arch/arm/mach-s3c24xx/include/mach/io.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * arch/arm/mach-s3c2410/include/mach/io.h
   4  *  from arch/arm/mach-rpc/include/mach/io.h
   5  *
   6  * Copyright (C) 1997 Russell King
   7  *           (C) 2003 Simtec Electronics
   8 */
   9
  10 #ifndef __ASM_ARM_ARCH_IO_H
  11 #define __ASM_ARM_ARCH_IO_H
  12
  13 #include <mach/hardware.h>
  14
  15 #define IO_SPACE_LIMIT 0xffffffff
  16
  17 /*
  18  * We use two different types of addressing - PC style addresses, and ARM
  19  * addresses.  PC style accesses the PC hardware with the normal PC IO
  20  * addresses, eg 0x3f8 for serial#1.  ARM addresses are above A28
  21  * and are translated to the start of IO.  Note that all addresses are
  22  * not shifted left!
  23  */
  24
  25 #define __PORT_PCIO(x)  ((x) < (1<<28))
  26
  27 #define PCIO_BASE        (S3C24XX_VA_ISA_WORD)
  28 #define PCIO_BASE_b      (S3C24XX_VA_ISA_BYTE)
  29 #define PCIO_BASE_w      (S3C24XX_VA_ISA_WORD)
  30 #define PCIO_BASE_l      (S3C24XX_VA_ISA_WORD)
  31 /*
  32  * Dynamic IO functions - let the compiler
  33  * optimize the expressions
  34  */
  35
  36 #define DECLARE_DYN_OUT(sz,fnsuffix,instr) \
  37 static inline void __out##fnsuffix (unsigned int val, unsigned int port) \
  38 { \
  39         unsigned long temp;                                   \
  40         __asm__ __volatile__(                                 \
  41         "cmp    %2, #(1<<28)\n\t"                             \
  42         "mov    %0, %2\n\t"                                   \
  43         "addcc  %0, %0, %3\n\t"                               \
  44         "str" instr " %1, [%0, #0 ]     @ out" #fnsuffix      \
  45         : "=&r" (temp)                                        \
  46         : "r" (val), "r" (port), "Ir" (PCIO_BASE_##fnsuffix)  \
  47         : "cc");                                              \
  48 }
  49
  50
  51 #define DECLARE_DYN_IN(sz,fnsuffix,instr)                               \
  52 static inline unsigned sz __in##fnsuffix (unsigned int port)            \
  53 {                                                                       \
  54         unsigned long temp, value;                                      \
  55         __asm__ __volatile__(                                           \
  56         "cmp    %2, #(1<<28)\n\t"                                       \
  57         "mov    %0, %2\n\t"                                             \
  58         "addcc  %0, %0, %3\n\t"                                         \
  59         "ldr" instr "   %1, [%0, #0 ]   @ in" #fnsuffix         \
  60         : "=&r" (temp), "=r" (value)                                    \
  61         : "r" (port), "Ir" (PCIO_BASE_##fnsuffix)       \
  62         : "cc");                                                        \
  63         return (unsigned sz)value;                                      \
  64 }
  65
  66 static inline void __iomem *__ioaddr (unsigned long port)
  67 {
  68         return __PORT_PCIO(port) ? (PCIO_BASE + port) : (void __iomem *)port;
  69 }
  70
  71 #define DECLARE_IO(sz,fnsuffix,instr)   \
  72         DECLARE_DYN_IN(sz,fnsuffix,instr) \
  73         DECLARE_DYN_OUT(sz,fnsuffix,instr)
  74
  75 DECLARE_IO(char,b,"b")
  76 DECLARE_IO(short,w,"h")
  77 DECLARE_IO(int,l,"")
  78
  79 #undef DECLARE_IO
  80 #undef DECLARE_DYN_IN
  81
  82 /*
  83  * Constant address IO functions
  84  *
  85  * These have to be macros for the 'J' constraint to work -
  86  * +/-4096 immediate operand.
  87  */
  88 #define __outbc(value,port)                                             \
  89 ({                                                                      \
  90         if (__PORT_PCIO((port)))                                        \
  91                 __asm__ __volatile__(                                   \
  92                 "strb   %0, [%1, %2]    @ outbc"                        \
  93                 : : "r" (value), "r" (PCIO_BASE), "Jr" ((port)));       \
  94         else                                                            \
  95                 __asm__ __volatile__(                                   \
  96                 "strb   %0, [%1, #0]    @ outbc"                        \
  97                 : : "r" (value), "r" ((port)));                         \
  98 })
  99
 100 #define __inbc(port)                                                    \
 101 ({                                                                      \
 102         unsigned char result;                                           \
 103         if (__PORT_PCIO((port)))                                        \
 104                 __asm__ __volatile__(                                   \
 105                 "ldrb   %0, [%1, %2]    @ inbc"                         \
 106                 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port)));      \
 107         else                                                            \
 108                 __asm__ __volatile__(                                   \
 109                 "ldrb   %0, [%1, #0]    @ inbc"                         \
 110                 : "=r" (result) : "r" ((port)));                        \
 111         result;                                                         \
 112 })
 113
 114 #define __outwc(value,port)                                             \
 115 ({                                                                      \
 116         unsigned long v = value;                                        \
 117         if (__PORT_PCIO((port))) {                                      \
 118                 if ((port) < 256 && (port) > -256)                      \
 119                         __asm__ __volatile__(                           \
 120                         "strh   %0, [%1, %2]    @ outwc"                \
 121                         : : "r" (v), "r" (PCIO_BASE), "Jr" ((port)));   \
 122                 else if ((port) > 0)                                    \
 123                         __asm__ __volatile__(                           \
 124                         "strh   %0, [%1, %2]    @ outwc"                \
 125                         : : "r" (v),                                    \
 126                             "r" (PCIO_BASE + ((port) & ~0xff)),         \
 127                              "Jr" (((port) & 0xff)));                   \
 128                 else                                                    \
 129                         __asm__ __volatile__(                           \
 130                         "strh   %0, [%1, #0]    @ outwc"                \
 131                         : : "r" (v),                                    \
 132                             "r" (PCIO_BASE + (port)));                  \
 133         } else                                                          \
 134                 __asm__ __volatile__(                                   \
 135                 "strh   %0, [%1, #0]    @ outwc"                        \
 136                 : : "r" (v), "r" ((port)));                             \
 137 })
 138
 139 #define __inwc(port)                                                    \
 140 ({                                                                      \
 141         unsigned short result;                                          \
 142         if (__PORT_PCIO((port))) {                                      \
 143                 if ((port) < 256 && (port) > -256 )                     \
 144                         __asm__ __volatile__(                           \
 145                         "ldrh   %0, [%1, %2]    @ inwc"                 \
 146                         : "=r" (result)                                 \
 147                         : "r" (PCIO_BASE),                              \
 148                           "Jr" ((port)));                               \
 149                 else if ((port) > 0)                                    \
 150                         __asm__ __volatile__(                           \
 151                         "ldrh   %0, [%1, %2]    @ inwc"                 \
 152                         : "=r" (result)                                 \
 153                         : "r" (PCIO_BASE + ((port) & ~0xff)),           \
 154                           "Jr" (((port) & 0xff)));                      \
 155                 else                                                    \
 156                         __asm__ __volatile__(                           \
 157                         "ldrh   %0, [%1, #0]    @ inwc"                 \
 158                         : "=r" (result)                                 \
 159                         : "r" (PCIO_BASE + ((port))));                  \
 160         } else                                                          \
 161                 __asm__ __volatile__(                                   \
 162                 "ldrh   %0, [%1, #0]    @ inwc"                         \
 163                 : "=r" (result) : "r" ((port)));                        \
 164         result;                                                         \
 165 })
 166
 167 #define __outlc(value,port)                                             \
 168 ({                                                                      \
 169         unsigned long v = value;                                        \
 170         if (__PORT_PCIO((port)))                                        \
 171                 __asm__ __volatile__(                                   \
 172                 "str    %0, [%1, %2]    @ outlc"                        \
 173                 : : "r" (v), "r" (PCIO_BASE), "Jr" ((port)));   \
 174         else                                                            \
 175                 __asm__ __volatile__(                                   \
 176                 "str    %0, [%1, #0]    @ outlc"                        \
 177                 : : "r" (v), "r" ((port)));             \
 178 })
 179
 180 #define __inlc(port)                                                    \
 181 ({                                                                      \
 182         unsigned long result;                                           \
 183         if (__PORT_PCIO((port)))                                        \
 184                 __asm__ __volatile__(                                   \
 185                 "ldr    %0, [%1, %2]    @ inlc"                         \
 186                 : "=r" (result) : "r" (PCIO_BASE), "Jr" ((port)));      \
 187         else                                                            \
 188                 __asm__ __volatile__(                                   \
 189                 "ldr    %0, [%1, #0]    @ inlc"                         \
 190                 : "=r" (result) : "r" ((port)));                \
 191         result;                                                         \
 192 })
 193
 194 #define __ioaddrc(port) ((__PORT_PCIO(port) ? PCIO_BASE + (port) : (void __iomem *)0 + (port)))
 195
 196 #define inb(p)          (__builtin_constant_p((p)) ? __inbc(p)     : __inb(p))
 197 #define inw(p)          (__builtin_constant_p((p)) ? __inwc(p)     : __inw(p))
 198 #define inl(p)          (__builtin_constant_p((p)) ? __inlc(p)     : __inl(p))
 199 #define outb(v,p)       (__builtin_constant_p((p)) ? __outbc(v,p) : __outb(v,p))
 200 #define outw(v,p)       (__builtin_constant_p((p)) ? __outwc(v,p) : __outw(v,p))
 201 #define outl(v,p)       (__builtin_constant_p((p)) ? __outlc(v,p) : __outl(v,p))
 202 #define __ioaddr(p)     (__builtin_constant_p((p)) ? __ioaddr(p)  : __ioaddrc(p))
 203
 204 #define insb(p,d,l)     __raw_readsb(__ioaddr(p),d,l)
 205 #define insw(p,d,l)     __raw_readsw(__ioaddr(p),d,l)
 206 #define insl(p,d,l)     __raw_readsl(__ioaddr(p),d,l)
 207
 208 #define outsb(p,d,l)    __raw_writesb(__ioaddr(p),d,l)
 209 #define outsw(p,d,l)    __raw_writesw(__ioaddr(p),d,l)
 210 #define outsl(p,d,l)    __raw_writesl(__ioaddr(p),d,l)
 211
 212 #endif