arch/m68k/include/asm/raw_io.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /*
   3  * linux/include/asm-m68k/raw_io.h
   4  *
   5  * 10/20/00 RZ: - created from bits of io.h and ide.h to cleanup namespace
   6  *
   7  */
   8
   9 #ifndef _RAW_IO_H
  10 #define _RAW_IO_H
  11
  12 #ifdef __KERNEL__
  13
  14 #include <asm/byteorder.h>
  15
  16 /* ++roman: The assignments to temp. vars avoid that gcc sometimes generates
  17  * two accesses to memory, which may be undesirable for some devices.
  18  */
  19 #define in_8(addr) \
  20     ({ u8 __v = (*(__force volatile u8 *) (addr)); __v; })
  21 #define in_be16(addr) \
  22     ({ u16 __v = (*(__force volatile u16 *) (addr)); __v; })
  23 #define in_be32(addr) \
  24     ({ u32 __v = (*(__force volatile u32 *) (addr)); __v; })
  25 #define in_le16(addr) \
  26     ({ u16 __v = le16_to_cpu(*(__force volatile __le16 *) (addr)); __v; })
  27 #define in_le32(addr) \
  28     ({ u32 __v = le32_to_cpu(*(__force volatile __le32 *) (addr)); __v; })
  29
  30 #define out_8(addr,b) (void)((*(__force volatile u8 *) (addr)) = (b))
  31 #define out_be16(addr,w) (void)((*(__force volatile u16 *) (addr)) = (w))
  32 #define out_be32(addr,l) (void)((*(__force volatile u32 *) (addr)) = (l))
  33 #define out_le16(addr,w) (void)((*(__force volatile __le16 *) (addr)) = cpu_to_le16(w))
  34 #define out_le32(addr,l) (void)((*(__force volatile __le32 *) (addr)) = cpu_to_le32(l))
  35
  36 #define raw_inb in_8
  37 #define raw_inw in_be16
  38 #define raw_inl in_be32
  39 #define __raw_readb in_8
  40 #define __raw_readw in_be16
  41 #define __raw_readl in_be32
  42
  43 #define raw_outb(val,port) out_8((port),(val))
  44 #define raw_outw(val,port) out_be16((port),(val))
  45 #define raw_outl(val,port) out_be32((port),(val))
  46 #define __raw_writeb(val,addr) out_8((addr),(val))
  47 #define __raw_writew(val,addr) out_be16((addr),(val))
  48 #define __raw_writel(val,addr) out_be32((addr),(val))
  49
  50 /*
  51  * Atari ROM port (cartridge port) ISA adapter, used for the EtherNEC NE2000
  52  * network card driver.
  53  * The ISA adapter connects address lines A9-A13 to ISA address lines A0-A4,
  54  * and hardwires the rest of the ISA addresses for a base address of 0x300.
  55  *
  56  * Data lines D8-D15 are connected to ISA data lines D0-D7 for reading.
  57  * For writes, address lines A1-A8 are latched to ISA data lines D0-D7
  58  * (meaning the bit pattern on A1-A8 can be read back as byte).
  59  *
  60  * Read and write operations are distinguished by the base address used:
  61  * reads are from the ROM A side range, writes are through the B side range
  62  * addresses (A side base + 0x10000).
  63  *
  64  * Reads and writes are byte only.
  65  *
  66  * 16 bit reads and writes are necessary for the NetUSBee adapter's USB
  67  * chipset - 16 bit words are read straight off the ROM port while 16 bit
  68  * reads are split into two byte writes. The low byte is latched to the
  69  * NetUSBee buffer by a read from the _read_ window (with the data pattern
  70  * asserted as A1-A8 address pattern). The high byte is then written to the
  71  * write range as usual, completing the write cycle.
  72  */
  73
  74 #if defined(CONFIG_ATARI_ROM_ISA)
  75 #define rom_in_8(addr) \
  76         ({ u16 __v = (*(__force volatile u16 *) (addr)); __v >>= 8; __v; })
  77 #define rom_in_be16(addr) \
  78         ({ u16 __v = (*(__force volatile u16 *) (addr)); __v; })
  79 #define rom_in_le16(addr) \
  80         ({ u16 __v = le16_to_cpu(*(__force volatile u16 *) (addr)); __v; })
  81
  82 #define rom_out_8(addr, b)      \
  83         ({u8 __maybe_unused __w, __v = (b);  u32 _addr = ((u32) (addr)); \
  84         __w = ((*(__force volatile u8 *)  ((_addr | 0x10000) + (__v<<1)))); })
  85 #define rom_out_be16(addr, w)   \
  86         ({u16 __maybe_unused __w, __v = (w); u32 _addr = ((u32) (addr)); \
  87         __w = ((*(__force volatile u16 *) ((_addr & 0xFFFF0000UL) + ((__v & 0xFF)<<1)))); \
  88         __w = ((*(__force volatile u16 *) ((_addr | 0x10000) + ((__v >> 8)<<1)))); })
  89 #define rom_out_le16(addr, w)   \
  90         ({u16 __maybe_unused __w, __v = (w); u32 _addr = ((u32) (addr)); \
  91         __w = ((*(__force volatile u16 *) ((_addr & 0xFFFF0000UL) + ((__v >> 8)<<1)))); \
  92         __w = ((*(__force volatile u16 *) ((_addr | 0x10000) + ((__v & 0xFF)<<1)))); })
  93
  94 #define raw_rom_inb rom_in_8
  95 #define raw_rom_inw rom_in_be16
  96
  97 #define raw_rom_outb(val, port) rom_out_8((port), (val))
  98 #define raw_rom_outw(val, port) rom_out_be16((port), (val))
  99 #endif /* CONFIG_ATARI_ROM_ISA */
 100
 101 static inline void raw_insb(volatile u8 __iomem *port, u8 *buf, unsigned int len)
 102 {
 103         unsigned int i;
 104
 105         for (i = 0; i < len; i++)
 106                 *buf++ = in_8(port);
 107 }
 108
 109 static inline void raw_outsb(volatile u8 __iomem *port, const u8 *buf,
 110                              unsigned int nr)
 111 {
 112         unsigned int tmp;
 113
 114         if (nr & 15) {
 115                 tmp = (nr & 15) - 1;
 116                 asm volatile (
 117                         "1: moveb %0@+,%2@; dbra %1,1b"
 118                         : "=a" (buf), "=d" (tmp)
 119                         : "a" (port), "0" (buf),
 120                           "1" (tmp));
 121         }
 122         if (nr >> 4) {
 123                 tmp = (nr >> 4) - 1;
 124                 asm volatile (
 125                         "1: "
 126                         "moveb %0@+,%2@; "
 127                         "moveb %0@+,%2@; "
 128                         "moveb %0@+,%2@; "
 129                         "moveb %0@+,%2@; "
 130                         "moveb %0@+,%2@; "
 131                         "moveb %0@+,%2@; "
 132                         "moveb %0@+,%2@; "
 133                         "moveb %0@+,%2@; "
 134                         "moveb %0@+,%2@; "
 135                         "moveb %0@+,%2@; "
 136                         "moveb %0@+,%2@; "
 137                         "moveb %0@+,%2@; "
 138                         "moveb %0@+,%2@; "
 139                         "moveb %0@+,%2@; "
 140                         "moveb %0@+,%2@; "
 141                         "moveb %0@+,%2@; "
 142                         "dbra %1,1b"
 143                         : "=a" (buf), "=d" (tmp)
 144                         : "a" (port), "0" (buf),
 145                           "1" (tmp));
 146         }
 147 }
 148
 149 static inline void raw_insw(volatile u16 __iomem *port, u16 *buf, unsigned int nr)
 150 {
 151         unsigned int tmp;
 152
 153         if (nr & 15) {
 154                 tmp = (nr & 15) - 1;
 155                 asm volatile (
 156                         "1: movew %2@,%0@+; dbra %1,1b"
 157                         : "=a" (buf), "=d" (tmp)
 158                         : "a" (port), "0" (buf),
 159                           "1" (tmp));
 160         }
 161         if (nr >> 4) {
 162                 tmp = (nr >> 4) - 1;
 163                 asm volatile (
 164                         "1: "
 165                         "movew %2@,%0@+; "
 166                         "movew %2@,%0@+; "
 167                         "movew %2@,%0@+; "
 168                         "movew %2@,%0@+; "
 169                         "movew %2@,%0@+; "
 170                         "movew %2@,%0@+; "
 171                         "movew %2@,%0@+; "
 172                         "movew %2@,%0@+; "
 173                         "movew %2@,%0@+; "
 174                         "movew %2@,%0@+; "
 175                         "movew %2@,%0@+; "
 176                         "movew %2@,%0@+; "
 177                         "movew %2@,%0@+; "
 178                         "movew %2@,%0@+; "
 179                         "movew %2@,%0@+; "
 180                         "movew %2@,%0@+; "
 181                         "dbra %1,1b"
 182                         : "=a" (buf), "=d" (tmp)
 183                         : "a" (port), "0" (buf),
 184                           "1" (tmp));
 185         }
 186 }
 187
 188 static inline void raw_outsw(volatile u16 __iomem *port, const u16 *buf,
 189                              unsigned int nr)
 190 {
 191         unsigned int tmp;
 192
 193         if (nr & 15) {
 194                 tmp = (nr & 15) - 1;
 195                 asm volatile (
 196                         "1: movew %0@+,%2@; dbra %1,1b"
 197                         : "=a" (buf), "=d" (tmp)
 198                         : "a" (port), "0" (buf),
 199                           "1" (tmp));
 200         }
 201         if (nr >> 4) {
 202                 tmp = (nr >> 4) - 1;
 203                 asm volatile (
 204                         "1: "
 205                         "movew %0@+,%2@; "
 206                         "movew %0@+,%2@; "
 207                         "movew %0@+,%2@; "
 208                         "movew %0@+,%2@; "
 209                         "movew %0@+,%2@; "
 210                         "movew %0@+,%2@; "
 211                         "movew %0@+,%2@; "
 212                         "movew %0@+,%2@; "
 213                         "movew %0@+,%2@; "
 214                         "movew %0@+,%2@; "
 215                         "movew %0@+,%2@; "
 216                         "movew %0@+,%2@; "
 217                         "movew %0@+,%2@; "
 218                         "movew %0@+,%2@; "
 219                         "movew %0@+,%2@; "
 220                         "movew %0@+,%2@; "
 221                         "dbra %1,1b"
 222                         : "=a" (buf), "=d" (tmp)
 223                         : "a" (port), "0" (buf),
 224                           "1" (tmp));
 225         }
 226 }
 227
 228 static inline void raw_insl(volatile u32 __iomem *port, u32 *buf, unsigned int nr)
 229 {
 230         unsigned int tmp;
 231
 232         if (nr & 15) {
 233                 tmp = (nr & 15) - 1;
 234                 asm volatile (
 235                         "1: movel %2@,%0@+; dbra %1,1b"
 236                         : "=a" (buf), "=d" (tmp)
 237                         : "a" (port), "0" (buf),
 238                           "1" (tmp));
 239         }
 240         if (nr >> 4) {
 241                 tmp = (nr >> 4) - 1;
 242                 asm volatile (
 243                         "1: "
 244                         "movel %2@,%0@+; "
 245                         "movel %2@,%0@+; "
 246                         "movel %2@,%0@+; "
 247                         "movel %2@,%0@+; "
 248                         "movel %2@,%0@+; "
 249                         "movel %2@,%0@+; "
 250                         "movel %2@,%0@+; "
 251                         "movel %2@,%0@+; "
 252                         "movel %2@,%0@+; "
 253                         "movel %2@,%0@+; "
 254                         "movel %2@,%0@+; "
 255                         "movel %2@,%0@+; "
 256                         "movel %2@,%0@+; "
 257                         "movel %2@,%0@+; "
 258                         "movel %2@,%0@+; "
 259                         "movel %2@,%0@+; "
 260                         "dbra %1,1b"
 261                         : "=a" (buf), "=d" (tmp)
 262                         : "a" (port), "0" (buf),
 263                           "1" (tmp));
 264         }
 265 }
 266
 267 static inline void raw_outsl(volatile u32 __iomem *port, const u32 *buf,
 268                              unsigned int nr)
 269 {
 270         unsigned int tmp;
 271
 272         if (nr & 15) {
 273                 tmp = (nr & 15) - 1;
 274                 asm volatile (
 275                         "1: movel %0@+,%2@; dbra %1,1b"
 276                         : "=a" (buf), "=d" (tmp)
 277                         : "a" (port), "0" (buf),
 278                           "1" (tmp));
 279         }
 280         if (nr >> 4) {
 281                 tmp = (nr >> 4) - 1;
 282                 asm volatile (
 283                         "1: "
 284                         "movel %0@+,%2@; "
 285                         "movel %0@+,%2@; "
 286                         "movel %0@+,%2@; "
 287                         "movel %0@+,%2@; "
 288                         "movel %0@+,%2@; "
 289                         "movel %0@+,%2@; "
 290                         "movel %0@+,%2@; "
 291                         "movel %0@+,%2@; "
 292                         "movel %0@+,%2@; "
 293                         "movel %0@+,%2@; "
 294                         "movel %0@+,%2@; "
 295                         "movel %0@+,%2@; "
 296                         "movel %0@+,%2@; "
 297                         "movel %0@+,%2@; "
 298                         "movel %0@+,%2@; "
 299                         "movel %0@+,%2@; "
 300                         "dbra %1,1b"
 301                         : "=a" (buf), "=d" (tmp)
 302                         : "a" (port), "0" (buf),
 303                           "1" (tmp));
 304         }
 305 }
 306
 307
 308 static inline void raw_insw_swapw(volatile u16 __iomem *port, u16 *buf,
 309                                   unsigned int nr)
 310 {
 311     if ((nr) % 8)
 312         __asm__ __volatile__
 313                ("\tmovel %0,%/a0\n\t"
 314                 "movel %1,%/a1\n\t"
 315                 "movel %2,%/d6\n\t"
 316                 "subql #1,%/d6\n"
 317                 "1:\tmovew %/a0@,%/d0\n\t"
 318                 "rolw  #8,%/d0\n\t"
 319                 "movew %/d0,%/a1@+\n\t"
 320                 "dbra %/d6,1b"
 321                 :
 322                 : "g" (port), "g" (buf), "g" (nr)
 323                 : "d0", "a0", "a1", "d6");
 324     else
 325         __asm__ __volatile__
 326                ("movel %0,%/a0\n\t"
 327                 "movel %1,%/a1\n\t"
 328                 "movel %2,%/d6\n\t"
 329                 "lsrl  #3,%/d6\n\t"
 330                 "subql #1,%/d6\n"
 331                 "1:\tmovew %/a0@,%/d0\n\t"
 332                 "rolw  #8,%/d0\n\t"
 333                 "movew %/d0,%/a1@+\n\t"
 334                 "movew %/a0@,%/d0\n\t"
 335                 "rolw  #8,%/d0\n\t"
 336                 "movew %/d0,%/a1@+\n\t"
 337                 "movew %/a0@,%/d0\n\t"
 338                 "rolw  #8,%/d0\n\t"
 339                 "movew %/d0,%/a1@+\n\t"
 340                 "movew %/a0@,%/d0\n\t"
 341                 "rolw  #8,%/d0\n\t"
 342                 "movew %/d0,%/a1@+\n\t"
 343                 "movew %/a0@,%/d0\n\t"
 344                 "rolw  #8,%/d0\n\t"
 345                 "movew %/d0,%/a1@+\n\t"
 346                 "movew %/a0@,%/d0\n\t"
 347                 "rolw  #8,%/d0\n\t"
 348                 "movew %/d0,%/a1@+\n\t"
 349                 "movew %/a0@,%/d0\n\t"
 350                 "rolw  #8,%/d0\n\t"
 351                 "movew %/d0,%/a1@+\n\t"
 352                 "movew %/a0@,%/d0\n\t"
 353                 "rolw  #8,%/d0\n\t"
 354                 "movew %/d0,%/a1@+\n\t"
 355                 "dbra %/d6,1b"
 356                 :
 357                 : "g" (port), "g" (buf), "g" (nr)
 358                 : "d0", "a0", "a1", "d6");
 359 }
 360
 361 static inline void raw_outsw_swapw(volatile u16 __iomem *port, const u16 *buf,
 362                                    unsigned int nr)
 363 {
 364     if ((nr) % 8)
 365         __asm__ __volatile__
 366                ("movel %0,%/a0\n\t"
 367                 "movel %1,%/a1\n\t"
 368                 "movel %2,%/d6\n\t"
 369                 "subql #1,%/d6\n"
 370                 "1:\tmovew %/a1@+,%/d0\n\t"
 371                 "rolw  #8,%/d0\n\t"
 372                 "movew %/d0,%/a0@\n\t"
 373                 "dbra %/d6,1b"
 374                 :
 375                 : "g" (port), "g" (buf), "g" (nr)
 376                 : "d0", "a0", "a1", "d6");
 377     else
 378         __asm__ __volatile__
 379                ("movel %0,%/a0\n\t"
 380                 "movel %1,%/a1\n\t"
 381                 "movel %2,%/d6\n\t"
 382                 "lsrl  #3,%/d6\n\t"
 383                 "subql #1,%/d6\n"
 384                 "1:\tmovew %/a1@+,%/d0\n\t"
 385                 "rolw  #8,%/d0\n\t"
 386                 "movew %/d0,%/a0@\n\t"
 387                 "movew %/a1@+,%/d0\n\t"
 388                 "rolw  #8,%/d0\n\t"
 389                 "movew %/d0,%/a0@\n\t"
 390                 "movew %/a1@+,%/d0\n\t"
 391                 "rolw  #8,%/d0\n\t"
 392                 "movew %/d0,%/a0@\n\t"
 393                 "movew %/a1@+,%/d0\n\t"
 394                 "rolw  #8,%/d0\n\t"
 395                 "movew %/d0,%/a0@\n\t"
 396                 "movew %/a1@+,%/d0\n\t"
 397                 "rolw  #8,%/d0\n\t"
 398                 "movew %/d0,%/a0@\n\t"
 399                 "movew %/a1@+,%/d0\n\t"
 400                 "rolw  #8,%/d0\n\t"
 401                 "movew %/d0,%/a0@\n\t"
 402                 "movew %/a1@+,%/d0\n\t"
 403                 "rolw  #8,%/d0\n\t"
 404                 "movew %/d0,%/a0@\n\t"
 405                 "movew %/a1@+,%/d0\n\t"
 406                 "rolw  #8,%/d0\n\t"
 407                 "movew %/d0,%/a0@\n\t"
 408                 "dbra %/d6,1b"
 409                 :
 410                 : "g" (port), "g" (buf), "g" (nr)
 411                 : "d0", "a0", "a1", "d6");
 412 }
 413
 414
 415 #if defined(CONFIG_ATARI_ROM_ISA)
 416 static inline void raw_rom_insb(volatile u8 __iomem *port, u8 *buf, unsigned int len)
 417 {
 418         unsigned int i;
 419
 420         for (i = 0; i < len; i++)
 421                 *buf++ = rom_in_8(port);
 422 }
 423
 424 static inline void raw_rom_outsb(volatile u8 __iomem *port, const u8 *buf,
 425                              unsigned int len)
 426 {
 427         unsigned int i;
 428
 429         for (i = 0; i < len; i++)
 430                 rom_out_8(port, *buf++);
 431 }
 432
 433 static inline void raw_rom_insw(volatile u16 __iomem *port, u16 *buf,
 434                                    unsigned int nr)
 435 {
 436         unsigned int i;
 437
 438         for (i = 0; i < nr; i++)
 439                 *buf++ = rom_in_be16(port);
 440 }
 441
 442 static inline void raw_rom_outsw(volatile u16 __iomem *port, const u16 *buf,
 443                                    unsigned int nr)
 444 {
 445         unsigned int i;
 446
 447         for (i = 0; i < nr; i++)
 448                 rom_out_be16(port, *buf++);
 449 }
 450
 451 static inline void raw_rom_insw_swapw(volatile u16 __iomem *port, u16 *buf,
 452                                    unsigned int nr)
 453 {
 454         unsigned int i;
 455
 456         for (i = 0; i < nr; i++)
 457                 *buf++ = rom_in_le16(port);
 458 }
 459
 460 static inline void raw_rom_outsw_swapw(volatile u16 __iomem *port, const u16 *buf,
 461                                    unsigned int nr)
 462 {
 463         unsigned int i;
 464
 465         for (i = 0; i < nr; i++)
 466                 rom_out_le16(port, *buf++);
 467 }
 468 #endif /* CONFIG_ATARI_ROM_ISA */
 469
 470 #endif /* __KERNEL__ */
 471
 472 #endif /* _RAW_IO_H */