sys/dev/isa/bha_isa.c

   1 /*      $NetBSD: bha_isa.c,v 1.33 2009/05/12 08:44:19 cegger 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 1.33 2009/05/12 08:44:19 cegger 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
  53 int     bha_isa_probe(device_t, cfdata_t, void *);
  54 void    bha_isa_attach(device_t, device_t, void *);
  55
  56 CFATTACH_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  */
  64 int
  65 bha_isa_probe(device_t parent, cfdata_t match, void *aux)
  66 {
  67         struct isa_attach_args *ia = aux;
  68         bus_space_tag_t iot = ia->ia_iot;
  69         bus_space_handle_t ioh;
  70         struct bha_probe_data bpd;
  71         int rv;
  72
  73         if (ia->ia_nio < 1)
  74                 return (0);
  75         if (ia->ia_nirq < 1)
  76                 return (0);
  77         if (ia->ia_ndrq < 1)
  78                 return (0);
  79
  80         if (ISA_DIRECT_CONFIG(ia))
  81                 return (0);
  82
  83         /* Disallow wildcarded i/o address. */
  84         if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
  85                 return (0);
  86
  87         if (bus_space_map(iot, ia->ia_io[0].ir_addr, BHA_ISA_IOSIZE, 0, &ioh))
  88                 return (0);
  89
  90         rv = bha_probe_inquiry(iot, ioh, &bpd);
  91
  92         bus_space_unmap(iot, ioh, BHA_ISA_IOSIZE);
  93
  94         if (rv) {
  95                 if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ &&
  96                     ia->ia_irq[0].ir_irq != bpd.sc_irq)
  97                         return (0);
  98                 if (ia->ia_drq[0].ir_drq != ISA_UNKNOWN_DRQ &&
  99                     ia->ia_drq[0].ir_drq != bpd.sc_drq)
 100                         return (0);
 101
 102                 ia->ia_nio = 1;
 103                 ia->ia_io[0].ir_size = BHA_ISA_IOSIZE;
 104
 105                 ia->ia_nirq = 1;
 106                 ia->ia_irq[0].ir_irq = bpd.sc_irq;
 107
 108                 ia->ia_ndrq = 1;
 109                 ia->ia_drq[0].ir_drq = bpd.sc_drq;
 110
 111                 ia->ia_niomem = 0;
 112         }
 113         return (rv);
 114 }
 115
 116 /*
 117  * Attach all the sub-devices we can find
 118  */
 119 void
 120 bha_isa_attach(device_t parent, device_t self, void *aux)
 121 {
 122         struct isa_attach_args *ia = aux;
 123         struct bha_softc *sc = (void *)self;
 124         bus_space_tag_t iot = ia->ia_iot;
 125         bus_space_handle_t ioh;
 126         struct bha_probe_data bpd;
 127         isa_chipset_tag_t ic = ia->ia_ic;
 128         int error;
 129
 130         printf("\n");
 131
 132         if (bus_space_map(iot, ia->ia_io[0].ir_addr, BHA_ISA_IOSIZE, 0, &ioh)) {
 133                 aprint_error_dev(&sc->sc_dev, "can't map i/o space\n");
 134                 return;
 135         }
 136
 137         sc->sc_iot = iot;
 138         sc->sc_ioh = ioh;
 139         sc->sc_dmat = ia->ia_dmat;
 140         if (!bha_probe_inquiry(iot, ioh, &bpd)) {
 141                 aprint_error_dev(&sc->sc_dev, "bha_isa_attach failed\n");
 142                 return;
 143         }
 144
 145         sc->sc_dmaflags = 0;
 146         if (bpd.sc_drq != -1) {
 147                 if ((error = isa_dmacascade(ic, bpd.sc_drq)) != 0) {
 148                         aprint_error_dev(&sc->sc_dev, " unable to cascade DRQ, error = %d\n", error);
 149                         return;
 150                 }
 151         } else {
 152                 /*
 153                  * We have a VLB controller.  If we're at least both
 154                  * hardware revision E and firmware revision 3.37,
 155                  * we can do 32-bit DMA (earlier revisions are buggy
 156                  * in this regard).
 157                  */
 158                 (void) bha_info(sc);
 159                 if (strcmp(sc->sc_firmware, "3.37") < 0)
 160                     printf("%s: buggy VLB controller, disabling 32-bit DMA\n",
 161                         device_xname(&sc->sc_dev));
 162                 else
 163                         sc->sc_dmaflags = ISABUS_DMA_32BIT;
 164         }
 165
 166         sc->sc_ih = isa_intr_establish(ic, bpd.sc_irq, IST_EDGE, IPL_BIO,
 167             bha_intr, sc);
 168         if (sc->sc_ih == NULL) {
 169                 aprint_error_dev(&sc->sc_dev, "couldn't establish interrupt\n");
 170                 return;
 171         }
 172
 173         bha_attach(sc);
 174 }