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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-05-10 00:01:09 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2007-05-10 00:01:09 +0200
commit29e744d088e3555f4efbdf390f01088dd66993b6 (patch)
tree2747692efcef505872d29e0b62cb2345b0d64978 /drivers/ide/pci/piix.c
parent2d5eaa6dd744a641e75503232a01f52d0768884c (diff)
ide: add ide_tune_dma() helper
After reworking the code responsible for selecting the best DMA transfer mode it is now possible to add generic ide_tune_dma() helper. Convert some IDE PCI host drivers to use it (the ones left need more work). Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/pci/piix.c')
-rw-r--r--drivers/ide/pci/piix.c26
1 files changed, 1 insertions, 25 deletions
diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c
index 84d3938a430a..8b219dd63024 100644
--- a/drivers/ide/pci/piix.c
+++ b/drivers/ide/pci/piix.c
@@ -304,30 +304,6 @@ static int piix_tune_chipset (ide_drive_t *drive, u8 xferspeed)
}
/**
- * piix_config_drive_for_dma - configure drive for DMA
- * @drive: IDE drive to configure
- *
- * Set up a PIIX interface channel for the best available speed.
- * We prefer UDMA if it is available and then MWDMA. If DMA is
- * not available we switch to PIO and return 0.
- */
-
-static int piix_config_drive_for_dma (ide_drive_t *drive)
-{
- u8 speed = ide_max_dma_mode(drive);
-
- /*
- * If no DMA speed was available or the chipset has DMA bugs
- * then disable DMA and use PIO
- */
- if (!speed)
- return 0;
-
- (void) piix_tune_chipset(drive, speed);
- return ide_dma_enable(drive);
-}
-
-/**
* piix_config_drive_xfer_rate - set up an IDE device
* @drive: IDE drive to configure
*
@@ -339,7 +315,7 @@ static int piix_config_drive_xfer_rate (ide_drive_t *drive)
{
drive->init_speed = 0;
- if (ide_use_dma(drive) && piix_config_drive_for_dma(drive))
+ if (ide_tune_dma(drive))
return 0;
if (ide_use_fast_pio(drive))