diff --git a/board/businesscard/v1/dts/businesscard.dts b/board/businesscard/v1/dts/businesscard.dts
index c04e5bc..a1749a9 100644
--- a/board/businesscard/v1/dts/businesscard.dts
+++ b/board/businesscard/v1/dts/businesscard.dts
@@ -47,13 +47,13 @@
 
             partition@0 {
                 label = "u-boot";
-                reg = <0x000000 0x80000>;
+                reg = <0x000000 0x40000>;
                 //read-only;
             };
 
             partition@110000 {
                 label = "rootubi";
-                reg = <0x80000 0x780000>;
+                reg = <0x40000 0x7C0000>;
                 //read-only;
             };
         };
diff --git a/board/businesscard/v1/flash.layout b/board/businesscard/v1/flash.layout
index 56647d0..6d9d0d8 100644
--- a/board/businesscard/v1/flash.layout
+++ b/board/businesscard/v1/flash.layout
@@ -1,2 +1,2 @@
-00000000:0007ffff uboot
-00080000:007fffff rootubi
+00000000:0003ffff uboot
+00040000:007fffff rootubi
diff --git a/board/businesscard/v1/genimage.cfg b/board/businesscard/v1/genimage.cfg
index 178a4fb..c55c467 100644
--- a/board/businesscard/v1/genimage.cfg
+++ b/board/businesscard/v1/genimage.cfg
@@ -12,7 +12,7 @@ image flash.bin {
 	flashtype = w25q64
 	partition uboot {
 		image = "u-boot-sunxi-with-spl.bin"
-		size = 512K
+		size = 256K
 	}
 	partition rootubi {
 		image = root.ubi
@@ -44,7 +44,7 @@ image flashdrive.img {
 
 image persist.ubifs {
 	ubifs {
-		extraargs = "--compr=zlib --jrn-size=64KiB --log-lebs=2"
+		extraargs = "--compr=zlib --jrn-size=192KiB --log-lebs=2"
 	}
 	size=1280K
 	flashtype = w25q64
diff --git a/board/businesscard/v1/uboot_defconfig b/board/businesscard/v1/uboot_defconfig
index 7996ffb..f6ea357 100644
--- a/board/businesscard/v1/uboot_defconfig
+++ b/board/businesscard/v1/uboot_defconfig
@@ -8,36 +8,42 @@ CONFIG_DRAM_CLK=156
 CONFIG_DRAM_ZQ=0
 # CONFIG_VIDEO_SUNXI is not set
 CONFIG_SPL_SPI_SUNXI=y
+# CONFIG_DISTRO_DEFAULTS is not set
+CONFIG_ENV_VARS_UBOOT_CONFIG=y
 # CONFIG_FIT is not set
 CONFIG_BOOTDELAY=0
+CONFIG_USE_BOOTCOMMAND=y
 CONFIG_BOOTCOMMAND="setenv bootargs console=ttyS0,115200 ubi.mtd=1 ubi.block=0,root ubi.block=0,flashdrive root=/dev/ubiblock0_2 g_acm_ms.removable=1; sf probe 0 20000000; ubi part rootubi; ubi read ${kernel_addr_r} kernel; ubi read ${fdt_addr_r} dtb; bootz ${kernel_addr_r} - ${fdt_addr_r}"
 CONFIG_LOG_MAX_LEVEL=6
 CONFIG_LOG_ERROR_RETURN=y
+CONFIG_SUPPORT_RAW_INITRD=y
 # CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR is not set
 CONFIG_SPL_MTD_SUPPORT=y
 # CONFIG_SPL_POWER_SUPPORT is not set
 CONFIG_SPL_RAM_SUPPORT=y
 CONFIG_SPL_RAM_DEVICE=y
+# CONFIG_SYS_LONGHELP is not set
+# CONFIG_CMD_BDI is not set
+# CONFIG_CMD_CONSOLE is not set
+CONFIG_CMD_BOOTZ=y
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_CRC32 is not set
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_GPT is not set
 # CONFIG_CMD_LOADB is not set
 # CONFIG_CMD_PINMUX is not set
 CONFIG_CMD_SF=y
-CONFIG_CMD_USB_SDP=y
-CONFIG_CMD_USB_MASS_STORAGE=y
+CONFIG_CMD_MTDPARTS=y
 CONFIG_MTDIDS_DEFAULT="nor0=spi-flash"
-CONFIG_MTDPARTS_DEFAULT="mtdparts=spi-flash:512k(uboot),-(rootubi)"
+CONFIG_MTDPARTS_DEFAULT="mtdparts=spi-flash:256k(uboot),-(rootubi)"
 CONFIG_CMD_LOG=y
 CONFIG_CMD_UBI=y
 # CONFIG_CMD_UBIFS is not set
-# CONFIG_SPL_DOS_PARTITION is not set
-# CONFIG_ISO_PARTITION is not set
-# CONFIG_SPL_EFI_PARTITION is not set
+# CONFIG_PARTITIONS is not set
 CONFIG_DEFAULT_DEVICE_TREE="businesscard"
-# CONFIG_ENV_IS_IN_FAT is not set
 # CONFIG_NET is not set
-# CONFIG_USB_FUNCTION_FASTBOOT is not set
-# CONFIG_MMC_HW_PARTITIONING is not set
+CONFIG_HAVE_BLOCK_DEVICE=y
+# CONFIG_MMC is not set
 CONFIG_MTD=y
 CONFIG_DM_SPI_FLASH=y
 CONFIG_SPI_FLASH=y
@@ -49,14 +55,11 @@ CONFIG_SPI_FLASH_MACRONIX=y
 CONFIG_SPI_FLASH_WINBOND=y
 # CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
 CONFIG_SPI_FLASH_MTD=y
-CONFIG_PHY_SUN4I_USB=y
 CONFIG_PINCTRL=y
 CONFIG_SPI=y
 CONFIG_DM_SPI=y
 CONFIG_SPI_SUNXI=y
-CONFIG_USB_MUSB_GADGET=y
-CONFIG_USB_GADGET_DOWNLOAD=y
 CONFIG_SYS_WHITE_ON_BLACK=y
-CONFIG_SHA1=y
-CONFIG_SHA256=y
-CONFIG_EFI_LOADER_HII=y
+CONFIG_HEXDUMP=y
+# CONFIG_OF_LIBFDT_OVERLAY is not set
+# CONFIG_EFI_LOADER is not set