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path: root/drivers/media/video/tlg2300/pd-dvb.c
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Diffstat (limited to 'drivers/media/video/tlg2300/pd-dvb.c')
-rw-r--r--drivers/media/video/tlg2300/pd-dvb.c593
1 files changed, 593 insertions, 0 deletions
diff --git a/drivers/media/video/tlg2300/pd-dvb.c b/drivers/media/video/tlg2300/pd-dvb.c
new file mode 100644
index 000000000000..4133aee568bf
--- /dev/null
+++ b/drivers/media/video/tlg2300/pd-dvb.c
@@ -0,0 +1,593 @@
1#include "pd-common.h"
2#include <linux/kernel.h>
3#include <linux/usb.h>
4#include <linux/dvb/dmx.h>
5#include <linux/delay.h>
6
7#include "vendorcmds.h"
8#include <linux/sched.h>
9#include <asm/atomic.h>
10
11static void dvb_urb_cleanup(struct pd_dvb_adapter *pd_dvb);
12
13static int dvb_bandwidth[][2] = {
14 { TLG_BW_8, BANDWIDTH_8_MHZ },
15 { TLG_BW_7, BANDWIDTH_7_MHZ },
16 { TLG_BW_6, BANDWIDTH_6_MHZ }
17};
18static int dvb_bandwidth_length = ARRAY_SIZE(dvb_bandwidth);
19
20static s32 dvb_start_streaming(struct pd_dvb_adapter *pd_dvb);
21static int poseidon_check_mode_dvbt(struct poseidon *pd)
22{
23 s32 ret = 0, cmd_status = 0;
24
25 set_current_state(TASK_INTERRUPTIBLE);
26 schedule_timeout(HZ/4);
27
28 ret = usb_set_interface(pd->udev, 0, BULK_ALTERNATE_IFACE);
29 if (ret != 0)
30 return ret;
31
32 ret = set_tuner_mode(pd, TLG_MODE_CAPS_DVB_T);
33 if (ret)
34 return ret;
35
36 /* signal source */
37 ret = send_set_req(pd, SGNL_SRC_SEL, TLG_SIG_SRC_ANTENNA, &cmd_status);
38 if (ret|cmd_status)
39 return ret;
40
41 return 0;
42}
43
44/* acquire :
45 * 1 == open
46 * 0 == release
47 */
48static int poseidon_ts_bus_ctrl(struct dvb_frontend *fe, int acquire)
49{
50 struct poseidon *pd = fe->demodulator_priv;
51 struct pd_dvb_adapter *pd_dvb;
52 int ret = 0;
53
54 if (!pd)
55 return -ENODEV;
56
57 pd_dvb = container_of(fe, struct pd_dvb_adapter, dvb_fe);
58 if (acquire) {
59 mutex_lock(&pd->lock);
60 if (pd->state & POSEIDON_STATE_DISCONNECT) {
61 ret = -ENODEV;
62 goto open_out;
63 }
64
65 if (pd->state && !(pd->state & POSEIDON_STATE_DVBT)) {
66 ret = -EBUSY;
67 goto open_out;
68 }
69
70 usb_autopm_get_interface(pd->interface);
71 if (0 == pd->state) {
72 ret = poseidon_check_mode_dvbt(pd);
73 if (ret < 0) {
74 usb_autopm_put_interface(pd->interface);
75 goto open_out;
76 }
77 pd->state |= POSEIDON_STATE_DVBT;
78 pd_dvb->bandwidth = 0;
79 pd_dvb->prev_freq = 0;
80 }
81 atomic_inc(&pd_dvb->users);
82 kref_get(&pd->kref);
83open_out:
84 mutex_unlock(&pd->lock);
85 } else {
86 dvb_stop_streaming(pd_dvb);
87
88 if (atomic_dec_and_test(&pd_dvb->users)) {
89 mutex_lock(&pd->lock);
90 pd->state &= ~POSEIDON_STATE_DVBT;
91 mutex_unlock(&pd->lock);
92 }
93 kref_put(&pd->kref, poseidon_delete);
94 usb_autopm_put_interface(pd->interface);
95 }
96 return ret;
97}
98
99static void poseidon_fe_release(struct dvb_frontend *fe)
100{
101 struct poseidon *pd = fe->demodulator_priv;
102
103#ifdef CONFIG_PM
104 pd->pm_suspend = NULL;
105 pd->pm_resume = NULL;
106#endif
107}
108
109static s32 poseidon_fe_sleep(struct dvb_frontend *fe)
110{
111 return 0;
112}
113
114/*
115 * return true if we can satisfy the conditions, else return false.
116 */
117static bool check_scan_ok(__u32 freq, int bandwidth,
118 struct pd_dvb_adapter *adapter)
119{
120 if (bandwidth < 0)
121 return false;
122
123 if (adapter->prev_freq == freq
124 && adapter->bandwidth == bandwidth) {
125 long nl = jiffies - adapter->last_jiffies;
126 unsigned int msec ;
127
128 msec = jiffies_to_msecs(abs(nl));
129 return msec > 15000 ? true : false;
130 }
131 return true;
132}
133
134/*
135 * Check if the firmware delays too long for an invalid frequency.
136 */
137static int fw_delay_overflow(struct pd_dvb_adapter *adapter)
138{
139 long nl = jiffies - adapter->last_jiffies;
140 unsigned int msec ;
141
142 msec = jiffies_to_msecs(abs(nl));
143 return msec > 800 ? true : false;
144}
145
146static int poseidon_set_fe(struct dvb_frontend *fe,
147 struct dvb_frontend_parameters *fep)
148{
149 s32 ret = 0, cmd_status = 0;
150 s32 i, bandwidth = -1;
151 struct poseidon *pd = fe->demodulator_priv;
152 struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
153
154 if (in_hibernation(pd))
155 return -EBUSY;
156
157 mutex_lock(&pd->lock);
158 for (i = 0; i < dvb_bandwidth_length; i++)
159 if (fep->u.ofdm.bandwidth == dvb_bandwidth[i][1])
160 bandwidth = dvb_bandwidth[i][0];
161
162 if (check_scan_ok(fep->frequency, bandwidth, pd_dvb)) {
163 ret = send_set_req(pd, TUNE_FREQ_SELECT,
164 fep->frequency / 1000, &cmd_status);
165 if (ret | cmd_status) {
166 log("error line");
167 goto front_out;
168 }
169
170 ret = send_set_req(pd, DVBT_BANDW_SEL,
171 bandwidth, &cmd_status);
172 if (ret | cmd_status) {
173 log("error line");
174 goto front_out;
175 }
176
177 ret = send_set_req(pd, TAKE_REQUEST, 0, &cmd_status);
178 if (ret | cmd_status) {
179 log("error line");
180 goto front_out;
181 }
182
183 /* save the context for future */
184 memcpy(&pd_dvb->fe_param, fep, sizeof(*fep));
185 pd_dvb->bandwidth = bandwidth;
186 pd_dvb->prev_freq = fep->frequency;
187 pd_dvb->last_jiffies = jiffies;
188 }
189front_out:
190 mutex_unlock(&pd->lock);
191 return ret;
192}
193
194#ifdef CONFIG_PM
195static int pm_dvb_suspend(struct poseidon *pd)
196{
197 struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
198 dvb_stop_streaming(pd_dvb);
199 dvb_urb_cleanup(pd_dvb);
200 msleep(500);
201 return 0;
202}
203
204static int pm_dvb_resume(struct poseidon *pd)
205{
206 struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
207
208 poseidon_check_mode_dvbt(pd);
209 msleep(300);
210 poseidon_set_fe(&pd_dvb->dvb_fe, &pd_dvb->fe_param);
211
212 dvb_start_streaming(pd_dvb);
213 return 0;
214}
215#endif
216
217static s32 poseidon_fe_init(struct dvb_frontend *fe)
218{
219 struct poseidon *pd = fe->demodulator_priv;
220 struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
221
222#ifdef CONFIG_PM
223 pd->pm_suspend = pm_dvb_suspend;
224 pd->pm_resume = pm_dvb_resume;
225#endif
226 memset(&pd_dvb->fe_param, 0,
227 sizeof(struct dvb_frontend_parameters));
228 return 0;
229}
230
231static int poseidon_get_fe(struct dvb_frontend *fe,
232 struct dvb_frontend_parameters *fep)
233{
234 struct poseidon *pd = fe->demodulator_priv;
235 struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
236
237 memcpy(fep, &pd_dvb->fe_param, sizeof(*fep));
238 return 0;
239}
240
241static int poseidon_fe_get_tune_settings(struct dvb_frontend *fe,
242 struct dvb_frontend_tune_settings *tune)
243{
244 tune->min_delay_ms = 1000;
245 return 0;
246}
247
248static int poseidon_read_status(struct dvb_frontend *fe, fe_status_t *stat)
249{
250 struct poseidon *pd = fe->demodulator_priv;
251 s32 ret = -1, cmd_status;
252 struct tuner_dtv_sig_stat_s status = {};
253
254 if (in_hibernation(pd))
255 return -EBUSY;
256 mutex_lock(&pd->lock);
257
258 ret = send_get_req(pd, TUNER_STATUS, TLG_MODE_DVB_T,
259 &status, &cmd_status, sizeof(status));
260 if (ret | cmd_status) {
261 log("get tuner status error");
262 goto out;
263 }
264
265 if (debug_mode)
266 log("P : %d, L %d, LB :%d", status.sig_present,
267 status.sig_locked, status.sig_lock_busy);
268
269 if (status.sig_lock_busy) {
270 goto out;
271 } else if (status.sig_present || status.sig_locked) {
272 *stat |= FE_HAS_LOCK | FE_HAS_SIGNAL | FE_HAS_CARRIER
273 | FE_HAS_SYNC | FE_HAS_VITERBI;
274 } else {
275 if (fw_delay_overflow(&pd->dvb_data))
276 *stat |= FE_TIMEDOUT;
277 }
278out:
279 mutex_unlock(&pd->lock);
280 return ret;
281}
282
283static int poseidon_read_ber(struct dvb_frontend *fe, u32 *ber)
284{
285 struct poseidon *pd = fe->demodulator_priv;
286 struct tuner_ber_rate_s tlg_ber = {};
287 s32 ret = -1, cmd_status;
288
289 mutex_lock(&pd->lock);
290 ret = send_get_req(pd, TUNER_BER_RATE, 0,
291 &tlg_ber, &cmd_status, sizeof(tlg_ber));
292 if (ret | cmd_status)
293 goto out;
294 *ber = tlg_ber.ber_rate;
295out:
296 mutex_unlock(&pd->lock);
297 return ret;
298}
299
300static s32 poseidon_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
301{
302 struct poseidon *pd = fe->demodulator_priv;
303 struct tuner_dtv_sig_stat_s status = {};
304 s32 ret = 0, cmd_status;
305
306 mutex_lock(&pd->lock);
307 ret = send_get_req(pd, TUNER_STATUS, TLG_MODE_DVB_T,
308 &status, &cmd_status, sizeof(status));
309 if (ret | cmd_status)
310 goto out;
311 if ((status.sig_present || status.sig_locked) && !status.sig_strength)
312 *strength = 0xFFFF;
313 else
314 *strength = status.sig_strength;
315out:
316 mutex_unlock(&pd->lock);
317 return ret;
318}
319
320static int poseidon_read_snr(struct dvb_frontend *fe, u16 *snr)
321{
322 return 0;
323}
324
325static int poseidon_read_unc_blocks(struct dvb_frontend *fe, u32 *unc)
326{
327 *unc = 0;
328 return 0;
329}
330
331static struct dvb_frontend_ops poseidon_frontend_ops = {
332 .info = {
333 .name = "Poseidon DVB-T",
334 .type = FE_OFDM,
335 .frequency_min = 174000000,
336 .frequency_max = 862000000,
337 .frequency_stepsize = 62500,/* FIXME */
338 .caps = FE_CAN_INVERSION_AUTO |
339 FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
340 FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
341 FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
342 FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
343 FE_CAN_GUARD_INTERVAL_AUTO |
344 FE_CAN_RECOVER |
345 FE_CAN_HIERARCHY_AUTO,
346 },
347
348 .release = poseidon_fe_release,
349
350 .init = poseidon_fe_init,
351 .sleep = poseidon_fe_sleep,
352
353 .set_frontend = poseidon_set_fe,
354 .get_frontend = poseidon_get_fe,
355 .get_tune_settings = poseidon_fe_get_tune_settings,
356
357 .read_status = poseidon_read_status,
358 .read_ber = poseidon_read_ber,
359 .read_signal_strength = poseidon_read_signal_strength,
360 .read_snr = poseidon_read_snr,
361 .read_ucblocks = poseidon_read_unc_blocks,
362
363 .ts_bus_ctrl = poseidon_ts_bus_ctrl,
364};
365
366static void dvb_urb_irq(struct urb *urb)
367{
368 struct pd_dvb_adapter *pd_dvb = urb->context;
369 int len = urb->transfer_buffer_length;
370 struct dvb_demux *demux = &pd_dvb->demux;
371 s32 ret;
372
373 if (!pd_dvb->is_streaming || urb->status) {
374 if (urb->status == -EPROTO)
375 goto resend;
376 return;
377 }
378
379 if (urb->actual_length == len)
380 dvb_dmx_swfilter(demux, urb->transfer_buffer, len);
381 else if (urb->actual_length == len - 4) {
382 int offset;
383 u8 *buf = urb->transfer_buffer;
384
385 /*
386 * The packet size is 512,
387 * last packet contains 456 bytes tsp data
388 */
389 for (offset = 456; offset < len; offset += 512) {
390 if (!strncmp(buf + offset, "DVHS", 4)) {
391 dvb_dmx_swfilter(demux, buf, offset);
392 if (len > offset + 52 + 4) {
393 /*16 bytes trailer + 36 bytes padding */
394 buf += offset + 52;
395 len -= offset + 52 + 4;
396 dvb_dmx_swfilter(demux, buf, len);
397 }
398 break;
399 }
400 }
401 }
402
403resend:
404 ret = usb_submit_urb(urb, GFP_ATOMIC);
405 if (ret)
406 log(" usb_submit_urb failed: error %d", ret);
407}
408
409static int dvb_urb_init(struct pd_dvb_adapter *pd_dvb)
410{
411 if (pd_dvb->urb_array[0])
412 return 0;
413
414 alloc_bulk_urbs_generic(pd_dvb->urb_array, DVB_SBUF_NUM,
415 pd_dvb->pd_device->udev, pd_dvb->ep_addr,
416 DVB_URB_BUF_SIZE, GFP_KERNEL,
417 dvb_urb_irq, pd_dvb);
418 return 0;
419}
420
421static void dvb_urb_cleanup(struct pd_dvb_adapter *pd_dvb)
422{
423 free_all_urb_generic(pd_dvb->urb_array, DVB_SBUF_NUM);
424}
425
426static s32 dvb_start_streaming(struct pd_dvb_adapter *pd_dvb)
427{
428 struct poseidon *pd = pd_dvb->pd_device;
429 int ret = 0;
430
431 if (pd->state & POSEIDON_STATE_DISCONNECT)
432 return -ENODEV;
433
434 mutex_lock(&pd->lock);
435 if (!pd_dvb->is_streaming) {
436 s32 i, cmd_status = 0;
437 /*
438 * Once upon a time, there was a difficult bug lying here.
439 * ret = send_set_req(pd, TAKE_REQUEST, 0, &cmd_status);
440 */
441
442 ret = send_set_req(pd, PLAY_SERVICE, 1, &cmd_status);
443 if (ret | cmd_status)
444 goto out;
445
446 ret = dvb_urb_init(pd_dvb);
447 if (ret < 0)
448 goto out;
449
450 pd_dvb->is_streaming = 1;
451 for (i = 0; i < DVB_SBUF_NUM; i++) {
452 ret = usb_submit_urb(pd_dvb->urb_array[i],
453 GFP_KERNEL);
454 if (ret) {
455 log(" submit urb error %d", ret);
456 goto out;
457 }
458 }
459 }
460out:
461 mutex_unlock(&pd->lock);
462 return ret;
463}
464
465void dvb_stop_streaming(struct pd_dvb_adapter *pd_dvb)
466{
467 struct poseidon *pd = pd_dvb->pd_device;
468
469 mutex_lock(&pd->lock);
470 if (pd_dvb->is_streaming) {
471 s32 i, ret, cmd_status = 0;
472
473 pd_dvb->is_streaming = 0;
474
475 for (i = 0; i < DVB_SBUF_NUM; i++)
476 if (pd_dvb->urb_array[i])
477 usb_kill_urb(pd_dvb->urb_array[i]);
478
479 ret = send_set_req(pd, PLAY_SERVICE, TLG_TUNE_PLAY_SVC_STOP,
480 &cmd_status);
481 if (ret | cmd_status)
482 log("error");
483 }
484 mutex_unlock(&pd->lock);
485}
486
487static int pd_start_feed(struct dvb_demux_feed *feed)
488{
489 struct pd_dvb_adapter *pd_dvb = feed->demux->priv;
490 int ret = 0;
491
492 if (!pd_dvb)
493 return -1;
494 if (atomic_inc_return(&pd_dvb->active_feed) == 1)
495 ret = dvb_start_streaming(pd_dvb);
496 return ret;
497}
498
499static int pd_stop_feed(struct dvb_demux_feed *feed)
500{
501 struct pd_dvb_adapter *pd_dvb = feed->demux->priv;
502
503 if (!pd_dvb)
504 return -1;
505 if (atomic_dec_and_test(&pd_dvb->active_feed))
506 dvb_stop_streaming(pd_dvb);
507 return 0;
508}
509
510DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
511int pd_dvb_usb_device_init(struct poseidon *pd)
512{
513 struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
514 struct dvb_demux *dvbdemux;
515 int ret = 0;
516
517 pd_dvb->ep_addr = 0x82;
518 atomic_set(&pd_dvb->users, 0);
519 atomic_set(&pd_dvb->active_feed, 0);
520 pd_dvb->pd_device = pd;
521
522 ret = dvb_register_adapter(&pd_dvb->dvb_adap,
523 "Poseidon dvbt adapter",
524 THIS_MODULE,
525 NULL /* for hibernation correctly*/,
526 adapter_nr);
527 if (ret < 0)
528 goto error1;
529
530 /* register frontend */
531 pd_dvb->dvb_fe.demodulator_priv = pd;
532 memcpy(&pd_dvb->dvb_fe.ops, &poseidon_frontend_ops,
533 sizeof(struct dvb_frontend_ops));
534 ret = dvb_register_frontend(&pd_dvb->dvb_adap, &pd_dvb->dvb_fe);
535 if (ret < 0)
536 goto error2;
537
538 /* register demux device */
539 dvbdemux = &pd_dvb->demux;
540 dvbdemux->dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
541 dvbdemux->priv = pd_dvb;
542 dvbdemux->feednum = dvbdemux->filternum = 64;
543 dvbdemux->start_feed = pd_start_feed;
544 dvbdemux->stop_feed = pd_stop_feed;
545 dvbdemux->write_to_decoder = NULL;
546
547 ret = dvb_dmx_init(dvbdemux);
548 if (ret < 0)
549 goto error3;
550
551 pd_dvb->dmxdev.filternum = pd_dvb->demux.filternum;
552 pd_dvb->dmxdev.demux = &pd_dvb->demux.dmx;
553 pd_dvb->dmxdev.capabilities = 0;
554
555 ret = dvb_dmxdev_init(&pd_dvb->dmxdev, &pd_dvb->dvb_adap);
556 if (ret < 0)
557 goto error3;
558 return 0;
559
560error3:
561 dvb_unregister_frontend(&pd_dvb->dvb_fe);
562error2:
563 dvb_unregister_adapter(&pd_dvb->dvb_adap);
564error1:
565 return ret;
566}
567
568void pd_dvb_usb_device_exit(struct poseidon *pd)
569{
570 struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
571
572 while (atomic_read(&pd_dvb->users) != 0
573 || atomic_read(&pd_dvb->active_feed) != 0) {
574 set_current_state(TASK_INTERRUPTIBLE);
575 schedule_timeout(HZ);
576 }
577 dvb_dmxdev_release(&pd_dvb->dmxdev);
578 dvb_unregister_frontend(&pd_dvb->dvb_fe);
579 dvb_unregister_adapter(&pd_dvb->dvb_adap);
580 pd_dvb_usb_device_cleanup(pd);
581}
582
583void pd_dvb_usb_device_cleanup(struct poseidon *pd)
584{
585 struct pd_dvb_adapter *pd_dvb = &pd->dvb_data;
586
587 dvb_urb_cleanup(pd_dvb);
588}
589
590int pd_dvb_get_adapter_num(struct pd_dvb_adapter *pd_dvb)
591{
592 return pd_dvb->dvb_adap.num;
593}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-26 21:09:50 -0500