sane-project-backends/sanei/sanei_pp.c

1464 wiersze
32 KiB
C

/* sane - Scanner Access Now Easy.
* Copyright (C) 2003-2005 Gerhard Jaeger <gerhard@gjaeger.de>
* based on work done by Jochen Eisinger <jochen.eisinger@gmx.net>
* also parts from libieee1284 by Tim Waugh <tim@cyberelk.net>
* This file is part of the SANE package.
*
* 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.
*
* As a special exception, the authors of SANE give permission for
* additional uses of the libraries contained in this release of SANE.
*
* The exception is that, if you link a SANE library with other files
* to produce an executable, this does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. Your use of that executable is in no way restricted on
* account of linking the SANE library code into it.
*
* This exception does not, however, invalidate any other reasons why
* the executable file might be covered by the GNU General Public
* License.
*
* If you submit changes to SANE to the maintainers to be included in
* a subsequent release, you agree by submitting the changes that
* those changes may be distributed with this exception intact.
*
* If you write modifications of your own for SANE, it is your choice
* whether to permit this exception to apply to your modifications.
* If you do not wish that, delete this exception notice.
*
* This file implements an interface for accessing the parallelport
*/
/* debug levels:
* 0 - nothing
* 1 - errors
* 2 - warnings
* 3 - things nice to know
* 4 - code flow
* 5 - detailed flow
* 6 - everything
*
* These debug levels can be set using the environment variable
* SANE_DEBUG_SANEI_PP
*/
#include "../include/sane/config.h"
#define BACKEND_NAME sanei_pp
#define _TEST_LOOPS 1000
#define _MAX_PORTS 20
#ifndef _VAR_NOT_USED
# define _VAR_NOT_USED(x) ((x)=(x))
#endif
/* uncomment this to have some parameter checks on in/out functions,
* note: that this will slow down the calls
*/
#if 0
# define _PARANOIA
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_SYS_TIME_H
# include <sys/time.h>
#endif
#ifdef HAVE_LIMITS_H
# include <limits.h>
#else
# ifndef ULONG_MAX
# define ULONG_MAX 4294967295UL
# endif
#endif
#if defined (ENABLE_PARPORT_DIRECTIO)
# undef HAVE_LIBIEEE1284
# if defined(HAVE_SYS_IO_H)
# if defined (__ICC) && __ICC >= 700
# define __GNUC__ 2
# endif
# include <sys/io.h>
# ifndef SANE_HAVE_SYS_IO_H_WITH_INB_OUTB
# define IO_SUPPORT_MISSING
# endif
# if defined (__ICC) && __ICC >= 700
# undef __GNUC__
# elif defined(__ICC) && defined(HAVE_ASM_IO_H)
# include <asm/io.h>
# endif
# elif defined(HAVE_ASM_IO_H)
# include <asm/io.h>
# elif defined(HAVE_SYS_HW_H)
# include <sys/hw.h>
# elif defined(__i386__) && ( defined (__GNUC__) || defined (__ICC) )
static __inline__ void
outb( u_char value, u_long port )
{
__asm__ __volatile__ ("outb %0,%1"::"a" (value), "d" ((u_short) port));
}
static __inline__ u_char
inb( u_long port )
{
u_char value;
__asm__ __volatile__ ("inb %1,%0":"=a" (value):"d" ((u_short) port));
return value;
}
# endif
#elif defined(HAVE_LIBIEEE1284)
# include <ieee1284.h>
#else
# pragma message "No I/O support for this architecture!"
# define IO_SUPPORT_MISSING
#endif
#include "../include/sane/sane.h"
#include "../include/sane/sanei.h"
#include "../include/sane/sanei_debug.h"
#include "../include/sane/sanei_pp.h"
#if defined(STDC_HEADERS)
# include <errno.h>
# include <stdio.h>
# include <stdlib.h>
#endif
#if defined(HAVE_STRING_H)
# include <string.h>
#elif defined(HAVE_STRINGS_H)
# include <strings.h>
#endif
#if defined(HAVE_SYS_TYPES_H)
# include <sys/types.h>
#endif
/** our global init flag... */
static int first_time = SANE_TRUE;
static unsigned long pp_thresh = 0;
#if (defined (HAVE_IOPERM) || defined (HAVE_LIBIEEE1284)) && !defined (IO_SUPPORT_MISSING)
typedef struct {
#ifndef HAVE_LIBIEEE1284
const char name[6];
u_long base; /**< i/o base address */
u_char ctrl; /**< for restoring CTRL register */
u_char ecp_ctrl; /**< for restoring ECP-CTRL register */
#endif
u_int in_use; /**< port in use? */
u_int claimed; /**< port claimed? */
int caps; /**< port capabilities */
} PortRec, *Port;
#if defined (HAVE_LIBIEEE1284)
static struct parport_list pplist;
static PortRec port[_MAX_PORTS];
#else
/** redefine the CAPability flags */
enum ieee1284_capabilities
{
CAP1284_RAW = (1<<0),
CAP1284_NIBBLE = (1<<1), /* SPP mode */
CAP1284_BYTE = (1<<2), /* PS/2 bidirectional */
CAP1284_COMPAT = (1<<3),
CAP1284_BECP = (1<<4),
CAP1284_ECP = (1<<5), /* ECP */
CAP1284_ECPRLE = (1<<6), /* ECP with RLE support */
CAP1284_ECPSWE = (1<<7),
CAP1284_EPP = (1<<8), /* EPP hardware support */
CAP1284_EPPSL = (1<<9), /* EPP 1.7 */
CAP1284_EPPSWE = (1<<10) /* EPP software support */
};
static PortRec port[] = {
{ "0x378", 0x378, 0, 0, SANE_FALSE, SANE_FALSE, 0 },
{ "0x278", 0x278, 0, 0, SANE_FALSE, SANE_FALSE, 0 },
{ "0x3BC", 0x3BC, 0, 0, SANE_FALSE, SANE_FALSE, 0 }
};
#endif
/** depending on the interface we use, define the port macros
*/
#if defined(HAVE_LIBIEEE1284)
#define inb_data(fd) ieee1284_read_data(pplist.portv[fd]);
#define inb_stat(fd) (ieee1284_read_status(pplist.portv[fd]) ^ S1284_INVERTED)
#define inb_ctrl(fd) (ieee1284_read_control(pplist.portv[fd]) ^ C1284_INVERTED)
static inline u_char inb_eppdata(int fd)
{
u_char val;
ieee1284_epp_read_data(pplist.portv[fd], 0, (char *)&val, 1);
return val;
}
static inline void outb_eppdata(int fd, u_char val)
{
ieee1284_epp_write_data(pplist.portv[fd], 0, (const char *)&val, 1);
}
#define outb_data(fd,val) ieee1284_write_data(pplist.portv[fd], val)
#define outb_ctrl(fd,val) ieee1284_write_control(pplist.portv[fd], \
(val) ^ C1284_INVERTED)
static inline void outb_addr(int fd, u_char val)
{
ieee1284_epp_write_addr (pplist.portv[fd], 0, (char *)&val, 1);
}
#else
#define inb_data(fd) inb(port[fd].base)
#define inb_stat(fd) inb(port[fd].base + 1)
#define inb_ctrl(fd) inb(port[fd].base + 2)
#define inb_eppdata(fd) inb(port[fd].base + 4)
#define outb_data(fd,val) outb(val, port[fd].base)
#define outb_stat(fd,val) outb(val, port[fd].base + 1)
#define outb_ctrl(fd,val) outb(val, port[fd].base + 2)
#define outb_addr(fd,val) outb(val, port[fd].base + 3)
#define outb_eppdata(fd,val) outb(val, port[fd].base + 4)
#ifdef HAVE_IOPL
# define _SET_IOPL() iopl(3)
# define inbyte400(fd) inb(port[fd].base + 0x400)
# define inbyte402(fd) inb(port[fd].base + 0x402)
# define outbyte400(fd,val) outb(val, port[fd].base + 0x400)
# define outbyte402(fd,val) outb(val, port[fd].base + 0x402)
#else
# define _SET_IOPL()
# define inbyte400(fd)
# define inbyte402(fd,val)
# define outbyte400(fd,val)
# define outbyte402(fd,val)
#endif
#endif
/* should also be in unistd.h */
extern int setuid (uid_t);
#if defined (HAVE_LIBIEEE1284)
static const char *pp_libieee1284_errorstr( int error )
{
switch (error) {
case E1284_OK:
return "Everything went fine";
case E1284_NOTIMPL:
return "Not implemented in libieee1284";
case E1284_NOTAVAIL:
return "Not available on this system";
case E1284_TIMEDOUT:
return "Operation timed out";
case E1284_REJECTED:
return "IEEE 1284 negotiation rejected";
case E1284_NEGFAILED:
return "Negotiation went wrong";
case E1284_NOMEM:
return "No memory left";
case E1284_INIT:
return "Error initializing port";
case E1284_SYS:
return "Error interfacing system";
case E1284_NOID:
return "No IEEE 1284 ID available";
case E1284_INVALIDPORT:
return "Invalid port";
default:
return "Unknown error";
}
}
#endif
/** show the caps
*/
static int
pp_showcaps( int caps )
{
int mode = 0;
char ct[1024];
ct[0] = '\0';
if( caps & CAP1284_NIBBLE ) {
strcat( ct, "SPP " );
mode |= SANEI_PP_MODE_SPP;
}
if( caps & CAP1284_BYTE ) {
strcat( ct, "PS/2 " );
mode |= SANEI_PP_MODE_BIDI;
}
if( caps & CAP1284_EPP ) {
strcat( ct, "EPP " );
mode |= SANEI_PP_MODE_EPP;
}
if( caps & CAP1284_EPPSWE ) {
strcat( ct, "EPPSWE " );
mode |= SANEI_PP_MODE_EPP;
}
if( caps & CAP1284_ECP ) {
strcat( ct, "ECP " );
mode |= SANEI_PP_MODE_ECP;
}
if( caps & CAP1284_ECPRLE ) {
strcat( ct, "ECPRLE " );
mode |= SANEI_PP_MODE_ECP;
}
DBG( 4, "Supported Modes: %s\n", ct );
return mode;
}
#ifndef HAVE_LIBIEEE1284
/** probe the parallel port
*/
static int
pp_probe( int fd )
{
#ifdef HAVE_IOPL
SANE_Byte c;
int i, j;
#endif
SANE_Byte a, b;
int retv = 0;
DBG( 4, "pp_probe: port 0x%04lx\n", port[fd].base );
/* SPP check */
outbyte402( fd, 0x0c );
outb_ctrl ( fd, 0x0c );
outb_data ( fd, 0x55 );
a = inb_data( fd );
if( a != 0x55 ) {
DBG( 4, "pp_probe: nothing supported :-(\n" );
return retv;
}
DBG( 4, "pp_probe: SPP port present\n" );
retv += CAP1284_NIBBLE;
/* check for ECP */
#ifdef HAVE_IOPL
/* clear at most 1k of data from FIFO */
for( i = 1024; i > 0; i-- ) {
a = inbyte402( fd );
if ((a & 0x03) == 0x03)
goto no_ecp;
if (a & 0x01)
break;
inbyte400( fd ); /* Remove byte from FIFO */
}
if (i <= 0)
goto no_ecp;
b = a ^ 3;
outbyte402( fd, b );
c = inbyte402( fd );
if (a == c) {
outbyte402( fd, 0xc0 ); /* FIFO test */
j = 0;
while (!(inbyte402( fd ) & 0x01) && (j < 1024)) {
inbyte402( fd );
j++;
}
if (j >= 1024)
goto no_ecp;
i = 0;
j = 0;
while (!(inbyte402( fd ) & 0x02) && (j < 1024)) {
outbyte400( fd, 0x00 );
i++;
j++;
}
if (j >= 1024)
goto no_ecp;
j = 0;
while (!(inbyte402( fd ) & 0x01) && (j < 1024)) {
inbyte400( fd );
j++;
}
if (j >= 1024)
goto no_ecp;
DBG( 4, "pp_probe: ECP with a %i byte FIFO present\n", i );
retv += CAP1284_ECP;
}
no_ecp:
#endif
/* check for PS/2 compatible port */
if( retv & CAP1284_ECP ) {
outbyte402( fd, 0x20 );
}
outb_data( fd, 0x55 );
outb_ctrl( fd, 0x0c );
a = inb_data( fd );
outb_data( fd, 0x55 );
outb_ctrl( fd, 0x2c );
b = inb_data( fd );
if( a != b ) {
DBG( 4, "pp_probe: PS/2 bidirectional port present\n");
retv += CAP1284_BYTE;
}
/* check for EPP support */
if( port[fd].base & 0x007 ) {
DBG( 4, "pp_probe: EPP not supported at this address\n" );
return retv;
}
#ifdef HAVE_IOPL
if( retv & CAP1284_ECP ) {
for( i = 0x00; i < 0x80; i += 0x20 ) {
outbyte402( fd, i );
a = inb_stat( fd );
outb_stat( fd, a );
outb_stat( fd, (a & 0xfe));
a = inb_stat( fd );
if (!(a & 0x01)) {
DBG( 2, "pp_probe: "
"Failed Intel bug check. (Phony EPP in ECP)\n" );
return retv;
}
}
DBG( 4, "pp_probe: Passed Intel bug check.\n" );
outbyte402( fd, 0x80 );
}
#endif
a = inb_stat( fd );
outb_stat( fd, a );
outb_stat( fd, (a & 0xfe));
a = inb_stat( fd );
if (a & 0x01) {
outbyte402( fd, 0x0c );
outb_ctrl ( fd, 0x0c );
return retv;
}
outb_ctrl( fd, 0x04 );
inb_eppdata ( fd );
a = inb_stat( fd );
outb_stat( fd, a );
outb_stat( fd, (a & 0xfe));
if( a & 0x01 ) {
DBG( 4, "pp_probe: EPP 1.9 with hardware direction protocol\n");
retv += CAP1284_EPP;
} else {
/* The EPP timeout bit was not set, this could either be:
* EPP 1.7
* EPP 1.9 with software direction
*/
outb_ctrl( fd, 0x24 );
inb_eppdata ( fd );
a = inb_stat( fd );
outb_stat( fd, a );
outb_stat( fd, (a & 0xfe));
if( a & 0x01 ) {
DBG( 4, "pp_probe: EPP 1.9 with software direction protocol\n" );
retv += CAP1284_EPPSWE;
} else {
DBG( 4, "pp_probe: EPP 1.7\n" );
retv += CAP1284_EPPSL;
}
}
outbyte402( fd, 0x0c );
outb_ctrl ( fd, 0x0c );
return retv;
}
/**
*/
static int pp_set_scpmode( int fd )
{
SANE_Byte tmp;
DBG( 4, "pp_set_scpmode\n" );
#ifdef HAVE_IOPL
tmp = inbyte402( fd );
tmp &= 0x1f;
outbyte402( fd, tmp );
#endif
tmp = inb_ctrl( fd );
tmp &= 0x0f;
outb_ctrl ( fd, tmp );
return SANE_STATUS_GOOD;
}
static int pp_set_bidimode( int fd )
{
SANE_Byte tmp;
DBG( 4, "pp_set_bidimode\n" );
#ifdef HAVE_IOPL
tmp = inbyte402( fd );
tmp = (tmp & 0x1f) | 0x20;
outbyte402( fd, tmp );
#endif
tmp = inb_ctrl( fd );
tmp = (tmp & 0x0f) | 0x20;
outb_ctrl ( fd, tmp );
return SANE_STATUS_GOOD;
}
static int pp_set_eppmode( int fd )
{
SANE_Byte tmp;
DBG( 4, "pp_set_eppmode\n" );
#ifdef HAVE_IOPL
tmp = inbyte402( fd );
tmp = (tmp & 0x1f) | 0x80;
outbyte402( fd, tmp );
#endif
tmp = inb_ctrl( fd );
tmp = (tmp & 0xf0) | 0x40;
outb_ctrl ( fd, tmp );
return SANE_STATUS_GOOD;
}
static int pp_set_ecpmode( int fd )
{
#ifdef HAVE_IOPL
SANE_Byte tmp;
#endif
DBG( 4, "pp_set_ecpmode\n" );
#ifdef HAVE_IOPL
tmp = inbyte402( fd );
tmp = (tmp & 0x1f) | 0x60;
outbyte402( fd, tmp );
return SANE_STATUS_GOOD;
#endif
return SANE_STATUS_UNSUPPORTED;
}
/** set the parallel port mode
*/
static int
pp_setmode( int fd, int mode )
{
int ret;
if( 0 == (mode & port[fd].caps)) {
DBG( 2, "pp_setmode: mode not supported %d\n", mode );
return SANE_STATUS_UNSUPPORTED;
}
switch( mode ) {
case SANEI_PP_MODE_SPP: ret = pp_set_scpmode( fd ); break;
case SANEI_PP_MODE_BIDI: ret = pp_set_bidimode( fd ); break;
case SANEI_PP_MODE_EPP: ret = pp_set_eppmode( fd ); break;
case SANEI_PP_MODE_ECP: ret = pp_set_ecpmode( fd ); break;
default:
DBG( 2, "pp_setmode: invalid mode %d\n", mode );
return SANE_STATUS_INVAL;
}
return ret;
}
#endif
static unsigned long
pp_time_diff( struct timeval *start, struct timeval *end )
{
double s, e, r;
s = (double)start->tv_sec * 1000000.0 + (double)start->tv_usec;
e = (double)end->tv_sec * 1000000.0 + (double)end->tv_usec;
if( e > s )
r = (e - s);
else
r = (s - e);
if( r <= (double)ULONG_MAX )
return (unsigned long)r;
return 0;
}
/**
*/
static unsigned long
pp_calculate_thresh( void )
{
unsigned long i, r, ret;
struct timeval start, end, deadline;
gettimeofday( &start, NULL);
for( i = _TEST_LOOPS; i; i-- ) {
gettimeofday( &deadline, NULL );
deadline.tv_usec += 10;
deadline.tv_sec += deadline.tv_usec / 1000000;
deadline.tv_usec %= 1000000;
}
gettimeofday( &end, NULL);
r = pp_time_diff( &start, &end );
ret = r/_TEST_LOOPS;
return ret;
}
/**
*/
static void
pp_calibrate_delay( void )
{
unsigned long r, i;
struct timeval start, end;
for( i = 0; i < 5; i++ ) {
pp_thresh = pp_calculate_thresh();
gettimeofday( &start, NULL);
for( i = _TEST_LOOPS; i; i-- ) {
sanei_pp_udelay( 1 );
}
gettimeofday( &end, NULL);
r = pp_time_diff( &start, &end );
DBG( 4, "pp_calibrate_delay: Delay expected: "
"%u, real %lu, pp_thresh=%lu\n", _TEST_LOOPS, r, pp_thresh );
if( r >= _TEST_LOOPS ) {
return;
}
}
DBG( 4, "pp_calibrate_delay: pp_thresh set to 0\n" );
pp_thresh = 0;
}
static SANE_Status
pp_init( void )
{
#if defined (HAVE_LIBIEEE1284)
int result, i;
#endif
if( first_time == SANE_FALSE ) {
DBG( 5, "pp_init: already initialized\n" );
return SANE_STATUS_GOOD;
}
DBG( 5, "pp_init: called for the first time\n");
first_time = SANE_FALSE;
#if defined (HAVE_LIBIEEE1284)
DBG( 4, "pp_init: initializing libieee1284\n");
result = ieee1284_find_ports( &pplist, 0 );
if (result) {
DBG (1, "pp_init: initializing IEEE 1284 failed (%s)\n",
pp_libieee1284_errorstr( result ));
first_time = SANE_TRUE;
return SANE_STATUS_INVAL;
}
DBG( 3, "pp_init: %d ports reported by IEEE 1284 library\n", pplist.portc);
for( i = 0; i < pplist.portc; i++ )
DBG( 6, "pp_init: port %d is `%s`\n", i, pplist.portv[i]->name);
/* we support only up to _MAX_PORTS... */
if( pplist.portc > _MAX_PORTS ) {
DBG (1, "pp_init: Lib IEEE 1284 reports too much ports: %d\n",
pplist.portc );
ieee1284_free_ports( &pplist );
first_time = SANE_TRUE;
return SANE_STATUS_UNSUPPORTED;
}
memset( port, 0, sizeof(port));
#else
DBG( 4, "pp_init: trying to setuid root\n");
if( 0 > setuid( 0 )) {
DBG( 1, "pp_init: setuid failed: errno = %d\n", errno );
DBG( 5, "pp_init: returning SANE_STATUS_INVAL\n" );
first_time = SANE_TRUE;
return SANE_STATUS_INVAL;
}
DBG( 3, "pp_init: the application is now root\n" );
#endif
DBG( 5, "pp_init: initialized successfully\n" );
return SANE_STATUS_GOOD;
}
static int
pp_open( const char *dev, SANE_Status * status )
{
int i;
#if !defined (HAVE_LIBIEEE1284)
u_long base;
#else
int result;
#endif
DBG( 4, "pp_open: trying to attach dev `%s`\n", dev );
#if !defined (HAVE_LIBIEEE1284)
{
char *end;
DBG( 5, "pp_open: reading port number\n" );
base = strtol( dev, &end, 0 );
if ((end == dev) || (*end != '\0')) {
DBG( 1, "pp_open: `%s` is not a valid port number\n", dev);
DBG( 6, "pp_open: the part I did not understand was ...`%s`\n", end);
*status = SANE_STATUS_INVAL;
return -1;
}
}
DBG( 6, "pp_open: read port number 0x%03lx\n", base );
if( base == 0 ) {
DBG( 1, "pp_open: 0x%03lx is not a valid base address\n", base );
*status = SANE_STATUS_INVAL;
return -1;
}
#endif
DBG( 5, "pp_open: looking up port in list\n" );
#if defined (HAVE_LIBIEEE1284)
for( i = 0; i < pplist.portc; i++ ) {
DBG( 5, "pp_open: checking >%s<\n", pplist.portv[i]->name );
if( !strcmp(pplist.portv[i]->name, dev))
break;
}
if( pplist.portc <= i ) {
DBG( 1, "pp_open: `%s` is not a valid device name\n", dev );
*status = SANE_STATUS_INVAL;
return -1;
}
#else
for( i = 0; i < NELEMS(port); i++ ) {
if( port[i].base == base )
break;
}
if (NELEMS (port) <= i) {
DBG( 1, "pp_open: 0x%03lx is not a valid base address\n", base );
*status = SANE_STATUS_INVAL;
return -1;
}
#endif
DBG( 6, "pp_open: port is in list at port[%d]\n", i);
if( port[i].in_use == SANE_TRUE) {
#if defined (HAVE_LIBIEEE1284)
DBG( 1, "pp_open: device `%s` is already in use\n", dev );
#else
DBG( 1, "pp_open: port 0x%03lx is already in use\n", base );
#endif
*status = SANE_STATUS_DEVICE_BUSY;
return -1;
}
port[i].in_use = SANE_TRUE;
port[i].claimed = SANE_FALSE;
#if defined (HAVE_LIBIEEE1284)
DBG( 5, "pp_open: opening device\n" );
result = ieee1284_open( pplist.portv[i], 0, &port[i].caps );
if (result) {
DBG( 1, "pp_open: could not open device `%s` (%s)\n",
dev, pp_libieee1284_errorstr (result));
port[i].in_use = SANE_FALSE;
*status = SANE_STATUS_ACCESS_DENIED;
return -1;
}
#else
DBG( 5, "pp_open: getting io permissions\n" );
/* TODO: insert FreeBSD compatible code here */
if( ioperm( port[i].base, 5, 1 )) {
DBG( 1, "pp_open: cannot get io privilege for port 0x%03lx\n",
port[i].base);
port[i].in_use = SANE_FALSE;
*status = SANE_STATUS_IO_ERROR;
return -1;
}
/* save the CTRL register settings */
#ifdef HAVE_IOPL
_SET_IOPL();
port[i].ecp_ctrl = inbyte402(i);
port[i].ctrl = inb_ctrl(i);
#endif
/* check the capabilities of this port */
port[i].caps = pp_probe( i );
#endif
port[i].caps = pp_showcaps( port[i].caps );
DBG( 3, "pp_open: device `%s` opened...\n", dev );
*status = SANE_STATUS_GOOD;
return i;
}
static int
pp_close( int fd, SANE_Status *status )
{
#if defined(HAVE_LIBIEEE1284)
int result;
#endif
DBG( 4, "pp_close: fd=%d\n", fd );
#if defined(HAVE_LIBIEEE1284)
DBG( 6, "pp_close: this is port '%s'\n", pplist.portv[fd]->name );
#else
DBG( 6, "pp_close: this is port 0x%03lx\n", port[fd].base );
DBG( 6, "pp_close: restoring the CTRL registers\n" );
outb_ctrl( fd, port[fd].ctrl );
#ifdef HAVE_IOPL
outbyte402( fd, port[fd].ecp_ctrl );
#endif
#endif
if( port[fd].claimed == SANE_TRUE ) {
sanei_pp_release( fd );
}
DBG( 5, "pp_close: trying to free io port\n" );
#if defined(HAVE_LIBIEEE1284)
if((result = ieee1284_close(pplist.portv[fd])) < 0) {
#else
if( ioperm( port[fd].base, 5, 0 )) {
#endif
#if defined(HAVE_LIBIEEE1284)
DBG( 1, "pp_close: can't free port '%s' (%s)\n",
pplist.portv[fd]->name, pp_libieee1284_errorstr(result));
#else
DBG( 1, "pp_close: can't free port 0x%03lx\n", port[fd].base );
#endif
*status = SANE_STATUS_IO_ERROR;
return -1;
}
DBG( 5, "pp_close: marking port as unused\n" );
port[fd].in_use = SANE_FALSE;
*status = SANE_STATUS_GOOD;
return 0;
}
/** exported functions **/
SANE_Status
sanei_pp_init( void )
{
SANE_Status result;
DBG_INIT();
result = pp_init();
if( result != SANE_STATUS_GOOD ) {
return result;
}
pp_calibrate_delay();
return SANE_STATUS_GOOD;
}
SANE_Status
sanei_pp_open( const char *dev, int *fd )
{
SANE_Status status;
DBG( 4, "sanei_pp_open: called for device '%s'\n", dev);
*fd = pp_open( dev, &status );
if( *fd == -1 ) {
DBG( 5, "sanei_pp_open: connection failed\n" );
return status;
}
DBG( 6, "sanei_pp_open: connected to device using fd %u\n", *fd );
return SANE_STATUS_GOOD;
}
void
sanei_pp_close( int fd )
{
SANE_Status status;
DBG( 4, "sanei_pp_close: fd = %d\n", fd );
#if defined(HAVE_LIBIEEE1284)
if((fd < 0) || (fd >= pplist.portc)) {
#else
if((fd < 0) || (fd >= NELEMS (port))) {
#endif
DBG( 2, "sanei_pp_close: fd %d is invalid\n", fd );
return;
}
if( port[fd].in_use == SANE_FALSE ) {
DBG( 2, "sanei_pp_close: port is not in use\n" );
#if defined(HAVE_LIBIEEE1284)
DBG( 6, "sanei_pp_close: port is '%s'\n", pplist.portv[fd]->name );
#else
DBG( 6, "sanei_pp_close: port is 0x%03lx\n", port[fd].base );
#endif
return;
}
DBG( 5, "sanei_pp_close: freeing resources\n" );
if( pp_close (fd, &status) == -1 ) {
DBG( 5, "sanei_pp_close: failed\n" );
return;
}
DBG( 5, "sanei_pp_close: finished\n" );
}
SANE_Status
sanei_pp_claim( int fd )
{
#if defined (HAVE_LIBIEEE1284)
int result;
#endif
DBG( 4, "sanei_pp_claim: fd = %d\n", fd );
#if defined (HAVE_LIBIEEE1284)
if((fd < 0) || (fd >= pplist.portc)) {
DBG( 2, "sanei_pp_claim: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
result = ieee1284_claim (pplist.portv[fd]);
if (result) {
DBG (1, "sanei_pp_claim: failed (%s)\n",
pp_libieee1284_errorstr(result));
return -1;
}
#endif
port[fd].claimed = SANE_TRUE;
return SANE_STATUS_GOOD;
}
SANE_Status
sanei_pp_release( int fd )
{
DBG( 4, "sanei_pp_release: fd = %d\n", fd );
#if defined(HAVE_LIBIEEE1284)
if((fd < 0) || (fd >= pplist.portc)) {
DBG( 2, "sanei_pp_release: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
ieee1284_release( pplist.portv[fd] );
#endif
port[fd].claimed = SANE_FALSE;
return SANE_STATUS_GOOD;
}
SANE_Status
sanei_pp_outb_data( int fd, SANE_Byte val )
{
#ifdef _PARANOIA
DBG( 4, "sanei_pp_outb_data: called for fd %d\n", fd );
#if defined(HAVE_LIBIEEE1284)
if ((fd < 0) || (fd >= pplist.portc)) {
#else
if ((fd < 0) || (fd >= NELEMS (port))) {
#endif
DBG( 2, "sanei_pp_outb_data: invalid fd %d\n", fd );
return SANE_STATUS_INVAL;
}
#endif
outb_data( fd, val );
return SANE_STATUS_GOOD;
}
SANE_Status
sanei_pp_outb_ctrl( int fd, SANE_Byte val )
{
#ifdef _PARANOIA
DBG( 4, "sanei_pp_outb_ctrl: called for fd %d\n", fd );
#if defined(HAVE_LIBIEEE1284)
if ((fd < 0) || (fd >= pplist.portc)) {
#else
if ((fd < 0) || (fd >= NELEMS (port))) {
#endif
DBG( 2, "sanei_pp_outb_ctrl: invalid fd %d\n", fd );
return SANE_STATUS_INVAL;
}
#endif
outb_ctrl( fd, val );
return SANE_STATUS_GOOD;
}
SANE_Status
sanei_pp_outb_addr( int fd, SANE_Byte val )
{
#ifdef _PARANOIA
DBG( 4, "sanei_pp_outb_addr: called for fd %d\n", fd );
#if defined(HAVE_LIBIEEE1284)
if ((fd < 0) || (fd >= pplist.portc)) {
#else
if ((fd < 0) || (fd >= NELEMS (port))) {
#endif
DBG( 2, "sanei_pp_outb_addr: invalid fd %d\n", fd );
return SANE_STATUS_INVAL;
}
#endif
outb_addr( fd, val );
return SANE_STATUS_GOOD;
}
SANE_Status
sanei_pp_outb_epp( int fd, SANE_Byte val )
{
#ifdef _PARANOIA
DBG( 4, "sanei_pp_outb_epp: called for fd %d\n", fd );
#if defined(HAVE_LIBIEEE1284)
if ((fd < 0) || (fd >= pplist.portc)) {
#else
if ((fd < 0) || (fd >= NELEMS (port))) {
#endif
DBG( 2, "sanei_pp_outb_epp: invalid fd %d\n", fd );
return SANE_STATUS_INVAL;
}
#endif
outb_eppdata( fd, val );
return SANE_STATUS_GOOD;
}
SANE_Byte
sanei_pp_inb_data( int fd )
{
#ifdef _PARANOIA
DBG( 4, "sanei_pp_inb_data: called for fd %d\n", fd );
#if defined(HAVE_LIBIEEE1284)
if ((fd < 0) || (fd >= pplist.portc)) {
#else
if ((fd < 0) || (fd >= NELEMS (port))) {
#endif
DBG( 2, "sanei_pp_inb_data: invalid fd %d\n", fd );
return SANE_STATUS_INVAL;
}
#endif
return inb_data( fd );
}
SANE_Byte
sanei_pp_inb_stat( int fd )
{
#ifdef _PARANOIA
DBG( 4, "sanei_pp_inb_stat: called for fd %d\n", fd );
#if defined(HAVE_LIBIEEE1284)
if ((fd < 0) || (fd >= pplist.portc)) {
#else
if ((fd < 0) || (fd >= NELEMS (port))) {
#endif
DBG( 2, "sanei_pp_outb_stat: invalid fd %d\n", fd );
return SANE_STATUS_INVAL;
}
#endif
return inb_stat( fd );
}
SANE_Byte
sanei_pp_inb_ctrl( int fd )
{
#ifdef _PARANOIA
DBG( 4, "sanei_pp_inb_ctrl: called for fd %d\n", fd );
#if defined(HAVE_LIBIEEE1284)
if ((fd < 0) || (fd >= pplist.portc)) {
#else
if ((fd < 0) || (fd >= NELEMS (port))) {
#endif
DBG( 2, "sanei_pp_inb_ctrl: invalid fd %d\n", fd );
return SANE_STATUS_INVAL;
}
#endif
return inb_ctrl( fd );
}
SANE_Byte
sanei_pp_inb_epp( int fd )
{
#ifdef _PARANOIA
DBG( 4, "sanei_pp_inb_epp: called for fd %d\n", fd );
#if defined(HAVE_LIBIEEE1284)
if ((fd < 0) || (fd >= pplist.portc)) {
#else
if ((fd < 0) || (fd >= NELEMS (port))) {
#endif
DBG( 2, "sanei_pp_inb_epp: invalid fd %d\n", fd );
return SANE_STATUS_INVAL;
}
#endif
return inb_eppdata( fd );
}
SANE_Status
sanei_pp_getmodes( int fd, int *mode )
{
#if defined(HAVE_LIBIEEE1284)
if ((fd < 0) || (fd >= pplist.portc)) {
#else
if ((fd < 0) || (fd >= NELEMS (port))) {
#endif
DBG( 2, "sanei_pp_getmodes: invalid fd %d\n", fd );
return SANE_STATUS_INVAL;
}
if( mode )
*mode = port[fd].caps;
return SANE_STATUS_GOOD;
}
SANE_Status
sanei_pp_setmode( int fd, int mode )
{
#if defined(HAVE_LIBIEEE1284)
int result;
if ((fd < 0) || (fd >= pplist.portc)) {
#else
if ((fd < 0) || (fd >= NELEMS (port))) {
#endif
DBG( 2, "sanei_pp_setmode: invalid fd %d\n", fd );
return SANE_STATUS_INVAL;
}
if((mode != SANEI_PP_MODE_SPP) && (mode != SANEI_PP_MODE_BIDI) &&
(mode != SANEI_PP_MODE_EPP) && (mode != SANEI_PP_MODE_ECP)) {
DBG( 2, "sanei_pp_setmode: invalid mode %d\n", mode );
return SANE_STATUS_INVAL;
}
#if defined(HAVE_LIBIEEE1284)
switch( mode ) {
case SANEI_PP_MODE_SPP: mode = M1284_NIBBLE; break;
case SANEI_PP_MODE_BIDI: mode = M1284_BYTE; break;
case SANEI_PP_MODE_EPP: mode = M1284_EPP; break;
case SANEI_PP_MODE_ECP: mode = M1284_ECP; break;
default:
DBG( 2, "sanei_pp_setmode: invalid mode %d\n", mode );
return SANE_STATUS_INVAL;
}
result = ieee1284_negotiate( pplist.portv[fd], mode );
/* negotiation might fails, but the port-mode should be set... */
if((E1284_OK != result) && (E1284_NEGFAILED != result)) {
DBG( 2, "sanei_pp_setmode failed: %s\n",
pp_libieee1284_errorstr( result ));
return SANE_STATUS_INVAL;
}
return SANE_STATUS_GOOD;
#else
return pp_setmode( fd, mode );
#endif
}
void
sanei_pp_udelay( unsigned long usec )
{
struct timeval now, deadline;
if( usec == 0 )
return;
gettimeofday( &deadline, NULL );
deadline.tv_usec += usec;
deadline.tv_sec += deadline.tv_usec / 1000000;
deadline.tv_usec %= 1000000;
if( usec < pp_thresh )
return;
do {
gettimeofday( &now, NULL );
} while ((now.tv_sec < deadline.tv_sec) ||
(now.tv_sec == deadline.tv_sec && now.tv_usec < deadline.tv_usec));
}
SANE_Status
sanei_pp_set_datadir( int fd, int rev )
{
#if defined(HAVE_LIBIEEE1284)
if ((fd < 0) || (fd >= pplist.portc)) {
#else
SANE_Byte tmp;
if ((fd < 0) || (fd >= NELEMS (port))) {
#endif
DBG( 2, "sanei_pp_setdir: invalid fd %d\n", fd );
return SANE_STATUS_INVAL;
}
#if defined(HAVE_LIBIEEE1284)
ieee1284_data_dir( pplist.portv[fd], rev );
#else
tmp = inb_ctrl( fd );
if( SANEI_PP_DATAIN == rev )
tmp |= SANEI_PP_CTRL_DIRECTION;
else
tmp &= ~SANEI_PP_CTRL_DIRECTION;
outb_ctrl( fd, tmp );
#endif
return SANE_STATUS_GOOD;
}
SANE_Bool
sanei_pp_uses_directio( void )
{
#if defined(HAVE_LIBIEEE1284)
return SANE_FALSE;
#else
return SANE_TRUE;
#endif
}
#else /* !HAVE_IOPERM */
SANE_Status
sanei_pp_init( void )
{
DBG_INIT();
_VAR_NOT_USED( first_time );
return SANE_STATUS_GOOD;
}
SANE_Status
sanei_pp_open( const char *dev, int *fd )
{
if (fd)
*fd = -1;
DBG( 4, "sanei_pp_open: called for device `%s`\n", dev );
DBG( 3, "sanei_pp_open: support not compiled\n" );
DBG( 6, "sanei_pp_open: basically, this backend does only compile\n" );
DBG( 6, "sanei_pp_open: on x86 architectures. Furthermore it\n" );
DBG( 6, "sanei_pp_open: needs ioperm() and inb()/outb() calls.\n" );
DBG( 6, "sanei_pp_open: alternativly it makes use of libieee1284\n" );
DBG( 6, "sanei_pp_open: (which isn't present either)\n");
return SANE_STATUS_INVAL;
}
void
sanei_pp_close( int fd )
{
DBG( 4, "sanei_pp_close: called for fd %d\n", fd );
DBG( 2, "sanei_pp_close: fd %d is invalid\n", fd );
return;
}
SANE_Status
sanei_pp_claim( int fd )
{
DBG( 4, "sanei_pp_claim: called for fd %d\n", fd );
DBG( 2, "sanei_pp_claim: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
SANE_Status
sanei_pp_release( int fd )
{
DBG( 4, "sanei_pp_release: called for fd %d\n", fd );
DBG( 2, "sanei_pp_release: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
SANE_Status
sanei_pp_outb_data( int fd, SANE_Byte val )
{
_VAR_NOT_USED( val );
DBG( 4, "sanei_pp_outb_data: called for fd %d\n", fd );
DBG( 2, "sanei_pp_outb_data: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
SANE_Status
sanei_pp_outb_ctrl( int fd, SANE_Byte val )
{
_VAR_NOT_USED( val );
DBG( 4, "sanei_pp_outb_ctrl: called for fd %d\n", fd );
DBG( 2, "sanei_pp_outb_ctrl: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
SANE_Status
sanei_pp_outb_addr( int fd, SANE_Byte val )
{
_VAR_NOT_USED( val );
DBG( 4, "sanei_pp_outb_addr: called for fd %d\n", fd );
DBG( 2, "sanei_pp_outb_addr: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
SANE_Byte
sanei_pp_inb_data( int fd )
{
DBG( 4, "sanei_pp_inb_data: called for fd %d\n", fd );
DBG( 2, "sanei_pp_inb_data: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
SANE_Byte sanei_pp_inb_stat( int fd )
{
DBG( 4, "sanei_pp_inb_stat: called for fd %d\n", fd );
DBG( 2, "sanei_pp_inb_stat: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
SANE_Byte sanei_pp_inb_ctrl( int fd )
{
DBG( 4, "sanei_pp_inb_ctrl: called for fd %d\n", fd );
DBG( 2, "sanei_pp_inb_ctrl: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
SANE_Byte sanei_pp_inb_epp ( int fd )
{
DBG( 4, "sanei_pp_inb_epp: called for fd %d\n", fd );
DBG( 2, "sanei_pp_inb_epp: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
SANE_Status
sanei_pp_getmodes( int fd, int *mode )
{
_VAR_NOT_USED( mode );
DBG( 4, "sanei_pp_getmodes: called for fd %d\n", fd );
DBG( 1, "sanei_pp_getmodes: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
SANE_Status
sanei_pp_setmode( int fd, int mode )
{
_VAR_NOT_USED( mode );
DBG( 4, "sanei_pp_setmode: called for fd %d\n", fd );
DBG( 1, "sanei_pp_setmode: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
void
sanei_pp_udelay( unsigned long usec )
{
_VAR_NOT_USED( usec );
_VAR_NOT_USED( pp_thresh );
DBG( 2, "sanei_pp_udelay: not supported\n" );
}
SANE_Status
sanei_pp_set_datadir( int fd, int rev )
{
_VAR_NOT_USED( rev );
DBG( 4, "sanei_pp_setdir: called for fd %d\n", fd );
DBG( 1, "sanei_pp_setdir: fd %d is invalid\n", fd );
return SANE_STATUS_INVAL;
}
SANE_Bool
sanei_pp_uses_directio( void )
{
DBG( 1, "sanei_pp_uses_directio: not supported\n" );
return SANE_FALSE;
}
#endif /* !HAVE_IOPERM */