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/*
* IO header file
*
* Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
* TsiChung Liew (Tsi-Chung.Liew@freescale.com)
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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
*/
#ifndef __ASM_M68K_IO_H__
#define __ASM_M68K_IO_H__
#include <asm/byteorder.h>
#define readb(addr) in_8((volatile u8 *)(addr))
#define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
#if !defined(__BIG_ENDIAN)
#define readw(addr) (*(volatile u16 *) (addr))
#define readl(addr) (*(volatile u32 *) (addr))
#define writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
#define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
#else
#define readw(addr) in_le16((volatile u16 *)(addr))
#define readl(addr) in_le32((volatile u32 *)(addr))
#define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
#define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
#endif
/*
* The insw/outsw/insl/outsl macros don't do byte-swapping.
* They are only used in practice for transferring buffers which
* are arrays of bytes, and byte-swapping is not appropriate in
* that case. - paulus
*/
#define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
#define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
#define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
#define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
#define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
#define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
#define inb(port) in_8((u8 *)((port)+_IO_BASE))
#define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
#if !defined(__BIG_ENDIAN)
#define inw(port) in_be16((u16 *)((port)+_IO_BASE))
#define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val))
#define inl(port) in_be32((u32 *)((port)+_IO_BASE))
#define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val))
#else
#define inw(port) in_le16((u16 *)((port)+_IO_BASE))
#define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
#define inl(port) in_le32((u32 *)((port)+_IO_BASE))
#define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
#endif
extern inline void _insb(volatile u8 * port, void *buf, int ns)
{
u8 *data = (u8 *) buf;
while (ns--)
*data++ = *port;
}
extern inline void _outsb(volatile u8 * port, const void *buf, int ns)
{
u8 *data = (u8 *) buf;
while (ns--)
*port = *data++;
}
extern inline void _insw(volatile u16 * port, void *buf, int ns)
{
u16 *data = (u16 *) buf;
while (ns--)
*data++ = __sw16(*port);
}
extern inline void _outsw(volatile u16 * port, const void *buf, int ns)
{
u16 *data = (u16 *) buf;
while (ns--) {
*port = __sw16(*data);
data++;
}
}
extern inline void _insl(volatile u32 * port, void *buf, int nl)
{
u32 *data = (u32 *) buf;
while (nl--)
*data++ = __sw32(*port);
}
extern inline void _outsl(volatile u32 * port, const void *buf, int nl)
{
u32 *data = (u32 *) buf;
while (nl--) {
*port = __sw32(*data);
data++;
}
}
extern inline void _insw_ns(volatile u16 * port, void *buf, int ns)
{
u16 *data = (u16 *) buf;
while (ns--)
*data++ = *port;
}
extern inline void _outsw_ns(volatile u16 * port, const void *buf, int ns)
{
u16 *data = (u16 *) buf;
while (ns--) {
*port = *data++;
}
}
extern inline void _insl_ns(volatile u32 * port, void *buf, int nl)
{
u32 *data = (u32 *) buf;
while (nl--)
*data++ = *port;
}
extern inline void _outsl_ns(volatile u32 * port, const void *buf, int nl)
{
u32 *data = (u32 *) buf;
while (nl--) {
*port = *data;
data++;
}
}
/*
* The *_ns versions below don't do byte-swapping.
* Neither do the standard versions now, these are just here
* for older code.
*/
#define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
#define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
#define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
#define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
#define IO_SPACE_LIMIT ~0
/*
* 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
*/
extern inline int in_8(volatile u8 * addr)
{
return (int)*addr;
}
extern inline void out_8(volatile u8 * addr, int val)
{
*addr = (u8) val;
}
extern inline int in_le16(volatile u16 * addr)
{
return __sw16(*addr);
}
extern inline int in_be16(volatile u16 * addr)
{
return (*addr & 0xFFFF);
}
extern inline void out_le16(volatile u16 * addr, int val)
{
*addr = __sw16(val);
}
extern inline void out_be16(volatile u16 * addr, int val)
{
*addr = (u16) val;
}
extern inline unsigned in_le32(volatile u32 * addr)
{
return __sw32(*addr);
}
extern inline unsigned in_be32(volatile u32 * addr)
{
return (*addr);
}
extern inline void out_le32(volatile unsigned *addr, int val)
{
*addr = __sw32(val);
}
extern inline void out_be32(volatile unsigned *addr, int val)
{
*addr = val;
}
#endif /* __ASM_M68K_IO_H__ */
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