drivers/staging/media/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 <linux/slab.h>
  33 #include <linux/videodev2.h>
  34 #include <media/tuner.h>
  35 #include <media/v4l2-common.h>
  36
  37 #include "go7007-priv.h"
  38
  39 /*
  40  * Wait for an interrupt to be delivered from the GO7007SB and return
  41  * the associated value and data.
  42  *
  43  * Must be called with the hw_lock held.
  44  */
  45 int go7007_read_interrupt(struct go7007 *go, u16 *value, u16 *data)
  46 {
  47         go->interrupt_available = 0;
  48         go->hpi_ops->read_interrupt(go);
  49         if (wait_event_timeout(go->interrupt_waitq,
  50                                 go->interrupt_available, 5*HZ) < 0) {
  51                 v4l2_err(&go->v4l2_dev, "timeout waiting for read interrupt\n");
  52                 return -1;
  53         }
  54         if (!go->interrupt_available)
  55                 return -1;
  56         go->interrupt_available = 0;
  57         *value = go->interrupt_value & 0xfffe;
  58         *data = go->interrupt_data;
  59         return 0;
  60 }
  61 EXPORT_SYMBOL(go7007_read_interrupt);
  62
  63 /*
  64  * Read a register/address on the GO7007SB.
  65  *
  66  * Must be called with the hw_lock held.
  67  */
  68 int go7007_read_addr(struct go7007 *go, u16 addr, u16 *data)
  69 {
  70         int count = 100;
  71         u16 value;
  72
  73         if (go7007_write_interrupt(go, 0x0010, addr) < 0)
  74                 return -EIO;
  75         while (count-- > 0) {
  76                 if (go7007_read_interrupt(go, &value, data) == 0 &&
  77                                 value == 0xa000)
  78                         return 0;
  79         }
  80         return -EIO;
  81 }
  82 EXPORT_SYMBOL(go7007_read_addr);
  83
  84 /*
  85  * Send the boot firmware to the encoder, which just wakes it up and lets
  86  * us talk to the GPIO pins and on-board I2C adapter.
  87  *
  88  * Must be called with the hw_lock held.
  89  */
  90 static int go7007_load_encoder(struct go7007 *go)
  91 {
  92         const struct firmware *fw_entry;
  93         char fw_name[] = "go7007/go7007fw.bin";
  94         void *bounce;
  95         int fw_len, rv = 0;
  96         u16 intr_val, intr_data;
  97
  98         if (go->boot_fw == NULL) {
  99                 if (request_firmware(&fw_entry, fw_name, go->dev)) {
 100                         v4l2_err(go, "unable to load firmware from file \"%s\"\n", fw_name);
 101                         return -1;
 102                 }
 103                 if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) {
 104                         v4l2_err(go, "file \"%s\" does not appear to be go7007 firmware\n", fw_name);
 105                         release_firmware(fw_entry);
 106                         return -1;
 107                 }
 108                 fw_len = fw_entry->size - 16;
 109                 bounce = kmemdup(fw_entry->data + 16, fw_len, GFP_KERNEL);
 110                 if (bounce == NULL) {
 111                         v4l2_err(go, "unable to allocate %d bytes for firmware transfer\n", fw_len);
 112                         release_firmware(fw_entry);
 113                         return -1;
 114                 }
 115                 release_firmware(fw_entry);
 116                 go->boot_fw_len = fw_len;
 117                 go->boot_fw = bounce;
 118         }
 119         if (go7007_interface_reset(go) < 0 ||
 120             go7007_send_firmware(go, go->boot_fw, go->boot_fw_len) < 0 ||
 121             go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
 122                         (intr_val & ~0x1) != 0x5a5a) {
 123                 v4l2_err(go, "error transferring firmware\n");
 124                 rv = -1;
 125         }
 126         return rv;
 127 }
 128
 129 MODULE_FIRMWARE("go7007/go7007fw.bin");
 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         switch (go->board_id) {
 170         case 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                 break;
 175         case GO7007_BOARDID_ADLINK_MPG24:
 176                 /* set GPIO5 to be an output, currently low */
 177                 go7007_write_addr(go, 0x3c82, 0x0000);
 178                 go7007_write_addr(go, 0x3c80, 0x00df);
 179                 break;
 180         case GO7007_BOARDID_ADS_USBAV_709:
 181                 /* GPIO pin 0: audio clock control */
 182                 /*      pin 2: TW9906 reset */
 183                 /*      pin 3: capture LED */
 184                 go7007_write_addr(go, 0x3c82, 0x000d);
 185                 go7007_write_addr(go, 0x3c80, 0x00f2);
 186                 break;
 187         }
 188         return 0;
 189 }
 190
 191 /*
 192  * Send the boot firmware to the GO7007 and configure the registers.  This
 193  * is the only way to stop the encoder once it has started streaming video.
 194  *
 195  * Must be called with the hw_lock held.
 196  */
 197 int go7007_reset_encoder(struct go7007 *go)
 198 {
 199         if (go7007_load_encoder(go) < 0)
 200                 return -1;
 201         return go7007_init_encoder(go);
 202 }
 203
 204 /*
 205  * Attempt to instantiate an I2C client by ID, probably loading a module.
 206  */
 207 static int init_i2c_module(struct i2c_adapter *adapter, const struct go_i2c *const i2c)
 208 {
 209         struct go7007 *go = i2c_get_adapdata(adapter);
 210         struct v4l2_device *v4l2_dev = &go->v4l2_dev;
 211         struct v4l2_subdev *sd;
 212         struct i2c_board_info info;
 213
 214         memset(&info, 0, sizeof(info));
 215         strlcpy(info.type, i2c->type, sizeof(info.type));
 216         info.addr = i2c->addr;
 217         info.flags = i2c->flags;
 218
 219         sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter, &info, NULL);
 220         if (sd) {
 221                 if (i2c->is_video)
 222                         go->sd_video = sd;
 223                 if (i2c->is_audio)
 224                         go->sd_audio = sd;
 225                 return 0;
 226         }
 227
 228         printk(KERN_INFO "go7007: probing for module i2c:%s failed\n", i2c->type);
 229         return -EINVAL;
 230 }
 231
 232 /*
 233  * Detach and unregister the encoder.  The go7007 struct won't be freed
 234  * until v4l2 finishes releasing its resources and all associated fds are
 235  * closed by applications.
 236  */
 237 static void go7007_remove(struct v4l2_device *v4l2_dev)
 238 {
 239         struct go7007 *go = container_of(v4l2_dev, struct go7007, v4l2_dev);
 240
 241         v4l2_device_unregister(v4l2_dev);
 242         if (go->hpi_ops->release)
 243                 go->hpi_ops->release(go);
 244         if (go->i2c_adapter_online) {
 245                 i2c_del_adapter(&go->i2c_adapter);
 246                 go->i2c_adapter_online = 0;
 247         }
 248
 249         kfree(go->boot_fw);
 250         go7007_v4l2_remove(go);
 251         kfree(go);
 252 }
 253
 254 /*
 255  * Finalize the GO7007 hardware setup, register the on-board I2C adapter
 256  * (if used on this board), load the I2C client driver for the sensor
 257  * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
 258  * interfaces.
 259  *
 260  * Must NOT be called with the hw_lock held.
 261  */
 262 int go7007_register_encoder(struct go7007 *go, unsigned num_i2c_devs)
 263 {
 264         int i, ret;
 265
 266         dev_info(go->dev, "go7007: registering new %s\n", go->name);
 267
 268         go->v4l2_dev.release = go7007_remove;
 269         ret = v4l2_device_register(go->dev, &go->v4l2_dev);
 270         if (ret < 0)
 271                 return ret;
 272
 273         mutex_lock(&go->hw_lock);
 274         ret = go7007_init_encoder(go);
 275         mutex_unlock(&go->hw_lock);
 276         if (ret < 0)
 277                 return ret;
 278
 279         ret = go7007_v4l2_ctrl_init(go);
 280         if (ret < 0)
 281                 return ret;
 282
 283         if (!go->i2c_adapter_online &&
 284                         go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
 285                 ret = go7007_i2c_init(go);
 286                 if (ret < 0)
 287                         return ret;
 288                 go->i2c_adapter_online = 1;
 289         }
 290         if (go->i2c_adapter_online) {
 291                 if (go->board_id == GO7007_BOARDID_ADS_USBAV_709) {
 292                         /* Reset the TW9906 */
 293                         go7007_write_addr(go, 0x3c82, 0x0009);
 294                         msleep(50);
 295                         go7007_write_addr(go, 0x3c82, 0x000d);
 296                 }
 297                 for (i = 0; i < num_i2c_devs; ++i)
 298                         init_i2c_module(&go->i2c_adapter, &go->board_info->i2c_devs[i]);
 299
 300                 if (go->tuner_type >= 0) {
 301                         struct tuner_setup setup = {
 302                                 .addr = ADDR_UNSET,
 303                                 .type = go->tuner_type,
 304                                 .mode_mask = T_ANALOG_TV,
 305                         };
 306
 307                         v4l2_device_call_all(&go->v4l2_dev, 0, tuner,
 308                                 s_type_addr, &setup);
 309                 }
 310                 if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
 311                         v4l2_subdev_call(go->sd_video, video, s_routing,
 312                                         0, 0, go->channel_number + 1);
 313         }
 314
 315         ret = go7007_v4l2_init(go);
 316         if (ret < 0)
 317                 return ret;
 318
 319         if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
 320                 go->audio_enabled = 1;
 321                 go7007_snd_init(go);
 322         }
 323         return 0;
 324 }
 325 EXPORT_SYMBOL(go7007_register_encoder);
 326
 327 /*
 328  * Send the encode firmware to the encoder, which will cause it
 329  * to immediately start delivering the video and audio streams.
 330  *
 331  * Must be called with the hw_lock held.
 332  */
 333 int go7007_start_encoder(struct go7007 *go)
 334 {
 335         u8 *fw;
 336         int fw_len, rv = 0, i;
 337         u16 intr_val, intr_data;
 338
 339         go->modet_enable = 0;
 340         if (!go->dvd_mode)
 341                 for (i = 0; i < 4; ++i) {
 342                         if (go->modet[i].enable) {
 343                                 go->modet_enable = 1;
 344                                 continue;
 345                         }
 346                         go->modet[i].pixel_threshold = 32767;
 347                         go->modet[i].motion_threshold = 32767;
 348                         go->modet[i].mb_threshold = 32767;
 349                 }
 350
 351         if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
 352                 return -1;
 353
 354         if (go7007_send_firmware(go, fw, fw_len) < 0 ||
 355                         go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
 356                 v4l2_err(&go->v4l2_dev, "error transferring firmware\n");
 357                 rv = -1;
 358                 goto start_error;
 359         }
 360
 361         go->state = STATE_DATA;
 362         go->parse_length = 0;
 363         go->seen_frame = 0;
 364         if (go7007_stream_start(go) < 0) {
 365                 v4l2_err(&go->v4l2_dev, "error starting stream transfer\n");
 366                 rv = -1;
 367                 goto start_error;
 368         }
 369
 370 start_error:
 371         kfree(fw);
 372         return rv;
 373 }
 374
 375 /*
 376  * Store a byte in the current video buffer, if there is one.
 377  */
 378 static inline void store_byte(struct go7007_buffer *vb, u8 byte)
 379 {
 380         if (vb && vb->vb.v4l2_planes[0].bytesused < GO7007_BUF_SIZE) {
 381                 u8 *ptr = vb2_plane_vaddr(&vb->vb, 0);
 382
 383                 ptr[vb->vb.v4l2_planes[0].bytesused++] = byte;
 384         }
 385 }
 386
 387 /*
 388  * Deliver the last video buffer and get a new one to start writing to.
 389  */
 390 static struct go7007_buffer *frame_boundary(struct go7007 *go, struct go7007_buffer *vb)
 391 {
 392         struct go7007_buffer *vb_tmp = NULL;
 393         u32 *bytesused = &vb->vb.v4l2_planes[0].bytesused;
 394         int i;
 395
 396         if (vb) {
 397                 if (vb->modet_active) {
 398                         if (*bytesused + 216 < GO7007_BUF_SIZE) {
 399                                 for (i = 0; i < 216; ++i)
 400                                         store_byte(vb, go->active_map[i]);
 401                                 *bytesused -= 216;
 402                         } else
 403                                 vb->modet_active = 0;
 404                 }
 405                 vb->vb.v4l2_buf.sequence = go->next_seq++;
 406                 v4l2_get_timestamp(&vb->vb.v4l2_buf.timestamp);
 407                 vb_tmp = vb;
 408                 spin_lock(&go->spinlock);
 409                 list_del(&vb->list);
 410                 if (list_empty(&go->vidq_active))
 411                         vb = NULL;
 412                 else
 413                         vb = list_first_entry(&go->vidq_active, struct go7007_buffer, list);
 414                 go->active_buf = vb;
 415                 spin_unlock(&go->spinlock);
 416                 vb2_buffer_done(&vb_tmp->vb, VB2_BUF_STATE_DONE);
 417                 return vb;
 418         }
 419         spin_lock(&go->spinlock);
 420         if (!list_empty(&go->vidq_active))
 421                 vb = go->active_buf =
 422                         list_first_entry(&go->vidq_active, struct go7007_buffer, list);
 423         spin_unlock(&go->spinlock);
 424         go->next_seq++;
 425         return vb;
 426 }
 427
 428 static void write_bitmap_word(struct go7007 *go)
 429 {
 430         int x, y, i, stride = ((go->width >> 4) + 7) >> 3;
 431
 432         for (i = 0; i < 16; ++i) {
 433                 y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
 434                 x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
 435                 if (stride * y + (x >> 3) < sizeof(go->active_map))
 436                         go->active_map[stride * y + (x >> 3)] |=
 437                                         (go->modet_word & 1) << (x & 0x7);
 438                 go->modet_word >>= 1;
 439         }
 440 }
 441
 442 /*
 443  * Parse a chunk of the video stream into frames.  The frames are not
 444  * delimited by the hardware, so we have to parse the frame boundaries
 445  * based on the type of video stream we're receiving.
 446  */
 447 void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
 448 {
 449         struct go7007_buffer *vb = go->active_buf;
 450         int i, seq_start_code = -1, gop_start_code = -1, frame_start_code = -1;
 451
 452         switch (go->format) {
 453         case V4L2_PIX_FMT_MPEG4:
 454                 seq_start_code = 0xB0;
 455                 gop_start_code = 0xB3;
 456                 frame_start_code = 0xB6;
 457                 break;
 458         case V4L2_PIX_FMT_MPEG1:
 459         case V4L2_PIX_FMT_MPEG2:
 460                 seq_start_code = 0xB3;
 461                 gop_start_code = 0xB8;
 462                 frame_start_code = 0x00;
 463                 break;
 464         }
 465
 466         for (i = 0; i < length; ++i) {
 467                 if (vb && vb->vb.v4l2_planes[0].bytesused >= GO7007_BUF_SIZE - 3) {
 468                         v4l2_info(&go->v4l2_dev, "dropping oversized frame\n");
 469                         vb->vb.v4l2_planes[0].bytesused = 0;
 470                         vb->frame_offset = 0;
 471                         vb->modet_active = 0;
 472                         vb = go->active_buf = NULL;
 473                 }
 474
 475                 switch (go->state) {
 476                 case STATE_DATA:
 477                         switch (buf[i]) {
 478                         case 0x00:
 479                                 go->state = STATE_00;
 480                                 break;
 481                         case 0xFF:
 482                                 go->state = STATE_FF;
 483                                 break;
 484                         default:
 485                                 store_byte(vb, buf[i]);
 486                                 break;
 487                         }
 488                         break;
 489                 case STATE_00:
 490                         switch (buf[i]) {
 491                         case 0x00:
 492                                 go->state = STATE_00_00;
 493                                 break;
 494                         case 0xFF:
 495                                 store_byte(vb, 0x00);
 496                                 go->state = STATE_FF;
 497                                 break;
 498                         default:
 499                                 store_byte(vb, 0x00);
 500                                 store_byte(vb, buf[i]);
 501                                 go->state = STATE_DATA;
 502                                 break;
 503                         }
 504                         break;
 505                 case STATE_00_00:
 506                         switch (buf[i]) {
 507                         case 0x00:
 508                                 store_byte(vb, 0x00);
 509                                 /* go->state remains STATE_00_00 */
 510                                 break;
 511                         case 0x01:
 512                                 go->state = STATE_00_00_01;
 513                                 break;
 514                         case 0xFF:
 515                                 store_byte(vb, 0x00);
 516                                 store_byte(vb, 0x00);
 517                                 go->state = STATE_FF;
 518                                 break;
 519                         default:
 520                                 store_byte(vb, 0x00);
 521                                 store_byte(vb, 0x00);
 522                                 store_byte(vb, buf[i]);
 523                                 go->state = STATE_DATA;
 524                                 break;
 525                         }
 526                         break;
 527                 case STATE_00_00_01:
 528                         if (buf[i] == 0xF8 && go->modet_enable == 0) {
 529                                 /* MODET start code, but MODET not enabled */
 530                                 store_byte(vb, 0x00);
 531                                 store_byte(vb, 0x00);
 532                                 store_byte(vb, 0x01);
 533                                 store_byte(vb, 0xF8);
 534                                 go->state = STATE_DATA;
 535                                 break;
 536                         }
 537                         /* If this is the start of a new MPEG frame,
 538                          * get a new buffer */
 539                         if ((go->format == V4L2_PIX_FMT_MPEG1 ||
 540                              go->format == V4L2_PIX_FMT_MPEG2 ||
 541                              go->format == V4L2_PIX_FMT_MPEG4) &&
 542                             (buf[i] == seq_start_code ||
 543                              buf[i] == gop_start_code ||
 544                              buf[i] == frame_start_code)) {
 545                                 if (vb == NULL || go->seen_frame)
 546                                         vb = frame_boundary(go, vb);
 547                                 go->seen_frame = buf[i] == frame_start_code;
 548                                 if (vb && go->seen_frame)
 549                                         vb->frame_offset = vb->vb.v4l2_planes[0].bytesused;
 550                         }
 551                         /* Handle any special chunk types, or just write the
 552                          * start code to the (potentially new) buffer */
 553                         switch (buf[i]) {
 554                         case 0xF5: /* timestamp */
 555                                 go->parse_length = 12;
 556                                 go->state = STATE_UNPARSED;
 557                                 break;
 558                         case 0xF6: /* vbi */
 559                                 go->state = STATE_VBI_LEN_A;
 560                                 break;
 561                         case 0xF8: /* MD map */
 562                                 go->parse_length = 0;
 563                                 memset(go->active_map, 0,
 564                                                 sizeof(go->active_map));
 565                                 go->state = STATE_MODET_MAP;
 566                                 break;
 567                         case 0xFF: /* Potential JPEG start code */
 568                                 store_byte(vb, 0x00);
 569                                 store_byte(vb, 0x00);
 570                                 store_byte(vb, 0x01);
 571                                 go->state = STATE_FF;
 572                                 break;
 573                         default:
 574                                 store_byte(vb, 0x00);
 575                                 store_byte(vb, 0x00);
 576                                 store_byte(vb, 0x01);
 577                                 store_byte(vb, buf[i]);
 578                                 go->state = STATE_DATA;
 579                                 break;
 580                         }
 581                         break;
 582                 case STATE_FF:
 583                         switch (buf[i]) {
 584                         case 0x00:
 585                                 store_byte(vb, 0xFF);
 586                                 go->state = STATE_00;
 587                                 break;
 588                         case 0xFF:
 589                                 store_byte(vb, 0xFF);
 590                                 /* go->state remains STATE_FF */
 591                                 break;
 592                         case 0xD8:
 593                                 if (go->format == V4L2_PIX_FMT_MJPEG)
 594                                         vb = frame_boundary(go, vb);
 595                                 /* fall through */
 596                         default:
 597                                 store_byte(vb, 0xFF);
 598                                 store_byte(vb, buf[i]);
 599                                 go->state = STATE_DATA;
 600                                 break;
 601                         }
 602                         break;
 603                 case STATE_VBI_LEN_A:
 604                         go->parse_length = buf[i] << 8;
 605                         go->state = STATE_VBI_LEN_B;
 606                         break;
 607                 case STATE_VBI_LEN_B:
 608                         go->parse_length |= buf[i];
 609                         if (go->parse_length > 0)
 610                                 go->state = STATE_UNPARSED;
 611                         else
 612                                 go->state = STATE_DATA;
 613                         break;
 614                 case STATE_MODET_MAP:
 615                         if (go->parse_length < 204) {
 616                                 if (go->parse_length & 1) {
 617                                         go->modet_word |= buf[i];
 618                                         write_bitmap_word(go);
 619                                 } else
 620                                         go->modet_word = buf[i] << 8;
 621                         } else if (go->parse_length == 207 && vb) {
 622                                 vb->modet_active = buf[i];
 623                         }
 624                         if (++go->parse_length == 208)
 625                                 go->state = STATE_DATA;
 626                         break;
 627                 case STATE_UNPARSED:
 628                         if (--go->parse_length == 0)
 629                                 go->state = STATE_DATA;
 630                         break;
 631                 }
 632         }
 633 }
 634 EXPORT_SYMBOL(go7007_parse_video_stream);
 635
 636 /*
 637  * Allocate a new go7007 struct.  Used by the hardware-specific probe.
 638  */
 639 struct go7007 *go7007_alloc(const struct go7007_board_info *board,
 640                                                 struct device *dev)
 641 {
 642         struct go7007 *go;
 643         int i;
 644
 645         go = kzalloc(sizeof(struct go7007), GFP_KERNEL);
 646         if (go == NULL)
 647                 return NULL;
 648         go->dev = dev;
 649         go->board_info = board;
 650         go->board_id = 0;
 651         go->tuner_type = -1;
 652         go->channel_number = 0;
 653         go->name[0] = 0;
 654         mutex_init(&go->hw_lock);
 655         init_waitqueue_head(&go->frame_waitq);
 656         spin_lock_init(&go->spinlock);
 657         go->status = STATUS_INIT;
 658         memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
 659         go->i2c_adapter_online = 0;
 660         go->interrupt_available = 0;
 661         init_waitqueue_head(&go->interrupt_waitq);
 662         go->input = 0;
 663         go7007_update_board(go);
 664         go->encoder_h_halve = 0;
 665         go->encoder_v_halve = 0;
 666         go->encoder_subsample = 0;
 667         go->format = V4L2_PIX_FMT_MJPEG;
 668         go->bitrate = 1500000;
 669         go->fps_scale = 1;
 670         go->pali = 0;
 671         go->aspect_ratio = GO7007_RATIO_1_1;
 672         go->gop_size = 0;
 673         go->ipb = 0;
 674         go->closed_gop = 0;
 675         go->repeat_seqhead = 0;
 676         go->seq_header_enable = 0;
 677         go->gop_header_enable = 0;
 678         go->dvd_mode = 0;
 679         go->interlace_coding = 0;
 680         for (i = 0; i < 4; ++i)
 681                 go->modet[i].enable = 0;
 682         for (i = 0; i < 1624; ++i)
 683                 go->modet_map[i] = 0;
 684         go->audio_deliver = NULL;
 685         go->audio_enabled = 0;
 686
 687         return go;
 688 }
 689 EXPORT_SYMBOL(go7007_alloc);
 690
 691 void go7007_update_board(struct go7007 *go)
 692 {
 693         const struct go7007_board_info *board = go->board_info;
 694
 695         if (board->sensor_flags & GO7007_SENSOR_TV) {
 696                 go->standard = GO7007_STD_NTSC;
 697                 go->std = V4L2_STD_NTSC_M;
 698                 go->width = 720;
 699                 go->height = 480;
 700                 go->sensor_framerate = 30000;
 701         } else {
 702                 go->standard = GO7007_STD_OTHER;
 703                 go->width = board->sensor_width;
 704                 go->height = board->sensor_height;
 705                 go->sensor_framerate = board->sensor_framerate;
 706         }
 707         go->encoder_v_offset = board->sensor_v_offset;
 708         go->encoder_h_offset = board->sensor_h_offset;
 709 }
 710 EXPORT_SYMBOL(go7007_update_board);
 711
 712 MODULE_LICENSE("GPL v2");