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