diff options
| author | Antti Palosaari <crope@iki.fi> | 2015-10-10 19:51:04 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-10-20 20:52:26 +0300 |
| commit | b3ae29667e22921b8bd8ba84bf719a240f303aa2 (patch) | |
| tree | 87a60ea794cbfcc289f2cd007b501967bcd5a5a4 /drivers/media | |
| parent | 486dc9e59fd0ab6c674432f3d57721d1521bc17d (diff) | |
| download | linux-b3ae29667e22921b8bd8ba84bf719a240f303aa2.tar.xz | |
[media] hackrf: add control for RF amplifier
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@iki.fi>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'drivers/media')
| -rw-r--r-- | drivers/media/usb/hackrf/hackrf.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/media/usb/hackrf/hackrf.c b/drivers/media/usb/hackrf/hackrf.c index 1d93db39f66a..eee42b48a3c7 100644 --- a/drivers/media/usb/hackrf/hackrf.c +++ b/drivers/media/usb/hackrf/hackrf.c @@ -32,6 +32,7 @@ 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, }; @@ -135,6 +136,7 @@ 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; @@ -166,6 +168,7 @@ 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); @@ -953,6 +956,22 @@ 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; @@ -996,6 +1015,9 @@ 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; @@ -1081,13 +1103,15 @@ 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, |