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> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
59d34489 | 23 | |
7dfb7103 | 24 | #include <linux/freezer.h> |
1da177e4 | 25 | |
59d34489 | 26 | #include <media/videobuf-core.h> |
ba366a23 | 27 | #include <media/videobuf-dvb.h> |
1da177e4 LT |
28 | |
29 | /* ------------------------------------------------------------------ */ | |
30 | ||
31 | MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]"); | |
32 | MODULE_LICENSE("GPL"); | |
33 | ||
ff699e6b | 34 | static unsigned int debug; |
1da177e4 LT |
35 | module_param(debug, int, 0644); |
36 | MODULE_PARM_DESC(debug,"enable debug messages"); | |
37 | ||
38 | #define dprintk(fmt, arg...) if (debug) \ | |
39 | printk(KERN_DEBUG "%s/dvb: " fmt, dvb->name , ## arg) | |
40 | ||
41 | /* ------------------------------------------------------------------ */ | |
42 | ||
43 | static int videobuf_dvb_thread(void *data) | |
44 | { | |
45 | struct videobuf_dvb *dvb = data; | |
46 | struct videobuf_buffer *buf; | |
47 | unsigned long flags; | |
48 | int err; | |
59d34489 | 49 | void *outp; |
1da177e4 LT |
50 | |
51 | dprintk("dvb thread started\n"); | |
83144186 | 52 | set_freezable(); |
1da177e4 LT |
53 | videobuf_read_start(&dvb->dvbq); |
54 | ||
55 | for (;;) { | |
56 | /* fetch next buffer */ | |
57 | buf = list_entry(dvb->dvbq.stream.next, | |
58 | struct videobuf_buffer, stream); | |
59 | list_del(&buf->stream); | |
0e0809a5 | 60 | err = videobuf_waiton(&dvb->dvbq, buf, 0, 1); |
1da177e4 LT |
61 | |
62 | /* no more feeds left or stop_feed() asked us to quit */ | |
63 | if (0 == dvb->nfeeds) | |
64 | break; | |
65 | if (kthread_should_stop()) | |
66 | break; | |
3e1d1d28 | 67 | try_to_freeze(); |
1da177e4 LT |
68 | |
69 | /* feed buffer data to demux */ | |
f4fce60e | 70 | outp = videobuf_queue_to_vaddr(&dvb->dvbq, buf); |
59d34489 | 71 | |
0fc0686e | 72 | if (buf->state == VIDEOBUF_DONE) |
59d34489 | 73 | dvb_dmx_swfilter(&dvb->demux, outp, |
1da177e4 LT |
74 | buf->size); |
75 | ||
76 | /* requeue buffer */ | |
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); | |
81 | } | |
82 | ||
83 | videobuf_read_stop(&dvb->dvbq); | |
84 | dprintk("dvb thread stopped\n"); | |
85 | ||
86 | /* Hmm, linux becomes *very* unhappy without this ... */ | |
87 | while (!kthread_should_stop()) { | |
88 | set_current_state(TASK_INTERRUPTIBLE); | |
89 | schedule(); | |
90 | } | |
91 | return 0; | |
92 | } | |
93 | ||
94 | static int videobuf_dvb_start_feed(struct dvb_demux_feed *feed) | |
95 | { | |
96 | struct dvb_demux *demux = feed->demux; | |
97 | struct videobuf_dvb *dvb = demux->priv; | |
98 | int rc; | |
99 | ||
100 | if (!demux->dmx.frontend) | |
101 | return -EINVAL; | |
102 | ||
3593cab5 | 103 | mutex_lock(&dvb->lock); |
1da177e4 LT |
104 | dvb->nfeeds++; |
105 | rc = dvb->nfeeds; | |
106 | ||
107 | if (NULL != dvb->thread) | |
108 | goto out; | |
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); | |
113 | dvb->thread = NULL; | |
114 | } | |
115 | ||
116 | out: | |
3593cab5 | 117 | mutex_unlock(&dvb->lock); |
1da177e4 LT |
118 | return rc; |
119 | } | |
120 | ||
121 | static int videobuf_dvb_stop_feed(struct dvb_demux_feed *feed) | |
122 | { | |
123 | struct dvb_demux *demux = feed->demux; | |
124 | struct videobuf_dvb *dvb = demux->priv; | |
125 | int err = 0; | |
126 | ||
3593cab5 | 127 | mutex_lock(&dvb->lock); |
1da177e4 LT |
128 | dvb->nfeeds--; |
129 | if (0 == dvb->nfeeds && NULL != dvb->thread) { | |
1da177e4 LT |
130 | err = kthread_stop(dvb->thread); |
131 | dvb->thread = NULL; | |
132 | } | |
3593cab5 | 133 | mutex_unlock(&dvb->lock); |
1da177e4 LT |
134 | return err; |
135 | } | |
136 | ||
dcadd082 | 137 | static int videobuf_dvb_register_adapter(struct videobuf_dvb_frontends *fe, |
1da177e4 | 138 | struct module *module, |
d09dbf92 | 139 | void *adapter_priv, |
78e92006 | 140 | struct device *device, |
363c35fc | 141 | char *adapter_name, |
59b1842d | 142 | short *adapter_nr, |
9133aee0 MK |
143 | int mfe_shared, |
144 | int (*fe_ioctl_override)(struct dvb_frontend *, | |
145 | unsigned int, void *, unsigned int)) | |
1da177e4 LT |
146 | { |
147 | int result; | |
148 | ||
363c35fc | 149 | mutex_init(&fe->lock); |
1da177e4 LT |
150 | |
151 | /* register adapter */ | |
11fbedd3 ST |
152 | result = dvb_register_adapter(&fe->adapter, adapter_name, module, |
153 | device, adapter_nr); | |
1da177e4 LT |
154 | if (result < 0) { |
155 | printk(KERN_WARNING "%s: dvb_register_adapter failed (errno = %d)\n", | |
363c35fc | 156 | adapter_name, result); |
1da177e4 | 157 | } |
363c35fc | 158 | fe->adapter.priv = adapter_priv; |
59b1842d | 159 | fe->adapter.mfe_shared = mfe_shared; |
9133aee0 | 160 | fe->adapter.fe_ioctl_override = fe_ioctl_override; |
363c35fc ST |
161 | |
162 | return result; | |
163 | } | |
164 | ||
dcadd082 | 165 | static int videobuf_dvb_register_frontend(struct dvb_adapter *adapter, |
11fbedd3 | 166 | struct videobuf_dvb *dvb) |
363c35fc ST |
167 | { |
168 | int result; | |
1da177e4 LT |
169 | |
170 | /* register frontend */ | |
363c35fc | 171 | result = dvb_register_frontend(adapter, dvb->frontend); |
1da177e4 LT |
172 | if (result < 0) { |
173 | printk(KERN_WARNING "%s: dvb_register_frontend failed (errno = %d)\n", | |
174 | dvb->name, result); | |
175 | goto fail_frontend; | |
176 | } | |
177 | ||
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); | |
188 | if (result < 0) { | |
189 | printk(KERN_WARNING "%s: dvb_dmx_init failed (errno = %d)\n", | |
190 | dvb->name, result); | |
191 | goto fail_dmx; | |
192 | } | |
193 | ||
194 | dvb->dmxdev.filternum = 256; | |
195 | dvb->dmxdev.demux = &dvb->demux.dmx; | |
196 | dvb->dmxdev.capabilities = 0; | |
363c35fc ST |
197 | result = dvb_dmxdev_init(&dvb->dmxdev, adapter); |
198 | ||
1da177e4 LT |
199 | if (result < 0) { |
200 | printk(KERN_WARNING "%s: dvb_dmxdev_init failed (errno = %d)\n", | |
201 | dvb->name, result); | |
202 | goto fail_dmxdev; | |
203 | } | |
204 | ||
205 | dvb->fe_hw.source = DMX_FRONTEND_0; | |
206 | result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
207 | if (result < 0) { | |
208 | printk(KERN_WARNING "%s: add_frontend failed (DMX_FRONTEND_0, errno = %d)\n", | |
209 | dvb->name, result); | |
210 | goto fail_fe_hw; | |
211 | } | |
212 | ||
213 | dvb->fe_mem.source = DMX_MEMORY_FE; | |
214 | result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem); | |
215 | if (result < 0) { | |
216 | printk(KERN_WARNING "%s: add_frontend failed (DMX_MEMORY_FE, errno = %d)\n", | |
217 | dvb->name, result); | |
218 | goto fail_fe_mem; | |
219 | } | |
220 | ||
221 | result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
222 | if (result < 0) { | |
223 | printk(KERN_WARNING "%s: connect_frontend failed (errno = %d)\n", | |
224 | dvb->name, result); | |
225 | goto fail_fe_conn; | |
226 | } | |
227 | ||
228 | /* register network adapter */ | |
5c96ebb7 JN |
229 | result = dvb_net_init(adapter, &dvb->net, &dvb->demux.dmx); |
230 | if (result < 0) { | |
231 | printk(KERN_WARNING "%s: dvb_net_init failed (errno = %d)\n", | |
232 | dvb->name, result); | |
e43f3fab DB |
233 | goto fail_fe_conn; |
234 | } | |
1da177e4 LT |
235 | return 0; |
236 | ||
237 | fail_fe_conn: | |
238 | dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem); | |
239 | fail_fe_mem: | |
240 | dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw); | |
241 | fail_fe_hw: | |
242 | dvb_dmxdev_release(&dvb->dmxdev); | |
243 | fail_dmxdev: | |
244 | dvb_dmx_release(&dvb->demux); | |
245 | fail_dmx: | |
246 | dvb_unregister_frontend(dvb->frontend); | |
247 | fail_frontend: | |
f52a838b | 248 | dvb_frontend_detach(dvb->frontend); |
e43f3fab | 249 | dvb->frontend = NULL; |
363c35fc | 250 | |
1da177e4 LT |
251 | return result; |
252 | } | |
253 | ||
dcadd082 MCC |
254 | /* ------------------------------------------------------------------ */ |
255 | /* Register a single adapter and one or more frontends */ | |
256 | int videobuf_dvb_register_bus(struct videobuf_dvb_frontends *f, | |
257 | struct module *module, | |
258 | void *adapter_priv, | |
259 | struct device *device, | |
260 | short *adapter_nr, | |
9133aee0 MK |
261 | int mfe_shared, |
262 | int (*fe_ioctl_override)(struct dvb_frontend *, | |
263 | unsigned int, void *, unsigned int)) | |
dcadd082 MCC |
264 | { |
265 | struct list_head *list, *q; | |
266 | struct videobuf_dvb_frontend *fe; | |
267 | int res; | |
268 | ||
269 | fe = videobuf_dvb_get_frontend(f, 1); | |
270 | if (!fe) { | |
271 | printk(KERN_WARNING "Unable to register the adapter which has no frontends\n"); | |
272 | return -EINVAL; | |
273 | } | |
274 | ||
275 | /* Bring up the adapter */ | |
276 | res = videobuf_dvb_register_adapter(f, module, adapter_priv, device, | |
9133aee0 | 277 | fe->dvb.name, adapter_nr, mfe_shared, fe_ioctl_override); |
dcadd082 MCC |
278 | if (res < 0) { |
279 | printk(KERN_WARNING "videobuf_dvb_register_adapter failed (errno = %d)\n", res); | |
280 | return res; | |
281 | } | |
282 | ||
283 | /* Attach all of the frontends to the adapter */ | |
284 | mutex_lock(&f->lock); | |
285 | list_for_each_safe(list, q, &f->felist) { | |
286 | fe = list_entry(list, struct videobuf_dvb_frontend, felist); | |
287 | res = videobuf_dvb_register_frontend(&f->adapter, &fe->dvb); | |
288 | if (res < 0) { | |
289 | printk(KERN_WARNING "%s: videobuf_dvb_register_frontend failed (errno = %d)\n", | |
290 | fe->dvb.name, res); | |
291 | goto err; | |
292 | } | |
293 | } | |
294 | mutex_unlock(&f->lock); | |
295 | return 0; | |
296 | ||
297 | err: | |
298 | mutex_unlock(&f->lock); | |
299 | videobuf_dvb_unregister_bus(f); | |
300 | return res; | |
301 | } | |
302 | EXPORT_SYMBOL(videobuf_dvb_register_bus); | |
303 | ||
363c35fc | 304 | void videobuf_dvb_unregister_bus(struct videobuf_dvb_frontends *f) |
1da177e4 | 305 | { |
878595f6 | 306 | videobuf_dvb_dealloc_frontends(f); |
363c35fc ST |
307 | |
308 | dvb_unregister_adapter(&f->adapter); | |
309 | } | |
11fbedd3 | 310 | EXPORT_SYMBOL(videobuf_dvb_unregister_bus); |
363c35fc | 311 | |
11fbedd3 ST |
312 | struct videobuf_dvb_frontend *videobuf_dvb_get_frontend( |
313 | struct videobuf_dvb_frontends *f, int id) | |
363c35fc ST |
314 | { |
315 | struct list_head *list, *q; | |
316 | struct videobuf_dvb_frontend *fe, *ret = NULL; | |
317 | ||
318 | mutex_lock(&f->lock); | |
319 | ||
7bdf84fc | 320 | list_for_each_safe(list, q, &f->felist) { |
363c35fc ST |
321 | fe = list_entry(list, struct videobuf_dvb_frontend, felist); |
322 | if (fe->id == id) { | |
323 | ret = fe; | |
324 | break; | |
325 | } | |
326 | } | |
327 | ||
328 | mutex_unlock(&f->lock); | |
329 | ||
330 | return ret; | |
331 | } | |
11fbedd3 | 332 | EXPORT_SYMBOL(videobuf_dvb_get_frontend); |
363c35fc | 333 | |
11fbedd3 ST |
334 | int videobuf_dvb_find_frontend(struct videobuf_dvb_frontends *f, |
335 | struct dvb_frontend *p) | |
363c35fc ST |
336 | { |
337 | struct list_head *list, *q; | |
338 | struct videobuf_dvb_frontend *fe = NULL; | |
339 | int ret = 0; | |
340 | ||
341 | mutex_lock(&f->lock); | |
342 | ||
7bdf84fc | 343 | list_for_each_safe(list, q, &f->felist) { |
363c35fc ST |
344 | fe = list_entry(list, struct videobuf_dvb_frontend, felist); |
345 | if (fe->dvb.frontend == p) { | |
346 | ret = fe->id; | |
347 | break; | |
348 | } | |
349 | } | |
350 | ||
351 | mutex_unlock(&f->lock); | |
352 | ||
353 | return ret; | |
354 | } | |
11fbedd3 | 355 | EXPORT_SYMBOL(videobuf_dvb_find_frontend); |
363c35fc | 356 | |
11fbedd3 ST |
357 | struct videobuf_dvb_frontend *videobuf_dvb_alloc_frontend( |
358 | struct videobuf_dvb_frontends *f, int id) | |
363c35fc ST |
359 | { |
360 | struct videobuf_dvb_frontend *fe; | |
361 | ||
11fbedd3 | 362 | fe = kzalloc(sizeof(struct videobuf_dvb_frontend), GFP_KERNEL); |
363c35fc ST |
363 | if (fe == NULL) |
364 | goto fail_alloc; | |
365 | ||
363c35fc ST |
366 | fe->id = id; |
367 | mutex_init(&fe->dvb.lock); | |
368 | ||
369 | mutex_lock(&f->lock); | |
11fbedd3 | 370 | list_add_tail(&fe->felist, &f->felist); |
363c35fc ST |
371 | mutex_unlock(&f->lock); |
372 | ||
373 | fail_alloc: | |
374 | return fe; | |
1da177e4 | 375 | } |
363c35fc | 376 | EXPORT_SYMBOL(videobuf_dvb_alloc_frontend); |
878595f6 DB |
377 | |
378 | void videobuf_dvb_dealloc_frontends(struct videobuf_dvb_frontends *f) | |
379 | { | |
380 | struct list_head *list, *q; | |
381 | struct videobuf_dvb_frontend *fe; | |
382 | ||
383 | mutex_lock(&f->lock); | |
384 | list_for_each_safe(list, q, &f->felist) { | |
385 | fe = list_entry(list, struct videobuf_dvb_frontend, felist); | |
386 | if (fe->dvb.net.dvbdev) { | |
387 | dvb_net_release(&fe->dvb.net); | |
388 | fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, | |
389 | &fe->dvb.fe_mem); | |
390 | fe->dvb.demux.dmx.remove_frontend(&fe->dvb.demux.dmx, | |
391 | &fe->dvb.fe_hw); | |
392 | dvb_dmxdev_release(&fe->dvb.dmxdev); | |
393 | dvb_dmx_release(&fe->dvb.demux); | |
394 | dvb_unregister_frontend(fe->dvb.frontend); | |
395 | } | |
396 | if (fe->dvb.frontend) | |
397 | /* always allocated, may have been reset */ | |
398 | dvb_frontend_detach(fe->dvb.frontend); | |
399 | list_del(list); /* remove list entry */ | |
400 | kfree(fe); /* free frontend allocation */ | |
401 | } | |
402 | mutex_unlock(&f->lock); | |
403 | } | |
404 | EXPORT_SYMBOL(videobuf_dvb_dealloc_frontends); |