We're using similar one internally.
Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
On 4/19/12, manjunatha_halli@xxxxxx <manjunatha_halli@xxxxxx> wrote:
> From: Manjunatha Halli <x0130808@xxxxxx>
>
> This patch creates new ctrl class for FM RX and adds new CID's for
> below FM features,
> 1) De-Emphasis filter mode
> 2) RDS AF switch
>
> Also this patch adds a field for band selection in struct v4l2_hw_freq_seek
>
> Signed-off-by: Manjunatha Halli <x0130808@xxxxxx>
> ---
> drivers/media/video/v4l2-ctrls.c | 17 +++++++++++++++++
> include/linux/videodev2.h | 16 +++++++++++++++-
> 2 files changed, 32 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/media/video/v4l2-ctrls.c
> b/drivers/media/video/v4l2-ctrls.c
> index 18015c0..e1bba7d 100644
> --- a/drivers/media/video/v4l2-ctrls.c
> +++ b/drivers/media/video/v4l2-ctrls.c
> @@ -372,6 +372,12 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
> NULL,
> };
>
> + static const char * const tune_deemphasis[] = {
> + "No deemphasis",
> + "50 useconds",
> + "75 useconds",
> + NULL,
> + };
> switch (id) {
> case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
> return mpeg_audio_sampling_freq;
> @@ -414,6 +420,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
> return colorfx;
> case V4L2_CID_TUNE_PREEMPHASIS:
> return tune_preemphasis;
> + case V4L2_CID_TUNE_DEEMPHASIS:
> + return tune_deemphasis;
> case V4L2_CID_FLASH_LED_MODE:
> return flash_led_mode;
> case V4L2_CID_FLASH_STROBE_SOURCE:
> @@ -644,6 +652,12 @@ const char *v4l2_ctrl_get_name(u32 id)
> case V4L2_CID_JPEG_COMPRESSION_QUALITY: return "Compression Quality";
> case V4L2_CID_JPEG_ACTIVE_MARKER: return "Active Markers";
>
> + /* FM Radio Receiver control */
> + /* Keep the order of the 'case's the same as in videodev2.h! */
> + case V4L2_CID_FM_RX_CLASS: return "FM Radio Receiver Controls";
> + case V4L2_CID_RDS_AF_SWITCH: return "FM RX RDS AF switch";
> + case V4L2_CID_TUNE_DEEMPHASIS: return "FM RX De-emphasis settings";
> +
> default:
> return NULL;
> }
> @@ -688,6 +702,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum
> v4l2_ctrl_type *type,
> case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
> case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
> case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
> + case V4L2_CID_RDS_AF_SWITCH:
> *type = V4L2_CTRL_TYPE_BOOLEAN;
> *min = 0;
> *max = *step = 1;
> @@ -733,6 +748,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum
> v4l2_ctrl_type *type,
> case V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL:
> case V4L2_CID_MPEG_VIDEO_MPEG4_PROFILE:
> case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
> + case V4L2_CID_TUNE_DEEMPHASIS:
> *type = V4L2_CTRL_TYPE_MENU;
> break;
> case V4L2_CID_RDS_TX_PS_NAME:
> @@ -745,6 +761,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum
> v4l2_ctrl_type *type,
> case V4L2_CID_FM_TX_CLASS:
> case V4L2_CID_FLASH_CLASS:
> case V4L2_CID_JPEG_CLASS:
> + case V4L2_CID_FM_RX_CLASS:
> *type = V4L2_CTRL_TYPE_CTRL_CLASS;
> /* You can neither read not write these */
> *flags |= V4L2_CTRL_FLAG_READ_ONLY | V4L2_CTRL_FLAG_WRITE_ONLY;
> diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
> index c9c9a46..00ac1b7 100644
> --- a/include/linux/videodev2.h
> +++ b/include/linux/videodev2.h
> @@ -1137,6 +1137,7 @@ struct v4l2_ext_controls {
> #define V4L2_CTRL_CLASS_FM_TX 0x009b0000 /* FM Modulator control class */
> #define V4L2_CTRL_CLASS_FLASH 0x009c0000 /* Camera flash controls */
> #define V4L2_CTRL_CLASS_JPEG 0x009d0000 /* JPEG-compression controls */
> +#define V4L2_CTRL_CLASS_FM_RX 0x009e0000 /* FM Receiver control class */
>
> #define V4L2_CTRL_ID_MASK (0x0fffffff)
> #define V4L2_CTRL_ID2CLASS(id) ((id) & 0x0fff0000UL)
> @@ -1782,6 +1783,18 @@ enum v4l2_jpeg_chroma_subsampling {
> #define V4L2_JPEG_ACTIVE_MARKER_DQT (1 << 17)
> #define V4L2_JPEG_ACTIVE_MARKER_DHT (1 << 18)
>
> +/* FM Receiver class control IDs */
> +#define V4L2_CID_FM_RX_CLASS_BASE (V4L2_CTRL_CLASS_FM_RX | 0x900)
> +#define V4L2_CID_FM_RX_CLASS (V4L2_CTRL_CLASS_FM_RX | 1)
> +
> +#define V4L2_CID_RDS_AF_SWITCH (V4L2_CID_FM_RX_CLASS_BASE + 1)
> +#define V4L2_CID_TUNE_DEEMPHASIS (V4L2_CID_FM_RX_CLASS_BASE + 2)
> +enum v4l2_deemphasis {
> + V4L2_DEEMPHASIS_DISABLED = 0,
> + V4L2_DEEMPHASIS_50_uS = 1,
> + V4L2_DEEMPHASIS_75_uS = 2,
> +};
> +
> /*
> * T U N I N G
> */
> @@ -1849,7 +1862,8 @@ struct v4l2_hw_freq_seek {
> __u32 seek_upward;
> __u32 wrap_around;
> __u32 spacing;
> - __u32 reserved[7];
> + __u32 fm_band;
> + __u32 reserved[6];
> };
>
> /*
> --
> 1.7.4.1
>
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