include/asm-m68k/io.h

   1 /*
   2  * IO header file
   3  *
   4  * Copyright (C) 2004-2007 Freescale Semiconductor, Inc.
   5  * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License as
  12  * published by the Free Software Foundation; either version 2 of
  13  * the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  23  * MA 02111-1307 USA
  24  */
  25
  26 #ifndef __ASM_M68K_IO_H__
  27 #define __ASM_M68K_IO_H__
  28
  29 #include <asm/byteorder.h>
  30
  31 #define __raw_readb(addr) (*(volatile u8 *)(addr))
  32 #define __raw_readw(addr) (*(volatile u16 *)(addr))
  33 #define __raw_readl(addr) (*(volatile u32 *)(addr))
  34
  35 #define __raw_writeb(b,addr) ((*(volatile u8 *) (addr)) = (b))
  36 #define __raw_writew(w,addr) ((*(volatile u16 *) (addr)) = (w))
  37 #define __raw_writel(l,addr) ((*(volatile u32 *) (addr)) = (l))
  38
  39 #define readb(addr)             in_8((volatile u8 *)(addr))
  40 #define writeb(b,addr)          out_8((volatile u8 *)(addr), (b))
  41 #if !defined(__BIG_ENDIAN)
  42 #define readw(addr)             (*(volatile u16 *) (addr))
  43 #define readl(addr)             (*(volatile u32 *) (addr))
  44 #define writew(b,addr)          ((*(volatile u16 *) (addr)) = (b))
  45 #define writel(b,addr)          ((*(volatile u32 *) (addr)) = (b))
  46 #else
  47 #define readw(addr)             in_le16((volatile u16 *)(addr))
  48 #define readl(addr)             in_le32((volatile u32 *)(addr))
  49 #define writew(b,addr)          out_le16((volatile u16 *)(addr),(b))
  50 #define writel(b,addr)          out_le32((volatile u32 *)(addr),(b))
  51 #endif
  52
  53 /*
  54  * The insw/outsw/insl/outsl macros don't do byte-swapping.
  55  * They are only used in practice for transferring buffers which
  56  * are arrays of bytes, and byte-swapping is not appropriate in
  57  * that case.  - paulus
  58  */
  59 #define insb(port, buf, ns)     _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
  60 #define outsb(port, buf, ns)    _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
  61 #define insw(port, buf, ns)     _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
  62 #define outsw(port, buf, ns)    _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
  63 #define insl(port, buf, nl)     _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
  64 #define outsl(port, buf, nl)    _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
  65
  66 #define inb(port)               in_8((u8 *)((port)+_IO_BASE))
  67 #define outb(val, port)         out_8((u8 *)((port)+_IO_BASE), (val))
  68 #if !defined(__BIG_ENDIAN)
  69 #define inw(port)               in_be16((u16 *)((port)+_IO_BASE))
  70 #define outw(val, port)         out_be16((u16 *)((port)+_IO_BASE), (val))
  71 #define inl(port)               in_be32((u32 *)((port)+_IO_BASE))
  72 #define outl(val, port)         out_be32((u32 *)((port)+_IO_BASE), (val))
  73 #else
  74 #define inw(port)               in_le16((u16 *)((port)+_IO_BASE))
  75 #define outw(val, port)         out_le16((u16 *)((port)+_IO_BASE), (val))
  76 #define inl(port)               in_le32((u32 *)((port)+_IO_BASE))
  77 #define outl(val, port)         out_le32((u32 *)((port)+_IO_BASE), (val))
  78 #endif
  79
  80 extern inline void _insb(volatile u8 * port, void *buf, int ns)
  81 {
  82         u8 *data = (u8 *) buf;
  83         while (ns--)
  84                 *data++ = *port;
  85 }
  86
  87 extern inline void _outsb(volatile u8 * port, const void *buf, int ns)
  88 {
  89         u8 *data = (u8 *) buf;
  90         while (ns--)
  91                 *port = *data++;
  92 }
  93
  94 extern inline void _insw(volatile u16 * port, void *buf, int ns)
  95 {
  96         u16 *data = (u16 *) buf;
  97         while (ns--)
  98                 *data++ = __sw16(*port);
  99 }
 100
 101 extern inline void _outsw(volatile u16 * port, const void *buf, int ns)
 102 {
 103         u16 *data = (u16 *) buf;
 104         while (ns--) {
 105                 *port = __sw16(*data);
 106                 data++;
 107         }
 108 }
 109
 110 extern inline void _insl(volatile u32 * port, void *buf, int nl)
 111 {
 112         u32 *data = (u32 *) buf;
 113         while (nl--)
 114                 *data++ = __sw32(*port);
 115 }
 116
 117 extern inline void _outsl(volatile u32 * port, const void *buf, int nl)
 118 {
 119         u32 *data = (u32 *) buf;
 120         while (nl--) {
 121                 *port = __sw32(*data);
 122                 data++;
 123         }
 124 }
 125
 126 extern inline void _insw_ns(volatile u16 * port, void *buf, int ns)
 127 {
 128         u16 *data = (u16 *) buf;
 129         while (ns--)
 130                 *data++ = *port;
 131 }
 132
 133 extern inline void _outsw_ns(volatile u16 * port, const void *buf, int ns)
 134 {
 135         u16 *data = (u16 *) buf;
 136         while (ns--) {
 137                 *port = *data++;
 138         }
 139 }
 140
 141 extern inline void _insl_ns(volatile u32 * port, void *buf, int nl)
 142 {
 143         u32 *data = (u32 *) buf;
 144         while (nl--)
 145                 *data++ = *port;
 146 }
 147
 148 extern inline void _outsl_ns(volatile u32 * port, const void *buf, int nl)
 149 {
 150         u32 *data = (u32 *) buf;
 151         while (nl--) {
 152                 *port = *data;
 153                 data++;
 154         }
 155 }
 156
 157 /*
 158  * The *_ns versions below don't do byte-swapping.
 159  * Neither do the standard versions now, these are just here
 160  * for older code.
 161  */
 162 #define insw_ns(port, buf, ns)  _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
 163 #define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
 164 #define insl_ns(port, buf, nl)  _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
 165 #define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
 166
 167 #define IO_SPACE_LIMIT ~0
 168
 169 /*
 170  * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
 171  */
 172 extern inline int in_8(volatile u8 * addr)
 173 {
 174         return (int)*addr;
 175 }
 176
 177 extern inline void out_8(volatile u8 * addr, int val)
 178 {
 179         *addr = (u8) val;
 180 }
 181
 182 extern inline int in_le16(volatile u16 * addr)
 183 {
 184         return __sw16(*addr);
 185 }
 186
 187 extern inline int in_be16(volatile u16 * addr)
 188 {
 189         return (*addr & 0xFFFF);
 190 }
 191
 192 extern inline void out_le16(volatile u16 * addr, int val)
 193 {
 194         *addr = __sw16(val);
 195 }
 196
 197 extern inline void out_be16(volatile u16 * addr, int val)
 198 {
 199         *addr = (u16) val;
 200 }
 201
 202 extern inline unsigned in_le32(volatile u32 * addr)
 203 {
 204         return __sw32(*addr);
 205 }
 206
 207 extern inline unsigned in_be32(volatile u32 * addr)
 208 {
 209         return (*addr);
 210 }
 211
 212 extern inline void out_le32(volatile unsigned *addr, int val)
 213 {
 214         *addr = __sw32(val);
 215 }
 216
 217 extern inline void out_be32(volatile unsigned *addr, int val)
 218 {
 219         *addr = val;
 220 }
 221
 222 static inline void sync(void)
 223 {
 224         /* This sync function is for PowerPC or other architecture instruction
 225          * ColdFire does not have this instruction. Dummy function, added for
 226          * compatibility (CFI driver)
 227          */
 228 }
 229
 230 /*
 231  * Given a physical address and a length, return a virtual address
 232  * that can be used to access the memory range with the caching
 233  * properties specified by "flags".
 234  */
 235 typedef unsigned long phys_addr_t;
 236
 237 #define MAP_NOCACHE     (0)
 238 #define MAP_WRCOMBINE   (0)
 239 #define MAP_WRBACK      (0)
 240 #define MAP_WRTHROUGH   (0)
 241
 242 static inline void *map_physmem(phys_addr_t paddr, unsigned long len,
 243                                 unsigned long flags)
 244 {
 245         return (void *)paddr;
 246 }
 247
 248 /*
 249  * Take down a mapping set up by map_physmem().
 250  */
 251 static inline void unmap_physmem(void *vaddr, unsigned long flags)
 252 {
 253
 254 }
 255
 256 #endif                          /* __ASM_M68K_IO_H__ */