dect
/
linux-2.6
Archived
13
0
Fork 0
Code Releases Activity

pata_it8213: Cable detect 

Another not-quite PIIX, another cable type conversion

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
This commit is contained in:
Alan Cox 2007-03-07 16:46:20 +00:00 committed by Jeff Garzik
parent a0fcdc0259
commit 5816fbbf22
1 changed files with 23 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
drivers/ata/pata_it8213.c
View File

@ -25,8 +25,8 @@
* it8213_pre_reset - check for 40/80 pin
* @ap: Port
*
* Perform cable detection for the 8213 ATA interface. This is
* different to the PIIX arrangement
* Filter out ports by the enable bits before doing the normal reset
* and probe.
*/
static int it8213_pre_reset(struct ata_port *ap)
@ -34,23 +34,14 @@ static int it8213_pre_reset(struct ata_port *ap)
static const struct pci_bits it8213_enable_bits[] = {
{ 0x41U, 1U, 0x80UL, 0x80UL }, /* port 0 */
};
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 tmp;
if (!pci_test_config_bits(pdev, &it8213_enable_bits[ap->port_no]))
return -ENOENT;
pci_read_config_byte(pdev, 0x42, &tmp);
if (tmp & 2) /* The initial docs are incorrect */
ap->cbl = ATA_CBL_PATA40;
else
ap->cbl = ATA_CBL_PATA80;
return ata_std_prereset(ap);
}
/**
* it8213_probe_reset - Probe specified port on PATA host controller
* it8213_error_handler - Probe specified port on PATA host controller
* @ap: Port to probe
*
* LOCKING:
@ -62,10 +53,28 @@ static void it8213_error_handler(struct ata_port *ap)
ata_bmdma_drive_eh(ap, it8213_pre_reset, ata_std_softreset, NULL, ata_std_postreset);
}
/**
* it8213_cable_detect - check for 40/80 pin
* @ap: Port
*
* Perform cable detection for the 8213 ATA interface. This is
* different to the PIIX arrangement
*/
static int it8213_cable_detect(struct ata_port *ap)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 tmp;
pci_read_config_byte(pdev, 0x42, &tmp);
if (tmp & 2) /* The initial docs are incorrect */
return ATA_CBL_PATA40;
return ATA_CBL_PATA80;
}
/**
* it8213_set_piomode - Initialize host controller PATA PIO timings
* @ap: Port whose timings we are configuring
* @adev: um
* @adev: Device whose timings we are configuring
*
* Set PIO mode for device, in host controller PCI config space.
*
@ -268,6 +277,7 @@ static const struct ata_port_operations it8213_ops = {
.thaw = ata_bmdma_thaw,
.error_handler = it8213_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = it8213_cable_detect,
.bmdma_setup = ata_bmdma_setup,
.bmdma_start = ata_bmdma_start,