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/* $OpenBSD: dbdma.c,v 1.1 2001/09/01 15:50:00 drahn Exp $ */
/* $NetBSD: dbdma.c,v 1.2 1998/08/21 16:13:28 tsubai Exp $ */
/*
* Copyright 1991-1998 by Open Software Foundation, Inc.
* All Rights Reserved
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation.
*
* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL OSF BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
* NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include <sys/param.h>
#include <sys/malloc.h>
#include <sys/systm.h>
#include <vm/vm.h>
#include <machine/pio.h>
#include <macppc/mac/dbdma.h>
dbdma_command_t *dbdma_alloc_commands = NULL;
void
dbdma_start(dmap, commands)
dbdma_regmap_t *dmap;
dbdma_command_t *commands;
{
u_int32_t addr = vtophys((vaddr_t)commands);
if (addr & 0xf)
panic("dbdma_start command structure not 16-byte aligned");
DBDMA_ST4_ENDIAN(&dmap->d_intselect, DBDMA_CLEAR_CNTRL( (0xffff)));
DBDMA_ST4_ENDIAN(&dmap->d_control,
DBDMA_CLEAR_CNTRL( (DBDMA_CNTRL_ACTIVE |
DBDMA_CNTRL_DEAD |
DBDMA_CNTRL_WAKE |
DBDMA_CNTRL_FLUSH |
DBDMA_CNTRL_PAUSE |
DBDMA_CNTRL_RUN )));
do {
delay(10);
} while (DBDMA_LD4_ENDIAN(&dmap->d_status) & DBDMA_CNTRL_ACTIVE);
DBDMA_ST4_ENDIAN(&dmap->d_cmdptrhi, 0); /* 64-bit not yet */
DBDMA_ST4_ENDIAN(&dmap->d_cmdptrlo, addr);
DBDMA_ST4_ENDIAN(&dmap->d_control,
DBDMA_SET_CNTRL(DBDMA_CNTRL_RUN|DBDMA_CNTRL_WAKE)|
DBDMA_CLEAR_CNTRL(DBDMA_CNTRL_PAUSE|DBDMA_CNTRL_DEAD) );
}
void
dbdma_stop(dmap)
dbdma_regmap_t *dmap;
{
DBDMA_ST4_ENDIAN(&dmap->d_control, DBDMA_CLEAR_CNTRL(DBDMA_CNTRL_RUN) |
DBDMA_SET_CNTRL(DBDMA_CNTRL_FLUSH));
while (DBDMA_LD4_ENDIAN(&dmap->d_status) &
(DBDMA_CNTRL_ACTIVE|DBDMA_CNTRL_FLUSH));
}
void
dbdma_flush(dmap)
dbdma_regmap_t *dmap;
{
DBDMA_ST4_ENDIAN(&dmap->d_control, DBDMA_SET_CNTRL(DBDMA_CNTRL_FLUSH));
while (DBDMA_LD4_ENDIAN(&dmap->d_status) & (DBDMA_CNTRL_FLUSH));
}
void
dbdma_reset(dmap)
dbdma_regmap_t *dmap;
{
DBDMA_ST4_ENDIAN(&dmap->d_control,
DBDMA_CLEAR_CNTRL( (DBDMA_CNTRL_ACTIVE |
DBDMA_CNTRL_DEAD |
DBDMA_CNTRL_WAKE |
DBDMA_CNTRL_FLUSH |
DBDMA_CNTRL_PAUSE |
DBDMA_CNTRL_RUN )));
while (DBDMA_LD4_ENDIAN(&dmap->d_status) & DBDMA_CNTRL_RUN);
}
void
dbdma_continue(dmap)
dbdma_regmap_t *dmap;
{
DBDMA_ST4_ENDIAN(&dmap->d_control,
DBDMA_SET_CNTRL(DBDMA_CNTRL_RUN | DBDMA_CNTRL_WAKE) |
DBDMA_CLEAR_CNTRL(DBDMA_CNTRL_PAUSE | DBDMA_CNTRL_DEAD));
}
void
dbdma_pause(dmap)
dbdma_regmap_t *dmap;
{
DBDMA_ST4_ENDIAN(&dmap->d_control,DBDMA_SET_CNTRL(DBDMA_CNTRL_PAUSE));
while (DBDMA_LD4_ENDIAN(&dmap->d_status) & DBDMA_CNTRL_ACTIVE)
;
}
dbdma_command_t *
dbdma_alloc(size)
int size;
{
u_int buf;
buf = (u_int)malloc(size + 0x0f, M_DEVBUF, M_WAITOK);
buf = (buf + 0x0f) & ~0x0f;
return (dbdma_command_t *)buf;
}
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