[U-Boot] [PATCH 10/10 V4] DWMMC: SMDK5420: Disable SMU for eMMC

[Rajeshwari S Shinde]

SMDK5420 has a new Security Management Unit added
for dwmmc driver, hence, configuring the control
registers to support booting via eMMC.

Signed-off-by: Alim Akhtar <alim.akhtar at samsung.com>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s at samsung.com>
---
Changes in V3:
	- New patch.
Changes in V4:
	Added flag to dissble SMU
 drivers/mmc/dw_mmc.c        | 10 ++++++++++
 drivers/mmc/exynos_dw_mmc.c |  3 +++
 include/dwmmc.h             | 15 +++++++++++++++
 3 files changed, 28 insertions(+)

diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index a82ee17..2a8da5c 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -300,6 +300,16 @@ static int dwmci_init(struct mmc *mmc)
 	struct dwmci_host *host = (struct dwmci_host *)mmc->priv;
 	u32 fifo_size;
 
+	if (host->quirks & DWMCI_QUIRK_DISABLE_SMU) {
+		dwmci_writel(host, EMMCP_MPSBEGIN0, 0);
+		dwmci_writel(host, EMMCP_SEND0, 0);
+		dwmci_writel(host, EMMCP_CTRL0,
+			     MPSCTRL_SECURE_READ_BIT |
+			     MPSCTRL_SECURE_WRITE_BIT |
+			     MPSCTRL_NON_SECURE_READ_BIT |
+			     MPSCTRL_NON_SECURE_WRITE_BIT | MPSCTRL_VALID);
+	}
+
 	dwmci_writel(host, DWMCI_PWREN, 1);
 
 	if (!dwmci_wait_reset(host, DWMCI_RESET_ALL)) {
diff --git a/drivers/mmc/exynos_dw_mmc.c b/drivers/mmc/exynos_dw_mmc.c
index 4ef9fec..f7439a0 100644
--- a/drivers/mmc/exynos_dw_mmc.c
+++ b/drivers/mmc/exynos_dw_mmc.c
@@ -62,6 +62,9 @@ int exynos_dwmci_add_port(int index, u32 regbase, int bus_width, u32 clksel)
 	host->name = "EXYNOS DWMMC";
 	host->ioaddr = (void *)regbase;
 	host->buswidth = bus_width;
+#ifdef CONFIG_EXYNOS5420
+	host->quirks = DWMCI_QUIRK_DISABLE_SMU;
+#endif
 
 	if (clksel) {
 		host->clksel_val = clksel;
diff --git a/include/dwmmc.h b/include/dwmmc.h
index 08ced0b..00bceec 100644
--- a/include/dwmmc.h
+++ b/include/dwmmc.h
@@ -49,6 +49,9 @@
 #define DWMCI_DSCADDR		0x094
 #define DWMCI_BUFADDR		0x098
 #define DWMCI_DATA		0x200
+#define EMMCP_MPSBEGIN0		0x1200
+#define EMMCP_SEND0		0x1204
+#define EMMCP_CTRL0		0x120C
 
 /* Interrupt Mask register */
 #define DWMCI_INTMSK_ALL	0xffffffff
@@ -123,6 +126,18 @@
 #define DWMCI_BMOD_IDMAC_FB	(1 << 1)
 #define DWMCI_BMOD_IDMAC_EN	(1 << 7)
 
+#define MPSCTRL_SECURE_READ_BIT		(0x1<<7)
+#define MPSCTRL_SECURE_WRITE_BIT	(0x1<<6)
+#define MPSCTRL_NON_SECURE_READ_BIT	(0x1<<5)
+#define MPSCTRL_NON_SECURE_WRITE_BIT	(0x1<<4)
+#define MPSCTRL_USE_FUSE_KEY		(0x1<<3)
+#define MPSCTRL_ECB_MODE		(0x1<<2)
+#define MPSCTRL_ENCRYPTION		(0x1<<1)
+#define MPSCTRL_VALID			(0x1<<0)
+
+/* quirks */
+#define DWMCI_QUIRK_DISABLE_SMU		(1 << 0)
+
 struct dwmci_host {
 	char *name;
 	void *ioaddr;
-- 
1.7.12.4