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V4L/DVB (10692): usbvision: convert to v4l2_device/v4l2_subdev.
[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/video_decoder.h>
40 #include <linux/i2c.h>
41
42 #include <media/saa7115.h>
43 #include <media/v4l2-common.h>
44 #include <media/tuner.h>
45
46 #include <linux/workqueue.h>
47
48 #include "usbvision.h"
49
50 static unsigned int core_debug;
51 module_param(core_debug,int,0644);
52 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
53
54 static unsigned int force_testpattern;
55 module_param(force_testpattern,int,0644);
56 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
57
58 static int adjustCompression = 1; /* Set the compression to be adaptive */
59 module_param(adjustCompression, int, 0444);
60 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device. Default: 1 (On)");
61
62 /* To help people with Black and White output with using s-video input.
63 * Some cables and input device are wired differently. */
64 static int SwitchSVideoInput;
65 module_param(SwitchSVideoInput, int, 0444);
66 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)");
67
68 static unsigned int adjust_X_Offset = -1;
69 module_param(adjust_X_Offset, int, 0644);
70 MODULE_PARM_DESC(adjust_X_Offset, "adjust X offset display [core]");
71
72 static unsigned int adjust_Y_Offset = -1;
73 module_param(adjust_Y_Offset, int, 0644);
74 MODULE_PARM_DESC(adjust_Y_Offset, "adjust Y offset display [core]");
75
76
77 #define ENABLE_HEXDUMP 0 /* Enable if you need it */
78
79
80 #ifdef USBVISION_DEBUG
81 #define PDEBUG(level, fmt, args...) { \
82 if (core_debug & (level)) \
83 printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
84 __func__, __LINE__ , ## args); \
85 }
86 #else
87 #define PDEBUG(level, fmt, args...) do {} while(0)
88 #endif
89
90 #define DBG_HEADER 1<<0
91 #define DBG_IRQ 1<<1
92 #define DBG_ISOC 1<<2
93 #define DBG_PARSE 1<<3
94 #define DBG_SCRATCH 1<<4
95 #define DBG_FUNC 1<<5
96
97 static const int max_imgwidth = MAX_FRAME_WIDTH;
98 static const int max_imgheight = MAX_FRAME_HEIGHT;
99 static const int min_imgwidth = MIN_FRAME_WIDTH;
100 static const int min_imgheight = MIN_FRAME_HEIGHT;
101
102 /* The value of 'scratch_buf_size' affects quality of the picture
103 * in many ways. Shorter buffers may cause loss of data when client
104 * is too slow. Larger buffers are memory-consuming and take longer
105 * to work with. This setting can be adjusted, but the default value
106 * should be OK for most desktop users.
107 */
108 #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) // 128kB memory scratch buffer
109 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
110
111 // Function prototypes
112 static int usbvision_request_intra (struct usb_usbvision *usbvision);
113 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
114 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
115 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
116
117 /*******************************/
118 /* Memory management functions */
119 /*******************************/
120
121 /*
122 * Here we want the physical address of the memory.
123 * This is used when initializing the contents of the area.
124 */
125
126 static void *usbvision_rvmalloc(unsigned long size)
127 {
128 void *mem;
129 unsigned long adr;
130
131 size = PAGE_ALIGN(size);
132 mem = vmalloc_32(size);
133 if (!mem)
134 return NULL;
135
136 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
137 adr = (unsigned long) mem;
138 while (size > 0) {
139 SetPageReserved(vmalloc_to_page((void *)adr));
140 adr += PAGE_SIZE;
141 size -= PAGE_SIZE;
142 }
143
144 return mem;
145 }
146
147 static void usbvision_rvfree(void *mem, unsigned long size)
148 {
149 unsigned long adr;
150
151 if (!mem)
152 return;
153
154 size = PAGE_ALIGN(size);
155
156 adr = (unsigned long) mem;
157 while ((long) size > 0) {
158 ClearPageReserved(vmalloc_to_page((void *)adr));
159 adr += PAGE_SIZE;
160 size -= PAGE_SIZE;
161 }
162
163 vfree(mem);
164 }
165
166
167 #if ENABLE_HEXDUMP
168 static void usbvision_hexdump(const unsigned char *data, int len)
169 {
170 char tmp[80];
171 int i, k;
172
173 for (i = k = 0; len > 0; i++, len--) {
174 if (i > 0 && (i % 16 == 0)) {
175 printk("%s\n", tmp);
176 k = 0;
177 }
178 k += sprintf(&tmp[k], "%02x ", data[i]);
179 }
180 if (k > 0)
181 printk("%s\n", tmp);
182 }
183 #endif
184
185 /********************************
186 * scratch ring buffer handling
187 ********************************/
188 static int scratch_len(struct usb_usbvision *usbvision) /*This returns the amount of data actually in the buffer */
189 {
190 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
191 if (len < 0) {
192 len += scratch_buf_size;
193 }
194 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
195
196 return len;
197 }
198
199
200 /* This returns the free space left in the buffer */
201 static int scratch_free(struct usb_usbvision *usbvision)
202 {
203 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
204 if (free <= 0) {
205 free += scratch_buf_size;
206 }
207 if (free) {
208 free -= 1; /* at least one byte in the buffer must */
209 /* left blank, otherwise there is no chance to differ between full and empty */
210 }
211 PDEBUG(DBG_SCRATCH, "return %d\n", free);
212
213 return free;
214 }
215
216
217 /* This puts data into the buffer */
218 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
219 int len)
220 {
221 int len_part;
222
223 if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
224 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
225 usbvision->scratch_write_ptr += len;
226 }
227 else {
228 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
229 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
230 if (len == len_part) {
231 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */
232 }
233 else {
234 memcpy(usbvision->scratch, data + len_part, len - len_part);
235 usbvision->scratch_write_ptr = len - len_part;
236 }
237 }
238
239 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
240
241 return len;
242 }
243
244 /* This marks the write_ptr as position of new frame header */
245 static void scratch_mark_header(struct usb_usbvision *usbvision)
246 {
247 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
248
249 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
250 usbvision->scratch_write_ptr;
251 usbvision->scratch_headermarker_write_ptr += 1;
252 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
253 }
254
255 /* This gets data from the buffer at the given "ptr" position */
256 static int scratch_get_extra(struct usb_usbvision *usbvision,
257 unsigned char *data, int *ptr, int len)
258 {
259 int len_part;
260 if (*ptr + len < scratch_buf_size) {
261 memcpy(data, usbvision->scratch + *ptr, len);
262 *ptr += len;
263 }
264 else {
265 len_part = scratch_buf_size - *ptr;
266 memcpy(data, usbvision->scratch + *ptr, len_part);
267 if (len == len_part) {
268 *ptr = 0; /* just set the y_ptr to zero */
269 }
270 else {
271 memcpy(data + len_part, usbvision->scratch, len - len_part);
272 *ptr = len - len_part;
273 }
274 }
275
276 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
277
278 return len;
279 }
280
281
282 /* This sets the scratch extra read pointer */
283 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
284 int len)
285 {
286 *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
287
288 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
289 }
290
291
292 /*This increments the scratch extra read pointer */
293 static void scratch_inc_extra_ptr(int *ptr, int len)
294 {
295 *ptr = (*ptr + len) % scratch_buf_size;
296
297 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
298 }
299
300
301 /* This gets data from the buffer */
302 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
303 int len)
304 {
305 int len_part;
306 if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
307 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
308 usbvision->scratch_read_ptr += len;
309 }
310 else {
311 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
312 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
313 if (len == len_part) {
314 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */
315 }
316 else {
317 memcpy(data + len_part, usbvision->scratch, len - len_part);
318 usbvision->scratch_read_ptr = len - len_part;
319 }
320 }
321
322 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
323
324 return len;
325 }
326
327
328 /* This sets read pointer to next header and returns it */
329 static int scratch_get_header(struct usb_usbvision *usbvision,
330 struct usbvision_frame_header *header)
331 {
332 int errCode = 0;
333
334 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
335
336 while (usbvision->scratch_headermarker_write_ptr -
337 usbvision->scratch_headermarker_read_ptr != 0) {
338 usbvision->scratch_read_ptr =
339 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
340 usbvision->scratch_headermarker_read_ptr += 1;
341 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
342 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
343 if ((header->magic_1 == USBVISION_MAGIC_1)
344 && (header->magic_2 == USBVISION_MAGIC_2)
345 && (header->headerLength == USBVISION_HEADER_LENGTH)) {
346 errCode = USBVISION_HEADER_LENGTH;
347 header->frameWidth = header->frameWidthLo + (header->frameWidthHi << 8);
348 header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
349 break;
350 }
351 }
352
353 return errCode;
354 }
355
356
357 /*This removes len bytes of old data from the buffer */
358 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
359 {
360
361 usbvision->scratch_read_ptr += len;
362 usbvision->scratch_read_ptr %= scratch_buf_size;
363 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
364 }
365
366
367 /*This resets the buffer - kills all data in it too */
368 static void scratch_reset(struct usb_usbvision *usbvision)
369 {
370 PDEBUG(DBG_SCRATCH, "\n");
371
372 usbvision->scratch_read_ptr = 0;
373 usbvision->scratch_write_ptr = 0;
374 usbvision->scratch_headermarker_read_ptr = 0;
375 usbvision->scratch_headermarker_write_ptr = 0;
376 usbvision->isocstate = IsocState_NoFrame;
377 }
378
379 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
380 {
381 usbvision->scratch = vmalloc_32(scratch_buf_size);
382 scratch_reset(usbvision);
383 if(usbvision->scratch == NULL) {
384 dev_err(&usbvision->dev->dev,
385 "%s: unable to allocate %d bytes for scratch\n",
386 __func__, scratch_buf_size);
387 return -ENOMEM;
388 }
389 return 0;
390 }
391
392 void usbvision_scratch_free(struct usb_usbvision *usbvision)
393 {
394 if (usbvision->scratch != NULL) {
395 vfree(usbvision->scratch);
396 usbvision->scratch = NULL;
397 }
398 }
399
400 /*
401 * usbvision_testpattern()
402 *
403 * Procedure forms a test pattern (yellow grid on blue background).
404 *
405 * Parameters:
406 * fullframe: if TRUE then entire frame is filled, otherwise the procedure
407 * continues from the current scanline.
408 * pmode 0: fill the frame with solid blue color (like on VCR or TV)
409 * 1: Draw a colored grid
410 *
411 */
412 static void usbvision_testpattern(struct usb_usbvision *usbvision,
413 int fullframe, int pmode)
414 {
415 static const char proc[] = "usbvision_testpattern";
416 struct usbvision_frame *frame;
417 unsigned char *f;
418 int num_cell = 0;
419 int scan_length = 0;
420 static int num_pass;
421
422 if (usbvision == NULL) {
423 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
424 return;
425 }
426 if (usbvision->curFrame == NULL) {
427 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
428 return;
429 }
430
431 /* Grab the current frame */
432 frame = usbvision->curFrame;
433
434 /* Optionally start at the beginning */
435 if (fullframe) {
436 frame->curline = 0;
437 frame->scanlength = 0;
438 }
439
440 /* Form every scan line */
441 for (; frame->curline < frame->frmheight; frame->curline++) {
442 int i;
443
444 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
445 for (i = 0; i < usbvision->curwidth; i++) {
446 unsigned char cb = 0x80;
447 unsigned char cg = 0;
448 unsigned char cr = 0;
449
450 if (pmode == 1) {
451 if (frame->curline % 32 == 0)
452 cb = 0, cg = cr = 0xFF;
453 else if (i % 32 == 0) {
454 if (frame->curline % 32 == 1)
455 num_cell++;
456 cb = 0, cg = cr = 0xFF;
457 } else {
458 cb =
459 ((num_cell * 7) +
460 num_pass) & 0xFF;
461 cg =
462 ((num_cell * 5) +
463 num_pass * 2) & 0xFF;
464 cr =
465 ((num_cell * 3) +
466 num_pass * 3) & 0xFF;
467 }
468 } else {
469 /* Just the blue screen */
470 }
471
472 *f++ = cb;
473 *f++ = cg;
474 *f++ = cr;
475 scan_length += 3;
476 }
477 }
478
479 frame->grabstate = FrameState_Done;
480 frame->scanlength += scan_length;
481 ++num_pass;
482
483 }
484
485 /*
486 * usbvision_decompress_alloc()
487 *
488 * allocates intermediate buffer for decompression
489 */
490 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
491 {
492 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
493 usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
494 if (usbvision->IntraFrameBuffer == NULL) {
495 dev_err(&usbvision->dev->dev,
496 "%s: unable to allocate %d for compr. frame buffer\n",
497 __func__, IFB_size);
498 return -ENOMEM;
499 }
500 return 0;
501 }
502
503 /*
504 * usbvision_decompress_free()
505 *
506 * frees intermediate buffer for decompression
507 */
508 void usbvision_decompress_free(struct usb_usbvision *usbvision)
509 {
510 if (usbvision->IntraFrameBuffer != NULL) {
511 vfree(usbvision->IntraFrameBuffer);
512 usbvision->IntraFrameBuffer = NULL;
513 }
514 }
515
516 /************************************************************
517 * Here comes the data parsing stuff that is run as interrupt
518 ************************************************************/
519 /*
520 * usbvision_find_header()
521 *
522 * Locate one of supported header markers in the scratch buffer.
523 */
524 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
525 {
526 struct usbvision_frame *frame;
527 int foundHeader = 0;
528
529 frame = usbvision->curFrame;
530
531 while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
532 // found header in scratch
533 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
534 frame->isocHeader.magic_2,
535 frame->isocHeader.magic_1,
536 frame->isocHeader.headerLength,
537 frame->isocHeader.frameNum,
538 frame->isocHeader.framePhase,
539 frame->isocHeader.frameLatency,
540 frame->isocHeader.dataFormat,
541 frame->isocHeader.formatParam,
542 frame->isocHeader.frameWidth,
543 frame->isocHeader.frameHeight);
544
545 if (usbvision->requestIntra) {
546 if (frame->isocHeader.formatParam & 0x80) {
547 foundHeader = 1;
548 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
549 usbvision_unrequest_intra(usbvision);
550 break;
551 }
552 }
553 else {
554 foundHeader = 1;
555 break;
556 }
557 }
558
559 if (foundHeader) {
560 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
561 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
562 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
563 }
564 else { // no header found
565 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
566 scratch_reset(usbvision);
567 return ParseState_EndParse;
568 }
569
570 // found header
571 if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
572 //check isocHeader.frameNum for lost frames
573 if (usbvision->lastIsocFrameNum >= 0) {
574 if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
575 // unexpected frame drop: need to request new intra frame
576 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
577 usbvision_request_intra(usbvision);
578 return ParseState_NextFrame;
579 }
580 }
581 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
582 }
583 usbvision->header_count++;
584 frame->scanstate = ScanState_Lines;
585 frame->curline = 0;
586
587 if (force_testpattern) {
588 usbvision_testpattern(usbvision, 1, 1);
589 return ParseState_NextFrame;
590 }
591 return ParseState_Continue;
592 }
593
594 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
595 long *pcopylen)
596 {
597 volatile struct usbvision_frame *frame;
598 unsigned char *f;
599 int len;
600 int i;
601 unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
602 unsigned char rv, gv, bv; // RGB components
603 int clipmask_index, bytes_per_pixel;
604 int stretch_bytes, clipmask_add;
605
606 frame = usbvision->curFrame;
607 f = frame->data + (frame->v4l2_linesize * frame->curline);
608
609 /* Make sure there's enough data for the entire line */
610 len = (frame->isocHeader.frameWidth * 2)+5;
611 if (scratch_len(usbvision) < len) {
612 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
613 return ParseState_Out;
614 }
615
616 if ((frame->curline + 1) >= frame->frmheight) {
617 return ParseState_NextFrame;
618 }
619
620 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
621 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
622 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
623 clipmask_add = usbvision->stretch_width;
624
625 for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
626
627 scratch_get(usbvision, &yuyv[0], 4);
628
629 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
630 *f++ = yuyv[0]; // Y
631 *f++ = yuyv[3]; // U
632 }
633 else {
634
635 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
636 switch (frame->v4l2_format.format) {
637 case V4L2_PIX_FMT_RGB565:
638 *f++ = (0x1F & rv) |
639 (0xE0 & (gv << 5));
640 *f++ = (0x07 & (gv >> 3)) |
641 (0xF8 & bv);
642 break;
643 case V4L2_PIX_FMT_RGB24:
644 *f++ = rv;
645 *f++ = gv;
646 *f++ = bv;
647 break;
648 case V4L2_PIX_FMT_RGB32:
649 *f++ = rv;
650 *f++ = gv;
651 *f++ = bv;
652 f++;
653 break;
654 case V4L2_PIX_FMT_RGB555:
655 *f++ = (0x1F & rv) |
656 (0xE0 & (gv << 5));
657 *f++ = (0x03 & (gv >> 3)) |
658 (0x7C & (bv << 2));
659 break;
660 }
661 }
662 clipmask_index += clipmask_add;
663 f += stretch_bytes;
664
665 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
666 *f++ = yuyv[2]; // Y
667 *f++ = yuyv[1]; // V
668 }
669 else {
670
671 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
672 switch (frame->v4l2_format.format) {
673 case V4L2_PIX_FMT_RGB565:
674 *f++ = (0x1F & rv) |
675 (0xE0 & (gv << 5));
676 *f++ = (0x07 & (gv >> 3)) |
677 (0xF8 & bv);
678 break;
679 case V4L2_PIX_FMT_RGB24:
680 *f++ = rv;
681 *f++ = gv;
682 *f++ = bv;
683 break;
684 case V4L2_PIX_FMT_RGB32:
685 *f++ = rv;
686 *f++ = gv;
687 *f++ = bv;
688 f++;
689 break;
690 case V4L2_PIX_FMT_RGB555:
691 *f++ = (0x1F & rv) |
692 (0xE0 & (gv << 5));
693 *f++ = (0x03 & (gv >> 3)) |
694 (0x7C & (bv << 2));
695 break;
696 }
697 }
698 clipmask_index += clipmask_add;
699 f += stretch_bytes;
700 }
701
702 frame->curline += usbvision->stretch_height;
703 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
704
705 if (frame->curline >= frame->frmheight) {
706 return ParseState_NextFrame;
707 }
708 else {
709 return ParseState_Continue;
710 }
711 }
712
713 /* The decompression routine */
714 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
715 unsigned char *Decompressed, int *StartPos,
716 int *BlockTypeStartPos, int Len)
717 {
718 int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
719 unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
720
721 Integrator = 0;
722 Pos = *StartPos;
723 BlockTypePos = *BlockTypeStartPos;
724 MaxPos = 396; //Pos + Len;
725 ExtraPos = Pos;
726 BlockLen = 0;
727 BlockByte = 0;
728 BlockCode = 0;
729 BlockType = 0;
730 BlockTypeByte = 0;
731 BlockTypeLen = 0;
732 RestPixel = Len;
733
734 for (Idx = 0; Idx < Len; Idx++) {
735
736 if (BlockLen == 0) {
737 if (BlockTypeLen==0) {
738 BlockTypeByte = Compressed[BlockTypePos];
739 BlockTypePos++;
740 BlockTypeLen = 4;
741 }
742 BlockType = (BlockTypeByte & 0xC0) >> 6;
743
744 //statistic:
745 usbvision->ComprBlockTypes[BlockType]++;
746
747 Pos = ExtraPos;
748 if (BlockType == 0) {
749 if(RestPixel >= 24) {
750 Idx += 23;
751 RestPixel -= 24;
752 Integrator = Decompressed[Idx];
753 } else {
754 Idx += RestPixel - 1;
755 RestPixel = 0;
756 }
757 } else {
758 BlockCode = Compressed[Pos];
759 Pos++;
760 if (RestPixel >= 24) {
761 BlockLen = 24;
762 } else {
763 BlockLen = RestPixel;
764 }
765 RestPixel -= BlockLen;
766 ExtraPos = Pos + (BlockLen / 4);
767 }
768 BlockTypeByte <<= 2;
769 BlockTypeLen -= 1;
770 }
771 if (BlockLen > 0) {
772 if ((BlockLen%4) == 0) {
773 BlockByte = Compressed[Pos];
774 Pos++;
775 }
776 if (BlockType == 1) { //inter Block
777 Integrator = Decompressed[Idx];
778 }
779 switch (BlockByte & 0xC0) {
780 case 0x03<<6:
781 Integrator += Compressed[ExtraPos];
782 ExtraPos++;
783 break;
784 case 0x02<<6:
785 Integrator += BlockCode;
786 break;
787 case 0x00:
788 Integrator -= BlockCode;
789 break;
790 }
791 Decompressed[Idx] = Integrator;
792 BlockByte <<= 2;
793 BlockLen -= 1;
794 }
795 }
796 *StartPos = ExtraPos;
797 *BlockTypeStartPos = BlockTypePos;
798 return Idx;
799 }
800
801
802 /*
803 * usbvision_parse_compress()
804 *
805 * Parse compressed frame from the scratch buffer, put
806 * decoded RGB value into the current frame buffer and add the written
807 * number of bytes (RGB) to the *pcopylen.
808 *
809 */
810 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
811 long *pcopylen)
812 {
813 #define USBVISION_STRIP_MAGIC 0x5A
814 #define USBVISION_STRIP_LEN_MAX 400
815 #define USBVISION_STRIP_HEADER_LEN 3
816
817 struct usbvision_frame *frame;
818 unsigned char *f,*u = NULL ,*v = NULL;
819 unsigned char StripData[USBVISION_STRIP_LEN_MAX];
820 unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
821 int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
822 int clipmask_index, bytes_per_pixel, rc;
823 int imageSize;
824 unsigned char rv, gv, bv;
825 static unsigned char *Y, *U, *V;
826
827 frame = usbvision->curFrame;
828 imageSize = frame->frmwidth * frame->frmheight;
829 if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
830 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) { // this is a planar format
831 //... v4l2_linesize not used here.
832 f = frame->data + (frame->width * frame->curline);
833 } else
834 f = frame->data + (frame->v4l2_linesize * frame->curline);
835
836 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
837 // get base of u and b planes add halfoffset
838
839 u = frame->data
840 + imageSize
841 + (frame->frmwidth >>1) * frame->curline ;
842 v = u + (imageSize >>1 );
843
844 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
845
846 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
847 u = v + (imageSize >>2) ;
848 }
849
850 if (frame->curline == 0) {
851 usbvision_adjust_compression(usbvision);
852 }
853
854 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
855 return ParseState_Out;
856 }
857
858 //get strip header without changing the scratch_read_ptr
859 scratch_set_extra_ptr(usbvision, &StripPtr, 0);
860 scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
861 USBVISION_STRIP_HEADER_LEN);
862
863 if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
864 // wrong strip magic
865 usbvision->stripMagicErrors++;
866 return ParseState_NextFrame;
867 }
868
869 if (frame->curline != (int)StripHeader[2]) {
870 //line number missmatch error
871 usbvision->stripLineNumberErrors++;
872 }
873
874 StripLen = 2 * (unsigned int)StripHeader[1];
875 if (StripLen > USBVISION_STRIP_LEN_MAX) {
876 // strip overrun
877 // I think this never happens
878 usbvision_request_intra(usbvision);
879 }
880
881 if (scratch_len(usbvision) < StripLen) {
882 //there is not enough data for the strip
883 return ParseState_Out;
884 }
885
886 if (usbvision->IntraFrameBuffer) {
887 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
888 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
889 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
890 }
891 else {
892 return ParseState_NextFrame;
893 }
894
895 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
896 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
897
898 scratch_get(usbvision, StripData, StripLen);
899
900 IdxEnd = frame->frmwidth;
901 BlockTypePos = USBVISION_STRIP_HEADER_LEN;
902 StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
903 BlockPos = StartBlockPos;
904
905 usbvision->BlockPos = BlockPos;
906
907 if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
908 //return ParseState_Continue;
909 }
910 if (StripLen > usbvision->maxStripLen) {
911 usbvision->maxStripLen = StripLen;
912 }
913
914 if (frame->curline%2) {
915 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
916 //return ParseState_Continue;
917 }
918 }
919 else {
920 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
921 //return ParseState_Continue;
922 }
923 }
924
925 if (BlockPos > usbvision->comprBlockPos) {
926 usbvision->comprBlockPos = BlockPos;
927 }
928 if (BlockPos > StripLen) {
929 usbvision->stripLenErrors++;
930 }
931
932 for (Idx = 0; Idx < IdxEnd; Idx++) {
933 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
934 *f++ = Y[Idx];
935 *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
936 }
937 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
938 *f++ = Y[Idx];
939 if ( Idx & 0x01)
940 *u++ = U[Idx>>1] ;
941 else
942 *v++ = V[Idx>>1];
943 }
944 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
945 *f++ = Y [Idx];
946 if ( !(( Idx & 0x01 ) | ( frame->curline & 0x01 )) ){
947
948 /* only need do this for 1 in 4 pixels */
949 /* intraframe buffer is YUV420 format */
950
951 *u++ = U[Idx >>1];
952 *v++ = V[Idx >>1];
953 }
954
955 }
956 else {
957 YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
958 switch (frame->v4l2_format.format) {
959 case V4L2_PIX_FMT_GREY:
960 *f++ = Y[Idx];
961 break;
962 case V4L2_PIX_FMT_RGB555:
963 *f++ = (0x1F & rv) |
964 (0xE0 & (gv << 5));
965 *f++ = (0x03 & (gv >> 3)) |
966 (0x7C & (bv << 2));
967 break;
968 case V4L2_PIX_FMT_RGB565:
969 *f++ = (0x1F & rv) |
970 (0xE0 & (gv << 5));
971 *f++ = (0x07 & (gv >> 3)) |
972 (0xF8 & bv);
973 break;
974 case V4L2_PIX_FMT_RGB24:
975 *f++ = rv;
976 *f++ = gv;
977 *f++ = bv;
978 break;
979 case V4L2_PIX_FMT_RGB32:
980 *f++ = rv;
981 *f++ = gv;
982 *f++ = bv;
983 f++;
984 break;
985 }
986 }
987 clipmask_index++;
988 }
989 /* Deal with non-integer no. of bytes for YUV420P */
990 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
991 *pcopylen += frame->v4l2_linesize;
992 else
993 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
994
995 frame->curline += 1;
996
997 if (frame->curline >= frame->frmheight) {
998 return ParseState_NextFrame;
999 }
1000 else {
1001 return ParseState_Continue;
1002 }
1003
1004 }
1005
1006
1007 /*
1008 * usbvision_parse_lines_420()
1009 *
1010 * Parse two lines from the scratch buffer, put
1011 * decoded RGB value into the current frame buffer and add the written
1012 * number of bytes (RGB) to the *pcopylen.
1013 *
1014 */
1015 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
1016 long *pcopylen)
1017 {
1018 struct usbvision_frame *frame;
1019 unsigned char *f_even = NULL, *f_odd = NULL;
1020 unsigned int pixel_per_line, block;
1021 int pixel, block_split;
1022 int y_ptr, u_ptr, v_ptr, y_odd_offset;
1023 const int y_block_size = 128;
1024 const int uv_block_size = 64;
1025 const int sub_block_size = 32;
1026 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
1027 const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1028 unsigned char y[2], u, v; /* YUV components */
1029 int y_, u_, v_, vb, uvg, ur;
1030 int r_, g_, b_; /* RGB components */
1031 unsigned char g;
1032 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1033 int clipmask_add, stretch_bytes;
1034
1035 frame = usbvision->curFrame;
1036 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1037 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1038
1039 /* Make sure there's enough data for the entire line */
1040 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1041 /* I need two lines to decode the color */
1042 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1043 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1044 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1045 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
1046 clipmask_add = usbvision->stretch_width;
1047 pixel_per_line = frame->isocHeader.frameWidth;
1048
1049 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1050 //printk(KERN_DEBUG "out of data, need %d\n", len);
1051 return ParseState_Out;
1052 }
1053
1054 if ((frame->curline + 1) >= frame->frmheight) {
1055 return ParseState_NextFrame;
1056 }
1057
1058 block_split = (pixel_per_line%y_block_size) ? 1 : 0; //are some blocks splitted into different lines?
1059
1060 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1061 + block_split * uv_block_size;
1062
1063 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1064 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1065 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1066 + (4 - block_split) * sub_block_size);
1067
1068 for (block = 0; block < (pixel_per_line / sub_block_size);
1069 block++) {
1070
1071
1072 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1073 scratch_get(usbvision, &y[0], 2);
1074 scratch_get_extra(usbvision, &u, &u_ptr, 1);
1075 scratch_get_extra(usbvision, &v, &v_ptr, 1);
1076
1077 //I don't use the YUV_TO_RGB macro for better performance
1078 v_ = v - 128;
1079 u_ = u - 128;
1080 vb = 132252 * v_;
1081 uvg= -53281 * u_ - 25625 * v_;
1082 ur = 104595 * u_;
1083
1084 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1085 *f_even++ = y[0];
1086 *f_even++ = v;
1087 }
1088 else {
1089 y_ = 76284 * (y[0] - 16);
1090
1091 b_ = (y_ + vb) >> 16;
1092 g_ = (y_ + uvg)>> 16;
1093 r_ = (y_ + ur) >> 16;
1094
1095 switch (frame->v4l2_format.format) {
1096 case V4L2_PIX_FMT_RGB565:
1097 g = LIMIT_RGB(g_);
1098 *f_even++ =
1099 (0x1F & LIMIT_RGB(r_)) |
1100 (0xE0 & (g << 5));
1101 *f_even++ =
1102 (0x07 & (g >> 3)) |
1103 (0xF8 & LIMIT_RGB(b_));
1104 break;
1105 case V4L2_PIX_FMT_RGB24:
1106 *f_even++ = LIMIT_RGB(r_);
1107 *f_even++ = LIMIT_RGB(g_);
1108 *f_even++ = LIMIT_RGB(b_);
1109 break;
1110 case V4L2_PIX_FMT_RGB32:
1111 *f_even++ = LIMIT_RGB(r_);
1112 *f_even++ = LIMIT_RGB(g_);
1113 *f_even++ = LIMIT_RGB(b_);
1114 f_even++;
1115 break;
1116 case V4L2_PIX_FMT_RGB555:
1117 g = LIMIT_RGB(g_);
1118 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1119 (0xE0 & (g << 5));
1120 *f_even++ = (0x03 & (g >> 3)) |
1121 (0x7C & (LIMIT_RGB(b_) << 2));
1122 break;
1123 }
1124 }
1125 clipmask_even_index += clipmask_add;
1126 f_even += stretch_bytes;
1127
1128 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1129 *f_even++ = y[1];
1130 *f_even++ = u;
1131 }
1132 else {
1133 y_ = 76284 * (y[1] - 16);
1134
1135 b_ = (y_ + vb) >> 16;
1136 g_ = (y_ + uvg)>> 16;
1137 r_ = (y_ + ur) >> 16;
1138
1139 switch (frame->v4l2_format.format) {
1140 case V4L2_PIX_FMT_RGB565:
1141 g = LIMIT_RGB(g_);
1142 *f_even++ =
1143 (0x1F & LIMIT_RGB(r_)) |
1144 (0xE0 & (g << 5));
1145 *f_even++ =
1146 (0x07 & (g >> 3)) |
1147 (0xF8 & LIMIT_RGB(b_));
1148 break;
1149 case V4L2_PIX_FMT_RGB24:
1150 *f_even++ = LIMIT_RGB(r_);
1151 *f_even++ = LIMIT_RGB(g_);
1152 *f_even++ = LIMIT_RGB(b_);
1153 break;
1154 case V4L2_PIX_FMT_RGB32:
1155 *f_even++ = LIMIT_RGB(r_);
1156 *f_even++ = LIMIT_RGB(g_);
1157 *f_even++ = LIMIT_RGB(b_);
1158 f_even++;
1159 break;
1160 case V4L2_PIX_FMT_RGB555:
1161 g = LIMIT_RGB(g_);
1162 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1163 (0xE0 & (g << 5));
1164 *f_even++ = (0x03 & (g >> 3)) |
1165 (0x7C & (LIMIT_RGB(b_) << 2));
1166 break;
1167 }
1168 }
1169 clipmask_even_index += clipmask_add;
1170 f_even += stretch_bytes;
1171
1172 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1173
1174 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1175 *f_odd++ = y[0];
1176 *f_odd++ = v;
1177 }
1178 else {
1179 y_ = 76284 * (y[0] - 16);
1180
1181 b_ = (y_ + vb) >> 16;
1182 g_ = (y_ + uvg)>> 16;
1183 r_ = (y_ + ur) >> 16;
1184
1185 switch (frame->v4l2_format.format) {
1186 case V4L2_PIX_FMT_RGB565:
1187 g = LIMIT_RGB(g_);
1188 *f_odd++ =
1189 (0x1F & LIMIT_RGB(r_)) |
1190 (0xE0 & (g << 5));
1191 *f_odd++ =
1192 (0x07 & (g >> 3)) |
1193 (0xF8 & LIMIT_RGB(b_));
1194 break;
1195 case V4L2_PIX_FMT_RGB24:
1196 *f_odd++ = LIMIT_RGB(r_);
1197 *f_odd++ = LIMIT_RGB(g_);
1198 *f_odd++ = LIMIT_RGB(b_);
1199 break;
1200 case V4L2_PIX_FMT_RGB32:
1201 *f_odd++ = LIMIT_RGB(r_);
1202 *f_odd++ = LIMIT_RGB(g_);
1203 *f_odd++ = LIMIT_RGB(b_);
1204 f_odd++;
1205 break;
1206 case V4L2_PIX_FMT_RGB555:
1207 g = LIMIT_RGB(g_);
1208 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1209 (0xE0 & (g << 5));
1210 *f_odd++ = (0x03 & (g >> 3)) |
1211 (0x7C & (LIMIT_RGB(b_) << 2));
1212 break;
1213 }
1214 }
1215 clipmask_odd_index += clipmask_add;
1216 f_odd += stretch_bytes;
1217
1218 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1219 *f_odd++ = y[1];
1220 *f_odd++ = u;
1221 }
1222 else {
1223 y_ = 76284 * (y[1] - 16);
1224
1225 b_ = (y_ + vb) >> 16;
1226 g_ = (y_ + uvg)>> 16;
1227 r_ = (y_ + ur) >> 16;
1228
1229 switch (frame->v4l2_format.format) {
1230 case V4L2_PIX_FMT_RGB565:
1231 g = LIMIT_RGB(g_);
1232 *f_odd++ =
1233 (0x1F & LIMIT_RGB(r_)) |
1234 (0xE0 & (g << 5));
1235 *f_odd++ =
1236 (0x07 & (g >> 3)) |
1237 (0xF8 & LIMIT_RGB(b_));
1238 break;
1239 case V4L2_PIX_FMT_RGB24:
1240 *f_odd++ = LIMIT_RGB(r_);
1241 *f_odd++ = LIMIT_RGB(g_);
1242 *f_odd++ = LIMIT_RGB(b_);
1243 break;
1244 case V4L2_PIX_FMT_RGB32:
1245 *f_odd++ = LIMIT_RGB(r_);
1246 *f_odd++ = LIMIT_RGB(g_);
1247 *f_odd++ = LIMIT_RGB(b_);
1248 f_odd++;
1249 break;
1250 case V4L2_PIX_FMT_RGB555:
1251 g = LIMIT_RGB(g_);
1252 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1253 (0xE0 & (g << 5));
1254 *f_odd++ = (0x03 & (g >> 3)) |
1255 (0x7C & (LIMIT_RGB(b_) << 2));
1256 break;
1257 }
1258 }
1259 clipmask_odd_index += clipmask_add;
1260 f_odd += stretch_bytes;
1261 }
1262
1263 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1264 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1265 * sub_block_size);
1266 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1267 * sub_block_size);
1268 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1269 * sub_block_size);
1270 }
1271
1272 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1273 + block_split * sub_block_size);
1274
1275 frame->curline += 2 * usbvision->stretch_height;
1276 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1277
1278 if (frame->curline >= frame->frmheight)
1279 return ParseState_NextFrame;
1280 else
1281 return ParseState_Continue;
1282 }
1283
1284 /*
1285 * usbvision_parse_data()
1286 *
1287 * Generic routine to parse the scratch buffer. It employs either
1288 * usbvision_find_header() or usbvision_parse_lines() to do most
1289 * of work.
1290 *
1291 */
1292 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1293 {
1294 struct usbvision_frame *frame;
1295 enum ParseState newstate;
1296 long copylen = 0;
1297 unsigned long lock_flags;
1298
1299 frame = usbvision->curFrame;
1300
1301 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1302
1303 while (1) {
1304
1305 newstate = ParseState_Out;
1306 if (scratch_len(usbvision)) {
1307 if (frame->scanstate == ScanState_Scanning) {
1308 newstate = usbvision_find_header(usbvision);
1309 }
1310 else if (frame->scanstate == ScanState_Lines) {
1311 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1312 newstate = usbvision_parse_lines_420(usbvision, &copylen);
1313 }
1314 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1315 newstate = usbvision_parse_lines_422(usbvision, &copylen);
1316 }
1317 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1318 newstate = usbvision_parse_compress(usbvision, &copylen);
1319 }
1320
1321 }
1322 }
1323 if (newstate == ParseState_Continue) {
1324 continue;
1325 }
1326 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1327 break;
1328 }
1329 else {
1330 return; /* ParseState_EndParse */
1331 }
1332 }
1333
1334 if (newstate == ParseState_NextFrame) {
1335 frame->grabstate = FrameState_Done;
1336 do_gettimeofday(&(frame->timestamp));
1337 frame->sequence = usbvision->frame_num;
1338
1339 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1340 list_move_tail(&(frame->frame), &usbvision->outqueue);
1341 usbvision->curFrame = NULL;
1342 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1343
1344 usbvision->frame_num++;
1345
1346 /* This will cause the process to request another frame. */
1347 if (waitqueue_active(&usbvision->wait_frame)) {
1348 PDEBUG(DBG_PARSE, "Wake up !");
1349 wake_up_interruptible(&usbvision->wait_frame);
1350 }
1351 }
1352 else
1353 frame->grabstate = FrameState_Grabbing;
1354
1355
1356 /* Update the frame's uncompressed length. */
1357 frame->scanlength += copylen;
1358 }
1359
1360
1361 /*
1362 * Make all of the blocks of data contiguous
1363 */
1364 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1365 struct urb *urb)
1366 {
1367 unsigned char *packet_data;
1368 int i, totlen = 0;
1369
1370 for (i = 0; i < urb->number_of_packets; i++) {
1371 int packet_len = urb->iso_frame_desc[i].actual_length;
1372 int packet_stat = urb->iso_frame_desc[i].status;
1373
1374 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1375
1376 /* Detect and ignore errored packets */
1377 if (packet_stat) { // packet_stat != 0 ?????????????
1378 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1379 usbvision->isocErrCount++;
1380 continue;
1381 }
1382
1383 /* Detect and ignore empty packets */
1384 if (packet_len < 0) {
1385 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1386 usbvision->isocSkipCount++;
1387 continue;
1388 }
1389 else if (packet_len == 0) { /* Frame end ????? */
1390 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1391 usbvision->isocstate=IsocState_NoFrame;
1392 usbvision->isocSkipCount++;
1393 continue;
1394 }
1395 else if (packet_len > usbvision->isocPacketSize) {
1396 PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1397 usbvision->isocSkipCount++;
1398 continue;
1399 }
1400
1401 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1402
1403 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1404 usbvision->isocstate=IsocState_InFrame;
1405 scratch_mark_header(usbvision);
1406 usbvision_measure_bandwidth(usbvision);
1407 PDEBUG(DBG_ISOC, "packet with header");
1408 }
1409
1410 /*
1411 * If usbvision continues to feed us with data but there is no
1412 * consumption (if, for example, V4L client fell asleep) we
1413 * may overflow the buffer. We have to move old data over to
1414 * free room for new data. This is bad for old data. If we
1415 * just drop new data then it's bad for new data... choose
1416 * your favorite evil here.
1417 */
1418 if (scratch_free(usbvision) < packet_len) {
1419
1420 usbvision->scratch_ovf_count++;
1421 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1422 scratch_len(usbvision), packet_len);
1423 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1424 }
1425
1426 /* Now we know that there is enough room in scratch buffer */
1427 scratch_put(usbvision, packet_data, packet_len);
1428 totlen += packet_len;
1429 usbvision->isocDataCount += packet_len;
1430 usbvision->isocPacketCount++;
1431 }
1432 #if ENABLE_HEXDUMP
1433 if (totlen > 0) {
1434 static int foo;
1435 if (foo < 1) {
1436 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1437 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1438 ++foo;
1439 }
1440 }
1441 #endif
1442 return totlen;
1443 }
1444
1445 static void usbvision_isocIrq(struct urb *urb)
1446 {
1447 int errCode = 0;
1448 int len;
1449 struct usb_usbvision *usbvision = urb->context;
1450 int i;
1451 unsigned long startTime = jiffies;
1452 struct usbvision_frame **f;
1453
1454 /* We don't want to do anything if we are about to be removed! */
1455 if (!USBVISION_IS_OPERATIONAL(usbvision))
1456 return;
1457
1458 /* any urb with wrong status is ignored without acknowledgement */
1459 if (urb->status == -ENOENT) {
1460 return;
1461 }
1462
1463 f = &usbvision->curFrame;
1464
1465 /* Manage streaming interruption */
1466 if (usbvision->streaming == Stream_Interrupt) {
1467 usbvision->streaming = Stream_Idle;
1468 if ((*f)) {
1469 (*f)->grabstate = FrameState_Ready;
1470 (*f)->scanstate = ScanState_Scanning;
1471 }
1472 PDEBUG(DBG_IRQ, "stream interrupted");
1473 wake_up_interruptible(&usbvision->wait_stream);
1474 }
1475
1476 /* Copy the data received into our scratch buffer */
1477 len = usbvision_compress_isochronous(usbvision, urb);
1478
1479 usbvision->isocUrbCount++;
1480 usbvision->urb_length = len;
1481
1482 if (usbvision->streaming == Stream_On) {
1483
1484 /* If we collected enough data let's parse! */
1485 if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) &&
1486 (!list_empty(&(usbvision->inqueue))) ) {
1487 if (!(*f)) {
1488 (*f) = list_entry(usbvision->inqueue.next,
1489 struct usbvision_frame,
1490 frame);
1491 }
1492 usbvision_parse_data(usbvision);
1493 }
1494 else {
1495 /*If we don't have a frame
1496 we're current working on, complain */
1497 PDEBUG(DBG_IRQ,
1498 "received data, but no one needs it");
1499 scratch_reset(usbvision);
1500 }
1501 }
1502 else {
1503 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1504 scratch_reset(usbvision);
1505 }
1506
1507 usbvision->timeInIrq += jiffies - startTime;
1508
1509 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1510 urb->iso_frame_desc[i].status = 0;
1511 urb->iso_frame_desc[i].actual_length = 0;
1512 }
1513
1514 urb->status = 0;
1515 urb->dev = usbvision->dev;
1516 errCode = usb_submit_urb (urb, GFP_ATOMIC);
1517
1518 if(errCode) {
1519 dev_err(&usbvision->dev->dev,
1520 "%s: usb_submit_urb failed: error %d\n",
1521 __func__, errCode);
1522 }
1523
1524 return;
1525 }
1526
1527 /*************************************/
1528 /* Low level usbvision access functions */
1529 /*************************************/
1530
1531 /*
1532 * usbvision_read_reg()
1533 *
1534 * return < 0 -> Error
1535 * >= 0 -> Data
1536 */
1537
1538 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1539 {
1540 int errCode = 0;
1541 unsigned char buffer[1];
1542
1543 if (!USBVISION_IS_OPERATIONAL(usbvision))
1544 return -1;
1545
1546 errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1547 USBVISION_OP_CODE,
1548 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1549 0, (__u16) reg, buffer, 1, HZ);
1550
1551 if (errCode < 0) {
1552 dev_err(&usbvision->dev->dev,
1553 "%s: failed: error %d\n", __func__, errCode);
1554 return errCode;
1555 }
1556 return buffer[0];
1557 }
1558
1559 /*
1560 * usbvision_write_reg()
1561 *
1562 * return 1 -> Reg written
1563 * 0 -> usbvision is not yet ready
1564 * -1 -> Something went wrong
1565 */
1566
1567 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1568 unsigned char value)
1569 {
1570 int errCode = 0;
1571
1572 if (!USBVISION_IS_OPERATIONAL(usbvision))
1573 return 0;
1574
1575 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1576 USBVISION_OP_CODE,
1577 USB_DIR_OUT | USB_TYPE_VENDOR |
1578 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1579
1580 if (errCode < 0) {
1581 dev_err(&usbvision->dev->dev,
1582 "%s: failed: error %d\n", __func__, errCode);
1583 }
1584 return errCode;
1585 }
1586
1587
1588 static void usbvision_ctrlUrb_complete(struct urb *urb)
1589 {
1590 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1591
1592 PDEBUG(DBG_IRQ, "");
1593 usbvision->ctrlUrbBusy = 0;
1594 if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1595 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1596 }
1597 }
1598
1599
1600 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1601 unsigned char *data, int len)
1602 {
1603 int errCode = 0;
1604
1605 PDEBUG(DBG_IRQ, "");
1606 if (len > 8) {
1607 return -EFAULT;
1608 }
1609 if (usbvision->ctrlUrbBusy) {
1610 return -EBUSY;
1611 }
1612 usbvision->ctrlUrbBusy = 1;
1613
1614 usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1615 usbvision->ctrlUrbSetup.bRequest = USBVISION_OP_CODE;
1616 usbvision->ctrlUrbSetup.wValue = 0;
1617 usbvision->ctrlUrbSetup.wIndex = cpu_to_le16(address);
1618 usbvision->ctrlUrbSetup.wLength = cpu_to_le16(len);
1619 usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1620 usb_sndctrlpipe(usbvision->dev, 1),
1621 (unsigned char *)&usbvision->ctrlUrbSetup,
1622 (void *)usbvision->ctrlUrbBuffer, len,
1623 usbvision_ctrlUrb_complete,
1624 (void *)usbvision);
1625
1626 memcpy(usbvision->ctrlUrbBuffer, data, len);
1627
1628 errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1629 if (errCode < 0) {
1630 // error in usb_submit_urb()
1631 usbvision->ctrlUrbBusy = 0;
1632 }
1633 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1634 return errCode;
1635 }
1636
1637
1638 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1639 {
1640 int errCode = 0;
1641
1642 usbvision->lastIsocFrameNum = -1;
1643 usbvision->isocDataCount = 0;
1644 usbvision->isocPacketCount = 0;
1645 usbvision->isocSkipCount = 0;
1646 usbvision->comprLevel = 50;
1647 usbvision->lastComprLevel = -1;
1648 usbvision->isocUrbCount = 0;
1649 usbvision->requestIntra = 1;
1650 usbvision->isocMeasureBandwidthCount = 0;
1651
1652 return errCode;
1653 }
1654
1655 /* this function measures the used bandwidth since last call
1656 * return: 0 : no error
1657 * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1658 */
1659 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1660 {
1661 int errCode = 0;
1662
1663 if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1664 usbvision->isocMeasureBandwidthCount++;
1665 return errCode;
1666 }
1667 if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1668 usbvision->usedBandwidth = usbvision->isocDataCount /
1669 (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1670 100 / usbvision->isocPacketSize;
1671 }
1672 usbvision->isocMeasureBandwidthCount = 0;
1673 usbvision->isocDataCount = 0;
1674 usbvision->isocPacketCount = 0;
1675 usbvision->isocSkipCount = 0;
1676 return errCode;
1677 }
1678
1679 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1680 {
1681 int errCode = 0;
1682 unsigned char buffer[6];
1683
1684 PDEBUG(DBG_IRQ, "");
1685 if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1686 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1687 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1688 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1689 int distorsion;
1690 if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1691 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM Threshold 1
1692 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM Threshold 2
1693 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1694 buffer[2] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (inter)
1695 buffer[3] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (intra)
1696 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1697 buffer[4] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (inter)
1698 buffer[5] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (intra)
1699 }
1700 else { //BRIDGE_NT1003
1701 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM threshold 1
1702 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM threshold 2
1703 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1704 buffer[2] = (unsigned char)(distorsion & 0xFF); // distorsion threshold bit0-7
1705 buffer[3] = 0; //(unsigned char)((distorsion >> 8) & 0x0F); // distorsion threshold bit 8-11
1706 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1707 buffer[4] = (unsigned char)(distorsion & 0xFF); // maximum distorsion bit0-7
1708 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01); // maximum distorsion bit 8
1709 }
1710 errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1711 if (errCode == 0){
1712 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1713 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1714 usbvision->lastComprLevel = usbvision->comprLevel;
1715 }
1716 }
1717 }
1718 return errCode;
1719 }
1720
1721 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1722 {
1723 int errCode = 0;
1724 unsigned char buffer[1];
1725
1726 PDEBUG(DBG_IRQ, "");
1727 usbvision->requestIntra = 1;
1728 buffer[0] = 1;
1729 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1730 return errCode;
1731 }
1732
1733 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1734 {
1735 int errCode = 0;
1736 unsigned char buffer[1];
1737
1738 PDEBUG(DBG_IRQ, "");
1739 usbvision->requestIntra = 0;
1740 buffer[0] = 0;
1741 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1742 return errCode;
1743 }
1744
1745 /*******************************
1746 * usbvision utility functions
1747 *******************************/
1748
1749 int usbvision_power_off(struct usb_usbvision *usbvision)
1750 {
1751 int errCode = 0;
1752
1753 PDEBUG(DBG_FUNC, "");
1754
1755 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1756 if (errCode == 1) {
1757 usbvision->power = 0;
1758 }
1759 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1760 return errCode;
1761 }
1762
1763 /*
1764 * usbvision_set_video_format()
1765 *
1766 */
1767 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1768 {
1769 static const char proc[] = "usbvision_set_video_format";
1770 int rc;
1771 unsigned char value[2];
1772
1773 if (!USBVISION_IS_OPERATIONAL(usbvision))
1774 return 0;
1775
1776 PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1777
1778 if ((format != ISOC_MODE_YUV422)
1779 && (format != ISOC_MODE_YUV420)
1780 && (format != ISOC_MODE_COMPRESS)) {
1781 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1782 format);
1783 format = ISOC_MODE_YUV420;
1784 }
1785 value[0] = 0x0A; //TODO: See the effect of the filter
1786 value[1] = format; // Sets the VO_MODE register which follows FILT_CONT
1787 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1788 USBVISION_OP_CODE,
1789 USB_DIR_OUT | USB_TYPE_VENDOR |
1790 USB_RECIP_ENDPOINT, 0,
1791 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1792
1793 if (rc < 0) {
1794 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1795 "reconnect or reload driver.\n", proc, rc);
1796 }
1797 usbvision->isocMode = format;
1798 return rc;
1799 }
1800
1801 /*
1802 * usbvision_set_output()
1803 *
1804 */
1805
1806 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1807 int height)
1808 {
1809 int errCode = 0;
1810 int UsbWidth, UsbHeight;
1811 unsigned int frameRate=0, frameDrop=0;
1812 unsigned char value[4];
1813
1814 if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1815 return 0;
1816 }
1817
1818 if (width > MAX_USB_WIDTH) {
1819 UsbWidth = width / 2;
1820 usbvision->stretch_width = 2;
1821 }
1822 else {
1823 UsbWidth = width;
1824 usbvision->stretch_width = 1;
1825 }
1826
1827 if (height > MAX_USB_HEIGHT) {
1828 UsbHeight = height / 2;
1829 usbvision->stretch_height = 2;
1830 }
1831 else {
1832 UsbHeight = height;
1833 usbvision->stretch_height = 1;
1834 }
1835
1836 RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1837 UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1838 RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1839 UsbHeight &= ~(1);
1840
1841 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1842 UsbWidth, UsbHeight, width, height,
1843 usbvision->stretch_width, usbvision->stretch_height);
1844
1845 /* I'll not rewrite the same values */
1846 if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1847 value[0] = UsbWidth & 0xff; //LSB
1848 value[1] = (UsbWidth >> 8) & 0x03; //MSB
1849 value[2] = UsbHeight & 0xff; //LSB
1850 value[3] = (UsbHeight >> 8) & 0x03; //MSB
1851
1852 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1853 USBVISION_OP_CODE,
1854 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1855 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1856
1857 if (errCode < 0) {
1858 dev_err(&usbvision->dev->dev,
1859 "%s failed: error %d\n", __func__, errCode);
1860 return errCode;
1861 }
1862 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1863 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1864 }
1865
1866 if (usbvision->isocMode == ISOC_MODE_YUV422) {
1867 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1868 }
1869 else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1870 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1871 }
1872 else {
1873 frameRate = FRAMERATE_MAX;
1874 }
1875
1876 if (usbvision->tvnormId & V4L2_STD_625_50) {
1877 frameDrop = frameRate * 32 / 25 - 1;
1878 }
1879 else if (usbvision->tvnormId & V4L2_STD_525_60) {
1880 frameDrop = frameRate * 32 / 30 - 1;
1881 }
1882
1883 RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1884
1885 PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1886
1887 frameDrop = FRAMERATE_MAX; // We can allow the maximum here, because dropping is controlled
1888
1889 /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1890 => frameSkip = 4;
1891 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1892
1893 frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1894 => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1895 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1896 */
1897 errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1898 return errCode;
1899 }
1900
1901
1902 /*
1903 * usbvision_frames_alloc
1904 * allocate the required frames
1905 */
1906 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1907 {
1908 int i;
1909
1910 /*needs to be page aligned cause the buffers can be mapped individually! */
1911 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
1912 usbvision->curheight *
1913 usbvision->palette.bytes_per_pixel);
1914
1915 /* Try to do my best to allocate the frames the user want in the remaining memory */
1916 usbvision->num_frames = number_of_frames;
1917 while (usbvision->num_frames > 0) {
1918 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1919 if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
1920 break;
1921 }
1922 usbvision->num_frames--;
1923 }
1924
1925 spin_lock_init(&usbvision->queue_lock);
1926 init_waitqueue_head(&usbvision->wait_frame);
1927 init_waitqueue_head(&usbvision->wait_stream);
1928
1929 /* Allocate all buffers */
1930 for (i = 0; i < usbvision->num_frames; i++) {
1931 usbvision->frame[i].index = i;
1932 usbvision->frame[i].grabstate = FrameState_Unused;
1933 usbvision->frame[i].data = usbvision->fbuf +
1934 i * usbvision->max_frame_size;
1935 /*
1936 * Set default sizes for read operation.
1937 */
1938 usbvision->stretch_width = 1;
1939 usbvision->stretch_height = 1;
1940 usbvision->frame[i].width = usbvision->curwidth;
1941 usbvision->frame[i].height = usbvision->curheight;
1942 usbvision->frame[i].bytes_read = 0;
1943 }
1944 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
1945 return usbvision->num_frames;
1946 }
1947
1948 /*
1949 * usbvision_frames_free
1950 * frees memory allocated for the frames
1951 */
1952 void usbvision_frames_free(struct usb_usbvision *usbvision)
1953 {
1954 /* Have to free all that memory */
1955 PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
1956
1957 if (usbvision->fbuf != NULL) {
1958 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1959 usbvision->fbuf = NULL;
1960
1961 usbvision->num_frames = 0;
1962 }
1963 }
1964 /*
1965 * usbvision_empty_framequeues()
1966 * prepare queues for incoming and outgoing frames
1967 */
1968 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1969 {
1970 u32 i;
1971
1972 INIT_LIST_HEAD(&(usbvision->inqueue));
1973 INIT_LIST_HEAD(&(usbvision->outqueue));
1974
1975 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1976 usbvision->frame[i].grabstate = FrameState_Unused;
1977 usbvision->frame[i].bytes_read = 0;
1978 }
1979 }
1980
1981 /*
1982 * usbvision_stream_interrupt()
1983 * stops streaming
1984 */
1985 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1986 {
1987 int ret = 0;
1988
1989 /* stop reading from the device */
1990
1991 usbvision->streaming = Stream_Interrupt;
1992 ret = wait_event_timeout(usbvision->wait_stream,
1993 (usbvision->streaming == Stream_Idle),
1994 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1995 return ret;
1996 }
1997
1998 /*
1999 * usbvision_set_compress_params()
2000 *
2001 */
2002
2003 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
2004 {
2005 static const char proc[] = "usbvision_set_compresion_params: ";
2006 int rc;
2007 unsigned char value[6];
2008
2009 value[0] = 0x0F; // Intra-Compression cycle
2010 value[1] = 0x01; // Reg.45 one line per strip
2011 value[2] = 0x00; // Reg.46 Force intra mode on all new frames
2012 value[3] = 0x00; // Reg.47 FORCE_UP <- 0 normal operation (not force)
2013 value[4] = 0xA2; // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
2014 value[5] = 0x00; // Reg.49 DVI_YUV This has nothing to do with compression
2015
2016 //catched values for NT1004
2017 // value[0] = 0xFF; // Never apply intra mode automatically
2018 // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
2019 // value[2] = 0x01; // Force intra mode on all new frames
2020 // value[3] = 0x00; // Strip size 400 Bytes; do not force up
2021 // value[4] = 0xA2; //
2022 if (!USBVISION_IS_OPERATIONAL(usbvision))
2023 return 0;
2024
2025 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2026 USBVISION_OP_CODE,
2027 USB_DIR_OUT | USB_TYPE_VENDOR |
2028 USB_RECIP_ENDPOINT, 0,
2029 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
2030
2031 if (rc < 0) {
2032 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2033 "reconnect or reload driver.\n", proc, rc);
2034 return rc;
2035 }
2036
2037 if (usbvision->bridgeType == BRIDGE_NT1004) {
2038 value[0] = 20; // PCM Threshold 1
2039 value[1] = 12; // PCM Threshold 2
2040 value[2] = 255; // Distorsion Threshold inter
2041 value[3] = 255; // Distorsion Threshold intra
2042 value[4] = 43; // Max Distorsion inter
2043 value[5] = 43; // Max Distorsion intra
2044 }
2045 else {
2046 value[0] = 20; // PCM Threshold 1
2047 value[1] = 12; // PCM Threshold 2
2048 value[2] = 255; // Distorsion Threshold d7-d0
2049 value[3] = 0; // Distorsion Threshold d11-d8
2050 value[4] = 43; // Max Distorsion d7-d0
2051 value[5] = 0; // Max Distorsion d8
2052 }
2053
2054 if (!USBVISION_IS_OPERATIONAL(usbvision))
2055 return 0;
2056
2057 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2058 USBVISION_OP_CODE,
2059 USB_DIR_OUT | USB_TYPE_VENDOR |
2060 USB_RECIP_ENDPOINT, 0,
2061 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2062
2063 if (rc < 0) {
2064 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2065 "reconnect or reload driver.\n", proc, rc);
2066 return rc;
2067 }
2068
2069
2070 return rc;
2071 }
2072
2073
2074 /*
2075 * usbvision_set_input()
2076 *
2077 * Set the input (saa711x, ...) size x y and other misc input params
2078 * I've no idea if this parameters are right
2079 *
2080 */
2081 int usbvision_set_input(struct usb_usbvision *usbvision)
2082 {
2083 static const char proc[] = "usbvision_set_input: ";
2084 int rc;
2085 unsigned char value[8];
2086 unsigned char dvi_yuv_value;
2087
2088 if (!USBVISION_IS_OPERATIONAL(usbvision))
2089 return 0;
2090
2091 /* Set input format expected from decoder*/
2092 if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) {
2093 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1;
2094 } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2095 /* SAA7113 uses 8 bit output */
2096 value[0] = USBVISION_8_422_SYNC;
2097 } else {
2098 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2099 * as that is how saa7111 is configured */
2100 value[0] = USBVISION_16_422_SYNC;
2101 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2102 }
2103
2104 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2105 if (rc < 0) {
2106 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2107 "reconnect or reload driver.\n", proc, rc);
2108 return rc;
2109 }
2110
2111
2112 if (usbvision->tvnormId & V4L2_STD_PAL) {
2113 value[0] = 0xC0;
2114 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2115 value[2] = 0x20;
2116 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2117 value[4] = 0x60;
2118 value[5] = 0x00; //0x0060 -> 96 Input video h offset
2119 value[6] = 0x16;
2120 value[7] = 0x00; //0x0016 -> 22 Input video v offset
2121 } else if (usbvision->tvnormId & V4L2_STD_SECAM) {
2122 value[0] = 0xC0;
2123 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2124 value[2] = 0x20;
2125 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2126 value[4] = 0x01;
2127 value[5] = 0x00; //0x0001 -> 01 Input video h offset
2128 value[6] = 0x01;
2129 value[7] = 0x00; //0x0001 -> 01 Input video v offset
2130 } else { /* V4L2_STD_NTSC */
2131 value[0] = 0xD0;
2132 value[1] = 0x02; //0x02D0 -> 720 Input video line length
2133 value[2] = 0xF0;
2134 value[3] = 0x00; //0x00F0 -> 240 Input video number of lines
2135 value[4] = 0x50;
2136 value[5] = 0x00; //0x0050 -> 80 Input video h offset
2137 value[6] = 0x10;
2138 value[7] = 0x00; //0x0010 -> 16 Input video v offset
2139 }
2140
2141 if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2142 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2143 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2144 }
2145
2146 if (adjust_X_Offset != -1) {
2147 value[4] = adjust_X_Offset & 0xff;
2148 value[5] = (adjust_X_Offset & 0x0300) >> 8;
2149 }
2150
2151 if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2152 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2153 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2154 }
2155
2156 if (adjust_Y_Offset != -1) {
2157 value[6] = adjust_Y_Offset & 0xff;
2158 value[7] = (adjust_Y_Offset & 0x0300) >> 8;
2159 }
2160
2161 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2162 USBVISION_OP_CODE, /* USBVISION specific code */
2163 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2164 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2165 if (rc < 0) {
2166 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2167 "reconnect or reload driver.\n", proc, rc);
2168 return rc;
2169 }
2170
2171
2172 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2173
2174 if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){
2175 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv;
2176 }
2177 else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2178 /* This changes as the fine sync control changes. Further investigation necessary */
2179 dvi_yuv_value = 0x06;
2180 }
2181
2182 return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2183 }
2184
2185
2186 /*
2187 * usbvision_set_dram_settings()
2188 *
2189 * Set the buffer address needed by the usbvision dram to operate
2190 * This values has been taken with usbsnoop.
2191 *
2192 */
2193
2194 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2195 {
2196 int rc;
2197 unsigned char value[8];
2198
2199 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2200 value[0] = 0x42;
2201 value[1] = 0x71;
2202 value[2] = 0xff;
2203 value[3] = 0x00;
2204 value[4] = 0x98;
2205 value[5] = 0xe0;
2206 value[6] = 0x71;
2207 value[7] = 0xff;
2208 // UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2209 // FDL: 0x00000-0x0E099 = 57498 Words
2210 // VDW: 0x0E3FF-0x3FFFF
2211 }
2212 else {
2213 value[0] = 0x42;
2214 value[1] = 0x00;
2215 value[2] = 0xff;
2216 value[3] = 0x00;
2217 value[4] = 0x00;
2218 value[5] = 0x00;
2219 value[6] = 0x00;
2220 value[7] = 0xff;
2221 }
2222 /* These are the values of the address of the video buffer,
2223 * they have to be loaded into the USBVISION_DRM_PRM1-8
2224 *
2225 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2226 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2227 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2228 * Only used in compressed mode
2229 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2230 * Only used in compressed mode
2231 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2232 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2233 */
2234
2235 if (!USBVISION_IS_OPERATIONAL(usbvision))
2236 return 0;
2237
2238 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2239 USBVISION_OP_CODE, /* USBVISION specific code */
2240 USB_DIR_OUT | USB_TYPE_VENDOR |
2241 USB_RECIP_ENDPOINT, 0,
2242 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2243
2244 if (rc < 0) {
2245 dev_err(&usbvision->dev->dev, "%sERROR=%d\n", __func__, rc);
2246 return rc;
2247 }
2248
2249 /* Restart the video buffer logic */
2250 if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2251 USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2252 return rc;
2253 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2254
2255 return rc;
2256 }
2257
2258 /*
2259 * ()
2260 *
2261 * Power on the device, enables suspend-resume logic
2262 * & reset the isoc End-Point
2263 *
2264 */
2265
2266 int usbvision_power_on(struct usb_usbvision *usbvision)
2267 {
2268 int errCode = 0;
2269
2270 PDEBUG(DBG_FUNC, "");
2271
2272 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2273 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2274 USBVISION_SSPND_EN | USBVISION_RES2);
2275
2276 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2277 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2278 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2279 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2280 if (errCode == 1) {
2281 usbvision->power = 1;
2282 }
2283 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2284 return errCode;
2285 }
2286
2287
2288 /*
2289 * usbvision timer stuff
2290 */
2291
2292 // to call usbvision_power_off from task queue
2293 static void call_usbvision_power_off(struct work_struct *work)
2294 {
2295 struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2296
2297 PDEBUG(DBG_FUNC, "");
2298 if(mutex_lock_interruptible(&usbvision->lock)) {
2299 return;
2300 }
2301
2302
2303 if(usbvision->user == 0) {
2304 usbvision_i2c_unregister(usbvision);
2305
2306 usbvision_power_off(usbvision);
2307 usbvision->initialized = 0;
2308 }
2309 mutex_unlock(&usbvision->lock);
2310 }
2311
2312 static void usbvision_powerOffTimer(unsigned long data)
2313 {
2314 struct usb_usbvision *usbvision = (void *) data;
2315
2316 PDEBUG(DBG_FUNC, "");
2317 del_timer(&usbvision->powerOffTimer);
2318 INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2319 (void) schedule_work(&usbvision->powerOffWork);
2320 }
2321
2322 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2323 {
2324 init_timer(&usbvision->powerOffTimer);
2325 usbvision->powerOffTimer.data = (long) usbvision;
2326 usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2327 }
2328
2329 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2330 {
2331 mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2332 }
2333
2334 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2335 {
2336 if (timer_pending(&usbvision->powerOffTimer)) {
2337 del_timer(&usbvision->powerOffTimer);
2338 }
2339 }
2340
2341 /*
2342 * usbvision_begin_streaming()
2343 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2344 * idea about the rest
2345 */
2346 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2347 {
2348 int errCode = 0;
2349
2350 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2351 usbvision_init_compression(usbvision);
2352 }
2353 errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2354 usbvision->Vin_Reg2_Preset);
2355 return errCode;
2356 }
2357
2358 /*
2359 * usbvision_restart_isoc()
2360 * Not sure yet if touching here PWR_REG make loose the config
2361 */
2362
2363 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2364 {
2365 int ret;
2366
2367 if (
2368 (ret =
2369 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2370 USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2371 return ret;
2372 if (
2373 (ret =
2374 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2375 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2376 USBVISION_RES2)) < 0)
2377 return ret;
2378 if (
2379 (ret =
2380 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2381 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2382 usbvision->Vin_Reg2_Preset)) < 0) return ret;
2383
2384 /* TODO: schedule timeout */
2385 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2386
2387 return 0;
2388 }
2389
2390 int usbvision_audio_off(struct usb_usbvision *usbvision)
2391 {
2392 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2393 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2394 return -1;
2395 }
2396 usbvision->AudioMute = 0;
2397 usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2398 return 0;
2399 }
2400
2401 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2402 {
2403 if (!usbvision->AudioMute) {
2404 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2405 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2406 return -1;
2407 }
2408 }
2409 usbvision->AudioChannel = AudioChannel;
2410 return 0;
2411 }
2412
2413 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2414 {
2415 usbvision_set_video_format(usbvision, format);
2416 usbvision_set_dram_settings(usbvision);
2417 usbvision_set_compress_params(usbvision);
2418 usbvision_set_input(usbvision);
2419 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2420 usbvision_restart_isoc(usbvision);
2421
2422 /* cosas del PCM */
2423 return USBVISION_IS_OPERATIONAL(usbvision);
2424 }
2425
2426 int usbvision_set_alternate(struct usb_usbvision *dev)
2427 {
2428 int errCode, prev_alt = dev->ifaceAlt;
2429 int i;
2430
2431 dev->ifaceAlt=0;
2432 for(i=0;i< dev->num_alt; i++)
2433 if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt])
2434 dev->ifaceAlt=i;
2435
2436 if (dev->ifaceAlt != prev_alt) {
2437 dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt];
2438 PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize);
2439 errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt);
2440 if (errCode < 0) {
2441 dev_err(&dev->dev->dev,
2442 "cannot change alternate number to %d (error=%i)\n",
2443 dev->ifaceAlt, errCode);
2444 return errCode;
2445 }
2446 }
2447
2448 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize);
2449
2450 return 0;
2451 }
2452
2453 /*
2454 * usbvision_init_isoc()
2455 *
2456 */
2457 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2458 {
2459 struct usb_device *dev = usbvision->dev;
2460 int bufIdx, errCode, regValue;
2461 int sb_size;
2462
2463 if (!USBVISION_IS_OPERATIONAL(usbvision))
2464 return -EFAULT;
2465
2466 usbvision->curFrame = NULL;
2467 scratch_reset(usbvision);
2468
2469 /* Alternate interface 1 is is the biggest frame size */
2470 errCode = usbvision_set_alternate(usbvision);
2471 if (errCode < 0) {
2472 usbvision->last_error = errCode;
2473 return -EBUSY;
2474 }
2475 sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2476
2477 regValue = (16 - usbvision_read_reg(usbvision,
2478 USBVISION_ALTER_REG)) & 0x0F;
2479
2480 usbvision->usb_bandwidth = regValue >> 1;
2481 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2482 usbvision->usb_bandwidth);
2483
2484
2485
2486 /* We double buffer the Iso lists */
2487
2488 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2489 int j, k;
2490 struct urb *urb;
2491
2492 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2493 if (urb == NULL) {
2494 dev_err(&usbvision->dev->dev,
2495 "%s: usb_alloc_urb() failed\n", __func__);
2496 return -ENOMEM;
2497 }
2498 usbvision->sbuf[bufIdx].urb = urb;
2499 usbvision->sbuf[bufIdx].data =
2500 usb_buffer_alloc(usbvision->dev,
2501 sb_size,
2502 GFP_KERNEL,
2503 &urb->transfer_dma);
2504 urb->dev = dev;
2505 urb->context = usbvision;
2506 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2507 urb->transfer_flags = URB_ISO_ASAP;
2508 urb->interval = 1;
2509 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2510 urb->complete = usbvision_isocIrq;
2511 urb->number_of_packets = USBVISION_URB_FRAMES;
2512 urb->transfer_buffer_length =
2513 usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2514 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2515 k += usbvision->isocPacketSize) {
2516 urb->iso_frame_desc[j].offset = k;
2517 urb->iso_frame_desc[j].length =
2518 usbvision->isocPacketSize;
2519 }
2520 }
2521
2522 /* Submit all URBs */
2523 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2524 errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb,
2525 GFP_KERNEL);
2526 if (errCode) {
2527 dev_err(&usbvision->dev->dev,
2528 "%s: usb_submit_urb(%d) failed: error %d\n",
2529 __func__, bufIdx, errCode);
2530 }
2531 }
2532
2533 usbvision->streaming = Stream_Idle;
2534 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2535 __func__,
2536 usbvision->video_endp);
2537 return 0;
2538 }
2539
2540 /*
2541 * usbvision_stop_isoc()
2542 *
2543 * This procedure stops streaming and deallocates URBs. Then it
2544 * activates zero-bandwidth alt. setting of the video interface.
2545 *
2546 */
2547 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2548 {
2549 int bufIdx, errCode, regValue;
2550 int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2551
2552 if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2553 return;
2554
2555 /* Unschedule all of the iso td's */
2556 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2557 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2558 if (usbvision->sbuf[bufIdx].data){
2559 usb_buffer_free(usbvision->dev,
2560 sb_size,
2561 usbvision->sbuf[bufIdx].data,
2562 usbvision->sbuf[bufIdx].urb->transfer_dma);
2563 }
2564 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2565 usbvision->sbuf[bufIdx].urb = NULL;
2566 }
2567
2568 PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __func__);
2569 usbvision->streaming = Stream_Off;
2570
2571 if (!usbvision->remove_pending) {
2572
2573 /* Set packet size to 0 */
2574 usbvision->ifaceAlt=0;
2575 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2576 usbvision->ifaceAlt);
2577 if (errCode < 0) {
2578 dev_err(&usbvision->dev->dev,
2579 "%s: usb_set_interface() failed: error %d\n",
2580 __func__, errCode);
2581 usbvision->last_error = errCode;
2582 }
2583 regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2584 usbvision->isocPacketSize =
2585 (regValue == 0) ? 0 : (regValue * 64) - 1;
2586 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2587 usbvision->isocPacketSize);
2588
2589 usbvision->usb_bandwidth = regValue >> 1;
2590 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2591 usbvision->usb_bandwidth);
2592 }
2593 }
2594
2595 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2596 {
2597 /* inputs #0 and #3 are constant for every SAA711x. */
2598 /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2599 int mode[4]= {SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3};
2600 int audio[]= {1, 0, 0, 0};
2601 struct v4l2_routing route;
2602 //channel 0 is TV with audiochannel 1 (tuner mono)
2603 //channel 1 is Composite with audio channel 0 (line in)
2604 //channel 2 is S-Video with audio channel 0 (line in)
2605 //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2606
2607 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2608 usbvision->ctl_input = channel;
2609
2610 // set the new channel
2611 // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2612 // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2613
2614 switch (usbvision_device_data[usbvision->DevModel].Codec) {
2615 case CODEC_SAA7113:
2616 mode[1] = SAA7115_COMPOSITE2;
2617 if (SwitchSVideoInput) {
2618 /* To handle problems with S-Video Input for
2619 * some devices. Use SwitchSVideoInput
2620 * parameter when loading the module.*/
2621 mode[2] = SAA7115_COMPOSITE1;
2622 }
2623 else {
2624 mode[2] = SAA7115_SVIDEO1;
2625 }
2626 break;
2627 case CODEC_SAA7111:
2628 default:
2629 /* modes for saa7111 */
2630 mode[1] = SAA7115_COMPOSITE1;
2631 mode[2] = SAA7115_SVIDEO1;
2632 break;
2633 }
2634 route.input = mode[channel];
2635 route.output = 0;
2636 call_all(usbvision, video, s_routing, &route);
2637 usbvision_set_audio(usbvision, audio[channel]);
2638 return 0;
2639 }
2640
2641 /*
2642 * Overrides for Emacs so that we follow Linus's tabbing style.
2643 * ---------------------------------------------------------------------------
2644 * Local variables:
2645 * c-basic-offset: 8
2646 * End:
2647 */
Linux kernel - Deliverables
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