From 84099a282e1ba0facf7eee5108031a8f38f4b4fe Mon Sep 17 00:00:00 2001 From: Antti Palosaari Date: Wed, 11 Dec 2013 20:24:02 -0300 Subject: [PATCH] [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 Acked-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/v4l2-core/v4l2-ioctl.c | 39 ++++++++++++++++++++-------- include/uapi/linux/videodev2.h | 2 ++ 2 files changed, 30 insertions(+), 11 deletions(-) diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c index 707aef705a47..15ab34968fb0 100644 --- a/drivers/media/v4l2-core/v4l2-ioctl.c +++ b/drivers/media/v4l2-core/v4l2-ioctl.c @@ -1291,8 +1291,11 @@ static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 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 @@ static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 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 @@ static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 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 @@ static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 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)) { diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index 6ae7bbe988cc..9dc79d104d65 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -159,6 +159,8 @@ enum v4l2_tuner_type { V4L2_TUNER_RADIO = 1, V4L2_TUNER_ANALOG_TV = 2, V4L2_TUNER_DIGITAL_TV = 3, + V4L2_TUNER_ADC = 4, + V4L2_TUNER_RF = 5, }; enum v4l2_memory { -- 2.39.5