/* * usbvision-core.c - driver for NT100x USB video capture devices * * * Copyright (c) 1999-2005 Joerg Heckenbach * Dwaine Garden * * This module is part of usbvision driver project. * Updates to driver completed by Dwaine P. Garden * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_KMOD #include #endif #include "usbvision.h" static unsigned int core_debug = 0; module_param(core_debug,int,0644); MODULE_PARM_DESC(core_debug,"enable debug messages [core]"); static unsigned int force_testpattern = 0; module_param(force_testpattern,int,0644); MODULE_PARM_DESC(force_testpattern,"enable test pattern display [core]"); static int adjustCompression = 1; // Set the compression to be adaptive module_param(adjustCompression, int, 0444); MODULE_PARM_DESC(adjustCompression, " Set the ADPCM compression for the device. Default: 1 (On)"); static int SwitchSVideoInput = 0; // To help people with Black and White output with using s-video input. Some cables and input device are wired differently. module_param(SwitchSVideoInput, int, 0444); MODULE_PARM_DESC(SwitchSVideoInput, " Set the S-Video input. Some cables and input device are wired differently. Default: 0 (Off)"); #define ENABLE_HEXDUMP 0 /* Enable if you need it */ #ifdef USBVISION_DEBUG #define PDEBUG(level, fmt, args...) \ if (core_debug & (level)) info("[%s:%d] " fmt, __PRETTY_FUNCTION__, __LINE__ , ## args) #else #define PDEBUG(level, fmt, args...) do {} while(0) #endif #define DBG_HEADER 1<<0 #define DBG_IRQ 1<<1 #define DBG_ISOC 1<<2 #define DBG_PARSE 1<<3 #define DBG_SCRATCH 1<<4 #define DBG_FUNC 1<<5 static const int max_imgwidth = MAX_FRAME_WIDTH; static const int max_imgheight = MAX_FRAME_HEIGHT; static const int min_imgwidth = MIN_FRAME_WIDTH; static const int min_imgheight = MIN_FRAME_HEIGHT; /* The value of 'scratch_buf_size' affects quality of the picture * in many ways. Shorter buffers may cause loss of data when client * is too slow. Larger buffers are memory-consuming and take longer * to work with. This setting can be adjusted, but the default value * should be OK for most desktop users. */ #define DEFAULT_SCRATCH_BUF_SIZE (0x20000) // 128kB memory scratch buffer static const int scratch_buf_size = DEFAULT_SCRATCH_BUF_SIZE; // Function prototypes static int usbvision_request_intra (struct usb_usbvision *usbvision); static int usbvision_unrequest_intra (struct usb_usbvision *usbvision); static int usbvision_adjust_compression (struct usb_usbvision *usbvision); static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision); /*******************************/ /* Memory management functions */ /*******************************/ /* * Here we want the physical address of the memory. * This is used when initializing the contents of the area. */ static void *usbvision_rvmalloc(unsigned long size) { void *mem; unsigned long adr; size = PAGE_ALIGN(size); mem = vmalloc_32(size); if (!mem) return NULL; memset(mem, 0, size); /* Clear the ram out, no junk to the user */ adr = (unsigned long) mem; while (size > 0) { SetPageReserved(vmalloc_to_page((void *)adr)); adr += PAGE_SIZE; size -= PAGE_SIZE; } return mem; } static void usbvision_rvfree(void *mem, unsigned long size) { unsigned long adr; if (!mem) return; size = PAGE_ALIGN(size); adr = (unsigned long) mem; while ((long) size > 0) { ClearPageReserved(vmalloc_to_page((void *)adr)); adr += PAGE_SIZE; size -= PAGE_SIZE; } vfree(mem); } #if ENABLE_HEXDUMP static void usbvision_hexdump(const unsigned char *data, int len) { char tmp[80]; int i, k; for (i = k = 0; len > 0; i++, len--) { if (i > 0 && (i % 16 == 0)) { printk("%s\n", tmp); k = 0; } k += sprintf(&tmp[k], "%02x ", data[i]); } if (k > 0) printk("%s\n", tmp); } #endif /******************************** * scratch ring buffer handling ********************************/ static int scratch_len(struct usb_usbvision *usbvision) /*This returns the amount of data actually in the buffer */ { int len = usbvision->scratch_write_ptr - usbvision->scratch_read_ptr; if (len < 0) { len += scratch_buf_size; } PDEBUG(DBG_SCRATCH, "scratch_len() = %d\n", len); return len; } /* This returns the free space left in the buffer */ static int scratch_free(struct usb_usbvision *usbvision) { int free = usbvision->scratch_read_ptr - usbvision->scratch_write_ptr; if (free <= 0) { free += scratch_buf_size; } if (free) { free -= 1; /* at least one byte in the buffer must */ /* left blank, otherwise there is no chance to differ between full and empty */ } PDEBUG(DBG_SCRATCH, "return %d\n", free); return free; } /* This puts data into the buffer */ static int scratch_put(struct usb_usbvision *usbvision, unsigned char *data, int len) { int len_part; if (usbvision->scratch_write_ptr + len < scratch_buf_size) { memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len); usbvision->scratch_write_ptr += len; } else { len_part = scratch_buf_size - usbvision->scratch_write_ptr; memcpy(usbvision->scratch + usbvision->scratch_write_ptr, data, len_part); if (len == len_part) { usbvision->scratch_write_ptr = 0; /* just set write_ptr to zero */ } else { memcpy(usbvision->scratch, data + len_part, len - len_part); usbvision->scratch_write_ptr = len - len_part; } } PDEBUG(DBG_SCRATCH, "len=%d, new write_ptr=%d\n", len, usbvision->scratch_write_ptr); return len; } /* This marks the write_ptr as position of new frame header */ static void scratch_mark_header(struct usb_usbvision *usbvision) { PDEBUG(DBG_SCRATCH, "header at write_ptr=%d\n", usbvision->scratch_headermarker_write_ptr); usbvision->scratch_headermarker[usbvision->scratch_headermarker_write_ptr] = usbvision->scratch_write_ptr; usbvision->scratch_headermarker_write_ptr += 1; usbvision->scratch_headermarker_write_ptr %= USBVISION_NUM_HEADERMARKER; } /* This gets data from the buffer at the given "ptr" position */ static int scratch_get_extra(struct usb_usbvision *usbvision, unsigned char *data, int *ptr, int len) { int len_part; if (*ptr + len < scratch_buf_size) { memcpy(data, usbvision->scratch + *ptr, len); *ptr += len; } else { len_part = scratch_buf_size - *ptr; memcpy(data, usbvision->scratch + *ptr, len_part); if (len == len_part) { *ptr = 0; /* just set the y_ptr to zero */ } else { memcpy(data + len_part, usbvision->scratch, len - len_part); *ptr = len - len_part; } } PDEBUG(DBG_SCRATCH, "len=%d, new ptr=%d\n", len, *ptr); return len; } /* This sets the scratch extra read pointer */ static void scratch_set_extra_ptr(struct usb_usbvision *usbvision, int *ptr, int len) { *ptr = (usbvision->scratch_read_ptr + len)%scratch_buf_size; PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr); } /*This increments the scratch extra read pointer */ static void scratch_inc_extra_ptr(int *ptr, int len) { *ptr = (*ptr + len) % scratch_buf_size; PDEBUG(DBG_SCRATCH, "ptr=%d\n", *ptr); } /* This gets data from the buffer */ static int scratch_get(struct usb_usbvision *usbvision, unsigned char *data, int len) { int len_part; if (usbvision->scratch_read_ptr + len < scratch_buf_size) { memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len); usbvision->scratch_read_ptr += len; } else { len_part = scratch_buf_size - usbvision->scratch_read_ptr; memcpy(data, usbvision->scratch + usbvision->scratch_read_ptr, len_part); if (len == len_part) { usbvision->scratch_read_ptr = 0; /* just set the read_ptr to zero */ } else { memcpy(data + len_part, usbvision->scratch, len - len_part); usbvision->scratch_read_ptr = len - len_part; } } PDEBUG(DBG_SCRATCH, "len=%d, new read_ptr=%d\n", len, usbvision->scratch_read_ptr); return len; } /* This sets read pointer to next header and returns it */ static int scratch_get_header(struct usb_usbvision *usbvision, struct usbvision_frame_header *header) { int errCode = 0; PDEBUG(DBG_SCRATCH, "from read_ptr=%d", usbvision->scratch_headermarker_read_ptr); while (usbvision->scratch_headermarker_write_ptr - usbvision->scratch_headermarker_read_ptr != 0) { usbvision->scratch_read_ptr = usbvision->scratch_headermarker[usbvision->scratch_headermarker_read_ptr]; usbvision->scratch_headermarker_read_ptr += 1; usbvision->scratch_headermarker_read_ptr %= USBVISION_NUM_HEADERMARKER; scratch_get(usbvision, (unsigned char *)header, USBVISION_HEADER_LENGTH); if ((header->magic_1 == USBVISION_MAGIC_1) && (header->magic_2 == USBVISION_MAGIC_2) && (header->headerLength == USBVISION_HEADER_LENGTH)) { errCode = USBVISION_HEADER_LENGTH; header->frameWidth = header->frameWidthLo + (header->frameWidthHi << 8); header->frameHeight = header->frameHeightLo + (header->frameHeightHi << 8); break; } } return errCode; } /*This removes len bytes of old data from the buffer */ static void scratch_rm_old(struct usb_usbvision *usbvision, int len) { usbvision->scratch_read_ptr += len; usbvision->scratch_read_ptr %= scratch_buf_size; PDEBUG(DBG_SCRATCH, "read_ptr is now %d\n", usbvision->scratch_read_ptr); } /*This resets the buffer - kills all data in it too */ static void scratch_reset(struct usb_usbvision *usbvision) { PDEBUG(DBG_SCRATCH, "\n"); usbvision->scratch_read_ptr = 0; usbvision->scratch_write_ptr = 0; usbvision->scratch_headermarker_read_ptr = 0; usbvision->scratch_headermarker_write_ptr = 0; usbvision->isocstate = IsocState_NoFrame; } int usbvision_scratch_alloc(struct usb_usbvision *usbvision) { usbvision->scratch = vmalloc_32(scratch_buf_size); scratch_reset(usbvision); if(usbvision->scratch == NULL) { err("%s: unable to allocate %d bytes for scratch", __FUNCTION__, scratch_buf_size); return -ENOMEM; } return 0; } void usbvision_scratch_free(struct usb_usbvision *usbvision) { if (usbvision->scratch != NULL) { vfree(usbvision->scratch); usbvision->scratch = NULL; } } /* * usbvision_testpattern() * * Procedure forms a test pattern (yellow grid on blue background). * * Parameters: * fullframe: if TRUE then entire frame is filled, otherwise the procedure * continues from the current scanline. * pmode 0: fill the frame with solid blue color (like on VCR or TV) * 1: Draw a colored grid * */ static void usbvision_testpattern(struct usb_usbvision *usbvision, int fullframe, int pmode) { static const char proc[] = "usbvision_testpattern"; struct usbvision_frame *frame; unsigned char *f; int num_cell = 0; int scan_length = 0; static int num_pass = 0; if (usbvision == NULL) { printk(KERN_ERR "%s: usbvision == NULL\n", proc); return; } if (usbvision->curFrame == NULL) { printk(KERN_ERR "%s: usbvision->curFrame is NULL.\n", proc); return; } /* Grab the current frame */ frame = usbvision->curFrame; /* Optionally start at the beginning */ if (fullframe) { frame->curline = 0; frame->scanlength = 0; } /* Form every scan line */ for (; frame->curline < frame->frmheight; frame->curline++) { int i; f = frame->data + (usbvision->curwidth * 3 * frame->curline); for (i = 0; i < usbvision->curwidth; i++) { unsigned char cb = 0x80; unsigned char cg = 0; unsigned char cr = 0; if (pmode == 1) { if (frame->curline % 32 == 0) cb = 0, cg = cr = 0xFF; else if (i % 32 == 0) { if (frame->curline % 32 == 1) num_cell++; cb = 0, cg = cr = 0xFF; } else { cb = ((num_cell * 7) + num_pass) & 0xFF; cg = ((num_cell * 5) + num_pass * 2) & 0xFF; cr = ((num_cell * 3) + num_pass * 3) & 0xFF; } } else { /* Just the blue screen */ } *f++ = cb; *f++ = cg; *f++ = cr; scan_length += 3; } } frame->grabstate = FrameState_Done; frame->scanlength += scan_length; ++num_pass; } /* * usbvision_decompress_alloc() * * allocates intermediate buffer for decompression */ int usbvision_decompress_alloc(struct usb_usbvision *usbvision) { int IFB_size = MAX_FRAME_WIDTH * MAX_FRAME_HEIGHT * 3 / 2; usbvision->IntraFrameBuffer = vmalloc_32(IFB_size); if (usbvision->IntraFrameBuffer == NULL) { err("%s: unable to allocate %d for compr. frame buffer", __FUNCTION__, IFB_size); return -ENOMEM; } return 0; } /* * usbvision_decompress_free() * * frees intermediate buffer for decompression */ void usbvision_decompress_free(struct usb_usbvision *usbvision) { if (usbvision->IntraFrameBuffer != NULL) { vfree(usbvision->IntraFrameBuffer); usbvision->IntraFrameBuffer = NULL; } } /************************************************************ * Here comes the data parsing stuff that is run as interrupt ************************************************************/ /* * usbvision_find_header() * * Locate one of supported header markers in the scratch buffer. */ static enum ParseState usbvision_find_header(struct usb_usbvision *usbvision) { struct usbvision_frame *frame; int foundHeader = 0; frame = usbvision->curFrame; while (scratch_get_header(usbvision, &frame->isocHeader) == USBVISION_HEADER_LENGTH) { // found header in scratch PDEBUG(DBG_HEADER, "found header: 0x%02x%02x %d %d %d %d %#x 0x%02x %u %u", frame->isocHeader.magic_2, frame->isocHeader.magic_1, frame->isocHeader.headerLength, frame->isocHeader.frameNum, frame->isocHeader.framePhase, frame->isocHeader.frameLatency, frame->isocHeader.dataFormat, frame->isocHeader.formatParam, frame->isocHeader.frameWidth, frame->isocHeader.frameHeight); if (usbvision->requestIntra) { if (frame->isocHeader.formatParam & 0x80) { foundHeader = 1; usbvision->lastIsocFrameNum = -1; // do not check for lost frames this time usbvision_unrequest_intra(usbvision); break; } } else { foundHeader = 1; break; } } if (foundHeader) { frame->frmwidth = frame->isocHeader.frameWidth * usbvision->stretch_width; frame->frmheight = frame->isocHeader.frameHeight * usbvision->stretch_height; frame->v4l2_linesize = (frame->frmwidth * frame->v4l2_format.depth)>> 3; } else { // no header found PDEBUG(DBG_HEADER, "skipping scratch data, no header"); scratch_reset(usbvision); return ParseState_EndParse; } // found header if (frame->isocHeader.dataFormat==ISOC_MODE_COMPRESS) { //check isocHeader.frameNum for lost frames if (usbvision->lastIsocFrameNum >= 0) { if (((usbvision->lastIsocFrameNum + 1) % 32) != frame->isocHeader.frameNum) { // unexpected frame drop: need to request new intra frame PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isocHeader.frameNum); usbvision_request_intra(usbvision); return ParseState_NextFrame; } } usbvision->lastIsocFrameNum = frame->isocHeader.frameNum; } usbvision->header_count++; frame->scanstate = ScanState_Lines; frame->curline = 0; if (force_testpattern) { usbvision_testpattern(usbvision, 1, 1); return ParseState_NextFrame; } return ParseState_Continue; } static enum ParseState usbvision_parse_lines_422(struct usb_usbvision *usbvision, long *pcopylen) { volatile struct usbvision_frame *frame; unsigned char *f; int len; int i; unsigned char yuyv[4]={180, 128, 10, 128}; // YUV components unsigned char rv, gv, bv; // RGB components int clipmask_index, bytes_per_pixel; int stretch_bytes, clipmask_add; frame = usbvision->curFrame; f = frame->data + (frame->v4l2_linesize * frame->curline); /* Make sure there's enough data for the entire line */ len = (frame->isocHeader.frameWidth * 2)+5; if (scratch_len(usbvision) < len) { PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len); return ParseState_Out; } if ((frame->curline + 1) >= frame->frmheight) { return ParseState_NextFrame; } bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel; clipmask_index = frame->curline * MAX_FRAME_WIDTH; clipmask_add = usbvision->stretch_width; for (i = 0; i < frame->frmwidth; i+=(2 * usbvision->stretch_width)) { scratch_get(usbvision, &yuyv[0], 4); if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { *f++ = yuyv[0]; // Y *f++ = yuyv[3]; // U } else { YUV_TO_RGB_BY_THE_BOOK(yuyv[0], yuyv[1], yuyv[3], rv, gv, bv); switch (frame->v4l2_format.format) { case V4L2_PIX_FMT_RGB565: *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3)); *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv); break; case V4L2_PIX_FMT_RGB24: *f++ = bv; *f++ = gv; *f++ = rv; break; case V4L2_PIX_FMT_RGB32: *f++ = bv; *f++ = gv; *f++ = rv; f++; break; case V4L2_PIX_FMT_RGB555: *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2)); *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1)); break; } } clipmask_index += clipmask_add; f += stretch_bytes; if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { *f++ = yuyv[2]; // Y *f++ = yuyv[1]; // V } else { YUV_TO_RGB_BY_THE_BOOK(yuyv[2], yuyv[1], yuyv[3], rv, gv, bv); switch (frame->v4l2_format.format) { case V4L2_PIX_FMT_RGB565: *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3)); *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv); break; case V4L2_PIX_FMT_RGB24: *f++ = bv; *f++ = gv; *f++ = rv; break; case V4L2_PIX_FMT_RGB32: *f++ = bv; *f++ = gv; *f++ = rv; f++; break; case V4L2_PIX_FMT_RGB555: *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2)); *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1)); break; } } clipmask_index += clipmask_add; f += stretch_bytes; } frame->curline += usbvision->stretch_height; *pcopylen += frame->v4l2_linesize * usbvision->stretch_height; if (frame->curline >= frame->frmheight) { return ParseState_NextFrame; } else { return ParseState_Continue; } } /* The decompression routine */ static int usbvision_decompress(struct usb_usbvision *usbvision,unsigned char *Compressed, unsigned char *Decompressed, int *StartPos, int *BlockTypeStartPos, int Len) { int RestPixel, Idx, MaxPos, Pos, ExtraPos, BlockLen, BlockTypePos, BlockTypeLen; unsigned char BlockByte, BlockCode, BlockType, BlockTypeByte, Integrator; Integrator = 0; Pos = *StartPos; BlockTypePos = *BlockTypeStartPos; MaxPos = 396; //Pos + Len; ExtraPos = Pos; BlockLen = 0; BlockByte = 0; BlockCode = 0; BlockType = 0; BlockTypeByte = 0; BlockTypeLen = 0; RestPixel = Len; for (Idx = 0; Idx < Len; Idx++) { if (BlockLen == 0) { if (BlockTypeLen==0) { BlockTypeByte = Compressed[BlockTypePos]; BlockTypePos++; BlockTypeLen = 4; } BlockType = (BlockTypeByte & 0xC0) >> 6; //statistic: usbvision->ComprBlockTypes[BlockType]++; Pos = ExtraPos; if (BlockType == 0) { if(RestPixel >= 24) { Idx += 23; RestPixel -= 24; Integrator = Decompressed[Idx]; } else { Idx += RestPixel - 1; RestPixel = 0; } } else { BlockCode = Compressed[Pos]; Pos++; if (RestPixel >= 24) { BlockLen = 24; } else { BlockLen = RestPixel; } RestPixel -= BlockLen; ExtraPos = Pos + (BlockLen / 4); } BlockTypeByte <<= 2; BlockTypeLen -= 1; } if (BlockLen > 0) { if ((BlockLen%4) == 0) { BlockByte = Compressed[Pos]; Pos++; } if (BlockType == 1) { //inter Block Integrator = Decompressed[Idx]; } switch (BlockByte & 0xC0) { case 0x03<<6: Integrator += Compressed[ExtraPos]; ExtraPos++; break; case 0x02<<6: Integrator += BlockCode; break; case 0x00: Integrator -= BlockCode; break; } Decompressed[Idx] = Integrator; BlockByte <<= 2; BlockLen -= 1; } } *StartPos = ExtraPos; *BlockTypeStartPos = BlockTypePos; return Idx; } /* * usbvision_parse_compress() * * Parse compressed frame from the scratch buffer, put * decoded RGB value into the current frame buffer and add the written * number of bytes (RGB) to the *pcopylen. * */ static enum ParseState usbvision_parse_compress(struct usb_usbvision *usbvision, long *pcopylen) { #define USBVISION_STRIP_MAGIC 0x5A #define USBVISION_STRIP_LEN_MAX 400 #define USBVISION_STRIP_HEADER_LEN 3 struct usbvision_frame *frame; unsigned char *f,*u = NULL ,*v = NULL; unsigned char StripData[USBVISION_STRIP_LEN_MAX]; unsigned char StripHeader[USBVISION_STRIP_HEADER_LEN]; int Idx, IdxEnd, StripLen, StripPtr, StartBlockPos, BlockPos, BlockTypePos; int clipmask_index, bytes_per_pixel, rc; int imageSize; unsigned char rv, gv, bv; static unsigned char *Y, *U, *V; frame = usbvision->curFrame; imageSize = frame->frmwidth * frame->frmheight; if ( (frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) || (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) ) { // this is a planar format //... v4l2_linesize not used here. f = frame->data + (frame->width * frame->curline); } else f = frame->data + (frame->v4l2_linesize * frame->curline); if (frame->v4l2_format.format == V4L2_PIX_FMT_YUYV){ //initialise u and v pointers // get base of u and b planes add halfoffset u = frame->data + imageSize + (frame->frmwidth >>1) * frame->curline ; v = u + (imageSize >>1 ); } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420){ v = frame->data + imageSize + ((frame->curline* (frame->width))>>2) ; u = v + (imageSize >>2) ; } if (frame->curline == 0) { usbvision_adjust_compression(usbvision); } if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN) { return ParseState_Out; } //get strip header without changing the scratch_read_ptr scratch_set_extra_ptr(usbvision, &StripPtr, 0); scratch_get_extra(usbvision, &StripHeader[0], &StripPtr, USBVISION_STRIP_HEADER_LEN); if (StripHeader[0] != USBVISION_STRIP_MAGIC) { // wrong strip magic usbvision->stripMagicErrors++; return ParseState_NextFrame; } if (frame->curline != (int)StripHeader[2]) { //line number missmatch error usbvision->stripLineNumberErrors++; } StripLen = 2 * (unsigned int)StripHeader[1]; if (StripLen > USBVISION_STRIP_LEN_MAX) { // strip overrun // I think this never happens usbvision_request_intra(usbvision); } if (scratch_len(usbvision) < StripLen) { //there is not enough data for the strip return ParseState_Out; } if (usbvision->IntraFrameBuffer) { Y = usbvision->IntraFrameBuffer + frame->frmwidth * frame->curline; U = usbvision->IntraFrameBuffer + imageSize + (frame->frmwidth / 2) * (frame->curline / 2); V = usbvision->IntraFrameBuffer + imageSize / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2); } else { return ParseState_NextFrame; } bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; clipmask_index = frame->curline * MAX_FRAME_WIDTH; scratch_get(usbvision, StripData, StripLen); IdxEnd = frame->frmwidth; BlockTypePos = USBVISION_STRIP_HEADER_LEN; StartBlockPos = BlockTypePos + (IdxEnd - 1) / 96 + (IdxEnd / 2 - 1) / 96 + 2; BlockPos = StartBlockPos; usbvision->BlockPos = BlockPos; if ((rc = usbvision_decompress(usbvision, StripData, Y, &BlockPos, &BlockTypePos, IdxEnd)) != IdxEnd) { //return ParseState_Continue; } if (StripLen > usbvision->maxStripLen) { usbvision->maxStripLen = StripLen; } if (frame->curline%2) { if ((rc = usbvision_decompress(usbvision, StripData, V, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) { //return ParseState_Continue; } } else { if ((rc = usbvision_decompress(usbvision, StripData, U, &BlockPos, &BlockTypePos, IdxEnd/2)) != IdxEnd/2) { //return ParseState_Continue; } } if (BlockPos > usbvision->comprBlockPos) { usbvision->comprBlockPos = BlockPos; } if (BlockPos > StripLen) { usbvision->stripLenErrors++; } for (Idx = 0; Idx < IdxEnd; Idx++) { if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { *f++ = Y[Idx]; *f++ = Idx & 0x01 ? U[Idx/2] : V[Idx/2]; } else if(frame->v4l2_format.format == V4L2_PIX_FMT_YUV422P) { *f++ = Y[Idx]; if ( Idx & 0x01) *u++ = U[Idx>>1] ; else *v++ = V[Idx>>1]; } else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) { *f++ = Y [Idx]; if ( !(( Idx & 0x01 ) | ( frame->curline & 0x01 )) ){ /* only need do this for 1 in 4 pixels */ /* intraframe buffer is YUV420 format */ *u++ = U[Idx >>1]; *v++ = V[Idx >>1]; } } else { YUV_TO_RGB_BY_THE_BOOK(Y[Idx], U[Idx/2], V[Idx/2], rv, gv, bv); switch (frame->v4l2_format.format) { case V4L2_PIX_FMT_GREY: *f++ = Y[Idx]; break; case V4L2_PIX_FMT_RGB555: *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 2)); *f++ = (0x03 & (gv >> 6)) | (0x7C & (rv >> 1)); break; case V4L2_PIX_FMT_RGB565: *f++ = (0x1F & (bv >> 3)) | (0xE0 & (gv << 3)); *f++ = (0x07 & (gv >> 5)) | (0xF8 & rv); break; case V4L2_PIX_FMT_RGB24: *f++ = bv; *f++ = gv; *f++ = rv; break; case V4L2_PIX_FMT_RGB32: *f++ = bv; *f++ = gv; *f++ = rv; f++; break; } } clipmask_index++; } /* Deal with non-integer no. of bytes for YUV420P */ if (frame->v4l2_format.format != V4L2_PIX_FMT_YVU420 ) *pcopylen += frame->v4l2_linesize; else *pcopylen += frame->curline & 0x01 ? frame->v4l2_linesize : frame->v4l2_linesize << 1; frame->curline += 1; if (frame->curline >= frame->frmheight) { return ParseState_NextFrame; } else { return ParseState_Continue; } } /* * usbvision_parse_lines_420() * * Parse two lines from the scratch buffer, put * decoded RGB value into the current frame buffer and add the written * number of bytes (RGB) to the *pcopylen. * */ static enum ParseState usbvision_parse_lines_420(struct usb_usbvision *usbvision, long *pcopylen) { struct usbvision_frame *frame; unsigned char *f_even = NULL, *f_odd = NULL; unsigned int pixel_per_line, block; int pixel, block_split; int y_ptr, u_ptr, v_ptr, y_odd_offset; const int y_block_size = 128; const int uv_block_size = 64; const int sub_block_size = 32; const int y_step[] = { 0, 0, 0, 2 }, y_step_size = 4; const int uv_step[]= { 0, 0, 0, 4 }, uv_step_size = 4; unsigned char y[2], u, v; /* YUV components */ int y_, u_, v_, vb, uvg, ur; int r_, g_, b_; /* RGB components */ unsigned char g; int clipmask_even_index, clipmask_odd_index, bytes_per_pixel; int clipmask_add, stretch_bytes; frame = usbvision->curFrame; f_even = frame->data + (frame->v4l2_linesize * frame->curline); f_odd = f_even + frame->v4l2_linesize * usbvision->stretch_height; /* Make sure there's enough data for the entire line */ /* In this mode usbvision transfer 3 bytes for every 2 pixels */ /* I need two lines to decode the color */ bytes_per_pixel = frame->v4l2_format.bytes_per_pixel; stretch_bytes = (usbvision->stretch_width - 1) * bytes_per_pixel; clipmask_even_index = frame->curline * MAX_FRAME_WIDTH; clipmask_odd_index = clipmask_even_index + MAX_FRAME_WIDTH; clipmask_add = usbvision->stretch_width; pixel_per_line = frame->isocHeader.frameWidth; if (scratch_len(usbvision) < (int)pixel_per_line * 3) { //printk(KERN_DEBUG "out of data, need %d\n", len); return ParseState_Out; } if ((frame->curline + 1) >= frame->frmheight) { return ParseState_NextFrame; } block_split = (pixel_per_line%y_block_size) ? 1 : 0; //are some blocks splitted into different lines? y_odd_offset = (pixel_per_line / y_block_size) * (y_block_size + uv_block_size) + block_split * uv_block_size; scratch_set_extra_ptr(usbvision, &y_ptr, y_odd_offset); scratch_set_extra_ptr(usbvision, &u_ptr, y_block_size); scratch_set_extra_ptr(usbvision, &v_ptr, y_odd_offset + (4 - block_split) * sub_block_size); for (block = 0; block < (pixel_per_line / sub_block_size); block++) { for (pixel = 0; pixel < sub_block_size; pixel +=2) { scratch_get(usbvision, &y[0], 2); scratch_get_extra(usbvision, &u, &u_ptr, 1); scratch_get_extra(usbvision, &v, &v_ptr, 1); //I don't use the YUV_TO_RGB macro for better performance v_ = v - 128; u_ = u - 128; vb = 132252 * v_; uvg= -53281 * u_ - 25625 * v_; ur = 104595 * u_; if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { *f_even++ = y[0]; *f_even++ = v; } else { y_ = 76284 * (y[0] - 16); b_ = (y_ + vb) >> 16; g_ = (y_ + uvg)>> 16; r_ = (y_ + ur) >> 16; switch (frame->v4l2_format.format) { case V4L2_PIX_FMT_RGB565: g = LIMIT_RGB(g_); *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3)); *f_even++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_)); break; case V4L2_PIX_FMT_RGB24: *f_even++ = LIMIT_RGB(b_); *f_even++ = LIMIT_RGB(g_); *f_even++ = LIMIT_RGB(r_); break; case V4L2_PIX_FMT_RGB32: *f_even++ = LIMIT_RGB(b_); *f_even++ = LIMIT_RGB(g_); *f_even++ = LIMIT_RGB(r_); f_even++; break; case V4L2_PIX_FMT_RGB555: g = LIMIT_RGB(g_); *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2)); *f_even++ = (0x03 & ( g >> 6)) | (0x7C & (LIMIT_RGB(r_) >> 1)); break; } } clipmask_even_index += clipmask_add; f_even += stretch_bytes; if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { *f_even++ = y[1]; *f_even++ = u; } else { y_ = 76284 * (y[1] - 16); b_ = (y_ + vb) >> 16; g_ = (y_ + uvg)>> 16; r_ = (y_ + ur) >> 16; switch (frame->v4l2_format.format) { case V4L2_PIX_FMT_RGB565: g = LIMIT_RGB(g_); *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3)); *f_even++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_)); break; case V4L2_PIX_FMT_RGB24: *f_even++ = LIMIT_RGB(b_); *f_even++ = LIMIT_RGB(g_); *f_even++ = LIMIT_RGB(r_); break; case V4L2_PIX_FMT_RGB32: *f_even++ = LIMIT_RGB(b_); *f_even++ = LIMIT_RGB(g_); *f_even++ = LIMIT_RGB(r_); f_even++; break; case V4L2_PIX_FMT_RGB555: g = LIMIT_RGB(g_); *f_even++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2)); *f_even++ = (0x03 & ( g >> 6)) | (0x7C & (LIMIT_RGB(r_) >> 1)); break; } } clipmask_even_index += clipmask_add; f_even += stretch_bytes; scratch_get_extra(usbvision, &y[0], &y_ptr, 2); if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { *f_odd++ = y[0]; *f_odd++ = v; } else { y_ = 76284 * (y[0] - 16); b_ = (y_ + vb) >> 16; g_ = (y_ + uvg)>> 16; r_ = (y_ + ur) >> 16; switch (frame->v4l2_format.format) { case V4L2_PIX_FMT_RGB565: g = LIMIT_RGB(g_); *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3)); *f_odd++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_)); break; case V4L2_PIX_FMT_RGB24: *f_odd++ = LIMIT_RGB(b_); *f_odd++ = LIMIT_RGB(g_); *f_odd++ = LIMIT_RGB(r_); break; case V4L2_PIX_FMT_RGB32: *f_odd++ = LIMIT_RGB(b_); *f_odd++ = LIMIT_RGB(g_); *f_odd++ = LIMIT_RGB(r_); f_odd++; break; case V4L2_PIX_FMT_RGB555: g = LIMIT_RGB(g_); *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2)); *f_odd++ = (0x03 & ( g >> 6)) | (0x7C & (LIMIT_RGB(r_) >> 1)); break; } } clipmask_odd_index += clipmask_add; f_odd += stretch_bytes; if(frame->v4l2_format.format == V4L2_PIX_FMT_YUYV) { *f_odd++ = y[1]; *f_odd++ = u; } else { y_ = 76284 * (y[1] - 16); b_ = (y_ + vb) >> 16; g_ = (y_ + uvg)>> 16; r_ = (y_ + ur) >> 16; switch (frame->v4l2_format.format) { case V4L2_PIX_FMT_RGB565: g = LIMIT_RGB(g_); *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 3)); *f_odd++ = (0x07 & ( g >> 5)) | (0xF8 & LIMIT_RGB(r_)); break; case V4L2_PIX_FMT_RGB24: *f_odd++ = LIMIT_RGB(b_); *f_odd++ = LIMIT_RGB(g_); *f_odd++ = LIMIT_RGB(r_); break; case V4L2_PIX_FMT_RGB32: *f_odd++ = LIMIT_RGB(b_); *f_odd++ = LIMIT_RGB(g_); *f_odd++ = LIMIT_RGB(r_); f_odd++; break; case V4L2_PIX_FMT_RGB555: g = LIMIT_RGB(g_); *f_odd++ = (0x1F & (LIMIT_RGB(b_) >> 3)) | (0xE0 & (g << 2)); *f_odd++ = (0x03 & ( g >> 6)) | (0x7C & (LIMIT_RGB(r_) >> 1)); break; } } clipmask_odd_index += clipmask_add; f_odd += stretch_bytes; } scratch_rm_old(usbvision,y_step[block % y_step_size] * sub_block_size); scratch_inc_extra_ptr(&y_ptr, y_step[(block + 2 * block_split) % y_step_size] * sub_block_size); scratch_inc_extra_ptr(&u_ptr, uv_step[block % uv_step_size] * sub_block_size); scratch_inc_extra_ptr(&v_ptr, uv_step[(block + 2 * block_split) % uv_step_size] * sub_block_size); } scratch_rm_old(usbvision, pixel_per_line * 3 / 2 + block_split * sub_block_size); frame->curline += 2 * usbvision->stretch_height; *pcopylen += frame->v4l2_linesize * 2 * usbvision->stretch_height; if (frame->curline >= frame->frmheight) return ParseState_NextFrame; else return ParseState_Continue; } /* * usbvision_parse_data() * * Generic routine to parse the scratch buffer. It employs either * usbvision_find_header() or usbvision_parse_lines() to do most * of work. * */ static void usbvision_parse_data(struct usb_usbvision *usbvision) { struct usbvision_frame *frame; enum ParseState newstate; long copylen = 0; unsigned long lock_flags; frame = usbvision->curFrame; PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision)); while (1) { newstate = ParseState_Out; if (scratch_len(usbvision)) { if (frame->scanstate == ScanState_Scanning) { newstate = usbvision_find_header(usbvision); } else if (frame->scanstate == ScanState_Lines) { if (usbvision->isocMode == ISOC_MODE_YUV420) { newstate = usbvision_parse_lines_420(usbvision, ©len); } else if (usbvision->isocMode == ISOC_MODE_YUV422) { newstate = usbvision_parse_lines_422(usbvision, ©len); } else if (usbvision->isocMode == ISOC_MODE_COMPRESS) { newstate = usbvision_parse_compress(usbvision, ©len); } } } if (newstate == ParseState_Continue) { continue; } else if ((newstate == ParseState_NextFrame) || (newstate == ParseState_Out)) { break; } else { return; /* ParseState_EndParse */ } } if (newstate == ParseState_NextFrame) { frame->grabstate = FrameState_Done; do_gettimeofday(&(frame->timestamp)); frame->sequence = usbvision->frame_num; spin_lock_irqsave(&usbvision->queue_lock, lock_flags); list_move_tail(&(frame->frame), &usbvision->outqueue); usbvision->curFrame = NULL; spin_unlock_irqrestore(&usbvision->queue_lock, lock_flags); usbvision->frame_num++; /* This will cause the process to request another frame. */ if (waitqueue_active(&usbvision->wait_frame)) { PDEBUG(DBG_PARSE, "Wake up !"); wake_up_interruptible(&usbvision->wait_frame); } } else frame->grabstate = FrameState_Grabbing; /* Update the frame's uncompressed length. */ frame->scanlength += copylen; } /* * Make all of the blocks of data contiguous */ static int usbvision_compress_isochronous(struct usb_usbvision *usbvision, struct urb *urb) { unsigned char *packet_data; int i, totlen = 0; for (i = 0; i < urb->number_of_packets; i++) { int packet_len = urb->iso_frame_desc[i].actual_length; int packet_stat = urb->iso_frame_desc[i].status; packet_data = urb->transfer_buffer + urb->iso_frame_desc[i].offset; /* Detect and ignore errored packets */ if (packet_stat) { // packet_stat != 0 ????????????? PDEBUG(DBG_ISOC, "data error: [%d] len=%d, status=%X", i, packet_len, packet_stat); usbvision->isocErrCount++; continue; } /* Detect and ignore empty packets */ if (packet_len < 0) { PDEBUG(DBG_ISOC, "error packet [%d]", i); usbvision->isocSkipCount++; continue; } else if (packet_len == 0) { /* Frame end ????? */ PDEBUG(DBG_ISOC, "null packet [%d]", i); usbvision->isocstate=IsocState_NoFrame; usbvision->isocSkipCount++; continue; } else if (packet_len > usbvision->isocPacketSize) { PDEBUG(DBG_ISOC, "packet[%d] > isocPacketSize", i); usbvision->isocSkipCount++; continue; } PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len); if (usbvision->isocstate==IsocState_NoFrame) { //new frame begins usbvision->isocstate=IsocState_InFrame; scratch_mark_header(usbvision); usbvision_measure_bandwidth(usbvision); PDEBUG(DBG_ISOC, "packet with header"); } /* * If usbvision continues to feed us with data but there is no * consumption (if, for example, V4L client fell asleep) we * may overflow the buffer. We have to move old data over to * free room for new data. This is bad for old data. If we * just drop new data then it's bad for new data... choose * your favorite evil here. */ if (scratch_free(usbvision) < packet_len) { usbvision->scratch_ovf_count++; PDEBUG(DBG_ISOC, "scratch buf overflow! scr_len: %d, n: %d", scratch_len(usbvision), packet_len); scratch_rm_old(usbvision, packet_len - scratch_free(usbvision)); } /* Now we know that there is enough room in scratch buffer */ scratch_put(usbvision, packet_data, packet_len); totlen += packet_len; usbvision->isocDataCount += packet_len; usbvision->isocPacketCount++; } #if ENABLE_HEXDUMP if (totlen > 0) { static int foo = 0; if (foo < 1) { printk(KERN_DEBUG "+%d.\n", usbvision->scratchlen); usbvision_hexdump(data0, (totlen > 64) ? 64 : totlen); ++foo; } } #endif return totlen; } static void usbvision_isocIrq(struct urb *urb) { int errCode = 0; int len; struct usb_usbvision *usbvision = urb->context; int i; unsigned long startTime = jiffies; struct usbvision_frame **f; /* We don't want to do anything if we are about to be removed! */ if (!USBVISION_IS_OPERATIONAL(usbvision)) return; /* any urb with wrong status is ignored without acknowledgement */ if (urb->status == -ENOENT) { return; } f = &usbvision->curFrame; /* Manage streaming interruption */ if (usbvision->streaming == Stream_Interrupt) { usbvision->streaming = Stream_Idle; if ((*f)) { (*f)->grabstate = FrameState_Ready; (*f)->scanstate = ScanState_Scanning; } PDEBUG(DBG_IRQ, "stream interrupted"); wake_up_interruptible(&usbvision->wait_stream); } /* Copy the data received into our scratch buffer */ len = usbvision_compress_isochronous(usbvision, urb); usbvision->isocUrbCount++; usbvision->urb_length = len; if (usbvision->streaming == Stream_On) { /* If we collected enough data let's parse! */ if ((scratch_len(usbvision) > USBVISION_HEADER_LENGTH) && (!list_empty(&(usbvision->inqueue))) ) { if (!(*f)) { (*f) = list_entry(usbvision->inqueue.next, struct usbvision_frame, frame); } usbvision_parse_data(usbvision); } else { /*If we don't have a frame we're current working on, complain */ PDEBUG(DBG_IRQ, "received data, but no one needs it"); scratch_reset(usbvision); } } else { PDEBUG(DBG_IRQ, "received data, but no one needs it"); scratch_reset(usbvision); } usbvision->timeInIrq += jiffies - startTime; for (i = 0; i < USBVISION_URB_FRAMES; i++) { urb->iso_frame_desc[i].status = 0; urb->iso_frame_desc[i].actual_length = 0; } urb->status = 0; urb->dev = usbvision->dev; errCode = usb_submit_urb (urb, GFP_ATOMIC); if(errCode) { err("%s: usb_submit_urb failed: error %d", __FUNCTION__, errCode); } return; } /*************************************/ /* Low level usbvision access functions */ /*************************************/ /* * usbvision_read_reg() * * return < 0 -> Error * >= 0 -> Data */ int usbvision_read_reg(struct usb_usbvision *usbvision, unsigned char reg) { int errCode = 0; unsigned char buffer[1]; if (!USBVISION_IS_OPERATIONAL(usbvision)) return -1; errCode = usb_control_msg(usbvision->dev, usb_rcvctrlpipe(usbvision->dev, 1), USBVISION_OP_CODE, USB_DIR_IN | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0, (__u16) reg, buffer, 1, HZ); if (errCode < 0) { err("%s: failed: error %d", __FUNCTION__, errCode); return errCode; } return buffer[0]; } /* * usbvision_write_reg() * * return 1 -> Reg written * 0 -> usbvision is not yet ready * -1 -> Something went wrong */ int usbvision_write_reg(struct usb_usbvision *usbvision, unsigned char reg, unsigned char value) { int errCode = 0; if (!USBVISION_IS_OPERATIONAL(usbvision)) return 0; errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), USBVISION_OP_CODE, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0, (__u16) reg, &value, 1, HZ); if (errCode < 0) { err("%s: failed: error %d", __FUNCTION__, errCode); } return errCode; } static void usbvision_ctrlUrb_complete(struct urb *urb) { struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context; PDEBUG(DBG_IRQ, ""); usbvision->ctrlUrbBusy = 0; if (waitqueue_active(&usbvision->ctrlUrb_wq)) { wake_up_interruptible(&usbvision->ctrlUrb_wq); } } static int usbvision_write_reg_irq(struct usb_usbvision *usbvision,int address, unsigned char *data, int len) { int errCode = 0; PDEBUG(DBG_IRQ, ""); if (len > 8) { return -EFAULT; } // down(&usbvision->ctrlUrbLock); if (usbvision->ctrlUrbBusy) { // up(&usbvision->ctrlUrbLock); return -EBUSY; } usbvision->ctrlUrbBusy = 1; // up(&usbvision->ctrlUrbLock); usbvision->ctrlUrbSetup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT; usbvision->ctrlUrbSetup.bRequest = USBVISION_OP_CODE; usbvision->ctrlUrbSetup.wValue = 0; usbvision->ctrlUrbSetup.wIndex = cpu_to_le16(address); usbvision->ctrlUrbSetup.wLength = cpu_to_le16(len); usb_fill_control_urb (usbvision->ctrlUrb, usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), (unsigned char *)&usbvision->ctrlUrbSetup, (void *)usbvision->ctrlUrbBuffer, len, usbvision_ctrlUrb_complete, (void *)usbvision); memcpy(usbvision->ctrlUrbBuffer, data, len); errCode = usb_submit_urb(usbvision->ctrlUrb, GFP_ATOMIC); if (errCode < 0) { // error in usb_submit_urb() usbvision->ctrlUrbBusy = 0; } PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, errCode); return errCode; } static int usbvision_init_compression(struct usb_usbvision *usbvision) { int errCode = 0; usbvision->lastIsocFrameNum = -1; usbvision->isocDataCount = 0; usbvision->isocPacketCount = 0; usbvision->isocSkipCount = 0; usbvision->comprLevel = 50; usbvision->lastComprLevel = -1; usbvision->isocUrbCount = 0; usbvision->requestIntra = 1; usbvision->isocMeasureBandwidthCount = 0; return errCode; } /* this function measures the used bandwidth since last call * return: 0 : no error * sets usedBandwidth to 1-100 : 1-100% of full bandwidth resp. to isocPacketSize */ static int usbvision_measure_bandwidth (struct usb_usbvision *usbvision) { int errCode = 0; if (usbvision->isocMeasureBandwidthCount < 2) { // this gives an average bandwidth of 3 frames usbvision->isocMeasureBandwidthCount++; return errCode; } if ((usbvision->isocPacketSize > 0) && (usbvision->isocPacketCount > 0)) { usbvision->usedBandwidth = usbvision->isocDataCount / (usbvision->isocPacketCount + usbvision->isocSkipCount) * 100 / usbvision->isocPacketSize; } usbvision->isocMeasureBandwidthCount = 0; usbvision->isocDataCount = 0; usbvision->isocPacketCount = 0; usbvision->isocSkipCount = 0; return errCode; } static int usbvision_adjust_compression (struct usb_usbvision *usbvision) { int errCode = 0; unsigned char buffer[6]; PDEBUG(DBG_IRQ, ""); if ((adjustCompression) && (usbvision->usedBandwidth > 0)) { usbvision->comprLevel += (usbvision->usedBandwidth - 90) / 2; RESTRICT_TO_RANGE(usbvision->comprLevel, 0, 100); if (usbvision->comprLevel != usbvision->lastComprLevel) { int distorsion; if (usbvision->bridgeType == BRIDGE_NT1004 || usbvision->bridgeType == BRIDGE_NT1005) { buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM Threshold 1 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM Threshold 2 distorsion = 7 + 248 * usbvision->comprLevel / 100; buffer[2] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (inter) buffer[3] = (unsigned char)(distorsion & 0xFF); // Average distorsion Threshold (intra) distorsion = 1 + 42 * usbvision->comprLevel / 100; buffer[4] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (inter) buffer[5] = (unsigned char)(distorsion & 0xFF); // Maximum distorsion Threshold (intra) } else { //BRIDGE_NT1003 buffer[0] = (unsigned char)(4 + 16 * usbvision->comprLevel / 100); // PCM threshold 1 buffer[1] = (unsigned char)(4 + 8 * usbvision->comprLevel / 100); // PCM threshold 2 distorsion = 2 + 253 * usbvision->comprLevel / 100; buffer[2] = (unsigned char)(distorsion & 0xFF); // distorsion threshold bit0-7 buffer[3] = 0; //(unsigned char)((distorsion >> 8) & 0x0F); // distorsion threshold bit 8-11 distorsion = 0 + 43 * usbvision->comprLevel / 100; buffer[4] = (unsigned char)(distorsion & 0xFF); // maximum distorsion bit0-7 buffer[5] = 0; //(unsigned char)((distorsion >> 8) & 0x01); // maximum distorsion bit 8 } errCode = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6); if (errCode == 0){ PDEBUG(DBG_IRQ, "new compr params %#02x %#02x %#02x %#02x %#02x %#02x", buffer[0], buffer[1], buffer[2], buffer[3], buffer[4], buffer[5]); usbvision->lastComprLevel = usbvision->comprLevel; } } } return errCode; } static int usbvision_request_intra (struct usb_usbvision *usbvision) { int errCode = 0; unsigned char buffer[1]; PDEBUG(DBG_IRQ, ""); usbvision->requestIntra = 1; buffer[0] = 1; usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1); return errCode; } static int usbvision_unrequest_intra (struct usb_usbvision *usbvision) { int errCode = 0; unsigned char buffer[1]; PDEBUG(DBG_IRQ, ""); usbvision->requestIntra = 0; buffer[0] = 0; usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1); return errCode; } /******************************* * usbvision utility functions *******************************/ int usbvision_power_off(struct usb_usbvision *usbvision) { int errCode = 0; PDEBUG(DBG_FUNC, ""); errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN); if (errCode == 1) { usbvision->power = 0; } PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode!=1)?"ERROR":"power is off", errCode); return errCode; } /* * usbvision_set_video_format() * */ static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format) { static const char proc[] = "usbvision_set_video_format"; int rc; unsigned char value[2]; if (!USBVISION_IS_OPERATIONAL(usbvision)) return 0; PDEBUG(DBG_FUNC, "isocMode %#02x", format); if ((format != ISOC_MODE_YUV422) && (format != ISOC_MODE_YUV420) && (format != ISOC_MODE_COMPRESS)) { printk(KERN_ERR "usbvision: unknown video format %02x, using default YUV420", format); format = ISOC_MODE_YUV420; } value[0] = 0x0A; //TODO: See the effect of the filter value[1] = format; // Sets the VO_MODE register which follows FILT_CONT rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), USBVISION_OP_CODE, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0, (__u16) USBVISION_FILT_CONT, value, 2, HZ); if (rc < 0) { printk(KERN_ERR "%s: ERROR=%d. USBVISION stopped - " "reconnect or reload driver.\n", proc, rc); } usbvision->isocMode = format; return rc; } /* * usbvision_set_output() * */ int usbvision_set_output(struct usb_usbvision *usbvision, int width, int height) { int errCode = 0; int UsbWidth, UsbHeight; unsigned int frameRate=0, frameDrop=0; unsigned char value[4]; if (!USBVISION_IS_OPERATIONAL(usbvision)) { return 0; } if (width > MAX_USB_WIDTH) { UsbWidth = width / 2; usbvision->stretch_width = 2; } else { UsbWidth = width; usbvision->stretch_width = 1; } if (height > MAX_USB_HEIGHT) { UsbHeight = height / 2; usbvision->stretch_height = 2; } else { UsbHeight = height; usbvision->stretch_height = 1; } RESTRICT_TO_RANGE(UsbWidth, MIN_FRAME_WIDTH, MAX_USB_WIDTH); UsbWidth &= ~(MIN_FRAME_WIDTH-1); RESTRICT_TO_RANGE(UsbHeight, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT); UsbHeight &= ~(1); PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d", UsbWidth, UsbHeight, width, height, usbvision->stretch_width, usbvision->stretch_height); /* I'll not rewrite the same values */ if ((UsbWidth != usbvision->curwidth) || (UsbHeight != usbvision->curheight)) { value[0] = UsbWidth & 0xff; //LSB value[1] = (UsbWidth >> 8) & 0x03; //MSB value[2] = UsbHeight & 0xff; //LSB value[3] = (UsbHeight >> 8) & 0x03; //MSB errCode = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), USBVISION_OP_CODE, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0, (__u16) USBVISION_LXSIZE_O, value, 4, HZ); if (errCode < 0) { err("%s failed: error %d", __FUNCTION__, errCode); return errCode; } usbvision->curwidth = usbvision->stretch_width * UsbWidth; usbvision->curheight = usbvision->stretch_height * UsbHeight; } if (usbvision->isocMode == ISOC_MODE_YUV422) { frameRate = (usbvision->isocPacketSize * 1000) / (UsbWidth * UsbHeight * 2); } else if (usbvision->isocMode == ISOC_MODE_YUV420) { frameRate = (usbvision->isocPacketSize * 1000) / ((UsbWidth * UsbHeight * 12) / 8); } else { frameRate = FRAMERATE_MAX; } if (usbvision->tvnorm->id & V4L2_STD_625_50) { frameDrop = frameRate * 32 / 25 - 1; } else if (usbvision->tvnorm->id & V4L2_STD_525_60) { frameDrop = frameRate * 32 / 30 - 1; } RESTRICT_TO_RANGE(frameDrop, FRAMERATE_MIN, FRAMERATE_MAX); PDEBUG(DBG_FUNC, "frameRate %d fps, frameDrop %d", frameRate, frameDrop); frameDrop = FRAMERATE_MAX; // We can allow the maximum here, because dropping is controlled /* frameDrop = 7; => framePhase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ... => frameSkip = 4; => frameRate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25; frameDrop = 9; => framePhase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ... => frameSkip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ... => frameRate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125; */ errCode = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frameDrop); return errCode; } /* * usbvision_frames_alloc * allocate the required frames */ int usbvision_frames_alloc(struct usb_usbvision *usbvision, int number_of_frames) { int i; /*needs to be page aligned cause the buffers can be mapped individually! */ usbvision->max_frame_size = PAGE_ALIGN(usbvision->curwidth * usbvision->curheight * usbvision->palette.bytes_per_pixel); /* Try to do my best to allocate the frames the user want in the remaining memory */ usbvision->num_frames = number_of_frames; while (usbvision->num_frames > 0) { usbvision->fbuf_size = usbvision->num_frames * usbvision->max_frame_size; if((usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size))) { break; } usbvision->num_frames--; } spin_lock_init(&usbvision->queue_lock); init_waitqueue_head(&usbvision->wait_frame); init_waitqueue_head(&usbvision->wait_stream); /* Allocate all buffers */ for (i = 0; i < usbvision->num_frames; i++) { usbvision->frame[i].index = i; usbvision->frame[i].grabstate = FrameState_Unused; usbvision->frame[i].data = usbvision->fbuf + i * usbvision->max_frame_size; /* * Set default sizes for read operation. */ usbvision->stretch_width = 1; usbvision->stretch_height = 1; usbvision->frame[i].width = usbvision->curwidth; usbvision->frame[i].height = usbvision->curheight; usbvision->frame[i].bytes_read = 0; } PDEBUG(DBG_FUNC, "allocated %d frames (%d bytes per frame)",usbvision->num_frames,usbvision->max_frame_size); return usbvision->num_frames; } /* * usbvision_frames_free * frees memory allocated for the frames */ void usbvision_frames_free(struct usb_usbvision *usbvision) { /* Have to free all that memory */ PDEBUG(DBG_FUNC, "free %d frames",usbvision->num_frames); if (usbvision->fbuf != NULL) { usbvision_rvfree(usbvision->fbuf, usbvision->fbuf_size); usbvision->fbuf = NULL; usbvision->num_frames = 0; } } /* * usbvision_empty_framequeues() * prepare queues for incoming and outgoing frames */ void usbvision_empty_framequeues(struct usb_usbvision *usbvision) { u32 i; INIT_LIST_HEAD(&(usbvision->inqueue)); INIT_LIST_HEAD(&(usbvision->outqueue)); for (i = 0; i < USBVISION_NUMFRAMES; i++) { usbvision->frame[i].grabstate = FrameState_Unused; usbvision->frame[i].bytes_read = 0; } } /* * usbvision_stream_interrupt() * stops streaming */ int usbvision_stream_interrupt(struct usb_usbvision *usbvision) { int ret = 0; /* stop reading from the device */ usbvision->streaming = Stream_Interrupt; ret = wait_event_timeout(usbvision->wait_stream, (usbvision->streaming == Stream_Idle), msecs_to_jiffies(USBVISION_NUMSBUF*USBVISION_URB_FRAMES)); return ret; } /* * usbvision_set_compress_params() * */ static int usbvision_set_compress_params(struct usb_usbvision *usbvision) { static const char proc[] = "usbvision_set_compresion_params: "; int rc; unsigned char value[6]; value[0] = 0x0F; // Intra-Compression cycle value[1] = 0x01; // Reg.45 one line per strip value[2] = 0x00; // Reg.46 Force intra mode on all new frames value[3] = 0x00; // Reg.47 FORCE_UP <- 0 normal operation (not force) value[4] = 0xA2; // Reg.48 BUF_THR I'm not sure if this does something in not compressed mode. value[5] = 0x00; // Reg.49 DVI_YUV This has nothing to do with compression //catched values for NT1004 // value[0] = 0xFF; // Never apply intra mode automatically // value[1] = 0xF1; // Use full frame height for virtual strip width; One line per strip // value[2] = 0x01; // Force intra mode on all new frames // value[3] = 0x00; // Strip size 400 Bytes; do not force up // value[4] = 0xA2; // if (!USBVISION_IS_OPERATIONAL(usbvision)) return 0; rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), USBVISION_OP_CODE, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0, (__u16) USBVISION_INTRA_CYC, value, 5, HZ); if (rc < 0) { printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " "reconnect or reload driver.\n", proc, rc); return rc; } if (usbvision->bridgeType == BRIDGE_NT1004) { value[0] = 20; // PCM Threshold 1 value[1] = 12; // PCM Threshold 2 value[2] = 255; // Distorsion Threshold inter value[3] = 255; // Distorsion Threshold intra value[4] = 43; // Max Distorsion inter value[5] = 43; // Max Distorsion intra } else { value[0] = 20; // PCM Threshold 1 value[1] = 12; // PCM Threshold 2 value[2] = 255; // Distorsion Threshold d7-d0 value[3] = 0; // Distorsion Threshold d11-d8 value[4] = 43; // Max Distorsion d7-d0 value[5] = 0; // Max Distorsion d8 } if (!USBVISION_IS_OPERATIONAL(usbvision)) return 0; rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), USBVISION_OP_CODE, USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0, (__u16) USBVISION_PCM_THR1, value, 6, HZ); if (rc < 0) { printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " "reconnect or reload driver.\n", proc, rc); return rc; } return rc; } /* * usbvision_set_input() * * Set the input (saa711x, ...) size x y and other misc input params * I've no idea if this parameters are right * */ int usbvision_set_input(struct usb_usbvision *usbvision) { static const char proc[] = "usbvision_set_input: "; int rc; unsigned char value[8]; unsigned char dvi_yuv_value; if (!USBVISION_IS_OPERATIONAL(usbvision)) return 0; /* Set input format expected from decoder*/ if (usbvision_device_data[usbvision->DevModel].Vin_Reg1_override) { value[0] = usbvision_device_data[usbvision->DevModel].Vin_Reg1; } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) { /* SAA7113 uses 8 bit output */ value[0] = USBVISION_8_422_SYNC; } else { /* I'm sure only about d2-d0 [010] 16 bit 4:2:2 usin sync pulses * as that is how saa7111 is configured */ value[0] = USBVISION_16_422_SYNC; /* | USBVISION_VSNC_POL | USBVISION_VCLK_POL);*/ } rc = usbvision_write_reg(usbvision, USBVISION_VIN_REG1, value[0]); if (rc < 0) { printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " "reconnect or reload driver.\n", proc, rc); return rc; } if (usbvision->tvnorm->id & V4L2_STD_PAL) { value[0] = 0xC0; value[1] = 0x02; //0x02C0 -> 704 Input video line length value[2] = 0x20; value[3] = 0x01; //0x0120 -> 288 Input video n. of lines value[4] = 0x60; value[5] = 0x00; //0x0060 -> 96 Input video h offset value[6] = 0x16; value[7] = 0x00; //0x0016 -> 22 Input video v offset } else if (usbvision->tvnorm->id & V4L2_STD_SECAM) { value[0] = 0xC0; value[1] = 0x02; //0x02C0 -> 704 Input video line length value[2] = 0x20; value[3] = 0x01; //0x0120 -> 288 Input video n. of lines value[4] = 0x01; value[5] = 0x00; //0x0001 -> 01 Input video h offset value[6] = 0x01; value[7] = 0x00; //0x0001 -> 01 Input video v offset } else { /* V4L2_STD_NTSC */ value[0] = 0xD0; value[1] = 0x02; //0x02D0 -> 720 Input video line length value[2] = 0xF0; value[3] = 0x00; //0x00F0 -> 240 Input video number of lines value[4] = 0x50; value[5] = 0x00; //0x0050 -> 80 Input video h offset value[6] = 0x10; value[7] = 0x00; //0x0010 -> 16 Input video v offset } if (usbvision_device_data[usbvision->DevModel].X_Offset >= 0) { value[4]=usbvision_device_data[usbvision->DevModel].X_Offset & 0xff; value[5]=(usbvision_device_data[usbvision->DevModel].X_Offset & 0x0300) >> 8; } if (usbvision_device_data[usbvision->DevModel].Y_Offset >= 0) { value[6]=usbvision_device_data[usbvision->DevModel].Y_Offset & 0xff; value[7]=(usbvision_device_data[usbvision->DevModel].Y_Offset & 0x0300) >> 8; } rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), USBVISION_OP_CODE, /* USBVISION specific code */ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0, (__u16) USBVISION_LXSIZE_I, value, 8, HZ); if (rc < 0) { printk(KERN_ERR "%sERROR=%d. USBVISION stopped - " "reconnect or reload driver.\n", proc, rc); return rc; } dvi_yuv_value = 0x00; /* U comes after V, Ya comes after U/V, Yb comes after Yb */ if(usbvision_device_data[usbvision->DevModel].Dvi_yuv_override){ dvi_yuv_value = usbvision_device_data[usbvision->DevModel].Dvi_yuv; } else if(usbvision_device_data[usbvision->DevModel].Codec == CODEC_SAA7113) { /* This changes as the fine sync control changes. Further investigation necessary */ dvi_yuv_value = 0x06; } return (usbvision_write_reg(usbvision, USBVISION_DVI_YUV, dvi_yuv_value)); } /* * usbvision_set_dram_settings() * * Set the buffer address needed by the usbvision dram to operate * This values has been taken with usbsnoop. * */ static int usbvision_set_dram_settings(struct usb_usbvision *usbvision) { int rc; unsigned char value[8]; if (usbvision->isocMode == ISOC_MODE_COMPRESS) { value[0] = 0x42; value[1] = 0x71; value[2] = 0xff; value[3] = 0x00; value[4] = 0x98; value[5] = 0xe0; value[6] = 0x71; value[7] = 0xff; // UR: 0x0E200-0x3FFFF = 204288 Words (1 Word = 2 Byte) // FDL: 0x00000-0x0E099 = 57498 Words // VDW: 0x0E3FF-0x3FFFF } else { value[0] = 0x42; value[1] = 0x00; value[2] = 0xff; value[3] = 0x00; value[4] = 0x00; value[5] = 0x00; value[6] = 0x00; value[7] = 0xff; } /* These are the values of the address of the video buffer, * they have to be loaded into the USBVISION_DRM_PRM1-8 * * Start address of video output buffer for read: drm_prm1-2 -> 0x00000 * End address of video output buffer for read: drm_prm1-3 -> 0x1ffff * Start address of video frame delay buffer: drm_prm1-4 -> 0x20000 * Only used in compressed mode * End address of video frame delay buffer: drm_prm1-5-6 -> 0x3ffff * Only used in compressed mode * Start address of video output buffer for write: drm_prm1-7 -> 0x00000 * End address of video output buffer for write: drm_prm1-8 -> 0x1ffff */ if (!USBVISION_IS_OPERATIONAL(usbvision)) return 0; rc = usb_control_msg(usbvision->dev, usb_sndctrlpipe(usbvision->dev, 1), USBVISION_OP_CODE, /* USBVISION specific code */ USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT, 0, (__u16) USBVISION_DRM_PRM1, value, 8, HZ); if (rc < 0) { err("%sERROR=%d", __FUNCTION__, rc); return rc; } /* Restart the video buffer logic */ if ((rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR | USBVISION_RES_FDL | USBVISION_RES_VDW)) < 0) return rc; rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, 0x00); return rc; } /* * () * * Power on the device, enables suspend-resume logic * & reset the isoc End-Point * */ int usbvision_power_on(struct usb_usbvision *usbvision) { int errCode = 0; PDEBUG(DBG_FUNC, ""); usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN); usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN | USBVISION_RES2); usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN | USBVISION_PWR_VID); errCode = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2); if (errCode == 1) { usbvision->power = 1; } PDEBUG(DBG_FUNC, "%s: errCode %d", (errCode<0)?"ERROR":"power is on", errCode); return errCode; } /* * usbvision timer stuff */ // to call usbvision_power_off from task queue static void call_usbvision_power_off(struct work_struct *work) { struct usb_usbvision *usbvision = container_of(work, struct usb_usbvision, powerOffWork); PDEBUG(DBG_FUNC, ""); down_interruptible(&usbvision->lock); if(usbvision->user == 0) { usbvision_i2c_unregister(usbvision); usbvision_power_off(usbvision); usbvision->initialized = 0; } up(&usbvision->lock); } static void usbvision_powerOffTimer(unsigned long data) { struct usb_usbvision *usbvision = (void *) data; PDEBUG(DBG_FUNC, ""); del_timer(&usbvision->powerOffTimer); INIT_WORK(&usbvision->powerOffWork, call_usbvision_power_off); (void) schedule_work(&usbvision->powerOffWork); } void usbvision_init_powerOffTimer(struct usb_usbvision *usbvision) { init_timer(&usbvision->powerOffTimer); usbvision->powerOffTimer.data = (long) usbvision; usbvision->powerOffTimer.function = usbvision_powerOffTimer; } void usbvision_set_powerOffTimer(struct usb_usbvision *usbvision) { mod_timer(&usbvision->powerOffTimer, jiffies + USBVISION_POWEROFF_TIME); } void usbvision_reset_powerOffTimer(struct usb_usbvision *usbvision) { if (timer_pending(&usbvision->powerOffTimer)) { del_timer(&usbvision->powerOffTimer); } } /* * usbvision_begin_streaming() * Sure you have to put bit 7 to 0, if not incoming frames are droped, but no * idea about the rest */ int usbvision_begin_streaming(struct usb_usbvision *usbvision) { int errCode = 0; if (usbvision->isocMode == ISOC_MODE_COMPRESS) { usbvision_init_compression(usbvision); } errCode = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_NOHVALID | usbvision->Vin_Reg2_Preset); return errCode; } /* * usbvision_restart_isoc() * Not sure yet if touching here PWR_REG make loose the config */ int usbvision_restart_isoc(struct usb_usbvision *usbvision) { int ret; if ( (ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN | USBVISION_PWR_VID)) < 0) return ret; if ( (ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2)) < 0) return ret; if ( (ret = usbvision_write_reg(usbvision, USBVISION_VIN_REG2, USBVISION_KEEP_BLANK | USBVISION_NOHVALID | usbvision->Vin_Reg2_Preset)) < 0) return ret; /* TODO: schedule timeout */ while ((usbvision_read_reg(usbvision, USBVISION_STATUS_REG) & 0x01) != 1); return 0; } int usbvision_audio_off(struct usb_usbvision *usbvision) { if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_AUDIO_MUTE) < 0) { printk(KERN_ERR "usbvision_audio_off: can't wirte reg\n"); return -1; } usbvision->AudioMute = 0; usbvision->AudioChannel = USBVISION_AUDIO_MUTE; return 0; } int usbvision_set_audio(struct usb_usbvision *usbvision, int AudioChannel) { if (!usbvision->AudioMute) { if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, AudioChannel) < 0) { printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n"); return -1; } } usbvision->AudioChannel = AudioChannel; return 0; } int usbvision_setup(struct usb_usbvision *usbvision,int format) { usbvision_set_video_format(usbvision, format); usbvision_set_dram_settings(usbvision); usbvision_set_compress_params(usbvision); usbvision_set_input(usbvision); usbvision_set_output(usbvision, MAX_USB_WIDTH, MAX_USB_HEIGHT); usbvision_restart_isoc(usbvision); /* cosas del PCM */ return USBVISION_IS_OPERATIONAL(usbvision); } int usbvision_set_alternate(struct usb_usbvision *dev) { int errCode, prev_alt = dev->ifaceAlt; int i; dev->ifaceAlt=0; for(i=0;i< dev->num_alt; i++) if(dev->alt_max_pkt_size[i]>dev->alt_max_pkt_size[dev->ifaceAlt]) dev->ifaceAlt=i; if (dev->ifaceAlt != prev_alt) { dev->isocPacketSize = dev->alt_max_pkt_size[dev->ifaceAlt]; PDEBUG(DBG_FUNC,"setting alternate %d with wMaxPacketSize=%u", dev->ifaceAlt,dev->isocPacketSize); errCode = usb_set_interface(dev->dev, dev->iface, dev->ifaceAlt); if (errCode < 0) { err ("cannot change alternate number to %d (error=%i)", dev->ifaceAlt, errCode); return errCode; } } PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isocPacketSize); return 0; } /* * usbvision_init_isoc() * */ int usbvision_init_isoc(struct usb_usbvision *usbvision) { struct usb_device *dev = usbvision->dev; int bufIdx, errCode, regValue; int sb_size; if (!USBVISION_IS_OPERATIONAL(usbvision)) return -EFAULT; usbvision->curFrame = NULL; scratch_reset(usbvision); /* Alternate interface 1 is is the biggest frame size */ errCode = usbvision_set_alternate(usbvision); if (errCode < 0) { usbvision->last_error = errCode; return -EBUSY; } sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize; regValue = (16 - usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F; usbvision->usb_bandwidth = regValue >> 1; PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth); /* We double buffer the Iso lists */ for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) { int j, k; struct urb *urb; urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL); if (urb == NULL) { err("%s: usb_alloc_urb() failed", __FUNCTION__); return -ENOMEM; } usbvision->sbuf[bufIdx].urb = urb; usbvision->sbuf[bufIdx].data = usb_buffer_alloc(usbvision->dev, sb_size, GFP_KERNEL, &urb->transfer_dma); urb->dev = dev; urb->context = usbvision; urb->pipe = usb_rcvisocpipe(dev, usbvision->video_endp); urb->transfer_flags = URB_ISO_ASAP; urb->interval = 1; urb->transfer_buffer = usbvision->sbuf[bufIdx].data; urb->complete = usbvision_isocIrq; urb->number_of_packets = USBVISION_URB_FRAMES; urb->transfer_buffer_length = usbvision->isocPacketSize * USBVISION_URB_FRAMES; for (j = k = 0; j < USBVISION_URB_FRAMES; j++, k += usbvision->isocPacketSize) { urb->iso_frame_desc[j].offset = k; urb->iso_frame_desc[j].length = usbvision->isocPacketSize; } } /* Submit all URBs */ for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) { errCode = usb_submit_urb(usbvision->sbuf[bufIdx].urb, GFP_KERNEL); if (errCode) { err("%s: usb_submit_urb(%d) failed: error %d", __FUNCTION__, bufIdx, errCode); } } usbvision->streaming = Stream_Idle; PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x", __FUNCTION__, usbvision->video_endp); return 0; } /* * usbvision_stop_isoc() * * This procedure stops streaming and deallocates URBs. Then it * activates zero-bandwidth alt. setting of the video interface. * */ void usbvision_stop_isoc(struct usb_usbvision *usbvision) { int bufIdx, errCode, regValue; int sb_size = USBVISION_URB_FRAMES * usbvision->isocPacketSize; if ((usbvision->streaming == Stream_Off) || (usbvision->dev == NULL)) return; /* Unschedule all of the iso td's */ for (bufIdx = 0; bufIdx < USBVISION_NUMSBUF; bufIdx++) { usb_kill_urb(usbvision->sbuf[bufIdx].urb); if (usbvision->sbuf[bufIdx].data){ usb_buffer_free(usbvision->dev, sb_size, usbvision->sbuf[bufIdx].data, usbvision->sbuf[bufIdx].urb->transfer_dma); } usb_free_urb(usbvision->sbuf[bufIdx].urb); usbvision->sbuf[bufIdx].urb = NULL; } PDEBUG(DBG_ISOC, "%s: streaming=Stream_Off\n", __FUNCTION__); usbvision->streaming = Stream_Off; if (!usbvision->remove_pending) { /* Set packet size to 0 */ usbvision->ifaceAlt=0; errCode = usb_set_interface(usbvision->dev, usbvision->iface, usbvision->ifaceAlt); if (errCode < 0) { err("%s: usb_set_interface() failed: error %d", __FUNCTION__, errCode); usbvision->last_error = errCode; } regValue = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F; usbvision->isocPacketSize = (regValue == 0) ? 0 : (regValue * 64) - 1; PDEBUG(DBG_ISOC, "ISO Packet Length:%d", usbvision->isocPacketSize); usbvision->usb_bandwidth = regValue >> 1; PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec", usbvision->usb_bandwidth); } } int usbvision_muxsel(struct usb_usbvision *usbvision, int channel) { int mode[4]; int audio[]= {1, 0, 0, 0}; struct v4l2_routing route; //channel 0 is TV with audiochannel 1 (tuner mono) //channel 1 is Composite with audio channel 0 (line in) //channel 2 is S-Video with audio channel 0 (line in) //channel 3 is additional video inputs to the device with audio channel 0 (line in) RESTRICT_TO_RANGE(channel, 0, usbvision->video_inputs); usbvision->ctl_input = channel; route.input = SAA7115_COMPOSITE1; route.output = 0; call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route); call_i2c_clients(usbvision, VIDIOC_S_INPUT, &usbvision->ctl_input); // set the new channel // Regular USB TV Tuners -> channel: 0 = Television, 1 = Composite, 2 = S-Video // Four video input devices -> channel: 0 = Chan White, 1 = Chan Green, 2 = Chan Yellow, 3 = Chan Red switch (usbvision_device_data[usbvision->DevModel].Codec) { case CODEC_SAA7113: if (SwitchSVideoInput) { // To handle problems with S-Video Input for some devices. Use SwitchSVideoInput parameter when loading the module. mode[2] = 1; } else { mode[2] = 7; } if (usbvision_device_data[usbvision->DevModel].VideoChannels == 4) { mode[0] = 0; mode[1] = 2; mode[3] = 3; // Special for four input devices } else { mode[0] = 0; mode[1] = 2; //modes for regular saa7113 devices } break; case CODEC_SAA7111: mode[0] = 0; mode[1] = 1; mode[2] = 7; //modes for saa7111 break; default: mode[0] = 0; mode[1] = 1; mode[2] = 7; //default modes } route.input = mode[channel]; call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route); usbvision->channel = channel; usbvision_set_audio(usbvision, audio[channel]); return 0; } /* * Overrides for Emacs so that we follow Linus's tabbing style. * --------------------------------------------------------------------------- * Local variables: * c-basic-offset: 8 * End: */