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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * dvbdev.c | |
3 | * | |
4 | * Copyright (C) 2000 Ralph Metzler <ralph@convergence.de> | |
5 | * & Marcus Metzler <marcus@convergence.de> | |
6 | * for convergence integrated media GmbH | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public License | |
10 | * as published by the Free Software Foundation; either version 2.1 | |
11 | * of the License, or (at your option) any later version. | |
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 | * | |
1da177e4 LT |
18 | */ |
19 | ||
b3ad24d2 MCC |
20 | #define pr_fmt(fmt) "dvbdev: " fmt |
21 | ||
1da177e4 LT |
22 | #include <linux/types.h> |
23 | #include <linux/errno.h> | |
24 | #include <linux/string.h> | |
25 | #include <linux/module.h> | |
1da177e4 | 26 | #include <linux/kernel.h> |
1da177e4 LT |
27 | #include <linux/init.h> |
28 | #include <linux/slab.h> | |
29 | #include <linux/device.h> | |
30 | #include <linux/fs.h> | |
31 | #include <linux/cdev.h> | |
1e4baed3 | 32 | #include <linux/mutex.h> |
1da177e4 LT |
33 | #include "dvbdev.h" |
34 | ||
188d2d55 MCC |
35 | /* Due to enum tuner_pad_index */ |
36 | #include <media/tuner.h> | |
37 | ||
72024f1e | 38 | static DEFINE_MUTEX(dvbdev_mutex); |
1da177e4 LT |
39 | static int dvbdev_debug; |
40 | ||
41 | module_param(dvbdev_debug, int, 0644); | |
42 | MODULE_PARM_DESC(dvbdev_debug, "Turn on/off device debugging (default:off)."); | |
43 | ||
b3ad24d2 MCC |
44 | #define dprintk(fmt, arg...) do { \ |
45 | if (dvbdev_debug) \ | |
46 | printk(KERN_DEBUG pr_fmt("%s: " fmt), \ | |
47 | __func__, ##arg); \ | |
48 | } while (0) | |
1da177e4 LT |
49 | |
50 | static LIST_HEAD(dvb_adapter_list); | |
1e4baed3 | 51 | static DEFINE_MUTEX(dvbdev_register_lock); |
1da177e4 LT |
52 | |
53 | static const char * const dnames[] = { | |
afd1a0c9 | 54 | "video", "audio", "sec", "frontend", "demux", "dvr", "ca", |
1da177e4 LT |
55 | "net", "osd" |
56 | }; | |
57 | ||
5dd3f307 AO |
58 | #ifdef CONFIG_DVB_DYNAMIC_MINORS |
59 | #define MAX_DVB_MINORS 256 | |
60 | #define DVB_MAX_IDS MAX_DVB_MINORS | |
61 | #else | |
1da177e4 | 62 | #define DVB_MAX_IDS 4 |
0ede1876 | 63 | #define nums2minor(num, type, id) ((num << 6) | (id << 4) | type) |
1da177e4 | 64 | #define MAX_DVB_MINORS (DVB_MAX_ADAPTERS*64) |
5dd3f307 | 65 | #endif |
1da177e4 | 66 | |
56b22935 | 67 | static struct class *dvb_class; |
1da177e4 | 68 | |
5dd3f307 AO |
69 | static struct dvb_device *dvb_minors[MAX_DVB_MINORS]; |
70 | static DECLARE_RWSEM(minor_rwsem); | |
1da177e4 LT |
71 | |
72 | static int dvb_device_open(struct inode *inode, struct file *file) | |
73 | { | |
74 | struct dvb_device *dvbdev; | |
75 | ||
72024f1e | 76 | mutex_lock(&dvbdev_mutex); |
5dd3f307 AO |
77 | down_read(&minor_rwsem); |
78 | dvbdev = dvb_minors[iminor(inode)]; | |
1da177e4 LT |
79 | |
80 | if (dvbdev && dvbdev->fops) { | |
81 | int err = 0; | |
e84f9e57 | 82 | const struct file_operations *new_fops; |
1da177e4 | 83 | |
e84f9e57 AV |
84 | new_fops = fops_get(dvbdev->fops); |
85 | if (!new_fops) | |
f41ced8f | 86 | goto fail; |
e84f9e57 AV |
87 | file->private_data = dvbdev; |
88 | replace_fops(file, new_fops); | |
89 | if (file->f_op->open) | |
0ede1876 | 90 | err = file->f_op->open(inode, file); |
5dd3f307 | 91 | up_read(&minor_rwsem); |
72024f1e | 92 | mutex_unlock(&dvbdev_mutex); |
afd1a0c9 | 93 | return err; |
1da177e4 | 94 | } |
f41ced8f | 95 | fail: |
5dd3f307 | 96 | up_read(&minor_rwsem); |
72024f1e | 97 | mutex_unlock(&dvbdev_mutex); |
1da177e4 LT |
98 | return -ENODEV; |
99 | } | |
100 | ||
101 | ||
27a643b1 | 102 | static const struct file_operations dvb_device_fops = |
1da177e4 LT |
103 | { |
104 | .owner = THIS_MODULE, | |
105 | .open = dvb_device_open, | |
6038f373 | 106 | .llseek = noop_llseek, |
1da177e4 LT |
107 | }; |
108 | ||
7e7654a9 | 109 | static struct cdev dvb_device_cdev; |
1da177e4 LT |
110 | |
111 | int dvb_generic_open(struct inode *inode, struct file *file) | |
112 | { | |
afd1a0c9 | 113 | struct dvb_device *dvbdev = file->private_data; |
1da177e4 | 114 | |
afd1a0c9 MCC |
115 | if (!dvbdev) |
116 | return -ENODEV; | |
1da177e4 LT |
117 | |
118 | if (!dvbdev->users) | |
afd1a0c9 | 119 | return -EBUSY; |
1da177e4 LT |
120 | |
121 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) { | |
afd1a0c9 MCC |
122 | if (!dvbdev->readers) |
123 | return -EBUSY; | |
1da177e4 LT |
124 | dvbdev->readers--; |
125 | } else { | |
afd1a0c9 MCC |
126 | if (!dvbdev->writers) |
127 | return -EBUSY; | |
1da177e4 LT |
128 | dvbdev->writers--; |
129 | } | |
130 | ||
131 | dvbdev->users--; | |
132 | return 0; | |
133 | } | |
134 | EXPORT_SYMBOL(dvb_generic_open); | |
135 | ||
136 | ||
137 | int dvb_generic_release(struct inode *inode, struct file *file) | |
138 | { | |
afd1a0c9 | 139 | struct dvb_device *dvbdev = file->private_data; |
1da177e4 LT |
140 | |
141 | if (!dvbdev) | |
afd1a0c9 | 142 | return -ENODEV; |
1da177e4 LT |
143 | |
144 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) { | |
145 | dvbdev->readers++; | |
146 | } else { | |
147 | dvbdev->writers++; | |
148 | } | |
149 | ||
150 | dvbdev->users++; | |
151 | return 0; | |
152 | } | |
153 | EXPORT_SYMBOL(dvb_generic_release); | |
154 | ||
155 | ||
16ef8def AB |
156 | long dvb_generic_ioctl(struct file *file, |
157 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 158 | { |
afd1a0c9 | 159 | struct dvb_device *dvbdev = file->private_data; |
1da177e4 | 160 | |
afd1a0c9 MCC |
161 | if (!dvbdev) |
162 | return -ENODEV; | |
1da177e4 LT |
163 | |
164 | if (!dvbdev->kernel_ioctl) | |
165 | return -EINVAL; | |
166 | ||
72024f1e | 167 | return dvb_usercopy(file, cmd, arg, dvbdev->kernel_ioctl); |
1da177e4 LT |
168 | } |
169 | EXPORT_SYMBOL(dvb_generic_ioctl); | |
170 | ||
171 | ||
172 | static int dvbdev_get_free_id (struct dvb_adapter *adap, int type) | |
173 | { | |
174 | u32 id = 0; | |
175 | ||
176 | while (id < DVB_MAX_IDS) { | |
79482619 TP |
177 | struct dvb_device *dev; |
178 | list_for_each_entry(dev, &adap->device_list, list_head) | |
1da177e4 LT |
179 | if (dev->type == type && dev->id == id) |
180 | goto skip; | |
1da177e4 LT |
181 | return id; |
182 | skip: | |
183 | id++; | |
184 | } | |
185 | return -ENFILE; | |
186 | } | |
187 | ||
f50d5166 MCC |
188 | static void dvb_media_device_free(struct dvb_device *dvbdev) |
189 | { | |
190 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) | |
191 | if (dvbdev->entity) { | |
192 | media_device_unregister_entity(dvbdev->entity); | |
193 | kfree(dvbdev->entity); | |
194 | kfree(dvbdev->pads); | |
195 | dvbdev->entity = NULL; | |
196 | dvbdev->pads = NULL; | |
197 | } | |
198 | ||
199 | if (dvbdev->tsout_entity) { | |
200 | int i; | |
201 | ||
202 | for (i = 0; i < dvbdev->tsout_num_entities; i++) { | |
203 | media_device_unregister_entity(&dvbdev->tsout_entity[i]); | |
204 | kfree(dvbdev->tsout_entity[i].name); | |
205 | } | |
206 | kfree(dvbdev->tsout_entity); | |
207 | kfree(dvbdev->tsout_pads); | |
208 | dvbdev->tsout_entity = NULL; | |
209 | dvbdev->tsout_pads = NULL; | |
210 | ||
211 | dvbdev->tsout_num_entities = 0; | |
212 | } | |
213 | ||
214 | if (dvbdev->intf_devnode) { | |
215 | media_devnode_remove(dvbdev->intf_devnode); | |
216 | dvbdev->intf_devnode = NULL; | |
217 | } | |
0230d60e MCC |
218 | |
219 | if (dvbdev->adapter->conn) { | |
220 | media_device_unregister_entity(dvbdev->adapter->conn); | |
221 | dvbdev->adapter->conn = NULL; | |
222 | kfree(dvbdev->adapter->conn_pads); | |
223 | dvbdev->adapter->conn_pads = NULL; | |
224 | } | |
f50d5166 MCC |
225 | #endif |
226 | } | |
227 | ||
0820eb5c | 228 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
f50d5166 | 229 | static int dvb_create_tsout_entity(struct dvb_device *dvbdev, |
df2f94e5 MCC |
230 | const char *name, int npads) |
231 | { | |
df2f94e5 MCC |
232 | int i, ret = 0; |
233 | ||
234 | dvbdev->tsout_pads = kcalloc(npads, sizeof(*dvbdev->tsout_pads), | |
235 | GFP_KERNEL); | |
236 | if (!dvbdev->tsout_pads) | |
f50d5166 MCC |
237 | return -ENOMEM; |
238 | ||
df2f94e5 MCC |
239 | dvbdev->tsout_entity = kcalloc(npads, sizeof(*dvbdev->tsout_entity), |
240 | GFP_KERNEL); | |
f50d5166 MCC |
241 | if (!dvbdev->tsout_entity) |
242 | return -ENOMEM; | |
243 | ||
244 | dvbdev->tsout_num_entities = npads; | |
245 | ||
df2f94e5 MCC |
246 | for (i = 0; i < npads; i++) { |
247 | struct media_pad *pads = &dvbdev->tsout_pads[i]; | |
248 | struct media_entity *entity = &dvbdev->tsout_entity[i]; | |
249 | ||
250 | entity->name = kasprintf(GFP_KERNEL, "%s #%d", name, i); | |
f50d5166 MCC |
251 | if (!entity->name) |
252 | return -ENOMEM; | |
df2f94e5 | 253 | |
4ca72efa | 254 | entity->function = MEDIA_ENT_F_IO_DTV; |
df2f94e5 MCC |
255 | pads->flags = MEDIA_PAD_FL_SINK; |
256 | ||
ab22e77c | 257 | ret = media_entity_pads_init(entity, 1, pads); |
df2f94e5 | 258 | if (ret < 0) |
f50d5166 | 259 | return ret; |
df2f94e5 MCC |
260 | |
261 | ret = media_device_register_entity(dvbdev->adapter->mdev, | |
262 | entity); | |
263 | if (ret < 0) | |
f50d5166 | 264 | return ret; |
df2f94e5 | 265 | } |
f50d5166 | 266 | return 0; |
df2f94e5 MCC |
267 | } |
268 | ||
269 | #define DEMUX_TSOUT "demux-tsout" | |
270 | #define DVR_TSOUT "dvr-tsout" | |
271 | ||
f50d5166 MCC |
272 | static int dvb_create_media_entity(struct dvb_device *dvbdev, |
273 | int type, int demux_sink_pads) | |
a0246e02 | 274 | { |
f50d5166 | 275 | int i, ret, npads; |
a0246e02 | 276 | |
8211b187 MCC |
277 | switch (type) { |
278 | case DVB_DEVICE_FRONTEND: | |
279 | npads = 2; | |
280 | break; | |
df2f94e5 | 281 | case DVB_DEVICE_DVR: |
f50d5166 MCC |
282 | ret = dvb_create_tsout_entity(dvbdev, DVR_TSOUT, |
283 | demux_sink_pads); | |
284 | return ret; | |
8211b187 | 285 | case DVB_DEVICE_DEMUX: |
df2f94e5 | 286 | npads = 1 + demux_sink_pads; |
f50d5166 MCC |
287 | ret = dvb_create_tsout_entity(dvbdev, DEMUX_TSOUT, |
288 | demux_sink_pads); | |
289 | if (ret < 0) | |
290 | return ret; | |
8211b187 MCC |
291 | break; |
292 | case DVB_DEVICE_CA: | |
293 | npads = 2; | |
294 | break; | |
295 | case DVB_DEVICE_NET: | |
296 | /* | |
297 | * We should be creating entities for the MPE/ULE | |
298 | * decapsulation hardware (or software implementation). | |
299 | * | |
300 | * However, the number of for the MPE/ULE decaps may not be | |
301 | * fixed. As we don't have yet dynamic support for PADs at | |
302 | * the Media Controller, let's not create the decap | |
303 | * entities yet. | |
304 | */ | |
f50d5166 | 305 | return 0; |
8211b187 | 306 | default: |
f50d5166 | 307 | return 0; |
8211b187 | 308 | } |
a0246e02 MCC |
309 | |
310 | dvbdev->entity = kzalloc(sizeof(*dvbdev->entity), GFP_KERNEL); | |
311 | if (!dvbdev->entity) | |
f50d5166 | 312 | return -ENOMEM; |
a0246e02 | 313 | |
a0246e02 | 314 | dvbdev->entity->name = dvbdev->name; |
172e9d3c | 315 | |
172e9d3c MCC |
316 | if (npads) { |
317 | dvbdev->pads = kcalloc(npads, sizeof(*dvbdev->pads), | |
318 | GFP_KERNEL); | |
f50d5166 MCC |
319 | if (!dvbdev->pads) |
320 | return -ENOMEM; | |
172e9d3c MCC |
321 | } |
322 | ||
a0246e02 MCC |
323 | switch (type) { |
324 | case DVB_DEVICE_FRONTEND: | |
4ca72efa | 325 | dvbdev->entity->function = MEDIA_ENT_F_DTV_DEMOD; |
3bde1b78 MCC |
326 | dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; |
327 | dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE; | |
a0246e02 MCC |
328 | break; |
329 | case DVB_DEVICE_DEMUX: | |
4ca72efa | 330 | dvbdev->entity->function = MEDIA_ENT_F_TS_DEMUX; |
3bde1b78 | 331 | dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; |
df2f94e5 MCC |
332 | for (i = 1; i < npads; i++) |
333 | dvbdev->pads[i].flags = MEDIA_PAD_FL_SOURCE; | |
a0246e02 | 334 | break; |
a0246e02 | 335 | case DVB_DEVICE_CA: |
4ca72efa | 336 | dvbdev->entity->function = MEDIA_ENT_F_DTV_CA; |
3bde1b78 MCC |
337 | dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; |
338 | dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE; | |
a0246e02 | 339 | break; |
a0246e02 | 340 | default: |
f50d5166 | 341 | /* Should never happen, as the first switch prevents it */ |
a0246e02 | 342 | kfree(dvbdev->entity); |
f50d5166 | 343 | kfree(dvbdev->pads); |
a0246e02 | 344 | dvbdev->entity = NULL; |
f50d5166 MCC |
345 | dvbdev->pads = NULL; |
346 | return 0; | |
a0246e02 MCC |
347 | } |
348 | ||
f50d5166 | 349 | if (npads) { |
ab22e77c | 350 | ret = media_entity_pads_init(dvbdev->entity, npads, dvbdev->pads); |
f50d5166 MCC |
351 | if (ret) |
352 | return ret; | |
a0246e02 | 353 | } |
f50d5166 MCC |
354 | ret = media_device_register_entity(dvbdev->adapter->mdev, |
355 | dvbdev->entity); | |
356 | if (ret) | |
eac287ad | 357 | return ret; |
a0246e02 | 358 | |
b3ad24d2 | 359 | pr_info("%s: media entity '%s' registered.\n", |
a0246e02 | 360 | __func__, dvbdev->entity->name); |
f50d5166 | 361 | |
f50d5166 | 362 | return 0; |
a0246e02 | 363 | } |
0820eb5c | 364 | #endif |
1da177e4 | 365 | |
f50d5166 MCC |
366 | static int dvb_register_media_device(struct dvb_device *dvbdev, |
367 | int type, int minor, | |
368 | unsigned demux_sink_pads) | |
8211b187 MCC |
369 | { |
370 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) | |
f50d5166 | 371 | struct media_link *link; |
8211b187 | 372 | u32 intf_type; |
f50d5166 | 373 | int ret; |
8211b187 MCC |
374 | |
375 | if (!dvbdev->adapter->mdev) | |
f50d5166 | 376 | return 0; |
8211b187 | 377 | |
f50d5166 MCC |
378 | ret = dvb_create_media_entity(dvbdev, type, demux_sink_pads); |
379 | if (ret) | |
380 | return ret; | |
8211b187 MCC |
381 | |
382 | switch (type) { | |
383 | case DVB_DEVICE_FRONTEND: | |
384 | intf_type = MEDIA_INTF_T_DVB_FE; | |
385 | break; | |
386 | case DVB_DEVICE_DEMUX: | |
387 | intf_type = MEDIA_INTF_T_DVB_DEMUX; | |
388 | break; | |
389 | case DVB_DEVICE_DVR: | |
390 | intf_type = MEDIA_INTF_T_DVB_DVR; | |
391 | break; | |
392 | case DVB_DEVICE_CA: | |
393 | intf_type = MEDIA_INTF_T_DVB_CA; | |
394 | break; | |
395 | case DVB_DEVICE_NET: | |
396 | intf_type = MEDIA_INTF_T_DVB_NET; | |
397 | break; | |
398 | default: | |
f50d5166 | 399 | return 0; |
8211b187 MCC |
400 | } |
401 | ||
402 | dvbdev->intf_devnode = media_devnode_create(dvbdev->adapter->mdev, | |
f50d5166 | 403 | intf_type, 0, |
0b3b72df | 404 | DVB_MAJOR, minor); |
f50d5166 MCC |
405 | |
406 | if (!dvbdev->intf_devnode) | |
407 | return -ENOMEM; | |
8211b187 MCC |
408 | |
409 | /* | |
410 | * Create the "obvious" link, e. g. the ones that represent | |
411 | * a direct association between an interface and an entity. | |
412 | * Other links should be created elsewhere, like: | |
413 | * DVB FE intf -> tuner | |
414 | * DVB demux intf -> dvr | |
415 | */ | |
416 | ||
f50d5166 MCC |
417 | if (!dvbdev->entity) |
418 | return 0; | |
8211b187 | 419 | |
f50d5166 MCC |
420 | link = media_create_intf_link(dvbdev->entity, &dvbdev->intf_devnode->intf, |
421 | MEDIA_LNK_FL_ENABLED); | |
422 | if (!link) | |
423 | return -ENOMEM; | |
8211b187 | 424 | #endif |
f50d5166 | 425 | return 0; |
8211b187 MCC |
426 | } |
427 | ||
1da177e4 | 428 | int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev, |
df2f94e5 MCC |
429 | const struct dvb_device *template, void *priv, int type, |
430 | int demux_sink_pads) | |
1da177e4 LT |
431 | { |
432 | struct dvb_device *dvbdev; | |
b6190102 | 433 | struct file_operations *dvbdevfops; |
5f553388 | 434 | struct device *clsdev; |
5dd3f307 | 435 | int minor; |
f50d5166 | 436 | int id, ret; |
1da177e4 | 437 | |
c2788502 | 438 | mutex_lock(&dvbdev_register_lock); |
1da177e4 | 439 | |
b6190102 | 440 | if ((id = dvbdev_get_free_id (adap, type)) < 0){ |
1e4baed3 | 441 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 | 442 | *pdvbdev = NULL; |
b3ad24d2 | 443 | pr_err("%s: couldn't find free device id\n", __func__); |
1da177e4 LT |
444 | return -ENFILE; |
445 | } | |
446 | ||
f50d5166 | 447 | *pdvbdev = dvbdev = kzalloc(sizeof(*dvbdev), GFP_KERNEL); |
1da177e4 | 448 | |
b6190102 MS |
449 | if (!dvbdev){ |
450 | mutex_unlock(&dvbdev_register_lock); | |
451 | return -ENOMEM; | |
452 | } | |
453 | ||
454 | dvbdevfops = kzalloc(sizeof(struct file_operations), GFP_KERNEL); | |
455 | ||
456 | if (!dvbdevfops){ | |
457 | kfree (dvbdev); | |
1e4baed3 | 458 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 LT |
459 | return -ENOMEM; |
460 | } | |
461 | ||
1da177e4 LT |
462 | memcpy(dvbdev, template, sizeof(struct dvb_device)); |
463 | dvbdev->type = type; | |
464 | dvbdev->id = id; | |
465 | dvbdev->adapter = adap; | |
466 | dvbdev->priv = priv; | |
b6190102 | 467 | dvbdev->fops = dvbdevfops; |
ca5be9cd | 468 | init_waitqueue_head (&dvbdev->wait_queue); |
1da177e4 | 469 | |
784e29d2 JE |
470 | memcpy(dvbdevfops, template->fops, sizeof(struct file_operations)); |
471 | dvbdevfops->owner = adap->module; | |
1da177e4 LT |
472 | |
473 | list_add_tail (&dvbdev->list_head, &adap->device_list); | |
474 | ||
5dd3f307 AO |
475 | down_write(&minor_rwsem); |
476 | #ifdef CONFIG_DVB_DYNAMIC_MINORS | |
477 | for (minor = 0; minor < MAX_DVB_MINORS; minor++) | |
478 | if (dvb_minors[minor] == NULL) | |
479 | break; | |
480 | ||
481 | if (minor == MAX_DVB_MINORS) { | |
482 | kfree(dvbdevfops); | |
483 | kfree(dvbdev); | |
82163edc | 484 | up_write(&minor_rwsem); |
5dd3f307 AO |
485 | mutex_unlock(&dvbdev_register_lock); |
486 | return -EINVAL; | |
487 | } | |
488 | #else | |
489 | minor = nums2minor(adap->num, type, id); | |
490 | #endif | |
491 | ||
492 | dvbdev->minor = minor; | |
493 | dvb_minors[minor] = dvbdev; | |
494 | up_write(&minor_rwsem); | |
495 | ||
f50d5166 MCC |
496 | ret = dvb_register_media_device(dvbdev, type, minor, demux_sink_pads); |
497 | if (ret) { | |
b3ad24d2 | 498 | pr_err("%s: dvb_register_media_device failed to create the mediagraph\n", |
f50d5166 MCC |
499 | __func__); |
500 | ||
501 | dvb_media_device_free(dvbdev); | |
502 | kfree(dvbdevfops); | |
503 | kfree(dvbdev); | |
504 | up_write(&minor_rwsem); | |
505 | mutex_unlock(&dvbdev_register_lock); | |
506 | return ret; | |
507 | } | |
508 | ||
f47f4763 AQ |
509 | mutex_unlock(&dvbdev_register_lock); |
510 | ||
a9b12619 | 511 | clsdev = device_create(dvb_class, adap->device, |
b7496780 | 512 | MKDEV(DVB_MAJOR, minor), |
a5f4c0ce | 513 | dvbdev, "dvb%d.%s%d", adap->num, dnames[type], id); |
4abdcf93 | 514 | if (IS_ERR(clsdev)) { |
b3ad24d2 | 515 | pr_err("%s: failed to create device dvb%d.%s%d (%ld)\n", |
46b4f7c1 | 516 | __func__, adap->num, dnames[type], id, PTR_ERR(clsdev)); |
4abdcf93 SA |
517 | return PTR_ERR(clsdev); |
518 | } | |
b3ad24d2 | 519 | dprintk("DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n", |
5dd3f307 | 520 | adap->num, dnames[type], id, minor, minor); |
1da177e4 LT |
521 | |
522 | return 0; | |
523 | } | |
524 | EXPORT_SYMBOL(dvb_register_device); | |
525 | ||
526 | ||
1f4ed6cd | 527 | void dvb_remove_device(struct dvb_device *dvbdev) |
1da177e4 LT |
528 | { |
529 | if (!dvbdev) | |
530 | return; | |
531 | ||
5dd3f307 AO |
532 | down_write(&minor_rwsem); |
533 | dvb_minors[dvbdev->minor] = NULL; | |
534 | up_write(&minor_rwsem); | |
535 | ||
f50d5166 | 536 | dvb_media_device_free(dvbdev); |
df2f94e5 | 537 | |
f50d5166 | 538 | device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor)); |
a0246e02 | 539 | |
1da177e4 | 540 | list_del (&dvbdev->list_head); |
1f4ed6cd MK |
541 | } |
542 | EXPORT_SYMBOL(dvb_remove_device); | |
543 | ||
544 | ||
545 | void dvb_free_device(struct dvb_device *dvbdev) | |
546 | { | |
547 | if (!dvbdev) | |
548 | return; | |
549 | ||
b6190102 | 550 | kfree (dvbdev->fops); |
1da177e4 LT |
551 | kfree (dvbdev); |
552 | } | |
1f4ed6cd MK |
553 | EXPORT_SYMBOL(dvb_free_device); |
554 | ||
555 | ||
556 | void dvb_unregister_device(struct dvb_device *dvbdev) | |
557 | { | |
558 | dvb_remove_device(dvbdev); | |
559 | dvb_free_device(dvbdev); | |
560 | } | |
1da177e4 LT |
561 | EXPORT_SYMBOL(dvb_unregister_device); |
562 | ||
4155109a | 563 | |
4155109a | 564 | #ifdef CONFIG_MEDIA_CONTROLLER_DVB |
17813e2a MCC |
565 | |
566 | static int dvb_create_io_intf_links(struct dvb_adapter *adap, | |
567 | struct media_interface *intf, | |
568 | char *name) | |
569 | { | |
570 | struct media_device *mdev = adap->mdev; | |
571 | struct media_entity *entity; | |
572 | struct media_link *link; | |
573 | ||
574 | media_device_for_each_entity(entity, mdev) { | |
575 | if (entity->function == MEDIA_ENT_F_IO_DTV) { | |
576 | if (strncmp(entity->name, name, strlen(name))) | |
577 | continue; | |
578 | link = media_create_intf_link(entity, intf, | |
579 | MEDIA_LNK_FL_ENABLED); | |
580 | if (!link) | |
581 | return -ENOMEM; | |
582 | } | |
583 | } | |
584 | return 0; | |
585 | } | |
586 | ||
0230d60e MCC |
587 | int dvb_create_media_graph(struct dvb_adapter *adap, |
588 | bool create_rf_connector) | |
480884b6 MCC |
589 | { |
590 | struct media_device *mdev = adap->mdev; | |
0230d60e | 591 | struct media_entity *entity, *tuner = NULL, *demod = NULL, *conn; |
df2f94e5 | 592 | struct media_entity *demux = NULL, *ca = NULL; |
f50d5166 | 593 | struct media_link *link; |
8ddb90d2 | 594 | struct media_interface *intf; |
df2f94e5 MCC |
595 | unsigned demux_pad = 0; |
596 | unsigned dvr_pad = 0; | |
a0cce2a0 | 597 | unsigned ntuner = 0, ndemod = 0; |
f50d5166 | 598 | int ret; |
0230d60e | 599 | static const char *connector_name = "Television"; |
4155109a MCC |
600 | |
601 | if (!mdev) | |
f50d5166 | 602 | return 0; |
4155109a MCC |
603 | |
604 | media_device_for_each_entity(entity, mdev) { | |
0e576b76 | 605 | switch (entity->function) { |
4ca72efa | 606 | case MEDIA_ENT_F_TUNER: |
4155109a | 607 | tuner = entity; |
a0cce2a0 | 608 | ntuner++; |
4155109a | 609 | break; |
4ca72efa | 610 | case MEDIA_ENT_F_DTV_DEMOD: |
32fdc0e1 | 611 | demod = entity; |
a0cce2a0 | 612 | ndemod++; |
4155109a | 613 | break; |
4ca72efa | 614 | case MEDIA_ENT_F_TS_DEMUX: |
4155109a MCC |
615 | demux = entity; |
616 | break; | |
4ca72efa | 617 | case MEDIA_ENT_F_DTV_CA: |
4155109a MCC |
618 | ca = entity; |
619 | break; | |
620 | } | |
621 | } | |
622 | ||
a0cce2a0 MCC |
623 | /* |
624 | * Prepare to signalize to media_create_pad_links() that multiple | |
625 | * entities of the same type exists and a 1:n or n:1 links need to be | |
626 | * created. | |
627 | * NOTE: if both tuner and demod have multiple instances, it is up | |
628 | * to the caller driver to create such links. | |
629 | */ | |
630 | if (ntuner > 1) | |
631 | tuner = NULL; | |
632 | if (ndemod > 1) | |
633 | demod = NULL; | |
634 | ||
0230d60e MCC |
635 | if (create_rf_connector) { |
636 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); | |
637 | if (!conn) | |
638 | return -ENOMEM; | |
639 | adap->conn = conn; | |
640 | ||
5c3fbc5e | 641 | adap->conn_pads = kzalloc(sizeof(*adap->conn_pads), GFP_KERNEL); |
0230d60e MCC |
642 | if (!adap->conn_pads) |
643 | return -ENOMEM; | |
644 | ||
645 | conn->flags = MEDIA_ENT_FL_CONNECTOR; | |
646 | conn->function = MEDIA_ENT_F_CONN_RF; | |
647 | conn->name = connector_name; | |
648 | adap->conn_pads->flags = MEDIA_PAD_FL_SOURCE; | |
649 | ||
650 | ret = media_entity_pads_init(conn, 1, adap->conn_pads); | |
651 | if (ret) | |
652 | return ret; | |
653 | ||
654 | ret = media_device_register_entity(mdev, conn); | |
655 | if (ret) | |
656 | return ret; | |
657 | ||
a0cce2a0 MCC |
658 | if (!ntuner) |
659 | ret = media_create_pad_links(mdev, | |
660 | MEDIA_ENT_F_CONN_RF, | |
661 | conn, 0, | |
662 | MEDIA_ENT_F_DTV_DEMOD, | |
663 | demod, 0, | |
664 | MEDIA_LNK_FL_ENABLED, | |
665 | false); | |
0230d60e | 666 | else |
a0cce2a0 MCC |
667 | ret = media_create_pad_links(mdev, |
668 | MEDIA_ENT_F_CONN_RF, | |
669 | conn, 0, | |
670 | MEDIA_ENT_F_TUNER, | |
671 | tuner, TUNER_PAD_RF_INPUT, | |
672 | MEDIA_LNK_FL_ENABLED, | |
673 | false); | |
0230d60e MCC |
674 | if (ret) |
675 | return ret; | |
676 | } | |
677 | ||
a0cce2a0 MCC |
678 | if (ntuner && ndemod) { |
679 | ret = media_create_pad_links(mdev, | |
680 | MEDIA_ENT_F_TUNER, | |
163c9bca | 681 | tuner, TUNER_PAD_OUTPUT, |
a0cce2a0 MCC |
682 | MEDIA_ENT_F_DTV_DEMOD, |
683 | demod, 0, MEDIA_LNK_FL_ENABLED, | |
684 | false); | |
f50d5166 MCC |
685 | if (ret) |
686 | return ret; | |
687 | } | |
4155109a | 688 | |
a0cce2a0 MCC |
689 | if (ndemod && demux) { |
690 | ret = media_create_pad_links(mdev, | |
691 | MEDIA_ENT_F_DTV_DEMOD, | |
692 | demod, 1, | |
693 | MEDIA_ENT_F_TS_DEMUX, | |
694 | demux, 0, MEDIA_LNK_FL_ENABLED, | |
695 | false); | |
f50d5166 | 696 | if (ret) |
acc37e8f | 697 | return ret; |
f50d5166 MCC |
698 | } |
699 | if (demux && ca) { | |
700 | ret = media_create_pad_link(demux, 1, ca, | |
701 | 0, MEDIA_LNK_FL_ENABLED); | |
711f3fba | 702 | if (ret) |
acc37e8f | 703 | return ret; |
f50d5166 | 704 | } |
8ddb90d2 | 705 | |
df2f94e5 MCC |
706 | /* Create demux links for each ringbuffer/pad */ |
707 | if (demux) { | |
708 | media_device_for_each_entity(entity, mdev) { | |
4ca72efa | 709 | if (entity->function == MEDIA_ENT_F_IO_DTV) { |
df2f94e5 | 710 | if (!strncmp(entity->name, DVR_TSOUT, |
f50d5166 MCC |
711 | strlen(DVR_TSOUT))) { |
712 | ret = media_create_pad_link(demux, | |
713 | ++dvr_pad, | |
714 | entity, 0, 0); | |
715 | if (ret) | |
716 | return ret; | |
717 | } | |
df2f94e5 | 718 | if (!strncmp(entity->name, DEMUX_TSOUT, |
f50d5166 MCC |
719 | strlen(DEMUX_TSOUT))) { |
720 | ret = media_create_pad_link(demux, | |
df2f94e5 | 721 | ++demux_pad, |
f50d5166 MCC |
722 | entity, 0, 0); |
723 | if (ret) | |
724 | return ret; | |
725 | } | |
df2f94e5 MCC |
726 | } |
727 | } | |
728 | } | |
729 | ||
8ed07142 | 730 | /* Create interface links for FE->tuner, DVR->demux and CA->ca */ |
cf975a4b | 731 | media_device_for_each_intf(intf, mdev) { |
f50d5166 MCC |
732 | if (intf->type == MEDIA_INTF_T_DVB_CA && ca) { |
733 | link = media_create_intf_link(ca, intf, | |
734 | MEDIA_LNK_FL_ENABLED); | |
735 | if (!link) | |
736 | return -ENOMEM; | |
737 | } | |
cf975a4b | 738 | |
f50d5166 MCC |
739 | if (intf->type == MEDIA_INTF_T_DVB_FE && tuner) { |
740 | link = media_create_intf_link(tuner, intf, | |
741 | MEDIA_LNK_FL_ENABLED); | |
742 | if (!link) | |
743 | return -ENOMEM; | |
744 | } | |
8ed07142 MCC |
745 | #if 0 |
746 | /* | |
747 | * Indirect link - let's not create yet, as we don't know how | |
748 | * to handle indirect links, nor if this will | |
749 | * actually be needed. | |
750 | */ | |
f50d5166 MCC |
751 | if (intf->type == MEDIA_INTF_T_DVB_DVR && demux) { |
752 | link = media_create_intf_link(demux, intf, | |
753 | MEDIA_LNK_FL_ENABLED); | |
754 | if (!link) | |
755 | return -ENOMEM; | |
756 | } | |
8ed07142 | 757 | #endif |
17813e2a MCC |
758 | if (intf->type == MEDIA_INTF_T_DVB_DVR) { |
759 | ret = dvb_create_io_intf_links(adap, intf, DVR_TSOUT); | |
760 | if (ret) | |
761 | return ret; | |
762 | } | |
763 | if (intf->type == MEDIA_INTF_T_DVB_DEMUX) { | |
764 | ret = dvb_create_io_intf_links(adap, intf, DEMUX_TSOUT); | |
765 | if (ret) | |
766 | return ret; | |
df2f94e5 | 767 | } |
8ddb90d2 | 768 | } |
f50d5166 | 769 | return 0; |
4155109a MCC |
770 | } |
771 | EXPORT_SYMBOL_GPL(dvb_create_media_graph); | |
480884b6 | 772 | #endif |
4155109a | 773 | |
78e92006 JG |
774 | static int dvbdev_check_free_adapter_num(int num) |
775 | { | |
776 | struct list_head *entry; | |
777 | list_for_each(entry, &dvb_adapter_list) { | |
778 | struct dvb_adapter *adap; | |
779 | adap = list_entry(entry, struct dvb_adapter, list_head); | |
780 | if (adap->num == num) | |
781 | return 0; | |
782 | } | |
783 | return 1; | |
784 | } | |
1da177e4 LT |
785 | |
786 | static int dvbdev_get_free_adapter_num (void) | |
787 | { | |
788 | int num = 0; | |
789 | ||
790 | while (num < DVB_MAX_ADAPTERS) { | |
78e92006 JG |
791 | if (dvbdev_check_free_adapter_num(num)) |
792 | return num; | |
1da177e4 LT |
793 | num++; |
794 | } | |
795 | ||
796 | return -ENFILE; | |
797 | } | |
798 | ||
799 | ||
78e92006 JG |
800 | int dvb_register_adapter(struct dvb_adapter *adap, const char *name, |
801 | struct module *module, struct device *device, | |
802 | short *adapter_nums) | |
1da177e4 | 803 | { |
78e92006 | 804 | int i, num; |
1da177e4 | 805 | |
c2788502 | 806 | mutex_lock(&dvbdev_register_lock); |
1da177e4 | 807 | |
78e92006 JG |
808 | for (i = 0; i < DVB_MAX_ADAPTERS; ++i) { |
809 | num = adapter_nums[i]; | |
810 | if (num >= 0 && num < DVB_MAX_ADAPTERS) { | |
811 | /* use the one the driver asked for */ | |
812 | if (dvbdev_check_free_adapter_num(num)) | |
813 | break; | |
814 | } else { | |
815 | num = dvbdev_get_free_adapter_num(); | |
816 | break; | |
817 | } | |
818 | num = -1; | |
819 | } | |
820 | ||
821 | if (num < 0) { | |
1e4baed3 | 822 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 LT |
823 | return -ENFILE; |
824 | } | |
825 | ||
1da177e4 LT |
826 | memset (adap, 0, sizeof(struct dvb_adapter)); |
827 | INIT_LIST_HEAD (&adap->device_list); | |
828 | ||
b3ad24d2 | 829 | pr_info("DVB: registering new adapter (%s)\n", name); |
1da177e4 | 830 | |
1da177e4 LT |
831 | adap->num = num; |
832 | adap->name = name; | |
833 | adap->module = module; | |
d09dbf92 | 834 | adap->device = device; |
59b1842d DB |
835 | adap->mfe_shared = 0; |
836 | adap->mfe_dvbdev = NULL; | |
837 | mutex_init (&adap->mfe_lock); | |
1da177e4 LT |
838 | |
839 | list_add_tail (&adap->list_head, &dvb_adapter_list); | |
840 | ||
1e4baed3 | 841 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 LT |
842 | |
843 | return num; | |
844 | } | |
845 | EXPORT_SYMBOL(dvb_register_adapter); | |
846 | ||
847 | ||
848 | int dvb_unregister_adapter(struct dvb_adapter *adap) | |
849 | { | |
c2788502 | 850 | mutex_lock(&dvbdev_register_lock); |
1da177e4 | 851 | list_del (&adap->list_head); |
1e4baed3 | 852 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 LT |
853 | return 0; |
854 | } | |
855 | EXPORT_SYMBOL(dvb_unregister_adapter); | |
856 | ||
857 | /* if the miracle happens and "generic_usercopy()" is included into | |
858 | the kernel, then this can vanish. please don't make the mistake and | |
859 | define this as video_usercopy(). this will introduce a dependecy | |
860 | to the v4l "videodev.o" module, which is unnecessary for some | |
861 | cards (ie. the budget dvb-cards don't need the v4l module...) */ | |
16ef8def | 862 | int dvb_usercopy(struct file *file, |
afd1a0c9 | 863 | unsigned int cmd, unsigned long arg, |
16ef8def | 864 | int (*func)(struct file *file, |
1da177e4 LT |
865 | unsigned int cmd, void *arg)) |
866 | { | |
afd1a0c9 MCC |
867 | char sbuf[128]; |
868 | void *mbuf = NULL; | |
869 | void *parg = NULL; | |
870 | int err = -EINVAL; | |
871 | ||
872 | /* Copy arguments into temp kernel buffer */ | |
873 | switch (_IOC_DIR(cmd)) { | |
874 | case _IOC_NONE: | |
1da177e4 LT |
875 | /* |
876 | * For this command, the pointer is actually an integer | |
877 | * argument. | |
878 | */ | |
879 | parg = (void *) arg; | |
880 | break; | |
afd1a0c9 MCC |
881 | case _IOC_READ: /* some v4l ioctls are marked wrong ... */ |
882 | case _IOC_WRITE: | |
883 | case (_IOC_WRITE | _IOC_READ): | |
884 | if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { | |
50c25fff | 885 | parg = sbuf; |
afd1a0c9 | 886 | } else { |
50c25fff | 887 | /* too big to allocate from stack */ |
0ede1876 | 888 | mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); |
50c25fff MK |
889 | if (NULL == mbuf) |
890 | return -ENOMEM; | |
891 | parg = mbuf; | |
afd1a0c9 MCC |
892 | } |
893 | ||
894 | err = -EFAULT; | |
895 | if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd))) | |
50c25fff | 896 | goto out; |
afd1a0c9 MCC |
897 | break; |
898 | } | |
899 | ||
900 | /* call driver */ | |
16ef8def | 901 | if ((err = func(file, cmd, parg)) == -ENOIOCTLCMD) |
d9751fd0 | 902 | err = -ENOTTY; |
afd1a0c9 MCC |
903 | |
904 | if (err < 0) | |
905 | goto out; | |
906 | ||
907 | /* Copy results into user buffer */ | |
908 | switch (_IOC_DIR(cmd)) | |
909 | { | |
910 | case _IOC_READ: | |
911 | case (_IOC_WRITE | _IOC_READ): | |
912 | if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) | |
50c25fff | 913 | err = -EFAULT; |
afd1a0c9 MCC |
914 | break; |
915 | } | |
1da177e4 LT |
916 | |
917 | out: | |
afd1a0c9 MCC |
918 | kfree(mbuf); |
919 | return err; | |
1da177e4 LT |
920 | } |
921 | ||
a5f4c0ce KS |
922 | static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env) |
923 | { | |
924 | struct dvb_device *dvbdev = dev_get_drvdata(dev); | |
925 | ||
a5f4c0ce | 926 | add_uevent_var(env, "DVB_ADAPTER_NUM=%d", dvbdev->adapter->num); |
763d19bb KS |
927 | add_uevent_var(env, "DVB_DEVICE_TYPE=%s", dnames[dvbdev->type]); |
928 | add_uevent_var(env, "DVB_DEVICE_NUM=%d", dvbdev->id); | |
a5f4c0ce KS |
929 | return 0; |
930 | } | |
931 | ||
2c9ede55 | 932 | static char *dvb_devnode(struct device *dev, umode_t *mode) |
8a8bdcc7 KS |
933 | { |
934 | struct dvb_device *dvbdev = dev_get_drvdata(dev); | |
935 | ||
936 | return kasprintf(GFP_KERNEL, "dvb/adapter%d/%s%d", | |
937 | dvbdev->adapter->num, dnames[dvbdev->type], dvbdev->id); | |
938 | } | |
939 | ||
940 | ||
1da177e4 LT |
941 | static int __init init_dvbdev(void) |
942 | { | |
943 | int retval; | |
944 | dev_t dev = MKDEV(DVB_MAJOR, 0); | |
945 | ||
946 | if ((retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB")) != 0) { | |
b3ad24d2 | 947 | pr_err("dvb-core: unable to get major %d\n", DVB_MAJOR); |
1da177e4 LT |
948 | return retval; |
949 | } | |
950 | ||
951 | cdev_init(&dvb_device_cdev, &dvb_device_fops); | |
952 | if ((retval = cdev_add(&dvb_device_cdev, dev, MAX_DVB_MINORS)) != 0) { | |
b3ad24d2 | 953 | pr_err("dvb-core: unable register character device\n"); |
1da177e4 LT |
954 | goto error; |
955 | } | |
956 | ||
56b22935 | 957 | dvb_class = class_create(THIS_MODULE, "dvb"); |
1da177e4 LT |
958 | if (IS_ERR(dvb_class)) { |
959 | retval = PTR_ERR(dvb_class); | |
960 | goto error; | |
961 | } | |
a5f4c0ce | 962 | dvb_class->dev_uevent = dvb_uevent; |
e454cea2 | 963 | dvb_class->devnode = dvb_devnode; |
1da177e4 LT |
964 | return 0; |
965 | ||
966 | error: | |
967 | cdev_del(&dvb_device_cdev); | |
968 | unregister_chrdev_region(dev, MAX_DVB_MINORS); | |
969 | return retval; | |
970 | } | |
971 | ||
972 | ||
973 | static void __exit exit_dvbdev(void) | |
974 | { | |
56b22935 | 975 | class_destroy(dvb_class); |
1da177e4 | 976 | cdev_del(&dvb_device_cdev); |
afd1a0c9 | 977 | unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS); |
1da177e4 LT |
978 | } |
979 | ||
4abdcf93 | 980 | subsys_initcall(init_dvbdev); |
1da177e4 LT |
981 | module_exit(exit_dvbdev); |
982 | ||
983 | MODULE_DESCRIPTION("DVB Core Driver"); | |
984 | MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler"); | |
985 | MODULE_LICENSE("GPL"); |