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/delay.h>
  20 #include <linux/sched.h>
  21 #include <linux/spinlock.h>
  22 #include <linux/unistd.h>
  23 #include <linux/time.h>
  24 #include <linux/mm.h>
  25 #include <linux/vmalloc.h>
  26 #include <linux/device.h>
  27 #include <linux/i2c.h>
  28 #include <linux/firmware.h>
  29 #include <linux/mutex.h>
  30 #include <linux/uaccess.h>
  31 #include <linux/slab.h>
  32 #include <linux/videodev2.h>
  33 #include <media/tuner.h>
  34 #include <media/v4l2-common.h>
  35
  36 #include "go7007-priv.h"
  37
  38 /*
  39  * Wait for an interrupt to be delivered from the GO7007SB and return
  40  * the associated value and data.
  41  *
  42  * Must be called with the hw_lock held.
  43  */
  44 int go7007_read_interrupt(struct go7007 *go, u16 *value, u16 *data)
  45 {
  46         go->interrupt_available = 0;
  47         go->hpi_ops->read_interrupt(go);
  48         if (wait_event_timeout(go->interrupt_waitq,
  49                                 go->interrupt_available, 5*HZ) < 0) {
  50                 v4l2_err(&go->v4l2_dev, "timeout waiting for read interrupt\n");
  51                 return -1;
  52         }
  53         if (!go->interrupt_available)
  54                 return -1;
  55         go->interrupt_available = 0;
  56         *value = go->interrupt_value & 0xfffe;
  57         *data = go->interrupt_data;
  58         return 0;
  59 }
  60 EXPORT_SYMBOL(go7007_read_interrupt);
  61
  62 /*
  63  * Read a register/address on the GO7007SB.
  64  *
  65  * Must be called with the hw_lock held.
  66  */
  67 int go7007_read_addr(struct go7007 *go, u16 addr, u16 *data)
  68 {
  69         int count = 100;
  70         u16 value;
  71
  72         if (go7007_write_interrupt(go, 0x0010, addr) < 0)
  73                 return -EIO;
  74         while (count-- > 0) {
  75                 if (go7007_read_interrupt(go, &value, data) == 0 &&
  76                                 value == 0xa000)
  77                         return 0;
  78         }
  79         return -EIO;
  80 }
  81 EXPORT_SYMBOL(go7007_read_addr);
  82
  83 /*
  84  * Send the boot firmware to the encoder, which just wakes it up and lets
  85  * us talk to the GPIO pins and on-board I2C adapter.
  86  *
  87  * Must be called with the hw_lock held.
  88  */
  89 static int go7007_load_encoder(struct go7007 *go)
  90 {
  91         const struct firmware *fw_entry;
  92         char fw_name[] = "go7007/go7007fw.bin";
  93         void *bounce;
  94         int fw_len, rv = 0;
  95         u16 intr_val, intr_data;
  96
  97         if (go->boot_fw == NULL) {
  98                 if (request_firmware(&fw_entry, fw_name, go->dev)) {
  99                         v4l2_err(go, "unable to load firmware from file \"%s\"\n", fw_name);
 100                         return -1;
 101                 }
 102                 if (fw_entry->size < 16 || memcmp(fw_entry->data, "WISGO7007FW", 11)) {
 103                         v4l2_err(go, "file \"%s\" does not appear to be go7007 firmware\n", fw_name);
 104                         release_firmware(fw_entry);
 105                         return -1;
 106                 }
 107                 fw_len = fw_entry->size - 16;
 108                 bounce = kmemdup(fw_entry->data + 16, fw_len, GFP_KERNEL);
 109                 if (bounce == NULL) {
 110                         v4l2_err(go, "unable to allocate %d bytes for firmware transfer\n", fw_len);
 111                         release_firmware(fw_entry);
 112                         return -1;
 113                 }
 114                 release_firmware(fw_entry);
 115                 go->boot_fw_len = fw_len;
 116                 go->boot_fw = bounce;
 117         }
 118         if (go7007_interface_reset(go) < 0 ||
 119             go7007_send_firmware(go, go->boot_fw, go->boot_fw_len) < 0 ||
 120             go7007_read_interrupt(go, &intr_val, &intr_data) < 0 ||
 121                         (intr_val & ~0x1) != 0x5a5a) {
 122                 v4l2_err(go, "error transferring firmware\n");
 123                 rv = -1;
 124         }
 125         return rv;
 126 }
 127
 128 MODULE_FIRMWARE("go7007/go7007fw.bin");
 129
 130 /*
 131  * Boot the encoder and register the I2C adapter if requested.  Do the
 132  * minimum initialization necessary, since the board-specific code may
 133  * still need to probe the board ID.
 134  *
 135  * Must NOT be called with the hw_lock held.
 136  */
 137 int go7007_boot_encoder(struct go7007 *go, int init_i2c)
 138 {
 139         int ret;
 140
 141         mutex_lock(&go->hw_lock);
 142         ret = go7007_load_encoder(go);
 143         mutex_unlock(&go->hw_lock);
 144         if (ret < 0)
 145                 return -1;
 146         if (!init_i2c)
 147                 return 0;
 148         if (go7007_i2c_init(go) < 0)
 149                 return -1;
 150         go->i2c_adapter_online = 1;
 151         return 0;
 152 }
 153 EXPORT_SYMBOL(go7007_boot_encoder);
 154
 155 /*
 156  * Configure any hardware-related registers in the GO7007, such as GPIO
 157  * pins and bus parameters, which are board-specific.  This assumes
 158  * the boot firmware has already been downloaded.
 159  *
 160  * Must be called with the hw_lock held.
 161  */
 162 static int go7007_init_encoder(struct go7007 *go)
 163 {
 164         if (go->board_info->audio_flags & GO7007_AUDIO_I2S_MASTER) {
 165                 go7007_write_addr(go, 0x1000, 0x0811);
 166                 go7007_write_addr(go, 0x1000, 0x0c11);
 167         }
 168         switch (go->board_id) {
 169         case 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                 break;
 174         case GO7007_BOARDID_ADLINK_MPG24:
 175                 /* set GPIO5 to be an output, currently low */
 176                 go7007_write_addr(go, 0x3c82, 0x0000);
 177                 go7007_write_addr(go, 0x3c80, 0x00df);
 178                 break;
 179         case GO7007_BOARDID_ADS_USBAV_709:
 180                 /* GPIO pin 0: audio clock control */
 181                 /*      pin 2: TW9906 reset */
 182                 /*      pin 3: capture LED */
 183                 go7007_write_addr(go, 0x3c82, 0x000d);
 184                 go7007_write_addr(go, 0x3c80, 0x00f2);
 185                 break;
 186         }
 187         return 0;
 188 }
 189
 190 /*
 191  * Send the boot firmware to the GO7007 and configure the registers.  This
 192  * is the only way to stop the encoder once it has started streaming video.
 193  *
 194  * Must be called with the hw_lock held.
 195  */
 196 int go7007_reset_encoder(struct go7007 *go)
 197 {
 198         if (go7007_load_encoder(go) < 0)
 199                 return -1;
 200         return go7007_init_encoder(go);
 201 }
 202
 203 /*
 204  * Attempt to instantiate an I2C client by ID, probably loading a module.
 205  */
 206 static int init_i2c_module(struct i2c_adapter *adapter, const struct go_i2c *const i2c)
 207 {
 208         struct go7007 *go = i2c_get_adapdata(adapter);
 209         struct v4l2_device *v4l2_dev = &go->v4l2_dev;
 210         struct v4l2_subdev *sd;
 211         struct i2c_board_info info;
 212
 213         memset(&info, 0, sizeof(info));
 214         strlcpy(info.type, i2c->type, sizeof(info.type));
 215         info.addr = i2c->addr;
 216         info.flags = i2c->flags;
 217
 218         sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter, &info, NULL);
 219         if (sd) {
 220                 if (i2c->is_video)
 221                         go->sd_video = sd;
 222                 if (i2c->is_audio)
 223                         go->sd_audio = sd;
 224                 return 0;
 225         }
 226
 227         printk(KERN_INFO "go7007: probing for module i2c:%s failed\n", i2c->type);
 228         return -EINVAL;
 229 }
 230
 231 /*
 232  * Detach and unregister the encoder.  The go7007 struct won't be freed
 233  * until v4l2 finishes releasing its resources and all associated fds are
 234  * closed by applications.
 235  */
 236 static void go7007_remove(struct v4l2_device *v4l2_dev)
 237 {
 238         struct go7007 *go = container_of(v4l2_dev, struct go7007, v4l2_dev);
 239
 240         v4l2_device_unregister(v4l2_dev);
 241         if (go->hpi_ops->release)
 242                 go->hpi_ops->release(go);
 243         if (go->i2c_adapter_online) {
 244                 i2c_del_adapter(&go->i2c_adapter);
 245                 go->i2c_adapter_online = 0;
 246         }
 247
 248         kfree(go->boot_fw);
 249         go7007_v4l2_remove(go);
 250         kfree(go);
 251 }
 252
 253 /*
 254  * Finalize the GO7007 hardware setup, register the on-board I2C adapter
 255  * (if used on this board), load the I2C client driver for the sensor
 256  * (SAA7115 or whatever) and other devices, and register the ALSA and V4L2
 257  * interfaces.
 258  *
 259  * Must NOT be called with the hw_lock held.
 260  */
 261 int go7007_register_encoder(struct go7007 *go, unsigned num_i2c_devs)
 262 {
 263         int i, ret;
 264
 265         dev_info(go->dev, "go7007: registering new %s\n", go->name);
 266
 267         go->v4l2_dev.release = go7007_remove;
 268         ret = v4l2_device_register(go->dev, &go->v4l2_dev);
 269         if (ret < 0)
 270                 return ret;
 271
 272         mutex_lock(&go->hw_lock);
 273         ret = go7007_init_encoder(go);
 274         mutex_unlock(&go->hw_lock);
 275         if (ret < 0)
 276                 return ret;
 277
 278         ret = go7007_v4l2_ctrl_init(go);
 279         if (ret < 0)
 280                 return ret;
 281
 282         if (!go->i2c_adapter_online &&
 283                         go->board_info->flags & GO7007_BOARD_USE_ONBOARD_I2C) {
 284                 ret = go7007_i2c_init(go);
 285                 if (ret < 0)
 286                         return ret;
 287                 go->i2c_adapter_online = 1;
 288         }
 289         if (go->i2c_adapter_online) {
 290                 if (go->board_id == GO7007_BOARDID_ADS_USBAV_709) {
 291                         /* Reset the TW9906 */
 292                         go7007_write_addr(go, 0x3c82, 0x0009);
 293                         msleep(50);
 294                         go7007_write_addr(go, 0x3c82, 0x000d);
 295                 }
 296                 for (i = 0; i < num_i2c_devs; ++i)
 297                         init_i2c_module(&go->i2c_adapter, &go->board_info->i2c_devs[i]);
 298
 299                 if (go->tuner_type >= 0) {
 300                         struct tuner_setup setup = {
 301                                 .addr = ADDR_UNSET,
 302                                 .type = go->tuner_type,
 303                                 .mode_mask = T_ANALOG_TV,
 304                         };
 305
 306                         v4l2_device_call_all(&go->v4l2_dev, 0, tuner,
 307                                 s_type_addr, &setup);
 308                 }
 309                 if (go->board_id == GO7007_BOARDID_ADLINK_MPG24)
 310                         v4l2_subdev_call(go->sd_video, video, s_routing,
 311                                         0, 0, go->channel_number + 1);
 312         }
 313
 314         ret = go7007_v4l2_init(go);
 315         if (ret < 0)
 316                 return ret;
 317
 318         if (go->board_info->flags & GO7007_BOARD_HAS_AUDIO) {
 319                 go->audio_enabled = 1;
 320                 go7007_snd_init(go);
 321         }
 322         return 0;
 323 }
 324 EXPORT_SYMBOL(go7007_register_encoder);
 325
 326 /*
 327  * Send the encode firmware to the encoder, which will cause it
 328  * to immediately start delivering the video and audio streams.
 329  *
 330  * Must be called with the hw_lock held.
 331  */
 332 int go7007_start_encoder(struct go7007 *go)
 333 {
 334         u8 *fw;
 335         int fw_len, rv = 0, i;
 336         u16 intr_val, intr_data;
 337
 338         go->modet_enable = 0;
 339         if (!go->dvd_mode)
 340                 for (i = 0; i < 4; ++i) {
 341                         if (go->modet[i].enable) {
 342                                 go->modet_enable = 1;
 343                                 continue;
 344                         }
 345                         go->modet[i].pixel_threshold = 32767;
 346                         go->modet[i].motion_threshold = 32767;
 347                         go->modet[i].mb_threshold = 32767;
 348                 }
 349
 350         if (go7007_construct_fw_image(go, &fw, &fw_len) < 0)
 351                 return -1;
 352
 353         if (go7007_send_firmware(go, fw, fw_len) < 0 ||
 354                         go7007_read_interrupt(go, &intr_val, &intr_data) < 0) {
 355                 v4l2_err(&go->v4l2_dev, "error transferring firmware\n");
 356                 rv = -1;
 357                 goto start_error;
 358         }
 359
 360         go->state = STATE_DATA;
 361         go->parse_length = 0;
 362         go->seen_frame = 0;
 363         if (go7007_stream_start(go) < 0) {
 364                 v4l2_err(&go->v4l2_dev, "error starting stream transfer\n");
 365                 rv = -1;
 366                 goto start_error;
 367         }
 368
 369 start_error:
 370         kfree(fw);
 371         return rv;
 372 }
 373
 374 /*
 375  * Store a byte in the current video buffer, if there is one.
 376  */
 377 static inline void store_byte(struct go7007_buffer *vb, u8 byte)
 378 {
 379         if (vb && vb->vb.v4l2_planes[0].bytesused < GO7007_BUF_SIZE) {
 380                 u8 *ptr = vb2_plane_vaddr(&vb->vb, 0);
 381
 382                 ptr[vb->vb.v4l2_planes[0].bytesused++] = byte;
 383         }
 384 }
 385
 386 /*
 387  * Deliver the last video buffer and get a new one to start writing to.
 388  */
 389 static struct go7007_buffer *frame_boundary(struct go7007 *go, struct go7007_buffer *vb)
 390 {
 391         struct go7007_buffer *vb_tmp = NULL;
 392         u32 *bytesused = &vb->vb.v4l2_planes[0].bytesused;
 393         int i;
 394
 395         if (vb) {
 396                 if (vb->modet_active) {
 397                         if (*bytesused + 216 < GO7007_BUF_SIZE) {
 398                                 for (i = 0; i < 216; ++i)
 399                                         store_byte(vb, go->active_map[i]);
 400                                 *bytesused -= 216;
 401                         } else
 402                                 vb->modet_active = 0;
 403                 }
 404                 vb->vb.v4l2_buf.sequence = go->next_seq++;
 405                 v4l2_get_timestamp(&vb->vb.v4l2_buf.timestamp);
 406                 vb_tmp = vb;
 407                 spin_lock(&go->spinlock);
 408                 list_del(&vb->list);
 409                 if (list_empty(&go->vidq_active))
 410                         vb = NULL;
 411                 else
 412                         vb = list_first_entry(&go->vidq_active, struct go7007_buffer, list);
 413                 go->active_buf = vb;
 414                 spin_unlock(&go->spinlock);
 415                 vb2_buffer_done(&vb_tmp->vb, VB2_BUF_STATE_DONE);
 416                 return vb;
 417         }
 418         spin_lock(&go->spinlock);
 419         if (!list_empty(&go->vidq_active))
 420                 vb = go->active_buf =
 421                         list_first_entry(&go->vidq_active, struct go7007_buffer, list);
 422         spin_unlock(&go->spinlock);
 423         go->next_seq++;
 424         return vb;
 425 }
 426
 427 static void write_bitmap_word(struct go7007 *go)
 428 {
 429         int x, y, i, stride = ((go->width >> 4) + 7) >> 3;
 430
 431         for (i = 0; i < 16; ++i) {
 432                 y = (((go->parse_length - 1) << 3) + i) / (go->width >> 4);
 433                 x = (((go->parse_length - 1) << 3) + i) % (go->width >> 4);
 434                 if (stride * y + (x >> 3) < sizeof(go->active_map))
 435                         go->active_map[stride * y + (x >> 3)] |=
 436                                         (go->modet_word & 1) << (x & 0x7);
 437                 go->modet_word >>= 1;
 438         }
 439 }
 440
 441 /*
 442  * Parse a chunk of the video stream into frames.  The frames are not
 443  * delimited by the hardware, so we have to parse the frame boundaries
 444  * based on the type of video stream we're receiving.
 445  */
 446 void go7007_parse_video_stream(struct go7007 *go, u8 *buf, int length)
 447 {
 448         struct go7007_buffer *vb = go->active_buf;
 449         int i, seq_start_code = -1, gop_start_code = -1, frame_start_code = -1;
 450
 451         switch (go->format) {
 452         case V4L2_PIX_FMT_MPEG4:
 453                 seq_start_code = 0xB0;
 454                 gop_start_code = 0xB3;
 455                 frame_start_code = 0xB6;
 456                 break;
 457         case V4L2_PIX_FMT_MPEG1:
 458         case V4L2_PIX_FMT_MPEG2:
 459                 seq_start_code = 0xB3;
 460                 gop_start_code = 0xB8;
 461                 frame_start_code = 0x00;
 462                 break;
 463         }
 464
 465         for (i = 0; i < length; ++i) {
 466                 if (vb && vb->vb.v4l2_planes[0].bytesused >= GO7007_BUF_SIZE - 3) {
 467                         v4l2_info(&go->v4l2_dev, "dropping oversized frame\n");
 468                         vb->vb.v4l2_planes[0].bytesused = 0;
 469                         vb->frame_offset = 0;
 470                         vb->modet_active = 0;
 471                         vb = go->active_buf = NULL;
 472                 }
 473
 474                 switch (go->state) {
 475                 case STATE_DATA:
 476                         switch (buf[i]) {
 477                         case 0x00:
 478                                 go->state = STATE_00;
 479                                 break;
 480                         case 0xFF:
 481                                 go->state = STATE_FF;
 482                                 break;
 483                         default:
 484                                 store_byte(vb, buf[i]);
 485                                 break;
 486                         }
 487                         break;
 488                 case STATE_00:
 489                         switch (buf[i]) {
 490                         case 0x00:
 491                                 go->state = STATE_00_00;
 492                                 break;
 493                         case 0xFF:
 494                                 store_byte(vb, 0x00);
 495                                 go->state = STATE_FF;
 496                                 break;
 497                         default:
 498                                 store_byte(vb, 0x00);
 499                                 store_byte(vb, buf[i]);
 500                                 go->state = STATE_DATA;
 501                                 break;
 502                         }
 503                         break;
 504                 case STATE_00_00:
 505                         switch (buf[i]) {
 506                         case 0x00:
 507                                 store_byte(vb, 0x00);
 508                                 /* go->state remains STATE_00_00 */
 509                                 break;
 510                         case 0x01:
 511                                 go->state = STATE_00_00_01;
 512                                 break;
 513                         case 0xFF:
 514                                 store_byte(vb, 0x00);
 515                                 store_byte(vb, 0x00);
 516                                 go->state = STATE_FF;
 517                                 break;
 518                         default:
 519                                 store_byte(vb, 0x00);
 520                                 store_byte(vb, 0x00);
 521                                 store_byte(vb, buf[i]);
 522                                 go->state = STATE_DATA;
 523                                 break;
 524                         }
 525                         break;
 526                 case STATE_00_00_01:
 527                         if (buf[i] == 0xF8 && go->modet_enable == 0) {
 528                                 /* MODET start code, but MODET not enabled */
 529                                 store_byte(vb, 0x00);
 530                                 store_byte(vb, 0x00);
 531                                 store_byte(vb, 0x01);
 532                                 store_byte(vb, 0xF8);
 533                                 go->state = STATE_DATA;
 534                                 break;
 535                         }
 536                         /* If this is the start of a new MPEG frame,
 537                          * get a new buffer */
 538                         if ((go->format == V4L2_PIX_FMT_MPEG1 ||
 539                              go->format == V4L2_PIX_FMT_MPEG2 ||
 540                              go->format == V4L2_PIX_FMT_MPEG4) &&
 541                             (buf[i] == seq_start_code ||
 542                              buf[i] == gop_start_code ||
 543                              buf[i] == frame_start_code)) {
 544                                 if (vb == NULL || go->seen_frame)
 545                                         vb = frame_boundary(go, vb);
 546                                 go->seen_frame = buf[i] == frame_start_code;
 547                                 if (vb && go->seen_frame)
 548                                         vb->frame_offset = vb->vb.v4l2_planes[0].bytesused;
 549                         }
 550                         /* Handle any special chunk types, or just write the
 551                          * start code to the (potentially new) buffer */
 552                         switch (buf[i]) {
 553                         case 0xF5: /* timestamp */
 554                                 go->parse_length = 12;
 555                                 go->state = STATE_UNPARSED;
 556                                 break;
 557                         case 0xF6: /* vbi */
 558                                 go->state = STATE_VBI_LEN_A;
 559                                 break;
 560                         case 0xF8: /* MD map */
 561                                 go->parse_length = 0;
 562                                 memset(go->active_map, 0,
 563                                                 sizeof(go->active_map));
 564                                 go->state = STATE_MODET_MAP;
 565                                 break;
 566                         case 0xFF: /* Potential JPEG start code */
 567                                 store_byte(vb, 0x00);
 568                                 store_byte(vb, 0x00);
 569                                 store_byte(vb, 0x01);
 570                                 go->state = STATE_FF;
 571                                 break;
 572                         default:
 573                                 store_byte(vb, 0x00);
 574                                 store_byte(vb, 0x00);
 575                                 store_byte(vb, 0x01);
 576                                 store_byte(vb, buf[i]);
 577                                 go->state = STATE_DATA;
 578                                 break;
 579                         }
 580                         break;
 581                 case STATE_FF:
 582                         switch (buf[i]) {
 583                         case 0x00:
 584                                 store_byte(vb, 0xFF);
 585                                 go->state = STATE_00;
 586                                 break;
 587                         case 0xFF:
 588                                 store_byte(vb, 0xFF);
 589                                 /* go->state remains STATE_FF */
 590                                 break;
 591                         case 0xD8:
 592                                 if (go->format == V4L2_PIX_FMT_MJPEG)
 593                                         vb = frame_boundary(go, vb);
 594                                 /* fall through */
 595                         default:
 596                                 store_byte(vb, 0xFF);
 597                                 store_byte(vb, buf[i]);
 598                                 go->state = STATE_DATA;
 599                                 break;
 600                         }
 601                         break;
 602                 case STATE_VBI_LEN_A:
 603                         go->parse_length = buf[i] << 8;
 604                         go->state = STATE_VBI_LEN_B;
 605                         break;
 606                 case STATE_VBI_LEN_B:
 607                         go->parse_length |= buf[i];
 608                         if (go->parse_length > 0)
 609                                 go->state = STATE_UNPARSED;
 610                         else
 611                                 go->state = STATE_DATA;
 612                         break;
 613                 case STATE_MODET_MAP:
 614                         if (go->parse_length < 204) {
 615                                 if (go->parse_length & 1) {
 616                                         go->modet_word |= buf[i];
 617                                         write_bitmap_word(go);
 618                                 } else
 619                                         go->modet_word = buf[i] << 8;
 620                         } else if (go->parse_length == 207 && vb) {
 621                                 vb->modet_active = buf[i];
 622                         }
 623                         if (++go->parse_length == 208)
 624                                 go->state = STATE_DATA;
 625                         break;
 626                 case STATE_UNPARSED:
 627                         if (--go->parse_length == 0)
 628                                 go->state = STATE_DATA;
 629                         break;
 630                 }
 631         }
 632 }
 633 EXPORT_SYMBOL(go7007_parse_video_stream);
 634
 635 /*
 636  * Allocate a new go7007 struct.  Used by the hardware-specific probe.
 637  */
 638 struct go7007 *go7007_alloc(const struct go7007_board_info *board,
 639                                                 struct device *dev)
 640 {
 641         struct go7007 *go;
 642         int i;
 643
 644         go = kzalloc(sizeof(struct go7007), GFP_KERNEL);
 645         if (go == NULL)
 646                 return NULL;
 647         go->dev = dev;
 648         go->board_info = board;
 649         go->board_id = 0;
 650         go->tuner_type = -1;
 651         go->channel_number = 0;
 652         go->name[0] = 0;
 653         mutex_init(&go->hw_lock);
 654         init_waitqueue_head(&go->frame_waitq);
 655         spin_lock_init(&go->spinlock);
 656         go->status = STATUS_INIT;
 657         memset(&go->i2c_adapter, 0, sizeof(go->i2c_adapter));
 658         go->i2c_adapter_online = 0;
 659         go->interrupt_available = 0;
 660         init_waitqueue_head(&go->interrupt_waitq);
 661         go->input = 0;
 662         go7007_update_board(go);
 663         go->encoder_h_halve = 0;
 664         go->encoder_v_halve = 0;
 665         go->encoder_subsample = 0;
 666         go->format = V4L2_PIX_FMT_MJPEG;
 667         go->bitrate = 1500000;
 668         go->fps_scale = 1;
 669         go->pali = 0;
 670         go->aspect_ratio = GO7007_RATIO_1_1;
 671         go->gop_size = 0;
 672         go->ipb = 0;
 673         go->closed_gop = 0;
 674         go->repeat_seqhead = 0;
 675         go->seq_header_enable = 0;
 676         go->gop_header_enable = 0;
 677         go->dvd_mode = 0;
 678         go->interlace_coding = 0;
 679         for (i = 0; i < 4; ++i)
 680                 go->modet[i].enable = 0;
 681         for (i = 0; i < 1624; ++i)
 682                 go->modet_map[i] = 0;
 683         go->audio_deliver = NULL;
 684         go->audio_enabled = 0;
 685
 686         return go;
 687 }
 688 EXPORT_SYMBOL(go7007_alloc);
 689
 690 void go7007_update_board(struct go7007 *go)
 691 {
 692         const struct go7007_board_info *board = go->board_info;
 693
 694         if (board->sensor_flags & GO7007_SENSOR_TV) {
 695                 go->standard = GO7007_STD_NTSC;
 696                 go->std = V4L2_STD_NTSC_M;
 697                 go->width = 720;
 698                 go->height = 480;
 699                 go->sensor_framerate = 30000;
 700         } else {
 701                 go->standard = GO7007_STD_OTHER;
 702                 go->width = board->sensor_width;
 703                 go->height = board->sensor_height;
 704                 go->sensor_framerate = board->sensor_framerate;
 705         }
 706         go->encoder_v_offset = board->sensor_v_offset;
 707         go->encoder_h_offset = board->sensor_h_offset;
 708 }
 709 EXPORT_SYMBOL(go7007_update_board);
 710
 711 MODULE_LICENSE("GPL v2");