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 void 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}
161
162static struct platform_driver timbradio_platform_driver = {
163	.driver = {
164		.name	= DRIVER_NAME,
165	},
166	.probe		= timbradio_probe,
167	.remove_new	= timbradio_remove,
168};
169
170module_platform_driver(timbradio_platform_driver);
171
172MODULE_DESCRIPTION("Timberdale Radio driver");
173MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
174MODULE_LICENSE("GPL v2");
175MODULE_VERSION("0.0.2");
176MODULE_ALIAS("platform:"DRIVER_NAME);
177