acpi_if.m revision 144629
1#- 2# Copyright (c) 2004 Nate Lawson 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# $FreeBSD: head/sys/dev/acpica/acpi_if.m 144629 2005-04-04 15:46:57Z njl $ 27# 28 29#include <sys/bus.h> 30#include <sys/types.h> 31#include "acpi.h" 32 33INTERFACE acpi; 34 35# 36# Callback function for each child handle traversed in acpi_scan_children(). 37# 38# ACPI_HANDLE h: current child device being considered 39# 40# device_t *dev: pointer to the child's original device_t or NULL if there 41# was none. The callback should store a new device in *dev if it has 42# created one. The method implementation will automatically clean up the 43# previous device and properly associate the current ACPI_HANDLE with it. 44# 45# level: current level being scanned 46# 47# void *arg: argument passed in original call to acpi_scan_children() 48# 49# Returns: AE_OK if the scan should continue, otherwise an error 50# 51HEADER { 52 typedef ACPI_STATUS (*acpi_scan_cb_t)(ACPI_HANDLE h, device_t *dev, 53 int level, void *arg); 54}; 55 56# 57# Default implementation for acpi_id_probe(). 58# 59CODE { 60 static char * 61 acpi_generic_id_probe(device_t bus, device_t dev, char **ids) 62 { 63 return (NULL); 64 } 65}; 66 67# 68# Check a device for a match in a list of ID strings. The strings can be 69# EISA PNP IDs or ACPI _HID/_CID values. 70# 71# device_t bus: parent bus for the device 72# 73# device_t dev: device being considered 74# 75# char **ids: array of ID strings to consider 76# 77# Returns: ID string matched or NULL if no match 78# 79METHOD char * id_probe { 80 device_t bus; 81 device_t dev; 82 char **ids; 83} DEFAULT acpi_generic_id_probe; 84 85# 86# Evaluate an ACPI method or object, given its path. 87# 88# device_t bus: parent bus for the device 89# 90# device_t dev: evaluate the object relative to this device's handle. 91# Specify NULL to begin the search at the ACPI root. 92# 93# ACPI_STRING pathname: absolute or relative path to this object 94# 95# ACPI_OBJECT_LIST *parameters: array of arguments to pass to the object. 96# Specify NULL if there are none. 97# 98# ACPI_BUFFER *ret: the result (if any) of the evaluation 99# Specify NULL if there is none. 100# 101# Returns: AE_OK or an error value 102# 103METHOD ACPI_STATUS evaluate_object { 104 device_t bus; 105 device_t dev; 106 ACPI_STRING pathname; 107 ACPI_OBJECT_LIST *parameters; 108 ACPI_BUFFER *ret; 109}; 110 111# 112# Get the highest power state (D0-D3) that is usable for a device when 113# suspending/resuming. If a bus calls this when suspending a device, it 114# must also call it when resuming. 115# 116# device_t bus: parent bus for the device 117# 118# device_t dev: check this device's appropriate power state 119# 120# int *dstate: if successful, contains the highest valid sleep state 121# 122# Returns: 0 on success, ESRCH if device has no special state, or 123# some other error value. 124# 125METHOD int pwr_for_sleep { 126 device_t bus; 127 device_t dev; 128 int *dstate; 129}; 130 131# 132# Rescan a subtree and optionally reattach devices to handles. Users 133# specify a callback that is called for each ACPI_HANDLE of type Device 134# that is a child of "dev". 135# 136# device_t bus: parent bus for the device 137# 138# device_t dev: begin the scan starting with this device's handle. 139# Specify NULL to begin the scan at the ACPI root. 140# 141# int max_depth: number of levels to traverse (i.e., 1 means just the 142# immediate children. 143# 144# acpi_scan_cb_t user_fn: called for each child handle 145# 146# void *arg: argument to pass to the callback function 147# 148# Returns: AE_OK or an error value, based on the callback return value 149# 150METHOD ACPI_STATUS scan_children { 151 device_t bus; 152 device_t dev; 153 int max_depth; 154 acpi_scan_cb_t user_fn; 155 void *arg; 156}; 157 158# 159# Query a given driver for its supported feature(s). This should be 160# called by the parent bus before the driver is probed. 161# 162# driver_t *driver: child driver 163# 164# u_int *features: returned bitmask of all supported features 165# 166STATICMETHOD int get_features { 167 driver_t *driver; 168 u_int *features; 169}; 170 171# 172# Read embedded controller (EC) address space 173# 174# device_t dev: EC device 175# u_int addr: Address to read from in EC space 176# ACPI_INTEGER *val: Location to store read value 177# int width: Size of area to read in bytes 178# 179METHOD int ec_read { 180 device_t dev; 181 u_int addr; 182 ACPI_INTEGER *val; 183 int width; 184}; 185 186# 187# Write embedded controller (EC) address space 188# 189# device_t dev: EC device 190# u_int addr: Address to write to in EC space 191# ACPI_INTEGER val: Value to write 192# int width: Size of value to write in bytes 193# 194METHOD int ec_write { 195 device_t dev; 196 u_int addr; 197 ACPI_INTEGER val; 198 int width; 199}; 200