1/*	$NetBSD: bcm2835_mbox.h,v 1.6 2019/12/30 18:43:38 jmcneill 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_NUMCHANNELS 16
38#define	BCM2835_MBOX_CHANMASK    0xf
39
40#define	BCM2835_MBOX_CHAN(chan) ((chan) & BCM2835_MBOX_CHANMASK)
41#define	BCM2835_MBOX_DATA(data) ((data) & ~BCM2835_MBOX_CHANMASK)
42
43#define	BCM2835_MBOX_MSG(chan, data) \
44    (BCM2835_MBOX_CHAN(chan) | BCM2835_MBOX_DATA(data))
45
46struct bcm2835mbox_softc {
47	device_t sc_dev;
48	device_t sc_platdev;
49
50	bus_space_tag_t sc_iot;
51	bus_space_handle_t sc_ioh;
52	bus_dma_tag_t sc_dmat;
53	void *sc_intrh;
54
55	kmutex_t sc_lock;
56	kmutex_t sc_intr_lock;
57	kcondvar_t sc_chan[BCM2835_MBOX_NUMCHANNELS];
58	uint32_t sc_mbox[BCM2835_MBOX_NUMCHANNELS];
59};
60
61void bcm2835_mbox_read(bus_space_tag_t, bus_space_handle_t, uint8_t,
62    uint32_t *);
63void bcm2835_mbox_write(bus_space_tag_t, bus_space_handle_t, uint8_t,
64    uint32_t);
65
66void bcmmbox_attach(struct bcm2835mbox_softc *);
67int bcmmbox_intr(void *);
68void bcmmbox_read(uint8_t, uint32_t *);
69void bcmmbox_write(uint8_t, uint32_t);
70
71int bcmmbox_request(uint8_t, void *, size_t, uint32_t *);
72
73struct bcmmbox_attach_args {
74	bus_dma_tag_t	baa_dmat;
75};
76
77#endif /* _BCM2835_MBOX_H_ */
78