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.
8 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SUSE Labs]
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.
16 #include <linux/module.h>
17 #include <linux/init.h>
18 #include <linux/device.h>
20 #include <linux/kthread.h>
21 #include <linux/file.h>
23 #include <linux/freezer.h>
25 #include <media/videobuf-core.h>
26 #include <media/videobuf-dvb.h>
28 /* ------------------------------------------------------------------ */
30 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
31 MODULE_LICENSE("GPL");
33 static unsigned int debug;
34 module_param(debug, int, 0644);
35 MODULE_PARM_DESC(debug,"enable debug messages");
37 #define dprintk(fmt, arg...) if (debug) \
38 printk(KERN_DEBUG "%s/dvb: " fmt, dvb->name , ## arg)
40 /* ------------------------------------------------------------------ */
42 static int videobuf_dvb_thread(void *data)
44 struct videobuf_dvb *dvb = data;
45 struct videobuf_buffer *buf;
50 dprintk("dvb thread started\n");
52 videobuf_read_start(&dvb->dvbq);
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);
61 /* no more feeds left or stop_feed() asked us to quit */
64 if (kthread_should_stop())
68 /* feed buffer data to demux */
69 outp = videobuf_queue_to_vmalloc (&dvb->dvbq, buf);
71 if (buf->state == VIDEOBUF_DONE)
72 dvb_dmx_swfilter(&dvb->demux, outp,
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);
82 videobuf_read_stop(&dvb->dvbq);
83 dprintk("dvb thread stopped\n");
85 /* Hmm, linux becomes *very* unhappy without this ... */
86 while (!kthread_should_stop()) {
87 set_current_state(TASK_INTERRUPTIBLE);
93 static int videobuf_dvb_start_feed(struct dvb_demux_feed *feed)
95 struct dvb_demux *demux = feed->demux;
96 struct videobuf_dvb *dvb = demux->priv;
99 if (!demux->dmx.frontend)
102 mutex_lock(&dvb->lock);
106 if (NULL != dvb->thread)
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);
116 mutex_unlock(&dvb->lock);
120 static int videobuf_dvb_stop_feed(struct dvb_demux_feed *feed)
122 struct dvb_demux *demux = feed->demux;
123 struct videobuf_dvb *dvb = demux->priv;
126 mutex_lock(&dvb->lock);
128 if (0 == dvb->nfeeds && NULL != dvb->thread) {
129 err = kthread_stop(dvb->thread);
132 mutex_unlock(&dvb->lock);
136 /* ------------------------------------------------------------------ */
137 /* Register a single adapter and one or more frontends */
138 int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f,
139 struct module *module,
141 struct device *device,
145 struct list_head *list, *q;
146 struct videobuf_dvb_frontend *fe;
149 fe = videobuf_dvb_get_frontend(f, 1);
151 printk(KERN_WARNING "Unable to register the adapter which has no frontends\n");
155 /* Bring up the adapter */
156 res = videobuf_dvb_register_adapter(f, module, adapter_priv, device,
157 fe->dvb.name, adapter_nr, mfe_shared);
159 printk(KERN_WARNING "videobuf_dvb_register_adapter failed (errno = %d)\n", res);
163 /* Attach all of the frontends to the adapter */
164 mutex_lock(&f->lock);
165 list_for_each_safe(list, q, &f->felist) {
166 fe = list_entry(list, struct videobuf_dvb_frontend, felist);
167 res = videobuf_dvb_register_frontend(&f->adapter, &fe->dvb);
169 printk(KERN_WARNING "%s: videobuf_dvb_register_frontend failed (errno = %d)\n",
174 mutex_unlock(&f->lock);
178 mutex_unlock(&f->lock);
179 videobuf_dvb_unregister_bus(f);
182 EXPORT_SYMBOL(videobuf_dvb_register_bus);
184 int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe,
185 struct module *module,
187 struct device *device,
194 mutex_init(&fe->lock);
196 /* register adapter */
197 result = dvb_register_adapter(&fe->adapter, adapter_name, module,
200 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
201 adapter_name, result);
203 fe->adapter.priv = adapter_priv;
204 fe->adapter.mfe_shared = mfe_shared;
209 int videobuf_dvb_register_frontend(struct dvb_adapter *adapter,
210 struct videobuf_dvb *dvb)
214 /* register frontend */
215 result = dvb_register_frontend(adapter, dvb->frontend);
217 printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
222 /* register demux stuff */
223 dvb->demux.dmx.capabilities =
224 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
225 DMX_MEMORY_BASED_FILTERING;
226 dvb->demux.priv = dvb;
227 dvb->demux.filternum = 256;
228 dvb->demux.feednum = 256;
229 dvb->demux.start_feed = videobuf_dvb_start_feed;
230 dvb->demux.stop_feed = videobuf_dvb_stop_feed;
231 result = dvb_dmx_init(&dvb->demux);
233 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
238 dvb->dmxdev.filternum = 256;
239 dvb->dmxdev.demux = &dvb->demux.dmx;
240 dvb->dmxdev.capabilities = 0;
241 result = dvb_dmxdev_init(&dvb->dmxdev, adapter);
244 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
249 dvb->fe_hw.source = DMX_FRONTEND_0;
250 result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
252 printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
257 dvb->fe_mem.source = DMX_MEMORY_FE;
258 result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
260 printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
265 result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
267 printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
272 /* register network adapter */
273 dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);
274 if (dvb->net.dvbdev == NULL) {
281 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
283 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
285 dvb_dmxdev_release(&dvb->dmxdev);
287 dvb_dmx_release(&dvb->demux);
289 dvb_unregister_frontend(dvb->frontend);
291 dvb_frontend_detach(dvb->frontend);
292 dvb->frontend = NULL;
297 void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f)
299 struct list_head *list, *q;
300 struct videobuf_dvb_frontend *fe;
302 mutex_lock(&f->lock);
303 list_for_each_safe(list, q, &f->felist) {
304 fe = list_entry(list, struct videobuf_dvb_frontend, felist);
305 if (fe->dvb.net.dvbdev) {
306 dvb_net_release(&fe->dvb.net);
307 fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
309 fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
311 dvb_dmxdev_release(&fe->dvb.dmxdev);
312 dvb_dmx_release(&fe->dvb.demux);
313 dvb_unregister_frontend(fe->dvb.frontend);
315 if (fe->dvb.frontend)
316 /* always allocated, may have been reset */
317 dvb_frontend_detach(fe->dvb.frontend);
321 mutex_unlock(&f->lock);
323 dvb_unregister_adapter(&f->adapter);
325 EXPORT_SYMBOL(videobuf_dvb_unregister_bus);
327 struct videobuf_dvb_frontend *videobuf_dvb_get_frontend(
328 struct videobuf_dvb_frontends *f, int id)
330 struct list_head *list, *q;
331 struct videobuf_dvb_frontend *fe, *ret = NULL;
333 mutex_lock(&f->lock);
335 list_for_each_safe(list, q, &f->felist) {
336 fe = list_entry(list, struct videobuf_dvb_frontend, felist);
343 mutex_unlock(&f->lock);
347 EXPORT_SYMBOL(videobuf_dvb_get_frontend);
349 int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends *f,
350 struct dvb_frontend *p)
352 struct list_head *list, *q;
353 struct videobuf_dvb_frontend *fe = NULL;
356 mutex_lock(&f->lock);
358 list_for_each_safe(list, q, &f->felist) {
359 fe = list_entry(list, struct videobuf_dvb_frontend, felist);
360 if (fe->dvb.frontend == p) {
366 mutex_unlock(&f->lock);
370 EXPORT_SYMBOL(videobuf_dvb_find_frontend);
372 struct videobuf_dvb_frontend *videobuf_dvb_alloc_frontend(
373 struct videobuf_dvb_frontends *f, int id)
375 struct videobuf_dvb_frontend *fe;
377 fe = kzalloc(sizeof(struct videobuf_dvb_frontend), GFP_KERNEL);
382 mutex_init(&fe->dvb.lock);
384 mutex_lock(&f->lock);
385 list_add_tail(&fe->felist, &f->felist);
386 mutex_unlock(&f->lock);
391 EXPORT_SYMBOL(videobuf_dvb_alloc_frontend);
393 /* ------------------------------------------------------------------ */
397 * compile-command: "make DVB=1"