sys/dev/netif/awi/am79c930.c

   1 /* $NetBSD: am79c930.c,v 1.5 2000/03/23 13:57:58 onoe Exp $ */
   2 /* $FreeBSD: src/sys/dev/awi/am79c930.c,v 1.2.2.1 2000/12/07 04:09:39 imp Exp $ */
   3 /* $DragonFly: src/sys/dev/netif/awi/Attic/am79c930.c,v 1.6 2005/06/13 20:25:56 joerg Exp $ */
   4
   5 /*-
   6  * Copyright (c) 1999 The NetBSD Foundation, Inc.
   7  * All rights reserved.
   8  *
   9  * This code is derived from software contributed to The NetBSD Foundation
  10  * by Bill Sommerfeld
  11  *
  12  * Redistribution and use in source and binary forms, with or without
  13  * modification, are permitted provided that the following conditions
  14  * are met:
  15  * 1. Redistributions of source code must retain the above copyright
  16  *    notice, this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright
  18  *    notice, this list of conditions and the following disclaimer in the
  19  *    documentation and/or other materials provided with the distribution.
  20  * 3. All advertising materials mentioning features or use of this software
  21  *    must display the following acknowledgement:
  22  *        This product includes software developed by the NetBSD
  23  *        Foundation, Inc. and its contributors.
  24  * 4. Neither the name of The NetBSD Foundation nor the names of its
  25  *    contributors may be used to endorse or promote products derived
  26  *    from this software without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  29  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  30  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  31  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  32  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  33  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  34  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  35  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  36  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  37  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  38  * POSSIBILITY OF SUCH DAMAGE.
  39  */
  40
  41 /*
  42  * Am79c930 chip driver.
  43  *
  44  * This is used by the awi driver to use the shared
  45  * memory attached to the 79c930 to communicate with the firmware running
  46  * in the 930's on-board 80188 core.
  47  *
  48  * The 79c930 can be mapped into just I/O space, or also have a
  49  * memory mapping; the mapping must be set up by the bus front-end
  50  * before am79c930_init is called.
  51  */
  52
  53 /*
  54  * operations:
  55  *
  56  * read_8, read_16, read_32, read_64, read_bytes
  57  * write_8, write_16, write_32, write_64, write_bytes
  58  * (two versions, depending on whether memory-space or i/o space is in use).
  59  *
  60  * interrupt E.C.
  61  * start isr
  62  * end isr
  63  */
  64
  65 #include <sys/param.h>
  66 #include <sys/systm.h>
  67
  68 #include <machine/cpu.h>
  69 #include <machine/bus.h>
  70
  71 #include <dev/netif/awi/am79c930reg.h>
  72 #include <dev/netif/awi/am79c930var.h>
  73
  74 #define AM930_DELAY(x) /*nothing*/
  75
  76 void am79c930_regdump (struct am79c930_softc *sc);
  77
  78 static void io_write_1 (struct am79c930_softc *, u_int32_t, u_int8_t);
  79 static void io_write_2 (struct am79c930_softc *, u_int32_t, u_int16_t);
  80 static void io_write_4 (struct am79c930_softc *, u_int32_t, u_int32_t);
  81 static void io_write_bytes (struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
  82
  83 static u_int8_t io_read_1 (struct am79c930_softc *, u_int32_t);
  84 static u_int16_t io_read_2 (struct am79c930_softc *, u_int32_t);
  85 static u_int32_t io_read_4 (struct am79c930_softc *, u_int32_t);
  86 static void io_read_bytes (struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
  87
  88 static void mem_write_1 (struct am79c930_softc *, u_int32_t, u_int8_t);
  89 static void mem_write_2 (struct am79c930_softc *, u_int32_t, u_int16_t);
  90 static void mem_write_4 (struct am79c930_softc *, u_int32_t, u_int32_t);
  91 static void mem_write_bytes (struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
  92
  93 static u_int8_t mem_read_1 (struct am79c930_softc *, u_int32_t);
  94 static u_int16_t mem_read_2 (struct am79c930_softc *, u_int32_t);
  95 static u_int32_t mem_read_4 (struct am79c930_softc *, u_int32_t);
  96 static void mem_read_bytes (struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
  97
  98 static struct am79c930_ops iospace_ops = {
  99         io_write_1,
 100         io_write_2,
 101         io_write_4,
 102         io_write_bytes,
 103         io_read_1,
 104         io_read_2,
 105         io_read_4,
 106         io_read_bytes
 107 };
 108
 109 struct am79c930_ops memspace_ops = {
 110         mem_write_1,
 111         mem_write_2,
 112         mem_write_4,
 113         mem_write_bytes,
 114         mem_read_1,
 115         mem_read_2,
 116         mem_read_4,
 117         mem_read_bytes
 118 };
 119
 120 static void io_write_1 (sc, off, val)
 121         struct am79c930_softc *sc;
 122         u_int32_t off;
 123         u_int8_t val;
 124 {
 125         AM930_DELAY(1);
 126         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 127             ((off>>8)& 0x7f));
 128         AM930_DELAY(1);
 129         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 130         AM930_DELAY(1);
 131         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA, val);
 132         AM930_DELAY(1);
 133 }
 134
 135 static void io_write_2 (sc, off, val)
 136         struct am79c930_softc *sc;
 137         u_int32_t off;
 138         u_int16_t val;
 139 {
 140         AM930_DELAY(1);
 141         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 142             ((off>>8)& 0x7f));
 143         AM930_DELAY(1);
 144         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
 145         AM930_DELAY(1);
 146         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, val & 0xff);
 147         AM930_DELAY(1);
 148         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, (val>>8)&0xff);
 149         AM930_DELAY(1);
 150 }
 151
 152 static void io_write_4 (sc, off, val)
 153         struct am79c930_softc *sc;
 154         u_int32_t off;
 155         u_int32_t val;
 156 {
 157         AM930_DELAY(1);
 158         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 159             ((off>>8)& 0x7f));
 160         AM930_DELAY(1);
 161         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
 162         AM930_DELAY(1);
 163         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,val & 0xff);
 164         AM930_DELAY(1);
 165         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>8)&0xff);
 166         AM930_DELAY(1);
 167         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>16)&0xff);
 168         AM930_DELAY(1);
 169         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>24)&0xff);
 170         AM930_DELAY(1);
 171 }
 172
 173 static void io_write_bytes (sc, off, ptr, len)
 174         struct am79c930_softc *sc;
 175         u_int32_t off;
 176         u_int8_t *ptr;
 177         size_t len;
 178 {
 179         int i;
 180
 181         AM930_DELAY(1);
 182         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 183             ((off>>8)& 0x7f));
 184         AM930_DELAY(1);
 185         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
 186         AM930_DELAY(1);
 187         for (i=0; i<len; i++)
 188                 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,ptr[i]);
 189 }
 190
 191 static u_int8_t io_read_1 (sc, off)
 192         struct am79c930_softc *sc;
 193         u_int32_t off;
 194 {
 195         u_int8_t val;
 196
 197         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 198             ((off>>8)& 0x7f));
 199         AM930_DELAY(1);
 200         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 201         AM930_DELAY(1);
 202         val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
 203         AM930_DELAY(1);
 204         return val;
 205 }
 206
 207 static u_int16_t io_read_2 (sc, off)
 208         struct am79c930_softc *sc;
 209         u_int32_t off;
 210 {
 211         u_int16_t val;
 212
 213         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 214             ((off>>8)& 0x7f));
 215         AM930_DELAY(1);
 216         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 217         AM930_DELAY(1);
 218         val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
 219         AM930_DELAY(1);
 220         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8;
 221         AM930_DELAY(1);
 222         return val;
 223 }
 224
 225 static u_int32_t io_read_4 (sc, off)
 226         struct am79c930_softc *sc;
 227         u_int32_t off;
 228 {
 229         u_int32_t val;
 230
 231         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 232             ((off>>8)& 0x7f));
 233         AM930_DELAY(1);
 234         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 235         AM930_DELAY(1);
 236         val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
 237         AM930_DELAY(1);
 238         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8;
 239         AM930_DELAY(1);
 240         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 16;
 241         AM930_DELAY(1);
 242         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 24;
 243         AM930_DELAY(1);
 244         return val;
 245 }
 246
 247 static void io_read_bytes (sc, off, ptr, len)
 248         struct am79c930_softc *sc;
 249         u_int32_t off;
 250         u_int8_t *ptr;
 251         size_t len;
 252 {
 253         int i;
 254
 255         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 256             ((off>>8)& 0x7f));
 257         AM930_DELAY(1);
 258         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 259         AM930_DELAY(1);
 260         for (i=0; i<len; i++)
 261                 ptr[i] = bus_space_read_1(sc->sc_iot, sc->sc_ioh,
 262                     AM79C930_IODPA);
 263 }
 264
 265 static void mem_write_1 (sc, off, val)
 266         struct am79c930_softc *sc;
 267         u_int32_t off;
 268         u_int8_t val;
 269 {
 270         bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val);
 271 }
 272
 273 static void mem_write_2 (sc, off, val)
 274         struct am79c930_softc *sc;
 275         u_int32_t off;
 276         u_int16_t val;
 277 {
 278         bus_space_tag_t t = sc->sc_memt;
 279         bus_space_handle_t h = sc->sc_memh;
 280
 281         /* could be unaligned */
 282         if ((off & 0x1) == 0)
 283                 bus_space_write_2(t, h, off,    val);
 284         else {
 285                 bus_space_write_1(t, h, off,    val        & 0xff);
 286                 bus_space_write_1(t, h, off+1, (val >>  8) & 0xff);
 287         }
 288 }
 289
 290 static void mem_write_4 (sc, off, val)
 291         struct am79c930_softc *sc;
 292         u_int32_t off;
 293         u_int32_t val;
 294 {
 295         bus_space_tag_t t = sc->sc_memt;
 296         bus_space_handle_t h = sc->sc_memh;
 297
 298         /* could be unaligned */
 299         if ((off & 0x3) == 0)
 300                 bus_space_write_4(t, h, off,    val);
 301         else {
 302                 bus_space_write_1(t, h, off,    val        & 0xff);
 303                 bus_space_write_1(t, h, off+1, (val >>  8) & 0xff);
 304                 bus_space_write_1(t, h, off+2, (val >> 16) & 0xff);
 305                 bus_space_write_1(t, h, off+3, (val >> 24) & 0xff);
 306         }
 307 }
 308
 309 static void mem_write_bytes (sc, off, ptr, len)
 310         struct am79c930_softc *sc;
 311         u_int32_t off;
 312         u_int8_t *ptr;
 313         size_t len;
 314 {
 315         bus_space_write_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
 316 }
 317
 318
 319 static u_int8_t mem_read_1 (sc, off)
 320         struct am79c930_softc *sc;
 321         u_int32_t off;
 322 {
 323         return bus_space_read_1(sc->sc_memt, sc->sc_memh, off);
 324 }
 325
 326 static u_int16_t mem_read_2 (sc, off)
 327         struct am79c930_softc *sc;
 328         u_int32_t off;
 329 {
 330         /* could be unaligned */
 331         if ((off & 0x1) == 0)
 332                 return bus_space_read_2(sc->sc_memt, sc->sc_memh, off);
 333         else
 334                 return
 335                      bus_space_read_1(sc->sc_memt, sc->sc_memh, off  )       |
 336                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8);
 337 }
 338
 339 static u_int32_t mem_read_4 (sc, off)
 340         struct am79c930_softc *sc;
 341         u_int32_t off;
 342 {
 343         /* could be unaligned */
 344         if ((off & 0x3) == 0)
 345                 return bus_space_read_4(sc->sc_memt, sc->sc_memh, off);
 346         else
 347                 return
 348                      bus_space_read_1(sc->sc_memt, sc->sc_memh, off  )       |
 349                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8) |
 350                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+2) <<16) |
 351                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+3) <<24);
 352 }
 353
 354
 355
 356 static void mem_read_bytes (sc, off, ptr, len)
 357         struct am79c930_softc *sc;
 358         u_int32_t off;
 359         u_int8_t *ptr;
 360         size_t len;
 361 {
 362         bus_space_read_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
 363 }
 364
 365
 366
 367
 368 /*
 369  * Set bits in GCR.
 370  */
 371
 372 void am79c930_gcr_setbits (sc, bits)
 373         struct am79c930_softc *sc;
 374         u_int8_t bits;
 375 {
 376         u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 377
 378         gcr |= bits;
 379
 380         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
 381 }
 382
 383 /*
 384  * Clear bits in GCR.
 385  */
 386
 387 void am79c930_gcr_clearbits (sc, bits)
 388         struct am79c930_softc *sc;
 389         u_int8_t bits;
 390 {
 391         u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 392
 393         gcr &= ~bits;
 394
 395         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
 396 }
 397
 398 u_int8_t am79c930_gcr_read (sc)
 399         struct am79c930_softc *sc;
 400 {
 401         return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 402 }
 403
 404 #if 0
 405 void am79c930_regdump (sc)
 406         struct am79c930_softc *sc;
 407 {
 408         u_int8_t buf[8];
 409         int i;
 410
 411         AM930_DELAY(5);
 412         for (i=0; i<8; i++) {
 413                 buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i);
 414                 AM930_DELAY(5);
 415         }
 416         printf("am79c930: regdump:");
 417         for (i=0; i<8; i++) {
 418                 printf(" %02x", buf[i]);
 419         }
 420         printf("\n");
 421 }
 422 #endif
 423
 424 void am79c930_chip_init (sc, how)
 425         struct am79c930_softc *sc;
 426 {
 427         /* zero the bank select register, and leave it that way.. */
 428         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0);
 429         if (how)
 430                 sc->sc_ops = &memspace_ops;
 431         else
 432                 sc->sc_ops = &iospace_ops;
 433 }
 434
 435