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21#include <linux/kthread.h>
22#include <linux/freezer.h>
23#include <linux/slab.h>
24#include <linux/mm.h>
25#include "dvbdev.h"
26#include "pvrusb2-debug.h"
27#include "pvrusb2-hdw-internal.h"
28#include "pvrusb2-hdw.h"
29#include "pvrusb2-io.h"
30#include "pvrusb2-dvb.h"
31
32DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
33
34static int pvr2_dvb_feed_func(struct pvr2_dvb_adapter *adap)
35{
36 int ret;
37 unsigned int count;
38 struct pvr2_buffer *bp;
39 struct pvr2_stream *stream;
40
41 pvr2_trace(PVR2_TRACE_DVB_FEED, "dvb feed thread started");
42 set_freezable();
43
44 stream = adap->channel.stream->stream;
45
46 for (;;) {
47 if (kthread_should_stop()) break;
48
49
50 try_to_freeze();
51
52 bp = pvr2_stream_get_ready_buffer(stream);
53 if (bp != NULL) {
54 count = pvr2_buffer_get_count(bp);
55 if (count) {
56 dvb_dmx_swfilter(
57 &adap->demux,
58 adap->buffer_storage[
59 pvr2_buffer_get_id(bp)],
60 count);
61 } else {
62 ret = pvr2_buffer_get_status(bp);
63 if (ret < 0) break;
64 }
65 ret = pvr2_buffer_queue(bp);
66 if (ret < 0) break;
67
68
69
70
71
72 continue;
73 }
74
75
76
77
78 ret = wait_event_interruptible(
79 adap->buffer_wait_data,
80 (pvr2_stream_get_ready_count(stream) > 0) ||
81 kthread_should_stop());
82 if (ret < 0) break;
83 }
84
85
86
87
88 pvr2_trace(PVR2_TRACE_DVB_FEED, "dvb feed thread stopped");
89
90 return 0;
91}
92
93static int pvr2_dvb_feed_thread(void *data)
94{
95 int stat = pvr2_dvb_feed_func(data);
96
97 while (!kthread_should_stop()) {
98 set_current_state(TASK_INTERRUPTIBLE);
99 schedule();
100 }
101 return stat;
102}
103
104static void pvr2_dvb_notify(struct pvr2_dvb_adapter *adap)
105{
106 wake_up(&adap->buffer_wait_data);
107}
108
109static void pvr2_dvb_stream_end(struct pvr2_dvb_adapter *adap)
110{
111 unsigned int idx;
112 struct pvr2_stream *stream;
113
114 if (adap->thread) {
115 kthread_stop(adap->thread);
116 adap->thread = NULL;
117 }
118
119 if (adap->channel.stream) {
120 stream = adap->channel.stream->stream;
121 } else {
122 stream = NULL;
123 }
124 if (stream) {
125 pvr2_hdw_set_streaming(adap->channel.hdw, 0);
126 pvr2_stream_set_callback(stream, NULL, NULL);
127 pvr2_stream_kill(stream);
128 pvr2_stream_set_buffer_count(stream, 0);
129 pvr2_channel_claim_stream(&adap->channel, NULL);
130 }
131
132 if (adap->stream_run) {
133 for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
134 if (!(adap->buffer_storage[idx])) continue;
135 kfree(adap->buffer_storage[idx]);
136 adap->buffer_storage[idx] = NULL;
137 }
138 adap->stream_run = 0;
139 }
140}
141
142static int pvr2_dvb_stream_do_start(struct pvr2_dvb_adapter *adap)
143{
144 struct pvr2_context *pvr = adap->channel.mc_head;
145 unsigned int idx;
146 int ret;
147 struct pvr2_buffer *bp;
148 struct pvr2_stream *stream = NULL;
149
150 if (adap->stream_run) return -EIO;
151
152 ret = pvr2_channel_claim_stream(&adap->channel, &pvr->video_stream);
153
154 if (ret < 0) return ret;
155
156 stream = adap->channel.stream->stream;
157
158 for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
159 adap->buffer_storage[idx] = kmalloc(PVR2_DVB_BUFFER_SIZE,
160 GFP_KERNEL);
161 if (!(adap->buffer_storage[idx])) return -ENOMEM;
162 }
163
164 pvr2_stream_set_callback(pvr->video_stream.stream,
165 (pvr2_stream_callback) pvr2_dvb_notify, adap);
166
167 ret = pvr2_stream_set_buffer_count(stream, PVR2_DVB_BUFFER_COUNT);
168 if (ret < 0) return ret;
169
170 for (idx = 0; idx < PVR2_DVB_BUFFER_COUNT; idx++) {
171 bp = pvr2_stream_get_buffer(stream, idx);
172 pvr2_buffer_set_buffer(bp,
173 adap->buffer_storage[idx],
174 PVR2_DVB_BUFFER_SIZE);
175 }
176
177 ret = pvr2_hdw_set_streaming(adap->channel.hdw, 1);
178 if (ret < 0) return ret;
179
180 while ((bp = pvr2_stream_get_idle_buffer(stream)) != NULL) {
181 ret = pvr2_buffer_queue(bp);
182 if (ret < 0) return ret;
183 }
184
185 adap->thread = kthread_run(pvr2_dvb_feed_thread, adap, "pvrusb2-dvb");
186
187 if (IS_ERR(adap->thread)) {
188 ret = PTR_ERR(adap->thread);
189 adap->thread = NULL;
190 return ret;
191 }
192
193 adap->stream_run = !0;
194
195 return 0;
196}
197
198static int pvr2_dvb_stream_start(struct pvr2_dvb_adapter *adap)
199{
200 int ret = pvr2_dvb_stream_do_start(adap);
201 if (ret < 0) pvr2_dvb_stream_end(adap);
202 return ret;
203}
204
205static int pvr2_dvb_ctrl_feed(struct dvb_demux_feed *dvbdmxfeed, int onoff)
206{
207 struct pvr2_dvb_adapter *adap = dvbdmxfeed->demux->priv;
208 int ret = 0;
209
210 if (adap == NULL) return -ENODEV;
211
212 mutex_lock(&adap->lock);
213 do {
214 if (onoff) {
215 if (!adap->feedcount) {
216 pvr2_trace(PVR2_TRACE_DVB_FEED,
217 "start feeding demux");
218 ret = pvr2_dvb_stream_start(adap);
219 if (ret < 0) break;
220 }
221 (adap->feedcount)++;
222 } else if (adap->feedcount > 0) {
223 (adap->feedcount)--;
224 if (!adap->feedcount) {
225 pvr2_trace(PVR2_TRACE_DVB_FEED,
226 "stop feeding demux");
227 pvr2_dvb_stream_end(adap);
228 }
229 }
230 } while (0);
231 mutex_unlock(&adap->lock);
232
233 return ret;
234}
235
236static int pvr2_dvb_start_feed(struct dvb_demux_feed *dvbdmxfeed)
237{
238 pvr2_trace(PVR2_TRACE_DVB_FEED, "start pid: 0x%04x", dvbdmxfeed->pid);
239 return pvr2_dvb_ctrl_feed(dvbdmxfeed, 1);
240}
241
242static int pvr2_dvb_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
243{
244 pvr2_trace(PVR2_TRACE_DVB_FEED, "stop pid: 0x%04x", dvbdmxfeed->pid);
245 return pvr2_dvb_ctrl_feed(dvbdmxfeed, 0);
246}
247
248static int pvr2_dvb_bus_ctrl(struct dvb_frontend *fe, int acquire)
249{
250 struct pvr2_dvb_adapter *adap = fe->dvb->priv;
251 return pvr2_channel_limit_inputs(
252 &adap->channel,
253 (acquire ? (1 << PVR2_CVAL_INPUT_DTV) : 0));
254}
255
256static int pvr2_dvb_adapter_init(struct pvr2_dvb_adapter *adap)
257{
258 int ret;
259
260 ret = dvb_register_adapter(&adap->dvb_adap, "pvrusb2-dvb",
261 THIS_MODULE,
262 &adap->channel.hdw->usb_dev->dev,
263 adapter_nr);
264 if (ret < 0) {
265 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
266 "dvb_register_adapter failed: error %d", ret);
267 goto err;
268 }
269 adap->dvb_adap.priv = adap;
270
271 adap->demux.dmx.capabilities = DMX_TS_FILTERING |
272 DMX_SECTION_FILTERING |
273 DMX_MEMORY_BASED_FILTERING;
274 adap->demux.priv = adap;
275 adap->demux.filternum = 256;
276 adap->demux.feednum = 256;
277 adap->demux.start_feed = pvr2_dvb_start_feed;
278 adap->demux.stop_feed = pvr2_dvb_stop_feed;
279 adap->demux.write_to_decoder = NULL;
280
281 ret = dvb_dmx_init(&adap->demux);
282 if (ret < 0) {
283 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
284 "dvb_dmx_init failed: error %d", ret);
285 goto err_dmx;
286 }
287
288 adap->dmxdev.filternum = adap->demux.filternum;
289 adap->dmxdev.demux = &adap->demux.dmx;
290 adap->dmxdev.capabilities = 0;
291
292 ret = dvb_dmxdev_init(&adap->dmxdev, &adap->dvb_adap);
293 if (ret < 0) {
294 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
295 "dvb_dmxdev_init failed: error %d", ret);
296 goto err_dmx_dev;
297 }
298
299 dvb_net_init(&adap->dvb_adap, &adap->dvb_net, &adap->demux.dmx);
300
301 return 0;
302
303err_dmx_dev:
304 dvb_dmx_release(&adap->demux);
305err_dmx:
306 dvb_unregister_adapter(&adap->dvb_adap);
307err:
308 return ret;
309}
310
311static int pvr2_dvb_adapter_exit(struct pvr2_dvb_adapter *adap)
312{
313 pvr2_trace(PVR2_TRACE_INFO, "unregistering DVB devices");
314 dvb_net_release(&adap->dvb_net);
315 adap->demux.dmx.close(&adap->demux.dmx);
316 dvb_dmxdev_release(&adap->dmxdev);
317 dvb_dmx_release(&adap->demux);
318 dvb_unregister_adapter(&adap->dvb_adap);
319 return 0;
320}
321
322static int pvr2_dvb_frontend_init(struct pvr2_dvb_adapter *adap)
323{
324 struct pvr2_hdw *hdw = adap->channel.hdw;
325 const struct pvr2_dvb_props *dvb_props = hdw->hdw_desc->dvb_props;
326 int ret = 0;
327
328 if (dvb_props == NULL) {
329 pvr2_trace(PVR2_TRACE_ERROR_LEGS, "fe_props not defined!");
330 return -EINVAL;
331 }
332
333 ret = pvr2_channel_limit_inputs(
334 &adap->channel,
335 (1 << PVR2_CVAL_INPUT_DTV));
336 if (ret) {
337 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
338 "failed to grab control of dtv input (code=%d)",
339 ret);
340 return ret;
341 }
342
343 if (dvb_props->frontend_attach == NULL) {
344 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
345 "frontend_attach not defined!");
346 ret = -EINVAL;
347 goto done;
348 }
349
350 if ((dvb_props->frontend_attach(adap) == 0) && (adap->fe)) {
351
352 if (dvb_register_frontend(&adap->dvb_adap, adap->fe)) {
353 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
354 "frontend registration failed!");
355 dvb_frontend_detach(adap->fe);
356 adap->fe = NULL;
357 ret = -ENODEV;
358 goto done;
359 }
360
361 if (dvb_props->tuner_attach)
362 dvb_props->tuner_attach(adap);
363
364 if (adap->fe->ops.analog_ops.standby)
365 adap->fe->ops.analog_ops.standby(adap->fe);
366
367
368 adap->fe->ops.ts_bus_ctrl = pvr2_dvb_bus_ctrl;
369
370 } else {
371 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
372 "no frontend was attached!");
373 ret = -ENODEV;
374 return ret;
375 }
376
377 done:
378 pvr2_channel_limit_inputs(&adap->channel, 0);
379 return ret;
380}
381
382static int pvr2_dvb_frontend_exit(struct pvr2_dvb_adapter *adap)
383{
384 if (adap->fe != NULL) {
385 dvb_unregister_frontend(adap->fe);
386 dvb_frontend_detach(adap->fe);
387 }
388 return 0;
389}
390
391static void pvr2_dvb_destroy(struct pvr2_dvb_adapter *adap)
392{
393 pvr2_dvb_stream_end(adap);
394 pvr2_dvb_frontend_exit(adap);
395 pvr2_dvb_adapter_exit(adap);
396 pvr2_channel_done(&adap->channel);
397 kfree(adap);
398}
399
400static void pvr2_dvb_internal_check(struct pvr2_channel *chp)
401{
402 struct pvr2_dvb_adapter *adap;
403 adap = container_of(chp, struct pvr2_dvb_adapter, channel);
404 if (!adap->channel.mc_head->disconnect_flag) return;
405 pvr2_dvb_destroy(adap);
406}
407
408struct pvr2_dvb_adapter *pvr2_dvb_create(struct pvr2_context *pvr)
409{
410 int ret = 0;
411 struct pvr2_dvb_adapter *adap;
412 if (!pvr->hdw->hdw_desc->dvb_props) {
413
414
415 return NULL;
416 }
417 adap = kzalloc(sizeof(*adap), GFP_KERNEL);
418 if (!adap) return adap;
419 pvr2_channel_init(&adap->channel, pvr);
420 adap->channel.check_func = pvr2_dvb_internal_check;
421 init_waitqueue_head(&adap->buffer_wait_data);
422 mutex_init(&adap->lock);
423 ret = pvr2_dvb_adapter_init(adap);
424 if (ret < 0) goto fail1;
425 ret = pvr2_dvb_frontend_init(adap);
426 if (ret < 0) goto fail2;
427 return adap;
428
429fail2:
430 pvr2_dvb_adapter_exit(adap);
431fail1:
432 pvr2_channel_done(&adap->channel);
433 return NULL;
434}
435
436
