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pata_pdc202xx_old: Further fixups 

Turns out distros always enabled burst mode and it is pretty essential so
do the same. Also sort out the post DMA mode restore properly.

My 20263 card now seems happy but needs some four drive tests done yet
(when I've persuaded the kernel not to hang in the edd boot code if I
plug them in ..)

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
hifive-unleashed-5.1
Alan Cox 2008-01-04 00:08:49 +00:00 committed by Jeff Garzik
parent 277d72a374
commit 36906d9bea
1 changed files with 13 additions and 2 deletions
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15
drivers/ata/pata_pdc202xx_old.c
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@ -215,8 +215,8 @@ static void pdc2026x_bmdma_stop(struct ata_queued_cmd *qc)
/* Flip back to 33Mhz for PIO */
if (adev->dma_mode >= XFER_UDMA_2)
iowrite8(ioread8(clock) & ~sel66, clock);
ata_bmdma_stop(qc);
pdc202xx_set_piomode(ap, adev);
}
/**
@ -233,6 +233,17 @@ static void pdc2026x_dev_config(struct ata_device *adev)
adev->max_sectors = 256;
}
static int pdc2026x_port_start(struct ata_port *ap)
{
void __iomem *bmdma = ap->ioaddr.bmdma_addr;
if (bmdma) {
/* Enable burst mode */
u8 burst = ioread8(bmdma + 0x1f);
iowrite8(burst | 0x01, bmdma + 0x1f);
}
return ata_sff_port_start(ap);
}
static struct scsi_host_template pdc202xx_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
@ -313,7 +324,7 @@ static struct ata_port_operations pdc2026x_port_ops = {
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
.port_start = pdc2026x_port_start,
};
static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)