On 07/31/2015 04:10 AM, Antti Palosaari wrote:
> There is Avago MGA-81563 amplifier just right after antenna connector.
> It could be turned on/off and its gain is around 12dB.
>
> Signed-off-by: Antti Palosaari <crope@xxxxxx>
Acked-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
> ---
> drivers/media/usb/hackrf/hackrf.c | 26 +++++++++++++++++++++++++-
> 1 file changed, 25 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/usb/hackrf/hackrf.c b/drivers/media/usb/hackrf/hackrf.c
> index fd1fa41..136de9a 100644
> --- a/drivers/media/usb/hackrf/hackrf.c
> +++ b/drivers/media/usb/hackrf/hackrf.c
> @@ -31,6 +31,7 @@ enum {
> CMD_BOARD_ID_READ = 0x0e,
> CMD_VERSION_STRING_READ = 0x0f,
> CMD_SET_FREQ = 0x10,
> + CMD_AMP_ENABLE = 0x11,
> CMD_SET_LNA_GAIN = 0x13,
> CMD_SET_VGA_GAIN = 0x14,
> };
> @@ -133,6 +134,7 @@ struct hackrf_dev {
> struct v4l2_ctrl_handler hdl;
> struct v4l2_ctrl *bandwidth_auto;
> struct v4l2_ctrl *bandwidth;
> + struct v4l2_ctrl *rf_gain;
> struct v4l2_ctrl *lna_gain;
> struct v4l2_ctrl *if_gain;
>
> @@ -164,6 +166,7 @@ static int hackrf_ctrl_msg(struct hackrf_dev *dev, u8 request, u16 value,
> switch (request) {
> case CMD_SET_TRANSCEIVER_MODE:
> case CMD_SET_FREQ:
> + case CMD_AMP_ENABLE:
> case CMD_SAMPLE_RATE_SET:
> case CMD_BASEBAND_FILTER_BANDWIDTH_SET:
> pipe = usb_sndctrlpipe(dev->udev, 0);
> @@ -949,6 +952,22 @@ static int hackrf_set_bandwidth(struct hackrf_dev *dev)
> return ret;
> }
>
> +static int hackrf_set_rf_gain(struct hackrf_dev *dev)
> +{
> + int ret;
> + u8 u8tmp;
> +
> + dev_dbg(dev->dev, "rf val=%d->%d\n",
> + dev->rf_gain->cur.val, dev->rf_gain->val);
> +
> + u8tmp = (dev->rf_gain->val) ? 1 : 0;
> + ret = hackrf_ctrl_msg(dev, CMD_AMP_ENABLE, u8tmp, 0, NULL, 0);
> + if (ret)
> + dev_dbg(dev->dev, "failed=%d\n", ret);
> +
> + return ret;
> +}
> +
> static int hackrf_set_lna_gain(struct hackrf_dev *dev)
> {
> int ret;
> @@ -992,6 +1011,9 @@ static int hackrf_s_ctrl(struct v4l2_ctrl *ctrl)
> case V4L2_CID_RF_TUNER_BANDWIDTH:
> ret = hackrf_set_bandwidth(dev);
> break;
> + case V4L2_CID_RF_TUNER_RF_GAIN:
> + ret = hackrf_set_rf_gain(dev);
> + break;
> case V4L2_CID_RF_TUNER_LNA_GAIN:
> ret = hackrf_set_lna_gain(dev);
> break;
> @@ -1077,13 +1099,15 @@ static int hackrf_probe(struct usb_interface *intf,
> }
>
> /* Register controls */
> - v4l2_ctrl_handler_init(&dev->hdl, 4);
> + v4l2_ctrl_handler_init(&dev->hdl, 5);
> dev->bandwidth_auto = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
> V4L2_CID_RF_TUNER_BANDWIDTH_AUTO, 0, 1, 1, 1);
> dev->bandwidth = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
> V4L2_CID_RF_TUNER_BANDWIDTH,
> 1750000, 28000000, 50000, 1750000);
> v4l2_ctrl_auto_cluster(2, &dev->bandwidth_auto, 0, false);
> + dev->rf_gain = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
> + V4L2_CID_RF_TUNER_RF_GAIN, 0, 12, 12, 0);
> dev->lna_gain = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
> V4L2_CID_RF_TUNER_LNA_GAIN, 0, 40, 8, 0);
> dev->if_gain = v4l2_ctrl_new_std(&dev->hdl, &hackrf_ctrl_ops,
>
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