2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2006 M. Warner Losh.
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #ifndef _ARM_AT91_AT91_TWIIO_H
31 #define _ARM_AT91_AT91_TWIIO_H
33 #include <sys/ioccom.h>
37 int dadr; /* Device address */
38 int type; /* read/write */
39 #define TWI_IO_READ_MASTER 1
40 #define TWI_IO_WRITE_MASTER 2
41 int iadrsz; /* Internal addr size */
42 uint32_t iadr; /* Interbak addr */
43 size_t xfer_len; /* Size to transfer */
44 caddr_t xfer_buf; /* buffer for xfer */
49 int ckdiv; /* Clock divider */
50 int high_rate; /* rate of clock high period */
51 int low_rate; /* rate of clock low period */
54 /** TWIIOCXFER: Do a two-wire transfer
56 #define TWIIOCXFER _IOW('x', 1, struct at91_twi_io)
58 /** TWIIOCSETCLOCK: Sets the clocking parameters for this operation.
60 #define TWIIOCSETCLOCK _IOW('x', 2, struct at91_twi_clock)
62 #endif /* !_ARM_AT91_AT91_TWIIO_H */