linux/drivers/media/common/siano/smsdvb-main.c
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   1/****************************************************************
   2
   3Siano Mobile Silicon, Inc.
   4MDTV receiver kernel modules.
   5Copyright (C) 2006-2008, Uri Shkolnik
   6
   7This program is free software: you can redistribute it and/or modify
   8it under the terms of the GNU General Public License as published by
   9the 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,
  13but WITHOUT ANY WARRANTY; without even the implied warranty of
  14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15GNU General Public License for more details.
  16
  17You should have received a copy of the GNU General Public License
  18along 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
  38DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  39
  40static struct list_head g_smsdvb_clients;
  41static struct mutex g_smsdvb_clientslock;
  42
  43static 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
  50static 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
  59static u32 sms_to_hierarchy_table[] = {
  60        [0] = HIERARCHY_NONE,
  61        [1] = HIERARCHY_1,
  62        [2] = HIERARCHY_2,
  63        [3] = HIERARCHY_4,
  64};
  65
  66static 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 */
  75static 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
 127static 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
 168static 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
 181static 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
 193static 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
 223static 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
 240static 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
 280static 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
 332static 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
 428static 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
 516static 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
 612static 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
 626static 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
 642static 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
 651static 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
 673static 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
 695static 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
 710static 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
 747static 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
 757static 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
 772static 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
 788static 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
 811static 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
 829static 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
 846static 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
 857static 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
 923static 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
 993static 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
1018static 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
1029static 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
1042static void smsdvb_release(struct dvb_frontend *fe)
1043{
1044        /* do nothing */
1045}
1046
1047static 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
1078static 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
1189client_error:
1190        dvb_unregister_frontend(&client->frontend);
1191
1192frontend_error:
1193        dvb_dmxdev_release(&client->dmxdev);
1194
1195dmxdev_error:
1196        dvb_dmx_release(&client->demux);
1197
1198dvbdmx_error:
1199        smsdvb_media_device_unregister(client);
1200        dvb_unregister_adapter(&client->adapter);
1201
1202adapter_error:
1203        kfree(client);
1204        return rc;
1205}
1206
1207static 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
1223static 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
1237module_init(smsdvb_module_init);
1238module_exit(smsdvb_module_exit);
1239
1240MODULE_DESCRIPTION("SMS DVB subsystem adaptation module");
1241MODULE_AUTHOR("Siano Mobile Silicon, Inc. (uris@siano-ms.com)");
1242MODULE_LICENSE("GPL");
1243