bha_isa.c revision 1.32
1/* $NetBSD: bha_isa.c,v 1.32 2008/04/28 20:23:52 martin 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32#include <sys/cdefs.h> 33__KERNEL_RCSID(0, "$NetBSD: bha_isa.c,v 1.32 2008/04/28 20:23:52 martin Exp $"); 34 35#include <sys/param.h> 36#include <sys/systm.h> 37#include <sys/device.h> 38 39#include <sys/bus.h> 40#include <sys/intr.h> 41 42#include <dev/scsipi/scsipi_all.h> 43#include <dev/scsipi/scsiconf.h> 44 45#include <dev/isa/isavar.h> 46#include <dev/isa/isadmavar.h> 47 48#include <dev/ic/bhareg.h> 49#include <dev/ic/bhavar.h> 50 51#define BHA_ISA_IOSIZE 4 52 53int bha_isa_probe(struct device *, struct cfdata *, void *); 54void bha_isa_attach(struct device *, struct device *, void *); 55 56CFATTACH_DECL(bha_isa, sizeof(struct bha_softc), 57 bha_isa_probe, bha_isa_attach, NULL, NULL); 58 59/* 60 * Check the slots looking for a board we recognise 61 * If we find one, note it's address (slot) and call 62 * the actual probe routine to check it out. 63 */ 64int 65bha_isa_probe(struct device *parent, struct cfdata *match, 66 void *aux) 67{ 68 struct isa_attach_args *ia = aux; 69 bus_space_tag_t iot = ia->ia_iot; 70 bus_space_handle_t ioh; 71 struct bha_probe_data bpd; 72 int rv; 73 74 if (ia->ia_nio < 1) 75 return (0); 76 if (ia->ia_nirq < 1) 77 return (0); 78 if (ia->ia_ndrq < 1) 79 return (0); 80 81 if (ISA_DIRECT_CONFIG(ia)) 82 return (0); 83 84 /* Disallow wildcarded i/o address. */ 85 if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT) 86 return (0); 87 88 if (bus_space_map(iot, ia->ia_io[0].ir_addr, BHA_ISA_IOSIZE, 0, &ioh)) 89 return (0); 90 91 rv = bha_probe_inquiry(iot, ioh, &bpd); 92 93 bus_space_unmap(iot, ioh, BHA_ISA_IOSIZE); 94 95 if (rv) { 96 if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ && 97 ia->ia_irq[0].ir_irq != bpd.sc_irq) 98 return (0); 99 if (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ && 100 ia->ia_drq[0].ir_drq != bpd.sc_drq) 101 return (0); 102 103 ia->ia_nio = 1; 104 ia->ia_io[0].ir_size = BHA_ISA_IOSIZE; 105 106 ia->ia_nirq = 1; 107 ia->ia_irq[0].ir_irq = bpd.sc_irq; 108 109 ia->ia_ndrq = 1; 110 ia->ia_drq[0].ir_drq = bpd.sc_drq; 111 112 ia->ia_niomem = 0; 113 } 114 return (rv); 115} 116 117/* 118 * Attach all the sub-devices we can find 119 */ 120void 121bha_isa_attach(struct device *parent, struct device *self, 122 void *aux) 123{ 124 struct isa_attach_args *ia = aux; 125 struct bha_softc *sc = (void *)self; 126 bus_space_tag_t iot = ia->ia_iot; 127 bus_space_handle_t ioh; 128 struct bha_probe_data bpd; 129 isa_chipset_tag_t ic = ia->ia_ic; 130 int error; 131 132 printf("\n"); 133 134 if (bus_space_map(iot, ia->ia_io[0].ir_addr, BHA_ISA_IOSIZE, 0, &ioh)) { 135 aprint_error_dev(&sc->sc_dev, "can't map i/o space\n"); 136 return; 137 } 138 139 sc->sc_iot = iot; 140 sc->sc_ioh = ioh; 141 sc->sc_dmat = ia->ia_dmat; 142 if (!bha_probe_inquiry(iot, ioh, &bpd)) { 143 aprint_error_dev(&sc->sc_dev, "bha_isa_attach failed\n"); 144 return; 145 } 146 147 sc->sc_dmaflags = 0; 148 if (bpd.sc_drq != -1) { 149 if ((error = isa_dmacascade(ic, bpd.sc_drq)) != 0) { 150 aprint_error_dev(&sc->sc_dev, " unable to cascade DRQ, error = %d\n", error); 151 return; 152 } 153 } else { 154 /* 155 * We have a VLB controller. If we're at least both 156 * hardware revision E and firmware revision 3.37, 157 * we can do 32-bit DMA (earlier revisions are buggy 158 * in this regard). 159 */ 160 (void) bha_info(sc); 161 if (strcmp(sc->sc_firmware, "3.37") < 0) 162 printf("%s: buggy VLB controller, disabling 32-bit DMA\n", 163 device_xname(&sc->sc_dev)); 164 else 165 sc->sc_dmaflags = ISABUS_DMA_32BIT; 166 } 167 168 sc->sc_ih = isa_intr_establish(ic, bpd.sc_irq, IST_EDGE, IPL_BIO, 169 bha_intr, sc); 170 if (sc->sc_ih == NULL) { 171 aprint_error_dev(&sc->sc_dev, "couldn't establish interrupt\n"); 172 return; 173 } 174 175 bha_attach(sc); 176} 177