bha_isa.c revision 1.16
1/* $NetBSD: bha_isa.c,v 1.16 2000/10/03 14:07:37 simonb 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/bhareg.h> 55#include <dev/ic/bhavar.h> 56 57#define BHA_ISA_IOSIZE 4 58 59int bha_isa_probe __P((struct device *, struct cfdata *, void *)); 60void bha_isa_attach __P((struct device *, struct device *, void *)); 61 62struct cfattach bha_isa_ca = { 63 sizeof(struct bha_softc), bha_isa_probe, bha_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 */ 71int 72bha_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 bha_probe_data bpd; 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, BHA_ISA_IOSIZE, 0, &ioh)) 88 return (0); 89 90 rv = bha_find(iot, ioh, &bpd); 91 92 bus_space_unmap(iot, ioh, BHA_ISA_IOSIZE); 93 94 if (rv) { 95 if (ia->ia_irq != -1 && ia->ia_irq != bpd.sc_irq) 96 return (0); 97 if (ia->ia_drq != -1 && ia->ia_drq != bpd.sc_drq) 98 return (0); 99 ia->ia_irq = bpd.sc_irq; 100 ia->ia_drq = bpd.sc_drq; 101 ia->ia_msize = 0; 102 ia->ia_iosize = BHA_ISA_IOSIZE; 103 } 104 return (rv); 105} 106 107/* 108 * Attach all the sub-devices we can find 109 */ 110void 111bha_isa_attach(parent, self, aux) 112 struct device *parent, *self; 113 void *aux; 114{ 115 struct isa_attach_args *ia = aux; 116 struct bha_softc *sc = (void *)self; 117 bus_space_tag_t iot = ia->ia_iot; 118 bus_space_handle_t ioh; 119 struct bha_probe_data bpd; 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, BHA_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 (!bha_find(iot, ioh, &bpd)) { 134 printf("%s: bha_find failed\n", sc->sc_dev.dv_xname); 135 return; 136 } 137 138 sc->sc_dmaflags = 0; 139 if (bpd.sc_drq != -1) { 140 if ((error = isa_dmacascade(ic, bpd.sc_drq)) != 0) { 141 printf("%s: unable to cascade DRQ, error = %d\n", 142 sc->sc_dev.dv_xname, error); 143 return; 144 } 145 } else { 146 /* 147 * We have a VLB controller. If we're at least both 148 * hardware revision E and firmware revision 3.37, 149 * we can do 32-bit DMA (earlier revisions are buggy 150 * in this regard). 151 */ 152 bha_inquire_setup_information(sc); 153 if (strcmp(sc->sc_firmware, "3.37") < 0) 154 printf("%s: buggy VLB controller, disabling 32-bit DMA\n", 155 sc->sc_dev.dv_xname); 156 else 157 sc->sc_dmaflags = ISABUS_DMA_32BIT; 158 } 159 160 sc->sc_ih = isa_intr_establish(ic, bpd.sc_irq, IST_EDGE, IPL_BIO, 161 bha_intr, sc); 162 if (sc->sc_ih == NULL) { 163 printf("%s: couldn't establish interrupt\n", 164 sc->sc_dev.dv_xname); 165 return; 166 } 167 168 bha_attach(sc, &bpd); 169} 170