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arm: exynos: Read default MMC device from XOM[7:5] pins

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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>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Marek Szyprowski 2020-01-17 14:02:44 +01:00 • committed by Minkyu Kang
parent da63b5da61
commit 86c8871108
4 changed files with 31 additions and 0 deletions
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1
arch/arm/mach-exynos/include/mach/cpu.h
View file

@ -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

28
board/samsung/common/board.c
View file

@ -25,6 +25,8 @@
#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>
@ -43,6 +45,20 @@ __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)
@ -281,6 +297,8 @@ 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);
@ -293,6 +311,11 @@ 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
@ -360,3 +383,8 @@ 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();
}

1
configs/odroid-xu3_defconfig
View file

@ -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

1
configs/odroid_defconfig
View file

@ -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