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pdc202xx_new: use ide_tune_dma()

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* remove code enabling IORDY and prefetch from config_chipset_for_dma(),
  as the comment states it has no real effect because these settings are
  overriden when the PIO mode is set (and for this driver ->autotune == 1
  so PIO mode is always programmed)

* use ide_tune_dma() in pdcnew_config_drive_xfer_rate() and remove no longer
  needed config_chipset_for_dma()

There should be no functionality changes caused by this patch.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-05-16 00:51:43 +02:00
parent 38ff8a74e8
commit 7f86723a60
1 changed files with 1 additions and 28 deletions
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29
drivers/ide/pci/pdc202xx_new.c
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@ -228,38 +228,11 @@ static u8 pdcnew_cable_detect(ide_hwif_t *hwif)
return get_indexed_reg(hwif, 0x0b) & 0x04;
}
static int config_chipset_for_dma(ide_drive_t *drive)
{
struct hd_driveid *id = drive->id;
ide_hwif_t *hwif = HWIF(drive);
u8 speed;
if (id->capability & 4) {
/*
* Set IORDY_EN & PREFETCH_EN (this seems to have
* NO real effect since this register is reloaded
* by hardware when the transfer mode is selected)
*/
u8 tmp, adj = (drive->dn & 1) ? 0x08 : 0x00;
tmp = get_indexed_reg(hwif, 0x13 + adj);
set_indexed_reg(hwif, 0x13 + adj, tmp | 0x03);
}
speed = ide_max_dma_mode(drive);
if (!speed)
return 0;
(void) hwif->speedproc(drive, speed);
return ide_dma_enable(drive);
}
static int pdcnew_config_drive_xfer_rate(ide_drive_t *drive)
{
drive->init_speed = 0;
if (ide_use_dma(drive) && config_chipset_for_dma(drive))
if (ide_tune_dma(drive))
return 0;
if (ide_use_fast_pio(drive))