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 static struct list_head g_smsdvb_clients;
  31 static struct mutex g_smsdvb_clientslock;
  32
  33 static int smsdvb_onresponse(void *context, struct smscore_buffer_t *cb)
  34 {
  35         struct smsdvb_client_t *client = (struct smsdvb_client_t *) context;
  36         struct SmsMsgHdr_ST *phdr =
  37                 (struct SmsMsgHdr_ST *)(((u8 *) cb->p) + cb->offset);
  38
  39         switch (phdr->msgType) {
  40         case MSG_SMS_DVBT_BDA_DATA:
  41                 dvb_dmx_swfilter(&client->demux, (u8 *)(phdr + 1),
  42                                  cb->size - sizeof(struct SmsMsgHdr_ST));
  43                 break;
  44
  45         case MSG_SMS_RF_TUNE_RES:
  46                 complete(&client->tune_done);
  47                 break;
  48
  49         case MSG_SMS_GET_STATISTICS_RES:
  50         {
  51                 struct SmsMsgStatisticsInfo_ST *p =
  52                         (struct SmsMsgStatisticsInfo_ST *)(phdr + 1);
  53
  54                 if (p->Stat.IsDemodLocked) {
  55                         client->fe_status = FE_HAS_SIGNAL |
  56                                             FE_HAS_CARRIER |
  57                                             FE_HAS_VITERBI |
  58                                             FE_HAS_SYNC |
  59                                             FE_HAS_LOCK;
  60
  61                         client->fe_snr = p->Stat.SNR;
  62                         client->fe_ber = p->Stat.BER;
  63                         client->fe_unc = p->Stat.BERErrorCount;
  64
  65                         if (p->Stat.InBandPwr < -95)
  66                                 client->fe_signal_strength = 0;
  67                         else if (p->Stat.InBandPwr > -29)
  68                                 client->fe_signal_strength = 100;
  69                         else
  70                                 client->fe_signal_strength =
  71                                         (p->Stat.InBandPwr + 95) * 3 / 2;
  72                 } else {
  73                         client->fe_status = 0;
  74                         client->fe_snr =
  75                         client->fe_ber =
  76                         client->fe_unc =
  77                         client->fe_signal_strength = 0;
  78                 }
  79
  80                 complete(&client->stat_done);
  81                 break;
  82         } }
  83
  84         smscore_putbuffer(client->coredev, cb);
  85
  86         return 0;
  87 }
  88
  89 static void smsdvb_unregister_client(struct smsdvb_client_t *client)
  90 {
  91         /* must be called under clientslock */
  92
  93         list_del(&client->entry);
  94
  95         smscore_unregister_client(client->smsclient);
  96         dvb_unregister_frontend(&client->frontend);
  97         dvb_dmxdev_release(&client->dmxdev);
  98         dvb_dmx_release(&client->demux);
  99         dvb_unregister_adapter(&client->adapter);
 100         kfree(client);
 101 }
 102
 103 static void smsdvb_onremove(void *context)
 104 {
 105         kmutex_lock(&g_smsdvb_clientslock);
 106
 107         smsdvb_unregister_client((struct smsdvb_client_t *) context);
 108
 109         kmutex_unlock(&g_smsdvb_clientslock);
 110 }
 111
 112 static int smsdvb_start_feed(struct dvb_demux_feed *feed)
 113 {
 114         struct smsdvb_client_t *client =
 115                 container_of(feed->demux, struct smsdvb_client_t, demux);
 116         struct SmsMsgData_ST PidMsg;
 117
 118         sms_debug("add pid %d(%x)",
 119                   feed->pid, feed->pid);
 120
 121         PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
 122         PidMsg.xMsgHeader.msgDstId = HIF_TASK;
 123         PidMsg.xMsgHeader.msgFlags = 0;
 124         PidMsg.xMsgHeader.msgType  = MSG_SMS_ADD_PID_FILTER_REQ;
 125         PidMsg.xMsgHeader.msgLength = sizeof(PidMsg);
 126         PidMsg.msgData[0] = feed->pid;
 127
 128         return smsclient_sendrequest(client->smsclient,
 129                                      &PidMsg, sizeof(PidMsg));
 130 }
 131
 132 static int smsdvb_stop_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("remove 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_REMOVE_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_sendrequest_and_wait(struct smsdvb_client_t *client,
 153                                         void *buffer, size_t size,
 154                                         struct completion *completion)
 155 {
 156         int rc = smsclient_sendrequest(client->smsclient, buffer, size);
 157         if (rc < 0)
 158                 return rc;
 159
 160         return wait_for_completion_timeout(completion,
 161                                            msecs_to_jiffies(2000)) ?
 162                                                 0 : -ETIME;
 163 }
 164
 165 static int smsdvb_send_statistics_request(struct smsdvb_client_t *client)
 166 {
 167         struct SmsMsgHdr_ST Msg = { MSG_SMS_GET_STATISTICS_REQ,
 168                              DVBT_BDA_CONTROL_MSG_ID,
 169                              HIF_TASK, sizeof(struct SmsMsgHdr_ST), 0 };
 170         int ret = smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 171                                               &client->stat_done);
 172         if (ret < 0)
 173                 return ret;
 174
 175         if (client->fe_status & FE_HAS_LOCK)
 176                 sms_board_led_feedback(client->coredev,
 177                                        (client->fe_unc == 0) ?
 178                                        SMS_LED_HI : SMS_LED_LO);
 179         else
 180                 sms_board_led_feedback(client->coredev, SMS_LED_OFF);
 181         return ret;
 182 }
 183
 184 static int smsdvb_read_status(struct dvb_frontend *fe, fe_status_t *stat)
 185 {
 186         struct smsdvb_client_t *client =
 187                 container_of(fe, struct smsdvb_client_t, frontend);
 188         int rc = smsdvb_send_statistics_request(client);
 189
 190         if (!rc)
 191                 *stat = client->fe_status;
 192
 193         return rc;
 194 }
 195
 196 static int smsdvb_read_ber(struct dvb_frontend *fe, u32 *ber)
 197 {
 198         struct smsdvb_client_t *client =
 199                 container_of(fe, struct smsdvb_client_t, frontend);
 200         int rc = smsdvb_send_statistics_request(client);
 201
 202         if (!rc)
 203                 *ber = client->fe_ber;
 204
 205         return rc;
 206 }
 207
 208 static int smsdvb_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 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                 *strength = client->fe_signal_strength;
 216
 217         return rc;
 218 }
 219
 220 static int smsdvb_read_snr(struct dvb_frontend *fe, u16 *snr)
 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                 *snr = client->fe_snr;
 228
 229         return rc;
 230 }
 231
 232 static int smsdvb_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
 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                 *ucblocks = client->fe_unc;
 240
 241         return rc;
 242 }
 243
 244 static int smsdvb_get_tune_settings(struct dvb_frontend *fe,
 245                                     struct dvb_frontend_tune_settings *tune)
 246 {
 247         sms_debug("");
 248
 249         tune->min_delay_ms = 400;
 250         tune->step_size = 250000;
 251         tune->max_drift = 0;
 252         return 0;
 253 }
 254
 255 static int smsdvb_set_frontend(struct dvb_frontend *fe,
 256                                struct dvb_frontend_parameters *fep)
 257 {
 258         struct smsdvb_client_t *client =
 259                 container_of(fe, struct smsdvb_client_t, frontend);
 260
 261         struct {
 262                 struct SmsMsgHdr_ST     Msg;
 263                 u32             Data[3];
 264         } Msg;
 265
 266         Msg.Msg.msgSrcId  = DVBT_BDA_CONTROL_MSG_ID;
 267         Msg.Msg.msgDstId  = HIF_TASK;
 268         Msg.Msg.msgFlags  = 0;
 269         Msg.Msg.msgType   = MSG_SMS_RF_TUNE_REQ;
 270         Msg.Msg.msgLength = sizeof(Msg);
 271         Msg.Data[0] = fep->frequency;
 272         Msg.Data[2] = 12000000;
 273
 274         sms_debug("freq %d band %d",
 275                   fep->frequency, fep->u.ofdm.bandwidth);
 276
 277         switch (fep->u.ofdm.bandwidth) {
 278         case BANDWIDTH_8_MHZ: Msg.Data[1] = BW_8_MHZ; break;
 279         case BANDWIDTH_7_MHZ: Msg.Data[1] = BW_7_MHZ; break;
 280         case BANDWIDTH_6_MHZ: Msg.Data[1] = BW_6_MHZ; break;
 281         case BANDWIDTH_AUTO: return -EOPNOTSUPP;
 282         default: return -EINVAL;
 283         }
 284
 285         return smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 286                                            &client->tune_done);
 287 }
 288
 289 static int smsdvb_get_frontend(struct dvb_frontend *fe,
 290                                struct dvb_frontend_parameters *fep)
 291 {
 292         struct smsdvb_client_t *client =
 293                 container_of(fe, struct smsdvb_client_t, frontend);
 294
 295         sms_debug("");
 296
 297         /* todo: */
 298         memcpy(fep, &client->fe_params,
 299                sizeof(struct dvb_frontend_parameters));
 300
 301         return 0;
 302 }
 303
 304 static int smsdvb_init(struct dvb_frontend *fe)
 305 {
 306         struct smsdvb_client_t *client =
 307                 container_of(fe, struct smsdvb_client_t, frontend);
 308
 309         sms_board_power(client->coredev, 1);
 310
 311         return 0;
 312 }
 313
 314 static int smsdvb_sleep(struct dvb_frontend *fe)
 315 {
 316         struct smsdvb_client_t *client =
 317                 container_of(fe, struct smsdvb_client_t, frontend);
 318
 319         sms_board_led_feedback(client->coredev, SMS_LED_OFF);
 320         sms_board_power(client->coredev, 0);
 321
 322         return 0;
 323 }
 324
 325 static void smsdvb_release(struct dvb_frontend *fe)
 326 {
 327         /* do nothing */
 328 }
 329
 330 static struct dvb_frontend_ops smsdvb_fe_ops = {
 331         .info = {
 332                 .name                   = "Siano Mobile Digital SMS1xxx",
 333                 .type                   = FE_OFDM,
 334                 .frequency_min          = 44250000,
 335                 .frequency_max          = 867250000,
 336                 .frequency_stepsize     = 250000,
 337                 .caps = FE_CAN_INVERSION_AUTO |
 338                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 339                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 340                         FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
 341                         FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
 342                         FE_CAN_GUARD_INTERVAL_AUTO |
 343                         FE_CAN_RECOVER |
 344                         FE_CAN_HIERARCHY_AUTO,
 345         },
 346
 347         .release = smsdvb_release,
 348
 349         .set_frontend = smsdvb_set_frontend,
 350         .get_frontend = smsdvb_get_frontend,
 351         .get_tune_settings = smsdvb_get_tune_settings,
 352
 353         .read_status = smsdvb_read_status,
 354         .read_ber = smsdvb_read_ber,
 355         .read_signal_strength = smsdvb_read_signal_strength,
 356         .read_snr = smsdvb_read_snr,
 357         .read_ucblocks = smsdvb_read_ucblocks,
 358
 359         .init = smsdvb_init,
 360         .sleep = smsdvb_sleep,
 361 };
 362
 363 static int smsdvb_hotplug(struct smscore_device_t *coredev,
 364                           struct device *device, int arrival)
 365 {
 366         struct smsclient_params_t params;
 367         struct smsdvb_client_t *client;
 368         int rc;
 369
 370         /* device removal handled by onremove callback */
 371         if (!arrival)
 372                 return 0;
 373
 374         if (smscore_get_device_mode(coredev) != 4) {
 375                 sms_err("SMS Device mode is not set for "
 376                         "DVB operation.");
 377                 return 0;
 378         }
 379
 380         client = kzalloc(sizeof(struct smsdvb_client_t), GFP_KERNEL);
 381         if (!client) {
 382                 sms_err("kmalloc() failed");
 383                 return -ENOMEM;
 384         }
 385
 386         /* register dvb adapter */
 387         rc = dvb_register_adapter(&client->adapter,
 388                                   sms_get_board(
 389                                         smscore_get_board_id(coredev))->name,
 390                                   THIS_MODULE, device, adapter_nr);
 391         if (rc < 0) {
 392                 sms_err("dvb_register_adapter() failed %d", rc);
 393                 goto adapter_error;
 394         }
 395
 396         /* init dvb demux */
 397         client->demux.dmx.capabilities = DMX_TS_FILTERING;
 398         client->demux.filternum = 32; /* todo: nova ??? */
 399         client->demux.feednum = 32;
 400         client->demux.start_feed = smsdvb_start_feed;
 401         client->demux.stop_feed = smsdvb_stop_feed;
 402
 403         rc = dvb_dmx_init(&client->demux);
 404         if (rc < 0) {
 405                 sms_err("dvb_dmx_init failed %d", rc);
 406                 goto dvbdmx_error;
 407         }
 408
 409         /* init dmxdev */
 410         client->dmxdev.filternum = 32;
 411         client->dmxdev.demux = &client->demux.dmx;
 412         client->dmxdev.capabilities = 0;
 413
 414         rc = dvb_dmxdev_init(&client->dmxdev, &client->adapter);
 415         if (rc < 0) {
 416                 sms_err("dvb_dmxdev_init failed %d", rc);
 417                 goto dmxdev_error;
 418         }
 419
 420         /* init and register frontend */
 421         memcpy(&client->frontend.ops, &smsdvb_fe_ops,
 422                sizeof(struct dvb_frontend_ops));
 423
 424         rc = dvb_register_frontend(&client->adapter, &client->frontend);
 425         if (rc < 0) {
 426                 sms_err("frontend registration failed %d", rc);
 427                 goto frontend_error;
 428         }
 429
 430         params.initial_id = 1;
 431         params.data_type = MSG_SMS_DVBT_BDA_DATA;
 432         params.onresponse_handler = smsdvb_onresponse;
 433         params.onremove_handler = smsdvb_onremove;
 434         params.context = client;
 435
 436         rc = smscore_register_client(coredev, &params, &client->smsclient);
 437         if (rc < 0) {
 438                 sms_err("smscore_register_client() failed %d", rc);
 439                 goto client_error;
 440         }
 441
 442         client->coredev = coredev;
 443
 444         init_completion(&client->tune_done);
 445         init_completion(&client->stat_done);
 446
 447         kmutex_lock(&g_smsdvb_clientslock);
 448
 449         list_add(&client->entry, &g_smsdvb_clients);
 450
 451         kmutex_unlock(&g_smsdvb_clientslock);
 452
 453         sms_info("success");
 454
 455         sms_board_setup(coredev);
 456
 457         return 0;
 458
 459 client_error:
 460         dvb_unregister_frontend(&client->frontend);
 461
 462 frontend_error:
 463         dvb_dmxdev_release(&client->dmxdev);
 464
 465 dmxdev_error:
 466         dvb_dmx_release(&client->demux);
 467
 468 dvbdmx_error:
 469         dvb_unregister_adapter(&client->adapter);
 470
 471 adapter_error:
 472         kfree(client);
 473         return rc;
 474 }
 475
 476 int smsdvb_register(void)
 477 {
 478         int rc;
 479
 480         INIT_LIST_HEAD(&g_smsdvb_clients);
 481         kmutex_init(&g_smsdvb_clientslock);
 482
 483         rc = smscore_register_hotplug(smsdvb_hotplug);
 484
 485         sms_debug("");
 486
 487         return rc;
 488 }
 489
 490 void smsdvb_unregister(void)
 491 {
 492         smscore_unregister_hotplug(smsdvb_hotplug);
 493
 494         kmutex_lock(&g_smsdvb_clientslock);
 495
 496         while (!list_empty(&g_smsdvb_clients))
 497                smsdvb_unregister_client(
 498                         (struct smsdvb_client_t *) g_smsdvb_clients.next);
 499
 500         kmutex_unlock(&g_smsdvb_clientslock);
 501 }