369 lines
9.7 KiB
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
|