aboutsummaryrefslogtreecommitdiffstats
path: root/arch/sh64/lib/io.c
blob: 277e11b10c2b89dfe0107f7381d04bb68faed8d7 (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
/*
 * Copyright (C) 2000 David J. Mckay (david.mckay@st.com)
 *
 * May be copied or modified under the terms of the GNU General Public
 * License.  See linux/COPYING for more information.
 *
 * This file contains the I/O routines for use on the overdrive board
 *
 */

#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/delay.h>
#include <asm/system.h>
#include <asm/processor.h>
#include <asm/io.h>

/*
 * readX/writeX() are used to access memory mapped devices. On some
 * architectures the memory mapped IO stuff needs to be accessed
 * differently. On the SuperH architecture, we just read/write the
 * memory location directly.
 */

/* This is horrible at the moment - needs more work to do something sensible */
#define IO_DELAY()

#define OUT_DELAY(x,type) \
void out##x##_p(unsigned type value,unsigned long port){out##x(value,port);IO_DELAY();}

#define IN_DELAY(x,type) \
unsigned type in##x##_p(unsigned long port) {unsigned type tmp=in##x(port);IO_DELAY();return tmp;}

#if 1
OUT_DELAY(b, long) OUT_DELAY(w, long) OUT_DELAY(l, long)
 IN_DELAY(b, long) IN_DELAY(w, long) IN_DELAY(l, long)
#endif
/*  Now for the string version of these functions */
void outsb(unsigned long port, const void *addr, unsigned long count)
{
	int i;
	unsigned char *p = (unsigned char *) addr;

	for (i = 0; i < count; i++, p++) {
		outb(*p, port);
	}
}

void insb(unsigned long port, void *addr, unsigned long count)
{
	int i;
	unsigned char *p = (unsigned char *) addr;

	for (i = 0; i < count; i++, p++) {
		*p = inb(port);
	}
}

/* For the 16 and 32 bit string functions, we have to worry about alignment.
 * The SH does not do unaligned accesses, so we have to read as bytes and
 * then write as a word or dword.
 * This can be optimised a lot more, especially in the case where the data
 * is aligned
 */

void outsw(unsigned long port, const void *addr, unsigned long count)
{
	int i;
	unsigned short tmp;
	unsigned char *p = (unsigned char *) addr;

	for (i = 0; i < count; i++, p += 2) {
		tmp = (*p) | ((*(p + 1)) << 8);
		outw(tmp, port);
	}
}

void insw(unsigned long port, void *addr, unsigned long count)
{
	int i;
	unsigned short tmp;
	unsigned char *p = (unsigned char *) addr;

	for (i = 0; i < count; i++, p += 2) {
		tmp = inw(port);
		p[0] = tmp & 0xff;
		p[1] = (tmp >> 8) & 0xff;
	}
}

void outsl(unsigned long port, const void *addr, unsigned long count)
{
	int i;
	unsigned tmp;
	unsigned char *p = (unsigned char *) addr;

	for (i = 0; i < count; i++, p += 4) {
		tmp = (*p) | ((*(p + 1)) << 8) | ((*(p + 2)) << 16) |
		    ((*(p + 3)) << 24);
		outl(tmp, port);
	}
}

void insl(unsigned long port, void *addr, unsigned long count)
{
	int i;
	unsigned tmp;
	unsigned char *p = (unsigned char *) addr;

	for (i = 0; i < count; i++, p += 4) {
		tmp = inl(port);
		p[0] = tmp & 0xff;
		p[1] = (tmp >> 8) & 0xff;
		p[2] = (tmp >> 16) & 0xff;
		p[3] = (tmp >> 24) & 0xff;

	}
}

void memcpy_toio(void __iomem *to, const void *from, long count)
{
	unsigned char *p = (unsigned char *) from;

	while (count) {
		count--;
		writeb(*p++, to++);
	}
}

void memcpy_fromio(void *to, void __iomem *from, long count)
{
	int i;
	unsigned char *p = (unsigned char *) to;

	for (i = 0; i < count; i++) {
		p[i] = readb(from);
		from++;
	}
}