sys/dev/sbus/if_le_lebuffer.c

   1 /*      $NetBSD: if_le_lebuffer.c,v 1.26 2009/09/08 18:31:36 tsutsui Exp $      */
   2
   3 /*-
   4  * Copyright (c) 1997, 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; Jason R. Thorpe of the Numerical Aerospace
   9  * Simulation Facility, NASA Ames Research Center; Paul Kranenburg.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #include <sys/cdefs.h>
  34 __KERNEL_RCSID(0, "$NetBSD: if_le_lebuffer.c,v 1.26 2009/09/08 18:31:36 tsutsui Exp $");
  35
  36 #include "opt_inet.h"
  37 #include "bpfilter.h"
  38
  39 #include <sys/param.h>
  40 #include <sys/systm.h>
  41 #include <sys/mbuf.h>
  42 #include <sys/syslog.h>
  43 #include <sys/socket.h>
  44 #include <sys/device.h>
  45 #include <sys/malloc.h>
  46
  47 #include <net/if.h>
  48 #include <net/if_ether.h>
  49 #include <net/if_media.h>
  50
  51 #ifdef INET
  52 #include <netinet/in.h>
  53 #include <netinet/if_inarp.h>
  54 #endif
  55
  56 #include <sys/bus.h>
  57 #include <sys/intr.h>
  58 #include <machine/autoconf.h>
  59
  60 #include <dev/sbus/sbusvar.h>
  61 #include <dev/sbus/lebuffervar.h>
  62
  63 #include <dev/ic/lancereg.h>
  64 #include <dev/ic/lancevar.h>
  65 #include <dev/ic/am7990reg.h>
  66 #include <dev/ic/am7990var.h>
  67
  68 #include "ioconf.h"
  69
  70 /*
  71  * LANCE registers.
  72  */
  73 #define LEREG1_RDP      0       /* Register Data port */
  74 #define LEREG1_RAP      2       /* Register Address port */
  75
  76 struct  le_softc {
  77         struct  am7990_softc    sc_am7990;      /* glue to MI code */
  78         bus_space_tag_t         sc_bustag;
  79         bus_dma_tag_t           sc_dmatag;
  80         bus_space_handle_t      sc_reg;         /* LANCE registers */
  81 };
  82
  83
  84 int     lematch_lebuffer(device_t, cfdata_t, void *);
  85 void    leattach_lebuffer(device_t, device_t, void *);
  86
  87 /*
  88  * Media types supported.
  89  */
  90 static int lemedia[] = {
  91         IFM_ETHER|IFM_10_T,
  92 };
  93 #define NLEMEDIA        __arraycount(lemedia)
  94
  95 CFATTACH_DECL_NEW(le_lebuffer, sizeof(struct le_softc),
  96     lematch_lebuffer, leattach_lebuffer, NULL, NULL);
  97
  98 #if defined(_KERNEL_OPT)
  99 #include "opt_ddb.h"
 100 #endif
 101
 102 static void lewrcsr(struct lance_softc *, uint16_t, uint16_t);
 103 static uint16_t lerdcsr(struct lance_softc *, uint16_t);
 104
 105 static void
 106 lewrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
 107 {
 108         struct le_softc *lesc = (struct le_softc *)sc;
 109         bus_space_tag_t t = lesc->sc_bustag;
 110         bus_space_handle_t h = lesc->sc_reg;
 111
 112         bus_space_write_2(t, h, LEREG1_RAP, port);
 113         bus_space_write_2(t, h, LEREG1_RDP, val);
 114
 115 #if defined(SUN4M)
 116         /*
 117          * We need to flush the Sbus->Mbus write buffers. This can most
 118          * easily be accomplished by reading back the register that we
 119          * just wrote (thanks to Chris Torek for this solution).
 120          */
 121         (void)bus_space_read_2(t, h, LEREG1_RDP);
 122 #endif
 123 }
 124
 125 static uint16_t
 126 lerdcsr(struct lance_softc *sc, uint16_t port)
 127 {
 128         struct le_softc *lesc = (struct le_softc *)sc;
 129         bus_space_tag_t t = lesc->sc_bustag;
 130         bus_space_handle_t h = lesc->sc_reg;
 131
 132         bus_space_write_2(t, h, LEREG1_RAP, port);
 133         return (bus_space_read_2(t, h, LEREG1_RDP));
 134 }
 135
 136 int
 137 lematch_lebuffer(device_t parent, cfdata_t cf, void *aux)
 138 {
 139         struct sbus_attach_args *sa = aux;
 140
 141         return (strcmp(cf->cf_name, sa->sa_name) == 0);
 142 }
 143
 144
 145 void
 146 leattach_lebuffer(device_t parent, device_t self, void *aux)
 147 {
 148         struct le_softc *lesc = device_private(self);
 149         struct lance_softc *sc = &lesc->sc_am7990.lsc;
 150         struct lebuf_softc *lebuf = device_private(parent);
 151         struct sbus_attach_args *sa = aux;
 152
 153         sc->sc_dev = self;
 154         lesc->sc_bustag = sa->sa_bustag;
 155         lesc->sc_dmatag = sa->sa_dmatag;
 156
 157         if (sbus_bus_map(sa->sa_bustag,
 158                          sa->sa_slot,
 159                          sa->sa_offset,
 160                          sa->sa_size,
 161                          0, &lesc->sc_reg)) {
 162                 aprint_error(": cannot map registers\n");
 163                 return;
 164         }
 165
 166         sc->sc_mem = lebuf->sc_buffer;
 167         sc->sc_memsize = lebuf->sc_bufsiz;
 168         sc->sc_addr = 0; /* Lance view is offset by buffer location */
 169         lebuf->attached = 1;
 170
 171         /* That old black magic... */
 172         sc->sc_conf3 = prom_getpropint(sa->sa_node, "busmaster-regval",
 173                                   LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON);
 174
 175         sc->sc_supmedia = lemedia;
 176         sc->sc_nsupmedia = NLEMEDIA;
 177         sc->sc_defaultmedia = lemedia[0];
 178
 179         prom_getether(sa->sa_node, sc->sc_enaddr);
 180
 181         sc->sc_copytodesc = lance_copytobuf_contig;
 182         sc->sc_copyfromdesc = lance_copyfrombuf_contig;
 183         sc->sc_copytobuf = lance_copytobuf_contig;
 184         sc->sc_copyfrombuf = lance_copyfrombuf_contig;
 185         sc->sc_zerobuf = lance_zerobuf_contig;
 186
 187         sc->sc_rdcsr = lerdcsr;
 188         sc->sc_wrcsr = lewrcsr;
 189
 190         am7990_config(&lesc->sc_am7990);
 191
 192         /* Establish interrupt handler */
 193         if (sa->sa_nintr != 0)
 194                 (void)bus_intr_establish(lesc->sc_bustag, sa->sa_pri,
 195                                          IPL_NET, am7990_intr, sc);
 196 }