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