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bcm2835_mbox.h revision 1.2 
      1 /*	$NetBSD: bcm2835_mbox.h,v 1.2 2012/08/22 13:19:47 jakllsch Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Nick Hudson
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _BCM2835_MBOX_H_
     33 #define	_BCM2835_MBOX_H_
     34 
     35 #include <sys/bus.h>
     36 
     37 #define	BCM2835_MBOX_CHAN(mbox) ((mbox) & 0xf)
     38 #define	BCM2835_MBOX_DATA(mbox) (((mbox) & ~0xf) >> 4)
     39 
     40 #define	BCM2835_MBOX_MSG(chan, data) (((chan) & 0xf) | ((data) << 4))
     41 
     42 void bcm2835_mbox_read(bus_space_tag_t, bus_space_handle_t, uint8_t,
     43     uint32_t *);
     44 void bcm2835_mbox_write(bus_space_tag_t, bus_space_handle_t, uint8_t,
     45     uint32_t);
     46 
     47 void bcmmbox_read(uint8_t, uint32_t *);
     48 void bcmmbox_write(uint8_t, uint32_t);
     49 
     50 #endif /* _BCM2835_MBOX_H_ */
     51