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Commit cecf3bee authored by Ondrej Zary's avatar Ondrej Zary Committed by Martin K. Petersen
Browse files

ncr5380: Enable PDMA for NCR53C400A 



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: default avatarOndrej Zary <linux@rainbow-software.org>
Signed-off-by: default avatarFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: default avatarHannes Reinecke <hare@suse.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 12150797

drivers/scsi/g_NCR5380.c

+19 −4
Original line number Original line Diff line number Diff line
@@ -323,7 +323,7 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt) 
#endif

#endif

			break;

			break;

		case BOARD_NCR53C400A:

		case BOARD_NCR53C400A:

			flags = FLAG_NO_PSEUDO_DMA;

			flags = FLAG_NO_DMA_FIXUP;

			ports = ncr_53c400a_ports;

			ports = ncr_53c400a_ports;

			break;

			break;

		case BOARD_DTC3181E:

		case BOARD_DTC3181E:
@@ -405,27 +405,42 @@ static int __init generic_NCR5380_detect(struct scsi_host_template *tpnt) 
		 * On NCR53C400 boards, NCR5380 registers are mapped 8 past

		 * On NCR53C400 boards, NCR5380 registers are mapped 8 past

		 * the base address.

		 * the base address.

		 */

		 */

		if (overrides[current_override].board == BOARD_NCR53C400) {

		switch (overrides[current_override].board) {

		case BOARD_NCR53C400:

			instance->io_port += 8;

			instance->io_port += 8;

			hostdata->c400_ctl_status = 0;

			hostdata->c400_ctl_status = 0;

			hostdata->c400_blk_cnt = 1;

			hostdata->c400_blk_cnt = 1;

			hostdata->c400_host_buf = 4;

			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

#else

		instance->base = overrides[current_override].NCR5380_map_name;

		instance->base = overrides[current_override].NCR5380_map_name;

		hostdata->iomem = iomem;

		hostdata->iomem = iomem;

		if (overrides[current_override].board == BOARD_NCR53C400) {

		switch (overrides[current_override].board) {

		case BOARD_NCR53C400:

			hostdata->c400_ctl_status = 0x100;

			hostdata->c400_ctl_status = 0x100;

			hostdata->c400_blk_cnt = 0x101;

			hostdata->c400_blk_cnt = 0x101;

			hostdata->c400_host_buf = 0x104;

			hostdata->c400_host_buf = 0x104;

			break;

		case BOARD_NCR53C400A:

			pr_err(DRV_MODULE_NAME ": unknown register offsets\n");

			goto out_unregister;

		}

		}

#endif

#endif





		if (NCR5380_init(instance, flags))

		if (NCR5380_init(instance, flags))

			goto out_unregister;

			goto out_unregister;





		if (overrides[current_override].board == BOARD_NCR53C400)

		switch (overrides[current_override].board) {

		case BOARD_NCR53C400:

		case BOARD_NCR53C400A:

			NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);

			NCR5380_write(hostdata->c400_ctl_status, CSR_BASE);

		}





		NCR5380_maybe_reset_bus(instance);

		NCR5380_maybe_reset_bus(instance);