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)
19 #include <sys/cdefs.h>
20 __FBSDID("$FreeBSD$");
22 #include <sys/param.h>
23 #include <sys/systm.h>
26 #include <sys/condvar.h>
27 #include <sys/eventhandler.h>
28 #include <sys/fcntl.h>
29 #include <sys/kernel.h>
30 #include <sys/kthread.h>
32 #include <sys/module.h>
33 #include <sys/mutex.h>
35 #include <sys/power.h>
36 #include <sys/reboot.h>
37 #include <sys/selinfo.h>
38 #include <sys/signalvar.h>
39 #include <sys/sysctl.h>
40 #include <sys/syslog.h>
44 #include <machine/apm_bios.h>
45 #include <machine/clock.h>
46 #include <machine/endian.h>
47 #include <machine/pc/bios.h>
48 #include <machine/cpufunc.h>
49 #include <machine/segments.h>
50 #include <machine/stdarg.h>
51 #include <machine/vm86.h>
53 #include <machine/bus.h>
54 #include <machine/resource.h>
59 #include <vm/vm_param.h>
61 #include <i386/bios/apm.h>
64 /* Used by the apm_saver screen saver module */
65 int apm_display(int newstate);
66 struct apm_softc apm_softc;
68 static void apm_resume(void);
69 static int apm_bioscall(void);
70 static int apm_check_function_supported(u_int version, u_int func);
72 static int apm_pm_func(u_long, void*, ...);
74 static u_long apm_version;
78 #define SCFLAG_ONORMAL 0x0000001
79 #define SCFLAG_OCTL 0x0000002
80 #define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL)
82 #define APMDEV_NORMAL 0
86 extern int bios32_apm98(struct bios_regs *, u_int, u_short);
88 /* PC98's SMM definition */
89 #define APM_NECSMM_PORT 0x6b8e
90 #define APM_NECSMM_PORTSZ 1
91 #define APM_NECSMM_EN 0x10
92 static __inline void apm_enable_smm(struct apm_softc *);
93 static __inline void apm_disable_smm(struct apm_softc *);
95 u_int32_t apm_necsmm_mask;
98 static struct apmhook *hook[NAPM_HOOK]; /* XXX */
100 #define is_enabled(foo) ((foo) ? "enabled" : "disabled")
102 /* Map version number to integer (keeps ordering of version numbers) */
103 #define INTVERSION(major, minor) ((major)*100 + (minor))
105 static d_open_t apmopen;
106 static d_close_t apmclose;
107 static d_write_t apmwrite;
108 static d_ioctl_t apmioctl;
109 static d_poll_t apmpoll;
111 static struct cdevsw apm_cdevsw = {
112 .d_version = D_VERSION,
113 .d_flags = D_NEEDGIANT,
122 static int apm_suspend_delay = 1;
123 static int apm_standby_delay = 1;
124 static int apm_swab_batt_minutes = 0;
125 static int apm_debug = 0;
127 #define APM_DPRINT(args...) do { \
133 SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, "");
134 SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, "");
135 SYSCTL_INT(_debug, OID_AUTO, apm_debug, CTLFLAG_RW, &apm_debug, 0, "");
137 SYSCTL_INT(_machdep, OID_AUTO, apm_swab_batt_minutes, CTLFLAG_RWTUN,
138 &apm_swab_batt_minutes, 0, "Byte swap battery time value.");
143 struct apm_softc *sc;
145 bus_space_tag_t iot = sc->sc_iot;
146 bus_space_handle_t ioh = sc->sc_ioh;
147 if (apm_necsmm_addr != 0)
148 bus_space_write_1(iot, ioh, 0,
149 (bus_space_read_1(iot, ioh, 0) | ~apm_necsmm_mask));
154 struct apm_softc *sc;
156 bus_space_tag_t iot = sc->sc_iot;
157 bus_space_handle_t ioh = sc->sc_ioh;
158 if (apm_necsmm_addr != 0)
159 bus_space_write_1(iot, ioh, 0,
160 (bus_space_read_1(iot, ioh, 0) & apm_necsmm_mask));
165 * return 0 if the function successfull,
166 * return 1 if the function unsuccessfull,
167 * return -1 if the function unsupported.
172 struct apm_softc *sc = &apm_softc;
174 u_int apm_func = sc->bios.r.eax & 0xff;
176 if (!apm_check_function_supported(sc->intversion, apm_func)) {
177 APM_DPRINT("apm_bioscall: function 0x%x is not supported in v%d.%d\n",
178 apm_func, sc->majorversion, sc->minorversion);
184 set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG);
185 if (bios32_apm98(&sc->bios.r, sc->bios.entry,
186 GSEL(GBIOSCODE32_SEL, SEL_KPL)) != 0)
189 if (sc->connectmode == APM_PROT32CONNECT) {
190 set_bios_selectors(&sc->bios.seg,
191 BIOSCODE_FLAG | BIOSDATA_FLAG);
192 errno = bios32(&sc->bios.r,
193 sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL));
195 errno = bios16(&sc->bios, NULL);
202 /* check whether APM function is supported (1) or not (0). */
204 apm_check_function_supported(u_int version, u_int func)
206 /* except driver version */
207 if (func == APM_DRVVERSION) {
211 if (func == APM_GETPWSTATUS) {
217 case INTVERSION(1, 0):
218 if (func > APM_GETPMEVENT) {
219 return (0); /* not supported */
222 case INTVERSION(1, 1):
223 if (func > APM_ENGAGEDISENGAGEPM &&
224 func < APM_OEMFUNC) {
225 return (0); /* not supported */
228 case INTVERSION(1, 2):
232 return (1); /* supported */
235 /* enable/disable power management */
237 apm_enable_disable_pm(int enable)
239 struct apm_softc *sc = &apm_softc;
241 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM;
243 if (sc->intversion >= INTVERSION(1, 1))
244 sc->bios.r.ebx = PMDV_ALLDEV;
246 sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */
247 sc->bios.r.ecx = enable;
249 return (apm_bioscall());
252 /* register driver version (APM 1.1 or later) */
254 apm_driver_version(int version)
256 struct apm_softc *sc = &apm_softc;
258 sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION;
259 sc->bios.r.ebx = 0x0;
260 sc->bios.r.ecx = version;
263 if (apm_bioscall() == 0 && sc->bios.r.eax == version)
266 /* Some old BIOSes don't return the connection version in %ax. */
267 if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION))
273 /* engage/disengage power management (APM 1.1 or later) */
275 apm_engage_disengage_pm(int engage)
277 struct apm_softc *sc = &apm_softc;
279 sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM;
280 sc->bios.r.ebx = PMDV_ALLDEV;
281 sc->bios.r.ecx = engage;
283 return (apm_bioscall());
290 struct apm_softc *sc = &apm_softc;
292 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT;
298 return (PMEV_NOEVENT);
299 return (sc->bios.r.ebx & 0xffff);
302 /* suspend entire system */
304 apm_suspend_system(int state)
306 struct apm_softc *sc = &apm_softc;
308 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
309 sc->bios.r.ebx = PMDV_ALLDEV;
310 sc->bios.r.ecx = state;
316 if (apm_bioscall()) {
317 printf("Entire system suspend failure: errcode = %d\n",
318 0xff & (sc->bios.r.eax >> 8));
327 /* Display control */
329 * Experimental implementation: My laptop machine can't handle this function
330 * If your laptop can control the display via APM, please inform me.
331 * HOSOKAWA, Tatsumi <hosokawa@jp.FreeBSD.org>
334 apm_display(int newstate)
336 struct apm_softc *sc = &apm_softc;
338 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
339 sc->bios.r.ebx = PMDV_DISP0;
340 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
342 if (apm_bioscall() == 0) {
346 /* If failed, then try to blank all display devices instead. */
347 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
348 sc->bios.r.ebx = PMDV_DISPALL; /* all display devices */
349 sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND;
351 if (apm_bioscall() == 0) {
354 printf("Display off failure: errcode = %d\n",
355 0xff & (sc->bios.r.eax >> 8));
360 * Turn off the entire system.
363 apm_power_off(void *junk, int howto)
365 struct apm_softc *sc = &apm_softc;
367 /* Not halting powering off, or not active */
368 if (!(howto & RB_POWEROFF) || !apm_softc.active)
370 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
371 sc->bios.r.ebx = PMDV_ALLDEV;
372 sc->bios.r.ecx = PMST_OFF;
374 (void) apm_bioscall();
377 /* APM Battery low handler */
379 apm_battery_low(void)
381 printf("\007\007 * * * BATTERY IS LOW * * * \007\007");
384 /* APM hook manager */
385 static struct apmhook *
386 apm_add_hook(struct apmhook **list, struct apmhook *ah)
389 struct apmhook *p, *prev;
391 APM_DPRINT("Add hook \"%s\"\n", ah->ah_name);
395 panic("illegal apm_hook!");
397 for (p = *list; p != NULL; prev = p, p = p->ah_next)
398 if (p->ah_order > ah->ah_order)
405 ah->ah_next = prev->ah_next;
413 apm_del_hook(struct apmhook **list, struct apmhook *ah)
416 struct apmhook *p, *prev;
420 for (p = *list; p != NULL; prev = p, p = p->ah_next)
423 panic("Tried to delete unregistered apm_hook.");
427 prev->ah_next = p->ah_next;
435 /* APM driver calls some functions automatically */
437 apm_execute_hook(struct apmhook *list)
441 for (p = list; p != NULL; p = p->ah_next) {
442 APM_DPRINT("Execute APM hook \"%s.\"\n", p->ah_name);
443 if ((*(p->ah_fun))(p->ah_arg))
444 printf("Warning: APM hook \"%s\" failed", p->ah_name);
449 /* establish an apm hook */
451 apm_hook_establish(int apmh, struct apmhook *ah)
453 if (apmh < 0 || apmh >= NAPM_HOOK)
456 return apm_add_hook(&hook[apmh], ah);
459 /* disestablish an apm hook */
461 apm_hook_disestablish(int apmh, struct apmhook *ah)
463 if (apmh < 0 || apmh >= NAPM_HOOK)
466 apm_del_hook(&hook[apmh], ah);
469 static int apm_record_event(struct apm_softc *, u_int);
470 static void apm_processevent(void);
472 static u_int apm_op_inprog = 0;
477 struct apm_softc *sc = &apm_softc;
480 if (sc == NULL || sc->initialized == 0)
484 sc->suspends = sc->suspend_countdown = 0;
486 EVENTHANDLER_INVOKE(power_suspend);
489 * Be sure to hold Giant across DEVICE_SUSPEND/RESUME since
490 * non-MPSAFE drivers need this.
493 error = DEVICE_SUSPEND(root_bus);
497 apm_execute_hook(hook[APM_HOOK_SUSPEND]);
498 if (apm_suspend_system(PMST_SUSPEND) == 0) {
505 /* Failure, 'resume' the system again */
506 apm_execute_hook(hook[APM_HOOK_RESUME]);
507 DEVICE_RESUME(root_bus);
510 EVENTHANDLER_INVOKE(power_resume);
516 struct apm_softc *sc = &apm_softc;
518 if (sc == NULL || sc->initialized == 0)
522 sc->standbys = sc->standby_countdown = 0;
525 * As far as standby, we don't need to execute
526 * all of suspend hooks.
528 if (apm_suspend_system(PMST_STANDBY) == 0)
534 apm_lastreq_notify(void)
536 struct apm_softc *sc = &apm_softc;
538 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
539 sc->bios.r.ebx = PMDV_ALLDEV;
540 sc->bios.r.ecx = PMST_LASTREQNOTIFY;
546 apm_lastreq_rejected(void)
548 struct apm_softc *sc = &apm_softc;
550 if (apm_op_inprog == 0) {
551 return 1; /* no operation in progress */
554 sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE;
555 sc->bios.r.ebx = PMDV_ALLDEV;
556 sc->bios.r.ecx = PMST_LASTREQREJECT;
559 if (apm_bioscall()) {
560 APM_DPRINT("apm_lastreq_rejected: failed\n");
568 * Public interface to the suspend/resume:
570 * Execute suspend and resume hook before and after sleep, respectively.
575 apm_suspend(int state)
577 struct apm_softc *sc = &apm_softc;
579 if (sc == NULL || sc->initialized == 0)
587 sc->suspend_countdown = apm_suspend_delay;
593 sc->standby_countdown = apm_standby_delay;
596 printf("apm_suspend: Unknown Suspend state 0x%x\n", state);
601 apm_lastreq_notify();
607 struct apm_softc *sc = &apm_softc;
609 if (sc == NULL || sc->initialized == 0 || sc->suspending == 0)
613 apm_execute_hook(hook[APM_HOOK_RESUME]);
615 DEVICE_RESUME(root_bus);
617 EVENTHANDLER_INVOKE(power_resume);
621 /* get power status per battery */
623 apm_get_pwstatus(apm_pwstatus_t app)
625 struct apm_softc *sc = &apm_softc;
627 if (app->ap_device != PMDV_ALLDEV &&
628 (app->ap_device < PMDV_BATT0 || app->ap_device > PMDV_BATT_ALL))
631 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS;
632 sc->bios.r.ebx = app->ap_device;
634 sc->bios.r.edx = 0xffff; /* default to unknown battery time */
639 app->ap_acline = (sc->bios.r.ebx >> 8) & 0xff;
640 app->ap_batt_stat = sc->bios.r.ebx & 0xff;
641 app->ap_batt_flag = (sc->bios.r.ecx >> 8) & 0xff;
642 app->ap_batt_life = sc->bios.r.ecx & 0xff;
643 sc->bios.r.edx &= 0xffff;
644 if (apm_swab_batt_minutes)
645 sc->bios.r.edx = __bswap16(sc->bios.r.edx) | 0x8000;
646 if (sc->bios.r.edx == 0xffff) /* Time is unknown */
647 app->ap_batt_time = -1;
648 else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */
649 app->ap_batt_time = (sc->bios.r.edx & 0x7fff) * 60;
650 else /* Time is in seconds */
651 app->ap_batt_time = sc->bios.r.edx;
657 /* get APM information */
659 apm_get_info(apm_info_t aip)
661 struct apm_softc *sc = &apm_softc;
662 struct apm_pwstatus aps;
664 bzero(&aps, sizeof(aps));
665 aps.ap_device = PMDV_ALLDEV;
666 if (apm_get_pwstatus(&aps))
669 aip->ai_infoversion = 1;
670 aip->ai_acline = aps.ap_acline;
671 aip->ai_batt_stat = aps.ap_batt_stat;
672 aip->ai_batt_life = aps.ap_batt_life;
673 aip->ai_batt_time = aps.ap_batt_time;
674 aip->ai_major = (u_int)sc->majorversion;
675 aip->ai_minor = (u_int)sc->minorversion;
676 aip->ai_status = (u_int)sc->active;
678 sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES;
682 if (apm_bioscall()) {
683 aip->ai_batteries = 0xffffffff; /* Unknown */
684 aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */
686 aip->ai_batteries = sc->bios.r.ebx & 0xff;
687 aip->ai_capabilities = sc->bios.r.ecx & 0xff;
690 bzero(aip->ai_spare, sizeof aip->ai_spare);
696 /* inform APM BIOS that CPU is idle */
700 struct apm_softc *sc = &apm_softc;
704 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE;
705 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
706 (void) apm_bioscall();
709 * Some APM implementation halts CPU in BIOS, whenever
710 * "CPU-idle" function are invoked, but swtch() of
711 * FreeBSD halts CPU, therefore, CPU is halted twice
712 * in the sched loop. It makes the interrupt latency
713 * terribly long and be able to cause a serious problem
714 * in interrupt processing. We prevent it by removing
715 * "hlt" operation from swtch() and managed it under
718 if (!sc->active || sc->always_halt_cpu)
719 halt(); /* wait for interrupt */
722 /* inform APM BIOS that CPU is busy */
726 struct apm_softc *sc = &apm_softc;
729 * The APM specification says this is only necessary if your BIOS
730 * slows down the processor in the idle task, otherwise it's not
733 if (sc->slow_idle_cpu && sc->active) {
735 sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY;
736 sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0;
745 * This routine wakes up from time to time to deal with delaying the
746 * suspend of the system, or other events.
749 apm_event_thread(void *arg)
751 struct apm_softc *sc = &apm_softc;
756 apm_lastreq_notify();
757 if (sc->standbys && sc->standby_countdown-- <= 0)
759 if (sc->suspends && sc->suspend_countdown-- <= 0)
764 cv_timedwait(&sc->cv, &sc->mtx, 10 * hz / 9);
765 mtx_unlock(&sc->mtx);
771 /* enable APM BIOS */
773 apm_event_enable(void)
775 struct apm_softc *sc = &apm_softc;
777 APM_DPRINT("called apm_event_enable()\n");
779 if (sc == NULL || sc->initialized == 0)
782 /* Start the thread */
784 if (kproc_create(apm_event_thread, sc, &sc->event_thread, 0, 0,
786 panic("Cannot create apm worker thread");
791 /* disable APM BIOS */
793 apm_event_disable(void)
795 struct apm_softc *sc = &apm_softc;
797 APM_DPRINT("called apm_event_disable()\n");
799 if (sc == NULL || sc->initialized == 0)
804 while (sc->running) {
805 cv_broadcast(&sc->cv);
806 msleep(sc->event_thread, &sc->mtx, PWAIT, "apmdie", 0);
808 mtx_unlock(&sc->mtx);
809 sc->event_thread = NULL;
813 /* halt CPU in scheduling loop */
817 struct apm_softc *sc = &apm_softc;
819 if (sc == NULL || sc->initialized == 0)
822 sc->always_halt_cpu = 1;
827 /* don't halt CPU in scheduling loop */
829 apm_not_halt_cpu(void)
831 struct apm_softc *sc = &apm_softc;
833 if (sc == NULL || sc->initialized == 0)
836 sc->always_halt_cpu = 0;
841 /* device driver definitions */
848 apm_modevent(struct module *mod, int event, void *junk)
857 if (!cold && power_pm_get_type() == POWER_PM_TYPE_APM)
868 * Create "connection point"
871 apm_identify(driver_t *driver, device_t parent)
876 printf("Don't load this driver from userland!!\n");
880 if (resource_disabled("apm", 0))
883 child = BUS_ADD_CHILD(parent, 0, "apm", 0);
885 panic("apm_identify");
892 apm_probe(device_t dev)
894 #define APM_KERNBASE KERNBASE
895 struct vm86frame vmf;
896 struct apm_softc *sc = &apm_softc;
901 device_set_desc(dev, "APM BIOS");
902 if (device_get_unit(dev) > 0) {
903 printf("apm: Only one APM driver supported.\n");
907 if (power_pm_get_type() != POWER_PM_TYPE_NONE &&
908 power_pm_get_type() != POWER_PM_TYPE_APM) {
909 printf("apm: Other PM system enabled.\n");
913 bzero(&vmf, sizeof(struct vm86frame)); /* safety */
914 bzero(&apm_softc, sizeof(apm_softc));
915 vmf.vmf_ah = APM_BIOS;
916 vmf.vmf_al = APM_INSTCHECK;
918 if (vm86_intcall(APM_INT, &vmf))
919 return ENXIO; /* APM not found */
920 if (vmf.vmf_bx != 0x504d) {
921 printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx);
924 if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) {
925 printf("apm: protected mode connections are not supported\n");
929 apm_version = vmf.vmf_ax;
930 sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0);
931 sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0);
932 sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0);
934 vmf.vmf_ah = APM_BIOS;
935 vmf.vmf_al = APM_DISCONNECT;
937 vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */
940 /* PC98 have bogos APM 32bit BIOS */
941 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) == 0)
944 bus_set_resource(dev, SYS_RES_IOPORT, rid,
945 APM_NECSMM_PORT, APM_NECSMM_PORTSZ);
946 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
947 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
948 if (sc->sc_res == NULL) {
949 printf("apm: cannot open NEC smm device\n");
952 bus_release_resource(dev, SYS_RES_IOPORT, rid, sc->sc_res);
954 vmf.vmf_ah = APM_BIOS;
955 vmf.vmf_al = APM_PROT32CONNECT;
957 if (vm86_intcall(APM_INT, &vmf)) {
958 printf("apm: 32-bit connection error.\n");
962 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
963 sc->bios.seg.code32.limit = 0xffff;
964 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
965 sc->bios.seg.code16.limit = 0xffff;
966 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
967 sc->bios.seg.data.limit = 0xffff;
968 sc->bios.entry = vmf.vmf_ebx;
969 sc->connectmode = APM_PROT32CONNECT;
971 if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) {
972 vmf.vmf_ah = APM_BIOS;
973 vmf.vmf_al = APM_PROT32CONNECT;
975 if (vm86_intcall(APM_INT, &vmf)) {
976 printf("apm: 32-bit connection error.\n");
979 sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
980 sc->bios.seg.code32.limit = 0xffff;
981 sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
982 sc->bios.seg.code16.limit = 0xffff;
983 sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE;
984 sc->bios.seg.data.limit = 0xffff;
985 sc->bios.entry = vmf.vmf_ebx;
986 sc->connectmode = APM_PROT32CONNECT;
988 /* use 16-bit connection */
989 vmf.vmf_ah = APM_BIOS;
990 vmf.vmf_al = APM_PROT16CONNECT;
992 if (vm86_intcall(APM_INT, &vmf)) {
993 printf("apm: 16-bit connection error.\n");
996 sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE;
997 sc->bios.seg.code16.limit = 0xffff;
998 sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE;
999 sc->bios.seg.data.limit = 0xffff;
1000 sc->bios.entry = vmf.vmf_bx;
1001 sc->connectmode = APM_PROT16CONNECT;
1009 * return 0 if the user will notice and handle the event,
1010 * return 1 if the kernel driver should do so.
1013 apm_record_event(struct apm_softc *sc, u_int event_type)
1015 struct apm_event_info *evp;
1017 if ((sc->sc_flags & SCFLAG_OPEN) == 0)
1018 return 1; /* no user waiting */
1019 if (sc->event_count == APM_NEVENTS)
1020 return 1; /* overflow */
1021 if (sc->event_filter[event_type] == 0)
1022 return 1; /* not registered */
1023 evp = &sc->event_list[sc->event_ptr];
1026 sc->event_ptr %= APM_NEVENTS;
1027 evp->type = event_type;
1028 evp->index = ++apm_evindex;
1029 selwakeuppri(&sc->sc_rsel, PZERO);
1030 return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */
1035 apm_power_profile(struct apm_softc *sc)
1038 struct apm_info info;
1039 static int apm_acline = 0;
1041 if (apm_get_info(&info))
1044 if (apm_acline != info.ai_acline) {
1045 apm_acline = info.ai_acline;
1046 state = apm_acline ? POWER_PROFILE_PERFORMANCE : POWER_PROFILE_ECONOMY;
1047 power_profile_set_state(state);
1051 /* Process APM event */
1053 apm_processevent(void)
1056 struct apm_softc *sc = &apm_softc;
1058 #define OPMEV_DEBUGMESSAGE(symbol) case symbol: \
1059 APM_DPRINT("Received APM Event: " #symbol "\n");
1062 apm_event = apm_getevent();
1063 switch (apm_event) {
1064 OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ);
1065 if (apm_op_inprog == 0) {
1067 if (apm_record_event(sc, apm_event)) {
1068 apm_suspend(PMST_STANDBY);
1072 OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ);
1073 if (apm_op_inprog == 0) {
1075 if (apm_record_event(sc, apm_event)) {
1076 apm_suspend(PMST_STANDBY);
1080 OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ);
1081 apm_lastreq_notify();
1082 if (apm_op_inprog == 0) {
1084 if (apm_record_event(sc, apm_event)) {
1088 return; /* XXX skip the rest */
1089 OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ);
1090 apm_lastreq_notify();
1091 if (apm_op_inprog == 0) {
1093 if (apm_record_event(sc, apm_event)) {
1097 return; /* XXX skip the rest */
1098 OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND);
1101 OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME);
1102 apm_record_event(sc, apm_event);
1105 OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME);
1106 apm_record_event(sc, apm_event);
1109 OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME);
1110 apm_record_event(sc, apm_event);
1112 OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW);
1113 if (apm_record_event(sc, apm_event)) {
1115 apm_suspend(PMST_SUSPEND);
1118 OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE);
1119 apm_record_event(sc, apm_event);
1120 apm_power_profile(sc);
1122 OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME);
1123 apm_record_event(sc, apm_event);
1124 inittodr(0); /* adjust time to RTC */
1126 OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE);
1127 apm_record_event(sc, apm_event);
1128 apm_power_profile(sc);
1133 printf("Unknown Original APM Event 0x%x\n", apm_event);
1136 } while (apm_event != PMEV_NOEVENT);
1138 apm_disable_smm(sc);
1145 * Initialize APM driver
1149 apm_attach(device_t dev)
1151 struct apm_softc *sc = &apm_softc;
1156 mtx_init(&sc->mtx, device_get_nameunit(dev), "apm", MTX_DEF);
1157 cv_init(&sc->cv, "cbb cv");
1160 if (device_get_flags(dev) & 0x20)
1161 atrtcclock_disable = 1;
1164 sc->initialized = 0;
1166 /* Must be externally enabled */
1169 /* Always call HLT in idle loop */
1170 sc->always_halt_cpu = 1;
1172 getenv_int("debug.apm_debug", &apm_debug);
1174 /* print bootstrap messages */
1175 APM_DPRINT("apm: APM BIOS version %04lx\n", apm_version);
1176 APM_DPRINT("apm: Code16 0x%08x, Data 0x%08x\n",
1177 sc->bios.seg.code16.base, sc->bios.seg.data.base);
1178 APM_DPRINT("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n",
1179 sc->bios.entry, is_enabled(sc->slow_idle_cpu),
1180 is_enabled(!sc->disabled));
1181 APM_DPRINT("apm: CS_limit=0x%x, DS_limit=0x%x\n",
1182 sc->bios.seg.code16.limit, sc->bios.seg.data.limit);
1186 sc->sc_res = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid,
1187 APM_NECSMM_PORT, ~0, APM_NECSMM_PORTSZ, RF_ACTIVE);
1188 if (sc->sc_res == NULL)
1189 panic("%s: counldn't map I/O ports", device_get_name(dev));
1190 sc->sc_iot = rman_get_bustag(sc->sc_res);
1191 sc->sc_ioh = rman_get_bushandle(sc->sc_res);
1193 if (apm_version==0x112 || apm_version==0x111 || apm_version==0x110)
1194 apm_necsmm_addr = APM_NECSMM_PORT;
1196 apm_necsmm_addr = 0;
1197 apm_necsmm_mask = ~APM_NECSMM_EN;
1201 * In one test, apm bios version was 1.02; an attempt to register
1202 * a 1.04 driver resulted in a 1.00 connection! Registering a
1203 * 1.02 driver resulted in a 1.02 connection.
1205 drv_version = apm_version > 0x102 ? 0x102 : apm_version;
1206 for (; drv_version > 0x100; drv_version--)
1207 if (apm_driver_version(drv_version) == 0)
1209 sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 +
1210 ((drv_version & 0x000f) >> 0);
1211 sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 +
1212 ((apm_version & 0x0f00) >> 8);
1214 sc->intversion = INTVERSION(sc->majorversion, sc->minorversion);
1216 if (sc->intversion >= INTVERSION(1, 1))
1217 APM_DPRINT("apm: Engaged control %s\n", is_enabled(!sc->disengaged));
1218 device_printf(dev, "found APM BIOS v%ld.%ld, connected at v%d.%d\n",
1219 ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8),
1220 ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0),
1221 sc->majorversion, sc->minorversion);
1224 APM_DPRINT("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu));
1225 /* enable power management */
1227 if (apm_enable_disable_pm(1)) {
1228 APM_DPRINT("apm: *Warning* enable function failed! [%x]\n",
1229 (sc->bios.r.eax >> 8) & 0xff);
1233 /* engage power managment (APM 1.1 or later) */
1234 if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) {
1235 if (apm_engage_disengage_pm(1)) {
1236 APM_DPRINT("apm: *Warning* engage function failed err=[%x]",
1237 (sc->bios.r.eax >> 8) & 0xff);
1238 APM_DPRINT(" (Docked or using external power?).\n");
1242 /* Power the system off using APM */
1243 EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL,
1246 /* Register APM again to pass the correct argument of pm_func. */
1247 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, sc);
1249 sc->initialized = 1;
1253 make_dev(&apm_cdevsw, APMDEV_NORMAL,
1254 UID_ROOT, GID_OPERATOR, 0664, "apm");
1255 make_dev(&apm_cdevsw, APMDEV_CTL,
1256 UID_ROOT, GID_OPERATOR, 0660, "apmctl");
1261 apmopen(struct cdev *dev, int flag, int fmt, struct thread *td)
1263 struct apm_softc *sc = &apm_softc;
1265 if (sc == NULL || sc->initialized == 0)
1268 switch (dev2unit(dev)) {
1270 if (!(flag & FWRITE))
1272 if (sc->sc_flags & SCFLAG_OCTL)
1274 sc->sc_flags |= SCFLAG_OCTL;
1275 bzero(sc->event_filter, sizeof sc->event_filter);
1278 sc->sc_flags |= SCFLAG_ONORMAL;
1285 apmclose(struct cdev *dev, int flag, int fmt, struct thread *td)
1287 struct apm_softc *sc = &apm_softc;
1289 switch (dev2unit(dev)) {
1291 apm_lastreq_rejected();
1292 sc->sc_flags &= ~SCFLAG_OCTL;
1293 bzero(sc->event_filter, sizeof sc->event_filter);
1296 sc->sc_flags &= ~SCFLAG_ONORMAL;
1299 if ((sc->sc_flags & SCFLAG_OPEN) == 0) {
1300 sc->event_count = 0;
1307 apmioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
1309 struct apm_softc *sc = &apm_softc;
1310 struct apm_bios_arg *args;
1315 if (sc == NULL || sc->initialized == 0)
1318 APM_DPRINT("APM ioctl: cmd = 0x%lx\n", cmd);
1321 if (!(flag & FWRITE))
1324 apm_suspend(PMST_SUSPEND);
1330 if (!(flag & FWRITE))
1333 apm_suspend(PMST_STANDBY);
1338 case APMIO_GETINFO_OLD:
1340 struct apm_info info;
1341 apm_info_old_t aiop;
1343 if (apm_get_info(&info))
1345 aiop = (apm_info_old_t)addr;
1346 aiop->ai_major = info.ai_major;
1347 aiop->ai_minor = info.ai_minor;
1348 aiop->ai_acline = info.ai_acline;
1349 aiop->ai_batt_stat = info.ai_batt_stat;
1350 aiop->ai_batt_life = info.ai_batt_life;
1351 aiop->ai_status = info.ai_status;
1355 if (apm_get_info((apm_info_t)addr))
1358 case APMIO_GETPWSTATUS:
1359 if (apm_get_pwstatus((apm_pwstatus_t)addr))
1363 if (!(flag & FWRITE))
1368 if (!(flag & FWRITE))
1370 apm_event_disable();
1373 if (!(flag & FWRITE))
1377 case APMIO_NOTHALTCPU:
1378 if (!(flag & FWRITE))
1383 if (!(flag & FWRITE))
1385 newstate = *(int *)addr;
1386 if (apm_display(newstate))
1390 if (!(flag & FWRITE))
1392 /* XXX compatibility with the old interface */
1393 args = (struct apm_bios_arg *)addr;
1395 if (((args->eax >> 8) & 0xff) == 0x53) {
1396 sc->bios.r.eax = args->eax & ~0xffff;
1397 sc->bios.r.eax |= APM_BIOS << 8;
1398 switch (args->eax & 0xff) {
1400 sc->bios.r.eax |= APM_GETPWSTATUS;
1403 sc->bios.r.eax |= APM_DRVVERSION;
1406 sc->bios.r.eax |= args->eax & 0xff;
1411 sc->bios.r.eax = args->eax;
1412 sc->bios.r.ebx = args->ebx;
1413 sc->bios.r.ecx = args->ecx;
1414 sc->bios.r.edx = args->edx;
1415 sc->bios.r.esi = args->esi;
1416 sc->bios.r.edi = args->edi;
1417 if ((ret = apm_bioscall())) {
1419 * Return code 1 means bios call was unsuccessful.
1420 * Error code is stored in %ah.
1421 * Return code -1 means bios call was unsupported
1422 * in the APM BIOS version.
1429 * Return code 0 means bios call was successful.
1430 * We need only %al and can discard %ah.
1432 sc->bios.r.eax &= 0xff;
1434 args->eax = sc->bios.r.eax;
1435 args->ebx = sc->bios.r.ebx;
1436 args->ecx = sc->bios.r.ecx;
1437 args->edx = sc->bios.r.edx;
1438 args->esi = sc->bios.r.esi;
1439 args->edi = sc->bios.r.edi;
1446 /* for /dev/apmctl */
1447 if (dev2unit(dev) == APMDEV_CTL) {
1448 struct apm_event_info *evp;
1453 case APMIO_NEXTEVENT:
1454 if (!sc->event_count) {
1457 evp = (struct apm_event_info *)addr;
1458 i = sc->event_ptr + APM_NEVENTS - sc->event_count;
1460 *evp = sc->event_list[i];
1464 case APMIO_REJECTLASTREQ:
1465 if (apm_lastreq_rejected()) {
1479 apmwrite(struct cdev *dev, struct uio *uio, int ioflag)
1481 struct apm_softc *sc = &apm_softc;
1486 if (dev2unit(dev) != APMDEV_CTL)
1488 if (uio->uio_resid != sizeof(u_int))
1491 if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio)))
1494 if (event_type < 0 || event_type >= APM_NPMEV)
1497 if (sc->event_filter[event_type] == 0) {
1502 sc->event_filter[event_type] = enabled;
1503 APM_DPRINT("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled));
1505 return uio->uio_resid;
1509 apmpoll(struct cdev *dev, int events, struct thread *td)
1511 struct apm_softc *sc = &apm_softc;
1514 if (events & (POLLIN | POLLRDNORM)) {
1515 if (sc->event_count) {
1516 revents |= events & (POLLIN | POLLRDNORM);
1518 selrecord(td, &sc->sc_rsel);
1525 static device_method_t apm_methods[] = {
1526 /* Device interface */
1527 DEVMETHOD(device_identify, apm_identify),
1528 DEVMETHOD(device_probe, apm_probe),
1529 DEVMETHOD(device_attach, apm_attach),
1534 static driver_t apm_driver = {
1537 1, /* no softc (XXX) */
1540 static devclass_t apm_devclass;
1542 DRIVER_MODULE(apm, legacy, apm_driver, apm_devclass, apm_modevent, 0);
1543 MODULE_VERSION(apm, 1);
1546 apm_pm_func(u_long cmd, void *arg, ...)
1548 int state, apm_state;
1554 case POWER_CMD_SUSPEND:
1556 state = va_arg(ap, int);
1560 case POWER_SLEEP_STATE_STANDBY:
1561 apm_state = PMST_STANDBY;
1563 case POWER_SLEEP_STATE_SUSPEND:
1564 case POWER_SLEEP_STATE_HIBERNATE:
1565 apm_state = PMST_SUSPEND;
1572 apm_suspend(apm_state);
1585 apm_pm_register(void *arg)
1588 if (!resource_disabled("apm", 0))
1589 power_pm_register(POWER_PM_TYPE_APM, apm_pm_func, NULL);
1592 SYSINIT(power, SI_SUB_KLD, SI_ORDER_ANY, apm_pm_register, 0);