blob: c8ead9f97375342130a43aed57487ead8363133b [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Rafael J. Wysocki68a67f62013-03-03 23:05:55 +01002 * container.c - ACPI Generic Container Driver
Linus Torvalds1da177e2005-04-16 15:20:36 -07003 *
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)
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * Copyright (C) 2004 FUJITSU LIMITED
Rafael J. Wysocki68a67f62013-03-03 23:05:55 +01008 * Copyright (C) 2004, 2013 Intel Corp.
9 * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -070010 *
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 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/acpi.h>
Rafael J. Wysockicaa73ea2013-12-29 15:25:48 +010030#include <linux/container.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
Andy Shevchenko2f9b06f2013-03-11 09:17:07 +000032#include "internal.h"
33
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#define _COMPONENT ACPI_CONTAINER_COMPONENT
Len Brownf52fd662007-02-12 22:42:12 -050035ACPI_MODULE_NAME("container");
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
Thomas Renninger1ba90e32007-07-23 14:44:41 +020037static const struct acpi_device_id container_device_ids[] = {
38 {"ACPI0004", 0},
39 {"PNP0A05", 0},
40 {"PNP0A06", 0},
41 {"", 0},
42};
Thomas Renninger1ba90e32007-07-23 14:44:41 +020043
Rafael J. Wysockia1ec6572014-05-30 04:28:20 +020044#ifdef CONFIG_ACPI_CONTAINER
45
Rafael J. Wysockicaa73ea2013-12-29 15:25:48 +010046static int acpi_container_offline(struct container_dev *cdev)
47{
48 struct acpi_device *adev = ACPI_COMPANION(&cdev->dev);
49 struct acpi_device *child;
50
51 /* Check all of the dependent devices' physical companions. */
52 list_for_each_entry(child, &adev->children, node)
53 if (!acpi_scan_is_offline(child, false))
54 return -EBUSY;
55
56 return 0;
57}
58
59static void acpi_container_release(struct device *dev)
60{
61 kfree(to_container_dev(dev));
62}
63
Rafael J. Wysocki46394fd2013-11-22 21:55:32 +010064static int container_device_attach(struct acpi_device *adev,
Rafael J. Wysocki737f1a92013-02-08 23:52:39 +010065 const struct acpi_device_id *not_used)
66{
Rafael J. Wysockicaa73ea2013-12-29 15:25:48 +010067 struct container_dev *cdev;
68 struct device *dev;
69 int ret;
70
Rafael J. Wysocki1e2380c2014-02-16 01:51:01 +010071 if (adev->flags.is_dock_station)
72 return 0;
73
Rafael J. Wysockicaa73ea2013-12-29 15:25:48 +010074 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
75 if (!cdev)
76 return -ENOMEM;
77
78 cdev->offline = acpi_container_offline;
79 dev = &cdev->dev;
80 dev->bus = &container_subsys;
81 dev_set_name(dev, "%s", dev_name(&adev->dev));
82 ACPI_COMPANION_SET(dev, adev);
83 dev->release = acpi_container_release;
84 ret = device_register(dev);
Rafael J. Wysocki0f6aa092014-02-12 00:52:49 +010085 if (ret) {
86 put_device(dev);
Rafael J. Wysockicaa73ea2013-12-29 15:25:48 +010087 return ret;
Rafael J. Wysocki0f6aa092014-02-12 00:52:49 +010088 }
Rafael J. Wysockicaa73ea2013-12-29 15:25:48 +010089 adev->driver_data = dev;
Rafael J. Wysocki737f1a92013-02-08 23:52:39 +010090 return 1;
91}
92
Rafael J. Wysocki46394fd2013-11-22 21:55:32 +010093static void container_device_detach(struct acpi_device *adev)
94{
Rafael J. Wysockicaa73ea2013-12-29 15:25:48 +010095 struct device *dev = acpi_driver_data(adev);
96
97 adev->driver_data = NULL;
98 if (dev)
99 device_unregister(dev);
Rafael J. Wysocki46394fd2013-11-22 21:55:32 +0100100}
101
Rafael J. Wysocki8ab17fc2014-09-21 02:58:18 +0200102static void container_device_online(struct acpi_device *adev)
103{
104 struct device *dev = acpi_driver_data(adev);
105
106 kobject_uevent(&dev->kobj, KOBJ_ONLINE);
107}
108
Rafael J. Wysocki79917f32013-03-03 23:08:45 +0100109static struct acpi_scan_handler container_handler = {
Thomas Renninger1ba90e32007-07-23 14:44:41 +0200110 .ids = container_device_ids,
Rafael J. Wysocki737f1a92013-02-08 23:52:39 +0100111 .attach = container_device_attach,
Rafael J. Wysocki46394fd2013-11-22 21:55:32 +0100112 .detach = container_device_detach,
Rafael J. Wysocki68a67f62013-03-03 23:05:55 +0100113 .hotplug = {
114 .enabled = true,
Rafael J. Wysockicaa73ea2013-12-29 15:25:48 +0100115 .demand_offline = true,
Rafael J. Wysocki8ab17fc2014-09-21 02:58:18 +0200116 .notify_online = container_device_online,
Rafael J. Wysocki68a67f62013-03-03 23:05:55 +0100117 },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118};
119
Rafael J. Wysocki737f1a92013-02-08 23:52:39 +0100120void __init acpi_container_init(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121{
Rafael J. Wysockia1ec6572014-05-30 04:28:20 +0200122 acpi_scan_add_handler(&container_handler);
123}
124
125#else
126
127static struct acpi_scan_handler container_handler = {
128 .ids = container_device_ids,
129};
130
131void __init acpi_container_init(void)
132{
Rafael J. Wysocki79917f32013-03-03 23:08:45 +0100133 acpi_scan_add_handler_with_hotplug(&container_handler, "container");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134}
Rafael J. Wysockia1ec6572014-05-30 04:28:20 +0200135
136#endif /* CONFIG_ACPI_CONTAINER */