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bha_isa.c revision 1.4 
      1 /*	$NetBSD: bha_isa.c,v 1.4 1996/10/13 01:37:36 christos Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1994, 1996 Charles M. Hannum.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Charles M. Hannum.
     17  * 4. The name of the author may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/types.h>
     33 #include <sys/param.h>
     34 #include <sys/systm.h>
     35 #include <sys/device.h>
     36 
     37 #include <machine/bus.h>
     38 #include <machine/intr.h>
     39 
     40 #include <scsi/scsi_all.h>
     41 #include <scsi/scsiconf.h>
     42 
     43 #include <dev/isa/isavar.h>
     44 #include <dev/isa/isadmavar.h>
     45 
     46 #include <dev/ic/bhareg.h>
     47 #include <dev/ic/bhavar.h>
     48 
     49 #define	BHA_ISA_IOSIZE	4
     50 
     51 int	bha_isa_probe __P((struct device *, void *, void *));
     52 void	bha_isa_attach __P((struct device *, struct device *, void *));
     53 
     54 struct cfattach bha_isa_ca = {
     55 	sizeof(struct bha_softc), bha_isa_probe, bha_isa_attach
     56 };
     57 
     58 /*
     59  * Check the slots looking for a board we recognise
     60  * If we find one, note it's address (slot) and call
     61  * the actual probe routine to check it out.
     62  */
     63 int
     64 bha_isa_probe(parent, match, aux)
     65 	struct device *parent;
     66 	void *match, *aux;
     67 {
     68 	struct isa_attach_args *ia = aux;
     69 	struct bha_softc sc;
     70 	bus_chipset_tag_t bc = ia->ia_bc;
     71 	bus_io_handle_t ioh;
     72 	int rv;
     73 
     74 	if (bus_io_map(bc, ia->ia_iobase, BHA_ISA_IOSIZE, &ioh))
     75 		return (0);
     76 
     77 	rv = bha_find(bc, ioh, &sc);
     78 
     79 	bus_io_unmap(bc, ioh, BHA_ISA_IOSIZE);
     80 
     81 	if (rv) {
     82 		if (ia->ia_irq != -1 && ia->ia_irq != sc.sc_irq)
     83 			return (0);
     84 		if (ia->ia_drq != -1 && ia->ia_drq != sc.sc_drq)
     85 			return (0);
     86 		ia->ia_irq = sc.sc_irq;
     87 		ia->ia_drq = sc.sc_drq;
     88 		ia->ia_msize = 0;
     89 		ia->ia_iosize = BHA_ISA_IOSIZE;
     90 	}
     91 	return (rv);
     92 }
     93 
     94 /*
     95  * Attach all the sub-devices we can find
     96  */
     97 void
     98 bha_isa_attach(parent, self, aux)
     99 	struct device *parent, *self;
    100 	void *aux;
    101 {
    102 	struct isa_attach_args *ia = aux;
    103 	struct bha_softc *sc = (void *)self;
    104 	bus_chipset_tag_t bc = ia->ia_bc;
    105 	bus_io_handle_t ioh;
    106 	isa_chipset_tag_t ic = ia->ia_ic;
    107 
    108 	printf("\n");
    109 
    110 	if (bus_io_map(bc, ia->ia_iobase, BHA_ISA_IOSIZE, &ioh))
    111 		panic("bha_attach: bus_io_map failed!");
    112 
    113 	sc->sc_bc = bc;
    114 	sc->sc_ioh = ioh;
    115 	if (!bha_find(bc, ioh, sc))
    116 		panic("bha_attach: bha_find failed!");
    117 
    118 	if (sc->sc_drq != -1)
    119 		isa_dmacascade(sc->sc_drq);
    120 
    121 	sc->sc_ih = isa_intr_establish(ic, sc->sc_irq, IST_EDGE, IPL_BIO,
    122 	    bha_intr, sc);
    123 	if (sc->sc_ih == NULL) {
    124 		printf("%s: couldn't establish interrupt\n",
    125 		    sc->sc_dev.dv_xname);
    126 		return;
    127 	}
    128 
    129 	bha_attach(sc);
    130 }
    131