1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0
295b482a8SLen Brown #include <linux/proc_fs.h>
395b482a8SLen Brown #include <linux/seq_file.h>
4214f2c90SPaul Gortmaker #include <linux/export.h>
595b482a8SLen Brown #include <linux/suspend.h>
695b482a8SLen Brown #include <linux/bcd.h>
78b48463fSLv Zheng #include <linux/acpi.h>
87c0f6ba6SLinus Torvalds #include <linux/uaccess.h>
995b482a8SLen Brown
1095b482a8SLen Brown #include "sleep.h"
116a368751SRashika #include "internal.h"
1295b482a8SLen Brown
1395b482a8SLen Brown /*
1495b482a8SLen Brown * this file provides support for:
1595b482a8SLen Brown * /proc/acpi/wakeup
1695b482a8SLen Brown */
1795b482a8SLen Brown
1895b482a8SLen Brown static int
acpi_system_wakeup_device_seq_show(struct seq_file * seq,void * offset)1995b482a8SLen Brown acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset)
2095b482a8SLen Brown {
2107761a4cSchenqiwu struct acpi_device *dev, *tmp;
2295b482a8SLen Brown
2395b482a8SLen Brown seq_printf(seq, "Device\tS-state\t Status Sysfs node\n");
2495b482a8SLen Brown
259090589dSShaohua Li mutex_lock(&acpi_device_lock);
2607761a4cSchenqiwu list_for_each_entry_safe(dev, tmp, &acpi_wakeup_device_list,
2707761a4cSchenqiwu wakeup_list) {
281033f904SLan Tianyu struct acpi_device_physical_node *entry;
2995b482a8SLen Brown
3095b482a8SLen Brown if (!dev->wakeup.flags.valid)
3195b482a8SLen Brown continue;
3295b482a8SLen Brown
331033f904SLan Tianyu seq_printf(seq, "%s\t S%d\t",
3495b482a8SLen Brown dev->pnp.bus_id,
351033f904SLan Tianyu (u32) dev->wakeup.sleep_state);
3695b482a8SLen Brown
37623cf33cSRafael J. Wysocki mutex_lock(&dev->physical_node_lock);
38623cf33cSRafael J. Wysocki
3965ab96f6SAndreas Fleig if (!dev->physical_node_count) {
401033f904SLan Tianyu seq_printf(seq, "%c%-8s\n",
41a1a66393SRafael J. Wysocki dev->wakeup.flags.valid ? '*' : ' ',
4265ab96f6SAndreas Fleig device_may_wakeup(&dev->dev) ?
4365ab96f6SAndreas Fleig "enabled" : "disabled");
4465ab96f6SAndreas Fleig } else {
451033f904SLan Tianyu struct device *ldev;
461033f904SLan Tianyu list_for_each_entry(entry, &dev->physical_node_list,
471033f904SLan Tianyu node) {
481033f904SLan Tianyu ldev = get_device(entry->dev);
491033f904SLan Tianyu if (!ldev)
501033f904SLan Tianyu continue;
511033f904SLan Tianyu
521033f904SLan Tianyu if (&entry->node !=
531033f904SLan Tianyu dev->physical_node_list.next)
541033f904SLan Tianyu seq_printf(seq, "\t\t");
551033f904SLan Tianyu
561033f904SLan Tianyu seq_printf(seq, "%c%-8s %s:%s\n",
57a1a66393SRafael J. Wysocki dev->wakeup.flags.valid ? '*' : ' ',
581033f904SLan Tianyu (device_may_wakeup(&dev->dev) ||
59085ca117SDan Carpenter device_may_wakeup(ldev)) ?
601033f904SLan Tianyu "enabled" : "disabled",
611033f904SLan Tianyu ldev->bus ? ldev->bus->name :
621033f904SLan Tianyu "no-bus", dev_name(ldev));
631033f904SLan Tianyu put_device(ldev);
641033f904SLan Tianyu }
651033f904SLan Tianyu }
66623cf33cSRafael J. Wysocki
67623cf33cSRafael J. Wysocki mutex_unlock(&dev->physical_node_lock);
6895b482a8SLen Brown }
699090589dSShaohua Li mutex_unlock(&acpi_device_lock);
7095b482a8SLen Brown return 0;
7195b482a8SLen Brown }
7295b482a8SLen Brown
physical_device_enable_wakeup(struct acpi_device * adev)7395b482a8SLen Brown static void physical_device_enable_wakeup(struct acpi_device *adev)
7495b482a8SLen Brown {
751033f904SLan Tianyu struct acpi_device_physical_node *entry;
7695b482a8SLen Brown
77623cf33cSRafael J. Wysocki mutex_lock(&adev->physical_node_lock);
78623cf33cSRafael J. Wysocki
791033f904SLan Tianyu list_for_each_entry(entry,
801033f904SLan Tianyu &adev->physical_node_list, node)
811033f904SLan Tianyu if (entry->dev && device_can_wakeup(entry->dev)) {
821033f904SLan Tianyu bool enable = !device_may_wakeup(entry->dev);
831033f904SLan Tianyu device_set_wakeup_enable(entry->dev, enable);
84f2b56bc8SRafael J. Wysocki }
85623cf33cSRafael J. Wysocki
86623cf33cSRafael J. Wysocki mutex_unlock(&adev->physical_node_lock);
8795b482a8SLen Brown }
8895b482a8SLen Brown
8995b482a8SLen Brown static ssize_t
acpi_system_write_wakeup_device(struct file * file,const char __user * buffer,size_t count,loff_t * ppos)9095b482a8SLen Brown acpi_system_write_wakeup_device(struct file *file,
9195b482a8SLen Brown const char __user * buffer,
9295b482a8SLen Brown size_t count, loff_t * ppos)
9395b482a8SLen Brown {
9407761a4cSchenqiwu struct acpi_device *dev, *tmp;
9595b482a8SLen Brown char strbuf[5];
9695b482a8SLen Brown char str[5] = "";
9795b482a8SLen Brown
9805bce79eSCyril Roelandt if (count > 4)
9905bce79eSCyril Roelandt count = 4;
10095b482a8SLen Brown
10105bce79eSCyril Roelandt if (copy_from_user(strbuf, buffer, count))
10295b482a8SLen Brown return -EFAULT;
10305bce79eSCyril Roelandt strbuf[count] = '\0';
10495b482a8SLen Brown sscanf(strbuf, "%s", str);
10595b482a8SLen Brown
1069090589dSShaohua Li mutex_lock(&acpi_device_lock);
10707761a4cSchenqiwu list_for_each_entry_safe(dev, tmp, &acpi_wakeup_device_list,
10807761a4cSchenqiwu wakeup_list) {
10995b482a8SLen Brown if (!dev->wakeup.flags.valid)
11095b482a8SLen Brown continue;
11195b482a8SLen Brown
11295b482a8SLen Brown if (!strncmp(dev->pnp.bus_id, str, 4)) {
113f2b56bc8SRafael J. Wysocki if (device_can_wakeup(&dev->dev)) {
114f2b56bc8SRafael J. Wysocki bool enable = !device_may_wakeup(&dev->dev);
115f2b56bc8SRafael J. Wysocki device_set_wakeup_enable(&dev->dev, enable);
116f2b56bc8SRafael J. Wysocki } else {
11795b482a8SLen Brown physical_device_enable_wakeup(dev);
118f2b56bc8SRafael J. Wysocki }
119b014f4f1SRafael J. Wysocki break;
12095b482a8SLen Brown }
12195b482a8SLen Brown }
1229090589dSShaohua Li mutex_unlock(&acpi_device_lock);
12395b482a8SLen Brown return count;
12495b482a8SLen Brown }
12595b482a8SLen Brown
12695b482a8SLen Brown static int
acpi_system_wakeup_device_open_fs(struct inode * inode,struct file * file)12795b482a8SLen Brown acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file)
12895b482a8SLen Brown {
12995b482a8SLen Brown return single_open(file, acpi_system_wakeup_device_seq_show,
130*359745d7SMuchun Song pde_data(inode));
13195b482a8SLen Brown }
13295b482a8SLen Brown
13397a32539SAlexey Dobriyan static const struct proc_ops acpi_system_wakeup_device_proc_ops = {
13497a32539SAlexey Dobriyan .proc_open = acpi_system_wakeup_device_open_fs,
13597a32539SAlexey Dobriyan .proc_read = seq_read,
13697a32539SAlexey Dobriyan .proc_write = acpi_system_write_wakeup_device,
13797a32539SAlexey Dobriyan .proc_lseek = seq_lseek,
13897a32539SAlexey Dobriyan .proc_release = single_release,
13995b482a8SLen Brown };
14095b482a8SLen Brown
acpi_sleep_proc_init(void)141f934c745SRami Rosen void __init acpi_sleep_proc_init(void)
14295b482a8SLen Brown {
14395b482a8SLen Brown /* 'wakeup device' [R/W] */
14495b482a8SLen Brown proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR,
14597a32539SAlexey Dobriyan acpi_root_dir, &acpi_system_wakeup_device_proc_ops);
14695b482a8SLen Brown }
147