root/dev/ic/am79c930.c

DEFINITIONS

1. io_write_1
2. io_write_2
3. io_write_4
4. io_write_bytes
5. io_read_1
6. io_read_2
7. io_read_4
8. io_read_bytes
9. mem_write_1
10. mem_write_2
11. mem_write_4
12. mem_write_bytes
13. mem_read_1
14. mem_read_2
15. mem_read_4
16. mem_read_bytes
17. am79c930_gcr_setbits
18. am79c930_gcr_clearbits
19. am79c930_gcr_read
20. am79c930_regdump
21. am79c930_chip_init

    1 /* $OpenBSD: am79c930.c,v 1.4 2002/03/14 01:26:54 millert Exp $ */
    2 /* $NetBSD: am79c930.c,v 1.5 2000/03/23 13:57:58 onoe Exp $ */
    4 /*-
    5  * Copyright (c) 1999 The NetBSD Foundation, Inc.
    6  * All rights reserved.
    7  *
    8  * This code is derived from software contributed to The NetBSD Foundation
    9  * by Bill Sommerfeld
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *        This product includes software developed by the NetBSD
   22  *        Foundation, Inc. and its contributors.
   23  * 4. Neither the name of The NetBSD Foundation nor the names of its
   24  *    contributors may be used to endorse or promote products derived
   25  *    from this software without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   28  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   29  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   30  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   31  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   32  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   33  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   34  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   35  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   36  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   37  * POSSIBILITY OF SUCH DAMAGE.
   38  */
   40 /*
   41  * Am79c930 chip driver.
   42  *
   43  * This is used by the awi driver to use the shared
   44  * memory attached to the 79c930 to communicate with the firmware running
   45  * in the 930's on-board 80188 core.
   46  *
   47  * The 79c930 can be mapped into just I/O space, or also have a
   48  * memory mapping; the mapping must be set up by the bus front-end
   49  * before am79c930_init is called.
   50  */
   52 /*
   53  * operations:
   54  *
   55  * read_8, read_16, read_32, read_64, read_bytes
   56  * write_8, write_16, write_32, write_64, write_bytes
   57  * (two versions, depending on whether memory-space or i/o space is in use).
   58  *
   59  * interrupt E.C.
   60  * start isr
   61  * end isr
   62  */
   64 #include <sys/param.h>
   65 #include <sys/systm.h>
   66 #ifndef __FreeBSD__
   67 #include <sys/device.h>
   68 #endif
   70 #include <machine/cpu.h>
   71 #ifdef __FreeBSD__
   72 #include <machine/bus_pio.h>
   73 #include <machine/bus_memio.h>
   74 #endif
   75 #include <machine/bus.h>
   76 #ifdef __NetBSD__
   77 #include <machine/intr.h>
   78 #endif
   80 #if defined(__NetBSD__) || defined(__OpenBSD__)
   81 #include <dev/ic/am79c930reg.h>
   82 #include <dev/ic/am79c930var.h>
   83 #endif
   84 #ifdef __FreeBSD__
   85 #include <dev/awi/am79c930reg.h>
   86 #include <dev/awi/am79c930var.h>
   87 #endif
   89 #define AM930_DELAY(x) /*nothing*/
   91 void am79c930_regdump(struct am79c930_softc *sc);
   93 static void io_write_1(struct am79c930_softc *, u_int32_t, u_int8_t);
   94 static void io_write_2(struct am79c930_softc *, u_int32_t, u_int16_t);
   95 static void io_write_4(struct am79c930_softc *, u_int32_t, u_int32_t);
   96 static void io_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
   98 static u_int8_t io_read_1(struct am79c930_softc *, u_int32_t);
   99 static u_int16_t io_read_2(struct am79c930_softc *, u_int32_t);
  100 static u_int32_t io_read_4(struct am79c930_softc *, u_int32_t);
  101 static void io_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
  103 static void mem_write_1(struct am79c930_softc *, u_int32_t, u_int8_t);
  104 static void mem_write_2(struct am79c930_softc *, u_int32_t, u_int16_t);
  105 static void mem_write_4(struct am79c930_softc *, u_int32_t, u_int32_t);
  106 static void mem_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
  108 static u_int8_t mem_read_1(struct am79c930_softc *, u_int32_t);
  109 static u_int16_t mem_read_2(struct am79c930_softc *, u_int32_t);
  110 static u_int32_t mem_read_4(struct am79c930_softc *, u_int32_t);
  111 static void mem_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
  113 static struct am79c930_ops iospace_ops = {
io_write_1,
io_write_2,
io_write_4,
io_write_bytes,
io_read_1,
io_read_2,
io_read_4,
io_read_bytes
  122 };
  124 struct am79c930_ops memspace_ops = {
mem_write_1,
mem_write_2,
mem_write_4,
mem_write_bytes,
mem_read_1,
mem_read_2,
mem_read_4,
mem_read_bytes
  133 };
  135 static void io_write_1 (sc, off, val)
  136         struct am79c930_softc *sc;
u_int32_t off;
u_int8_t val;
  139 {
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
  142             ((off>>8)& 0x7f));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA, val);
AM930_DELAY(1);
  148 }
  150 static void io_write_2 (sc, off, val)
  151         struct am79c930_softc *sc;
u_int32_t off;
u_int16_t val;
  154 {
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
  157             ((off>>8)& 0x7f));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, val & 0xff);
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA, (val>>8)&0xff);
AM930_DELAY(1);
  165 }
  167 static void io_write_4 (sc, off, val)
  168         struct am79c930_softc *sc;
u_int32_t off;
u_int32_t val;
  171 {
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
  174             ((off>>8)& 0x7f));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,val & 0xff);
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>8)&0xff);
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>16)&0xff);
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,(val>>24)&0xff);
AM930_DELAY(1);
  186 }
  188 static void io_write_bytes (sc, off, ptr, len)
  189         struct am79c930_softc *sc;
u_int32_t off;
u_int8_t *ptr;
size_t len;
  193 {
  194         int i;
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
  198             ((off>>8)& 0x7f));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
AM930_DELAY(1);
  202         for (i=0; i<len; i++)
bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,ptr[i]);
  204 }
  206 static u_int8_t io_read_1 (sc, off)
  207         struct am79c930_softc *sc;
u_int32_t off;
  209 {
u_int8_t val;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
  213             ((off>>8)& 0x7f));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
AM930_DELAY(1);
val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
AM930_DELAY(1);
  219         return val;
  220 }
  222 static u_int16_t io_read_2 (sc, off)
  223         struct am79c930_softc *sc;
u_int32_t off;
  225 {
u_int16_t val;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
  229             ((off>>8)& 0x7f));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
AM930_DELAY(1);
val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
AM930_DELAY(1);
val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8;
AM930_DELAY(1); 
  237         return val;
  238 }
  240 static u_int32_t io_read_4 (sc, off)
  241         struct am79c930_softc *sc;
u_int32_t off;
  243 {
u_int32_t val;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
  247             ((off>>8)& 0x7f));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
AM930_DELAY(1);
val = bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA);
AM930_DELAY(1);
val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 8;
AM930_DELAY(1); 
val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 16;
AM930_DELAY(1); 
val |= bus_space_read_1(sc->sc_iot, sc->sc_ioh, AM79C930_IODPA) << 24;
AM930_DELAY(1); 
  259         return val;
  260 }
  262 static void io_read_bytes (sc, off, ptr, len)
  263         struct am79c930_softc *sc;
u_int32_t off;
u_int8_t *ptr;
size_t len;
  267 {
  268         int i;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
  271             ((off>>8)& 0x7f));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
AM930_DELAY(1);
  275         for (i=0; i<len; i++) 
ptr[i] = bus_space_read_1(sc->sc_iot, sc->sc_ioh,
AM79C930_IODPA);
  278 }
  280 static void mem_write_1 (sc, off, val)
  281         struct am79c930_softc *sc;
u_int32_t off;
u_int8_t val;
  284 {
bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val);
  286 }
  288 static void mem_write_2 (sc, off, val)
  289         struct am79c930_softc *sc;
u_int32_t off;
u_int16_t val;
  292 {
bus_space_tag_t t = sc->sc_memt;
bus_space_handle_t h = sc->sc_memh;
  296         /* could be unaligned */
  297         if ((off & 0x1) == 0)
bus_space_write_2(t, h, off,    val);
  299         else {
bus_space_write_1(t, h, off,    val        & 0xff);
bus_space_write_1(t, h, off+1, (val >>  8) & 0xff);
  302         }
  303 }
  305 static void mem_write_4 (sc, off, val)
  306         struct am79c930_softc *sc;
u_int32_t off;
u_int32_t val;
  309 {
bus_space_tag_t t = sc->sc_memt;
bus_space_handle_t h = sc->sc_memh;
  313         /* could be unaligned */
  314         if ((off & 0x3) == 0)
bus_space_write_4(t, h, off,    val);
  316         else {
bus_space_write_1(t, h, off,    val        & 0xff);
bus_space_write_1(t, h, off+1, (val >>  8) & 0xff);
bus_space_write_1(t, h, off+2, (val >> 16) & 0xff);
bus_space_write_1(t, h, off+3, (val >> 24) & 0xff);
  321         }
  322 }
  324 static void mem_write_bytes (sc, off, ptr, len)
  325         struct am79c930_softc *sc;
u_int32_t off;
u_int8_t *ptr;
size_t len;
  329 {
bus_space_write_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
  331 }
  334 static u_int8_t mem_read_1 (sc, off)
  335         struct am79c930_softc *sc;
u_int32_t off;
  337 {
  338         return bus_space_read_1(sc->sc_memt, sc->sc_memh, off);
  339 }
  341 static u_int16_t mem_read_2 (sc, off)
  342         struct am79c930_softc *sc;
u_int32_t off;
  344 {
  345         /* could be unaligned */
  346         if ((off & 0x1) == 0)
  347                 return bus_space_read_2(sc->sc_memt, sc->sc_memh, off);
  348         else
  349                 return
bus_space_read_1(sc->sc_memt, sc->sc_memh, off  )       |
  351                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8);
  352 }
  354 static u_int32_t mem_read_4 (sc, off)
  355         struct am79c930_softc *sc;
u_int32_t off;
  357 {
  358         /* could be unaligned */
  359         if ((off & 0x3) == 0)
  360                 return bus_space_read_4(sc->sc_memt, sc->sc_memh, off);
  361         else
  362                 return
bus_space_read_1(sc->sc_memt, sc->sc_memh, off  )       |
  364                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8) |
  365                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+2) <<16) |
  366                     (bus_space_read_1(sc->sc_memt, sc->sc_memh, off+3) <<24);
  367 }
  371 static void mem_read_bytes (sc, off, ptr, len)
  372         struct am79c930_softc *sc;
u_int32_t off;
u_int8_t *ptr;
size_t len;
  376 {
bus_space_read_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
  378 }
  383 /*
  384  * Set bits in GCR.
  385  */
  387 void am79c930_gcr_setbits (sc, bits)
  388         struct am79c930_softc *sc;
u_int8_t bits;
  390 {
u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
gcr |= bits;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
  396 }
  398 /*
  399  * Clear bits in GCR.
  400  */
  402 void am79c930_gcr_clearbits (sc, bits)
  403         struct am79c930_softc *sc;
u_int8_t bits;
  405 {
u_int8_t gcr = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
gcr &= ~bits;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_GCR, gcr);
  411 }
u_int8_t am79c930_gcr_read (sc)
  414         struct am79c930_softc *sc;
  415 {
  416         return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
  417 }
  419 #if 0 
  420 void am79c930_regdump (sc) 
  421         struct am79c930_softc *sc;
  422 {
u_int8_t buf[8];
  424         int i;
AM930_DELAY(5);
  427         for (i=0; i<8; i++) {
buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i);
AM930_DELAY(5);
  430         }
printf("am79c930: regdump:");
  432         for (i=0; i<8; i++) {
printf(" %02x", buf[i]);
  434         }
printf("\n");
  436 }
  437 #endif
  439 void am79c930_chip_init (sc, how)
  440         struct am79c930_softc *sc;
  441 {
  442         /* zero the bank select register, and leave it that way.. */
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0);
  444         if (how)
sc->sc_ops = &memspace_ops;
  446         else
sc->sc_ops = &iospace_ops;
  448 }