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NetBSD/sys/arch/amiga/dev/mlhdma.c

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9.9 KiB
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/*
* Copyright (c) 1982, 1990 The Regents of the University of California.
* All rights reserved.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*
* @(#)mlhdma.c
* $Id: mlhdma.c,v 1.2 1994/03/25 16:32:29 chopps Exp $
*/
/*
* dummy MLH 5380 DMA driver
*/
#include "mlhscsi.h"
#if NMLHSCSI > 0
#include <sys/param.h>
#include <amiga/dev/device.h>
#include <amiga/dev/scivar.h>
#include <amiga/dev/scireg.h>
#define QPRINTF
#ifdef DEBUG
extern int sci_debug;
#endif
#define HIST(h,w)
extern int sci_data_wait;
static int dma_xfer_in __P((struct sci_softc *dev, int len,
register u_char *buf, int phase));
static int dma_xfer_out __P((struct sci_softc *dev, int len,
register u_char *buf, int phase));
void
mlhdmainit (dev)
struct sci_softc *dev;
{
dev->dma_xfer_in = dma_xfer_in;
dev->dma_xfer_out = dma_xfer_out;
}
static int
dma_xfer_in (dev, len, buf, phase)
struct sci_softc *dev;
int len;
register u_char *buf;
int phase;
{
int wait = sci_data_wait;
u_char csr;
u_char *obp = buf;
#if 1
volatile register u_char *sci_dma = dev->sci_data + 16;
#else
volatile register u_char *sci_dma = dev->sci_data + 12;
#endif
volatile register u_char *sci_csr = dev->sci_csr;
volatile register u_char *sci_icmd = dev->sci_icmd;
csr = *dev->sci_bus_csr;
QPRINTF(("mlhdma_in %d, csr=%02x\n", len, csr));
*dev->sci_tcmd = phase;
*dev->sci_mode |= SCI_MODE_DMA;
*dev->sci_icmd = 0;
*dev->sci_irecv = 0;
while (len > 128) {
wait = sci_data_wait;
while ((*sci_csr & (SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) !=
(SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) {
if (!(*sci_csr & SCI_CSR_PHASE_MATCH)
|| !(*dev->sci_bus_csr & SCI_BUS_BSY)
|| --wait < 0) {
#ifdef DEBUG
if (sci_debug)
printf("mlhdma_in fail: l%d i%x w%d\n",
len, csr, wait);
#endif
HIST(ixin_wait, wait)
*dev->sci_mode &= ~SCI_MODE_DMA;
return 0;
}
}
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
*buf++ = *sci_dma;
len -= 128;
}
while (len > 0) {
wait = sci_data_wait;
while ((*sci_csr & (SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) !=
(SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) {
if (!(*sci_csr & SCI_CSR_PHASE_MATCH)
|| !(*dev->sci_bus_csr & SCI_BUS_BSY)
|| --wait < 0) {
#ifdef DEBUG
if (sci_debug)
printf("mlhdma_in fail: l%d i%x w%d\n",
len, csr, wait);
#endif
HIST(ixin_wait, wait)
*dev->sci_mode &= ~SCI_MODE_DMA;
return 0;
}
}
*buf++ = *sci_dma;
len--;
}
QPRINTF(("mlhdma_in {%d} %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
len, obp[0], obp[1], obp[2], obp[3], obp[4], obp[5],
obp[6], obp[7], obp[8], obp[9]));
HIST(ixin_wait, wait)
*dev->sci_mode &= ~SCI_MODE_DMA;
return 0;
}
static int
dma_xfer_out (dev, len, buf, phase)
struct sci_softc *dev;
int len;
register u_char *buf;
int phase;
{
int wait = sci_data_wait;
u_char csr;
u_char *obp = buf;
volatile register u_char *sci_dma = dev->sci_data + 16;
volatile register u_char *sci_csr = dev->sci_csr;
volatile register u_char *sci_icmd = dev->sci_icmd;
csr = *dev->sci_bus_csr;
QPRINTF(("mlhdma_xfer %d, csr=%02x\n", len, csr));
QPRINTF(("mlhgdma_out {%d} %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
len, buf[0], buf[1], buf[2], buf[3], buf[4], buf[5],
buf[6], buf[7], buf[8], buf[9]));
*dev->sci_tcmd = phase;
*dev->sci_mode |= SCI_MODE_DMA;
*dev->sci_icmd = SCI_ICMD_DATA;
*dev->sci_dma_send = 0;
while (len > 64) {
wait = sci_data_wait;
while ((*sci_csr & (SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) !=
(SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) {
if (!(*sci_csr & SCI_CSR_PHASE_MATCH)
|| !(*dev->sci_bus_csr & SCI_BUS_BSY)
|| --wait < 0) {
#ifdef DEBUG
if (sci_debug)
printf("mlhdma_out fail: l%d i%x w%d\n",
len, csr, wait);
#endif
HIST(ixin_wait, wait)
*dev->sci_mode &= ~SCI_MODE_DMA;
return 0;
}
}
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
*sci_dma = *buf++;
len -= 64;
}
while (len > 0) {
wait = sci_data_wait;
while ((*sci_csr & (SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) !=
(SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) {
if (!(*sci_csr & SCI_CSR_PHASE_MATCH)
|| !(*dev->sci_bus_csr & SCI_BUS_BSY)
|| --wait < 0) {
#ifdef DEBUG
if (sci_debug)
printf("mlhdma_out fail: l%d i%x w%d\n",
len, csr, wait);
#endif
HIST(ixin_wait, wait)
*dev->sci_mode &= ~SCI_MODE_DMA;
return 0;
}
}
*sci_dma = *buf++;
len--;
}
wait = sci_data_wait;
while ((*sci_csr & (SCI_CSR_DREQ|SCI_CSR_PHASE_MATCH)) ==
SCI_CSR_PHASE_MATCH && --wait);
HIST(ixin_wait, wait)
*dev->sci_mode &= ~SCI_MODE_DMA;
return 0;
}
#endif
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