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mmc: sdhci: fix sdma bug for large file transfer

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SDHCI spec need to reset the sdma base address while the software
try to accorss the 512k bytes address boundary. When meet such
accross behavior, sdhci controller would generate a interrupt
automatically, and software need handle this.

Signed-off-by: Lei Wen <leiwen@marvell.com>
This commit is contained in:
Lei Wen 2011-10-08 04:14:58 +00:00 committed by Andy Fleming
parent a004abde88
commit 3e81c77240
1 changed files with 1 additions and 1 deletions
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2
drivers/mmc/sdhci.c
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@ -104,7 +104,7 @@ static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data,
#ifdef CONFIG_MMC_SDMA
if (stat & SDHCI_INT_DMA_END) {
sdhci_writel(host, SDHCI_INT_DMA_END, SDHCI_INT_STATUS);
start_addr &= SDHCI_DEFAULT_BOUNDARY_SIZE - 1;
start_addr &= ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1);
start_addr += SDHCI_DEFAULT_BOUNDARY_SIZE;
sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
}