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/*
* Copyright 1999/2000 by Henning Zabel <henning@uni-paderborn.de>
*
* 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.
*/
/*
* gphoto driver for the Mustek MDC800 Digital Camera. The driver
* supports rs232 and USB.
*/
#define _DEFAULT_SOURCE
/*
Implemenation of the USB Version of ExecuteCommand
*/
#include <string.h>
#include <gphoto2/gphoto2-library.h>
#include <gphoto2/gphoto2-result.h>
#include "print.h"
#include "usb.h"
#include "io.h"
#include "mdc800_spec.h"
#include <fcntl.h>
#include <sys/time.h>
/*
* Checks wether the camera responds busy
*/
static int mdc800_usb_isBusy (unsigned char* ch)
{
int i;
for (i=0;i<8;i++)
if (ch [i] != 0x99)
return 0;
return 1;
}
/*
* Checks wether the Camera is ready
*/
static int mdc800_usb_isReady (unsigned char *ch)
{
int i;
for (i=0;i<8;i++)
if (ch [i] != 0xbb)
return 0;
return 1;
}
/*
* Waits for the camera
* type: 0: Wait until the camera gets ready
* 1: Read data from irq
* The function stores the readen 8 Bytes in data.
* and return 0 on success else -1.
*/
static int mdc800_usb_readFromIrq (GPPort *port,int type,unsigned char* data,int timeout)
{
int ret;
struct timeval tv;
gp_port_set_timeout(port,1);
timeout+=10*MDC800_USB_IRQ_INTERVAL;
gettimeofday(&tv,NULL);
while (timeout>=0)
{
/* try a read */
ret = gp_port_check_int(port,(char*)data,8);
if (ret!=8)
{
printCError ("(mdc800_usb_readFromIRQ) reading bytes from irq fails (%d)\n",ret);
return ret;
}
if (0) {
int i=0;
printf ("irq :");
for (i=0; i<8; i++)
{
printf ("%i ", data [i]);
}
printf ("\n");
}
/* check data */
if (type)
{
if (!(mdc800_usb_isReady(data)||mdc800_usb_isBusy(data))) {
fprintf(stderr,"got data.\n");
/* Data received successfull */
return GP_OK;
}
} else {
if (mdc800_usb_isReady (data))
{
fprintf(stderr,"got readiness.\n");
/* Camera response ready */
return GP_OK;
}
}
/* wait the specified time */
if (1) {
usleep(MDC800_USB_IRQ_INTERVAL * 1000);
timeout-=MDC800_USB_IRQ_INTERVAL;
}
}
/* Timeout */
printCError ("(mdc800_usb_readFromIrq) timeout\n");
return GP_ERROR_IO;
}
int mdc800_usb_sendCommand(GPPort*port,unsigned char*command,unsigned char*buffer,int length)
{
unsigned char tmp_buffer [16];
GPPortSettings settings;
int ret;
printf ("(mdc800_usb_sendCommand) id:%i (%i,%i,%i,%i,%i,%i),answer:%i\n",command[1],command[2],command[3],command[4],command[5],command[6],command[7],length);
/* Send the Command */
gp_port_set_timeout(port,MDC800_DEFAULT_TIMEOUT);
gp_port_get_settings(port,&settings);
settings.usb.outep = MDC800_USB_ENDPOINT_COMMAND;
gp_port_set_settings(port,settings);
ret = mdc800_usb_readFromIrq(port,0,tmp_buffer,MDC800_DEFAULT_TIMEOUT);
if (ret != GP_OK) {
fprintf(stderr,"Camera did not get ready before mdc800_usb_sendCommand!\n");
}
if ((ret=gp_port_write(port,(char*)command,8)) != 8)
{
printCError ("(mdc800_usb_sendCommand) sending Command fails (%d)!\n",ret);
return ret;
}
/* receive the answer */
switch (command [1])
{
case COMMAND_GET_THUMBNAIL:
case COMMAND_GET_IMAGE:
gp_port_set_timeout (port, 2000);
if (gp_port_read (port,(char*)buffer,64) != 64)
{
printCError ("(mdc800_usb_sendCommand) requesting 64Byte dummy data fails.\n");
return GP_ERROR_IO;
}
fprintf(stderr,"got 64 byte\n");
{ /* Download loop */
int readen=0;
while (readen < length)
{
if (gp_port_read(port,(char*)(buffer+readen),64) != 64)
{
printCError ("(mdc800_usb_sendCommand) reading image data fails.\n");
return 0;
}
fprintf(stderr,"got 64 byte\n");
readen+=64;
}
}
break;
default :
if (length > 0)
{
ret = mdc800_usb_readFromIrq (port,1,tmp_buffer, mdc800_io_getCommandTimeout(command[1]));
if (ret != GP_OK)
{
/* Reading fails */
printCError ("(mdc800_usb_sendCommand) receiving answer fails (%d).\n",ret);
return ret;
}
memcpy(buffer,tmp_buffer,length);
}
}
#if 1
/* Waiting for camera to get ready */
ret = mdc800_usb_readFromIrq(port,0,tmp_buffer,mdc800_io_getCommandTimeout (command[1]));
if (ret!=GP_OK)
{
/* Reading fails */
printCError ("(mdc800_usb_sendCommand) camera didn't get ready in the defined intervall ?!\n");
return ret;
}
#endif
return GP_OK;
}
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