pata_hpt{37x|3x2n}: unify mode programming

As these drivers' set_piomode() and set_dmamode() methods are almost
identical, factor out the common hpt{37x|3x2n}_set_mode() function
to be called by both of them, the same as in 'pata_hpt366' driver.

This results in ~5% decrease in the 'pata_hpt37x' driver binary
size and in ~4% decrease in the 'pata_hpt3x2n' driver binary size
(as measured on x86-32).

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 31 insertions, 38 deletions

diff --git a/drivers/ata/pata_hpt3x2n.c b/drivers/ata/pata_hpt3x2n.c
index 269b5dbe51bb..b131c8f824d7 100644
--- a/drivers/ata/pata_hpt3x2n.c
+++ b/drivers/ata/pata_hpt3x2n.c
@@ -25,7 +25,7 @@
 #include <linux/libata.h>
 
 #define DRV_NAME	"pata_hpt3x2n"
-#define DRV_VERSION	"0.3.9"
+#define DRV_VERSION	"0.3.10"
 
 enum {
 	HPT_PCI_FAST	=	(1 << 31),
@@ -161,20 +161,12 @@ static int hpt3x2n_pre_reset(struct ata_link *link, unsigned long deadline)
 	return ata_sff_prereset(link, deadline);
 }
 
-/**
- *	hpt3x2n_set_piomode		-	PIO setup
- *	@ap: ATA interface
- *	@adev: device on the interface
- *
- *	Perform PIO mode setup.
- */
-
-static void hpt3x2n_set_piomode(struct ata_port *ap, struct ata_device *adev)
+static void hpt3x2n_set_mode(struct ata_port *ap, struct ata_device *adev,
+			     u8 mode)
 {
 	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
 	u32 addr1, addr2;
-	u32 reg;
-	u32 mode;
+	u32 reg, timing, mask;
 	u8 fast;
 
 	addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
@@ -185,11 +177,32 @@ static void hpt3x2n_set_piomode(struct ata_port *ap, struct ata_device *adev)
 	fast &= ~0x07;
 	pci_write_config_byte(pdev, addr2, fast);
 
+	/* Determine timing mask and find matching mode entry */
+	if (mode < XFER_MW_DMA_0)
+		mask = 0xcfc3ffff;
+	else if (mode < XFER_UDMA_0)
+		mask = 0x31c001ff;
+	else
+		mask = 0x303c0000;
+
+	timing = hpt3x2n_find_mode(ap, mode);
+
 	pci_read_config_dword(pdev, addr1, &reg);
-	mode = hpt3x2n_find_mode(ap, adev->pio_mode);
-	mode &= 0xCFC3FFFF;	/* Leave DMA bits alone */
-	reg &= ~0xCFC3FFFF;	/* Strip timing bits */
-	pci_write_config_dword(pdev, addr1, reg | mode);
+	reg = (reg & ~mask) | (timing & mask);
+	pci_write_config_dword(pdev, addr1, reg);
+}
+
+/**
+ *	hpt3x2n_set_piomode		-	PIO setup
+ *	@ap: ATA interface
+ *	@adev: device on the interface
+ *
+ *	Perform PIO mode setup.
+ */
+
+static void hpt3x2n_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+	hpt3x2n_set_mode(ap, adev, adev->pio_mode);
 }
 
 /**
@@ -197,32 +210,12 @@ static void hpt3x2n_set_piomode(struct ata_port *ap, struct ata_device *adev)
  *	@ap: ATA interface
  *	@adev: Device being configured
  *
- *	Set up the channel for MWDMA or UDMA modes. Much the same as with
- *	PIO, load the mode number and then set MWDMA or UDMA flag.
+ *	Set up the channel for MWDMA or UDMA modes.
  */
 
 static void hpt3x2n_set_dmamode(struct ata_port *ap, struct ata_device *adev)
 {
-	struct pci_dev *pdev = to_pci_dev(ap->host->dev);
-	u32 addr1, addr2;
-	u32 reg, mode, mask;
-	u8 fast;
-
-	addr1 = 0x40 + 4 * (adev->devno + 2 * ap->port_no);
-	addr2 = 0x51 + 4 * ap->port_no;
-
-	/* Fast interrupt prediction disable, hold off interrupt disable */
-	pci_read_config_byte(pdev, addr2, &fast);
-	fast &= ~0x07;
-	pci_write_config_byte(pdev, addr2, fast);
-
-	mask = adev->dma_mode < XFER_UDMA_0 ? 0x31C001FF : 0x303C0000;
-
-	pci_read_config_dword(pdev, addr1, &reg);
-	mode = hpt3x2n_find_mode(ap, adev->dma_mode);
-	mode &= mask;
-	reg &= ~mask;
-	pci_write_config_dword(pdev, addr1, reg | mode);
+	hpt3x2n_set_mode(ap, adev, adev->dma_mode);
 }
 
 /**