Commit 409ba47c authored by Sergei Shtylyov's avatar Sergei Shtylyov Committed by Jeff Garzik

(2.6.20) pata_oldpiix: fix PIO2 underclocking

Fix the PIO mode 2 using mode 0 timings -- this driver should enable the
fast timing bank starting with PIO2, just like the ata_piix driver does.
Also, fix/rephrase some comments while at it.
Signed-off-by: default avatarSergei Shtylyov <[email protected]>
Signed-off-by: default avatarJeff Garzik <[email protected]>
parent 49554c19
......@@ -25,7 +25,7 @@
#include <linux/ata.h>
#define DRV_NAME "pata_oldpiix"
#define DRV_VERSION "0.5.2"
#define DRV_VERSION "0.5.3"
/**
* oldpiix_pre_reset - probe begin
......@@ -94,19 +94,21 @@ static void oldpiix_set_piomode (struct ata_port *ap, struct ata_device *adev)
{ 2, 1 },
{ 2, 3 }, };
if (pio > 2)
control |= 1; /* TIME1 enable */
if (pio > 1)
control |= 1; /* TIME */
if (ata_pio_need_iordy(adev))
control |= 2; /* IE IORDY */
control |= 2; /* IE */
/* Intel specifies that the PPE functionality is for disk only */
/* Intel specifies that the prefetch/posting is for disk only */
if (adev->class == ATA_DEV_ATA)
control |= 4; /* PPE enable */
control |= 4; /* PPE */
pci_read_config_word(dev, idetm_port, &idetm_data);
/* Enable PPE, IE and TIME as appropriate. Clear the other
drive timing bits */
/*
* Set PPE, IE and TIME as appropriate.
* Clear the other drive's timing bits.
*/
if (adev->devno == 0) {
idetm_data &= 0xCCE0;
idetm_data |= control;
......
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