git.oblomov.eu Git - 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/semaphore.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                 printk(KERN_ERR "go7007: 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                 printk(KERN_ERR
 101                         "go7007: unable to load firmware from file \"%s\"\n",
 102                         fw_name);
 103                 return -1;
 104         }
 105         if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) {
 106                 printk(KERN_ERR "go7007: file \"%s\" does not appear to be "
 107                                 "go7007 firmware\n", fw_name);
 108                 release_firmware(fw_entry);
 109                 return -1;
 110         }
 111         fw_len = fw_entry->size - 16;
 112         bounce = kmalloc(fw_len, GFP_KERNEL);
 113         if (bounce == NULL) {
 114                 printk(KERN_ERR "go7007: unable to allocate %d bytes for "
 115                                 "firmware transfer\n", fw_len);
 116                 release_firmware(fw_entry);
 117                 return -1;
 118         }
 119         memcpy(bounce, fw_entry->data + 16, fw_len);
 120         release_firmware(fw_entry);
 121         if (go7007_interface_reset(go) < 0 ||
 122                         go7007_send_firmware(go, bounce, fw_len) < 0 ||
 123                         go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
 124                         (intr_val & ~0x1) != 0x5a5a) {
 125                 printk(KERN_ERR "go7007: error transferring firmware\n");
 126                 rv = -1;
 127         }
 128         kfree(bounce);
 129         return rv;
 130 }
 131
 132 /*
 133  * Boot the encoder and register the I2C adapter if requested.  Do the
 134  * minimum initialization necessary, since the board-specific code may
 135  * still need to probe the board ID.
 136  *
 137  * Must NOT be called with the hw_lock held.
 138  */
 139 int go7007_boot_encoder(struct go7007 *go, int init_i2c)
 140 {
 141         int ret;
 142
 143         down(&go->hw_lock);
 144         ret = go7007_load_encoder(go);
 145         up(&go->hw_lock);
 146         if (ret < 0)
 147                 return -1;
 148         if (!init_i2c)
 149                 return 0;
 150         if (go7007_i2c_init(go) < 0)
 151                 return -1;
 152         go->i2c_adapter_online = 1;
 153         return 0;
 154 }
 155 EXPORT_SYMBOL(go7007_boot_encoder);
 156
 157 /*
 158  * Configure any hardware-related registers in the GO7007, such as GPIO
 159  * pins and bus parameters, which are board-specific.  This assumes
 160  * the boot firmware has already been downloaded.
 161  *
 162  * Must be called with the hw_lock held.
 163  */
 164 static int go7007_init_encoder(struct go7007 *go)
 165 {
 166         if (go->board_info->audio_flags & GO7007_AUDIO_I2S_MASTER) {
 167                 go7007_write_addr(go, 0x1000, 0x0811);
 168                 go7007_write_addr(go, 0x1000, 0x0c11);
 169         }
 170         if (go->board_id == GO7007_BOARDID_MATRIX_REV) {
 171                 /* Set GPIO pin 0 to be an output (audio clock control) */
 172                 go7007_write_addr(go, 0x3c82, 0x0001);
 173                 go7007_write_addr(go, 0x3c80, 0x00fe);
 174         }
 175         return 0;
 176 }
 177
 178 /*
 179  * Send the boot firmware to the GO7007 and configure the registers.  This
 180  * is the only way to stop the encoder once it has started streaming video.
 181  *
 182  * Must be called with the hw_lock held.
 183  */
 184 int go7007_reset_encoder(struct go7007 *go)
 185 {
 186         if (go7007_load_encoder(go) < 0)
 187                 return -1;
 188         return go7007_init_encoder(go);
 189 }
 190
 191 /*
 192  * Attempt to instantiate an I2C client by ID, probably loading a module.
 193  */
 194 static int init_i2c_module(struct i2c_adapter *adapter, int id, int addr)
 195 {
 196         char *modname;
 197
 198         switch (id) {
 199         case I2C_DRIVERID_WIS_SAA7115:
 200                 modname = "wis-saa7115";
 201                 break;
 202         case I2C_DRIVERID_WIS_SAA7113:
 203                 modname = "wis-saa7113";
 204                 break;
 205         case I2C_DRIVERID_WIS_UDA1342:
 206                 modname = "wis-uda1342";
 207                 break;
 208         case I2C_DRIVERID_WIS_SONY_TUNER:
 209                 modname = "wis-sony-tuner";
 210                 break;
 211         case I2C_DRIVERID_WIS_TW9903:
 212                 modname = "wis-tw9903";
 213                 break;
 214         case I2C_DRIVERID_WIS_TW2804:
 215                 modname = "wis-tw2804";
 216                 break;
 217         case I2C_DRIVERID_WIS_OV7640:
 218                 modname = "wis-ov7640";
 219                 break;
 220         default:
 221                 modname = NULL;
 222                 break;
 223         }
 224         if (modname != NULL)
 225                 request_module(modname);
 226         if (wis_i2c_probe_device(adapter, id, addr) == 1)
 227                 return 0;
 228         if (modname != NULL)
 229                 printk(KERN_INFO
 230                         "go7007: probing for module %s failed", modname);
 231         else
 232                 printk(KERN_INFO
 233                         "go7007: sensor %u seems to be unsupported!\n", id);
 234         return -1;
 235 }
 236
 237 /*
 238  * Finalize the GO7007 hardware setup, register the on-board I2C adapter
 239  * (if used on this board), load the I2C client driver for the sensor
 240  * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
 241  * interfaces.
 242  *
 243  * Must NOT be called with the hw_lock held.
 244  */
 245 int go7007_register_encoder(struct go7007 *go)
 246 {
 247         int i, ret;
 248
 249         printk(KERN_INFO "go7007: registering new %s\n", go->name);
 250
 251         down(&go->hw_lock);
 252         ret = go7007_init_encoder(go);
 253         up(&go->hw_lock);
 254         if (ret < 0)
 255                 return -1;
 256
 257         if (!go->i2c_adapter_online &&
 258                         go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
 259                 if (go7007_i2c_init(go) < 0)
 260                         return -1;
 261                 go->i2c_adapter_online = 1;
 262         }
 263         if (go->i2c_adapter_online) {
 264                 for (i = 0; i < go->board_info->num_i2c_devs; ++i)
 265                         init_i2c_module(&go->i2c_adapter,
 266                                         go->board_info->i2c_devs[i].id,
 267                                         go->board_info->i2c_devs[i].addr);
 268 #ifdef TUNER_SET_TYPE_ADDR
 269                 if (go->tuner_type >= 0) {
 270                         struct tuner_setup tun_setup = {
 271                                 .mode_mask      = T_ANALOG_TV,
 272                                 .addr           = ADDR_UNSET,
 273                                 .type           = go->tuner_type
 274                         };
 275                         i2c_clients_command(&go->i2c_adapter,
 276                                 TUNER_SET_TYPE_ADDR, &tun_setup);
 277                 }
 278 #else
 279                 if (go->tuner_type >= 0)
 280                         i2c_clients_command(&go->i2c_adapter,
 281                                 TUNER_SET_TYPE, &go->tuner_type);
 282 #endif
 283                 if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
 284                         i2c_clients_command(&go->i2c_adapter,
 285                                 DECODER_SET_CHANNEL, &go->channel_number);
 286         }
 287         if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
 288                 go->audio_enabled = 1;
 289                 go7007_snd_init(go);
 290         }
 291         return go7007_v4l2_init(go);
 292 }
 293 EXPORT_SYMBOL(go7007_register_encoder);
 294
 295 /*
 296  * Send the encode firmware to the encoder, which will cause it
 297  * to immediately start delivering the video and audio streams.
 298  *
 299  * Must be called with the hw_lock held.
 300  */
 301 int go7007_start_encoder(struct go7007 *go)
 302 {
 303         u8 *fw;
 304         int fw_len, rv = 0, i;
 305         u16 intr_val, intr_data;
 306
 307         go->modet_enable = 0;
 308         if (!go->dvd_mode)
 309                 for (i = 0; i < 4; ++i) {
 310                         if (go->modet[i].enable) {
 311                                 go->modet_enable = 1;
 312                                 continue;
 313                         }
 314                         go->modet[i].pixel_threshold = 32767;
 315                         go->modet[i].motion_threshold = 32767;
 316                         go->modet[i].mb_threshold = 32767;
 317                 }
 318
 319         if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
 320                 return -1;
 321
 322         if (go7007_send_firmware(go, fw, fw_len) < 0 ||
 323                         go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
 324                 printk(KERN_ERR "go7007: error transferring firmware\n");
 325                 rv = -1;
 326                 goto start_error;
 327         }
 328
 329         go->state = STATE_DATA;
 330         go->parse_length = 0;
 331         go->seen_frame = 0;
 332         if (go7007_stream_start(go) < 0) {
 333                 printk(KERN_ERR "go7007: error starting stream transfer\n");
 334                 rv = -1;
 335                 goto start_error;
 336         }
 337
 338 start_error:
 339         kfree(fw);
 340         return rv;
 341 }
 342
 343 /*
 344  * Store a byte in the current video buffer, if there is one.
 345  */
 346 static inline void store_byte(struct go7007_buffer *gobuf, u8 byte)
 347 {
 348         if (gobuf != NULL && gobuf->bytesused < GO7007_BUF_SIZE) {
 349                 unsigned int pgidx = gobuf->offset >> PAGE_SHIFT;
 350                 unsigned int pgoff = gobuf->offset & ~PAGE_MASK;
 351
 352                 *((u8 *)page_address(gobuf->pages[pgidx]) + pgoff) = byte;
 353                 ++gobuf->offset;
 354                 ++gobuf->bytesused;
 355         }
 356 }
 357
 358 /*
 359  * Deliver the last video buffer and get a new one to start writing to.
 360  */
 361 static void frame_boundary(struct go7007 *go)
 362 {
 363         struct go7007_buffer *gobuf;
 364         int i;
 365
 366         if (go->active_buf) {
 367                 if (go->active_buf->modet_active) {
 368                         if (go->active_buf->bytesused + 216 < GO7007_BUF_SIZE) {
 369                                 for (i = 0; i < 216; ++i)
 370                                         store_byte(go->active_buf,
 371                                                         go->active_map[i]);
 372                                 go->active_buf->bytesused -= 216;
 373                         } else
 374                                 go->active_buf->modet_active = 0;
 375                 }
 376                 go->active_buf->state = BUF_STATE_DONE;
 377                 wake_up_interruptible(&go->frame_waitq);
 378                 go->active_buf = NULL;
 379         }
 380         list_for_each_entry(gobuf, &go->stream, stream)
 381                 if (gobuf->state == BUF_STATE_QUEUED) {
 382                         gobuf->seq = go->next_seq;
 383                         do_gettimeofday(&gobuf->timestamp);
 384                         go->active_buf = gobuf;
 385                         break;
 386                 }
 387         ++go->next_seq;
 388 }
 389
 390 static void write_bitmap_word(struct go7007 *go)
 391 {
 392         int x, y, i, stride = ((go->width >> 4) + 7) >> 3;
 393
 394         for (i = 0; i < 16; ++i) {
 395                 y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
 396                 x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
 397                 go->active_map[stride * y + (x >> 3)] |=
 398                                         (go->modet_word & 1) << (x & 0x7);
 399                 go->modet_word >>= 1;
 400         }
 401 }
 402
 403 /*
 404  * Parse a chunk of the video stream into frames.  The frames are not
 405  * delimited by the hardware, so we have to parse the frame boundaries
 406  * based on the type of video stream we're receiving.
 407  */
 408 void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
 409 {
 410         int i, seq_start_code = -1, frame_start_code = -1;
 411
 412         spin_lock(&go->spinlock);
 413
 414         switch (go->format) {
 415         case GO7007_FORMAT_MPEG4:
 416                 seq_start_code = 0xB0;
 417                 frame_start_code = 0xB6;
 418                 break;
 419         case GO7007_FORMAT_MPEG1:
 420         case GO7007_FORMAT_MPEG2:
 421                 seq_start_code = 0xB3;
 422                 frame_start_code = 0x00;
 423                 break;
 424         }
 425
 426         for (i = 0; i < length; ++i) {
 427                 if (go->active_buf != NULL &&
 428                             go->active_buf->bytesused >= GO7007_BUF_SIZE - 3) {
 429                         printk(KERN_DEBUG "go7007: dropping oversized frame\n");
 430                         go->active_buf->offset -= go->active_buf->bytesused;
 431                         go->active_buf->bytesused = 0;
 432                         go->active_buf->modet_active = 0;
 433                         go->active_buf = NULL;
 434                 }
 435
 436                 switch (go->state) {
 437                 case STATE_DATA:
 438                         switch (buf[i]) {
 439                         case 0x00:
 440                                 go->state = STATE_00;
 441                                 break;
 442                         case 0xFF:
 443                                 go->state = STATE_FF;
 444                                 break;
 445                         default:
 446                                 store_byte(go->active_buf, buf[i]);
 447                                 break;
 448                         }
 449                         break;
 450                 case STATE_00:
 451                         switch (buf[i]) {
 452                         case 0x00:
 453                                 go->state = STATE_00_00;
 454                                 break;
 455                         case 0xFF:
 456                                 store_byte(go->active_buf, 0x00);
 457                                 go->state = STATE_FF;
 458                                 break;
 459                         default:
 460                                 store_byte(go->active_buf, 0x00);
 461                                 store_byte(go->active_buf, buf[i]);
 462                                 go->state = STATE_DATA;
 463                                 break;
 464                         }
 465                         break;
 466                 case STATE_00_00:
 467                         switch (buf[i]) {
 468                         case 0x00:
 469                                 store_byte(go->active_buf, 0x00);
 470                                 /* go->state remains STATE_00_00 */
 471                                 break;
 472                         case 0x01:
 473                                 go->state = STATE_00_00_01;
 474                                 break;
 475                         case 0xFF:
 476                                 store_byte(go->active_buf, 0x00);
 477                                 store_byte(go->active_buf, 0x00);
 478                                 go->state = STATE_FF;
 479                                 break;
 480                         default:
 481                                 store_byte(go->active_buf, 0x00);
 482                                 store_byte(go->active_buf, 0x00);
 483                                 store_byte(go->active_buf, buf[i]);
 484                                 go->state = STATE_DATA;
 485                                 break;
 486                         }
 487                         break;
 488                 case STATE_00_00_01:
 489                         /* If this is the start of a new MPEG frame,
 490                          * get a new buffer */
 491                         if ((go->format == GO7007_FORMAT_MPEG1 ||
 492                                         go->format == GO7007_FORMAT_MPEG2 ||
 493                                         go->format == GO7007_FORMAT_MPEG4) &&
 494                                         (buf[i] == seq_start_code ||
 495                                                 buf[i] == 0xB8 || /* GOP code */
 496                                                 buf[i] == frame_start_code)) {
 497                                 if (go->active_buf == NULL || go->seen_frame)
 498                                         frame_boundary(go);
 499                                 if (buf[i] == frame_start_code) {
 500                                         if (go->active_buf != NULL)
 501                                                 go->active_buf->frame_offset =
 502                                                         go->active_buf->offset;
 503                                         go->seen_frame = 1;
 504                                 } else {
 505                                         go->seen_frame = 0;
 506                                 }
 507                         }
 508                         /* Handle any special chunk types, or just write the
 509                          * start code to the (potentially new) buffer */
 510                         switch (buf[i]) {
 511                         case 0xF5: /* timestamp */
 512                                 go->parse_length = 12;
 513                                 go->state = STATE_UNPARSED;
 514                                 break;
 515                         case 0xF6: /* vbi */
 516                                 go->state = STATE_VBI_LEN_A;
 517                                 break;
 518                         case 0xF8: /* MD map */
 519                                 go->parse_length = 0;
 520                                 memset(go->active_map, 0,
 521                                                 sizeof(go->active_map));
 522                                 go->state = STATE_MODET_MAP;
 523                                 break;
 524                         case 0xFF: /* Potential JPEG start code */
 525                                 store_byte(go->active_buf, 0x00);
 526                                 store_byte(go->active_buf, 0x00);
 527                                 store_byte(go->active_buf, 0x01);
 528                                 go->state = STATE_FF;
 529                                 break;
 530                         default:
 531                                 store_byte(go->active_buf, 0x00);
 532                                 store_byte(go->active_buf, 0x00);
 533                                 store_byte(go->active_buf, 0x01);
 534                                 store_byte(go->active_buf, buf[i]);
 535                                 go->state = STATE_DATA;
 536                                 break;
 537                         }
 538                         break;
 539                 case STATE_FF:
 540                         switch (buf[i]) {
 541                         case 0x00:
 542                                 store_byte(go->active_buf, 0xFF);
 543                                 go->state = STATE_00;
 544                                 break;
 545                         case 0xFF:
 546                                 store_byte(go->active_buf, 0xFF);
 547                                 /* go->state remains STATE_FF */
 548                                 break;
 549                         case 0xD8:
 550                                 if (go->format == GO7007_FORMAT_MJPEG)
 551                                         frame_boundary(go);
 552                                 /* fall through */
 553                         default:
 554                                 store_byte(go->active_buf, 0xFF);
 555                                 store_byte(go->active_buf, buf[i]);
 556                                 go->state = STATE_DATA;
 557                                 break;
 558                         }
 559                         break;
 560                 case STATE_VBI_LEN_A:
 561                         go->parse_length = buf[i] << 8;
 562                         go->state = STATE_VBI_LEN_B;
 563                         break;
 564                 case STATE_VBI_LEN_B:
 565                         go->parse_length |= buf[i];
 566                         if (go->parse_length > 0)
 567                                 go->state = STATE_UNPARSED;
 568                         else
 569                                 go->state = STATE_DATA;
 570                         break;
 571                 case STATE_MODET_MAP:
 572                         if (go->parse_length < 204) {
 573                                 if (go->parse_length & 1) {
 574                                         go->modet_word |= buf[i];
 575                                         write_bitmap_word(go);
 576                                 } else
 577                                         go->modet_word = buf[i] << 8;
 578                         } else if (go->parse_length == 207 && go->active_buf) {
 579                                 go->active_buf->modet_active = buf[i];
 580                         }
 581                         if (++go->parse_length == 208)
 582                                 go->state = STATE_DATA;
 583                         break;
 584                 case STATE_UNPARSED:
 585                         if (--go->parse_length == 0)
 586                                 go->state = STATE_DATA;
 587                         break;
 588                 }
 589         }
 590
 591         spin_unlock(&go->spinlock);
 592 }
 593 EXPORT_SYMBOL(go7007_parse_video_stream);
 594
 595 /*
 596  * Allocate a new go7007 struct.  Used by the hardware-specific probe.
 597  */
 598 struct go7007 *go7007_alloc(struct go7007_board_info *board, struct device *dev)
 599 {
 600         struct go7007 *go;
 601         int i;
 602
 603         go = kmalloc(sizeof(struct go7007), GFP_KERNEL);
 604         if (go == NULL)
 605                 return NULL;
 606         go->dev = dev;
 607         go->board_info = board;
 608         go->board_id = 0;
 609         go->tuner_type = -1;
 610         go->channel_number = 0;
 611         go->name[0] = 0;
 612         init_MUTEX(&go->hw_lock);
 613         init_waitqueue_head(&go->frame_waitq);
 614         spin_lock_init(&go->spinlock);
 615         go->video_dev = NULL;
 616         go->ref_count = 0;
 617         go->status = STATUS_INIT;
 618         memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
 619         go->i2c_adapter_online = 0;
 620         go->interrupt_available = 0;
 621         init_waitqueue_head(&go->interrupt_waitq);
 622         go->in_use = 0;
 623         go->input = 0;
 624         if (board->sensor_flags & GO7007_SENSOR_TV) {
 625                 go->standard = GO7007_STD_NTSC;
 626                 go->width = 720;
 627                 go->height = 480;
 628                 go->sensor_framerate = 30000;
 629         } else {
 630                 go->standard = GO7007_STD_OTHER;
 631                 go->width = board->sensor_width;
 632                 go->height = board->sensor_height;
 633                 go->sensor_framerate = board->sensor_framerate;
 634         }
 635         go->encoder_v_offset = board->sensor_v_offset;
 636         go->encoder_h_offset = board->sensor_h_offset;
 637         go->encoder_h_halve = 0;
 638         go->encoder_v_halve = 0;
 639         go->encoder_subsample = 0;
 640         go->streaming = 0;
 641         go->format = GO7007_FORMAT_MJPEG;
 642         go->bitrate = 1500000;
 643         go->fps_scale = 1;
 644         go->pali = 0;
 645         go->aspect_ratio = GO7007_RATIO_1_1;
 646         go->gop_size = 0;
 647         go->ipb = 0;
 648         go->closed_gop = 0;
 649         go->repeat_seqhead = 0;
 650         go->seq_header_enable = 0;
 651         go->gop_header_enable = 0;
 652         go->dvd_mode = 0;
 653         go->interlace_coding = 0;
 654         for (i = 0; i < 4; ++i)
 655                 go->modet[i].enable = 0;;
 656         for (i = 0; i < 1624; ++i)
 657                 go->modet_map[i] = 0;
 658         go->audio_deliver = NULL;
 659         go->audio_enabled = 0;
 660         INIT_LIST_HEAD(&go->stream);
 661
 662         return go;
 663 }
 664 EXPORT_SYMBOL(go7007_alloc);
 665
 666 /*
 667  * Detach and unregister the encoder.  The go7007 struct won't be freed
 668  * until v4l2 finishes releasing its resources and all associated fds are
 669  * closed by applications.
 670  */
 671 void go7007_remove(struct go7007 *go)
 672 {
 673         if (go->i2c_adapter_online) {
 674                 if (i2c_del_adapter(&go->i2c_adapter) == 0)
 675                         go->i2c_adapter_online = 0;
 676                 else
 677                         printk(KERN_ERR
 678                                 "go7007: error removing I2C adapter!\n");
 679         }
 680
 681         if (go->audio_enabled)
 682                 go7007_snd_remove(go);
 683         go7007_v4l2_remove(go);
 684 }
 685 EXPORT_SYMBOL(go7007_remove);
 686
 687 MODULE_LICENSE("GPL v2");