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#
# Copyright (c) 1998 Doug Rabson
# 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.
#
# $Id: device_if.m,v 1.2 1998/11/08 18:35:53 nsouch Exp $
#
INTERFACE device;
#
# Probe to see if the device is present. Return 0 if the device exists,
# ENXIO if it cannot be found.
#
# Devices which implement busses should use this method to probe for
# the existence of devices attached to the bus and add them as
# children. If this is combined with the use of bus_generic_attach,
# the child devices will be automatically probed and attached.
#
METHOD int probe {
device_t dev;
};
#
# Attach a device to the system. The probe method will have been
# called and will have indicated that the device exists. This routine
# should initialise the hardware and allocate other system resources
# (such as devfs entries). Returns 0 on success.
#
METHOD int attach {
device_t dev;
};
#
# Detach a device. This can be called if the user is replacing the
# driver software or if a device is about to be physically removed
# from the system (e.g. for pccard devices). Returns 0 on success.
#
METHOD int detach {
device_t dev;
};
#
# This is called during system shutdown to allow the driver to put the
# hardware into a consistent state for rebooting the computer.
#
METHOD int shutdown {
device_t dev;
};
#
# This is called by the power-management subsystem when a suspend has been
# requested by the user or by some automatic mechanism. This gives
# drivers a chance to veto the suspend or save their configuration before
# power is removed.
#
METHOD int suspend {
device_t dev;
};
METHOD int resume {
device_t dev;
};
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