it821x: Add ultra_mask quirk for Vortex86SX
On Vortex86SX with IDE controller revision 0x11 ultra DMA must be
disabled. This patch was tested by DMP and seems to work.
It is a cleaned up version of their older Kernel patch:
http://www.dmp.com.tw/tech/vortex86sx/patch-2.6.24-DMP.gz
Tested-by: Shawn Lin <shawn@dmp.com.tw>
Signed-off-by: Brandon Philips <bphilips@suse.de>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/it821x.c b/drivers/ide/it821x.c
index 0be27ac..983440a 100644
--- a/drivers/ide/it821x.c
+++ b/drivers/ide/it821x.c
@@ -68,6 +68,8 @@
#define DRV_NAME "it821x"
+#define QUIRK_VORTEX86 1
+
struct it821x_dev
{
unsigned int smart:1, /* Are we in smart raid mode */
@@ -79,6 +81,7 @@
u16 pio[2]; /* Cached PIO values */
u16 mwdma[2]; /* Cached MWDMA values */
u16 udma[2]; /* Cached UDMA values (per drive) */
+ u16 quirks;
};
#define ATA_66 0
@@ -577,6 +580,12 @@
hwif->ultra_mask = ATA_UDMA6;
hwif->mwdma_mask = ATA_MWDMA2;
+
+ /* Vortex86SX quirk: prevent Ultra-DMA mode to fix BadCRC issue */
+ if (idev->quirks & QUIRK_VORTEX86) {
+ if (dev->revision == 0x11)
+ hwif->ultra_mask = 0;
+ }
}
static void it8212_disable_raid(struct pci_dev *dev)
@@ -649,6 +658,8 @@
return -ENOMEM;
}
+ itdevs->quirks = id->driver_data;
+
rc = ide_pci_init_one(dev, &it821x_chipset, itdevs);
if (rc)
kfree(itdevs);
@@ -668,6 +679,7 @@
static const struct pci_device_id it821x_pci_tbl[] = {
{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8211), 0 },
{ PCI_VDEVICE(ITE, PCI_DEVICE_ID_ITE_8212), 0 },
+ { PCI_VDEVICE(RDC, PCI_DEVICE_ID_RDC_D1010), QUIRK_VORTEX86 },
{ 0, },
};