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>
22 #include <linux/slab.h>
24 #include <linux/freezer.h>
26 #include <media/videobuf-core.h>
27 #include <media/videobuf-dvb.h>
29 /* ------------------------------------------------------------------ */
31 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
32 MODULE_LICENSE("GPL");
34 static unsigned int debug;
35 module_param(debug, int, 0644);
36 MODULE_PARM_DESC(debug,"enable debug messages");
38 #define dprintk(fmt, arg...) if (debug) \
39 printk(KERN_DEBUG "%s/dvb: " fmt, dvb->name , ## arg)
41 /* ------------------------------------------------------------------ */
43 static int videobuf_dvb_thread(void *data)
45 struct videobuf_dvb *dvb = data;
46 struct videobuf_buffer *buf;
51 dprintk("dvb thread started\n");
53 videobuf_read_start(&dvb->dvbq);
56 /* fetch next buffer */
57 buf = list_entry(dvb->dvbq.stream.next,
58 struct videobuf_buffer, stream);
59 list_del(&buf->stream);
60 err = videobuf_waiton(&dvb->dvbq, buf, 0, 1);
62 /* no more feeds left or stop_feed() asked us to quit */
65 if (kthread_should_stop())
69 /* feed buffer data to demux */
70 outp = videobuf_queue_to_vaddr(&dvb->dvbq, buf);
72 if (buf->state == VIDEOBUF_DONE)
73 dvb_dmx_swfilter(&dvb->demux, outp,
77 list_add_tail(&buf->stream,&dvb->dvbq.stream);
78 spin_lock_irqsave(dvb->dvbq.irqlock,flags);
79 dvb->dvbq.ops->buf_queue(&dvb->dvbq,buf);
80 spin_unlock_irqrestore(dvb->dvbq.irqlock,flags);
83 videobuf_read_stop(&dvb->dvbq);
84 dprintk("dvb thread stopped\n");
86 /* Hmm, linux becomes *very* unhappy without this ... */
87 while (!kthread_should_stop()) {
88 set_current_state(TASK_INTERRUPTIBLE);
94 static int videobuf_dvb_start_feed(struct dvb_demux_feed *feed)
96 struct dvb_demux *demux = feed->demux;
97 struct videobuf_dvb *dvb = demux->priv;
100 if (!demux->dmx.frontend)
103 mutex_lock(&dvb->lock);
107 if (NULL != dvb->thread)
109 dvb->thread = kthread_run(videobuf_dvb_thread,
110 dvb, "%s dvb", dvb->name);
111 if (IS_ERR(dvb->thread)) {
112 rc = PTR_ERR(dvb->thread);
117 mutex_unlock(&dvb->lock);
121 static int videobuf_dvb_stop_feed(struct dvb_demux_feed *feed)
123 struct dvb_demux *demux = feed->demux;
124 struct videobuf_dvb *dvb = demux->priv;
127 mutex_lock(&dvb->lock);
129 if (0 == dvb->nfeeds && NULL != dvb->thread) {
130 err = kthread_stop(dvb->thread);
133 mutex_unlock(&dvb->lock);
137 static int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe,
138 struct module *module,
140 struct device *device,
144 int (*fe_ioctl_override)(struct dvb_frontend *,
145 unsigned int, void *, unsigned int))
149 mutex_init(&fe->lock);
151 /* register adapter */
152 result = dvb_register_adapter(&fe->adapter, adapter_name, module,
155 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
156 adapter_name, result);
158 fe->adapter.priv = adapter_priv;
159 fe->adapter.mfe_shared = mfe_shared;
160 fe->adapter.fe_ioctl_override = fe_ioctl_override;
165 static int videobuf_dvb_register_frontend(struct dvb_adapter *adapter,
166 struct videobuf_dvb *dvb)
170 /* register frontend */
171 result = dvb_register_frontend(adapter, dvb->frontend);
173 printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
178 /* register demux stuff */
179 dvb->demux.dmx.capabilities =
180 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
181 DMX_MEMORY_BASED_FILTERING;
182 dvb->demux.priv = dvb;
183 dvb->demux.filternum = 256;
184 dvb->demux.feednum = 256;
185 dvb->demux.start_feed = videobuf_dvb_start_feed;
186 dvb->demux.stop_feed = videobuf_dvb_stop_feed;
187 result = dvb_dmx_init(&dvb->demux);
189 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
194 dvb->dmxdev.filternum = 256;
195 dvb->dmxdev.demux = &dvb->demux.dmx;
196 dvb->dmxdev.capabilities = 0;
197 result = dvb_dmxdev_init(&dvb->dmxdev, adapter);
200 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
205 dvb->fe_hw.source = DMX_FRONTEND_0;
206 result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
208 printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
213 dvb->fe_mem.source = DMX_MEMORY_FE;
214 result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
216 printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
221 result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
223 printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
228 /* register network adapter */
229 dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);
230 if (dvb->net.dvbdev == NULL) {
237 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
239 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
241 dvb_dmxdev_release(&dvb->dmxdev);
243 dvb_dmx_release(&dvb->demux);
245 dvb_unregister_frontend(dvb->frontend);
247 dvb_frontend_detach(dvb->frontend);
248 dvb->frontend = NULL;
253 /* ------------------------------------------------------------------ */
254 /* Register a single adapter and one or more frontends */
255 int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f,
256 struct module *module,
258 struct device *device,
261 int (*fe_ioctl_override)(struct dvb_frontend *,
262 unsigned int, void *, unsigned int))
264 struct list_head *list, *q;
265 struct videobuf_dvb_frontend *fe;
268 fe = videobuf_dvb_get_frontend(f, 1);
270 printk(KERN_WARNING "Unable to register the adapter which has no frontends\n");
274 /* Bring up the adapter */
275 res = videobuf_dvb_register_adapter(f, module, adapter_priv, device,
276 fe->dvb.name, adapter_nr, mfe_shared, fe_ioctl_override);
278 printk(KERN_WARNING "videobuf_dvb_register_adapter failed (errno = %d)\n", res);
282 /* Attach all of the frontends to the adapter */
283 mutex_lock(&f->lock);
284 list_for_each_safe(list, q, &f->felist) {
285 fe = list_entry(list, struct videobuf_dvb_frontend, felist);
286 res = videobuf_dvb_register_frontend(&f->adapter, &fe->dvb);
288 printk(KERN_WARNING "%s: videobuf_dvb_register_frontend failed (errno = %d)\n",
293 mutex_unlock(&f->lock);
297 mutex_unlock(&f->lock);
298 videobuf_dvb_unregister_bus(f);
301 EXPORT_SYMBOL(videobuf_dvb_register_bus);
303 void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f)
305 videobuf_dvb_dealloc_frontends(f);
307 dvb_unregister_adapter(&f->adapter);
309 EXPORT_SYMBOL(videobuf_dvb_unregister_bus);
311 struct videobuf_dvb_frontend *videobuf_dvb_get_frontend(
312 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->felist) {
320 fe = list_entry(list, struct videobuf_dvb_frontend, felist);
327 mutex_unlock(&f->lock);
331 EXPORT_SYMBOL(videobuf_dvb_get_frontend);
333 int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends *f,
334 struct dvb_frontend *p)
336 struct list_head *list, *q;
337 struct videobuf_dvb_frontend *fe = NULL;
340 mutex_lock(&f->lock);
342 list_for_each_safe(list, q, &f->felist) {
343 fe = list_entry(list, struct videobuf_dvb_frontend, felist);
344 if (fe->dvb.frontend == p) {
350 mutex_unlock(&f->lock);
354 EXPORT_SYMBOL(videobuf_dvb_find_frontend);
356 struct videobuf_dvb_frontend *videobuf_dvb_alloc_frontend(
357 struct videobuf_dvb_frontends *f, int id)
359 struct videobuf_dvb_frontend *fe;
361 fe = kzalloc(sizeof(struct videobuf_dvb_frontend), GFP_KERNEL);
366 mutex_init(&fe->dvb.lock);
368 mutex_lock(&f->lock);
369 list_add_tail(&fe->felist, &f->felist);
370 mutex_unlock(&f->lock);
375 EXPORT_SYMBOL(videobuf_dvb_alloc_frontend);
377 void videobuf_dvb_dealloc_frontends(struct videobuf_dvb_frontends *f)
379 struct list_head *list, *q;
380 struct videobuf_dvb_frontend *fe;
382 mutex_lock(&f->lock);
383 list_for_each_safe(list, q, &f->felist) {
384 fe = list_entry(list, struct videobuf_dvb_frontend, felist);
385 if (fe->dvb.net.dvbdev) {
386 dvb_net_release(&fe->dvb.net);
387 fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
389 fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx,
391 dvb_dmxdev_release(&fe->dvb.dmxdev);
392 dvb_dmx_release(&fe->dvb.demux);
393 dvb_unregister_frontend(fe->dvb.frontend);
395 if (fe->dvb.frontend)
396 /* always allocated, may have been reset */
397 dvb_frontend_detach(fe->dvb.frontend);
398 list_del(list); /* remove list entry */
399 kfree(fe); /* free frontend allocation */
401 mutex_unlock(&f->lock);
403 EXPORT_SYMBOL(videobuf_dvb_dealloc_frontends);