git.oblomov.eu Git - linux-2.6/blob - drivers/media/dvb/ttusb-dec/ttusb_dec.c

   1 /*
   2  * TTUSB DEC Driver
   3  *
   4  * Copyright (C) 2003-2004 Alex Woods <linux-dvb@giblets.org>
   5  * IR support by Peter Beutner <p.beutner@gmx.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  * 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
  23 #include <linux/list.h>
  24 #include <linux/module.h>
  25 #include <linux/pci.h>
  26 #include <linux/slab.h>
  27 #include <linux/spinlock.h>
  28 #include <linux/usb.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/firmware.h>
  31 #include <linux/crc32.h>
  32 #include <linux/init.h>
  33 #include <linux/input.h>
  34
  35 #include <linux/mutex.h>
  36
  37 #include "dmxdev.h"
  38 #include "dvb_demux.h"
  39 #include "dvb_filter.h"
  40 #include "dvb_frontend.h"
  41 #include "dvb_net.h"
  42 #include "ttusbdecfe.h"
  43
  44 static int debug;
  45 static int output_pva;
  46 static int enable_rc;
  47
  48 module_param(debug, int, 0644);
  49 MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off).");
  50 module_param(output_pva, int, 0444);
  51 MODULE_PARM_DESC(output_pva, "Output PVA from dvr device (default:off)");
  52 module_param(enable_rc, int, 0644);
  53 MODULE_PARM_DESC(enable_rc, "Turn on/off IR remote control(default: off)");
  54
  55 DVB_DEFINE_MOD_OPT_ADAPTER_NR(adapter_nr);
  56
  57 #define dprintk if (debug) printk
  58
  59 #define DRIVER_NAME             "TechnoTrend/Hauppauge DEC USB"
  60
  61 #define COMMAND_PIPE            0x03
  62 #define RESULT_PIPE             0x04
  63 #define IN_PIPE                 0x08
  64 #define OUT_PIPE                0x07
  65 #define IRQ_PIPE                0x0A
  66
  67 #define COMMAND_PACKET_SIZE     0x3c
  68 #define ARM_PACKET_SIZE         0x1000
  69 #define IRQ_PACKET_SIZE         0x8
  70
  71 #define ISO_BUF_COUNT           0x04
  72 #define FRAMES_PER_ISO_BUF      0x04
  73 #define ISO_FRAME_SIZE          0x0380
  74
  75 #define MAX_PVA_LENGTH          6144
  76
  77 enum ttusb_dec_model {
  78         TTUSB_DEC2000T,
  79         TTUSB_DEC2540T,
  80         TTUSB_DEC3000S
  81 };
  82
  83 enum ttusb_dec_packet_type {
  84         TTUSB_DEC_PACKET_PVA,
  85         TTUSB_DEC_PACKET_SECTION,
  86         TTUSB_DEC_PACKET_EMPTY
  87 };
  88
  89 enum ttusb_dec_interface {
  90         TTUSB_DEC_INTERFACE_INITIAL,
  91         TTUSB_DEC_INTERFACE_IN,
  92         TTUSB_DEC_INTERFACE_OUT
  93 };
  94
  95 struct ttusb_dec {
  96         enum ttusb_dec_model            model;
  97         char                            *model_name;
  98         char                            *firmware_name;
  99         int                             can_playback;
 100
 101         /* DVB bits */
 102         struct dvb_adapter              adapter;
 103         struct dmxdev                   dmxdev;
 104         struct dvb_demux                demux;
 105         struct dmx_frontend             frontend;
 106         struct dvb_net                  dvb_net;
 107         struct dvb_frontend*            fe;
 108
 109         u16                     pid[DMX_PES_OTHER];
 110
 111         /* USB bits */
 112         struct usb_device               *udev;
 113         u8                              trans_count;
 114         unsigned int                    command_pipe;
 115         unsigned int                    result_pipe;
 116         unsigned int                    in_pipe;
 117         unsigned int                    out_pipe;
 118         unsigned int                    irq_pipe;
 119         enum ttusb_dec_interface        interface;
 120         struct mutex                    usb_mutex;
 121
 122         void                    *irq_buffer;
 123         struct urb              *irq_urb;
 124         dma_addr_t              irq_dma_handle;
 125         void                    *iso_buffer;
 126         dma_addr_t              iso_dma_handle;
 127         struct urb              *iso_urb[ISO_BUF_COUNT];
 128         int                     iso_stream_count;
 129         struct mutex            iso_mutex;
 130
 131         u8                              packet[MAX_PVA_LENGTH + 4];
 132         enum ttusb_dec_packet_type      packet_type;
 133         int                             packet_state;
 134         int                             packet_length;
 135         int                             packet_payload_length;
 136         u16                             next_packet_id;
 137
 138         int                             pva_stream_count;
 139         int                             filter_stream_count;
 140
 141         struct dvb_filter_pes2ts        a_pes2ts;
 142         struct dvb_filter_pes2ts        v_pes2ts;
 143
 144         u8                      v_pes[16 + MAX_PVA_LENGTH];
 145         int                     v_pes_length;
 146         int                     v_pes_postbytes;
 147
 148         struct list_head        urb_frame_list;
 149         struct tasklet_struct   urb_tasklet;
 150         spinlock_t              urb_frame_list_lock;
 151
 152         struct dvb_demux_filter *audio_filter;
 153         struct dvb_demux_filter *video_filter;
 154         struct list_head        filter_info_list;
 155         spinlock_t              filter_info_list_lock;
 156
 157         struct input_dev        *rc_input_dev;
 158         char                    rc_phys[64];
 159
 160         int                     active; /* Loaded successfully */
 161 };
 162
 163 struct urb_frame {
 164         u8                      data[ISO_FRAME_SIZE];
 165         int                     length;
 166         struct list_head        urb_frame_list;
 167 };
 168
 169 struct filter_info {
 170         u8                      stream_id;
 171         struct dvb_demux_filter *filter;
 172         struct list_head        filter_info_list;
 173 };
 174
 175 static u16 rc_keys[] = {
 176         KEY_POWER,
 177         KEY_MUTE,
 178         KEY_1,
 179         KEY_2,
 180         KEY_3,
 181         KEY_4,
 182         KEY_5,
 183         KEY_6,
 184         KEY_7,
 185         KEY_8,
 186         KEY_9,
 187         KEY_0,
 188         KEY_CHANNELUP,
 189         KEY_VOLUMEDOWN,
 190         KEY_OK,
 191         KEY_VOLUMEUP,
 192         KEY_CHANNELDOWN,
 193         KEY_PREVIOUS,
 194         KEY_ESC,
 195         KEY_RED,
 196         KEY_GREEN,
 197         KEY_YELLOW,
 198         KEY_BLUE,
 199         KEY_OPTION,
 200         KEY_M,
 201         KEY_RADIO
 202 };
 203
 204 static void ttusb_dec_set_model(struct ttusb_dec *dec,
 205                                 enum ttusb_dec_model model);
 206
 207 static void ttusb_dec_handle_irq( struct urb *urb)
 208 {
 209         struct ttusb_dec * dec = urb->context;
 210         char *buffer = dec->irq_buffer;
 211         int retval;
 212
 213         switch(urb->status) {
 214                 case 0: /*success*/
 215                         break;
 216                 case -ECONNRESET:
 217                 case -ENOENT:
 218                 case -ESHUTDOWN:
 219                 case -ETIME:
 220                         /* this urb is dead, cleanup */
 221                         dprintk("%s:urb shutting down with status: %d\n",
 222                                         __func__, urb->status);
 223                         return;
 224                 default:
 225                         dprintk("%s:nonzero status received: %d\n",
 226                                         __func__,urb->status);
 227                         goto exit;
 228         }
 229
 230         if( (buffer[0] == 0x1) && (buffer[2] == 0x15) )  {
 231                 /* IR - Event */
 232                 /* this is an fact a bit too simple implementation;
 233                  * the box also reports a keyrepeat signal
 234                  * (with buffer[3] == 0x40) in an intervall of ~100ms.
 235                  * But to handle this correctly we had to imlemenent some
 236                  * kind of timer which signals a 'key up' event if no
 237                  * keyrepeat signal is recieved for lets say 200ms.
 238                  * this should/could be added later ...
 239                  * for now lets report each signal as a key down and up*/
 240                 dprintk("%s:rc signal:%d\n", __func__, buffer[4]);
 241                 input_report_key(dec->rc_input_dev, rc_keys[buffer[4] - 1], 1);
 242                 input_sync(dec->rc_input_dev);
 243                 input_report_key(dec->rc_input_dev, rc_keys[buffer[4] - 1], 0);
 244                 input_sync(dec->rc_input_dev);
 245         }
 246
 247 exit:   retval = usb_submit_urb(urb, GFP_ATOMIC);
 248         if(retval)
 249                 printk("%s - usb_commit_urb failed with result: %d\n",
 250                         __func__, retval);
 251 }
 252
 253 static u16 crc16(u16 crc, const u8 *buf, size_t len)
 254 {
 255         u16 tmp;
 256
 257         while (len--) {
 258                 crc ^= *buf++;
 259                 crc ^= (u8)crc >> 4;
 260                 tmp = (u8)crc;
 261                 crc ^= (tmp ^ (tmp << 1)) << 4;
 262         }
 263         return crc;
 264 }
 265
 266 static int ttusb_dec_send_command(struct ttusb_dec *dec, const u8 command,
 267                                   int param_length, const u8 params[],
 268                                   int *result_length, u8 cmd_result[])
 269 {
 270         int result, actual_len, i;
 271         u8 *b;
 272
 273         dprintk("%s\n", __func__);
 274
 275         b = kmalloc(COMMAND_PACKET_SIZE + 4, GFP_KERNEL);
 276         if (!b)
 277                 return -ENOMEM;
 278
 279         if ((result = mutex_lock_interruptible(&dec->usb_mutex))) {
 280                 kfree(b);
 281                 printk("%s: Failed to lock usb mutex.\n", __func__);
 282                 return result;
 283         }
 284
 285         b[0] = 0xaa;
 286         b[1] = ++dec->trans_count;
 287         b[2] = command;
 288         b[3] = param_length;
 289
 290         if (params)
 291                 memcpy(&b[4], params, param_length);
 292
 293         if (debug) {
 294                 printk("%s: command: ", __func__);
 295                 for (i = 0; i < param_length + 4; i++)
 296                         printk("0x%02X ", b[i]);
 297                 printk("\n");
 298         }
 299
 300         result = usb_bulk_msg(dec->udev, dec->command_pipe, b,
 301                               COMMAND_PACKET_SIZE + 4, &actual_len, 1000);
 302
 303         if (result) {
 304                 printk("%s: command bulk message failed: error %d\n",
 305                        __func__, result);
 306                 mutex_unlock(&dec->usb_mutex);
 307                 kfree(b);
 308                 return result;
 309         }
 310
 311         result = usb_bulk_msg(dec->udev, dec->result_pipe, b,
 312                               COMMAND_PACKET_SIZE + 4, &actual_len, 1000);
 313
 314         if (result) {
 315                 printk("%s: result bulk message failed: error %d\n",
 316                        __func__, result);
 317                 mutex_unlock(&dec->usb_mutex);
 318                 kfree(b);
 319                 return result;
 320         } else {
 321                 if (debug) {
 322                         printk("%s: result: ", __func__);
 323                         for (i = 0; i < actual_len; i++)
 324                                 printk("0x%02X ", b[i]);
 325                         printk("\n");
 326                 }
 327
 328                 if (result_length)
 329                         *result_length = b[3];
 330                 if (cmd_result && b[3] > 0)
 331                         memcpy(cmd_result, &b[4], b[3]);
 332
 333                 mutex_unlock(&dec->usb_mutex);
 334
 335                 kfree(b);
 336                 return 0;
 337         }
 338 }
 339
 340 static int ttusb_dec_get_stb_state (struct ttusb_dec *dec, unsigned int *mode,
 341                                     unsigned int *model, unsigned int *version)
 342 {
 343         u8 c[COMMAND_PACKET_SIZE];
 344         int c_length;
 345         int result;
 346         __be32 tmp;
 347
 348         dprintk("%s\n", __func__);
 349
 350         result = ttusb_dec_send_command(dec, 0x08, 0, NULL, &c_length, c);
 351         if (result)
 352                 return result;
 353
 354         if (c_length >= 0x0c) {
 355                 if (mode != NULL) {
 356                         memcpy(&tmp, c, 4);
 357                         *mode = ntohl(tmp);
 358                 }
 359                 if (model != NULL) {
 360                         memcpy(&tmp, &c[4], 4);
 361                         *model = ntohl(tmp);
 362                 }
 363                 if (version != NULL) {
 364                         memcpy(&tmp, &c[8], 4);
 365                         *version = ntohl(tmp);
 366                 }
 367                 return 0;
 368         } else {
 369                 return -1;
 370         }
 371 }
 372
 373 static int ttusb_dec_audio_pes2ts_cb(void *priv, unsigned char *data)
 374 {
 375         struct ttusb_dec *dec = priv;
 376
 377         dec->audio_filter->feed->cb.ts(data, 188, NULL, 0,
 378                                        &dec->audio_filter->feed->feed.ts,
 379                                        DMX_OK);
 380
 381         return 0;
 382 }
 383
 384 static int ttusb_dec_video_pes2ts_cb(void *priv, unsigned char *data)
 385 {
 386         struct ttusb_dec *dec = priv;
 387
 388         dec->video_filter->feed->cb.ts(data, 188, NULL, 0,
 389                                        &dec->video_filter->feed->feed.ts,
 390                                        DMX_OK);
 391
 392         return 0;
 393 }
 394
 395 static void ttusb_dec_set_pids(struct ttusb_dec *dec)
 396 {
 397         u8 b[] = { 0x00, 0x00, 0x00, 0x00,
 398                    0x00, 0x00, 0xff, 0xff,
 399                    0xff, 0xff, 0xff, 0xff };
 400
 401         __be16 pcr = htons(dec->pid[DMX_PES_PCR]);
 402         __be16 audio = htons(dec->pid[DMX_PES_AUDIO]);
 403         __be16 video = htons(dec->pid[DMX_PES_VIDEO]);
 404
 405         dprintk("%s\n", __func__);
 406
 407         memcpy(&b[0], &pcr, 2);
 408         memcpy(&b[2], &audio, 2);
 409         memcpy(&b[4], &video, 2);
 410
 411         ttusb_dec_send_command(dec, 0x50, sizeof(b), b, NULL, NULL);
 412
 413         dvb_filter_pes2ts_init(&dec->a_pes2ts, dec->pid[DMX_PES_AUDIO],
 414                                ttusb_dec_audio_pes2ts_cb, dec);
 415         dvb_filter_pes2ts_init(&dec->v_pes2ts, dec->pid[DMX_PES_VIDEO],
 416                                ttusb_dec_video_pes2ts_cb, dec);
 417         dec->v_pes_length = 0;
 418         dec->v_pes_postbytes = 0;
 419 }
 420
 421 static void ttusb_dec_process_pva(struct ttusb_dec *dec, u8 *pva, int length)
 422 {
 423         if (length < 8) {
 424                 printk("%s: packet too short - discarding\n", __func__);
 425                 return;
 426         }
 427
 428         if (length > 8 + MAX_PVA_LENGTH) {
 429                 printk("%s: packet too long - discarding\n", __func__);
 430                 return;
 431         }
 432
 433         switch (pva[2]) {
 434
 435         case 0x01: {            /* VideoStream */
 436                 int prebytes = pva[5] & 0x03;
 437                 int postbytes = (pva[5] & 0x0c) >> 2;
 438                 __be16 v_pes_payload_length;
 439
 440                 if (output_pva) {
 441                         dec->video_filter->feed->cb.ts(pva, length, NULL, 0,
 442                                 &dec->video_filter->feed->feed.ts, DMX_OK);
 443                         return;
 444                 }
 445
 446                 if (dec->v_pes_postbytes > 0 &&
 447                     dec->v_pes_postbytes == prebytes) {
 448                         memcpy(&dec->v_pes[dec->v_pes_length],
 449                                &pva[12], prebytes);
 450
 451                         dvb_filter_pes2ts(&dec->v_pes2ts, dec->v_pes,
 452                                           dec->v_pes_length + prebytes, 1);
 453                 }
 454
 455                 if (pva[5] & 0x10) {
 456                         dec->v_pes[7] = 0x80;
 457                         dec->v_pes[8] = 0x05;
 458
 459                         dec->v_pes[9] = 0x21 | ((pva[8] & 0xc0) >> 5);
 460                         dec->v_pes[10] = ((pva[8] & 0x3f) << 2) |
 461                                          ((pva[9] & 0xc0) >> 6);
 462                         dec->v_pes[11] = 0x01 |
 463                                          ((pva[9] & 0x3f) << 2) |
 464                                          ((pva[10] & 0x80) >> 6);
 465                         dec->v_pes[12] = ((pva[10] & 0x7f) << 1) |
 466                                          ((pva[11] & 0xc0) >> 7);
 467                         dec->v_pes[13] = 0x01 | ((pva[11] & 0x7f) << 1);
 468
 469                         memcpy(&dec->v_pes[14], &pva[12 + prebytes],
 470                                length - 12 - prebytes);
 471                         dec->v_pes_length = 14 + length - 12 - prebytes;
 472                 } else {
 473                         dec->v_pes[7] = 0x00;
 474                         dec->v_pes[8] = 0x00;
 475
 476                         memcpy(&dec->v_pes[9], &pva[8], length - 8);
 477                         dec->v_pes_length = 9 + length - 8;
 478                 }
 479
 480                 dec->v_pes_postbytes = postbytes;
 481
 482                 if (dec->v_pes[9 + dec->v_pes[8]] == 0x00 &&
 483                     dec->v_pes[10 + dec->v_pes[8]] == 0x00 &&
 484                     dec->v_pes[11 + dec->v_pes[8]] == 0x01)
 485                         dec->v_pes[6] = 0x84;
 486                 else
 487                         dec->v_pes[6] = 0x80;
 488
 489                 v_pes_payload_length = htons(dec->v_pes_length - 6 +
 490                                              postbytes);
 491                 memcpy(&dec->v_pes[4], &v_pes_payload_length, 2);
 492
 493                 if (postbytes == 0)
 494                         dvb_filter_pes2ts(&dec->v_pes2ts, dec->v_pes,
 495                                           dec->v_pes_length, 1);
 496
 497                 break;
 498         }
 499
 500         case 0x02:              /* MainAudioStream */
 501                 if (output_pva) {
 502                         dec->audio_filter->feed->cb.ts(pva, length, NULL, 0,
 503                                 &dec->audio_filter->feed->feed.ts, DMX_OK);
 504                         return;
 505                 }
 506
 507                 dvb_filter_pes2ts(&dec->a_pes2ts, &pva[8], length - 8,
 508                                   pva[5] & 0x10);
 509                 break;
 510
 511         default:
 512                 printk("%s: unknown PVA type: %02x.\n", __func__,
 513                        pva[2]);
 514                 break;
 515         }
 516 }
 517
 518 static void ttusb_dec_process_filter(struct ttusb_dec *dec, u8 *packet,
 519                                      int length)
 520 {
 521         struct list_head *item;
 522         struct filter_info *finfo;
 523         struct dvb_demux_filter *filter = NULL;
 524         unsigned long flags;
 525         u8 sid;
 526
 527         sid = packet[1];
 528         spin_lock_irqsave(&dec->filter_info_list_lock, flags);
 529         for (item = dec->filter_info_list.next; item != &dec->filter_info_list;
 530              item = item->next) {
 531                 finfo = list_entry(item, struct filter_info, filter_info_list);
 532                 if (finfo->stream_id == sid) {
 533                         filter = finfo->filter;
 534                         break;
 535                 }
 536         }
 537         spin_unlock_irqrestore(&dec->filter_info_list_lock, flags);
 538
 539         if (filter)
 540                 filter->feed->cb.sec(&packet[2], length - 2, NULL, 0,
 541                                      &filter->filter, DMX_OK);
 542 }
 543
 544 static void ttusb_dec_process_packet(struct ttusb_dec *dec)
 545 {
 546         int i;
 547         u16 csum = 0;
 548         u16 packet_id;
 549
 550         if (dec->packet_length % 2) {
 551                 printk("%s: odd sized packet - discarding\n", __func__);
 552                 return;
 553         }
 554
 555         for (i = 0; i < dec->packet_length; i += 2)
 556                 csum ^= ((dec->packet[i] << 8) + dec->packet[i + 1]);
 557
 558         if (csum) {
 559                 printk("%s: checksum failed - discarding\n", __func__);
 560                 return;
 561         }
 562
 563         packet_id = dec->packet[dec->packet_length - 4] << 8;
 564         packet_id += dec->packet[dec->packet_length - 3];
 565
 566         if ((packet_id != dec->next_packet_id) && dec->next_packet_id) {
 567                 printk("%s: warning: lost packets between %u and %u\n",
 568                        __func__, dec->next_packet_id - 1, packet_id);
 569         }
 570
 571         if (packet_id == 0xffff)
 572                 dec->next_packet_id = 0x8000;
 573         else
 574                 dec->next_packet_id = packet_id + 1;
 575
 576         switch (dec->packet_type) {
 577         case TTUSB_DEC_PACKET_PVA:
 578                 if (dec->pva_stream_count)
 579                         ttusb_dec_process_pva(dec, dec->packet,
 580                                               dec->packet_payload_length);
 581                 break;
 582
 583         case TTUSB_DEC_PACKET_SECTION:
 584                 if (dec->filter_stream_count)
 585                         ttusb_dec_process_filter(dec, dec->packet,
 586                                                  dec->packet_payload_length);
 587                 break;
 588
 589         case TTUSB_DEC_PACKET_EMPTY:
 590                 break;
 591         }
 592 }
 593
 594 static void swap_bytes(u8 *b, int length)
 595 {
 596         u8 c;
 597
 598         length -= length % 2;
 599         for (; length; b += 2, length -= 2) {
 600                 c = *b;
 601                 *b = *(b + 1);
 602                 *(b + 1) = c;
 603         }
 604 }
 605
 606 static void ttusb_dec_process_urb_frame(struct ttusb_dec *dec, u8 *b,
 607                                         int length)
 608 {
 609         swap_bytes(b, length);
 610
 611         while (length) {
 612                 switch (dec->packet_state) {
 613
 614                 case 0:
 615                 case 1:
 616                 case 2:
 617                         if (*b++ == 0xaa)
 618                                 dec->packet_state++;
 619                         else
 620                                 dec->packet_state = 0;
 621
 622                         length--;
 623                         break;
 624
 625                 case 3:
 626                         if (*b == 0x00) {
 627                                 dec->packet_state++;
 628                                 dec->packet_length = 0;
 629                         } else if (*b != 0xaa) {
 630                                 dec->packet_state = 0;
 631                         }
 632
 633                         b++;
 634                         length--;
 635                         break;
 636
 637                 case 4:
 638                         dec->packet[dec->packet_length++] = *b++;
 639
 640                         if (dec->packet_length == 2) {
 641                                 if (dec->packet[0] == 'A' &&
 642                                     dec->packet[1] == 'V') {
 643                                         dec->packet_type =
 644                                                 TTUSB_DEC_PACKET_PVA;
 645                                         dec->packet_state++;
 646                                 } else if (dec->packet[0] == 'S') {
 647                                         dec->packet_type =
 648                                                 TTUSB_DEC_PACKET_SECTION;
 649                                         dec->packet_state++;
 650                                 } else if (dec->packet[0] == 0x00) {
 651                                         dec->packet_type =
 652                                                 TTUSB_DEC_PACKET_EMPTY;
 653                                         dec->packet_payload_length = 2;
 654                                         dec->packet_state = 7;
 655                                 } else {
 656                                         printk("%s: unknown packet type: "
 657                                                "%02x%02x\n", __func__,
 658                                                dec->packet[0], dec->packet[1]);
 659                                         dec->packet_state = 0;
 660                                 }
 661                         }
 662
 663                         length--;
 664                         break;
 665
 666                 case 5:
 667                         dec->packet[dec->packet_length++] = *b++;
 668
 669                         if (dec->packet_type == TTUSB_DEC_PACKET_PVA &&
 670                             dec->packet_length == 8) {
 671                                 dec->packet_state++;
 672                                 dec->packet_payload_length = 8 +
 673                                         (dec->packet[6] << 8) +
 674                                         dec->packet[7];
 675                         } else if (dec->packet_type ==
 676                                         TTUSB_DEC_PACKET_SECTION &&
 677                                    dec->packet_length == 5) {
 678                                 dec->packet_state++;
 679                                 dec->packet_payload_length = 5 +
 680                                         ((dec->packet[3] & 0x0f) << 8) +
 681                                         dec->packet[4];
 682                         }
 683
 684                         length--;
 685                         break;
 686
 687                 case 6: {
 688                         int remainder = dec->packet_payload_length -
 689                                         dec->packet_length;
 690
 691                         if (length >= remainder) {
 692                                 memcpy(dec->packet + dec->packet_length,
 693                                        b, remainder);
 694                                 dec->packet_length += remainder;
 695                                 b += remainder;
 696                                 length -= remainder;
 697                                 dec->packet_state++;
 698                         } else {
 699                                 memcpy(&dec->packet[dec->packet_length],
 700                                        b, length);
 701                                 dec->packet_length += length;
 702                                 length = 0;
 703                         }
 704
 705                         break;
 706                 }
 707
 708                 case 7: {
 709                         int tail = 4;
 710
 711                         dec->packet[dec->packet_length++] = *b++;
 712
 713                         if (dec->packet_type == TTUSB_DEC_PACKET_SECTION &&
 714                             dec->packet_payload_length % 2)
 715                                 tail++;
 716
 717                         if (dec->packet_length ==
 718                             dec->packet_payload_length + tail) {
 719                                 ttusb_dec_process_packet(dec);
 720                                 dec->packet_state = 0;
 721                         }
 722
 723                         length--;
 724                         break;
 725                 }
 726
 727                 default:
 728                         printk("%s: illegal packet state encountered.\n",
 729                                __func__);
 730                         dec->packet_state = 0;
 731                 }
 732         }
 733 }
 734
 735 static void ttusb_dec_process_urb_frame_list(unsigned long data)
 736 {
 737         struct ttusb_dec *dec = (struct ttusb_dec *)data;
 738         struct list_head *item;
 739         struct urb_frame *frame;
 740         unsigned long flags;
 741
 742         while (1) {
 743                 spin_lock_irqsave(&dec->urb_frame_list_lock, flags);
 744                 if ((item = dec->urb_frame_list.next) != &dec->urb_frame_list) {
 745                         frame = list_entry(item, struct urb_frame,
 746                                            urb_frame_list);
 747                         list_del(&frame->urb_frame_list);
 748                 } else {
 749                         spin_unlock_irqrestore(&dec->urb_frame_list_lock,
 750                                                flags);
 751                         return;
 752                 }
 753                 spin_unlock_irqrestore(&dec->urb_frame_list_lock, flags);
 754
 755                 ttusb_dec_process_urb_frame(dec, frame->data, frame->length);
 756                 kfree(frame);
 757         }
 758 }
 759
 760 static void ttusb_dec_process_urb(struct urb *urb)
 761 {
 762         struct ttusb_dec *dec = urb->context;
 763
 764         if (!urb->status) {
 765                 int i;
 766
 767                 for (i = 0; i < FRAMES_PER_ISO_BUF; i++) {
 768                         struct usb_iso_packet_descriptor *d;
 769                         u8 *b;
 770                         int length;
 771                         struct urb_frame *frame;
 772
 773                         d = &urb->iso_frame_desc[i];
 774                         b = urb->transfer_buffer + d->offset;
 775                         length = d->actual_length;
 776
 777                         if ((frame = kmalloc(sizeof(struct urb_frame),
 778                                              GFP_ATOMIC))) {
 779                                 unsigned long flags;
 780
 781                                 memcpy(frame->data, b, length);
 782                                 frame->length = length;
 783
 784                                 spin_lock_irqsave(&dec->urb_frame_list_lock,
 785                                                      flags);
 786                                 list_add_tail(&frame->urb_frame_list,
 787                                               &dec->urb_frame_list);
 788                                 spin_unlock_irqrestore(&dec->urb_frame_list_lock,
 789                                                        flags);
 790
 791                                 tasklet_schedule(&dec->urb_tasklet);
 792                         }
 793                 }
 794         } else {
 795                  /* -ENOENT is expected when unlinking urbs */
 796                 if (urb->status != -ENOENT)
 797                         dprintk("%s: urb error: %d\n", __func__,
 798                                 urb->status);
 799         }
 800
 801         if (dec->iso_stream_count)
 802                 usb_submit_urb(urb, GFP_ATOMIC);
 803 }
 804
 805 static void ttusb_dec_setup_urbs(struct ttusb_dec *dec)
 806 {
 807         int i, j, buffer_offset = 0;
 808
 809         dprintk("%s\n", __func__);
 810
 811         for (i = 0; i < ISO_BUF_COUNT; i++) {
 812                 int frame_offset = 0;
 813                 struct urb *urb = dec->iso_urb[i];
 814
 815                 urb->dev = dec->udev;
 816                 urb->context = dec;
 817                 urb->complete = ttusb_dec_process_urb;
 818                 urb->pipe = dec->in_pipe;
 819                 urb->transfer_flags = URB_ISO_ASAP;
 820                 urb->interval = 1;
 821                 urb->number_of_packets = FRAMES_PER_ISO_BUF;
 822                 urb->transfer_buffer_length = ISO_FRAME_SIZE *
 823                                               FRAMES_PER_ISO_BUF;
 824                 urb->transfer_buffer = dec->iso_buffer + buffer_offset;
 825                 buffer_offset += ISO_FRAME_SIZE * FRAMES_PER_ISO_BUF;
 826
 827                 for (j = 0; j < FRAMES_PER_ISO_BUF; j++) {
 828                         urb->iso_frame_desc[j].offset = frame_offset;
 829                         urb->iso_frame_desc[j].length = ISO_FRAME_SIZE;
 830                         frame_offset += ISO_FRAME_SIZE;
 831                 }
 832         }
 833 }
 834
 835 static void ttusb_dec_stop_iso_xfer(struct ttusb_dec *dec)
 836 {
 837         int i;
 838
 839         dprintk("%s\n", __func__);
 840
 841         if (mutex_lock_interruptible(&dec->iso_mutex))
 842                 return;
 843
 844         dec->iso_stream_count--;
 845
 846         if (!dec->iso_stream_count) {
 847                 for (i = 0; i < ISO_BUF_COUNT; i++)
 848                         usb_kill_urb(dec->iso_urb[i]);
 849         }
 850
 851         mutex_unlock(&dec->iso_mutex);
 852 }
 853
 854 /* Setting the interface of the DEC tends to take down the USB communications
 855  * for a short period, so it's important not to call this function just before
 856  * trying to talk to it.
 857  */
 858 static int ttusb_dec_set_interface(struct ttusb_dec *dec,
 859                                    enum ttusb_dec_interface interface)
 860 {
 861         int result = 0;
 862         u8 b[] = { 0x05 };
 863
 864         if (interface != dec->interface) {
 865                 switch (interface) {
 866                 case TTUSB_DEC_INTERFACE_INITIAL:
 867                         result = usb_set_interface(dec->udev, 0, 0);
 868                         break;
 869                 case TTUSB_DEC_INTERFACE_IN:
 870                         result = ttusb_dec_send_command(dec, 0x80, sizeof(b),
 871                                                         b, NULL, NULL);
 872                         if (result)
 873                                 return result;
 874                         result = usb_set_interface(dec->udev, 0, 8);
 875                         break;
 876                 case TTUSB_DEC_INTERFACE_OUT:
 877                         result = usb_set_interface(dec->udev, 0, 1);
 878                         break;
 879                 }
 880
 881                 if (result)
 882                         return result;
 883
 884                 dec->interface = interface;
 885         }
 886
 887         return 0;
 888 }
 889
 890 static int ttusb_dec_start_iso_xfer(struct ttusb_dec *dec)
 891 {
 892         int i, result;
 893
 894         dprintk("%s\n", __func__);
 895
 896         if (mutex_lock_interruptible(&dec->iso_mutex))
 897                 return -EAGAIN;
 898
 899         if (!dec->iso_stream_count) {
 900                 ttusb_dec_setup_urbs(dec);
 901
 902                 dec->packet_state = 0;
 903                 dec->v_pes_postbytes = 0;
 904                 dec->next_packet_id = 0;
 905
 906                 for (i = 0; i < ISO_BUF_COUNT; i++) {
 907                         if ((result = usb_submit_urb(dec->iso_urb[i],
 908                                                      GFP_ATOMIC))) {
 909                                 printk("%s: failed urb submission %d: "
 910                                        "error %d\n", __func__, i, result);
 911
 912                                 while (i) {
 913                                         usb_kill_urb(dec->iso_urb[i - 1]);
 914                                         i--;
 915                                 }
 916
 917                                 mutex_unlock(&dec->iso_mutex);
 918                                 return result;
 919                         }
 920                 }
 921         }
 922
 923         dec->iso_stream_count++;
 924
 925         mutex_unlock(&dec->iso_mutex);
 926
 927         return 0;
 928 }
 929
 930 static int ttusb_dec_start_ts_feed(struct dvb_demux_feed *dvbdmxfeed)
 931 {
 932         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
 933         struct ttusb_dec *dec = dvbdmx->priv;
 934         u8 b0[] = { 0x05 };
 935         int result = 0;
 936
 937         dprintk("%s\n", __func__);
 938
 939         dprintk("  ts_type:");
 940
 941         if (dvbdmxfeed->ts_type & TS_DECODER)
 942                 dprintk(" TS_DECODER");
 943
 944         if (dvbdmxfeed->ts_type & TS_PACKET)
 945                 dprintk(" TS_PACKET");
 946
 947         if (dvbdmxfeed->ts_type & TS_PAYLOAD_ONLY)
 948                 dprintk(" TS_PAYLOAD_ONLY");
 949
 950         dprintk("\n");
 951
 952         switch (dvbdmxfeed->pes_type) {
 953
 954         case DMX_TS_PES_VIDEO:
 955                 dprintk("  pes_type: DMX_TS_PES_VIDEO\n");
 956                 dec->pid[DMX_PES_PCR] = dvbdmxfeed->pid;
 957                 dec->pid[DMX_PES_VIDEO] = dvbdmxfeed->pid;
 958                 dec->video_filter = dvbdmxfeed->filter;
 959                 ttusb_dec_set_pids(dec);
 960                 break;
 961
 962         case DMX_TS_PES_AUDIO:
 963                 dprintk("  pes_type: DMX_TS_PES_AUDIO\n");
 964                 dec->pid[DMX_PES_AUDIO] = dvbdmxfeed->pid;
 965                 dec->audio_filter = dvbdmxfeed->filter;
 966                 ttusb_dec_set_pids(dec);
 967                 break;
 968
 969         case DMX_TS_PES_TELETEXT:
 970                 dec->pid[DMX_PES_TELETEXT] = dvbdmxfeed->pid;
 971                 dprintk("  pes_type: DMX_TS_PES_TELETEXT(not supported)\n");
 972                 return -ENOSYS;
 973
 974         case DMX_TS_PES_PCR:
 975                 dprintk("  pes_type: DMX_TS_PES_PCR\n");
 976                 dec->pid[DMX_PES_PCR] = dvbdmxfeed->pid;
 977                 ttusb_dec_set_pids(dec);
 978                 break;
 979
 980         case DMX_TS_PES_OTHER:
 981                 dprintk("  pes_type: DMX_TS_PES_OTHER(not supported)\n");
 982                 return -ENOSYS;
 983
 984         default:
 985                 dprintk("  pes_type: unknown (%d)\n", dvbdmxfeed->pes_type);
 986                 return -EINVAL;
 987
 988         }
 989
 990         result = ttusb_dec_send_command(dec, 0x80, sizeof(b0), b0, NULL, NULL);
 991         if (result)
 992                 return result;
 993
 994         dec->pva_stream_count++;
 995         return ttusb_dec_start_iso_xfer(dec);
 996 }
 997
 998 static int ttusb_dec_start_sec_feed(struct dvb_demux_feed *dvbdmxfeed)
 999 {
1000         struct ttusb_dec *dec = dvbdmxfeed->demux->priv;
1001         u8 b0[] = { 0x00, 0x00, 0x00, 0x01,
1002                     0x00, 0x00, 0x00, 0x00,
1003                     0x00, 0x00, 0x00, 0x00,
1004                     0x00, 0x00, 0x00, 0x00,
1005                     0x00, 0xff, 0x00, 0x00,
1006                     0x00, 0x00, 0x00, 0x00,
1007                     0x00, 0x00, 0x00, 0x00,
1008                     0x00 };
1009         __be16 pid;
1010         u8 c[COMMAND_PACKET_SIZE];
1011         int c_length;
1012         int result;
1013         struct filter_info *finfo;
1014         unsigned long flags;
1015         u8 x = 1;
1016
1017         dprintk("%s\n", __func__);
1018
1019         pid = htons(dvbdmxfeed->pid);
1020         memcpy(&b0[0], &pid, 2);
1021         memcpy(&b0[4], &x, 1);
1022         memcpy(&b0[5], &dvbdmxfeed->filter->filter.filter_value[0], 1);
1023
1024         result = ttusb_dec_send_command(dec, 0x60, sizeof(b0), b0,
1025                                         &c_length, c);
1026
1027         if (!result) {
1028                 if (c_length == 2) {
1029                         if (!(finfo = kmalloc(sizeof(struct filter_info),
1030                                               GFP_ATOMIC)))
1031                                 return -ENOMEM;
1032
1033                         finfo->stream_id = c[1];
1034                         finfo->filter = dvbdmxfeed->filter;
1035
1036                         spin_lock_irqsave(&dec->filter_info_list_lock, flags);
1037                         list_add_tail(&finfo->filter_info_list,
1038                                       &dec->filter_info_list);
1039                         spin_unlock_irqrestore(&dec->filter_info_list_lock,
1040                                                flags);
1041
1042                         dvbdmxfeed->priv = finfo;
1043
1044                         dec->filter_stream_count++;
1045                         return ttusb_dec_start_iso_xfer(dec);
1046                 }
1047
1048                 return -EAGAIN;
1049         } else
1050                 return result;
1051 }
1052
1053 static int ttusb_dec_start_feed(struct dvb_demux_feed *dvbdmxfeed)
1054 {
1055         struct dvb_demux *dvbdmx = dvbdmxfeed->demux;
1056
1057         dprintk("%s\n", __func__);
1058
1059         if (!dvbdmx->dmx.frontend)
1060                 return -EINVAL;
1061
1062         dprintk("  pid: 0x%04X\n", dvbdmxfeed->pid);
1063
1064         switch (dvbdmxfeed->type) {
1065
1066         case DMX_TYPE_TS:
1067                 return ttusb_dec_start_ts_feed(dvbdmxfeed);
1068                 break;
1069
1070         case DMX_TYPE_SEC:
1071                 return ttusb_dec_start_sec_feed(dvbdmxfeed);
1072                 break;
1073
1074         default:
1075                 dprintk("  type: unknown (%d)\n", dvbdmxfeed->type);
1076                 return -EINVAL;
1077
1078         }
1079 }
1080
1081 static int ttusb_dec_stop_ts_feed(struct dvb_demux_feed *dvbdmxfeed)
1082 {
1083         struct ttusb_dec *dec = dvbdmxfeed->demux->priv;
1084         u8 b0[] = { 0x00 };
1085
1086         ttusb_dec_send_command(dec, 0x81, sizeof(b0), b0, NULL, NULL);
1087
1088         dec->pva_stream_count--;
1089
1090         ttusb_dec_stop_iso_xfer(dec);
1091
1092         return 0;
1093 }
1094
1095 static int ttusb_dec_stop_sec_feed(struct dvb_demux_feed *dvbdmxfeed)
1096 {
1097         struct ttusb_dec *dec = dvbdmxfeed->demux->priv;
1098         u8 b0[] = { 0x00, 0x00 };
1099         struct filter_info *finfo = (struct filter_info *)dvbdmxfeed->priv;
1100         unsigned long flags;
1101
1102         b0[1] = finfo->stream_id;
1103         spin_lock_irqsave(&dec->filter_info_list_lock, flags);
1104         list_del(&finfo->filter_info_list);
1105         spin_unlock_irqrestore(&dec->filter_info_list_lock, flags);
1106         kfree(finfo);
1107         ttusb_dec_send_command(dec, 0x62, sizeof(b0), b0, NULL, NULL);
1108
1109         dec->filter_stream_count--;
1110
1111         ttusb_dec_stop_iso_xfer(dec);
1112
1113         return 0;
1114 }
1115
1116 static int ttusb_dec_stop_feed(struct dvb_demux_feed *dvbdmxfeed)
1117 {
1118         dprintk("%s\n", __func__);
1119
1120         switch (dvbdmxfeed->type) {
1121         case DMX_TYPE_TS:
1122                 return ttusb_dec_stop_ts_feed(dvbdmxfeed);
1123                 break;
1124
1125         case DMX_TYPE_SEC:
1126                 return ttusb_dec_stop_sec_feed(dvbdmxfeed);
1127                 break;
1128         }
1129
1130         return 0;
1131 }
1132
1133 static void ttusb_dec_free_iso_urbs(struct ttusb_dec *dec)
1134 {
1135         int i;
1136
1137         dprintk("%s\n", __func__);
1138
1139         for (i = 0; i < ISO_BUF_COUNT; i++)
1140                 usb_free_urb(dec->iso_urb[i]);
1141
1142         pci_free_consistent(NULL,
1143                             ISO_FRAME_SIZE * (FRAMES_PER_ISO_BUF *
1144                                               ISO_BUF_COUNT),
1145                             dec->iso_buffer, dec->iso_dma_handle);
1146 }
1147
1148 static int ttusb_dec_alloc_iso_urbs(struct ttusb_dec *dec)
1149 {
1150         int i;
1151
1152         dprintk("%s\n", __func__);
1153
1154         dec->iso_buffer = pci_alloc_consistent(NULL,
1155                                                ISO_FRAME_SIZE *
1156                                                (FRAMES_PER_ISO_BUF *
1157                                                 ISO_BUF_COUNT),
1158                                                &dec->iso_dma_handle);
1159
1160         memset(dec->iso_buffer, 0,
1161                ISO_FRAME_SIZE * (FRAMES_PER_ISO_BUF * ISO_BUF_COUNT));
1162
1163         for (i = 0; i < ISO_BUF_COUNT; i++) {
1164                 struct urb *urb;
1165
1166                 if (!(urb = usb_alloc_urb(FRAMES_PER_ISO_BUF, GFP_ATOMIC))) {
1167                         ttusb_dec_free_iso_urbs(dec);
1168                         return -ENOMEM;
1169                 }
1170
1171                 dec->iso_urb[i] = urb;
1172         }
1173
1174         ttusb_dec_setup_urbs(dec);
1175
1176         return 0;
1177 }
1178
1179 static void ttusb_dec_init_tasklet(struct ttusb_dec *dec)
1180 {
1181         spin_lock_init(&dec->urb_frame_list_lock);
1182         INIT_LIST_HEAD(&dec->urb_frame_list);
1183         tasklet_init(&dec->urb_tasklet, ttusb_dec_process_urb_frame_list,
1184                      (unsigned long)dec);
1185 }
1186
1187 static int ttusb_init_rc( struct ttusb_dec *dec)
1188 {
1189         struct input_dev *input_dev;
1190         u8 b[] = { 0x00, 0x01 };
1191         int i;
1192         int err;
1193
1194         usb_make_path(dec->udev, dec->rc_phys, sizeof(dec->rc_phys));
1195         strlcpy(dec->rc_phys, "/input0", sizeof(dec->rc_phys));
1196
1197         input_dev = input_allocate_device();
1198         if (!input_dev)
1199                 return -ENOMEM;
1200
1201         input_dev->name = "ttusb_dec remote control";
1202         input_dev->phys = dec->rc_phys;
1203         input_dev->evbit[0] = BIT_MASK(EV_KEY);
1204         input_dev->keycodesize = sizeof(u16);
1205         input_dev->keycodemax = 0x1a;
1206         input_dev->keycode = rc_keys;
1207
1208         for (i = 0; i < ARRAY_SIZE(rc_keys); i++)
1209                   set_bit(rc_keys[i], input_dev->keybit);
1210
1211         err = input_register_device(input_dev);
1212         if (err) {
1213                 input_free_device(input_dev);
1214                 return err;
1215         }
1216
1217         dec->rc_input_dev = input_dev;
1218         if (usb_submit_urb(dec->irq_urb, GFP_KERNEL))
1219                 printk("%s: usb_submit_urb failed\n",__func__);
1220         /* enable irq pipe */
1221         ttusb_dec_send_command(dec,0xb0,sizeof(b),b,NULL,NULL);
1222
1223         return 0;
1224 }
1225
1226 static void ttusb_dec_init_v_pes(struct ttusb_dec *dec)
1227 {
1228         dprintk("%s\n", __func__);
1229
1230         dec->v_pes[0] = 0x00;
1231         dec->v_pes[1] = 0x00;
1232         dec->v_pes[2] = 0x01;
1233         dec->v_pes[3] = 0xe0;
1234 }
1235
1236 static int ttusb_dec_init_usb(struct ttusb_dec *dec)
1237 {
1238         dprintk("%s\n", __func__);
1239
1240         mutex_init(&dec->usb_mutex);
1241         mutex_init(&dec->iso_mutex);
1242
1243         dec->command_pipe = usb_sndbulkpipe(dec->udev, COMMAND_PIPE);
1244         dec->result_pipe = usb_rcvbulkpipe(dec->udev, RESULT_PIPE);
1245         dec->in_pipe = usb_rcvisocpipe(dec->udev, IN_PIPE);
1246         dec->out_pipe = usb_sndisocpipe(dec->udev, OUT_PIPE);
1247         dec->irq_pipe = usb_rcvintpipe(dec->udev, IRQ_PIPE);
1248
1249         if(enable_rc) {
1250                 dec->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1251                 if(!dec->irq_urb) {
1252                         return -ENOMEM;
1253                 }
1254                 dec->irq_buffer = usb_buffer_alloc(dec->udev,IRQ_PACKET_SIZE,
1255                                         GFP_ATOMIC, &dec->irq_dma_handle);
1256                 if(!dec->irq_buffer) {
1257                         return -ENOMEM;
1258                 }
1259                 usb_fill_int_urb(dec->irq_urb, dec->udev,dec->irq_pipe,
1260                                  dec->irq_buffer, IRQ_PACKET_SIZE,
1261                                  ttusb_dec_handle_irq, dec, 1);
1262                 dec->irq_urb->transfer_dma = dec->irq_dma_handle;
1263                 dec->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1264         }
1265
1266         return ttusb_dec_alloc_iso_urbs(dec);
1267 }
1268
1269 static int ttusb_dec_boot_dsp(struct ttusb_dec *dec)
1270 {
1271         int i, j, actual_len, result, size, trans_count;
1272         u8 b0[] = { 0x00, 0x00, 0x00, 0x00,
1273                     0x00, 0x00, 0x00, 0x00,
1274                     0x61, 0x00 };
1275         u8 b1[] = { 0x61 };
1276         u8 *b;
1277         char idstring[21];
1278         const u8 *firmware = NULL;
1279         size_t firmware_size = 0;
1280         u16 firmware_csum = 0;
1281         __be16 firmware_csum_ns;
1282         __be32 firmware_size_nl;
1283         u32 crc32_csum, crc32_check;
1284         __be32 tmp;
1285         const struct firmware *fw_entry = NULL;
1286
1287         dprintk("%s\n", __func__);
1288
1289         if (request_firmware(&fw_entry, dec->firmware_name, &dec->udev->dev)) {
1290                 printk(KERN_ERR "%s: Firmware (%s) unavailable.\n",
1291                        __func__, dec->firmware_name);
1292                 return 1;
1293         }
1294
1295         firmware = fw_entry->data;
1296         firmware_size = fw_entry->size;
1297
1298         if (firmware_size < 60) {
1299                 printk("%s: firmware size too small for DSP code (%zu < 60).\n",
1300                         __func__, firmware_size);
1301                 release_firmware(fw_entry);
1302                 return -1;
1303         }
1304
1305         /* a 32 bit checksum over the first 56 bytes of the DSP Code is stored
1306            at offset 56 of file, so use it to check if the firmware file is
1307            valid. */
1308         crc32_csum = crc32(~0L, firmware, 56) ^ ~0L;
1309         memcpy(&tmp, &firmware[56], 4);
1310         crc32_check = ntohl(tmp);
1311         if (crc32_csum != crc32_check) {
1312                 printk("%s: crc32 check of DSP code failed (calculated "
1313                        "0x%08x != 0x%08x in file), file invalid.\n",
1314                         __func__, crc32_csum, crc32_check);
1315                 release_firmware(fw_entry);
1316                 return -1;
1317         }
1318         memcpy(idstring, &firmware[36], 20);
1319         idstring[20] = '\0';
1320         printk(KERN_INFO "ttusb_dec: found DSP code \"%s\".\n", idstring);
1321
1322         firmware_size_nl = htonl(firmware_size);
1323         memcpy(b0, &firmware_size_nl, 4);
1324         firmware_csum = crc16(~0, firmware, firmware_size) ^ ~0;
1325         firmware_csum_ns = htons(firmware_csum);
1326         memcpy(&b0[6], &firmware_csum_ns, 2);
1327
1328         result = ttusb_dec_send_command(dec, 0x41, sizeof(b0), b0, NULL, NULL);
1329
1330         if (result) {
1331                 release_firmware(fw_entry);
1332                 return result;
1333         }
1334
1335         trans_count = 0;
1336         j = 0;
1337
1338         b = kmalloc(ARM_PACKET_SIZE, GFP_KERNEL);
1339         if (b == NULL) {
1340                 release_firmware(fw_entry);
1341                 return -ENOMEM;
1342         }
1343
1344         for (i = 0; i < firmware_size; i += COMMAND_PACKET_SIZE) {
1345                 size = firmware_size - i;
1346                 if (size > COMMAND_PACKET_SIZE)
1347                         size = COMMAND_PACKET_SIZE;
1348
1349                 b[j + 0] = 0xaa;
1350                 b[j + 1] = trans_count++;
1351                 b[j + 2] = 0xf0;
1352                 b[j + 3] = size;
1353                 memcpy(&b[j + 4], &firmware[i], size);
1354
1355                 j += COMMAND_PACKET_SIZE + 4;
1356
1357                 if (j >= ARM_PACKET_SIZE) {
1358                         result = usb_bulk_msg(dec->udev, dec->command_pipe, b,
1359                                               ARM_PACKET_SIZE, &actual_len,
1360                                               100);
1361                         j = 0;
1362                 } else if (size < COMMAND_PACKET_SIZE) {
1363                         result = usb_bulk_msg(dec->udev, dec->command_pipe, b,
1364                                               j - COMMAND_PACKET_SIZE + size,
1365                                               &actual_len, 100);
1366                 }
1367         }
1368
1369         result = ttusb_dec_send_command(dec, 0x43, sizeof(b1), b1, NULL, NULL);
1370
1371         release_firmware(fw_entry);
1372         kfree(b);
1373
1374         return result;
1375 }
1376
1377 static int ttusb_dec_init_stb(struct ttusb_dec *dec)
1378 {
1379         int result;
1380         unsigned int mode, model, version;
1381
1382         dprintk("%s\n", __func__);
1383
1384         result = ttusb_dec_get_stb_state(dec, &mode, &model, &version);
1385
1386         if (!result) {
1387                 if (!mode) {
1388                         if (version == 0xABCDEFAB)
1389                                 printk(KERN_INFO "ttusb_dec: no version "
1390                                        "info in Firmware\n");
1391                         else
1392                                 printk(KERN_INFO "ttusb_dec: Firmware "
1393                                        "%x.%02x%c%c\n",
1394                                        version >> 24, (version >> 16) & 0xff,
1395                                        (version >> 8) & 0xff, version & 0xff);
1396
1397                         result = ttusb_dec_boot_dsp(dec);
1398                         if (result)
1399                                 return result;
1400                         else
1401                                 return 1;
1402                 } else {
1403                         /* We can't trust the USB IDs that some firmwares
1404                            give the box */
1405                         switch (model) {
1406                         case 0x00070001:
1407                         case 0x00070008:
1408                         case 0x0007000c:
1409                                 ttusb_dec_set_model(dec, TTUSB_DEC3000S);
1410                                 break;
1411                         case 0x00070009:
1412                         case 0x00070013:
1413                                 ttusb_dec_set_model(dec, TTUSB_DEC2000T);
1414                                 break;
1415                         case 0x00070011:
1416                                 ttusb_dec_set_model(dec, TTUSB_DEC2540T);
1417                                 break;
1418                         default:
1419                                 printk(KERN_ERR "%s: unknown model returned "
1420                                        "by firmware (%08x) - please report\n",
1421                                        __func__, model);
1422                                 return -1;
1423                                 break;
1424                         }
1425
1426                         if (version >= 0x01770000)
1427                                 dec->can_playback = 1;
1428
1429                         return 0;
1430                 }
1431         }
1432         else
1433                 return result;
1434 }
1435
1436 static int ttusb_dec_init_dvb(struct ttusb_dec *dec)
1437 {
1438         int result;
1439
1440         dprintk("%s\n", __func__);
1441
1442         if ((result = dvb_register_adapter(&dec->adapter,
1443                                            dec->model_name, THIS_MODULE,
1444                                            &dec->udev->dev,
1445                                            adapter_nr)) < 0) {
1446                 printk("%s: dvb_register_adapter failed: error %d\n",
1447                        __func__, result);
1448
1449                 return result;
1450         }
1451
1452         dec->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
1453
1454         dec->demux.priv = (void *)dec;
1455         dec->demux.filternum = 31;
1456         dec->demux.feednum = 31;
1457         dec->demux.start_feed = ttusb_dec_start_feed;
1458         dec->demux.stop_feed = ttusb_dec_stop_feed;
1459         dec->demux.write_to_decoder = NULL;
1460
1461         if ((result = dvb_dmx_init(&dec->demux)) < 0) {
1462                 printk("%s: dvb_dmx_init failed: error %d\n", __func__,
1463                        result);
1464
1465                 dvb_unregister_adapter(&dec->adapter);
1466
1467                 return result;
1468         }
1469
1470         dec->dmxdev.filternum = 32;
1471         dec->dmxdev.demux = &dec->demux.dmx;
1472         dec->dmxdev.capabilities = 0;
1473
1474         if ((result = dvb_dmxdev_init(&dec->dmxdev, &dec->adapter)) < 0) {
1475                 printk("%s: dvb_dmxdev_init failed: error %d\n",
1476                        __func__, result);
1477
1478                 dvb_dmx_release(&dec->demux);
1479                 dvb_unregister_adapter(&dec->adapter);
1480
1481                 return result;
1482         }
1483
1484         dec->frontend.source = DMX_FRONTEND_0;
1485
1486         if ((result = dec->demux.dmx.add_frontend(&dec->demux.dmx,
1487                                                   &dec->frontend)) < 0) {
1488                 printk("%s: dvb_dmx_init failed: error %d\n", __func__,
1489                        result);
1490
1491                 dvb_dmxdev_release(&dec->dmxdev);
1492                 dvb_dmx_release(&dec->demux);
1493                 dvb_unregister_adapter(&dec->adapter);
1494
1495                 return result;
1496         }
1497
1498         if ((result = dec->demux.dmx.connect_frontend(&dec->demux.dmx,
1499                                                       &dec->frontend)) < 0) {
1500                 printk("%s: dvb_dmx_init failed: error %d\n", __func__,
1501                        result);
1502
1503                 dec->demux.dmx.remove_frontend(&dec->demux.dmx, &dec->frontend);
1504                 dvb_dmxdev_release(&dec->dmxdev);
1505                 dvb_dmx_release(&dec->demux);
1506                 dvb_unregister_adapter(&dec->adapter);
1507
1508                 return result;
1509         }
1510
1511         dvb_net_init(&dec->adapter, &dec->dvb_net, &dec->demux.dmx);
1512
1513         return 0;
1514 }
1515
1516 static void ttusb_dec_exit_dvb(struct ttusb_dec *dec)
1517 {
1518         dprintk("%s\n", __func__);
1519
1520         dvb_net_release(&dec->dvb_net);
1521         dec->demux.dmx.close(&dec->demux.dmx);
1522         dec->demux.dmx.remove_frontend(&dec->demux.dmx, &dec->frontend);
1523         dvb_dmxdev_release(&dec->dmxdev);
1524         dvb_dmx_release(&dec->demux);
1525         if (dec->fe) {
1526                 dvb_unregister_frontend(dec->fe);
1527                 if (dec->fe->ops.release)
1528                         dec->fe->ops.release(dec->fe);
1529         }
1530         dvb_unregister_adapter(&dec->adapter);
1531 }
1532
1533 static void ttusb_dec_exit_rc(struct ttusb_dec *dec)
1534 {
1535
1536         dprintk("%s\n", __func__);
1537         /* we have to check whether the irq URB is already submitted.
1538           * As the irq is submitted after the interface is changed,
1539           * this is the best method i figured out.
1540           * Any others?*/
1541         if (dec->interface == TTUSB_DEC_INTERFACE_IN)
1542                 usb_kill_urb(dec->irq_urb);
1543
1544         usb_free_urb(dec->irq_urb);
1545
1546         usb_buffer_free(dec->udev,IRQ_PACKET_SIZE,
1547                            dec->irq_buffer, dec->irq_dma_handle);
1548
1549         if (dec->rc_input_dev) {
1550                 input_unregister_device(dec->rc_input_dev);
1551                 dec->rc_input_dev = NULL;
1552         }
1553 }
1554
1555
1556 static void ttusb_dec_exit_usb(struct ttusb_dec *dec)
1557 {
1558         int i;
1559
1560         dprintk("%s\n", __func__);
1561
1562         dec->iso_stream_count = 0;
1563
1564         for (i = 0; i < ISO_BUF_COUNT; i++)
1565                 usb_kill_urb(dec->iso_urb[i]);
1566
1567         ttusb_dec_free_iso_urbs(dec);
1568 }
1569
1570 static void ttusb_dec_exit_tasklet(struct ttusb_dec *dec)
1571 {
1572         struct list_head *item;
1573         struct urb_frame *frame;
1574
1575         tasklet_kill(&dec->urb_tasklet);
1576
1577         while ((item = dec->urb_frame_list.next) != &dec->urb_frame_list) {
1578                 frame = list_entry(item, struct urb_frame, urb_frame_list);
1579                 list_del(&frame->urb_frame_list);
1580                 kfree(frame);
1581         }
1582 }
1583
1584 static void ttusb_dec_init_filters(struct ttusb_dec *dec)
1585 {
1586         INIT_LIST_HEAD(&dec->filter_info_list);
1587         spin_lock_init(&dec->filter_info_list_lock);
1588 }
1589
1590 static void ttusb_dec_exit_filters(struct ttusb_dec *dec)
1591 {
1592         struct list_head *item;
1593         struct filter_info *finfo;
1594
1595         while ((item = dec->filter_info_list.next) != &dec->filter_info_list) {
1596                 finfo = list_entry(item, struct filter_info, filter_info_list);
1597                 list_del(&finfo->filter_info_list);
1598                 kfree(finfo);
1599         }
1600 }
1601
1602 static int fe_send_command(struct dvb_frontend* fe, const u8 command,
1603                            int param_length, const u8 params[],
1604                            int *result_length, u8 cmd_result[])
1605 {
1606         struct ttusb_dec* dec = fe->dvb->priv;
1607         return ttusb_dec_send_command(dec, command, param_length, params, result_length, cmd_result);
1608 }
1609
1610 static struct ttusbdecfe_config fe_config = {
1611         .send_command = fe_send_command
1612 };
1613
1614 static int ttusb_dec_probe(struct usb_interface *intf,
1615                            const struct usb_device_id *id)
1616 {
1617         struct usb_device *udev;
1618         struct ttusb_dec *dec;
1619
1620         dprintk("%s\n", __func__);
1621
1622         udev = interface_to_usbdev(intf);
1623
1624         if (!(dec = kzalloc(sizeof(struct ttusb_dec), GFP_KERNEL))) {
1625                 printk("%s: couldn't allocate memory.\n", __func__);
1626                 return -ENOMEM;
1627         }
1628
1629         usb_set_intfdata(intf, (void *)dec);
1630
1631         switch (id->idProduct) {
1632         case 0x1006:
1633                 ttusb_dec_set_model(dec, TTUSB_DEC3000S);
1634                 break;
1635
1636         case 0x1008:
1637                 ttusb_dec_set_model(dec, TTUSB_DEC2000T);
1638                 break;
1639
1640         case 0x1009:
1641                 ttusb_dec_set_model(dec, TTUSB_DEC2540T);
1642                 break;
1643         }
1644
1645         dec->udev = udev;
1646
1647         if (ttusb_dec_init_usb(dec))
1648                 return 0;
1649         if (ttusb_dec_init_stb(dec)) {
1650                 ttusb_dec_exit_usb(dec);
1651                 return 0;
1652         }
1653         ttusb_dec_init_dvb(dec);
1654
1655         dec->adapter.priv = dec;
1656         switch (id->idProduct) {
1657         case 0x1006:
1658                 dec->fe = ttusbdecfe_dvbs_attach(&fe_config);
1659                 break;
1660
1661         case 0x1008:
1662         case 0x1009:
1663                 dec->fe = ttusbdecfe_dvbt_attach(&fe_config);
1664                 break;
1665         }
1666
1667         if (dec->fe == NULL) {
1668                 printk("dvb-ttusb-dec: A frontend driver was not found for device [%04x:%04x]\n",
1669                        le16_to_cpu(dec->udev->descriptor.idVendor),
1670                        le16_to_cpu(dec->udev->descriptor.idProduct));
1671         } else {
1672                 if (dvb_register_frontend(&dec->adapter, dec->fe)) {
1673                         printk("budget-ci: Frontend registration failed!\n");
1674                         if (dec->fe->ops.release)
1675                                 dec->fe->ops.release(dec->fe);
1676                         dec->fe = NULL;
1677                 }
1678         }
1679
1680         ttusb_dec_init_v_pes(dec);
1681         ttusb_dec_init_filters(dec);
1682         ttusb_dec_init_tasklet(dec);
1683
1684         dec->active = 1;
1685
1686         ttusb_dec_set_interface(dec, TTUSB_DEC_INTERFACE_IN);
1687
1688         if (enable_rc)
1689                 ttusb_init_rc(dec);
1690
1691         return 0;
1692 }
1693
1694 static void ttusb_dec_disconnect(struct usb_interface *intf)
1695 {
1696         struct ttusb_dec *dec = usb_get_intfdata(intf);
1697
1698         usb_set_intfdata(intf, NULL);
1699
1700         dprintk("%s\n", __func__);
1701
1702         if (dec->active) {
1703                 ttusb_dec_exit_tasklet(dec);
1704                 ttusb_dec_exit_filters(dec);
1705                 if(enable_rc)
1706                         ttusb_dec_exit_rc(dec);
1707                 ttusb_dec_exit_usb(dec);
1708                 ttusb_dec_exit_dvb(dec);
1709         }
1710
1711         kfree(dec);
1712 }
1713
1714 static void ttusb_dec_set_model(struct ttusb_dec *dec,
1715                                 enum ttusb_dec_model model)
1716 {
1717         dec->model = model;
1718
1719         switch (model) {
1720         case TTUSB_DEC2000T:
1721                 dec->model_name = "DEC2000-t";
1722                 dec->firmware_name = "dvb-ttusb-dec-2000t.fw";
1723                 break;
1724
1725         case TTUSB_DEC2540T:
1726                 dec->model_name = "DEC2540-t";
1727                 dec->firmware_name = "dvb-ttusb-dec-2540t.fw";
1728                 break;
1729
1730         case TTUSB_DEC3000S:
1731                 dec->model_name = "DEC3000-s";
1732                 dec->firmware_name = "dvb-ttusb-dec-3000s.fw";
1733                 break;
1734         }
1735 }
1736
1737 static struct usb_device_id ttusb_dec_table[] = {
1738         {USB_DEVICE(0x0b48, 0x1006)},   /* DEC3000-s */
1739         /*{USB_DEVICE(0x0b48, 0x1007)},    Unconfirmed */
1740         {USB_DEVICE(0x0b48, 0x1008)},   /* DEC2000-t */
1741         {USB_DEVICE(0x0b48, 0x1009)},   /* DEC2540-t */
1742         {}
1743 };
1744
1745 static struct usb_driver ttusb_dec_driver = {
1746         .name           = "ttusb-dec",
1747         .probe          = ttusb_dec_probe,
1748         .disconnect     = ttusb_dec_disconnect,
1749         .id_table       = ttusb_dec_table,
1750 };
1751
1752 static int __init ttusb_dec_init(void)
1753 {
1754         int result;
1755
1756         if ((result = usb_register(&ttusb_dec_driver)) < 0) {
1757                 printk("%s: initialisation failed: error %d.\n", __func__,
1758                        result);
1759                 return result;
1760         }
1761
1762         return 0;
1763 }
1764
1765 static void __exit ttusb_dec_exit(void)
1766 {
1767         usb_deregister(&ttusb_dec_driver);
1768 }
1769
1770 module_init(ttusb_dec_init);
1771 module_exit(ttusb_dec_exit);
1772
1773 MODULE_AUTHOR("Alex Woods <linux-dvb@giblets.org>");
1774 MODULE_DESCRIPTION(DRIVER_NAME);
1775 MODULE_LICENSE("GPL");
1776 MODULE_DEVICE_TABLE(usb, ttusb_dec_table);