Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7c168e3db7d900008ee304574057e0dc1a8505af
Commit: 7c168e3db7d900008ee304574057e0dc1a8505af
Parent: 56e71efe44eb06ae1761f43cca70a5f3cc54c0fb
Author: Feng Tang <[EMAIL PROTECTED]>
AuthorDate: Sun Sep 30 12:44:18 2007 +0200
Committer: Pierre Ossman <[EMAIL PROTECTED]>
CommitDate: Wed Oct 3 18:40:33 2007 +0200
sdhci: add SDHCI_QUIRK_BROKEN_DMA quirk
Some controllers like ENE712 can't work properly with DMA mode,
add this quirk to force these kinds of HW work with PIO mode
Signed-off-by: Feng Tang <[EMAIL PROTECTED]>
Signed-off-by: Pierre Ossman <[EMAIL PROTECTED]>
---
drivers/mmc/host/sdhci.c | 13 +++++++++++--
1 files changed, 11 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 866528c..2b4a86c 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -35,6 +35,7 @@ static unsigned int debug_quirks = 0;
#define SDHCI_QUIRK_NO_CARD_NO_RESET (1<<2)
#define SDHCI_QUIRK_SINGLE_POWER_WRITE (1<<3)
#define SDHCI_QUIRK_RESET_CMD_DATA_ON_IOS (1<<4)
+#define SDHCI_QUIRK_BROKEN_DMA (1<<5)
static const struct pci_device_id pci_ids[] __devinitdata = {
{
@@ -68,7 +69,8 @@ static const struct pci_device_id pci_ids[] __devinitdata = {
.device = PCI_DEVICE_ID_ENE_CB712_SD,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
- .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE,
+ .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE |
+ SDHCI_QUIRK_BROKEN_DMA,
},
{
@@ -76,7 +78,8 @@ static const struct pci_device_id pci_ids[] __devinitdata = {
.device = PCI_DEVICE_ID_ENE_CB712_SD_2,
.subvendor = PCI_ANY_ID,
.subdevice = PCI_ANY_ID,
- .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE,
+ .driver_data = SDHCI_QUIRK_SINGLE_POWER_WRITE |
+ SDHCI_QUIRK_BROKEN_DMA,
},
{
@@ -1304,6 +1307,12 @@ static int __devinit sdhci_probe_slot(struct pci_dev
*pdev, int slot)
else
host->flags |= SDHCI_USE_DMA;
+ if ((chip->quirks & SDHCI_QUIRK_BROKEN_DMA) &&
+ (host->flags & SDHCI_USE_DMA)) {
+ DBG("Disabling DMA as it is marked broken");
+ host->flags &= ~SDHCI_USE_DMA;
+ }
+
if (((pdev->class & 0x0000FF) != PCI_SDHCI_IFDMA) &&
(host->flags & SDHCI_USE_DMA)) {
printk(KERN_WARNING "%s: Will use DMA "
-
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