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