Commit | Line | Data |
---|---|---|
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> |
8f569c0b | 27 | #include <linux/i2c.h> |
1da177e4 LT |
28 | #include <linux/init.h> |
29 | #include <linux/slab.h> | |
30 | #include <linux/device.h> | |
31 | #include <linux/fs.h> | |
32 | #include <linux/cdev.h> | |
1e4baed3 | 33 | #include <linux/mutex.h> |
fada1935 | 34 | #include <media/dvbdev.h> |
1da177e4 | 35 | |
188d2d55 MCC |
36 | /* Due to enum tuner_pad_index */ |
37 | #include <media/tuner.h> | |
38 | ||
72024f1e | 39 | static DEFINE_MUTEX(dvbdev_mutex); |
1da177e4 LT |
40 | static int dvbdev_debug; |
41 | ||
42 | module_param(dvbdev_debug, int, 0644); | |
43 | MODULE_PARM_DESC(dvbdev_debug, "Turn on/off device debugging (default:off)."); | |
44 | ||
b3ad24d2 MCC |
45 | #define dprintk(fmt, arg...) do { \ |
46 | if (dvbdev_debug) \ | |
47 | printk(KERN_DEBUG pr_fmt("%s: " fmt), \ | |
48 | __func__, ##arg); \ | |
49 | } while (0) | |
1da177e4 LT |
50 | |
51 | static LIST_HEAD(dvb_adapter_list); | |
1e4baed3 | 52 | static DEFINE_MUTEX(dvbdev_register_lock); |
1da177e4 LT |
53 | |
54 | static const char * const dnames[] = { | |
6bbf7a85 MCC |
55 | [DVB_DEVICE_VIDEO] = "video", |
56 | [DVB_DEVICE_AUDIO] = "audio", | |
57 | [DVB_DEVICE_SEC] = "sec", | |
58 | [DVB_DEVICE_FRONTEND] = "frontend", | |
59 | [DVB_DEVICE_DEMUX] = "demux", | |
60 | [DVB_DEVICE_DVR] = "dvr", | |
61 | [DVB_DEVICE_CA] = "ca", | |
62 | [DVB_DEVICE_NET] = "net", | |
63 | [DVB_DEVICE_OSD] = "osd" | |
1da177e4 LT |
64 | }; |
65 | ||
5dd3f307 AO |
66 | #ifdef CONFIG_DVB_DYNAMIC_MINORS |
67 | #define MAX_DVB_MINORS 256 | |
68 | #define DVB_MAX_IDS MAX_DVB_MINORS | |
69 | #else | |
1da177e4 | 70 | #define DVB_MAX_IDS 4 |
6bbf7a85 | 71 | |
8382e556 MCC |
72 | static const u8 minor_type[] = { |
73 | [DVB_DEVICE_VIDEO] = 0, | |
74 | [DVB_DEVICE_AUDIO] = 1, | |
75 | [DVB_DEVICE_SEC] = 2, | |
76 | [DVB_DEVICE_FRONTEND] = 3, | |
77 | [DVB_DEVICE_DEMUX] = 4, | |
78 | [DVB_DEVICE_DVR] = 5, | |
79 | [DVB_DEVICE_CA] = 6, | |
80 | [DVB_DEVICE_NET] = 7, | |
81 | [DVB_DEVICE_OSD] = 8, | |
82 | }; | |
83 | ||
84 | #define nums2minor(num, type, id) \ | |
85 | (((num) << 6) | ((id) << 4) | minor_type[type]) | |
6bbf7a85 | 86 | |
1da177e4 | 87 | #define MAX_DVB_MINORS (DVB_MAX_ADAPTERS*64) |
5dd3f307 | 88 | #endif |
1da177e4 | 89 | |
56b22935 | 90 | static struct class *dvb_class; |
1da177e4 | 91 | |
5dd3f307 AO |
92 | static struct dvb_device *dvb_minors[MAX_DVB_MINORS]; |
93 | static DECLARE_RWSEM(minor_rwsem); | |
1da177e4 LT |
94 | |
95 | static int dvb_device_open(struct inode *inode, struct file *file) | |
96 | { | |
97 | struct dvb_device *dvbdev; | |
98 | ||
72024f1e | 99 | mutex_lock(&dvbdev_mutex); |
5dd3f307 AO |
100 | down_read(&minor_rwsem); |
101 | dvbdev = dvb_minors[iminor(inode)]; | |
1da177e4 LT |
102 | |
103 | if (dvbdev && dvbdev->fops) { | |
104 | int err = 0; | |
e84f9e57 | 105 | const struct file_operations *new_fops; |
1da177e4 | 106 | |
e84f9e57 AV |
107 | new_fops = fops_get(dvbdev->fops); |
108 | if (!new_fops) | |
f41ced8f | 109 | goto fail; |
e84f9e57 AV |
110 | file->private_data = dvbdev; |
111 | replace_fops(file, new_fops); | |
112 | if (file->f_op->open) | |
0ede1876 | 113 | err = file->f_op->open(inode, file); |
5dd3f307 | 114 | up_read(&minor_rwsem); |
72024f1e | 115 | mutex_unlock(&dvbdev_mutex); |
afd1a0c9 | 116 | return err; |
1da177e4 | 117 | } |
f41ced8f | 118 | fail: |
5dd3f307 | 119 | up_read(&minor_rwsem); |
72024f1e | 120 | mutex_unlock(&dvbdev_mutex); |
1da177e4 LT |
121 | return -ENODEV; |
122 | } | |
123 | ||
124 | ||
27a643b1 | 125 | static const struct file_operations dvb_device_fops = |
1da177e4 LT |
126 | { |
127 | .owner = THIS_MODULE, | |
128 | .open = dvb_device_open, | |
6038f373 | 129 | .llseek = noop_llseek, |
1da177e4 LT |
130 | }; |
131 | ||
7e7654a9 | 132 | static struct cdev dvb_device_cdev; |
1da177e4 LT |
133 | |
134 | int dvb_generic_open(struct inode *inode, struct file *file) | |
135 | { | |
afd1a0c9 | 136 | struct dvb_device *dvbdev = file->private_data; |
1da177e4 | 137 | |
afd1a0c9 MCC |
138 | if (!dvbdev) |
139 | return -ENODEV; | |
1da177e4 LT |
140 | |
141 | if (!dvbdev->users) | |
afd1a0c9 | 142 | return -EBUSY; |
1da177e4 LT |
143 | |
144 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) { | |
afd1a0c9 MCC |
145 | if (!dvbdev->readers) |
146 | return -EBUSY; | |
1da177e4 LT |
147 | dvbdev->readers--; |
148 | } else { | |
afd1a0c9 MCC |
149 | if (!dvbdev->writers) |
150 | return -EBUSY; | |
1da177e4 LT |
151 | dvbdev->writers--; |
152 | } | |
153 | ||
154 | dvbdev->users--; | |
155 | return 0; | |
156 | } | |
157 | EXPORT_SYMBOL(dvb_generic_open); | |
158 | ||
159 | ||
160 | int dvb_generic_release(struct inode *inode, struct file *file) | |
161 | { | |
afd1a0c9 | 162 | struct dvb_device *dvbdev = file->private_data; |
1da177e4 LT |
163 | |
164 | if (!dvbdev) | |
afd1a0c9 | 165 | return -ENODEV; |
1da177e4 LT |
166 | |
167 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) { | |
168 | dvbdev->readers++; | |
169 | } else { | |
170 | dvbdev->writers++; | |
171 | } | |
172 | ||
173 | dvbdev->users++; | |
174 | return 0; | |
175 | } | |
176 | EXPORT_SYMBOL(dvb_generic_release); | |
177 | ||
178 | ||
16ef8def AB |
179 | long dvb_generic_ioctl(struct file *file, |
180 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 181 | { |
afd1a0c9 | 182 | struct dvb_device *dvbdev = file->private_data; |
1da177e4 | 183 | |
afd1a0c9 MCC |
184 | if (!dvbdev) |
185 | return -ENODEV; | |
1da177e4 LT |
186 | |
187 | if (!dvbdev->kernel_ioctl) | |
188 | return -EINVAL; | |
189 | ||
72024f1e | 190 | return dvb_usercopy(file, cmd, arg, dvbdev->kernel_ioctl); |
1da177e4 LT |
191 | } |
192 | EXPORT_SYMBOL(dvb_generic_ioctl); | |
193 | ||
194 | ||
195 | static int dvbdev_get_free_id (struct dvb_adapter *adap, int type) | |
196 | { | |
197 | u32 id = 0; | |
198 | ||
199 | while (id < DVB_MAX_IDS) { | |
79482619 TP |
200 | struct dvb_device *dev; |
201 | list_for_each_entry(dev, &adap->device_list, list_head) | |
1da177e4 LT |
202 | if (dev->type == type && dev->id == id) |
203 | goto skip; | |
1da177e4 LT |
204 | return id; |
205 | skip: | |
206 | id++; | |
207 | } | |
208 | return -ENFILE; | |
209 | } | |
210 | ||
f50d5166 MCC |
211 | static void dvb_media_device_free(struct dvb_device *dvbdev) |
212 | { | |
213 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) | |
214 | if (dvbdev->entity) { | |
215 | media_device_unregister_entity(dvbdev->entity); | |
216 | kfree(dvbdev->entity); | |
217 | kfree(dvbdev->pads); | |
218 | dvbdev->entity = NULL; | |
219 | dvbdev->pads = NULL; | |
220 | } | |
221 | ||
222 | if (dvbdev->tsout_entity) { | |
223 | int i; | |
224 | ||
225 | for (i = 0; i < dvbdev->tsout_num_entities; i++) { | |
226 | media_device_unregister_entity(&dvbdev->tsout_entity[i]); | |
227 | kfree(dvbdev->tsout_entity[i].name); | |
228 | } | |
229 | kfree(dvbdev->tsout_entity); | |
230 | kfree(dvbdev->tsout_pads); | |
231 | dvbdev->tsout_entity = NULL; | |
232 | dvbdev->tsout_pads = NULL; | |
233 | ||
234 | dvbdev->tsout_num_entities = 0; | |
235 | } | |
236 | ||
237 | if (dvbdev->intf_devnode) { | |
238 | media_devnode_remove(dvbdev->intf_devnode); | |
239 | dvbdev->intf_devnode = NULL; | |
240 | } | |
0230d60e MCC |
241 | |
242 | if (dvbdev->adapter->conn) { | |
243 | media_device_unregister_entity(dvbdev->adapter->conn); | |
244 | dvbdev->adapter->conn = NULL; | |
245 | kfree(dvbdev->adapter->conn_pads); | |
246 | dvbdev->adapter->conn_pads = NULL; | |
247 | } | |
f50d5166 MCC |
248 | #endif |
249 | } | |
250 | ||
0820eb5c | 251 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
f50d5166 | 252 | static int dvb_create_tsout_entity(struct dvb_device *dvbdev, |
df2f94e5 MCC |
253 | const char *name, int npads) |
254 | { | |
df2f94e5 MCC |
255 | int i, ret = 0; |
256 | ||
257 | dvbdev->tsout_pads = kcalloc(npads, sizeof(*dvbdev->tsout_pads), | |
258 | GFP_KERNEL); | |
259 | if (!dvbdev->tsout_pads) | |
f50d5166 MCC |
260 | return -ENOMEM; |
261 | ||
df2f94e5 MCC |
262 | dvbdev->tsout_entity = kcalloc(npads, sizeof(*dvbdev->tsout_entity), |
263 | GFP_KERNEL); | |
f50d5166 MCC |
264 | if (!dvbdev->tsout_entity) |
265 | return -ENOMEM; | |
266 | ||
267 | dvbdev->tsout_num_entities = npads; | |
268 | ||
df2f94e5 MCC |
269 | for (i = 0; i < npads; i++) { |
270 | struct media_pad *pads = &dvbdev->tsout_pads[i]; | |
271 | struct media_entity *entity = &dvbdev->tsout_entity[i]; | |
272 | ||
273 | entity->name = kasprintf(GFP_KERNEL, "%s #%d", name, i); | |
f50d5166 MCC |
274 | if (!entity->name) |
275 | return -ENOMEM; | |
df2f94e5 | 276 | |
4ca72efa | 277 | entity->function = MEDIA_ENT_F_IO_DTV; |
df2f94e5 MCC |
278 | pads->flags = MEDIA_PAD_FL_SINK; |
279 | ||
ab22e77c | 280 | ret = media_entity_pads_init(entity, 1, pads); |
df2f94e5 | 281 | if (ret < 0) |
f50d5166 | 282 | return ret; |
df2f94e5 MCC |
283 | |
284 | ret = media_device_register_entity(dvbdev->adapter->mdev, | |
285 | entity); | |
286 | if (ret < 0) | |
f50d5166 | 287 | return ret; |
df2f94e5 | 288 | } |
f50d5166 | 289 | return 0; |
df2f94e5 MCC |
290 | } |
291 | ||
292 | #define DEMUX_TSOUT "demux-tsout" | |
293 | #define DVR_TSOUT "dvr-tsout" | |
294 | ||
f50d5166 MCC |
295 | static int dvb_create_media_entity(struct dvb_device *dvbdev, |
296 | int type, int demux_sink_pads) | |
a0246e02 | 297 | { |
f50d5166 | 298 | int i, ret, npads; |
a0246e02 | 299 | |
8211b187 MCC |
300 | switch (type) { |
301 | case DVB_DEVICE_FRONTEND: | |
302 | npads = 2; | |
303 | break; | |
df2f94e5 | 304 | case DVB_DEVICE_DVR: |
f50d5166 MCC |
305 | ret = dvb_create_tsout_entity(dvbdev, DVR_TSOUT, |
306 | demux_sink_pads); | |
307 | return ret; | |
8211b187 | 308 | case DVB_DEVICE_DEMUX: |
df2f94e5 | 309 | npads = 1 + demux_sink_pads; |
f50d5166 MCC |
310 | ret = dvb_create_tsout_entity(dvbdev, DEMUX_TSOUT, |
311 | demux_sink_pads); | |
312 | if (ret < 0) | |
313 | return ret; | |
8211b187 MCC |
314 | break; |
315 | case DVB_DEVICE_CA: | |
316 | npads = 2; | |
317 | break; | |
318 | case DVB_DEVICE_NET: | |
319 | /* | |
320 | * We should be creating entities for the MPE/ULE | |
321 | * decapsulation hardware (or software implementation). | |
322 | * | |
323 | * However, the number of for the MPE/ULE decaps may not be | |
324 | * fixed. As we don't have yet dynamic support for PADs at | |
325 | * the Media Controller, let's not create the decap | |
326 | * entities yet. | |
327 | */ | |
f50d5166 | 328 | return 0; |
8211b187 | 329 | default: |
f50d5166 | 330 | return 0; |
8211b187 | 331 | } |
a0246e02 MCC |
332 | |
333 | dvbdev->entity = kzalloc(sizeof(*dvbdev->entity), GFP_KERNEL); | |
334 | if (!dvbdev->entity) | |
f50d5166 | 335 | return -ENOMEM; |
a0246e02 | 336 | |
a0246e02 | 337 | dvbdev->entity->name = dvbdev->name; |
172e9d3c | 338 | |
172e9d3c MCC |
339 | if (npads) { |
340 | dvbdev->pads = kcalloc(npads, sizeof(*dvbdev->pads), | |
341 | GFP_KERNEL); | |
f50d5166 MCC |
342 | if (!dvbdev->pads) |
343 | return -ENOMEM; | |
172e9d3c MCC |
344 | } |
345 | ||
a0246e02 MCC |
346 | switch (type) { |
347 | case DVB_DEVICE_FRONTEND: | |
4ca72efa | 348 | dvbdev->entity->function = MEDIA_ENT_F_DTV_DEMOD; |
3bde1b78 MCC |
349 | dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; |
350 | dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE; | |
a0246e02 MCC |
351 | break; |
352 | case DVB_DEVICE_DEMUX: | |
4ca72efa | 353 | dvbdev->entity->function = MEDIA_ENT_F_TS_DEMUX; |
3bde1b78 | 354 | dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; |
df2f94e5 MCC |
355 | for (i = 1; i < npads; i++) |
356 | dvbdev->pads[i].flags = MEDIA_PAD_FL_SOURCE; | |
a0246e02 | 357 | break; |
a0246e02 | 358 | case DVB_DEVICE_CA: |
4ca72efa | 359 | dvbdev->entity->function = MEDIA_ENT_F_DTV_CA; |
3bde1b78 MCC |
360 | dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; |
361 | dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE; | |
a0246e02 | 362 | break; |
a0246e02 | 363 | default: |
f50d5166 | 364 | /* Should never happen, as the first switch prevents it */ |
a0246e02 | 365 | kfree(dvbdev->entity); |
f50d5166 | 366 | kfree(dvbdev->pads); |
a0246e02 | 367 | dvbdev->entity = NULL; |
f50d5166 MCC |
368 | dvbdev->pads = NULL; |
369 | return 0; | |
a0246e02 MCC |
370 | } |
371 | ||
f50d5166 | 372 | if (npads) { |
ab22e77c | 373 | ret = media_entity_pads_init(dvbdev->entity, npads, dvbdev->pads); |
f50d5166 MCC |
374 | if (ret) |
375 | return ret; | |
a0246e02 | 376 | } |
f50d5166 MCC |
377 | ret = media_device_register_entity(dvbdev->adapter->mdev, |
378 | dvbdev->entity); | |
379 | if (ret) | |
eac287ad | 380 | return ret; |
a0246e02 | 381 | |
b3ad24d2 | 382 | pr_info("%s: media entity '%s' registered.\n", |
a0246e02 | 383 | __func__, dvbdev->entity->name); |
f50d5166 | 384 | |
f50d5166 | 385 | return 0; |
a0246e02 | 386 | } |
0820eb5c | 387 | #endif |
1da177e4 | 388 | |
f50d5166 MCC |
389 | static int dvb_register_media_device(struct dvb_device *dvbdev, |
390 | int type, int minor, | |
391 | unsigned demux_sink_pads) | |
8211b187 MCC |
392 | { |
393 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) | |
f50d5166 | 394 | struct media_link *link; |
8211b187 | 395 | u32 intf_type; |
f50d5166 | 396 | int ret; |
8211b187 MCC |
397 | |
398 | if (!dvbdev->adapter->mdev) | |
f50d5166 | 399 | return 0; |
8211b187 | 400 | |
f50d5166 MCC |
401 | ret = dvb_create_media_entity(dvbdev, type, demux_sink_pads); |
402 | if (ret) | |
403 | return ret; | |
8211b187 MCC |
404 | |
405 | switch (type) { | |
406 | case DVB_DEVICE_FRONTEND: | |
407 | intf_type = MEDIA_INTF_T_DVB_FE; | |
408 | break; | |
409 | case DVB_DEVICE_DEMUX: | |
410 | intf_type = MEDIA_INTF_T_DVB_DEMUX; | |
411 | break; | |
412 | case DVB_DEVICE_DVR: | |
413 | intf_type = MEDIA_INTF_T_DVB_DVR; | |
414 | break; | |
415 | case DVB_DEVICE_CA: | |
416 | intf_type = MEDIA_INTF_T_DVB_CA; | |
417 | break; | |
418 | case DVB_DEVICE_NET: | |
419 | intf_type = MEDIA_INTF_T_DVB_NET; | |
420 | break; | |
421 | default: | |
f50d5166 | 422 | return 0; |
8211b187 MCC |
423 | } |
424 | ||
425 | dvbdev->intf_devnode = media_devnode_create(dvbdev->adapter->mdev, | |
f50d5166 | 426 | intf_type, 0, |
0b3b72df | 427 | DVB_MAJOR, minor); |
f50d5166 MCC |
428 | |
429 | if (!dvbdev->intf_devnode) | |
430 | return -ENOMEM; | |
8211b187 MCC |
431 | |
432 | /* | |
433 | * Create the "obvious" link, e. g. the ones that represent | |
434 | * a direct association between an interface and an entity. | |
435 | * Other links should be created elsewhere, like: | |
436 | * DVB FE intf -> tuner | |
437 | * DVB demux intf -> dvr | |
438 | */ | |
439 | ||
f50d5166 MCC |
440 | if (!dvbdev->entity) |
441 | return 0; | |
8211b187 | 442 | |
4d1e4545 HV |
443 | link = media_create_intf_link(dvbdev->entity, |
444 | &dvbdev->intf_devnode->intf, | |
445 | MEDIA_LNK_FL_ENABLED | | |
446 | MEDIA_LNK_FL_IMMUTABLE); | |
f50d5166 MCC |
447 | if (!link) |
448 | return -ENOMEM; | |
8211b187 | 449 | #endif |
f50d5166 | 450 | return 0; |
8211b187 MCC |
451 | } |
452 | ||
1da177e4 | 453 | int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev, |
6bbf7a85 MCC |
454 | const struct dvb_device *template, void *priv, |
455 | enum dvb_device_type type, int demux_sink_pads) | |
1da177e4 LT |
456 | { |
457 | struct dvb_device *dvbdev; | |
b6190102 | 458 | struct file_operations *dvbdevfops; |
5f553388 | 459 | struct device *clsdev; |
5dd3f307 | 460 | int minor; |
f50d5166 | 461 | int id, ret; |
1da177e4 | 462 | |
c2788502 | 463 | mutex_lock(&dvbdev_register_lock); |
1da177e4 | 464 | |
b6190102 | 465 | if ((id = dvbdev_get_free_id (adap, type)) < 0){ |
1e4baed3 | 466 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 | 467 | *pdvbdev = NULL; |
b3ad24d2 | 468 | pr_err("%s: couldn't find free device id\n", __func__); |
1da177e4 LT |
469 | return -ENFILE; |
470 | } | |
471 | ||
f50d5166 | 472 | *pdvbdev = dvbdev = kzalloc(sizeof(*dvbdev), GFP_KERNEL); |
1da177e4 | 473 | |
b6190102 MS |
474 | if (!dvbdev){ |
475 | mutex_unlock(&dvbdev_register_lock); | |
476 | return -ENOMEM; | |
477 | } | |
478 | ||
479 | dvbdevfops = kzalloc(sizeof(struct file_operations), GFP_KERNEL); | |
480 | ||
481 | if (!dvbdevfops){ | |
482 | kfree (dvbdev); | |
1e4baed3 | 483 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 LT |
484 | return -ENOMEM; |
485 | } | |
486 | ||
1da177e4 LT |
487 | memcpy(dvbdev, template, sizeof(struct dvb_device)); |
488 | dvbdev->type = type; | |
489 | dvbdev->id = id; | |
490 | dvbdev->adapter = adap; | |
491 | dvbdev->priv = priv; | |
b6190102 | 492 | dvbdev->fops = dvbdevfops; |
ca5be9cd | 493 | init_waitqueue_head (&dvbdev->wait_queue); |
1da177e4 | 494 | |
784e29d2 JE |
495 | memcpy(dvbdevfops, template->fops, sizeof(struct file_operations)); |
496 | dvbdevfops->owner = adap->module; | |
1da177e4 LT |
497 | |
498 | list_add_tail (&dvbdev->list_head, &adap->device_list); | |
499 | ||
5dd3f307 AO |
500 | down_write(&minor_rwsem); |
501 | #ifdef CONFIG_DVB_DYNAMIC_MINORS | |
502 | for (minor = 0; minor < MAX_DVB_MINORS; minor++) | |
503 | if (dvb_minors[minor] == NULL) | |
504 | break; | |
505 | ||
506 | if (minor == MAX_DVB_MINORS) { | |
507 | kfree(dvbdevfops); | |
508 | kfree(dvbdev); | |
82163edc | 509 | up_write(&minor_rwsem); |
5dd3f307 AO |
510 | mutex_unlock(&dvbdev_register_lock); |
511 | return -EINVAL; | |
512 | } | |
513 | #else | |
514 | minor = nums2minor(adap->num, type, id); | |
515 | #endif | |
516 | ||
517 | dvbdev->minor = minor; | |
518 | dvb_minors[minor] = dvbdev; | |
519 | up_write(&minor_rwsem); | |
520 | ||
f50d5166 MCC |
521 | ret = dvb_register_media_device(dvbdev, type, minor, demux_sink_pads); |
522 | if (ret) { | |
b3ad24d2 | 523 | pr_err("%s: dvb_register_media_device failed to create the mediagraph\n", |
f50d5166 MCC |
524 | __func__); |
525 | ||
526 | dvb_media_device_free(dvbdev); | |
527 | kfree(dvbdevfops); | |
528 | kfree(dvbdev); | |
f50d5166 MCC |
529 | mutex_unlock(&dvbdev_register_lock); |
530 | return ret; | |
531 | } | |
532 | ||
f47f4763 AQ |
533 | mutex_unlock(&dvbdev_register_lock); |
534 | ||
a9b12619 | 535 | clsdev = device_create(dvb_class, adap->device, |
b7496780 | 536 | MKDEV(DVB_MAJOR, minor), |
a5f4c0ce | 537 | dvbdev, "dvb%d.%s%d", adap->num, dnames[type], id); |
4abdcf93 | 538 | if (IS_ERR(clsdev)) { |
b3ad24d2 | 539 | pr_err("%s: failed to create device dvb%d.%s%d (%ld)\n", |
46b4f7c1 | 540 | __func__, adap->num, dnames[type], id, PTR_ERR(clsdev)); |
4abdcf93 SA |
541 | return PTR_ERR(clsdev); |
542 | } | |
b3ad24d2 | 543 | dprintk("DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n", |
5dd3f307 | 544 | adap->num, dnames[type], id, minor, minor); |
1da177e4 LT |
545 | |
546 | return 0; | |
547 | } | |
548 | EXPORT_SYMBOL(dvb_register_device); | |
549 | ||
550 | ||
1f4ed6cd | 551 | void dvb_remove_device(struct dvb_device *dvbdev) |
1da177e4 LT |
552 | { |
553 | if (!dvbdev) | |
554 | return; | |
555 | ||
5dd3f307 AO |
556 | down_write(&minor_rwsem); |
557 | dvb_minors[dvbdev->minor] = NULL; | |
558 | up_write(&minor_rwsem); | |
559 | ||
f50d5166 | 560 | dvb_media_device_free(dvbdev); |
df2f94e5 | 561 | |
f50d5166 | 562 | device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor)); |
a0246e02 | 563 | |
1da177e4 | 564 | list_del (&dvbdev->list_head); |
1f4ed6cd MK |
565 | } |
566 | EXPORT_SYMBOL(dvb_remove_device); | |
567 | ||
568 | ||
569 | void dvb_free_device(struct dvb_device *dvbdev) | |
570 | { | |
571 | if (!dvbdev) | |
572 | return; | |
573 | ||
b6190102 | 574 | kfree (dvbdev->fops); |
1da177e4 LT |
575 | kfree (dvbdev); |
576 | } | |
1f4ed6cd MK |
577 | EXPORT_SYMBOL(dvb_free_device); |
578 | ||
579 | ||
580 | void dvb_unregister_device(struct dvb_device *dvbdev) | |
581 | { | |
582 | dvb_remove_device(dvbdev); | |
583 | dvb_free_device(dvbdev); | |
584 | } | |
1da177e4 LT |
585 | EXPORT_SYMBOL(dvb_unregister_device); |
586 | ||
4155109a | 587 | |
4155109a | 588 | #ifdef CONFIG_MEDIA_CONTROLLER_DVB |
17813e2a MCC |
589 | |
590 | static int dvb_create_io_intf_links(struct dvb_adapter *adap, | |
591 | struct media_interface *intf, | |
592 | char *name) | |
593 | { | |
594 | struct media_device *mdev = adap->mdev; | |
595 | struct media_entity *entity; | |
596 | struct media_link *link; | |
597 | ||
598 | media_device_for_each_entity(entity, mdev) { | |
599 | if (entity->function == MEDIA_ENT_F_IO_DTV) { | |
600 | if (strncmp(entity->name, name, strlen(name))) | |
601 | continue; | |
602 | link = media_create_intf_link(entity, intf, | |
4d1e4545 HV |
603 | MEDIA_LNK_FL_ENABLED | |
604 | MEDIA_LNK_FL_IMMUTABLE); | |
17813e2a MCC |
605 | if (!link) |
606 | return -ENOMEM; | |
607 | } | |
608 | } | |
609 | return 0; | |
610 | } | |
611 | ||
0230d60e MCC |
612 | int dvb_create_media_graph(struct dvb_adapter *adap, |
613 | bool create_rf_connector) | |
480884b6 MCC |
614 | { |
615 | struct media_device *mdev = adap->mdev; | |
0230d60e | 616 | struct media_entity *entity, *tuner = NULL, *demod = NULL, *conn; |
df2f94e5 | 617 | struct media_entity *demux = NULL, *ca = NULL; |
f50d5166 | 618 | struct media_link *link; |
8ddb90d2 | 619 | struct media_interface *intf; |
df2f94e5 MCC |
620 | unsigned demux_pad = 0; |
621 | unsigned dvr_pad = 0; | |
a0cce2a0 | 622 | unsigned ntuner = 0, ndemod = 0; |
f3efe15a | 623 | int ret, pad_source, pad_sink; |
0230d60e | 624 | static const char *connector_name = "Television"; |
4155109a MCC |
625 | |
626 | if (!mdev) | |
f50d5166 | 627 | return 0; |
4155109a MCC |
628 | |
629 | media_device_for_each_entity(entity, mdev) { | |
0e576b76 | 630 | switch (entity->function) { |
4ca72efa | 631 | case MEDIA_ENT_F_TUNER: |
4155109a | 632 | tuner = entity; |
a0cce2a0 | 633 | ntuner++; |
4155109a | 634 | break; |
4ca72efa | 635 | case MEDIA_ENT_F_DTV_DEMOD: |
32fdc0e1 | 636 | demod = entity; |
a0cce2a0 | 637 | ndemod++; |
4155109a | 638 | break; |
4ca72efa | 639 | case MEDIA_ENT_F_TS_DEMUX: |
4155109a MCC |
640 | demux = entity; |
641 | break; | |
4ca72efa | 642 | case MEDIA_ENT_F_DTV_CA: |
4155109a MCC |
643 | ca = entity; |
644 | break; | |
645 | } | |
646 | } | |
647 | ||
a0cce2a0 MCC |
648 | /* |
649 | * Prepare to signalize to media_create_pad_links() that multiple | |
650 | * entities of the same type exists and a 1:n or n:1 links need to be | |
651 | * created. | |
652 | * NOTE: if both tuner and demod have multiple instances, it is up | |
653 | * to the caller driver to create such links. | |
654 | */ | |
655 | if (ntuner > 1) | |
656 | tuner = NULL; | |
657 | if (ndemod > 1) | |
658 | demod = NULL; | |
659 | ||
0230d60e MCC |
660 | if (create_rf_connector) { |
661 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); | |
662 | if (!conn) | |
663 | return -ENOMEM; | |
664 | adap->conn = conn; | |
665 | ||
5c3fbc5e | 666 | adap->conn_pads = kzalloc(sizeof(*adap->conn_pads), GFP_KERNEL); |
0230d60e MCC |
667 | if (!adap->conn_pads) |
668 | return -ENOMEM; | |
669 | ||
670 | conn->flags = MEDIA_ENT_FL_CONNECTOR; | |
671 | conn->function = MEDIA_ENT_F_CONN_RF; | |
672 | conn->name = connector_name; | |
673 | adap->conn_pads->flags = MEDIA_PAD_FL_SOURCE; | |
674 | ||
675 | ret = media_entity_pads_init(conn, 1, adap->conn_pads); | |
676 | if (ret) | |
677 | return ret; | |
678 | ||
679 | ret = media_device_register_entity(mdev, conn); | |
680 | if (ret) | |
681 | return ret; | |
682 | ||
f3efe15a | 683 | if (!ntuner) { |
a0cce2a0 MCC |
684 | ret = media_create_pad_links(mdev, |
685 | MEDIA_ENT_F_CONN_RF, | |
686 | conn, 0, | |
687 | MEDIA_ENT_F_DTV_DEMOD, | |
688 | demod, 0, | |
689 | MEDIA_LNK_FL_ENABLED, | |
690 | false); | |
f3efe15a MCC |
691 | } else { |
692 | pad_sink = media_get_pad_index(tuner, true, | |
693 | PAD_SIGNAL_ANALOG); | |
694 | if (pad_sink < 0) | |
695 | return -EINVAL; | |
a0cce2a0 MCC |
696 | ret = media_create_pad_links(mdev, |
697 | MEDIA_ENT_F_CONN_RF, | |
698 | conn, 0, | |
699 | MEDIA_ENT_F_TUNER, | |
f3efe15a | 700 | tuner, pad_sink, |
a0cce2a0 MCC |
701 | MEDIA_LNK_FL_ENABLED, |
702 | false); | |
f3efe15a | 703 | } |
0230d60e MCC |
704 | if (ret) |
705 | return ret; | |
706 | } | |
707 | ||
a0cce2a0 | 708 | if (ntuner && ndemod) { |
f3efe15a MCC |
709 | pad_source = media_get_pad_index(tuner, true, |
710 | PAD_SIGNAL_ANALOG); | |
711 | if (pad_source) | |
712 | return -EINVAL; | |
a0cce2a0 MCC |
713 | ret = media_create_pad_links(mdev, |
714 | MEDIA_ENT_F_TUNER, | |
f3efe15a | 715 | tuner, pad_source, |
a0cce2a0 MCC |
716 | MEDIA_ENT_F_DTV_DEMOD, |
717 | demod, 0, MEDIA_LNK_FL_ENABLED, | |
718 | false); | |
f50d5166 MCC |
719 | if (ret) |
720 | return ret; | |
721 | } | |
4155109a | 722 | |
a0cce2a0 MCC |
723 | if (ndemod && demux) { |
724 | ret = media_create_pad_links(mdev, | |
725 | MEDIA_ENT_F_DTV_DEMOD, | |
726 | demod, 1, | |
727 | MEDIA_ENT_F_TS_DEMUX, | |
728 | demux, 0, MEDIA_LNK_FL_ENABLED, | |
729 | false); | |
f50d5166 | 730 | if (ret) |
acc37e8f | 731 | return ret; |
f50d5166 MCC |
732 | } |
733 | if (demux && ca) { | |
734 | ret = media_create_pad_link(demux, 1, ca, | |
735 | 0, MEDIA_LNK_FL_ENABLED); | |
711f3fba | 736 | if (ret) |
acc37e8f | 737 | return ret; |
f50d5166 | 738 | } |
8ddb90d2 | 739 | |
df2f94e5 MCC |
740 | /* Create demux links for each ringbuffer/pad */ |
741 | if (demux) { | |
742 | media_device_for_each_entity(entity, mdev) { | |
4ca72efa | 743 | if (entity->function == MEDIA_ENT_F_IO_DTV) { |
df2f94e5 | 744 | if (!strncmp(entity->name, DVR_TSOUT, |
f50d5166 MCC |
745 | strlen(DVR_TSOUT))) { |
746 | ret = media_create_pad_link(demux, | |
747 | ++dvr_pad, | |
748 | entity, 0, 0); | |
749 | if (ret) | |
750 | return ret; | |
751 | } | |
df2f94e5 | 752 | if (!strncmp(entity->name, DEMUX_TSOUT, |
f50d5166 MCC |
753 | strlen(DEMUX_TSOUT))) { |
754 | ret = media_create_pad_link(demux, | |
df2f94e5 | 755 | ++demux_pad, |
f50d5166 MCC |
756 | entity, 0, 0); |
757 | if (ret) | |
758 | return ret; | |
759 | } | |
df2f94e5 MCC |
760 | } |
761 | } | |
762 | } | |
763 | ||
8ed07142 | 764 | /* Create interface links for FE->tuner, DVR->demux and CA->ca */ |
cf975a4b | 765 | media_device_for_each_intf(intf, mdev) { |
f50d5166 MCC |
766 | if (intf->type == MEDIA_INTF_T_DVB_CA && ca) { |
767 | link = media_create_intf_link(ca, intf, | |
4d1e4545 HV |
768 | MEDIA_LNK_FL_ENABLED | |
769 | MEDIA_LNK_FL_IMMUTABLE); | |
f50d5166 MCC |
770 | if (!link) |
771 | return -ENOMEM; | |
772 | } | |
cf975a4b | 773 | |
f50d5166 MCC |
774 | if (intf->type == MEDIA_INTF_T_DVB_FE && tuner) { |
775 | link = media_create_intf_link(tuner, intf, | |
4d1e4545 HV |
776 | MEDIA_LNK_FL_ENABLED | |
777 | MEDIA_LNK_FL_IMMUTABLE); | |
f50d5166 MCC |
778 | if (!link) |
779 | return -ENOMEM; | |
780 | } | |
8ed07142 MCC |
781 | #if 0 |
782 | /* | |
783 | * Indirect link - let's not create yet, as we don't know how | |
784 | * to handle indirect links, nor if this will | |
785 | * actually be needed. | |
786 | */ | |
f50d5166 MCC |
787 | if (intf->type == MEDIA_INTF_T_DVB_DVR && demux) { |
788 | link = media_create_intf_link(demux, intf, | |
4d1e4545 HV |
789 | MEDIA_LNK_FL_ENABLED | |
790 | MEDIA_LNK_FL_IMMUTABLE); | |
f50d5166 MCC |
791 | if (!link) |
792 | return -ENOMEM; | |
793 | } | |
8ed07142 | 794 | #endif |
17813e2a MCC |
795 | if (intf->type == MEDIA_INTF_T_DVB_DVR) { |
796 | ret = dvb_create_io_intf_links(adap, intf, DVR_TSOUT); | |
797 | if (ret) | |
798 | return ret; | |
799 | } | |
800 | if (intf->type == MEDIA_INTF_T_DVB_DEMUX) { | |
801 | ret = dvb_create_io_intf_links(adap, intf, DEMUX_TSOUT); | |
802 | if (ret) | |
803 | return ret; | |
df2f94e5 | 804 | } |
8ddb90d2 | 805 | } |
f50d5166 | 806 | return 0; |
4155109a MCC |
807 | } |
808 | EXPORT_SYMBOL_GPL(dvb_create_media_graph); | |
480884b6 | 809 | #endif |
4155109a | 810 | |
78e92006 JG |
811 | static int dvbdev_check_free_adapter_num(int num) |
812 | { | |
813 | struct list_head *entry; | |
814 | list_for_each(entry, &dvb_adapter_list) { | |
815 | struct dvb_adapter *adap; | |
816 | adap = list_entry(entry, struct dvb_adapter, list_head); | |
817 | if (adap->num == num) | |
818 | return 0; | |
819 | } | |
820 | return 1; | |
821 | } | |
1da177e4 LT |
822 | |
823 | static int dvbdev_get_free_adapter_num (void) | |
824 | { | |
825 | int num = 0; | |
826 | ||
827 | while (num < DVB_MAX_ADAPTERS) { | |
78e92006 JG |
828 | if (dvbdev_check_free_adapter_num(num)) |
829 | return num; | |
1da177e4 LT |
830 | num++; |
831 | } | |
832 | ||
833 | return -ENFILE; | |
834 | } | |
835 | ||
836 | ||
78e92006 JG |
837 | int dvb_register_adapter(struct dvb_adapter *adap, const char *name, |
838 | struct module *module, struct device *device, | |
839 | short *adapter_nums) | |
1da177e4 | 840 | { |
78e92006 | 841 | int i, num; |
1da177e4 | 842 | |
c2788502 | 843 | mutex_lock(&dvbdev_register_lock); |
1da177e4 | 844 | |
78e92006 JG |
845 | for (i = 0; i < DVB_MAX_ADAPTERS; ++i) { |
846 | num = adapter_nums[i]; | |
847 | if (num >= 0 && num < DVB_MAX_ADAPTERS) { | |
848 | /* use the one the driver asked for */ | |
849 | if (dvbdev_check_free_adapter_num(num)) | |
850 | break; | |
851 | } else { | |
852 | num = dvbdev_get_free_adapter_num(); | |
853 | break; | |
854 | } | |
855 | num = -1; | |
856 | } | |
857 | ||
858 | if (num < 0) { | |
1e4baed3 | 859 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 LT |
860 | return -ENFILE; |
861 | } | |
862 | ||
1da177e4 LT |
863 | memset (adap, 0, sizeof(struct dvb_adapter)); |
864 | INIT_LIST_HEAD (&adap->device_list); | |
865 | ||
b3ad24d2 | 866 | pr_info("DVB: registering new adapter (%s)\n", name); |
1da177e4 | 867 | |
1da177e4 LT |
868 | adap->num = num; |
869 | adap->name = name; | |
870 | adap->module = module; | |
d09dbf92 | 871 | adap->device = device; |
59b1842d DB |
872 | adap->mfe_shared = 0; |
873 | adap->mfe_dvbdev = NULL; | |
874 | mutex_init (&adap->mfe_lock); | |
1da177e4 | 875 | |
f17c403a MK |
876 | #ifdef CONFIG_MEDIA_CONTROLLER_DVB |
877 | mutex_init(&adap->mdev_lock); | |
878 | #endif | |
879 | ||
1da177e4 LT |
880 | list_add_tail (&adap->list_head, &dvb_adapter_list); |
881 | ||
1e4baed3 | 882 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 LT |
883 | |
884 | return num; | |
885 | } | |
886 | EXPORT_SYMBOL(dvb_register_adapter); | |
887 | ||
888 | ||
889 | int dvb_unregister_adapter(struct dvb_adapter *adap) | |
890 | { | |
c2788502 | 891 | mutex_lock(&dvbdev_register_lock); |
1da177e4 | 892 | list_del (&adap->list_head); |
1e4baed3 | 893 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 LT |
894 | return 0; |
895 | } | |
896 | EXPORT_SYMBOL(dvb_unregister_adapter); | |
897 | ||
898 | /* if the miracle happens and "generic_usercopy()" is included into | |
899 | the kernel, then this can vanish. please don't make the mistake and | |
7808239d | 900 | define this as video_usercopy(). this will introduce a dependency |
1da177e4 LT |
901 | to the v4l "videodev.o" module, which is unnecessary for some |
902 | cards (ie. the budget dvb-cards don't need the v4l module...) */ | |
16ef8def | 903 | int dvb_usercopy(struct file *file, |
afd1a0c9 | 904 | unsigned int cmd, unsigned long arg, |
16ef8def | 905 | int (*func)(struct file *file, |
1da177e4 LT |
906 | unsigned int cmd, void *arg)) |
907 | { | |
afd1a0c9 MCC |
908 | char sbuf[128]; |
909 | void *mbuf = NULL; | |
910 | void *parg = NULL; | |
911 | int err = -EINVAL; | |
912 | ||
913 | /* Copy arguments into temp kernel buffer */ | |
914 | switch (_IOC_DIR(cmd)) { | |
915 | case _IOC_NONE: | |
1da177e4 LT |
916 | /* |
917 | * For this command, the pointer is actually an integer | |
918 | * argument. | |
919 | */ | |
920 | parg = (void *) arg; | |
921 | break; | |
afd1a0c9 MCC |
922 | case _IOC_READ: /* some v4l ioctls are marked wrong ... */ |
923 | case _IOC_WRITE: | |
924 | case (_IOC_WRITE | _IOC_READ): | |
925 | if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { | |
50c25fff | 926 | parg = sbuf; |
afd1a0c9 | 927 | } else { |
50c25fff | 928 | /* too big to allocate from stack */ |
0ede1876 | 929 | mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); |
50c25fff MK |
930 | if (NULL == mbuf) |
931 | return -ENOMEM; | |
932 | parg = mbuf; | |
afd1a0c9 MCC |
933 | } |
934 | ||
935 | err = -EFAULT; | |
936 | if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd))) | |
50c25fff | 937 | goto out; |
afd1a0c9 MCC |
938 | break; |
939 | } | |
940 | ||
941 | /* call driver */ | |
16ef8def | 942 | if ((err = func(file, cmd, parg)) == -ENOIOCTLCMD) |
d9751fd0 | 943 | err = -ENOTTY; |
afd1a0c9 MCC |
944 | |
945 | if (err < 0) | |
946 | goto out; | |
947 | ||
948 | /* Copy results into user buffer */ | |
949 | switch (_IOC_DIR(cmd)) | |
950 | { | |
951 | case _IOC_READ: | |
952 | case (_IOC_WRITE | _IOC_READ): | |
953 | if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) | |
50c25fff | 954 | err = -EFAULT; |
afd1a0c9 MCC |
955 | break; |
956 | } | |
1da177e4 LT |
957 | |
958 | out: | |
afd1a0c9 MCC |
959 | kfree(mbuf); |
960 | return err; | |
1da177e4 LT |
961 | } |
962 | ||
1980bfa6 | 963 | #if IS_ENABLED(CONFIG_I2C) |
8f569c0b MCC |
964 | struct i2c_client *dvb_module_probe(const char *module_name, |
965 | const char *name, | |
966 | struct i2c_adapter *adap, | |
967 | unsigned char addr, | |
968 | void *platform_data) | |
969 | { | |
970 | struct i2c_client *client; | |
971 | struct i2c_board_info *board_info; | |
972 | ||
973 | board_info = kzalloc(sizeof(*board_info), GFP_KERNEL); | |
39adb4e7 MCC |
974 | if (!board_info) |
975 | return NULL; | |
8f569c0b MCC |
976 | |
977 | if (name) | |
c0decac1 | 978 | strscpy(board_info->type, name, I2C_NAME_SIZE); |
8f569c0b | 979 | else |
c0decac1 | 980 | strscpy(board_info->type, module_name, I2C_NAME_SIZE); |
8f569c0b MCC |
981 | |
982 | board_info->addr = addr; | |
983 | board_info->platform_data = platform_data; | |
984 | request_module(module_name); | |
985 | client = i2c_new_device(adap, board_info); | |
986 | if (client == NULL || client->dev.driver == NULL) { | |
987 | kfree(board_info); | |
988 | return NULL; | |
989 | } | |
990 | ||
991 | if (!try_module_get(client->dev.driver->owner)) { | |
992 | i2c_unregister_device(client); | |
993 | client = NULL; | |
994 | } | |
995 | ||
996 | kfree(board_info); | |
997 | return client; | |
998 | } | |
999 | EXPORT_SYMBOL_GPL(dvb_module_probe); | |
1000 | ||
1001 | void dvb_module_release(struct i2c_client *client) | |
1002 | { | |
1003 | if (!client) | |
1004 | return; | |
1005 | ||
1006 | module_put(client->dev.driver->owner); | |
1007 | i2c_unregister_device(client); | |
1008 | } | |
1009 | EXPORT_SYMBOL_GPL(dvb_module_release); | |
1010 | #endif | |
1011 | ||
a5f4c0ce KS |
1012 | static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env) |
1013 | { | |
1014 | struct dvb_device *dvbdev = dev_get_drvdata(dev); | |
1015 | ||
a5f4c0ce | 1016 | add_uevent_var(env, "DVB_ADAPTER_NUM=%d", dvbdev->adapter->num); |
763d19bb KS |
1017 | add_uevent_var(env, "DVB_DEVICE_TYPE=%s", dnames[dvbdev->type]); |
1018 | add_uevent_var(env, "DVB_DEVICE_NUM=%d", dvbdev->id); | |
a5f4c0ce KS |
1019 | return 0; |
1020 | } | |
1021 | ||
2c9ede55 | 1022 | static char *dvb_devnode(struct device *dev, umode_t *mode) |
8a8bdcc7 KS |
1023 | { |
1024 | struct dvb_device *dvbdev = dev_get_drvdata(dev); | |
1025 | ||
1026 | return kasprintf(GFP_KERNEL, "dvb/adapter%d/%s%d", | |
1027 | dvbdev->adapter->num, dnames[dvbdev->type], dvbdev->id); | |
1028 | } | |
1029 | ||
1030 | ||
1da177e4 LT |
1031 | static int __init init_dvbdev(void) |
1032 | { | |
1033 | int retval; | |
1034 | dev_t dev = MKDEV(DVB_MAJOR, 0); | |
1035 | ||
1036 | if ((retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB")) != 0) { | |
b3ad24d2 | 1037 | pr_err("dvb-core: unable to get major %d\n", DVB_MAJOR); |
1da177e4 LT |
1038 | return retval; |
1039 | } | |
1040 | ||
1041 | cdev_init(&dvb_device_cdev, &dvb_device_fops); | |
1042 | if ((retval = cdev_add(&dvb_device_cdev, dev, MAX_DVB_MINORS)) != 0) { | |
b3ad24d2 | 1043 | pr_err("dvb-core: unable register character device\n"); |
1da177e4 LT |
1044 | goto error; |
1045 | } | |
1046 | ||
56b22935 | 1047 | dvb_class = class_create(THIS_MODULE, "dvb"); |
1da177e4 LT |
1048 | if (IS_ERR(dvb_class)) { |
1049 | retval = PTR_ERR(dvb_class); | |
1050 | goto error; | |
1051 | } | |
a5f4c0ce | 1052 | dvb_class->dev_uevent = dvb_uevent; |
e454cea2 | 1053 | dvb_class->devnode = dvb_devnode; |
1da177e4 LT |
1054 | return 0; |
1055 | ||
1056 | error: | |
1057 | cdev_del(&dvb_device_cdev); | |
1058 | unregister_chrdev_region(dev, MAX_DVB_MINORS); | |
1059 | return retval; | |
1060 | } | |
1061 | ||
1062 | ||
1063 | static void __exit exit_dvbdev(void) | |
1064 | { | |
56b22935 | 1065 | class_destroy(dvb_class); |
1da177e4 | 1066 | cdev_del(&dvb_device_cdev); |
afd1a0c9 | 1067 | unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS); |
1da177e4 LT |
1068 | } |
1069 | ||
4abdcf93 | 1070 | subsys_initcall(init_dvbdev); |
1da177e4 LT |
1071 | module_exit(exit_dvbdev); |
1072 | ||
1073 | MODULE_DESCRIPTION("DVB Core Driver"); | |
1074 | MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler"); | |
1075 | MODULE_LICENSE("GPL"); |