This patch adds documentation for Odroid-XU3. This documentation is based on that of Odroid (doc/README-odroid) made by Przemyslaw Marczak. The documentation includes basic information about boot media layout, environment, partition layout, and the instruction to burn the u-boot image to boot media.
Signed-off-by: Hyungwon Hwang human.hwang@samsung.com Cc: Minkyu Kang mk7.kang@samsung.com Cc: Lukasz Majewski l.majewski@samsung.com --- Changes for v6: - Newly added
doc/README.odroid-xu3 | 134 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 134 insertions(+) create mode 100644 doc/README.odroid-xu3
diff --git a/doc/README.odroid-xu3 b/doc/README.odroid-xu3 new file mode 100644 index 0000000..8e1f333 --- /dev/null +++ b/doc/README.odroid-xu3 @@ -0,0 +1,134 @@ + U-boot for Odroid XU3 +======================== + +1. Summary +========== +This is a quick instruction for setup Odroid boards based on Exynos5422. +Exynos5422 is almost same with Exynos5800 which is a variant of Exynos5422 for +Chromebook. + +Board config: odroid-xu3_config + +2. Supported devices +==================== +This U-BOOT config can be used on the board: +- Odroid XU3 +with CPU Exynos 5422 and 2GB of RAM + +3. Boot sequence +================ +iROM->BL1->(BL2 + TrustZone)->U-BOOT + +To boot up, this version of U-BOOT needs BL1, BL2, and TrustZone binary. +It can be downloaded from: +https://github.com/hardkernel/u-boot/tree/odroidxu3-v2012.07/sd_fuse/hardker... + +4. Boot media layout +==================== +The table below shows SD/eMMC cards layout for U-boot. +The block offset is starting from 0 and the block size is 512B. + ------------------------------------- +| Binary | Block offset| part type | +| name | SD | eMMC |(eMMC only)| + ------------------------------------- +| Bl1 | 1 | 0 | 1 (boot) | +| Bl2 | 31 | 30 | 1 (boot) | +| U-boot | 63 | 62 | 1 (boot) | +| Tzsw | 2111 | 2110 | 1 (boot) | +| Uboot Env | 2500 | 2500 | 0 (user) | + ------------------------------------- + +5. Prepare the SD boot card - with SD card reader +================================================= +To prepare bootable media you need boot binaries provided by hardkernel. +The files from the link in point 3. +- bl1.bin.hardkernel +- bl2.bin.hardkernel +- tzsw.bin.hardkernel +- u-boot.bin.hardkernel + +This is all you need to boot this board. You can write the binaries to SD card +just by executiog sd_fusing.sh. You cannot use this script to write binaries to +eMMC card.It is valid only for SD card. + +*note +You cannot access the eMMC protected part (the first 8MB roughly) using an +ordinary eMMC reader. + +*note: +If you build u-boot by yourself, you will find u-boot.bin and u-boot-dtb.bin +as the build result. You have to use u-boot-dtb.bin instead of u-boot.bin. + +quick steps for Linux: +- Download all files from the link at point 3. +- put any SD card into the SD reader +- check the device with "dmesg" +- run ./sd_fusing.sh /dev/sdX - where X is SD card device (but not a partition) +Check if Hardkernel U-boot is booting, and next do the same with your U-boot. + +6. Prepare the eMMC boot card + with a eMMC card reader (boot from eMMC card slot) +===================================================== +To boot the device from the eMMC slot you should use a special card reader +which supports eMMC partition switch. All of the boot binaries are stored +on the eMMC boot partition which is normally hidden. + +The "sd_fusing.sh" script can be used after updating offsets of binaries +according to the table from point 4. Be sure that you are working on the right +eMMC partition - its size is usually very small, about 1-4 MiB. + +7. Prepare the eMMC boot card + with a SD card reader (boot from SD card slot) +================================================= +If you have an eMMC->microSD adapter you can prepare the card as in point 5. +But then the device can boot only from the SD card slot. + +8. Prepare the boot media using Hardkernel U-boot +================================================= +You can update the U-boot to the custom one if you have an working bootloader +delivered with the board on a eMMC/SD card. Then follow the steps: +- install the android fastboot tool +- connect a micro usb cable to the board +- on the U-boot prompt, run command: fastboot (as a root) +- on the host, run command: "fastboot flash bootloader u-boot-dtb.bin" +- the custom U-boot should start after the board resets. + +9. Partition layout +==================== +Default U-boot environment is setup for fixed partition layout. + +Partition table: MSDOS. Disk layout and files as listed in the table below. + ----- ------ ------ ------ -------- --------------------------------- +| Num | Name | FS | Size | Offset | Reguired files | +| | | Type | MiB | MiB | | + ----- ------ ------ ------ -------- --------------------------------- +| 1 | BOOT | fat | 100 | 2 | kernel, fdt** | +| 2 | ROOT | ext4 | - | | any Linux system | + ----- ------ ------ ------ -------- --------------------------------- + +**note: +Supported fdt files are: +- exynos5422-odroidxu3.dtb + +Supported kernel files are: +- Image.itb +- zImage +- uImage + +10. The environment and booting the kernel +========================================== +There are three macros defined in config for various boot options: +Two for both, kernel with device tree support and also without it: +- boot_uimg - load uImage +- boot_zimg - load zImage +If proper fdt file exists then it will be automatically loaded, +so for old kernel types, please remove fdt file from boot partition. + +The third boot option for multi image support (more info: doc/uImage.FIT/) +- boot_fit - for binary file: "Image.itb" + +Default boot command: "autoboot" +And the boot sequence is: +- boot_fit - if "Image.itb" exists +- boot_zimg - if "zImage" exists +- boot_uimg - if "uImage" exists