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@@ -25,6 +25,8 @@
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#include <asm/arch/sromc.h>
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#include <lcd.h>
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#include <i2c.h>
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+#include <mmc.h>
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+#include <stdio_dev.h>
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#include <usb.h>
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#include <dwc3-uboot.h>
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#include <samsung/misc.h>
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@@ -43,6 +45,20 @@ __weak int exynos_power_init(void)
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return 0;
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}
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+/**
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+ * get_boot_mmc_dev() - read boot MMC device id from XOM[7:5] pins.
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+ */
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+static int get_boot_mmc_dev(void)
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+{
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+ u32 mode = readl(EXYNOS4_OP_MODE) & 0x1C;
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+
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+ if (mode == 0x04)
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+ return 2; /* MMC2: SD */
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+
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+ /* MMC0: eMMC or unknown */
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+ return 0;
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+}
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+
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#if defined CONFIG_EXYNOS_TMU
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/* Boot Time Thermal Analysis for SoC temperature threshold breach */
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static void boot_temp_check(void)
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@@ -281,6 +297,8 @@ int board_late_init(void)
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{
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struct udevice *dev;
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int ret;
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+ int mmcbootdev = get_boot_mmc_dev();
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+ char mmcbootdev_str[16];
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stdio_print_current_devices();
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ret = uclass_first_device_err(UCLASS_CROS_EC, &dev);
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@@ -293,6 +311,11 @@ int board_late_init(void)
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panic("Cannot init cros-ec device");
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return -1;
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}
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+
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+ printf("Boot device: MMC(%u)\n", mmcbootdev);
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+ sprintf(mmcbootdev_str, "%u", mmcbootdev);
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+ env_set("mmcbootdev", mmcbootdev_str);
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+
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return 0;
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}
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#endif
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@@ -360,3 +383,8 @@ int board_usb_cleanup(int index, enum usb_init_type init)
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#endif
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return 0;
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}
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+
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+int mmc_get_env_dev(void)
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+{
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+ return get_boot_mmc_dev();
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+}
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