Commit | Line | Data |
---|---|---|
2096a5dc | 1 | /* |
3dd5ee08 | 2 | * V4L2 sub-device |
2096a5dc | 3 | * |
3dd5ee08 | 4 | * Copyright (C) 2010 Nokia Corporation |
2096a5dc | 5 | * |
3dd5ee08 LP |
6 | * Contact: Laurent Pinchart <laurent.pinchart@ideasonboard.com> |
7 | * Sakari Ailus <sakari.ailus@iki.fi> | |
2096a5dc | 8 | * |
3dd5ee08 LP |
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. | |
2096a5dc | 12 | * |
3dd5ee08 LP |
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. | |
2096a5dc | 17 | * |
3dd5ee08 LP |
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 | |
2096a5dc LP |
21 | */ |
22 | ||
2096a5dc | 23 | #include <linux/ioctl.h> |
02adb1cc SA |
24 | #include <linux/slab.h> |
25 | #include <linux/types.h> | |
2096a5dc LP |
26 | #include <linux/videodev2.h> |
27 | ||
ea8aa434 | 28 | #include <media/v4l2-ctrls.h> |
2096a5dc LP |
29 | #include <media/v4l2-device.h> |
30 | #include <media/v4l2-ioctl.h> | |
02adb1cc SA |
31 | #include <media/v4l2-fh.h> |
32 | #include <media/v4l2-event.h> | |
2096a5dc | 33 | |
7cd5a16b SV |
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 | ||
2096a5dc LP |
58 | static int subdev_open(struct file *file) |
59 | { | |
02adb1cc SA |
60 | struct video_device *vdev = video_devdata(file); |
61 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | |
7cd5a16b | 62 | struct v4l2_subdev_fh *subdev_fh; |
61f5db54 | 63 | #if defined(CONFIG_MEDIA_CONTROLLER) |
f0beea8f | 64 | struct media_entity *entity = NULL; |
61f5db54 | 65 | #endif |
02adb1cc SA |
66 | int ret; |
67 | ||
7cd5a16b SV |
68 | subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL); |
69 | if (subdev_fh == NULL) | |
70 | return -ENOMEM; | |
02adb1cc | 71 | |
7cd5a16b SV |
72 | ret = subdev_fh_init(subdev_fh, sd); |
73 | if (ret) { | |
74 | kfree(subdev_fh); | |
75 | return ret; | |
76 | } | |
77 | ||
523f46d6 | 78 | v4l2_fh_init(&subdev_fh->vfh, vdev); |
02adb1cc | 79 | |
7cd5a16b | 80 | if (sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS) { |
7cd5a16b | 81 | ret = v4l2_event_alloc(&subdev_fh->vfh, sd->nevents); |
02adb1cc SA |
82 | if (ret) |
83 | goto err; | |
02adb1cc | 84 | } |
7cd5a16b SV |
85 | |
86 | v4l2_fh_add(&subdev_fh->vfh); | |
87 | file->private_data = &subdev_fh->vfh; | |
61f5db54 LP |
88 | #if defined(CONFIG_MEDIA_CONTROLLER) |
89 | if (sd->v4l2_dev->mdev) { | |
90 | entity = media_entity_get(&sd->entity); | |
91 | if (!entity) { | |
92 | ret = -EBUSY; | |
93 | goto err; | |
94 | } | |
95 | } | |
96 | #endif | |
7cd5a16b | 97 | |
f0beea8f LP |
98 | if (sd->internal_ops && sd->internal_ops->open) { |
99 | ret = sd->internal_ops->open(sd, subdev_fh); | |
100 | if (ret < 0) | |
101 | goto err; | |
102 | } | |
103 | ||
2096a5dc | 104 | return 0; |
02adb1cc SA |
105 | |
106 | err: | |
f0beea8f LP |
107 | #if defined(CONFIG_MEDIA_CONTROLLER) |
108 | if (entity) | |
109 | media_entity_put(entity); | |
110 | #endif | |
7cd5a16b SV |
111 | v4l2_fh_del(&subdev_fh->vfh); |
112 | v4l2_fh_exit(&subdev_fh->vfh); | |
113 | subdev_fh_free(subdev_fh); | |
114 | kfree(subdev_fh); | |
02adb1cc SA |
115 | |
116 | return ret; | |
2096a5dc LP |
117 | } |
118 | ||
119 | static int subdev_close(struct file *file) | |
120 | { | |
61f5db54 LP |
121 | struct video_device *vdev = video_devdata(file); |
122 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | |
02adb1cc | 123 | struct v4l2_fh *vfh = file->private_data; |
7cd5a16b | 124 | struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); |
02adb1cc | 125 | |
f0beea8f LP |
126 | if (sd->internal_ops && sd->internal_ops->close) |
127 | sd->internal_ops->close(sd, subdev_fh); | |
61f5db54 LP |
128 | #if defined(CONFIG_MEDIA_CONTROLLER) |
129 | if (sd->v4l2_dev->mdev) | |
130 | media_entity_put(&sd->entity); | |
131 | #endif | |
7cd5a16b SV |
132 | v4l2_fh_del(vfh); |
133 | v4l2_fh_exit(vfh); | |
134 | subdev_fh_free(subdev_fh); | |
135 | kfree(subdev_fh); | |
136 | file->private_data = NULL; | |
02adb1cc | 137 | |
2096a5dc LP |
138 | return 0; |
139 | } | |
140 | ||
141 | static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) | |
142 | { | |
ea8aa434 LP |
143 | struct video_device *vdev = video_devdata(file); |
144 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | |
7cd5a16b | 145 | struct v4l2_fh *vfh = file->private_data; |
333c8b97 LP |
146 | #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) |
147 | struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); | |
148 | #endif | |
ea8aa434 | 149 | |
2096a5dc | 150 | switch (cmd) { |
ea8aa434 | 151 | case VIDIOC_QUERYCTRL: |
18d171ba | 152 | return v4l2_queryctrl(vfh->ctrl_handler, arg); |
ea8aa434 LP |
153 | |
154 | case VIDIOC_QUERYMENU: | |
18d171ba | 155 | return v4l2_querymenu(vfh->ctrl_handler, arg); |
ea8aa434 LP |
156 | |
157 | case VIDIOC_G_CTRL: | |
18d171ba | 158 | return v4l2_g_ctrl(vfh->ctrl_handler, arg); |
ea8aa434 LP |
159 | |
160 | case VIDIOC_S_CTRL: | |
ab892bac | 161 | return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg); |
ea8aa434 LP |
162 | |
163 | case VIDIOC_G_EXT_CTRLS: | |
18d171ba | 164 | return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg); |
ea8aa434 LP |
165 | |
166 | case VIDIOC_S_EXT_CTRLS: | |
ab892bac | 167 | return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg); |
ea8aa434 LP |
168 | |
169 | case VIDIOC_TRY_EXT_CTRLS: | |
18d171ba | 170 | return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg); |
ea8aa434 | 171 | |
02adb1cc SA |
172 | case VIDIOC_DQEVENT: |
173 | if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) | |
174 | return -ENOIOCTLCMD; | |
175 | ||
7cd5a16b | 176 | return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK); |
02adb1cc SA |
177 | |
178 | case VIDIOC_SUBSCRIBE_EVENT: | |
7cd5a16b | 179 | return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg); |
02adb1cc SA |
180 | |
181 | case VIDIOC_UNSUBSCRIBE_EVENT: | |
7cd5a16b | 182 | return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg); |
333c8b97 LP |
183 | #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) |
184 | case VIDIOC_SUBDEV_G_FMT: { | |
185 | struct v4l2_subdev_format *format = arg; | |
186 | ||
187 | if (format->which != V4L2_SUBDEV_FORMAT_TRY && | |
188 | format->which != V4L2_SUBDEV_FORMAT_ACTIVE) | |
189 | return -EINVAL; | |
190 | ||
191 | if (format->pad >= sd->entity.num_pads) | |
192 | return -EINVAL; | |
193 | ||
194 | return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format); | |
195 | } | |
196 | ||
197 | case VIDIOC_SUBDEV_S_FMT: { | |
198 | struct v4l2_subdev_format *format = arg; | |
199 | ||
200 | if (format->which != V4L2_SUBDEV_FORMAT_TRY && | |
201 | format->which != V4L2_SUBDEV_FORMAT_ACTIVE) | |
202 | return -EINVAL; | |
203 | ||
204 | if (format->pad >= sd->entity.num_pads) | |
205 | return -EINVAL; | |
02adb1cc | 206 | |
333c8b97 LP |
207 | return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format); |
208 | } | |
209 | ||
f6a5cb1b AK |
210 | case VIDIOC_SUBDEV_G_CROP: { |
211 | struct v4l2_subdev_crop *crop = arg; | |
212 | ||
213 | if (crop->which != V4L2_SUBDEV_FORMAT_TRY && | |
214 | crop->which != V4L2_SUBDEV_FORMAT_ACTIVE) | |
215 | return -EINVAL; | |
216 | ||
217 | if (crop->pad >= sd->entity.num_pads) | |
218 | return -EINVAL; | |
219 | ||
220 | return v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop); | |
221 | } | |
222 | ||
223 | case VIDIOC_SUBDEV_S_CROP: { | |
224 | struct v4l2_subdev_crop *crop = arg; | |
225 | ||
226 | if (crop->which != V4L2_SUBDEV_FORMAT_TRY && | |
227 | crop->which != V4L2_SUBDEV_FORMAT_ACTIVE) | |
228 | return -EINVAL; | |
229 | ||
230 | if (crop->pad >= sd->entity.num_pads) | |
231 | return -EINVAL; | |
232 | ||
233 | return v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop); | |
234 | } | |
235 | ||
333c8b97 LP |
236 | case VIDIOC_SUBDEV_ENUM_MBUS_CODE: { |
237 | struct v4l2_subdev_mbus_code_enum *code = arg; | |
238 | ||
239 | if (code->pad >= sd->entity.num_pads) | |
240 | return -EINVAL; | |
241 | ||
242 | return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh, | |
243 | code); | |
244 | } | |
245 | ||
246 | case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: { | |
247 | struct v4l2_subdev_frame_size_enum *fse = arg; | |
248 | ||
249 | if (fse->pad >= sd->entity.num_pads) | |
250 | return -EINVAL; | |
251 | ||
252 | return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh, | |
253 | fse); | |
254 | } | |
35c3017a LP |
255 | |
256 | case VIDIOC_SUBDEV_G_FRAME_INTERVAL: | |
257 | return v4l2_subdev_call(sd, video, g_frame_interval, arg); | |
258 | ||
259 | case VIDIOC_SUBDEV_S_FRAME_INTERVAL: | |
260 | return v4l2_subdev_call(sd, video, s_frame_interval, arg); | |
261 | ||
262 | case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: { | |
263 | struct v4l2_subdev_frame_interval_enum *fie = arg; | |
264 | ||
265 | if (fie->pad >= sd->entity.num_pads) | |
266 | return -EINVAL; | |
267 | ||
268 | return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh, | |
269 | fie); | |
270 | } | |
333c8b97 | 271 | #endif |
2096a5dc | 272 | default: |
c30b46e5 | 273 | return v4l2_subdev_call(sd, core, ioctl, cmd, arg); |
2096a5dc LP |
274 | } |
275 | ||
276 | return 0; | |
277 | } | |
278 | ||
279 | static long subdev_ioctl(struct file *file, unsigned int cmd, | |
280 | unsigned long arg) | |
281 | { | |
282 | return video_usercopy(file, cmd, arg, subdev_do_ioctl); | |
283 | } | |
284 | ||
02adb1cc SA |
285 | static unsigned int subdev_poll(struct file *file, poll_table *wait) |
286 | { | |
287 | struct video_device *vdev = video_devdata(file); | |
288 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | |
289 | struct v4l2_fh *fh = file->private_data; | |
290 | ||
291 | if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) | |
292 | return POLLERR; | |
293 | ||
523f46d6 | 294 | poll_wait(file, &fh->wait, wait); |
02adb1cc SA |
295 | |
296 | if (v4l2_event_pending(fh)) | |
297 | return POLLPRI; | |
298 | ||
299 | return 0; | |
300 | } | |
301 | ||
2096a5dc LP |
302 | const struct v4l2_file_operations v4l2_subdev_fops = { |
303 | .owner = THIS_MODULE, | |
304 | .open = subdev_open, | |
305 | .unlocked_ioctl = subdev_ioctl, | |
306 | .release = subdev_close, | |
02adb1cc | 307 | .poll = subdev_poll, |
2096a5dc | 308 | }; |
3dd5ee08 LP |
309 | |
310 | void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) | |
311 | { | |
312 | INIT_LIST_HEAD(&sd->list); | |
313 | BUG_ON(!ops); | |
314 | sd->ops = ops; | |
315 | sd->v4l2_dev = NULL; | |
316 | sd->flags = 0; | |
317 | sd->name[0] = '\0'; | |
318 | sd->grp_id = 0; | |
319 | sd->dev_priv = NULL; | |
320 | sd->host_priv = NULL; | |
61f5db54 LP |
321 | #if defined(CONFIG_MEDIA_CONTROLLER) |
322 | sd->entity.name = sd->name; | |
323 | sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV; | |
324 | #endif | |
3dd5ee08 LP |
325 | } |
326 | EXPORT_SYMBOL(v4l2_subdev_init); |