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100ASK_V853-PRO开发板支持4LINE的MIPI摄像头和2LINE的MIPI摄像头，使用百问网提供的Tina SDK包生成的镜像，系统已经配置好了，可以直接使用。本章介绍如何去适配一个MIPI摄像头，本文所用的2LINE的MIPI摄像头，大家可以在百问网官方淘宝店铺上购买。100ASK_V853-PRO开发板
(资料图片)
全志LinuxTina-SDK开发完全手册：https://tina.100ask.net/
如果您想适配自己的摄像头，强烈建议您参照以下开发指南进行操作：
Camera_开发指南：https://tina.100ask.net/SdkModule/Linux_Camera_DevelopmentGuide-01/
V853支持并口CSI、MIPI，使用VIN camera驱动框架。
Camera 通路框架
• VIN 支持灵活配置单/双路输入双ISP 多通路输出的规格
• 引入media 框架实现pipeline 管理
• 将libisp 移植到用户空间解决GPL 问题
• 将统计buffer 独立为v4l2 subdev
• 将的scaler（vipp）模块独立为v4l2 subdev
• 将video buffer 修改为mplane 方式，使用户层取图更方便
• 采用v4l2-event 实现事件管理
• 采用v4l2-controls 新特性
VIN 框架
• 使用过程中可简单的看成是vin 模块+ device 模块+af driver + flash 控制模块的方式；
• vin.c 是驱动的主要功能实现，包括注册/注销、参数读取、与v4l2 上层接口、与各device 的下层接口、中断处理、buffer 申请切换等；
• modules/sensor 文件夹里面是各个sensor 的器件层实现，一般包括上下电、初始化，各分辨率切换，yuv sensor 包括绝大部分的v4l2 定义的ioctrl 命令的实
现；而raw sensor 的话大部分ioctrl 命令在vin 层调用isp 库实现，少数如曝光/增益调节会透过vin 层到实际器件层；
• modules/actuator 文件夹内是各种vcm 的驱动；
• modules/flash 文件夹内是闪光灯控制接口实现；
• vin-csi 和vin-mipi 为对csi 接口和mipi 接口的控制文件；
• vin-isp 文件夹为isp 的库操作文件；
• vin-video 文件夹内主要是video 设备操作文件；
驱动路径位于linux-4.9/drivers/media/platform/sunxi-vin 下。
sunxi-vin:│ vin.c ;v4l2驱动实现主体（包含视频接口和ISP部分）│ vin.h ;v4l2驱动头文件│ top_reg.c ;vin对各v4l2 subdev管理接口实现主体│ top_reg.h ;管理接口头文件│ top_reg_i.h ;vin模块接口层部分结构体├── modules│ ├── actuator ;vcm driver│ │ ├── actuator.c│ │ ├── actuator.h│ │ ├── dw9714_act.c│ │ ├── Makefile│ ├── flash ;闪光灯driver│ │ ├── flash.c│ │ └── flash.h│ └── sensor ;sensor driver│ ├── ar0144_mipi.c│ ├── camera_cfg.h ;camera ioctl扩展命令头文件│ ├── camera.h ;camera公用结构体头文件│ ├── Makefile│ ├── ov2775_mipi.c│ ├── ov5640.c│ ├── sensor-compat-ioctl32.c│ ├── sensor_helper.c ;sensor公用操作接口函数文件│ ├── sensor_helper.h├── platform ;平台相关的配置接口├── utility│ ├── bsp_common.c│ ├── bsp_common.h│ ├── cfg_op.c│ ├── cfg_op.h│ ├── config.c│ ├── config.h│ ├── sensor_info.c│ ├── sensor_info.h│ ├── vin_io.h│ ├── vin_os.c│ ├── vin_os.h│ ├── vin_supply.c│ └── vin_supply.h├── vin-cci│ ├── sunxi_cci.c│ └── sunxi_cci.h├── vin-csi│ ├── parser_reg.c│ ├── parser_reg.h│ ├── parser_reg_i.h│ ├── sunxi_csi.c│ └── sunxi_csi.h├── vin-isp│ ├── sunxi_isp.c│ └── sunxi_isp.h├── vin-mipi│ ├── sunxi_mipi.c│ └── sunxi_mipi.h├── vin-stat│ ├── vin_h3a.c│ ├── vin_h3a.h│ ├── vin_ispstat.c│ └── vin_ispstat.h├── vin_test├── vin-video│ ├── vin_core.c│ ├── vin_core.h│ ├── vin_video.c│ └── vin_video.h└── vin-vipp├── sunxi_scaler.c├── sunxi_scaler.h├── vipp_reg.c├── vipp_reg.h└── vipp_reg_i.h 100ASK_V853-PRO开发板支持4LINE双摄镜头模组和2LINE单摄镜头模组，下面我仅演示2LINE的MIPI摄像头如何进行配置。我们使用的是GC2053摄像头，使用的是全志已经内置的驱动程序，路径为：
kernel/linux-4.9/drivers/media/platform/sunxi-vin/modules/sensor/gc2053_mipi.c设备树配置路径：
device/config/chips/v853/configs/100ask/board.dtscamera相关配置：
vind0:vind@0 { vind0_clk = <300000000>; status = "okay"; csi2:csi@2 { pinctrl-names = "default","sleep"; pinctrl-0 = <&ncsi_pins_a>; pinctrl-1 = <&ncsi_pins_b>; status = "okay"; }; /*Online mode tp9953 uses online mode*/ tdm0:tdm@0 { work_mode = <0>; }; isp00:isp@0 { work_mode = <0>; }; scaler00:scaler@0 { work_mode = <0>; }; scaler10:scaler@4 { work_mode = <0>; }; scaler20:scaler@8 { work_mode = <0>; }; scaler30:scaler@12 { work_mode = <0>; }; actuator0:actuator@0 { device_type = "actuator0"; actuator0_name = "ad5820_act"; actuator0_slave = <0x18>; actuator0_af_pwdn = <>; actuator0_afvdd = "afvcc-csi"; actuator0_afvdd_vol = <2800000>; status = "disabled"; }; flash0:flash@0 { device_type = "flash0"; flash0_type = <2>; flash0_en = <>; flash0_mode = <>; flash0_flvdd = ""; flash0_flvdd_vol = <>; status = "disabled"; }; sensor0:sensor@0 { device_type = "sensor0"; sensor0_mname = "gc2053_mipi"; sensor0_twi_cci_id = <1>; sensor0_twi_addr = <0x6e>; sensor0_mclk_id = <0>; sensor0_pos = "rear"; sensor0_isp_used = <1>; sensor0_fmt = <1>; sensor0_stby_mode = <0>; sensor0_vflip = <0>; sensor0_hflip = <0>; sensor0_iovdd-supply = <®_aldo2>; sensor0_iovdd_vol = <1800000>; sensor0_avdd-supply = <®_bldo2>; sensor0_avdd_vol = <2800000>; sensor0_dvdd-supply = <®_dldo2>; sensor0_dvdd_vol = <1200000>; sensor0_power_en = <>; sensor0_reset = <&pio PA 18 1 0 1 0>; sensor0_pwdn = <&pio PA 19 1 0 1 0>; sensor0_sm_hs = <>; sensor0_sm_vs = <>; flash_handle = <&flash0>; act_handle = <&actuator0>; status = "okay"; }; sensor1:sensor@1 { device_type = "sensor1"; sensor1_mname = "tp9953"; sensor1_twi_cci_id = <0>; sensor1_twi_addr = <0x88>; sensor1_mclk_id = <2>; sensor1_pos = "front"; sensor1_isp_used = <0>; sensor1_fmt = <0>; sensor1_stby_mode = <0>; sensor1_vflip = <0>; sensor1_hflip = <0>; sensor1_iovdd-supply = <®_aldo2>; sensor1_iovdd_vol = <1800000>; sensor1_avdd-supply = <>; /*<®_dcdc1>;*/ sensor1_avdd_vol = <3300000>; sensor1_dvdd-supply = <>;//<®_dldo2>; sensor1_dvdd_vol = <1200000>; sensor1_power_en = <&pio PI 0 1 0 1 0>; sensor1_reset = <&pio PH 13 1 0 1 0>; sensor1_pwdn = <>; /*sensor1_pwdn = <&pio PE 13 1 0 1 0>;*/ sensor1_sm_hs = <>; sensor1_sm_vs = <>; flash_handle = <>; act_handle = <>; status = "okay"; };在Tina根目录下执行make kernel_menuconfig
book@100ask:~/workspaces/tina-v853-open$ make kernel_menuconfig注意:在进行内核配置前需要配置环境变量才可以进入内核调试，即在配置前输入
book@100ask:~/workspaces/tina-v853-open$ source build/envsetup.sh...book@100ask:~/workspaces/tina-v853-open$ lunch... 输入1，选择方案1在内核配置界面中，进入如下目录，输入M选中下面两项。
→ Device Drivers → Multimedia support → V4L platform devices sunxi video input (camera csi/mipi isp vipp)driver v4l2 new driver for SUNXI可以看到全志已经支持了很多摄像头，找到我们需要适配的摄像头，输入M将gc2053驱动编为模块。
→ Device Drivers → Multimedia support → V4L platform devices → sensor driver select use gc2053_mipi driver注意：如果出现没有的路径，需要选择上一级目录才会打开。
在Tina根目录下输入make menuconfig，进入如下目录
> Kernel modules > Video Support <*> kmod-vin-v4l2.............................. Video input support (staging)如下图所示
modules.mk主要完成两个方面：
拷贝相关的ko模块到小机rootfs中rootfs启动时，按顺序自动加载相关的ko模块。modules.mk文件路径：
tina-v853-open/openwrt/target/v853/v853-100ask/modules.mk驱动加载顺序配置
define KernelPackage/vin-v4l2 SUBMENU:=$(VIDEO_MENU) TITLE:=Video input support (staging) DEPENDS:= FILES:=$(LINUX_DIR)/drivers/media/v4l2-core/videobuf2-core.ko FILES+=$(LINUX_DIR)/drivers/media/v4l2-core/videobuf2-dma-contig.ko FILES+=$(LINUX_DIR)/drivers/media/v4l2-core/videobuf2-memops.ko FILES+=$(LINUX_DIR)/drivers/media/v4l2-core/videobuf2-v4l2.ko FILES+=$(LINUX_DIR)/drivers/media/platform/sunxi-vin/vin_io.ko FILES+=$(LINUX_DIR)/drivers/media/platform/sunxi-vin/modules/sensor/gc2053_mipi.ko # FILES+=$(LINUX_DIR)/drivers/media/platform/sunxi-vin/modules/sensor_power/sensor_power.ko FILES+=$(LINUX_DIR)/drivers/media/platform/sunxi-vin/vin_v4l2.ko FILES+=$(LINUX_DIR)/drivers/input/sensor/da380/da380.ko AUTOLOAD:=$(call AutoProbe,videobuf2-core videobuf2-dma-contig videobuf2-memops videobuf2-v4l2 vin_io gc2053_mipi vin_v4l2 da380.ko) endef define KernelPackage/vin-v4l2/description Kernel modules for video input support endef $(eval $(call KernelPackage,vin-v4l2))V853平台在完成modules.mk配置后，还需要完成.ko挂载脚本S00mpp的配置，以便开机快速启动摄像头模块。
S00mpp配置路径：
tina-v853-open/openwrt/target/v853/v853-100ask/busybox-init-base-files/etc/init.d/S00mpp脚本对摄像头驱动进行了提前加载，应用需要使用的时候即可快速配置并启动。
#!/bin/sh## Load mpp modules....#MODULES_DIR="/lib/modules/`uname -r`"start() { printf "Load mpp modulesn" insmod $MODULES_DIR/videobuf2-core.ko insmod $MODULES_DIR/videobuf2-memops.ko insmod $MODULES_DIR/videobuf2-dma-contig.ko insmod $MODULES_DIR/videobuf2-v4l2.ko insmod $MODULES_DIR/vin_io.ko# insmod $MODULES_DIR/sensor_power.ko insmod $MODULES_DIR/gc4663_mipi.ko insmod $MODULES_DIR/vin_v4l2.ko insmod $MODULES_DIR/sunxi_aio.ko insmod $MODULES_DIR/sunxi_eise.ko# insmod $MODULES_DIR/vipcore.ko}stop() { printf "Unload mpp modulesn"# rmmod $MODULES_DIR/vipcore.ko rmmod $MODULES_DIR/sunxi_eise.ko rmmod $MODULES_DIR/sunxi_aio.ko rmmod $MODULES_DIR/vin_v4l2.ko rmmod $MODULES_DIR/gc4663_mipi.ko# rmmod $MODULES_DIR/sensor_power.ko rmmod $MODULES_DIR/vin_io.ko rmmod $MODULES_DIR/videobuf2-v4l2.ko rmmod $MODULES_DIR/videobuf2-dma-contig.ko rmmod $MODULES_DIR/videobuf2-memops.ko rmmod $MODULES_DIR/videobuf2-core.ko}case "$1" in start) start ;; stop) stop ;; restart|reload) stop start ;; *) echo "Usage: $0 {start|stop|restart}" exit 1esacexit $?在Tina根目录下执行make menuconfig，进入Tina配置界面后，进入如下目录，输入Y选中camerademo测试程序。
> Allwinner > Vision<*> camerademo........................................ camerademo test sensor ---> 在Tina的根目录下，输入make -j32
book@100ask:~/workspaces/tina-v853-open$ make -j32...book@100ask:~/workspaces/tina-v853-open$ pack... 生成镜像后，将tina-v853-open/out/v853/100ask/openwrt/目录下的v853_linux_100ask_uart0.img镜像拷贝到Windows电脑主机中，使用全志PhoenixSuit烧写工具烧写到开发板上。
上电前需要连接插上12V的电源线，和两条Type-C，把开关拨向电源接口方向上电，烧写新镜像后等待启动系统，在命令行中输入lsmod
root@TinaLinux:/# lsmod Module Size Used byvin_v4l2 181099 0 gc2053_mipi 8567 0 vin_io 21106 3 vin_v4l2,gc2053_mipivideobuf2_v4l2 9304 1 vin_v4l2videobuf2_dma_contig 8632 1 vin_v4l2videobuf2_memops 948 1 videobuf2_dma_contigvideobuf2_core 22168 2 vin_v4l2,videobuf2_v4l2xradio_wlan 598 0 xradio_core 431911 1 xradio_wlanxradio_mac 222724 1 xradio_core可以看到我们之前选中的VIN驱动和GC2053驱动已经装载进去了
在开发板的串口终端界面输入camedemo -h可以输出camera测试程序的使用教程
root@TinaLinux:/# camerademo -h[CAMERA]**********************************************************[CAMERA]* *[CAMERA]* this is camera test. *[CAMERA]* *[CAMERA]**********************************************************[CAMERA]******************** camerademo help *********************[CAMERA] This programis a test camera.[CAMERA] It will query the sensor to support the resolution, output format and test frame rate.[CAMERA] At the same time you canmodify the data to save the path and get the number of photos.[CAMERA] When the last parameter is debug, the output will be more detailed information[CAMERA] There are eight ways to run:[CAMERA] 1.camerademo --- use the default parameters.[CAMERA] 2.camerademo debug --- use the default parameters and output debug information.[CAMERA] 3.camerademo setting --- can choose the resolution and data format.[CAMERA] 4.camerademo setting debug --- setting and output debug information.[CAMERA] 5.camerademo NV21 640 480 30 bmp /tmp 5 --- param input mode,can save bmp or yuv.[CAMERA] 6.camerademo NV21 640 480 30 bmp /tmp 5 debug --- output debug information.[CAMERA] 7.camerademo NV21 640 480 30 bmp /tmp 5 Num --- /dev/videoNum param input mode,can save bmp or yuv.[CAMERA] 8.camerademo NV21 640 480 30 bmp /tmp 5 Num debug --- /dev/videoNum output debug information.[CAMERA] 8.camerademo NV21 640 480 30 bmp /tmp 5 Num 1 --- 1/2: chose memory: V4L2_MEMORY_MMAP/USERPTR[CAMERA]**********************************************************在开发板的串口终端界面输入camerademo NV21 640 480 30 bmp /tmp 5，将会拍摄5张照片放在/tmp目录下，将/tmp目录下的文件拷贝到电脑端即可查看相应的图片。
具体教程可以参考：https://tina.100ask.net/SdkModule/Linux_Camera_DevelopmentGuide-06/
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