drivers/isdn/hardware/mISDN/iohelper.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * iohelper.h
   4  *              helper for define functions to access ISDN hardware
   5  *              supported are memory mapped IO
   6  *              indirect port IO (one port for address, one for data)
   7  *
   8  * Author       Karsten Keil <keil@isdn4linux.de>
   9  *
  10  * Copyright 2009  by Karsten Keil <keil@isdn4linux.de>
  11  */
  12
  13 #ifndef _IOHELPER_H
  14 #define _IOHELPER_H
  15
  16 typedef u8      (read_reg_func)(void *hwp, u8 offset);
  17                                typedef  void    (write_reg_func)(void *hwp, u8 offset, u8 value);
  18                                typedef  void    (fifo_func)(void *hwp, u8 offset, u8 *datap, int size);
  19
  20                                struct _ioport {
  21                                        u32      port;
  22                                        u32      ale;
  23                                };
  24
  25 #define IOFUNC_IO(name, hws, ap)                                        \
  26         static u8 Read##name##_IO(void *p, u8 off) {                    \
  27                 struct hws *hw = p;                                     \
  28                 return inb(hw->ap.port + off);                          \
  29         }                                                               \
  30         static void Write##name##_IO(void *p, u8 off, u8 val) {         \
  31                 struct hws *hw = p;                                     \
  32                 outb(val, hw->ap.port + off);                           \
  33         }                                                               \
  34         static void ReadFiFo##name##_IO(void *p, u8 off, u8 *dp, int size) { \
  35                 struct hws *hw = p;                                     \
  36                 insb(hw->ap.port + off, dp, size);                      \
  37         }                                                               \
  38         static void WriteFiFo##name##_IO(void *p, u8 off, u8 *dp, int size) { \
  39                 struct hws *hw = p;                                     \
  40                 outsb(hw->ap.port + off, dp, size);                     \
  41         }
  42
  43 #define IOFUNC_IND(name, hws, ap)                                       \
  44         static u8 Read##name##_IND(void *p, u8 off) {                   \
  45                 struct hws *hw = p;                                     \
  46                 outb(off, hw->ap.ale);                                  \
  47                 return inb(hw->ap.port);                                \
  48         }                                                               \
  49         static void Write##name##_IND(void *p, u8 off, u8 val) {        \
  50                 struct hws *hw = p;                                     \
  51                 outb(off, hw->ap.ale);                                  \
  52                 outb(val, hw->ap.port);                                 \
  53         }                                                               \
  54         static void ReadFiFo##name##_IND(void *p, u8 off, u8 *dp, int size) { \
  55                 struct hws *hw = p;                                     \
  56                 outb(off, hw->ap.ale);                                  \
  57                 insb(hw->ap.port, dp, size);                            \
  58         }                                                               \
  59         static void WriteFiFo##name##_IND(void *p, u8 off, u8 *dp, int size) { \
  60                 struct hws *hw = p;                                     \
  61                 outb(off, hw->ap.ale);                                  \
  62                 outsb(hw->ap.port, dp, size);                           \
  63         }
  64
  65 #define IOFUNC_MEMIO(name, hws, typ, adr)                               \
  66         static u8 Read##name##_MIO(void *p, u8 off) {                   \
  67                 struct hws *hw = p;                                     \
  68                 return readb(((typ *)hw->adr) + off);                   \
  69         }                                                               \
  70         static void Write##name##_MIO(void *p, u8 off, u8 val) {        \
  71                 struct hws *hw = p;                                     \
  72                 writeb(val, ((typ *)hw->adr) + off);                    \
  73         }                                                               \
  74         static void ReadFiFo##name##_MIO(void *p, u8 off, u8 *dp, int size) { \
  75                 struct hws *hw = p;                                     \
  76                 while (size--)                                          \
  77                         *dp++ = readb(((typ *)hw->adr) + off);          \
  78         }                                                               \
  79         static void WriteFiFo##name##_MIO(void *p, u8 off, u8 *dp, int size) { \
  80                 struct hws *hw = p;                                     \
  81                 while (size--)                                          \
  82                         writeb(*dp++, ((typ *)hw->adr) + off);          \
  83         }
  84
  85 #define ASSIGN_FUNC(typ, name, dest)    do {                    \
  86                 dest.read_reg = &Read##name##_##typ;            \
  87                 dest.write_reg = &Write##name##_##typ;          \
  88                 dest.read_fifo = &ReadFiFo##name##_##typ;       \
  89                 dest.write_fifo = &WriteFiFo##name##_##typ;     \
  90         } while (0)
  91 #define ASSIGN_FUNC_IPAC(typ, target)   do {            \
  92                 ASSIGN_FUNC(typ, ISAC, target.isac);    \
  93                 ASSIGN_FUNC(typ, IPAC, target);         \
  94         } while (0)
  95
  96 #endif