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