A20csi接口的摄像头模块的移植
android系统源码里配置的是ov4560双摄像头，主要涉及到的文件有，sys_config.fex文件、camera.cfg文件、media_profiles.xml文件，其中sys_config.fex文件为摄像头驱动提供配置信息;camera.cfg和media_profile.xml文件为hal层提供配置信息。
另外相关的文件还有很多，下面一一说明：
首先要说的是android4.2.2/device/softwinner/wing-xxx\init.sun7i.rc文件，在该文件需要添加相应的驱动模块，
insmod /system/vendor/modules/gc0308.ko
然后，驱动层进行配置，在lichee\tools\pack\chips\sun7i\configs\android\wing-xxx的sys_config.fex中添加camera模组的自动检测列表
（摄像头驱动代码所在目录为/lichee/linux3.3/drivers/media/video/sunxi_csi/device/）
【camera_list_para】
camera_list_para_used = 1
gc0308 = 1
至于这个地方和摄像头的/dev/video0文件有什么联系，没搞清楚，只是知道当camera_list_para_used = 1时，ls /dev/目录下的文件没有生成摄像头的设备文件，打印的调试信息如下：
[camera_print][detect][L665]camera detect driver init
<4>[ 19.935008] [camera_print][detect][L176]fetch script data camera_list_para.camera_list_para_used fail
<4>[ 19.951067] [camera_print][detect][L672][camera_list_para] not exist in sys_config1.fex !!
<4>[ 19.966895] [camera_print][detect][L679]camera detector exit, it will do nothing ......
<6>[ 19.975730] init: command 'insmod' r=0
<4>[ 20.006715] init_sensor:init_sensor start
<6>[ 20.011685] init: command 'insmod' r=0
<6>[ 20.098594] [CSI]Welcome to CSI driver
<6>[ 20.102372] [CSI]csi_init
<6>[ 20.164610] [CSI]registered sub device,input_num = 0
<4>[ 20.170892] create_regulator: axp20_ldo3: Failed to create debugfs directory
<4>[ 20.178131] create_regulator: axp20_ldo4: Failed to create debugfs directory
<6>[ 20.186302] [CSI]power on and standy on camera 0!
<6>[ 20.341966] [CSI]V4L2 device registered as video0
当camera_list_para_used = 0时，可以看到/dev/目录下生成了摄像头的设备文件video0，调试打印信息如下：
<4>[ 16.473644] [camera_print][detect][L665]camera detect driver init
<4>[ 16.487590] [camera_print][detect][L171]csi0_para.csi_dev_qty=1
<4>[ 16.493560] [camera_print][detect][L171]csi0_para.csi_twi_id=1
<4>[ 16.522183] [camera_print][detect][L171]csi0_para.csi_facing=1
<4>[ 16.537087] [camera_print][detect][L193]csi0_para.csi_reset gpio=180,mul_sel=1,data:0
<4>[ 16.552586] [camera_print][detect][L198]fetch script data csi0_para.csi_power_en fail
<4>[ 16.564971] [camera_print][detect][L193]csi0_para.csi_stby gpio=183,mul_sel=1,data:1
<4>[ 16.572742] [camera_print][detect][L198]fetch script data csi0_para.csi_af_en fail
<4>[ 16.604853] [camera_print][detect][L207]csi0_para.csi_iovdd=axp20_pll
<4>[ 16.611519] [camera_print][detect][L207]csi0_para.csi_avdd=
<4>[ 16.627648] [camera_print][detect][L207]csi0_para.csi_dvdd=
<4>[ 16.633311] create_regulator: axp20_ldo3: Failed to create debugfs directory
<4>[ 16.655004] [camera_print][detect][L418]camera_list_size: 20
<4>[ 16.660811] [camera_print][detect][L423]modules: gc0308 need detect!!
<4>[ 16.675036] [camera_print][detect][L108]camera_mclk_open !!
<4>[ 16.680720] [camera_print][detect][L438]camera_diff_i2c_id_detect!!
<4>[ 16.695589] [camera_print][list][L28]OSAL_GPIO_Request ok, gpio_name=csi_stby, gpio=183,mul_sel=1
<4>[ 16.711500] [camera_print][list][L28]OSAL_GPIO_Request ok, gpio_name=csi_reset, gpio=180,mul_sel=1
<4>[ 16.758797] [camera_print][list][L28]OSAL_GPIO_Request ok, gpio_name=csi_stby, gpio=183,mul_sel=1
<4>[ 16.806177] [camera_print][list][L28]OSAL_GPIO_Request ok, gpio_name=csi_reset, gpio=180,mul_sel=1
<4>[ 16.865776] [camera_print][list][L28]OSAL_GPIO_Request ok, gpio_name=csi_reset, gpio=180,mul_sel=1
<4>[ 16.886280] [camera_print][list][L445]try to detect gc0308 ...
<4>[ 16.892248] [camera_print][list][L137]reg[0]:254->data[0]:254
<4>[ 16.903653] [camera_print][list][L141]value[0]:0->data[1]:0
<4>[ 16.909450] [i2c1] START can't sendout!
<4>[ 16.913291] [i2c1] Retrying transmission 2
<4>[ 16.923127] [i2c1] START can't sendout!
<4>[ 16.927062] [i2c1] Retrying transmission 1
<4>[ 16.931431] [i2c1] START can't sendout!
<4>[ 16.940253] [i2c1] Retrying transmission 0
<4>[ 16.944518] [camera_print][ERR][L155]sensor_write error!, error number: -121
<4>[ 16.951796] [camera_print][ERR][L457]detect camera fail in func: camera_diff_i2c_id_detect !!
<4>[ 16.964989] [camera_print][detect][L133]camera_mclk_close !!
<6>[ 16.971096] init: command 'insmod' r=0
<4>[ 16.993154] init_sensor:init_sensor start
<6>[ 16.999455] init: command 'insmod' r=0
<5>[ 17.003921] init: starting 'bootanim'
<6>[ 17.085795] [CSI]Welcome to CSI driver
<6>[ 17.089570] [CSI]csi_init
<3>[ 17.097474] i2c i2c-1: Invalid 7-bit I2C address 0x00
<6>[ 17.102551] [CSI_ERR]Error registering v4l2 subdevice,input_num = 0
<6>[ 17.115128] [CSI_ERR]failed to install
<6>[ 17.119379] init: command 'insmod' r=0
而且当点击android界面上的相机时，打印如下调试信息：
可以查找到i2c的调试信息，是由i2c_sun7i.c文件打印，摄像头的调试信息为gc0308.c文件打印，只不过虽然找到了错误的地方，知道I2C通讯失败，地址也不对，但是在sys_config.fex文件里明明配置地址为0x42了，但是让然不知道究竟错在哪里，如有大神看到还请不吝赐教，在此表示深深感谢，，，