drivers/media/video/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  *  You should have received a copy of the GNU General Public License
  19  *  along with this program; if not, write to the Free Software
  20  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  */
  22
  23 #include "cx18-version.h"
  24 #include "cx18-dvb.h"
  25 #include "cx18-io.h"
  26 #include "cx18-queue.h"
  27 #include "cx18-streams.h"
  28 #include "cx18-cards.h"
  29 #include "cx18-gpio.h"
  30 #include "s5h1409.h"
  31 #include "mxl5005s.h"
  32 #include "s5h1411.h"
  33 #include "tda18271.h"
  34 #include "zl10353.h"
  35
  36 #include <linux/firmware.h>
  37 #include "mt352.h"
  38 #include "mt352_priv.h"
  39 #include "tuner-xc2028.h"
  40
  41 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  42
  43 #define CX18_REG_DMUX_NUM_PORT_0_CONTROL 0xd5a000
  44 #define CX18_CLOCK_ENABLE2               0xc71024
  45 #define CX18_DMUX_CLK_MASK               0x0080
  46
  47 /*
  48  * CX18_CARD_HVR_1600_ESMT
  49  * CX18_CARD_HVR_1600_SAMSUNG
  50  */
  51
  52 static struct mxl5005s_config hauppauge_hvr1600_tuner = {
  53         .i2c_address     = 0xC6 >> 1,
  54         .if_freq         = IF_FREQ_5380000HZ,
  55         .xtal_freq       = CRYSTAL_FREQ_16000000HZ,
  56         .agc_mode        = MXL_SINGLE_AGC,
  57         .tracking_filter = MXL_TF_C_H,
  58         .rssi_enable     = MXL_RSSI_ENABLE,
  59         .cap_select      = MXL_CAP_SEL_ENABLE,
  60         .div_out         = MXL_DIV_OUT_4,
  61         .clock_out       = MXL_CLOCK_OUT_DISABLE,
  62         .output_load     = MXL5005S_IF_OUTPUT_LOAD_200_OHM,
  63         .top             = MXL5005S_TOP_25P2,
  64         .mod_mode        = MXL_DIGITAL_MODE,
  65         .if_mode         = MXL_ZERO_IF,
  66         .qam_gain        = 0x02,
  67         .AgcMasterByte   = 0x00,
  68 };
  69
  70 static struct s5h1409_config hauppauge_hvr1600_config = {
  71         .demod_address = 0x32 >> 1,
  72         .output_mode   = S5H1409_SERIAL_OUTPUT,
  73         .gpio          = S5H1409_GPIO_ON,
  74         .qam_if        = 44000,
  75         .inversion     = S5H1409_INVERSION_OFF,
  76         .status_mode   = S5H1409_DEMODLOCKING,
  77         .mpeg_timing   = S5H1409_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK,
  78         .hvr1600_opt   = S5H1409_HVR1600_OPTIMIZE
  79 };
  80
  81 /*
  82  * CX18_CARD_HVR_1600_S5H1411
  83  */
  84 static struct s5h1411_config hcw_s5h1411_config = {
  85         .output_mode   = S5H1411_SERIAL_OUTPUT,
  86         .gpio          = S5H1411_GPIO_OFF,
  87         .vsb_if        = S5H1411_IF_44000,
  88         .qam_if        = S5H1411_IF_4000,
  89         .inversion     = S5H1411_INVERSION_ON,
  90         .status_mode   = S5H1411_DEMODLOCKING,
  91         .mpeg_timing   = S5H1411_MPEGTIMING_CONTINOUS_NONINVERTING_CLOCK,
  92 };
  93
  94 static struct tda18271_std_map hauppauge_tda18271_std_map = {
  95         .atsc_6   = { .if_freq = 5380, .agc_mode = 3, .std = 3,
  96                       .if_lvl = 6, .rfagc_top = 0x37 },
  97         .qam_6    = { .if_freq = 4000, .agc_mode = 3, .std = 0,
  98                       .if_lvl = 6, .rfagc_top = 0x37 },
  99 };
 100
 101 static struct tda18271_config hauppauge_tda18271_config = {
 102         .std_map = &hauppauge_tda18271_std_map,
 103         .gate    = TDA18271_GATE_DIGITAL,
 104         .output_opt = TDA18271_OUTPUT_LT_OFF,
 105 };
 106
 107 /*
 108  * CX18_CARD_LEADTEK_DVR3100H
 109  */
 110 /* Information/confirmation of proper config values provided by Terry Wu */
 111 static struct zl10353_config leadtek_dvr3100h_demod = {
 112         .demod_address         = 0x1e >> 1, /* Datasheet suggested straps */
 113         .if2                   = 45600,     /* 4.560 MHz IF from the XC3028 */
 114         .parallel_ts           = 1,         /* Not a serial TS */
 115         .no_tuner              = 1,         /* XC3028 is not behind the gate */
 116         .disable_i2c_gate_ctrl = 1,         /* Disable the I2C gate */
 117 };
 118
 119 /*
 120  * CX18_CARD_YUAN_MPC718
 121  */
 122 /*
 123  * Due to
 124  *
 125  * 1. an absence of information on how to prgram the MT352
 126  * 2. the Linux mt352 module pushing MT352 initialzation off onto us here
 127  *
 128  * We have to use an init sequence that *you* must extract from the Windows
 129  * driver (yuanrap.sys) and which we load as a firmware.
 130  *
 131  * If someone can provide me with a Zarlink MT352 (Intel CE6352?) Design Manual
 132  * with chip programming details, then I can remove this annoyance.
 133  */
 134 static int yuan_mpc718_mt352_reqfw(struct cx18_stream *stream,
 135                                    const struct firmware **fw)
 136 {
 137         struct cx18 *cx = stream->cx;
 138         const char *fn = "dvb-cx18-mpc718-mt352.fw";
 139         int ret;
 140
 141         ret = request_firmware(fw, fn, &cx->pci_dev->dev);
 142         if (ret)
 143                 CX18_ERR("Unable to open firmware file %s\n", fn);
 144         else {
 145                 size_t sz = (*fw)->size;
 146                 if (sz < 2 || sz > 64 || (sz % 2) != 0) {
 147                         CX18_ERR("Firmware %s has a bad size: %lu bytes\n",
 148                                  fn, (unsigned long) sz);
 149                         ret = -EILSEQ;
 150                         release_firmware(*fw);
 151                         *fw = NULL;
 152                 }
 153         }
 154
 155         if (ret) {
 156                 CX18_ERR("The MPC718 board variant with the MT352 DVB-T"
 157                           "demodualtor will not work without it\n");
 158                 CX18_ERR("Run 'linux/Documentation/dvb/get_dvb_firmware "
 159                           "mpc718' if you need the firmware\n");
 160         }
 161         return ret;
 162 }
 163
 164 static int yuan_mpc718_mt352_init(struct dvb_frontend *fe)
 165 {
 166         struct cx18_dvb *dvb = container_of(fe->dvb,
 167                                             struct cx18_dvb, dvb_adapter);
 168         struct cx18_stream *stream = dvb->stream;
 169         const struct firmware *fw = NULL;
 170         int ret;
 171         int i;
 172         u8 buf[3];
 173
 174         ret = yuan_mpc718_mt352_reqfw(stream, &fw);
 175         if (ret)
 176                 return ret;
 177
 178         /* Loop through all the register-value pairs in the firmware file */
 179         for (i = 0; i < fw->size; i += 2) {
 180                 buf[0] = fw->data[i];
 181                 /* Intercept a few registers we want to set ourselves */
 182                 switch (buf[0]) {
 183                 case TRL_NOMINAL_RATE_0:
 184                         /* Set our custom OFDM bandwidth in the case below */
 185                         break;
 186                 case TRL_NOMINAL_RATE_1:
 187                         /* 6 MHz: 64/7 * 6/8 / 20.48 * 2^16 = 0x55b6.db6 */
 188                         /* 7 MHz: 64/7 * 7/8 / 20.48 * 2^16 = 0x6400 */
 189                         /* 8 MHz: 64/7 * 8/8 / 20.48 * 2^16 = 0x7249.249 */
 190                         buf[1] = 0x72;
 191                         buf[2] = 0x49;
 192                         mt352_write(fe, buf, 3);
 193                         break;
 194                 case INPUT_FREQ_0:
 195                         /* Set our custom IF in the case below */
 196                         break;
 197                 case INPUT_FREQ_1:
 198                         /* 4.56 MHz IF: (20.48 - 4.56)/20.48 * 2^14 = 0x31c0 */
 199                         buf[1] = 0x31;
 200                         buf[2] = 0xc0;
 201                         mt352_write(fe, buf, 3);
 202                         break;
 203                 default:
 204                         /* Pass through the register-value pair from the fw */
 205                         buf[1] = fw->data[i+1];
 206                         mt352_write(fe, buf, 2);
 207                         break;
 208                 }
 209         }
 210
 211         buf[0] = (u8) TUNER_GO;
 212         buf[1] = 0x01; /* Go */
 213         mt352_write(fe, buf, 2);
 214         release_firmware(fw);
 215         return 0;
 216 }
 217
 218 static struct mt352_config yuan_mpc718_mt352_demod = {
 219         .demod_address = 0x1e >> 1,
 220         .adc_clock     = 20480,     /* 20.480 MHz */
 221         .if2           =  4560,     /*  4.560 MHz */
 222         .no_tuner      = 1,         /* XC3028 is not behind the gate */
 223         .demod_init    = yuan_mpc718_mt352_init,
 224 };
 225
 226 static struct zl10353_config yuan_mpc718_zl10353_demod = {
 227         .demod_address         = 0x1e >> 1, /* Datasheet suggested straps */
 228         .if2                   = 45600,     /* 4.560 MHz IF from the XC3028 */
 229         .parallel_ts           = 1,         /* Not a serial TS */
 230         .no_tuner              = 1,         /* XC3028 is not behind the gate */
 231         .disable_i2c_gate_ctrl = 1,         /* Disable the I2C gate */
 232 };
 233
 234 static struct zl10353_config gotview_dvd3_zl10353_demod = {
 235         .demod_address         = 0x1e >> 1, /* Datasheet suggested straps */
 236         .if2                   = 45600,     /* 4.560 MHz IF from the XC3028 */
 237         .parallel_ts           = 1,         /* Not a serial TS */
 238         .no_tuner              = 1,         /* XC3028 is not behind the gate */
 239         .disable_i2c_gate_ctrl = 1,         /* Disable the I2C gate */
 240 };
 241
 242 static int dvb_register(struct cx18_stream *stream);
 243
 244 /* Kernel DVB framework calls this when the feed needs to start.
 245  * The CX18 framework should enable the transport DMA handling
 246  * and queue processing.
 247  */
 248 static int cx18_dvb_start_feed(struct dvb_demux_feed *feed)
 249 {
 250         struct dvb_demux *demux = feed->demux;
 251         struct cx18_stream *stream = (struct cx18_stream *) demux->priv;
 252         struct cx18 *cx;
 253         int ret;
 254         u32 v;
 255
 256         if (!stream)
 257                 return -EINVAL;
 258
 259         cx = stream->cx;
 260         CX18_DEBUG_INFO("Start feed: pid = 0x%x index = %d\n",
 261                         feed->pid, feed->index);
 262
 263         mutex_lock(&cx->serialize_lock);
 264         ret = cx18_init_on_first_open(cx);
 265         mutex_unlock(&cx->serialize_lock);
 266         if (ret) {
 267                 CX18_ERR("Failed to initialize firmware starting DVB feed\n");
 268                 return ret;
 269         }
 270         ret = -EINVAL;
 271
 272         switch (cx->card->type) {
 273         case CX18_CARD_HVR_1600_ESMT:
 274         case CX18_CARD_HVR_1600_SAMSUNG:
 275         case CX18_CARD_HVR_1600_S5H1411:
 276                 v = cx18_read_reg(cx, CX18_REG_DMUX_NUM_PORT_0_CONTROL);
 277                 v |= 0x00400000; /* Serial Mode */
 278                 v |= 0x00002000; /* Data Length - Byte */
 279                 v |= 0x00010000; /* Error - Polarity */
 280                 v |= 0x00020000; /* Error - Passthru */
 281                 v |= 0x000c0000; /* Error - Ignore */
 282                 cx18_write_reg(cx, v, CX18_REG_DMUX_NUM_PORT_0_CONTROL);
 283                 break;
 284
 285         case CX18_CARD_LEADTEK_DVR3100H:
 286         case CX18_CARD_YUAN_MPC718:
 287         case CX18_CARD_GOTVIEW_PCI_DVD3:
 288         default:
 289                 /* Assumption - Parallel transport - Signalling
 290                  * undefined or default.
 291                  */
 292                 break;
 293         }
 294
 295         if (!demux->dmx.frontend)
 296                 return -EINVAL;
 297
 298         mutex_lock(&stream->dvb->feedlock);
 299         if (stream->dvb->feeding++ == 0) {
 300                 CX18_DEBUG_INFO("Starting Transport DMA\n");
 301                 mutex_lock(&cx->serialize_lock);
 302                 set_bit(CX18_F_S_STREAMING, &stream->s_flags);
 303                 ret = cx18_start_v4l2_encode_stream(stream);
 304                 if (ret < 0) {
 305                         CX18_DEBUG_INFO("Failed to start Transport DMA\n");
 306                         stream->dvb->feeding--;
 307                         if (stream->dvb->feeding == 0)
 308                                 clear_bit(CX18_F_S_STREAMING, &stream->s_flags);
 309                 }
 310                 mutex_unlock(&cx->serialize_lock);
 311         } else
 312                 ret = 0;
 313         mutex_unlock(&stream->dvb->feedlock);
 314
 315         return ret;
 316 }
 317
 318 /* Kernel DVB framework calls this when the feed needs to stop. */
 319 static int cx18_dvb_stop_feed(struct dvb_demux_feed *feed)
 320 {
 321         struct dvb_demux *demux = feed->demux;
 322         struct cx18_stream *stream = (struct cx18_stream *)demux->priv;
 323         struct cx18 *cx;
 324         int ret = -EINVAL;
 325
 326         if (stream) {
 327                 cx = stream->cx;
 328                 CX18_DEBUG_INFO("Stop feed: pid = 0x%x index = %d\n",
 329                                 feed->pid, feed->index);
 330
 331                 mutex_lock(&stream->dvb->feedlock);
 332                 if (--stream->dvb->feeding == 0) {
 333                         CX18_DEBUG_INFO("Stopping Transport DMA\n");
 334                         mutex_lock(&cx->serialize_lock);
 335                         ret = cx18_stop_v4l2_encode_stream(stream, 0);
 336                         mutex_unlock(&cx->serialize_lock);
 337                 } else
 338                         ret = 0;
 339                 mutex_unlock(&stream->dvb->feedlock);
 340         }
 341
 342         return ret;
 343 }
 344
 345 int cx18_dvb_register(struct cx18_stream *stream)
 346 {
 347         struct cx18 *cx = stream->cx;
 348         struct cx18_dvb *dvb = stream->dvb;
 349         struct dvb_adapter *dvb_adapter;
 350         struct dvb_demux *dvbdemux;
 351         struct dmx_demux *dmx;
 352         int ret;
 353
 354         if (!dvb)
 355                 return -EINVAL;
 356
 357         dvb->enabled = 0;
 358         dvb->stream = stream;
 359
 360         ret = dvb_register_adapter(&dvb->dvb_adapter,
 361                         CX18_DRIVER_NAME,
 362                         THIS_MODULE, &cx->pci_dev->dev, adapter_nr);
 363         if (ret < 0)
 364                 goto err_out;
 365
 366         dvb_adapter = &dvb->dvb_adapter;
 367
 368         dvbdemux = &dvb->demux;
 369
 370         dvbdemux->priv = (void *)stream;
 371
 372         dvbdemux->filternum = 256;
 373         dvbdemux->feednum = 256;
 374         dvbdemux->start_feed = cx18_dvb_start_feed;
 375         dvbdemux->stop_feed = cx18_dvb_stop_feed;
 376         dvbdemux->dmx.capabilities = (DMX_TS_FILTERING |
 377                 DMX_SECTION_FILTERING | DMX_MEMORY_BASED_FILTERING);
 378         ret = dvb_dmx_init(dvbdemux);
 379         if (ret < 0)
 380                 goto err_dvb_unregister_adapter;
 381
 382         dmx = &dvbdemux->dmx;
 383
 384         dvb->hw_frontend.source = DMX_FRONTEND_0;
 385         dvb->mem_frontend.source = DMX_MEMORY_FE;
 386         dvb->dmxdev.filternum = 256;
 387         dvb->dmxdev.demux = dmx;
 388
 389         ret = dvb_dmxdev_init(&dvb->dmxdev, dvb_adapter);
 390         if (ret < 0)
 391                 goto err_dvb_dmx_release;
 392
 393         ret = dmx->add_frontend(dmx, &dvb->hw_frontend);
 394         if (ret < 0)
 395                 goto err_dvb_dmxdev_release;
 396
 397         ret = dmx->add_frontend(dmx, &dvb->mem_frontend);
 398         if (ret < 0)
 399                 goto err_remove_hw_frontend;
 400
 401         ret = dmx->connect_frontend(dmx, &dvb->hw_frontend);
 402         if (ret < 0)
 403                 goto err_remove_mem_frontend;
 404
 405         ret = dvb_register(stream);
 406         if (ret < 0)
 407                 goto err_disconnect_frontend;
 408
 409         dvb_net_init(dvb_adapter, &dvb->dvbnet, dmx);
 410
 411         CX18_INFO("DVB Frontend registered\n");
 412         CX18_INFO("Registered DVB adapter%d for %s (%d x %d.%02d kB)\n",
 413                   stream->dvb->dvb_adapter.num, stream->name,
 414                   stream->buffers, stream->buf_size/1024,
 415                   (stream->buf_size * 100 / 1024) % 100);
 416
 417         mutex_init(&dvb->feedlock);
 418         dvb->enabled = 1;
 419         return ret;
 420
 421 err_disconnect_frontend:
 422         dmx->disconnect_frontend(dmx);
 423 err_remove_mem_frontend:
 424         dmx->remove_frontend(dmx, &dvb->mem_frontend);
 425 err_remove_hw_frontend:
 426         dmx->remove_frontend(dmx, &dvb->hw_frontend);
 427 err_dvb_dmxdev_release:
 428         dvb_dmxdev_release(&dvb->dmxdev);
 429 err_dvb_dmx_release:
 430         dvb_dmx_release(dvbdemux);
 431 err_dvb_unregister_adapter:
 432         dvb_unregister_adapter(dvb_adapter);
 433 err_out:
 434         return ret;
 435 }
 436
 437 void cx18_dvb_unregister(struct cx18_stream *stream)
 438 {
 439         struct cx18 *cx = stream->cx;
 440         struct cx18_dvb *dvb = stream->dvb;
 441         struct dvb_adapter *dvb_adapter;
 442         struct dvb_demux *dvbdemux;
 443         struct dmx_demux *dmx;
 444
 445         CX18_INFO("unregister DVB\n");
 446
 447         if (dvb == NULL || !dvb->enabled)
 448                 return;
 449
 450         dvb_adapter = &dvb->dvb_adapter;
 451         dvbdemux = &dvb->demux;
 452         dmx = &dvbdemux->dmx;
 453
 454         dmx->close(dmx);
 455         dvb_net_release(&dvb->dvbnet);
 456         dmx->remove_frontend(dmx, &dvb->mem_frontend);
 457         dmx->remove_frontend(dmx, &dvb->hw_frontend);
 458         dvb_dmxdev_release(&dvb->dmxdev);
 459         dvb_dmx_release(dvbdemux);
 460         dvb_unregister_frontend(dvb->fe);
 461         dvb_frontend_detach(dvb->fe);
 462         dvb_unregister_adapter(dvb_adapter);
 463 }
 464
 465 /* All the DVB attach calls go here, this function get's modified
 466  * for each new card. cx18_dvb_start_feed() will also need changes.
 467  */
 468 static int dvb_register(struct cx18_stream *stream)
 469 {
 470         struct cx18_dvb *dvb = stream->dvb;
 471         struct cx18 *cx = stream->cx;
 472         int ret = 0;
 473
 474         switch (cx->card->type) {
 475         case CX18_CARD_HVR_1600_ESMT:
 476         case CX18_CARD_HVR_1600_SAMSUNG:
 477                 dvb->fe = dvb_attach(s5h1409_attach,
 478                         &hauppauge_hvr1600_config,
 479                         &cx->i2c_adap[0]);
 480                 if (dvb->fe != NULL) {
 481                         dvb_attach(mxl5005s_attach, dvb->fe,
 482                                 &cx->i2c_adap[0],
 483                                 &hauppauge_hvr1600_tuner);
 484                         ret = 0;
 485                 }
 486                 break;
 487         case CX18_CARD_HVR_1600_S5H1411:
 488                 dvb->fe = dvb_attach(s5h1411_attach,
 489                                      &hcw_s5h1411_config,
 490                                      &cx->i2c_adap[0]);
 491                 if (dvb->fe != NULL)
 492                         dvb_attach(tda18271_attach, dvb->fe,
 493                                    0x60, &cx->i2c_adap[0],
 494                                    &hauppauge_tda18271_config);
 495                 break;
 496         case CX18_CARD_LEADTEK_DVR3100H:
 497                 dvb->fe = dvb_attach(zl10353_attach,
 498                                      &leadtek_dvr3100h_demod,
 499                                      &cx->i2c_adap[1]);
 500                 if (dvb->fe != NULL) {
 501                         struct dvb_frontend *fe;
 502                         struct xc2028_config cfg = {
 503                                 .i2c_adap = &cx->i2c_adap[1],
 504                                 .i2c_addr = 0xc2 >> 1,
 505                                 .ctrl = NULL,
 506                         };
 507                         static struct xc2028_ctrl ctrl = {
 508                                 .fname   = XC2028_DEFAULT_FIRMWARE,
 509                                 .max_len = 64,
 510                                 .demod   = XC3028_FE_ZARLINK456,
 511                                 .type    = XC2028_AUTO,
 512                         };
 513
 514                         fe = dvb_attach(xc2028_attach, dvb->fe, &cfg);
 515                         if (fe != NULL && fe->ops.tuner_ops.set_config != NULL)
 516                                 fe->ops.tuner_ops.set_config(fe, &ctrl);
 517                 }
 518                 break;
 519         case CX18_CARD_YUAN_MPC718:
 520                 /*
 521                  * TODO
 522                  * Apparently, these cards also could instead have a
 523                  * DiBcom demod supported by one of the db7000 drivers
 524                  */
 525                 dvb->fe = dvb_attach(mt352_attach,
 526                                      &yuan_mpc718_mt352_demod,
 527                                      &cx->i2c_adap[1]);
 528                 if (dvb->fe == NULL)
 529                         dvb->fe = dvb_attach(zl10353_attach,
 530                                              &yuan_mpc718_zl10353_demod,
 531                                              &cx->i2c_adap[1]);
 532                 if (dvb->fe != NULL) {
 533                         struct dvb_frontend *fe;
 534                         struct xc2028_config cfg = {
 535                                 .i2c_adap = &cx->i2c_adap[1],
 536                                 .i2c_addr = 0xc2 >> 1,
 537                                 .ctrl = NULL,
 538                         };
 539                         static struct xc2028_ctrl ctrl = {
 540                                 .fname   = XC2028_DEFAULT_FIRMWARE,
 541                                 .max_len = 64,
 542                                 .demod   = XC3028_FE_ZARLINK456,
 543                                 .type    = XC2028_AUTO,
 544                         };
 545
 546                         fe = dvb_attach(xc2028_attach, dvb->fe, &cfg);
 547                         if (fe != NULL && fe->ops.tuner_ops.set_config != NULL)
 548                                 fe->ops.tuner_ops.set_config(fe, &ctrl);
 549                 }
 550                 break;
 551         case CX18_CARD_GOTVIEW_PCI_DVD3:
 552                         dvb->fe = dvb_attach(zl10353_attach,
 553                                              &gotview_dvd3_zl10353_demod,
 554                                              &cx->i2c_adap[1]);
 555                 if (dvb->fe != NULL) {
 556                         struct dvb_frontend *fe;
 557                         struct xc2028_config cfg = {
 558                                 .i2c_adap = &cx->i2c_adap[1],
 559                                 .i2c_addr = 0xc2 >> 1,
 560                                 .ctrl = NULL,
 561                         };
 562                         static struct xc2028_ctrl ctrl = {
 563                                 .fname   = XC2028_DEFAULT_FIRMWARE,
 564                                 .max_len = 64,
 565                                 .demod   = XC3028_FE_ZARLINK456,
 566                                 .type    = XC2028_AUTO,
 567                         };
 568
 569                         fe = dvb_attach(xc2028_attach, dvb->fe, &cfg);
 570                         if (fe != NULL && fe->ops.tuner_ops.set_config != NULL)
 571                                 fe->ops.tuner_ops.set_config(fe, &ctrl);
 572                 }
 573                 break;
 574         default:
 575                 /* No Digital Tv Support */
 576                 break;
 577         }
 578
 579         if (dvb->fe == NULL) {
 580                 CX18_ERR("frontend initialization failed\n");
 581                 return -1;
 582         }
 583
 584         dvb->fe->callback = cx18_reset_tuner_gpio;
 585
 586         ret = dvb_register_frontend(&dvb->dvb_adapter, dvb->fe);
 587         if (ret < 0) {
 588                 if (dvb->fe->ops.release)
 589                         dvb->fe->ops.release(dvb->fe);
 590                 return ret;
 591         }
 592
 593         /*
 594          * The firmware seems to enable the TS DMUX clock
 595          * under various circumstances.  However, since we know we
 596          * might use it, let's just turn it on ourselves here.
 597          */
 598         cx18_write_reg_expect(cx,
 599                               (CX18_DMUX_CLK_MASK << 16) | CX18_DMUX_CLK_MASK,
 600                               CX18_CLOCK_ENABLE2,
 601                               CX18_DMUX_CLK_MASK,
 602                               (CX18_DMUX_CLK_MASK << 16) | CX18_DMUX_CLK_MASK);
 603
 604         return ret;
 605 }