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Merge branch 'slub/earlyboot' into for-linus
[deliverable/linux.git] / drivers / media / video / usbvision / usbvision-core.c
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/vmalloc.h>
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/spinlock.h>
37 #include <asm/io.h>
38 #include <linux/videodev2.h>
39 #include <linux/i2c.h>
40
41 #include <media/saa7115.h>
42 #include <media/v4l2-common.h>
43 #include <media/tuner.h>
44
45 #include <linux/workqueue.h>
46
47 #include "usbvision.h"
48
49 static unsigned int core_debug;
50 module_param(core_debug,int,0644);
51 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
52
53 static unsigned int force_testpattern;
54 module_param(force_testpattern,int,0644);
55 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
56
57 static int adjustCompression = 1; /* Set the compression to be adaptive */
58 module_param(adjustCompression, int, 0444);
59 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device. Default: 1 (On)");
60
61 /* To help people with Black and White output with using s-video input.
62 * Some cables and input device are wired differently. */
63 static int SwitchSVideoInput;
64 module_param(SwitchSVideoInput, int, 0444);
65 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)");
66
67 static unsigned int adjust_X_Offset = -1;
68 module_param(adjust_X_Offset, int, 0644);
69 MODULE_PARM_DESC(adjust_X_Offset, "adjust X offset display [core]");
70
71 static unsigned int adjust_Y_Offset = -1;
72 module_param(adjust_Y_Offset, int, 0644);
73 MODULE_PARM_DESC(adjust_Y_Offset, "adjust Y offset display [core]");
74
75
76 #define ENABLE_HEXDUMP 0 /* Enable if you need it */
77
78
79 #ifdef USBVISION_DEBUG
80 #define PDEBUG(level, fmt, args...) { \
81 if (core_debug & (level)) \
82 printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
83 __func__, __LINE__ , ## args); \
84 }
85 #else
86 #define PDEBUG(level, fmt, args...) do {} while(0)
87 #endif
88
89 #define DBG_HEADER 1<<0
90 #define DBG_IRQ 1<<1
91 #define DBG_ISOC 1<<2
92 #define DBG_PARSE 1<<3
93 #define DBG_SCRATCH 1<<4
94 #define DBG_FUNC 1<<5
95
96 static const int max_imgwidth = MAX_FRAME_WIDTH;
97 static const int max_imgheight = MAX_FRAME_HEIGHT;
98 static const int min_imgwidth = MIN_FRAME_WIDTH;
99 static const int min_imgheight = MIN_FRAME_HEIGHT;
100
101 /* The value of 'scratch_buf_size' affects quality of the picture
102 * in many ways. Shorter buffers may cause loss of data when client
103 * is too slow. Larger buffers are memory-consuming and take longer
104 * to work with. This setting can be adjusted, but the default value
105 * should be OK for most desktop users.
106 */
107 #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) // 128kB memory scratch buffer
108 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
109
110 // Function prototypes
111 static int usbvision_request_intra (struct usb_usbvision *usbvision);
112 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
113 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
114 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
115
116 /*******************************/
117 /* Memory management functions */
118 /*******************************/
119
120 /*
121 * Here we want the physical address of the memory.
122 * This is used when initializing the contents of the area.
123 */
124
125 static void *usbvision_rvmalloc(unsigned long size)
126 {
127 void *mem;
128 unsigned long adr;
129
130 size = PAGE_ALIGN(size);
131 mem = vmalloc_32(size);
132 if (!mem)
133 return NULL;
134
135 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
136 adr = (unsigned long) mem;
137 while (size > 0) {
138 SetPageReserved(vmalloc_to_page((void *)adr));
139 adr += PAGE_SIZE;
140 size -= PAGE_SIZE;
141 }
142
143 return mem;
144 }
145
146 static void usbvision_rvfree(void *mem, unsigned long size)
147 {
148 unsigned long adr;
149
150 if (!mem)
151 return;
152
153 size = PAGE_ALIGN(size);
154
155 adr = (unsigned long) mem;
156 while ((long) size > 0) {
157 ClearPageReserved(vmalloc_to_page((void *)adr));
158 adr += PAGE_SIZE;
159 size -= PAGE_SIZE;
160 }
161
162 vfree(mem);
163 }
164
165
166 #if ENABLE_HEXDUMP
167 static void usbvision_hexdump(const unsigned char *data, int len)
168 {
169 char tmp[80];
170 int i, k;
171
172 for (i = k = 0; len > 0; i++, len--) {
173 if (i > 0 && (i % 16 == 0)) {
174 printk("%s\n", tmp);
175 k = 0;
176 }
177 k += sprintf(&tmp[k], "%02x ", data[i]);
178 }
179 if (k > 0)
180 printk("%s\n", tmp);
181 }
182 #endif
183
184 /********************************
185 * scratch ring buffer handling
186 ********************************/
187 static int scratch_len(struct usb_usbvision *usbvision) /*This returns the amount of data actually in the buffer */
188 {
189 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
190 if (len < 0) {
191 len += scratch_buf_size;
192 }
193 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
194
195 return len;
196 }
197
198
199 /* This returns the free space left in the buffer */
200 static int scratch_free(struct usb_usbvision *usbvision)
201 {
202 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
203 if (free <= 0) {
204 free += scratch_buf_size;
205 }
206 if (free) {
207 free -= 1; /* at least one byte in the buffer must */
208 /* left blank, otherwise there is no chance to differ between full and empty */
209 }
210 PDEBUG(DBG_SCRATCH, "return %d\n", free);
211
212 return free;
213 }
214
215
216 /* This puts data into the buffer */
217 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
218 int len)
219 {
220 int len_part;
221
222 if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
223 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
224 usbvision->scratch_write_ptr += len;
225 }
226 else {
227 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
228 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
229 if (len == len_part) {
230 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */
231 }
232 else {
233 memcpy(usbvision->scratch, data + len_part, len - len_part);
234 usbvision->scratch_write_ptr = len - len_part;
235 }
236 }
237
238 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
239
240 return len;
241 }
242
243 /* This marks the write_ptr as position of new frame header */
244 static void scratch_mark_header(struct usb_usbvision *usbvision)
245 {
246 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
247
248 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
249 usbvision->scratch_write_ptr;
250 usbvision->scratch_headermarker_write_ptr += 1;
251 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
252 }
253
254 /* This gets data from the buffer at the given "ptr" position */
255 static int scratch_get_extra(struct usb_usbvision *usbvision,
256 unsigned char *data, int *ptr, int len)
257 {
258 int len_part;
259 if (*ptr + len < scratch_buf_size) {
260 memcpy(data, usbvision->scratch + *ptr, len);
261 *ptr += len;
262 }
263 else {
264 len_part = scratch_buf_size - *ptr;
265 memcpy(data, usbvision->scratch + *ptr, len_part);
266 if (len == len_part) {
267 *ptr = 0; /* just set the y_ptr to zero */
268 }
269 else {
270 memcpy(data + len_part, usbvision->scratch, len - len_part);
271 *ptr = len - len_part;
272 }
273 }
274
275 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
276
277 return len;
278 }
279
280
281 /* This sets the scratch extra read pointer */
282 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
283 int len)
284 {
285 *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
286
287 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
288 }
289
290
291 /*This increments the scratch extra read pointer */
292 static void scratch_inc_extra_ptr(int *ptr, int len)
293 {
294 *ptr = (*ptr + len) % scratch_buf_size;
295
296 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
297 }
298
299
300 /* This gets data from the buffer */
301 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
302 int len)
303 {
304 int len_part;
305 if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
306 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
307 usbvision->scratch_read_ptr += len;
308 }
309 else {
310 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
311 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
312 if (len == len_part) {
313 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */
314 }
315 else {
316 memcpy(data + len_part, usbvision->scratch, len - len_part);
317 usbvision->scratch_read_ptr = len - len_part;
318 }
319 }
320
321 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
322
323 return len;
324 }
325
326
327 /* This sets read pointer to next header and returns it */
328 static int scratch_get_header(struct usb_usbvision *usbvision,
329 struct usbvision_frame_header *header)
330 {
331 int errCode = 0;
332
333 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
334
335 while (usbvision->scratch_headermarker_write_ptr -
336 usbvision->scratch_headermarker_read_ptr != 0) {
337 usbvision->scratch_read_ptr =
338 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
339 usbvision->scratch_headermarker_read_ptr += 1;
340 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
341 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
342 if ((header->magic_1 == USBVISION_MAGIC_1)
343 && (header->magic_2 == USBVISION_MAGIC_2)
344 && (header->headerLength == USBVISION_HEADER_LENGTH)) {
345 errCode = USBVISION_HEADER_LENGTH;
346 header->frameWidth = header->frameWidthLo + (header->frameWidthHi << 8);
347 header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
348 break;
349 }
350 }
351
352 return errCode;
353 }
354
355
356 /*This removes len bytes of old data from the buffer */
357 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
358 {
359
360 usbvision->scratch_read_ptr += len;
361 usbvision->scratch_read_ptr %= scratch_buf_size;
362 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
363 }
364
365
366 /*This resets the buffer - kills all data in it too */
367 static void scratch_reset(struct usb_usbvision *usbvision)
368 {
369 PDEBUG(DBG_SCRATCH, "\n");
370
371 usbvision->scratch_read_ptr = 0;
372 usbvision->scratch_write_ptr = 0;
373 usbvision->scratch_headermarker_read_ptr = 0;
374 usbvision->scratch_headermarker_write_ptr = 0;
375 usbvision->isocstate = IsocState_NoFrame;
376 }
377
378 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
379 {
380 usbvision->scratch = vmalloc_32(scratch_buf_size);
381 scratch_reset(usbvision);
382 if(usbvision->scratch == NULL) {
383 dev_err(&usbvision->dev->dev,
384 "%s: unable to allocate %d bytes for scratch\n",
385 __func__, scratch_buf_size);
386 return -ENOMEM;
387 }
388 return 0;
389 }
390
391 void usbvision_scratch_free(struct usb_usbvision *usbvision)
392 {
393 vfree(usbvision->scratch);
394 usbvision->scratch = NULL;
395
396 }
397
398 /*
399 * usbvision_testpattern()
400 *
401 * Procedure forms a test pattern (yellow grid on blue background).
402 *
403 * Parameters:
404 * fullframe: if TRUE then entire frame is filled, otherwise the procedure
405 * continues from the current scanline.
406 * pmode 0: fill the frame with solid blue color (like on VCR or TV)
407 * 1: Draw a colored grid
408 *
409 */
410 static void usbvision_testpattern(struct usb_usbvision *usbvision,
411 int fullframe, int pmode)
412 {
413 static const char proc[] = "usbvision_testpattern";
414 struct usbvision_frame *frame;
415 unsigned char *f;
416 int num_cell = 0;
417 int scan_length = 0;
418 static int num_pass;
419
420 if (usbvision == NULL) {
421 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
422 return;
423 }
424 if (usbvision->curFrame == NULL) {
425 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
426 return;
427 }
428
429 /* Grab the current frame */
430 frame = usbvision->curFrame;
431
432 /* Optionally start at the beginning */
433 if (fullframe) {
434 frame->curline = 0;
435 frame->scanlength = 0;
436 }
437
438 /* Form every scan line */
439 for (; frame->curline < frame->frmheight; frame->curline++) {
440 int i;
441
442 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
443 for (i = 0; i < usbvision->curwidth; i++) {
444 unsigned char cb = 0x80;
445 unsigned char cg = 0;
446 unsigned char cr = 0;
447
448 if (pmode == 1) {
449 if (frame->curline % 32 == 0)
450 cb = 0, cg = cr = 0xFF;
451 else if (i % 32 == 0) {
452 if (frame->curline % 32 == 1)
453 num_cell++;
454 cb = 0, cg = cr = 0xFF;
455 } else {
456 cb =
457 ((num_cell * 7) +
458 num_pass) & 0xFF;
459 cg =
460 ((num_cell * 5) +
461 num_pass * 2) & 0xFF;
462 cr =
463 ((num_cell * 3) +
464 num_pass * 3) & 0xFF;
465 }
466 } else {
467 /* Just the blue screen */
468 }
469
470 *f++ = cb;
471 *f++ = cg;
472 *f++ = cr;
473 scan_length += 3;
474 }
475 }
476
477 frame->grabstate = FrameState_Done;
478 frame->scanlength += scan_length;
479 ++num_pass;
480
481 }
482
483 /*
484 * usbvision_decompress_alloc()
485 *
486 * allocates intermediate buffer for decompression
487 */
488 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
489 {
490 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
491 usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
492 if (usbvision->IntraFrameBuffer == NULL) {
493 dev_err(&usbvision->dev->dev,
494 "%s: unable to allocate %d for compr. frame buffer\n",
495 __func__, IFB_size);
496 return -ENOMEM;
497 }
498 return 0;
499 }
500
501 /*
502 * usbvision_decompress_free()
503 *
504 * frees intermediate buffer for decompression
505 */
506 void usbvision_decompress_free(struct usb_usbvision *usbvision)
507 {
508 vfree(usbvision->IntraFrameBuffer);
509 usbvision->IntraFrameBuffer = NULL;
510
511 }
512
513 /************************************************************
514 * Here comes the data parsing stuff that is run as interrupt
515 ************************************************************/
516 /*
517 * usbvision_find_header()
518 *
519 * Locate one of supported header markers in the scratch buffer.
520 */
521 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
522 {
523 struct usbvision_frame *frame;
524 int foundHeader = 0;
525
526 frame = usbvision->curFrame;
527
528 while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
529 // found header in scratch
530 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
531 frame->isocHeader.magic_2,
532 frame->isocHeader.magic_1,
533 frame->isocHeader.headerLength,
534 frame->isocHeader.frameNum,
535 frame->isocHeader.framePhase,
536 frame->isocHeader.frameLatency,
537 frame->isocHeader.dataFormat,
538 frame->isocHeader.formatParam,
539 frame->isocHeader.frameWidth,
540 frame->isocHeader.frameHeight);
541
542 if (usbvision->requestIntra) {
543 if (frame->isocHeader.formatParam & 0x80) {
544 foundHeader = 1;
545 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
546 usbvision_unrequest_intra(usbvision);
547 break;
548 }
549 }
550 else {
551 foundHeader = 1;
552 break;
553 }
554 }
555
556 if (foundHeader) {
557 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
558 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
559 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
560 }
561 else { // no header found
562 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
563 scratch_reset(usbvision);
564 return ParseState_EndParse;
565 }
566
567 // found header
568 if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
569 //check isocHeader.frameNum for lost frames
570 if (usbvision->lastIsocFrameNum >= 0) {
571 if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
572 // unexpected frame drop: need to request new intra frame
573 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
574 usbvision_request_intra(usbvision);
575 return ParseState_NextFrame;
576 }
577 }
578 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
579 }
580 usbvision->header_count++;
581 frame->scanstate = ScanState_Lines;
582 frame->curline = 0;
583
584 if (force_testpattern) {
585 usbvision_testpattern(usbvision, 1, 1);
586 return ParseState_NextFrame;
587 }
588 return ParseState_Continue;
589 }
590
591 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
592 long *pcopylen)
593 {
594 volatile struct usbvision_frame *frame;
595 unsigned char *f;
596 int len;
597 int i;
598 unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
599 unsigned char rv, gv, bv; // RGB components
600 int clipmask_index, bytes_per_pixel;
601 int stretch_bytes, clipmask_add;
602
603 frame = usbvision->curFrame;
604 f = frame->data + (frame->v4l2_linesize * frame->curline);
605
606 /* Make sure there's enough data for the entire line */
607 len = (frame->isocHeader.frameWidth * 2)+5;
608 if (scratch_len(usbvision) < len) {
609 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
610 return ParseState_Out;
611 }
612
613 if ((frame->curline + 1) >= frame->frmheight) {
614 return ParseState_NextFrame;
615 }
616
617 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
618 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
619 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
620 clipmask_add = usbvision->stretch_width;
621
622 for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
623
624 scratch_get(usbvision, &yuyv[0], 4);
625
626 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
627 *f++ = yuyv[0]; // Y
628 *f++ = yuyv[3]; // U
629 }
630 else {
631
632 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
633 switch (frame->v4l2_format.format) {
634 case V4L2_PIX_FMT_RGB565:
635 *f++ = (0x1F & rv) |
636 (0xE0 & (gv << 5));
637 *f++ = (0x07 & (gv >> 3)) |
638 (0xF8 & bv);
639 break;
640 case V4L2_PIX_FMT_RGB24:
641 *f++ = rv;
642 *f++ = gv;
643 *f++ = bv;
644 break;
645 case V4L2_PIX_FMT_RGB32:
646 *f++ = rv;
647 *f++ = gv;
648 *f++ = bv;
649 f++;
650 break;
651 case V4L2_PIX_FMT_RGB555:
652 *f++ = (0x1F & rv) |
653 (0xE0 & (gv << 5));
654 *f++ = (0x03 & (gv >> 3)) |
655 (0x7C & (bv << 2));
656 break;
657 }
658 }
659 clipmask_index += clipmask_add;
660 f += stretch_bytes;
661
662 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
663 *f++ = yuyv[2]; // Y
664 *f++ = yuyv[1]; // V
665 }
666 else {
667
668 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
669 switch (frame->v4l2_format.format) {
670 case V4L2_PIX_FMT_RGB565:
671 *f++ = (0x1F & rv) |
672 (0xE0 & (gv << 5));
673 *f++ = (0x07 & (gv >> 3)) |
674 (0xF8 & bv);
675 break;
676 case V4L2_PIX_FMT_RGB24:
677 *f++ = rv;
678 *f++ = gv;
679 *f++ = bv;
680 break;
681 case V4L2_PIX_FMT_RGB32:
682 *f++ = rv;
683 *f++ = gv;
684 *f++ = bv;
685 f++;
686 break;
687 case V4L2_PIX_FMT_RGB555:
688 *f++ = (0x1F & rv) |
689 (0xE0 & (gv << 5));
690 *f++ = (0x03 & (gv >> 3)) |
691 (0x7C & (bv << 2));
692 break;
693 }
694 }
695 clipmask_index += clipmask_add;
696 f += stretch_bytes;
697 }
698
699 frame->curline += usbvision->stretch_height;
700 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
701
702 if (frame->curline >= frame->frmheight) {
703 return ParseState_NextFrame;
704 }
705 else {
706 return ParseState_Continue;
707 }
708 }
709
710 /* The decompression routine */
711 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
712 unsigned char *Decompressed, int *StartPos,
713 int *BlockTypeStartPos, int Len)
714 {
715 int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
716 unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
717
718 Integrator = 0;
719 Pos = *StartPos;
720 BlockTypePos = *BlockTypeStartPos;
721 MaxPos = 396; //Pos + Len;
722 ExtraPos = Pos;
723 BlockLen = 0;
724 BlockByte = 0;
725 BlockCode = 0;
726 BlockType = 0;
727 BlockTypeByte = 0;
728 BlockTypeLen = 0;
729 RestPixel = Len;
730
731 for (Idx = 0; Idx < Len; Idx++) {
732
733 if (BlockLen == 0) {
734 if (BlockTypeLen==0) {
735 BlockTypeByte = Compressed[BlockTypePos];
736 BlockTypePos++;
737 BlockTypeLen = 4;
738 }
739 BlockType = (BlockTypeByte & 0xC0) >> 6;
740
741 //statistic:
742 usbvision->ComprBlockTypes[BlockType]++;
743
744 Pos = ExtraPos;
745 if (BlockType == 0) {
746 if(RestPixel >= 24) {
747 Idx += 23;
748 RestPixel -= 24;
749 Integrator = Decompressed[Idx];
750 } else {
751 Idx += RestPixel - 1;
752 RestPixel = 0;
753 }
754 } else {
755 BlockCode = Compressed[Pos];
756 Pos++;
757 if (RestPixel >= 24) {
758 BlockLen = 24;
759 } else {
760 BlockLen = RestPixel;
761 }
762 RestPixel -= BlockLen;
763 ExtraPos = Pos + (BlockLen / 4);
764 }
765 BlockTypeByte <<= 2;
766 BlockTypeLen -= 1;
767 }
768 if (BlockLen > 0) {
769 if ((BlockLen%4) == 0) {
770 BlockByte = Compressed[Pos];
771 Pos++;
772 }
773 if (BlockType == 1) { //inter Block
774 Integrator = Decompressed[Idx];
775 }
776 switch (BlockByte & 0xC0) {
777 case 0x03<<6:
778 Integrator += Compressed[ExtraPos];
779 ExtraPos++;
780 break;
781 case 0x02<<6:
782 Integrator += BlockCode;
783 break;
784 case 0x00:
785 Integrator -= BlockCode;
786 break;
787 }
788 Decompressed[Idx] = Integrator;
789 BlockByte <<= 2;
790 BlockLen -= 1;
791 }
792 }
793 *StartPos = ExtraPos;
794 *BlockTypeStartPos = BlockTypePos;
795 return Idx;
796 }
797
798
799 /*
800 * usbvision_parse_compress()
801 *
802 * Parse compressed frame from the scratch buffer, put
803 * decoded RGB value into the current frame buffer and add the written
804 * number of bytes (RGB) to the *pcopylen.
805 *
806 */
807 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
808 long *pcopylen)
809 {
810 #define USBVISION_STRIP_MAGIC 0x5A
811 #define USBVISION_STRIP_LEN_MAX 400
812 #define USBVISION_STRIP_HEADER_LEN 3
813
814 struct usbvision_frame *frame;
815 unsigned char *f,*u = NULL ,*v = NULL;
816 unsigned char StripData[USBVISION_STRIP_LEN_MAX];
817 unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
818 int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
819 int clipmask_index, bytes_per_pixel, rc;
820 int imageSize;
821 unsigned char rv, gv, bv;
822 static unsigned char *Y, *U, *V;
823
824 frame = usbvision->curFrame;
825 imageSize = frame->frmwidth * frame->frmheight;
826 if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
827 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) { // this is a planar format
828 //... v4l2_linesize not used here.
829 f = frame->data + (frame->width * frame->curline);
830 } else
831 f = frame->data + (frame->v4l2_linesize * frame->curline);
832
833 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
834 // get base of u and b planes add halfoffset
835
836 u = frame->data
837 + imageSize
838 + (frame->frmwidth >>1) * frame->curline ;
839 v = u + (imageSize >>1 );
840
841 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
842
843 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
844 u = v + (imageSize >>2) ;
845 }
846
847 if (frame->curline == 0) {
848 usbvision_adjust_compression(usbvision);
849 }
850
851 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
852 return ParseState_Out;
853 }
854
855 //get strip header without changing the scratch_read_ptr
856 scratch_set_extra_ptr(usbvision, &StripPtr, 0);
857 scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
858 USBVISION_STRIP_HEADER_LEN);
859
860 if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
861 // wrong strip magic
862 usbvision->stripMagicErrors++;
863 return ParseState_NextFrame;
864 }
865
866 if (frame->curline != (int)StripHeader[2]) {
867 //line number missmatch error
868 usbvision->stripLineNumberErrors++;
869 }
870
871 StripLen = 2 * (unsigned int)StripHeader[1];
872 if (StripLen > USBVISION_STRIP_LEN_MAX) {
873 // strip overrun
874 // I think this never happens
875 usbvision_request_intra(usbvision);
876 }
877
878 if (scratch_len(usbvision) < StripLen) {
879 //there is not enough data for the strip
880 return ParseState_Out;
881 }
882
883 if (usbvision->IntraFrameBuffer) {
884 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
885 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
886 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
887 }
888 else {
889 return ParseState_NextFrame;
890 }
891
892 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
893 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
894
895 scratch_get(usbvision, StripData, StripLen);
896
897 IdxEnd = frame->frmwidth;
898 BlockTypePos = USBVISION_STRIP_HEADER_LEN;
899 StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
900 BlockPos = StartBlockPos;
901
902 usbvision->BlockPos = BlockPos;
903
904 if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
905 //return ParseState_Continue;
906 }
907 if (StripLen > usbvision->maxStripLen) {
908 usbvision->maxStripLen = StripLen;
909 }
910
911 if (frame->curline%2) {
912 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
913 //return ParseState_Continue;
914 }
915 }
916 else {
917 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
918 //return ParseState_Continue;
919 }
920 }
921
922 if (BlockPos > usbvision->comprBlockPos) {
923 usbvision->comprBlockPos = BlockPos;
924 }
925 if (BlockPos > StripLen) {
926 usbvision->stripLenErrors++;
927 }
928
929 for (Idx = 0; Idx < IdxEnd; Idx++) {
930 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
931 *f++ = Y[Idx];
932 *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
933 }
934 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
935 *f++ = Y[Idx];
936 if ( Idx & 0x01)
937 *u++ = U[Idx>>1] ;
938 else
939 *v++ = V[Idx>>1];
940 }
941 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
942 *f++ = Y [Idx];
943 if ( !(( Idx & 0x01 ) | ( frame->curline & 0x01 )) ){
944
945 /* only need do this for 1 in 4 pixels */
946 /* intraframe buffer is YUV420 format */
947
948 *u++ = U[Idx >>1];
949 *v++ = V[Idx >>1];
950 }
951
952 }
953 else {
954 YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
955 switch (frame->v4l2_format.format) {
956 case V4L2_PIX_FMT_GREY:
957 *f++ = Y[Idx];
958 break;
959 case V4L2_PIX_FMT_RGB555:
960 *f++ = (0x1F & rv) |
961 (0xE0 & (gv << 5));
962 *f++ = (0x03 & (gv >> 3)) |
963 (0x7C & (bv << 2));
964 break;
965 case V4L2_PIX_FMT_RGB565:
966 *f++ = (0x1F & rv) |
967 (0xE0 & (gv << 5));
968 *f++ = (0x07 & (gv >> 3)) |
969 (0xF8 & bv);
970 break;
971 case V4L2_PIX_FMT_RGB24:
972 *f++ = rv;
973 *f++ = gv;
974 *f++ = bv;
975 break;
976 case V4L2_PIX_FMT_RGB32:
977 *f++ = rv;
978 *f++ = gv;
979 *f++ = bv;
980 f++;
981 break;
982 }
983 }
984 clipmask_index++;
985 }
986 /* Deal with non-integer no. of bytes for YUV420P */
987 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
988 *pcopylen += frame->v4l2_linesize;
989 else
990 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
991
992 frame->curline += 1;
993
994 if (frame->curline >= frame->frmheight) {
995 return ParseState_NextFrame;
996 }
997 else {
998 return ParseState_Continue;
999 }
1000
1001 }
1002
1003
1004 /*
1005 * usbvision_parse_lines_420()
1006 *
1007 * Parse two lines from the scratch buffer, put
1008 * decoded RGB value into the current frame buffer and add the written
1009 * number of bytes (RGB) to the *pcopylen.
1010 *
1011 */
1012 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
1013 long *pcopylen)
1014 {
1015 struct usbvision_frame *frame;
1016 unsigned char *f_even = NULL, *f_odd = NULL;
1017 unsigned int pixel_per_line, block;
1018 int pixel, block_split;
1019 int y_ptr, u_ptr, v_ptr, y_odd_offset;
1020 const int y_block_size = 128;
1021 const int uv_block_size = 64;
1022 const int sub_block_size = 32;
1023 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
1024 const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1025 unsigned char y[2], u, v; /* YUV components */
1026 int y_, u_, v_, vb, uvg, ur;
1027 int r_, g_, b_; /* RGB components */
1028 unsigned char g;
1029 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1030 int clipmask_add, stretch_bytes;
1031
1032 frame = usbvision->curFrame;
1033 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1034 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1035
1036 /* Make sure there's enough data for the entire line */
1037 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1038 /* I need two lines to decode the color */
1039 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1040 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1041 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1042 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
1043 clipmask_add = usbvision->stretch_width;
1044 pixel_per_line = frame->isocHeader.frameWidth;
1045
1046 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1047 //printk(KERN_DEBUG "out of data, need %d\n", len);
1048 return ParseState_Out;
1049 }
1050
1051 if ((frame->curline + 1) >= frame->frmheight) {
1052 return ParseState_NextFrame;
1053 }
1054
1055 block_split = (pixel_per_line%y_block_size) ? 1 : 0; //are some blocks splitted into different lines?
1056
1057 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1058 + block_split * uv_block_size;
1059
1060 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1061 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1062 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1063 + (4 - block_split) * sub_block_size);
1064
1065 for (block = 0; block < (pixel_per_line / sub_block_size);
1066 block++) {
1067
1068
1069 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1070 scratch_get(usbvision, &y[0], 2);
1071 scratch_get_extra(usbvision, &u, &u_ptr, 1);
1072 scratch_get_extra(usbvision, &v, &v_ptr, 1);
1073
1074 //I don't use the YUV_TO_RGB macro for better performance
1075 v_ = v - 128;
1076 u_ = u - 128;
1077 vb = 132252 * v_;
1078 uvg= -53281 * u_ - 25625 * v_;
1079 ur = 104595 * u_;
1080
1081 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1082 *f_even++ = y[0];
1083 *f_even++ = v;
1084 }
1085 else {
1086 y_ = 76284 * (y[0] - 16);
1087
1088 b_ = (y_ + vb) >> 16;
1089 g_ = (y_ + uvg)>> 16;
1090 r_ = (y_ + ur) >> 16;
1091
1092 switch (frame->v4l2_format.format) {
1093 case V4L2_PIX_FMT_RGB565:
1094 g = LIMIT_RGB(g_);
1095 *f_even++ =
1096 (0x1F & LIMIT_RGB(r_)) |
1097 (0xE0 & (g << 5));
1098 *f_even++ =
1099 (0x07 & (g >> 3)) |
1100 (0xF8 & LIMIT_RGB(b_));
1101 break;
1102 case V4L2_PIX_FMT_RGB24:
1103 *f_even++ = LIMIT_RGB(r_);
1104 *f_even++ = LIMIT_RGB(g_);
1105 *f_even++ = LIMIT_RGB(b_);
1106 break;
1107 case V4L2_PIX_FMT_RGB32:
1108 *f_even++ = LIMIT_RGB(r_);
1109 *f_even++ = LIMIT_RGB(g_);
1110 *f_even++ = LIMIT_RGB(b_);
1111 f_even++;
1112 break;
1113 case V4L2_PIX_FMT_RGB555:
1114 g = LIMIT_RGB(g_);
1115 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1116 (0xE0 & (g << 5));
1117 *f_even++ = (0x03 & (g >> 3)) |
1118 (0x7C & (LIMIT_RGB(b_) << 2));
1119 break;
1120 }
1121 }
1122 clipmask_even_index += clipmask_add;
1123 f_even += stretch_bytes;
1124
1125 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1126 *f_even++ = y[1];
1127 *f_even++ = u;
1128 }
1129 else {
1130 y_ = 76284 * (y[1] - 16);
1131
1132 b_ = (y_ + vb) >> 16;
1133 g_ = (y_ + uvg)>> 16;
1134 r_ = (y_ + ur) >> 16;
1135
1136 switch (frame->v4l2_format.format) {
1137 case V4L2_PIX_FMT_RGB565:
1138 g = LIMIT_RGB(g_);
1139 *f_even++ =
1140 (0x1F & LIMIT_RGB(r_)) |
1141 (0xE0 & (g << 5));
1142 *f_even++ =
1143 (0x07 & (g >> 3)) |
1144 (0xF8 & LIMIT_RGB(b_));
1145 break;
1146 case V4L2_PIX_FMT_RGB24:
1147 *f_even++ = LIMIT_RGB(r_);
1148 *f_even++ = LIMIT_RGB(g_);
1149 *f_even++ = LIMIT_RGB(b_);
1150 break;
1151 case V4L2_PIX_FMT_RGB32:
1152 *f_even++ = LIMIT_RGB(r_);
1153 *f_even++ = LIMIT_RGB(g_);
1154 *f_even++ = LIMIT_RGB(b_);
1155 f_even++;
1156 break;
1157 case V4L2_PIX_FMT_RGB555:
1158 g = LIMIT_RGB(g_);
1159 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1160 (0xE0 & (g << 5));
1161 *f_even++ = (0x03 & (g >> 3)) |
1162 (0x7C & (LIMIT_RGB(b_) << 2));
1163 break;
1164 }
1165 }
1166 clipmask_even_index += clipmask_add;
1167 f_even += stretch_bytes;
1168
1169 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1170
1171 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1172 *f_odd++ = y[0];
1173 *f_odd++ = v;
1174 }
1175 else {
1176 y_ = 76284 * (y[0] - 16);
1177
1178 b_ = (y_ + vb) >> 16;
1179 g_ = (y_ + uvg)>> 16;
1180 r_ = (y_ + ur) >> 16;
1181
1182 switch (frame->v4l2_format.format) {
1183 case V4L2_PIX_FMT_RGB565:
1184 g = LIMIT_RGB(g_);
1185 *f_odd++ =
1186 (0x1F & LIMIT_RGB(r_)) |
1187 (0xE0 & (g << 5));
1188 *f_odd++ =
1189 (0x07 & (g >> 3)) |
1190 (0xF8 & LIMIT_RGB(b_));
1191 break;
1192 case V4L2_PIX_FMT_RGB24:
1193 *f_odd++ = LIMIT_RGB(r_);
1194 *f_odd++ = LIMIT_RGB(g_);
1195 *f_odd++ = LIMIT_RGB(b_);
1196 break;
1197 case V4L2_PIX_FMT_RGB32:
1198 *f_odd++ = LIMIT_RGB(r_);
1199 *f_odd++ = LIMIT_RGB(g_);
1200 *f_odd++ = LIMIT_RGB(b_);
1201 f_odd++;
1202 break;
1203 case V4L2_PIX_FMT_RGB555:
1204 g = LIMIT_RGB(g_);
1205 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1206 (0xE0 & (g << 5));
1207 *f_odd++ = (0x03 & (g >> 3)) |
1208 (0x7C & (LIMIT_RGB(b_) << 2));
1209 break;
1210 }
1211 }
1212 clipmask_odd_index += clipmask_add;
1213 f_odd += stretch_bytes;
1214
1215 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1216 *f_odd++ = y[1];
1217 *f_odd++ = u;
1218 }
1219 else {
1220 y_ = 76284 * (y[1] - 16);
1221
1222 b_ = (y_ + vb) >> 16;
1223 g_ = (y_ + uvg)>> 16;
1224 r_ = (y_ + ur) >> 16;
1225
1226 switch (frame->v4l2_format.format) {
1227 case V4L2_PIX_FMT_RGB565:
1228 g = LIMIT_RGB(g_);
1229 *f_odd++ =
1230 (0x1F & LIMIT_RGB(r_)) |
1231 (0xE0 & (g << 5));
1232 *f_odd++ =
1233 (0x07 & (g >> 3)) |
1234 (0xF8 & LIMIT_RGB(b_));
1235 break;
1236 case V4L2_PIX_FMT_RGB24:
1237 *f_odd++ = LIMIT_RGB(r_);
1238 *f_odd++ = LIMIT_RGB(g_);
1239 *f_odd++ = LIMIT_RGB(b_);
1240 break;
1241 case V4L2_PIX_FMT_RGB32:
1242 *f_odd++ = LIMIT_RGB(r_);
1243 *f_odd++ = LIMIT_RGB(g_);
1244 *f_odd++ = LIMIT_RGB(b_);
1245 f_odd++;
1246 break;
1247 case V4L2_PIX_FMT_RGB555:
1248 g = LIMIT_RGB(g_);
1249 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1250 (0xE0 & (g << 5));
1251 *f_odd++ = (0x03 & (g >> 3)) |
1252 (0x7C & (LIMIT_RGB(b_) << 2));
1253 break;
1254 }
1255 }
1256 clipmask_odd_index += clipmask_add;
1257 f_odd += stretch_bytes;
1258 }
1259
1260 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1261 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1262 * sub_block_size);
1263 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1264 * sub_block_size);
1265 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1266 * sub_block_size);
1267 }
1268
1269 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1270 + block_split * sub_block_size);
1271
1272 frame->curline += 2 * usbvision->stretch_height;
1273 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1274
1275 if (frame->curline >= frame->frmheight)
1276 return ParseState_NextFrame;
1277 else
1278 return ParseState_Continue;
1279 }
1280
1281 /*
1282 * usbvision_parse_data()
1283 *
1284 * Generic routine to parse the scratch buffer. It employs either
1285 * usbvision_find_header() or usbvision_parse_lines() to do most
1286 * of work.
1287 *
1288 */
1289 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1290 {
1291 struct usbvision_frame *frame;
1292 enum ParseState newstate;
1293 long copylen = 0;
1294 unsigned long lock_flags;
1295
1296 frame = usbvision->curFrame;
1297
1298 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1299
1300 while (1) {
1301
1302 newstate = ParseState_Out;
1303 if (scratch_len(usbvision)) {
1304 if (frame->scanstate == ScanState_Scanning) {
1305 newstate = usbvision_find_header(usbvision);
1306 }
1307 else if (frame->scanstate == ScanState_Lines) {
1308 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1309 newstate = usbvision_parse_lines_420(usbvision, &copylen);
1310 }
1311 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1312 newstate = usbvision_parse_lines_422(usbvision, &copylen);
1313 }
1314 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1315 newstate = usbvision_parse_compress(usbvision, &copylen);
1316 }
1317
1318 }
1319 }
1320 if (newstate == ParseState_Continue) {
1321 continue;
1322 }
1323 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1324 break;
1325 }
1326 else {
1327 return; /* ParseState_EndParse */
1328 }
1329 }
1330
1331 if (newstate == ParseState_NextFrame) {
1332 frame->grabstate = FrameState_Done;
1333 do_gettimeofday(&(frame->timestamp));
1334 frame->sequence = usbvision->frame_num;
1335
1336 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1337 list_move_tail(&(frame->frame), &usbvision->outqueue);
1338 usbvision->curFrame = NULL;
1339 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1340
1341 usbvision->frame_num++;
1342
1343 /* This will cause the process to request another frame. */
1344 if (waitqueue_active(&usbvision->wait_frame)) {
1345 PDEBUG(DBG_PARSE, "Wake up !");
1346 wake_up_interruptible(&usbvision->wait_frame);
1347 }
1348 }
1349 else
1350 frame->grabstate = FrameState_Grabbing;
1351
1352
1353 /* Update the frame's uncompressed length. */
1354 frame->scanlength += copylen;
1355 }
1356
1357
1358 /*
1359 * Make all of the blocks of data contiguous
1360 */
1361 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1362 struct urb *urb)
1363 {
1364 unsigned char *packet_data;
1365 int i, totlen = 0;
1366
1367 for (i = 0; i < urb->number_of_packets; i++) {
1368 int packet_len = urb->iso_frame_desc[i].actual_length;
1369 int packet_stat = urb->iso_frame_desc[i].status;
1370
1371 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1372
1373 /* Detect and ignore errored packets */
1374 if (packet_stat) { // packet_stat != 0 ?????????????
1375 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1376 usbvision->isocErrCount++;
1377 continue;
1378 }
1379
1380 /* Detect and ignore empty packets */
1381 if (packet_len < 0) {
1382 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1383 usbvision->isocSkipCount++;
1384 continue;
1385 }
1386 else if (packet_len == 0) { /* Frame end ????? */
1387 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1388 usbvision->isocstate=IsocState_NoFrame;
1389 usbvision->isocSkipCount++;
1390 continue;
1391 }
1392 else if (packet_len > usbvision->isocPacketSize) {
1393 PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1394 usbvision->isocSkipCount++;
1395 continue;
1396 }
1397
1398 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1399
1400 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1401 usbvision->isocstate=IsocState_InFrame;
1402 scratch_mark_header(usbvision);
1403 usbvision_measure_bandwidth(usbvision);
1404 PDEBUG(DBG_ISOC, "packet with header");
1405 }
1406
1407 /*
1408 * If usbvision continues to feed us with data but there is no
1409 * consumption (if, for example, V4L client fell asleep) we
1410 * may overflow the buffer. We have to move old data over to
1411 * free room for new data. This is bad for old data. If we
1412 * just drop new data then it's bad for new data... choose
1413 * your favorite evil here.
1414 */
1415 if (scratch_free(usbvision) < packet_len) {
1416
1417 usbvision->scratch_ovf_count++;
1418 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1419 scratch_len(usbvision), packet_len);
1420 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1421 }
1422
1423 /* Now we know that there is enough room in scratch buffer */
1424 scratch_put(usbvision, packet_data, packet_len);
1425 totlen += packet_len;
1426 usbvision->isocDataCount += packet_len;
1427 usbvision->isocPacketCount++;
1428 }
1429 #if ENABLE_HEXDUMP
1430 if (totlen > 0) {
1431 static int foo;
1432 if (foo < 1) {
1433 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1434 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1435 ++foo;
1436 }
1437 }
1438 #endif
1439 return totlen;
1440 }
1441
1442 static void usbvision_isocIrq(struct urb *urb)
1443 {
1444 int errCode = 0;
1445 int len;
1446 struct usb_usbvision *usbvision = urb->context;
1447 int i;
1448 unsigned long startTime = jiffies;
1449 struct usbvision_frame **f;
1450
1451 /* We don't want to do anything if we are about to be removed! */
1452 if (!USBVISION_IS_OPERATIONAL(usbvision))
1453 return;
1454
1455 /* any urb with wrong status is ignored without acknowledgement */
1456 if (urb->status == -ENOENT) {
1457 return;
1458 }
1459
1460 f = &usbvision->curFrame;
1461
1462 /* Manage streaming interruption */
1463 if (usbvision->streaming == Stream_Interrupt) {
1464 usbvision->streaming = Stream_Idle;
1465 if ((*f)) {
1466 (*f)->grabstate = FrameState_Ready;
1467 (*f)->scanstate = ScanState_Scanning;
1468 }
1469 PDEBUG(DBG_IRQ, "stream interrupted");
1470 wake_up_interruptible(&usbvision->wait_stream);
1471 }
1472
1473 /* Copy the data received into our scratch buffer */
1474 len = usbvision_compress_isochronous(usbvision, urb);
1475
1476 usbvision->isocUrbCount++;
1477 usbvision->urb_length = len;
1478
1479 if (usbvision->streaming == Stream_On) {
1480
1481 /* If we collected enough data let's parse! */
1482 if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) &&
1483 (!list_empty(&(usbvision->inqueue))) ) {
1484 if (!(*f)) {
1485 (*f) = list_entry(usbvision->inqueue.next,
1486 struct usbvision_frame,
1487 frame);
1488 }
1489 usbvision_parse_data(usbvision);
1490 }
1491 else {
1492 /*If we don't have a frame
1493 we're current working on, complain */
1494 PDEBUG(DBG_IRQ,
1495 "received data, but no one needs it");
1496 scratch_reset(usbvision);
1497 }
1498 }
1499 else {
1500 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1501 scratch_reset(usbvision);
1502 }
1503
1504 usbvision->timeInIrq += jiffies - startTime;
1505
1506 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1507 urb->iso_frame_desc[i].status = 0;
1508 urb->iso_frame_desc[i].actual_length = 0;
1509 }
1510
1511 urb->status = 0;
1512 urb->dev = usbvision->dev;
1513 errCode = usb_submit_urb (urb, GFP_ATOMIC);
1514
1515 if(errCode) {
1516 dev_err(&usbvision->dev->dev,
1517 "%s: usb_submit_urb failed: error %d\n",
1518 __func__, errCode);
1519 }
1520
1521 return;
1522 }
1523
1524 /*************************************/
1525 /* Low level usbvision access functions */
1526 /*************************************/
1527
1528 /*
1529 * usbvision_read_reg()
1530 *
1531 * return < 0 -> Error
1532 * >= 0 -> Data
1533 */
1534
1535 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1536 {
1537 int errCode = 0;
1538 unsigned char buffer[1];
1539
1540 if (!USBVISION_IS_OPERATIONAL(usbvision))
1541 return -1;
1542
1543 errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1544 USBVISION_OP_CODE,
1545 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1546 0, (__u16) reg, buffer, 1, HZ);
1547
1548 if (errCode < 0) {
1549 dev_err(&usbvision->dev->dev,
1550 "%s: failed: error %d\n", __func__, errCode);
1551 return errCode;
1552 }
1553 return buffer[0];
1554 }
1555
1556 /*
1557 * usbvision_write_reg()
1558 *
1559 * return 1 -> Reg written
1560 * 0 -> usbvision is not yet ready
1561 * -1 -> Something went wrong
1562 */
1563
1564 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1565 unsigned char value)
1566 {
1567 int errCode = 0;
1568
1569 if (!USBVISION_IS_OPERATIONAL(usbvision))
1570 return 0;
1571
1572 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1573 USBVISION_OP_CODE,
1574 USB_DIR_OUT | USB_TYPE_VENDOR |
1575 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1576
1577 if (errCode < 0) {
1578 dev_err(&usbvision->dev->dev,
1579 "%s: failed: error %d\n", __func__, errCode);
1580 }
1581 return errCode;
1582 }
1583
1584
1585 static void usbvision_ctrlUrb_complete(struct urb *urb)
1586 {
1587 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1588
1589 PDEBUG(DBG_IRQ, "");
1590 usbvision->ctrlUrbBusy = 0;
1591 if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1592 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1593 }
1594 }
1595
1596
1597 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1598 unsigned char *data, int len)
1599 {
1600 int errCode = 0;
1601
1602 PDEBUG(DBG_IRQ, "");
1603 if (len > 8) {
1604 return -EFAULT;
1605 }
1606 if (usbvision->ctrlUrbBusy) {
1607 return -EBUSY;
1608 }
1609 usbvision->ctrlUrbBusy = 1;
1610
1611 usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1612 usbvision->ctrlUrbSetup.bRequest = USBVISION_OP_CODE;
1613 usbvision->ctrlUrbSetup.wValue = 0;
1614 usbvision->ctrlUrbSetup.wIndex = cpu_to_le16(address);
1615 usbvision->ctrlUrbSetup.wLength = cpu_to_le16(len);
1616 usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1617 usb_sndctrlpipe(usbvision->dev, 1),
1618 (unsigned char *)&usbvision->ctrlUrbSetup,
1619 (void *)usbvision->ctrlUrbBuffer, len,
1620 usbvision_ctrlUrb_complete,
1621 (void *)usbvision);
1622
1623 memcpy(usbvision->ctrlUrbBuffer, data, len);
1624
1625 errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1626 if (errCode < 0) {
1627 // error in usb_submit_urb()
1628 usbvision->ctrlUrbBusy = 0;
1629 }
1630 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1631 return errCode;
1632 }
1633
1634
1635 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1636 {
1637 int errCode = 0;
1638
1639 usbvision->lastIsocFrameNum = -1;
1640 usbvision->isocDataCount = 0;
1641 usbvision->isocPacketCount = 0;
1642 usbvision->isocSkipCount = 0;
1643 usbvision->comprLevel = 50;
1644 usbvision->lastComprLevel = -1;
1645 usbvision->isocUrbCount = 0;
1646 usbvision->requestIntra = 1;
1647 usbvision->isocMeasureBandwidthCount = 0;
1648
1649 return errCode;
1650 }
1651
1652 /* this function measures the used bandwidth since last call
1653 * return: 0 : no error
1654 * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1655 */
1656 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1657 {
1658 int errCode = 0;
1659
1660 if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1661 usbvision->isocMeasureBandwidthCount++;
1662 return errCode;
1663 }
1664 if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1665 usbvision->usedBandwidth = usbvision->isocDataCount /
1666 (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1667 100 / usbvision->isocPacketSize;
1668 }
1669 usbvision->isocMeasureBandwidthCount = 0;
1670 usbvision->isocDataCount = 0;
1671 usbvision->isocPacketCount = 0;
1672 usbvision->isocSkipCount = 0;
1673 return errCode;
1674 }
1675
1676 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1677 {
1678 int errCode = 0;
1679 unsigned char buffer[6];
1680
1681 PDEBUG(DBG_IRQ, "");
1682 if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1683 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1684 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1685 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1686 int distorsion;
1687 if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1688 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM Threshold 1
1689 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM Threshold 2
1690 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1691 buffer[2] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (inter)
1692 buffer[3] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (intra)
1693 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1694 buffer[4] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (inter)
1695 buffer[5] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (intra)
1696 }
1697 else { //BRIDGE_NT1003
1698 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM threshold 1
1699 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM threshold 2
1700 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1701 buffer[2] = (unsigned char)(distorsion & 0xFF); // distorsion threshold bit0-7
1702 buffer[3] = 0; //(unsigned char)((distorsion >> 8) & 0x0F); // distorsion threshold bit 8-11
1703 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1704 buffer[4] = (unsigned char)(distorsion & 0xFF); // maximum distorsion bit0-7
1705 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01); // maximum distorsion bit 8
1706 }
1707 errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1708 if (errCode == 0){
1709 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1710 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1711 usbvision->lastComprLevel = usbvision->comprLevel;
1712 }
1713 }
1714 }
1715 return errCode;
1716 }
1717
1718 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1719 {
1720 int errCode = 0;
1721 unsigned char buffer[1];
1722
1723 PDEBUG(DBG_IRQ, "");
1724 usbvision->requestIntra = 1;
1725 buffer[0] = 1;
1726 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1727 return errCode;
1728 }
1729
1730 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1731 {
1732 int errCode = 0;
1733 unsigned char buffer[1];
1734
1735 PDEBUG(DBG_IRQ, "");
1736 usbvision->requestIntra = 0;
1737 buffer[0] = 0;
1738 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1739 return errCode;
1740 }
1741
1742 /*******************************
1743 * usbvision utility functions
1744 *******************************/
1745
1746 int usbvision_power_off(struct usb_usbvision *usbvision)
1747 {
1748 int errCode = 0;
1749
1750 PDEBUG(DBG_FUNC, "");
1751
1752 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1753 if (errCode == 1) {
1754 usbvision->power = 0;
1755 }
1756 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1757 return errCode;
1758 }
1759
1760 /*
1761 * usbvision_set_video_format()
1762 *
1763 */
1764 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1765 {
1766 static const char proc[] = "usbvision_set_video_format";
1767 int rc;
1768 unsigned char value[2];
1769
1770 if (!USBVISION_IS_OPERATIONAL(usbvision))
1771 return 0;
1772
1773 PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1774
1775 if ((format != ISOC_MODE_YUV422)
1776 && (format != ISOC_MODE_YUV420)
1777 && (format != ISOC_MODE_COMPRESS)) {
1778 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1779 format);
1780 format = ISOC_MODE_YUV420;
1781 }
1782 value[0] = 0x0A; //TODO: See the effect of the filter
1783 value[1] = format; // Sets the VO_MODE register which follows FILT_CONT
1784 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1785 USBVISION_OP_CODE,
1786 USB_DIR_OUT | USB_TYPE_VENDOR |
1787 USB_RECIP_ENDPOINT, 0,
1788 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1789
1790 if (rc < 0) {
1791 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1792 "reconnect or reload driver.\n", proc, rc);
1793 }
1794 usbvision->isocMode = format;
1795 return rc;
1796 }
1797
1798 /*
1799 * usbvision_set_output()
1800 *
1801 */
1802
1803 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1804 int height)
1805 {
1806 int errCode = 0;
1807 int UsbWidth, UsbHeight;
1808 unsigned int frameRate=0, frameDrop=0;
1809 unsigned char value[4];
1810
1811 if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1812 return 0;
1813 }
1814
1815 if (width > MAX_USB_WIDTH) {
1816 UsbWidth = width / 2;
1817 usbvision->stretch_width = 2;
1818 }
1819 else {
1820 UsbWidth = width;
1821 usbvision->stretch_width = 1;
1822 }
1823
1824 if (height > MAX_USB_HEIGHT) {
1825 UsbHeight = height / 2;
1826 usbvision->stretch_height = 2;
1827 }
1828 else {
1829 UsbHeight = height;
1830 usbvision->stretch_height = 1;
1831 }
1832
1833 RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1834 UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1835 RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1836 UsbHeight &= ~(1);
1837
1838 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1839 UsbWidth, UsbHeight, width, height,
1840 usbvision->stretch_width, usbvision->stretch_height);
1841
1842 /* I'll not rewrite the same values */
1843 if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1844 value[0] = UsbWidth & 0xff; //LSB
1845 value[1] = (UsbWidth >> 8) & 0x03; //MSB
1846 value[2] = UsbHeight & 0xff; //LSB
1847 value[3] = (UsbHeight >> 8) & 0x03; //MSB
1848
1849 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1850 USBVISION_OP_CODE,
1851 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1852 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1853
1854 if (errCode < 0) {
1855 dev_err(&usbvision->dev->dev,
1856 "%s failed: error %d\n", __func__, errCode);
1857 return errCode;
1858 }
1859 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1860 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1861 }
1862
1863 if (usbvision->isocMode == ISOC_MODE_YUV422) {
1864 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1865 }
1866 else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1867 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1868 }
1869 else {
1870 frameRate = FRAMERATE_MAX;
1871 }
1872
1873 if (usbvision->tvnormId & V4L2_STD_625_50) {
1874 frameDrop = frameRate * 32 / 25 - 1;
1875 }
1876 else if (usbvision->tvnormId & V4L2_STD_525_60) {
1877 frameDrop = frameRate * 32 / 30 - 1;
1878 }
1879
1880 RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1881
1882 PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1883
1884 frameDrop = FRAMERATE_MAX; // We can allow the maximum here, because dropping is controlled
1885
1886 /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1887 => frameSkip = 4;
1888 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1889
1890 frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1891 => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1892 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1893 */
1894 errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1895 return errCode;
1896 }
1897
1898
1899 /*
1900 * usbvision_frames_alloc
1901 * allocate the required frames
1902 */
1903 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1904 {
1905 int i;
1906
1907 /*needs to be page aligned cause the buffers can be mapped individually! */
1908 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
1909 usbvision->curheight *
1910 usbvision->palette.bytes_per_pixel);
1911
1912 /* Try to do my best to allocate the frames the user want in the remaining memory */
1913 usbvision->num_frames = number_of_frames;
1914 while (usbvision->num_frames > 0) {
1915 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1916 if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
1917 break;
1918 }
1919 usbvision->num_frames--;
1920 }
1921
1922 spin_lock_init(&usbvision->queue_lock);
1923 init_waitqueue_head(&usbvision->wait_frame);
1924 init_waitqueue_head(&usbvision->wait_stream);
1925
1926 /* Allocate all buffers */
1927 for (i = 0; i < usbvision->num_frames; i++) {
1928 usbvision->frame[i].index = i;
1929 usbvision->frame[i].grabstate = FrameState_Unused;
1930 usbvision->frame[i].data = usbvision->fbuf +
1931 i * usbvision->max_frame_size;
1932 /*
1933 * Set default sizes for read operation.
1934 */
1935 usbvision->stretch_width = 1;
1936 usbvision->stretch_height = 1;
1937 usbvision->frame[i].width = usbvision->curwidth;
1938 usbvision->frame[i].height = usbvision->curheight;
1939 usbvision->frame[i].bytes_read = 0;
1940 }
1941 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
1942 return usbvision->num_frames;
1943 }
1944
1945 /*
1946 * usbvision_frames_free
1947 * frees memory allocated for the frames
1948 */
1949 void usbvision_frames_free(struct usb_usbvision *usbvision)
1950 {
1951 /* Have to free all that memory */
1952 PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
1953
1954 if (usbvision->fbuf != NULL) {
1955 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1956 usbvision->fbuf = NULL;
1957
1958 usbvision->num_frames = 0;
1959 }
1960 }
1961 /*
1962 * usbvision_empty_framequeues()
1963 * prepare queues for incoming and outgoing frames
1964 */
1965 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1966 {
1967 u32 i;
1968
1969 INIT_LIST_HEAD(&(usbvision->inqueue));
1970 INIT_LIST_HEAD(&(usbvision->outqueue));
1971
1972 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1973 usbvision->frame[i].grabstate = FrameState_Unused;
1974 usbvision->frame[i].bytes_read = 0;
1975 }
1976 }
1977
1978 /*
1979 * usbvision_stream_interrupt()
1980 * stops streaming
1981 */
1982 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1983 {
1984 int ret = 0;
1985
1986 /* stop reading from the device */
1987
1988 usbvision->streaming = Stream_Interrupt;
1989 ret = wait_event_timeout(usbvision->wait_stream,
1990 (usbvision->streaming == Stream_Idle),
1991 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1992 return ret;
1993 }
1994
1995 /*
1996 * usbvision_set_compress_params()
1997 *
1998 */
1999
2000 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
2001 {
2002 static const char proc[] = "usbvision_set_compresion_params: ";
2003 int rc;
2004 unsigned char value[6];
2005
2006 value[0] = 0x0F; // Intra-Compression cycle
2007 value[1] = 0x01; // Reg.45 one line per strip
2008 value[2] = 0x00; // Reg.46 Force intra mode on all new frames
2009 value[3] = 0x00; // Reg.47 FORCE_UP <- 0 normal operation (not force)
2010 value[4] = 0xA2; // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
2011 value[5] = 0x00; // Reg.49 DVI_YUV This has nothing to do with compression
2012
2013 //catched values for NT1004
2014 // value[0] = 0xFF; // Never apply intra mode automatically
2015 // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
2016 // value[2] = 0x01; // Force intra mode on all new frames
2017 // value[3] = 0x00; // Strip size 400 Bytes; do not force up
2018 // value[4] = 0xA2; //
2019 if (!USBVISION_IS_OPERATIONAL(usbvision))
2020 return 0;
2021
2022 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2023 USBVISION_OP_CODE,
2024 USB_DIR_OUT | USB_TYPE_VENDOR |
2025 USB_RECIP_ENDPOINT, 0,
2026 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
2027
2028 if (rc < 0) {
2029 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2030 "reconnect or reload driver.\n", proc, rc);
2031 return rc;
2032 }
2033
2034 if (usbvision->bridgeType == BRIDGE_NT1004) {
2035 value[0] = 20; // PCM Threshold 1
2036 value[1] = 12; // PCM Threshold 2
2037 value[2] = 255; // Distorsion Threshold inter
2038 value[3] = 255; // Distorsion Threshold intra
2039 value[4] = 43; // Max Distorsion inter
2040 value[5] = 43; // Max Distorsion intra
2041 }
2042 else {
2043 value[0] = 20; // PCM Threshold 1
2044 value[1] = 12; // PCM Threshold 2
2045 value[2] = 255; // Distorsion Threshold d7-d0
2046 value[3] = 0; // Distorsion Threshold d11-d8
2047 value[4] = 43; // Max Distorsion d7-d0
2048 value[5] = 0; // Max Distorsion d8
2049 }
2050
2051 if (!USBVISION_IS_OPERATIONAL(usbvision))
2052 return 0;
2053
2054 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2055 USBVISION_OP_CODE,
2056 USB_DIR_OUT | USB_TYPE_VENDOR |
2057 USB_RECIP_ENDPOINT, 0,
2058 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2059
2060 if (rc < 0) {
2061 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2062 "reconnect or reload driver.\n", proc, rc);
2063 return rc;
2064 }
2065
2066
2067 return rc;
2068 }
2069
2070
2071 /*
2072 * usbvision_set_input()
2073 *
2074 * Set the input (saa711x, ...) size x y and other misc input params
2075 * I've no idea if this parameters are right
2076 *
2077 */
2078 int usbvision_set_input(struct usb_usbvision *usbvision)
2079 {
2080 static const char proc[] = "usbvision_set_input: ";
2081 int rc;
2082 unsigned char value[8];
2083 unsigned char dvi_yuv_value;
2084
2085 if (!USBVISION_IS_OPERATIONAL(usbvision))
2086 return 0;
2087
2088 /* Set input format expected from decoder*/
2089 if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) {
2090 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1;
2091 } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2092 /* SAA7113 uses 8 bit output */
2093 value[0] = USBVISION_8_422_SYNC;
2094 } else {
2095 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2096 * as that is how saa7111 is configured */
2097 value[0] = USBVISION_16_422_SYNC;
2098 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2099 }
2100
2101 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2102 if (rc < 0) {
2103 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2104 "reconnect or reload driver.\n", proc, rc);
2105 return rc;
2106 }
2107
2108
2109 if (usbvision->tvnormId & V4L2_STD_PAL) {
2110 value[0] = 0xC0;
2111 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2112 value[2] = 0x20;
2113 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2114 value[4] = 0x60;
2115 value[5] = 0x00; //0x0060 -> 96 Input video h offset
2116 value[6] = 0x16;
2117 value[7] = 0x00; //0x0016 -> 22 Input video v offset
2118 } else if (usbvision->tvnormId & V4L2_STD_SECAM) {
2119 value[0] = 0xC0;
2120 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2121 value[2] = 0x20;
2122 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2123 value[4] = 0x01;
2124 value[5] = 0x00; //0x0001 -> 01 Input video h offset
2125 value[6] = 0x01;
2126 value[7] = 0x00; //0x0001 -> 01 Input video v offset
2127 } else { /* V4L2_STD_NTSC */
2128 value[0] = 0xD0;
2129 value[1] = 0x02; //0x02D0 -> 720 Input video line length
2130 value[2] = 0xF0;
2131 value[3] = 0x00; //0x00F0 -> 240 Input video number of lines
2132 value[4] = 0x50;
2133 value[5] = 0x00; //0x0050 -> 80 Input video h offset
2134 value[6] = 0x10;
2135 value[7] = 0x00; //0x0010 -> 16 Input video v offset
2136 }
2137
2138 if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2139 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2140 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2141 }
2142
2143 if (adjust_X_Offset != -1) {
2144 value[4] = adjust_X_Offset & 0xff;
2145 value[5] = (adjust_X_Offset & 0x0300) >> 8;
2146 }
2147
2148 if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2149 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2150 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2151 }
2152
2153 if (adjust_Y_Offset != -1) {
2154 value[6] = adjust_Y_Offset & 0xff;
2155 value[7] = (adjust_Y_Offset & 0x0300) >> 8;
2156 }
2157
2158 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2159 USBVISION_OP_CODE, /* USBVISION specific code */
2160 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2161 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2162 if (rc < 0) {
2163 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2164 "reconnect or reload driver.\n", proc, rc);
2165 return rc;
2166 }
2167
2168
2169 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2170
2171 if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){
2172 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv;
2173 }
2174 else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2175 /* This changes as the fine sync control changes. Further investigation necessary */
2176 dvi_yuv_value = 0x06;
2177 }
2178
2179 return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2180 }
2181
2182
2183 /*
2184 * usbvision_set_dram_settings()
2185 *
2186 * Set the buffer address needed by the usbvision dram to operate
2187 * This values has been taken with usbsnoop.
2188 *
2189 */
2190
2191 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2192 {
2193 int rc;
2194 unsigned char value[8];
2195
2196 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2197 value[0] = 0x42;
2198 value[1] = 0x71;
2199 value[2] = 0xff;
2200 value[3] = 0x00;
2201 value[4] = 0x98;
2202 value[5] = 0xe0;
2203 value[6] = 0x71;
2204 value[7] = 0xff;
2205 // UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2206 // FDL: 0x00000-0x0E099 = 57498 Words
2207 // VDW: 0x0E3FF-0x3FFFF
2208 }
2209 else {
2210 value[0] = 0x42;
2211 value[1] = 0x00;
2212 value[2] = 0xff;
2213 value[3] = 0x00;
2214 value[4] = 0x00;
2215 value[5] = 0x00;
2216 value[6] = 0x00;
2217 value[7] = 0xff;
2218 }
2219 /* These are the values of the address of the video buffer,
2220 * they have to be loaded into the USBVISION_DRM_PRM1-8
2221 *
2222 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2223 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2224 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2225 * Only used in compressed mode
2226 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2227 * Only used in compressed mode
2228 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2229 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2230 */
2231
2232 if (!USBVISION_IS_OPERATIONAL(usbvision))
2233 return 0;
2234
2235 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2236 USBVISION_OP_CODE, /* USBVISION specific code */
2237 USB_DIR_OUT | USB_TYPE_VENDOR |
2238 USB_RECIP_ENDPOINT, 0,
2239 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2240
2241 if (rc < 0) {
2242 dev_err(&usbvision->dev->dev, "%sERROR=%d\n", __func__, rc);
2243 return rc;
2244 }
2245
2246 /* Restart the video buffer logic */
2247 if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2248 USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2249 return rc;
2250 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2251
2252 return rc;
2253 }
2254
2255 /*
2256 * ()
2257 *
2258 * Power on the device, enables suspend-resume logic
2259 * & reset the isoc End-Point
2260 *
2261 */
2262
2263 int usbvision_power_on(struct usb_usbvision *usbvision)
2264 {
2265 int errCode = 0;
2266
2267 PDEBUG(DBG_FUNC, "");
2268
2269 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2270 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2271 USBVISION_SSPND_EN | USBVISION_RES2);
2272
2273 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2274 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2275 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2276 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2277 if (errCode == 1) {
2278 usbvision->power = 1;
2279 }
2280 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2281 return errCode;
2282 }
2283
2284
2285 /*
2286 * usbvision timer stuff
2287 */
2288
2289 // to call usbvision_power_off from task queue
2290 static void call_usbvision_power_off(struct work_struct *work)
2291 {
2292 struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2293
2294 PDEBUG(DBG_FUNC, "");
2295 if(mutex_lock_interruptible(&usbvision->lock)) {
2296 return;
2297 }
2298
2299
2300 if(usbvision->user == 0) {
2301 usbvision_i2c_unregister(usbvision);
2302
2303 usbvision_power_off(usbvision);
2304 usbvision->initialized = 0;
2305 }
2306 mutex_unlock(&usbvision->lock);
2307 }
2308
2309 static void usbvision_powerOffTimer(unsigned long data)
2310 {
2311 struct usb_usbvision *usbvision = (void *) data;
2312
2313 PDEBUG(DBG_FUNC, "");
2314 del_timer(&usbvision->powerOffTimer);
2315 INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2316 (void) schedule_work(&usbvision->powerOffWork);
2317 }
2318
2319 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2320 {
2321 init_timer(&usbvision->powerOffTimer);
2322 usbvision->powerOffTimer.data = (long) usbvision;
2323 usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2324 }
2325
2326 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2327 {
2328 mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2329 }
2330
2331 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2332 {
2333 if (timer_pending(&usbvision->powerOffTimer)) {
2334 del_timer(&usbvision->powerOffTimer);
2335 }
2336 }
2337
2338 /*
2339 * usbvision_begin_streaming()
2340 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2341 * idea about the rest
2342 */
2343 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2344 {
2345 int errCode = 0;
2346
2347 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2348 usbvision_init_compression(usbvision);
2349 }
2350 errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2351 usbvision->Vin_Reg2_Preset);
2352 return errCode;
2353 }
2354
2355 /*
2356 * usbvision_restart_isoc()
2357 * Not sure yet if touching here PWR_REG make loose the config
2358 */
2359
2360 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2361 {
2362 int ret;
2363
2364 if (
2365 (ret =
2366 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2367 USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2368 return ret;
2369 if (
2370 (ret =
2371 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2372 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2373 USBVISION_RES2)) < 0)
2374 return ret;
2375 if (
2376 (ret =
2377 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2378 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2379 usbvision->Vin_Reg2_Preset)) < 0) return ret;
2380
2381 /* TODO: schedule timeout */
2382 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2383
2384 return 0;
2385 }
2386
2387 int usbvision_audio_off(struct usb_usbvision *usbvision)
2388 {
2389 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2390 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2391 return -1;
2392 }
2393 usbvision->AudioMute = 0;
2394 usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2395 return 0;
2396 }
2397
2398 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2399 {
2400 if (!usbvision->AudioMute) {
2401 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2402 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2403 return -1;
2404 }
2405 }
2406 usbvision->AudioChannel = AudioChannel;
2407 return 0;
2408 }
2409
2410 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2411 {
2412 usbvision_set_video_format(usbvision, format);
2413 usbvision_set_dram_settings(usbvision);
2414 usbvision_set_compress_params(usbvision);
2415 usbvision_set_input(usbvision);
2416 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2417 usbvision_restart_isoc(usbvision);
2418
2419 /* cosas del PCM */
2420 return USBVISION_IS_OPERATIONAL(usbvision);
2421 }
2422
2423 int usbvision_set_alternate(struct usb_usbvision *dev)
2424 {
2425 int errCode, prev_alt = dev->ifaceAlt;
2426 int i;
2427
2428 dev->ifaceAlt=0;
2429 for(i=0;i< dev->num_alt; i++)
2430 if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt])
2431 dev->ifaceAlt=i;
2432
2433 if (dev->ifaceAlt != prev_alt) {
2434 dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt];
2435 PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize);
2436 errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt);
2437 if (errCode < 0) {
2438 dev_err(&dev->dev->dev,
2439 "cannot change alternate number to %d (error=%i)\n",
2440 dev->ifaceAlt, errCode);
2441 return errCode;
2442 }
2443 }
2444
2445 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize);
2446
2447 return 0;
2448 }
2449
2450 /*
2451 * usbvision_init_isoc()
2452 *
2453 */
2454 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2455 {
2456 struct usb_device *dev = usbvision->dev;
2457 int bufIdx, errCode, regValue;
2458 int sb_size;
2459
2460 if (!USBVISION_IS_OPERATIONAL(usbvision))
2461 return -EFAULT;
2462
2463 usbvision->curFrame = NULL;
2464 scratch_reset(usbvision);
2465
2466 /* Alternate interface 1 is is the biggest frame size */
2467 errCode = usbvision_set_alternate(usbvision);
2468 if (errCode < 0) {
2469 usbvision->last_error = errCode;
2470 return -EBUSY;
2471 }
2472 sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2473
2474 regValue = (16 - usbvision_read_reg(usbvision,
2475 USBVISION_ALTER_REG)) & 0x0F;
2476
2477 usbvision->usb_bandwidth = regValue >> 1;
2478 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2479 usbvision->usb_bandwidth);
2480
2481
2482
2483 /* We double buffer the Iso lists */
2484
2485 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2486 int j, k;
2487 struct urb *urb;
2488
2489 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2490 if (urb == NULL) {
2491 dev_err(&usbvision->dev->dev,
2492 "%s: usb_alloc_urb() failed\n", __func__);
2493 return -ENOMEM;
2494 }
2495 usbvision->sbuf[bufIdx].urb = urb;
2496 usbvision->sbuf[bufIdx].data =
2497 usb_buffer_alloc(usbvision->dev,
2498 sb_size,
2499 GFP_KERNEL,
2500 &urb->transfer_dma);
2501 urb->dev = dev;
2502 urb->context = usbvision;
2503 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2504 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
2505 urb->interval = 1;
2506 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2507 urb->complete = usbvision_isocIrq;
2508 urb->number_of_packets = USBVISION_URB_FRAMES;
2509 urb->transfer_buffer_length =
2510 usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2511 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2512 k += usbvision->isocPacketSize) {
2513 urb->iso_frame_desc[j].offset = k;
2514 urb->iso_frame_desc[j].length =
2515 usbvision->isocPacketSize;
2516 }
2517 }
2518
2519 /* Submit all URBs */
2520 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2521 errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb,
2522 GFP_KERNEL);
2523 if (errCode) {
2524 dev_err(&usbvision->dev->dev,
2525 "%s: usb_submit_urb(%d) failed: error %d\n",
2526 __func__, bufIdx, errCode);
2527 }
2528 }
2529
2530 usbvision->streaming = Stream_Idle;
2531 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2532 __func__,
2533 usbvision->video_endp);
2534 return 0;
2535 }
2536
2537 /*
2538 * usbvision_stop_isoc()
2539 *
2540 * This procedure stops streaming and deallocates URBs. Then it
2541 * activates zero-bandwidth alt. setting of the video interface.
2542 *
2543 */
2544 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2545 {
2546 int bufIdx, errCode, regValue;
2547 int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2548
2549 if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2550 return;
2551
2552 /* Unschedule all of the iso td's */
2553 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2554 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2555 if (usbvision->sbuf[bufIdx].data){
2556 usb_buffer_free(usbvision->dev,
2557 sb_size,
2558 usbvision->sbuf[bufIdx].data,
2559 usbvision->sbuf[bufIdx].urb->transfer_dma);
2560 }
2561 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2562 usbvision->sbuf[bufIdx].urb = NULL;
2563 }
2564
2565 PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __func__);
2566 usbvision->streaming = Stream_Off;
2567
2568 if (!usbvision->remove_pending) {
2569
2570 /* Set packet size to 0 */
2571 usbvision->ifaceAlt=0;
2572 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2573 usbvision->ifaceAlt);
2574 if (errCode < 0) {
2575 dev_err(&usbvision->dev->dev,
2576 "%s: usb_set_interface() failed: error %d\n",
2577 __func__, errCode);
2578 usbvision->last_error = errCode;
2579 }
2580 regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2581 usbvision->isocPacketSize =
2582 (regValue == 0) ? 0 : (regValue * 64) - 1;
2583 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2584 usbvision->isocPacketSize);
2585
2586 usbvision->usb_bandwidth = regValue >> 1;
2587 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2588 usbvision->usb_bandwidth);
2589 }
2590 }
2591
2592 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2593 {
2594 /* inputs #0 and #3 are constant for every SAA711x. */
2595 /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2596 int mode[4]= {SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3};
2597 int audio[]= {1, 0, 0, 0};
2598 //channel 0 is TV with audiochannel 1 (tuner mono)
2599 //channel 1 is Composite with audio channel 0 (line in)
2600 //channel 2 is S-Video with audio channel 0 (line in)
2601 //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2602
2603 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2604 usbvision->ctl_input = channel;
2605
2606 // set the new channel
2607 // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2608 // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2609
2610 switch (usbvision_device_data[usbvision->DevModel].Codec) {
2611 case CODEC_SAA7113:
2612 mode[1] = SAA7115_COMPOSITE2;
2613 if (SwitchSVideoInput) {
2614 /* To handle problems with S-Video Input for
2615 * some devices. Use SwitchSVideoInput
2616 * parameter when loading the module.*/
2617 mode[2] = SAA7115_COMPOSITE1;
2618 }
2619 else {
2620 mode[2] = SAA7115_SVIDEO1;
2621 }
2622 break;
2623 case CODEC_SAA7111:
2624 default:
2625 /* modes for saa7111 */
2626 mode[1] = SAA7115_COMPOSITE1;
2627 mode[2] = SAA7115_SVIDEO1;
2628 break;
2629 }
2630 call_all(usbvision, video, s_routing, mode[channel], 0, 0);
2631 usbvision_set_audio(usbvision, audio[channel]);
2632 return 0;
2633 }
2634
2635 /*
2636 * Overrides for Emacs so that we follow Linus's tabbing style.
2637 * ---------------------------------------------------------------------------
2638 * Local variables:
2639 * c-basic-offset: 8
2640 * End:
2641 */
Linux kernel - Deliverables
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