DWMMC: SMDK5420: Disable SMU for eMMC
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@samsung.com>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Acked-by: Simon Glass <sjg@chromium.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Acked-by: Pantelis Antoniou <panto@antoniou-consulting.com>
diff --git a/arch/arm/include/asm/arch-exynos/dwmmc.h b/arch/arm/include/asm/arch-exynos/dwmmc.h
index b9eca76..d1c5d4f 100644
--- a/arch/arm/include/asm/arch-exynos/dwmmc.h
+++ b/arch/arm/include/asm/arch-exynos/dwmmc.h
@@ -14,6 +14,19 @@
#define DWMCI_SET_DRV_CLK(x) ((x) << 16)
#define DWMCI_SET_DIV_RATIO(x) ((x) << 24)
+#define EMMCP_MPSBEGIN0 0x1200
+#define EMMCP_SEND0 0x1204
+#define EMMCP_CTRL0 0x120C
+
+#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)
+
#ifdef CONFIG_OF_CONTROL
int exynos_dwmmc_init(const void *blob);
#endif
diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index 174e3b5..1e0f72b 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -11,6 +11,7 @@
#include <mmc.h>
#include <dwmmc.h>
#include <asm-generic/errno.h>
+#include <asm/arch/dwmmc.h>
#define PAGE_SIZE 4096
@@ -301,6 +302,16 @@
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 1f2c53f..a0f1511 100644
--- a/drivers/mmc/exynos_dw_mmc.c
+++ b/drivers/mmc/exynos_dw_mmc.c
@@ -62,6 +62,9 @@
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 ecaa763..6c91143 100644
--- a/include/dwmmc.h
+++ b/include/dwmmc.h
@@ -123,6 +123,9 @@
#define DWMCI_BMOD_IDMAC_FB (1 << 1)
#define DWMCI_BMOD_IDMAC_EN (1 << 7)
+/* quirks */
+#define DWMCI_QUIRK_DISABLE_SMU (1 << 0)
+
struct dwmci_host {
char *name;
void *ioaddr;