On Wed, 15 Jan 2020 15:05:58 +0100 Marek Szyprowski <m.szyprow...@samsung.com> wrote:
> 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.szyprow...@samsung.com>
> ---
> arch/arm/mach-exynos/include/mach/cpu.h | 1 +
> board/samsung/common/board.c | 14 ++++++++++++++
> 2 files changed, 15 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..ac91c0a6fb 100644
> --- a/board/samsung/common/board.c
> +++ b/board/samsung/common/board.c
> @@ -359,3 +359,17 @@ int board_usb_cleanup(int index, enum
> usb_init_type init) #endif
> return 0;
> }
> +
> +/**
> + * mmc_get_env_dev() - read boot MMC device id from XOM[7:5] pins.
> + */
> +int mmc_get_env_dev(void)
> +{
> + u32 mode = readl(EXYNOS4_OP_MODE) & 0x1C;
> +
> + if (mode == 0x04)
> + return 2; /* MMC2: SD */
> +
> + /* MMC0: eMMC or unknown */
> + return 0;
> +}
Reviewed-by: Lukasz Majewski <lu...@denx.de>
Best regards,
Lukasz Majewski
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lu...@denx.de
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