iohelper.h

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/*
 * iohelper.h
 *      helper for define functions to access ISDN hardware
 *              supported are memory mapped IO
 *      indirect port IO (one port for address, one for data)
 *
 * Author       Karsten Keil <[email protected]>
 *
 * Copyright 2009  by Karsten Keil <[email protected]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */

#ifndef _IOHELPER_H
#define _IOHELPER_H

typedef u8  (read_reg_func)(void *hwp, u8 offset);
                   typedef  void    (write_reg_func)(void *hwp, u8 offset, u8 value);
                   typedef  void    (fifo_func)(void *hwp, u8 offset, u8 *datap, int size);

                   struct _ioport {
                       u32  port;
                       u32  ale;
                   };

#define IOFUNC_IO(name, hws, ap)                    \
    static u8 Read##name##_IO(void *p, u8 off) {            \
        struct hws *hw = p;                 \
        return inb(hw->ap.port + off);              \
    }                               \
    static void Write##name##_IO(void *p, u8 off, u8 val) {     \
        struct hws *hw = p;                 \
        outb(val, hw->ap.port + off);               \
    }                               \
    static void ReadFiFo##name##_IO(void *p, u8 off, u8 *dp, int size) { \
        struct hws *hw = p;                 \
        insb(hw->ap.port + off, dp, size);          \
    }                               \
    static void WriteFiFo##name##_IO(void *p, u8 off, u8 *dp, int size) { \
        struct hws *hw = p;                 \
        outsb(hw->ap.port + off, dp, size);         \
    }

#define IOFUNC_IND(name, hws, ap)                   \
    static u8 Read##name##_IND(void *p, u8 off) {           \
        struct hws *hw = p;                 \
        outb(off, hw->ap.ale);                  \
        return inb(hw->ap.port);                \
    }                               \
    static void Write##name##_IND(void *p, u8 off, u8 val) {    \
        struct hws *hw = p;                 \
        outb(off, hw->ap.ale);                  \
        outb(val, hw->ap.port);                 \
    }                               \
    static void ReadFiFo##name##_IND(void *p, u8 off, u8 *dp, int size) { \
        struct hws *hw = p;                 \
        outb(off, hw->ap.ale);                  \
        insb(hw->ap.port, dp, size);                \
    }                               \
    static void WriteFiFo##name##_IND(void *p, u8 off, u8 *dp, int size) { \
        struct hws *hw = p;                 \
        outb(off, hw->ap.ale);                  \
        outsb(hw->ap.port, dp, size);               \
    }

#define IOFUNC_MEMIO(name, hws, typ, adr)               \
    static u8 Read##name##_MIO(void *p, u8 off) {           \
        struct hws *hw = p;                 \
        return readb(((typ *)hw->adr) + off);           \
    }                               \
    static void Write##name##_MIO(void *p, u8 off, u8 val) {    \
        struct hws *hw = p;                 \
        writeb(val, ((typ *)hw->adr) + off);            \
    }                               \
    static void ReadFiFo##name##_MIO(void *p, u8 off, u8 *dp, int size) { \
        struct hws *hw = p;                 \
        while (size--)                      \
            *dp++ = readb(((typ *)hw->adr) + off);      \
    }                               \
    static void WriteFiFo##name##_MIO(void *p, u8 off, u8 *dp, int size) { \
        struct hws *hw = p;                 \
        while (size--)                      \
            writeb(*dp++, ((typ *)hw->adr) + off);      \
    }

#define ASSIGN_FUNC(typ, name, dest)    do {            \
        dest.read_reg = &Read##name##_##typ;        \
        dest.write_reg = &Write##name##_##typ;      \
        dest.read_fifo = &ReadFiFo##name##_##typ;   \
        dest.write_fifo = &WriteFiFo##name##_##typ; \
    } while (0)
#define ASSIGN_FUNC_IPAC(typ, target)   do {        \
        ASSIGN_FUNC(typ, ISAC, target.isac);    \
        ASSIGN_FUNC(typ, IPAC, target);     \
    } while (0)

#endif