It is possible to boot from a few media devices, especially using a micro SD or eMMC slots. In this situation depends on a boot device - some setup can be changeg.
This change adds function: boot_device() - which returns an OM[1:5] bits value
This allows checking if boot device is SD(0x2).
Signed-off-by: Przemyslaw Marczak p.marczak@samsung.com
--- Changes v3: - new commit after separate one into two --- board/samsung/common/board.c | 10 +++++++++- include/samsung/misc.h | 7 +++++++ 2 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/board/samsung/common/board.c b/board/samsung/common/board.c index 9dc7c83..ecf3f76 100644 --- a/board/samsung/common/board.c +++ b/board/samsung/common/board.c @@ -41,6 +41,13 @@ int __exynos_power_init(void) int exynos_power_init(void) __attribute__((weak, alias("__exynos_power_init")));
+unsigned int boot_device(void) +{ + unsigned int om_stat = samsung_get_base_power(); + + return BOOT_DEVICE(readl(om_stat)); +} + #if defined CONFIG_EXYNOS_TMU /* Boot Time Thermal Analysis for SoC temperature threshold breach */ static void boot_temp_check(void) @@ -243,19 +250,20 @@ int board_eth_init(bd_t *bis) int board_mmc_init(bd_t *bis) { int ret; + #ifdef CONFIG_DWMMC /* dwmmc initializattion for available channels */ ret = exynos_dwmmc_init(gd->fdt_blob); if (ret) debug("dwmmc init failed\n"); #endif - #ifdef CONFIG_SDHCI /* mmc initializattion for available channels */ ret = exynos_mmc_init(gd->fdt_blob); if (ret) debug("mmc init failed\n"); #endif + return ret; } #endif diff --git a/include/samsung/misc.h b/include/samsung/misc.h index 10653a1..57bac7d 100644 --- a/include/samsung/misc.h +++ b/include/samsung/misc.h @@ -28,4 +28,11 @@ void check_boot_mode(void); void draw_logo(void); #endif
+#define BOOT_DEVICE_SDMMC 0x2 +#define BOOT_DEVICE_MASK 0x1f +#define BOOT_DEVICE_SHIFT 0x1 +#define BOOT_DEVICE(x) (((x) >> BOOT_DEVICE_SHIFT) & BOOT_DEVICE_MASK) + +unsigned int boot_device(void); + #endif /* __SAMSUNG_MISC_COMMON_H__ */