62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
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/*-
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* Copyright (c) 2006 M. Warner Losh. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _ARM_AT91_AT91_TWIIO_H
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#define _ARM_AT91_AT91_TWIIO_H
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#include <sys/ioccom.h>
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struct at91_twi_io
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{
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int dadr; /* Device address */
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int type; /* read/write */
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#define TWI_IO_READ_MASTER 1
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#define TWI_IO_WRITE_MASTER 2
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int iadrsz; /* Internal addr size */
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uint32_t iadr; /* Interbak addr */
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size_t xfer_len; /* Size to transfer */
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caddr_t xfer_buf; /* buffer for xfer */
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};
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struct at91_twi_clock
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{
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int ckdiv; /* Clock divider */
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int high_rate; /* rate of clock high period */
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int low_rate; /* rate of clock low period */
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};
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/** TWIIOCXFER: Do a two-wire transfer
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*/
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#define TWIIOCXFER _IOW('x', 1, struct at91_twi_io)
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/** TWIIOCSETCLOCK: Sets the clocking parameters for this operation.
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*/
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#define TWIIOCSETCLOCK _IOW('x', 2, struct at91_twi_clock)
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#endif /* !_ARM_AT91_AT91_TWIIO_H */
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