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/* $NetBSD: dmavar.h,v 1.4 1994/11/27 00:08:34 deraadt Exp $ */
/*
* Copyright (c) 1994 Peter Galbavy
* Copyright (c) 1995 Theo de Raadt
* 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 Peter Galbavy and
* Theo de Raadt.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
struct dma_softc {
struct device sc_dev; /* us as a device */
struct sbusdev sc_sd; /* sbus device */
struct esp_softc *sc_esp; /* my scsi */
struct dma_regs *sc_regs; /* the registers */
int sc_active; /* DMA active ? */
int sc_rev; /* revision */
int sc_node; /* PROM node ID */
size_t sc_segsize; /* current operation */
void **sc_dmaaddr;
size_t *sc_dmalen;
char sc_dmapolling; /* ... is polled */
char sc_dmadev2mem; /* transfer direction */
};
void dmareset __P((struct dma_softc *sc));
void dmastart __P((struct dma_softc *sc, void *addr,
size_t *len, int datain, int poll));
int dmaintr __P((struct dma_softc *sc, int restart));
int dmapending __P((struct dma_softc *sc));
void dmadrain __P((struct dma_softc *sc));
void dmaenintr __P((struct dma_softc *sc));
int dmadisintr __P((struct dma_softc *sc));
#define DMACSR(sc) (sc->sc_regs->csr)
#define DMADDR(sc) (sc->sc_regs->addr)
#define DMABCNT(sc) (sc->sc_regs->bcnt)
#define TIME_WAIT(cond, msg, sc) { \
int count = 500000; \
while (--count > 0 && (cond)) \
DELAY(1); \
if (count == 0) { \
printf("CSR = %x\n", (sc)->sc_regs->csr); \
panic(msg); \
} \
}
#define DMAWAIT_PEND(sc) \
TIME_WAIT((DMACSR(sc) & D_R_PEND), \
"DMAWAIT_PEND", sc)
/* keep punching the chip until it's flushed */
#define DMAWAIT_DRAIN(sc) \
TIME_WAIT((DMACSR(sc) |= D_DRAIN, DMACSR(sc) & D_DRAINING), \
"DMAWAIT_DRAIN", sc)
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