2 * usbvision-core.c - driver for NT100x USB video capture devices
5 * Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
6 * Dwaine Garden <dwainegarden@rogers.com>
8 * This module is part of usbvision driver project.
9 * Updates to driver completed by Dwaine P. Garden
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.
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.
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.
26 #include <linux/kernel.h>
27 #include <linux/list.h>
28 #include <linux/timer.h>
29 #include <linux/slab.h>
31 #include <linux/utsname.h>
32 #include <linux/highmem.h>
33 #include <linux/vmalloc.h>
34 #include <linux/module.h>
35 #include <linux/init.h>
36 #include <linux/spinlock.h>
38 #include <linux/videodev2.h>
39 #include <linux/video_decoder.h>
40 #include <linux/i2c.h>
42 #include <media/saa7115.h>
43 #include <media/v4l2-common.h>
44 #include <media/tuner.h>
46 #include <linux/workqueue.h>
49 #include <linux/kmod.h>
52 #include "usbvision.h"
54 static unsigned int core_debug;
55 module_param(core_debug,int,0644);
56 MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
58 static unsigned int force_testpattern;
59 module_param(force_testpattern,int,0644);
60 MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]");
62 static int adjustCompression = 1; /* Set the compression to be adaptive */
63 module_param(adjustCompression, int, 0444);
64 MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device. Default: 1 (On)");
66 /* To help people with Black and White output with using s-video input.
67 * Some cables and input device are wired differently. */
68 static int SwitchSVideoInput;
69 module_param(SwitchSVideoInput, int, 0444);
70 MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)");
72 static unsigned int adjust_X_Offset = -1;
73 module_param(adjust_X_Offset, int, 0644);
74 MODULE_PARM_DESC(adjust_X_Offset, "adjust X offset display [core]");
76 static unsigned int adjust_Y_Offset = -1;
77 module_param(adjust_Y_Offset, int, 0644);
78 MODULE_PARM_DESC(adjust_Y_Offset, "adjust Y offset display [core]");
81 #define ENABLE_HEXDUMP 0 /* Enable if you need it */
84 #ifdef USBVISION_DEBUG
85 #define PDEBUG(level, fmt, args...) { \
86 if (core_debug & (level)) \
87 printk(KERN_INFO KBUILD_MODNAME ":[%s:%d] " fmt, \
88 __func__, __LINE__ , ## args); \
91 #define PDEBUG(level, fmt, args...) do {} while(0)
94 #define DBG_HEADER 1<<0
97 #define DBG_PARSE 1<<3
98 #define DBG_SCRATCH 1<<4
101 static const int max_imgwidth = MAX_FRAME_WIDTH;
102 static const int max_imgheight = MAX_FRAME_HEIGHT;
103 static const int min_imgwidth = MIN_FRAME_WIDTH;
104 static const int min_imgheight = MIN_FRAME_HEIGHT;
106 /* The value of 'scratch_buf_size' affects quality of the picture
107 * in many ways. Shorter buffers may cause loss of data when client
108 * is too slow. Larger buffers are memory-consuming and take longer
109 * to work with. This setting can be adjusted, but the default value
110 * should be OK for most desktop users.
112 #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) // 128kB memory scratch buffer
113 static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE;
115 // Function prototypes
116 static int usbvision_request_intra (struct usb_usbvision *usbvision);
117 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision);
118 static int usbvision_adjust_compression (struct usb_usbvision *usbvision);
119 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision);
121 /*******************************/
122 /* Memory management functions */
123 /*******************************/
126 * Here we want the physical address of the memory.
127 * This is used when initializing the contents of the area.
130 static void *usbvision_rvmalloc(unsigned long size)
135 size = PAGE_ALIGN(size);
136 mem = vmalloc_32(size);
140 memset(mem, 0, size); /* Clear the ram out, no junk to the user */
141 adr = (unsigned long) mem;
143 SetPageReserved(vmalloc_to_page((void *)adr));
151 static void usbvision_rvfree(void *mem, unsigned long size)
158 size = PAGE_ALIGN(size);
160 adr = (unsigned long) mem;
161 while ((long) size > 0) {
162 ClearPageReserved(vmalloc_to_page((void *)adr));
172 static void usbvision_hexdump(const unsigned char *data, int len)
177 for (i = k = 0; len > 0; i++, len--) {
178 if (i > 0 && (i % 16 == 0)) {
182 k += sprintf(&tmp[k], "%02x ", data[i]);
189 /********************************
190 * scratch ring buffer handling
191 ********************************/
192 static int scratch_len(struct usb_usbvision *usbvision) /*This returns the amount of data actually in the buffer */
194 int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr;
196 len += scratch_buf_size;
198 PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len);
204 /* This returns the free space left in the buffer */
205 static int scratch_free(struct usb_usbvision *usbvision)
207 int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr;
209 free += scratch_buf_size;
212 free -= 1; /* at least one byte in the buffer must */
213 /* left blank, otherwise there is no chance to differ between full and empty */
215 PDEBUG(DBG_SCRATCH, "return %d\n", free);
221 /* This puts data into the buffer */
222 static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data,
227 if (usbvision->scratch_write_ptr + len < scratch_buf_size) {
228 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len);
229 usbvision->scratch_write_ptr += len;
232 len_part = scratch_buf_size - usbvision->scratch_write_ptr;
233 memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part);
234 if (len == len_part) {
235 usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */
238 memcpy(usbvision->scratch, data + len_part, len - len_part);
239 usbvision->scratch_write_ptr = len - len_part;
243 PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr);
248 /* This marks the write_ptr as position of new frame header */
249 static void scratch_mark_header(struct usb_usbvision *usbvision)
251 PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr);
253 usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] =
254 usbvision->scratch_write_ptr;
255 usbvision->scratch_headermarker_write_ptr += 1;
256 usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER;
259 /* This gets data from the buffer at the given "ptr" position */
260 static int scratch_get_extra(struct usb_usbvision *usbvision,
261 unsigned char *data, int *ptr, int len)
264 if (*ptr + len < scratch_buf_size) {
265 memcpy(data, usbvision->scratch + *ptr, len);
269 len_part = scratch_buf_size - *ptr;
270 memcpy(data, usbvision->scratch + *ptr, len_part);
271 if (len == len_part) {
272 *ptr = 0; /* just set the y_ptr to zero */
275 memcpy(data + len_part, usbvision->scratch, len - len_part);
276 *ptr = len - len_part;
280 PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr);
286 /* This sets the scratch extra read pointer */
287 static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr,
290 *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size;
292 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
296 /*This increments the scratch extra read pointer */
297 static void scratch_inc_extra_ptr(int *ptr, int len)
299 *ptr = (*ptr + len) % scratch_buf_size;
301 PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr);
305 /* This gets data from the buffer */
306 static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data,
310 if (usbvision->scratch_read_ptr + len < scratch_buf_size) {
311 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len);
312 usbvision->scratch_read_ptr += len;
315 len_part = scratch_buf_size - usbvision->scratch_read_ptr;
316 memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part);
317 if (len == len_part) {
318 usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */
321 memcpy(data + len_part, usbvision->scratch, len - len_part);
322 usbvision->scratch_read_ptr = len - len_part;
326 PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr);
332 /* This sets read pointer to next header and returns it */
333 static int scratch_get_header(struct usb_usbvision *usbvision,
334 struct usbvision_frame_header *header)
338 PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr);
340 while (usbvision->scratch_headermarker_write_ptr -
341 usbvision->scratch_headermarker_read_ptr != 0) {
342 usbvision->scratch_read_ptr =
343 usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr];
344 usbvision->scratch_headermarker_read_ptr += 1;
345 usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER;
346 scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH);
347 if ((header->magic_1 == USBVISION_MAGIC_1)
348 && (header->magic_2 == USBVISION_MAGIC_2)
349 && (header->headerLength == USBVISION_HEADER_LENGTH)) {
350 errCode = USBVISION_HEADER_LENGTH;
351 header->frameWidth = header->frameWidthLo + (header->frameWidthHi << 8);
352 header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8);
361 /*This removes len bytes of old data from the buffer */
362 static void scratch_rm_old(struct usb_usbvision *usbvision, int len)
365 usbvision->scratch_read_ptr += len;
366 usbvision->scratch_read_ptr %= scratch_buf_size;
367 PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr);
371 /*This resets the buffer - kills all data in it too */
372 static void scratch_reset(struct usb_usbvision *usbvision)
374 PDEBUG(DBG_SCRATCH, "\n");
376 usbvision->scratch_read_ptr = 0;
377 usbvision->scratch_write_ptr = 0;
378 usbvision->scratch_headermarker_read_ptr = 0;
379 usbvision->scratch_headermarker_write_ptr = 0;
380 usbvision->isocstate = IsocState_NoFrame;
383 int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
385 usbvision->scratch = vmalloc_32(scratch_buf_size);
386 scratch_reset(usbvision);
387 if(usbvision->scratch == NULL) {
388 err("%s: unable to allocate %d bytes for scratch",
389 __func__, scratch_buf_size);
395 void usbvision_scratch_free(struct usb_usbvision *usbvision)
397 if (usbvision->scratch != NULL) {
398 vfree(usbvision->scratch);
399 usbvision->scratch = NULL;
404 * usbvision_testpattern()
406 * Procedure forms a test pattern (yellow grid on blue background).
409 * fullframe: if TRUE then entire frame is filled, otherwise the procedure
410 * continues from the current scanline.
411 * pmode 0: fill the frame with solid blue color (like on VCR or TV)
412 * 1: Draw a colored grid
415 static void usbvision_testpattern(struct usb_usbvision *usbvision,
416 int fullframe, int pmode)
418 static const char proc[] = "usbvision_testpattern";
419 struct usbvision_frame *frame;
425 if (usbvision == NULL) {
426 printk(KERN_ERR "%s: usbvision == NULL\n", proc);
429 if (usbvision->curFrame == NULL) {
430 printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc);
434 /* Grab the current frame */
435 frame = usbvision->curFrame;
437 /* Optionally start at the beginning */
440 frame->scanlength = 0;
443 /* Form every scan line */
444 for (; frame->curline < frame->frmheight; frame->curline++) {
447 f = frame->data + (usbvision->curwidth * 3 * frame->curline);
448 for (i = 0; i < usbvision->curwidth; i++) {
449 unsigned char cb = 0x80;
450 unsigned char cg = 0;
451 unsigned char cr = 0;
454 if (frame->curline % 32 == 0)
455 cb = 0, cg = cr = 0xFF;
456 else if (i % 32 == 0) {
457 if (frame->curline % 32 == 1)
459 cb = 0, cg = cr = 0xFF;
466 num_pass * 2) & 0xFF;
469 num_pass * 3) & 0xFF;
472 /* Just the blue screen */
482 frame->grabstate = FrameState_Done;
483 frame->scanlength += scan_length;
489 * usbvision_decompress_alloc()
491 * allocates intermediate buffer for decompression
493 int usbvision_decompress_alloc(struct usb_usbvision *usbvision)
495 int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2;
496 usbvision->IntraFrameBuffer = vmalloc_32(IFB_size);
497 if (usbvision->IntraFrameBuffer == NULL) {
498 err("%s: unable to allocate %d for compr. frame buffer",
506 * usbvision_decompress_free()
508 * frees intermediate buffer for decompression
510 void usbvision_decompress_free(struct usb_usbvision *usbvision)
512 if (usbvision->IntraFrameBuffer != NULL) {
513 vfree(usbvision->IntraFrameBuffer);
514 usbvision->IntraFrameBuffer = NULL;
518 /************************************************************
519 * Here comes the data parsing stuff that is run as interrupt
520 ************************************************************/
522 * usbvision_find_header()
524 * Locate one of supported header markers in the scratch buffer.
526 static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision)
528 struct usbvision_frame *frame;
531 frame = usbvision->curFrame;
533 while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) {
534 // found header in scratch
535 PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u",
536 frame->isocHeader.magic_2,
537 frame->isocHeader.magic_1,
538 frame->isocHeader.headerLength,
539 frame->isocHeader.frameNum,
540 frame->isocHeader.framePhase,
541 frame->isocHeader.frameLatency,
542 frame->isocHeader.dataFormat,
543 frame->isocHeader.formatParam,
544 frame->isocHeader.frameWidth,
545 frame->isocHeader.frameHeight);
547 if (usbvision->requestIntra) {
548 if (frame->isocHeader.formatParam & 0x80) {
550 usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time
551 usbvision_unrequest_intra(usbvision);
562 frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width;
563 frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height;
564 frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3;
566 else { // no header found
567 PDEBUG(DBG_HEADER, "skipping scratch data, no header");
568 scratch_reset(usbvision);
569 return ParseState_EndParse;
573 if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) {
574 //check isocHeader.frameNum for lost frames
575 if (usbvision->lastIsocFrameNum >= 0) {
576 if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) {
577 // unexpected frame drop: need to request new intra frame
578 PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum);
579 usbvision_request_intra(usbvision);
580 return ParseState_NextFrame;
583 usbvision->lastIsocFrameNum = frame->isocHeader.frameNum;
585 usbvision->header_count++;
586 frame->scanstate = ScanState_Lines;
589 if (force_testpattern) {
590 usbvision_testpattern(usbvision, 1, 1);
591 return ParseState_NextFrame;
593 return ParseState_Continue;
596 static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision,
599 volatile struct usbvision_frame *frame;
603 unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components
604 unsigned char rv, gv, bv; // RGB components
605 int clipmask_index, bytes_per_pixel;
606 int stretch_bytes, clipmask_add;
608 frame = usbvision->curFrame;
609 f = frame->data + (frame->v4l2_linesize * frame->curline);
611 /* Make sure there's enough data for the entire line */
612 len = (frame->isocHeader.frameWidth * 2)+5;
613 if (scratch_len(usbvision) < len) {
614 PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
615 return ParseState_Out;
618 if ((frame->curline + 1) >= frame->frmheight) {
619 return ParseState_NextFrame;
622 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
623 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
624 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
625 clipmask_add = usbvision->stretch_width;
627 for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) {
629 scratch_get(usbvision, &yuyv[0], 4);
631 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
637 YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv);
638 switch (frame->v4l2_format.format) {
639 case V4L2_PIX_FMT_RGB565:
642 *f++ = (0x07 & (gv >> 3)) |
645 case V4L2_PIX_FMT_RGB24:
650 case V4L2_PIX_FMT_RGB32:
656 case V4L2_PIX_FMT_RGB555:
659 *f++ = (0x03 & (gv >> 3)) |
664 clipmask_index += clipmask_add;
667 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
673 YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv);
674 switch (frame->v4l2_format.format) {
675 case V4L2_PIX_FMT_RGB565:
678 *f++ = (0x07 & (gv >> 3)) |
681 case V4L2_PIX_FMT_RGB24:
686 case V4L2_PIX_FMT_RGB32:
692 case V4L2_PIX_FMT_RGB555:
695 *f++ = (0x03 & (gv >> 3)) |
700 clipmask_index += clipmask_add;
704 frame->curline += usbvision->stretch_height;
705 *pcopylen += frame->v4l2_linesize * usbvision->stretch_height;
707 if (frame->curline >= frame->frmheight) {
708 return ParseState_NextFrame;
711 return ParseState_Continue;
715 /* The decompression routine */
716 static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed,
717 unsigned char *Decompressed, int *StartPos,
718 int *BlockTypeStartPos, int Len)
720 int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen;
721 unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator;
725 BlockTypePos = *BlockTypeStartPos;
726 MaxPos = 396; //Pos + Len;
736 for (Idx = 0; Idx < Len; Idx++) {
739 if (BlockTypeLen==0) {
740 BlockTypeByte = Compressed[BlockTypePos];
744 BlockType = (BlockTypeByte & 0xC0) >> 6;
747 usbvision->ComprBlockTypes[BlockType]++;
750 if (BlockType == 0) {
751 if(RestPixel >= 24) {
754 Integrator = Decompressed[Idx];
756 Idx += RestPixel - 1;
760 BlockCode = Compressed[Pos];
762 if (RestPixel >= 24) {
765 BlockLen = RestPixel;
767 RestPixel -= BlockLen;
768 ExtraPos = Pos + (BlockLen / 4);
774 if ((BlockLen%4) == 0) {
775 BlockByte = Compressed[Pos];
778 if (BlockType == 1) { //inter Block
779 Integrator = Decompressed[Idx];
781 switch (BlockByte & 0xC0) {
783 Integrator += Compressed[ExtraPos];
787 Integrator += BlockCode;
790 Integrator -= BlockCode;
793 Decompressed[Idx] = Integrator;
798 *StartPos = ExtraPos;
799 *BlockTypeStartPos = BlockTypePos;
805 * usbvision_parse_compress()
807 * Parse compressed frame from the scratch buffer, put
808 * decoded RGB value into the current frame buffer and add the written
809 * number of bytes (RGB) to the *pcopylen.
812 static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision,
815 #define USBVISION_STRIP_MAGIC 0x5A
816 #define USBVISION_STRIP_LEN_MAX 400
817 #define USBVISION_STRIP_HEADER_LEN 3
819 struct usbvision_frame *frame;
820 unsigned char *f,*u = NULL ,*v = NULL;
821 unsigned char StripData[USBVISION_STRIP_LEN_MAX];
822 unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN];
823 int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos;
824 int clipmask_index, bytes_per_pixel, rc;
826 unsigned char rv, gv, bv;
827 static unsigned char *Y, *U, *V;
829 frame = usbvision->curFrame;
830 imageSize = frame->frmwidth * frame->frmheight;
831 if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) ||
832 (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) { // this is a planar format
833 //... v4l2_linesize not used here.
834 f = frame->data + (frame->width * frame->curline);
836 f = frame->data + (frame->v4l2_linesize * frame->curline);
838 if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers
839 // get base of u and b planes add halfoffset
843 + (frame->frmwidth >>1) * frame->curline ;
844 v = u + (imageSize >>1 );
846 } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){
848 v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ;
849 u = v + (imageSize >>2) ;
852 if (frame->curline == 0) {
853 usbvision_adjust_compression(usbvision);
856 if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) {
857 return ParseState_Out;
860 //get strip header without changing the scratch_read_ptr
861 scratch_set_extra_ptr(usbvision, &StripPtr, 0);
862 scratch_get_extra(usbvision, &StripHeader[0], &StripPtr,
863 USBVISION_STRIP_HEADER_LEN);
865 if (StripHeader[0] != USBVISION_STRIP_MAGIC) {
867 usbvision->stripMagicErrors++;
868 return ParseState_NextFrame;
871 if (frame->curline != (int)StripHeader[2]) {
872 //line number missmatch error
873 usbvision->stripLineNumberErrors++;
876 StripLen = 2 * (unsigned int)StripHeader[1];
877 if (StripLen > USBVISION_STRIP_LEN_MAX) {
879 // I think this never happens
880 usbvision_request_intra(usbvision);
883 if (scratch_len(usbvision) < StripLen) {
884 //there is not enough data for the strip
885 return ParseState_Out;
888 if (usbvision->IntraFrameBuffer) {
889 Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline;
890 U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2);
891 V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
894 return ParseState_NextFrame;
897 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
898 clipmask_index = frame->curline * MAX_FRAME_WIDTH;
900 scratch_get(usbvision, StripData, StripLen);
902 IdxEnd = frame->frmwidth;
903 BlockTypePos = USBVISION_STRIP_HEADER_LEN;
904 StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2;
905 BlockPos = StartBlockPos;
907 usbvision->BlockPos = BlockPos;
909 if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) {
910 //return ParseState_Continue;
912 if (StripLen > usbvision->maxStripLen) {
913 usbvision->maxStripLen = StripLen;
916 if (frame->curline%2) {
917 if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
918 //return ParseState_Continue;
922 if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) {
923 //return ParseState_Continue;
927 if (BlockPos > usbvision->comprBlockPos) {
928 usbvision->comprBlockPos = BlockPos;
930 if (BlockPos > StripLen) {
931 usbvision->stripLenErrors++;
934 for (Idx = 0; Idx < IdxEnd; Idx++) {
935 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
937 *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2];
939 else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) {
946 else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
948 if ( !(( Idx & 0x01 ) | ( frame->curline & 0x01 )) ){
950 /* only need do this for 1 in 4 pixels */
951 /* intraframe buffer is YUV420 format */
959 YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv);
960 switch (frame->v4l2_format.format) {
961 case V4L2_PIX_FMT_GREY:
964 case V4L2_PIX_FMT_RGB555:
967 *f++ = (0x03 & (gv >> 3)) |
970 case V4L2_PIX_FMT_RGB565:
973 *f++ = (0x07 & (gv >> 3)) |
976 case V4L2_PIX_FMT_RGB24:
981 case V4L2_PIX_FMT_RGB32:
991 /* Deal with non-integer no. of bytes for YUV420P */
992 if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 )
993 *pcopylen += frame->v4l2_linesize;
995 *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1;
999 if (frame->curline >= frame->frmheight) {
1000 return ParseState_NextFrame;
1003 return ParseState_Continue;
1010 * usbvision_parse_lines_420()
1012 * Parse two lines from the scratch buffer, put
1013 * decoded RGB value into the current frame buffer and add the written
1014 * number of bytes (RGB) to the *pcopylen.
1017 static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision,
1020 struct usbvision_frame *frame;
1021 unsigned char *f_even = NULL, *f_odd = NULL;
1022 unsigned int pixel_per_line, block;
1023 int pixel, block_split;
1024 int y_ptr, u_ptr, v_ptr, y_odd_offset;
1025 const int y_block_size = 128;
1026 const int uv_block_size = 64;
1027 const int sub_block_size = 32;
1028 const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4;
1029 const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4;
1030 unsigned char y[2], u, v; /* YUV components */
1031 int y_, u_, v_, vb, uvg, ur;
1032 int r_, g_, b_; /* RGB components */
1034 int clipmask_even_index, clipmask_odd_index, bytes_per_pixel;
1035 int clipmask_add, stretch_bytes;
1037 frame = usbvision->curFrame;
1038 f_even = frame->data + (frame->v4l2_linesize * frame->curline);
1039 f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height;
1041 /* Make sure there's enough data for the entire line */
1042 /* In this mode usbvision transfer 3 bytes for every 2 pixels */
1043 /* I need two lines to decode the color */
1044 bytes_per_pixel = frame->v4l2_format.bytes_per_pixel;
1045 stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel;
1046 clipmask_even_index = frame->curline * MAX_FRAME_WIDTH;
1047 clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH;
1048 clipmask_add = usbvision->stretch_width;
1049 pixel_per_line = frame->isocHeader.frameWidth;
1051 if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
1052 //printk(KERN_DEBUG "out of data, need %d\n", len);
1053 return ParseState_Out;
1056 if ((frame->curline + 1) >= frame->frmheight) {
1057 return ParseState_NextFrame;
1060 block_split = (pixel_per_line%y_block_size) ? 1 : 0; //are some blocks splitted into different lines?
1062 y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size)
1063 + block_split * uv_block_size;
1065 scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset);
1066 scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size);
1067 scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset
1068 + (4 - block_split) * sub_block_size);
1070 for (block = 0; block < (pixel_per_line / sub_block_size);
1074 for (pixel = 0; pixel < sub_block_size; pixel +=2) {
1075 scratch_get(usbvision, &y[0], 2);
1076 scratch_get_extra(usbvision, &u, &u_ptr, 1);
1077 scratch_get_extra(usbvision, &v, &v_ptr, 1);
1079 //I don't use the YUV_TO_RGB macro for better performance
1083 uvg= -53281 * u_ - 25625 * v_;
1086 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1091 y_ = 76284 * (y[0] - 16);
1093 b_ = (y_ + vb) >> 16;
1094 g_ = (y_ + uvg)>> 16;
1095 r_ = (y_ + ur) >> 16;
1097 switch (frame->v4l2_format.format) {
1098 case V4L2_PIX_FMT_RGB565:
1101 (0x1F & LIMIT_RGB(r_)) |
1105 (0xF8 & LIMIT_RGB(b_));
1107 case V4L2_PIX_FMT_RGB24:
1108 *f_even++ = LIMIT_RGB(r_);
1109 *f_even++ = LIMIT_RGB(g_);
1110 *f_even++ = LIMIT_RGB(b_);
1112 case V4L2_PIX_FMT_RGB32:
1113 *f_even++ = LIMIT_RGB(r_);
1114 *f_even++ = LIMIT_RGB(g_);
1115 *f_even++ = LIMIT_RGB(b_);
1118 case V4L2_PIX_FMT_RGB555:
1120 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1122 *f_even++ = (0x03 & (g >> 3)) |
1123 (0x7C & (LIMIT_RGB(b_) << 2));
1127 clipmask_even_index += clipmask_add;
1128 f_even += stretch_bytes;
1130 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1135 y_ = 76284 * (y[1] - 16);
1137 b_ = (y_ + vb) >> 16;
1138 g_ = (y_ + uvg)>> 16;
1139 r_ = (y_ + ur) >> 16;
1141 switch (frame->v4l2_format.format) {
1142 case V4L2_PIX_FMT_RGB565:
1145 (0x1F & LIMIT_RGB(r_)) |
1149 (0xF8 & LIMIT_RGB(b_));
1151 case V4L2_PIX_FMT_RGB24:
1152 *f_even++ = LIMIT_RGB(r_);
1153 *f_even++ = LIMIT_RGB(g_);
1154 *f_even++ = LIMIT_RGB(b_);
1156 case V4L2_PIX_FMT_RGB32:
1157 *f_even++ = LIMIT_RGB(r_);
1158 *f_even++ = LIMIT_RGB(g_);
1159 *f_even++ = LIMIT_RGB(b_);
1162 case V4L2_PIX_FMT_RGB555:
1164 *f_even++ = (0x1F & LIMIT_RGB(r_)) |
1166 *f_even++ = (0x03 & (g >> 3)) |
1167 (0x7C & (LIMIT_RGB(b_) << 2));
1171 clipmask_even_index += clipmask_add;
1172 f_even += stretch_bytes;
1174 scratch_get_extra(usbvision, &y[0], &y_ptr, 2);
1176 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1181 y_ = 76284 * (y[0] - 16);
1183 b_ = (y_ + vb) >> 16;
1184 g_ = (y_ + uvg)>> 16;
1185 r_ = (y_ + ur) >> 16;
1187 switch (frame->v4l2_format.format) {
1188 case V4L2_PIX_FMT_RGB565:
1191 (0x1F & LIMIT_RGB(r_)) |
1195 (0xF8 & LIMIT_RGB(b_));
1197 case V4L2_PIX_FMT_RGB24:
1198 *f_odd++ = LIMIT_RGB(r_);
1199 *f_odd++ = LIMIT_RGB(g_);
1200 *f_odd++ = LIMIT_RGB(b_);
1202 case V4L2_PIX_FMT_RGB32:
1203 *f_odd++ = LIMIT_RGB(r_);
1204 *f_odd++ = LIMIT_RGB(g_);
1205 *f_odd++ = LIMIT_RGB(b_);
1208 case V4L2_PIX_FMT_RGB555:
1210 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1212 *f_odd++ = (0x03 & (g >> 3)) |
1213 (0x7C & (LIMIT_RGB(b_) << 2));
1217 clipmask_odd_index += clipmask_add;
1218 f_odd += stretch_bytes;
1220 if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) {
1225 y_ = 76284 * (y[1] - 16);
1227 b_ = (y_ + vb) >> 16;
1228 g_ = (y_ + uvg)>> 16;
1229 r_ = (y_ + ur) >> 16;
1231 switch (frame->v4l2_format.format) {
1232 case V4L2_PIX_FMT_RGB565:
1235 (0x1F & LIMIT_RGB(r_)) |
1239 (0xF8 & LIMIT_RGB(b_));
1241 case V4L2_PIX_FMT_RGB24:
1242 *f_odd++ = LIMIT_RGB(r_);
1243 *f_odd++ = LIMIT_RGB(g_);
1244 *f_odd++ = LIMIT_RGB(b_);
1246 case V4L2_PIX_FMT_RGB32:
1247 *f_odd++ = LIMIT_RGB(r_);
1248 *f_odd++ = LIMIT_RGB(g_);
1249 *f_odd++ = LIMIT_RGB(b_);
1252 case V4L2_PIX_FMT_RGB555:
1254 *f_odd++ = (0x1F & LIMIT_RGB(r_)) |
1256 *f_odd++ = (0x03 & (g >> 3)) |
1257 (0x7C & (LIMIT_RGB(b_) << 2));
1261 clipmask_odd_index += clipmask_add;
1262 f_odd += stretch_bytes;
1265 scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size);
1266 scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size]
1268 scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size]
1270 scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size]
1274 scratch_rm_old(usbvision, pixel_per_line * 3 / 2
1275 + block_split * sub_block_size);
1277 frame->curline += 2 * usbvision->stretch_height;
1278 *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height;
1280 if (frame->curline >= frame->frmheight)
1281 return ParseState_NextFrame;
1283 return ParseState_Continue;
1287 * usbvision_parse_data()
1289 * Generic routine to parse the scratch buffer. It employs either
1290 * usbvision_find_header() or usbvision_parse_lines() to do most
1294 static void usbvision_parse_data(struct usb_usbvision *usbvision)
1296 struct usbvision_frame *frame;
1297 enum ParseState newstate;
1299 unsigned long lock_flags;
1301 frame = usbvision->curFrame;
1303 PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
1307 newstate = ParseState_Out;
1308 if (scratch_len(usbvision)) {
1309 if (frame->scanstate == ScanState_Scanning) {
1310 newstate = usbvision_find_header(usbvision);
1312 else if (frame->scanstate == ScanState_Lines) {
1313 if (usbvision->isocMode == ISOC_MODE_YUV420) {
1314 newstate = usbvision_parse_lines_420(usbvision, ©len);
1316 else if (usbvision->isocMode == ISOC_MODE_YUV422) {
1317 newstate = usbvision_parse_lines_422(usbvision, ©len);
1319 else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
1320 newstate = usbvision_parse_compress(usbvision, ©len);
1325 if (newstate == ParseState_Continue) {
1328 else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) {
1332 return; /* ParseState_EndParse */
1336 if (newstate == ParseState_NextFrame) {
1337 frame->grabstate = FrameState_Done;
1338 do_gettimeofday(&(frame->timestamp));
1339 frame->sequence = usbvision->frame_num;
1341 spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
1342 list_move_tail(&(frame->frame), &usbvision->outqueue);
1343 usbvision->curFrame = NULL;
1344 spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags);
1346 usbvision->frame_num++;
1348 /* This will cause the process to request another frame. */
1349 if (waitqueue_active(&usbvision->wait_frame)) {
1350 PDEBUG(DBG_PARSE, "Wake up !");
1351 wake_up_interruptible(&usbvision->wait_frame);
1355 frame->grabstate = FrameState_Grabbing;
1358 /* Update the frame's uncompressed length. */
1359 frame->scanlength += copylen;
1364 * Make all of the blocks of data contiguous
1366 static int usbvision_compress_isochronous(struct usb_usbvision *usbvision,
1369 unsigned char *packet_data;
1372 for (i = 0; i < urb->number_of_packets; i++) {
1373 int packet_len = urb->iso_frame_desc[i].actual_length;
1374 int packet_stat = urb->iso_frame_desc[i].status;
1376 packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset;
1378 /* Detect and ignore errored packets */
1379 if (packet_stat) { // packet_stat != 0 ?????????????
1380 PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat);
1381 usbvision->isocErrCount++;
1385 /* Detect and ignore empty packets */
1386 if (packet_len < 0) {
1387 PDEBUG(DBG_ISOC, "error packet [%d]", i);
1388 usbvision->isocSkipCount++;
1391 else if (packet_len == 0) { /* Frame end ????? */
1392 PDEBUG(DBG_ISOC, "null packet [%d]", i);
1393 usbvision->isocstate=IsocState_NoFrame;
1394 usbvision->isocSkipCount++;
1397 else if (packet_len > usbvision->isocPacketSize) {
1398 PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i);
1399 usbvision->isocSkipCount++;
1403 PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
1405 if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins
1406 usbvision->isocstate=IsocState_InFrame;
1407 scratch_mark_header(usbvision);
1408 usbvision_measure_bandwidth(usbvision);
1409 PDEBUG(DBG_ISOC, "packet with header");
1413 * If usbvision continues to feed us with data but there is no
1414 * consumption (if, for example, V4L client fell asleep) we
1415 * may overflow the buffer. We have to move old data over to
1416 * free room for new data. This is bad for old data. If we
1417 * just drop new data then it's bad for new data... choose
1418 * your favorite evil here.
1420 if (scratch_free(usbvision) < packet_len) {
1422 usbvision->scratch_ovf_count++;
1423 PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d",
1424 scratch_len(usbvision), packet_len);
1425 scratch_rm_old(usbvision, packet_len - scratch_free(usbvision));
1428 /* Now we know that there is enough room in scratch buffer */
1429 scratch_put(usbvision, packet_data, packet_len);
1430 totlen += packet_len;
1431 usbvision->isocDataCount += packet_len;
1432 usbvision->isocPacketCount++;
1438 printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen);
1439 usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen);
1447 static void usbvision_isocIrq(struct urb *urb)
1451 struct usb_usbvision *usbvision = urb->context;
1453 unsigned long startTime = jiffies;
1454 struct usbvision_frame **f;
1456 /* We don't want to do anything if we are about to be removed! */
1457 if (!USBVISION_IS_OPERATIONAL(usbvision))
1460 /* any urb with wrong status is ignored without acknowledgement */
1461 if (urb->status == -ENOENT) {
1465 f = &usbvision->curFrame;
1467 /* Manage streaming interruption */
1468 if (usbvision->streaming == Stream_Interrupt) {
1469 usbvision->streaming = Stream_Idle;
1471 (*f)->grabstate = FrameState_Ready;
1472 (*f)->scanstate = ScanState_Scanning;
1474 PDEBUG(DBG_IRQ, "stream interrupted");
1475 wake_up_interruptible(&usbvision->wait_stream);
1478 /* Copy the data received into our scratch buffer */
1479 len = usbvision_compress_isochronous(usbvision, urb);
1481 usbvision->isocUrbCount++;
1482 usbvision->urb_length = len;
1484 if (usbvision->streaming == Stream_On) {
1486 /* If we collected enough data let's parse! */
1487 if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) &&
1488 (!list_empty(&(usbvision->inqueue))) ) {
1490 (*f) = list_entry(usbvision->inqueue.next,
1491 struct usbvision_frame,
1494 usbvision_parse_data(usbvision);
1497 /*If we don't have a frame
1498 we're current working on, complain */
1500 "received data, but no one needs it");
1501 scratch_reset(usbvision);
1505 PDEBUG(DBG_IRQ, "received data, but no one needs it");
1506 scratch_reset(usbvision);
1509 usbvision->timeInIrq += jiffies - startTime;
1511 for (i = 0; i < USBVISION_URB_FRAMES; i++) {
1512 urb->iso_frame_desc[i].status = 0;
1513 urb->iso_frame_desc[i].actual_length = 0;
1517 urb->dev = usbvision->dev;
1518 errCode = usb_submit_urb (urb, GFP_ATOMIC);
1521 err("%s: usb_submit_urb failed: error %d",
1528 /*************************************/
1529 /* Low level usbvision access functions */
1530 /*************************************/
1533 * usbvision_read_reg()
1535 * return < 0 -> Error
1539 int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg)
1542 unsigned char buffer[1];
1544 if (!USBVISION_IS_OPERATIONAL(usbvision))
1547 errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1),
1549 USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1550 0, (__u16) reg, buffer, 1, HZ);
1553 err("%s: failed: error %d", __func__, errCode);
1560 * usbvision_write_reg()
1562 * return 1 -> Reg written
1563 * 0 -> usbvision is not yet ready
1564 * -1 -> Something went wrong
1567 int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg,
1568 unsigned char value)
1572 if (!USBVISION_IS_OPERATIONAL(usbvision))
1575 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1577 USB_DIR_OUT | USB_TYPE_VENDOR |
1578 USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ);
1581 err("%s: failed: error %d", __func__, errCode);
1587 static void usbvision_ctrlUrb_complete(struct urb *urb)
1589 struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
1591 PDEBUG(DBG_IRQ, "");
1592 usbvision->ctrlUrbBusy = 0;
1593 if (waitqueue_active(&usbvision->ctrlUrb_wq)) {
1594 wake_up_interruptible(&usbvision->ctrlUrb_wq);
1599 static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address,
1600 unsigned char *data, int len)
1604 PDEBUG(DBG_IRQ, "");
1608 if (usbvision->ctrlUrbBusy) {
1611 usbvision->ctrlUrbBusy = 1;
1613 usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
1614 usbvision->ctrlUrbSetup.bRequest = USBVISION_OP_CODE;
1615 usbvision->ctrlUrbSetup.wValue = 0;
1616 usbvision->ctrlUrbSetup.wIndex = cpu_to_le16(address);
1617 usbvision->ctrlUrbSetup.wLength = cpu_to_le16(len);
1618 usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev,
1619 usb_sndctrlpipe(usbvision->dev, 1),
1620 (unsigned char *)&usbvision->ctrlUrbSetup,
1621 (void *)usbvision->ctrlUrbBuffer, len,
1622 usbvision_ctrlUrb_complete,
1625 memcpy(usbvision->ctrlUrbBuffer, data, len);
1627 errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC);
1629 // error in usb_submit_urb()
1630 usbvision->ctrlUrbBusy = 0;
1632 PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode);
1637 static int usbvision_init_compression(struct usb_usbvision *usbvision)
1641 usbvision->lastIsocFrameNum = -1;
1642 usbvision->isocDataCount = 0;
1643 usbvision->isocPacketCount = 0;
1644 usbvision->isocSkipCount = 0;
1645 usbvision->comprLevel = 50;
1646 usbvision->lastComprLevel = -1;
1647 usbvision->isocUrbCount = 0;
1648 usbvision->requestIntra = 1;
1649 usbvision->isocMeasureBandwidthCount = 0;
1654 /* this function measures the used bandwidth since last call
1655 * return: 0 : no error
1656 * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize
1658 static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision)
1662 if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames
1663 usbvision->isocMeasureBandwidthCount++;
1666 if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) {
1667 usbvision->usedBandwidth = usbvision->isocDataCount /
1668 (usbvision->isocPacketCount + usbvision->isocSkipCount) *
1669 100 / usbvision->isocPacketSize;
1671 usbvision->isocMeasureBandwidthCount = 0;
1672 usbvision->isocDataCount = 0;
1673 usbvision->isocPacketCount = 0;
1674 usbvision->isocSkipCount = 0;
1678 static int usbvision_adjust_compression (struct usb_usbvision *usbvision)
1681 unsigned char buffer[6];
1683 PDEBUG(DBG_IRQ, "");
1684 if ((adjustCompression) && (usbvision->usedBandwidth > 0)) {
1685 usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2;
1686 RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100);
1687 if (usbvision->comprLevel != usbvision->lastComprLevel) {
1689 if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) {
1690 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM Threshold 1
1691 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM Threshold 2
1692 distorsion = 7 + 248 * usbvision->comprLevel / 100;
1693 buffer[2] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (inter)
1694 buffer[3] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (intra)
1695 distorsion = 1 + 42 * usbvision->comprLevel / 100;
1696 buffer[4] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (inter)
1697 buffer[5] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (intra)
1699 else { //BRIDGE_NT1003
1700 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM threshold 1
1701 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM threshold 2
1702 distorsion = 2 + 253 * usbvision->comprLevel / 100;
1703 buffer[2] = (unsigned char)(distorsion & 0xFF); // distorsion threshold bit0-7
1704 buffer[3] = 0; //(unsigned char)((distorsion >> 8) & 0x0F); // distorsion threshold bit 8-11
1705 distorsion = 0 + 43 * usbvision->comprLevel / 100;
1706 buffer[4] = (unsigned char)(distorsion & 0xFF); // maximum distorsion bit0-7
1707 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01); // maximum distorsion bit 8
1709 errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
1711 PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0],
1712 buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]);
1713 usbvision->lastComprLevel = usbvision->comprLevel;
1720 static int usbvision_request_intra (struct usb_usbvision *usbvision)
1723 unsigned char buffer[1];
1725 PDEBUG(DBG_IRQ, "");
1726 usbvision->requestIntra = 1;
1728 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1732 static int usbvision_unrequest_intra (struct usb_usbvision *usbvision)
1735 unsigned char buffer[1];
1737 PDEBUG(DBG_IRQ, "");
1738 usbvision->requestIntra = 0;
1740 usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
1744 /*******************************
1745 * usbvision utility functions
1746 *******************************/
1748 int usbvision_power_off(struct usb_usbvision *usbvision)
1752 PDEBUG(DBG_FUNC, "");
1754 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
1756 usbvision->power = 0;
1758 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode);
1763 * usbvision_set_video_format()
1766 static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
1768 static const char proc[] = "usbvision_set_video_format";
1770 unsigned char value[2];
1772 if (!USBVISION_IS_OPERATIONAL(usbvision))
1775 PDEBUG(DBG_FUNC, "isocMode %#02x", format);
1777 if ((format != ISOC_MODE_YUV422)
1778 && (format != ISOC_MODE_YUV420)
1779 && (format != ISOC_MODE_COMPRESS)) {
1780 printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420",
1782 format = ISOC_MODE_YUV420;
1784 value[0] = 0x0A; //TODO: See the effect of the filter
1785 value[1] = format; // Sets the VO_MODE register which follows FILT_CONT
1786 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1788 USB_DIR_OUT | USB_TYPE_VENDOR |
1789 USB_RECIP_ENDPOINT, 0,
1790 (__u16) USBVISION_FILT_CONT, value, 2, HZ);
1793 printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - "
1794 "reconnect or reload driver.\n", proc, rc);
1796 usbvision->isocMode = format;
1801 * usbvision_set_output()
1805 int usbvision_set_output(struct usb_usbvision *usbvision, int width,
1809 int UsbWidth, UsbHeight;
1810 unsigned int frameRate=0, frameDrop=0;
1811 unsigned char value[4];
1813 if (!USBVISION_IS_OPERATIONAL(usbvision)) {
1817 if (width > MAX_USB_WIDTH) {
1818 UsbWidth = width / 2;
1819 usbvision->stretch_width = 2;
1823 usbvision->stretch_width = 1;
1826 if (height > MAX_USB_HEIGHT) {
1827 UsbHeight = height / 2;
1828 usbvision->stretch_height = 2;
1832 usbvision->stretch_height = 1;
1835 RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
1836 UsbWidth &= ~(MIN_FRAME_WIDTH-1);
1837 RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
1840 PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
1841 UsbWidth, UsbHeight, width, height,
1842 usbvision->stretch_width, usbvision->stretch_height);
1844 /* I'll not rewrite the same values */
1845 if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) {
1846 value[0] = UsbWidth & 0xff; //LSB
1847 value[1] = (UsbWidth >> 8) & 0x03; //MSB
1848 value[2] = UsbHeight & 0xff; //LSB
1849 value[3] = (UsbHeight >> 8) & 0x03; //MSB
1851 errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
1853 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT,
1854 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ);
1857 err("%s failed: error %d", __func__, errCode);
1860 usbvision->curwidth = usbvision->stretch_width * UsbWidth;
1861 usbvision->curheight = usbvision->stretch_height * UsbHeight;
1864 if (usbvision->isocMode == ISOC_MODE_YUV422) {
1865 frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2);
1867 else if (usbvision->isocMode == ISOC_MODE_YUV420) {
1868 frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8);
1871 frameRate = FRAMERATE_MAX;
1874 if (usbvision->tvnormId & V4L2_STD_625_50) {
1875 frameDrop = frameRate * 32 / 25 - 1;
1877 else if (usbvision->tvnormId & V4L2_STD_525_60) {
1878 frameDrop = frameRate * 32 / 30 - 1;
1881 RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX);
1883 PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop);
1885 frameDrop = FRAMERATE_MAX; // We can allow the maximum here, because dropping is controlled
1887 /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
1889 => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
1891 frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
1892 => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
1893 => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
1895 errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop);
1901 * usbvision_frames_alloc
1902 * allocate the required frames
1904 int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames)
1908 /*needs to be page aligned cause the buffers can be mapped individually! */
1909 usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth *
1910 usbvision->curheight *
1911 usbvision->palette.bytes_per_pixel);
1913 /* Try to do my best to allocate the frames the user want in the remaining memory */
1914 usbvision->num_frames = number_of_frames;
1915 while (usbvision->num_frames > 0) {
1916 usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size;
1917 if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) {
1920 usbvision->num_frames--;
1923 spin_lock_init(&usbvision->queue_lock);
1924 init_waitqueue_head(&usbvision->wait_frame);
1925 init_waitqueue_head(&usbvision->wait_stream);
1927 /* Allocate all buffers */
1928 for (i = 0; i < usbvision->num_frames; i++) {
1929 usbvision->frame[i].index = i;
1930 usbvision->frame[i].grabstate = FrameState_Unused;
1931 usbvision->frame[i].data = usbvision->fbuf +
1932 i * usbvision->max_frame_size;
1934 * Set default sizes for read operation.
1936 usbvision->stretch_width = 1;
1937 usbvision->stretch_height = 1;
1938 usbvision->frame[i].width = usbvision->curwidth;
1939 usbvision->frame[i].height = usbvision->curheight;
1940 usbvision->frame[i].bytes_read = 0;
1942 PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size);
1943 return usbvision->num_frames;
1947 * usbvision_frames_free
1948 * frees memory allocated for the frames
1950 void usbvision_frames_free(struct usb_usbvision *usbvision)
1952 /* Have to free all that memory */
1953 PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames);
1955 if (usbvision->fbuf != NULL) {
1956 usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size);
1957 usbvision->fbuf = NULL;
1959 usbvision->num_frames = 0;
1963 * usbvision_empty_framequeues()
1964 * prepare queues for incoming and outgoing frames
1966 void usbvision_empty_framequeues(struct usb_usbvision *usbvision)
1970 INIT_LIST_HEAD(&(usbvision->inqueue));
1971 INIT_LIST_HEAD(&(usbvision->outqueue));
1973 for (i = 0; i < USBVISION_NUMFRAMES; i++) {
1974 usbvision->frame[i].grabstate = FrameState_Unused;
1975 usbvision->frame[i].bytes_read = 0;
1980 * usbvision_stream_interrupt()
1983 int usbvision_stream_interrupt(struct usb_usbvision *usbvision)
1987 /* stop reading from the device */
1989 usbvision->streaming = Stream_Interrupt;
1990 ret = wait_event_timeout(usbvision->wait_stream,
1991 (usbvision->streaming == Stream_Idle),
1992 msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES));
1997 * usbvision_set_compress_params()
2001 static int usbvision_set_compress_params(struct usb_usbvision *usbvision)
2003 static const char proc[] = "usbvision_set_compresion_params: ";
2005 unsigned char value[6];
2007 value[0] = 0x0F; // Intra-Compression cycle
2008 value[1] = 0x01; // Reg.45 one line per strip
2009 value[2] = 0x00; // Reg.46 Force intra mode on all new frames
2010 value[3] = 0x00; // Reg.47 FORCE_UP <- 0 normal operation (not force)
2011 value[4] = 0xA2; // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode.
2012 value[5] = 0x00; // Reg.49 DVI_YUV This has nothing to do with compression
2014 //catched values for NT1004
2015 // value[0] = 0xFF; // Never apply intra mode automatically
2016 // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip
2017 // value[2] = 0x01; // Force intra mode on all new frames
2018 // value[3] = 0x00; // Strip size 400 Bytes; do not force up
2019 // value[4] = 0xA2; //
2020 if (!USBVISION_IS_OPERATIONAL(usbvision))
2023 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2025 USB_DIR_OUT | USB_TYPE_VENDOR |
2026 USB_RECIP_ENDPOINT, 0,
2027 (__u16) USBVISION_INTRA_CYC, value, 5, HZ);
2030 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2031 "reconnect or reload driver.\n", proc, rc);
2035 if (usbvision->bridgeType == BRIDGE_NT1004) {
2036 value[0] = 20; // PCM Threshold 1
2037 value[1] = 12; // PCM Threshold 2
2038 value[2] = 255; // Distorsion Threshold inter
2039 value[3] = 255; // Distorsion Threshold intra
2040 value[4] = 43; // Max Distorsion inter
2041 value[5] = 43; // Max Distorsion intra
2044 value[0] = 20; // PCM Threshold 1
2045 value[1] = 12; // PCM Threshold 2
2046 value[2] = 255; // Distorsion Threshold d7-d0
2047 value[3] = 0; // Distorsion Threshold d11-d8
2048 value[4] = 43; // Max Distorsion d7-d0
2049 value[5] = 0; // Max Distorsion d8
2052 if (!USBVISION_IS_OPERATIONAL(usbvision))
2055 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2057 USB_DIR_OUT | USB_TYPE_VENDOR |
2058 USB_RECIP_ENDPOINT, 0,
2059 (__u16) USBVISION_PCM_THR1, value, 6, HZ);
2062 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2063 "reconnect or reload driver.\n", proc, rc);
2073 * usbvision_set_input()
2075 * Set the input (saa711x, ...) size x y and other misc input params
2076 * I've no idea if this parameters are right
2079 int usbvision_set_input(struct usb_usbvision *usbvision)
2081 static const char proc[] = "usbvision_set_input: ";
2083 unsigned char value[8];
2084 unsigned char dvi_yuv_value;
2086 if (!USBVISION_IS_OPERATIONAL(usbvision))
2089 /* Set input format expected from decoder*/
2090 if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) {
2091 value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1;
2092 } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2093 /* SAA7113 uses 8 bit output */
2094 value[0] = USBVISION_8_422_SYNC;
2096 /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses
2097 * as that is how saa7111 is configured */
2098 value[0] = USBVISION_16_422_SYNC;
2099 /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/
2102 rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]);
2104 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2105 "reconnect or reload driver.\n", proc, rc);
2110 if (usbvision->tvnormId & V4L2_STD_PAL) {
2112 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2114 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2116 value[5] = 0x00; //0x0060 -> 96 Input video h offset
2118 value[7] = 0x00; //0x0016 -> 22 Input video v offset
2119 } else if (usbvision->tvnormId & V4L2_STD_SECAM) {
2121 value[1] = 0x02; //0x02C0 -> 704 Input video line length
2123 value[3] = 0x01; //0x0120 -> 288 Input video n. of lines
2125 value[5] = 0x00; //0x0001 -> 01 Input video h offset
2127 value[7] = 0x00; //0x0001 -> 01 Input video v offset
2128 } else { /* V4L2_STD_NTSC */
2130 value[1] = 0x02; //0x02D0 -> 720 Input video line length
2132 value[3] = 0x00; //0x00F0 -> 240 Input video number of lines
2134 value[5] = 0x00; //0x0050 -> 80 Input video h offset
2136 value[7] = 0x00; //0x0010 -> 16 Input video v offset
2139 if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) {
2140 value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff;
2141 value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8;
2144 if (adjust_X_Offset != -1) {
2145 value[4] = adjust_X_Offset & 0xff;
2146 value[5] = (adjust_X_Offset & 0x0300) >> 8;
2149 if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) {
2150 value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff;
2151 value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8;
2154 if (adjust_Y_Offset != -1) {
2155 value[6] = adjust_Y_Offset & 0xff;
2156 value[7] = (adjust_Y_Offset & 0x0300) >> 8;
2159 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2160 USBVISION_OP_CODE, /* USBVISION specific code */
2161 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0,
2162 (__u16) USBVISION_LXSIZE_I, value, 8, HZ);
2164 printk(KERN_ERR "%sERROR=%d. USBVISION stopped - "
2165 "reconnect or reload driver.\n", proc, rc);
2170 dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */
2172 if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){
2173 dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv;
2175 else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) {
2176 /* This changes as the fine sync control changes. Further investigation necessary */
2177 dvi_yuv_value = 0x06;
2180 return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value));
2185 * usbvision_set_dram_settings()
2187 * Set the buffer address needed by the usbvision dram to operate
2188 * This values has been taken with usbsnoop.
2192 static int usbvision_set_dram_settings(struct usb_usbvision *usbvision)
2195 unsigned char value[8];
2197 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2206 // UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte)
2207 // FDL: 0x00000-0x0E099 = 57498 Words
2208 // VDW: 0x0E3FF-0x3FFFF
2220 /* These are the values of the address of the video buffer,
2221 * they have to be loaded into the USBVISION_DRM_PRM1-8
2223 * Start address of video output buffer for read: drm_prm1-2 -> 0x00000
2224 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff
2225 * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000
2226 * Only used in compressed mode
2227 * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff
2228 * Only used in compressed mode
2229 * Start address of video output buffer for write: drm_prm1-7 -> 0x00000
2230 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff
2233 if (!USBVISION_IS_OPERATIONAL(usbvision))
2236 rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1),
2237 USBVISION_OP_CODE, /* USBVISION specific code */
2238 USB_DIR_OUT | USB_TYPE_VENDOR |
2239 USB_RECIP_ENDPOINT, 0,
2240 (__u16) USBVISION_DRM_PRM1, value, 8, HZ);
2243 err("%sERROR=%d", __func__, rc);
2247 /* Restart the video buffer logic */
2248 if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
2249 USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0)
2251 rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00);
2259 * Power on the device, enables suspend-resume logic
2260 * & reset the isoc End-Point
2264 int usbvision_power_on(struct usb_usbvision *usbvision)
2268 PDEBUG(DBG_FUNC, "");
2270 usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
2271 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2272 USBVISION_SSPND_EN | USBVISION_RES2);
2274 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2275 USBVISION_SSPND_EN | USBVISION_PWR_VID);
2276 errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2277 USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
2279 usbvision->power = 1;
2281 PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode);
2287 * usbvision timer stuff
2290 // to call usbvision_power_off from task queue
2291 static void call_usbvision_power_off(struct work_struct *work)
2293 struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork);
2295 PDEBUG(DBG_FUNC, "");
2296 if(mutex_lock_interruptible(&usbvision->lock)) {
2301 if(usbvision->user == 0) {
2302 usbvision_i2c_unregister(usbvision);
2304 usbvision_power_off(usbvision);
2305 usbvision->initialized = 0;
2307 mutex_unlock(&usbvision->lock);
2310 static void usbvision_powerOffTimer(unsigned long data)
2312 struct usb_usbvision *usbvision = (void *) data;
2314 PDEBUG(DBG_FUNC, "");
2315 del_timer(&usbvision->powerOffTimer);
2316 INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off);
2317 (void) schedule_work(&usbvision->powerOffWork);
2320 void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision)
2322 init_timer(&usbvision->powerOffTimer);
2323 usbvision->powerOffTimer.data = (long) usbvision;
2324 usbvision->powerOffTimer.function = usbvision_powerOffTimer;
2327 void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision)
2329 mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME);
2332 void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision)
2334 if (timer_pending(&usbvision->powerOffTimer)) {
2335 del_timer(&usbvision->powerOffTimer);
2340 * usbvision_begin_streaming()
2341 * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no
2342 * idea about the rest
2344 int usbvision_begin_streaming(struct usb_usbvision *usbvision)
2348 if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
2349 usbvision_init_compression(usbvision);
2351 errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID |
2352 usbvision->Vin_Reg2_Preset);
2357 * usbvision_restart_isoc()
2358 * Not sure yet if touching here PWR_REG make loose the config
2361 int usbvision_restart_isoc(struct usb_usbvision *usbvision)
2367 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2368 USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0)
2372 usbvision_write_reg(usbvision, USBVISION_PWR_REG,
2373 USBVISION_SSPND_EN | USBVISION_PWR_VID |
2374 USBVISION_RES2)) < 0)
2378 usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
2379 USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
2380 usbvision->Vin_Reg2_Preset)) < 0) return ret;
2382 /* TODO: schedule timeout */
2383 while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1);
2388 int usbvision_audio_off(struct usb_usbvision *usbvision)
2390 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) {
2391 printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n");
2394 usbvision->AudioMute = 0;
2395 usbvision->AudioChannel = USBVISION_AUDIO_MUTE;
2399 int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel)
2401 if (!usbvision->AudioMute) {
2402 if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) {
2403 printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
2407 usbvision->AudioChannel = AudioChannel;
2411 int usbvision_setup(struct usb_usbvision *usbvision,int format)
2413 usbvision_set_video_format(usbvision, format);
2414 usbvision_set_dram_settings(usbvision);
2415 usbvision_set_compress_params(usbvision);
2416 usbvision_set_input(usbvision);
2417 usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT);
2418 usbvision_restart_isoc(usbvision);
2421 return USBVISION_IS_OPERATIONAL(usbvision);
2424 int usbvision_set_alternate(struct usb_usbvision *dev)
2426 int errCode, prev_alt = dev->ifaceAlt;
2430 for(i=0;i< dev->num_alt; i++)
2431 if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt])
2434 if (dev->ifaceAlt != prev_alt) {
2435 dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt];
2436 PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize);
2437 errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt);
2439 err ("cannot change alternate number to %d (error=%i)",
2440 dev->ifaceAlt, errCode);
2445 PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize);
2451 * usbvision_init_isoc()
2454 int usbvision_init_isoc(struct usb_usbvision *usbvision)
2456 struct usb_device *dev = usbvision->dev;
2457 int bufIdx, errCode, regValue;
2460 if (!USBVISION_IS_OPERATIONAL(usbvision))
2463 usbvision->curFrame = NULL;
2464 scratch_reset(usbvision);
2466 /* Alternate interface 1 is is the biggest frame size */
2467 errCode = usbvision_set_alternate(usbvision);
2469 usbvision->last_error = errCode;
2472 sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2474 regValue = (16 - usbvision_read_reg(usbvision,
2475 USBVISION_ALTER_REG)) & 0x0F;
2477 usbvision->usb_bandwidth = regValue >> 1;
2478 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2479 usbvision->usb_bandwidth);
2483 /* We double buffer the Iso lists */
2485 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2489 urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
2491 err("%s: usb_alloc_urb() failed", __func__);
2494 usbvision->sbuf[bufIdx].urb = urb;
2495 usbvision->sbuf[bufIdx].data =
2496 usb_buffer_alloc(usbvision->dev,
2499 &urb->transfer_dma);
2501 urb->context = usbvision;
2502 urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp);
2503 urb->transfer_flags = URB_ISO_ASAP;
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;
2518 /* Submit all URBs */
2519 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2520 errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb,
2523 err("%s: usb_submit_urb(%d) failed: error %d",
2524 __func__, bufIdx, errCode);
2528 usbvision->streaming = Stream_Idle;
2529 PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
2531 usbvision->video_endp);
2536 * usbvision_stop_isoc()
2538 * This procedure stops streaming and deallocates URBs. Then it
2539 * activates zero-bandwidth alt. setting of the video interface.
2542 void usbvision_stop_isoc(struct usb_usbvision *usbvision)
2544 int bufIdx, errCode, regValue;
2545 int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize;
2547 if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL))
2550 /* Unschedule all of the iso td's */
2551 for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) {
2552 usb_kill_urb(usbvision->sbuf[bufIdx].urb);
2553 if (usbvision->sbuf[bufIdx].data){
2554 usb_buffer_free(usbvision->dev,
2556 usbvision->sbuf[bufIdx].data,
2557 usbvision->sbuf[bufIdx].urb->transfer_dma);
2559 usb_free_urb(usbvision->sbuf[bufIdx].urb);
2560 usbvision->sbuf[bufIdx].urb = NULL;
2563 PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __func__);
2564 usbvision->streaming = Stream_Off;
2566 if (!usbvision->remove_pending) {
2568 /* Set packet size to 0 */
2569 usbvision->ifaceAlt=0;
2570 errCode = usb_set_interface(usbvision->dev, usbvision->iface,
2571 usbvision->ifaceAlt);
2573 err("%s: usb_set_interface() failed: error %d",
2575 usbvision->last_error = errCode;
2577 regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
2578 usbvision->isocPacketSize =
2579 (regValue == 0) ? 0 : (regValue * 64) - 1;
2580 PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
2581 usbvision->isocPacketSize);
2583 usbvision->usb_bandwidth = regValue >> 1;
2584 PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
2585 usbvision->usb_bandwidth);
2589 int usbvision_muxsel(struct usb_usbvision *usbvision, int channel)
2591 /* inputs #0 and #3 are constant for every SAA711x. */
2592 /* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
2593 int mode[4]= {SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3};
2594 int audio[]= {1, 0, 0, 0};
2595 struct v4l2_routing route;
2596 //channel 0 is TV with audiochannel 1 (tuner mono)
2597 //channel 1 is Composite with audio channel 0 (line in)
2598 //channel 2 is S-Video with audio channel 0 (line in)
2599 //channel 3 is additional video inputs to the device with audio channel 0 (line in)
2601 RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs);
2602 usbvision->ctl_input = channel;
2604 // set the new channel
2605 // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video
2606 // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red
2608 switch (usbvision_device_data[usbvision->DevModel].Codec) {
2610 mode[1] = SAA7115_COMPOSITE2;
2611 if (SwitchSVideoInput) {
2612 /* To handle problems with S-Video Input for
2613 * some devices. Use SwitchSVideoInput
2614 * parameter when loading the module.*/
2615 mode[2] = SAA7115_COMPOSITE1;
2618 mode[2] = SAA7115_SVIDEO1;
2623 /* modes for saa7111 */
2624 mode[1] = SAA7115_COMPOSITE1;
2625 mode[2] = SAA7115_SVIDEO1;
2628 route.input = mode[channel];
2630 call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
2631 usbvision_set_audio(usbvision, audio[channel]);
2636 * Overrides for Emacs so that we follow Linus's tabbing style.
2637 * ---------------------------------------------------------------------------