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 <linux/module.h>
  23 #include <linux/slab.h>
  24 #include <linux/init.h>
  25 #include <linux/device.h>
  26 #include <linux/suspend.h>
  27 #include <media/v4l2-common.h>
  28 #include <media/tuner.h>
  29
  30 #include "au0828.h"
  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 == 0) {
 125                 dprintk(2, "%s: not streaming!\n", __func__);
 126                 return;
 127         }
 128
 129         if (ptype != PIPE_BULK) {
 130                 printk(KERN_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         dev->urb_streaming = 0;
 163         for (i = 0; i < URB_COUNT; i++) {
 164                 if (dev->urbs[i]) {
 165                         usb_kill_urb(dev->urbs[i]);
 166                         if (!preallocate_big_buffers)
 167                                 kfree(dev->urbs[i]->transfer_buffer);
 168
 169                         usb_free_urb(dev->urbs[i]);
 170                 }
 171         }
 172
 173         return 0;
 174 }
 175
 176 static int start_urb_transfer(struct au0828_dev *dev)
 177 {
 178         struct urb *purb;
 179         int i, ret = -ENOMEM;
 180
 181         dprintk(2, "%s()\n", __func__);
 182
 183         if (dev->urb_streaming) {
 184                 dprintk(2, "%s: bulk xfer already running!\n", __func__);
 185                 return 0;
 186         }
 187
 188         for (i = 0; i < URB_COUNT; i++) {
 189
 190                 dev->urbs[i] = usb_alloc_urb(0, GFP_KERNEL);
 191                 if (!dev->urbs[i])
 192                         goto err;
 193
 194                 purb = dev->urbs[i];
 195
 196                 if (preallocate_big_buffers)
 197                         purb->transfer_buffer = dev->dig_transfer_buffer[i];
 198                 else
 199                         purb->transfer_buffer = kzalloc(URB_BUFSIZE,
 200                                         GFP_KERNEL);
 201
 202                 if (!purb->transfer_buffer) {
 203                         usb_free_urb(purb);
 204                         dev->urbs[i] = NULL;
 205                         printk(KERN_ERR
 206                                "%s: failed big buffer allocation, err = %d\n",
 207                                __func__, ret);
 208                         goto err;
 209                 }
 210
 211                 purb->status = -EINPROGRESS;
 212                 usb_fill_bulk_urb(purb,
 213                                   dev->usbdev,
 214                                   usb_rcvbulkpipe(dev->usbdev,
 215                                         _AU0828_BULKPIPE),
 216                                   purb->transfer_buffer,
 217                                   URB_BUFSIZE,
 218                                   urb_completion,
 219                                   dev);
 220
 221         }
 222
 223         for (i = 0; i < URB_COUNT; i++) {
 224                 ret = usb_submit_urb(dev->urbs[i], GFP_ATOMIC);
 225                 if (ret != 0) {
 226                         stop_urb_transfer(dev);
 227                         printk(KERN_ERR "%s: failed urb submission, "
 228                                "err = %d\n", __func__, ret);
 229                         return ret;
 230                 }
 231         }
 232
 233         dev->urb_streaming = 1;
 234         ret = 0;
 235
 236 err:
 237         return ret;
 238 }
 239
 240 static void au0828_start_transport(struct au0828_dev *dev)
 241 {
 242         au0828_write(dev, 0x608, 0x90);
 243         au0828_write(dev, 0x609, 0x72);
 244         au0828_write(dev, 0x60a, 0x71);
 245         au0828_write(dev, 0x60b, 0x01);
 246
 247 }
 248
 249 static void au0828_stop_transport(struct au0828_dev *dev, int full_stop)
 250 {
 251         if (full_stop) {
 252                 au0828_write(dev, 0x608, 0x00);
 253                 au0828_write(dev, 0x609, 0x00);
 254                 au0828_write(dev, 0x60a, 0x00);
 255         }
 256         au0828_write(dev, 0x60b, 0x00);
 257 }
 258
 259 static int au0828_dvb_start_feed(struct dvb_demux_feed *feed)
 260 {
 261         struct dvb_demux *demux = feed->demux;
 262         struct au0828_dev *dev = (struct au0828_dev *) demux->priv;
 263         struct au0828_dvb *dvb = &dev->dvb;
 264         int ret = 0;
 265
 266         dprintk(1, "%s()\n", __func__);
 267
 268         if (!demux->dmx.frontend)
 269                 return -EINVAL;
 270
 271         if (dvb) {
 272                 mutex_lock(&dvb->lock);
 273                 dvb->start_count++;
 274                 dprintk(1, "%s(), start_count: %d, stop_count: %d\n", __func__,
 275                         dvb->start_count, dvb->stop_count);
 276                 if (dvb->feeding++ == 0) {
 277                         /* Start transport */
 278                         au0828_start_transport(dev);
 279                         ret = start_urb_transfer(dev);
 280                         if (ret < 0) {
 281                                 au0828_stop_transport(dev, 0);
 282                                 dvb->feeding--; /* We ran out of memory... */
 283                         }
 284                 }
 285                 mutex_unlock(&dvb->lock);
 286         }
 287
 288         return ret;
 289 }
 290
 291 static int au0828_dvb_stop_feed(struct dvb_demux_feed *feed)
 292 {
 293         struct dvb_demux *demux = feed->demux;
 294         struct au0828_dev *dev = (struct au0828_dev *) demux->priv;
 295         struct au0828_dvb *dvb = &dev->dvb;
 296         int ret = 0;
 297
 298         dprintk(1, "%s()\n", __func__);
 299
 300         if (dvb) {
 301                 cancel_work_sync(&dev->restart_streaming);
 302
 303                 mutex_lock(&dvb->lock);
 304                 dvb->stop_count++;
 305                 dprintk(1, "%s(), start_count: %d, stop_count: %d\n", __func__,
 306                         dvb->start_count, dvb->stop_count);
 307                 if (dvb->feeding > 0) {
 308                         dvb->feeding--;
 309                         if (dvb->feeding == 0) {
 310                                 /* Stop transport */
 311                                 ret = stop_urb_transfer(dev);
 312                                 au0828_stop_transport(dev, 0);
 313                         }
 314                 }
 315                 mutex_unlock(&dvb->lock);
 316         }
 317
 318         return ret;
 319 }
 320
 321 static void au0828_restart_dvb_streaming(struct work_struct *work)
 322 {
 323         struct au0828_dev *dev = container_of(work, struct au0828_dev,
 324                                               restart_streaming);
 325         struct au0828_dvb *dvb = &dev->dvb;
 326
 327         if (dev->urb_streaming == 0)
 328                 return;
 329
 330         dprintk(1, "Restarting streaming...!\n");
 331
 332         mutex_lock(&dvb->lock);
 333
 334         /* Stop transport */
 335         stop_urb_transfer(dev);
 336         au0828_stop_transport(dev, 1);
 337
 338         /* Start transport */
 339         au0828_start_transport(dev);
 340         start_urb_transfer(dev);
 341
 342         mutex_unlock(&dvb->lock);
 343 }
 344
 345 static int au0828_set_frontend(struct dvb_frontend *fe)
 346 {
 347         struct au0828_dev *dev = fe->dvb->priv;
 348         struct au0828_dvb *dvb = &dev->dvb;
 349         int ret, was_streaming;
 350
 351         mutex_lock(&dvb->lock);
 352         was_streaming = dev->urb_streaming;
 353         if (was_streaming) {
 354                 au0828_stop_transport(dev, 1);
 355
 356                 /*
 357                  * We can't hold a mutex here, as the restart_streaming
 358                  * kthread may also hold it.
 359                  */
 360                 mutex_unlock(&dvb->lock);
 361                 cancel_work_sync(&dev->restart_streaming);
 362                 mutex_lock(&dvb->lock);
 363
 364                 stop_urb_transfer(dev);
 365         }
 366         mutex_unlock(&dvb->lock);
 367
 368         ret = dvb->set_frontend(fe);
 369
 370         if (was_streaming) {
 371                 mutex_lock(&dvb->lock);
 372                 au0828_start_transport(dev);
 373                 start_urb_transfer(dev);
 374                 mutex_unlock(&dvb->lock);
 375         }
 376
 377         return ret;
 378 }
 379
 380 static int dvb_register(struct au0828_dev *dev)
 381 {
 382         struct au0828_dvb *dvb = &dev->dvb;
 383         int result;
 384
 385         dprintk(1, "%s()\n", __func__);
 386
 387         if (preallocate_big_buffers) {
 388                 int i;
 389                 for (i = 0; i < URB_COUNT; i++) {
 390                         dev->dig_transfer_buffer[i] = kzalloc(URB_BUFSIZE,
 391                                         GFP_KERNEL);
 392
 393                         if (!dev->dig_transfer_buffer[i]) {
 394                                 result = -ENOMEM;
 395
 396                                 printk(KERN_ERR
 397                                        "%s: failed buffer allocation (errno = %d)\n",
 398                                        DRIVER_NAME, result);
 399                                 goto fail_adapter;
 400                         }
 401                 }
 402         }
 403
 404         INIT_WORK(&dev->restart_streaming, au0828_restart_dvb_streaming);
 405
 406         /* register adapter */
 407         result = dvb_register_adapter(&dvb->adapter, DRIVER_NAME, THIS_MODULE,
 408                                       &dev->usbdev->dev, adapter_nr);
 409         if (result < 0) {
 410                 printk(KERN_ERR "%s: dvb_register_adapter failed "
 411                        "(errno = %d)\n", DRIVER_NAME, result);
 412                 goto fail_adapter;
 413         }
 414         dvb->adapter.priv = dev;
 415
 416         /* register frontend */
 417         result = dvb_register_frontend(&dvb->adapter, dvb->frontend);
 418         if (result < 0) {
 419                 printk(KERN_ERR "%s: dvb_register_frontend failed "
 420                        "(errno = %d)\n", DRIVER_NAME, result);
 421                 goto fail_frontend;
 422         }
 423
 424         /* Hook dvb frontend */
 425         dvb->set_frontend = dvb->frontend->ops.set_frontend;
 426         dvb->frontend->ops.set_frontend = au0828_set_frontend;
 427
 428         /* register demux stuff */
 429         dvb->demux.dmx.capabilities =
 430                 DMX_TS_FILTERING | DMX_SECTION_FILTERING |
 431                 DMX_MEMORY_BASED_FILTERING;
 432         dvb->demux.priv       = dev;
 433         dvb->demux.filternum  = 256;
 434         dvb->demux.feednum    = 256;
 435         dvb->demux.start_feed = au0828_dvb_start_feed;
 436         dvb->demux.stop_feed  = au0828_dvb_stop_feed;
 437         result = dvb_dmx_init(&dvb->demux);
 438         if (result < 0) {
 439                 printk(KERN_ERR "%s: dvb_dmx_init failed (errno = %d)\n",
 440                        DRIVER_NAME, result);
 441                 goto fail_dmx;
 442         }
 443
 444         dvb->dmxdev.filternum    = 256;
 445         dvb->dmxdev.demux        = &dvb->demux.dmx;
 446         dvb->dmxdev.capabilities = 0;
 447         result = dvb_dmxdev_init(&dvb->dmxdev, &dvb->adapter);
 448         if (result < 0) {
 449                 printk(KERN_ERR "%s: dvb_dmxdev_init failed (errno = %d)\n",
 450                        DRIVER_NAME, 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                 printk(KERN_ERR "%s: add_frontend failed "
 458                        "(DMX_FRONTEND_0, errno = %d)\n", DRIVER_NAME, 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                 printk(KERN_ERR "%s: add_frontend failed "
 466                        "(DMX_MEMORY_FE, errno = %d)\n", DRIVER_NAME, 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                 printk(KERN_ERR "%s: connect_frontend failed (errno = %d)\n",
 473                        DRIVER_NAME, result);
 474                 goto fail_fe_conn;
 475         }
 476
 477         /* register network adapter */
 478         dvb_net_init(&dvb->adapter, &dvb->net, &dvb->demux.dmx);
 479
 480         dvb->start_count = 0;
 481         dvb->stop_count = 0;
 482         return 0;
 483
 484 fail_fe_conn:
 485         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 486 fail_fe_mem:
 487         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 488 fail_fe_hw:
 489         dvb_dmxdev_release(&dvb->dmxdev);
 490 fail_dmxdev:
 491         dvb_dmx_release(&dvb->demux);
 492 fail_dmx:
 493         dvb_unregister_frontend(dvb->frontend);
 494 fail_frontend:
 495         dvb_frontend_detach(dvb->frontend);
 496         dvb_unregister_adapter(&dvb->adapter);
 497 fail_adapter:
 498
 499         if (preallocate_big_buffers) {
 500                 int i;
 501                 for (i = 0; i < URB_COUNT; i++)
 502                         kfree(dev->dig_transfer_buffer[i]);
 503         }
 504
 505         return result;
 506 }
 507
 508 void au0828_dvb_unregister(struct au0828_dev *dev)
 509 {
 510         struct au0828_dvb *dvb = &dev->dvb;
 511
 512         dprintk(1, "%s()\n", __func__);
 513
 514         if (dvb->frontend == NULL)
 515                 return;
 516
 517         cancel_work_sync(&dev->restart_streaming);
 518
 519         dvb_net_release(&dvb->net);
 520         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_mem);
 521         dvb->demux.dmx.remove_frontend(&dvb->demux.dmx, &dvb->fe_hw);
 522         dvb_dmxdev_release(&dvb->dmxdev);
 523         dvb_dmx_release(&dvb->demux);
 524         dvb_unregister_frontend(dvb->frontend);
 525         dvb_frontend_detach(dvb->frontend);
 526         dvb_unregister_adapter(&dvb->adapter);
 527
 528         if (preallocate_big_buffers) {
 529                 int i;
 530                 for (i = 0; i < URB_COUNT; i++)
 531                         kfree(dev->dig_transfer_buffer[i]);
 532         }
 533
 534
 535 }
 536
 537 /* All the DVB attach calls go here, this function get's modified
 538  * for each new card. No other function in this file needs
 539  * to change.
 540  */
 541 int au0828_dvb_register(struct au0828_dev *dev)
 542 {
 543         struct au0828_dvb *dvb = &dev->dvb;
 544         int ret;
 545
 546         dprintk(1, "%s()\n", __func__);
 547
 548         /* init frontend */
 549         switch (dev->boardnr) {
 550         case AU0828_BOARD_HAUPPAUGE_HVR850:
 551         case AU0828_BOARD_HAUPPAUGE_HVR950Q:
 552                 dvb->frontend = dvb_attach(au8522_attach,
 553                                 &hauppauge_hvr950q_config,
 554                                 &dev->i2c_adap);
 555                 if (dvb->frontend != NULL)
 556                         switch (dev->board.tuner_type) {
 557                         default:
 558                         case TUNER_XC5000:
 559                                 dvb_attach(xc5000_attach, dvb->frontend,
 560                                            &dev->i2c_adap,
 561                                            &hauppauge_xc5000a_config);
 562                                 break;
 563                         case TUNER_XC5000C:
 564                                 dvb_attach(xc5000_attach, dvb->frontend,
 565                                            &dev->i2c_adap,
 566                                            &hauppauge_xc5000c_config);
 567                                 break;
 568                         }
 569                 break;
 570         case AU0828_BOARD_HAUPPAUGE_HVR950Q_MXL:
 571                 dvb->frontend = dvb_attach(au8522_attach,
 572                                 &hauppauge_hvr950q_config,
 573                                 &dev->i2c_adap);
 574                 if (dvb->frontend != NULL)
 575                         dvb_attach(mxl5007t_attach, dvb->frontend,
 576                                    &dev->i2c_adap, 0x60,
 577                                    &mxl5007t_hvr950q_config);
 578                 break;
 579         case AU0828_BOARD_HAUPPAUGE_WOODBURY:
 580                 dvb->frontend = dvb_attach(au8522_attach,
 581                                 &hauppauge_woodbury_config,
 582                                 &dev->i2c_adap);
 583                 if (dvb->frontend != NULL)
 584                         dvb_attach(tda18271_attach, dvb->frontend,
 585                                    0x60, &dev->i2c_adap,
 586                                    &hauppauge_woodbury_tunerconfig);
 587                 break;
 588         case AU0828_BOARD_DVICO_FUSIONHDTV7:
 589                 dvb->frontend = dvb_attach(au8522_attach,
 590                                 &fusionhdtv7usb_config,
 591                                 &dev->i2c_adap);
 592                 if (dvb->frontend != NULL) {
 593                         dvb_attach(xc5000_attach, dvb->frontend,
 594                                 &dev->i2c_adap,
 595                                 &hauppauge_xc5000a_config);
 596                 }
 597                 break;
 598         default:
 599                 printk(KERN_WARNING "The frontend of your DVB/ATSC card "
 600                        "isn't supported yet\n");
 601                 break;
 602         }
 603         if (NULL == dvb->frontend) {
 604                 printk(KERN_ERR "%s() Frontend initialization failed\n",
 605                        __func__);
 606                 return -1;
 607         }
 608         /* define general-purpose callback pointer */
 609         dvb->frontend->callback = au0828_tuner_callback;
 610
 611         /* register everything */
 612         ret = dvb_register(dev);
 613         if (ret < 0) {
 614                 if (dvb->frontend->ops.release)
 615                         dvb->frontend->ops.release(dvb->frontend);
 616                 return ret;
 617         }
 618
 619         return 0;
 620 }