drivers/media/pci/cx18/cx18-dvb.c

   1 /*
   2  *  cx18 functions for DVB support
   3  *
   4  *  Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
   5  *  Copyright (C) 2008  Andy Walls <awalls@md.metrocast.net>
   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  *
  16  *  GNU General Public License for more details.
  17  */
  18
  19 #include "cx18-version.h"
  20 #include "cx18-dvb.h"
  21 #include "cx18-io.h"
  22 #include "cx18-queue.h"
  23 #include "cx18-streams.h"
  24 #include "cx18-cards.h"
  25 #include "cx18-gpio.h"
  26 #include "s5h1409.h"
  27 #include "mxl5005s.h"
  28 #include "s5h1411.h"
  29 #include "tda18271.h"
  30 #include "zl10353.h"
  31
  32 #include <linux/firmware.h>
  33 #include "mt352.h"
  34 #include "mt352_priv.h"
  35 #include "tuner-xc2028.h"
  36
  37 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  38
  39 #define FWFILE "dvb-cx18-mpc718-mt352.fw"
  40
  41 #define CX18_REG_DMUX_NUM_PORT_0_CONTROL 0xd5a000
  42 #define CX18_CLOCK_ENABLE2               0xc71024
  43 #define CX18_DMUX_CLK_MASK               0x0080
  44
  45 /*
  46  * CX18_CARD_HVR_1600_ESMT
  47  * CX18_CARD_HVR_1600_SAMSUNG
  48  */
  49
  50 static struct mxl5005s_config hauppauge_hvr1600_tuner = {
  51         .i2c_address     = 0xC6 >> 1,
  52         .if_freq         = IF_FREQ_5380000HZ,
  53         .xtal_freq       = CRYSTAL_FREQ_16000000HZ,
  54         .agc_mode        = MXL_SINGLE_AGC,
  55         .tracking_filter = MXL_TF_C_H,
  56         .rssi_enable     = MXL_RSSI_ENABLE,
  57         .cap_select      = MXL_CAP_SEL_ENABLE,
  58         .div_out         = MXL_DIV_OUT_4,
  59         .clock_out       = MXL_CLOCK_OUT_DISABLE,
  60         .output_load     = MXL5005S_IF_OUTPUT_LOAD_200_OHM,
  61         .top             = MXL5005S_TOP_25P2,
  62         .mod_mode        = MXL_DIGITAL_MODE,
  63         .if_mode         = MXL_ZERO_IF,
  64         .qam_gain        = 0x02,
  65         .AgcMasterByte   = 0x00,
  66 };
  67
  68 static struct s5h1409_config hauppauge_hvr1600_config = {
  69         .demod_address = 0x32 >> 1,
  70         .output_mode   = S5H1409_SERIAL_OUTPUT,
  71         .gpio          = S5H1409_GPIO_ON,
  72         .qam_if        = 44000,
  73         .inversion     = S5H1409_INVERSION_OFF,
  74         .status_mode   = S5H1409_DEMODLOCKING,
  75         .mpeg_timing   = S5H1409_MPEGTIMING_CONTINUOUS_NONINVERTING_CLOCK,
  76         .hvr1600_opt   = S5H1409_HVR1600_OPTIMIZE
  77 };
  78
  79 /*
  80  * CX18_CARD_HVR_1600_S5H1411
  81  */
  82 static struct s5h1411_config hcw_s5h1411_config = {
  83         .output_mode   = S5H1411_SERIAL_OUTPUT,
  84         .gpio          = S5H1411_GPIO_OFF,
  85         .vsb_if        = S5H1411_IF_44000,
  86         .qam_if        = S5H1411_IF_4000,
  87         .inversion     = S5H1411_INVERSION_ON,
  88         .status_mode   = S5H1411_DEMODLOCKING,
  89         .mpeg_timing   = S5H1411_MPEGTIMING_CONTINUOUS_NONINVERTING_CLOCK,
  90 };
  91
  92 static struct tda18271_std_map hauppauge_tda18271_std_map = {
  93         .atsc_6   = { .if_freq = 5380, .agc_mode = 3, .std = 3,
  94                       .if_lvl = 6, .rfagc_top = 0x37 },
  95         .qam_6    = { .if_freq = 4000, .agc_mode = 3, .std = 0,
  96                       .if_lvl = 6, .rfagc_top = 0x37 },
  97 };
  98
  99 static struct tda18271_config hauppauge_tda18271_config = {
 100         .std_map = &hauppauge_tda18271_std_map,
 101         .gate    = TDA18271_GATE_DIGITAL,
 102         .output_opt = TDA18271_OUTPUT_LT_OFF,
 103 };
 104
 105 /*
 106  * CX18_CARD_LEADTEK_DVR3100H
 107  */
 108 /* Information/confirmation of proper config values provided by Terry Wu */
 109 static struct zl10353_config leadtek_dvr3100h_demod = {
 110         .demod_address         = 0x1e >> 1, /* Datasheet suggested straps */
 111         .if2                   = 45600,     /* 4.560 MHz IF from the XC3028 */
 112         .parallel_ts           = 1,         /* Not a serial TS */
 113         .no_tuner              = 1,         /* XC3028 is not behind the gate */
 114         .disable_i2c_gate_ctrl = 1,         /* Disable the I2C gate */
 115 };
 116
 117 /*
 118  * CX18_CARD_YUAN_MPC718
 119  */
 120 /*
 121  * Due to
 122  *
 123  * 1. an absence of information on how to prgram the MT352
 124  * 2. the Linux mt352 module pushing MT352 initialzation off onto us here
 125  *
 126  * We have to use an init sequence that *you* must extract from the Windows
 127  * driver (yuanrap.sys) and which we load as a firmware.
 128  *
 129  * If someone can provide me with a Zarlink MT352 (Intel CE6352?) Design Manual
 130  * with chip programming details, then I can remove this annoyance.
 131  */
 132 static int yuan_mpc718_mt352_reqfw(struct cx18_stream *stream,
 133                                    const struct firmware **fw)
 134 {
 135         struct cx18 *cx = stream->cx;
 136         const char *fn = FWFILE;
 137         int ret;
 138
 139         ret = request_firmware(fw, fn, &cx->pci_dev->dev);
 140         if (ret)
 141                 CX18_ERR("Unable to open firmware file %s\n", fn);
 142         else {
 143                 size_t sz = (*fw)->size;
 144                 if (sz < 2 || sz > 64 || (sz % 2) != 0) {
 145                         CX18_ERR("Firmware %s has a bad size: %lu bytes\n",
 146                                  fn, (unsigned long) sz);
 147                         ret = -EILSEQ;
 148                         release_firmware(*fw);
 149                         *fw = NULL;
 150                 }
 151         }
 152
 153         if (ret) {
 154                 CX18_ERR("The MPC718 board variant with the MT352 DVB-T demodulator will not work without it\n");
 155                 CX18_ERR("Run 'linux/scripts/get_dvb_firmware mpc718' if you need the firmware\n");
 156         }
 157         return ret;
 158 }
 159
 160 static int yuan_mpc718_mt352_init(struct dvb_frontend *fe)
 161 {
 162         struct cx18_dvb *dvb = container_of(fe->dvb,
 163                                             struct cx18_dvb, dvb_adapter);
 164         struct cx18_stream *stream = dvb->stream;
 165         const struct firmware *fw = NULL;
 166         int ret;
 167         int i;
 168         u8 buf[3];
 169
 170         ret = yuan_mpc718_mt352_reqfw(stream, &fw);
 171         if (ret)
 172                 return ret;
 173
 174         /* Loop through all the register-value pairs in the firmware file */
 175         for (i = 0; i < fw->size; i += 2) {
 176                 buf[0] = fw->data[i];
 177                 /* Intercept a few registers we want to set ourselves */
 178                 switch (buf[0]) {
 179                 case TRL_NOMINAL_RATE_0:
 180                         /* Set our custom OFDM bandwidth in the case below */
 181                         break;
 182                 case TRL_NOMINAL_RATE_1:
 183                         /* 6 MHz: 64/7 * 6/8 / 20.48 * 2^16 = 0x55b6.db6 */
 184                         /* 7 MHz: 64/7 * 7/8 / 20.48 * 2^16 = 0x6400 */
 185                         /* 8 MHz: 64/7 * 8/8 / 20.48 * 2^16 = 0x7249.249 */
 186                         buf[1] = 0x72;
 187                         buf[2] = 0x49;
 188                         mt352_write(fe, buf, 3);
 189                         break;
 190                 case INPUT_FREQ_0:
 191                         /* Set our custom IF in the case below */
 192                         break;
 193                 case INPUT_FREQ_1:
 194                         /* 4.56 MHz IF: (20.48 - 4.56)/20.48 * 2^14 = 0x31c0 */
 195                         buf[1] = 0x31;
 196                         buf[2] = 0xc0;
 197                         mt352_write(fe, buf, 3);
 198                         break;
 199                 default:
 200                         /* Pass through the register-value pair from the fw */
 201                         buf[1] = fw->data[i+1];
 202                         mt352_write(fe, buf, 2);
 203                         break;
 204                 }
 205         }
 206
 207         buf[0] = (u8) TUNER_GO;
 208         buf[1] = 0x01; /* Go */
 209         mt352_write(fe, buf, 2);
 210         release_firmware(fw);
 211         return 0;
 212 }
 213
 214 static struct mt352_config yuan_mpc718_mt352_demod = {
 215         .demod_address = 0x1e >> 1,
 216         .adc_clock     = 20480,     /* 20.480 MHz */
 217         .if2           =  4560,     /*  4.560 MHz */
 218         .no_tuner      = 1,         /* XC3028 is not behind the gate */
 219         .demod_init    = yuan_mpc718_mt352_init,
 220 };
 221
 222 static struct zl10353_config yuan_mpc718_zl10353_demod = {
 223         .demod_address         = 0x1e >> 1, /* Datasheet suggested straps */
 224         .if2                   = 45600,     /* 4.560 MHz IF from the XC3028 */
 225         .parallel_ts           = 1,         /* Not a serial TS */
 226         .no_tuner              = 1,         /* XC3028 is not behind the gate */
 227         .disable_i2c_gate_ctrl = 1,         /* Disable the I2C gate */
 228 };
 229
 230 static struct zl10353_config gotview_dvd3_zl10353_demod = {
 231         .demod_address         = 0x1e >> 1, /* Datasheet suggested straps */
 232         .if2                   = 45600,     /* 4.560 MHz IF from the XC3028 */
 233         .parallel_ts           = 1,         /* Not a serial TS */
 234         .no_tuner              = 1,         /* XC3028 is not behind the gate */
 235         .disable_i2c_gate_ctrl = 1,         /* Disable the I2C gate */
 236 };
 237
 238 static int dvb_register(struct cx18_stream *stream);
 239
 240 /* Kernel DVB framework calls this when the feed needs to start.
 241  * The CX18 framework should enable the transport DMA handling
 242  * and queue processing.
 243  */
 244 static int cx18_dvb_start_feed(struct dvb_demux_feed *feed)
 245 {
 246         struct dvb_demux *demux = feed->demux;
 247         struct cx18_stream *stream = (struct cx18_stream *) demux->priv;
 248         struct cx18 *cx;
 249         int ret;
 250         u32 v;
 251
 252         if (!stream)
 253                 return -EINVAL;
 254
 255         cx = stream->cx;
 256         CX18_DEBUG_INFO("Start feed: pid = 0x%x index = %d\n",
 257                         feed->pid, feed->index);
 258
 259         mutex_lock(&cx->serialize_lock);
 260         ret = cx18_init_on_first_open(cx);
 261         mutex_unlock(&cx->serialize_lock);
 262         if (ret) {
 263                 CX18_ERR("Failed to initialize firmware starting DVB feed\n");
 264                 return ret;
 265         }
 266         ret = -EINVAL;
 267
 268         switch (cx->card->type) {
 269         case CX18_CARD_HVR_1600_ESMT:
 270         case CX18_CARD_HVR_1600_SAMSUNG:
 271         case CX18_CARD_HVR_1600_S5H1411:
 272                 v = cx18_read_reg(cx, CX18_REG_DMUX_NUM_PORT_0_CONTROL);
 273                 v |= 0x00400000; /* Serial Mode */
 274                 v |= 0x00002000; /* Data Length - Byte */
 275                 v |= 0x00010000; /* Error - Polarity */
 276                 v |= 0x00020000; /* Error - Passthru */
 277                 v |= 0x000c0000; /* Error - Ignore */
 278                 cx18_write_reg(cx, v, CX18_REG_DMUX_NUM_PORT_0_CONTROL);
 279                 break;
 280
 281         case CX18_CARD_LEADTEK_DVR3100H:
 282         case CX18_CARD_YUAN_MPC718:
 283         case CX18_CARD_GOTVIEW_PCI_DVD3:
 284         default:
 285                 /* Assumption - Parallel transport - Signalling
 286                  * undefined or default.
 287                  */
 288                 break;
 289         }
 290
 291         if (!demux->dmx.frontend)
 292                 return -EINVAL;
 293
 294         mutex_lock(&stream->dvb->feedlock);
 295         if (stream->dvb->feeding++ == 0) {
 296                 CX18_DEBUG_INFO("Starting Transport DMA\n");
 297                 mutex_lock(&cx->serialize_lock);
 298                 set_bit(CX18_F_S_STREAMING, &stream->s_flags);
 299                 ret = cx18_start_v4l2_encode_stream(stream);
 300                 if (ret < 0) {
 301                         CX18_DEBUG_INFO("Failed to start Transport DMA\n");
 302                         stream->dvb->feeding--;
 303                         if (stream->dvb->feeding == 0)
 304                                 clear_bit(CX18_F_S_STREAMING, &stream->s_flags);
 305                 }
 306                 mutex_unlock(&cx->serialize_lock);
 307         } else
 308                 ret = 0;
 309         mutex_unlock(&stream->dvb->feedlock);
 310
 311         return ret;
 312 }
 313
 314 /* Kernel DVB framework calls this when the feed needs to stop. */
 315 static int cx18_dvb_stop_feed(struct dvb_demux_feed *feed)
 316 {
 317         struct dvb_demux *demux = feed->demux;
 318         struct cx18_stream *stream = (struct cx18_stream *)demux->priv;
 319         struct cx18 *cx;
 320         int ret = -EINVAL;
 321
 322         if (stream) {
 323                 cx = stream->cx;
 324                 CX18_DEBUG_INFO("Stop feed: pid = 0x%x index = %d\n",
 325                                 feed->pid, feed->index);
 326
 327                 mutex_lock(&stream->dvb->feedlock);
 328                 if (--stream->dvb->feeding == 0) {
 329                         CX18_DEBUG_INFO("Stopping Transport DMA\n");
 330                         mutex_lock(&cx->serialize_lock);
 331                         ret = cx18_stop_v4l2_encode_stream(stream, 0);
 332                         mutex_unlock(&cx->serialize_lock);
 333                 } else
 334                         ret = 0;
 335                 mutex_unlock(&stream->dvb->feedlock);
 336         }
 337
 338         return ret;
 339 }
 340
 341 int cx18_dvb_register(struct cx18_stream *stream)
 342 {
 343         struct cx18 *cx = stream->cx;
 344         struct cx18_dvb *dvb = stream->dvb;
 345         struct dvb_adapter *dvb_adapter;
 346         struct dvb_demux *dvbdemux;
 347         struct dmx_demux *dmx;
 348         int ret;
 349
 350         if (!dvb)
 351                 return -EINVAL;
 352
 353         dvb->enabled = 0;
 354         dvb->stream = stream;
 355
 356         ret = dvb_register_adapter(&dvb->dvb_adapter,
 357                         CX18_DRIVER_NAME,
 358                         THIS_MODULE, &cx->pci_dev->dev, adapter_nr);
 359         if (ret < 0)
 360                 goto err_out;
 361
 362         dvb_adapter = &dvb->dvb_adapter;
 363
 364         dvbdemux = &dvb->demux;
 365
 366         dvbdemux->priv = (void *)stream;
 367
 368         dvbdemux->filternum = 256;
 369         dvbdemux->feednum = 256;
 370         dvbdemux->start_feed = cx18_dvb_start_feed;
 371         dvbdemux->stop_feed = cx18_dvb_stop_feed;
 372         dvbdemux->dmx.capabilities = (DMX_TS_FILTERING |
 373                 DMX_SECTION_FILTERING | DMX_MEMORY_BASED_FILTERING);
 374         ret = dvb_dmx_init(dvbdemux);
 375         if (ret < 0)
 376                 goto err_dvb_unregister_adapter;
 377
 378         dmx = &dvbdemux->dmx;
 379
 380         dvb->hw_frontend.source = DMX_FRONTEND_0;
 381         dvb->mem_frontend.source = DMX_MEMORY_FE;
 382         dvb->dmxdev.filternum = 256;
 383         dvb->dmxdev.demux = dmx;
 384
 385         ret = dvb_dmxdev_init(&dvb->dmxdev, dvb_adapter);
 386         if (ret < 0)
 387                 goto err_dvb_dmx_release;
 388
 389         ret = dmx->add_frontend(dmx, &dvb->hw_frontend);
 390         if (ret < 0)
 391                 goto err_dvb_dmxdev_release;
 392
 393         ret = dmx->add_frontend(dmx, &dvb->mem_frontend);
 394         if (ret < 0)
 395                 goto err_remove_hw_frontend;
 396
 397         ret = dmx->connect_frontend(dmx, &dvb->hw_frontend);
 398         if (ret < 0)
 399                 goto err_remove_mem_frontend;
 400
 401         ret = dvb_register(stream);
 402         if (ret < 0)
 403                 goto err_disconnect_frontend;
 404
 405         dvb_net_init(dvb_adapter, &dvb->dvbnet, dmx);
 406
 407         CX18_INFO("DVB Frontend registered\n");
 408         CX18_INFO("Registered DVB adapter%d for %s (%d x %d.%02d kB)\n",
 409                   stream->dvb->dvb_adapter.num, stream->name,
 410                   stream->buffers, stream->buf_size/1024,
 411                   (stream->buf_size * 100 / 1024) % 100);
 412
 413         mutex_init(&dvb->feedlock);
 414         dvb->enabled = 1;
 415         return ret;
 416
 417 err_disconnect_frontend:
 418         dmx->disconnect_frontend(dmx);
 419 err_remove_mem_frontend:
 420         dmx->remove_frontend(dmx, &dvb->mem_frontend);
 421 err_remove_hw_frontend:
 422         dmx->remove_frontend(dmx, &dvb->hw_frontend);
 423 err_dvb_dmxdev_release:
 424         dvb_dmxdev_release(&dvb->dmxdev);
 425 err_dvb_dmx_release:
 426         dvb_dmx_release(dvbdemux);
 427 err_dvb_unregister_adapter:
 428         dvb_unregister_adapter(dvb_adapter);
 429 err_out:
 430         return ret;
 431 }
 432
 433 void cx18_dvb_unregister(struct cx18_stream *stream)
 434 {
 435         struct cx18 *cx = stream->cx;
 436         struct cx18_dvb *dvb = stream->dvb;
 437         struct dvb_adapter *dvb_adapter;
 438         struct dvb_demux *dvbdemux;
 439         struct dmx_demux *dmx;
 440
 441         CX18_INFO("unregister DVB\n");
 442
 443         if (dvb == NULL || !dvb->enabled)
 444                 return;
 445
 446         dvb_adapter = &dvb->dvb_adapter;
 447         dvbdemux = &dvb->demux;
 448         dmx = &dvbdemux->dmx;
 449
 450         dmx->close(dmx);
 451         dvb_net_release(&dvb->dvbnet);
 452         dmx->remove_frontend(dmx, &dvb->mem_frontend);
 453         dmx->remove_frontend(dmx, &dvb->hw_frontend);
 454         dvb_dmxdev_release(&dvb->dmxdev);
 455         dvb_dmx_release(dvbdemux);
 456         dvb_unregister_frontend(dvb->fe);
 457         dvb_frontend_detach(dvb->fe);
 458         dvb_unregister_adapter(dvb_adapter);
 459 }
 460
 461 /* All the DVB attach calls go here, this function get's modified
 462  * for each new card. cx18_dvb_start_feed() will also need changes.
 463  */
 464 static int dvb_register(struct cx18_stream *stream)
 465 {
 466         struct cx18_dvb *dvb = stream->dvb;
 467         struct cx18 *cx = stream->cx;
 468         int ret = 0;
 469
 470         switch (cx->card->type) {
 471         case CX18_CARD_HVR_1600_ESMT:
 472         case CX18_CARD_HVR_1600_SAMSUNG:
 473                 dvb->fe = dvb_attach(s5h1409_attach,
 474                         &hauppauge_hvr1600_config,
 475                         &cx->i2c_adap[0]);
 476                 if (dvb->fe != NULL) {
 477                         dvb_attach(mxl5005s_attach, dvb->fe,
 478                                 &cx->i2c_adap[0],
 479                                 &hauppauge_hvr1600_tuner);
 480                         ret = 0;
 481                 }
 482                 break;
 483         case CX18_CARD_HVR_1600_S5H1411:
 484                 dvb->fe = dvb_attach(s5h1411_attach,
 485                                      &hcw_s5h1411_config,
 486                                      &cx->i2c_adap[0]);
 487                 if (dvb->fe != NULL)
 488                         dvb_attach(tda18271_attach, dvb->fe,
 489                                    0x60, &cx->i2c_adap[0],
 490                                    &hauppauge_tda18271_config);
 491                 break;
 492         case CX18_CARD_LEADTEK_DVR3100H:
 493                 dvb->fe = dvb_attach(zl10353_attach,
 494                                      &leadtek_dvr3100h_demod,
 495                                      &cx->i2c_adap[1]);
 496                 if (dvb->fe != NULL) {
 497                         struct dvb_frontend *fe;
 498                         struct xc2028_config cfg = {
 499                                 .i2c_adap = &cx->i2c_adap[1],
 500                                 .i2c_addr = 0xc2 >> 1,
 501                                 .ctrl = NULL,
 502                         };
 503                         static struct xc2028_ctrl ctrl = {
 504                                 .fname   = XC2028_DEFAULT_FIRMWARE,
 505                                 .max_len = 64,
 506                                 .demod   = XC3028_FE_ZARLINK456,
 507                                 .type    = XC2028_AUTO,
 508                         };
 509
 510                         fe = dvb_attach(xc2028_attach, dvb->fe, &cfg);
 511                         if (fe != NULL && fe->ops.tuner_ops.set_config != NULL)
 512                                 fe->ops.tuner_ops.set_config(fe, &ctrl);
 513                 }
 514                 break;
 515         case CX18_CARD_YUAN_MPC718:
 516                 /*
 517                  * TODO
 518                  * Apparently, these cards also could instead have a
 519                  * DiBcom demod supported by one of the db7000 drivers
 520                  */
 521                 dvb->fe = dvb_attach(mt352_attach,
 522                                      &yuan_mpc718_mt352_demod,
 523                                      &cx->i2c_adap[1]);
 524                 if (dvb->fe == NULL)
 525                         dvb->fe = dvb_attach(zl10353_attach,
 526                                              &yuan_mpc718_zl10353_demod,
 527                                              &cx->i2c_adap[1]);
 528                 if (dvb->fe != NULL) {
 529                         struct dvb_frontend *fe;
 530                         struct xc2028_config cfg = {
 531                                 .i2c_adap = &cx->i2c_adap[1],
 532                                 .i2c_addr = 0xc2 >> 1,
 533                                 .ctrl = NULL,
 534                         };
 535                         static struct xc2028_ctrl ctrl = {
 536                                 .fname   = XC2028_DEFAULT_FIRMWARE,
 537                                 .max_len = 64,
 538                                 .demod   = XC3028_FE_ZARLINK456,
 539                                 .type    = XC2028_AUTO,
 540                         };
 541
 542                         fe = dvb_attach(xc2028_attach, dvb->fe, &cfg);
 543                         if (fe != NULL && fe->ops.tuner_ops.set_config != NULL)
 544                                 fe->ops.tuner_ops.set_config(fe, &ctrl);
 545                 }
 546                 break;
 547         case CX18_CARD_GOTVIEW_PCI_DVD3:
 548                         dvb->fe = dvb_attach(zl10353_attach,
 549                                              &gotview_dvd3_zl10353_demod,
 550                                              &cx->i2c_adap[1]);
 551                 if (dvb->fe != NULL) {
 552                         struct dvb_frontend *fe;
 553                         struct xc2028_config cfg = {
 554                                 .i2c_adap = &cx->i2c_adap[1],
 555                                 .i2c_addr = 0xc2 >> 1,
 556                                 .ctrl = NULL,
 557                         };
 558                         static struct xc2028_ctrl ctrl = {
 559                                 .fname   = XC2028_DEFAULT_FIRMWARE,
 560                                 .max_len = 64,
 561                                 .demod   = XC3028_FE_ZARLINK456,
 562                                 .type    = XC2028_AUTO,
 563                         };
 564
 565                         fe = dvb_attach(xc2028_attach, dvb->fe, &cfg);
 566                         if (fe != NULL && fe->ops.tuner_ops.set_config != NULL)
 567                                 fe->ops.tuner_ops.set_config(fe, &ctrl);
 568                 }
 569                 break;
 570         default:
 571                 /* No Digital Tv Support */
 572                 break;
 573         }
 574
 575         if (dvb->fe == NULL) {
 576                 CX18_ERR("frontend initialization failed\n");
 577                 return -1;
 578         }
 579
 580         dvb->fe->callback = cx18_reset_tuner_gpio;
 581
 582         ret = dvb_register_frontend(&dvb->dvb_adapter, dvb->fe);
 583         if (ret < 0) {
 584                 if (dvb->fe->ops.release)
 585                         dvb->fe->ops.release(dvb->fe);
 586                 return ret;
 587         }
 588
 589         /*
 590          * The firmware seems to enable the TS DMUX clock
 591          * under various circumstances.  However, since we know we
 592          * might use it, let's just turn it on ourselves here.
 593          */
 594         cx18_write_reg_expect(cx,
 595                               (CX18_DMUX_CLK_MASK << 16) | CX18_DMUX_CLK_MASK,
 596                               CX18_CLOCK_ENABLE2,
 597                               CX18_DMUX_CLK_MASK,
 598                               (CX18_DMUX_CLK_MASK << 16) | CX18_DMUX_CLK_MASK);
 599
 600         return ret;
 601 }
 602
 603 MODULE_FIRMWARE(FWFILE);