mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-15 10:17:20 +00:00
79 lines
2.6 KiB
C
79 lines
2.6 KiB
C
/*-
|
|
* Copyright (c) 1998 Nicolas Souchu
|
|
* 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.
|
|
*
|
|
* $FreeBSD$
|
|
*
|
|
*/
|
|
#ifndef __IICBUS_H
|
|
#define __IICBUS_H
|
|
|
|
#include <sys/_lock.h>
|
|
#include <sys/_mutex.h>
|
|
|
|
#define IICBUS_IVAR(d) (struct iicbus_ivar *) device_get_ivars(d)
|
|
#define IICBUS_SOFTC(d) (struct iicbus_softc *) device_get_softc(d)
|
|
|
|
struct iicbus_softc
|
|
{
|
|
device_t dev; /* Myself */
|
|
device_t owner; /* iicbus owner device structure */
|
|
u_char started; /* address of the 'started' slave
|
|
* 0 if no start condition succeeded */
|
|
u_char strict; /* deny operations that violate the
|
|
* I2C protocol */
|
|
struct mtx lock;
|
|
u_int bus_freq; /* Configured bus Hz. */
|
|
};
|
|
|
|
struct iicbus_ivar
|
|
{
|
|
uint32_t addr;
|
|
struct resource_list rl;
|
|
bool nostop;
|
|
};
|
|
|
|
enum {
|
|
IICBUS_IVAR_ADDR, /* Address or base address */
|
|
IICBUS_IVAR_NOSTOP, /* nostop defaults */
|
|
};
|
|
|
|
#define IICBUS_ACCESSOR(A, B, T) \
|
|
__BUS_ACCESSOR(iicbus, A, IICBUS, B, T)
|
|
|
|
IICBUS_ACCESSOR(addr, ADDR, uint32_t)
|
|
IICBUS_ACCESSOR(nostop, NOSTOP, bool)
|
|
|
|
#define IICBUS_LOCK(sc) mtx_lock(&(sc)->lock)
|
|
#define IICBUS_UNLOCK(sc) mtx_unlock(&(sc)->lock)
|
|
#define IICBUS_ASSERT_LOCKED(sc) mtx_assert(&(sc)->lock, MA_OWNED)
|
|
|
|
int iicbus_generic_intr(device_t dev, int event, char *buf);
|
|
void iicbus_init_frequency(device_t dev, u_int bus_freq);
|
|
|
|
extern driver_t iicbus_driver;
|
|
extern devclass_t iicbus_devclass;
|
|
|
|
#endif
|