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 3 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 list_head g_smsdvb_clients;
  31 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
  64                         if (p->Stat.InBandPwr < -95)
  65                                 client->fe_signal_strength = 0;
  66                         else if (p->Stat.InBandPwr > -29)
  67                                 client->fe_signal_strength = 100;
  68                         else
  69                                 client->fe_signal_strength =
  70                                         (p->Stat.InBandPwr + 95) * 3 / 2;
  71                 } else {
  72                         client->fe_status = 0;
  73                         client->fe_snr =
  74                         client->fe_ber =
  75                         client->fe_signal_strength = 0;
  76                 }
  77
  78                 complete(&client->stat_done);
  79                 break;
  80         } }
  81
  82         smscore_putbuffer(client->coredev, cb);
  83
  84         return 0;
  85 }
  86
  87 static void smsdvb_unregister_client(struct smsdvb_client_t *client)
  88 {
  89         /* must be called under clientslock */
  90
  91         list_del(&client->entry);
  92
  93         smscore_unregister_client(client->smsclient);
  94         dvb_unregister_frontend(&client->frontend);
  95         dvb_dmxdev_release(&client->dmxdev);
  96         dvb_dmx_release(&client->demux);
  97         dvb_unregister_adapter(&client->adapter);
  98         kfree(client);
  99 }
 100
 101 static void smsdvb_onremove(void *context)
 102 {
 103         kmutex_lock(&g_smsdvb_clientslock);
 104
 105         smsdvb_unregister_client((struct smsdvb_client_t *) context);
 106
 107         kmutex_unlock(&g_smsdvb_clientslock);
 108 }
 109
 110 static int smsdvb_start_feed(struct dvb_demux_feed *feed)
 111 {
 112         struct smsdvb_client_t *client =
 113                 container_of(feed->demux, struct smsdvb_client_t, demux);
 114         struct SmsMsgData_ST PidMsg;
 115
 116         sms_debug("add pid %d(%x)",
 117                   feed->pid, feed->pid);
 118
 119         PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
 120         PidMsg.xMsgHeader.msgDstId = HIF_TASK;
 121         PidMsg.xMsgHeader.msgFlags = 0;
 122         PidMsg.xMsgHeader.msgType  = MSG_SMS_ADD_PID_FILTER_REQ;
 123         PidMsg.xMsgHeader.msgLength = sizeof(PidMsg);
 124         PidMsg.msgData[0] = feed->pid;
 125
 126         return smsclient_sendrequest(client->smsclient,
 127                                      &PidMsg, sizeof(PidMsg));
 128 }
 129
 130 static int smsdvb_stop_feed(struct dvb_demux_feed *feed)
 131 {
 132         struct smsdvb_client_t *client =
 133                 container_of(feed->demux, struct smsdvb_client_t, demux);
 134         struct SmsMsgData_ST PidMsg;
 135
 136         sms_debug("remove pid %d(%x)",
 137                   feed->pid, feed->pid);
 138
 139         PidMsg.xMsgHeader.msgSrcId = DVBT_BDA_CONTROL_MSG_ID;
 140         PidMsg.xMsgHeader.msgDstId = HIF_TASK;
 141         PidMsg.xMsgHeader.msgFlags = 0;
 142         PidMsg.xMsgHeader.msgType  = MSG_SMS_REMOVE_PID_FILTER_REQ;
 143         PidMsg.xMsgHeader.msgLength = sizeof(PidMsg);
 144         PidMsg.msgData[0] = feed->pid;
 145
 146         return smsclient_sendrequest(client->smsclient,
 147                                      &PidMsg, sizeof(PidMsg));
 148 }
 149
 150 static int smsdvb_sendrequest_and_wait(struct smsdvb_client_t *client,
 151                                         void *buffer, size_t size,
 152                                         struct completion *completion)
 153 {
 154         int rc = smsclient_sendrequest(client->smsclient, buffer, size);
 155         if (rc < 0)
 156                 return rc;
 157
 158         return wait_for_completion_timeout(completion,
 159                                            msecs_to_jiffies(2000)) ?
 160                                                 0 : -ETIME;
 161 }
 162
 163 static int smsdvb_send_statistics_request(struct smsdvb_client_t *client)
 164 {
 165         struct SmsMsgHdr_ST Msg = { MSG_SMS_GET_STATISTICS_REQ,
 166                              DVBT_BDA_CONTROL_MSG_ID,
 167                              HIF_TASK, sizeof(struct SmsMsgHdr_ST), 0 };
 168         return smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 169                                            &client->stat_done);
 170 }
 171
 172 static int smsdvb_read_status(struct dvb_frontend *fe, fe_status_t *stat)
 173 {
 174         struct smsdvb_client_t *client =
 175                 container_of(fe, struct smsdvb_client_t, frontend);
 176         int rc = smsdvb_send_statistics_request(client);
 177
 178         if (!rc)
 179                 *stat = client->fe_status;
 180
 181         return rc;
 182 }
 183
 184 static int smsdvb_read_ber(struct dvb_frontend *fe, u32 *ber)
 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                 *ber = client->fe_ber;
 192
 193         return rc;
 194 }
 195
 196 static int smsdvb_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
 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                 *strength = client->fe_signal_strength;
 204
 205         return rc;
 206 }
 207
 208 static int smsdvb_read_snr(struct dvb_frontend *fe, u16 *snr)
 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                 *snr = client->fe_snr;
 216
 217         return rc;
 218 }
 219
 220 static int smsdvb_get_tune_settings(struct dvb_frontend *fe,
 221                                     struct dvb_frontend_tune_settings *tune)
 222 {
 223         sms_debug("");
 224
 225         tune->min_delay_ms = 400;
 226         tune->step_size = 250000;
 227         tune->max_drift = 0;
 228         return 0;
 229 }
 230
 231 static int smsdvb_set_frontend(struct dvb_frontend *fe,
 232                                struct dvb_frontend_parameters *fep)
 233 {
 234         struct smsdvb_client_t *client =
 235                 container_of(fe, struct smsdvb_client_t, frontend);
 236
 237         struct {
 238                 struct SmsMsgHdr_ST     Msg;
 239                 u32             Data[3];
 240         } Msg;
 241
 242         Msg.Msg.msgSrcId  = DVBT_BDA_CONTROL_MSG_ID;
 243         Msg.Msg.msgDstId  = HIF_TASK;
 244         Msg.Msg.msgFlags  = 0;
 245         Msg.Msg.msgType   = MSG_SMS_RF_TUNE_REQ;
 246         Msg.Msg.msgLength = sizeof(Msg);
 247         Msg.Data[0] = fep->frequency;
 248         Msg.Data[2] = 12000000;
 249
 250         sms_debug("freq %d band %d",
 251                   fep->frequency, fep->u.ofdm.bandwidth);
 252
 253         switch (fep->u.ofdm.bandwidth) {
 254         case BANDWIDTH_8_MHZ: Msg.Data[1] = BW_8_MHZ; break;
 255         case BANDWIDTH_7_MHZ: Msg.Data[1] = BW_7_MHZ; break;
 256         case BANDWIDTH_6_MHZ: Msg.Data[1] = BW_6_MHZ; break;
 257         case BANDWIDTH_AUTO: return -EOPNOTSUPP;
 258         default: return -EINVAL;
 259         }
 260
 261         return smsdvb_sendrequest_and_wait(client, &Msg, sizeof(Msg),
 262                                            &client->tune_done);
 263 }
 264
 265 static int smsdvb_get_frontend(struct dvb_frontend *fe,
 266                                struct dvb_frontend_parameters *fep)
 267 {
 268         struct smsdvb_client_t *client =
 269                 container_of(fe, struct smsdvb_client_t, frontend);
 270
 271         sms_debug("");
 272
 273         /* todo: */
 274         memcpy(fep, &client->fe_params,
 275                sizeof(struct dvb_frontend_parameters));
 276         return 0;
 277 }
 278
 279 static void smsdvb_release(struct dvb_frontend *fe)
 280 {
 281         /* do nothing */
 282 }
 283
 284 static struct dvb_frontend_ops smsdvb_fe_ops = {
 285         .info = {
 286                 .name                   = "Siano Mobile Digital SMS1xxx",
 287                 .type                   = FE_OFDM,
 288                 .frequency_min          = 44250000,
 289                 .frequency_max          = 867250000,
 290                 .frequency_stepsize     = 250000,
 291                 .caps = FE_CAN_INVERSION_AUTO |
 292                         FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
 293                         FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
 294                         FE_CAN_QPSK | FE_CAN_QAM_16 | FE_CAN_QAM_64 |
 295                         FE_CAN_QAM_AUTO | FE_CAN_TRANSMISSION_MODE_AUTO |
 296                         FE_CAN_GUARD_INTERVAL_AUTO |
 297                         FE_CAN_RECOVER |
 298                         FE_CAN_HIERARCHY_AUTO,
 299         },
 300
 301         .release = smsdvb_release,
 302
 303         .set_frontend = smsdvb_set_frontend,
 304         .get_frontend = smsdvb_get_frontend,
 305         .get_tune_settings = smsdvb_get_tune_settings,
 306
 307         .read_status = smsdvb_read_status,
 308         .read_ber = smsdvb_read_ber,
 309         .read_signal_strength = smsdvb_read_signal_strength,
 310         .read_snr = smsdvb_read_snr,
 311 };
 312
 313 static int smsdvb_hotplug(struct smscore_device_t *coredev,
 314                           struct device *device, int arrival)
 315 {
 316         struct smsclient_params_t params;
 317         struct smsdvb_client_t *client;
 318         int rc;
 319
 320         /* device removal handled by onremove callback */
 321         if (!arrival)
 322                 return 0;
 323
 324         if (smscore_get_device_mode(coredev) != 4) {
 325                 sms_err("SMS Device mode is not set for "
 326                         "DVB operation.");
 327                 return 0;
 328         }
 329
 330         client = kzalloc(sizeof(struct smsdvb_client_t), GFP_KERNEL);
 331         if (!client) {
 332                 sms_err("kmalloc() failed");
 333                 return -ENOMEM;
 334         }
 335
 336         /* register dvb adapter */
 337         rc = dvb_register_adapter(&client->adapter,
 338                                   sms_get_board(
 339                                         smscore_get_board_id(coredev))->name,
 340                                   THIS_MODULE, device, adapter_nr);
 341         if (rc < 0) {
 342                 sms_err("dvb_register_adapter() failed %d", rc);
 343                 goto adapter_error;
 344         }
 345
 346         /* init dvb demux */
 347         client->demux.dmx.capabilities = DMX_TS_FILTERING;
 348         client->demux.filternum = 32; /* todo: nova ??? */
 349         client->demux.feednum = 32;
 350         client->demux.start_feed = smsdvb_start_feed;
 351         client->demux.stop_feed = smsdvb_stop_feed;
 352
 353         rc = dvb_dmx_init(&client->demux);
 354         if (rc < 0) {
 355                 sms_err("dvb_dmx_init failed %d", rc);
 356                 goto dvbdmx_error;
 357         }
 358
 359         /* init dmxdev */
 360         client->dmxdev.filternum = 32;
 361         client->dmxdev.demux = &client->demux.dmx;
 362         client->dmxdev.capabilities = 0;
 363
 364         rc = dvb_dmxdev_init(&client->dmxdev, &client->adapter);
 365         if (rc < 0) {
 366                 sms_err("dvb_dmxdev_init failed %d", rc);
 367                 goto dmxdev_error;
 368         }
 369
 370         /* init and register frontend */
 371         memcpy(&client->frontend.ops, &smsdvb_fe_ops,
 372                sizeof(struct dvb_frontend_ops));
 373
 374         rc = dvb_register_frontend(&client->adapter, &client->frontend);
 375         if (rc < 0) {
 376                 sms_err("frontend registration failed %d", rc);
 377                 goto frontend_error;
 378         }
 379
 380         params.initial_id = 1;
 381         params.data_type = MSG_SMS_DVBT_BDA_DATA;
 382         params.onresponse_handler = smsdvb_onresponse;
 383         params.onremove_handler = smsdvb_onremove;
 384         params.context = client;
 385
 386         rc = smscore_register_client(coredev, &params, &client->smsclient);
 387         if (rc < 0) {
 388                 sms_err("smscore_register_client() failed %d", rc);
 389                 goto client_error;
 390         }
 391
 392         client->coredev = coredev;
 393
 394         init_completion(&client->tune_done);
 395         init_completion(&client->stat_done);
 396
 397         kmutex_lock(&g_smsdvb_clientslock);
 398
 399         list_add(&client->entry, &g_smsdvb_clients);
 400
 401         kmutex_unlock(&g_smsdvb_clientslock);
 402
 403         sms_info("success");
 404
 405         return 0;
 406
 407 client_error:
 408         dvb_unregister_frontend(&client->frontend);
 409
 410 frontend_error:
 411         dvb_dmxdev_release(&client->dmxdev);
 412
 413 dmxdev_error:
 414         dvb_dmx_release(&client->demux);
 415
 416 dvbdmx_error:
 417         dvb_unregister_adapter(&client->adapter);
 418
 419 adapter_error:
 420         kfree(client);
 421         return rc;
 422 }
 423
 424 int smsdvb_register(void)
 425 {
 426         int rc;
 427
 428         INIT_LIST_HEAD(&g_smsdvb_clients);
 429         kmutex_init(&g_smsdvb_clientslock);
 430
 431         rc = smscore_register_hotplug(smsdvb_hotplug);
 432
 433         sms_debug("");
 434
 435         return rc;
 436 }
 437
 438 void smsdvb_unregister(void)
 439 {
 440         smscore_unregister_hotplug(smsdvb_hotplug);
 441
 442         kmutex_lock(&g_smsdvb_clientslock);
 443
 444         while (!list_empty(&g_smsdvb_clients))
 445                smsdvb_unregister_client(
 446                         (struct smsdvb_client_t *) g_smsdvb_clients.next);
 447
 448         kmutex_unlock(&g_smsdvb_clientslock);
 449 }