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      1 /* $NetBSD: wsbellmux.c,v 1.1 2017/06/11 03:55:56 nat Exp $ */
      2 /*-
      3  * Copyright (c) 2017 Nathanial Sloss <nathanialsloss (at) yahoo.com.au>
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     16  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     17  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     18  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     19  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     20  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     21  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     22  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     23  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     24  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     25  * POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: wsbellmux.c,v 1.1 2017/06/11 03:55:56 nat Exp $");
     30 
     31 #include <sys/param.h>
     32 #include <sys/conf.h>
     33 #include <sys/types.h>
     34 #include <sys/device.h>
     35 #include <sys/errno.h>
     36 #include <sys/selinfo.h>
     37 
     38 #include "wsmux.h"
     39 
     40 #include <dev/wscons/wsconsio.h>
     41 #include <dev/wscons/wsbellvar.h>
     42 
     43 /*
     44  * Print function (for parent devices).
     45  */
     46 int
     47 wsbelldevprint(void *aux, const char *pnp)
     48 {
     49 
     50 	if (pnp)
     51 		aprint_normal("wsbell at %s", pnp);
     52 	return (UNCONF);
     53 }
     54 
     55 #if NWSMUX > 0
     56 int
     57 wsbell_add_mux(int unit, struct wsmux_softc *muxsc)
     58 {
     59 	struct wsbell_softc *sc;
     60 	device_t wsbelldev;
     61 	cfdriver_t wsbellcd;
     62 
     63 	wsbelldev = device_find_by_driver_unit("wsbell", unit);
     64 	if (wsbelldev == NULL)
     65 		return ENXIO;
     66 	wsbellcd = device_cfdriver(wsbelldev);
     67 	if (wsbellcd == NULL)
     68 		return ENXIO;
     69 
     70 	sc = device_lookup_private(wsbellcd, unit);
     71 	if (sc == NULL)
     72 		return ENXIO;
     73 
     74 	if (sc->sc_base.me_parent != NULL || sc->sc_base.me_evp != NULL)
     75 		return (EBUSY);
     76 
     77 	return (wsmux_attach_sc(muxsc, &sc->sc_base));
     78 }
     79 #endif
     80