diff options
| author | Pierre Ossman <drzeus@drzeus.cx> | 2006-06-30 02:22:34 -0700 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2006-07-02 18:02:01 +0100 |
| commit | 98608076a21914ab12f1c858a0cdf55366260f12 (patch) | |
| tree | e027e6689c66fa3c5dfacac4d6217efc5553252c | |
| parent | 645289dca5021224279e67b4655796cafdfdad00 (diff) | |
| download | lwn-98608076a21914ab12f1c858a0cdf55366260f12.tar.gz lwn-98608076a21914ab12f1c858a0cdf55366260f12.zip | |
[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>
| -rw-r--r-- | drivers/mmc/sdhci.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c index 7994c0b70f15..16ed2ae929d3 100644 --- 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"); |