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 };