bha_isa.c

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    1 /*      $NetBSD: bha_isa.c,v 1.24 2002/10/02 03:10:46 thorpej 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/cdefs.h>
   40 __KERNEL_RCSID(0, "$NetBSD: bha_isa.c,v 1.24 2002/10/02 03:10:46 thorpej Exp $");
   41 
   42 #include <sys/param.h>
   43 #include <sys/systm.h>
   44 #include <sys/device.h>
   45 
   46 #include <machine/bus.h>
   47 #include <machine/intr.h>
   48 
   49 #include <dev/scsipi/scsipi_all.h>
   50 #include <dev/scsipi/scsiconf.h>
   51 
   52 #include <dev/isa/isavar.h>
   53 #include <dev/isa/isadmavar.h>
   54 
   55 #include <dev/ic/bhareg.h>
   56 #include <dev/ic/bhavar.h>
   57 
   58 #define BHA_ISA_IOSIZE  4
   59 
   60 int     bha_isa_probe __P((struct device *, struct cfdata *, void *));
   61 void    bha_isa_attach __P((struct device *, struct device *, void *));
   62 
   63 CFATTACH_DECL(bha_isa, sizeof(struct bha_softc),
   64     bha_isa_probe, bha_isa_attach, NULL, NULL);
   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  */
   71 int
   72 bha_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         if (ia->ia_nio < 1)
   84                 return (0);
   85         if (ia->ia_nirq < 1)
   86                 return (0);
   87         if (ia->ia_ndrq < 1)
   88                 return (0);
   89 
   90         if (ISA_DIRECT_CONFIG(ia))
   91                 return (0);
   92 
   93         /* Disallow wildcarded i/o address. */
   94         if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT)
   95                 return (0);
   96 
   97         if (bus_space_map(iot, ia->ia_io[0].ir_addr, BHA_ISA_IOSIZE, 0, &ioh))
   98                 return (0);
   99 
  100         rv = bha_probe_inquiry(iot, ioh, &bpd);
  101 
  102         bus_space_unmap(iot, ioh, BHA_ISA_IOSIZE);
  103 
  104         if (rv) {
  105                 if (ia->ia_irq[0].ir_irq != ISACF_IRQ_DEFAULT &&
  106                     ia->ia_irq[0].ir_irq != bpd.sc_irq)
  107                         return (0);
  108                 if (ia->ia_drq[0].ir_drq != ISACF_DRQ_DEFAULT &&
  109                     ia->ia_drq[0].ir_drq != bpd.sc_drq)
  110                         return (0);
  111 
  112                 ia->ia_nio = 1;
  113                 ia->ia_io[0].ir_size = BHA_ISA_IOSIZE;
  114 
  115                 ia->ia_nirq = 1;
  116                 ia->ia_irq[0].ir_irq = bpd.sc_irq;
  117 
  118                 ia->ia_ndrq = 1;
  119                 ia->ia_drq[0].ir_drq = bpd.sc_drq;
  120 
  121                 ia->ia_niomem = 0;
  122         }
  123         return (rv);
  124 }
  125 
  126 /*
  127  * Attach all the sub-devices we can find
  128  */
  129 void
  130 bha_isa_attach(parent, self, aux)
  131         struct device *parent, *self;
  132         void *aux;
  133 {
  134         struct isa_attach_args *ia = aux;
  135         struct bha_softc *sc = (void *)self;
  136         bus_space_tag_t iot = ia->ia_iot;
  137         bus_space_handle_t ioh;
  138         struct bha_probe_data bpd;
  139         isa_chipset_tag_t ic = ia->ia_ic;
  140         int error;
  141 
  142         printf("\n");
  143 
  144         if (bus_space_map(iot, ia->ia_io[0].ir_addr, BHA_ISA_IOSIZE, 0, &ioh)) {
  145                 printf("%s: can't map i/o space\n", sc->sc_dev.dv_xname);
  146                 return;
  147         }
  148 
  149         sc->sc_iot = iot;
  150         sc->sc_ioh = ioh;
  151         sc->sc_dmat = ia->ia_dmat;
  152         if (!bha_probe_inquiry(iot, ioh, &bpd)) {
  153                 printf("%s: bha_isa_attach failed\n", sc->sc_dev.dv_xname);
  154                 return;
  155         }
  156 
  157         sc->sc_dmaflags = 0;
  158         if (bpd.sc_drq != -1) {
  159                 if ((error = isa_dmacascade(ic, bpd.sc_drq)) != 0) {
  160                         printf("%s: unable to cascade DRQ, error = %d\n",
  161                             sc->sc_dev.dv_xname, error);
  162                         return;
  163                 }
  164         } else {
  165                 /*
  166                  * We have a VLB controller.  If we're at least both
  167                  * hardware revision E and firmware revision 3.37,
  168                  * we can do 32-bit DMA (earlier revisions are buggy
  169                  * in this regard).
  170                  */
  171                 (void) bha_info(sc);
  172                 if (strcmp(sc->sc_firmware, "3.37") < 0)
  173                     printf("%s: buggy VLB controller, disabling 32-bit DMA\n",
  174                         sc->sc_dev.dv_xname);
  175                 else
  176                         sc->sc_dmaflags = ISABUS_DMA_32BIT;
  177         }
  178 
  179         sc->sc_ih = isa_intr_establish(ic, bpd.sc_irq, IST_EDGE, IPL_BIO,
  180             bha_intr, sc);
  181         if (sc->sc_ih == NULL) {
  182                 printf("%s: couldn't establish interrupt\n",
  183                     sc->sc_dev.dv_xname);
  184                 return;
  185         }
  186 
  187         bha_attach(sc);
  188 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/isa/bha_isa.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/isa/bha_isa.c