/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * 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 <keil@isdn4linux.de>
 *
 * Copyright 2009  by Karsten Keil <keil@isdn4linux.de>
 */

#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