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linux/drivers/media/video/usbvision/usbvision-core.c

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/*
* usbvision-core.c - driver for NT100x USB video capture devices
*
*
* Copyright (c) 1999-2005 Joerg Heckenbach <joerg@heckenbach-aw.de>
* Dwaine Garden <dwainegarden@rogers.com>
*
* 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 <linux/kernel.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/utsname.h>
#include <linux/highmem.h>
#include <linux/videodev.h>
#include <linux/vmalloc.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <linux/videodev2.h>
#include <linux/video_decoder.h>
#include <linux/i2c.h>
#include <media/saa7115.h>
#include <media/v4l2-common.h>
#include <media/tuner.h>
#include <media/audiochip.h>
#include <linux/workqueue.h>
#ifdef CONFIG_KMOD
#include <linux/kmod.h>
#endif
#include "usbvision.h"
static unsigned int core_debug;
module_param(core_debug,int,0644);
MODULE_PARM_DESC(core_debug,"enable debug messages [core]");
static unsigned int force_testpattern;
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)");
/* To help people with Black and White output with using s-video input.
* Some cables and input device are wired differently. */
static int SwitchSVideoInput;
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)");
static unsigned int adjust_X_Offset = -1;
module_param(adjust_X_Offset, int, 0644);
MODULE_PARM_DESC(adjust_X_Offset, "adjust X offset display [core]");
static unsigned int adjust_Y_Offset = -1;
module_param(adjust_Y_Offset, int, 0644);
MODULE_PARM_DESC(adjust_Y_Offset, "adjust Y offset display [core]");
#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, __func__, __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",
__func__, 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;
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",
__func__, 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 & rv) |
(0xE0 & (gv << 5));
*f++ = (0x07 & (gv >> 3)) |
(0xF8 & bv);
break;
case V4L2_PIX_FMT_RGB24:
*f++ = rv;
*f++ = gv;
*f++ = bv;
break;
case V4L2_PIX_FMT_RGB32:
*f++ = rv;
*f++ = gv;
*f++ = bv;
f++;
break;
case V4L2_PIX_FMT_RGB555:
*f++ = (0x1F & rv) |
(0xE0 & (gv << 5));
*f++ = (0x03 & (gv >> 3)) |
(0x7C & (bv << 2));
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 & rv) |
(0xE0 & (gv << 5));
*f++ = (0x07 & (gv >> 3)) |
(0xF8 & bv);
break;
case V4L2_PIX_FMT_RGB24:
*f++ = rv;
*f++ = gv;
*f++ = bv;
break;
case V4L2_PIX_FMT_RGB32:
*f++ = rv;
*f++ = gv;
*f++ = bv;
f++;
break;
case V4L2_PIX_FMT_RGB555:
*f++ = (0x1F & rv) |
(0xE0 & (gv << 5));
*f++ = (0x03 & (gv >> 3)) |
(0x7C & (bv << 2));
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 & rv) |
(0xE0 & (gv << 5));
*f++ = (0x03 & (gv >> 3)) |
(0x7C & (bv << 2));
break;
case V4L2_PIX_FMT_RGB565:
*f++ = (0x1F & rv) |
(0xE0 & (gv << 5));
*f++ = (0x07 & (gv >> 3)) |
(0xF8 & bv);
break;
case V4L2_PIX_FMT_RGB24:
*f++ = rv;
*f++ = gv;
*f++ = bv;
break;
case V4L2_PIX_FMT_RGB32:
*f++ = rv;
*f++ = gv;
*f++ = bv;
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(r_)) |
(0xE0 & (g << 5));
*f_even++ =
(0x07 & (g >> 3)) |
(0xF8 & LIMIT_RGB(b_));
break;
case V4L2_PIX_FMT_RGB24:
*f_even++ = LIMIT_RGB(r_);
*f_even++ = LIMIT_RGB(g_);
*f_even++ = LIMIT_RGB(b_);
break;
case V4L2_PIX_FMT_RGB32:
*f_even++ = LIMIT_RGB(r_);
*f_even++ = LIMIT_RGB(g_);
*f_even++ = LIMIT_RGB(b_);
f_even++;
break;
case V4L2_PIX_FMT_RGB555:
g = LIMIT_RGB(g_);
*f_even++ = (0x1F & LIMIT_RGB(r_)) |
(0xE0 & (g << 5));
*f_even++ = (0x03 & (g >> 3)) |
(0x7C & (LIMIT_RGB(b_) << 2));
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(r_)) |
(0xE0 & (g << 5));
*f_even++ =
(0x07 & (g >> 3)) |
(0xF8 & LIMIT_RGB(b_));
break;
case V4L2_PIX_FMT_RGB24:
*f_even++ = LIMIT_RGB(r_);
*f_even++ = LIMIT_RGB(g_);
*f_even++ = LIMIT_RGB(b_);
break;
case V4L2_PIX_FMT_RGB32:
*f_even++ = LIMIT_RGB(r_);
*f_even++ = LIMIT_RGB(g_);
*f_even++ = LIMIT_RGB(b_);
f_even++;
break;
case V4L2_PIX_FMT_RGB555:
g = LIMIT_RGB(g_);
*f_even++ = (0x1F & LIMIT_RGB(r_)) |
(0xE0 & (g << 5));
*f_even++ = (0x03 & (g >> 3)) |
(0x7C & (LIMIT_RGB(b_) << 2));
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(r_)) |
(0xE0 & (g << 5));
*f_odd++ =
(0x07 & (g >> 3)) |
(0xF8 & LIMIT_RGB(b_));
break;
case V4L2_PIX_FMT_RGB24:
*f_odd++ = LIMIT_RGB(r_);
*f_odd++ = LIMIT_RGB(g_);
*f_odd++ = LIMIT_RGB(b_);
break;
case V4L2_PIX_FMT_RGB32:
*f_odd++ = LIMIT_RGB(r_);
*f_odd++ = LIMIT_RGB(g_);
*f_odd++ = LIMIT_RGB(b_);
f_odd++;
break;
case V4L2_PIX_FMT_RGB555:
g = LIMIT_RGB(g_);
*f_odd++ = (0x1F & LIMIT_RGB(r_)) |
(0xE0 & (g << 5));
*f_odd++ = (0x03 & (g >> 3)) |
(0x7C & (LIMIT_RGB(b_) << 2));
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(r_)) |
(0xE0 & (g << 5));
*f_odd++ =
(0x07 & (g >> 3)) |
(0xF8 & LIMIT_RGB(b_));
break;
case V4L2_PIX_FMT_RGB24:
*f_odd++ = LIMIT_RGB(r_);
*f_odd++ = LIMIT_RGB(g_);
*f_odd++ = LIMIT_RGB(b_);
break;
case V4L2_PIX_FMT_RGB32:
*f_odd++ = LIMIT_RGB(r_);
*f_odd++ = LIMIT_RGB(g_);
*f_odd++ = LIMIT_RGB(b_);
f_odd++;
break;
case V4L2_PIX_FMT_RGB555:
g = LIMIT_RGB(g_);
*f_odd++ = (0x1F & LIMIT_RGB(r_)) |
(0xE0 & (g << 5));
*f_odd++ = (0x03 & (g >> 3)) |
(0x7C & (LIMIT_RGB(b_) << 2));
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, &copylen);
}
else if (usbvision->isocMode == ISOC_MODE_YUV422) {
newstate = usbvision_parse_lines_422(usbvision, &copylen);
}
else if (usbvision->isocMode == ISOC_MODE_COMPRESS) {
newstate = usbvision_parse_compress(usbvision, &copylen);
}
}
}
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;
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",
__func__, 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", __func__, 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", __func__, 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;
}
if (usbvision->ctrlUrbBusy) {
return -EBUSY;
}
usbvision->ctrlUrbBusy = 1;
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", __func__, 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->tvnormId & V4L2_STD_625_50) {
frameDrop = frameRate * 32 / 25 - 1;
}
else if (usbvision->tvnormId & 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->tvnormId & 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->tvnormId & 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 (adjust_X_Offset != -1) {
value[4] = adjust_X_Offset & 0xff;
value[5] = (adjust_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;
}
if (adjust_Y_Offset != -1) {
value[6] = adjust_Y_Offset & 0xff;
value[7] = (adjust_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", __func__, 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, "");
if(mutex_lock_interruptible(&usbvision->lock)) {
return;
}
if(usbvision->user == 0) {
usbvision_i2c_unregister(usbvision);
usbvision_power_off(usbvision);
usbvision->initialized = 0;
}
mutex_unlock(&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", __func__);
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",
__func__, bufIdx, errCode);
}
}
usbvision->streaming = Stream_Idle;
PDEBUG(DBG_ISOC, "%s: streaming=1 usbvision->video_endp=$%02x",
__func__,
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", __func__);
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",
__func__, 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)
{
/* inputs #0 and #3 are constant for every SAA711x. */
/* inputs #1 and #2 are variable for SAA7111 and SAA7113 */
int mode[4]= {SAA7115_COMPOSITE0, 0, 0, SAA7115_COMPOSITE3};
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;
// 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:
mode[1] = SAA7115_COMPOSITE2;
if (SwitchSVideoInput) {
/* To handle problems with S-Video Input for
* some devices. Use SwitchSVideoInput
* parameter when loading the module.*/
mode[2] = SAA7115_COMPOSITE1;
}
else {
mode[2] = SAA7115_SVIDEO1;
}
break;
case CODEC_SAA7111:
default:
/* modes for saa7111 */
mode[1] = SAA7115_COMPOSITE1;
mode[2] = SAA7115_SVIDEO1;
break;
}
route.input = mode[channel];
route.output = 0;
call_i2c_clients(usbvision, VIDIOC_INT_S_VIDEO_ROUTING,&route);
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:
*/
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