Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * |
3 | * some helper function for simple DVB cards which simply DMA the | |
4 | * complete transport stream and let the computer sort everything else | |
5 | * (i.e. we are using the software demux, ...). Also uses the | |
6 | * video-buf to manage DMA buffers. | |
7 | * | |
8 | * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SUSE Labs] | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or | |
13 | * (at your option) any later version. | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/init.h> | |
18 | #include <linux/device.h> | |
19 | #include <linux/fs.h> | |
20 | #include <linux/kthread.h> | |
21 | #include <linux/file.h> | |
59d34489 | 22 | |
7dfb7103 | 23 | #include <linux/freezer.h> |
1da177e4 | 24 | |
59d34489 | 25 | #include <media/videobuf-core.h> |
ba366a23 | 26 | #include <media/videobuf-dvb.h> |
1da177e4 LT |
27 | |
28 | /* ------------------------------------------------------------------ */ | |
29 | ||
30 | MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]"); | |
31 | MODULE_LICENSE("GPL"); | |
32 | ||
ff699e6b | 33 | static unsigned int debug; |
1da177e4 LT |
34 | module_param(debug, int, 0644); |
35 | MODULE_PARM_DESC(debug,"enable debug messages"); | |
36 | ||
37 | #define dprintk(fmt, arg...) if (debug) \ | |
38 | printk(KERN_DEBUG "%s/dvb: " fmt, dvb->name , ## arg) | |
39 | ||
40 | /* ------------------------------------------------------------------ */ | |
41 | ||
42 | static int videobuf_dvb_thread(void *data) | |
43 | { | |
44 | struct videobuf_dvb *dvb = data; | |
45 | struct videobuf_buffer *buf; | |
46 | unsigned long flags; | |
47 | int err; | |
59d34489 | 48 | void *outp; |
1da177e4 LT |
49 | |
50 | dprintk("dvb thread started\n"); | |
83144186 | 51 | set_freezable(); |
1da177e4 LT |
52 | videobuf_read_start(&dvb->dvbq); |
53 | ||
54 | for (;;) { | |
55 | /* fetch next buffer */ | |
56 | buf = list_entry(dvb->dvbq.stream.next, | |
57 | struct videobuf_buffer, stream); | |
58 | list_del(&buf->stream); | |
59 | err = videobuf_waiton(buf,0,1); | |
1da177e4 LT |
60 | |
61 | /* no more feeds left or stop_feed() asked us to quit */ | |
62 | if (0 == dvb->nfeeds) | |
63 | break; | |
64 | if (kthread_should_stop()) | |
65 | break; | |
3e1d1d28 | 66 | try_to_freeze(); |
1da177e4 LT |
67 | |
68 | /* feed buffer data to demux */ | |
59d34489 MCC |
69 | outp = videobuf_queue_to_vmalloc (&dvb->dvbq, buf); |
70 | ||
0fc0686e | 71 | if (buf->state == VIDEOBUF_DONE) |
59d34489 | 72 | dvb_dmx_swfilter(&dvb->demux, outp, |
1da177e4 LT |
73 | buf->size); |
74 | ||
75 | /* requeue buffer */ | |
76 | list_add_tail(&buf->stream,&dvb->dvbq.stream); | |
77 | spin_lock_irqsave(dvb->dvbq.irqlock,flags); | |
78 | dvb->dvbq.ops->buf_queue(&dvb->dvbq,buf); | |
79 | spin_unlock_irqrestore(dvb->dvbq.irqlock,flags); | |
80 | } | |
81 | ||
82 | videobuf_read_stop(&dvb->dvbq); | |
83 | dprintk("dvb thread stopped\n"); | |
84 | ||
85 | /* Hmm, linux becomes *very* unhappy without this ... */ | |
86 | while (!kthread_should_stop()) { | |
87 | set_current_state(TASK_INTERRUPTIBLE); | |
88 | schedule(); | |
89 | } | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static int videobuf_dvb_start_feed(struct dvb_demux_feed *feed) | |
94 | { | |
95 | struct dvb_demux *demux = feed->demux; | |
96 | struct videobuf_dvb *dvb = demux->priv; | |
97 | int rc; | |
98 | ||
99 | if (!demux->dmx.frontend) | |
100 | return -EINVAL; | |
101 | ||
3593cab5 | 102 | mutex_lock(&dvb->lock); |
1da177e4 LT |
103 | dvb->nfeeds++; |
104 | rc = dvb->nfeeds; | |
105 | ||
106 | if (NULL != dvb->thread) | |
107 | goto out; | |
108 | dvb->thread = kthread_run(videobuf_dvb_thread, | |
109 | dvb, "%s dvb", dvb->name); | |
110 | if (IS_ERR(dvb->thread)) { | |
111 | rc = PTR_ERR(dvb->thread); | |
112 | dvb->thread = NULL; | |
113 | } | |
114 | ||
115 | out: | |
3593cab5 | 116 | mutex_unlock(&dvb->lock); |
1da177e4 LT |
117 | return rc; |
118 | } | |
119 | ||
120 | static int videobuf_dvb_stop_feed(struct dvb_demux_feed *feed) | |
121 | { | |
122 | struct dvb_demux *demux = feed->demux; | |
123 | struct videobuf_dvb *dvb = demux->priv; | |
124 | int err = 0; | |
125 | ||
3593cab5 | 126 | mutex_lock(&dvb->lock); |
1da177e4 LT |
127 | dvb->nfeeds--; |
128 | if (0 == dvb->nfeeds && NULL != dvb->thread) { | |
1da177e4 LT |
129 | err = kthread_stop(dvb->thread); |
130 | dvb->thread = NULL; | |
131 | } | |
3593cab5 | 132 | mutex_unlock(&dvb->lock); |
1da177e4 LT |
133 | return err; |
134 | } | |
135 | ||
dcadd082 | 136 | static int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe, |
1da177e4 | 137 | struct module *module, |
d09dbf92 | 138 | void *adapter_priv, |
78e92006 | 139 | struct device *device, |
363c35fc | 140 | char *adapter_name, |
59b1842d DB |
141 | short *adapter_nr, |
142 | int mfe_shared) | |
1da177e4 LT |
143 | { |
144 | int result; | |
145 | ||
363c35fc | 146 | mutex_init(&fe->lock); |
1da177e4 LT |
147 | |
148 | /* register adapter */ | |
11fbedd3 ST |
149 | result = dvb_register_adapter(&fe->adapter, adapter_name, module, |
150 | device, adapter_nr); | |
1da177e4 LT |
151 | if (result < 0) { |
152 | printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n", | |
363c35fc | 153 | adapter_name, result); |
1da177e4 | 154 | } |
363c35fc | 155 | fe->adapter.priv = adapter_priv; |
59b1842d | 156 | fe->adapter.mfe_shared = mfe_shared; |
363c35fc ST |
157 | |
158 | return result; | |
159 | } | |
160 | ||
dcadd082 | 161 | static int videobuf_dvb_register_frontend(struct dvb_adapter *adapter, |
11fbedd3 | 162 | struct videobuf_dvb *dvb) |
363c35fc ST |
163 | { |
164 | int result; | |
1da177e4 LT |
165 | |
166 | /* register frontend */ | |
363c35fc | 167 | result = dvb_register_frontend(adapter, dvb->frontend); |
1da177e4 LT |
168 | if (result < 0) { |
169 | printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n", | |
170 | dvb->name, result); | |
171 | goto fail_frontend; | |
172 | } | |
173 | ||
174 | /* register demux stuff */ | |
175 | dvb->demux.dmx.capabilities = | |
176 | DMX_TS_FILTERING | DMX_SECTION_FILTERING | | |
177 | DMX_MEMORY_BASED_FILTERING; | |
178 | dvb->demux.priv = dvb; | |
179 | dvb->demux.filternum = 256; | |
180 | dvb->demux.feednum = 256; | |
181 | dvb->demux.start_feed = videobuf_dvb_start_feed; | |
182 | dvb->demux.stop_feed = videobuf_dvb_stop_feed; | |
183 | result = dvb_dmx_init(&dvb->demux); | |
184 | if (result < 0) { | |
185 | printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n", | |
186 | dvb->name, result); | |
187 | goto fail_dmx; | |
188 | } | |
189 | ||
190 | dvb->dmxdev.filternum = 256; | |
191 | dvb->dmxdev.demux = &dvb->demux.dmx; | |
192 | dvb->dmxdev.capabilities = 0; | |
363c35fc ST |
193 | result = dvb_dmxdev_init(&dvb->dmxdev, adapter); |
194 | ||
1da177e4 LT |
195 | if (result < 0) { |
196 | printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n", | |
197 | dvb->name, result); | |
198 | goto fail_dmxdev; | |
199 | } | |
200 | ||
201 | dvb->fe_hw.source = DMX_FRONTEND_0; | |
202 | result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
203 | if (result < 0) { | |
204 | printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n", | |
205 | dvb->name, result); | |
206 | goto fail_fe_hw; | |
207 | } | |
208 | ||
209 | dvb->fe_mem.source = DMX_MEMORY_FE; | |
210 | result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem); | |
211 | if (result < 0) { | |
212 | printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n", | |
213 | dvb->name, result); | |
214 | goto fail_fe_mem; | |
215 | } | |
216 | ||
217 | result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
218 | if (result < 0) { | |
219 | printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n", | |
220 | dvb->name, result); | |
221 | goto fail_fe_conn; | |
222 | } | |
223 | ||
224 | /* register network adapter */ | |
363c35fc | 225 | dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx); |
e43f3fab DB |
226 | if (dvb->net.dvbdev == NULL) { |
227 | result = -ENOMEM; | |
228 | goto fail_fe_conn; | |
229 | } | |
1da177e4 LT |
230 | return 0; |
231 | ||
232 | fail_fe_conn: | |
233 | dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem); | |
234 | fail_fe_mem: | |
235 | dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
236 | fail_fe_hw: | |
237 | dvb_dmxdev_release(&dvb->dmxdev); | |
238 | fail_dmxdev: | |
239 | dvb_dmx_release(&dvb->demux); | |
240 | fail_dmx: | |
241 | dvb_unregister_frontend(dvb->frontend); | |
242 | fail_frontend: | |
f52a838b | 243 | dvb_frontend_detach(dvb->frontend); |
e43f3fab | 244 | dvb->frontend = NULL; |
363c35fc | 245 | |
1da177e4 LT |
246 | return result; |
247 | } | |
248 | ||
dcadd082 MCC |
249 | /* ------------------------------------------------------------------ */ |
250 | /* Register a single adapter and one or more frontends */ | |
251 | int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f, | |
252 | struct module *module, | |
253 | void *adapter_priv, | |
254 | struct device *device, | |
255 | short *adapter_nr, | |
256 | int mfe_shared) | |
257 | { | |
258 | struct list_head *list, *q; | |
259 | struct videobuf_dvb_frontend *fe; | |
260 | int res; | |
261 | ||
262 | fe = videobuf_dvb_get_frontend(f, 1); | |
263 | if (!fe) { | |
264 | printk(KERN_WARNING "Unable to register the adapter which has no frontends\n"); | |
265 | return -EINVAL; | |
266 | } | |
267 | ||
268 | /* Bring up the adapter */ | |
269 | res = videobuf_dvb_register_adapter(f, module, adapter_priv, device, | |
270 | fe->dvb.name, adapter_nr, mfe_shared); | |
271 | if (res < 0) { | |
272 | printk(KERN_WARNING "videobuf_dvb_register_adapter failed (errno = %d)\n", res); | |
273 | return res; | |
274 | } | |
275 | ||
276 | /* Attach all of the frontends to the adapter */ | |
277 | mutex_lock(&f->lock); | |
278 | list_for_each_safe(list, q, &f->felist) { | |
279 | fe = list_entry(list, struct videobuf_dvb_frontend, felist); | |
280 | res = videobuf_dvb_register_frontend(&f->adapter, &fe->dvb); | |
281 | if (res < 0) { | |
282 | printk(KERN_WARNING "%s: videobuf_dvb_register_frontend failed (errno = %d)\n", | |
283 | fe->dvb.name, res); | |
284 | goto err; | |
285 | } | |
286 | } | |
287 | mutex_unlock(&f->lock); | |
288 | return 0; | |
289 | ||
290 | err: | |
291 | mutex_unlock(&f->lock); | |
292 | videobuf_dvb_unregister_bus(f); | |
293 | return res; | |
294 | } | |
295 | EXPORT_SYMBOL(videobuf_dvb_register_bus); | |
296 | ||
363c35fc | 297 | void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f) |
1da177e4 | 298 | { |
878595f6 | 299 | videobuf_dvb_dealloc_frontends(f); |
363c35fc ST |
300 | |
301 | dvb_unregister_adapter(&f->adapter); | |
302 | } | |
11fbedd3 | 303 | EXPORT_SYMBOL(videobuf_dvb_unregister_bus); |
363c35fc | 304 | |
11fbedd3 ST |
305 | struct videobuf_dvb_frontend *videobuf_dvb_get_frontend( |
306 | struct videobuf_dvb_frontends *f, int id) | |
363c35fc ST |
307 | { |
308 | struct list_head *list, *q; | |
309 | struct videobuf_dvb_frontend *fe, *ret = NULL; | |
310 | ||
311 | mutex_lock(&f->lock); | |
312 | ||
7bdf84fc | 313 | list_for_each_safe(list, q, &f->felist) { |
363c35fc ST |
314 | fe = list_entry(list, struct videobuf_dvb_frontend, felist); |
315 | if (fe->id == id) { | |
316 | ret = fe; | |
317 | break; | |
318 | } | |
319 | } | |
320 | ||
321 | mutex_unlock(&f->lock); | |
322 | ||
323 | return ret; | |
324 | } | |
11fbedd3 | 325 | EXPORT_SYMBOL(videobuf_dvb_get_frontend); |
363c35fc | 326 | |
11fbedd3 ST |
327 | int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends *f, |
328 | struct dvb_frontend *p) | |
363c35fc ST |
329 | { |
330 | struct list_head *list, *q; | |
331 | struct videobuf_dvb_frontend *fe = NULL; | |
332 | int ret = 0; | |
333 | ||
334 | mutex_lock(&f->lock); | |
335 | ||
7bdf84fc | 336 | list_for_each_safe(list, q, &f->felist) { |
363c35fc ST |
337 | fe = list_entry(list, struct videobuf_dvb_frontend, felist); |
338 | if (fe->dvb.frontend == p) { | |
339 | ret = fe->id; | |
340 | break; | |
341 | } | |
342 | } | |
343 | ||
344 | mutex_unlock(&f->lock); | |
345 | ||
346 | return ret; | |
347 | } | |
11fbedd3 | 348 | EXPORT_SYMBOL(videobuf_dvb_find_frontend); |
363c35fc | 349 | |
11fbedd3 ST |
350 | struct videobuf_dvb_frontend *videobuf_dvb_alloc_frontend( |
351 | struct videobuf_dvb_frontends *f, int id) | |
363c35fc ST |
352 | { |
353 | struct videobuf_dvb_frontend *fe; | |
354 | ||
11fbedd3 | 355 | fe = kzalloc(sizeof(struct videobuf_dvb_frontend), GFP_KERNEL); |
363c35fc ST |
356 | if (fe == NULL) |
357 | goto fail_alloc; | |
358 | ||
363c35fc ST |
359 | fe->id = id; |
360 | mutex_init(&fe->dvb.lock); | |
361 | ||
362 | mutex_lock(&f->lock); | |
11fbedd3 | 363 | list_add_tail(&fe->felist, &f->felist); |
363c35fc ST |
364 | mutex_unlock(&f->lock); |
365 | ||
366 | fail_alloc: | |
367 | return fe; | |
1da177e4 | 368 | } |
363c35fc | 369 | EXPORT_SYMBOL(videobuf_dvb_alloc_frontend); |
878595f6 DB |
370 | |
371 | void videobuf_dvb_dealloc_frontends(struct videobuf_dvb_frontends *f) | |
372 | { | |
373 | struct list_head *list, *q; | |
374 | struct videobuf_dvb_frontend *fe; | |
375 | ||
376 | mutex_lock(&f->lock); | |
377 | list_for_each_safe(list, q, &f->felist) { | |
378 | fe = list_entry(list, struct videobuf_dvb_frontend, felist); | |
379 | if (fe->dvb.net.dvbdev) { | |
380 | dvb_net_release(&fe->dvb.net); | |
381 | fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, | |
382 | &fe->dvb.fe_mem); | |
383 | fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, | |
384 | &fe->dvb.fe_hw); | |
385 | dvb_dmxdev_release(&fe->dvb.dmxdev); | |
386 | dvb_dmx_release(&fe->dvb.demux); | |
387 | dvb_unregister_frontend(fe->dvb.frontend); | |
388 | } | |
389 | if (fe->dvb.frontend) | |
390 | /* always allocated, may have been reset */ | |
391 | dvb_frontend_detach(fe->dvb.frontend); | |
392 | list_del(list); /* remove list entry */ | |
393 | kfree(fe); /* free frontend allocation */ | |
394 | } | |
395 | mutex_unlock(&f->lock); | |
396 | } | |
397 | EXPORT_SYMBOL(videobuf_dvb_dealloc_frontends); |