include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit...
[linux-3.10.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 };
38
39
40 static int timbradio_vidioc_querycap(struct file *file, void  *priv,
41         struct v4l2_capability *v)
42 {
43         strlcpy(v->driver, DRIVER_NAME, sizeof(v->driver));
44         strlcpy(v->card, "Timberdale Radio", sizeof(v->card));
45         snprintf(v->bus_info, sizeof(v->bus_info), "platform:"DRIVER_NAME);
46         v->version = KERNEL_VERSION(0, 0, 1);
47         v->capabilities = V4L2_CAP_TUNER | V4L2_CAP_RADIO;
48         return 0;
49 }
50
51 static 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
58 static 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
65 static int timbradio_vidioc_g_input(struct file *filp, void *priv,
66         unsigned int *i)
67 {
68         *i = 0;
69         return 0;
70 }
71
72 static int timbradio_vidioc_s_input(struct file *filp, void *priv,
73         unsigned int i)
74 {
75         return i ? -EINVAL : 0;
76 }
77
78 static 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
87 static int timbradio_vidioc_s_audio(struct file *file, void *priv,
88         struct v4l2_audio *a)
89 {
90         return a->index ? -EINVAL : 0;
91 }
92
93 static 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
100 static 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
107 static 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
114 static 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
121 static 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
128 static 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
143 static const struct v4l2_file_operations timbradio_fops = {
144         .owner          = THIS_MODULE,
145         .ioctl          = video_ioctl2,
146 };
147
148 static 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
168         strlcpy(tr->video_dev.name, "Timberdale Radio",
169                 sizeof(tr->video_dev.name));
170         tr->video_dev.fops = &timbradio_fops;
171         tr->video_dev.ioctl_ops = &timbradio_ioctl_ops;
172         tr->video_dev.release = video_device_release_empty;
173         tr->video_dev.minor = -1;
174
175         strlcpy(tr->v4l2_dev.name, DRIVER_NAME, sizeof(tr->v4l2_dev.name));
176         err = v4l2_device_register(NULL, &tr->v4l2_dev);
177         if (err)
178                 goto err_v4l2_dev;
179
180         tr->video_dev.v4l2_dev = &tr->v4l2_dev;
181
182         err = video_register_device(&tr->video_dev, VFL_TYPE_RADIO, -1);
183         if (err) {
184                 dev_err(&pdev->dev, "Error reg video\n");
185                 goto err_video_req;
186         }
187
188         video_set_drvdata(&tr->video_dev, tr);
189
190         platform_set_drvdata(pdev, tr);
191         return 0;
192
193 err_video_req:
194         video_device_release_empty(&tr->video_dev);
195         v4l2_device_unregister(&tr->v4l2_dev);
196 err_v4l2_dev:
197         kfree(tr);
198 err:
199         dev_err(&pdev->dev, "Failed to register: %d\n", err);
200
201         return err;
202 }
203
204 static int __devexit timbradio_remove(struct platform_device *pdev)
205 {
206         struct timbradio *tr = platform_get_drvdata(pdev);
207
208         video_unregister_device(&tr->video_dev);
209         video_device_release_empty(&tr->video_dev);
210
211         v4l2_device_unregister(&tr->v4l2_dev);
212
213         kfree(tr);
214
215         return 0;
216 }
217
218 static struct platform_driver timbradio_platform_driver = {
219         .driver = {
220                 .name   = DRIVER_NAME,
221                 .owner  = THIS_MODULE,
222         },
223         .probe          = timbradio_probe,
224         .remove         = timbradio_remove,
225 };
226
227 /*--------------------------------------------------------------------------*/
228
229 static int __init timbradio_init(void)
230 {
231         return platform_driver_register(&timbradio_platform_driver);
232 }
233
234 static void __exit timbradio_exit(void)
235 {
236         platform_driver_unregister(&timbradio_platform_driver);
237 }
238
239 module_init(timbradio_init);
240 module_exit(timbradio_exit);
241
242 MODULE_DESCRIPTION("Timberdale Radio driver");
243 MODULE_AUTHOR("Mocean Laboratories <info@mocean-labs.com>");
244 MODULE_LICENSE("GPL v2");
245 MODULE_ALIAS("platform:"DRIVER_NAME);