The DFU protocol implementation in U-Boot is much faster than the FEL protocol implementation in the boot ROM on Allwinner devices. Using DFU instead of FEL improves the USB transfer speed from 500-900 KB/s to 3.2-3.7 MB/s. This is particularly useful for reducing the time needed for booting systems with large initrd images.
FEL is still useful for loading the U-Boot bootloader and a boot script, which may then activate DFU in the following way:
setenv dfu_alt_info ${dfu_alt_info_ram} dfu 0 ram 0 bootm ${kernel_addr_r} ${ramdisk_addr_r} ${fdt_addr_r}
The rest of the files can be transferred to the device using the "dfu-util" tool.
Signed-off-by: Siarhei Siamashka siarhei.siamashka@gmail.com --- include/configs/sunxi-common.h | 30 +++++++++++++++++++++++++----- 1 file changed, 25 insertions(+), 5 deletions(-)
diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h index ddcfe94..38c0bc5 100644 --- a/include/configs/sunxi-common.h +++ b/include/configs/sunxi-common.h @@ -337,6 +337,7 @@ extern int soft_i2c_gpio_scl; #define CONFIG_USB_GADGET_VBUS_DRAW 0
#define CONFIG_USB_GADGET_DOWNLOAD +#define CONFIG_USB_FUNCTION_DFU #define CONFIG_USB_FUNCTION_FASTBOOT #define CONFIG_USB_FUNCTION_MASS_STORAGE #endif @@ -347,6 +348,11 @@ extern int soft_i2c_gpio_scl; #define CONFIG_G_DNL_MANUFACTURER "Allwinner Technology" #endif
+#ifdef CONFIG_USB_FUNCTION_DFU +#define CONFIG_CMD_DFU +#define CONFIG_DFU_RAM +#endif + #ifdef CONFIG_USB_FUNCTION_FASTBOOT #define CONFIG_CMD_FASTBOOT #define CONFIG_FASTBOOT_BUF_ADDR CONFIG_SYS_LOAD_ADDR @@ -394,13 +400,26 @@ extern int soft_i2c_gpio_scl; * 32M uncompressed kernel, 16M compressed kernel, 1M fdt, * 1M script, 1M pxe and the ramdisk at the end. */ + +#define KERNEL_ADDR_R __stringify(SDRAM_OFFSET(2000000)) +#define FDT_ADDR_R __stringify(SDRAM_OFFSET(3000000)) +#define SCRIPT_ADDR_R __stringify(SDRAM_OFFSET(3100000)) +#define PXEFILE_ADDR_R __stringify(SDRAM_OFFSET(3200000)) +#define RAMDISK_ADDR_R __stringify(SDRAM_OFFSET(3300000)) + #define MEM_LAYOUT_ENV_SETTINGS \ "bootm_size=0xa000000\0" \ - "kernel_addr_r=" __stringify(SDRAM_OFFSET(2000000)) "\0" \ - "fdt_addr_r=" __stringify(SDRAM_OFFSET(3000000)) "\0" \ - "scriptaddr=" __stringify(SDRAM_OFFSET(3100000)) "\0" \ - "pxefile_addr_r=" __stringify(SDRAM_OFFSET(3200000)) "\0" \ - "ramdisk_addr_r=" __stringify(SDRAM_OFFSET(3300000)) "\0" + "kernel_addr_r=" KERNEL_ADDR_R "\0" \ + "fdt_addr_r=" FDT_ADDR_R "\0" \ + "scriptaddr=" SCRIPT_ADDR_R "\0" \ + "pxefile_addr_r=" PXEFILE_ADDR_R "\0" \ + "ramdisk_addr_r=" RAMDISK_ADDR_R "\0" + +#define DFU_ALT_INFO_RAM \ + "dfu_alt_info_ram=" \ + "kernel ram " KERNEL_ADDR_R " 0x1000000;" \ + "fdt ram " FDT_ADDR_R " 0x100000;" \ + "ramdisk ram " RAMDISK_ADDR_R " 0x4000000\0"
#ifdef CONFIG_MMC #define BOOT_TARGET_DEVICES_MMC(func) func(MMC, mmc, 0) @@ -482,6 +501,7 @@ extern int soft_i2c_gpio_scl; #define CONFIG_EXTRA_ENV_SETTINGS \ CONSOLE_ENV_SETTINGS \ MEM_LAYOUT_ENV_SETTINGS \ + DFU_ALT_INFO_RAM \ "fdtfile=" CONFIG_DEFAULT_DEVICE_TREE ".dtb\0" \ "console=ttyS0,115200\0" \ BOOTCMD_SUNXI_COMPAT \