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libata: reimplement ata_acpi_cbl_80wire() using ata_acpi_gtm_xfermask()

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Reimplement ata_acpi_cbl_80wire() using ata_acpi_gtm_xfermask() and
while at it relocate the function below ata_acpi_gtm_xfermask().

New ata_acpi_cbl_80wire() implementation takes @gtm, in both pata_via
and pata_amd, use the initial GTM value.  Both are trying to peek
initial BIOS configuration, so using initial caching value makes
sense.  This fixes ACPI part of cable detection in pata_amd which
previously always returned 0 because configuring PIO0 during reset
clears DMA configuration.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Tejun Heo
2007-12-18 16:33:06 +09:00
committed by Jeff Garzik
parent a0f79b929a
commit 021ee9a6da
4 changed files with 26 additions and 29 deletions
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39
drivers/ata/libata-acpi.c
View File

@@ -490,38 +490,29 @@ EXPORT_SYMBOL_GPL(ata_acpi_gtm_xfermask);
/**
* ata_acpi_cbl_80wire - Check for 80 wire cable
* @ap: Port to check
* @gtm: GTM data to use
*
* Return 1 if the ACPI mode data for this port indicates the BIOS selected
* an 80wire mode.
* Return 1 if the @gtm indicates the BIOS selected an 80wire mode.
*/
int ata_acpi_cbl_80wire(struct ata_port *ap)
int ata_acpi_cbl_80wire(struct ata_port *ap, const struct ata_acpi_gtm *gtm)
{
const struct ata_acpi_gtm *gtm = ata_acpi_init_gtm(ap);
int valid = 0;
struct ata_device *dev;
if (!gtm)
return 0;
ata_link_for_each_dev(dev, &ap->link) {
unsigned long xfer_mask, udma_mask;
/* Split timing, DMA enabled */
if ((gtm->flags & 0x11) == 0x11 && gtm->drive[0].dma < 55)
valid |= 1;
if ((gtm->flags & 0x14) == 0x14 && gtm->drive[1].dma < 55)
valid |= 2;
/* Shared timing, DMA enabled */
if ((gtm->flags & 0x11) == 0x01 && gtm->drive[0].dma < 55)
valid |= 1;
if ((gtm->flags & 0x14) == 0x04 && gtm->drive[0].dma < 55)
valid |= 2;
if (!ata_dev_enabled(dev))
continue;
xfer_mask = ata_acpi_gtm_xfermask(dev, gtm);
ata_unpack_xfermask(xfer_mask, NULL, NULL, &udma_mask);
if (udma_mask & ~ATA_UDMA_MASK_40C)
return 1;
}
/* Drive check */
if ((valid & 1) && ata_dev_enabled(&ap->link.device[0]))
return 1;
if ((valid & 2) && ata_dev_enabled(&ap->link.device[1]))
return 1;
return 0;
}
EXPORT_SYMBOL_GPL(ata_acpi_cbl_80wire);
static void ata_acpi_gtf_to_tf(struct ata_device *dev,