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