1/* 2 * usbvision-core.c - driver for NT100x USB video capture devices 3 * 4 * 5 * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de> 6 * Dwaine Garden <dwainegarden@rogers.com> 7 * 8 * This module is part of usbvision driver project. 9 * Updates to driver completed by Dwaine P. Garden 10 * 11 * This program is free software; you can redistribute it and/or modify 12 * it under the terms of the GNU General Public License as published by 13 * the Free Software Foundation; either version 2 of the License, or 14 * (at your option) any later version. 15 * 16 * This program is distributed in the hope that it will be useful, 17 * but WITHOUT ANY WARRANTY; without even the implied warranty of 18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 */ 25 26#include <linux/kernel.h> 27#include <linux/list.h> 28#include <linux/timer.h> 29#include <linux/gfp.h> 30#include <linux/mm.h> 31#include <linux/highmem.h> 32#include <linux/vmalloc.h> 33#include <linux/module.h> 34#include <linux/init.h> 35#include <linux/spinlock.h> 36#include <linux/io.h> 37#include <linux/videodev2.h> 38#include <linux/i2c.h> 39 40#include <media/saa7115.h> 41#include <media/v4l2-common.h> 42#include <media/tuner.h> 43 44#include <linux/workqueue.h> 45 46#include "usbvision.h" 47 48static unsigned int core_debug; 49module_param(core_debug, int, 0644); 50MODULE_PARM_DESC(core_debug, "enable debug messages [core]"); 51 52static int adjust_compression = 1; /* Set the compression to be adaptive */ 53module_param(adjust_compression, int, 0444); 54MODULE_PARM_DESC(adjust_compression, " Set the ADPCM compression for the device. Default: 1 (On)"); 55 56/* To help people with Black and White output with using s-video input. 57 * Some cables and input device are wired differently. */ 58static int switch_svideo_input; 59module_param(switch_svideo_input, int, 0444); 60MODULE_PARM_DESC(switch_svideo_input, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)"); 61 62static unsigned int adjust_x_offset = -1; 63module_param(adjust_x_offset, int, 0644); 64MODULE_PARM_DESC(adjust_x_offset, "adjust X offset display [core]"); 65 66static unsigned int adjust_y_offset = -1; 67module_param(adjust_y_offset, int, 0644); 68MODULE_PARM_DESC(adjust_y_offset, "adjust Y offset display [core]"); 69 70 71#define ENABLE_HEXDUMP 0 /* Enable if you need it */ 72 73 74#ifdef USBVISION_DEBUG 75 #define PDEBUG(level, fmt, args...) { \ 76 if (core_debug & (level)) \ 77 printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \ 78 __func__, __LINE__ , ## args); \ 79 } 80#else 81 #define PDEBUG(level, fmt, args...) do {} while (0) 82#endif 83 84#define DBG_HEADER (1 << 0) 85#define DBG_IRQ (1 << 1) 86#define DBG_ISOC (1 << 2) 87#define DBG_PARSE (1 << 3) 88#define DBG_SCRATCH (1 << 4) 89#define DBG_FUNC (1 << 5) 90 91static const int max_imgwidth = MAX_FRAME_WIDTH; 92static const int max_imgheight = MAX_FRAME_HEIGHT; 93static const int min_imgwidth = MIN_FRAME_WIDTH; 94static const int min_imgheight = MIN_FRAME_HEIGHT; 95 96/* The value of 'scratch_buf_size' affects quality of the picture 97 * in many ways. Shorter buffers may cause loss of data when client 98 * is too slow. Larger buffers are memory-consuming and take longer 99 * to work with. This setting can be adjusted, but the default value 100 * should be OK for most desktop users. 101 */ 102#define DEFAULT_SCRATCH_BUF_SIZE (0x20000) /* 128kB memory scratch buffer */ 103static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE; 104 105/* Function prototypes */ 106static int usbvision_request_intra(struct usb_usbvision *usbvision); 107static int usbvision_unrequest_intra(struct usb_usbvision *usbvision); 108static int usbvision_adjust_compression(struct usb_usbvision *usbvision); 109static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision); 110 111/*******************************/ 112/* Memory management functions */ 113/*******************************/ 114 115/* 116 * Here we want the physical address of the memory. 117 * This is used when initializing the contents of the area. 118 */ 119 120static void *usbvision_rvmalloc(unsigned long size) 121{ 122 void *mem; 123 unsigned long adr; 124 125 size = PAGE_ALIGN(size); 126 mem = vmalloc_32(size); 127 if (!mem) 128 return NULL; 129 130 memset(mem, 0, size); /* Clear the ram out, no junk to the user */ 131 adr = (unsigned long) mem; 132 while (size > 0) { 133 SetPageReserved(vmalloc_to_page((void *)adr)); 134 adr += PAGE_SIZE; 135 size -= PAGE_SIZE; 136 } 137 138 return mem; 139} 140 141static void usbvision_rvfree(void *mem, unsigned long size) 142{ 143 unsigned long adr; 144 145 if (!mem) 146 return; 147 148 size = PAGE_ALIGN(size); 149 150 adr = (unsigned long) mem; 151 while ((long) size > 0) { 152 ClearPageReserved(vmalloc_to_page((void *)adr)); 153 adr += PAGE_SIZE; 154 size -= PAGE_SIZE; 155 } 156 157 vfree(mem); 158} 159 160 161#if ENABLE_HEXDUMP 162static void usbvision_hexdump(const unsigned char *data, int len) 163{ 164 char tmp[80]; 165 int i, k; 166 167 for (i = k = 0; len > 0; i++, len--) { 168 if (i > 0 && (i % 16 == 0)) { 169 printk("%s\n", tmp); 170 k = 0; 171 } 172 k += sprintf(&tmp[k], "%02x ", data[i]); 173 } 174 if (k > 0) 175 printk(KERN_CONT "%s\n", tmp); 176} 177#endif 178 179/******************************** 180 * scratch ring buffer handling 181 ********************************/ 182static int scratch_len(struct usb_usbvision *usbvision) /* This returns the amount of data actually in the buffer */ 183{ 184 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr; 185 186 if (len < 0) 187 len += scratch_buf_size; 188 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len); 189 190 return len; 191} 192 193 194/* This returns the free space left in the buffer */ 195static int scratch_free(struct usb_usbvision *usbvision) 196{ 197 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr; 198 if (free <= 0) 199 free += scratch_buf_size; 200 if (free) { 201 free -= 1; /* at least one byte in the buffer must */ 202 /* left blank, otherwise there is no chance to differ between full and empty */ 203 } 204 PDEBUG(DBG_SCRATCH, "return %d\n", free); 205 206 return free; 207} 208 209 210/* This puts data into the buffer */ 211static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data, 212 int len) 213{ 214 int len_part; 215 216 if (usbvision->scratch_write_ptr + len < scratch_buf_size) { 217 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len); 218 usbvision->scratch_write_ptr += len; 219 } else { 220 len_part = scratch_buf_size - usbvision->scratch_write_ptr; 221 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part); 222 if (len == len_part) { 223 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */ 224 } else { 225 memcpy(usbvision->scratch, data + len_part, len - len_part); 226 usbvision->scratch_write_ptr = len - len_part; 227 } 228 } 229 230 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr); 231 232 return len; 233} 234 235/* This marks the write_ptr as position of new frame header */ 236static void scratch_mark_header(struct usb_usbvision *usbvision) 237{ 238 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr); 239 240 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] = 241 usbvision->scratch_write_ptr; 242 usbvision->scratch_headermarker_write_ptr += 1; 243 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER; 244} 245 246/* This gets data from the buffer at the given "ptr" position */ 247static int scratch_get_extra(struct usb_usbvision *usbvision, 248 unsigned char *data, int *ptr, int len) 249{ 250 int len_part; 251 252 if (*ptr + len < scratch_buf_size) { 253 memcpy(data, usbvision->scratch + *ptr, len); 254 *ptr += len; 255 } else { 256 len_part = scratch_buf_size - *ptr; 257 memcpy(data, usbvision->scratch + *ptr, len_part); 258 if (len == len_part) { 259 *ptr = 0; /* just set the y_ptr to zero */ 260 } else { 261 memcpy(data + len_part, usbvision->scratch, len - len_part); 262 *ptr = len - len_part; 263 } 264 } 265 266 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr); 267 268 return len; 269} 270 271 272/* This sets the scratch extra read pointer */ 273static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr, 274 int len) 275{ 276 *ptr = (usbvision->scratch_read_ptr + len) % scratch_buf_size; 277 278 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr); 279} 280 281 282/* This increments the scratch extra read pointer */ 283static void scratch_inc_extra_ptr(int *ptr, int len) 284{ 285 *ptr = (*ptr + len) % scratch_buf_size; 286 287 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr); 288} 289 290 291/* This gets data from the buffer */ 292static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data, 293 int len) 294{ 295 int len_part; 296 297 if (usbvision->scratch_read_ptr + len < scratch_buf_size) { 298 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len); 299 usbvision->scratch_read_ptr += len; 300 } else { 301 len_part = scratch_buf_size - usbvision->scratch_read_ptr; 302 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part); 303 if (len == len_part) { 304 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */ 305 } else { 306 memcpy(data + len_part, usbvision->scratch, len - len_part); 307 usbvision->scratch_read_ptr = len - len_part; 308 } 309 } 310 311 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr); 312 313 return len; 314} 315 316 317/* This sets read pointer to next header and returns it */ 318static int scratch_get_header(struct usb_usbvision *usbvision, 319 struct usbvision_frame_header *header) 320{ 321 int err_code = 0; 322 323 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr); 324 325 while (usbvision->scratch_headermarker_write_ptr - 326 usbvision->scratch_headermarker_read_ptr != 0) { 327 usbvision->scratch_read_ptr = 328 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr]; 329 usbvision->scratch_headermarker_read_ptr += 1; 330 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER; 331 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH); 332 if ((header->magic_1 == USBVISION_MAGIC_1) 333 && (header->magic_2 == USBVISION_MAGIC_2) 334 && (header->header_length == USBVISION_HEADER_LENGTH)) { 335 err_code = USBVISION_HEADER_LENGTH; 336 header->frame_width = header->frame_width_lo + (header->frame_width_hi << 8); 337 header->frame_height = header->frame_height_lo + (header->frame_height_hi << 8); 338 break; 339 } 340 } 341 342 return err_code; 343} 344 345 346/* This removes len bytes of old data from the buffer */ 347static void scratch_rm_old(struct usb_usbvision *usbvision, int len) 348{ 349 usbvision->scratch_read_ptr += len; 350 usbvision->scratch_read_ptr %= scratch_buf_size; 351 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr); 352} 353 354 355/* This resets the buffer - kills all data in it too */ 356static void scratch_reset(struct usb_usbvision *usbvision) 357{ 358 PDEBUG(DBG_SCRATCH, "\n"); 359 360 usbvision->scratch_read_ptr = 0; 361 usbvision->scratch_write_ptr = 0; 362 usbvision->scratch_headermarker_read_ptr = 0; 363 usbvision->scratch_headermarker_write_ptr = 0; 364 usbvision->isocstate = isoc_state_no_frame; 365} 366 367int usbvision_scratch_alloc(struct usb_usbvision *usbvision) 368{ 369 usbvision->scratch = vmalloc_32(scratch_buf_size); 370 scratch_reset(usbvision); 371 if (usbvision->scratch == NULL) { 372 dev_err(&usbvision->dev->dev, 373 "%s: unable to allocate %d bytes for scratch\n", 374 __func__, scratch_buf_size); 375 return -ENOMEM; 376 } 377 return 0; 378} 379 380void usbvision_scratch_free(struct usb_usbvision *usbvision) 381{ 382 vfree(usbvision->scratch); 383 usbvision->scratch = NULL; 384} 385 386/* 387 * usbvision_decompress_alloc() 388 * 389 * allocates intermediate buffer for decompression 390 */ 391int usbvision_decompress_alloc(struct usb_usbvision *usbvision) 392{ 393 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2; 394 395 usbvision->intra_frame_buffer = vmalloc_32(IFB_size); 396 if (usbvision->intra_frame_buffer == NULL) { 397 dev_err(&usbvision->dev->dev, 398 "%s: unable to allocate %d for compr. frame buffer\n", 399 __func__, IFB_size); 400 return -ENOMEM; 401 } 402 return 0; 403} 404 405/* 406 * usbvision_decompress_free() 407 * 408 * frees intermediate buffer for decompression 409 */ 410void usbvision_decompress_free(struct usb_usbvision *usbvision) 411{ 412 vfree(usbvision->intra_frame_buffer); 413 usbvision->intra_frame_buffer = NULL; 414 415} 416 417/************************************************************ 418 * Here comes the data parsing stuff that is run as interrupt 419 ************************************************************/ 420/* 421 * usbvision_find_header() 422 * 423 * Locate one of supported header markers in the scratch buffer. 424 */ 425static enum parse_state usbvision_find_header(struct usb_usbvision *usbvision) 426{ 427 struct usbvision_frame *frame; 428 int found_header = 0; 429 430 frame = usbvision->cur_frame; 431 432 while (scratch_get_header(usbvision, &frame->isoc_header) == USBVISION_HEADER_LENGTH) { 433 /* found header in scratch */ 434 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u", 435 frame->isoc_header.magic_2, 436 frame->isoc_header.magic_1, 437 frame->isoc_header.header_length, 438 frame->isoc_header.frame_num, 439 frame->isoc_header.frame_phase, 440 frame->isoc_header.frame_latency, 441 frame->isoc_header.data_format, 442 frame->isoc_header.format_param, 443 frame->isoc_header.frame_width, 444 frame->isoc_header.frame_height); 445 446 if (usbvision->request_intra) { 447 if (frame->isoc_header.format_param & 0x80) { 448 found_header = 1; 449 usbvision->last_isoc_frame_num = -1; /* do not check for lost frames this time */ 450 usbvision_unrequest_intra(usbvision); 451 break; 452 } 453 } else { 454 found_header = 1; 455 break; 456 } 457 } 458 459 if (found_header) { 460 frame->frmwidth = frame->isoc_header.frame_width * usbvision->stretch_width; 461 frame->frmheight = frame->isoc_header.frame_height * usbvision->stretch_height; 462 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth) >> 3; 463 } else { /* no header found */ 464 PDEBUG(DBG_HEADER, "skipping scratch data, no header"); 465 scratch_reset(usbvision); 466 return parse_state_end_parse; 467 } 468 469 /* found header */ 470 if (frame->isoc_header.data_format == ISOC_MODE_COMPRESS) { 471 /* check isoc_header.frame_num for lost frames */ 472 if (usbvision->last_isoc_frame_num >= 0) { 473 if (((usbvision->last_isoc_frame_num + 1) % 32) != frame->isoc_header.frame_num) { 474 /* unexpected frame drop: need to request new intra frame */ 475 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isoc_header.frame_num); 476 usbvision_request_intra(usbvision); 477 return parse_state_next_frame; 478 } 479 } 480 usbvision->last_isoc_frame_num = frame->isoc_header.frame_num; 481 } 482 usbvision->header_count++; 483 frame->scanstate = scan_state_lines; 484 frame->curline = 0; 485 486 return parse_state_continue; 487} 488 489static enum parse_state usbvision_parse_lines_422(struct usb_usbvision *usbvision, 490 long *pcopylen) 491{ 492 volatile struct usbvision_frame *frame; 493 unsigned char *f; 494 int len; 495 int i; 496 unsigned char yuyv[4] = { 180, 128, 10, 128 }; /* YUV components */ 497 unsigned char rv, gv, bv; /* RGB components */ 498 int clipmask_index, bytes_per_pixel; 499 int stretch_bytes, clipmask_add; 500 501 frame = usbvision->cur_frame; 502 f = frame->data + (frame->v4l2_linesize * frame->curline); 503 504 /* Make sure there's enough data for the entire line */ 505 len = (frame->isoc_header.frame_width * 2) + 5; 506 if (scratch_len(usbvision) < len) { 507 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len); 508 return parse_state_out; 509 } 510 511 if ((frame->curline + 1) >= frame->frmheight) 512 return parse_state_next_frame; 513 514 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; 515 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel; 516 clipmask_index = frame->curline * MAX_FRAME_WIDTH; 517 clipmask_add = usbvision->stretch_width; 518 519 for (i = 0; i < frame->frmwidth; i += (2 * usbvision->stretch_width)) { 520 scratch_get(usbvision, &yuyv[0], 4); 521 522 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 523 *f++ = yuyv[0]; /* Y */ 524 *f++ = yuyv[3]; /* U */ 525 } else { 526 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv); 527 switch (frame->v4l2_format.format) { 528 case V4L2_PIX_FMT_RGB565: 529 *f++ = (0x1F & rv) | 530 (0xE0 & (gv << 5)); 531 *f++ = (0x07 & (gv >> 3)) | 532 (0xF8 & bv); 533 break; 534 case V4L2_PIX_FMT_RGB24: 535 *f++ = rv; 536 *f++ = gv; 537 *f++ = bv; 538 break; 539 case V4L2_PIX_FMT_RGB32: 540 *f++ = rv; 541 *f++ = gv; 542 *f++ = bv; 543 f++; 544 break; 545 case V4L2_PIX_FMT_RGB555: 546 *f++ = (0x1F & rv) | 547 (0xE0 & (gv << 5)); 548 *f++ = (0x03 & (gv >> 3)) | 549 (0x7C & (bv << 2)); 550 break; 551 } 552 } 553 clipmask_index += clipmask_add; 554 f += stretch_bytes; 555 556 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 557 *f++ = yuyv[2]; /* Y */ 558 *f++ = yuyv[1]; /* V */ 559 } else { 560 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv); 561 switch (frame->v4l2_format.format) { 562 case V4L2_PIX_FMT_RGB565: 563 *f++ = (0x1F & rv) | 564 (0xE0 & (gv << 5)); 565 *f++ = (0x07 & (gv >> 3)) | 566 (0xF8 & bv); 567 break; 568 case V4L2_PIX_FMT_RGB24: 569 *f++ = rv; 570 *f++ = gv; 571 *f++ = bv; 572 break; 573 case V4L2_PIX_FMT_RGB32: 574 *f++ = rv; 575 *f++ = gv; 576 *f++ = bv; 577 f++; 578 break; 579 case V4L2_PIX_FMT_RGB555: 580 *f++ = (0x1F & rv) | 581 (0xE0 & (gv << 5)); 582 *f++ = (0x03 & (gv >> 3)) | 583 (0x7C & (bv << 2)); 584 break; 585 } 586 } 587 clipmask_index += clipmask_add; 588 f += stretch_bytes; 589 } 590 591 frame->curline += usbvision->stretch_height; 592 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height; 593 594 if (frame->curline >= frame->frmheight) 595 return parse_state_next_frame; 596 return parse_state_continue; 597} 598 599/* The decompression routine */ 600static int usbvision_decompress(struct usb_usbvision *usbvision, unsigned char *compressed, 601 unsigned char *decompressed, int *start_pos, 602 int *block_typestart_pos, int len) 603{ 604 int rest_pixel, idx, pos, extra_pos, block_len, block_type_pos, block_type_len; 605 unsigned char block_byte, block_code, block_type, block_type_byte, integrator; 606 607 integrator = 0; 608 pos = *start_pos; 609 block_type_pos = *block_typestart_pos; 610 extra_pos = pos; 611 block_len = 0; 612 block_byte = 0; 613 block_code = 0; 614 block_type = 0; 615 block_type_byte = 0; 616 block_type_len = 0; 617 rest_pixel = len; 618 619 for (idx = 0; idx < len; idx++) { 620 if (block_len == 0) { 621 if (block_type_len == 0) { 622 block_type_byte = compressed[block_type_pos]; 623 block_type_pos++; 624 block_type_len = 4; 625 } 626 block_type = (block_type_byte & 0xC0) >> 6; 627 628 /* statistic: */ 629 usbvision->compr_block_types[block_type]++; 630 631 pos = extra_pos; 632 if (block_type == 0) { 633 if (rest_pixel >= 24) { 634 idx += 23; 635 rest_pixel -= 24; 636 integrator = decompressed[idx]; 637 } else { 638 idx += rest_pixel - 1; 639 rest_pixel = 0; 640 } 641 } else { 642 block_code = compressed[pos]; 643 pos++; 644 if (rest_pixel >= 24) 645 block_len = 24; 646 else 647 block_len = rest_pixel; 648 rest_pixel -= block_len; 649 extra_pos = pos + (block_len / 4); 650 } 651 block_type_byte <<= 2; 652 block_type_len -= 1; 653 } 654 if (block_len > 0) { 655 if ((block_len % 4) == 0) { 656 block_byte = compressed[pos]; 657 pos++; 658 } 659 if (block_type == 1) /* inter Block */ 660 integrator = decompressed[idx]; 661 switch (block_byte & 0xC0) { 662 case 0x03 << 6: 663 integrator += compressed[extra_pos]; 664 extra_pos++; 665 break; 666 case 0x02 << 6: 667 integrator += block_code; 668 break; 669 case 0x00: 670 integrator -= block_code; 671 break; 672 } 673 decompressed[idx] = integrator; 674 block_byte <<= 2; 675 block_len -= 1; 676 } 677 } 678 *start_pos = extra_pos; 679 *block_typestart_pos = block_type_pos; 680 return idx; 681} 682 683 684/* 685 * usbvision_parse_compress() 686 * 687 * Parse compressed frame from the scratch buffer, put 688 * decoded RGB value into the current frame buffer and add the written 689 * number of bytes (RGB) to the *pcopylen. 690 * 691 */ 692static enum parse_state usbvision_parse_compress(struct usb_usbvision *usbvision, 693 long *pcopylen) 694{ 695#define USBVISION_STRIP_MAGIC 0x5A 696#define USBVISION_STRIP_LEN_MAX 400 697#define USBVISION_STRIP_HEADER_LEN 3 698 699 struct usbvision_frame *frame; 700 unsigned char *f, *u = NULL, *v = NULL; 701 unsigned char strip_data[USBVISION_STRIP_LEN_MAX]; 702 unsigned char strip_header[USBVISION_STRIP_HEADER_LEN]; 703 int idx, idx_end, strip_len, strip_ptr, startblock_pos, block_pos, block_type_pos; 704 int clipmask_index; 705 int image_size; 706 unsigned char rv, gv, bv; 707 static unsigned char *Y, *U, *V; 708 709 frame = usbvision->cur_frame; 710 image_size = frame->frmwidth * frame->frmheight; 711 if ((frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) || 712 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420)) { /* this is a planar format */ 713 /* ... v4l2_linesize not used here. */ 714 f = frame->data + (frame->width * frame->curline); 715 } else 716 f = frame->data + (frame->v4l2_linesize * frame->curline); 717 718 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { /* initialise u and v pointers */ 719 /* get base of u and b planes add halfoffset */ 720 u = frame->data 721 + image_size 722 + (frame->frmwidth >> 1) * frame->curline; 723 v = u + (image_size >> 1); 724 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) { 725 v = frame->data + image_size + ((frame->curline * (frame->width)) >> 2); 726 u = v + (image_size >> 2); 727 } 728 729 if (frame->curline == 0) 730 usbvision_adjust_compression(usbvision); 731 732 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) 733 return parse_state_out; 734 735 /* get strip header without changing the scratch_read_ptr */ 736 scratch_set_extra_ptr(usbvision, &strip_ptr, 0); 737 scratch_get_extra(usbvision, &strip_header[0], &strip_ptr, 738 USBVISION_STRIP_HEADER_LEN); 739 740 if (strip_header[0] != USBVISION_STRIP_MAGIC) { 741 /* wrong strip magic */ 742 usbvision->strip_magic_errors++; 743 return parse_state_next_frame; 744 } 745 746 if (frame->curline != (int)strip_header[2]) { 747 /* line number mismatch error */ 748 usbvision->strip_line_number_errors++; 749 } 750 751 strip_len = 2 * (unsigned int)strip_header[1]; 752 if (strip_len > USBVISION_STRIP_LEN_MAX) { 753 /* strip overrun */ 754 /* I think this never happens */ 755 usbvision_request_intra(usbvision); 756 } 757 758 if (scratch_len(usbvision) < strip_len) { 759 /* there is not enough data for the strip */ 760 return parse_state_out; 761 } 762 763 if (usbvision->intra_frame_buffer) { 764 Y = usbvision->intra_frame_buffer + frame->frmwidth * frame->curline; 765 U = usbvision->intra_frame_buffer + image_size + (frame->frmwidth / 2) * (frame->curline / 2); 766 V = usbvision->intra_frame_buffer + image_size / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2); 767 } else { 768 return parse_state_next_frame; 769 } 770 771 clipmask_index = frame->curline * MAX_FRAME_WIDTH; 772 773 scratch_get(usbvision, strip_data, strip_len); 774 775 idx_end = frame->frmwidth; 776 block_type_pos = USBVISION_STRIP_HEADER_LEN; 777 startblock_pos = block_type_pos + (idx_end - 1) / 96 + (idx_end / 2 - 1) / 96 + 2; 778 block_pos = startblock_pos; 779 780 usbvision->block_pos = block_pos; 781 782 usbvision_decompress(usbvision, strip_data, Y, &block_pos, &block_type_pos, idx_end); 783 if (strip_len > usbvision->max_strip_len) 784 usbvision->max_strip_len = strip_len; 785 786 if (frame->curline % 2) 787 usbvision_decompress(usbvision, strip_data, V, &block_pos, &block_type_pos, idx_end / 2); 788 else 789 usbvision_decompress(usbvision, strip_data, U, &block_pos, &block_type_pos, idx_end / 2); 790 791 if (block_pos > usbvision->comprblock_pos) 792 usbvision->comprblock_pos = block_pos; 793 if (block_pos > strip_len) 794 usbvision->strip_len_errors++; 795 796 for (idx = 0; idx < idx_end; idx++) { 797 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 798 *f++ = Y[idx]; 799 *f++ = idx & 0x01 ? U[idx / 2] : V[idx / 2]; 800 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) { 801 *f++ = Y[idx]; 802 if (idx & 0x01) 803 *u++ = U[idx >> 1]; 804 else 805 *v++ = V[idx >> 1]; 806 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) { 807 *f++ = Y[idx]; 808 if (!((idx & 0x01) | (frame->curline & 0x01))) { 809 /* only need do this for 1 in 4 pixels */ 810 /* intraframe buffer is YUV420 format */ 811 *u++ = U[idx >> 1]; 812 *v++ = V[idx >> 1]; 813 } 814 } else { 815 YUV_TO_RGB_BY_THE_BOOK(Y[idx], U[idx / 2], V[idx / 2], rv, gv, bv); 816 switch (frame->v4l2_format.format) { 817 case V4L2_PIX_FMT_GREY: 818 *f++ = Y[idx]; 819 break; 820 case V4L2_PIX_FMT_RGB555: 821 *f++ = (0x1F & rv) | 822 (0xE0 & (gv << 5)); 823 *f++ = (0x03 & (gv >> 3)) | 824 (0x7C & (bv << 2)); 825 break; 826 case V4L2_PIX_FMT_RGB565: 827 *f++ = (0x1F & rv) | 828 (0xE0 & (gv << 5)); 829 *f++ = (0x07 & (gv >> 3)) | 830 (0xF8 & bv); 831 break; 832 case V4L2_PIX_FMT_RGB24: 833 *f++ = rv; 834 *f++ = gv; 835 *f++ = bv; 836 break; 837 case V4L2_PIX_FMT_RGB32: 838 *f++ = rv; 839 *f++ = gv; 840 *f++ = bv; 841 f++; 842 break; 843 } 844 } 845 clipmask_index++; 846 } 847 /* Deal with non-integer no. of bytes for YUV420P */ 848 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420) 849 *pcopylen += frame->v4l2_linesize; 850 else 851 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1; 852 853 frame->curline += 1; 854 855 if (frame->curline >= frame->frmheight) 856 return parse_state_next_frame; 857 return parse_state_continue; 858 859} 860 861 862/* 863 * usbvision_parse_lines_420() 864 * 865 * Parse two lines from the scratch buffer, put 866 * decoded RGB value into the current frame buffer and add the written 867 * number of bytes (RGB) to the *pcopylen. 868 * 869 */ 870static enum parse_state usbvision_parse_lines_420(struct usb_usbvision *usbvision, 871 long *pcopylen) 872{ 873 struct usbvision_frame *frame; 874 unsigned char *f_even = NULL, *f_odd = NULL; 875 unsigned int pixel_per_line, block; 876 int pixel, block_split; 877 int y_ptr, u_ptr, v_ptr, y_odd_offset; 878 const int y_block_size = 128; 879 const int uv_block_size = 64; 880 const int sub_block_size = 32; 881 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4; 882 const int uv_step[] = { 0, 0, 0, 4 }, uv_step_size = 4; 883 unsigned char y[2], u, v; /* YUV components */ 884 int y_, u_, v_, vb, uvg, ur; 885 int r_, g_, b_; /* RGB components */ 886 unsigned char g; 887 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel; 888 int clipmask_add, stretch_bytes; 889 890 frame = usbvision->cur_frame; 891 f_even = frame->data + (frame->v4l2_linesize * frame->curline); 892 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height; 893 894 /* Make sure there's enough data for the entire line */ 895 /* In this mode usbvision transfer 3 bytes for every 2 pixels */ 896 /* I need two lines to decode the color */ 897 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; 898 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel; 899 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH; 900 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH; 901 clipmask_add = usbvision->stretch_width; 902 pixel_per_line = frame->isoc_header.frame_width; 903 904 if (scratch_len(usbvision) < (int)pixel_per_line * 3) { 905 /* printk(KERN_DEBUG "out of data, need %d\n", len); */ 906 return parse_state_out; 907 } 908 909 if ((frame->curline + 1) >= frame->frmheight) 910 return parse_state_next_frame; 911 912 block_split = (pixel_per_line%y_block_size) ? 1 : 0; /* are some blocks splitted into different lines? */ 913 914 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size) 915 + block_split * uv_block_size; 916 917 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset); 918 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size); 919 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset 920 + (4 - block_split) * sub_block_size); 921 922 for (block = 0; block < (pixel_per_line / sub_block_size); block++) { 923 for (pixel = 0; pixel < sub_block_size; pixel += 2) { 924 scratch_get(usbvision, &y[0], 2); 925 scratch_get_extra(usbvision, &u, &u_ptr, 1); 926 scratch_get_extra(usbvision, &v, &v_ptr, 1); 927 928 /* I don't use the YUV_TO_RGB macro for better performance */ 929 v_ = v - 128; 930 u_ = u - 128; 931 vb = 132252 * v_; 932 uvg = -53281 * u_ - 25625 * v_; 933 ur = 104595 * u_; 934 935 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 936 *f_even++ = y[0]; 937 *f_even++ = v; 938 } else { 939 y_ = 76284 * (y[0] - 16); 940 941 b_ = (y_ + vb) >> 16; 942 g_ = (y_ + uvg) >> 16; 943 r_ = (y_ + ur) >> 16; 944 945 switch (frame->v4l2_format.format) { 946 case V4L2_PIX_FMT_RGB565: 947 g = LIMIT_RGB(g_); 948 *f_even++ = 949 (0x1F & LIMIT_RGB(r_)) | 950 (0xE0 & (g << 5)); 951 *f_even++ = 952 (0x07 & (g >> 3)) | 953 (0xF8 & LIMIT_RGB(b_)); 954 break; 955 case V4L2_PIX_FMT_RGB24: 956 *f_even++ = LIMIT_RGB(r_); 957 *f_even++ = LIMIT_RGB(g_); 958 *f_even++ = LIMIT_RGB(b_); 959 break; 960 case V4L2_PIX_FMT_RGB32: 961 *f_even++ = LIMIT_RGB(r_); 962 *f_even++ = LIMIT_RGB(g_); 963 *f_even++ = LIMIT_RGB(b_); 964 f_even++; 965 break; 966 case V4L2_PIX_FMT_RGB555: 967 g = LIMIT_RGB(g_); 968 *f_even++ = (0x1F & LIMIT_RGB(r_)) | 969 (0xE0 & (g << 5)); 970 *f_even++ = (0x03 & (g >> 3)) | 971 (0x7C & (LIMIT_RGB(b_) << 2)); 972 break; 973 } 974 } 975 clipmask_even_index += clipmask_add; 976 f_even += stretch_bytes; 977 978 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 979 *f_even++ = y[1]; 980 *f_even++ = u; 981 } else { 982 y_ = 76284 * (y[1] - 16); 983 984 b_ = (y_ + vb) >> 16; 985 g_ = (y_ + uvg) >> 16; 986 r_ = (y_ + ur) >> 16; 987 988 switch (frame->v4l2_format.format) { 989 case V4L2_PIX_FMT_RGB565: 990 g = LIMIT_RGB(g_); 991 *f_even++ = 992 (0x1F & LIMIT_RGB(r_)) | 993 (0xE0 & (g << 5)); 994 *f_even++ = 995 (0x07 & (g >> 3)) | 996 (0xF8 & LIMIT_RGB(b_)); 997 break; 998 case V4L2_PIX_FMT_RGB24: 999 *f_even++ = LIMIT_RGB(r_); 1000 *f_even++ = LIMIT_RGB(g_); 1001 *f_even++ = LIMIT_RGB(b_); 1002 break; 1003 case V4L2_PIX_FMT_RGB32: 1004 *f_even++ = LIMIT_RGB(r_); 1005 *f_even++ = LIMIT_RGB(g_); 1006 *f_even++ = LIMIT_RGB(b_); 1007 f_even++; 1008 break; 1009 case V4L2_PIX_FMT_RGB555: 1010 g = LIMIT_RGB(g_); 1011 *f_even++ = (0x1F & LIMIT_RGB(r_)) | 1012 (0xE0 & (g << 5)); 1013 *f_even++ = (0x03 & (g >> 3)) | 1014 (0x7C & (LIMIT_RGB(b_) << 2)); 1015 break; 1016 } 1017 } 1018 clipmask_even_index += clipmask_add; 1019 f_even += stretch_bytes; 1020 1021 scratch_get_extra(usbvision, &y[0], &y_ptr, 2); 1022 1023 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 1024 *f_odd++ = y[0]; 1025 *f_odd++ = v; 1026 } else { 1027 y_ = 76284 * (y[0] - 16); 1028 1029 b_ = (y_ + vb) >> 16; 1030 g_ = (y_ + uvg) >> 16; 1031 r_ = (y_ + ur) >> 16; 1032 1033 switch (frame->v4l2_format.format) { 1034 case V4L2_PIX_FMT_RGB565: 1035 g = LIMIT_RGB(g_); 1036 *f_odd++ = 1037 (0x1F & LIMIT_RGB(r_)) | 1038 (0xE0 & (g << 5)); 1039 *f_odd++ = 1040 (0x07 & (g >> 3)) | 1041 (0xF8 & LIMIT_RGB(b_)); 1042 break; 1043 case V4L2_PIX_FMT_RGB24: 1044 *f_odd++ = LIMIT_RGB(r_); 1045 *f_odd++ = LIMIT_RGB(g_); 1046 *f_odd++ = LIMIT_RGB(b_); 1047 break; 1048 case V4L2_PIX_FMT_RGB32: 1049 *f_odd++ = LIMIT_RGB(r_); 1050 *f_odd++ = LIMIT_RGB(g_); 1051 *f_odd++ = LIMIT_RGB(b_); 1052 f_odd++; 1053 break; 1054 case V4L2_PIX_FMT_RGB555: 1055 g = LIMIT_RGB(g_); 1056 *f_odd++ = (0x1F & LIMIT_RGB(r_)) | 1057 (0xE0 & (g << 5)); 1058 *f_odd++ = (0x03 & (g >> 3)) | 1059 (0x7C & (LIMIT_RGB(b_) << 2)); 1060 break; 1061 } 1062 } 1063 clipmask_odd_index += clipmask_add; 1064 f_odd += stretch_bytes; 1065 1066 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { 1067 *f_odd++ = y[1]; 1068 *f_odd++ = u; 1069 } else { 1070 y_ = 76284 * (y[1] - 16); 1071 1072 b_ = (y_ + vb) >> 16; 1073 g_ = (y_ + uvg) >> 16; 1074 r_ = (y_ + ur) >> 16; 1075 1076 switch (frame->v4l2_format.format) { 1077 case V4L2_PIX_FMT_RGB565: 1078 g = LIMIT_RGB(g_); 1079 *f_odd++ = 1080 (0x1F & LIMIT_RGB(r_)) | 1081 (0xE0 & (g << 5)); 1082 *f_odd++ = 1083 (0x07 & (g >> 3)) | 1084 (0xF8 & LIMIT_RGB(b_)); 1085 break; 1086 case V4L2_PIX_FMT_RGB24: 1087 *f_odd++ = LIMIT_RGB(r_); 1088 *f_odd++ = LIMIT_RGB(g_); 1089 *f_odd++ = LIMIT_RGB(b_); 1090 break; 1091 case V4L2_PIX_FMT_RGB32: 1092 *f_odd++ = LIMIT_RGB(r_); 1093 *f_odd++ = LIMIT_RGB(g_); 1094 *f_odd++ = LIMIT_RGB(b_); 1095 f_odd++; 1096 break; 1097 case V4L2_PIX_FMT_RGB555: 1098 g = LIMIT_RGB(g_); 1099 *f_odd++ = (0x1F & LIMIT_RGB(r_)) | 1100 (0xE0 & (g << 5)); 1101 *f_odd++ = (0x03 & (g >> 3)) | 1102 (0x7C & (LIMIT_RGB(b_) << 2)); 1103 break; 1104 } 1105 } 1106 clipmask_odd_index += clipmask_add; 1107 f_odd += stretch_bytes; 1108 } 1109 1110 scratch_rm_old(usbvision, y_step[block % y_step_size] * sub_block_size); 1111 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size] 1112 * sub_block_size); 1113 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size] 1114 * sub_block_size); 1115 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size] 1116 * sub_block_size); 1117 } 1118 1119 scratch_rm_old(usbvision, pixel_per_line * 3 / 2 1120 + block_split * sub_block_size); 1121 1122 frame->curline += 2 * usbvision->stretch_height; 1123 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height; 1124 1125 if (frame->curline >= frame->frmheight) 1126 return parse_state_next_frame; 1127 return parse_state_continue; 1128} 1129 1130/* 1131 * usbvision_parse_data() 1132 * 1133 * Generic routine to parse the scratch buffer. It employs either 1134 * usbvision_find_header() or usbvision_parse_lines() to do most 1135 * of work. 1136 * 1137 */ 1138static void usbvision_parse_data(struct usb_usbvision *usbvision) 1139{ 1140 struct usbvision_frame *frame; 1141 enum parse_state newstate; 1142 long copylen = 0; 1143 unsigned long lock_flags; 1144 1145 frame = usbvision->cur_frame; 1146 1147 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision)); 1148 1149 while (1) { 1150 newstate = parse_state_out; 1151 if (scratch_len(usbvision)) { 1152 if (frame->scanstate == scan_state_scanning) { 1153 newstate = usbvision_find_header(usbvision); 1154 } else if (frame->scanstate == scan_state_lines) { 1155 if (usbvision->isoc_mode == ISOC_MODE_YUV420) 1156 newstate = usbvision_parse_lines_420(usbvision, ©len); 1157 else if (usbvision->isoc_mode == ISOC_MODE_YUV422) 1158 newstate = usbvision_parse_lines_422(usbvision, ©len); 1159 else if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) 1160 newstate = usbvision_parse_compress(usbvision, ©len); 1161 } 1162 } 1163 if (newstate == parse_state_continue) 1164 continue; 1165 if ((newstate == parse_state_next_frame) || (newstate == parse_state_out)) 1166 break; 1167 return; /* parse_state_end_parse */ 1168 } 1169 1170 if (newstate == parse_state_next_frame) { 1171 frame->grabstate = frame_state_done; 1172 v4l2_get_timestamp(&(frame->timestamp)); 1173 frame->sequence = usbvision->frame_num; 1174 1175 spin_lock_irqsave(&usbvision->queue_lock, lock_flags); 1176 list_move_tail(&(frame->frame), &usbvision->outqueue); 1177 usbvision->cur_frame = NULL; 1178 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags); 1179 1180 usbvision->frame_num++; 1181 1182 /* This will cause the process to request another frame. */ 1183 if (waitqueue_active(&usbvision->wait_frame)) { 1184 PDEBUG(DBG_PARSE, "Wake up !"); 1185 wake_up_interruptible(&usbvision->wait_frame); 1186 } 1187 } else { 1188 frame->grabstate = frame_state_grabbing; 1189 } 1190 1191 /* Update the frame's uncompressed length. */ 1192 frame->scanlength += copylen; 1193} 1194 1195 1196/* 1197 * Make all of the blocks of data contiguous 1198 */ 1199static int usbvision_compress_isochronous(struct usb_usbvision *usbvision, 1200 struct urb *urb) 1201{ 1202 unsigned char *packet_data; 1203 int i, totlen = 0; 1204 1205 for (i = 0; i < urb->number_of_packets; i++) { 1206 int packet_len = urb->iso_frame_desc[i].actual_length; 1207 int packet_stat = urb->iso_frame_desc[i].status; 1208 1209 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset; 1210 1211 /* Detect and ignore errored packets */ 1212 if (packet_stat) { /* packet_stat != 0 ????????????? */ 1213 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat); 1214 usbvision->isoc_err_count++; 1215 continue; 1216 } 1217 1218 /* Detect and ignore empty packets */ 1219 if (packet_len < 0) { 1220 PDEBUG(DBG_ISOC, "error packet [%d]", i); 1221 usbvision->isoc_skip_count++; 1222 continue; 1223 } else if (packet_len == 0) { /* Frame end ????? */ 1224 PDEBUG(DBG_ISOC, "null packet [%d]", i); 1225 usbvision->isocstate = isoc_state_no_frame; 1226 usbvision->isoc_skip_count++; 1227 continue; 1228 } else if (packet_len > usbvision->isoc_packet_size) { 1229 PDEBUG(DBG_ISOC, "packet[%d] > isoc_packet_size", i); 1230 usbvision->isoc_skip_count++; 1231 continue; 1232 } 1233 1234 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len); 1235 1236 if (usbvision->isocstate == isoc_state_no_frame) { /* new frame begins */ 1237 usbvision->isocstate = isoc_state_in_frame; 1238 scratch_mark_header(usbvision); 1239 usbvision_measure_bandwidth(usbvision); 1240 PDEBUG(DBG_ISOC, "packet with header"); 1241 } 1242 1243 /* 1244 * If usbvision continues to feed us with data but there is no 1245 * consumption (if, for example, V4L client fell asleep) we 1246 * may overflow the buffer. We have to move old data over to 1247 * free room for new data. This is bad for old data. If we 1248 * just drop new data then it's bad for new data... choose 1249 * your favorite evil here. 1250 */ 1251 if (scratch_free(usbvision) < packet_len) { 1252 usbvision->scratch_ovf_count++; 1253 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d", 1254 scratch_len(usbvision), packet_len); 1255 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision)); 1256 } 1257 1258 /* Now we know that there is enough room in scratch buffer */ 1259 scratch_put(usbvision, packet_data, packet_len); 1260 totlen += packet_len; 1261 usbvision->isoc_data_count += packet_len; 1262 usbvision->isoc_packet_count++; 1263 } 1264#if ENABLE_HEXDUMP 1265 if (totlen > 0) { 1266 static int foo; 1267 1268 if (foo < 1) { 1269 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen); 1270 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen); 1271 ++foo; 1272 } 1273 } 1274#endif 1275 return totlen; 1276} 1277 1278static void usbvision_isoc_irq(struct urb *urb) 1279{ 1280 int err_code = 0; 1281 int len; 1282 struct usb_usbvision *usbvision = urb->context; 1283 int i; 1284 unsigned long start_time = jiffies; 1285 struct usbvision_frame **f; 1286 1287 /* We don't want to do anything if we are about to be removed! */ 1288 if (!USBVISION_IS_OPERATIONAL(usbvision)) 1289 return; 1290 1291 /* any urb with wrong status is ignored without acknowledgement */ 1292 if (urb->status == -ENOENT) 1293 return; 1294 1295 f = &usbvision->cur_frame; 1296 1297 /* Manage streaming interruption */ 1298 if (usbvision->streaming == stream_interrupt) { 1299 usbvision->streaming = stream_idle; 1300 if ((*f)) { 1301 (*f)->grabstate = frame_state_ready; 1302 (*f)->scanstate = scan_state_scanning; 1303 } 1304 PDEBUG(DBG_IRQ, "stream interrupted"); 1305 wake_up_interruptible(&usbvision->wait_stream); 1306 } 1307 1308 /* Copy the data received into our scratch buffer */ 1309 len = usbvision_compress_isochronous(usbvision, urb); 1310 1311 usbvision->isoc_urb_count++; 1312 usbvision->urb_length = len; 1313 1314 if (usbvision->streaming == stream_on) { 1315 /* If we collected enough data let's parse! */ 1316 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH && 1317 !list_empty(&(usbvision->inqueue))) { 1318 if (!(*f)) { 1319 (*f) = list_entry(usbvision->inqueue.next, 1320 struct usbvision_frame, 1321 frame); 1322 } 1323 usbvision_parse_data(usbvision); 1324 } else { 1325 /* If we don't have a frame 1326 we're current working on, complain */ 1327 PDEBUG(DBG_IRQ, 1328 "received data, but no one needs it"); 1329 scratch_reset(usbvision); 1330 } 1331 } else { 1332 PDEBUG(DBG_IRQ, "received data, but no one needs it"); 1333 scratch_reset(usbvision); 1334 } 1335 1336 usbvision->time_in_irq += jiffies - start_time; 1337 1338 for (i = 0; i < USBVISION_URB_FRAMES; i++) { 1339 urb->iso_frame_desc[i].status = 0; 1340 urb->iso_frame_desc[i].actual_length = 0; 1341 } 1342 1343 urb->status = 0; 1344 urb->dev = usbvision->dev; 1345 err_code = usb_submit_urb(urb, GFP_ATOMIC); 1346 1347 if (err_code) { 1348 dev_err(&usbvision->dev->dev, 1349 "%s: usb_submit_urb failed: error %d\n", 1350 __func__, err_code); 1351 } 1352 1353 return; 1354} 1355 1356/*************************************/ 1357/* Low level usbvision access functions */ 1358/*************************************/ 1359 1360/* 1361 * usbvision_read_reg() 1362 * 1363 * return < 0 -> Error 1364 * >= 0 -> Data 1365 */ 1366 1367int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg) 1368{ 1369 int err_code = 0; 1370 unsigned char buffer[1]; 1371 1372 if (!USBVISION_IS_OPERATIONAL(usbvision)) 1373 return -1; 1374 1375 err_code = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1), 1376 USBVISION_OP_CODE, 1377 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 1378 0, (__u16) reg, buffer, 1, HZ); 1379 1380 if (err_code < 0) { 1381 dev_err(&usbvision->dev->dev, 1382 "%s: failed: error %d\n", __func__, err_code); 1383 return err_code; 1384 } 1385 return buffer[0]; 1386} 1387 1388/* 1389 * usbvision_write_reg() 1390 * 1391 * return 1 -> Reg written 1392 * 0 -> usbvision is not yet ready 1393 * -1 -> Something went wrong 1394 */ 1395 1396int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg, 1397 unsigned char value) 1398{ 1399 int err_code = 0; 1400 1401 if (!USBVISION_IS_OPERATIONAL(usbvision)) 1402 return 0; 1403 1404 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 1405 USBVISION_OP_CODE, 1406 USB_DIR_OUT | USB_TYPE_VENDOR | 1407 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ); 1408 1409 if (err_code < 0) { 1410 dev_err(&usbvision->dev->dev, 1411 "%s: failed: error %d\n", __func__, err_code); 1412 } 1413 return err_code; 1414} 1415 1416 1417static void usbvision_ctrl_urb_complete(struct urb *urb) 1418{ 1419 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context; 1420 1421 PDEBUG(DBG_IRQ, ""); 1422 usbvision->ctrl_urb_busy = 0; 1423 if (waitqueue_active(&usbvision->ctrl_urb_wq)) 1424 wake_up_interruptible(&usbvision->ctrl_urb_wq); 1425} 1426 1427 1428static int usbvision_write_reg_irq(struct usb_usbvision *usbvision, int address, 1429 unsigned char *data, int len) 1430{ 1431 int err_code = 0; 1432 1433 PDEBUG(DBG_IRQ, ""); 1434 if (len > 8) 1435 return -EFAULT; 1436 if (usbvision->ctrl_urb_busy) 1437 return -EBUSY; 1438 usbvision->ctrl_urb_busy = 1; 1439 1440 usbvision->ctrl_urb_setup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT; 1441 usbvision->ctrl_urb_setup.bRequest = USBVISION_OP_CODE; 1442 usbvision->ctrl_urb_setup.wValue = 0; 1443 usbvision->ctrl_urb_setup.wIndex = cpu_to_le16(address); 1444 usbvision->ctrl_urb_setup.wLength = cpu_to_le16(len); 1445 usb_fill_control_urb(usbvision->ctrl_urb, usbvision->dev, 1446 usb_sndctrlpipe(usbvision->dev, 1), 1447 (unsigned char *)&usbvision->ctrl_urb_setup, 1448 (void *)usbvision->ctrl_urb_buffer, len, 1449 usbvision_ctrl_urb_complete, 1450 (void *)usbvision); 1451 1452 memcpy(usbvision->ctrl_urb_buffer, data, len); 1453 1454 err_code = usb_submit_urb(usbvision->ctrl_urb, GFP_ATOMIC); 1455 if (err_code < 0) { 1456 /* error in usb_submit_urb() */ 1457 usbvision->ctrl_urb_busy = 0; 1458 } 1459 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, err_code); 1460 return err_code; 1461} 1462 1463 1464static int usbvision_init_compression(struct usb_usbvision *usbvision) 1465{ 1466 usbvision->last_isoc_frame_num = -1; 1467 usbvision->isoc_data_count = 0; 1468 usbvision->isoc_packet_count = 0; 1469 usbvision->isoc_skip_count = 0; 1470 usbvision->compr_level = 50; 1471 usbvision->last_compr_level = -1; 1472 usbvision->isoc_urb_count = 0; 1473 usbvision->request_intra = 1; 1474 usbvision->isoc_measure_bandwidth_count = 0; 1475 1476 return 0; 1477} 1478 1479/* this function measures the used bandwidth since last call 1480 * return: 0 : no error 1481 * sets used_bandwidth to 1-100 : 1-100% of full bandwidth resp. to isoc_packet_size 1482 */ 1483static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision) 1484{ 1485 if (usbvision->isoc_measure_bandwidth_count < 2) { /* this gives an average bandwidth of 3 frames */ 1486 usbvision->isoc_measure_bandwidth_count++; 1487 return 0; 1488 } 1489 if ((usbvision->isoc_packet_size > 0) && (usbvision->isoc_packet_count > 0)) { 1490 usbvision->used_bandwidth = usbvision->isoc_data_count / 1491 (usbvision->isoc_packet_count + usbvision->isoc_skip_count) * 1492 100 / usbvision->isoc_packet_size; 1493 } 1494 usbvision->isoc_measure_bandwidth_count = 0; 1495 usbvision->isoc_data_count = 0; 1496 usbvision->isoc_packet_count = 0; 1497 usbvision->isoc_skip_count = 0; 1498 return 0; 1499} 1500 1501static int usbvision_adjust_compression(struct usb_usbvision *usbvision) 1502{ 1503 int err_code = 0; 1504 unsigned char buffer[6]; 1505 1506 PDEBUG(DBG_IRQ, ""); 1507 if ((adjust_compression) && (usbvision->used_bandwidth > 0)) { 1508 usbvision->compr_level += (usbvision->used_bandwidth - 90) / 2; 1509 RESTRICT_TO_RANGE(usbvision->compr_level, 0, 100); 1510 if (usbvision->compr_level != usbvision->last_compr_level) { 1511 int distortion; 1512 1513 if (usbvision->bridge_type == BRIDGE_NT1004 || usbvision->bridge_type == BRIDGE_NT1005) { 1514 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM Threshold 1 */ 1515 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM Threshold 2 */ 1516 distortion = 7 + 248 * usbvision->compr_level / 100; 1517 buffer[2] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (inter) */ 1518 buffer[3] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (intra) */ 1519 distortion = 1 + 42 * usbvision->compr_level / 100; 1520 buffer[4] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (inter) */ 1521 buffer[5] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (intra) */ 1522 } else { /* BRIDGE_NT1003 */ 1523 buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM threshold 1 */ 1524 buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM threshold 2 */ 1525 distortion = 2 + 253 * usbvision->compr_level / 100; 1526 buffer[2] = (unsigned char)(distortion & 0xFF); /* distortion threshold bit0-7 */ 1527 buffer[3] = 0; /* (unsigned char)((distortion >> 8) & 0x0F); distortion threshold bit 8-11 */ 1528 distortion = 0 + 43 * usbvision->compr_level / 100; 1529 buffer[4] = (unsigned char)(distortion & 0xFF); /* maximum distortion bit0-7 */ 1530 buffer[5] = 0; /* (unsigned char)((distortion >> 8) & 0x01); maximum distortion bit 8 */ 1531 } 1532 err_code = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6); 1533 if (err_code == 0) { 1534 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0], 1535 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]); 1536 usbvision->last_compr_level = usbvision->compr_level; 1537 } 1538 } 1539 } 1540 return err_code; 1541} 1542 1543static int usbvision_request_intra(struct usb_usbvision *usbvision) 1544{ 1545 unsigned char buffer[1]; 1546 1547 PDEBUG(DBG_IRQ, ""); 1548 usbvision->request_intra = 1; 1549 buffer[0] = 1; 1550 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1); 1551 return 0; 1552} 1553 1554static int usbvision_unrequest_intra(struct usb_usbvision *usbvision) 1555{ 1556 unsigned char buffer[1]; 1557 1558 PDEBUG(DBG_IRQ, ""); 1559 usbvision->request_intra = 0; 1560 buffer[0] = 0; 1561 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1); 1562 return 0; 1563} 1564 1565/******************************* 1566 * usbvision utility functions 1567 *******************************/ 1568 1569int usbvision_power_off(struct usb_usbvision *usbvision) 1570{ 1571 int err_code = 0; 1572 1573 PDEBUG(DBG_FUNC, ""); 1574 1575 err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN); 1576 if (err_code == 1) 1577 usbvision->power = 0; 1578 PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code != 1) ? "ERROR" : "power is off", err_code); 1579 return err_code; 1580} 1581 1582/* configure webcam image sensor using the serial port */ 1583static int usbvision_init_webcam(struct usb_usbvision *usbvision) 1584{ 1585 int rc; 1586 int i; 1587 static char init_values[38][3] = { 1588 { 0x04, 0x12, 0x08 }, { 0x05, 0xff, 0xc8 }, { 0x06, 0x18, 0x07 }, { 0x07, 0x90, 0x00 }, 1589 { 0x09, 0x00, 0x00 }, { 0x0a, 0x00, 0x00 }, { 0x0b, 0x08, 0x00 }, { 0x0d, 0xcc, 0xcc }, 1590 { 0x0e, 0x13, 0x14 }, { 0x10, 0x9b, 0x83 }, { 0x11, 0x5a, 0x3f }, { 0x12, 0xe4, 0x73 }, 1591 { 0x13, 0x88, 0x84 }, { 0x14, 0x89, 0x80 }, { 0x15, 0x00, 0x20 }, { 0x16, 0x00, 0x00 }, 1592 { 0x17, 0xff, 0xa0 }, { 0x18, 0x6b, 0x20 }, { 0x19, 0x22, 0x40 }, { 0x1a, 0x10, 0x07 }, 1593 { 0x1b, 0x00, 0x47 }, { 0x1c, 0x03, 0xe0 }, { 0x1d, 0x00, 0x00 }, { 0x1e, 0x00, 0x00 }, 1594 { 0x1f, 0x00, 0x00 }, { 0x20, 0x00, 0x00 }, { 0x21, 0x00, 0x00 }, { 0x22, 0x00, 0x00 }, 1595 { 0x23, 0x00, 0x00 }, { 0x24, 0x00, 0x00 }, { 0x25, 0x00, 0x00 }, { 0x26, 0x00, 0x00 }, 1596 { 0x27, 0x00, 0x00 }, { 0x28, 0x00, 0x00 }, { 0x29, 0x00, 0x00 }, { 0x08, 0x80, 0x60 }, 1597 { 0x0f, 0x2d, 0x24 }, { 0x0c, 0x80, 0x80 } 1598 }; 1599 char value[3]; 1600 1601 /* the only difference between PAL and NTSC init_values */ 1602 if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_NTSC) 1603 init_values[4][1] = 0x34; 1604 1605 for (i = 0; i < sizeof(init_values) / 3; i++) { 1606 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT); 1607 memcpy(value, init_values[i], 3); 1608 rc = usb_control_msg(usbvision->dev, 1609 usb_sndctrlpipe(usbvision->dev, 1), 1610 USBVISION_OP_CODE, 1611 USB_DIR_OUT | USB_TYPE_VENDOR | 1612 USB_RECIP_ENDPOINT, 0, 1613 (__u16) USBVISION_SER_DAT1, value, 1614 3, HZ); 1615 if (rc < 0) 1616 return rc; 1617 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SIO); 1618 /* write 3 bytes to the serial port using SIO mode */ 1619 usbvision_write_reg(usbvision, USBVISION_SER_CONT, 3 | 0x10); 1620 usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, 0); 1621 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT); 1622 usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_IO_2); 1623 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT); 1624 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_DAT_IO); 1625 usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT | USBVISION_DAT_IO); 1626 } 1627 1628 return 0; 1629} 1630 1631/* 1632 * usbvision_set_video_format() 1633 * 1634 */ 1635static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format) 1636{ 1637 static const char proc[] = "usbvision_set_video_format"; 1638 int rc; 1639 unsigned char value[2]; 1640 1641 if (!USBVISION_IS_OPERATIONAL(usbvision)) 1642 return 0; 1643 1644 PDEBUG(DBG_FUNC, "isoc_mode %#02x", format); 1645 1646 if ((format != ISOC_MODE_YUV422) 1647 && (format != ISOC_MODE_YUV420) 1648 && (format != ISOC_MODE_COMPRESS)) { 1649 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420", 1650 format); 1651 format = ISOC_MODE_YUV420; 1652 } 1653 value[0] = 0x0A; /* TODO: See the effect of the filter */ 1654 value[1] = format; /* Sets the VO_MODE register which follows FILT_CONT */ 1655 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 1656 USBVISION_OP_CODE, 1657 USB_DIR_OUT | USB_TYPE_VENDOR | 1658 USB_RECIP_ENDPOINT, 0, 1659 (__u16) USBVISION_FILT_CONT, value, 2, HZ); 1660 1661 if (rc < 0) { 1662 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - " 1663 "reconnect or reload driver.\n", proc, rc); 1664 } 1665 usbvision->isoc_mode = format; 1666 return rc; 1667} 1668 1669/* 1670 * usbvision_set_output() 1671 * 1672 */ 1673 1674int usbvision_set_output(struct usb_usbvision *usbvision, int width, 1675 int height) 1676{ 1677 int err_code = 0; 1678 int usb_width, usb_height; 1679 unsigned int frame_rate = 0, frame_drop = 0; 1680 unsigned char value[4]; 1681 1682 if (!USBVISION_IS_OPERATIONAL(usbvision)) 1683 return 0; 1684 1685 if (width > MAX_USB_WIDTH) { 1686 usb_width = width / 2; 1687 usbvision->stretch_width = 2; 1688 } else { 1689 usb_width = width; 1690 usbvision->stretch_width = 1; 1691 } 1692 1693 if (height > MAX_USB_HEIGHT) { 1694 usb_height = height / 2; 1695 usbvision->stretch_height = 2; 1696 } else { 1697 usb_height = height; 1698 usbvision->stretch_height = 1; 1699 } 1700 1701 RESTRICT_TO_RANGE(usb_width, MIN_FRAME_WIDTH, MAX_USB_WIDTH); 1702 usb_width &= ~(MIN_FRAME_WIDTH-1); 1703 RESTRICT_TO_RANGE(usb_height, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT); 1704 usb_height &= ~(1); 1705 1706 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d", 1707 usb_width, usb_height, width, height, 1708 usbvision->stretch_width, usbvision->stretch_height); 1709 1710 /* I'll not rewrite the same values */ 1711 if ((usb_width != usbvision->curwidth) || (usb_height != usbvision->curheight)) { 1712 value[0] = usb_width & 0xff; /* LSB */ 1713 value[1] = (usb_width >> 8) & 0x03; /* MSB */ 1714 value[2] = usb_height & 0xff; /* LSB */ 1715 value[3] = (usb_height >> 8) & 0x03; /* MSB */ 1716 1717 err_code = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 1718 USBVISION_OP_CODE, 1719 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 1720 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ); 1721 1722 if (err_code < 0) { 1723 dev_err(&usbvision->dev->dev, 1724 "%s failed: error %d\n", __func__, err_code); 1725 return err_code; 1726 } 1727 usbvision->curwidth = usbvision->stretch_width * usb_width; 1728 usbvision->curheight = usbvision->stretch_height * usb_height; 1729 } 1730 1731 if (usbvision->isoc_mode == ISOC_MODE_YUV422) 1732 frame_rate = (usbvision->isoc_packet_size * 1000) / (usb_width * usb_height * 2); 1733 else if (usbvision->isoc_mode == ISOC_MODE_YUV420) 1734 frame_rate = (usbvision->isoc_packet_size * 1000) / ((usb_width * usb_height * 12) / 8); 1735 else 1736 frame_rate = FRAMERATE_MAX; 1737 1738 if (usbvision->tvnorm_id & V4L2_STD_625_50) 1739 frame_drop = frame_rate * 32 / 25 - 1; 1740 else if (usbvision->tvnorm_id & V4L2_STD_525_60) 1741 frame_drop = frame_rate * 32 / 30 - 1; 1742 1743 RESTRICT_TO_RANGE(frame_drop, FRAMERATE_MIN, FRAMERATE_MAX); 1744 1745 PDEBUG(DBG_FUNC, "frame_rate %d fps, frame_drop %d", frame_rate, frame_drop); 1746 1747 frame_drop = FRAMERATE_MAX; /* We can allow the maximum here, because dropping is controlled */ 1748 1749 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) { 1750 if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_PAL) 1751 frame_drop = 25; 1752 else 1753 frame_drop = 30; 1754 } 1755 1756 /* frame_drop = 7; => frame_phase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ... 1757 => frame_skip = 4; 1758 => frame_rate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25; 1759 1760 frame_drop = 9; => frame_phase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ... 1761 => frame_skip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ... 1762 => frame_rate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125; 1763 */ 1764 err_code = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frame_drop); 1765 return err_code; 1766} 1767 1768 1769/* 1770 * usbvision_frames_alloc 1771 * allocate the required frames 1772 */ 1773int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames) 1774{ 1775 int i; 1776 1777 /* needs to be page aligned cause the buffers can be mapped individually! */ 1778 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth * 1779 usbvision->curheight * 1780 usbvision->palette.bytes_per_pixel); 1781 1782 /* Try to do my best to allocate the frames the user want in the remaining memory */ 1783 usbvision->num_frames = number_of_frames; 1784 while (usbvision->num_frames > 0) { 1785 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size; 1786 usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size); 1787 if (usbvision->fbuf) 1788 break; 1789 usbvision->num_frames--; 1790 } 1791 1792 spin_lock_init(&usbvision->queue_lock); 1793 init_waitqueue_head(&usbvision->wait_frame); 1794 init_waitqueue_head(&usbvision->wait_stream); 1795 1796 /* Allocate all buffers */ 1797 for (i = 0; i < usbvision->num_frames; i++) { 1798 usbvision->frame[i].index = i; 1799 usbvision->frame[i].grabstate = frame_state_unused; 1800 usbvision->frame[i].data = usbvision->fbuf + 1801 i * usbvision->max_frame_size; 1802 /* 1803 * Set default sizes for read operation. 1804 */ 1805 usbvision->stretch_width = 1; 1806 usbvision->stretch_height = 1; 1807 usbvision->frame[i].width = usbvision->curwidth; 1808 usbvision->frame[i].height = usbvision->curheight; 1809 usbvision->frame[i].bytes_read = 0; 1810 } 1811 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)", 1812 usbvision->num_frames, usbvision->max_frame_size); 1813 return usbvision->num_frames; 1814} 1815 1816/* 1817 * usbvision_frames_free 1818 * frees memory allocated for the frames 1819 */ 1820void usbvision_frames_free(struct usb_usbvision *usbvision) 1821{ 1822 /* Have to free all that memory */ 1823 PDEBUG(DBG_FUNC, "free %d frames", usbvision->num_frames); 1824 1825 if (usbvision->fbuf != NULL) { 1826 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size); 1827 usbvision->fbuf = NULL; 1828 1829 usbvision->num_frames = 0; 1830 } 1831} 1832/* 1833 * usbvision_empty_framequeues() 1834 * prepare queues for incoming and outgoing frames 1835 */ 1836void usbvision_empty_framequeues(struct usb_usbvision *usbvision) 1837{ 1838 u32 i; 1839 1840 INIT_LIST_HEAD(&(usbvision->inqueue)); 1841 INIT_LIST_HEAD(&(usbvision->outqueue)); 1842 1843 for (i = 0; i < USBVISION_NUMFRAMES; i++) { 1844 usbvision->frame[i].grabstate = frame_state_unused; 1845 usbvision->frame[i].bytes_read = 0; 1846 } 1847} 1848 1849/* 1850 * usbvision_stream_interrupt() 1851 * stops streaming 1852 */ 1853int usbvision_stream_interrupt(struct usb_usbvision *usbvision) 1854{ 1855 int ret = 0; 1856 1857 /* stop reading from the device */ 1858 1859 usbvision->streaming = stream_interrupt; 1860 ret = wait_event_timeout(usbvision->wait_stream, 1861 (usbvision->streaming == stream_idle), 1862 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES)); 1863 return ret; 1864} 1865 1866/* 1867 * usbvision_set_compress_params() 1868 * 1869 */ 1870 1871static int usbvision_set_compress_params(struct usb_usbvision *usbvision) 1872{ 1873 static const char proc[] = "usbvision_set_compresion_params: "; 1874 int rc; 1875 unsigned char value[6]; 1876 1877 value[0] = 0x0F; /* Intra-Compression cycle */ 1878 value[1] = 0x01; /* Reg.45 one line per strip */ 1879 value[2] = 0x00; /* Reg.46 Force intra mode on all new frames */ 1880 value[3] = 0x00; /* Reg.47 FORCE_UP <- 0 normal operation (not force) */ 1881 value[4] = 0xA2; /* Reg.48 BUF_THR I'm not sure if this does something in not compressed mode. */ 1882 value[5] = 0x00; /* Reg.49 DVI_YUV This has nothing to do with compression */ 1883 1884 /* catched values for NT1004 */ 1885 /* value[0] = 0xFF; Never apply intra mode automatically */ 1886 /* value[1] = 0xF1; Use full frame height for virtual strip width; One line per strip */ 1887 /* value[2] = 0x01; Force intra mode on all new frames */ 1888 /* value[3] = 0x00; Strip size 400 Bytes; do not force up */ 1889 /* value[4] = 0xA2; */ 1890 if (!USBVISION_IS_OPERATIONAL(usbvision)) 1891 return 0; 1892 1893 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 1894 USBVISION_OP_CODE, 1895 USB_DIR_OUT | USB_TYPE_VENDOR | 1896 USB_RECIP_ENDPOINT, 0, 1897 (__u16) USBVISION_INTRA_CYC, value, 5, HZ); 1898 1899 if (rc < 0) { 1900 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " 1901 "reconnect or reload driver.\n", proc, rc); 1902 return rc; 1903 } 1904 1905 if (usbvision->bridge_type == BRIDGE_NT1004) { 1906 value[0] = 20; /* PCM Threshold 1 */ 1907 value[1] = 12; /* PCM Threshold 2 */ 1908 value[2] = 255; /* Distortion Threshold inter */ 1909 value[3] = 255; /* Distortion Threshold intra */ 1910 value[4] = 43; /* Max Distortion inter */ 1911 value[5] = 43; /* Max Distortion intra */ 1912 } else { 1913 value[0] = 20; /* PCM Threshold 1 */ 1914 value[1] = 12; /* PCM Threshold 2 */ 1915 value[2] = 255; /* Distortion Threshold d7-d0 */ 1916 value[3] = 0; /* Distortion Threshold d11-d8 */ 1917 value[4] = 43; /* Max Distortion d7-d0 */ 1918 value[5] = 0; /* Max Distortion d8 */ 1919 } 1920 1921 if (!USBVISION_IS_OPERATIONAL(usbvision)) 1922 return 0; 1923 1924 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 1925 USBVISION_OP_CODE, 1926 USB_DIR_OUT | USB_TYPE_VENDOR | 1927 USB_RECIP_ENDPOINT, 0, 1928 (__u16) USBVISION_PCM_THR1, value, 6, HZ); 1929 1930 if (rc < 0) { 1931 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " 1932 "reconnect or reload driver.\n", proc, rc); 1933 } 1934 return rc; 1935} 1936 1937 1938/* 1939 * usbvision_set_input() 1940 * 1941 * Set the input (saa711x, ...) size x y and other misc input params 1942 * I've no idea if this parameters are right 1943 * 1944 */ 1945int usbvision_set_input(struct usb_usbvision *usbvision) 1946{ 1947 static const char proc[] = "usbvision_set_input: "; 1948 int rc; 1949 unsigned char value[8]; 1950 unsigned char dvi_yuv_value; 1951 1952 if (!USBVISION_IS_OPERATIONAL(usbvision)) 1953 return 0; 1954 1955 /* Set input format expected from decoder*/ 1956 if (usbvision_device_data[usbvision->dev_model].vin_reg1_override) { 1957 value[0] = usbvision_device_data[usbvision->dev_model].vin_reg1; 1958 } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) { 1959 /* SAA7113 uses 8 bit output */ 1960 value[0] = USBVISION_8_422_SYNC; 1961 } else { 1962 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses 1963 * as that is how saa7111 is configured */ 1964 value[0] = USBVISION_16_422_SYNC; 1965 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/ 1966 } 1967 1968 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]); 1969 if (rc < 0) { 1970 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " 1971 "reconnect or reload driver.\n", proc, rc); 1972 return rc; 1973 } 1974 1975 1976 if (usbvision->tvnorm_id & V4L2_STD_PAL) { 1977 value[0] = 0xC0; 1978 value[1] = 0x02; /* 0x02C0 -> 704 Input video line length */ 1979 value[2] = 0x20; 1980 value[3] = 0x01; /* 0x0120 -> 288 Input video n. of lines */ 1981 value[4] = 0x60; 1982 value[5] = 0x00; /* 0x0060 -> 96 Input video h offset */ 1983 value[6] = 0x16; 1984 value[7] = 0x00; /* 0x0016 -> 22 Input video v offset */ 1985 } else if (usbvision->tvnorm_id & V4L2_STD_SECAM) { 1986 value[0] = 0xC0; 1987 value[1] = 0x02; /* 0x02C0 -> 704 Input video line length */ 1988 value[2] = 0x20; 1989 value[3] = 0x01; /* 0x0120 -> 288 Input video n. of lines */ 1990 value[4] = 0x01; 1991 value[5] = 0x00; /* 0x0001 -> 01 Input video h offset */ 1992 value[6] = 0x01; 1993 value[7] = 0x00; /* 0x0001 -> 01 Input video v offset */ 1994 } else { /* V4L2_STD_NTSC */ 1995 value[0] = 0xD0; 1996 value[1] = 0x02; /* 0x02D0 -> 720 Input video line length */ 1997 value[2] = 0xF0; 1998 value[3] = 0x00; /* 0x00F0 -> 240 Input video number of lines */ 1999 value[4] = 0x50; 2000 value[5] = 0x00; /* 0x0050 -> 80 Input video h offset */ 2001 value[6] = 0x10; 2002 value[7] = 0x00; /* 0x0010 -> 16 Input video v offset */ 2003 } 2004 2005 /* webcam is only 480 pixels wide, both PAL and NTSC version */ 2006 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) { 2007 value[0] = 0xe0; 2008 value[1] = 0x01; /* 0x01E0 -> 480 Input video line length */ 2009 } 2010 2011 if (usbvision_device_data[usbvision->dev_model].x_offset >= 0) { 2012 value[4] = usbvision_device_data[usbvision->dev_model].x_offset & 0xff; 2013 value[5] = (usbvision_device_data[usbvision->dev_model].x_offset & 0x0300) >> 8; 2014 } 2015 2016 if (adjust_x_offset != -1) { 2017 value[4] = adjust_x_offset & 0xff; 2018 value[5] = (adjust_x_offset & 0x0300) >> 8; 2019 } 2020 2021 if (usbvision_device_data[usbvision->dev_model].y_offset >= 0) { 2022 value[6] = usbvision_device_data[usbvision->dev_model].y_offset & 0xff; 2023 value[7] = (usbvision_device_data[usbvision->dev_model].y_offset & 0x0300) >> 8; 2024 } 2025 2026 if (adjust_y_offset != -1) { 2027 value[6] = adjust_y_offset & 0xff; 2028 value[7] = (adjust_y_offset & 0x0300) >> 8; 2029 } 2030 2031 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 2032 USBVISION_OP_CODE, /* USBVISION specific code */ 2033 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0, 2034 (__u16) USBVISION_LXSIZE_I, value, 8, HZ); 2035 if (rc < 0) { 2036 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " 2037 "reconnect or reload driver.\n", proc, rc); 2038 return rc; 2039 } 2040 2041 2042 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */ 2043 2044 if (usbvision_device_data[usbvision->dev_model].dvi_yuv_override) { 2045 dvi_yuv_value = usbvision_device_data[usbvision->dev_model].dvi_yuv; 2046 } else if (usbvision_device_data[usbvision->dev_model].codec == CODEC_SAA7113) { 2047 /* This changes as the fine sync control changes. Further investigation necessary */ 2048 dvi_yuv_value = 0x06; 2049 } 2050 2051 return usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value); 2052} 2053 2054 2055/* 2056 * usbvision_set_dram_settings() 2057 * 2058 * Set the buffer address needed by the usbvision dram to operate 2059 * This values has been taken with usbsnoop. 2060 * 2061 */ 2062 2063static int usbvision_set_dram_settings(struct usb_usbvision *usbvision) 2064{ 2065 int rc; 2066 unsigned char value[8]; 2067 2068 if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) { 2069 value[0] = 0x42; 2070 value[1] = 0x71; 2071 value[2] = 0xff; 2072 value[3] = 0x00; 2073 value[4] = 0x98; 2074 value[5] = 0xe0; 2075 value[6] = 0x71; 2076 value[7] = 0xff; 2077 /* UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte) */ 2078 /* FDL: 0x00000-0x0E099 = 57498 Words */ 2079 /* VDW: 0x0E3FF-0x3FFFF */ 2080 } else { 2081 value[0] = 0x42; 2082 value[1] = 0x00; 2083 value[2] = 0xff; 2084 value[3] = 0x00; 2085 value[4] = 0x00; 2086 value[5] = 0x00; 2087 value[6] = 0x00; 2088 value[7] = 0xff; 2089 } 2090 /* These are the values of the address of the video buffer, 2091 * they have to be loaded into the USBVISION_DRM_PRM1-8 2092 * 2093 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000 2094 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff 2095 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000 2096 * Only used in compressed mode 2097 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff 2098 * Only used in compressed mode 2099 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000 2100 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff 2101 */ 2102 2103 if (!USBVISION_IS_OPERATIONAL(usbvision)) 2104 return 0; 2105 2106 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), 2107 USBVISION_OP_CODE, /* USBVISION specific code */ 2108 USB_DIR_OUT | USB_TYPE_VENDOR | 2109 USB_RECIP_ENDPOINT, 0, 2110 (__u16) USBVISION_DRM_PRM1, value, 8, HZ); 2111 2112 if (rc < 0) { 2113 dev_err(&usbvision->dev->dev, "%s: ERROR=%d\n", __func__, rc); 2114 return rc; 2115 } 2116 2117 /* Restart the video buffer logic */ 2118 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR | 2119 USBVISION_RES_FDL | USBVISION_RES_VDW); 2120 if (rc < 0) 2121 return rc; 2122 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00); 2123 2124 return rc; 2125} 2126 2127/* 2128 * () 2129 * 2130 * Power on the device, enables suspend-resume logic 2131 * & reset the isoc End-Point 2132 * 2133 */ 2134 2135int usbvision_power_on(struct usb_usbvision *usbvision) 2136{ 2137 int err_code = 0; 2138 2139 PDEBUG(DBG_FUNC, ""); 2140 2141 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN); 2142 usbvision_write_reg(usbvision, USBVISION_PWR_REG, 2143 USBVISION_SSPND_EN | USBVISION_RES2); 2144 2145 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) { 2146 usbvision_write_reg(usbvision, USBVISION_VIN_REG1, 2147 USBVISION_16_422_SYNC | USBVISION_HVALID_PO); 2148 usbvision_write_reg(usbvision, USBVISION_VIN_REG2, 2149 USBVISION_NOHVALID | USBVISION_KEEP_BLANK); 2150 } 2151 usbvision_write_reg(usbvision, USBVISION_PWR_REG, 2152 USBVISION_SSPND_EN | USBVISION_PWR_VID); 2153 mdelay(10); 2154 err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG, 2155 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2); 2156 if (err_code == 1) 2157 usbvision->power = 1; 2158 PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code < 0) ? "ERROR" : "power is on", err_code); 2159 return err_code; 2160} 2161 2162 2163/* 2164 * usbvision timer stuff 2165 */ 2166 2167/* to call usbvision_power_off from task queue */ 2168static void call_usbvision_power_off(struct work_struct *work) 2169{ 2170 struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, power_off_work); 2171 2172 PDEBUG(DBG_FUNC, ""); 2173 if (mutex_lock_interruptible(&usbvision->v4l2_lock)) 2174 return; 2175 2176 if (usbvision->user == 0) { 2177 usbvision_i2c_unregister(usbvision); 2178 2179 usbvision_power_off(usbvision); 2180 usbvision->initialized = 0; 2181 } 2182 mutex_unlock(&usbvision->v4l2_lock); 2183} 2184 2185static void usbvision_power_off_timer(unsigned long data) 2186{ 2187 struct usb_usbvision *usbvision = (void *)data; 2188 2189 PDEBUG(DBG_FUNC, ""); 2190 del_timer(&usbvision->power_off_timer); 2191 INIT_WORK(&usbvision->power_off_work, call_usbvision_power_off); 2192 (void) schedule_work(&usbvision->power_off_work); 2193} 2194 2195void usbvision_init_power_off_timer(struct usb_usbvision *usbvision) 2196{ 2197 setup_timer(&usbvision->power_off_timer, usbvision_power_off_timer, 2198 (unsigned long)usbvision); 2199} 2200 2201void usbvision_set_power_off_timer(struct usb_usbvision *usbvision) 2202{ 2203 mod_timer(&usbvision->power_off_timer, jiffies + USBVISION_POWEROFF_TIME); 2204} 2205 2206void usbvision_reset_power_off_timer(struct usb_usbvision *usbvision) 2207{ 2208 if (timer_pending(&usbvision->power_off_timer)) 2209 del_timer(&usbvision->power_off_timer); 2210} 2211 2212/* 2213 * usbvision_begin_streaming() 2214 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no 2215 * idea about the rest 2216 */ 2217int usbvision_begin_streaming(struct usb_usbvision *usbvision) 2218{ 2219 if (usbvision->isoc_mode == ISOC_MODE_COMPRESS) 2220 usbvision_init_compression(usbvision); 2221 return usbvision_write_reg(usbvision, USBVISION_VIN_REG2, 2222 USBVISION_NOHVALID | usbvision->vin_reg2_preset); 2223} 2224 2225/* 2226 * usbvision_restart_isoc() 2227 * Not sure yet if touching here PWR_REG make loose the config 2228 */ 2229 2230int usbvision_restart_isoc(struct usb_usbvision *usbvision) 2231{ 2232 int ret; 2233 2234 ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG, 2235 USBVISION_SSPND_EN | USBVISION_PWR_VID); 2236 if (ret < 0) 2237 return ret; 2238 ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG, 2239 USBVISION_SSPND_EN | USBVISION_PWR_VID | 2240 USBVISION_RES2); 2241 if (ret < 0) 2242 return ret; 2243 ret = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, 2244 USBVISION_KEEP_BLANK | USBVISION_NOHVALID | 2245 usbvision->vin_reg2_preset); 2246 if (ret < 0) 2247 return ret; 2248 2249 /* TODO: schedule timeout */ 2250 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1) 2251 ; 2252 2253 return 0; 2254} 2255 2256int usbvision_audio_off(struct usb_usbvision *usbvision) 2257{ 2258 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) { 2259 printk(KERN_ERR "usbvision_audio_off: can't write reg\n"); 2260 return -1; 2261 } 2262 usbvision->audio_mute = 0; 2263 usbvision->audio_channel = USBVISION_AUDIO_MUTE; 2264 return 0; 2265} 2266 2267int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel) 2268{ 2269 if (!usbvision->audio_mute) { 2270 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, audio_channel) < 0) { 2271 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n"); 2272 return -1; 2273 } 2274 } 2275 usbvision->audio_channel = audio_channel; 2276 return 0; 2277} 2278 2279int usbvision_setup(struct usb_usbvision *usbvision, int format) 2280{ 2281 if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) 2282 usbvision_init_webcam(usbvision); 2283 usbvision_set_video_format(usbvision, format); 2284 usbvision_set_dram_settings(usbvision); 2285 usbvision_set_compress_params(usbvision); 2286 usbvision_set_input(usbvision); 2287 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT); 2288 usbvision_restart_isoc(usbvision); 2289 2290 /* cosas del PCM */ 2291 return USBVISION_IS_OPERATIONAL(usbvision); 2292} 2293 2294int usbvision_set_alternate(struct usb_usbvision *dev) 2295{ 2296 int err_code, prev_alt = dev->iface_alt; 2297 int i; 2298 2299 dev->iface_alt = 0; 2300 for (i = 0; i < dev->num_alt; i++) 2301 if (dev->alt_max_pkt_size[i] > dev->alt_max_pkt_size[dev->iface_alt]) 2302 dev->iface_alt = i; 2303 2304 if (dev->iface_alt != prev_alt) { 2305 dev->isoc_packet_size = dev->alt_max_pkt_size[dev->iface_alt]; 2306 PDEBUG(DBG_FUNC, "setting alternate %d with max_packet_size=%u", 2307 dev->iface_alt, dev->isoc_packet_size); 2308 err_code = usb_set_interface(dev->dev, dev->iface, dev->iface_alt); 2309 if (err_code < 0) { 2310 dev_err(&dev->dev->dev, 2311 "cannot change alternate number to %d (error=%i)\n", 2312 dev->iface_alt, err_code); 2313 return err_code; 2314 } 2315 } 2316 2317 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isoc_packet_size); 2318 2319 return 0; 2320} 2321 2322/* 2323 * usbvision_init_isoc() 2324 * 2325 */ 2326int usbvision_init_isoc(struct usb_usbvision *usbvision) 2327{ 2328 struct usb_device *dev = usbvision->dev; 2329 int buf_idx, err_code, reg_value; 2330 int sb_size; 2331 2332 if (!USBVISION_IS_OPERATIONAL(usbvision)) 2333 return -EFAULT; 2334 2335 usbvision->cur_frame = NULL; 2336 scratch_reset(usbvision); 2337 2338 /* Alternate interface 1 is is the biggest frame size */ 2339 err_code = usbvision_set_alternate(usbvision); 2340 if (err_code < 0) { 2341 usbvision->last_error = err_code; 2342 return -EBUSY; 2343 } 2344 sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size; 2345 2346 reg_value = (16 - usbvision_read_reg(usbvision, 2347 USBVISION_ALTER_REG)) & 0x0F; 2348 2349 usbvision->usb_bandwidth = reg_value >> 1; 2350 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", 2351 usbvision->usb_bandwidth); 2352 2353 2354 2355 /* We double buffer the Iso lists */ 2356 2357 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) { 2358 int j, k; 2359 struct urb *urb; 2360 2361 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL); 2362 if (urb == NULL) { 2363 dev_err(&usbvision->dev->dev, 2364 "%s: usb_alloc_urb() failed\n", __func__); 2365 return -ENOMEM; 2366 } 2367 usbvision->sbuf[buf_idx].urb = urb; 2368 usbvision->sbuf[buf_idx].data = 2369 usb_alloc_coherent(usbvision->dev, 2370 sb_size, 2371 GFP_KERNEL, 2372 &urb->transfer_dma); 2373 urb->dev = dev; 2374 urb->context = usbvision; 2375 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp); 2376 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; 2377 urb->interval = 1; 2378 urb->transfer_buffer = usbvision->sbuf[buf_idx].data; 2379 urb->complete = usbvision_isoc_irq; 2380 urb->number_of_packets = USBVISION_URB_FRAMES; 2381 urb->transfer_buffer_length = 2382 usbvision->isoc_packet_size * USBVISION_URB_FRAMES; 2383 for (j = k = 0; j < USBVISION_URB_FRAMES; j++, 2384 k += usbvision->isoc_packet_size) { 2385 urb->iso_frame_desc[j].offset = k; 2386 urb->iso_frame_desc[j].length = 2387 usbvision->isoc_packet_size; 2388 } 2389 } 2390 2391 /* Submit all URBs */ 2392 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) { 2393 err_code = usb_submit_urb(usbvision->sbuf[buf_idx].urb, 2394 GFP_KERNEL); 2395 if (err_code) { 2396 dev_err(&usbvision->dev->dev, 2397 "%s: usb_submit_urb(%d) failed: error %d\n", 2398 __func__, buf_idx, err_code); 2399 } 2400 } 2401 2402 usbvision->streaming = stream_idle; 2403 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", 2404 __func__, 2405 usbvision->video_endp); 2406 return 0; 2407} 2408 2409/* 2410 * usbvision_stop_isoc() 2411 * 2412 * This procedure stops streaming and deallocates URBs. Then it 2413 * activates zero-bandwidth alt. setting of the video interface. 2414 * 2415 */ 2416void usbvision_stop_isoc(struct usb_usbvision *usbvision) 2417{ 2418 int buf_idx, err_code, reg_value; 2419 int sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size; 2420 2421 if ((usbvision->streaming == stream_off) || (usbvision->dev == NULL)) 2422 return; 2423 2424 /* Unschedule all of the iso td's */ 2425 for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) { 2426 usb_kill_urb(usbvision->sbuf[buf_idx].urb); 2427 if (usbvision->sbuf[buf_idx].data) { 2428 usb_free_coherent(usbvision->dev, 2429 sb_size, 2430 usbvision->sbuf[buf_idx].data, 2431 usbvision->sbuf[buf_idx].urb->transfer_dma); 2432 } 2433 usb_free_urb(usbvision->sbuf[buf_idx].urb); 2434 usbvision->sbuf[buf_idx].urb = NULL; 2435 } 2436 2437 PDEBUG(DBG_ISOC, "%s: streaming=stream_off\n", __func__); 2438 usbvision->streaming = stream_off; 2439 2440 if (!usbvision->remove_pending) { 2441 /* Set packet size to 0 */ 2442 usbvision->iface_alt = 0; 2443 err_code = usb_set_interface(usbvision->dev, usbvision->iface, 2444 usbvision->iface_alt); 2445 if (err_code < 0) { 2446 dev_err(&usbvision->dev->dev, 2447 "%s: usb_set_interface() failed: error %d\n", 2448 __func__, err_code); 2449 usbvision->last_error = err_code; 2450 } 2451 reg_value = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F; 2452 usbvision->isoc_packet_size = 2453 (reg_value == 0) ? 0 : (reg_value * 64) - 1; 2454 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", 2455 usbvision->isoc_packet_size); 2456 2457 usbvision->usb_bandwidth = reg_value >> 1; 2458 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", 2459 usbvision->usb_bandwidth); 2460 } 2461} 2462 2463int usbvision_muxsel(struct usb_usbvision *usbvision, int channel) 2464{ 2465 /* inputs #0 and #3 are constant for every SAA711x. */ 2466 /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */ 2467 int mode[4] = { SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3 }; 2468 int audio[] = { 1, 0, 0, 0 }; 2469 /* channel 0 is TV with audiochannel 1 (tuner mono) */ 2470 /* channel 1 is Composite with audio channel 0 (line in) */ 2471 /* channel 2 is S-Video with audio channel 0 (line in) */ 2472 /* channel 3 is additional video inputs to the device with audio channel 0 (line in) */ 2473 2474 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs); 2475 usbvision->ctl_input = channel; 2476 2477 /* set the new channel */ 2478 /* Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video */ 2479 /* Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red */ 2480 2481 switch (usbvision_device_data[usbvision->dev_model].codec) { 2482 case CODEC_SAA7113: 2483 mode[1] = SAA7115_COMPOSITE2; 2484 if (switch_svideo_input) { 2485 /* To handle problems with S-Video Input for 2486 * some devices. Use switch_svideo_input 2487 * parameter when loading the module.*/ 2488 mode[2] = SAA7115_COMPOSITE1; 2489 } else { 2490 mode[2] = SAA7115_SVIDEO1; 2491 } 2492 break; 2493 case CODEC_SAA7111: 2494 default: 2495 /* modes for saa7111 */ 2496 mode[1] = SAA7115_COMPOSITE1; 2497 mode[2] = SAA7115_SVIDEO1; 2498 break; 2499 } 2500 call_all(usbvision, video, s_routing, mode[channel], 0, 0); 2501 usbvision_set_audio(usbvision, audio[channel]); 2502 return 0; 2503} 2504