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; if (apm_flags & APM_BIOS_PM_DISABLED) return ENXIO; DPRINTF(("apmopen: dev %d pid %d flag %x mode %x\n", APMDEV(dev), p->p_pid, flag, mode)); rw_enter_write(&sc->sc_lock); 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; } rw_exit_write(&sc->sc_lock); return error; }
int apmopen(dev_t dev, int flag, int mode, struct proc *p) { struct pxa2x0_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; }