![Mauro Carvalho Chehab](/assets/img/avatar_default.png)
The implementation of strscpy() is more robust and safer. That's now the recommended way to copy NUL terminated strings. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
187 lines
5.1 KiB
C
187 lines
5.1 KiB
C
/*
|
|
* radio-timb.c Timberdale FPGA Radio driver
|
|
* Copyright (c) 2009 Intel Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#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);
|