at91_twiio.h revision 155324
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 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. 23 * 24 * $FreeBSD: head/sys/arm/at91/at91_twiio.h 155324 2006-02-04 23:32:13Z imp $ 25 */ 26 27#ifndef _ARM_AT91_AT91_TWIIO_H 28#define _ARM_AT91_AT91_TWIIO_H 29 30#include <sys/ioccom.h> 31 32struct at91_twi_io 33{ 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 */ 42}; 43 44struct at91_twi_clock 45{ 46 int ckdiv; /* Clock divider */ 47 int high_rate; /* rate of clock high period */ 48 int low_rate; /* rate of clock low period */ 49}; 50 51/** TWIIOCXFER: Do a two-wire transfer 52 */ 53#define TWIIOCXFER _IOW('x', 1, struct at91_twi_io) 54 55/** TWIIOCSETCLOCK: Sets the clocking parameters for this operation. 56 */ 57#define TWIIOCSETCLOCK _IOW('x', 2, struct at91_twi_clock) 58 59#endif /* !_ARM_AT91_AT91_TWIIO_H */ 60 61 62