[PATCH 1/3] dw_mmc: set fixed burst in BMOD register

Jaehoon Chung
2011-02-25T02:08:41Z

This patch is applied fixed burst.
If use internal DMA controller, i think that need to set this bit.

I tested when set this bit or not. I found that increase performance with IDMAC

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---
drivers/mmc/host/dw_mmc.c | 4 ++--
1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 58476c1..46e5a89 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -315,7 +315,7 @@ static void dw_mci_idmac_stop_dma(struct dw_mci *host)

/* Stop the IDMAC running */
temp = mci_readl(host, BMOD);
- temp &= ~SDMMC_IDMAC_ENABLE;
+ temp &= ~(SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB);
mci_writel(host, BMOD, temp);
}

@@ -384,7 +384,7 @@ static void dw_mci_idmac_start_dma(struct dw_mci *host, unsigned int sg_len)

/* Enable the IDMAC */
temp = mci_readl(host, BMOD);
- temp |= SDMMC_IDMAC_ENABLE;
+ temp |= SDMMC_IDMAC_ENABLE | SDMMC_IDMAC_FB;
mci_writel(host, BMOD, temp);

/* Start it running */