From: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
Subject: [PATCH] pata_pdc202xx_old: Power Management fix
Enable burst mode on resume for PDC2026x controllers.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@xxxxxxxxx>
---
drivers/ata/pata_pdc202xx_old.c | 33 +++++++++++++++++++++++++++++++--
1 file changed, 31 insertions(+), 2 deletions(-)
Index: b/drivers/ata/pata_pdc202xx_old.c
===================================================================
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -232,14 +232,21 @@ static void pdc2026x_dev_config(struct a
adev->max_sectors = 256;
}
-static int pdc2026x_port_start(struct ata_port *ap)
+static void pdc2026x_bmdma_enable_burst(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);
}
+}
+
+static int pdc2026x_port_start(struct ata_port *ap)
+{
+ pdc2026x_bmdma_enable_burst(ap);
+
return ata_sff_port_start32(ap);
}
@@ -327,6 +334,28 @@ static int pdc202xx_init_one(struct pci_
return ata_pci_sff_init_one(dev, ppi, &pdc202xx_sht, NULL);
}
+#ifdef CONFIG_PM
+static int pdc202xx_reinit_one(struct pci_dev *pdev)
+{
+ struct ata_host *host = dev_get_drvdata(&pdev->dev);
+ int rc, i;
+
+ rc = ata_pci_device_do_resume(pdev);
+ if (rc)
+ return rc;
+
+ for (i = 0; i < host->n_ports; i++) {
+ struct ata_port *ap = host->ports[i];
+
+ if (ap->udma_mask > ATA_UDMA2)
+ pdc2026x_bmdma_enable_burst(ap);
+ }
+
+ ata_host_resume(host);
+ return 0;
+}
+#endif
+
static const struct pci_device_id pdc202xx[] = {
{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20246), 0 },
{ PCI_VDEVICE(PROMISE, PCI_DEVICE_ID_PROMISE_20262), 1 },
@@ -344,7 +373,7 @@ static struct pci_driver pdc202xx_pci_dr
.remove = ata_pci_remove_one,
#ifdef CONFIG_PM
.suspend = ata_pci_device_suspend,
- .resume = ata_pci_device_resume,
+ .resume = pdc202xx_reinit_one,
#endif
};
--
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