1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /****************************************************************
3 
4 Siano Mobile Silicon, Inc.
5 MDTV receiver kernel modules.
6 Copyright (C) 2006-2008, Uri Shkolnik
7 
8 
9 ****************************************************************/
10 
11 #include "smscoreapi.h"
12 
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/init.h>
16 #include <asm/div64.h>
17 
18 #include <media/dmxdev.h>
19 #include <media/dvbdev.h>
20 #include <media/dvb_demux.h>
21 #include <media/dvb_frontend.h>
22 
23 #include "sms-cards.h"
24 
25 #include "smsdvb.h"
26 
27 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
28 
29 static LIST_HEAD(g_smsdvb_clients);
30 static DEFINE_MUTEX(g_smsdvb_clientslock);
31 
32 static u32 sms_to_guard_interval_table[] = {
33 	[0] = GUARD_INTERVAL_1_32,
34 	[1] = GUARD_INTERVAL_1_16,
35 	[2] = GUARD_INTERVAL_1_8,
36 	[3] = GUARD_INTERVAL_1_4,
37 };
38 
39 static u32 sms_to_code_rate_table[] = {
40 	[0] = FEC_1_2,
41 	[1] = FEC_2_3,
42 	[2] = FEC_3_4,
43 	[3] = FEC_5_6,
44 	[4] = FEC_7_8,
45 };
46 
47 
48 static u32 sms_to_hierarchy_table[] = {
49 	[0] = HIERARCHY_NONE,
50 	[1] = HIERARCHY_1,
51 	[2] = HIERARCHY_2,
52 	[3] = HIERARCHY_4,
53 };
54 
55 static u32 sms_to_modulation_table[] = {
56 	[0] = QPSK,
57 	[1] = QAM_16,
58 	[2] = QAM_64,
59 	[3] = DQPSK,
60 };
61 
62 
63 /* Events that may come from DVB v3 adapter */
64 static void sms_board_dvb3_event(struct smsdvb_client_t *client,
65 		enum SMS_DVB3_EVENTS event) {
66 
67 	struct smscore_device_t *coredev = client->coredev;
68 	switch (event) {
69 	case DVB3_EVENT_INIT:
70 		pr_debug("DVB3_EVENT_INIT\n");
71 		sms_board_event(coredev, BOARD_EVENT_BIND);
72 		break;
73 	case DVB3_EVENT_SLEEP:
74 		pr_debug("DVB3_EVENT_SLEEP\n");
75 		sms_board_event(coredev, BOARD_EVENT_POWER_SUSPEND);
76 		break;
77 	case DVB3_EVENT_HOTPLUG:
78 		pr_debug("DVB3_EVENT_HOTPLUG\n");
79 		sms_board_event(coredev, BOARD_EVENT_POWER_INIT);
80 		break;
81 	case DVB3_EVENT_FE_LOCK:
82 		if (client->event_fe_state != DVB3_EVENT_FE_LOCK) {
83 			client->event_fe_state = DVB3_EVENT_FE_LOCK;
84 			pr_debug("DVB3_EVENT_FE_LOCK\n");
85 			sms_board_event(coredev, BOARD_EVENT_FE_LOCK);
86 		}
87 		break;
88 	case DVB3_EVENT_FE_UNLOCK:
89 		if (client->event_fe_state != DVB3_EVENT_FE_UNLOCK) {
90 			client->event_fe_state = DVB3_EVENT_FE_UNLOCK;
91 			pr_debug("DVB3_EVENT_FE_UNLOCK\n");
92 			sms_board_event(coredev, BOARD_EVENT_FE_UNLOCK);
93 		}
94 		break;
95 	case DVB3_EVENT_UNC_OK:
96 		if (client->event_unc_state != DVB3_EVENT_UNC_OK) {
97 			client->event_unc_state = DVB3_EVENT_UNC_OK;
98 			pr_debug("DVB3_EVENT_UNC_OK\n");
99 			sms_board_event(coredev, BOARD_EVENT_MULTIPLEX_OK);
100 		}
101 		break;
102 	case DVB3_EVENT_UNC_ERR:
103 		if (client->event_unc_state != DVB3_EVENT_UNC_ERR) {
104 			client->event_unc_state = DVB3_EVENT_UNC_ERR;
105 			pr_debug("DVB3_EVENT_UNC_ERR\n");
106 			sms_board_event(coredev, BOARD_EVENT_MULTIPLEX_ERRORS);
107 		}
108 		break;
109 
110 	default:
111 		pr_err("Unknown dvb3 api event\n");
112 		break;
113 	}
114 }
115 
116 static void smsdvb_stats_not_ready(struct dvb_frontend *fe)
117 {
118 	struct smsdvb_client_t *client =
119 		container_of(fe, struct smsdvb_client_t, frontend);
120 	struct smscore_device_t *coredev = client->coredev;
121 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
122 	int i, n_layers;
123 
124 	switch (smscore_get_device_mode(coredev)) {
125 	case DEVICE_MODE_ISDBT:
126 	case DEVICE_MODE_ISDBT_BDA:
127 		n_layers = 4;
128 		break;
129 	default:
130 		n_layers = 1;
131 	}
132 
133 	/* Global stats */
134 	c->strength.len = 1;
135 	c->cnr.len = 1;
136 	c->strength.stat[0].scale = FE_SCALE_DECIBEL;
137 	c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
138 
139 	/* Per-layer stats */
140 	c->post_bit_error.len = n_layers;
141 	c->post_bit_count.len = n_layers;
142 	c->block_error.len = n_layers;
143 	c->block_count.len = n_layers;
144 
145 	/*
146 	 * Put all of them at FE_SCALE_NOT_AVAILABLE. They're dynamically
147 	 * changed when the stats become available.
148 	 */
149 	for (i = 0; i < n_layers; i++) {
150 		c->post_bit_error.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
151 		c->post_bit_count.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
152 		c->block_error.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
153 		c->block_count.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
154 	}
155 }
156 
157 static inline int sms_to_mode(u32 mode)
158 {
159 	switch (mode) {
160 	case 2:
161 		return TRANSMISSION_MODE_2K;
162 	case 4:
163 		return TRANSMISSION_MODE_4K;
164 	case 8:
165 		return TRANSMISSION_MODE_8K;
166 	}
167 	return TRANSMISSION_MODE_AUTO;
168 }
169 
170 static inline int sms_to_isdbt_mode(u32 mode)
171 {
172 	switch (mode) {
173 	case 1:
174 		return TRANSMISSION_MODE_2K;
175 	case 2:
176 		return TRANSMISSION_MODE_4K;
177 	case 3:
178 		return TRANSMISSION_MODE_8K;
179 	}
180 	return TRANSMISSION_MODE_AUTO;
181 }
182 
183 static inline int sms_to_isdbt_guard_interval(u32 interval)
184 {
185 	switch (interval) {
186 	case 4:
187 		return GUARD_INTERVAL_1_4;
188 	case 8:
189 		return GUARD_INTERVAL_1_8;
190 	case 16:
191 		return GUARD_INTERVAL_1_16;
192 	case 32:
193 		return GUARD_INTERVAL_1_32;
194 	}
195 	return GUARD_INTERVAL_AUTO;
196 }
197 
198 static inline int sms_to_status(u32 is_demod_locked, u32 is_rf_locked)
199 {
200 	if (is_demod_locked)
201 		return FE_HAS_SIGNAL  | FE_HAS_CARRIER | FE_HAS_VITERBI |
202 		       FE_HAS_SYNC    | FE_HAS_LOCK;
203 
204 	if (is_rf_locked)
205 		return FE_HAS_SIGNAL | FE_HAS_CARRIER;
206 
207 	return 0;
208 }
209 
210 static inline u32 sms_to_bw(u32 value)
211 {
212 	return value * 1000000;
213 }
214 
215 #define convert_from_table(value, table, defval) ({			\
216 	u32 __ret;							\
217 	if (value < ARRAY_SIZE(table))					\
218 		__ret = table[value];					\
219 	else								\
220 		__ret = defval;						\
221 	__ret;								\
222 })
223 
224 #define sms_to_guard_interval(value)					\
225 	convert_from_table(value, sms_to_guard_interval_table,		\
226 			   GUARD_INTERVAL_AUTO);
227 
228 #define sms_to_code_rate(value)						\
229 	convert_from_table(value, sms_to_code_rate_table,		\
230 			   FEC_NONE);
231 
232 #define sms_to_hierarchy(value)						\
233 	convert_from_table(value, sms_to_hierarchy_table,		\
234 			   FEC_NONE);
235 
236 #define sms_to_modulation(value)					\
237 	convert_from_table(value, sms_to_modulation_table,		\
238 			   FEC_NONE);
239 
240 static void smsdvb_update_tx_params(struct smsdvb_client_t *client,
241 				    struct sms_tx_stats *p)
242 {
243 	struct dvb_frontend *fe = &client->frontend;
244 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
245 
246 	c->frequency = p->frequency;
247 	client->fe_status = sms_to_status(p->is_demod_locked, 0);
248 	c->bandwidth_hz = sms_to_bw(p->bandwidth);
249 	c->transmission_mode = sms_to_mode(p->transmission_mode);
250 	c->guard_interval = sms_to_guard_interval(p->guard_interval);
251 	c->code_rate_HP = sms_to_code_rate(p->code_rate);
252 	c->code_rate_LP = sms_to_code_rate(p->lp_code_rate);
253 	c->hierarchy = sms_to_hierarchy(p->hierarchy);
254 	c->modulation = sms_to_modulation(p->constellation);
255 }
256 
257 static void smsdvb_update_per_slices(struct smsdvb_client_t *client,
258 				     struct RECEPTION_STATISTICS_PER_SLICES_S *p)
259 {
260 	struct dvb_frontend *fe = &client->frontend;
261 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
262 	u64 tmp;
263 
264 	client->fe_status = sms_to_status(p->is_demod_locked, p->is_rf_locked);
265 	c->modulation = sms_to_modulation(p->constellation);
266 
267 	/* signal Strength, in DBm */
268 	c->strength.stat[0].uvalue = p->in_band_power * 1000;
269 
270 	/* Carrier to noise ratio, in DB */
271 	c->cnr.stat[0].svalue = p->snr * 1000;
272 
273 	/* PER/BER requires demod lock */
274 	if (!p->is_demod_locked)
275 		return;
276 
277 	/* TS PER */
278 	client->last_per = c->block_error.stat[0].uvalue;
279 	c->block_error.stat[0].scale = FE_SCALE_COUNTER;
280 	c->block_count.stat[0].scale = FE_SCALE_COUNTER;
281 	c->block_error.stat[0].uvalue += p->ets_packets;
282 	c->block_count.stat[0].uvalue += p->ets_packets + p->ts_packets;
283 
284 	/* ber */
285 	c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
286 	c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
287 	c->post_bit_error.stat[0].uvalue += p->ber_error_count;
288 	c->post_bit_count.stat[0].uvalue += p->ber_bit_count;
289 
290 	/* Legacy PER/BER */
291 	tmp = p->ets_packets * 65535ULL;
292 	if (p->ts_packets + p->ets_packets)
293 		do_div(tmp, p->ts_packets + p->ets_packets);
294 	client->legacy_per = tmp;
295 }
296 
297 static void smsdvb_update_dvb_stats(struct smsdvb_client_t *client,
298 				    struct sms_stats *p)
299 {
300 	struct dvb_frontend *fe = &client->frontend;
301 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
302 
303 	if (client->prt_dvb_stats)
304 		client->prt_dvb_stats(client->debug_data, p);
305 
306 	client->fe_status = sms_to_status(p->is_demod_locked, p->is_rf_locked);
307 
308 	/* Update DVB modulation parameters */
309 	c->frequency = p->frequency;
310 	client->fe_status = sms_to_status(p->is_demod_locked, 0);
311 	c->bandwidth_hz = sms_to_bw(p->bandwidth);
312 	c->transmission_mode = sms_to_mode(p->transmission_mode);
313 	c->guard_interval = sms_to_guard_interval(p->guard_interval);
314 	c->code_rate_HP = sms_to_code_rate(p->code_rate);
315 	c->code_rate_LP = sms_to_code_rate(p->lp_code_rate);
316 	c->hierarchy = sms_to_hierarchy(p->hierarchy);
317 	c->modulation = sms_to_modulation(p->constellation);
318 
319 	/* update reception data */
320 	c->lna = p->is_external_lna_on ? 1 : 0;
321 
322 	/* Carrier to noise ratio, in DB */
323 	c->cnr.stat[0].svalue = p->SNR * 1000;
324 
325 	/* signal Strength, in DBm */
326 	c->strength.stat[0].uvalue = p->in_band_pwr * 1000;
327 
328 	/* PER/BER requires demod lock */
329 	if (!p->is_demod_locked)
330 		return;
331 
332 	/* TS PER */
333 	client->last_per = c->block_error.stat[0].uvalue;
334 	c->block_error.stat[0].scale = FE_SCALE_COUNTER;
335 	c->block_count.stat[0].scale = FE_SCALE_COUNTER;
336 	c->block_error.stat[0].uvalue += p->error_ts_packets;
337 	c->block_count.stat[0].uvalue += p->total_ts_packets;
338 
339 	/* ber */
340 	c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
341 	c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
342 	c->post_bit_error.stat[0].uvalue += p->ber_error_count;
343 	c->post_bit_count.stat[0].uvalue += p->ber_bit_count;
344 
345 	/* Legacy PER/BER */
346 	client->legacy_ber = p->ber;
347 };
348 
349 static void smsdvb_update_isdbt_stats(struct smsdvb_client_t *client,
350 				      struct sms_isdbt_stats *p)
351 {
352 	struct dvb_frontend *fe = &client->frontend;
353 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
354 	struct sms_isdbt_layer_stats *lr;
355 	int i, n_layers;
356 
357 	if (client->prt_isdb_stats)
358 		client->prt_isdb_stats(client->debug_data, p);
359 
360 	client->fe_status = sms_to_status(p->is_demod_locked, p->is_rf_locked);
361 
362 	/*
363 	 * Firmware 2.1 seems to report only lock status and
364 	 * signal strength. The signal strength indicator is at the
365 	 * wrong field.
366 	 */
367 	if (p->statistics_type == 0) {
368 		c->strength.stat[0].uvalue = ((s32)p->transmission_mode) * 1000;
369 		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
370 		return;
371 	}
372 
373 	/* Update ISDB-T transmission parameters */
374 	c->frequency = p->frequency;
375 	c->bandwidth_hz = sms_to_bw(p->bandwidth);
376 	c->transmission_mode = sms_to_isdbt_mode(p->transmission_mode);
377 	c->guard_interval = sms_to_isdbt_guard_interval(p->guard_interval);
378 	c->isdbt_partial_reception = p->partial_reception ? 1 : 0;
379 	n_layers = p->num_of_layers;
380 	if (n_layers < 1)
381 		n_layers = 1;
382 	if (n_layers > 3)
383 		n_layers = 3;
384 	c->isdbt_layer_enabled = 0;
385 
386 	/* update reception data */
387 	c->lna = p->is_external_lna_on ? 1 : 0;
388 
389 	/* Carrier to noise ratio, in DB */
390 	c->cnr.stat[0].svalue = p->SNR * 1000;
391 
392 	/* signal Strength, in DBm */
393 	c->strength.stat[0].uvalue = p->in_band_pwr * 1000;
394 
395 	/* PER/BER and per-layer stats require demod lock */
396 	if (!p->is_demod_locked)
397 		return;
398 
399 	client->last_per = c->block_error.stat[0].uvalue;
400 
401 	/* Clears global counters, as the code below will sum it again */
402 	c->block_error.stat[0].uvalue = 0;
403 	c->block_count.stat[0].uvalue = 0;
404 	c->block_error.stat[0].scale = FE_SCALE_COUNTER;
405 	c->block_count.stat[0].scale = FE_SCALE_COUNTER;
406 	c->post_bit_error.stat[0].uvalue = 0;
407 	c->post_bit_count.stat[0].uvalue = 0;
408 	c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
409 	c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
410 
411 	for (i = 0; i < n_layers; i++) {
412 		lr = &p->layer_info[i];
413 
414 		/* Update per-layer transmission parameters */
415 		if (lr->number_of_segments > 0 && lr->number_of_segments < 13) {
416 			c->isdbt_layer_enabled |= 1 << i;
417 			c->layer[i].segment_count = lr->number_of_segments;
418 		} else {
419 			continue;
420 		}
421 		c->layer[i].modulation = sms_to_modulation(lr->constellation);
422 		c->layer[i].fec = sms_to_code_rate(lr->code_rate);
423 
424 		/* Time interleaving */
425 		c->layer[i].interleaving = (u8)lr->ti_ldepth_i;
426 
427 		/* TS PER */
428 		c->block_error.stat[i + 1].scale = FE_SCALE_COUNTER;
429 		c->block_count.stat[i + 1].scale = FE_SCALE_COUNTER;
430 		c->block_error.stat[i + 1].uvalue += lr->error_ts_packets;
431 		c->block_count.stat[i + 1].uvalue += lr->total_ts_packets;
432 
433 		/* Update global PER counter */
434 		c->block_error.stat[0].uvalue += lr->error_ts_packets;
435 		c->block_count.stat[0].uvalue += lr->total_ts_packets;
436 
437 		/* BER */
438 		c->post_bit_error.stat[i + 1].scale = FE_SCALE_COUNTER;
439 		c->post_bit_count.stat[i + 1].scale = FE_SCALE_COUNTER;
440 		c->post_bit_error.stat[i + 1].uvalue += lr->ber_error_count;
441 		c->post_bit_count.stat[i + 1].uvalue += lr->ber_bit_count;
442 
443 		/* Update global BER counter */
444 		c->post_bit_error.stat[0].uvalue += lr->ber_error_count;
445 		c->post_bit_count.stat[0].uvalue += lr->ber_bit_count;
446 	}
447 }
448 
449 static void smsdvb_update_isdbt_stats_ex(struct smsdvb_client_t *client,
450 					 struct sms_isdbt_stats_ex *p)
451 {
452 	struct dvb_frontend *fe = &client->frontend;
453 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
454 	struct sms_isdbt_layer_stats *lr;
455 	int i, n_layers;
456 
457 	if (client->prt_isdb_stats_ex)
458 		client->prt_isdb_stats_ex(client->debug_data, p);
459 
460 	/* Update ISDB-T transmission parameters */
461 	c->frequency = p->frequency;
462 	client->fe_status = sms_to_status(p->is_demod_locked, 0);
463 	c->bandwidth_hz = sms_to_bw(p->bandwidth);
464 	c->transmission_mode = sms_to_isdbt_mode(p->transmission_mode);
465 	c->guard_interval = sms_to_isdbt_guard_interval(p->guard_interval);
466 	c->isdbt_partial_reception = p->partial_reception ? 1 : 0;
467 	n_layers = p->num_of_layers;
468 	if (n_layers < 1)
469 		n_layers = 1;
470 	if (n_layers > 3)
471 		n_layers = 3;
472 	c->isdbt_layer_enabled = 0;
473 
474 	/* update reception data */
475 	c->lna = p->is_external_lna_on ? 1 : 0;
476 
477 	/* Carrier to noise ratio, in DB */
478 	c->cnr.stat[0].svalue = p->SNR * 1000;
479 
480 	/* signal Strength, in DBm */
481 	c->strength.stat[0].uvalue = p->in_band_pwr * 1000;
482 
483 	/* PER/BER and per-layer stats require demod lock */
484 	if (!p->is_demod_locked)
485 		return;
486 
487 	client->last_per = c->block_error.stat[0].uvalue;
488 
489 	/* Clears global counters, as the code below will sum it again */
490 	c->block_error.stat[0].uvalue = 0;
491 	c->block_count.stat[0].uvalue = 0;
492 	c->block_error.stat[0].scale = FE_SCALE_COUNTER;
493 	c->block_count.stat[0].scale = FE_SCALE_COUNTER;
494 	c->post_bit_error.stat[0].uvalue = 0;
495 	c->post_bit_count.stat[0].uvalue = 0;
496 	c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
497 	c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
498 
499 	c->post_bit_error.len = n_layers + 1;
500 	c->post_bit_count.len = n_layers + 1;
501 	c->block_error.len = n_layers + 1;
502 	c->block_count.len = n_layers + 1;
503 	for (i = 0; i < n_layers; i++) {
504 		lr = &p->layer_info[i];
505 
506 		/* Update per-layer transmission parameters */
507 		if (lr->number_of_segments > 0 && lr->number_of_segments < 13) {
508 			c->isdbt_layer_enabled |= 1 << i;
509 			c->layer[i].segment_count = lr->number_of_segments;
510 		} else {
511 			continue;
512 		}
513 		c->layer[i].modulation = sms_to_modulation(lr->constellation);
514 		c->layer[i].fec = sms_to_code_rate(lr->code_rate);
515 
516 		/* Time interleaving */
517 		c->layer[i].interleaving = (u8)lr->ti_ldepth_i;
518 
519 		/* TS PER */
520 		c->block_error.stat[i + 1].scale = FE_SCALE_COUNTER;
521 		c->block_count.stat[i + 1].scale = FE_SCALE_COUNTER;
522 		c->block_error.stat[i + 1].uvalue += lr->error_ts_packets;
523 		c->block_count.stat[i + 1].uvalue += lr->total_ts_packets;
524 
525 		/* Update global PER counter */
526 		c->block_error.stat[0].uvalue += lr->error_ts_packets;
527 		c->block_count.stat[0].uvalue += lr->total_ts_packets;
528 
529 		/* ber */
530 		c->post_bit_error.stat[i + 1].scale = FE_SCALE_COUNTER;
531 		c->post_bit_count.stat[i + 1].scale = FE_SCALE_COUNTER;
532 		c->post_bit_error.stat[i + 1].uvalue += lr->ber_error_count;
533 		c->post_bit_count.stat[i + 1].uvalue += lr->ber_bit_count;
534 
535 		/* Update global ber counter */
536 		c->post_bit_error.stat[0].uvalue += lr->ber_error_count;
537 		c->post_bit_count.stat[0].uvalue += lr->ber_bit_count;
538 	}
539 }
540 
541 static int smsdvb_onresponse(void *context, struct smscore_buffer_t *cb)
542 {
543 	struct smsdvb_client_t *client = (struct smsdvb_client_t *) context;
544 	struct sms_msg_hdr *phdr = (struct sms_msg_hdr *) (((u8 *) cb->p)
545 			+ cb->offset);
546 	void *p = phdr + 1;
547 	struct dvb_frontend *fe = &client->frontend;
548 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
549 	bool is_status_update = false;
550 
551 	switch (phdr->msg_type) {
552 	case MSG_SMS_DVBT_BDA_DATA:
553 		/*
554 		 * Only feed data to dvb demux if are there any feed listening
555 		 * to it and if the device has tuned
556 		 */
557 		if (client->feed_users && client->has_tuned)
558 			dvb_dmx_swfilter(&client->demux, p,
559 					 cb->size - sizeof(struct sms_msg_hdr));
560 		break;
561 
562 	case MSG_SMS_RF_TUNE_RES:
563 	case MSG_SMS_ISDBT_TUNE_RES:
564 		complete(&client->tune_done);
565 		break;
566 
567 	case MSG_SMS_SIGNAL_DETECTED_IND:
568 		client->fe_status = FE_HAS_SIGNAL  | FE_HAS_CARRIER |
569 				    FE_HAS_VITERBI | FE_HAS_SYNC    |
570 				    FE_HAS_LOCK;
571 
572 		is_status_update = true;
573 		break;
574 
575 	case MSG_SMS_NO_SIGNAL_IND:
576 		client->fe_status = 0;
577 
578 		is_status_update = true;
579 		break;
580 
581 	case MSG_SMS_TRANSMISSION_IND:
582 		smsdvb_update_tx_params(client, p);
583 
584 		is_status_update = true;
585 		break;
586 
587 	case MSG_SMS_HO_PER_SLICES_IND:
588 		smsdvb_update_per_slices(client, p);
589 
590 		is_status_update = true;
591 		break;
592 
593 	case MSG_SMS_GET_STATISTICS_RES:
594 		switch (smscore_get_device_mode(client->coredev)) {
595 		case DEVICE_MODE_ISDBT:
596 		case DEVICE_MODE_ISDBT_BDA:
597 			smsdvb_update_isdbt_stats(client, p);
598 			break;
599 		default:
600 			/* Skip sms_msg_statistics_info:request_result field */
601 			smsdvb_update_dvb_stats(client, p + sizeof(u32));
602 		}
603 
604 		is_status_update = true;
605 		break;
606 
607 	/* Only for ISDB-T */
608 	case MSG_SMS_GET_STATISTICS_EX_RES:
609 		/* Skip sms_msg_statistics_info:request_result field? */
610 		smsdvb_update_isdbt_stats_ex(client, p + sizeof(u32));
611 		is_status_update = true;
612 		break;
613 	default:
614 		pr_debug("message not handled\n");
615 	}
616 	smscore_putbuffer(client->coredev, cb);
617 
618 	if (is_status_update) {
619 		if (client->fe_status & FE_HAS_LOCK) {
620 			sms_board_dvb3_event(client, DVB3_EVENT_FE_LOCK);
621 			if (client->last_per == c->block_error.stat[0].uvalue)
622 				sms_board_dvb3_event(client, DVB3_EVENT_UNC_OK);
623 			else
624 				sms_board_dvb3_event(client, DVB3_EVENT_UNC_ERR);
625 			client->has_tuned = true;
626 		} else {
627 			smsdvb_stats_not_ready(fe);
628 			client->has_tuned = false;
629 			sms_board_dvb3_event(client, DVB3_EVENT_FE_UNLOCK);
630 		}
631 		complete(&client->stats_done);
632 	}
633 
634 	return 0;
635 }
636 
637 static void smsdvb_media_device_unregister(struct smsdvb_client_t *client)
638 {
639 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
640 	struct smscore_device_t *coredev = client->coredev;
641 
642 	if (!coredev->media_dev)
643 		return;
644 	media_device_unregister(coredev->media_dev);
645 	media_device_cleanup(coredev->media_dev);
646 	kfree(coredev->media_dev);
647 	coredev->media_dev = NULL;
648 #endif
649 }
650 
651 static void smsdvb_unregister_client(struct smsdvb_client_t *client)
652 {
653 	/* must be called under clientslock */
654 
655 	list_del(&client->entry);
656 
657 	smsdvb_debugfs_release(client);
658 	smscore_unregister_client(client->smsclient);
659 	dvb_unregister_frontend(&client->frontend);
660 	dvb_dmxdev_release(&client->dmxdev);
661 	dvb_dmx_release(&client->demux);
662 	smsdvb_media_device_unregister(client);
663 	dvb_unregister_adapter(&client->adapter);
664 	kfree(client);
665 }
666 
667 static void smsdvb_onremove(void *context)
668 {
669 	mutex_lock(&g_smsdvb_clientslock);
670 
671 	smsdvb_unregister_client((struct smsdvb_client_t *) context);
672 
673 	mutex_unlock(&g_smsdvb_clientslock);
674 }
675 
676 static int smsdvb_start_feed(struct dvb_demux_feed *feed)
677 {
678 	struct smsdvb_client_t *client =
679 		container_of(feed->demux, struct smsdvb_client_t, demux);
680 	struct sms_msg_data pid_msg;
681 
682 	pr_debug("add pid %d(%x)\n",
683 		  feed->pid, feed->pid);
684 
685 	client->feed_users++;
686 
687 	pid_msg.x_msg_header.msg_src_id = DVBT_BDA_CONTROL_MSG_ID;
688 	pid_msg.x_msg_header.msg_dst_id = HIF_TASK;
689 	pid_msg.x_msg_header.msg_flags = 0;
690 	pid_msg.x_msg_header.msg_type  = MSG_SMS_ADD_PID_FILTER_REQ;
691 	pid_msg.x_msg_header.msg_length = sizeof(pid_msg);
692 	pid_msg.msg_data[0] = feed->pid;
693 
694 	return smsclient_sendrequest(client->smsclient,
695 				     &pid_msg, sizeof(pid_msg));
696 }
697 
698 static int smsdvb_stop_feed(struct dvb_demux_feed *feed)
699 {
700 	struct smsdvb_client_t *client =
701 		container_of(feed->demux, struct smsdvb_client_t, demux);
702 	struct sms_msg_data pid_msg;
703 
704 	pr_debug("remove pid %d(%x)\n",
705 		  feed->pid, feed->pid);
706 
707 	client->feed_users--;
708 
709 	pid_msg.x_msg_header.msg_src_id = DVBT_BDA_CONTROL_MSG_ID;
710 	pid_msg.x_msg_header.msg_dst_id = HIF_TASK;
711 	pid_msg.x_msg_header.msg_flags = 0;
712 	pid_msg.x_msg_header.msg_type  = MSG_SMS_REMOVE_PID_FILTER_REQ;
713 	pid_msg.x_msg_header.msg_length = sizeof(pid_msg);
714 	pid_msg.msg_data[0] = feed->pid;
715 
716 	return smsclient_sendrequest(client->smsclient,
717 				     &pid_msg, sizeof(pid_msg));
718 }
719 
720 static int smsdvb_sendrequest_and_wait(struct smsdvb_client_t *client,
721 					void *buffer, size_t size,
722 					struct completion *completion)
723 {
724 	int rc;
725 
726 	rc = smsclient_sendrequest(client->smsclient, buffer, size);
727 	if (rc < 0)
728 		return rc;
729 
730 	return wait_for_completion_timeout(completion,
731 					   msecs_to_jiffies(2000)) ?
732 						0 : -ETIME;
733 }
734 
735 static int smsdvb_send_statistics_request(struct smsdvb_client_t *client)
736 {
737 	int rc;
738 	struct sms_msg_hdr msg;
739 
740 	/* Don't request stats too fast */
741 	if (client->get_stats_jiffies &&
742 	   (!time_after(jiffies, client->get_stats_jiffies)))
743 		return 0;
744 	client->get_stats_jiffies = jiffies + msecs_to_jiffies(100);
745 
746 	msg.msg_src_id = DVBT_BDA_CONTROL_MSG_ID;
747 	msg.msg_dst_id = HIF_TASK;
748 	msg.msg_flags = 0;
749 	msg.msg_length = sizeof(msg);
750 
751 	switch (smscore_get_device_mode(client->coredev)) {
752 	case DEVICE_MODE_ISDBT:
753 	case DEVICE_MODE_ISDBT_BDA:
754 		/*
755 		* Check for firmware version, to avoid breaking for old cards
756 		*/
757 		if (client->coredev->fw_version >= 0x800)
758 			msg.msg_type = MSG_SMS_GET_STATISTICS_EX_REQ;
759 		else
760 			msg.msg_type = MSG_SMS_GET_STATISTICS_REQ;
761 		break;
762 	default:
763 		msg.msg_type = MSG_SMS_GET_STATISTICS_REQ;
764 	}
765 
766 	rc = smsdvb_sendrequest_and_wait(client, &msg, sizeof(msg),
767 					 &client->stats_done);
768 
769 	return rc;
770 }
771 
772 static inline int led_feedback(struct smsdvb_client_t *client)
773 {
774 	if (!(client->fe_status & FE_HAS_LOCK))
775 		return sms_board_led_feedback(client->coredev, SMS_LED_OFF);
776 
777 	return sms_board_led_feedback(client->coredev,
778 				     (client->legacy_ber == 0) ?
779 				     SMS_LED_HI : SMS_LED_LO);
780 }
781 
782 static int smsdvb_read_status(struct dvb_frontend *fe, enum fe_status *stat)
783 {
784 	int rc;
785 	struct smsdvb_client_t *client;
786 	client = container_of(fe, struct smsdvb_client_t, frontend);
787 
788 	rc = smsdvb_send_statistics_request(client);
789 
790 	*stat = client->fe_status;
791 
792 	led_feedback(client);
793 
794 	return rc;
795 }
796 
797 static int smsdvb_read_ber(struct dvb_frontend *fe, u32 *ber)
798 {
799 	int rc;
800 	struct smsdvb_client_t *client;
801 
802 	client = container_of(fe, struct smsdvb_client_t, frontend);
803 
804 	rc = smsdvb_send_statistics_request(client);
805 
806 	*ber = client->legacy_ber;
807 
808 	led_feedback(client);
809 
810 	return rc;
811 }
812 
813 static int smsdvb_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
814 {
815 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
816 	int rc;
817 	s32 power = (s32) c->strength.stat[0].uvalue;
818 	struct smsdvb_client_t *client;
819 
820 	client = container_of(fe, struct smsdvb_client_t, frontend);
821 
822 	rc = smsdvb_send_statistics_request(client);
823 
824 	if (power < -95)
825 		*strength = 0;
826 		else if (power > -29)
827 			*strength = 65535;
828 		else
829 			*strength = (power + 95) * 65535 / 66;
830 
831 	led_feedback(client);
832 
833 	return rc;
834 }
835 
836 static int smsdvb_read_snr(struct dvb_frontend *fe, u16 *snr)
837 {
838 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
839 	int rc;
840 	struct smsdvb_client_t *client;
841 
842 	client = container_of(fe, struct smsdvb_client_t, frontend);
843 
844 	rc = smsdvb_send_statistics_request(client);
845 
846 	/* Preferred scale for SNR with legacy API: 0.1 dB */
847 	*snr = ((u32)c->cnr.stat[0].svalue) / 100;
848 
849 	led_feedback(client);
850 
851 	return rc;
852 }
853 
854 static int smsdvb_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
855 {
856 	int rc;
857 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
858 	struct smsdvb_client_t *client;
859 
860 	client = container_of(fe, struct smsdvb_client_t, frontend);
861 
862 	rc = smsdvb_send_statistics_request(client);
863 
864 	*ucblocks = c->block_error.stat[0].uvalue;
865 
866 	led_feedback(client);
867 
868 	return rc;
869 }
870 
871 static int smsdvb_get_tune_settings(struct dvb_frontend *fe,
872 				    struct dvb_frontend_tune_settings *tune)
873 {
874 	pr_debug("\n");
875 
876 	tune->min_delay_ms = 400;
877 	tune->step_size = 250000;
878 	tune->max_drift = 0;
879 	return 0;
880 }
881 
882 static int smsdvb_dvbt_set_frontend(struct dvb_frontend *fe)
883 {
884 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
885 	struct smsdvb_client_t *client =
886 		container_of(fe, struct smsdvb_client_t, frontend);
887 
888 	struct {
889 		struct sms_msg_hdr	msg;
890 		u32		Data[3];
891 	} msg;
892 
893 	int ret;
894 
895 	client->fe_status = 0;
896 	client->event_fe_state = -1;
897 	client->event_unc_state = -1;
898 	fe->dtv_property_cache.delivery_system = SYS_DVBT;
899 
900 	msg.msg.msg_src_id = DVBT_BDA_CONTROL_MSG_ID;
901 	msg.msg.msg_dst_id = HIF_TASK;
902 	msg.msg.msg_flags = 0;
903 	msg.msg.msg_type = MSG_SMS_RF_TUNE_REQ;
904 	msg.msg.msg_length = sizeof(msg);
905 	msg.Data[0] = c->frequency;
906 	msg.Data[2] = 12000000;
907 
908 	pr_debug("%s: freq %d band %d\n", __func__, c->frequency,
909 		 c->bandwidth_hz);
910 
911 	switch (c->bandwidth_hz / 1000000) {
912 	case 8:
913 		msg.Data[1] = BW_8_MHZ;
914 		break;
915 	case 7:
916 		msg.Data[1] = BW_7_MHZ;
917 		break;
918 	case 6:
919 		msg.Data[1] = BW_6_MHZ;
920 		break;
921 	case 0:
922 		return -EOPNOTSUPP;
923 	default:
924 		return -EINVAL;
925 	}
926 	/* Disable LNA, if any. An error is returned if no LNA is present */
927 	ret = sms_board_lna_control(client->coredev, 0);
928 	if (ret == 0) {
929 		enum fe_status status;
930 
931 		/* tune with LNA off at first */
932 		ret = smsdvb_sendrequest_and_wait(client, &msg, sizeof(msg),
933 						  &client->tune_done);
934 
935 		smsdvb_read_status(fe, &status);
936 
937 		if (status & FE_HAS_LOCK)
938 			return ret;
939 
940 		/* previous tune didn't lock - enable LNA and tune again */
941 		sms_board_lna_control(client->coredev, 1);
942 	}
943 
944 	return smsdvb_sendrequest_and_wait(client, &msg, sizeof(msg),
945 					   &client->tune_done);
946 }
947 
948 static int smsdvb_isdbt_set_frontend(struct dvb_frontend *fe)
949 {
950 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
951 	struct smsdvb_client_t *client =
952 		container_of(fe, struct smsdvb_client_t, frontend);
953 	int board_id = smscore_get_board_id(client->coredev);
954 	struct sms_board *board = sms_get_board(board_id);
955 	enum sms_device_type_st type = board->type;
956 	int ret;
957 
958 	struct {
959 		struct sms_msg_hdr	msg;
960 		u32		Data[4];
961 	} msg;
962 
963 	fe->dtv_property_cache.delivery_system = SYS_ISDBT;
964 
965 	msg.msg.msg_src_id  = DVBT_BDA_CONTROL_MSG_ID;
966 	msg.msg.msg_dst_id  = HIF_TASK;
967 	msg.msg.msg_flags  = 0;
968 	msg.msg.msg_type   = MSG_SMS_ISDBT_TUNE_REQ;
969 	msg.msg.msg_length = sizeof(msg);
970 
971 	if (c->isdbt_sb_segment_idx == -1)
972 		c->isdbt_sb_segment_idx = 0;
973 
974 	if (!c->isdbt_layer_enabled)
975 		c->isdbt_layer_enabled = 7;
976 
977 	msg.Data[0] = c->frequency;
978 	msg.Data[1] = BW_ISDBT_1SEG;
979 	msg.Data[2] = 12000000;
980 	msg.Data[3] = c->isdbt_sb_segment_idx;
981 
982 	if (c->isdbt_partial_reception) {
983 		if ((type == SMS_PELE || type == SMS_RIO) &&
984 		    c->isdbt_sb_segment_count > 3)
985 			msg.Data[1] = BW_ISDBT_13SEG;
986 		else if (c->isdbt_sb_segment_count > 1)
987 			msg.Data[1] = BW_ISDBT_3SEG;
988 	} else if (type == SMS_PELE || type == SMS_RIO)
989 		msg.Data[1] = BW_ISDBT_13SEG;
990 
991 	c->bandwidth_hz = 6000000;
992 
993 	pr_debug("freq %d segwidth %d segindex %d\n",
994 		 c->frequency, c->isdbt_sb_segment_count,
995 		 c->isdbt_sb_segment_idx);
996 
997 	/* Disable LNA, if any. An error is returned if no LNA is present */
998 	ret = sms_board_lna_control(client->coredev, 0);
999 	if (ret == 0) {
1000 		enum fe_status status;
1001 
1002 		/* tune with LNA off at first */
1003 		ret = smsdvb_sendrequest_and_wait(client, &msg, sizeof(msg),
1004 						  &client->tune_done);
1005 
1006 		smsdvb_read_status(fe, &status);
1007 
1008 		if (status & FE_HAS_LOCK)
1009 			return ret;
1010 
1011 		/* previous tune didn't lock - enable LNA and tune again */
1012 		sms_board_lna_control(client->coredev, 1);
1013 	}
1014 	return smsdvb_sendrequest_and_wait(client, &msg, sizeof(msg),
1015 					   &client->tune_done);
1016 }
1017 
1018 static int smsdvb_set_frontend(struct dvb_frontend *fe)
1019 {
1020 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
1021 	struct smsdvb_client_t *client =
1022 		container_of(fe, struct smsdvb_client_t, frontend);
1023 	struct smscore_device_t *coredev = client->coredev;
1024 
1025 	smsdvb_stats_not_ready(fe);
1026 	c->strength.stat[0].uvalue = 0;
1027 	c->cnr.stat[0].uvalue = 0;
1028 
1029 	client->has_tuned = false;
1030 
1031 	switch (smscore_get_device_mode(coredev)) {
1032 	case DEVICE_MODE_DVBT:
1033 	case DEVICE_MODE_DVBT_BDA:
1034 		return smsdvb_dvbt_set_frontend(fe);
1035 	case DEVICE_MODE_ISDBT:
1036 	case DEVICE_MODE_ISDBT_BDA:
1037 		return smsdvb_isdbt_set_frontend(fe);
1038 	default:
1039 		return -EINVAL;
1040 	}
1041 }
1042 
1043 static int smsdvb_init(struct dvb_frontend *fe)
1044 {
1045 	struct smsdvb_client_t *client =
1046 		container_of(fe, struct smsdvb_client_t, frontend);
1047 
1048 	sms_board_power(client->coredev, 1);
1049 
1050 	sms_board_dvb3_event(client, DVB3_EVENT_INIT);
1051 	return 0;
1052 }
1053 
1054 static int smsdvb_sleep(struct dvb_frontend *fe)
1055 {
1056 	struct smsdvb_client_t *client =
1057 		container_of(fe, struct smsdvb_client_t, frontend);
1058 
1059 	sms_board_led_feedback(client->coredev, SMS_LED_OFF);
1060 	sms_board_power(client->coredev, 0);
1061 
1062 	sms_board_dvb3_event(client, DVB3_EVENT_SLEEP);
1063 
1064 	return 0;
1065 }
1066 
1067 static void smsdvb_release(struct dvb_frontend *fe)
1068 {
1069 	/* do nothing */
1070 }
1071 
1072 static const struct dvb_frontend_ops smsdvb_fe_ops = {
1073 	.info = {
1074 		.name			= "Siano Mobile Digital MDTV Receiver",
1075 		.frequency_min_hz	=  44250 * kHz,
1076 		.frequency_max_hz	= 867250 * kHz,
1077 		.frequency_stepsize_hz	=    250 * kHz,
1078 		.caps = FE_CAN_INVERSION_AUTO |
1079 			FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1080 			FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
1081 			FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
1082 			FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
1083 			FE_CAN_GUARD_INTERVAL_AUTO |
1084 			FE_CAN_RECOVER |
1085 			FE_CAN_HIERARCHY_AUTO,
1086 	},
1087 
1088 	.release = smsdvb_release,
1089 
1090 	.set_frontend = smsdvb_set_frontend,
1091 	.get_tune_settings = smsdvb_get_tune_settings,
1092 
1093 	.read_status = smsdvb_read_status,
1094 	.read_ber = smsdvb_read_ber,
1095 	.read_signal_strength = smsdvb_read_signal_strength,
1096 	.read_snr = smsdvb_read_snr,
1097 	.read_ucblocks = smsdvb_read_ucblocks,
1098 
1099 	.init = smsdvb_init,
1100 	.sleep = smsdvb_sleep,
1101 };
1102 
1103 static int smsdvb_hotplug(struct smscore_device_t *coredev,
1104 			  struct device *device, int arrival)
1105 {
1106 	struct smsclient_params_t params;
1107 	struct smsdvb_client_t *client;
1108 	int rc;
1109 
1110 	/* device removal handled by onremove callback */
1111 	if (!arrival)
1112 		return 0;
1113 	client = kzalloc(sizeof(struct smsdvb_client_t), GFP_KERNEL);
1114 	if (!client)
1115 		return -ENOMEM;
1116 
1117 	/* register dvb adapter */
1118 	rc = dvb_register_adapter(&client->adapter,
1119 				  sms_get_board(
1120 					smscore_get_board_id(coredev))->name,
1121 				  THIS_MODULE, device, adapter_nr);
1122 	if (rc < 0) {
1123 		pr_err("dvb_register_adapter() failed %d\n", rc);
1124 		goto adapter_error;
1125 	}
1126 	dvb_register_media_controller(&client->adapter, coredev->media_dev);
1127 
1128 	/* init dvb demux */
1129 	client->demux.dmx.capabilities = DMX_TS_FILTERING;
1130 	client->demux.filternum = 32; /* todo: nova ??? */
1131 	client->demux.feednum = 32;
1132 	client->demux.start_feed = smsdvb_start_feed;
1133 	client->demux.stop_feed = smsdvb_stop_feed;
1134 
1135 	rc = dvb_dmx_init(&client->demux);
1136 	if (rc < 0) {
1137 		pr_err("dvb_dmx_init failed %d\n", rc);
1138 		goto dvbdmx_error;
1139 	}
1140 
1141 	/* init dmxdev */
1142 	client->dmxdev.filternum = 32;
1143 	client->dmxdev.demux = &client->demux.dmx;
1144 	client->dmxdev.capabilities = 0;
1145 
1146 	rc = dvb_dmxdev_init(&client->dmxdev, &client->adapter);
1147 	if (rc < 0) {
1148 		pr_err("dvb_dmxdev_init failed %d\n", rc);
1149 		goto dmxdev_error;
1150 	}
1151 
1152 	/* init and register frontend */
1153 	memcpy(&client->frontend.ops, &smsdvb_fe_ops,
1154 	       sizeof(struct dvb_frontend_ops));
1155 
1156 	switch (smscore_get_device_mode(coredev)) {
1157 	case DEVICE_MODE_DVBT:
1158 	case DEVICE_MODE_DVBT_BDA:
1159 		client->frontend.ops.delsys[0] = SYS_DVBT;
1160 		break;
1161 	case DEVICE_MODE_ISDBT:
1162 	case DEVICE_MODE_ISDBT_BDA:
1163 		client->frontend.ops.delsys[0] = SYS_ISDBT;
1164 		break;
1165 	}
1166 
1167 	rc = dvb_register_frontend(&client->adapter, &client->frontend);
1168 	if (rc < 0) {
1169 		pr_err("frontend registration failed %d\n", rc);
1170 		goto frontend_error;
1171 	}
1172 
1173 	params.initial_id = 1;
1174 	params.data_type = MSG_SMS_DVBT_BDA_DATA;
1175 	params.onresponse_handler = smsdvb_onresponse;
1176 	params.onremove_handler = smsdvb_onremove;
1177 	params.context = client;
1178 
1179 	rc = smscore_register_client(coredev, &params, &client->smsclient);
1180 	if (rc < 0) {
1181 		pr_err("smscore_register_client() failed %d\n", rc);
1182 		goto client_error;
1183 	}
1184 
1185 	client->coredev = coredev;
1186 
1187 	init_completion(&client->tune_done);
1188 	init_completion(&client->stats_done);
1189 
1190 	mutex_lock(&g_smsdvb_clientslock);
1191 
1192 	list_add(&client->entry, &g_smsdvb_clients);
1193 
1194 	mutex_unlock(&g_smsdvb_clientslock);
1195 
1196 	client->event_fe_state = -1;
1197 	client->event_unc_state = -1;
1198 	sms_board_dvb3_event(client, DVB3_EVENT_HOTPLUG);
1199 
1200 	sms_board_setup(coredev);
1201 
1202 	if (smsdvb_debugfs_create(client) < 0)
1203 		pr_info("failed to create debugfs node\n");
1204 
1205 	rc = dvb_create_media_graph(&client->adapter, true);
1206 	if (rc < 0) {
1207 		pr_err("dvb_create_media_graph failed %d\n", rc);
1208 		goto media_graph_error;
1209 	}
1210 
1211 	pr_info("DVB interface registered.\n");
1212 	return 0;
1213 
1214 media_graph_error:
1215 	mutex_lock(&g_smsdvb_clientslock);
1216 	list_del(&client->entry);
1217 	mutex_unlock(&g_smsdvb_clientslock);
1218 
1219 	smsdvb_debugfs_release(client);
1220 
1221 client_error:
1222 	dvb_unregister_frontend(&client->frontend);
1223 
1224 frontend_error:
1225 	dvb_dmxdev_release(&client->dmxdev);
1226 
1227 dmxdev_error:
1228 	dvb_dmx_release(&client->demux);
1229 
1230 dvbdmx_error:
1231 	smsdvb_media_device_unregister(client);
1232 	dvb_unregister_adapter(&client->adapter);
1233 
1234 adapter_error:
1235 	kfree(client);
1236 	return rc;
1237 }
1238 
1239 static int __init smsdvb_module_init(void)
1240 {
1241 	int rc;
1242 
1243 	smsdvb_debugfs_register();
1244 
1245 	rc = smscore_register_hotplug(smsdvb_hotplug);
1246 
1247 	pr_debug("\n");
1248 
1249 	return rc;
1250 }
1251 
1252 static void __exit smsdvb_module_exit(void)
1253 {
1254 	smscore_unregister_hotplug(smsdvb_hotplug);
1255 
1256 	mutex_lock(&g_smsdvb_clientslock);
1257 
1258 	while (!list_empty(&g_smsdvb_clients))
1259 		smsdvb_unregister_client((struct smsdvb_client_t *)g_smsdvb_clients.next);
1260 
1261 	smsdvb_debugfs_unregister();
1262 
1263 	mutex_unlock(&g_smsdvb_clientslock);
1264 }
1265 
1266 module_init(smsdvb_module_init);
1267 module_exit(smsdvb_module_exit);
1268 
1269 MODULE_DESCRIPTION("SMS DVB subsystem adaptation module");
1270 MODULE_AUTHOR("Siano Mobile Silicon, Inc. (uris@siano-ms.com)");
1271 MODULE_LICENSE("GPL");
1272