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// SPDX-License-Identifier: GPL-2.0-only
/*
* radio-timb.c Timberdale FPGA Radio driver
* Copyright (c) 2009 Intel Corporation
*/
#include <linux/io.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-device.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-event.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/platform_data/media/timb_radio.h>
#define DRIVER_NAME "timb-radio"
struct timbradio {
struct timb_radio_platform_data pdata;
struct v4l2_subdev *sd_tuner;
struct v4l2_subdev *sd_dsp;
struct video_device video_dev;
struct v4l2_device v4l2_dev;
struct mutex lock;
};
static int timbradio_vidioc_querycap(struct file *file, void *priv,
struct v4l2_capability *v)
{
strscpy(v->driver, DRIVER_NAME, sizeof(v->driver));
strscpy(v->card, "Timberdale Radio", sizeof(v->card));
snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);
v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
static int timbradio_vidioc_g_tuner(struct file *file, void *priv,
struct v4l2_tuner *v)
{
struct timbradio *tr = video_drvdata(file);
return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);
}
static int timbradio_vidioc_s_tuner(struct file *file, void *priv,
const struct v4l2_tuner *v)
{
struct timbradio *tr = video_drvdata(file);
return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);
}
static int timbradio_vidioc_s_frequency(struct file *file, void *priv,
const struct v4l2_frequency *f)
{
struct timbradio *tr = video_drvdata(file);
return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);
}
static int timbradio_vidioc_g_frequency(struct file *file, void *priv,
struct v4l2_frequency *f)
{
struct timbradio *tr = video_drvdata(file);
return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);
}
static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {
.vidioc_querycap = timbradio_vidioc_querycap,
.vidioc_g_tuner = timbradio_vidioc_g_tuner,
.vidioc_s_tuner = timbradio_vidioc_s_tuner,
.vidioc_g_frequency = timbradio_vidioc_g_frequency,
.vidioc_s_frequency = timbradio_vidioc_s_frequency,
.vidioc_log_status = v4l2_ctrl_log_status,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
};
static const struct v4l2_file_operations timbradio_fops = {
.owner = THIS_MODULE,
.open = v4l2_fh_open,
.release = v4l2_fh_release,
.poll = v4l2_ctrl_poll,
.unlocked_ioctl = video_ioctl2,
};
static int timbradio_probe(struct platform_device *pdev)
{
struct timb_radio_platform_data *pdata = pdev->dev.platform_data;
struct timbradio *tr;
int err;
if (!pdata) {
dev_err(&pdev->dev, "Platform data missing\n");
err = -EINVAL;
goto err;
}
tr = devm_kzalloc(&pdev->dev, sizeof(*tr), GFP_KERNEL);
if (!tr) {
err = -ENOMEM;
goto err;
}
tr->pdata = *pdata;
mutex_init(&tr->lock);
strscpy(tr->video_dev.name, "Timberdale Radio",
sizeof(tr->video_dev.name));
tr->video_dev.fops = &timbradio_fops;
tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
tr->video_dev.release = video_device_release_empty;
tr->video_dev.minor = -1;
tr->video_dev.lock = &tr->lock;
strscpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
err = v4l2_device_register(NULL, &tr->v4l2_dev);
if (err)
goto err;
tr->video_dev.v4l2_dev = &tr->v4l2_dev;
tr->sd_tuner = v4l2_i2c_new_subdev_board(&tr->v4l2_dev,
i2c_get_adapter(pdata->i2c_adapter), pdata->tuner, NULL);
tr->sd_dsp = v4l2_i2c_new_subdev_board(&tr->v4l2_dev,
i2c_get_adapter(pdata->i2c_adapter), pdata->dsp, NULL);
if (tr->sd_tuner == NULL || tr->sd_dsp == NULL) {
err = -ENODEV;
goto err_video_req;
}
tr->v4l2_dev.ctrl_handler = tr->sd_dsp->ctrl_handler;
err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
if (err) {
dev_err(&pdev->dev, "Error reg video\n");
goto err_video_req;
}
video_set_drvdata(&tr->video_dev, tr);
platform_set_drvdata(pdev, tr);
return 0;
err_video_req:
v4l2_device_unregister(&tr->v4l2_dev);
err:
dev_err(&pdev->dev, "Failed to register: %d\n", err);
return err;
}
static int timbradio_remove(struct platform_device *pdev)
{
struct timbradio *tr = platform_get_drvdata(pdev);
video_unregister_device(&tr->video_dev);
v4l2_device_unregister(&tr->v4l2_dev);
return 0;
}
static struct platform_driver timbradio_platform_driver = {
.driver = {
.name = DRIVER_NAME,
},
.probe = timbradio_probe,
.remove = timbradio_remove,
};
module_platform_driver(timbradio_platform_driver);
MODULE_DESCRIPTION("Timberdale Radio driver");
MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
MODULE_LICENSE("GPL v2");
MODULE_VERSION("0.0.2");
MODULE_ALIAS("platform:"DRIVER_NAME);
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