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