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: releng/11.1/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
32 struct 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
42 struct spibus_ivar
43 {
44 uint32_t cs;
45 uint32_t mode;
46 uint32_t clock;
47 };
48
49 enum {
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) \
56 static inline int \
57 spibus_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
63 SPIBUS_ACCESSOR(cs, CS, uint32_t)
64 SPIBUS_ACCESSOR(mode, MODE, uint32_t)
65 SPIBUS_ACCESSOR(clock, CLOCK, uint32_t)
66
67 extern driver_t spibus_driver;
68 extern devclass_t spibus_devclass;
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