at91_twiio.h

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    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: releng/8.1/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 
   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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FreeBSD/Linux Kernel Cross Reference sys/arm/at91/at91_twiio.h

FreeBSD/Linux Kernel Cross Reference
sys/arm/at91/at91_twiio.h