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->v4l2_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 MODULE_FIRMWARE("go7007fw.bin");
 132
 133 /*
 134  * Boot the encoder and register the I2C adapter if requested.  Do the
 135  * minimum initialization necessary, since the board-specific code may
 136  * still need to probe the board ID.
 137  *
 138  * Must NOT be called with the hw_lock held.
 139  */
 140 int go7007_boot_encoder(struct go7007 *go, int init_i2c)
 141 {
 142         int ret;
 143
 144         mutex_lock(&go->hw_lock);
 145         ret = go7007_load_encoder(go);
 146         mutex_unlock(&go->hw_lock);
 147         if (ret < 0)
 148                 return -1;
 149         if (!init_i2c)
 150                 return 0;
 151         if (go7007_i2c_init(go) < 0)
 152                 return -1;
 153         go->i2c_adapter_online = 1;
 154         return 0;
 155 }
 156 EXPORT_SYMBOL(go7007_boot_encoder);
 157
 158 /*
 159  * Configure any hardware-related registers in the GO7007, such as GPIO
 160  * pins and bus parameters, which are board-specific.  This assumes
 161  * the boot firmware has already been downloaded.
 162  *
 163  * Must be called with the hw_lock held.
 164  */
 165 static int go7007_init_encoder(struct go7007 *go)
 166 {
 167         if (go->board_info->audio_flags & GO7007_AUDIO_I2S_MASTER) {
 168                 go7007_write_addr(go, 0x1000, 0x0811);
 169                 go7007_write_addr(go, 0x1000, 0x0c11);
 170         }
 171         if (go->board_id == GO7007_BOARDID_MATRIX_REV) {
 172                 /* Set GPIO pin 0 to be an output (audio clock control) */
 173                 go7007_write_addr(go, 0x3c82, 0x0001);
 174                 go7007_write_addr(go, 0x3c80, 0x00fe);
 175         }
 176         return 0;
 177 }
 178
 179 /*
 180  * Send the boot firmware to the GO7007 and configure the registers.  This
 181  * is the only way to stop the encoder once it has started streaming video.
 182  *
 183  * Must be called with the hw_lock held.
 184  */
 185 int go7007_reset_encoder(struct go7007 *go)
 186 {
 187         if (go7007_load_encoder(go) < 0)
 188                 return -1;
 189         return go7007_init_encoder(go);
 190 }
 191
 192 /*
 193  * Attempt to instantiate an I2C client by ID, probably loading a module.
 194  */
 195 static int init_i2c_module(struct i2c_adapter *adapter, const char *type,
 196                            int id, int addr)
 197 {
 198         struct go7007 *go = i2c_get_adapdata(adapter);
 199         struct v4l2_device *v4l2_dev = &go->v4l2_dev;
 200         char *modname;
 201
 202         switch (id) {
 203         case I2C_DRIVERID_WIS_SAA7115:
 204                 modname = "wis-saa7115";
 205                 break;
 206         case I2C_DRIVERID_WIS_SAA7113:
 207                 modname = "wis-saa7113";
 208                 break;
 209         case I2C_DRIVERID_WIS_UDA1342:
 210                 modname = "wis-uda1342";
 211                 break;
 212         case I2C_DRIVERID_WIS_SONY_TUNER:
 213                 modname = "wis-sony-tuner";
 214                 break;
 215         case I2C_DRIVERID_WIS_TW9903:
 216                 modname = "wis-tw9903";
 217                 break;
 218         case I2C_DRIVERID_WIS_TW2804:
 219                 modname = "wis-tw2804";
 220                 break;
 221         case I2C_DRIVERID_WIS_OV7640:
 222                 modname = "wis-ov7640";
 223                 break;
 224         case I2C_DRIVERID_S2250:
 225                 modname = "s2250";
 226                 break;
 227         default:
 228                 modname = NULL;
 229                 break;
 230         }
 231
 232         if (v4l2_i2c_new_subdev(v4l2_dev, adapter, modname, type, addr, NULL))
 233                 return 0;
 234
 235         if (modname != NULL)
 236                 printk(KERN_INFO
 237                         "go7007: probing for module %s failed\n", modname);
 238         else
 239                 printk(KERN_INFO
 240                         "go7007: sensor %u seems to be unsupported!\n", id);
 241         return -1;
 242 }
 243
 244 /*
 245  * Finalize the GO7007 hardware setup, register the on-board I2C adapter
 246  * (if used on this board), load the I2C client driver for the sensor
 247  * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
 248  * interfaces.
 249  *
 250  * Must NOT be called with the hw_lock held.
 251  */
 252 int go7007_register_encoder(struct go7007 *go)
 253 {
 254         int i, ret;
 255
 256         printk(KERN_INFO "go7007: registering new %s\n", go->name);
 257
 258         mutex_lock(&go->hw_lock);
 259         ret = go7007_init_encoder(go);
 260         mutex_unlock(&go->hw_lock);
 261         if (ret < 0)
 262                 return -1;
 263
 264         /* v4l2 init must happen before i2c subdevs */
 265         ret = go7007_v4l2_init(go);
 266         if (ret < 0)
 267                 return ret;
 268
 269         if (!go->i2c_adapter_online &&
 270                         go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
 271                 if (go7007_i2c_init(go) < 0)
 272                         return -1;
 273                 go->i2c_adapter_online = 1;
 274         }
 275         if (go->i2c_adapter_online) {
 276                 for (i = 0; i < go->board_info->num_i2c_devs; ++i)
 277                         init_i2c_module(&go->i2c_adapter,
 278                                         go->board_info->i2c_devs[i].type,
 279                                         go->board_info->i2c_devs[i].id,
 280                                         go->board_info->i2c_devs[i].addr);
 281                 if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
 282                         i2c_clients_command(&go->i2c_adapter,
 283                                 DECODER_SET_CHANNEL, &go->channel_number);
 284         }
 285         if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
 286                 go->audio_enabled = 1;
 287                 go7007_snd_init(go);
 288         }
 289         return 0;
 290 }
 291 EXPORT_SYMBOL(go7007_register_encoder);
 292
 293 /*
 294  * Send the encode firmware to the encoder, which will cause it
 295  * to immediately start delivering the video and audio streams.
 296  *
 297  * Must be called with the hw_lock held.
 298  */
 299 int go7007_start_encoder(struct go7007 *go)
 300 {
 301         u8 *fw;
 302         int fw_len, rv = 0, i;
 303         u16 intr_val, intr_data;
 304
 305         go->modet_enable = 0;
 306         if (!go->dvd_mode)
 307                 for (i = 0; i < 4; ++i) {
 308                         if (go->modet[i].enable) {
 309                                 go->modet_enable = 1;
 310                                 continue;
 311                         }
 312                         go->modet[i].pixel_threshold = 32767;
 313                         go->modet[i].motion_threshold = 32767;
 314                         go->modet[i].mb_threshold = 32767;
 315                 }
 316
 317         if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
 318                 return -1;
 319
 320         if (go7007_send_firmware(go, fw, fw_len) < 0 ||
 321                         go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
 322                 v4l2_err(&go->v4l2_dev, "error transferring firmware\n");
 323                 rv = -1;
 324                 goto start_error;
 325         }
 326
 327         go->state = STATE_DATA;
 328         go->parse_length = 0;
 329         go->seen_frame = 0;
 330         if (go7007_stream_start(go) < 0) {
 331                 v4l2_err(&go->v4l2_dev, "error starting stream transfer\n");
 332                 rv = -1;
 333                 goto start_error;
 334         }
 335
 336 start_error:
 337         kfree(fw);
 338         return rv;
 339 }
 340
 341 /*
 342  * Store a byte in the current video buffer, if there is one.
 343  */
 344 static inline void store_byte(struct go7007_buffer *gobuf, u8 byte)
 345 {
 346         if (gobuf != NULL && gobuf->bytesused < GO7007_BUF_SIZE) {
 347                 unsigned int pgidx = gobuf->offset >> PAGE_SHIFT;
 348                 unsigned int pgoff = gobuf->offset & ~PAGE_MASK;
 349
 350                 *((u8 *)page_address(gobuf->pages[pgidx]) + pgoff) = byte;
 351                 ++gobuf->offset;
 352                 ++gobuf->bytesused;
 353         }
 354 }
 355
 356 /*
 357  * Deliver the last video buffer and get a new one to start writing to.
 358  */
 359 static void frame_boundary(struct go7007 *go)
 360 {
 361         struct go7007_buffer *gobuf;
 362         int i;
 363
 364         if (go->active_buf) {
 365                 if (go->active_buf->modet_active) {
 366                         if (go->active_buf->bytesused + 216 < GO7007_BUF_SIZE) {
 367                                 for (i = 0; i < 216; ++i)
 368                                         store_byte(go->active_buf,
 369                                                         go->active_map[i]);
 370                                 go->active_buf->bytesused -= 216;
 371                         } else
 372                                 go->active_buf->modet_active = 0;
 373                 }
 374                 go->active_buf->state = BUF_STATE_DONE;
 375                 wake_up_interruptible(&go->frame_waitq);
 376                 go->active_buf = NULL;
 377         }
 378         list_for_each_entry(gobuf, &go->stream, stream)
 379                 if (gobuf->state == BUF_STATE_QUEUED) {
 380                         gobuf->seq = go->next_seq;
 381                         do_gettimeofday(&gobuf->timestamp);
 382                         go->active_buf = gobuf;
 383                         break;
 384                 }
 385         ++go->next_seq;
 386 }
 387
 388 static void write_bitmap_word(struct go7007 *go)
 389 {
 390         int x, y, i, stride = ((go->width >> 4) + 7) >> 3;
 391
 392         for (i = 0; i < 16; ++i) {
 393                 y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
 394                 x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
 395                 go->active_map[stride * y + (x >> 3)] |=
 396                                         (go->modet_word & 1) << (x & 0x7);
 397                 go->modet_word >>= 1;
 398         }
 399 }
 400
 401 /*
 402  * Parse a chunk of the video stream into frames.  The frames are not
 403  * delimited by the hardware, so we have to parse the frame boundaries
 404  * based on the type of video stream we're receiving.
 405  */
 406 void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
 407 {
 408         int i, seq_start_code = -1, frame_start_code = -1;
 409
 410         spin_lock(&go->spinlock);
 411
 412         switch (go->format) {
 413         case GO7007_FORMAT_MPEG4:
 414                 seq_start_code = 0xB0;
 415                 frame_start_code = 0xB6;
 416                 break;
 417         case GO7007_FORMAT_MPEG1:
 418         case GO7007_FORMAT_MPEG2:
 419                 seq_start_code = 0xB3;
 420                 frame_start_code = 0x00;
 421                 break;
 422         }
 423
 424         for (i = 0; i < length; ++i) {
 425                 if (go->active_buf != NULL &&
 426                             go->active_buf->bytesused >= GO7007_BUF_SIZE - 3) {
 427                         v4l2_info(&go->v4l2_dev, "dropping oversized frame\n");
 428                         go->active_buf->offset -= go->active_buf->bytesused;
 429                         go->active_buf->bytesused = 0;
 430                         go->active_buf->modet_active = 0;
 431                         go->active_buf = NULL;
 432                 }
 433
 434                 switch (go->state) {
 435                 case STATE_DATA:
 436                         switch (buf[i]) {
 437                         case 0x00:
 438                                 go->state = STATE_00;
 439                                 break;
 440                         case 0xFF:
 441                                 go->state = STATE_FF;
 442                                 break;
 443                         default:
 444                                 store_byte(go->active_buf, buf[i]);
 445                                 break;
 446                         }
 447                         break;
 448                 case STATE_00:
 449                         switch (buf[i]) {
 450                         case 0x00:
 451                                 go->state = STATE_00_00;
 452                                 break;
 453                         case 0xFF:
 454                                 store_byte(go->active_buf, 0x00);
 455                                 go->state = STATE_FF;
 456                                 break;
 457                         default:
 458                                 store_byte(go->active_buf, 0x00);
 459                                 store_byte(go->active_buf, buf[i]);
 460                                 go->state = STATE_DATA;
 461                                 break;
 462                         }
 463                         break;
 464                 case STATE_00_00:
 465                         switch (buf[i]) {
 466                         case 0x00:
 467                                 store_byte(go->active_buf, 0x00);
 468                                 /* go->state remains STATE_00_00 */
 469                                 break;
 470                         case 0x01:
 471                                 go->state = STATE_00_00_01;
 472                                 break;
 473                         case 0xFF:
 474                                 store_byte(go->active_buf, 0x00);
 475                                 store_byte(go->active_buf, 0x00);
 476                                 go->state = STATE_FF;
 477                                 break;
 478                         default:
 479                                 store_byte(go->active_buf, 0x00);
 480                                 store_byte(go->active_buf, 0x00);
 481                                 store_byte(go->active_buf, buf[i]);
 482                                 go->state = STATE_DATA;
 483                                 break;
 484                         }
 485                         break;
 486                 case STATE_00_00_01:
 487                         /* If this is the start of a new MPEG frame,
 488                          * get a new buffer */
 489                         if ((go->format == GO7007_FORMAT_MPEG1 ||
 490                                         go->format == GO7007_FORMAT_MPEG2 ||
 491                                         go->format == GO7007_FORMAT_MPEG4) &&
 492                                         (buf[i] == seq_start_code ||
 493                                                 buf[i] == 0xB8 || /* GOP code */
 494                                                 buf[i] == frame_start_code)) {
 495                                 if (go->active_buf == NULL || go->seen_frame)
 496                                         frame_boundary(go);
 497                                 if (buf[i] == frame_start_code) {
 498                                         if (go->active_buf != NULL)
 499                                                 go->active_buf->frame_offset =
 500                                                         go->active_buf->offset;
 501                                         go->seen_frame = 1;
 502                                 } else {
 503                                         go->seen_frame = 0;
 504                                 }
 505                         }
 506                         /* Handle any special chunk types, or just write the
 507                          * start code to the (potentially new) buffer */
 508                         switch (buf[i]) {
 509                         case 0xF5: /* timestamp */
 510                                 go->parse_length = 12;
 511                                 go->state = STATE_UNPARSED;
 512                                 break;
 513                         case 0xF6: /* vbi */
 514                                 go->state = STATE_VBI_LEN_A;
 515                                 break;
 516                         case 0xF8: /* MD map */
 517                                 go->parse_length = 0;
 518                                 memset(go->active_map, 0,
 519                                                 sizeof(go->active_map));
 520                                 go->state = STATE_MODET_MAP;
 521                                 break;
 522                         case 0xFF: /* Potential JPEG start code */
 523                                 store_byte(go->active_buf, 0x00);
 524                                 store_byte(go->active_buf, 0x00);
 525                                 store_byte(go->active_buf, 0x01);
 526                                 go->state = STATE_FF;
 527                                 break;
 528                         default:
 529                                 store_byte(go->active_buf, 0x00);
 530                                 store_byte(go->active_buf, 0x00);
 531                                 store_byte(go->active_buf, 0x01);
 532                                 store_byte(go->active_buf, buf[i]);
 533                                 go->state = STATE_DATA;
 534                                 break;
 535                         }
 536                         break;
 537                 case STATE_FF:
 538                         switch (buf[i]) {
 539                         case 0x00:
 540                                 store_byte(go->active_buf, 0xFF);
 541                                 go->state = STATE_00;
 542                                 break;
 543                         case 0xFF:
 544                                 store_byte(go->active_buf, 0xFF);
 545                                 /* go->state remains STATE_FF */
 546                                 break;
 547                         case 0xD8:
 548                                 if (go->format == GO7007_FORMAT_MJPEG)
 549                                         frame_boundary(go);
 550                                 /* fall through */
 551                         default:
 552                                 store_byte(go->active_buf, 0xFF);
 553                                 store_byte(go->active_buf, buf[i]);
 554                                 go->state = STATE_DATA;
 555                                 break;
 556                         }
 557                         break;
 558                 case STATE_VBI_LEN_A:
 559                         go->parse_length = buf[i] << 8;
 560                         go->state = STATE_VBI_LEN_B;
 561                         break;
 562                 case STATE_VBI_LEN_B:
 563                         go->parse_length |= buf[i];
 564                         if (go->parse_length > 0)
 565                                 go->state = STATE_UNPARSED;
 566                         else
 567                                 go->state = STATE_DATA;
 568                         break;
 569                 case STATE_MODET_MAP:
 570                         if (go->parse_length < 204) {
 571                                 if (go->parse_length & 1) {
 572                                         go->modet_word |= buf[i];
 573                                         write_bitmap_word(go);
 574                                 } else
 575                                         go->modet_word = buf[i] << 8;
 576                         } else if (go->parse_length == 207 && go->active_buf) {
 577                                 go->active_buf->modet_active = buf[i];
 578                         }
 579                         if (++go->parse_length == 208)
 580                                 go->state = STATE_DATA;
 581                         break;
 582                 case STATE_UNPARSED:
 583                         if (--go->parse_length == 0)
 584                                 go->state = STATE_DATA;
 585                         break;
 586                 }
 587         }
 588
 589         spin_unlock(&go->spinlock);
 590 }
 591 EXPORT_SYMBOL(go7007_parse_video_stream);
 592
 593 /*
 594  * Allocate a new go7007 struct.  Used by the hardware-specific probe.
 595  */
 596 struct go7007 *go7007_alloc(struct go7007_board_info *board, struct device *dev)
 597 {
 598         struct go7007 *go;
 599         int i;
 600
 601         go = kmalloc(sizeof(struct go7007), GFP_KERNEL);
 602         if (go == NULL)
 603                 return NULL;
 604         go->dev = dev;
 605         go->board_info = board;
 606         go->board_id = 0;
 607         go->tuner_type = -1;
 608         go->channel_number = 0;
 609         go->name[0] = 0;
 610         mutex_init(&go->hw_lock);
 611         init_waitqueue_head(&go->frame_waitq);
 612         spin_lock_init(&go->spinlock);
 613         go->video_dev = NULL;
 614         go->ref_count = 0;
 615         go->status = STATUS_INIT;
 616         memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
 617         go->i2c_adapter_online = 0;
 618         go->interrupt_available = 0;
 619         init_waitqueue_head(&go->interrupt_waitq);
 620         go->in_use = 0;
 621         go->input = 0;
 622         if (board->sensor_flags & GO7007_SENSOR_TV) {
 623                 go->standard = GO7007_STD_NTSC;
 624                 go->width = 720;
 625                 go->height = 480;
 626                 go->sensor_framerate = 30000;
 627         } else {
 628                 go->standard = GO7007_STD_OTHER;
 629                 go->width = board->sensor_width;
 630                 go->height = board->sensor_height;
 631                 go->sensor_framerate = board->sensor_framerate;
 632         }
 633         go->encoder_v_offset = board->sensor_v_offset;
 634         go->encoder_h_offset = board->sensor_h_offset;
 635         go->encoder_h_halve = 0;
 636         go->encoder_v_halve = 0;
 637         go->encoder_subsample = 0;
 638         go->streaming = 0;
 639         go->format = GO7007_FORMAT_MJPEG;
 640         go->bitrate = 1500000;
 641         go->fps_scale = 1;
 642         go->pali = 0;
 643         go->aspect_ratio = GO7007_RATIO_1_1;
 644         go->gop_size = 0;
 645         go->ipb = 0;
 646         go->closed_gop = 0;
 647         go->repeat_seqhead = 0;
 648         go->seq_header_enable = 0;
 649         go->gop_header_enable = 0;
 650         go->dvd_mode = 0;
 651         go->interlace_coding = 0;
 652         for (i = 0; i < 4; ++i)
 653                 go->modet[i].enable = 0;;
 654         for (i = 0; i < 1624; ++i)
 655                 go->modet_map[i] = 0;
 656         go->audio_deliver = NULL;
 657         go->audio_enabled = 0;
 658         INIT_LIST_HEAD(&go->stream);
 659
 660         return go;
 661 }
 662 EXPORT_SYMBOL(go7007_alloc);
 663
 664 /*
 665  * Detach and unregister the encoder.  The go7007 struct won't be freed
 666  * until v4l2 finishes releasing its resources and all associated fds are
 667  * closed by applications.
 668  */
 669 void go7007_remove(struct go7007 *go)
 670 {
 671         if (go->i2c_adapter_online) {
 672                 if (i2c_del_adapter(&go->i2c_adapter) == 0)
 673                         go->i2c_adapter_online = 0;
 674                 else
 675                         v4l2_err(&go->v4l2_dev,
 676                                 "error removing I2C adapter!\n");
 677         }
 678
 679         if (go->audio_enabled)
 680                 go7007_snd_remove(go);
 681         go7007_v4l2_remove(go);
 682 }
 683 EXPORT_SYMBOL(go7007_remove);
 684
 685 MODULE_LICENSE("GPL v2");