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libata cmd64x: whack into a shape that looks like the documentation

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Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Alan 2007-01-24 11:49:03 +00:00 committed by Jeff Garzik
parent a21b069626
commit 6a40da02be
1 changed files with 16 additions and 7 deletions
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23
drivers/ata/pata_cmd64x.c
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@ -197,7 +197,7 @@ static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev)
static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
{
static const u8 udma_data[] = {
0x31, 0x21, 0x11, 0x25, 0x15, 0x05
0x30, 0x20, 0x10, 0x20, 0x10, 0x00
};
static const u8 mwdma_data[] = {
0x30, 0x20, 0x10
@ -213,12 +213,21 @@ static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev)
pci_read_config_byte(pdev, pciD, &regD);
pci_read_config_byte(pdev, pciU, &regU);
regD &= ~(0x20 << shift);
regU &= ~(0x35 << shift);
/* DMA bits off */
regD &= ~(0x20 << adev->devno);
/* DMA control bits */
regU &= ~(0x30 << shift);
/* DMA timing bits */
regU &= ~(0x05 << adev->devno);
if (adev->dma_mode >= XFER_UDMA_0)
if (adev->dma_mode >= XFER_UDMA_0) {
/* Merge thge timing value */
regU |= udma_data[adev->dma_mode - XFER_UDMA_0] << shift;
else
/* Merge the control bits */
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;
regD |= 0x20 << adev->devno;
@ -239,8 +248,8 @@ static void cmd648_bmdma_stop(struct ata_queued_cmd *qc)
struct ata_port *ap = qc->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 dma_intr;
int dma_reg = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
int dma_mask = ap->port_no ? ARTTIM2 : CFR;
int dma_mask = ap->port_no ? ARTTIM23_INTR_CH1 : CFR_INTR_CH0;
int dma_reg = ap->port_no ? ARTTIM2 : CFR;
ata_bmdma_stop(qc);