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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/*
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
35ACPI_MODULE_NAME("container");
36
37static const struct acpi_device_id container_device_ids[] = {
38 {"ACPI0004", 0},
39 {"PNP0A05", 0},
40 {"PNP0A06", 0},
41 {"", 0},
42};
43
44static 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
57static void acpi_container_release(struct device *dev)
58{
59 kfree(to_container_dev(dev));
60}
61
62static 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
91static 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
100static 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
110void __init acpi_container_init(void)
111{
112 acpi_scan_add_handler_with_hotplug(&container_handler, "container");
113}