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V4L/DVB (5517): Usbvision: store the device database more efficiently
[linux-2.6/mini2440.git] / drivers / media / video / usbvision / usbvision-core.c
blobfee4548a9cc753ffedd572318c43ab8617b8dbec
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/smp_lock.h>
34 #include <linux/videodev.h>
35 #include <linux/vmalloc.h>
36 #include <linux/module.h>
37 #include <linux/init.h>
38 #include <linux/spinlock.h>
39 #include <asm/io.h>
40 #include <linux/videodev2.h>
41 #include <linux/video_decoder.h>
42 #include <linux/i2c.h>
43
44 #include <media/saa7115.h>
45 #include <media/v4l2-common.h>
46 #include <media/tuner.h>
47 #include <media/audiochip.h>
48
49 #include <linux/moduleparam.h>
50 #include <linux/workqueue.h>
51
52 #ifdef CONFIG_KMOD
53 #include <linux/kmod.h>
54 #endif
55
56 #include "usbvision.h"
57
58 static unsigned int core_debug = 0;
59 module_param(core_debug,int,0644);
60 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
61
62 static unsigned int force_testpattern = 0;
63 module_param(force_testpattern,int,0644);
64 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
65
66 static int adjustCompression = 1; // Set the compression to be adaptive
67 module_param(adjustCompression, int, 0444);
68 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device. Default: 1 (On)");
69
70 static int SwitchSVideoInput = 0; // To help people with Black and White output with using s-video input. Some cables and input device are wired differently.
71 module_param(SwitchSVideoInput, int, 0444);
72 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)");
73
74 #define ENABLE_HEXDUMP 0 /* Enable if you need it */
75
76
77 #ifdef USBVISION_DEBUG
78 #define PDEBUG(level, fmt, args...) \
79 if (core_debug & (level)) info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args)
80 #else
81 #define PDEBUG(level, fmt, args...) do {} while(0)
82 #endif
83
84 #define DBG_HEADER 1<<0
85 #define DBG_IRQ 1<<1
86 #define DBG_ISOC 1<<2
87 #define DBG_PARSE 1<<3
88 #define DBG_SCRATCH 1<<4
89 #define DBG_FUNC 1<<5
90
91 static const int max_imgwidth = MAX_FRAME_WIDTH;
92 static const int max_imgheight = MAX_FRAME_HEIGHT;
93 static const int min_imgwidth = MIN_FRAME_WIDTH;
94 static const int min_imgheight = MIN_FRAME_HEIGHT;
95
96 /* The value of 'scratch_buf_size' affects quality of the picture
97 * in many ways. Shorter buffers may cause loss of data when client
98 * is too slow. Larger buffers are memory-consuming and take longer
99 * to work with. This setting can be adjusted, but the default value
100 * should be OK for most desktop users.
101 */
102 #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) // 128kB memory scratch buffer
103 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
104
105 // Function prototypes
106 static int usbvision_request_intra (struct usb_usbvision *usbvision);
107 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
108 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
109 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
110
111 /*******************************/
112 /* Memory management functions */
113 /*******************************/
114
115 /*
116 * Here we want the physical address of the memory.
117 * This is used when initializing the contents of the area.
118 */
119
120 static void *usbvision_rvmalloc(unsigned long size)
121 {
122 void *mem;
123 unsigned long adr;
124
125 size = PAGE_ALIGN(size);
126 mem = vmalloc_32(size);
127 if (!mem)
128 return NULL;
129
130 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
131 adr = (unsigned long) mem;
132 while (size > 0) {
133 SetPageReserved(vmalloc_to_page((void *)adr));
134 adr += PAGE_SIZE;
135 size -= PAGE_SIZE;
136 }
137
138 return mem;
139 }
140
141 static void usbvision_rvfree(void *mem, unsigned long size)
142 {
143 unsigned long adr;
144
145 if (!mem)
146 return;
147
148 size = PAGE_ALIGN(size);
149
150 adr = (unsigned long) mem;
151 while ((long) size > 0) {
152 ClearPageReserved(vmalloc_to_page((void *)adr));
153 adr += PAGE_SIZE;
154 size -= PAGE_SIZE;
155 }
156
157 vfree(mem);
158 }
159
160
161
162 #if ENABLE_HEXDUMP
163 static void usbvision_hexdump(const unsigned char *data, int len)
164 {
165 char tmp[80];
166 int i, k;
167
168 for (i = k = 0; len > 0; i++, len--) {
169 if (i > 0 && (i % 16 == 0)) {
170 printk("%s\n", tmp);
171 k = 0;
172 }
173 k += sprintf(&tmp[k], "%02x ", data[i]);
174 }
175 if (k > 0)
176 printk("%s\n", tmp);
177 }
178 #endif
179
180 /********************************
181 * scratch ring buffer handling
182 ********************************/
183 static int scratch_len(struct usb_usbvision *usbvision) /*This returns the amount of data actually in the buffer */
184 {
185 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
186 if (len < 0) {
187 len += scratch_buf_size;
188 }
189 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
190
191 return len;
192 }
193
194
195 /* This returns the free space left in the buffer */
196 static int scratch_free(struct usb_usbvision *usbvision)
197 {
198 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
199 if (free <= 0) {
200 free += scratch_buf_size;
201 }
202 if (free) {
203 free -= 1; /* at least one byte in the buffer must */
204 /* left blank, otherwise there is no chance to differ between full and empty */
205 }
206 PDEBUG(DBG_SCRATCH, "return %d\n", free);
207
208 return free;
209 }
210
211
212 /* This puts data into the buffer */
213 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
214 int len)
215 {
216 int len_part;
217
218 if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
219 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
220 usbvision->scratch_write_ptr += len;
221 }
222 else {
223 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
224 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
225 if (len == len_part) {
226 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */
227 }
228 else {
229 memcpy(usbvision->scratch, data + len_part, len - len_part);
230 usbvision->scratch_write_ptr = len - len_part;
231 }
232 }
233
234 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
235
236 return len;
237 }
238
239 /* This marks the write_ptr as position of new frame header */
240 static void scratch_mark_header(struct usb_usbvision *usbvision)
241 {
242 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
243
244 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
245 usbvision->scratch_write_ptr;
246 usbvision->scratch_headermarker_write_ptr += 1;
247 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
248 }
249
250 /* This gets data from the buffer at the given "ptr" position */
251 static int scratch_get_extra(struct usb_usbvision *usbvision,
252 unsigned char *data, int *ptr, int len)
253 {
254 int len_part;
255 if (*ptr + len < scratch_buf_size) {
256 memcpy(data, usbvision->scratch + *ptr, len);
257 *ptr += len;
258 }
259 else {
260 len_part = scratch_buf_size - *ptr;
261 memcpy(data, usbvision->scratch + *ptr, len_part);
262 if (len == len_part) {
263 *ptr = 0; /* just set the y_ptr to zero */
264 }
265 else {
266 memcpy(data + len_part, usbvision->scratch, len - len_part);
267 *ptr = len - len_part;
268 }
269 }
270
271 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
272
273 return len;
274 }
275
276
277 /* This sets the scratch extra read pointer */
278 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
279 int len)
280 {
281 *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
282
283 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
284 }
285
286
287 /*This increments the scratch extra read pointer */
288 static void scratch_inc_extra_ptr(int *ptr, int len)
289 {
290 *ptr = (*ptr + len) % scratch_buf_size;
291
292 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
293 }
294
295
296 /* This gets data from the buffer */
297 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
298 int len)
299 {
300 int len_part;
301 if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
302 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
303 usbvision->scratch_read_ptr += len;
304 }
305 else {
306 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
307 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
308 if (len == len_part) {
309 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */
310 }
311 else {
312 memcpy(data + len_part, usbvision->scratch, len - len_part);
313 usbvision->scratch_read_ptr = len - len_part;
314 }
315 }
316
317 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
318
319 return len;
320 }
321
322
323 /* This sets read pointer to next header and returns it */
324 static int scratch_get_header(struct usb_usbvision *usbvision,
325 struct usbvision_frame_header *header)
326 {
327 int errCode = 0;
328
329 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
330
331 while (usbvision->scratch_headermarker_write_ptr -
332 usbvision->scratch_headermarker_read_ptr != 0) {
333 usbvision->scratch_read_ptr =
334 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
335 usbvision->scratch_headermarker_read_ptr += 1;
336 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
337 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
338 if ((header->magic_1 == USBVISION_MAGIC_1)
339 && (header->magic_2 == USBVISION_MAGIC_2)
340 && (header->headerLength == USBVISION_HEADER_LENGTH)) {
341 errCode = USBVISION_HEADER_LENGTH;
342 header->frameWidth = header->frameWidthLo + (header->frameWidthHi << 8);
343 header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
344 break;
345 }
346 }
347
348 return errCode;
349 }
350
351
352 /*This removes len bytes of old data from the buffer */
353 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
354 {
355
356 usbvision->scratch_read_ptr += len;
357 usbvision->scratch_read_ptr %= scratch_buf_size;
358 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
359 }
360
361
362 /*This resets the buffer - kills all data in it too */
363 static void scratch_reset(struct usb_usbvision *usbvision)
364 {
365 PDEBUG(DBG_SCRATCH, "\n");
366
367 usbvision->scratch_read_ptr = 0;
368 usbvision->scratch_write_ptr = 0;
369 usbvision->scratch_headermarker_read_ptr = 0;
370 usbvision->scratch_headermarker_write_ptr = 0;
371 usbvision->isocstate = IsocState_NoFrame;
372 }
373
374 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
375 {
376 usbvision->scratch = vmalloc_32(scratch_buf_size);
377 scratch_reset(usbvision);
378 if(usbvision->scratch == NULL) {
379 err("%s: unable to allocate %d bytes for scratch",
380 __FUNCTION__, scratch_buf_size);
381 return -ENOMEM;
382 }
383 return 0;
384 }
385
386 void usbvision_scratch_free(struct usb_usbvision *usbvision)
387 {
388 if (usbvision->scratch != NULL) {
389 vfree(usbvision->scratch);
390 usbvision->scratch = NULL;
391 }
392 }
393
394 /*
395 * usbvision_testpattern()
396 *
397 * Procedure forms a test pattern (yellow grid on blue background).
398 *
399 * Parameters:
400 * fullframe: if TRUE then entire frame is filled, otherwise the procedure
401 * continues from the current scanline.
402 * pmode 0: fill the frame with solid blue color (like on VCR or TV)
403 * 1: Draw a colored grid
404 *
405 */
406 static void usbvision_testpattern(struct usb_usbvision *usbvision,
407 int fullframe, int pmode)
408 {
409 static const char proc[] = "usbvision_testpattern";
410 struct usbvision_frame *frame;
411 unsigned char *f;
412 int num_cell = 0;
413 int scan_length = 0;
414 static int num_pass = 0;
415
416 if (usbvision == NULL) {
417 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
418 return;
419 }
420 if (usbvision->curFrame == NULL) {
421 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
422 return;
423 }
424
425 /* Grab the current frame */
426 frame = usbvision->curFrame;
427
428 /* Optionally start at the beginning */
429 if (fullframe) {
430 frame->curline = 0;
431 frame->scanlength = 0;
432 }
433
434 /* Form every scan line */
435 for (; frame->curline < frame->frmheight; frame->curline++) {
436 int i;
437
438 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
439 for (i = 0; i < usbvision->curwidth; i++) {
440 unsigned char cb = 0x80;
441 unsigned char cg = 0;
442 unsigned char cr = 0;
443
444 if (pmode == 1) {
445 if (frame->curline % 32 == 0)
446 cb = 0, cg = cr = 0xFF;
447 else if (i % 32 == 0) {
448 if (frame->curline % 32 == 1)
449 num_cell++;
450 cb = 0, cg = cr = 0xFF;
451 } else {
452 cb =
453 ((num_cell * 7) +
454 num_pass) & 0xFF;
455 cg =
456 ((num_cell * 5) +
457 num_pass * 2) & 0xFF;
458 cr =
459 ((num_cell * 3) +
460 num_pass * 3) & 0xFF;
461 }
462 } else {
463 /* Just the blue screen */
464 }
465
466 *f++ = cb;
467 *f++ = cg;
468 *f++ = cr;
469 scan_length += 3;
470 }
471 }
472
473 frame->grabstate = FrameState_Done;
474 frame->scanlength += scan_length;
475 ++num_pass;
476
477 }
478
479 /*
480 * usbvision_decompress_alloc()
481 *
482 * allocates intermediate buffer for decompression
483 */
484 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
485 {
486 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
487 usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
488 if (usbvision->IntraFrameBuffer == NULL) {
489 err("%s: unable to allocate %d for compr. frame buffer", __FUNCTION__, IFB_size);
490 return -ENOMEM;
491 }
492 return 0;
493 }
494
495 /*
496 * usbvision_decompress_free()
497 *
498 * frees intermediate buffer for decompression
499 */
500 void usbvision_decompress_free(struct usb_usbvision *usbvision)
501 {
502 if (usbvision->IntraFrameBuffer != NULL) {
503 vfree(usbvision->IntraFrameBuffer);
504 usbvision->IntraFrameBuffer = NULL;
505 }
506 }
507
508 /************************************************************
509 * Here comes the data parsing stuff that is run as interrupt
510 ************************************************************/
511 /*
512 * usbvision_find_header()
513 *
514 * Locate one of supported header markers in the scratch buffer.
515 */
516 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
517 {
518 struct usbvision_frame *frame;
519 int foundHeader = 0;
520
521 frame = usbvision->curFrame;
522
523 while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
524 // found header in scratch
525 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
526 frame->isocHeader.magic_2,
527 frame->isocHeader.magic_1,
528 frame->isocHeader.headerLength,
529 frame->isocHeader.frameNum,
530 frame->isocHeader.framePhase,
531 frame->isocHeader.frameLatency,
532 frame->isocHeader.dataFormat,
533 frame->isocHeader.formatParam,
534 frame->isocHeader.frameWidth,
535 frame->isocHeader.frameHeight);
536
537 if (usbvision->requestIntra) {
538 if (frame->isocHeader.formatParam & 0x80) {
539 foundHeader = 1;
540 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
541 usbvision_unrequest_intra(usbvision);
542 break;
543 }
544 }
545 else {
546 foundHeader = 1;
547 break;
548 }
549 }
550
551 if (foundHeader) {
552 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
553 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
554 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
555 }
556 else { // no header found
557 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
558 scratch_reset(usbvision);
559 return ParseState_EndParse;
560 }
561
562 // found header
563 if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
564 //check isocHeader.frameNum for lost frames
565 if (usbvision->lastIsocFrameNum >= 0) {
566 if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
567 // unexpected frame drop: need to request new intra frame
568 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
569 usbvision_request_intra(usbvision);
570 return ParseState_NextFrame;
571 }
572 }
573 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
574 }
575 usbvision->header_count++;
576 frame->scanstate = ScanState_Lines;
577 frame->curline = 0;
578
579 if (force_testpattern) {
580 usbvision_testpattern(usbvision, 1, 1);
581 return ParseState_NextFrame;
582 }
583 return ParseState_Continue;
584 }
585
586 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
587 long *pcopylen)
588 {
589 volatile struct usbvision_frame *frame;
590 unsigned char *f;
591 int len;
592 int i;
593 unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
594 unsigned char rv, gv, bv; // RGB components
595 int clipmask_index, bytes_per_pixel;
596 int stretch_bytes, clipmask_add;
597
598 frame = usbvision->curFrame;
599 f = frame->data + (frame->v4l2_linesize * frame->curline);
600
601 /* Make sure there's enough data for the entire line */
602 len = (frame->isocHeader.frameWidth * 2)+5;
603 if (scratch_len(usbvision) < len) {
604 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
605 return ParseState_Out;
606 }
607
608 if ((frame->curline + 1) >= frame->frmheight) {
609 return ParseState_NextFrame;
610 }
611
612 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
613 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
614 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
615 clipmask_add = usbvision->stretch_width;
616
617 for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
618
619 scratch_get(usbvision, &yuyv[0], 4);
620
621 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
622 *f++ = yuyv[0]; // Y
623 *f++ = yuyv[3]; // U
624 }
625 else {
626
627 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
628 switch (frame->v4l2_format.format) {
629 case V4L2_PIX_FMT_RGB565:
630 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
631 *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv);
632 break;
633 case V4L2_PIX_FMT_RGB24:
634 *f++ = bv;
635 *f++ = gv;
636 *f++ = rv;
637 break;
638 case V4L2_PIX_FMT_RGB32:
639 *f++ = bv;
640 *f++ = gv;
641 *f++ = rv;
642 f++;
643 break;
644 case V4L2_PIX_FMT_RGB555:
645 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
646 *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
647 break;
648 }
649 }
650 clipmask_index += clipmask_add;
651 f += stretch_bytes;
652
653 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
654 *f++ = yuyv[2]; // Y
655 *f++ = yuyv[1]; // V
656 }
657 else {
658
659 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
660 switch (frame->v4l2_format.format) {
661 case V4L2_PIX_FMT_RGB565:
662 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
663 *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv);
664 break;
665 case V4L2_PIX_FMT_RGB24:
666 *f++ = bv;
667 *f++ = gv;
668 *f++ = rv;
669 break;
670 case V4L2_PIX_FMT_RGB32:
671 *f++ = bv;
672 *f++ = gv;
673 *f++ = rv;
674 f++;
675 break;
676 case V4L2_PIX_FMT_RGB555:
677 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
678 *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
679 break;
680 }
681 }
682 clipmask_index += clipmask_add;
683 f += stretch_bytes;
684 }
685
686 frame->curline += usbvision->stretch_height;
687 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
688
689 if (frame->curline >= frame->frmheight) {
690 return ParseState_NextFrame;
691 }
692 else {
693 return ParseState_Continue;
694 }
695 }
696
697 /* The decompression routine */
698 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
699 unsigned char *Decompressed, int *StartPos,
700 int *BlockTypeStartPos, int Len)
701 {
702 int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
703 unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
704
705 Integrator = 0;
706 Pos = *StartPos;
707 BlockTypePos = *BlockTypeStartPos;
708 MaxPos = 396; //Pos + Len;
709 ExtraPos = Pos;
710 BlockLen = 0;
711 BlockByte = 0;
712 BlockCode = 0;
713 BlockType = 0;
714 BlockTypeByte = 0;
715 BlockTypeLen = 0;
716 RestPixel = Len;
717
718 for (Idx = 0; Idx < Len; Idx++) {
719
720 if (BlockLen == 0) {
721 if (BlockTypeLen==0) {
722 BlockTypeByte = Compressed[BlockTypePos];
723 BlockTypePos++;
724 BlockTypeLen = 4;
725 }
726 BlockType = (BlockTypeByte & 0xC0) >> 6;
727
728 //statistic:
729 usbvision->ComprBlockTypes[BlockType]++;
730
731 Pos = ExtraPos;
732 if (BlockType == 0) {
733 if(RestPixel >= 24) {
734 Idx += 23;
735 RestPixel -= 24;
736 Integrator = Decompressed[Idx];
737 } else {
738 Idx += RestPixel - 1;
739 RestPixel = 0;
740 }
741 } else {
742 BlockCode = Compressed[Pos];
743 Pos++;
744 if (RestPixel >= 24) {
745 BlockLen = 24;
746 } else {
747 BlockLen = RestPixel;
748 }
749 RestPixel -= BlockLen;
750 ExtraPos = Pos + (BlockLen / 4);
751 }
752 BlockTypeByte <<= 2;
753 BlockTypeLen -= 1;
754 }
755 if (BlockLen > 0) {
756 if ((BlockLen%4) == 0) {
757 BlockByte = Compressed[Pos];
758 Pos++;
759 }
760 if (BlockType == 1) { //inter Block
761 Integrator = Decompressed[Idx];
762 }
763 switch (BlockByte & 0xC0) {
764 case 0x03<<6:
765 Integrator += Compressed[ExtraPos];
766 ExtraPos++;
767 break;
768 case 0x02<<6:
769 Integrator += BlockCode;
770 break;
771 case 0x00:
772 Integrator -= BlockCode;
773 break;
774 }
775 Decompressed[Idx] = Integrator;
776 BlockByte <<= 2;
777 BlockLen -= 1;
778 }
779 }
780 *StartPos = ExtraPos;
781 *BlockTypeStartPos = BlockTypePos;
782 return Idx;
783 }
784
785
786 /*
787 * usbvision_parse_compress()
788 *
789 * Parse compressed frame from the scratch buffer, put
790 * decoded RGB value into the current frame buffer and add the written
791 * number of bytes (RGB) to the *pcopylen.
792 *
793 */
794 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
795 long *pcopylen)
796 {
797 #define USBVISION_STRIP_MAGIC 0x5A
798 #define USBVISION_STRIP_LEN_MAX 400
799 #define USBVISION_STRIP_HEADER_LEN 3
800
801 struct usbvision_frame *frame;
802 unsigned char *f,*u = NULL ,*v = NULL;
803 unsigned char StripData[USBVISION_STRIP_LEN_MAX];
804 unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
805 int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
806 int clipmask_index, bytes_per_pixel, rc;
807 int imageSize;
808 unsigned char rv, gv, bv;
809 static unsigned char *Y, *U, *V;
810
811 frame = usbvision->curFrame;
812 imageSize = frame->frmwidth * frame->frmheight;
813 if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
814 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) { // this is a planar format
815 //... v4l2_linesize not used here.
816 f = frame->data + (frame->width * frame->curline);
817 } else
818 f = frame->data + (frame->v4l2_linesize * frame->curline);
819
820 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
821 // get base of u and b planes add halfoffset
822
823 u = frame->data
824 + imageSize
825 + (frame->frmwidth >>1) * frame->curline ;
826 v = u + (imageSize >>1 );
827
828 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
829
830 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
831 u = v + (imageSize >>2) ;
832 }
833
834 if (frame->curline == 0) {
835 usbvision_adjust_compression(usbvision);
836 }
837
838 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
839 return ParseState_Out;
840 }
841
842 //get strip header without changing the scratch_read_ptr
843 scratch_set_extra_ptr(usbvision, &StripPtr, 0);
844 scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
845 USBVISION_STRIP_HEADER_LEN);
846
847 if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
848 // wrong strip magic
849 usbvision->stripMagicErrors++;
850 return ParseState_NextFrame;
851 }
852
853 if (frame->curline != (int)StripHeader[2]) {
854 //line number missmatch error
855 usbvision->stripLineNumberErrors++;
856 }
857
858 StripLen = 2 * (unsigned int)StripHeader[1];
859 if (StripLen > USBVISION_STRIP_LEN_MAX) {
860 // strip overrun
861 // I think this never happens
862 usbvision_request_intra(usbvision);
863 }
864
865 if (scratch_len(usbvision) < StripLen) {
866 //there is not enough data for the strip
867 return ParseState_Out;
868 }
869
870 if (usbvision->IntraFrameBuffer) {
871 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
872 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
873 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
874 }
875 else {
876 return ParseState_NextFrame;
877 }
878
879 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
880 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
881
882 scratch_get(usbvision, StripData, StripLen);
883
884 IdxEnd = frame->frmwidth;
885 BlockTypePos = USBVISION_STRIP_HEADER_LEN;
886 StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
887 BlockPos = StartBlockPos;
888
889 usbvision->BlockPos = BlockPos;
890
891 if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
892 //return ParseState_Continue;
893 }
894 if (StripLen > usbvision->maxStripLen) {
895 usbvision->maxStripLen = StripLen;
896 }
897
898 if (frame->curline%2) {
899 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
900 //return ParseState_Continue;
901 }
902 }
903 else {
904 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
905 //return ParseState_Continue;
906 }
907 }
908
909 if (BlockPos > usbvision->comprBlockPos) {
910 usbvision->comprBlockPos = BlockPos;
911 }
912 if (BlockPos > StripLen) {
913 usbvision->stripLenErrors++;
914 }
915
916 for (Idx = 0; Idx < IdxEnd; Idx++) {
917 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
918 *f++ = Y[Idx];
919 *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
920 }
921 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
922 *f++ = Y[Idx];
923 if ( Idx & 0x01)
924 *u++ = U[Idx>>1] ;
925 else
926 *v++ = V[Idx>>1];
927 }
928 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
929 *f++ = Y [Idx];
930 if ( !(( Idx & 0x01 ) | ( frame->curline & 0x01 )) ){
931
932 /* only need do this for 1 in 4 pixels */
933 /* intraframe buffer is YUV420 format */
934
935 *u++ = U[Idx >>1];
936 *v++ = V[Idx >>1];
937 }
938
939 }
940 else {
941 YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
942 switch (frame->v4l2_format.format) {
943 case V4L2_PIX_FMT_GREY:
944 *f++ = Y[Idx];
945 break;
946 case V4L2_PIX_FMT_RGB555:
947 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2));
948 *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1));
949 break;
950 case V4L2_PIX_FMT_RGB565:
951 *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3));
952 *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv);
953 break;
954 case V4L2_PIX_FMT_RGB24:
955 *f++ = bv;
956 *f++ = gv;
957 *f++ = rv;
958 break;
959 case V4L2_PIX_FMT_RGB32:
960 *f++ = bv;
961 *f++ = gv;
962 *f++ = rv;
963 f++;
964 break;
965 }
966 }
967 clipmask_index++;
968 }
969 /* Deal with non-integer no. of bytes for YUV420P */
970 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
971 *pcopylen += frame->v4l2_linesize;
972 else
973 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
974
975 frame->curline += 1;
976
977 if (frame->curline >= frame->frmheight) {
978 return ParseState_NextFrame;
979 }
980 else {
981 return ParseState_Continue;
982 }
983
984 }
985
986
987 /*
988 * usbvision_parse_lines_420()
989 *
990 * Parse two lines from the scratch buffer, put
991 * decoded RGB value into the current frame buffer and add the written
992 * number of bytes (RGB) to the *pcopylen.
993 *
994 */
995 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
996 long *pcopylen)
997 {
998 struct usbvision_frame *frame;
999 unsigned char *f_even = NULL, *f_odd = NULL;
1000 unsigned int pixel_per_line, block;
1001 int pixel, block_split;
1002 int y_ptr, u_ptr, v_ptr, y_odd_offset;
1003 const int y_block_size = 128;
1004 const int uv_block_size = 64;
1005 const int sub_block_size = 32;
1006 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
1007 const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1008 unsigned char y[2], u, v; /* YUV components */
1009 int y_, u_, v_, vb, uvg, ur;
1010 int r_, g_, b_; /* RGB components */
1011 unsigned char g;
1012 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1013 int clipmask_add, stretch_bytes;
1014
1015 frame = usbvision->curFrame;
1016 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1017 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1018
1019 /* Make sure there's enough data for the entire line */
1020 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1021 /* I need two lines to decode the color */
1022 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1023 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1024 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1025 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
1026 clipmask_add = usbvision->stretch_width;
1027 pixel_per_line = frame->isocHeader.frameWidth;
1028
1029 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1030 //printk(KERN_DEBUG "out of data, need %d\n", len);
1031 return ParseState_Out;
1032 }
1033
1034 if ((frame->curline + 1) >= frame->frmheight) {
1035 return ParseState_NextFrame;
1036 }
1037
1038 block_split = (pixel_per_line%y_block_size) ? 1 : 0; //are some blocks splitted into different lines?
1039
1040 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1041 + block_split * uv_block_size;
1042
1043 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1044 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1045 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1046 + (4 - block_split) * sub_block_size);
1047
1048 for (block = 0; block < (pixel_per_line / sub_block_size);
1049 block++) {
1050
1051
1052 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1053 scratch_get(usbvision, &y[0], 2);
1054 scratch_get_extra(usbvision, &u, &u_ptr, 1);
1055 scratch_get_extra(usbvision, &v, &v_ptr, 1);
1056
1057 //I don't use the YUV_TO_RGB macro for better performance
1058 v_ = v - 128;
1059 u_ = u - 128;
1060 vb = 132252 * v_;
1061 uvg= -53281 * u_ - 25625 * v_;
1062 ur = 104595 * u_;
1063
1064 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1065 *f_even++ = y[0];
1066 *f_even++ = v;
1067 }
1068 else {
1069 y_ = 76284 * (y[0] - 16);
1070
1071 b_ = (y_ + vb) >> 16;
1072 g_ = (y_ + uvg)>> 16;
1073 r_ = (y_ + ur) >> 16;
1074
1075 switch (frame->v4l2_format.format) {
1076 case V4L2_PIX_FMT_RGB565:
1077 g = LIMIT_RGB(g_);
1078 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1079 *f_even++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1080 break;
1081 case V4L2_PIX_FMT_RGB24:
1082 *f_even++ = LIMIT_RGB(b_);
1083 *f_even++ = LIMIT_RGB(g_);
1084 *f_even++ = LIMIT_RGB(r_);
1085 break;
1086 case V4L2_PIX_FMT_RGB32:
1087 *f_even++ = LIMIT_RGB(b_);
1088 *f_even++ = LIMIT_RGB(g_);
1089 *f_even++ = LIMIT_RGB(r_);
1090 f_even++;
1091 break;
1092 case V4L2_PIX_FMT_RGB555:
1093 g = LIMIT_RGB(g_);
1094 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1095 *f_even++ = (0x03 & ( g >> 6)) |
1096 (0x7C & (LIMIT_RGB(r_) >> 1));
1097 break;
1098 }
1099 }
1100 clipmask_even_index += clipmask_add;
1101 f_even += stretch_bytes;
1102
1103 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1104 *f_even++ = y[1];
1105 *f_even++ = u;
1106 }
1107 else {
1108 y_ = 76284 * (y[1] - 16);
1109
1110 b_ = (y_ + vb) >> 16;
1111 g_ = (y_ + uvg)>> 16;
1112 r_ = (y_ + ur) >> 16;
1113
1114 switch (frame->v4l2_format.format) {
1115 case V4L2_PIX_FMT_RGB565:
1116 g = LIMIT_RGB(g_);
1117 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1118 *f_even++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1119 break;
1120 case V4L2_PIX_FMT_RGB24:
1121 *f_even++ = LIMIT_RGB(b_);
1122 *f_even++ = LIMIT_RGB(g_);
1123 *f_even++ = LIMIT_RGB(r_);
1124 break;
1125 case V4L2_PIX_FMT_RGB32:
1126 *f_even++ = LIMIT_RGB(b_);
1127 *f_even++ = LIMIT_RGB(g_);
1128 *f_even++ = LIMIT_RGB(r_);
1129 f_even++;
1130 break;
1131 case V4L2_PIX_FMT_RGB555:
1132 g = LIMIT_RGB(g_);
1133 *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1134 *f_even++ = (0x03 & ( g >> 6)) |
1135 (0x7C & (LIMIT_RGB(r_) >> 1));
1136 break;
1137 }
1138 }
1139 clipmask_even_index += clipmask_add;
1140 f_even += stretch_bytes;
1141
1142 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1143
1144 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1145 *f_odd++ = y[0];
1146 *f_odd++ = v;
1147 }
1148 else {
1149 y_ = 76284 * (y[0] - 16);
1150
1151 b_ = (y_ + vb) >> 16;
1152 g_ = (y_ + uvg)>> 16;
1153 r_ = (y_ + ur) >> 16;
1154
1155 switch (frame->v4l2_format.format) {
1156 case V4L2_PIX_FMT_RGB565:
1157 g = LIMIT_RGB(g_);
1158 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1159 *f_odd++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1160 break;
1161 case V4L2_PIX_FMT_RGB24:
1162 *f_odd++ = LIMIT_RGB(b_);
1163 *f_odd++ = LIMIT_RGB(g_);
1164 *f_odd++ = LIMIT_RGB(r_);
1165 break;
1166 case V4L2_PIX_FMT_RGB32:
1167 *f_odd++ = LIMIT_RGB(b_);
1168 *f_odd++ = LIMIT_RGB(g_);
1169 *f_odd++ = LIMIT_RGB(r_);
1170 f_odd++;
1171 break;
1172 case V4L2_PIX_FMT_RGB555:
1173 g = LIMIT_RGB(g_);
1174 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1175 *f_odd++ = (0x03 & ( g >> 6)) |
1176 (0x7C & (LIMIT_RGB(r_) >> 1));
1177 break;
1178 }
1179 }
1180 clipmask_odd_index += clipmask_add;
1181 f_odd += stretch_bytes;
1182
1183 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1184 *f_odd++ = y[1];
1185 *f_odd++ = u;
1186 }
1187 else {
1188 y_ = 76284 * (y[1] - 16);
1189
1190 b_ = (y_ + vb) >> 16;
1191 g_ = (y_ + uvg)>> 16;
1192 r_ = (y_ + ur) >> 16;
1193
1194 switch (frame->v4l2_format.format) {
1195 case V4L2_PIX_FMT_RGB565:
1196 g = LIMIT_RGB(g_);
1197 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3));
1198 *f_odd++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_));
1199 break;
1200 case V4L2_PIX_FMT_RGB24:
1201 *f_odd++ = LIMIT_RGB(b_);
1202 *f_odd++ = LIMIT_RGB(g_);
1203 *f_odd++ = LIMIT_RGB(r_);
1204 break;
1205 case V4L2_PIX_FMT_RGB32:
1206 *f_odd++ = LIMIT_RGB(b_);
1207 *f_odd++ = LIMIT_RGB(g_);
1208 *f_odd++ = LIMIT_RGB(r_);
1209 f_odd++;
1210 break;
1211 case V4L2_PIX_FMT_RGB555:
1212 g = LIMIT_RGB(g_);
1213 *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2));
1214 *f_odd++ = (0x03 & ( g >> 6)) |
1215 (0x7C & (LIMIT_RGB(r_) >> 1));
1216 break;
1217 }
1218 }
1219 clipmask_odd_index += clipmask_add;
1220 f_odd += stretch_bytes;
1221 }
1222
1223 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1224 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1225 * sub_block_size);
1226 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1227 * sub_block_size);
1228 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1229 * sub_block_size);
1230 }
1231
1232 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1233 + block_split * sub_block_size);
1234
1235 frame->curline += 2 * usbvision->stretch_height;
1236 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1237
1238 if (frame->curline >= frame->frmheight)
1239 return ParseState_NextFrame;
1240 else
1241 return ParseState_Continue;
1242 }
1243
1244 /*
1245 * usbvision_parse_data()
1246 *
1247 * Generic routine to parse the scratch buffer. It employs either
1248 * usbvision_find_header() or usbvision_parse_lines() to do most
1249 * of work.
1250 *
1251 */
1252 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1253 {
1254 struct usbvision_frame *frame;
1255 enum ParseState newstate;
1256 long copylen = 0;
1257 unsigned long lock_flags;
1258
1259 frame = usbvision->curFrame;
1260
1261 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1262
1263 while (1) {
1264
1265 newstate = ParseState_Out;
1266 if (scratch_len(usbvision)) {
1267 if (frame->scanstate == ScanState_Scanning) {
1268 newstate = usbvision_find_header(usbvision);
1269 }
1270 else if (frame->scanstate == ScanState_Lines) {
1271 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1272 newstate = usbvision_parse_lines_420(usbvision, &copylen);
1273 }
1274 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1275 newstate = usbvision_parse_lines_422(usbvision, &copylen);
1276 }
1277 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1278 newstate = usbvision_parse_compress(usbvision, &copylen);
1279 }
1280
1281 }
1282 }
1283 if (newstate == ParseState_Continue) {
1284 continue;
1285 }
1286 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1287 break;
1288 }
1289 else {
1290 return; /* ParseState_EndParse */
1291 }
1292 }
1293
1294 if (newstate == ParseState_NextFrame) {
1295 frame->grabstate = FrameState_Done;
1296 do_gettimeofday(&(frame->timestamp));
1297 frame->sequence = usbvision->frame_num;
1298
1299 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1300 list_move_tail(&(frame->frame), &usbvision->outqueue);
1301 usbvision->curFrame = NULL;
1302 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1303
1304 usbvision->frame_num++;
1305
1306 /* This will cause the process to request another frame. */
1307 if (waitqueue_active(&usbvision->wait_frame)) {
1308 PDEBUG(DBG_PARSE, "Wake up !");
1309 wake_up_interruptible(&usbvision->wait_frame);
1310 }
1311 }
1312 else
1313 frame->grabstate = FrameState_Grabbing;
1314
1315
1316 /* Update the frame's uncompressed length. */
1317 frame->scanlength += copylen;
1318 }
1319
1320
1321 /*
1322 * Make all of the blocks of data contiguous
1323 */
1324 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1325 struct urb *urb)
1326 {
1327 unsigned char *packet_data;
1328 int i, totlen = 0;
1329
1330 for (i = 0; i < urb->number_of_packets; i++) {
1331 int packet_len = urb->iso_frame_desc[i].actual_length;
1332 int packet_stat = urb->iso_frame_desc[i].status;
1333
1334 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1335
1336 /* Detect and ignore errored packets */
1337 if (packet_stat) { // packet_stat != 0 ?????????????
1338 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1339 usbvision->isocErrCount++;
1340 continue;
1341 }
1342
1343 /* Detect and ignore empty packets */
1344 if (packet_len < 0) {
1345 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1346 usbvision->isocSkipCount++;
1347 continue;
1348 }
1349 else if (packet_len == 0) { /* Frame end ????? */
1350 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1351 usbvision->isocstate=IsocState_NoFrame;
1352 usbvision->isocSkipCount++;
1353 continue;
1354 }
1355 else if (packet_len > usbvision->isocPacketSize) {
1356 PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1357 usbvision->isocSkipCount++;
1358 continue;
1359 }
1360
1361 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1362
1363 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1364 usbvision->isocstate=IsocState_InFrame;
1365 scratch_mark_header(usbvision);
1366 usbvision_measure_bandwidth(usbvision);
1367 PDEBUG(DBG_ISOC, "packet with header");
1368 }
1369
1370 /*
1371 * If usbvision continues to feed us with data but there is no
1372 * consumption (if, for example, V4L client fell asleep) we
1373 * may overflow the buffer. We have to move old data over to
1374 * free room for new data. This is bad for old data. If we
1375 * just drop new data then it's bad for new data... choose
1376 * your favorite evil here.
1377 */
1378 if (scratch_free(usbvision) < packet_len) {
1379
1380 usbvision->scratch_ovf_count++;
1381 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1382 scratch_len(usbvision), packet_len);
1383 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1384 }
1385
1386 /* Now we know that there is enough room in scratch buffer */
1387 scratch_put(usbvision, packet_data, packet_len);
1388 totlen += packet_len;
1389 usbvision->isocDataCount += packet_len;
1390 usbvision->isocPacketCount++;
1391 }
1392 #if ENABLE_HEXDUMP
1393 if (totlen > 0) {
1394 static int foo = 0;
1395 if (foo < 1) {
1396 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1397 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1398 ++foo;
1399 }
1400 }
1401 #endif
1402 return totlen;
1403 }
1404
1405 static void usbvision_isocIrq(struct urb *urb)
1406 {
1407 int errCode = 0;
1408 int len;
1409 struct usb_usbvision *usbvision = urb->context;
1410 int i;
1411 unsigned long startTime = jiffies;
1412 struct usbvision_frame **f;
1413
1414 /* We don't want to do anything if we are about to be removed! */
1415 if (!USBVISION_IS_OPERATIONAL(usbvision))
1416 return;
1417
1418 f = &usbvision->curFrame;
1419
1420 /* Manage streaming interruption */
1421 if (usbvision->streaming == Stream_Interrupt) {
1422 usbvision->streaming = Stream_Idle;
1423 if ((*f)) {
1424 (*f)->grabstate = FrameState_Ready;
1425 (*f)->scanstate = ScanState_Scanning;
1426 }
1427 PDEBUG(DBG_IRQ, "stream interrupted");
1428 wake_up_interruptible(&usbvision->wait_stream);
1429 }
1430
1431 /* Copy the data received into our scratch buffer */
1432 len = usbvision_compress_isochronous(usbvision, urb);
1433
1434 usbvision->isocUrbCount++;
1435 usbvision->urb_length = len;
1436
1437 if (usbvision->streaming == Stream_On) {
1438
1439 /* If we collected enough data let's parse! */
1440 if (scratch_len(usbvision) > USBVISION_HEADER_LENGTH) { /* 12 == header_length */
1441 /*If we don't have a frame we're current working on, complain */
1442 if(!list_empty(&(usbvision->inqueue))) {
1443 if (!(*f)) {
1444 (*f) = list_entry(usbvision->inqueue.next,struct usbvision_frame, frame);
1445 }
1446 usbvision_parse_data(usbvision);
1447 }
1448 else {
1449 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1450 scratch_reset(usbvision);
1451 }
1452 }
1453 }
1454 else {
1455 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1456 scratch_reset(usbvision);
1457 }
1458
1459 usbvision->timeInIrq += jiffies - startTime;
1460
1461 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1462 urb->iso_frame_desc[i].status = 0;
1463 urb->iso_frame_desc[i].actual_length = 0;
1464 }
1465
1466 urb->status = 0;
1467 urb->dev = usbvision->dev;
1468 errCode = usb_submit_urb (urb, GFP_ATOMIC);
1469
1470 /* Disable this warning. By design of the driver. */
1471 // if(errCode) {
1472 // err("%s: usb_submit_urb failed: error %d", __FUNCTION__, errCode);
1473 // }
1474
1475 return;
1476 }
1477
1478 /*************************************/
1479 /* Low level usbvision access functions */
1480 /*************************************/
1481
1482 /*
1483 * usbvision_read_reg()
1484 *
1485 * return < 0 -> Error
1486 * >= 0 -> Data
1487 */
1488
1489 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1490 {
1491 int errCode = 0;
1492 unsigned char buffer[1];
1493
1494 if (!USBVISION_IS_OPERATIONAL(usbvision))
1495 return -1;
1496
1497 errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1498 USBVISION_OP_CODE,
1499 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1500 0, (__u16) reg, buffer, 1, HZ);
1501
1502 if (errCode < 0) {
1503 err("%s: failed: error %d", __FUNCTION__, errCode);
1504 return errCode;
1505 }
1506 return buffer[0];
1507 }
1508
1509 /*
1510 * usbvision_write_reg()
1511 *
1512 * return 1 -> Reg written
1513 * 0 -> usbvision is not yet ready
1514 * -1 -> Something went wrong
1515 */
1516
1517 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1518 unsigned char value)
1519 {
1520 int errCode = 0;
1521
1522 if (!USBVISION_IS_OPERATIONAL(usbvision))
1523 return 0;
1524
1525 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1526 USBVISION_OP_CODE,
1527 USB_DIR_OUT | USB_TYPE_VENDOR |
1528 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1529
1530 if (errCode < 0) {
1531 err("%s: failed: error %d", __FUNCTION__, errCode);
1532 }
1533 return errCode;
1534 }
1535
1536
1537 static void usbvision_ctrlUrb_complete(struct urb *urb)
1538 {
1539 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1540
1541 PDEBUG(DBG_IRQ, "");
1542 usbvision->ctrlUrbBusy = 0;
1543 if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1544 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1545 }
1546 }
1547
1548
1549 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1550 unsigned char *data, int len)
1551 {
1552 int errCode = 0;
1553
1554 PDEBUG(DBG_IRQ, "");
1555 if (len > 8) {
1556 return -EFAULT;
1557 }
1558 // down(&usbvision->ctrlUrbLock);
1559 if (usbvision->ctrlUrbBusy) {
1560 // up(&usbvision->ctrlUrbLock);
1561 return -EBUSY;
1562 }
1563 usbvision->ctrlUrbBusy = 1;
1564 // up(&usbvision->ctrlUrbLock);
1565
1566 usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1567 usbvision->ctrlUrbSetup.bRequest = USBVISION_OP_CODE;
1568 usbvision->ctrlUrbSetup.wValue = 0;
1569 usbvision->ctrlUrbSetup.wIndex = cpu_to_le16(address);
1570 usbvision->ctrlUrbSetup.wLength = cpu_to_le16(len);
1571 usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1572 usb_sndctrlpipe(usbvision->dev, 1),
1573 (unsigned char *)&usbvision->ctrlUrbSetup,
1574 (void *)usbvision->ctrlUrbBuffer, len,
1575 usbvision_ctrlUrb_complete,
1576 (void *)usbvision);
1577
1578 memcpy(usbvision->ctrlUrbBuffer, data, len);
1579
1580 errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1581 if (errCode < 0) {
1582 // error in usb_submit_urb()
1583 usbvision->ctrlUrbBusy = 0;
1584 }
1585 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1586 return errCode;
1587 }
1588
1589
1590 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1591 {
1592 int errCode = 0;
1593
1594 usbvision->lastIsocFrameNum = -1;
1595 usbvision->isocDataCount = 0;
1596 usbvision->isocPacketCount = 0;
1597 usbvision->isocSkipCount = 0;
1598 usbvision->comprLevel = 50;
1599 usbvision->lastComprLevel = -1;
1600 usbvision->isocUrbCount = 0;
1601 usbvision->requestIntra = 1;
1602 usbvision->isocMeasureBandwidthCount = 0;
1603
1604 return errCode;
1605 }
1606
1607 /* this function measures the used bandwidth since last call
1608 * return: 0 : no error
1609 * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1610 */
1611 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1612 {
1613 int errCode = 0;
1614
1615 if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1616 usbvision->isocMeasureBandwidthCount++;
1617 return errCode;
1618 }
1619 if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1620 usbvision->usedBandwidth = usbvision->isocDataCount /
1621 (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1622 100 / usbvision->isocPacketSize;
1623 }
1624 usbvision->isocMeasureBandwidthCount = 0;
1625 usbvision->isocDataCount = 0;
1626 usbvision->isocPacketCount = 0;
1627 usbvision->isocSkipCount = 0;
1628 return errCode;
1629 }
1630
1631 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1632 {
1633 int errCode = 0;
1634 unsigned char buffer[6];
1635
1636 PDEBUG(DBG_IRQ, "");
1637 if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1638 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1639 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1640 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1641 int distorsion;
1642 if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1643 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM Threshold 1
1644 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM Threshold 2
1645 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1646 buffer[2] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (inter)
1647 buffer[3] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (intra)
1648 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1649 buffer[4] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (inter)
1650 buffer[5] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (intra)
1651 }
1652 else { //BRIDGE_NT1003
1653 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM threshold 1
1654 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM threshold 2
1655 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1656 buffer[2] = (unsigned char)(distorsion & 0xFF); // distorsion threshold bit0-7
1657 buffer[3] = 0; //(unsigned char)((distorsion >> 8) & 0x0F); // distorsion threshold bit 8-11
1658 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1659 buffer[4] = (unsigned char)(distorsion & 0xFF); // maximum distorsion bit0-7
1660 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01); // maximum distorsion bit 8
1661 }
1662 errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1663 if (errCode == 0){
1664 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1665 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1666 usbvision->lastComprLevel = usbvision->comprLevel;
1667 }
1668 }
1669 }
1670 return errCode;
1671 }
1672
1673 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1674 {
1675 int errCode = 0;
1676 unsigned char buffer[1];
1677
1678 PDEBUG(DBG_IRQ, "");
1679 usbvision->requestIntra = 1;
1680 buffer[0] = 1;
1681 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1682 return errCode;
1683 }
1684
1685 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1686 {
1687 int errCode = 0;
1688 unsigned char buffer[1];
1689
1690 PDEBUG(DBG_IRQ, "");
1691 usbvision->requestIntra = 0;
1692 buffer[0] = 0;
1693 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1694 return errCode;
1695 }
1696
1697 /*******************************
1698 * usbvision utility functions
1699 *******************************/
1700
1701 int usbvision_power_off(struct usb_usbvision *usbvision)
1702 {
1703 int errCode = 0;
1704
1705 PDEBUG(DBG_FUNC, "");
1706
1707 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1708 if (errCode == 1) {
1709 usbvision->power = 0;
1710 }
1711 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1712 return errCode;
1713 }
1714
1715 /*
1716 * usbvision_set_video_format()
1717 *
1718 */
1719 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1720 {
1721 static const char proc[] = "usbvision_set_video_format";
1722 int rc;
1723 unsigned char value[2];
1724
1725 if (!USBVISION_IS_OPERATIONAL(usbvision))
1726 return 0;
1727
1728 PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1729
1730 if ((format != ISOC_MODE_YUV422)
1731 && (format != ISOC_MODE_YUV420)
1732 && (format != ISOC_MODE_COMPRESS)) {
1733 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1734 format);
1735 format = ISOC_MODE_YUV420;
1736 }
1737 value[0] = 0x0A; //TODO: See the effect of the filter
1738 value[1] = format;
1739 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1740 USBVISION_OP_CODE,
1741 USB_DIR_OUT | USB_TYPE_VENDOR |
1742 USB_RECIP_ENDPOINT, 0,
1743 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1744
1745 if (rc < 0) {
1746 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1747 "reconnect or reload driver.\n", proc, rc);
1748 }
1749 usbvision->isocMode = format;
1750 return rc;
1751 }
1752
1753 /*
1754 * usbvision_set_output()
1755 *
1756 */
1757
1758 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1759 int height)
1760 {
1761 int errCode = 0;
1762 int UsbWidth, UsbHeight;
1763 unsigned int frameRate=0, frameDrop=0;
1764 unsigned char value[4];
1765
1766 if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1767 return 0;
1768 }
1769
1770 if (width > MAX_USB_WIDTH) {
1771 UsbWidth = width / 2;
1772 usbvision->stretch_width = 2;
1773 }
1774 else {
1775 UsbWidth = width;
1776 usbvision->stretch_width = 1;
1777 }
1778
1779 if (height > MAX_USB_HEIGHT) {
1780 UsbHeight = height / 2;
1781 usbvision->stretch_height = 2;
1782 }
1783 else {
1784 UsbHeight = height;
1785 usbvision->stretch_height = 1;
1786 }
1787
1788 RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1789 UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1790 RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1791 UsbHeight &= ~(1);
1792
1793 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1794 UsbWidth, UsbHeight, width, height,
1795 usbvision->stretch_width, usbvision->stretch_height);
1796
1797 /* I'll not rewrite the same values */
1798 if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1799 value[0] = UsbWidth & 0xff; //LSB
1800 value[1] = (UsbWidth >> 8) & 0x03; //MSB
1801 value[2] = UsbHeight & 0xff; //LSB
1802 value[3] = (UsbHeight >> 8) & 0x03; //MSB
1803
1804 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1805 USBVISION_OP_CODE,
1806 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1807 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1808
1809 if (errCode < 0) {
1810 err("%s failed: error %d", __FUNCTION__, errCode);
1811 return errCode;
1812 }
1813 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1814 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1815 }
1816
1817 if (usbvision->isocMode == ISOC_MODE_YUV422) {
1818 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1819 }
1820 else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1821 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1822 }
1823 else {
1824 frameRate = FRAMERATE_MAX;
1825 }
1826
1827 if (usbvision->tvnorm->id & V4L2_STD_625_50) {
1828 frameDrop = frameRate * 32 / 25 - 1;
1829 }
1830 else if (usbvision->tvnorm->id & V4L2_STD_525_60) {
1831 frameDrop = frameRate * 32 / 30 - 1;
1832 }
1833
1834 RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1835
1836 PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1837
1838 frameDrop = FRAMERATE_MAX; // We can allow the maximum here, because dropping is controlled
1839
1840 /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1841 => frameSkip = 4;
1842 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1843
1844 frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1845 => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1846 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1847 */
1848 errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1849 return errCode;
1850 }
1851
1852
1853 /*
1854 * usbvision_frames_alloc
1855 * allocate the required frames
1856 */
1857 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1858 {
1859 int i;
1860
1861 /*needs to be page aligned cause the buffers can be mapped individually! */
1862 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
1863 usbvision->curheight *
1864 usbvision->palette.bytes_per_pixel);
1865
1866 /* Try to do my best to allocate the frames the user want in the remaining memory */
1867 usbvision->num_frames = number_of_frames;
1868 while (usbvision->num_frames > 0) {
1869 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1870 if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
1871 break;
1872 }
1873 usbvision->num_frames--;
1874 }
1875
1876 spin_lock_init(&usbvision->queue_lock);
1877 init_waitqueue_head(&usbvision->wait_frame);
1878 init_waitqueue_head(&usbvision->wait_stream);
1879
1880 /* Allocate all buffers */
1881 for (i = 0; i < usbvision->num_frames; i++) {
1882 usbvision->frame[i].index = i;
1883 usbvision->frame[i].grabstate = FrameState_Unused;
1884 usbvision->frame[i].data = usbvision->fbuf +
1885 i * usbvision->max_frame_size;
1886 /*
1887 * Set default sizes for read operation.
1888 */
1889 usbvision->stretch_width = 1;
1890 usbvision->stretch_height = 1;
1891 usbvision->frame[i].width = usbvision->curwidth;
1892 usbvision->frame[i].height = usbvision->curheight;
1893 usbvision->frame[i].bytes_read = 0;
1894 }
1895 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
1896 return usbvision->num_frames;
1897 }
1898
1899 /*
1900 * usbvision_frames_free
1901 * frees memory allocated for the frames
1902 */
1903 void usbvision_frames_free(struct usb_usbvision *usbvision)
1904 {
1905 /* Have to free all that memory */
1906 PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
1907
1908 if (usbvision->fbuf != NULL) {
1909 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1910 usbvision->fbuf = NULL;
1911
1912 usbvision->num_frames = 0;
1913 }
1914 }
1915 /*
1916 * usbvision_empty_framequeues()
1917 * prepare queues for incoming and outgoing frames
1918 */
1919 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1920 {
1921 u32 i;
1922
1923 INIT_LIST_HEAD(&(usbvision->inqueue));
1924 INIT_LIST_HEAD(&(usbvision->outqueue));
1925
1926 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1927 usbvision->frame[i].grabstate = FrameState_Unused;
1928 usbvision->frame[i].bytes_read = 0;
1929 }
1930 }
1931
1932 /*
1933 * usbvision_stream_interrupt()
1934 * stops streaming
1935 */
1936 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1937 {
1938 int ret = 0;
1939
1940 /* stop reading from the device */
1941
1942 usbvision->streaming = Stream_Interrupt;
1943 ret = wait_event_timeout(usbvision->wait_stream,
1944 (usbvision->streaming == Stream_Idle),
1945 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1946 return ret;
1947 }
1948
1949 /*
1950 * usbvision_set_compress_params()
1951 *
1952 */
1953
1954 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
1955 {
1956 static const char proc[] = "usbvision_set_compresion_params: ";
1957 int rc;
1958 unsigned char value[6];
1959
1960 value[0] = 0x0F; // Intra-Compression cycle
1961 value[1] = 0x01; // Reg.45 one line per strip
1962 value[2] = 0x00; // Reg.46 Force intra mode on all new frames
1963 value[3] = 0x00; // Reg.47 FORCE_UP <- 0 normal operation (not force)
1964 value[4] = 0xA2; // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
1965 value[5] = 0x00; // Reg.49 DVI_YUV This has nothing to do with compression
1966
1967 //catched values for NT1004
1968 // value[0] = 0xFF; // Never apply intra mode automatically
1969 // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
1970 // value[2] = 0x01; // Force intra mode on all new frames
1971 // value[3] = 0x00; // Strip size 400 Bytes; do not force up
1972 // value[4] = 0xA2; //
1973 if (!USBVISION_IS_OPERATIONAL(usbvision))
1974 return 0;
1975
1976 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1977 USBVISION_OP_CODE,
1978 USB_DIR_OUT | USB_TYPE_VENDOR |
1979 USB_RECIP_ENDPOINT, 0,
1980 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
1981
1982 if (rc < 0) {
1983 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
1984 "reconnect or reload driver.\n", proc, rc);
1985 return rc;
1986 }
1987
1988 if (usbvision->bridgeType == BRIDGE_NT1004) {
1989 value[0] = 20; // PCM Threshold 1
1990 value[1] = 12; // PCM Threshold 2
1991 value[2] = 255; // Distorsion Threshold inter
1992 value[3] = 255; // Distorsion Threshold intra
1993 value[4] = 43; // Max Distorsion inter
1994 value[5] = 43; // Max Distorsion intra
1995 }
1996 else {
1997 value[0] = 20; // PCM Threshold 1
1998 value[1] = 12; // PCM Threshold 2
1999 value[2] = 255; // Distorsion Threshold d7-d0
2000 value[3] = 0; // Distorsion Threshold d11-d8
2001 value[4] = 43; // Max Distorsion d7-d0
2002 value[5] = 0; // Max Distorsion d8
2003 }
2004
2005 if (!USBVISION_IS_OPERATIONAL(usbvision))
2006 return 0;
2007
2008 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2009 USBVISION_OP_CODE,
2010 USB_DIR_OUT | USB_TYPE_VENDOR |
2011 USB_RECIP_ENDPOINT, 0,
2012 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2013
2014 if (rc < 0) {
2015 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2016 "reconnect or reload driver.\n", proc, rc);
2017 return rc;
2018 }
2019
2020
2021 return rc;
2022 }
2023
2024
2025 /*
2026 * usbvision_set_input()
2027 *
2028 * Set the input (saa711x, ...) size x y and other misc input params
2029 * I've no idea if this parameters are right
2030 *
2031 */
2032 int usbvision_set_input(struct usb_usbvision *usbvision)
2033 {
2034 static const char proc[] = "usbvision_set_input: ";
2035 int rc;
2036 unsigned char value[8];
2037 unsigned char dvi_yuv_value;
2038
2039 if (!USBVISION_IS_OPERATIONAL(usbvision))
2040 return 0;
2041
2042 /* Set input format expected from decoder*/
2043 if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) {
2044 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1;
2045 } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2046 /* SAA7113 uses 8 bit output */
2047 value[0] = USBVISION_8_422_SYNC;
2048 } else {
2049 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2050 * as that is how saa7111 is configured */
2051 value[0] = USBVISION_16_422_SYNC;
2052 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2053 }
2054
2055 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2056 if (rc < 0) {
2057 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2058 "reconnect or reload driver.\n", proc, rc);
2059 return rc;
2060 }
2061
2062
2063 if (usbvision->tvnorm->id & V4L2_STD_PAL) {
2064 value[0] = 0xC0;
2065 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2066 value[2] = 0x20;
2067 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2068 value[4] = 0x60;
2069 value[5] = 0x00; //0x0060 -> 96 Input video h offset
2070 value[6] = 0x16;
2071 value[7] = 0x00; //0x0016 -> 22 Input video v offset
2072 } else if (usbvision->tvnorm->id & V4L2_STD_SECAM) {
2073 value[0] = 0xC0;
2074 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2075 value[2] = 0x20;
2076 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2077 value[4] = 0x01;
2078 value[5] = 0x00; //0x0001 -> 01 Input video h offset
2079 value[6] = 0x01;
2080 value[7] = 0x00; //0x0001 -> 01 Input video v offset
2081 } else { /* V4L2_STD_NTSC */
2082 value[0] = 0xD0;
2083 value[1] = 0x02; //0x02D0 -> 720 Input video line length
2084 value[2] = 0xF0;
2085 value[3] = 0x00; //0x00F0 -> 240 Input video number of lines
2086 value[4] = 0x50;
2087 value[5] = 0x00; //0x0050 -> 80 Input video h offset
2088 value[6] = 0x10;
2089 value[7] = 0x00; //0x0010 -> 16 Input video v offset
2090 }
2091
2092 if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2093 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2094 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2095 }
2096
2097 if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2098 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2099 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2100 }
2101
2102 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2103 USBVISION_OP_CODE, /* USBVISION specific code */
2104 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2105 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2106 if (rc < 0) {
2107 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2108 "reconnect or reload driver.\n", proc, rc);
2109 return rc;
2110 }
2111
2112
2113 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2114
2115 if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){
2116 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv;
2117 }
2118 else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2119 /* This changes as the fine sync control changes. Further investigation necessary */
2120 dvi_yuv_value = 0x06;
2121 }
2122
2123 return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2124 }
2125
2126
2127 /*
2128 * usbvision_set_dram_settings()
2129 *
2130 * Set the buffer address needed by the usbvision dram to operate
2131 * This values has been taken with usbsnoop.
2132 *
2133 */
2134
2135 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2136 {
2137 int rc;
2138 unsigned char value[8];
2139
2140 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2141 value[0] = 0x42;
2142 value[1] = 0x71;
2143 value[2] = 0xff;
2144 value[3] = 0x00;
2145 value[4] = 0x98;
2146 value[5] = 0xe0;
2147 value[6] = 0x71;
2148 value[7] = 0xff;
2149 // UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2150 // FDL: 0x00000-0x0E099 = 57498 Words
2151 // VDW: 0x0E3FF-0x3FFFF
2152 }
2153 else {
2154 value[0] = 0x42;
2155 value[1] = 0x00;
2156 value[2] = 0xff;
2157 value[3] = 0x00;
2158 value[4] = 0x00;
2159 value[5] = 0x00;
2160 value[6] = 0x00;
2161 value[7] = 0xff;
2162 }
2163 /* These are the values of the address of the video buffer,
2164 * they have to be loaded into the USBVISION_DRM_PRM1-8
2165 *
2166 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2167 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2168 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2169 * Only used in compressed mode
2170 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2171 * Only used in compressed mode
2172 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2173 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2174 */
2175
2176 if (!USBVISION_IS_OPERATIONAL(usbvision))
2177 return 0;
2178
2179 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2180 USBVISION_OP_CODE, /* USBVISION specific code */
2181 USB_DIR_OUT | USB_TYPE_VENDOR |
2182 USB_RECIP_ENDPOINT, 0,
2183 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2184
2185 if (rc < 0) {
2186 err("%sERROR=%d", __FUNCTION__, rc);
2187 return rc;
2188 }
2189
2190 /* Restart the video buffer logic */
2191 if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2192 USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2193 return rc;
2194 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2195
2196 return rc;
2197 }
2198
2199 /*
2200 * ()
2201 *
2202 * Power on the device, enables suspend-resume logic
2203 * & reset the isoc End-Point
2204 *
2205 */
2206
2207 int usbvision_power_on(struct usb_usbvision *usbvision)
2208 {
2209 int errCode = 0;
2210
2211 PDEBUG(DBG_FUNC, "");
2212
2213 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2214 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2215 USBVISION_SSPND_EN | USBVISION_RES2);
2216
2217 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2218 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2219 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2220 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2221 if (errCode == 1) {
2222 usbvision->power = 1;
2223 }
2224 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2225 return errCode;
2226 }
2227
2228
2229 /*
2230 * usbvision timer stuff
2231 */
2232
2233 // to call usbvision_power_off from task queue
2234 static void call_usbvision_power_off(struct work_struct *work)
2235 {
2236 struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2237
2238 PDEBUG(DBG_FUNC, "");
2239 down_interruptible(&usbvision->lock);
2240 if(usbvision->user == 0) {
2241 usbvision_i2c_usb_del_bus(&usbvision->i2c_adap);
2242
2243 usbvision_power_off(usbvision);
2244 usbvision->initialized = 0;
2245 }
2246 up(&usbvision->lock);
2247 }
2248
2249 static void usbvision_powerOffTimer(unsigned long data)
2250 {
2251 struct usb_usbvision *usbvision = (void *) data;
2252
2253 PDEBUG(DBG_FUNC, "");
2254 del_timer(&usbvision->powerOffTimer);
2255 INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2256 (void) schedule_work(&usbvision->powerOffWork);
2257
2258 }
2259
2260 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2261 {
2262 init_timer(&usbvision->powerOffTimer);
2263 usbvision->powerOffTimer.data = (long) usbvision;
2264 usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2265 }
2266
2267 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2268 {
2269 mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2270 }
2271
2272 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2273 {
2274 if (timer_pending(&usbvision->powerOffTimer)) {
2275 del_timer(&usbvision->powerOffTimer);
2276 }
2277 }
2278
2279 /*
2280 * usbvision_begin_streaming()
2281 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2282 * idea about the rest
2283 */
2284 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2285 {
2286 int errCode = 0;
2287
2288 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2289 usbvision_init_compression(usbvision);
2290 }
2291 errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2292 usbvision->Vin_Reg2_Preset);
2293 return errCode;
2294 }
2295
2296 /*
2297 * usbvision_restart_isoc()
2298 * Not sure yet if touching here PWR_REG make loose the config
2299 */
2300
2301 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2302 {
2303 int ret;
2304
2305 if (
2306 (ret =
2307 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2308 USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2309 return ret;
2310 if (
2311 (ret =
2312 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2313 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2314 USBVISION_RES2)) < 0)
2315 return ret;
2316 if (
2317 (ret =
2318 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2319 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2320 usbvision->Vin_Reg2_Preset)) < 0) return ret;
2321
2322 /* TODO: schedule timeout */
2323 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2324
2325 return 0;
2326 }
2327
2328 int usbvision_audio_off(struct usb_usbvision *usbvision)
2329 {
2330 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2331 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2332 return -1;
2333 }
2334 usbvision->AudioMute = 0;
2335 usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2336 return 0;
2337 }
2338
2339 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2340 {
2341 if (!usbvision->AudioMute) {
2342 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2343 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2344 return -1;
2345 }
2346 }
2347 usbvision->AudioChannel = AudioChannel;
2348 return 0;
2349 }
2350
2351 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2352 {
2353 usbvision_set_video_format(usbvision, format);
2354 usbvision_set_dram_settings(usbvision);
2355 usbvision_set_compress_params(usbvision);
2356 usbvision_set_input(usbvision);
2357 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2358 usbvision_restart_isoc(usbvision);
2359
2360 /* cosas del PCM */
2361 return USBVISION_IS_OPERATIONAL(usbvision);
2362 }
2363
2364 int usbvision_set_alternate(struct usb_usbvision *dev)
2365 {
2366 int errCode, prev_alt = dev->ifaceAlt;
2367 int i;
2368
2369 dev->ifaceAlt=0;
2370 for(i=0;i< dev->num_alt; i++)
2371 if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt])
2372 dev->ifaceAlt=i;
2373
2374 if (dev->ifaceAlt != prev_alt) {
2375 dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt];
2376 PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize);
2377 errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt);
2378 if (errCode < 0) {
2379 err ("cannot change alternate number to %d (error=%i)",
2380 dev->ifaceAlt, errCode);
2381 return errCode;
2382 }
2383 }
2384
2385 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize);
2386
2387 return 0;
2388 }
2389
2390 /*
2391 * usbvision_init_isoc()
2392 *
2393 */
2394 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2395 {
2396 struct usb_device *dev = usbvision->dev;
2397 int bufIdx, errCode, regValue;
2398 const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
2399
2400 if (!USBVISION_IS_OPERATIONAL(usbvision))
2401 return -EFAULT;
2402
2403 usbvision->curFrame = NULL;
2404 scratch_reset(usbvision);
2405
2406 /* Alternate interface 1 is is the biggest frame size */
2407 errCode = usbvision_set_alternate(usbvision);
2408 if (errCode < 0) {
2409 usbvision->last_error = errCode;
2410 return -EBUSY;
2411 }
2412
2413 regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2414
2415 usbvision->usb_bandwidth = regValue >> 1;
2416 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2417
2418
2419
2420 /* We double buffer the Iso lists */
2421
2422 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2423 int j, k;
2424 struct urb *urb;
2425
2426 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2427 if (urb == NULL) {
2428 err("%s: usb_alloc_urb() failed", __FUNCTION__);
2429 return -ENOMEM;
2430 }
2431 usbvision->sbuf[bufIdx].urb = urb;
2432 usbvision->sbuf[bufIdx].data = usb_buffer_alloc(usbvision->dev, sb_size, GFP_KERNEL,&urb->transfer_dma);
2433 urb->dev = dev;
2434 urb->context = usbvision;
2435 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2436 urb->transfer_flags = URB_ISO_ASAP;
2437 urb->interval = 1;
2438 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2439 urb->complete = usbvision_isocIrq;
2440 urb->number_of_packets = USBVISION_URB_FRAMES;
2441 urb->transfer_buffer_length =
2442 usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2443 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2444 k += usbvision->isocPacketSize) {
2445 urb->iso_frame_desc[j].offset = k;
2446 urb->iso_frame_desc[j].length = usbvision->isocPacketSize;
2447 }
2448 }
2449
2450
2451 /* Submit all URBs */
2452 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2453 errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb, GFP_KERNEL);
2454 if (errCode) {
2455 err("%s: usb_submit_urb(%d) failed: error %d", __FUNCTION__, bufIdx, errCode);
2456 }
2457 }
2458
2459 usbvision->streaming = Stream_Idle;
2460 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", __FUNCTION__, usbvision->video_endp);
2461 return 0;
2462 }
2463
2464 /*
2465 * usbvision_stop_isoc()
2466 *
2467 * This procedure stops streaming and deallocates URBs. Then it
2468 * activates zero-bandwidth alt. setting of the video interface.
2469 *
2470 */
2471 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2472 {
2473 int bufIdx, errCode, regValue;
2474 const int sb_size = USBVISION_URB_FRAMES * USBVISION_MAX_ISOC_PACKET_SIZE;
2475
2476 if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2477 return;
2478
2479 /* Unschedule all of the iso td's */
2480 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2481 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2482 if (usbvision->sbuf[bufIdx].data){
2483 usb_buffer_free(usbvision->dev,
2484 sb_size,
2485 usbvision->sbuf[bufIdx].data,
2486 usbvision->sbuf[bufIdx].urb->transfer_dma);
2487 }
2488 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2489 usbvision->sbuf[bufIdx].urb = NULL;
2490 }
2491
2492
2493 PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __FUNCTION__);
2494 usbvision->streaming = Stream_Off;
2495
2496 if (!usbvision->remove_pending) {
2497
2498 /* Set packet size to 0 */
2499 usbvision->ifaceAlt=0;
2500 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2501 usbvision->ifaceAlt);
2502 if (errCode < 0) {
2503 err("%s: usb_set_interface() failed: error %d", __FUNCTION__, errCode);
2504 usbvision->last_error = errCode;
2505 }
2506 regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2507 usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1;
2508 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize);
2509
2510 usbvision->usb_bandwidth = regValue >> 1;
2511 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth);
2512 }
2513 }
2514
2515 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2516 {
2517 int mode[4];
2518 int audio[]= {1, 0, 0, 0};
2519 struct v4l2_routing route;
2520 //channel 0 is TV with audiochannel 1 (tuner mono)
2521 //channel 1 is Composite with audio channel 0 (line in)
2522 //channel 2 is S-Video with audio channel 0 (line in)
2523 //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2524
2525 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2526 usbvision->ctl_input = channel;
2527 route.input = SAA7115_COMPOSITE1;
2528 route.output = 0;
2529 call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2530 call_i2c_clients(usbvision, VIDIOC_S_INPUT, &usbvision->ctl_input);
2531
2532 // set the new channel
2533 // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2534 // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2535
2536 switch (usbvision_device_data[usbvision->DevModel].Codec) {
2537 case CODEC_SAA7113:
2538 if (SwitchSVideoInput) { // To handle problems with S-Video Input for some devices. Use SwitchSVideoInput parameter when loading the module.
2539 mode[2] = 1;
2540 }
2541 else {
2542 mode[2] = 7;
2543 }
2544 if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) {
2545 mode[0] = 0; mode[1] = 2; mode[3] = 3; // Special for four input devices
2546 }
2547 else {
2548 mode[0] = 0; mode[1] = 2; //modes for regular saa7113 devices
2549 }
2550 break;
2551 case CODEC_SAA7111:
2552 mode[0] = 0; mode[1] = 1; mode[2] = 7; //modes for saa7111
2553 break;
2554 default:
2555 mode[0] = 0; mode[1] = 1; mode[2] = 7; //default modes
2556 }
2557 route.input = mode[channel];
2558 call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2559 usbvision->channel = channel;
2560 usbvision_set_audio(usbvision, audio[channel]);
2561 return 0;
2562 }
2563
2564 /*
2565 * Overrides for Emacs so that we follow Linus's tabbing style.
2566 * ---------------------------------------------------------------------------
2567 * Local variables:
2568 * c-basic-offset: 8
2569 * End:
2570 */
Support for the Chinese Samsung S3C2440 based development boards