2 * Copyright (C) 2000 David J. Mckay (david.mckay@st.com)
4 * May be copied or modified under the terms of the GNU General Public
5 * License. See linux/COPYING for more information.
7 * This file contains the I/O routines for use on the overdrive board
11 #include <linux/config.h>
12 #include <linux/kernel.h>
13 #include <linux/types.h>
14 #include <linux/delay.h>
15 #include <asm/system.h>
16 #include <asm/processor.h>
20 * readX/writeX() are used to access memory mapped devices. On some
21 * architectures the memory mapped IO stuff needs to be accessed
22 * differently. On the SuperH architecture, we just read/write the
23 * memory location directly.
26 /* This is horrible at the moment - needs more work to do something sensible */
29 #define OUT_DELAY(x,type) \
30 void out##x##_p(unsigned type value,unsigned long port){out##x(value,port);IO_DELAY();}
32 #define IN_DELAY(x,type) \
33 unsigned type in##x##_p(unsigned long port) {unsigned type tmp=in##x(port);IO_DELAY();return tmp;}
36 OUT_DELAY(b, long) OUT_DELAY(w, long) OUT_DELAY(l, long)
37 IN_DELAY(b, long) IN_DELAY(w, long) IN_DELAY(l, long)
39 /* Now for the string version of these functions */
40 void outsb(unsigned long port, const void *addr, unsigned long count)
43 unsigned char *p = (unsigned char *) addr;
45 for (i = 0; i < count; i++, p++) {
50 void insb(unsigned long port, void *addr, unsigned long count)
53 unsigned char *p = (unsigned char *) addr;
55 for (i = 0; i < count; i++, p++) {
60 /* For the 16 and 32 bit string functions, we have to worry about alignment.
61 * The SH does not do unaligned accesses, so we have to read as bytes and
62 * then write as a word or dword.
63 * This can be optimised a lot more, especially in the case where the data
67 void outsw(unsigned long port, const void *addr, unsigned long count)
71 unsigned char *p = (unsigned char *) addr;
73 for (i = 0; i < count; i++, p += 2) {
74 tmp = (*p) | ((*(p + 1)) << 8);
79 void insw(unsigned long port, void *addr, unsigned long count)
83 unsigned char *p = (unsigned char *) addr;
85 for (i = 0; i < count; i++, p += 2) {
88 p[1] = (tmp >> 8) & 0xff;
92 void outsl(unsigned long port, const void *addr, unsigned long count)
96 unsigned char *p = (unsigned char *) addr;
98 for (i = 0; i < count; i++, p += 4) {
99 tmp = (*p) | ((*(p + 1)) << 8) | ((*(p + 2)) << 16) |
105 void insl(unsigned long port, void *addr, unsigned long count)
109 unsigned char *p = (unsigned char *) addr;
111 for (i = 0; i < count; i++, p += 4) {
114 p[1] = (tmp >> 8) & 0xff;
115 p[2] = (tmp >> 16) & 0xff;
116 p[3] = (tmp >> 24) & 0xff;
121 void memcpy_toio(void __iomem *to, const void *from, long count)
123 unsigned char *p = (unsigned char *) from;
131 void memcpy_fromio(void *to, void __iomem *from, long count)
134 unsigned char *p = (unsigned char *) to;
136 for (i = 0; i < count; i++) {