Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2000 David J. Mckay (david.mckay@st.com) |
| 3 | * |
| 4 | * May be copied or modified under the terms of the GNU General Public |
| 5 | * License. See linux/COPYING for more information. |
| 6 | * |
| 7 | * This file contains the I/O routines for use on the overdrive board |
| 8 | * |
| 9 | */ |
| 10 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | #include <linux/kernel.h> |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/delay.h> |
| 14 | #include <asm/system.h> |
| 15 | #include <asm/processor.h> |
| 16 | #include <asm/io.h> |
| 17 | |
| 18 | /* |
| 19 | * readX/writeX() are used to access memory mapped devices. On some |
| 20 | * architectures the memory mapped IO stuff needs to be accessed |
| 21 | * differently. On the SuperH architecture, we just read/write the |
| 22 | * memory location directly. |
| 23 | */ |
| 24 | |
| 25 | /* This is horrible at the moment - needs more work to do something sensible */ |
| 26 | #define IO_DELAY() |
| 27 | |
| 28 | #define OUT_DELAY(x,type) \ |
| 29 | void out##x##_p(unsigned type value,unsigned long port){out##x(value,port);IO_DELAY();} |
| 30 | |
| 31 | #define IN_DELAY(x,type) \ |
| 32 | unsigned type in##x##_p(unsigned long port) {unsigned type tmp=in##x(port);IO_DELAY();return tmp;} |
| 33 | |
| 34 | #if 1 |
| 35 | OUT_DELAY(b, long) OUT_DELAY(w, long) OUT_DELAY(l, long) |
| 36 | IN_DELAY(b, long) IN_DELAY(w, long) IN_DELAY(l, long) |
| 37 | #endif |
| 38 | /* Now for the string version of these functions */ |
| 39 | void outsb(unsigned long port, const void *addr, unsigned long count) |
| 40 | { |
| 41 | int i; |
| 42 | unsigned char *p = (unsigned char *) addr; |
| 43 | |
| 44 | for (i = 0; i < count; i++, p++) { |
| 45 | outb(*p, port); |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | void insb(unsigned long port, void *addr, unsigned long count) |
| 50 | { |
| 51 | int i; |
| 52 | unsigned char *p = (unsigned char *) addr; |
| 53 | |
| 54 | for (i = 0; i < count; i++, p++) { |
| 55 | *p = inb(port); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | /* For the 16 and 32 bit string functions, we have to worry about alignment. |
| 60 | * The SH does not do unaligned accesses, so we have to read as bytes and |
| 61 | * then write as a word or dword. |
| 62 | * This can be optimised a lot more, especially in the case where the data |
| 63 | * is aligned |
| 64 | */ |
| 65 | |
| 66 | void outsw(unsigned long port, const void *addr, unsigned long count) |
| 67 | { |
| 68 | int i; |
| 69 | unsigned short tmp; |
| 70 | unsigned char *p = (unsigned char *) addr; |
| 71 | |
| 72 | for (i = 0; i < count; i++, p += 2) { |
| 73 | tmp = (*p) | ((*(p + 1)) << 8); |
| 74 | outw(tmp, port); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | void insw(unsigned long port, void *addr, unsigned long count) |
| 79 | { |
| 80 | int i; |
| 81 | unsigned short tmp; |
| 82 | unsigned char *p = (unsigned char *) addr; |
| 83 | |
| 84 | for (i = 0; i < count; i++, p += 2) { |
| 85 | tmp = inw(port); |
| 86 | p[0] = tmp & 0xff; |
| 87 | p[1] = (tmp >> 8) & 0xff; |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | void outsl(unsigned long port, const void *addr, unsigned long count) |
| 92 | { |
| 93 | int i; |
| 94 | unsigned tmp; |
| 95 | unsigned char *p = (unsigned char *) addr; |
| 96 | |
| 97 | for (i = 0; i < count; i++, p += 4) { |
| 98 | tmp = (*p) | ((*(p + 1)) << 8) | ((*(p + 2)) << 16) | |
| 99 | ((*(p + 3)) << 24); |
| 100 | outl(tmp, port); |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | void insl(unsigned long port, void *addr, unsigned long count) |
| 105 | { |
| 106 | int i; |
| 107 | unsigned tmp; |
| 108 | unsigned char *p = (unsigned char *) addr; |
| 109 | |
| 110 | for (i = 0; i < count; i++, p += 4) { |
| 111 | tmp = inl(port); |
| 112 | p[0] = tmp & 0xff; |
| 113 | p[1] = (tmp >> 8) & 0xff; |
| 114 | p[2] = (tmp >> 16) & 0xff; |
| 115 | p[3] = (tmp >> 24) & 0xff; |
| 116 | |
| 117 | } |
| 118 | } |
| 119 | |
| 120 | void memcpy_toio(void __iomem *to, const void *from, long count) |
| 121 | { |
| 122 | unsigned char *p = (unsigned char *) from; |
| 123 | |
| 124 | while (count) { |
| 125 | count--; |
| 126 | writeb(*p++, to++); |
| 127 | } |
| 128 | } |
| 129 | |
| 130 | void memcpy_fromio(void *to, void __iomem *from, long count) |
| 131 | { |
| 132 | int i; |
| 133 | unsigned char *p = (unsigned char *) to; |
| 134 | |
| 135 | for (i = 0; i < count; i++) { |
| 136 | p[i] = readb(from); |
| 137 | from++; |
| 138 | } |
| 139 | } |