sys/dev/isa/if_lc_isa.c

   1 /*      $NetBSD: if_lc_isa.c,v 1.32 2009/05/12 08:44:19 cegger Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1994, 1995, 1997 Matt Thomas <matt@3am-software.com>
   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. The name of the author may not be used to endorse or promote products
  13  *    derived from this software without specific prior written permission
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 /*
  28  * DEC EtherWORKS 3 Ethernet Controllers
  29  *
  30  * Written by Matt Thomas
  31  *
  32  *   This driver supports the LEMAC (DE203, DE204, and DE205) cards.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 __KERNEL_RCSID(0, "$NetBSD: if_lc_isa.c,v 1.32 2009/05/12 08:44:19 cegger Exp $");
  37
  38 #include <sys/param.h>
  39 #include <sys/systm.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/socket.h>
  42 #include <sys/ioctl.h>
  43 #include <sys/errno.h>
  44 #include <sys/syslog.h>
  45 #include <sys/select.h>
  46 #include <sys/device.h>
  47 #include <sys/queue.h>
  48
  49 #include <net/if.h>
  50 #include <net/if_dl.h>
  51 #include <net/if_ether.h>
  52 #include <net/if_media.h>
  53
  54 #include <sys/cpu.h>
  55 #include <sys/bus.h>
  56 #include <sys/intr.h>
  57
  58 #include <dev/ic/lemacreg.h>
  59 #include <dev/ic/lemacvar.h>
  60
  61 #include <dev/isa/isavar.h>
  62
  63 extern struct cfdriver lc_cd;
  64
  65 static int lemac_isa_find(lemac_softc_t *, struct isa_attach_args *, int);
  66 static int lemac_isa_probe(device_t, cfdata_t, void *);
  67 static void lemac_isa_attach(device_t, device_t, void *);
  68
  69 CFATTACH_DECL(lc_isa, sizeof(lemac_softc_t),
  70     lemac_isa_probe, lemac_isa_attach, NULL, NULL);
  71
  72 static int
  73 lemac_isa_find(lemac_softc_t *sc, struct isa_attach_args *ia, int attach)
  74 {
  75         bus_addr_t maddr;
  76         bus_size_t msiz;
  77         int rv = 0, irq;
  78
  79         if (ia->ia_nio < 1)
  80                 return (0);
  81         if (ia->ia_niomem < 1)
  82                 return (0);
  83         if (ia->ia_nirq < 1)
  84                 return (0);
  85
  86         if (ISA_DIRECT_CONFIG(ia))
  87                 return (0);
  88
  89         /*
  90          * Disallow wildcarded i/o addresses.
  91          */
  92         if (ia->ia_io[0].ir_addr == ISA_UNKNOWN_PORT)
  93                 return 0;
  94
  95         /*
  96          * Make sure this is a valid LEMAC address.
  97          */
  98         if (ia->ia_io[0].ir_addr & (LEMAC_IOSIZE - 1))
  99                 return 0;
 100
 101         sc->sc_iot = ia->ia_iot;
 102
 103         if (bus_space_map(sc->sc_iot, ia->ia_io[0].ir_addr, LEMAC_IOSIZE, 0,
 104             &sc->sc_ioh)) {
 105                 if (attach)
 106                         printf(": can't map i/o space\n");
 107                 return 0;
 108         }
 109
 110         /*
 111          * Read the Ethernet address from the EEPROM.
 112          * It must start with one of the DEC OUIs and pass the
 113          * DEC ethernet checksum test.
 114          */
 115         if (lemac_port_check(sc->sc_iot, sc->sc_ioh) == 0)
 116                 goto outio;
 117
 118         /*
 119          * Get information about memory space and attempt to map it.
 120          */
 121         lemac_info_get(sc->sc_iot, sc->sc_ioh, &maddr, &msiz, &irq);
 122
 123         if (ia->ia_iomem[0].ir_addr != ISA_UNKNOWN_IOMEM &&
 124             ia->ia_iomem[0].ir_addr != maddr)
 125                 goto outio;
 126
 127         if (attach) {
 128                 if (msiz == 0) {
 129                         printf(": memory configuration is invalid\n");
 130                         goto outio;
 131                 }
 132
 133                 sc->sc_memt = ia->ia_memt;
 134                 if (bus_space_map(ia->ia_memt, maddr, msiz, 0, &sc->sc_memh)) {
 135                         printf(": can't map mem space\n");
 136                         goto outio;
 137                 }
 138         }
 139
 140         /*
 141          * Double-check IRQ configuration.
 142          */
 143         if (ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ &&
 144             ia->ia_irq[0].ir_irq != irq)
 145                 printf("%s: overriding IRQ %d to %d\n", device_xname(&sc->sc_dv),
 146                        ia->ia_irq[0].ir_irq, irq);
 147
 148         if (attach) {
 149                 sc->sc_ats = shutdownhook_establish(lemac_shutdown, sc);
 150                 if (sc->sc_ats == NULL) {
 151                         aprint_normal("\n");
 152                         aprint_error_dev(&sc->sc_dv, "warning: can't establish shutdown hook\n");
 153                 }
 154
 155                 lemac_ifattach(sc);
 156
 157                 sc->sc_ih = isa_intr_establish(ia->ia_ic, irq, IST_EDGE,
 158                     IPL_NET, lemac_intr, sc);
 159         }
 160
 161         /*
 162          * I guess we've found one.
 163          */
 164         rv = 1;
 165
 166         ia->ia_nio = 1;
 167         ia->ia_io[0].ir_size = LEMAC_IOSIZE;
 168
 169         ia->ia_niomem = 1;
 170         ia->ia_iomem[0].ir_addr = maddr;
 171         ia->ia_iomem[0].ir_size = msiz;
 172
 173         ia->ia_nirq = 1;
 174         ia->ia_irq[0].ir_irq = irq;
 175
 176         ia->ia_ndrq = 0;
 177
 178 outio:
 179         if (rv == 0 || !attach)
 180                 bus_space_unmap(sc->sc_iot, sc->sc_ioh, LEMAC_IOSIZE);
 181         return rv;
 182 }
 183
 184 static int
 185 lemac_isa_probe(device_t parent, cfdata_t match, void *aux)
 186 {
 187         struct isa_attach_args *ia = aux;
 188         cfdata_t cf = match;
 189         lemac_softc_t sc;
 190         snprintf(sc.sc_dv.dv_xname, sizeof(sc.sc_dv.dv_xname), "%s%d",
 191             lc_cd.cd_name, cf->cf_unit);
 192
 193         return lemac_isa_find(&sc, ia, 0);
 194 }
 195
 196 static void
 197 lemac_isa_attach(device_t parent, device_t self, void *aux)
 198 {
 199         lemac_softc_t *sc = (void *)self;
 200         struct isa_attach_args *ia = aux;
 201
 202         (void) lemac_isa_find(sc, ia, 1);
 203 }