cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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radio-timb.c (4793B)


      1// SPDX-License-Identifier: GPL-2.0-only
      2/*
      3 * radio-timb.c Timberdale FPGA Radio driver
      4 * Copyright (c) 2009 Intel Corporation
      5 */
      6
      7#include <linux/io.h>
      8#include <media/v4l2-ioctl.h>
      9#include <media/v4l2-device.h>
     10#include <media/v4l2-ctrls.h>
     11#include <media/v4l2-event.h>
     12#include <linux/platform_device.h>
     13#include <linux/interrupt.h>
     14#include <linux/slab.h>
     15#include <linux/i2c.h>
     16#include <linux/module.h>
     17#include <linux/platform_data/media/timb_radio.h>
     18
     19#define DRIVER_NAME "timb-radio"
     20
     21struct timbradio {
     22	struct timb_radio_platform_data	pdata;
     23	struct v4l2_subdev	*sd_tuner;
     24	struct v4l2_subdev	*sd_dsp;
     25	struct video_device	video_dev;
     26	struct v4l2_device	v4l2_dev;
     27	struct mutex		lock;
     28};
     29
     30
     31static int timbradio_vidioc_querycap(struct file *file, void  *priv,
     32	struct v4l2_capability *v)
     33{
     34	strscpy(v->driver, DRIVER_NAME, sizeof(v->driver));
     35	strscpy(v->card, "Timberdale Radio", sizeof(v->card));
     36	snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);
     37	return 0;
     38}
     39
     40static int timbradio_vidioc_g_tuner(struct file *file, void *priv,
     41	struct v4l2_tuner *v)
     42{
     43	struct timbradio *tr = video_drvdata(file);
     44	return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);
     45}
     46
     47static int timbradio_vidioc_s_tuner(struct file *file, void *priv,
     48	const struct v4l2_tuner *v)
     49{
     50	struct timbradio *tr = video_drvdata(file);
     51	return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);
     52}
     53
     54static int timbradio_vidioc_s_frequency(struct file *file, void *priv,
     55	const struct v4l2_frequency *f)
     56{
     57	struct timbradio *tr = video_drvdata(file);
     58	return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);
     59}
     60
     61static int timbradio_vidioc_g_frequency(struct file *file, void *priv,
     62	struct v4l2_frequency *f)
     63{
     64	struct timbradio *tr = video_drvdata(file);
     65	return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);
     66}
     67
     68static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {
     69	.vidioc_querycap	= timbradio_vidioc_querycap,
     70	.vidioc_g_tuner		= timbradio_vidioc_g_tuner,
     71	.vidioc_s_tuner		= timbradio_vidioc_s_tuner,
     72	.vidioc_g_frequency	= timbradio_vidioc_g_frequency,
     73	.vidioc_s_frequency	= timbradio_vidioc_s_frequency,
     74	.vidioc_log_status      = v4l2_ctrl_log_status,
     75	.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
     76	.vidioc_unsubscribe_event = v4l2_event_unsubscribe,
     77};
     78
     79static const struct v4l2_file_operations timbradio_fops = {
     80	.owner		= THIS_MODULE,
     81	.open		= v4l2_fh_open,
     82	.release	= v4l2_fh_release,
     83	.poll		= v4l2_ctrl_poll,
     84	.unlocked_ioctl	= video_ioctl2,
     85};
     86
     87static int timbradio_probe(struct platform_device *pdev)
     88{
     89	struct timb_radio_platform_data *pdata = pdev->dev.platform_data;
     90	struct timbradio *tr;
     91	int err;
     92
     93	if (!pdata) {
     94		dev_err(&pdev->dev, "Platform data missing\n");
     95		err = -EINVAL;
     96		goto err;
     97	}
     98
     99	tr = devm_kzalloc(&pdev->dev, sizeof(*tr), GFP_KERNEL);
    100	if (!tr) {
    101		err = -ENOMEM;
    102		goto err;
    103	}
    104
    105	tr->pdata = *pdata;
    106	mutex_init(&tr->lock);
    107
    108	strscpy(tr->video_dev.name, "Timberdale Radio",
    109		sizeof(tr->video_dev.name));
    110	tr->video_dev.fops = &timbradio_fops;
    111	tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
    112	tr->video_dev.release = video_device_release_empty;
    113	tr->video_dev.minor = -1;
    114	tr->video_dev.lock = &tr->lock;
    115	tr->video_dev.device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
    116
    117	strscpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
    118	err = v4l2_device_register(NULL, &tr->v4l2_dev);
    119	if (err)
    120		goto err;
    121
    122	tr->video_dev.v4l2_dev = &tr->v4l2_dev;
    123
    124	tr->sd_tuner = v4l2_i2c_new_subdev_board(&tr->v4l2_dev,
    125		i2c_get_adapter(pdata->i2c_adapter), pdata->tuner, NULL);
    126	tr->sd_dsp = v4l2_i2c_new_subdev_board(&tr->v4l2_dev,
    127		i2c_get_adapter(pdata->i2c_adapter), pdata->dsp, NULL);
    128	if (tr->sd_tuner == NULL || tr->sd_dsp == NULL) {
    129		err = -ENODEV;
    130		goto err_video_req;
    131	}
    132
    133	tr->v4l2_dev.ctrl_handler = tr->sd_dsp->ctrl_handler;
    134
    135	err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
    136	if (err) {
    137		dev_err(&pdev->dev, "Error reg video\n");
    138		goto err_video_req;
    139	}
    140
    141	video_set_drvdata(&tr->video_dev, tr);
    142
    143	platform_set_drvdata(pdev, tr);
    144	return 0;
    145
    146err_video_req:
    147	v4l2_device_unregister(&tr->v4l2_dev);
    148err:
    149	dev_err(&pdev->dev, "Failed to register: %d\n", err);
    150
    151	return err;
    152}
    153
    154static int timbradio_remove(struct platform_device *pdev)
    155{
    156	struct timbradio *tr = platform_get_drvdata(pdev);
    157
    158	video_unregister_device(&tr->video_dev);
    159	v4l2_device_unregister(&tr->v4l2_dev);
    160	return 0;
    161}
    162
    163static struct platform_driver timbradio_platform_driver = {
    164	.driver = {
    165		.name	= DRIVER_NAME,
    166	},
    167	.probe		= timbradio_probe,
    168	.remove		= timbradio_remove,
    169};
    170
    171module_platform_driver(timbradio_platform_driver);
    172
    173MODULE_DESCRIPTION("Timberdale Radio driver");
    174MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
    175MODULE_LICENSE("GPL v2");
    176MODULE_VERSION("0.0.2");
    177MODULE_ALIAS("platform:"DRIVER_NAME);