sys/arch/dreamcast/dev/g2/if_mbe_g2.c

   1 /*      $NetBSD: if_mbe_g2.c,v 1.6 2007/03/12 14:03:48 tsutsui Exp $    */
   2
   3 /*
   4  * Copyright (c) 2002 Christian Groessler
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. The name of the author may not be used to endorse or promote products
  16  *    derived from this software without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  21  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  23  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  25  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  26  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 /*
  32  * All Rights Reserved, Copyright (C) Fujitsu Limited 1995
  33  *
  34  * This software may be used, modified, copied, distributed, and sold, in
  35  * both source and binary form provided that the above copyright, these
  36  * terms and the following disclaimer are retained.  The name of the author
  37  * and/or the contributor may not be used to endorse or promote products
  38  * derived from this software without specific prior written permission.
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND THE CONTRIBUTOR ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR THE CONTRIBUTOR BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION.
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  */
  52
  53 /*
  54  * Portions copyright (C) 1993, David Greenman.  This software may be used,
  55  * modified, copied, distributed, and sold, in both source and binary form
  56  * provided that the above copyright and these terms are retained.  Under no
  57  * circumstances is the author responsible for the proper functioning of this
  58  * software, nor does the author assume any responsibility for damages
  59  * incurred with its use.
  60  */
  61
  62 /*
  63  * Driver for Sega LAN Adapter (HIT-0300)
  64  */
  65
  66 #include <sys/cdefs.h>
  67 __KERNEL_RCSID(0, "$NetBSD: if_mbe_g2.c,v 1.6 2007/03/12 14:03:48 tsutsui Exp $");
  68
  69 #include <sys/param.h>
  70 #include <sys/systm.h>
  71 #include <sys/device.h>
  72
  73 #include <net/if.h>
  74 #include <net/if_ether.h>
  75 #include <net/if_media.h>
  76
  77 #include <machine/bus.h>
  78 #include <machine/intr.h>
  79 #include <machine/sysasicvar.h>
  80 #include <machine/cpu.h>
  81
  82 #include <dev/ic/mb86960reg.h>
  83 #include <dev/ic/mb86960var.h>
  84
  85 #include <dreamcast/dev/g2/g2busvar.h>
  86
  87
  88 int     mbe_g2_match(device_t, cfdata_t, void *);
  89 void    mbe_g2_attach(device_t, device_t, void *);
  90 static int mbe_g2_detect(bus_space_tag_t, bus_space_handle_t, uint8_t *);
  91
  92 struct mbe_g2_softc {
  93         struct  mb86960_softc sc_mb86960;       /* real "mb86960" softc */
  94 };
  95
  96 CFATTACH_DECL_NEW(mbe_g2bus, sizeof(struct mbe_g2_softc),
  97     mbe_g2_match, mbe_g2_attach, NULL, NULL);
  98
  99 #define LANA_NPORTS (0x20 * 4)
 100
 101 #ifdef LANA_DEBUG
 102 #define DPRINTF printf
 103 #else
 104 #define DPRINTF while (/* CONSTCOND */0) printf
 105 #endif
 106
 107 static struct dreamcast_bus_space mbe_g2_dbs;
 108
 109 /*
 110  * Determine if the device is present.
 111  */
 112 int
 113 mbe_g2_match(device_t parent, cfdata_t cf, void *aux)
 114 {
 115         struct g2bus_attach_args *ga = aux;
 116         bus_space_handle_t memh;
 117         struct dreamcast_bus_space dbs;
 118         bus_space_tag_t memt = &dbs;
 119         static int lanafound;
 120         int rv;
 121         uint8_t myea[ETHER_ADDR_LEN];
 122
 123         if (lanafound)
 124                 return 0;
 125
 126         if (strcmp("mbe", cf->cf_name))
 127                 return 0;
 128
 129         memcpy(memt, ga->ga_memt, sizeof(struct dreamcast_bus_space));
 130         g2bus_set_bus_mem_sparse(memt);
 131
 132         /* Map i/o ports. */
 133         if (bus_space_map(memt, 0x00600400, LANA_NPORTS, 0, &memh)) {
 134                 DPRINTF("%s: couldn't map iospace 0x%x\n",
 135                     __func__, 0x00600400);
 136                 return 0;
 137         }
 138
 139         rv = 0;
 140         if (mbe_g2_detect(memt, memh, myea) == 0) {
 141                 DPRINTF("%s: LAN Adapter detection failed\n", __func__);
 142                 goto out;
 143         }
 144
 145         rv = 1;
 146         lanafound = 1;
 147  out:
 148         bus_space_unmap(memt, memh, LANA_NPORTS);
 149         return rv;
 150 }
 151
 152
 153 /*
 154  * Determine type and ethernet address.
 155  */
 156 static int
 157 mbe_g2_detect(bus_space_tag_t iot, bus_space_handle_t ioh, uint8_t *enaddr)
 158 {
 159         uint8_t eeprom[FE_EEPROM_SIZE];
 160
 161         /* Read the chip type */
 162         if ((bus_space_read_1(iot, ioh, FE_DLCR7) & FE_D7_IDENT) !=
 163             FE_D7_IDENT_86967) {
 164                 DPRINTF("%s: unknown chip type\n", __func__);
 165                 return 0;
 166         }
 167
 168         memset(eeprom, 0, FE_EEPROM_SIZE);
 169
 170         /* Get our station address from EEPROM. */
 171         mb86965_read_eeprom(iot, ioh, eeprom);
 172         memcpy(enaddr, eeprom, ETHER_ADDR_LEN);
 173
 174         DPRINTF("Ethernet address: %s\n", ether_sprintf(enaddr));
 175
 176         /* Make sure we got a valid station address. */
 177         if ((enaddr[0] & 0x03) != 0x00 ||
 178             (enaddr[0] == 0x00 && enaddr[1] == 0x00 && enaddr[2] == 0x00)) {
 179                 DPRINTF("%s: invalid ethernet address\n", __func__);
 180                 return 0;
 181         }
 182
 183         return 1;
 184 }
 185
 186 void
 187 mbe_g2_attach(device_t parent, device_t self, void *aux)
 188 {
 189         struct mbe_g2_softc *isc = device_private(self);
 190         struct mb86960_softc *sc = &isc->sc_mb86960;
 191         struct g2bus_attach_args *ga = aux;
 192         bus_space_tag_t memt = &mbe_g2_dbs;
 193         bus_space_handle_t memh;
 194         uint8_t myea[ETHER_ADDR_LEN];
 195
 196         sc->sc_dev = self;
 197
 198         memcpy(memt, ga->ga_memt, sizeof(struct dreamcast_bus_space));
 199         g2bus_set_bus_mem_sparse(memt);
 200
 201         /* Map i/o ports. */
 202         if (bus_space_map(memt, 0x00600400, LANA_NPORTS, 0, &memh)) {
 203                 aprint_error(": can't map i/o space\n");
 204                 return;
 205         }
 206
 207         sc->sc_bst = memt;
 208         sc->sc_bsh = memh;
 209
 210         /* Determine the card type. */
 211         if (mbe_g2_detect(memt, memh, myea) == 0) {
 212                 aprint_error(": where did the card go?!\n");
 213                 panic("unknown card");
 214         }
 215
 216         aprint_normal(": Sega LAN-Adapter Ethernet\n");
 217
 218         /* This interface is always enabled. */
 219         sc->sc_stat |= FE_STAT_ENABLED;
 220
 221         /* The LAN-Adapter uses 8 bit bus mode and slow SRAM. */
 222         sc->sc_flags |= FE_FLAGS_SBW_BYTE | FE_FLAGS_SRAM_150ns;
 223
 224         /*
 225          * Do generic MB86960 attach.
 226          */
 227         mb86960_attach(sc, myea);
 228
 229         mb86960_config(sc, NULL, 0, 0);
 230
 231         sysasic_intr_establish(SYSASIC_EVENT_8BIT, IPL_NET, SYSASIC_IRL11,
 232             mb86960_intr, sc);
 233 }