[PATCH] ata_piix: add a couple of flags

Add PIIX_FLAG_IGN_PRESENT and SCR flags.  Thi patch doesn't cause any
functional change.  To be used by later init/scr updates.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/scsi/ata_piix.c

@@ -101,6 +101,8 @@ enum {
 	ICH5_PCS		= 0x92,	/* port control and status */
 	PIIX_SCC		= 0x0A, /* sub-class code register */
 
+	PIIX_FLAG_IGN_PRESENT	= (1 << 25), /* ignore PCS present bits */
+	PIIX_FLAG_SCR		= (1 << 26), /* SCR available */
 	PIIX_FLAG_AHCI		= (1 << 27), /* AHCI possible */
 	PIIX_FLAG_CHECKINTR	= (1 << 28), /* make sure PCI INTx enabled */
 	PIIX_FLAG_COMBINED	= (1 << 29), /* combined mode possible */
@@ -314,7 +316,7 @@ static struct ata_port_info piix_port_info[] = {
 	{
 		.sht		= &piix_sht,
 		.host_flags	= ATA_FLAG_SATA | PIIX_FLAG_COMBINED |
-				  PIIX_FLAG_CHECKINTR,
+				  PIIX_FLAG_CHECKINTR | PIIX_FLAG_IGN_PRESENT,
 		.pio_mask	= 0x1f,	/* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
 		.udma_mask	= 0x7f,	/* udma0-6 */
@@ -325,7 +327,8 @@ static struct ata_port_info piix_port_info[] = {
 	{
 		.sht		= &piix_sht,
 		.host_flags	= ATA_FLAG_SATA | PIIX_FLAG_COMBINED_ICH6 |
-				  PIIX_FLAG_CHECKINTR | ATA_FLAG_SLAVE_POSS,
+				  PIIX_FLAG_CHECKINTR | ATA_FLAG_SLAVE_POSS |
+				  PIIX_FLAG_SCR,
 		.pio_mask	= 0x1f,	/* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
 		.udma_mask	= 0x7f,	/* udma0-6 */
@@ -337,7 +340,7 @@ static struct ata_port_info piix_port_info[] = {
 		.sht		= &piix_sht,
 		.host_flags	= ATA_FLAG_SATA | PIIX_FLAG_COMBINED_ICH6 |
 				  PIIX_FLAG_CHECKINTR | ATA_FLAG_SLAVE_POSS |
-				  PIIX_FLAG_AHCI,
+				  PIIX_FLAG_SCR | PIIX_FLAG_AHCI,
 		.pio_mask	= 0x1f,	/* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
 		.udma_mask	= 0x7f,	/* udma0-6 */
@@ -349,7 +352,7 @@ static struct ata_port_info piix_port_info[] = {
 		.sht		= &piix_sht,
 		.host_flags	= ATA_FLAG_SATA | PIIX_FLAG_COMBINED_ICH6 |
 				  PIIX_FLAG_CHECKINTR | ATA_FLAG_SLAVE_POSS |
-				  PIIX_FLAG_AHCI,
+				  PIIX_FLAG_SCR | PIIX_FLAG_AHCI,
 		.pio_mask	= 0x1f,	/* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma0-2 */
 		.udma_mask	= 0x7f,	/* udma0-6 */