1 /* $OpenBSD: onewirevar.h,v 1.7 2010/07/19 23:44:09 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Alexander Yurchenko <grange@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #ifndef _DEV_ONEWIRE_ONEWIREVAR_H_ 20 #define _DEV_ONEWIRE_ONEWIREVAR_H_ 21 22 /* 23 * 1-Wire bus interface. 24 */ 25 26 /* Bus master interface */ 27 struct onewire_bus { 28 void * bus_cookie; 29 30 int (*bus_reset)(void *); 31 int (*bus_bit)(void *, int); 32 int (*bus_read_byte)(void *); 33 void (*bus_write_byte)(void *, int); 34 void (*bus_read_block)(void *, void *, int); 35 void (*bus_write_block)(void *, const void *, int); 36 int (*bus_triplet)(void *, int); 37 void (*bus_matchrom)(void *, u_int64_t); 38 int (*bus_search)(void *, u_int64_t *, int, u_int64_t); 39 }; 40 41 /* Bus methods */ 42 int onewire_lock(void *, int); 43 void onewire_unlock(void *); 44 45 int onewire_reset(void *); 46 int onewire_bit(void *, int); 47 int onewire_read_byte(void *); 48 void onewire_write_byte(void *, int); 49 void onewire_read_block(void *, void *, int); 50 void onewire_write_block(void *, const void *, int); 51 int onewire_triplet(void *, int); 52 void onewire_matchrom(void *, u_int64_t); 53 int onewire_search(void *, u_int64_t *, int, u_int64_t); 54 55 #define ONEWIRE_NOWAIT 0x0001 56 57 /* Bus attachment */ 58 struct onewirebus_attach_args { 59 struct onewire_bus * oba_bus; 60 int oba_flags; 61 #define ONEWIRE_SCAN_NOW 0x0001 62 #define ONEWIRE_NO_PERIODIC_SCAN 0x0002 63 }; 64 65 int onewirebus_print(void *, const char *); 66 67 /* Device attachment */ 68 struct onewire_attach_args { 69 void * oa_onewire; 70 u_int64_t oa_rom; 71 }; 72 73 /* Family matching */ 74 struct onewire_matchfam { 75 int om_type; 76 }; 77 78 /* Miscellaneous routines */ 79 int onewire_crc(const void *, int); 80 u_int16_t onewire_crc16(const void *, int); 81 const char * onewire_famname(int); 82 int onewire_matchbyfam(struct onewire_attach_args *, 83 const struct onewire_matchfam *, int); 84 85 /* Bus bit-banging */ 86 struct onewire_bbops { 87 void (*bb_rx)(void *); 88 void (*bb_tx)(void *); 89 int (*bb_get)(void *); 90 void (*bb_set)(void *, int); 91 }; 92 93 int onewire_bb_reset(const struct onewire_bbops *, void *); 94 int onewire_bb_bit(const struct onewire_bbops *, void *, int); 95 96 #endif /* !_DEV_ONEWIRE_ONEWIREVAR_H_ */ 97