详解linux摄像头驱动编写

drivers/media 

config VIDEO_S3C_CAMIF 
  tristate "Samsung S3C24XX/S3C64XX SoC Camera Interface driver" 
  depends on VIDEO_V4L2 && I2C && VIDEO_V4L2_SUBDEV_API 
  depends on PM 
  depends on ARCH_S3C64XX || PLAT_S3C24XX || COMPILE_TEST 
  depends on HAS_DMA 
  select VIDEOBUF2_DMA_CONTIG 
  ---help--- 
   This is a v4l2 driver for s3c24xx and s3c64xx SoC series camera 
   host interface (CAMIF). 
 
   To compile this driver as a module, choose M here: the module 
   will be called s3c-camif. 

obj-$(CONFIG_VIDEO_S3C_CAMIF)    += s3c-camif/ 

# Makefile for s3c244x/s3c64xx CAMIF driver 
 
s3c-camif-objs := camif-core.o camif-capture.o camif-regs.o 
 
obj-$(CONFIG_VIDEO_S3C_CAMIF) += s3c-camif.o 

static const struct v4l2_ioctl_ops s3c_camif_ioctl_ops = { 
  .vidioc_querycap   = s3c_camif_vidioc_querycap, 
  .vidioc_enum_input  = s3c_camif_vidioc_enum_input, 
  .vidioc_g_input    = s3c_camif_vidioc_g_input, 
  .vidioc_s_input    = s3c_camif_vidioc_s_input, 
  .vidioc_enum_fmt_vid_cap = s3c_camif_vidioc_enum_fmt, 
  .vidioc_try_fmt_vid_cap  = s3c_camif_vidioc_try_fmt, 
  .vidioc_s_fmt_vid_cap   = s3c_camif_vidioc_s_fmt, 
  .vidioc_g_fmt_vid_cap   = s3c_camif_vidioc_g_fmt, 
  .vidioc_g_selection  = s3c_camif_g_selection, 
  .vidioc_s_selection  = s3c_camif_s_selection, 
  .vidioc_reqbufs    = s3c_camif_reqbufs, 
  .vidioc_querybuf   = s3c_camif_querybuf, 
  .vidioc_prepare_buf  = s3c_camif_prepare_buf, 
  .vidioc_create_bufs  = s3c_camif_create_bufs, 
  .vidioc_qbuf     = s3c_camif_qbuf, 
  .vidioc_dqbuf     = s3c_camif_dqbuf, 
  .vidioc_streamon   = s3c_camif_streamon, 
  .vidioc_streamoff   = s3c_camif_streamoff, 
  .vidioc_subscribe_event  = v4l2_ctrl_subscribe_event, 
  .vidioc_unsubscribe_event = v4l2_event_unsubscribe, 
  .vidioc_log_status  = v4l2_ctrl_log_status, 
}; 

649 static const struct v4l2_file_operations s3c_camif_fops = { 
650     .owner     = THIS_MODULE, 
651     .open      = s3c_camif_open, 
652     .release    = s3c_camif_close, 
653     .poll      = s3c_camif_poll, 
654     .unlocked_ioctl = video_ioctl2, 
655     .mmap      = s3c_camif_mmap, 
656 };