mmc: dw_mmc: exynos: add the function for controlling SMU
Some of Exynos has the Security management Unit(SMU).
This patch adds the function for controlling SMU.
In future, if exynos needs to control SMU, it can be implemented
in "config_smu" function, not "init" function.
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index 8790f2a..0e989eb 100644
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -91,10 +91,14 @@
return SDMMC_CLKSEL_GET_DIV(mci_readl(host, CLKSEL)) + 1;
}
-static int dw_mci_exynos_priv_init(struct dw_mci *host)
+static void dw_mci_exynos_config_smu(struct dw_mci *host)
{
struct dw_mci_exynos_priv_data *priv = host->priv;
+ /*
+ * If Exynos is provided the Security management,
+ * set for non-ecryption mode at this time.
+ */
if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS5420_SMU ||
priv->ctrl_type == DW_MCI_TYPE_EXYNOS7_SMU) {
mci_writel(host, MPSBEGIN0, 0);
@@ -104,6 +108,13 @@
SDMMC_MPSCTRL_VALID |
SDMMC_MPSCTRL_NON_SECURE_WRITE_BIT);
}
+}
+
+static int dw_mci_exynos_priv_init(struct dw_mci *host)
+{
+ struct dw_mci_exynos_priv_data *priv = host->priv;
+
+ dw_mci_exynos_config_smu(host);
if (priv->ctrl_type >= DW_MCI_TYPE_EXYNOS5420) {
priv->saved_strobe_ctrl = mci_readl(host, HS400_DLINE_CTRL);
@@ -169,7 +180,7 @@
{
struct dw_mci *host = dev_get_drvdata(dev);
- dw_mci_exynos_priv_init(host);
+ dw_mci_exynos_config_smu(host);
return dw_mci_resume(host);
}