1/*-
2 * Copyright (c) 2006 M. Warner Losh <imp@FreeBSD.org>
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 THE 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 THE 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 * $FreeBSD$
26 */
27
28#define SPIBUS_IVAR(d) (struct spibus_ivar *) device_get_ivars(d)
29#define SPIBUS_SOFTC(d) (struct spibus_softc *) device_get_softc(d)
30
31struct spibus_softc
32{
33	device_t	dev;
34};
35
36#define	SPIBUS_MODE_NONE	0
37#define	SPIBUS_MODE_CPHA	1
38#define	SPIBUS_MODE_CPOL	2
39#define	SPIBUS_MODE_CPOL_CPHA	3
40
41struct spibus_ivar
42{
43	uint32_t	cs;
44	uint32_t	mode;
45	uint32_t	clock;
46	struct resource_list	rl;
47};
48
49#define	SPIBUS_CS_HIGH	(1U << 31)
50
51enum {
52	SPIBUS_IVAR_CS,		/* chip select that we're on */
53	SPIBUS_IVAR_MODE,	/* SPI mode (0-3) */
54	SPIBUS_IVAR_CLOCK,	/* maximum clock freq for device */
55};
56
57#define SPIBUS_ACCESSOR(A, B, T)					\
58static inline int							\
59spibus_get_ ## A(device_t dev, T *t)					\
60{									\
61	return BUS_READ_IVAR(device_get_parent(dev), dev,		\
62	    SPIBUS_IVAR_ ## B, (uintptr_t *) t);			\
63}									\
64static inline int							\
65spibus_set_ ## A(device_t dev, T t)					\
66{									\
67	return BUS_WRITE_IVAR(device_get_parent(dev), dev,		\
68	    SPIBUS_IVAR_ ## B, (uintptr_t) t);			\
69}
70
71SPIBUS_ACCESSOR(cs,		CS,		uint32_t)
72SPIBUS_ACCESSOR(mode,		MODE,		uint32_t)
73SPIBUS_ACCESSOR(clock,		CLOCK,		uint32_t)
74
75extern driver_t spibus_driver;
76extern devclass_t spibus_devclass;
77extern driver_t ofw_spibus_driver;
78extern devclass_t ofw_spibus_devclass;
79