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不知道從何時 Linux Kernel 開始使用 Device Tree Blob. 在 Rockchip Project 裡 Device Tree Blob 被打包於 resource.img . 筆者這篇文章在此介紹如何打包/解包這 Rockchip 之 resource.img.
Build Rockchip Resource_tool
Rockchip resource_tool 原始碼位於 u-boot-rockchip Project 中 ( u-boot-rochchip/tools/resource_tool/ ) . 我們使用 git 把它 clone 下來.
$ git clone https://github.com/linux-rockchip/u-boot-rockchip ... $ make Arch=arm -C u-boot-rochchip/tools/resource_tool/ ...
如果編譯有誤, 用以下的方式修改 makefile 再編譯一次試試. 應該可以編譯成功.
$ sudo apt-get install gcc-arm-linux-gnueabihf ... $ sudo apt-get install g++-arm-linux-gnueabihf ...
$ sed "s/= gcc$/= gcc -I\/usr\/include\/x86_64-linux-gnu/" u-boot-rockchip/tools/resource_tool/Makefile > u-boot-rockchip/tools/resource_tool/makefile
$ make -C u-boot/tools/resource_tool/ clean
$ make -C u-boot/tools/resource_tool/ -f makefile
...
gcc -I/usr/include/x86_64-linux-gnu -c -o resource_tool.o resource_tool.c -fshort-wchar -m32 -ffunction-sections -Os
resource_tool.c: In function ‘get_file_size’:
resource_tool.c:333:5: warning: format ‘%d’ expects argument of type ‘int’, but argument 6 has type ‘__off_t’ [-Wformat=]
LOGD("path:%s, size:%d", path, st.st_size);
^
gcc -I/usr/include/x86_64-linux-gnu -c -o common.o common.c -fshort-wchar -m32 -ffunction-sections -Os
gcc -I/usr/include/x86_64-linux-gnu -c -o tests.o tests.c -fshort-wchar -m32 -ffunction-sections -Os
gcc -I/usr/include/x86_64-linux-gnu -o resource_tool resource_tool.o common.o tests.o -fshort-wchar -m32 -ffunction-sections -Os -Wl,--gc-sections -static
strip -s --remove-section=.note --remove-section=.comment resource_tool
make: Leaving directory `/home/jasonc/rk30-linux/u-boot/tools/resource_tool'
$
$ sudo cp u-boot-rockchip/tools/resource_tool/resource_tool /usr/local/bin/
...
Device Tree Compiler (DTC)
再來我們需要準備好 Device Tree Compiler. 在編譯 kernel 完成後, 可以找到 dtc 這個編譯器.
$ make ARCH=arm rk30x6_mini_defconfig ... $ make ARch=arm rk3066a-marsboard.img ...
$ find kernel -name dtc kernel/scripts/dtc kernel/scripts/dtc/dtc $ $ sudo cp kernel/scripts/dtc/dtc /usr/local/bin/
Unpack Resource.img
Kernel 編譯完成後會產生 kernel.img 以及 resource.img . 我們使用剛剛編譯好的 resource_tool 來 unpack 這個 resource.img , 如下:
$ mkdir -p out $ resource_tool --verbose --unpack --image=kernel/resource.img Dump header: partition version:0.0 header size:1 index tbl: offset:1 entry size:1 entry num:3 Dump Index table: entry(0): path:rk-kernel.dtb offset:4 size:33431 D/dump_file(192): try to dump entry:rk-kernel.dtb D/mkdirs(180): mkdir:out entry(1): path:logo.bmp offset:70 size:170326 D/dump_file(192): try to dump entry:logo.bmp D/mkdirs(180): mkdir:out entry(2): path:logo_kernel.bmp offset:403 size:19160 D/dump_file(192): try to dump entry:logo_kernel.bmp D/mkdirs(180): mkdir:out Unack upgrade_rk3066/Image/resource.img to out successed! $
可以看到 resource.img 裡面包含了 logo.bmp , logo_kernel.bmp 以及 rk-kernel.dtb (Device Tree Blob) .
$ ls out $ logo.bmp logo_kernel.bmp rk-kernel.dtb
Device Tree 反編譯
接下來我們使用 Device Tree Compiler (dtc) 反編譯這個 rk-kernel.dtb . `dtc` 這個指令如何使用, 請敲一下 `--help` 看一下.
$ dtc -help ...
$ dtc -I dtb -O dts out/rk-kernel.dtb -o out/rk-kernel.dts
反組譯後我們可以得到 `rk-kernel.dts` 檔案. 這個檔案就是 Device Tree Source File. 它的內容大概如下.
$ vi out/rk-kernel.dts
...
/dts-v1/;
/ {
#address-cells = <0x1>;
#size-cells = <0x1>;
interrupt-parent = <0x1>;
compatible = "chipspark,rayeager-px2", "rockchip,rk3066a";
model = "Rayeager PX2";
chosen {
bootargs = "console=ttyS2,1500000 androidboot.selinux=disabled init=/init initrd=0x62000000,0x00800000 root=/dev/rknand_rootfs rw rootwait mtdparts=rk29xxnand:0x00000800@0x00000800(misc),0x00004000@0x00001000(recovery),0x00000800@0x00005000(boot),0x00000800@0x00005800(resource),0x00002800@0x00006000(kernel),0x00007000@0x00008800(rootfs),0x0001E000@0x0000F800(rom),0x00004000@0x0002D800(emulator),-@0x00031800(data)";
};
aliases {
i2c0 = "/i2c@2002d000";
i2c1 = "/i2c@2002f000";
i2c2 = "/i2c@20056000";
i2c3 = "/i2c@2005a000";
i2c4 = "/i2c@2005e000";
mshc0 = "/dwmmc@1021c000";
mshc1 = "/dwmmc@10214000";
mshc2 = "/dwmmc@10218000";
serial0 = "/serial@10124000";
serial1 = "/serial@10126000";
serial2 = "/serial@20064000";
serial3 = "/serial@20068000";
spi0 = "/spi@20070000";
spi1 = "/spi@20074000";
};
...
Device Tree 編譯
已知 `rk-kernel.dts` or `rk3066a-marsboard.dts` , 要產生 Device Tree Blob, 可以使用下述命令:
$ dtc -I dts -O dtb out/rk-kernel.dts -o out/rk-kernel.dtb
或者我們有原始的 kernel Source Code,
$ make ARCH=arm -C kernel rk3066a-marsboard.dtb ... $ ls kernel/arch/arm/boot/dts/*.dtb $ kernel/arch/arm/boot/dts/rk3066a-marsboard.dtb ... $ /bin/cp kernel/arch/arm/boot/dts/rk3066a-marsboard.dtb out/rk-kernel.dtb
Pack Resource.img
已知 `logo.bmo` , `logo_kernel.bmp` 以及 `rk-kernel.dtb` , 要產生 resource.img . 我們使用下述命令:
$ resource_tool --verbose --pack out/logo.bmp out/logo_kernel.bmp out/rk-kernel.dtb resource.img && /bin/mv ./resource.img out/ D/main(112): try to pack 4 files. D/write_header(375): try to write header... D/write_index_tbl(391): try to write index table... D/get_file_size(327): try to get size(out/rk-kernel.dtb)... D/get_file_size(333): path:out/rk-kernel.dtb, size:33431 D/write_file(338): try to write file(out/rk-kernel.dtb) to offset:4... D/get_file_size(327): try to get size(out/rk-kernel.dtb)... D/get_file_size(333): path:out/rk-kernel.dtb, size:33431 D/write_index_tbl(409): try to write index entry(out/rk-kernel.dtb)... D/write_index_tbl(427): mod fdt path:out/rk-kernel.dtb -> rk-kernel.dtb... D/get_file_size(327): try to get size(out/logo_kernel.bmp)... D/get_file_size(333): path:out/logo_kernel.bmp, size:19160 D/write_file(338): try to write file(out/logo_kernel.bmp) to offset:70... D/get_file_size(327): try to get size(out/logo_kernel.bmp)... D/get_file_size(333): path:out/logo_kernel.bmp, size:19160 D/write_index_tbl(409): try to write index entry(out/logo_kernel.bmp)... D/get_file_size(327): try to get size(out/logo.bmp)... D/get_file_size(333): path:out/logo.bmp, size:170326 D/write_file(338): try to write file(out/logo.bmp) to offset:108... D/get_file_size(327): try to get size(out/logo.bmp)... D/get_file_size(333): path:out/logo.bmp, size:170326 D/write_index_tbl(409): try to write index entry(out/logo.bmp)... Pack to resource.img successed! $
Pack Recovery.img
筆者之前的文章其實已經介紹了如何 pack & repack recovery.img. 這邊我再簡單地重複一下:
DefConfig:
$ make ARCH=arm -C kernel rk30x6_mini_defconfig ...
zImage:
$ make ARCH=arm -C kernel zImage ...
DTB:
$ make ARCH=arm -C kernel rk3066a-marsboard.dtb ...
Pack Recovery.img:
$ cat kernel/arch/arm/boot/zImage arch/arm/boot/dts/rk3066a-marsboard.dtb > kernel/dkernel $ mkbootimg --kernel kernel/dkernel --ramdisk build/recovery/ramdisk-recovery.img --output out/recovery.img
Repack Recovery.img
Cpio & Unzip:
$ cd build/recovery/ $ mkdir -p unpacked-recovery $ cat ramdisk-recovery.img | gunzip | cpio -i ...
$ ls acct d drmboot.ko fstab.rk30board.bootmode.unknown init.rc property_contexts sdcard service_contexts tmp bugreports data etc fstab.unknown mnt res seapp_contexts storage ueventd.rc charger default.prop file_contexts.bin init oem rk30xxnand_ko.ko selinux_version sys ueventd.rk30board.rc config dev fstab.rk30board.bootmode.emmc init.bootmode.unknown.rc proc sbin sepolicy system vendor $
$ find . | cpio -o -H newc | gzip > ../ramdisk-recovery.img ; cd .. ...
$ mkbootimg --kernel kernel/dkernel --ramdisk build/recovery/ramdisk-recovery.img --output out/recovery.img
以 Linux Expect Script 自動輸入密碼 Fetch Remote Remote Repository
Remote Repository
假設 我的 Remote Projcet 如下:
$ git config --global user.email "lexra@example.com" $ git config --global user.name "Lexra Chang" $ repo init --repo-url ssh://git@www.rockchip.com.cn/repo/rk/tools/repo -u ssh://git@www.rockchip.com.cn/linux/rk/platform/manifests -b linux -m rk3288_linux_release.xml ...
Bin/Repo-Sync.exp
筆者之前碰到的問題是這樣:
repo init 兩個 --repo-url 似乎使得 repo sync 需要輸入兩次 Passphrase ; 而這兩次 Passphrase 常常來不及輸入.
$ .repo/repo/repo sync --force-sync kernel Enter passphrase for key '/home/jasonc/.ssh/id_rsa': Enter passphrase for key '/home/jasonc/.ssh/id_rsa':
因此筆者設計了一個 Expect Script 自動輸入密碼. 這 Expect Script (bin/repo-sync.exp) 的內容如下:
$ vi bin/repo-sync.exp
$ set timeout -1
set PARAM [lindex $argv 0]
spawn .repo/repo/repo sync --force-sync $PARAM
set times 0
while { $times < 9 } {
expect {
"Enter passphrase for key '/home/jasonc/.ssh/id_rsa':" { log_user 0; send "mypassword\r"; log_user 1; exp_continue }
eof { exit }
}
set times [ expr $times + 1]
}
exit
Expect Bin/Repo-Sync.exp Kernel
這個 Expect Script 需要一個參數.
jasonc@bebop:~/rk30-linux$ expect bin/repo-sync.exp kernel
spawn .repo/repo/repo sync --force-sync kernel
Enter passphrase for key '/home/jasonc/.ssh/id_rsa':
Enter passphrase for key '/home/jasonc/.ssh/id_rsa':
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = "en_US:en",
LC_ALL = (unset),
LC_PAPER = "zh_TW.UTF-8",
LC_ADDRESS = "zh_TW.UTF-8",
LC_MONETARY = "zh_TW.UTF-8",
LC_NUMERIC = "en_US.UTF-8",
LC_TELEPHONE = "zh_TW.UTF-8",
LC_MESSAGES = "en_US.UTF-8",
LC_IDENTIFICATION = "zh_TW.UTF-8",
LC_MEASUREMENT = "zh_TW.UTF-8",
LC_CTYPE = "en_US.UTF-8",
LC_TIME = "zh_TW.UTF-8",
LC_NAME = "zh_TW.UTF-8",
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Fetching project rk/kernel
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = "en_US:en",
LC_ALL = (unset),
LC_PAPER = "zh_TW.UTF-8",
LC_ADDRESS = "zh_TW.UTF-8",
LC_MONETARY = "zh_TW.UTF-8",
LC_NUMERIC = "en_US.UTF-8",
LC_TELEPHONE = "zh_TW.UTF-8",
LC_MESSAGES = "en_US.UTF-8",
LC_IDENTIFICATION = "zh_TW.UTF-8",
LC_MEASUREMENT = "zh_TW.UTF-8",
LC_CTYPE = "en_US.UTF-8",
LC_TIME = "zh_TW.UTF-8",
LC_NAME = "zh_TW.UTF-8",
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Fetching projects: 100% (1/1), done.
jasonc@bebop:~/rk30-linux$
Expect Bin/Repo-Sync.exp Sources/Meta-Openembedded
jasonc@bebop:~/rk30-linux$ expect bin/repo-sync.exp sources/meta-openembedded
spawn .repo/repo/repo sync --force-sync sources/meta-openembedded
Enter passphrase for key '/home/jasonc/.ssh/id_rsa':
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = "en_US:en",
LC_ALL = (unset),
LC_PAPER = "zh_TW.UTF-8",
LC_ADDRESS = "zh_TW.UTF-8",
LC_MONETARY = "zh_TW.UTF-8",
LC_NUMERIC = "en_US.UTF-8",
LC_TELEPHONE = "zh_TW.UTF-8",
LC_MESSAGES = "en_US.UTF-8",
LC_IDENTIFICATION = "zh_TW.UTF-8",
LC_MEASUREMENT = "zh_TW.UTF-8",
LC_CTYPE = "en_US.UTF-8",
LC_TIME = "zh_TW.UTF-8",
LC_NAME = "zh_TW.UTF-8",
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Fetching project meta-openembedded
Enter passphrase for key '/home/jasonc/.ssh/id_rsa':
Fetching projects: 100% (1/1), done.
jasonc@bebop:~/rk30-linux$
Expect Bin/Repo-Sync.exp Sources/Meta-Rockchip
jasonc@bebop:~/rk30-linux$ expect bin/repo-sync.exp sources/meta-rockchip
spawn .repo/repo/repo sync --force-sync sources/meta-rockchip
Enter passphrase for key '/home/jasonc/.ssh/id_rsa':
Enter passphrase for key '/home/jasonc/.ssh/id_rsa':
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = "en_US:en",
LC_ALL = (unset),
LC_PAPER = "zh_TW.UTF-8",
LC_ADDRESS = "zh_TW.UTF-8",
LC_MONETARY = "zh_TW.UTF-8",
LC_NUMERIC = "en_US.UTF-8",
LC_TELEPHONE = "zh_TW.UTF-8",
LC_MESSAGES = "en_US.UTF-8",
LC_IDENTIFICATION = "zh_TW.UTF-8",
LC_MEASUREMENT = "zh_TW.UTF-8",
LC_CTYPE = "en_US.UTF-8",
LC_TIME = "zh_TW.UTF-8",
LC_NAME = "zh_TW.UTF-8",
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Fetching project linux/yocto/meta-rockchip
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = "en_US:en",
LC_ALL = (unset),
LC_PAPER = "zh_TW.UTF-8",
LC_ADDRESS = "zh_TW.UTF-8",
LC_MONETARY = "zh_TW.UTF-8",
LC_NUMERIC = "en_US.UTF-8",
LC_TELEPHONE = "zh_TW.UTF-8",
LC_MESSAGES = "en_US.UTF-8",
LC_IDENTIFICATION = "zh_TW.UTF-8",
LC_MEASUREMENT = "zh_TW.UTF-8",
LC_CTYPE = "en_US.UTF-8",
LC_TIME = "zh_TW.UTF-8",
LC_NAME = "zh_TW.UTF-8",
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
Fetching projects: 100% (1/1), done.
jasonc@bebop:~/rk30-linux$
Git Branch --Set-Upstream-To
jasonc@bebop:~/rk30-linux/kernel-dmc$ git branch ...
jasonc@bebop:~/rk30-linux/kernel-dmc$ git checkout -b develop ...
jasonc@bebop:~/rk30-linux/kernel-dmc$ git checkout develop ...
jasonc@bebop:~/rk30-linux/kernel-dmc$ git branch --set-upstream-to=origin/develop develop ...
jasonc@bebop:~/rk30-linux/kernel-dmc$ git pull ...
jasonc@bebop:~/rk30-linux/kernel-dmc$ git status ...
jasonc@bebop:~/rk30-linux/kernel-dmc$ git push origin develop ...
之後只要 PULL PUSH, 這樣 develop branch 同步應該就不會有問題了.
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