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Commit | Line | Data |
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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 | 2 | /* |
68a67f6c | 3 | * container.c - ACPI Generic Container Driver |
1da177e4 LT |
4 | * |
5 | * Copyright (C) 2004 Anil S Keshavamurthy (anil.s.keshavamurthy@intel.com) | |
6 | * Copyright (C) 2004 Keiichiro Tokunaga (tokunaga.keiich@jp.fujitsu.com) | |
7 | * Copyright (C) 2004 Motoyuki Ito (motoyuki@soft.fujitsu.com) | |
1da177e4 | 8 | * Copyright (C) 2004 FUJITSU LIMITED |
68a67f6c RW |
9 | * Copyright (C) 2004, 2013 Intel Corp. |
10 | * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> | |
1da177e4 | 11 | */ |
1da177e4 | 12 | #include <linux/acpi.h> |
caa73ea1 | 13 | #include <linux/container.h> |
1da177e4 | 14 | |
2f9b06fc AS |
15 | #include "internal.h" |
16 | ||
1da177e4 | 17 | #define _COMPONENT ACPI_CONTAINER_COMPONENT |
f52fd66d | 18 | ACPI_MODULE_NAME("container"); |
1da177e4 | 19 | |
1ba90e3a TR |
20 | static const struct acpi_device_id container_device_ids[] = { |
21 | {"ACPI0004", 0}, | |
22 | {"PNP0A05", 0}, | |
23 | {"PNP0A06", 0}, | |
24 | {"", 0}, | |
25 | }; | |
1ba90e3a | 26 | |
a1ec6572 RW |
27 | #ifdef CONFIG_ACPI_CONTAINER |
28 | ||
caa73ea1 RW |
29 | static int acpi_container_offline(struct container_dev *cdev) |
30 | { | |
31 | struct acpi_device *adev = ACPI_COMPANION(&cdev->dev); | |
32 | struct acpi_device *child; | |
33 | ||
34 | /* Check all of the dependent devices' physical companions. */ | |
35 | list_for_each_entry(child, &adev->children, node) | |
36 | if (!acpi_scan_is_offline(child, false)) | |
37 | return -EBUSY; | |
38 | ||
39 | return 0; | |
40 | } | |
41 | ||
42 | static void acpi_container_release(struct device *dev) | |
43 | { | |
44 | kfree(to_container_dev(dev)); | |
45 | } | |
46 | ||
46394fd0 | 47 | static int container_device_attach(struct acpi_device *adev, |
737f1a9f RW |
48 | const struct acpi_device_id *not_used) |
49 | { | |
caa73ea1 RW |
50 | struct container_dev *cdev; |
51 | struct device *dev; | |
52 | int ret; | |
53 | ||
1e2380cd RW |
54 | if (adev->flags.is_dock_station) |
55 | return 0; | |
56 | ||
caa73ea1 RW |
57 | cdev = kzalloc(sizeof(*cdev), GFP_KERNEL); |
58 | if (!cdev) | |
59 | return -ENOMEM; | |
60 | ||
61 | cdev->offline = acpi_container_offline; | |
62 | dev = &cdev->dev; | |
63 | dev->bus = &container_subsys; | |
64 | dev_set_name(dev, "%s", dev_name(&adev->dev)); | |
65 | ACPI_COMPANION_SET(dev, adev); | |
66 | dev->release = acpi_container_release; | |
67 | ret = device_register(dev); | |
0f6aa09e RW |
68 | if (ret) { |
69 | put_device(dev); | |
caa73ea1 | 70 | return ret; |
0f6aa09e | 71 | } |
caa73ea1 | 72 | adev->driver_data = dev; |
737f1a9f RW |
73 | return 1; |
74 | } | |
75 | ||
46394fd0 RW |
76 | static void container_device_detach(struct acpi_device *adev) |
77 | { | |
caa73ea1 RW |
78 | struct device *dev = acpi_driver_data(adev); |
79 | ||
80 | adev->driver_data = NULL; | |
81 | if (dev) | |
82 | device_unregister(dev); | |
46394fd0 RW |
83 | } |
84 | ||
8ab17fc9 RW |
85 | static void container_device_online(struct acpi_device *adev) |
86 | { | |
87 | struct device *dev = acpi_driver_data(adev); | |
88 | ||
89 | kobject_uevent(&dev->kobj, KOBJ_ONLINE); | |
90 | } | |
91 | ||
79917f34 | 92 | static struct acpi_scan_handler container_handler = { |
1ba90e3a | 93 | .ids = container_device_ids, |
737f1a9f | 94 | .attach = container_device_attach, |
46394fd0 | 95 | .detach = container_device_detach, |
68a67f6c RW |
96 | .hotplug = { |
97 | .enabled = true, | |
caa73ea1 | 98 | .demand_offline = true, |
8ab17fc9 | 99 | .notify_online = container_device_online, |
68a67f6c | 100 | }, |
1da177e4 LT |
101 | }; |
102 | ||
a1ec6572 RW |
103 | void __init acpi_container_init(void) |
104 | { | |
105 | acpi_scan_add_handler(&container_handler); | |
106 | } | |
107 | ||
108 | #else | |
109 | ||
110 | static struct acpi_scan_handler container_handler = { | |
111 | .ids = container_device_ids, | |
112 | }; | |
113 | ||
737f1a9f | 114 | void __init acpi_container_init(void) |
1da177e4 | 115 | { |
79917f34 | 116 | acpi_scan_add_handler_with_hotplug(&container_handler, "container"); |
1da177e4 | 117 | } |
a1ec6572 RW |
118 | |
119 | #endif /* CONFIG_ACPI_CONTAINER */ |