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pata_hpt366: fix cable detection,

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pata_hpt366 is strange in that its two channels occupy two PCI
functions and both are primary channels and bit1 of PCI configuration
register 0x5A indicates cable for both channels.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
This commit is contained in:
Tejun Heo 2008-12-09 17:13:19 +09:00 committed by Jeff Garzik
parent d10d491f84
commit bab5b32a53
1 changed files with 6 additions and 2 deletions
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8
drivers/ata/pata_hpt366.c
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@ -211,11 +211,15 @@ static u32 hpt36x_find_mode(struct ata_port *ap, int speed)
static int hpt36x_cable_detect(struct ata_port *ap)
{
u8 ata66;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
u8 ata66;
/*
* Each channel of pata_hpt366 occupies separate PCI function
* as the primary channel and bit1 indicates the cable type.
*/
pci_read_config_byte(pdev, 0x5A, &ata66);
if (ata66 & (1 << ap->port_no))
if (ata66 & 2)
return ATA_CBL_PATA40;
return ATA_CBL_PATA80;
}