The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/spibus/spibusvar.h

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    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/11.2/sys/dev/spibus/spibusvar.h 332942 2018-04-24 17:00:08Z ian $
   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 #define SPIBUS_CS_HIGH  (1U << 31)
   50 
   51 enum {
   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)                                        \
   58 static inline int                                                       \
   59 spibus_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 }                                                                       \
   64 static inline int                                                       \
   65 spibus_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 
   71 SPIBUS_ACCESSOR(cs,             CS,             uint32_t)
   72 SPIBUS_ACCESSOR(mode,           MODE,           uint32_t)
   73 SPIBUS_ACCESSOR(clock,          CLOCK,          uint32_t)
   74 
   75 extern driver_t spibus_driver;
   76 extern devclass_t spibus_devclass;
   77 extern driver_t ofw_spibus_driver;
   78 extern devclass_t ofw_spibus_devclass;

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