spibusvar.h revision 278957 
1/*-
2 * Copyright (c) 2006 M. Warner Losh
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 * $FreeBSD: head/sys/dev/spibus/spibusvar.h 278957 2015-02-18 14:33:33Z imp $
27 */
28
29#define SPIBUS_IVAR(d) (struct spibus_ivar *) device_get_ivars(d)
30#define SPIBUS_SOFTC(d) (struct spibus_softc *) device_get_softc(d)
31
32struct spibus_softc
33{
34	device_t	dev;
35};
36
37struct spibus_ivar
38{
39	uint32_t	cs;
40};
41
42enum {
43	SPIBUS_IVAR_CS		/* chip select that we're on */
44};
45
46#define SPIBUS_ACCESSOR(A, B, T)					\
47static inline int							\
48spibus_get_ ## A(device_t dev, T *t)					\
49{									\
50	return BUS_READ_IVAR(device_get_parent(dev), dev,		\
51	    SPIBUS_IVAR_ ## B, (uintptr_t *) t);			\
52}
53
54SPIBUS_ACCESSOR(cs,		CS,		uint32_t)
55
56extern driver_t spibus_driver;
57extern devclass_t spibus_devclass;
58