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 * $Id: apm.c,v 1.67 1997/12/23 16:32:35 nate Exp $
19 */
20
21#include "opt_devfs.h"
22
23#include <sys/param.h>
24#include <sys/conf.h>
25#include <sys/kernel.h>
26#ifdef DEVFS
27#include <sys/devfsext.h>
28#endif /*DEVFS*/
29#include <sys/systm.h>
30#include <sys/time.h>
31#include <i386/isa/isa_device.h>
32#include <machine/apm_bios.h>
33#include <machine/segments.h>
34#include <machine/clock.h>
35#include <vm/vm.h>
36#include <vm/vm_param.h>
37#include <vm/pmap.h>
38#include <sys/syslog.h>
39#include <i386/apm/apm_setup.h>
40
41static int apm_display __P((int newstate));
42static int apm_int __P((u_long *eax, u_long *ebx, u_long *ecx, u_long *edx));
43static void apm_resume __P((void));
44
45/* static data */
46struct apm_softc {
47 int initialized, active;
48 int always_halt_cpu, slow_idle_cpu;
49 int disabled, disengaged;
50 u_int minorversion, majorversion;
51 u_int cs32_base, cs16_base, ds_base;
52 u_int cs_limit, ds_limit;
53 u_int cs_entry;
54 u_int intversion;
55 struct apmhook sc_suspend;
56 struct apmhook sc_resume;
57#ifdef DEVFS
58 void *sc_devfs_token;
59#endif
60};
61
62static struct apm_softc apm_softc;
63static struct apmhook *hook[NAPM_HOOK]; /* XXX */
64
65#define is_enabled(foo) ((foo) ? "enabled" : "disabled")
66
67/* Map version number to integer (keeps ordering of version numbers) */
68#define INTVERSION(major, minor) ((major)*100 + (minor))
69
70static struct callout_handle apm_timeout_ch =
71 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch);
72
73static timeout_t apm_timeout;
74static d_open_t apmopen;
75static d_close_t apmclose;
76static d_ioctl_t apmioctl;
77
78#define CDEV_MAJOR 39
79static struct cdevsw apm_cdevsw =
80 { apmopen, apmclose, noread, nowrite, /*39*/
81 apmioctl, nostop, nullreset, nodevtotty,/* APM */
82 seltrue, nommap, NULL , "apm" ,NULL, -1};
83
84/* setup APM GDT discriptors */
85static void
86setup_apm_gdt(u_int code32_base, u_int code16_base, u_int data_base, u_int code_limit, u_int data_limit)
87{
88 /* setup 32bit code segment */
89 gdt_segs[GAPMCODE32_SEL].ssd_base = code32_base;
90 gdt_segs[GAPMCODE32_SEL].ssd_limit = code_limit;
91
92 /* setup 16bit code segment */
93 gdt_segs[GAPMCODE16_SEL].ssd_base = code16_base;
94 gdt_segs[GAPMCODE16_SEL].ssd_limit = code_limit;
95
96 /* setup data segment */
97 gdt_segs[GAPMDATA_SEL ].ssd_base = data_base;
98 gdt_segs[GAPMDATA_SEL ].ssd_limit = data_limit;
99
100 /* reflect these changes on physical GDT */
101 ssdtosd(gdt_segs + GAPMCODE32_SEL, &gdt[GAPMCODE32_SEL].sd);
102 ssdtosd(gdt_segs + GAPMCODE16_SEL, &gdt[GAPMCODE16_SEL].sd);
103 ssdtosd(gdt_segs + GAPMDATA_SEL , &gdt[GAPMDATA_SEL ].sd);
104}
105
106/* 48bit far pointer */
107struct addr48 {
108 u_long offset;
109 u_short segment;
110} apm_addr;
111
112static int apm_errno;
113
114static int
115apm_int(u_long *eax, u_long *ebx, u_long *ecx, u_long *edx)
116{
117 struct apm_bios_arg apa;
118 int cf;
119
120 apa.eax = *eax;
121 apa.ebx = *ebx;
122 apa.ecx = *ecx;
123 apa.edx = *edx;
124 cf = apm_bios_call(&apa);
125 *eax = apa.eax;
126 *ebx = apa.ebx;
127 *ecx = apa.ecx;
128 *edx = apa.edx;
129 apm_errno = ((*eax) >> 8) & 0xff;
130 return cf;
131}
132
133
134/* enable/disable power management */
135static int
136apm_enable_disable_pm(int enable)
137{
138 struct apm_softc *sc = &apm_softc;
139
140 u_long eax, ebx, ecx, edx;
141
142 eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
143
144 if (sc->intversion >= INTVERSION(1, 1))
145 ebx = PMDV_ALLDEV;
146 else
147 ebx = 0xffff; /* APM version 1.0 only */
148 ecx = enable;
149 edx = 0;
150 return apm_int(&eax, &ebx, &ecx, &edx);
151}
152
153static void
154apm_driver_version(int version)
155{
156 u_long eax, ebx, ecx, edx;
157
158 /* First try APM 1.2 */
159 eax = (APM_BIOS << 8) | APM_DRVVERSION;
160 ebx = 0x0;
161 ecx = version;
162 edx = 0;
163 if(!apm_int(&eax, &ebx, &ecx, &edx))
164 apm_version = eax & 0xffff;
165}
166
167/* engage/disengage power management (APM 1.1 or later) */
168static int
169apm_engage_disengage_pm(int engage)
170{
171 u_long eax, ebx, ecx, edx;
172
173 eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
174 ebx = PMDV_ALLDEV;
175 ecx = engage;
176 edx = 0;
177 return(apm_int(&eax, &ebx, &ecx, &edx));
178}
179
180/* get PM event */
181static u_int
182apm_getevent(void)
183{
184 u_long eax, ebx, ecx, edx;
185
186 eax = (APM_BIOS << 8) | APM_GETPMEVENT;
187
188 ebx = 0;
189 ecx = 0;
190 edx = 0;
191 if (apm_int(&eax, &ebx, &ecx, &edx))
192 return PMEV_NOEVENT;
193
194 return ebx & 0xffff;
195}
196
197/* suspend entire system */
198static int
199apm_suspend_system(void)
200{
201 u_long eax, ebx, ecx, edx;
202
203 eax = (APM_BIOS << 8) | APM_SETPWSTATE;
204 ebx = PMDV_ALLDEV;
205 ecx = PMST_SUSPEND;
206 edx = 0;
207
208 if (apm_int(&eax, &ebx, &ecx, &edx)) {
209 printf("Entire system suspend failure: errcode = %ld\n",
210 0xff & (eax >> 8));
211 return 1;
212 }
213 return 0;
214}
215
216/* Display control */
217/*
218 * Experimental implementation: My laptop machine can't handle this function
219 * If your laptop can control the display via APM, please inform me.
220 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
221 */
222static int
223apm_display(int newstate)
224{
225 u_long eax, ebx, ecx, edx;
226
227 eax = (APM_BIOS << 8) | APM_SETPWSTATE;
228 ebx = PMDV_DISP0;
229 ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
230 edx = 0;
231 if (apm_int(&eax, &ebx, &ecx, &edx)) {
232 printf("Display off failure: errcode = %ld\n",
233 0xff & (eax >> 8));
234 return 1;
235 }
236 return 0;
237}
238
239/*
240 * Turn off the entire system.
241 */
242void
243apm_power_off(void)
244{
245 u_long eax, ebx, ecx, edx;
246
247 if (!apm_softc.active)
248 return;
249 eax = (APM_BIOS << 8) | APM_SETPWSTATE;
250 ebx = PMDV_ALLDEV;
251 ecx = PMST_OFF;
252 edx = 0;
253 apm_int(&eax, &ebx, &ecx, &edx);
254}
255
256/* APM Battery low handler */
257static void
258apm_battery_low(void)
259{
260 printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
261}
262
263/* APM hook manager */
264static struct apmhook *
265apm_add_hook(struct apmhook **list, struct apmhook *ah)
266{
267 int s;
268 struct apmhook *p, *prev;
269
270#ifdef APM_DEBUG
271 printf("Add hook \"%s\"\n", ah->ah_name);
272#endif
273
274 s = splhigh();
275 if (ah == NULL)
276 panic("illegal apm_hook!");
277 prev = NULL;
278 for (p = *list; p != NULL; prev = p, p = p->ah_next)
279 if (p->ah_order > ah->ah_order)
280 break;
281
282 if (prev == NULL) {
283 ah->ah_next = *list;
284 *list = ah;
285 } else {
286 ah->ah_next = prev->ah_next;
287 prev->ah_next = ah;
288 }
289 splx(s);
290 return ah;
291}
292
293static void
294apm_del_hook(struct apmhook **list, struct apmhook *ah)
295{
296 int s;
297 struct apmhook *p, *prev;
298
299 s = splhigh();
300 prev = NULL;
301 for (p = *list; p != NULL; prev = p, p = p->ah_next)
302 if (p == ah)
303 goto deleteit;
304 panic("Tried to delete unregistered apm_hook.");
305 goto nosuchnode;
306deleteit:
307 if (prev != NULL)
308 prev->ah_next = p->ah_next;
309 else
310 *list = p->ah_next;
311nosuchnode:
312 splx(s);
313}
314
315
316/* APM driver calls some functions automatically */
317static void
318apm_execute_hook(struct apmhook *list)
319{
320 struct apmhook *p;
321
322 for (p = list; p != NULL; p = p->ah_next) {
323#ifdef APM_DEBUG
324 printf("Execute APM hook \"%s.\"\n", p->ah_name);
325#endif
326 if ((*(p->ah_fun))(p->ah_arg))
327 printf("Warning: APM hook \"%s\" failed", p->ah_name);
328 }
329}
330
331
332/* establish an apm hook */
333struct apmhook *
334apm_hook_establish(int apmh, struct apmhook *ah)
335{
336 if (apmh < 0 || apmh >= NAPM_HOOK)
337 return NULL;
338
339 return apm_add_hook(&hook[apmh], ah);
340}
341
342/* disestablish an apm hook */
343void
344apm_hook_disestablish(int apmh, struct apmhook *ah)
345{
346 if (apmh < 0 || apmh >= NAPM_HOOK)
347 return;
348
349 apm_del_hook(&hook[apmh], ah);
350}
351
352
353static struct timeval suspend_time;
354static struct timeval diff_time;
355
356static int
357apm_default_resume(void *arg)
358{
359 int pl;
360 u_int second, minute, hour;
361 struct timeval resume_time, tmp_time;
362
363 /* modified for adjkerntz */
364 pl = splsoftclock();
365 inittodr(0); /* adjust time to RTC */
366 microtime(&resume_time);
367 tmp_time = time; /* because 'time' is volatile */
368 timevaladd(&tmp_time, &diff_time);
369 time = tmp_time;
370#ifdef APM_FIXUP_CALLTODO
371 /* Calculate the delta time suspended */
372 timevalsub(&resume_time, &suspend_time);
373 /* Fixup the calltodo list with the delta time. */
374 adjust_timeout_calltodo(&resume_time);
375#endif /* APM_FIXUP_CALLTODOK */
376 splx(pl);
377#ifndef APM_FIXUP_CALLTODO
378 second = resume_time.tv_sec - suspend_time.tv_sec;
379#else /* APM_FIXUP_CALLTODO */
380 /*
381 * We've already calculated resume_time to be the delta between
382 * the suspend and the resume.
383 */
384 second = resume_time.tv_sec;
385#endif /* APM_FIXUP_CALLTODO */
386 hour = second / 3600;
387 second %= 3600;
388 minute = second / 60;
389 second %= 60;
390 log(LOG_NOTICE, "resumed from suspended mode (slept %02d:%02d:%02d)\n",
391 hour, minute, second);
392 return 0;
393}
394
395static int
396apm_default_suspend(void *arg)
397{
398 int pl;
399
400 pl = splsoftclock();
401 microtime(&diff_time);
402 inittodr(0);
403 microtime(&suspend_time);
404 timevalsub(&diff_time, &suspend_time);
405 splx(pl);
406 return 0;
407}
408
409static void apm_processevent(void);
410
411/*
412 * Public interface to the suspend/resume:
413 *
414 * Execute suspend and resume hook before and after sleep, respectively.
415 *
416 */
417
418void
419apm_suspend(void)
420{
421 struct apm_softc *sc = &apm_softc;
422
423 if (!sc)
424 return;
425
426 if (sc->initialized) {
427 apm_execute_hook(hook[APM_HOOK_SUSPEND]);
428 if (apm_suspend_system() == 0)
429 apm_processevent();
430 else
431 /* Failure, 'resume' the system again */
432 apm_execute_hook(hook[APM_HOOK_RESUME]);
433 }
434}
435
436void
437apm_resume(void)
438{
439 struct apm_softc *sc = &apm_softc;
440
441 if (!sc)
442 return;
443
444 if (sc->initialized)
445 apm_execute_hook(hook[APM_HOOK_RESUME]);
446}
447
448
449/* get APM information */
450static int
451apm_get_info(apm_info_t aip)
452{
453 struct apm_softc *sc = &apm_softc;
454 u_long eax, ebx, ecx, edx;
455
456 eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
457 ebx = PMDV_ALLDEV;
458 ecx = 0;
459 edx = 0xffff; /* default to unknown battery time */
460
461 if (apm_int(&eax, &ebx, &ecx, &edx))
462 return 1;
463
464 aip->ai_infoversion = 0;
465 aip->ai_acline = (ebx >> 8) & 0xff;
466 aip->ai_batt_stat = ebx & 0xff;
467 aip->ai_batt_life = ecx & 0xff;
468 aip->ai_major = (u_int)sc->majorversion;
469 aip->ai_minor = (u_int)sc->minorversion;
470 aip->ai_status = (u_int)sc->active;
471 edx &= 0xffff;
472 if (edx == 0xffff) /* Time is unknown */
473 aip->ai_batt_time = -1;
474 else if (edx & 0x8000) /* Time is in minutes */
475 aip->ai_batt_time = (edx & 0x7fff) * 60;
476 else /* Time is in seconds */
477 aip->ai_batt_time = edx;
478 bzero(aip->ai_spare, sizeof aip->ai_spare);
479
480 return 0;
481}
482
483
484/* inform APM BIOS that CPU is idle */
485void
486apm_cpu_idle(void)
487{
488 struct apm_softc *sc = &apm_softc;
489
490 if (sc->active) {
491 u_long eax, ebx, ecx, edx;
492
493 eax = (APM_BIOS <<8) | APM_CPUIDLE;
494 edx = ecx = ebx = 0;
495 apm_int(&eax, &ebx, &ecx, &edx);
496 }
497 /*
498 * Some APM implementation halts CPU in BIOS, whenever
499 * "CPU-idle" function are invoked, but swtch() of
500 * FreeBSD halts CPU, therefore, CPU is halted twice
501 * in the sched loop. It makes the interrupt latency
502 * terribly long and be able to cause a serious problem
503 * in interrupt processing. We prevent it by removing
504 * "hlt" operation from swtch() and managed it under
505 * APM driver.
506 */
507 if (!sc->active || sc->always_halt_cpu)
508 __asm("hlt"); /* wait for interrupt */
509}
510
511/* inform APM BIOS that CPU is busy */
512void
513apm_cpu_busy(void)
514{
515 struct apm_softc *sc = &apm_softc;
516
517 /*
518 * The APM specification says this is only necessary if your BIOS
519 * slows down the processor in the idle task, otherwise it's not
520 * necessary.
521 */
522 if (sc->slow_idle_cpu && sc->active) {
523 u_long eax, ebx, ecx, edx;
524
525 eax = (APM_BIOS <<8) | APM_CPUBUSY;
526 edx = ecx = ebx = 0;
527 apm_int(&eax, &ebx, &ecx, &edx);
528 }
529}
530
531
532/*
533 * APM timeout routine:
534 *
535 * This routine is automatically called by timer once per second.
536 */
537
538static void
539apm_timeout(void *dummy)
540{
541 struct apm_softc *sc = &apm_softc;
542
543 apm_processevent();
544 if (sc->active == 1)
545 /* Run slightly more oftan than 1 Hz */
546 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1 );
547}
548
549/* enable APM BIOS */
550static void
551apm_event_enable(void)
552{
553 struct apm_softc *sc = &apm_softc;
554
555#ifdef APM_DEBUG
556 printf("called apm_event_enable()\n");
557#endif
558 if (sc->initialized) {
559 sc->active = 1;
560 apm_timeout(sc);
561 }
562}
563
564/* disable APM BIOS */
565static void
566apm_event_disable(void)
567{
568 struct apm_softc *sc = &apm_softc;
569
570#ifdef APM_DEBUG
571 printf("called apm_event_disable()\n");
572#endif
573 if (sc->initialized) {
574 untimeout(apm_timeout, NULL, apm_timeout_ch);
575 sc->active = 0;
576 }
577}
578
579/* halt CPU in scheduling loop */
580static void
581apm_halt_cpu(void)
582{
583 struct apm_softc *sc = &apm_softc;
584
585 if (sc->initialized)
586 sc->always_halt_cpu = 1;
587}
588
589/* don't halt CPU in scheduling loop */
590static void
591apm_not_halt_cpu(void)
592{
593 struct apm_softc *sc = &apm_softc;
594
595 if (sc->initialized)
596 sc->always_halt_cpu = 0;
597}
598
599/* device driver definitions */
600static int apmprobe (struct isa_device *);
601static int apmattach(struct isa_device *);
602struct isa_driver apmdriver = { apmprobe, apmattach, "apm" };
603
604/*
605 * probe APM (dummy):
606 *
607 * APM probing routine is placed on locore.s and apm_init.S because
608 * this process forces the CPU to turn to real mode or V86 mode.
609 * Current version uses real mode, but in a future version, we want
610 * to use V86 mode in APM initialization.
611 */
612
613static int
614apmprobe(struct isa_device *dvp)
615{
616 bzero(&apm_softc, sizeof(apm_softc));
617
618 if ( dvp->id_unit > 0 ) {
619 printf("apm: Only one APM driver supported.\n");
620 return 0;
621 }
622 switch (apm_version) {
623 case APMINI_CANTFIND:
624 /* silent */
625 return 0;
626 case APMINI_NOT32BIT:
627 printf("apm: 32bit connection is not supported.\n");
628 return 0;
629 case APMINI_CONNECTERR:
630 printf("apm: 32-bit connection error.\n");
631 return 0;
632 }
633 if (dvp->id_flags & 0x20)
634 statclock_disable = 1;
635 return -1;
636}
637
638
639/* Process APM event */
640static void
641apm_processevent(void)
642{
643 int apm_event;
644
645#ifdef APM_DEBUG
646# define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
647 printf("Received APM Event: " #symbol "\n");
648#else
649# define OPMEV_DEBUGMESSAGE(symbol) case symbol:
650#endif
651 do {
652 apm_event = apm_getevent();
653 switch (apm_event) {
654 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
655 apm_suspend();
656 break;
657 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
658 apm_suspend();
659 break;
660 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
661 apm_suspend();
662 break;
663 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
664 apm_suspend();
665 break;
666 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
667 apm_resume();
668 break;
669 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
670 apm_resume();
671 break;
672 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
673 apm_resume();
674 break;
675 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
676 apm_battery_low();
677 apm_suspend();
678 break;
679 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
680 break;
681 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
682 inittodr(0); /* adjust time to RTC */
683 break;
684 case PMEV_NOEVENT:
685 break;
686 default:
687 printf("Unknown Original APM Event 0x%x\n", apm_event);
688 break;
689 }
690 } while (apm_event != PMEV_NOEVENT);
691}
692
693/*
694 * Attach APM:
695 *
696 * Initialize APM driver (APM BIOS itself has been initialized in locore.s)
697 */
698
699static int
700apmattach(struct isa_device *dvp)
701{
702#define APM_KERNBASE KERNBASE
703 struct apm_softc *sc = &apm_softc;
704
705 sc->initialized = 0;
706
707 /* Must be externally enabled */
708 sc->active = 0;
709
710 /* setup APM parameters */
711 sc->cs16_base = (apm_cs16_base << 4) + APM_KERNBASE;
712 sc->cs32_base = (apm_cs32_base << 4) + APM_KERNBASE;
713 sc->ds_base = (apm_ds_base << 4) + APM_KERNBASE;
714 sc->cs_limit = apm_cs_limit;
715 sc->ds_limit = apm_ds_limit;
716 sc->cs_entry = apm_cs_entry;
717
718 /* Always call HLT in idle loop */
719 sc->always_halt_cpu = 1;
720
721 sc->slow_idle_cpu = ((apm_flags & APM_CPUIDLE_SLOW) != 0);
722 sc->disabled = ((apm_flags & APM_DISABLED) != 0);
723 sc->disengaged = ((apm_flags & APM_DISENGAGED) != 0);
724
725 /* print bootstrap messages */
726#ifdef APM_DEBUG
727 printf("apm: APM BIOS version %04x\n", apm_version);
728 printf("apm: Code32 0x%08x, Code16 0x%08x, Data 0x%08x\n",
729 sc->cs32_base, sc->cs16_base, sc->ds_base);
730 printf("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
731 sc->cs_entry, is_enabled(sc->slow_idle_cpu),
732 is_enabled(!sc->disabled));
733 printf("apm: CS_limit=0x%x, DS_limit=0x%x\n",
734 sc->cs_limit, sc->ds_limit);
735#endif /* APM_DEBUG */
736
737#if 0
738 /* Workaround for some buggy APM BIOS implementations */
739 sc->cs_limit = 0xffff;
740 sc->ds_limit = 0xffff;
741#endif
742
743 /* setup GDT */
744 setup_apm_gdt(sc->cs32_base, sc->cs16_base, sc->ds_base,
745 sc->cs_limit, sc->ds_limit);
746
747 /* setup entry point 48bit pointer */
748 apm_addr.segment = GSEL(GAPMCODE32_SEL, SEL_KPL);
749 apm_addr.offset = sc->cs_entry;
750
751 if ((dvp->id_flags & 0x10)) {
752 if ((dvp->id_flags & 0xf) >= 0x2) {
753 apm_driver_version(0x102);
754 }
755 if (!apm_version && (dvp->id_flags & 0xf) >= 0x1) {
756 apm_driver_version(0x101);
757 }
758 } else {
759 apm_driver_version(0x102);
760 if (!apm_version)
761 apm_driver_version(0x101);
762 }
763 if (!apm_version)
764 apm_version = 0x100;
765
766 sc->minorversion = ((apm_version & 0x00f0) >> 4) * 10 +
767 ((apm_version & 0x000f) >> 0);
768 sc->majorversion = ((apm_version & 0xf000) >> 12) * 10 +
769 ((apm_version & 0x0f00) >> 8);
770
771 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
772
773#ifdef APM_DEBUG
774 if (sc->intversion >= INTVERSION(1, 1))
775 printf("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
776#endif
777
778 printf("apm: found APM BIOS version %d.%d\n",
779 sc->majorversion, sc->minorversion);
780
781#ifdef APM_DEBUG
782 printf("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
783#endif
784
785 /* enable power management */
786 if (sc->disabled) {
787 if (apm_enable_disable_pm(1)) {
788#ifdef APM_DEBUG
789 printf("apm: *Warning* enable function failed! [%x]\n",
790 apm_errno);
791#endif
792 }
793 }
794
795 /* engage power managment (APM 1.1 or later) */
796 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
797 if (apm_engage_disengage_pm(1)) {
798#ifdef APM_DEBUG
799 printf("apm: *Warning* engage function failed err=[%x]",
800 apm_errno);
801 printf(" (Docked or using external power?).\n");
802#endif
803 }
804 }
805
806 /* default suspend hook */
807 sc->sc_suspend.ah_fun = apm_default_suspend;
808 sc->sc_suspend.ah_arg = sc;
809 sc->sc_suspend.ah_name = "default suspend";
810 sc->sc_suspend.ah_order = APM_MAX_ORDER;
811
812 /* default resume hook */
813 sc->sc_resume.ah_fun = apm_default_resume;
814 sc->sc_resume.ah_arg = sc;
815 sc->sc_resume.ah_name = "default resume";
816 sc->sc_resume.ah_order = APM_MIN_ORDER;
817
818 apm_hook_establish(APM_HOOK_SUSPEND, &sc->sc_suspend);
819 apm_hook_establish(APM_HOOK_RESUME , &sc->sc_resume);
820
821 apm_event_enable();
822
823 sc->initialized = 1;
824
825#ifdef DEVFS
826 sc->sc_devfs_token =
827 devfs_add_devswf(&apm_cdevsw, 0, DV_CHR, 0, 0, 0600, "apm");
828#endif
829 return 0;
830}
831
832static int
833apmopen(dev_t dev, int flag, int fmt, struct proc *p)
834{
835 struct apm_softc *sc = &apm_softc;
836
837 if (minor(dev) != 0 || !sc->initialized)
838 return (ENXIO);
839
840 return 0;
841}
842
843static int
844apmclose(dev_t dev, int flag, int fmt, struct proc *p)
845{
846 return 0;
847}
848
849static int
850apmioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p)
851{
852 struct apm_softc *sc = &apm_softc;
853 int error = 0;
854 int newstate;
855
856 if (minor(dev) != 0 || !sc->initialized)
857 return (ENXIO);
858#ifdef APM_DEBUG
859 printf("APM ioctl: cmd = 0x%x\n", cmd);
860#endif
861 switch (cmd) {
862 case APMIO_SUSPEND:
863 if ( sc->active)
864 apm_suspend();
865 else
866 error = EINVAL;
867 break;
868 case APMIO_GETINFO_OLD:
869 {
870 struct apm_info info;
871 apm_info_old_t aiop;
872
873 if (apm_get_info(&info))
874 error = ENXIO;
875 aiop = (apm_info_old_t)addr;
876 aiop->ai_major = info.ai_major;
877 aiop->ai_minor = info.ai_minor;
878 aiop->ai_acline = info.ai_acline;
879 aiop->ai_batt_stat = info.ai_batt_stat;
880 aiop->ai_batt_life = info.ai_batt_life;
881 aiop->ai_status = info.ai_status;
882 }
883 break;
884 case APMIO_GETINFO:
885 if (apm_get_info((apm_info_t)addr))
886 error = ENXIO;
887 break;
888 case APMIO_ENABLE:
889 apm_event_enable();
890 break;
891 case APMIO_DISABLE:
892 apm_event_disable();
893 break;
894 case APMIO_HALTCPU:
895 apm_halt_cpu();
896 break;
897 case APMIO_NOTHALTCPU:
898 apm_not_halt_cpu();
899 break;
900 case APMIO_DISPLAY:
901 newstate = *(int *)addr;
902 if (apm_display(newstate))
903 error = ENXIO;
904 break;
905 case APMIO_BIOS:
906 if (apm_bios_call((struct apm_bios_arg*)addr))
907 error = EIO;
908 break;
909 default:
910 error = EINVAL;
911 break;
912 }
913 return error;
914}
915
916
917static apm_devsw_installed = 0;
918
919static void
920apm_drvinit(void *unused)
921{
922 dev_t dev;
923
924 if( ! apm_devsw_installed ) {
925 dev = makedev(CDEV_MAJOR,0);
926 cdevsw_add(&dev,&apm_cdevsw,NULL);
927 apm_devsw_installed = 1;
928 }
929}
930
931SYSINIT(apmdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,apm_drvinit,NULL)
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 * $Id: apm.c,v 1.67 1997/12/23 16:32:35 nate Exp $
19 */
20
21#include "opt_devfs.h"
22
23#include <sys/param.h>
24#include <sys/conf.h>
25#include <sys/kernel.h>
26#ifdef DEVFS
27#include <sys/devfsext.h>
28#endif /*DEVFS*/
29#include <sys/systm.h>
30#include <sys/time.h>
31#include <i386/isa/isa_device.h>
32#include <machine/apm_bios.h>
33#include <machine/segments.h>
34#include <machine/clock.h>
35#include <vm/vm.h>
36#include <vm/vm_param.h>
37#include <vm/pmap.h>
38#include <sys/syslog.h>
39#include <i386/apm/apm_setup.h>
40
41static int apm_display __P((int newstate));
42static int apm_int __P((u_long *eax, u_long *ebx, u_long *ecx, u_long *edx));
43static void apm_resume __P((void));
44
45/* static data */
46struct apm_softc {
47 int initialized, active;
48 int always_halt_cpu, slow_idle_cpu;
49 int disabled, disengaged;
50 u_int minorversion, majorversion;
51 u_int cs32_base, cs16_base, ds_base;
52 u_int cs_limit, ds_limit;
53 u_int cs_entry;
54 u_int intversion;
55 struct apmhook sc_suspend;
56 struct apmhook sc_resume;
57#ifdef DEVFS
58 void *sc_devfs_token;
59#endif
60};
61
62static struct apm_softc apm_softc;
63static struct apmhook *hook[NAPM_HOOK]; /* XXX */
64
65#define is_enabled(foo) ((foo) ? "enabled" : "disabled")
66
67/* Map version number to integer (keeps ordering of version numbers) */
68#define INTVERSION(major, minor) ((major)*100 + (minor))
69
70static struct callout_handle apm_timeout_ch =
71 CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch);
72
73static timeout_t apm_timeout;
74static d_open_t apmopen;
75static d_close_t apmclose;
76static d_ioctl_t apmioctl;
77
78#define CDEV_MAJOR 39
79static struct cdevsw apm_cdevsw =
80 { apmopen, apmclose, noread, nowrite, /*39*/
81 apmioctl, nostop, nullreset, nodevtotty,/* APM */
82 seltrue, nommap, NULL , "apm" ,NULL, -1};
83
84/* setup APM GDT discriptors */
85static void
86setup_apm_gdt(u_int code32_base, u_int code16_base, u_int data_base, u_int code_limit, u_int data_limit)
87{
88 /* setup 32bit code segment */
89 gdt_segs[GAPMCODE32_SEL].ssd_base = code32_base;
90 gdt_segs[GAPMCODE32_SEL].ssd_limit = code_limit;
91
92 /* setup 16bit code segment */
93 gdt_segs[GAPMCODE16_SEL].ssd_base = code16_base;
94 gdt_segs[GAPMCODE16_SEL].ssd_limit = code_limit;
95
96 /* setup data segment */
97 gdt_segs[GAPMDATA_SEL ].ssd_base = data_base;
98 gdt_segs[GAPMDATA_SEL ].ssd_limit = data_limit;
99
100 /* reflect these changes on physical GDT */
101 ssdtosd(gdt_segs + GAPMCODE32_SEL, &gdt[GAPMCODE32_SEL].sd);
102 ssdtosd(gdt_segs + GAPMCODE16_SEL, &gdt[GAPMCODE16_SEL].sd);
103 ssdtosd(gdt_segs + GAPMDATA_SEL , &gdt[GAPMDATA_SEL ].sd);
104}
105
106/* 48bit far pointer */
107struct addr48 {
108 u_long offset;
109 u_short segment;
110} apm_addr;
111
112static int apm_errno;
113
114static int
115apm_int(u_long *eax, u_long *ebx, u_long *ecx, u_long *edx)
116{
117 struct apm_bios_arg apa;
118 int cf;
119
120 apa.eax = *eax;
121 apa.ebx = *ebx;
122 apa.ecx = *ecx;
123 apa.edx = *edx;
124 cf = apm_bios_call(&apa);
125 *eax = apa.eax;
126 *ebx = apa.ebx;
127 *ecx = apa.ecx;
128 *edx = apa.edx;
129 apm_errno = ((*eax) >> 8) & 0xff;
130 return cf;
131}
132
133
134/* enable/disable power management */
135static int
136apm_enable_disable_pm(int enable)
137{
138 struct apm_softc *sc = &apm_softc;
139
140 u_long eax, ebx, ecx, edx;
141
142 eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
143
144 if (sc->intversion >= INTVERSION(1, 1))
145 ebx = PMDV_ALLDEV;
146 else
147 ebx = 0xffff; /* APM version 1.0 only */
148 ecx = enable;
149 edx = 0;
150 return apm_int(&eax, &ebx, &ecx, &edx);
151}
152
153static void
154apm_driver_version(int version)
155{
156 u_long eax, ebx, ecx, edx;
157
158 /* First try APM 1.2 */
159 eax = (APM_BIOS << 8) | APM_DRVVERSION;
160 ebx = 0x0;
161 ecx = version;
162 edx = 0;
163 if(!apm_int(&eax, &ebx, &ecx, &edx))
164 apm_version = eax & 0xffff;
165}
166
167/* engage/disengage power management (APM 1.1 or later) */
168static int
169apm_engage_disengage_pm(int engage)
170{
171 u_long eax, ebx, ecx, edx;
172
173 eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
174 ebx = PMDV_ALLDEV;
175 ecx = engage;
176 edx = 0;
177 return(apm_int(&eax, &ebx, &ecx, &edx));
178}
179
180/* get PM event */
181static u_int
182apm_getevent(void)
183{
184 u_long eax, ebx, ecx, edx;
185
186 eax = (APM_BIOS << 8) | APM_GETPMEVENT;
187
188 ebx = 0;
189 ecx = 0;
190 edx = 0;
191 if (apm_int(&eax, &ebx, &ecx, &edx))
192 return PMEV_NOEVENT;
193
194 return ebx & 0xffff;
195}
196
197/* suspend entire system */
198static int
199apm_suspend_system(void)
200{
201 u_long eax, ebx, ecx, edx;
202
203 eax = (APM_BIOS << 8) | APM_SETPWSTATE;
204 ebx = PMDV_ALLDEV;
205 ecx = PMST_SUSPEND;
206 edx = 0;
207
208 if (apm_int(&eax, &ebx, &ecx, &edx)) {
209 printf("Entire system suspend failure: errcode = %ld\n",
210 0xff & (eax >> 8));
211 return 1;
212 }
213 return 0;
214}
215
216/* Display control */
217/*
218 * Experimental implementation: My laptop machine can't handle this function
219 * If your laptop can control the display via APM, please inform me.
220 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
221 */
222static int
223apm_display(int newstate)
224{
225 u_long eax, ebx, ecx, edx;
226
227 eax = (APM_BIOS << 8) | APM_SETPWSTATE;
228 ebx = PMDV_DISP0;
229 ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
230 edx = 0;
231 if (apm_int(&eax, &ebx, &ecx, &edx)) {
232 printf("Display off failure: errcode = %ld\n",
233 0xff & (eax >> 8));
234 return 1;
235 }
236 return 0;
237}
238
239/*
240 * Turn off the entire system.
241 */
242void
243apm_power_off(void)
244{
245 u_long eax, ebx, ecx, edx;
246
247 if (!apm_softc.active)
248 return;
249 eax = (APM_BIOS << 8) | APM_SETPWSTATE;
250 ebx = PMDV_ALLDEV;
251 ecx = PMST_OFF;
252 edx = 0;
253 apm_int(&eax, &ebx, &ecx, &edx);
254}
255
256/* APM Battery low handler */
257static void
258apm_battery_low(void)
259{
260 printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
261}
262
263/* APM hook manager */
264static struct apmhook *
265apm_add_hook(struct apmhook **list, struct apmhook *ah)
266{
267 int s;
268 struct apmhook *p, *prev;
269
270#ifdef APM_DEBUG
271 printf("Add hook \"%s\"\n", ah->ah_name);
272#endif
273
274 s = splhigh();
275 if (ah == NULL)
276 panic("illegal apm_hook!");
277 prev = NULL;
278 for (p = *list; p != NULL; prev = p, p = p->ah_next)
279 if (p->ah_order > ah->ah_order)
280 break;
281
282 if (prev == NULL) {
283 ah->ah_next = *list;
284 *list = ah;
285 } else {
286 ah->ah_next = prev->ah_next;
287 prev->ah_next = ah;
288 }
289 splx(s);
290 return ah;
291}
292
293static void
294apm_del_hook(struct apmhook **list, struct apmhook *ah)
295{
296 int s;
297 struct apmhook *p, *prev;
298
299 s = splhigh();
300 prev = NULL;
301 for (p = *list; p != NULL; prev = p, p = p->ah_next)
302 if (p == ah)
303 goto deleteit;
304 panic("Tried to delete unregistered apm_hook.");
305 goto nosuchnode;
306deleteit:
307 if (prev != NULL)
308 prev->ah_next = p->ah_next;
309 else
310 *list = p->ah_next;
311nosuchnode:
312 splx(s);
313}
314
315
316/* APM driver calls some functions automatically */
317static void
318apm_execute_hook(struct apmhook *list)
319{
320 struct apmhook *p;
321
322 for (p = list; p != NULL; p = p->ah_next) {
323#ifdef APM_DEBUG
324 printf("Execute APM hook \"%s.\"\n", p->ah_name);
325#endif
326 if ((*(p->ah_fun))(p->ah_arg))
327 printf("Warning: APM hook \"%s\" failed", p->ah_name);
328 }
329}
330
331
332/* establish an apm hook */
333struct apmhook *
334apm_hook_establish(int apmh, struct apmhook *ah)
335{
336 if (apmh < 0 || apmh >= NAPM_HOOK)
337 return NULL;
338
339 return apm_add_hook(&hook[apmh], ah);
340}
341
342/* disestablish an apm hook */
343void
344apm_hook_disestablish(int apmh, struct apmhook *ah)
345{
346 if (apmh < 0 || apmh >= NAPM_HOOK)
347 return;
348
349 apm_del_hook(&hook[apmh], ah);
350}
351
352
353static struct timeval suspend_time;
354static struct timeval diff_time;
355
356static int
357apm_default_resume(void *arg)
358{
359 int pl;
360 u_int second, minute, hour;
361 struct timeval resume_time, tmp_time;
362
363 /* modified for adjkerntz */
364 pl = splsoftclock();
365 inittodr(0); /* adjust time to RTC */
366 microtime(&resume_time);
367 tmp_time = time; /* because 'time' is volatile */
368 timevaladd(&tmp_time, &diff_time);
369 time = tmp_time;
370#ifdef APM_FIXUP_CALLTODO
371 /* Calculate the delta time suspended */
372 timevalsub(&resume_time, &suspend_time);
373 /* Fixup the calltodo list with the delta time. */
374 adjust_timeout_calltodo(&resume_time);
375#endif /* APM_FIXUP_CALLTODOK */
376 splx(pl);
377#ifndef APM_FIXUP_CALLTODO
378 second = resume_time.tv_sec - suspend_time.tv_sec;
379#else /* APM_FIXUP_CALLTODO */
380 /*
381 * We've already calculated resume_time to be the delta between
382 * the suspend and the resume.
383 */
384 second = resume_time.tv_sec;
385#endif /* APM_FIXUP_CALLTODO */
386 hour = second / 3600;
387 second %= 3600;
388 minute = second / 60;
389 second %= 60;
390 log(LOG_NOTICE, "resumed from suspended mode (slept %02d:%02d:%02d)\n",
391 hour, minute, second);
392 return 0;
393}
394
395static int
396apm_default_suspend(void *arg)
397{
398 int pl;
399
400 pl = splsoftclock();
401 microtime(&diff_time);
402 inittodr(0);
403 microtime(&suspend_time);
404 timevalsub(&diff_time, &suspend_time);
405 splx(pl);
406 return 0;
407}
408
409static void apm_processevent(void);
410
411/*
412 * Public interface to the suspend/resume:
413 *
414 * Execute suspend and resume hook before and after sleep, respectively.
415 *
416 */
417
418void
419apm_suspend(void)
420{
421 struct apm_softc *sc = &apm_softc;
422
423 if (!sc)
424 return;
425
426 if (sc->initialized) {
427 apm_execute_hook(hook[APM_HOOK_SUSPEND]);
428 if (apm_suspend_system() == 0)
429 apm_processevent();
430 else
431 /* Failure, 'resume' the system again */
432 apm_execute_hook(hook[APM_HOOK_RESUME]);
433 }
434}
435
436void
437apm_resume(void)
438{
439 struct apm_softc *sc = &apm_softc;
440
441 if (!sc)
442 return;
443
444 if (sc->initialized)
445 apm_execute_hook(hook[APM_HOOK_RESUME]);
446}
447
448
449/* get APM information */
450static int
451apm_get_info(apm_info_t aip)
452{
453 struct apm_softc *sc = &apm_softc;
454 u_long eax, ebx, ecx, edx;
455
456 eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
457 ebx = PMDV_ALLDEV;
458 ecx = 0;
459 edx = 0xffff; /* default to unknown battery time */
460
461 if (apm_int(&eax, &ebx, &ecx, &edx))
462 return 1;
463
464 aip->ai_infoversion = 0;
465 aip->ai_acline = (ebx >> 8) & 0xff;
466 aip->ai_batt_stat = ebx & 0xff;
467 aip->ai_batt_life = ecx & 0xff;
468 aip->ai_major = (u_int)sc->majorversion;
469 aip->ai_minor = (u_int)sc->minorversion;
470 aip->ai_status = (u_int)sc->active;
471 edx &= 0xffff;
472 if (edx == 0xffff) /* Time is unknown */
473 aip->ai_batt_time = -1;
474 else if (edx & 0x8000) /* Time is in minutes */
475 aip->ai_batt_time = (edx & 0x7fff) * 60;
476 else /* Time is in seconds */
477 aip->ai_batt_time = edx;
478 bzero(aip->ai_spare, sizeof aip->ai_spare);
479
480 return 0;
481}
482
483
484/* inform APM BIOS that CPU is idle */
485void
486apm_cpu_idle(void)
487{
488 struct apm_softc *sc = &apm_softc;
489
490 if (sc->active) {
491 u_long eax, ebx, ecx, edx;
492
493 eax = (APM_BIOS <<8) | APM_CPUIDLE;
494 edx = ecx = ebx = 0;
495 apm_int(&eax, &ebx, &ecx, &edx);
496 }
497 /*
498 * Some APM implementation halts CPU in BIOS, whenever
499 * "CPU-idle" function are invoked, but swtch() of
500 * FreeBSD halts CPU, therefore, CPU is halted twice
501 * in the sched loop. It makes the interrupt latency
502 * terribly long and be able to cause a serious problem
503 * in interrupt processing. We prevent it by removing
504 * "hlt" operation from swtch() and managed it under
505 * APM driver.
506 */
507 if (!sc->active || sc->always_halt_cpu)
508 __asm("hlt"); /* wait for interrupt */
509}
510
511/* inform APM BIOS that CPU is busy */
512void
513apm_cpu_busy(void)
514{
515 struct apm_softc *sc = &apm_softc;
516
517 /*
518 * The APM specification says this is only necessary if your BIOS
519 * slows down the processor in the idle task, otherwise it's not
520 * necessary.
521 */
522 if (sc->slow_idle_cpu && sc->active) {
523 u_long eax, ebx, ecx, edx;
524
525 eax = (APM_BIOS <<8) | APM_CPUBUSY;
526 edx = ecx = ebx = 0;
527 apm_int(&eax, &ebx, &ecx, &edx);
528 }
529}
530
531
532/*
533 * APM timeout routine:
534 *
535 * This routine is automatically called by timer once per second.
536 */
537
538static void
539apm_timeout(void *dummy)
540{
541 struct apm_softc *sc = &apm_softc;
542
543 apm_processevent();
544 if (sc->active == 1)
545 /* Run slightly more oftan than 1 Hz */
546 apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1 );
547}
548
549/* enable APM BIOS */
550static void
551apm_event_enable(void)
552{
553 struct apm_softc *sc = &apm_softc;
554
555#ifdef APM_DEBUG
556 printf("called apm_event_enable()\n");
557#endif
558 if (sc->initialized) {
559 sc->active = 1;
560 apm_timeout(sc);
561 }
562}
563
564/* disable APM BIOS */
565static void
566apm_event_disable(void)
567{
568 struct apm_softc *sc = &apm_softc;
569
570#ifdef APM_DEBUG
571 printf("called apm_event_disable()\n");
572#endif
573 if (sc->initialized) {
574 untimeout(apm_timeout, NULL, apm_timeout_ch);
575 sc->active = 0;
576 }
577}
578
579/* halt CPU in scheduling loop */
580static void
581apm_halt_cpu(void)
582{
583 struct apm_softc *sc = &apm_softc;
584
585 if (sc->initialized)
586 sc->always_halt_cpu = 1;
587}
588
589/* don't halt CPU in scheduling loop */
590static void
591apm_not_halt_cpu(void)
592{
593 struct apm_softc *sc = &apm_softc;
594
595 if (sc->initialized)
596 sc->always_halt_cpu = 0;
597}
598
599/* device driver definitions */
600static int apmprobe (struct isa_device *);
601static int apmattach(struct isa_device *);
602struct isa_driver apmdriver = { apmprobe, apmattach, "apm" };
603
604/*
605 * probe APM (dummy):
606 *
607 * APM probing routine is placed on locore.s and apm_init.S because
608 * this process forces the CPU to turn to real mode or V86 mode.
609 * Current version uses real mode, but in a future version, we want
610 * to use V86 mode in APM initialization.
611 */
612
613static int
614apmprobe(struct isa_device *dvp)
615{
616 bzero(&apm_softc, sizeof(apm_softc));
617
618 if ( dvp->id_unit > 0 ) {
619 printf("apm: Only one APM driver supported.\n");
620 return 0;
621 }
622 switch (apm_version) {
623 case APMINI_CANTFIND:
624 /* silent */
625 return 0;
626 case APMINI_NOT32BIT:
627 printf("apm: 32bit connection is not supported.\n");
628 return 0;
629 case APMINI_CONNECTERR:
630 printf("apm: 32-bit connection error.\n");
631 return 0;
632 }
633 if (dvp->id_flags & 0x20)
634 statclock_disable = 1;
635 return -1;
636}
637
638
639/* Process APM event */
640static void
641apm_processevent(void)
642{
643 int apm_event;
644
645#ifdef APM_DEBUG
646# define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
647 printf("Received APM Event: " #symbol "\n");
648#else
649# define OPMEV_DEBUGMESSAGE(symbol) case symbol:
650#endif
651 do {
652 apm_event = apm_getevent();
653 switch (apm_event) {
654 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
655 apm_suspend();
656 break;
657 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
658 apm_suspend();
659 break;
660 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
661 apm_suspend();
662 break;
663 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
664 apm_suspend();
665 break;
666 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
667 apm_resume();
668 break;
669 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
670 apm_resume();
671 break;
672 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
673 apm_resume();
674 break;
675 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
676 apm_battery_low();
677 apm_suspend();
678 break;
679 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
680 break;
681 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
682 inittodr(0); /* adjust time to RTC */
683 break;
684 case PMEV_NOEVENT:
685 break;
686 default:
687 printf("Unknown Original APM Event 0x%x\n", apm_event);
688 break;
689 }
690 } while (apm_event != PMEV_NOEVENT);
691}
692
693/*
694 * Attach APM:
695 *
696 * Initialize APM driver (APM BIOS itself has been initialized in locore.s)
697 */
698
699static int
700apmattach(struct isa_device *dvp)
701{
702#define APM_KERNBASE KERNBASE
703 struct apm_softc *sc = &apm_softc;
704
705 sc->initialized = 0;
706
707 /* Must be externally enabled */
708 sc->active = 0;
709
710 /* setup APM parameters */
711 sc->cs16_base = (apm_cs16_base << 4) + APM_KERNBASE;
712 sc->cs32_base = (apm_cs32_base << 4) + APM_KERNBASE;
713 sc->ds_base = (apm_ds_base << 4) + APM_KERNBASE;
714 sc->cs_limit = apm_cs_limit;
715 sc->ds_limit = apm_ds_limit;
716 sc->cs_entry = apm_cs_entry;
717
718 /* Always call HLT in idle loop */
719 sc->always_halt_cpu = 1;
720
721 sc->slow_idle_cpu = ((apm_flags & APM_CPUIDLE_SLOW) != 0);
722 sc->disabled = ((apm_flags & APM_DISABLED) != 0);
723 sc->disengaged = ((apm_flags & APM_DISENGAGED) != 0);
724
725 /* print bootstrap messages */
726#ifdef APM_DEBUG
727 printf("apm: APM BIOS version %04x\n", apm_version);
728 printf("apm: Code32 0x%08x, Code16 0x%08x, Data 0x%08x\n",
729 sc->cs32_base, sc->cs16_base, sc->ds_base);
730 printf("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
731 sc->cs_entry, is_enabled(sc->slow_idle_cpu),
732 is_enabled(!sc->disabled));
733 printf("apm: CS_limit=0x%x, DS_limit=0x%x\n",
734 sc->cs_limit, sc->ds_limit);
735#endif /* APM_DEBUG */
736
737#if 0
738 /* Workaround for some buggy APM BIOS implementations */
739 sc->cs_limit = 0xffff;
740 sc->ds_limit = 0xffff;
741#endif
742
743 /* setup GDT */
744 setup_apm_gdt(sc->cs32_base, sc->cs16_base, sc->ds_base,
745 sc->cs_limit, sc->ds_limit);
746
747 /* setup entry point 48bit pointer */
748 apm_addr.segment = GSEL(GAPMCODE32_SEL, SEL_KPL);
749 apm_addr.offset = sc->cs_entry;
750
751 if ((dvp->id_flags & 0x10)) {
752 if ((dvp->id_flags & 0xf) >= 0x2) {
753 apm_driver_version(0x102);
754 }
755 if (!apm_version && (dvp->id_flags & 0xf) >= 0x1) {
756 apm_driver_version(0x101);
757 }
758 } else {
759 apm_driver_version(0x102);
760 if (!apm_version)
761 apm_driver_version(0x101);
762 }
763 if (!apm_version)
764 apm_version = 0x100;
765
766 sc->minorversion = ((apm_version & 0x00f0) >> 4) * 10 +
767 ((apm_version & 0x000f) >> 0);
768 sc->majorversion = ((apm_version & 0xf000) >> 12) * 10 +
769 ((apm_version & 0x0f00) >> 8);
770
771 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
772
773#ifdef APM_DEBUG
774 if (sc->intversion >= INTVERSION(1, 1))
775 printf("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
776#endif
777
778 printf("apm: found APM BIOS version %d.%d\n",
779 sc->majorversion, sc->minorversion);
780
781#ifdef APM_DEBUG
782 printf("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
783#endif
784
785 /* enable power management */
786 if (sc->disabled) {
787 if (apm_enable_disable_pm(1)) {
788#ifdef APM_DEBUG
789 printf("apm: *Warning* enable function failed! [%x]\n",
790 apm_errno);
791#endif
792 }
793 }
794
795 /* engage power managment (APM 1.1 or later) */
796 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
797 if (apm_engage_disengage_pm(1)) {
798#ifdef APM_DEBUG
799 printf("apm: *Warning* engage function failed err=[%x]",
800 apm_errno);
801 printf(" (Docked or using external power?).\n");
802#endif
803 }
804 }
805
806 /* default suspend hook */
807 sc->sc_suspend.ah_fun = apm_default_suspend;
808 sc->sc_suspend.ah_arg = sc;
809 sc->sc_suspend.ah_name = "default suspend";
810 sc->sc_suspend.ah_order = APM_MAX_ORDER;
811
812 /* default resume hook */
813 sc->sc_resume.ah_fun = apm_default_resume;
814 sc->sc_resume.ah_arg = sc;
815 sc->sc_resume.ah_name = "default resume";
816 sc->sc_resume.ah_order = APM_MIN_ORDER;
817
818 apm_hook_establish(APM_HOOK_SUSPEND, &sc->sc_suspend);
819 apm_hook_establish(APM_HOOK_RESUME , &sc->sc_resume);
820
821 apm_event_enable();
822
823 sc->initialized = 1;
824
825#ifdef DEVFS
826 sc->sc_devfs_token =
827 devfs_add_devswf(&apm_cdevsw, 0, DV_CHR, 0, 0, 0600, "apm");
828#endif
829 return 0;
830}
831
832static int
833apmopen(dev_t dev, int flag, int fmt, struct proc *p)
834{
835 struct apm_softc *sc = &apm_softc;
836
837 if (minor(dev) != 0 || !sc->initialized)
838 return (ENXIO);
839
840 return 0;
841}
842
843static int
844apmclose(dev_t dev, int flag, int fmt, struct proc *p)
845{
846 return 0;
847}
848
849static int
850apmioctl(dev_t dev, int cmd, caddr_t addr, int flag, struct proc *p)
851{
852 struct apm_softc *sc = &apm_softc;
853 int error = 0;
854 int newstate;
855
856 if (minor(dev) != 0 || !sc->initialized)
857 return (ENXIO);
858#ifdef APM_DEBUG
859 printf("APM ioctl: cmd = 0x%x\n", cmd);
860#endif
861 switch (cmd) {
862 case APMIO_SUSPEND:
863 if ( sc->active)
864 apm_suspend();
865 else
866 error = EINVAL;
867 break;
868 case APMIO_GETINFO_OLD:
869 {
870 struct apm_info info;
871 apm_info_old_t aiop;
872
873 if (apm_get_info(&info))
874 error = ENXIO;
875 aiop = (apm_info_old_t)addr;
876 aiop->ai_major = info.ai_major;
877 aiop->ai_minor = info.ai_minor;
878 aiop->ai_acline = info.ai_acline;
879 aiop->ai_batt_stat = info.ai_batt_stat;
880 aiop->ai_batt_life = info.ai_batt_life;
881 aiop->ai_status = info.ai_status;
882 }
883 break;
884 case APMIO_GETINFO:
885 if (apm_get_info((apm_info_t)addr))
886 error = ENXIO;
887 break;
888 case APMIO_ENABLE:
889 apm_event_enable();
890 break;
891 case APMIO_DISABLE:
892 apm_event_disable();
893 break;
894 case APMIO_HALTCPU:
895 apm_halt_cpu();
896 break;
897 case APMIO_NOTHALTCPU:
898 apm_not_halt_cpu();
899 break;
900 case APMIO_DISPLAY:
901 newstate = *(int *)addr;
902 if (apm_display(newstate))
903 error = ENXIO;
904 break;
905 case APMIO_BIOS:
906 if (apm_bios_call((struct apm_bios_arg*)addr))
907 error = EIO;
908 break;
909 default:
910 error = EINVAL;
911 break;
912 }
913 return error;
914}
915
916
917static apm_devsw_installed = 0;
918
919static void
920apm_drvinit(void *unused)
921{
922 dev_t dev;
923
924 if( ! apm_devsw_installed ) {
925 dev = makedev(CDEV_MAJOR,0);
926 cdevsw_add(&dev,&apm_cdevsw,NULL);
927 apm_devsw_installed = 1;
928 }
929}
930
931SYSINIT(apmdev,SI_SUB_DRIVERS,SI_ORDER_MIDDLE+CDEV_MAJOR,apm_drvinit,NULL)