d7fac9732b
forcing all transfers to do the start read/write stop by hand. Some smart bridges prefer this sort of operation, and this allows us to support their features more easily. When bridges don't support it, we fall back to using the old-style opertaions. Expand the ioctl interface to expose this function. Unlike the old-style interface, this interface is thread safe, even on old bridges.
118 lines
2.3 KiB
Objective-C
118 lines
2.3 KiB
Objective-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.
|
|
#
|
|
# $FreeBSD$
|
|
#
|
|
|
|
#include <sys/bus.h>
|
|
#include <dev/iicbus/iic.h>
|
|
|
|
INTERFACE iicbus;
|
|
|
|
#
|
|
# Interpret interrupt
|
|
#
|
|
METHOD int intr {
|
|
device_t dev;
|
|
int event;
|
|
char *buf;
|
|
};
|
|
|
|
#
|
|
# iicbus callback
|
|
#
|
|
METHOD int callback {
|
|
device_t dev;
|
|
int index;
|
|
caddr_t data;
|
|
};
|
|
|
|
#
|
|
# Send REPEATED_START condition
|
|
#
|
|
METHOD int repeated_start {
|
|
device_t dev;
|
|
u_char slave;
|
|
int timeout;
|
|
};
|
|
|
|
#
|
|
# Send START condition
|
|
#
|
|
METHOD int start {
|
|
device_t dev;
|
|
u_char slave;
|
|
int timeout;
|
|
};
|
|
|
|
#
|
|
# Send STOP condition
|
|
#
|
|
METHOD int stop {
|
|
device_t dev;
|
|
};
|
|
|
|
#
|
|
# Read from I2C bus
|
|
#
|
|
METHOD int read {
|
|
device_t dev;
|
|
char *buf;
|
|
int len;
|
|
int *bytes;
|
|
int last;
|
|
int delay;
|
|
};
|
|
|
|
#
|
|
# Write to the I2C bus
|
|
#
|
|
METHOD int write {
|
|
device_t dev;
|
|
char *buf;
|
|
int len;
|
|
int *bytes;
|
|
int timeout;
|
|
};
|
|
|
|
#
|
|
# Reset I2C bus
|
|
#
|
|
METHOD int reset {
|
|
device_t dev;
|
|
u_char speed;
|
|
u_char addr;
|
|
u_char *oldaddr;
|
|
};
|
|
|
|
#
|
|
# Generalized Read/Write interface
|
|
#
|
|
METHOD int transfer {
|
|
device_t dev;
|
|
struct iic_msg *msgs;
|
|
uint32_t nmsgs;
|
|
};
|