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Subject[PATCH v2 11/14] mmc: mmci: Add support to data commands via variant structure.
Date
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

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>
---
drivers/mmc/host/mmci.c | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/drivers/mmc/host/mmci.c b/drivers/mmc/host/mmci.c
index 0a0fc22..05ae654 100644
--- 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.
@@ -81,6 +82,7 @@ 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;
@@ -188,6 +190,7 @@ static struct variant_data variant_qcom = {
.clkreg_enable = MCI_QCOM_CLK_FLOWENA,
.clkreg_8bit_bus_enable = MCI_QCOM_CLK_WIDEBUS_8,
.datactrl_mask_ddrmode = MCI_QCOM_CLK_DDR_MODE,
+ .data_cmd_enable = MCI_QCOM_CSPM_DATCMD,
.blksz_datactrl4 = true,
.datalength_bits = 24,
.blksz_datactrl4 = true,
@@ -874,6 +877,9 @@ 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;

mmci_writel(host, cmd->arg, MMCIARGUMENT);
--
1.9.1


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