AM335x Android eMMC mkmmc-android.sh hacking

#                   AM335x Android eMMC mkmmc-android.sh hacking

#

# . 有空解读一下android的分区文件。

# . 代码来源：https://github.com/hendersa/bbbandroid-external-ti_android_utilities/blob/master/am335x/mk-mmc/mkmmc-android.sh

#

#                                          -- 深圳 南山平山村 曾剑锋

#!/bin/bash

# 如果参数只有一个，这里就会使用默认文件夹下的程序，mkmmc-android.sh会重新调用，执行完再退出

EXPECTED_ARGS=

if [ $# == $EXPECTED_ARGS ]

then

    echo "Assuming Default Locations for Prebuilt Images"

    $ $ Boot_Images/MLO Boot_Images/u-boot.img Boot_Images/zImage Boot_Images/uEnv.txt Boot_Images/dtbs/am335x-boneblack.dtb Filesystem/rootfs* Media_Clips START_HERE

    exit

fi

# 六个参数，一个都不能少

if [[ -z $ || -z $ || -z $ || -z $ || -z $ || -z $ ]]

then

    echo "mkmmc-android Usage:"

    echo "  mkmmc-android <device> <MLO> <u-boot.img> <zImage> <uEnv.txt> <am335x-boneblack.dtb> <rootfs tar.bz2> <Optional Media_Clips> <Optional START_HERE folder>"

    echo "  Example: mkmmc-android /dev/sdc MLO u-boot.img zImage uEnv.txt am335x-boneblack.dtb rootfs.tar.bz2 Media_Clips START_HERE"

    exit

fi

# 判断文件是否存在

if ! [[ -e $ ]]

then

    echo "Incorrect MLO location!"

    exit

fi

if ! [[ -e $ ]]

then

    echo "Incorrect u-boot.img location!"

    exit

fi

if ! [[ -e $ ]]

then

    echo "Incorrect zImage location!"

    exit

fi

if ! [[ -e $ ]]

then

    echo "Incorrect uEnv.txt location!"

    exit

fi

if ! [[ -e $ ]]

then

    echo "Incorrect am335x-boneblack.dtb!"

    exit

fi

if ! [[ -e $ ]]

then

    echo "Incorrect rootfs location!"

    exit

fi

# 提示信息

echo "All data on "$" now will be destroyed! Continue? [y/n]"

read ans

if ! [ $ans == 'y' ]

then

    exit

fi

# 卸载所有$1分区挂载

echo "[Unmounting all existing partitions on the device ]"

umount $*

echo "[Partitioning $1...]"

# 擦除分区表

DRIVE=$

dd if=/dev/zero of=$DRIVE bs= count= &>/dev/null

# 获取eMMC相关信息

SIZE=`fdisk -l $DRIVE | grep Disk | awk '{print $5}'`

echo DISK SIZE - $SIZE bytes

CYLINDERS=`echo $SIZE/// | bc`

# 分区，并设置boot分区

echo CYLINDERS - $CYLINDERS

{

echo ,,0x0C,*

echo ,$(expr $CYLINDERS / ),,-

echo ,$(expr $CYLINDERS / ),,-

echo ,,0x0C,-

} | sfdisk -D -H  -S  -C $CYLINDERS $DRIVE &> /dev/null

echo "[Making filesystems...]"

if [[ ${DRIVE} == /dev/*mmcblk* ]]

then

    DRIVE=${DRIVE}p

fi

# 格式化分区

mkfs.vfat -F 32 -n boot ${DRIVE}1 &> /dev/null

mkfs.ext4 -L rootfs ${DRIVE}2 &> /dev/null

mkfs.ext4 -L usrdata ${DRIVE}3 &> /dev/null

mkfs.vfat -F 32 -n data ${DRIVE}4 &> /dev/null

echo "[Copying files...]"

# 挂载并拷贝文件到分区1

mount ${DRIVE}1 /mnt

cp $2 /mnt/MLO

cp $3 /mnt/u-boot.img

cp $4 /mnt/zImage

cp $5 /mnt/uEnv.txt

mkdir /mnt/dtbs

cp $6 /mnt/dtbs/am335x-boneblack.dtb

if [ "$9" ]

then

        echo "[Copying START_HERE folder to boot partition]"

        cp -r $9 /mnt/START_HERE

fi

# 卸载分区

umount ${DRIVE}1

# 拷贝文件系统内容到分区2

mount ${DRIVE}2 /mnt

tar jxvf $7 -C /mnt &> /dev/null

chmod 755 /mnt

umount ${DRIVE}2

# 拷贝data到数据分区

if [ "$8" ]

then

    echo "[Copying all clips to data partition]"

    mount ${DRIVE}4 /mnt

    cp -r $8/* /mnt/

    umount ${DRIVE}4

fi

echo "[Done]"