1 /****************************************************************
2 
3 Siano Mobile Silicon, Inc.
4 MDTV receiver kernel modules.
5 Copyright (C) 2006-2008, Uri Shkolnik
6 
7 This program is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 2 of the License, or
10 (at your option) any later version.
11 
12  This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 GNU General Public License for more details.
16 
17 You should have received a copy of the GNU General Public License
18 along with this program.  If not, see <http://www.gnu.org/licenses/>.
19 
20 ****************************************************************/
21 
22 #include "smscoreapi.h"
23 
24 #include <linux/module.h>
25 #include <linux/slab.h>
26 #include <linux/init.h>
27 #include <asm/div64.h>
28 
29 #include <media/dmxdev.h>
30 #include <media/dvbdev.h>
31 #include <media/dvb_demux.h>
32 #include <media/dvb_frontend.h>
33 
34 #include "sms-cards.h"
35 
36 #include "smsdvb.h"
37 
38 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
39 
40 static struct list_head g_smsdvb_clients;
41 static struct mutex g_smsdvb_clientslock;
42 
43 static u32 sms_to_guard_interval_table[] = {
44 	[0] = GUARD_INTERVAL_1_32,
45 	[1] = GUARD_INTERVAL_1_16,
46 	[2] = GUARD_INTERVAL_1_8,
47 	[3] = GUARD_INTERVAL_1_4,
48 };
49 
50 static u32 sms_to_code_rate_table[] = {
51 	[0] = FEC_1_2,
52 	[1] = FEC_2_3,
53 	[2] = FEC_3_4,
54 	[3] = FEC_5_6,
55 	[4] = FEC_7_8,
56 };
57 
58 
59 static u32 sms_to_hierarchy_table[] = {
60 	[0] = HIERARCHY_NONE,
61 	[1] = HIERARCHY_1,
62 	[2] = HIERARCHY_2,
63 	[3] = HIERARCHY_4,
64 };
65 
66 static u32 sms_to_modulation_table[] = {
67 	[0] = QPSK,
68 	[1] = QAM_16,
69 	[2] = QAM_64,
70 	[3] = DQPSK,
71 };
72 
73 
74 /* Events that may come from DVB v3 adapter */
75 static void sms_board_dvb3_event(struct smsdvb_client_t *client,
76 		enum SMS_DVB3_EVENTS event) {
77 
78 	struct smscore_device_t *coredev = client->coredev;
79 	switch (event) {
80 	case DVB3_EVENT_INIT:
81 		pr_debug("DVB3_EVENT_INIT\n");
82 		sms_board_event(coredev, BOARD_EVENT_BIND);
83 		break;
84 	case DVB3_EVENT_SLEEP:
85 		pr_debug("DVB3_EVENT_SLEEP\n");
86 		sms_board_event(coredev, BOARD_EVENT_POWER_SUSPEND);
87 		break;
88 	case DVB3_EVENT_HOTPLUG:
89 		pr_debug("DVB3_EVENT_HOTPLUG\n");
90 		sms_board_event(coredev, BOARD_EVENT_POWER_INIT);
91 		break;
92 	case DVB3_EVENT_FE_LOCK:
93 		if (client->event_fe_state != DVB3_EVENT_FE_LOCK) {
94 			client->event_fe_state = DVB3_EVENT_FE_LOCK;
95 			pr_debug("DVB3_EVENT_FE_LOCK\n");
96 			sms_board_event(coredev, BOARD_EVENT_FE_LOCK);
97 		}
98 		break;
99 	case DVB3_EVENT_FE_UNLOCK:
100 		if (client->event_fe_state != DVB3_EVENT_FE_UNLOCK) {
101 			client->event_fe_state = DVB3_EVENT_FE_UNLOCK;
102 			pr_debug("DVB3_EVENT_FE_UNLOCK\n");
103 			sms_board_event(coredev, BOARD_EVENT_FE_UNLOCK);
104 		}
105 		break;
106 	case DVB3_EVENT_UNC_OK:
107 		if (client->event_unc_state != DVB3_EVENT_UNC_OK) {
108 			client->event_unc_state = DVB3_EVENT_UNC_OK;
109 			pr_debug("DVB3_EVENT_UNC_OK\n");
110 			sms_board_event(coredev, BOARD_EVENT_MULTIPLEX_OK);
111 		}
112 		break;
113 	case DVB3_EVENT_UNC_ERR:
114 		if (client->event_unc_state != DVB3_EVENT_UNC_ERR) {
115 			client->event_unc_state = DVB3_EVENT_UNC_ERR;
116 			pr_debug("DVB3_EVENT_UNC_ERR\n");
117 			sms_board_event(coredev, BOARD_EVENT_MULTIPLEX_ERRORS);
118 		}
119 		break;
120 
121 	default:
122 		pr_err("Unknown dvb3 api event\n");
123 		break;
124 	}
125 }
126 
127 static void smsdvb_stats_not_ready(struct dvb_frontend *fe)
128 {
129 	struct smsdvb_client_t *client =
130 		container_of(fe, struct smsdvb_client_t, frontend);
131 	struct smscore_device_t *coredev = client->coredev;
132 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
133 	int i, n_layers;
134 
135 	switch (smscore_get_device_mode(coredev)) {
136 	case DEVICE_MODE_ISDBT:
137 	case DEVICE_MODE_ISDBT_BDA:
138 		n_layers = 4;
139 		break;
140 	default:
141 		n_layers = 1;
142 	}
143 
144 	/* Global stats */
145 	c->strength.len = 1;
146 	c->cnr.len = 1;
147 	c->strength.stat[0].scale = FE_SCALE_DECIBEL;
148 	c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
149 
150 	/* Per-layer stats */
151 	c->post_bit_error.len = n_layers;
152 	c->post_bit_count.len = n_layers;
153 	c->block_error.len = n_layers;
154 	c->block_count.len = n_layers;
155 
156 	/*
157 	 * Put all of them at FE_SCALE_NOT_AVAILABLE. They're dynamically
158 	 * changed when the stats become available.
159 	 */
160 	for (i = 0; i < n_layers; i++) {
161 		c->post_bit_error.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
162 		c->post_bit_count.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
163 		c->block_error.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
164 		c->block_count.stat[i].scale = FE_SCALE_NOT_AVAILABLE;
165 	}
166 }
167 
168 static inline int sms_to_mode(u32 mode)
169 {
170 	switch (mode) {
171 	case 2:
172 		return TRANSMISSION_MODE_2K;
173 	case 4:
174 		return TRANSMISSION_MODE_4K;
175 	case 8:
176 		return TRANSMISSION_MODE_8K;
177 	}
178 	return TRANSMISSION_MODE_AUTO;
179 }
180 
181 static inline int sms_to_status(u32 is_demod_locked, u32 is_rf_locked)
182 {
183 	if (is_demod_locked)
184 		return FE_HAS_SIGNAL  | FE_HAS_CARRIER | FE_HAS_VITERBI |
185 		       FE_HAS_SYNC    | FE_HAS_LOCK;
186 
187 	if (is_rf_locked)
188 		return FE_HAS_SIGNAL | FE_HAS_CARRIER;
189 
190 	return 0;
191 }
192 
193 static inline u32 sms_to_bw(u32 value)
194 {
195 	return value * 1000000;
196 }
197 
198 #define convert_from_table(value, table, defval) ({			\
199 	u32 __ret;							\
200 	if (value < ARRAY_SIZE(table))					\
201 		__ret = table[value];					\
202 	else								\
203 		__ret = defval;						\
204 	__ret;								\
205 })
206 
207 #define sms_to_guard_interval(value)					\
208 	convert_from_table(value, sms_to_guard_interval_table,		\
209 			   GUARD_INTERVAL_AUTO);
210 
211 #define sms_to_code_rate(value)						\
212 	convert_from_table(value, sms_to_code_rate_table,		\
213 			   FEC_NONE);
214 
215 #define sms_to_hierarchy(value)						\
216 	convert_from_table(value, sms_to_hierarchy_table,		\
217 			   FEC_NONE);
218 
219 #define sms_to_modulation(value)					\
220 	convert_from_table(value, sms_to_modulation_table,		\
221 			   FEC_NONE);
222 
223 static void smsdvb_update_tx_params(struct smsdvb_client_t *client,
224 				    struct sms_tx_stats *p)
225 {
226 	struct dvb_frontend *fe = &client->frontend;
227 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
228 
229 	c->frequency = p->frequency;
230 	client->fe_status = sms_to_status(p->is_demod_locked, 0);
231 	c->bandwidth_hz = sms_to_bw(p->bandwidth);
232 	c->transmission_mode = sms_to_mode(p->transmission_mode);
233 	c->guard_interval = sms_to_guard_interval(p->guard_interval);
234 	c->code_rate_HP = sms_to_code_rate(p->code_rate);
235 	c->code_rate_LP = sms_to_code_rate(p->lp_code_rate);
236 	c->hierarchy = sms_to_hierarchy(p->hierarchy);
237 	c->modulation = sms_to_modulation(p->constellation);
238 }
239 
240 static void smsdvb_update_per_slices(struct smsdvb_client_t *client,
241 				     struct RECEPTION_STATISTICS_PER_SLICES_S *p)
242 {
243 	struct dvb_frontend *fe = &client->frontend;
244 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
245 	u64 tmp;
246 
247 	client->fe_status = sms_to_status(p->is_demod_locked, p->is_rf_locked);
248 	c->modulation = sms_to_modulation(p->constellation);
249 
250 	/* signal Strength, in DBm */
251 	c->strength.stat[0].uvalue = p->in_band_power * 1000;
252 
253 	/* Carrier to noise ratio, in DB */
254 	c->cnr.stat[0].svalue = p->snr * 1000;
255 
256 	/* PER/BER requires demod lock */
257 	if (!p->is_demod_locked)
258 		return;
259 
260 	/* TS PER */
261 	client->last_per = c->block_error.stat[0].uvalue;
262 	c->block_error.stat[0].scale = FE_SCALE_COUNTER;
263 	c->block_count.stat[0].scale = FE_SCALE_COUNTER;
264 	c->block_error.stat[0].uvalue += p->ets_packets;
265 	c->block_count.stat[0].uvalue += p->ets_packets + p->ts_packets;
266 
267 	/* ber */
268 	c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
269 	c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
270 	c->post_bit_error.stat[0].uvalue += p->ber_error_count;
271 	c->post_bit_count.stat[0].uvalue += p->ber_bit_count;
272 
273 	/* Legacy PER/BER */
274 	tmp = p->ets_packets * 65535ULL;
275 	if (p->ts_packets + p->ets_packets)
276 		do_div(tmp, p->ts_packets + p->ets_packets);
277 	client->legacy_per = tmp;
278 }
279 
280 static void smsdvb_update_dvb_stats(struct smsdvb_client_t *client,
281 				    struct sms_stats *p)
282 {
283 	struct dvb_frontend *fe = &client->frontend;
284 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
285 
286 	if (client->prt_dvb_stats)
287 		client->prt_dvb_stats(client->debug_data, p);
288 
289 	client->fe_status = sms_to_status(p->is_demod_locked, p->is_rf_locked);
290 
291 	/* Update DVB modulation parameters */
292 	c->frequency = p->frequency;
293 	client->fe_status = sms_to_status(p->is_demod_locked, 0);
294 	c->bandwidth_hz = sms_to_bw(p->bandwidth);
295 	c->transmission_mode = sms_to_mode(p->transmission_mode);
296 	c->guard_interval = sms_to_guard_interval(p->guard_interval);
297 	c->code_rate_HP = sms_to_code_rate(p->code_rate);
298 	c->code_rate_LP = sms_to_code_rate(p->lp_code_rate);
299 	c->hierarchy = sms_to_hierarchy(p->hierarchy);
300 	c->modulation = sms_to_modulation(p->constellation);
301 
302 	/* update reception data */
303 	c->lna = p->is_external_lna_on ? 1 : 0;
304 
305 	/* Carrier to noise ratio, in DB */
306 	c->cnr.stat[0].svalue = p->SNR * 1000;
307 
308 	/* signal Strength, in DBm */
309 	c->strength.stat[0].uvalue = p->in_band_pwr * 1000;
310 
311 	/* PER/BER requires demod lock */
312 	if (!p->is_demod_locked)
313 		return;
314 
315 	/* TS PER */
316 	client->last_per = c->block_error.stat[0].uvalue;
317 	c->block_error.stat[0].scale = FE_SCALE_COUNTER;
318 	c->block_count.stat[0].scale = FE_SCALE_COUNTER;
319 	c->block_error.stat[0].uvalue += p->error_ts_packets;
320 	c->block_count.stat[0].uvalue += p->total_ts_packets;
321 
322 	/* ber */
323 	c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
324 	c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
325 	c->post_bit_error.stat[0].uvalue += p->ber_error_count;
326 	c->post_bit_count.stat[0].uvalue += p->ber_bit_count;
327 
328 	/* Legacy PER/BER */
329 	client->legacy_ber = p->ber;
330 };
331 
332 static void smsdvb_update_isdbt_stats(struct smsdvb_client_t *client,
333 				      struct sms_isdbt_stats *p)
334 {
335 	struct dvb_frontend *fe = &client->frontend;
336 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
337 	struct sms_isdbt_layer_stats *lr;
338 	int i, n_layers;
339 
340 	if (client->prt_isdb_stats)
341 		client->prt_isdb_stats(client->debug_data, p);
342 
343 	client->fe_status = sms_to_status(p->is_demod_locked, p->is_rf_locked);
344 
345 	/*
346 	 * Firmware 2.1 seems to report only lock status and
347 	 * signal strength. The signal strength indicator is at the
348 	 * wrong field.
349 	 */
350 	if (p->statistics_type == 0) {
351 		c->strength.stat[0].uvalue = ((s32)p->transmission_mode) * 1000;
352 		c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
353 		return;
354 	}
355 
356 	/* Update ISDB-T transmission parameters */
357 	c->frequency = p->frequency;
358 	c->bandwidth_hz = sms_to_bw(p->bandwidth);
359 	c->transmission_mode = sms_to_mode(p->transmission_mode);
360 	c->guard_interval = sms_to_guard_interval(p->guard_interval);
361 	c->isdbt_partial_reception = p->partial_reception ? 1 : 0;
362 	n_layers = p->num_of_layers;
363 	if (n_layers < 1)
364 		n_layers = 1;
365 	if (n_layers > 3)
366 		n_layers = 3;
367 	c->isdbt_layer_enabled = 0;
368 
369 	/* update reception data */
370 	c->lna = p->is_external_lna_on ? 1 : 0;
371 
372 	/* Carrier to noise ratio, in DB */
373 	c->cnr.stat[0].svalue = p->SNR * 1000;
374 
375 	/* signal Strength, in DBm */
376 	c->strength.stat[0].uvalue = p->in_band_pwr * 1000;
377 
378 	/* PER/BER and per-layer stats require demod lock */
379 	if (!p->is_demod_locked)
380 		return;
381 
382 	client->last_per = c->block_error.stat[0].uvalue;
383 
384 	/* Clears global counters, as the code below will sum it again */
385 	c->block_error.stat[0].uvalue = 0;
386 	c->block_count.stat[0].uvalue = 0;
387 	c->block_error.stat[0].scale = FE_SCALE_COUNTER;
388 	c->block_count.stat[0].scale = FE_SCALE_COUNTER;
389 	c->post_bit_error.stat[0].uvalue = 0;
390 	c->post_bit_count.stat[0].uvalue = 0;
391 	c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
392 	c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
393 
394 	for (i = 0; i < n_layers; i++) {
395 		lr = &p->layer_info[i];
396 
397 		/* Update per-layer transmission parameters */
398 		if (lr->number_of_segments > 0 && lr->number_of_segments < 13) {
399 			c->isdbt_layer_enabled |= 1 << i;
400 			c->layer[i].segment_count = lr->number_of_segments;
401 		} else {
402 			continue;
403 		}
404 		c->layer[i].modulation = sms_to_modulation(lr->constellation);
405 
406 		/* TS PER */
407 		c->block_error.stat[i + 1].scale = FE_SCALE_COUNTER;
408 		c->block_count.stat[i + 1].scale = FE_SCALE_COUNTER;
409 		c->block_error.stat[i + 1].uvalue += lr->error_ts_packets;
410 		c->block_count.stat[i + 1].uvalue += lr->total_ts_packets;
411 
412 		/* Update global PER counter */
413 		c->block_error.stat[0].uvalue += lr->error_ts_packets;
414 		c->block_count.stat[0].uvalue += lr->total_ts_packets;
415 
416 		/* BER */
417 		c->post_bit_error.stat[i + 1].scale = FE_SCALE_COUNTER;
418 		c->post_bit_count.stat[i + 1].scale = FE_SCALE_COUNTER;
419 		c->post_bit_error.stat[i + 1].uvalue += lr->ber_error_count;
420 		c->post_bit_count.stat[i + 1].uvalue += lr->ber_bit_count;
421 
422 		/* Update global BER counter */
423 		c->post_bit_error.stat[0].uvalue += lr->ber_error_count;
424 		c->post_bit_count.stat[0].uvalue += lr->ber_bit_count;
425 	}
426 }
427 
428 static void smsdvb_update_isdbt_stats_ex(struct smsdvb_client_t *client,
429 					 struct sms_isdbt_stats_ex *p)
430 {
431 	struct dvb_frontend *fe = &client->frontend;
432 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
433 	struct sms_isdbt_layer_stats *lr;
434 	int i, n_layers;
435 
436 	if (client->prt_isdb_stats_ex)
437 		client->prt_isdb_stats_ex(client->debug_data, p);
438 
439 	/* Update ISDB-T transmission parameters */
440 	c->frequency = p->frequency;
441 	client->fe_status = sms_to_status(p->is_demod_locked, 0);
442 	c->bandwidth_hz = sms_to_bw(p->bandwidth);
443 	c->transmission_mode = sms_to_mode(p->transmission_mode);
444 	c->guard_interval = sms_to_guard_interval(p->guard_interval);
445 	c->isdbt_partial_reception = p->partial_reception ? 1 : 0;
446 	n_layers = p->num_of_layers;
447 	if (n_layers < 1)
448 		n_layers = 1;
449 	if (n_layers > 3)
450 		n_layers = 3;
451 	c->isdbt_layer_enabled = 0;
452 
453 	/* update reception data */
454 	c->lna = p->is_external_lna_on ? 1 : 0;
455 
456 	/* Carrier to noise ratio, in DB */
457 	c->cnr.stat[0].svalue = p->SNR * 1000;
458 
459 	/* signal Strength, in DBm */
460 	c->strength.stat[0].uvalue = p->in_band_pwr * 1000;
461 
462 	/* PER/BER and per-layer stats require demod lock */
463 	if (!p->is_demod_locked)
464 		return;
465 
466 	client->last_per = c->block_error.stat[0].uvalue;
467 
468 	/* Clears global counters, as the code below will sum it again */
469 	c->block_error.stat[0].uvalue = 0;
470 	c->block_count.stat[0].uvalue = 0;
471 	c->block_error.stat[0].scale = FE_SCALE_COUNTER;
472 	c->block_count.stat[0].scale = FE_SCALE_COUNTER;
473 	c->post_bit_error.stat[0].uvalue = 0;
474 	c->post_bit_count.stat[0].uvalue = 0;
475 	c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
476 	c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
477 
478 	c->post_bit_error.len = n_layers + 1;
479 	c->post_bit_count.len = n_layers + 1;
480 	c->block_error.len = n_layers + 1;
481 	c->block_count.len = n_layers + 1;
482 	for (i = 0; i < n_layers; i++) {
483 		lr = &p->layer_info[i];
484 
485 		/* Update per-layer transmission parameters */
486 		if (lr->number_of_segments > 0 && lr->number_of_segments < 13) {
487 			c->isdbt_layer_enabled |= 1 << i;
488 			c->layer[i].segment_count = lr->number_of_segments;
489 		} else {
490 			continue;
491 		}
492 		c->layer[i].modulation = sms_to_modulation(lr->constellation);
493 
494 		/* TS PER */
495 		c->block_error.stat[i + 1].scale = FE_SCALE_COUNTER;
496 		c->block_count.stat[i + 1].scale = FE_SCALE_COUNTER;
497 		c->block_error.stat[i + 1].uvalue += lr->error_ts_packets;
498 		c->block_count.stat[i + 1].uvalue += lr->total_ts_packets;
499 
500 		/* Update global PER counter */
501 		c->block_error.stat[0].uvalue += lr->error_ts_packets;
502 		c->block_count.stat[0].uvalue += lr->total_ts_packets;
503 
504 		/* ber */
505 		c->post_bit_error.stat[i + 1].scale = FE_SCALE_COUNTER;
506 		c->post_bit_count.stat[i + 1].scale = FE_SCALE_COUNTER;
507 		c->post_bit_error.stat[i + 1].uvalue += lr->ber_error_count;
508 		c->post_bit_count.stat[i + 1].uvalue += lr->ber_bit_count;
509 
510 		/* Update global ber counter */
511 		c->post_bit_error.stat[0].uvalue += lr->ber_error_count;
512 		c->post_bit_count.stat[0].uvalue += lr->ber_bit_count;
513 	}
514 }
515 
516 static int smsdvb_onresponse(void *context, struct smscore_buffer_t *cb)
517 {
518 	struct smsdvb_client_t *client = (struct smsdvb_client_t *) context;
519 	struct sms_msg_hdr *phdr = (struct sms_msg_hdr *) (((u8 *) cb->p)
520 			+ cb->offset);
521 	void *p = phdr + 1;
522 	struct dvb_frontend *fe = &client->frontend;
523 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
524 	bool is_status_update = false;
525 
526 	switch (phdr->msg_type) {
527 	case MSG_SMS_DVBT_BDA_DATA:
528 		/*
529 		 * Only feed data to dvb demux if are there any feed listening
530 		 * to it and if the device has tuned
531 		 */
532 		if (client->feed_users && client->has_tuned)
533 			dvb_dmx_swfilter(&client->demux, p,
534 					 cb->size - sizeof(struct sms_msg_hdr));
535 		break;
536 
537 	case MSG_SMS_RF_TUNE_RES:
538 	case MSG_SMS_ISDBT_TUNE_RES:
539 		complete(&client->tune_done);
540 		break;
541 
542 	case MSG_SMS_SIGNAL_DETECTED_IND:
543 		client->fe_status = FE_HAS_SIGNAL  | FE_HAS_CARRIER |
544 				    FE_HAS_VITERBI | FE_HAS_SYNC    |
545 				    FE_HAS_LOCK;
546 
547 		is_status_update = true;
548 		break;
549 
550 	case MSG_SMS_NO_SIGNAL_IND:
551 		client->fe_status = 0;
552 
553 		is_status_update = true;
554 		break;
555 
556 	case MSG_SMS_TRANSMISSION_IND:
557 		smsdvb_update_tx_params(client, p);
558 
559 		is_status_update = true;
560 		break;
561 
562 	case MSG_SMS_HO_PER_SLICES_IND:
563 		smsdvb_update_per_slices(client, p);
564 
565 		is_status_update = true;
566 		break;
567 
568 	case MSG_SMS_GET_STATISTICS_RES:
569 		switch (smscore_get_device_mode(client->coredev)) {
570 		case DEVICE_MODE_ISDBT:
571 		case DEVICE_MODE_ISDBT_BDA:
572 			smsdvb_update_isdbt_stats(client, p);
573 			break;
574 		default:
575 			/* Skip sms_msg_statistics_info:request_result field */
576 			smsdvb_update_dvb_stats(client, p + sizeof(u32));
577 		}
578 
579 		is_status_update = true;
580 		break;
581 
582 	/* Only for ISDB-T */
583 	case MSG_SMS_GET_STATISTICS_EX_RES:
584 		/* Skip sms_msg_statistics_info:request_result field? */
585 		smsdvb_update_isdbt_stats_ex(client, p + sizeof(u32));
586 		is_status_update = true;
587 		break;
588 	default:
589 		pr_debug("message not handled\n");
590 	}
591 	smscore_putbuffer(client->coredev, cb);
592 
593 	if (is_status_update) {
594 		if (client->fe_status & FE_HAS_LOCK) {
595 			sms_board_dvb3_event(client, DVB3_EVENT_FE_LOCK);
596 			if (client->last_per == c->block_error.stat[0].uvalue)
597 				sms_board_dvb3_event(client, DVB3_EVENT_UNC_OK);
598 			else
599 				sms_board_dvb3_event(client, DVB3_EVENT_UNC_ERR);
600 			client->has_tuned = true;
601 		} else {
602 			smsdvb_stats_not_ready(fe);
603 			client->has_tuned = false;
604 			sms_board_dvb3_event(client, DVB3_EVENT_FE_UNLOCK);
605 		}
606 		complete(&client->stats_done);
607 	}
608 
609 	return 0;
610 }
611 
612 static void smsdvb_media_device_unregister(struct smsdvb_client_t *client)
613 {
614 #ifdef CONFIG_MEDIA_CONTROLLER_DVB
615 	struct smscore_device_t *coredev = client->coredev;
616 
617 	if (!coredev->media_dev)
618 		return;
619 	media_device_unregister(coredev->media_dev);
620 	media_device_cleanup(coredev->media_dev);
621 	kfree(coredev->media_dev);
622 	coredev->media_dev = NULL;
623 #endif
624 }
625 
626 static void smsdvb_unregister_client(struct smsdvb_client_t *client)
627 {
628 	/* must be called under clientslock */
629 
630 	list_del(&client->entry);
631 
632 	smsdvb_debugfs_release(client);
633 	smscore_unregister_client(client->smsclient);
634 	dvb_unregister_frontend(&client->frontend);
635 	dvb_dmxdev_release(&client->dmxdev);
636 	dvb_dmx_release(&client->demux);
637 	smsdvb_media_device_unregister(client);
638 	dvb_unregister_adapter(&client->adapter);
639 	kfree(client);
640 }
641 
642 static void smsdvb_onremove(void *context)
643 {
644 	kmutex_lock(&g_smsdvb_clientslock);
645 
646 	smsdvb_unregister_client((struct smsdvb_client_t *) context);
647 
648 	kmutex_unlock(&g_smsdvb_clientslock);
649 }
650 
651 static int smsdvb_start_feed(struct dvb_demux_feed *feed)
652 {
653 	struct smsdvb_client_t *client =
654 		container_of(feed->demux, struct smsdvb_client_t, demux);
655 	struct sms_msg_data pid_msg;
656 
657 	pr_debug("add pid %d(%x)\n",
658 		  feed->pid, feed->pid);
659 
660 	client->feed_users++;
661 
662 	pid_msg.x_msg_header.msg_src_id = DVBT_BDA_CONTROL_MSG_ID;
663 	pid_msg.x_msg_header.msg_dst_id = HIF_TASK;
664 	pid_msg.x_msg_header.msg_flags = 0;
665 	pid_msg.x_msg_header.msg_type  = MSG_SMS_ADD_PID_FILTER_REQ;
666 	pid_msg.x_msg_header.msg_length = sizeof(pid_msg);
667 	pid_msg.msg_data[0] = feed->pid;
668 
669 	return smsclient_sendrequest(client->smsclient,
670 				     &pid_msg, sizeof(pid_msg));
671 }
672 
673 static int smsdvb_stop_feed(struct dvb_demux_feed *feed)
674 {
675 	struct smsdvb_client_t *client =
676 		container_of(feed->demux, struct smsdvb_client_t, demux);
677 	struct sms_msg_data pid_msg;
678 
679 	pr_debug("remove pid %d(%x)\n",
680 		  feed->pid, feed->pid);
681 
682 	client->feed_users--;
683 
684 	pid_msg.x_msg_header.msg_src_id = DVBT_BDA_CONTROL_MSG_ID;
685 	pid_msg.x_msg_header.msg_dst_id = HIF_TASK;
686 	pid_msg.x_msg_header.msg_flags = 0;
687 	pid_msg.x_msg_header.msg_type  = MSG_SMS_REMOVE_PID_FILTER_REQ;
688 	pid_msg.x_msg_header.msg_length = sizeof(pid_msg);
689 	pid_msg.msg_data[0] = feed->pid;
690 
691 	return smsclient_sendrequest(client->smsclient,
692 				     &pid_msg, sizeof(pid_msg));
693 }
694 
695 static int smsdvb_sendrequest_and_wait(struct smsdvb_client_t *client,
696 					void *buffer, size_t size,
697 					struct completion *completion)
698 {
699 	int rc;
700 
701 	rc = smsclient_sendrequest(client->smsclient, buffer, size);
702 	if (rc < 0)
703 		return rc;
704 
705 	return wait_for_completion_timeout(completion,
706 					   msecs_to_jiffies(2000)) ?
707 						0 : -ETIME;
708 }
709 
710 static int smsdvb_send_statistics_request(struct smsdvb_client_t *client)
711 {
712 	int rc;
713 	struct sms_msg_hdr msg;
714 
715 	/* Don't request stats too fast */
716 	if (client->get_stats_jiffies &&
717 	   (!time_after(jiffies, client->get_stats_jiffies)))
718 		return 0;
719 	client->get_stats_jiffies = jiffies + msecs_to_jiffies(100);
720 
721 	msg.msg_src_id = DVBT_BDA_CONTROL_MSG_ID;
722 	msg.msg_dst_id = HIF_TASK;
723 	msg.msg_flags = 0;
724 	msg.msg_length = sizeof(msg);
725 
726 	switch (smscore_get_device_mode(client->coredev)) {
727 	case DEVICE_MODE_ISDBT:
728 	case DEVICE_MODE_ISDBT_BDA:
729 		/*
730 		* Check for firmware version, to avoid breaking for old cards
731 		*/
732 		if (client->coredev->fw_version >= 0x800)
733 			msg.msg_type = MSG_SMS_GET_STATISTICS_EX_REQ;
734 		else
735 			msg.msg_type = MSG_SMS_GET_STATISTICS_REQ;
736 		break;
737 	default:
738 		msg.msg_type = MSG_SMS_GET_STATISTICS_REQ;
739 	}
740 
741 	rc = smsdvb_sendrequest_and_wait(client, &msg, sizeof(msg),
742 					 &client->stats_done);
743 
744 	return rc;
745 }
746 
747 static inline int led_feedback(struct smsdvb_client_t *client)
748 {
749 	if (!(client->fe_status & FE_HAS_LOCK))
750 		return sms_board_led_feedback(client->coredev, SMS_LED_OFF);
751 
752 	return sms_board_led_feedback(client->coredev,
753 				     (client->legacy_ber == 0) ?
754 				     SMS_LED_HI : SMS_LED_LO);
755 }
756 
757 static int smsdvb_read_status(struct dvb_frontend *fe, enum fe_status *stat)
758 {
759 	int rc;
760 	struct smsdvb_client_t *client;
761 	client = container_of(fe, struct smsdvb_client_t, frontend);
762 
763 	rc = smsdvb_send_statistics_request(client);
764 
765 	*stat = client->fe_status;
766 
767 	led_feedback(client);
768 
769 	return rc;
770 }
771 
772 static int smsdvb_read_ber(struct dvb_frontend *fe, u32 *ber)
773 {
774 	int rc;
775 	struct smsdvb_client_t *client;
776 
777 	client = container_of(fe, struct smsdvb_client_t, frontend);
778 
779 	rc = smsdvb_send_statistics_request(client);
780 
781 	*ber = client->legacy_ber;
782 
783 	led_feedback(client);
784 
785 	return rc;
786 }
787 
788 static int smsdvb_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
789 {
790 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
791 	int rc;
792 	s32 power = (s32) c->strength.stat[0].uvalue;
793 	struct smsdvb_client_t *client;
794 
795 	client = container_of(fe, struct smsdvb_client_t, frontend);
796 
797 	rc = smsdvb_send_statistics_request(client);
798 
799 	if (power < -95)
800 		*strength = 0;
801 		else if (power > -29)
802 			*strength = 65535;
803 		else
804 			*strength = (power + 95) * 65535 / 66;
805 
806 	led_feedback(client);
807 
808 	return rc;
809 }
810 
811 static int smsdvb_read_snr(struct dvb_frontend *fe, u16 *snr)
812 {
813 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
814 	int rc;
815 	struct smsdvb_client_t *client;
816 
817 	client = container_of(fe, struct smsdvb_client_t, frontend);
818 
819 	rc = smsdvb_send_statistics_request(client);
820 
821 	/* Preferred scale for SNR with legacy API: 0.1 dB */
822 	*snr = ((u32)c->cnr.stat[0].svalue) / 100;
823 
824 	led_feedback(client);
825 
826 	return rc;
827 }
828 
829 static int smsdvb_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
830 {
831 	int rc;
832 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
833 	struct smsdvb_client_t *client;
834 
835 	client = container_of(fe, struct smsdvb_client_t, frontend);
836 
837 	rc = smsdvb_send_statistics_request(client);
838 
839 	*ucblocks = c->block_error.stat[0].uvalue;
840 
841 	led_feedback(client);
842 
843 	return rc;
844 }
845 
846 static int smsdvb_get_tune_settings(struct dvb_frontend *fe,
847 				    struct dvb_frontend_tune_settings *tune)
848 {
849 	pr_debug("\n");
850 
851 	tune->min_delay_ms = 400;
852 	tune->step_size = 250000;
853 	tune->max_drift = 0;
854 	return 0;
855 }
856 
857 static int smsdvb_dvbt_set_frontend(struct dvb_frontend *fe)
858 {
859 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
860 	struct smsdvb_client_t *client =
861 		container_of(fe, struct smsdvb_client_t, frontend);
862 
863 	struct {
864 		struct sms_msg_hdr	msg;
865 		u32		Data[3];
866 	} msg;
867 
868 	int ret;
869 
870 	client->fe_status = 0;
871 	client->event_fe_state = -1;
872 	client->event_unc_state = -1;
873 	fe->dtv_property_cache.delivery_system = SYS_DVBT;
874 
875 	msg.msg.msg_src_id = DVBT_BDA_CONTROL_MSG_ID;
876 	msg.msg.msg_dst_id = HIF_TASK;
877 	msg.msg.msg_flags = 0;
878 	msg.msg.msg_type = MSG_SMS_RF_TUNE_REQ;
879 	msg.msg.msg_length = sizeof(msg);
880 	msg.Data[0] = c->frequency;
881 	msg.Data[2] = 12000000;
882 
883 	pr_debug("%s: freq %d band %d\n", __func__, c->frequency,
884 		 c->bandwidth_hz);
885 
886 	switch (c->bandwidth_hz / 1000000) {
887 	case 8:
888 		msg.Data[1] = BW_8_MHZ;
889 		break;
890 	case 7:
891 		msg.Data[1] = BW_7_MHZ;
892 		break;
893 	case 6:
894 		msg.Data[1] = BW_6_MHZ;
895 		break;
896 	case 0:
897 		return -EOPNOTSUPP;
898 	default:
899 		return -EINVAL;
900 	}
901 	/* Disable LNA, if any. An error is returned if no LNA is present */
902 	ret = sms_board_lna_control(client->coredev, 0);
903 	if (ret == 0) {
904 		enum fe_status status;
905 
906 		/* tune with LNA off at first */
907 		ret = smsdvb_sendrequest_and_wait(client, &msg, sizeof(msg),
908 						  &client->tune_done);
909 
910 		smsdvb_read_status(fe, &status);
911 
912 		if (status & FE_HAS_LOCK)
913 			return ret;
914 
915 		/* previous tune didn't lock - enable LNA and tune again */
916 		sms_board_lna_control(client->coredev, 1);
917 	}
918 
919 	return smsdvb_sendrequest_and_wait(client, &msg, sizeof(msg),
920 					   &client->tune_done);
921 }
922 
923 static int smsdvb_isdbt_set_frontend(struct dvb_frontend *fe)
924 {
925 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
926 	struct smsdvb_client_t *client =
927 		container_of(fe, struct smsdvb_client_t, frontend);
928 	int board_id = smscore_get_board_id(client->coredev);
929 	struct sms_board *board = sms_get_board(board_id);
930 	enum sms_device_type_st type = board->type;
931 	int ret;
932 
933 	struct {
934 		struct sms_msg_hdr	msg;
935 		u32		Data[4];
936 	} msg;
937 
938 	fe->dtv_property_cache.delivery_system = SYS_ISDBT;
939 
940 	msg.msg.msg_src_id  = DVBT_BDA_CONTROL_MSG_ID;
941 	msg.msg.msg_dst_id  = HIF_TASK;
942 	msg.msg.msg_flags  = 0;
943 	msg.msg.msg_type   = MSG_SMS_ISDBT_TUNE_REQ;
944 	msg.msg.msg_length = sizeof(msg);
945 
946 	if (c->isdbt_sb_segment_idx == -1)
947 		c->isdbt_sb_segment_idx = 0;
948 
949 	if (!c->isdbt_layer_enabled)
950 		c->isdbt_layer_enabled = 7;
951 
952 	msg.Data[0] = c->frequency;
953 	msg.Data[1] = BW_ISDBT_1SEG;
954 	msg.Data[2] = 12000000;
955 	msg.Data[3] = c->isdbt_sb_segment_idx;
956 
957 	if (c->isdbt_partial_reception) {
958 		if ((type == SMS_PELE || type == SMS_RIO) &&
959 		    c->isdbt_sb_segment_count > 3)
960 			msg.Data[1] = BW_ISDBT_13SEG;
961 		else if (c->isdbt_sb_segment_count > 1)
962 			msg.Data[1] = BW_ISDBT_3SEG;
963 	} else if (type == SMS_PELE || type == SMS_RIO)
964 		msg.Data[1] = BW_ISDBT_13SEG;
965 
966 	c->bandwidth_hz = 6000000;
967 
968 	pr_debug("freq %d segwidth %d segindex %d\n",
969 		 c->frequency, c->isdbt_sb_segment_count,
970 		 c->isdbt_sb_segment_idx);
971 
972 	/* Disable LNA, if any. An error is returned if no LNA is present */
973 	ret = sms_board_lna_control(client->coredev, 0);
974 	if (ret == 0) {
975 		enum fe_status status;
976 
977 		/* tune with LNA off at first */
978 		ret = smsdvb_sendrequest_and_wait(client, &msg, sizeof(msg),
979 						  &client->tune_done);
980 
981 		smsdvb_read_status(fe, &status);
982 
983 		if (status & FE_HAS_LOCK)
984 			return ret;
985 
986 		/* previous tune didn't lock - enable LNA and tune again */
987 		sms_board_lna_control(client->coredev, 1);
988 	}
989 	return smsdvb_sendrequest_and_wait(client, &msg, sizeof(msg),
990 					   &client->tune_done);
991 }
992 
993 static int smsdvb_set_frontend(struct dvb_frontend *fe)
994 {
995 	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
996 	struct smsdvb_client_t *client =
997 		container_of(fe, struct smsdvb_client_t, frontend);
998 	struct smscore_device_t *coredev = client->coredev;
999 
1000 	smsdvb_stats_not_ready(fe);
1001 	c->strength.stat[0].uvalue = 0;
1002 	c->cnr.stat[0].uvalue = 0;
1003 
1004 	client->has_tuned = false;
1005 
1006 	switch (smscore_get_device_mode(coredev)) {
1007 	case DEVICE_MODE_DVBT:
1008 	case DEVICE_MODE_DVBT_BDA:
1009 		return smsdvb_dvbt_set_frontend(fe);
1010 	case DEVICE_MODE_ISDBT:
1011 	case DEVICE_MODE_ISDBT_BDA:
1012 		return smsdvb_isdbt_set_frontend(fe);
1013 	default:
1014 		return -EINVAL;
1015 	}
1016 }
1017 
1018 static int smsdvb_init(struct dvb_frontend *fe)
1019 {
1020 	struct smsdvb_client_t *client =
1021 		container_of(fe, struct smsdvb_client_t, frontend);
1022 
1023 	sms_board_power(client->coredev, 1);
1024 
1025 	sms_board_dvb3_event(client, DVB3_EVENT_INIT);
1026 	return 0;
1027 }
1028 
1029 static int smsdvb_sleep(struct dvb_frontend *fe)
1030 {
1031 	struct smsdvb_client_t *client =
1032 		container_of(fe, struct smsdvb_client_t, frontend);
1033 
1034 	sms_board_led_feedback(client->coredev, SMS_LED_OFF);
1035 	sms_board_power(client->coredev, 0);
1036 
1037 	sms_board_dvb3_event(client, DVB3_EVENT_SLEEP);
1038 
1039 	return 0;
1040 }
1041 
1042 static void smsdvb_release(struct dvb_frontend *fe)
1043 {
1044 	/* do nothing */
1045 }
1046 
1047 static const struct dvb_frontend_ops smsdvb_fe_ops = {
1048 	.info = {
1049 		.name			= "Siano Mobile Digital MDTV Receiver",
1050 		.frequency_min		= 44250000,
1051 		.frequency_max		= 867250000,
1052 		.frequency_stepsize	= 250000,
1053 		.caps = FE_CAN_INVERSION_AUTO |
1054 			FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
1055 			FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
1056 			FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
1057 			FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
1058 			FE_CAN_GUARD_INTERVAL_AUTO |
1059 			FE_CAN_RECOVER |
1060 			FE_CAN_HIERARCHY_AUTO,
1061 	},
1062 
1063 	.release = smsdvb_release,
1064 
1065 	.set_frontend = smsdvb_set_frontend,
1066 	.get_tune_settings = smsdvb_get_tune_settings,
1067 
1068 	.read_status = smsdvb_read_status,
1069 	.read_ber = smsdvb_read_ber,
1070 	.read_signal_strength = smsdvb_read_signal_strength,
1071 	.read_snr = smsdvb_read_snr,
1072 	.read_ucblocks = smsdvb_read_ucblocks,
1073 
1074 	.init = smsdvb_init,
1075 	.sleep = smsdvb_sleep,
1076 };
1077 
1078 static int smsdvb_hotplug(struct smscore_device_t *coredev,
1079 			  struct device *device, int arrival)
1080 {
1081 	struct smsclient_params_t params;
1082 	struct smsdvb_client_t *client;
1083 	int rc;
1084 
1085 	/* device removal handled by onremove callback */
1086 	if (!arrival)
1087 		return 0;
1088 	client = kzalloc(sizeof(struct smsdvb_client_t), GFP_KERNEL);
1089 	if (!client)
1090 		return -ENOMEM;
1091 
1092 	/* register dvb adapter */
1093 	rc = dvb_register_adapter(&client->adapter,
1094 				  sms_get_board(
1095 					smscore_get_board_id(coredev))->name,
1096 				  THIS_MODULE, device, adapter_nr);
1097 	if (rc < 0) {
1098 		pr_err("dvb_register_adapter() failed %d\n", rc);
1099 		goto adapter_error;
1100 	}
1101 	dvb_register_media_controller(&client->adapter, coredev->media_dev);
1102 
1103 	/* init dvb demux */
1104 	client->demux.dmx.capabilities = DMX_TS_FILTERING;
1105 	client->demux.filternum = 32; /* todo: nova ??? */
1106 	client->demux.feednum = 32;
1107 	client->demux.start_feed = smsdvb_start_feed;
1108 	client->demux.stop_feed = smsdvb_stop_feed;
1109 
1110 	rc = dvb_dmx_init(&client->demux);
1111 	if (rc < 0) {
1112 		pr_err("dvb_dmx_init failed %d\n", rc);
1113 		goto dvbdmx_error;
1114 	}
1115 
1116 	/* init dmxdev */
1117 	client->dmxdev.filternum = 32;
1118 	client->dmxdev.demux = &client->demux.dmx;
1119 	client->dmxdev.capabilities = 0;
1120 
1121 	rc = dvb_dmxdev_init(&client->dmxdev, &client->adapter);
1122 	if (rc < 0) {
1123 		pr_err("dvb_dmxdev_init failed %d\n", rc);
1124 		goto dmxdev_error;
1125 	}
1126 
1127 	/* init and register frontend */
1128 	memcpy(&client->frontend.ops, &smsdvb_fe_ops,
1129 	       sizeof(struct dvb_frontend_ops));
1130 
1131 	switch (smscore_get_device_mode(coredev)) {
1132 	case DEVICE_MODE_DVBT:
1133 	case DEVICE_MODE_DVBT_BDA:
1134 		client->frontend.ops.delsys[0] = SYS_DVBT;
1135 		break;
1136 	case DEVICE_MODE_ISDBT:
1137 	case DEVICE_MODE_ISDBT_BDA:
1138 		client->frontend.ops.delsys[0] = SYS_ISDBT;
1139 		break;
1140 	}
1141 
1142 	rc = dvb_register_frontend(&client->adapter, &client->frontend);
1143 	if (rc < 0) {
1144 		pr_err("frontend registration failed %d\n", rc);
1145 		goto frontend_error;
1146 	}
1147 
1148 	params.initial_id = 1;
1149 	params.data_type = MSG_SMS_DVBT_BDA_DATA;
1150 	params.onresponse_handler = smsdvb_onresponse;
1151 	params.onremove_handler = smsdvb_onremove;
1152 	params.context = client;
1153 
1154 	rc = smscore_register_client(coredev, &params, &client->smsclient);
1155 	if (rc < 0) {
1156 		pr_err("smscore_register_client() failed %d\n", rc);
1157 		goto client_error;
1158 	}
1159 
1160 	client->coredev = coredev;
1161 
1162 	init_completion(&client->tune_done);
1163 	init_completion(&client->stats_done);
1164 
1165 	kmutex_lock(&g_smsdvb_clientslock);
1166 
1167 	list_add(&client->entry, &g_smsdvb_clients);
1168 
1169 	kmutex_unlock(&g_smsdvb_clientslock);
1170 
1171 	client->event_fe_state = -1;
1172 	client->event_unc_state = -1;
1173 	sms_board_dvb3_event(client, DVB3_EVENT_HOTPLUG);
1174 
1175 	sms_board_setup(coredev);
1176 
1177 	if (smsdvb_debugfs_create(client) < 0)
1178 		pr_info("failed to create debugfs node\n");
1179 
1180 	rc = dvb_create_media_graph(&client->adapter, true);
1181 	if (rc < 0) {
1182 		pr_err("dvb_create_media_graph failed %d\n", rc);
1183 		goto client_error;
1184 	}
1185 
1186 	pr_info("DVB interface registered.\n");
1187 	return 0;
1188 
1189 client_error:
1190 	dvb_unregister_frontend(&client->frontend);
1191 
1192 frontend_error:
1193 	dvb_dmxdev_release(&client->dmxdev);
1194 
1195 dmxdev_error:
1196 	dvb_dmx_release(&client->demux);
1197 
1198 dvbdmx_error:
1199 	smsdvb_media_device_unregister(client);
1200 	dvb_unregister_adapter(&client->adapter);
1201 
1202 adapter_error:
1203 	kfree(client);
1204 	return rc;
1205 }
1206 
1207 static int __init smsdvb_module_init(void)
1208 {
1209 	int rc;
1210 
1211 	INIT_LIST_HEAD(&g_smsdvb_clients);
1212 	kmutex_init(&g_smsdvb_clientslock);
1213 
1214 	smsdvb_debugfs_register();
1215 
1216 	rc = smscore_register_hotplug(smsdvb_hotplug);
1217 
1218 	pr_debug("\n");
1219 
1220 	return rc;
1221 }
1222 
1223 static void __exit smsdvb_module_exit(void)
1224 {
1225 	smscore_unregister_hotplug(smsdvb_hotplug);
1226 
1227 	kmutex_lock(&g_smsdvb_clientslock);
1228 
1229 	while (!list_empty(&g_smsdvb_clients))
1230 		smsdvb_unregister_client((struct smsdvb_client_t *)g_smsdvb_clients.next);
1231 
1232 	smsdvb_debugfs_unregister();
1233 
1234 	kmutex_unlock(&g_smsdvb_clientslock);
1235 }
1236 
1237 module_init(smsdvb_module_init);
1238 module_exit(smsdvb_module_exit);
1239 
1240 MODULE_DESCRIPTION("SMS DVB subsystem adaptation module");
1241 MODULE_AUTHOR("Siano Mobile Silicon, Inc. (uris@siano-ms.com)");
1242 MODULE_LICENSE("GPL");
1243