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