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

369 lines
9.7 KiB
C

/* $NetBSD: atzsc.c,v 1.35 2003/08/07 16:26:40 agc Exp $ */
/*
* 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. 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.
*
* @(#)dma.c
*/
/*
* Copyright (c) 1994 Christian E. Hopps
*
* 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.
*
* @(#)dma.c
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: atzsc.c,v 1.35 2003/08/07 16:26:40 agc Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <amiga/amiga/custom.h>
#include <amiga/amiga/cc.h>
#include <amiga/amiga/device.h>
#include <amiga/amiga/isr.h>
#include <amiga/dev/dmavar.h>
#include <amiga/dev/sbicreg.h>
#include <amiga/dev/sbicvar.h>
#include <amiga/dev/atzscreg.h>
#include <amiga/dev/zbusvar.h>
void atzscattach(struct device *, struct device *, void *);
int atzscmatch(struct device *, struct cfdata *, void *);
void atzsc_enintr(struct sbic_softc *);
void atzsc_dmastop(struct sbic_softc *);
int atzsc_dmanext(struct sbic_softc *);
int atzsc_dmaintr(void *);
int atzsc_dmago(struct sbic_softc *, char *, int, int);
#ifdef DEBUG
void atzsc_dump(void);
#endif
#ifdef DEBUG
int atzsc_dmadebug = 0;
#endif
CFATTACH_DECL(atzsc, sizeof(struct sbic_softc),
atzscmatch, atzscattach, NULL, NULL);
/*
* if we are an A3000 we are here.
*/
int
atzscmatch(struct device *pdp, struct cfdata *cfp, void *auxp)
{
struct zbus_args *zap;
zap = auxp;
/*
* Check manufacturer and product id.
* I was informed that older boards can be 2 also.
*/
if (zap->manid == 514 && (zap->prodid == 3 || zap->prodid == 2))
return(1);
else
return(0);
}
void
atzscattach(struct device *pdp, struct device *dp, void *auxp)
{
volatile struct sdmac *rp;
struct sbic_softc *sc = (struct sbic_softc *)dp;
struct zbus_args *zap;
struct scsipi_adapter *adapt = &sc->sc_adapter;
struct scsipi_channel *chan = &sc->sc_channel;
zap = auxp;
sc->sc_cregs = rp = zap->va;
/*
* disable ints and reset bank register
*/
rp->CNTR = CNTR_PDMD;
rp->DAWR = DAWR_ATZSC;
sc->sc_enintr = atzsc_enintr;
sc->sc_dmago = atzsc_dmago;
sc->sc_dmanext = atzsc_dmanext;
sc->sc_dmastop = atzsc_dmastop;
sc->sc_dmacmd = 0;
/*
* only 24 bit mem.
*/
sc->sc_flags |= SBICF_BADDMA;
sc->sc_dmamask = ~0x00ffffff;
#if 0
/*
* If the users kva space is not ztwo try and allocate a bounce buffer.
* XXX this needs to change if we move to multiple memory segments.
*/
if (kvtop(sc) & sc->sc_dmamask) {
sc->sc_dmabuffer = (char *)alloc_z2mem(MAXPHYS * 8); /* XXX */
if (isztwomem(sc->sc_dmabuffer))
printf(" bounce pa 0x%x", kvtop(sc->sc_dmabuffer));
else if (sc->sc_dmabuffer)
printf(" bounce pa 0x%x",
PREP_DMA_MEM(sc->sc_dmabuffer));
}
#endif
sc->sc_sbic.sbic_asr_p = (volatile unsigned char *)rp + 0x91;
sc->sc_sbic.sbic_value_p = (volatile unsigned char *)rp + 0x93;
sc->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 77;
printf(": dmamask 0x%lx\n", ~sc->sc_dmamask);
/*
* Fill in the scsipi_adapter.
*/
memset(adapt, 0, sizeof(*adapt));
adapt->adapt_dev = &sc->sc_dev;
adapt->adapt_nchannels = 1;
adapt->adapt_openings = 7;
adapt->adapt_max_periph = 1;
adapt->adapt_request = sbic_scsipi_request;
adapt->adapt_minphys = sbic_minphys;
/*
* Fill in the scsipi_channel.
*/
memset(chan, 0, sizeof(*chan));
chan->chan_adapter = adapt;
chan->chan_bustype = &scsi_bustype;
chan->chan_channel = 0;
chan->chan_ntargets = 8;
chan->chan_nluns = 8;
chan->chan_id = 7;
sbicinit(sc);
sc->sc_isr.isr_intr = atzsc_dmaintr;
sc->sc_isr.isr_arg = sc;
sc->sc_isr.isr_ipl = 2;
add_isr (&sc->sc_isr);
/*
* attach all scsi units on us
*/
config_found(dp, chan, scsiprint);
}
void
atzsc_enintr(struct sbic_softc *dev)
{
volatile struct sdmac *sdp;
sdp = dev->sc_cregs;
dev->sc_flags |= SBICF_INTR;
sdp->CNTR = CNTR_PDMD | CNTR_INTEN;
}
int
atzsc_dmago(struct sbic_softc *dev, char *addr, int count, int flags)
{
volatile struct sdmac *sdp;
sdp = dev->sc_cregs;
/*
* Set up the command word based on flags
*/
dev->sc_dmacmd = CNTR_PDMD | CNTR_INTEN;
if ((flags & DMAGO_READ) == 0)
dev->sc_dmacmd |= CNTR_DDIR;
#ifdef DEBUG
if (atzsc_dmadebug & DDB_IO)
printf("atzsc_dmago: cmd %x\n", dev->sc_dmacmd);
#endif
dev->sc_flags |= SBICF_INTR;
sdp->CNTR = dev->sc_dmacmd;
sdp->ACR = (u_int) dev->sc_cur->dc_addr;
sdp->ST_DMA = 1;
return(dev->sc_tcnt);
}
void
atzsc_dmastop(struct sbic_softc *dev)
{
volatile struct sdmac *sdp;
int s;
sdp = dev->sc_cregs;
#ifdef DEBUG
if (atzsc_dmadebug & DDB_FOLLOW)
printf("atzsc_dmastop()\n");
#endif
if (dev->sc_dmacmd) {
s = splbio();
if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) {
/*
* only FLUSH if terminal count not enabled,
* and reading from peripheral
*/
sdp->FLUSH = 1;
while ((sdp->ISTR & ISTR_FE_FLG) == 0)
;
}
/*
* clear possible interrupt and stop DMA
*/
sdp->CINT = 1;
sdp->SP_DMA = 1;
dev->sc_dmacmd = 0;
splx(s);
}
}
int
atzsc_dmaintr(void *arg)
{
struct sbic_softc *dev = arg;
volatile struct sdmac *sdp;
int stat, found;
sdp = dev->sc_cregs;
stat = sdp->ISTR;
if ((stat & (ISTR_INT_F|ISTR_INT_P)) == 0)
return (0);
#ifdef DEBUG
if (atzsc_dmadebug & DDB_FOLLOW)
printf("%s: dmaintr 0x%x\n", dev->sc_dev.dv_xname, stat);
#endif
/*
* both, SCSI and DMA interrupts arrive here. I chose
* arbitrarily that DMA interrupts should have higher
* precedence than SCSI interrupts.
*/
found = 0;
if (stat & ISTR_E_INT) {
found++;
sdp->CINT = 1; /* clear possible interrupt */
/*
* check for SCSI ints in the same go and
* eventually save an interrupt
*/
}
if (dev->sc_flags & SBICF_INTR && stat & ISTR_INTS)
found += sbicintr(dev);
return(found);
}
int
atzsc_dmanext(struct sbic_softc *dev)
{
volatile struct sdmac *sdp;
sdp = dev->sc_cregs;
if (dev->sc_cur > dev->sc_last) {
/* shouldn't happen !! */
printf("atzsc_dmanext at end !!!\n");
atzsc_dmastop(dev);
return(0);
}
if ((dev->sc_dmacmd & (CNTR_TCEN | CNTR_DDIR)) == 0) {
/*
* only FLUSH if terminal count not enabled,
* and reading from peripheral
*/
sdp->FLUSH = 1;
while ((sdp->ISTR & ISTR_FE_FLG) == 0)
;
}
/*
* clear possible interrupt and stop DMA
*/
sdp->CINT = 1; /* clear possible interrupt */
sdp->SP_DMA = 1; /* stop DMA */
sdp->CNTR = dev->sc_dmacmd;
sdp->ACR = (u_int)dev->sc_cur->dc_addr;
sdp->ST_DMA = 1;
dev->sc_tcnt = dev->sc_cur->dc_count << 1;
return(dev->sc_tcnt);
}
#ifdef DEBUG
void
atzsc_dump(void)
{
extern struct cfdriver atzsc_cd;
int i;
for (i = 0; i < atzsc_cd.cd_ndevs; ++i)
if (atzsc_cd.cd_devs[i])
sbic_dump(atzsc_cd.cd_devs[i]);
}
#endif