1
2
3
4
5
6
7
8
9
10
11
12
13#include <linux/dev_printk.h>
14#include <linux/moduleparam.h>
15#include <linux/mutex.h>
16#include <linux/platform_device.h>
17#include <linux/time.h>
18#include <linux/types.h>
19#include <linux/workqueue.h>
20#include <media/dvbdev.h>
21#include <media/media-device.h>
22
23#include "vidtv_bridge.h"
24#include "vidtv_common.h"
25#include "vidtv_demod.h"
26#include "vidtv_mux.h"
27#include "vidtv_ts.h"
28#include "vidtv_tuner.h"
29
30#define MUX_BUF_MIN_SZ 90164
31#define MUX_BUF_MAX_SZ (MUX_BUF_MIN_SZ * 10)
32#define TUNER_DEFAULT_ADDR 0x68
33#define DEMOD_DEFAULT_ADDR 0x60
34#define VIDTV_DEFAULT_NETWORK_ID 0xff44
35#define VIDTV_DEFAULT_NETWORK_NAME "LinuxTV.org"
36#define VIDTV_DEFAULT_TS_ID 0x4081
37
38
39
40
41
42
43#define LNB_CUT_FREQUENCY 11700000
44#define LNB_LOW_FREQ 9750000
45#define LNB_HIGH_FREQ 10600000
46
47static unsigned int drop_tslock_prob_on_low_snr;
48module_param(drop_tslock_prob_on_low_snr, uint, 0);
49MODULE_PARM_DESC(drop_tslock_prob_on_low_snr,
50 "Probability of losing the TS lock if the signal quality is bad");
51
52static unsigned int recover_tslock_prob_on_good_snr;
53module_param(recover_tslock_prob_on_good_snr, uint, 0);
54MODULE_PARM_DESC(recover_tslock_prob_on_good_snr,
55 "Probability recovering the TS lock when the signal improves");
56
57static unsigned int mock_power_up_delay_msec;
58module_param(mock_power_up_delay_msec, uint, 0);
59MODULE_PARM_DESC(mock_power_up_delay_msec, "Simulate a power up delay");
60
61static unsigned int mock_tune_delay_msec;
62module_param(mock_tune_delay_msec, uint, 0);
63MODULE_PARM_DESC(mock_tune_delay_msec, "Simulate a tune delay");
64
65static unsigned int vidtv_valid_dvb_t_freqs[NUM_VALID_TUNER_FREQS] = {
66 474000000
67};
68
69module_param_array(vidtv_valid_dvb_t_freqs, uint, NULL, 0);
70MODULE_PARM_DESC(vidtv_valid_dvb_t_freqs,
71 "Valid DVB-T frequencies to simulate, in Hz");
72
73static unsigned int vidtv_valid_dvb_c_freqs[NUM_VALID_TUNER_FREQS] = {
74 474000000
75};
76
77module_param_array(vidtv_valid_dvb_c_freqs, uint, NULL, 0);
78MODULE_PARM_DESC(vidtv_valid_dvb_c_freqs,
79 "Valid DVB-C frequencies to simulate, in Hz");
80
81static unsigned int vidtv_valid_dvb_s_freqs[NUM_VALID_TUNER_FREQS] = {
82 11362000
83};
84module_param_array(vidtv_valid_dvb_s_freqs, uint, NULL, 0);
85MODULE_PARM_DESC(vidtv_valid_dvb_s_freqs,
86 "Valid DVB-S/S2 frequencies to simulate at Ku-Band, in kHz");
87
88static unsigned int max_frequency_shift_hz;
89module_param(max_frequency_shift_hz, uint, 0);
90MODULE_PARM_DESC(max_frequency_shift_hz,
91 "Maximum shift in HZ allowed when tuning in a channel");
92
93DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nums);
94
95
96
97
98static unsigned int si_period_msec = 40;
99module_param(si_period_msec, uint, 0);
100MODULE_PARM_DESC(si_period_msec, "How often to send SI packets. Default: 40ms");
101
102static unsigned int pcr_period_msec = 40;
103module_param(pcr_period_msec, uint, 0);
104MODULE_PARM_DESC(pcr_period_msec,
105 "How often to send PCR packets. Default: 40ms");
106
107static unsigned int mux_rate_kbytes_sec = 4096;
108module_param(mux_rate_kbytes_sec, uint, 0);
109MODULE_PARM_DESC(mux_rate_kbytes_sec, "Mux rate: will pad stream if below");
110
111static unsigned int pcr_pid = 0x200;
112module_param(pcr_pid, uint, 0);
113MODULE_PARM_DESC(pcr_pid, "PCR PID for all channels: defaults to 0x200");
114
115static unsigned int mux_buf_sz_pkts;
116module_param(mux_buf_sz_pkts, uint, 0);
117MODULE_PARM_DESC(mux_buf_sz_pkts,
118 "Size for the internal mux buffer in multiples of 188 bytes");
119
120static u32 vidtv_bridge_mux_buf_sz_for_mux_rate(void)
121{
122 u32 max_elapsed_time_msecs = VIDTV_MAX_SLEEP_USECS / USEC_PER_MSEC;
123 u32 mux_buf_sz = mux_buf_sz_pkts * TS_PACKET_LEN;
124 u32 nbytes_expected;
125
126 nbytes_expected = mux_rate_kbytes_sec;
127 nbytes_expected *= max_elapsed_time_msecs;
128
129 mux_buf_sz = roundup(nbytes_expected, TS_PACKET_LEN);
130 mux_buf_sz += mux_buf_sz / 10;
131
132 if (mux_buf_sz < MUX_BUF_MIN_SZ)
133 mux_buf_sz = MUX_BUF_MIN_SZ;
134
135 if (mux_buf_sz > MUX_BUF_MAX_SZ)
136 mux_buf_sz = MUX_BUF_MAX_SZ;
137
138 return mux_buf_sz;
139}
140
141static bool vidtv_bridge_check_demod_lock(struct vidtv_dvb *dvb, u32 n)
142{
143 enum fe_status status;
144
145 dvb->fe[n]->ops.read_status(dvb->fe[n], &status);
146
147 return status == (FE_HAS_SIGNAL |
148 FE_HAS_CARRIER |
149 FE_HAS_VITERBI |
150 FE_HAS_SYNC |
151 FE_HAS_LOCK);
152}
153
154
155
156
157static void vidtv_bridge_on_new_pkts_avail(void *priv, u8 *buf, u32 npkts)
158{
159 struct vidtv_dvb *dvb = priv;
160
161
162 if (vidtv_bridge_check_demod_lock(dvb, 0))
163 dvb_dmx_swfilter_packets(&dvb->demux, buf, npkts);
164}
165
166static int vidtv_start_streaming(struct vidtv_dvb *dvb)
167{
168 struct vidtv_mux_init_args mux_args = {
169 .mux_rate_kbytes_sec = mux_rate_kbytes_sec,
170 .on_new_packets_available_cb = vidtv_bridge_on_new_pkts_avail,
171 .pcr_period_usecs = pcr_period_msec * USEC_PER_MSEC,
172 .si_period_usecs = si_period_msec * USEC_PER_MSEC,
173 .pcr_pid = pcr_pid,
174 .transport_stream_id = VIDTV_DEFAULT_TS_ID,
175 .network_id = VIDTV_DEFAULT_NETWORK_ID,
176 .network_name = VIDTV_DEFAULT_NETWORK_NAME,
177 .priv = dvb,
178 };
179 struct device *dev = &dvb->pdev->dev;
180 u32 mux_buf_sz;
181
182 if (dvb->streaming) {
183 dev_warn_ratelimited(dev, "Already streaming. Skipping.\n");
184 return 0;
185 }
186
187 if (mux_buf_sz_pkts)
188 mux_buf_sz = mux_buf_sz_pkts;
189 else
190 mux_buf_sz = vidtv_bridge_mux_buf_sz_for_mux_rate();
191
192 mux_args.mux_buf_sz = mux_buf_sz;
193
194 dvb->streaming = true;
195 dvb->mux = vidtv_mux_init(dvb->fe[0], dev, &mux_args);
196 if (!dvb->mux)
197 return -ENOMEM;
198 vidtv_mux_start_thread(dvb->mux);
199
200 dev_dbg_ratelimited(dev, "Started streaming\n");
201 return 0;
202}
203
204static int vidtv_stop_streaming(struct vidtv_dvb *dvb)
205{
206 struct device *dev = &dvb->pdev->dev;
207
208 dvb->streaming = false;
209 vidtv_mux_stop_thread(dvb->mux);
210 vidtv_mux_destroy(dvb->mux);
211 dvb->mux = NULL;
212
213 dev_dbg_ratelimited(dev, "Stopped streaming\n");
214 return 0;
215}
216
217static int vidtv_start_feed(struct dvb_demux_feed *feed)
218{
219 struct dvb_demux *demux = feed->demux;
220 struct vidtv_dvb *dvb = demux->priv;
221 int ret;
222 int rc;
223
224 if (!demux->dmx.frontend)
225 return -EINVAL;
226
227 mutex_lock(&dvb->feed_lock);
228
229 dvb->nfeeds++;
230 rc = dvb->nfeeds;
231
232 if (dvb->nfeeds == 1) {
233 ret = vidtv_start_streaming(dvb);
234 if (ret < 0)
235 rc = ret;
236 }
237
238 mutex_unlock(&dvb->feed_lock);
239 return rc;
240}
241
242static int vidtv_stop_feed(struct dvb_demux_feed *feed)
243{
244 struct dvb_demux *demux = feed->demux;
245 struct vidtv_dvb *dvb = demux->priv;
246 int err = 0;
247
248 mutex_lock(&dvb->feed_lock);
249 dvb->nfeeds--;
250
251 if (!dvb->nfeeds)
252 err = vidtv_stop_streaming(dvb);
253
254 mutex_unlock(&dvb->feed_lock);
255 return err;
256}
257
258static struct dvb_frontend *vidtv_get_frontend_ptr(struct i2c_client *c)
259{
260 struct vidtv_demod_state *state = i2c_get_clientdata(c);
261
262
263 return &state->frontend;
264}
265
266static int vidtv_master_xfer(struct i2c_adapter *i2c_adap,
267 struct i2c_msg msgs[],
268 int num)
269{
270
271
272
273
274
275 return 0;
276}
277
278static u32 vidtv_i2c_func(struct i2c_adapter *adapter)
279{
280 return I2C_FUNC_I2C;
281}
282
283static const struct i2c_algorithm vidtv_i2c_algorithm = {
284 .master_xfer = vidtv_master_xfer,
285 .functionality = vidtv_i2c_func,
286};
287
288static int vidtv_bridge_i2c_register_adap(struct vidtv_dvb *dvb)
289{
290 struct i2c_adapter *i2c_adapter = &dvb->i2c_adapter;
291
292 strscpy(i2c_adapter->name, "vidtv_i2c", sizeof(i2c_adapter->name));
293 i2c_adapter->owner = THIS_MODULE;
294 i2c_adapter->algo = &vidtv_i2c_algorithm;
295 i2c_adapter->algo_data = NULL;
296 i2c_adapter->timeout = 500;
297 i2c_adapter->retries = 3;
298 i2c_adapter->dev.parent = &dvb->pdev->dev;
299
300 i2c_set_adapdata(i2c_adapter, dvb);
301 return i2c_add_adapter(&dvb->i2c_adapter);
302}
303
304static int vidtv_bridge_register_adap(struct vidtv_dvb *dvb)
305{
306 int ret = 0;
307
308 ret = dvb_register_adapter(&dvb->adapter,
309 KBUILD_MODNAME,
310 THIS_MODULE,
311 &dvb->i2c_adapter.dev,
312 adapter_nums);
313
314 return ret;
315}
316
317static int vidtv_bridge_dmx_init(struct vidtv_dvb *dvb)
318{
319 dvb->demux.dmx.capabilities = DMX_TS_FILTERING |
320 DMX_SECTION_FILTERING;
321
322 dvb->demux.priv = dvb;
323 dvb->demux.filternum = 256;
324 dvb->demux.feednum = 256;
325 dvb->demux.start_feed = vidtv_start_feed;
326 dvb->demux.stop_feed = vidtv_stop_feed;
327
328 return dvb_dmx_init(&dvb->demux);
329}
330
331static int vidtv_bridge_dmxdev_init(struct vidtv_dvb *dvb)
332{
333 dvb->dmx_dev.filternum = 256;
334 dvb->dmx_dev.demux = &dvb->demux.dmx;
335 dvb->dmx_dev.capabilities = 0;
336
337 return dvb_dmxdev_init(&dvb->dmx_dev, &dvb->adapter);
338}
339
340static int vidtv_bridge_probe_demod(struct vidtv_dvb *dvb, u32 n)
341{
342 struct vidtv_demod_config cfg = {
343 .drop_tslock_prob_on_low_snr = drop_tslock_prob_on_low_snr,
344 .recover_tslock_prob_on_good_snr = recover_tslock_prob_on_good_snr,
345 };
346 dvb->i2c_client_demod[n] = dvb_module_probe("dvb_vidtv_demod",
347 NULL,
348 &dvb->i2c_adapter,
349 DEMOD_DEFAULT_ADDR,
350 &cfg);
351
352
353 if (!dvb->i2c_client_demod[n])
354 return -ENODEV;
355
356
357 dvb->fe[n] = vidtv_get_frontend_ptr(dvb->i2c_client_demod[n]);
358
359 return 0;
360}
361
362static int vidtv_bridge_probe_tuner(struct vidtv_dvb *dvb, u32 n)
363{
364 struct vidtv_tuner_config cfg = {
365 .fe = dvb->fe[n],
366 .mock_power_up_delay_msec = mock_power_up_delay_msec,
367 .mock_tune_delay_msec = mock_tune_delay_msec,
368 };
369 u32 freq;
370 int i;
371
372
373
374 memcpy(cfg.vidtv_valid_dvb_t_freqs,
375 vidtv_valid_dvb_t_freqs,
376 sizeof(vidtv_valid_dvb_t_freqs));
377
378 memcpy(cfg.vidtv_valid_dvb_c_freqs,
379 vidtv_valid_dvb_c_freqs,
380 sizeof(vidtv_valid_dvb_c_freqs));
381
382
383
384
385
386 for (i = 0; i < ARRAY_SIZE(vidtv_valid_dvb_s_freqs); i++) {
387 freq = vidtv_valid_dvb_s_freqs[i];
388 if (freq) {
389 if (freq < LNB_CUT_FREQUENCY)
390 freq = abs(freq - LNB_LOW_FREQ);
391 else
392 freq = abs(freq - LNB_HIGH_FREQ);
393 }
394 cfg.vidtv_valid_dvb_s_freqs[i] = freq;
395 }
396
397 cfg.max_frequency_shift_hz = max_frequency_shift_hz;
398
399 dvb->i2c_client_tuner[n] = dvb_module_probe("dvb_vidtv_tuner",
400 NULL,
401 &dvb->i2c_adapter,
402 TUNER_DEFAULT_ADDR,
403 &cfg);
404
405 return (dvb->i2c_client_tuner[n]) ? 0 : -ENODEV;
406}
407
408static int vidtv_bridge_dvb_init(struct vidtv_dvb *dvb)
409{
410 int ret, i, j;
411
412 ret = vidtv_bridge_i2c_register_adap(dvb);
413 if (ret < 0)
414 goto fail_i2c;
415
416 ret = vidtv_bridge_register_adap(dvb);
417 if (ret < 0)
418 goto fail_adapter;
419 dvb_register_media_controller(&dvb->adapter, &dvb->mdev);
420
421 for (i = 0; i < NUM_FE; ++i) {
422 ret = vidtv_bridge_probe_demod(dvb, i);
423 if (ret < 0)
424 goto fail_demod_probe;
425
426 ret = vidtv_bridge_probe_tuner(dvb, i);
427 if (ret < 0)
428 goto fail_tuner_probe;
429
430 ret = dvb_register_frontend(&dvb->adapter, dvb->fe[i]);
431 if (ret < 0)
432 goto fail_fe;
433 }
434
435 ret = vidtv_bridge_dmx_init(dvb);
436 if (ret < 0)
437 goto fail_dmx;
438
439 ret = vidtv_bridge_dmxdev_init(dvb);
440 if (ret < 0)
441 goto fail_dmx_dev;
442
443 for (j = 0; j < NUM_FE; ++j) {
444 ret = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx,
445 &dvb->dmx_fe[j]);
446 if (ret < 0)
447 goto fail_dmx_conn;
448
449
450
451
452
453 dvb->dmx_fe[j].source = DMX_FRONTEND_0;
454 }
455
456 return ret;
457
458fail_dmx_conn:
459 for (j = j - 1; j >= 0; --j)
460 dvb->demux.dmx.remove_frontend(&dvb->demux.dmx,
461 &dvb->dmx_fe[j]);
462fail_dmx_dev:
463 dvb_dmxdev_release(&dvb->dmx_dev);
464fail_dmx:
465 dvb_dmx_release(&dvb->demux);
466fail_fe:
467 for (j = i; j >= 0; --j)
468 dvb_unregister_frontend(dvb->fe[j]);
469fail_tuner_probe:
470 for (j = i; j >= 0; --j)
471 if (dvb->i2c_client_tuner[j])
472 dvb_module_release(dvb->i2c_client_tuner[j]);
473
474fail_demod_probe:
475 for (j = i; j >= 0; --j)
476 if (dvb->i2c_client_demod[j])
477 dvb_module_release(dvb->i2c_client_demod[j]);
478
479fail_adapter:
480 dvb_unregister_adapter(&dvb->adapter);
481
482fail_i2c:
483 i2c_del_adapter(&dvb->i2c_adapter);
484
485 return ret;
486}
487
488static int vidtv_bridge_probe(struct platform_device *pdev)
489{
490 struct vidtv_dvb *dvb;
491 int ret;
492
493 dvb = kzalloc(sizeof(*dvb), GFP_KERNEL);
494 if (!dvb)
495 return -ENOMEM;
496
497 dvb->pdev = pdev;
498
499#ifdef CONFIG_MEDIA_CONTROLLER_DVB
500 dvb->mdev.dev = &pdev->dev;
501
502 strscpy(dvb->mdev.model, "vidtv", sizeof(dvb->mdev.model));
503 strscpy(dvb->mdev.bus_info, "platform:vidtv", sizeof(dvb->mdev.bus_info));
504
505 media_device_init(&dvb->mdev);
506#endif
507
508 ret = vidtv_bridge_dvb_init(dvb);
509 if (ret < 0)
510 goto err_dvb;
511
512 mutex_init(&dvb->feed_lock);
513
514 platform_set_drvdata(pdev, dvb);
515
516#ifdef CONFIG_MEDIA_CONTROLLER_DVB
517 ret = media_device_register(&dvb->mdev);
518 if (ret) {
519 dev_err(dvb->mdev.dev,
520 "media device register failed (err=%d)\n", ret);
521 goto err_media_device_register;
522 }
523#endif
524
525 dev_info(&pdev->dev, "Successfully initialized vidtv!\n");
526 return ret;
527
528#ifdef CONFIG_MEDIA_CONTROLLER_DVB
529err_media_device_register:
530 media_device_cleanup(&dvb->mdev);
531#endif
532err_dvb:
533 kfree(dvb);
534 return ret;
535}
536
537static int vidtv_bridge_remove(struct platform_device *pdev)
538{
539 struct vidtv_dvb *dvb;
540 u32 i;
541
542 dvb = platform_get_drvdata(pdev);
543
544#ifdef CONFIG_MEDIA_CONTROLLER_DVB
545 media_device_unregister(&dvb->mdev);
546 media_device_cleanup(&dvb->mdev);
547#endif
548
549 mutex_destroy(&dvb->feed_lock);
550
551 for (i = 0; i < NUM_FE; ++i) {
552 dvb_unregister_frontend(dvb->fe[i]);
553 dvb_module_release(dvb->i2c_client_tuner[i]);
554 dvb_module_release(dvb->i2c_client_demod[i]);
555 }
556
557 dvb_dmxdev_release(&dvb->dmx_dev);
558 dvb_dmx_release(&dvb->demux);
559 dvb_unregister_adapter(&dvb->adapter);
560 dev_info(&pdev->dev, "Successfully removed vidtv\n");
561
562 return 0;
563}
564
565static void vidtv_bridge_dev_release(struct device *dev)
566{
567}
568
569static struct platform_device vidtv_bridge_dev = {
570 .name = VIDTV_PDEV_NAME,
571 .dev.release = vidtv_bridge_dev_release,
572};
573
574static struct platform_driver vidtv_bridge_driver = {
575 .driver = {
576 .name = VIDTV_PDEV_NAME,
577 },
578 .probe = vidtv_bridge_probe,
579 .remove = vidtv_bridge_remove,
580};
581
582static void __exit vidtv_bridge_exit(void)
583{
584 platform_driver_unregister(&vidtv_bridge_driver);
585 platform_device_unregister(&vidtv_bridge_dev);
586}
587
588static int __init vidtv_bridge_init(void)
589{
590 int ret;
591
592 ret = platform_device_register(&vidtv_bridge_dev);
593 if (ret)
594 return ret;
595
596 ret = platform_driver_register(&vidtv_bridge_driver);
597 if (ret)
598 platform_device_unregister(&vidtv_bridge_dev);
599
600 return ret;
601}
602
603module_init(vidtv_bridge_init);
604module_exit(vidtv_bridge_exit);
605
606MODULE_DESCRIPTION("Virtual Digital TV Test Driver");
607MODULE_AUTHOR("Daniel W. S. Almeida");
608MODULE_LICENSE("GPL");
609MODULE_ALIAS("vidtv");
610MODULE_ALIAS("dvb_vidtv");
611
