sys/arch/x68k/dev/scsirom.c

   1 /*      $NetBSD: scsirom.c,v 1.18 2008/06/25 08:14:59 isaki Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Minoura Makoto.
   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 /*
  33  * SCSI BIOS ROM.
  34  * Used to probe the board.
  35  */
  36
  37 #include <sys/cdefs.h>
  38 __KERNEL_RCSID(0, "$NetBSD: scsirom.c,v 1.18 2008/06/25 08:14:59 isaki Exp $");
  39
  40 #include <sys/param.h>
  41 #include <sys/systm.h>
  42 #include <sys/device.h>
  43
  44 #include <machine/bus.h>
  45 #include <machine/cpu.h>
  46
  47 #include <arch/x68k/dev/intiovar.h>
  48 #include <arch/x68k/dev/scsiromvar.h>
  49
  50 struct {
  51         paddr_t addr, devaddr;
  52         int intr;
  53         const char id[7];
  54 } scsirom_descr[] = {{
  55         0x00fc0000, 0x00e96020, 108, "SCSIIN"
  56 }, {
  57         0x00ea0020, 0x00ea0000, 246, "SCSIEX"
  58 }};
  59
  60 #define SCSIROM_ID      0x24
  61
  62 /*
  63  * autoconf stuff
  64  */
  65 static int scsirom_find(device_t, struct intio_attach_args *);
  66 static int scsirom_match(device_t, cfdata_t, void *);
  67 static void scsirom_attach(device_t, device_t, void *);
  68
  69 CFATTACH_DECL_NEW(scsirom, sizeof(struct scsirom_softc),
  70     scsirom_match, scsirom_attach, NULL, NULL);
  71
  72 static int
  73 scsirom_find(device_t parent, struct intio_attach_args *ia)
  74 {
  75         bus_space_handle_t ioh;
  76         char buf[10];
  77         int which;
  78         int r = -1;
  79
  80         if (ia->ia_addr == scsirom_descr[INTERNAL].addr)
  81                 which = INTERNAL;
  82         else if (ia->ia_addr == scsirom_descr[EXTERNAL].addr)
  83                 which = EXTERNAL;
  84         else
  85                 return -1;
  86
  87         ia->ia_size = 0x1fe0;
  88         if (intio_map_allocate_region(parent, ia, INTIO_MAP_TESTONLY))
  89                 return -1;
  90
  91         if (bus_space_map(ia->ia_bst, ia->ia_addr, ia->ia_size, 0, &ioh) < 0)
  92                 return -1;
  93         if (badaddr((void *)IIOV(ia->ia_addr+SCSIROM_ID))) {
  94                 bus_space_unmap(ia->ia_bst, ioh, ia->ia_size);
  95                 return -1;
  96         }
  97         bus_space_read_region_1(ia->ia_bst, ioh, SCSIROM_ID, buf, 6);
  98         if (memcmp(buf, scsirom_descr[which].id, 6) == 0)
  99                 r = which;
 100         bus_space_unmap(ia->ia_bst, ioh, ia->ia_size);
 101
 102         return r;
 103 }
 104
 105 static int
 106 scsirom_match(device_t parent, cfdata_t cf, void *aux)
 107 {
 108         struct intio_attach_args *ia = aux;
 109         int r;
 110
 111         if (strcmp(ia->ia_name, "scsirom") != 0)
 112                 return 0;
 113
 114         if (ia->ia_addr == INTIOCF_ADDR_DEFAULT) {
 115                 ia->ia_addr = scsirom_descr[0].addr;
 116                 r = scsirom_find(parent, ia);
 117                 if (r == INTERNAL)
 118                         return 1;
 119                 ia->ia_addr = scsirom_descr[1].addr;
 120                 r = scsirom_find(parent, ia);
 121                 if (r == EXTERNAL)
 122                         return 1;
 123                 return 0;
 124         } else if (scsirom_find(parent, ia) >= 0)
 125                 return 1;
 126         else
 127                 return 0;
 128 }
 129
 130 static void
 131 scsirom_attach(device_t parent, device_t self, void *aux)
 132 {
 133         struct scsirom_softc *sc = device_private(self);
 134         struct intio_attach_args *ia = aux;
 135         int r;
 136         cfdata_t cf;
 137
 138         sc->sc_addr = ia->ia_addr;
 139         sc->sc_which = scsirom_find(parent, ia);
 140 #ifdef DIAGNOSTIC
 141         if (sc->sc_which < 0)
 142                 panic("SCSIROM curruption??");
 143 #endif
 144         r = intio_map_allocate_region(parent, ia, INTIO_MAP_ALLOCATE);
 145 #ifdef DIAGNOSTIC
 146         if (r)
 147                 panic("IO map for SCSIROM corruption??");
 148 #endif
 149
 150         ia->ia_addr = scsirom_descr[sc->sc_which].devaddr;
 151         if (ia->ia_intr == INTIOCF_INTR_DEFAULT)
 152                 ia->ia_intr = scsirom_descr[sc->sc_which].intr;
 153
 154         if (sc->sc_which == INTERNAL)
 155                 aprint_normal(": On-board at %p\n", (void *)ia->ia_addr);
 156         else
 157                 aprint_normal(": External at %p\n", (void *)ia->ia_addr);
 158
 159         cf = config_search_ia(NULL, self, "scsirom", ia);
 160         if (cf) {
 161                 config_attach(self, cf, ia, NULL);
 162         } else {
 163                 aprint_normal_dev(self, "no matching device; ignored.\n");
 164         }
 165
 166         return;
 167 }