Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes
[pandora-kernel.git] / drivers / media / radio / radio-timb.c
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/version.h>
20 #include <linux/io.h>
21 #include <media/v4l2-ioctl.h>
22 #include <media/v4l2-device.h>
23 #include <linux/platform_device.h>
24 #include <linux/interrupt.h>
25 #include <linux/slab.h>
26 #include <linux/i2c.h>
27 #include <media/timb_radio.h>
28
29 #define DRIVER_NAME "timb-radio"
30
31 struct 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
41 static 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->version = KERNEL_VERSION(0, 0, 1);
48         v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
49         return 0;
50 }
51
52 static int timbradio_vidioc_g_tuner(struct file *file, void *priv,
53         struct v4l2_tuner *v)
54 {
55         struct timbradio *tr = video_drvdata(file);
56         return v4l2_subdev_call(tr->sd_tuner, tuner, g_tuner, v);
57 }
58
59 static int timbradio_vidioc_s_tuner(struct file *file, void *priv,
60         struct v4l2_tuner *v)
61 {
62         struct timbradio *tr = video_drvdata(file);
63         return v4l2_subdev_call(tr->sd_tuner, tuner, s_tuner, v);
64 }
65
66 static int timbradio_vidioc_g_input(struct file *filp, void *priv,
67         unsigned int *i)
68 {
69         *i = 0;
70         return 0;
71 }
72
73 static int timbradio_vidioc_s_input(struct file *filp, void *priv,
74         unsigned int i)
75 {
76         return i ? -EINVAL : 0;
77 }
78
79 static int timbradio_vidioc_g_audio(struct file *file, void *priv,
80         struct v4l2_audio *a)
81 {
82         a->index = 0;
83         strlcpy(a->name, "Radio", sizeof(a->name));
84         a->capability = V4L2_AUDCAP_STEREO;
85         return 0;
86 }
87
88 static int timbradio_vidioc_s_audio(struct file *file, void *priv,
89         struct v4l2_audio *a)
90 {
91         return a->index ? -EINVAL : 0;
92 }
93
94 static int timbradio_vidioc_s_frequency(struct file *file, void *priv,
95         struct v4l2_frequency *f)
96 {
97         struct timbradio *tr = video_drvdata(file);
98         return v4l2_subdev_call(tr->sd_tuner, tuner, s_frequency, f);
99 }
100
101 static int timbradio_vidioc_g_frequency(struct file *file, void *priv,
102         struct v4l2_frequency *f)
103 {
104         struct timbradio *tr = video_drvdata(file);
105         return v4l2_subdev_call(tr->sd_tuner, tuner, g_frequency, f);
106 }
107
108 static int timbradio_vidioc_queryctrl(struct file *file, void *priv,
109         struct v4l2_queryctrl *qc)
110 {
111         struct timbradio *tr = video_drvdata(file);
112         return v4l2_subdev_call(tr->sd_dsp, core, queryctrl, qc);
113 }
114
115 static int timbradio_vidioc_g_ctrl(struct file *file, void *priv,
116         struct v4l2_control *ctrl)
117 {
118         struct timbradio *tr = video_drvdata(file);
119         return v4l2_subdev_call(tr->sd_dsp, core, g_ctrl, ctrl);
120 }
121
122 static int timbradio_vidioc_s_ctrl(struct file *file, void *priv,
123         struct v4l2_control *ctrl)
124 {
125         struct timbradio *tr = video_drvdata(file);
126         return v4l2_subdev_call(tr->sd_dsp, core, s_ctrl, ctrl);
127 }
128
129 static const struct v4l2_ioctl_ops timbradio_ioctl_ops = {
130         .vidioc_querycap        = timbradio_vidioc_querycap,
131         .vidioc_g_tuner         = timbradio_vidioc_g_tuner,
132         .vidioc_s_tuner         = timbradio_vidioc_s_tuner,
133         .vidioc_g_frequency     = timbradio_vidioc_g_frequency,
134         .vidioc_s_frequency     = timbradio_vidioc_s_frequency,
135         .vidioc_g_input         = timbradio_vidioc_g_input,
136         .vidioc_s_input         = timbradio_vidioc_s_input,
137         .vidioc_g_audio         = timbradio_vidioc_g_audio,
138         .vidioc_s_audio         = timbradio_vidioc_s_audio,
139         .vidioc_queryctrl       = timbradio_vidioc_queryctrl,
140         .vidioc_g_ctrl          = timbradio_vidioc_g_ctrl,
141         .vidioc_s_ctrl          = timbradio_vidioc_s_ctrl
142 };
143
144 static const struct v4l2_file_operations timbradio_fops = {
145         .owner          = THIS_MODULE,
146         .unlocked_ioctl = video_ioctl2,
147 };
148
149 static int __devinit timbradio_probe(struct platform_device *pdev)
150 {
151         struct timb_radio_platform_data *pdata = pdev->dev.platform_data;
152         struct timbradio *tr;
153         int err;
154
155         if (!pdata) {
156                 dev_err(&pdev->dev, "Platform data missing\n");
157                 err = -EINVAL;
158                 goto err;
159         }
160
161         tr = kzalloc(sizeof(*tr), GFP_KERNEL);
162         if (!tr) {
163                 err = -ENOMEM;
164                 goto err;
165         }
166
167         tr->pdata = *pdata;
168         mutex_init(&tr->lock);
169
170         strlcpy(tr->video_dev.name, "Timberdale Radio",
171                 sizeof(tr->video_dev.name));
172         tr->video_dev.fops = &timbradio_fops;
173         tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
174         tr->video_dev.release = video_device_release_empty;
175         tr->video_dev.minor = -1;
176         tr->video_dev.lock = &tr->lock;
177
178         strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
179         err = v4l2_device_register(NULL, &tr->v4l2_dev);
180         if (err)
181                 goto err_v4l2_dev;
182
183         tr->video_dev.v4l2_dev = &tr->v4l2_dev;
184
185         err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
186         if (err) {
187                 dev_err(&pdev->dev, "Error reg video\n");
188                 goto err_video_req;
189         }
190
191         video_set_drvdata(&tr->video_dev, tr);
192
193         platform_set_drvdata(pdev, tr);
194         return 0;
195
196 err_video_req:
197         video_device_release_empty(&tr->video_dev);
198         v4l2_device_unregister(&tr->v4l2_dev);
199 err_v4l2_dev:
200         kfree(tr);
201 err:
202         dev_err(&pdev->dev, "Failed to register: %d\n", err);
203
204         return err;
205 }
206
207 static int __devexit timbradio_remove(struct platform_device *pdev)
208 {
209         struct timbradio *tr = platform_get_drvdata(pdev);
210
211         video_unregister_device(&tr->video_dev);
212         video_device_release_empty(&tr->video_dev);
213
214         v4l2_device_unregister(&tr->v4l2_dev);
215
216         kfree(tr);
217
218         return 0;
219 }
220
221 static struct platform_driver timbradio_platform_driver = {
222         .driver = {
223                 .name   = DRIVER_NAME,
224                 .owner  = THIS_MODULE,
225         },
226         .probe          = timbradio_probe,
227         .remove         = timbradio_remove,
228 };
229
230 /*--------------------------------------------------------------------------*/
231
232 static int __init timbradio_init(void)
233 {
234         return platform_driver_register(&timbradio_platform_driver);
235 }
236
237 static void __exit timbradio_exit(void)
238 {
239         platform_driver_unregister(&timbradio_platform_driver);
240 }
241
242 module_init(timbradio_init);
243 module_exit(timbradio_exit);
244
245 MODULE_DESCRIPTION("Timberdale Radio driver");
246 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
247 MODULE_LICENSE("GPL v2");
248 MODULE_ALIAS("platform:"DRIVER_NAME);