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d44d1f3b RR |
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> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
d44d1f3b RR |
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; | |
4f68775b | 37 | struct mutex lock; |
d44d1f3b RR |
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, | |
4f68775b | 146 | .unlocked_ioctl = video_ioctl2, |
d44d1f3b RR |
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; | |
4f68775b | 168 | mutex_init(&tr->lock); |
d44d1f3b RR |
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; | |
4f68775b | 176 | tr->video_dev.lock = &tr->lock; |
d44d1f3b RR |
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); |