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 | * | |
18 | * You should have received a copy of the GNU Lesser 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 | */ | |
23 | ||
24 | #include <linux/types.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/string.h> | |
27 | #include <linux/module.h> | |
1da177e4 | 28 | #include <linux/kernel.h> |
1da177e4 LT |
29 | #include <linux/init.h> |
30 | #include <linux/slab.h> | |
31 | #include <linux/device.h> | |
32 | #include <linux/fs.h> | |
33 | #include <linux/cdev.h> | |
1e4baed3 | 34 | #include <linux/mutex.h> |
1da177e4 LT |
35 | #include "dvbdev.h" |
36 | ||
72024f1e | 37 | static DEFINE_MUTEX(dvbdev_mutex); |
1da177e4 LT |
38 | static int dvbdev_debug; |
39 | ||
40 | module_param(dvbdev_debug, int, 0644); | |
41 | MODULE_PARM_DESC(dvbdev_debug, "Turn on/off device debugging (default:off)."); | |
42 | ||
43 | #define dprintk if (dvbdev_debug) printk | |
44 | ||
45 | static LIST_HEAD(dvb_adapter_list); | |
1e4baed3 | 46 | static DEFINE_MUTEX(dvbdev_register_lock); |
1da177e4 LT |
47 | |
48 | static const char * const dnames[] = { | |
afd1a0c9 | 49 | "video", "audio", "sec", "frontend", "demux", "dvr", "ca", |
1da177e4 LT |
50 | "net", "osd" |
51 | }; | |
52 | ||
5dd3f307 AO |
53 | #ifdef CONFIG_DVB_DYNAMIC_MINORS |
54 | #define MAX_DVB_MINORS 256 | |
55 | #define DVB_MAX_IDS MAX_DVB_MINORS | |
56 | #else | |
1da177e4 LT |
57 | #define DVB_MAX_IDS 4 |
58 | #define nums2minor(num,type,id) ((num << 6) | (id << 4) | type) | |
59 | #define MAX_DVB_MINORS (DVB_MAX_ADAPTERS*64) | |
5dd3f307 | 60 | #endif |
1da177e4 | 61 | |
56b22935 | 62 | static struct class *dvb_class; |
1da177e4 | 63 | |
5dd3f307 AO |
64 | static struct dvb_device *dvb_minors[MAX_DVB_MINORS]; |
65 | static DECLARE_RWSEM(minor_rwsem); | |
1da177e4 LT |
66 | |
67 | static int dvb_device_open(struct inode *inode, struct file *file) | |
68 | { | |
69 | struct dvb_device *dvbdev; | |
70 | ||
72024f1e | 71 | mutex_lock(&dvbdev_mutex); |
5dd3f307 AO |
72 | down_read(&minor_rwsem); |
73 | dvbdev = dvb_minors[iminor(inode)]; | |
1da177e4 LT |
74 | |
75 | if (dvbdev && dvbdev->fops) { | |
76 | int err = 0; | |
e84f9e57 | 77 | const struct file_operations *new_fops; |
1da177e4 | 78 | |
e84f9e57 AV |
79 | new_fops = fops_get(dvbdev->fops); |
80 | if (!new_fops) | |
f41ced8f | 81 | goto fail; |
e84f9e57 AV |
82 | file->private_data = dvbdev; |
83 | replace_fops(file, new_fops); | |
84 | if (file->f_op->open) | |
50c25fff | 85 | err = file->f_op->open(inode,file); |
5dd3f307 | 86 | up_read(&minor_rwsem); |
72024f1e | 87 | mutex_unlock(&dvbdev_mutex); |
afd1a0c9 | 88 | return err; |
1da177e4 | 89 | } |
f41ced8f | 90 | fail: |
5dd3f307 | 91 | up_read(&minor_rwsem); |
72024f1e | 92 | mutex_unlock(&dvbdev_mutex); |
1da177e4 LT |
93 | return -ENODEV; |
94 | } | |
95 | ||
96 | ||
27a643b1 | 97 | static const struct file_operations dvb_device_fops = |
1da177e4 LT |
98 | { |
99 | .owner = THIS_MODULE, | |
100 | .open = dvb_device_open, | |
6038f373 | 101 | .llseek = noop_llseek, |
1da177e4 LT |
102 | }; |
103 | ||
7e7654a9 | 104 | static struct cdev dvb_device_cdev; |
1da177e4 LT |
105 | |
106 | int dvb_generic_open(struct inode *inode, struct file *file) | |
107 | { | |
afd1a0c9 | 108 | struct dvb_device *dvbdev = file->private_data; |
1da177e4 | 109 | |
afd1a0c9 MCC |
110 | if (!dvbdev) |
111 | return -ENODEV; | |
1da177e4 LT |
112 | |
113 | if (!dvbdev->users) | |
afd1a0c9 | 114 | return -EBUSY; |
1da177e4 LT |
115 | |
116 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) { | |
afd1a0c9 MCC |
117 | if (!dvbdev->readers) |
118 | return -EBUSY; | |
1da177e4 LT |
119 | dvbdev->readers--; |
120 | } else { | |
afd1a0c9 MCC |
121 | if (!dvbdev->writers) |
122 | return -EBUSY; | |
1da177e4 LT |
123 | dvbdev->writers--; |
124 | } | |
125 | ||
126 | dvbdev->users--; | |
127 | return 0; | |
128 | } | |
129 | EXPORT_SYMBOL(dvb_generic_open); | |
130 | ||
131 | ||
132 | int dvb_generic_release(struct inode *inode, struct file *file) | |
133 | { | |
afd1a0c9 | 134 | struct dvb_device *dvbdev = file->private_data; |
1da177e4 LT |
135 | |
136 | if (!dvbdev) | |
afd1a0c9 | 137 | return -ENODEV; |
1da177e4 LT |
138 | |
139 | if ((file->f_flags & O_ACCMODE) == O_RDONLY) { | |
140 | dvbdev->readers++; | |
141 | } else { | |
142 | dvbdev->writers++; | |
143 | } | |
144 | ||
145 | dvbdev->users++; | |
146 | return 0; | |
147 | } | |
148 | EXPORT_SYMBOL(dvb_generic_release); | |
149 | ||
150 | ||
16ef8def AB |
151 | long dvb_generic_ioctl(struct file *file, |
152 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 153 | { |
afd1a0c9 | 154 | struct dvb_device *dvbdev = file->private_data; |
1da177e4 | 155 | |
afd1a0c9 MCC |
156 | if (!dvbdev) |
157 | return -ENODEV; | |
1da177e4 LT |
158 | |
159 | if (!dvbdev->kernel_ioctl) | |
160 | return -EINVAL; | |
161 | ||
72024f1e | 162 | return dvb_usercopy(file, cmd, arg, dvbdev->kernel_ioctl); |
1da177e4 LT |
163 | } |
164 | EXPORT_SYMBOL(dvb_generic_ioctl); | |
165 | ||
166 | ||
167 | static int dvbdev_get_free_id (struct dvb_adapter *adap, int type) | |
168 | { | |
169 | u32 id = 0; | |
170 | ||
171 | while (id < DVB_MAX_IDS) { | |
79482619 TP |
172 | struct dvb_device *dev; |
173 | list_for_each_entry(dev, &adap->device_list, list_head) | |
1da177e4 LT |
174 | if (dev->type == type && dev->id == id) |
175 | goto skip; | |
1da177e4 LT |
176 | return id; |
177 | skip: | |
178 | id++; | |
179 | } | |
180 | return -ENFILE; | |
181 | } | |
182 | ||
8211b187 MCC |
183 | static void dvb_create_media_entity(struct dvb_device *dvbdev, |
184 | int type, int minor) | |
a0246e02 MCC |
185 | { |
186 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) | |
172e9d3c | 187 | int ret = 0, npads; |
a0246e02 | 188 | |
8211b187 MCC |
189 | switch (type) { |
190 | case DVB_DEVICE_FRONTEND: | |
191 | npads = 2; | |
192 | break; | |
193 | case DVB_DEVICE_DEMUX: | |
194 | npads = 2; | |
195 | break; | |
196 | case DVB_DEVICE_CA: | |
197 | npads = 2; | |
198 | break; | |
199 | case DVB_DEVICE_NET: | |
200 | /* | |
201 | * We should be creating entities for the MPE/ULE | |
202 | * decapsulation hardware (or software implementation). | |
203 | * | |
204 | * However, the number of for the MPE/ULE decaps may not be | |
205 | * fixed. As we don't have yet dynamic support for PADs at | |
206 | * the Media Controller, let's not create the decap | |
207 | * entities yet. | |
208 | */ | |
209 | return; | |
210 | default: | |
a0246e02 | 211 | return; |
8211b187 | 212 | } |
a0246e02 MCC |
213 | |
214 | dvbdev->entity = kzalloc(sizeof(*dvbdev->entity), GFP_KERNEL); | |
215 | if (!dvbdev->entity) | |
216 | return; | |
217 | ||
218 | dvbdev->entity->info.dev.major = DVB_MAJOR; | |
219 | dvbdev->entity->info.dev.minor = minor; | |
220 | dvbdev->entity->name = dvbdev->name; | |
172e9d3c | 221 | |
172e9d3c MCC |
222 | if (npads) { |
223 | dvbdev->pads = kcalloc(npads, sizeof(*dvbdev->pads), | |
224 | GFP_KERNEL); | |
225 | if (!dvbdev->pads) { | |
226 | kfree(dvbdev->entity); | |
227 | return; | |
228 | } | |
229 | } | |
230 | ||
a0246e02 MCC |
231 | switch (type) { |
232 | case DVB_DEVICE_FRONTEND: | |
233 | dvbdev->entity->type = MEDIA_ENT_T_DEVNODE_DVB_FE; | |
3bde1b78 MCC |
234 | dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; |
235 | dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE; | |
a0246e02 MCC |
236 | break; |
237 | case DVB_DEVICE_DEMUX: | |
238 | dvbdev->entity->type = MEDIA_ENT_T_DEVNODE_DVB_DEMUX; | |
3bde1b78 MCC |
239 | dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; |
240 | dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE; | |
a0246e02 | 241 | break; |
a0246e02 MCC |
242 | case DVB_DEVICE_CA: |
243 | dvbdev->entity->type = MEDIA_ENT_T_DEVNODE_DVB_CA; | |
3bde1b78 MCC |
244 | dvbdev->pads[0].flags = MEDIA_PAD_FL_SINK; |
245 | dvbdev->pads[1].flags = MEDIA_PAD_FL_SOURCE; | |
a0246e02 | 246 | break; |
a0246e02 MCC |
247 | default: |
248 | kfree(dvbdev->entity); | |
249 | dvbdev->entity = NULL; | |
250 | return; | |
251 | } | |
252 | ||
172e9d3c | 253 | if (npads) |
18095107 | 254 | ret = media_entity_init(dvbdev->entity, npads, dvbdev->pads); |
172e9d3c MCC |
255 | if (!ret) |
256 | ret = media_device_register_entity(dvbdev->adapter->mdev, | |
257 | dvbdev->entity); | |
a0246e02 MCC |
258 | if (ret < 0) { |
259 | printk(KERN_ERR | |
260 | "%s: media_device_register_entity failed for %s\n", | |
261 | __func__, dvbdev->entity->name); | |
172e9d3c | 262 | kfree(dvbdev->pads); |
a0246e02 MCC |
263 | kfree(dvbdev->entity); |
264 | dvbdev->entity = NULL; | |
265 | return; | |
266 | } | |
267 | ||
8211b187 | 268 | printk(KERN_DEBUG "%s: media entity '%s' registered.\n", |
a0246e02 MCC |
269 | __func__, dvbdev->entity->name); |
270 | #endif | |
271 | } | |
1da177e4 | 272 | |
8211b187 MCC |
273 | static void dvb_register_media_device(struct dvb_device *dvbdev, |
274 | int type, int minor) | |
275 | { | |
276 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) | |
277 | u32 intf_type; | |
278 | ||
279 | if (!dvbdev->adapter->mdev) | |
280 | return; | |
281 | ||
282 | dvb_create_media_entity(dvbdev, type, minor); | |
283 | ||
284 | switch (type) { | |
285 | case DVB_DEVICE_FRONTEND: | |
286 | intf_type = MEDIA_INTF_T_DVB_FE; | |
287 | break; | |
288 | case DVB_DEVICE_DEMUX: | |
289 | intf_type = MEDIA_INTF_T_DVB_DEMUX; | |
290 | break; | |
291 | case DVB_DEVICE_DVR: | |
292 | intf_type = MEDIA_INTF_T_DVB_DVR; | |
293 | break; | |
294 | case DVB_DEVICE_CA: | |
295 | intf_type = MEDIA_INTF_T_DVB_CA; | |
296 | break; | |
297 | case DVB_DEVICE_NET: | |
298 | intf_type = MEDIA_INTF_T_DVB_NET; | |
299 | break; | |
300 | default: | |
301 | return; | |
302 | } | |
303 | ||
304 | dvbdev->intf_devnode = media_devnode_create(dvbdev->adapter->mdev, | |
305 | intf_type, 0, | |
306 | DVB_MAJOR, minor, | |
307 | GFP_KERNEL); | |
308 | ||
309 | /* | |
310 | * Create the "obvious" link, e. g. the ones that represent | |
311 | * a direct association between an interface and an entity. | |
312 | * Other links should be created elsewhere, like: | |
313 | * DVB FE intf -> tuner | |
314 | * DVB demux intf -> dvr | |
315 | */ | |
316 | ||
317 | if (!dvbdev->entity || !dvbdev->intf_devnode) | |
318 | return; | |
319 | ||
320 | media_create_intf_link(dvbdev->entity, &dvbdev->intf_devnode->intf, 0); | |
321 | ||
322 | #endif | |
323 | } | |
324 | ||
1da177e4 LT |
325 | int dvb_register_device(struct dvb_adapter *adap, struct dvb_device **pdvbdev, |
326 | const struct dvb_device *template, void *priv, int type) | |
327 | { | |
328 | struct dvb_device *dvbdev; | |
b6190102 | 329 | struct file_operations *dvbdevfops; |
5f553388 | 330 | struct device *clsdev; |
5dd3f307 | 331 | int minor; |
1da177e4 LT |
332 | int id; |
333 | ||
c2788502 | 334 | mutex_lock(&dvbdev_register_lock); |
1da177e4 | 335 | |
b6190102 | 336 | if ((id = dvbdev_get_free_id (adap, type)) < 0){ |
1e4baed3 | 337 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 | 338 | *pdvbdev = NULL; |
46b4f7c1 | 339 | printk(KERN_ERR "%s: couldn't find free device id\n", __func__); |
1da177e4 LT |
340 | return -ENFILE; |
341 | } | |
342 | ||
343 | *pdvbdev = dvbdev = kmalloc(sizeof(struct dvb_device), GFP_KERNEL); | |
344 | ||
b6190102 MS |
345 | if (!dvbdev){ |
346 | mutex_unlock(&dvbdev_register_lock); | |
347 | return -ENOMEM; | |
348 | } | |
349 | ||
350 | dvbdevfops = kzalloc(sizeof(struct file_operations), GFP_KERNEL); | |
351 | ||
352 | if (!dvbdevfops){ | |
353 | kfree (dvbdev); | |
1e4baed3 | 354 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 LT |
355 | return -ENOMEM; |
356 | } | |
357 | ||
1da177e4 LT |
358 | memcpy(dvbdev, template, sizeof(struct dvb_device)); |
359 | dvbdev->type = type; | |
360 | dvbdev->id = id; | |
361 | dvbdev->adapter = adap; | |
362 | dvbdev->priv = priv; | |
b6190102 | 363 | dvbdev->fops = dvbdevfops; |
ca5be9cd | 364 | init_waitqueue_head (&dvbdev->wait_queue); |
1da177e4 | 365 | |
784e29d2 JE |
366 | memcpy(dvbdevfops, template->fops, sizeof(struct file_operations)); |
367 | dvbdevfops->owner = adap->module; | |
1da177e4 LT |
368 | |
369 | list_add_tail (&dvbdev->list_head, &adap->device_list); | |
370 | ||
5dd3f307 AO |
371 | down_write(&minor_rwsem); |
372 | #ifdef CONFIG_DVB_DYNAMIC_MINORS | |
373 | for (minor = 0; minor < MAX_DVB_MINORS; minor++) | |
374 | if (dvb_minors[minor] == NULL) | |
375 | break; | |
376 | ||
377 | if (minor == MAX_DVB_MINORS) { | |
378 | kfree(dvbdevfops); | |
379 | kfree(dvbdev); | |
82163edc | 380 | up_write(&minor_rwsem); |
5dd3f307 AO |
381 | mutex_unlock(&dvbdev_register_lock); |
382 | return -EINVAL; | |
383 | } | |
384 | #else | |
385 | minor = nums2minor(adap->num, type, id); | |
386 | #endif | |
387 | ||
388 | dvbdev->minor = minor; | |
389 | dvb_minors[minor] = dvbdev; | |
390 | up_write(&minor_rwsem); | |
391 | ||
f47f4763 AQ |
392 | mutex_unlock(&dvbdev_register_lock); |
393 | ||
a9b12619 | 394 | clsdev = device_create(dvb_class, adap->device, |
b7496780 | 395 | MKDEV(DVB_MAJOR, minor), |
a5f4c0ce | 396 | dvbdev, "dvb%d.%s%d", adap->num, dnames[type], id); |
4abdcf93 SA |
397 | if (IS_ERR(clsdev)) { |
398 | printk(KERN_ERR "%s: failed to create device dvb%d.%s%d (%ld)\n", | |
46b4f7c1 | 399 | __func__, adap->num, dnames[type], id, PTR_ERR(clsdev)); |
4abdcf93 SA |
400 | return PTR_ERR(clsdev); |
401 | } | |
900858ec | 402 | dprintk(KERN_DEBUG "DVB: register adapter%d/%s%d @ minor: %i (0x%02x)\n", |
5dd3f307 | 403 | adap->num, dnames[type], id, minor, minor); |
1da177e4 | 404 | |
a0246e02 MCC |
405 | dvb_register_media_device(dvbdev, type, minor); |
406 | ||
1da177e4 LT |
407 | return 0; |
408 | } | |
409 | EXPORT_SYMBOL(dvb_register_device); | |
410 | ||
411 | ||
412 | void dvb_unregister_device(struct dvb_device *dvbdev) | |
413 | { | |
414 | if (!dvbdev) | |
415 | return; | |
416 | ||
5dd3f307 AO |
417 | down_write(&minor_rwsem); |
418 | dvb_minors[dvbdev->minor] = NULL; | |
419 | up_write(&minor_rwsem); | |
420 | ||
421 | device_destroy(dvb_class, MKDEV(DVB_MAJOR, dvbdev->minor)); | |
1da177e4 | 422 | |
a0246e02 MCC |
423 | #if defined(CONFIG_MEDIA_CONTROLLER_DVB) |
424 | if (dvbdev->entity) { | |
425 | media_device_unregister_entity(dvbdev->entity); | |
426 | kfree(dvbdev->entity); | |
172e9d3c | 427 | kfree(dvbdev->pads); |
a0246e02 MCC |
428 | } |
429 | #endif | |
430 | ||
1da177e4 | 431 | list_del (&dvbdev->list_head); |
b6190102 | 432 | kfree (dvbdev->fops); |
1da177e4 LT |
433 | kfree (dvbdev); |
434 | } | |
435 | EXPORT_SYMBOL(dvb_unregister_device); | |
436 | ||
4155109a | 437 | |
4155109a | 438 | #ifdef CONFIG_MEDIA_CONTROLLER_DVB |
480884b6 MCC |
439 | void dvb_create_media_graph(struct dvb_adapter *adap) |
440 | { | |
441 | struct media_device *mdev = adap->mdev; | |
4155109a MCC |
442 | struct media_entity *entity, *tuner = NULL, *fe = NULL; |
443 | struct media_entity *demux = NULL, *dvr = NULL, *ca = NULL; | |
8ddb90d2 | 444 | struct media_interface *intf; |
4155109a MCC |
445 | |
446 | if (!mdev) | |
447 | return; | |
448 | ||
449 | media_device_for_each_entity(entity, mdev) { | |
450 | switch (entity->type) { | |
451 | case MEDIA_ENT_T_V4L2_SUBDEV_TUNER: | |
452 | tuner = entity; | |
453 | break; | |
454 | case MEDIA_ENT_T_DEVNODE_DVB_FE: | |
455 | fe = entity; | |
456 | break; | |
457 | case MEDIA_ENT_T_DEVNODE_DVB_DEMUX: | |
458 | demux = entity; | |
459 | break; | |
460 | case MEDIA_ENT_T_DEVNODE_DVB_DVR: | |
461 | dvr = entity; | |
462 | break; | |
463 | case MEDIA_ENT_T_DEVNODE_DVB_CA: | |
464 | ca = entity; | |
465 | break; | |
466 | } | |
467 | } | |
468 | ||
469 | if (tuner && fe) | |
8df00a15 | 470 | media_create_pad_link(tuner, 0, fe, 0, 0); |
4155109a MCC |
471 | |
472 | if (fe && demux) | |
8df00a15 | 473 | media_create_pad_link(fe, 1, demux, 0, MEDIA_LNK_FL_ENABLED); |
4155109a MCC |
474 | |
475 | if (demux && dvr) | |
8df00a15 | 476 | media_create_pad_link(demux, 1, dvr, 0, MEDIA_LNK_FL_ENABLED); |
4155109a MCC |
477 | |
478 | if (demux && ca) | |
8df00a15 | 479 | media_create_pad_link(demux, 1, ca, 0, MEDIA_LNK_FL_ENABLED); |
8ddb90d2 MCC |
480 | |
481 | /* Create indirect interface links for FE->tuner, DVR->demux and CA->ca */ | |
482 | list_for_each_entry(intf, &mdev->interfaces, list) { | |
483 | if (intf->type == MEDIA_INTF_T_DVB_CA && ca) | |
484 | media_create_intf_link(ca, intf, 0); | |
485 | if (intf->type == MEDIA_INTF_T_DVB_FE && tuner) | |
486 | media_create_intf_link(tuner, intf, 0); | |
487 | if (intf->type == MEDIA_INTF_T_DVB_DVR && demux) | |
488 | media_create_intf_link(demux, intf, 0); | |
489 | } | |
4155109a MCC |
490 | } |
491 | EXPORT_SYMBOL_GPL(dvb_create_media_graph); | |
480884b6 | 492 | #endif |
4155109a | 493 | |
78e92006 JG |
494 | static int dvbdev_check_free_adapter_num(int num) |
495 | { | |
496 | struct list_head *entry; | |
497 | list_for_each(entry, &dvb_adapter_list) { | |
498 | struct dvb_adapter *adap; | |
499 | adap = list_entry(entry, struct dvb_adapter, list_head); | |
500 | if (adap->num == num) | |
501 | return 0; | |
502 | } | |
503 | return 1; | |
504 | } | |
1da177e4 LT |
505 | |
506 | static int dvbdev_get_free_adapter_num (void) | |
507 | { | |
508 | int num = 0; | |
509 | ||
510 | while (num < DVB_MAX_ADAPTERS) { | |
78e92006 JG |
511 | if (dvbdev_check_free_adapter_num(num)) |
512 | return num; | |
1da177e4 LT |
513 | num++; |
514 | } | |
515 | ||
516 | return -ENFILE; | |
517 | } | |
518 | ||
519 | ||
78e92006 JG |
520 | int dvb_register_adapter(struct dvb_adapter *adap, const char *name, |
521 | struct module *module, struct device *device, | |
522 | short *adapter_nums) | |
1da177e4 | 523 | { |
78e92006 | 524 | int i, num; |
1da177e4 | 525 | |
c2788502 | 526 | mutex_lock(&dvbdev_register_lock); |
1da177e4 | 527 | |
78e92006 JG |
528 | for (i = 0; i < DVB_MAX_ADAPTERS; ++i) { |
529 | num = adapter_nums[i]; | |
530 | if (num >= 0 && num < DVB_MAX_ADAPTERS) { | |
531 | /* use the one the driver asked for */ | |
532 | if (dvbdev_check_free_adapter_num(num)) | |
533 | break; | |
534 | } else { | |
535 | num = dvbdev_get_free_adapter_num(); | |
536 | break; | |
537 | } | |
538 | num = -1; | |
539 | } | |
540 | ||
541 | if (num < 0) { | |
1e4baed3 | 542 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 LT |
543 | return -ENFILE; |
544 | } | |
545 | ||
1da177e4 LT |
546 | memset (adap, 0, sizeof(struct dvb_adapter)); |
547 | INIT_LIST_HEAD (&adap->device_list); | |
548 | ||
900858ec | 549 | printk(KERN_INFO "DVB: registering new adapter (%s)\n", name); |
1da177e4 | 550 | |
1da177e4 LT |
551 | adap->num = num; |
552 | adap->name = name; | |
553 | adap->module = module; | |
d09dbf92 | 554 | adap->device = device; |
59b1842d DB |
555 | adap->mfe_shared = 0; |
556 | adap->mfe_dvbdev = NULL; | |
557 | mutex_init (&adap->mfe_lock); | |
1da177e4 LT |
558 | |
559 | list_add_tail (&adap->list_head, &dvb_adapter_list); | |
560 | ||
1e4baed3 | 561 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 LT |
562 | |
563 | return num; | |
564 | } | |
565 | EXPORT_SYMBOL(dvb_register_adapter); | |
566 | ||
567 | ||
568 | int dvb_unregister_adapter(struct dvb_adapter *adap) | |
569 | { | |
c2788502 | 570 | mutex_lock(&dvbdev_register_lock); |
1da177e4 | 571 | list_del (&adap->list_head); |
1e4baed3 | 572 | mutex_unlock(&dvbdev_register_lock); |
1da177e4 LT |
573 | return 0; |
574 | } | |
575 | EXPORT_SYMBOL(dvb_unregister_adapter); | |
576 | ||
577 | /* if the miracle happens and "generic_usercopy()" is included into | |
578 | the kernel, then this can vanish. please don't make the mistake and | |
579 | define this as video_usercopy(). this will introduce a dependecy | |
580 | to the v4l "videodev.o" module, which is unnecessary for some | |
581 | cards (ie. the budget dvb-cards don't need the v4l module...) */ | |
16ef8def | 582 | int dvb_usercopy(struct file *file, |
afd1a0c9 | 583 | unsigned int cmd, unsigned long arg, |
16ef8def | 584 | int (*func)(struct file *file, |
1da177e4 LT |
585 | unsigned int cmd, void *arg)) |
586 | { | |
afd1a0c9 MCC |
587 | char sbuf[128]; |
588 | void *mbuf = NULL; | |
589 | void *parg = NULL; | |
590 | int err = -EINVAL; | |
591 | ||
592 | /* Copy arguments into temp kernel buffer */ | |
593 | switch (_IOC_DIR(cmd)) { | |
594 | case _IOC_NONE: | |
1da177e4 LT |
595 | /* |
596 | * For this command, the pointer is actually an integer | |
597 | * argument. | |
598 | */ | |
599 | parg = (void *) arg; | |
600 | break; | |
afd1a0c9 MCC |
601 | case _IOC_READ: /* some v4l ioctls are marked wrong ... */ |
602 | case _IOC_WRITE: | |
603 | case (_IOC_WRITE | _IOC_READ): | |
604 | if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { | |
50c25fff | 605 | parg = sbuf; |
afd1a0c9 | 606 | } else { |
50c25fff MK |
607 | /* too big to allocate from stack */ |
608 | mbuf = kmalloc(_IOC_SIZE(cmd),GFP_KERNEL); | |
609 | if (NULL == mbuf) | |
610 | return -ENOMEM; | |
611 | parg = mbuf; | |
afd1a0c9 MCC |
612 | } |
613 | ||
614 | err = -EFAULT; | |
615 | if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd))) | |
50c25fff | 616 | goto out; |
afd1a0c9 MCC |
617 | break; |
618 | } | |
619 | ||
620 | /* call driver */ | |
16ef8def | 621 | if ((err = func(file, cmd, parg)) == -ENOIOCTLCMD) |
d9751fd0 | 622 | err = -ENOTTY; |
afd1a0c9 MCC |
623 | |
624 | if (err < 0) | |
625 | goto out; | |
626 | ||
627 | /* Copy results into user buffer */ | |
628 | switch (_IOC_DIR(cmd)) | |
629 | { | |
630 | case _IOC_READ: | |
631 | case (_IOC_WRITE | _IOC_READ): | |
632 | if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) | |
50c25fff | 633 | err = -EFAULT; |
afd1a0c9 MCC |
634 | break; |
635 | } | |
1da177e4 LT |
636 | |
637 | out: | |
afd1a0c9 MCC |
638 | kfree(mbuf); |
639 | return err; | |
1da177e4 LT |
640 | } |
641 | ||
a5f4c0ce KS |
642 | static int dvb_uevent(struct device *dev, struct kobj_uevent_env *env) |
643 | { | |
644 | struct dvb_device *dvbdev = dev_get_drvdata(dev); | |
645 | ||
a5f4c0ce | 646 | add_uevent_var(env, "DVB_ADAPTER_NUM=%d", dvbdev->adapter->num); |
763d19bb KS |
647 | add_uevent_var(env, "DVB_DEVICE_TYPE=%s", dnames[dvbdev->type]); |
648 | add_uevent_var(env, "DVB_DEVICE_NUM=%d", dvbdev->id); | |
a5f4c0ce KS |
649 | return 0; |
650 | } | |
651 | ||
2c9ede55 | 652 | static char *dvb_devnode(struct device *dev, umode_t *mode) |
8a8bdcc7 KS |
653 | { |
654 | struct dvb_device *dvbdev = dev_get_drvdata(dev); | |
655 | ||
656 | return kasprintf(GFP_KERNEL, "dvb/adapter%d/%s%d", | |
657 | dvbdev->adapter->num, dnames[dvbdev->type], dvbdev->id); | |
658 | } | |
659 | ||
660 | ||
1da177e4 LT |
661 | static int __init init_dvbdev(void) |
662 | { | |
663 | int retval; | |
664 | dev_t dev = MKDEV(DVB_MAJOR, 0); | |
665 | ||
666 | if ((retval = register_chrdev_region(dev, MAX_DVB_MINORS, "DVB")) != 0) { | |
900858ec | 667 | printk(KERN_ERR "dvb-core: unable to get major %d\n", DVB_MAJOR); |
1da177e4 LT |
668 | return retval; |
669 | } | |
670 | ||
671 | cdev_init(&dvb_device_cdev, &dvb_device_fops); | |
672 | if ((retval = cdev_add(&dvb_device_cdev, dev, MAX_DVB_MINORS)) != 0) { | |
900858ec | 673 | printk(KERN_ERR "dvb-core: unable register character device\n"); |
1da177e4 LT |
674 | goto error; |
675 | } | |
676 | ||
56b22935 | 677 | dvb_class = class_create(THIS_MODULE, "dvb"); |
1da177e4 LT |
678 | if (IS_ERR(dvb_class)) { |
679 | retval = PTR_ERR(dvb_class); | |
680 | goto error; | |
681 | } | |
a5f4c0ce | 682 | dvb_class->dev_uevent = dvb_uevent; |
e454cea2 | 683 | dvb_class->devnode = dvb_devnode; |
1da177e4 LT |
684 | return 0; |
685 | ||
686 | error: | |
687 | cdev_del(&dvb_device_cdev); | |
688 | unregister_chrdev_region(dev, MAX_DVB_MINORS); | |
689 | return retval; | |
690 | } | |
691 | ||
692 | ||
693 | static void __exit exit_dvbdev(void) | |
694 | { | |
56b22935 | 695 | class_destroy(dvb_class); |
1da177e4 | 696 | cdev_del(&dvb_device_cdev); |
afd1a0c9 | 697 | unregister_chrdev_region(MKDEV(DVB_MAJOR, 0), MAX_DVB_MINORS); |
1da177e4 LT |
698 | } |
699 | ||
4abdcf93 | 700 | subsys_initcall(init_dvbdev); |
1da177e4 LT |
701 | module_exit(exit_dvbdev); |
702 | ||
703 | MODULE_DESCRIPTION("DVB Core Driver"); | |
704 | MODULE_AUTHOR("Marcus Metzler, Ralph Metzler, Holger Waechtler"); | |
705 | MODULE_LICENSE("GPL"); |