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alim15x3: fix handling of address setup timings 

Account for the requirements of the other device on the port.

Based on libata pata_ali host driver.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2010-01-18 07:21:05 +00:00 committed by David S. Miller
parent 8e714a074b
commit cde727be96
1 changed files with 11 additions and 0 deletions
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11
drivers/ide/alim15x3.c
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@ -72,6 +72,7 @@ static void ali_fifo_control(ide_hwif_t *hwif, ide_drive_t *drive, int on)
static void ali_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
ide_drive_t *pair = ide_get_pair_dev(drive);
int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
unsigned long T = 1000000 / bus_speed; /* PCI clock based */
int port = hwif->channel ? 0x5c : 0x58;
@ -79,6 +80,16 @@ static void ali_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
struct ide_timing t;
ide_timing_compute(drive, drive->pio_mode, &t, T, 1);
if (pair) {
struct ide_timing p;
ide_timing_compute(pair, pair->pio_mode, &p, T, 1);
ide_timing_merge(&p, &t, &t, IDE_TIMING_SETUP);
if (pair->dma_mode) {
ide_timing_compute(pair, pair->dma_mode, &p, T, 1);
ide_timing_merge(&p, &t, &t, IDE_TIMING_SETUP);
}
}
t.setup = clamp_val(t.setup, 1, 8) & 7;
t.active = clamp_val(t.active, 1, 8) & 7;