/*
* libieee1284 - IEEE 1284 library
* Copyright (C) 2001, 2002, 2003 Tim Waugh <twaugh@redhat.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
*/
#include "ieee1284.h"
#include "debug.h"
#include "detect.h"
/* ieee1284_open is in state.c */
static const char *needs_open_port = \
"%s called for port that wasn't opened (use ieee1284_open first)\n";
static const char *needs_claimed_port = \
"%s called for port that wasn't claimed (use ieee1284_claim first)\n";
int
ieee1284_ref (struct parport *port)
{
struct parport_internal *priv = port->priv;
return ++priv->ref;
}
int
ieee1284_unref (struct parport *port)
{
struct parport_internal *priv = port->priv;
if (priv->opened && priv->ref == 1)
{
int ret;
debugprintf ("ieee1284_unref called for last reference to open port!\n");
ret = ieee1284_close (port);
if (ret == E1284_OK)
return 0;
return 1;
}
return deref_port (port);
}
int
ieee1284_close (struct parport *port)
{
struct parport_internal *priv = port->priv;
if (!priv->opened)
{
debugprintf (needs_open_port, "ieee1284_close");
return E1284_INVALIDPORT;
}
if (priv->fn->cleanup)
priv->fn->cleanup (priv);
priv->opened = 0;
deref_port (port);
return E1284_OK;
}
int
ieee1284_claim (struct parport *port)
{
int ret = E1284_OK;
struct parport_internal *priv = port->priv;
if (!priv->opened)
{
debugprintf (needs_open_port, "ieee1284_claim");
return E1284_INVALIDPORT;
}
if (priv->claimed)
{
debugprintf ("ieee1284_claim called for a port already claimed\n");
return E1284_INVALIDPORT;
}
if (priv->fn->claim)
ret = priv->fn->claim (priv);
if (ret == E1284_OK)
priv->claimed = 1;
return ret;
}
int
ieee1284_get_irq_fd (struct parport *port)
{
int ret = E1284_NOTAVAIL;
struct parport_internal *priv = port->priv;
if (!priv->opened)
{
debugprintf (needs_open_port, "ieee1284_get_irq_fd");
return E1284_INVALIDPORT;
}
if (priv->fn->get_irq_fd)
ret = priv->fn->get_irq_fd (priv);
return ret;
}
int
ieee1284_clear_irq (struct parport *port, unsigned int *count)
{
int ret = E1284_NOTAVAIL;
struct parport_internal *priv = port->priv;
if (priv->fn->clear_irq)
{
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_clear_irq");
return E1284_INVALIDPORT;
}
ret = priv->fn->clear_irq (priv, count);
}
return ret;
}
void
ieee1284_release (struct parport *port)
{
struct parport_internal *priv = port->priv;
if (priv->claimed && priv->fn->release)
priv->fn->release (priv);
priv->claimed = 0;
}
int
ieee1284_read_data (struct parport *port)
{
int ret = -E1284_NOTAVAIL;
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_read_data");
return E1284_INVALIDPORT;
}
if (priv->fn->read_data)
ret = priv->fn->read_data (priv);
return ret;
}
void
ieee1284_write_data (struct parport *port, unsigned char st)
{
struct parport_internal *priv = port->priv;
if (priv->claimed)
priv->fn->write_data (priv, st);
else
debugprintf (needs_claimed_port, "ieee1284_write_data");
}
int
ieee1284_wait_data (struct parport *port,
unsigned char mask,
unsigned char val,
struct timeval *timeout)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_wait_data");
return E1284_INVALIDPORT;
}
return priv->fn->wait_data (priv, mask, val, timeout);
}
int
ieee1284_data_dir (struct parport *port, int reverse)
{
int ret = E1284_NOTAVAIL;
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_data_dir");
return E1284_INVALIDPORT;
}
if (priv->fn->data_dir)
ret = priv->fn->data_dir (priv, reverse);
return ret;
}
int
ieee1284_read_status (struct parport *port)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_read_status");
return E1284_INVALIDPORT;
}
return priv->fn->read_status (priv);
}
int
ieee1284_wait_status (struct parport *port,
unsigned char mask,
unsigned char val,
struct timeval *timeout)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_wait_status");
return E1284_INVALIDPORT;
}
return priv->fn->wait_status (priv, mask, val, timeout);
}
int
ieee1284_read_control (struct parport *port)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_read_control");
return E1284_INVALIDPORT;
}
return priv->fn->read_control (priv);
}
void
ieee1284_write_control (struct parport *port, unsigned char ct)
{
struct parport_internal *priv = port->priv;
if (priv->claimed)
priv->fn->write_control (priv, ct);
else
debugprintf (needs_claimed_port, "ieee1284_write_control");
}
void
ieee1284_frob_control (struct parport *port, unsigned char mask,
unsigned char val)
{
struct parport_internal *priv = port->priv;
if (priv->claimed)
priv->fn->frob_control (priv, mask, val);
else
debugprintf (needs_claimed_port, "ieee1284_frob_control");
}
int
ieee1284_do_nack_handshake (struct parport *port,
unsigned char ct_before,
unsigned char ct_after,
struct timeval *timeout)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_do_nack_handshake");
return E1284_INVALIDPORT;
}
return priv->fn->do_nack_handshake (priv, ct_before, ct_after, timeout);
}
int
ieee1284_negotiate (struct parport *port, int mode)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_negotiate");
return E1284_INVALIDPORT;
}
return priv->fn->negotiate (priv, mode);
}
void
ieee1284_terminate (struct parport *port)
{
struct parport_internal *priv = port->priv;
if (priv->claimed)
priv->fn->terminate (priv);
else
debugprintf (needs_claimed_port, "ieee1284_terminate");
}
int
ieee1284_ecp_fwd_to_rev (struct parport *port)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_ecp_fwd_to_rev");
return E1284_INVALIDPORT;
}
return priv->fn->ecp_fwd_to_rev (priv);
}
int
ieee1284_ecp_rev_to_fwd (struct parport *port)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_ecp_rev_to_fwd");
return E1284_INVALIDPORT;
}
return priv->fn->ecp_rev_to_fwd (priv);
}
ssize_t
ieee1284_nibble_read (struct parport *port, int flags,
char *buffer, size_t len)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_nibble_read");
return E1284_INVALIDPORT;
}
return priv->fn->nibble_read (priv, flags, buffer, len);
}
ssize_t
ieee1284_compat_write (struct parport *port, int flags,
const char *buffer, size_t len)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_compat_write");
return E1284_INVALIDPORT;
}
return priv->fn->compat_write (priv, flags, buffer, len);
}
ssize_t
ieee1284_byte_read (struct parport *port, int flags,
char *buffer, size_t len)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_byte_read");
return E1284_INVALIDPORT;
}
return priv->fn->byte_read (priv, flags, buffer, len);
}
ssize_t
ieee1284_epp_read_data (struct parport *port, int flags, char *buffer,
size_t len)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_epp_read_data");
return E1284_INVALIDPORT;
}
return priv->fn->epp_read_data (priv, flags, buffer, len);
}
ssize_t
ieee1284_epp_write_data (struct parport *port, int flags,
const char *buffer, size_t len)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_epp_write_data");
return E1284_INVALIDPORT;
}
return priv->fn->epp_write_data (priv, flags, buffer, len);
}
ssize_t
ieee1284_epp_read_addr (struct parport *port, int flags, char *buffer,
size_t len)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_epp_read_addr");
return E1284_INVALIDPORT;
}
return priv->fn->epp_read_addr (priv, flags, buffer, len);
}
ssize_t
ieee1284_epp_write_addr (struct parport *port, int flags,
const char *buffer, size_t len)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_epp_write_addr");
return E1284_INVALIDPORT;
}
return priv->fn->epp_write_addr (priv, flags, buffer, len);
}
ssize_t
ieee1284_ecp_read_data (struct parport *port, int flags, char *buffer,
size_t len)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_ecp_read_data");
return E1284_INVALIDPORT;
}
return priv->fn->ecp_read_data (priv, flags, buffer, len);
}
ssize_t
ieee1284_ecp_write_data (struct parport *port, int flags,
const char *buffer, size_t len)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_ecp_write_data");
return E1284_INVALIDPORT;
}
return priv->fn->ecp_write_data (priv, flags, buffer, len);
}
ssize_t
ieee1284_ecp_read_addr (struct parport *port, int flags,
char *buffer, size_t len)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_ecp_read_addr");
return E1284_INVALIDPORT;
}
return priv->fn->ecp_read_addr (priv, flags, buffer, len);
}
ssize_t
ieee1284_ecp_write_addr (struct parport *port, int flags,
const char *buffer, size_t len)
{
struct parport_internal *priv = port->priv;
if (!priv->claimed)
{
debugprintf (needs_claimed_port, "ieee1284_ecp_write_addr");
return E1284_INVALIDPORT;
}
return priv->fn->ecp_write_addr (priv, flags, buffer, len);
}
struct timeval *
ieee1284_set_timeout (struct parport *port, struct timeval *timeout)
{
struct parport_internal *priv = port->priv;
return priv->fn->set_timeout (priv, timeout);
}
/*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/