if_le.c

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    1 /*      $NetBSD: if_le.c,v 1.30 2004/03/17 17:04:58 pk 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  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *      This product includes software developed by the NetBSD
   22  *      Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   39 
   40 #include <sys/cdefs.h>
   41 __KERNEL_RCSID(0, "$NetBSD: if_le.c,v 1.30 2004/03/17 17:04:58 pk Exp $");
   42 
   43 #include "opt_inet.h"
   44 #include "bpfilter.h"
   45 
   46 #include <sys/param.h>
   47 #include <sys/systm.h>
   48 #include <sys/mbuf.h>
   49 #include <sys/syslog.h>
   50 #include <sys/socket.h>
   51 #include <sys/device.h>
   52 #include <sys/malloc.h>
   53 
   54 #include <net/if.h>
   55 #include <net/if_ether.h>
   56 #include <net/if_media.h>
   57 
   58 #include <machine/bus.h>
   59 #include <machine/intr.h>
   60 #include <machine/autoconf.h>
   61 
   62 #include <dev/sbus/sbusvar.h>
   63 #include <dev/sbus/lebuffervar.h>       /*XXX*/
   64 
   65 #include <dev/ic/lancereg.h>
   66 #include <dev/ic/lancevar.h>
   67 #include <dev/ic/am7990reg.h>
   68 #include <dev/ic/am7990var.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         struct  sbusdev         sc_sd;          /* sbus device */
   79         bus_space_tag_t         sc_bustag;
   80         bus_dma_tag_t           sc_dmatag;
   81         bus_dmamap_t            sc_dmamap;
   82         bus_space_handle_t      sc_reg;
   83 };
   84 
   85 #define MEMSIZE 0x4000          /* LANCE memory size */
   86 
   87 int     lematch_sbus __P((struct device *, struct cfdata *, void *));
   88 void    leattach_sbus __P((struct device *, struct device *, void *));
   89 
   90 /*
   91  * Media types supported.
   92  */
   93 static int lemedia[] = {
   94         IFM_ETHER|IFM_10_5,
   95 };
   96 #define NLEMEDIA        (sizeof(lemedia) / sizeof(lemedia[0]))
   97 
   98 CFATTACH_DECL(le_sbus, sizeof(struct le_softc),
   99     lematch_sbus, leattach_sbus, NULL, NULL);
  100 
  101 extern struct cfdriver le_cd;
  102 
  103 #if defined(_KERNEL_OPT)
  104 #include "opt_ddb.h"
  105 #endif
  106 
  107 static void lewrcsr __P((struct lance_softc *, u_int16_t, u_int16_t));
  108 static u_int16_t lerdcsr __P((struct lance_softc *, u_int16_t));
  109 
  110 static void
  111 lewrcsr(sc, port, val)
  112         struct lance_softc *sc;
  113         u_int16_t port, val;
  114 {
  115         struct le_softc *lesc = (struct le_softc *)sc;
  116         bus_space_tag_t t = lesc->sc_bustag;
  117         bus_space_handle_t h = lesc->sc_reg;
  118 
  119         bus_space_write_2(t, h, LEREG1_RAP, port);
  120         bus_space_write_2(t, h, LEREG1_RDP, val);
  121 
  122 #if defined(SUN4M)
  123         /*
  124          * We need to flush the Sbus->Mbus write buffers. This can most
  125          * easily be accomplished by reading back the register that we
  126          * just wrote (thanks to Chris Torek for this solution).
  127          */
  128         (void)bus_space_read_2(t, h, LEREG1_RDP);
  129 #endif
  130 }
  131 
  132 static u_int16_t
  133 lerdcsr(sc, port)
  134         struct lance_softc *sc;
  135         u_int16_t port;
  136 {
  137         struct le_softc *lesc = (struct le_softc *)sc;
  138         bus_space_tag_t t = lesc->sc_bustag;
  139         bus_space_handle_t h = lesc->sc_reg;
  140 
  141         bus_space_write_2(t, h, LEREG1_RAP, port);
  142         return (bus_space_read_2(t, h, LEREG1_RDP));
  143 }
  144 
  145 
  146 int
  147 lematch_sbus(parent, cf, aux)
  148         struct device *parent;
  149         struct cfdata *cf;
  150         void *aux;
  151 {
  152         struct sbus_attach_args *sa = aux;
  153 
  154         return (strcmp(cf->cf_name, sa->sa_name) == 0);
  155 }
  156 
  157 void
  158 leattach_sbus(parent, self, aux)
  159         struct device *parent, *self;
  160         void *aux;
  161 {
  162         struct sbus_attach_args *sa = aux;
  163         struct le_softc *lesc = (struct le_softc *)self;
  164         struct lance_softc *sc = &lesc->sc_am7990.lsc;
  165         bus_dma_tag_t dmatag;
  166         struct sbusdev *sd;
  167 
  168         lesc->sc_bustag = sa->sa_bustag;
  169         lesc->sc_dmatag = dmatag = sa->sa_dmatag;
  170 
  171         if (sbus_bus_map(sa->sa_bustag,
  172                          sa->sa_slot,
  173                          sa->sa_offset,
  174                          sa->sa_size,
  175                          0, &lesc->sc_reg) != 0) {
  176                 printf("%s @ sbus: cannot map registers\n", self->dv_xname);
  177                 return;
  178         }
  179 
  180         /*
  181          * Look for an "unallocated" lebuffer and pair it with
  182          * this `le' device on the assumption that we're on
  183          * a pre-historic ROM that doesn't establish le<=>lebuffer
  184          * parent-child relationships.
  185          */
  186         for (sd = ((struct sbus_softc *)parent)->sc_sbdev; sd != NULL;
  187              sd = sd->sd_bchain) {
  188 
  189                 struct lebuf_softc *lebuf = (struct lebuf_softc *)sd->sd_dev;
  190 
  191                 if (strncmp("lebuffer", sd->sd_dev->dv_xname, 8) != 0)
  192                         continue;
  193 
  194                 if (lebuf->attached != 0)
  195                         continue;
  196 
  197                 sc->sc_mem = lebuf->sc_buffer;
  198                 sc->sc_memsize = lebuf->sc_bufsiz;
  199                 sc->sc_addr = 0; /* Lance view is offset by buffer location */
  200                 lebuf->attached = 1;
  201 
  202                 /* That old black magic... */
  203                 sc->sc_conf3 = prom_getpropint(sa->sa_node,
  204                                           "busmaster-regval",
  205                                           LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON);
  206                 break;
  207         }
  208 
  209         lesc->sc_sd.sd_reset = (void *)lance_reset;
  210         sbus_establish(&lesc->sc_sd, &sc->sc_dev);
  211 
  212         if (sc->sc_mem == 0) {
  213                 bus_dma_segment_t seg;
  214                 int rseg, error;
  215 
  216 #ifndef BUS_DMA_24BIT
  217 /* XXX - This flag is not defined on all archs */
  218 #define BUS_DMA_24BIT   0
  219 #endif
  220                 /* Get a DMA handle */
  221                 if ((error = bus_dmamap_create(dmatag, MEMSIZE, 1, MEMSIZE, 0,
  222                                                 BUS_DMA_NOWAIT|BUS_DMA_24BIT,
  223                                                 &lesc->sc_dmamap)) != 0) {
  224                         printf("%s: DMA map create error %d\n",
  225                                 self->dv_xname, error);
  226                         return;
  227                 }
  228 
  229                 /* Allocate DMA buffer */
  230                 if ((error = bus_dmamem_alloc(dmatag, MEMSIZE, 0, 0,
  231                                          &seg, 1, &rseg,
  232                                          BUS_DMA_NOWAIT|BUS_DMA_24BIT)) != 0){
  233                         printf("%s: DMA buffer allocation error %d\n",
  234                                 self->dv_xname, error);
  235                         return;
  236                 }
  237 
  238                 /* Map DMA buffer into kernel space */
  239                 if ((error = bus_dmamem_map(dmatag, &seg, rseg, MEMSIZE,
  240                                        (caddr_t *)&sc->sc_mem,
  241                                        BUS_DMA_NOWAIT|BUS_DMA_COHERENT)) != 0) {
  242                         printf("%s: DMA buffer map error %d\n",
  243                                 self->dv_xname, error);
  244                         bus_dmamem_free(lesc->sc_dmatag, &seg, rseg);
  245                         return;
  246                 }
  247 
  248                 /* Load DMA buffer */
  249                 if ((error = bus_dmamap_load(dmatag, lesc->sc_dmamap, sc->sc_mem,
  250                     MEMSIZE, NULL, BUS_DMA_NOWAIT)) != 0) {
  251                         printf("%s: DMA buffer map load error %d\n",
  252                                 self->dv_xname, error);
  253                         bus_dmamem_free(dmatag, &seg, rseg);
  254                         bus_dmamem_unmap(dmatag, sc->sc_mem, MEMSIZE);
  255                         return;
  256                 }
  257 
  258                 sc->sc_addr = lesc->sc_dmamap->dm_segs[0].ds_addr & 0xffffff;
  259                 sc->sc_memsize = MEMSIZE;
  260                 sc->sc_conf3 = LE_C3_BSWP | LE_C3_ACON | LE_C3_BCON;
  261         }
  262 
  263         prom_getether(sa->sa_node, sc->sc_enaddr);
  264 
  265         sc->sc_supmedia = lemedia;
  266         sc->sc_nsupmedia = NLEMEDIA;
  267         sc->sc_defaultmedia = lemedia[0];
  268 
  269         sc->sc_copytodesc = lance_copytobuf_contig;
  270         sc->sc_copyfromdesc = lance_copyfrombuf_contig;
  271         sc->sc_copytobuf = lance_copytobuf_contig;
  272         sc->sc_copyfrombuf = lance_copyfrombuf_contig;
  273         sc->sc_zerobuf = lance_zerobuf_contig;
  274 
  275         sc->sc_rdcsr = lerdcsr;
  276         sc->sc_wrcsr = lewrcsr;
  277 
  278         am7990_config(&lesc->sc_am7990);
  279 
  280         /* Establish interrupt handler */
  281         if (sa->sa_nintr != 0)
  282                 (void)bus_intr_establish(lesc->sc_bustag, sa->sa_pri,
  283                                          IPL_NET, am7990_intr, sc);
  284 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/sbus/if_le.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/sbus/if_le.c
