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 1.8 2006/10/25 20:55:56 dillon 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 #include <sys/bus.h>
  68
  69 #include <machine/cpu.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
 121 io_write_1(struct am79c930_softc *sc, u_int32_t off, u_int8_t val)
 122 {
 123         AM930_DELAY(1);
 124         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 125             ((off>>8)& 0x7f));
 126         AM930_DELAY(1);
 127         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 128         AM930_DELAY(1);
 129         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA, val);
 130         AM930_DELAY(1);
 131 }
 132
 133 static void
 134 io_write_2(struct am79c930_softc *sc, u_int32_t off, u_int16_t val)
 135 {
 136         AM930_DELAY(1);
 137         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 138             ((off>>8)& 0x7f));
 139         AM930_DELAY(1);
 140         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
 141         AM930_DELAY(1);
 142         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, val & 0xff);
 143         AM930_DELAY(1);
 144         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, (val>>8)&0xff);
 145         AM930_DELAY(1);
 146 }
 147
 148 static void
 149 io_write_4(struct am79c930_softc *sc, u_int32_t off, u_int32_t val)
 150 {
 151         AM930_DELAY(1);
 152         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 153             ((off>>8)& 0x7f));
 154         AM930_DELAY(1);
 155         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
 156         AM930_DELAY(1);
 157         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,val & 0xff);
 158         AM930_DELAY(1);
 159         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>8)&0xff);
 160         AM930_DELAY(1);
 161         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>16)&0xff);
 162         AM930_DELAY(1);
 163         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>24)&0xff);
 164         AM930_DELAY(1);
 165 }
 166
 167 static void
 168 io_write_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 169                size_t len)
 170 {
 171         int i;
 172
 173         AM930_DELAY(1);
 174         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 175             ((off>>8)& 0x7f));
 176         AM930_DELAY(1);
 177         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
 178         AM930_DELAY(1);
 179         for (i=0; i<len; i++)
 180                 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,ptr[i]);
 181 }
 182
 183 static u_int8_t
 184 io_read_1(struct am79c930_softc *sc, u_int32_t off)
 185 {
 186         u_int8_t val;
 187
 188         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 189             ((off>>8)& 0x7f));
 190         AM930_DELAY(1);
 191         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 192         AM930_DELAY(1);
 193         val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
 194         AM930_DELAY(1);
 195         return val;
 196 }
 197
 198 static u_int16_t
 199 io_read_2(struct am79c930_softc *sc, u_int32_t off)
 200 {
 201         u_int16_t val;
 202
 203         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 204             ((off>>8)& 0x7f));
 205         AM930_DELAY(1);
 206         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 207         AM930_DELAY(1);
 208         val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
 209         AM930_DELAY(1);
 210         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8;
 211         AM930_DELAY(1);
 212         return val;
 213 }
 214
 215 static u_int32_t
 216 io_read_4(struct am79c930_softc *sc, u_int32_t off)
 217 {
 218         u_int32_t val;
 219
 220         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 221             ((off>>8)& 0x7f));
 222         AM930_DELAY(1);
 223         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 224         AM930_DELAY(1);
 225         val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
 226         AM930_DELAY(1);
 227         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8;
 228         AM930_DELAY(1);
 229         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 16;
 230         AM930_DELAY(1);
 231         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 24;
 232         AM930_DELAY(1);
 233         return val;
 234 }
 235
 236 static void
 237 io_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 238               size_t len)
 239 {
 240         int i;
 241
 242         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 243             ((off>>8)& 0x7f));
 244         AM930_DELAY(1);
 245         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 246         AM930_DELAY(1);
 247         for (i=0; i<len; i++)
 248                 ptr[i] = bus_space_read_1(sc->sc_iot, sc->sc_ioh,
 249                     AM79C930_IODPA);
 250 }
 251
 252 static void
 253 mem_write_1(struct am79c930_softc *sc, u_int32_t off, u_int8_t val)
 254 {
 255         bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val);
 256 }
 257
 258 static void
 259 mem_write_2(struct am79c930_softc *sc, u_int32_t off, u_int16_t val)
 260 {
 261         bus_space_tag_t t = sc->sc_memt;
 262         bus_space_handle_t h = sc->sc_memh;
 263
 264         /* could be unaligned */
 265         if ((off & 0x1) == 0)
 266                 bus_space_write_2(t, h, off,    val);
 267         else {
 268                 bus_space_write_1(t, h, off,    val        & 0xff);
 269                 bus_space_write_1(t, h, off+1, (val >>  8) & 0xff);
 270         }
 271 }
 272
 273 static void
 274 mem_write_4(struct am79c930_softc *sc, u_int32_t off, u_int32_t val)
 275 {
 276         bus_space_tag_t t = sc->sc_memt;
 277         bus_space_handle_t h = sc->sc_memh;
 278
 279         /* could be unaligned */
 280         if ((off & 0x3) == 0)
 281                 bus_space_write_4(t, h, off,    val);
 282         else {
 283                 bus_space_write_1(t, h, off,    val        & 0xff);
 284                 bus_space_write_1(t, h, off+1, (val >>  8) & 0xff);
 285                 bus_space_write_1(t, h, off+2, (val >> 16) & 0xff);
 286                 bus_space_write_1(t, h, off+3, (val >> 24) & 0xff);
 287         }
 288 }
 289
 290 static void
 291 mem_write_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 292                 size_t len)
 293 {
 294         bus_space_write_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
 295 }
 296
 297
 298 static u_int8_t
 299 mem_read_1(struct am79c930_softc *sc, u_int32_t off)
 300 {
 301         return bus_space_read_1(sc->sc_memt, sc->sc_memh, off);
 302 }
 303
 304 static u_int16_t
 305 mem_read_2(struct am79c930_softc *sc, u_int32_t off)
 306 {
 307         /* could be unaligned */
 308         if ((off & 0x1) == 0)
 309                 return bus_space_read_2(sc->sc_memt, sc->sc_memh, off);
 310         else
 311                 return
 312                      bus_space_read_1(sc->sc_memt, sc->sc_memh, off  )       |
 313                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8);
 314 }
 315
 316 static u_int32_t
 317 mem_read_4(struct am79c930_softc *sc, u_int32_t off)
 318 {
 319         /* could be unaligned */
 320         if ((off & 0x3) == 0)
 321                 return bus_space_read_4(sc->sc_memt, sc->sc_memh, off);
 322         else
 323                 return
 324                      bus_space_read_1(sc->sc_memt, sc->sc_memh, off  )       |
 325                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8) |
 326                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+2) <<16) |
 327                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+3) <<24);
 328 }
 329
 330 static void
 331 mem_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 332                size_t len)
 333 {
 334         bus_space_read_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
 335 }
 336
 337
 338
 339
 340 /*
 341  * Set bits in GCR.
 342  */
 343
 344 void
 345 am79c930_gcr_setbits(struct am79c930_softc *sc, u_int8_t bits)
 346 {
 347         u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 348
 349         gcr |= bits;
 350
 351         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
 352 }
 353
 354 /*
 355  * Clear bits in GCR.
 356  */
 357
 358 void
 359 am79c930_gcr_clearbits(struct am79c930_softc *sc, u_int8_t bits)
 360 {
 361         u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 362
 363         gcr &= ~bits;
 364
 365         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
 366 }
 367
 368 u_int8_t
 369 am79c930_gcr_read(struct am79c930_softc *sc)
 370 {
 371         return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 372 }
 373
 374 #if 0
 375 void
 376 am79c930_regdump(struct am79c930_softc *sc)
 377 {
 378         u_int8_t buf[8];
 379         int i;
 380
 381         AM930_DELAY(5);
 382         for (i=0; i<8; i++) {
 383                 buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i);
 384                 AM930_DELAY(5);
 385         }
 386         printf("am79c930: regdump:");
 387         for (i=0; i<8; i++) {
 388                 printf(" %02x", buf[i]);
 389         }
 390         printf("\n");
 391 }
 392 #endif
 393
 394 void
 395 am79c930_chip_init(struct am79c930_softc *sc, int how)
 396 {
 397         /* zero the bank select register, and leave it that way.. */
 398         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0);
 399         if (how)
 400                 sc->sc_ops = &memspace_ops;
 401         else
 402                 sc->sc_ops = &iospace_ops;
 403 }
 404
 405