NetBSD/sys/arch/arm26/podulebus/asc.c

470 lines
10 KiB
C

/* $NetBSD: asc.c,v 1.1 2000/05/09 21:56:03 bjh21 Exp $ */
/*
* Copyright (c) 1996 Mark Brinicombe
* 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.
*
* from:ahsc.c
*/
/*
* Driver for the Acorn SCSI card using the SBIC (WD3393) generic driver
*
* Thanks to Acorn for supplying programming information on this card.
*/
/*
* Ok this driver is not wonderful yet. It only supports POLLING mode
* The Acorn SCSI card (or any WD3393 based card) does not support
* DMA so the DMA section of this driver and the sbic driver needs
* to be rewritten.
*/
#include "opt_ddb.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <dev/scsipi/scsi_all.h>
#include <dev/scsipi/scsipi_all.h>
#include <dev/scsipi/scsiconf.h>
#include <arm26/podulebus/podulebus.h>
#include <arm26/podulebus/sbicreg.h>
#include <arm26/podulebus/sbicvar.h>
#include <arm26/podulebus/ascreg.h>
#include <arm26/podulebus/ascvar.h>
#include <arm32/podulebus/podules.h>
void ascattach __P((struct device *, struct device *, void *));
int ascmatch __P((struct device *, struct cfdata *, void *));
void asc_enintr __P((struct sbic_softc *));
void asc_dmastop __P((struct sbic_softc *));
int asc_dmanext __P((struct sbic_softc *));
int asc_dmaintr __P((struct sbic_softc *));
int asc_dmago __P((struct sbic_softc *, char *, int, int));
int asc_scsicmd __P((struct scsipi_xfer *xs));
int asc_intr __P((void *arg));
void asc_minphys __P((struct buf *bp));
struct scsipi_device asc_scsidev = {
NULL, /* use default error handler */
NULL, /* do not have a start functio */
NULL, /* have no async handler */
NULL, /* Use default done routine */
};
#ifdef DEBUG
int asc_dmadebug = 0;
#endif
struct cfattach asc_ca = {
sizeof(struct asc_softc), ascmatch, ascattach
};
extern struct cfdriver asc_cd;
u_long scsi_nosync;
int shift_nosync;
#if ASC_POLL > 0
int asc_poll = 0;
#endif
int
ascmatch(pdp, cf, auxp)
struct device *pdp;
struct cfdata *cf;
void *auxp;
{
struct podulebus_attach_args *pa = auxp;
/* Look for the card */
if (matchpodule(pa, MANUFACTURER_ACORN, PODULE_ACORN_SCSI, -1) == 0)
return(0);
if (strncmp(pa->pa_descr, "MCS", 3) == 0)
return(0);
return(1);
}
void
ascattach(pdp, dp, auxp)
struct device *pdp, *dp;
void *auxp;
{
/* volatile struct sdmac *rp;*/
struct asc_softc *sc;
struct sbic_softc *sbic;
struct podulebus_attach_args *pa;
sc = (struct asc_softc *)dp;
pa = auxp;
sc->sc_podule_number = pa->pa_slotnum;
sbic = &sc->sc_softc;
sbic->sc_enintr = asc_enintr;
sbic->sc_dmago = asc_dmago;
sbic->sc_dmanext = asc_dmanext;
sbic->sc_dmastop = asc_dmastop;
sbic->sc_dmacmd = 0;
/*
* eveything is a valid dma address
*/
sbic->sc_dmamask = 0;
sbic->sc_sbicp = (sbic_regmap_p) (pa->pa_memc_h + ASC_SBIC);
sbic->sc_clkfreq = sbic_clock_override ? sbic_clock_override : 143;
sbic->sc_adapter.scsipi_cmd = asc_scsicmd;
sbic->sc_adapter.scsipi_minphys = asc_minphys;
sbic->sc_link.scsipi_scsi.channel = SCSI_CHANNEL_ONLY_ONE;
sbic->sc_link.adapter_softc = sbic;
sbic->sc_link.scsipi_scsi.adapter_target = 7;
sbic->sc_link.adapter = &sbic->sc_adapter;
sbic->sc_link.device = &asc_scsidev;
sbic->sc_link.openings = 1; /* was 2 */
sbic->sc_link.scsipi_scsi.max_target = 7;
sbic->sc_link.scsipi_scsi.max_lun = 7;
sbic->sc_link.type = BUS_SCSI;
printf(": hostid=%d", sbic->sc_link.scsipi_scsi.adapter_target);
#if ASC_POLL > 0
if (asc_poll)
printf(" polling");
#endif
printf("\n");
sc->sc_pagereg = pa->pa_fast_h + ASC_PAGEREG;
sc->sc_intstat = pa->pa_fast_h + ASC_INTSTATUS;
/* Reset the card */
WriteByte(sc->sc_pagereg, 0x80);
DELAY(500000);
WriteByte(sc->sc_pagereg, 0x00);
DELAY(250000);
sbicinit(sbic);
if (!asc_poll) {
sc->sc_ih =
podulebus_irq_establish(sc->sc_softc.sc_dev.dv_parent,
pa->pa_slotnum, IPL_BIO, asc_intr, sc);
irq_enable(sc->sc_ih);
}
/*
* attach all scsi units on us
*/
config_found(dp, &sbic->sc_link, scsiprint);
}
void
asc_enintr(sbicsc)
struct sbic_softc *sbicsc;
{
struct asc_softc *sc = (struct asc_softc *)sbicsc;
/* printf("asc_enintr\n");*/
/*
volatile struct sdmac *sdp;
sdp = dev->sc_cregs;
dev->sc_flags |= SBICF_INTR;
sdp->CNTR = CNTR_PDMD | CNTR_INTEN;
*/
sbicsc->sc_flags |= SBICF_INTR;
WriteByte(sc->sc_pagereg, 0x40);
}
int
asc_dmago(dev, addr, count, flags)
struct sbic_softc *dev;
char *addr;
int count, flags;
{
printf("asc_dmago(addr=%p, count=%d,flags=%d)\n", addr, count, flags);
printf("dmago: dc_addr=%p tcnt=%lx\n", dev->sc_cur->dc_addr, dev->sc_tcnt);
#ifdef DDB
Debugger();
#else
panic("Hit a brick wall\n");
#endif
#if 0
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 (ahsc_dmadebug & DDB_IO)
printf("ahsc_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);
#endif
return(0);
}
void
asc_dmastop(dev)
struct sbic_softc *dev;
{
/* printf("asc_dmastop\n");*/
#if 0
volatile struct sdmac *sdp;
int s;
sdp = dev->sc_cregs;
#ifdef DEBUG
if (ahsc_dmadebug & DDB_FOLLOW)
printf("ahsc_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);
}
#endif
}
int
asc_dmaintr(dev)
struct sbic_softc *dev;
{
panic("asc_dmaintr");
#if 0
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 (ahsc_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);
#endif
return(0);
}
int
asc_dmanext(dev)
struct sbic_softc *dev;
{
printf("asc_dmanext\n");
#ifdef DDB
Debugger();
#else
panic("Hit a brick wall\n");
#endif
#if 0
volatile struct sdmac *sdp;
int i, stat;
sdp = dev->sc_cregs;
if (dev->sc_cur > dev->sc_last) {
/* shouldn't happen !! */
printf("ahsc_dmanext at end !!!\n");
asc_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);
#endif
return(0);
}
void
asc_dump()
{
int i;
for (i = 0; i < asc_cd.cd_ndevs; ++i)
if (asc_cd.cd_devs[i])
sbic_dump(asc_cd.cd_devs[i]);
}
int
asc_scsicmd(xs)
struct scsipi_xfer *xs;
{
/* struct scsipi_link *sc_link = xs->sc_link;*/
/* ensure command is polling for the moment */
#if ASC_POLL > 0
if (asc_poll)
xs->xs_control |= XS_CTL_POLL;
#endif
/* printf("id=%d lun=%dcmdlen=%d datalen=%d opcode=%02x flags=%08x status=%02x blk=%02x %02x\n",
sc_link->scsipi_scsi.target, sc_link->scsipi_scsi.lun, xs->cmdlen, xs->datalen, xs->cmd->opcode,
xs->xs_control, xs->status, xs->cmd->bytes[0], xs->cmd->bytes[1]);*/
return(sbic_scsicmd(xs));
}
int
asc_intr(arg)
void *arg;
{
struct asc_softc *sc = arg;
int intr;
/* printf("ascintr:");*/
intr = ReadByte(sc->sc_intstat);
/* printf("%02x\n", intr);*/
if (intr & IS_SBIC_IRQ)
return sbicintr((struct sbic_softc *)sc);
return(0); /* Pass interrupt on down the chain */
}
void alloc_z2mem()
{
panic("allocz2mem");
}
void isztwomem()
{
panic("isz2mem");
}
void PREP_DMA_MEM()
{
panic("PREP_DMA_MEM");
}
/*
* limit the transfer as required.
*/
void
asc_minphys(bp)
struct buf *bp;
{
#if 0
/*
* We must limit the DMA xfer size
*/
if (bp->b_bcount > MAX_DMA_LEN) {
printf("asc: Reducing dma length\n");
bp->b_bcount = MAX_DMA_LEN;
}
#endif
minphys(bp);
}