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

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/* $NetBSD: siop.c,v 1.19 1995/01/05 07:22:48 chopps Exp $ */
/*
* Copyright (c) 1994 Michael L. Hitch
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Van Jacobson of Lawrence Berkeley Laboratory.
*
* 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.
*
* @(#)siop.c 7.5 (Berkeley) 5/4/91
*/
/*
* AMIGA 53C710 scsi adaptor driver
*/
/* need to know if any tapes have been configured */
#include "st.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/buf.h>
#include <scsi/scsi_all.h>
#include <scsi/scsiconf.h>
#include <machine/cpu.h>
#include <amiga/amiga/custom.h>
#include <amiga/dev/siopreg.h>
#include <amiga/dev/siopvar.h>
extern u_int kvtop();
/*
* SCSI delays
* In u-seconds, primarily for state changes on the SPC.
*/
#define SCSI_CMD_WAIT 500000 /* wait per step of 'immediate' cmds */
#define SCSI_DATA_WAIT 500000 /* wait per data in/out step */
#define SCSI_INIT_WAIT 500000 /* wait per step (both) during init */
int siopicmd __P((struct siop_softc *, int, int, void *, int, void *, int));
int siopgo __P((struct siop_softc *, struct scsi_xfer *));
int siopgetsense __P((struct siop_softc *, struct scsi_xfer *));
void siopabort __P((struct siop_softc *, siop_regmap_p, char *));
void sioperror __P((struct siop_softc *, siop_regmap_p, u_char));
void siopstart __P((struct siop_softc *));
void siopreset __P((struct siop_softc *));
void siopsetdelay __P((int));
void siop_scsidone __P((struct siop_softc *, int));
void siop_donextcmd __P((struct siop_softc *));
int siopintr __P((struct siop_softc *));
/* 53C710 script */
#include <amiga/dev/siop_script.out>
/* default to not inhibit sync negotiation on any drive */
u_char siop_inhibit_sync[8] = { 0, 0, 0, 0, 0, 0, 0 }; /* initialize, so patchable */
u_char siop_allow_disc[8] = {0, 0, 0, 0, 0, 0, 0, 0};
int siop_no_dma = 0;
int siop_reset_delay = 250; /* delay after reset, in milleseconds */
int siop_sync_period = 50; /* synchronous transfer period, in nanoseconds */
int siop_cmd_wait = SCSI_CMD_WAIT;
int siop_data_wait = SCSI_DATA_WAIT;
int siop_init_wait = SCSI_INIT_WAIT;
/*
* sync period transfer lookup - only valid for 66Mhz clock
*/
static struct {
unsigned char x; /* period from sync request message */
unsigned char y; /* siop_period << 4 | sbcl */
} xxx[] = {
{ 60/4, 0<<4 | 1},
{ 76/4, 1<<4 | 1},
{ 92/4, 2<<4 | 1},
{ 92/4, 0<<4 | 2},
{108/4, 3<<4 | 1},
{116/4, 1<<4 | 2},
{120/4, 4<<4 | 1},
{120/4, 0<<4 | 3},
{136/4, 5<<4 | 1},
{140/4, 2<<4 | 2},
{152/4, 6<<4 | 1},
{152/4, 1<<4 | 3},
{164/4, 3<<4 | 2},
{168/4, 7<<4 | 1},
{180/4, 2<<4 | 3},
{184/4, 4<<4 | 2},
{208/4, 5<<4 | 2},
{212/4, 3<<4 | 3},
{232/4, 6<<4 | 2},
{240/4, 4<<4 | 3},
{256/4, 7<<4 | 2},
{272/4, 5<<4 | 3},
{300/4, 6<<4 | 3},
{332/4, 7<<4 | 3}
};
#ifdef DEBUG
#define QPRINTF(a) if (siop_debug > 1) printf a
/*
* 0x01 - full debug
* 0x02 - DMA chaining
* 0x04 - siopintr
* 0x08 - phase mismatch
* 0x10 - panic on phase mismatch
* 0x20 - panic on unhandled exceptions
* 0x100 - disconnect/reconnect
*/
int siop_debug = 0;
int siopsync_debug = 0;
int siopdma_hits = 0;
int siopdma_misses = 0;
int siopchain_ints = 0;
int siopstarts = 0;
int siopints = 0;
int siopphmm = 0;
#else
#define QPRINTF(a)
#endif
/*
* default minphys routine for siop based controllers
*/
void
siop_minphys(bp)
struct buf *bp;
{
/*
* no max transfer at this level
*/
}
/*
* used by specific siop controller
*
*/
int
siop_scsicmd(xs)
struct scsi_xfer *xs;
{
struct siop_pending *pendp;
struct siop_softc *dev;
struct scsi_link *slp;
int flags, s, i;
slp = xs->sc_link;
dev = slp->adapter_softc;
flags = xs->flags;
if (flags & SCSI_DATA_UIO)
panic("siop: scsi data uio requested");
if (dev->sc_xs && flags & SCSI_POLL)
panic("siop_scsicmd: busy");
s = splbio();
pendp = &dev->sc_xsstore[slp->target][slp->lun];
if (pendp->xs) {
splx(s);
return(TRY_AGAIN_LATER);
}
if (dev->sc_xs) {
pendp->xs = xs;
TAILQ_INSERT_TAIL(&dev->sc_xslist, pendp, link);
splx(s);
return(SUCCESSFULLY_QUEUED);
}
pendp->xs = NULL;
dev->sc_xs = xs;
splx(s);
/*
* nothing is pending do it now.
*/
siop_donextcmd(dev);
if (flags & SCSI_POLL)
return(COMPLETE);
return(SUCCESSFULLY_QUEUED);
}
/*
* entered with dev->sc_xs pointing to the next xfer to perform
*/
void
siop_donextcmd(dev)
struct siop_softc *dev;
{
struct scsi_xfer *xs;
struct scsi_link *slp;
int flags, stat, i;
xs = dev->sc_xs;
slp = xs->sc_link;
flags = xs->flags;
if (flags & SCSI_RESET)
siopreset(dev);
xs->cmd->bytes[0] |= slp->lun << 5;
for (i = 0; i < 2; ++i) {
if (dev->sc_iob[i].sc_xs == NULL) {
dev->sc_iob[i].sc_xs = xs;
dev->sc_cur = & dev->sc_iob[i];
dev->sc_iob[i].sc_stat[0] = -1;
break;
}
}
if (dev->sc_cur == NULL)
panic ("siop: too many I/O's");
++dev->sc_active;
#if 0
if (dev->sc_active > 1) {
printf ("active count %d\n", dev->sc_active);
}
#endif
if (flags & SCSI_POLL || siop_no_dma)
stat = siopicmd(dev, slp->target, slp->lun, xs->cmd,
xs->cmdlen, xs->data, xs->datalen);
else if (siopgo(dev, xs) == 0)
return;
else
stat = dev->sc_cur->sc_stat[0];
siop_scsidone(dev, stat);
}
void
siop_scsidone(dev, stat)
struct siop_softc *dev;
int stat;
{
struct siop_pending *pendp;
struct scsi_xfer *xs;
int s, donext;
xs = dev->sc_xs;
#ifdef DIAGNOSTIC
if (xs == NULL)
panic("siop_scsidone");
#endif
/*
* is this right?
*/
xs->status = stat;
if (stat == 0)
xs->resid = 0;
else {
switch(stat) {
case SCSI_CHECK:
if (stat = siopgetsense(dev, xs))
goto bad_sense;
xs->error = XS_SENSE;
break;
case SCSI_BUSY:
xs->error = XS_BUSY;
break;
bad_sense:
default:
xs->error = XS_DRIVER_STUFFUP;
QPRINTF(("siop_scsicmd() bad %x\n", stat));
break;
}
}
xs->flags |= ITSDONE;
--dev->sc_active;
dev->sc_cur->sc_xs = NULL;
dev->sc_cur = NULL;
/*
* if another command is already pending (i.e. it was pre-empted
* by a reconnecting device), make it the current command and
* continue
*/
/*
* grab next command before scsi_done()
* this way no single device can hog scsi resources.
*/
s = splbio();
pendp = dev->sc_xslist.tqh_first;
if (pendp == NULL) {
donext = 0;
dev->sc_xs = NULL;
} else {
donext = 1;
TAILQ_REMOVE(&dev->sc_xslist, pendp, link);
dev->sc_xs = pendp->xs;
pendp->xs = NULL;
}
splx(s);
scsi_done(xs);
if (donext)
siop_donextcmd(dev);
else if (dev->sc_active && dev->sc_xs == NULL) {
/* printf ("siop_scsidone: still active %d\n", dev->sc_active);*/
/* dev->sc_siopp->siop_dsp = dev->sc_scriptspa + Ent_wait_reselect;*/
}
}
int
siopgetsense(dev, xs)
struct siop_softc *dev;
struct scsi_xfer *xs;
{
struct scsi_sense rqs;
struct scsi_link *slp;
int stat;
slp = xs->sc_link;
rqs.opcode = REQUEST_SENSE;
rqs.byte2 = slp->lun << 5;
#ifdef not_yet
rqs.length = xs->req_sense_length ? xs->req_sense_length :
sizeof(xs->sense);
#else
rqs.length = sizeof(xs->sense);
#endif
if (rqs.length > sizeof (xs->sense))
rqs.length = sizeof (xs->sense);
rqs.unused[0] = rqs.unused[1] = rqs.control = 0;
return(siopicmd(dev, slp->target, slp->lun, &rqs, sizeof(rqs),
&xs->sense, rqs.length));
}
void
siopabort(dev, regs, where)
register struct siop_softc *dev;
siop_regmap_p regs;
char *where;
{
int i;
printf ("%s: abort %s: dstat %02x, sstat0 %02x sbcl %02x\n",
dev->sc_dev.dv_xname,
where, regs->siop_dstat, regs->siop_sstat0, regs->siop_sbcl);
if (dev->sc_active > 0) {
#ifdef TODO
SET_SBIC_cmd (regs, SBIC_CMD_ABORT);
WAIT_CIP (regs);
GET_SBIC_asr (regs, asr);
if (asr & (SBIC_ASR_BSY|SBIC_ASR_LCI))
{
/* ok, get more drastic.. */
SET_SBIC_cmd (regs, SBIC_CMD_RESET);
delay(25);
SBIC_WAIT(regs, SBIC_ASR_INT, 0);
GET_SBIC_csr (regs, csr); /* clears interrupt also */
dev->sc_flags &= ~SIOP_SELECTED;
return;
}
do
{
SBIC_WAIT (regs, SBIC_ASR_INT, 0);
GET_SBIC_csr (regs, csr);
}
while ((csr != SBIC_CSR_DISC) && (csr != SBIC_CSR_DISC_1)
&& (csr != SBIC_CSR_CMD_INVALID));
#endif
/* lets just hope it worked.. */
dev->sc_flags &= ~SIOP_SELECTED;
for (i = 0; i < 2; ++i) {
if (dev->sc_iob[i].sc_xs && &dev->sc_iob[i] !=
dev->sc_cur) {
printf ("siopabort: cleanup!\n");
dev->sc_iob[i].sc_xs = NULL;
}
}
dev->sc_active = 0;
}
}
void
siopinitialize(dev)
struct siop_softc *dev;
{
/*
* Need to check that scripts is on a long word boundary
* and that DS is on a long word boundary.
* Also need to verify that dev doesn't span non-contiguous
* physical pages.
*/
dev->sc_scriptspa = kvtop(scripts);
#if 0
dev->sc_dspa = kvtop(&dev->sc_ds);
dev->sc_lunpa = kvtop(&dev->sc_msgout);
dev->sc_statuspa = kvtop(&dev->sc_stat[0]);
dev->sc_msgpa = kvtop(&dev->sc_msg[0]);
#endif
siopreset (dev);
}
void
siopreset(dev)
struct siop_softc *dev;
{
siop_regmap_p regs;
u_int i, s;
u_char my_id, dummy;
regs = dev->sc_siopp;
if (dev->sc_flags & SIOP_ALIVE)
siopabort(dev, regs, "reset");
printf("%s: ", dev->sc_dev.dv_xname); /* XXXX */
s = splbio();
my_id = 7;
/*
* Reset the chip
* XXX - is this really needed?
*/
regs->siop_istat |= SIOP_ISTAT_ABRT; /* abort current script */
regs->siop_istat |= SIOP_ISTAT_RST; /* reset chip */
regs->siop_istat &= ~SIOP_ISTAT_RST;
/*
* Reset SCSI bus (do we really want this?)
*/
regs->siop_sien &= ~SIOP_SIEN_RST;
regs->siop_scntl1 |= SIOP_SCNTL1_RST;
delay(1);
regs->siop_scntl1 &= ~SIOP_SCNTL1_RST;
/* regs->siop_sien |= SIOP_SIEN_RST;*/
/*
* Set up various chip parameters
*/
regs->siop_scntl0 = SIOP_ARB_FULL | SIOP_SCNTL0_EPC | SIOP_SCNTL0_EPG;
regs->siop_dcntl = dev->sc_clock_freq & 0xff;
regs->siop_dmode = 0x80; /* burst length = 4 */
regs->siop_sien = 0x00; /* don't enable interrupts yet */
regs->siop_dien = 0x00; /* don't enable interrupts yet */
regs->siop_scid = 1 << my_id;
regs->siop_dwt = 0x00;
regs->siop_ctest0 |= SIOP_CTEST0_BTD | SIOP_CTEST0_EAN;
regs->siop_ctest7 |= (dev->sc_clock_freq >> 8) & 0xff;
/* will need to re-negotiate sync xfers */
bzero(&dev->sc_sync, sizeof (dev->sc_sync));
i = regs->siop_istat;
if (i & SIOP_ISTAT_SIP)
dummy = regs->siop_sstat0;
if (i & SIOP_ISTAT_DIP)
dummy = regs->siop_dstat;
splx (s);
delay (siop_reset_delay * 1000);
printf("siop id %d reset V%d\n", my_id, regs->siop_ctest8 >> 4);
dev->sc_flags |= SIOP_ALIVE;
dev->sc_flags &= ~(SIOP_SELECTED | SIOP_DMA);
}
/*
* Setup Data Storage for 53C710 and start SCRIPTS processing
*/
void
siop_setup (dev, target, lun, cbuf, clen, buf, len)
struct siop_softc *dev;
int target;
int lun;
u_char *cbuf;
int clen;
u_char *buf;
int len;
{
siop_regmap_p regs = dev->sc_siopp;
int i;
int nchain;
int count, tcount;
char *addr, *dmaend;
struct siop_iob *iob = dev->sc_cur;
#ifdef DEBUG
if (regs->siop_sbcl & SIOP_BSY) {
printf ("ACK! siop was busy: regs %x script %x dsa %x\n",
regs, &scripts, &iob->sc_ds);
/*Debugger();*/
}
i = regs->siop_istat;
if (i & SIOP_ISTAT_DIP) {
int dstat;
dstat = regs->siop_dstat;
}
if (i & SIOP_ISTAT_SIP) {
int sstat;
sstat = regs->siop_sstat0;
}
#endif
dev->sc_istat = 0;
iob->sc_msgout[0] = MSG_IDENTIFY | lun;
/*
* HACK - if no data transfer, allow disconnects
*/
if (/*len == 0 || */ siop_allow_disc[target]) {
iob->sc_msgout[0] = MSG_IDENTIFY_DR | lun;
regs->siop_scntl1 |= SIOP_SCNTL1_ESR;
}
iob->sc_status = 0;
iob->sc_stat[0] = -1;
iob->sc_msg[0] = -1;
iob->sc_ds.scsi_addr = (0x10000 << target) | (dev->sc_sync[target].period << 8);
iob->sc_ds.idlen = 1;
iob->sc_ds.idbuf = (char *) kvtop(&iob->sc_msgout[0]);
iob->sc_ds.cmdlen = clen;
iob->sc_ds.cmdbuf = (char *) kvtop(cbuf);
iob->sc_ds.stslen = 1;
iob->sc_ds.stsbuf = (char *) kvtop(&iob->sc_stat[0]);
iob->sc_ds.msglen = 1;
iob->sc_ds.msgbuf = (char *) kvtop(&iob->sc_msg[0]);
iob->sc_msg[1] = -1;
iob->sc_ds.msginlen = 1;
iob->sc_ds.extmsglen = 1;
iob->sc_ds.synmsglen = 3;
iob->sc_ds.msginbuf = (char *) kvtop(&iob->sc_msg[1]);
iob->sc_ds.extmsgbuf = (char *) kvtop(&iob->sc_msg[2]);
iob->sc_ds.synmsgbuf = (char *) kvtop(&iob->sc_msg[3]);
bzero(&iob->sc_ds.chain, sizeof (iob->sc_ds.chain));
if (dev->sc_sync[target].state == SYNC_START) {
if (siop_inhibit_sync[target]) {
dev->sc_sync[target].state = SYNC_DONE;
dev->sc_sync[target].offset = 0;
dev->sc_sync[target].period = 0;
#ifdef DEBUG
if (siopsync_debug)
printf ("Forcing target %d asynchronous\n", target);
#endif
}
else {
iob->sc_msg[2] = -1;
iob->sc_msgout[1] = MSG_EXT_MESSAGE;
iob->sc_msgout[2] = 3;
iob->sc_msgout[3] = MSG_SYNC_REQ;
iob->sc_msgout[4] = siop_sync_period / 4;
iob->sc_msgout[5] = SIOP_MAX_OFFSET;
iob->sc_ds.idlen = 6;
dev->sc_sync[target].state = SYNC_SENT;
#ifdef DEBUG
if (siopsync_debug)
printf ("Sending sync request to target %d\n", target);
#endif
}
}
/*
* If length is > 1 page, check for consecutive physical pages
* Need to set up chaining if not
*/
iob->iob_buf = buf;
iob->iob_len = len;
iob->iob_curbuf = iob->iob_curlen = 0;
nchain = 0;
count = len;
addr = buf;
dmaend = NULL;
while (count > 0) {
iob->sc_ds.chain[nchain].databuf = (char *) kvtop (addr);
if (count < (tcount = NBPG - ((int) addr & PGOFSET)))
tcount = count;
iob->sc_ds.chain[nchain].datalen = tcount;
addr += tcount;
count -= tcount;
if (iob->sc_ds.chain[nchain].databuf == dmaend) {
dmaend += iob->sc_ds.chain[nchain].datalen;
iob->sc_ds.chain[--nchain].datalen += tcount;
#ifdef DEBUG
++siopdma_hits;
#endif
}
else {
dmaend = iob->sc_ds.chain[nchain].databuf +
iob->sc_ds.chain[nchain].datalen;
iob->sc_ds.chain[nchain].datalen = tcount;
#ifdef DEBUG
if (nchain) /* Don't count miss on first one */
++siopdma_misses;
#endif
}
++nchain;
}
#ifdef DEBUG
if (nchain != 1 && len != 0 && siop_debug & 3) {
printf ("DMA chaining set: %d\n", nchain);
for (i = 0; i < nchain; ++i) {
printf (" [%d] %8x %4x\n", i, iob->sc_ds.chain[i].databuf,
iob->sc_ds.chain[i].datalen);
}
}
if (regs->siop_sbcl & SIOP_BSY) {
printf ("ACK! siop was busy at start: regs %x script %x dsa %x\n",
regs, &scripts, &iob->sc_ds);
/*Debugger();*/
}
#endif
/* push data case on data the 53c710 needs to access */
dma_cachectl (dev, sizeof (struct siop_softc));
dma_cachectl (cbuf, clen);
if (buf != NULL && len != 0)
dma_cachectl (buf, len);
if (dev->sc_active <= 1) {
regs->siop_sbcl = dev->sc_sync[target].offset;
regs->siop_dsa = kvtop(&iob->sc_ds);
/* XXX if disconnected devices pending, this may not work */
regs->siop_dsp = dev->sc_scriptspa;
} else {
regs->siop_istat = SIOP_ISTAT_SIGP;
}
#ifdef DEBUG
++siopstarts;
#endif
}
/*
* Process a DMA or SCSI interrupt from the 53C710 SIOP
*/
int
siop_checkintr(dev, istat, dstat, sstat0, status)
struct siop_softc *dev;
u_char istat;
u_char dstat;
u_char sstat0;
int *status;
{
siop_regmap_p regs = dev->sc_siopp;
struct siop_iob *iob = dev->sc_cur;
int target;
int dfifo, dbc, sstat1;
dfifo = regs->siop_dfifo;
dbc = regs->siop_dbc0;
sstat1 = regs->siop_sstat1;
regs->siop_ctest8 |= SIOP_CTEST8_CLF;
while ((regs->siop_ctest1 & SIOP_CTEST1_FMT) == 0)
;
regs->siop_ctest8 &= ~SIOP_CTEST8_CLF;
#ifdef DEBUG
++siopints;
if (siop_debug & 0x100) {
DCIAS(&iob->sc_stat[0]); /* XXX */
printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n",
istat, dstat, sstat0, regs->siop_dsps, regs->siop_sbcl, iob->sc_stat[0], iob->sc_msg[0]);
printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n",
iob->sc_msg[0], iob->sc_msg[1], iob->sc_msg[2],
iob->sc_msg[3], iob->sc_msg[4], iob->sc_msg[5]);
}
#endif
if (dstat & SIOP_DSTAT_SIR && regs->siop_dsps == 0xff00) {
/* Normal completion status, or check condition */
if (regs->siop_dsa != kvtop(&iob->sc_ds)) {
printf ("siop: invalid dsa: %x %x\n", regs->siop_dsa,
kvtop(&iob->sc_ds));
panic("*** siop DSA invalid ***");
}
target = dev->sc_slave;
if (dev->sc_sync[target].state == SYNC_SENT) {
#ifdef DEBUG
if (siopsync_debug)
printf ("sync msg in: %02x %02x %02x %02x %02x %02x\n",
iob->sc_msg[0], iob->sc_msg[1], iob->sc_msg[2],
iob->sc_msg[3], iob->sc_msg[4], iob->sc_msg[5]);
#endif
if (iob->sc_msg[1] == 0xff)
printf ("%s: target %d ignored sync request\n",
dev->sc_dev.dv_xname, target);
else if (iob->sc_msg[1] == MSG_REJECT)
printf ("%s: target %d rejected sync request\n",
dev->sc_dev.dv_xname, target);
dev->sc_sync[target].state = SYNC_DONE;
dev->sc_sync[target].period = 0;
dev->sc_sync[target].offset = 0;
if (iob->sc_msg[2] == 3 &&
iob->sc_msg[3] == MSG_SYNC_REQ &&
iob->sc_msg[5] != 0) {
if (iob->sc_msg[4] && iob->sc_msg[4] < 100 / 4) {
#ifdef DEBUG
printf ("%d: target %d wanted %dns period\n",
dev->sc_dev.dv_xname, target,
iob->sc_msg[4] * 4);
#endif
/*
* Kludge for Maxtor XT8580S
* It accepts whatever we request, even
* though it won't work. So we ask for
* a short period than we can handle. If
* the device says it can do it, use 208ns.
* If the device says it can do less than
* 100ns, then we limit it to 100ns.
*/
if (iob->sc_msg[4] == siop_sync_period / 4)
iob->sc_msg[4] = 208 / 4;
else
iob->sc_msg[4] = 100 / 4;
}
printf ("%s: target %d now synchronous, period=%dns, offset=%d\n",
dev->sc_dev.dv_xname, target,
iob->sc_msg[4] * 4, iob->sc_msg[5]);
scsi_period_to_siop (dev, target);
}
}
#if 0
DCIAS(dev->sc_statuspa); /* XXX */
#else
dma_cachectl(&iob->sc_stat[0], 1);
#endif
*status = iob->sc_stat[0];
#ifdef DEBUG
if (regs->siop_sbcl & SIOP_BSY) {
/*printf ("ACK! siop was busy at end: regs %x script %x dsa %x\n",
regs, &scripts, &iob->sc_ds);*/
/*Debugger();*/
}
#endif
if (dev->sc_active > 1)
regs->siop_dcntl |= SIOP_DCNTL_STD;
return 1;
}
if (sstat0 & SIOP_SSTAT0_M_A) { /* Phase mismatch */
#ifdef DEBUG
++siopphmm;
if (iob->iob_len) {
int adjust;
adjust = ((dfifo - (dbc & 0x7f)) & 0x7f);
if (sstat1 & SIOP_SSTAT1_ORF)
++adjust;
if (sstat1 & SIOP_SSTAT1_OLF)
++adjust;
iob->iob_curlen = *((long *)&regs->siop_dcmd) & 0xffffff;
iob->iob_curlen += adjust;
iob->iob_curbuf = *((long *)&regs->siop_dnad);
#ifdef DEBUG
if (siop_debug & 0x100)
printf ("Phase mismatch: dnad %x dbc %x dfifo %x dbc %x sstat1 %x adjust %x sbcl %x\n",
iob->iob_curbuf, iob->iob_curlen, dfifo, dbc, sstat1, adjust, regs->siop_sbcl);
#endif
}
if (siop_debug & 9)
printf ("Phase mismatch: %x dsp +%x dcmd %x\n",
regs->siop_sbcl,
regs->siop_dsp - dev->sc_scriptspa,
*((long *)&regs->siop_dcmd));
if (siop_debug & 0x10)
panic ("53c710 phase mismatch");
#endif
if ((regs->siop_sbcl & SIOP_REQ) == 0)
printf ("Phase mismatch: REQ not asserted! %02x\n",
regs->siop_sbcl);
switch (regs->siop_sbcl & 7) {
/*
* For data out and data in phase, check for DMA chaining
*/
case 0: /* data out */
case 1: /* data in */
case 2: /* status */
case 3: /* command */
case 6: /* message in */
case 7: /* message out */
regs->siop_dsp = dev->sc_scriptspa + Ent_switch;
break;
default:
goto bad_phase;
}
return 0;
}
if (sstat0 & SIOP_SSTAT0_STO) { /* Select timed out */
#ifdef DEBUG
if (regs->siop_sbcl & SIOP_BSY) {
printf ("ACK! siop was busy at timeout: regs %x script %x dsa %x\n",
regs, &scripts, &iob->sc_ds);
printf(" sbcl %x sdid %x istat %x dstat %x sstat0 %x\n",
regs->siop_sbcl, regs->siop_sdid, istat, dstat, sstat0);
if (!(regs->siop_sbcl & SIOP_BSY)) {
printf ("Yikes, it's not busy now!\n");
#if 0
*status = -1;
if (dev->sc_active > 1)
regs->siop_dsp = dev->sc_scriptspa + Ent_wait_reselect;
return 1;
#endif
}
/* regs->siop_dcntl |= SIOP_DCNTL_STD;*/
return (0);
Debugger();
}
#endif
*status = -1;
if (dev->sc_active > 1)
regs->siop_dsp = dev->sc_scriptspa + Ent_wait_reselect;
return 1;
}
target = dev->sc_slave;
if (sstat0 & SIOP_SSTAT0_UDC) {
#ifdef DEBUG
printf ("%s: target %d disconnected unexpectedly\n",
dev->sc_dev.dv_xname, target);
#endif
#if 0
siopabort (dev, regs, "siopchkintr");
#endif
*status = STS_BUSY;
if (dev->sc_active > 1)
regs->siop_dsp = dev->sc_scriptspa + Ent_wait_reselect;
return 1;
}
if (dstat & SIOP_DSTAT_SIR && regs->siop_dsps == 0xff0a) {
#ifdef DEBUG
if (siop_debug & 0x100)
printf ("%s: ID %x disconnected TEMP %x (+%d) buf %x len %x buf %x len %x dfifo %x dbc %x sstat1 %x\n",
dev->sc_dev.dv_xname, 1 << target, regs->siop_temp,
regs->siop_temp - dev->sc_scriptspa,
iob->iob_curbuf, iob->iob_curlen,
iob->sc_ds.chain[0].databuf, iob->sc_ds.chain[0].datalen, dfifo, dbc, sstat1);
#endif
/*
* HACK!
* set current entry in disconnect state
* clear current
* if another iob available and another request pending,
* start another
*/
iob->sc_status = dev->sc_flags & (SIOP_SELECTED|SIOP_DMA);
dev->sc_flags &= ~(SIOP_SELECTED|SIOP_DMA);
dev->sc_cur = NULL; /* no current device */
dev->sc_xs = NULL;
/* continue script to wait for reconnect */
regs->siop_dcntl |= SIOP_DCNTL_STD;
if (dev->sc_active < 2) {
struct siop_pending *pendp;
int s = splbio();
/*
* can start another I/O, see if there are
* any pending and start them
*/
if (pendp = dev->sc_xslist.tqh_first) {
TAILQ_REMOVE(&dev->sc_xslist, pendp, link);
dev->sc_xs = pendp->xs;
pendp->xs = NULL;
splx(s);
#ifdef DEBUG
if (siop_debug & 0x100)
printf ("starting a pending command %x\n", dev->sc_xs);
#endif
siop_donextcmd(dev);
}
splx(s);
}
return (0);
}
if (dstat & SIOP_DSTAT_SIR && (regs->siop_dsps == 0xff09 ||
regs->siop_dsps == 0xff06)) {
int i;
#ifdef DEBUG
if (siop_debug & 0x100)
printf ("%s: target reselected %x %x\n",
dev->sc_dev.dv_xname, regs->siop_lcrc,
regs->siop_dsps);
#endif
if (dev->sc_cur) {
printf ("siop: oops - reconnect before current done\n");
/* panic ("siop: what now?");*/
}
/*
* locate iob of reconnecting device
* set dev->sc_cur to iob
*/
for (i = 0, iob = NULL; i < 2; ++i) {
if (dev->sc_iob[i].sc_xs == NULL)
continue;
if (!dev->sc_iob[i].sc_status)
continue;
if (!(regs->siop_lcrc & (dev->sc_iob[i].sc_ds.scsi_addr >> 16)))
continue;
iob = &dev->sc_iob[i];
dev->sc_cur = iob;
dev->sc_xs = iob->sc_xs;
dev->sc_flags |= iob->sc_status;
iob->sc_status = 0;
DCIAS(kvtop(&iob->sc_stat[0]));
regs->siop_dsa = kvtop(&iob->sc_ds);
if (iob->iob_curlen) {
if (iob->iob_curbuf <= (u_long) iob->sc_ds.chain[0].databuf ||
iob->iob_curbuf >= (u_long)(iob->sc_ds.chain[0].databuf + iob->sc_ds.chain[0].datalen))
printf ("%s: saved data pointer not in chain[0]\n");
iob->sc_ds.chain[0].databuf = (char *) iob->iob_curbuf;
iob->sc_ds.chain[0].datalen = iob->iob_curlen;
#ifdef DEBUG
if (siop_debug & 0x100)
printf ("%s: reselect buf %x len %x\n",
dev->sc_dev.dv_xname, iob->iob_curbuf,
iob->iob_curlen);
#endif
DCIAS(kvtop(&iob->sc_ds.chain));
}
}
if (iob == NULL)
panic("unable to find reconnecting device");
regs->siop_dcntl |= SIOP_DCNTL_STD;
return (0);
}
if (dstat & SIOP_DSTAT_SIR && regs->siop_dsps == 0xff07) {
/* reselect was interrupted */
#ifdef DEBUG
if (siop_debug & 0x100 &&
(regs->siop_sfbr & SIOP_CTEST2_SIGP) == 0)
printf ("%s: reselect interrupted (Sig_P?) scntl1 %x ctest2 %x sfbr %x\n",
dev->sc_dev.dv_xname, regs->siop_scntl1, regs->siop_ctest2, regs->siop_sfbr);
#endif
target = dev->sc_xs->sc_link->target;
regs->siop_dsa = kvtop(&dev->sc_cur->sc_ds);
regs->siop_sbcl = dev->sc_sync[target].offset;
regs->siop_dcntl |= SIOP_DCNTL_STD;
return (0);
}
if (sstat0 == 0 && dstat & SIOP_DSTAT_SIR) {
#if 0
DCIAS(dev->sc_statuspa);
#else
dma_cachectl (&iob->sc_stat[0], 1);
#endif
printf ("SIOP interrupt: %x sts %x msg %x sbcl %x\n",
regs->siop_dsps, iob->sc_stat[0], iob->sc_msg[0],
regs->siop_sbcl);
siopreset (dev);
*status = -1;
return 1;
}
if (sstat0 & SIOP_SSTAT0_SGE)
printf ("SIOP: SCSI Gross Error\n");
if (sstat0 & SIOP_SSTAT0_PAR)
printf ("SIOP: Parity Error\n");
if (dstat & SIOP_DSTAT_IID)
printf ("SIOP: Invalid instruction detected\n");
bad_phase:
/*
* temporary panic for unhandled conditions
* displays various things about the 53C710 status and registers
* then panics.
* XXXX need to clean this up to print out the info, reset, and continue
*/
printf ("siopchkintr: target %x ds %x\n", target, &iob->sc_ds);
printf ("scripts %x ds %x regs %x dsp %x dcmd %x\n", dev->sc_scriptspa,
kvtop(&dev->sc_iob), kvtop(regs), regs->siop_dsp,
*((long *)&regs->siop_dcmd));
printf ("siopchkintr: istat %x dstat %x sstat0 %x dsps %x dsa %x sbcl %x sts %x msg %x\n",
istat, dstat, sstat0, regs->siop_dsps, regs->siop_dsa,
regs->siop_sbcl, iob->sc_stat[0], iob->sc_msg[0]);
#ifdef DEBUG
if (siop_debug & 0x20)
panic("siopchkintr: **** temp ****");
#endif
siopreset (dev); /* hard reset */
*status = -1;
return 1;
}
/*
* SCSI 'immediate' command: issue a command to some SCSI device
* and get back an 'immediate' response (i.e., do programmed xfer
* to get the response data). 'cbuf' is a buffer containing a scsi
* command of length clen bytes. 'buf' is a buffer of length 'len'
* bytes for data. The transfer direction is determined by the device
* (i.e., by the scsi bus data xfer phase). If 'len' is zero, the
* command must supply no data. 'xferphase' is the bus phase the
* caller expects to happen after the command is issued. It should
* be one of DATA_IN_PHASE, DATA_OUT_PHASE or STATUS_PHASE.
*
* XXX - 53C710 will use DMA, but no interrupts (it's a heck of a
* lot easier to do than to use programmed I/O).
*
*/
int
siopicmd(dev, target, lun, cbuf, clen, buf, len)
struct siop_softc *dev;
int target;
int lun;
void *cbuf;
int clen;
void *buf;
int len;
{
siop_regmap_p regs = dev->sc_siopp;
struct siop_iob *iob = dev->sc_cur;
int i;
int status;
u_char istat;
u_char dstat;
u_char sstat0;
if (dev->sc_flags & SIOP_SELECTED) {
printf ("siopicmd%d: bus busy\n", target);
return -1;
}
regs->siop_sien = 0x00; /* disable SCSI and DMA interrupts */
regs->siop_dien = 0x00;
dev->sc_flags |= SIOP_SELECTED;
dev->sc_slave = target;
#ifdef DEBUG
if (siop_debug & 1)
printf ("siopicmd: target %x/%x cmd %02x ds %x\n", target,
lun, *((char *)cbuf), &iob->sc_ds);
#endif
siop_setup (dev, target, lun, cbuf, clen, buf, len);
for (;;) {
/* use cmd_wait values? */
i = siop_cmd_wait << 1;
while (((istat = regs->siop_istat) &
(SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0) {
if (--i <= 0) {
printf ("waiting: tgt %d cmd %02x sbcl %02x dsp %x (+%x) dcmd %x ds %x\n",
target, *((char *)cbuf),
regs->siop_sbcl, regs->siop_dsp,
regs->siop_dsp - dev->sc_scriptspa,
*((long *)&regs->siop_dcmd), &iob->sc_ds);
i = siop_cmd_wait << 2;
/* XXXX need an upper limit and reset */
}
delay(10);
}
dstat = regs->siop_dstat;
sstat0 = regs->siop_sstat0;
#ifdef DEBUG
if (siop_debug & 1) {
DCIAS(kvtop(iob->sc_stat[0])); /* XXX should just invalidate dev->sc_stat */
printf ("siopicmd: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n",
istat, dstat, sstat0, regs->siop_dsps, regs->siop_sbcl,
iob->sc_stat[0], iob->sc_msg[0]);
}
#endif
if (siop_checkintr(dev, istat, dstat, sstat0, &status)) {
dev->sc_flags &= ~SIOP_SELECTED;
return (status);
}
}
}
int
siopgo(dev, xs)
struct siop_softc *dev;
struct scsi_xfer *xs;
{
siop_regmap_p regs;
int i;
int nchain;
int count, tcount;
char *addr, *dmaend;
#ifdef DEBUG
if (siop_debug & 1)
printf ("%s: go ", dev->sc_dev.dv_xname);
#if 0
if ((cdb->cdb[1] & 1) == 0 &&
((cdb->cdb[0] == CMD_WRITE && cdb->cdb[2] == 0 && cdb->cdb[3] == 0) ||
(cdb->cdb[0] == CMD_WRITE_EXT && cdb->cdb[2] == 0 && cdb->cdb[3] == 0
&& cdb->cdb[4] == 0)))
panic ("siopgo: attempted write to block < 0x100");
#endif
#endif
#if 0
cdb->cdb[1] |= unit << 5;
#endif
if (dev->sc_flags & SIOP_SELECTED) {
printf ("%s: bus busy\n", dev->sc_dev.dv_xname);
return 1;
}
dev->sc_flags |= SIOP_SELECTED | SIOP_DMA;
dev->sc_slave = xs->sc_link->target;
regs = dev->sc_siopp;
/* enable SCSI and DMA interrupts */
regs->siop_sien = SIOP_SIEN_M_A | SIOP_SIEN_STO | /*SIOP_SIEN_SEL |*/ SIOP_SIEN_SGE |
SIOP_SIEN_UDC | SIOP_SIEN_RST | SIOP_SIEN_PAR;
regs->siop_dien = SIOP_DIEN_BF | SIOP_DIEN_ABRT | SIOP_DIEN_SIR |
/*SIOP_DIEN_WTD |*/ SIOP_DIEN_IID;
#ifdef DEBUG
if (siop_debug & 1)
printf ("siopgo: target %x cmd %02x ds %x\n", dev->sc_slave, xs->cmd->opcode, &dev->sc_cur->sc_ds);
#endif
siop_setup(dev, dev->sc_slave, xs->sc_link->lun, xs->cmd, xs->cmdlen, xs->data, xs->datalen);
return (0);
}
/*
* Check for 53C710 interrupts
*/
int
siopintr (dev)
register struct siop_softc *dev;
{
siop_regmap_p regs;
register u_char istat, dstat, sstat0;
int unit;
int status;
int found = 0;
regs = dev->sc_siopp;
istat = dev->sc_istat;
if ((istat & (SIOP_ISTAT_SIP | SIOP_ISTAT_DIP)) == 0)
return;
if ((dev->sc_flags & (SIOP_DMA | SIOP_SELECTED)) == SIOP_SELECTED)
return; /* doing non-interrupt I/O */
/* Got a valid interrupt on this device */
dstat = dev->sc_dstat;
sstat0 = dev->sc_sstat0;
dev->sc_istat = 0;
#ifdef DEBUG
if (siop_debug & 1)
printf ("%s: intr istat %x dstat %x sstat0 %x\n",
dev->sc_dev.dv_xname, istat, dstat, sstat0);
if (!dev->sc_active) {
printf ("%s: spurious interrupt? istat %x dstat %x sstat0 %x status %x\n",
dev->sc_dev.dv_xname, istat, dstat, sstat0, dev->sc_cur->sc_stat[0]);
}
#endif
#ifdef DEBUG
if (siop_debug & 5) {
DCIAS(kvtop(&dev->sc_cur->sc_stat[0]));
printf ("siopintr%d: istat %x dstat %x sstat0 %x dsps %x sbcl %x sts %x msg %x\n",
unit, istat, dstat, sstat0, regs->siop_dsps,
regs->siop_sbcl, dev->sc_cur->sc_stat[0], dev->sc_cur->sc_msg[0]);
}
#endif
if (siop_checkintr (dev, istat, dstat, sstat0, &status)) {
#if 1
if (dev->sc_active <= 1) { /* more HACK */
regs->siop_sien = 0;
regs->siop_dien = 0;
}
if (status == 0xff)
printf ("siopintr: status == 0xff\n");
#endif
if (dev->sc_flags & SIOP_DMA) {
dev->sc_flags &= ~(SIOP_DMA | SIOP_SELECTED);
if (regs->siop_sbcl & SIOP_BSY)
printf ("siopintr: SCSI bus busy at I/O completion\n");
siop_scsidone(dev, dev->sc_cur->sc_stat[0]);
}
}
}
/*
* This is based on the Progressive Peripherals Zeus driver and may
* not be correct for other 53c710 boards.
*
*/
scsi_period_to_siop (dev, target)
struct siop_softc *dev;
{
int period, offset, i, sxfer;
period = dev->sc_cur->sc_msg[4];
offset = dev->sc_cur->sc_msg[5];
sxfer = 0;
if (offset <= SIOP_MAX_OFFSET)
sxfer = offset;
for (i = 0; i < sizeof (xxx) / 2; ++i) {
if (period <= xxx[i].x) {
sxfer |= xxx[i].y & 0x70;
offset = xxx[i].y & 0x03;
break;
}
}
dev->sc_sync[target].period = sxfer;
dev->sc_sync[target].offset = offset;
#ifdef DEBUG
printf ("sync: siop_sxfr %02x, siop_sbcl %02x\n", sxfer, offset);
#endif
}
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