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/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2000-2004 Brian S. Dean <bsd@bsdhome.com>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* $Id: ppi.c 925 2010-01-17 16:58:06Z joerg_wunsch $ */
#if !defined(WIN32NATIVE)
#include "ac_cfg.h"
#if HAVE_PARPORT
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
# include "freebsd_ppi.h"
#elif defined(__linux__)
# include "linux_ppdev.h"
#elif defined(__sun__) || defined(__sun) /* Solaris */
# include "solaris_ecpp.h"
#endif
#include "avrdude.h"
#include "avr.h"
#include "pindefs.h"
#include "pgm.h"
#include "ppi.h"
enum {
PPI_READ,
PPI_WRITE,
PPI_SHADOWREAD
};
static int ppi_shadow_access(union filedescriptor *fdp, int reg,
unsigned char *v, unsigned char action)
{
static unsigned char shadow[3];
int shadow_num;
switch (reg) {
case PPIDATA:
shadow_num = 0;
break;
case PPICTRL:
shadow_num = 1;
break;
case PPISTATUS:
shadow_num = 2;
break;
default:
fprintf(stderr, "%s: avr_set(): invalid register=%d\n",
progname, reg);
return -1;
break;
}
switch (action) {
case PPI_SHADOWREAD:
*v = shadow[shadow_num];
break;
case PPI_READ:
DO_PPI_READ(fdp->ifd, reg, v);
shadow[shadow_num]=*v;
break;
case PPI_WRITE:
shadow[shadow_num]=*v;
DO_PPI_WRITE(fdp->ifd, reg, v);
break;
}
return 0;
}
/*
* set the indicated bit of the specified register.
*/
int ppi_set(union filedescriptor *fdp, int reg, int bit)
{
unsigned char v;
int rc;
rc = ppi_shadow_access(fdp, reg, &v, PPI_SHADOWREAD);
v |= bit;
rc |= ppi_shadow_access(fdp, reg, &v, PPI_WRITE);
if (rc)
return -1;
return 0;
}
/*
* clear the indicated bit of the specified register.
*/
int ppi_clr(union filedescriptor *fdp, int reg, int bit)
{
unsigned char v;
int rc;
rc = ppi_shadow_access(fdp, reg, &v, PPI_SHADOWREAD);
v &= ~bit;
rc |= ppi_shadow_access(fdp, reg, &v, PPI_WRITE);
if (rc)
return -1;
return 0;
}
/*
* get the indicated bit of the specified register.
*/
int ppi_get(union filedescriptor *fdp, int reg, int bit)
{
unsigned char v;
int rc;
rc = ppi_shadow_access(fdp, reg, &v, PPI_READ);
v &= bit;
if (rc)
return -1;
return v; /* v == bit */
}
/*
* toggle the indicated bit of the specified register.
*/
int ppi_toggle(union filedescriptor *fdp, int reg, int bit)
{
unsigned char v;
int rc;
rc = ppi_shadow_access(fdp, reg, &v, PPI_SHADOWREAD);
v ^= bit;
rc |= ppi_shadow_access(fdp, reg, &v, PPI_WRITE);
if (rc)
return -1;
return 0;
}
/*
* get all bits of the specified register.
*/
int ppi_getall(union filedescriptor *fdp, int reg)
{
unsigned char v;
int rc;
rc = ppi_shadow_access(fdp, reg, &v, PPI_READ);
if (rc)
return -1;
return v; /* v == bit */
}
/*
* set all bits of the specified register to val.
*/
int ppi_setall(union filedescriptor *fdp, int reg, int val)
{
unsigned char v;
int rc;
v = val;
rc = ppi_shadow_access(fdp, reg, &v, PPI_WRITE);
if (rc)
return -1;
return 0;
}
void ppi_open(char * port, union filedescriptor *fdp)
{
int fd;
unsigned char v;
fd = open(port, O_RDWR);
if (fd < 0) {
fprintf(stderr, "%s: can't open device \"%s\": %s\n",
progname, port, strerror(errno));
fdp->ifd = -1;
return;
}
ppi_claim (fd);
/*
* Initialize shadow registers
*/
ppi_shadow_access (fdp, PPIDATA, &v, PPI_READ);
ppi_shadow_access (fdp, PPICTRL, &v, PPI_READ);
ppi_shadow_access (fdp, PPISTATUS, &v, PPI_READ);
fdp->ifd = fd;
}
void ppi_close(union filedescriptor *fdp)
{
ppi_release (fdp->ifd);
close(fdp->ifd);
}
#endif /* HAVE_PARPORT */
#endif /* !WIN32NATIVE */
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