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 | ||
78 | ret = v4l2_fh_init(&subdev_fh->vfh, vdev); | |
79 | if (ret) | |
80 | goto err; | |
02adb1cc | 81 | |
7cd5a16b SV |
82 | if (sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS) { |
83 | ret = v4l2_event_init(&subdev_fh->vfh); | |
02adb1cc SA |
84 | if (ret) |
85 | goto err; | |
86 | ||
7cd5a16b | 87 | ret = v4l2_event_alloc(&subdev_fh->vfh, sd->nevents); |
02adb1cc SA |
88 | if (ret) |
89 | goto err; | |
02adb1cc | 90 | } |
7cd5a16b SV |
91 | |
92 | v4l2_fh_add(&subdev_fh->vfh); | |
93 | file->private_data = &subdev_fh->vfh; | |
61f5db54 LP |
94 | #if defined(CONFIG_MEDIA_CONTROLLER) |
95 | if (sd->v4l2_dev->mdev) { | |
96 | entity = media_entity_get(&sd->entity); | |
97 | if (!entity) { | |
98 | ret = -EBUSY; | |
99 | goto err; | |
100 | } | |
101 | } | |
102 | #endif | |
7cd5a16b | 103 | |
f0beea8f LP |
104 | if (sd->internal_ops && sd->internal_ops->open) { |
105 | ret = sd->internal_ops->open(sd, subdev_fh); | |
106 | if (ret < 0) | |
107 | goto err; | |
108 | } | |
109 | ||
2096a5dc | 110 | return 0; |
02adb1cc SA |
111 | |
112 | err: | |
f0beea8f LP |
113 | #if defined(CONFIG_MEDIA_CONTROLLER) |
114 | if (entity) | |
115 | media_entity_put(entity); | |
116 | #endif | |
7cd5a16b SV |
117 | v4l2_fh_del(&subdev_fh->vfh); |
118 | v4l2_fh_exit(&subdev_fh->vfh); | |
119 | subdev_fh_free(subdev_fh); | |
120 | kfree(subdev_fh); | |
02adb1cc SA |
121 | |
122 | return ret; | |
2096a5dc LP |
123 | } |
124 | ||
125 | static int subdev_close(struct file *file) | |
126 | { | |
61f5db54 LP |
127 | struct video_device *vdev = video_devdata(file); |
128 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | |
02adb1cc | 129 | struct v4l2_fh *vfh = file->private_data; |
7cd5a16b | 130 | struct v4l2_subdev_fh *subdev_fh = to_v4l2_subdev_fh(vfh); |
02adb1cc | 131 | |
f0beea8f LP |
132 | if (sd->internal_ops && sd->internal_ops->close) |
133 | sd->internal_ops->close(sd, subdev_fh); | |
61f5db54 LP |
134 | #if defined(CONFIG_MEDIA_CONTROLLER) |
135 | if (sd->v4l2_dev->mdev) | |
136 | media_entity_put(&sd->entity); | |
137 | #endif | |
7cd5a16b SV |
138 | v4l2_fh_del(vfh); |
139 | v4l2_fh_exit(vfh); | |
140 | subdev_fh_free(subdev_fh); | |
141 | kfree(subdev_fh); | |
142 | file->private_data = NULL; | |
02adb1cc | 143 | |
2096a5dc LP |
144 | return 0; |
145 | } | |
146 | ||
147 | static long subdev_do_ioctl(struct file *file, unsigned int cmd, void *arg) | |
148 | { | |
ea8aa434 LP |
149 | struct video_device *vdev = video_devdata(file); |
150 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | |
7cd5a16b | 151 | struct v4l2_fh *vfh = file->private_data; |
ea8aa434 | 152 | |
2096a5dc | 153 | switch (cmd) { |
ea8aa434 LP |
154 | case VIDIOC_QUERYCTRL: |
155 | return v4l2_subdev_queryctrl(sd, arg); | |
156 | ||
157 | case VIDIOC_QUERYMENU: | |
158 | return v4l2_subdev_querymenu(sd, arg); | |
159 | ||
160 | case VIDIOC_G_CTRL: | |
161 | return v4l2_subdev_g_ctrl(sd, arg); | |
162 | ||
163 | case VIDIOC_S_CTRL: | |
164 | return v4l2_subdev_s_ctrl(sd, arg); | |
165 | ||
166 | case VIDIOC_G_EXT_CTRLS: | |
167 | return v4l2_subdev_g_ext_ctrls(sd, arg); | |
168 | ||
169 | case VIDIOC_S_EXT_CTRLS: | |
170 | return v4l2_subdev_s_ext_ctrls(sd, arg); | |
171 | ||
172 | case VIDIOC_TRY_EXT_CTRLS: | |
173 | return v4l2_subdev_try_ext_ctrls(sd, arg); | |
174 | ||
02adb1cc SA |
175 | case VIDIOC_DQEVENT: |
176 | if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) | |
177 | return -ENOIOCTLCMD; | |
178 | ||
7cd5a16b | 179 | return v4l2_event_dequeue(vfh, arg, file->f_flags & O_NONBLOCK); |
02adb1cc SA |
180 | |
181 | case VIDIOC_SUBSCRIBE_EVENT: | |
7cd5a16b | 182 | return v4l2_subdev_call(sd, core, subscribe_event, vfh, arg); |
02adb1cc SA |
183 | |
184 | case VIDIOC_UNSUBSCRIBE_EVENT: | |
7cd5a16b | 185 | return v4l2_subdev_call(sd, core, unsubscribe_event, vfh, arg); |
02adb1cc | 186 | |
2096a5dc LP |
187 | default: |
188 | return -ENOIOCTLCMD; | |
189 | } | |
190 | ||
191 | return 0; | |
192 | } | |
193 | ||
194 | static long subdev_ioctl(struct file *file, unsigned int cmd, | |
195 | unsigned long arg) | |
196 | { | |
197 | return video_usercopy(file, cmd, arg, subdev_do_ioctl); | |
198 | } | |
199 | ||
02adb1cc SA |
200 | static unsigned int subdev_poll(struct file *file, poll_table *wait) |
201 | { | |
202 | struct video_device *vdev = video_devdata(file); | |
203 | struct v4l2_subdev *sd = vdev_to_v4l2_subdev(vdev); | |
204 | struct v4l2_fh *fh = file->private_data; | |
205 | ||
206 | if (!(sd->flags & V4L2_SUBDEV_FL_HAS_EVENTS)) | |
207 | return POLLERR; | |
208 | ||
209 | poll_wait(file, &fh->events->wait, wait); | |
210 | ||
211 | if (v4l2_event_pending(fh)) | |
212 | return POLLPRI; | |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
2096a5dc LP |
217 | const struct v4l2_file_operations v4l2_subdev_fops = { |
218 | .owner = THIS_MODULE, | |
219 | .open = subdev_open, | |
220 | .unlocked_ioctl = subdev_ioctl, | |
221 | .release = subdev_close, | |
02adb1cc | 222 | .poll = subdev_poll, |
2096a5dc | 223 | }; |
3dd5ee08 LP |
224 | |
225 | void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) | |
226 | { | |
227 | INIT_LIST_HEAD(&sd->list); | |
228 | BUG_ON(!ops); | |
229 | sd->ops = ops; | |
230 | sd->v4l2_dev = NULL; | |
231 | sd->flags = 0; | |
232 | sd->name[0] = '\0'; | |
233 | sd->grp_id = 0; | |
234 | sd->dev_priv = NULL; | |
235 | sd->host_priv = NULL; | |
61f5db54 LP |
236 | #if defined(CONFIG_MEDIA_CONTROLLER) |
237 | sd->entity.name = sd->name; | |
238 | sd->entity.type = MEDIA_ENT_T_V4L2_SUBDEV; | |
239 | #endif | |
3dd5ee08 LP |
240 | } |
241 | EXPORT_SYMBOL(v4l2_subdev_init); |