drivers/media/usb/au0828/au0828-dvb.c

   1 /*
   2  *  Driver for the Auvitek USB bridge
   3  *
   4  *  Copyright (c) 2008 Steven Toth <stoth@linuxtv.org>
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *
  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, write to the Free Software
  19  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include "au0828.h"
  23
  24 #include <linux/module.h>
  25 #include <linux/slab.h>
  26 #include <linux/init.h>
  27 #include <linux/device.h>
  28 #include <media/v4l2-common.h>
  29 #include <media/tuner.h>
  30
  31 #include "au8522.h"
  32 #include "xc5000.h"
  33 #include "mxl5007t.h"
  34 #include "tda18271.h"
  35
  36 static int preallocate_big_buffers;
  37 module_param_named(preallocate_big_buffers, preallocate_big_buffers, int, 0644);
  38 MODULE_PARM_DESC(preallocate_big_buffers, "Preallocate the larger transfer buffers at module load time");
  39
  40 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  41
  42 #define _AU0828_BULKPIPE 0x83
  43 #define _BULKPIPESIZE 0xe522
  44
  45 static u8 hauppauge_hvr950q_led_states[] = {
  46         0x00, /* off */
  47         0x02, /* yellow */
  48         0x04, /* green */
  49 };
  50
  51 static struct au8522_led_config hauppauge_hvr950q_led_cfg = {
  52         .gpio_output = 0x00e0,
  53         .gpio_output_enable  = 0x6006,
  54         .gpio_output_disable = 0x0660,
  55
  56         .gpio_leds = 0x00e2,
  57         .led_states  = hauppauge_hvr950q_led_states,
  58         .num_led_states = sizeof(hauppauge_hvr950q_led_states),
  59
  60         .vsb8_strong   = 20 /* dB */ * 10,
  61         .qam64_strong  = 25 /* dB */ * 10,
  62         .qam256_strong = 32 /* dB */ * 10,
  63 };
  64
  65 static struct au8522_config hauppauge_hvr950q_config = {
  66         .demod_address = 0x8e >> 1,
  67         .status_mode   = AU8522_DEMODLOCKING,
  68         .qam_if        = AU8522_IF_6MHZ,
  69         .vsb_if        = AU8522_IF_6MHZ,
  70         .led_cfg       = &hauppauge_hvr950q_led_cfg,
  71 };
  72
  73 static struct au8522_config fusionhdtv7usb_config = {
  74         .demod_address = 0x8e >> 1,
  75         .status_mode   = AU8522_DEMODLOCKING,
  76         .qam_if        = AU8522_IF_6MHZ,
  77         .vsb_if        = AU8522_IF_6MHZ,
  78 };
  79
  80 static struct au8522_config hauppauge_woodbury_config = {
  81         .demod_address = 0x8e >> 1,
  82         .status_mode   = AU8522_DEMODLOCKING,
  83         .qam_if        = AU8522_IF_4MHZ,
  84         .vsb_if        = AU8522_IF_3_25MHZ,
  85 };
  86
  87 static struct xc5000_config hauppauge_xc5000a_config = {
  88         .i2c_address      = 0x61,
  89         .if_khz           = 6000,
  90         .chip_id          = XC5000A,
  91 };
  92
  93 static struct xc5000_config hauppauge_xc5000c_config = {
  94         .i2c_address      = 0x61,
  95         .if_khz           = 6000,
  96         .chip_id          = XC5000C,
  97 };
  98
  99 static struct mxl5007t_config mxl5007t_hvr950q_config = {
 100         .xtal_freq_hz = MxL_XTAL_24_MHZ,
 101         .if_freq_hz = MxL_IF_6_MHZ,
 102 };
 103
 104 static struct tda18271_config hauppauge_woodbury_tunerconfig = {
 105         .gate    = TDA18271_GATE_DIGITAL,
 106 };
 107
 108 static void au0828_restart_dvb_streaming(struct work_struct *work);
 109
 110 /*-------------------------------------------------------------------*/
 111 static void urb_completion(struct urb *purb)
 112 {
 113         struct au0828_dev *dev = purb->context;
 114         int ptype = usb_pipetype(purb->pipe);
 115         unsigned char *ptr;
 116
 117         dprintk(2, "%s: %d\n", __func__, purb->actual_length);
 118
 119         if (!dev) {
 120                 dprintk(2, "%s: no dev!\n", __func__);
 121                 return;
 122         }
 123
 124         if (!dev->urb_streaming) {
 125                 dprintk(2, "%s: not streaming!\n", __func__);
 126                 return;
 127         }
 128
 129         if (ptype != PIPE_BULK) {
 130                 pr_err("%s: Unsupported URB type %d\n",
 131                        __func__, ptype);
 132                 return;
 133         }
 134
 135         /* See if the stream is corrupted (to work around a hardware
 136            bug where the stream gets misaligned */
 137         ptr = purb->transfer_buffer;
 138         if (purb->actual_length > 0 && ptr[0] != 0x47) {
 139                 dprintk(1, "Need to restart streaming %02x len=%d!\n",
 140                         ptr[0], purb->actual_length);
 141                 schedule_work(&dev->restart_streaming);
 142                 return;
 143         }
 144
 145         /* Feed the transport payload into the kernel demux */
 146         dvb_dmx_swfilter_packets(&dev->dvb.demux,
 147                 purb->transfer_buffer, purb->actual_length / 188);
 148
 149         /* Clean the buffer before we requeue */
 150         memset(purb->transfer_buffer, 0, URB_BUFSIZE);
 151
 152         /* Requeue URB */
 153         usb_submit_urb(purb, GFP_ATOMIC);
 154 }
 155
 156 static int stop_urb_transfer(struct au0828_dev *dev)
 157 {
 158         int i;
 159
 160         dprintk(2, "%s()\n", __func__);
 161
 162         if (!dev->urb_streaming)
 163                 return 0;
 164
 165         dev->urb_streaming = false;
 166         for (i = 0; i < URB_COUNT; i++) {
 167                 if (dev->urbs[i]) {
 168                         usb_kill_urb(dev->urbs[i]);
 169                         if (!preallocate_big_buffers)
 170                                 kfree(dev->urbs[i]->transfer_buffer);
 171
 172                         usb_free_urb(dev->urbs[i]);
 173                 }
 174         }
 175
 176         return 0;
 177 }
 178
 179 static int start_urb_transfer(struct au0828_dev *dev)
 180 {
 181         struct urb *purb;
 182         int i, ret = -ENOMEM;
 183
 184         dprintk(2, "%s()\n", __func__);
 185
 186         if (dev->urb_streaming) {
 187                 dprintk(2, "%s: bulk xfer already running!\n", __func__);
 188                 return 0;
 189         }
 190
 191         for (i = 0; i < URB_COUNT; i++) {
 192
 193                 dev->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
 194                 if (!dev->urbs[i])
 195                         goto err;
 196
 197                 purb = dev->urbs[i];
 198
 199                 if (preallocate_big_buffers)
 200                         purb->transfer_buffer = dev->dig_transfer_buffer[i];
 201                 else
 202                         purb->transfer_buffer = kzalloc(URB_BUFSIZE,
 203                                         GFP_KERNEL);
 204
 205                 if (!purb->transfer_buffer) {
 206                         usb_free_urb(purb);
 207                         dev->urbs[i] = NULL;
 208                         pr_err("%s: failed big buffer allocation, err = %d\n",
 209                                __func__, ret);
 210                         goto err;
 211                 }
 212
 213                 purb->status = -EINPROGRESS;
 214                 usb_fill_bulk_urb(purb,
 215                                   dev->usbdev,
 216                                   usb_rcvbulkpipe(dev->usbdev,
 217                                         _AU0828_BULKPIPE),
 218                                   purb->transfer_buffer,
 219                                   URB_BUFSIZE,
 220                                   urb_completion,
 221                                   dev);
 222
 223         }
 224
 225         for (i = 0; i < URB_COUNT; i++) {
 226                 ret = usb_submit_urb(dev->urbs[i], GFP_ATOMIC);
 227                 if (ret != 0) {
 228                         stop_urb_transfer(dev);
 229                         pr_err("%s: failed urb submission, err = %d\n",
 230                                __func__, ret);
 231                         return ret;
 232                 }
 233         }
 234
 235         dev->urb_streaming = true;
 236         ret = 0;
 237
 238 err:
 239         return ret;
 240 }
 241
 242 static void au0828_start_transport(struct au0828_dev *dev)
 243 {
 244         au0828_write(dev, 0x608, 0x90);
 245         au0828_write(dev, 0x609, 0x72);
 246         au0828_write(dev, 0x60a, 0x71);
 247         au0828_write(dev, 0x60b, 0x01);
 248
 249 }
 250
 251 static void au0828_stop_transport(struct au0828_dev *dev, int full_stop)
 252 {
 253         if (full_stop) {
 254                 au0828_write(dev, 0x608, 0x00);
 255                 au0828_write(dev, 0x609, 0x00);
 256                 au0828_write(dev, 0x60a, 0x00);
 257         }
 258         au0828_write(dev, 0x60b, 0x00);
 259 }
 260
 261 static int au0828_dvb_start_feed(struct dvb_demux_feed *feed)
 262 {
 263         struct dvb_demux *demux = feed->demux;
 264         struct au0828_dev *dev = (struct au0828_dev *) demux->priv;
 265         struct au0828_dvb *dvb = &dev->dvb;
 266         int ret = 0;
 267
 268         dprintk(1, "%s()\n", __func__);
 269
 270         if (!demux->dmx.frontend)
 271                 return -EINVAL;
 272
 273         if (dvb->frontend) {
 274                 mutex_lock(&dvb->lock);
 275                 dvb->start_count++;
 276                 dprintk(1, "%s(), start_count: %d, stop_count: %d\n", __func__,
 277                         dvb->start_count, dvb->stop_count);
 278                 if (dvb->feeding++ == 0) {
 279                         /* Start transport */
 280                         au0828_start_transport(dev);
 281                         ret = start_urb_transfer(dev);
 282                         if (ret < 0) {
 283                                 au0828_stop_transport(dev, 0);
 284                                 dvb->feeding--; /* We ran out of memory... */
 285                         }
 286                 }
 287                 mutex_unlock(&dvb->lock);
 288         }
 289
 290         return ret;
 291 }
 292
 293 static int au0828_dvb_stop_feed(struct dvb_demux_feed *feed)
 294 {
 295         struct dvb_demux *demux = feed->demux;
 296         struct au0828_dev *dev = (struct au0828_dev *) demux->priv;
 297         struct au0828_dvb *dvb = &dev->dvb;
 298         int ret = 0;
 299
 300         dprintk(1, "%s()\n", __func__);
 301
 302         if (dvb->frontend) {
 303                 cancel_work_sync(&dev->restart_streaming);
 304
 305                 mutex_lock(&dvb->lock);
 306                 dvb->stop_count++;
 307                 dprintk(1, "%s(), start_count: %d, stop_count: %d\n", __func__,
 308                         dvb->start_count, dvb->stop_count);
 309                 if (dvb->feeding > 0) {
 310                         dvb->feeding--;
 311                         if (dvb->feeding == 0) {
 312                                 /* Stop transport */
 313                                 ret = stop_urb_transfer(dev);
 314                                 au0828_stop_transport(dev, 0);
 315                         }
 316                 }
 317                 mutex_unlock(&dvb->lock);
 318         }
 319
 320         return ret;
 321 }
 322
 323 static void au0828_restart_dvb_streaming(struct work_struct *work)
 324 {
 325         struct au0828_dev *dev = container_of(work, struct au0828_dev,
 326                                               restart_streaming);
 327         struct au0828_dvb *dvb = &dev->dvb;
 328
 329         if (!dev->urb_streaming)
 330                 return;
 331
 332         dprintk(1, "Restarting streaming...!\n");
 333
 334         mutex_lock(&dvb->lock);
 335
 336         /* Stop transport */
 337         stop_urb_transfer(dev);
 338         au0828_stop_transport(dev, 1);
 339
 340         /* Start transport */
 341         au0828_start_transport(dev);
 342         start_urb_transfer(dev);
 343
 344         mutex_unlock(&dvb->lock);
 345 }
 346
 347 static int au0828_set_frontend(struct dvb_frontend *fe)
 348 {
 349         struct au0828_dev *dev = fe->dvb->priv;
 350         struct au0828_dvb *dvb = &dev->dvb;
 351         int ret, was_streaming;
 352
 353         mutex_lock(&dvb->lock);
 354         was_streaming = dev->urb_streaming;
 355         if (was_streaming) {
 356                 au0828_stop_transport(dev, 1);
 357
 358                 /*
 359                  * We can't hold a mutex here, as the restart_streaming
 360                  * kthread may also hold it.
 361                  */
 362                 mutex_unlock(&dvb->lock);
 363                 cancel_work_sync(&dev->restart_streaming);
 364                 mutex_lock(&dvb->lock);
 365
 366                 stop_urb_transfer(dev);
 367         }
 368         mutex_unlock(&dvb->lock);
 369
 370         ret = dvb->set_frontend(fe);
 371
 372         if (was_streaming) {
 373                 mutex_lock(&dvb->lock);
 374                 au0828_start_transport(dev);
 375                 start_urb_transfer(dev);
 376                 mutex_unlock(&dvb->lock);
 377         }
 378
 379         return ret;
 380 }
 381
 382 static int dvb_register(struct au0828_dev *dev)
 383 {
 384         struct au0828_dvb *dvb = &dev->dvb;
 385         int result;
 386
 387         dprintk(1, "%s()\n", __func__);
 388
 389         if (preallocate_big_buffers) {
 390                 int i;
 391                 for (i = 0; i < URB_COUNT; i++) {
 392                         dev->dig_transfer_buffer[i] = kzalloc(URB_BUFSIZE,
 393                                         GFP_KERNEL);
 394
 395                         if (!dev->dig_transfer_buffer[i]) {
 396                                 result = -ENOMEM;
 397
 398                                 pr_err("failed buffer allocation (errno = %d)\n",
 399                                        result);
 400                                 goto fail_adapter;
 401                         }
 402                 }
 403         }
 404
 405         INIT_WORK(&dev->restart_streaming, au0828_restart_dvb_streaming);
 406
 407         /* register adapter */
 408         result = dvb_register_adapter(&dvb->adapter,
 409                                       KBUILD_MODNAME, THIS_MODULE,
 410                                       &dev->usbdev->dev, adapter_nr);
 411         if (result < 0) {
 412                 pr_err("dvb_register_adapter failed (errno = %d)\n",
 413                        result);
 414                 goto fail_adapter;
 415         }
 416         dvb->adapter.priv = dev;
 417
 418         /* register frontend */
 419         result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 420         if (result < 0) {
 421                 pr_err("dvb_register_frontend failed (errno = %d)\n",
 422                        result);
 423                 goto fail_frontend;
 424         }
 425
 426         /* Hook dvb frontend */
 427         dvb->set_frontend = dvb->frontend->ops.set_frontend;
 428         dvb->frontend->ops.set_frontend = au0828_set_frontend;
 429
 430         /* register demux stuff */
 431         dvb->demux.dmx.capabilities =
 432                 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
 433                 DMX_MEMORY_BASED_FILTERING;
 434         dvb->demux.priv       = dev;
 435         dvb->demux.filternum  = 256;
 436         dvb->demux.feednum    = 256;
 437         dvb->demux.start_feed = au0828_dvb_start_feed;
 438         dvb->demux.stop_feed  = au0828_dvb_stop_feed;
 439         result = dvb_dmx_init(&dvb->demux);
 440         if (result < 0) {
 441                 pr_err("dvb_dmx_init failed (errno = %d)\n", result);
 442                 goto fail_dmx;
 443         }
 444
 445         dvb->dmxdev.filternum    = 256;
 446         dvb->dmxdev.demux        = &dvb->demux.dmx;
 447         dvb->dmxdev.capabilities = 0;
 448         result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 449         if (result < 0) {
 450                 pr_err("dvb_dmxdev_init failed (errno = %d)\n", result);
 451                 goto fail_dmxdev;
 452         }
 453
 454         dvb->fe_hw.source = DMX_FRONTEND_0;
 455         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 456         if (result < 0) {
 457                 pr_err("add_frontend failed (DMX_FRONTEND_0, errno = %d)\n",
 458                        result);
 459                 goto fail_fe_hw;
 460         }
 461
 462         dvb->fe_mem.source = DMX_MEMORY_FE;
 463         result = dvb->demux.dmx.add_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 464         if (result < 0) {
 465                 pr_err("add_frontend failed (DMX_MEMORY_FE, errno = %d)\n",
 466                        result);
 467                 goto fail_fe_mem;
 468         }
 469
 470         result = dvb->demux.dmx.connect_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 471         if (result < 0) {
 472                 pr_err("connect_frontend failed (errno = %d)\n", result);
 473                 goto fail_fe_conn;
 474         }
 475
 476         /* register network adapter */
 477         dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
 478
 479         dvb->start_count = 0;
 480         dvb->stop_count = 0;
 481         return 0;
 482
 483 fail_fe_conn:
 484         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 485 fail_fe_mem:
 486         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 487 fail_fe_hw:
 488         dvb_dmxdev_release(&dvb->dmxdev);
 489 fail_dmxdev:
 490         dvb_dmx_release(&dvb->demux);
 491 fail_dmx:
 492         dvb_unregister_frontend(dvb->frontend);
 493 fail_frontend:
 494         dvb_frontend_detach(dvb->frontend);
 495         dvb_unregister_adapter(&dvb->adapter);
 496 fail_adapter:
 497
 498         if (preallocate_big_buffers) {
 499                 int i;
 500                 for (i = 0; i < URB_COUNT; i++)
 501                         kfree(dev->dig_transfer_buffer[i]);
 502         }
 503
 504         return result;
 505 }
 506
 507 void au0828_dvb_unregister(struct au0828_dev *dev)
 508 {
 509         struct au0828_dvb *dvb = &dev->dvb;
 510
 511         dprintk(1, "%s()\n", __func__);
 512
 513         if (dvb->frontend == NULL)
 514                 return;
 515
 516         cancel_work_sync(&dev->restart_streaming);
 517
 518         dvb_net_release(&dvb->net);
 519         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 520         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 521         dvb_dmxdev_release(&dvb->dmxdev);
 522         dvb_dmx_release(&dvb->demux);
 523         dvb_unregister_frontend(dvb->frontend);
 524         dvb_frontend_detach(dvb->frontend);
 525         dvb_unregister_adapter(&dvb->adapter);
 526
 527         if (preallocate_big_buffers) {
 528                 int i;
 529                 for (i = 0; i < URB_COUNT; i++)
 530                         kfree(dev->dig_transfer_buffer[i]);
 531         }
 532         dvb->frontend = NULL;
 533 }
 534
 535 /* All the DVB attach calls go here, this function get's modified
 536  * for each new card. No other function in this file needs
 537  * to change.
 538  */
 539 int au0828_dvb_register(struct au0828_dev *dev)
 540 {
 541         struct au0828_dvb *dvb = &dev->dvb;
 542         int ret;
 543
 544         dprintk(1, "%s()\n", __func__);
 545
 546         /* init frontend */
 547         switch (dev->boardnr) {
 548         case AU0828_BOARD_HAUPPAUGE_HVR850:
 549         case AU0828_BOARD_HAUPPAUGE_HVR950Q:
 550                 dvb->frontend = dvb_attach(au8522_attach,
 551                                 &hauppauge_hvr950q_config,
 552                                 &dev->i2c_adap);
 553                 if (dvb->frontend != NULL)
 554                         switch (dev->board.tuner_type) {
 555                         default:
 556                         case TUNER_XC5000:
 557                                 dvb_attach(xc5000_attach, dvb->frontend,
 558                                            &dev->i2c_adap,
 559                                            &hauppauge_xc5000a_config);
 560                                 break;
 561                         case TUNER_XC5000C:
 562                                 dvb_attach(xc5000_attach, dvb->frontend,
 563                                            &dev->i2c_adap,
 564                                            &hauppauge_xc5000c_config);
 565                                 break;
 566                         }
 567                 break;
 568         case AU0828_BOARD_HAUPPAUGE_HVR950Q_MXL:
 569                 dvb->frontend = dvb_attach(au8522_attach,
 570                                 &hauppauge_hvr950q_config,
 571                                 &dev->i2c_adap);
 572                 if (dvb->frontend != NULL)
 573                         dvb_attach(mxl5007t_attach, dvb->frontend,
 574                                    &dev->i2c_adap, 0x60,
 575                                    &mxl5007t_hvr950q_config);
 576                 break;
 577         case AU0828_BOARD_HAUPPAUGE_WOODBURY:
 578                 dvb->frontend = dvb_attach(au8522_attach,
 579                                 &hauppauge_woodbury_config,
 580                                 &dev->i2c_adap);
 581                 if (dvb->frontend != NULL)
 582                         dvb_attach(tda18271_attach, dvb->frontend,
 583                                    0x60, &dev->i2c_adap,
 584                                    &hauppauge_woodbury_tunerconfig);
 585                 break;
 586         case AU0828_BOARD_DVICO_FUSIONHDTV7:
 587                 dvb->frontend = dvb_attach(au8522_attach,
 588                                 &fusionhdtv7usb_config,
 589                                 &dev->i2c_adap);
 590                 if (dvb->frontend != NULL) {
 591                         dvb_attach(xc5000_attach, dvb->frontend,
 592                                 &dev->i2c_adap,
 593                                 &hauppauge_xc5000a_config);
 594                 }
 595                 break;
 596         default:
 597                 pr_warn("The frontend of your DVB/ATSC card isn't supported yet\n");
 598                 break;
 599         }
 600         if (NULL == dvb->frontend) {
 601                 pr_err("%s() Frontend initialization failed\n",
 602                        __func__);
 603                 return -1;
 604         }
 605         /* define general-purpose callback pointer */
 606         dvb->frontend->callback = au0828_tuner_callback;
 607
 608         /* register everything */
 609         ret = dvb_register(dev);
 610         if (ret < 0) {
 611                 if (dvb->frontend->ops.release)
 612                         dvb->frontend->ops.release(dvb->frontend);
 613                 dvb->frontend = NULL;
 614                 return ret;
 615         }
 616
 617         return 0;
 618 }
 619
 620 void au0828_dvb_suspend(struct au0828_dev *dev)
 621 {
 622         struct au0828_dvb *dvb = &dev->dvb;
 623         int rc;
 624
 625         if (dvb->frontend) {
 626                 if (dev->urb_streaming) {
 627                         cancel_work_sync(&dev->restart_streaming);
 628                         /* Stop transport */
 629                         mutex_lock(&dvb->lock);
 630                         stop_urb_transfer(dev);
 631                         au0828_stop_transport(dev, 1);
 632                         mutex_unlock(&dvb->lock);
 633                         dev->need_urb_start = true;
 634                 }
 635                 /* suspend frontend - does tuner and fe to sleep */
 636                 rc = dvb_frontend_suspend(dvb->frontend);
 637                 pr_info("au0828_dvb_suspend(): Suspending DVB fe %d\n", rc);
 638         }
 639 }
 640
 641 void au0828_dvb_resume(struct au0828_dev *dev)
 642 {
 643         struct au0828_dvb *dvb = &dev->dvb;
 644         int rc;
 645
 646         if (dvb->frontend) {
 647                 /* resume frontend - does fe and tuner init */
 648                 rc = dvb_frontend_resume(dvb->frontend);
 649                 pr_info("au0828_dvb_resume(): Resuming DVB fe %d\n", rc);
 650                 if (dev->need_urb_start) {
 651                         /* Start transport */
 652                         mutex_lock(&dvb->lock);
 653                         au0828_start_transport(dev);
 654                         start_urb_transfer(dev);
 655                         mutex_unlock(&dvb->lock);
 656                 }
 657         }
 658 }