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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
Haavard Skinnemoen812711c2007-12-13 12:56:31 +010031/* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
32 * two accesses to memory, which may be undesirable for some devices.
33 */
34#define __raw_readb(addr) \
35 ({ u8 __v = (*(volatile u8 *) (addr)); __v; })
36#define __raw_readw(addr) \
37 ({ u16 __v = (*(volatile u16 *) (addr)); __v; })
38#define __raw_readl(addr) \
39 ({ u32 __v = (*(volatile u32 *) (addr)); __v; })
40
41#define __raw_writeb(addr,b) (void)((*(volatile u8 *) (addr)) = (b))
42#define __raw_writew(addr,w) (void)((*(volatile u16 *) (addr)) = (w))
43#define __raw_writel(addr,l) (void)((*(volatile u32 *) (addr)) = (l))
44
TsiChungLiewab77bc52007-08-15 15:39:17 -050045#define readb(addr) in_8((volatile u8 *)(addr))
46#define writeb(b,addr) out_8((volatile u8 *)(addr), (b))
TsiChung Liew8e585f02007-06-18 13:50:13 -050047#if !defined(__BIG_ENDIAN)
TsiChungLiewab77bc52007-08-15 15:39:17 -050048#define readw(addr) (*(volatile u16 *) (addr))
49#define readl(addr) (*(volatile u32 *) (addr))
50#define writew(b,addr) ((*(volatile u16 *) (addr)) = (b))
51#define writel(b,addr) ((*(volatile u32 *) (addr)) = (b))
TsiChung Liew8e585f02007-06-18 13:50:13 -050052#else
TsiChungLiewab77bc52007-08-15 15:39:17 -050053#define readw(addr) in_le16((volatile u16 *)(addr))
54#define readl(addr) in_le32((volatile u32 *)(addr))
55#define writew(b,addr) out_le16((volatile u16 *)(addr),(b))
56#define writel(b,addr) out_le32((volatile u32 *)(addr),(b))
TsiChung Liew8e585f02007-06-18 13:50:13 -050057#endif
58
59/*
60 * The insw/outsw/insl/outsl macros don't do byte-swapping.
61 * They are only used in practice for transferring buffers which
62 * are arrays of bytes, and byte-swapping is not appropriate in
63 * that case. - paulus
64 */
TsiChungLiewab77bc52007-08-15 15:39:17 -050065#define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns))
66#define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns))
67#define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
68#define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
69#define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
70#define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
TsiChung Liew8e585f02007-06-18 13:50:13 -050071
TsiChungLiewab77bc52007-08-15 15:39:17 -050072#define inb(port) in_8((u8 *)((port)+_IO_BASE))
73#define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val))
TsiChung Liew8e585f02007-06-18 13:50:13 -050074#if !defined(__BIG_ENDIAN)
TsiChungLiewab77bc52007-08-15 15:39:17 -050075#define inw(port) in_be16((u16 *)((port)+_IO_BASE))
76#define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val))
77#define inl(port) in_be32((u32 *)((port)+_IO_BASE))
78#define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val))
TsiChung Liew8e585f02007-06-18 13:50:13 -050079#else
TsiChungLiewab77bc52007-08-15 15:39:17 -050080#define inw(port) in_le16((u16 *)((port)+_IO_BASE))
81#define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val))
82#define inl(port) in_le32((u32 *)((port)+_IO_BASE))
83#define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val))
TsiChung Liew8e585f02007-06-18 13:50:13 -050084#endif
85
86extern inline void _insb(volatile u8 * port, void *buf, int ns)
Haiying Wang3a197b22007-02-21 16:52:31 +010087{
TsiChung Liew8e585f02007-06-18 13:50:13 -050088 u8 *data = (u8 *) buf;
89 while (ns--)
90 *data++ = *port;
Haiying Wang3a197b22007-02-21 16:52:31 +010091}
92
TsiChung Liew8e585f02007-06-18 13:50:13 -050093extern inline void _outsb(volatile u8 * port, const void *buf, int ns)
94{
95 u8 *data = (u8 *) buf;
96 while (ns--)
97 *port = *data++;
98}
99
100extern inline void _insw(volatile u16 * port, void *buf, int ns)
101{
102 u16 *data = (u16 *) buf;
103 while (ns--)
104 *data++ = __sw16(*port);
105}
106
107extern inline void _outsw(volatile u16 * port, const void *buf, int ns)
108{
109 u16 *data = (u16 *) buf;
110 while (ns--) {
111 *port = __sw16(*data);
112 data++;
113 }
114}
115
116extern inline void _insl(volatile u32 * port, void *buf, int nl)
117{
118 u32 *data = (u32 *) buf;
119 while (nl--)
120 *data++ = __sw32(*port);
121}
122
123extern inline void _outsl(volatile u32 * port, const void *buf, int nl)
124{
125 u32 *data = (u32 *) buf;
126 while (nl--) {
127 *port = __sw32(*data);
128 data++;
129 }
130}
131
132extern inline void _insw_ns(volatile u16 * port, void *buf, int ns)
133{
134 u16 *data = (u16 *) buf;
135 while (ns--)
136 *data++ = *port;
137}
138
139extern inline void _outsw_ns(volatile u16 * port, const void *buf, int ns)
140{
141 u16 *data = (u16 *) buf;
142 while (ns--) {
143 *port = *data++;
144 }
145}
146
147extern inline void _insl_ns(volatile u32 * port, void *buf, int nl)
148{
149 u32 *data = (u32 *) buf;
150 while (nl--)
151 *data++ = *port;
152}
153
154extern inline void _outsl_ns(volatile u32 * port, const void *buf, int nl)
155{
156 u32 *data = (u32 *) buf;
157 while (nl--) {
158 *port = *data;
159 data++;
160 }
161}
162
163/*
164 * The *_ns versions below don't do byte-swapping.
165 * Neither do the standard versions now, these are just here
166 * for older code.
167 */
TsiChungLiewab77bc52007-08-15 15:39:17 -0500168#define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
169#define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns))
170#define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
171#define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl))
TsiChung Liew8e585f02007-06-18 13:50:13 -0500172
173#define IO_SPACE_LIMIT ~0
174
175/*
176 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier.
177 */
178extern inline int in_8(volatile u8 * addr)
179{
180 return (int)*addr;
181}
182
183extern inline void out_8(volatile u8 * addr, int val)
184{
185 *addr = (u8) val;
186}
187
188extern inline int in_le16(volatile u16 * addr)
189{
190 return __sw16(*addr);
191}
192
193extern inline int in_be16(volatile u16 * addr)
194{
195 return (*addr & 0xFFFF);
196}
197
198extern inline void out_le16(volatile u16 * addr, int val)
199{
200 *addr = __sw16(val);
201}
202
203extern inline void out_be16(volatile u16 * addr, int val)
204{
205 *addr = (u16) val;
206}
207
208extern inline unsigned in_le32(volatile u32 * addr)
209{
210 return __sw32(*addr);
211}
212
213extern inline unsigned in_be32(volatile u32 * addr)
214{
215 return (*addr);
216}
217
218extern inline void out_le32(volatile unsigned *addr, int val)
219{
220 *addr = __sw32(val);
221}
222
223extern inline void out_be32(volatile unsigned *addr, int val)
224{
225 *addr = val;
226}
227
TsiChungLiew6fde84a2007-08-05 03:43:30 -0500228static inline void sync(void)
229{
230 /* This sync function is for PowerPC or other architecture instruction
231 * ColdFire does not have this instruction. Dummy function, added for
232 * compatibility (CFI driver)
233 */
234}
Haavard Skinnemoen4d7d6932007-12-13 12:56:33 +0100235
236/*
237 * Given a physical address and a length, return a virtual address
238 * that can be used to access the memory range with the caching
239 * properties specified by "flags".
240 */
241typedef unsigned long phys_addr_t;
242
243#define MAP_NOCACHE (0)
244#define MAP_WRCOMBINE (0)
245#define MAP_WRBACK (0)
246#define MAP_WRTHROUGH (0)
247
248static inline void *
249map_physmem(phys_addr_t paddr, unsigned long len, unsigned long flags)
250{
251 return (void *)paddr;
252}
253
254/*
255 * Take down a mapping set up by map_physmem().
256 */
257static inline void unmap_physmem(void *vaddr, unsigned long flags)
258{
259
260}
261
TsiChung Liew8e585f02007-06-18 13:50:13 -0500262#endif /* __ASM_M68K_IO_H__ */