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freebsd/sys/dev/gpio/gpiobus_if.m
Oleksandr Tymoshenko 6b34b16ea5 Initial GPIO bus support. Includes:
- GPIO bus controller interface
  - GPIO bus interface
  - Implementation of GPIO led(4) compatible device
  - Implementation of iic(4) bus over GPIO (author: Luiz Otavio O Souza)

Tested by: Luiz Otavio O Souza, Alexandr Rybalko
2010-09-28 03:24:53 +00:00

122 lines
2.5 KiB
Objective-C

#-
# Copyright (c) 2009 Oleksandr Tymoshenko <gonzo@freebsd.org>
# 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 <sys/gpio.h>
INTERFACE gpiobus;
#
# Lock the gpio bus
#
METHOD void lock_bus {
device_t busdev;
};
#
# Unlock the gpio bus
#
METHOD void unlock_bus {
device_t busdev;
};
#
# Dedicate the gpio bus control for a child
#
METHOD void acquire_bus {
device_t busdev;
device_t dev;
};
#
# Release the bus
#
METHOD void release_bus {
device_t busdev;
device_t dev;
};
#
# Set value of pin specifed by pin_num
#
METHOD int pin_set {
device_t dev;
device_t child;
uint32_t pin_num;
uint32_t pin_value;
};
#
# Get value of pin specifed by pin_num
#
METHOD int pin_get {
device_t dev;
device_t child;
uint32_t pin_num;
uint32_t *pin_value;
};
#
# Toggle value of pin specifed by pin_num
#
METHOD int pin_toggle {
device_t dev;
device_t child;
uint32_t pin_num;
};
#
# Get pin capabilities
#
METHOD int pin_getcaps {
device_t dev;
device_t child;
uint32_t pin_num;
uint32_t *caps;
};
#
# Get pin flags
#
METHOD int pin_getflags {
device_t dev;
device_t child;
uint32_t pin_num;
uint32_t *flags;
};
#
# Set current configuration and capabilities
#
METHOD int pin_setflags {
device_t dev;
device_t child;
uint32_t pin_num;
uint32_t flags;
};