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ide: add ide_set_dma() helper (v2)

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* add ide_set_dma() helper and make ide_hwif_t.ide_dma_check return
  -1 when DMA needs to be disabled (== need to call ->ide_dma_off_quietly)
   0 when DMA needs to be enabled  (== need to call ->ide_dma_on)
   1 when DMA setting shouldn't be changed
* fix IDE code to use ide_set_dma() instead if using ->ide_dma_check directly

v2:
* updated for scc_pata

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz
2007-02-17 02:40:26 +01:00
parent 9ef5791e1b
commit 3608b5d71a
36 changed files with 120 additions and 139 deletions
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10
drivers/ide/pci/piix.c
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@@ -386,19 +386,17 @@ static int piix_config_drive_for_dma (ide_drive_t *drive)
static int piix_config_drive_xfer_rate (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
drive->init_speed = 0;
if (ide_use_dma(drive) && piix_config_drive_for_dma(drive))
return hwif->ide_dma_on(drive);
return 0;
if (ide_use_fast_pio(drive))
/* Find best PIO mode. */
(void) hwif->speedproc(drive, XFER_PIO_0 +
ide_get_best_pio_mode(drive, 255, 4, NULL));
piix_tune_chipset(drive, XFER_PIO_0 +
ide_get_best_pio_mode(drive, 255, 4, NULL));
return hwif->ide_dma_off_quietly(drive);
return -1;
}
/**