blob: bc0c0d0d1629577bbe2cb763d54798cb77bfdb71 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
|
How to use and build U-Boot on mx6sabresd:
----------------------------------
Currently there are four methods for booting mx6sabresd boards:
1. Booting from SD card via normal U-Boot (u-boot.imx)
2. Booting from eMMC via normal U-Boot
3. Booting via SPL (SPL and u-boot.img)
4. Booting via Falcon mode (SPL launches the kernel directly)
1. Booting from SD card via normal U-Boot
-----------------------------------------
$ make mx6qsabresd_defconfig (If you want to build for mx6qsabresd)
or
$ make mx6dlsabresd_defconfig (If you want to build for mx6dlsabresd)
$ make
This will generate the image called u-boot.imx.
- Flash the u-boot.imx binary into the SD card:
$ sudo dd if=u-boot.imx of=/dev/sdb bs=1K seek=1 && sync
2. Booting from eMMC via normal U-Boot
--------------------------------------
$ make mx6qsabresd_defconfig (If you want to build for mx6qsabresd)
or
$ make mx6dlsabresd_defconfig (If you want to build for mx6dlsabresd)
$ make
This will generate the image called u-boot.imx.
- Flash the u-boot.imx binary into the eMMC:
Set SW6 to download mode: 00001100
Plug a usb cable to USB-OTG and load the u-boot image using the imx_usb_loader
tool (https://github.com/boundarydevices/imx_usb_loader):
$ sudo ./imx_usb u-boot.imx
In U-boot change the eMMC partition config:
=> mmc partconf 2 1 0 0
Mount the eMMC in the host PC:
=> ums 0 mmc 2
Flash the u-boot.imx binary
$ sudo dd if=u-boot.imx of=/dev/sdX bs=1K seek=1 && sync
Set SW6 to eMMC 8-bit boot: 11010110
3. Booting via SPL
------------------
Other method for building U-Boot on mx6qsabresd and mx6qpsabresd is
through SPL. In order to do so:
$ make mx6sabresd_spl_defconfig
$ make
This will generate the SPL image called SPL and the u-boot.img.
- Flash the SPL image into the SD card:
$ sudo dd if=SPL of=/dev/sdb bs=1K seek=1 && sync
- Flash the u-boot.img image into the SD card:
$ sudo dd if=u-boot.img of=/dev/sdbbs=1K seek=69 && sync
4. Booting via Falcon mode
--------------------------
$ make mx6sabresd_spl_defconfig
$ make
This will generate the SPL image called SPL and the u-boot.img.
- Flash the SPL image into the SD card:
$ sudo dd if=SPL of=/dev/sdb bs=1K seek=1 oflag=sync status=none && sync
- Flash the u-boot.img image into the SD card:
$ sudo dd if=u-boot.img of=/dev/sdbbs=1K seek=69 oflag=sync status=none && sync
Create a partition for root file system and extract it there:
$ sudo tar xvf rootfs.tar.gz -C /media/root
The SD card must have enough space for raw "args" and "kernel".
To configure Falcon mode for the first time, on U-Boot do the following commands:
- Setup the IP server:
# setenv serverip <server_ip_address>
- Download dtb file:
# dhcp ${fdt_addr} imx6q-sabresd.dtb
- Download kernel image:
# dhcp ${loadaddr} uImage
- Write kernel at 2MB offset:
# mmc write ${loadaddr} 0x1000 0x4000
- Setup kernel bootargs:
# setenv bootargs "console=ttymxc0,115200 root=/dev/mmcblk1p1 rootfstype=ext4 rootwait quiet rw"
- Prepare args:
# spl export fdt ${loadaddr} - ${fdt_addr}
- Write args 1MB data (0x800 sectors) to 1MB offset (0x800 sectors)
# mmc write 18000000 0x800 0x800
- Press KEY_VOL_UP key, power up the board and then SPL binary will
launch the kernel directly.
|
