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 29 typedef 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