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com_mainbus.c revision 1.2 
      1 /*	$NetBSD: com_mainbus.c,v 1.2 2001/06/10 05:26:59 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 1.2 2001/06/10 05:26:59 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 #if defined(ALGOR_P4032)
     68 #include <algor/algor/algor_p4032var.h>
     69 #endif
     70 
     71 struct com_mainbus_softc {
     72 	struct	com_softc sc_com;	/* real "com" softc */
     73 
     74 	/* mainbus-specific goo. */
     75 	void	*sc_ih;			/* interrupt handler */
     76 };
     77 
     78 int	com_mainbus_match(struct device *, struct cfdata *, void *);
     79 void	com_mainbus_attach(struct device *, struct device *, void *);
     80 void	com_mainbus_cleanup(void *);
     81 
     82 struct cfattach com_mainbus_ca = {
     83 	sizeof(struct com_mainbus_softc), com_mainbus_match,
     84 	    com_mainbus_attach
     85 };
     86 
     87 int
     88 com_mainbus_match(struct device *parent, struct cfdata *match, void *aux)
     89 {
     90 	struct mainbus_attach_args *ma = aux;
     91 
     92 	/* Always present. */
     93 	if (strcmp(ma->ma_name, match->cf_driver->cd_name) == 0)
     94 		return (1);
     95 
     96 	return (0);
     97 }
     98 
     99 void
    100 com_mainbus_attach(struct device *parent, struct device *self, void *aux)
    101 {
    102 	struct com_mainbus_softc *msc = (void *)self;
    103 	struct com_softc *sc = &msc->sc_com;
    104 	struct mainbus_attach_args *ma = aux;
    105 
    106 	sc->sc_iot = ma->ma_st;
    107 	sc->sc_iobase = ma->ma_addr;
    108 
    109 	if (com_is_console(sc->sc_iot, sc->sc_iobase, &sc->sc_ioh) == 0 &&
    110 	    bus_space_map(sc->sc_iot, sc->sc_iobase, COM_NPORTS, 0,
    111 			  &sc->sc_ioh) != 0) {
    112 		printf(": can't map i/o space\n");
    113 		return;
    114 	}
    115 
    116 	sc->sc_frequency = COM_FREQ;
    117 
    118 	com_attach_subr(sc);
    119 
    120 #if defined(ALGOR_P4032)
    121 	msc->sc_ih = algor_p4032_intr_establish(&p4032_irqmap[ma->ma_irq],
    122 	    comintr, sc);
    123 #endif
    124 
    125 	if (msc->sc_ih == NULL) {
    126 		printf("%s: unable to establish interrupt\n",
    127 		    sc->sc_dev.dv_xname);
    128 		return;
    129 	}
    130 
    131 	/*
    132 	 * Shutdown hook for buggy BIOSs that don't recognize the UART
    133 	 * without a disabled FIFO.
    134 	 */
    135 	if (shutdownhook_establish(com_mainbus_cleanup, sc) == NULL)
    136 		panic("com_mainbus_attach: could not establish shutdown hook");
    137 }
    138 
    139 void
    140 com_mainbus_cleanup(void *arg)
    141 {
    142 	struct com_softc *sc = arg;
    143 
    144 	if (ISSET(sc->sc_hwflags, COM_HW_FIFO))
    145 		bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0);
    146 }
    147