at91_twiio.h revision 185265
1155324Simp/*- 2155324Simp * Copyright (c) 2006 M. Warner Losh. All rights reserved. 3155324Simp * 4155324Simp * Redistribution and use in source and binary forms, with or without 5155324Simp * modification, are permitted provided that the following conditions 6155324Simp * are met: 7155324Simp * 1. Redistributions of source code must retain the above copyright 8155324Simp * notice, this list of conditions and the following disclaimer. 9155324Simp * 2. Redistributions in binary form must reproduce the above copyright 10155324Simp * notice, this list of conditions and the following disclaimer in the 11155324Simp * documentation and/or other materials provided with the distribution. 12155324Simp * 13185265Simp * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14185265Simp * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15185265Simp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16185265Simp * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 17185265Simp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18185265Simp * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19185265Simp * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20185265Simp * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21185265Simp * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22185265Simp * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23185265Simp * SUCH DAMAGE. 24155324Simp * 25155324Simp * $FreeBSD: head/sys/arm/at91/at91_twiio.h 185265 2008-11-25 00:13:26Z imp $ 26155324Simp */ 27155324Simp 28155324Simp#ifndef _ARM_AT91_AT91_TWIIO_H 29155324Simp#define _ARM_AT91_AT91_TWIIO_H 30155324Simp 31155324Simp#include <sys/ioccom.h> 32155324Simp 33155324Simpstruct at91_twi_io 34155324Simp{ 35155324Simp int dadr; /* Device address */ 36155324Simp int type; /* read/write */ 37155324Simp#define TWI_IO_READ_MASTER 1 38155324Simp#define TWI_IO_WRITE_MASTER 2 39155324Simp int iadrsz; /* Internal addr size */ 40155324Simp uint32_t iadr; /* Interbak addr */ 41155324Simp size_t xfer_len; /* Size to transfer */ 42155324Simp caddr_t xfer_buf; /* buffer for xfer */ 43155324Simp}; 44155324Simp 45155324Simpstruct at91_twi_clock 46155324Simp{ 47155324Simp int ckdiv; /* Clock divider */ 48155324Simp int high_rate; /* rate of clock high period */ 49155324Simp int low_rate; /* rate of clock low period */ 50155324Simp}; 51155324Simp 52155324Simp/** TWIIOCXFER: Do a two-wire transfer 53155324Simp */ 54155324Simp#define TWIIOCXFER _IOW('x', 1, struct at91_twi_io) 55155324Simp 56155324Simp/** TWIIOCSETCLOCK: Sets the clocking parameters for this operation. 57155324Simp */ 58155324Simp#define TWIIOCSETCLOCK _IOW('x', 2, struct at91_twi_clock) 59155324Simp 60155324Simp#endif /* !_ARM_AT91_AT91_TWIIO_H */ 61155324Simp 62155324Simp 63