1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * iohelper.h
4 *		helper for define functions to access ISDN hardware
5 *              supported are memory mapped IO
6 *		indirect port IO (one port for address, one for data)
7 *
8 * Author       Karsten Keil <keil@isdn4linux.de>
9 *
10 * Copyright 2009  by Karsten Keil <keil@isdn4linux.de>
11 */
12
13#ifndef _IOHELPER_H
14#define _IOHELPER_H
15
16typedef	u8	(read_reg_func)(void *hwp, u8 offset);
17			       typedef	void	(write_reg_func)(void *hwp, u8 offset, u8 value);
18			       typedef	void	(fifo_func)(void *hwp, u8 offset, u8 *datap, int size);
19
20			       struct _ioport {
21				       u32	port;
22				       u32	ale;
23			       };
24
25#define IOFUNC_IO(name, hws, ap)					\
26	static u8 Read##name##_IO(void *p, u8 off) {			\
27		struct hws *hw = p;					\
28		return inb(hw->ap.port + off);				\
29	}								\
30	static void Write##name##_IO(void *p, u8 off, u8 val) {		\
31		struct hws *hw = p;					\
32		outb(val, hw->ap.port + off);				\
33	}								\
34	static void ReadFiFo##name##_IO(void *p, u8 off, u8 *dp, int size) { \
35		struct hws *hw = p;					\
36		insb(hw->ap.port + off, dp, size);			\
37	}								\
38	static void WriteFiFo##name##_IO(void *p, u8 off, u8 *dp, int size) { \
39		struct hws *hw = p;					\
40		outsb(hw->ap.port + off, dp, size);			\
41	}
42
43#define IOFUNC_IND(name, hws, ap)					\
44	static u8 Read##name##_IND(void *p, u8 off) {			\
45		struct hws *hw = p;					\
46		outb(off, hw->ap.ale);					\
47		return inb(hw->ap.port);				\
48	}								\
49	static void Write##name##_IND(void *p, u8 off, u8 val) {	\
50		struct hws *hw = p;					\
51		outb(off, hw->ap.ale);					\
52		outb(val, hw->ap.port);					\
53	}								\
54	static void ReadFiFo##name##_IND(void *p, u8 off, u8 *dp, int size) { \
55		struct hws *hw = p;					\
56		outb(off, hw->ap.ale);					\
57		insb(hw->ap.port, dp, size);				\
58	}								\
59	static void WriteFiFo##name##_IND(void *p, u8 off, u8 *dp, int size) { \
60		struct hws *hw = p;					\
61		outb(off, hw->ap.ale);					\
62		outsb(hw->ap.port, dp, size);				\
63	}
64
65#define IOFUNC_MEMIO(name, hws, typ, adr)				\
66	static u8 Read##name##_MIO(void *p, u8 off) {			\
67		struct hws *hw = p;					\
68		return readb(((typ *)hw->adr) + off);			\
69	}								\
70	static void Write##name##_MIO(void *p, u8 off, u8 val) {	\
71		struct hws *hw = p;					\
72		writeb(val, ((typ *)hw->adr) + off);			\
73	}								\
74	static void ReadFiFo##name##_MIO(void *p, u8 off, u8 *dp, int size) { \
75		struct hws *hw = p;					\
76		while (size--)						\
77			*dp++ = readb(((typ *)hw->adr) + off);		\
78	}								\
79	static void WriteFiFo##name##_MIO(void *p, u8 off, u8 *dp, int size) { \
80		struct hws *hw = p;					\
81		while (size--)						\
82			writeb(*dp++, ((typ *)hw->adr) + off);		\
83	}
84
85#define ASSIGN_FUNC(typ, name, dest)	do {			\
86		dest.read_reg = &Read##name##_##typ;		\
87		dest.write_reg = &Write##name##_##typ;		\
88		dest.read_fifo = &ReadFiFo##name##_##typ;	\
89		dest.write_fifo = &WriteFiFo##name##_##typ;	\
90	} while (0)
91#define ASSIGN_FUNC_IPAC(typ, target)	do {		\
92		ASSIGN_FUNC(typ, ISAC, target.isac);	\
93		ASSIGN_FUNC(typ, IPAC, target);		\
94	} while (0)
95
96#endif
97