diff options
| -rw-r--r-- | drivers/ata/pata_cmd64x.c | 37 |
1 files changed, 26 insertions, 11 deletions
diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c index e34b632487d..922902a1b4a 100644 --- a/drivers/ata/pata_cmd64x.c +++ b/drivers/ata/pata_cmd64x.c @@ -31,7 +31,7 @@ #include <linux/libata.h> #define DRV_NAME "pata_cmd64x" -#define DRV_VERSION "0.2.4" +#define DRV_VERSION "0.2.5" /* * CMD64x specific registers definition. @@ -88,14 +88,15 @@ static int cmd648_cable_detect(struct ata_port *ap) } /** - * 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 @@ static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev) 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 @@ static void cmd64x_set_piomode(struct ata_port *ap, struct ata_device *adev) } /** + * 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 void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev) 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 @@ static void cmd64x_set_dmamode(struct ata_port *ap, struct ata_device *adev) 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; |