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/*-
* Copyright (c) 2015 M. Warner Losh <imp@freebsd.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice unmodified, this list of conditions, and the following
* disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef DEV_OW_OW_H
#define DEV_OW_OW_H 1
enum ow_device_ivars {
OW_IVAR_FAMILY,
OW_IVAR_ROMID
};
#define OW_ACCESSOR(var, ivar, type) \
__BUS_ACCESSOR(ow, var, OW, ivar, type);
OW_ACCESSOR(family, FAMILY, uint8_t)
OW_ACCESSOR(romid, ROMID, uint8_t *)
#undef OW_ACCSSOR
/*
* The following likely should be in the own.h file, but needs to be here to
* avoid recursive issues when defining the own_if.m interface.
*/
/*
* Generalized command structure for a 1wire bus transaction. Not all possible
* transactions on the 1wire bus can be represented here (a notable exception
* being both the search ROM commands), but most of them can be, allowing for
* general transactions from userland. A lower-level interface to the link
* layer is also provided.
*/
#define MAX_ROM 10
#define MAX_XPT 32
#define MAX_READ 32
struct ow_cmd
{
uint32_t flags; /* Various flags */
#define OW_FLAG_OVERDRIVE 1 /* Send xpt stuff overdrive speed */
#define OW_FLAG_READ_BIT 2 /* Read a single bit after xpt_cmd */
uint8_t rom_len; /* Number of ROM bytes to send */
uint8_t rom_cmd[MAX_ROM]; /* Rom command to send */
uint8_t rom_read_len; /* Number of bytes to read */
uint8_t rom_read[MAX_ROM]; /* Extra bytes read */
uint8_t xpt_len; /* Total transport bytes to send */
uint8_t xpt_cmd[MAX_XPT]; /* Device specific command to send, if flagged */
uint8_t xpt_read_len; /* Number of bytes to read after */
uint8_t xpt_read[MAX_READ]; /* Buffer for read bytes */
};
typedef uint64_t romid_t;
#endif /* DEV_OW_OW_H */
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