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   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 <linux/module.h>
  23 #include <linux/init.h>
  24
  25 #include "smscoreapi.h"
  26 #include "smsendian.h"
  27 #include "sms-cards.h"
  28
  29 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  30
  31 struct smsdvb_client_t {
  32         struct list_head entry;
  33
  34         struct smscore_device_t *coredev;
  35         struct smscore_client_t *smsclient;
  36
  37         struct dvb_adapter      adapter;
  38         struct dvb_demux        demux;
  39         struct dmxdev           dmxdev;
  40         struct dvb_frontend     frontend;
  41
  42         fe_status_t             fe_status;
  43         int                     fe_ber, fe_snr, fe_unc, fe_signal_strength;
  44
  45         struct completion       tune_done, stat_done;
  46
  47         /* todo: save freq/band instead whole struct */
  48         struct dvb_frontend_parameters fe_params;
  49 };
  50
  51 static struct list_head g_smsdvb_clients;
  52 static struct mutex g_smsdvb_clientslock;
  53
  54 static int sms_dbg;
  55 module_param_named(debug, sms_dbg, int, 0644);
  56 MODULE_PARM_DESC(debug, "set debug level (info=1, adv=2 (or-able))");
  57
  58 static int smsdvb_onresponse(void *context, struct smscore_buffer_t *cb)
  59 {
  60         struct smsdvb_client_t *client = (struct smsdvb_client_t *) context;
  61         struct SmsMsgHdr_ST *phdr =
  62                 (struct SmsMsgHdr_ST *)(((u8 *) cb->p) + cb->offset);
  63
  64         smsendian_handle_rx_message((struct SmsMsgData_ST *) phdr);
  65
  66         switch (phdr->msgType) {
  67         case MSG_SMS_DVBT_BDA_DATA:
  68                 dvb_dmx_swfilter(&client->demux, (u8 *)(phdr + 1),
  69                                  cb->size - sizeof(struct SmsMsgHdr_ST));
  70                 break;
  71
  72         case MSG_SMS_RF_TUNE_RES:
  73                 complete(&client->tune_done);
  74                 break;
  75
  76         case MSG_SMS_GET_STATISTICS_RES:
  77         {
  78                 struct SmsMsgStatisticsInfo_ST *p =
  79                         (struct SmsMsgStatisticsInfo_ST *)(phdr + 1);
  80
  81                 if (p->Stat.IsDemodLocked) {
  82                         client->fe_status = FE_HAS_SIGNAL |
  83                                             FE_HAS_CARRIER |
  84                                             FE_HAS_VITERBI |
  85                                             FE_HAS_SYNC |
  86                                             FE_HAS_LOCK;
  87
  88                         client->fe_snr = p->Stat.SNR;
  89                         client->fe_ber = p->Stat.BER;
  90                         client->fe_unc = p->Stat.BERErrorCount;
  91
  92                         if (p->Stat.InBandPwr < -95)
  93                                 client->fe_signal_strength = 0;
  94                         else if (p->Stat.InBandPwr > -29)
  95                                 client->fe_signal_strength = 100;
  96                         else
  97                                 client->fe_signal_strength =
  98                                         (p->Stat.InBandPwr + 95) * 3 / 2;
  99                 } else {
 100                         client->fe_status = 0;
 101                         client->fe_snr =
 102                         client->fe_ber =
 103                         client->fe_unc =
 104                         client->fe_signal_strength = 0;
 105                 }
 106
 107                 complete(&client->stat_done);
 108                 break;
 109         } }
 110
 111         smscore_putbuffer(client->coredev, cb);
 112
 113         return 0;
 114 }
 115
 116 static void smsdvb_unregister_client(struct smsdvb_client_t *client)
 117 {
 118         /* must be called under clientslock */
 119
 120         list_del(&client->entry);
 121
 122         smscore_unregister_client(client->smsclient);
 123         dvb_unregister_frontend(&client->frontend);
 124         dvb_dmxdev_release(&client->dmxdev);
 125         dvb_dmx_release(&client->demux);
 126         dvb_unregister_adapter(&client->adapter);
 127         kfree(client);
 128 }
 129
 130 static void smsdvb_onremove(void *context)
 131 {
 132         kmutex_lock(&g_smsdvb_clientslock);
 133
 134         smsdvb_unregister_client((struct smsdvb_client_t *) context);
 135
 136         kmutex_unlock(&g_smsdvb_clientslock);
 137 }
 138
 139 static int smsdvb_start_feed(struct dvb_demux_feed *feed)
 140 {
 141         struct smsdvb_client_t *client =
 142                 container_of(feed->demux, struct smsdvb_client_t, demux);
 143         struct SmsMsgData_ST PidMsg;
 144
 145         sms_debug("add pid %d(%x)",
 146                   feed->pid, feed->pid);
 147
 148         PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
 149         PidMsg.xMsgHeader.msgDstId = HIF_TASK;
 150         PidMsg.xMsgHeader.msgFlags = 0;
 151         PidMsg.xMsgHeader.msgType  = MSG_SMS_ADD_PID_FILTER_REQ;
 152         PidMsg.xMsgHeader.msgLength = sizeof(PidMsg);
 153         PidMsg.msgData[0] = feed->pid;
 154
 155         smsendian_handle_tx_message((struct SmsMsgHdr_ST *)&PidMsg);
 156         return smsclient_sendrequest(client->smsclient,
 157                                      &PidMsg, sizeof(PidMsg));
 158 }
 159
 160 static int smsdvb_stop_feed(struct dvb_demux_feed *feed)
 161 {
 162         struct smsdvb_client_t *client =
 163                 container_of(feed->demux, struct smsdvb_client_t, demux);
 164         struct SmsMsgData_ST PidMsg;
 165
 166         sms_debug("remove pid %d(%x)",
 167                   feed->pid, feed->pid);
 168
 169         PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
 170         PidMsg.xMsgHeader.msgDstId = HIF_TASK;
 171         PidMsg.xMsgHeader.msgFlags = 0;
 172         PidMsg.xMsgHeader.msgType  = MSG_SMS_REMOVE_PID_FILTER_REQ;
 173         PidMsg.xMsgHeader.msgLength = sizeof(PidMsg);
 174         PidMsg.msgData[0] = feed->pid;
 175
 176         smsendian_handle_tx_message((struct SmsMsgHdr_ST *)&PidMsg);
 177         return smsclient_sendrequest(client->smsclient,
 178                                      &PidMsg, sizeof(PidMsg));
 179 }
 180
 181 static int smsdvb_sendrequest_and_wait(struct smsdvb_client_t *client,
 182                                         void *buffer, size_t size,
 183                                         struct completion *completion)
 184 {
 185         int rc;
 186
 187         smsendian_handle_tx_message((struct SmsMsgHdr_ST *)buffer);
 188         rc = smsclient_sendrequest(client->smsclient, buffer, size);
 189         if (rc < 0)
 190                 return rc;
 191
 192         return wait_for_completion_timeout(completion,
 193                                            msecs_to_jiffies(2000)) ?
 194                                                 0 : -ETIME;
 195 }
 196
 197 static int smsdvb_send_statistics_request(struct smsdvb_client_t *client)
 198 {
 199         struct SmsMsgHdr_ST Msg = { MSG_SMS_GET_STATISTICS_REQ,
 200                              DVBT_BDA_CONTROL_MSG_ID,
 201                              HIF_TASK, sizeof(struct SmsMsgHdr_ST), 0 };
 202         int ret = smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 203                                               &client->stat_done);
 204         if (ret < 0)
 205                 return ret;
 206
 207         if (client->fe_status & FE_HAS_LOCK)
 208                 sms_board_led_feedback(client->coredev,
 209                                        (client->fe_unc == 0) ?
 210                                        SMS_LED_HI : SMS_LED_LO);
 211         else
 212                 sms_board_led_feedback(client->coredev, SMS_LED_OFF);
 213         return ret;
 214 }
 215
 216 static int smsdvb_read_status(struct dvb_frontend *fe, fe_status_t *stat)
 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                 *stat = client->fe_status;
 224
 225         return rc;
 226 }
 227
 228 static int smsdvb_read_ber(struct dvb_frontend *fe, u32 *ber)
 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                 *ber = client->fe_ber;
 236
 237         return rc;
 238 }
 239
 240 static int smsdvb_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 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                 *strength = client->fe_signal_strength;
 248
 249         return rc;
 250 }
 251
 252 static int smsdvb_read_snr(struct dvb_frontend *fe, u16 *snr)
 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                 *snr = client->fe_snr;
 260
 261         return rc;
 262 }
 263
 264 static int smsdvb_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 265 {
 266         struct smsdvb_client_t *client =
 267                 container_of(fe, struct smsdvb_client_t, frontend);
 268         int rc = smsdvb_send_statistics_request(client);
 269
 270         if (!rc)
 271                 *ucblocks = client->fe_unc;
 272
 273         return rc;
 274 }
 275
 276 static int smsdvb_get_tune_settings(struct dvb_frontend *fe,
 277                                     struct dvb_frontend_tune_settings *tune)
 278 {
 279         sms_debug("");
 280
 281         tune->min_delay_ms = 400;
 282         tune->step_size = 250000;
 283         tune->max_drift = 0;
 284         return 0;
 285 }
 286
 287 static int smsdvb_set_frontend(struct dvb_frontend *fe,
 288                                struct dvb_frontend_parameters *fep)
 289 {
 290         struct smsdvb_client_t *client =
 291                 container_of(fe, struct smsdvb_client_t, frontend);
 292
 293         struct {
 294                 struct SmsMsgHdr_ST     Msg;
 295                 u32             Data[3];
 296         } Msg;
 297         int ret;
 298
 299         Msg.Msg.msgSrcId  = DVBT_BDA_CONTROL_MSG_ID;
 300         Msg.Msg.msgDstId  = HIF_TASK;
 301         Msg.Msg.msgFlags  = 0;
 302         Msg.Msg.msgType   = MSG_SMS_RF_TUNE_REQ;
 303         Msg.Msg.msgLength = sizeof(Msg);
 304         Msg.Data[0] = fep->frequency;
 305         Msg.Data[2] = 12000000;
 306
 307         sms_debug("freq %d band %d",
 308                   fep->frequency, fep->u.ofdm.bandwidth);
 309
 310         switch (fep->u.ofdm.bandwidth) {
 311         case BANDWIDTH_8_MHZ: Msg.Data[1] = BW_8_MHZ; break;
 312         case BANDWIDTH_7_MHZ: Msg.Data[1] = BW_7_MHZ; break;
 313         case BANDWIDTH_6_MHZ: Msg.Data[1] = BW_6_MHZ; break;
 314         case BANDWIDTH_AUTO: return -EOPNOTSUPP;
 315         default: return -EINVAL;
 316         }
 317
 318         /* Disable LNA, if any. An error is returned if no LNA is present */
 319         ret = sms_board_lna_control(client->coredev, 0);
 320         if (ret == 0) {
 321                 fe_status_t status;
 322
 323                 /* tune with LNA off at first */
 324                 ret = smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 325                                                   &client->tune_done);
 326
 327                 smsdvb_read_status(fe, &status);
 328
 329                 if (status & FE_HAS_LOCK)
 330                         return ret;
 331
 332                 /* previous tune didnt lock - enable LNA and tune again */
 333                 sms_board_lna_control(client->coredev, 1);
 334         }
 335
 336         return smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 337                                            &client->tune_done);
 338 }
 339
 340 static int smsdvb_get_frontend(struct dvb_frontend *fe,
 341                                struct dvb_frontend_parameters *fep)
 342 {
 343         struct smsdvb_client_t *client =
 344                 container_of(fe, struct smsdvb_client_t, frontend);
 345
 346         sms_debug("");
 347
 348         /* todo: */
 349         memcpy(fep, &client->fe_params,
 350                sizeof(struct dvb_frontend_parameters));
 351
 352         return 0;
 353 }
 354
 355 static int smsdvb_init(struct dvb_frontend *fe)
 356 {
 357         struct smsdvb_client_t *client =
 358                 container_of(fe, struct smsdvb_client_t, frontend);
 359
 360         sms_board_power(client->coredev, 1);
 361
 362         return 0;
 363 }
 364
 365 static int smsdvb_sleep(struct dvb_frontend *fe)
 366 {
 367         struct smsdvb_client_t *client =
 368                 container_of(fe, struct smsdvb_client_t, frontend);
 369
 370         sms_board_led_feedback(client->coredev, SMS_LED_OFF);
 371         sms_board_power(client->coredev, 0);
 372
 373         return 0;
 374 }
 375
 376 static void smsdvb_release(struct dvb_frontend *fe)
 377 {
 378         /* do nothing */
 379 }
 380
 381 static struct dvb_frontend_ops smsdvb_fe_ops = {
 382         .info = {
 383                 .name                   = "Siano Mobile Digital MDTV Receiver",
 384                 .type                   = FE_OFDM,
 385                 .frequency_min          = 44250000,
 386                 .frequency_max          = 867250000,
 387                 .frequency_stepsize     = 250000,
 388                 .caps = FE_CAN_INVERSION_AUTO |
 389                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 390                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 391                         FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
 392                         FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
 393                         FE_CAN_GUARD_INTERVAL_AUTO |
 394                         FE_CAN_RECOVER |
 395                         FE_CAN_HIERARCHY_AUTO,
 396         },
 397
 398         .release = smsdvb_release,
 399
 400         .set_frontend = smsdvb_set_frontend,
 401         .get_frontend = smsdvb_get_frontend,
 402         .get_tune_settings = smsdvb_get_tune_settings,
 403
 404         .read_status = smsdvb_read_status,
 405         .read_ber = smsdvb_read_ber,
 406         .read_signal_strength = smsdvb_read_signal_strength,
 407         .read_snr = smsdvb_read_snr,
 408         .read_ucblocks = smsdvb_read_ucblocks,
 409
 410         .init = smsdvb_init,
 411         .sleep = smsdvb_sleep,
 412 };
 413
 414 static int smsdvb_hotplug(struct smscore_device_t *coredev,
 415                           struct device *device, int arrival)
 416 {
 417         struct smsclient_params_t params;
 418         struct smsdvb_client_t *client;
 419         int rc;
 420
 421         /* device removal handled by onremove callback */
 422         if (!arrival)
 423                 return 0;
 424
 425         if (smscore_get_device_mode(coredev) != DEVICE_MODE_DVBT_BDA) {
 426                 sms_err("SMS Device mode is not set for "
 427                         "DVB operation.");
 428                 return 0;
 429         }
 430
 431         client = kzalloc(sizeof(struct smsdvb_client_t), GFP_KERNEL);
 432         if (!client) {
 433                 sms_err("kmalloc() failed");
 434                 return -ENOMEM;
 435         }
 436
 437         /* register dvb adapter */
 438         rc = dvb_register_adapter(&client->adapter,
 439                                   sms_get_board(
 440                                         smscore_get_board_id(coredev))->name,
 441                                   THIS_MODULE, device, adapter_nr);
 442         if (rc < 0) {
 443                 sms_err("dvb_register_adapter() failed %d", rc);
 444                 goto adapter_error;
 445         }
 446
 447         /* init dvb demux */
 448         client->demux.dmx.capabilities = DMX_TS_FILTERING;
 449         client->demux.filternum = 32; /* todo: nova ??? */
 450         client->demux.feednum = 32;
 451         client->demux.start_feed = smsdvb_start_feed;
 452         client->demux.stop_feed = smsdvb_stop_feed;
 453
 454         rc = dvb_dmx_init(&client->demux);
 455         if (rc < 0) {
 456                 sms_err("dvb_dmx_init failed %d", rc);
 457                 goto dvbdmx_error;
 458         }
 459
 460         /* init dmxdev */
 461         client->dmxdev.filternum = 32;
 462         client->dmxdev.demux = &client->demux.dmx;
 463         client->dmxdev.capabilities = 0;
 464
 465         rc = dvb_dmxdev_init(&client->dmxdev, &client->adapter);
 466         if (rc < 0) {
 467                 sms_err("dvb_dmxdev_init failed %d", rc);
 468                 goto dmxdev_error;
 469         }
 470
 471         /* init and register frontend */
 472         memcpy(&client->frontend.ops, &smsdvb_fe_ops,
 473                sizeof(struct dvb_frontend_ops));
 474
 475         rc = dvb_register_frontend(&client->adapter, &client->frontend);
 476         if (rc < 0) {
 477                 sms_err("frontend registration failed %d", rc);
 478                 goto frontend_error;
 479         }
 480
 481         params.initial_id = 1;
 482         params.data_type = MSG_SMS_DVBT_BDA_DATA;
 483         params.onresponse_handler = smsdvb_onresponse;
 484         params.onremove_handler = smsdvb_onremove;
 485         params.context = client;
 486
 487         rc = smscore_register_client(coredev, &params, &client->smsclient);
 488         if (rc < 0) {
 489                 sms_err("smscore_register_client() failed %d", rc);
 490                 goto client_error;
 491         }
 492
 493         client->coredev = coredev;
 494
 495         init_completion(&client->tune_done);
 496
 497         kmutex_lock(&g_smsdvb_clientslock);
 498
 499         list_add(&client->entry, &g_smsdvb_clients);
 500
 501         kmutex_unlock(&g_smsdvb_clientslock);
 502
 503         sms_info("success");
 504
 505         sms_board_setup(coredev);
 506
 507         return 0;
 508
 509 client_error:
 510         dvb_unregister_frontend(&client->frontend);
 511
 512 frontend_error:
 513         dvb_dmxdev_release(&client->dmxdev);
 514
 515 dmxdev_error:
 516         dvb_dmx_release(&client->demux);
 517
 518 dvbdmx_error:
 519         dvb_unregister_adapter(&client->adapter);
 520
 521 adapter_error:
 522         kfree(client);
 523         return rc;
 524 }
 525
 526 int smsdvb_module_init(void)
 527 {
 528         int rc;
 529
 530         INIT_LIST_HEAD(&g_smsdvb_clients);
 531         kmutex_init(&g_smsdvb_clientslock);
 532
 533         rc = smscore_register_hotplug(smsdvb_hotplug);
 534
 535         sms_debug("");
 536
 537         return rc;
 538 }
 539
 540 void smsdvb_module_exit(void)
 541 {
 542         smscore_unregister_hotplug(smsdvb_hotplug);
 543
 544         kmutex_lock(&g_smsdvb_clientslock);
 545
 546         while (!list_empty(&g_smsdvb_clients))
 547                smsdvb_unregister_client(
 548                         (struct smsdvb_client_t *) g_smsdvb_clients.next);
 549
 550         kmutex_unlock(&g_smsdvb_clientslock);
 551 }
 552
 553 module_init(smsdvb_module_init);
 554 module_exit(smsdvb_module_exit);
 555
 556 MODULE_DESCRIPTION("SMS DVB subsystem adaptation module");
 557 MODULE_AUTHOR("Siano Mobile Silicon, INC. (uris@siano-ms.com)");
 558 MODULE_LICENSE("GPL");