sys/arch/mipsco/obio/if_le.c

   1 /*      $NetBSD: if_le.c,v 1.11 2008/04/04 12:25:06 tsutsui Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1996, 2000 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Adam Glass, Gordon W. Ross and Wayne Knowles
   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: if_le.c,v 1.11 2008/04/04 12:25:06 tsutsui Exp $");
  34
  35 #include "opt_inet.h"
  36 #include "bpfilter.h"
  37
  38 #include <sys/param.h>
  39 #include <sys/systm.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/syslog.h>
  42 #include <sys/socket.h>
  43 #include <sys/device.h>
  44
  45 #include <net/if.h>
  46 #include <net/if_ether.h>
  47 #include <net/if_media.h>
  48
  49 #ifdef INET
  50 #include <netinet/in.h>
  51 #include <netinet/if_inarp.h>
  52 #endif
  53
  54 #include <machine/cpu.h>
  55 #include <machine/mainboard.h>
  56 #include <machine/autoconf.h>
  57 #include <machine/bus.h>
  58
  59 #include <dev/ic/lancereg.h>
  60 #include <dev/ic/lancevar.h>
  61 #include <dev/ic/am7990reg.h>
  62 #include <dev/ic/am7990var.h>
  63
  64 /*
  65  * LANCE registers.
  66  */
  67
  68 #define LEREG1_RDP      2       /* Offset to LANCE data register */
  69 #define LEREG1_RAP      6       /* Offset to LANCE address register */
  70
  71 /*
  72  * Ethernet software status per interface.
  73  * The real stuff is in dev/ic/am7990var.h
  74  */
  75 struct  le_softc {
  76         struct am7990_softc     sc_am7990;      /* glue to MI code */
  77         bus_space_tag_t         sc_bustag;
  78         bus_dma_tag_t           sc_dmatag;
  79         bus_space_handle_t      sc_reg;         /* LANCE registers */
  80         bus_dmamap_t            sc_dmamap;
  81         struct evcnt            sc_intrcnt;     /* Interrupt event counter */
  82 };
  83
  84 static int      le_match(device_t, cfdata_t, void *);
  85 static void     le_attach(device_t, device_t, void *);
  86
  87 CFATTACH_DECL_NEW(le, sizeof(struct le_softc),
  88     le_match, le_attach, NULL, NULL);
  89
  90 static int le_attached;
  91
  92 #if defined(_KERNEL_OPT)
  93 #include "opt_ddb.h"
  94 #endif
  95
  96 #ifdef DDB
  97 #define integrate
  98 #define hide
  99 #else
 100 #define integrate       static inline
 101 #define hide            static
 102 #endif
 103
 104 int le_intr(void *);
 105
 106 hide void lewrcsr(struct lance_softc *, uint16_t, uint16_t);
 107 hide uint16_t lerdcsr(struct lance_softc *, uint16_t);
 108
 109 hide void
 110 lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
 111 {
 112         struct le_softc *lesc = (struct le_softc *)sc;
 113
 114         bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port);
 115         bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP, val);
 116 }
 117
 118 hide uint16_t
 119 lerdcsr(struct lance_softc *sc, uint16_t port)
 120 {
 121         struct le_softc *lesc = (struct le_softc *)sc;
 122
 123         bus_space_write_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RAP, port);
 124         return (bus_space_read_2(lesc->sc_bustag, lesc->sc_reg, LEREG1_RDP));
 125 }
 126
 127 int
 128 le_match(device_t parent, cfdata_t cf, void *aux)
 129 {
 130         struct confargs *ca = aux;
 131         int addr;
 132
 133         if (strcmp(ca->ca_name, "le"))
 134                 return 0;
 135
 136         if (le_attached)
 137                 return 0;
 138
 139         addr = LANCE_PORT;
 140         if (badaddr((void *)addr, 1))
 141                 return 0;
 142
 143         return 1;
 144 }
 145
 146 #define LE_MEMSIZE      (32*1024)
 147
 148 void
 149 le_attach(device_t parent, device_t self, void *aux)
 150 {
 151         struct le_softc *lesc = device_private(self);
 152         struct lance_softc *sc = &lesc->sc_am7990.lsc;
 153         struct confargs *ca = aux;
 154
 155         bus_dma_tag_t dmat;
 156         bus_dma_segment_t seg;
 157         int rseg;
 158         uint8_t *id;
 159         int i;
 160         void *kvaddr;
 161
 162         sc->sc_dev = self;
 163         id = (uint8_t *)ETHER_ID;
 164         lesc->sc_bustag = ca->ca_bustag;
 165         dmat = lesc->sc_dmatag = ca->ca_dmatag;
 166
 167         if (bus_space_map(ca->ca_bustag, ca->ca_addr,
 168                           8,    /* size */
 169                           BUS_SPACE_MAP_LINEAR,
 170                           &lesc->sc_reg) != 0) {
 171                 aprint_error(": cannot map registers\n");
 172                 return;
 173         }
 174
 175         /*
 176          * Allocate a physically contiguous DMA area for the chip.
 177          */
 178         if (bus_dmamem_alloc(dmat, LE_MEMSIZE, 0, 0, &seg, 1,
 179                              &rseg, BUS_DMA_NOWAIT)) {
 180                 aprint_error(": can't allocate DMA area\n");
 181                 return;
 182         }
 183         /* Map pages into kernel memory */
 184         if (bus_dmamem_map(dmat, &seg, rseg, LE_MEMSIZE,
 185             &kvaddr, BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) {
 186                 aprint_error(": can't map DMA area\n");
 187                 bus_dmamem_free(dmat, &seg, rseg);
 188                 return;
 189         }
 190         /* Build DMA map so we can get physical address */
 191         if (bus_dmamap_create(dmat, LE_MEMSIZE, 1, LE_MEMSIZE,
 192                               0, BUS_DMA_NOWAIT, &lesc->sc_dmamap)) {
 193                 aprint_error(": can't create DMA map\n");
 194                 goto bad;
 195         }
 196         if (bus_dmamap_load(dmat, lesc->sc_dmamap, kvaddr, LE_MEMSIZE,
 197                             NULL, BUS_DMA_NOWAIT)) {
 198                 aprint_error(": can't load DMA map\n");
 199                 goto bad;
 200         }
 201
 202         sc->sc_memsize = LE_MEMSIZE;    /* 16K Buffer space*/
 203         sc->sc_mem  = (void *)MIPS_PHYS_TO_KSEG1(kvaddr);
 204         sc->sc_addr = lesc->sc_dmamap->dm_segs[0].ds_addr;
 205
 206         sc->sc_conf3 = LE_C3_BSWP;
 207
 208         /* Copy Ethernet hardware address from NVRAM */
 209         for (i = 0; i < ETHER_ADDR_LEN; i++)
 210                 sc->sc_enaddr[i] = id[i * 4 + 3];       /* XXX */
 211
 212         sc->sc_copytodesc = lance_copytobuf_contig;
 213         sc->sc_copyfromdesc = lance_copyfrombuf_contig;
 214         sc->sc_copytobuf = lance_copytobuf_contig;
 215         sc->sc_copyfrombuf = lance_copyfrombuf_contig;
 216         sc->sc_zerobuf = lance_zerobuf_contig;
 217
 218         sc->sc_rdcsr = lerdcsr;
 219         sc->sc_wrcsr = lewrcsr;
 220         sc->sc_hwinit = NULL;
 221
 222         evcnt_attach_dynamic(&lesc->sc_intrcnt, EVCNT_TYPE_INTR, NULL,
 223                              device_xname(self), "intr");
 224         bus_intr_establish(lesc->sc_bustag, SYS_INTR_ETHER, 0, 0,
 225                            le_intr, lesc);
 226
 227         am7990_config(&lesc->sc_am7990);
 228         return;
 229
 230 bad:
 231         bus_dmamem_unmap(dmat, kvaddr, LE_MEMSIZE);
 232         bus_dmamem_free(dmat, &seg, rseg);
 233 }
 234
 235 int
 236 le_intr(void *arg)
 237 {
 238         struct le_softc *lesc = arg;
 239
 240         lesc->sc_intrcnt.ev_count++;
 241         return am7990_intr(&lesc->sc_am7990);
 242 }