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pata_via: clear UDMA transfer mode bit for PIO and MWDMA

Browse source 
Fix register naming while at it.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2009-12-03 20:32:13 +01:00 committed by Jeff Garzik
parent 750c7136ea
commit c4d8a20022
1 changed files with 13 additions and 6 deletions
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19
drivers/ata/pata_via.c
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@ -303,14 +303,21 @@ static void via_do_set_mode(struct ata_port *ap, struct ata_device *adev, int mo
}
/* Set UDMA unless device is not UDMA capable */
if (udma_type && t.udma) {
u8 cable80_status;
if (udma_type) {
u8 udma_etc;
/* Get 80-wire cable detection bit */
pci_read_config_byte(pdev, 0x50 + offset, &cable80_status);
cable80_status &= 0x10;
pci_read_config_byte(pdev, 0x50 + offset, &udma_etc);
pci_write_config_byte(pdev, 0x50 + offset, ut | cable80_status);
/* clear transfer mode bit */
udma_etc &= ~0x20;
if (t.udma) {
/* preserve 80-wire cable detection bit */
udma_etc &= 0x10;
udma_etc |= ut;
}
pci_write_config_byte(pdev, 0x50 + offset, udma_etc);
}
}