[U-Boot] [PATCH V3 5/5] mmc: sdhci: fix sdma bug for large file transfer

Lei Wen leiwen at marvell.com
Sat Oct 8 15:47:16 CEST 2011


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 at marvell.com>
---
Changelog:
V2: no change
V3: new added fix for sdma bug

 drivers/mmc/sdhci.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
index 77a9e70..fce0ef0 100644
--- a/drivers/mmc/sdhci.c
+++ b/drivers/mmc/sdhci.c
@@ -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);
 		}
-- 
1.7.0.4



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