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com_ebus.c revision 1.9 
      1 /*	$NetBSD: com_ebus.c,v 1.9 2002/12/10 13:44:49 pk Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Charles M. Hannum.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <sys/param.h>
     40 #include <sys/systm.h>
     41 #include <sys/device.h>
     42 #include <sys/termios.h>
     43 
     44 #include <machine/bus.h>
     45 #include <machine/autoconf.h>
     46 #include <machine/intr.h>
     47 
     48 #include <dev/ebus/ebusreg.h>
     49 #include <dev/ebus/ebusvar.h>
     50 
     51 #include <dev/ic/comreg.h>
     52 #include <dev/ic/comvar.h>
     53 
     54 struct com_ebus_softc {
     55 	struct com_softc ebsc_com;	/* real "com" softc */
     56 
     57 	/* this space for rent */
     58 };
     59 
     60 static int com_ebus_match(struct device *, struct cfdata *, void *);
     61 static void com_ebus_attach(struct device *, struct device *, void *);
     62 
     63 CFATTACH_DECL(com_ebus, sizeof(struct com_ebus_softc),
     64     com_ebus_match, com_ebus_attach, NULL, NULL);
     65 
     66 static int
     67 com_ebus_match(parent, cf, aux)
     68 	struct device *parent;
     69 	struct cfdata *cf;
     70 	void *aux;
     71 {
     72 	struct ebus_attach_args *ea = aux;
     73 	bus_space_handle_t ioh;
     74 	int match;
     75 
     76 	if (strcmp(ea->ea_name, "su") != 0)
     77 		return (0);
     78 
     79 	match = 0;
     80 	if (bus_space_map(ea->ea_bustag, EBUS_ADDR_FROM_REG(&ea->ea_reg[0]),
     81 			  ea->ea_reg[0].size, 0, &ioh) == 0)
     82 	{
     83 		match = comprobe1(ea->ea_bustag, ioh);
     84 		bus_space_unmap(ea->ea_bustag, ioh, ea->ea_reg[0].size);
     85 	}
     86 
     87 	return (match);
     88 }
     89 
     90 static void
     91 com_ebus_attach(parent, self, aux)
     92 	struct device *parent, *self;
     93 	void *aux;
     94 {
     95 	struct com_ebus_softc *ebsc = (void *)self;
     96 	struct com_softc *sc = &ebsc->ebsc_com;
     97 	struct ebus_attach_args *ea = aux;
     98 
     99 	sc->sc_iot = ea->ea_bustag;
    100 	sc->sc_iobase = EBUS_ADDR_FROM_REG(&ea->ea_reg[0]);
    101 	sc->sc_frequency = COM_FREQ;
    102 	sc->sc_hwflags = COM_HW_NO_TXPRELOAD;
    103 
    104 	/*
    105 	 * XXX: It would be nice to be able to split console input and
    106 	 * output to different devices.  For now switch to serial
    107 	 * console if PROM stdin is on serial (so that we can use DDB).
    108 	 */
    109 	if (prom_instance_to_package(prom_stdin()) == ea->ea_node)
    110 		comcnattach(sc->sc_iot, sc->sc_iobase,
    111 			    B9600, sc->sc_frequency, (CLOCAL | CREAD | CS8));
    112 
    113 	if (!com_is_console(sc->sc_iot, sc->sc_iobase, &sc->sc_ioh)
    114 	    && bus_space_map(sc->sc_iot, sc->sc_iobase, ea->ea_reg[0].size,
    115 			     0, &sc->sc_ioh) != 0)
    116 	{
    117 		printf(": unable to map device registers\n");
    118 		return;
    119 	}
    120 
    121 	com_attach_subr(sc);
    122 
    123 	if (ea->ea_nintr != 0)
    124 		(void)bus_intr_establish(sc->sc_iot,
    125 					 ea->ea_intr[0], IPL_SERIAL,
    126 					 comintr, sc);
    127 }
    128