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mmc: esdhc: Fix DMA_MASK to not break mx25 DMA access 

Patch to not set reserved bits in i.MX25 PROCTL register.  DMA stops
working if those bits get set.

Signed-off-by: Wilson Callan <wilson.callan@savantsystems.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Wilson Callan 2012-07-19 02:49:16 -04:00 committed by Chris Ball
parent 108ecc4cf9
commit 9a0985b78d
1 changed files with 7 additions and 2 deletions
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9
drivers/mmc/host/sdhci-esdhc-imx.c
View File

@ -299,6 +299,8 @@ static void esdhc_writew_le(struct sdhci_host *host, u16 val, int reg)
static void esdhc_writeb_le(struct sdhci_host *host, u8 val, int reg)
{
struct sdhci_pltfm_host *pltfm_host = sdhci_priv(host);
struct pltfm_imx_data *imx_data = pltfm_host->priv;
u32 new_val;
switch (reg) {
@ -315,8 +317,11 @@ static void esdhc_writeb_le(struct sdhci_host *host, u8 val, int reg)
SDHCI_CTRL_D3CD);
/* ensure the endianess */
new_val |= ESDHC_HOST_CONTROL_LE;
/* DMA mode bits are shifted */
new_val |= (val & SDHCI_CTRL_DMA_MASK) << 5;
/* bits 8&9 are reserved on mx25 */
if (!is_imx25_esdhc(imx_data)) {
/* DMA mode bits are shifted */
new_val |= (val & SDHCI_CTRL_DMA_MASK) << 5;
}
esdhc_clrset_le(host, 0xffff, new_val, reg);
return;