FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/acpi_if.m

     #-
     # Copyright (c) 2004 Nate Lawson
     # 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/types.h>
    #include "acpi.h"
    
    INTERFACE acpi;
    
    #
    # Callback function for each child handle traversed in acpi_scan_children().
    #
    # ACPI_HANDLE h:  current child device being considered
    #
    # device_t *dev:  pointer to the child's original device_t or NULL if there
    #   was none.  The callback should store a new device in *dev if it has
    #   created one.  The method implementation will automatically clean up the
    #   previous device and properly associate the current ACPI_HANDLE with it.
    #
    # level:  current level being scanned
    #
    # void *arg:  argument passed in original call to acpi_scan_children()
    #
    # Returns:  AE_OK if the scan should continue, otherwise an error
    #
    HEADER {
            typedef ACPI_STATUS (*acpi_scan_cb_t)(ACPI_HANDLE h, device_t *dev,
                int level, void *arg);
    };
    
    #
    # Default implementation for acpi_id_probe().
    #
    CODE {
            static char *
            acpi_generic_id_probe(device_t bus, device_t dev, char **ids)
            {
                    return (NULL);
            }
    };
    
    #
    # Check a device for a match in a list of ID strings.  The strings can be
    # EISA PNP IDs or ACPI _HID/_CID values.
    #
    # device_t bus:  parent bus for the device
    #
    # device_t dev:  device being considered
    #
    # char **ids:  array of ID strings to consider
    #
    # Returns:  ID string matched or NULL if no match
    #
    METHOD char * id_probe {
            device_t        bus;
            device_t        dev;
            char            **ids;
    } DEFAULT acpi_generic_id_probe;
    
    #
    # Evaluate an ACPI method or object, given its path.
    #
    # device_t bus:  parent bus for the device
    #
    # device_t dev:  evaluate the object relative to this device's handle.
    #   Specify NULL to begin the search at the ACPI root.
    #
    # ACPI_STRING pathname:  absolute or relative path to this object
    #
    # ACPI_OBJECT_LIST *parameters:  array of arguments to pass to the object.
    #   Specify NULL if there are none.
    #
    # ACPI_BUFFER *ret:  the result (if any) of the evaluation
    #   Specify NULL if there is none.
   #
   # Returns:  AE_OK or an error value
   #
   METHOD ACPI_STATUS evaluate_object {
           device_t        bus;
           device_t        dev;
           ACPI_STRING     pathname;
           ACPI_OBJECT_LIST *parameters;
           ACPI_BUFFER     *ret;
   };
   
   #
   # Get the highest power state (D0-D3) that is usable for a device when
   # suspending/resuming.  If a bus calls this when suspending a device, it
   # must also call it when resuming.
   #
   # device_t bus:  parent bus for the device
   #
   # device_t dev:  check this device's appropriate power state
   #
   # int *dstate:  if successful, contains the highest valid sleep state
   #
   # Returns:  0 on success, ESRCH if device has no special state, or
   #   some other error value.
   #
   METHOD int pwr_for_sleep {
           device_t        bus;
           device_t        dev;
           int             *dstate;
   };
   
   #
   # Rescan a subtree and optionally reattach devices to handles.  Users
   # specify a callback that is called for each ACPI_HANDLE of type Device
   # that is a child of "dev".
   #
   # device_t bus:  parent bus for the device
   #
   # device_t dev:  begin the scan starting with this device's handle.
   #   Specify NULL to begin the scan at the ACPI root.
   # 
   # int max_depth:  number of levels to traverse (i.e., 1 means just the
   #   immediate children.
   #
   # acpi_scan_cb_t user_fn:  called for each child handle
   #
   # void *arg:  argument to pass to the callback function
   #
   # Returns:  AE_OK or an error value, based on the callback return value
   #
   METHOD ACPI_STATUS scan_children {
           device_t        bus;
           device_t        dev;
           int             max_depth;
           acpi_scan_cb_t  user_fn;
           void            *arg;
   };
   
   #
   # Query a given driver for its supported feature(s).  This should be
   # called by the parent bus before the driver is probed.
   #
   # driver_t *driver:  child driver
   #
   # u_int *features:  returned bitmask of all supported features
   #
   STATICMETHOD int get_features {
           driver_t        *driver;
           u_int           *features;
   };

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