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
_insb(volatile u8 * port,void * buf,int ns)69 static inline void _insb(volatile u8 * port, void *buf, int ns)
70 {
71 u8 *data = (u8 *) buf;
72 while (ns--)
73 *data++ = *port;
74 }
75
_outsb(volatile u8 * port,const void * buf,int ns)76 static 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
_insw(volatile u16 * port,void * buf,int ns)83 static 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
_outsw(volatile u16 * port,const void * buf,int ns)90 static 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
_insl(volatile u32 * port,void * buf,int nl)99 static 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
_outsl(volatile u32 * port,const void * buf,int nl)106 static 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
_insw_ns(volatile u16 * port,void * buf,int ns)115 static 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
_outsw_ns(volatile u16 * port,const void * buf,int ns)122 static 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
_insl_ns(volatile u32 * port,void * buf,int nl)130 static 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
_outsl_ns(volatile u32 * port,const void * buf,int nl)137 static 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 */
in_8(volatile u8 * addr)161 static inline int in_8(volatile u8 * addr)
162 {
163 return (int)*addr;
164 }
165
out_8(volatile u8 * addr,int val)166 static inline void out_8(volatile u8 * addr, int val)
167 {
168 *addr = (u8) val;
169 }
170
in_le16(volatile u16 * addr)171 static inline int in_le16(volatile u16 * addr)
172 {
173 return __sw16(*addr);
174 }
175
in_be16(volatile u16 * addr)176 static inline int in_be16(volatile u16 * addr)
177 {
178 return (*addr & 0xFFFF);
179 }
180
out_le16(volatile u16 * addr,int val)181 static inline void out_le16(volatile u16 * addr, int val)
182 {
183 *addr = __sw16(val);
184 }
185
out_be16(volatile u16 * addr,int val)186 static inline void out_be16(volatile u16 * addr, int val)
187 {
188 *addr = (u16) val;
189 }
190
in_le32(volatile u32 * addr)191 static inline unsigned in_le32(volatile u32 * addr)
192 {
193 return __sw32(*addr);
194 }
195
in_be32(volatile u32 * addr)196 static inline unsigned in_be32(volatile u32 * addr)
197 {
198 return (*addr);
199 }
200
out_le32(volatile unsigned * addr,int val)201 static inline void out_le32(volatile unsigned *addr, int val)
202 {
203 *addr = __sw32(val);
204 }
205
out_be32(volatile unsigned * addr,int val)206 static 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
sync(void)247 static 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