int
wsmouse_mux_open(struct wsevsrc *me, struct wseventvar *evp)
{
struct wsmouse_softc *sc = (struct wsmouse_softc *)me;
if (sc->sc_base.me_evp != NULL)
return (EBUSY);
return wsmousedoopen(sc, evp);
}
int
wsmouseopen(dev_t dev, int flags, int mode, struct proc *p)
{
struct wsmouse_softc *sc;
struct wseventvar *evar;
int error, unit;
unit = minor(dev);
if (unit >= wsmouse_cd.cd_ndevs || /* make sure it was attached */
(sc = wsmouse_cd.cd_devs[unit]) == NULL)
return (ENXIO);
#if NWSMUX > 0
DPRINTF(("wsmouseopen: %s mux=%p p=%p\n", sc->sc_base.me_dv.dv_xname,
sc->sc_base.me_parent, p));
#endif
if (sc->sc_dying)
return (EIO);
if ((flags & (FREAD | FWRITE)) == FWRITE)
return (0); /* always allow open for write
so ioctl() is possible. */
#if NWSMUX > 0
if (sc->sc_base.me_parent != NULL) {
/* Grab the mouse out of the greedy hands of the mux. */
DPRINTF(("wsmouseopen: detach\n"));
wsmux_detach_sc(&sc->sc_base);
}
#endif
if (sc->sc_base.me_evp != NULL)
return (EBUSY);
evar = &sc->sc_base.me_evar;
wsevent_init(evar);
evar->io = p->p_p;
error = wsmousedoopen(sc, evar);
if (error) {
DPRINTF(("wsmouseopen: %s open failed\n",
sc->sc_base.me_dv.dv_xname));
sc->sc_base.me_evp = NULL;
wsevent_fini(evar);
}
return (error);
}
int
wsmouseopen(dev_t dev, int flags, int mode, struct lwp *l)
{
struct wsmouse_softc *sc;
struct wseventvar *evar;
int error;
sc = device_lookup_private(&wsmouse_cd, minor(dev));
if (sc == NULL)
return ENXIO;
#if NWSMUX > 0
DPRINTF(("wsmouseopen: %s mux=%p p=%p\n", device_xname(sc->sc_base.me_dv),
sc->sc_base.me_parent, l));
#endif
if (sc->sc_dying)
return (EIO);
if ((flags & (FREAD | FWRITE)) == FWRITE)
return (0); /* always allow open for write
so ioctl() is possible. */
if (sc->sc_base.me_evp != NULL)
return (EBUSY);
evar = &sc->sc_base.me_evar;
wsevent_init(evar, l->l_proc);
sc->sc_base.me_evp = evar;
error = wsmousedoopen(sc, evar);
if (error) {
DPRINTF(("wsmouseopen: %s open failed\n",
device_xname(sc->sc_base.me_dv)));
sc->sc_base.me_evp = NULL;
wsevent_fini(evar);
}
return (error);
}
