Commit | Line | Data |
---|---|---|
176fb0d1 LP |
1 | /* |
2 | * Media device | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
5 | * | |
6 | * Contacts: 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 | ||
b2cd2744 MCC |
23 | /* We need to access legacy defines from linux/media.h */ |
24 | #define __NEED_MEDIA_LEGACY_API | |
25 | ||
b0a1f2a8 SA |
26 | #include <linux/compat.h> |
27 | #include <linux/export.h> | |
665faa97 | 28 | #include <linux/idr.h> |
176fb0d1 | 29 | #include <linux/ioctl.h> |
140d8816 | 30 | #include <linux/media.h> |
57208e5e | 31 | #include <linux/slab.h> |
497e80cd | 32 | #include <linux/types.h> |
176fb0d1 LP |
33 | |
34 | #include <media/media-device.h> | |
35 | #include <media/media-devnode.h> | |
53e269c1 | 36 | #include <media/media-entity.h> |
176fb0d1 | 37 | |
e576d60b SK |
38 | #ifdef CONFIG_MEDIA_CONTROLLER |
39 | ||
140d8816 LP |
40 | /* ----------------------------------------------------------------------------- |
41 | * Userspace API | |
42 | */ | |
43 | ||
44 | static int media_device_open(struct file *filp) | |
45 | { | |
46 | return 0; | |
47 | } | |
48 | ||
49 | static int media_device_close(struct file *filp) | |
50 | { | |
51 | return 0; | |
52 | } | |
53 | ||
54 | static int media_device_get_info(struct media_device *dev, | |
55 | struct media_device_info __user *__info) | |
56 | { | |
57 | struct media_device_info info; | |
58 | ||
59 | memset(&info, 0, sizeof(info)); | |
60 | ||
61 | strlcpy(info.driver, dev->dev->driver->name, sizeof(info.driver)); | |
62 | strlcpy(info.model, dev->model, sizeof(info.model)); | |
63 | strlcpy(info.serial, dev->serial, sizeof(info.serial)); | |
64 | strlcpy(info.bus_info, dev->bus_info, sizeof(info.bus_info)); | |
65 | ||
66 | info.media_version = MEDIA_API_VERSION; | |
67 | info.hw_revision = dev->hw_revision; | |
68 | info.driver_version = dev->driver_version; | |
69 | ||
b17d3945 NT |
70 | if (copy_to_user(__info, &info, sizeof(*__info))) |
71 | return -EFAULT; | |
72 | return 0; | |
140d8816 LP |
73 | } |
74 | ||
1651333b LP |
75 | static struct media_entity *find_entity(struct media_device *mdev, u32 id) |
76 | { | |
77 | struct media_entity *entity; | |
78 | int next = id & MEDIA_ENT_ID_FLAG_NEXT; | |
79 | ||
80 | id &= ~MEDIA_ENT_ID_FLAG_NEXT; | |
81 | ||
82 | spin_lock(&mdev->lock); | |
83 | ||
84 | media_device_for_each_entity(entity, mdev) { | |
fa762394 MCC |
85 | if (((media_entity_id(entity) == id) && !next) || |
86 | ((media_entity_id(entity) > id) && next)) { | |
1651333b LP |
87 | spin_unlock(&mdev->lock); |
88 | return entity; | |
89 | } | |
90 | } | |
91 | ||
92 | spin_unlock(&mdev->lock); | |
93 | ||
94 | return NULL; | |
95 | } | |
96 | ||
97 | static long media_device_enum_entities(struct media_device *mdev, | |
98 | struct media_entity_desc __user *uent) | |
99 | { | |
100 | struct media_entity *ent; | |
101 | struct media_entity_desc u_ent; | |
102 | ||
e6a62346 | 103 | memset(&u_ent, 0, sizeof(u_ent)); |
1651333b LP |
104 | if (copy_from_user(&u_ent.id, &uent->id, sizeof(u_ent.id))) |
105 | return -EFAULT; | |
106 | ||
107 | ent = find_entity(mdev, u_ent.id); | |
108 | ||
109 | if (ent == NULL) | |
110 | return -EINVAL; | |
111 | ||
fa762394 | 112 | u_ent.id = media_entity_id(ent); |
de8eae36 LP |
113 | if (ent->name) |
114 | strlcpy(u_ent.name, ent->name, sizeof(u_ent.name)); | |
0e576b76 | 115 | u_ent.type = ent->function; |
8ed8c88c | 116 | u_ent.revision = 0; /* Unused */ |
1651333b | 117 | u_ent.flags = ent->flags; |
8ed8c88c | 118 | u_ent.group_id = 0; /* Unused */ |
1651333b LP |
119 | u_ent.pads = ent->num_pads; |
120 | u_ent.links = ent->num_links - ent->num_backlinks; | |
b2cd2744 MCC |
121 | |
122 | /* | |
123 | * Workaround for a bug at media-ctl <= v1.10 that makes it to | |
124 | * do the wrong thing if the entity function doesn't belong to | |
125 | * either MEDIA_ENT_F_OLD_BASE or MEDIA_ENT_F_OLD_SUBDEV_BASE | |
126 | * Ranges. | |
127 | * | |
128 | * Non-subdevices are expected to be at the MEDIA_ENT_F_OLD_BASE, | |
129 | * or, otherwise, will be silently ignored by media-ctl when | |
130 | * printing the graphviz diagram. So, map them into the devnode | |
131 | * old range. | |
132 | */ | |
133 | if (ent->function < MEDIA_ENT_F_OLD_BASE || | |
134 | ent->function > MEDIA_ENT_T_DEVNODE_UNKNOWN) { | |
135 | if (is_media_entity_v4l2_subdev(ent)) | |
136 | u_ent.type = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN; | |
137 | else if (ent->function != MEDIA_ENT_F_IO_V4L) | |
138 | u_ent.type = MEDIA_ENT_T_DEVNODE_UNKNOWN; | |
139 | } | |
140 | ||
fa5034c6 | 141 | memcpy(&u_ent.raw, &ent->info, sizeof(ent->info)); |
1651333b LP |
142 | if (copy_to_user(uent, &u_ent, sizeof(u_ent))) |
143 | return -EFAULT; | |
144 | return 0; | |
145 | } | |
146 | ||
147 | static void media_device_kpad_to_upad(const struct media_pad *kpad, | |
148 | struct media_pad_desc *upad) | |
149 | { | |
fa762394 | 150 | upad->entity = media_entity_id(kpad->entity); |
1651333b LP |
151 | upad->index = kpad->index; |
152 | upad->flags = kpad->flags; | |
153 | } | |
154 | ||
b0a1f2a8 SA |
155 | static long __media_device_enum_links(struct media_device *mdev, |
156 | struct media_links_enum *links) | |
1651333b LP |
157 | { |
158 | struct media_entity *entity; | |
1651333b | 159 | |
b0a1f2a8 | 160 | entity = find_entity(mdev, links->entity); |
1651333b LP |
161 | if (entity == NULL) |
162 | return -EINVAL; | |
163 | ||
b0a1f2a8 | 164 | if (links->pads) { |
1651333b LP |
165 | unsigned int p; |
166 | ||
167 | for (p = 0; p < entity->num_pads; p++) { | |
168 | struct media_pad_desc pad; | |
c88e739b DC |
169 | |
170 | memset(&pad, 0, sizeof(pad)); | |
1651333b | 171 | media_device_kpad_to_upad(&entity->pads[p], &pad); |
b0a1f2a8 | 172 | if (copy_to_user(&links->pads[p], &pad, sizeof(pad))) |
1651333b LP |
173 | return -EFAULT; |
174 | } | |
175 | } | |
176 | ||
b0a1f2a8 | 177 | if (links->links) { |
b83e2508 MCC |
178 | struct media_link *link; |
179 | struct media_link_desc __user *ulink_desc = links->links; | |
1651333b | 180 | |
b83e2508 MCC |
181 | list_for_each_entry(link, &entity->links, list) { |
182 | struct media_link_desc klink_desc; | |
1651333b LP |
183 | |
184 | /* Ignore backlinks. */ | |
b83e2508 | 185 | if (link->source->entity != entity) |
1651333b | 186 | continue; |
b83e2508 MCC |
187 | memset(&klink_desc, 0, sizeof(klink_desc)); |
188 | media_device_kpad_to_upad(link->source, | |
189 | &klink_desc.source); | |
190 | media_device_kpad_to_upad(link->sink, | |
191 | &klink_desc.sink); | |
192 | klink_desc.flags = link->flags; | |
193 | if (copy_to_user(ulink_desc, &klink_desc, | |
194 | sizeof(*ulink_desc))) | |
1651333b | 195 | return -EFAULT; |
b83e2508 | 196 | ulink_desc++; |
1651333b LP |
197 | } |
198 | } | |
b0a1f2a8 SA |
199 | |
200 | return 0; | |
201 | } | |
202 | ||
203 | static long media_device_enum_links(struct media_device *mdev, | |
204 | struct media_links_enum __user *ulinks) | |
205 | { | |
206 | struct media_links_enum links; | |
207 | int rval; | |
208 | ||
209 | if (copy_from_user(&links, ulinks, sizeof(links))) | |
210 | return -EFAULT; | |
211 | ||
212 | rval = __media_device_enum_links(mdev, &links); | |
213 | if (rval < 0) | |
214 | return rval; | |
215 | ||
1651333b LP |
216 | if (copy_to_user(ulinks, &links, sizeof(*ulinks))) |
217 | return -EFAULT; | |
b0a1f2a8 | 218 | |
1651333b LP |
219 | return 0; |
220 | } | |
221 | ||
97548ed4 LP |
222 | static long media_device_setup_link(struct media_device *mdev, |
223 | struct media_link_desc __user *_ulink) | |
224 | { | |
225 | struct media_link *link = NULL; | |
226 | struct media_link_desc ulink; | |
227 | struct media_entity *source; | |
228 | struct media_entity *sink; | |
229 | int ret; | |
230 | ||
231 | if (copy_from_user(&ulink, _ulink, sizeof(ulink))) | |
232 | return -EFAULT; | |
233 | ||
234 | /* Find the source and sink entities and link. | |
235 | */ | |
236 | source = find_entity(mdev, ulink.source.entity); | |
237 | sink = find_entity(mdev, ulink.sink.entity); | |
238 | ||
239 | if (source == NULL || sink == NULL) | |
240 | return -EINVAL; | |
241 | ||
242 | if (ulink.source.index >= source->num_pads || | |
243 | ulink.sink.index >= sink->num_pads) | |
244 | return -EINVAL; | |
245 | ||
246 | link = media_entity_find_link(&source->pads[ulink.source.index], | |
247 | &sink->pads[ulink.sink.index]); | |
248 | if (link == NULL) | |
249 | return -EINVAL; | |
250 | ||
251 | /* Setup the link on both entities. */ | |
252 | ret = __media_entity_setup_link(link, ulink.flags); | |
253 | ||
254 | if (copy_to_user(_ulink, &ulink, sizeof(ulink))) | |
255 | return -EFAULT; | |
256 | ||
257 | return ret; | |
258 | } | |
259 | ||
be0270ec | 260 | #if 0 /* Let's postpone it to Kernel 4.6 */ |
8309f47c MCC |
261 | static long __media_device_get_topology(struct media_device *mdev, |
262 | struct media_v2_topology *topo) | |
263 | { | |
264 | struct media_entity *entity; | |
265 | struct media_interface *intf; | |
266 | struct media_pad *pad; | |
267 | struct media_link *link; | |
b3b7a9f1 MCC |
268 | struct media_v2_entity kentity, *uentity; |
269 | struct media_v2_interface kintf, *uintf; | |
270 | struct media_v2_pad kpad, *upad; | |
271 | struct media_v2_link klink, *ulink; | |
9033b1a4 MCC |
272 | unsigned int i; |
273 | int ret = 0; | |
8309f47c MCC |
274 | |
275 | topo->topology_version = mdev->topology_version; | |
276 | ||
277 | /* Get entities and number of entities */ | |
278 | i = 0; | |
b3b7a9f1 | 279 | uentity = media_get_uptr(topo->ptr_entities); |
8309f47c MCC |
280 | media_device_for_each_entity(entity, mdev) { |
281 | i++; | |
b3b7a9f1 | 282 | if (ret || !uentity) |
8309f47c MCC |
283 | continue; |
284 | ||
285 | if (i > topo->num_entities) { | |
286 | ret = -ENOSPC; | |
287 | continue; | |
288 | } | |
289 | ||
290 | /* Copy fields to userspace struct if not error */ | |
b3b7a9f1 MCC |
291 | memset(&kentity, 0, sizeof(kentity)); |
292 | kentity.id = entity->graph_obj.id; | |
293 | kentity.function = entity->function; | |
294 | strncpy(kentity.name, entity->name, | |
295 | sizeof(kentity.name)); | |
8309f47c | 296 | |
b3b7a9f1 | 297 | if (copy_to_user(uentity, &kentity, sizeof(kentity))) |
8309f47c | 298 | ret = -EFAULT; |
b3b7a9f1 | 299 | uentity++; |
8309f47c MCC |
300 | } |
301 | topo->num_entities = i; | |
302 | ||
303 | /* Get interfaces and number of interfaces */ | |
304 | i = 0; | |
b3b7a9f1 | 305 | uintf = media_get_uptr(topo->ptr_interfaces); |
8309f47c MCC |
306 | media_device_for_each_intf(intf, mdev) { |
307 | i++; | |
b3b7a9f1 | 308 | if (ret || !uintf) |
8309f47c MCC |
309 | continue; |
310 | ||
311 | if (i > topo->num_interfaces) { | |
312 | ret = -ENOSPC; | |
313 | continue; | |
314 | } | |
315 | ||
b3b7a9f1 | 316 | memset(&kintf, 0, sizeof(kintf)); |
8309f47c MCC |
317 | |
318 | /* Copy intf fields to userspace struct */ | |
b3b7a9f1 MCC |
319 | kintf.id = intf->graph_obj.id; |
320 | kintf.intf_type = intf->type; | |
321 | kintf.flags = intf->flags; | |
8309f47c MCC |
322 | |
323 | if (media_type(&intf->graph_obj) == MEDIA_GRAPH_INTF_DEVNODE) { | |
324 | struct media_intf_devnode *devnode; | |
325 | ||
326 | devnode = intf_to_devnode(intf); | |
327 | ||
b3b7a9f1 MCC |
328 | kintf.devnode.major = devnode->major; |
329 | kintf.devnode.minor = devnode->minor; | |
8309f47c MCC |
330 | } |
331 | ||
b3b7a9f1 | 332 | if (copy_to_user(uintf, &kintf, sizeof(kintf))) |
8309f47c | 333 | ret = -EFAULT; |
b3b7a9f1 | 334 | uintf++; |
8309f47c MCC |
335 | } |
336 | topo->num_interfaces = i; | |
337 | ||
338 | /* Get pads and number of pads */ | |
339 | i = 0; | |
b3b7a9f1 | 340 | upad = media_get_uptr(topo->ptr_pads); |
8309f47c MCC |
341 | media_device_for_each_pad(pad, mdev) { |
342 | i++; | |
b3b7a9f1 | 343 | if (ret || !upad) |
8309f47c MCC |
344 | continue; |
345 | ||
346 | if (i > topo->num_pads) { | |
347 | ret = -ENOSPC; | |
348 | continue; | |
349 | } | |
350 | ||
b3b7a9f1 | 351 | memset(&kpad, 0, sizeof(kpad)); |
8309f47c MCC |
352 | |
353 | /* Copy pad fields to userspace struct */ | |
b3b7a9f1 MCC |
354 | kpad.id = pad->graph_obj.id; |
355 | kpad.entity_id = pad->entity->graph_obj.id; | |
356 | kpad.flags = pad->flags; | |
8309f47c | 357 | |
b3b7a9f1 | 358 | if (copy_to_user(upad, &kpad, sizeof(kpad))) |
8309f47c | 359 | ret = -EFAULT; |
b3b7a9f1 | 360 | upad++; |
8309f47c MCC |
361 | } |
362 | topo->num_pads = i; | |
363 | ||
364 | /* Get links and number of links */ | |
365 | i = 0; | |
b3b7a9f1 | 366 | ulink = media_get_uptr(topo->ptr_links); |
8309f47c | 367 | media_device_for_each_link(link, mdev) { |
39d1ebc6 MCC |
368 | if (link->is_backlink) |
369 | continue; | |
370 | ||
8309f47c MCC |
371 | i++; |
372 | ||
b3b7a9f1 | 373 | if (ret || !ulink) |
8309f47c MCC |
374 | continue; |
375 | ||
376 | if (i > topo->num_links) { | |
377 | ret = -ENOSPC; | |
378 | continue; | |
379 | } | |
380 | ||
b3b7a9f1 | 381 | memset(&klink, 0, sizeof(klink)); |
8309f47c MCC |
382 | |
383 | /* Copy link fields to userspace struct */ | |
b3b7a9f1 MCC |
384 | klink.id = link->graph_obj.id; |
385 | klink.source_id = link->gobj0->id; | |
386 | klink.sink_id = link->gobj1->id; | |
387 | klink.flags = link->flags; | |
8309f47c | 388 | |
b3b7a9f1 | 389 | if (copy_to_user(ulink, &klink, sizeof(klink))) |
8309f47c | 390 | ret = -EFAULT; |
b3b7a9f1 | 391 | ulink++; |
8309f47c MCC |
392 | } |
393 | topo->num_links = i; | |
394 | ||
395 | return ret; | |
396 | } | |
397 | ||
398 | static long media_device_get_topology(struct media_device *mdev, | |
399 | struct media_v2_topology __user *utopo) | |
400 | { | |
401 | struct media_v2_topology ktopo; | |
402 | int ret; | |
403 | ||
a5c82e56 DC |
404 | if (copy_from_user(&ktopo, utopo, sizeof(ktopo))) |
405 | return -EFAULT; | |
8309f47c MCC |
406 | |
407 | ret = __media_device_get_topology(mdev, &ktopo); | |
408 | if (ret < 0) | |
409 | return ret; | |
410 | ||
a5c82e56 DC |
411 | if (copy_to_user(utopo, &ktopo, sizeof(*utopo))) |
412 | return -EFAULT; | |
8309f47c | 413 | |
a5c82e56 | 414 | return 0; |
8309f47c | 415 | } |
be0270ec | 416 | #endif |
8309f47c | 417 | |
140d8816 LP |
418 | static long media_device_ioctl(struct file *filp, unsigned int cmd, |
419 | unsigned long arg) | |
420 | { | |
421 | struct media_devnode *devnode = media_devnode_data(filp); | |
422 | struct media_device *dev = to_media_device(devnode); | |
423 | long ret; | |
424 | ||
425 | switch (cmd) { | |
426 | case MEDIA_IOC_DEVICE_INFO: | |
427 | ret = media_device_get_info(dev, | |
428 | (struct media_device_info __user *)arg); | |
429 | break; | |
430 | ||
1651333b LP |
431 | case MEDIA_IOC_ENUM_ENTITIES: |
432 | ret = media_device_enum_entities(dev, | |
433 | (struct media_entity_desc __user *)arg); | |
434 | break; | |
435 | ||
436 | case MEDIA_IOC_ENUM_LINKS: | |
437 | mutex_lock(&dev->graph_mutex); | |
438 | ret = media_device_enum_links(dev, | |
439 | (struct media_links_enum __user *)arg); | |
440 | mutex_unlock(&dev->graph_mutex); | |
441 | break; | |
442 | ||
97548ed4 LP |
443 | case MEDIA_IOC_SETUP_LINK: |
444 | mutex_lock(&dev->graph_mutex); | |
445 | ret = media_device_setup_link(dev, | |
446 | (struct media_link_desc __user *)arg); | |
447 | mutex_unlock(&dev->graph_mutex); | |
448 | break; | |
449 | ||
be0270ec | 450 | #if 0 /* Let's postpone it to Kernel 4.6 */ |
8309f47c MCC |
451 | case MEDIA_IOC_G_TOPOLOGY: |
452 | mutex_lock(&dev->graph_mutex); | |
453 | ret = media_device_get_topology(dev, | |
454 | (struct media_v2_topology __user *)arg); | |
455 | mutex_unlock(&dev->graph_mutex); | |
456 | break; | |
be0270ec | 457 | #endif |
140d8816 LP |
458 | default: |
459 | ret = -ENOIOCTLCMD; | |
460 | } | |
461 | ||
462 | return ret; | |
463 | } | |
464 | ||
b0a1f2a8 SA |
465 | #ifdef CONFIG_COMPAT |
466 | ||
467 | struct media_links_enum32 { | |
468 | __u32 entity; | |
469 | compat_uptr_t pads; /* struct media_pad_desc * */ | |
470 | compat_uptr_t links; /* struct media_link_desc * */ | |
471 | __u32 reserved[4]; | |
472 | }; | |
473 | ||
474 | static long media_device_enum_links32(struct media_device *mdev, | |
475 | struct media_links_enum32 __user *ulinks) | |
476 | { | |
477 | struct media_links_enum links; | |
478 | compat_uptr_t pads_ptr, links_ptr; | |
479 | ||
480 | memset(&links, 0, sizeof(links)); | |
481 | ||
482 | if (get_user(links.entity, &ulinks->entity) | |
483 | || get_user(pads_ptr, &ulinks->pads) | |
484 | || get_user(links_ptr, &ulinks->links)) | |
485 | return -EFAULT; | |
486 | ||
487 | links.pads = compat_ptr(pads_ptr); | |
488 | links.links = compat_ptr(links_ptr); | |
489 | ||
490 | return __media_device_enum_links(mdev, &links); | |
491 | } | |
492 | ||
493 | #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32) | |
494 | ||
495 | static long media_device_compat_ioctl(struct file *filp, unsigned int cmd, | |
496 | unsigned long arg) | |
497 | { | |
498 | struct media_devnode *devnode = media_devnode_data(filp); | |
499 | struct media_device *dev = to_media_device(devnode); | |
500 | long ret; | |
501 | ||
502 | switch (cmd) { | |
503 | case MEDIA_IOC_DEVICE_INFO: | |
504 | case MEDIA_IOC_ENUM_ENTITIES: | |
505 | case MEDIA_IOC_SETUP_LINK: | |
be0270ec | 506 | #if 0 /* Let's postpone it to Kernel 4.6 */ |
8309f47c | 507 | case MEDIA_IOC_G_TOPOLOGY: |
be0270ec | 508 | #endif |
b0a1f2a8 SA |
509 | return media_device_ioctl(filp, cmd, arg); |
510 | ||
511 | case MEDIA_IOC_ENUM_LINKS32: | |
512 | mutex_lock(&dev->graph_mutex); | |
513 | ret = media_device_enum_links32(dev, | |
514 | (struct media_links_enum32 __user *)arg); | |
515 | mutex_unlock(&dev->graph_mutex); | |
516 | break; | |
517 | ||
518 | default: | |
519 | ret = -ENOIOCTLCMD; | |
520 | } | |
521 | ||
522 | return ret; | |
523 | } | |
524 | #endif /* CONFIG_COMPAT */ | |
525 | ||
176fb0d1 LP |
526 | static const struct media_file_operations media_device_fops = { |
527 | .owner = THIS_MODULE, | |
140d8816 LP |
528 | .open = media_device_open, |
529 | .ioctl = media_device_ioctl, | |
b0a1f2a8 SA |
530 | #ifdef CONFIG_COMPAT |
531 | .compat_ioctl = media_device_compat_ioctl, | |
532 | #endif /* CONFIG_COMPAT */ | |
140d8816 | 533 | .release = media_device_close, |
176fb0d1 LP |
534 | }; |
535 | ||
536 | /* ----------------------------------------------------------------------------- | |
537 | * sysfs | |
538 | */ | |
539 | ||
540 | static ssize_t show_model(struct device *cd, | |
541 | struct device_attribute *attr, char *buf) | |
542 | { | |
543 | struct media_device *mdev = to_media_device(to_media_devnode(cd)); | |
544 | ||
545 | return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model); | |
546 | } | |
547 | ||
548 | static DEVICE_ATTR(model, S_IRUGO, show_model, NULL); | |
549 | ||
550 | /* ----------------------------------------------------------------------------- | |
551 | * Registration/unregistration | |
552 | */ | |
553 | ||
554 | static void media_device_release(struct media_devnode *mdev) | |
555 | { | |
8f5a3188 | 556 | dev_dbg(mdev->parent, "Media device released\n"); |
176fb0d1 LP |
557 | } |
558 | ||
b2ed8af9 MCC |
559 | /** |
560 | * media_device_register_entity - Register an entity with a media device | |
561 | * @mdev: The media device | |
562 | * @entity: The entity | |
563 | */ | |
564 | int __must_check media_device_register_entity(struct media_device *mdev, | |
565 | struct media_entity *entity) | |
566 | { | |
567 | unsigned int i; | |
ba0dd729 | 568 | int ret; |
b2ed8af9 MCC |
569 | |
570 | if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN || | |
571 | entity->function == MEDIA_ENT_F_UNKNOWN) | |
572 | dev_warn(mdev->dev, | |
573 | "Entity type for entity %s was not initialized!\n", | |
574 | entity->name); | |
575 | ||
576 | /* Warn if we apparently re-register an entity */ | |
577 | WARN_ON(entity->graph_obj.mdev != NULL); | |
578 | entity->graph_obj.mdev = mdev; | |
579 | INIT_LIST_HEAD(&entity->links); | |
580 | entity->num_links = 0; | |
581 | entity->num_backlinks = 0; | |
582 | ||
ba0dd729 MCC |
583 | if (!ida_pre_get(&mdev->entity_internal_idx, GFP_KERNEL)) |
584 | return -ENOMEM; | |
585 | ||
b2ed8af9 | 586 | spin_lock(&mdev->lock); |
665faa97 | 587 | |
ba0dd729 MCC |
588 | ret = ida_get_new_above(&mdev->entity_internal_idx, 1, |
589 | &entity->internal_idx); | |
590 | if (ret < 0) { | |
665faa97 | 591 | spin_unlock(&mdev->lock); |
ba0dd729 | 592 | return ret; |
665faa97 SA |
593 | } |
594 | ||
595 | mdev->entity_internal_idx_max = | |
596 | max(mdev->entity_internal_idx_max, entity->internal_idx); | |
597 | ||
b2ed8af9 MCC |
598 | /* Initialize media_gobj embedded at the entity */ |
599 | media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj); | |
600 | ||
601 | /* Initialize objects at the pads */ | |
602 | for (i = 0; i < entity->num_pads; i++) | |
603 | media_gobj_create(mdev, MEDIA_GRAPH_PAD, | |
604 | &entity->pads[i].graph_obj); | |
605 | ||
606 | spin_unlock(&mdev->lock); | |
607 | ||
608 | return 0; | |
609 | } | |
610 | EXPORT_SYMBOL_GPL(media_device_register_entity); | |
611 | ||
821ed366 | 612 | static void __media_device_unregister_entity(struct media_entity *entity) |
b2ed8af9 MCC |
613 | { |
614 | struct media_device *mdev = entity->graph_obj.mdev; | |
615 | struct media_link *link, *tmp; | |
616 | struct media_interface *intf; | |
617 | unsigned int i; | |
618 | ||
665faa97 SA |
619 | ida_simple_remove(&mdev->entity_internal_idx, entity->internal_idx); |
620 | ||
b2ed8af9 MCC |
621 | /* Remove all interface links pointing to this entity */ |
622 | list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) { | |
623 | list_for_each_entry_safe(link, tmp, &intf->links, list) { | |
624 | if (link->entity == entity) | |
625 | __media_remove_intf_link(link); | |
626 | } | |
627 | } | |
628 | ||
629 | /* Remove all data links that belong to this entity */ | |
630 | __media_entity_remove_links(entity); | |
631 | ||
632 | /* Remove all pads that belong to this entity */ | |
633 | for (i = 0; i < entity->num_pads; i++) | |
634 | media_gobj_destroy(&entity->pads[i].graph_obj); | |
635 | ||
636 | /* Remove the entity */ | |
637 | media_gobj_destroy(&entity->graph_obj); | |
638 | ||
b2ed8af9 MCC |
639 | entity->graph_obj.mdev = NULL; |
640 | } | |
821ed366 MCC |
641 | |
642 | void media_device_unregister_entity(struct media_entity *entity) | |
643 | { | |
644 | struct media_device *mdev = entity->graph_obj.mdev; | |
645 | ||
646 | if (mdev == NULL) | |
647 | return; | |
648 | ||
649 | spin_lock(&mdev->lock); | |
650 | __media_device_unregister_entity(entity); | |
651 | spin_unlock(&mdev->lock); | |
652 | } | |
b2ed8af9 MCC |
653 | EXPORT_SYMBOL_GPL(media_device_unregister_entity); |
654 | ||
176fb0d1 | 655 | /** |
9832e155 | 656 | * media_device_init() - initialize a media device |
176fb0d1 LP |
657 | * @mdev: The media device |
658 | * | |
659 | * The caller is responsible for initializing the media device before | |
660 | * registration. The following fields must be set: | |
661 | * | |
662 | * - dev must point to the parent device | |
663 | * - model must be filled with the device model name | |
664 | */ | |
9832e155 | 665 | void media_device_init(struct media_device *mdev) |
176fb0d1 | 666 | { |
53e269c1 | 667 | INIT_LIST_HEAD(&mdev->entities); |
57cf79b7 | 668 | INIT_LIST_HEAD(&mdev->interfaces); |
9155d859 MCC |
669 | INIT_LIST_HEAD(&mdev->pads); |
670 | INIT_LIST_HEAD(&mdev->links); | |
53e269c1 | 671 | spin_lock_init(&mdev->lock); |
503c3d82 | 672 | mutex_init(&mdev->graph_mutex); |
665faa97 | 673 | ida_init(&mdev->entity_internal_idx); |
53e269c1 | 674 | |
9832e155 JMC |
675 | dev_dbg(mdev->dev, "Media device initialized\n"); |
676 | } | |
677 | EXPORT_SYMBOL_GPL(media_device_init); | |
678 | ||
9832e155 JMC |
679 | void media_device_cleanup(struct media_device *mdev) |
680 | { | |
665faa97 SA |
681 | ida_destroy(&mdev->entity_internal_idx); |
682 | mdev->entity_internal_idx_max = 0; | |
9832e155 JMC |
683 | mutex_destroy(&mdev->graph_mutex); |
684 | } | |
685 | EXPORT_SYMBOL_GPL(media_device_cleanup); | |
686 | ||
9832e155 JMC |
687 | int __must_check __media_device_register(struct media_device *mdev, |
688 | struct module *owner) | |
689 | { | |
690 | int ret; | |
691 | ||
176fb0d1 LP |
692 | /* Register the device node. */ |
693 | mdev->devnode.fops = &media_device_fops; | |
694 | mdev->devnode.parent = mdev->dev; | |
695 | mdev->devnode.release = media_device_release; | |
8a950796 JMC |
696 | |
697 | /* Set version 0 to indicate user-space that the graph is static */ | |
698 | mdev->topology_version = 0; | |
699 | ||
85de721c | 700 | ret = media_devnode_register(&mdev->devnode, owner); |
176fb0d1 LP |
701 | if (ret < 0) |
702 | return ret; | |
703 | ||
704 | ret = device_create_file(&mdev->devnode.dev, &dev_attr_model); | |
705 | if (ret < 0) { | |
706 | media_devnode_unregister(&mdev->devnode); | |
707 | return ret; | |
708 | } | |
709 | ||
8f5a3188 MCC |
710 | dev_dbg(mdev->dev, "Media device registered\n"); |
711 | ||
176fb0d1 LP |
712 | return 0; |
713 | } | |
85de721c | 714 | EXPORT_SYMBOL_GPL(__media_device_register); |
176fb0d1 | 715 | |
176fb0d1 LP |
716 | void media_device_unregister(struct media_device *mdev) |
717 | { | |
53e269c1 LP |
718 | struct media_entity *entity; |
719 | struct media_entity *next; | |
d47109fa MCC |
720 | struct media_interface *intf, *tmp_intf; |
721 | ||
821ed366 MCC |
722 | if (mdev == NULL) |
723 | return; | |
724 | ||
725 | spin_lock(&mdev->lock); | |
726 | ||
223d19c5 | 727 | /* Check if mdev was ever registered at all */ |
821ed366 MCC |
728 | if (!media_devnode_is_registered(&mdev->devnode)) { |
729 | spin_unlock(&mdev->lock); | |
223d19c5 | 730 | return; |
821ed366 | 731 | } |
223d19c5 | 732 | |
f50d5166 MCC |
733 | /* Remove all entities from the media device */ |
734 | list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list) | |
821ed366 | 735 | __media_device_unregister_entity(entity); |
f50d5166 | 736 | |
d47109fa | 737 | /* Remove all interfaces from the media device */ |
d47109fa MCC |
738 | list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces, |
739 | graph_obj.list) { | |
740 | __media_remove_intf_links(intf); | |
c350ef83 | 741 | media_gobj_destroy(&intf->graph_obj); |
d47109fa MCC |
742 | kfree(intf); |
743 | } | |
821ed366 | 744 | |
d47109fa | 745 | spin_unlock(&mdev->lock); |
53e269c1 | 746 | |
176fb0d1 LP |
747 | device_remove_file(&mdev->devnode.dev, &dev_attr_model); |
748 | media_devnode_unregister(&mdev->devnode); | |
8f5a3188 MCC |
749 | |
750 | dev_dbg(mdev->dev, "Media device unregistered\n"); | |
176fb0d1 LP |
751 | } |
752 | EXPORT_SYMBOL_GPL(media_device_unregister); | |
53e269c1 | 753 | |
d062f911 SK |
754 | static void media_device_release_devres(struct device *dev, void *res) |
755 | { | |
756 | } | |
757 | ||
d062f911 SK |
758 | struct media_device *media_device_get_devres(struct device *dev) |
759 | { | |
760 | struct media_device *mdev; | |
761 | ||
762 | mdev = devres_find(dev, media_device_release_devres, NULL, NULL); | |
763 | if (mdev) | |
764 | return mdev; | |
765 | ||
766 | mdev = devres_alloc(media_device_release_devres, | |
767 | sizeof(struct media_device), GFP_KERNEL); | |
768 | if (!mdev) | |
769 | return NULL; | |
770 | return devres_get(dev, mdev, NULL, NULL); | |
771 | } | |
772 | EXPORT_SYMBOL_GPL(media_device_get_devres); | |
773 | ||
d062f911 SK |
774 | struct media_device *media_device_find_devres(struct device *dev) |
775 | { | |
776 | return devres_find(dev, media_device_release_devres, NULL, NULL); | |
777 | } | |
778 | EXPORT_SYMBOL_GPL(media_device_find_devres); | |
e576d60b SK |
779 | |
780 | #endif /* CONFIG_MEDIA_CONTROLLER */ |