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path: root/drivers/media/video/usbvision/usbvision-core.c
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-rw-r--r--drivers/media/video/usbvision/usbvision-core.c2554
1 files changed, 2554 insertions, 0 deletions
diff --git a/drivers/media/video/usbvision/usbvision-core.c b/drivers/media/video/usbvision/usbvision-core.c
new file mode 100644
index 0000000000..797b97baf9
--- /dev/null
+++ b/drivers/media/video/usbvision/usbvision-core.c
@@ -0,0 +1,2554 @@
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
59static unsigned int core_debug = 0;
60module_param(core_debug,int,0644);
61MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
62
63static unsigned int force_testpattern = 0;
64module_param(force_testpattern,int,0644);
65MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
66
67static int adjustCompression = 1; // Set the compression to be adaptive
68module_param(adjustCompression, int, 0444);
69MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device. Default: 1 (On)");
70
71static int SwitchSVideoInput = 0; // To help people with Black and White output with using s-video input. Some cables and input device are wired differently.
72module_param(SwitchSVideoInput, int, 0444);
73MODULE_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
92static const int max_imgwidth = MAX_FRAME_WIDTH;
93static const int max_imgheight = MAX_FRAME_HEIGHT;
94static const int min_imgwidth = MIN_FRAME_WIDTH;
95static 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
104static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
105
106// Function prototypes
107static int usbvision_request_intra (struct usb_usbvision *usbvision);
108static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
109static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
110static 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
121void *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
142void 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
164static 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 ********************************/
184int 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 */
197int 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 */
214int scratch_put(struct usb_usbvision *usbvision, unsigned char *data, int len)
215{
216 int len_part;
217
218 if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
219 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
220 usbvision->scratch_write_ptr += len;
221 }
222 else {
223 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
224 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
225 if (len == len_part) {
226 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */
227 }
228 else {
229 memcpy(usbvision->scratch, data + len_part, len - len_part);
230 usbvision->scratch_write_ptr = len - len_part;
231 }
232 }
233
234 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
235
236 return len;
237}
238
239/* This marks the write_ptr as position of new frame header */
240void scratch_mark_header(struct usb_usbvision *usbvision)
241{
242 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
243
244 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
245 usbvision->scratch_write_ptr;
246 usbvision->scratch_headermarker_write_ptr += 1;
247 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
248}
249
250/* This gets data from the buffer at the given "ptr" position */
251int scratch_get_extra(struct usb_usbvision *usbvision, unsigned char *data, int *ptr, int len)
252{
253 int len_part;
254 if (*ptr + len < scratch_buf_size) {
255 memcpy(data, usbvision->scratch + *ptr, len);
256 *ptr += len;
257 }
258 else {
259 len_part = scratch_buf_size - *ptr;
260 memcpy(data, usbvision->scratch + *ptr, len_part);
261 if (len == len_part) {
262 *ptr = 0; /* just set the y_ptr to zero */
263 }
264 else {
265 memcpy(data + len_part, usbvision->scratch, len - len_part);
266 *ptr = len - len_part;
267 }
268 }
269
270 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
271
272 return len;
273}
274
275
276/* This sets the scratch extra read pointer */
277void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr, int len)
278{
279 *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
280
281 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
282}
283
284
285/*This increments the scratch extra read pointer */
286void scratch_inc_extra_ptr(int *ptr, int len)
287{
288 *ptr = (*ptr + len) % scratch_buf_size;
289
290 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
291}
292
293
294/* This gets data from the buffer */
295int scratch_get(struct usb_usbvision *usbvision, unsigned char *data, int len)
296{
297 int len_part;
298 if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
299 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
300 usbvision->scratch_read_ptr += len;
301 }
302 else {
303 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
304 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
305 if (len == len_part) {
306 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */
307 }
308 else {
309 memcpy(data + len_part, usbvision->scratch, len - len_part);
310 usbvision->scratch_read_ptr = len - len_part;
311 }
312 }
313
314 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
315
316 return len;
317}
318
319
320/* This sets read pointer to next header and returns it */
321int scratch_get_header(struct usb_usbvision *usbvision,struct usbvision_frame_header *header)
322{
323 int errCode = 0;
324
325 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
326
327 while (usbvision->scratch_headermarker_write_ptr -
328 usbvision->scratch_headermarker_read_ptr != 0) {
329 usbvision->scratch_read_ptr =
330 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
331 usbvision->scratch_headermarker_read_ptr += 1;
332 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
333 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
334 if ((header->magic_1 == USBVISION_MAGIC_1)
335 && (header->magic_2 == USBVISION_MAGIC_2)
336 && (header->headerLength == USBVISION_HEADER_LENGTH)) {
337 errCode = USBVISION_HEADER_LENGTH;
338 header->frameWidth = header->frameWidthLo + (header->frameWidthHi << 8);
339 header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
340 break;
341 }
342 }
343
344 return errCode;
345}
346
347
348/*This removes len bytes of old data from the buffer */
349void scratch_rm_old(struct usb_usbvision *usbvision, int len)
350{
351
352 usbvision->scratch_read_ptr += len;
353 usbvision->scratch_read_ptr %= scratch_buf_size;
354 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
355}
356
357
358/*This resets the buffer - kills all data in it too */
359void scratch_reset(struct usb_usbvision *usbvision)
360{
361 PDEBUG(DBG_SCRATCH, "\n");
362
363 usbvision->scratch_read_ptr = 0;
364 usbvision->scratch_write_ptr = 0;
365 usbvision->scratch_headermarker_read_ptr = 0;
366 usbvision->scratch_headermarker_write_ptr = 0;
367 usbvision->isocstate = IsocState_NoFrame;
368}
369
370int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
371{
372 usbvision->scratch = vmalloc(scratch_buf_size);
373 scratch_reset(usbvision);
374 if(usbvision->scratch == NULL) {
375 err("%s: unable to allocate %d bytes for scratch",
376 __FUNCTION__, scratch_buf_size);
377 return -ENOMEM;
378 }
379 return 0;
380}
381
382void usbvision_scratch_free(struct usb_usbvision *usbvision)
383{
384 if (usbvision->scratch != NULL) {
385 vfree(usbvision->scratch);
386 usbvision->scratch = NULL;
387 }
388}
389
390/*
391 * usbvision_testpattern()
392 *
393 * Procedure forms a test pattern (yellow grid on blue background).
394 *
395 * Parameters:
396 * fullframe: if TRUE then entire frame is filled, otherwise the procedure
397 * continues from the current scanline.
398 * pmode 0: fill the frame with solid blue color (like on VCR or TV)
399 * 1: Draw a colored grid
400 *
401 */
402void usbvision_testpattern(struct usb_usbvision *usbvision, int fullframe,
403 int pmode)
404{
405 static const char proc[] = "usbvision_testpattern";
406 struct usbvision_frame *frame;
407 unsigned char *f;
408 int num_cell = 0;
409 int scan_length = 0;
410 static int num_pass = 0;
411
412 if (usbvision == NULL) {
413 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
414 return;
415 }
416 if (usbvision->curFrame == NULL) {
417 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
418 return;
419 }
420
421 /* Grab the current frame */
422 frame = usbvision->curFrame;
423
424 /* Optionally start at the beginning */
425 if (fullframe) {
426 frame->curline = 0;
427 frame->scanlength = 0;
428 }
429
430 /* Form every scan line */
431 for (; frame->curline < frame->frmheight; frame->curline++) {
432 int i;
433
434 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
435 for (i = 0; i < usbvision->curwidth; i++) {
436 unsigned char cb = 0x80;
437 unsigned char cg = 0;
438 unsigned char cr = 0;
439
440 if (pmode == 1) {
441 if (frame->curline % 32 == 0)
442 cb = 0, cg = cr = 0xFF;
443 else if (i % 32 == 0) {
444 if (frame->curline % 32 == 1)
445 num_cell++;
446 cb = 0, cg = cr = 0xFF;
447 } else {
448 cb =
449 ((num_cell * 7) +
450 num_pass) & 0xFF;
451 cg =
452 ((num_cell * 5) +
453 num_pass * 2) & 0xFF;
454 cr =
455 ((num_cell * 3) +
456 num_pass * 3) & 0xFF;
457 }
458 } else {
459 /* Just the blue screen */
460 }
461
462 *f++ = cb;
463 *f++ = cg;
464 *f++ = cr;
465 scan_length += 3;
466 }
467 }
468
469 frame->grabstate = FrameState_Done;
470 frame->scanlength += scan_length;
471 ++num_pass;
472
473}
474
475/*
476 * usbvision_decompress_alloc()
477 *
478 * allocates intermediate buffer for decompression
479 */
480int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
481{
482 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
483 usbvision->IntraFrameBuffer = vmalloc(IFB_size);
484 if (usbvision->IntraFrameBuffer == NULL) {
485 err("%s: unable to allocate %d for compr. frame buffer", __FUNCTION__, IFB_size);
486 return -ENOMEM;
487 }
488 return 0;
489}
490
491/*
492 * usbvision_decompress_free()
493 *
494 * frees intermediate buffer for decompression
495 */
496void usbvision_decompress_free(struct usb_usbvision *usbvision)
497{
498 if (usbvision->IntraFrameBuffer != NULL) {
499 vfree(usbvision->IntraFrameBuffer);
500 usbvision->IntraFrameBuffer = NULL;
501 }
502}
503
504/************************************************************
505 * Here comes the data parsing stuff that is run as interrupt
506 ************************************************************/
507/*
508 * usbvision_find_header()
509 *
510 * Locate one of supported header markers in the scratch buffer.
511 */
512static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
513{
514 struct usbvision_frame *frame;
515 int foundHeader = 0;
516
517 frame = usbvision->curFrame;
518
519 while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
520 // found header in scratch
521 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
522 frame->isocHeader.magic_2,
523 frame->isocHeader.magic_1,
524 frame->isocHeader.headerLength,
525 frame->isocHeader.frameNum,
526 frame->isocHeader.framePhase,
527 frame->isocHeader.frameLatency,
528 frame->isocHeader.dataFormat,
529 frame->isocHeader.formatParam,
530 frame->isocHeader.frameWidth,
531 frame->isocHeader.frameHeight);
532
533 if (usbvision->requestIntra) {
534 if (frame->isocHeader.formatParam & 0x80) {
535 foundHeader = 1;
536 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
537 usbvision_unrequest_intra(usbvision);
538 break;
539 }
540 }
541 else {
542 foundHeader = 1;
543 break;
544 }
545 }
546
547 if (foundHeader) {
548 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
549 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
550 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
551 }
552 else { // no header found
553 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
554 scratch_reset(usbvision);
555 return ParseState_EndParse;
556 }
557
558 // found header
559 if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
560 //check isocHeader.frameNum for lost frames
561 if (usbvision->lastIsocFrameNum >= 0) {
562 if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
563 // unexpected frame drop: need to request new intra frame
564 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
565 usbvision_request_intra(usbvision);
566 return ParseState_NextFrame;
567 }
568 }
569 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
570 }
571 usbvision->header_count++;
572 frame->scanstate = ScanState_Lines;
573 frame->curline = 0;
574
575 if (force_testpattern) {
576 usbvision_testpattern(usbvision, 1, 1);
577 return ParseState_NextFrame;
578 }
579 return ParseState_Continue;
580}
581
582static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
583 long *pcopylen)
584{
585 volatile struct usbvision_frame *frame;
586 unsigned char *f;
587 int len;
588 int i;
589 unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
590 unsigned char rv, gv, bv; // RGB components
591 int clipmask_index, bytes_per_pixel;
592 int stretch_bytes, clipmask_add;
593
594 frame = usbvision->curFrame;
595 f = frame->data + (frame->v4l2_linesize * frame->curline);
596
597 /* Make sure there's enough data for the entire line */
598 len = (frame->isocHeader.frameWidth * 2)+5;
599 if (scratch_len(usbvision) < len) {
600 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
601 return ParseState_Out;
602 }
603
604 if ((frame->curline + 1) >= frame->frmheight) {
605 return ParseState_NextFrame;
606 }
607
608 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
609 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
610 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
611 clipmask_add = usbvision->stretch_width;
612
613 for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
614
615 scratch_get(usbvision, &yuyv[0], 4);
616
617 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
618 *f++ = yuyv[0]; // Y
619 *f++ = yuyv[3]; // U
620 }
621 else {
622
623 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
624 switch (frame->v4l2_format.format) {
625 case V4L2_PIX_FMT_RGB565:
626 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
627 *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv);
628 break;
629 case V4L2_PIX_FMT_RGB24:
630 *f++ = bv;
631 *f++ = gv;
632 *f++ = rv;
633 break;
634 case V4L2_PIX_FMT_RGB32:
635 *f++ = bv;
636 *f++ = gv;
637 *f++ = rv;
638 f++;
639 break;
640 case V4L2_PIX_FMT_RGB555:
641 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
642 *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
643 break;
644 }
645 }
646 clipmask_index += clipmask_add;
647 f += stretch_bytes;
648
649 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
650 *f++ = yuyv[2]; // Y
651 *f++ = yuyv[1]; // V
652 }
653 else {
654
655 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
656 switch (frame->v4l2_format.format) {
657 case V4L2_PIX_FMT_RGB565:
658 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
659 *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv);
660 break;
661 case V4L2_PIX_FMT_RGB24:
662 *f++ = bv;
663 *f++ = gv;
664 *f++ = rv;
665 break;
666 case V4L2_PIX_FMT_RGB32:
667 *f++ = bv;
668 *f++ = gv;
669 *f++ = rv;
670 f++;
671 break;
672 case V4L2_PIX_FMT_RGB555:
673 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
674 *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
675 break;
676 }
677 }
678 clipmask_index += clipmask_add;
679 f += stretch_bytes;
680 }
681
682 frame->curline += usbvision->stretch_height;
683 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
684
685 if (frame->curline >= frame->frmheight) {
686 return ParseState_NextFrame;
687 }
688 else {
689 return ParseState_Continue;
690 }
691}
692
693/* The decompression routine */
694static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
695 unsigned char *Decompressed, int *StartPos,
696 int *BlockTypeStartPos, int Len)
697{
698 int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
699 unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
700
701 Integrator = 0;
702 Pos = *StartPos;
703 BlockTypePos = *BlockTypeStartPos;
704 MaxPos = 396; //Pos + Len;
705 ExtraPos = Pos;
706 BlockLen = 0;
707 BlockByte = 0;
708 BlockCode = 0;
709 BlockType = 0;
710 BlockTypeByte = 0;
711 BlockTypeLen = 0;
712 RestPixel = Len;
713
714 for (Idx = 0; Idx < Len; Idx++) {
715
716 if (BlockLen == 0) {
717 if (BlockTypeLen==0) {
718 BlockTypeByte = Compressed[BlockTypePos];
719 BlockTypePos++;
720 BlockTypeLen = 4;
721 }
722 BlockType = (BlockTypeByte & 0xC0) >> 6;
723
724 //statistic:
725 usbvision->ComprBlockTypes[BlockType]++;
726
727 Pos = ExtraPos;
728 if (BlockType == 0) {
729 if(RestPixel >= 24) {
730 Idx += 23;
731 RestPixel -= 24;
732 Integrator = Decompressed[Idx];
733 } else {
734 Idx += RestPixel - 1;
735 RestPixel = 0;
736 }
737 } else {
738 BlockCode = Compressed[Pos];
739 Pos++;
740 if (RestPixel >= 24) {
741 BlockLen = 24;
742 } else {
743 BlockLen = RestPixel;
744 }
745 RestPixel -= BlockLen;
746 ExtraPos = Pos + (BlockLen / 4);
747 }
748 BlockTypeByte <<= 2;
749 BlockTypeLen -= 1;
750 }
751 if (BlockLen > 0) {
752 if ((BlockLen%4) == 0) {
753 BlockByte = Compressed[Pos];
754 Pos++;
755 }
756 if (BlockType == 1) { //inter Block
757 Integrator = Decompressed[Idx];
758 }
759 switch (BlockByte & 0xC0) {
760 case 0x03<<6:
761 Integrator += Compressed[ExtraPos];
762 ExtraPos++;
763 break;
764 case 0x02<<6:
765 Integrator += BlockCode;
766 break;
767 case 0x00:
768 Integrator -= BlockCode;
769 break;
770 }
771 Decompressed[Idx] = Integrator;
772 BlockByte <<= 2;
773 BlockLen -= 1;
774 }
775 }
776 *StartPos = ExtraPos;
777 *BlockTypeStartPos = BlockTypePos;
778 return Idx;
779}
780
781
782/*
783 * usbvision_parse_compress()
784 *
785 * Parse compressed frame from the scratch buffer, put
786 * decoded RGB value into the current frame buffer and add the written
787 * number of bytes (RGB) to the *pcopylen.
788 *
789 */
790static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
791 long *pcopylen)
792{
793#define USBVISION_STRIP_MAGIC 0x5A
794#define USBVISION_STRIP_LEN_MAX 400
795#define USBVISION_STRIP_HEADER_LEN 3
796
797 struct usbvision_frame *frame;
798 unsigned char *f,*u = NULL ,*v = NULL;
799 unsigned char StripData[USBVISION_STRIP_LEN_MAX];
800 unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
801 int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
802 int clipmask_index, bytes_per_pixel, rc;
803 int imageSize;
804 unsigned char rv, gv, bv;
805 static unsigned char *Y, *U, *V;
806
807 frame = usbvision->curFrame;
808 imageSize = frame->frmwidth * frame->frmheight;
809 if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
810 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) { // this is a planar format
811 //... v4l2_linesize not used here.
812 f = frame->data + (frame->width * frame->curline);
813 } else
814 f = frame->data + (frame->v4l2_linesize * frame->curline);
815
816 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
817 // get base of u and b planes add halfoffset
818
819 u = frame->data
820 + imageSize
821 + (frame->frmwidth >>1) * frame->curline ;
822 v = u + (imageSize >>1 );
823
824 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
825
826 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
827 u = v + (imageSize >>2) ;
828 }
829
830 if (frame->curline == 0) {
831 usbvision_adjust_compression(usbvision);
832 }
833
834 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
835 return ParseState_Out;
836 }
837
838 //get strip header without changing the scratch_read_ptr
839 scratch_set_extra_ptr(usbvision, &StripPtr, 0);
840 scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
841 USBVISION_STRIP_HEADER_LEN);
842
843 if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
844 // wrong strip magic
845 usbvision->stripMagicErrors++;
846 return ParseState_NextFrame;
847 }
848
849 if (frame->curline != (int)StripHeader[2]) {
850 //line number missmatch error
851 usbvision->stripLineNumberErrors++;
852 }
853
854 StripLen = 2 * (unsigned int)StripHeader[1];
855 if (StripLen > USBVISION_STRIP_LEN_MAX) {
856 // strip overrun
857 // I think this never happens
858 usbvision_request_intra(usbvision);
859 }
860
861 if (scratch_len(usbvision) < StripLen) {
862 //there is not enough data for the strip
863 return ParseState_Out;
864 }
865
866 if (usbvision->IntraFrameBuffer) {
867 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
868 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
869 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
870 }
871 else {
872 return ParseState_NextFrame;
873 }
874
875 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
876 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
877
878 scratch_get(usbvision, StripData, StripLen);
879
880 IdxEnd = frame->frmwidth;
881 BlockTypePos = USBVISION_STRIP_HEADER_LEN;
882 StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
883 BlockPos = StartBlockPos;
884
885 usbvision->BlockPos = BlockPos;
886
887 if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
888 //return ParseState_Continue;
889 }
890 if (StripLen > usbvision->maxStripLen) {
891 usbvision->maxStripLen = StripLen;
892 }
893
894 if (frame->curline%2) {
895 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
896 //return ParseState_Continue;
897 }
898 }
899 else {
900 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
901 //return ParseState_Continue;
902 }
903 }
904
905 if (BlockPos > usbvision->comprBlockPos) {
906 usbvision->comprBlockPos = BlockPos;
907 }
908 if (BlockPos > StripLen) {
909 usbvision->stripLenErrors++;
910 }
911
912 for (Idx = 0; Idx < IdxEnd; Idx++) {
913 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
914 *f++ = Y[Idx];
915 *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
916 }
917 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
918 *f++ = Y[Idx];
919 if ( Idx & 0x01)
920 *u++ = U[Idx>>1] ;
921 else
922 *v++ = V[Idx>>1];
923 }
924 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
925 *f++ = Y [Idx];
926 if ( !(( Idx & 0x01 ) | ( frame->curline & 0x01 )) ){
927
928/* only need do this for 1 in 4 pixels */
929/* intraframe buffer is YUV420 format */
930
931 *u++ = U[Idx >>1];
932 *v++ = V[Idx >>1];
933 }
934
935 }
936 else {
937 YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
938 switch (frame->v4l2_format.format) {
939 case V4L2_PIX_FMT_GREY:
940 *f++ = Y[Idx];
941 break;
942 case V4L2_PIX_FMT_RGB555:
943 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
944 *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
945 break;
946 case V4L2_PIX_FMT_RGB565:
947 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
948 *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv);
949 break;
950 case V4L2_PIX_FMT_RGB24:
951 *f++ = bv;
952 *f++ = gv;
953 *f++ = rv;
954 break;
955 case V4L2_PIX_FMT_RGB32:
956 *f++ = bv;
957 *f++ = gv;
958 *f++ = rv;
959 f++;
960 break;
961 }
962 }
963 clipmask_index++;
964 }
965 /* Deal with non-integer no. of bytes for YUV420P */
966 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
967 *pcopylen += frame->v4l2_linesize;
968 else
969 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
970
971 frame->curline += 1;
972
973 if (frame->curline >= frame->frmheight) {
974 return ParseState_NextFrame;
975 }
976 else {
977 return ParseState_Continue;
978 }
979
980}
981
982
983/*
984 * usbvision_parse_lines_420()
985 *
986 * Parse two lines from the scratch buffer, put
987 * decoded RGB value into the current frame buffer and add the written
988 * number of bytes (RGB) to the *pcopylen.
989 *
990 */
991static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
992 long *pcopylen)
993{
994 struct usbvision_frame *frame;
995 unsigned char *f_even = NULL, *f_odd = NULL;
996 unsigned int pixel_per_line, block;
997 int pixel, block_split;
998 int y_ptr, u_ptr, v_ptr, y_odd_offset;
999 const int y_block_size = 128;
1000 const int uv_block_size = 64;
1001 const int sub_block_size = 32;
1002 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
1003 const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1004 unsigned char y[2], u, v; /* YUV components */
1005 int y_, u_, v_, vb, uvg, ur;
1006 int r_, g_, b_; /* RGB components */
1007 unsigned char g;
1008 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1009 int clipmask_add, stretch_bytes;
1010
1011 frame = usbvision->curFrame;
1012 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1013 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1014
1015 /* Make sure there's enough data for the entire line */
1016 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1017 /* I need two lines to decode the color */
1018 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1019 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1020 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1021 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
1022 clipmask_add = usbvision->stretch_width;
1023 pixel_per_line = frame->isocHeader.frameWidth;
1024
1025 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1026 //printk(KERN_DEBUG "out of data, need %d\n", len);
1027 return ParseState_Out;
1028 }
1029
1030 if ((frame->curline + 1) >= frame->frmheight) {
1031 return ParseState_NextFrame;
1032 }
1033
1034 block_split = (pixel_per_line%y_block_size) ? 1 : 0; //are some blocks splitted into different lines?
1035
1036 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1037 + block_split * uv_block_size;
1038
1039 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1040 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1041 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1042 + (4 - block_split) * sub_block_size);
1043
1044 for (block = 0; block < (pixel_per_line / sub_block_size);
1045 block++) {
1046
1047
1048 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1049 scratch_get(usbvision, &y[0], 2);
1050 scratch_get_extra(usbvision, &u, &u_ptr, 1);
1051 scratch_get_extra(usbvision, &v, &v_ptr, 1);
1052
1053 //I don't use the YUV_TO_RGB macro for better performance
1054 v_ = v - 128;
1055 u_ = u - 128;
1056 vb = 132252 * v_;
1057 uvg= -53281 * u_ - 25625 * v_;
1058 ur = 104595 * u_;
1059
1060 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1061 *f_even++ = y[0];
1062 *f_even++ = v;
1063 }
1064 else {
1065 y_ = 76284 * (y[0] - 16);
1066
1067 b_ = (y_ + vb) >> 16;
1068 g_ = (y_ + uvg)>> 16;
1069 r_ = (y_ + ur) >> 16;
1070
1071 switch (frame->v4l2_format.format) {
1072 case V4L2_PIX_FMT_RGB565:
1073 g = LIMIT_RGB(g_);
1074 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1075 *f_even++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1076 break;
1077 case V4L2_PIX_FMT_RGB24:
1078 *f_even++ = LIMIT_RGB(b_);
1079 *f_even++ = LIMIT_RGB(g_);
1080 *f_even++ = LIMIT_RGB(r_);
1081 break;
1082 case V4L2_PIX_FMT_RGB32:
1083 *f_even++ = LIMIT_RGB(b_);
1084 *f_even++ = LIMIT_RGB(g_);
1085 *f_even++ = LIMIT_RGB(r_);
1086 f_even++;
1087 break;
1088 case V4L2_PIX_FMT_RGB555:
1089 g = LIMIT_RGB(g_);
1090 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1091 *f_even++ = (0x03 & ( g >> 6)) |
1092 (0x7C & (LIMIT_RGB(r_) >> 1));
1093 break;
1094 }
1095 }
1096 clipmask_even_index += clipmask_add;
1097 f_even += stretch_bytes;
1098
1099 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1100 *f_even++ = y[1];
1101 *f_even++ = u;
1102 }
1103 else {
1104 y_ = 76284 * (y[1] - 16);
1105
1106 b_ = (y_ + vb) >> 16;
1107 g_ = (y_ + uvg)>> 16;
1108 r_ = (y_ + ur) >> 16;
1109
1110 switch (frame->v4l2_format.format) {
1111 case V4L2_PIX_FMT_RGB565:
1112 g = LIMIT_RGB(g_);
1113 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1114 *f_even++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1115 break;
1116 case V4L2_PIX_FMT_RGB24:
1117 *f_even++ = LIMIT_RGB(b_);
1118 *f_even++ = LIMIT_RGB(g_);
1119 *f_even++ = LIMIT_RGB(r_);
1120 break;
1121 case V4L2_PIX_FMT_RGB32:
1122 *f_even++ = LIMIT_RGB(b_);
1123 *f_even++ = LIMIT_RGB(g_);
1124 *f_even++ = LIMIT_RGB(r_);
1125 f_even++;
1126 break;
1127 case V4L2_PIX_FMT_RGB555:
1128 g = LIMIT_RGB(g_);
1129 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1130 *f_even++ = (0x03 & ( g >> 6)) |
1131 (0x7C & (LIMIT_RGB(r_) >> 1));
1132 break;
1133 }
1134 }
1135 clipmask_even_index += clipmask_add;
1136 f_even += stretch_bytes;
1137
1138 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1139
1140 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1141 *f_odd++ = y[0];
1142 *f_odd++ = v;
1143 }
1144 else {
1145 y_ = 76284 * (y[0] - 16);
1146
1147 b_ = (y_ + vb) >> 16;
1148 g_ = (y_ + uvg)>> 16;
1149 r_ = (y_ + ur) >> 16;
1150
1151 switch (frame->v4l2_format.format) {
1152 case V4L2_PIX_FMT_RGB565:
1153 g = LIMIT_RGB(g_);
1154 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1155 *f_odd++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1156 break;
1157 case V4L2_PIX_FMT_RGB24:
1158 *f_odd++ = LIMIT_RGB(b_);
1159 *f_odd++ = LIMIT_RGB(g_);
1160 *f_odd++ = LIMIT_RGB(r_);
1161 break;
1162 case V4L2_PIX_FMT_RGB32:
1163 *f_odd++ = LIMIT_RGB(b_);
1164 *f_odd++ = LIMIT_RGB(g_);
1165 *f_odd++ = LIMIT_RGB(r_);
1166 f_odd++;
1167 break;
1168 case V4L2_PIX_FMT_RGB555:
1169 g = LIMIT_RGB(g_);
1170 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1171 *f_odd++ = (0x03 & ( g >> 6)) |
1172 (0x7C & (LIMIT_RGB(r_) >> 1));
1173 break;
1174 }
1175 }
1176 clipmask_odd_index += clipmask_add;
1177 f_odd += stretch_bytes;
1178
1179 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1180 *f_odd++ = y[1];
1181 *f_odd++ = u;
1182 }
1183 else {
1184 y_ = 76284 * (y[1] - 16);
1185
1186 b_ = (y_ + vb) >> 16;
1187 g_ = (y_ + uvg)>> 16;
1188 r_ = (y_ + ur) >> 16;
1189
1190 switch (frame->v4l2_format.format) {
1191 case V4L2_PIX_FMT_RGB565:
1192 g = LIMIT_RGB(g_);
1193 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1194 *f_odd++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1195 break;
1196 case V4L2_PIX_FMT_RGB24:
1197 *f_odd++ = LIMIT_RGB(b_);
1198 *f_odd++ = LIMIT_RGB(g_);
1199 *f_odd++ = LIMIT_RGB(r_);
1200 break;
1201 case V4L2_PIX_FMT_RGB32:
1202 *f_odd++ = LIMIT_RGB(b_);
1203 *f_odd++ = LIMIT_RGB(g_);
1204 *f_odd++ = LIMIT_RGB(r_);
1205 f_odd++;
1206 break;
1207 case V4L2_PIX_FMT_RGB555:
1208 g = LIMIT_RGB(g_);
1209 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1210 *f_odd++ = (0x03 & ( g >> 6)) |
1211 (0x7C & (LIMIT_RGB(r_) >> 1));
1212 break;
1213 }
1214 }
1215 clipmask_odd_index += clipmask_add;
1216 f_odd += stretch_bytes;
1217 }
1218
1219 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1220 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1221 * sub_block_size);
1222 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1223 * sub_block_size);
1224 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1225 * sub_block_size);
1226 }
1227
1228 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1229 + block_split * sub_block_size);
1230
1231 frame->curline += 2 * usbvision->stretch_height;
1232 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1233
1234 if (frame->curline >= frame->frmheight)
1235 return ParseState_NextFrame;
1236 else
1237 return ParseState_Continue;
1238}
1239
1240/*
1241 * usbvision_parse_data()
1242 *
1243 * Generic routine to parse the scratch buffer. It employs either
1244 * usbvision_find_header() or usbvision_parse_lines() to do most
1245 * of work.
1246 *
1247 */
1248static void usbvision_parse_data(struct usb_usbvision *usbvision)
1249{
1250 struct usbvision_frame *frame;
1251 enum ParseState newstate;
1252 long copylen = 0;
1253 unsigned long lock_flags;
1254
1255 frame = usbvision->curFrame;
1256
1257 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1258
1259 while (1) {
1260
1261 newstate = ParseState_Out;
1262 if (scratch_len(usbvision)) {
1263 if (frame->scanstate == ScanState_Scanning) {
1264 newstate = usbvision_find_header(usbvision);
1265 }
1266 else if (frame->scanstate == ScanState_Lines) {
1267 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1268 newstate = usbvision_parse_lines_420(usbvision, &copylen);
1269 }
1270 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1271 newstate = usbvision_parse_lines_422(usbvision, &copylen);
1272 }
1273 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1274 newstate = usbvision_parse_compress(usbvision, &copylen);
1275 }
1276
1277 }
1278 }
1279 if (newstate == ParseState_Continue) {
1280 continue;
1281 }
1282 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1283 break;
1284 }
1285 else {
1286 return; /* ParseState_EndParse */
1287 }
1288 }
1289
1290 if (newstate == ParseState_NextFrame) {
1291 frame->grabstate = FrameState_Done;
1292 do_gettimeofday(&(frame->timestamp));
1293 frame->sequence = usbvision->frame_num;
1294
1295 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1296 list_move_tail(&(frame->frame), &usbvision->outqueue);
1297 usbvision->curFrame = NULL;
1298 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1299
1300 usbvision->frame_num++;
1301
1302 /* This will cause the process to request another frame. */
1303 if (waitqueue_active(&usbvision->wait_frame)) {
1304 PDEBUG(DBG_PARSE, "Wake up !");
1305 wake_up_interruptible(&usbvision->wait_frame);
1306 }
1307 }
1308 else
1309 frame->grabstate = FrameState_Grabbing;
1310
1311
1312 /* Update the frame's uncompressed length. */
1313 frame->scanlength += copylen;
1314}
1315
1316
1317/*
1318 * Make all of the blocks of data contiguous
1319 */
1320static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1321 struct urb *urb)
1322{
1323 unsigned char *packet_data;
1324 int i, totlen = 0;
1325
1326 for (i = 0; i < urb->number_of_packets; i++) {
1327 int packet_len = urb->iso_frame_desc[i].actual_length;
1328 int packet_stat = urb->iso_frame_desc[i].status;
1329
1330 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1331
1332 /* Detect and ignore errored packets */
1333 if (packet_stat) { // packet_stat != 0 ?????????????
1334 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1335 usbvision->isocErrCount++;
1336 continue;
1337 }
1338
1339 /* Detect and ignore empty packets */
1340 if (packet_len < 0) {
1341 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1342 usbvision->isocSkipCount++;
1343 continue;
1344 }
1345 else if (packet_len == 0) { /* Frame end ????? */
1346 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1347 usbvision->isocstate=IsocState_NoFrame;
1348 usbvision->isocSkipCount++;
1349 continue;
1350 }
1351 else if (packet_len > usbvision->isocPacketSize) {
1352 PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1353 usbvision->isocSkipCount++;
1354 continue;
1355 }
1356
1357 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1358
1359 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1360 usbvision->isocstate=IsocState_InFrame;
1361 scratch_mark_header(usbvision);
1362 usbvision_measure_bandwidth(usbvision);
1363 PDEBUG(DBG_ISOC, "packet with header");
1364 }
1365
1366 /*
1367 * If usbvision continues to feed us with data but there is no
1368 * consumption (if, for example, V4L client fell asleep) we
1369 * may overflow the buffer. We have to move old data over to
1370 * free room for new data. This is bad for old data. If we
1371 * just drop new data then it's bad for new data... choose
1372 * your favorite evil here.
1373 */
1374 if (scratch_free(usbvision) < packet_len) {
1375
1376 usbvision->scratch_ovf_count++;
1377 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1378 scratch_len(usbvision), packet_len);
1379 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1380 }
1381
1382 /* Now we know that there is enough room in scratch buffer */
1383 scratch_put(usbvision, packet_data, packet_len);
1384 totlen += packet_len;
1385 usbvision->isocDataCount += packet_len;
1386 usbvision->isocPacketCount++;
1387 }
1388#if ENABLE_HEXDUMP
1389 if (totlen > 0) {
1390 static int foo = 0;
1391 if (foo < 1) {
1392 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1393 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1394 ++foo;
1395 }
1396 }
1397#endif
1398 return totlen;
1399}
1400
1401static void usbvision_isocIrq(struct urb *urb)
1402{
1403 int errCode = 0;
1404 int len;
1405 struct usb_usbvision *usbvision = urb->context;
1406 int i;
1407 unsigned long startTime = jiffies;
1408 struct usbvision_frame **f;
1409
1410 /* We don't want to do anything if we are about to be removed! */
1411 if (!USBVISION_IS_OPERATIONAL(usbvision))
1412 return;
1413
1414 f = &usbvision->curFrame;
1415
1416 /* Manage streaming interruption */
1417 if (usbvision->streaming == Stream_Interrupt) {
1418 usbvision->streaming = Stream_Idle;
1419 if ((*f)) {
1420 (*f)->grabstate = FrameState_Ready;
1421 (*f)->scanstate = ScanState_Scanning;
1422 }
1423 PDEBUG(DBG_IRQ, "stream interrupted");
1424 wake_up_interruptible(&usbvision->wait_stream);
1425 }
1426
1427 /* Copy the data received into our scratch buffer */
1428 len = usbvision_compress_isochronous(usbvision, urb);
1429
1430 usbvision->isocUrbCount++;
1431 usbvision->urb_length = len;
1432
1433 if (usbvision->streaming == Stream_On) {
1434
1435 /* If we collected enough data let's parse! */
1436 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH) { /* 12 == header_length */
1437 /*If we don't have a frame we're current working on, complain */
1438 if(!list_empty(&(usbvision->inqueue))) {
1439 if (!(*f)) {
1440 (*f) = list_entry(usbvision->inqueue.next,struct usbvision_frame, frame);
1441 }
1442 usbvision_parse_data(usbvision);
1443 }
1444 else {
1445 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1446 scratch_reset(usbvision);
1447 }
1448 }
1449 }
1450 else {
1451 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1452 scratch_reset(usbvision);
1453 }
1454
1455 usbvision->timeInIrq += jiffies - startTime;
1456
1457 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1458 urb->iso_frame_desc[i].status = 0;
1459 urb->iso_frame_desc[i].actual_length = 0;
1460 }
1461
1462 urb->status = 0;
1463 urb->dev = usbvision->dev;
1464 errCode = usb_submit_urb (urb, GFP_ATOMIC);
1465
1466 /* Disable this warning. By design of the driver. */
1467 // if(errCode) {
1468 // err("%s: usb_submit_urb failed: error %d", __FUNCTION__, errCode);
1469 // }
1470
1471 return;
1472}
1473
1474/*************************************/
1475/* Low level usbvision access functions */
1476/*************************************/
1477
1478/*
1479 * usbvision_read_reg()
1480 *
1481 * return < 0 -> Error
1482 * >= 0 -> Data
1483 */
1484
1485int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1486{
1487 int errCode = 0;
1488 unsigned char buffer[1];
1489
1490 if (!USBVISION_IS_OPERATIONAL(usbvision))
1491 return -1;
1492
1493 errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1494 USBVISION_OP_CODE,
1495 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1496 0, (__u16) reg, buffer, 1, HZ);
1497
1498 if (errCode < 0) {
1499 err("%s: failed: error %d", __FUNCTION__, errCode);
1500 return errCode;
1501 }
1502 return buffer[0];
1503}
1504
1505/*
1506 * usbvision_write_reg()
1507 *
1508 * return 1 -> Reg written
1509 * 0 -> usbvision is not yet ready
1510 * -1 -> Something went wrong
1511 */
1512
1513int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1514 unsigned char value)
1515{
1516 int errCode = 0;
1517
1518 if (!USBVISION_IS_OPERATIONAL(usbvision))
1519 return 0;
1520
1521 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1522 USBVISION_OP_CODE,
1523 USB_DIR_OUT | USB_TYPE_VENDOR |
1524 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1525
1526 if (errCode < 0) {
1527 err("%s: failed: error %d", __FUNCTION__, errCode);
1528 }
1529 return errCode;
1530}
1531
1532
1533static void usbvision_ctrlUrb_complete(struct urb *urb)
1534{
1535 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1536
1537 PDEBUG(DBG_IRQ, "");
1538 usbvision->ctrlUrbBusy = 0;
1539 if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1540 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1541 }
1542}
1543
1544
1545static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1546 unsigned char *data, int len)
1547{
1548 int errCode = 0;
1549
1550 PDEBUG(DBG_IRQ, "");
1551 if (len > 8) {
1552 return -EFAULT;
1553 }
1554// down(&usbvision->ctrlUrbLock);
1555 if (usbvision->ctrlUrbBusy) {
1556// up(&usbvision->ctrlUrbLock);
1557 return -EBUSY;
1558 }
1559 usbvision->ctrlUrbBusy = 1;
1560// up(&usbvision->ctrlUrbLock);
1561
1562 usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1563 usbvision->ctrlUrbSetup.bRequest = USBVISION_OP_CODE;
1564 usbvision->ctrlUrbSetup.wValue = 0;
1565 usbvision->ctrlUrbSetup.wIndex = cpu_to_le16(address);
1566 usbvision->ctrlUrbSetup.wLength = cpu_to_le16(len);
1567 usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1568 usb_sndctrlpipe(usbvision->dev, 1),
1569 (unsigned char *)&usbvision->ctrlUrbSetup,
1570 (void *)usbvision->ctrlUrbBuffer, len,
1571 usbvision_ctrlUrb_complete,
1572 (void *)usbvision);
1573
1574 memcpy(usbvision->ctrlUrbBuffer, data, len);
1575
1576 errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1577 if (errCode < 0) {
1578 // error in usb_submit_urb()
1579 usbvision->ctrlUrbBusy = 0;
1580 }
1581 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1582 return errCode;
1583}
1584
1585
1586static int usbvision_init_compression(struct usb_usbvision *usbvision)
1587{
1588 int errCode = 0;
1589
1590 usbvision->lastIsocFrameNum = -1;
1591 usbvision->isocDataCount = 0;
1592 usbvision->isocPacketCount = 0;
1593 usbvision->isocSkipCount = 0;
1594 usbvision->comprLevel = 50;
1595 usbvision->lastComprLevel = -1;
1596 usbvision->isocUrbCount = 0;
1597 usbvision->requestIntra = 1;
1598 usbvision->isocMeasureBandwidthCount = 0;
1599
1600 return errCode;
1601}
1602
1603/* this function measures the used bandwidth since last call
1604 * return: 0 : no error
1605 * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1606 */
1607static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1608{
1609 int errCode = 0;
1610
1611 if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1612 usbvision->isocMeasureBandwidthCount++;
1613 return errCode;
1614 }
1615 if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1616 usbvision->usedBandwidth = usbvision->isocDataCount /
1617 (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1618 100 / usbvision->isocPacketSize;
1619 }
1620 usbvision->isocMeasureBandwidthCount = 0;
1621 usbvision->isocDataCount = 0;
1622 usbvision->isocPacketCount = 0;
1623 usbvision->isocSkipCount = 0;
1624 return errCode;
1625}
1626
1627static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1628{
1629 int errCode = 0;
1630 unsigned char buffer[6];
1631
1632 PDEBUG(DBG_IRQ, "");
1633 if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1634 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1635 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1636 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1637 int distorsion;
1638 if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1639 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM Threshold 1
1640 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM Threshold 2
1641 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1642 buffer[2] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (inter)
1643 buffer[3] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (intra)
1644 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1645 buffer[4] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (inter)
1646 buffer[5] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (intra)
1647 }
1648 else { //BRIDGE_NT1003
1649 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM threshold 1
1650 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM threshold 2
1651 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1652 buffer[2] = (unsigned char)(distorsion & 0xFF); // distorsion threshold bit0-7
1653 buffer[3] = 0; //(unsigned char)((distorsion >> 8) & 0x0F); // distorsion threshold bit 8-11
1654 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1655 buffer[4] = (unsigned char)(distorsion & 0xFF); // maximum distorsion bit0-7
1656 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01); // maximum distorsion bit 8
1657 }
1658 errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1659 if (errCode == 0){
1660 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1661 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1662 usbvision->lastComprLevel = usbvision->comprLevel;
1663 }
1664 }
1665 }
1666 return errCode;
1667}
1668
1669static int usbvision_request_intra (struct usb_usbvision *usbvision)
1670{
1671 int errCode = 0;
1672 unsigned char buffer[1];
1673
1674 PDEBUG(DBG_IRQ, "");
1675 usbvision->requestIntra = 1;
1676 buffer[0] = 1;
1677 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1678 return errCode;
1679}
1680
1681static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1682{
1683 int errCode = 0;
1684 unsigned char buffer[1];
1685
1686 PDEBUG(DBG_IRQ, "");
1687 usbvision->requestIntra = 0;
1688 buffer[0] = 0;
1689 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1690 return errCode;
1691}
1692
1693/*******************************
1694 * usbvision utility functions
1695 *******************************/
1696
1697int usbvision_power_off(struct usb_usbvision *usbvision)
1698{
1699 int errCode = 0;
1700
1701 PDEBUG(DBG_FUNC, "");
1702
1703 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1704 if (errCode == 1) {
1705 usbvision->power = 0;
1706 }
1707 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1708 return errCode;
1709}
1710
1711/*
1712 * usbvision_set_video_format()
1713 *
1714 */
1715static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1716{
1717 static const char proc[] = "usbvision_set_video_format";
1718 int rc;
1719 unsigned char value[2];
1720
1721 if (!USBVISION_IS_OPERATIONAL(usbvision))
1722 return 0;
1723
1724 PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1725
1726 if ((format != ISOC_MODE_YUV422)
1727 && (format != ISOC_MODE_YUV420)
1728 && (format != ISOC_MODE_COMPRESS)) {
1729 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1730 format);
1731 format = ISOC_MODE_YUV420;
1732 }
1733 value[0] = 0x0A; //TODO: See the effect of the filter
1734 value[1] = format;
1735 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1736 USBVISION_OP_CODE,
1737 USB_DIR_OUT | USB_TYPE_VENDOR |
1738 USB_RECIP_ENDPOINT, 0,
1739 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1740
1741 if (rc < 0) {
1742 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1743 "reconnect or reload driver.\n", proc, rc);
1744 }
1745 usbvision->isocMode = format;
1746 return rc;
1747}
1748
1749/*
1750 * usbvision_set_output()
1751 *
1752 */
1753
1754int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1755 int height)
1756{
1757 int errCode = 0;
1758 int UsbWidth, UsbHeight;
1759 unsigned int frameRate=0, frameDrop=0;
1760 unsigned char value[4];
1761
1762 if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1763 return 0;
1764 }
1765
1766 if (width > MAX_USB_WIDTH) {
1767 UsbWidth = width / 2;
1768 usbvision->stretch_width = 2;
1769 }
1770 else {
1771 UsbWidth = width;
1772 usbvision->stretch_width = 1;
1773 }
1774
1775 if (height > MAX_USB_HEIGHT) {
1776 UsbHeight = height / 2;
1777 usbvision->stretch_height = 2;
1778 }
1779 else {
1780 UsbHeight = height;
1781 usbvision->stretch_height = 1;
1782 }
1783
1784 RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1785 UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1786 RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1787 UsbHeight &= ~(1);
1788
1789 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1790 UsbWidth, UsbHeight, width, height,
1791 usbvision->stretch_width, usbvision->stretch_height);
1792
1793 /* I'll not rewrite the same values */
1794 if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1795 value[0] = UsbWidth & 0xff; //LSB
1796 value[1] = (UsbWidth >> 8) & 0x03; //MSB
1797 value[2] = UsbHeight & 0xff; //LSB
1798 value[3] = (UsbHeight >> 8) & 0x03; //MSB
1799
1800 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1801 USBVISION_OP_CODE,
1802 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1803 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1804
1805 if (errCode < 0) {
1806 err("%s failed: error %d", __FUNCTION__, errCode);
1807 return errCode;
1808 }
1809 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1810 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1811 }
1812
1813 if (usbvision->isocMode == ISOC_MODE_YUV422) {
1814 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1815 }
1816 else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1817 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1818 }
1819 else {
1820 frameRate = FRAMERATE_MAX;
1821 }
1822
1823 if (usbvision->tvnorm->id & V4L2_STD_625_50) {
1824 frameDrop = frameRate * 32 / 25 - 1;
1825 }
1826 else if (usbvision->tvnorm->id & V4L2_STD_525_60) {
1827 frameDrop = frameRate * 32 / 30 - 1;
1828 }
1829
1830 RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1831
1832 PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1833
1834 frameDrop = FRAMERATE_MAX; // We can allow the maximum here, because dropping is controlled
1835
1836 /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1837 => frameSkip = 4;
1838 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1839
1840 frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1841 => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1842 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1843 */
1844 errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1845 return errCode;
1846}
1847
1848
1849/*
1850 * usbvision_frames_alloc
1851 * allocate the maximum frames this driver can manage
1852 */
1853int usbvision_frames_alloc(struct usb_usbvision *usbvision)
1854{
1855 int i;
1856
1857 /* Allocate memory for the frame buffers */
1858 usbvision->max_frame_size = MAX_FRAME_SIZE;
1859 usbvision->fbuf_size = USBVISION_NUMFRAMES * usbvision->max_frame_size;
1860 usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size);
1861
1862 if(usbvision->fbuf == NULL) {
1863 err("%s: unable to allocate %d bytes for fbuf ",
1864 __FUNCTION__, usbvision->fbuf_size);
1865 return -ENOMEM;
1866 }
1867 spin_lock_init(&usbvision->queue_lock);
1868 init_waitqueue_head(&usbvision->wait_frame);
1869 init_waitqueue_head(&usbvision->wait_stream);
1870
1871 /* Allocate all buffers */
1872 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1873 usbvision->frame[i].index = i;
1874 usbvision->frame[i].grabstate = FrameState_Unused;
1875 usbvision->frame[i].data = usbvision->fbuf +
1876 i * usbvision->max_frame_size;
1877 /*
1878 * Set default sizes for read operation.
1879 */
1880 usbvision->stretch_width = 1;
1881 usbvision->stretch_height = 1;
1882 usbvision->frame[i].width = usbvision->curwidth;
1883 usbvision->frame[i].height = usbvision->curheight;
1884 usbvision->frame[i].bytes_read = 0;
1885 }
1886 return 0;
1887}
1888
1889/*
1890 * usbvision_frames_free
1891 * frees memory allocated for the frames
1892 */
1893void usbvision_frames_free(struct usb_usbvision *usbvision)
1894{
1895 /* Have to free all that memory */
1896 if (usbvision->fbuf != NULL) {
1897 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1898 usbvision->fbuf = NULL;
1899 }
1900}
1901/*
1902 * usbvision_empty_framequeues()
1903 * prepare queues for incoming and outgoing frames
1904 */
1905void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1906{
1907 u32 i;
1908
1909 INIT_LIST_HEAD(&(usbvision->inqueue));
1910 INIT_LIST_HEAD(&(usbvision->outqueue));
1911
1912 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1913 usbvision->frame[i].grabstate = FrameState_Unused;
1914 usbvision->frame[i].bytes_read = 0;
1915 }
1916}
1917
1918/*
1919 * usbvision_stream_interrupt()
1920 * stops streaming
1921 */
1922int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1923{
1924 int ret = 0;
1925
1926 /* stop reading from the device */
1927
1928 usbvision->streaming = Stream_Interrupt;
1929 ret = wait_event_timeout(usbvision->wait_stream,
1930 (usbvision->streaming == Stream_Idle),
1931 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1932 return ret;
1933}
1934
1935/*
1936 * usbvision_set_compress_params()
1937 *
1938 */
1939
1940static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1941{
1942 static const char proc[] = "usbvision_set_compresion_params: ";
1943 int rc;
1944 unsigned char value[6];
1945
1946 value[0] = 0x0F; // Intra-Compression cycle
1947 value[1] = 0x01; // Reg.45 one line per strip
1948 value[2] = 0x00; // Reg.46 Force intra mode on all new frames
1949 value[3] = 0x00; // Reg.47 FORCE_UP <- 0 normal operation (not force)
1950 value[4] = 0xA2; // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
1951 value[5] = 0x00; // Reg.49 DVI_YUV This has nothing to do with compression
1952
1953 //catched values for NT1004
1954 // value[0] = 0xFF; // Never apply intra mode automatically
1955 // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
1956 // value[2] = 0x01; // Force intra mode on all new frames
1957 // value[3] = 0x00; // Strip size 400 Bytes; do not force up
1958 // value[4] = 0xA2; //
1959 if (!USBVISION_IS_OPERATIONAL(usbvision))
1960 return 0;
1961
1962 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1963 USBVISION_OP_CODE,
1964 USB_DIR_OUT | USB_TYPE_VENDOR |
1965 USB_RECIP_ENDPOINT, 0,
1966 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1967
1968 if (rc < 0) {
1969 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1970 "reconnect or reload driver.\n", proc, rc);
1971 return rc;
1972 }
1973
1974 if (usbvision->bridgeType == BRIDGE_NT1004) {
1975 value[0] = 20; // PCM Threshold 1
1976 value[1] = 12; // PCM Threshold 2
1977 value[2] = 255; // Distorsion Threshold inter
1978 value[3] = 255; // Distorsion Threshold intra
1979 value[4] = 43; // Max Distorsion inter
1980 value[5] = 43; // Max Distorsion intra
1981 }
1982 else {
1983 value[0] = 20; // PCM Threshold 1
1984 value[1] = 12; // PCM Threshold 2
1985 value[2] = 255; // Distorsion Threshold d7-d0
1986 value[3] = 0; // Distorsion Threshold d11-d8
1987 value[4] = 43; // Max Distorsion d7-d0
1988 value[5] = 0; // Max Distorsion d8
1989 }
1990
1991 if (!USBVISION_IS_OPERATIONAL(usbvision))
1992 return 0;
1993
1994 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1995 USBVISION_OP_CODE,
1996 USB_DIR_OUT | USB_TYPE_VENDOR |
1997 USB_RECIP_ENDPOINT, 0,
1998 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
1999
2000 if (rc < 0) {
2001 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2002 "reconnect or reload driver.\n", proc, rc);
2003 return rc;
2004 }
2005
2006
2007 return rc;
2008}
2009
2010
2011/*
2012 * usbvision_set_input()
2013 *
2014 * Set the input (saa711x, ...) size x y and other misc input params
2015 * I've no idea if this parameters are right
2016 *
2017 */
2018int usbvision_set_input(struct usb_usbvision *usbvision)
2019{
2020 static const char proc[] = "usbvision_set_input: ";
2021 int rc;
2022 unsigned char value[8];
2023 unsigned char dvi_yuv_value;
2024
2025 if (!USBVISION_IS_OPERATIONAL(usbvision))
2026 return 0;
2027
2028 /* Set input format expected from decoder*/
2029 if (usbvision_device_data[usbvision->DevModel].Vin_Reg1 >= 0) {
2030 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1 & 0xff;
2031 } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2032 /* SAA7113 uses 8 bit output */
2033 value[0] = USBVISION_8_422_SYNC;
2034 } else {
2035 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2036 * as that is how saa7111 is configured */
2037 value[0] = USBVISION_16_422_SYNC;
2038 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2039 }
2040
2041 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2042 if (rc < 0) {
2043 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2044 "reconnect or reload driver.\n", proc, rc);
2045 return rc;
2046 }
2047
2048
2049 if (usbvision->tvnorm->id & V4L2_STD_PAL) {
2050 value[0] = 0xC0;
2051 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2052 value[2] = 0x20;
2053 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2054 value[4] = 0x60;
2055 value[5] = 0x00; //0x0060 -> 96 Input video h offset
2056 value[6] = 0x16;
2057 value[7] = 0x00; //0x0016 -> 22 Input video v offset
2058 } else if (usbvision->tvnorm->id & V4L2_STD_SECAM) {
2059 value[0] = 0xC0;
2060 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2061 value[2] = 0x20;
2062 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2063 value[4] = 0x01;
2064 value[5] = 0x00; //0x0001 -> 01 Input video h offset
2065 value[6] = 0x01;
2066 value[7] = 0x00; //0x0001 -> 01 Input video v offset
2067 } else { /* V4L2_STD_NTSC */
2068 value[0] = 0xD0;
2069 value[1] = 0x02; //0x02D0 -> 720 Input video line length
2070 value[2] = 0xF0;
2071 value[3] = 0x00; //0x00F0 -> 240 Input video number of lines
2072 value[4] = 0x50;
2073 value[5] = 0x00; //0x0050 -> 80 Input video h offset
2074 value[6] = 0x10;
2075 value[7] = 0x00; //0x0010 -> 16 Input video v offset
2076 }
2077
2078 if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2079 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2080 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2081 }
2082
2083 if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2084 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2085 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2086 }
2087
2088 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2089 USBVISION_OP_CODE, /* USBVISION specific code */
2090 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2091 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2092 if (rc < 0) {
2093 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2094 "reconnect or reload driver.\n", proc, rc);
2095 return rc;
2096 }
2097
2098
2099 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2100
2101 if(usbvision_device_data[usbvision->DevModel].Dvi_yuv >= 0){
2102 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv & 0xff;
2103 }
2104 else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2105 /* This changes as the fine sync control changes. Further investigation necessary */
2106 dvi_yuv_value = 0x06;
2107 }
2108
2109 return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2110}
2111
2112
2113/*
2114 * usbvision_set_dram_settings()
2115 *
2116 * Set the buffer address needed by the usbvision dram to operate
2117 * This values has been taken with usbsnoop.
2118 *
2119 */
2120
2121static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2122{
2123 int rc;
2124 unsigned char value[8];
2125
2126 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2127 value[0] = 0x42;
2128 value[1] = 0x71;
2129 value[2] = 0xff;
2130 value[3] = 0x00;
2131 value[4] = 0x98;
2132 value[5] = 0xe0;
2133 value[6] = 0x71;
2134 value[7] = 0xff;
2135 // UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2136 // FDL: 0x00000-0x0E099 = 57498 Words
2137 // VDW: 0x0E3FF-0x3FFFF
2138 }
2139 else {
2140 value[0] = 0x42;
2141 value[1] = 0x00;
2142 value[2] = 0xff;
2143 value[3] = 0x00;
2144 value[4] = 0x00;
2145 value[5] = 0x00;
2146 value[6] = 0x00;
2147 value[7] = 0xff;
2148 }
2149 /* These are the values of the address of the video buffer,
2150 * they have to be loaded into the USBVISION_DRM_PRM1-8
2151 *
2152 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2153 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2154 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2155 * Only used in compressed mode
2156 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2157 * Only used in compressed mode
2158 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2159 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2160 */
2161
2162 if (!USBVISION_IS_OPERATIONAL(usbvision))
2163 return 0;
2164
2165 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2166 USBVISION_OP_CODE, /* USBVISION specific code */
2167 USB_DIR_OUT | USB_TYPE_VENDOR |
2168 USB_RECIP_ENDPOINT, 0,
2169 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2170
2171 if (rc < 0) {
2172 err("%sERROR=%d", __FUNCTION__, rc);
2173 return rc;
2174 }
2175
2176 /* Restart the video buffer logic */
2177 if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2178 USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2179 return rc;
2180 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2181
2182 return rc;
2183}
2184
2185/*
2186 * ()
2187 *
2188 * Power on the device, enables suspend-resume logic
2189 * & reset the isoc End-Point
2190 *
2191 */
2192
2193int usbvision_power_on(struct usb_usbvision *usbvision)
2194{
2195 int errCode = 0;
2196
2197 PDEBUG(DBG_FUNC, "");
2198
2199 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2200 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2201 USBVISION_SSPND_EN | USBVISION_RES2);
2202 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2203 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2204 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2205 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2206 if (errCode == 1) {
2207 usbvision->power = 1;
2208 }
2209 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2210 return errCode;
2211}
2212
2213
2214/*
2215 * usbvision timer stuff
2216 */
2217
2218// to call usbvision_power_off from task queue
2219static void call_usbvision_power_off(struct work_struct *work)
2220{
2221 struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2222
2223 PDEBUG(DBG_FUNC, "");
2224 down_interruptible(&usbvision->lock);
2225 if(usbvision->user == 0) {
2226 usbvision_i2c_usb_del_bus(&usbvision->i2c_adap);
2227
2228 usbvision_power_off(usbvision);
2229 usbvision->initialized = 0;
2230 }
2231 up(&usbvision->lock);
2232}
2233
2234static void usbvision_powerOffTimer(unsigned long data)
2235{
2236 struct usb_usbvision *usbvision = (void *) data;
2237
2238 PDEBUG(DBG_FUNC, "");
2239 del_timer(&usbvision->powerOffTimer);
2240 INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2241 (void) schedule_work(&usbvision->powerOffWork);
2242
2243}
2244
2245void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2246{
2247 init_timer(&usbvision->powerOffTimer);
2248 usbvision->powerOffTimer.data = (long) usbvision;
2249 usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2250}
2251
2252void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2253{
2254 mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2255}
2256
2257void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2258{
2259 if (timer_pending(&usbvision->powerOffTimer)) {
2260 del_timer(&usbvision->powerOffTimer);
2261 }
2262}
2263
2264/*
2265 * usbvision_begin_streaming()
2266 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2267 * idea about the rest
2268 */
2269int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2270{
2271 int errCode = 0;
2272
2273 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2274 usbvision_init_compression(usbvision);
2275 }
2276 errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2277 usbvision->Vin_Reg2_Preset);
2278 return errCode;
2279}
2280
2281/*
2282 * usbvision_restart_isoc()
2283 * Not sure yet if touching here PWR_REG make loose the config
2284 */
2285
2286int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2287{
2288 int ret;
2289
2290 if (
2291 (ret =
2292 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2293 USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2294 return ret;
2295 if (
2296 (ret =
2297 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2298 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2299 USBVISION_RES2)) < 0)
2300 return ret;
2301 if (
2302 (ret =
2303 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2304 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2305 usbvision->Vin_Reg2_Preset)) < 0) return ret;
2306
2307 /* TODO: schedule timeout */
2308 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) && 0x01) != 1);
2309
2310 return 0;
2311}
2312
2313int usbvision_audio_off(struct usb_usbvision *usbvision)
2314{
2315 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2316 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2317 return -1;
2318 }
2319 usbvision->AudioMute = 0;
2320 usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2321 return 0;
2322}
2323
2324int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2325{
2326 if (!usbvision->AudioMute) {
2327 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2328 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2329 return -1;
2330 }
2331 }
2332 usbvision->AudioChannel = AudioChannel;
2333 return 0;
2334}
2335
2336int usbvision_setup(struct usb_usbvision *usbvision,int format)
2337{
2338 usbvision_set_video_format(usbvision, format);
2339 usbvision_set_dram_settings(usbvision);
2340 usbvision_set_compress_params(usbvision);
2341 usbvision_set_input(usbvision);
2342 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2343 usbvision_restart_isoc(usbvision);
2344
2345 /* cosas del PCM */
2346 return USBVISION_IS_OPERATIONAL(usbvision);
2347}
2348
2349
2350int usbvision_sbuf_alloc(struct usb_usbvision *usbvision)
2351{
2352 int i, errCode = 0;
2353 const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
2354
2355 /* Clean pointers so we know if we allocated something */
2356 for (i = 0; i < USBVISION_NUMSBUF; i++)
2357 usbvision->sbuf[i].data = NULL;
2358
2359 for (i = 0; i < USBVISION_NUMSBUF; i++) {
2360 usbvision->sbuf[i].data = kzalloc(sb_size, GFP_KERNEL);
2361 if (usbvision->sbuf[i].data == NULL) {
2362 err("%s: unable to allocate %d bytes for sbuf", __FUNCTION__, sb_size);
2363 errCode = -ENOMEM;
2364 break;
2365 }
2366 }
2367 return errCode;
2368}
2369
2370
2371void usbvision_sbuf_free(struct usb_usbvision *usbvision)
2372{
2373 int i;
2374
2375 for (i = 0; i < USBVISION_NUMSBUF; i++) {
2376 if (usbvision->sbuf[i].data != NULL) {
2377 kfree(usbvision->sbuf[i].data);
2378 usbvision->sbuf[i].data = NULL;
2379 }
2380 }
2381}
2382
2383/*
2384 * usbvision_init_isoc()
2385 *
2386 */
2387int usbvision_init_isoc(struct usb_usbvision *usbvision)
2388{
2389 struct usb_device *dev = usbvision->dev;
2390 int bufIdx, errCode, regValue;
2391
2392 if (!USBVISION_IS_OPERATIONAL(usbvision))
2393 return -EFAULT;
2394
2395 usbvision->curFrame = NULL;
2396 scratch_reset(usbvision);
2397
2398 /* Alternate interface 1 is is the biggest frame size */
2399 errCode = usb_set_interface(dev, usbvision->iface, usbvision->ifaceAltActive);
2400 if (errCode < 0) {
2401 usbvision->last_error = errCode;
2402 return -EBUSY;
2403 }
2404
2405 regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2406 usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1;
2407 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize);
2408
2409 usbvision->usb_bandwidth = regValue >> 1;
2410 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2411
2412
2413
2414 /* We double buffer the Iso lists */
2415
2416 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2417 int j, k;
2418 struct urb *urb;
2419
2420 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2421 if (urb == NULL) {
2422 err("%s: usb_alloc_urb() failed", __FUNCTION__);
2423 return -ENOMEM;
2424 }
2425 usbvision->sbuf[bufIdx].urb = urb;
2426 urb->dev = dev;
2427 urb->context = usbvision;
2428 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2429 urb->transfer_flags = URB_ISO_ASAP;
2430 urb->interval = 1;
2431 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2432 urb->complete = usbvision_isocIrq;
2433 urb->number_of_packets = USBVISION_URB_FRAMES;
2434 urb->transfer_buffer_length =
2435 usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2436 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2437 k += usbvision->isocPacketSize) {
2438 urb->iso_frame_desc[j].offset = k;
2439 urb->iso_frame_desc[j].length = usbvision->isocPacketSize;
2440 }
2441 }
2442
2443
2444 /* Submit all URBs */
2445 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2446 errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb, GFP_KERNEL);
2447 if (errCode) {
2448 err("%s: usb_submit_urb(%d) failed: error %d", __FUNCTION__, bufIdx, errCode);
2449 }
2450 }
2451
2452 usbvision->streaming = Stream_Idle;
2453 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", __FUNCTION__, usbvision->video_endp);
2454 return 0;
2455}
2456
2457/*
2458 * usbvision_stop_isoc()
2459 *
2460 * This procedure stops streaming and deallocates URBs. Then it
2461 * activates zero-bandwidth alt. setting of the video interface.
2462 *
2463 */
2464void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2465{
2466 int bufIdx, errCode, regValue;
2467
2468 if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2469 return;
2470
2471 /* Unschedule all of the iso td's */
2472 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2473 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2474 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2475 usbvision->sbuf[bufIdx].urb = NULL;
2476 }
2477
2478
2479 PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __FUNCTION__);
2480 usbvision->streaming = Stream_Off;
2481
2482 if (!usbvision->remove_pending) {
2483
2484 /* Set packet size to 0 */
2485 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2486 usbvision->ifaceAltInactive);
2487 if (errCode < 0) {
2488 err("%s: usb_set_interface() failed: error %d", __FUNCTION__, errCode);
2489 usbvision->last_error = errCode;
2490 }
2491 regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2492 usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1;
2493 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize);
2494
2495 usbvision->usb_bandwidth = regValue >> 1;
2496 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2497 }
2498}
2499
2500int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2501{
2502 int mode[4];
2503 int audio[]= {1, 0, 0, 0};
2504 struct v4l2_routing route;
2505 //channel 0 is TV with audiochannel 1 (tuner mono)
2506 //channel 1 is Composite with audio channel 0 (line in)
2507 //channel 2 is S-Video with audio channel 0 (line in)
2508 //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2509
2510 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2511 usbvision->ctl_input = channel;
2512 route.input = SAA7115_COMPOSITE1;
2513 call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2514 call_i2c_clients(usbvision, VIDIOC_S_INPUT, &usbvision->ctl_input);
2515
2516 // set the new channel
2517 // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2518 // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2519
2520 switch (usbvision_device_data[usbvision->DevModel].Codec) {
2521 case CODEC_SAA7113:
2522 if (SwitchSVideoInput) { // To handle problems with S-Video Input for some devices. Use SwitchSVideoInput parameter when loading the module.
2523 mode[2] = 1;
2524 }
2525 else {
2526 mode[2] = 7;
2527 }
2528 if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) {
2529 mode[0] = 0; mode[1] = 2; mode[3] = 3; // Special for four input devices
2530 }
2531 else {
2532 mode[0] = 0; mode[1] = 2; //modes for regular saa7113 devices
2533 }
2534 break;
2535 case CODEC_SAA7111:
2536 mode[0] = 0; mode[1] = 1; mode[2] = 7; //modes for saa7111
2537 break;
2538 default:
2539 mode[0] = 0; mode[1] = 1; mode[2] = 7; //default modes
2540 }
2541 route.input = mode[channel];
2542 call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2543 usbvision->channel = channel;
2544 usbvision_set_audio(usbvision, audio[channel]);
2545 return 0;
2546}
2547
2548/*
2549 * Overrides for Emacs so that we follow Linus's tabbing style.
2550 * ---------------------------------------------------------------------------
2551 * Local variables:
2552 * c-basic-offset: 8
2553 * End:
2554 */
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-05 05:44:54 -0400