ncr5380: Disable the DMA errata workaround flag by default
The only chip that needs the workarounds enabled is an early NMOS
device. That means that the common case is to disable them.
Unfortunately the sense of the flag is such that it has to be set
for the common case.
Rename the flag so that zero can be used to mean "no errata workarounds
needed". This simplifies the code.
Signed-off-by: Finn Thain <fthain@telegraphics.com.au>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Ondrej Zary <linux@rainbow-software.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
diff --git a/drivers/scsi/NCR5380.c b/drivers/scsi/NCR5380.c
index 826b63d1..69c73c3 100644
--- a/drivers/scsi/NCR5380.c
+++ b/drivers/scsi/NCR5380.c
@@ -457,7 +457,7 @@
instance->base, instance->irq,
instance->can_queue, instance->cmd_per_lun,
instance->sg_tablesize, instance->this_id,
- hostdata->flags & FLAG_NO_DMA_FIXUP ? "NO_DMA_FIXUP " : "",
+ hostdata->flags & FLAG_DMA_FIXUP ? "DMA_FIXUP " : "",
hostdata->flags & FLAG_NO_PSEUDO_DMA ? "NO_PSEUDO_DMA " : "",
hostdata->flags & FLAG_TOSHIBA_DELAY ? "TOSHIBA_DELAY " : "",
#ifdef AUTOPROBE_IRQ
@@ -1480,11 +1480,11 @@
* before the setting of DMA mode to after transfer of the last byte.
*/
- if (hostdata->flags & FLAG_NO_DMA_FIXUP)
+ if (hostdata->flags & FLAG_DMA_FIXUP)
+ NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY);
+ else
NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY |
MR_ENABLE_EOP_INTR);
- else
- NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_MONITOR_BSY);
dprintk(NDEBUG_DMA, "scsi%d : mode reg = 0x%X\n", instance->host_no, NCR5380_read(MODE_REG));
@@ -1540,8 +1540,8 @@
if (p & SR_IO) {
foo = NCR5380_pread(instance, d,
- hostdata->flags & FLAG_NO_DMA_FIXUP ? c : c - 1);
- if (!foo && !(hostdata->flags & FLAG_NO_DMA_FIXUP)) {
+ hostdata->flags & FLAG_DMA_FIXUP ? c - 1 : c);
+ if (!foo && (hostdata->flags & FLAG_DMA_FIXUP)) {
/*
* The workaround was to transfer fewer bytes than we
* intended to with the pseudo-DMA read function, wait for
@@ -1571,7 +1571,7 @@
}
} else {
foo = NCR5380_pwrite(instance, d, c);
- if (!foo && !(hostdata->flags & FLAG_NO_DMA_FIXUP)) {
+ if (!foo && (hostdata->flags & FLAG_DMA_FIXUP)) {
/*
* Wait for the last byte to be sent. If REQ is being asserted for
* the byte we're interested, we'll ACK it and it will go false.