NetBSD-5.0.2/sys/dev/ic/am79c930.c
/* $NetBSD: am79c930.c,v 1.16 2008/04/28 20:23:49 martin Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Bill Sommerfeld
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Am79c930 chip driver.
*
* This is used by the awi driver to use the shared
* memory attached to the 79c930 to communicate with the firmware running
* in the 930's on-board 80188 core.
*
* The 79c930 can be mapped into just I/O space, or also have a
* memory mapping; the mapping must be set up by the bus front-end
* before am79c930_init is called.
*/
/*
* operations:
*
* read_8, read_16, read_32, read_64, read_bytes
* write_8, write_16, write_32, write_64, write_bytes
* (two versions, depending on whether memory-space or i/o space is in use).
*
* interrupt E.C.
* start isr
* end isr
*/
#include <sys/cdefs.h>
#ifdef __NetBSD__
__KERNEL_RCSID(0, "$NetBSD: am79c930.c,v 1.16 2008/04/28 20:23:49 martin Exp $");
#endif
#ifdef __FreeBSD__
__FBSDID("$FreeBSD$");
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/endian.h>
#ifndef __FreeBSD__
#include <sys/device.h>
#endif
#include <sys/cpu.h>
#ifdef __FreeBSD__
#include <machine/bus_pio.h>
#include <machine/bus_memio.h>
#endif
#include <sys/bus.h>
#ifdef __NetBSD__
#include <sys/intr.h>
#endif
#ifdef __NetBSD__
#include <dev/ic/am79c930reg.h>
#include <dev/ic/am79c930var.h>
#endif
#ifdef __FreeBSD__
#include <dev/awi/am79c930reg.h>
#include <dev/awi/am79c930var.h>
#endif
#define AM930_DELAY(x) /*nothing*/
#ifndef __BUS_SPACE_HAS_STREAM_METHODS
#define bus_space_read_stream_2 bus_space_read_2
#define bus_space_read_stream_4 bus_space_read_4
#define bus_space_write_stream_2 bus_space_write_2
#define bus_space_write_stream_4 bus_space_write_4
#endif /* __BUS_SPACE_HAS_STREAM_METHODS */
void am79c930_regdump(struct am79c930_softc *sc);
static void io_write_1(struct am79c930_softc *, u_int32_t, u_int8_t);
static void io_write_2(struct am79c930_softc *, u_int32_t, u_int16_t);
static void io_write_4(struct am79c930_softc *, u_int32_t, u_int32_t);
static void io_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
static u_int8_t io_read_1(struct am79c930_softc *, u_int32_t);
static u_int16_t io_read_2(struct am79c930_softc *, u_int32_t);
static u_int32_t io_read_4(struct am79c930_softc *, u_int32_t);
static void io_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
static void mem_write_1(struct am79c930_softc *, u_int32_t, u_int8_t);
static void mem_write_2(struct am79c930_softc *, u_int32_t, u_int16_t);
static void mem_write_4(struct am79c930_softc *, u_int32_t, u_int32_t);
static void mem_write_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
static u_int8_t mem_read_1(struct am79c930_softc *, u_int32_t);
static u_int16_t mem_read_2(struct am79c930_softc *, u_int32_t);
static u_int32_t mem_read_4(struct am79c930_softc *, u_int32_t);
static void mem_read_bytes(struct am79c930_softc *, u_int32_t, u_int8_t *, size_t);
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
};
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
};
static void
io_write_1( struct am79c930_softc *sc, u_int32_t off, u_int8_t val)
{
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
((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);
}
static void
io_write_2(struct am79c930_softc *sc, u_int32_t off, u_int16_t val)
{
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
((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);
}
static void
io_write_4(struct am79c930_softc *sc, u_int32_t off, u_int32_t val)
{
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
((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);
}
static void
io_write_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
size_t len)
{
int i;
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
((off>>8)& 0x7f));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_LMA_LO, (off&0xff));
AM930_DELAY(1);
for (i=0; i<len; i++)
bus_space_write_1(sc->sc_iot,sc->sc_ioh,AM79C930_IODPA,ptr[i]);
}
static u_int8_t
io_read_1(struct am79c930_softc *sc, u_int32_t off)
{
u_int8_t val;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
((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);
return val;
}
static u_int16_t
io_read_2(struct am79c930_softc *sc, u_int32_t off)
{
u_int16_t val;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
((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);
return val;
}
static u_int32_t
io_read_4(struct am79c930_softc *sc, u_int32_t off)
{
u_int32_t val;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
((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);
return val;
}
static void
io_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
size_t len)
{
int i;
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_HI,
((off>>8)& 0x7f));
AM930_DELAY(1);
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_LMA_LO, (off&0xff));
AM930_DELAY(1);
for (i=0; i<len; i++)
ptr[i] = bus_space_read_1(sc->sc_iot, sc->sc_ioh,
AM79C930_IODPA);
}
static void
mem_write_1(struct am79c930_softc *sc, u_int32_t off, u_int8_t val)
{
bus_space_write_1(sc->sc_memt, sc->sc_memh, off, val);
}
static void
mem_write_2(struct am79c930_softc *sc, u_int32_t off, u_int16_t val)
{
bus_space_tag_t t = sc->sc_memt;
bus_space_handle_t h = sc->sc_memh;
/* could be unaligned */
if ((off & 0x1) == 0)
bus_space_write_stream_2(t, h, off, htole16(val));
else {
bus_space_write_1(t, h, off, val & 0xff);
bus_space_write_1(t, h, off+1, (val >> 8) & 0xff);
}
}
static void
mem_write_4(struct am79c930_softc *sc, u_int32_t off, u_int32_t val)
{
bus_space_tag_t t = sc->sc_memt;
bus_space_handle_t h = sc->sc_memh;
/* could be unaligned */
if ((off & 0x3) == 0)
bus_space_write_stream_4(t, h, off, htole32(val));
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);
}
}
static void
mem_write_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
size_t len)
{
bus_space_write_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
}
static u_int8_t
mem_read_1(struct am79c930_softc *sc, u_int32_t off)
{
return bus_space_read_1(sc->sc_memt, sc->sc_memh, off);
}
static u_int16_t
mem_read_2(struct am79c930_softc *sc, u_int32_t off)
{
/* could be unaligned */
if ((off & 0x1) == 0)
return le16toh(bus_space_read_stream_2(sc->sc_memt,
sc->sc_memh, off));
else
return
bus_space_read_1(sc->sc_memt, sc->sc_memh, off ) |
(bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8);
}
static u_int32_t
mem_read_4(struct am79c930_softc *sc, u_int32_t off)
{
/* could be unaligned */
if ((off & 0x3) == 0)
return le32toh(bus_space_read_stream_4(sc->sc_memt, sc->sc_memh,
off));
else
return
bus_space_read_1(sc->sc_memt, sc->sc_memh, off ) |
(bus_space_read_1(sc->sc_memt, sc->sc_memh, off+1) << 8) |
(bus_space_read_1(sc->sc_memt, sc->sc_memh, off+2) <<16) |
(bus_space_read_1(sc->sc_memt, sc->sc_memh, off+3) <<24);
}
static void
mem_read_bytes(struct am79c930_softc *sc, u_int32_t off, u_int8_t *ptr,
size_t len)
{
bus_space_read_region_1 (sc->sc_memt, sc->sc_memh, off, ptr, len);
}
/*
* Set bits in GCR.
*/
void
am79c930_gcr_setbits(struct am79c930_softc *sc, u_int8_t bits)
{
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);
}
/*
* Clear bits in GCR.
*/
void
am79c930_gcr_clearbits(struct am79c930_softc *sc, u_int8_t bits)
{
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);
}
u_int8_t
am79c930_gcr_read(struct am79c930_softc *sc)
{
return bus_space_read_1 (sc->sc_iot, sc->sc_ioh, AM79C930_GCR);
}
#if 0
void
am79c930_regdump(struct am79c930_softc *sc)
{
u_int8_t buf[8];
int i;
AM930_DELAY(5);
for (i=0; i<8; i++) {
buf[i] = bus_space_read_1 (sc->sc_iot, sc->sc_ioh, i);
AM930_DELAY(5);
}
printf("am79c930: regdump:");
for (i=0; i<8; i++) {
printf(" %02x", buf[i]);
}
printf("\n");
}
#endif
void
am79c930_chip_init(struct am79c930_softc *sc, int how)
{
/* zero the bank select register, and leave it that way.. */
bus_space_write_1(sc->sc_iot, sc->sc_ioh, AM79C930_BSS, 0);
if (how)
sc->sc_ops = &memspace_ops;
else
sc->sc_ops = &iospace_ops;
}