[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 7994c0b70f1576d85ed0358ffdea69e4d07bb685..16ed2ae929d32f4a7f5c35703c5e90ed2cc818a2 100644 (file)
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -33,6 +33,7 @@ static unsigned int debug_forcedma = 0;
 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 @@ static const struct pci_device_id pci_ids[] __devinitdata = {
                .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 @@ static int __devinit sdhci_probe_slot(struct pci_dev *pdev, int slot)
        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");