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19#include <linux/io.h>
20#include <media/v4l2-ioctl.h>
21#include <media/v4l2-device.h>
22#include <media/v4l2-ctrls.h>
23#include <media/v4l2-event.h>
24#include <linux/platform_device.h>
25#include <linux/interrupt.h>
26#include <linux/slab.h>
27#include <linux/i2c.h>
28#include <linux/module.h>
29#include <media/timb_radio.h>
30
31#define DRIVER_NAME "timb-radio"
32
33struct timbradio {
34 struct timb_radio_platform_data pdata;
35 struct v4l2_subdev *sd_tuner;
36 struct v4l2_subdev *sd_dsp;
37 struct video_device video_dev;
38 struct v4l2_device v4l2_dev;
39 struct mutex lock;
40};
41
42
43static int timbradio_vidioc_querycap(struct file *file, void *priv,
44 struct v4l2_capability *v)
45{
46 strlcpy(v->driver, DRIVER_NAME, sizeof(v->driver));
47 strlcpy(v->card, "Timberdale Radio", sizeof(v->card));
48 snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);
49 v->device_caps = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
50 v->capabilities = v->device_caps | V4L2_CAP_DEVICE_CAPS;
51 return 0;
52}
53
54static int timbradio_vidioc_g_tuner(struct file *file, void *priv,
55 struct v4l2_tuner *v)
56{
57 struct timbradio *tr = video_drvdata(file);
58 return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);
59}
60
61static int timbradio_vidioc_s_tuner(struct file *file, void *priv,
62 const struct v4l2_tuner *v)
63{
64 struct timbradio *tr = video_drvdata(file);
65 return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);
66}
67
68static int timbradio_vidioc_s_frequency(struct file *file, void *priv,
69 const struct v4l2_frequency *f)
70{
71 struct timbradio *tr = video_drvdata(file);
72 return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);
73}
74
75static int timbradio_vidioc_g_frequency(struct file *file, void *priv,
76 struct v4l2_frequency *f)
77{
78 struct timbradio *tr = video_drvdata(file);
79 return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);
80}
81
82static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {
83 .vidioc_querycap = timbradio_vidioc_querycap,
84 .vidioc_g_tuner = timbradio_vidioc_g_tuner,
85 .vidioc_s_tuner = timbradio_vidioc_s_tuner,
86 .vidioc_g_frequency = timbradio_vidioc_g_frequency,
87 .vidioc_s_frequency = timbradio_vidioc_s_frequency,
88 .vidioc_log_status = v4l2_ctrl_log_status,
89 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
90 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
91};
92
93static const struct v4l2_file_operations timbradio_fops = {
94 .owner = THIS_MODULE,
95 .open = v4l2_fh_open,
96 .release = v4l2_fh_release,
97 .poll = v4l2_ctrl_poll,
98 .unlocked_ioctl = video_ioctl2,
99};
100
101static int timbradio_probe(struct platform_device *pdev)
102{
103 struct timb_radio_platform_data *pdata = pdev->dev.platform_data;
104 struct timbradio *tr;
105 int err;
106
107 if (!pdata) {
108 dev_err(&pdev->dev, "Platform data missing\n");
109 err = -EINVAL;
110 goto err;
111 }
112
113 tr = devm_kzalloc(&pdev->dev, sizeof(*tr), GFP_KERNEL);
114 if (!tr) {
115 err = -ENOMEM;
116 goto err;
117 }
118
119 tr->pdata = *pdata;
120 mutex_init(&tr->lock);
121
122 strlcpy(tr->video_dev.name, "Timberdale Radio",
123 sizeof(tr->video_dev.name));
124 tr->video_dev.fops = &timbradio_fops;
125 tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
126 tr->video_dev.release = video_device_release_empty;
127 tr->video_dev.minor = -1;
128 tr->video_dev.lock = &tr->lock;
129 set_bit(V4L2_FL_USE_FH_PRIO, &tr->video_dev.flags);
130
131 strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
132 err = v4l2_device_register(NULL, &tr->v4l2_dev);
133 if (err)
134 goto err;
135
136 tr->video_dev.v4l2_dev = &tr->v4l2_dev;
137
138 tr->sd_tuner = v4l2_i2c_new_subdev_board(&tr->v4l2_dev,
139 i2c_get_adapter(pdata->i2c_adapter), pdata->tuner, NULL);
140 tr->sd_dsp = v4l2_i2c_new_subdev_board(&tr->v4l2_dev,
141 i2c_get_adapter(pdata->i2c_adapter), pdata->dsp, NULL);
142 if (tr->sd_tuner == NULL || tr->sd_dsp == NULL)
143 goto err_video_req;
144
145 tr->v4l2_dev.ctrl_handler = tr->sd_dsp->ctrl_handler;
146
147 err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
148 if (err) {
149 dev_err(&pdev->dev, "Error reg video\n");
150 goto err_video_req;
151 }
152
153 video_set_drvdata(&tr->video_dev, tr);
154
155 platform_set_drvdata(pdev, tr);
156 return 0;
157
158err_video_req:
159 v4l2_device_unregister(&tr->v4l2_dev);
160err:
161 dev_err(&pdev->dev, "Failed to register: %d\n", err);
162
163 return err;
164}
165
166static int timbradio_remove(struct platform_device *pdev)
167{
168 struct timbradio *tr = platform_get_drvdata(pdev);
169
170 video_unregister_device(&tr->video_dev);
171 v4l2_device_unregister(&tr->v4l2_dev);
172 return 0;
173}
174
175static struct platform_driver timbradio_platform_driver = {
176 .driver = {
177 .name = DRIVER_NAME,
178 .owner = THIS_MODULE,
179 },
180 .probe = timbradio_probe,
181 .remove = timbradio_remove,
182};
183
184module_platform_driver(timbradio_platform_driver);
185
186MODULE_DESCRIPTION("Timberdale Radio driver");
187MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
188MODULE_LICENSE("GPL v2");
189MODULE_VERSION("0.0.2");
190MODULE_ALIAS("platform:"DRIVER_NAME);
191
