1 /* 2 * IO header file 3 * 4 * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc. 5 * TsiChung Liew (Tsi-Chung.Liew@freescale.com) 6 * 7 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #ifndef __ASM_M68K_IO_H__ 11 #define __ASM_M68K_IO_H__ 12 13 #include <asm/byteorder.h> 14 15 #ifndef _IO_BASE 16 #define _IO_BASE 0 17 #endif 18 19 #define __raw_readb(addr) (*(volatile u8 *)(addr)) 20 #define __raw_readw(addr) (*(volatile u16 *)(addr)) 21 #define __raw_readl(addr) (*(volatile u32 *)(addr)) 22 23 #define __raw_writeb(b,addr) ((*(volatile u8 *) (addr)) = (b)) 24 #define __raw_writew(w,addr) ((*(volatile u16 *) (addr)) = (w)) 25 #define __raw_writel(l,addr) ((*(volatile u32 *) (addr)) = (l)) 26 27 #define readb(addr) in_8((volatile u8 *)(addr)) 28 #define writeb(b,addr) out_8((volatile u8 *)(addr), (b)) 29 #if !defined(__BIG_ENDIAN) 30 #define readw(addr) (*(volatile u16 *) (addr)) 31 #define readl(addr) (*(volatile u32 *) (addr)) 32 #define writew(b,addr) ((*(volatile u16 *) (addr)) = (b)) 33 #define writel(b,addr) ((*(volatile u32 *) (addr)) = (b)) 34 #else 35 #define readw(addr) in_be16((volatile u16 *)(addr)) 36 #define readl(addr) in_be32((volatile u32 *)(addr)) 37 #define writew(b,addr) out_be16((volatile u16 *)(addr),(b)) 38 #define writel(b,addr) out_be32((volatile u32 *)(addr),(b)) 39 #endif 40 41 /* 42 * The insw/outsw/insl/outsl macros don't do byte-swapping. 43 * They are only used in practice for transferring buffers which 44 * are arrays of bytes, and byte-swapping is not appropriate in 45 * that case. - paulus 46 */ 47 #define insb(port, buf, ns) _insb((u8 *)((port)+_IO_BASE), (buf), (ns)) 48 #define outsb(port, buf, ns) _outsb((u8 *)((port)+_IO_BASE), (buf), (ns)) 49 #define insw(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) 50 #define outsw(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) 51 #define insl(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) 52 #define outsl(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) 53 54 #define inb(port) in_8((u8 *)((port)+_IO_BASE)) 55 #define outb(val, port) out_8((u8 *)((port)+_IO_BASE), (val)) 56 #if !defined(__BIG_ENDIAN) 57 #define inw(port) in_be16((u16 *)((port)+_IO_BASE)) 58 #define outw(val, port) out_be16((u16 *)((port)+_IO_BASE), (val)) 59 #define inl(port) in_be32((u32 *)((port)+_IO_BASE)) 60 #define outl(val, port) out_be32((u32 *)((port)+_IO_BASE), (val)) 61 #else 62 #define inw(port) in_le16((u16 *)((port)+_IO_BASE)) 63 #define outw(val, port) out_le16((u16 *)((port)+_IO_BASE), (val)) 64 #define inl(port) in_le32((u32 *)((port)+_IO_BASE)) 65 #define outl(val, port) out_le32((u32 *)((port)+_IO_BASE), (val)) 66 #endif 67 68 #define mb() __asm__ __volatile__ ("" : : : "memory") 69 70 static inline void _insb(volatile u8 * port, void *buf, int ns) 71 { 72 u8 *data = (u8 *) buf; 73 while (ns--) 74 *data++ = *port; 75 } 76 77 static inline void _outsb(volatile u8 * port, const void *buf, int ns) 78 { 79 u8 *data = (u8 *) buf; 80 while (ns--) 81 *port = *data++; 82 } 83 84 static inline void _insw(volatile u16 * port, void *buf, int ns) 85 { 86 u16 *data = (u16 *) buf; 87 while (ns--) 88 *data++ = __sw16(*port); 89 } 90 91 static inline void _outsw(volatile u16 * port, const void *buf, int ns) 92 { 93 u16 *data = (u16 *) buf; 94 while (ns--) { 95 *port = __sw16(*data); 96 data++; 97 } 98 } 99 100 static inline void _insl(volatile u32 * port, void *buf, int nl) 101 { 102 u32 *data = (u32 *) buf; 103 while (nl--) 104 *data++ = __sw32(*port); 105 } 106 107 static inline void _outsl(volatile u32 * port, const void *buf, int nl) 108 { 109 u32 *data = (u32 *) buf; 110 while (nl--) { 111 *port = __sw32(*data); 112 data++; 113 } 114 } 115 116 static inline void _insw_ns(volatile u16 * port, void *buf, int ns) 117 { 118 u16 *data = (u16 *) buf; 119 while (ns--) 120 *data++ = *port; 121 } 122 123 static inline void _outsw_ns(volatile u16 * port, const void *buf, int ns) 124 { 125 u16 *data = (u16 *) buf; 126 while (ns--) { 127 *port = *data++; 128 } 129 } 130 131 static inline void _insl_ns(volatile u32 * port, void *buf, int nl) 132 { 133 u32 *data = (u32 *) buf; 134 while (nl--) 135 *data++ = *port; 136 } 137 138 static inline void _outsl_ns(volatile u32 * port, const void *buf, int nl) 139 { 140 u32 *data = (u32 *) buf; 141 while (nl--) { 142 *port = *data; 143 data++; 144 } 145 } 146 147 /* 148 * The *_ns versions below don't do byte-swapping. 149 * Neither do the standard versions now, these are just here 150 * for older code. 151 */ 152 #define insw_ns(port, buf, ns) _insw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) 153 #define outsw_ns(port, buf, ns) _outsw_ns((u16 *)((port)+_IO_BASE), (buf), (ns)) 154 #define insl_ns(port, buf, nl) _insl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) 155 #define outsl_ns(port, buf, nl) _outsl_ns((u32 *)((port)+_IO_BASE), (buf), (nl)) 156 157 #define IO_SPACE_LIMIT ~0 158 159 /* 160 * 8, 16 and 32 bit, big and little endian I/O operations, with barrier. 161 */ 162 static inline int in_8(volatile u8 * addr) 163 { 164 return (int)*addr; 165 } 166 167 static inline void out_8(volatile u8 * addr, int val) 168 { 169 *addr = (u8) val; 170 } 171 172 static inline int in_le16(volatile u16 * addr) 173 { 174 return __sw16(*addr); 175 } 176 177 static inline int in_be16(volatile u16 * addr) 178 { 179 return (*addr & 0xFFFF); 180 } 181 182 static inline void out_le16(volatile u16 * addr, int val) 183 { 184 *addr = __sw16(val); 185 } 186 187 static inline void out_be16(volatile u16 * addr, int val) 188 { 189 *addr = (u16) val; 190 } 191 192 static inline unsigned in_le32(volatile u32 * addr) 193 { 194 return __sw32(*addr); 195 } 196 197 static inline unsigned in_be32(volatile u32 * addr) 198 { 199 return (*addr); 200 } 201 202 static inline void out_le32(volatile unsigned *addr, int val) 203 { 204 *addr = __sw32(val); 205 } 206 207 static inline void out_be32(volatile unsigned *addr, int val) 208 { 209 *addr = val; 210 } 211 212 /* Clear and set bits in one shot. These macros can be used to clear and 213 * set multiple bits in a register using a single call. These macros can 214 * also be used to set a multiple-bit bit pattern using a mask, by 215 * specifying the mask in the 'clear' parameter and the new bit pattern 216 * in the 'set' parameter. 217 */ 218 219 #define clrbits(type, addr, clear) \ 220 out_##type((addr), in_##type(addr) & ~(clear)) 221 222 #define setbits(type, addr, set) \ 223 out_##type((addr), in_##type(addr) | (set)) 224 225 #define clrsetbits(type, addr, clear, set) \ 226 out_##type((addr), (in_##type(addr) & ~(clear)) | (set)) 227 228 #define clrbits_be32(addr, clear) clrbits(be32, addr, clear) 229 #define setbits_be32(addr, set) setbits(be32, addr, set) 230 #define clrsetbits_be32(addr, clear, set) clrsetbits(be32, addr, clear, set) 231 232 #define clrbits_le32(addr, clear) clrbits(le32, addr, clear) 233 #define setbits_le32(addr, set) setbits(le32, addr, set) 234 #define clrsetbits_le32(addr, clear, set) clrsetbits(le32, addr, clear, set) 235 236 #define clrbits_be16(addr, clear) clrbits(be16, addr, clear) 237 #define setbits_be16(addr, set) setbits(be16, addr, set) 238 #define clrsetbits_be16(addr, clear, set) clrsetbits(be16, addr, clear, set) 239 240 #define clrbits_le16(addr, clear) clrbits(le16, addr, clear) 241 #define setbits_le16(addr, set) setbits(le16, addr, set) 242 #define clrsetbits_le16(addr, clear, set) clrsetbits(le16, addr, clear, set) 243 244 #define clrbits_8(addr, clear) clrbits(8, addr, clear) 245 #define setbits_8(addr, set) setbits(8, addr, set) 246 #define clrsetbits_8(addr, clear, set) clrsetbits(8, addr, clear, set) 247 248 static inline void sync(void) 249 { 250 /* This sync function is for PowerPC or other architecture instruction 251 * ColdFire does not have this instruction. Dummy function, added for 252 * compatibility (CFI driver) 253 */ 254 } 255 256 /* 257 * Given a physical address and a length, return a virtual address 258 * that can be used to access the memory range with the caching 259 * properties specified by "flags". 260 */ 261 #define MAP_NOCACHE (0) 262 #define MAP_WRCOMBINE (0) 263 #define MAP_WRBACK (0) 264 #define MAP_WRTHROUGH (0) 265 266 static inline void *map_physmem(phys_addr_t paddr, unsigned long len, 267 unsigned long flags) 268 { 269 return (void *)paddr; 270 } 271 272 /* 273 * Take down a mapping set up by map_physmem(). 274 */ 275 static inline void unmap_physmem(void *vaddr, unsigned long flags) 276 { 277 278 } 279 280 static inline phys_addr_t virt_to_phys(void * vaddr) 281 { 282 return (phys_addr_t)(vaddr); 283 } 284 285 #endif /* __ASM_M68K_IO_H__ */ 286