Shaojun Wang

Support Two USB Disks through USB Hub in Android

Discussion created by Shaojun Wang Employee on Oct 10, 2013

1. In device/fsl/imx6/sabresd/vold.fstab, change

    dev_mount udisk /mnt/udisk auto /devices/platform/fsl-ehci.0/usb1


    dev_mount udisk /mnt/udisk auto /devices/platform/fsl-ehci.0/usb1/1-1/1-1.4

    dev_mount udisk1 /mnt/udisk1 auto /devices/platform/fsl-ehci.0/usb1/1-1/1-1.1

    1-1 is usb hub device name in sysfs, 1-1.4 and 1-1.1 is usb hub port number in sysfs. You can get this number from kernel log when insert usb hub and usb disk.

2. In device/fsl/imx6/sabresd/overlay/frameworks/base/core/res/res/xml/storage_list.xm, add below code before </StorageList>.

    <storage android:mountPoint="/mnt/udisk1"



        android:removable="true" />


3. Apply below patch in device/fsl/imx6/etc/init.rc

    diff --git a/imx6/etc/init.rc b/imx6/etc/init.rc

    index b33b654..397b809

    --- a/imx6/etc/init.rc

    +++ b/imx6/etc/init.rc

    @@ -24,7 +24,7 @@ loglevel 3

         export LOOP_MOUNTPOINT /mnt/obb

         export SHM_MOUNTPOINT /mnt/shm

         export EXTERNAL_STORAGE /mnt/sdcard

    -    export SECONDARY_STORAGE /mnt/extsd:/mnt/udisk

    +   export SECONDARY_STORAGE /mnt/extsd:/mnt/udisk:/mnt/udisk1

         export BOOTCLASSPATH /system/framework/core.jar:/system/framework/core-junit.jar:/system/framework/bouncycastle.jar:/system/framework/ext.jar:/system/framework/framework.jar:/system/framework/


         export LIGHTSENSOR_PATH /sys/class/i2c-adapter/i2c-1/1-0044

     @@ -55,6 +55,8 @@ loglevel 3

         symlink /mnt/extsd /extsd

         mkdir /mnt/udisk 0000 system system

         symlink /mnt/udisk /udisk

    +   mkdir /mnt/udisk1 0000 system system

    +   symlink /mnt/udisk1 /udisk1

         mkdir /system

         mkdir /data 0771 system system

         mkdir /cache 0770 system cache