("apm: 32-bit connection error.\n");
958 return (ENXIO);
959 }
960
961 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
962 sc->bios.seg.code32.limit = 0xffff;
963 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
964 sc->bios.seg.code16.limit = 0xffff;
965 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
966 sc->bios.seg.data.limit = 0xffff;
967 sc->bios.entry = vmf.vmf_ebx;
968 sc->connectmode = APM_PROT32CONNECT;
969 #else
970 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
971 vmf.vmf_ah = APM_BIOS;
972 vmf.vmf_al = APM_PROT32CONNECT;
973 vmf.vmf_bx = 0;
974 if (vm86_intcall(APM_INT, &vmf)) {
975 printf("apm: 32-bit connection error.\n");
976 return (ENXIO);
977 }
978 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
979 sc->bios.seg.code32.limit = 0xffff;
980 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
981 sc->bios.seg.code16.limit = 0xffff;
982 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
983 sc->bios.seg.data.limit = 0xffff;
984 sc->bios.entry = vmf.vmf_ebx;
985 sc->connectmode = APM_PROT32CONNECT;
986 } else {
987 /* use 16-bit connection */
988 vmf.vmf_ah = APM_BIOS;
989 vmf.vmf_al = APM_PROT16CONNECT;
990 vmf.vmf_bx = 0;
991 if (vm86_intcall(APM_INT, &vmf)) {
992 printf("apm: 16-bit connection error.\n");
993 return (ENXIO);
994 }
995 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
996 sc->bios.seg.code16.limit = 0xffff;
997 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
998 sc->bios.seg.data.limit = 0xffff;
999 sc->bios.entry = vmf.vmf_bx;
1000 sc->connectmode = APM_PROT16CONNECT;
1001 }
1002 #endif
1003 return(0);
1004 }
1005
1006
1007 /*
1008 * return 0 if the user will notice and handle the event,
1009 * return 1 if the kernel driver should do so.
1010 */
1011 static int
1012 apm_record_event(struct apm_softc *sc, u_int event_type)
1013 {
1014 struct apm_event_info *evp;
1015
1016 if ((sc->sc_flags & SCFLAG_OPEN) == 0)
1017 return 1; /* no user waiting */
1018 if (sc->event_count == APM_NEVENTS)
1019 return 1; /* overflow */
1020 if (sc->event_filter[event_type] == 0)
1021 return 1; /* not registered */
1022 evp = &sc->event_list[sc->event_ptr];
1023 sc->event_count++;
1024 sc->event_ptr++;
1025 sc->event_ptr %= APM_NEVENTS;
1026 evp->type = event_type;
1027 evp->index = ++apm_evindex;
1028 selwakeuppri(&sc->sc_rsel, PZERO);
1029 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
1030 }
1031
1032 /* Power profile */
1033 static void
1034 apm_power_profile(struct apm_softc *sc)
1035 {
1036 int state;
1037 struct apm_info info;
1038 static int apm_acline = 0;
1039
1040 if (apm_get_info(&info))
1041 return;
1042
1043 if (apm_acline != info.ai_acline) {
1044 apm_acline = info.ai_acline;
1045 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY;
1046 power_profile_set_state(state);
1047 }
1048 }
1049
1050 /* Process APM event */
1051 static void
1052 apm_processevent(void)
1053 {
1054 int apm_event;
1055 struct apm_softc *sc = &apm_softc;
1056
1057 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
1058 APM_DPRINT("Received APM Event: " #symbol "\n");
1059
1060 do {
1061 apm_event = apm_getevent();
1062 switch (apm_event) {
1063 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
1064 if (apm_op_inprog == 0) {
1065 apm_op_inprog++;
1066 if (apm_record_event(sc, apm_event)) {
1067 apm_suspend(PMST_STANDBY);
1068 }
1069 }
1070 break;
1071 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ);
1072 if (apm_op_inprog == 0) {
1073 apm_op_inprog++;
1074 if (apm_record_event(sc, apm_event)) {
1075 apm_suspend(PMST_STANDBY);
1076 }
1077 }
1078 break;
1079 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
1080 apm_lastreq_notify();
1081 if (apm_op_inprog == 0) {
1082 apm_op_inprog++;
1083 if (apm_record_event(sc, apm_event)) {
1084 apm_do_suspend();
1085 }
1086 }
1087 return; /* XXX skip the rest */
1088 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
1089 apm_lastreq_notify();
1090 if (apm_op_inprog == 0) {
1091 apm_op_inprog++;
1092 if (apm_record_event(sc, apm_event)) {
1093 apm_do_suspend();
1094 }
1095 }
1096 return; /* XXX skip the rest */
1097 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
1098 apm_do_suspend();
1099 break;
1100 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
1101 apm_record_event(sc, apm_event);
1102 apm_resume();
1103 break;
1104 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
1105 apm_record_event(sc, apm_event);
1106 apm_resume();
1107 break;
1108 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
1109 apm_record_event(sc, apm_event);
1110 break;
1111 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
1112 if (apm_record_event(sc, apm_event)) {
1113 apm_battery_low();
1114 apm_suspend(PMST_SUSPEND);
1115 }
1116 break;
1117 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
1118 apm_record_event(sc, apm_event);
1119 apm_power_profile(sc);
1120 break;
1121 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
1122 apm_record_event(sc, apm_event);
1123 inittodr(0); /* adjust time to RTC */
1124 break;
1125 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
1126 apm_record_event(sc, apm_event);
1127 apm_power_profile(sc);
1128 break;
1129 case PMEV_NOEVENT:
1130 break;
1131 default:
1132 printf("Unknown Original APM Event 0x%x\n", apm_event);
1133 break;
1134 }
1135 } while (apm_event != PMEV_NOEVENT);
1136 #ifdef PC98
1137 apm_disable_smm(sc);
1138 #endif
1139 }
1140
1141 /*
1142 * Attach APM:
1143 *
1144 * Initialize APM driver
1145 */
1146
1147 static int
1148 apm_attach(device_t dev)
1149 {
1150 struct apm_softc *sc = &apm_softc;
1151 int drv_version;
1152 #ifdef PC98
1153 int rid;
1154 #endif
1155 mtx_init(&sc->mtx, device_get_nameunit(dev), "apm", MTX_DEF);
1156 cv_init(&sc->cv, "cbb cv");
1157
1158 #ifndef PC98
1159 if (device_get_flags(dev) & 0x20)
1160 atrtcclock_disable = 1;
1161 #endif
1162
1163 sc->initialized = 0;
1164
1165 /* Must be externally enabled */
1166 sc->active = 0;
1167
1168 /* Always call HLT in idle loop */
1169 sc->always_halt_cpu = 1;
1170
1171 getenv_int("debug.apm_debug", &apm_debug);
1172
1173 /* print bootstrap messages */
1174 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version);
1175 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n",
1176 sc->bios.seg.code16.base, sc->bios.seg.data.base);
1177 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
1178 sc->bios.entry, is_enabled(sc->slow_idle_cpu),
1179 is_enabled(!sc->disabled));
1180 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n",
1181 sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
1182
1183 #ifdef PC98
1184 rid = 0;
1185 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
1186 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
1187 if (sc->sc_res == NULL)
1188 panic("%s: counldn't map I/O ports", device_get_name(dev));
1189 sc->sc_iot = rman_get_bustag(sc->sc_res);
1190 sc->sc_ioh = rman_get_bushandle(sc->sc_res);
1191
1192 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110)
1193 apm_necsmm_addr = APM_NECSMM_PORT;
1194 else
1195 apm_necsmm_addr = 0;
1196 apm_necsmm_mask = ~APM_NECSMM_EN;
1197 #endif /* PC98 */
1198
1199 /*
1200 * In one test, apm bios version was 1.02; an attempt to register
1201 * a 1.04 driver resulted in a 1.00 connection! Registering a
1202 * 1.02 driver resulted in a 1.02 connection.
1203 */
1204 drv_version = apm_version > 0x102 ? 0x102 : apm_version;
1205 for (; drv_version > 0x100; drv_version--)
1206 if (apm_driver_version(drv_version) == 0)
1207 break;
1208 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 +
1209 ((drv_version & 0x000f) >> 0);
1210 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
1211 ((apm_version & 0x0f00) >> 8);
1212
1213 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
1214
1215 if (sc->intversion >= INTVERSION(1, 1))
1216 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
1217 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n",
1218 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
1219 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
1220 sc->majorversion, sc->minorversion);
1221
1222
1223 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
1224 /* enable power management */
1225 if (sc->disabled) {
1226 if (apm_enable_disable_pm(1)) {
1227 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n",
1228 (sc->bios.r.eax >> 8) & 0xff);
1229 }
1230 }
1231
1232 /* engage power managment (APM 1.1 or later) */
1233 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
1234 if (apm_engage_disengage_pm(1)) {
1235 APM_DPRINT("apm: *Warning* engage function failed err=[%x]",
1236 (sc->bios.r.eax >> 8) & 0xff);
1237 APM_DPRINT(" (Docked or using external power?).\n");
1238 }
1239 }
1240
1241 /* Power the system off using APM */
1242 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL,
1243 SHUTDOWN_PRI_LAST);
1244
1245 /* Register APM again to pass the correct argument of pm_func. */
1246 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc);
1247
1248 sc->initialized = 1;
1249 sc->suspending = 0;
1250 sc->running = 0;
1251
1252 make_dev(&apm_cdevsw, 0, 0, 5, 0664, "apm");
1253 make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl");
1254 return 0;
1255 }
1256
1257 static int
1258 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td)
1259 {
1260 struct apm_softc *sc = &apm_softc;
1261 int ctl = APMDEV(dev);
1262
1263 if (sc == NULL || sc->initialized == 0)
1264 return (ENXIO);
1265
1266 switch (ctl) {
1267 case APMDEV_CTL:
1268 if (!(flag & FWRITE))
1269 return EINVAL;
1270 if (sc->sc_flags & SCFLAG_OCTL)
1271 return EBUSY;
1272 sc->sc_flags |= SCFLAG_OCTL;
1273 bzero(sc->event_filter, sizeof sc->event_filter);
1274 break;
1275 case APMDEV_NORMAL:
1276 sc->sc_flags |= SCFLAG_ONORMAL;
1277 break;
1278 default:
1279 return ENXIO;
1280 break;
1281 }
1282 return 0;
1283 }
1284
1285 static int
1286 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td)
1287 {
1288 struct apm_softc *sc = &apm_softc;
1289 int ctl = APMDEV(dev);
1290
1291 switch (ctl) {
1292 case APMDEV_CTL:
1293 apm_lastreq_rejected();
1294 sc->sc_flags &= ~SCFLAG_OCTL;
1295 bzero(sc->event_filter, sizeof sc->event_filter);
1296 break;
1297 case APMDEV_NORMAL:
1298 sc->sc_flags &= ~SCFLAG_ONORMAL;
1299 break;
1300 }
1301 if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
1302 sc->event_count = 0;
1303 sc->event_ptr = 0;
1304 }
1305 return 0;
1306 }
1307
1308 static int
1309 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1310 {
1311 struct apm_softc *sc = &apm_softc;
1312 struct apm_bios_arg *args;
1313 int error = 0;
1314 int ret;
1315 int newstate;
1316
1317 if (sc == NULL || sc->initialized == 0)
1318 return (ENXIO);
1319
1320 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd);
1321 switch (cmd) {
1322 case APMIO_SUSPEND:
1323 if (!(flag & FWRITE))
1324 return (EPERM);
1325 if (sc->active)
1326 apm_suspend(PMST_SUSPEND);
1327 else
1328 error = EINVAL;
1329 break;
1330
1331 case APMIO_STANDBY:
1332 if (!(flag & FWRITE))
1333 return (EPERM);
1334 if (sc->active)
1335 apm_suspend(PMST_STANDBY);
1336 else
1337 error = EINVAL;
1338 break;
1339
1340 case APMIO_GETINFO_OLD:
1341 {
1342 struct apm_info info;
1343 apm_info_old_t aiop;
1344
1345 if (apm_get_info(&info))
1346 error = ENXIO;
1347 aiop = (apm_info_old_t)addr;
1348 aiop->ai_major = info.ai_major;
1349 aiop->ai_minor = info.ai_minor;
1350 aiop->ai_acline = info.ai_acline;
1351 aiop->ai_batt_stat = info.ai_batt_stat;
1352 aiop->ai_batt_life = info.ai_batt_life;
1353 aiop->ai_status = info.ai_status;
1354 }
1355 break;
1356 case APMIO_GETINFO:
1357 if (apm_get_info((apm_info_t)addr))
1358 error = ENXIO;
1359 break;
1360 case APMIO_GETPWSTATUS:
1361 if (apm_get_pwstatus((apm_pwstatus_t)addr))
1362 error = ENXIO;
1363 break;
1364 case APMIO_ENABLE:
1365 if (!(flag & FWRITE))
1366 return (EPERM);
1367 apm_event_enable();
1368 break;
1369 case APMIO_DISABLE:
1370 if (!(flag & FWRITE))
1371 return (EPERM);
1372 apm_event_disable();
1373 break;
1374 case APMIO_HALTCPU:
1375 if (!(flag & FWRITE))
1376 return (EPERM);
1377 apm_halt_cpu();
1378 break;
1379 case APMIO_NOTHALTCPU:
1380 if (!(flag & FWRITE))
1381 return (EPERM);
1382 apm_not_halt_cpu();
1383 break;
1384 case APMIO_DISPLAY:
1385 if (!(flag & FWRITE))
1386 return (EPERM);
1387 newstate = *(int *)addr;
1388 if (apm_display(newstate))
1389 error = ENXIO;
1390 break;
1391 case APMIO_BIOS:
1392 if (!(flag & FWRITE))
1393 return (EPERM);
1394 /* XXX compatibility with the old interface */
1395 args = (struct apm_bios_arg *)addr;
1396 sc->bios.r.eax = args->eax;
1397 sc->bios.r.ebx = args->ebx;
1398 sc->bios.r.ecx = args->ecx;
1399 sc->bios.r.edx = args->edx;
1400 sc->bios.r.esi = args->esi;
1401 sc->bios.r.edi = args->edi;
1402 if ((ret = apm_bioscall())) {
1403 /*
1404 * Return code 1 means bios call was unsuccessful.
1405 * Error code is stored in %ah.
1406 * Return code -1 means bios call was unsupported
1407 * in the APM BIOS version.
1408 */
1409 if (ret == -1) {
1410 error = EINVAL;
1411 }
1412 } else {
1413 /*
1414 * Return code 0 means bios call was successful.
1415 * We need only %al and can discard %ah.
1416 */
1417 sc->bios.r.eax &= 0xff;
1418 }
1419 args->eax = sc->bios.r.eax;
1420 args->ebx = sc->bios.r.ebx;
1421 args->ecx = sc->bios.r.ecx;
1422 args->edx = sc->bios.r.edx;
1423 args->esi = sc->bios.r.esi;
1424 args->edi = sc->bios.r.edi;
1425 break;
1426 default:
1427 error = EINVAL;
1428 break;
1429 }
1430
1431 /* for /dev/apmctl */
1432 if (APMDEV(dev) == APMDEV_CTL) {
1433 struct apm_event_info *evp;
1434 int i;
1435
1436 error = 0;
1437 switch (cmd) {
1438 case APMIO_NEXTEVENT:
1439 if (!sc->event_count) {
1440 error = EAGAIN;
1441 } else {
1442 evp = (struct apm_event_info *)addr;
1443 i = sc->event_ptr + APM_NEVENTS - sc->event_count;
1444 i %= APM_NEVENTS;
1445 *evp = sc->event_list[i];
1446 sc->event_count--;
1447 }
1448 break;
1449 case APMIO_REJECTLASTREQ:
1450 if (apm_lastreq_rejected()) {
1451 error = EINVAL;
1452 }
1453 break;
1454 default:
1455 error = EINVAL;
1456 break;
1457 }
1458 }
1459
1460 return error;
1461 }
1462
1463 static int
1464 apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
1465 {
1466 struct apm_softc *sc = &apm_softc;
1467 u_int event_type;
1468 int error;
1469 u_char enabled;
1470
1471 if (APMDEV(dev) != APMDEV_CTL)
1472 return(ENODEV);
1473 if (uio->uio_resid != sizeof(u_int))
1474 return(E2BIG);
1475
1476 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
1477 return(error);
1478
1479 if (event_type < 0 || event_type >= APM_NPMEV)
1480 return(EINVAL);
1481
1482 if (sc->event_filter[event_type] == 0) {
1483 enabled = 1;
1484 } else {
1485 enabled = 0;
1486 }
1487 sc->event_filter[event_type] = enabled;
1488 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
1489
1490 return uio->uio_resid;
1491 }
1492
1493 static int
1494 apmpoll(struct cdev *dev, int events, struct thread *td)
1495 {
1496 struct apm_softc *sc = &apm_softc;
1497 int revents = 0;
1498
1499 if (events & (POLLIN | POLLRDNORM)) {
1500 if (sc->event_count) {
1501 revents |= events & (POLLIN | POLLRDNORM);
1502 } else {
1503 selrecord(td, &sc->sc_rsel);
1504 }
1505 }
1506
1507 return (revents);
1508 }
1509
1510 static device_method_t apm_methods[] = {
1511 /* Device interface */
1512 DEVMETHOD(device_identify, apm_identify),
1513 DEVMETHOD(device_probe, apm_probe),
1514 DEVMETHOD(device_attach, apm_attach),
1515
1516 { 0, 0 }
1517 };
1518
1519 static driver_t apm_driver = {
1520 "apm",
1521 apm_methods,
1522 1, /* no softc (XXX) */
1523 };
1524
1525 static devclass_t apm_devclass;
1526
1527 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0);
1528 MODULE_VERSION(apm, 1);
1529
1530 static int
1531 apm_pm_func(u_long cmd, void *arg, ...)
1532 {
1533 int state, apm_state;
1534 int error;
1535 va_list ap;
1536
1537 error = 0;
1538 switch (cmd) {
1539 case POWER_CMD_SUSPEND:
1540 va_start(ap, arg);
1541 state = va_arg(ap, int);
1542 va_end(ap);
1543
1544 switch (state) {
1545 case POWER_SLEEP_STATE_STANDBY:
1546 apm_state = PMST_STANDBY;
1547 break;
1548 case POWER_SLEEP_STATE_SUSPEND:
1549 case POWER_SLEEP_STATE_HIBERNATE:
1550 apm_state = PMST_SUSPEND;
1551 break;
1552 default:
1553 error = EINVAL;
1554 goto out;
1555 }
1556
1557 apm_suspend(apm_state);
1558 break;
1559
1560 default:
1561 error = EINVAL;
1562 goto out;
1563 }
1564
1565 out:
1566 return (error);
1567 }
1568
1569 static void
1570 apm_pm_register(void *arg)
1571 {
1572
1573 if (!resource_disabled("apm", 0))
1574 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL);
1575 }
1576
1577 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);
Cache object: ea866f4974689f2661b5ca424e4e11c5
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