SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/staging/go7007/go7007-driver.c

   1 /*
   2  * Copyright (C) 2005-2006 Micronas USA Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License (Version 2) as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software Foundation,
  15  * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/delay.h>
  21 #include <linux/sched.h>
  22 #include <linux/spinlock.h>
  23 #include <linux/unistd.h>
  24 #include <linux/time.h>
  25 #include <linux/mm.h>
  26 #include <linux/vmalloc.h>
  27 #include <linux/device.h>
  28 #include <linux/i2c.h>
  29 #include <linux/firmware.h>
  30 #include <linux/mutex.h>
  31 #include <linux/uaccess.h>
  32 #include <asm/system.h>
  33 #include <linux/videodev2.h>
  34 #include <media/tuner.h>
  35 #include <media/v4l2-common.h>
  36
  37 #include "go7007-priv.h"
  38 #include "wis-i2c.h"
  39
  40 /*
  41  * Wait for an interrupt to be delivered from the GO7007SB and return
  42  * the associated value and data.
  43  *
  44  * Must be called with the hw_lock held.
  45  */
  46 int go7007_read_interrupt(struct go7007 *go, u16 *value, u16 *data)
  47 {
  48         go->interrupt_available = 0;
  49         go->hpi_ops->read_interrupt(go);
  50         if (wait_event_timeout(go->interrupt_waitq,
  51                                 go->interrupt_available, 5*HZ) < 0) {
  52                 v4l2_err(go->video_dev, "timeout waiting for read interrupt\n");
  53                 return -1;
  54         }
  55         if (!go->interrupt_available)
  56                 return -1;
  57         go->interrupt_available = 0;
  58         *value = go->interrupt_value & 0xfffe;
  59         *data = go->interrupt_data;
  60         return 0;
  61 }
  62 EXPORT_SYMBOL(go7007_read_interrupt);
  63
  64 /*
  65  * Read a register/address on the GO7007SB.
  66  *
  67  * Must be called with the hw_lock held.
  68  */
  69 int go7007_read_addr(struct go7007 *go, u16 addr, u16 *data)
  70 {
  71         int count = 100;
  72         u16 value;
  73
  74         if (go7007_write_interrupt(go, 0x0010, addr) < 0)
  75                 return -EIO;
  76         while (count-- > 0) {
  77                 if (go7007_read_interrupt(go, &value, data) == 0 &&
  78                                 value == 0xa000)
  79                         return 0;
  80         }
  81         return -EIO;
  82 }
  83 EXPORT_SYMBOL(go7007_read_addr);
  84
  85 /*
  86  * Send the boot firmware to the encoder, which just wakes it up and lets
  87  * us talk to the GPIO pins and on-board I2C adapter.
  88  *
  89  * Must be called with the hw_lock held.
  90  */
  91 static int go7007_load_encoder(struct go7007 *go)
  92 {
  93         const struct firmware *fw_entry;
  94         char fw_name[] = "go7007fw.bin";
  95         void *bounce;
  96         int fw_len, rv = 0;
  97         u16 intr_val, intr_data;
  98
  99         if (request_firmware(&fw_entry, fw_name, go->dev)) {
 100                 v4l2_err(go, "unable to load firmware from file "
 101                         "\"%s\"\n", fw_name);
 102                 return -1;
 103         }
 104         if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) {
 105                 v4l2_err(go, "file \"%s\" does not appear to be "
 106                                 "go7007 firmware\n", fw_name);
 107                 release_firmware(fw_entry);
 108                 return -1;
 109         }
 110         fw_len = fw_entry->size - 16;
 111         bounce = kmalloc(fw_len, GFP_KERNEL);
 112         if (bounce == NULL) {
 113                 v4l2_err(go, "unable to allocate %d bytes for "
 114                                 "firmware transfer\n", fw_len);
 115                 release_firmware(fw_entry);
 116                 return -1;
 117         }
 118         memcpy(bounce, fw_entry->data + 16, fw_len);
 119         release_firmware(fw_entry);
 120         if (go7007_interface_reset(go) < 0 ||
 121                         go7007_send_firmware(go, bounce, fw_len) < 0 ||
 122                         go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
 123                         (intr_val & ~0x1) != 0x5a5a) {
 124                 v4l2_err(go, "error transferring firmware\n");
 125                 rv = -1;
 126         }
 127         kfree(bounce);
 128         return rv;
 129 }
 130
 131 /*
 132  * Boot the encoder and register the I2C adapter if requested.  Do the
 133  * minimum initialization necessary, since the board-specific code may
 134  * still need to probe the board ID.
 135  *
 136  * Must NOT be called with the hw_lock held.
 137  */
 138 int go7007_boot_encoder(struct go7007 *go, int init_i2c)
 139 {
 140         int ret;
 141
 142         mutex_lock(&go->hw_lock);
 143         ret = go7007_load_encoder(go);
 144         mutex_unlock(&go->hw_lock);
 145         if (ret < 0)
 146                 return -1;
 147         if (!init_i2c)
 148                 return 0;
 149         if (go7007_i2c_init(go) < 0)
 150                 return -1;
 151         go->i2c_adapter_online = 1;
 152         return 0;
 153 }
 154 EXPORT_SYMBOL(go7007_boot_encoder);
 155
 156 /*
 157  * Configure any hardware-related registers in the GO7007, such as GPIO
 158  * pins and bus parameters, which are board-specific.  This assumes
 159  * the boot firmware has already been downloaded.
 160  *
 161  * Must be called with the hw_lock held.
 162  */
 163 static int go7007_init_encoder(struct go7007 *go)
 164 {
 165         if (go->board_info->audio_flags & GO7007_AUDIO_I2S_MASTER) {
 166                 go7007_write_addr(go, 0x1000, 0x0811);
 167                 go7007_write_addr(go, 0x1000, 0x0c11);
 168         }
 169         if (go->board_id == GO7007_BOARDID_MATRIX_REV) {
 170                 /* Set GPIO pin 0 to be an output (audio clock control) */
 171                 go7007_write_addr(go, 0x3c82, 0x0001);
 172                 go7007_write_addr(go, 0x3c80, 0x00fe);
 173         }
 174         return 0;
 175 }
 176
 177 /*
 178  * Send the boot firmware to the GO7007 and configure the registers.  This
 179  * is the only way to stop the encoder once it has started streaming video.
 180  *
 181  * Must be called with the hw_lock held.
 182  */
 183 int go7007_reset_encoder(struct go7007 *go)
 184 {
 185         if (go7007_load_encoder(go) < 0)
 186                 return -1;
 187         return go7007_init_encoder(go);
 188 }
 189
 190 /*
 191  * Attempt to instantiate an I2C client by ID, probably loading a module.
 192  */
 193 static int init_i2c_module(struct i2c_adapter *adapter, const char *type,
 194                            int id, int addr)
 195 {
 196         struct i2c_board_info info;
 197         char *modname;
 198
 199         switch (id) {
 200         case I2C_DRIVERID_WIS_SAA7115:
 201                 modname = "wis-saa7115";
 202                 break;
 203         case I2C_DRIVERID_WIS_SAA7113:
 204                 modname = "wis-saa7113";
 205                 break;
 206         case I2C_DRIVERID_WIS_UDA1342:
 207                 modname = "wis-uda1342";
 208                 break;
 209         case I2C_DRIVERID_WIS_SONY_TUNER:
 210                 modname = "wis-sony-tuner";
 211                 break;
 212         case I2C_DRIVERID_WIS_TW9903:
 213                 modname = "wis-tw9903";
 214                 break;
 215         case I2C_DRIVERID_WIS_TW2804:
 216                 modname = "wis-tw2804";
 217                 break;
 218         case I2C_DRIVERID_WIS_OV7640:
 219                 modname = "wis-ov7640";
 220                 break;
 221         case I2C_DRIVERID_S2250:
 222                 modname = "s2250-board";
 223                 break;
 224         default:
 225                 modname = NULL;
 226                 break;
 227         }
 228         if (modname != NULL)
 229                 request_module(modname);
 230
 231         memset(&info, 0, sizeof(struct i2c_board_info));
 232         info.addr = addr;
 233         strlcpy(info.type, type, I2C_NAME_SIZE);
 234         if (!i2c_new_device(adapter, &info))
 235                 return 0;
 236         if (modname != NULL)
 237                 printk(KERN_INFO
 238                         "go7007: probing for module %s failed\n", modname);
 239         else
 240                 printk(KERN_INFO
 241                         "go7007: sensor %u seems to be unsupported!\n", id);
 242         return -1;
 243 }
 244
 245 /*
 246  * Finalize the GO7007 hardware setup, register the on-board I2C adapter
 247  * (if used on this board), load the I2C client driver for the sensor
 248  * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
 249  * interfaces.
 250  *
 251  * Must NOT be called with the hw_lock held.
 252  */
 253 int go7007_register_encoder(struct go7007 *go)
 254 {
 255         int i, ret;
 256
 257         printk(KERN_INFO "go7007: registering new %s\n", go->name);
 258
 259         mutex_lock(&go->hw_lock);
 260         ret = go7007_init_encoder(go);
 261         mutex_unlock(&go->hw_lock);
 262         if (ret < 0)
 263                 return -1;
 264
 265         if (!go->i2c_adapter_online &&
 266                         go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
 267                 if (go7007_i2c_init(go) < 0)
 268                         return -1;
 269                 go->i2c_adapter_online = 1;
 270         }
 271         if (go->i2c_adapter_online) {
 272                 for (i = 0; i < go->board_info->num_i2c_devs; ++i)
 273                         init_i2c_module(&go->i2c_adapter,
 274                                         go->board_info->i2c_devs[i].type,
 275                                         go->board_info->i2c_devs[i].id,
 276                                         go->board_info->i2c_devs[i].addr);
 277                 if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
 278                         i2c_clients_command(&go->i2c_adapter,
 279                                 DECODER_SET_CHANNEL, &go->channel_number);
 280         }
 281         if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
 282                 go->audio_enabled = 1;
 283                 go7007_snd_init(go);
 284         }
 285         return go7007_v4l2_init(go);
 286 }
 287 EXPORT_SYMBOL(go7007_register_encoder);
 288
 289 /*
 290  * Send the encode firmware to the encoder, which will cause it
 291  * to immediately start delivering the video and audio streams.
 292  *
 293  * Must be called with the hw_lock held.
 294  */
 295 int go7007_start_encoder(struct go7007 *go)
 296 {
 297         u8 *fw;
 298         int fw_len, rv = 0, i;
 299         u16 intr_val, intr_data;
 300
 301         go->modet_enable = 0;
 302         if (!go->dvd_mode)
 303                 for (i = 0; i < 4; ++i) {
 304                         if (go->modet[i].enable) {
 305                                 go->modet_enable = 1;
 306                                 continue;
 307                         }
 308                         go->modet[i].pixel_threshold = 32767;
 309                         go->modet[i].motion_threshold = 32767;
 310                         go->modet[i].mb_threshold = 32767;
 311                 }
 312
 313         if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
 314                 return -1;
 315
 316         if (go7007_send_firmware(go, fw, fw_len) < 0 ||
 317                         go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
 318                 v4l2_err(go->video_dev, "error transferring firmware\n");
 319                 rv = -1;
 320                 goto start_error;
 321         }
 322
 323         go->state = STATE_DATA;
 324         go->parse_length = 0;
 325         go->seen_frame = 0;
 326         if (go7007_stream_start(go) < 0) {
 327                 v4l2_err(go->video_dev, "error starting stream transfer\n");
 328                 rv = -1;
 329                 goto start_error;
 330         }
 331
 332 start_error:
 333         kfree(fw);
 334         return rv;
 335 }
 336
 337 /*
 338  * Store a byte in the current video buffer, if there is one.
 339  */
 340 static inline void store_byte(struct go7007_buffer *gobuf, u8 byte)
 341 {
 342         if (gobuf != NULL && gobuf->bytesused < GO7007_BUF_SIZE) {
 343                 unsigned int pgidx = gobuf->offset >> PAGE_SHIFT;
 344                 unsigned int pgoff = gobuf->offset & ~PAGE_MASK;
 345
 346                 *((u8 *)page_address(gobuf->pages[pgidx]) + pgoff) = byte;
 347                 ++gobuf->offset;
 348                 ++gobuf->bytesused;
 349         }
 350 }
 351
 352 /*
 353  * Deliver the last video buffer and get a new one to start writing to.
 354  */
 355 static void frame_boundary(struct go7007 *go)
 356 {
 357         struct go7007_buffer *gobuf;
 358         int i;
 359
 360         if (go->active_buf) {
 361                 if (go->active_buf->modet_active) {
 362                         if (go->active_buf->bytesused + 216 < GO7007_BUF_SIZE) {
 363                                 for (i = 0; i < 216; ++i)
 364                                         store_byte(go->active_buf,
 365                                                         go->active_map[i]);
 366                                 go->active_buf->bytesused -= 216;
 367                         } else
 368                                 go->active_buf->modet_active = 0;
 369                 }
 370                 go->active_buf->state = BUF_STATE_DONE;
 371                 wake_up_interruptible(&go->frame_waitq);
 372                 go->active_buf = NULL;
 373         }
 374         list_for_each_entry(gobuf, &go->stream, stream)
 375                 if (gobuf->state == BUF_STATE_QUEUED) {
 376                         gobuf->seq = go->next_seq;
 377                         do_gettimeofday(&gobuf->timestamp);
 378                         go->active_buf = gobuf;
 379                         break;
 380                 }
 381         ++go->next_seq;
 382 }
 383
 384 static void write_bitmap_word(struct go7007 *go)
 385 {
 386         int x, y, i, stride = ((go->width >> 4) + 7) >> 3;
 387
 388         for (i = 0; i < 16; ++i) {
 389                 y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
 390                 x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
 391                 go->active_map[stride * y + (x >> 3)] |=
 392                                         (go->modet_word & 1) << (x & 0x7);
 393                 go->modet_word >>= 1;
 394         }
 395 }
 396
 397 /*
 398  * Parse a chunk of the video stream into frames.  The frames are not
 399  * delimited by the hardware, so we have to parse the frame boundaries
 400  * based on the type of video stream we're receiving.
 401  */
 402 void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
 403 {
 404         int i, seq_start_code = -1, frame_start_code = -1;
 405
 406         spin_lock(&go->spinlock);
 407
 408         switch (go->format) {
 409         case GO7007_FORMAT_MPEG4:
 410                 seq_start_code = 0xB0;
 411                 frame_start_code = 0xB6;
 412                 break;
 413         case GO7007_FORMAT_MPEG1:
 414         case GO7007_FORMAT_MPEG2:
 415                 seq_start_code = 0xB3;
 416                 frame_start_code = 0x00;
 417                 break;
 418         }
 419
 420         for (i = 0; i < length; ++i) {
 421                 if (go->active_buf != NULL &&
 422                             go->active_buf->bytesused >= GO7007_BUF_SIZE - 3) {
 423                         v4l2_info(go->video_dev, "dropping oversized frame\n");
 424                         go->active_buf->offset -= go->active_buf->bytesused;
 425                         go->active_buf->bytesused = 0;
 426                         go->active_buf->modet_active = 0;
 427                         go->active_buf = NULL;
 428                 }
 429
 430                 switch (go->state) {
 431                 case STATE_DATA:
 432                         switch (buf[i]) {
 433                         case 0x00:
 434                                 go->state = STATE_00;
 435                                 break;
 436                         case 0xFF:
 437                                 go->state = STATE_FF;
 438                                 break;
 439                         default:
 440                                 store_byte(go->active_buf, buf[i]);
 441                                 break;
 442                         }
 443                         break;
 444                 case STATE_00:
 445                         switch (buf[i]) {
 446                         case 0x00:
 447                                 go->state = STATE_00_00;
 448                                 break;
 449                         case 0xFF:
 450                                 store_byte(go->active_buf, 0x00);
 451                                 go->state = STATE_FF;
 452                                 break;
 453                         default:
 454                                 store_byte(go->active_buf, 0x00);
 455                                 store_byte(go->active_buf, buf[i]);
 456                                 go->state = STATE_DATA;
 457                                 break;
 458                         }
 459                         break;
 460                 case STATE_00_00:
 461                         switch (buf[i]) {
 462                         case 0x00:
 463                                 store_byte(go->active_buf, 0x00);
 464                                 /* go->state remains STATE_00_00 */
 465                                 break;
 466                         case 0x01:
 467                                 go->state = STATE_00_00_01;
 468                                 break;
 469                         case 0xFF:
 470                                 store_byte(go->active_buf, 0x00);
 471                                 store_byte(go->active_buf, 0x00);
 472                                 go->state = STATE_FF;
 473                                 break;
 474                         default:
 475                                 store_byte(go->active_buf, 0x00);
 476                                 store_byte(go->active_buf, 0x00);
 477                                 store_byte(go->active_buf, buf[i]);
 478                                 go->state = STATE_DATA;
 479                                 break;
 480                         }
 481                         break;
 482                 case STATE_00_00_01:
 483                         /* If this is the start of a new MPEG frame,
 484                          * get a new buffer */
 485                         if ((go->format == GO7007_FORMAT_MPEG1 ||
 486                                         go->format == GO7007_FORMAT_MPEG2 ||
 487                                         go->format == GO7007_FORMAT_MPEG4) &&
 488                                         (buf[i] == seq_start_code ||
 489                                                 buf[i] == 0xB8 || /* GOP code */
 490                                                 buf[i] == frame_start_code)) {
 491                                 if (go->active_buf == NULL || go->seen_frame)
 492                                         frame_boundary(go);
 493                                 if (buf[i] == frame_start_code) {
 494                                         if (go->active_buf != NULL)
 495                                                 go->active_buf->frame_offset =
 496                                                         go->active_buf->offset;
 497                                         go->seen_frame = 1;
 498                                 } else {
 499                                         go->seen_frame = 0;
 500                                 }
 501                         }
 502                         /* Handle any special chunk types, or just write the
 503                          * start code to the (potentially new) buffer */
 504                         switch (buf[i]) {
 505                         case 0xF5: /* timestamp */
 506                                 go->parse_length = 12;
 507                                 go->state = STATE_UNPARSED;
 508                                 break;
 509                         case 0xF6: /* vbi */
 510                                 go->state = STATE_VBI_LEN_A;
 511                                 break;
 512                         case 0xF8: /* MD map */
 513                                 go->parse_length = 0;
 514                                 memset(go->active_map, 0,
 515                                                 sizeof(go->active_map));
 516                                 go->state = STATE_MODET_MAP;
 517                                 break;
 518                         case 0xFF: /* Potential JPEG start code */
 519                                 store_byte(go->active_buf, 0x00);
 520                                 store_byte(go->active_buf, 0x00);
 521                                 store_byte(go->active_buf, 0x01);
 522                                 go->state = STATE_FF;
 523                                 break;
 524                         default:
 525                                 store_byte(go->active_buf, 0x00);
 526                                 store_byte(go->active_buf, 0x00);
 527                                 store_byte(go->active_buf, 0x01);
 528                                 store_byte(go->active_buf, buf[i]);
 529                                 go->state = STATE_DATA;
 530                                 break;
 531                         }
 532                         break;
 533                 case STATE_FF:
 534                         switch (buf[i]) {
 535                         case 0x00:
 536                                 store_byte(go->active_buf, 0xFF);
 537                                 go->state = STATE_00;
 538                                 break;
 539                         case 0xFF:
 540                                 store_byte(go->active_buf, 0xFF);
 541                                 /* go->state remains STATE_FF */
 542                                 break;
 543                         case 0xD8:
 544                                 if (go->format == GO7007_FORMAT_MJPEG)
 545                                         frame_boundary(go);
 546                                 /* fall through */
 547                         default:
 548                                 store_byte(go->active_buf, 0xFF);
 549                                 store_byte(go->active_buf, buf[i]);
 550                                 go->state = STATE_DATA;
 551                                 break;
 552                         }
 553                         break;
 554                 case STATE_VBI_LEN_A:
 555                         go->parse_length = buf[i] << 8;
 556                         go->state = STATE_VBI_LEN_B;
 557                         break;
 558                 case STATE_VBI_LEN_B:
 559                         go->parse_length |= buf[i];
 560                         if (go->parse_length > 0)
 561                                 go->state = STATE_UNPARSED;
 562                         else
 563                                 go->state = STATE_DATA;
 564                         break;
 565                 case STATE_MODET_MAP:
 566                         if (go->parse_length < 204) {
 567                                 if (go->parse_length & 1) {
 568                                         go->modet_word |= buf[i];
 569                                         write_bitmap_word(go);
 570                                 } else
 571                                         go->modet_word = buf[i] << 8;
 572                         } else if (go->parse_length == 207 && go->active_buf) {
 573                                 go->active_buf->modet_active = buf[i];
 574                         }
 575                         if (++go->parse_length == 208)
 576                                 go->state = STATE_DATA;
 577                         break;
 578                 case STATE_UNPARSED:
 579                         if (--go->parse_length == 0)
 580                                 go->state = STATE_DATA;
 581                         break;
 582                 }
 583         }
 584
 585         spin_unlock(&go->spinlock);
 586 }
 587 EXPORT_SYMBOL(go7007_parse_video_stream);
 588
 589 /*
 590  * Allocate a new go7007 struct.  Used by the hardware-specific probe.
 591  */
 592 struct go7007 *go7007_alloc(struct go7007_board_info *board, struct device *dev)
 593 {
 594         struct go7007 *go;
 595         int i;
 596
 597         go = kmalloc(sizeof(struct go7007), GFP_KERNEL);
 598         if (go == NULL)
 599                 return NULL;
 600         go->dev = dev;
 601         go->board_info = board;
 602         go->board_id = 0;
 603         go->tuner_type = -1;
 604         go->channel_number = 0;
 605         go->name[0] = 0;
 606         mutex_init(&go->hw_lock);
 607         init_waitqueue_head(&go->frame_waitq);
 608         spin_lock_init(&go->spinlock);
 609         go->video_dev = NULL;
 610         go->ref_count = 0;
 611         go->status = STATUS_INIT;
 612         memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
 613         go->i2c_adapter_online = 0;
 614         go->interrupt_available = 0;
 615         init_waitqueue_head(&go->interrupt_waitq);
 616         go->in_use = 0;
 617         go->input = 0;
 618         if (board->sensor_flags & GO7007_SENSOR_TV) {
 619                 go->standard = GO7007_STD_NTSC;
 620                 go->width = 720;
 621                 go->height = 480;
 622                 go->sensor_framerate = 30000;
 623         } else {
 624                 go->standard = GO7007_STD_OTHER;
 625                 go->width = board->sensor_width;
 626                 go->height = board->sensor_height;
 627                 go->sensor_framerate = board->sensor_framerate;
 628         }
 629         go->encoder_v_offset = board->sensor_v_offset;
 630         go->encoder_h_offset = board->sensor_h_offset;
 631         go->encoder_h_halve = 0;
 632         go->encoder_v_halve = 0;
 633         go->encoder_subsample = 0;
 634         go->streaming = 0;
 635         go->format = GO7007_FORMAT_MJPEG;
 636         go->bitrate = 1500000;
 637         go->fps_scale = 1;
 638         go->pali = 0;
 639         go->aspect_ratio = GO7007_RATIO_1_1;
 640         go->gop_size = 0;
 641         go->ipb = 0;
 642         go->closed_gop = 0;
 643         go->repeat_seqhead = 0;
 644         go->seq_header_enable = 0;
 645         go->gop_header_enable = 0;
 646         go->dvd_mode = 0;
 647         go->interlace_coding = 0;
 648         for (i = 0; i < 4; ++i)
 649                 go->modet[i].enable = 0;;
 650         for (i = 0; i < 1624; ++i)
 651                 go->modet_map[i] = 0;
 652         go->audio_deliver = NULL;
 653         go->audio_enabled = 0;
 654         INIT_LIST_HEAD(&go->stream);
 655
 656         return go;
 657 }
 658 EXPORT_SYMBOL(go7007_alloc);
 659
 660 /*
 661  * Detach and unregister the encoder.  The go7007 struct won't be freed
 662  * until v4l2 finishes releasing its resources and all associated fds are
 663  * closed by applications.
 664  */
 665 void go7007_remove(struct go7007 *go)
 666 {
 667         if (go->i2c_adapter_online) {
 668                 if (i2c_del_adapter(&go->i2c_adapter) == 0)
 669                         go->i2c_adapter_online = 0;
 670                 else
 671                         v4l2_err(go->video_dev,
 672                                 "error removing I2C adapter!\n");
 673         }
 674
 675         if (go->audio_enabled)
 676                 go7007_snd_remove(go);
 677         go7007_v4l2_remove(go);
 678 }
 679 EXPORT_SYMBOL(go7007_remove);
 680
 681 MODULE_LICENSE("GPL v2");