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freebsd/sys/arm/at91/at91_twiio.h
Warner Losh 82645a84eb Tweak the disclaimer section of the license to match COPYRIGHT, for
better or worse.  Ok'd by folks that have additional copyrights to the
files in cases where there's joint authorship.
2008-11-25 00:13:26 +00:00

63 lines
2.1 KiB
C

/*-
* Copyright (c) 2006 M. Warner Losh. 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, 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 AUTHOR AND CONTRIBUTORS ``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 AUTHOR OR CONTRIBUTORS 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 _ARM_AT91_AT91_TWIIO_H
#define _ARM_AT91_AT91_TWIIO_H
#include <sys/ioccom.h>
struct at91_twi_io
{
int dadr; /* Device address */
int type; /* read/write */
#define TWI_IO_READ_MASTER 1
#define TWI_IO_WRITE_MASTER 2
int iadrsz; /* Internal addr size */
uint32_t iadr; /* Interbak addr */
size_t xfer_len; /* Size to transfer */
caddr_t xfer_buf; /* buffer for xfer */
};
struct at91_twi_clock
{
int ckdiv; /* Clock divider */
int high_rate; /* rate of clock high period */
int low_rate; /* rate of clock low period */
};
/** TWIIOCXFER: Do a two-wire transfer
*/
#define TWIIOCXFER _IOW('x', 1, struct at91_twi_io)
/** TWIIOCSETCLOCK: Sets the clocking parameters for this operation.
*/
#define TWIIOCSETCLOCK _IOW('x', 2, struct at91_twi_clock)
#endif /* !_ARM_AT91_AT91_TWIIO_H */