1 /*-
2 * Copyright (c) 2006 M. Warner Losh. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
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.
12 *
13 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23 * SUCH DAMAGE.
24 *
25 * $FreeBSD: src/sys/arm/at91/at91_twiio.h,v 1.2 2008/11/25 00:13:26 imp Exp $
26 */
27
28 #ifndef _ARM_AT91_AT91_TWIIO_H
29 #define _ARM_AT91_AT91_TWIIO_H
30
31 #include <sys/ioccom.h>
32
33 struct at91_twi_io
34 {
35 int dadr; /* Device address */
36 int type; /* read/write */
37 #define TWI_IO_READ_MASTER 1
38 #define TWI_IO_WRITE_MASTER 2
39 int iadrsz; /* Internal addr size */
40 uint32_t iadr; /* Interbak addr */
41 size_t xfer_len; /* Size to transfer */
42 caddr_t xfer_buf; /* buffer for xfer */
43 };
44
45 struct at91_twi_clock
46 {
47 int ckdiv; /* Clock divider */
48 int high_rate; /* rate of clock high period */
49 int low_rate; /* rate of clock low period */
50 };
51
52 /** TWIIOCXFER: Do a two-wire transfer
53 */
54 #define TWIIOCXFER _IOW('x', 1, struct at91_twi_io)
55
56 /** TWIIOCSETCLOCK: Sets the clocking parameters for this operation.
57 */
58 #define TWIIOCSETCLOCK _IOW('x', 2, struct at91_twi_clock)
59
60 #endif /* !_ARM_AT91_AT91_TWIIO_H */
61
62
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