bha_isa.c revision 1.7
1/* $NetBSD: bha_isa.c,v 1.7 1997/06/06 23:43:48 thorpej Exp $ */ 2 3/* 4 * Copyright (c) 1994, 1996, 1997 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#ifdef __BROKEN_INDIRECT_CONFIG 52int bha_isa_probe __P((struct device *, void *, void *)); 53#else 54int bha_isa_probe __P((struct device *, struct cfdata *, void *)); 55#endif 56void bha_isa_attach __P((struct device *, struct device *, void *)); 57 58struct cfattach bha_isa_ca = { 59 sizeof(struct bha_softc), bha_isa_probe, bha_isa_attach 60}; 61 62/* 63 * Check the slots looking for a board we recognise 64 * If we find one, note it's address (slot) and call 65 * the actual probe routine to check it out. 66 */ 67int 68bha_isa_probe(parent, match, aux) 69 struct device *parent; 70#ifdef __BROKEN_INDIRECT_CONFIG 71 void *match; 72#else 73 struct cfdata *match; 74#endif 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 bha_probe_data bpd; 81 int rv; 82 83 if (bus_space_map(iot, ia->ia_iobase, BHA_ISA_IOSIZE, 0, &ioh)) 84 return (0); 85 86 rv = bha_find(iot, ioh, &bpd); 87 88 bus_space_unmap(iot, ioh, BHA_ISA_IOSIZE); 89 90 if (rv) { 91 if (ia->ia_irq != -1 && ia->ia_irq != bpd.sc_irq) 92 return (0); 93 if (ia->ia_drq != -1 && ia->ia_drq != bpd.sc_drq) 94 return (0); 95 ia->ia_irq = bpd.sc_irq; 96 ia->ia_drq = bpd.sc_drq; 97 ia->ia_msize = 0; 98 ia->ia_iosize = BHA_ISA_IOSIZE; 99 } 100 return (rv); 101} 102 103/* 104 * Attach all the sub-devices we can find 105 */ 106void 107bha_isa_attach(parent, self, aux) 108 struct device *parent, *self; 109 void *aux; 110{ 111 struct isa_attach_args *ia = aux; 112 struct bha_softc *sc = (void *)self; 113 bus_space_tag_t iot = ia->ia_iot; 114 bus_space_handle_t ioh; 115 struct bha_probe_data bpd; 116 isa_chipset_tag_t ic = ia->ia_ic; 117 118 printf("\n"); 119 120 if (bus_space_map(iot, ia->ia_iobase, BHA_ISA_IOSIZE, 0, &ioh)) 121 panic("bha_isa_attach: bus_space_map failed"); 122 123 sc->sc_iot = iot; 124 sc->sc_ioh = ioh; 125 sc->sc_dmat = ia->ia_dmat; 126 if (!bha_find(iot, ioh, &bpd)) 127 panic("bha_isa_attach: bha_find failed"); 128 129 sc->sc_dmaflags = 0; 130 if (bpd.sc_drq != -1) 131 isa_dmacascade(parent, bpd.sc_drq); 132 else { 133 /* 134 * We have a VLB controller. If we're at least both 135 * hardware revision E and firmware revision 3.37, 136 * we can do 32-bit DMA (earlier revisions are buggy 137 * in this regard). 138 */ 139 bha_inquire_setup_information(sc); 140 if (strcmp(sc->sc_firmware, "3.37") < 0) 141 printf("%s: buggy VLB controller, disabling 32-bit DMA\n", 142 sc->sc_dev.dv_xname); 143 else 144 sc->sc_dmaflags = ISABUS_DMA_32BIT; 145 } 146 147 sc->sc_ih = isa_intr_establish(ic, bpd.sc_irq, IST_EDGE, IPL_BIO, 148 bha_intr, sc); 149 if (sc->sc_ih == NULL) { 150 printf("%s: couldn't establish interrupt\n", 151 sc->sc_dev.dv_xname); 152 return; 153 } 154 155 bha_attach(sc, &bpd); 156} 157