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[SERIAL] Update serial driver documentation
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / include / asm-arm / arch-cl7500 / io.h
blob89a33287f4fe6159aa56bbf54ecbc771ea7934b5
1 /*
2 * linux/include/asm-arm/arch-cl7500/io.h
3 * from linux/include/asm-arm/arch-rpc/io.h
4 *
5 * Copyright (C) 1997 Russell King
6 *
7 * Modifications:
8 * 06-Dec-1997 RMK Created.
9 */
10 #ifndef __ASM_ARM_ARCH_IO_H
11 #define __ASM_ARM_ARCH_IO_H
12
13 #include <asm/hardware.h>
14
15 #define IO_SPACE_LIMIT 0xffffffff
16
17 /*
18 * GCC is totally crap at loading/storing data. We try to persuade it
19 * to do the right thing by using these whereever possible instead of
20 * the above.
21 */
22 #define __arch_base_getb(b,o) \
23 ({ \
24 unsigned int v, r = (b); \
25 __asm__ __volatile__( \
26 "ldrb %0, [%1, %2]" \
27 : "=r" (v) \
28 : "r" (r), "Ir" (o)); \
29 v; \
30 })
31
32 #define __arch_base_getl(b,o) \
33 ({ \
34 unsigned int v, r = (b); \
35 __asm__ __volatile__( \
36 "ldr %0, [%1, %2]" \
37 : "=r" (v) \
38 : "r" (r), "Ir" (o)); \
39 v; \
40 })
41
42 #define __arch_base_putb(v,b,o) \
43 ({ \
44 unsigned int r = (b); \
45 __asm__ __volatile__( \
46 "strb %0, [%1, %2]" \
47 : \
48 : "r" (v), "r" (r), "Ir" (o)); \
49 })
50
51 #define __arch_base_putl(v,b,o) \
52 ({ \
53 unsigned int r = (b); \
54 __asm__ __volatile__( \
55 "str %0, [%1, %2]" \
56 : \
57 : "r" (v), "r" (r), "Ir" (o)); \
58 })
59
60 /*
61 * We use two different types of addressing - PC style addresses, and ARM
62 * addresses. PC style accesses the PC hardware with the normal PC IO
63 * addresses, eg 0x3f8 for serial#1. ARM addresses are 0x80000000+
64 * and are translated to the start of IO. Note that all addresses are
65 * shifted left!
66 */
67 #define __PORT_PCIO(x) (!((x) & 0x80000000))
68
69 /*
70 * Dynamic IO functions - let the compiler
71 * optimize the expressions
72 */
73 static inline void __outb (unsigned int value, unsigned int port)
74 {
75 unsigned long temp;
76 __asm__ __volatile__(
77 "tst %2, #0x80000000\n\t"
78 "mov %0, %4\n\t"
79 "addeq %0, %0, %3\n\t"
80 "strb %1, [%0, %2, lsl #2] @ outb"
81 : "=&r" (temp)
82 : "r" (value), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)
83 : "cc");
84 }
85
86 static inline void __outw (unsigned int value, unsigned int port)
87 {
88 unsigned long temp;
89 __asm__ __volatile__(
90 "tst %2, #0x80000000\n\t"
91 "mov %0, %4\n\t"
92 "addeq %0, %0, %3\n\t"
93 "str %1, [%0, %2, lsl #2] @ outw"
94 : "=&r" (temp)
95 : "r" (value|value<<16), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)
96 : "cc");
97 }
98
99 static inline void __outl (unsigned int value, unsigned int port)
100 {
101 unsigned long temp;
102 __asm__ __volatile__(
103 "tst %2, #0x80000000\n\t"
104 "mov %0, %4\n\t"
105 "addeq %0, %0, %3\n\t"
106 "str %1, [%0, %2, lsl #2] @ outl"
107 : "=&r" (temp)
108 : "r" (value), "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE)
109 : "cc");
110 }
111
112 #define DECLARE_DYN_IN(sz,fnsuffix,instr) \
113 static inline unsigned sz __in##fnsuffix (unsigned int port) \
114 { \
115 unsigned long temp, value; \
116 __asm__ __volatile__( \
117 "tst %2, #0x80000000\n\t" \
118 "mov %0, %4\n\t" \
119 "addeq %0, %0, %3\n\t" \
120 "ldr" instr " %1, [%0, %2, lsl #2] @ in" #fnsuffix \
121 : "=&r" (temp), "=r" (value) \
122 : "r" (port), "Ir" (PCIO_BASE - IO_BASE), "Ir" (IO_BASE) \
123 : "cc"); \
124 return (unsigned sz)value; \
125 }
126
127 static inline unsigned int __ioaddr (unsigned int port) \
128 { \
129 if (__PORT_PCIO(port)) \
130 return (unsigned int)(PCIO_BASE + (port << 2)); \
131 else \
132 return (unsigned int)(IO_BASE + (port << 2)); \
133 }
134
135 #define DECLARE_IO(sz,fnsuffix,instr) \
136 DECLARE_DYN_IN(sz,fnsuffix,instr)
137
138 DECLARE_IO(char,b,"b")
139 DECLARE_IO(short,w,"")
140 DECLARE_IO(int,l,"")
141
142 #undef DECLARE_IO
143 #undef DECLARE_DYN_IN
144
145 /*
146 * Constant address IO functions
147 *
148 * These have to be macros for the 'J' constraint to work -
149 * +/-4096 immediate operand.
150 */
151 #define __outbc(value,port) \
152 ({ \
153 if (__PORT_PCIO((port))) \
154 __asm__ __volatile__( \
155 "strb %0, [%1, %2] @ outbc" \
156 : : "r" (value), "r" (PCIO_BASE), "Jr" ((port) << 2)); \
157 else \
158 __asm__ __volatile__( \
159 "strb %0, [%1, %2] @ outbc" \
160 : : "r" (value), "r" (IO_BASE), "r" ((port) << 2)); \
161 })
162
163 #define __inbc(port) \
164 ({ \
165 unsigned char result; \
166 if (__PORT_PCIO((port))) \
167 __asm__ __volatile__( \
168 "ldrb %0, [%1, %2] @ inbc" \
169 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2)); \
170 else \
171 __asm__ __volatile__( \
172 "ldrb %0, [%1, %2] @ inbc" \
173 : "=r" (result) : "r" (IO_BASE), "r" ((port) << 2)); \
174 result; \
175 })
176
177 #define __outwc(value,port) \
178 ({ \
179 unsigned long v = value; \
180 if (__PORT_PCIO((port))) \
181 __asm__ __volatile__( \
182 "str %0, [%1, %2] @ outwc" \
183 : : "r" (v|v<<16), "r" (PCIO_BASE), "Jr" ((port) << 2)); \
184 else \
185 __asm__ __volatile__( \
186 "str %0, [%1, %2] @ outwc" \
187 : : "r" (v|v<<16), "r" (IO_BASE), "r" ((port) << 2)); \
188 })
189
190 #define __inwc(port) \
191 ({ \
192 unsigned short result; \
193 if (__PORT_PCIO((port))) \
194 __asm__ __volatile__( \
195 "ldr %0, [%1, %2] @ inwc" \
196 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2)); \
197 else \
198 __asm__ __volatile__( \
199 "ldr %0, [%1, %2] @ inwc" \
200 : "=r" (result) : "r" (IO_BASE), "r" ((port) << 2)); \
201 result & 0xffff; \
202 })
203
204 #define __outlc(value,port) \
205 ({ \
206 unsigned long v = value; \
207 if (__PORT_PCIO((port))) \
208 __asm__ __volatile__( \
209 "str %0, [%1, %2] @ outlc" \
210 : : "r" (v), "r" (PCIO_BASE), "Jr" ((port) << 2)); \
211 else \
212 __asm__ __volatile__( \
213 "str %0, [%1, %2] @ outlc" \
214 : : "r" (v), "r" (IO_BASE), "r" ((port) << 2)); \
215 })
216
217 #define __inlc(port) \
218 ({ \
219 unsigned long result; \
220 if (__PORT_PCIO((port))) \
221 __asm__ __volatile__( \
222 "ldr %0, [%1, %2] @ inlc" \
223 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port) << 2)); \
224 else \
225 __asm__ __volatile__( \
226 "ldr %0, [%1, %2] @ inlc" \
227 : "=r" (result) : "r" (IO_BASE), "r" ((port) << 2)); \
228 result; \
229 })
230
231 #define __ioaddrc(port) \
232 (__PORT_PCIO((port)) ? PCIO_BASE + ((port) << 2) : IO_BASE + ((port) << 2))
233
234 #define inb(p) (__builtin_constant_p((p)) ? __inbc(p) : __inb(p))
235 #define inw(p) (__builtin_constant_p((p)) ? __inwc(p) : __inw(p))
236 #define inl(p) (__builtin_constant_p((p)) ? __inlc(p) : __inl(p))
237 #define outb(v,p) (__builtin_constant_p((p)) ? __outbc(v,p) : __outb(v,p))
238 #define outw(v,p) (__builtin_constant_p((p)) ? __outwc(v,p) : __outw(v,p))
239 #define outl(v,p) (__builtin_constant_p((p)) ? __outlc(v,p) : __outl(v,p))
240 #define __ioaddr(p) (__builtin_constant_p((p)) ? __ioaddr(p) : __ioaddrc(p))
241 /* the following macro is deprecated */
242 #define ioaddr(port) __ioaddr((port))
243
244 #define insb(p,d,l) __raw_readsb(__ioaddr(p),d,l)
245 #define insw(p,d,l) __raw_readsw(__ioaddr(p),d,l)
246
247 #define outsb(p,d,l) __raw_writesb(__ioaddr(p),d,l)
248 #define outsw(p,d,l) __raw_writesw(__ioaddr(p),d,l)
249
250 /*
251 * 1:1 mapping for ioremapped regions.
252 */
253 #define __mem_pci(x) (x)
254
255 #endif
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