MSM http://blog.youkuaiyun.com/fybon/article/category/1841937
mtk http://blog.youkuaiyun.com/cbk861110/article/category/1513885
vold http://blog.youkuaiyun.com/column/details/android-usb.html
http://blog.youkuaiyun.com/new_abc/article/details/7396733
app http://blog.youkuaiyun.com/x605940745/article/category/1446169