[media] v4l: add new tuner types for SDR
Define tuner types V4L2_TUNER_ADC and V4L2_TUNER_RF for SDR usage.
ADC is used for setting sampling rate (sampling frequency) to SDR
device.
Another tuner type, named as V4L2_TUNER_RF, is possible RF tuner.
Is is used to down-convert RF frequency to range ADC could sample.
Having RF tuner is optional, whilst in practice it is almost always
there.
Also add checks to VIDIOC_G_FREQUENCY, VIDIOC_S_FREQUENCY and
VIDIOC_ENUM_FREQ_BANDS only allow these two tuner types when device
type is SDR (VFL_TYPE_SDR). For VIDIOC_G_FREQUENCY we do not check
tuner type, instead override type with V4L2_TUNER_ADC in every
case (requested by Hans in order to keep functionality in line with
existing tuners and existing API does not specify it).
Prohibit VIDIOC_S_HW_FREQ_SEEK explicitly when device type is SDR,
as device cannot do hardware seek without a hardware demodulator.
Signed-off-by: Antti Palosaari <crope@iki.fi>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 707aef7..15ab349 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -1291,8 +1291,11 @@
struct video_device *vfd = video_devdata(file);
struct v4l2_frequency *p = arg;
- p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
- V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
+ if (vfd->vfl_type == VFL_TYPE_SDR)
+ p->type = V4L2_TUNER_ADC;
+ else
+ p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
+ V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
return ops->vidioc_g_frequency(file, fh, p);
}
@@ -1303,10 +1306,15 @@
const struct v4l2_frequency *p = arg;
enum v4l2_tuner_type type;
- type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
- V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
- if (p->type != type)
- return -EINVAL;
+ if (vfd->vfl_type == VFL_TYPE_SDR) {
+ if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
+ return -EINVAL;
+ } else {
+ type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
+ V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
+ if (type != p->type)
+ return -EINVAL;
+ }
return ops->vidioc_s_frequency(file, fh, p);
}
@@ -1386,6 +1394,10 @@
struct v4l2_hw_freq_seek *p = arg;
enum v4l2_tuner_type type;
+ /* s_hw_freq_seek is not supported for SDR for now */
+ if (vfd->vfl_type == VFL_TYPE_SDR)
+ return -EINVAL;
+
type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
if (p->type != type)
@@ -1885,11 +1897,16 @@
enum v4l2_tuner_type type;
int err;
- type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
- V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
-
- if (type != p->type)
- return -EINVAL;
+ if (vfd->vfl_type == VFL_TYPE_SDR) {
+ if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF)
+ return -EINVAL;
+ type = p->type;
+ } else {
+ type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
+ V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
+ if (type != p->type)
+ return -EINVAL;
+ }
if (ops->vidioc_enum_freq_bands)
return ops->vidioc_enum_freq_bands(file, fh, p);
if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {