sys/dev/ic/am79c930.c

   1 /* $NetBSD: am79c930.c,v 1.15 2007/10/19 11:59:47 ad Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1999 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Bill Sommerfeld
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Am79c930 chip driver.
  34  *
  35  * This is used by the awi driver to use the shared
  36  * memory attached to the 79c930 to communicate with the firmware running
  37  * in the 930's on-board 80188 core.
  38  *
  39  * The 79c930 can be mapped into just I/O space, or also have a
  40  * memory mapping; the mapping must be set up by the bus front-end
  41  * before am79c930_init is called.
  42  */
  43
  44 /*
  45  * operations:
  46  *
  47  * read_8, read_16, read_32, read_64, read_bytes
  48  * write_8, write_16, write_32, write_64, write_bytes
  49  * (two versions, depending on whether memory-space or i/o space is in use).
  50  *
  51  * interrupt E.C.
  52  * start isr
  53  * end isr
  54  */
  55
  56 #include <sys/cdefs.h>
  57 #ifdef __NetBSD__
  58 __KERNEL_RCSID(0, "$NetBSD: am79c930.c,v 1.15 2007/10/19 11:59:47 ad Exp $");
  59 #endif
  60 #ifdef __FreeBSD__
  61 __FBSDID("$FreeBSD$");
  62 #endif
  63
  64 #include <sys/param.h>
  65 #include <sys/systm.h>
  66 #include <sys/endian.h>
  67 #ifndef __FreeBSD__
  68 #include <sys/device.h>
  69 #endif
  70
  71 #include <sys/cpu.h>
  72 #ifdef __FreeBSD__
  73 #include <machine/bus_pio.h>
  74 #include <machine/bus_memio.h>
  75 #endif
  76 #include <sys/bus.h>
  77 #ifdef __NetBSD__
  78 #include <sys/intr.h>
  79 #endif
  80
  81 #ifdef __NetBSD__
  82 #include <dev/ic/am79c930reg.h>
  83 #include <dev/ic/am79c930var.h>
  84 #endif
  85 #ifdef __FreeBSD__
  86 #include <dev/awi/am79c930reg.h>
  87 #include <dev/awi/am79c930var.h>
  88 #endif
  89
  90 #define AM930_DELAY(x) /*nothing*/
  91
  92 #ifndef __BUS_SPACE_HAS_STREAM_METHODS
  93 #define bus_space_read_stream_2         bus_space_read_2
  94 #define bus_space_read_stream_4         bus_space_read_4
  95 #define bus_space_write_stream_2        bus_space_write_2
  96 #define bus_space_write_stream_4        bus_space_write_4
  97 #endif /* __BUS_SPACE_HAS_STREAM_METHODS */
  98
  99 void am79c930_regdump(struct am79c930_softc *sc);
 100
 101 static void io_write_1(struct am79c930_softc *, u_int32_t, u_int8_t);
 102 static void io_write_2(struct am79c930_softc *, u_int32_t, u_int16_t);
 103 static void io_write_4(struct am79c930_softc *, u_int32_t, u_int32_t);
 104 static void io_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
 105
 106 static u_int8_t io_read_1(struct am79c930_softc *, u_int32_t);
 107 static u_int16_t io_read_2(struct am79c930_softc *, u_int32_t);
 108 static u_int32_t io_read_4(struct am79c930_softc *, u_int32_t);
 109 static void io_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
 110
 111 static void mem_write_1(struct am79c930_softc *, u_int32_t, u_int8_t);
 112 static void mem_write_2(struct am79c930_softc *, u_int32_t, u_int16_t);
 113 static void mem_write_4(struct am79c930_softc *, u_int32_t, u_int32_t);
 114 static void mem_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
 115
 116 static u_int8_t mem_read_1(struct am79c930_softc *, u_int32_t);
 117 static u_int16_t mem_read_2(struct am79c930_softc *, u_int32_t);
 118 static u_int32_t mem_read_4(struct am79c930_softc *, u_int32_t);
 119 static void mem_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
 120
 121 static struct am79c930_ops iospace_ops = {
 122         io_write_1,
 123         io_write_2,
 124         io_write_4,
 125         io_write_bytes,
 126         io_read_1,
 127         io_read_2,
 128         io_read_4,
 129         io_read_bytes
 130 };
 131
 132 struct am79c930_ops memspace_ops = {
 133         mem_write_1,
 134         mem_write_2,
 135         mem_write_4,
 136         mem_write_bytes,
 137         mem_read_1,
 138         mem_read_2,
 139         mem_read_4,
 140         mem_read_bytes
 141 };
 142
 143 static void
 144 io_write_1( struct am79c930_softc *sc, u_int32_t off, u_int8_t val)
 145 {
 146         AM930_DELAY(1);
 147         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 148             ((off>>8)& 0x7f));
 149         AM930_DELAY(1);
 150         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 151         AM930_DELAY(1);
 152         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA, val);
 153         AM930_DELAY(1);
 154 }
 155
 156 static void
 157 io_write_2(struct am79c930_softc *sc, u_int32_t off, u_int16_t val)
 158 {
 159         AM930_DELAY(1);
 160         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 161             ((off>>8)& 0x7f));
 162         AM930_DELAY(1);
 163         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
 164         AM930_DELAY(1);
 165         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, val & 0xff);
 166         AM930_DELAY(1);
 167         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, (val>>8)&0xff);
 168         AM930_DELAY(1);
 169 }
 170
 171 static void
 172 io_write_4(struct am79c930_softc *sc, u_int32_t off, u_int32_t val)
 173 {
 174         AM930_DELAY(1);
 175         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 176             ((off>>8)& 0x7f));
 177         AM930_DELAY(1);
 178         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
 179         AM930_DELAY(1);
 180         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,val & 0xff);
 181         AM930_DELAY(1);
 182         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>8)&0xff);
 183         AM930_DELAY(1);
 184         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>16)&0xff);
 185         AM930_DELAY(1);
 186         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>24)&0xff);
 187         AM930_DELAY(1);
 188 }
 189
 190 static void
 191 io_write_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 192     size_t len)
 193 {
 194         int i;
 195
 196         AM930_DELAY(1);
 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         for (i=0; i<len; i++)
 203                 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,ptr[i]);
 204 }
 205
 206 static u_int8_t
 207 io_read_1(struct am79c930_softc *sc, u_int32_t off)
 208 {
 209         u_int8_t val;
 210
 211         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 212             ((off>>8)& 0x7f));
 213         AM930_DELAY(1);
 214         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 215         AM930_DELAY(1);
 216         val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
 217         AM930_DELAY(1);
 218         return val;
 219 }
 220
 221 static u_int16_t
 222 io_read_2(struct am79c930_softc *sc, u_int32_t off)
 223 {
 224         u_int16_t val;
 225
 226         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 227             ((off>>8)& 0x7f));
 228         AM930_DELAY(1);
 229         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 230         AM930_DELAY(1);
 231         val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
 232         AM930_DELAY(1);
 233         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8;
 234         AM930_DELAY(1);
 235         return val;
 236 }
 237
 238 static u_int32_t
 239 io_read_4(struct am79c930_softc *sc, u_int32_t off)
 240 {
 241         u_int32_t val;
 242
 243         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 244             ((off>>8)& 0x7f));
 245         AM930_DELAY(1);
 246         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 247         AM930_DELAY(1);
 248         val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
 249         AM930_DELAY(1);
 250         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8;
 251         AM930_DELAY(1);
 252         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 16;
 253         AM930_DELAY(1);
 254         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 24;
 255         AM930_DELAY(1);
 256         return val;
 257 }
 258
 259 static void
 260 io_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 261     size_t len)
 262 {
 263         int i;
 264
 265         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 266             ((off>>8)& 0x7f));
 267         AM930_DELAY(1);
 268         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 269         AM930_DELAY(1);
 270         for (i=0; i<len; i++)
 271                 ptr[i] = bus_space_read_1(sc->sc_iot, sc->sc_ioh,
 272                     AM79C930_IODPA);
 273 }
 274
 275 static void
 276 mem_write_1(struct am79c930_softc *sc, u_int32_t off, u_int8_t val)
 277 {
 278         bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val);
 279 }
 280
 281 static void
 282 mem_write_2(struct am79c930_softc *sc, u_int32_t off, u_int16_t val)
 283 {
 284         bus_space_tag_t t = sc->sc_memt;
 285         bus_space_handle_t h = sc->sc_memh;
 286
 287         /* could be unaligned */
 288         if ((off & 0x1) == 0)
 289                 bus_space_write_stream_2(t, h, off,    htole16(val));
 290         else {
 291                 bus_space_write_1(t, h, off,    val        & 0xff);
 292                 bus_space_write_1(t, h, off+1, (val >>  8) & 0xff);
 293         }
 294 }
 295
 296 static void
 297 mem_write_4(struct am79c930_softc *sc, u_int32_t off, u_int32_t val)
 298 {
 299         bus_space_tag_t t = sc->sc_memt;
 300         bus_space_handle_t h = sc->sc_memh;
 301
 302         /* could be unaligned */
 303         if ((off & 0x3) == 0)
 304                 bus_space_write_stream_4(t, h, off,    htole32(val));
 305         else {
 306                 bus_space_write_1(t, h, off,    val        & 0xff);
 307                 bus_space_write_1(t, h, off+1, (val >>  8) & 0xff);
 308                 bus_space_write_1(t, h, off+2, (val >> 16) & 0xff);
 309                 bus_space_write_1(t, h, off+3, (val >> 24) & 0xff);
 310         }
 311 }
 312
 313 static void
 314 mem_write_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 315     size_t len)
 316 {
 317         bus_space_write_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
 318 }
 319
 320 static u_int8_t
 321 mem_read_1(struct am79c930_softc *sc, 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
 327 mem_read_2(struct am79c930_softc *sc, u_int32_t off)
 328 {
 329         /* could be unaligned */
 330         if ((off & 0x1) == 0)
 331                 return le16toh(bus_space_read_stream_2(sc->sc_memt,
 332                     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
 340 mem_read_4(struct am79c930_softc *sc, u_int32_t off)
 341 {
 342         /* could be unaligned */
 343         if ((off & 0x3) == 0)
 344                 return le32toh(bus_space_read_stream_4(sc->sc_memt, sc->sc_memh,
 345                     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 static void
 355 mem_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 356     size_t len)
 357 {
 358         bus_space_read_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
 359 }
 360
 361
 362 /*
 363  * Set bits in GCR.
 364  */
 365
 366 void
 367 am79c930_gcr_setbits(struct am79c930_softc *sc, u_int8_t bits)
 368 {
 369         u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 370
 371         gcr |= bits;
 372
 373         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
 374 }
 375
 376 /*
 377  * Clear bits in GCR.
 378  */
 379
 380 void
 381 am79c930_gcr_clearbits(struct am79c930_softc *sc, u_int8_t bits)
 382 {
 383         u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 384
 385         gcr &= ~bits;
 386
 387         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
 388 }
 389
 390 u_int8_t
 391 am79c930_gcr_read(struct am79c930_softc *sc)
 392 {
 393         return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 394 }
 395
 396 #if 0
 397 void
 398 am79c930_regdump(struct am79c930_softc *sc)
 399 {
 400         u_int8_t buf[8];
 401         int i;
 402
 403         AM930_DELAY(5);
 404         for (i=0; i<8; i++) {
 405                 buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i);
 406                 AM930_DELAY(5);
 407         }
 408         printf("am79c930: regdump:");
 409         for (i=0; i<8; i++) {
 410                 printf(" %02x", buf[i]);
 411         }
 412         printf("\n");
 413 }
 414 #endif
 415
 416 void
 417 am79c930_chip_init(struct am79c930_softc *sc, int how)
 418 {
 419         /* zero the bank select register, and leave it that way.. */
 420         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0);
 421         if (how)
 422                 sc->sc_ops = &memspace_ops;
 423         else
 424                 sc->sc_ops = &iospace_ops;
 425 }