sane-project-backends/backend/plustek-pp_sysdep.h

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9.6 KiB
C

/* @file plustek-pp_sysdep.h
* @brief a trial to centralize changes between the different
* kernel-versions some stuff is maybe not relevant, but anyway...
*
* Copyright (C) 2000-2004 Gerhard Jaeger <gerhard@gjaeger.de>
*
* History:
* 0.30 - initial version
* 0.38 - added this header
* 0.39 - added kernel 2.4 stuff
* 0.40 - added slab.h/malloc.h stuff for kernel >= 2.4.17
* 0.41 - no changes
* 0.42 - added _GET_TIME
* - added LINUX_26 for new kernel
* - added _MINOR
* 0.43 - no changes
* .
* <hr>
* 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.
* <hr>
*/
#ifndef _SYSDEP_H_
#define _SYSDEP_H_
#ifndef LINUX_VERSION_CODE
# include <linux/version.h>
#endif
#ifndef VERSION_CODE
# define VERSION_CODE(vers,rel,seq) ( ((vers)<<16) | ((rel)<<8) | (seq) )
#endif
/* only allow > 2.0.x */
#if LINUX_VERSION_CODE < VERSION_CODE(2,0,0)
# error "This kernel is too old: not supported by this file"
#endif
#if LINUX_VERSION_CODE < VERSION_CODE(2,1,0)
# define LINUX_20
#elif LINUX_VERSION_CODE < VERSION_CODE(2,4,0)
# define LINUX_21
#elif LINUX_VERSION_CODE < VERSION_CODE(2,6,0)
# define LINUX_24
#else
# define LINUX_24
# define LINUX_26
#endif
#include <linux/types.h> /* used later in this header */
/* Modularization issues */
#if LINUX_VERSION_CODE < VERSION_CODE(2,1,18)
# define __USE_OLD_SYMTAB__
# define EXPORT_NO_SYMBOLS register_symtab(NULL);
# define REGISTER_SYMTAB(tab) register_symtab(tab)
#else
# define REGISTER_SYMTAB(tab) /* nothing */
#endif
#ifdef __USE_OLD_SYMTAB__
# define __MODULE_STRING(s) /* nothing */
# define MODULE_PARM(v,t) /* nothing */
# define MODULE_PARM_DESC(v,t) /* nothing */
# define MODULE_AUTHOR(n) /* nothing */
# define MODULE_DESCRIPTION(d) /* nothing */
# define MODULE_SUPPORTED_DEVICE(n) /* nothing */
#endif
#if LINUX_VERSION_CODE < VERSION_CODE(2,1,31)
# define CLOSETYPE void
# define CLOSERETURN(arg)
#else
# define CLOSETYPE int
# define CLOSERETURN(arg) return arg
#endif
/*
* "select" changed in 2.1.23. The implementation is twin, but this
* header is new
*/
#if LINUX_VERSION_CODE > VERSION_CODE(2,1,22)
# include <linux/poll.h>
#else
# define __USE_OLD_SELECT__
#endif
/* Other change in the fops are solved using pseudo-types */
#if defined(LINUX_21) || defined(LINUX_24) || defined(LINUX_26)
# define lseek_t long long
# define lseek_off_t long long
#else
# define lseek_t int
# define lseek_off_t off_t
#endif
/* changed the prototype of read/write */
#if defined(LINUX_21) || defined (LINUX_24) || defined(LINUX_26) || defined(__alpha__)
# define count_t unsigned long
# define read_write_t long
#else
# define count_t int
# define read_write_t int
#endif
#if LINUX_VERSION_CODE < VERSION_CODE(2,1,31)
# define release_t void
# define release_return(x) return
#else
# define release_t int
# define release_return(x) return (x)
#endif
/*
* access to user space: use the 2.1 functions,
* and implement them as macros for 2.0
*/
#ifdef LINUX_20
# include <asm/segment.h>
# define access_ok(t,a,sz) (verify_area((t),(a),(sz)) ? 0 : 1)
# define verify_area_20 verify_area
# define copy_to_user(t,f,n) (memcpy_tofs(t,f,n), 0)
# define __copy_to_user(t,f,n) copy_to_user((t),(f),(n))
# define copy_to_user_ret(t,f,n,r) copy_to_user((t),(f),(n))
# define copy_from_user(t,f,n) (memcpy_fromfs((t),(f),(n)), 0)
# define __copy_from_user(t,f,n) copy_from_user((t),(f),(n))
# define copy_from_user_ret(t,f,n,r) copy_from_user((t),(f),(n))
# define PUT_USER(val,add) (put_user((val),(add)), 0)
# define __PUT_USER(val,add) PUT_USER((val),(add))
# define PUT_USER_RET(val,add,ret) PUT_USER((val),(add))
# define GET_USER(dest,add) ((dest)=get_user((add)), 0)
# define __GET_USER(dest,add) GET_USER((dest),(add))
# define GET_USER_RET(dest,add,ret) GET_USER((dest),(add))
#else
# include <asm/uaccess.h>
# include <asm/io.h>
# define verify_area_20(t,a,sz) (0) /* == success */
# define PUT_USER put_user
# define __PUT_USER __put_user
# define PUT_USER_RET put_user_ret
# define GET_USER get_user
# define __GET_USER __get_user
# define GET_USER_RET get_user_ret
/* starting with 2.4.0-test8, they removed the put_user_ret and get_user_ret
* macros, so we recode'em
*/
#if defined(LINUX_24) || defined(LINUX_26)
#ifndef put_user_ret
# define put_user_ret(x,ptr,ret) ({ if (put_user(x,ptr)) return ret; })
#endif
#ifndef get_user_ret
# define get_user_ret(x,ptr,ret) ({ if (get_user(x,ptr)) return ret; })
#endif
#endif
#endif
/* ioremap */
#ifdef LINUX_20
# define ioremap vremap
# define iounmap vfree
#endif
/* The use_count of exec_domain and binfmt changed in 2.1.23 */
#ifdef LINUX_20
# define INCRCOUNT(p) ((p)->module ? __MOD_INC_USE_COUNT((p)->module) : 0)
# define CURRCOUNT(p) ((p)->module && (p)->module->usecount)
# define DECRCOUNT(p) ((p)->module ? __MOD_DEC_USE_COUNT((p)->module) : 0)
#else
# define INCRCOUNT(p) ((p)->use_count++)
# define CURRCOUNT(p) ((p)->use_count)
# define DECRCOUNT(p) ((p)->use_count--)
#endif
/* register_dynamic no more existent -- just have 0 as inum */
#if LINUX_VERSION_CODE >= VERSION_CODE(2,1,29)
# define proc_register_dynamic proc_register
#endif
#if LINUX_VERSION_CODE < VERSION_CODE(2,1,37)
# define test_and_set_bit(nr,addr) test_bit((nr),(addr))
# define test_and_clear_bit(nr,addr) clear_bit((nr),(addr))
# define test_and_change_bit(nr,addr) change_bit((nr),(addr))
#endif
/* 2.1.30 removed these functions. Let's define them, just in case */
#if LINUX_VERSION_CODE > VERSION_CODE(2,1,29)
# define queue_task_irq queue_task
# define queue_task_irq_off queue_task
#endif
/* 2.1.10 and 2.1.43 introduced new functions. They are worth using */
#if LINUX_VERSION_CODE < VERSION_CODE(2,1,10)
# include <asm/byteorder.h>
# ifdef __LITTLE_ENDIAN
# define cpu_to_le16(x) (x)
# define cpu_to_le32(x) (x)
# define cpu_to_be16(x) htons((x))
# define cpu_to_be32(x) htonl((x))
# else
# define cpu_to_be16(x) (x)
# define cpu_to_be32(x) (x)
extern inline __u16 cpu_to_le16(__u16 x) { return (x<<8) | (x>>8);}
extern inline __u32 cpu_to_le32(__u32 x) { return((x>>24) |
((x>>8)&0xff00) | ((x<<8)&0xff0000) | (x<<24));}
# endif
# define le16_to_cpu(x) cpu_to_le16(x)
# define le32_to_cpu(x) cpu_to_le32(x)
# define be16_to_cpu(x) cpu_to_be16(x)
# define be32_to_cpu(x) cpu_to_be32(x)
#endif
#if LINUX_VERSION_CODE < VERSION_CODE(2,1,43)
# define cpu_to_le16p(addr) (cpu_to_le16(*(addr)))
# define cpu_to_le32p(addr) (cpu_to_le32(*(addr)))
# define cpu_to_be16p(addr) (cpu_to_be16(*(addr)))
# define cpu_to_be32p(addr) (cpu_to_be32(*(addr)))
extern inline void cpu_to_le16s(__u16 *a) {*a = cpu_to_le16(*a);}
extern inline void cpu_to_le32s(__u16 *a) {*a = cpu_to_le32(*a);}
extern inline void cpu_to_be16s(__u16 *a) {*a = cpu_to_be16(*a);}
extern inline void cpu_to_be32s(__u16 *a) {*a = cpu_to_be32(*a);}
# define le16_to_cpup(x) cpu_to_le16p(x)
# define le32_to_cpup(x) cpu_to_le32p(x)
# define be16_to_cpup(x) cpu_to_be16p(x)
# define be32_to_cpup(x) cpu_to_be32p(x)
# define le16_to_cpus(x) cpu_to_le16s(x)
# define le32_to_cpus(x) cpu_to_le32s(x)
# define be16_to_cpus(x) cpu_to_be16s(x)
# define be32_to_cpus(x) cpu_to_be32s(x)
#endif
#if LINUX_VERSION_CODE < VERSION_CODE(2,1,15)
# define __USE_OLD_REBUILD_HEADER__
#endif
#if LINUX_VERSION_CODE < VERSION_CODE(2,1,30)
# define in_interrupt() (intr_count!=0)
#endif
/*
* from 2.4.17 on, they decided to use slab.h instead of malloc.h... so what...
* somewhere from 2.4.18-pre9 they skipped get_fast_time...
*/
#if LINUX_VERSION_CODE < VERSION_CODE(2,4,17)
# include "linux/malloc.h"
# define _GET_TIME get_fast_time
#else
# include "linux/slab.h"
# define _GET_TIME do_gettimeofday
#endif
#ifdef LINUX_26
# define _MINOR(p) iminor(p)
#else
# define _MINOR(p) minor(p->i_rdev)
#endif
#endif /* _SYSDEP_H_ */
/* END PLUSTEK-PP_SYSDEP.H ..................................................*/