[U-Boot] [PATCH v4 19/22] pcm052: bk4: sdcard: Add support for SD card booting/recovery

[Lukasz Majewski]

This code allows reusing the default u-boot as in the late board init, the
default envs are restored and proper recovery scripts executed.

Signed-off-by: Lukasz Majewski <lukma at denx.de>
---

Changes in v4: None
Changes in v3: None
Changes in v2: None

 arch/arm/cpu/armv7/vf610/Kconfig           |  1 +
 arch/arm/include/asm/arch-vf610/imx-regs.h |  2 ++
 board/phytec/pcm052/pcm052.c               | 32 ++++++++++++++++++++++++++++++
 3 files changed, 35 insertions(+)

diff --git a/arch/arm/cpu/armv7/vf610/Kconfig b/arch/arm/cpu/armv7/vf610/Kconfig
index 13905b5281..5d485a3ce2 100644
--- a/arch/arm/cpu/armv7/vf610/Kconfig
+++ b/arch/arm/cpu/armv7/vf610/Kconfig
@@ -23,6 +23,7 @@ config TARGET_BK4R1
 	bool "BK4r1"
 	select SYS_FSL_ERRATUM_ESDHC135
 	select SYS_FSL_ERRATUM_ESDHC_A001
+	select BOARD_LATE_INIT
 
 endchoice
 
diff --git a/arch/arm/include/asm/arch-vf610/imx-regs.h b/arch/arm/include/asm/arch-vf610/imx-regs.h
index 5d1f63c98b..ae0a187c4d 100644
--- a/arch/arm/include/asm/arch-vf610/imx-regs.h
+++ b/arch/arm/include/asm/arch-vf610/imx-regs.h
@@ -289,6 +289,8 @@
 #define SRC_SRSR_WDOG_M4				(0x1 << 4)
 #define SRC_SRSR_WDOG_A5				(0x1 << 3)
 #define SRC_SRSR_POR_RST				(0x1 << 0)
+#define SRC_SBMR1_BOOTCFG1_SDMMC        BIT(6)
+#define SRC_SBMR1_BOOTCFG1_MMC          BIT(4)
 #define SRC_SBMR2_BMOD_MASK             (0x3 << 24)
 #define SRC_SBMR2_BMOD_SHIFT            24
 #define SRC_SBMR2_BMOD_FUSES            0x0
diff --git a/board/phytec/pcm052/pcm052.c b/board/phytec/pcm052/pcm052.c
index 4a18b0e0f4..d4f170a503 100644
--- a/board/phytec/pcm052/pcm052.c
+++ b/board/phytec/pcm052/pcm052.c
@@ -13,6 +13,7 @@
 #include <asm/arch/ddrmc-vf610.h>
 #include <asm/arch/crm_regs.h>
 #include <asm/arch/clock.h>
+#include <environment.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -307,6 +308,37 @@ int board_init(void)
 	return 0;
 }
 
+#ifdef CONFIG_TARGET_BK4R1
+int board_late_init(void)
+{
+	struct src *psrc = (struct src *)SRC_BASE_ADDR;
+	u32 reg;
+
+	/*
+	 * BK4r1 handle emergency/service SD card boot
+	 * Checking the SBMR1 register BOOTCFG1 byte:
+	 * NAND:
+	 *      bit [2] - NAND data width - 16
+	 *	bit [5] - NAND fast boot
+	 *	bit [7] = 1 - NAND as a source of booting
+	 * SD card (0x64):
+	 *      bit [4] = 0 - SD card source
+	 *	bit [6] = 1 - SD/MMC source
+	 */
+
+	reg = readl(&psrc->sbmr1);
+	if ((reg & SRC_SBMR1_BOOTCFG1_SDMMC) &&
+	    !(reg & SRC_SBMR1_BOOTCFG1_MMC)) {
+		printf("------ SD card boot -------\n");
+		set_default_env("!LVFBootloader", 0);
+		env_set("bootcmd",
+			"run prepare_install_bk4r1_envs; run install_bk4r1rs");
+	}
+
+	return 0;
+}
+#endif /* CONFIG_TARGET_BK4R1 */
+
 int checkboard(void)
 {
 #ifdef CONFIG_TARGET_BK4R1
-- 
2.11.0