2 * APM (Advanced Power Management) BIOS Device Driver
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>
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
16 * Sep, 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD)
18 * $FreeBSD: src/sys/i386/apm/apm.c,v 1.114.2.5 2002/11/02 04:41:50 iwasaki Exp $
19 * $DragonFly: src/sys/platform/pc32/apm/apm.c,v 1.17 2006/09/10 01:26:38 dillon Exp $
22 #include <sys/param.h>
23 #include <sys/systm.h>
24 #include <sys/eventhandler.h>
26 #include <sys/device.h>
27 #include <sys/kernel.h>
29 #include <sys/reboot.h>
31 #include <sys/selinfo.h>
33 #include <sys/fcntl.h>
35 #include <sys/signalvar.h>
36 #include <sys/sysctl.h>
37 #include <machine/apm_bios.h>
38 #include <machine/segments.h>
39 #include <machine/clock.h>
41 #include <vm/vm_param.h>
43 #include <sys/syslog.h>
44 #include <sys/thread2.h>
46 #include <machine/pc/bios.h>
47 #include <machine/vm86.h>
49 #include <i386/apm/apm.h>
51 /* Used by the apm_saver screen saver module */
52 int apm_display (int newstate);
53 struct apm_softc apm_softc;
55 static void apm_resume (void);
56 static int apm_bioscall(void);
57 static int apm_check_function_supported (u_int version, u_int func);
59 static u_long apm_version;
63 #define SCFLAG_ONORMAL 0x0000001
64 #define SCFLAG_OCTL 0x0000002
65 #define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL)
67 #define APMDEV(dev) (minor(dev)&0x0f)
68 #define APMDEV_NORMAL 0
71 static struct apmhook *hook[NAPM_HOOK]; /* XXX */
73 #define is_enabled(foo) ((foo) ? "enabled" : "disabled")
75 /* Map version number to integer (keeps ordering of version numbers) */
76 #define INTVERSION(major, minor) ((major)*100 + (minor))
78 static struct callout apm_timeout_ch;
80 static timeout_t apm_timeout;
81 static d_open_t apmopen;
82 static d_close_t apmclose;
83 static d_write_t apmwrite;
84 static d_ioctl_t apmioctl;
85 static d_poll_t apmpoll;
88 static struct dev_ops apm_ops = {
89 { "apm", CDEV_MAJOR, 0 },
97 static int apm_suspend_delay = 1;
98 static int apm_standby_delay = 1;
99 static int apm_debug = 0;
101 #define APM_DPRINT(args...) do { \
107 SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, "");
108 SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, "");
109 SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, "");
112 * return 0 if the function successfull,
113 * return 1 if the function unsuccessfull,
114 * return -1 if the function unsupported.
119 struct apm_softc *sc = &apm_softc;
121 u_int apm_func = sc->bios.r.eax & 0xff;
123 if (!apm_check_function_supported(sc->intversion, apm_func)) {
124 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n",
125 apm_func, sc->majorversion, sc->minorversion);
130 if (sc->connectmode == APM_PROT32CONNECT) {
131 set_bios_selectors(&sc->bios.seg,
132 BIOSCODE_FLAG | BIOSDATA_FLAG);
133 errno = bios32(&sc->bios.r,
134 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL));
136 errno = bios16(&sc->bios, NULL);
142 /* check whether APM function is supported (1) or not (0). */
144 apm_check_function_supported(u_int version, u_int func)
146 /* except driver version */
147 if (func == APM_DRVVERSION) {
152 case INTVERSION(1, 0):
153 if (func > APM_GETPMEVENT) {
154 return (0); /* not supported */
157 case INTVERSION(1, 1):
158 if (func > APM_ENGAGEDISENGAGEPM &&
159 func < APM_OEMFUNC) {
160 return (0); /* not supported */
163 case INTVERSION(1, 2):
167 return (1); /* supported */
170 /* enable/disable power management */
172 apm_enable_disable_pm(int enable)
174 struct apm_softc *sc = &apm_softc;
176 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
178 if (sc->intversion >= INTVERSION(1, 1))
179 sc->bios.r.ebx = PMDV_ALLDEV;
181 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */
182 sc->bios.r.ecx = enable;
184 return (apm_bioscall());
187 /* register driver version (APM 1.1 or later) */
189 apm_driver_version(int version)
191 struct apm_softc *sc = &apm_softc;
193 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION;
194 sc->bios.r.ebx = 0x0;
195 sc->bios.r.ecx = version;
198 if (apm_bioscall() == 0 && sc->bios.r.eax == version)
201 /* Some old BIOSes don't return the connection version in %ax. */
202 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION))
208 /* engage/disengage power management (APM 1.1 or later) */
210 apm_engage_disengage_pm(int engage)
212 struct apm_softc *sc = &apm_softc;
214 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
215 sc->bios.r.ebx = PMDV_ALLDEV;
216 sc->bios.r.ecx = engage;
218 return (apm_bioscall());
225 struct apm_softc *sc = &apm_softc;
227 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT;
233 return (PMEV_NOEVENT);
234 return (sc->bios.r.ebx & 0xffff);
237 /* suspend entire system */
239 apm_suspend_system(int state)
241 struct apm_softc *sc = &apm_softc;
243 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
244 sc->bios.r.ebx = PMDV_ALLDEV;
245 sc->bios.r.ecx = state;
248 if (apm_bioscall()) {
249 printf("Entire system suspend failure: errcode = %d\n",
250 0xff & (sc->bios.r.eax >> 8));
256 /* Display control */
258 * Experimental implementation: My laptop machine can't handle this function
259 * If your laptop can control the display via APM, please inform me.
260 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
263 apm_display(int newstate)
265 struct apm_softc *sc = &apm_softc;
267 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
268 sc->bios.r.ebx = PMDV_DISP0;
269 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
271 if (apm_bioscall() == 0) {
275 /* If failed, then try to blank all display devices instead. */
276 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
277 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */
278 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
280 if (apm_bioscall() == 0) {
283 printf("Display off failure: errcode = %d\n",
284 0xff & (sc->bios.r.eax >> 8));
289 * Turn off the entire system.
292 apm_power_off(void *junk, int howto)
294 struct apm_softc *sc = &apm_softc;
296 /* Not halting powering off, or not active */
297 if (!(howto & RB_POWEROFF) || !apm_softc.active)
299 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
300 sc->bios.r.ebx = PMDV_ALLDEV;
301 sc->bios.r.ecx = PMST_OFF;
306 /* APM Battery low handler */
308 apm_battery_low(void)
310 printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
313 /* APM hook manager */
314 static struct apmhook *
315 apm_add_hook(struct apmhook **list, struct apmhook *ah)
317 struct apmhook *p, *prev;
319 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name);
323 panic("illegal apm_hook!");
325 for (p = *list; p != NULL; prev = p, p = p->ah_next)
326 if (p->ah_order > ah->ah_order)
333 ah->ah_next = prev->ah_next;
341 apm_del_hook(struct apmhook **list, struct apmhook *ah)
343 struct apmhook *p, *prev;
347 for (p = *list; p != NULL; prev = p, p = p->ah_next)
350 panic("Tried to delete unregistered apm_hook.");
354 prev->ah_next = p->ah_next;
362 /* APM driver calls some functions automatically */
364 apm_execute_hook(struct apmhook *list)
368 for (p = list; p != NULL; p = p->ah_next) {
369 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name);
370 if ((*(p->ah_fun))(p->ah_arg))
371 printf("Warning: APM hook \"%s\" failed", p->ah_name);
376 /* establish an apm hook */
378 apm_hook_establish(int apmh, struct apmhook *ah)
380 if (apmh < 0 || apmh >= NAPM_HOOK)
383 return apm_add_hook(&hook[apmh], ah);
386 /* disestablish an apm hook */
388 apm_hook_disestablish(int apmh, struct apmhook *ah)
390 if (apmh < 0 || apmh >= NAPM_HOOK)
393 apm_del_hook(&hook[apmh], ah);
397 static struct timeval suspend_time;
398 static struct timeval diff_time;
401 apm_default_resume(void *arg)
403 u_int second, minute, hour;
404 struct timeval resume_time, tmp_time;
406 /* modified for adjkerntz */
408 timer_restore(); /* restore the all timers */
409 inittodr(0); /* adjust time to RTC */
410 microtime(&resume_time);
411 getmicrotime(&tmp_time);
412 timevaladd(&tmp_time, &diff_time);
415 /* XXX THIS DOESN'T WORK!!! */
419 #ifdef APM_FIXUP_CALLTODO
420 /* Calculate the delta time suspended */
421 timevalsub(&resume_time, &suspend_time);
422 /* Fixup the calltodo list with the delta time. */
423 adjust_timeout_calltodo(&resume_time);
424 #endif /* APM_FIXUP_CALLTODOK */
426 #ifndef APM_FIXUP_CALLTODO
427 second = resume_time.tv_sec - suspend_time.tv_sec;
428 #else /* APM_FIXUP_CALLTODO */
430 * We've already calculated resume_time to be the delta between
431 * the suspend and the resume.
433 second = resume_time.tv_sec;
434 #endif /* APM_FIXUP_CALLTODO */
435 hour = second / 3600;
437 minute = second / 60;
439 log(LOG_NOTICE, "resumed from suspended mode (slept %02d:%02d:%02d)\n",
440 hour, minute, second);
445 apm_default_suspend(void *arg)
448 microtime(&diff_time);
450 microtime(&suspend_time);
451 timevalsub(&diff_time, &suspend_time);
456 static int apm_record_event (struct apm_softc *, u_int);
457 static void apm_processevent(void);
459 static u_int apm_op_inprog = 0;
464 struct apm_softc *sc = &apm_softc;
471 sc->suspends = sc->suspend_countdown = 0;
473 if (sc->initialized) {
474 error = DEVICE_SUSPEND(root_bus);
476 DEVICE_RESUME(root_bus);
478 apm_execute_hook(hook[APM_HOOK_SUSPEND]);
479 if (apm_suspend_system(PMST_SUSPEND) == 0) {
482 /* Failure, 'resume' the system again */
483 apm_execute_hook(hook[APM_HOOK_RESUME]);
484 DEVICE_RESUME(root_bus);
493 struct apm_softc *sc = &apm_softc;
499 sc->standbys = sc->standby_countdown = 0;
501 if (sc->initialized) {
503 * As far as standby, we don't need to execute
504 * all of suspend hooks.
506 apm_default_suspend(&apm_softc);
507 if (apm_suspend_system(PMST_STANDBY) == 0)
513 apm_lastreq_notify(void)
515 struct apm_softc *sc = &apm_softc;
517 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
518 sc->bios.r.ebx = PMDV_ALLDEV;
519 sc->bios.r.ecx = PMST_LASTREQNOTIFY;
525 apm_lastreq_rejected(void)
527 struct apm_softc *sc = &apm_softc;
529 if (apm_op_inprog == 0) {
530 return 1; /* no operation in progress */
533 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
534 sc->bios.r.ebx = PMDV_ALLDEV;
535 sc->bios.r.ecx = PMST_LASTREQREJECT;
538 if (apm_bioscall()) {
539 APM_DPRINT("apm_lastreq_rejected: failed\n");
547 * Public interface to the suspend/resume:
549 * Execute suspend and resume hook before and after sleep, respectively.
554 apm_suspend(int state)
556 struct apm_softc *sc = &apm_softc;
558 if (!sc->initialized)
566 sc->suspend_countdown = apm_suspend_delay;
572 sc->standby_countdown = apm_standby_delay;
575 printf("apm_suspend: Unknown Suspend state 0x%x\n", state);
580 apm_lastreq_notify();
586 struct apm_softc *sc = &apm_softc;
591 if (sc->initialized) {
592 apm_execute_hook(hook[APM_HOOK_RESUME]);
593 DEVICE_RESUME(root_bus);
598 /* get power status per battery */
600 apm_get_pwstatus(apm_pwstatus_t app)
602 struct apm_softc *sc = &apm_softc;
604 if (app->ap_device != PMDV_ALLDEV &&
605 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
608 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
609 sc->bios.r.ebx = app->ap_device;
611 sc->bios.r.edx = 0xffff; /* default to unknown battery time */
616 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff;
617 app->ap_batt_stat = sc->bios.r.ebx & 0xff;
618 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff;
619 app->ap_batt_life = sc->bios.r.ecx & 0xff;
620 sc->bios.r.edx &= 0xffff;
621 if (sc->bios.r.edx == 0xffff) /* Time is unknown */
622 app->ap_batt_time = -1;
623 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */
624 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60;
625 else /* Time is in seconds */
626 app->ap_batt_time = sc->bios.r.edx;
632 /* get APM information */
634 apm_get_info(apm_info_t aip)
636 struct apm_softc *sc = &apm_softc;
637 struct apm_pwstatus aps;
639 bzero(&aps, sizeof(aps));
640 aps.ap_device = PMDV_ALLDEV;
641 if (apm_get_pwstatus(&aps))
644 aip->ai_infoversion = 1;
645 aip->ai_acline = aps.ap_acline;
646 aip->ai_batt_stat = aps.ap_batt_stat;
647 aip->ai_batt_life = aps.ap_batt_life;
648 aip->ai_batt_time = aps.ap_batt_time;
649 aip->ai_major = (u_int)sc->majorversion;
650 aip->ai_minor = (u_int)sc->minorversion;
651 aip->ai_status = (u_int)sc->active;
653 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES;
657 if (apm_bioscall()) {
658 aip->ai_batteries = -1; /* Unknown */
659 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */
661 aip->ai_batteries = sc->bios.r.ebx & 0xff;
662 aip->ai_capabilities = sc->bios.r.ecx & 0xf;
665 bzero(aip->ai_spare, sizeof aip->ai_spare);
671 /* inform APM BIOS that CPU is idle */
675 struct apm_softc *sc = &apm_softc;
679 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE;
680 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
684 * Some APM implementation halts CPU in BIOS, whenever
685 * "CPU-idle" function are invoked, but swtch() of
686 * FreeBSD halts CPU, therefore, CPU is halted twice
687 * in the sched loop. It makes the interrupt latency
688 * terribly long and be able to cause a serious problem
689 * in interrupt processing. We prevent it by removing
690 * "hlt" operation from swtch() and managed it under
693 if (!sc->active || sc->always_halt_cpu)
694 __asm("hlt"); /* wait for interrupt */
697 /* inform APM BIOS that CPU is busy */
701 struct apm_softc *sc = &apm_softc;
704 * The APM specification says this is only necessary if your BIOS
705 * slows down the processor in the idle task, otherwise it's not
708 if (sc->slow_idle_cpu && sc->active) {
710 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY;
711 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
718 * APM timeout routine:
720 * This routine is automatically called by timer once per second.
724 apm_timeout(void *dummy)
726 struct apm_softc *sc = &apm_softc;
729 apm_lastreq_notify();
731 if (sc->standbys && sc->standby_countdown-- <= 0)
734 if (sc->suspends && sc->suspend_countdown-- <= 0)
740 if (sc->active == 1) {
741 /* Run slightly more oftan than 1 Hz */
742 callout_reset(&apm_timeout_ch, hz - 1, apm_timeout, NULL);
746 /* enable APM BIOS */
748 apm_event_enable(void)
750 struct apm_softc *sc = &apm_softc;
752 APM_DPRINT("called apm_event_enable()\n");
753 if (sc->initialized) {
755 callout_init(&apm_timeout_ch);
760 /* disable APM BIOS */
762 apm_event_disable(void)
764 struct apm_softc *sc = &apm_softc;
766 APM_DPRINT("called apm_event_disable()\n");
767 if (sc->initialized) {
768 callout_stop(&apm_timeout_ch);
773 /* halt CPU in scheduling loop */
777 struct apm_softc *sc = &apm_softc;
780 sc->always_halt_cpu = 1;
783 /* don't halt CPU in scheduling loop */
785 apm_not_halt_cpu(void)
787 struct apm_softc *sc = &apm_softc;
790 sc->always_halt_cpu = 0;
793 /* device driver definitions */
799 apm_probe(device_t dev)
801 #define APM_KERNBASE KERNBASE
802 struct vm86frame vmf;
803 struct apm_softc *sc = &apm_softc;
806 if (resource_int_value("apm", 0, "disabled", &disabled) == 0
810 device_set_desc(dev, "APM BIOS");
812 if ( device_get_unit(dev) > 0 ) {
813 printf("apm: Only one APM driver supported.\n");
817 if (resource_int_value("apm", 0, "flags", &flags) != 0)
820 bzero(&vmf, sizeof(struct vm86frame)); /* safety */
821 bzero(&apm_softc, sizeof(apm_softc));
822 vmf.vmf_ah = APM_BIOS;
823 vmf.vmf_al = APM_INSTCHECK;
825 if (vm86_intcall(APM_INT, &vmf))
826 return ENXIO; /* APM not found */
827 if (vmf.vmf_bx != 0x504d) {
828 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
831 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
832 printf("apm: protected mode connections are not supported\n");
836 apm_version = vmf.vmf_ax;
837 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
838 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
839 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
841 vmf.vmf_ah = APM_BIOS;
842 vmf.vmf_al = APM_DISCONNECT;
844 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */
846 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
847 vmf.vmf_ah = APM_BIOS;
848 vmf.vmf_al = APM_PROT32CONNECT;
850 if (vm86_intcall(APM_INT, &vmf)) {
851 printf("apm: 32-bit connection error.\n");
854 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
855 sc->bios.seg.code32.limit = 0xffff;
856 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
857 sc->bios.seg.code16.limit = 0xffff;
858 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
859 sc->bios.seg.data.limit = 0xffff;
860 sc->bios.entry = vmf.vmf_ebx;
861 sc->connectmode = APM_PROT32CONNECT;
863 /* use 16-bit connection */
864 vmf.vmf_ah = APM_BIOS;
865 vmf.vmf_al = APM_PROT16CONNECT;
867 if (vm86_intcall(APM_INT, &vmf)) {
868 printf("apm: 16-bit connection error.\n");
871 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
872 sc->bios.seg.code16.limit = 0xffff;
873 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
874 sc->bios.seg.data.limit = 0xffff;
875 sc->bios.entry = vmf.vmf_bx;
876 sc->connectmode = APM_PROT16CONNECT;
883 * return 0 if the user will notice and handle the event,
884 * return 1 if the kernel driver should do so.
887 apm_record_event(struct apm_softc *sc, u_int event_type)
889 struct apm_event_info *evp;
891 if ((sc->sc_flags & SCFLAG_OPEN) == 0)
892 return 1; /* no user waiting */
893 if (sc->event_count == APM_NEVENTS)
894 return 1; /* overflow */
895 if (sc->event_filter[event_type] == 0)
896 return 1; /* not registered */
897 evp = &sc->event_list[sc->event_ptr];
900 sc->event_ptr %= APM_NEVENTS;
901 evp->type = event_type;
902 evp->index = ++apm_evindex;
903 selwakeup(&sc->sc_rsel);
904 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
907 /* Process APM event */
909 apm_processevent(void)
912 struct apm_softc *sc = &apm_softc;
914 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
915 APM_DPRINT("Received APM Event: " #symbol "\n");
918 apm_event = apm_getevent();
920 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
921 if (apm_op_inprog == 0) {
923 if (apm_record_event(sc, apm_event)) {
924 apm_suspend(PMST_STANDBY);
928 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ);
929 if (apm_op_inprog == 0) {
931 if (apm_record_event(sc, apm_event)) {
932 apm_suspend(PMST_STANDBY);
936 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
937 apm_lastreq_notify();
938 if (apm_op_inprog == 0) {
940 if (apm_record_event(sc, apm_event)) {
944 return; /* XXX skip the rest */
945 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
946 apm_lastreq_notify();
947 if (apm_op_inprog == 0) {
949 if (apm_record_event(sc, apm_event)) {
953 return; /* XXX skip the rest */
954 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
957 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
958 apm_record_event(sc, apm_event);
961 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
962 apm_record_event(sc, apm_event);
965 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
966 apm_record_event(sc, apm_event);
969 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
970 if (apm_record_event(sc, apm_event)) {
972 apm_suspend(PMST_SUSPEND);
975 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
976 apm_record_event(sc, apm_event);
978 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
979 apm_record_event(sc, apm_event);
980 inittodr(0); /* adjust time to RTC */
982 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
983 apm_record_event(sc, apm_event);
988 printf("Unknown Original APM Event 0x%x\n", apm_event);
991 } while (apm_event != PMEV_NOEVENT);
997 * Initialize APM driver
1001 apm_attach(device_t dev)
1003 struct apm_softc *sc = &apm_softc;
1007 if (resource_int_value("apm", 0, "flags", &flags) != 0)
1010 sc->initialized = 0;
1012 /* Must be externally enabled */
1015 /* Always call HLT in idle loop */
1016 sc->always_halt_cpu = 1;
1018 kgetenv_int("debug.apm_debug", &apm_debug);
1020 /* print bootstrap messages */
1021 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version);
1022 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n",
1023 sc->bios.seg.code16.base, sc->bios.seg.data.base);
1024 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
1025 sc->bios.entry, is_enabled(sc->slow_idle_cpu),
1026 is_enabled(!sc->disabled));
1027 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n",
1028 sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
1031 * In one test, apm bios version was 1.02; an attempt to register
1032 * a 1.04 driver resulted in a 1.00 connection! Registering a
1033 * 1.02 driver resulted in a 1.02 connection.
1035 drv_version = apm_version > 0x102 ? 0x102 : apm_version;
1036 for (; drv_version > 0x100; drv_version--)
1037 if (apm_driver_version(drv_version) == 0)
1039 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 +
1040 ((drv_version & 0x000f) >> 0);
1041 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
1042 ((apm_version & 0x0f00) >> 8);
1044 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
1046 if (sc->intversion >= INTVERSION(1, 1))
1047 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
1048 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n",
1049 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
1050 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
1051 sc->majorversion, sc->minorversion);
1054 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
1055 /* enable power management */
1057 if (apm_enable_disable_pm(1)) {
1058 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n",
1059 (sc->bios.r.eax >> 8) & 0xff);
1063 /* engage power managment (APM 1.1 or later) */
1064 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
1065 if (apm_engage_disengage_pm(1)) {
1066 APM_DPRINT("apm: *Warning* engage function failed err=[%x]",
1067 (sc->bios.r.eax >> 8) & 0xff);
1068 APM_DPRINT(" (Docked or using external power?).\n");
1072 /* default suspend hook */
1073 sc->sc_suspend.ah_fun = apm_default_suspend;
1074 sc->sc_suspend.ah_arg = sc;
1075 sc->sc_suspend.ah_name = "default suspend";
1076 sc->sc_suspend.ah_order = APM_MAX_ORDER;
1078 /* default resume hook */
1079 sc->sc_resume.ah_fun = apm_default_resume;
1080 sc->sc_resume.ah_arg = sc;
1081 sc->sc_resume.ah_name = "default resume";
1082 sc->sc_resume.ah_order = APM_MIN_ORDER;
1084 apm_hook_establish(APM_HOOK_SUSPEND, &sc->sc_suspend);
1085 apm_hook_establish(APM_HOOK_RESUME , &sc->sc_resume);
1087 /* Power the system off using APM */
1088 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL,
1091 sc->initialized = 1;
1093 dev_ops_add(&apm_ops, 0, 0);
1094 make_dev(&apm_ops, 0, UID_ROOT, GID_OPERATOR, 0660, "apm");
1095 make_dev(&apm_ops, 8, UID_ROOT, GID_OPERATOR, 0660, "apmctl");
1100 apmopen(struct dev_open_args *ap)
1102 cdev_t dev = ap->a_head.a_dev;
1103 struct apm_softc *sc = &apm_softc;
1104 int ctl = APMDEV(dev);
1106 if (!sc->initialized)
1111 if (!(ap->a_oflags & FWRITE))
1113 if (sc->sc_flags & SCFLAG_OCTL)
1115 sc->sc_flags |= SCFLAG_OCTL;
1116 bzero(sc->event_filter, sizeof sc->event_filter);
1119 sc->sc_flags |= SCFLAG_ONORMAL;
1129 apmclose(struct dev_close_args *ap)
1131 cdev_t dev = ap->a_head.a_dev;
1132 struct apm_softc *sc = &apm_softc;
1133 int ctl = APMDEV(dev);
1137 apm_lastreq_rejected();
1138 sc->sc_flags &= ~SCFLAG_OCTL;
1139 bzero(sc->event_filter, sizeof sc->event_filter);
1142 sc->sc_flags &= ~SCFLAG_ONORMAL;
1145 if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
1146 sc->event_count = 0;
1153 apmioctl(struct dev_ioctl_args *ap)
1155 cdev_t dev = ap->a_head.a_dev;
1156 struct apm_softc *sc = &apm_softc;
1157 struct apm_bios_arg *args;
1162 if (!sc->initialized)
1164 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", ap->a_cmd);
1166 switch (ap->a_cmd) {
1168 if (!(ap->a_fflag & FWRITE))
1171 apm_suspend(PMST_SUSPEND);
1177 if (!(ap->a_fflag & FWRITE))
1180 apm_suspend(PMST_STANDBY);
1185 case APMIO_GETINFO_OLD:
1187 struct apm_info info;
1188 apm_info_old_t aiop;
1190 if (apm_get_info(&info))
1192 aiop = (apm_info_old_t)ap->a_data;
1193 aiop->ai_major = info.ai_major;
1194 aiop->ai_minor = info.ai_minor;
1195 aiop->ai_acline = info.ai_acline;
1196 aiop->ai_batt_stat = info.ai_batt_stat;
1197 aiop->ai_batt_life = info.ai_batt_life;
1198 aiop->ai_status = info.ai_status;
1202 if (apm_get_info((apm_info_t)ap->a_data))
1205 case APMIO_GETPWSTATUS:
1206 if (apm_get_pwstatus((apm_pwstatus_t)ap->a_data))
1210 if (!(ap->a_fflag & FWRITE))
1215 if (!(ap->a_fflag & FWRITE))
1217 apm_event_disable();
1220 if (!(ap->a_fflag & FWRITE))
1224 case APMIO_NOTHALTCPU:
1225 if (!(ap->a_fflag & FWRITE))
1230 if (!(ap->a_fflag & FWRITE))
1232 newstate = *(int *)ap->a_data;
1233 if (apm_display(newstate))
1237 if (!(ap->a_fflag & FWRITE))
1239 /* XXX compatibility with the old interface */
1240 args = (struct apm_bios_arg *)ap->a_data;
1241 sc->bios.r.eax = args->eax;
1242 sc->bios.r.ebx = args->ebx;
1243 sc->bios.r.ecx = args->ecx;
1244 sc->bios.r.edx = args->edx;
1245 sc->bios.r.esi = args->esi;
1246 sc->bios.r.edi = args->edi;
1247 if ((ret = apm_bioscall())) {
1249 * Return code 1 means bios call was unsuccessful.
1250 * Error code is stored in %ah.
1251 * Return code -1 means bios call was unsupported
1252 * in the APM BIOS version.
1259 * Return code 0 means bios call was successful.
1260 * We need only %al and can discard %ah.
1262 sc->bios.r.eax &= 0xff;
1264 args->eax = sc->bios.r.eax;
1265 args->ebx = sc->bios.r.ebx;
1266 args->ecx = sc->bios.r.ecx;
1267 args->edx = sc->bios.r.edx;
1268 args->esi = sc->bios.r.esi;
1269 args->edi = sc->bios.r.edi;
1276 /* for /dev/apmctl */
1277 if (APMDEV(dev) == APMDEV_CTL) {
1278 struct apm_event_info *evp;
1282 switch (ap->a_cmd) {
1283 case APMIO_NEXTEVENT:
1284 if (!sc->event_count) {
1287 evp = (struct apm_event_info *)ap->a_data;
1288 i = sc->event_ptr + APM_NEVENTS - sc->event_count;
1290 *evp = sc->event_list[i];
1294 case APMIO_REJECTLASTREQ:
1295 if (apm_lastreq_rejected()) {
1309 apmwrite(struct dev_write_args *ap)
1311 cdev_t dev = ap->a_head.a_dev;
1312 struct uio *uio = ap->a_uio;
1313 struct apm_softc *sc = &apm_softc;
1318 if (APMDEV(dev) != APMDEV_CTL)
1320 if (uio->uio_resid != sizeof(u_int))
1323 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
1326 if (event_type < 0 || event_type >= APM_NPMEV)
1329 if (sc->event_filter[event_type] == 0) {
1334 sc->event_filter[event_type] = enabled;
1335 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
1337 return uio->uio_resid;
1341 apmpoll(struct dev_poll_args *ap)
1343 struct apm_softc *sc = &apm_softc;
1346 if (ap->a_events & (POLLIN | POLLRDNORM)) {
1347 if (sc->event_count) {
1348 revents |= ap->a_events & (POLLIN | POLLRDNORM);
1350 selrecord(curthread, &sc->sc_rsel);
1353 ap->a_events = revents;
1358 * Because apm is a static device that always exists under any attached
1359 * isa device, and not scanned by the isa device, we need an identify
1360 * function to install the device so we can probe for it.
1362 static device_method_t apm_methods[] = {
1363 /* Device interface */
1364 DEVMETHOD(device_identify, bus_generic_identify),
1365 DEVMETHOD(device_probe, apm_probe),
1366 DEVMETHOD(device_attach, apm_attach),
1371 static driver_t apm_driver = {
1374 1, /* no softc (XXX) */
1377 static devclass_t apm_devclass;
1379 DRIVER_MODULE(apm, nexus, apm_driver, apm_devclass, 0, 0);