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Subject[PATCH v2 74/71] ncr5380: Enable PDMA for NCR53C400A
Date
Add I/O register mapping for NCR53C400A and enable PDMA mode to
improve performance and fix non-working IRQ.

Tested with HP C2502 (and user-space enabler).

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
---
drivers/scsi/g_NCR5380.c | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/g_NCR5380.c b/drivers/scsi/g_NCR5380.c
index 86740fd..099fdac 100644
--- a/drivers/scsi/g_NCR5380.c
+++ b/drivers/scsi/g_NCR5380.c
@@ -324,7 +324,7 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
#endif
break;
case BOARD_NCR53C400A:
- flags = FLAG_NO_PSEUDO_DMA;
+ flags = FLAG_NO_DMA_FIXUP;
ports = ncr_53c400a_ports;
break;
case BOARD_DTC3181E:
@@ -406,11 +406,18 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
* On NCR53C400 boards, NCR5380 registers are mapped 8 past
* the base address.
*/
- if (overrides[current_override].board == BOARD_NCR53C400) {
+ switch (overrides[current_override].board) {
+ case BOARD_NCR53C400:
instance->io_port += 8;
hostdata->c400_ctl_status = 0;
hostdata->c400_blk_cnt = 1;
hostdata->c400_host_buf = 4;
+ break;
+ case BOARD_NCR53C400A:
+ hostdata->c400_ctl_status = 9;
+ hostdata->c400_blk_cnt = 10;
+ hostdata->c400_host_buf = 8;
+ break;
}
#else
instance->base = overrides[current_override].NCR5380_map_name;
@@ -425,7 +432,8 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt)
if (NCR5380_init(instance, flags))
goto out_unregister;

- if (overrides[current_override].board == BOARD_NCR53C400)
+ if (overrides[current_override].board == BOARD_NCR53C400 ||
+ overrides[current_override].board == BOARD_NCR53C400A)
NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);

NCR5380_maybe_reset_bus(instance);
--
Ondrej Zary


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