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9cc3ad6c DD |
1 | How to use and build U-Boot on mx6sabresd: |
2 | ---------------------------------- | |
3 | ||
ce2f9def | 4 | Currently there are four methods for booting mx6sabresd boards: |
9cc3ad6c | 5 | |
ce2f9def | 6 | 1. Booting from SD card via normal U-Boot (u-boot.imx) |
9cc3ad6c | 7 | |
ce2f9def | 8 | 2. Booting from eMMC via normal U-Boot |
9cc3ad6c | 9 | |
ce2f9def | 10 | 3. Booting via SPL (SPL and u-boot.img) |
9cc3ad6c | 11 | |
ce2f9def | 12 | 4. Booting via Falcon mode (SPL launches the kernel directly) |
9cc3ad6c | 13 | |
ce2f9def BL |
14 | |
15 | 1. Booting from SD card via normal U-Boot | |
16 | ----------------------------------------- | |
9cc3ad6c DD |
17 | |
18 | $ make mx6qsabresd_defconfig (If you want to build for mx6qsabresd) | |
19 | ||
20 | or | |
21 | ||
22 | $ make mx6dlsabresd_defconfig (If you want to build for mx6dlsabresd) | |
23 | ||
24 | $ make | |
25 | ||
26 | This will generate the image called u-boot.imx. | |
27 | ||
28 | - Flash the u-boot.imx binary into the SD card: | |
29 | ||
30 | $ sudo dd if=u-boot.imx of=/dev/sdb bs=1K seek=1 && sync | |
31 | ||
32 | ||
ce2f9def BL |
33 | 2. Booting from eMMC via normal U-Boot |
34 | -------------------------------------- | |
35 | ||
36 | $ make mx6qsabresd_defconfig (If you want to build for mx6qsabresd) | |
37 | ||
38 | or | |
39 | ||
40 | $ make mx6dlsabresd_defconfig (If you want to build for mx6dlsabresd) | |
41 | ||
42 | $ make | |
43 | ||
44 | This will generate the image called u-boot.imx. | |
45 | ||
46 | - Flash the u-boot.imx binary into the eMMC: | |
47 | ||
48 | Set SW6 to download mode: 00001100 | |
49 | ||
50 | Plug a usb cable to USB-OTG and load the u-boot image using the imx_usb_loader | |
51 | tool (https://github.com/boundarydevices/imx_usb_loader): | |
52 | ||
53 | $ sudo ./imx_usb u-boot.imx | |
54 | ||
55 | In U-boot change the eMMC partition config: | |
56 | ||
57 | => mmc partconf 2 1 0 0 | |
58 | ||
59 | Mount the eMMC in the host PC: | |
60 | ||
61 | => ums 0 mmc 2 | |
62 | ||
63 | Flash the u-boot.imx binary | |
64 | ||
65 | $ sudo dd if=u-boot.imx of=/dev/sdX bs=1K seek=1 && sync | |
66 | ||
67 | Set SW6 to eMMC 8-bit boot: 11010110 | |
68 | ||
69 | ||
70 | 3. Booting via SPL | |
9cc3ad6c DD |
71 | ------------------ |
72 | ||
73 | Other method for building U-Boot on mx6qsabresd and mx6qpsabresd is | |
74 | through SPL. In order to do so: | |
75 | ||
76 | $ make mx6sabresd_spl_defconfig | |
77 | $ make | |
78 | ||
79 | This will generate the SPL image called SPL and the u-boot.img. | |
80 | ||
81 | - Flash the SPL image into the SD card: | |
82 | ||
83 | $ sudo dd if=SPL of=/dev/sdb bs=1K seek=1 && sync | |
84 | ||
85 | - Flash the u-boot.img image into the SD card: | |
86 | ||
87 | $ sudo dd if=u-boot.img of=/dev/sdbbs=1K seek=69 && sync | |
88 | ||
89 | ||
ce2f9def | 90 | 4. Booting via Falcon mode |
9cc3ad6c DD |
91 | -------------------------- |
92 | ||
93 | $ make mx6sabresd_spl_defconfig | |
94 | $ make | |
95 | ||
96 | This will generate the SPL image called SPL and the u-boot.img. | |
97 | ||
98 | - Flash the SPL image into the SD card: | |
99 | ||
100 | $ sudo dd if=SPL of=/dev/sdb bs=1K seek=1 oflag=sync status=none && sync | |
101 | ||
102 | - Flash the u-boot.img image into the SD card: | |
103 | ||
104 | $ sudo dd if=u-boot.img of=/dev/sdbbs=1K seek=69 oflag=sync status=none && sync | |
105 | ||
106 | Create a partition for root file system and extract it there: | |
107 | ||
108 | $ sudo tar xvf rootfs.tar.gz -C /media/root | |
109 | ||
110 | The SD card must have enough space for raw "args" and "kernel". | |
111 | To configure Falcon mode for the first time, on U-Boot do the following commands: | |
112 | ||
113 | - Setup the IP server: | |
114 | ||
115 | # setenv serverip <server_ip_address> | |
116 | ||
117 | - Download dtb file: | |
118 | ||
119 | # dhcp ${fdt_addr} imx6q-sabresd.dtb | |
120 | ||
121 | - Download kernel image: | |
122 | ||
123 | # dhcp ${loadaddr} uImage | |
124 | ||
125 | - Write kernel at 2MB offset: | |
126 | ||
127 | # mmc write ${loadaddr} 0x1000 0x4000 | |
128 | ||
129 | - Setup kernel bootargs: | |
130 | ||
131 | # setenv bootargs "console=ttymxc0,115200 root=/dev/mmcblk1p1 rootfstype=ext4 rootwait quiet rw" | |
132 | ||
133 | - Prepare args: | |
134 | ||
135 | # spl export fdt ${loadaddr} - ${fdt_addr} | |
136 | ||
137 | - Write args 1MB data (0x800 sectors) to 1MB offset (0x800 sectors) | |
138 | ||
139 | # mmc write 18000000 0x800 0x800 | |
140 | ||
141 | - Press KEY_VOL_UP key, power up the board and then SPL binary will | |
142 | launch the kernel directly. |