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
  29 typedef 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