79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/*-
|
|
* Copyright (c) 2006 M. Warner Losh
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#define SPIBUS_IVAR(d) (struct spibus_ivar *) device_get_ivars(d)
|
|
#define SPIBUS_SOFTC(d) (struct spibus_softc *) device_get_softc(d)
|
|
|
|
struct spibus_softc
|
|
{
|
|
device_t dev;
|
|
};
|
|
|
|
#define SPIBUS_MODE_NONE 0
|
|
#define SPIBUS_MODE_CPHA 1
|
|
#define SPIBUS_MODE_CPOL 2
|
|
#define SPIBUS_MODE_CPOL_CPHA 3
|
|
|
|
struct spibus_ivar
|
|
{
|
|
uint32_t cs;
|
|
uint32_t mode;
|
|
uint32_t clock;
|
|
};
|
|
|
|
#define SPIBUS_CS_HIGH (1U << 31)
|
|
|
|
enum {
|
|
SPIBUS_IVAR_CS, /* chip select that we're on */
|
|
SPIBUS_IVAR_MODE, /* SPI mode (0-3) */
|
|
SPIBUS_IVAR_CLOCK, /* maximum clock freq for device */
|
|
};
|
|
|
|
#define SPIBUS_ACCESSOR(A, B, T) \
|
|
static inline int \
|
|
spibus_get_ ## A(device_t dev, T *t) \
|
|
{ \
|
|
return BUS_READ_IVAR(device_get_parent(dev), dev, \
|
|
SPIBUS_IVAR_ ## B, (uintptr_t *) t); \
|
|
} \
|
|
static inline int \
|
|
spibus_set_ ## A(device_t dev, T t) \
|
|
{ \
|
|
return BUS_WRITE_IVAR(device_get_parent(dev), dev, \
|
|
SPIBUS_IVAR_ ## B, (uintptr_t) t); \
|
|
}
|
|
|
|
SPIBUS_ACCESSOR(cs, CS, uint32_t)
|
|
SPIBUS_ACCESSOR(mode, MODE, uint32_t)
|
|
SPIBUS_ACCESSOR(clock, CLOCK, uint32_t)
|
|
|
|
extern driver_t spibus_driver;
|
|
extern devclass_t spibus_devclass;
|
|
extern driver_t ofw_spibus_driver;
|
|
extern devclass_t ofw_spibus_devclass;
|