195b482a8SLen Brown #include <linux/proc_fs.h> 295b482a8SLen Brown #include <linux/seq_file.h> 3214f2c90SPaul Gortmaker #include <linux/export.h> 495b482a8SLen Brown #include <linux/suspend.h> 595b482a8SLen Brown #include <linux/bcd.h> 68b48463fSLv Zheng #include <linux/acpi.h> 795b482a8SLen Brown #include <asm/uaccess.h> 895b482a8SLen Brown 995b482a8SLen Brown #include "sleep.h" 106a368751SRashika #include "internal.h" 1195b482a8SLen Brown 1295b482a8SLen Brown #define _COMPONENT ACPI_SYSTEM_COMPONENT 1395b482a8SLen Brown 1495b482a8SLen Brown /* 1595b482a8SLen Brown * this file provides support for: 1695b482a8SLen Brown * /proc/acpi/wakeup 1795b482a8SLen Brown */ 1895b482a8SLen Brown 1995b482a8SLen Brown ACPI_MODULE_NAME("sleep") 2095b482a8SLen Brown 2195b482a8SLen Brown static int 2295b482a8SLen Brown acpi_system_wakeup_device_seq_show(struct seq_file *seq, void *offset) 2395b482a8SLen Brown { 2495b482a8SLen Brown struct list_head *node, *next; 2595b482a8SLen Brown 2695b482a8SLen Brown seq_printf(seq, "Device\tS-state\t Status Sysfs node\n"); 2795b482a8SLen Brown 289090589dSShaohua Li mutex_lock(&acpi_device_lock); 2995b482a8SLen Brown list_for_each_safe(node, next, &acpi_wakeup_device_list) { 3095b482a8SLen Brown struct acpi_device *dev = 3195b482a8SLen Brown container_of(node, struct acpi_device, wakeup_list); 321033f904SLan Tianyu struct acpi_device_physical_node *entry; 3395b482a8SLen Brown 3495b482a8SLen Brown if (!dev->wakeup.flags.valid) 3595b482a8SLen Brown continue; 3695b482a8SLen Brown 371033f904SLan Tianyu seq_printf(seq, "%s\t S%d\t", 3895b482a8SLen Brown dev->pnp.bus_id, 391033f904SLan Tianyu (u32) dev->wakeup.sleep_state); 4095b482a8SLen Brown 41623cf33cSRafael J. Wysocki mutex_lock(&dev->physical_node_lock); 42623cf33cSRafael J. Wysocki 4365ab96f6SAndreas Fleig if (!dev->physical_node_count) { 441033f904SLan Tianyu seq_printf(seq, "%c%-8s\n", 4565ab96f6SAndreas Fleig dev->wakeup.flags.run_wake ? '*' : ' ', 4665ab96f6SAndreas Fleig device_may_wakeup(&dev->dev) ? 4765ab96f6SAndreas Fleig "enabled" : "disabled"); 4865ab96f6SAndreas Fleig } else { 491033f904SLan Tianyu struct device *ldev; 501033f904SLan Tianyu list_for_each_entry(entry, &dev->physical_node_list, 511033f904SLan Tianyu node) { 521033f904SLan Tianyu ldev = get_device(entry->dev); 531033f904SLan Tianyu if (!ldev) 541033f904SLan Tianyu continue; 551033f904SLan Tianyu 561033f904SLan Tianyu if (&entry->node != 571033f904SLan Tianyu dev->physical_node_list.next) 581033f904SLan Tianyu seq_printf(seq, "\t\t"); 591033f904SLan Tianyu 601033f904SLan Tianyu seq_printf(seq, "%c%-8s %s:%s\n", 611033f904SLan Tianyu dev->wakeup.flags.run_wake ? '*' : ' ', 621033f904SLan Tianyu (device_may_wakeup(&dev->dev) || 63085ca117SDan Carpenter device_may_wakeup(ldev)) ? 641033f904SLan Tianyu "enabled" : "disabled", 651033f904SLan Tianyu ldev->bus ? ldev->bus->name : 661033f904SLan Tianyu "no-bus", dev_name(ldev)); 671033f904SLan Tianyu put_device(ldev); 681033f904SLan Tianyu } 691033f904SLan Tianyu } 70623cf33cSRafael J. Wysocki 71623cf33cSRafael J. Wysocki mutex_unlock(&dev->physical_node_lock); 7295b482a8SLen Brown } 739090589dSShaohua Li mutex_unlock(&acpi_device_lock); 7495b482a8SLen Brown return 0; 7595b482a8SLen Brown } 7695b482a8SLen Brown 7795b482a8SLen Brown static void physical_device_enable_wakeup(struct acpi_device *adev) 7895b482a8SLen Brown { 791033f904SLan Tianyu struct acpi_device_physical_node *entry; 8095b482a8SLen Brown 81623cf33cSRafael J. Wysocki mutex_lock(&adev->physical_node_lock); 82623cf33cSRafael J. Wysocki 831033f904SLan Tianyu list_for_each_entry(entry, 841033f904SLan Tianyu &adev->physical_node_list, node) 851033f904SLan Tianyu if (entry->dev && device_can_wakeup(entry->dev)) { 861033f904SLan Tianyu bool enable = !device_may_wakeup(entry->dev); 871033f904SLan Tianyu device_set_wakeup_enable(entry->dev, enable); 88f2b56bc8SRafael J. Wysocki } 89623cf33cSRafael J. Wysocki 90623cf33cSRafael J. Wysocki mutex_unlock(&adev->physical_node_lock); 9195b482a8SLen Brown } 9295b482a8SLen Brown 9395b482a8SLen Brown static ssize_t 9495b482a8SLen Brown acpi_system_write_wakeup_device(struct file *file, 9595b482a8SLen Brown const char __user * buffer, 9695b482a8SLen Brown size_t count, loff_t * ppos) 9795b482a8SLen Brown { 9895b482a8SLen Brown struct list_head *node, *next; 9995b482a8SLen Brown char strbuf[5]; 10095b482a8SLen Brown char str[5] = ""; 10195b482a8SLen Brown 10205bce79eSCyril Roelandt if (count > 4) 10305bce79eSCyril Roelandt count = 4; 10495b482a8SLen Brown 10505bce79eSCyril Roelandt if (copy_from_user(strbuf, buffer, count)) 10695b482a8SLen Brown return -EFAULT; 10705bce79eSCyril Roelandt strbuf[count] = '\0'; 10895b482a8SLen Brown sscanf(strbuf, "%s", str); 10995b482a8SLen Brown 1109090589dSShaohua Li mutex_lock(&acpi_device_lock); 11195b482a8SLen Brown list_for_each_safe(node, next, &acpi_wakeup_device_list) { 11295b482a8SLen Brown struct acpi_device *dev = 11395b482a8SLen Brown container_of(node, struct acpi_device, wakeup_list); 11495b482a8SLen Brown if (!dev->wakeup.flags.valid) 11595b482a8SLen Brown continue; 11695b482a8SLen Brown 11795b482a8SLen Brown if (!strncmp(dev->pnp.bus_id, str, 4)) { 118f2b56bc8SRafael J. Wysocki if (device_can_wakeup(&dev->dev)) { 119f2b56bc8SRafael J. Wysocki bool enable = !device_may_wakeup(&dev->dev); 120f2b56bc8SRafael J. Wysocki device_set_wakeup_enable(&dev->dev, enable); 121f2b56bc8SRafael J. Wysocki } else { 12295b482a8SLen Brown physical_device_enable_wakeup(dev); 123f2b56bc8SRafael J. Wysocki } 124b014f4f1SRafael J. Wysocki break; 12595b482a8SLen Brown } 12695b482a8SLen Brown } 1279090589dSShaohua Li mutex_unlock(&acpi_device_lock); 12895b482a8SLen Brown return count; 12995b482a8SLen Brown } 13095b482a8SLen Brown 13195b482a8SLen Brown static int 13295b482a8SLen Brown acpi_system_wakeup_device_open_fs(struct inode *inode, struct file *file) 13395b482a8SLen Brown { 13495b482a8SLen Brown return single_open(file, acpi_system_wakeup_device_seq_show, 135d9dda78bSAl Viro PDE_DATA(inode)); 13695b482a8SLen Brown } 13795b482a8SLen Brown 13895b482a8SLen Brown static const struct file_operations acpi_system_wakeup_device_fops = { 13995b482a8SLen Brown .owner = THIS_MODULE, 14095b482a8SLen Brown .open = acpi_system_wakeup_device_open_fs, 14195b482a8SLen Brown .read = seq_read, 14295b482a8SLen Brown .write = acpi_system_write_wakeup_device, 14395b482a8SLen Brown .llseek = seq_lseek, 14495b482a8SLen Brown .release = single_release, 14595b482a8SLen Brown }; 14695b482a8SLen Brown 1479cee43e0SBjorn Helgaas int __init acpi_sleep_proc_init(void) 14895b482a8SLen Brown { 14995b482a8SLen Brown /* 'wakeup device' [R/W] */ 15095b482a8SLen Brown proc_create("wakeup", S_IFREG | S_IRUGO | S_IWUSR, 15195b482a8SLen Brown acpi_root_dir, &acpi_system_wakeup_device_fops); 15295b482a8SLen Brown 15395b482a8SLen Brown return 0; 15495b482a8SLen Brown } 155