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 | ||
1651333b | 93 | media_device_for_each_entity(entity, mdev) { |
fa762394 MCC |
94 | if (((media_entity_id(entity) == id) && !next) || |
95 | ((media_entity_id(entity) > id) && next)) { | |
1651333b LP |
96 | return entity; |
97 | } | |
98 | } | |
99 | ||
1651333b LP |
100 | return NULL; |
101 | } | |
102 | ||
103 | static long media_device_enum_entities(struct media_device *mdev, | |
104 | struct media_entity_desc __user *uent) | |
105 | { | |
106 | struct media_entity *ent; | |
107 | struct media_entity_desc u_ent; | |
108 | ||
e6a62346 | 109 | memset(&u_ent, 0, sizeof(u_ent)); |
1651333b LP |
110 | if (copy_from_user(&u_ent.id, &uent->id, sizeof(u_ent.id))) |
111 | return -EFAULT; | |
112 | ||
113 | ent = find_entity(mdev, u_ent.id); | |
114 | ||
115 | if (ent == NULL) | |
116 | return -EINVAL; | |
117 | ||
fa762394 | 118 | u_ent.id = media_entity_id(ent); |
de8eae36 LP |
119 | if (ent->name) |
120 | strlcpy(u_ent.name, ent->name, sizeof(u_ent.name)); | |
0e576b76 | 121 | u_ent.type = ent->function; |
8ed8c88c | 122 | u_ent.revision = 0; /* Unused */ |
1651333b | 123 | u_ent.flags = ent->flags; |
8ed8c88c | 124 | u_ent.group_id = 0; /* Unused */ |
1651333b LP |
125 | u_ent.pads = ent->num_pads; |
126 | u_ent.links = ent->num_links - ent->num_backlinks; | |
b2cd2744 MCC |
127 | |
128 | /* | |
129 | * Workaround for a bug at media-ctl <= v1.10 that makes it to | |
130 | * do the wrong thing if the entity function doesn't belong to | |
131 | * either MEDIA_ENT_F_OLD_BASE or MEDIA_ENT_F_OLD_SUBDEV_BASE | |
132 | * Ranges. | |
133 | * | |
134 | * Non-subdevices are expected to be at the MEDIA_ENT_F_OLD_BASE, | |
135 | * or, otherwise, will be silently ignored by media-ctl when | |
136 | * printing the graphviz diagram. So, map them into the devnode | |
137 | * old range. | |
138 | */ | |
139 | if (ent->function < MEDIA_ENT_F_OLD_BASE || | |
140 | ent->function > MEDIA_ENT_T_DEVNODE_UNKNOWN) { | |
141 | if (is_media_entity_v4l2_subdev(ent)) | |
142 | u_ent.type = MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN; | |
143 | else if (ent->function != MEDIA_ENT_F_IO_V4L) | |
144 | u_ent.type = MEDIA_ENT_T_DEVNODE_UNKNOWN; | |
145 | } | |
146 | ||
fa5034c6 | 147 | memcpy(&u_ent.raw, &ent->info, sizeof(ent->info)); |
1651333b LP |
148 | if (copy_to_user(uent, &u_ent, sizeof(u_ent))) |
149 | return -EFAULT; | |
150 | return 0; | |
151 | } | |
152 | ||
153 | static void media_device_kpad_to_upad(const struct media_pad *kpad, | |
154 | struct media_pad_desc *upad) | |
155 | { | |
fa762394 | 156 | upad->entity = media_entity_id(kpad->entity); |
1651333b LP |
157 | upad->index = kpad->index; |
158 | upad->flags = kpad->flags; | |
159 | } | |
160 | ||
b0a1f2a8 SA |
161 | static long __media_device_enum_links(struct media_device *mdev, |
162 | struct media_links_enum *links) | |
1651333b LP |
163 | { |
164 | struct media_entity *entity; | |
1651333b | 165 | |
b0a1f2a8 | 166 | entity = find_entity(mdev, links->entity); |
1651333b LP |
167 | if (entity == NULL) |
168 | return -EINVAL; | |
169 | ||
b0a1f2a8 | 170 | if (links->pads) { |
1651333b LP |
171 | unsigned int p; |
172 | ||
173 | for (p = 0; p < entity->num_pads; p++) { | |
174 | struct media_pad_desc pad; | |
c88e739b DC |
175 | |
176 | memset(&pad, 0, sizeof(pad)); | |
1651333b | 177 | media_device_kpad_to_upad(&entity->pads[p], &pad); |
b0a1f2a8 | 178 | if (copy_to_user(&links->pads[p], &pad, sizeof(pad))) |
1651333b LP |
179 | return -EFAULT; |
180 | } | |
181 | } | |
182 | ||
b0a1f2a8 | 183 | if (links->links) { |
b83e2508 MCC |
184 | struct media_link *link; |
185 | struct media_link_desc __user *ulink_desc = links->links; | |
1651333b | 186 | |
b83e2508 MCC |
187 | list_for_each_entry(link, &entity->links, list) { |
188 | struct media_link_desc klink_desc; | |
1651333b LP |
189 | |
190 | /* Ignore backlinks. */ | |
b83e2508 | 191 | if (link->source->entity != entity) |
1651333b | 192 | continue; |
b83e2508 MCC |
193 | memset(&klink_desc, 0, sizeof(klink_desc)); |
194 | media_device_kpad_to_upad(link->source, | |
195 | &klink_desc.source); | |
196 | media_device_kpad_to_upad(link->sink, | |
197 | &klink_desc.sink); | |
198 | klink_desc.flags = link->flags; | |
199 | if (copy_to_user(ulink_desc, &klink_desc, | |
200 | sizeof(*ulink_desc))) | |
1651333b | 201 | return -EFAULT; |
b83e2508 | 202 | ulink_desc++; |
1651333b LP |
203 | } |
204 | } | |
b0a1f2a8 SA |
205 | |
206 | return 0; | |
207 | } | |
208 | ||
209 | static long media_device_enum_links(struct media_device *mdev, | |
210 | struct media_links_enum __user *ulinks) | |
211 | { | |
212 | struct media_links_enum links; | |
213 | int rval; | |
214 | ||
215 | if (copy_from_user(&links, ulinks, sizeof(links))) | |
216 | return -EFAULT; | |
217 | ||
218 | rval = __media_device_enum_links(mdev, &links); | |
219 | if (rval < 0) | |
220 | return rval; | |
221 | ||
1651333b LP |
222 | if (copy_to_user(ulinks, &links, sizeof(*ulinks))) |
223 | return -EFAULT; | |
b0a1f2a8 | 224 | |
1651333b LP |
225 | return 0; |
226 | } | |
227 | ||
97548ed4 LP |
228 | static long media_device_setup_link(struct media_device *mdev, |
229 | struct media_link_desc __user *_ulink) | |
230 | { | |
231 | struct media_link *link = NULL; | |
232 | struct media_link_desc ulink; | |
233 | struct media_entity *source; | |
234 | struct media_entity *sink; | |
235 | int ret; | |
236 | ||
237 | if (copy_from_user(&ulink, _ulink, sizeof(ulink))) | |
238 | return -EFAULT; | |
239 | ||
240 | /* Find the source and sink entities and link. | |
241 | */ | |
242 | source = find_entity(mdev, ulink.source.entity); | |
243 | sink = find_entity(mdev, ulink.sink.entity); | |
244 | ||
245 | if (source == NULL || sink == NULL) | |
246 | return -EINVAL; | |
247 | ||
248 | if (ulink.source.index >= source->num_pads || | |
249 | ulink.sink.index >= sink->num_pads) | |
250 | return -EINVAL; | |
251 | ||
252 | link = media_entity_find_link(&source->pads[ulink.source.index], | |
253 | &sink->pads[ulink.sink.index]); | |
254 | if (link == NULL) | |
255 | return -EINVAL; | |
256 | ||
257 | /* Setup the link on both entities. */ | |
258 | ret = __media_entity_setup_link(link, ulink.flags); | |
259 | ||
260 | if (copy_to_user(_ulink, &ulink, sizeof(ulink))) | |
261 | return -EFAULT; | |
262 | ||
263 | return ret; | |
264 | } | |
265 | ||
8309f47c MCC |
266 | static long __media_device_get_topology(struct media_device *mdev, |
267 | struct media_v2_topology *topo) | |
268 | { | |
269 | struct media_entity *entity; | |
270 | struct media_interface *intf; | |
271 | struct media_pad *pad; | |
272 | struct media_link *link; | |
d37410c2 SA |
273 | struct media_v2_entity kentity, __user *uentity; |
274 | struct media_v2_interface kintf, __user *uintf; | |
275 | struct media_v2_pad kpad, __user *upad; | |
276 | struct media_v2_link klink, __user *ulink; | |
9033b1a4 MCC |
277 | unsigned int i; |
278 | int ret = 0; | |
8309f47c MCC |
279 | |
280 | topo->topology_version = mdev->topology_version; | |
281 | ||
282 | /* Get entities and number of entities */ | |
283 | i = 0; | |
b3b7a9f1 | 284 | uentity = media_get_uptr(topo->ptr_entities); |
8309f47c MCC |
285 | media_device_for_each_entity(entity, mdev) { |
286 | i++; | |
b3b7a9f1 | 287 | if (ret || !uentity) |
8309f47c MCC |
288 | continue; |
289 | ||
290 | if (i > topo->num_entities) { | |
291 | ret = -ENOSPC; | |
292 | continue; | |
293 | } | |
294 | ||
295 | /* Copy fields to userspace struct if not error */ | |
b3b7a9f1 MCC |
296 | memset(&kentity, 0, sizeof(kentity)); |
297 | kentity.id = entity->graph_obj.id; | |
298 | kentity.function = entity->function; | |
299 | strncpy(kentity.name, entity->name, | |
300 | sizeof(kentity.name)); | |
8309f47c | 301 | |
b3b7a9f1 | 302 | if (copy_to_user(uentity, &kentity, sizeof(kentity))) |
8309f47c | 303 | ret = -EFAULT; |
b3b7a9f1 | 304 | uentity++; |
8309f47c MCC |
305 | } |
306 | topo->num_entities = i; | |
307 | ||
308 | /* Get interfaces and number of interfaces */ | |
309 | i = 0; | |
b3b7a9f1 | 310 | uintf = media_get_uptr(topo->ptr_interfaces); |
8309f47c MCC |
311 | media_device_for_each_intf(intf, mdev) { |
312 | i++; | |
b3b7a9f1 | 313 | if (ret || !uintf) |
8309f47c MCC |
314 | continue; |
315 | ||
316 | if (i > topo->num_interfaces) { | |
317 | ret = -ENOSPC; | |
318 | continue; | |
319 | } | |
320 | ||
b3b7a9f1 | 321 | memset(&kintf, 0, sizeof(kintf)); |
8309f47c MCC |
322 | |
323 | /* Copy intf fields to userspace struct */ | |
b3b7a9f1 MCC |
324 | kintf.id = intf->graph_obj.id; |
325 | kintf.intf_type = intf->type; | |
326 | kintf.flags = intf->flags; | |
8309f47c MCC |
327 | |
328 | if (media_type(&intf->graph_obj) == MEDIA_GRAPH_INTF_DEVNODE) { | |
329 | struct media_intf_devnode *devnode; | |
330 | ||
331 | devnode = intf_to_devnode(intf); | |
332 | ||
b3b7a9f1 MCC |
333 | kintf.devnode.major = devnode->major; |
334 | kintf.devnode.minor = devnode->minor; | |
8309f47c MCC |
335 | } |
336 | ||
b3b7a9f1 | 337 | if (copy_to_user(uintf, &kintf, sizeof(kintf))) |
8309f47c | 338 | ret = -EFAULT; |
b3b7a9f1 | 339 | uintf++; |
8309f47c MCC |
340 | } |
341 | topo->num_interfaces = i; | |
342 | ||
343 | /* Get pads and number of pads */ | |
344 | i = 0; | |
b3b7a9f1 | 345 | upad = media_get_uptr(topo->ptr_pads); |
8309f47c MCC |
346 | media_device_for_each_pad(pad, mdev) { |
347 | i++; | |
b3b7a9f1 | 348 | if (ret || !upad) |
8309f47c MCC |
349 | continue; |
350 | ||
351 | if (i > topo->num_pads) { | |
352 | ret = -ENOSPC; | |
353 | continue; | |
354 | } | |
355 | ||
b3b7a9f1 | 356 | memset(&kpad, 0, sizeof(kpad)); |
8309f47c MCC |
357 | |
358 | /* Copy pad fields to userspace struct */ | |
b3b7a9f1 MCC |
359 | kpad.id = pad->graph_obj.id; |
360 | kpad.entity_id = pad->entity->graph_obj.id; | |
361 | kpad.flags = pad->flags; | |
8309f47c | 362 | |
b3b7a9f1 | 363 | if (copy_to_user(upad, &kpad, sizeof(kpad))) |
8309f47c | 364 | ret = -EFAULT; |
b3b7a9f1 | 365 | upad++; |
8309f47c MCC |
366 | } |
367 | topo->num_pads = i; | |
368 | ||
369 | /* Get links and number of links */ | |
370 | i = 0; | |
b3b7a9f1 | 371 | ulink = media_get_uptr(topo->ptr_links); |
8309f47c | 372 | media_device_for_each_link(link, mdev) { |
39d1ebc6 MCC |
373 | if (link->is_backlink) |
374 | continue; | |
375 | ||
8309f47c MCC |
376 | i++; |
377 | ||
b3b7a9f1 | 378 | if (ret || !ulink) |
8309f47c MCC |
379 | continue; |
380 | ||
381 | if (i > topo->num_links) { | |
382 | ret = -ENOSPC; | |
383 | continue; | |
384 | } | |
385 | ||
b3b7a9f1 | 386 | memset(&klink, 0, sizeof(klink)); |
8309f47c MCC |
387 | |
388 | /* Copy link fields to userspace struct */ | |
b3b7a9f1 MCC |
389 | klink.id = link->graph_obj.id; |
390 | klink.source_id = link->gobj0->id; | |
391 | klink.sink_id = link->gobj1->id; | |
392 | klink.flags = link->flags; | |
8309f47c | 393 | |
b3b7a9f1 | 394 | if (copy_to_user(ulink, &klink, sizeof(klink))) |
8309f47c | 395 | ret = -EFAULT; |
b3b7a9f1 | 396 | ulink++; |
8309f47c MCC |
397 | } |
398 | topo->num_links = i; | |
399 | ||
400 | return ret; | |
401 | } | |
402 | ||
403 | static long media_device_get_topology(struct media_device *mdev, | |
404 | struct media_v2_topology __user *utopo) | |
405 | { | |
406 | struct media_v2_topology ktopo; | |
407 | int ret; | |
408 | ||
a5c82e56 DC |
409 | if (copy_from_user(&ktopo, utopo, sizeof(ktopo))) |
410 | return -EFAULT; | |
8309f47c MCC |
411 | |
412 | ret = __media_device_get_topology(mdev, &ktopo); | |
413 | if (ret < 0) | |
414 | return ret; | |
415 | ||
a5c82e56 DC |
416 | if (copy_to_user(utopo, &ktopo, sizeof(*utopo))) |
417 | return -EFAULT; | |
8309f47c | 418 | |
a5c82e56 | 419 | return 0; |
8309f47c MCC |
420 | } |
421 | ||
140d8816 LP |
422 | static long media_device_ioctl(struct file *filp, unsigned int cmd, |
423 | unsigned long arg) | |
424 | { | |
425 | struct media_devnode *devnode = media_devnode_data(filp); | |
426 | struct media_device *dev = to_media_device(devnode); | |
427 | long ret; | |
428 | ||
e2c91d4d | 429 | mutex_lock(&dev->graph_mutex); |
140d8816 LP |
430 | switch (cmd) { |
431 | case MEDIA_IOC_DEVICE_INFO: | |
432 | ret = media_device_get_info(dev, | |
433 | (struct media_device_info __user *)arg); | |
434 | break; | |
435 | ||
1651333b LP |
436 | case MEDIA_IOC_ENUM_ENTITIES: |
437 | ret = media_device_enum_entities(dev, | |
438 | (struct media_entity_desc __user *)arg); | |
439 | break; | |
440 | ||
441 | case MEDIA_IOC_ENUM_LINKS: | |
1651333b LP |
442 | ret = media_device_enum_links(dev, |
443 | (struct media_links_enum __user *)arg); | |
1651333b LP |
444 | break; |
445 | ||
97548ed4 | 446 | case MEDIA_IOC_SETUP_LINK: |
97548ed4 LP |
447 | ret = media_device_setup_link(dev, |
448 | (struct media_link_desc __user *)arg); | |
97548ed4 LP |
449 | break; |
450 | ||
8309f47c | 451 | case MEDIA_IOC_G_TOPOLOGY: |
8309f47c MCC |
452 | ret = media_device_get_topology(dev, |
453 | (struct media_v2_topology __user *)arg); | |
8309f47c | 454 | break; |
333a6515 | 455 | |
140d8816 LP |
456 | default: |
457 | ret = -ENOIOCTLCMD; | |
458 | } | |
e2c91d4d | 459 | mutex_unlock(&dev->graph_mutex); |
140d8816 LP |
460 | |
461 | return ret; | |
462 | } | |
463 | ||
b0a1f2a8 SA |
464 | #ifdef CONFIG_COMPAT |
465 | ||
466 | struct media_links_enum32 { | |
467 | __u32 entity; | |
468 | compat_uptr_t pads; /* struct media_pad_desc * */ | |
469 | compat_uptr_t links; /* struct media_link_desc * */ | |
470 | __u32 reserved[4]; | |
471 | }; | |
472 | ||
473 | static long media_device_enum_links32(struct media_device *mdev, | |
474 | struct media_links_enum32 __user *ulinks) | |
475 | { | |
476 | struct media_links_enum links; | |
477 | compat_uptr_t pads_ptr, links_ptr; | |
478 | ||
479 | memset(&links, 0, sizeof(links)); | |
480 | ||
481 | if (get_user(links.entity, &ulinks->entity) | |
482 | || get_user(pads_ptr, &ulinks->pads) | |
483 | || get_user(links_ptr, &ulinks->links)) | |
484 | return -EFAULT; | |
485 | ||
486 | links.pads = compat_ptr(pads_ptr); | |
487 | links.links = compat_ptr(links_ptr); | |
488 | ||
489 | return __media_device_enum_links(mdev, &links); | |
490 | } | |
491 | ||
492 | #define MEDIA_IOC_ENUM_LINKS32 _IOWR('|', 0x02, struct media_links_enum32) | |
493 | ||
494 | static long media_device_compat_ioctl(struct file *filp, unsigned int cmd, | |
495 | unsigned long arg) | |
496 | { | |
497 | struct media_devnode *devnode = media_devnode_data(filp); | |
498 | struct media_device *dev = to_media_device(devnode); | |
499 | long ret; | |
500 | ||
501 | switch (cmd) { | |
b0a1f2a8 SA |
502 | case MEDIA_IOC_ENUM_LINKS32: |
503 | mutex_lock(&dev->graph_mutex); | |
504 | ret = media_device_enum_links32(dev, | |
505 | (struct media_links_enum32 __user *)arg); | |
506 | mutex_unlock(&dev->graph_mutex); | |
507 | break; | |
508 | ||
509 | default: | |
f7369627 | 510 | return media_device_ioctl(filp, cmd, arg); |
b0a1f2a8 SA |
511 | } |
512 | ||
513 | return ret; | |
514 | } | |
515 | #endif /* CONFIG_COMPAT */ | |
516 | ||
176fb0d1 LP |
517 | static const struct media_file_operations media_device_fops = { |
518 | .owner = THIS_MODULE, | |
140d8816 LP |
519 | .open = media_device_open, |
520 | .ioctl = media_device_ioctl, | |
b0a1f2a8 SA |
521 | #ifdef CONFIG_COMPAT |
522 | .compat_ioctl = media_device_compat_ioctl, | |
523 | #endif /* CONFIG_COMPAT */ | |
140d8816 | 524 | .release = media_device_close, |
176fb0d1 LP |
525 | }; |
526 | ||
527 | /* ----------------------------------------------------------------------------- | |
528 | * sysfs | |
529 | */ | |
530 | ||
531 | static ssize_t show_model(struct device *cd, | |
532 | struct device_attribute *attr, char *buf) | |
533 | { | |
534 | struct media_device *mdev = to_media_device(to_media_devnode(cd)); | |
535 | ||
536 | return sprintf(buf, "%.*s\n", (int)sizeof(mdev->model), mdev->model); | |
537 | } | |
538 | ||
539 | static DEVICE_ATTR(model, S_IRUGO, show_model, NULL); | |
540 | ||
541 | /* ----------------------------------------------------------------------------- | |
542 | * Registration/unregistration | |
543 | */ | |
544 | ||
545 | static void media_device_release(struct media_devnode *mdev) | |
546 | { | |
8f5a3188 | 547 | dev_dbg(mdev->parent, "Media device released\n"); |
176fb0d1 LP |
548 | } |
549 | ||
b2ed8af9 MCC |
550 | /** |
551 | * media_device_register_entity - Register an entity with a media device | |
552 | * @mdev: The media device | |
553 | * @entity: The entity | |
554 | */ | |
555 | int __must_check media_device_register_entity(struct media_device *mdev, | |
556 | struct media_entity *entity) | |
557 | { | |
afcbdb55 | 558 | struct media_entity_notify *notify, *next; |
b2ed8af9 | 559 | unsigned int i; |
ba0dd729 | 560 | int ret; |
b2ed8af9 MCC |
561 | |
562 | if (entity->function == MEDIA_ENT_F_V4L2_SUBDEV_UNKNOWN || | |
563 | entity->function == MEDIA_ENT_F_UNKNOWN) | |
564 | dev_warn(mdev->dev, | |
565 | "Entity type for entity %s was not initialized!\n", | |
566 | entity->name); | |
567 | ||
568 | /* Warn if we apparently re-register an entity */ | |
569 | WARN_ON(entity->graph_obj.mdev != NULL); | |
570 | entity->graph_obj.mdev = mdev; | |
571 | INIT_LIST_HEAD(&entity->links); | |
572 | entity->num_links = 0; | |
573 | entity->num_backlinks = 0; | |
574 | ||
ba0dd729 MCC |
575 | if (!ida_pre_get(&mdev->entity_internal_idx, GFP_KERNEL)) |
576 | return -ENOMEM; | |
577 | ||
e2c91d4d | 578 | mutex_lock(&mdev->graph_mutex); |
665faa97 | 579 | |
ba0dd729 MCC |
580 | ret = ida_get_new_above(&mdev->entity_internal_idx, 1, |
581 | &entity->internal_idx); | |
582 | if (ret < 0) { | |
e2c91d4d | 583 | mutex_unlock(&mdev->graph_mutex); |
ba0dd729 | 584 | return ret; |
665faa97 SA |
585 | } |
586 | ||
587 | mdev->entity_internal_idx_max = | |
588 | max(mdev->entity_internal_idx_max, entity->internal_idx); | |
589 | ||
b2ed8af9 MCC |
590 | /* Initialize media_gobj embedded at the entity */ |
591 | media_gobj_create(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj); | |
592 | ||
593 | /* Initialize objects at the pads */ | |
594 | for (i = 0; i < entity->num_pads; i++) | |
595 | media_gobj_create(mdev, MEDIA_GRAPH_PAD, | |
596 | &entity->pads[i].graph_obj); | |
597 | ||
afcbdb55 SK |
598 | /* invoke entity_notify callbacks */ |
599 | list_for_each_entry_safe(notify, next, &mdev->entity_notify, list) { | |
600 | (notify)->notify(entity, notify->notify_data); | |
601 | } | |
602 | ||
0c426c47 SA |
603 | if (mdev->entity_internal_idx_max |
604 | >= mdev->pm_count_walk.ent_enum.idx_max) { | |
605 | struct media_entity_graph new = { .top = 0 }; | |
606 | ||
607 | /* | |
608 | * Initialise the new graph walk before cleaning up | |
609 | * the old one in order not to spoil the graph walk | |
610 | * object of the media device if graph walk init fails. | |
611 | */ | |
612 | ret = media_entity_graph_walk_init(&new, mdev); | |
613 | if (ret) { | |
614 | mutex_unlock(&mdev->graph_mutex); | |
615 | return ret; | |
616 | } | |
617 | media_entity_graph_walk_cleanup(&mdev->pm_count_walk); | |
618 | mdev->pm_count_walk = new; | |
619 | } | |
620 | mutex_unlock(&mdev->graph_mutex); | |
621 | ||
b2ed8af9 MCC |
622 | return 0; |
623 | } | |
624 | EXPORT_SYMBOL_GPL(media_device_register_entity); | |
625 | ||
821ed366 | 626 | static void __media_device_unregister_entity(struct media_entity *entity) |
b2ed8af9 MCC |
627 | { |
628 | struct media_device *mdev = entity->graph_obj.mdev; | |
629 | struct media_link *link, *tmp; | |
630 | struct media_interface *intf; | |
631 | unsigned int i; | |
632 | ||
665faa97 SA |
633 | ida_simple_remove(&mdev->entity_internal_idx, entity->internal_idx); |
634 | ||
b2ed8af9 MCC |
635 | /* Remove all interface links pointing to this entity */ |
636 | list_for_each_entry(intf, &mdev->interfaces, graph_obj.list) { | |
637 | list_for_each_entry_safe(link, tmp, &intf->links, list) { | |
638 | if (link->entity == entity) | |
639 | __media_remove_intf_link(link); | |
640 | } | |
641 | } | |
642 | ||
643 | /* Remove all data links that belong to this entity */ | |
644 | __media_entity_remove_links(entity); | |
645 | ||
646 | /* Remove all pads that belong to this entity */ | |
647 | for (i = 0; i < entity->num_pads; i++) | |
648 | media_gobj_destroy(&entity->pads[i].graph_obj); | |
649 | ||
650 | /* Remove the entity */ | |
651 | media_gobj_destroy(&entity->graph_obj); | |
652 | ||
afcbdb55 SK |
653 | /* invoke entity_notify callbacks to handle entity removal?? */ |
654 | ||
b2ed8af9 MCC |
655 | entity->graph_obj.mdev = NULL; |
656 | } | |
821ed366 MCC |
657 | |
658 | void media_device_unregister_entity(struct media_entity *entity) | |
659 | { | |
660 | struct media_device *mdev = entity->graph_obj.mdev; | |
661 | ||
662 | if (mdev == NULL) | |
663 | return; | |
664 | ||
e2c91d4d | 665 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 666 | __media_device_unregister_entity(entity); |
e2c91d4d | 667 | mutex_unlock(&mdev->graph_mutex); |
821ed366 | 668 | } |
b2ed8af9 MCC |
669 | EXPORT_SYMBOL_GPL(media_device_unregister_entity); |
670 | ||
176fb0d1 | 671 | /** |
9832e155 | 672 | * media_device_init() - initialize a media device |
176fb0d1 LP |
673 | * @mdev: The media device |
674 | * | |
675 | * The caller is responsible for initializing the media device before | |
676 | * registration. The following fields must be set: | |
677 | * | |
678 | * - dev must point to the parent device | |
679 | * - model must be filled with the device model name | |
680 | */ | |
9832e155 | 681 | void media_device_init(struct media_device *mdev) |
176fb0d1 | 682 | { |
53e269c1 | 683 | INIT_LIST_HEAD(&mdev->entities); |
57cf79b7 | 684 | INIT_LIST_HEAD(&mdev->interfaces); |
9155d859 MCC |
685 | INIT_LIST_HEAD(&mdev->pads); |
686 | INIT_LIST_HEAD(&mdev->links); | |
afcbdb55 | 687 | INIT_LIST_HEAD(&mdev->entity_notify); |
503c3d82 | 688 | mutex_init(&mdev->graph_mutex); |
665faa97 | 689 | ida_init(&mdev->entity_internal_idx); |
53e269c1 | 690 | |
9832e155 JMC |
691 | dev_dbg(mdev->dev, "Media device initialized\n"); |
692 | } | |
693 | EXPORT_SYMBOL_GPL(media_device_init); | |
694 | ||
9832e155 JMC |
695 | void media_device_cleanup(struct media_device *mdev) |
696 | { | |
665faa97 SA |
697 | ida_destroy(&mdev->entity_internal_idx); |
698 | mdev->entity_internal_idx_max = 0; | |
0c426c47 | 699 | media_entity_graph_walk_cleanup(&mdev->pm_count_walk); |
9832e155 JMC |
700 | mutex_destroy(&mdev->graph_mutex); |
701 | } | |
702 | EXPORT_SYMBOL_GPL(media_device_cleanup); | |
703 | ||
9832e155 JMC |
704 | int __must_check __media_device_register(struct media_device *mdev, |
705 | struct module *owner) | |
706 | { | |
707 | int ret; | |
708 | ||
176fb0d1 LP |
709 | /* Register the device node. */ |
710 | mdev->devnode.fops = &media_device_fops; | |
711 | mdev->devnode.parent = mdev->dev; | |
712 | mdev->devnode.release = media_device_release; | |
8a950796 JMC |
713 | |
714 | /* Set version 0 to indicate user-space that the graph is static */ | |
715 | mdev->topology_version = 0; | |
716 | ||
85de721c | 717 | ret = media_devnode_register(&mdev->devnode, owner); |
176fb0d1 LP |
718 | if (ret < 0) |
719 | return ret; | |
720 | ||
721 | ret = device_create_file(&mdev->devnode.dev, &dev_attr_model); | |
722 | if (ret < 0) { | |
723 | media_devnode_unregister(&mdev->devnode); | |
724 | return ret; | |
725 | } | |
726 | ||
8f5a3188 MCC |
727 | dev_dbg(mdev->dev, "Media device registered\n"); |
728 | ||
176fb0d1 LP |
729 | return 0; |
730 | } | |
85de721c | 731 | EXPORT_SYMBOL_GPL(__media_device_register); |
176fb0d1 | 732 | |
afcbdb55 SK |
733 | int __must_check media_device_register_entity_notify(struct media_device *mdev, |
734 | struct media_entity_notify *nptr) | |
735 | { | |
e2c91d4d | 736 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 737 | list_add_tail(&nptr->list, &mdev->entity_notify); |
e2c91d4d | 738 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
739 | return 0; |
740 | } | |
741 | EXPORT_SYMBOL_GPL(media_device_register_entity_notify); | |
742 | ||
743 | /* | |
744 | * Note: Should be called with mdev->lock held. | |
745 | */ | |
746 | static void __media_device_unregister_entity_notify(struct media_device *mdev, | |
747 | struct media_entity_notify *nptr) | |
748 | { | |
749 | list_del(&nptr->list); | |
750 | } | |
751 | ||
752 | void media_device_unregister_entity_notify(struct media_device *mdev, | |
753 | struct media_entity_notify *nptr) | |
754 | { | |
e2c91d4d | 755 | mutex_lock(&mdev->graph_mutex); |
afcbdb55 | 756 | __media_device_unregister_entity_notify(mdev, nptr); |
e2c91d4d | 757 | mutex_unlock(&mdev->graph_mutex); |
afcbdb55 SK |
758 | } |
759 | EXPORT_SYMBOL_GPL(media_device_unregister_entity_notify); | |
760 | ||
176fb0d1 LP |
761 | void media_device_unregister(struct media_device *mdev) |
762 | { | |
53e269c1 LP |
763 | struct media_entity *entity; |
764 | struct media_entity *next; | |
d47109fa | 765 | struct media_interface *intf, *tmp_intf; |
afcbdb55 | 766 | struct media_entity_notify *notify, *nextp; |
d47109fa | 767 | |
821ed366 MCC |
768 | if (mdev == NULL) |
769 | return; | |
770 | ||
e2c91d4d | 771 | mutex_lock(&mdev->graph_mutex); |
821ed366 | 772 | |
223d19c5 | 773 | /* Check if mdev was ever registered at all */ |
821ed366 | 774 | if (!media_devnode_is_registered(&mdev->devnode)) { |
e2c91d4d | 775 | mutex_unlock(&mdev->graph_mutex); |
223d19c5 | 776 | return; |
821ed366 | 777 | } |
223d19c5 | 778 | |
f50d5166 MCC |
779 | /* Remove all entities from the media device */ |
780 | list_for_each_entry_safe(entity, next, &mdev->entities, graph_obj.list) | |
821ed366 | 781 | __media_device_unregister_entity(entity); |
f50d5166 | 782 | |
afcbdb55 SK |
783 | /* Remove all entity_notify callbacks from the media device */ |
784 | list_for_each_entry_safe(notify, nextp, &mdev->entity_notify, list) | |
785 | __media_device_unregister_entity_notify(mdev, notify); | |
786 | ||
d47109fa | 787 | /* Remove all interfaces from the media device */ |
d47109fa MCC |
788 | list_for_each_entry_safe(intf, tmp_intf, &mdev->interfaces, |
789 | graph_obj.list) { | |
790 | __media_remove_intf_links(intf); | |
c350ef83 | 791 | media_gobj_destroy(&intf->graph_obj); |
d47109fa MCC |
792 | kfree(intf); |
793 | } | |
821ed366 | 794 | |
e2c91d4d | 795 | mutex_unlock(&mdev->graph_mutex); |
53e269c1 | 796 | |
176fb0d1 | 797 | device_remove_file(&mdev->devnode.dev, &dev_attr_model); |
c56d34a7 | 798 | dev_dbg(mdev->dev, "Media device unregistering\n"); |
176fb0d1 LP |
799 | media_devnode_unregister(&mdev->devnode); |
800 | } | |
801 | EXPORT_SYMBOL_GPL(media_device_unregister); | |
53e269c1 | 802 | |
d062f911 SK |
803 | static void media_device_release_devres(struct device *dev, void *res) |
804 | { | |
805 | } | |
806 | ||
d062f911 SK |
807 | struct media_device *media_device_get_devres(struct device *dev) |
808 | { | |
809 | struct media_device *mdev; | |
810 | ||
811 | mdev = devres_find(dev, media_device_release_devres, NULL, NULL); | |
812 | if (mdev) | |
813 | return mdev; | |
814 | ||
815 | mdev = devres_alloc(media_device_release_devres, | |
816 | sizeof(struct media_device), GFP_KERNEL); | |
817 | if (!mdev) | |
818 | return NULL; | |
819 | return devres_get(dev, mdev, NULL, NULL); | |
820 | } | |
821 | EXPORT_SYMBOL_GPL(media_device_get_devres); | |
822 | ||
d062f911 SK |
823 | struct media_device *media_device_find_devres(struct device *dev) |
824 | { | |
825 | return devres_find(dev, media_device_release_devres, NULL, NULL); | |
826 | } | |
827 | EXPORT_SYMBOL_GPL(media_device_find_devres); | |
e576d60b | 828 | |
b34ecd5a | 829 | #if IS_ENABLED(CONFIG_PCI) |
6cf5dad1 MCC |
830 | void media_device_pci_init(struct media_device *mdev, |
831 | struct pci_dev *pci_dev, | |
832 | const char *name) | |
41b44e35 | 833 | { |
41b44e35 MCC |
834 | mdev->dev = &pci_dev->dev; |
835 | ||
836 | if (name) | |
837 | strlcpy(mdev->model, name, sizeof(mdev->model)); | |
838 | else | |
839 | strlcpy(mdev->model, pci_name(pci_dev), sizeof(mdev->model)); | |
840 | ||
841 | sprintf(mdev->bus_info, "PCI:%s", pci_name(pci_dev)); | |
842 | ||
843 | mdev->hw_revision = (pci_dev->subsystem_vendor << 16) | |
844 | | pci_dev->subsystem_device; | |
845 | ||
846 | mdev->driver_version = LINUX_VERSION_CODE; | |
847 | ||
848 | media_device_init(mdev); | |
41b44e35 MCC |
849 | } |
850 | EXPORT_SYMBOL_GPL(media_device_pci_init); | |
b34ecd5a | 851 | #endif |
41b44e35 | 852 | |
b34ecd5a | 853 | #if IS_ENABLED(CONFIG_USB) |
6cf5dad1 MCC |
854 | void __media_device_usb_init(struct media_device *mdev, |
855 | struct usb_device *udev, | |
856 | const char *board_name, | |
857 | const char *driver_name) | |
41b44e35 | 858 | { |
41b44e35 MCC |
859 | mdev->dev = &udev->dev; |
860 | ||
861 | if (driver_name) | |
862 | strlcpy(mdev->driver_name, driver_name, | |
863 | sizeof(mdev->driver_name)); | |
864 | ||
865 | if (board_name) | |
866 | strlcpy(mdev->model, board_name, sizeof(mdev->model)); | |
867 | else if (udev->product) | |
868 | strlcpy(mdev->model, udev->product, sizeof(mdev->model)); | |
869 | else | |
870 | strlcpy(mdev->model, "unknown model", sizeof(mdev->model)); | |
871 | if (udev->serial) | |
872 | strlcpy(mdev->serial, udev->serial, sizeof(mdev->serial)); | |
873 | usb_make_path(udev, mdev->bus_info, sizeof(mdev->bus_info)); | |
874 | mdev->hw_revision = le16_to_cpu(udev->descriptor.bcdDevice); | |
875 | mdev->driver_version = LINUX_VERSION_CODE; | |
876 | ||
877 | media_device_init(mdev); | |
41b44e35 MCC |
878 | } |
879 | EXPORT_SYMBOL_GPL(__media_device_usb_init); | |
b34ecd5a | 880 | #endif |
41b44e35 MCC |
881 | |
882 | ||
e576d60b | 883 | #endif /* CONFIG_MEDIA_CONTROLLER */ |