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V4L/DVB (6715): ivtv: Remove unnecessary register update
[linux-2.6/verdex.git] / drivers / media / video / usbvision / usbvision-core.c
blob2038d409f1dc66702c202f3b8baafe737352c204
1 /*
2 * usbvision-core.c - driver for NT100x USB video capture devices
3 *
4 *
5 * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
6 * Dwaine Garden <dwainegarden@rogers.com>
7 *
8 * This module is part of usbvision driver project.
9 * Updates to driver completed by Dwaine P. Garden
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 */
25
26 #include <linux/kernel.h>
27 #include <linux/list.h>
28 #include <linux/timer.h>
29 #include <linux/slab.h>
30 #include <linux/mm.h>
31 #include <linux/utsname.h>
32 #include <linux/highmem.h>
33 #include <linux/videodev.h>
34 #include <linux/vmalloc.h>
35 #include <linux/module.h>
36 #include <linux/init.h>
37 #include <linux/spinlock.h>
38 #include <asm/io.h>
39 #include <linux/videodev2.h>
40 #include <linux/video_decoder.h>
41 #include <linux/i2c.h>
42
43 #include <media/saa7115.h>
44 #include <media/v4l2-common.h>
45 #include <media/tuner.h>
46 #include <media/audiochip.h>
47
48 #include <linux/workqueue.h>
49
50 #ifdef CONFIG_KMOD
51 #include <linux/kmod.h>
52 #endif
53
54 #include "usbvision.h"
55
56 static unsigned int core_debug = 0;
57 module_param(core_debug,int,0644);
58 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
59
60 static unsigned int force_testpattern = 0;
61 module_param(force_testpattern,int,0644);
62 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
63
64 static int adjustCompression = 1; // Set the compression to be adaptive
65 module_param(adjustCompression, int, 0444);
66 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device. Default: 1 (On)");
67
68 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.
69 module_param(SwitchSVideoInput, int, 0444);
70 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)");
71
72 #define ENABLE_HEXDUMP 0 /* Enable if you need it */
73
74
75 #ifdef USBVISION_DEBUG
76 #define PDEBUG(level, fmt, args...) \
77 if (core_debug & (level)) info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args)
78 #else
79 #define PDEBUG(level, fmt, args...) do {} while(0)
80 #endif
81
82 #define DBG_HEADER 1<<0
83 #define DBG_IRQ 1<<1
84 #define DBG_ISOC 1<<2
85 #define DBG_PARSE 1<<3
86 #define DBG_SCRATCH 1<<4
87 #define DBG_FUNC 1<<5
88
89 static const int max_imgwidth = MAX_FRAME_WIDTH;
90 static const int max_imgheight = MAX_FRAME_HEIGHT;
91 static const int min_imgwidth = MIN_FRAME_WIDTH;
92 static const int min_imgheight = MIN_FRAME_HEIGHT;
93
94 /* The value of 'scratch_buf_size' affects quality of the picture
95 * in many ways. Shorter buffers may cause loss of data when client
96 * is too slow. Larger buffers are memory-consuming and take longer
97 * to work with. This setting can be adjusted, but the default value
98 * should be OK for most desktop users.
99 */
100 #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) // 128kB memory scratch buffer
101 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
102
103 // Function prototypes
104 static int usbvision_request_intra (struct usb_usbvision *usbvision);
105 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
106 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
107 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
108
109 /*******************************/
110 /* Memory management functions */
111 /*******************************/
112
113 /*
114 * Here we want the physical address of the memory.
115 * This is used when initializing the contents of the area.
116 */
117
118 static void *usbvision_rvmalloc(unsigned long size)
119 {
120 void *mem;
121 unsigned long adr;
122
123 size = PAGE_ALIGN(size);
124 mem = vmalloc_32(size);
125 if (!mem)
126 return NULL;
127
128 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
129 adr = (unsigned long) mem;
130 while (size > 0) {
131 SetPageReserved(vmalloc_to_page((void *)adr));
132 adr += PAGE_SIZE;
133 size -= PAGE_SIZE;
134 }
135
136 return mem;
137 }
138
139 static void usbvision_rvfree(void *mem, unsigned long size)
140 {
141 unsigned long adr;
142
143 if (!mem)
144 return;
145
146 size = PAGE_ALIGN(size);
147
148 adr = (unsigned long) mem;
149 while ((long) size > 0) {
150 ClearPageReserved(vmalloc_to_page((void *)adr));
151 adr += PAGE_SIZE;
152 size -= PAGE_SIZE;
153 }
154
155 vfree(mem);
156 }
157
158
159
160 #if ENABLE_HEXDUMP
161 static void usbvision_hexdump(const unsigned char *data, int len)
162 {
163 char tmp[80];
164 int i, k;
165
166 for (i = k = 0; len > 0; i++, len--) {
167 if (i > 0 && (i % 16 == 0)) {
168 printk("%s\n", tmp);
169 k = 0;
170 }
171 k += sprintf(&tmp[k], "%02x ", data[i]);
172 }
173 if (k > 0)
174 printk("%s\n", tmp);
175 }
176 #endif
177
178 /********************************
179 * scratch ring buffer handling
180 ********************************/
181 static int scratch_len(struct usb_usbvision *usbvision) /*This returns the amount of data actually in the buffer */
182 {
183 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
184 if (len < 0) {
185 len += scratch_buf_size;
186 }
187 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
188
189 return len;
190 }
191
192
193 /* This returns the free space left in the buffer */
194 static int scratch_free(struct usb_usbvision *usbvision)
195 {
196 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
197 if (free <= 0) {
198 free += scratch_buf_size;
199 }
200 if (free) {
201 free -= 1; /* at least one byte in the buffer must */
202 /* left blank, otherwise there is no chance to differ between full and empty */
203 }
204 PDEBUG(DBG_SCRATCH, "return %d\n", free);
205
206 return free;
207 }
208
209
210 /* This puts data into the buffer */
211 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
212 int len)
213 {
214 int len_part;
215
216 if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
217 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
218 usbvision->scratch_write_ptr += len;
219 }
220 else {
221 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
222 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
223 if (len == len_part) {
224 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */
225 }
226 else {
227 memcpy(usbvision->scratch, data + len_part, len - len_part);
228 usbvision->scratch_write_ptr = len - len_part;
229 }
230 }
231
232 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
233
234 return len;
235 }
236
237 /* This marks the write_ptr as position of new frame header */
238 static void scratch_mark_header(struct usb_usbvision *usbvision)
239 {
240 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
241
242 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
243 usbvision->scratch_write_ptr;
244 usbvision->scratch_headermarker_write_ptr += 1;
245 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
246 }
247
248 /* This gets data from the buffer at the given "ptr" position */
249 static int scratch_get_extra(struct usb_usbvision *usbvision,
250 unsigned char *data, int *ptr, int len)
251 {
252 int len_part;
253 if (*ptr + len < scratch_buf_size) {
254 memcpy(data, usbvision->scratch + *ptr, len);
255 *ptr += len;
256 }
257 else {
258 len_part = scratch_buf_size - *ptr;
259 memcpy(data, usbvision->scratch + *ptr, len_part);
260 if (len == len_part) {
261 *ptr = 0; /* just set the y_ptr to zero */
262 }
263 else {
264 memcpy(data + len_part, usbvision->scratch, len - len_part);
265 *ptr = len - len_part;
266 }
267 }
268
269 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
270
271 return len;
272 }
273
274
275 /* This sets the scratch extra read pointer */
276 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
277 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 */
286 static void 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 */
295 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
296 int len)
297 {
298 int len_part;
299 if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
300 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
301 usbvision->scratch_read_ptr += len;
302 }
303 else {
304 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
305 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
306 if (len == len_part) {
307 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */
308 }
309 else {
310 memcpy(data + len_part, usbvision->scratch, len - len_part);
311 usbvision->scratch_read_ptr = len - len_part;
312 }
313 }
314
315 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
316
317 return len;
318 }
319
320
321 /* This sets read pointer to next header and returns it */
322 static int scratch_get_header(struct usb_usbvision *usbvision,
323 struct usbvision_frame_header *header)
324 {
325 int errCode = 0;
326
327 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
328
329 while (usbvision->scratch_headermarker_write_ptr -
330 usbvision->scratch_headermarker_read_ptr != 0) {
331 usbvision->scratch_read_ptr =
332 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
333 usbvision->scratch_headermarker_read_ptr += 1;
334 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
335 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
336 if ((header->magic_1 == USBVISION_MAGIC_1)
337 && (header->magic_2 == USBVISION_MAGIC_2)
338 && (header->headerLength == USBVISION_HEADER_LENGTH)) {
339 errCode = USBVISION_HEADER_LENGTH;
340 header->frameWidth = header->frameWidthLo + (header->frameWidthHi << 8);
341 header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
342 break;
343 }
344 }
345
346 return errCode;
347 }
348
349
350 /*This removes len bytes of old data from the buffer */
351 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
352 {
353
354 usbvision->scratch_read_ptr += len;
355 usbvision->scratch_read_ptr %= scratch_buf_size;
356 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
357 }
358
359
360 /*This resets the buffer - kills all data in it too */
361 static void scratch_reset(struct usb_usbvision *usbvision)
362 {
363 PDEBUG(DBG_SCRATCH, "\n");
364
365 usbvision->scratch_read_ptr = 0;
366 usbvision->scratch_write_ptr = 0;
367 usbvision->scratch_headermarker_read_ptr = 0;
368 usbvision->scratch_headermarker_write_ptr = 0;
369 usbvision->isocstate = IsocState_NoFrame;
370 }
371
372 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
373 {
374 usbvision->scratch = vmalloc_32(scratch_buf_size);
375 scratch_reset(usbvision);
376 if(usbvision->scratch == NULL) {
377 err("%s: unable to allocate %d bytes for scratch",
378 __FUNCTION__, scratch_buf_size);
379 return -ENOMEM;
380 }
381 return 0;
382 }
383
384 void usbvision_scratch_free(struct usb_usbvision *usbvision)
385 {
386 if (usbvision->scratch != NULL) {
387 vfree(usbvision->scratch);
388 usbvision->scratch = NULL;
389 }
390 }
391
392 /*
393 * usbvision_testpattern()
394 *
395 * Procedure forms a test pattern (yellow grid on blue background).
396 *
397 * Parameters:
398 * fullframe: if TRUE then entire frame is filled, otherwise the procedure
399 * continues from the current scanline.
400 * pmode 0: fill the frame with solid blue color (like on VCR or TV)
401 * 1: Draw a colored grid
402 *
403 */
404 static void usbvision_testpattern(struct usb_usbvision *usbvision,
405 int fullframe, int pmode)
406 {
407 static const char proc[] = "usbvision_testpattern";
408 struct usbvision_frame *frame;
409 unsigned char *f;
410 int num_cell = 0;
411 int scan_length = 0;
412 static int num_pass = 0;
413
414 if (usbvision == NULL) {
415 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
416 return;
417 }
418 if (usbvision->curFrame == NULL) {
419 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
420 return;
421 }
422
423 /* Grab the current frame */
424 frame = usbvision->curFrame;
425
426 /* Optionally start at the beginning */
427 if (fullframe) {
428 frame->curline = 0;
429 frame->scanlength = 0;
430 }
431
432 /* Form every scan line */
433 for (; frame->curline < frame->frmheight; frame->curline++) {
434 int i;
435
436 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
437 for (i = 0; i < usbvision->curwidth; i++) {
438 unsigned char cb = 0x80;
439 unsigned char cg = 0;
440 unsigned char cr = 0;
441
442 if (pmode == 1) {
443 if (frame->curline % 32 == 0)
444 cb = 0, cg = cr = 0xFF;
445 else if (i % 32 == 0) {
446 if (frame->curline % 32 == 1)
447 num_cell++;
448 cb = 0, cg = cr = 0xFF;
449 } else {
450 cb =
451 ((num_cell * 7) +
452 num_pass) & 0xFF;
453 cg =
454 ((num_cell * 5) +
455 num_pass * 2) & 0xFF;
456 cr =
457 ((num_cell * 3) +
458 num_pass * 3) & 0xFF;
459 }
460 } else {
461 /* Just the blue screen */
462 }
463
464 *f++ = cb;
465 *f++ = cg;
466 *f++ = cr;
467 scan_length += 3;
468 }
469 }
470
471 frame->grabstate = FrameState_Done;
472 frame->scanlength += scan_length;
473 ++num_pass;
474
475 }
476
477 /*
478 * usbvision_decompress_alloc()
479 *
480 * allocates intermediate buffer for decompression
481 */
482 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
483 {
484 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
485 usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
486 if (usbvision->IntraFrameBuffer == NULL) {
487 err("%s: unable to allocate %d for compr. frame buffer", __FUNCTION__, IFB_size);
488 return -ENOMEM;
489 }
490 return 0;
491 }
492
493 /*
494 * usbvision_decompress_free()
495 *
496 * frees intermediate buffer for decompression
497 */
498 void usbvision_decompress_free(struct usb_usbvision *usbvision)
499 {
500 if (usbvision->IntraFrameBuffer != NULL) {
501 vfree(usbvision->IntraFrameBuffer);
502 usbvision->IntraFrameBuffer = NULL;
503 }
504 }
505
506 /************************************************************
507 * Here comes the data parsing stuff that is run as interrupt
508 ************************************************************/
509 /*
510 * usbvision_find_header()
511 *
512 * Locate one of supported header markers in the scratch buffer.
513 */
514 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
515 {
516 struct usbvision_frame *frame;
517 int foundHeader = 0;
518
519 frame = usbvision->curFrame;
520
521 while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
522 // found header in scratch
523 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
524 frame->isocHeader.magic_2,
525 frame->isocHeader.magic_1,
526 frame->isocHeader.headerLength,
527 frame->isocHeader.frameNum,
528 frame->isocHeader.framePhase,
529 frame->isocHeader.frameLatency,
530 frame->isocHeader.dataFormat,
531 frame->isocHeader.formatParam,
532 frame->isocHeader.frameWidth,
533 frame->isocHeader.frameHeight);
534
535 if (usbvision->requestIntra) {
536 if (frame->isocHeader.formatParam & 0x80) {
537 foundHeader = 1;
538 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
539 usbvision_unrequest_intra(usbvision);
540 break;
541 }
542 }
543 else {
544 foundHeader = 1;
545 break;
546 }
547 }
548
549 if (foundHeader) {
550 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
551 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
552 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
553 }
554 else { // no header found
555 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
556 scratch_reset(usbvision);
557 return ParseState_EndParse;
558 }
559
560 // found header
561 if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
562 //check isocHeader.frameNum for lost frames
563 if (usbvision->lastIsocFrameNum >= 0) {
564 if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
565 // unexpected frame drop: need to request new intra frame
566 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
567 usbvision_request_intra(usbvision);
568 return ParseState_NextFrame;
569 }
570 }
571 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
572 }
573 usbvision->header_count++;
574 frame->scanstate = ScanState_Lines;
575 frame->curline = 0;
576
577 if (force_testpattern) {
578 usbvision_testpattern(usbvision, 1, 1);
579 return ParseState_NextFrame;
580 }
581 return ParseState_Continue;
582 }
583
584 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
585 long *pcopylen)
586 {
587 volatile struct usbvision_frame *frame;
588 unsigned char *f;
589 int len;
590 int i;
591 unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
592 unsigned char rv, gv, bv; // RGB components
593 int clipmask_index, bytes_per_pixel;
594 int stretch_bytes, clipmask_add;
595
596 frame = usbvision->curFrame;
597 f = frame->data + (frame->v4l2_linesize * frame->curline);
598
599 /* Make sure there's enough data for the entire line */
600 len = (frame->isocHeader.frameWidth * 2)+5;
601 if (scratch_len(usbvision) < len) {
602 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
603 return ParseState_Out;
604 }
605
606 if ((frame->curline + 1) >= frame->frmheight) {
607 return ParseState_NextFrame;
608 }
609
610 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
611 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
612 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
613 clipmask_add = usbvision->stretch_width;
614
615 for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
616
617 scratch_get(usbvision, &yuyv[0], 4);
618
619 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
620 *f++ = yuyv[0]; // Y
621 *f++ = yuyv[3]; // U
622 }
623 else {
624
625 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
626 switch (frame->v4l2_format.format) {
627 case V4L2_PIX_FMT_RGB565:
628 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
629 *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv);
630 break;
631 case V4L2_PIX_FMT_RGB24:
632 *f++ = bv;
633 *f++ = gv;
634 *f++ = rv;
635 break;
636 case V4L2_PIX_FMT_RGB32:
637 *f++ = bv;
638 *f++ = gv;
639 *f++ = rv;
640 f++;
641 break;
642 case V4L2_PIX_FMT_RGB555:
643 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
644 *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
645 break;
646 }
647 }
648 clipmask_index += clipmask_add;
649 f += stretch_bytes;
650
651 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
652 *f++ = yuyv[2]; // Y
653 *f++ = yuyv[1]; // V
654 }
655 else {
656
657 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
658 switch (frame->v4l2_format.format) {
659 case V4L2_PIX_FMT_RGB565:
660 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
661 *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv);
662 break;
663 case V4L2_PIX_FMT_RGB24:
664 *f++ = bv;
665 *f++ = gv;
666 *f++ = rv;
667 break;
668 case V4L2_PIX_FMT_RGB32:
669 *f++ = bv;
670 *f++ = gv;
671 *f++ = rv;
672 f++;
673 break;
674 case V4L2_PIX_FMT_RGB555:
675 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
676 *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
677 break;
678 }
679 }
680 clipmask_index += clipmask_add;
681 f += stretch_bytes;
682 }
683
684 frame->curline += usbvision->stretch_height;
685 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
686
687 if (frame->curline >= frame->frmheight) {
688 return ParseState_NextFrame;
689 }
690 else {
691 return ParseState_Continue;
692 }
693 }
694
695 /* The decompression routine */
696 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
697 unsigned char *Decompressed, int *StartPos,
698 int *BlockTypeStartPos, int Len)
699 {
700 int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
701 unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
702
703 Integrator = 0;
704 Pos = *StartPos;
705 BlockTypePos = *BlockTypeStartPos;
706 MaxPos = 396; //Pos + Len;
707 ExtraPos = Pos;
708 BlockLen = 0;
709 BlockByte = 0;
710 BlockCode = 0;
711 BlockType = 0;
712 BlockTypeByte = 0;
713 BlockTypeLen = 0;
714 RestPixel = Len;
715
716 for (Idx = 0; Idx < Len; Idx++) {
717
718 if (BlockLen == 0) {
719 if (BlockTypeLen==0) {
720 BlockTypeByte = Compressed[BlockTypePos];
721 BlockTypePos++;
722 BlockTypeLen = 4;
723 }
724 BlockType = (BlockTypeByte & 0xC0) >> 6;
725
726 //statistic:
727 usbvision->ComprBlockTypes[BlockType]++;
728
729 Pos = ExtraPos;
730 if (BlockType == 0) {
731 if(RestPixel >= 24) {
732 Idx += 23;
733 RestPixel -= 24;
734 Integrator = Decompressed[Idx];
735 } else {
736 Idx += RestPixel - 1;
737 RestPixel = 0;
738 }
739 } else {
740 BlockCode = Compressed[Pos];
741 Pos++;
742 if (RestPixel >= 24) {
743 BlockLen = 24;
744 } else {
745 BlockLen = RestPixel;
746 }
747 RestPixel -= BlockLen;
748 ExtraPos = Pos + (BlockLen / 4);
749 }
750 BlockTypeByte <<= 2;
751 BlockTypeLen -= 1;
752 }
753 if (BlockLen > 0) {
754 if ((BlockLen%4) == 0) {
755 BlockByte = Compressed[Pos];
756 Pos++;
757 }
758 if (BlockType == 1) { //inter Block
759 Integrator = Decompressed[Idx];
760 }
761 switch (BlockByte & 0xC0) {
762 case 0x03<<6:
763 Integrator += Compressed[ExtraPos];
764 ExtraPos++;
765 break;
766 case 0x02<<6:
767 Integrator += BlockCode;
768 break;
769 case 0x00:
770 Integrator -= BlockCode;
771 break;
772 }
773 Decompressed[Idx] = Integrator;
774 BlockByte <<= 2;
775 BlockLen -= 1;
776 }
777 }
778 *StartPos = ExtraPos;
779 *BlockTypeStartPos = BlockTypePos;
780 return Idx;
781 }
782
783
784 /*
785 * usbvision_parse_compress()
786 *
787 * Parse compressed frame from the scratch buffer, put
788 * decoded RGB value into the current frame buffer and add the written
789 * number of bytes (RGB) to the *pcopylen.
790 *
791 */
792 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
793 long *pcopylen)
794 {
795 #define USBVISION_STRIP_MAGIC 0x5A
796 #define USBVISION_STRIP_LEN_MAX 400
797 #define USBVISION_STRIP_HEADER_LEN 3
798
799 struct usbvision_frame *frame;
800 unsigned char *f,*u = NULL ,*v = NULL;
801 unsigned char StripData[USBVISION_STRIP_LEN_MAX];
802 unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
803 int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
804 int clipmask_index, bytes_per_pixel, rc;
805 int imageSize;
806 unsigned char rv, gv, bv;
807 static unsigned char *Y, *U, *V;
808
809 frame = usbvision->curFrame;
810 imageSize = frame->frmwidth * frame->frmheight;
811 if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
812 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) { // this is a planar format
813 //... v4l2_linesize not used here.
814 f = frame->data + (frame->width * frame->curline);
815 } else
816 f = frame->data + (frame->v4l2_linesize * frame->curline);
817
818 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
819 // get base of u and b planes add halfoffset
820
821 u = frame->data
822 + imageSize
823 + (frame->frmwidth >>1) * frame->curline ;
824 v = u + (imageSize >>1 );
825
826 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
827
828 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
829 u = v + (imageSize >>2) ;
830 }
831
832 if (frame->curline == 0) {
833 usbvision_adjust_compression(usbvision);
834 }
835
836 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
837 return ParseState_Out;
838 }
839
840 //get strip header without changing the scratch_read_ptr
841 scratch_set_extra_ptr(usbvision, &StripPtr, 0);
842 scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
843 USBVISION_STRIP_HEADER_LEN);
844
845 if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
846 // wrong strip magic
847 usbvision->stripMagicErrors++;
848 return ParseState_NextFrame;
849 }
850
851 if (frame->curline != (int)StripHeader[2]) {
852 //line number missmatch error
853 usbvision->stripLineNumberErrors++;
854 }
855
856 StripLen = 2 * (unsigned int)StripHeader[1];
857 if (StripLen > USBVISION_STRIP_LEN_MAX) {
858 // strip overrun
859 // I think this never happens
860 usbvision_request_intra(usbvision);
861 }
862
863 if (scratch_len(usbvision) < StripLen) {
864 //there is not enough data for the strip
865 return ParseState_Out;
866 }
867
868 if (usbvision->IntraFrameBuffer) {
869 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
870 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
871 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
872 }
873 else {
874 return ParseState_NextFrame;
875 }
876
877 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
878 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
879
880 scratch_get(usbvision, StripData, StripLen);
881
882 IdxEnd = frame->frmwidth;
883 BlockTypePos = USBVISION_STRIP_HEADER_LEN;
884 StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
885 BlockPos = StartBlockPos;
886
887 usbvision->BlockPos = BlockPos;
888
889 if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
890 //return ParseState_Continue;
891 }
892 if (StripLen > usbvision->maxStripLen) {
893 usbvision->maxStripLen = StripLen;
894 }
895
896 if (frame->curline%2) {
897 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
898 //return ParseState_Continue;
899 }
900 }
901 else {
902 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
903 //return ParseState_Continue;
904 }
905 }
906
907 if (BlockPos > usbvision->comprBlockPos) {
908 usbvision->comprBlockPos = BlockPos;
909 }
910 if (BlockPos > StripLen) {
911 usbvision->stripLenErrors++;
912 }
913
914 for (Idx = 0; Idx < IdxEnd; Idx++) {
915 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
916 *f++ = Y[Idx];
917 *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
918 }
919 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
920 *f++ = Y[Idx];
921 if ( Idx & 0x01)
922 *u++ = U[Idx>>1] ;
923 else
924 *v++ = V[Idx>>1];
925 }
926 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
927 *f++ = Y [Idx];
928 if ( !(( Idx & 0x01 ) | ( frame->curline & 0x01 )) ){
929
930 /* only need do this for 1 in 4 pixels */
931 /* intraframe buffer is YUV420 format */
932
933 *u++ = U[Idx >>1];
934 *v++ = V[Idx >>1];
935 }
936
937 }
938 else {
939 YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
940 switch (frame->v4l2_format.format) {
941 case V4L2_PIX_FMT_GREY:
942 *f++ = Y[Idx];
943 break;
944 case V4L2_PIX_FMT_RGB555:
945 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
946 *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
947 break;
948 case V4L2_PIX_FMT_RGB565:
949 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
950 *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv);
951 break;
952 case V4L2_PIX_FMT_RGB24:
953 *f++ = bv;
954 *f++ = gv;
955 *f++ = rv;
956 break;
957 case V4L2_PIX_FMT_RGB32:
958 *f++ = bv;
959 *f++ = gv;
960 *f++ = rv;
961 f++;
962 break;
963 }
964 }
965 clipmask_index++;
966 }
967 /* Deal with non-integer no. of bytes for YUV420P */
968 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
969 *pcopylen += frame->v4l2_linesize;
970 else
971 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
972
973 frame->curline += 1;
974
975 if (frame->curline >= frame->frmheight) {
976 return ParseState_NextFrame;
977 }
978 else {
979 return ParseState_Continue;
980 }
981
982 }
983
984
985 /*
986 * usbvision_parse_lines_420()
987 *
988 * Parse two lines from the scratch buffer, put
989 * decoded RGB value into the current frame buffer and add the written
990 * number of bytes (RGB) to the *pcopylen.
991 *
992 */
993 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
994 long *pcopylen)
995 {
996 struct usbvision_frame *frame;
997 unsigned char *f_even = NULL, *f_odd = NULL;
998 unsigned int pixel_per_line, block;
999 int pixel, block_split;
1000 int y_ptr, u_ptr, v_ptr, y_odd_offset;
1001 const int y_block_size = 128;
1002 const int uv_block_size = 64;
1003 const int sub_block_size = 32;
1004 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
1005 const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1006 unsigned char y[2], u, v; /* YUV components */
1007 int y_, u_, v_, vb, uvg, ur;
1008 int r_, g_, b_; /* RGB components */
1009 unsigned char g;
1010 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1011 int clipmask_add, stretch_bytes;
1012
1013 frame = usbvision->curFrame;
1014 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1015 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1016
1017 /* Make sure there's enough data for the entire line */
1018 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1019 /* I need two lines to decode the color */
1020 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1021 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1022 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1023 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
1024 clipmask_add = usbvision->stretch_width;
1025 pixel_per_line = frame->isocHeader.frameWidth;
1026
1027 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1028 //printk(KERN_DEBUG "out of data, need %d\n", len);
1029 return ParseState_Out;
1030 }
1031
1032 if ((frame->curline + 1) >= frame->frmheight) {
1033 return ParseState_NextFrame;
1034 }
1035
1036 block_split = (pixel_per_line%y_block_size) ? 1 : 0; //are some blocks splitted into different lines?
1037
1038 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1039 + block_split * uv_block_size;
1040
1041 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1042 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1043 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1044 + (4 - block_split) * sub_block_size);
1045
1046 for (block = 0; block < (pixel_per_line / sub_block_size);
1047 block++) {
1048
1049
1050 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1051 scratch_get(usbvision, &y[0], 2);
1052 scratch_get_extra(usbvision, &u, &u_ptr, 1);
1053 scratch_get_extra(usbvision, &v, &v_ptr, 1);
1054
1055 //I don't use the YUV_TO_RGB macro for better performance
1056 v_ = v - 128;
1057 u_ = u - 128;
1058 vb = 132252 * v_;
1059 uvg= -53281 * u_ - 25625 * v_;
1060 ur = 104595 * u_;
1061
1062 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1063 *f_even++ = y[0];
1064 *f_even++ = v;
1065 }
1066 else {
1067 y_ = 76284 * (y[0] - 16);
1068
1069 b_ = (y_ + vb) >> 16;
1070 g_ = (y_ + uvg)>> 16;
1071 r_ = (y_ + ur) >> 16;
1072
1073 switch (frame->v4l2_format.format) {
1074 case V4L2_PIX_FMT_RGB565:
1075 g = LIMIT_RGB(g_);
1076 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1077 *f_even++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1078 break;
1079 case V4L2_PIX_FMT_RGB24:
1080 *f_even++ = LIMIT_RGB(b_);
1081 *f_even++ = LIMIT_RGB(g_);
1082 *f_even++ = LIMIT_RGB(r_);
1083 break;
1084 case V4L2_PIX_FMT_RGB32:
1085 *f_even++ = LIMIT_RGB(b_);
1086 *f_even++ = LIMIT_RGB(g_);
1087 *f_even++ = LIMIT_RGB(r_);
1088 f_even++;
1089 break;
1090 case V4L2_PIX_FMT_RGB555:
1091 g = LIMIT_RGB(g_);
1092 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1093 *f_even++ = (0x03 & ( g >> 6)) |
1094 (0x7C & (LIMIT_RGB(r_) >> 1));
1095 break;
1096 }
1097 }
1098 clipmask_even_index += clipmask_add;
1099 f_even += stretch_bytes;
1100
1101 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1102 *f_even++ = y[1];
1103 *f_even++ = u;
1104 }
1105 else {
1106 y_ = 76284 * (y[1] - 16);
1107
1108 b_ = (y_ + vb) >> 16;
1109 g_ = (y_ + uvg)>> 16;
1110 r_ = (y_ + ur) >> 16;
1111
1112 switch (frame->v4l2_format.format) {
1113 case V4L2_PIX_FMT_RGB565:
1114 g = LIMIT_RGB(g_);
1115 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1116 *f_even++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1117 break;
1118 case V4L2_PIX_FMT_RGB24:
1119 *f_even++ = LIMIT_RGB(b_);
1120 *f_even++ = LIMIT_RGB(g_);
1121 *f_even++ = LIMIT_RGB(r_);
1122 break;
1123 case V4L2_PIX_FMT_RGB32:
1124 *f_even++ = LIMIT_RGB(b_);
1125 *f_even++ = LIMIT_RGB(g_);
1126 *f_even++ = LIMIT_RGB(r_);
1127 f_even++;
1128 break;
1129 case V4L2_PIX_FMT_RGB555:
1130 g = LIMIT_RGB(g_);
1131 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1132 *f_even++ = (0x03 & ( g >> 6)) |
1133 (0x7C & (LIMIT_RGB(r_) >> 1));
1134 break;
1135 }
1136 }
1137 clipmask_even_index += clipmask_add;
1138 f_even += stretch_bytes;
1139
1140 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1141
1142 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1143 *f_odd++ = y[0];
1144 *f_odd++ = v;
1145 }
1146 else {
1147 y_ = 76284 * (y[0] - 16);
1148
1149 b_ = (y_ + vb) >> 16;
1150 g_ = (y_ + uvg)>> 16;
1151 r_ = (y_ + ur) >> 16;
1152
1153 switch (frame->v4l2_format.format) {
1154 case V4L2_PIX_FMT_RGB565:
1155 g = LIMIT_RGB(g_);
1156 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1157 *f_odd++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1158 break;
1159 case V4L2_PIX_FMT_RGB24:
1160 *f_odd++ = LIMIT_RGB(b_);
1161 *f_odd++ = LIMIT_RGB(g_);
1162 *f_odd++ = LIMIT_RGB(r_);
1163 break;
1164 case V4L2_PIX_FMT_RGB32:
1165 *f_odd++ = LIMIT_RGB(b_);
1166 *f_odd++ = LIMIT_RGB(g_);
1167 *f_odd++ = LIMIT_RGB(r_);
1168 f_odd++;
1169 break;
1170 case V4L2_PIX_FMT_RGB555:
1171 g = LIMIT_RGB(g_);
1172 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1173 *f_odd++ = (0x03 & ( g >> 6)) |
1174 (0x7C & (LIMIT_RGB(r_) >> 1));
1175 break;
1176 }
1177 }
1178 clipmask_odd_index += clipmask_add;
1179 f_odd += stretch_bytes;
1180
1181 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1182 *f_odd++ = y[1];
1183 *f_odd++ = u;
1184 }
1185 else {
1186 y_ = 76284 * (y[1] - 16);
1187
1188 b_ = (y_ + vb) >> 16;
1189 g_ = (y_ + uvg)>> 16;
1190 r_ = (y_ + ur) >> 16;
1191
1192 switch (frame->v4l2_format.format) {
1193 case V4L2_PIX_FMT_RGB565:
1194 g = LIMIT_RGB(g_);
1195 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1196 *f_odd++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1197 break;
1198 case V4L2_PIX_FMT_RGB24:
1199 *f_odd++ = LIMIT_RGB(b_);
1200 *f_odd++ = LIMIT_RGB(g_);
1201 *f_odd++ = LIMIT_RGB(r_);
1202 break;
1203 case V4L2_PIX_FMT_RGB32:
1204 *f_odd++ = LIMIT_RGB(b_);
1205 *f_odd++ = LIMIT_RGB(g_);
1206 *f_odd++ = LIMIT_RGB(r_);
1207 f_odd++;
1208 break;
1209 case V4L2_PIX_FMT_RGB555:
1210 g = LIMIT_RGB(g_);
1211 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1212 *f_odd++ = (0x03 & ( g >> 6)) |
1213 (0x7C & (LIMIT_RGB(r_) >> 1));
1214 break;
1215 }
1216 }
1217 clipmask_odd_index += clipmask_add;
1218 f_odd += stretch_bytes;
1219 }
1220
1221 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1222 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1223 * sub_block_size);
1224 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1225 * sub_block_size);
1226 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1227 * sub_block_size);
1228 }
1229
1230 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1231 + block_split * sub_block_size);
1232
1233 frame->curline += 2 * usbvision->stretch_height;
1234 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1235
1236 if (frame->curline >= frame->frmheight)
1237 return ParseState_NextFrame;
1238 else
1239 return ParseState_Continue;
1240 }
1241
1242 /*
1243 * usbvision_parse_data()
1244 *
1245 * Generic routine to parse the scratch buffer. It employs either
1246 * usbvision_find_header() or usbvision_parse_lines() to do most
1247 * of work.
1248 *
1249 */
1250 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1251 {
1252 struct usbvision_frame *frame;
1253 enum ParseState newstate;
1254 long copylen = 0;
1255 unsigned long lock_flags;
1256
1257 frame = usbvision->curFrame;
1258
1259 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1260
1261 while (1) {
1262
1263 newstate = ParseState_Out;
1264 if (scratch_len(usbvision)) {
1265 if (frame->scanstate == ScanState_Scanning) {
1266 newstate = usbvision_find_header(usbvision);
1267 }
1268 else if (frame->scanstate == ScanState_Lines) {
1269 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1270 newstate = usbvision_parse_lines_420(usbvision, &copylen);
1271 }
1272 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1273 newstate = usbvision_parse_lines_422(usbvision, &copylen);
1274 }
1275 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1276 newstate = usbvision_parse_compress(usbvision, &copylen);
1277 }
1278
1279 }
1280 }
1281 if (newstate == ParseState_Continue) {
1282 continue;
1283 }
1284 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1285 break;
1286 }
1287 else {
1288 return; /* ParseState_EndParse */
1289 }
1290 }
1291
1292 if (newstate == ParseState_NextFrame) {
1293 frame->grabstate = FrameState_Done;
1294 do_gettimeofday(&(frame->timestamp));
1295 frame->sequence = usbvision->frame_num;
1296
1297 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1298 list_move_tail(&(frame->frame), &usbvision->outqueue);
1299 usbvision->curFrame = NULL;
1300 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1301
1302 usbvision->frame_num++;
1303
1304 /* This will cause the process to request another frame. */
1305 if (waitqueue_active(&usbvision->wait_frame)) {
1306 PDEBUG(DBG_PARSE, "Wake up !");
1307 wake_up_interruptible(&usbvision->wait_frame);
1308 }
1309 }
1310 else
1311 frame->grabstate = FrameState_Grabbing;
1312
1313
1314 /* Update the frame's uncompressed length. */
1315 frame->scanlength += copylen;
1316 }
1317
1318
1319 /*
1320 * Make all of the blocks of data contiguous
1321 */
1322 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1323 struct urb *urb)
1324 {
1325 unsigned char *packet_data;
1326 int i, totlen = 0;
1327
1328 for (i = 0; i < urb->number_of_packets; i++) {
1329 int packet_len = urb->iso_frame_desc[i].actual_length;
1330 int packet_stat = urb->iso_frame_desc[i].status;
1331
1332 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1333
1334 /* Detect and ignore errored packets */
1335 if (packet_stat) { // packet_stat != 0 ?????????????
1336 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1337 usbvision->isocErrCount++;
1338 continue;
1339 }
1340
1341 /* Detect and ignore empty packets */
1342 if (packet_len < 0) {
1343 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1344 usbvision->isocSkipCount++;
1345 continue;
1346 }
1347 else if (packet_len == 0) { /* Frame end ????? */
1348 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1349 usbvision->isocstate=IsocState_NoFrame;
1350 usbvision->isocSkipCount++;
1351 continue;
1352 }
1353 else if (packet_len > usbvision->isocPacketSize) {
1354 PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1355 usbvision->isocSkipCount++;
1356 continue;
1357 }
1358
1359 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1360
1361 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1362 usbvision->isocstate=IsocState_InFrame;
1363 scratch_mark_header(usbvision);
1364 usbvision_measure_bandwidth(usbvision);
1365 PDEBUG(DBG_ISOC, "packet with header");
1366 }
1367
1368 /*
1369 * If usbvision continues to feed us with data but there is no
1370 * consumption (if, for example, V4L client fell asleep) we
1371 * may overflow the buffer. We have to move old data over to
1372 * free room for new data. This is bad for old data. If we
1373 * just drop new data then it's bad for new data... choose
1374 * your favorite evil here.
1375 */
1376 if (scratch_free(usbvision) < packet_len) {
1377
1378 usbvision->scratch_ovf_count++;
1379 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1380 scratch_len(usbvision), packet_len);
1381 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1382 }
1383
1384 /* Now we know that there is enough room in scratch buffer */
1385 scratch_put(usbvision, packet_data, packet_len);
1386 totlen += packet_len;
1387 usbvision->isocDataCount += packet_len;
1388 usbvision->isocPacketCount++;
1389 }
1390 #if ENABLE_HEXDUMP
1391 if (totlen > 0) {
1392 static int foo = 0;
1393 if (foo < 1) {
1394 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1395 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1396 ++foo;
1397 }
1398 }
1399 #endif
1400 return totlen;
1401 }
1402
1403 static void usbvision_isocIrq(struct urb *urb)
1404 {
1405 int errCode = 0;
1406 int len;
1407 struct usb_usbvision *usbvision = urb->context;
1408 int i;
1409 unsigned long startTime = jiffies;
1410 struct usbvision_frame **f;
1411
1412 /* We don't want to do anything if we are about to be removed! */
1413 if (!USBVISION_IS_OPERATIONAL(usbvision))
1414 return;
1415
1416 /* any urb with wrong status is ignored without acknowledgement */
1417 if (urb->status == -ENOENT) {
1418 return;
1419 }
1420
1421 f = &usbvision->curFrame;
1422
1423 /* Manage streaming interruption */
1424 if (usbvision->streaming == Stream_Interrupt) {
1425 usbvision->streaming = Stream_Idle;
1426 if ((*f)) {
1427 (*f)->grabstate = FrameState_Ready;
1428 (*f)->scanstate = ScanState_Scanning;
1429 }
1430 PDEBUG(DBG_IRQ, "stream interrupted");
1431 wake_up_interruptible(&usbvision->wait_stream);
1432 }
1433
1434 /* Copy the data received into our scratch buffer */
1435 len = usbvision_compress_isochronous(usbvision, urb);
1436
1437 usbvision->isocUrbCount++;
1438 usbvision->urb_length = len;
1439
1440 if (usbvision->streaming == Stream_On) {
1441
1442 /* If we collected enough data let's parse! */
1443 if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) &&
1444 (!list_empty(&(usbvision->inqueue))) ) {
1445 if (!(*f)) {
1446 (*f) = list_entry(usbvision->inqueue.next,
1447 struct usbvision_frame,
1448 frame);
1449 }
1450 usbvision_parse_data(usbvision);
1451 }
1452 else {
1453 /*If we don't have a frame
1454 we're current working on, complain */
1455 PDEBUG(DBG_IRQ,
1456 "received data, but no one needs it");
1457 scratch_reset(usbvision);
1458 }
1459 }
1460 else {
1461 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1462 scratch_reset(usbvision);
1463 }
1464
1465 usbvision->timeInIrq += jiffies - startTime;
1466
1467 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1468 urb->iso_frame_desc[i].status = 0;
1469 urb->iso_frame_desc[i].actual_length = 0;
1470 }
1471
1472 urb->status = 0;
1473 urb->dev = usbvision->dev;
1474 errCode = usb_submit_urb (urb, GFP_ATOMIC);
1475
1476 if(errCode) {
1477 err("%s: usb_submit_urb failed: error %d",
1478 __FUNCTION__, errCode);
1479 }
1480
1481 return;
1482 }
1483
1484 /*************************************/
1485 /* Low level usbvision access functions */
1486 /*************************************/
1487
1488 /*
1489 * usbvision_read_reg()
1490 *
1491 * return < 0 -> Error
1492 * >= 0 -> Data
1493 */
1494
1495 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1496 {
1497 int errCode = 0;
1498 unsigned char buffer[1];
1499
1500 if (!USBVISION_IS_OPERATIONAL(usbvision))
1501 return -1;
1502
1503 errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1504 USBVISION_OP_CODE,
1505 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1506 0, (__u16) reg, buffer, 1, HZ);
1507
1508 if (errCode < 0) {
1509 err("%s: failed: error %d", __FUNCTION__, errCode);
1510 return errCode;
1511 }
1512 return buffer[0];
1513 }
1514
1515 /*
1516 * usbvision_write_reg()
1517 *
1518 * return 1 -> Reg written
1519 * 0 -> usbvision is not yet ready
1520 * -1 -> Something went wrong
1521 */
1522
1523 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1524 unsigned char value)
1525 {
1526 int errCode = 0;
1527
1528 if (!USBVISION_IS_OPERATIONAL(usbvision))
1529 return 0;
1530
1531 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1532 USBVISION_OP_CODE,
1533 USB_DIR_OUT | USB_TYPE_VENDOR |
1534 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1535
1536 if (errCode < 0) {
1537 err("%s: failed: error %d", __FUNCTION__, errCode);
1538 }
1539 return errCode;
1540 }
1541
1542
1543 static void usbvision_ctrlUrb_complete(struct urb *urb)
1544 {
1545 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1546
1547 PDEBUG(DBG_IRQ, "");
1548 usbvision->ctrlUrbBusy = 0;
1549 if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1550 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1551 }
1552 }
1553
1554
1555 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1556 unsigned char *data, int len)
1557 {
1558 int errCode = 0;
1559
1560 PDEBUG(DBG_IRQ, "");
1561 if (len > 8) {
1562 return -EFAULT;
1563 }
1564 // down(&usbvision->ctrlUrbLock);
1565 if (usbvision->ctrlUrbBusy) {
1566 // up(&usbvision->ctrlUrbLock);
1567 return -EBUSY;
1568 }
1569 usbvision->ctrlUrbBusy = 1;
1570 // up(&usbvision->ctrlUrbLock);
1571
1572 usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1573 usbvision->ctrlUrbSetup.bRequest = USBVISION_OP_CODE;
1574 usbvision->ctrlUrbSetup.wValue = 0;
1575 usbvision->ctrlUrbSetup.wIndex = cpu_to_le16(address);
1576 usbvision->ctrlUrbSetup.wLength = cpu_to_le16(len);
1577 usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1578 usb_sndctrlpipe(usbvision->dev, 1),
1579 (unsigned char *)&usbvision->ctrlUrbSetup,
1580 (void *)usbvision->ctrlUrbBuffer, len,
1581 usbvision_ctrlUrb_complete,
1582 (void *)usbvision);
1583
1584 memcpy(usbvision->ctrlUrbBuffer, data, len);
1585
1586 errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1587 if (errCode < 0) {
1588 // error in usb_submit_urb()
1589 usbvision->ctrlUrbBusy = 0;
1590 }
1591 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1592 return errCode;
1593 }
1594
1595
1596 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1597 {
1598 int errCode = 0;
1599
1600 usbvision->lastIsocFrameNum = -1;
1601 usbvision->isocDataCount = 0;
1602 usbvision->isocPacketCount = 0;
1603 usbvision->isocSkipCount = 0;
1604 usbvision->comprLevel = 50;
1605 usbvision->lastComprLevel = -1;
1606 usbvision->isocUrbCount = 0;
1607 usbvision->requestIntra = 1;
1608 usbvision->isocMeasureBandwidthCount = 0;
1609
1610 return errCode;
1611 }
1612
1613 /* this function measures the used bandwidth since last call
1614 * return: 0 : no error
1615 * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1616 */
1617 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1618 {
1619 int errCode = 0;
1620
1621 if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1622 usbvision->isocMeasureBandwidthCount++;
1623 return errCode;
1624 }
1625 if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1626 usbvision->usedBandwidth = usbvision->isocDataCount /
1627 (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1628 100 / usbvision->isocPacketSize;
1629 }
1630 usbvision->isocMeasureBandwidthCount = 0;
1631 usbvision->isocDataCount = 0;
1632 usbvision->isocPacketCount = 0;
1633 usbvision->isocSkipCount = 0;
1634 return errCode;
1635 }
1636
1637 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1638 {
1639 int errCode = 0;
1640 unsigned char buffer[6];
1641
1642 PDEBUG(DBG_IRQ, "");
1643 if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1644 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1645 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1646 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1647 int distorsion;
1648 if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
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 = 7 + 248 * usbvision->comprLevel / 100;
1652 buffer[2] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (inter)
1653 buffer[3] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (intra)
1654 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1655 buffer[4] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (inter)
1656 buffer[5] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (intra)
1657 }
1658 else { //BRIDGE_NT1003
1659 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM threshold 1
1660 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM threshold 2
1661 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1662 buffer[2] = (unsigned char)(distorsion & 0xFF); // distorsion threshold bit0-7
1663 buffer[3] = 0; //(unsigned char)((distorsion >> 8) & 0x0F); // distorsion threshold bit 8-11
1664 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1665 buffer[4] = (unsigned char)(distorsion & 0xFF); // maximum distorsion bit0-7
1666 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01); // maximum distorsion bit 8
1667 }
1668 errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1669 if (errCode == 0){
1670 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1671 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1672 usbvision->lastComprLevel = usbvision->comprLevel;
1673 }
1674 }
1675 }
1676 return errCode;
1677 }
1678
1679 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1680 {
1681 int errCode = 0;
1682 unsigned char buffer[1];
1683
1684 PDEBUG(DBG_IRQ, "");
1685 usbvision->requestIntra = 1;
1686 buffer[0] = 1;
1687 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1688 return errCode;
1689 }
1690
1691 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1692 {
1693 int errCode = 0;
1694 unsigned char buffer[1];
1695
1696 PDEBUG(DBG_IRQ, "");
1697 usbvision->requestIntra = 0;
1698 buffer[0] = 0;
1699 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1700 return errCode;
1701 }
1702
1703 /*******************************
1704 * usbvision utility functions
1705 *******************************/
1706
1707 int usbvision_power_off(struct usb_usbvision *usbvision)
1708 {
1709 int errCode = 0;
1710
1711 PDEBUG(DBG_FUNC, "");
1712
1713 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1714 if (errCode == 1) {
1715 usbvision->power = 0;
1716 }
1717 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1718 return errCode;
1719 }
1720
1721 /*
1722 * usbvision_set_video_format()
1723 *
1724 */
1725 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1726 {
1727 static const char proc[] = "usbvision_set_video_format";
1728 int rc;
1729 unsigned char value[2];
1730
1731 if (!USBVISION_IS_OPERATIONAL(usbvision))
1732 return 0;
1733
1734 PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1735
1736 if ((format != ISOC_MODE_YUV422)
1737 && (format != ISOC_MODE_YUV420)
1738 && (format != ISOC_MODE_COMPRESS)) {
1739 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1740 format);
1741 format = ISOC_MODE_YUV420;
1742 }
1743 value[0] = 0x0A; //TODO: See the effect of the filter
1744 value[1] = format; // Sets the VO_MODE register which follows FILT_CONT
1745 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1746 USBVISION_OP_CODE,
1747 USB_DIR_OUT | USB_TYPE_VENDOR |
1748 USB_RECIP_ENDPOINT, 0,
1749 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1750
1751 if (rc < 0) {
1752 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1753 "reconnect or reload driver.\n", proc, rc);
1754 }
1755 usbvision->isocMode = format;
1756 return rc;
1757 }
1758
1759 /*
1760 * usbvision_set_output()
1761 *
1762 */
1763
1764 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1765 int height)
1766 {
1767 int errCode = 0;
1768 int UsbWidth, UsbHeight;
1769 unsigned int frameRate=0, frameDrop=0;
1770 unsigned char value[4];
1771
1772 if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1773 return 0;
1774 }
1775
1776 if (width > MAX_USB_WIDTH) {
1777 UsbWidth = width / 2;
1778 usbvision->stretch_width = 2;
1779 }
1780 else {
1781 UsbWidth = width;
1782 usbvision->stretch_width = 1;
1783 }
1784
1785 if (height > MAX_USB_HEIGHT) {
1786 UsbHeight = height / 2;
1787 usbvision->stretch_height = 2;
1788 }
1789 else {
1790 UsbHeight = height;
1791 usbvision->stretch_height = 1;
1792 }
1793
1794 RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1795 UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1796 RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1797 UsbHeight &= ~(1);
1798
1799 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1800 UsbWidth, UsbHeight, width, height,
1801 usbvision->stretch_width, usbvision->stretch_height);
1802
1803 /* I'll not rewrite the same values */
1804 if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1805 value[0] = UsbWidth & 0xff; //LSB
1806 value[1] = (UsbWidth >> 8) & 0x03; //MSB
1807 value[2] = UsbHeight & 0xff; //LSB
1808 value[3] = (UsbHeight >> 8) & 0x03; //MSB
1809
1810 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1811 USBVISION_OP_CODE,
1812 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1813 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1814
1815 if (errCode < 0) {
1816 err("%s failed: error %d", __FUNCTION__, errCode);
1817 return errCode;
1818 }
1819 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1820 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1821 }
1822
1823 if (usbvision->isocMode == ISOC_MODE_YUV422) {
1824 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1825 }
1826 else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1827 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1828 }
1829 else {
1830 frameRate = FRAMERATE_MAX;
1831 }
1832
1833 if (usbvision->tvnormId & V4L2_STD_625_50) {
1834 frameDrop = frameRate * 32 / 25 - 1;
1835 }
1836 else if (usbvision->tvnormId & V4L2_STD_525_60) {
1837 frameDrop = frameRate * 32 / 30 - 1;
1838 }
1839
1840 RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1841
1842 PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1843
1844 frameDrop = FRAMERATE_MAX; // We can allow the maximum here, because dropping is controlled
1845
1846 /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1847 => frameSkip = 4;
1848 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1849
1850 frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1851 => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1852 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1853 */
1854 errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1855 return errCode;
1856 }
1857
1858
1859 /*
1860 * usbvision_frames_alloc
1861 * allocate the required frames
1862 */
1863 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1864 {
1865 int i;
1866
1867 /*needs to be page aligned cause the buffers can be mapped individually! */
1868 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
1869 usbvision->curheight *
1870 usbvision->palette.bytes_per_pixel);
1871
1872 /* Try to do my best to allocate the frames the user want in the remaining memory */
1873 usbvision->num_frames = number_of_frames;
1874 while (usbvision->num_frames > 0) {
1875 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1876 if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
1877 break;
1878 }
1879 usbvision->num_frames--;
1880 }
1881
1882 spin_lock_init(&usbvision->queue_lock);
1883 init_waitqueue_head(&usbvision->wait_frame);
1884 init_waitqueue_head(&usbvision->wait_stream);
1885
1886 /* Allocate all buffers */
1887 for (i = 0; i < usbvision->num_frames; i++) {
1888 usbvision->frame[i].index = i;
1889 usbvision->frame[i].grabstate = FrameState_Unused;
1890 usbvision->frame[i].data = usbvision->fbuf +
1891 i * usbvision->max_frame_size;
1892 /*
1893 * Set default sizes for read operation.
1894 */
1895 usbvision->stretch_width = 1;
1896 usbvision->stretch_height = 1;
1897 usbvision->frame[i].width = usbvision->curwidth;
1898 usbvision->frame[i].height = usbvision->curheight;
1899 usbvision->frame[i].bytes_read = 0;
1900 }
1901 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
1902 return usbvision->num_frames;
1903 }
1904
1905 /*
1906 * usbvision_frames_free
1907 * frees memory allocated for the frames
1908 */
1909 void usbvision_frames_free(struct usb_usbvision *usbvision)
1910 {
1911 /* Have to free all that memory */
1912 PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
1913
1914 if (usbvision->fbuf != NULL) {
1915 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1916 usbvision->fbuf = NULL;
1917
1918 usbvision->num_frames = 0;
1919 }
1920 }
1921 /*
1922 * usbvision_empty_framequeues()
1923 * prepare queues for incoming and outgoing frames
1924 */
1925 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1926 {
1927 u32 i;
1928
1929 INIT_LIST_HEAD(&(usbvision->inqueue));
1930 INIT_LIST_HEAD(&(usbvision->outqueue));
1931
1932 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1933 usbvision->frame[i].grabstate = FrameState_Unused;
1934 usbvision->frame[i].bytes_read = 0;
1935 }
1936 }
1937
1938 /*
1939 * usbvision_stream_interrupt()
1940 * stops streaming
1941 */
1942 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1943 {
1944 int ret = 0;
1945
1946 /* stop reading from the device */
1947
1948 usbvision->streaming = Stream_Interrupt;
1949 ret = wait_event_timeout(usbvision->wait_stream,
1950 (usbvision->streaming == Stream_Idle),
1951 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1952 return ret;
1953 }
1954
1955 /*
1956 * usbvision_set_compress_params()
1957 *
1958 */
1959
1960 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1961 {
1962 static const char proc[] = "usbvision_set_compresion_params: ";
1963 int rc;
1964 unsigned char value[6];
1965
1966 value[0] = 0x0F; // Intra-Compression cycle
1967 value[1] = 0x01; // Reg.45 one line per strip
1968 value[2] = 0x00; // Reg.46 Force intra mode on all new frames
1969 value[3] = 0x00; // Reg.47 FORCE_UP <- 0 normal operation (not force)
1970 value[4] = 0xA2; // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
1971 value[5] = 0x00; // Reg.49 DVI_YUV This has nothing to do with compression
1972
1973 //catched values for NT1004
1974 // value[0] = 0xFF; // Never apply intra mode automatically
1975 // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
1976 // value[2] = 0x01; // Force intra mode on all new frames
1977 // value[3] = 0x00; // Strip size 400 Bytes; do not force up
1978 // value[4] = 0xA2; //
1979 if (!USBVISION_IS_OPERATIONAL(usbvision))
1980 return 0;
1981
1982 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1983 USBVISION_OP_CODE,
1984 USB_DIR_OUT | USB_TYPE_VENDOR |
1985 USB_RECIP_ENDPOINT, 0,
1986 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1987
1988 if (rc < 0) {
1989 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1990 "reconnect or reload driver.\n", proc, rc);
1991 return rc;
1992 }
1993
1994 if (usbvision->bridgeType == BRIDGE_NT1004) {
1995 value[0] = 20; // PCM Threshold 1
1996 value[1] = 12; // PCM Threshold 2
1997 value[2] = 255; // Distorsion Threshold inter
1998 value[3] = 255; // Distorsion Threshold intra
1999 value[4] = 43; // Max Distorsion inter
2000 value[5] = 43; // Max Distorsion intra
2001 }
2002 else {
2003 value[0] = 20; // PCM Threshold 1
2004 value[1] = 12; // PCM Threshold 2
2005 value[2] = 255; // Distorsion Threshold d7-d0
2006 value[3] = 0; // Distorsion Threshold d11-d8
2007 value[4] = 43; // Max Distorsion d7-d0
2008 value[5] = 0; // Max Distorsion d8
2009 }
2010
2011 if (!USBVISION_IS_OPERATIONAL(usbvision))
2012 return 0;
2013
2014 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2015 USBVISION_OP_CODE,
2016 USB_DIR_OUT | USB_TYPE_VENDOR |
2017 USB_RECIP_ENDPOINT, 0,
2018 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2019
2020 if (rc < 0) {
2021 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2022 "reconnect or reload driver.\n", proc, rc);
2023 return rc;
2024 }
2025
2026
2027 return rc;
2028 }
2029
2030
2031 /*
2032 * usbvision_set_input()
2033 *
2034 * Set the input (saa711x, ...) size x y and other misc input params
2035 * I've no idea if this parameters are right
2036 *
2037 */
2038 int usbvision_set_input(struct usb_usbvision *usbvision)
2039 {
2040 static const char proc[] = "usbvision_set_input: ";
2041 int rc;
2042 unsigned char value[8];
2043 unsigned char dvi_yuv_value;
2044
2045 if (!USBVISION_IS_OPERATIONAL(usbvision))
2046 return 0;
2047
2048 /* Set input format expected from decoder*/
2049 if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) {
2050 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1;
2051 } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2052 /* SAA7113 uses 8 bit output */
2053 value[0] = USBVISION_8_422_SYNC;
2054 } else {
2055 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2056 * as that is how saa7111 is configured */
2057 value[0] = USBVISION_16_422_SYNC;
2058 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2059 }
2060
2061 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2062 if (rc < 0) {
2063 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2064 "reconnect or reload driver.\n", proc, rc);
2065 return rc;
2066 }
2067
2068
2069 if (usbvision->tvnormId & V4L2_STD_PAL) {
2070 value[0] = 0xC0;
2071 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2072 value[2] = 0x20;
2073 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2074 value[4] = 0x60;
2075 value[5] = 0x00; //0x0060 -> 96 Input video h offset
2076 value[6] = 0x16;
2077 value[7] = 0x00; //0x0016 -> 22 Input video v offset
2078 } else if (usbvision->tvnormId & V4L2_STD_SECAM) {
2079 value[0] = 0xC0;
2080 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2081 value[2] = 0x20;
2082 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2083 value[4] = 0x01;
2084 value[5] = 0x00; //0x0001 -> 01 Input video h offset
2085 value[6] = 0x01;
2086 value[7] = 0x00; //0x0001 -> 01 Input video v offset
2087 } else { /* V4L2_STD_NTSC */
2088 value[0] = 0xD0;
2089 value[1] = 0x02; //0x02D0 -> 720 Input video line length
2090 value[2] = 0xF0;
2091 value[3] = 0x00; //0x00F0 -> 240 Input video number of lines
2092 value[4] = 0x50;
2093 value[5] = 0x00; //0x0050 -> 80 Input video h offset
2094 value[6] = 0x10;
2095 value[7] = 0x00; //0x0010 -> 16 Input video v offset
2096 }
2097
2098 if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2099 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2100 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2101 }
2102
2103 if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2104 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2105 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2106 }
2107
2108 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2109 USBVISION_OP_CODE, /* USBVISION specific code */
2110 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2111 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2112 if (rc < 0) {
2113 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2114 "reconnect or reload driver.\n", proc, rc);
2115 return rc;
2116 }
2117
2118
2119 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2120
2121 if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){
2122 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv;
2123 }
2124 else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2125 /* This changes as the fine sync control changes. Further investigation necessary */
2126 dvi_yuv_value = 0x06;
2127 }
2128
2129 return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2130 }
2131
2132
2133 /*
2134 * usbvision_set_dram_settings()
2135 *
2136 * Set the buffer address needed by the usbvision dram to operate
2137 * This values has been taken with usbsnoop.
2138 *
2139 */
2140
2141 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2142 {
2143 int rc;
2144 unsigned char value[8];
2145
2146 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2147 value[0] = 0x42;
2148 value[1] = 0x71;
2149 value[2] = 0xff;
2150 value[3] = 0x00;
2151 value[4] = 0x98;
2152 value[5] = 0xe0;
2153 value[6] = 0x71;
2154 value[7] = 0xff;
2155 // UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2156 // FDL: 0x00000-0x0E099 = 57498 Words
2157 // VDW: 0x0E3FF-0x3FFFF
2158 }
2159 else {
2160 value[0] = 0x42;
2161 value[1] = 0x00;
2162 value[2] = 0xff;
2163 value[3] = 0x00;
2164 value[4] = 0x00;
2165 value[5] = 0x00;
2166 value[6] = 0x00;
2167 value[7] = 0xff;
2168 }
2169 /* These are the values of the address of the video buffer,
2170 * they have to be loaded into the USBVISION_DRM_PRM1-8
2171 *
2172 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2173 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2174 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2175 * Only used in compressed mode
2176 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2177 * Only used in compressed mode
2178 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2179 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2180 */
2181
2182 if (!USBVISION_IS_OPERATIONAL(usbvision))
2183 return 0;
2184
2185 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2186 USBVISION_OP_CODE, /* USBVISION specific code */
2187 USB_DIR_OUT | USB_TYPE_VENDOR |
2188 USB_RECIP_ENDPOINT, 0,
2189 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2190
2191 if (rc < 0) {
2192 err("%sERROR=%d", __FUNCTION__, rc);
2193 return rc;
2194 }
2195
2196 /* Restart the video buffer logic */
2197 if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2198 USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2199 return rc;
2200 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2201
2202 return rc;
2203 }
2204
2205 /*
2206 * ()
2207 *
2208 * Power on the device, enables suspend-resume logic
2209 * & reset the isoc End-Point
2210 *
2211 */
2212
2213 int usbvision_power_on(struct usb_usbvision *usbvision)
2214 {
2215 int errCode = 0;
2216
2217 PDEBUG(DBG_FUNC, "");
2218
2219 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2220 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2221 USBVISION_SSPND_EN | USBVISION_RES2);
2222
2223 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2224 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2225 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2226 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2227 if (errCode == 1) {
2228 usbvision->power = 1;
2229 }
2230 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2231 return errCode;
2232 }
2233
2234
2235 /*
2236 * usbvision timer stuff
2237 */
2238
2239 // to call usbvision_power_off from task queue
2240 static void call_usbvision_power_off(struct work_struct *work)
2241 {
2242 struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2243
2244 PDEBUG(DBG_FUNC, "");
2245 if(mutex_lock_interruptible(&usbvision->lock)) {
2246 return;
2247 }
2248
2249
2250 if(usbvision->user == 0) {
2251 usbvision_i2c_unregister(usbvision);
2252
2253 usbvision_power_off(usbvision);
2254 usbvision->initialized = 0;
2255 }
2256 mutex_unlock(&usbvision->lock);
2257 }
2258
2259 static void usbvision_powerOffTimer(unsigned long data)
2260 {
2261 struct usb_usbvision *usbvision = (void *) data;
2262
2263 PDEBUG(DBG_FUNC, "");
2264 del_timer(&usbvision->powerOffTimer);
2265 INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2266 (void) schedule_work(&usbvision->powerOffWork);
2267
2268 }
2269
2270 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2271 {
2272 init_timer(&usbvision->powerOffTimer);
2273 usbvision->powerOffTimer.data = (long) usbvision;
2274 usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2275 }
2276
2277 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2278 {
2279 mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2280 }
2281
2282 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2283 {
2284 if (timer_pending(&usbvision->powerOffTimer)) {
2285 del_timer(&usbvision->powerOffTimer);
2286 }
2287 }
2288
2289 /*
2290 * usbvision_begin_streaming()
2291 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2292 * idea about the rest
2293 */
2294 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2295 {
2296 int errCode = 0;
2297
2298 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2299 usbvision_init_compression(usbvision);
2300 }
2301 errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2302 usbvision->Vin_Reg2_Preset);
2303 return errCode;
2304 }
2305
2306 /*
2307 * usbvision_restart_isoc()
2308 * Not sure yet if touching here PWR_REG make loose the config
2309 */
2310
2311 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2312 {
2313 int ret;
2314
2315 if (
2316 (ret =
2317 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2318 USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2319 return ret;
2320 if (
2321 (ret =
2322 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2323 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2324 USBVISION_RES2)) < 0)
2325 return ret;
2326 if (
2327 (ret =
2328 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2329 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2330 usbvision->Vin_Reg2_Preset)) < 0) return ret;
2331
2332 /* TODO: schedule timeout */
2333 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2334
2335 return 0;
2336 }
2337
2338 int usbvision_audio_off(struct usb_usbvision *usbvision)
2339 {
2340 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2341 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2342 return -1;
2343 }
2344 usbvision->AudioMute = 0;
2345 usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2346 return 0;
2347 }
2348
2349 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2350 {
2351 if (!usbvision->AudioMute) {
2352 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2353 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2354 return -1;
2355 }
2356 }
2357 usbvision->AudioChannel = AudioChannel;
2358 return 0;
2359 }
2360
2361 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2362 {
2363 usbvision_set_video_format(usbvision, format);
2364 usbvision_set_dram_settings(usbvision);
2365 usbvision_set_compress_params(usbvision);
2366 usbvision_set_input(usbvision);
2367 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2368 usbvision_restart_isoc(usbvision);
2369
2370 /* cosas del PCM */
2371 return USBVISION_IS_OPERATIONAL(usbvision);
2372 }
2373
2374 int usbvision_set_alternate(struct usb_usbvision *dev)
2375 {
2376 int errCode, prev_alt = dev->ifaceAlt;
2377 int i;
2378
2379 dev->ifaceAlt=0;
2380 for(i=0;i< dev->num_alt; i++)
2381 if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt])
2382 dev->ifaceAlt=i;
2383
2384 if (dev->ifaceAlt != prev_alt) {
2385 dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt];
2386 PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize);
2387 errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt);
2388 if (errCode < 0) {
2389 err ("cannot change alternate number to %d (error=%i)",
2390 dev->ifaceAlt, errCode);
2391 return errCode;
2392 }
2393 }
2394
2395 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize);
2396
2397 return 0;
2398 }
2399
2400 /*
2401 * usbvision_init_isoc()
2402 *
2403 */
2404 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2405 {
2406 struct usb_device *dev = usbvision->dev;
2407 int bufIdx, errCode, regValue;
2408 int sb_size;
2409
2410 if (!USBVISION_IS_OPERATIONAL(usbvision))
2411 return -EFAULT;
2412
2413 usbvision->curFrame = NULL;
2414 scratch_reset(usbvision);
2415
2416 /* Alternate interface 1 is is the biggest frame size */
2417 errCode = usbvision_set_alternate(usbvision);
2418 if (errCode < 0) {
2419 usbvision->last_error = errCode;
2420 return -EBUSY;
2421 }
2422 sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2423
2424 regValue = (16 - usbvision_read_reg(usbvision,
2425 USBVISION_ALTER_REG)) & 0x0F;
2426
2427 usbvision->usb_bandwidth = regValue >> 1;
2428 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2429 usbvision->usb_bandwidth);
2430
2431
2432
2433 /* We double buffer the Iso lists */
2434
2435 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2436 int j, k;
2437 struct urb *urb;
2438
2439 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2440 if (urb == NULL) {
2441 err("%s: usb_alloc_urb() failed", __FUNCTION__);
2442 return -ENOMEM;
2443 }
2444 usbvision->sbuf[bufIdx].urb = urb;
2445 usbvision->sbuf[bufIdx].data =
2446 usb_buffer_alloc(usbvision->dev,
2447 sb_size,
2448 GFP_KERNEL,
2449 &urb->transfer_dma);
2450 urb->dev = dev;
2451 urb->context = usbvision;
2452 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2453 urb->transfer_flags = URB_ISO_ASAP;
2454 urb->interval = 1;
2455 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2456 urb->complete = usbvision_isocIrq;
2457 urb->number_of_packets = USBVISION_URB_FRAMES;
2458 urb->transfer_buffer_length =
2459 usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2460 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2461 k += usbvision->isocPacketSize) {
2462 urb->iso_frame_desc[j].offset = k;
2463 urb->iso_frame_desc[j].length =
2464 usbvision->isocPacketSize;
2465 }
2466 }
2467
2468
2469 /* Submit all URBs */
2470 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2471 errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb,
2472 GFP_KERNEL);
2473 if (errCode) {
2474 err("%s: usb_submit_urb(%d) failed: error %d",
2475 __FUNCTION__, bufIdx, errCode);
2476 }
2477 }
2478
2479 usbvision->streaming = Stream_Idle;
2480 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2481 __FUNCTION__,
2482 usbvision->video_endp);
2483 return 0;
2484 }
2485
2486 /*
2487 * usbvision_stop_isoc()
2488 *
2489 * This procedure stops streaming and deallocates URBs. Then it
2490 * activates zero-bandwidth alt. setting of the video interface.
2491 *
2492 */
2493 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2494 {
2495 int bufIdx, errCode, regValue;
2496 int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2497
2498 if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2499 return;
2500
2501 /* Unschedule all of the iso td's */
2502 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2503 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2504 if (usbvision->sbuf[bufIdx].data){
2505 usb_buffer_free(usbvision->dev,
2506 sb_size,
2507 usbvision->sbuf[bufIdx].data,
2508 usbvision->sbuf[bufIdx].urb->transfer_dma);
2509 }
2510 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2511 usbvision->sbuf[bufIdx].urb = NULL;
2512 }
2513
2514
2515 PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __FUNCTION__);
2516 usbvision->streaming = Stream_Off;
2517
2518 if (!usbvision->remove_pending) {
2519
2520 /* Set packet size to 0 */
2521 usbvision->ifaceAlt=0;
2522 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2523 usbvision->ifaceAlt);
2524 if (errCode < 0) {
2525 err("%s: usb_set_interface() failed: error %d",
2526 __FUNCTION__, errCode);
2527 usbvision->last_error = errCode;
2528 }
2529 regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2530 usbvision->isocPacketSize =
2531 (regValue == 0) ? 0 : (regValue * 64) - 1;
2532 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2533 usbvision->isocPacketSize);
2534
2535 usbvision->usb_bandwidth = regValue >> 1;
2536 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2537 usbvision->usb_bandwidth);
2538 }
2539 }
2540
2541 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2542 {
2543 /* inputs #0 and #3 are constant for every SAA711x. */
2544 /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2545 int mode[4]= {SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3};
2546 int audio[]= {1, 0, 0, 0};
2547 struct v4l2_routing route;
2548 //channel 0 is TV with audiochannel 1 (tuner mono)
2549 //channel 1 is Composite with audio channel 0 (line in)
2550 //channel 2 is S-Video with audio channel 0 (line in)
2551 //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2552
2553 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2554 usbvision->ctl_input = channel;
2555
2556 // set the new channel
2557 // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2558 // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2559
2560 switch (usbvision_device_data[usbvision->DevModel].Codec) {
2561 case CODEC_SAA7113:
2562 mode[1] = SAA7115_COMPOSITE2;
2563 if (SwitchSVideoInput) {
2564 /* To handle problems with S-Video Input for
2565 * some devices. Use SwitchSVideoInput
2566 * parameter when loading the module.*/
2567 mode[2] = SAA7115_COMPOSITE1;
2568 }
2569 else {
2570 mode[2] = SAA7115_SVIDEO1;
2571 }
2572 break;
2573 case CODEC_SAA7111:
2574 default:
2575 /* modes for saa7111 */
2576 mode[1] = SAA7115_COMPOSITE1;
2577 mode[2] = SAA7115_SVIDEO1;
2578 break;
2579 }
2580 route.input = mode[channel];
2581 route.output = 0;
2582 call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2583 usbvision_set_audio(usbvision, audio[channel]);
2584 return 0;
2585 }
2586
2587 /*
2588 * Overrides for Emacs so that we follow Linus's tabbing style.
2589 * ---------------------------------------------------------------------------
2590 * Local variables:
2591 * c-basic-offset: 8
2592 * End:
2593 */
Verdex Pro support