1/* $NetBSD$ */ 2 3/* 4 * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__KERNEL_RCSID(0, "$NetBSD: subr_autoconf.c,v 1.199 2010/01/19 21:54:53 dyoung Exp $"); 31 32#include <sys/param.h> 33#include <sys/device.h> 34#include <sys/systm.h> 35 36/* 37 * Accessor functions for the device_t type. 38 */ 39devclass_t 40device_class(device_t dev) 41{ 42 43 return dev->dv_class; 44} 45 46cfdata_t 47device_cfdata(device_t dev) 48{ 49 50 return dev->dv_cfdata; 51} 52 53cfdriver_t 54device_cfdriver(device_t dev) 55{ 56 57 return dev->dv_cfdriver; 58} 59 60cfattach_t 61device_cfattach(device_t dev) 62{ 63 64 return dev->dv_cfattach; 65} 66 67int 68device_unit(device_t dev) 69{ 70 71 return dev->dv_unit; 72} 73 74const char * 75device_xname(device_t dev) 76{ 77 78 return dev->dv_xname; 79} 80 81device_t 82device_parent(device_t dev) 83{ 84 85 return dev->dv_parent; 86} 87 88bool 89device_activation(device_t dev, devact_level_t level) 90{ 91 int active_flags; 92 93 active_flags = DVF_ACTIVE; 94 switch (level) { 95 case DEVACT_LEVEL_FULL: 96 active_flags |= DVF_CLASS_SUSPENDED; 97 /*FALLTHROUGH*/ 98 case DEVACT_LEVEL_DRIVER: 99 active_flags |= DVF_DRIVER_SUSPENDED; 100 /*FALLTHROUGH*/ 101 case DEVACT_LEVEL_BUS: 102 active_flags |= DVF_BUS_SUSPENDED; 103 break; 104 } 105 106 return (dev->dv_flags & active_flags) == DVF_ACTIVE; 107} 108 109bool 110device_is_active(device_t dev) 111{ 112 int active_flags; 113 114 active_flags = DVF_ACTIVE; 115 active_flags |= DVF_CLASS_SUSPENDED; 116 active_flags |= DVF_DRIVER_SUSPENDED; 117 active_flags |= DVF_BUS_SUSPENDED; 118 119 return (dev->dv_flags & active_flags) == DVF_ACTIVE; 120} 121 122bool 123device_is_enabled(device_t dev) 124{ 125 return (dev->dv_flags & DVF_ACTIVE) == DVF_ACTIVE; 126} 127 128bool 129device_has_power(device_t dev) 130{ 131 int active_flags; 132 133 active_flags = DVF_ACTIVE | DVF_BUS_SUSPENDED; 134 135 return (dev->dv_flags & active_flags) == DVF_ACTIVE; 136} 137 138int 139device_locator(device_t dev, u_int locnum) 140{ 141 142 KASSERT(dev->dv_locators != NULL); 143 return dev->dv_locators[locnum]; 144} 145 146void * 147device_private(device_t dev) 148{ 149 150 /* 151 * The reason why device_private(NULL) is allowed is to simplify the 152 * work of a lot of userspace request handlers (i.e., c/bdev 153 * handlers) which grab cfdriver_t->cd_units[n]. 154 * It avoids having them test for it to be NULL and only then calling 155 * device_private. 156 */ 157 return dev == NULL ? NULL : dev->dv_private; 158} 159 160prop_dictionary_t 161device_properties(device_t dev) 162{ 163 164 return dev->dv_properties; 165} 166 167/* 168 * device_is_a: 169 * 170 * Returns true if the device is an instance of the specified 171 * driver. 172 */ 173bool 174device_is_a(device_t dev, const char *dname) 175{ 176 177 return strcmp(dev->dv_cfdriver->cd_name, dname) == 0; 178} 179