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    /minsoc/trunk/utils
    from Rev 157 to Rev 154
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Rev 157 → Rev 154

/cable_parallel.c
0,0 → 1,219
/* cable_parallel.c - Parallel cable drivers (XPC3 and XESS) for the Advanced JTAG Bridge
Copyright (C) 2001 Marko Mlinar, markom@opencores.org
 
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 <stdio.h>
#include <unistd.h>
 
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <linux/ppdev.h>
#include <linux/ioctl.h>
#include <linux/parport.h>
 
#include "cable_common.h"
#include "errcodes.h"
 
 
// Common functions used by both cable types
static int cable_parallel_out(uint8_t value);
static int cable_parallel_inout(uint8_t value, uint8_t *inval);
 
 
int fd;
 
 
 
/////////////////////////////////////////////////////////////////////////////////
/*-------------------------------------[ Parallel port specific functions ]---*/
///////////////////////////////////////////////////////////////////////////////
 
int cable_parallel_init()
{
/*
//#ifndef WIN32
if (ioperm(base, 3, 1)) {
fprintf(stderr, "Couldn't get the port at %x\n", base);
perror("Root privileges are required.\n");
return APP_ERR_INIT_FAILED;
}
printf("Connected to parallel port at %x\n", base);
printf("Dropping root privileges.\n");
setreuid(getuid(), getuid());
//#endif
*/
int mode = IEEE1284_MODE_COMPAT;
fd = open("/dev/parport0", O_RDWR | O_NONBLOCK);
if (fd == -1)
{
perror("Not able to acquire the device desriptor\n");
return APP_ERR_INIT_FAILED;
}
if (ioctl(fd, PPCLAIM) == -1)
{
perror("Fail to claim the interface for itself.\n");
return APP_ERR_INIT_FAILED;
}
if (ioctl(fd, PPSETMODE, &mode) == -1)
{
perror("Setting compatibility mode failed.\n");
return APP_ERR_INIT_FAILED;
}
 
return APP_ERR_NONE;
}
 
 
int cable_parallel_opt(int c, char *str)
{
switch(c) {
case 'p':
// if(!sscanf(str, "%x", &base)) {
// fprintf(stderr, "p parameter must have a hex number as parameter\n");
return APP_ERR_BAD_PARAM;
// }
break;
default:
fprintf(stderr, "Unknown parameter '%c'\n", c);
return APP_ERR_BAD_PARAM;
}
return APP_ERR_NONE;
}
 
/*-----------------------------------------[ Physical board wait function ]---*/
void cable_parallel_phys_wait()
{
/* Multiple users have reported poor performance of parallel cables,
* which has been traced to usleep() sleeping much longer than
* microseconds. The same users have reported error-free functionality
* and an order of magnitude improvement in upload speed.
* If you get strange data errors while running, add this sleep back
* in, or perhaps a busy-wait delay.
*/
/* usleep(10); */
}
 
/*----------------------------------------------[ xpc3 specific functions ]---*/
int cable_xpc3_out(uint8_t value)
{
uint8_t out = 0;
 
/* First convert the bits in value byte to the ones that the cable wants */
if(value & TCLK_BIT)
out |= 0x02; /* D1 pin 3 */
if(value & TRST_BIT)
out |= 0x10; /* Not used */
if(value & TDI_BIT)
out |= 0x01; /* D0 pin 2 */
if(value & TMS_BIT)
out |= 0x04; /* D2 pin 4 */
 
return cable_parallel_out(out);
}
 
int cable_xpc3_inout(uint8_t value, uint8_t *inval)
{
uint8_t in;
int retval;
uint8_t out = 0;
 
/* First convert the bits in value byte to the ones that the cable wants */
if(value & TCLK_BIT)
out |= 0x02; /* D1 pin 3 */
if(value & TRST_BIT)
out |= 0x10; /* Not used */
if(value & TDI_BIT)
out |= 0x01; /* D0 pin 2 */
if(value & TMS_BIT)
out |= 0x04; /* D2 pin 4 */
 
retval = cable_parallel_inout(out, &in);
 
if(in & 0x10) /* S6 pin 13 */
*inval = 1;
else
*inval = 0;
 
return retval;
}
 
/*----------------------------------------------[ xess specific functions ]---*/
int cable_xess_out(uint8_t value)
{
uint8_t out = 0;
 
/* First convert the bits in value byte to the ones that the cable wants */
if(value & TCLK_BIT)
out |= 0x04; /* D2 pin 4 */
if(value & TRST_BIT)
out |= 0x08; /* D3 pin 5 */
if(value & TDI_BIT)
out |= 0x10; /* D4 pin 6 */
if(value & TMS_BIT)
out |= 0x20; /* D3 pin 5 */
 
return cable_parallel_out(out);
}
 
uint8_t cable_xess_inout(uint8_t value, uint8_t *inval)
{
uint8_t in;
int retval;
uint8_t out = 0;
 
/* First convert the bits in value byte to the ones that the cable wants */
if(value & TCLK_BIT)
out |= 0x04; /* D2 pin 4 */
if(value & TRST_BIT)
out |= 0x08; /* D3 pin 5 */
if(value & TDI_BIT)
out |= 0x10; /* D4 pin 6 */
if(value & TMS_BIT)
out |= 0x20; /* D3 pin 5 */
 
retval = cable_parallel_inout(out, &in);
 
if(in & 0x20) /* S5 pin 12*/
*inval = 1;
else
*inval = 0;
 
return retval;
}
 
 
/*----------------------------------------------[ common helper functions ]---*/
// 'static' for internal access only
 
static int cable_parallel_out(uint8_t value)
{
ioctl(fd, PPWDATA, &value);
 
return APP_ERR_NONE;
}
 
static int cable_parallel_inout(uint8_t value, uint8_t *inval)
{
ioctl(fd, PPRSTATUS, inval);
ioctl(fd, PPWDATA, &value);
 
return APP_ERR_NONE;
}
cable_parallel.c Property changes : Added: svn:executable ## -0,0 +1 ## +* \ No newline at end of property

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