请提供一个gc0308摄像头模组的驱动代码

gc0308是一种驱动IC，不是摄像头模组。要使用gc0308驱动摄像头模组，需要在摄像头模组上安装gc0308驱动IC，然后在设备端使用相应的驱动软件来控制和使用摄像头。

驱动代码可以参考以下内容：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/mman.h>
#include <sys/ioctl.h>
#include <linux/videodev2.h>
#include <pthread.h>

#define DEVICE_NAME "/dev/video0"
#define WIDTH       640
#define HEIGHT      480
#define IMAGE_SIZE  (WIDTH * HEIGHT * 3 / 2)

int fd;
unsigned char *framebuf;

int init_v4l2(void)
{
    struct v4l2_capability cap;
    struct v4l2_format fmt;
    unsigned int i;

    if ((fd = open(DEVICE_NAME, O_RDWR)) < 0) {
        perror("open");
        return -1;
    }

    if (ioctl(fd, VIDIOC_QUERYCAP, &cap) < 0) {
        perror("VIDIOC_QUERYCAP");
        return -1;
    }

    if (!(cap.capabilities & V4L2_CAP_VIDEO_CAPTURE)) {
        fprintf(stderr, "The device does not support capture.\n");
        return -1;
    }

    if (!(cap.capabilities & V4L2_CAP_STREAMING)) {
        fprintf(stderr, "The device does not support streaming.\n");
        return -1;
    }

    memset(&fmt, 0, sizeof(fmt));
    fmt.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
    fmt.fmt.pix.width = WIDTH;
    fmt.fmt.pix.height = HEIGHT;
    fmt.fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
    fmt.fmt.pix.field = V4L2_FIELD_INTERLACED;
    if (ioctl(fd, VIDIOC_S_FMT, &fmt) < 0) {
        perror("VIDIOC_S_FMT");
        return -