LXR linux/drivers/isdn/hardware/mISDN/iohelper.h

   1/*
   2 * iohelper.h
   3 *              helper for define functions to access ISDN hardware
   4 *              supported are memory mapped IO
   5 *              indirect port IO (one port for address, one for data)
   6 *
   7 * Author       Karsten Keil <keil@isdn4linux.de>
   8 *
   9 * Copyright 2009  by Karsten Keil <keil@isdn4linux.de>
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License version 2 as
  13 * published by the Free Software Foundation.
  14 *
  15 * This program is distributed in the hope that it will be useful,
  16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 * GNU General Public License for more details.
  19 *
  20 * You should have received a copy of the GNU General Public License
  21 * along with this program; if not, write to the Free Software
  22 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 *
  24 */
  25
  26#ifndef _IOHELPER_H
  27#define _IOHELPER_H
  28
  29typedef u8      (read_reg_func)(void *hwp, u8 offset);
  30                               typedef  void    (write_reg_func)(void *hwp, u8 offset, u8 value);
  31                               typedef  void    (fifo_func)(void *hwp, u8 offset, u8 *datap, int size);
  32
  33                               struct _ioport {
  34                                       u32      port;
  35                                       u32      ale;
  36                               };
  37
  38#define IOFUNC_IO(name, hws, ap)                                        \
  39        static u8 Read##name##_IO(void *p, u8 off) {                    \
  40                struct hws *hw = p;                                     \
  41                return inb(hw->ap.port + off);                          \
  42        }                                                               \
  43        static void Write##name##_IO(void *p, u8 off, u8 val) {         \
  44                struct hws *hw = p;                                     \
  45                outb(val, hw->ap.port + off);                           \
  46        }                                                               \
  47        static void ReadFiFo##name##_IO(void *p, u8 off, u8 *dp, int size) { \
  48                struct hws *hw = p;                                     \
  49                insb(hw->ap.port + off, dp, size);                      \
  50        }                                                               \
  51        static void WriteFiFo##name##_IO(void *p, u8 off, u8 *dp, int size) { \
  52                struct hws *hw = p;                                     \
  53                outsb(hw->ap.port + off, dp, size);                     \
  54        }
  55
  56#define IOFUNC_IND(name, hws, ap)                                       \
  57        static u8 Read##name##_IND(void *p, u8 off) {                   \
  58                struct hws *hw = p;                                     \
  59                outb(off, hw->ap.ale);                                  \
  60                return inb(hw->ap.port);                                \
  61        }                                                               \
  62        static void Write##name##_IND(void *p, u8 off, u8 val) {        \
  63                struct hws *hw = p;                                     \
  64                outb(off, hw->ap.ale);                                  \
  65                outb(val, hw->ap.port);                                 \
  66        }                                                               \
  67        static void ReadFiFo##name##_IND(void *p, u8 off, u8 *dp, int size) { \
  68                struct hws *hw = p;                                     \
  69                outb(off, hw->ap.ale);                                  \
  70                insb(hw->ap.port, dp, size);                            \
  71        }                                                               \
  72        static void WriteFiFo##name##_IND(void *p, u8 off, u8 *dp, int size) { \
  73                struct hws *hw = p;                                     \
  74                outb(off, hw->ap.ale);                                  \
  75                outsb(hw->ap.port, dp, size);                           \
  76        }
  77
  78#define IOFUNC_MEMIO(name, hws, typ, adr)                               \
  79        static u8 Read##name##_MIO(void *p, u8 off) {                   \
  80                struct hws *hw = p;                                     \
  81                return readb(((typ *)hw->adr) + off);                   \
  82        }                                                               \
  83        static void Write##name##_MIO(void *p, u8 off, u8 val) {        \
  84                struct hws *hw = p;                                     \
  85                writeb(val, ((typ *)hw->adr) + off);                    \
  86        }                                                               \
  87        static void ReadFiFo##name##_MIO(void *p, u8 off, u8 *dp, int size) { \
  88                struct hws *hw = p;                                     \
  89                while (size--)                                          \
  90                        *dp++ = readb(((typ *)hw->adr) + off);          \
  91        }                                                               \
  92        static void WriteFiFo##name##_MIO(void *p, u8 off, u8 *dp, int size) { \
  93                struct hws *hw = p;                                     \
  94                while (size--)                                          \
  95                        writeb(*dp++, ((typ *)hw->adr) + off);          \
  96        }
  97
  98#define ASSIGN_FUNC(typ, name, dest)    do {                    \
  99                dest.read_reg = &Read##name##_##typ;            \
 100                dest.write_reg = &Write##name##_##typ;          \
 101                dest.read_fifo = &ReadFiFo##name##_##typ;       \
 102                dest.write_fifo = &WriteFiFo##name##_##typ;     \
 103        } while (0)
 104#define ASSIGN_FUNC_IPAC(typ, target)   do {            \
 105                ASSIGN_FUNC(typ, ISAC, target.isac);    \
 106                ASSIGN_FUNC(typ, IPAC, target);         \
 107        } while (0)
 108
 109#endif
 110