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> |
41b44e35 MCC |
33 | #include <linux/pci.h> |
34 | #include <linux/usb.h> | |
176fb0d1 LP |
35 | |
36 | #include <media/media-device.h> | |
37 | #include <media/media-devnode.h> | |
53e269c1 | 38 | #include <media/media-entity.h> |
176fb0d1 | 39 | |
e576d60b SK |
40 | #ifdef CONFIG_MEDIA_CONTROLLER |
41 | ||
140d8816 LP |
42 | /* ----------------------------------------------------------------------------- |
43 | * Userspace API | |
44 | */ | |
45 | ||
0629e991 SA |
46 | static inline void __user *media_get_uptr(__u64 arg) |
47 | { | |
48 | return (void __user *)(uintptr_t)arg; | |
49 | } | |
50 | ||
140d8816 LP |
51 | static int media_device_open(struct file *filp) |
52 | { | |
53 | return 0; | |
54 | } | |
55 | ||
56 | static int media_device_close(struct file *filp) | |
57 | { | |
58 | return 0; | |
59 | } | |
60 | ||
61 | static int media_device_get_info(struct media_device *dev, | |
62 | struct media_device_info __user *__info) | |
63 | { | |
64 | struct media_device_info info; | |
65 | ||
66 | memset(&info, 0, sizeof(info)); | |
67 | ||
bb07bd6b MCC |
68 | if (dev->driver_name[0]) |
69 | strlcpy(info.driver, dev->driver_name, sizeof(info.driver)); | |
70 | else | |
71 | strlcpy(info.driver, dev->dev->driver->name, sizeof(info.driver)); | |
72 | ||
140d8816 LP |
73 | strlcpy(info.model, dev->model, sizeof(info.model)); |
74 | strlcpy(info.serial, dev->serial, sizeof(info.serial)); | |
75 | strlcpy(info.bus_info, dev->bus_info, sizeof(info.bus_info)); | |
76 | ||
77 | info.media_version = MEDIA_API_VERSION; | |
78 | info.hw_revision = dev->hw_revision; | |
79 | info.driver_version = dev->driver_version; | |
80 | ||
b17d3945 NT |
81 | if (copy_to_user(__info, &info, sizeof(*__info))) |
82 | return -EFAULT; | |
83 | return 0; | |
140d8816 LP |
84 | } |
85 | ||
1651333b LP |
86 | static struct media_entity *find_entity(struct media_device *mdev, u32 id) |
87 | { | |
88 | struct media_entity *entity; | |
89 | int next = id & MEDIA_ENT_ID_FLAG_NEXT; | |
90 | ||
91 | id &= ~MEDIA_ENT_ID_FLAG_NEXT; | |
92 | ||
93 | spin_lock(&mdev->lock); | |
94 | ||
95 | media_device_for_each_entity(entity, mdev) { | |
fa762394 MCC |
96 | if (((media_entity_id(entity) == id) && !next) || |
97 | ((media_entity_id(entity) > id) && next)) { | |
1651333b LP |
98 | spin_unlock(&mdev->lock); |
99 | return entity; | |
100 | } | |
101 | } | |
102 | ||
103 | spin_unlock(&mdev->lock); | |
104 | ||
105 | return NULL; | |
106 | } | |
107 | ||
108 | static long media_device_enum_entities(struct media_device *mdev, | |
109 | struct media_entity_desc __user *uent) | |
110 | { | |
111 | struct media_entity *ent; | |
112 | struct media_entity_desc u_ent; | |
113 | ||
e6a62346 | 114 | memset(&u_ent, 0, sizeof(u_ent)); |
1651333b LP |
115 | if (copy_from_user(&u_ent.id, &uent->id, sizeof(u_ent.id))) |
116 | return -EFAULT; | |
117 | ||
118 | ent = find_entity(mdev, u_ent.id); | |
119 | ||
120 | if (ent == NULL) | |
121 | return -EINVAL; | |
122 | ||
fa762394 | 123 | u_ent.id = media_entity_id(ent); |
de8eae36 LP |
124 | if (ent->name) |
125 | strlcpy(u_ent.name, ent->name, sizeof(u_ent.name)); | |
0e576b76 | 126 | u_ent.type = ent->function; |
8ed8c88c | 127 | u_ent.revision = 0; /* Unused */ |
1651333b | 128 | u_ent.flags = ent->flags; |
8ed8c88c | 129 | u_ent.group_id = 0; /* Unused */ |
1651333b LP |
130 | u_ent.pads = ent->num_pads; |
131 | u_ent.links = ent->num_links - ent->num_backlinks; | |
b2cd2744 MCC |
132 | |
133 | /* | |
134 | * Workaround for a bug at media-ctl <= v1.10 that makes it to | |
135 | * do the wrong thing if the entity function doesn't belong to | |
136 | * either MEDIA_ENT_F_OLD_BASE or MEDIA_ENT_F_OLD_SUBDEV_BASE | |
137 | * Ranges. | |
138 | * | |
139 | * Non-subdevices are expected to be at the MEDIA_ENT_F_OLD_BASE, | |
140 | * or, otherwise, will be silently ignored by media-ctl when | |
141 | * printing the graphviz diagram. So, map them into the devnode | |
142 | * old range. | |
143 | */ | |
144 | if (ent->function < MEDIA_ENT_F_OLD_BASE || | |
145 | ent->function > MEDIA_ENT_T_DEVNODE_UNKNOWN) { | |
146 | if (is_media_entity_v4l2_subdev(ent)) | |
147 | u_ent.type = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN; | |
148 | else if (ent->function != MEDIA_ENT_F_IO_V4L) | |
149 | u_ent.type = MEDIA_ENT_T_DEVNODE_UNKNOWN; | |
150 | } | |
151 | ||
fa5034c6 | 152 | memcpy(&u_ent.raw, &ent->info, sizeof(ent->info)); |
1651333b LP |
153 | if (copy_to_user(uent, &u_ent, sizeof(u_ent))) |
154 | return -EFAULT; | |
155 | return 0; | |
156 | } | |
157 | ||
158 | static void media_device_kpad_to_upad(const struct media_pad *kpad, | |
159 | struct media_pad_desc *upad) | |
160 | { | |
fa762394 | 161 | upad->entity = media_entity_id(kpad->entity); |
1651333b LP |
162 | upad->index = kpad->index; |
163 | upad->flags = kpad->flags; | |
164 | } | |
165 | ||
b0a1f2a8 SA |
166 | static long __media_device_enum_links(struct media_device *mdev, |
167 | struct media_links_enum *links) | |
1651333b LP |
168 | { |
169 | struct media_entity *entity; | |
1651333b | 170 | |
b0a1f2a8 | 171 | entity = find_entity(mdev, links->entity); |
1651333b LP |
172 | if (entity == NULL) |
173 | return -EINVAL; | |
174 | ||
b0a1f2a8 | 175 | if (links->pads) { |
1651333b LP |
176 | unsigned int p; |
177 | ||
178 | for (p = 0; p < entity->num_pads; p++) { | |
179 | struct media_pad_desc pad; | |
c88e739b DC |
180 | |
181 | memset(&pad, 0, sizeof(pad)); | |
1651333b | 182 | media_device_kpad_to_upad(&entity->pads[p], &pad); |
b0a1f2a8 | 183 | if (copy_to_user(&links->pads[p], &pad, sizeof(pad))) |
1651333b LP |
184 | return -EFAULT; |
185 | } | |
186 | } | |
187 | ||
b0a1f2a8 | 188 | if (links->links) { |
b83e2508 MCC |
189 | struct media_link *link; |
190 | struct media_link_desc __user *ulink_desc = links->links; | |
1651333b | 191 | |
b83e2508 MCC |
192 | list_for_each_entry(link, &entity->links, list) { |
193 | struct media_link_desc klink_desc; | |
1651333b LP |
194 | |
195 | /* Ignore backlinks. */ | |
b83e2508 | 196 | if (link->source->entity != entity) |
1651333b | 197 | continue; |
b83e2508 MCC |
198 | memset(&klink_desc, 0, sizeof(klink_desc)); |
199 | media_device_kpad_to_upad(link->source, | |
200 | &klink_desc.source); | |
201 | media_device_kpad_to_upad(link->sink, | |
202 | &klink_desc.sink); | |
203 | klink_desc.flags = link->flags; | |
204 | if (copy_to_user(ulink_desc, &klink_desc, | |
205 | sizeof(*ulink_desc))) | |
1651333b | 206 | return -EFAULT; |
b83e2508 | 207 | ulink_desc++; |
1651333b LP |
208 | } |
209 | } | |
b0a1f2a8 SA |
210 | |
211 | return 0; | |
212 | } | |
213 | ||
214 | static long media_device_enum_links(struct media_device *mdev, | |
215 | struct media_links_enum __user *ulinks) | |
216 | { | |
217 | struct media_links_enum links; | |
218 | int rval; | |
219 | ||
220 | if (copy_from_user(&links, ulinks, sizeof(links))) | |
221 | return -EFAULT; | |
222 | ||
223 | rval = __media_device_enum_links(mdev, &links); | |
224 | if (rval < 0) | |
225 | return rval; | |
226 | ||
1651333b LP |
227 | if (copy_to_user(ulinks, &links, sizeof(*ulinks))) |
228 | return -EFAULT; | |
b0a1f2a8 | 229 | |
1651333b LP |
230 | return 0; |
231 | } | |
232 | ||
97548ed4 LP |
233 | static long media_device_setup_link(struct media_device *mdev, |
234 | struct media_link_desc __user *_ulink) | |
235 | { | |
236 | struct media_link *link = NULL; | |
237 | struct media_link_desc ulink; | |
238 | struct media_entity *source; | |
239 | struct media_entity *sink; | |
240 | int ret; | |
241 | ||
242 | if (copy_from_user(&ulink, _ulink, sizeof(ulink))) | |
243 | return -EFAULT; | |
244 | ||
245 | /* Find the source and sink entities and link. | |
246 | */ | |
247 | source = find_entity(mdev, ulink.source.entity); | |
248 | sink = find_entity(mdev, ulink.sink.entity); | |
249 | ||
250 | if (source == NULL || sink == NULL) | |
251 | return -EINVAL; | |
252 | ||
253 | if (ulink.source.index >= source->num_pads || | |
254 | ulink.sink.index >= sink->num_pads) | |
255 | return -EINVAL; | |
256 | ||
257 | link = media_entity_find_link(&source->pads[ulink.source.index], | |
258 | &sink->pads[ulink.sink.index]); | |
259 | if (link == NULL) | |
260 | return -EINVAL; | |
261 | ||
262 | /* Setup the link on both entities. */ | |
263 | ret = __media_entity_setup_link(link, ulink.flags); | |
264 | ||
265 | if (copy_to_user(_ulink, &ulink, sizeof(ulink))) | |
266 | return -EFAULT; | |
267 | ||
268 | return ret; | |
269 | } | |
270 | ||
8309f47c MCC |
271 | static long __media_device_get_topology(struct media_device *mdev, |
272 | struct media_v2_topology *topo) | |
273 | { | |
274 | struct media_entity *entity; | |
275 | struct media_interface *intf; | |
276 | struct media_pad *pad; | |
277 | struct media_link *link; | |
d37410c2 SA |
278 | struct media_v2_entity kentity, __user *uentity; |
279 | struct media_v2_interface kintf, __user *uintf; | |
280 | struct media_v2_pad kpad, __user *upad; | |
281 | struct media_v2_link klink, __user *ulink; | |
9033b1a4 MCC |
282 | unsigned int i; |
283 | int ret = 0; | |
8309f47c MCC |
284 | |
285 | topo->topology_version = mdev->topology_version; | |
286 | ||
287 | /* Get entities and number of entities */ | |
288 | i = 0; | |
b3b7a9f1 | 289 | uentity = media_get_uptr(topo->ptr_entities); |
8309f47c MCC |
290 | media_device_for_each_entity(entity, mdev) { |
291 | i++; | |
b3b7a9f1 | 292 | if (ret || !uentity) |
8309f47c MCC |
293 | continue; |
294 | ||
295 | if (i > topo->num_entities) { | |
296 | ret = -ENOSPC; | |
297 | continue; | |
298 | } | |
299 | ||
300 | /* Copy fields to userspace struct if not error */ | |
b3b7a9f1 MCC |
301 | memset(&kentity, 0, sizeof(kentity)); |
302 | kentity.id = entity->graph_obj.id; | |
303 | kentity.function = entity->function; | |
304 | strncpy(kentity.name, entity->name, | |
305 | sizeof(kentity.name)); | |
8309f47c | 306 | |
b3b7a9f1 | 307 | if (copy_to_user(uentity, &kentity, sizeof(kentity))) |
8309f47c | 308 | ret = -EFAULT; |
b3b7a9f1 | 309 | uentity++; |
8309f47c MCC |
310 | } |
311 | topo->num_entities = i; | |
312 | ||
313 | /* Get interfaces and number of interfaces */ | |
314 | i = 0; | |
b3b7a9f1 | 315 | uintf = media_get_uptr(topo->ptr_interfaces); |
8309f47c MCC |
316 | media_device_for_each_intf(intf, mdev) { |
317 | i++; | |
b3b7a9f1 | 318 | if (ret || !uintf) |
8309f47c MCC |
319 | continue; |
320 | ||
321 | if (i > topo->num_interfaces) { | |
322 | ret = -ENOSPC; | |
323 | continue; | |
324 | } | |
325 | ||
b3b7a9f1 | 326 | memset(&kintf, 0, sizeof(kintf)); |
8309f47c MCC |
327 | |
328 | /* Copy intf fields to userspace struct */ | |
b3b7a9f1 MCC |
329 | kintf.id = intf->graph_obj.id; |
330 | kintf.intf_type = intf->type; | |
331 | kintf.flags = intf->flags; | |
8309f47c MCC |
332 | |
333 | if (media_type(&intf->graph_obj) == MEDIA_GRAPH_INTF_DEVNODE) { | |
334 | struct media_intf_devnode *devnode; | |
335 | ||
336 | devnode = intf_to_devnode(intf); | |
337 | ||
b3b7a9f1 MCC |
338 | kintf.devnode.major = devnode->major; |
339 | kintf.devnode.minor = devnode->minor; | |
8309f47c MCC |
340 | } |
341 | ||
b3b7a9f1 | 342 | if (copy_to_user(uintf, &kintf, sizeof(kintf))) |
8309f47c | 343 | ret = -EFAULT; |
b3b7a9f1 | 344 | uintf++; |
8309f47c MCC |
345 | } |
346 | topo->num_interfaces = i; | |
347 | ||
348 | /* Get pads and number of pads */ | |
349 | i = 0; | |
b3b7a9f1 | 350 | upad = media_get_uptr(topo->ptr_pads); |
8309f47c MCC |
351 | media_device_for_each_pad(pad, mdev) { |
352 | i++; | |
b3b7a9f1 | 353 | if (ret || !upad) |
8309f47c MCC |
354 | continue; |
355 | ||
356 | if (i > topo->num_pads) { | |
357 | ret = -ENOSPC; | |
358 | continue; | |
359 | } | |
360 | ||
b3b7a9f1 | 361 | memset(&kpad, 0, sizeof(kpad)); |
8309f47c MCC |
362 | |
363 | /* Copy pad fields to userspace struct */ | |
b3b7a9f1 MCC |
364 | kpad.id = pad->graph_obj.id; |
365 | kpad.entity_id = pad->entity->graph_obj.id; | |
366 | kpad.flags = pad->flags; | |
8309f47c | 367 | |
b3b7a9f1 | 368 | if (copy_to_user(upad, &kpad, sizeof(kpad))) |
8309f47c | 369 | ret = -EFAULT; |
b3b7a9f1 | 370 | upad++; |
8309f47c MCC |
371 | } |
372 | topo->num_pads = i; | |
373 | ||
374 | /* Get links and number of links */ | |
375 | i = 0; | |
b3b7a9f1 | 376 | ulink = media_get_uptr(topo->ptr_links); |
8309f47c | 377 | media_device_for_each_link(link, mdev) { |
39d1ebc6 MCC |
378 | if (link->is_backlink) |
379 | continue; | |
380 | ||
8309f47c MCC |
381 | i++; |
382 | ||
b3b7a9f1 | 383 | if (ret || !ulink) |
8309f47c MCC |
384 | continue; |
385 | ||
386 | if (i > topo->num_links) { | |
387 | ret = -ENOSPC; | |
388 | continue; | |
389 | } | |
390 | ||
b3b7a9f1 | 391 | memset(&klink, 0, sizeof(klink)); |
8309f47c MCC |
392 | |
393 | /* Copy link fields to userspace struct */ | |
b3b7a9f1 MCC |
394 | klink.id = link->graph_obj.id; |
395 | klink.source_id = link->gobj0->id; | |
396 | klink.sink_id = link->gobj1->id; | |
397 | klink.flags = link->flags; | |
8309f47c | 398 | |
b3b7a9f1 | 399 | if (copy_to_user(ulink, &klink, sizeof(klink))) |
8309f47c | 400 | ret = -EFAULT; |
b3b7a9f1 | 401 | ulink++; |
8309f47c MCC |
402 | } |
403 | topo->num_links = i; | |
404 | ||
405 | return ret; | |
406 | } | |
407 | ||
408 | static long media_device_get_topology(struct media_device *mdev, | |
409 | struct media_v2_topology __user *utopo) | |
410 | { | |
411 | struct media_v2_topology ktopo; | |
412 | int ret; | |
413 | ||
a5c82e56 DC |
414 | if (copy_from_user(&ktopo, utopo, sizeof(ktopo))) |
415 | return -EFAULT; | |
8309f47c MCC |
416 | |
417 | ret = __media_device_get_topology(mdev, &ktopo); | |
418 | if (ret < 0) | |
419 | return ret; | |
420 | ||
a5c82e56 DC |
421 | if (copy_to_user(utopo, &ktopo, sizeof(*utopo))) |
422 | return -EFAULT; | |
8309f47c | 423 | |
a5c82e56 | 424 | return 0; |
8309f47c MCC |
425 | } |
426 | ||
140d8816 LP |
427 | static long media_device_ioctl(struct file *filp, unsigned int cmd, |
428 | unsigned long arg) | |
429 | { | |
430 | struct media_devnode *devnode = media_devnode_data(filp); | |
431 | struct media_device *dev = to_media_device(devnode); | |
432 | long ret; | |
433 | ||
434 | switch (cmd) { | |
435 | case MEDIA_IOC_DEVICE_INFO: | |
436 | ret = media_device_get_info(dev, | |
437 | (struct media_device_info __user *)arg); | |
438 | break; | |
439 | ||
1651333b LP |
440 | case MEDIA_IOC_ENUM_ENTITIES: |
441 | ret = media_device_enum_entities(dev, | |
442 | (struct media_entity_desc __user *)arg); | |
443 | break; | |
444 | ||
445 | case MEDIA_IOC_ENUM_LINKS: | |
446 | mutex_lock(&dev->graph_mutex); | |
447 | ret = media_device_enum_links(dev, | |
448 | (struct media_links_enum __user *)arg); | |
449 | mutex_unlock(&dev->graph_mutex); | |
450 | break; | |
451 | ||
97548ed4 LP |
452 | case MEDIA_IOC_SETUP_LINK: |
453 | mutex_lock(&dev->graph_mutex); | |
454 | ret = media_device_setup_link(dev, | |
455 | (struct media_link_desc __user *)arg); | |
456 | mutex_unlock(&dev->graph_mutex); | |
457 | break; | |
458 | ||
8309f47c MCC |
459 | case MEDIA_IOC_G_TOPOLOGY: |
460 | mutex_lock(&dev->graph_mutex); | |
461 | ret = media_device_get_topology(dev, | |
462 | (struct media_v2_topology __user *)arg); | |
463 | mutex_unlock(&dev->graph_mutex); | |
464 | break; | |
333a6515 | 465 | |
140d8816 LP |
466 | default: |
467 | ret = -ENOIOCTLCMD; | |
468 | } | |
469 | ||
470 | return ret; | |
471 | } | |
472 | ||
b0a1f2a8 SA |
473 | #ifdef CONFIG_COMPAT |
474 | ||
475 | struct media_links_enum32 { | |
476 | __u32 entity; | |
477 | compat_uptr_t pads; /* struct media_pad_desc * */ | |
478 | compat_uptr_t links; /* struct media_link_desc * */ | |
479 | __u32 reserved[4]; | |
480 | }; | |
481 | ||
482 | static long media_device_enum_links32(struct media_device *mdev, | |
483 | struct media_links_enum32 __user *ulinks) | |
484 | { | |
485 | struct media_links_enum links; | |
486 | compat_uptr_t pads_ptr, links_ptr; | |
487 | ||
488 | memset(&links, 0, sizeof(links)); | |
489 | ||
490 | if (get_user(links.entity, &ulinks->entity) | |
491 | || get_user(pads_ptr, &ulinks->pads) | |
492 | || get_user(links_ptr, &ulinks->links)) | |
493 | return -EFAULT; | |
494 | ||
495 | links.pads = compat_ptr(pads_ptr); | |
496 | links.links = compat_ptr(links_ptr); | |
497 | ||
498 | return __media_device_enum_links(mdev, &links); | |
499 | } | |
500 | ||
501 | #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32) | |
502 | ||
503 | static long media_device_compat_ioctl(struct file *filp, unsigned int cmd, | |
504 | unsigned long arg) | |
505 | { | |
506 | struct media_devnode *devnode = media_devnode_data(filp); | |
507 | struct media_device *dev = to_media_device(devnode); | |
508 | long ret; | |
509 | ||
510 | switch (cmd) { | |
511 | case MEDIA_IOC_DEVICE_INFO: | |
512 | case MEDIA_IOC_ENUM_ENTITIES: | |
513 | case MEDIA_IOC_SETUP_LINK: | |
8309f47c | 514 | case MEDIA_IOC_G_TOPOLOGY: |
b0a1f2a8 SA |
515 | return media_device_ioctl(filp, cmd, arg); |
516 | ||
517 | case MEDIA_IOC_ENUM_LINKS32: | |
518 | mutex_lock(&dev->graph_mutex); | |
519 | ret = media_device_enum_links32(dev, | |
520 | (struct media_links_enum32 __user *)arg); | |
521 | mutex_unlock(&dev->graph_mutex); | |
522 | break; | |
523 | ||
524 | default: | |
525 | ret = -ENOIOCTLCMD; | |
526 | } | |
527 | ||
528 | return ret; | |
529 | } | |
530 | #endif /* CONFIG_COMPAT */ | |
531 | ||
176fb0d1 LP |
532 | static const struct media_file_operations media_device_fops = { |
533 | .owner = THIS_MODULE, | |
140d8816 LP |
534 | .open = media_device_open, |
535 | .ioctl = media_device_ioctl, | |
b0a1f2a8 SA |
536 | #ifdef CONFIG_COMPAT |
537 | .compat_ioctl = media_device_compat_ioctl, | |
538 | #endif /* CONFIG_COMPAT */ | |
140d8816 | 539 | .release = media_device_close, |
176fb0d1 LP |
540 | }; |
541 | ||
542 | /* ----------------------------------------------------------------------------- | |
543 | * sysfs | |
544 | */ | |
545 | ||
546 | static ssize_t show_model(struct device *cd, | |
547 | struct device_attribute *attr, char *buf) | |
548 | { | |
549 | struct media_device *mdev = to_media_device(to_media_devnode(cd)); | |
550 | ||
551 | return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model); | |
552 | } | |
553 | ||
554 | static DEVICE_ATTR(model, S_IRUGO, show_model, NULL); | |
555 | ||
556 | /* ----------------------------------------------------------------------------- | |
557 | * Registration/unregistration | |
558 | */ | |
559 | ||
560 | static void media_device_release(struct media_devnode *mdev) | |
561 | { | |
8f5a3188 | 562 | dev_dbg(mdev->parent, "Media device released\n"); |
176fb0d1 LP |
563 | } |
564 | ||
b2ed8af9 MCC |
565 | /** |
566 | * media_device_register_entity - Register an entity with a media device | |
567 | * @mdev: The media device | |
568 | * @entity: The entity | |
569 | */ | |
570 | int __must_check media_device_register_entity(struct media_device *mdev, | |
571 | struct media_entity *entity) | |
572 | { | |
afcbdb55 | 573 | struct media_entity_notify *notify, *next; |
b2ed8af9 | 574 | unsigned int i; |
ba0dd729 | 575 | int ret; |
b2ed8af9 MCC |
576 | |
577 | if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN || | |
578 | entity->function == MEDIA_ENT_F_UNKNOWN) | |
579 | dev_warn(mdev->dev, | |
580 | "Entity type for entity %s was not initialized!\n", | |
581 | entity->name); | |
582 | ||
583 | /* Warn if we apparently re-register an entity */ | |
584 | WARN_ON(entity->graph_obj.mdev != NULL); | |
585 | entity->graph_obj.mdev = mdev; | |
586 | INIT_LIST_HEAD(&entity->links); | |
587 | entity->num_links = 0; | |
588 | entity->num_backlinks = 0; | |
589 | ||
ba0dd729 MCC |
590 | if (!ida_pre_get(&mdev->entity_internal_idx, GFP_KERNEL)) |
591 | return -ENOMEM; | |
592 | ||
b2ed8af9 | 593 | spin_lock(&mdev->lock); |
665faa97 | 594 | |
ba0dd729 MCC |
595 | ret = ida_get_new_above(&mdev->entity_internal_idx, 1, |
596 | &entity->internal_idx); | |
597 | if (ret < 0) { | |
665faa97 | 598 | spin_unlock(&mdev->lock); |
ba0dd729 | 599 | return ret; |
665faa97 SA |
600 | } |
601 | ||
602 | mdev->entity_internal_idx_max = | |
603 | max(mdev->entity_internal_idx_max, entity->internal_idx); | |
604 | ||
b2ed8af9 MCC |
605 | /* Initialize media_gobj embedded at the entity */ |
606 | media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj); | |
607 | ||
608 | /* Initialize objects at the pads */ | |
609 | for (i = 0; i < entity->num_pads; i++) | |
610 | media_gobj_create(mdev, MEDIA_GRAPH_PAD, | |
611 | &entity->pads[i].graph_obj); | |
612 | ||
afcbdb55 SK |
613 | /* invoke entity_notify callbacks */ |
614 | list_for_each_entry_safe(notify, next, &mdev->entity_notify, list) { | |
615 | (notify)->notify(entity, notify->notify_data); | |
616 | } | |
617 | ||
b2ed8af9 MCC |
618 | spin_unlock(&mdev->lock); |
619 | ||
0c426c47 SA |
620 | mutex_lock(&mdev->graph_mutex); |
621 | if (mdev->entity_internal_idx_max | |
622 | >= mdev->pm_count_walk.ent_enum.idx_max) { | |
623 | struct media_entity_graph new = { .top = 0 }; | |
624 | ||
625 | /* | |
626 | * Initialise the new graph walk before cleaning up | |
627 | * the old one in order not to spoil the graph walk | |
628 | * object of the media device if graph walk init fails. | |
629 | */ | |
630 | ret = media_entity_graph_walk_init(&new, mdev); | |
631 | if (ret) { | |
632 | mutex_unlock(&mdev->graph_mutex); | |
633 | return ret; | |
634 | } | |
635 | media_entity_graph_walk_cleanup(&mdev->pm_count_walk); | |
636 | mdev->pm_count_walk = new; | |
637 | } | |
638 | mutex_unlock(&mdev->graph_mutex); | |
639 | ||
b2ed8af9 MCC |
640 | return 0; |
641 | } | |
642 | EXPORT_SYMBOL_GPL(media_device_register_entity); | |
643 | ||
821ed366 | 644 | static void __media_device_unregister_entity(struct media_entity *entity) |
b2ed8af9 MCC |
645 | { |
646 | struct media_device *mdev = entity->graph_obj.mdev; | |
647 | struct media_link *link, *tmp; | |
648 | struct media_interface *intf; | |
649 | unsigned int i; | |
650 | ||
665faa97 SA |
651 | ida_simple_remove(&mdev->entity_internal_idx, entity->internal_idx); |
652 | ||
b2ed8af9 MCC |
653 | /* Remove all interface links pointing to this entity */ |
654 | list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) { | |
655 | list_for_each_entry_safe(link, tmp, &intf->links, list) { | |
656 | if (link->entity == entity) | |
657 | __media_remove_intf_link(link); | |
658 | } | |
659 | } | |
660 | ||
661 | /* Remove all data links that belong to this entity */ | |
662 | __media_entity_remove_links(entity); | |
663 | ||
664 | /* Remove all pads that belong to this entity */ | |
665 | for (i = 0; i < entity->num_pads; i++) | |
666 | media_gobj_destroy(&entity->pads[i].graph_obj); | |
667 | ||
668 | /* Remove the entity */ | |
669 | media_gobj_destroy(&entity->graph_obj); | |
670 | ||
afcbdb55 SK |
671 | /* invoke entity_notify callbacks to handle entity removal?? */ |
672 | ||
b2ed8af9 MCC |
673 | entity->graph_obj.mdev = NULL; |
674 | } | |
821ed366 MCC |
675 | |
676 | void media_device_unregister_entity(struct media_entity *entity) | |
677 | { | |
678 | struct media_device *mdev = entity->graph_obj.mdev; | |
679 | ||
680 | if (mdev == NULL) | |
681 | return; | |
682 | ||
683 | spin_lock(&mdev->lock); | |
684 | __media_device_unregister_entity(entity); | |
685 | spin_unlock(&mdev->lock); | |
686 | } | |
b2ed8af9 MCC |
687 | EXPORT_SYMBOL_GPL(media_device_unregister_entity); |
688 | ||
176fb0d1 | 689 | /** |
9832e155 | 690 | * media_device_init() - initialize a media device |
176fb0d1 LP |
691 | * @mdev: The media device |
692 | * | |
693 | * The caller is responsible for initializing the media device before | |
694 | * registration. The following fields must be set: | |
695 | * | |
696 | * - dev must point to the parent device | |
697 | * - model must be filled with the device model name | |
698 | */ | |
9832e155 | 699 | void media_device_init(struct media_device *mdev) |
176fb0d1 | 700 | { |
53e269c1 | 701 | INIT_LIST_HEAD(&mdev->entities); |
57cf79b7 | 702 | INIT_LIST_HEAD(&mdev->interfaces); |
9155d859 MCC |
703 | INIT_LIST_HEAD(&mdev->pads); |
704 | INIT_LIST_HEAD(&mdev->links); | |
afcbdb55 | 705 | INIT_LIST_HEAD(&mdev->entity_notify); |
53e269c1 | 706 | spin_lock_init(&mdev->lock); |
503c3d82 | 707 | mutex_init(&mdev->graph_mutex); |
665faa97 | 708 | ida_init(&mdev->entity_internal_idx); |
53e269c1 | 709 | |
9832e155 JMC |
710 | dev_dbg(mdev->dev, "Media device initialized\n"); |
711 | } | |
712 | EXPORT_SYMBOL_GPL(media_device_init); | |
713 | ||
9832e155 JMC |
714 | void media_device_cleanup(struct media_device *mdev) |
715 | { | |
665faa97 SA |
716 | ida_destroy(&mdev->entity_internal_idx); |
717 | mdev->entity_internal_idx_max = 0; | |
0c426c47 | 718 | media_entity_graph_walk_cleanup(&mdev->pm_count_walk); |
9832e155 JMC |
719 | mutex_destroy(&mdev->graph_mutex); |
720 | } | |
721 | EXPORT_SYMBOL_GPL(media_device_cleanup); | |
722 | ||
9832e155 JMC |
723 | int __must_check __media_device_register(struct media_device *mdev, |
724 | struct module *owner) | |
725 | { | |
726 | int ret; | |
727 | ||
176fb0d1 LP |
728 | /* Register the device node. */ |
729 | mdev->devnode.fops = &media_device_fops; | |
730 | mdev->devnode.parent = mdev->dev; | |
731 | mdev->devnode.release = media_device_release; | |
8a950796 JMC |
732 | |
733 | /* Set version 0 to indicate user-space that the graph is static */ | |
734 | mdev->topology_version = 0; | |
735 | ||
85de721c | 736 | ret = media_devnode_register(&mdev->devnode, owner); |
176fb0d1 LP |
737 | if (ret < 0) |
738 | return ret; | |
739 | ||
740 | ret = device_create_file(&mdev->devnode.dev, &dev_attr_model); | |
741 | if (ret < 0) { | |
742 | media_devnode_unregister(&mdev->devnode); | |
743 | return ret; | |
744 | } | |
745 | ||
8f5a3188 MCC |
746 | dev_dbg(mdev->dev, "Media device registered\n"); |
747 | ||
176fb0d1 LP |
748 | return 0; |
749 | } | |
85de721c | 750 | EXPORT_SYMBOL_GPL(__media_device_register); |
176fb0d1 | 751 | |
afcbdb55 SK |
752 | int __must_check media_device_register_entity_notify(struct media_device *mdev, |
753 | struct media_entity_notify *nptr) | |
754 | { | |
755 | spin_lock(&mdev->lock); | |
756 | list_add_tail(&nptr->list, &mdev->entity_notify); | |
757 | spin_unlock(&mdev->lock); | |
758 | return 0; | |
759 | } | |
760 | EXPORT_SYMBOL_GPL(media_device_register_entity_notify); | |
761 | ||
762 | /* | |
763 | * Note: Should be called with mdev->lock held. | |
764 | */ | |
765 | static void __media_device_unregister_entity_notify(struct media_device *mdev, | |
766 | struct media_entity_notify *nptr) | |
767 | { | |
768 | list_del(&nptr->list); | |
769 | } | |
770 | ||
771 | void media_device_unregister_entity_notify(struct media_device *mdev, | |
772 | struct media_entity_notify *nptr) | |
773 | { | |
774 | spin_lock(&mdev->lock); | |
775 | __media_device_unregister_entity_notify(mdev, nptr); | |
776 | spin_unlock(&mdev->lock); | |
777 | } | |
778 | EXPORT_SYMBOL_GPL(media_device_unregister_entity_notify); | |
779 | ||
176fb0d1 LP |
780 | void media_device_unregister(struct media_device *mdev) |
781 | { | |
53e269c1 LP |
782 | struct media_entity *entity; |
783 | struct media_entity *next; | |
d47109fa | 784 | struct media_interface *intf, *tmp_intf; |
afcbdb55 | 785 | struct media_entity_notify *notify, *nextp; |
d47109fa | 786 | |
821ed366 MCC |
787 | if (mdev == NULL) |
788 | return; | |
789 | ||
790 | spin_lock(&mdev->lock); | |
791 | ||
223d19c5 | 792 | /* Check if mdev was ever registered at all */ |
821ed366 MCC |
793 | if (!media_devnode_is_registered(&mdev->devnode)) { |
794 | spin_unlock(&mdev->lock); | |
223d19c5 | 795 | return; |
821ed366 | 796 | } |
223d19c5 | 797 | |
f50d5166 MCC |
798 | /* Remove all entities from the media device */ |
799 | list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list) | |
821ed366 | 800 | __media_device_unregister_entity(entity); |
f50d5166 | 801 | |
afcbdb55 SK |
802 | /* Remove all entity_notify callbacks from the media device */ |
803 | list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list) | |
804 | __media_device_unregister_entity_notify(mdev, notify); | |
805 | ||
d47109fa | 806 | /* Remove all interfaces from the media device */ |
d47109fa MCC |
807 | list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces, |
808 | graph_obj.list) { | |
809 | __media_remove_intf_links(intf); | |
c350ef83 | 810 | media_gobj_destroy(&intf->graph_obj); |
d47109fa MCC |
811 | kfree(intf); |
812 | } | |
821ed366 | 813 | |
d47109fa | 814 | spin_unlock(&mdev->lock); |
53e269c1 | 815 | |
176fb0d1 LP |
816 | device_remove_file(&mdev->devnode.dev, &dev_attr_model); |
817 | media_devnode_unregister(&mdev->devnode); | |
8f5a3188 MCC |
818 | |
819 | dev_dbg(mdev->dev, "Media device unregistered\n"); | |
176fb0d1 LP |
820 | } |
821 | EXPORT_SYMBOL_GPL(media_device_unregister); | |
53e269c1 | 822 | |
d062f911 SK |
823 | static void media_device_release_devres(struct device *dev, void *res) |
824 | { | |
825 | } | |
826 | ||
d062f911 SK |
827 | struct media_device *media_device_get_devres(struct device *dev) |
828 | { | |
829 | struct media_device *mdev; | |
830 | ||
831 | mdev = devres_find(dev, media_device_release_devres, NULL, NULL); | |
832 | if (mdev) | |
833 | return mdev; | |
834 | ||
835 | mdev = devres_alloc(media_device_release_devres, | |
836 | sizeof(struct media_device), GFP_KERNEL); | |
837 | if (!mdev) | |
838 | return NULL; | |
839 | return devres_get(dev, mdev, NULL, NULL); | |
840 | } | |
841 | EXPORT_SYMBOL_GPL(media_device_get_devres); | |
842 | ||
d062f911 SK |
843 | struct media_device *media_device_find_devres(struct device *dev) |
844 | { | |
845 | return devres_find(dev, media_device_release_devres, NULL, NULL); | |
846 | } | |
847 | EXPORT_SYMBOL_GPL(media_device_find_devres); | |
e576d60b | 848 | |
b34ecd5a | 849 | #if IS_ENABLED(CONFIG_PCI) |
6cf5dad1 MCC |
850 | void media_device_pci_init(struct media_device *mdev, |
851 | struct pci_dev *pci_dev, | |
852 | const char *name) | |
41b44e35 | 853 | { |
41b44e35 MCC |
854 | mdev->dev = &pci_dev->dev; |
855 | ||
856 | if (name) | |
857 | strlcpy(mdev->model, name, sizeof(mdev->model)); | |
858 | else | |
859 | strlcpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model)); | |
860 | ||
861 | sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev)); | |
862 | ||
863 | mdev->hw_revision = (pci_dev->subsystem_vendor << 16) | |
864 | | pci_dev->subsystem_device; | |
865 | ||
866 | mdev->driver_version = LINUX_VERSION_CODE; | |
867 | ||
868 | media_device_init(mdev); | |
41b44e35 MCC |
869 | } |
870 | EXPORT_SYMBOL_GPL(media_device_pci_init); | |
b34ecd5a | 871 | #endif |
41b44e35 | 872 | |
b34ecd5a | 873 | #if IS_ENABLED(CONFIG_USB) |
6cf5dad1 MCC |
874 | void __media_device_usb_init(struct media_device *mdev, |
875 | struct usb_device *udev, | |
876 | const char *board_name, | |
877 | const char *driver_name) | |
41b44e35 | 878 | { |
41b44e35 MCC |
879 | mdev->dev = &udev->dev; |
880 | ||
881 | if (driver_name) | |
882 | strlcpy(mdev->driver_name, driver_name, | |
883 | sizeof(mdev->driver_name)); | |
884 | ||
885 | if (board_name) | |
886 | strlcpy(mdev->model, board_name, sizeof(mdev->model)); | |
887 | else if (udev->product) | |
888 | strlcpy(mdev->model, udev->product, sizeof(mdev->model)); | |
889 | else | |
890 | strlcpy(mdev->model, "unknown model", sizeof(mdev->model)); | |
891 | if (udev->serial) | |
892 | strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial)); | |
893 | usb_make_path(udev, mdev->bus_info, sizeof(mdev->bus_info)); | |
894 | mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); | |
895 | mdev->driver_version = LINUX_VERSION_CODE; | |
896 | ||
897 | media_device_init(mdev); | |
41b44e35 MCC |
898 | } |
899 | EXPORT_SYMBOL_GPL(__media_device_usb_init); | |
b34ecd5a | 900 | #endif |
41b44e35 MCC |
901 | |
902 | ||
e576d60b | 903 | #endif /* CONFIG_MEDIA_CONTROLLER */ |