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libata: fix CFA handling in ide_timing_compute() 

Use standard cycle timing for CFA PIO5 and PIO6 modes.

Based on commit 74638c8 for IDE subsystem.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
hifive-unleashed-5.1
Bartlomiej Zolnierkiewicz 2010-01-18 18:13:57 +01:00 committed by Jeff Garzik
parent 02d1d6160f
commit 9e8808a99c
1 changed files with 11 additions and 6 deletions
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17
drivers/ata/libata-core.c
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@ -3211,6 +3211,7 @@ const struct ata_timing *ata_timing_find_mode(u8 xfer_mode)
int ata_timing_compute(struct ata_device *adev, unsigned short speed,
struct ata_timing *t, int T, int UT)
{
const u16 *id = adev->id;
const struct ata_timing *s;
struct ata_timing p;
@ -3228,14 +3229,18 @@ int ata_timing_compute(struct ata_device *adev, unsigned short speed,
* PIO/MW_DMA cycle timing.
*/
if (adev->id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
if (id[ATA_ID_FIELD_VALID] & 2) { /* EIDE drive */
memset(&p, 0, sizeof(p));
if (speed >= XFER_PIO_0 && speed <= XFER_SW_DMA_0) {
if (speed <= XFER_PIO_2) p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO];
else p.cycle = p.cyc8b = adev->id[ATA_ID_EIDE_PIO_IORDY];
} else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2) {
p.cycle = adev->id[ATA_ID_EIDE_DMA_MIN];
}
if (speed <= XFER_PIO_2)
p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO];
else if ((speed <= XFER_PIO_4) ||
(speed == XFER_PIO_5 && !ata_id_is_cfa(id)))
p.cycle = p.cyc8b = id[ATA_ID_EIDE_PIO_IORDY];
} else if (speed >= XFER_MW_DMA_0 && speed <= XFER_MW_DMA_2)
p.cycle = id[ATA_ID_EIDE_DMA_MIN];
ata_timing_merge(&p, t, t, ATA_TIMING_CYCLE | ATA_TIMING_CYC8B);
}