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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / media / video / usbvision / usbvision-core.c
blobe0f91e4ab653ccb975676a908e6f2b11db5eedd0
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/highmem.h>
32 #include <linux/vmalloc.h>
33 #include <linux/module.h>
34 #include <linux/init.h>
35 #include <linux/spinlock.h>
36 #include <asm/io.h>
37 #include <linux/videodev2.h>
38 #include <linux/i2c.h>
39
40 #include <media/saa7115.h>
41 #include <media/v4l2-common.h>
42 #include <media/tuner.h>
43
44 #include <linux/workqueue.h>
45
46 #include "usbvision.h"
47
48 static unsigned int core_debug;
49 module_param(core_debug,int,0644);
50 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
51
52 static unsigned int force_testpattern;
53 module_param(force_testpattern,int,0644);
54 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
55
56 static int adjustCompression = 1; /* Set the compression to be adaptive */
57 module_param(adjustCompression, int, 0444);
58 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device. Default: 1 (On)");
59
60 /* To help people with Black and White output with using s-video input.
61 * Some cables and input device are wired differently. */
62 static int SwitchSVideoInput;
63 module_param(SwitchSVideoInput, int, 0444);
64 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)");
65
66 static unsigned int adjust_X_Offset = -1;
67 module_param(adjust_X_Offset, int, 0644);
68 MODULE_PARM_DESC(adjust_X_Offset, "adjust X offset display [core]");
69
70 static unsigned int adjust_Y_Offset = -1;
71 module_param(adjust_Y_Offset, int, 0644);
72 MODULE_PARM_DESC(adjust_Y_Offset, "adjust Y offset display [core]");
73
74
75 #define ENABLE_HEXDUMP 0 /* Enable if you need it */
76
77
78 #ifdef USBVISION_DEBUG
79 #define PDEBUG(level, fmt, args...) { \
80 if (core_debug & (level)) \
81 printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
82 __func__, __LINE__ , ## args); \
83 }
84 #else
85 #define PDEBUG(level, fmt, args...) do {} while(0)
86 #endif
87
88 #define DBG_HEADER 1<<0
89 #define DBG_IRQ 1<<1
90 #define DBG_ISOC 1<<2
91 #define DBG_PARSE 1<<3
92 #define DBG_SCRATCH 1<<4
93 #define DBG_FUNC 1<<5
94
95 static const int max_imgwidth = MAX_FRAME_WIDTH;
96 static const int max_imgheight = MAX_FRAME_HEIGHT;
97 static const int min_imgwidth = MIN_FRAME_WIDTH;
98 static const int min_imgheight = MIN_FRAME_HEIGHT;
99
100 /* The value of 'scratch_buf_size' affects quality of the picture
101 * in many ways. Shorter buffers may cause loss of data when client
102 * is too slow. Larger buffers are memory-consuming and take longer
103 * to work with. This setting can be adjusted, but the default value
104 * should be OK for most desktop users.
105 */
106 #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) // 128kB memory scratch buffer
107 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
108
109 // Function prototypes
110 static int usbvision_request_intra (struct usb_usbvision *usbvision);
111 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
112 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
113 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
114
115 /*******************************/
116 /* Memory management functions */
117 /*******************************/
118
119 /*
120 * Here we want the physical address of the memory.
121 * This is used when initializing the contents of the area.
122 */
123
124 static void *usbvision_rvmalloc(unsigned long size)
125 {
126 void *mem;
127 unsigned long adr;
128
129 size = PAGE_ALIGN(size);
130 mem = vmalloc_32(size);
131 if (!mem)
132 return NULL;
133
134 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
135 adr = (unsigned long) mem;
136 while (size > 0) {
137 SetPageReserved(vmalloc_to_page((void *)adr));
138 adr += PAGE_SIZE;
139 size -= PAGE_SIZE;
140 }
141
142 return mem;
143 }
144
145 static void usbvision_rvfree(void *mem, unsigned long size)
146 {
147 unsigned long adr;
148
149 if (!mem)
150 return;
151
152 size = PAGE_ALIGN(size);
153
154 adr = (unsigned long) mem;
155 while ((long) size > 0) {
156 ClearPageReserved(vmalloc_to_page((void *)adr));
157 adr += PAGE_SIZE;
158 size -= PAGE_SIZE;
159 }
160
161 vfree(mem);
162 }
163
164
165 #if ENABLE_HEXDUMP
166 static void usbvision_hexdump(const unsigned char *data, int len)
167 {
168 char tmp[80];
169 int i, k;
170
171 for (i = k = 0; len > 0; i++, len--) {
172 if (i > 0 && (i % 16 == 0)) {
173 printk("%s\n", tmp);
174 k = 0;
175 }
176 k += sprintf(&tmp[k], "%02x ", data[i]);
177 }
178 if (k > 0)
179 printk("%s\n", tmp);
180 }
181 #endif
182
183 /********************************
184 * scratch ring buffer handling
185 ********************************/
186 static int scratch_len(struct usb_usbvision *usbvision) /*This returns the amount of data actually in the buffer */
187 {
188 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
189 if (len < 0) {
190 len += scratch_buf_size;
191 }
192 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
193
194 return len;
195 }
196
197
198 /* This returns the free space left in the buffer */
199 static int scratch_free(struct usb_usbvision *usbvision)
200 {
201 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
202 if (free <= 0) {
203 free += scratch_buf_size;
204 }
205 if (free) {
206 free -= 1; /* at least one byte in the buffer must */
207 /* left blank, otherwise there is no chance to differ between full and empty */
208 }
209 PDEBUG(DBG_SCRATCH, "return %d\n", free);
210
211 return free;
212 }
213
214
215 /* This puts data into the buffer */
216 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
217 int len)
218 {
219 int len_part;
220
221 if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
222 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
223 usbvision->scratch_write_ptr += len;
224 }
225 else {
226 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
227 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
228 if (len == len_part) {
229 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */
230 }
231 else {
232 memcpy(usbvision->scratch, data + len_part, len - len_part);
233 usbvision->scratch_write_ptr = len - len_part;
234 }
235 }
236
237 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
238
239 return len;
240 }
241
242 /* This marks the write_ptr as position of new frame header */
243 static void scratch_mark_header(struct usb_usbvision *usbvision)
244 {
245 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
246
247 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
248 usbvision->scratch_write_ptr;
249 usbvision->scratch_headermarker_write_ptr += 1;
250 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
251 }
252
253 /* This gets data from the buffer at the given "ptr" position */
254 static int scratch_get_extra(struct usb_usbvision *usbvision,
255 unsigned char *data, int *ptr, int len)
256 {
257 int len_part;
258 if (*ptr + len < scratch_buf_size) {
259 memcpy(data, usbvision->scratch + *ptr, len);
260 *ptr += len;
261 }
262 else {
263 len_part = scratch_buf_size - *ptr;
264 memcpy(data, usbvision->scratch + *ptr, len_part);
265 if (len == len_part) {
266 *ptr = 0; /* just set the y_ptr to zero */
267 }
268 else {
269 memcpy(data + len_part, usbvision->scratch, len - len_part);
270 *ptr = len - len_part;
271 }
272 }
273
274 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
275
276 return len;
277 }
278
279
280 /* This sets the scratch extra read pointer */
281 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
282 int len)
283 {
284 *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
285
286 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
287 }
288
289
290 /*This increments the scratch extra read pointer */
291 static void scratch_inc_extra_ptr(int *ptr, int len)
292 {
293 *ptr = (*ptr + len) % scratch_buf_size;
294
295 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
296 }
297
298
299 /* This gets data from the buffer */
300 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
301 int len)
302 {
303 int len_part;
304 if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
305 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
306 usbvision->scratch_read_ptr += len;
307 }
308 else {
309 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
310 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
311 if (len == len_part) {
312 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */
313 }
314 else {
315 memcpy(data + len_part, usbvision->scratch, len - len_part);
316 usbvision->scratch_read_ptr = len - len_part;
317 }
318 }
319
320 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
321
322 return len;
323 }
324
325
326 /* This sets read pointer to next header and returns it */
327 static int scratch_get_header(struct usb_usbvision *usbvision,
328 struct usbvision_frame_header *header)
329 {
330 int errCode = 0;
331
332 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
333
334 while (usbvision->scratch_headermarker_write_ptr -
335 usbvision->scratch_headermarker_read_ptr != 0) {
336 usbvision->scratch_read_ptr =
337 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
338 usbvision->scratch_headermarker_read_ptr += 1;
339 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
340 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
341 if ((header->magic_1 == USBVISION_MAGIC_1)
342 && (header->magic_2 == USBVISION_MAGIC_2)
343 && (header->headerLength == USBVISION_HEADER_LENGTH)) {
344 errCode = USBVISION_HEADER_LENGTH;
345 header->frameWidth = header->frameWidthLo + (header->frameWidthHi << 8);
346 header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
347 break;
348 }
349 }
350
351 return errCode;
352 }
353
354
355 /*This removes len bytes of old data from the buffer */
356 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
357 {
358
359 usbvision->scratch_read_ptr += len;
360 usbvision->scratch_read_ptr %= scratch_buf_size;
361 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
362 }
363
364
365 /*This resets the buffer - kills all data in it too */
366 static void scratch_reset(struct usb_usbvision *usbvision)
367 {
368 PDEBUG(DBG_SCRATCH, "\n");
369
370 usbvision->scratch_read_ptr = 0;
371 usbvision->scratch_write_ptr = 0;
372 usbvision->scratch_headermarker_read_ptr = 0;
373 usbvision->scratch_headermarker_write_ptr = 0;
374 usbvision->isocstate = IsocState_NoFrame;
375 }
376
377 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
378 {
379 usbvision->scratch = vmalloc_32(scratch_buf_size);
380 scratch_reset(usbvision);
381 if(usbvision->scratch == NULL) {
382 dev_err(&usbvision->dev->dev,
383 "%s: unable to allocate %d bytes for scratch\n",
384 __func__, scratch_buf_size);
385 return -ENOMEM;
386 }
387 return 0;
388 }
389
390 void usbvision_scratch_free(struct usb_usbvision *usbvision)
391 {
392 vfree(usbvision->scratch);
393 usbvision->scratch = NULL;
394
395 }
396
397 /*
398 * usbvision_testpattern()
399 *
400 * Procedure forms a test pattern (yellow grid on blue background).
401 *
402 * Parameters:
403 * fullframe: if TRUE then entire frame is filled, otherwise the procedure
404 * continues from the current scanline.
405 * pmode 0: fill the frame with solid blue color (like on VCR or TV)
406 * 1: Draw a colored grid
407 *
408 */
409 static void usbvision_testpattern(struct usb_usbvision *usbvision,
410 int fullframe, int pmode)
411 {
412 static const char proc[] = "usbvision_testpattern";
413 struct usbvision_frame *frame;
414 unsigned char *f;
415 int num_cell = 0;
416 int scan_length = 0;
417 static int num_pass;
418
419 if (usbvision == NULL) {
420 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
421 return;
422 }
423 if (usbvision->curFrame == NULL) {
424 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
425 return;
426 }
427
428 /* Grab the current frame */
429 frame = usbvision->curFrame;
430
431 /* Optionally start at the beginning */
432 if (fullframe) {
433 frame->curline = 0;
434 frame->scanlength = 0;
435 }
436
437 /* Form every scan line */
438 for (; frame->curline < frame->frmheight; frame->curline++) {
439 int i;
440
441 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
442 for (i = 0; i < usbvision->curwidth; i++) {
443 unsigned char cb = 0x80;
444 unsigned char cg = 0;
445 unsigned char cr = 0;
446
447 if (pmode == 1) {
448 if (frame->curline % 32 == 0)
449 cb = 0, cg = cr = 0xFF;
450 else if (i % 32 == 0) {
451 if (frame->curline % 32 == 1)
452 num_cell++;
453 cb = 0, cg = cr = 0xFF;
454 } else {
455 cb =
456 ((num_cell * 7) +
457 num_pass) & 0xFF;
458 cg =
459 ((num_cell * 5) +
460 num_pass * 2) & 0xFF;
461 cr =
462 ((num_cell * 3) +
463 num_pass * 3) & 0xFF;
464 }
465 } else {
466 /* Just the blue screen */
467 }
468
469 *f++ = cb;
470 *f++ = cg;
471 *f++ = cr;
472 scan_length += 3;
473 }
474 }
475
476 frame->grabstate = FrameState_Done;
477 frame->scanlength += scan_length;
478 ++num_pass;
479
480 }
481
482 /*
483 * usbvision_decompress_alloc()
484 *
485 * allocates intermediate buffer for decompression
486 */
487 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
488 {
489 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
490 usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
491 if (usbvision->IntraFrameBuffer == NULL) {
492 dev_err(&usbvision->dev->dev,
493 "%s: unable to allocate %d for compr. frame buffer\n",
494 __func__, IFB_size);
495 return -ENOMEM;
496 }
497 return 0;
498 }
499
500 /*
501 * usbvision_decompress_free()
502 *
503 * frees intermediate buffer for decompression
504 */
505 void usbvision_decompress_free(struct usb_usbvision *usbvision)
506 {
507 vfree(usbvision->IntraFrameBuffer);
508 usbvision->IntraFrameBuffer = NULL;
509
510 }
511
512 /************************************************************
513 * Here comes the data parsing stuff that is run as interrupt
514 ************************************************************/
515 /*
516 * usbvision_find_header()
517 *
518 * Locate one of supported header markers in the scratch buffer.
519 */
520 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
521 {
522 struct usbvision_frame *frame;
523 int foundHeader = 0;
524
525 frame = usbvision->curFrame;
526
527 while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
528 // found header in scratch
529 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
530 frame->isocHeader.magic_2,
531 frame->isocHeader.magic_1,
532 frame->isocHeader.headerLength,
533 frame->isocHeader.frameNum,
534 frame->isocHeader.framePhase,
535 frame->isocHeader.frameLatency,
536 frame->isocHeader.dataFormat,
537 frame->isocHeader.formatParam,
538 frame->isocHeader.frameWidth,
539 frame->isocHeader.frameHeight);
540
541 if (usbvision->requestIntra) {
542 if (frame->isocHeader.formatParam & 0x80) {
543 foundHeader = 1;
544 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
545 usbvision_unrequest_intra(usbvision);
546 break;
547 }
548 }
549 else {
550 foundHeader = 1;
551 break;
552 }
553 }
554
555 if (foundHeader) {
556 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
557 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
558 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
559 }
560 else { // no header found
561 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
562 scratch_reset(usbvision);
563 return ParseState_EndParse;
564 }
565
566 // found header
567 if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
568 //check isocHeader.frameNum for lost frames
569 if (usbvision->lastIsocFrameNum >= 0) {
570 if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
571 // unexpected frame drop: need to request new intra frame
572 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
573 usbvision_request_intra(usbvision);
574 return ParseState_NextFrame;
575 }
576 }
577 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
578 }
579 usbvision->header_count++;
580 frame->scanstate = ScanState_Lines;
581 frame->curline = 0;
582
583 if (force_testpattern) {
584 usbvision_testpattern(usbvision, 1, 1);
585 return ParseState_NextFrame;
586 }
587 return ParseState_Continue;
588 }
589
590 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
591 long *pcopylen)
592 {
593 volatile struct usbvision_frame *frame;
594 unsigned char *f;
595 int len;
596 int i;
597 unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
598 unsigned char rv, gv, bv; // RGB components
599 int clipmask_index, bytes_per_pixel;
600 int stretch_bytes, clipmask_add;
601
602 frame = usbvision->curFrame;
603 f = frame->data + (frame->v4l2_linesize * frame->curline);
604
605 /* Make sure there's enough data for the entire line */
606 len = (frame->isocHeader.frameWidth * 2)+5;
607 if (scratch_len(usbvision) < len) {
608 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
609 return ParseState_Out;
610 }
611
612 if ((frame->curline + 1) >= frame->frmheight) {
613 return ParseState_NextFrame;
614 }
615
616 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
617 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
618 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
619 clipmask_add = usbvision->stretch_width;
620
621 for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
622
623 scratch_get(usbvision, &yuyv[0], 4);
624
625 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
626 *f++ = yuyv[0]; // Y
627 *f++ = yuyv[3]; // U
628 }
629 else {
630
631 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
632 switch (frame->v4l2_format.format) {
633 case V4L2_PIX_FMT_RGB565:
634 *f++ = (0x1F & rv) |
635 (0xE0 & (gv << 5));
636 *f++ = (0x07 & (gv >> 3)) |
637 (0xF8 & bv);
638 break;
639 case V4L2_PIX_FMT_RGB24:
640 *f++ = rv;
641 *f++ = gv;
642 *f++ = bv;
643 break;
644 case V4L2_PIX_FMT_RGB32:
645 *f++ = rv;
646 *f++ = gv;
647 *f++ = bv;
648 f++;
649 break;
650 case V4L2_PIX_FMT_RGB555:
651 *f++ = (0x1F & rv) |
652 (0xE0 & (gv << 5));
653 *f++ = (0x03 & (gv >> 3)) |
654 (0x7C & (bv << 2));
655 break;
656 }
657 }
658 clipmask_index += clipmask_add;
659 f += stretch_bytes;
660
661 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
662 *f++ = yuyv[2]; // Y
663 *f++ = yuyv[1]; // V
664 }
665 else {
666
667 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
668 switch (frame->v4l2_format.format) {
669 case V4L2_PIX_FMT_RGB565:
670 *f++ = (0x1F & rv) |
671 (0xE0 & (gv << 5));
672 *f++ = (0x07 & (gv >> 3)) |
673 (0xF8 & bv);
674 break;
675 case V4L2_PIX_FMT_RGB24:
676 *f++ = rv;
677 *f++ = gv;
678 *f++ = bv;
679 break;
680 case V4L2_PIX_FMT_RGB32:
681 *f++ = rv;
682 *f++ = gv;
683 *f++ = bv;
684 f++;
685 break;
686 case V4L2_PIX_FMT_RGB555:
687 *f++ = (0x1F & rv) |
688 (0xE0 & (gv << 5));
689 *f++ = (0x03 & (gv >> 3)) |
690 (0x7C & (bv << 2));
691 break;
692 }
693 }
694 clipmask_index += clipmask_add;
695 f += stretch_bytes;
696 }
697
698 frame->curline += usbvision->stretch_height;
699 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
700
701 if (frame->curline >= frame->frmheight) {
702 return ParseState_NextFrame;
703 }
704 else {
705 return ParseState_Continue;
706 }
707 }
708
709 /* The decompression routine */
710 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
711 unsigned char *Decompressed, int *StartPos,
712 int *BlockTypeStartPos, int Len)
713 {
714 int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
715 unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
716
717 Integrator = 0;
718 Pos = *StartPos;
719 BlockTypePos = *BlockTypeStartPos;
720 MaxPos = 396; //Pos + Len;
721 ExtraPos = Pos;
722 BlockLen = 0;
723 BlockByte = 0;
724 BlockCode = 0;
725 BlockType = 0;
726 BlockTypeByte = 0;
727 BlockTypeLen = 0;
728 RestPixel = Len;
729
730 for (Idx = 0; Idx < Len; Idx++) {
731
732 if (BlockLen == 0) {
733 if (BlockTypeLen==0) {
734 BlockTypeByte = Compressed[BlockTypePos];
735 BlockTypePos++;
736 BlockTypeLen = 4;
737 }
738 BlockType = (BlockTypeByte & 0xC0) >> 6;
739
740 //statistic:
741 usbvision->ComprBlockTypes[BlockType]++;
742
743 Pos = ExtraPos;
744 if (BlockType == 0) {
745 if(RestPixel >= 24) {
746 Idx += 23;
747 RestPixel -= 24;
748 Integrator = Decompressed[Idx];
749 } else {
750 Idx += RestPixel - 1;
751 RestPixel = 0;
752 }
753 } else {
754 BlockCode = Compressed[Pos];
755 Pos++;
756 if (RestPixel >= 24) {
757 BlockLen = 24;
758 } else {
759 BlockLen = RestPixel;
760 }
761 RestPixel -= BlockLen;
762 ExtraPos = Pos + (BlockLen / 4);
763 }
764 BlockTypeByte <<= 2;
765 BlockTypeLen -= 1;
766 }
767 if (BlockLen > 0) {
768 if ((BlockLen%4) == 0) {
769 BlockByte = Compressed[Pos];
770 Pos++;
771 }
772 if (BlockType == 1) { //inter Block
773 Integrator = Decompressed[Idx];
774 }
775 switch (BlockByte & 0xC0) {
776 case 0x03<<6:
777 Integrator += Compressed[ExtraPos];
778 ExtraPos++;
779 break;
780 case 0x02<<6:
781 Integrator += BlockCode;
782 break;
783 case 0x00:
784 Integrator -= BlockCode;
785 break;
786 }
787 Decompressed[Idx] = Integrator;
788 BlockByte <<= 2;
789 BlockLen -= 1;
790 }
791 }
792 *StartPos = ExtraPos;
793 *BlockTypeStartPos = BlockTypePos;
794 return Idx;
795 }
796
797
798 /*
799 * usbvision_parse_compress()
800 *
801 * Parse compressed frame from the scratch buffer, put
802 * decoded RGB value into the current frame buffer and add the written
803 * number of bytes (RGB) to the *pcopylen.
804 *
805 */
806 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
807 long *pcopylen)
808 {
809 #define USBVISION_STRIP_MAGIC 0x5A
810 #define USBVISION_STRIP_LEN_MAX 400
811 #define USBVISION_STRIP_HEADER_LEN 3
812
813 struct usbvision_frame *frame;
814 unsigned char *f,*u = NULL ,*v = NULL;
815 unsigned char StripData[USBVISION_STRIP_LEN_MAX];
816 unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
817 int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
818 int clipmask_index, bytes_per_pixel, rc;
819 int imageSize;
820 unsigned char rv, gv, bv;
821 static unsigned char *Y, *U, *V;
822
823 frame = usbvision->curFrame;
824 imageSize = frame->frmwidth * frame->frmheight;
825 if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
826 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) { // this is a planar format
827 //... v4l2_linesize not used here.
828 f = frame->data + (frame->width * frame->curline);
829 } else
830 f = frame->data + (frame->v4l2_linesize * frame->curline);
831
832 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
833 // get base of u and b planes add halfoffset
834
835 u = frame->data
836 + imageSize
837 + (frame->frmwidth >>1) * frame->curline ;
838 v = u + (imageSize >>1 );
839
840 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
841
842 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
843 u = v + (imageSize >>2) ;
844 }
845
846 if (frame->curline == 0) {
847 usbvision_adjust_compression(usbvision);
848 }
849
850 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
851 return ParseState_Out;
852 }
853
854 //get strip header without changing the scratch_read_ptr
855 scratch_set_extra_ptr(usbvision, &StripPtr, 0);
856 scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
857 USBVISION_STRIP_HEADER_LEN);
858
859 if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
860 // wrong strip magic
861 usbvision->stripMagicErrors++;
862 return ParseState_NextFrame;
863 }
864
865 if (frame->curline != (int)StripHeader[2]) {
866 //line number missmatch error
867 usbvision->stripLineNumberErrors++;
868 }
869
870 StripLen = 2 * (unsigned int)StripHeader[1];
871 if (StripLen > USBVISION_STRIP_LEN_MAX) {
872 // strip overrun
873 // I think this never happens
874 usbvision_request_intra(usbvision);
875 }
876
877 if (scratch_len(usbvision) < StripLen) {
878 //there is not enough data for the strip
879 return ParseState_Out;
880 }
881
882 if (usbvision->IntraFrameBuffer) {
883 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
884 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
885 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
886 }
887 else {
888 return ParseState_NextFrame;
889 }
890
891 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
892 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
893
894 scratch_get(usbvision, StripData, StripLen);
895
896 IdxEnd = frame->frmwidth;
897 BlockTypePos = USBVISION_STRIP_HEADER_LEN;
898 StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
899 BlockPos = StartBlockPos;
900
901 usbvision->BlockPos = BlockPos;
902
903 if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
904 //return ParseState_Continue;
905 }
906 if (StripLen > usbvision->maxStripLen) {
907 usbvision->maxStripLen = StripLen;
908 }
909
910 if (frame->curline%2) {
911 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
912 //return ParseState_Continue;
913 }
914 }
915 else {
916 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
917 //return ParseState_Continue;
918 }
919 }
920
921 if (BlockPos > usbvision->comprBlockPos) {
922 usbvision->comprBlockPos = BlockPos;
923 }
924 if (BlockPos > StripLen) {
925 usbvision->stripLenErrors++;
926 }
927
928 for (Idx = 0; Idx < IdxEnd; Idx++) {
929 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
930 *f++ = Y[Idx];
931 *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
932 }
933 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
934 *f++ = Y[Idx];
935 if ( Idx & 0x01)
936 *u++ = U[Idx>>1] ;
937 else
938 *v++ = V[Idx>>1];
939 }
940 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
941 *f++ = Y [Idx];
942 if ( !(( Idx & 0x01 ) | ( frame->curline & 0x01 )) ){
943
944 /* only need do this for 1 in 4 pixels */
945 /* intraframe buffer is YUV420 format */
946
947 *u++ = U[Idx >>1];
948 *v++ = V[Idx >>1];
949 }
950
951 }
952 else {
953 YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
954 switch (frame->v4l2_format.format) {
955 case V4L2_PIX_FMT_GREY:
956 *f++ = Y[Idx];
957 break;
958 case V4L2_PIX_FMT_RGB555:
959 *f++ = (0x1F & rv) |
960 (0xE0 & (gv << 5));
961 *f++ = (0x03 & (gv >> 3)) |
962 (0x7C & (bv << 2));
963 break;
964 case V4L2_PIX_FMT_RGB565:
965 *f++ = (0x1F & rv) |
966 (0xE0 & (gv << 5));
967 *f++ = (0x07 & (gv >> 3)) |
968 (0xF8 & bv);
969 break;
970 case V4L2_PIX_FMT_RGB24:
971 *f++ = rv;
972 *f++ = gv;
973 *f++ = bv;
974 break;
975 case V4L2_PIX_FMT_RGB32:
976 *f++ = rv;
977 *f++ = gv;
978 *f++ = bv;
979 f++;
980 break;
981 }
982 }
983 clipmask_index++;
984 }
985 /* Deal with non-integer no. of bytes for YUV420P */
986 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
987 *pcopylen += frame->v4l2_linesize;
988 else
989 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
990
991 frame->curline += 1;
992
993 if (frame->curline >= frame->frmheight) {
994 return ParseState_NextFrame;
995 }
996 else {
997 return ParseState_Continue;
998 }
999
1000 }
1001
1002
1003 /*
1004 * usbvision_parse_lines_420()
1005 *
1006 * Parse two lines from the scratch buffer, put
1007 * decoded RGB value into the current frame buffer and add the written
1008 * number of bytes (RGB) to the *pcopylen.
1009 *
1010 */
1011 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
1012 long *pcopylen)
1013 {
1014 struct usbvision_frame *frame;
1015 unsigned char *f_even = NULL, *f_odd = NULL;
1016 unsigned int pixel_per_line, block;
1017 int pixel, block_split;
1018 int y_ptr, u_ptr, v_ptr, y_odd_offset;
1019 const int y_block_size = 128;
1020 const int uv_block_size = 64;
1021 const int sub_block_size = 32;
1022 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
1023 const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1024 unsigned char y[2], u, v; /* YUV components */
1025 int y_, u_, v_, vb, uvg, ur;
1026 int r_, g_, b_; /* RGB components */
1027 unsigned char g;
1028 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1029 int clipmask_add, stretch_bytes;
1030
1031 frame = usbvision->curFrame;
1032 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1033 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1034
1035 /* Make sure there's enough data for the entire line */
1036 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1037 /* I need two lines to decode the color */
1038 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1039 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1040 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1041 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
1042 clipmask_add = usbvision->stretch_width;
1043 pixel_per_line = frame->isocHeader.frameWidth;
1044
1045 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1046 //printk(KERN_DEBUG "out of data, need %d\n", len);
1047 return ParseState_Out;
1048 }
1049
1050 if ((frame->curline + 1) >= frame->frmheight) {
1051 return ParseState_NextFrame;
1052 }
1053
1054 block_split = (pixel_per_line%y_block_size) ? 1 : 0; //are some blocks splitted into different lines?
1055
1056 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1057 + block_split * uv_block_size;
1058
1059 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1060 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1061 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1062 + (4 - block_split) * sub_block_size);
1063
1064 for (block = 0; block < (pixel_per_line / sub_block_size);
1065 block++) {
1066
1067
1068 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1069 scratch_get(usbvision, &y[0], 2);
1070 scratch_get_extra(usbvision, &u, &u_ptr, 1);
1071 scratch_get_extra(usbvision, &v, &v_ptr, 1);
1072
1073 //I don't use the YUV_TO_RGB macro for better performance
1074 v_ = v - 128;
1075 u_ = u - 128;
1076 vb = 132252 * v_;
1077 uvg= -53281 * u_ - 25625 * v_;
1078 ur = 104595 * u_;
1079
1080 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1081 *f_even++ = y[0];
1082 *f_even++ = v;
1083 }
1084 else {
1085 y_ = 76284 * (y[0] - 16);
1086
1087 b_ = (y_ + vb) >> 16;
1088 g_ = (y_ + uvg)>> 16;
1089 r_ = (y_ + ur) >> 16;
1090
1091 switch (frame->v4l2_format.format) {
1092 case V4L2_PIX_FMT_RGB565:
1093 g = LIMIT_RGB(g_);
1094 *f_even++ =
1095 (0x1F & LIMIT_RGB(r_)) |
1096 (0xE0 & (g << 5));
1097 *f_even++ =
1098 (0x07 & (g >> 3)) |
1099 (0xF8 & LIMIT_RGB(b_));
1100 break;
1101 case V4L2_PIX_FMT_RGB24:
1102 *f_even++ = LIMIT_RGB(r_);
1103 *f_even++ = LIMIT_RGB(g_);
1104 *f_even++ = LIMIT_RGB(b_);
1105 break;
1106 case V4L2_PIX_FMT_RGB32:
1107 *f_even++ = LIMIT_RGB(r_);
1108 *f_even++ = LIMIT_RGB(g_);
1109 *f_even++ = LIMIT_RGB(b_);
1110 f_even++;
1111 break;
1112 case V4L2_PIX_FMT_RGB555:
1113 g = LIMIT_RGB(g_);
1114 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1115 (0xE0 & (g << 5));
1116 *f_even++ = (0x03 & (g >> 3)) |
1117 (0x7C & (LIMIT_RGB(b_) << 2));
1118 break;
1119 }
1120 }
1121 clipmask_even_index += clipmask_add;
1122 f_even += stretch_bytes;
1123
1124 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1125 *f_even++ = y[1];
1126 *f_even++ = u;
1127 }
1128 else {
1129 y_ = 76284 * (y[1] - 16);
1130
1131 b_ = (y_ + vb) >> 16;
1132 g_ = (y_ + uvg)>> 16;
1133 r_ = (y_ + ur) >> 16;
1134
1135 switch (frame->v4l2_format.format) {
1136 case V4L2_PIX_FMT_RGB565:
1137 g = LIMIT_RGB(g_);
1138 *f_even++ =
1139 (0x1F & LIMIT_RGB(r_)) |
1140 (0xE0 & (g << 5));
1141 *f_even++ =
1142 (0x07 & (g >> 3)) |
1143 (0xF8 & LIMIT_RGB(b_));
1144 break;
1145 case V4L2_PIX_FMT_RGB24:
1146 *f_even++ = LIMIT_RGB(r_);
1147 *f_even++ = LIMIT_RGB(g_);
1148 *f_even++ = LIMIT_RGB(b_);
1149 break;
1150 case V4L2_PIX_FMT_RGB32:
1151 *f_even++ = LIMIT_RGB(r_);
1152 *f_even++ = LIMIT_RGB(g_);
1153 *f_even++ = LIMIT_RGB(b_);
1154 f_even++;
1155 break;
1156 case V4L2_PIX_FMT_RGB555:
1157 g = LIMIT_RGB(g_);
1158 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1159 (0xE0 & (g << 5));
1160 *f_even++ = (0x03 & (g >> 3)) |
1161 (0x7C & (LIMIT_RGB(b_) << 2));
1162 break;
1163 }
1164 }
1165 clipmask_even_index += clipmask_add;
1166 f_even += stretch_bytes;
1167
1168 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1169
1170 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1171 *f_odd++ = y[0];
1172 *f_odd++ = v;
1173 }
1174 else {
1175 y_ = 76284 * (y[0] - 16);
1176
1177 b_ = (y_ + vb) >> 16;
1178 g_ = (y_ + uvg)>> 16;
1179 r_ = (y_ + ur) >> 16;
1180
1181 switch (frame->v4l2_format.format) {
1182 case V4L2_PIX_FMT_RGB565:
1183 g = LIMIT_RGB(g_);
1184 *f_odd++ =
1185 (0x1F & LIMIT_RGB(r_)) |
1186 (0xE0 & (g << 5));
1187 *f_odd++ =
1188 (0x07 & (g >> 3)) |
1189 (0xF8 & LIMIT_RGB(b_));
1190 break;
1191 case V4L2_PIX_FMT_RGB24:
1192 *f_odd++ = LIMIT_RGB(r_);
1193 *f_odd++ = LIMIT_RGB(g_);
1194 *f_odd++ = LIMIT_RGB(b_);
1195 break;
1196 case V4L2_PIX_FMT_RGB32:
1197 *f_odd++ = LIMIT_RGB(r_);
1198 *f_odd++ = LIMIT_RGB(g_);
1199 *f_odd++ = LIMIT_RGB(b_);
1200 f_odd++;
1201 break;
1202 case V4L2_PIX_FMT_RGB555:
1203 g = LIMIT_RGB(g_);
1204 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1205 (0xE0 & (g << 5));
1206 *f_odd++ = (0x03 & (g >> 3)) |
1207 (0x7C & (LIMIT_RGB(b_) << 2));
1208 break;
1209 }
1210 }
1211 clipmask_odd_index += clipmask_add;
1212 f_odd += stretch_bytes;
1213
1214 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1215 *f_odd++ = y[1];
1216 *f_odd++ = u;
1217 }
1218 else {
1219 y_ = 76284 * (y[1] - 16);
1220
1221 b_ = (y_ + vb) >> 16;
1222 g_ = (y_ + uvg)>> 16;
1223 r_ = (y_ + ur) >> 16;
1224
1225 switch (frame->v4l2_format.format) {
1226 case V4L2_PIX_FMT_RGB565:
1227 g = LIMIT_RGB(g_);
1228 *f_odd++ =
1229 (0x1F & LIMIT_RGB(r_)) |
1230 (0xE0 & (g << 5));
1231 *f_odd++ =
1232 (0x07 & (g >> 3)) |
1233 (0xF8 & LIMIT_RGB(b_));
1234 break;
1235 case V4L2_PIX_FMT_RGB24:
1236 *f_odd++ = LIMIT_RGB(r_);
1237 *f_odd++ = LIMIT_RGB(g_);
1238 *f_odd++ = LIMIT_RGB(b_);
1239 break;
1240 case V4L2_PIX_FMT_RGB32:
1241 *f_odd++ = LIMIT_RGB(r_);
1242 *f_odd++ = LIMIT_RGB(g_);
1243 *f_odd++ = LIMIT_RGB(b_);
1244 f_odd++;
1245 break;
1246 case V4L2_PIX_FMT_RGB555:
1247 g = LIMIT_RGB(g_);
1248 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1249 (0xE0 & (g << 5));
1250 *f_odd++ = (0x03 & (g >> 3)) |
1251 (0x7C & (LIMIT_RGB(b_) << 2));
1252 break;
1253 }
1254 }
1255 clipmask_odd_index += clipmask_add;
1256 f_odd += stretch_bytes;
1257 }
1258
1259 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1260 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1261 * sub_block_size);
1262 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1263 * sub_block_size);
1264 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1265 * sub_block_size);
1266 }
1267
1268 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1269 + block_split * sub_block_size);
1270
1271 frame->curline += 2 * usbvision->stretch_height;
1272 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1273
1274 if (frame->curline >= frame->frmheight)
1275 return ParseState_NextFrame;
1276 else
1277 return ParseState_Continue;
1278 }
1279
1280 /*
1281 * usbvision_parse_data()
1282 *
1283 * Generic routine to parse the scratch buffer. It employs either
1284 * usbvision_find_header() or usbvision_parse_lines() to do most
1285 * of work.
1286 *
1287 */
1288 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1289 {
1290 struct usbvision_frame *frame;
1291 enum ParseState newstate;
1292 long copylen = 0;
1293 unsigned long lock_flags;
1294
1295 frame = usbvision->curFrame;
1296
1297 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1298
1299 while (1) {
1300
1301 newstate = ParseState_Out;
1302 if (scratch_len(usbvision)) {
1303 if (frame->scanstate == ScanState_Scanning) {
1304 newstate = usbvision_find_header(usbvision);
1305 }
1306 else if (frame->scanstate == ScanState_Lines) {
1307 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1308 newstate = usbvision_parse_lines_420(usbvision, &copylen);
1309 }
1310 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1311 newstate = usbvision_parse_lines_422(usbvision, &copylen);
1312 }
1313 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1314 newstate = usbvision_parse_compress(usbvision, &copylen);
1315 }
1316
1317 }
1318 }
1319 if (newstate == ParseState_Continue) {
1320 continue;
1321 }
1322 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1323 break;
1324 }
1325 else {
1326 return; /* ParseState_EndParse */
1327 }
1328 }
1329
1330 if (newstate == ParseState_NextFrame) {
1331 frame->grabstate = FrameState_Done;
1332 do_gettimeofday(&(frame->timestamp));
1333 frame->sequence = usbvision->frame_num;
1334
1335 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1336 list_move_tail(&(frame->frame), &usbvision->outqueue);
1337 usbvision->curFrame = NULL;
1338 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1339
1340 usbvision->frame_num++;
1341
1342 /* This will cause the process to request another frame. */
1343 if (waitqueue_active(&usbvision->wait_frame)) {
1344 PDEBUG(DBG_PARSE, "Wake up !");
1345 wake_up_interruptible(&usbvision->wait_frame);
1346 }
1347 }
1348 else
1349 frame->grabstate = FrameState_Grabbing;
1350
1351
1352 /* Update the frame's uncompressed length. */
1353 frame->scanlength += copylen;
1354 }
1355
1356
1357 /*
1358 * Make all of the blocks of data contiguous
1359 */
1360 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1361 struct urb *urb)
1362 {
1363 unsigned char *packet_data;
1364 int i, totlen = 0;
1365
1366 for (i = 0; i < urb->number_of_packets; i++) {
1367 int packet_len = urb->iso_frame_desc[i].actual_length;
1368 int packet_stat = urb->iso_frame_desc[i].status;
1369
1370 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1371
1372 /* Detect and ignore errored packets */
1373 if (packet_stat) { // packet_stat != 0 ?????????????
1374 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1375 usbvision->isocErrCount++;
1376 continue;
1377 }
1378
1379 /* Detect and ignore empty packets */
1380 if (packet_len < 0) {
1381 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1382 usbvision->isocSkipCount++;
1383 continue;
1384 }
1385 else if (packet_len == 0) { /* Frame end ????? */
1386 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1387 usbvision->isocstate=IsocState_NoFrame;
1388 usbvision->isocSkipCount++;
1389 continue;
1390 }
1391 else if (packet_len > usbvision->isocPacketSize) {
1392 PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1393 usbvision->isocSkipCount++;
1394 continue;
1395 }
1396
1397 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1398
1399 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1400 usbvision->isocstate=IsocState_InFrame;
1401 scratch_mark_header(usbvision);
1402 usbvision_measure_bandwidth(usbvision);
1403 PDEBUG(DBG_ISOC, "packet with header");
1404 }
1405
1406 /*
1407 * If usbvision continues to feed us with data but there is no
1408 * consumption (if, for example, V4L client fell asleep) we
1409 * may overflow the buffer. We have to move old data over to
1410 * free room for new data. This is bad for old data. If we
1411 * just drop new data then it's bad for new data... choose
1412 * your favorite evil here.
1413 */
1414 if (scratch_free(usbvision) < packet_len) {
1415
1416 usbvision->scratch_ovf_count++;
1417 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1418 scratch_len(usbvision), packet_len);
1419 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1420 }
1421
1422 /* Now we know that there is enough room in scratch buffer */
1423 scratch_put(usbvision, packet_data, packet_len);
1424 totlen += packet_len;
1425 usbvision->isocDataCount += packet_len;
1426 usbvision->isocPacketCount++;
1427 }
1428 #if ENABLE_HEXDUMP
1429 if (totlen > 0) {
1430 static int foo;
1431 if (foo < 1) {
1432 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1433 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1434 ++foo;
1435 }
1436 }
1437 #endif
1438 return totlen;
1439 }
1440
1441 static void usbvision_isocIrq(struct urb *urb)
1442 {
1443 int errCode = 0;
1444 int len;
1445 struct usb_usbvision *usbvision = urb->context;
1446 int i;
1447 unsigned long startTime = jiffies;
1448 struct usbvision_frame **f;
1449
1450 /* We don't want to do anything if we are about to be removed! */
1451 if (!USBVISION_IS_OPERATIONAL(usbvision))
1452 return;
1453
1454 /* any urb with wrong status is ignored without acknowledgement */
1455 if (urb->status == -ENOENT) {
1456 return;
1457 }
1458
1459 f = &usbvision->curFrame;
1460
1461 /* Manage streaming interruption */
1462 if (usbvision->streaming == Stream_Interrupt) {
1463 usbvision->streaming = Stream_Idle;
1464 if ((*f)) {
1465 (*f)->grabstate = FrameState_Ready;
1466 (*f)->scanstate = ScanState_Scanning;
1467 }
1468 PDEBUG(DBG_IRQ, "stream interrupted");
1469 wake_up_interruptible(&usbvision->wait_stream);
1470 }
1471
1472 /* Copy the data received into our scratch buffer */
1473 len = usbvision_compress_isochronous(usbvision, urb);
1474
1475 usbvision->isocUrbCount++;
1476 usbvision->urb_length = len;
1477
1478 if (usbvision->streaming == Stream_On) {
1479
1480 /* If we collected enough data let's parse! */
1481 if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) &&
1482 (!list_empty(&(usbvision->inqueue))) ) {
1483 if (!(*f)) {
1484 (*f) = list_entry(usbvision->inqueue.next,
1485 struct usbvision_frame,
1486 frame);
1487 }
1488 usbvision_parse_data(usbvision);
1489 }
1490 else {
1491 /*If we don't have a frame
1492 we're current working on, complain */
1493 PDEBUG(DBG_IRQ,
1494 "received data, but no one needs it");
1495 scratch_reset(usbvision);
1496 }
1497 }
1498 else {
1499 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1500 scratch_reset(usbvision);
1501 }
1502
1503 usbvision->timeInIrq += jiffies - startTime;
1504
1505 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1506 urb->iso_frame_desc[i].status = 0;
1507 urb->iso_frame_desc[i].actual_length = 0;
1508 }
1509
1510 urb->status = 0;
1511 urb->dev = usbvision->dev;
1512 errCode = usb_submit_urb (urb, GFP_ATOMIC);
1513
1514 if(errCode) {
1515 dev_err(&usbvision->dev->dev,
1516 "%s: usb_submit_urb failed: error %d\n",
1517 __func__, errCode);
1518 }
1519
1520 return;
1521 }
1522
1523 /*************************************/
1524 /* Low level usbvision access functions */
1525 /*************************************/
1526
1527 /*
1528 * usbvision_read_reg()
1529 *
1530 * return < 0 -> Error
1531 * >= 0 -> Data
1532 */
1533
1534 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1535 {
1536 int errCode = 0;
1537 unsigned char buffer[1];
1538
1539 if (!USBVISION_IS_OPERATIONAL(usbvision))
1540 return -1;
1541
1542 errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1543 USBVISION_OP_CODE,
1544 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1545 0, (__u16) reg, buffer, 1, HZ);
1546
1547 if (errCode < 0) {
1548 dev_err(&usbvision->dev->dev,
1549 "%s: failed: error %d\n", __func__, errCode);
1550 return errCode;
1551 }
1552 return buffer[0];
1553 }
1554
1555 /*
1556 * usbvision_write_reg()
1557 *
1558 * return 1 -> Reg written
1559 * 0 -> usbvision is not yet ready
1560 * -1 -> Something went wrong
1561 */
1562
1563 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1564 unsigned char value)
1565 {
1566 int errCode = 0;
1567
1568 if (!USBVISION_IS_OPERATIONAL(usbvision))
1569 return 0;
1570
1571 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1572 USBVISION_OP_CODE,
1573 USB_DIR_OUT | USB_TYPE_VENDOR |
1574 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1575
1576 if (errCode < 0) {
1577 dev_err(&usbvision->dev->dev,
1578 "%s: failed: error %d\n", __func__, errCode);
1579 }
1580 return errCode;
1581 }
1582
1583
1584 static void usbvision_ctrlUrb_complete(struct urb *urb)
1585 {
1586 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1587
1588 PDEBUG(DBG_IRQ, "");
1589 usbvision->ctrlUrbBusy = 0;
1590 if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1591 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1592 }
1593 }
1594
1595
1596 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1597 unsigned char *data, int len)
1598 {
1599 int errCode = 0;
1600
1601 PDEBUG(DBG_IRQ, "");
1602 if (len > 8) {
1603 return -EFAULT;
1604 }
1605 if (usbvision->ctrlUrbBusy) {
1606 return -EBUSY;
1607 }
1608 usbvision->ctrlUrbBusy = 1;
1609
1610 usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1611 usbvision->ctrlUrbSetup.bRequest = USBVISION_OP_CODE;
1612 usbvision->ctrlUrbSetup.wValue = 0;
1613 usbvision->ctrlUrbSetup.wIndex = cpu_to_le16(address);
1614 usbvision->ctrlUrbSetup.wLength = cpu_to_le16(len);
1615 usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1616 usb_sndctrlpipe(usbvision->dev, 1),
1617 (unsigned char *)&usbvision->ctrlUrbSetup,
1618 (void *)usbvision->ctrlUrbBuffer, len,
1619 usbvision_ctrlUrb_complete,
1620 (void *)usbvision);
1621
1622 memcpy(usbvision->ctrlUrbBuffer, data, len);
1623
1624 errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1625 if (errCode < 0) {
1626 // error in usb_submit_urb()
1627 usbvision->ctrlUrbBusy = 0;
1628 }
1629 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1630 return errCode;
1631 }
1632
1633
1634 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1635 {
1636 int errCode = 0;
1637
1638 usbvision->lastIsocFrameNum = -1;
1639 usbvision->isocDataCount = 0;
1640 usbvision->isocPacketCount = 0;
1641 usbvision->isocSkipCount = 0;
1642 usbvision->comprLevel = 50;
1643 usbvision->lastComprLevel = -1;
1644 usbvision->isocUrbCount = 0;
1645 usbvision->requestIntra = 1;
1646 usbvision->isocMeasureBandwidthCount = 0;
1647
1648 return errCode;
1649 }
1650
1651 /* this function measures the used bandwidth since last call
1652 * return: 0 : no error
1653 * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1654 */
1655 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1656 {
1657 int errCode = 0;
1658
1659 if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1660 usbvision->isocMeasureBandwidthCount++;
1661 return errCode;
1662 }
1663 if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1664 usbvision->usedBandwidth = usbvision->isocDataCount /
1665 (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1666 100 / usbvision->isocPacketSize;
1667 }
1668 usbvision->isocMeasureBandwidthCount = 0;
1669 usbvision->isocDataCount = 0;
1670 usbvision->isocPacketCount = 0;
1671 usbvision->isocSkipCount = 0;
1672 return errCode;
1673 }
1674
1675 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1676 {
1677 int errCode = 0;
1678 unsigned char buffer[6];
1679
1680 PDEBUG(DBG_IRQ, "");
1681 if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1682 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1683 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1684 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1685 int distorsion;
1686 if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1687 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM Threshold 1
1688 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM Threshold 2
1689 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1690 buffer[2] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (inter)
1691 buffer[3] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (intra)
1692 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1693 buffer[4] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (inter)
1694 buffer[5] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (intra)
1695 }
1696 else { //BRIDGE_NT1003
1697 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM threshold 1
1698 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM threshold 2
1699 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1700 buffer[2] = (unsigned char)(distorsion & 0xFF); // distorsion threshold bit0-7
1701 buffer[3] = 0; //(unsigned char)((distorsion >> 8) & 0x0F); // distorsion threshold bit 8-11
1702 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1703 buffer[4] = (unsigned char)(distorsion & 0xFF); // maximum distorsion bit0-7
1704 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01); // maximum distorsion bit 8
1705 }
1706 errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1707 if (errCode == 0){
1708 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1709 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1710 usbvision->lastComprLevel = usbvision->comprLevel;
1711 }
1712 }
1713 }
1714 return errCode;
1715 }
1716
1717 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1718 {
1719 int errCode = 0;
1720 unsigned char buffer[1];
1721
1722 PDEBUG(DBG_IRQ, "");
1723 usbvision->requestIntra = 1;
1724 buffer[0] = 1;
1725 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1726 return errCode;
1727 }
1728
1729 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1730 {
1731 int errCode = 0;
1732 unsigned char buffer[1];
1733
1734 PDEBUG(DBG_IRQ, "");
1735 usbvision->requestIntra = 0;
1736 buffer[0] = 0;
1737 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1738 return errCode;
1739 }
1740
1741 /*******************************
1742 * usbvision utility functions
1743 *******************************/
1744
1745 int usbvision_power_off(struct usb_usbvision *usbvision)
1746 {
1747 int errCode = 0;
1748
1749 PDEBUG(DBG_FUNC, "");
1750
1751 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1752 if (errCode == 1) {
1753 usbvision->power = 0;
1754 }
1755 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1756 return errCode;
1757 }
1758
1759 /*
1760 * usbvision_set_video_format()
1761 *
1762 */
1763 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1764 {
1765 static const char proc[] = "usbvision_set_video_format";
1766 int rc;
1767 unsigned char value[2];
1768
1769 if (!USBVISION_IS_OPERATIONAL(usbvision))
1770 return 0;
1771
1772 PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1773
1774 if ((format != ISOC_MODE_YUV422)
1775 && (format != ISOC_MODE_YUV420)
1776 && (format != ISOC_MODE_COMPRESS)) {
1777 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1778 format);
1779 format = ISOC_MODE_YUV420;
1780 }
1781 value[0] = 0x0A; //TODO: See the effect of the filter
1782 value[1] = format; // Sets the VO_MODE register which follows FILT_CONT
1783 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1784 USBVISION_OP_CODE,
1785 USB_DIR_OUT | USB_TYPE_VENDOR |
1786 USB_RECIP_ENDPOINT, 0,
1787 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1788
1789 if (rc < 0) {
1790 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1791 "reconnect or reload driver.\n", proc, rc);
1792 }
1793 usbvision->isocMode = format;
1794 return rc;
1795 }
1796
1797 /*
1798 * usbvision_set_output()
1799 *
1800 */
1801
1802 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1803 int height)
1804 {
1805 int errCode = 0;
1806 int UsbWidth, UsbHeight;
1807 unsigned int frameRate=0, frameDrop=0;
1808 unsigned char value[4];
1809
1810 if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1811 return 0;
1812 }
1813
1814 if (width > MAX_USB_WIDTH) {
1815 UsbWidth = width / 2;
1816 usbvision->stretch_width = 2;
1817 }
1818 else {
1819 UsbWidth = width;
1820 usbvision->stretch_width = 1;
1821 }
1822
1823 if (height > MAX_USB_HEIGHT) {
1824 UsbHeight = height / 2;
1825 usbvision->stretch_height = 2;
1826 }
1827 else {
1828 UsbHeight = height;
1829 usbvision->stretch_height = 1;
1830 }
1831
1832 RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1833 UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1834 RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1835 UsbHeight &= ~(1);
1836
1837 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1838 UsbWidth, UsbHeight, width, height,
1839 usbvision->stretch_width, usbvision->stretch_height);
1840
1841 /* I'll not rewrite the same values */
1842 if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1843 value[0] = UsbWidth & 0xff; //LSB
1844 value[1] = (UsbWidth >> 8) & 0x03; //MSB
1845 value[2] = UsbHeight & 0xff; //LSB
1846 value[3] = (UsbHeight >> 8) & 0x03; //MSB
1847
1848 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1849 USBVISION_OP_CODE,
1850 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1851 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1852
1853 if (errCode < 0) {
1854 dev_err(&usbvision->dev->dev,
1855 "%s failed: error %d\n", __func__, errCode);
1856 return errCode;
1857 }
1858 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1859 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1860 }
1861
1862 if (usbvision->isocMode == ISOC_MODE_YUV422) {
1863 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1864 }
1865 else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1866 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1867 }
1868 else {
1869 frameRate = FRAMERATE_MAX;
1870 }
1871
1872 if (usbvision->tvnormId & V4L2_STD_625_50) {
1873 frameDrop = frameRate * 32 / 25 - 1;
1874 }
1875 else if (usbvision->tvnormId & V4L2_STD_525_60) {
1876 frameDrop = frameRate * 32 / 30 - 1;
1877 }
1878
1879 RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1880
1881 PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1882
1883 frameDrop = FRAMERATE_MAX; // We can allow the maximum here, because dropping is controlled
1884
1885 /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1886 => frameSkip = 4;
1887 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1888
1889 frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1890 => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1891 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1892 */
1893 errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1894 return errCode;
1895 }
1896
1897
1898 /*
1899 * usbvision_frames_alloc
1900 * allocate the required frames
1901 */
1902 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1903 {
1904 int i;
1905
1906 /*needs to be page aligned cause the buffers can be mapped individually! */
1907 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
1908 usbvision->curheight *
1909 usbvision->palette.bytes_per_pixel);
1910
1911 /* Try to do my best to allocate the frames the user want in the remaining memory */
1912 usbvision->num_frames = number_of_frames;
1913 while (usbvision->num_frames > 0) {
1914 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1915 if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
1916 break;
1917 }
1918 usbvision->num_frames--;
1919 }
1920
1921 spin_lock_init(&usbvision->queue_lock);
1922 init_waitqueue_head(&usbvision->wait_frame);
1923 init_waitqueue_head(&usbvision->wait_stream);
1924
1925 /* Allocate all buffers */
1926 for (i = 0; i < usbvision->num_frames; i++) {
1927 usbvision->frame[i].index = i;
1928 usbvision->frame[i].grabstate = FrameState_Unused;
1929 usbvision->frame[i].data = usbvision->fbuf +
1930 i * usbvision->max_frame_size;
1931 /*
1932 * Set default sizes for read operation.
1933 */
1934 usbvision->stretch_width = 1;
1935 usbvision->stretch_height = 1;
1936 usbvision->frame[i].width = usbvision->curwidth;
1937 usbvision->frame[i].height = usbvision->curheight;
1938 usbvision->frame[i].bytes_read = 0;
1939 }
1940 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
1941 return usbvision->num_frames;
1942 }
1943
1944 /*
1945 * usbvision_frames_free
1946 * frees memory allocated for the frames
1947 */
1948 void usbvision_frames_free(struct usb_usbvision *usbvision)
1949 {
1950 /* Have to free all that memory */
1951 PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
1952
1953 if (usbvision->fbuf != NULL) {
1954 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1955 usbvision->fbuf = NULL;
1956
1957 usbvision->num_frames = 0;
1958 }
1959 }
1960 /*
1961 * usbvision_empty_framequeues()
1962 * prepare queues for incoming and outgoing frames
1963 */
1964 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1965 {
1966 u32 i;
1967
1968 INIT_LIST_HEAD(&(usbvision->inqueue));
1969 INIT_LIST_HEAD(&(usbvision->outqueue));
1970
1971 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1972 usbvision->frame[i].grabstate = FrameState_Unused;
1973 usbvision->frame[i].bytes_read = 0;
1974 }
1975 }
1976
1977 /*
1978 * usbvision_stream_interrupt()
1979 * stops streaming
1980 */
1981 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1982 {
1983 int ret = 0;
1984
1985 /* stop reading from the device */
1986
1987 usbvision->streaming = Stream_Interrupt;
1988 ret = wait_event_timeout(usbvision->wait_stream,
1989 (usbvision->streaming == Stream_Idle),
1990 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1991 return ret;
1992 }
1993
1994 /*
1995 * usbvision_set_compress_params()
1996 *
1997 */
1998
1999 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
2000 {
2001 static const char proc[] = "usbvision_set_compresion_params: ";
2002 int rc;
2003 unsigned char value[6];
2004
2005 value[0] = 0x0F; // Intra-Compression cycle
2006 value[1] = 0x01; // Reg.45 one line per strip
2007 value[2] = 0x00; // Reg.46 Force intra mode on all new frames
2008 value[3] = 0x00; // Reg.47 FORCE_UP <- 0 normal operation (not force)
2009 value[4] = 0xA2; // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
2010 value[5] = 0x00; // Reg.49 DVI_YUV This has nothing to do with compression
2011
2012 //catched values for NT1004
2013 // value[0] = 0xFF; // Never apply intra mode automatically
2014 // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
2015 // value[2] = 0x01; // Force intra mode on all new frames
2016 // value[3] = 0x00; // Strip size 400 Bytes; do not force up
2017 // value[4] = 0xA2; //
2018 if (!USBVISION_IS_OPERATIONAL(usbvision))
2019 return 0;
2020
2021 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2022 USBVISION_OP_CODE,
2023 USB_DIR_OUT | USB_TYPE_VENDOR |
2024 USB_RECIP_ENDPOINT, 0,
2025 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
2026
2027 if (rc < 0) {
2028 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2029 "reconnect or reload driver.\n", proc, rc);
2030 return rc;
2031 }
2032
2033 if (usbvision->bridgeType == BRIDGE_NT1004) {
2034 value[0] = 20; // PCM Threshold 1
2035 value[1] = 12; // PCM Threshold 2
2036 value[2] = 255; // Distorsion Threshold inter
2037 value[3] = 255; // Distorsion Threshold intra
2038 value[4] = 43; // Max Distorsion inter
2039 value[5] = 43; // Max Distorsion intra
2040 }
2041 else {
2042 value[0] = 20; // PCM Threshold 1
2043 value[1] = 12; // PCM Threshold 2
2044 value[2] = 255; // Distorsion Threshold d7-d0
2045 value[3] = 0; // Distorsion Threshold d11-d8
2046 value[4] = 43; // Max Distorsion d7-d0
2047 value[5] = 0; // Max Distorsion d8
2048 }
2049
2050 if (!USBVISION_IS_OPERATIONAL(usbvision))
2051 return 0;
2052
2053 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2054 USBVISION_OP_CODE,
2055 USB_DIR_OUT | USB_TYPE_VENDOR |
2056 USB_RECIP_ENDPOINT, 0,
2057 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2058
2059 if (rc < 0) {
2060 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2061 "reconnect or reload driver.\n", proc, rc);
2062 return rc;
2063 }
2064
2065
2066 return rc;
2067 }
2068
2069
2070 /*
2071 * usbvision_set_input()
2072 *
2073 * Set the input (saa711x, ...) size x y and other misc input params
2074 * I've no idea if this parameters are right
2075 *
2076 */
2077 int usbvision_set_input(struct usb_usbvision *usbvision)
2078 {
2079 static const char proc[] = "usbvision_set_input: ";
2080 int rc;
2081 unsigned char value[8];
2082 unsigned char dvi_yuv_value;
2083
2084 if (!USBVISION_IS_OPERATIONAL(usbvision))
2085 return 0;
2086
2087 /* Set input format expected from decoder*/
2088 if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) {
2089 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1;
2090 } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2091 /* SAA7113 uses 8 bit output */
2092 value[0] = USBVISION_8_422_SYNC;
2093 } else {
2094 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2095 * as that is how saa7111 is configured */
2096 value[0] = USBVISION_16_422_SYNC;
2097 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2098 }
2099
2100 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2101 if (rc < 0) {
2102 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2103 "reconnect or reload driver.\n", proc, rc);
2104 return rc;
2105 }
2106
2107
2108 if (usbvision->tvnormId & V4L2_STD_PAL) {
2109 value[0] = 0xC0;
2110 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2111 value[2] = 0x20;
2112 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2113 value[4] = 0x60;
2114 value[5] = 0x00; //0x0060 -> 96 Input video h offset
2115 value[6] = 0x16;
2116 value[7] = 0x00; //0x0016 -> 22 Input video v offset
2117 } else if (usbvision->tvnormId & V4L2_STD_SECAM) {
2118 value[0] = 0xC0;
2119 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2120 value[2] = 0x20;
2121 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2122 value[4] = 0x01;
2123 value[5] = 0x00; //0x0001 -> 01 Input video h offset
2124 value[6] = 0x01;
2125 value[7] = 0x00; //0x0001 -> 01 Input video v offset
2126 } else { /* V4L2_STD_NTSC */
2127 value[0] = 0xD0;
2128 value[1] = 0x02; //0x02D0 -> 720 Input video line length
2129 value[2] = 0xF0;
2130 value[3] = 0x00; //0x00F0 -> 240 Input video number of lines
2131 value[4] = 0x50;
2132 value[5] = 0x00; //0x0050 -> 80 Input video h offset
2133 value[6] = 0x10;
2134 value[7] = 0x00; //0x0010 -> 16 Input video v offset
2135 }
2136
2137 if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2138 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2139 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2140 }
2141
2142 if (adjust_X_Offset != -1) {
2143 value[4] = adjust_X_Offset & 0xff;
2144 value[5] = (adjust_X_Offset & 0x0300) >> 8;
2145 }
2146
2147 if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2148 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2149 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2150 }
2151
2152 if (adjust_Y_Offset != -1) {
2153 value[6] = adjust_Y_Offset & 0xff;
2154 value[7] = (adjust_Y_Offset & 0x0300) >> 8;
2155 }
2156
2157 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2158 USBVISION_OP_CODE, /* USBVISION specific code */
2159 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2160 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2161 if (rc < 0) {
2162 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2163 "reconnect or reload driver.\n", proc, rc);
2164 return rc;
2165 }
2166
2167
2168 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2169
2170 if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){
2171 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv;
2172 }
2173 else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2174 /* This changes as the fine sync control changes. Further investigation necessary */
2175 dvi_yuv_value = 0x06;
2176 }
2177
2178 return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2179 }
2180
2181
2182 /*
2183 * usbvision_set_dram_settings()
2184 *
2185 * Set the buffer address needed by the usbvision dram to operate
2186 * This values has been taken with usbsnoop.
2187 *
2188 */
2189
2190 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2191 {
2192 int rc;
2193 unsigned char value[8];
2194
2195 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2196 value[0] = 0x42;
2197 value[1] = 0x71;
2198 value[2] = 0xff;
2199 value[3] = 0x00;
2200 value[4] = 0x98;
2201 value[5] = 0xe0;
2202 value[6] = 0x71;
2203 value[7] = 0xff;
2204 // UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2205 // FDL: 0x00000-0x0E099 = 57498 Words
2206 // VDW: 0x0E3FF-0x3FFFF
2207 }
2208 else {
2209 value[0] = 0x42;
2210 value[1] = 0x00;
2211 value[2] = 0xff;
2212 value[3] = 0x00;
2213 value[4] = 0x00;
2214 value[5] = 0x00;
2215 value[6] = 0x00;
2216 value[7] = 0xff;
2217 }
2218 /* These are the values of the address of the video buffer,
2219 * they have to be loaded into the USBVISION_DRM_PRM1-8
2220 *
2221 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2222 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2223 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2224 * Only used in compressed mode
2225 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2226 * Only used in compressed mode
2227 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2228 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2229 */
2230
2231 if (!USBVISION_IS_OPERATIONAL(usbvision))
2232 return 0;
2233
2234 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2235 USBVISION_OP_CODE, /* USBVISION specific code */
2236 USB_DIR_OUT | USB_TYPE_VENDOR |
2237 USB_RECIP_ENDPOINT, 0,
2238 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2239
2240 if (rc < 0) {
2241 dev_err(&usbvision->dev->dev, "%sERROR=%d\n", __func__, rc);
2242 return rc;
2243 }
2244
2245 /* Restart the video buffer logic */
2246 if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2247 USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2248 return rc;
2249 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2250
2251 return rc;
2252 }
2253
2254 /*
2255 * ()
2256 *
2257 * Power on the device, enables suspend-resume logic
2258 * & reset the isoc End-Point
2259 *
2260 */
2261
2262 int usbvision_power_on(struct usb_usbvision *usbvision)
2263 {
2264 int errCode = 0;
2265
2266 PDEBUG(DBG_FUNC, "");
2267
2268 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2269 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2270 USBVISION_SSPND_EN | USBVISION_RES2);
2271
2272 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2273 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2274 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2275 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2276 if (errCode == 1) {
2277 usbvision->power = 1;
2278 }
2279 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2280 return errCode;
2281 }
2282
2283
2284 /*
2285 * usbvision timer stuff
2286 */
2287
2288 // to call usbvision_power_off from task queue
2289 static void call_usbvision_power_off(struct work_struct *work)
2290 {
2291 struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2292
2293 PDEBUG(DBG_FUNC, "");
2294 if(mutex_lock_interruptible(&usbvision->lock)) {
2295 return;
2296 }
2297
2298
2299 if(usbvision->user == 0) {
2300 usbvision_i2c_unregister(usbvision);
2301
2302 usbvision_power_off(usbvision);
2303 usbvision->initialized = 0;
2304 }
2305 mutex_unlock(&usbvision->lock);
2306 }
2307
2308 static void usbvision_powerOffTimer(unsigned long data)
2309 {
2310 struct usb_usbvision *usbvision = (void *) data;
2311
2312 PDEBUG(DBG_FUNC, "");
2313 del_timer(&usbvision->powerOffTimer);
2314 INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2315 (void) schedule_work(&usbvision->powerOffWork);
2316 }
2317
2318 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2319 {
2320 init_timer(&usbvision->powerOffTimer);
2321 usbvision->powerOffTimer.data = (long) usbvision;
2322 usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2323 }
2324
2325 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2326 {
2327 mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2328 }
2329
2330 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2331 {
2332 if (timer_pending(&usbvision->powerOffTimer)) {
2333 del_timer(&usbvision->powerOffTimer);
2334 }
2335 }
2336
2337 /*
2338 * usbvision_begin_streaming()
2339 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2340 * idea about the rest
2341 */
2342 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2343 {
2344 int errCode = 0;
2345
2346 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2347 usbvision_init_compression(usbvision);
2348 }
2349 errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2350 usbvision->Vin_Reg2_Preset);
2351 return errCode;
2352 }
2353
2354 /*
2355 * usbvision_restart_isoc()
2356 * Not sure yet if touching here PWR_REG make loose the config
2357 */
2358
2359 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2360 {
2361 int ret;
2362
2363 if (
2364 (ret =
2365 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2366 USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2367 return ret;
2368 if (
2369 (ret =
2370 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2371 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2372 USBVISION_RES2)) < 0)
2373 return ret;
2374 if (
2375 (ret =
2376 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2377 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2378 usbvision->Vin_Reg2_Preset)) < 0) return ret;
2379
2380 /* TODO: schedule timeout */
2381 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2382
2383 return 0;
2384 }
2385
2386 int usbvision_audio_off(struct usb_usbvision *usbvision)
2387 {
2388 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2389 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2390 return -1;
2391 }
2392 usbvision->AudioMute = 0;
2393 usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2394 return 0;
2395 }
2396
2397 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2398 {
2399 if (!usbvision->AudioMute) {
2400 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2401 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2402 return -1;
2403 }
2404 }
2405 usbvision->AudioChannel = AudioChannel;
2406 return 0;
2407 }
2408
2409 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2410 {
2411 usbvision_set_video_format(usbvision, format);
2412 usbvision_set_dram_settings(usbvision);
2413 usbvision_set_compress_params(usbvision);
2414 usbvision_set_input(usbvision);
2415 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2416 usbvision_restart_isoc(usbvision);
2417
2418 /* cosas del PCM */
2419 return USBVISION_IS_OPERATIONAL(usbvision);
2420 }
2421
2422 int usbvision_set_alternate(struct usb_usbvision *dev)
2423 {
2424 int errCode, prev_alt = dev->ifaceAlt;
2425 int i;
2426
2427 dev->ifaceAlt=0;
2428 for(i=0;i< dev->num_alt; i++)
2429 if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt])
2430 dev->ifaceAlt=i;
2431
2432 if (dev->ifaceAlt != prev_alt) {
2433 dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt];
2434 PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize);
2435 errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt);
2436 if (errCode < 0) {
2437 dev_err(&dev->dev->dev,
2438 "cannot change alternate number to %d (error=%i)\n",
2439 dev->ifaceAlt, errCode);
2440 return errCode;
2441 }
2442 }
2443
2444 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize);
2445
2446 return 0;
2447 }
2448
2449 /*
2450 * usbvision_init_isoc()
2451 *
2452 */
2453 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2454 {
2455 struct usb_device *dev = usbvision->dev;
2456 int bufIdx, errCode, regValue;
2457 int sb_size;
2458
2459 if (!USBVISION_IS_OPERATIONAL(usbvision))
2460 return -EFAULT;
2461
2462 usbvision->curFrame = NULL;
2463 scratch_reset(usbvision);
2464
2465 /* Alternate interface 1 is is the biggest frame size */
2466 errCode = usbvision_set_alternate(usbvision);
2467 if (errCode < 0) {
2468 usbvision->last_error = errCode;
2469 return -EBUSY;
2470 }
2471 sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2472
2473 regValue = (16 - usbvision_read_reg(usbvision,
2474 USBVISION_ALTER_REG)) & 0x0F;
2475
2476 usbvision->usb_bandwidth = regValue >> 1;
2477 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2478 usbvision->usb_bandwidth);
2479
2480
2481
2482 /* We double buffer the Iso lists */
2483
2484 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2485 int j, k;
2486 struct urb *urb;
2487
2488 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2489 if (urb == NULL) {
2490 dev_err(&usbvision->dev->dev,
2491 "%s: usb_alloc_urb() failed\n", __func__);
2492 return -ENOMEM;
2493 }
2494 usbvision->sbuf[bufIdx].urb = urb;
2495 usbvision->sbuf[bufIdx].data =
2496 usb_buffer_alloc(usbvision->dev,
2497 sb_size,
2498 GFP_KERNEL,
2499 &urb->transfer_dma);
2500 urb->dev = dev;
2501 urb->context = usbvision;
2502 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2503 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
2504 urb->interval = 1;
2505 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2506 urb->complete = usbvision_isocIrq;
2507 urb->number_of_packets = USBVISION_URB_FRAMES;
2508 urb->transfer_buffer_length =
2509 usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2510 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2511 k += usbvision->isocPacketSize) {
2512 urb->iso_frame_desc[j].offset = k;
2513 urb->iso_frame_desc[j].length =
2514 usbvision->isocPacketSize;
2515 }
2516 }
2517
2518 /* Submit all URBs */
2519 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2520 errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb,
2521 GFP_KERNEL);
2522 if (errCode) {
2523 dev_err(&usbvision->dev->dev,
2524 "%s: usb_submit_urb(%d) failed: error %d\n",
2525 __func__, bufIdx, errCode);
2526 }
2527 }
2528
2529 usbvision->streaming = Stream_Idle;
2530 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2531 __func__,
2532 usbvision->video_endp);
2533 return 0;
2534 }
2535
2536 /*
2537 * usbvision_stop_isoc()
2538 *
2539 * This procedure stops streaming and deallocates URBs. Then it
2540 * activates zero-bandwidth alt. setting of the video interface.
2541 *
2542 */
2543 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2544 {
2545 int bufIdx, errCode, regValue;
2546 int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2547
2548 if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2549 return;
2550
2551 /* Unschedule all of the iso td's */
2552 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2553 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2554 if (usbvision->sbuf[bufIdx].data){
2555 usb_buffer_free(usbvision->dev,
2556 sb_size,
2557 usbvision->sbuf[bufIdx].data,
2558 usbvision->sbuf[bufIdx].urb->transfer_dma);
2559 }
2560 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2561 usbvision->sbuf[bufIdx].urb = NULL;
2562 }
2563
2564 PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __func__);
2565 usbvision->streaming = Stream_Off;
2566
2567 if (!usbvision->remove_pending) {
2568
2569 /* Set packet size to 0 */
2570 usbvision->ifaceAlt=0;
2571 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2572 usbvision->ifaceAlt);
2573 if (errCode < 0) {
2574 dev_err(&usbvision->dev->dev,
2575 "%s: usb_set_interface() failed: error %d\n",
2576 __func__, errCode);
2577 usbvision->last_error = errCode;
2578 }
2579 regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2580 usbvision->isocPacketSize =
2581 (regValue == 0) ? 0 : (regValue * 64) - 1;
2582 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2583 usbvision->isocPacketSize);
2584
2585 usbvision->usb_bandwidth = regValue >> 1;
2586 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2587 usbvision->usb_bandwidth);
2588 }
2589 }
2590
2591 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2592 {
2593 /* inputs #0 and #3 are constant for every SAA711x. */
2594 /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2595 int mode[4]= {SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3};
2596 int audio[]= {1, 0, 0, 0};
2597 //channel 0 is TV with audiochannel 1 (tuner mono)
2598 //channel 1 is Composite with audio channel 0 (line in)
2599 //channel 2 is S-Video with audio channel 0 (line in)
2600 //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2601
2602 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2603 usbvision->ctl_input = channel;
2604
2605 // set the new channel
2606 // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2607 // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2608
2609 switch (usbvision_device_data[usbvision->DevModel].Codec) {
2610 case CODEC_SAA7113:
2611 mode[1] = SAA7115_COMPOSITE2;
2612 if (SwitchSVideoInput) {
2613 /* To handle problems with S-Video Input for
2614 * some devices. Use SwitchSVideoInput
2615 * parameter when loading the module.*/
2616 mode[2] = SAA7115_COMPOSITE1;
2617 }
2618 else {
2619 mode[2] = SAA7115_SVIDEO1;
2620 }
2621 break;
2622 case CODEC_SAA7111:
2623 default:
2624 /* modes for saa7111 */
2625 mode[1] = SAA7115_COMPOSITE1;
2626 mode[2] = SAA7115_SVIDEO1;
2627 break;
2628 }
2629 call_all(usbvision, video, s_routing, mode[channel], 0, 0);
2630 usbvision_set_audio(usbvision, audio[channel]);
2631 return 0;
2632 }
2633
2634 /*
2635 * Overrides for Emacs so that we follow Linus's tabbing style.
2636 * ---------------------------------------------------------------------------
2637 * Local variables:
2638 * c-basic-offset: 8
2639 * End:
2640 */