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reset scsi bus at attach time

This commit is contained in:
deraadt 1994-11-05 09:35:54 +00:00
parent 880176b15b
commit 4cd7c0f34e
1 changed files with 21 additions and 13 deletions
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34
sys/arch/sparc/dev/esp.c
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@ -30,7 +30,7 @@
*/
/*
* $Id: esp.c,v 1.10 1994/10/15 08:57:27 deraadt Exp $
* $Id: esp.c,v 1.11 1994/11/05 09:35:54 deraadt Exp $
*
* Based on aic6360 by Jarle Greipsland
*
@ -74,7 +74,7 @@ u_char espgetbyte __P((struct esp_softc *));
void espselect __P((struct esp_softc *, u_char, u_char, caddr_t, u_char));
void esp_scsi_reset __P((struct esp_softc *));
void esp_reset __P((struct esp_softc *));
void esp_init __P((struct esp_softc *));
void esp_init __P((struct esp_softc *, int));
int esp_scsi_cmd __P((struct scsi_xfer *));
int esp_poll __P((struct esp_softc *, struct ecb *));
int espphase __P((struct esp_softc *));
@ -366,7 +366,7 @@ espattach(parent, self, aux)
}
sc->sc_state = 0;
esp_init(sc);
esp_init(sc, 1);
printf(" %dMhz, target %d\n", sc->sc_freq, sc->sc_id);
@ -474,8 +474,9 @@ esp_scsi_reset(sc)
* Initialize esp state machine
*/
void
esp_init(sc)
esp_init(sc, doreset)
struct esp_softc *sc;
int doreset;
{
struct ecb *ecb;
int r;
@ -485,6 +486,13 @@ esp_init(sc)
*/
esp_reset(sc);
if (doreset) {
ESPCMD(sc, ESPCMD_RSTSCSI);
DELAY(50);
/* cheat: we don't want the state machine to reset again.. */
esp_reset(sc);
}
if (sc->sc_state == 0) { /* First time through */
TAILQ_INIT(&sc->ready_list);
TAILQ_INIT(&sc->nexus_list);
@ -515,6 +523,7 @@ esp_init(sc)
sc->sc_phase = sc->sc_prevphase = INVALID_PHASE;
for (r = 0; r < 8; r++) {
struct esp_tinfo *tp = &sc->sc_tinfo[r];
tp->flags = DO_NEGOTIATE | NEED_TO_RESET;
tp->period = sc->sc_minsync;
tp->offset = ESP_SYNC_REQ_ACK_OFS;
@ -1222,8 +1231,7 @@ espintr(sc)
* This is a heuristic. It is 2 when at 20Mhz, 2 at 25Mhz and 1
* at 40Mhz. This needs testing.
*/
#define FOREVER
for (loop = 0; FOREVER;loop++, DELAY(50/sc->sc_freq)) {
for (loop = 0; 1;loop++, DELAY(50/sc->sc_freq)) {
/* a feeling of deja-vu */
if (!DMA_ISINTR(sc->sc_dma) && loop)
return 1;
@ -1270,8 +1278,8 @@ espintr(sc)
*/
#define ESPINTR_ERR (ESPINTR_SBR|ESPINTR_ILL)
if (sc->sc_espintr & ESPINTR_ERR
|| sc->sc_espstat & ESPSTAT_GE) {
if (sc->sc_espintr & ESPINTR_ERR ||
sc->sc_espstat & ESPSTAT_GE) {
/* SCSI Reset */
if (sc->sc_espintr & ESPINTR_SBR) {
if (esp[ESP_FFLAG] & ESPFIFO_FF) {
@ -1280,7 +1288,7 @@ espintr(sc)
}
printf("%s: SCSI bus reset\n",
sc->sc_dev.dv_xname);
esp_init(sc); /* Restart everything */
esp_init(sc, 0); /* Restart everything */
return 1;
}
@ -1382,7 +1390,7 @@ espintr(sc)
if (sc->sc_phase != MESSAGE_IN_PHASE) {
printf("%s: target didn't identify\n",
sc->sc_dev.dv_xname);
esp_init(sc);
esp_init(sc, 1);
return 1;
}
esp_msgin(sc);
@ -1390,7 +1398,7 @@ espintr(sc)
/* IDENTIFY fail?! */
printf("%s: identify failed\n",
sc->sc_dev.dv_xname);
esp_init(sc);
esp_init(sc, 1);
return 1;
}
break;
@ -1418,7 +1426,7 @@ espintr(sc)
*/
printf("%s: target didn't identify\n",
sc->sc_dev.dv_xname);
esp_init(sc);
esp_init(sc, 1);
return 1;
}
esp_msgin(sc); /* Handle identify message */
@ -1426,7 +1434,7 @@ espintr(sc)
/* IDENTIFY fail?! */
printf("%s: identify failed\n",
sc->sc_dev.dv_xname);
esp_init(sc);
esp_init(sc, 1);
return 1;
}
break;