atari_NCR5380: Remove RESET_BOOT, CONFIG_ATARI_SCSI_TOSHIBA_DELAY and CONFIG_ATARI_SCSI_RESET_BOOT

The atari_NCR5380.c core driver now takes care of bus reset upon driver
initialization if required (same as NCR5380.c). Move the Toshiba CD-ROM
support into the core driver, enabled with a host flag, so that all
NCR5380 drivers can make use of it.

Drop the RESET_BOOT macros and the ATARI_SCSI_RESET_BOOT and
ATARI_SCSI_TOSHIBA_DELAY Kconfig symbols, which are now redundant.

Remove the atari_scsi_reset_boot(), mac_scsi_reset_boot() and
sun3_scsi_reset_boot() routines. None of this duplicated code is needed
now that all drivers can use NCR5380_maybe_reset_bus().

This brings atari_scsi, mac_scsi and sun3_scsi into line with all of the
other NCR5380 drivers.

The bus reset may raise an interrupt. That would be new behaviour for
atari_scsi only when CONFIG_ATARI_SCSI_RESET_BOOT=n. The ST DMA interrupt
is not assigned to atari_scsi at this stage, so
CONFIG_ATARI_SCSI_RESET_BOOT=y may well be problematic already.
Regardless, do_reset() now raises and clears the interrupt within
local_irq_save/restore which should avoid problems.

Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c
index 391ee8d..7ccf2e3 100644
--- a/drivers/scsi/NCR5380.c
+++ b/drivers/scsi/NCR5380.c
@@ -618,7 +618,7 @@
 	         "base 0x%lx, irq %d, "
 	         "can_queue %d, cmd_per_lun %d, "
 	         "sg_tablesize %d, this_id %d, "
-	         "flags { %s%s%s}, "
+	         "flags { %s%s%s%s}, "
 #if defined(USLEEP_POLL) && defined(USLEEP_WAITLONG)
 		 "USLEEP_POLL %lu, USLEEP_WAITLONG %lu, "
 #endif
@@ -630,6 +630,7 @@
 	         hostdata->flags & FLAG_NCR53C400     ? "NCR53C400 "     : "",
 	         hostdata->flags & FLAG_DTC3181E      ? "DTC3181E "      : "",
 	         hostdata->flags & FLAG_NO_PSEUDO_DMA ? "NO_PSEUDO_DMA " : "",
+	         hostdata->flags & FLAG_TOSHIBA_DELAY ? "TOSHIBA_DELAY "  : "",
 #if defined(USLEEP_POLL) && defined(USLEEP_WAITLONG)
 	         USLEEP_POLL, USLEEP_WAITLONG,
 #endif
@@ -831,6 +832,7 @@
 
 static int NCR5380_maybe_reset_bus(struct Scsi_Host *instance)
 {
+	struct NCR5380_hostdata *hostdata = shost_priv(instance);
 	int pass;
 
 	for (pass = 1; (NCR5380_read(STATUS_REG) & SR_BSY) && pass <= 6; ++pass) {
@@ -849,6 +851,14 @@
 		case 4:
 			shost_printk(KERN_ERR, instance, "bus busy, attempting reset\n");
 			do_reset(instance);
+			/* Wait after a reset; the SCSI standard calls for
+			 * 250ms, we wait 500ms to be on the safe side.
+			 * But some Toshiba CD-ROMs need ten times that.
+			 */
+			if (hostdata->flags & FLAG_TOSHIBA_DELAY)
+				msleep(2500);
+			else
+				msleep(500);
 			break;
 		case 6:
 			shost_printk(KERN_ERR, instance, "bus locked solid\n");
@@ -1253,7 +1263,10 @@
 	 * a minimum so we'll udelay ceil(1.2)
 	 */
 
-	udelay(2);
+	if (hostdata->flags & FLAG_TOSHIBA_DELAY)
+		udelay(15);
+	else
+		udelay(2);
 
 	dprintk(NDEBUG_ARBITRATION, "scsi%d : won arbitration\n", instance->host_no);