XOM pins provide information for iROM bootloader about the boot device. Those pins are mapped to lower bits of OP_MODE register (0x10000008), which is common for all Exynos SoC variants. Set the default MMC device id to reflect the boot device selected by XOM[7:5] pins (2 for the SD or 0 for the eMMC).
Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- v2: - store mmc boot device to ${mmcbootdev} env - print information about boot mmc device --- arch/arm/mach-exynos/include/mach/cpu.h | 1 + board/samsung/common/board.c | 28 +++++++++++++++++++++++++ configs/odroid-xu3_defconfig | 1 + configs/odroid_defconfig | 1 + 4 files changed, 31 insertions(+)
diff --git a/arch/arm/mach-exynos/include/mach/cpu.h b/arch/arm/mach-exynos/include/mach/cpu.h index 766edeeb29..fb5fdaf3ba 100644 --- a/arch/arm/mach-exynos/include/mach/cpu.h +++ b/arch/arm/mach-exynos/include/mach/cpu.h @@ -17,6 +17,7 @@
#define EXYNOS4_GPIO_PART3_BASE 0x03860000 #define EXYNOS4_PRO_ID 0x10000000 +#define EXYNOS4_OP_MODE 0x10000008 #define EXYNOS4_SYSREG_BASE 0x10010000 #define EXYNOS4_POWER_BASE 0x10020000 #define EXYNOS4_SWRESET 0x10020400 diff --git a/board/samsung/common/board.c b/board/samsung/common/board.c index ee2fc7971e..cb94ced54e 100644 --- a/board/samsung/common/board.c +++ b/board/samsung/common/board.c @@ -24,6 +24,8 @@ #include <asm/arch/sromc.h> #include <lcd.h> #include <i2c.h> +#include <mmc.h> +#include <stdio_dev.h> #include <usb.h> #include <dwc3-uboot.h> #include <samsung/misc.h> @@ -42,6 +44,20 @@ __weak int exynos_power_init(void) return 0; }
+/** + * get_boot_mmc_dev() - read boot MMC device id from XOM[7:5] pins. + */ +static int get_boot_mmc_dev(void) +{ + u32 mode = readl(EXYNOS4_OP_MODE) & 0x1C; + + if (mode == 0x04) + return 2; /* MMC2: SD */ + + /* MMC0: eMMC or unknown */ + return 0; +} + #if defined CONFIG_EXYNOS_TMU /* Boot Time Thermal Analysis for SoC temperature threshold breach */ static void boot_temp_check(void) @@ -280,6 +296,8 @@ int board_late_init(void) { struct udevice *dev; int ret; + int mmcbootdev = get_boot_mmc_dev(); + char mmcbootdev_str[16];
stdio_print_current_devices(); ret = uclass_first_device_err(UCLASS_CROS_EC, &dev); @@ -292,6 +310,11 @@ int board_late_init(void) panic("Cannot init cros-ec device"); return -1; } + + printf("Boot device: MMC(%u)\n", mmcbootdev); + sprintf(mmcbootdev_str, "%u", mmcbootdev); + env_set("mmcbootdev", mmcbootdev_str); + return 0; } #endif @@ -359,3 +382,8 @@ int board_usb_cleanup(int index, enum usb_init_type init) #endif return 0; } + +int mmc_get_env_dev(void) +{ + return get_boot_mmc_dev(); +} diff --git a/configs/odroid-xu3_defconfig b/configs/odroid-xu3_defconfig index 20038d4197..2e982e1b53 100644 --- a/configs/odroid-xu3_defconfig +++ b/configs/odroid-xu3_defconfig @@ -14,6 +14,7 @@ CONFIG_FIT_BEST_MATCH=y CONFIG_SILENT_CONSOLE=y CONFIG_CONSOLE_MUX=y CONFIG_MISC_INIT_R=y +CONFIG_BOARD_LATE_INIT=y # CONFIG_DISPLAY_BOARDINFO is not set CONFIG_DISPLAY_BOARDINFO_LATE=y CONFIG_BOARD_TYPES=y diff --git a/configs/odroid_defconfig b/configs/odroid_defconfig index be914e4caf..e4392e477e 100644 --- a/configs/odroid_defconfig +++ b/configs/odroid_defconfig @@ -17,6 +17,7 @@ CONFIG_BOOTARGS="Please use defined boot" CONFIG_SYS_CONSOLE_IS_IN_ENV=y CONFIG_SYS_CONSOLE_INFO_QUIET=y CONFIG_MISC_INIT_R=y +CONFIG_BOARD_LATE_INIT=y CONFIG_BOARD_TYPES=y CONFIG_SYS_PROMPT="Odroid # " # CONFIG_CMD_XIMG is not set