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 // FIXME: cx8802_cancel_buffers(dev);
130 err = kthread_stop(dvb->thread);
133 mutex_unlock(&dvb->lock);
137 /* ------------------------------------------------------------------ */
138 /* Register a single adapter and one or more frontends */
139 int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f,
140 struct module *module,
142 struct device *device,
146 struct list_head *list, *q;
147 struct videobuf_dvb_frontend *fe;
150 fe = videobuf_dvb_get_frontend(f, 1);
152 printk(KERN_WARNING "Unable to register the adapter which has no frontends\n");
156 /* Bring up the adapter */
157 res = videobuf_dvb_register_adapter(f, module, adapter_priv, device, 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->frontend.felist) {
166 fe = list_entry(list, struct videobuf_dvb_frontend, felist);
168 res = videobuf_dvb_register_frontend(&f->adapter, &fe->dvb);
170 printk(KERN_WARNING "%s: videobuf_dvb_register_frontend failed (errno = %d)\n",
174 mutex_unlock(&f->lock);
180 int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe,
181 struct module *module,
183 struct device *device,
190 mutex_init(&fe->lock);
192 /* register adapter */
193 result = dvb_register_adapter(&fe->adapter, adapter_name, module, device, adapter_nr);
195 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
196 adapter_name, result);
198 fe->adapter.priv = adapter_priv;
199 fe->adapter.mfe_shared = mfe_shared;
204 int videobuf_dvb_register_frontend(struct dvb_adapter *adapter, struct videobuf_dvb *dvb)
208 /* register frontend */
209 result = dvb_register_frontend(adapter, dvb->frontend);
211 printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
216 /* register demux stuff */
217 dvb->demux.dmx.capabilities =
218 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
219 DMX_MEMORY_BASED_FILTERING;
220 dvb->demux.priv = dvb;
221 dvb->demux.filternum = 256;
222 dvb->demux.feednum = 256;
223 dvb->demux.start_feed = videobuf_dvb_start_feed;
224 dvb->demux.stop_feed = videobuf_dvb_stop_feed;
225 result = dvb_dmx_init(&dvb->demux);
227 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
232 dvb->dmxdev.filternum = 256;
233 dvb->dmxdev.demux = &dvb->demux.dmx;
234 dvb->dmxdev.capabilities = 0;
235 result = dvb_dmxdev_init(&dvb->dmxdev, adapter);
238 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
243 dvb->fe_hw.source = DMX_FRONTEND_0;
244 result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
246 printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
251 dvb->fe_mem.source = DMX_MEMORY_FE;
252 result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
254 printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
259 result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
261 printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
266 /* register network adapter */
267 dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);
271 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
273 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
275 dvb_dmxdev_release(&dvb->dmxdev);
277 dvb_dmx_release(&dvb->demux);
279 dvb_unregister_frontend(dvb->frontend);
281 dvb_frontend_detach(dvb->frontend);
282 dvb_unregister_adapter(adapter);
287 void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f)
289 struct list_head *list, *q;
290 struct videobuf_dvb_frontend *fe;
292 mutex_lock(&f->lock);
293 list_for_each_safe(list, q, &f->frontend.felist) {
294 fe = list_entry(list, struct videobuf_dvb_frontend, felist);
296 dvb_net_release(&fe->dvb.net);
297 fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, &fe->dvb.fe_mem);
298 fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, &fe->dvb.fe_hw);
299 dvb_dmxdev_release(&fe->dvb.dmxdev);
300 dvb_dmx_release(&fe->dvb.demux);
301 dvb_unregister_frontend(fe->dvb.frontend);
302 dvb_frontend_detach(fe->dvb.frontend);
307 mutex_unlock(&f->lock);
309 dvb_unregister_adapter(&f->adapter);
312 struct videobuf_dvb_frontend * videobuf_dvb_get_frontend(struct videobuf_dvb_frontends *f, int id)
314 struct list_head *list, *q;
315 struct videobuf_dvb_frontend *fe, *ret = NULL;
317 mutex_lock(&f->lock);
319 list_for_each_safe(list, q, &f->frontend.felist) {
320 fe = list_entry(list, struct videobuf_dvb_frontend, felist);
327 mutex_unlock(&f->lock);
332 int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends *f, struct dvb_frontend *p)
334 struct list_head *list, *q;
335 struct videobuf_dvb_frontend *fe = NULL;
338 mutex_lock(&f->lock);
340 list_for_each_safe(list, q, &f->frontend.felist) {
341 fe = list_entry(list, struct videobuf_dvb_frontend, felist);
342 if (fe->dvb.frontend == p) {
348 mutex_unlock(&f->lock);
353 struct videobuf_dvb_frontend * videobuf_dvb_alloc_frontend(void *private, struct videobuf_dvb_frontends *f, int id)
355 struct videobuf_dvb_frontend *fe;
357 fe = kzalloc(sizeof(struct videobuf_dvb_frontend),GFP_KERNEL);
363 mutex_init(&fe->dvb.lock);
365 mutex_lock(&f->lock);
366 list_add_tail(&fe->felist,&f->frontend.felist);
367 mutex_unlock(&f->lock);
373 EXPORT_SYMBOL(videobuf_dvb_register_bus);
374 EXPORT_SYMBOL(videobuf_dvb_unregister_bus);
375 EXPORT_SYMBOL(videobuf_dvb_alloc_frontend);
376 EXPORT_SYMBOL(videobuf_dvb_get_frontend);
377 EXPORT_SYMBOL(videobuf_dvb_find_frontend);
379 /* ------------------------------------------------------------------ */
383 * compile-command: "make DVB=1"