[PATCH V2 2/5] [Media] New control class and features for FM RX

[manjunatha_halli]

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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