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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>
22
23#include <linux/freezer.h>
24
25#include <media/videobuf-core.h>
26#include <media/videobuf-dvb.h>
27
28
29
30MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
31MODULE_LICENSE("GPL");
32
33static unsigned int debug;
34module_param(debug, int, 0644);
35MODULE_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
42static 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;
48 void *outp;
49
50 dprintk("dvb thread started\n");
51 set_freezable();
52 videobuf_read_start(&dvb->dvbq);
53
54 for (;;) {
55
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);
60
61
62 if (0 == dvb->nfeeds)
63 break;
64 if (kthread_should_stop())
65 break;
66 try_to_freeze();
67
68
69 outp = videobuf_queue_to_vmalloc (&dvb->dvbq, buf);
70
71 if (buf->state == VIDEOBUF_DONE)
72 dvb_dmx_swfilter(&dvb->demux, outp,
73 buf->size);
74
75
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
86 while (!kthread_should_stop()) {
87 set_current_state(TASK_INTERRUPTIBLE);
88 schedule();
89 }
90 return 0;
91}
92
93static 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
102 mutex_lock(&dvb->lock);
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
115out:
116 mutex_unlock(&dvb->lock);
117 return rc;
118}
119
120static 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
126 mutex_lock(&dvb->lock);
127 dvb->nfeeds--;
128 if (0 == dvb->nfeeds && NULL != dvb->thread) {
129 err = kthread_stop(dvb->thread);
130 dvb->thread = NULL;
131 }
132 mutex_unlock(&dvb->lock);
133 return err;
134}
135
136static int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe,
137 struct module *module,
138 void *adapter_priv,
139 struct device *device,
140 char *adapter_name,
141 short *adapter_nr,
142 int mfe_shared)
143{
144 int result;
145
146 mutex_init(&fe->lock);
147
148
149 result = dvb_register_adapter(&fe->adapter, adapter_name, module,
150 device, adapter_nr);
151 if (result < 0) {
152 printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n",
153 adapter_name, result);
154 }
155 fe->adapter.priv = adapter_priv;
156 fe->adapter.mfe_shared = mfe_shared;
157
158 return result;
159}
160
161static int videobuf_dvb_register_frontend(struct dvb_adapter *adapter,
162 struct videobuf_dvb *dvb)
163{
164 int result;
165
166
167 result = dvb_register_frontend(adapter, dvb->frontend);
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
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;
193 result = dvb_dmxdev_init(&dvb->dmxdev, adapter);
194
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
225 dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx);
226 if (dvb->net.dvbdev == NULL) {
227 result = -ENOMEM;
228 goto fail_fe_conn;
229 }
230 return 0;
231
232fail_fe_conn:
233 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
234fail_fe_mem:
235 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
236fail_fe_hw:
237 dvb_dmxdev_release(&dvb->dmxdev);
238fail_dmxdev:
239 dvb_dmx_release(&dvb->demux);
240fail_dmx:
241 dvb_unregister_frontend(dvb->frontend);
242fail_frontend:
243 dvb_frontend_detach(dvb->frontend);
244 dvb->frontend = NULL;
245
246 return result;
247}
248
249
250
251int 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
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
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
290err:
291 mutex_unlock(&f->lock);
292 videobuf_dvb_unregister_bus(f);
293 return res;
294}
295EXPORT_SYMBOL(videobuf_dvb_register_bus);
296
297void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f)
298{
299 videobuf_dvb_dealloc_frontends(f);
300
301 dvb_unregister_adapter(&f->adapter);
302}
303EXPORT_SYMBOL(videobuf_dvb_unregister_bus);
304
305struct videobuf_dvb_frontend *videobuf_dvb_get_frontend(
306 struct videobuf_dvb_frontends *f, int id)
307{
308 struct list_head *list, *q;
309 struct videobuf_dvb_frontend *fe, *ret = NULL;
310
311 mutex_lock(&f->lock);
312
313 list_for_each_safe(list, q, &f->felist) {
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}
325EXPORT_SYMBOL(videobuf_dvb_get_frontend);
326
327int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends *f,
328 struct dvb_frontend *p)
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
336 list_for_each_safe(list, q, &f->felist) {
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}
348EXPORT_SYMBOL(videobuf_dvb_find_frontend);
349
350struct videobuf_dvb_frontend *videobuf_dvb_alloc_frontend(
351 struct videobuf_dvb_frontends *f, int id)
352{
353 struct videobuf_dvb_frontend *fe;
354
355 fe = kzalloc(sizeof(struct videobuf_dvb_frontend), GFP_KERNEL);
356 if (fe == NULL)
357 goto fail_alloc;
358
359 fe->id = id;
360 mutex_init(&fe->dvb.lock);
361
362 mutex_lock(&f->lock);
363 list_add_tail(&fe->felist, &f->felist);
364 mutex_unlock(&f->lock);
365
366fail_alloc:
367 return fe;
368}
369EXPORT_SYMBOL(videobuf_dvb_alloc_frontend);
370
371void 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
391 dvb_frontend_detach(fe->dvb.frontend);
392 list_del(list);
393 kfree(fe);
394 }
395 mutex_unlock(&f->lock);
396}
397EXPORT_SYMBOL(videobuf_dvb_dealloc_frontends);
398
