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authorAdrian Hunter <adrian.hunter@intel.com>2014-11-04 12:42:48 +0200
committerUlf Hansson <ulf.hansson@linaro.org>2014-11-10 12:40:54 +0100
commit3828ecaa1d5c55b4ed7522079e1a66a899f70d98 (patch)
treef97dbc6268e4b06ef21e3e5cecf245255d4d9925 /drivers/mmc/host
parent4f64f84348e029c442b9caa37944754e6513cbf1 (diff)
mmc: sdhci-pci: Add 64-bit DMA support
Set a 64-bit DMA mask when using 64-bit DMA. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host')
-rw-r--r--drivers/mmc/host/sdhci-pci.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/drivers/mmc/host/sdhci-pci.c b/drivers/mmc/host/sdhci-pci.c
index 61192973e7cb..c25639b839cd 100644
--- a/drivers/mmc/host/sdhci-pci.c
+++ b/drivers/mmc/host/sdhci-pci.c
@@ -1064,7 +1064,7 @@ static int sdhci_pci_enable_dma(struct sdhci_host *host)
{
struct sdhci_pci_slot *slot;
struct pci_dev *pdev;
- int ret;
+ int ret = -1;
slot = sdhci_priv(host);
pdev = slot->chip->pdev;
@@ -1076,7 +1076,17 @@ static int sdhci_pci_enable_dma(struct sdhci_host *host)
"doesn't fully claim to support it.\n");
}
- ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
+ if (host->flags & SDHCI_USE_64_BIT_DMA) {
+ if (host->quirks2 & SDHCI_QUIRK2_BROKEN_64_BIT_DMA) {
+ host->flags &= ~SDHCI_USE_64_BIT_DMA;
+ } else {
+ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
+ if (ret)
+ dev_warn(&pdev->dev, "Failed to set 64-bit DMA mask\n");
+ }
+ }
+ if (ret)
+ ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (ret)
return ret;