at91_twiio.h revision 185265
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: head/sys/arm/at91/at91_twiio.h 185265 2008-11-25 00:13:26Z imp $ 26 */ 27 28#ifndef _ARM_AT91_AT91_TWIIO_H 29#define _ARM_AT91_AT91_TWIIO_H 30 31#include <sys/ioccom.h> 32 33struct 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 45struct 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 63