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freebsd/sys/dev/iicbus/iicbus_if.m
Doug Rabson f7b7769172 * Factor out the object system from new-bus so that it can be used by
non-device code.
* Re-implement the method dispatch to improve efficiency. The new system
  takes about 40ns for a method dispatch on a 300Mhz PII which is only
  10ns slower than a direct function call on the same hardware.

This changes the new-bus ABI slightly so make sure you re-compile any
driver modules which you use.
2000-04-08 14:17:18 +00:00

108 lines
2.1 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>
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;
};