Home | History | Annotate | Line # | Download | only in isa
com_isa.c revision 1.1 
      1 /*	$NetBSD: com_isa.c,v 1.1 1997/04/04 20:56:37 mycroft Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1993, 1994, 1995, 1996
      5  *	Charles M. Hannum.  All rights reserved.
      6  * Copyright (c) 1991 The Regents of the University of California.
      7  * All rights reserved.
      8  *
      9  * Redistribution and use in source and binary forms, with or without
     10  * modification, are permitted provided that the following conditions
     11  * are met:
     12  * 1. Redistributions of source code must retain the above copyright
     13  *    notice, this list of conditions and the following disclaimer.
     14  * 2. Redistributions in binary form must reproduce the above copyright
     15  *    notice, this list of conditions and the following disclaimer in the
     16  *    documentation and/or other materials provided with the distribution.
     17  * 3. All advertising materials mentioning features or use of this software
     18  *    must display the following acknowledgement:
     19  *	This product includes software developed by the University of
     20  *	California, Berkeley and its contributors.
     21  * 4. Neither the name of the University nor the names of its contributors
     22  *    may be used to endorse or promote products derived from this software
     23  *    without specific prior written permission.
     24  *
     25  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     26  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     27  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     28  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     29  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     30  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     31  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     32  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     33  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     34  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     35  * SUCH DAMAGE.
     36  *
     37  *	@(#)com.c	7.5 (Berkeley) 5/16/91
     38  */
     39 
     40 #include <sys/param.h>
     41 #include <sys/systm.h>
     42 #include <sys/ioctl.h>
     43 #include <sys/select.h>
     44 #include <sys/tty.h>
     45 #include <sys/proc.h>
     46 #include <sys/user.h>
     47 #include <sys/conf.h>
     48 #include <sys/file.h>
     49 #include <sys/uio.h>
     50 #include <sys/kernel.h>
     51 #include <sys/syslog.h>
     52 #include <sys/types.h>
     53 #include <sys/device.h>
     54 
     55 #include <machine/intr.h>
     56 #include <machine/bus.h>
     57 
     58 #include <dev/isa/isavar.h>
     59 #include <dev/isa/comreg.h>
     60 #include <dev/isa/comvar.h>
     61 
     62 #ifndef __CGD_INDIRECT_CONFIG
     63 int com_isa_probe __P((struct device *, void *, void *));
     64 #else
     65 int com_isa_probe __P((struct device *, struct cfdata *, void *));
     66 #endif
     67 void com_isa_attach __P((struct device *, struct device *, void *));
     68 void com_isa_cleanup __P((void *));
     69 
     70 struct cfattach com_isa_ca = {
     71 	sizeof(struct com_softc), com_isa_probe, com_isa_attach
     72 };
     73 
     74 int
     75 com_isa_probe(parent, match, aux)
     76 	struct device *parent;
     77 #ifndef __CGD_INDIRECT_CONFIG
     78 	void *match;
     79 #else
     80 	struct cfdata *match;
     81 #endif
     82 	void *aux;
     83 {
     84 	bus_space_tag_t iot;
     85 	bus_space_handle_t ioh;
     86 	int iobase;
     87 	int rv = 1;
     88 	struct isa_attach_args *ia = aux;
     89 
     90 	iot = ia->ia_iot;
     91 	iobase = ia->ia_iobase;
     92 
     93 	/* if it's in use as console, it's there. */
     94 	if (iobase != comconsaddr || comconsattached) {
     95 		if (bus_space_map(iot, iobase, COM_NPORTS, 0, &ioh)) {
     96 			return 0;
     97 		}
     98 		rv = comprobe1(iot, ioh, iobase);
     99 		bus_space_unmap(iot, ioh, COM_NPORTS);
    100 	}
    101 
    102 	if (rv) {
    103 		ia->ia_iosize = COM_NPORTS;
    104 		ia->ia_msize = 0;
    105 	}
    106 	return (rv);
    107 }
    108 
    109 void
    110 com_isa_attach(parent, self, aux)
    111 	struct device *parent, *self;
    112 	void *aux;
    113 {
    114 	struct com_softc *sc = (void *)self;
    115 	int iobase, irq;
    116 	bus_space_tag_t iot;
    117 	struct isa_attach_args *ia = aux;
    118 
    119 	/*
    120 	 * We're living on an isa.
    121 	 */
    122 	iobase = sc->sc_iobase = ia->ia_iobase;
    123 	iot = sc->sc_iot = ia->ia_iot;
    124         if (iobase != comconsaddr) {
    125                 if (bus_space_map(iot, iobase, COM_NPORTS, 0, &sc->sc_ioh))
    126 			panic("comattach: io mapping failed");
    127 	} else
    128                 sc->sc_ioh = comconsioh;
    129 	irq = ia->ia_irq;
    130 
    131 	com_attach_subr(sc);
    132 
    133 	if (irq != IRQUNK) {
    134 		sc->sc_ih = isa_intr_establish(ia->ia_ic, irq,
    135 		    IST_EDGE, IPL_SERIAL, comintr, sc);
    136 	}
    137 
    138 	/*
    139 	 * Shutdown hook for buggy BIOSs that don't recognize the UART
    140 	 * without a disabled FIFO.
    141 	 */
    142 	if (shutdownhook_establish(com_isa_cleanup, sc) == NULL)
    143 		panic("comisa: could not establish shutdown hook");
    144 }
    145 
    146 void
    147 com_isa_cleanup(arg)
    148 	void *arg;
    149 {
    150 	struct com_softc *sc = arg;
    151 
    152 	if (ISSET(sc->sc_hwflags, COM_HW_FIFO))
    153 		bus_space_write_1(sc->sc_iot, sc->sc_ioh, com_fifo, 0);
    154 }
    155