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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>
This commit is contained in:
Adrian Hunter 2014-11-04 12:42:48 +02:00 committed by Ulf Hansson
parent 4f64f84348
commit 3828ecaa1d
1 changed files with 12 additions and 2 deletions
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12
drivers/mmc/host/sdhci-pci.c
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@ -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;
@ -1076,6 +1076,16 @@ static int sdhci_pci_enable_dma(struct sdhci_host *host)
"doesn't fully claim to support it.\n");
}
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;