drivers/media/dvb/siano/smsdvb.c

   1 /*
   2  *  Driver for the Siano SMS1xxx USB dongle
   3  *
   4  *  Author: Uri Shkolni
   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 sms_dbg;
  54 module_param_named(debug, sms_dbg, int, 0644);
  55 MODULE_PARM_DESC(debug, "set debug level (info=1, adv=2 (or-able))");
  56
  57 static int smsdvb_onresponse(void *context, struct smscore_buffer_t *cb)
  58 {
  59         struct smsdvb_client_t *client = (struct smsdvb_client_t *) context;
  60         struct SmsMsgHdr_ST *phdr =
  61                 (struct SmsMsgHdr_ST *)(((u8 *) cb->p) + cb->offset);
  62
  63         switch (phdr->msgType) {
  64         case MSG_SMS_DVBT_BDA_DATA:
  65                 dvb_dmx_swfilter(&client->demux, (u8 *)(phdr + 1),
  66                                  cb->size - sizeof(struct SmsMsgHdr_ST));
  67                 break;
  68
  69         case MSG_SMS_RF_TUNE_RES:
  70                 complete(&client->tune_done);
  71                 break;
  72
  73         case MSG_SMS_GET_STATISTICS_RES:
  74         {
  75                 struct SmsMsgStatisticsInfo_ST *p =
  76                         (struct SmsMsgStatisticsInfo_ST *)(phdr + 1);
  77
  78                 if (p->Stat.IsDemodLocked) {
  79                         client->fe_status = FE_HAS_SIGNAL |
  80                                             FE_HAS_CARRIER |
  81                                             FE_HAS_VITERBI |
  82                                             FE_HAS_SYNC |
  83                                             FE_HAS_LOCK;
  84
  85                         client->fe_snr = p->Stat.SNR;
  86                         client->fe_ber = p->Stat.BER;
  87                         client->fe_unc = p->Stat.BERErrorCount;
  88
  89                         if (p->Stat.InBandPwr < -95)
  90                                 client->fe_signal_strength = 0;
  91                         else if (p->Stat.InBandPwr > -29)
  92                                 client->fe_signal_strength = 100;
  93                         else
  94                                 client->fe_signal_strength =
  95                                         (p->Stat.InBandPwr + 95) * 3 / 2;
  96                 } else {
  97                         client->fe_status = 0;
  98                         client->fe_snr =
  99                         client->fe_ber =
 100                         client->fe_unc =
 101                         client->fe_signal_strength = 0;
 102                 }
 103
 104                 complete(&client->stat_done);
 105                 break;
 106         } }
 107
 108         smscore_putbuffer(client->coredev, cb);
 109
 110         return 0;
 111 }
 112
 113 static void smsdvb_unregister_client(struct smsdvb_client_t *client)
 114 {
 115         /* must be called under clientslock */
 116
 117         list_del(&client->entry);
 118
 119         smscore_unregister_client(client->smsclient);
 120         dvb_unregister_frontend(&client->frontend);
 121         dvb_dmxdev_release(&client->dmxdev);
 122         dvb_dmx_release(&client->demux);
 123         dvb_unregister_adapter(&client->adapter);
 124         kfree(client);
 125 }
 126
 127 static void smsdvb_onremove(void *context)
 128 {
 129         kmutex_lock(&g_smsdvb_clientslock);
 130
 131         smsdvb_unregister_client((struct smsdvb_client_t *) context);
 132
 133         kmutex_unlock(&g_smsdvb_clientslock);
 134 }
 135
 136 static int smsdvb_start_feed(struct dvb_demux_feed *feed)
 137 {
 138         struct smsdvb_client_t *client =
 139                 container_of(feed->demux, struct smsdvb_client_t, demux);
 140         struct SmsMsgData_ST PidMsg;
 141
 142         sms_debug("add pid %d(%x)",
 143                   feed->pid, feed->pid);
 144
 145         PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
 146         PidMsg.xMsgHeader.msgDstId = HIF_TASK;
 147         PidMsg.xMsgHeader.msgFlags = 0;
 148         PidMsg.xMsgHeader.msgType  = MSG_SMS_ADD_PID_FILTER_REQ;
 149         PidMsg.xMsgHeader.msgLength = sizeof(PidMsg);
 150         PidMsg.msgData[0] = feed->pid;
 151
 152         return smsclient_sendrequest(client->smsclient,
 153                                      &PidMsg, sizeof(PidMsg));
 154 }
 155
 156 static int smsdvb_stop_feed(struct dvb_demux_feed *feed)
 157 {
 158         struct smsdvb_client_t *client =
 159                 container_of(feed->demux, struct smsdvb_client_t, demux);
 160         struct SmsMsgData_ST PidMsg;
 161
 162         sms_debug("remove pid %d(%x)",
 163                   feed->pid, feed->pid);
 164
 165         PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
 166         PidMsg.xMsgHeader.msgDstId = HIF_TASK;
 167         PidMsg.xMsgHeader.msgFlags = 0;
 168         PidMsg.xMsgHeader.msgType  = MSG_SMS_REMOVE_PID_FILTER_REQ;
 169         PidMsg.xMsgHeader.msgLength = sizeof(PidMsg);
 170         PidMsg.msgData[0] = feed->pid;
 171
 172         return smsclient_sendrequest(client->smsclient,
 173                                      &PidMsg, sizeof(PidMsg));
 174 }
 175
 176 static int smsdvb_sendrequest_and_wait(struct smsdvb_client_t *client,
 177                                         void *buffer, size_t size,
 178                                         struct completion *completion)
 179 {
 180         int rc = smsclient_sendrequest(client->smsclient, buffer, size);
 181         if (rc < 0)
 182                 return rc;
 183
 184         return wait_for_completion_timeout(completion,
 185                                            msecs_to_jiffies(2000)) ?
 186                                                 0 : -ETIME;
 187 }
 188
 189 static int smsdvb_send_statistics_request(struct smsdvb_client_t *client)
 190 {
 191         struct SmsMsgHdr_ST Msg = { MSG_SMS_GET_STATISTICS_REQ,
 192                              DVBT_BDA_CONTROL_MSG_ID,
 193                              HIF_TASK, sizeof(struct SmsMsgHdr_ST), 0 };
 194         int ret = smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 195                                               &client->stat_done);
 196         if (ret < 0)
 197                 return ret;
 198
 199         if (client->fe_status & FE_HAS_LOCK)
 200                 sms_board_led_feedback(client->coredev,
 201                                        (client->fe_unc == 0) ?
 202                                        SMS_LED_HI : SMS_LED_LO);
 203         else
 204                 sms_board_led_feedback(client->coredev, SMS_LED_OFF);
 205         return ret;
 206 }
 207
 208 static int smsdvb_read_status(struct dvb_frontend *fe, fe_status_t *stat)
 209 {
 210         struct smsdvb_client_t *client =
 211                 container_of(fe, struct smsdvb_client_t, frontend);
 212         int rc = smsdvb_send_statistics_request(client);
 213
 214         if (!rc)
 215                 *stat = client->fe_status;
 216
 217         return rc;
 218 }
 219
 220 static int smsdvb_read_ber(struct dvb_frontend *fe, u32 *ber)
 221 {
 222         struct smsdvb_client_t *client =
 223                 container_of(fe, struct smsdvb_client_t, frontend);
 224         int rc = smsdvb_send_statistics_request(client);
 225
 226         if (!rc)
 227                 *ber = client->fe_ber;
 228
 229         return rc;
 230 }
 231
 232 static int smsdvb_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 233 {
 234         struct smsdvb_client_t *client =
 235                 container_of(fe, struct smsdvb_client_t, frontend);
 236         int rc = smsdvb_send_statistics_request(client);
 237
 238         if (!rc)
 239                 *strength = client->fe_signal_strength;
 240
 241         return rc;
 242 }
 243
 244 static int smsdvb_read_snr(struct dvb_frontend *fe, u16 *snr)
 245 {
 246         struct smsdvb_client_t *client =
 247                 container_of(fe, struct smsdvb_client_t, frontend);
 248         int rc = smsdvb_send_statistics_request(client);
 249
 250         if (!rc)
 251                 *snr = client->fe_snr;
 252
 253         return rc;
 254 }
 255
 256 static int smsdvb_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 257 {
 258         struct smsdvb_client_t *client =
 259                 container_of(fe, struct smsdvb_client_t, frontend);
 260         int rc = smsdvb_send_statistics_request(client);
 261
 262         if (!rc)
 263                 *ucblocks = client->fe_unc;
 264
 265         return rc;
 266 }
 267
 268 static int smsdvb_get_tune_settings(struct dvb_frontend *fe,
 269                                     struct dvb_frontend_tune_settings *tune)
 270 {
 271         sms_debug("");
 272
 273         tune->min_delay_ms = 400;
 274         tune->step_size = 250000;
 275         tune->max_drift = 0;
 276         return 0;
 277 }
 278
 279 static int smsdvb_set_frontend(struct dvb_frontend *fe,
 280                                struct dvb_frontend_parameters *fep)
 281 {
 282         struct smsdvb_client_t *client =
 283                 container_of(fe, struct smsdvb_client_t, frontend);
 284
 285         struct {
 286                 struct SmsMsgHdr_ST     Msg;
 287                 u32             Data[3];
 288         } Msg;
 289         int ret;
 290
 291         Msg.Msg.msgSrcId  = DVBT_BDA_CONTROL_MSG_ID;
 292         Msg.Msg.msgDstId  = HIF_TASK;
 293         Msg.Msg.msgFlags  = 0;
 294         Msg.Msg.msgType   = MSG_SMS_RF_TUNE_REQ;
 295         Msg.Msg.msgLength = sizeof(Msg);
 296         Msg.Data[0] = fep->frequency;
 297         Msg.Data[2] = 12000000;
 298
 299         sms_debug("freq %d band %d",
 300                   fep->frequency, fep->u.ofdm.bandwidth);
 301
 302         switch (fep->u.ofdm.bandwidth) {
 303         case BANDWIDTH_8_MHZ: Msg.Data[1] = BW_8_MHZ; break;
 304         case BANDWIDTH_7_MHZ: Msg.Data[1] = BW_7_MHZ; break;
 305         case BANDWIDTH_6_MHZ: Msg.Data[1] = BW_6_MHZ; break;
 306         case BANDWIDTH_AUTO: return -EOPNOTSUPP;
 307         default: return -EINVAL;
 308         }
 309
 310         /* Disable LNA, if any. An error is returned if no LNA is present */
 311         ret = sms_board_lna_control(client->coredev, 0);
 312         if (ret == 0) {
 313                 fe_status_t status;
 314
 315                 /* tune with LNA off at first */
 316                 ret = smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 317                                                   &client->tune_done);
 318
 319                 smsdvb_read_status(fe, &status);
 320
 321                 if (status & FE_HAS_LOCK)
 322                         return ret;
 323
 324                 /* previous tune didnt lock - enable LNA and tune again */
 325                 sms_board_lna_control(client->coredev, 1);
 326         }
 327
 328         return smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 329                                            &client->tune_done);
 330 }
 331
 332 static int smsdvb_get_frontend(struct dvb_frontend *fe,
 333                                struct dvb_frontend_parameters *fep)
 334 {
 335         struct smsdvb_client_t *client =
 336                 container_of(fe, struct smsdvb_client_t, frontend);
 337
 338         sms_debug("");
 339
 340         /* todo: */
 341         memcpy(fep, &client->fe_params,
 342                sizeof(struct dvb_frontend_parameters));
 343
 344         return 0;
 345 }
 346
 347 static int smsdvb_init(struct dvb_frontend *fe)
 348 {
 349         struct smsdvb_client_t *client =
 350                 container_of(fe, struct smsdvb_client_t, frontend);
 351
 352         sms_board_power(client->coredev, 1);
 353
 354         return 0;
 355 }
 356
 357 static int smsdvb_sleep(struct dvb_frontend *fe)
 358 {
 359         struct smsdvb_client_t *client =
 360                 container_of(fe, struct smsdvb_client_t, frontend);
 361
 362         sms_board_led_feedback(client->coredev, SMS_LED_OFF);
 363         sms_board_power(client->coredev, 0);
 364
 365         return 0;
 366 }
 367
 368 static void smsdvb_release(struct dvb_frontend *fe)
 369 {
 370         /* do nothing */
 371 }
 372
 373 static struct dvb_frontend_ops smsdvb_fe_ops = {
 374         .info = {
 375                 .name                   = "Siano Mobile Digital MDTV Receiver",
 376                 .type                   = FE_OFDM,
 377                 .frequency_min          = 44250000,
 378                 .frequency_max          = 867250000,
 379                 .frequency_stepsize     = 250000,
 380                 .caps = FE_CAN_INVERSION_AUTO |
 381                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 382                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 383                         FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
 384                         FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
 385                         FE_CAN_GUARD_INTERVAL_AUTO |
 386                         FE_CAN_RECOVER |
 387                         FE_CAN_HIERARCHY_AUTO,
 388         },
 389
 390         .release = smsdvb_release,
 391
 392         .set_frontend = smsdvb_set_frontend,
 393         .get_frontend = smsdvb_get_frontend,
 394         .get_tune_settings = smsdvb_get_tune_settings,
 395
 396         .read_status = smsdvb_read_status,
 397         .read_ber = smsdvb_read_ber,
 398         .read_signal_strength = smsdvb_read_signal_strength,
 399         .read_snr = smsdvb_read_snr,
 400         .read_ucblocks = smsdvb_read_ucblocks,
 401
 402         .init = smsdvb_init,
 403         .sleep = smsdvb_sleep,
 404 };
 405
 406 static int smsdvb_hotplug(struct smscore_device_t *coredev,
 407                           struct device *device, int arrival)
 408 {
 409         struct smsclient_params_t params;
 410         struct smsdvb_client_t *client;
 411         int rc;
 412
 413         /* device removal handled by onremove callback */
 414         if (!arrival)
 415                 return 0;
 416
 417         if (smscore_get_device_mode(coredev) != DEVICE_MODE_DVBT_BDA) {
 418                 sms_err("SMS Device mode is not set for "
 419                         "DVB operation.");
 420                 return 0;
 421         }
 422
 423         client = kzalloc(sizeof(struct smsdvb_client_t), GFP_KERNEL);
 424         if (!client) {
 425                 sms_err("kmalloc() failed");
 426                 return -ENOMEM;
 427         }
 428
 429         /* register dvb adapter */
 430         rc = dvb_register_adapter(&client->adapter,
 431                                   sms_get_board(
 432                                         smscore_get_board_id(coredev))->name,
 433                                   THIS_MODULE, device, adapter_nr);
 434         if (rc < 0) {
 435                 sms_err("dvb_register_adapter() failed %d", rc);
 436                 goto adapter_error;
 437         }
 438
 439         /* init dvb demux */
 440         client->demux.dmx.capabilities = DMX_TS_FILTERING;
 441         client->demux.filternum = 32; /* todo: nova ??? */
 442         client->demux.feednum = 32;
 443         client->demux.start_feed = smsdvb_start_feed;
 444         client->demux.stop_feed = smsdvb_stop_feed;
 445
 446         rc = dvb_dmx_init(&client->demux);
 447         if (rc < 0) {
 448                 sms_err("dvb_dmx_init failed %d", rc);
 449                 goto dvbdmx_error;
 450         }
 451
 452         /* init dmxdev */
 453         client->dmxdev.filternum = 32;
 454         client->dmxdev.demux = &client->demux.dmx;
 455         client->dmxdev.capabilities = 0;
 456
 457         rc = dvb_dmxdev_init(&client->dmxdev, &client->adapter);
 458         if (rc < 0) {
 459                 sms_err("dvb_dmxdev_init failed %d", rc);
 460                 goto dmxdev_error;
 461         }
 462
 463         /* init and register frontend */
 464         memcpy(&client->frontend.ops, &smsdvb_fe_ops,
 465                sizeof(struct dvb_frontend_ops));
 466
 467         rc = dvb_register_frontend(&client->adapter, &client->frontend);
 468         if (rc < 0) {
 469                 sms_err("frontend registration failed %d", rc);
 470                 goto frontend_error;
 471         }
 472
 473         params.initial_id = 1;
 474         params.data_type = MSG_SMS_DVBT_BDA_DATA;
 475         params.onresponse_handler = smsdvb_onresponse;
 476         params.onremove_handler = smsdvb_onremove;
 477         params.context = client;
 478
 479         rc = smscore_register_client(coredev, &params, &client->smsclient);
 480         if (rc < 0) {
 481                 sms_err("smscore_register_client() failed %d", rc);
 482                 goto client_error;
 483         }
 484
 485         client->coredev = coredev;
 486
 487         init_completion(&client->tune_done);
 488         init_completion(&client->stat_done);
 489
 490         kmutex_lock(&g_smsdvb_clientslock);
 491
 492         list_add(&client->entry, &g_smsdvb_clients);
 493
 494         kmutex_unlock(&g_smsdvb_clientslock);
 495
 496         sms_info("success");
 497
 498         sms_board_setup(coredev);
 499
 500         return 0;
 501
 502 client_error:
 503         dvb_unregister_frontend(&client->frontend);
 504
 505 frontend_error:
 506         dvb_dmxdev_release(&client->dmxdev);
 507
 508 dmxdev_error:
 509         dvb_dmx_release(&client->demux);
 510
 511 dvbdmx_error:
 512         dvb_unregister_adapter(&client->adapter);
 513
 514 adapter_error:
 515         kfree(client);
 516         return rc;
 517 }
 518
 519 int smsdvb_module_init(void)
 520 {
 521         int rc;
 522
 523         INIT_LIST_HEAD(&g_smsdvb_clients);
 524         kmutex_init(&g_smsdvb_clientslock);
 525
 526         rc = smscore_register_hotplug(smsdvb_hotplug);
 527
 528         sms_debug("");
 529
 530         return rc;
 531 }
 532
 533 void smsdvb_module_exit(void)
 534 {
 535         smscore_unregister_hotplug(smsdvb_hotplug);
 536
 537         kmutex_lock(&g_smsdvb_clientslock);
 538
 539         while (!list_empty(&g_smsdvb_clients))
 540                smsdvb_unregister_client(
 541                         (struct smsdvb_client_t *) g_smsdvb_clients.next);
 542
 543         kmutex_unlock(&g_smsdvb_clientslock);
 544 }
 545
 546 module_init(smsdvb_module_init);
 547 module_exit(smsdvb_module_exit);
 548
 549 MODULE_DESCRIPTION("SMS DVB subsystem adaptation module");
 550 MODULE_AUTHOR("Siano Mobile Silicon, INC. (uris@siano-ms.com)");
 551 MODULE_LICENSE("GPL");