spibusvar.h revision 300710 
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 300710 2016-05-26 06:35:11Z adrian $
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
37#define	SPIBUS_MODE_NONE	0
38#define	SPIBUS_MODE_CPHA	1
39#define	SPIBUS_MODE_CPOL	2
40#define	SPIBUS_MODE_CPOL_CPHA	3
41
42struct spibus_ivar
43{
44	uint32_t	cs;
45	uint32_t	mode;
46	uint32_t	clock;
47};
48
49enum {
50	SPIBUS_IVAR_CS,		/* chip select that we're on */
51	SPIBUS_IVAR_MODE,	/* SPI mode (0-3) */
52	SPIBUS_IVAR_CLOCK,	/* maximum clock freq for device */
53};
54
55#define SPIBUS_ACCESSOR(A, B, T)					\
56static inline int							\
57spibus_get_ ## A(device_t dev, T *t)					\
58{									\
59	return BUS_READ_IVAR(device_get_parent(dev), dev,		\
60	    SPIBUS_IVAR_ ## B, (uintptr_t *) t);			\
61}
62
63SPIBUS_ACCESSOR(cs,		CS,		uint32_t)
64SPIBUS_ACCESSOR(mode,		MODE,		uint32_t)
65SPIBUS_ACCESSOR(clock,		CLOCK,		uint32_t)
66
67extern driver_t spibus_driver;
68extern devclass_t spibus_devclass;
69