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mmc: dw_mmc: set fixed burst in BMOD register

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This patch uses the fixed burst bit when using an internal DMA controller.
I found increased performance with IDMAC when this bit is set.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Jaehoon Chung 2011-02-25 11:08:13 +09:00 committed by Chris Ball
parent cf5e23e1c2
commit a5289a433d
1 changed files with 2 additions and 2 deletions
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4
drivers/mmc/host/dw_mmc.c
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@ -316,7 +316,7 @@ 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);
}
@ -385,7 +385,7 @@ 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 */