1# 2# Copyright (c) 1998 Doug Rabson 3# All rights reserved. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions 7# are met: 8# 1. Redistributions of source code must retain the above copyright 9# notice, this list of conditions and the following disclaimer. 10# 2. Redistributions in binary form must reproduce the above copyright 11# notice, this list of conditions and the following disclaimer in the 12# documentation and/or other materials provided with the distribution. 13# 14# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24# SUCH DAMAGE. 25# 26# $Id: device_if.m,v 1.2 1998/11/08 18:35:53 nsouch Exp $ 27# 28 29INTERFACE device; 30 31# 32# Probe to see if the device is present. Return 0 if the device exists, 33# ENXIO if it cannot be found. 34# 35# Devices which implement busses should use this method to probe for 36# the existence of devices attached to the bus and add them as 37# children. If this is combined with the use of bus_generic_attach, 38# the child devices will be automatically probed and attached. 39# 40METHOD int probe { 41 device_t dev; 42}; 43 44# 45# Attach a device to the system. The probe method will have been 46# called and will have indicated that the device exists. This routine 47# should initialise the hardware and allocate other system resources 48# (such as devfs entries). Returns 0 on success. 49# 50METHOD int attach { 51 device_t dev; 52}; 53 54# 55# Detach a device. This can be called if the user is replacing the 56# driver software or if a device is about to be physically removed 57# from the system (e.g. for pccard devices). Returns 0 on success. 58# 59METHOD int detach { 60 device_t dev; 61}; 62 63# 64# This is called during system shutdown to allow the driver to put the 65# hardware into a consistent state for rebooting the computer. 66# 67METHOD int shutdown { 68 device_t dev; 69}; 70 71# 72# This is called by the power-management subsystem when a suspend has been 73# requested by the user or by some automatic mechanism. This gives 74# drivers a chance to veto the suspend or save their configuration before 75# power is removed. 76# 77METHOD int suspend { 78 device_t dev; 79}; 80 81METHOD int resume { 82 device_t dev; 83}; 84