LXR uboot/arch/m68k/include/asm/io.h

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * IO header file
   4 *
   5 * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc.
   6 * TsiChung Liew (Tsi-Chung.Liew@freescale.com)
   7 */
   8
   9#ifndef __ASM_M68K_IO_H__
  10#define __ASM_M68K_IO_H__
  11
  12#include <asm/byteorder.h>
  13
  14#ifndef _IO_BASE
  15#define _IO_BASE 0
  16#endif
  17
  18#define __raw_readb(addr) (*(volatile u8 *)(addr))
  19#define __raw_readw(addr) (*(volatile u16 *)(addr))
  20#define __raw_readl(addr) (*(volatile u32 *)(addr))
  21
  22#define __raw_writeb(b,addr) ((*(volatile u8 *) (addr)) = (b))
  23#define __raw_writew(w,addr) ((*(volatile u16 *) (addr)) = (w))
  24#define __raw_writel(l,addr) ((*(volatile u32 *) (addr)) = (l))
  25
  26#define readb(addr)             in_8((volatile u8 *)(addr))
  27#define writeb(b,addr)          out_8((volatile u8 *)(addr), (b))
  28#if !defined(__BIG_ENDIAN)
  29#define readw(addr)             (*(volatile u16 *) (addr))
  30#define readl(addr)             (*(volatile u32 *) (addr))
  31#define writew(b,addr)          ((*(volatile u16 *) (addr)) = (b))
  32#define writel(b,addr)          ((*(volatile u32 *) (addr)) = (b))
  33#else
  34#define readw(addr)             in_be16((volatile u16 *)(addr))
  35#define readl(addr)             in_be32((volatile u32 *)(addr))
  36#define writew(b,addr)          out_be16((volatile u16 *)(addr),(b))
  37#define writel(b,addr)          out_be32((volatile u32 *)(addr),(b))
  38#endif
  39
  40/*
  41 * The insw/outsw/insl/outsl macros don't do byte-swapping.
  42 * They are only used in practice for transferring buffers which
  43 * are arrays of bytes, and byte-swapping is not appropriate in
  44 * that case.  - paulus
  45 */
  46#define insb(port, buf, ns)     _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
  47#define outsb(port, buf, ns)    _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
  48#define insw(port, buf, ns)     _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
  49#define outsw(port, buf, ns)    _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
  50#define insl(port, buf, nl)     _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
  51#define outsl(port, buf, nl)    _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
  52
  53#define inb(port)               in_8((u8 *)((port)+_IO_BASE))
  54#define outb(val, port)         out_8((u8 *)((port)+_IO_BASE), (val))
  55#if !defined(__BIG_ENDIAN)
  56#define inw(port)               in_be16((u16 *)((port)+_IO_BASE))
  57#define outw(val, port)         out_be16((u16 *)((port)+_IO_BASE), (val))
  58#define inl(port)               in_be32((u32 *)((port)+_IO_BASE))
  59#define outl(val, port)         out_be32((u32 *)((port)+_IO_BASE), (val))
  60#else
  61#define inw(port)               in_le16((u16 *)((port)+_IO_BASE))
  62#define outw(val, port)         out_le16((u16 *)((port)+_IO_BASE), (val))
  63#define inl(port)               in_le32((u32 *)((port)+_IO_BASE))
  64#define outl(val, port)         out_le32((u32 *)((port)+_IO_BASE), (val))
  65#endif
  66
  67#define mb() __asm__ __volatile__ ("" : : : "memory")
  68
  69static inline void _insb(volatile u8 * port, void *buf, int ns)
  70{
  71        u8 *data = (u8 *) buf;
  72        while (ns--)
  73                *data++ = *port;
  74}
  75
  76static inline void _outsb(volatile u8 * port, const void *buf, int ns)
  77{
  78        u8 *data = (u8 *) buf;
  79        while (ns--)
  80                *port = *data++;
  81}
  82
  83static inline void _insw(volatile u16 * port, void *buf, int ns)
  84{
  85        u16 *data = (u16 *) buf;
  86        while (ns--)
  87                *data++ = __sw16(*port);
  88}
  89
  90static inline void _outsw(volatile u16 * port, const void *buf, int ns)
  91{
  92        u16 *data = (u16 *) buf;
  93        while (ns--) {
  94                *port = __sw16(*data);
  95                data++;
  96        }
  97}
  98
  99static inline void _insl(volatile u32 * port, void *buf, int nl)
 100{
 101        u32 *data = (u32 *) buf;
 102        while (nl--)
 103                *data++ = __sw32(*port);
 104}
 105
 106static inline void _outsl(volatile u32 * port, const void *buf, int nl)
 107{
 108        u32 *data = (u32 *) buf;
 109        while (nl--) {
 110                *port = __sw32(*data);
 111                data++;
 112        }
 113}
 114
 115static inline void _insw_ns(volatile u16 * port, void *buf, int ns)
 116{
 117        u16 *data = (u16 *) buf;
 118        while (ns--)
 119                *data++ = *port;
 120}
 121
 122static inline void _outsw_ns(volatile u16 * port, const void *buf, int ns)
 123{
 124        u16 *data = (u16 *) buf;
 125        while (ns--) {
 126                *port = *data++;
 127        }
 128}
 129
 130static inline void _insl_ns(volatile u32 * port, void *buf, int nl)
 131{
 132        u32 *data = (u32 *) buf;
 133        while (nl--)
 134                *data++ = *port;
 135}
 136
 137static inline void _outsl_ns(volatile u32 * port, const void *buf, int nl)
 138{
 139        u32 *data = (u32 *) buf;
 140        while (nl--) {
 141                *port = *data;
 142                data++;
 143        }
 144}
 145
 146/*
 147 * The *_ns versions below don't do byte-swapping.
 148 * Neither do the standard versions now, these are just here
 149 * for older code.
 150 */
 151#define insw_ns(port, buf, ns)  _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
 152#define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
 153#define insl_ns(port, buf, nl)  _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
 154#define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
 155
 156#define IO_SPACE_LIMIT ~0
 157
 158/*
 159 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
 160 */
 161static inline int in_8(volatile u8 * addr)
 162{
 163        return (int)*addr;
 164}
 165
 166static inline void out_8(volatile u8 * addr, int val)
 167{
 168        *addr = (u8) val;
 169}
 170
 171static inline int in_le16(volatile u16 * addr)
 172{
 173        return __sw16(*addr);
 174}
 175
 176static inline int in_be16(volatile u16 * addr)
 177{
 178        return (*addr & 0xFFFF);
 179}
 180
 181static inline void out_le16(volatile u16 * addr, int val)
 182{
 183        *addr = __sw16(val);
 184}
 185
 186static inline void out_be16(volatile u16 * addr, int val)
 187{
 188        *addr = (u16) val;
 189}
 190
 191static inline unsigned in_le32(volatile u32 * addr)
 192{
 193        return __sw32(*addr);
 194}
 195
 196static inline unsigned in_be32(volatile u32 * addr)
 197{
 198        return (*addr);
 199}
 200
 201static inline void out_le32(volatile unsigned *addr, int val)
 202{
 203        *addr = __sw32(val);
 204}
 205
 206static inline void out_be32(volatile unsigned *addr, int val)
 207{
 208        *addr = val;
 209}
 210
 211/* Clear and set bits in one shot. These macros can be used to clear and
 212 * set multiple bits in a register using a single call. These macros can
 213 * also be used to set a multiple-bit bit pattern using a mask, by
 214 * specifying the mask in the 'clear' parameter and the new bit pattern
 215 * in the 'set' parameter.
 216 */
 217
 218#define clrbits(type, addr, clear) \
 219        out_##type((addr), in_##type(addr) & ~(clear))
 220
 221#define setbits(type, addr, set) \
 222        out_##type((addr), in_##type(addr) | (set))
 223
 224#define clrsetbits(type, addr, clear, set) \
 225        out_##type((addr), (in_##type(addr) & ~(clear)) | (set))
 226
 227#define clrbits_be32(addr, clear) clrbits(be32, addr, clear)
 228#define setbits_be32(addr, set) setbits(be32, addr, set)
 229#define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set)
 230
 231#define clrbits_le32(addr, clear) clrbits(le32, addr, clear)
 232#define setbits_le32(addr, set) setbits(le32, addr, set)
 233#define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set)
 234
 235#define clrbits_be16(addr, clear) clrbits(be16, addr, clear)
 236#define setbits_be16(addr, set) setbits(be16, addr, set)
 237#define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set)
 238
 239#define clrbits_le16(addr, clear) clrbits(le16, addr, clear)
 240#define setbits_le16(addr, set) setbits(le16, addr, set)
 241#define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set)
 242
 243#define clrbits_8(addr, clear) clrbits(8, addr, clear)
 244#define setbits_8(addr, set) setbits(8, addr, set)
 245#define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set)
 246
 247static inline void sync(void)
 248{
 249        /* This sync function is for PowerPC or other architecture instruction
 250         * ColdFire does not have this instruction. Dummy function, added for
 251         * compatibility (CFI driver)
 252         */
 253}
 254
 255#include <asm-generic/io.h>
 256
 257#endif                          /* __ASM_M68K_IO_H__ */
 258