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 #include <machine/bus.h>
  80 #ifdef __NetBSD__
  81 #include <machine/intr.h>
  82 #endif
  83
  84 #ifdef __NetBSD__
  85 #include <dev/ic/am79c930reg.h>
  86 #include <dev/ic/am79c930var.h>
  87 #endif
  88 #ifdef __FreeBSD__
  89 #include <dev/awi/am79c930reg.h>
  90 #include <dev/awi/am79c930var.h>
  91 #endif
  92
  93 #define AM930_DELAY(x) /*nothing*/
  94
  95 void am79c930_regdump(struct am79c930_softc *sc);
  96
  97 static void io_write_1(struct am79c930_softc *, u_int32_t, u_int8_t);
  98 static void io_write_2(struct am79c930_softc *, u_int32_t, u_int16_t);
  99 static void io_write_4(struct am79c930_softc *, u_int32_t, u_int32_t);
 100 static void io_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
 101
 102 static u_int8_t io_read_1(struct am79c930_softc *, u_int32_t);
 103 static u_int16_t io_read_2(struct am79c930_softc *, u_int32_t);
 104 static u_int32_t io_read_4(struct am79c930_softc *, u_int32_t);
 105 static void io_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
 106
 107 static void mem_write_1(struct am79c930_softc *, u_int32_t, u_int8_t);
 108 static void mem_write_2(struct am79c930_softc *, u_int32_t, u_int16_t);
 109 static void mem_write_4(struct am79c930_softc *, u_int32_t, u_int32_t);
 110 static void mem_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
 111
 112 static u_int8_t mem_read_1(struct am79c930_softc *, u_int32_t);
 113 static u_int16_t mem_read_2(struct am79c930_softc *, u_int32_t);
 114 static u_int32_t mem_read_4(struct am79c930_softc *, u_int32_t);
 115 static void mem_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
 116
 117 static struct am79c930_ops iospace_ops = {
 118         io_write_1,
 119         io_write_2,
 120         io_write_4,
 121         io_write_bytes,
 122         io_read_1,
 123         io_read_2,
 124         io_read_4,
 125         io_read_bytes
 126 };
 127
 128 struct am79c930_ops memspace_ops = {
 129         mem_write_1,
 130         mem_write_2,
 131         mem_write_4,
 132         mem_write_bytes,
 133         mem_read_1,
 134         mem_read_2,
 135         mem_read_4,
 136         mem_read_bytes
 137 };
 138
 139 static void
 140 io_write_1( struct am79c930_softc *sc, u_int32_t off, u_int8_t val)
 141 {
 142         AM930_DELAY(1);
 143         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 144             ((off>>8)& 0x7f));
 145         AM930_DELAY(1);
 146         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 147         AM930_DELAY(1);
 148         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA, val);
 149         AM930_DELAY(1);
 150 }
 151
 152 static void
 153 io_write_2(struct am79c930_softc *sc, u_int32_t off, u_int16_t val)
 154 {
 155         AM930_DELAY(1);
 156         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 157             ((off>>8)& 0x7f));
 158         AM930_DELAY(1);
 159         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
 160         AM930_DELAY(1);
 161         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, val & 0xff);
 162         AM930_DELAY(1);
 163         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, (val>>8)&0xff);
 164         AM930_DELAY(1);
 165 }
 166
 167 static void
 168 io_write_4(struct am79c930_softc *sc, u_int32_t off, u_int32_t val)
 169 {
 170         AM930_DELAY(1);
 171         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 172             ((off>>8)& 0x7f));
 173         AM930_DELAY(1);
 174         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
 175         AM930_DELAY(1);
 176         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,val & 0xff);
 177         AM930_DELAY(1);
 178         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>8)&0xff);
 179         AM930_DELAY(1);
 180         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>16)&0xff);
 181         AM930_DELAY(1);
 182         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>24)&0xff);
 183         AM930_DELAY(1);
 184 }
 185
 186 static void
 187 io_write_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 188     size_t len)
 189 {
 190         int i;
 191
 192         AM930_DELAY(1);
 193         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 194             ((off>>8)& 0x7f));
 195         AM930_DELAY(1);
 196         bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
 197         AM930_DELAY(1);
 198         for (i=0; i<len; i++)
 199                 bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,ptr[i]);
 200 }
 201
 202 static u_int8_t
 203 io_read_1(struct am79c930_softc *sc, u_int32_t off)
 204 {
 205         u_int8_t val;
 206
 207         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 208             ((off>>8)& 0x7f));
 209         AM930_DELAY(1);
 210         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 211         AM930_DELAY(1);
 212         val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
 213         AM930_DELAY(1);
 214         return val;
 215 }
 216
 217 static u_int16_t
 218 io_read_2(struct am79c930_softc *sc, u_int32_t off)
 219 {
 220         u_int16_t val;
 221
 222         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 223             ((off>>8)& 0x7f));
 224         AM930_DELAY(1);
 225         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 226         AM930_DELAY(1);
 227         val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
 228         AM930_DELAY(1);
 229         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8;
 230         AM930_DELAY(1);
 231         return val;
 232 }
 233
 234 static u_int32_t
 235 io_read_4(struct am79c930_softc *sc, u_int32_t off)
 236 {
 237         u_int32_t val;
 238
 239         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 240             ((off>>8)& 0x7f));
 241         AM930_DELAY(1);
 242         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 243         AM930_DELAY(1);
 244         val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
 245         AM930_DELAY(1);
 246         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8;
 247         AM930_DELAY(1);
 248         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 16;
 249         AM930_DELAY(1);
 250         val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 24;
 251         AM930_DELAY(1);
 252         return val;
 253 }
 254
 255 static void
 256 io_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 257     size_t len)
 258 {
 259         int i;
 260
 261         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
 262             ((off>>8)& 0x7f));
 263         AM930_DELAY(1);
 264         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
 265         AM930_DELAY(1);
 266         for (i=0; i<len; i++)
 267                 ptr[i] = bus_space_read_1(sc->sc_iot, sc->sc_ioh,
 268                     AM79C930_IODPA);
 269 }
 270
 271 static void
 272 mem_write_1(struct am79c930_softc *sc, u_int32_t off, u_int8_t val)
 273 {
 274         bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val);
 275 }
 276
 277 static
 278 void mem_write_2(struct am79c930_softc *sc, u_int32_t off, u_int16_t val)
 279 {
 280         bus_space_tag_t t = sc->sc_memt;
 281         bus_space_handle_t h = sc->sc_memh;
 282
 283         /* could be unaligned */
 284         if ((off & 0x1) == 0)
 285                 bus_space_write_2(t, h, off,    htole16(val));
 286         else {
 287                 bus_space_write_1(t, h, off,    val        & 0xff);
 288                 bus_space_write_1(t, h, off+1, (val >>  8) & 0xff);
 289         }
 290 }
 291
 292 static void
 293 mem_write_4(struct am79c930_softc *sc, u_int32_t off, 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,    htole32(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
 310 mem_write_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 311     size_t len)
 312 {
 313         bus_space_write_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
 314 }
 315
 316 static u_int8_t
 317 mem_read_1(struct am79c930_softc *sc, u_int32_t off)
 318 {
 319         return bus_space_read_1(sc->sc_memt, sc->sc_memh, off);
 320 }
 321
 322 static u_int16_t
 323 mem_read_2(struct am79c930_softc *sc, u_int32_t off)
 324 {
 325         /* could be unaligned */
 326         if ((off & 0x1) == 0)
 327                 return le16toh(bus_space_read_2(sc->sc_memt, sc->sc_memh, off));
 328         else
 329                 return
 330                      bus_space_read_1(sc->sc_memt, sc->sc_memh, off  )       |
 331                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8);
 332 }
 333
 334 static u_int32_t
 335 mem_read_4(struct am79c930_softc *sc, u_int32_t off)
 336 {
 337         /* could be unaligned */
 338         if ((off & 0x3) == 0)
 339                 return le32toh(bus_space_read_4(sc->sc_memt, sc->sc_memh, off));
 340         else
 341                 return
 342                      bus_space_read_1(sc->sc_memt, sc->sc_memh, off  )       |
 343                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8) |
 344                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+2) <<16) |
 345                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+3) <<24);
 346 }
 347
 348 static void
 349 mem_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
 350     size_t len)
 351 {
 352         bus_space_read_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
 353 }
 354
 355
 356 /*
 357  * Set bits in GCR.
 358  */
 359
 360 void
 361 am79c930_gcr_setbits(struct am79c930_softc *sc, u_int8_t bits)
 362 {
 363         u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 364
 365         gcr |= bits;
 366
 367         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
 368 }
 369
 370 /*
 371  * Clear bits in GCR.
 372  */
 373
 374 void
 375 am79c930_gcr_clearbits(struct am79c930_softc *sc, u_int8_t bits)
 376 {
 377         u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 378
 379         gcr &= ~bits;
 380
 381         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
 382 }
 383
 384 u_int8_t
 385 am79c930_gcr_read(struct am79c930_softc *sc)
 386 {
 387         return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
 388 }
 389
 390 #if 0
 391 void
 392 am79c930_regdump(struct am79c930_softc *sc)
 393 {
 394         u_int8_t buf[8];
 395         int i;
 396
 397         AM930_DELAY(5);
 398         for (i=0; i<8; i++) {
 399                 buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i);
 400                 AM930_DELAY(5);
 401         }
 402         printf("am79c930: regdump:");
 403         for (i=0; i<8; i++) {
 404                 printf(" %02x", buf[i]);
 405         }
 406         printf("\n");
 407 }
 408 #endif
 409
 410 void
 411 am79c930_chip_init(struct am79c930_softc *sc, int how)
 412 {
 413         /* zero the bank select register, and leave it that way.. */
 414         bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0);
 415         if (how)
 416                 sc->sc_ops = &memspace_ops;
 417         else
 418                 sc->sc_ops = &iospace_ops;
 419 }