diff options
author | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
---|---|---|
committer | Jonathan Herman <hermanjl@cs.unc.edu> | 2013-01-22 10:38:37 -0500 |
commit | fcc9d2e5a6c89d22b8b773a64fb4ad21ac318446 (patch) | |
tree | a57612d1888735a2ec7972891b68c1ac5ec8faea /drivers/media/video/v4l2-subdev.c | |
parent | 8dea78da5cee153b8af9c07a2745f6c55057fe12 (diff) |
Diffstat (limited to 'drivers/media/video/v4l2-subdev.c')
-rw-r--r-- | drivers/media/video/v4l2-subdev.c | 319 |
1 files changed, 319 insertions, 0 deletions
diff --git a/drivers/media/video/v4l2-subdev.c b/drivers/media/video/v4l2-subdev.c new file mode 100644 index 00000000000..b7967c9dc4a --- /dev/null +++ b/drivers/media/video/v4l2-subdev.c | |||
@@ -0,0 +1,319 @@ | |||
1 | /* | ||
2 | * V4L2 sub-device | ||
3 | * | ||
4 | * Copyright (C) 2010 Nokia Corporation | ||
5 | * | ||
6 | * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> | ||
7 | * Sakari Ailus <sakari.ailus@iki.fi> | ||
8 | * | ||
9 | * This program is free software; you can redistribute it and/or modify | ||
10 | * it under the terms of the GNU General Public License version 2 as | ||
11 | * published by the Free Software Foundation. | ||
12 | * | ||
13 | * This program is distributed in the hope that it will be useful, | ||
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
16 | * GNU General Public License for more details. | ||
17 | * | ||
18 | * You should have received a copy of the GNU General Public License | ||
19 | * along with this program; if not, write to the Free Software | ||
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
21 | */ | ||
22 | |||
23 | #include <linux/ioctl.h> | ||
24 | #include <linux/slab.h> | ||
25 | #include <linux/types.h> | ||
26 | #include <linux/videodev2.h> | ||
27 | |||
28 | #include <media/v4l2-ctrls.h> | ||
29 | #include <media/v4l2-device.h> | ||
30 | #include <media/v4l2-ioctl.h> | ||
31 | #include <media/v4l2-fh.h> | ||
32 | #include <media/v4l2-event.h> | ||
33 | |||
34 | static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd) | ||
35 | { | ||
36 | #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) | ||
37 | /* Allocate try format and crop in the same memory block */ | ||
38 | fh->try_fmt = kzalloc((sizeof(*fh->try_fmt) + sizeof(*fh->try_crop)) | ||
39 | * sd->entity.num_pads, GFP_KERNEL); | ||
40 | if (fh->try_fmt == NULL) | ||
41 | return -ENOMEM; | ||
42 | |||
43 | fh->try_crop = (struct v4l2_rect *) | ||
44 | (fh->try_fmt + sd->entity.num_pads); | ||
45 | #endif | ||
46 | return 0; | ||
47 | } | ||
48 | |||
49 | static void subdev_fh_free(struct v4l2_subdev_fh *fh) | ||
50 | { | ||
51 | #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) | ||
52 | kfree(fh->try_fmt); | ||
53 | fh->try_fmt = NULL; | ||
54 | fh->try_crop = NULL; | ||
55 | #endif | ||
56 | } | ||
57 | |||
58 | static int subdev_open(struct file *file) | ||
59 | { | ||
60 | struct video_device *vdev = video_devdata(file); | ||
61 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | ||
62 | struct v4l2_subdev_fh *subdev_fh; | ||
63 | #if defined(CONFIG_MEDIA_CONTROLLER) | ||
64 | struct media_entity *entity = NULL; | ||
65 | #endif | ||
66 | int ret; | ||
67 | |||
68 | subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL); | ||
69 | if (subdev_fh == NULL) | ||
70 | return -ENOMEM; | ||
71 | |||
72 | ret = subdev_fh_init(subdev_fh, sd); | ||
73 | if (ret) { | ||
74 | kfree(subdev_fh); | ||
75 | return ret; | ||
76 | } | ||
77 | |||
78 | v4l2_fh_init(&subdev_fh->vfh, vdev); | ||
79 | v4l2_fh_add(&subdev_fh->vfh); | ||
80 | file->private_data = &subdev_fh->vfh; | ||
81 | #if defined(CONFIG_MEDIA_CONTROLLER) | ||
82 | if (sd->v4l2_dev->mdev) { | ||
83 | entity = media_entity_get(&sd->entity); | ||
84 | if (!entity) { | ||
85 | ret = -EBUSY; | ||
86 | goto err; | ||
87 | } | ||
88 | } | ||
89 | #endif | ||
90 | |||
91 | if (sd->internal_ops && sd->internal_ops->open) { | ||
92 | ret = sd->internal_ops->open(sd, subdev_fh); | ||
93 | if (ret < 0) | ||
94 | goto err; | ||
95 | } | ||
96 | |||
97 | return 0; | ||
98 | |||
99 | err: | ||
100 | #if defined(CONFIG_MEDIA_CONTROLLER) | ||
101 | if (entity) | ||
102 | media_entity_put(entity); | ||
103 | #endif | ||
104 | v4l2_fh_del(&subdev_fh->vfh); | ||
105 | v4l2_fh_exit(&subdev_fh->vfh); | ||
106 | subdev_fh_free(subdev_fh); | ||
107 | kfree(subdev_fh); | ||
108 | |||
109 | return ret; | ||
110 | } | ||
111 | |||
112 | static int subdev_close(struct file *file) | ||
113 | { | ||
114 | struct video_device *vdev = video_devdata(file); | ||
115 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | ||
116 | struct v4l2_fh *vfh = file->private_data; | ||
117 | struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); | ||
118 | |||
119 | if (sd->internal_ops && sd->internal_ops->close) | ||
120 | sd->internal_ops->close(sd, subdev_fh); | ||
121 | #if defined(CONFIG_MEDIA_CONTROLLER) | ||
122 | if (sd->v4l2_dev->mdev) | ||
123 | media_entity_put(&sd->entity); | ||
124 | #endif | ||
125 | v4l2_fh_del(vfh); | ||
126 | v4l2_fh_exit(vfh); | ||
127 | subdev_fh_free(subdev_fh); | ||
128 | kfree(subdev_fh); | ||
129 | file->private_data = NULL; | ||
130 | |||
131 | return 0; | ||
132 | } | ||
133 | |||
134 | static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) | ||
135 | { | ||
136 | struct video_device *vdev = video_devdata(file); | ||
137 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | ||
138 | struct v4l2_fh *vfh = file->private_data; | ||
139 | #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) | ||
140 | struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); | ||
141 | #endif | ||
142 | |||
143 | switch (cmd) { | ||
144 | case VIDIOC_QUERYCTRL: | ||
145 | return v4l2_queryctrl(vfh->ctrl_handler, arg); | ||
146 | |||
147 | case VIDIOC_QUERYMENU: | ||
148 | return v4l2_querymenu(vfh->ctrl_handler, arg); | ||
149 | |||
150 | case VIDIOC_G_CTRL: | ||
151 | return v4l2_g_ctrl(vfh->ctrl_handler, arg); | ||
152 | |||
153 | case VIDIOC_S_CTRL: | ||
154 | return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg); | ||
155 | |||
156 | case VIDIOC_G_EXT_CTRLS: | ||
157 | return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg); | ||
158 | |||
159 | case VIDIOC_S_EXT_CTRLS: | ||
160 | return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg); | ||
161 | |||
162 | case VIDIOC_TRY_EXT_CTRLS: | ||
163 | return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg); | ||
164 | |||
165 | case VIDIOC_DQEVENT: | ||
166 | if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) | ||
167 | return -ENOIOCTLCMD; | ||
168 | |||
169 | return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK); | ||
170 | |||
171 | case VIDIOC_SUBSCRIBE_EVENT: | ||
172 | return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg); | ||
173 | |||
174 | case VIDIOC_UNSUBSCRIBE_EVENT: | ||
175 | return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg); | ||
176 | #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) | ||
177 | case VIDIOC_SUBDEV_G_FMT: { | ||
178 | struct v4l2_subdev_format *format = arg; | ||
179 | |||
180 | if (format->which != V4L2_SUBDEV_FORMAT_TRY && | ||
181 | format->which != V4L2_SUBDEV_FORMAT_ACTIVE) | ||
182 | return -EINVAL; | ||
183 | |||
184 | if (format->pad >= sd->entity.num_pads) | ||
185 | return -EINVAL; | ||
186 | |||
187 | return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format); | ||
188 | } | ||
189 | |||
190 | case VIDIOC_SUBDEV_S_FMT: { | ||
191 | struct v4l2_subdev_format *format = arg; | ||
192 | |||
193 | if (format->which != V4L2_SUBDEV_FORMAT_TRY && | ||
194 | format->which != V4L2_SUBDEV_FORMAT_ACTIVE) | ||
195 | return -EINVAL; | ||
196 | |||
197 | if (format->pad >= sd->entity.num_pads) | ||
198 | return -EINVAL; | ||
199 | |||
200 | return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format); | ||
201 | } | ||
202 | |||
203 | case VIDIOC_SUBDEV_G_CROP: { | ||
204 | struct v4l2_subdev_crop *crop = arg; | ||
205 | |||
206 | if (crop->which != V4L2_SUBDEV_FORMAT_TRY && | ||
207 | crop->which != V4L2_SUBDEV_FORMAT_ACTIVE) | ||
208 | return -EINVAL; | ||
209 | |||
210 | if (crop->pad >= sd->entity.num_pads) | ||
211 | return -EINVAL; | ||
212 | |||
213 | return v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop); | ||
214 | } | ||
215 | |||
216 | case VIDIOC_SUBDEV_S_CROP: { | ||
217 | struct v4l2_subdev_crop *crop = arg; | ||
218 | |||
219 | if (crop->which != V4L2_SUBDEV_FORMAT_TRY && | ||
220 | crop->which != V4L2_SUBDEV_FORMAT_ACTIVE) | ||
221 | return -EINVAL; | ||
222 | |||
223 | if (crop->pad >= sd->entity.num_pads) | ||
224 | return -EINVAL; | ||
225 | |||
226 | return v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop); | ||
227 | } | ||
228 | |||
229 | case VIDIOC_SUBDEV_ENUM_MBUS_CODE: { | ||
230 | struct v4l2_subdev_mbus_code_enum *code = arg; | ||
231 | |||
232 | if (code->pad >= sd->entity.num_pads) | ||
233 | return -EINVAL; | ||
234 | |||
235 | return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh, | ||
236 | code); | ||
237 | } | ||
238 | |||
239 | case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: { | ||
240 | struct v4l2_subdev_frame_size_enum *fse = arg; | ||
241 | |||
242 | if (fse->pad >= sd->entity.num_pads) | ||
243 | return -EINVAL; | ||
244 | |||
245 | return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh, | ||
246 | fse); | ||
247 | } | ||
248 | |||
249 | case VIDIOC_SUBDEV_G_FRAME_INTERVAL: | ||
250 | return v4l2_subdev_call(sd, video, g_frame_interval, arg); | ||
251 | |||
252 | case VIDIOC_SUBDEV_S_FRAME_INTERVAL: | ||
253 | return v4l2_subdev_call(sd, video, s_frame_interval, arg); | ||
254 | |||
255 | case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: { | ||
256 | struct v4l2_subdev_frame_interval_enum *fie = arg; | ||
257 | |||
258 | if (fie->pad >= sd->entity.num_pads) | ||
259 | return -EINVAL; | ||
260 | |||
261 | return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh, | ||
262 | fie); | ||
263 | } | ||
264 | #endif | ||
265 | default: | ||
266 | return v4l2_subdev_call(sd, core, ioctl, cmd, arg); | ||
267 | } | ||
268 | |||
269 | return 0; | ||
270 | } | ||
271 | |||
272 | static long subdev_ioctl(struct file *file, unsigned int cmd, | ||
273 | unsigned long arg) | ||
274 | { | ||
275 | return video_usercopy(file, cmd, arg, subdev_do_ioctl); | ||
276 | } | ||
277 | |||
278 | static unsigned int subdev_poll(struct file *file, poll_table *wait) | ||
279 | { | ||
280 | struct video_device *vdev = video_devdata(file); | ||
281 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | ||
282 | struct v4l2_fh *fh = file->private_data; | ||
283 | |||
284 | if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) | ||
285 | return POLLERR; | ||
286 | |||
287 | poll_wait(file, &fh->wait, wait); | ||
288 | |||
289 | if (v4l2_event_pending(fh)) | ||
290 | return POLLPRI; | ||
291 | |||
292 | return 0; | ||
293 | } | ||
294 | |||
295 | const struct v4l2_file_operations v4l2_subdev_fops = { | ||
296 | .owner = THIS_MODULE, | ||
297 | .open = subdev_open, | ||
298 | .unlocked_ioctl = subdev_ioctl, | ||
299 | .release = subdev_close, | ||
300 | .poll = subdev_poll, | ||
301 | }; | ||
302 | |||
303 | void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) | ||
304 | { | ||
305 | INIT_LIST_HEAD(&sd->list); | ||
306 | BUG_ON(!ops); | ||
307 | sd->ops = ops; | ||
308 | sd->v4l2_dev = NULL; | ||
309 | sd->flags = 0; | ||
310 | sd->name[0] = '\0'; | ||
311 | sd->grp_id = 0; | ||
312 | sd->dev_priv = NULL; | ||
313 | sd->host_priv = NULL; | ||
314 | #if defined(CONFIG_MEDIA_CONTROLLER) | ||
315 | sd->entity.name = sd->name; | ||
316 | sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV; | ||
317 | #endif | ||
318 | } | ||
319 | EXPORT_SYMBOL(v4l2_subdev_init); | ||