/* * APM (Advanced Power Management) BIOS Device Driver * * Copyright (c) 1994 UKAI, Fumitoshi. * Copyright (c) 1994-1995 by HOSOKAWA, Tatsumi * Copyright (c) 1996 Nate Williams * Copyright (c) 1997 Poul-Henning Kamp * * This software may be used, modified, copied, and distributed, in * both source and binary form provided that the above copyright and * these terms are retained. Under no circumstances is the author * responsible for the proper functioning of this software, nor does * the author assume any responsibility for damages incurred with its * use. * * Sep, 1994 Implemented on FreeBSD 1.1.5.1R (Toshiba AVS001WD) * * $FreeBSD$ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* Used by the apm_saver screen saver module */ int apm_display __P((int newstate)); struct apm_softc apm_softc; static void apm_resume __P((void)); static int apm_bioscall(void); static int apm_check_function_supported __P((u_int version, u_int func)); static u_long apm_version; int apm_evindex; #define SCFLAG_ONORMAL 0x0000001 #define SCFLAG_OCTL 0x0000002 #define SCFLAG_OPEN (SCFLAG_ONORMAL|SCFLAG_OCTL) #define APMDEV(dev) (minor(dev)&0x0f) #define APMDEV_NORMAL 0 #define APMDEV_CTL 8 static struct apmhook *hook[NAPM_HOOK]; /* XXX */ #define is_enabled(foo) ((foo) ? "enabled" : "disabled") /* Map version number to integer (keeps ordering of version numbers) */ #define INTVERSION(major, minor) ((major)*100 + (minor)) static struct callout_handle apm_timeout_ch = CALLOUT_HANDLE_INITIALIZER(&apm_timeout_ch); static timeout_t apm_timeout; static d_open_t apmopen; static d_close_t apmclose; static d_write_t apmwrite; static d_ioctl_t apmioctl; static d_poll_t apmpoll; #define CDEV_MAJOR 39 static struct cdevsw apm_cdevsw = { /* open */ apmopen, /* close */ apmclose, /* read */ noread, /* write */ apmwrite, /* ioctl */ apmioctl, /* poll */ apmpoll, /* mmap */ nommap, /* strategy */ nostrategy, /* name */ "apm", /* maj */ CDEV_MAJOR, /* dump */ nodump, /* psize */ nopsize, /* flags */ 0, /* bmaj */ -1 }; static int apm_suspend_delay = 1; static int apm_standby_delay = 1; SYSCTL_INT(_machdep, OID_AUTO, apm_suspend_delay, CTLFLAG_RW, &apm_suspend_delay, 1, ""); SYSCTL_INT(_machdep, OID_AUTO, apm_standby_delay, CTLFLAG_RW, &apm_standby_delay, 1, ""); /* * return 0 if the function successfull, * return 1 if the function unsuccessfull, * return -1 if the function unsupported. */ static int apm_bioscall(void) { struct apm_softc *sc = &apm_softc; int errno = 0; u_int apm_func = sc->bios.r.eax & 0xff; if (!apm_check_function_supported(sc->intversion, apm_func)) { #ifdef APM_DEBUG printf("apm_bioscall: function 0x%x is not supported in v%d.%d\n", apm_func, sc->majorversion, sc->minorversion); #endif return (-1); } sc->bios_busy = 1; if (sc->connectmode == APM_PROT32CONNECT) { set_bios_selectors(&sc->bios.seg, BIOSCODE_FLAG | BIOSDATA_FLAG); errno = bios32(&sc->bios.r, sc->bios.entry, GSEL(GBIOSCODE32_SEL, SEL_KPL)); } else { errno = bios16(&sc->bios, NULL); } sc->bios_busy = 0; return (errno); } /* check whether APM function is supported (1) or not (0). */ static int apm_check_function_supported(u_int version, u_int func) { /* except driver version */ if (func == APM_DRVVERSION) { return (1); } switch (version) { case INTVERSION(1, 0): if (func > APM_GETPMEVENT) { return (0); /* not supported */ } break; case INTVERSION(1, 1): if (func > APM_ENGAGEDISENGAGEPM && func < APM_OEMFUNC) { return (0); /* not supported */ } break; case INTVERSION(1, 2): break; } return (1); /* supported */ } /* enable/disable power management */ static int apm_enable_disable_pm(int enable) { struct apm_softc *sc = &apm_softc; sc->bios.r.eax = (APM_BIOS << 8) | APM_ENABLEDISABLEPM; if (sc->intversion >= INTVERSION(1, 1)) sc->bios.r.ebx = PMDV_ALLDEV; else sc->bios.r.ebx = 0xffff; /* APM version 1.0 only */ sc->bios.r.ecx = enable; sc->bios.r.edx = 0; return (apm_bioscall()); } /* register driver version (APM 1.1 or later) */ static int apm_driver_version(int version) { struct apm_softc *sc = &apm_softc; sc->bios.r.eax = (APM_BIOS << 8) | APM_DRVVERSION; sc->bios.r.ebx = 0x0; sc->bios.r.ecx = version; sc->bios.r.edx = 0; if (apm_bioscall() == 0 && sc->bios.r.eax == version) return (0); /* Some old BIOSes don't return the connection version in %ax. */ if (sc->bios.r.eax == ((APM_BIOS << 8) | APM_DRVVERSION)) return (0); return (1); } /* engage/disengage power management (APM 1.1 or later) */ static int apm_engage_disengage_pm(int engage) { struct apm_softc *sc = &apm_softc; sc->bios.r.eax = (APM_BIOS << 8) | APM_ENGAGEDISENGAGEPM; sc->bios.r.ebx = PMDV_ALLDEV; sc->bios.r.ecx = engage; sc->bios.r.edx = 0; return (apm_bioscall()); } /* get PM event */ static u_int apm_getevent(void) { struct apm_softc *sc = &apm_softc; sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPMEVENT; sc->bios.r.ebx = 0; sc->bios.r.ecx = 0; sc->bios.r.edx = 0; if (apm_bioscall()) return (PMEV_NOEVENT); return (sc->bios.r.ebx & 0xffff); } /* suspend entire system */ static int apm_suspend_system(int state) { struct apm_softc *sc = &apm_softc; sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; sc->bios.r.ebx = PMDV_ALLDEV; sc->bios.r.ecx = state; sc->bios.r.edx = 0; if (apm_bioscall()) { printf("Entire system suspend failure: errcode = %d\n", 0xff & (sc->bios.r.eax >> 8)); return 1; } return 0; } /* Display control */ /* * Experimental implementation: My laptop machine can't handle this function * If your laptop can control the display via APM, please inform me. * HOSOKAWA, Tatsumi */ int apm_display(int newstate) { struct apm_softc *sc = &apm_softc; sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; sc->bios.r.ebx = PMDV_DISP0; sc->bios.r.ecx = newstate ? PMST_APMENABLED:PMST_SUSPEND; sc->bios.r.edx = 0; if (apm_bioscall()) { printf("Display off failure: errcode = %d\n", 0xff & (sc->bios.r.eax >> 8)); return 1; } return 0; } /* * Turn off the entire system. */ static void apm_power_off(void *junk, int howto) { struct apm_softc *sc = &apm_softc; /* Not halting powering off, or not active */ if (!(howto & RB_POWEROFF) || !apm_softc.active) return; sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; sc->bios.r.ebx = PMDV_ALLDEV; sc->bios.r.ecx = PMST_OFF; sc->bios.r.edx = 0; (void) apm_bioscall(); } /* APM Battery low handler */ static void apm_battery_low(void) { printf("\007\007 * * * BATTERY IS LOW * * * \007\007"); } /* APM hook manager */ static struct apmhook * apm_add_hook(struct apmhook **list, struct apmhook *ah) { int s; struct apmhook *p, *prev; #ifdef APM_DEBUG printf("Add hook \"%s\"\n", ah->ah_name); #endif s = splhigh(); if (ah == NULL) panic("illegal apm_hook!"); prev = NULL; for (p = *list; p != NULL; prev = p, p = p->ah_next) if (p->ah_order > ah->ah_order) break; if (prev == NULL) { ah->ah_next = *list; *list = ah; } else { ah->ah_next = prev->ah_next; prev->ah_next = ah; } splx(s); return ah; } static void apm_del_hook(struct apmhook **list, struct apmhook *ah) { int s; struct apmhook *p, *prev; s = splhigh(); prev = NULL; for (p = *list; p != NULL; prev = p, p = p->ah_next) if (p == ah) goto deleteit; panic("Tried to delete unregistered apm_hook."); goto nosuchnode; deleteit: if (prev != NULL) prev->ah_next = p->ah_next; else *list = p->ah_next; nosuchnode: splx(s); } /* APM driver calls some functions automatically */ static void apm_execute_hook(struct apmhook *list) { struct apmhook *p; for (p = list; p != NULL; p = p->ah_next) { #ifdef APM_DEBUG printf("Execute APM hook \"%s.\"\n", p->ah_name); #endif if ((*(p->ah_fun))(p->ah_arg)) printf("Warning: APM hook \"%s\" failed", p->ah_name); } } /* establish an apm hook */ struct apmhook * apm_hook_establish(int apmh, struct apmhook *ah) { if (apmh < 0 || apmh >= NAPM_HOOK) return NULL; return apm_add_hook(&hook[apmh], ah); } /* disestablish an apm hook */ void apm_hook_disestablish(int apmh, struct apmhook *ah) { if (apmh < 0 || apmh >= NAPM_HOOK) return; apm_del_hook(&hook[apmh], ah); } static struct timeval suspend_time; static struct timeval diff_time; static int apm_default_resume(void *arg) { int pl; u_int second, minute, hour; struct timeval resume_time, tmp_time; /* modified for adjkerntz */ pl = splsoftclock(); i8254_restore(); /* restore timer_freq and hz */ inittodr(0); /* adjust time to RTC */ microtime(&resume_time); getmicrotime(&tmp_time); timevaladd(&tmp_time, &diff_time); #ifdef FIXME /* XXX THIS DOESN'T WORK!!! */ time = tmp_time; #endif #ifdef APM_FIXUP_CALLTODO /* Calculate the delta time suspended */ timevalsub(&resume_time, &suspend_time); /* Fixup the calltodo list with the delta time. */ adjust_timeout_calltodo(&resume_time); #endif /* APM_FIXUP_CALLTODOK */ splx(pl); #ifndef APM_FIXUP_CALLTODO second = resume_time.tv_sec - suspend_time.tv_sec; #else /* APM_FIXUP_CALLTODO */ /* * We've already calculated resume_time to be the delta between * the suspend and the resume. */ second = resume_time.tv_sec; #endif /* APM_FIXUP_CALLTODO */ hour = second / 3600; second %= 3600; minute = second / 60; second %= 60; log(LOG_NOTICE, "resumed from suspended mode (slept %02d:%02d:%02d)\n", hour, minute, second); return 0; } static int apm_default_suspend(void *arg) { int pl; pl = splsoftclock(); microtime(&diff_time); inittodr(0); microtime(&suspend_time); timevalsub(&diff_time, &suspend_time); splx(pl); return 0; } static int apm_record_event __P((struct apm_softc *, u_int)); static void apm_processevent(void); static u_int apm_op_inprog = 0; static void apm_do_suspend(void) { struct apm_softc *sc = &apm_softc; int error; if (!sc) return; apm_op_inprog = 0; sc->suspends = sc->suspend_countdown = 0; if (sc->initialized) { error = DEVICE_SUSPEND(root_bus); /* * XXX Shouldn't ignore the error like this, but should * instead fix the newbus code. Until that happens, * I'm doing this to get suspend working again. */ if (error) printf("DEVICE_SUSPEND error %d, ignored\n", error); apm_execute_hook(hook[APM_HOOK_SUSPEND]); if (apm_suspend_system(PMST_SUSPEND) == 0) apm_processevent(); else /* Failure, 'resume' the system again */ apm_execute_hook(hook[APM_HOOK_RESUME]); } } static void apm_do_standby(void) { struct apm_softc *sc = &apm_softc; if (!sc) return; apm_op_inprog = 0; sc->standbys = sc->standby_countdown = 0; if (sc->initialized) { /* * As far as standby, we don't need to execute * all of suspend hooks. */ apm_default_suspend(&apm_softc); if (apm_suspend_system(PMST_STANDBY) == 0) apm_processevent(); } } static void apm_lastreq_notify(void) { struct apm_softc *sc = &apm_softc; sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; sc->bios.r.ebx = PMDV_ALLDEV; sc->bios.r.ecx = PMST_LASTREQNOTIFY; sc->bios.r.edx = 0; apm_bioscall(); } static int apm_lastreq_rejected(void) { struct apm_softc *sc = &apm_softc; if (apm_op_inprog == 0) { return 1; /* no operation in progress */ } sc->bios.r.eax = (APM_BIOS << 8) | APM_SETPWSTATE; sc->bios.r.ebx = PMDV_ALLDEV; sc->bios.r.ecx = PMST_LASTREQREJECT; sc->bios.r.edx = 0; if (apm_bioscall()) { #ifdef APM_DEBUG printf("apm_lastreq_rejected: failed\n"); #endif return 1; } apm_op_inprog = 0; return 0; } /* * Public interface to the suspend/resume: * * Execute suspend and resume hook before and after sleep, respectively. * */ void apm_suspend(int state) { struct apm_softc *sc = &apm_softc; if (!sc->initialized) return; switch (state) { case PMST_SUSPEND: if (sc->suspends) return; sc->suspends++; sc->suspend_countdown = apm_suspend_delay; break; case PMST_STANDBY: if (sc->standbys) return; sc->standbys++; sc->standby_countdown = apm_standby_delay; break; default: printf("apm_suspend: Unknown Suspend state 0x%x\n", state); return; } apm_op_inprog++; apm_lastreq_notify(); } void apm_resume(void) { struct apm_softc *sc = &apm_softc; if (!sc) return; if (sc->initialized) { DEVICE_RESUME(root_bus); apm_execute_hook(hook[APM_HOOK_RESUME]); } } /* get APM information */ static int apm_get_info(apm_info_t aip) { struct apm_softc *sc = &apm_softc; sc->bios.r.eax = (APM_BIOS << 8) | APM_GETPWSTATUS; sc->bios.r.ebx = PMDV_ALLDEV; sc->bios.r.ecx = 0; sc->bios.r.edx = 0xffff; /* default to unknown battery time */ if (apm_bioscall()) return 1; aip->ai_infoversion = 1; aip->ai_acline = (sc->bios.r.ebx >> 8) & 0xff; aip->ai_batt_stat = sc->bios.r.ebx & 0xff; aip->ai_batt_life = sc->bios.r.ecx & 0xff; aip->ai_major = (u_int)sc->majorversion; aip->ai_minor = (u_int)sc->minorversion; aip->ai_status = (u_int)sc->active; sc->bios.r.edx &= 0xffff; if (sc->bios.r.edx == 0xffff) /* Time is unknown */ aip->ai_batt_time = -1; else if (sc->bios.r.edx & 0x8000) /* Time is in minutes */ aip->ai_batt_time = (sc->bios.r.edx & 0x7fff) * 60; else /* Time is in seconds */ aip->ai_batt_time = sc->bios.r.edx; sc->bios.r.eax = (APM_BIOS << 8) | APM_GETCAPABILITIES; sc->bios.r.ebx = 0; sc->bios.r.ecx = 0; sc->bios.r.edx = 0; if (apm_bioscall()) { aip->ai_batteries = -1; /* Unknown */ aip->ai_capabilities = 0xff00; /* Unknown, with no bits set */ } else { aip->ai_batteries = sc->bios.r.ebx & 0xff; aip->ai_capabilities = sc->bios.r.ecx & 0xf; } bzero(aip->ai_spare, sizeof aip->ai_spare); return 0; } /* inform APM BIOS that CPU is idle */ void apm_cpu_idle(void) { struct apm_softc *sc = &apm_softc; if (sc->active) { sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUIDLE; sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; (void) apm_bioscall(); } /* * Some APM implementation halts CPU in BIOS, whenever * "CPU-idle" function are invoked, but swtch() of * FreeBSD halts CPU, therefore, CPU is halted twice * in the sched loop. It makes the interrupt latency * terribly long and be able to cause a serious problem * in interrupt processing. We prevent it by removing * "hlt" operation from swtch() and managed it under * APM driver. */ if (!sc->active || sc->always_halt_cpu) __asm("hlt"); /* wait for interrupt */ } /* inform APM BIOS that CPU is busy */ void apm_cpu_busy(void) { struct apm_softc *sc = &apm_softc; /* * The APM specification says this is only necessary if your BIOS * slows down the processor in the idle task, otherwise it's not * necessary. */ if (sc->slow_idle_cpu && sc->active) { sc->bios.r.eax = (APM_BIOS <<8) | APM_CPUBUSY; sc->bios.r.edx = sc->bios.r.ecx = sc->bios.r.ebx = 0; apm_bioscall(); } } /* * APM timeout routine: * * This routine is automatically called by timer once per second. */ static void apm_timeout(void *dummy) { struct apm_softc *sc = &apm_softc; if (apm_op_inprog) apm_lastreq_notify(); if (sc->standbys && sc->standby_countdown-- <= 0) apm_do_standby(); if (sc->suspends && sc->suspend_countdown-- <= 0) apm_do_suspend(); if (!sc->bios_busy) apm_processevent(); if (sc->active == 1) /* Run slightly more oftan than 1 Hz */ apm_timeout_ch = timeout(apm_timeout, NULL, hz - 1 ); } /* enable APM BIOS */ static void apm_event_enable(void) { struct apm_softc *sc = &apm_softc; #ifdef APM_DEBUG printf("called apm_event_enable()\n"); #endif if (sc->initialized) { sc->active = 1; apm_timeout(sc); } } /* disable APM BIOS */ static void apm_event_disable(void) { struct apm_softc *sc = &apm_softc; #ifdef APM_DEBUG printf("called apm_event_disable()\n"); #endif if (sc->initialized) { untimeout(apm_timeout, NULL, apm_timeout_ch); sc->active = 0; } } /* halt CPU in scheduling loop */ static void apm_halt_cpu(void) { struct apm_softc *sc = &apm_softc; if (sc->initialized) sc->always_halt_cpu = 1; } /* don't halt CPU in scheduling loop */ static void apm_not_halt_cpu(void) { struct apm_softc *sc = &apm_softc; if (sc->initialized) sc->always_halt_cpu = 0; } /* device driver definitions */ /* * Create "connection point" */ static void apm_identify(driver_t *driver, device_t parent) { device_t child; child = BUS_ADD_CHILD(parent, 0, "apm", 0); if (child == NULL) panic("apm_identify"); } /* * probe for APM BIOS */ static int apm_probe(device_t dev) { #define APM_KERNBASE KERNBASE struct vm86frame vmf; struct apm_softc *sc = &apm_softc; int disabled, flags; if (resource_int_value("apm", 0, "disabled", &disabled) == 0 && disabled != 0) return ENXIO; device_set_desc(dev, "APM BIOS"); if ( device_get_unit(dev) > 0 ) { printf("apm: Only one APM driver supported.\n"); return ENXIO; } if (resource_int_value("apm", 0, "flags", &flags) != 0) flags = 0; bzero(&vmf, sizeof(struct vm86frame)); /* safety */ bzero(&apm_softc, sizeof(apm_softc)); vmf.vmf_ah = APM_BIOS; vmf.vmf_al = APM_INSTCHECK; vmf.vmf_bx = 0; if (vm86_intcall(APM_INT, &vmf)) return ENXIO; /* APM not found */ if (vmf.vmf_bx != 0x504d) { printf("apm: incorrect signature (0x%x)\n", vmf.vmf_bx); return ENXIO; } if ((vmf.vmf_cx & (APM_32BIT_SUPPORT | APM_16BIT_SUPPORT)) == 0) { printf("apm: protected mode connections are not supported\n"); return ENXIO; } apm_version = vmf.vmf_ax; sc->slow_idle_cpu = ((vmf.vmf_cx & APM_CPUIDLE_SLOW) != 0); sc->disabled = ((vmf.vmf_cx & APM_DISABLED) != 0); sc->disengaged = ((vmf.vmf_cx & APM_DISENGAGED) != 0); vmf.vmf_ah = APM_BIOS; vmf.vmf_al = APM_DISCONNECT; vmf.vmf_bx = 0; vm86_intcall(APM_INT, &vmf); /* disconnect, just in case */ if ((vmf.vmf_cx & APM_32BIT_SUPPORT) != 0) { vmf.vmf_ah = APM_BIOS; vmf.vmf_al = APM_PROT32CONNECT; vmf.vmf_bx = 0; if (vm86_intcall(APM_INT, &vmf)) { printf("apm: 32-bit connection error.\n"); return (ENXIO); } sc->bios.seg.code32.base = (vmf.vmf_ax << 4) + APM_KERNBASE; sc->bios.seg.code32.limit = 0xffff; sc->bios.seg.code16.base = (vmf.vmf_cx << 4) + APM_KERNBASE; sc->bios.seg.code16.limit = 0xffff; sc->bios.seg.data.base = (vmf.vmf_dx << 4) + APM_KERNBASE; sc->bios.seg.data.limit = 0xffff; sc->bios.entry = vmf.vmf_ebx; sc->connectmode = APM_PROT32CONNECT; } else { /* use 16-bit connection */ vmf.vmf_ah = APM_BIOS; vmf.vmf_al = APM_PROT16CONNECT; vmf.vmf_bx = 0; if (vm86_intcall(APM_INT, &vmf)) { printf("apm: 16-bit connection error.\n"); return (ENXIO); } sc->bios.seg.code16.base = (vmf.vmf_ax << 4) + APM_KERNBASE; sc->bios.seg.code16.limit = 0xffff; sc->bios.seg.data.base = (vmf.vmf_cx << 4) + APM_KERNBASE; sc->bios.seg.data.limit = 0xffff; sc->bios.entry = vmf.vmf_bx; sc->connectmode = APM_PROT16CONNECT; } return(0); } /* * return 0 if the user will notice and handle the event, * return 1 if the kernel driver should do so. */ static int apm_record_event(struct apm_softc *sc, u_int event_type) { struct apm_event_info *evp; if ((sc->sc_flags & SCFLAG_OPEN) == 0) return 1; /* no user waiting */ if (sc->event_count == APM_NEVENTS) return 1; /* overflow */ if (sc->event_filter[event_type] == 0) return 1; /* not registered */ evp = &sc->event_list[sc->event_ptr]; sc->event_count++; sc->event_ptr++; sc->event_ptr %= APM_NEVENTS; evp->type = event_type; evp->index = ++apm_evindex; selwakeup(&sc->sc_rsel); return (sc->sc_flags & SCFLAG_OCTL) ? 0 : 1; /* user may handle */ } /* Process APM event */ static void apm_processevent(void) { int apm_event; struct apm_softc *sc = &apm_softc; #ifdef APM_DEBUG # define OPMEV_DEBUGMESSAGE(symbol) case symbol: \ printf("Received APM Event: " #symbol "\n"); #else # define OPMEV_DEBUGMESSAGE(symbol) case symbol: #endif do { apm_event = apm_getevent(); switch (apm_event) { OPMEV_DEBUGMESSAGE(PMEV_STANDBYREQ); if (apm_op_inprog == 0) { apm_op_inprog++; if (apm_record_event(sc, apm_event)) { apm_suspend(PMST_STANDBY); } } break; OPMEV_DEBUGMESSAGE(PMEV_USERSTANDBYREQ); if (apm_op_inprog == 0) { apm_op_inprog++; if (apm_record_event(sc, apm_event)) { apm_suspend(PMST_STANDBY); } } break; OPMEV_DEBUGMESSAGE(PMEV_SUSPENDREQ); apm_lastreq_notify(); if (apm_op_inprog == 0) { apm_op_inprog++; if (apm_record_event(sc, apm_event)) { apm_do_suspend(); } } return; /* XXX skip the rest */ OPMEV_DEBUGMESSAGE(PMEV_USERSUSPENDREQ); apm_lastreq_notify(); if (apm_op_inprog == 0) { apm_op_inprog++; if (apm_record_event(sc, apm_event)) { apm_do_suspend(); } } return; /* XXX skip the rest */ OPMEV_DEBUGMESSAGE(PMEV_CRITSUSPEND); apm_do_suspend(); break; OPMEV_DEBUGMESSAGE(PMEV_NORMRESUME); apm_record_event(sc, apm_event); apm_resume(); break; OPMEV_DEBUGMESSAGE(PMEV_CRITRESUME); apm_record_event(sc, apm_event); apm_resume(); break; OPMEV_DEBUGMESSAGE(PMEV_STANDBYRESUME); apm_record_event(sc, apm_event); apm_resume(); break; OPMEV_DEBUGMESSAGE(PMEV_BATTERYLOW); if (apm_record_event(sc, apm_event)) { apm_battery_low(); apm_suspend(PMST_SUSPEND); } break; OPMEV_DEBUGMESSAGE(PMEV_POWERSTATECHANGE); apm_record_event(sc, apm_event); break; OPMEV_DEBUGMESSAGE(PMEV_UPDATETIME); apm_record_event(sc, apm_event); inittodr(0); /* adjust time to RTC */ break; OPMEV_DEBUGMESSAGE(PMEV_CAPABILITIESCHANGE); apm_record_event(sc, apm_event); break; case PMEV_NOEVENT: break; default: printf("Unknown Original APM Event 0x%x\n", apm_event); break; } } while (apm_event != PMEV_NOEVENT); } /* * Attach APM: * * Initialize APM driver */ static int apm_attach(device_t dev) { struct apm_softc *sc = &apm_softc; int flags; int drv_version; if (resource_int_value("apm", 0, "flags", &flags) != 0) flags = 0; if (flags & 0x20) statclock_disable = 1; sc->initialized = 0; /* Must be externally enabled */ sc->active = 0; /* Always call HLT in idle loop */ sc->always_halt_cpu = 1; /* print bootstrap messages */ #ifdef APM_DEBUG printf("apm: APM BIOS version %04x\n", apm_version); printf("apm: Code16 0x%08x, Data 0x%08x\n", sc->bios.seg.code16.base, sc->bios.seg.data.base); printf("apm: Code entry 0x%08x, Idling CPU %s, Management %s\n", sc->bios.entry, is_enabled(sc->slow_idle_cpu), is_enabled(!sc->disabled)); printf("apm: CS_limit=0x%x, DS_limit=0x%x\n", sc->bios.seg.code16.limit, sc->bios.seg.data.limit); #endif /* APM_DEBUG */ #if 0 /* * XXX this may not be needed anymore */ if ((flags & 0x10)) { if ((flags & 0xf) >= 0x2) { apm_driver_version(0x102); } if (!apm_version && (flags & 0xf) >= 0x1) { apm_driver_version(0x101); } } else { apm_driver_version(0x102); if (!apm_version) apm_driver_version(0x101); } #endif /* * In one test, apm bios version was 1.02; an attempt to register * a 1.04 driver resulted in a 1.00 connection! Registering a * 1.02 driver resulted in a 1.02 connection. */ drv_version = apm_version > 0x102 ? 0x102 : apm_version; for (; drv_version > 0x100; drv_version--) if (apm_driver_version(drv_version) == 0) break; sc->minorversion = ((drv_version & 0x00f0) >> 4) * 10 + ((drv_version & 0x000f) >> 0); sc->majorversion = ((drv_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8); sc->intversion = INTVERSION(sc->majorversion, sc->minorversion); #ifdef APM_DEBUG if (sc->intversion >= INTVERSION(1, 1)) printf("apm: Engaged control %s\n", is_enabled(!sc->disengaged)); #endif printf("apm: found APM BIOS v%ld.%ld, connected at v%d.%d\n", ((apm_version & 0xf000) >> 12) * 10 + ((apm_version & 0x0f00) >> 8), ((apm_version & 0x00f0) >> 4) * 10 + ((apm_version & 0x000f) >> 0), sc->majorversion, sc->minorversion); #ifdef APM_DEBUG printf("apm: Slow Idling CPU %s\n", is_enabled(sc->slow_idle_cpu)); #endif /* enable power management */ if (sc->disabled) { if (apm_enable_disable_pm(1)) { #ifdef APM_DEBUG printf("apm: *Warning* enable function failed! [%x]\n", (sc->bios.r.eax >> 8) & 0xff); #endif } } /* engage power managment (APM 1.1 or later) */ if (sc->intversion >= INTVERSION(1, 1) && sc->disengaged) { if (apm_engage_disengage_pm(1)) { #ifdef APM_DEBUG printf("apm: *Warning* engage function failed err=[%x]", (sc->bios.r.eax >> 8) & 0xff); printf(" (Docked or using external power?).\n"); #endif } } /* default suspend hook */ sc->sc_suspend.ah_fun = apm_default_suspend; sc->sc_suspend.ah_arg = sc; sc->sc_suspend.ah_name = "default suspend"; sc->sc_suspend.ah_order = APM_MAX_ORDER; /* default resume hook */ sc->sc_resume.ah_fun = apm_default_resume; sc->sc_resume.ah_arg = sc; sc->sc_resume.ah_name = "default resume"; sc->sc_resume.ah_order = APM_MIN_ORDER; apm_hook_establish(APM_HOOK_SUSPEND, &sc->sc_suspend); apm_hook_establish(APM_HOOK_RESUME , &sc->sc_resume); /* Power the system off using APM */ EVENTHANDLER_REGISTER(shutdown_final, apm_power_off, NULL, SHUTDOWN_PRI_LAST); sc->initialized = 1; make_dev(&apm_cdevsw, 0, 0, 5, 0660, "apm"); make_dev(&apm_cdevsw, 8, 0, 5, 0660, "apmctl"); return 0; } static int apmopen(dev_t dev, int flag, int fmt, struct proc *p) { struct apm_softc *sc = &apm_softc; int ctl = APMDEV(dev); if (!sc->initialized) return (ENXIO); switch (ctl) { case APMDEV_CTL: if (!(flag & FWRITE)) return EINVAL; if (sc->sc_flags & SCFLAG_OCTL) return EBUSY; sc->sc_flags |= SCFLAG_OCTL; bzero(sc->event_filter, sizeof sc->event_filter); break; case APMDEV_NORMAL: sc->sc_flags |= SCFLAG_ONORMAL; break; default: return ENXIO; break; } return 0; } static int apmclose(dev_t dev, int flag, int fmt, struct proc *p) { struct apm_softc *sc = &apm_softc; int ctl = APMDEV(dev); switch (ctl) { case APMDEV_CTL: apm_lastreq_rejected(); sc->sc_flags &= ~SCFLAG_OCTL; bzero(sc->event_filter, sizeof sc->event_filter); break; case APMDEV_NORMAL: sc->sc_flags &= ~SCFLAG_ONORMAL; break; } if ((sc->sc_flags & SCFLAG_OPEN) == 0) { sc->event_count = 0; sc->event_ptr = 0; } return 0; } static int apmioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct proc *p) { struct apm_softc *sc = &apm_softc; struct apm_bios_arg *args; int error = 0; int ret; int newstate; if (!sc->initialized) return (ENXIO); #ifdef APM_DEBUG printf("APM ioctl: cmd = 0x%x\n", cmd); #endif switch (cmd) { case APMIO_SUSPEND: if (sc->active) apm_suspend(PMST_SUSPEND); else error = EINVAL; break; case APMIO_STANDBY: if (sc->active) apm_suspend(PMST_STANDBY); else error = EINVAL; break; case APMIO_GETINFO_OLD: { struct apm_info info; apm_info_old_t aiop; if (apm_get_info(&info)) error = ENXIO; aiop = (apm_info_old_t)addr; aiop->ai_major = info.ai_major; aiop->ai_minor = info.ai_minor; aiop->ai_acline = info.ai_acline; aiop->ai_batt_stat = info.ai_batt_stat; aiop->ai_batt_life = info.ai_batt_life; aiop->ai_status = info.ai_status; } break; case APMIO_GETINFO: if (apm_get_info((apm_info_t)addr)) error = ENXIO; break; case APMIO_ENABLE: apm_event_enable(); break; case APMIO_DISABLE: apm_event_disable(); break; case APMIO_HALTCPU: apm_halt_cpu(); break; case APMIO_NOTHALTCPU: apm_not_halt_cpu(); break; case APMIO_DISPLAY: newstate = *(int *)addr; if (apm_display(newstate)) error = ENXIO; break; case APMIO_BIOS: /* XXX compatibility with the old interface */ args = (struct apm_bios_arg *)addr; sc->bios.r.eax = args->eax; sc->bios.r.ebx = args->ebx; sc->bios.r.ecx = args->ecx; sc->bios.r.edx = args->edx; sc->bios.r.esi = args->esi; sc->bios.r.edi = args->edi; if ((ret = apm_bioscall())) { /* * Return code 1 means bios call was unsuccessful. * Error code is stored in %ah. * Return code -1 means bios call was unsupported * in the APM BIOS version. */ if (ret == -1) { error = EINVAL; } } else { /* * Return code 0 means bios call was successful. * We need only %al and can discard %ah. */ sc->bios.r.eax &= 0xff; } args->eax = sc->bios.r.eax; args->ebx = sc->bios.r.ebx; args->ecx = sc->bios.r.ecx; args->edx = sc->bios.r.edx; args->esi = sc->bios.r.esi; args->edi = sc->bios.r.edi; break; default: error = EINVAL; break; } /* for /dev/apmctl */ if (APMDEV(dev) == APMDEV_CTL) { struct apm_event_info *evp; int i; error = 0; switch (cmd) { case APMIO_NEXTEVENT: if (!sc->event_count) { error = EAGAIN; } else { evp = (struct apm_event_info *)addr; i = sc->event_ptr + APM_NEVENTS - sc->event_count; i %= APM_NEVENTS; *evp = sc->event_list[i]; sc->event_count--; } break; case APMIO_REJECTLASTREQ: if (apm_lastreq_rejected()) { error = EINVAL; } break; default: error = EINVAL; break; } } return error; } static int apmwrite(dev_t dev, struct uio *uio, int ioflag) { struct apm_softc *sc = &apm_softc; u_int event_type; int error; u_char enabled; if (APMDEV(dev) != APMDEV_CTL) return(ENODEV); if (uio->uio_resid != sizeof(u_int)) return(E2BIG); if ((error = uiomove((caddr_t)&event_type, sizeof(u_int), uio))) return(error); if (event_type < 0 || event_type >= APM_NPMEV) return(EINVAL); if (sc->event_filter[event_type] == 0) { enabled = 1; } else { enabled = 0; } sc->event_filter[event_type] = enabled; #ifdef APM_DEBUG printf("apmwrite: event 0x%x %s\n", event_type, is_enabled(enabled)); #endif return uio->uio_resid; } static int apmpoll(dev_t dev, int events, struct proc *p) { struct apm_softc *sc = &apm_softc; int revents = 0; if (events & (POLLIN | POLLRDNORM)) { if (sc->event_count) { revents |= events & (POLLIN | POLLRDNORM); } else { selrecord(p, &sc->sc_rsel); } } return (revents); } static device_method_t apm_methods[] = { /* Device interface */ DEVMETHOD(device_identify, apm_identify), DEVMETHOD(device_probe, apm_probe), DEVMETHOD(device_attach, apm_attach), { 0, 0 } }; static driver_t apm_driver = { "apm", apm_methods, 1, /* no softc (XXX) */ }; static devclass_t apm_devclass; DRIVER_MODULE(apm, nexus, apm_driver, apm_devclass, 0, 0);