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 acpi_container_offline(struct container_dev *cdev)
27{
28 struct acpi_device *adev = ACPI_COMPANION(&cdev->dev);
29 struct acpi_device *child;
30
31 /* Check all of the dependent devices' physical companions. */
32 list_for_each_entry(child, &adev->children, node)
33 if (!acpi_scan_is_offline(child, false))
34 return -EBUSY;
35
36 return 0;
37}
38
39static void acpi_container_release(struct device *dev)
40{
41 kfree(to_container_dev(dev));
42}
43
44static int container_device_attach(struct acpi_device *adev,
45 const struct acpi_device_id *not_used)
46{
47 struct container_dev *cdev;
48 struct device *dev;
49 int ret;
50
51 if (adev->flags.is_dock_station)
52 return 0;
53
54 cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
55 if (!cdev)
56 return -ENOMEM;
57
58 cdev->offline = acpi_container_offline;
59 dev = &cdev->dev;
60 dev->bus = &container_subsys;
61 dev_set_name(dev, "%s", dev_name(&adev->dev));
62 ACPI_COMPANION_SET(dev, adev);
63 dev->release = acpi_container_release;
64 ret = device_register(dev);
65 if (ret) {
66 put_device(dev);
67 return ret;
68 }
69 adev->driver_data = dev;
70 return 1;
71}
72
73static void container_device_detach(struct acpi_device *adev)
74{
75 struct device *dev = acpi_driver_data(adev);
76
77 adev->driver_data = NULL;
78 if (dev)
79 device_unregister(dev);
80}
81
82static void container_device_online(struct acpi_device *adev)
83{
84 struct device *dev = acpi_driver_data(adev);
85
86 kobject_uevent(&dev->kobj, KOBJ_ONLINE);
87}
88
89static struct acpi_scan_handler container_handler = {
90 .ids = container_device_ids,
91 .attach = container_device_attach,
92 .detach = container_device_detach,
93 .hotplug = {
94 .enabled = true,
95 .demand_offline = true,
96 .notify_online = container_device_online,
97 },
98};
99
100void __init acpi_container_init(void)
101{
102 acpi_scan_add_handler(&container_handler);
103}
104
105#else
106
107static struct acpi_scan_handler container_handler = {
108 .ids = container_device_ids,
109};
110
111void __init acpi_container_init(void)
112{
113 acpi_scan_add_handler_with_hotplug(&container_handler, "container");
114}
115
116#endif /* CONFIG_ACPI_CONTAINER */