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ubuntu-linux-kernel/drivers/media/usb/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.
*/
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/timer.h>
#include <linux/gfp.h>
#include <linux/mm.h>
#include <linux/highmem.h>
#include <linux/vmalloc.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/videodev2.h>
#include <linux/i2c.h>
#include <media/i2c/saa7115.h>
#include <media/v4l2-common.h>
#include <media/tuner.h>
#include <linux/workqueue.h>
#include "usbvision.h"
static unsigned int core_debug;
module_param(core_debug, int, 0644);
MODULE_PARM_DESC(core_debug, "enable debug messages [core]");
static int adjust_compression = 1; /* Set the compression to be adaptive */
module_param(adjust_compression, int, 0444);
MODULE_PARM_DESC(adjust_compression, " 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 switch_svideo_input;
module_param(switch_svideo_input, int, 0444);
MODULE_PARM_DESC(switch_svideo_input, " 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)) \
printk(KERN_INFO KBUILD_MODNAME ":[%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)
/* 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(KERN_CONT "%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 err_code = 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->header_length == USBVISION_HEADER_LENGTH)) {
err_code = USBVISION_HEADER_LENGTH;
header->frame_width = header->frame_width_lo + (header->frame_width_hi << 8);
header->frame_height = header->frame_height_lo + (header->frame_height_hi << 8);
break;
}
}
return err_code;
}
/* 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 = isoc_state_no_frame;
}
int usbvision_scratch_alloc(struct usb_usbvision *usbvision)
{
usbvision->scratch = vmalloc_32(scratch_buf_size);
scratch_reset(usbvision);
if (usbvision->scratch == NULL) {
dev_err(&usbvision->dev->dev,
"%s: unable to allocate %d bytes for scratch\n",
__func__, scratch_buf_size);
return -ENOMEM;
}
return 0;
}
void usbvision_scratch_free(struct usb_usbvision *usbvision)
{
vfree(usbvision->scratch);
usbvision->scratch = NULL;
}
/*
* 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->intra_frame_buffer = vmalloc_32(IFB_size);
if (usbvision->intra_frame_buffer == NULL) {
dev_err(&usbvision->dev->dev,
"%s: unable to allocate %d for compr. frame buffer\n",
__func__, IFB_size);
return -ENOMEM;
}
return 0;
}
/*
* usbvision_decompress_free()
*
* frees intermediate buffer for decompression
*/
void usbvision_decompress_free(struct usb_usbvision *usbvision)
{
vfree(usbvision->intra_frame_buffer);
usbvision->intra_frame_buffer = 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 parse_state usbvision_find_header(struct usb_usbvision *usbvision)
{
struct usbvision_frame *frame;
int found_header = 0;
frame = usbvision->cur_frame;
while (scratch_get_header(usbvision, &frame->isoc_header) == 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->isoc_header.magic_2,
frame->isoc_header.magic_1,
frame->isoc_header.header_length,
frame->isoc_header.frame_num,
frame->isoc_header.frame_phase,
frame->isoc_header.frame_latency,
frame->isoc_header.data_format,
frame->isoc_header.format_param,
frame->isoc_header.frame_width,
frame->isoc_header.frame_height);
if (usbvision->request_intra) {
if (frame->isoc_header.format_param & 0x80) {
found_header = 1;
usbvision->last_isoc_frame_num = -1; /* do not check for lost frames this time */
usbvision_unrequest_intra(usbvision);
break;
}
} else {
found_header = 1;
break;
}
}
if (found_header) {
frame->frmwidth = frame->isoc_header.frame_width * usbvision->stretch_width;
frame->frmheight = frame->isoc_header.frame_height * 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 parse_state_end_parse;
}
/* found header */
if (frame->isoc_header.data_format == ISOC_MODE_COMPRESS) {
/* check isoc_header.frame_num for lost frames */
if (usbvision->last_isoc_frame_num >= 0) {
if (((usbvision->last_isoc_frame_num + 1) % 32) != frame->isoc_header.frame_num) {
/* unexpected frame drop: need to request new intra frame */
PDEBUG(DBG_HEADER, "Lost frame before %d on USB", frame->isoc_header.frame_num);
usbvision_request_intra(usbvision);
return parse_state_next_frame;
}
}
usbvision->last_isoc_frame_num = frame->isoc_header.frame_num;
}
usbvision->header_count++;
frame->scanstate = scan_state_lines;
frame->curline = 0;
return parse_state_continue;
}
static enum parse_state 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->cur_frame;
f = frame->data + (frame->v4l2_linesize * frame->curline);
/* Make sure there's enough data for the entire line */
len = (frame->isoc_header.frame_width * 2) + 5;
if (scratch_len(usbvision) < len) {
PDEBUG(DBG_PARSE, "out of data in line %d, need %u.\n", frame->curline, len);
return parse_state_out;
}
if ((frame->curline + 1) >= frame->frmheight)
return parse_state_next_frame;
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 parse_state_next_frame;
return parse_state_continue;
}
/* The decompression routine */
static int usbvision_decompress(struct usb_usbvision *usbvision, unsigned char *compressed,
unsigned char *decompressed, int *start_pos,
int *block_typestart_pos, int len)
{
int rest_pixel, idx, pos, extra_pos, block_len, block_type_pos, block_type_len;
unsigned char block_byte, block_code, block_type, block_type_byte, integrator;
integrator = 0;
pos = *start_pos;
block_type_pos = *block_typestart_pos;
extra_pos = pos;
block_len = 0;
block_byte = 0;
block_code = 0;
block_type = 0;
block_type_byte = 0;
block_type_len = 0;
rest_pixel = len;
for (idx = 0; idx < len; idx++) {
if (block_len == 0) {
if (block_type_len == 0) {
block_type_byte = compressed[block_type_pos];
block_type_pos++;
block_type_len = 4;
}
block_type = (block_type_byte & 0xC0) >> 6;
/* statistic: */
usbvision->compr_block_types[block_type]++;
pos = extra_pos;
if (block_type == 0) {
if (rest_pixel >= 24) {
idx += 23;
rest_pixel -= 24;
integrator = decompressed[idx];
} else {
idx += rest_pixel - 1;
rest_pixel = 0;
}
} else {
block_code = compressed[pos];
pos++;
if (rest_pixel >= 24)
block_len = 24;
else
block_len = rest_pixel;
rest_pixel -= block_len;
extra_pos = pos + (block_len / 4);
}
block_type_byte <<= 2;
block_type_len -= 1;
}
if (block_len > 0) {
if ((block_len % 4) == 0) {
block_byte = compressed[pos];
pos++;
}
if (block_type == 1) /* inter Block */
integrator = decompressed[idx];
switch (block_byte & 0xC0) {
case 0x03 << 6:
integrator += compressed[extra_pos];
extra_pos++;
break;
case 0x02 << 6:
integrator += block_code;
break;
case 0x00:
integrator -= block_code;
break;
}
decompressed[idx] = integrator;
block_byte <<= 2;
block_len -= 1;
}
}
*start_pos = extra_pos;
*block_typestart_pos = block_type_pos;
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 parse_state 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 strip_data[USBVISION_STRIP_LEN_MAX];
unsigned char strip_header[USBVISION_STRIP_HEADER_LEN];
int idx, idx_end, strip_len, strip_ptr, startblock_pos, block_pos, block_type_pos;
int clipmask_index;
int image_size;
unsigned char rv, gv, bv;
static unsigned char *Y, *U, *V;
frame = usbvision->cur_frame;
image_size = 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
+ image_size
+ (frame->frmwidth >> 1) * frame->curline;
v = u + (image_size >> 1);
} else if (frame->v4l2_format.format == V4L2_PIX_FMT_YVU420) {
v = frame->data + image_size + ((frame->curline * (frame->width)) >> 2);
u = v + (image_size >> 2);
}
if (frame->curline == 0)
usbvision_adjust_compression(usbvision);
if (scratch_len(usbvision) < USBVISION_STRIP_HEADER_LEN)
return parse_state_out;
/* get strip header without changing the scratch_read_ptr */
scratch_set_extra_ptr(usbvision, &strip_ptr, 0);
scratch_get_extra(usbvision, &strip_header[0], &strip_ptr,
USBVISION_STRIP_HEADER_LEN);
if (strip_header[0] != USBVISION_STRIP_MAGIC) {
/* wrong strip magic */
usbvision->strip_magic_errors++;
return parse_state_next_frame;
}
if (frame->curline != (int)strip_header[2]) {
/* line number mismatch error */
usbvision->strip_line_number_errors++;
}
strip_len = 2 * (unsigned int)strip_header[1];
if (strip_len > USBVISION_STRIP_LEN_MAX) {
/* strip overrun */
/* I think this never happens */
usbvision_request_intra(usbvision);
}
if (scratch_len(usbvision) < strip_len) {
/* there is not enough data for the strip */
return parse_state_out;
}
if (usbvision->intra_frame_buffer) {
Y = usbvision->intra_frame_buffer + frame->frmwidth * frame->curline;
U = usbvision->intra_frame_buffer + image_size + (frame->frmwidth / 2) * (frame->curline / 2);
V = usbvision->intra_frame_buffer + image_size / 4 * 5 + (frame->frmwidth / 2) * (frame->curline / 2);
} else {
return parse_state_next_frame;
}
clipmask_index = frame->curline * MAX_FRAME_WIDTH;
scratch_get(usbvision, strip_data, strip_len);
idx_end = frame->frmwidth;
block_type_pos = USBVISION_STRIP_HEADER_LEN;
startblock_pos = block_type_pos + (idx_end - 1) / 96 + (idx_end / 2 - 1) / 96 + 2;
block_pos = startblock_pos;
usbvision->block_pos = block_pos;
usbvision_decompress(usbvision, strip_data, Y, &block_pos, &block_type_pos, idx_end);
if (strip_len > usbvision->max_strip_len)
usbvision->max_strip_len = strip_len;
if (frame->curline % 2)
usbvision_decompress(usbvision, strip_data, V, &block_pos, &block_type_pos, idx_end / 2);
else
usbvision_decompress(usbvision, strip_data, U, &block_pos, &block_type_pos, idx_end / 2);
if (block_pos > usbvision->comprblock_pos)
usbvision->comprblock_pos = block_pos;
if (block_pos > strip_len)
usbvision->strip_len_errors++;
for (idx = 0; idx < idx_end; 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 parse_state_next_frame;
return parse_state_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 parse_state 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->cur_frame;
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->isoc_header.frame_width;
if (scratch_len(usbvision) < (int)pixel_per_line * 3) {
/* printk(KERN_DEBUG "out of data, need %d\n", len); */
return parse_state_out;
}
if ((frame->curline + 1) >= frame->frmheight)
return parse_state_next_frame;
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 parse_state_next_frame;
return parse_state_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 parse_state newstate;
long copylen = 0;
unsigned long lock_flags;
frame = usbvision->cur_frame;
PDEBUG(DBG_PARSE, "parsing len=%d\n", scratch_len(usbvision));
while (1) {
newstate = parse_state_out;
if (scratch_len(usbvision)) {
if (frame->scanstate == scan_state_scanning) {
newstate = usbvision_find_header(usbvision);
} else if (frame->scanstate == scan_state_lines) {
if (usbvision->isoc_mode == ISOC_MODE_YUV420)
newstate = usbvision_parse_lines_420(usbvision, &copylen);
else if (usbvision->isoc_mode == ISOC_MODE_YUV422)
newstate = usbvision_parse_lines_422(usbvision, &copylen);
else if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
newstate = usbvision_parse_compress(usbvision, &copylen);
}
}
if (newstate == parse_state_continue)
continue;
if ((newstate == parse_state_next_frame) || (newstate == parse_state_out))
break;
return; /* parse_state_end_parse */
}
if (newstate == parse_state_next_frame) {
frame->grabstate = frame_state_done;
v4l2_get_timestamp(&(frame->timestamp));
frame->sequence = usbvision->frame_num;
spin_lock_irqsave(&usbvision->queue_lock, lock_flags);
list_move_tail(&(frame->frame), &usbvision->outqueue);
usbvision->cur_frame = 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 = frame_state_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->isoc_err_count++;
continue;
}
/* Detect and ignore empty packets */
if (packet_len < 0) {
PDEBUG(DBG_ISOC, "error packet [%d]", i);
usbvision->isoc_skip_count++;
continue;
} else if (packet_len == 0) { /* Frame end ????? */
PDEBUG(DBG_ISOC, "null packet [%d]", i);
usbvision->isocstate = isoc_state_no_frame;
usbvision->isoc_skip_count++;
continue;
} else if (packet_len > usbvision->isoc_packet_size) {
PDEBUG(DBG_ISOC, "packet[%d] > isoc_packet_size", i);
usbvision->isoc_skip_count++;
continue;
}
PDEBUG(DBG_ISOC, "packet ok [%d] len=%d", i, packet_len);
if (usbvision->isocstate == isoc_state_no_frame) { /* new frame begins */
usbvision->isocstate = isoc_state_in_frame;
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->isoc_data_count += packet_len;
usbvision->isoc_packet_count++;
}
#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_isoc_irq(struct urb *urb)
{
int err_code = 0;
int len;
struct usb_usbvision *usbvision = urb->context;
int i;
unsigned long start_time = 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->cur_frame;
/* Manage streaming interruption */
if (usbvision->streaming == stream_interrupt) {
usbvision->streaming = stream_idle;
if ((*f)) {
(*f)->grabstate = frame_state_ready;
(*f)->scanstate = scan_state_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->isoc_urb_count++;
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->time_in_irq += jiffies - start_time;
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;
err_code = usb_submit_urb(urb, GFP_ATOMIC);
if (err_code) {
dev_err(&usbvision->dev->dev,
"%s: usb_submit_urb failed: error %d\n",
__func__, err_code);
}
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 err_code = 0;
unsigned char *buffer = usbvision->ctrl_urb_buffer;
if (!USBVISION_IS_OPERATIONAL(usbvision))
return -1;
err_code = 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 (err_code < 0) {
dev_err(&usbvision->dev->dev,
"%s: failed: error %d\n", __func__, err_code);
return err_code;
}
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 err_code = 0;
if (!USBVISION_IS_OPERATIONAL(usbvision))
return 0;
usbvision->ctrl_urb_buffer[0] = value;
err_code = 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,
usbvision->ctrl_urb_buffer, 1, HZ);
if (err_code < 0) {
dev_err(&usbvision->dev->dev,
"%s: failed: error %d\n", __func__, err_code);
}
return err_code;
}
static void usbvision_ctrl_urb_complete(struct urb *urb)
{
struct usb_usbvision *usbvision = (struct usb_usbvision *)urb->context;
PDEBUG(DBG_IRQ, "");
usbvision->ctrl_urb_busy = 0;
}
static int usbvision_write_reg_irq(struct usb_usbvision *usbvision, int address,
unsigned char *data, int len)
{
int err_code = 0;
PDEBUG(DBG_IRQ, "");
if (len > 8)
return -EFAULT;
if (usbvision->ctrl_urb_busy)
return -EBUSY;
usbvision->ctrl_urb_busy = 1;
usbvision->ctrl_urb_setup.bRequestType = USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_ENDPOINT;
usbvision->ctrl_urb_setup.bRequest = USBVISION_OP_CODE;
usbvision->ctrl_urb_setup.wValue = 0;
usbvision->ctrl_urb_setup.wIndex = cpu_to_le16(address);
usbvision->ctrl_urb_setup.wLength = cpu_to_le16(len);
usb_fill_control_urb(usbvision->ctrl_urb, usbvision->dev,
usb_sndctrlpipe(usbvision->dev, 1),
(unsigned char *)&usbvision->ctrl_urb_setup,
(void *)usbvision->ctrl_urb_buffer, len,
usbvision_ctrl_urb_complete,
(void *)usbvision);
memcpy(usbvision->ctrl_urb_buffer, data, len);
err_code = usb_submit_urb(usbvision->ctrl_urb, GFP_ATOMIC);
if (err_code < 0) {
/* error in usb_submit_urb() */
usbvision->ctrl_urb_busy = 0;
}
PDEBUG(DBG_IRQ, "submit %d byte: error %d", len, err_code);
return err_code;
}
static int usbvision_init_compression(struct usb_usbvision *usbvision)
{
usbvision->last_isoc_frame_num = -1;
usbvision->isoc_data_count = 0;
usbvision->isoc_packet_count = 0;
usbvision->isoc_skip_count = 0;
usbvision->compr_level = 50;
usbvision->last_compr_level = -1;
usbvision->isoc_urb_count = 0;
usbvision->request_intra = 1;
usbvision->isoc_measure_bandwidth_count = 0;
return 0;
}
/* this function measures the used bandwidth since last call
* return: 0 : no error
* sets used_bandwidth to 1-100 : 1-100% of full bandwidth resp. to isoc_packet_size
*/
static int usbvision_measure_bandwidth(struct usb_usbvision *usbvision)
{
if (usbvision->isoc_measure_bandwidth_count < 2) { /* this gives an average bandwidth of 3 frames */
usbvision->isoc_measure_bandwidth_count++;
return 0;
}
if ((usbvision->isoc_packet_size > 0) && (usbvision->isoc_packet_count > 0)) {
usbvision->used_bandwidth = usbvision->isoc_data_count /
(usbvision->isoc_packet_count + usbvision->isoc_skip_count) *
100 / usbvision->isoc_packet_size;
}
usbvision->isoc_measure_bandwidth_count = 0;
usbvision->isoc_data_count = 0;
usbvision->isoc_packet_count = 0;
usbvision->isoc_skip_count = 0;
return 0;
}
static int usbvision_adjust_compression(struct usb_usbvision *usbvision)
{
int err_code = 0;
unsigned char buffer[6];
PDEBUG(DBG_IRQ, "");
if ((adjust_compression) && (usbvision->used_bandwidth > 0)) {
usbvision->compr_level += (usbvision->used_bandwidth - 90) / 2;
RESTRICT_TO_RANGE(usbvision->compr_level, 0, 100);
if (usbvision->compr_level != usbvision->last_compr_level) {
int distortion;
if (usbvision->bridge_type == BRIDGE_NT1004 || usbvision->bridge_type == BRIDGE_NT1005) {
buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM Threshold 1 */
buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM Threshold 2 */
distortion = 7 + 248 * usbvision->compr_level / 100;
buffer[2] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (inter) */
buffer[3] = (unsigned char)(distortion & 0xFF); /* Average distortion Threshold (intra) */
distortion = 1 + 42 * usbvision->compr_level / 100;
buffer[4] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (inter) */
buffer[5] = (unsigned char)(distortion & 0xFF); /* Maximum distortion Threshold (intra) */
} else { /* BRIDGE_NT1003 */
buffer[0] = (unsigned char)(4 + 16 * usbvision->compr_level / 100); /* PCM threshold 1 */
buffer[1] = (unsigned char)(4 + 8 * usbvision->compr_level / 100); /* PCM threshold 2 */
distortion = 2 + 253 * usbvision->compr_level / 100;
buffer[2] = (unsigned char)(distortion & 0xFF); /* distortion threshold bit0-7 */
buffer[3] = 0; /* (unsigned char)((distortion >> 8) & 0x0F); distortion threshold bit 8-11 */
distortion = 0 + 43 * usbvision->compr_level / 100;
buffer[4] = (unsigned char)(distortion & 0xFF); /* maximum distortion bit0-7 */
buffer[5] = 0; /* (unsigned char)((distortion >> 8) & 0x01); maximum distortion bit 8 */
}
err_code = usbvision_write_reg_irq(usbvision, USBVISION_PCM_THR1, buffer, 6);
if (err_code == 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->last_compr_level = usbvision->compr_level;
}
}
}
return err_code;
}
static int usbvision_request_intra(struct usb_usbvision *usbvision)
{
unsigned char buffer[1];
PDEBUG(DBG_IRQ, "");
usbvision->request_intra = 1;
buffer[0] = 1;
usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
return 0;
}
static int usbvision_unrequest_intra(struct usb_usbvision *usbvision)
{
unsigned char buffer[1];
PDEBUG(DBG_IRQ, "");
usbvision->request_intra = 0;
buffer[0] = 0;
usbvision_write_reg_irq(usbvision, USBVISION_FORCE_INTRA, buffer, 1);
return 0;
}
/*******************************
* usbvision utility functions
*******************************/
int usbvision_power_off(struct usb_usbvision *usbvision)
{
int err_code = 0;
PDEBUG(DBG_FUNC, "");
err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG, USBVISION_SSPND_EN);
if (err_code == 1)
usbvision->power = 0;
PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code != 1) ? "ERROR" : "power is off", err_code);
return err_code;
}
/* configure webcam image sensor using the serial port */
static int usbvision_init_webcam(struct usb_usbvision *usbvision)
{
int rc;
int i;
static char init_values[38][3] = {
{ 0x04, 0x12, 0x08 }, { 0x05, 0xff, 0xc8 }, { 0x06, 0x18, 0x07 }, { 0x07, 0x90, 0x00 },
{ 0x09, 0x00, 0x00 }, { 0x0a, 0x00, 0x00 }, { 0x0b, 0x08, 0x00 }, { 0x0d, 0xcc, 0xcc },
{ 0x0e, 0x13, 0x14 }, { 0x10, 0x9b, 0x83 }, { 0x11, 0x5a, 0x3f }, { 0x12, 0xe4, 0x73 },
{ 0x13, 0x88, 0x84 }, { 0x14, 0x89, 0x80 }, { 0x15, 0x00, 0x20 }, { 0x16, 0x00, 0x00 },
{ 0x17, 0xff, 0xa0 }, { 0x18, 0x6b, 0x20 }, { 0x19, 0x22, 0x40 }, { 0x1a, 0x10, 0x07 },
{ 0x1b, 0x00, 0x47 }, { 0x1c, 0x03, 0xe0 }, { 0x1d, 0x00, 0x00 }, { 0x1e, 0x00, 0x00 },
{ 0x1f, 0x00, 0x00 }, { 0x20, 0x00, 0x00 }, { 0x21, 0x00, 0x00 }, { 0x22, 0x00, 0x00 },
{ 0x23, 0x00, 0x00 }, { 0x24, 0x00, 0x00 }, { 0x25, 0x00, 0x00 }, { 0x26, 0x00, 0x00 },
{ 0x27, 0x00, 0x00 }, { 0x28, 0x00, 0x00 }, { 0x29, 0x00, 0x00 }, { 0x08, 0x80, 0x60 },
{ 0x0f, 0x2d, 0x24 }, { 0x0c, 0x80, 0x80 }
};
unsigned char *value = usbvision->ctrl_urb_buffer;
/* the only difference between PAL and NTSC init_values */
if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_NTSC)
init_values[4][1] = 0x34;
for (i = 0; i < sizeof(init_values) / 3; i++) {
usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
memcpy(value, init_values[i], 3);
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_SER_DAT1, value,
3, HZ);
if (rc < 0)
return rc;
usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SIO);
/* write 3 bytes to the serial port using SIO mode */
usbvision_write_reg(usbvision, USBVISION_SER_CONT, 3 | 0x10);
usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, 0);
usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT);
usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, USBVISION_IO_2);
usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT);
usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_DAT_IO);
usbvision_write_reg(usbvision, USBVISION_SER_MODE, USBVISION_SER_MODE_SOFT | USBVISION_CLK_OUT | USBVISION_DAT_IO);
}
return 0;
}
/*
* usbvision_set_video_format()
*
*/
static int usbvision_set_video_format(struct usb_usbvision *usbvision, int format)
{
static const char proc[] = "usbvision_set_video_format";
unsigned char *value = usbvision->ctrl_urb_buffer;
int rc;
if (!USBVISION_IS_OPERATIONAL(usbvision))
return 0;
PDEBUG(DBG_FUNC, "isoc_mode %#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->isoc_mode = format;
return rc;
}
/*
* usbvision_set_output()
*
*/
int usbvision_set_output(struct usb_usbvision *usbvision, int width,
int height)
{
int err_code = 0;
int usb_width, usb_height;
unsigned int frame_rate = 0, frame_drop = 0;
unsigned char *value = usbvision->ctrl_urb_buffer;
if (!USBVISION_IS_OPERATIONAL(usbvision))
return 0;
if (width > MAX_USB_WIDTH) {
usb_width = width / 2;
usbvision->stretch_width = 2;
} else {
usb_width = width;
usbvision->stretch_width = 1;
}
if (height > MAX_USB_HEIGHT) {
usb_height = height / 2;
usbvision->stretch_height = 2;
} else {
usb_height = height;
usbvision->stretch_height = 1;
}
RESTRICT_TO_RANGE(usb_width, MIN_FRAME_WIDTH, MAX_USB_WIDTH);
usb_width &= ~(MIN_FRAME_WIDTH-1);
RESTRICT_TO_RANGE(usb_height, MIN_FRAME_HEIGHT, MAX_USB_HEIGHT);
usb_height &= ~(1);
PDEBUG(DBG_FUNC, "usb %dx%d; screen %dx%d; stretch %dx%d",
usb_width, usb_height, width, height,
usbvision->stretch_width, usbvision->stretch_height);
/* I'll not rewrite the same values */
if ((usb_width != usbvision->curwidth) || (usb_height != usbvision->curheight)) {
value[0] = usb_width & 0xff; /* LSB */
value[1] = (usb_width >> 8) & 0x03; /* MSB */
value[2] = usb_height & 0xff; /* LSB */
value[3] = (usb_height >> 8) & 0x03; /* MSB */
err_code = 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 (err_code < 0) {
dev_err(&usbvision->dev->dev,
"%s failed: error %d\n", __func__, err_code);
return err_code;
}
usbvision->curwidth = usbvision->stretch_width * usb_width;
usbvision->curheight = usbvision->stretch_height * usb_height;
}
if (usbvision->isoc_mode == ISOC_MODE_YUV422)
frame_rate = (usbvision->isoc_packet_size * 1000) / (usb_width * usb_height * 2);
else if (usbvision->isoc_mode == ISOC_MODE_YUV420)
frame_rate = (usbvision->isoc_packet_size * 1000) / ((usb_width * usb_height * 12) / 8);
else
frame_rate = FRAMERATE_MAX;
if (usbvision->tvnorm_id & V4L2_STD_625_50)
frame_drop = frame_rate * 32 / 25 - 1;
else if (usbvision->tvnorm_id & V4L2_STD_525_60)
frame_drop = frame_rate * 32 / 30 - 1;
RESTRICT_TO_RANGE(frame_drop, FRAMERATE_MIN, FRAMERATE_MAX);
PDEBUG(DBG_FUNC, "frame_rate %d fps, frame_drop %d", frame_rate, frame_drop);
frame_drop = FRAMERATE_MAX; /* We can allow the maximum here, because dropping is controlled */
if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
if (usbvision_device_data[usbvision->dev_model].video_norm == V4L2_STD_PAL)
frame_drop = 25;
else
frame_drop = 30;
}
/* frame_drop = 7; => frame_phase = 1, 5, 9, 13, 17, 21, 25, 0, 4, 8, ...
=> frame_skip = 4;
=> frame_rate = (7 + 1) * 25 / 32 = 200 / 32 = 6.25;
frame_drop = 9; => frame_phase = 1, 5, 8, 11, 14, 17, 21, 24, 27, 1, 4, 8, ...
=> frame_skip = 4, 3, 3, 3, 3, 4, 3, 3, 3, 3, 4, ...
=> frame_rate = (9 + 1) * 25 / 32 = 250 / 32 = 7.8125;
*/
err_code = usbvision_write_reg(usbvision, USBVISION_FRM_RATE, frame_drop);
return err_code;
}
/*
* 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;
usbvision->fbuf = usbvision_rvmalloc(usbvision->fbuf_size);
if (usbvision->fbuf)
break;
usbvision->num_frames--;
}
/* Allocate all buffers */
for (i = 0; i < usbvision->num_frames; i++) {
usbvision->frame[i].index = i;
usbvision->frame[i].grabstate = frame_state_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 = frame_state_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 = usbvision->ctrl_urb_buffer;
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->bridge_type == BRIDGE_NT1004) {
value[0] = 20; /* PCM Threshold 1 */
value[1] = 12; /* PCM Threshold 2 */
value[2] = 255; /* Distortion Threshold inter */
value[3] = 255; /* Distortion Threshold intra */
value[4] = 43; /* Max Distortion inter */
value[5] = 43; /* Max Distortion intra */
} else {
value[0] = 20; /* PCM Threshold 1 */
value[1] = 12; /* PCM Threshold 2 */
value[2] = 255; /* Distortion Threshold d7-d0 */
value[3] = 0; /* Distortion Threshold d11-d8 */
value[4] = 43; /* Max Distortion d7-d0 */
value[5] = 0; /* Max Distortion 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;
}
/*
* 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 = usbvision->ctrl_urb_buffer;
unsigned char dvi_yuv_value;
if (!USBVISION_IS_OPERATIONAL(usbvision))
return 0;
/* Set input format expected from decoder*/
if (usbvision_device_data[usbvision->dev_model].vin_reg1_override) {
value[0] = usbvision_device_data[usbvision->dev_model].vin_reg1;
} else if (usbvision_device_data[usbvision->dev_model].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 */
}
/* webcam is only 480 pixels wide, both PAL and NTSC version */
if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
value[0] = 0xe0;
value[1] = 0x01; /* 0x01E0 -> 480 Input video line length */
}
if (usbvision_device_data[usbvision->dev_model].x_offset >= 0) {
value[4] = usbvision_device_data[usbvision->dev_model].x_offset & 0xff;
value[5] = (usbvision_device_data[usbvision->dev_model].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->dev_model].y_offset >= 0) {
value[6] = usbvision_device_data[usbvision->dev_model].y_offset & 0xff;
value[7] = (usbvision_device_data[usbvision->dev_model].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->dev_model].dvi_yuv_override) {
dvi_yuv_value = usbvision_device_data[usbvision->dev_model].dvi_yuv;
} else if (usbvision_device_data[usbvision->dev_model].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)
{
unsigned char *value = usbvision->ctrl_urb_buffer;
int rc;
if (usbvision->isoc_mode == 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) {
dev_err(&usbvision->dev->dev, "%s: ERROR=%d\n", __func__, rc);
return rc;
}
/* Restart the video buffer logic */
rc = usbvision_write_reg(usbvision, USBVISION_DRM_CONT, USBVISION_RES_UR |
USBVISION_RES_FDL | USBVISION_RES_VDW);
if (rc < 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 err_code = 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);
if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM) {
usbvision_write_reg(usbvision, USBVISION_VIN_REG1,
USBVISION_16_422_SYNC | USBVISION_HVALID_PO);
usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
USBVISION_NOHVALID | USBVISION_KEEP_BLANK);
}
usbvision_write_reg(usbvision, USBVISION_PWR_REG,
USBVISION_SSPND_EN | USBVISION_PWR_VID);
mdelay(10);
err_code = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
USBVISION_SSPND_EN | USBVISION_PWR_VID | USBVISION_RES2);
if (err_code == 1)
usbvision->power = 1;
PDEBUG(DBG_FUNC, "%s: err_code %d", (err_code < 0) ? "ERROR" : "power is on", err_code);
return err_code;
}
/*
* 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)
{
if (usbvision->isoc_mode == ISOC_MODE_COMPRESS)
usbvision_init_compression(usbvision);
return usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
USBVISION_NOHVALID | usbvision->vin_reg2_preset);
}
/*
* 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;
ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
USBVISION_SSPND_EN | USBVISION_PWR_VID);
if (ret < 0)
return ret;
ret = usbvision_write_reg(usbvision, USBVISION_PWR_REG,
USBVISION_SSPND_EN | USBVISION_PWR_VID |
USBVISION_RES2);
if (ret < 0)
return ret;
ret = usbvision_write_reg(usbvision, USBVISION_VIN_REG2,
USBVISION_KEEP_BLANK | USBVISION_NOHVALID |
usbvision->vin_reg2_preset);
if (ret < 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 write reg\n");
return -1;
}
usbvision->audio_mute = 0;
usbvision->audio_channel = USBVISION_AUDIO_MUTE;
return 0;
}
int usbvision_set_audio(struct usb_usbvision *usbvision, int audio_channel)
{
if (!usbvision->audio_mute) {
if (usbvision_write_reg(usbvision, USBVISION_IOPIN_REG, audio_channel) < 0) {
printk(KERN_ERR "usbvision_set_audio: can't write iopin register for audio switching\n");
return -1;
}
}
usbvision->audio_channel = audio_channel;
return 0;
}
int usbvision_setup(struct usb_usbvision *usbvision, int format)
{
if (usbvision_device_data[usbvision->dev_model].codec == CODEC_WEBCAM)
usbvision_init_webcam(usbvision);
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 err_code, prev_alt = dev->iface_alt;
int i;
dev->iface_alt = 0;
for (i = 0; i < dev->num_alt; i++)
if (dev->alt_max_pkt_size[i] > dev->alt_max_pkt_size[dev->iface_alt])
dev->iface_alt = i;
if (dev->iface_alt != prev_alt) {
dev->isoc_packet_size = dev->alt_max_pkt_size[dev->iface_alt];
PDEBUG(DBG_FUNC, "setting alternate %d with max_packet_size=%u",
dev->iface_alt, dev->isoc_packet_size);
err_code = usb_set_interface(dev->dev, dev->iface, dev->iface_alt);
if (err_code < 0) {
dev_err(&dev->dev->dev,
"cannot change alternate number to %d (error=%i)\n",
dev->iface_alt, err_code);
return err_code;
}
}
PDEBUG(DBG_ISOC, "ISO Packet Length:%d", dev->isoc_packet_size);
return 0;
}
/*
* usbvision_init_isoc()
*
*/
int usbvision_init_isoc(struct usb_usbvision *usbvision)
{
struct usb_device *dev = usbvision->dev;
int buf_idx, err_code, reg_value;
int sb_size;
if (!USBVISION_IS_OPERATIONAL(usbvision))
return -EFAULT;
usbvision->cur_frame = NULL;
scratch_reset(usbvision);
/* Alternate interface 1 is is the biggest frame size */
err_code = usbvision_set_alternate(usbvision);
if (err_code < 0) {
usbvision->last_error = err_code;
return -EBUSY;
}
sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
reg_value = (16 - usbvision_read_reg(usbvision,
USBVISION_ALTER_REG)) & 0x0F;
usbvision->usb_bandwidth = reg_value >> 1;
PDEBUG(DBG_ISOC, "USB Bandwidth Usage: %dMbit/Sec",
usbvision->usb_bandwidth);
/* We double buffer the Iso lists */
for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
int j, k;
struct urb *urb;
urb = usb_alloc_urb(USBVISION_URB_FRAMES, GFP_KERNEL);
if (urb == NULL)
return -ENOMEM;
usbvision->sbuf[buf_idx].urb = urb;
usbvision->sbuf[buf_idx].data =
usb_alloc_coherent(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_NO_TRANSFER_DMA_MAP;
urb->interval = 1;
urb->transfer_buffer = usbvision->sbuf[buf_idx].data;
urb->complete = usbvision_isoc_irq;
urb->number_of_packets = USBVISION_URB_FRAMES;
urb->transfer_buffer_length =
usbvision->isoc_packet_size * USBVISION_URB_FRAMES;
for (j = k = 0; j < USBVISION_URB_FRAMES; j++,
k += usbvision->isoc_packet_size) {
urb->iso_frame_desc[j].offset = k;
urb->iso_frame_desc[j].length =
usbvision->isoc_packet_size;
}
}
/* Submit all URBs */
for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
err_code = usb_submit_urb(usbvision->sbuf[buf_idx].urb,
GFP_KERNEL);
if (err_code) {
dev_err(&usbvision->dev->dev,
"%s: usb_submit_urb(%d) failed: error %d\n",
__func__, buf_idx, err_code);
}
}
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 buf_idx, err_code, reg_value;
int sb_size = USBVISION_URB_FRAMES * usbvision->isoc_packet_size;
if ((usbvision->streaming == stream_off) || (usbvision->dev == NULL))
return;
/* Unschedule all of the iso td's */
for (buf_idx = 0; buf_idx < USBVISION_NUMSBUF; buf_idx++) {
usb_kill_urb(usbvision->sbuf[buf_idx].urb);
if (usbvision->sbuf[buf_idx].data) {
usb_free_coherent(usbvision->dev,
sb_size,
usbvision->sbuf[buf_idx].data,
usbvision->sbuf[buf_idx].urb->transfer_dma);
}
usb_free_urb(usbvision->sbuf[buf_idx].urb);
usbvision->sbuf[buf_idx].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->iface_alt = 0;
err_code = usb_set_interface(usbvision->dev, usbvision->iface,
usbvision->iface_alt);
if (err_code < 0) {
dev_err(&usbvision->dev->dev,
"%s: usb_set_interface() failed: error %d\n",
__func__, err_code);
usbvision->last_error = err_code;
}
reg_value = (16-usbvision_read_reg(usbvision, USBVISION_ALTER_REG)) & 0x0F;
usbvision->isoc_packet_size =
(reg_value == 0) ? 0 : (reg_value * 64) - 1;
PDEBUG(DBG_ISOC, "ISO Packet Length:%d",
usbvision->isoc_packet_size);
usbvision->usb_bandwidth = reg_value >> 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 };
/* 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->dev_model].codec) {
case CODEC_SAA7113:
mode[1] = SAA7115_COMPOSITE2;
if (switch_svideo_input) {
/* To handle problems with S-Video Input for
* some devices. Use switch_svideo_input
* 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;
}
call_all(usbvision, video, s_routing, mode[channel], 0, 0);
usbvision_set_audio(usbvision, audio[channel]);
return 0;
}
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