1 U-Boot for Odroid X2/U3/XU3/XU4
2 ========================
6 This is a quick instruction for setup Odroid boards.
7 Board config: odroid_config for X2/U3
8 Board config: odroid-xu3_config for XU3/XU4
12 This U-BOOT config can be used on three boards:
15 with CPU Exynos 4412 rev 2.0 and 2GB of RAM
18 with CPU Exynos5422 and 2GB of RAM
22 iROM->BL1->(BL2 + TrustZone)->U-BOOT
24 This version of U-BOOT doesn't implement SPL. So, BL1, BL2, and TrustZone
25 binaries are needed to boot up.
28 It can be found in "boot.tar.gz" from here:
29 http://dev.odroid.com/projects/4412boot/wiki/FrontPage?action=download&value=boot.tar.gz
31 http://odroid.in/guides/ubuntu-lfs/boot.tar.gz
34 It can be downloaded from:
35 https://github.com/hardkernel/u-boot/tree/odroidxu3-v2012.07/sd_fuse/hardkernel_1mb_uboot
40 The table below shows SD/eMMC cards layout for U-Boot.
41 The block offset is starting from 0 and the block size is 512B.
42 -------------------------------------
43 | Binary | Block offset| part type |
44 | name | SD | eMMC |(eMMC only)|
45 -------------------------------------
46 | Bl1 | 1 | 0 | 1 (boot) |
47 | Bl2 | 31 | 30 | 1 (boot) |
48 | U-Boot | 63 | 62 | 1 (boot) |
49 | Tzsw | 2111 | 2110 | 1 (boot) |
50 | Uboot Env | 2560 | 2560 | 0 (user) |
51 -------------------------------------
53 5. Prepare the SD boot card - with SD card reader
54 =================================================
55 To prepare bootable media you need boot binaries provided by hardkernel.
56 From the downloaded files, You can find:
62 (The file names can be slightly different, but you can distinguish what they are
65 This is all you need to boot this board. But if you want to use your custom
66 U-Boot then you need to change u-boot.bin with your own U-Boot binary*
67 and run the script "sd_fusing.sh" - this script is valid only for SD card.
70 The proper binary file of current U-Boot is u-boot-dtb.bin.
72 quick steps for Linux:
73 - Download all files from the link at point 3 and extract it if needed.
74 - put any SD card into the SD reader
75 - check the device with "dmesg"
76 - run ./sd_fusing.sh /dev/sdX - where X is SD card device (but not a partition)
77 Check if Hardkernel U-Boot is booting, and next do the same with your U-Boot.
79 6. Prepare the eMMC boot card
80 with a eMMC card reader (boot from eMMC card slot)
81 =====================================================
82 To boot the device from the eMMC slot you should use a special card reader
83 which supports eMMC partition switch. All of the boot binaries are stored
84 on the eMMC boot partition which is normally hidden.
86 The "sd_fusing.sh" script can be used after updating offsets of binaries
87 according to the table from point 4. Be sure that you are working on the right
88 eMMC partition - its size is usually very small, about 1-4 MiB.
90 7. Prepare the eMMC boot card
91 with a SD card reader (boot from SD card slot)
92 =================================================
93 If you have an eMMC->microSD adapter you can prepare the card as in point 5.
94 But then the device can boot only from the SD card slot.
96 8. Prepare the boot media using Hardkernel U-Boot
97 =================================================
98 You can update the U-Boot to the custom one if you have a working bootloader
99 delivered with the board on the eMMC/SD card. Then follow the steps:
100 - install the android fastboot tool
101 - connect a micro usb cable to the board
102 - on the U-Boot prompt, run command: fastboot (as a root)
103 - on the host, run command: "fastboot flash bootloader u-boot-dtb.bin"
104 - the custom U-Boot should start after the board resets.
108 Default U-Boot environment is setup for fixed partition layout.
110 Partition table: MSDOS. Disk layout and files as listed in the table below.
111 ----- ------ ------ ------ -------- ---------------------------------
112 | Num | Name | FS | Size | Offset | Reguired files |
113 | | | Type | MiB | MiB | |
114 ----- ------ ------ ------ -------- ---------------------------------
115 | 1 | BOOT | fat | 100 | 2 | kernel, fdt** |
116 | 2 | ROOT | ext4 | - | | any Linux system |
117 ----- ------ ------ ------ -------- ---------------------------------
120 Supported fdt files are:
121 - exynos4412-odroidx2.dtb
122 - exynos4412-odroidu3.dtb
123 - exynos5422-odroidxu3.dtb
124 - exynos5422-odroidxu4.dtb
126 Supported kernel files are:
131 The default environmental variable "dfu_alt_info" is set* for above layout.
132 Each partition size is just an example, dfu_alt_info tries init two partitions.
133 The size of each is not important.
136 $dfu_alt_info is set on a boot time and it is concatenated using two variables:
137 - $dfu_alt_boot(set dynamically)
138 - $dfu_alt_system(from current env).
140 To add any changes to dfu_alt_info - please modify $dfu_alt_system only.
141 Changes are visible after board reset.
143 10. The environment and booting the kernel
144 ==========================================
145 There are three macros defined in config for various boot options:
146 Two for both, kernel with device tree support and also without it:
147 - boot_uimg - load uImage
148 - boot_zimg - load zImage
149 If proper fdt file exists then it will be automatically loaded,
150 so for old kernel types, please remove fdt file from boot partition.
152 The third boot option for multi image support (more info: doc/uImage.FIT/)
153 - boot_fit - for binary file: "Image.itb"
155 Default boot command: "autoboot"
156 And the boot sequence is:
157 - boot_fit - if "Image.itb" exists
158 - boot_zimg - if "zImage" exists
159 - boot_uimg - if "uImage" exists
163 NOTE: This section is only for Odroid X2/U3.
165 The ethernet can be accessed after starting the USB subsystem in U-Boot.
166 The adapter does not come with a preconfigured MAC address, and hence it needs
167 to be set before starting USB.
168 setenv usbethaddr 02:DE:AD:BE:EF:FF
170 Note that in this example a locally managed MAC address is chosen. Care should
171 be taken to make these MAC addresses unique within the same subnet.
173 Start the USB subsystem:
174 Odroid # setenv usbethaddr 02:DE:AD:BE:EF:FF
178 scanning bus 0 for devices... 4 USB Device(s) found
179 scanning usb for storage devices... 1 Storage Device(s) found
180 scanning usb for ethernet devices... 1 Ethernet Device(s) found
183 Automatic IP assignment:
184 ------------------------
185 If the ethernet is connected to a DHCP server (router maybe with DHCP enabled),
186 then the below will automatically assign an ip address through DHCP.
190 Odroid # setenv autoload no
192 Waiting for Ethernet connection... done.
194 DHCP client bound to address 192.168.1.10 (524 ms)
197 Note that this automatically sets the many IP address related variables in
198 U-Boot that is obtained from the DHCP server.
200 Odroid # printenv ipaddr netmask gatewayip dnsip
202 netmask=255.255.255.0
203 gatewayip=192.168.1.1
207 The ping command can be used a test to check connectivity. In this example,
208 192.168.1.27 is a pingable server in the network.
209 Odroid # ping 192.168.1.27
210 Waiting for Ethernet connection... done.
212 host 192.168.1.27 is alive
215 Static IP assignment:
216 ---------------------
217 In the case where there are no DHCP servers in the network, or you want to
218 set the IP address statically, it can be done by:
219 Odroid # setenv ipaddr 192.168.1.10
220 Odroid # ping 192.168.1.27
221 Waiting for Ethernet connection... done.
223 host 192.168.1.27 is alive
227 Say there exists a tftp server in the network with address 192.168.1.27 and
228 it serves a kernel image (zImage.3.17) and a DTB blob (exynos4412-odroidu3.dtb)
229 that needs to be loaded and booted. It can be accomplished as below:
230 (Assumes that you have setenv usbethaddr, and have not set autoload to no)
232 Odroid # setenv serverip 192.168.1.27
233 Odroid # tftpboot 0x40080000 zImage.3.17
234 Waiting for Ethernet connection... done.
236 TFTP from server 192.168.1.27; our IP address is 192.168.1.10
237 Filename 'zImage.3.17'.
238 Load address: 0x40080000
239 Loading: #################################################################
240 #################################################################
241 #################################################################
242 #######################
245 Bytes transferred = 3194200 (30bd58 hex)
246 Odroid # tftpboot 0x42000000 exynos4412-odroidu3.dtb
247 Waiting for Ethernet connection... done.
249 TFTP from server 192.168.1.27; our IP address is 192.168.1.10
250 Filename 'exynos4412-odroidu3.dtb'.
251 Load address: 0x42000000
255 Bytes transferred = 46935 (b757 hex)
256 Odroid # printenv bootargs
257 bootargs=Please use defined boot
258 Odroid # setenv bootargs console=ttySAC1,115200n8 root=/dev/mmcblk0p2 rootwait
259 Odroid # bootz 40080000 - 42000000
260 Kernel image @ 0x40080000 [ 0x000000 - 0x30bd58 ]
261 ## Flattened Device Tree blob at 42000000
262 Booting using the fdt blob at 0x42000000
263 Loading Device Tree to 4fff1000, end 4ffff756 ... OK
267 [ 0.000000] Booting Linux on physical CPU 0xa00
270 In the above example you can substitute 'dhcp' for 'tftpboot' as well.
274 Similarly we can use the USB storage to load the kernel image/initrd/fdt etc
275 and boot. For this example, there is a USB drive plugged in. It has a FAT
276 1st partition and an EXT 2nd partition. Using the generic FS (ls/load) makes
277 it even easier to work with FAT/EXT file systems.
278 For this example the second EXT partition is used for booting and as rootfs.
279 The boot files - kernel and the dtb are present in the /boot directory of the
285 scanning bus 0 for devices... 4 USB Device(s) found
286 scanning usb for storage devices... 1 Storage Device(s) found
287 scanning usb for ethernet devices...
288 Error: sms0 address not set. <----- Note the error as usbethaddr
289 Warning: failed to set MAC address <----- is not set.
290 1 Ethernet Device(s) found
293 Partition Map for USB device 0 -- Partition Type: DOS
295 Part Start Sector Num Sectors UUID Type
296 1 3072 263168 000c4046-01 06
297 2 266240 13457408 000c4046-02 83
299 Odroid # ls usb 0:2 /boot
304 101420 config-3.8.13.23
305 2127254 initrd.img-3.8.13.23
307 2194825 uInitrd-3.8.13.23
309 101448 config-3.8.13.26
310 2127670 uInitrd-3.8.13.26
311 2127606 initrd.img-3.8.13.26
312 3194200 zImage.3.17 <--- Kernel
313 46935 exynos4412-odroidu3.dtb <--- DTB
314 Odroid # load usb 0:2 40080000 /boot/zImage.3.17
315 3194200 bytes read in 471 ms (6.5 MiB/s)
316 Odroid # load usb 0:2 42000000 /boot/exynos4412-odroidu3.dtb
317 46935 bytes read in 233 ms (196.3 KiB/s)
318 Odroid # setenv bootargs console=ttySAC1,115200n8 root=/dev/sda2 rootwait
319 Odroid # bootz 40080000 - 42000000
320 Kernel image @ 0x40080000 [ 0x000000 - 0x30bd58 ]
321 ## Flattened Device Tree blob at 42000000
322 Booting using the fdt blob at 0x42000000
323 Loading Device Tree to 4fff1000, end 4ffff756 ... OK
327 [ 0.000000] Booting Linux on physical CPU 0xa00
329 Please refer to README.usb for additional information.