drivers/media/dvb/siano/smsdvb.c

   1 /*
   2  *  Driver for the Siano SMS1xxx USB dongle
   3  *
   4  *  author: Anatoly Greenblat
   5  *
   6  *  Copyright (c), 2005-2008 Siano Mobile Silicon, Inc.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation;
  11  *
  12  *  Software distributed under the License is distributed on an "AS IS"
  13  *  basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.
  14  *
  15  *  See the 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, write to the Free Software
  19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/init.h>
  24
  25 #include "smscoreapi.h"
  26 #include "sms-cards.h"
  27
  28 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  29
  30 struct smsdvb_client_t {
  31         struct list_head entry;
  32
  33         struct smscore_device_t *coredev;
  34         struct smscore_client_t *smsclient;
  35
  36         struct dvb_adapter      adapter;
  37         struct dvb_demux        demux;
  38         struct dmxdev           dmxdev;
  39         struct dvb_frontend     frontend;
  40
  41         fe_status_t             fe_status;
  42         int                     fe_ber, fe_snr, fe_unc, fe_signal_strength;
  43
  44         struct completion       tune_done, stat_done;
  45
  46         /* todo: save freq/band instead whole struct */
  47         struct dvb_frontend_parameters fe_params;
  48 };
  49
  50 static struct list_head g_smsdvb_clients;
  51 static struct mutex g_smsdvb_clientslock;
  52
  53 static int smsdvb_onresponse(void *context, struct smscore_buffer_t *cb)
  54 {
  55         struct smsdvb_client_t *client = (struct smsdvb_client_t *) context;
  56         struct SmsMsgHdr_ST *phdr =
  57                 (struct SmsMsgHdr_ST *)(((u8 *) cb->p) + cb->offset);
  58
  59         switch (phdr->msgType) {
  60         case MSG_SMS_DVBT_BDA_DATA:
  61                 dvb_dmx_swfilter(&client->demux, (u8 *)(phdr + 1),
  62                                  cb->size - sizeof(struct SmsMsgHdr_ST));
  63                 break;
  64
  65         case MSG_SMS_RF_TUNE_RES:
  66                 complete(&client->tune_done);
  67                 break;
  68
  69         case MSG_SMS_GET_STATISTICS_RES:
  70         {
  71                 struct SmsMsgStatisticsInfo_ST *p =
  72                         (struct SmsMsgStatisticsInfo_ST *)(phdr + 1);
  73
  74                 if (p->Stat.IsDemodLocked) {
  75                         client->fe_status = FE_HAS_SIGNAL |
  76                                             FE_HAS_CARRIER |
  77                                             FE_HAS_VITERBI |
  78                                             FE_HAS_SYNC |
  79                                             FE_HAS_LOCK;
  80
  81                         client->fe_snr = p->Stat.SNR;
  82                         client->fe_ber = p->Stat.BER;
  83                         client->fe_unc = p->Stat.BERErrorCount;
  84
  85                         if (p->Stat.InBandPwr < -95)
  86                                 client->fe_signal_strength = 0;
  87                         else if (p->Stat.InBandPwr > -29)
  88                                 client->fe_signal_strength = 100;
  89                         else
  90                                 client->fe_signal_strength =
  91                                         (p->Stat.InBandPwr + 95) * 3 / 2;
  92                 } else {
  93                         client->fe_status = 0;
  94                         client->fe_snr =
  95                         client->fe_ber =
  96                         client->fe_unc =
  97                         client->fe_signal_strength = 0;
  98                 }
  99
 100                 complete(&client->stat_done);
 101                 break;
 102         } }
 103
 104         smscore_putbuffer(client->coredev, cb);
 105
 106         return 0;
 107 }
 108
 109 static void smsdvb_unregister_client(struct smsdvb_client_t *client)
 110 {
 111         /* must be called under clientslock */
 112
 113         list_del(&client->entry);
 114
 115         smscore_unregister_client(client->smsclient);
 116         dvb_unregister_frontend(&client->frontend);
 117         dvb_dmxdev_release(&client->dmxdev);
 118         dvb_dmx_release(&client->demux);
 119         dvb_unregister_adapter(&client->adapter);
 120         kfree(client);
 121 }
 122
 123 static void smsdvb_onremove(void *context)
 124 {
 125         kmutex_lock(&g_smsdvb_clientslock);
 126
 127         smsdvb_unregister_client((struct smsdvb_client_t *) context);
 128
 129         kmutex_unlock(&g_smsdvb_clientslock);
 130 }
 131
 132 static int smsdvb_start_feed(struct dvb_demux_feed *feed)
 133 {
 134         struct smsdvb_client_t *client =
 135                 container_of(feed->demux, struct smsdvb_client_t, demux);
 136         struct SmsMsgData_ST PidMsg;
 137
 138         sms_debug("add pid %d(%x)",
 139                   feed->pid, feed->pid);
 140
 141         PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
 142         PidMsg.xMsgHeader.msgDstId = HIF_TASK;
 143         PidMsg.xMsgHeader.msgFlags = 0;
 144         PidMsg.xMsgHeader.msgType  = MSG_SMS_ADD_PID_FILTER_REQ;
 145         PidMsg.xMsgHeader.msgLength = sizeof(PidMsg);
 146         PidMsg.msgData[0] = feed->pid;
 147
 148         return smsclient_sendrequest(client->smsclient,
 149                                      &PidMsg, sizeof(PidMsg));
 150 }
 151
 152 static int smsdvb_stop_feed(struct dvb_demux_feed *feed)
 153 {
 154         struct smsdvb_client_t *client =
 155                 container_of(feed->demux, struct smsdvb_client_t, demux);
 156         struct SmsMsgData_ST PidMsg;
 157
 158         sms_debug("remove pid %d(%x)",
 159                   feed->pid, feed->pid);
 160
 161         PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
 162         PidMsg.xMsgHeader.msgDstId = HIF_TASK;
 163         PidMsg.xMsgHeader.msgFlags = 0;
 164         PidMsg.xMsgHeader.msgType  = MSG_SMS_REMOVE_PID_FILTER_REQ;
 165         PidMsg.xMsgHeader.msgLength = sizeof(PidMsg);
 166         PidMsg.msgData[0] = feed->pid;
 167
 168         return smsclient_sendrequest(client->smsclient,
 169                                      &PidMsg, sizeof(PidMsg));
 170 }
 171
 172 static int smsdvb_sendrequest_and_wait(struct smsdvb_client_t *client,
 173                                         void *buffer, size_t size,
 174                                         struct completion *completion)
 175 {
 176         int rc = smsclient_sendrequest(client->smsclient, buffer, size);
 177         if (rc < 0)
 178                 return rc;
 179
 180         return wait_for_completion_timeout(completion,
 181                                            msecs_to_jiffies(2000)) ?
 182                                                 0 : -ETIME;
 183 }
 184
 185 static int smsdvb_send_statistics_request(struct smsdvb_client_t *client)
 186 {
 187         struct SmsMsgHdr_ST Msg = { MSG_SMS_GET_STATISTICS_REQ,
 188                              DVBT_BDA_CONTROL_MSG_ID,
 189                              HIF_TASK, sizeof(struct SmsMsgHdr_ST), 0 };
 190         int ret = smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 191                                               &client->stat_done);
 192         if (ret < 0)
 193                 return ret;
 194
 195         if (client->fe_status & FE_HAS_LOCK)
 196                 sms_board_led_feedback(client->coredev,
 197                                        (client->fe_unc == 0) ?
 198                                        SMS_LED_HI : SMS_LED_LO);
 199         else
 200                 sms_board_led_feedback(client->coredev, SMS_LED_OFF);
 201         return ret;
 202 }
 203
 204 static int smsdvb_read_status(struct dvb_frontend *fe, fe_status_t *stat)
 205 {
 206         struct smsdvb_client_t *client =
 207                 container_of(fe, struct smsdvb_client_t, frontend);
 208         int rc = smsdvb_send_statistics_request(client);
 209
 210         if (!rc)
 211                 *stat = client->fe_status;
 212
 213         return rc;
 214 }
 215
 216 static int smsdvb_read_ber(struct dvb_frontend *fe, u32 *ber)
 217 {
 218         struct smsdvb_client_t *client =
 219                 container_of(fe, struct smsdvb_client_t, frontend);
 220         int rc = smsdvb_send_statistics_request(client);
 221
 222         if (!rc)
 223                 *ber = client->fe_ber;
 224
 225         return rc;
 226 }
 227
 228 static int smsdvb_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 229 {
 230         struct smsdvb_client_t *client =
 231                 container_of(fe, struct smsdvb_client_t, frontend);
 232         int rc = smsdvb_send_statistics_request(client);
 233
 234         if (!rc)
 235                 *strength = client->fe_signal_strength;
 236
 237         return rc;
 238 }
 239
 240 static int smsdvb_read_snr(struct dvb_frontend *fe, u16 *snr)
 241 {
 242         struct smsdvb_client_t *client =
 243                 container_of(fe, struct smsdvb_client_t, frontend);
 244         int rc = smsdvb_send_statistics_request(client);
 245
 246         if (!rc)
 247                 *snr = client->fe_snr;
 248
 249         return rc;
 250 }
 251
 252 static int smsdvb_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 253 {
 254         struct smsdvb_client_t *client =
 255                 container_of(fe, struct smsdvb_client_t, frontend);
 256         int rc = smsdvb_send_statistics_request(client);
 257
 258         if (!rc)
 259                 *ucblocks = client->fe_unc;
 260
 261         return rc;
 262 }
 263
 264 static int smsdvb_get_tune_settings(struct dvb_frontend *fe,
 265                                     struct dvb_frontend_tune_settings *tune)
 266 {
 267         sms_debug("");
 268
 269         tune->min_delay_ms = 400;
 270         tune->step_size = 250000;
 271         tune->max_drift = 0;
 272         return 0;
 273 }
 274
 275 static int smsdvb_set_frontend(struct dvb_frontend *fe,
 276                                struct dvb_frontend_parameters *fep)
 277 {
 278         struct smsdvb_client_t *client =
 279                 container_of(fe, struct smsdvb_client_t, frontend);
 280
 281         struct {
 282                 struct SmsMsgHdr_ST     Msg;
 283                 u32             Data[3];
 284         } Msg;
 285         int ret;
 286
 287         Msg.Msg.msgSrcId  = DVBT_BDA_CONTROL_MSG_ID;
 288         Msg.Msg.msgDstId  = HIF_TASK;
 289         Msg.Msg.msgFlags  = 0;
 290         Msg.Msg.msgType   = MSG_SMS_RF_TUNE_REQ;
 291         Msg.Msg.msgLength = sizeof(Msg);
 292         Msg.Data[0] = fep->frequency;
 293         Msg.Data[2] = 12000000;
 294
 295         sms_debug("freq %d band %d",
 296                   fep->frequency, fep->u.ofdm.bandwidth);
 297
 298         switch (fep->u.ofdm.bandwidth) {
 299         case BANDWIDTH_8_MHZ: Msg.Data[1] = BW_8_MHZ; break;
 300         case BANDWIDTH_7_MHZ: Msg.Data[1] = BW_7_MHZ; break;
 301         case BANDWIDTH_6_MHZ: Msg.Data[1] = BW_6_MHZ; break;
 302         case BANDWIDTH_AUTO: return -EOPNOTSUPP;
 303         default: return -EINVAL;
 304         }
 305
 306         /* Disable LNA, if any. An error is returned if no LNA is present */
 307         ret = sms_board_lna_control(client->coredev, 0);
 308         if (ret == 0) {
 309                 fe_status_t status;
 310
 311                 /* tune with LNA off at first */
 312                 ret = smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 313                                                   &client->tune_done);
 314
 315                 smsdvb_read_status(fe, &status);
 316
 317                 if (status & FE_HAS_LOCK)
 318                         return ret;
 319
 320                 /* previous tune didnt lock - enable LNA and tune again */
 321                 sms_board_lna_control(client->coredev, 1);
 322         }
 323
 324         return smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 325                                            &client->tune_done);
 326 }
 327
 328 static int smsdvb_get_frontend(struct dvb_frontend *fe,
 329                                struct dvb_frontend_parameters *fep)
 330 {
 331         struct smsdvb_client_t *client =
 332                 container_of(fe, struct smsdvb_client_t, frontend);
 333
 334         sms_debug("");
 335
 336         /* todo: */
 337         memcpy(fep, &client->fe_params,
 338                sizeof(struct dvb_frontend_parameters));
 339
 340         return 0;
 341 }
 342
 343 static int smsdvb_init(struct dvb_frontend *fe)
 344 {
 345         struct smsdvb_client_t *client =
 346                 container_of(fe, struct smsdvb_client_t, frontend);
 347
 348         sms_board_power(client->coredev, 1);
 349
 350         return 0;
 351 }
 352
 353 static int smsdvb_sleep(struct dvb_frontend *fe)
 354 {
 355         struct smsdvb_client_t *client =
 356                 container_of(fe, struct smsdvb_client_t, frontend);
 357
 358         sms_board_led_feedback(client->coredev, SMS_LED_OFF);
 359         sms_board_power(client->coredev, 0);
 360
 361         return 0;
 362 }
 363
 364 static void smsdvb_release(struct dvb_frontend *fe)
 365 {
 366         /* do nothing */
 367 }
 368
 369 static struct dvb_frontend_ops smsdvb_fe_ops = {
 370         .info = {
 371                 .name                   = "Siano Mobile Digital SMS1xxx",
 372                 .type                   = FE_OFDM,
 373                 .frequency_min          = 44250000,
 374                 .frequency_max          = 867250000,
 375                 .frequency_stepsize     = 250000,
 376                 .caps = FE_CAN_INVERSION_AUTO |
 377                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 378                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 379                         FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
 380                         FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
 381                         FE_CAN_GUARD_INTERVAL_AUTO |
 382                         FE_CAN_RECOVER |
 383                         FE_CAN_HIERARCHY_AUTO,
 384         },
 385
 386         .release = smsdvb_release,
 387
 388         .set_frontend = smsdvb_set_frontend,
 389         .get_frontend = smsdvb_get_frontend,
 390         .get_tune_settings = smsdvb_get_tune_settings,
 391
 392         .read_status = smsdvb_read_status,
 393         .read_ber = smsdvb_read_ber,
 394         .read_signal_strength = smsdvb_read_signal_strength,
 395         .read_snr = smsdvb_read_snr,
 396         .read_ucblocks = smsdvb_read_ucblocks,
 397
 398         .init = smsdvb_init,
 399         .sleep = smsdvb_sleep,
 400 };
 401
 402 static int smsdvb_hotplug(struct smscore_device_t *coredev,
 403                           struct device *device, int arrival)
 404 {
 405         struct smsclient_params_t params;
 406         struct smsdvb_client_t *client;
 407         int rc;
 408
 409         /* device removal handled by onremove callback */
 410         if (!arrival)
 411                 return 0;
 412
 413         if (smscore_get_device_mode(coredev) != 4) {
 414                 sms_err("SMS Device mode is not set for "
 415                         "DVB operation.");
 416                 return 0;
 417         }
 418
 419         client = kzalloc(sizeof(struct smsdvb_client_t), GFP_KERNEL);
 420         if (!client) {
 421                 sms_err("kmalloc() failed");
 422                 return -ENOMEM;
 423         }
 424
 425         /* register dvb adapter */
 426         rc = dvb_register_adapter(&client->adapter,
 427                                   sms_get_board(
 428                                         smscore_get_board_id(coredev))->name,
 429                                   THIS_MODULE, device, adapter_nr);
 430         if (rc < 0) {
 431                 sms_err("dvb_register_adapter() failed %d", rc);
 432                 goto adapter_error;
 433         }
 434
 435         /* init dvb demux */
 436         client->demux.dmx.capabilities = DMX_TS_FILTERING;
 437         client->demux.filternum = 32; /* todo: nova ??? */
 438         client->demux.feednum = 32;
 439         client->demux.start_feed = smsdvb_start_feed;
 440         client->demux.stop_feed = smsdvb_stop_feed;
 441
 442         rc = dvb_dmx_init(&client->demux);
 443         if (rc < 0) {
 444                 sms_err("dvb_dmx_init failed %d", rc);
 445                 goto dvbdmx_error;
 446         }
 447
 448         /* init dmxdev */
 449         client->dmxdev.filternum = 32;
 450         client->dmxdev.demux = &client->demux.dmx;
 451         client->dmxdev.capabilities = 0;
 452
 453         rc = dvb_dmxdev_init(&client->dmxdev, &client->adapter);
 454         if (rc < 0) {
 455                 sms_err("dvb_dmxdev_init failed %d", rc);
 456                 goto dmxdev_error;
 457         }
 458
 459         /* init and register frontend */
 460         memcpy(&client->frontend.ops, &smsdvb_fe_ops,
 461                sizeof(struct dvb_frontend_ops));
 462
 463         rc = dvb_register_frontend(&client->adapter, &client->frontend);
 464         if (rc < 0) {
 465                 sms_err("frontend registration failed %d", rc);
 466                 goto frontend_error;
 467         }
 468
 469         params.initial_id = 1;
 470         params.data_type = MSG_SMS_DVBT_BDA_DATA;
 471         params.onresponse_handler = smsdvb_onresponse;
 472         params.onremove_handler = smsdvb_onremove;
 473         params.context = client;
 474
 475         rc = smscore_register_client(coredev, &params, &client->smsclient);
 476         if (rc < 0) {
 477                 sms_err("smscore_register_client() failed %d", rc);
 478                 goto client_error;
 479         }
 480
 481         client->coredev = coredev;
 482
 483         init_completion(&client->tune_done);
 484         init_completion(&client->stat_done);
 485
 486         kmutex_lock(&g_smsdvb_clientslock);
 487
 488         list_add(&client->entry, &g_smsdvb_clients);
 489
 490         kmutex_unlock(&g_smsdvb_clientslock);
 491
 492         sms_info("success");
 493
 494         sms_board_setup(coredev);
 495
 496         return 0;
 497
 498 client_error:
 499         dvb_unregister_frontend(&client->frontend);
 500
 501 frontend_error:
 502         dvb_dmxdev_release(&client->dmxdev);
 503
 504 dmxdev_error:
 505         dvb_dmx_release(&client->demux);
 506
 507 dvbdmx_error:
 508         dvb_unregister_adapter(&client->adapter);
 509
 510 adapter_error:
 511         kfree(client);
 512         return rc;
 513 }
 514
 515 int smsdvb_register(void)
 516 {
 517         int rc;
 518
 519         INIT_LIST_HEAD(&g_smsdvb_clients);
 520         kmutex_init(&g_smsdvb_clientslock);
 521
 522         rc = smscore_register_hotplug(smsdvb_hotplug);
 523
 524         sms_debug("");
 525
 526         return rc;
 527 }
 528
 529 void smsdvb_unregister(void)
 530 {
 531         smscore_unregister_hotplug(smsdvb_hotplug);
 532
 533         kmutex_lock(&g_smsdvb_clientslock);
 534
 535         while (!list_empty(&g_smsdvb_clients))
 536                smsdvb_unregister_client(
 537                         (struct smsdvb_client_t *) g_smsdvb_clients.next);
 538
 539         kmutex_unlock(&g_smsdvb_clientslock);
 540 }