C++ (Cpp) fmc_transfer_rds_from_internal_buff示例

示例#1

文件： fmdrv_v4l2.c 项目： ARMP/android_kernel_lge_x3

/* Read RX RDS data */
static ssize_t fm_v4l2_fops_read(struct file *file, char __user * buf,
					size_t count, loff_t *ppos)
{
	u8 rds_mode;
	int ret;
	struct fmdev *fmdev;

	fmdev = video_drvdata(file);

	if (!radio_disconnected) {
		fmerr("FM device is already disconnected\n");
		return -EIO;
	}

	/* Turn on RDS mode , if it is disabled */
	ret = fm_rx_get_rds_mode(fmdev, &rds_mode);
	if (ret < 0) {
		fmerr("Unable to read current rds mode\n");
		return ret;
	}

	if (rds_mode == FM_RDS_DISABLE) {
		ret = fmc_set_rds_mode(fmdev, FM_RDS_ENABLE);
		if (ret < 0) {
			fmerr("Failed to enable rds mode\n");
			return ret;
		}
	}

	/* Copy RDS data from internal buffer to user buffer */
	return fmc_transfer_rds_from_internal_buff(fmdev, file, buf, count);
}

示例#2

文件： fmdrv_v4l2.c 项目： LeaderRider/kernel3NookTablet

/* Read RX RDS data */
static ssize_t fm_v4l2_fops_read(struct file *file, char __user * buf,
					size_t count, loff_t *ppos)
{
	u8 rds_mode;
	int ret, no_of_chans;
	struct fmdev *fmdev;

	fmdev = video_drvdata(file);

	no_of_chans = fmdev->rx.no_of_chans;

	if (!radio_disconnected) {
		fmerr("FM device is already disconnected\n");
		return -EIO;
	}

	if (fmdev->rx.comp_scan_status == 1) {
		fmdev->rx.comp_scan_status = 0;
		memcpy(buf, &fmdev->rx.stat_found[0], 4*fmdev->rx.no_of_chans);

		if (fmdev->rx.rds.pause == 1) {
			fmdev->rx.rds.pause = 0;

			ret = fmc_set_rds_mode(fmdev, FM_RDS_ENABLE);
			if (ret < 0)
				fmerr("Failed to set RX RDS mode\n");
		}

		/* Set back the Original Frequency */
		fmc_set_freq(fmdev, fmdev->rx.freq);

		return 4*fmdev->rx.no_of_chans;
	}

	/* Turn on RDS mode , if it is disabled */
	ret = fm_rx_get_rds_mode(fmdev, &rds_mode);
	if (ret < 0) {
		fmerr("Unable to read current rds mode\n");
		return ret;
	}

	if (rds_mode == FM_RDS_DISABLE) {
		ret = fmc_set_rds_mode(fmdev, FM_RDS_ENABLE);
		if (ret < 0) {
			fmerr("Failed to enable rds mode\n");
			return ret;
		}
	}

	/* Copy RDS data from internal buffer to user buffer */
	return fmc_transfer_rds_from_internal_buff(fmdev, file, buf, count);
}