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1/*
2 * radio-timb.c Timberdale FPGA Radio driver
3 * Copyright (c) 2009 Intel Corporation
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19#include <linux/io.h>
20#include <media/v4l2-ioctl.h>
21#include <media/v4l2-device.h>
22#include <linux/platform_device.h>
23#include <linux/interrupt.h>
24#include <linux/slab.h>
25#include <linux/i2c.h>
26#include <linux/module.h>
27#include <media/timb_radio.h>
28
29#define DRIVER_NAME "timb-radio"
30
31struct timbradio {
32 struct timb_radio_platform_data pdata;
33 struct v4l2_subdev *sd_tuner;
34 struct v4l2_subdev *sd_dsp;
35 struct video_device video_dev;
36 struct v4l2_device v4l2_dev;
37 struct mutex lock;
38};
39
40
41static int timbradio_vidioc_querycap(struct file *file, void *priv,
42 struct v4l2_capability *v)
43{
44 strlcpy(v->driver, DRIVER_NAME, sizeof(v->driver));
45 strlcpy(v->card, "Timberdale Radio", sizeof(v->card));
46 snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);
47 v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
48 return 0;
49}
50
51static int timbradio_vidioc_g_tuner(struct file *file, void *priv,
52 struct v4l2_tuner *v)
53{
54 struct timbradio *tr = video_drvdata(file);
55 return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);
56}
57
58static int timbradio_vidioc_s_tuner(struct file *file, void *priv,
59 struct v4l2_tuner *v)
60{
61 struct timbradio *tr = video_drvdata(file);
62 return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);
63}
64
65static int timbradio_vidioc_g_input(struct file *filp, void *priv,
66 unsigned int *i)
67{
68 *i = 0;
69 return 0;
70}
71
72static int timbradio_vidioc_s_input(struct file *filp, void *priv,
73 unsigned int i)
74{
75 return i ? -EINVAL : 0;
76}
77
78static int timbradio_vidioc_g_audio(struct file *file, void *priv,
79 struct v4l2_audio *a)
80{
81 a->index = 0;
82 strlcpy(a->name, "Radio", sizeof(a->name));
83 a->capability = V4L2_AUDCAP_STEREO;
84 return 0;
85}
86
87static int timbradio_vidioc_s_audio(struct file *file, void *priv,
88 struct v4l2_audio *a)
89{
90 return a->index ? -EINVAL : 0;
91}
92
93static int timbradio_vidioc_s_frequency(struct file *file, void *priv,
94 struct v4l2_frequency *f)
95{
96 struct timbradio *tr = video_drvdata(file);
97 return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);
98}
99
100static int timbradio_vidioc_g_frequency(struct file *file, void *priv,
101 struct v4l2_frequency *f)
102{
103 struct timbradio *tr = video_drvdata(file);
104 return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);
105}
106
107static int timbradio_vidioc_queryctrl(struct file *file, void *priv,
108 struct v4l2_queryctrl *qc)
109{
110 struct timbradio *tr = video_drvdata(file);
111 return v4l2_subdev_call(tr->sd_dsp, core, queryctrl, qc);
112}
113
114static int timbradio_vidioc_g_ctrl(struct file *file, void *priv,
115 struct v4l2_control *ctrl)
116{
117 struct timbradio *tr = video_drvdata(file);
118 return v4l2_subdev_call(tr->sd_dsp, core, g_ctrl, ctrl);
119}
120
121static int timbradio_vidioc_s_ctrl(struct file *file, void *priv,
122 struct v4l2_control *ctrl)
123{
124 struct timbradio *tr = video_drvdata(file);
125 return v4l2_subdev_call(tr->sd_dsp, core, s_ctrl, ctrl);
126}
127
128static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {
129 .vidioc_querycap = timbradio_vidioc_querycap,
130 .vidioc_g_tuner = timbradio_vidioc_g_tuner,
131 .vidioc_s_tuner = timbradio_vidioc_s_tuner,
132 .vidioc_g_frequency = timbradio_vidioc_g_frequency,
133 .vidioc_s_frequency = timbradio_vidioc_s_frequency,
134 .vidioc_g_input = timbradio_vidioc_g_input,
135 .vidioc_s_input = timbradio_vidioc_s_input,
136 .vidioc_g_audio = timbradio_vidioc_g_audio,
137 .vidioc_s_audio = timbradio_vidioc_s_audio,
138 .vidioc_queryctrl = timbradio_vidioc_queryctrl,
139 .vidioc_g_ctrl = timbradio_vidioc_g_ctrl,
140 .vidioc_s_ctrl = timbradio_vidioc_s_ctrl
141};
142
143static const struct v4l2_file_operations timbradio_fops = {
144 .owner = THIS_MODULE,
145 .unlocked_ioctl = video_ioctl2,
146};
147
148static int __devinit timbradio_probe(struct platform_device *pdev)
149{
150 struct timb_radio_platform_data *pdata = pdev->dev.platform_data;
151 struct timbradio *tr;
152 int err;
153
154 if (!pdata) {
155 dev_err(&pdev->dev, "Platform data missing\n");
156 err = -EINVAL;
157 goto err;
158 }
159
160 tr = kzalloc(sizeof(*tr), GFP_KERNEL);
161 if (!tr) {
162 err = -ENOMEM;
163 goto err;
164 }
165
166 tr->pdata = *pdata;
167 mutex_init(&tr->lock);
168
169 strlcpy(tr->video_dev.name, "Timberdale Radio",
170 sizeof(tr->video_dev.name));
171 tr->video_dev.fops = &timbradio_fops;
172 tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
173 tr->video_dev.release = video_device_release_empty;
174 tr->video_dev.minor = -1;
175 tr->video_dev.lock = &tr->lock;
176
177 strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
178 err = v4l2_device_register(NULL, &tr->v4l2_dev);
179 if (err)
180 goto err_v4l2_dev;
181
182 tr->video_dev.v4l2_dev = &tr->v4l2_dev;
183
184 err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
185 if (err) {
186 dev_err(&pdev->dev, "Error reg video\n");
187 goto err_video_req;
188 }
189
190 video_set_drvdata(&tr->video_dev, tr);
191
192 platform_set_drvdata(pdev, tr);
193 return 0;
194
195err_video_req:
196 video_device_release_empty(&tr->video_dev);
197 v4l2_device_unregister(&tr->v4l2_dev);
198err_v4l2_dev:
199 kfree(tr);
200err:
201 dev_err(&pdev->dev, "Failed to register: %d\n", err);
202
203 return err;
204}
205
206static int __devexit timbradio_remove(struct platform_device *pdev)
207{
208 struct timbradio *tr = platform_get_drvdata(pdev);
209
210 video_unregister_device(&tr->video_dev);
211 video_device_release_empty(&tr->video_dev);
212
213 v4l2_device_unregister(&tr->v4l2_dev);
214
215 kfree(tr);
216
217 return 0;
218}
219
220static struct platform_driver timbradio_platform_driver = {
221 .driver = {
222 .name = DRIVER_NAME,
223 .owner = THIS_MODULE,
224 },
225 .probe = timbradio_probe,
226 .remove = __devexit_p(timbradio_remove),
227};
228
229module_platform_driver(timbradio_platform_driver);
230
231MODULE_DESCRIPTION("Timberdale Radio driver");
232MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
233MODULE_LICENSE("GPL v2");
234MODULE_VERSION("0.0.2");
235MODULE_ALIAS("platform:"DRIVER_NAME);