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 --- Changelog: V2: no change V3: new added fix for sdma bug V4: no change
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); }