mmc: mmci: Add support to data commands via variant structure.

On some SOCs like Qcom there are explicit bits in the command register
to specify if its a data transfer command or not. So this patch adds
support to such bits in variant data, giving more flexibility to the
driver.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 5228c5de334d9ca9c300fe83bd636b8ce41b2a6f..0a8cdac1f59ca663811fd3192772243cf975f465 100644 (file)
--- a/drivers/mmc/host/mmci.c
+++ b/drivers/mmc/host/mmci.c
@@ -59,6 +59,7 @@ static unsigned int fmax = 515633;
  *           is asserted (likewise for RX)
  * @fifohalfsize: number of bytes that can be written when MCI_TXFIFOHALFEMPTY
  *               is asserted (likewise for RX)
+ * @data_cmd_enable: enable value for data commands.
  * @sdio: variant supports SDIO
  * @st_clkdiv: true if using a ST-specific clock divider algorithm
  * @datactrl_mask_ddrmode: ddr mode mask in datactrl register.
@@ -79,6 +80,7 @@ struct variant_data {
        unsigned int            datalength_bits;
        unsigned int            fifosize;
        unsigned int            fifohalfsize;
+       unsigned int            data_cmd_enable;
        unsigned int            datactrl_mask_ddrmode;
        bool                    sdio;
        bool                    st_clkdiv;
@@ -841,6 +843,9 @@ mmci_start_command(struct mmci_host *host, struct mmc_command *cmd, u32 c)
        if (/*interrupt*/0)
                c |= MCI_CPSM_INTERRUPT;
 
+       if (mmc_cmd_type(cmd) == MMC_CMD_ADTC)
+               c |= host->variant->data_cmd_enable;
+
        host->cmd = cmd;
 
        writel(cmd->arg, base + MMCIARGUMENT);