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TsiChung Liew8e585f02007-06-18 13:50:13 -05001/*
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 */
Haiying Wang3a197b22007-02-21 16:52:31 +010025
TsiChungLiew8cd5cd62007-07-05 22:42:23 -050026#ifndef __ASM_M68K_IO_H__
TsiChung Liew8e585f02007-06-18 13:50:13 -050027#define __ASM_M68K_IO_H__
28
29#include <asm/byteorder.h>
30
TsiChungLiew397b7b82008-01-14 17:35:44 -060031#define __raw_readb(addr) (*(volatile u8 *)(addr))
32#define __raw_readw(addr) (*(volatile u16 *)(addr))
33#define __raw_readl(addr) (*(volatile u32 *)(addr))
Haavard Skinnemoen812711c2007-12-13 12:56:31 +010034
TsiChungLiew397b7b82008-01-14 17:35:44 -060035#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))
Haavard Skinnemoen812711c2007-12-13 12:56:31 +010038
TsiChungLiewab77bc52007-08-15 15:39:17 -050039#define readb(addr) in_8((volatile u8 *)(addr))
40#define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
TsiChung Liew8e585f02007-06-18 13:50:13 -050041#if !defined(__BIG_ENDIAN)
TsiChungLiewab77bc52007-08-15 15:39:17 -050042#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))
TsiChung Liew8e585f02007-06-18 13:50:13 -050046#else
TsiChungLiewab77bc52007-08-15 15:39:17 -050047#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))
TsiChung Liew8e585f02007-06-18 13:50:13 -050051#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 */
TsiChungLiewab77bc52007-08-15 15:39:17 -050059#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))
TsiChung Liew8e585f02007-06-18 13:50:13 -050065
TsiChungLiewab77bc52007-08-15 15:39:17 -050066#define inb(port) in_8((u8 *)((port)+_IO_BASE))
67#define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
TsiChung Liew8e585f02007-06-18 13:50:13 -050068#if !defined(__BIG_ENDIAN)
TsiChungLiewab77bc52007-08-15 15:39:17 -050069#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))
TsiChung Liew8e585f02007-06-18 13:50:13 -050073#else
TsiChungLiewab77bc52007-08-15 15:39:17 -050074#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))
TsiChung Liew8e585f02007-06-18 13:50:13 -050078#endif
79
80extern inline void _insb(volatile u8 * port, void *buf, int ns)
Haiying Wang3a197b22007-02-21 16:52:31 +010081{
TsiChung Liew8e585f02007-06-18 13:50:13 -050082 u8 *data = (u8 *) buf;
83 while (ns--)
84 *data++ = *port;
Haiying Wang3a197b22007-02-21 16:52:31 +010085}
86
TsiChung Liew8e585f02007-06-18 13:50:13 -050087extern 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
94extern 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
101extern 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
110extern 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
117extern 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
126extern 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
133extern 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
141extern 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
148extern 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 */
TsiChungLiewab77bc52007-08-15 15:39:17 -0500162#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))
TsiChung Liew8e585f02007-06-18 13:50:13 -0500166
167#define IO_SPACE_LIMIT ~0
168
169/*
170 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
171 */
172extern inline int in_8(volatile u8 * addr)
173{
174 return (int)*addr;
175}
176
177extern inline void out_8(volatile u8 * addr, int val)
178{
179 *addr = (u8) val;
180}
181
182extern inline int in_le16(volatile u16 * addr)
183{
184 return __sw16(*addr);
185}
186
187extern inline int in_be16(volatile u16 * addr)
188{
189 return (*addr & 0xFFFF);
190}
191
192extern inline void out_le16(volatile u16 * addr, int val)
193{
194 *addr = __sw16(val);
195}
196
197extern inline void out_be16(volatile u16 * addr, int val)
198{
199 *addr = (u16) val;
200}
201
202extern inline unsigned in_le32(volatile u32 * addr)
203{
204 return __sw32(*addr);
205}
206
207extern inline unsigned in_be32(volatile u32 * addr)
208{
209 return (*addr);
210}
211
212extern inline void out_le32(volatile unsigned *addr, int val)
213{
214 *addr = __sw32(val);
215}
216
217extern inline void out_be32(volatile unsigned *addr, int val)
218{
219 *addr = val;
220}
221
TsiChungLiew6fde84a2007-08-05 03:43:30 -0500222static 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}
Haavard Skinnemoen4d7d6932007-12-13 12:56:33 +0100229
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 */
235typedef 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
TsiChungLiew397b7b82008-01-14 17:35:44 -0600242static inline void *map_physmem(phys_addr_t paddr, unsigned long len,
243 unsigned long flags)
Haavard Skinnemoen4d7d6932007-12-13 12:56:33 +0100244{
245 return (void *)paddr;
246}
247
248/*
249 * Take down a mapping set up by map_physmem().
250 */
251static inline void unmap_physmem(void *vaddr, unsigned long flags)
252{
253
254}
255
TsiChung Liew8e585f02007-06-18 13:50:13 -0500256#endif /* __ASM_M68K_IO_H__ */