Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | #include <linux/proc_fs.h> |
3 | #include <linux/seq_file.h> | |
214f2c90 | 4 | #include <linux/export.h> |
1da177e4 LT |
5 | #include <linux/suspend.h> |
6 | #include <linux/bcd.h> | |
8b48463f | 7 | #include <linux/acpi.h> |
7c0f6ba6 | 8 | #include <linux/uaccess.h> |
1da177e4 | 9 | |
1da177e4 | 10 | #include "sleep.h" |
6a368751 | 11 | #include "internal.h" |
1da177e4 | 12 | |
43532c8a LB |
13 | /* |
14 | * this file provides support for: | |
43532c8a LB |
15 | * /proc/acpi/wakeup |
16 | */ | |
17 | ||
1da177e4 LT |
18 | static int |
19 | acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset) | |
20 | { | |
07761a4c | 21 | struct acpi_device *dev, *tmp; |
1da177e4 | 22 | |
8aa55591 | 23 | seq_printf(seq, "Device\tS-state\t Status Sysfs node\n"); |
1da177e4 | 24 | |
9090589d | 25 | mutex_lock(&acpi_device_lock); |
07761a4c | 26 | list_for_each_entry_safe(dev, tmp, &acpi_wakeup_device_list, |
27 | wakeup_list) { | |
1033f904 | 28 | struct acpi_device_physical_node *entry; |
1da177e4 LT |
29 | |
30 | if (!dev->wakeup.flags.valid) | |
31 | continue; | |
8aa55591 | 32 | |
1033f904 | 33 | seq_printf(seq, "%s\t S%d\t", |
4be44fcd | 34 | dev->pnp.bus_id, |
1033f904 LT |
35 | (u32) dev->wakeup.sleep_state); |
36 | ||
623cf33c RW |
37 | mutex_lock(&dev->physical_node_lock); |
38 | ||
65ab96f6 | 39 | if (!dev->physical_node_count) { |
1033f904 | 40 | seq_printf(seq, "%c%-8s\n", |
a1a66393 | 41 | dev->wakeup.flags.valid ? '*' : ' ', |
65ab96f6 AF |
42 | device_may_wakeup(&dev->dev) ? |
43 | "enabled" : "disabled"); | |
44 | } else { | |
1033f904 LT |
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", | |
a1a66393 | 57 | dev->wakeup.flags.valid ? '*' : ' ', |
1033f904 | 58 | (device_may_wakeup(&dev->dev) || |
085ca117 | 59 | device_may_wakeup(ldev)) ? |
1033f904 LT |
60 | "enabled" : "disabled", |
61 | ldev->bus ? ldev->bus->name : | |
62 | "no-bus", dev_name(ldev)); | |
63 | put_device(ldev); | |
64 | } | |
65 | } | |
623cf33c RW |
66 | |
67 | mutex_unlock(&dev->physical_node_lock); | |
1da177e4 | 68 | } |
9090589d | 69 | mutex_unlock(&acpi_device_lock); |
1da177e4 LT |
70 | return 0; |
71 | } | |
72 | ||
76acae04 RW |
73 | static void physical_device_enable_wakeup(struct acpi_device *adev) |
74 | { | |
1033f904 | 75 | struct acpi_device_physical_node *entry; |
76acae04 | 76 | |
623cf33c RW |
77 | mutex_lock(&adev->physical_node_lock); |
78 | ||
1033f904 LT |
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 | } | |
623cf33c RW |
85 | |
86 | mutex_unlock(&adev->physical_node_lock); | |
76acae04 RW |
87 | } |
88 | ||
1da177e4 | 89 | static ssize_t |
4be44fcd LB |
90 | acpi_system_write_wakeup_device(struct file *file, |
91 | const char __user * buffer, | |
92 | size_t count, loff_t * ppos) | |
1da177e4 | 93 | { |
07761a4c | 94 | struct acpi_device *dev, *tmp; |
4be44fcd LB |
95 | char strbuf[5]; |
96 | char str[5] = ""; | |
1da177e4 | 97 | |
05bce79e CR |
98 | if (count > 4) |
99 | count = 4; | |
1da177e4 | 100 | |
05bce79e | 101 | if (copy_from_user(strbuf, buffer, count)) |
1da177e4 | 102 | return -EFAULT; |
05bce79e | 103 | strbuf[count] = '\0'; |
1da177e4 LT |
104 | sscanf(strbuf, "%s", str); |
105 | ||
9090589d | 106 | mutex_lock(&acpi_device_lock); |
07761a4c | 107 | list_for_each_entry_safe(dev, tmp, &acpi_wakeup_device_list, |
108 | wakeup_list) { | |
1da177e4 LT |
109 | if (!dev->wakeup.flags.valid) |
110 | continue; | |
111 | ||
112 | if (!strncmp(dev->pnp.bus_id, str, 4)) { | |
f2b56bc8 RW |
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 | } | |
1da177e4 LT |
119 | break; |
120 | } | |
121 | } | |
9090589d | 122 | mutex_unlock(&acpi_device_lock); |
1da177e4 LT |
123 | return count; |
124 | } | |
125 | ||
126 | static int | |
127 | acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file) | |
128 | { | |
4be44fcd | 129 | return single_open(file, acpi_system_wakeup_device_seq_show, |
359745d7 | 130 | pde_data(inode)); |
1da177e4 LT |
131 | } |
132 | ||
97a32539 AD |
133 | static 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, | |
1da177e4 LT |
139 | }; |
140 | ||
f934c745 | 141 | void __init acpi_sleep_proc_init(void) |
1da177e4 | 142 | { |
c65ade4d | 143 | /* 'wakeup device' [R/W] */ |
cf7acfab | 144 | proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR, |
97a32539 | 145 | acpi_root_dir, &acpi_system_wakeup_device_proc_ops); |
1da177e4 | 146 | } |