Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15

Linux/drivers/acpi/container.c

  1 /*
  2  * container.c  - ACPI Generic Container Driver
  3  *
  4  * Copyright (C) 2004 Anil S Keshavamurthy (anil.s.keshavamurthy@intel.com)
  5  * Copyright (C) 2004 Keiichiro Tokunaga (tokunaga.keiich@jp.fujitsu.com)
  6  * Copyright (C) 2004 Motoyuki Ito (motoyuki@soft.fujitsu.com)
  7  * Copyright (C) 2004 FUJITSU LIMITED
  8  * Copyright (C) 2004, 2013 Intel Corp.
  9  * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
 10  *
 11  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 12  *
 13  *  This program is free software; you can redistribute it and/or modify
 14  *  it under the terms of the GNU General Public License as published by
 15  *  the Free Software Foundation; either version 2 of the License, or (at
 16  *  your option) any later version.
 17  *
 18  *  This program is distributed in the hope that it will be useful, but
 19  *  WITHOUT ANY WARRANTY; without even the implied warranty of
 20  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 21  *  General Public License for more details.
 22  *
 23  *  You should have received a copy of the GNU General Public License along
 24  *  with this program; if not, write to the Free Software Foundation, Inc.,
 25  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 26  *
 27  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 28  */
 29 #include <linux/acpi.h>
 30 #include <linux/container.h>
 31 
 32 #include "internal.h"
 33 
 34 #define _COMPONENT                      ACPI_CONTAINER_COMPONENT
 35 ACPI_MODULE_NAME("container");
 36 
 37 static const struct acpi_device_id container_device_ids[] = {
 38         {"ACPI0004", 0},
 39         {"PNP0A05", 0},
 40         {"PNP0A06", 0},
 41         {"", 0},
 42 };
 43 
 44 static int acpi_container_offline(struct container_dev *cdev)
 45 {
 46         struct acpi_device *adev = ACPI_COMPANION(&cdev->dev);
 47         struct acpi_device *child;
 48 
 49         /* Check all of the dependent devices' physical companions. */
 50         list_for_each_entry(child, &adev->children, node)
 51                 if (!acpi_scan_is_offline(child, false))
 52                         return -EBUSY;
 53 
 54         return 0;
 55 }
 56 
 57 static void acpi_container_release(struct device *dev)
 58 {
 59         kfree(to_container_dev(dev));
 60 }
 61 
 62 static int container_device_attach(struct acpi_device *adev,
 63                                    const struct acpi_device_id *not_used)
 64 {
 65         struct container_dev *cdev;
 66         struct device *dev;
 67         int ret;
 68 
 69         if (adev->flags.is_dock_station)
 70                 return 0;
 71 
 72         cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
 73         if (!cdev)
 74                 return -ENOMEM;
 75 
 76         cdev->offline = acpi_container_offline;
 77         dev = &cdev->dev;
 78         dev->bus = &container_subsys;
 79         dev_set_name(dev, "%s", dev_name(&adev->dev));
 80         ACPI_COMPANION_SET(dev, adev);
 81         dev->release = acpi_container_release;
 82         ret = device_register(dev);
 83         if (ret) {
 84                 put_device(dev);
 85                 return ret;
 86         }
 87         adev->driver_data = dev;
 88         return 1;
 89 }
 90 
 91 static void container_device_detach(struct acpi_device *adev)
 92 {
 93         struct device *dev = acpi_driver_data(adev);
 94 
 95         adev->driver_data = NULL;
 96         if (dev)
 97                 device_unregister(dev);
 98 }
 99 
100 static struct acpi_scan_handler container_handler = {
101         .ids = container_device_ids,
102         .attach = container_device_attach,
103         .detach = container_device_detach,
104         .hotplug = {
105                 .enabled = true,
106                 .demand_offline = true,
107         },
108 };
109 
110 void __init acpi_container_init(void)
111 {
112         acpi_scan_add_handler_with_hotplug(&container_handler, "container");
113 }
114 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us