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aha_isa.c revision 1.11 
      1 /*	$NetBSD: aha_isa.c,v 1.11 1998/08/15 10:10:51 mycroft 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/types.h>
     40 #include <sys/param.h>
     41 #include <sys/systm.h>
     42 #include <sys/device.h>
     43 
     44 #include <machine/bus.h>
     45 #include <machine/intr.h>
     46 
     47 #include <dev/scsipi/scsi_all.h>
     48 #include <dev/scsipi/scsipi_all.h>
     49 #include <dev/scsipi/scsiconf.h>
     50 
     51 #include <dev/isa/isavar.h>
     52 #include <dev/isa/isadmavar.h>
     53 
     54 #include <dev/ic/ahareg.h>
     55 #include <dev/ic/ahavar.h>
     56 
     57 #define	AHA_ISA_IOSIZE	4
     58 
     59 int	aha_isa_probe __P((struct device *, struct cfdata *, void *));
     60 void	aha_isa_attach __P((struct device *, struct device *, void *));
     61 
     62 struct cfattach aha_isa_ca = {
     63 	sizeof(struct aha_softc), aha_isa_probe, aha_isa_attach
     64 };
     65 
     66 /*
     67  * Check the slots looking for a board we recognise
     68  * If we find one, note it's address (slot) and call
     69  * the actual probe routine to check it out.
     70  */
     71 int
     72 aha_isa_probe(parent, match, aux)
     73 	struct device *parent;
     74 	struct cfdata *match;
     75 	void *aux;
     76 {
     77 	struct isa_attach_args *ia = aux;
     78 	bus_space_tag_t iot = ia->ia_iot;
     79 	bus_space_handle_t ioh;
     80 	struct aha_probe_data apd;
     81 	int rv;
     82 
     83 	/* Disallow wildcarded i/o address. */
     84 	if (ia->ia_iobase == ISACF_PORT_DEFAULT)
     85 		return (0);
     86 
     87 	if (bus_space_map(iot, ia->ia_iobase, AHA_ISA_IOSIZE, 0, &ioh))
     88 		return (0);
     89 
     90 	rv = aha_find(iot, ioh, &apd);
     91 
     92 	bus_space_unmap(iot, ioh, AHA_ISA_IOSIZE);
     93 
     94 	if (rv) {
     95 		if (ia->ia_irq != -1 && ia->ia_irq != apd.sc_irq)
     96 			return (0);
     97 		if (ia->ia_drq != -1 && ia->ia_drq != apd.sc_drq)
     98 			return (0);
     99 		ia->ia_irq = apd.sc_irq;
    100 		ia->ia_drq = apd.sc_drq;
    101 		ia->ia_msize = 0;
    102 		ia->ia_iosize = AHA_ISA_IOSIZE;
    103 	}
    104 	return (rv);
    105 }
    106 
    107 /*
    108  * Attach all the sub-devices we can find
    109  */
    110 void
    111 aha_isa_attach(parent, self, aux)
    112 	struct device *parent, *self;
    113 	void *aux;
    114 {
    115 	struct isa_attach_args *ia = aux;
    116 	struct aha_softc *sc = (void *)self;
    117 	bus_space_tag_t iot = ia->ia_iot;
    118 	bus_space_handle_t ioh;
    119 	struct aha_probe_data apd;
    120 	isa_chipset_tag_t ic = ia->ia_ic;
    121 	int error;
    122 
    123 	printf("\n");
    124 
    125 	if (bus_space_map(iot, ia->ia_iobase, AHA_ISA_IOSIZE, 0, &ioh)) {
    126 		printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
    127 		return;
    128 	}
    129 
    130 	sc->sc_iot = iot;
    131 	sc->sc_ioh = ioh;
    132 	sc->sc_dmat = ia->ia_dmat;
    133 	if (!aha_find(iot, ioh, &apd)) {
    134 		printf("%s: aha_find failed\n", sc->sc_dev.dv_xname);
    135 		return;
    136 	}
    137 
    138 	if (apd.sc_drq != -1) {
    139 		if ((error = isa_dmacascade(ic, apd.sc_drq)) != 0) {
    140 			printf("%s: unable to cascade DRQ, error = %d\n",
    141 			    sc->sc_dev.dv_xname, error);
    142 			return;
    143 		}
    144 	}
    145 
    146 	sc->sc_ih = isa_intr_establish(ic, apd.sc_irq, IST_EDGE, IPL_BIO,
    147 	    aha_intr, sc);
    148 	if (sc->sc_ih == NULL) {
    149 		printf("%s: couldn't establish interrupt\n",
    150 		    sc->sc_dev.dv_xname);
    151 		return;
    152 	}
    153 
    154 	aha_attach(sc, &apd);
    155 }
    156