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         if (!dec->iso_buffer) {
1161                 dprintk("%s: pci_alloc_consistent - not enough memory\n",
1162                         __func__);
1163                 return -ENOMEM;
1164         }
1165
1166         memset(dec->iso_buffer, 0,
1167                ISO_FRAME_SIZE * (FRAMES_PER_ISO_BUF * ISO_BUF_COUNT));
1168
1169         for (i = 0; i < ISO_BUF_COUNT; i++) {
1170                 struct urb *urb;
1171
1172                 if (!(urb = usb_alloc_urb(FRAMES_PER_ISO_BUF, GFP_ATOMIC))) {
1173                         ttusb_dec_free_iso_urbs(dec);
1174                         return -ENOMEM;
1175                 }
1176
1177                 dec->iso_urb[i] = urb;
1178         }
1179
1180         ttusb_dec_setup_urbs(dec);
1181
1182         return 0;
1183 }
1184
1185 static void ttusb_dec_init_tasklet(struct ttusb_dec *dec)
1186 {
1187         spin_lock_init(&dec->urb_frame_list_lock);
1188         INIT_LIST_HEAD(&dec->urb_frame_list);
1189         tasklet_init(&dec->urb_tasklet, ttusb_dec_process_urb_frame_list,
1190                      (unsigned long)dec);
1191 }
1192
1193 static int ttusb_init_rc( struct ttusb_dec *dec)
1194 {
1195         struct input_dev *input_dev;
1196         u8 b[] = { 0x00, 0x01 };
1197         int i;
1198         int err;
1199
1200         usb_make_path(dec->udev, dec->rc_phys, sizeof(dec->rc_phys));
1201         strlcpy(dec->rc_phys, "/input0", sizeof(dec->rc_phys));
1202
1203         input_dev = input_allocate_device();
1204         if (!input_dev)
1205                 return -ENOMEM;
1206
1207         input_dev->name = "ttusb_dec remote control";
1208         input_dev->phys = dec->rc_phys;
1209         input_dev->evbit[0] = BIT_MASK(EV_KEY);
1210         input_dev->keycodesize = sizeof(u16);
1211         input_dev->keycodemax = 0x1a;
1212         input_dev->keycode = rc_keys;
1213
1214         for (i = 0; i < ARRAY_SIZE(rc_keys); i++)
1215                   set_bit(rc_keys[i], input_dev->keybit);
1216
1217         err = input_register_device(input_dev);
1218         if (err) {
1219                 input_free_device(input_dev);
1220                 return err;
1221         }
1222
1223         dec->rc_input_dev = input_dev;
1224         if (usb_submit_urb(dec->irq_urb, GFP_KERNEL))
1225                 printk("%s: usb_submit_urb failed\n",__func__);
1226         /* enable irq pipe */
1227         ttusb_dec_send_command(dec,0xb0,sizeof(b),b,NULL,NULL);
1228
1229         return 0;
1230 }
1231
1232 static void ttusb_dec_init_v_pes(struct ttusb_dec *dec)
1233 {
1234         dprintk("%s\n", __func__);
1235
1236         dec->v_pes[0] = 0x00;
1237         dec->v_pes[1] = 0x00;
1238         dec->v_pes[2] = 0x01;
1239         dec->v_pes[3] = 0xe0;
1240 }
1241
1242 static int ttusb_dec_init_usb(struct ttusb_dec *dec)
1243 {
1244         dprintk("%s\n", __func__);
1245
1246         mutex_init(&dec->usb_mutex);
1247         mutex_init(&dec->iso_mutex);
1248
1249         dec->command_pipe = usb_sndbulkpipe(dec->udev, COMMAND_PIPE);
1250         dec->result_pipe = usb_rcvbulkpipe(dec->udev, RESULT_PIPE);
1251         dec->in_pipe = usb_rcvisocpipe(dec->udev, IN_PIPE);
1252         dec->out_pipe = usb_sndisocpipe(dec->udev, OUT_PIPE);
1253         dec->irq_pipe = usb_rcvintpipe(dec->udev, IRQ_PIPE);
1254
1255         if(enable_rc) {
1256                 dec->irq_urb = usb_alloc_urb(0, GFP_KERNEL);
1257                 if(!dec->irq_urb) {
1258                         return -ENOMEM;
1259                 }
1260                 dec->irq_buffer = usb_buffer_alloc(dec->udev,IRQ_PACKET_SIZE,
1261                                         GFP_ATOMIC, &dec->irq_dma_handle);
1262                 if(!dec->irq_buffer) {
1263                         usb_free_urb(dec->irq_urb);
1264                         return -ENOMEM;
1265                 }
1266                 usb_fill_int_urb(dec->irq_urb, dec->udev,dec->irq_pipe,
1267                                  dec->irq_buffer, IRQ_PACKET_SIZE,
1268                                  ttusb_dec_handle_irq, dec, 1);
1269                 dec->irq_urb->transfer_dma = dec->irq_dma_handle;
1270                 dec->irq_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
1271         }
1272
1273         return ttusb_dec_alloc_iso_urbs(dec);
1274 }
1275
1276 static int ttusb_dec_boot_dsp(struct ttusb_dec *dec)
1277 {
1278         int i, j, actual_len, result, size, trans_count;
1279         u8 b0[] = { 0x00, 0x00, 0x00, 0x00,
1280                     0x00, 0x00, 0x00, 0x00,
1281                     0x61, 0x00 };
1282         u8 b1[] = { 0x61 };
1283         u8 *b;
1284         char idstring[21];
1285         const u8 *firmware = NULL;
1286         size_t firmware_size = 0;
1287         u16 firmware_csum = 0;
1288         __be16 firmware_csum_ns;
1289         __be32 firmware_size_nl;
1290         u32 crc32_csum, crc32_check;
1291         __be32 tmp;
1292         const struct firmware *fw_entry = NULL;
1293
1294         dprintk("%s\n", __func__);
1295
1296         if (request_firmware(&fw_entry, dec->firmware_name, &dec->udev->dev)) {
1297                 printk(KERN_ERR "%s: Firmware (%s) unavailable.\n",
1298                        __func__, dec->firmware_name);
1299                 return 1;
1300         }
1301
1302         firmware = fw_entry->data;
1303         firmware_size = fw_entry->size;
1304
1305         if (firmware_size < 60) {
1306                 printk("%s: firmware size too small for DSP code (%zu < 60).\n",
1307                         __func__, firmware_size);
1308                 release_firmware(fw_entry);
1309                 return -1;
1310         }
1311
1312         /* a 32 bit checksum over the first 56 bytes of the DSP Code is stored
1313            at offset 56 of file, so use it to check if the firmware file is
1314            valid. */
1315         crc32_csum = crc32(~0L, firmware, 56) ^ ~0L;
1316         memcpy(&tmp, &firmware[56], 4);
1317         crc32_check = ntohl(tmp);
1318         if (crc32_csum != crc32_check) {
1319                 printk("%s: crc32 check of DSP code failed (calculated "
1320                        "0x%08x != 0x%08x in file), file invalid.\n",
1321                         __func__, crc32_csum, crc32_check);
1322                 release_firmware(fw_entry);
1323                 return -1;
1324         }
1325         memcpy(idstring, &firmware[36], 20);
1326         idstring[20] = '\0';
1327         printk(KERN_INFO "ttusb_dec: found DSP code \"%s\".\n", idstring);
1328
1329         firmware_size_nl = htonl(firmware_size);
1330         memcpy(b0, &firmware_size_nl, 4);
1331         firmware_csum = crc16(~0, firmware, firmware_size) ^ ~0;
1332         firmware_csum_ns = htons(firmware_csum);
1333         memcpy(&b0[6], &firmware_csum_ns, 2);
1334
1335         result = ttusb_dec_send_command(dec, 0x41, sizeof(b0), b0, NULL, NULL);
1336
1337         if (result) {
1338                 release_firmware(fw_entry);
1339                 return result;
1340         }
1341
1342         trans_count = 0;
1343         j = 0;
1344
1345         b = kmalloc(ARM_PACKET_SIZE, GFP_KERNEL);
1346         if (b == NULL) {
1347                 release_firmware(fw_entry);
1348                 return -ENOMEM;
1349         }
1350
1351         for (i = 0; i < firmware_size; i += COMMAND_PACKET_SIZE) {
1352                 size = firmware_size - i;
1353                 if (size > COMMAND_PACKET_SIZE)
1354                         size = COMMAND_PACKET_SIZE;
1355
1356                 b[j + 0] = 0xaa;
1357                 b[j + 1] = trans_count++;
1358                 b[j + 2] = 0xf0;
1359                 b[j + 3] = size;
1360                 memcpy(&b[j + 4], &firmware[i], size);
1361
1362                 j += COMMAND_PACKET_SIZE + 4;
1363
1364                 if (j >= ARM_PACKET_SIZE) {
1365                         result = usb_bulk_msg(dec->udev, dec->command_pipe, b,
1366                                               ARM_PACKET_SIZE, &actual_len,
1367                                               100);
1368                         j = 0;
1369                 } else if (size < COMMAND_PACKET_SIZE) {
1370                         result = usb_bulk_msg(dec->udev, dec->command_pipe, b,
1371                                               j - COMMAND_PACKET_SIZE + size,
1372                                               &actual_len, 100);
1373                 }
1374         }
1375
1376         result = ttusb_dec_send_command(dec, 0x43, sizeof(b1), b1, NULL, NULL);
1377
1378         release_firmware(fw_entry);
1379         kfree(b);
1380
1381         return result;
1382 }
1383
1384 static int ttusb_dec_init_stb(struct ttusb_dec *dec)
1385 {
1386         int result;
1387         unsigned int mode, model, version;
1388
1389         dprintk("%s\n", __func__);
1390
1391         result = ttusb_dec_get_stb_state(dec, &mode, &model, &version);
1392
1393         if (!result) {
1394                 if (!mode) {
1395                         if (version == 0xABCDEFAB)
1396                                 printk(KERN_INFO "ttusb_dec: no version "
1397                                        "info in Firmware\n");
1398                         else
1399                                 printk(KERN_INFO "ttusb_dec: Firmware "
1400                                        "%x.%02x%c%c\n",
1401                                        version >> 24, (version >> 16) & 0xff,
1402                                        (version >> 8) & 0xff, version & 0xff);
1403
1404                         result = ttusb_dec_boot_dsp(dec);
1405                         if (result)
1406                                 return result;
1407                         else
1408                                 return 1;
1409                 } else {
1410                         /* We can't trust the USB IDs that some firmwares
1411                            give the box */
1412                         switch (model) {
1413                         case 0x00070001:
1414                         case 0x00070008:
1415                         case 0x0007000c:
1416                                 ttusb_dec_set_model(dec, TTUSB_DEC3000S);
1417                                 break;
1418                         case 0x00070009:
1419                         case 0x00070013:
1420                                 ttusb_dec_set_model(dec, TTUSB_DEC2000T);
1421                                 break;
1422                         case 0x00070011:
1423                                 ttusb_dec_set_model(dec, TTUSB_DEC2540T);
1424                                 break;
1425                         default:
1426                                 printk(KERN_ERR "%s: unknown model returned "
1427                                        "by firmware (%08x) - please report\n",
1428                                        __func__, model);
1429                                 return -1;
1430                                 break;
1431                         }
1432
1433                         if (version >= 0x01770000)
1434                                 dec->can_playback = 1;
1435
1436                         return 0;
1437                 }
1438         }
1439         else
1440                 return result;
1441 }
1442
1443 static int ttusb_dec_init_dvb(struct ttusb_dec *dec)
1444 {
1445         int result;
1446
1447         dprintk("%s\n", __func__);
1448
1449         if ((result = dvb_register_adapter(&dec->adapter,
1450                                            dec->model_name, THIS_MODULE,
1451                                            &dec->udev->dev,
1452                                            adapter_nr)) < 0) {
1453                 printk("%s: dvb_register_adapter failed: error %d\n",
1454                        __func__, result);
1455
1456                 return result;
1457         }
1458
1459         dec->demux.dmx.capabilities = DMX_TS_FILTERING | DMX_SECTION_FILTERING;
1460
1461         dec->demux.priv = (void *)dec;
1462         dec->demux.filternum = 31;
1463         dec->demux.feednum = 31;
1464         dec->demux.start_feed = ttusb_dec_start_feed;
1465         dec->demux.stop_feed = ttusb_dec_stop_feed;
1466         dec->demux.write_to_decoder = NULL;
1467
1468         if ((result = dvb_dmx_init(&dec->demux)) < 0) {
1469                 printk("%s: dvb_dmx_init failed: error %d\n", __func__,
1470                        result);
1471
1472                 dvb_unregister_adapter(&dec->adapter);
1473
1474                 return result;
1475         }
1476
1477         dec->dmxdev.filternum = 32;
1478         dec->dmxdev.demux = &dec->demux.dmx;
1479         dec->dmxdev.capabilities = 0;
1480
1481         if ((result = dvb_dmxdev_init(&dec->dmxdev, &dec->adapter)) < 0) {
1482                 printk("%s: dvb_dmxdev_init failed: error %d\n",
1483                        __func__, result);
1484
1485                 dvb_dmx_release(&dec->demux);
1486                 dvb_unregister_adapter(&dec->adapter);
1487
1488                 return result;
1489         }
1490
1491         dec->frontend.source = DMX_FRONTEND_0;
1492
1493         if ((result = dec->demux.dmx.add_frontend(&dec->demux.dmx,
1494                                                   &dec->frontend)) < 0) {
1495                 printk("%s: dvb_dmx_init failed: error %d\n", __func__,
1496                        result);
1497
1498                 dvb_dmxdev_release(&dec->dmxdev);
1499                 dvb_dmx_release(&dec->demux);
1500                 dvb_unregister_adapter(&dec->adapter);
1501
1502                 return result;
1503         }
1504
1505         if ((result = dec->demux.dmx.connect_frontend(&dec->demux.dmx,
1506                                                       &dec->frontend)) < 0) {
1507                 printk("%s: dvb_dmx_init failed: error %d\n", __func__,
1508                        result);
1509
1510                 dec->demux.dmx.remove_frontend(&dec->demux.dmx, &dec->frontend);
1511                 dvb_dmxdev_release(&dec->dmxdev);
1512                 dvb_dmx_release(&dec->demux);
1513                 dvb_unregister_adapter(&dec->adapter);
1514
1515                 return result;
1516         }
1517
1518         dvb_net_init(&dec->adapter, &dec->dvb_net, &dec->demux.dmx);
1519
1520         return 0;
1521 }
1522
1523 static void ttusb_dec_exit_dvb(struct ttusb_dec *dec)
1524 {
1525         dprintk("%s\n", __func__);
1526
1527         dvb_net_release(&dec->dvb_net);
1528         dec->demux.dmx.close(&dec->demux.dmx);
1529         dec->demux.dmx.remove_frontend(&dec->demux.dmx, &dec->frontend);
1530         dvb_dmxdev_release(&dec->dmxdev);
1531         dvb_dmx_release(&dec->demux);
1532         if (dec->fe) {
1533                 dvb_unregister_frontend(dec->fe);
1534                 if (dec->fe->ops.release)
1535                         dec->fe->ops.release(dec->fe);
1536         }
1537         dvb_unregister_adapter(&dec->adapter);
1538 }
1539
1540 static void ttusb_dec_exit_rc(struct ttusb_dec *dec)
1541 {
1542
1543         dprintk("%s\n", __func__);
1544         /* we have to check whether the irq URB is already submitted.
1545           * As the irq is submitted after the interface is changed,
1546           * this is the best method i figured out.
1547           * Any others?*/
1548         if (dec->interface == TTUSB_DEC_INTERFACE_IN)
1549                 usb_kill_urb(dec->irq_urb);
1550
1551         usb_free_urb(dec->irq_urb);
1552
1553         usb_buffer_free(dec->udev,IRQ_PACKET_SIZE,
1554                            dec->irq_buffer, dec->irq_dma_handle);
1555
1556         if (dec->rc_input_dev) {
1557                 input_unregister_device(dec->rc_input_dev);
1558                 dec->rc_input_dev = NULL;
1559         }
1560 }
1561
1562
1563 static void ttusb_dec_exit_usb(struct ttusb_dec *dec)
1564 {
1565         int i;
1566
1567         dprintk("%s\n", __func__);
1568
1569         dec->iso_stream_count = 0;
1570
1571         for (i = 0; i < ISO_BUF_COUNT; i++)
1572                 usb_kill_urb(dec->iso_urb[i]);
1573
1574         ttusb_dec_free_iso_urbs(dec);
1575 }
1576
1577 static void ttusb_dec_exit_tasklet(struct ttusb_dec *dec)
1578 {
1579         struct list_head *item;
1580         struct urb_frame *frame;
1581
1582         tasklet_kill(&dec->urb_tasklet);
1583
1584         while ((item = dec->urb_frame_list.next) != &dec->urb_frame_list) {
1585                 frame = list_entry(item, struct urb_frame, urb_frame_list);
1586                 list_del(&frame->urb_frame_list);
1587                 kfree(frame);
1588         }
1589 }
1590
1591 static void ttusb_dec_init_filters(struct ttusb_dec *dec)
1592 {
1593         INIT_LIST_HEAD(&dec->filter_info_list);
1594         spin_lock_init(&dec->filter_info_list_lock);
1595 }
1596
1597 static void ttusb_dec_exit_filters(struct ttusb_dec *dec)
1598 {
1599         struct list_head *item;
1600         struct filter_info *finfo;
1601
1602         while ((item = dec->filter_info_list.next) != &dec->filter_info_list) {
1603                 finfo = list_entry(item, struct filter_info, filter_info_list);
1604                 list_del(&finfo->filter_info_list);
1605                 kfree(finfo);
1606         }
1607 }
1608
1609 static int fe_send_command(struct dvb_frontend* fe, const u8 command,
1610                            int param_length, const u8 params[],
1611                            int *result_length, u8 cmd_result[])
1612 {
1613         struct ttusb_dec* dec = fe->dvb->priv;
1614         return ttusb_dec_send_command(dec, command, param_length, params, result_length, cmd_result);
1615 }
1616
1617 static struct ttusbdecfe_config fe_config = {
1618         .send_command = fe_send_command
1619 };
1620
1621 static int ttusb_dec_probe(struct usb_interface *intf,
1622                            const struct usb_device_id *id)
1623 {
1624         struct usb_device *udev;
1625         struct ttusb_dec *dec;
1626
1627         dprintk("%s\n", __func__);
1628
1629         udev = interface_to_usbdev(intf);
1630
1631         if (!(dec = kzalloc(sizeof(struct ttusb_dec), GFP_KERNEL))) {
1632                 printk("%s: couldn't allocate memory.\n", __func__);
1633                 return -ENOMEM;
1634         }
1635
1636         usb_set_intfdata(intf, (void *)dec);
1637
1638         switch (id->idProduct) {
1639         case 0x1006:
1640                 ttusb_dec_set_model(dec, TTUSB_DEC3000S);
1641                 break;
1642
1643         case 0x1008:
1644                 ttusb_dec_set_model(dec, TTUSB_DEC2000T);
1645                 break;
1646
1647         case 0x1009:
1648                 ttusb_dec_set_model(dec, TTUSB_DEC2540T);
1649                 break;
1650         }
1651
1652         dec->udev = udev;
1653
1654         if (ttusb_dec_init_usb(dec))
1655                 return 0;
1656         if (ttusb_dec_init_stb(dec)) {
1657                 ttusb_dec_exit_usb(dec);
1658                 return 0;
1659         }
1660         ttusb_dec_init_dvb(dec);
1661
1662         dec->adapter.priv = dec;
1663         switch (id->idProduct) {
1664         case 0x1006:
1665                 dec->fe = ttusbdecfe_dvbs_attach(&fe_config);
1666                 break;
1667
1668         case 0x1008:
1669         case 0x1009:
1670                 dec->fe = ttusbdecfe_dvbt_attach(&fe_config);
1671                 break;
1672         }
1673
1674         if (dec->fe == NULL) {
1675                 printk("dvb-ttusb-dec: A frontend driver was not found for device [%04x:%04x]\n",
1676                        le16_to_cpu(dec->udev->descriptor.idVendor),
1677                        le16_to_cpu(dec->udev->descriptor.idProduct));
1678         } else {
1679                 if (dvb_register_frontend(&dec->adapter, dec->fe)) {
1680                         printk("budget-ci: Frontend registration failed!\n");
1681                         if (dec->fe->ops.release)
1682                                 dec->fe->ops.release(dec->fe);
1683                         dec->fe = NULL;
1684                 }
1685         }
1686
1687         ttusb_dec_init_v_pes(dec);
1688         ttusb_dec_init_filters(dec);
1689         ttusb_dec_init_tasklet(dec);
1690
1691         dec->active = 1;
1692
1693         ttusb_dec_set_interface(dec, TTUSB_DEC_INTERFACE_IN);
1694
1695         if (enable_rc)
1696                 ttusb_init_rc(dec);
1697
1698         return 0;
1699 }
1700
1701 static void ttusb_dec_disconnect(struct usb_interface *intf)
1702 {
1703         struct ttusb_dec *dec = usb_get_intfdata(intf);
1704
1705         usb_set_intfdata(intf, NULL);
1706
1707         dprintk("%s\n", __func__);
1708
1709         if (dec->active) {
1710                 ttusb_dec_exit_tasklet(dec);
1711                 ttusb_dec_exit_filters(dec);
1712                 if(enable_rc)
1713                         ttusb_dec_exit_rc(dec);
1714                 ttusb_dec_exit_usb(dec);
1715                 ttusb_dec_exit_dvb(dec);
1716         }
1717
1718         kfree(dec);
1719 }
1720
1721 static void ttusb_dec_set_model(struct ttusb_dec *dec,
1722                                 enum ttusb_dec_model model)
1723 {
1724         dec->model = model;
1725
1726         switch (model) {
1727         case TTUSB_DEC2000T:
1728                 dec->model_name = "DEC2000-t";
1729                 dec->firmware_name = "dvb-ttusb-dec-2000t.fw";
1730                 break;
1731
1732         case TTUSB_DEC2540T:
1733                 dec->model_name = "DEC2540-t";
1734                 dec->firmware_name = "dvb-ttusb-dec-2540t.fw";
1735                 break;
1736
1737         case TTUSB_DEC3000S:
1738                 dec->model_name = "DEC3000-s";
1739                 dec->firmware_name = "dvb-ttusb-dec-3000s.fw";
1740                 break;
1741         }
1742 }
1743
1744 static struct usb_device_id ttusb_dec_table[] = {
1745         {USB_DEVICE(0x0b48, 0x1006)},   /* DEC3000-s */
1746         /*{USB_DEVICE(0x0b48, 0x1007)},    Unconfirmed */
1747         {USB_DEVICE(0x0b48, 0x1008)},   /* DEC2000-t */
1748         {USB_DEVICE(0x0b48, 0x1009)},   /* DEC2540-t */
1749         {}
1750 };
1751
1752 static struct usb_driver ttusb_dec_driver = {
1753         .name           = "ttusb-dec",
1754         .probe          = ttusb_dec_probe,
1755         .disconnect     = ttusb_dec_disconnect,
1756         .id_table       = ttusb_dec_table,
1757 };
1758
1759 static int __init ttusb_dec_init(void)
1760 {
1761         int result;
1762
1763         if ((result = usb_register(&ttusb_dec_driver)) < 0) {
1764                 printk("%s: initialisation failed: error %d.\n", __func__,
1765                        result);
1766                 return result;
1767         }
1768
1769         return 0;
1770 }
1771
1772 static void __exit ttusb_dec_exit(void)
1773 {
1774         usb_deregister(&ttusb_dec_driver);
1775 }
1776
1777 module_init(ttusb_dec_init);
1778 module_exit(ttusb_dec_exit);
1779
1780 MODULE_AUTHOR("Alex Woods <linux-dvb@giblets.org>");
1781 MODULE_DESCRIPTION(DRIVER_NAME);
1782 MODULE_LICENSE("GPL");
1783 MODULE_DEVICE_TABLE(usb, ttusb_dec_table);