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
29typedef	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
110