2 * $Id: video-buf-dvb.c,v 1.5 2004/11/07 13:17:15 kraxel Exp $
4 * some helper function for simple DVB cards which simply DMA the
5 * complete transport stream and let the computer sort everything else
6 * (i.e. we are using the software demux, ...). Also uses the
7 * video-buf to manage DMA buffers.
9 * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SUSE Labs]
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
17 #include <linux/module.h>
18 #include <linux/init.h>
19 #include <linux/device.h>
21 #include <linux/kthread.h>
22 #include <linux/file.h>
23 #include <linux/suspend.h>
25 #include <media/video-buf.h>
26 #include <media/video-buf-dvb.h>
28 /* ------------------------------------------------------------------ */
30 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
31 MODULE_LICENSE("GPL");
33 static unsigned int debug = 0;
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;
49 dprintk("dvb thread started\n");
50 videobuf_read_start(&dvb->dvbq);
53 /* fetch next buffer */
54 buf = list_entry(dvb->dvbq.stream.next,
55 struct videobuf_buffer, stream);
56 list_del(&buf->stream);
57 err = videobuf_waiton(buf,0,1);
60 /* no more feeds left or stop_feed() asked us to quit */
63 if (kthread_should_stop())
65 if (current->flags & PF_FREEZE)
66 refrigerator(PF_FREEZE);
68 /* feed buffer data to demux */
69 if (buf->state == STATE_DONE)
70 dvb_dmx_swfilter(&dvb->demux, buf->dma.vmalloc,
74 list_add_tail(&buf->stream,&dvb->dvbq.stream);
75 spin_lock_irqsave(dvb->dvbq.irqlock,flags);
76 dvb->dvbq.ops->buf_queue(&dvb->dvbq,buf);
77 spin_unlock_irqrestore(dvb->dvbq.irqlock,flags);
80 videobuf_read_stop(&dvb->dvbq);
81 dprintk("dvb thread stopped\n");
83 /* Hmm, linux becomes *very* unhappy without this ... */
84 while (!kthread_should_stop()) {
85 set_current_state(TASK_INTERRUPTIBLE);
91 static int videobuf_dvb_start_feed(struct dvb_demux_feed *feed)
93 struct dvb_demux *demux = feed->demux;
94 struct videobuf_dvb *dvb = demux->priv;
97 if (!demux->dmx.frontend)
104 if (NULL != dvb->thread)
106 dvb->thread = kthread_run(videobuf_dvb_thread,
107 dvb, "%s dvb", dvb->name);
108 if (IS_ERR(dvb->thread)) {
109 rc = PTR_ERR(dvb->thread);
118 static int videobuf_dvb_stop_feed(struct dvb_demux_feed *feed)
120 struct dvb_demux *demux = feed->demux;
121 struct videobuf_dvb *dvb = demux->priv;
126 if (0 == dvb->nfeeds && NULL != dvb->thread) {
127 // FIXME: cx8802_cancel_buffers(dev);
128 err = kthread_stop(dvb->thread);
135 /* ------------------------------------------------------------------ */
137 int videobuf_dvb_register(struct videobuf_dvb *dvb)
141 init_MUTEX(&dvb->lock);
143 /* register adapter */
144 result = dvb_register_adapter(&dvb->adapter, dvb->name, THIS_MODULE);
146 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
151 /* register frontend */
152 result = dvb_register_frontend(dvb->adapter, dvb->frontend);
154 printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n",
159 /* register demux stuff */
160 dvb->demux.dmx.capabilities =
161 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
162 DMX_MEMORY_BASED_FILTERING;
163 dvb->demux.priv = dvb;
164 dvb->demux.filternum = 256;
165 dvb->demux.feednum = 256;
166 dvb->demux.start_feed = videobuf_dvb_start_feed;
167 dvb->demux.stop_feed = videobuf_dvb_stop_feed;
168 result = dvb_dmx_init(&dvb->demux);
170 printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n",
175 dvb->dmxdev.filternum = 256;
176 dvb->dmxdev.demux = &dvb->demux.dmx;
177 dvb->dmxdev.capabilities = 0;
178 result = dvb_dmxdev_init(&dvb->dmxdev, dvb->adapter);
180 printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n",
185 dvb->fe_hw.source = DMX_FRONTEND_0;
186 result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
188 printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
193 dvb->fe_mem.source = DMX_MEMORY_FE;
194 result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
196 printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
201 result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
203 printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n",
208 /* register network adapter */
209 dvb_net_init(dvb->adapter, &dvb->net, &dvb->demux.dmx);
213 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
215 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
217 dvb_dmxdev_release(&dvb->dmxdev);
219 dvb_dmx_release(&dvb->demux);
221 dvb_unregister_frontend(dvb->frontend);
223 dvb_unregister_adapter(dvb->adapter);
228 void videobuf_dvb_unregister(struct videobuf_dvb *dvb)
230 dvb_net_release(&dvb->net);
231 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
232 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
233 dvb_dmxdev_release(&dvb->dmxdev);
234 dvb_dmx_release(&dvb->demux);
235 dvb_unregister_frontend(dvb->frontend);
236 dvb_unregister_adapter(dvb->adapter);
239 EXPORT_SYMBOL(videobuf_dvb_register);
240 EXPORT_SYMBOL(videobuf_dvb_unregister);
242 /* ------------------------------------------------------------------ */
246 * compile-command: "make DVB=1"