[MMC] sdhci: force DMA on some controllers
Some controllers incorrectly report that the cannot do DMA. Forcefully enable
it for those that we know it works fine on.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 7994c0b..16ed2ae 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -33,6 +33,7 @@
static unsigned int debug_quirks = 0;
#define SDHCI_QUIRK_CLOCK_BEFORE_RESET (1<<0)
+#define SDHCI_QUIRK_FORCE_DMA (1<<1)
static const struct pci_device_id pci_ids[] __devinitdata = {
{
@@ -40,7 +41,24 @@
.device = PCI_DEVICE_ID_RICOH_R5C822,
.subvendor = PCI_VENDOR_ID_IBM,
.subdevice = PCI_ANY_ID,
- .driver_data = SDHCI_QUIRK_CLOCK_BEFORE_RESET,
+ .driver_data = SDHCI_QUIRK_CLOCK_BEFORE_RESET |
+ SDHCI_QUIRK_FORCE_DMA,
+ },
+
+ {
+ .vendor = PCI_VENDOR_ID_RICOH,
+ .device = PCI_DEVICE_ID_RICOH_R5C822,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = SDHCI_QUIRK_FORCE_DMA,
+ },
+
+ {
+ .vendor = PCI_VENDOR_ID_TI,
+ .device = PCI_DEVICE_ID_TI_XX21_XX11_SD,
+ .subvendor = PCI_ANY_ID,
+ .subdevice = PCI_ANY_ID,
+ .driver_data = SDHCI_QUIRK_FORCE_DMA,
},
{ /* Generic SD host controller */
@@ -1190,7 +1208,9 @@
else if (debug_forcedma) {
DBG("DMA forced on\n");
host->flags |= SDHCI_USE_DMA;
- } else if ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA)
+ } else if (chip->quirks & SDHCI_QUIRK_FORCE_DMA)
+ host->flags |= SDHCI_USE_DMA;
+ else if ((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA)
DBG("Controller doesn't have DMA interface\n");
else if (!(caps & SDHCI_CAN_DO_DMA))
DBG("Controller doesn't have DMA capability\n");