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1// SPDX-License-Identifier: GPL-2.0
2#include <linux/proc_fs.h>
3#include <linux/seq_file.h>
4#include <linux/export.h>
5#include <linux/suspend.h>
6#include <linux/bcd.h>
7#include <linux/acpi.h>
8#include <linux/uaccess.h>
9
10#include "sleep.h"
11#include "internal.h"
12
13#define _COMPONENT ACPI_SYSTEM_COMPONENT
14
15/*
16 * this file provides support for:
17 * /proc/acpi/wakeup
18 */
19
20ACPI_MODULE_NAME("sleep")
21
22static int
23acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
24{
25 struct acpi_device *dev, *tmp;
26
27 seq_printf(seq, "Device\tS-state\t Status Sysfs node\n");
28
29 mutex_lock(&acpi_device_lock);
30 list_for_each_entry_safe(dev, tmp, &acpi_wakeup_device_list,
31 wakeup_list) {
32 struct acpi_device_physical_node *entry;
33
34 if (!dev->wakeup.flags.valid)
35 continue;
36
37 seq_printf(seq, "%s\t S%d\t",
38 dev->pnp.bus_id,
39 (u32) dev->wakeup.sleep_state);
40
41 mutex_lock(&dev->physical_node_lock);
42
43 if (!dev->physical_node_count) {
44 seq_printf(seq, "%c%-8s\n",
45 dev->wakeup.flags.valid ? '*' : ' ',
46 device_may_wakeup(&dev->dev) ?
47 "enabled" : "disabled");
48 } else {
49 struct device *ldev;
50 list_for_each_entry(entry, &dev->physical_node_list,
51 node) {
52 ldev = get_device(entry->dev);
53 if (!ldev)
54 continue;
55
56 if (&entry->node !=
57 dev->physical_node_list.next)
58 seq_printf(seq, "\t\t");
59
60 seq_printf(seq, "%c%-8s %s:%s\n",
61 dev->wakeup.flags.valid ? '*' : ' ',
62 (device_may_wakeup(&dev->dev) ||
63 device_may_wakeup(ldev)) ?
64 "enabled" : "disabled",
65 ldev->bus ? ldev->bus->name :
66 "no-bus", dev_name(ldev));
67 put_device(ldev);
68 }
69 }
70
71 mutex_unlock(&dev->physical_node_lock);
72 }
73 mutex_unlock(&acpi_device_lock);
74 return 0;
75}
76
77static void physical_device_enable_wakeup(struct acpi_device *adev)
78{
79 struct acpi_device_physical_node *entry;
80
81 mutex_lock(&adev->physical_node_lock);
82
83 list_for_each_entry(entry,
84 &adev->physical_node_list, node)
85 if (entry->dev && device_can_wakeup(entry->dev)) {
86 bool enable = !device_may_wakeup(entry->dev);
87 device_set_wakeup_enable(entry->dev, enable);
88 }
89
90 mutex_unlock(&adev->physical_node_lock);
91}
92
93static ssize_t
94acpi_system_write_wakeup_device(struct file *file,
95 const char __user * buffer,
96 size_t count, loff_t * ppos)
97{
98 struct acpi_device *dev, *tmp;
99 char strbuf[5];
100 char str[5] = "";
101
102 if (count > 4)
103 count = 4;
104
105 if (copy_from_user(strbuf, buffer, count))
106 return -EFAULT;
107 strbuf[count] = '\0';
108 sscanf(strbuf, "%s", str);
109
110 mutex_lock(&acpi_device_lock);
111 list_for_each_entry_safe(dev, tmp, &acpi_wakeup_device_list,
112 wakeup_list) {
113 if (!dev->wakeup.flags.valid)
114 continue;
115
116 if (!strncmp(dev->pnp.bus_id, str, 4)) {
117 if (device_can_wakeup(&dev->dev)) {
118 bool enable = !device_may_wakeup(&dev->dev);
119 device_set_wakeup_enable(&dev->dev, enable);
120 } else {
121 physical_device_enable_wakeup(dev);
122 }
123 break;
124 }
125 }
126 mutex_unlock(&acpi_device_lock);
127 return count;
128}
129
130static int
131acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file)
132{
133 return single_open(file, acpi_system_wakeup_device_seq_show,
134 PDE_DATA(inode));
135}
136
137static const struct proc_ops acpi_system_wakeup_device_proc_ops = {
138 .proc_open = acpi_system_wakeup_device_open_fs,
139 .proc_read = seq_read,
140 .proc_write = acpi_system_write_wakeup_device,
141 .proc_lseek = seq_lseek,
142 .proc_release = single_release,
143};
144
145void __init acpi_sleep_proc_init(void)
146{
147 /* 'wakeup device' [R/W] */
148 proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR,
149 acpi_root_dir, &acpi_system_wakeup_device_proc_ops);
150}
1// SPDX-License-Identifier: GPL-2.0
2#include <linux/proc_fs.h>
3#include <linux/seq_file.h>
4#include <linux/export.h>
5#include <linux/suspend.h>
6#include <linux/bcd.h>
7#include <linux/acpi.h>
8#include <linux/uaccess.h>
9
10#include "sleep.h"
11#include "internal.h"
12
13#define _COMPONENT ACPI_SYSTEM_COMPONENT
14
15/*
16 * this file provides support for:
17 * /proc/acpi/wakeup
18 */
19
20ACPI_MODULE_NAME("sleep")
21
22static int
23acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
24{
25 struct list_head *node, *next;
26
27 seq_printf(seq, "Device\tS-state\t Status Sysfs node\n");
28
29 mutex_lock(&acpi_device_lock);
30 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
31 struct acpi_device *dev =
32 container_of(node, struct acpi_device, wakeup_list);
33 struct acpi_device_physical_node *entry;
34
35 if (!dev->wakeup.flags.valid)
36 continue;
37
38 seq_printf(seq, "%s\t S%d\t",
39 dev->pnp.bus_id,
40 (u32) dev->wakeup.sleep_state);
41
42 mutex_lock(&dev->physical_node_lock);
43
44 if (!dev->physical_node_count) {
45 seq_printf(seq, "%c%-8s\n",
46 dev->wakeup.flags.valid ? '*' : ' ',
47 device_may_wakeup(&dev->dev) ?
48 "enabled" : "disabled");
49 } else {
50 struct device *ldev;
51 list_for_each_entry(entry, &dev->physical_node_list,
52 node) {
53 ldev = get_device(entry->dev);
54 if (!ldev)
55 continue;
56
57 if (&entry->node !=
58 dev->physical_node_list.next)
59 seq_printf(seq, "\t\t");
60
61 seq_printf(seq, "%c%-8s %s:%s\n",
62 dev->wakeup.flags.valid ? '*' : ' ',
63 (device_may_wakeup(&dev->dev) ||
64 device_may_wakeup(ldev)) ?
65 "enabled" : "disabled",
66 ldev->bus ? ldev->bus->name :
67 "no-bus", dev_name(ldev));
68 put_device(ldev);
69 }
70 }
71
72 mutex_unlock(&dev->physical_node_lock);
73 }
74 mutex_unlock(&acpi_device_lock);
75 return 0;
76}
77
78static void physical_device_enable_wakeup(struct acpi_device *adev)
79{
80 struct acpi_device_physical_node *entry;
81
82 mutex_lock(&adev->physical_node_lock);
83
84 list_for_each_entry(entry,
85 &adev->physical_node_list, node)
86 if (entry->dev && device_can_wakeup(entry->dev)) {
87 bool enable = !device_may_wakeup(entry->dev);
88 device_set_wakeup_enable(entry->dev, enable);
89 }
90
91 mutex_unlock(&adev->physical_node_lock);
92}
93
94static ssize_t
95acpi_system_write_wakeup_device(struct file *file,
96 const char __user * buffer,
97 size_t count, loff_t * ppos)
98{
99 struct list_head *node, *next;
100 char strbuf[5];
101 char str[5] = "";
102
103 if (count > 4)
104 count = 4;
105
106 if (copy_from_user(strbuf, buffer, count))
107 return -EFAULT;
108 strbuf[count] = '\0';
109 sscanf(strbuf, "%s", str);
110
111 mutex_lock(&acpi_device_lock);
112 list_for_each_safe(node, next, &acpi_wakeup_device_list) {
113 struct acpi_device *dev =
114 container_of(node, struct acpi_device, wakeup_list);
115 if (!dev->wakeup.flags.valid)
116 continue;
117
118 if (!strncmp(dev->pnp.bus_id, str, 4)) {
119 if (device_can_wakeup(&dev->dev)) {
120 bool enable = !device_may_wakeup(&dev->dev);
121 device_set_wakeup_enable(&dev->dev, enable);
122 } else {
123 physical_device_enable_wakeup(dev);
124 }
125 break;
126 }
127 }
128 mutex_unlock(&acpi_device_lock);
129 return count;
130}
131
132static int
133acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file)
134{
135 return single_open(file, acpi_system_wakeup_device_seq_show,
136 PDE_DATA(inode));
137}
138
139static const struct file_operations acpi_system_wakeup_device_fops = {
140 .owner = THIS_MODULE,
141 .open = acpi_system_wakeup_device_open_fs,
142 .read = seq_read,
143 .write = acpi_system_write_wakeup_device,
144 .llseek = seq_lseek,
145 .release = single_release,
146};
147
148void __init acpi_sleep_proc_init(void)
149{
150 /* 'wakeup device' [R/W] */
151 proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR,
152 acpi_root_dir, &acpi_system_wakeup_device_fops);
153}