/* $OpenBSD: apm.c,v 1.17 2011/07/02 22:20:07 nicm Exp $ */ /*- * Copyright (c) 2001 Alexander Guy. All rights reserved. * Copyright (c) 1998-2001 Michael Shalayeff. All rights reserved. * Copyright (c) 1995 John T. Kohl. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the names of the authors nor the names of contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * */ #include "apm.h" #if NAPM > 1 #error only one APM emulation device may be configured #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(APMDEBUG) #define DPRINTF(x) printf x #else #define DPRINTF(x) /**/ #endif struct apm_softc { struct device sc_dev; struct klist sc_note; int sc_flags; }; int apmmatch(struct device *, void *, void *); void apmattach(struct device *, struct device *, void *); struct cfattach apm_ca = { sizeof(struct apm_softc), apmmatch, apmattach }; struct cfdriver apm_cd = { NULL, "apm", DV_DULL }; #define APMUNIT(dev) (minor(dev)&0xf0) #define APMDEV(dev) (minor(dev)&0x0f) #define APMDEV_NORMAL 0 #define APMDEV_CTL 8 void filt_apmrdetach(struct knote *kn); int filt_apmread(struct knote *kn, long hint); int apmkqfilter(dev_t dev, struct knote *kn); struct filterops apmread_filtops = { 1, NULL, filt_apmrdetach, filt_apmread}; /* * Flags to control kernel display * SCFLAG_NOPRINT: do not output APM power messages due to * a power change event. * * SCFLAG_PCTPRINT: do not output APM power messages due to * to a power change event unless the battery * percentage changes. */ #define SCFLAG_NOPRINT 0x0008000 #define SCFLAG_PCTPRINT 0x0004000 #define SCFLAG_PRINT (SCFLAG_NOPRINT|SCFLAG_PCTPRINT) #define SCFLAG_OREAD (1 << 0) #define SCFLAG_OWRITE (1 << 1) #define SCFLAG_OPEN (SCFLAG_OREAD|SCFLAG_OWRITE) int apmmatch(struct device *parent, void *match, void *aux) { struct confargs *ca = aux; if (strcmp(ca->ca_name, "apm") != 0) return (0); return (1); } void apmattach(struct device *parent, struct device *self, void *aux) { struct pmu_battery_info info; pm_battery_info(0, &info); printf(": battery flags 0x%X, ", info.flags); printf("%d%% charged\n", ((info.cur_charge * 100) / info.max_charge)); } int apmopen(dev_t dev, int flag, int mode, struct proc *p) { struct apm_softc *sc; int error = 0; /* apm0 only */ if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || !(sc = apm_cd.cd_devs[APMUNIT(dev)])) return ENXIO; DPRINTF(("apmopen: dev %d pid %d flag %x mode %x\n", APMDEV(dev), p->p_pid, flag, mode)); switch (APMDEV(dev)) { case APMDEV_CTL: if (!(flag & FWRITE)) { error = EINVAL; break; } if (sc->sc_flags & SCFLAG_OWRITE) { error = EBUSY; break; } sc->sc_flags |= SCFLAG_OWRITE; break; case APMDEV_NORMAL: if (!(flag & FREAD) || (flag & FWRITE)) { error = EINVAL; break; } sc->sc_flags |= SCFLAG_OREAD; break; default: error = ENXIO; break; } return error; } int apmclose(dev_t dev, int flag, int mode, struct proc *p) { struct apm_softc *sc; /* apm0 only */ if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || !(sc = apm_cd.cd_devs[APMUNIT(dev)])) return ENXIO; DPRINTF(("apmclose: pid %d flag %x mode %x\n", p->p_pid, flag, mode)); switch (APMDEV(dev)) { case APMDEV_CTL: sc->sc_flags &= ~SCFLAG_OWRITE; break; case APMDEV_NORMAL: sc->sc_flags &= ~SCFLAG_OREAD; break; } return 0; } int apmioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) { struct apm_softc *sc; struct pmu_battery_info batt; struct apm_power_info *power; int error = 0; /* apm0 only */ if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || !(sc = apm_cd.cd_devs[APMUNIT(dev)])) return ENXIO; switch (cmd) { /* some ioctl names from linux */ case APM_IOC_STANDBY: if ((flag & FWRITE) == 0) error = EBADF; break; case APM_IOC_SUSPEND: if ((flag & FWRITE) == 0) error = EBADF; break; case APM_IOC_PRN_CTL: if ((flag & FWRITE) == 0) error = EBADF; else { int flag = *(int *)data; DPRINTF(( "APM_IOC_PRN_CTL: %d\n", flag )); switch (flag) { case APM_PRINT_ON: /* enable printing */ sc->sc_flags &= ~SCFLAG_PRINT; break; case APM_PRINT_OFF: /* disable printing */ sc->sc_flags &= ~SCFLAG_PRINT; sc->sc_flags |= SCFLAG_NOPRINT; break; case APM_PRINT_PCT: /* disable some printing */ sc->sc_flags &= ~SCFLAG_PRINT; sc->sc_flags |= SCFLAG_PCTPRINT; break; default: error = EINVAL; break; } } break; case APM_IOC_DEV_CTL: if ((flag & FWRITE) == 0) error = EBADF; break; case APM_IOC_GETPOWER: power = (struct apm_power_info *)data; pm_battery_info(0, &batt); power->ac_state = ((batt.flags & PMU_PWR_AC_PRESENT) ? APM_AC_ON : APM_AC_OFF); power->battery_life = ((batt.cur_charge * 100) / batt.max_charge); /* * If the battery is charging, return the minutes left until * charging is complete. apmd knows this. */ if (!(batt.flags & PMU_PWR_BATT_PRESENT)) { power->battery_state = APM_BATT_UNKNOWN; power->minutes_left = 0; power->battery_life = 0; } else if ((power->ac_state == APM_AC_ON) && (batt.draw > 0)) { power->minutes_left = (((batt.max_charge - batt.cur_charge) * 3600) / batt.draw) / 60; power->battery_state = APM_BATT_CHARGING; } else { power->minutes_left = ((batt.cur_charge * 3600) / (-batt.draw)) / 60; /* XXX - Arbitrary */ if (power->battery_life > 60) power->battery_state = APM_BATT_HIGH; else if (power->battery_life < 10) power->battery_state = APM_BATT_CRITICAL; else power->battery_state = APM_BATT_LOW; } break; case APM_IOC_STANDBY_REQ: if ((flag & FWRITE) == 0) error = EBADF; break; case APM_IOC_SUSPEND_REQ: if ((flag & FWRITE) == 0) error = EBADF; break; default: error = ENOTTY; } return error; } void filt_apmrdetach(struct knote *kn) { struct apm_softc *sc = (struct apm_softc *)kn->kn_hook; SLIST_REMOVE(&sc->sc_note, kn, knote, kn_selnext); } int filt_apmread(struct knote *kn, long hint) { /* XXX weird kqueue_scan() semantics */ if (hint && !kn->kn_data) kn->kn_data = (int)hint; return (1); } int apmkqfilter(dev_t dev, struct knote *kn) { struct apm_softc *sc; /* apm0 only */ if (!apm_cd.cd_ndevs || APMUNIT(dev) != 0 || !(sc = apm_cd.cd_devs[APMUNIT(dev)])) return ENXIO; switch (kn->kn_filter) { case EVFILT_READ: kn->kn_fop = &apmread_filtops; break; default: return (EINVAL); } kn->kn_hook = (caddr_t)sc; SLIST_INSERT_HEAD(&sc->sc_note, kn, kn_selnext); return (0); }