summaryrefslogtreecommitdiff
path: root/include/asm-m68k/io.h
blob: 8dea02abab532d880af3ce9e07308cd4c738f4fd (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
/*
 * 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__ */