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Diffstat (limited to 'sys/arch/mvme68k/dev')
-rw-r--r--sys/arch/mvme68k/dev/sbic.c272
1 files changed, 161 insertions, 111 deletions
diff --git a/sys/arch/mvme68k/dev/sbic.c b/sys/arch/mvme68k/dev/sbic.c
index d8faa00d799..f08f0efd2e5 100644
--- a/sys/arch/mvme68k/dev/sbic.c
+++ b/sys/arch/mvme68k/dev/sbic.c
@@ -1,4 +1,5 @@
-/* $OpenBSD: sbic.c,v 1.3 1996/04/28 11:24:44 deraadt Exp $ */
+/* $OpenBSD: sbic.c,v 1.4 1996/05/10 12:42:02 deraadt Exp $ */
+/* $NetBSD: sbic.c,v 1.2 1996/04/23 16:32:54 chuck Exp $ */
/*
* Changes Copyright (c) 1996 Steve Woodford
@@ -806,7 +807,7 @@ sbicabort(dev, where)
dev->sc_dev.dv_xname, asr);
sbicreset(dev);
dev->sc_flags &= ~SBICF_SELECTED;
- return -1;
+ return SBIC_STATE_ERROR;
}
printf("%s: sbicabort - sending DISC command\n", dev->sc_dev.dv_xname);
@@ -826,7 +827,7 @@ sbicabort(dev, where)
dev->sc_flags &= ~SBICF_SELECTED;
}
- return -1;
+ return SBIC_STATE_ERROR;
}
@@ -1004,15 +1005,6 @@ sbicselectbus(dev)
SET_SBIC_selid(regs, target);
SET_SBIC_timeo(regs, SBIC_TIMEOUT(250, dev->sc_clkfreq));
- /*
- * set sync or async
- */
- if ( dev->sc_sync[target].state == SYNC_DONE )
- SET_SBIC_syn(regs, SBIC_SYN(dev->sc_sync[target].offset,
- dev->sc_sync[target].period));
- else
- SET_SBIC_syn(regs, SBIC_SYN(0, sbic_min_period));
-
GET_SBIC_asr(regs, asr);
if ( asr & (SBIC_ASR_INT|SBIC_ASR_BSY) ) {
@@ -1094,7 +1086,7 @@ sbicselectbus(dev)
/*
* Enable (or not) reselection
* XXXSCW This is probably not necessary since we don't use use the
- * Select-and-Xfer-with-ATN command to initialte a selection...
+ * Select-and-Xfer-with-ATN command to initiate a selection...
*/
if ( !sbic_enable_reselect && dev->nexus_list.tqh_first == NULL)
SET_SBIC_rselid (regs, 0);
@@ -1172,11 +1164,43 @@ sbicselectbus(dev)
GET_SBIC_csr(regs, csr);
}
+ /*
+ * set sync or async
+ */
+ if ( dev->sc_sync[target].state == SYNC_DONE ) {
+#ifdef DEBUG
+ if ( sync_debug )
+ printf("select(%d): sync reg = 0x%02x\n", target,
+ SBIC_SYN(dev->sc_sync[target].offset,
+ dev->sc_sync[target].period));
+#endif
+ SET_SBIC_syn(regs, SBIC_SYN(dev->sc_sync[target].offset,
+ dev->sc_sync[target].period));
+ } else {
+#ifdef DEBUG
+ if ( sync_debug )
+ printf("select(%d): sync reg = 0x%02x\n", target,
+ SBIC_SYN(0,sbic_min_period));
+#endif
+ SET_SBIC_syn(regs, SBIC_SYN(0, sbic_min_period));
+ }
+
return csr;
}
/*
- * Information Transfer *to* a Scsi Target
+ * Information Transfer *to* a Scsi Target.
+ *
+ * Note: Don't expect there to be an interrupt immediately after all
+ * the data is transferred out. The WD spec sheet says that the Transfer-
+ * Info command for non-MSG_IN phases only completes when the target
+ * next asserts 'REQ'. That is, when the SCSI bus changes to a new state.
+ *
+ * This can have a nasty effect on commands which take a relatively long
+ * time to complete, for example a START/STOP unit command may remain in
+ * CMD phase until the disk has spun up. Only then will the target change
+ * to STATUS phase. This is really only a problem for immediate commands
+ * since we don't allow disconnection for them (yet).
*/
int
sbicxfout(regs, len, bp)
@@ -1223,17 +1247,14 @@ sbicxfout(regs, len, bp)
wait = sbic_data_wait;
}
- } while ( (asr & SBIC_ASR_INT) == 0 && wait-- > 0 );
-
- SBIC_TC_GET(regs, len);
- SBIC_TC_PUT(regs, 0);
+ } while ( len && (asr & SBIC_ASR_INT) == 0 && wait-- > 0 );
#ifdef DEBUG
QPRINTF(("sbicxfout done: %d bytes remaining (wait:%d)\n", len, wait));
#endif
/*
- * this leaves with one csr to be read
+ * Normally, an interrupt will be pending when this routing returns.
*/
return(len);
}
@@ -1302,6 +1323,10 @@ sbicxfin(regs, len, bp)
* 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.
+ *
+ * Note that although this routine looks like it can handle disconnect/
+ * reselect, the fact is that it can't. There is still some work to be
+ * done to clean this lot up.
*/
int
sbicicmd(dev, cbuf, clen, buf, len)
@@ -1315,7 +1340,10 @@ sbicicmd(dev, cbuf, clen, buf, len)
struct sbic_acb *acb = dev->sc_nexus;
u_char csr,
asr;
- int still_busy = 1;
+ int still_busy = SBIC_STATE_RUNNING;
+#ifdef DEBUG
+ int counter = 0;
+#endif
/*
* Make sure pointers are OK
@@ -1352,106 +1380,113 @@ sbicicmd(dev, cbuf, clen, buf, len)
/*
* select the SCSI bus (it's an error if bus isn't free)
*/
- if ( (dev->sc_flags & SBICF_SELECTED) == 0 ) {
+ if ( (dev->sc_flags & SBICF_SELECTED) == 0 &&
+ still_busy != SBIC_STATE_DISCONNECT ) {
if ( (csr = sbicselectbus(dev)) == 0 ) {
dev->sc_flags &= ~SBICF_ICMD;
return(-1);
}
} else
+ if ( (asr & (SBIC_ASR_BSY | SBIC_ASR_INT)) == SBIC_ASR_INT )
GET_SBIC_csr(regs, csr);
+ else
+ csr = 0;
- QPRINTF((">ASR:0x%02x CSR:0x%02x <", asr, csr));
+ if ( csr ) {
- switch ( csr ) {
+ QPRINTF((">ASR:0x%02x CSR:0x%02x< ", asr, csr));
- case SBIC_CSR_S_XFERRED:
- case SBIC_CSR_DISC:
- case SBIC_CSR_DISC_1:
- {
- u_char phase;
+ switch ( csr ) {
- dev->sc_flags &= ~SBICF_SELECTED;
- GET_SBIC_cmd_phase (regs, phase);
+ case SBIC_CSR_S_XFERRED:
+ case SBIC_CSR_DISC:
+ case SBIC_CSR_DISC_1:
+ {
+ u_char phase;
- if ( phase == 0x60 ) {
- GET_SBIC_tlun (regs, dev->sc_stat[0]);
- still_busy = 0; /* done */
- } else {
+ dev->sc_flags &= ~SBICF_SELECTED;
+ GET_SBIC_cmd_phase (regs, phase);
+
+ if ( phase == 0x60 ) {
+ GET_SBIC_tlun (regs, dev->sc_stat[0]);
+ still_busy = SBIC_STATE_DONE; /* done */
+ } else {
#ifdef DEBUG
- if ( reselect_debug > 1 )
- printf("sbicicmd: handling disconnect\n");
+ if ( reselect_debug > 1 )
+ printf("sbicicmd: handling disconnect\n");
#endif
- still_busy = SBIC_STATE_DISCONNECT;
+ still_busy = SBIC_STATE_DISCONNECT;
+ }
}
- }
- break;
+ break;
- case SBIC_CSR_XFERRED | CMD_PHASE:
- case SBIC_CSR_MIS | CMD_PHASE:
- case SBIC_CSR_MIS_1 | CMD_PHASE:
- case SBIC_CSR_MIS_2 | CMD_PHASE:
- {
- if ( sbicxfout(regs, clen, cbuf) )
- still_busy = sbicabort(dev, "icmd sending cmd");
- }
- break;
+ case SBIC_CSR_XFERRED | CMD_PHASE:
+ case SBIC_CSR_MIS | CMD_PHASE:
+ case SBIC_CSR_MIS_1 | CMD_PHASE:
+ case SBIC_CSR_MIS_2 | CMD_PHASE:
+ {
+ if ( sbicxfout(regs, clen, cbuf) )
+ still_busy = sbicabort(dev, "icmd sending cmd");
+ }
+ break;
- case SBIC_CSR_XFERRED | STATUS_PHASE:
- case SBIC_CSR_MIS | STATUS_PHASE:
- case SBIC_CSR_MIS_1 | STATUS_PHASE:
- case SBIC_CSR_MIS_2 | STATUS_PHASE:
- {
- /*
- * The sbic does the status/cmd-complete reading ok,
- * so do this with its hi-level commands.
- */
+ case SBIC_CSR_XFERRED | STATUS_PHASE:
+ case SBIC_CSR_MIS | STATUS_PHASE:
+ case SBIC_CSR_MIS_1 | STATUS_PHASE:
+ case SBIC_CSR_MIS_2 | STATUS_PHASE:
+ {
+ /*
+ * The sbic does the status/cmd-complete reading ok,
+ * so do this with its hi-level commands.
+ */
#ifdef DEBUG
- if ( sbic_debug )
- printf("SBICICMD status phase (bsy=%d)\n", still_busy);
+ if ( sbic_debug )
+ printf("SBICICMD status phase (bsy=%d)\n", still_busy);
#endif
- SET_SBIC_cmd_phase(regs, 0x46);
- SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN_XFER);
- }
- break;
+ SET_SBIC_cmd_phase(regs, 0x46);
+ SET_SBIC_cmd(regs, SBIC_CMD_SEL_ATN_XFER);
+ }
+ break;
- default:
- {
- still_busy = sbicnextstate(dev, csr, asr);
+ default:
+ {
+ still_busy = sbicnextstate(dev, csr, asr);
+ }
+ break;
}
- break;
- }
- /*
- * make sure the last command was taken,
- * ie. we're not hunting after an ignored command..
- */
- GET_SBIC_asr(regs, asr);
+ /*
+ * make sure the last command was taken,
+ * ie. we're not hunting after an ignored command..
+ */
+ GET_SBIC_asr(regs, asr);
- /*
- * tapes may take a loooong time..
- */
- while (asr & SBIC_ASR_BSY ) {
+ /*
+ * tapes may take a loooong time..
+ */
+ while (asr & SBIC_ASR_BSY ) {
- if ( asr & SBIC_ASR_DBR ) {
- int i;
+ if ( asr & SBIC_ASR_DBR ) {
+ int i;
- printf("sbicicmd: Waiting while sbic is jammed, CSR:%02x,ASR:%02x\n", csr,asr);
+ printf("sbicicmd: Waiting while sbic is jammed, CSR:%02x,ASR:%02x\n", csr,asr);
#ifdef DDB
- Debugger();
+ Debugger();
#endif
- /*
- * SBIC is jammed
- * DUNNO which direction
- * Try old direction
- */
- GET_SBIC_data(regs, i);
- GET_SBIC_asr(regs, asr);
+ /*
+ * SBIC is jammed
+ * DUNNO which direction
+ * Try old direction
+ */
+ GET_SBIC_data(regs, i);
+ GET_SBIC_asr(regs, asr);
- if ( asr & SBIC_ASR_DBR ) /* Wants us to write */
- SET_SBIC_data(regs, i);
- }
+ if ( asr & SBIC_ASR_DBR ) /* Wants us to write */
+ SET_SBIC_data(regs, i);
+ }
- GET_SBIC_asr(regs, asr);
+ GET_SBIC_asr(regs, asr);
+ }
}
/*
@@ -1461,13 +1496,13 @@ sbicicmd(dev, cbuf, clen, buf, len)
printf("sbicicmd: last command ignored\n");
}
else
- if ( still_busy == 1 ) /* Bsy */
+ if ( still_busy >= SBIC_STATE_RUNNING ) /* Bsy */
SBIC_WAIT (regs, SBIC_ASR_INT, sbic_cmd_wait);
/*
* do it again
*/
- } while ( still_busy > 0 && dev->sc_stat[0] == 0xff );
+ } while ( still_busy >= SBIC_STATE_RUNNING && dev->sc_stat[0] == 0xff );
/*
* Sometimes we need to do an extra read of the CSR
@@ -1688,10 +1723,9 @@ sbicintr(dev)
if ( (asr & SBIC_ASR_INT) == 0 )
return(0);
- do {
+ GET_SBIC_csr(regs, csr);
- if ( asr & SBIC_ASR_INT )
- GET_SBIC_csr(regs, csr);
+ do {
QPRINTF(("intr[0x%x]", csr));
@@ -1699,7 +1733,15 @@ sbicintr(dev)
#if 0
WAIT_CIP(regs);
#endif
- GET_SBIC_asr(regs, asr);
+ if ( i == SBIC_STATE_RUNNING ) {
+ GET_SBIC_asr(regs, asr);
+
+ if ( asr & SBIC_ASR_LCI )
+ printf("sbicgo: LCI asr:%02x csr:%02x\n", asr, csr);
+
+ if ( asr & SBIC_ASR_INT )
+ GET_SBIC_csr(regs, csr);
+ }
} while ( i == SBIC_STATE_RUNNING && asr & (SBIC_ASR_INT|SBIC_ASR_LCI) );
@@ -1747,6 +1789,7 @@ sbicpoll(dev)
* tapes may take a loooong time..
*/
while ( asr & SBIC_ASR_BSY ) {
+ u_char z = 0;
if ( asr & SBIC_ASR_DBR ) {
printf("sbipoll: Waiting while sbic is jammed, CSR:%02x,ASR:%02x\n", csr,asr);
@@ -1758,11 +1801,11 @@ sbicpoll(dev)
* DUNNO which direction
* Try old direction
*/
- GET_SBIC_data(regs, i);
+ GET_SBIC_data(regs, z);
GET_SBIC_asr(regs, asr);
if ( asr & SBIC_ASR_DBR ) /* Wants us to write */
- SET_SBIC_data(regs, i);
+ SET_SBIC_data(regs, z);
}
GET_SBIC_asr(regs, asr);
@@ -1771,7 +1814,7 @@ sbicpoll(dev)
if ( asr & SBIC_ASR_LCI )
printf("sbicpoll: LCI asr:%02x csr:%02x\n", asr,csr);
else
- if ( i == 1 ) /* BSY */
+ if ( i == SBIC_STATE_RUNNING ) /* BSY */
SBIC_WAIT(regs, SBIC_ASR_INT, sbic_cmd_wait);
} while ( i == SBIC_STATE_RUNNING );
@@ -2039,6 +2082,12 @@ sbicmsgin(dev)
*/
SET_SBIC_syn(regs, SBIC_SYN(dev->sc_sync[dev->target].offset,
dev->sc_sync[dev->target].period));
+#ifdef DEBUG
+ if ( sync_debug )
+ printf("msgin(%d): sync reg = 0x%02x\n", dev->target,
+ SBIC_SYN(dev->sc_sync[dev->target].offset,
+ dev->sc_sync[dev->target].period));
+#endif
printf("%s: target %d now synchronous, period=%dns, offset=%d.\n",
dev->sc_dev.dv_xname, dev->target,
@@ -2089,10 +2138,10 @@ sbicmsgin(dev)
/*
* sbicnextstate()
* return:
- * 0 == done
- * 1 == working
- * 2 == disconnected
- * -1 == error
+ * SBIC_STATE_DONE == done
+ * SBIC_STATE_RUNNING == working
+ * SBIC_STATE_DISCONNECT == disconnected
+ * SBIC_STATE_ERROR == error
*/
int
sbicnextstate(dev, csr, asr)
@@ -2374,19 +2423,16 @@ sbicnextstate(dev, csr, asr)
GET_SBIC_asr(regs, asr);
if (asr & SBIC_ASR_INT)
break;
- delay(1);
+ delay(10);
}
/*
* If we didn't get an interrupt, somethink's up
*/
if ( (asr & SBIC_ASR_INT) == 0 ) {
-#ifdef DEBUG
- if ( reselect_debug )
- printf("RSLT_NI - no IFFY message? asr %x\n", asr);
-#endif
+ printf("%s: Reselect without identify? asr %x\n",
+ dev->sc_dev.dv_xname, asr);
newlun = 0; /* XXXX */
-
} else {
/*
* We got an interrupt, verify that it's a change to
@@ -2655,6 +2701,10 @@ sbictimeout(dev)
* We need to service a missed IRQ
*/
sbicintr(dev);
+ } else {
+ (void) sbicabort(dev, "timeout");
+ splx(s);
+ return;
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-01 00:01:39 +0000