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Commit | Line | Data |
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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 | 26 | #include <linux/videodev2.h> |
35a24636 | 27 | #include <linux/export.h> |
2096a5dc | 28 | |
ea8aa434 | 29 | #include <media/v4l2-ctrls.h> |
2096a5dc LP |
30 | #include <media/v4l2-device.h> |
31 | #include <media/v4l2-ioctl.h> | |
02adb1cc SA |
32 | #include <media/v4l2-fh.h> |
33 | #include <media/v4l2-event.h> | |
2096a5dc | 34 | |
7cd5a16b SV |
35 | static int subdev_fh_init(struct v4l2_subdev_fh *fh, struct v4l2_subdev *sd) |
36 | { | |
37 | #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) | |
38 | /* Allocate try format and crop in the same memory block */ | |
39 | fh->try_fmt = kzalloc((sizeof(*fh->try_fmt) + sizeof(*fh->try_crop)) | |
40 | * sd->entity.num_pads, GFP_KERNEL); | |
41 | if (fh->try_fmt == NULL) | |
42 | return -ENOMEM; | |
43 | ||
44 | fh->try_crop = (struct v4l2_rect *) | |
45 | (fh->try_fmt + sd->entity.num_pads); | |
46 | #endif | |
47 | return 0; | |
48 | } | |
49 | ||
50 | static void subdev_fh_free(struct v4l2_subdev_fh *fh) | |
51 | { | |
52 | #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) | |
53 | kfree(fh->try_fmt); | |
54 | fh->try_fmt = NULL; | |
55 | fh->try_crop = NULL; | |
56 | #endif | |
57 | } | |
58 | ||
2096a5dc LP |
59 | static int subdev_open(struct file *file) |
60 | { | |
02adb1cc SA |
61 | struct video_device *vdev = video_devdata(file); |
62 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | |
7cd5a16b | 63 | struct v4l2_subdev_fh *subdev_fh; |
61f5db54 | 64 | #if defined(CONFIG_MEDIA_CONTROLLER) |
f0beea8f | 65 | struct media_entity *entity = NULL; |
61f5db54 | 66 | #endif |
02adb1cc SA |
67 | int ret; |
68 | ||
7cd5a16b SV |
69 | subdev_fh = kzalloc(sizeof(*subdev_fh), GFP_KERNEL); |
70 | if (subdev_fh == NULL) | |
71 | return -ENOMEM; | |
02adb1cc | 72 | |
7cd5a16b SV |
73 | ret = subdev_fh_init(subdev_fh, sd); |
74 | if (ret) { | |
75 | kfree(subdev_fh); | |
76 | return ret; | |
77 | } | |
78 | ||
523f46d6 | 79 | v4l2_fh_init(&subdev_fh->vfh, vdev); |
7cd5a16b SV |
80 | v4l2_fh_add(&subdev_fh->vfh); |
81 | file->private_data = &subdev_fh->vfh; | |
61f5db54 LP |
82 | #if defined(CONFIG_MEDIA_CONTROLLER) |
83 | if (sd->v4l2_dev->mdev) { | |
84 | entity = media_entity_get(&sd->entity); | |
85 | if (!entity) { | |
86 | ret = -EBUSY; | |
87 | goto err; | |
88 | } | |
89 | } | |
90 | #endif | |
7cd5a16b | 91 | |
f0beea8f LP |
92 | if (sd->internal_ops && sd->internal_ops->open) { |
93 | ret = sd->internal_ops->open(sd, subdev_fh); | |
94 | if (ret < 0) | |
95 | goto err; | |
96 | } | |
97 | ||
2096a5dc | 98 | return 0; |
02adb1cc SA |
99 | |
100 | err: | |
f0beea8f LP |
101 | #if defined(CONFIG_MEDIA_CONTROLLER) |
102 | if (entity) | |
103 | media_entity_put(entity); | |
104 | #endif | |
7cd5a16b SV |
105 | v4l2_fh_del(&subdev_fh->vfh); |
106 | v4l2_fh_exit(&subdev_fh->vfh); | |
107 | subdev_fh_free(subdev_fh); | |
108 | kfree(subdev_fh); | |
02adb1cc SA |
109 | |
110 | return ret; | |
2096a5dc LP |
111 | } |
112 | ||
113 | static int subdev_close(struct file *file) | |
114 | { | |
61f5db54 LP |
115 | struct video_device *vdev = video_devdata(file); |
116 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | |
02adb1cc | 117 | struct v4l2_fh *vfh = file->private_data; |
7cd5a16b | 118 | struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); |
02adb1cc | 119 | |
f0beea8f LP |
120 | if (sd->internal_ops && sd->internal_ops->close) |
121 | sd->internal_ops->close(sd, subdev_fh); | |
61f5db54 LP |
122 | #if defined(CONFIG_MEDIA_CONTROLLER) |
123 | if (sd->v4l2_dev->mdev) | |
124 | media_entity_put(&sd->entity); | |
125 | #endif | |
7cd5a16b SV |
126 | v4l2_fh_del(vfh); |
127 | v4l2_fh_exit(vfh); | |
128 | subdev_fh_free(subdev_fh); | |
129 | kfree(subdev_fh); | |
130 | file->private_data = NULL; | |
02adb1cc | 131 | |
2096a5dc LP |
132 | return 0; |
133 | } | |
134 | ||
135 | static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) | |
136 | { | |
ea8aa434 LP |
137 | struct video_device *vdev = video_devdata(file); |
138 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | |
7cd5a16b | 139 | struct v4l2_fh *vfh = file->private_data; |
333c8b97 LP |
140 | #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) |
141 | struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); | |
142 | #endif | |
ea8aa434 | 143 | |
2096a5dc | 144 | switch (cmd) { |
ea8aa434 | 145 | case VIDIOC_QUERYCTRL: |
18d171ba | 146 | return v4l2_queryctrl(vfh->ctrl_handler, arg); |
ea8aa434 LP |
147 | |
148 | case VIDIOC_QUERYMENU: | |
18d171ba | 149 | return v4l2_querymenu(vfh->ctrl_handler, arg); |
ea8aa434 LP |
150 | |
151 | case VIDIOC_G_CTRL: | |
18d171ba | 152 | return v4l2_g_ctrl(vfh->ctrl_handler, arg); |
ea8aa434 LP |
153 | |
154 | case VIDIOC_S_CTRL: | |
ab892bac | 155 | return v4l2_s_ctrl(vfh, vfh->ctrl_handler, arg); |
ea8aa434 LP |
156 | |
157 | case VIDIOC_G_EXT_CTRLS: | |
18d171ba | 158 | return v4l2_g_ext_ctrls(vfh->ctrl_handler, arg); |
ea8aa434 LP |
159 | |
160 | case VIDIOC_S_EXT_CTRLS: | |
ab892bac | 161 | return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, arg); |
ea8aa434 LP |
162 | |
163 | case VIDIOC_TRY_EXT_CTRLS: | |
18d171ba | 164 | return v4l2_try_ext_ctrls(vfh->ctrl_handler, arg); |
ea8aa434 | 165 | |
02adb1cc SA |
166 | case VIDIOC_DQEVENT: |
167 | if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) | |
168 | return -ENOIOCTLCMD; | |
169 | ||
7cd5a16b | 170 | return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK); |
02adb1cc SA |
171 | |
172 | case VIDIOC_SUBSCRIBE_EVENT: | |
7cd5a16b | 173 | return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg); |
02adb1cc SA |
174 | |
175 | case VIDIOC_UNSUBSCRIBE_EVENT: | |
7cd5a16b | 176 | return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg); |
69967a71 MH |
177 | |
178 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
179 | case VIDIOC_DBG_G_REGISTER: | |
180 | { | |
181 | struct v4l2_dbg_register *p = arg; | |
182 | ||
183 | if (!capable(CAP_SYS_ADMIN)) | |
184 | return -EPERM; | |
185 | return v4l2_subdev_call(sd, core, g_register, p); | |
186 | } | |
187 | case VIDIOC_DBG_S_REGISTER: | |
188 | { | |
189 | struct v4l2_dbg_register *p = arg; | |
190 | ||
191 | if (!capable(CAP_SYS_ADMIN)) | |
192 | return -EPERM; | |
193 | return v4l2_subdev_call(sd, core, s_register, p); | |
194 | } | |
195 | #endif | |
bcd158de SN |
196 | |
197 | case VIDIOC_LOG_STATUS: | |
198 | return v4l2_subdev_call(sd, core, log_status); | |
199 | ||
333c8b97 LP |
200 | #if defined(CONFIG_VIDEO_V4L2_SUBDEV_API) |
201 | case VIDIOC_SUBDEV_G_FMT: { | |
202 | struct v4l2_subdev_format *format = arg; | |
203 | ||
204 | if (format->which != V4L2_SUBDEV_FORMAT_TRY && | |
205 | format->which != V4L2_SUBDEV_FORMAT_ACTIVE) | |
206 | return -EINVAL; | |
207 | ||
208 | if (format->pad >= sd->entity.num_pads) | |
209 | return -EINVAL; | |
210 | ||
211 | return v4l2_subdev_call(sd, pad, get_fmt, subdev_fh, format); | |
212 | } | |
213 | ||
214 | case VIDIOC_SUBDEV_S_FMT: { | |
215 | struct v4l2_subdev_format *format = arg; | |
216 | ||
217 | if (format->which != V4L2_SUBDEV_FORMAT_TRY && | |
218 | format->which != V4L2_SUBDEV_FORMAT_ACTIVE) | |
219 | return -EINVAL; | |
220 | ||
221 | if (format->pad >= sd->entity.num_pads) | |
222 | return -EINVAL; | |
02adb1cc | 223 | |
333c8b97 LP |
224 | return v4l2_subdev_call(sd, pad, set_fmt, subdev_fh, format); |
225 | } | |
226 | ||
f6a5cb1b AK |
227 | case VIDIOC_SUBDEV_G_CROP: { |
228 | struct v4l2_subdev_crop *crop = arg; | |
229 | ||
230 | if (crop->which != V4L2_SUBDEV_FORMAT_TRY && | |
231 | crop->which != V4L2_SUBDEV_FORMAT_ACTIVE) | |
232 | return -EINVAL; | |
233 | ||
234 | if (crop->pad >= sd->entity.num_pads) | |
235 | return -EINVAL; | |
236 | ||
237 | return v4l2_subdev_call(sd, pad, get_crop, subdev_fh, crop); | |
238 | } | |
239 | ||
240 | case VIDIOC_SUBDEV_S_CROP: { | |
241 | struct v4l2_subdev_crop *crop = arg; | |
242 | ||
243 | if (crop->which != V4L2_SUBDEV_FORMAT_TRY && | |
244 | crop->which != V4L2_SUBDEV_FORMAT_ACTIVE) | |
245 | return -EINVAL; | |
246 | ||
247 | if (crop->pad >= sd->entity.num_pads) | |
248 | return -EINVAL; | |
249 | ||
250 | return v4l2_subdev_call(sd, pad, set_crop, subdev_fh, crop); | |
251 | } | |
252 | ||
333c8b97 LP |
253 | case VIDIOC_SUBDEV_ENUM_MBUS_CODE: { |
254 | struct v4l2_subdev_mbus_code_enum *code = arg; | |
255 | ||
256 | if (code->pad >= sd->entity.num_pads) | |
257 | return -EINVAL; | |
258 | ||
259 | return v4l2_subdev_call(sd, pad, enum_mbus_code, subdev_fh, | |
260 | code); | |
261 | } | |
262 | ||
263 | case VIDIOC_SUBDEV_ENUM_FRAME_SIZE: { | |
264 | struct v4l2_subdev_frame_size_enum *fse = arg; | |
265 | ||
266 | if (fse->pad >= sd->entity.num_pads) | |
267 | return -EINVAL; | |
268 | ||
269 | return v4l2_subdev_call(sd, pad, enum_frame_size, subdev_fh, | |
270 | fse); | |
271 | } | |
35c3017a LP |
272 | |
273 | case VIDIOC_SUBDEV_G_FRAME_INTERVAL: | |
274 | return v4l2_subdev_call(sd, video, g_frame_interval, arg); | |
275 | ||
276 | case VIDIOC_SUBDEV_S_FRAME_INTERVAL: | |
277 | return v4l2_subdev_call(sd, video, s_frame_interval, arg); | |
278 | ||
279 | case VIDIOC_SUBDEV_ENUM_FRAME_INTERVAL: { | |
280 | struct v4l2_subdev_frame_interval_enum *fie = arg; | |
281 | ||
282 | if (fie->pad >= sd->entity.num_pads) | |
283 | return -EINVAL; | |
284 | ||
285 | return v4l2_subdev_call(sd, pad, enum_frame_interval, subdev_fh, | |
286 | fie); | |
287 | } | |
333c8b97 | 288 | #endif |
2096a5dc | 289 | default: |
c30b46e5 | 290 | return v4l2_subdev_call(sd, core, ioctl, cmd, arg); |
2096a5dc LP |
291 | } |
292 | ||
293 | return 0; | |
294 | } | |
295 | ||
296 | static long subdev_ioctl(struct file *file, unsigned int cmd, | |
297 | unsigned long arg) | |
298 | { | |
299 | return video_usercopy(file, cmd, arg, subdev_do_ioctl); | |
300 | } | |
301 | ||
02adb1cc SA |
302 | static unsigned int subdev_poll(struct file *file, poll_table *wait) |
303 | { | |
304 | struct video_device *vdev = video_devdata(file); | |
305 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | |
306 | struct v4l2_fh *fh = file->private_data; | |
307 | ||
308 | if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) | |
309 | return POLLERR; | |
310 | ||
523f46d6 | 311 | poll_wait(file, &fh->wait, wait); |
02adb1cc SA |
312 | |
313 | if (v4l2_event_pending(fh)) | |
314 | return POLLPRI; | |
315 | ||
316 | return 0; | |
317 | } | |
318 | ||
2096a5dc LP |
319 | const struct v4l2_file_operations v4l2_subdev_fops = { |
320 | .owner = THIS_MODULE, | |
321 | .open = subdev_open, | |
322 | .unlocked_ioctl = subdev_ioctl, | |
323 | .release = subdev_close, | |
02adb1cc | 324 | .poll = subdev_poll, |
2096a5dc | 325 | }; |
3dd5ee08 LP |
326 | |
327 | void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) | |
328 | { | |
329 | INIT_LIST_HEAD(&sd->list); | |
330 | BUG_ON(!ops); | |
331 | sd->ops = ops; | |
332 | sd->v4l2_dev = NULL; | |
333 | sd->flags = 0; | |
334 | sd->name[0] = '\0'; | |
335 | sd->grp_id = 0; | |
336 | sd->dev_priv = NULL; | |
337 | sd->host_priv = NULL; | |
61f5db54 LP |
338 | #if defined(CONFIG_MEDIA_CONTROLLER) |
339 | sd->entity.name = sd->name; | |
340 | sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV; | |
341 | #endif | |
3dd5ee08 LP |
342 | } |
343 | EXPORT_SYMBOL(v4l2_subdev_init); |