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/*****************************************************************************/
/*
* ppdev.c -- Parport access via Linux PPDEV device.
*
* Copyright (C) 1998-1999 Thomas Sailer (sailer@ife.ee.ethz.ch)
*
* 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.
*
* Please note that the GPL allows you to use the driver, NOT the radio.
* In order to use the radio, you need a license from the communications
* authority of your country.
*
*/
/*****************************************************************************/
#include <sys/ioctl.h>
#include <unistd.h>
#include "parport.h"
#include "fpga.h"
#include "ppdev.h"
/* ---------------------------------------------------------------------- */
int pp_dev_fd = -1;
int pp_dev_mode;
/* ---------------------------------------------------------------------- */
void parport_dev_exit(void)
{
if (pp_dev_fd != -1) {
ioctl(pp_dev_fd, PPRELEASE, 0);
close(pp_dev_fd);
}
pp_dev_fd = -1;
}
/* ---------------------------------------------------------------------- */
static void setmode(int newmode)
{
int datadir = 0;
if (newmode == pp_dev_mode)
return;
pp_dev_mode = newmode;
ioctl(pp_dev_fd, PPSETMODE, &pp_dev_mode);
if (pp_dev_mode == IEEE1284_MODE_COMPAT)
ioctl(pp_dev_fd, PPDATADIR, &datadir);
}
/* ---------------------------------------------------------------------- */
unsigned char parport_dev_read_data(void)
{
unsigned char r;
ioctl(pp_dev_fd, PPRDATA, &r);
return r;
}
void parport_dev_write_data(unsigned char d)
{
setmode(IEEE1284_MODE_COMPAT);
ioctl(pp_dev_fd, PPWDATA, &d);
}
unsigned char parport_dev_read_status(void)
{
unsigned char r;
ioctl(pp_dev_fd, PPRSTATUS, &r);
return r;
}
unsigned char parport_dev_read_control(void)
{
unsigned char r;
ioctl(pp_dev_fd, PPRCONTROL, &r);
return r;
}
void parport_dev_write_control(unsigned char d)
{
ioctl(pp_dev_fd, PPWCONTROL, &d);
}
void parport_dev_frob_control(unsigned char mask, unsigned char val)
{
struct ppdev_frob_struct f = { mask, val };
ioctl(pp_dev_fd, PPFCONTROL, &f);
}
/* ---------------------------------------------------------------------- */
unsigned parport_dev_epp_write_data(const void *buf, unsigned sz)
{
ssize_t ret;
setmode(IEEE1284_MODE_EPP | IEEE1284_DATA);
ret = write(pp_dev_fd, buf, sz);
if (ret < 0)
return 0;
return ret;
}
unsigned parport_dev_epp_read_data(void *buf, unsigned sz)
{
ssize_t ret;
setmode(IEEE1284_MODE_EPP | IEEE1284_DATA);
ret = read(pp_dev_fd, buf, sz);
if (ret < 0)
return 0;
return ret;
}
unsigned parport_dev_epp_write_addr(const void *buf, unsigned sz)
{
ssize_t ret;
setmode(IEEE1284_MODE_EPP | IEEE1284_ADDR);
ret = write(pp_dev_fd, buf, sz);
if (ret < 0)
return 0;
return ret;
}
unsigned parport_dev_epp_read_addr(void *buf, unsigned sz)
{
ssize_t ret;
setmode(IEEE1284_MODE_EPP | IEEE1284_ADDR);
ret = read(pp_dev_fd, buf, sz);
if (ret < 0)
return 0;
return ret;
}
/* ---------------------------------------------------------------------- */
unsigned parport_dev_ecp_write_data(const void *buf, unsigned sz)
{
ssize_t ret;
setmode(IEEE1284_MODE_ECP | IEEE1284_DATA);
ret = write(pp_dev_fd, buf, sz);
if (ret < 0)
return 0;
return ret;
}
unsigned parport_dev_ecp_write_addr(const void *buf, unsigned sz)
{
ssize_t ret;
setmode(IEEE1284_MODE_ECP | IEEE1284_ADDR);
ret = write(pp_dev_fd, buf, sz);
if (ret < 0)
return 0;
return ret;
}
unsigned parport_dev_ecp_read_data(void *buf, unsigned sz)
{
ssize_t ret;
setmode(IEEE1284_MODE_ECP | IEEE1284_DATA);
ret = read(pp_dev_fd, buf, sz);
if (ret < 0)
return 0;
return ret;
}
/* ---------------------------------------------------------------------- */
unsigned parport_dev_fpgaconfig_write(const void *buf, unsigned sz)
{
#if 1
const unsigned char *bp = buf;
unsigned u;
for (u = 0; u < sz; u++, bp++)
parport_dev_write_data(*bp);
return sz;
#else
ssize_t ret;
setmode(IEEE1284_MODE_COMPAT);
ret = write(pp_dev_fd, buf, sz);
if (ret < 0)
return 0;
return ret;
#endif
}
/* ---------------------------------------------------------------------- */
const struct parport_ops parport_dev_ops = {
parport_dev_read_data,
parport_dev_write_data,
parport_dev_read_status,
parport_dev_read_control,
parport_dev_write_control,
parport_dev_frob_control,
parport_dev_epp_write_data,
parport_dev_epp_read_data,
parport_dev_epp_write_addr,
parport_dev_epp_read_addr,
parport_dev_ecp_write_data,
parport_dev_ecp_read_data,
parport_dev_ecp_write_addr,
parport_dev_fpgaconfig_write
};
/* ---------------------------------------------------------------------- */
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