1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * container.c - ACPI Generic Container Driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2004 Anil S Keshavamurthy (anil.s.keshavamurthy@intel.com)
6*4882a593Smuzhiyun * Copyright (C) 2004 Keiichiro Tokunaga (tokunaga.keiich@jp.fujitsu.com)
7*4882a593Smuzhiyun * Copyright (C) 2004 Motoyuki Ito (motoyuki@soft.fujitsu.com)
8*4882a593Smuzhiyun * Copyright (C) 2004 FUJITSU LIMITED
9*4882a593Smuzhiyun * Copyright (C) 2004, 2013 Intel Corp.
10*4882a593Smuzhiyun * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
11*4882a593Smuzhiyun */
12*4882a593Smuzhiyun #include <linux/acpi.h>
13*4882a593Smuzhiyun #include <linux/container.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun #include "internal.h"
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun static const struct acpi_device_id container_device_ids[] = {
18*4882a593Smuzhiyun {"ACPI0004", 0},
19*4882a593Smuzhiyun {"PNP0A05", 0},
20*4882a593Smuzhiyun {"PNP0A06", 0},
21*4882a593Smuzhiyun {"", 0},
22*4882a593Smuzhiyun };
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun #ifdef CONFIG_ACPI_CONTAINER
25*4882a593Smuzhiyun
acpi_container_offline(struct container_dev * cdev)26*4882a593Smuzhiyun static int acpi_container_offline(struct container_dev *cdev)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun struct acpi_device *adev = ACPI_COMPANION(&cdev->dev);
29*4882a593Smuzhiyun struct acpi_device *child;
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun /* Check all of the dependent devices' physical companions. */
32*4882a593Smuzhiyun list_for_each_entry(child, &adev->children, node)
33*4882a593Smuzhiyun if (!acpi_scan_is_offline(child, false))
34*4882a593Smuzhiyun return -EBUSY;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun return 0;
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
acpi_container_release(struct device * dev)39*4882a593Smuzhiyun static void acpi_container_release(struct device *dev)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun kfree(to_container_dev(dev));
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
container_device_attach(struct acpi_device * adev,const struct acpi_device_id * not_used)44*4882a593Smuzhiyun static int container_device_attach(struct acpi_device *adev,
45*4882a593Smuzhiyun const struct acpi_device_id *not_used)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun struct container_dev *cdev;
48*4882a593Smuzhiyun struct device *dev;
49*4882a593Smuzhiyun int ret;
50*4882a593Smuzhiyun
51*4882a593Smuzhiyun if (adev->flags.is_dock_station)
52*4882a593Smuzhiyun return 0;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
55*4882a593Smuzhiyun if (!cdev)
56*4882a593Smuzhiyun return -ENOMEM;
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun cdev->offline = acpi_container_offline;
59*4882a593Smuzhiyun dev = &cdev->dev;
60*4882a593Smuzhiyun dev->bus = &container_subsys;
61*4882a593Smuzhiyun dev_set_name(dev, "%s", dev_name(&adev->dev));
62*4882a593Smuzhiyun ACPI_COMPANION_SET(dev, adev);
63*4882a593Smuzhiyun dev->release = acpi_container_release;
64*4882a593Smuzhiyun ret = device_register(dev);
65*4882a593Smuzhiyun if (ret) {
66*4882a593Smuzhiyun put_device(dev);
67*4882a593Smuzhiyun return ret;
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun adev->driver_data = dev;
70*4882a593Smuzhiyun return 1;
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun
container_device_detach(struct acpi_device * adev)73*4882a593Smuzhiyun static void container_device_detach(struct acpi_device *adev)
74*4882a593Smuzhiyun {
75*4882a593Smuzhiyun struct device *dev = acpi_driver_data(adev);
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun adev->driver_data = NULL;
78*4882a593Smuzhiyun if (dev)
79*4882a593Smuzhiyun device_unregister(dev);
80*4882a593Smuzhiyun }
81*4882a593Smuzhiyun
container_device_online(struct acpi_device * adev)82*4882a593Smuzhiyun static void container_device_online(struct acpi_device *adev)
83*4882a593Smuzhiyun {
84*4882a593Smuzhiyun struct device *dev = acpi_driver_data(adev);
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun kobject_uevent(&dev->kobj, KOBJ_ONLINE);
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun static struct acpi_scan_handler container_handler = {
90*4882a593Smuzhiyun .ids = container_device_ids,
91*4882a593Smuzhiyun .attach = container_device_attach,
92*4882a593Smuzhiyun .detach = container_device_detach,
93*4882a593Smuzhiyun .hotplug = {
94*4882a593Smuzhiyun .enabled = true,
95*4882a593Smuzhiyun .demand_offline = true,
96*4882a593Smuzhiyun .notify_online = container_device_online,
97*4882a593Smuzhiyun },
98*4882a593Smuzhiyun };
99*4882a593Smuzhiyun
acpi_container_init(void)100*4882a593Smuzhiyun void __init acpi_container_init(void)
101*4882a593Smuzhiyun {
102*4882a593Smuzhiyun acpi_scan_add_handler(&container_handler);
103*4882a593Smuzhiyun }
104*4882a593Smuzhiyun
105*4882a593Smuzhiyun #else
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun static struct acpi_scan_handler container_handler = {
108*4882a593Smuzhiyun .ids = container_device_ids,
109*4882a593Smuzhiyun };
110*4882a593Smuzhiyun
acpi_container_init(void)111*4882a593Smuzhiyun void __init acpi_container_init(void)
112*4882a593Smuzhiyun {
113*4882a593Smuzhiyun acpi_scan_add_handler_with_hotplug(&container_handler, "container");
114*4882a593Smuzhiyun }
115*4882a593Smuzhiyun
116*4882a593Smuzhiyun #endif /* CONFIG_ACPI_CONTAINER */
117