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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);
178
