Exynos5420 Mobile Storage Host controller has Security Management Unit
(SMU) for channel 0 and channel 1 (mainly for eMMC).This patch configures
SMU for exynos5420.
This patch is on top of the below patch by Doug Anderson.
mmc: dw_mmc: Add exynos resume_noirq callback to clear WAKEUP_INT
changes since V2:
1.Droppped the bypass-smu quirk.
2.Changed the subject line for this patch
add a quirk for SMU -> configure SMU in exynos5420
changes since V1:
1.avoid code duplication by calling dw_mci_exynos_priv_init in
resume path.
Signed-off-by: Yuvaraj Kumar C D <yuvaraj.cd@xxxxxxxxxxx>
Signed-off-by: Alim Akhtar <alim.akhtar@xxxxxxxxxxx>
---
drivers/mmc/host/dw_mmc-exynos.c | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/drivers/mmc/host/dw_mmc-exynos.c b/drivers/mmc/host/dw_mmc-exynos.c
index 19c845b..db28f10 100644
--- a/drivers/mmc/host/dw_mmc-exynos.c
+++ b/drivers/mmc/host/dw_mmc-exynos.c
@@ -35,6 +35,25 @@
#define EXYNOS4210_FIXED_CIU_CLK_DIV 2
#define EXYNOS4412_FIXED_CIU_CLK_DIV 4
+/* Block number in eMMC */
+#define DWMCI_BLOCK_NUM 0xFFFFFFFF
+
+#define SDMMC_EMMCP_BASE 0x1000
+#define SDMMC_MPSECURITY (SDMMC_EMMCP_BASE + 0x0010)
+#define SDMMC_MPSBEGIN0 (SDMMC_EMMCP_BASE + 0x0200)
+#define SDMMC_MPSEND0 (SDMMC_EMMCP_BASE + 0x0204)
+#define SDMMC_MPSCTRL0 (SDMMC_EMMCP_BASE + 0x020C)
+
+/* SMU control bits */
+#define DWMCI_MPSCTRL_SECURE_READ_BIT BIT(7)
+#define DWMCI_MPSCTRL_SECURE_WRITE_BIT BIT(6)
+#define DWMCI_MPSCTRL_NON_SECURE_READ_BIT BIT(5)
+#define DWMCI_MPSCTRL_NON_SECURE_WRITE_BIT BIT(4)
+#define DWMCI_MPSCTRL_USE_FUSE_KEY BIT(3)
+#define DWMCI_MPSCTRL_ECB_MODE BIT(2)
+#define DWMCI_MPSCTRL_ENCRYPTION BIT(1)
+#define DWMCI_MPSCTRL_VALID BIT(0)
+
/* Variations in Exynos specific dw-mshc controller */
enum dw_mci_exynos_type {
DW_MCI_TYPE_EXYNOS4210,
@@ -74,6 +93,15 @@ static int dw_mci_exynos_priv_init(struct dw_mci *host)
{
struct dw_mci_exynos_priv_data *priv = host->priv;
+ if (priv->ctrl_type == DW_MCI_TYPE_EXYNOS5420) {
+ mci_writel(host, MPSBEGIN0, 0);
+ mci_writel(host, MPSEND0, DWMCI_BLOCK_NUM);
+ mci_writel(host, MPSCTRL0, DWMCI_MPSCTRL_SECURE_WRITE_BIT |
+ DWMCI_MPSCTRL_NON_SECURE_READ_BIT |
+ DWMCI_MPSCTRL_VALID |
+ DWMCI_MPSCTRL_NON_SECURE_WRITE_BIT);
+ }
+
return 0;
}
@@ -107,6 +135,7 @@ static int dw_mci_exynos_resume(struct device *dev)
{
struct dw_mci *host = dev_get_drvdata(dev);
+ dw_mci_exynos_priv_init(host);
return dw_mci_resume(host);
}
--
1.7.9.5
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