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 | |
16 | typedef 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 | |