Merge branch 'linus' into sched/core
[linux-3.10.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/gfp.h>
30 #include <linux/mm.h>
31 #include <linux/highmem.h>
32 #include <linux/vmalloc.h>
33 #include <linux/module.h>
34 #include <linux/init.h>
35 #include <linux/spinlock.h>
36 #include <asm/io.h>
37 #include <linux/videodev2.h>
38 #include <linux/i2c.h>
39
40 #include <media/saa7115.h>
41 #include <media/v4l2-common.h>
42 #include <media/tuner.h>
43
44 #include <linux/workqueue.h>
45
46 #include "usbvision.h"
47
48 static unsigned int core_debug;
49 module_param(core_debug,int,0644);
50 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
51
52 static unsigned int force_testpattern;
53 module_param(force_testpattern,int,0644);
54 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
55
56 static int adjustCompression = 1;       /* Set the compression to be adaptive */
57 module_param(adjustCompression, int, 0444);
58 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device.  Default: 1 (On)");
59
60 /* To help people with Black and White output with using s-video input.
61  * Some cables and input device are wired differently. */
62 static int SwitchSVideoInput;
63 module_param(SwitchSVideoInput, int, 0444);
64 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input.  Some cables and input device are wired differently. Default: 0 (Off)");
65
66 static unsigned int adjust_X_Offset = -1;
67 module_param(adjust_X_Offset, int, 0644);
68 MODULE_PARM_DESC(adjust_X_Offset, "adjust X offset display [core]");
69
70 static unsigned int adjust_Y_Offset = -1;
71 module_param(adjust_Y_Offset, int, 0644);
72 MODULE_PARM_DESC(adjust_Y_Offset, "adjust Y offset display [core]");
73
74
75 #define ENABLE_HEXDUMP  0       /* Enable if you need it */
76
77
78 #ifdef USBVISION_DEBUG
79         #define PDEBUG(level, fmt, args...) { \
80                 if (core_debug & (level)) \
81                         printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
82                                 __func__, __LINE__ , ## args); \
83         }
84 #else
85         #define PDEBUG(level, fmt, args...) do {} while(0)
86 #endif
87
88 #define DBG_HEADER      1<<0
89 #define DBG_IRQ         1<<1
90 #define DBG_ISOC        1<<2
91 #define DBG_PARSE       1<<3
92 #define DBG_SCRATCH     1<<4
93 #define DBG_FUNC        1<<5
94
95 static const int max_imgwidth = MAX_FRAME_WIDTH;
96 static const int max_imgheight = MAX_FRAME_HEIGHT;
97 static const int min_imgwidth = MIN_FRAME_WIDTH;
98 static const int min_imgheight = MIN_FRAME_HEIGHT;
99
100 /* The value of 'scratch_buf_size' affects quality of the picture
101  * in many ways. Shorter buffers may cause loss of data when client
102  * is too slow. Larger buffers are memory-consuming and take longer
103  * to work with. This setting can be adjusted, but the default value
104  * should be OK for most desktop users.
105  */
106 #define DEFAULT_SCRATCH_BUF_SIZE        (0x20000)               // 128kB memory scratch buffer
107 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
108
109 // Function prototypes
110 static int usbvision_request_intra (struct usb_usbvision *usbvision);
111 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
112 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
113 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
114
115 /*******************************/
116 /* Memory management functions */
117 /*******************************/
118
119 /*
120  * Here we want the physical address of the memory.
121  * This is used when initializing the contents of the area.
122  */
123
124 static void *usbvision_rvmalloc(unsigned long size)
125 {
126         void *mem;
127         unsigned long adr;
128
129         size = PAGE_ALIGN(size);
130         mem = vmalloc_32(size);
131         if (!mem)
132                 return NULL;
133
134         memset(mem, 0, size); /* Clear the ram out, no junk to the user */
135         adr = (unsigned long) mem;
136         while (size > 0) {
137                 SetPageReserved(vmalloc_to_page((void *)adr));
138                 adr += PAGE_SIZE;
139                 size -= PAGE_SIZE;
140         }
141
142         return mem;
143 }
144
145 static void usbvision_rvfree(void *mem, unsigned long size)
146 {
147         unsigned long adr;
148
149         if (!mem)
150                 return;
151
152         size = PAGE_ALIGN(size);
153
154         adr = (unsigned long) mem;
155         while ((long) size > 0) {
156                 ClearPageReserved(vmalloc_to_page((void *)adr));
157                 adr += PAGE_SIZE;
158                 size -= PAGE_SIZE;
159         }
160
161         vfree(mem);
162 }
163
164
165 #if ENABLE_HEXDUMP
166 static void usbvision_hexdump(const unsigned char *data, int len)
167 {
168         char tmp[80];
169         int i, k;
170
171         for (i = k = 0; len > 0; i++, len--) {
172                 if (i > 0 && (i % 16 == 0)) {
173                         printk("%s\n", tmp);
174                         k = 0;
175                 }
176                 k += sprintf(&tmp[k], "%02x ", data[i]);
177         }
178         if (k > 0)
179                 printk("%s\n", tmp);
180 }
181 #endif
182
183 /********************************
184  * scratch ring buffer handling
185  ********************************/
186 static int scratch_len(struct usb_usbvision *usbvision)    /*This returns the amount of data actually in the buffer */
187 {
188         int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
189         if (len < 0) {
190                 len += scratch_buf_size;
191         }
192         PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
193
194         return len;
195 }
196
197
198 /* This returns the free space left in the buffer */
199 static int scratch_free(struct usb_usbvision *usbvision)
200 {
201         int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
202         if (free <= 0) {
203                 free += scratch_buf_size;
204         }
205         if (free) {
206                 free -= 1;                                                      /* at least one byte in the buffer must */
207                                                                                 /* left blank, otherwise there is no chance to differ between full and empty */
208         }
209         PDEBUG(DBG_SCRATCH, "return %d\n", free);
210
211         return free;
212 }
213
214
215 /* This puts data into the buffer */
216 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
217                        int len)
218 {
219         int len_part;
220
221         if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
222                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
223                 usbvision->scratch_write_ptr += len;
224         }
225         else {
226                 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
227                 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
228                 if (len == len_part) {
229                         usbvision->scratch_write_ptr = 0;                       /* just set write_ptr to zero */
230                 }
231                 else {
232                         memcpy(usbvision->scratch, data + len_part, len - len_part);
233                         usbvision->scratch_write_ptr = len - len_part;
234                 }
235         }
236
237         PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
238
239         return len;
240 }
241
242 /* This marks the write_ptr as position of new frame header */
243 static void scratch_mark_header(struct usb_usbvision *usbvision)
244 {
245         PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
246
247         usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
248                                 usbvision->scratch_write_ptr;
249         usbvision->scratch_headermarker_write_ptr += 1;
250         usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
251 }
252
253 /* This gets data from the buffer at the given "ptr" position */
254 static int scratch_get_extra(struct usb_usbvision *usbvision,
255                              unsigned char *data, int *ptr, int len)
256 {
257         int len_part;
258         if (*ptr + len < scratch_buf_size) {
259                 memcpy(data, usbvision->scratch + *ptr, len);
260                 *ptr += len;
261         }
262         else {
263                 len_part = scratch_buf_size - *ptr;
264                 memcpy(data, usbvision->scratch + *ptr, len_part);
265                 if (len == len_part) {
266                         *ptr = 0;                                                       /* just set the y_ptr to zero */
267                 }
268                 else {
269                         memcpy(data + len_part, usbvision->scratch, len - len_part);
270                         *ptr = len - len_part;
271                 }
272         }
273
274         PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
275
276         return len;
277 }
278
279
280 /* This sets the scratch extra read pointer */
281 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
282                                   int len)
283 {
284         *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
285
286         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
287 }
288
289
290 /*This increments the scratch extra read pointer */
291 static void scratch_inc_extra_ptr(int *ptr, int len)
292 {
293         *ptr = (*ptr + len) % scratch_buf_size;
294
295         PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
296 }
297
298
299 /* This gets data from the buffer */
300 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
301                        int len)
302 {
303         int len_part;
304         if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
305                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
306                 usbvision->scratch_read_ptr += len;
307         }
308         else {
309                 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
310                 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
311                 if (len == len_part) {
312                         usbvision->scratch_read_ptr = 0;                                /* just set the read_ptr to zero */
313                 }
314                 else {
315                         memcpy(data + len_part, usbvision->scratch, len - len_part);
316                         usbvision->scratch_read_ptr = len - len_part;
317                 }
318         }
319
320         PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
321
322         return len;
323 }
324
325
326 /* This sets read pointer to next header and returns it */
327 static int scratch_get_header(struct usb_usbvision *usbvision,
328                               struct usbvision_frame_header *header)
329 {
330         int errCode = 0;
331
332         PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
333
334         while (usbvision->scratch_headermarker_write_ptr -
335                 usbvision->scratch_headermarker_read_ptr != 0) {
336                 usbvision->scratch_read_ptr =
337                         usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
338                 usbvision->scratch_headermarker_read_ptr += 1;
339                 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
340                 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
341                 if ((header->magic_1 == USBVISION_MAGIC_1)
342                          && (header->magic_2 == USBVISION_MAGIC_2)
343                          && (header->headerLength == USBVISION_HEADER_LENGTH)) {
344                         errCode = USBVISION_HEADER_LENGTH;
345                         header->frameWidth  = header->frameWidthLo  + (header->frameWidthHi << 8);
346                         header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
347                         break;
348                 }
349         }
350
351         return errCode;
352 }
353
354
355 /*This removes len bytes of old data from the buffer */
356 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
357 {
358
359         usbvision->scratch_read_ptr += len;
360         usbvision->scratch_read_ptr %= scratch_buf_size;
361         PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
362 }
363
364
365 /*This resets the buffer - kills all data in it too */
366 static void scratch_reset(struct usb_usbvision *usbvision)
367 {
368         PDEBUG(DBG_SCRATCH, "\n");
369
370         usbvision->scratch_read_ptr = 0;
371         usbvision->scratch_write_ptr = 0;
372         usbvision->scratch_headermarker_read_ptr = 0;
373         usbvision->scratch_headermarker_write_ptr = 0;
374         usbvision->isocstate = IsocState_NoFrame;
375 }
376
377 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
378 {
379         usbvision->scratch = vmalloc_32(scratch_buf_size);
380         scratch_reset(usbvision);
381         if(usbvision->scratch == NULL) {
382                 dev_err(&usbvision->dev->dev,
383                         "%s: unable to allocate %d bytes for scratch\n",
384                                 __func__, scratch_buf_size);
385                 return -ENOMEM;
386         }
387         return 0;
388 }
389
390 void usbvision_scratch_free(struct usb_usbvision *usbvision)
391 {
392         vfree(usbvision->scratch);
393         usbvision->scratch = NULL;
394
395 }
396
397 /*
398  * usbvision_testpattern()
399  *
400  * Procedure forms a test pattern (yellow grid on blue background).
401  *
402  * Parameters:
403  * fullframe:   if TRUE then entire frame is filled, otherwise the procedure
404  *              continues from the current scanline.
405  * pmode        0: fill the frame with solid blue color (like on VCR or TV)
406  *              1: Draw a colored grid
407  *
408  */
409 static void usbvision_testpattern(struct usb_usbvision *usbvision,
410                                   int fullframe, int pmode)
411 {
412         static const char proc[] = "usbvision_testpattern";
413         struct usbvision_frame *frame;
414         unsigned char *f;
415         int num_cell = 0;
416         int scan_length = 0;
417         static int num_pass;
418
419         if (usbvision == NULL) {
420                 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
421                 return;
422         }
423         if (usbvision->curFrame == NULL) {
424                 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
425                 return;
426         }
427
428         /* Grab the current frame */
429         frame = usbvision->curFrame;
430
431         /* Optionally start at the beginning */
432         if (fullframe) {
433                 frame->curline = 0;
434                 frame->scanlength = 0;
435         }
436
437         /* Form every scan line */
438         for (; frame->curline < frame->frmheight; frame->curline++) {
439                 int i;
440
441                 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
442                 for (i = 0; i < usbvision->curwidth; i++) {
443                         unsigned char cb = 0x80;
444                         unsigned char cg = 0;
445                         unsigned char cr = 0;
446
447                         if (pmode == 1) {
448                                 if (frame->curline % 32 == 0)
449                                         cb = 0, cg = cr = 0xFF;
450                                 else if (i % 32 == 0) {
451                                         if (frame->curline % 32 == 1)
452                                                 num_cell++;
453                                         cb = 0, cg = cr = 0xFF;
454                                 } else {
455                                         cb =
456                                             ((num_cell * 7) +
457                                              num_pass) & 0xFF;
458                                         cg =
459                                             ((num_cell * 5) +
460                                              num_pass * 2) & 0xFF;
461                                         cr =
462                                             ((num_cell * 3) +
463                                              num_pass * 3) & 0xFF;
464                                 }
465                         } else {
466                                 /* Just the blue screen */
467                         }
468
469                         *f++ = cb;
470                         *f++ = cg;
471                         *f++ = cr;
472                         scan_length += 3;
473                 }
474         }
475
476         frame->grabstate = FrameState_Done;
477         frame->scanlength += scan_length;
478         ++num_pass;
479
480 }
481
482 /*
483  * usbvision_decompress_alloc()
484  *
485  * allocates intermediate buffer for decompression
486  */
487 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
488 {
489         int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
490         usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
491         if (usbvision->IntraFrameBuffer == NULL) {
492                 dev_err(&usbvision->dev->dev,
493                         "%s: unable to allocate %d for compr. frame buffer\n",
494                                 __func__, IFB_size);
495                 return -ENOMEM;
496         }
497         return 0;
498 }
499
500 /*
501  * usbvision_decompress_free()
502  *
503  * frees intermediate buffer for decompression
504  */
505 void usbvision_decompress_free(struct usb_usbvision *usbvision)
506 {
507         vfree(usbvision->IntraFrameBuffer);
508         usbvision->IntraFrameBuffer = NULL;
509
510 }
511
512 /************************************************************
513  * Here comes the data parsing stuff that is run as interrupt
514  ************************************************************/
515 /*
516  * usbvision_find_header()
517  *
518  * Locate one of supported header markers in the scratch buffer.
519  */
520 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
521 {
522         struct usbvision_frame *frame;
523         int foundHeader = 0;
524
525         frame = usbvision->curFrame;
526
527         while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
528                 // found header in scratch
529                 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
530                                 frame->isocHeader.magic_2,
531                                 frame->isocHeader.magic_1,
532                                 frame->isocHeader.headerLength,
533                                 frame->isocHeader.frameNum,
534                                 frame->isocHeader.framePhase,
535                                 frame->isocHeader.frameLatency,
536                                 frame->isocHeader.dataFormat,
537                                 frame->isocHeader.formatParam,
538                                 frame->isocHeader.frameWidth,
539                                 frame->isocHeader.frameHeight);
540
541                 if (usbvision->requestIntra) {
542                         if (frame->isocHeader.formatParam & 0x80) {
543                                 foundHeader = 1;
544                                 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
545                                 usbvision_unrequest_intra(usbvision);
546                                 break;
547                         }
548                 }
549                 else {
550                         foundHeader = 1;
551                         break;
552                 }
553         }
554
555         if (foundHeader) {
556                 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
557                 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
558                 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
559         }
560         else { // no header found
561                 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
562                 scratch_reset(usbvision);
563                 return ParseState_EndParse;
564         }
565
566         // found header
567         if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
568                 //check isocHeader.frameNum for lost frames
569                 if (usbvision->lastIsocFrameNum >= 0) {
570                         if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
571                                 // unexpected frame drop: need to request new intra frame
572                                 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
573                                 usbvision_request_intra(usbvision);
574                                 return ParseState_NextFrame;
575                         }
576                 }
577                 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
578         }
579         usbvision->header_count++;
580         frame->scanstate = ScanState_Lines;
581         frame->curline = 0;
582
583         if (force_testpattern) {
584                 usbvision_testpattern(usbvision, 1, 1);
585                 return ParseState_NextFrame;
586         }
587         return ParseState_Continue;
588 }
589
590 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
591                                            long *pcopylen)
592 {
593         volatile struct usbvision_frame *frame;
594         unsigned char *f;
595         int len;
596         int i;
597         unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
598         unsigned char rv, gv, bv;       // RGB components
599         int clipmask_index, bytes_per_pixel;
600         int stretch_bytes, clipmask_add;
601
602         frame  = usbvision->curFrame;
603         f = frame->data + (frame->v4l2_linesize * frame->curline);
604
605         /* Make sure there's enough data for the entire line */
606         len = (frame->isocHeader.frameWidth * 2)+5;
607         if (scratch_len(usbvision) < len) {
608                 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
609                 return ParseState_Out;
610         }
611
612         if ((frame->curline + 1) >= frame->frmheight) {
613                 return ParseState_NextFrame;
614         }
615
616         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
617         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
618         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
619         clipmask_add = usbvision->stretch_width;
620
621         for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
622
623                 scratch_get(usbvision, &yuyv[0], 4);
624
625                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
626                         *f++ = yuyv[0]; // Y
627                         *f++ = yuyv[3]; // U
628                 }
629                 else {
630
631                         YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
632                         switch (frame->v4l2_format.format) {
633                         case V4L2_PIX_FMT_RGB565:
634                                 *f++ = (0x1F & rv) |
635                                         (0xE0 & (gv << 5));
636                                 *f++ = (0x07 & (gv >> 3)) |
637                                         (0xF8 &  bv);
638                                 break;
639                         case V4L2_PIX_FMT_RGB24:
640                                 *f++ = rv;
641                                 *f++ = gv;
642                                 *f++ = bv;
643                                 break;
644                         case V4L2_PIX_FMT_RGB32:
645                                 *f++ = rv;
646                                 *f++ = gv;
647                                 *f++ = bv;
648                                 f++;
649                                 break;
650                         case V4L2_PIX_FMT_RGB555:
651                                 *f++ = (0x1F & rv) |
652                                         (0xE0 & (gv << 5));
653                                 *f++ = (0x03 & (gv >> 3)) |
654                                         (0x7C & (bv << 2));
655                                 break;
656                         }
657                 }
658                 clipmask_index += clipmask_add;
659                 f += stretch_bytes;
660
661                 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
662                         *f++ = yuyv[2]; // Y
663                         *f++ = yuyv[1]; // V
664                 }
665                 else {
666
667                         YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
668                         switch (frame->v4l2_format.format) {
669                         case V4L2_PIX_FMT_RGB565:
670                                 *f++ = (0x1F & rv) |
671                                         (0xE0 & (gv << 5));
672                                 *f++ = (0x07 & (gv >> 3)) |
673                                         (0xF8 &  bv);
674                                 break;
675                         case V4L2_PIX_FMT_RGB24:
676                                 *f++ = rv;
677                                 *f++ = gv;
678                                 *f++ = bv;
679                                 break;
680                         case V4L2_PIX_FMT_RGB32:
681                                 *f++ = rv;
682                                 *f++ = gv;
683                                 *f++ = bv;
684                                 f++;
685                                 break;
686                         case V4L2_PIX_FMT_RGB555:
687                                 *f++ = (0x1F & rv) |
688                                         (0xE0 & (gv << 5));
689                                 *f++ = (0x03 & (gv >> 3)) |
690                                         (0x7C & (bv << 2));
691                                 break;
692                         }
693                 }
694                 clipmask_index += clipmask_add;
695                 f += stretch_bytes;
696         }
697
698         frame->curline += usbvision->stretch_height;
699         *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
700
701         if (frame->curline >= frame->frmheight) {
702                 return ParseState_NextFrame;
703         }
704         else {
705                 return ParseState_Continue;
706         }
707 }
708
709 /* The decompression routine  */
710 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
711                                                                 unsigned char *Decompressed, int *StartPos,
712                                                                 int *BlockTypeStartPos, int Len)
713 {
714         int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
715         unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
716
717         Integrator = 0;
718         Pos = *StartPos;
719         BlockTypePos = *BlockTypeStartPos;
720         MaxPos = 396; //Pos + Len;
721         ExtraPos = Pos;
722         BlockLen = 0;
723         BlockByte = 0;
724         BlockCode = 0;
725         BlockType = 0;
726         BlockTypeByte = 0;
727         BlockTypeLen = 0;
728         RestPixel = Len;
729
730         for (Idx = 0; Idx < Len; Idx++) {
731
732                 if (BlockLen == 0) {
733                         if (BlockTypeLen==0) {
734                                 BlockTypeByte = Compressed[BlockTypePos];
735                                 BlockTypePos++;
736                                 BlockTypeLen = 4;
737                         }
738                         BlockType = (BlockTypeByte & 0xC0) >> 6;
739
740                         //statistic:
741                         usbvision->ComprBlockTypes[BlockType]++;
742
743                         Pos = ExtraPos;
744                         if (BlockType == 0) {
745                                 if(RestPixel >= 24) {
746                                         Idx += 23;
747                                         RestPixel -= 24;
748                                         Integrator = Decompressed[Idx];
749                                 } else {
750                                         Idx += RestPixel - 1;
751                                         RestPixel = 0;
752                                 }
753                         } else {
754                                 BlockCode = Compressed[Pos];
755                                 Pos++;
756                                 if (RestPixel >= 24) {
757                                         BlockLen  = 24;
758                                 } else {
759                                         BlockLen = RestPixel;
760                                 }
761                                 RestPixel -= BlockLen;
762                                 ExtraPos = Pos + (BlockLen / 4);
763                         }
764                         BlockTypeByte <<= 2;
765                         BlockTypeLen -= 1;
766                 }
767                 if (BlockLen > 0) {
768                         if ((BlockLen%4) == 0) {
769                                 BlockByte = Compressed[Pos];
770                                 Pos++;
771                         }
772                         if (BlockType == 1) { //inter Block
773                                 Integrator = Decompressed[Idx];
774                         }
775                         switch (BlockByte & 0xC0) {
776                                 case 0x03<<6:
777                                         Integrator += Compressed[ExtraPos];
778                                         ExtraPos++;
779                                         break;
780                                 case 0x02<<6:
781                                         Integrator += BlockCode;
782                                         break;
783                                 case 0x00:
784                                         Integrator -= BlockCode;
785                                         break;
786                         }
787                         Decompressed[Idx] = Integrator;
788                         BlockByte <<= 2;
789                         BlockLen -= 1;
790                 }
791         }
792         *StartPos = ExtraPos;
793         *BlockTypeStartPos = BlockTypePos;
794         return Idx;
795 }
796
797
798 /*
799  * usbvision_parse_compress()
800  *
801  * Parse compressed frame from the scratch buffer, put
802  * decoded RGB value into the current frame buffer and add the written
803  * number of bytes (RGB) to the *pcopylen.
804  *
805  */
806 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
807                                            long *pcopylen)
808 {
809 #define USBVISION_STRIP_MAGIC           0x5A
810 #define USBVISION_STRIP_LEN_MAX         400
811 #define USBVISION_STRIP_HEADER_LEN      3
812
813         struct usbvision_frame *frame;
814         unsigned char *f,*u = NULL ,*v = NULL;
815         unsigned char StripData[USBVISION_STRIP_LEN_MAX];
816         unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
817         int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
818         int clipmask_index, bytes_per_pixel, rc;
819         int imageSize;
820         unsigned char rv, gv, bv;
821         static unsigned char *Y, *U, *V;
822
823         frame  = usbvision->curFrame;
824         imageSize = frame->frmwidth * frame->frmheight;
825         if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
826              (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) {       // this is a planar format
827                 //... v4l2_linesize not used here.
828                 f = frame->data + (frame->width * frame->curline);
829         } else
830                 f = frame->data + (frame->v4l2_linesize * frame->curline);
831
832         if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
833                 // get base of u and b planes add halfoffset
834
835                 u = frame->data
836                         + imageSize
837                         + (frame->frmwidth >>1) * frame->curline ;
838                 v = u + (imageSize >>1 );
839
840         } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
841
842                 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
843                 u = v + (imageSize >>2) ;
844         }
845
846         if (frame->curline == 0) {
847                 usbvision_adjust_compression(usbvision);
848         }
849
850         if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
851                 return ParseState_Out;
852         }
853
854         //get strip header without changing the scratch_read_ptr
855         scratch_set_extra_ptr(usbvision, &StripPtr, 0);
856         scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
857                                 USBVISION_STRIP_HEADER_LEN);
858
859         if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
860                 // wrong strip magic
861                 usbvision->stripMagicErrors++;
862                 return ParseState_NextFrame;
863         }
864
865         if (frame->curline != (int)StripHeader[2]) {
866                 //line number missmatch error
867                 usbvision->stripLineNumberErrors++;
868         }
869
870         StripLen = 2 * (unsigned int)StripHeader[1];
871         if (StripLen > USBVISION_STRIP_LEN_MAX) {
872                 // strip overrun
873                 // I think this never happens
874                 usbvision_request_intra(usbvision);
875         }
876
877         if (scratch_len(usbvision) < StripLen) {
878                 //there is not enough data for the strip
879                 return ParseState_Out;
880         }
881
882         if (usbvision->IntraFrameBuffer) {
883                 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
884                 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
885                 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
886         }
887         else {
888                 return ParseState_NextFrame;
889         }
890
891         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
892         clipmask_index = frame->curline * MAX_FRAME_WIDTH;
893
894         scratch_get(usbvision, StripData, StripLen);
895
896         IdxEnd = frame->frmwidth;
897         BlockTypePos = USBVISION_STRIP_HEADER_LEN;
898         StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
899         BlockPos = StartBlockPos;
900
901         usbvision->BlockPos = BlockPos;
902
903         if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
904                 //return ParseState_Continue;
905         }
906         if (StripLen > usbvision->maxStripLen) {
907                 usbvision->maxStripLen = StripLen;
908         }
909
910         if (frame->curline%2) {
911                 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
912                 //return ParseState_Continue;
913                 }
914         }
915         else {
916                 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
917                         //return ParseState_Continue;
918                 }
919         }
920
921         if (BlockPos > usbvision->comprBlockPos) {
922                 usbvision->comprBlockPos = BlockPos;
923         }
924         if (BlockPos > StripLen) {
925                 usbvision->stripLenErrors++;
926         }
927
928         for (Idx = 0; Idx < IdxEnd; Idx++) {
929                 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
930                         *f++ = Y[Idx];
931                         *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
932                 }
933                 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
934                         *f++ = Y[Idx];
935                         if ( Idx & 0x01)
936                                 *u++ = U[Idx>>1] ;
937                         else
938                                 *v++ = V[Idx>>1];
939                 }
940                 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
941                         *f++ = Y [Idx];
942                         if ( !((  Idx & 0x01  ) | (  frame->curline & 0x01  )) ){
943
944 /*                               only need do this for 1 in 4 pixels */
945 /*                               intraframe buffer is YUV420 format */
946
947                                 *u++ = U[Idx >>1];
948                                 *v++ = V[Idx >>1];
949                         }
950
951                 }
952                 else {
953                         YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
954                         switch (frame->v4l2_format.format) {
955                                 case V4L2_PIX_FMT_GREY:
956                                         *f++ = Y[Idx];
957                                         break;
958                                 case V4L2_PIX_FMT_RGB555:
959                                         *f++ = (0x1F & rv) |
960                                                 (0xE0 & (gv << 5));
961                                         *f++ = (0x03 & (gv >> 3)) |
962                                                 (0x7C & (bv << 2));
963                                         break;
964                                 case V4L2_PIX_FMT_RGB565:
965                                         *f++ = (0x1F & rv) |
966                                                 (0xE0 & (gv << 5));
967                                         *f++ = (0x07 & (gv >> 3)) |
968                                                 (0xF8 &  bv);
969                                         break;
970                                 case V4L2_PIX_FMT_RGB24:
971                                         *f++ = rv;
972                                         *f++ = gv;
973                                         *f++ = bv;
974                                         break;
975                                 case V4L2_PIX_FMT_RGB32:
976                                         *f++ = rv;
977                                         *f++ = gv;
978                                         *f++ = bv;
979                                         f++;
980                                         break;
981                         }
982                 }
983                 clipmask_index++;
984         }
985         /* Deal with non-integer no. of bytes for YUV420P */
986         if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
987                 *pcopylen += frame->v4l2_linesize;
988         else
989                 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
990
991         frame->curline += 1;
992
993         if (frame->curline >= frame->frmheight) {
994                 return ParseState_NextFrame;
995         }
996         else {
997                 return ParseState_Continue;
998         }
999
1000 }
1001
1002
1003 /*
1004  * usbvision_parse_lines_420()
1005  *
1006  * Parse two lines from the scratch buffer, put
1007  * decoded RGB value into the current frame buffer and add the written
1008  * number of bytes (RGB) to the *pcopylen.
1009  *
1010  */
1011 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
1012                                            long *pcopylen)
1013 {
1014         struct usbvision_frame *frame;
1015         unsigned char *f_even = NULL, *f_odd = NULL;
1016         unsigned int pixel_per_line, block;
1017         int pixel, block_split;
1018         int y_ptr, u_ptr, v_ptr, y_odd_offset;
1019         const int   y_block_size = 128;
1020         const int  uv_block_size = 64;
1021         const int sub_block_size = 32;
1022         const int y_step[] = { 0, 0, 0, 2 },  y_step_size = 4;
1023         const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1024         unsigned char y[2], u, v;       /* YUV components */
1025         int y_, u_, v_, vb, uvg, ur;
1026         int r_, g_, b_;                 /* RGB components */
1027         unsigned char g;
1028         int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1029         int clipmask_add, stretch_bytes;
1030
1031         frame  = usbvision->curFrame;
1032         f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1033         f_odd  = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1034
1035         /* Make sure there's enough data for the entire line */
1036         /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1037         /* I need two lines to decode the color */
1038         bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1039         stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1040         clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1041         clipmask_odd_index  = clipmask_even_index + MAX_FRAME_WIDTH;
1042         clipmask_add = usbvision->stretch_width;
1043         pixel_per_line = frame->isocHeader.frameWidth;
1044
1045         if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1046                 //printk(KERN_DEBUG "out of data, need %d\n", len);
1047                 return ParseState_Out;
1048         }
1049
1050         if ((frame->curline + 1) >= frame->frmheight) {
1051                 return ParseState_NextFrame;
1052         }
1053
1054         block_split = (pixel_per_line%y_block_size) ? 1 : 0;    //are some blocks splitted into different lines?
1055
1056         y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1057                         + block_split * uv_block_size;
1058
1059         scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1060         scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1061         scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1062                         + (4 - block_split) * sub_block_size);
1063
1064         for (block = 0; block < (pixel_per_line / sub_block_size);
1065              block++) {
1066
1067
1068                 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1069                         scratch_get(usbvision, &y[0], 2);
1070                         scratch_get_extra(usbvision, &u, &u_ptr, 1);
1071                         scratch_get_extra(usbvision, &v, &v_ptr, 1);
1072
1073                         //I don't use the YUV_TO_RGB macro for better performance
1074                         v_ = v - 128;
1075                         u_ = u - 128;
1076                         vb =              132252 * v_;
1077                         uvg= -53281 * u_ - 25625 * v_;
1078                         ur = 104595 * u_;
1079
1080                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1081                                 *f_even++ = y[0];
1082                                 *f_even++ = v;
1083                         }
1084                         else {
1085                                 y_ = 76284 * (y[0] - 16);
1086
1087                                 b_ = (y_ + vb) >> 16;
1088                                 g_ = (y_ + uvg)>> 16;
1089                                 r_ = (y_ + ur) >> 16;
1090
1091                                 switch (frame->v4l2_format.format) {
1092                                 case V4L2_PIX_FMT_RGB565:
1093                                         g = LIMIT_RGB(g_);
1094                                         *f_even++ =
1095                                                 (0x1F & LIMIT_RGB(r_)) |
1096                                                 (0xE0 & (g << 5));
1097                                         *f_even++ =
1098                                                 (0x07 & (g >> 3)) |
1099                                                 (0xF8 &  LIMIT_RGB(b_));
1100                                         break;
1101                                 case V4L2_PIX_FMT_RGB24:
1102                                         *f_even++ = LIMIT_RGB(r_);
1103                                         *f_even++ = LIMIT_RGB(g_);
1104                                         *f_even++ = LIMIT_RGB(b_);
1105                                         break;
1106                                 case V4L2_PIX_FMT_RGB32:
1107                                         *f_even++ = LIMIT_RGB(r_);
1108                                         *f_even++ = LIMIT_RGB(g_);
1109                                         *f_even++ = LIMIT_RGB(b_);
1110                                         f_even++;
1111                                         break;
1112                                 case V4L2_PIX_FMT_RGB555:
1113                                         g = LIMIT_RGB(g_);
1114                                         *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1115                                                 (0xE0 & (g << 5));
1116                                         *f_even++ = (0x03 & (g >> 3)) |
1117                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1118                                         break;
1119                                 }
1120                         }
1121                         clipmask_even_index += clipmask_add;
1122                         f_even += stretch_bytes;
1123
1124                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1125                                 *f_even++ = y[1];
1126                                 *f_even++ = u;
1127                         }
1128                         else {
1129                                 y_ = 76284 * (y[1] - 16);
1130
1131                                 b_ = (y_ + vb) >> 16;
1132                                 g_ = (y_ + uvg)>> 16;
1133                                 r_ = (y_ + ur) >> 16;
1134
1135                                 switch (frame->v4l2_format.format) {
1136                                 case V4L2_PIX_FMT_RGB565:
1137                                         g = LIMIT_RGB(g_);
1138                                         *f_even++ =
1139                                                 (0x1F & LIMIT_RGB(r_)) |
1140                                                 (0xE0 & (g << 5));
1141                                         *f_even++ =
1142                                                 (0x07 & (g >> 3)) |
1143                                                 (0xF8 &  LIMIT_RGB(b_));
1144                                         break;
1145                                 case V4L2_PIX_FMT_RGB24:
1146                                         *f_even++ = LIMIT_RGB(r_);
1147                                         *f_even++ = LIMIT_RGB(g_);
1148                                         *f_even++ = LIMIT_RGB(b_);
1149                                         break;
1150                                 case V4L2_PIX_FMT_RGB32:
1151                                         *f_even++ = LIMIT_RGB(r_);
1152                                         *f_even++ = LIMIT_RGB(g_);
1153                                         *f_even++ = LIMIT_RGB(b_);
1154                                         f_even++;
1155                                         break;
1156                                 case V4L2_PIX_FMT_RGB555:
1157                                         g = LIMIT_RGB(g_);
1158                                         *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1159                                                 (0xE0 & (g << 5));
1160                                         *f_even++ = (0x03 & (g >> 3)) |
1161                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1162                                         break;
1163                                 }
1164                         }
1165                         clipmask_even_index += clipmask_add;
1166                         f_even += stretch_bytes;
1167
1168                         scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1169
1170                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1171                                 *f_odd++ = y[0];
1172                                 *f_odd++ = v;
1173                         }
1174                         else {
1175                                 y_ = 76284 * (y[0] - 16);
1176
1177                                 b_ = (y_ + vb) >> 16;
1178                                 g_ = (y_ + uvg)>> 16;
1179                                 r_ = (y_ + ur) >> 16;
1180
1181                                 switch (frame->v4l2_format.format) {
1182                                 case V4L2_PIX_FMT_RGB565:
1183                                         g = LIMIT_RGB(g_);
1184                                         *f_odd++ =
1185                                                 (0x1F & LIMIT_RGB(r_)) |
1186                                                 (0xE0 & (g << 5));
1187                                         *f_odd++ =
1188                                                 (0x07 & (g >> 3)) |
1189                                                 (0xF8 &  LIMIT_RGB(b_));
1190                                         break;
1191                                 case V4L2_PIX_FMT_RGB24:
1192                                         *f_odd++ = LIMIT_RGB(r_);
1193                                         *f_odd++ = LIMIT_RGB(g_);
1194                                         *f_odd++ = LIMIT_RGB(b_);
1195                                         break;
1196                                 case V4L2_PIX_FMT_RGB32:
1197                                         *f_odd++ = LIMIT_RGB(r_);
1198                                         *f_odd++ = LIMIT_RGB(g_);
1199                                         *f_odd++ = LIMIT_RGB(b_);
1200                                         f_odd++;
1201                                         break;
1202                                 case V4L2_PIX_FMT_RGB555:
1203                                         g = LIMIT_RGB(g_);
1204                                         *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1205                                                 (0xE0 & (g << 5));
1206                                         *f_odd++ = (0x03 & (g >> 3)) |
1207                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1208                                         break;
1209                                 }
1210                         }
1211                         clipmask_odd_index += clipmask_add;
1212                         f_odd += stretch_bytes;
1213
1214                         if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1215                                 *f_odd++ = y[1];
1216                                 *f_odd++ = u;
1217                         }
1218                         else {
1219                                 y_ = 76284 * (y[1] - 16);
1220
1221                                 b_ = (y_ + vb) >> 16;
1222                                 g_ = (y_ + uvg)>> 16;
1223                                 r_ = (y_ + ur) >> 16;
1224
1225                                 switch (frame->v4l2_format.format) {
1226                                 case V4L2_PIX_FMT_RGB565:
1227                                         g = LIMIT_RGB(g_);
1228                                         *f_odd++ =
1229                                                 (0x1F & LIMIT_RGB(r_)) |
1230                                                 (0xE0 & (g << 5));
1231                                         *f_odd++ =
1232                                                 (0x07 & (g >> 3)) |
1233                                                 (0xF8 &  LIMIT_RGB(b_));
1234                                         break;
1235                                 case V4L2_PIX_FMT_RGB24:
1236                                         *f_odd++ = LIMIT_RGB(r_);
1237                                         *f_odd++ = LIMIT_RGB(g_);
1238                                         *f_odd++ = LIMIT_RGB(b_);
1239                                         break;
1240                                 case V4L2_PIX_FMT_RGB32:
1241                                         *f_odd++ = LIMIT_RGB(r_);
1242                                         *f_odd++ = LIMIT_RGB(g_);
1243                                         *f_odd++ = LIMIT_RGB(b_);
1244                                         f_odd++;
1245                                         break;
1246                                 case V4L2_PIX_FMT_RGB555:
1247                                         g = LIMIT_RGB(g_);
1248                                         *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1249                                                 (0xE0 & (g << 5));
1250                                         *f_odd++ = (0x03 & (g >> 3)) |
1251                                                 (0x7C & (LIMIT_RGB(b_) << 2));
1252                                         break;
1253                                 }
1254                         }
1255                         clipmask_odd_index += clipmask_add;
1256                         f_odd += stretch_bytes;
1257                 }
1258
1259                 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1260                 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1261                                 * sub_block_size);
1262                 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1263                                 * sub_block_size);
1264                 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1265                                 * sub_block_size);
1266         }
1267
1268         scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1269                         + block_split * sub_block_size);
1270
1271         frame->curline += 2 * usbvision->stretch_height;
1272         *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1273
1274         if (frame->curline >= frame->frmheight)
1275                 return ParseState_NextFrame;
1276         else
1277                 return ParseState_Continue;
1278 }
1279
1280 /*
1281  * usbvision_parse_data()
1282  *
1283  * Generic routine to parse the scratch buffer. It employs either
1284  * usbvision_find_header() or usbvision_parse_lines() to do most
1285  * of work.
1286  *
1287  */
1288 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1289 {
1290         struct usbvision_frame *frame;
1291         enum ParseState newstate;
1292         long copylen = 0;
1293         unsigned long lock_flags;
1294
1295         frame = usbvision->curFrame;
1296
1297         PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1298
1299         while (1) {
1300
1301                 newstate = ParseState_Out;
1302                 if (scratch_len(usbvision)) {
1303                         if (frame->scanstate == ScanState_Scanning) {
1304                                 newstate = usbvision_find_header(usbvision);
1305                         }
1306                         else if (frame->scanstate == ScanState_Lines) {
1307                                 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1308                                         newstate = usbvision_parse_lines_420(usbvision, &copylen);
1309                                 }
1310                                 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1311                                         newstate = usbvision_parse_lines_422(usbvision, &copylen);
1312                                 }
1313                                 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1314                                         newstate = usbvision_parse_compress(usbvision, &copylen);
1315                                 }
1316
1317                         }
1318                 }
1319                 if (newstate == ParseState_Continue) {
1320                         continue;
1321                 }
1322                 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1323                         break;
1324                 }
1325                 else {
1326                         return; /* ParseState_EndParse */
1327                 }
1328         }
1329
1330         if (newstate == ParseState_NextFrame) {
1331                 frame->grabstate = FrameState_Done;
1332                 do_gettimeofday(&(frame->timestamp));
1333                 frame->sequence = usbvision->frame_num;
1334
1335                 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1336                 list_move_tail(&(frame->frame), &usbvision->outqueue);
1337                 usbvision->curFrame = NULL;
1338                 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1339
1340                 usbvision->frame_num++;
1341
1342                 /* This will cause the process to request another frame. */
1343                 if (waitqueue_active(&usbvision->wait_frame)) {
1344                         PDEBUG(DBG_PARSE, "Wake up !");
1345                         wake_up_interruptible(&usbvision->wait_frame);
1346                 }
1347         }
1348         else
1349                 frame->grabstate = FrameState_Grabbing;
1350
1351
1352         /* Update the frame's uncompressed length. */
1353         frame->scanlength += copylen;
1354 }
1355
1356
1357 /*
1358  * Make all of the blocks of data contiguous
1359  */
1360 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1361                                           struct urb *urb)
1362 {
1363         unsigned char *packet_data;
1364         int i, totlen = 0;
1365
1366         for (i = 0; i < urb->number_of_packets; i++) {
1367                 int packet_len = urb->iso_frame_desc[i].actual_length;
1368                 int packet_stat = urb->iso_frame_desc[i].status;
1369
1370                 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1371
1372                 /* Detect and ignore errored packets */
1373                 if (packet_stat) {      // packet_stat != 0 ?????????????
1374                         PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1375                         usbvision->isocErrCount++;
1376                         continue;
1377                 }
1378
1379                 /* Detect and ignore empty packets */
1380                 if (packet_len < 0) {
1381                         PDEBUG(DBG_ISOC, "error packet [%d]", i);
1382                         usbvision->isocSkipCount++;
1383                         continue;
1384                 }
1385                 else if (packet_len == 0) {     /* Frame end ????? */
1386                         PDEBUG(DBG_ISOC, "null packet [%d]", i);
1387                         usbvision->isocstate=IsocState_NoFrame;
1388                         usbvision->isocSkipCount++;
1389                         continue;
1390                 }
1391                 else if (packet_len > usbvision->isocPacketSize) {
1392                         PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1393                         usbvision->isocSkipCount++;
1394                         continue;
1395                 }
1396
1397                 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1398
1399                 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1400                         usbvision->isocstate=IsocState_InFrame;
1401                         scratch_mark_header(usbvision);
1402                         usbvision_measure_bandwidth(usbvision);
1403                         PDEBUG(DBG_ISOC, "packet with header");
1404                 }
1405
1406                 /*
1407                  * If usbvision continues to feed us with data but there is no
1408                  * consumption (if, for example, V4L client fell asleep) we
1409                  * may overflow the buffer. We have to move old data over to
1410                  * free room for new data. This is bad for old data. If we
1411                  * just drop new data then it's bad for new data... choose
1412                  * your favorite evil here.
1413                  */
1414                 if (scratch_free(usbvision) < packet_len) {
1415
1416                         usbvision->scratch_ovf_count++;
1417                         PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1418                                scratch_len(usbvision), packet_len);
1419                         scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1420                 }
1421
1422                 /* Now we know that there is enough room in scratch buffer */
1423                 scratch_put(usbvision, packet_data, packet_len);
1424                 totlen += packet_len;
1425                 usbvision->isocDataCount += packet_len;
1426                 usbvision->isocPacketCount++;
1427         }
1428 #if ENABLE_HEXDUMP
1429         if (totlen > 0) {
1430                 static int foo;
1431                 if (foo < 1) {
1432                         printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1433                         usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1434                         ++foo;
1435                 }
1436         }
1437 #endif
1438  return totlen;
1439 }
1440
1441 static void usbvision_isocIrq(struct urb *urb)
1442 {
1443         int errCode = 0;
1444         int len;
1445         struct usb_usbvision *usbvision = urb->context;
1446         int i;
1447         unsigned long startTime = jiffies;
1448         struct usbvision_frame **f;
1449
1450         /* We don't want to do anything if we are about to be removed! */
1451         if (!USBVISION_IS_OPERATIONAL(usbvision))
1452                 return;
1453
1454         /* any urb with wrong status is ignored without acknowledgement */
1455         if (urb->status == -ENOENT) {
1456                 return;
1457         }
1458
1459         f = &usbvision->curFrame;
1460
1461         /* Manage streaming interruption */
1462         if (usbvision->streaming == Stream_Interrupt) {
1463                 usbvision->streaming = Stream_Idle;
1464                 if ((*f)) {
1465                         (*f)->grabstate = FrameState_Ready;
1466                         (*f)->scanstate = ScanState_Scanning;
1467                 }
1468                 PDEBUG(DBG_IRQ, "stream interrupted");
1469                 wake_up_interruptible(&usbvision->wait_stream);
1470         }
1471
1472         /* Copy the data received into our scratch buffer */
1473         len = usbvision_compress_isochronous(usbvision, urb);
1474
1475         usbvision->isocUrbCount++;
1476         usbvision->urb_length = len;
1477
1478         if (usbvision->streaming == Stream_On) {
1479
1480                 /* If we collected enough data let's parse! */
1481                 if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) &&
1482                     (!list_empty(&(usbvision->inqueue))) ) {
1483                         if (!(*f)) {
1484                                 (*f) = list_entry(usbvision->inqueue.next,
1485                                                   struct usbvision_frame,
1486                                                   frame);
1487                         }
1488                         usbvision_parse_data(usbvision);
1489                 }
1490                 else {
1491                         /*If we don't have a frame
1492                           we're current working on, complain */
1493                         PDEBUG(DBG_IRQ,
1494                                "received data, but no one needs it");
1495                         scratch_reset(usbvision);
1496                 }
1497         }
1498         else {
1499                 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1500                 scratch_reset(usbvision);
1501         }
1502
1503         usbvision->timeInIrq += jiffies - startTime;
1504
1505         for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1506                 urb->iso_frame_desc[i].status = 0;
1507                 urb->iso_frame_desc[i].actual_length = 0;
1508         }
1509
1510         urb->status = 0;
1511         urb->dev = usbvision->dev;
1512         errCode = usb_submit_urb (urb, GFP_ATOMIC);
1513
1514         if(errCode) {
1515                 dev_err(&usbvision->dev->dev,
1516                         "%s: usb_submit_urb failed: error %d\n",
1517                                 __func__, errCode);
1518         }
1519
1520         return;
1521 }
1522
1523 /*************************************/
1524 /* Low level usbvision access functions */
1525 /*************************************/
1526
1527 /*
1528  * usbvision_read_reg()
1529  *
1530  * return  < 0 -> Error
1531  *        >= 0 -> Data
1532  */
1533
1534 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1535 {
1536         int errCode = 0;
1537         unsigned char buffer[1];
1538
1539         if (!USBVISION_IS_OPERATIONAL(usbvision))
1540                 return -1;
1541
1542         errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1543                                 USBVISION_OP_CODE,
1544                                 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1545                                 0, (__u16) reg, buffer, 1, HZ);
1546
1547         if (errCode < 0) {
1548                 dev_err(&usbvision->dev->dev,
1549                         "%s: failed: error %d\n", __func__, errCode);
1550                 return errCode;
1551         }
1552         return buffer[0];
1553 }
1554
1555 /*
1556  * usbvision_write_reg()
1557  *
1558  * return 1 -> Reg written
1559  *        0 -> usbvision is not yet ready
1560  *       -1 -> Something went wrong
1561  */
1562
1563 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1564                             unsigned char value)
1565 {
1566         int errCode = 0;
1567
1568         if (!USBVISION_IS_OPERATIONAL(usbvision))
1569                 return 0;
1570
1571         errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1572                                 USBVISION_OP_CODE,
1573                                 USB_DIR_OUT | USB_TYPE_VENDOR |
1574                                 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1575
1576         if (errCode < 0) {
1577                 dev_err(&usbvision->dev->dev,
1578                         "%s: failed: error %d\n", __func__, errCode);
1579         }
1580         return errCode;
1581 }
1582
1583
1584 static void usbvision_ctrlUrb_complete(struct urb *urb)
1585 {
1586         struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1587
1588         PDEBUG(DBG_IRQ, "");
1589         usbvision->ctrlUrbBusy = 0;
1590         if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1591                 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1592         }
1593 }
1594
1595
1596 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1597                                                                         unsigned char *data, int len)
1598 {
1599         int errCode = 0;
1600
1601         PDEBUG(DBG_IRQ, "");
1602         if (len > 8) {
1603                 return -EFAULT;
1604         }
1605         if (usbvision->ctrlUrbBusy) {
1606                 return -EBUSY;
1607         }
1608         usbvision->ctrlUrbBusy = 1;
1609
1610         usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1611         usbvision->ctrlUrbSetup.bRequest     = USBVISION_OP_CODE;
1612         usbvision->ctrlUrbSetup.wValue       = 0;
1613         usbvision->ctrlUrbSetup.wIndex       = cpu_to_le16(address);
1614         usbvision->ctrlUrbSetup.wLength      = cpu_to_le16(len);
1615         usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1616                                                         usb_sndctrlpipe(usbvision->dev, 1),
1617                                                         (unsigned char *)&usbvision->ctrlUrbSetup,
1618                                                         (void *)usbvision->ctrlUrbBuffer, len,
1619                                                         usbvision_ctrlUrb_complete,
1620                                                         (void *)usbvision);
1621
1622         memcpy(usbvision->ctrlUrbBuffer, data, len);
1623
1624         errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1625         if (errCode < 0) {
1626                 // error in usb_submit_urb()
1627                 usbvision->ctrlUrbBusy = 0;
1628         }
1629         PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1630         return errCode;
1631 }
1632
1633
1634 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1635 {
1636         int errCode = 0;
1637
1638         usbvision->lastIsocFrameNum = -1;
1639         usbvision->isocDataCount = 0;
1640         usbvision->isocPacketCount = 0;
1641         usbvision->isocSkipCount = 0;
1642         usbvision->comprLevel = 50;
1643         usbvision->lastComprLevel = -1;
1644         usbvision->isocUrbCount = 0;
1645         usbvision->requestIntra = 1;
1646         usbvision->isocMeasureBandwidthCount = 0;
1647
1648         return errCode;
1649 }
1650
1651 /* this function measures the used bandwidth since last call
1652  * return:    0 : no error
1653  * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1654  */
1655 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1656 {
1657         int errCode = 0;
1658
1659         if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1660                 usbvision->isocMeasureBandwidthCount++;
1661                 return errCode;
1662         }
1663         if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1664                 usbvision->usedBandwidth = usbvision->isocDataCount /
1665                                         (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1666                                         100 / usbvision->isocPacketSize;
1667         }
1668         usbvision->isocMeasureBandwidthCount = 0;
1669         usbvision->isocDataCount = 0;
1670         usbvision->isocPacketCount = 0;
1671         usbvision->isocSkipCount = 0;
1672         return errCode;
1673 }
1674
1675 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1676 {
1677         int errCode = 0;
1678         unsigned char buffer[6];
1679
1680         PDEBUG(DBG_IRQ, "");
1681         if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1682                 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1683                 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1684                 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1685                         int distorsion;
1686                         if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1687                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM Threshold 1
1688                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM Threshold 2
1689                                 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1690                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (inter)
1691                                 buffer[3] = (unsigned char)(distorsion & 0xFF);                         // Average distorsion Threshold (intra)
1692                                 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1693                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (inter)
1694                                 buffer[5] = (unsigned char)(distorsion & 0xFF);                         // Maximum distorsion Threshold (intra)
1695                         }
1696                         else { //BRIDGE_NT1003
1697                                 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100);      // PCM threshold 1
1698                                 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100);       // PCM threshold 2
1699                                 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1700                                 buffer[2] = (unsigned char)(distorsion & 0xFF);                         // distorsion threshold bit0-7
1701                                 buffer[3] = 0;  //(unsigned char)((distorsion >> 8) & 0x0F);            // distorsion threshold bit 8-11
1702                                 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1703                                 buffer[4] = (unsigned char)(distorsion & 0xFF);                         // maximum distorsion bit0-7
1704                                 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01);             // maximum distorsion bit 8
1705                         }
1706                         errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1707                         if (errCode == 0){
1708                                 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1709                                                                 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1710                                 usbvision->lastComprLevel = usbvision->comprLevel;
1711                         }
1712                 }
1713         }
1714         return errCode;
1715 }
1716
1717 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1718 {
1719         int errCode = 0;
1720         unsigned char buffer[1];
1721
1722         PDEBUG(DBG_IRQ, "");
1723         usbvision->requestIntra = 1;
1724         buffer[0] = 1;
1725         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1726         return errCode;
1727 }
1728
1729 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1730 {
1731         int errCode = 0;
1732         unsigned char buffer[1];
1733
1734         PDEBUG(DBG_IRQ, "");
1735         usbvision->requestIntra = 0;
1736         buffer[0] = 0;
1737         usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1738         return errCode;
1739 }
1740
1741 /*******************************
1742  * usbvision utility functions
1743  *******************************/
1744
1745 int usbvision_power_off(struct usb_usbvision *usbvision)
1746 {
1747         int errCode = 0;
1748
1749         PDEBUG(DBG_FUNC, "");
1750
1751         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1752         if (errCode == 1) {
1753                 usbvision->power = 0;
1754         }
1755         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1756         return errCode;
1757 }
1758
1759 /*
1760  * usbvision_set_video_format()
1761  *
1762  */
1763 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1764 {
1765         static const char proc[] = "usbvision_set_video_format";
1766         int rc;
1767         unsigned char value[2];
1768
1769         if (!USBVISION_IS_OPERATIONAL(usbvision))
1770                 return 0;
1771
1772         PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1773
1774         if ((format != ISOC_MODE_YUV422)
1775             && (format != ISOC_MODE_YUV420)
1776             && (format != ISOC_MODE_COMPRESS)) {
1777                 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1778                        format);
1779                 format = ISOC_MODE_YUV420;
1780         }
1781         value[0] = 0x0A;  //TODO: See the effect of the filter
1782         value[1] = format; // Sets the VO_MODE register which follows FILT_CONT
1783         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1784                              USBVISION_OP_CODE,
1785                              USB_DIR_OUT | USB_TYPE_VENDOR |
1786                              USB_RECIP_ENDPOINT, 0,
1787                              (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1788
1789         if (rc < 0) {
1790                 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1791                        "reconnect or reload driver.\n", proc, rc);
1792         }
1793         usbvision->isocMode = format;
1794         return rc;
1795 }
1796
1797 /*
1798  * usbvision_set_output()
1799  *
1800  */
1801
1802 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1803                          int height)
1804 {
1805         int errCode = 0;
1806         int UsbWidth, UsbHeight;
1807         unsigned int frameRate=0, frameDrop=0;
1808         unsigned char value[4];
1809
1810         if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1811                 return 0;
1812         }
1813
1814         if (width > MAX_USB_WIDTH) {
1815                 UsbWidth = width / 2;
1816                 usbvision->stretch_width = 2;
1817         }
1818         else {
1819                 UsbWidth = width;
1820                 usbvision->stretch_width = 1;
1821         }
1822
1823         if (height > MAX_USB_HEIGHT) {
1824                 UsbHeight = height / 2;
1825                 usbvision->stretch_height = 2;
1826         }
1827         else {
1828                 UsbHeight = height;
1829                 usbvision->stretch_height = 1;
1830         }
1831
1832         RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1833         UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1834         RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1835         UsbHeight &= ~(1);
1836
1837         PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1838                                                 UsbWidth, UsbHeight, width, height,
1839                                                 usbvision->stretch_width, usbvision->stretch_height);
1840
1841         /* I'll not rewrite the same values */
1842         if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1843                 value[0] = UsbWidth & 0xff;             //LSB
1844                 value[1] = (UsbWidth >> 8) & 0x03;      //MSB
1845                 value[2] = UsbHeight & 0xff;            //LSB
1846                 value[3] = (UsbHeight >> 8) & 0x03;     //MSB
1847
1848                 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1849                              USBVISION_OP_CODE,
1850                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1851                                  0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1852
1853                 if (errCode < 0) {
1854                         dev_err(&usbvision->dev->dev,
1855                                 "%s failed: error %d\n", __func__, errCode);
1856                         return errCode;
1857                 }
1858                 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1859                 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1860         }
1861
1862         if (usbvision->isocMode == ISOC_MODE_YUV422) {
1863                 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1864         }
1865         else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1866                 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1867         }
1868         else {
1869                 frameRate = FRAMERATE_MAX;
1870         }
1871
1872         if (usbvision->tvnormId & V4L2_STD_625_50) {
1873                 frameDrop = frameRate * 32 / 25 - 1;
1874         }
1875         else if (usbvision->tvnormId & V4L2_STD_525_60) {
1876                 frameDrop = frameRate * 32 / 30 - 1;
1877         }
1878
1879         RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1880
1881         PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1882
1883         frameDrop = FRAMERATE_MAX;      // We can allow the maximum here, because dropping is controlled
1884
1885         /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1886                 => frameSkip = 4;
1887                 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1888
1889            frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1890             => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1891                 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1892         */
1893         errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1894         return errCode;
1895 }
1896
1897
1898 /*
1899  * usbvision_frames_alloc
1900  * allocate the required frames
1901  */
1902 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1903 {
1904         int i;
1905
1906         /*needs to be page aligned cause the buffers can be mapped individually! */
1907         usbvision->max_frame_size =  PAGE_ALIGN(usbvision->curwidth *
1908                                                 usbvision->curheight *
1909                                                 usbvision->palette.bytes_per_pixel);
1910
1911         /* Try to do my best to allocate the frames the user want in the remaining memory */
1912         usbvision->num_frames = number_of_frames;
1913         while (usbvision->num_frames > 0) {
1914                 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1915                 if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
1916                         break;
1917                 }
1918                 usbvision->num_frames--;
1919         }
1920
1921         spin_lock_init(&usbvision->queue_lock);
1922         init_waitqueue_head(&usbvision->wait_frame);
1923         init_waitqueue_head(&usbvision->wait_stream);
1924
1925         /* Allocate all buffers */
1926         for (i = 0; i < usbvision->num_frames; i++) {
1927                 usbvision->frame[i].index = i;
1928                 usbvision->frame[i].grabstate = FrameState_Unused;
1929                 usbvision->frame[i].data = usbvision->fbuf +
1930                         i * usbvision->max_frame_size;
1931                 /*
1932                  * Set default sizes for read operation.
1933                  */
1934                 usbvision->stretch_width = 1;
1935                 usbvision->stretch_height = 1;
1936                 usbvision->frame[i].width = usbvision->curwidth;
1937                 usbvision->frame[i].height = usbvision->curheight;
1938                 usbvision->frame[i].bytes_read = 0;
1939         }
1940         PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
1941         return usbvision->num_frames;
1942 }
1943
1944 /*
1945  * usbvision_frames_free
1946  * frees memory allocated for the frames
1947  */
1948 void usbvision_frames_free(struct usb_usbvision *usbvision)
1949 {
1950         /* Have to free all that memory */
1951         PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
1952
1953         if (usbvision->fbuf != NULL) {
1954                 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1955                 usbvision->fbuf = NULL;
1956
1957                 usbvision->num_frames = 0;
1958         }
1959 }
1960 /*
1961  * usbvision_empty_framequeues()
1962  * prepare queues for incoming and outgoing frames
1963  */
1964 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1965 {
1966         u32 i;
1967
1968         INIT_LIST_HEAD(&(usbvision->inqueue));
1969         INIT_LIST_HEAD(&(usbvision->outqueue));
1970
1971         for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1972                 usbvision->frame[i].grabstate = FrameState_Unused;
1973                 usbvision->frame[i].bytes_read = 0;
1974         }
1975 }
1976
1977 /*
1978  * usbvision_stream_interrupt()
1979  * stops streaming
1980  */
1981 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1982 {
1983         int ret = 0;
1984
1985         /* stop reading from the device */
1986
1987         usbvision->streaming = Stream_Interrupt;
1988         ret = wait_event_timeout(usbvision->wait_stream,
1989                                  (usbvision->streaming == Stream_Idle),
1990                                  msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1991         return ret;
1992 }
1993
1994 /*
1995  * usbvision_set_compress_params()
1996  *
1997  */
1998
1999 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
2000 {
2001         static const char proc[] = "usbvision_set_compresion_params: ";
2002         int rc;
2003         unsigned char value[6];
2004
2005         value[0] = 0x0F;    // Intra-Compression cycle
2006         value[1] = 0x01;    // Reg.45 one line per strip
2007         value[2] = 0x00;    // Reg.46 Force intra mode on all new frames
2008         value[3] = 0x00;    // Reg.47 FORCE_UP <- 0 normal operation (not force)
2009         value[4] = 0xA2;    // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
2010         value[5] = 0x00;    // Reg.49 DVI_YUV This has nothing to do with compression
2011
2012         //catched values for NT1004
2013         // value[0] = 0xFF; // Never apply intra mode automatically
2014         // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
2015         // value[2] = 0x01; // Force intra mode on all new frames
2016         // value[3] = 0x00; // Strip size 400 Bytes; do not force up
2017         // value[4] = 0xA2; //
2018         if (!USBVISION_IS_OPERATIONAL(usbvision))
2019                 return 0;
2020
2021         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2022                              USBVISION_OP_CODE,
2023                              USB_DIR_OUT | USB_TYPE_VENDOR |
2024                              USB_RECIP_ENDPOINT, 0,
2025                              (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
2026
2027         if (rc < 0) {
2028                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2029                        "reconnect or reload driver.\n", proc, rc);
2030                 return rc;
2031         }
2032
2033         if (usbvision->bridgeType == BRIDGE_NT1004) {
2034                 value[0] =  20; // PCM Threshold 1
2035                 value[1] =  12; // PCM Threshold 2
2036                 value[2] = 255; // Distorsion Threshold inter
2037                 value[3] = 255; // Distorsion Threshold intra
2038                 value[4] =  43; // Max Distorsion inter
2039                 value[5] =  43; // Max Distorsion intra
2040         }
2041         else {
2042                 value[0] =  20; // PCM Threshold 1
2043                 value[1] =  12; // PCM Threshold 2
2044                 value[2] = 255; // Distorsion Threshold d7-d0
2045                 value[3] =   0; // Distorsion Threshold d11-d8
2046                 value[4] =  43; // Max Distorsion d7-d0
2047                 value[5] =   0; // Max Distorsion d8
2048         }
2049
2050         if (!USBVISION_IS_OPERATIONAL(usbvision))
2051                 return 0;
2052
2053         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2054                              USBVISION_OP_CODE,
2055                              USB_DIR_OUT | USB_TYPE_VENDOR |
2056                              USB_RECIP_ENDPOINT, 0,
2057                              (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2058
2059         if (rc < 0) {
2060                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2061                        "reconnect or reload driver.\n", proc, rc);
2062                 return rc;
2063         }
2064
2065
2066         return rc;
2067 }
2068
2069
2070 /*
2071  * usbvision_set_input()
2072  *
2073  * Set the input (saa711x, ...) size x y and other misc input params
2074  * I've no idea if this parameters are right
2075  *
2076  */
2077 int usbvision_set_input(struct usb_usbvision *usbvision)
2078 {
2079         static const char proc[] = "usbvision_set_input: ";
2080         int rc;
2081         unsigned char value[8];
2082         unsigned char dvi_yuv_value;
2083
2084         if (!USBVISION_IS_OPERATIONAL(usbvision))
2085                 return 0;
2086
2087         /* Set input format expected from decoder*/
2088         if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) {
2089                 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1;
2090         } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2091                 /* SAA7113 uses 8 bit output */
2092                 value[0] = USBVISION_8_422_SYNC;
2093         } else {
2094                 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2095                  * as that is how saa7111 is configured */
2096                 value[0] = USBVISION_16_422_SYNC;
2097                 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2098         }
2099
2100         rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2101         if (rc < 0) {
2102                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2103                        "reconnect or reload driver.\n", proc, rc);
2104                 return rc;
2105         }
2106
2107
2108         if (usbvision->tvnormId & V4L2_STD_PAL) {
2109                 value[0] = 0xC0;
2110                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2111                 value[2] = 0x20;
2112                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2113                 value[4] = 0x60;
2114                 value[5] = 0x00;        //0x0060 -> 96 Input video h offset
2115                 value[6] = 0x16;
2116                 value[7] = 0x00;        //0x0016 -> 22 Input video v offset
2117         } else if (usbvision->tvnormId & V4L2_STD_SECAM) {
2118                 value[0] = 0xC0;
2119                 value[1] = 0x02;        //0x02C0 -> 704 Input video line length
2120                 value[2] = 0x20;
2121                 value[3] = 0x01;        //0x0120 -> 288 Input video n. of lines
2122                 value[4] = 0x01;
2123                 value[5] = 0x00;        //0x0001 -> 01 Input video h offset
2124                 value[6] = 0x01;
2125                 value[7] = 0x00;        //0x0001 -> 01 Input video v offset
2126         } else {        /* V4L2_STD_NTSC */
2127                 value[0] = 0xD0;
2128                 value[1] = 0x02;        //0x02D0 -> 720 Input video line length
2129                 value[2] = 0xF0;
2130                 value[3] = 0x00;        //0x00F0 -> 240 Input video number of lines
2131                 value[4] = 0x50;
2132                 value[5] = 0x00;        //0x0050 -> 80 Input video h offset
2133                 value[6] = 0x10;
2134                 value[7] = 0x00;        //0x0010 -> 16 Input video v offset
2135         }
2136
2137         if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2138                 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2139                 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2140         }
2141
2142         if (adjust_X_Offset != -1) {
2143                 value[4] = adjust_X_Offset & 0xff;
2144                 value[5] = (adjust_X_Offset & 0x0300) >> 8;
2145         }
2146
2147         if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2148                 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2149                 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2150         }
2151
2152         if (adjust_Y_Offset != -1) {
2153                 value[6] = adjust_Y_Offset & 0xff;
2154                 value[7] = (adjust_Y_Offset & 0x0300) >> 8;
2155         }
2156
2157         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2158                              USBVISION_OP_CODE, /* USBVISION specific code */
2159                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2160                              (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2161         if (rc < 0) {
2162                 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2163                        "reconnect or reload driver.\n", proc, rc);
2164                 return rc;
2165         }
2166
2167
2168         dvi_yuv_value = 0x00;   /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2169
2170         if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){
2171                 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv;
2172         }
2173         else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2174         /* This changes as the fine sync control changes. Further investigation necessary */
2175                 dvi_yuv_value = 0x06;
2176         }
2177
2178         return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2179 }
2180
2181
2182 /*
2183  * usbvision_set_dram_settings()
2184  *
2185  * Set the buffer address needed by the usbvision dram to operate
2186  * This values has been taken with usbsnoop.
2187  *
2188  */
2189
2190 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2191 {
2192         int rc;
2193         unsigned char value[8];
2194
2195         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2196                 value[0] = 0x42;
2197                 value[1] = 0x71;
2198                 value[2] = 0xff;
2199                 value[3] = 0x00;
2200                 value[4] = 0x98;
2201                 value[5] = 0xe0;
2202                 value[6] = 0x71;
2203                 value[7] = 0xff;
2204                 // UR:  0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2205                 // FDL: 0x00000-0x0E099 =  57498 Words
2206                 // VDW: 0x0E3FF-0x3FFFF
2207         }
2208         else {
2209                 value[0] = 0x42;
2210                 value[1] = 0x00;
2211                 value[2] = 0xff;
2212                 value[3] = 0x00;
2213                 value[4] = 0x00;
2214                 value[5] = 0x00;
2215                 value[6] = 0x00;
2216                 value[7] = 0xff;
2217         }
2218         /* These are the values of the address of the video buffer,
2219          * they have to be loaded into the USBVISION_DRM_PRM1-8
2220          *
2221          * Start address of video output buffer for read:       drm_prm1-2 -> 0x00000
2222          * End address of video output buffer for read:         drm_prm1-3 -> 0x1ffff
2223          * Start address of video frame delay buffer:           drm_prm1-4 -> 0x20000
2224          *    Only used in compressed mode
2225          * End address of video frame delay buffer:             drm_prm1-5-6 -> 0x3ffff
2226          *    Only used in compressed mode
2227          * Start address of video output buffer for write:      drm_prm1-7 -> 0x00000
2228          * End address of video output buffer for write:        drm_prm1-8 -> 0x1ffff
2229          */
2230
2231         if (!USBVISION_IS_OPERATIONAL(usbvision))
2232                 return 0;
2233
2234         rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2235                              USBVISION_OP_CODE, /* USBVISION specific code */
2236                              USB_DIR_OUT | USB_TYPE_VENDOR |
2237                              USB_RECIP_ENDPOINT, 0,
2238                              (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2239
2240         if (rc < 0) {
2241                 dev_err(&usbvision->dev->dev, "%sERROR=%d\n", __func__, rc);
2242                 return rc;
2243         }
2244
2245         /* Restart the video buffer logic */
2246         if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2247                                    USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2248                 return rc;
2249         rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2250
2251         return rc;
2252 }
2253
2254 /*
2255  * ()
2256  *
2257  * Power on the device, enables suspend-resume logic
2258  * &  reset the isoc End-Point
2259  *
2260  */
2261
2262 int usbvision_power_on(struct usb_usbvision *usbvision)
2263 {
2264         int errCode = 0;
2265
2266         PDEBUG(DBG_FUNC, "");
2267
2268         usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2269         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2270                          USBVISION_SSPND_EN | USBVISION_RES2);
2271
2272         usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2273                          USBVISION_SSPND_EN | USBVISION_PWR_VID);
2274         errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2275                                                 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2276         if (errCode == 1) {
2277                 usbvision->power = 1;
2278         }
2279         PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2280         return errCode;
2281 }
2282
2283
2284 /*
2285  * usbvision timer stuff
2286  */
2287
2288 // to call usbvision_power_off from task queue
2289 static void call_usbvision_power_off(struct work_struct *work)
2290 {
2291         struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2292
2293         PDEBUG(DBG_FUNC, "");
2294         if(mutex_lock_interruptible(&usbvision->lock)) {
2295                 return;
2296         }
2297
2298
2299         if(usbvision->user == 0) {
2300                 usbvision_i2c_unregister(usbvision);
2301
2302                 usbvision_power_off(usbvision);
2303                 usbvision->initialized = 0;
2304         }
2305         mutex_unlock(&usbvision->lock);
2306 }
2307
2308 static void usbvision_powerOffTimer(unsigned long data)
2309 {
2310         struct usb_usbvision *usbvision = (void *) data;
2311
2312         PDEBUG(DBG_FUNC, "");
2313         del_timer(&usbvision->powerOffTimer);
2314         INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2315         (void) schedule_work(&usbvision->powerOffWork);
2316 }
2317
2318 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2319 {
2320         init_timer(&usbvision->powerOffTimer);
2321         usbvision->powerOffTimer.data = (long) usbvision;
2322         usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2323 }
2324
2325 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2326 {
2327         mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2328 }
2329
2330 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2331 {
2332         if (timer_pending(&usbvision->powerOffTimer)) {
2333                 del_timer(&usbvision->powerOffTimer);
2334         }
2335 }
2336
2337 /*
2338  * usbvision_begin_streaming()
2339  * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2340  * idea about the rest
2341  */
2342 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2343 {
2344         int errCode = 0;
2345
2346         if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2347                 usbvision_init_compression(usbvision);
2348         }
2349         errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2350                                                                                 usbvision->Vin_Reg2_Preset);
2351         return errCode;
2352 }
2353
2354 /*
2355  * usbvision_restart_isoc()
2356  * Not sure yet if touching here PWR_REG make loose the config
2357  */
2358
2359 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2360 {
2361         int ret;
2362
2363         if (
2364             (ret =
2365              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2366                               USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2367                 return ret;
2368         if (
2369             (ret =
2370              usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2371                               USBVISION_SSPND_EN | USBVISION_PWR_VID |
2372                               USBVISION_RES2)) < 0)
2373                 return ret;
2374         if (
2375             (ret =
2376              usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2377                               USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2378                                   usbvision->Vin_Reg2_Preset)) < 0) return ret;
2379
2380         /* TODO: schedule timeout */
2381         while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2382
2383         return 0;
2384 }
2385
2386 int usbvision_audio_off(struct usb_usbvision *usbvision)
2387 {
2388         if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2389                 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2390                 return -1;
2391         }
2392         usbvision->AudioMute = 0;
2393         usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2394         return 0;
2395 }
2396
2397 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2398 {
2399         if (!usbvision->AudioMute) {
2400                 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2401                         printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2402                         return -1;
2403                 }
2404         }
2405         usbvision->AudioChannel = AudioChannel;
2406         return 0;
2407 }
2408
2409 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2410 {
2411         usbvision_set_video_format(usbvision, format);
2412         usbvision_set_dram_settings(usbvision);
2413         usbvision_set_compress_params(usbvision);
2414         usbvision_set_input(usbvision);
2415         usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2416         usbvision_restart_isoc(usbvision);
2417
2418         /* cosas del PCM */
2419         return USBVISION_IS_OPERATIONAL(usbvision);
2420 }
2421
2422 int usbvision_set_alternate(struct usb_usbvision *dev)
2423 {
2424         int errCode, prev_alt = dev->ifaceAlt;
2425         int i;
2426
2427         dev->ifaceAlt=0;
2428         for(i=0;i< dev->num_alt; i++)
2429                 if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt])
2430                         dev->ifaceAlt=i;
2431
2432         if (dev->ifaceAlt != prev_alt) {
2433                 dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt];
2434                 PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize);
2435                 errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt);
2436                 if (errCode < 0) {
2437                         dev_err(&dev->dev->dev,
2438                                 "cannot change alternate number to %d (error=%i)\n",
2439                                         dev->ifaceAlt, errCode);
2440                         return errCode;
2441                 }
2442         }
2443
2444         PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize);
2445
2446         return 0;
2447 }
2448
2449 /*
2450  * usbvision_init_isoc()
2451  *
2452  */
2453 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2454 {
2455         struct usb_device *dev = usbvision->dev;
2456         int bufIdx, errCode, regValue;
2457         int sb_size;
2458
2459         if (!USBVISION_IS_OPERATIONAL(usbvision))
2460                 return -EFAULT;
2461
2462         usbvision->curFrame = NULL;
2463         scratch_reset(usbvision);
2464
2465         /* Alternate interface 1 is is the biggest frame size */
2466         errCode = usbvision_set_alternate(usbvision);
2467         if (errCode < 0) {
2468                 usbvision->last_error = errCode;
2469                 return -EBUSY;
2470         }
2471         sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2472
2473         regValue = (16 - usbvision_read_reg(usbvision,
2474                                             USBVISION_ALTER_REG)) & 0x0F;
2475
2476         usbvision->usb_bandwidth = regValue >> 1;
2477         PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2478                usbvision->usb_bandwidth);
2479
2480
2481
2482         /* We double buffer the Iso lists */
2483
2484         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2485                 int j, k;
2486                 struct urb *urb;
2487
2488                 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2489                 if (urb == NULL) {
2490                         dev_err(&usbvision->dev->dev,
2491                                 "%s: usb_alloc_urb() failed\n", __func__);
2492                         return -ENOMEM;
2493                 }
2494                 usbvision->sbuf[bufIdx].urb = urb;
2495                 usbvision->sbuf[bufIdx].data =
2496                         usb_buffer_alloc(usbvision->dev,
2497                                          sb_size,
2498                                          GFP_KERNEL,
2499                                          &urb->transfer_dma);
2500                 urb->dev = dev;
2501                 urb->context = usbvision;
2502                 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2503                 urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
2504                 urb->interval = 1;
2505                 urb->transfer_buffer = usbvision->sbuf[bufIdx].data;
2506                 urb->complete = usbvision_isocIrq;
2507                 urb->number_of_packets = USBVISION_URB_FRAMES;
2508                 urb->transfer_buffer_length =
2509                     usbvision->isocPacketSize * USBVISION_URB_FRAMES;
2510                 for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
2511                      k += usbvision->isocPacketSize) {
2512                         urb->iso_frame_desc[j].offset = k;
2513                         urb->iso_frame_desc[j].length =
2514                                 usbvision->isocPacketSize;
2515                 }
2516         }
2517
2518         /* Submit all URBs */
2519         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2520                         errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb,
2521                                                  GFP_KERNEL);
2522                 if (errCode) {
2523                         dev_err(&usbvision->dev->dev,
2524                                 "%s: usb_submit_urb(%d) failed: error %d\n",
2525                                         __func__, bufIdx, errCode);
2526                 }
2527         }
2528
2529         usbvision->streaming = Stream_Idle;
2530         PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2531                __func__,
2532                usbvision->video_endp);
2533         return 0;
2534 }
2535
2536 /*
2537  * usbvision_stop_isoc()
2538  *
2539  * This procedure stops streaming and deallocates URBs. Then it
2540  * activates zero-bandwidth alt. setting of the video interface.
2541  *
2542  */
2543 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2544 {
2545         int bufIdx, errCode, regValue;
2546         int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2547
2548         if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2549                 return;
2550
2551         /* Unschedule all of the iso td's */
2552         for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2553                 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2554                 if (usbvision->sbuf[bufIdx].data){
2555                         usb_buffer_free(usbvision->dev,
2556                                         sb_size,
2557                                         usbvision->sbuf[bufIdx].data,
2558                                         usbvision->sbuf[bufIdx].urb->transfer_dma);
2559                 }
2560                 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2561                 usbvision->sbuf[bufIdx].urb = NULL;
2562         }
2563
2564         PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __func__);
2565         usbvision->streaming = Stream_Off;
2566
2567         if (!usbvision->remove_pending) {
2568
2569                 /* Set packet size to 0 */
2570                 usbvision->ifaceAlt=0;
2571                 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2572                                             usbvision->ifaceAlt);
2573                 if (errCode < 0) {
2574                         dev_err(&usbvision->dev->dev,
2575                                 "%s: usb_set_interface() failed: error %d\n",
2576                                         __func__, errCode);
2577                         usbvision->last_error = errCode;
2578                 }
2579                 regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2580                 usbvision->isocPacketSize =
2581                         (regValue == 0) ? 0 : (regValue * 64) - 1;
2582                 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2583                        usbvision->isocPacketSize);
2584
2585                 usbvision->usb_bandwidth = regValue >> 1;
2586                 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2587                        usbvision->usb_bandwidth);
2588         }
2589 }
2590
2591 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2592 {
2593         /* inputs #0 and #3 are constant for every SAA711x. */
2594         /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2595         int mode[4]= {SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3};
2596         int audio[]= {1, 0, 0, 0};
2597         //channel 0 is TV with audiochannel 1 (tuner mono)
2598         //channel 1 is Composite with audio channel 0 (line in)
2599         //channel 2 is S-Video with audio channel 0 (line in)
2600         //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2601
2602         RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2603         usbvision->ctl_input = channel;
2604
2605         // set the new channel
2606         // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2607         // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2608
2609         switch (usbvision_device_data[usbvision->DevModel].Codec) {
2610                 case CODEC_SAA7113:
2611                         mode[1] = SAA7115_COMPOSITE2;
2612                         if (SwitchSVideoInput) {
2613                                 /* To handle problems with S-Video Input for
2614                                  * some devices.  Use SwitchSVideoInput
2615                                  * parameter when loading the module.*/
2616                                 mode[2] = SAA7115_COMPOSITE1;
2617                         }
2618                         else {
2619                                 mode[2] = SAA7115_SVIDEO1;
2620                         }
2621                         break;
2622                 case CODEC_SAA7111:
2623                 default:
2624                         /* modes for saa7111 */
2625                         mode[1] = SAA7115_COMPOSITE1;
2626                         mode[2] = SAA7115_SVIDEO1;
2627                         break;
2628         }
2629         call_all(usbvision, video, s_routing, mode[channel], 0, 0);
2630         usbvision_set_audio(usbvision, audio[channel]);
2631         return 0;
2632 }
2633
2634 /*
2635  * Overrides for Emacs so that we follow Linus's tabbing style.
2636  * ---------------------------------------------------------------------------
2637  * Local variables:
2638  * c-basic-offset: 8
2639  * End:
2640  */