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/*
* vivid-sdr-common.c - software defined radio support functions.
*
* Copyright 2014 Cisco Systems, Inc. and/or its affiliates. All rights reserved.
*
* This program is free software; you may redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/kthread.h>
#include <linux/freezer.h>
#include <linux/math64.h>
#include <linux/videodev2.h>
#include <linux/v4l2-dv-timings.h>
#include <media/v4l2-common.h>
#include <media/v4l2-event.h>
#include <media/v4l2-dv-timings.h>
#include <linux/fixp-arith.h>
#include "vivid-core.h"
#include "vivid-ctrls.h"
#include "vivid-sdr-common.h"
/* format descriptions for capture and preview */
static const struct vivid_sdr_fmt formats[] = {
{
.pixelformat = V4L2_SDR_FMT_CU8,
.buffersize = SDR_SAMPLES_PER_BUF * 2,
}, {
.pixelformat = V4L2_SDR_FMT_CS8,
.buffersize = SDR_SAMPLES_PER_BUF * 2,
},
};
static const unsigned int NUM_FORMATS = ARRAY_SIZE(formats);
static const struct v4l2_frequency_band bands_adc[] = {
{
.tuner = 0,
.type = V4L2_TUNER_SDR,
.index = 0,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 300000,
.rangehigh = 300000,
},
{
.tuner = 0,
.type = V4L2_TUNER_SDR,
.index = 1,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 900001,
.rangehigh = 2800000,
},
{
.tuner = 0,
.type = V4L2_TUNER_SDR,
.index = 2,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 3200000,
.rangehigh = 3200000,
},
};
/* ADC band midpoints */
#define BAND_ADC_0 ((bands_adc[0].rangehigh + bands_adc[1].rangelow) / 2)
#define BAND_ADC_1 ((bands_adc[1].rangehigh + bands_adc[2].rangelow) / 2)
static const struct v4l2_frequency_band bands_fm[] = {
{
.tuner = 1,
.type = V4L2_TUNER_RF,
.index = 0,
.capability = V4L2_TUNER_CAP_1HZ | V4L2_TUNER_CAP_FREQ_BANDS,
.rangelow = 50000000,
.rangehigh = 2000000000,
},
};
const struct vivid_sdr_fmt *vivid_sdr_get_format(struct vivid_dev *dev, u32 pixelformat)
{
const struct vivid_sdr_fmt *fmt;
unsigned k;
for (k = 0; k < ARRAY_SIZE(formats); k++) {
fmt = &formats[k];
if (fmt->pixelformat == pixelformat)
return fmt;
}
return NULL;
}
int vivid_sdr_enum_freq_bands(struct file *file, void *fh,
struct v4l2_frequency_band *band)
{
switch (band->tuner) {
case 0:
if (band->index >= ARRAY_SIZE(bands_adc))
return -EINVAL;
*band = bands_adc[band->index];
return 0;
case 1:
if (band->index >= ARRAY_SIZE(bands_fm))
return -EINVAL;
*band = bands_fm[band->index];
return 0;
default:
return -EINVAL;
}
}
int vivid_enum_fmt_sdr(struct file *file, void *fh, struct v4l2_fmtdesc *f)
{
if (f->index >= ARRAY_SIZE(formats))
return -EINVAL;
f->pixelformat = formats[f->index].pixelformat;
return 0;
}
int vivid_try_fmt_sdr(struct file *file, void *fh, struct v4l2_format *f)
{
struct vivid_dev *dev = video_drvdata(file);
const struct vivid_sdr_fmt *fmt;
int i;
memset(f->fmt.sdr.reserved, 0, sizeof(f->fmt.sdr.reserved));
fmt = vivid_sdr_get_format(dev, f->fmt.sdr.pixelformat);
if (fmt == NULL)
fmt = &formats[0];
f->fmt.sdr.pixelformat = fmt->pixelformat;
f->fmt.sdr.buffersize = fmt->buffersize;
return 0;
}
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