[MMC] sdhci: more DMA capabilities tests

Properly test for controller interface to see if it's DMA capable.  As many
controllers are misconfigured in this regard, also add debug parameters to
force DMA support either way.

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>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/mmc/sdhci.h b/drivers/mmc/sdhci.h
index 758cf1c24364..8111fa38c05b 100644
--- a/drivers/mmc/sdhci.h
+++ b/drivers/mmc/sdhci.h
@@ -12,6 +12,10 @@
  * PCI registers
  */
 
+#define PCI_SDHCI_IFPIO                 0x00
+#define PCI_SDHCI_IFDMA                 0x01
+#define PCI_SDHCI_IFVENDOR              0x02
+
 #define PCI_SLOT_INFO                   0x40    /* 8 bits */
 #define  PCI_SLOT_INFO_SLOTS(x)         ((x >> 4) & 7)
 #define  PCI_SLOT_INFO_FIRST_BAR_MASK   0x07