sys/dev/awi/am79c930.c

   1 /* $NetBSD: am79c930.c,v 1.9 2004/01/15 09:33:48 onoe 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  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *        This product includes software developed by the NetBSD
  21  *        Foundation, Inc. and its contributors.
  22  * 4. Neither the name of The NetBSD Foundation nor the names of its
  23  *    contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  36  * POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 /*
  40  * Am79c930 chip driver.
  41  *
  42  * This is used by the awi driver to use the shared
  43  * memory attached to the 79c930 to communicate with the firmware running
  44  * in the 930's on-board 80188 core.
  45  *
  46  * The 79c930 can be mapped into just I/O space, or also have a
  47  * memory mapping; the mapping must be set up by the bus front-end
  48  * before am79c930_init is called.
  49  */
  50
  51 /*
  52  * operations:
  53  *
  54  * read_8, read_16, read_32, read_64, read_bytes
  55  * write_8, write_16, write_32, write_64, write_bytes
  56  * (two versions, depending on whether memory-space or i/o space is in use).
  57  *
  58  * interrupt E.C.
  59  * start isr
  60  * end isr
  61  */
  62
  63 #include <sys/cdefs.h>
  64 #ifdef __NetBSD__
  65 __KERNEL_RCSID(0, "$NetBSD: am79c930.c,v 1.9 2004/01/15 09:33:48 onoe Exp $");
  66 #endif
  67 #ifdef __FreeBSD__
  68 __FBSDID("$FreeBSD$");
  69 #endif
  70
  71 #include <sys/param.h>
  72 #include <sys/systm.h>
  73 #include <sys/endian.h>
  74 #ifndef __FreeBSD__
  75 #include <sys/device.h>
  76 #endif
  77
  78 #include <machine/cpu.h>
  79 #ifdef __FreeBSD__
  80 #include <machine/bus_pio.h>
  81 #include <machine/bus_memio.h>
  82 #endif
  83 #include <machine/bus.h>
  84 #ifdef __NetBSD__
  85 #include <machine/intr.h>
  86 #endif
  87
  88 #ifdef __NetBSD__
  89 #include <dev/ic/am79c930reg.h>
  90 #include <dev/ic/am79c930var.h>
  91 #endif
  92 #ifdef __FreeBSD__
  93 #include <dev/awi/am79c930reg.h>
  94 #include <dev/awi/am79c930var.h>
  95 #endif
  96
  97 #define AM930_DELAY(x) /*nothing*/
  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
 282 void 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_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_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_2(sc->sc_memt, sc->sc_memh, off));
 332         else
 333                 return
 334                      bus_space_read_1(sc->sc_memt, sc->sc_memh, off  )       |
 335                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8);
 336 }
 337
 338 static u_int32_t
 339 mem_read_4(struct am79c930_softc *sc, u_int32_t off)
 340 {
 341         /* could be unaligned */
 342         if ((off & 0x3) == 0)
 343                 return le32toh(bus_space_read_4(sc->sc_memt, sc->sc_memh, off));
 344         else
 345                 return
 346                      bus_space_read_1(sc->sc_memt, sc->sc_memh, off  )       |
 347                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8) |
 348                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+2) <<16) |
 349                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+3) <<24);
 350 }
 351
 352 static void
 353 mem_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 354     size_t len)
 355 {
 356         bus_space_read_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
 357 }
 358
 359
 360 /*
 361  * Set bits in GCR.
 362  */
 363
 364 void
 365 am79c930_gcr_setbits(struct am79c930_softc *sc, u_int8_t bits)
 366 {
 367         u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 368
 369         gcr |= bits;
 370
 371         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
 372 }
 373
 374 /*
 375  * Clear bits in GCR.
 376  */
 377
 378 void
 379 am79c930_gcr_clearbits(struct am79c930_softc *sc, u_int8_t bits)
 380 {
 381         u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 382
 383         gcr &= ~bits;
 384
 385         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
 386 }
 387
 388 u_int8_t
 389 am79c930_gcr_read(struct am79c930_softc *sc)
 390 {
 391         return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 392 }
 393
 394 #if 0
 395 void
 396 am79c930_regdump(struct am79c930_softc *sc)
 397 {
 398         u_int8_t buf[8];
 399         int i;
 400
 401         AM930_DELAY(5);
 402         for (i=0; i<8; i++) {
 403                 buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i);
 404                 AM930_DELAY(5);
 405         }
 406         printf("am79c930: regdump:");
 407         for (i=0; i<8; i++) {
 408                 printf(" %02x", buf[i]);
 409         }
 410         printf("\n");
 411 }
 412 #endif
 413
 414 void
 415 am79c930_chip_init(struct am79c930_softc *sc, int how)
 416 {
 417         /* zero the bank select register, and leave it that way.. */
 418         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0);
 419         if (how)
 420                 sc->sc_ops = &memspace_ops;
 421         else
 422                 sc->sc_ops = &iospace_ops;
 423 }