BSP内核的摄像头使用

Device Drivers -> 
<*> Multimedia support  --->        
 <*>   sunxi video encoder and decoder support     //视频编码器,包括h264/mpeg4/mpeg2/vc1/rmvb.  以模块形式编译,cedar_ve.ko
[*]   Video capture adapters  --->  
[*]   V4L platform devices  --->
--- V4L platform devices                                                                        
< >   Support for timberdale Video In/LogiWIN                                                   
<*>   SoC camera support                                                                        
< >     imx074 support                                                                          
< >     mt9m001 support                                                                         
< >     mt9m111, mt9m112 and mt9m131 support                                                    
< >     mt9t031 support                                                                         
< >     mt9t112 support                                                                         
< >     mt9v022 support                                                                         
< >     rj54n1cb0c support                                                                      
< >     tw9910 support                                                                          
< >     platform camera support                                                                 
<M>     ov2640 camera support                                                                   
<M>     ov5642 camera support                                                                   
< >     ov6650 sensor support                                                                   
< >     ov772x camera support                                                                   
< >     ov9640 camera support                                                                   
< >     ov9740 camera support                                                                   
< >   SuperH Mobile MIPI CSI-2 Interface driver                                                 
< >   SuperH Mobile CEU Interface driver                                                        
<*>   sunxi video front end (camera and etc)driver                                              
<*>     v4l2 driver for SUNXI                                                                   
Sensor CSI  --->
< > ov2710_mipi                                                                                 
< > ov4689                                                                                      
< > ov4689 60fps                                                                                
< > ar0330 mipi                                                                                 
< > ov4689 sdv                                                                                  
< > gc1004_mipi                                                                                 
<M> h22_mipi                                                                                    
< > nt99231_mipi

查看编译后的ko:

//触摸屏
aw5306_ts.ko
gt818_ts.ko
gt82x.ko
gt911_ts.ko
ft5x_ts.ko
gslX680.ko
gslX680new.ko
icn83xx_ts.ko
gt9xx_ts.ko
gt9xxf_ts.ko
tu_ts.ko

//杂项
da380.ko    //加速度传感器
fatfs.ko    //文件系统
scsi_wait_scan.ko
sw-device.ko    //Linux kernel modules for  Detection i2c device.
uvcvideo.ko     //UVC摄像头

//普通摄像头驱动  media/video/
ov2640.ko
ov5642.ko

//V4L2
videobuf-core.ko
videobuf-dma-contig.ko
videobuf2-core.ko
videobuf2-memops.ko
videobuf2-vmalloc.ko

//VFE
vfe_v4l2.ko         //media/video/sunxi-vfe
vfe_os.ko
vfe_subdev.ko
cci.ko      //摄像头控制接口,sunxi-vfe/csi_cci
h22_mipi.ko    //media/video/sunxi-vfe/device/h22_mipi.ko

//cedar  视频编码
cedar_ve.ko   //media/cedar-ve/cedar_ve.ko

实际可以使用的是 media/video/sunxi-vfe/ 下的摄像头驱动

platform_cfg.h  
bsp_common.c         
config.c        
config.h  
vfe.c
vfe.h
vfe_os.c
vfe_os.h
vfe_os.ko
vfe_subdev.c
vfe_subdev.h
vfe_subdev.ko
vfe_v4l2.ko   
//调焦器
actuator        
//摄像头控制器接口驱动
csi             
csi_cci      
mipi_csi 
//闪光灯
flash_light
//ISP相关
isp_cfg  
lib     //isp库
platform    //不同主控芯片的配置
//测试,功能
test
utility
//支持的传感器
device          

支持的传感器

Makefile       gc0312.c       gc5004.c        hi257.c          nt99252.c       ov5640.c        s5k3h7.c       sp2518.c
ar0330.c       gc0328.c       gc5004_mipi.c   hm5040.c         ov12830.c       ov5640_mipi.c   s5k4e1.c       sp2519.c
ar0330_mipi.c  gc0328c.c      gs5604.c        hm5065.c         ov13850.c       ov5647.c        s5k4e1_mipi.c  sp5408.c
bf3a03.c       gc0329.c       gt2005.c        hm8030.c         ov16825.c       ov5647_mipi.c   s5k4ec.c       sp5409.c
built-in.o     gc1004_mipi.c  h22_mipi.c      hm8131.c         ov2640.c        ov5648.c        s5k4ec_mipi.c  t4k05.c
camera.h       gc2035.c       h22_mipi.ko     imx179.c         ov2686.c        ov5650.c        s5k5e2ya.c     t8et5.c
camera_cfg.h   gc2145.c       h22_mipi.mod.c  imx214.c         ov2710.c        ov7736.c        s5k5e2yx.c     tc358743.c
gc0307.c       gc2155.c       h22_mipi.mod.o  imx219.c         ov2710_mipi.c   ov8825.c        siv121d.c
gc0308.c       gc2235.c       h22_mipi.o      modules.builtin  ov4689.c        ov8850.c        sp0718.c
gc0309.c       gc2355.c       h42_mipi.c      modules.order    ov4689_60fps.c  ov8858.c        sp0838.c
gc0311.c       gc2355_mipi.c  hi253.c         nt99231_mipi.c   ov4689_sdv.c    ov8858_4lane.c  sp2508.c

可见zero配套的ov2640和ov5647都在其中。

但是他们不在menuconfig中,所以在上层的Kconfig中加入:

config OV2640
        tristate "ov2640"
        default n
config OV5647_MIPI
        tristate "ov5647_mipi"
        default n

在本层的Makefile中加入:

obj-$(CONFIG_OV2640)            += ov2640.o
obj-$(CONFIG_OV5647_MIPI)       += ov5647_mipi.o

重新在menuconfig中勾选,编译,即可得到:

LD [M]  drivers/media/video/sunxi-vfe/device/ov2640.ko
LD [M]  drivers/media/video/sunxi-vfe/device/ov5647_mipi.ko

将ko文件放入系统中,手动加载,然后使用fswebcam尝试拍照:

root@LicheePi:~# fswebcam -d /dev/video0 --no-banner -r 320x240 capture.jpg
[  255.199106] [VFE]vfe_open
--- Opening /dev/video0---
[  255.202406] [VFE]------------------------..vfe clk open!---------------------..
Trying source module v4l2---[  255.213786] [VFE]vfe_open ok

[  255.219628] [VFE_ERR]input index(0) > dev->dev_qty(1)-1 invalid!, device_valid_flag[0] = 0
/dev/video0 opened.
255.229491] [VFE]vfe_close
mNo input was specified, using t[  255.235232] [VFE]vfe select input flag = 0, s_input have not be used .
he first.
Unable to qu[  255.245365] [VFE]------------------------..vfe clk close!---------------------..
ery input 0.
VIDIOC_EN[  255.256556] [VFE]vfe_close end
UMINPUT: Invalid argument

跟踪相关信息,是在vfe.c,

函数 static int vidioc_enum_input(struct file*file, void *priv,struct v4l2_input *inp) 中:

2807         if (0 == dev->device_valid_flag[inp->index]) {
2808                 vfe_err("input index(%d) > dev->dev_qty(%d)-1 invalid!, device_valid_flag[%d] = %d\n", inp->index, dev->dev_     qty,inp->index, dev->device_valid_flag[inp->index]);
2809                 return -EINVAL;
2810         }

即枚举摄像头时,发现device_valid_flag标志位不对,该标志位是在:

static void probe_work_handle(struct work_struct *work)
if(vfe_sensor_register_check(dev,&dev->v4l2_dev,dev->ccm_cfg[input_num],&dev->dev_sensor[input_num],input_nu     m) == NULL)
5126                 {
5127                         vfe_err("vfe sensor register check error at input_num = %d\n",input_num);
5128                         dev->device_valid_flag[input_num] = 0;
5129                         //goto snesor_register_end;
5130                 }
5131                 else{
5132                         dev->device_valid_flag[input_num] = 1;
5133                 }

这个函数是在vfe_probe中调用,也即初始化时检测的。

vfe驱动加载过程:

  • csi_cci/cci_platform_drv.c 加载cci.ko
  • vfe.c vfe_os.ko加载
  • vfe_subdev.ko
  • vfe_v4l2.ko //media/video/sunxi-vfe

查看开机启动信息:

//cci.ko加载,即摄像头控制器初始化
[    0.808628] [VFE]cci probe start cci_sel = 0!
[    0.813793] [VFE]cci probe end cci_sel = 0!
[    0.818593] [VFE]cci_init end

//VFE驱加载
[    0.822038] [VFE]Welcome to Video Front End driver
[    0.827986] [VFE]pdev->id = 0
[    0.831435] [VFE]dev->mipi_sel = 0
[    0.835324] [VFE]dev->vip_sel = 0
[    0.839114] [VFE]dev->isp_sel = 0
[    0.849164] [VFE_WARN]vfe vpu clock is null
[    0.849164] [VFE_WARN]vfe vpu clock is null
[    0.860599] [VFE]pdev->id = 1
[    0.864021] [VFE]dev->mipi_sel = 1
[    0.868014] [VFE]dev->vip_sel = 1
[    0.871864] [VFE]dev->isp_sel = 0
[    0.875672] [VFE]probe_work_handle start!
[    0.880358] [VFE]------------------------..vfe clk open!---------------------..
[    0.880358] [VFE]------------------------..vfe clk open!---------------------..
[    0.889010] [VFE]v4l2 subdev register input_num = 0
[    0.894683] [VFE_WARN]vfe vpu clock is null
[    0.894683] [VFE_WARN]vfe vpu clock is null
[    0.899688] [VFE_ERR]vip1 request pinctrl handle for device [csi1] failed!
[    0.907603] [VFE_ERR]get regulator csi_avdd error!
[    0.913056] [VFE_ERR]vfe_device_regulator_get error at input_num = 0
[    0.913056] [VFE_ERR]vfe_device_regulator_get error at input_num = 0
[    0.920482] [VFE]vfe_init end
[    0.920482] [VFE]vfe_init end

//V4L2设备注册,生成video0
[    0.933586] [VFE]V4L2 device registered as video0
[    0.938969] [VFE]------------------------..vfe clk close!---------------------..
[    0.938969] [VFE]------------------------..vfe clk close!---------------------..
[    0.956440] [VFE]probe_work_handle end!
[    0.960938] [VFE]probe_work_handle start!
[    0.965515] [VFE]------------------------..vfe clk open!---------------------..
[    0.965515] [VFE]------------------------..vfe clk open!---------------------..
[    0.991682] [VFE]v4l2 subdev register input_num = 0
[    0.997227] [VFE]vfe sensor detect start! input_num = 0
[    0.997227] [VFE]vfe sensor detect start! input_num = 0
[    1.003274] [VFE]Find sensor name is "ov2640", i2c address is 60, type is "YUV" !
[    1.011824] [VFE]Sub device register "ov2640" i2c_addr = 0x60 start!
[    1.018998] [VFE_ERR]Error registering v4l2 subdevice No such device!
[    1.026388] [VFE_ERR]vfe sensor register check error at input_num = 0
[    1.026388] [VFE_ERR]vfe sensor register check error at input_num = 0
[    1.079242] [VFE]V4L2 device registered as video1
[    1.084960] [VFE]------------------------..vfe clk close!---------------------..
[    1.084960] [VFE]------------------------..vfe clk close!---------------------..
[    1.116779] [VFE]probe_work_handle end!
[    5.012110] [VFE]vfe_open
[    5.012110] [VFE]vfe_open
[    5.043465] [VFE]vfe_open
[    5.043465] [VFE]vfe_open
[    5.058511] [VFE]------------------------..vfe clk open!---------------------..
[    5.058511] [VFE]------------------------..vfe clk open!---------------------..
[    5.082179] [VFE]------------------------..vfe clk open!---------------------..
[    5.082179] [VFE]------------------------..vfe clk open!---------------------..
[    5.112320] [VFE]vfe_open ok
[    5.112320] [VFE]vfe_open ok
[    5.115853] [VFE]vfe_close
[    5.115853] [VFE]vfe_close
[    5.118958] [VFE]vfe select input flag = 0, s_input have not be used .
[    5.118958] [VFE]vfe select input flag = 0, s_input have not be used .
[    5.126480] [VFE]------------------------..vfe clk close!---------------------..
[    5.126480] [VFE]------------------------..vfe clk close!---------------------..
[    5.144821] [VFE]vfe_open ok
[    5.144821] [VFE]vfe_open ok
[    5.148348] [VFE]vfe_close
[    5.148348] [VFE]vfe_close
[    5.151598] [VFE]vfe select input flag = 0, s_input have not be used .
[    5.151598] [VFE]vfe select input flag = 0, s_input have not be used .
[    5.158972] [VFE]------------------------..vfe clk close!---------------------..
[    5.158972] [VFE]------------------------..vfe clk close!---------------------..
[    5.224773] [VFE]vfe_close end
[    5.224773] [VFE]vfe_close end
[    5.282919] [VFE]vfe_close end
[    5.282919] [VFE]vfe_close end
static struct v4l2_subdev *vfe_sensor_register_check(struct vfe_dev *dev,struct v4l2_device *v4l2_dev,struct ccm_config  *ccm_cfg,
                    struct i2c_board_info *sensor_i2c_board,int input_num )
{
    int sensor_cnt,ret, sensor_num;
    struct sensor_item sensor_info;
    if(dev->vip_define_sensor_list == 1)
    {
        sensor_num = ccm_cfg->sensor_cfg_ini->detect_sensor_num;
        if(ccm_cfg->sensor_cfg_ini->detect_sensor_num == 0) {
            sensor_num = 1;
        }
    } else {
        sensor_num = 1;
    }
    for(sensor_cnt=0; sensor_cnt<sensor_num; sensor_cnt++)
    {
        if(dev->vip_define_sensor_list == 1)
        {
            if(ccm_cfg->sensor_cfg_ini->detect_sensor_num > 0)
                cpy_ccm_sub_device_cfg(ccm_cfg, sensor_cnt);
        }
        if(get_sensor_info(ccm_cfg->ccm, &sensor_info) == 0)
        {
            if(ccm_cfg->i2c_addr != sensor_info.i2c_addr)
            {
                vfe_warn("Sensor info \"%s\" i2c_addr is different from sys_config!\n", sensor_info.sensor_name );
                //vfe_warn("Sensor info i2c_addr = %d, sys_config i2c_addr = %d!\n", sensor_info.i2c_addr, ccm_cfg->i2c_addr);
                //ccm_cfg->i2c_addr = sensor_info.i2c_addr;
            }
            if(ccm_cfg->is_bayer_raw != sensor_info.sensor_type)
            {
                vfe_warn("Camer detect \"%s\" fmt is different from sys_config!\n", sensor_info_type[sensor_info.sensor_type]);
                vfe_warn("Apply detect  fmt = %d replace sys_config fmt = %d!\n", sensor_info.sensor_type, ccm_cfg->is_bayer_raw);
                ccm_cfg->is_bayer_raw = sensor_info.sensor_type;
            }
            if(sensor_info.sensor_type == SENSOR_RAW)
            {
                ccm_cfg->is_isp_used = 1;
            }
            else
            {
                ccm_cfg->act_used = 0;
            }
            vfe_print("Find sensor name is \"%s\", i2c address is %x, type is \"%s\" !\n",sensor_info.sensor_name,sensor_info.i2c_addr,
                            sensor_info_type[sensor_info.sensor_type]);
        }
        sensor_i2c_board->addr = (unsigned short)(ccm_cfg->i2c_addr>>1);
        strcpy(sensor_i2c_board->type,ccm_cfg->ccm);

        vfe_print("Sub device register \"%s\" i2c_addr = 0x%x start!\n",sensor_i2c_board->type, ccm_cfg->i2c_addr);
        ret = vfe_sensor_subdev_register_check(dev,v4l2_dev,ccm_cfg,sensor_i2c_board);
        if( ret == -1)
        {
            vfe_sensor_subdev_unregister(v4l2_dev,ccm_cfg,sensor_i2c_board);
            vfe_print("Sub device register \"%s\" failed!\n",sensor_i2c_board->type);
            ccm_cfg->sd =NULL;
            continue;
        }
        else if(ret == ENODEV ||ret == EFAULT)
        {
            continue;
        }
        else if(ret == 0)
        {
            vfe_print("Sub device register \"%s\" is OK!\n",sensor_i2c_board->type);
            break;
        }
    }
    return ccm_cfg->sd;
}