sys/dev/ic/depca.c

   1 /*      $NetBSD: depca.c,v 1.16 2008/04/04 12:25:07 tsutsui Exp $       */
   2
   3 /*-
   4  * Copyright (c) 1997, 1998, 2000 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 and by Jason R. Thorpe of the Numerical Aerospace
   9  * Simulation Facility, NASA Ames Research Center.
  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 /*-
  34  * Copyright (c) 1992, 1993
  35  *      The Regents of the University of California.  All rights reserved.
  36  *
  37  * This code is derived from software contributed to Berkeley by
  38  * Ralph Campbell and Rick Macklem.
  39  *
  40  * Redistribution and use in source and binary forms, with or without
  41  * modification, are permitted provided that the following conditions
  42  * are met:
  43  * 1. Redistributions of source code must retain the above copyright
  44  *    notice, this list of conditions and the following disclaimer.
  45  * 2. Redistributions in binary form must reproduce the above copyright
  46  *    notice, this list of conditions and the following disclaimer in the
  47  *    documentation and/or other materials provided with the distribution.
  48  * 3. Neither the name of the University nor the names of its contributors
  49  *    may be used to endorse or promote products derived from this software
  50  *    without specific prior written permission.
  51  *
  52  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  53  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  54  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  55  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  56  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  57  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  58  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  59  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  60  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  61  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  62  * SUCH DAMAGE.
  63  *
  64  *      @(#)if_le.c     8.2 (Berkeley) 11/16/93
  65  */
  66
  67 #include <sys/cdefs.h>
  68 __KERNEL_RCSID(0, "$NetBSD: depca.c,v 1.16 2008/04/04 12:25:07 tsutsui Exp $");
  69
  70 #include <sys/param.h>
  71 #include <sys/systm.h>
  72 #include <sys/mbuf.h>
  73 #include <sys/syslog.h>
  74 #include <sys/socket.h>
  75 #include <sys/device.h>
  76
  77 #include <net/if.h>
  78 #include <net/if_ether.h>
  79 #include <net/if_media.h>
  80
  81 #include <sys/cpu.h>
  82 #include <sys/intr.h>
  83 #include <sys/bus.h>
  84
  85 #include <dev/isa/isareg.h>
  86 #include <dev/isa/isavar.h>
  87
  88 #include <dev/ic/lancereg.h>
  89 #include <dev/ic/lancevar.h>
  90 #include <dev/ic/am7990reg.h>
  91 #include <dev/ic/am7990var.h>
  92 #include <dev/ic/depcareg.h>
  93 #include <dev/ic/depcavar.h>
  94
  95 struct le_depca_softc {
  96         struct am7990_softc sc_am7990;  /* glue to MI code */
  97
  98         void *sc_ih;
  99 };
 100
 101 int     le_depca_match(device_t, cfdata_t, void *);
 102 void    le_depca_attach(device_t, device_t, void *);
 103
 104 CFATTACH_DECL_NEW(le_depca, sizeof(struct le_depca_softc),
 105     le_depca_match, le_depca_attach, NULL, NULL);
 106
 107 void    depca_copytobuf(struct lance_softc *, void *, int, int);
 108 void    depca_copyfrombuf(struct lance_softc *, void *, int, int);
 109 void    depca_zerobuf(struct lance_softc *, int, int);
 110
 111 struct depca_attach_args {
 112         const char *da_name;
 113 };
 114
 115 int     depca_print(void *, const char *);
 116
 117 void
 118 depca_attach(struct depca_softc *sc)
 119 {
 120         struct depca_attach_args da;
 121
 122         da.da_name = "le";
 123
 124         (void)config_found(sc->sc_dev, &da, depca_print);
 125 }
 126
 127 int
 128 depca_print(void *aux, const char *pnp)
 129 {
 130         struct depca_attach_args *da = aux;
 131
 132         if (pnp)
 133                 aprint_normal("%s at %s", da->da_name, pnp);
 134
 135         return (UNCONF);
 136 }
 137
 138 void
 139 depca_wrcsr(struct lance_softc *sc, uint16_t port, uint16_t val)
 140 {
 141         struct depca_softc *dsc = device_private(device_parent(sc->sc_dev));
 142
 143         bus_space_write_2(dsc->sc_iot, dsc->sc_ioh, DEPCA_RAP, port);
 144         bus_space_write_2(dsc->sc_iot, dsc->sc_ioh, DEPCA_RDP, val);
 145 }
 146
 147 uint16_t
 148 depca_rdcsr(struct lance_softc *sc, uint16_t port)
 149 {
 150         struct depca_softc *dsc = device_private(device_parent(sc->sc_dev));
 151
 152         bus_space_write_2(dsc->sc_iot, dsc->sc_ioh, DEPCA_RAP, port);
 153         return (bus_space_read_2(dsc->sc_iot, dsc->sc_ioh, DEPCA_RDP));
 154 }
 155
 156 int
 157 depca_readprom(bus_space_tag_t iot, bus_space_handle_t ioh, uint8_t *laddr)
 158 {
 159         int port, i;
 160
 161         /*
 162          * Extract the physical MAC address from the ROM.
 163          *
 164          * The address PROM is 32 bytes wide, and we access it through
 165          * a single I/O port.  On each read, it rotates to the next
 166          * position.  We find the ethernet address by looking for a
 167          * particular sequence of bytes (0xff, 0x00, 0x55, 0xaa, 0xff,
 168          * 0x00, 0x55, 0xaa), and then reading the next 8 bytes (the
 169          * ethernet address and a checksum).
 170          *
 171          * It appears that the PROM can be at one of two locations, so
 172          * we just try both.
 173          */
 174         port = DEPCA_ADP;
 175         for (i = 0; i < 32; i++)
 176                 if (bus_space_read_1(iot, ioh, port) == 0xff &&
 177                     bus_space_read_1(iot, ioh, port) == 0x00 &&
 178                     bus_space_read_1(iot, ioh, port) == 0x55 &&
 179                     bus_space_read_1(iot, ioh, port) == 0xaa &&
 180                     bus_space_read_1(iot, ioh, port) == 0xff &&
 181                     bus_space_read_1(iot, ioh, port) == 0x00 &&
 182                     bus_space_read_1(iot, ioh, port) == 0x55 &&
 183                     bus_space_read_1(iot, ioh, port) == 0xaa)
 184                         goto found;
 185         port = DEPCA_ADP + 1;
 186         for (i = 0; i < 32; i++)
 187                 if (bus_space_read_1(iot, ioh, port) == 0xff &&
 188                     bus_space_read_1(iot, ioh, port) == 0x00 &&
 189                     bus_space_read_1(iot, ioh, port) == 0x55 &&
 190                     bus_space_read_1(iot, ioh, port) == 0xaa &&
 191                     bus_space_read_1(iot, ioh, port) == 0xff &&
 192                     bus_space_read_1(iot, ioh, port) == 0x00 &&
 193                     bus_space_read_1(iot, ioh, port) == 0x55 &&
 194                     bus_space_read_1(iot, ioh, port) == 0xaa)
 195                         goto found;
 196         aprint_error("depca: address not found\n");
 197         return (-1);
 198
 199 found:
 200
 201         if (laddr) {
 202                 for (i = 0; i < 6; i++)
 203                         laddr[i] = bus_space_read_1(iot, ioh, port);
 204         }
 205
 206 #if 0
 207         sum =
 208             (laddr[0] <<  2) +
 209             (laddr[1] << 10) +
 210             (laddr[2] <<  1) +
 211             (laddr[3] <<  9) +
 212             (laddr[4] <<  0) +
 213             (laddr[5] <<  8);
 214         sum = (sum & 0xffff) + (sum >> 16);
 215         sum = (sum & 0xffff) + (sum >> 16);
 216
 217         rom_sum = bus_space_read_1(iot, ioh, port);
 218         rom_sum |= bus_space_read_1(iot, ioh, port) << 8;
 219
 220         if (sum != rom_sum) {
 221                 aprint_error("depca: checksum mismatch; "
 222                     "calculated %04x != read %04x", sum, rom_sum);
 223                 return (-1);
 224         }
 225 #endif
 226
 227         return (0);
 228 }
 229
 230 int
 231 le_depca_match(device_t parent, cfdata_t cf, void *aux)
 232 {
 233         struct depca_attach_args *da = aux;
 234
 235         return (strcmp(da->da_name, cf->cf_name) == 0);
 236 }
 237
 238 void
 239 le_depca_attach(device_t parent, device_t self, void *aux)
 240 {
 241         struct depca_softc *dsc = device_private(parent);
 242         struct le_depca_softc *lesc = device_private(self);
 243         struct lance_softc *sc = &lesc->sc_am7990.lsc;
 244         uint8_t val;
 245         int i;
 246
 247         sc->sc_dev = self;
 248         aprint_error("\n");
 249
 250         /* I/O and memory spaces already mapped. */
 251
 252         if (depca_readprom(dsc->sc_iot, dsc->sc_ioh, sc->sc_enaddr)) {
 253                 aprint_error_dev(self, "can't read PROM\n");
 254                 return;
 255         }
 256
 257         bus_space_write_2(dsc->sc_iot, dsc->sc_ioh, DEPCA_CSR,
 258             DEPCA_CSR_DUM | DEPCA_CSR_IEN | DEPCA_CSR_SHE |
 259             (dsc->sc_memsize == 32*1024 ? DEPCA_CSR_LOW32K : 0));
 260
 261         val = 0xff;
 262         for (;;) {
 263                 uint8_t cv;
 264
 265                 bus_space_set_region_1(dsc->sc_memt, dsc->sc_memh, 0, val,
 266                     dsc->sc_memsize);
 267                 for (i = 0; i < dsc->sc_memsize; i++) {
 268                         cv = bus_space_read_1(dsc->sc_memt, dsc->sc_memh, i);
 269                         if (cv != val) {
 270                                 aprint_error_dev(self,
 271                                     "failed to clear memory at %d "
 272                                     "(0x%02x != 0x%02x)\n",
 273                                     i, cv, val);
 274                                 return;
 275                         }
 276                 }
 277                 if (val == 0x00)
 278                         break;
 279                 val -= 0x55;
 280         }
 281
 282         sc->sc_conf3 = LE_C3_ACON;
 283         sc->sc_mem = 0;                 /* Not used. */
 284         sc->sc_addr = 0;
 285         sc->sc_memsize = dsc->sc_memsize;
 286
 287         sc->sc_copytodesc = depca_copytobuf;
 288         sc->sc_copyfromdesc = depca_copyfrombuf;
 289         sc->sc_copytobuf = depca_copytobuf;
 290         sc->sc_copyfrombuf = depca_copyfrombuf;
 291         sc->sc_zerobuf = depca_zerobuf;
 292
 293         sc->sc_rdcsr = depca_rdcsr;
 294         sc->sc_wrcsr = depca_wrcsr;
 295         sc->sc_hwinit = NULL;
 296
 297         aprint_error("%s", device_xname(self));
 298         am7990_config(&lesc->sc_am7990);
 299
 300         lesc->sc_ih = (*dsc->sc_intr_establish)(dsc, sc);
 301 }
 302
 303 /*
 304  * Controller interrupt.
 305  */
 306 int
 307 depca_intredge(void *arg)
 308 {
 309
 310         if (am7990_intr(arg) == 0)
 311                 return (0);
 312         for (;;)
 313                 if (am7990_intr(arg) == 0)
 314                         return (1);
 315 }
 316
 317 /*
 318  * DEPCA shared memory access functions.
 319  */
 320
 321 void
 322 depca_copytobuf(struct lance_softc *sc, void *from, int boff, int len)
 323 {
 324         struct depca_softc *dsc = device_private(device_parent(sc->sc_dev));
 325
 326         bus_space_write_region_1(dsc->sc_memt, dsc->sc_memh, boff,
 327             from, len);
 328 }
 329
 330 void
 331 depca_copyfrombuf(struct lance_softc *sc, void *to, int boff, int len)
 332 {
 333         struct depca_softc *dsc = device_private(device_parent(sc->sc_dev));
 334
 335         bus_space_read_region_1(dsc->sc_memt, dsc->sc_memh, boff,
 336             to, len);
 337 }
 338
 339 void
 340 depca_zerobuf(struct lance_softc *sc, int boff, int len)
 341 {
 342         struct depca_softc *dsc = device_private(device_parent(sc->sc_dev));
 343
 344         bus_space_set_region_1(dsc->sc_memt, dsc->sc_memh, boff,
 345             0x00, len);
 346 }