Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
1da177e4 LT |
2 | * |
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. | |
7 | * | |
8 | * (c) 2004 Gerd Knorr <kraxel@bytesex.org> [SUSE Labs] | |
9 | * | |
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. | |
14 | */ | |
15 | ||
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> | |
59d34489 | 22 | |
7dfb7103 | 23 | #include <linux/freezer.h> |
1da177e4 | 24 | |
59d34489 | 25 | #include <media/videobuf-core.h> |
ba366a23 | 26 | #include <media/videobuf-dvb.h> |
1da177e4 LT |
27 | |
28 | /* ------------------------------------------------------------------ */ | |
29 | ||
30 | MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]"); | |
31 | MODULE_LICENSE("GPL"); | |
32 | ||
ff699e6b | 33 | static unsigned int debug; |
1da177e4 LT |
34 | module_param(debug, int, 0644); |
35 | MODULE_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 | ||
42 | static 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; | |
59d34489 | 48 | void *outp; |
1da177e4 LT |
49 | |
50 | dprintk("dvb thread started\n"); | |
83144186 | 51 | set_freezable(); |
1da177e4 LT |
52 | videobuf_read_start(&dvb->dvbq); |
53 | ||
54 | for (;;) { | |
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); | |
1da177e4 LT |
60 | |
61 | /* no more feeds left or stop_feed() asked us to quit */ | |
62 | if (0 == dvb->nfeeds) | |
63 | break; | |
64 | if (kthread_should_stop()) | |
65 | break; | |
3e1d1d28 | 66 | try_to_freeze(); |
1da177e4 LT |
67 | |
68 | /* feed buffer data to demux */ | |
59d34489 MCC |
69 | outp = videobuf_queue_to_vmalloc (&dvb->dvbq, buf); |
70 | ||
0fc0686e | 71 | if (buf->state == VIDEOBUF_DONE) |
59d34489 | 72 | dvb_dmx_swfilter(&dvb->demux, outp, |
1da177e4 LT |
73 | buf->size); |
74 | ||
75 | /* requeue buffer */ | |
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 | /* Hmm, linux becomes *very* unhappy without this ... */ | |
86 | while (!kthread_should_stop()) { | |
87 | set_current_state(TASK_INTERRUPTIBLE); | |
88 | schedule(); | |
89 | } | |
90 | return 0; | |
91 | } | |
92 | ||
93 | static 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 | ||
3593cab5 | 102 | mutex_lock(&dvb->lock); |
1da177e4 LT |
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 | ||
115 | out: | |
3593cab5 | 116 | mutex_unlock(&dvb->lock); |
1da177e4 LT |
117 | return rc; |
118 | } | |
119 | ||
120 | static 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 | ||
3593cab5 | 126 | mutex_lock(&dvb->lock); |
1da177e4 LT |
127 | dvb->nfeeds--; |
128 | if (0 == dvb->nfeeds && NULL != dvb->thread) { | |
129 | // FIXME: cx8802_cancel_buffers(dev); | |
130 | err = kthread_stop(dvb->thread); | |
131 | dvb->thread = NULL; | |
132 | } | |
3593cab5 | 133 | mutex_unlock(&dvb->lock); |
1da177e4 LT |
134 | return err; |
135 | } | |
136 | ||
137 | /* ------------------------------------------------------------------ */ | |
363c35fc ST |
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, | |
141 | void *adapter_priv, | |
142 | struct device *device, | |
59b1842d DB |
143 | short *adapter_nr, |
144 | int mfe_shared) | |
363c35fc ST |
145 | { |
146 | struct list_head *list, *q; | |
147 | struct videobuf_dvb_frontend *fe; | |
148 | int res = -EINVAL; | |
149 | ||
150 | fe = videobuf_dvb_get_frontend(f, 1); | |
151 | if (!fe) { | |
152 | printk(KERN_WARNING "Unable to register the adapter which has no frontends\n"); | |
153 | goto err; | |
154 | } | |
155 | ||
156 | /* Bring up the adapter */ | |
59b1842d | 157 | res = videobuf_dvb_register_adapter(f, module, adapter_priv, device, fe->dvb.name, adapter_nr, mfe_shared); |
363c35fc ST |
158 | if (res < 0) { |
159 | printk(KERN_WARNING "videobuf_dvb_register_adapter failed (errno = %d)\n", res); | |
160 | goto err; | |
161 | } | |
1da177e4 | 162 | |
363c35fc ST |
163 | /* Attach all of the frontends to the adapter */ |
164 | mutex_lock(&f->lock); | |
7bdf84fc | 165 | list_for_each_safe(list, q, &f->felist) { |
363c35fc | 166 | fe = list_entry(list, struct videobuf_dvb_frontend, felist); |
363c35fc ST |
167 | res = videobuf_dvb_register_frontend(&f->adapter, &fe->dvb); |
168 | if (res < 0) { | |
169 | printk(KERN_WARNING "%s: videobuf_dvb_register_frontend failed (errno = %d)\n", | |
170 | fe->dvb.name, res); | |
171 | } | |
172 | } | |
173 | mutex_unlock(&f->lock); | |
174 | ||
175 | err: | |
176 | return res; | |
177 | } | |
178 | ||
179 | int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe, | |
1da177e4 | 180 | struct module *module, |
d09dbf92 | 181 | void *adapter_priv, |
78e92006 | 182 | struct device *device, |
363c35fc | 183 | char *adapter_name, |
59b1842d DB |
184 | short *adapter_nr, |
185 | int mfe_shared) | |
1da177e4 LT |
186 | { |
187 | int result; | |
188 | ||
363c35fc | 189 | mutex_init(&fe->lock); |
1da177e4 LT |
190 | |
191 | /* register adapter */ | |
363c35fc | 192 | result = dvb_register_adapter(&fe->adapter, adapter_name, module, device, adapter_nr); |
1da177e4 LT |
193 | if (result < 0) { |
194 | printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n", | |
363c35fc | 195 | adapter_name, result); |
1da177e4 | 196 | } |
363c35fc | 197 | fe->adapter.priv = adapter_priv; |
59b1842d | 198 | fe->adapter.mfe_shared = mfe_shared; |
363c35fc ST |
199 | |
200 | return result; | |
201 | } | |
202 | ||
203 | int videobuf_dvb_register_frontend(struct dvb_adapter *adapter, struct videobuf_dvb *dvb) | |
204 | { | |
205 | int result; | |
1da177e4 LT |
206 | |
207 | /* register frontend */ | |
363c35fc | 208 | result = dvb_register_frontend(adapter, dvb->frontend); |
1da177e4 LT |
209 | if (result < 0) { |
210 | printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n", | |
211 | dvb->name, result); | |
212 | goto fail_frontend; | |
213 | } | |
214 | ||
215 | /* register demux stuff */ | |
216 | dvb->demux.dmx.capabilities = | |
217 | DMX_TS_FILTERING | DMX_SECTION_FILTERING | | |
218 | DMX_MEMORY_BASED_FILTERING; | |
219 | dvb->demux.priv = dvb; | |
220 | dvb->demux.filternum = 256; | |
221 | dvb->demux.feednum = 256; | |
222 | dvb->demux.start_feed = videobuf_dvb_start_feed; | |
223 | dvb->demux.stop_feed = videobuf_dvb_stop_feed; | |
224 | result = dvb_dmx_init(&dvb->demux); | |
225 | if (result < 0) { | |
226 | printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n", | |
227 | dvb->name, result); | |
228 | goto fail_dmx; | |
229 | } | |
230 | ||
231 | dvb->dmxdev.filternum = 256; | |
232 | dvb->dmxdev.demux = &dvb->demux.dmx; | |
233 | dvb->dmxdev.capabilities = 0; | |
363c35fc ST |
234 | result = dvb_dmxdev_init(&dvb->dmxdev, adapter); |
235 | ||
1da177e4 LT |
236 | if (result < 0) { |
237 | printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n", | |
238 | dvb->name, result); | |
239 | goto fail_dmxdev; | |
240 | } | |
241 | ||
242 | dvb->fe_hw.source = DMX_FRONTEND_0; | |
243 | result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
244 | if (result < 0) { | |
245 | printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n", | |
246 | dvb->name, result); | |
247 | goto fail_fe_hw; | |
248 | } | |
249 | ||
250 | dvb->fe_mem.source = DMX_MEMORY_FE; | |
251 | result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem); | |
252 | if (result < 0) { | |
253 | printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n", | |
254 | dvb->name, result); | |
255 | goto fail_fe_mem; | |
256 | } | |
257 | ||
258 | result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
259 | if (result < 0) { | |
260 | printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n", | |
261 | dvb->name, result); | |
262 | goto fail_fe_conn; | |
263 | } | |
264 | ||
265 | /* register network adapter */ | |
363c35fc | 266 | dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx); |
1da177e4 LT |
267 | return 0; |
268 | ||
269 | fail_fe_conn: | |
270 | dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem); | |
271 | fail_fe_mem: | |
272 | dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
273 | fail_fe_hw: | |
274 | dvb_dmxdev_release(&dvb->dmxdev); | |
275 | fail_dmxdev: | |
276 | dvb_dmx_release(&dvb->demux); | |
277 | fail_dmx: | |
278 | dvb_unregister_frontend(dvb->frontend); | |
279 | fail_frontend: | |
f52a838b | 280 | dvb_frontend_detach(dvb->frontend); |
92abe9ee | 281 | dvb_unregister_adapter(adapter); |
363c35fc | 282 | |
1da177e4 LT |
283 | return result; |
284 | } | |
285 | ||
363c35fc | 286 | void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f) |
1da177e4 | 287 | { |
363c35fc ST |
288 | struct list_head *list, *q; |
289 | struct videobuf_dvb_frontend *fe; | |
290 | ||
291 | mutex_lock(&f->lock); | |
7bdf84fc | 292 | list_for_each_safe(list, q, &f->felist) { |
363c35fc ST |
293 | fe = list_entry(list, struct videobuf_dvb_frontend, felist); |
294 | ||
295 | dvb_net_release(&fe->dvb.net); | |
296 | fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, &fe->dvb.fe_mem); | |
297 | fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, &fe->dvb.fe_hw); | |
298 | dvb_dmxdev_release(&fe->dvb.dmxdev); | |
299 | dvb_dmx_release(&fe->dvb.demux); | |
300 | dvb_unregister_frontend(fe->dvb.frontend); | |
301 | dvb_frontend_detach(fe->dvb.frontend); | |
302 | ||
303 | list_del(list); | |
304 | kfree(fe); | |
305 | } | |
306 | mutex_unlock(&f->lock); | |
307 | ||
308 | dvb_unregister_adapter(&f->adapter); | |
309 | } | |
310 | ||
311 | struct videobuf_dvb_frontend * videobuf_dvb_get_frontend(struct videobuf_dvb_frontends *f, int id) | |
312 | { | |
313 | struct list_head *list, *q; | |
314 | struct videobuf_dvb_frontend *fe, *ret = NULL; | |
315 | ||
316 | mutex_lock(&f->lock); | |
317 | ||
7bdf84fc | 318 | list_for_each_safe(list, q, &f->felist) { |
363c35fc ST |
319 | fe = list_entry(list, struct videobuf_dvb_frontend, felist); |
320 | if (fe->id == id) { | |
321 | ret = fe; | |
322 | break; | |
323 | } | |
324 | } | |
325 | ||
326 | mutex_unlock(&f->lock); | |
327 | ||
328 | return ret; | |
329 | } | |
330 | ||
331 | int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends *f, struct dvb_frontend *p) | |
332 | { | |
333 | struct list_head *list, *q; | |
334 | struct videobuf_dvb_frontend *fe = NULL; | |
335 | int ret = 0; | |
336 | ||
337 | mutex_lock(&f->lock); | |
338 | ||
7bdf84fc | 339 | list_for_each_safe(list, q, &f->felist) { |
363c35fc ST |
340 | fe = list_entry(list, struct videobuf_dvb_frontend, felist); |
341 | if (fe->dvb.frontend == p) { | |
342 | ret = fe->id; | |
343 | break; | |
344 | } | |
345 | } | |
346 | ||
347 | mutex_unlock(&f->lock); | |
348 | ||
349 | return ret; | |
350 | } | |
351 | ||
352 | struct videobuf_dvb_frontend * videobuf_dvb_alloc_frontend(void *private, struct videobuf_dvb_frontends *f, int id) | |
353 | { | |
354 | struct videobuf_dvb_frontend *fe; | |
355 | ||
356 | fe = kzalloc(sizeof(struct videobuf_dvb_frontend),GFP_KERNEL); | |
357 | if (fe == NULL) | |
358 | goto fail_alloc; | |
359 | ||
360 | fe->dev = private; | |
361 | fe->id = id; | |
362 | mutex_init(&fe->dvb.lock); | |
363 | ||
364 | mutex_lock(&f->lock); | |
7bdf84fc | 365 | list_add_tail(&fe->felist,&f->felist); |
363c35fc ST |
366 | mutex_unlock(&f->lock); |
367 | ||
368 | fail_alloc: | |
369 | return fe; | |
1da177e4 LT |
370 | } |
371 | ||
363c35fc ST |
372 | EXPORT_SYMBOL(videobuf_dvb_register_bus); |
373 | EXPORT_SYMBOL(videobuf_dvb_unregister_bus); | |
374 | EXPORT_SYMBOL(videobuf_dvb_alloc_frontend); | |
375 | EXPORT_SYMBOL(videobuf_dvb_get_frontend); | |
376 | EXPORT_SYMBOL(videobuf_dvb_find_frontend); | |
1da177e4 LT |
377 | |
378 | /* ------------------------------------------------------------------ */ | |
379 | /* | |
380 | * Local variables: | |
381 | * c-basic-offset: 8 | |
382 | * compile-command: "make DVB=1" | |
383 | * End: | |
384 | */ |