Set the MWDMA timing by updating the correct registers. Split the PIO
path as this is mostly shared code. Wants testing.
Signed-off-by: Alan Cox <[EMAIL PROTECTED]>
diff -u --new-file --recursive --exclude-from /usr/src/exclude
linux.vanilla-2.6.23rc1-mm1/drivers/ata/pata_cmd64x.c
linux-2.6.23rc1-mm1/drivers/ata/pata_cmd64x.c
--- linux.vanilla-2.6.23rc1-mm1/drivers/ata/pata_cmd64x.c 2007-07-26
15:01:52.000000000 +0100
+++ linux-2.6.23rc1-mm1/drivers/ata/pata_cmd64x.c 2007-08-08
11:52:23.000000000 +0100
@@ -31,7 +31,7 @@
#include <linux/libata.h>
#define DRV_NAME "pata_cmd64x"
-#define DRV_VERSION "0.2.3"
+#define DRV_VERSION "0.2.4"
/*
* CMD64x specific registers definition.
@@ -88,14 +88,15 @@
}
/**
- * cmd64x_set_piomode - set initial PIO mode data
+ * cmd64x_set_piomode - set PIO and MWDMA timing
* @ap: ATA interface
* @adev: ATA device
+ * @mode: mode
*
- * Called to do the PIO mode setup.
+ * Called to do the PIO and MWDMA mode setup.
*/
-static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
+static void cmd64x_set_timing(struct ata_port *ap, struct ata_device *adev, u8
mode)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
struct ata_timing t;
@@ -117,8 +118,9 @@
int arttim = arttim_port[ap->port_no][adev->devno];
int drwtim = drwtim_port[ap->port_no][adev->devno];
-
- if (ata_timing_compute(adev, adev->pio_mode, &t, T, 0) < 0) {
+ /* ata_timing_compute is smart and will produce timings for MWDMA
+ that don't violate the drives PIO capabilities. */
+ if (ata_timing_compute(adev, mode, &t, T, 0) < 0) {
printk(KERN_ERR DRV_NAME ": mode computation failed.\n");
return;
}
@@ -168,6 +170,20 @@
}
/**
+ * cmd64x_set_piomode - set initial PIO mode data
+ * @ap: ATA interface
+ * @adev: ATA device
+ *
+ * Used when configuring the devices ot set the PIO timings. All the
+ * actual work is done by the PIO/MWDMA setting helper
+ */
+
+static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+ cmd64x_set_timing(ap, adev, adev->pio_mode);
+}
+
+/**
* cmd64x_set_dmamode - set initial DMA mode data
* @ap: ATA interface
* @adev: ATA device
@@ -180,9 +196,6 @@
static const u8 udma_data[] = {
0x30, 0x20, 0x10, 0x20, 0x10, 0x00
};
- static const u8 mwdma_data[] = {
- 0x30, 0x20, 0x10
- };
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 regU, regD;
@@ -208,8 +221,10 @@
regU |= 1 << adev->devno; /* UDMA on */
if (adev->dma_mode > 2) /* 15nS timing */
regU |= 4 << adev->devno;
- } else
- regD |= mwdma_data[adev->dma_mode - XFER_MW_DMA_0] << shift;
+ } else {
+ regU &= ~ (1 << adev->devno); /* UDMA off */
+ cmd64x_set_timing(ap, adev, adev->dma_mode);
+ }
regD |= 0x20 << adev->devno;
-
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