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V4L/DVB (5012): Usbvision fix: It was using "&&" instead "&"
[linux-2.6.22.y-op.git] / drivers / media / video / usbvision / usbvision-core.c
bloba807d971e27357accfb2e26128e9db6c7563b54f
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/sched.h>
28 #include <linux/list.h>
29 #include <linux/timer.h>
30 #include <linux/slab.h>
31 #include <linux/mm.h>
32 #include <linux/utsname.h>
33 #include <linux/highmem.h>
34 #include <linux/smp_lock.h>
35 #include <linux/videodev.h>
36 #include <linux/vmalloc.h>
37 #include <linux/module.h>
38 #include <linux/init.h>
39 #include <linux/spinlock.h>
40 #include <asm/io.h>
41 #include <linux/videodev2.h>
42 #include <linux/video_decoder.h>
43 #include <linux/i2c.h>
44
45 #include <media/saa7115.h>
46 #include <media/v4l2-common.h>
47 #include <media/tuner.h>
48 #include <media/audiochip.h>
49
50 #include <linux/moduleparam.h>
51 #include <linux/workqueue.h>
52
53 #ifdef CONFIG_KMOD
54 #include <linux/kmod.h>
55 #endif
56
57 #include "usbvision.h"
58
59 static unsigned int core_debug = 0;
60 module_param(core_debug,int,0644);
61 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
62
63 static unsigned int force_testpattern = 0;
64 module_param(force_testpattern,int,0644);
65 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
66
67 static int adjustCompression = 1; // Set the compression to be adaptive
68 module_param(adjustCompression, int, 0444);
69 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device. Default: 1 (On)");
70
71 static int SwitchSVideoInput = 0; // To help people with Black and White output with using s-video input. Some cables and input device are wired differently.
72 module_param(SwitchSVideoInput, int, 0444);
73 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)");
74
75 #define ENABLE_HEXDUMP 0 /* Enable if you need it */
76
77
78 #ifdef USBVISION_DEBUG
79 #define PDEBUG(level, fmt, args...) \
80 if (core_debug & (level)) info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args)
81 #else
82 #define PDEBUG(level, fmt, args...) do {} while(0)
83 #endif
84
85 #define DBG_HEADER 1<<0
86 #define DBG_IRQ 1<<1
87 #define DBG_ISOC 1<<2
88 #define DBG_PARSE 1<<3
89 #define DBG_SCRATCH 1<<4
90 #define DBG_FUNC 1<<5
91
92 static const int max_imgwidth = MAX_FRAME_WIDTH;
93 static const int max_imgheight = MAX_FRAME_HEIGHT;
94 static const int min_imgwidth = MIN_FRAME_WIDTH;
95 static const int min_imgheight = MIN_FRAME_HEIGHT;
96
97 /* The value of 'scratch_buf_size' affects quality of the picture
98 * in many ways. Shorter buffers may cause loss of data when client
99 * is too slow. Larger buffers are memory-consuming and take longer
100 * to work with. This setting can be adjusted, but the default value
101 * should be OK for most desktop users.
102 */
103 #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) // 128kB memory scratch buffer
104 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
105
106 // Function prototypes
107 static int usbvision_request_intra (struct usb_usbvision *usbvision);
108 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
109 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
110 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
111
112 /*******************************/
113 /* Memory management functions */
114 /*******************************/
115
116 /*
117 * Here we want the physical address of the memory.
118 * This is used when initializing the contents of the area.
119 */
120
121 static void *usbvision_rvmalloc(unsigned long size)
122 {
123 void *mem;
124 unsigned long adr;
125
126 size = PAGE_ALIGN(size);
127 mem = vmalloc_32(size);
128 if (!mem)
129 return NULL;
130
131 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
132 adr = (unsigned long) mem;
133 while (size > 0) {
134 SetPageReserved(vmalloc_to_page((void *)adr));
135 adr += PAGE_SIZE;
136 size -= PAGE_SIZE;
137 }
138
139 return mem;
140 }
141
142 void usbvision_rvfree(void *mem, unsigned long size)
143 {
144 unsigned long adr;
145
146 if (!mem)
147 return;
148
149 size = PAGE_ALIGN(size);
150
151 adr = (unsigned long) mem;
152 while ((long) size > 0) {
153 ClearPageReserved(vmalloc_to_page((void *)adr));
154 adr += PAGE_SIZE;
155 size -= PAGE_SIZE;
156 }
157
158 vfree(mem);
159 }
160
161
162
163 #if ENABLE_HEXDUMP
164 static void usbvision_hexdump(const unsigned char *data, int len)
165 {
166 char tmp[80];
167 int i, k;
168
169 for (i = k = 0; len > 0; i++, len--) {
170 if (i > 0 && (i % 16 == 0)) {
171 printk("%s\n", tmp);
172 k = 0;
173 }
174 k += sprintf(&tmp[k], "%02x ", data[i]);
175 }
176 if (k > 0)
177 printk("%s\n", tmp);
178 }
179 #endif
180
181 /********************************
182 * scratch ring buffer handling
183 ********************************/
184 static int scratch_len(struct usb_usbvision *usbvision) /*This returns the amount of data actually in the buffer */
185 {
186 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
187 if (len < 0) {
188 len += scratch_buf_size;
189 }
190 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
191
192 return len;
193 }
194
195
196 /* This returns the free space left in the buffer */
197 static int scratch_free(struct usb_usbvision *usbvision)
198 {
199 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
200 if (free <= 0) {
201 free += scratch_buf_size;
202 }
203 if (free) {
204 free -= 1; /* at least one byte in the buffer must */
205 /* left blank, otherwise there is no chance to differ between full and empty */
206 }
207 PDEBUG(DBG_SCRATCH, "return %d\n", free);
208
209 return free;
210 }
211
212
213 /* This puts data into the buffer */
214 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
215 int len)
216 {
217 int len_part;
218
219 if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
220 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
221 usbvision->scratch_write_ptr += len;
222 }
223 else {
224 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
225 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
226 if (len == len_part) {
227 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */
228 }
229 else {
230 memcpy(usbvision->scratch, data + len_part, len - len_part);
231 usbvision->scratch_write_ptr = len - len_part;
232 }
233 }
234
235 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
236
237 return len;
238 }
239
240 /* This marks the write_ptr as position of new frame header */
241 static void scratch_mark_header(struct usb_usbvision *usbvision)
242 {
243 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
244
245 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
246 usbvision->scratch_write_ptr;
247 usbvision->scratch_headermarker_write_ptr += 1;
248 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
249 }
250
251 /* This gets data from the buffer at the given "ptr" position */
252 static int scratch_get_extra(struct usb_usbvision *usbvision,
253 unsigned char *data, int *ptr, int len)
254 {
255 int len_part;
256 if (*ptr + len < scratch_buf_size) {
257 memcpy(data, usbvision->scratch + *ptr, len);
258 *ptr += len;
259 }
260 else {
261 len_part = scratch_buf_size - *ptr;
262 memcpy(data, usbvision->scratch + *ptr, len_part);
263 if (len == len_part) {
264 *ptr = 0; /* just set the y_ptr to zero */
265 }
266 else {
267 memcpy(data + len_part, usbvision->scratch, len - len_part);
268 *ptr = len - len_part;
269 }
270 }
271
272 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
273
274 return len;
275 }
276
277
278 /* This sets the scratch extra read pointer */
279 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
280 int len)
281 {
282 *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
283
284 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
285 }
286
287
288 /*This increments the scratch extra read pointer */
289 static void scratch_inc_extra_ptr(int *ptr, int len)
290 {
291 *ptr = (*ptr + len) % scratch_buf_size;
292
293 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
294 }
295
296
297 /* This gets data from the buffer */
298 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
299 int len)
300 {
301 int len_part;
302 if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
303 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
304 usbvision->scratch_read_ptr += len;
305 }
306 else {
307 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
308 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
309 if (len == len_part) {
310 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */
311 }
312 else {
313 memcpy(data + len_part, usbvision->scratch, len - len_part);
314 usbvision->scratch_read_ptr = len - len_part;
315 }
316 }
317
318 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
319
320 return len;
321 }
322
323
324 /* This sets read pointer to next header and returns it */
325 static int scratch_get_header(struct usb_usbvision *usbvision,
326 struct usbvision_frame_header *header)
327 {
328 int errCode = 0;
329
330 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
331
332 while (usbvision->scratch_headermarker_write_ptr -
333 usbvision->scratch_headermarker_read_ptr != 0) {
334 usbvision->scratch_read_ptr =
335 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
336 usbvision->scratch_headermarker_read_ptr += 1;
337 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
338 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
339 if ((header->magic_1 == USBVISION_MAGIC_1)
340 && (header->magic_2 == USBVISION_MAGIC_2)
341 && (header->headerLength == USBVISION_HEADER_LENGTH)) {
342 errCode = USBVISION_HEADER_LENGTH;
343 header->frameWidth = header->frameWidthLo + (header->frameWidthHi << 8);
344 header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
345 break;
346 }
347 }
348
349 return errCode;
350 }
351
352
353 /*This removes len bytes of old data from the buffer */
354 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
355 {
356
357 usbvision->scratch_read_ptr += len;
358 usbvision->scratch_read_ptr %= scratch_buf_size;
359 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
360 }
361
362
363 /*This resets the buffer - kills all data in it too */
364 static void scratch_reset(struct usb_usbvision *usbvision)
365 {
366 PDEBUG(DBG_SCRATCH, "\n");
367
368 usbvision->scratch_read_ptr = 0;
369 usbvision->scratch_write_ptr = 0;
370 usbvision->scratch_headermarker_read_ptr = 0;
371 usbvision->scratch_headermarker_write_ptr = 0;
372 usbvision->isocstate = IsocState_NoFrame;
373 }
374
375 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
376 {
377 usbvision->scratch = vmalloc_32(scratch_buf_size);
378 scratch_reset(usbvision);
379 if(usbvision->scratch == NULL) {
380 err("%s: unable to allocate %d bytes for scratch",
381 __FUNCTION__, scratch_buf_size);
382 return -ENOMEM;
383 }
384 return 0;
385 }
386
387 void usbvision_scratch_free(struct usb_usbvision *usbvision)
388 {
389 if (usbvision->scratch != NULL) {
390 vfree(usbvision->scratch);
391 usbvision->scratch = NULL;
392 }
393 }
394
395 /*
396 * usbvision_testpattern()
397 *
398 * Procedure forms a test pattern (yellow grid on blue background).
399 *
400 * Parameters:
401 * fullframe: if TRUE then entire frame is filled, otherwise the procedure
402 * continues from the current scanline.
403 * pmode 0: fill the frame with solid blue color (like on VCR or TV)
404 * 1: Draw a colored grid
405 *
406 */
407 static void usbvision_testpattern(struct usb_usbvision *usbvision,
408 int fullframe, int pmode)
409 {
410 static const char proc[] = "usbvision_testpattern";
411 struct usbvision_frame *frame;
412 unsigned char *f;
413 int num_cell = 0;
414 int scan_length = 0;
415 static int num_pass = 0;
416
417 if (usbvision == NULL) {
418 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
419 return;
420 }
421 if (usbvision->curFrame == NULL) {
422 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
423 return;
424 }
425
426 /* Grab the current frame */
427 frame = usbvision->curFrame;
428
429 /* Optionally start at the beginning */
430 if (fullframe) {
431 frame->curline = 0;
432 frame->scanlength = 0;
433 }
434
435 /* Form every scan line */
436 for (; frame->curline < frame->frmheight; frame->curline++) {
437 int i;
438
439 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
440 for (i = 0; i < usbvision->curwidth; i++) {
441 unsigned char cb = 0x80;
442 unsigned char cg = 0;
443 unsigned char cr = 0;
444
445 if (pmode == 1) {
446 if (frame->curline % 32 == 0)
447 cb = 0, cg = cr = 0xFF;
448 else if (i % 32 == 0) {
449 if (frame->curline % 32 == 1)
450 num_cell++;
451 cb = 0, cg = cr = 0xFF;
452 } else {
453 cb =
454 ((num_cell * 7) +
455 num_pass) & 0xFF;
456 cg =
457 ((num_cell * 5) +
458 num_pass * 2) & 0xFF;
459 cr =
460 ((num_cell * 3) +
461 num_pass * 3) & 0xFF;
462 }
463 } else {
464 /* Just the blue screen */
465 }
466
467 *f++ = cb;
468 *f++ = cg;
469 *f++ = cr;
470 scan_length += 3;
471 }
472 }
473
474 frame->grabstate = FrameState_Done;
475 frame->scanlength += scan_length;
476 ++num_pass;
477
478 }
479
480 /*
481 * usbvision_decompress_alloc()
482 *
483 * allocates intermediate buffer for decompression
484 */
485 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
486 {
487 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
488 usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
489 if (usbvision->IntraFrameBuffer == NULL) {
490 err("%s: unable to allocate %d for compr. frame buffer", __FUNCTION__, IFB_size);
491 return -ENOMEM;
492 }
493 return 0;
494 }
495
496 /*
497 * usbvision_decompress_free()
498 *
499 * frees intermediate buffer for decompression
500 */
501 void usbvision_decompress_free(struct usb_usbvision *usbvision)
502 {
503 if (usbvision->IntraFrameBuffer != NULL) {
504 vfree(usbvision->IntraFrameBuffer);
505 usbvision->IntraFrameBuffer = NULL;
506 }
507 }
508
509 /************************************************************
510 * Here comes the data parsing stuff that is run as interrupt
511 ************************************************************/
512 /*
513 * usbvision_find_header()
514 *
515 * Locate one of supported header markers in the scratch buffer.
516 */
517 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
518 {
519 struct usbvision_frame *frame;
520 int foundHeader = 0;
521
522 frame = usbvision->curFrame;
523
524 while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
525 // found header in scratch
526 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
527 frame->isocHeader.magic_2,
528 frame->isocHeader.magic_1,
529 frame->isocHeader.headerLength,
530 frame->isocHeader.frameNum,
531 frame->isocHeader.framePhase,
532 frame->isocHeader.frameLatency,
533 frame->isocHeader.dataFormat,
534 frame->isocHeader.formatParam,
535 frame->isocHeader.frameWidth,
536 frame->isocHeader.frameHeight);
537
538 if (usbvision->requestIntra) {
539 if (frame->isocHeader.formatParam & 0x80) {
540 foundHeader = 1;
541 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
542 usbvision_unrequest_intra(usbvision);
543 break;
544 }
545 }
546 else {
547 foundHeader = 1;
548 break;
549 }
550 }
551
552 if (foundHeader) {
553 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
554 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
555 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
556 }
557 else { // no header found
558 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
559 scratch_reset(usbvision);
560 return ParseState_EndParse;
561 }
562
563 // found header
564 if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
565 //check isocHeader.frameNum for lost frames
566 if (usbvision->lastIsocFrameNum >= 0) {
567 if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
568 // unexpected frame drop: need to request new intra frame
569 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
570 usbvision_request_intra(usbvision);
571 return ParseState_NextFrame;
572 }
573 }
574 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
575 }
576 usbvision->header_count++;
577 frame->scanstate = ScanState_Lines;
578 frame->curline = 0;
579
580 if (force_testpattern) {
581 usbvision_testpattern(usbvision, 1, 1);
582 return ParseState_NextFrame;
583 }
584 return ParseState_Continue;
585 }
586
587 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
588 long *pcopylen)
589 {
590 volatile struct usbvision_frame *frame;
591 unsigned char *f;
592 int len;
593 int i;
594 unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
595 unsigned char rv, gv, bv; // RGB components
596 int clipmask_index, bytes_per_pixel;
597 int stretch_bytes, clipmask_add;
598
599 frame = usbvision->curFrame;
600 f = frame->data + (frame->v4l2_linesize * frame->curline);
601
602 /* Make sure there's enough data for the entire line */
603 len = (frame->isocHeader.frameWidth * 2)+5;
604 if (scratch_len(usbvision) < len) {
605 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
606 return ParseState_Out;
607 }
608
609 if ((frame->curline + 1) >= frame->frmheight) {
610 return ParseState_NextFrame;
611 }
612
613 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
614 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
615 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
616 clipmask_add = usbvision->stretch_width;
617
618 for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
619
620 scratch_get(usbvision, &yuyv[0], 4);
621
622 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
623 *f++ = yuyv[0]; // Y
624 *f++ = yuyv[3]; // U
625 }
626 else {
627
628 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
629 switch (frame->v4l2_format.format) {
630 case V4L2_PIX_FMT_RGB565:
631 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
632 *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv);
633 break;
634 case V4L2_PIX_FMT_RGB24:
635 *f++ = bv;
636 *f++ = gv;
637 *f++ = rv;
638 break;
639 case V4L2_PIX_FMT_RGB32:
640 *f++ = bv;
641 *f++ = gv;
642 *f++ = rv;
643 f++;
644 break;
645 case V4L2_PIX_FMT_RGB555:
646 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
647 *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
648 break;
649 }
650 }
651 clipmask_index += clipmask_add;
652 f += stretch_bytes;
653
654 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
655 *f++ = yuyv[2]; // Y
656 *f++ = yuyv[1]; // V
657 }
658 else {
659
660 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
661 switch (frame->v4l2_format.format) {
662 case V4L2_PIX_FMT_RGB565:
663 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
664 *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv);
665 break;
666 case V4L2_PIX_FMT_RGB24:
667 *f++ = bv;
668 *f++ = gv;
669 *f++ = rv;
670 break;
671 case V4L2_PIX_FMT_RGB32:
672 *f++ = bv;
673 *f++ = gv;
674 *f++ = rv;
675 f++;
676 break;
677 case V4L2_PIX_FMT_RGB555:
678 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
679 *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
680 break;
681 }
682 }
683 clipmask_index += clipmask_add;
684 f += stretch_bytes;
685 }
686
687 frame->curline += usbvision->stretch_height;
688 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
689
690 if (frame->curline >= frame->frmheight) {
691 return ParseState_NextFrame;
692 }
693 else {
694 return ParseState_Continue;
695 }
696 }
697
698 /* The decompression routine */
699 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
700 unsigned char *Decompressed, int *StartPos,
701 int *BlockTypeStartPos, int Len)
702 {
703 int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
704 unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
705
706 Integrator = 0;
707 Pos = *StartPos;
708 BlockTypePos = *BlockTypeStartPos;
709 MaxPos = 396; //Pos + Len;
710 ExtraPos = Pos;
711 BlockLen = 0;
712 BlockByte = 0;
713 BlockCode = 0;
714 BlockType = 0;
715 BlockTypeByte = 0;
716 BlockTypeLen = 0;
717 RestPixel = Len;
718
719 for (Idx = 0; Idx < Len; Idx++) {
720
721 if (BlockLen == 0) {
722 if (BlockTypeLen==0) {
723 BlockTypeByte = Compressed[BlockTypePos];
724 BlockTypePos++;
725 BlockTypeLen = 4;
726 }
727 BlockType = (BlockTypeByte & 0xC0) >> 6;
728
729 //statistic:
730 usbvision->ComprBlockTypes[BlockType]++;
731
732 Pos = ExtraPos;
733 if (BlockType == 0) {
734 if(RestPixel >= 24) {
735 Idx += 23;
736 RestPixel -= 24;
737 Integrator = Decompressed[Idx];
738 } else {
739 Idx += RestPixel - 1;
740 RestPixel = 0;
741 }
742 } else {
743 BlockCode = Compressed[Pos];
744 Pos++;
745 if (RestPixel >= 24) {
746 BlockLen = 24;
747 } else {
748 BlockLen = RestPixel;
749 }
750 RestPixel -= BlockLen;
751 ExtraPos = Pos + (BlockLen / 4);
752 }
753 BlockTypeByte <<= 2;
754 BlockTypeLen -= 1;
755 }
756 if (BlockLen > 0) {
757 if ((BlockLen%4) == 0) {
758 BlockByte = Compressed[Pos];
759 Pos++;
760 }
761 if (BlockType == 1) { //inter Block
762 Integrator = Decompressed[Idx];
763 }
764 switch (BlockByte & 0xC0) {
765 case 0x03<<6:
766 Integrator += Compressed[ExtraPos];
767 ExtraPos++;
768 break;
769 case 0x02<<6:
770 Integrator += BlockCode;
771 break;
772 case 0x00:
773 Integrator -= BlockCode;
774 break;
775 }
776 Decompressed[Idx] = Integrator;
777 BlockByte <<= 2;
778 BlockLen -= 1;
779 }
780 }
781 *StartPos = ExtraPos;
782 *BlockTypeStartPos = BlockTypePos;
783 return Idx;
784 }
785
786
787 /*
788 * usbvision_parse_compress()
789 *
790 * Parse compressed frame from the scratch buffer, put
791 * decoded RGB value into the current frame buffer and add the written
792 * number of bytes (RGB) to the *pcopylen.
793 *
794 */
795 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
796 long *pcopylen)
797 {
798 #define USBVISION_STRIP_MAGIC 0x5A
799 #define USBVISION_STRIP_LEN_MAX 400
800 #define USBVISION_STRIP_HEADER_LEN 3
801
802 struct usbvision_frame *frame;
803 unsigned char *f,*u = NULL ,*v = NULL;
804 unsigned char StripData[USBVISION_STRIP_LEN_MAX];
805 unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
806 int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
807 int clipmask_index, bytes_per_pixel, rc;
808 int imageSize;
809 unsigned char rv, gv, bv;
810 static unsigned char *Y, *U, *V;
811
812 frame = usbvision->curFrame;
813 imageSize = frame->frmwidth * frame->frmheight;
814 if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
815 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) { // this is a planar format
816 //... v4l2_linesize not used here.
817 f = frame->data + (frame->width * frame->curline);
818 } else
819 f = frame->data + (frame->v4l2_linesize * frame->curline);
820
821 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
822 // get base of u and b planes add halfoffset
823
824 u = frame->data
825 + imageSize
826 + (frame->frmwidth >>1) * frame->curline ;
827 v = u + (imageSize >>1 );
828
829 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
830
831 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
832 u = v + (imageSize >>2) ;
833 }
834
835 if (frame->curline == 0) {
836 usbvision_adjust_compression(usbvision);
837 }
838
839 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
840 return ParseState_Out;
841 }
842
843 //get strip header without changing the scratch_read_ptr
844 scratch_set_extra_ptr(usbvision, &StripPtr, 0);
845 scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
846 USBVISION_STRIP_HEADER_LEN);
847
848 if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
849 // wrong strip magic
850 usbvision->stripMagicErrors++;
851 return ParseState_NextFrame;
852 }
853
854 if (frame->curline != (int)StripHeader[2]) {
855 //line number missmatch error
856 usbvision->stripLineNumberErrors++;
857 }
858
859 StripLen = 2 * (unsigned int)StripHeader[1];
860 if (StripLen > USBVISION_STRIP_LEN_MAX) {
861 // strip overrun
862 // I think this never happens
863 usbvision_request_intra(usbvision);
864 }
865
866 if (scratch_len(usbvision) < StripLen) {
867 //there is not enough data for the strip
868 return ParseState_Out;
869 }
870
871 if (usbvision->IntraFrameBuffer) {
872 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
873 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
874 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
875 }
876 else {
877 return ParseState_NextFrame;
878 }
879
880 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
881 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
882
883 scratch_get(usbvision, StripData, StripLen);
884
885 IdxEnd = frame->frmwidth;
886 BlockTypePos = USBVISION_STRIP_HEADER_LEN;
887 StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
888 BlockPos = StartBlockPos;
889
890 usbvision->BlockPos = BlockPos;
891
892 if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
893 //return ParseState_Continue;
894 }
895 if (StripLen > usbvision->maxStripLen) {
896 usbvision->maxStripLen = StripLen;
897 }
898
899 if (frame->curline%2) {
900 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
901 //return ParseState_Continue;
902 }
903 }
904 else {
905 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
906 //return ParseState_Continue;
907 }
908 }
909
910 if (BlockPos > usbvision->comprBlockPos) {
911 usbvision->comprBlockPos = BlockPos;
912 }
913 if (BlockPos > StripLen) {
914 usbvision->stripLenErrors++;
915 }
916
917 for (Idx = 0; Idx < IdxEnd; Idx++) {
918 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
919 *f++ = Y[Idx];
920 *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
921 }
922 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
923 *f++ = Y[Idx];
924 if ( Idx & 0x01)
925 *u++ = U[Idx>>1] ;
926 else
927 *v++ = V[Idx>>1];
928 }
929 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
930 *f++ = Y [Idx];
931 if ( !(( Idx & 0x01 ) | ( frame->curline & 0x01 )) ){
932
933 /* only need do this for 1 in 4 pixels */
934 /* intraframe buffer is YUV420 format */
935
936 *u++ = U[Idx >>1];
937 *v++ = V[Idx >>1];
938 }
939
940 }
941 else {
942 YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
943 switch (frame->v4l2_format.format) {
944 case V4L2_PIX_FMT_GREY:
945 *f++ = Y[Idx];
946 break;
947 case V4L2_PIX_FMT_RGB555:
948 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
949 *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
950 break;
951 case V4L2_PIX_FMT_RGB565:
952 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
953 *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv);
954 break;
955 case V4L2_PIX_FMT_RGB24:
956 *f++ = bv;
957 *f++ = gv;
958 *f++ = rv;
959 break;
960 case V4L2_PIX_FMT_RGB32:
961 *f++ = bv;
962 *f++ = gv;
963 *f++ = rv;
964 f++;
965 break;
966 }
967 }
968 clipmask_index++;
969 }
970 /* Deal with non-integer no. of bytes for YUV420P */
971 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
972 *pcopylen += frame->v4l2_linesize;
973 else
974 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
975
976 frame->curline += 1;
977
978 if (frame->curline >= frame->frmheight) {
979 return ParseState_NextFrame;
980 }
981 else {
982 return ParseState_Continue;
983 }
984
985 }
986
987
988 /*
989 * usbvision_parse_lines_420()
990 *
991 * Parse two lines from the scratch buffer, put
992 * decoded RGB value into the current frame buffer and add the written
993 * number of bytes (RGB) to the *pcopylen.
994 *
995 */
996 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
997 long *pcopylen)
998 {
999 struct usbvision_frame *frame;
1000 unsigned char *f_even = NULL, *f_odd = NULL;
1001 unsigned int pixel_per_line, block;
1002 int pixel, block_split;
1003 int y_ptr, u_ptr, v_ptr, y_odd_offset;
1004 const int y_block_size = 128;
1005 const int uv_block_size = 64;
1006 const int sub_block_size = 32;
1007 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
1008 const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1009 unsigned char y[2], u, v; /* YUV components */
1010 int y_, u_, v_, vb, uvg, ur;
1011 int r_, g_, b_; /* RGB components */
1012 unsigned char g;
1013 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1014 int clipmask_add, stretch_bytes;
1015
1016 frame = usbvision->curFrame;
1017 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1018 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1019
1020 /* Make sure there's enough data for the entire line */
1021 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1022 /* I need two lines to decode the color */
1023 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1024 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1025 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1026 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
1027 clipmask_add = usbvision->stretch_width;
1028 pixel_per_line = frame->isocHeader.frameWidth;
1029
1030 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1031 //printk(KERN_DEBUG "out of data, need %d\n", len);
1032 return ParseState_Out;
1033 }
1034
1035 if ((frame->curline + 1) >= frame->frmheight) {
1036 return ParseState_NextFrame;
1037 }
1038
1039 block_split = (pixel_per_line%y_block_size) ? 1 : 0; //are some blocks splitted into different lines?
1040
1041 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1042 + block_split * uv_block_size;
1043
1044 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1045 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1046 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1047 + (4 - block_split) * sub_block_size);
1048
1049 for (block = 0; block < (pixel_per_line / sub_block_size);
1050 block++) {
1051
1052
1053 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1054 scratch_get(usbvision, &y[0], 2);
1055 scratch_get_extra(usbvision, &u, &u_ptr, 1);
1056 scratch_get_extra(usbvision, &v, &v_ptr, 1);
1057
1058 //I don't use the YUV_TO_RGB macro for better performance
1059 v_ = v - 128;
1060 u_ = u - 128;
1061 vb = 132252 * v_;
1062 uvg= -53281 * u_ - 25625 * v_;
1063 ur = 104595 * u_;
1064
1065 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1066 *f_even++ = y[0];
1067 *f_even++ = v;
1068 }
1069 else {
1070 y_ = 76284 * (y[0] - 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_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1080 *f_even++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1081 break;
1082 case V4L2_PIX_FMT_RGB24:
1083 *f_even++ = LIMIT_RGB(b_);
1084 *f_even++ = LIMIT_RGB(g_);
1085 *f_even++ = LIMIT_RGB(r_);
1086 break;
1087 case V4L2_PIX_FMT_RGB32:
1088 *f_even++ = LIMIT_RGB(b_);
1089 *f_even++ = LIMIT_RGB(g_);
1090 *f_even++ = LIMIT_RGB(r_);
1091 f_even++;
1092 break;
1093 case V4L2_PIX_FMT_RGB555:
1094 g = LIMIT_RGB(g_);
1095 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1096 *f_even++ = (0x03 & ( g >> 6)) |
1097 (0x7C & (LIMIT_RGB(r_) >> 1));
1098 break;
1099 }
1100 }
1101 clipmask_even_index += clipmask_add;
1102 f_even += stretch_bytes;
1103
1104 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1105 *f_even++ = y[1];
1106 *f_even++ = u;
1107 }
1108 else {
1109 y_ = 76284 * (y[1] - 16);
1110
1111 b_ = (y_ + vb) >> 16;
1112 g_ = (y_ + uvg)>> 16;
1113 r_ = (y_ + ur) >> 16;
1114
1115 switch (frame->v4l2_format.format) {
1116 case V4L2_PIX_FMT_RGB565:
1117 g = LIMIT_RGB(g_);
1118 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1119 *f_even++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1120 break;
1121 case V4L2_PIX_FMT_RGB24:
1122 *f_even++ = LIMIT_RGB(b_);
1123 *f_even++ = LIMIT_RGB(g_);
1124 *f_even++ = LIMIT_RGB(r_);
1125 break;
1126 case V4L2_PIX_FMT_RGB32:
1127 *f_even++ = LIMIT_RGB(b_);
1128 *f_even++ = LIMIT_RGB(g_);
1129 *f_even++ = LIMIT_RGB(r_);
1130 f_even++;
1131 break;
1132 case V4L2_PIX_FMT_RGB555:
1133 g = LIMIT_RGB(g_);
1134 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1135 *f_even++ = (0x03 & ( g >> 6)) |
1136 (0x7C & (LIMIT_RGB(r_) >> 1));
1137 break;
1138 }
1139 }
1140 clipmask_even_index += clipmask_add;
1141 f_even += stretch_bytes;
1142
1143 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1144
1145 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1146 *f_odd++ = y[0];
1147 *f_odd++ = v;
1148 }
1149 else {
1150 y_ = 76284 * (y[0] - 16);
1151
1152 b_ = (y_ + vb) >> 16;
1153 g_ = (y_ + uvg)>> 16;
1154 r_ = (y_ + ur) >> 16;
1155
1156 switch (frame->v4l2_format.format) {
1157 case V4L2_PIX_FMT_RGB565:
1158 g = LIMIT_RGB(g_);
1159 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1160 *f_odd++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1161 break;
1162 case V4L2_PIX_FMT_RGB24:
1163 *f_odd++ = LIMIT_RGB(b_);
1164 *f_odd++ = LIMIT_RGB(g_);
1165 *f_odd++ = LIMIT_RGB(r_);
1166 break;
1167 case V4L2_PIX_FMT_RGB32:
1168 *f_odd++ = LIMIT_RGB(b_);
1169 *f_odd++ = LIMIT_RGB(g_);
1170 *f_odd++ = LIMIT_RGB(r_);
1171 f_odd++;
1172 break;
1173 case V4L2_PIX_FMT_RGB555:
1174 g = LIMIT_RGB(g_);
1175 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1176 *f_odd++ = (0x03 & ( g >> 6)) |
1177 (0x7C & (LIMIT_RGB(r_) >> 1));
1178 break;
1179 }
1180 }
1181 clipmask_odd_index += clipmask_add;
1182 f_odd += stretch_bytes;
1183
1184 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1185 *f_odd++ = y[1];
1186 *f_odd++ = u;
1187 }
1188 else {
1189 y_ = 76284 * (y[1] - 16);
1190
1191 b_ = (y_ + vb) >> 16;
1192 g_ = (y_ + uvg)>> 16;
1193 r_ = (y_ + ur) >> 16;
1194
1195 switch (frame->v4l2_format.format) {
1196 case V4L2_PIX_FMT_RGB565:
1197 g = LIMIT_RGB(g_);
1198 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1199 *f_odd++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1200 break;
1201 case V4L2_PIX_FMT_RGB24:
1202 *f_odd++ = LIMIT_RGB(b_);
1203 *f_odd++ = LIMIT_RGB(g_);
1204 *f_odd++ = LIMIT_RGB(r_);
1205 break;
1206 case V4L2_PIX_FMT_RGB32:
1207 *f_odd++ = LIMIT_RGB(b_);
1208 *f_odd++ = LIMIT_RGB(g_);
1209 *f_odd++ = LIMIT_RGB(r_);
1210 f_odd++;
1211 break;
1212 case V4L2_PIX_FMT_RGB555:
1213 g = LIMIT_RGB(g_);
1214 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1215 *f_odd++ = (0x03 & ( g >> 6)) |
1216 (0x7C & (LIMIT_RGB(r_) >> 1));
1217 break;
1218 }
1219 }
1220 clipmask_odd_index += clipmask_add;
1221 f_odd += stretch_bytes;
1222 }
1223
1224 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1225 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1226 * sub_block_size);
1227 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1228 * sub_block_size);
1229 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1230 * sub_block_size);
1231 }
1232
1233 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1234 + block_split * sub_block_size);
1235
1236 frame->curline += 2 * usbvision->stretch_height;
1237 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1238
1239 if (frame->curline >= frame->frmheight)
1240 return ParseState_NextFrame;
1241 else
1242 return ParseState_Continue;
1243 }
1244
1245 /*
1246 * usbvision_parse_data()
1247 *
1248 * Generic routine to parse the scratch buffer. It employs either
1249 * usbvision_find_header() or usbvision_parse_lines() to do most
1250 * of work.
1251 *
1252 */
1253 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1254 {
1255 struct usbvision_frame *frame;
1256 enum ParseState newstate;
1257 long copylen = 0;
1258 unsigned long lock_flags;
1259
1260 frame = usbvision->curFrame;
1261
1262 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1263
1264 while (1) {
1265
1266 newstate = ParseState_Out;
1267 if (scratch_len(usbvision)) {
1268 if (frame->scanstate == ScanState_Scanning) {
1269 newstate = usbvision_find_header(usbvision);
1270 }
1271 else if (frame->scanstate == ScanState_Lines) {
1272 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1273 newstate = usbvision_parse_lines_420(usbvision, &copylen);
1274 }
1275 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1276 newstate = usbvision_parse_lines_422(usbvision, &copylen);
1277 }
1278 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1279 newstate = usbvision_parse_compress(usbvision, &copylen);
1280 }
1281
1282 }
1283 }
1284 if (newstate == ParseState_Continue) {
1285 continue;
1286 }
1287 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1288 break;
1289 }
1290 else {
1291 return; /* ParseState_EndParse */
1292 }
1293 }
1294
1295 if (newstate == ParseState_NextFrame) {
1296 frame->grabstate = FrameState_Done;
1297 do_gettimeofday(&(frame->timestamp));
1298 frame->sequence = usbvision->frame_num;
1299
1300 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1301 list_move_tail(&(frame->frame), &usbvision->outqueue);
1302 usbvision->curFrame = NULL;
1303 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1304
1305 usbvision->frame_num++;
1306
1307 /* This will cause the process to request another frame. */
1308 if (waitqueue_active(&usbvision->wait_frame)) {
1309 PDEBUG(DBG_PARSE, "Wake up !");
1310 wake_up_interruptible(&usbvision->wait_frame);
1311 }
1312 }
1313 else
1314 frame->grabstate = FrameState_Grabbing;
1315
1316
1317 /* Update the frame's uncompressed length. */
1318 frame->scanlength += copylen;
1319 }
1320
1321
1322 /*
1323 * Make all of the blocks of data contiguous
1324 */
1325 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1326 struct urb *urb)
1327 {
1328 unsigned char *packet_data;
1329 int i, totlen = 0;
1330
1331 for (i = 0; i < urb->number_of_packets; i++) {
1332 int packet_len = urb->iso_frame_desc[i].actual_length;
1333 int packet_stat = urb->iso_frame_desc[i].status;
1334
1335 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1336
1337 /* Detect and ignore errored packets */
1338 if (packet_stat) { // packet_stat != 0 ?????????????
1339 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1340 usbvision->isocErrCount++;
1341 continue;
1342 }
1343
1344 /* Detect and ignore empty packets */
1345 if (packet_len < 0) {
1346 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1347 usbvision->isocSkipCount++;
1348 continue;
1349 }
1350 else if (packet_len == 0) { /* Frame end ????? */
1351 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1352 usbvision->isocstate=IsocState_NoFrame;
1353 usbvision->isocSkipCount++;
1354 continue;
1355 }
1356 else if (packet_len > usbvision->isocPacketSize) {
1357 PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1358 usbvision->isocSkipCount++;
1359 continue;
1360 }
1361
1362 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1363
1364 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1365 usbvision->isocstate=IsocState_InFrame;
1366 scratch_mark_header(usbvision);
1367 usbvision_measure_bandwidth(usbvision);
1368 PDEBUG(DBG_ISOC, "packet with header");
1369 }
1370
1371 /*
1372 * If usbvision continues to feed us with data but there is no
1373 * consumption (if, for example, V4L client fell asleep) we
1374 * may overflow the buffer. We have to move old data over to
1375 * free room for new data. This is bad for old data. If we
1376 * just drop new data then it's bad for new data... choose
1377 * your favorite evil here.
1378 */
1379 if (scratch_free(usbvision) < packet_len) {
1380
1381 usbvision->scratch_ovf_count++;
1382 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1383 scratch_len(usbvision), packet_len);
1384 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1385 }
1386
1387 /* Now we know that there is enough room in scratch buffer */
1388 scratch_put(usbvision, packet_data, packet_len);
1389 totlen += packet_len;
1390 usbvision->isocDataCount += packet_len;
1391 usbvision->isocPacketCount++;
1392 }
1393 #if ENABLE_HEXDUMP
1394 if (totlen > 0) {
1395 static int foo = 0;
1396 if (foo < 1) {
1397 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1398 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1399 ++foo;
1400 }
1401 }
1402 #endif
1403 return totlen;
1404 }
1405
1406 static void usbvision_isocIrq(struct urb *urb)
1407 {
1408 int errCode = 0;
1409 int len;
1410 struct usb_usbvision *usbvision = urb->context;
1411 int i;
1412 unsigned long startTime = jiffies;
1413 struct usbvision_frame **f;
1414
1415 /* We don't want to do anything if we are about to be removed! */
1416 if (!USBVISION_IS_OPERATIONAL(usbvision))
1417 return;
1418
1419 f = &usbvision->curFrame;
1420
1421 /* Manage streaming interruption */
1422 if (usbvision->streaming == Stream_Interrupt) {
1423 usbvision->streaming = Stream_Idle;
1424 if ((*f)) {
1425 (*f)->grabstate = FrameState_Ready;
1426 (*f)->scanstate = ScanState_Scanning;
1427 }
1428 PDEBUG(DBG_IRQ, "stream interrupted");
1429 wake_up_interruptible(&usbvision->wait_stream);
1430 }
1431
1432 /* Copy the data received into our scratch buffer */
1433 len = usbvision_compress_isochronous(usbvision, urb);
1434
1435 usbvision->isocUrbCount++;
1436 usbvision->urb_length = len;
1437
1438 if (usbvision->streaming == Stream_On) {
1439
1440 /* If we collected enough data let's parse! */
1441 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH) { /* 12 == header_length */
1442 /*If we don't have a frame we're current working on, complain */
1443 if(!list_empty(&(usbvision->inqueue))) {
1444 if (!(*f)) {
1445 (*f) = list_entry(usbvision->inqueue.next,struct usbvision_frame, frame);
1446 }
1447 usbvision_parse_data(usbvision);
1448 }
1449 else {
1450 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1451 scratch_reset(usbvision);
1452 }
1453 }
1454 }
1455 else {
1456 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1457 scratch_reset(usbvision);
1458 }
1459
1460 usbvision->timeInIrq += jiffies - startTime;
1461
1462 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1463 urb->iso_frame_desc[i].status = 0;
1464 urb->iso_frame_desc[i].actual_length = 0;
1465 }
1466
1467 urb->status = 0;
1468 urb->dev = usbvision->dev;
1469 errCode = usb_submit_urb (urb, GFP_ATOMIC);
1470
1471 /* Disable this warning. By design of the driver. */
1472 // if(errCode) {
1473 // err("%s: usb_submit_urb failed: error %d", __FUNCTION__, errCode);
1474 // }
1475
1476 return;
1477 }
1478
1479 /*************************************/
1480 /* Low level usbvision access functions */
1481 /*************************************/
1482
1483 /*
1484 * usbvision_read_reg()
1485 *
1486 * return < 0 -> Error
1487 * >= 0 -> Data
1488 */
1489
1490 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1491 {
1492 int errCode = 0;
1493 unsigned char buffer[1];
1494
1495 if (!USBVISION_IS_OPERATIONAL(usbvision))
1496 return -1;
1497
1498 errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1499 USBVISION_OP_CODE,
1500 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1501 0, (__u16) reg, buffer, 1, HZ);
1502
1503 if (errCode < 0) {
1504 err("%s: failed: error %d", __FUNCTION__, errCode);
1505 return errCode;
1506 }
1507 return buffer[0];
1508 }
1509
1510 /*
1511 * usbvision_write_reg()
1512 *
1513 * return 1 -> Reg written
1514 * 0 -> usbvision is not yet ready
1515 * -1 -> Something went wrong
1516 */
1517
1518 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1519 unsigned char value)
1520 {
1521 int errCode = 0;
1522
1523 if (!USBVISION_IS_OPERATIONAL(usbvision))
1524 return 0;
1525
1526 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1527 USBVISION_OP_CODE,
1528 USB_DIR_OUT | USB_TYPE_VENDOR |
1529 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1530
1531 if (errCode < 0) {
1532 err("%s: failed: error %d", __FUNCTION__, errCode);
1533 }
1534 return errCode;
1535 }
1536
1537
1538 static void usbvision_ctrlUrb_complete(struct urb *urb)
1539 {
1540 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1541
1542 PDEBUG(DBG_IRQ, "");
1543 usbvision->ctrlUrbBusy = 0;
1544 if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1545 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1546 }
1547 }
1548
1549
1550 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1551 unsigned char *data, int len)
1552 {
1553 int errCode = 0;
1554
1555 PDEBUG(DBG_IRQ, "");
1556 if (len > 8) {
1557 return -EFAULT;
1558 }
1559 // down(&usbvision->ctrlUrbLock);
1560 if (usbvision->ctrlUrbBusy) {
1561 // up(&usbvision->ctrlUrbLock);
1562 return -EBUSY;
1563 }
1564 usbvision->ctrlUrbBusy = 1;
1565 // up(&usbvision->ctrlUrbLock);
1566
1567 usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1568 usbvision->ctrlUrbSetup.bRequest = USBVISION_OP_CODE;
1569 usbvision->ctrlUrbSetup.wValue = 0;
1570 usbvision->ctrlUrbSetup.wIndex = cpu_to_le16(address);
1571 usbvision->ctrlUrbSetup.wLength = cpu_to_le16(len);
1572 usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1573 usb_sndctrlpipe(usbvision->dev, 1),
1574 (unsigned char *)&usbvision->ctrlUrbSetup,
1575 (void *)usbvision->ctrlUrbBuffer, len,
1576 usbvision_ctrlUrb_complete,
1577 (void *)usbvision);
1578
1579 memcpy(usbvision->ctrlUrbBuffer, data, len);
1580
1581 errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1582 if (errCode < 0) {
1583 // error in usb_submit_urb()
1584 usbvision->ctrlUrbBusy = 0;
1585 }
1586 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1587 return errCode;
1588 }
1589
1590
1591 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1592 {
1593 int errCode = 0;
1594
1595 usbvision->lastIsocFrameNum = -1;
1596 usbvision->isocDataCount = 0;
1597 usbvision->isocPacketCount = 0;
1598 usbvision->isocSkipCount = 0;
1599 usbvision->comprLevel = 50;
1600 usbvision->lastComprLevel = -1;
1601 usbvision->isocUrbCount = 0;
1602 usbvision->requestIntra = 1;
1603 usbvision->isocMeasureBandwidthCount = 0;
1604
1605 return errCode;
1606 }
1607
1608 /* this function measures the used bandwidth since last call
1609 * return: 0 : no error
1610 * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1611 */
1612 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1613 {
1614 int errCode = 0;
1615
1616 if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1617 usbvision->isocMeasureBandwidthCount++;
1618 return errCode;
1619 }
1620 if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1621 usbvision->usedBandwidth = usbvision->isocDataCount /
1622 (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1623 100 / usbvision->isocPacketSize;
1624 }
1625 usbvision->isocMeasureBandwidthCount = 0;
1626 usbvision->isocDataCount = 0;
1627 usbvision->isocPacketCount = 0;
1628 usbvision->isocSkipCount = 0;
1629 return errCode;
1630 }
1631
1632 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1633 {
1634 int errCode = 0;
1635 unsigned char buffer[6];
1636
1637 PDEBUG(DBG_IRQ, "");
1638 if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1639 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1640 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1641 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1642 int distorsion;
1643 if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1644 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM Threshold 1
1645 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM Threshold 2
1646 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1647 buffer[2] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (inter)
1648 buffer[3] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (intra)
1649 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1650 buffer[4] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (inter)
1651 buffer[5] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (intra)
1652 }
1653 else { //BRIDGE_NT1003
1654 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM threshold 1
1655 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM threshold 2
1656 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1657 buffer[2] = (unsigned char)(distorsion & 0xFF); // distorsion threshold bit0-7
1658 buffer[3] = 0; //(unsigned char)((distorsion >> 8) & 0x0F); // distorsion threshold bit 8-11
1659 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1660 buffer[4] = (unsigned char)(distorsion & 0xFF); // maximum distorsion bit0-7
1661 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01); // maximum distorsion bit 8
1662 }
1663 errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1664 if (errCode == 0){
1665 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1666 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1667 usbvision->lastComprLevel = usbvision->comprLevel;
1668 }
1669 }
1670 }
1671 return errCode;
1672 }
1673
1674 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1675 {
1676 int errCode = 0;
1677 unsigned char buffer[1];
1678
1679 PDEBUG(DBG_IRQ, "");
1680 usbvision->requestIntra = 1;
1681 buffer[0] = 1;
1682 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1683 return errCode;
1684 }
1685
1686 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1687 {
1688 int errCode = 0;
1689 unsigned char buffer[1];
1690
1691 PDEBUG(DBG_IRQ, "");
1692 usbvision->requestIntra = 0;
1693 buffer[0] = 0;
1694 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1695 return errCode;
1696 }
1697
1698 /*******************************
1699 * usbvision utility functions
1700 *******************************/
1701
1702 int usbvision_power_off(struct usb_usbvision *usbvision)
1703 {
1704 int errCode = 0;
1705
1706 PDEBUG(DBG_FUNC, "");
1707
1708 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1709 if (errCode == 1) {
1710 usbvision->power = 0;
1711 }
1712 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1713 return errCode;
1714 }
1715
1716 /*
1717 * usbvision_set_video_format()
1718 *
1719 */
1720 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1721 {
1722 static const char proc[] = "usbvision_set_video_format";
1723 int rc;
1724 unsigned char value[2];
1725
1726 if (!USBVISION_IS_OPERATIONAL(usbvision))
1727 return 0;
1728
1729 PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1730
1731 if ((format != ISOC_MODE_YUV422)
1732 && (format != ISOC_MODE_YUV420)
1733 && (format != ISOC_MODE_COMPRESS)) {
1734 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1735 format);
1736 format = ISOC_MODE_YUV420;
1737 }
1738 value[0] = 0x0A; //TODO: See the effect of the filter
1739 value[1] = format;
1740 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1741 USBVISION_OP_CODE,
1742 USB_DIR_OUT | USB_TYPE_VENDOR |
1743 USB_RECIP_ENDPOINT, 0,
1744 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1745
1746 if (rc < 0) {
1747 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1748 "reconnect or reload driver.\n", proc, rc);
1749 }
1750 usbvision->isocMode = format;
1751 return rc;
1752 }
1753
1754 /*
1755 * usbvision_set_output()
1756 *
1757 */
1758
1759 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1760 int height)
1761 {
1762 int errCode = 0;
1763 int UsbWidth, UsbHeight;
1764 unsigned int frameRate=0, frameDrop=0;
1765 unsigned char value[4];
1766
1767 if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1768 return 0;
1769 }
1770
1771 if (width > MAX_USB_WIDTH) {
1772 UsbWidth = width / 2;
1773 usbvision->stretch_width = 2;
1774 }
1775 else {
1776 UsbWidth = width;
1777 usbvision->stretch_width = 1;
1778 }
1779
1780 if (height > MAX_USB_HEIGHT) {
1781 UsbHeight = height / 2;
1782 usbvision->stretch_height = 2;
1783 }
1784 else {
1785 UsbHeight = height;
1786 usbvision->stretch_height = 1;
1787 }
1788
1789 RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1790 UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1791 RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1792 UsbHeight &= ~(1);
1793
1794 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1795 UsbWidth, UsbHeight, width, height,
1796 usbvision->stretch_width, usbvision->stretch_height);
1797
1798 /* I'll not rewrite the same values */
1799 if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1800 value[0] = UsbWidth & 0xff; //LSB
1801 value[1] = (UsbWidth >> 8) & 0x03; //MSB
1802 value[2] = UsbHeight & 0xff; //LSB
1803 value[3] = (UsbHeight >> 8) & 0x03; //MSB
1804
1805 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1806 USBVISION_OP_CODE,
1807 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1808 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1809
1810 if (errCode < 0) {
1811 err("%s failed: error %d", __FUNCTION__, errCode);
1812 return errCode;
1813 }
1814 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1815 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1816 }
1817
1818 if (usbvision->isocMode == ISOC_MODE_YUV422) {
1819 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1820 }
1821 else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1822 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1823 }
1824 else {
1825 frameRate = FRAMERATE_MAX;
1826 }
1827
1828 if (usbvision->tvnorm->id & V4L2_STD_625_50) {
1829 frameDrop = frameRate * 32 / 25 - 1;
1830 }
1831 else if (usbvision->tvnorm->id & V4L2_STD_525_60) {
1832 frameDrop = frameRate * 32 / 30 - 1;
1833 }
1834
1835 RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1836
1837 PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1838
1839 frameDrop = FRAMERATE_MAX; // We can allow the maximum here, because dropping is controlled
1840
1841 /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1842 => frameSkip = 4;
1843 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1844
1845 frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1846 => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1847 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1848 */
1849 errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1850 return errCode;
1851 }
1852
1853
1854 /*
1855 * usbvision_frames_alloc
1856 * allocate the maximum frames this driver can manage
1857 */
1858 int usbvision_frames_alloc(struct usb_usbvision *usbvision)
1859 {
1860 int i;
1861
1862 /* Allocate memory for the frame buffers */
1863 usbvision->max_frame_size = MAX_FRAME_SIZE;
1864 usbvision->fbuf_size = USBVISION_NUMFRAMES * usbvision->max_frame_size;
1865 usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size);
1866
1867 if(usbvision->fbuf == NULL) {
1868 err("%s: unable to allocate %d bytes for fbuf ",
1869 __FUNCTION__, usbvision->fbuf_size);
1870 return -ENOMEM;
1871 }
1872 spin_lock_init(&usbvision->queue_lock);
1873 init_waitqueue_head(&usbvision->wait_frame);
1874 init_waitqueue_head(&usbvision->wait_stream);
1875
1876 /* Allocate all buffers */
1877 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1878 usbvision->frame[i].index = i;
1879 usbvision->frame[i].grabstate = FrameState_Unused;
1880 usbvision->frame[i].data = usbvision->fbuf +
1881 i * usbvision->max_frame_size;
1882 /*
1883 * Set default sizes for read operation.
1884 */
1885 usbvision->stretch_width = 1;
1886 usbvision->stretch_height = 1;
1887 usbvision->frame[i].width = usbvision->curwidth;
1888 usbvision->frame[i].height = usbvision->curheight;
1889 usbvision->frame[i].bytes_read = 0;
1890 }
1891 return 0;
1892 }
1893
1894 /*
1895 * usbvision_frames_free
1896 * frees memory allocated for the frames
1897 */
1898 void usbvision_frames_free(struct usb_usbvision *usbvision)
1899 {
1900 /* Have to free all that memory */
1901 if (usbvision->fbuf != NULL) {
1902 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1903 usbvision->fbuf = NULL;
1904 }
1905 }
1906 /*
1907 * usbvision_empty_framequeues()
1908 * prepare queues for incoming and outgoing frames
1909 */
1910 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1911 {
1912 u32 i;
1913
1914 INIT_LIST_HEAD(&(usbvision->inqueue));
1915 INIT_LIST_HEAD(&(usbvision->outqueue));
1916
1917 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1918 usbvision->frame[i].grabstate = FrameState_Unused;
1919 usbvision->frame[i].bytes_read = 0;
1920 }
1921 }
1922
1923 /*
1924 * usbvision_stream_interrupt()
1925 * stops streaming
1926 */
1927 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1928 {
1929 int ret = 0;
1930
1931 /* stop reading from the device */
1932
1933 usbvision->streaming = Stream_Interrupt;
1934 ret = wait_event_timeout(usbvision->wait_stream,
1935 (usbvision->streaming == Stream_Idle),
1936 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1937 return ret;
1938 }
1939
1940 /*
1941 * usbvision_set_compress_params()
1942 *
1943 */
1944
1945 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1946 {
1947 static const char proc[] = "usbvision_set_compresion_params: ";
1948 int rc;
1949 unsigned char value[6];
1950
1951 value[0] = 0x0F; // Intra-Compression cycle
1952 value[1] = 0x01; // Reg.45 one line per strip
1953 value[2] = 0x00; // Reg.46 Force intra mode on all new frames
1954 value[3] = 0x00; // Reg.47 FORCE_UP <- 0 normal operation (not force)
1955 value[4] = 0xA2; // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
1956 value[5] = 0x00; // Reg.49 DVI_YUV This has nothing to do with compression
1957
1958 //catched values for NT1004
1959 // value[0] = 0xFF; // Never apply intra mode automatically
1960 // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
1961 // value[2] = 0x01; // Force intra mode on all new frames
1962 // value[3] = 0x00; // Strip size 400 Bytes; do not force up
1963 // value[4] = 0xA2; //
1964 if (!USBVISION_IS_OPERATIONAL(usbvision))
1965 return 0;
1966
1967 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1968 USBVISION_OP_CODE,
1969 USB_DIR_OUT | USB_TYPE_VENDOR |
1970 USB_RECIP_ENDPOINT, 0,
1971 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1972
1973 if (rc < 0) {
1974 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1975 "reconnect or reload driver.\n", proc, rc);
1976 return rc;
1977 }
1978
1979 if (usbvision->bridgeType == BRIDGE_NT1004) {
1980 value[0] = 20; // PCM Threshold 1
1981 value[1] = 12; // PCM Threshold 2
1982 value[2] = 255; // Distorsion Threshold inter
1983 value[3] = 255; // Distorsion Threshold intra
1984 value[4] = 43; // Max Distorsion inter
1985 value[5] = 43; // Max Distorsion intra
1986 }
1987 else {
1988 value[0] = 20; // PCM Threshold 1
1989 value[1] = 12; // PCM Threshold 2
1990 value[2] = 255; // Distorsion Threshold d7-d0
1991 value[3] = 0; // Distorsion Threshold d11-d8
1992 value[4] = 43; // Max Distorsion d7-d0
1993 value[5] = 0; // Max Distorsion d8
1994 }
1995
1996 if (!USBVISION_IS_OPERATIONAL(usbvision))
1997 return 0;
1998
1999 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2000 USBVISION_OP_CODE,
2001 USB_DIR_OUT | USB_TYPE_VENDOR |
2002 USB_RECIP_ENDPOINT, 0,
2003 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2004
2005 if (rc < 0) {
2006 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2007 "reconnect or reload driver.\n", proc, rc);
2008 return rc;
2009 }
2010
2011
2012 return rc;
2013 }
2014
2015
2016 /*
2017 * usbvision_set_input()
2018 *
2019 * Set the input (saa711x, ...) size x y and other misc input params
2020 * I've no idea if this parameters are right
2021 *
2022 */
2023 int usbvision_set_input(struct usb_usbvision *usbvision)
2024 {
2025 static const char proc[] = "usbvision_set_input: ";
2026 int rc;
2027 unsigned char value[8];
2028 unsigned char dvi_yuv_value;
2029
2030 if (!USBVISION_IS_OPERATIONAL(usbvision))
2031 return 0;
2032
2033 /* Set input format expected from decoder*/
2034 if (usbvision_device_data[usbvision->DevModel].Vin_Reg1 >= 0) {
2035 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1 & 0xff;
2036 } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2037 /* SAA7113 uses 8 bit output */
2038 value[0] = USBVISION_8_422_SYNC;
2039 } else {
2040 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2041 * as that is how saa7111 is configured */
2042 value[0] = USBVISION_16_422_SYNC;
2043 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2044 }
2045
2046 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2047 if (rc < 0) {
2048 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2049 "reconnect or reload driver.\n", proc, rc);
2050 return rc;
2051 }
2052
2053
2054 if (usbvision->tvnorm->id & V4L2_STD_PAL) {
2055 value[0] = 0xC0;
2056 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2057 value[2] = 0x20;
2058 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2059 value[4] = 0x60;
2060 value[5] = 0x00; //0x0060 -> 96 Input video h offset
2061 value[6] = 0x16;
2062 value[7] = 0x00; //0x0016 -> 22 Input video v offset
2063 } else if (usbvision->tvnorm->id & V4L2_STD_SECAM) {
2064 value[0] = 0xC0;
2065 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2066 value[2] = 0x20;
2067 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2068 value[4] = 0x01;
2069 value[5] = 0x00; //0x0001 -> 01 Input video h offset
2070 value[6] = 0x01;
2071 value[7] = 0x00; //0x0001 -> 01 Input video v offset
2072 } else { /* V4L2_STD_NTSC */
2073 value[0] = 0xD0;
2074 value[1] = 0x02; //0x02D0 -> 720 Input video line length
2075 value[2] = 0xF0;
2076 value[3] = 0x00; //0x00F0 -> 240 Input video number of lines
2077 value[4] = 0x50;
2078 value[5] = 0x00; //0x0050 -> 80 Input video h offset
2079 value[6] = 0x10;
2080 value[7] = 0x00; //0x0010 -> 16 Input video v offset
2081 }
2082
2083 if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2084 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2085 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2086 }
2087
2088 if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2089 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2090 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2091 }
2092
2093 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2094 USBVISION_OP_CODE, /* USBVISION specific code */
2095 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2096 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2097 if (rc < 0) {
2098 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2099 "reconnect or reload driver.\n", proc, rc);
2100 return rc;
2101 }
2102
2103
2104 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2105
2106 if(usbvision_device_data[usbvision->DevModel].Dvi_yuv >= 0){
2107 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv & 0xff;
2108 }
2109 else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2110 /* This changes as the fine sync control changes. Further investigation necessary */
2111 dvi_yuv_value = 0x06;
2112 }
2113
2114 return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2115 }
2116
2117
2118 /*
2119 * usbvision_set_dram_settings()
2120 *
2121 * Set the buffer address needed by the usbvision dram to operate
2122 * This values has been taken with usbsnoop.
2123 *
2124 */
2125
2126 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2127 {
2128 int rc;
2129 unsigned char value[8];
2130
2131 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2132 value[0] = 0x42;
2133 value[1] = 0x71;
2134 value[2] = 0xff;
2135 value[3] = 0x00;
2136 value[4] = 0x98;
2137 value[5] = 0xe0;
2138 value[6] = 0x71;
2139 value[7] = 0xff;
2140 // UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2141 // FDL: 0x00000-0x0E099 = 57498 Words
2142 // VDW: 0x0E3FF-0x3FFFF
2143 }
2144 else {
2145 value[0] = 0x42;
2146 value[1] = 0x00;
2147 value[2] = 0xff;
2148 value[3] = 0x00;
2149 value[4] = 0x00;
2150 value[5] = 0x00;
2151 value[6] = 0x00;
2152 value[7] = 0xff;
2153 }
2154 /* These are the values of the address of the video buffer,
2155 * they have to be loaded into the USBVISION_DRM_PRM1-8
2156 *
2157 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2158 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2159 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2160 * Only used in compressed mode
2161 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2162 * Only used in compressed mode
2163 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2164 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2165 */
2166
2167 if (!USBVISION_IS_OPERATIONAL(usbvision))
2168 return 0;
2169
2170 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2171 USBVISION_OP_CODE, /* USBVISION specific code */
2172 USB_DIR_OUT | USB_TYPE_VENDOR |
2173 USB_RECIP_ENDPOINT, 0,
2174 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2175
2176 if (rc < 0) {
2177 err("%sERROR=%d", __FUNCTION__, rc);
2178 return rc;
2179 }
2180
2181 /* Restart the video buffer logic */
2182 if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2183 USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2184 return rc;
2185 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2186
2187 return rc;
2188 }
2189
2190 /*
2191 * ()
2192 *
2193 * Power on the device, enables suspend-resume logic
2194 * & reset the isoc End-Point
2195 *
2196 */
2197
2198 int usbvision_power_on(struct usb_usbvision *usbvision)
2199 {
2200 int errCode = 0;
2201
2202 PDEBUG(DBG_FUNC, "");
2203
2204 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2205 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2206 USBVISION_SSPND_EN | USBVISION_RES2);
2207
2208 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2209 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2210 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2211 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2212 if (errCode == 1) {
2213 usbvision->power = 1;
2214 }
2215 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2216 return errCode;
2217 }
2218
2219
2220 /*
2221 * usbvision timer stuff
2222 */
2223
2224 // to call usbvision_power_off from task queue
2225 static void call_usbvision_power_off(struct work_struct *work)
2226 {
2227 struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2228
2229 PDEBUG(DBG_FUNC, "");
2230 down_interruptible(&usbvision->lock);
2231 if(usbvision->user == 0) {
2232 usbvision_i2c_usb_del_bus(&usbvision->i2c_adap);
2233
2234 usbvision_power_off(usbvision);
2235 usbvision->initialized = 0;
2236 }
2237 up(&usbvision->lock);
2238 }
2239
2240 static void usbvision_powerOffTimer(unsigned long data)
2241 {
2242 struct usb_usbvision *usbvision = (void *) data;
2243
2244 PDEBUG(DBG_FUNC, "");
2245 del_timer(&usbvision->powerOffTimer);
2246 INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2247 (void) schedule_work(&usbvision->powerOffWork);
2248
2249 }
2250
2251 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2252 {
2253 init_timer(&usbvision->powerOffTimer);
2254 usbvision->powerOffTimer.data = (long) usbvision;
2255 usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2256 }
2257
2258 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2259 {
2260 mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2261 }
2262
2263 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2264 {
2265 if (timer_pending(&usbvision->powerOffTimer)) {
2266 del_timer(&usbvision->powerOffTimer);
2267 }
2268 }
2269
2270 /*
2271 * usbvision_begin_streaming()
2272 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2273 * idea about the rest
2274 */
2275 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2276 {
2277 int errCode = 0;
2278
2279 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2280 usbvision_init_compression(usbvision);
2281 }
2282 errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2283 usbvision->Vin_Reg2_Preset);
2284 return errCode;
2285 }
2286
2287 /*
2288 * usbvision_restart_isoc()
2289 * Not sure yet if touching here PWR_REG make loose the config
2290 */
2291
2292 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2293 {
2294 int ret;
2295
2296 if (
2297 (ret =
2298 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2299 USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2300 return ret;
2301 if (
2302 (ret =
2303 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2304 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2305 USBVISION_RES2)) < 0)
2306 return ret;
2307 if (
2308 (ret =
2309 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2310 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2311 usbvision->Vin_Reg2_Preset)) < 0) return ret;
2312
2313 /* TODO: schedule timeout */
2314 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2315
2316 return 0;
2317 }
2318
2319 int usbvision_audio_off(struct usb_usbvision *usbvision)
2320 {
2321 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2322 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2323 return -1;
2324 }
2325 usbvision->AudioMute = 0;
2326 usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2327 return 0;
2328 }
2329
2330 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2331 {
2332 if (!usbvision->AudioMute) {
2333 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2334 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2335 return -1;
2336 }
2337 }
2338 usbvision->AudioChannel = AudioChannel;
2339 return 0;
2340 }
2341
2342 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2343 {
2344 usbvision_set_video_format(usbvision, format);
2345 usbvision_set_dram_settings(usbvision);
2346 usbvision_set_compress_params(usbvision);
2347 usbvision_set_input(usbvision);
2348 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2349 usbvision_restart_isoc(usbvision);
2350
2351 /* cosas del PCM */
2352 return USBVISION_IS_OPERATIONAL(usbvision);
2353 }
2354
2355 /*
2356 * usbvision_init_isoc()
2357 *
2358 */
2359 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2360 {
2361 struct usb_device *dev = usbvision->dev;
2362 int bufIdx, errCode, regValue;
2363 const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
2364
2365 if (!USBVISION_IS_OPERATIONAL(usbvision))
2366 return -EFAULT;
2367
2368 usbvision->curFrame = NULL;
2369 scratch_reset(usbvision);
2370
2371 /* Alternate interface 1 is is the biggest frame size */
2372 errCode = usb_set_interface(dev, usbvision->iface, usbvision->ifaceAltActive);
2373 if (errCode < 0) {
2374 usbvision->last_error = errCode;
2375 return -EBUSY;
2376 }
2377
2378 regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2379 usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1;
2380 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize);
2381
2382 usbvision->usb_bandwidth = regValue >> 1;
2383 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2384
2385
2386
2387 /* We double buffer the Iso lists */
2388
2389 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2390 int j, k;
2391 struct urb *urb;
2392
2393 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2394 if (urb == NULL) {
2395 err("%s: usb_alloc_urb() failed", __FUNCTION__);
2396 return -ENOMEM;
2397 }
2398 usbvision->sbuf[bufIdx].urb = urb;
2399 usbvision->sbuf[bufIdx].data = usb_buffer_alloc(usbvision->dev, sb_size, GFP_KERNEL,&urb->transfer_dma);
2400 urb->dev = dev;
2401 urb->context = usbvision;
2402 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2403 urb->transfer_flags = URB_ISO_ASAP;
2404 urb->interval = 1;
2405 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2406 urb->complete = usbvision_isocIrq;
2407 urb->number_of_packets = USBVISION_URB_FRAMES;
2408 urb->transfer_buffer_length =
2409 usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2410 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2411 k += usbvision->isocPacketSize) {
2412 urb->iso_frame_desc[j].offset = k;
2413 urb->iso_frame_desc[j].length = usbvision->isocPacketSize;
2414 }
2415 }
2416
2417
2418 /* Submit all URBs */
2419 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2420 errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb, GFP_KERNEL);
2421 if (errCode) {
2422 err("%s: usb_submit_urb(%d) failed: error %d", __FUNCTION__, bufIdx, errCode);
2423 }
2424 }
2425
2426 usbvision->streaming = Stream_Idle;
2427 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", __FUNCTION__, usbvision->video_endp);
2428 return 0;
2429 }
2430
2431 /*
2432 * usbvision_stop_isoc()
2433 *
2434 * This procedure stops streaming and deallocates URBs. Then it
2435 * activates zero-bandwidth alt. setting of the video interface.
2436 *
2437 */
2438 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2439 {
2440 int bufIdx, errCode, regValue;
2441 const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
2442
2443 if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2444 return;
2445
2446 /* Unschedule all of the iso td's */
2447 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2448 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2449 if (usbvision->sbuf[bufIdx].data){
2450 usb_buffer_free(usbvision->dev,
2451 sb_size,
2452 usbvision->sbuf[bufIdx].data,
2453 usbvision->sbuf[bufIdx].urb->transfer_dma);
2454 }
2455 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2456 usbvision->sbuf[bufIdx].urb = NULL;
2457 }
2458
2459
2460 PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __FUNCTION__);
2461 usbvision->streaming = Stream_Off;
2462
2463 if (!usbvision->remove_pending) {
2464
2465 /* Set packet size to 0 */
2466 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2467 usbvision->ifaceAltInactive);
2468 if (errCode < 0) {
2469 err("%s: usb_set_interface() failed: error %d", __FUNCTION__, errCode);
2470 usbvision->last_error = errCode;
2471 }
2472 regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2473 usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1;
2474 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize);
2475
2476 usbvision->usb_bandwidth = regValue >> 1;
2477 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2478 }
2479 }
2480
2481 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2482 {
2483 int mode[4];
2484 int audio[]= {1, 0, 0, 0};
2485 struct v4l2_routing route;
2486 //channel 0 is TV with audiochannel 1 (tuner mono)
2487 //channel 1 is Composite with audio channel 0 (line in)
2488 //channel 2 is S-Video with audio channel 0 (line in)
2489 //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2490
2491 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2492 usbvision->ctl_input = channel;
2493 route.input = SAA7115_COMPOSITE1;
2494 call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2495 call_i2c_clients(usbvision, VIDIOC_S_INPUT, &usbvision->ctl_input);
2496
2497 // set the new channel
2498 // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2499 // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2500
2501 switch (usbvision_device_data[usbvision->DevModel].Codec) {
2502 case CODEC_SAA7113:
2503 if (SwitchSVideoInput) { // To handle problems with S-Video Input for some devices. Use SwitchSVideoInput parameter when loading the module.
2504 mode[2] = 1;
2505 }
2506 else {
2507 mode[2] = 7;
2508 }
2509 if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) {
2510 mode[0] = 0; mode[1] = 2; mode[3] = 3; // Special for four input devices
2511 }
2512 else {
2513 mode[0] = 0; mode[1] = 2; //modes for regular saa7113 devices
2514 }
2515 break;
2516 case CODEC_SAA7111:
2517 mode[0] = 0; mode[1] = 1; mode[2] = 7; //modes for saa7111
2518 break;
2519 default:
2520 mode[0] = 0; mode[1] = 1; mode[2] = 7; //default modes
2521 }
2522 route.input = mode[channel];
2523 call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2524 usbvision->channel = channel;
2525 usbvision_set_audio(usbvision, audio[channel]);
2526 return 0;
2527 }
2528
2529 /*
2530 * Overrides for Emacs so that we follow Linus's tabbing style.
2531 * ---------------------------------------------------------------------------
2532 * Local variables:
2533 * c-basic-offset: 8
2534 * End:
2535 */
linux v2.6.22.y-op