LXR linux/arch/m68k/include/asm/raw

   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 __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 __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 __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
 101static 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
 109static inline void raw_outsb(volatile u8 __iomem *port, const u8 *buf,
 110                             unsigned int len)
 111{
 112        unsigned int i;
 113
 114        for (i = 0; i < len; i++)
 115                out_8(port, *buf++);
 116}
 117
 118static inline void raw_insw(volatile u16 __iomem *port, u16 *buf, unsigned int nr)
 119{
 120        unsigned int tmp;
 121
 122        if (nr & 15) {
 123                tmp = (nr & 15) - 1;
 124                asm volatile (
 125                        "1: movew %2@,%0@+; dbra %1,1b"
 126                        : "=a" (buf), "=d" (tmp)
 127                        : "a" (port), "0" (buf),
 128                          "1" (tmp));
 129        }
 130        if (nr >> 4) {
 131                tmp = (nr >> 4) - 1;
 132                asm volatile (
 133                        "1: "
 134                        "movew %2@,%0@+; "
 135                        "movew %2@,%0@+; "
 136                        "movew %2@,%0@+; "
 137                        "movew %2@,%0@+; "
 138                        "movew %2@,%0@+; "
 139                        "movew %2@,%0@+; "
 140                        "movew %2@,%0@+; "
 141                        "movew %2@,%0@+; "
 142                        "movew %2@,%0@+; "
 143                        "movew %2@,%0@+; "
 144                        "movew %2@,%0@+; "
 145                        "movew %2@,%0@+; "
 146                        "movew %2@,%0@+; "
 147                        "movew %2@,%0@+; "
 148                        "movew %2@,%0@+; "
 149                        "movew %2@,%0@+; "
 150                        "dbra %1,1b"
 151                        : "=a" (buf), "=d" (tmp)
 152                        : "a" (port), "0" (buf),
 153                          "1" (tmp));
 154        }
 155}
 156
 157static inline void raw_outsw(volatile u16 __iomem *port, const u16 *buf,
 158                             unsigned int nr)
 159{
 160        unsigned int tmp;
 161
 162        if (nr & 15) {
 163                tmp = (nr & 15) - 1;
 164                asm volatile (
 165                        "1: movew %0@+,%2@; dbra %1,1b"
 166                        : "=a" (buf), "=d" (tmp)
 167                        : "a" (port), "0" (buf),
 168                          "1" (tmp));
 169        }
 170        if (nr >> 4) {
 171                tmp = (nr >> 4) - 1;
 172                asm volatile (
 173                        "1: "
 174                        "movew %0@+,%2@; "
 175                        "movew %0@+,%2@; "
 176                        "movew %0@+,%2@; "
 177                        "movew %0@+,%2@; "
 178                        "movew %0@+,%2@; "
 179                        "movew %0@+,%2@; "
 180                        "movew %0@+,%2@; "
 181                        "movew %0@+,%2@; "
 182                        "movew %0@+,%2@; "
 183                        "movew %0@+,%2@; "
 184                        "movew %0@+,%2@; "
 185                        "movew %0@+,%2@; "
 186                        "movew %0@+,%2@; "
 187                        "movew %0@+,%2@; "
 188                        "movew %0@+,%2@; "
 189                        "movew %0@+,%2@; "
 190                        "dbra %1,1b"
 191                        : "=a" (buf), "=d" (tmp)
 192                        : "a" (port), "0" (buf),
 193                          "1" (tmp));
 194        }
 195}
 196
 197static inline void raw_insl(volatile u32 __iomem *port, u32 *buf, unsigned int nr)
 198{
 199        unsigned int tmp;
 200
 201        if (nr & 15) {
 202                tmp = (nr & 15) - 1;
 203                asm volatile (
 204                        "1: movel %2@,%0@+; dbra %1,1b"
 205                        : "=a" (buf), "=d" (tmp)
 206                        : "a" (port), "0" (buf),
 207                          "1" (tmp));
 208        }
 209        if (nr >> 4) {
 210                tmp = (nr >> 4) - 1;
 211                asm volatile (
 212                        "1: "
 213                        "movel %2@,%0@+; "
 214                        "movel %2@,%0@+; "
 215                        "movel %2@,%0@+; "
 216                        "movel %2@,%0@+; "
 217                        "movel %2@,%0@+; "
 218                        "movel %2@,%0@+; "
 219                        "movel %2@,%0@+; "
 220                        "movel %2@,%0@+; "
 221                        "movel %2@,%0@+; "
 222                        "movel %2@,%0@+; "
 223                        "movel %2@,%0@+; "
 224                        "movel %2@,%0@+; "
 225                        "movel %2@,%0@+; "
 226                        "movel %2@,%0@+; "
 227                        "movel %2@,%0@+; "
 228                        "movel %2@,%0@+; "
 229                        "dbra %1,1b"
 230                        : "=a" (buf), "=d" (tmp)
 231                        : "a" (port), "0" (buf),
 232                          "1" (tmp));
 233        }
 234}
 235
 236static inline void raw_outsl(volatile u32 __iomem *port, const u32 *buf,
 237                             unsigned int nr)
 238{
 239        unsigned int tmp;
 240
 241        if (nr & 15) {
 242                tmp = (nr & 15) - 1;
 243                asm volatile (
 244                        "1: movel %0@+,%2@; dbra %1,1b"
 245                        : "=a" (buf), "=d" (tmp)
 246                        : "a" (port), "0" (buf),
 247                          "1" (tmp));
 248        }
 249        if (nr >> 4) {
 250                tmp = (nr >> 4) - 1;
 251                asm volatile (
 252                        "1: "
 253                        "movel %0@+,%2@; "
 254                        "movel %0@+,%2@; "
 255                        "movel %0@+,%2@; "
 256                        "movel %0@+,%2@; "
 257                        "movel %0@+,%2@; "
 258                        "movel %0@+,%2@; "
 259                        "movel %0@+,%2@; "
 260                        "movel %0@+,%2@; "
 261                        "movel %0@+,%2@; "
 262                        "movel %0@+,%2@; "
 263                        "movel %0@+,%2@; "
 264                        "movel %0@+,%2@; "
 265                        "movel %0@+,%2@; "
 266                        "movel %0@+,%2@; "
 267                        "movel %0@+,%2@; "
 268                        "movel %0@+,%2@; "
 269                        "dbra %1,1b"
 270                        : "=a" (buf), "=d" (tmp)
 271                        : "a" (port), "0" (buf),
 272                          "1" (tmp));
 273        }
 274}
 275
 276
 277static inline void raw_insw_swapw(volatile u16 __iomem *port, u16 *buf,
 278                                  unsigned int nr)
 279{
 280    if ((nr) % 8)
 281        __asm__ __volatile__
 282               ("\tmovel %0,%/a0\n\t"
 283                "movel %1,%/a1\n\t"
 284                "movel %2,%/d6\n\t"
 285                "subql #1,%/d6\n"
 286                "1:\tmovew %/a0@,%/d0\n\t"
 287                "rolw  #8,%/d0\n\t"
 288                "movew %/d0,%/a1@+\n\t"
 289                "dbra %/d6,1b"
 290                :
 291                : "g" (port), "g" (buf), "g" (nr)
 292                : "d0", "a0", "a1", "d6");
 293    else
 294        __asm__ __volatile__
 295               ("movel %0,%/a0\n\t"
 296                "movel %1,%/a1\n\t"
 297                "movel %2,%/d6\n\t"
 298                "lsrl  #3,%/d6\n\t"
 299                "subql #1,%/d6\n"
 300                "1:\tmovew %/a0@,%/d0\n\t"
 301                "rolw  #8,%/d0\n\t"
 302                "movew %/d0,%/a1@+\n\t"
 303                "movew %/a0@,%/d0\n\t"
 304                "rolw  #8,%/d0\n\t"
 305                "movew %/d0,%/a1@+\n\t"
 306                "movew %/a0@,%/d0\n\t"
 307                "rolw  #8,%/d0\n\t"
 308                "movew %/d0,%/a1@+\n\t"
 309                "movew %/a0@,%/d0\n\t"
 310                "rolw  #8,%/d0\n\t"
 311                "movew %/d0,%/a1@+\n\t"
 312                "movew %/a0@,%/d0\n\t"
 313                "rolw  #8,%/d0\n\t"
 314                "movew %/d0,%/a1@+\n\t"
 315                "movew %/a0@,%/d0\n\t"
 316                "rolw  #8,%/d0\n\t"
 317                "movew %/d0,%/a1@+\n\t"
 318                "movew %/a0@,%/d0\n\t"
 319                "rolw  #8,%/d0\n\t"
 320                "movew %/d0,%/a1@+\n\t"
 321                "movew %/a0@,%/d0\n\t"
 322                "rolw  #8,%/d0\n\t"
 323                "movew %/d0,%/a1@+\n\t"
 324                "dbra %/d6,1b"
 325                :
 326                : "g" (port), "g" (buf), "g" (nr)
 327                : "d0", "a0", "a1", "d6");
 328}
 329
 330static inline void raw_outsw_swapw(volatile u16 __iomem *port, const u16 *buf,
 331                                   unsigned int nr)
 332{
 333    if ((nr) % 8)
 334        __asm__ __volatile__
 335               ("movel %0,%/a0\n\t"
 336                "movel %1,%/a1\n\t"
 337                "movel %2,%/d6\n\t"
 338                "subql #1,%/d6\n"
 339                "1:\tmovew %/a1@+,%/d0\n\t"
 340                "rolw  #8,%/d0\n\t"
 341                "movew %/d0,%/a0@\n\t"
 342                "dbra %/d6,1b"
 343                :
 344                : "g" (port), "g" (buf), "g" (nr)
 345                : "d0", "a0", "a1", "d6");
 346    else
 347        __asm__ __volatile__
 348               ("movel %0,%/a0\n\t"
 349                "movel %1,%/a1\n\t"
 350                "movel %2,%/d6\n\t"
 351                "lsrl  #3,%/d6\n\t"
 352                "subql #1,%/d6\n"
 353                "1:\tmovew %/a1@+,%/d0\n\t"
 354                "rolw  #8,%/d0\n\t"
 355                "movew %/d0,%/a0@\n\t"
 356                "movew %/a1@+,%/d0\n\t"
 357                "rolw  #8,%/d0\n\t"
 358                "movew %/d0,%/a0@\n\t"
 359                "movew %/a1@+,%/d0\n\t"
 360                "rolw  #8,%/d0\n\t"
 361                "movew %/d0,%/a0@\n\t"
 362                "movew %/a1@+,%/d0\n\t"
 363                "rolw  #8,%/d0\n\t"
 364                "movew %/d0,%/a0@\n\t"
 365                "movew %/a1@+,%/d0\n\t"
 366                "rolw  #8,%/d0\n\t"
 367                "movew %/d0,%/a0@\n\t"
 368                "movew %/a1@+,%/d0\n\t"
 369                "rolw  #8,%/d0\n\t"
 370                "movew %/d0,%/a0@\n\t"
 371                "movew %/a1@+,%/d0\n\t"
 372                "rolw  #8,%/d0\n\t"
 373                "movew %/d0,%/a0@\n\t"
 374                "movew %/a1@+,%/d0\n\t"
 375                "rolw  #8,%/d0\n\t"
 376                "movew %/d0,%/a0@\n\t"
 377                "dbra %/d6,1b"
 378                :
 379                : "g" (port), "g" (buf), "g" (nr)
 380                : "d0", "a0", "a1", "d6");
 381}
 382
 383
 384#if defined(CONFIG_ATARI_ROM_ISA)
 385static inline void raw_rom_insb(volatile u8 __iomem *port, u8 *buf, unsigned int len)
 386{
 387        unsigned int i;
 388
 389        for (i = 0; i < len; i++)
 390                *buf++ = rom_in_8(port);
 391}
 392
 393static inline void raw_rom_outsb(volatile u8 __iomem *port, const u8 *buf,
 394                             unsigned int len)
 395{
 396        unsigned int i;
 397
 398        for (i = 0; i < len; i++)
 399                rom_out_8(port, *buf++);
 400}
 401
 402static inline void raw_rom_insw(volatile u16 __iomem *port, u16 *buf,
 403                                   unsigned int nr)
 404{
 405        unsigned int i;
 406
 407        for (i = 0; i < nr; i++)
 408                *buf++ = rom_in_be16(port);
 409}
 410
 411static inline void raw_rom_outsw(volatile u16 __iomem *port, const u16 *buf,
 412                                   unsigned int nr)
 413{
 414        unsigned int i;
 415
 416        for (i = 0; i < nr; i++)
 417                rom_out_be16(port, *buf++);
 418}
 419
 420static inline void raw_rom_insw_swapw(volatile u16 __iomem *port, u16 *buf,
 421                                   unsigned int nr)
 422{
 423        unsigned int i;
 424
 425        for (i = 0; i < nr; i++)
 426                *buf++ = rom_in_le16(port);
 427}
 428
 429static inline void raw_rom_outsw_swapw(volatile u16 __iomem *port, const u16 *buf,
 430                                   unsigned int nr)
 431{
 432        unsigned int i;
 433
 434        for (i = 0; i < nr; i++)
 435                rom_out_le16(port, *buf++);
 436}
 437#endif /* CONFIG_ATARI_ROM_ISA */
 438
 439#endif /* __KERNEL__ */
 440
 441#endif /* _RAW_IO_H */
 442