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com_mainbus.c revision 1.6 
      1 /*	$NetBSD: com_mainbus.c,v 1.6 2002/10/02 02:26:42 thorpej Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Jason R. Thorpe.
      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 "opt_algor_p4032.h"
     40 
     41 #include <sys/cdefs.h>			/* RCS ID & Copyright macro defns */
     42 
     43 __KERNEL_RCSID(0, "$NetBSD: com_mainbus.c,v 1.6 2002/10/02 02:26:42 thorpej Exp $");
     44 
     45 #include <sys/param.h>
     46 #include <sys/systm.h>
     47 #include <sys/ioctl.h>
     48 #include <sys/select.h>
     49 #include <sys/tty.h>
     50 #include <sys/proc.h>
     51 #include <sys/user.h>
     52 #include <sys/conf.h>
     53 #include <sys/file.h>
     54 #include <sys/uio.h>
     55 #include <sys/kernel.h>
     56 #include <sys/syslog.h>
     57 #include <sys/types.h>
     58 #include <sys/device.h>
     59 
     60 #include <machine/autoconf.h>
     61 #include <machine/intr.h>
     62 #include <machine/bus.h>
     63 
     64 #include <dev/ic/comreg.h>
     65 #include <dev/ic/comvar.h>
     66 
     67 struct com_mainbus_softc {
     68 	struct	com_softc sc_com;	/* real "com" softc */
     69 
     70 	/* mainbus-specific goo. */
     71 	void	*sc_ih;			/* interrupt handler */
     72 };
     73 
     74 int	com_mainbus_match(struct device *, struct cfdata *, void *);
     75 void	com_mainbus_attach(struct device *, struct device *, void *);
     76 void	com_mainbus_cleanup(void *);
     77 
     78 CFATTACH_DECL(com_mainbus, sizeof(struct com_mainbus_softc),
     79 	com_mainbus_match, com_mainbus_attach, NULL, NULL);
     80 };
     81 
     82 int
     83 com_mainbus_match(struct device *parent, struct cfdata *match, void *aux)
     84 {
     85 	struct mainbus_attach_args *ma = aux;
     86 
     87 	/* Always present. */
     88 	if (strcmp(ma->ma_name, match->cf_name) == 0)
     89 		return (1);
     90 
     91 	return (0);
     92 }
     93 
     94 void
     95 com_mainbus_attach(struct device *parent, struct device *self, void *aux)
     96 {
     97 	struct com_mainbus_softc *msc = (void *)self;
     98 	struct com_softc *sc = &msc->sc_com;
     99 	struct mainbus_attach_args *ma = aux;
    100 
    101 	sc->sc_iot = ma->ma_st;
    102 	sc->sc_iobase = ma->ma_addr;
    103 
    104 	if (com_is_console(sc->sc_iot, sc->sc_iobase, &sc->sc_ioh) == 0 &&
    105 	    bus_space_map(sc->sc_iot, sc->sc_iobase, COM_NPORTS, 0,
    106 			  &sc->sc_ioh) != 0) {
    107 		printf(": can't map i/o space\n");
    108 		return;
    109 	}
    110 
    111 	sc->sc_frequency = COM_FREQ;
    112 
    113 	com_attach_subr(sc);
    114 
    115 	msc->sc_ih = (*algor_intr_establish)(ma->ma_irq, comintr, sc);
    116 	if (msc->sc_ih == NULL) {
    117 		printf("%s: unable to establish interrupt\n",
    118 		    sc->sc_dev.dv_xname);
    119 		return;
    120 	}
    121 
    122 	/*
    123 	 * Shutdown hook for buggy BIOSs that don't recognize the UART
    124 	 * without a disabled FIFO.
    125 	 */
    126 	if (shutdownhook_establish(com_mainbus_cleanup, sc) == NULL)
    127 		panic("com_mainbus_attach: could not establish shutdown hook");
    128 }
    129 
    130 void
    131 com_mainbus_cleanup(void *arg)
    132 {
    133 	struct com_softc *sc = arg;
    134 
    135 	if (ISSET(sc->sc_hwflags, COM_HW_FIFO))
    136 		bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0);
    137 }
    138