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Commit | Line | Data |
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1da177e4 LT |
1 | #include <linux/proc_fs.h> |
2 | #include <linux/seq_file.h> | |
214f2c90 | 3 | #include <linux/export.h> |
1da177e4 LT |
4 | #include <linux/suspend.h> |
5 | #include <linux/bcd.h> | |
8b48463f | 6 | #include <linux/acpi.h> |
1da177e4 LT |
7 | #include <asm/uaccess.h> |
8 | ||
1da177e4 LT |
9 | #include "sleep.h" |
10 | ||
1da177e4 | 11 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
43532c8a LB |
12 | |
13 | /* | |
14 | * this file provides support for: | |
43532c8a LB |
15 | * /proc/acpi/wakeup |
16 | */ | |
17 | ||
4be44fcd | 18 | ACPI_MODULE_NAME("sleep") |
1da177e4 | 19 | |
1da177e4 LT |
20 | static int |
21 | acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset) | |
22 | { | |
4be44fcd | 23 | struct list_head *node, *next; |
1da177e4 | 24 | |
8aa55591 | 25 | seq_printf(seq, "Device\tS-state\t Status Sysfs node\n"); |
1da177e4 | 26 | |
9090589d | 27 | mutex_lock(&acpi_device_lock); |
1da177e4 | 28 | list_for_each_safe(node, next, &acpi_wakeup_device_list) { |
4be44fcd LB |
29 | struct acpi_device *dev = |
30 | container_of(node, struct acpi_device, wakeup_list); | |
1033f904 | 31 | struct acpi_device_physical_node *entry; |
1da177e4 LT |
32 | |
33 | if (!dev->wakeup.flags.valid) | |
34 | continue; | |
8aa55591 | 35 | |
1033f904 | 36 | seq_printf(seq, "%s\t S%d\t", |
4be44fcd | 37 | dev->pnp.bus_id, |
1033f904 LT |
38 | (u32) dev->wakeup.sleep_state); |
39 | ||
623cf33c RW |
40 | mutex_lock(&dev->physical_node_lock); |
41 | ||
65ab96f6 | 42 | if (!dev->physical_node_count) { |
1033f904 | 43 | seq_printf(seq, "%c%-8s\n", |
65ab96f6 AF |
44 | dev->wakeup.flags.run_wake ? '*' : ' ', |
45 | device_may_wakeup(&dev->dev) ? | |
46 | "enabled" : "disabled"); | |
47 | } else { | |
1033f904 LT |
48 | struct device *ldev; |
49 | list_for_each_entry(entry, &dev->physical_node_list, | |
50 | node) { | |
51 | ldev = get_device(entry->dev); | |
52 | if (!ldev) | |
53 | continue; | |
54 | ||
55 | if (&entry->node != | |
56 | dev->physical_node_list.next) | |
57 | seq_printf(seq, "\t\t"); | |
58 | ||
59 | seq_printf(seq, "%c%-8s %s:%s\n", | |
60 | dev->wakeup.flags.run_wake ? '*' : ' ', | |
61 | (device_may_wakeup(&dev->dev) || | |
62 | (ldev && device_may_wakeup(ldev))) ? | |
63 | "enabled" : "disabled", | |
64 | ldev->bus ? ldev->bus->name : | |
65 | "no-bus", dev_name(ldev)); | |
66 | put_device(ldev); | |
67 | } | |
68 | } | |
623cf33c RW |
69 | |
70 | mutex_unlock(&dev->physical_node_lock); | |
1da177e4 | 71 | } |
9090589d | 72 | mutex_unlock(&acpi_device_lock); |
1da177e4 LT |
73 | return 0; |
74 | } | |
75 | ||
76acae04 RW |
76 | static void physical_device_enable_wakeup(struct acpi_device *adev) |
77 | { | |
1033f904 | 78 | struct acpi_device_physical_node *entry; |
76acae04 | 79 | |
623cf33c RW |
80 | mutex_lock(&adev->physical_node_lock); |
81 | ||
1033f904 LT |
82 | list_for_each_entry(entry, |
83 | &adev->physical_node_list, node) | |
84 | if (entry->dev && device_can_wakeup(entry->dev)) { | |
85 | bool enable = !device_may_wakeup(entry->dev); | |
86 | device_set_wakeup_enable(entry->dev, enable); | |
87 | } | |
623cf33c RW |
88 | |
89 | mutex_unlock(&adev->physical_node_lock); | |
76acae04 RW |
90 | } |
91 | ||
1da177e4 | 92 | static ssize_t |
4be44fcd LB |
93 | acpi_system_write_wakeup_device(struct file *file, |
94 | const char __user * buffer, | |
95 | size_t count, loff_t * ppos) | |
1da177e4 | 96 | { |
4be44fcd LB |
97 | struct list_head *node, *next; |
98 | char strbuf[5]; | |
99 | char str[5] = ""; | |
1da177e4 | 100 | |
05bce79e CR |
101 | if (count > 4) |
102 | count = 4; | |
1da177e4 | 103 | |
05bce79e | 104 | if (copy_from_user(strbuf, buffer, count)) |
1da177e4 | 105 | return -EFAULT; |
05bce79e | 106 | strbuf[count] = '\0'; |
1da177e4 LT |
107 | sscanf(strbuf, "%s", str); |
108 | ||
9090589d | 109 | mutex_lock(&acpi_device_lock); |
1da177e4 | 110 | list_for_each_safe(node, next, &acpi_wakeup_device_list) { |
4be44fcd LB |
111 | struct acpi_device *dev = |
112 | container_of(node, struct acpi_device, wakeup_list); | |
1da177e4 LT |
113 | if (!dev->wakeup.flags.valid) |
114 | continue; | |
115 | ||
116 | if (!strncmp(dev->pnp.bus_id, str, 4)) { | |
f2b56bc8 RW |
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 | } | |
1da177e4 LT |
123 | break; |
124 | } | |
125 | } | |
9090589d | 126 | mutex_unlock(&acpi_device_lock); |
1da177e4 LT |
127 | return count; |
128 | } | |
129 | ||
130 | static int | |
131 | acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file) | |
132 | { | |
4be44fcd | 133 | return single_open(file, acpi_system_wakeup_device_seq_show, |
d9dda78b | 134 | PDE_DATA(inode)); |
1da177e4 LT |
135 | } |
136 | ||
d7508032 | 137 | static const struct file_operations acpi_system_wakeup_device_fops = { |
cf7acfab | 138 | .owner = THIS_MODULE, |
4be44fcd LB |
139 | .open = acpi_system_wakeup_device_open_fs, |
140 | .read = seq_read, | |
141 | .write = acpi_system_write_wakeup_device, | |
142 | .llseek = seq_lseek, | |
143 | .release = single_release, | |
1da177e4 LT |
144 | }; |
145 | ||
9cee43e0 | 146 | int __init acpi_sleep_proc_init(void) |
1da177e4 | 147 | { |
c65ade4d | 148 | /* 'wakeup device' [R/W] */ |
cf7acfab DL |
149 | proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR, |
150 | acpi_root_dir, &acpi_system_wakeup_device_fops); | |
1da177e4 | 151 | |
1da177e4 LT |
152 | return 0; |
153 | } |