/*-
* Copyright (c) 2006 M. Warner Losh <imp@FreeBSD.org>
*
* 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;
struct resource_list rl;
};
#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;
