195b482a8SLen Brown /* 295b482a8SLen Brown * wakeup.c - support wakeup devices 395b482a8SLen Brown * Copyright (C) 2004 Li Shaohua <shaohua.li@intel.com> 495b482a8SLen Brown */ 595b482a8SLen Brown 695b482a8SLen Brown #include <linux/init.h> 795b482a8SLen Brown #include <linux/acpi.h> 895b482a8SLen Brown #include <acpi/acpi_drivers.h> 995b482a8SLen Brown #include <linux/kernel.h> 1095b482a8SLen Brown #include <linux/types.h> 11e60cc7a6SBjorn Helgaas 12e60cc7a6SBjorn Helgaas #include "internal.h" 1395b482a8SLen Brown #include "sleep.h" 1495b482a8SLen Brown 1595b482a8SLen Brown #define _COMPONENT ACPI_SYSTEM_COMPONENT 1695b482a8SLen Brown ACPI_MODULE_NAME("wakeup_devices") 1795b482a8SLen Brown 1895b482a8SLen Brown extern struct list_head acpi_wakeup_device_list; 1995b482a8SLen Brown extern spinlock_t acpi_device_lock; 2095b482a8SLen Brown 2195b482a8SLen Brown /** 2295b482a8SLen Brown * acpi_enable_wakeup_device_prep - prepare wakeup devices 2395b482a8SLen Brown * @sleep_state: ACPI state 2495b482a8SLen Brown * Enable all wakup devices power if the devices' wakeup level 2595b482a8SLen Brown * is higher than requested sleep level 2695b482a8SLen Brown */ 2795b482a8SLen Brown 2895b482a8SLen Brown void acpi_enable_wakeup_device_prep(u8 sleep_state) 2995b482a8SLen Brown { 3095b482a8SLen Brown struct list_head *node, *next; 3195b482a8SLen Brown 3295b482a8SLen Brown spin_lock(&acpi_device_lock); 3395b482a8SLen Brown list_for_each_safe(node, next, &acpi_wakeup_device_list) { 3495b482a8SLen Brown struct acpi_device *dev = container_of(node, 3595b482a8SLen Brown struct acpi_device, 3695b482a8SLen Brown wakeup_list); 3795b482a8SLen Brown 3895b482a8SLen Brown if (!dev->wakeup.flags.valid || 3995b482a8SLen Brown !dev->wakeup.state.enabled || 4095b482a8SLen Brown (sleep_state > (u32) dev->wakeup.sleep_state)) 4195b482a8SLen Brown continue; 4295b482a8SLen Brown 4395b482a8SLen Brown spin_unlock(&acpi_device_lock); 4495b482a8SLen Brown acpi_enable_wakeup_device_power(dev, sleep_state); 4595b482a8SLen Brown spin_lock(&acpi_device_lock); 4695b482a8SLen Brown } 4795b482a8SLen Brown spin_unlock(&acpi_device_lock); 4895b482a8SLen Brown } 4995b482a8SLen Brown 5095b482a8SLen Brown /** 5195b482a8SLen Brown * acpi_enable_wakeup_device - enable wakeup devices 5295b482a8SLen Brown * @sleep_state: ACPI state 5395b482a8SLen Brown * Enable all wakup devices's GPE 5495b482a8SLen Brown */ 5595b482a8SLen Brown void acpi_enable_wakeup_device(u8 sleep_state) 5695b482a8SLen Brown { 5795b482a8SLen Brown struct list_head *node, *next; 5895b482a8SLen Brown 5995b482a8SLen Brown /* 6095b482a8SLen Brown * Caution: this routine must be invoked when interrupt is disabled 6195b482a8SLen Brown * Refer ACPI2.0: P212 6295b482a8SLen Brown */ 6395b482a8SLen Brown spin_lock(&acpi_device_lock); 6495b482a8SLen Brown list_for_each_safe(node, next, &acpi_wakeup_device_list) { 6595b482a8SLen Brown struct acpi_device *dev = 6695b482a8SLen Brown container_of(node, struct acpi_device, wakeup_list); 6795b482a8SLen Brown 6895b482a8SLen Brown if (!dev->wakeup.flags.valid) 6995b482a8SLen Brown continue; 7095b482a8SLen Brown 7195b482a8SLen Brown /* If users want to disable run-wake GPE, 7295b482a8SLen Brown * we only disable it for wake and leave it for runtime 7395b482a8SLen Brown */ 7495b482a8SLen Brown if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared) 7595b482a8SLen Brown || sleep_state > (u32) dev->wakeup.sleep_state) { 7695b482a8SLen Brown if (dev->wakeup.flags.run_wake) { 7795b482a8SLen Brown spin_unlock(&acpi_device_lock); 7895b482a8SLen Brown /* set_gpe_type will disable GPE, leave it like that */ 7995b482a8SLen Brown acpi_set_gpe_type(dev->wakeup.gpe_device, 8095b482a8SLen Brown dev->wakeup.gpe_number, 8195b482a8SLen Brown ACPI_GPE_TYPE_RUNTIME); 8295b482a8SLen Brown spin_lock(&acpi_device_lock); 8395b482a8SLen Brown } 8495b482a8SLen Brown continue; 8595b482a8SLen Brown } 8695b482a8SLen Brown spin_unlock(&acpi_device_lock); 8795b482a8SLen Brown if (!dev->wakeup.flags.run_wake) 8895b482a8SLen Brown acpi_enable_gpe(dev->wakeup.gpe_device, 8995b482a8SLen Brown dev->wakeup.gpe_number); 9095b482a8SLen Brown spin_lock(&acpi_device_lock); 9195b482a8SLen Brown } 9295b482a8SLen Brown spin_unlock(&acpi_device_lock); 9395b482a8SLen Brown } 9495b482a8SLen Brown 9595b482a8SLen Brown /** 9695b482a8SLen Brown * acpi_disable_wakeup_device - disable devices' wakeup capability 9795b482a8SLen Brown * @sleep_state: ACPI state 9895b482a8SLen Brown * Disable all wakup devices's GPE and wakeup capability 9995b482a8SLen Brown */ 10095b482a8SLen Brown void acpi_disable_wakeup_device(u8 sleep_state) 10195b482a8SLen Brown { 10295b482a8SLen Brown struct list_head *node, *next; 10395b482a8SLen Brown 10495b482a8SLen Brown spin_lock(&acpi_device_lock); 10595b482a8SLen Brown list_for_each_safe(node, next, &acpi_wakeup_device_list) { 10695b482a8SLen Brown struct acpi_device *dev = 10795b482a8SLen Brown container_of(node, struct acpi_device, wakeup_list); 10895b482a8SLen Brown 10995b482a8SLen Brown if (!dev->wakeup.flags.valid) 11095b482a8SLen Brown continue; 11195b482a8SLen Brown 11295b482a8SLen Brown if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared) 11395b482a8SLen Brown || sleep_state > (u32) dev->wakeup.sleep_state) { 11495b482a8SLen Brown if (dev->wakeup.flags.run_wake) { 11595b482a8SLen Brown spin_unlock(&acpi_device_lock); 11695b482a8SLen Brown acpi_set_gpe_type(dev->wakeup.gpe_device, 11795b482a8SLen Brown dev->wakeup.gpe_number, 11895b482a8SLen Brown ACPI_GPE_TYPE_WAKE_RUN); 11995b482a8SLen Brown /* Re-enable it, since set_gpe_type will disable it */ 12095b482a8SLen Brown acpi_enable_gpe(dev->wakeup.gpe_device, 12195b482a8SLen Brown dev->wakeup.gpe_number); 12295b482a8SLen Brown spin_lock(&acpi_device_lock); 12395b482a8SLen Brown } 12495b482a8SLen Brown continue; 12595b482a8SLen Brown } 12695b482a8SLen Brown 12795b482a8SLen Brown spin_unlock(&acpi_device_lock); 12895b482a8SLen Brown acpi_disable_wakeup_device_power(dev); 12995b482a8SLen Brown /* Never disable run-wake GPE */ 13095b482a8SLen Brown if (!dev->wakeup.flags.run_wake) { 13195b482a8SLen Brown acpi_disable_gpe(dev->wakeup.gpe_device, 13295b482a8SLen Brown dev->wakeup.gpe_number); 13395b482a8SLen Brown acpi_clear_gpe(dev->wakeup.gpe_device, 13495b482a8SLen Brown dev->wakeup.gpe_number, ACPI_NOT_ISR); 13595b482a8SLen Brown } 13695b482a8SLen Brown spin_lock(&acpi_device_lock); 13795b482a8SLen Brown } 13895b482a8SLen Brown spin_unlock(&acpi_device_lock); 13995b482a8SLen Brown } 14095b482a8SLen Brown 141*201b8c65SBjorn Helgaas int __init acpi_wakeup_device_init(void) 14295b482a8SLen Brown { 14395b482a8SLen Brown struct list_head *node, *next; 14495b482a8SLen Brown 14595b482a8SLen Brown spin_lock(&acpi_device_lock); 14695b482a8SLen Brown list_for_each_safe(node, next, &acpi_wakeup_device_list) { 14795b482a8SLen Brown struct acpi_device *dev = container_of(node, 14895b482a8SLen Brown struct acpi_device, 14995b482a8SLen Brown wakeup_list); 15095b482a8SLen Brown /* In case user doesn't load button driver */ 15195b482a8SLen Brown if (!dev->wakeup.flags.run_wake || dev->wakeup.state.enabled) 15295b482a8SLen Brown continue; 15395b482a8SLen Brown spin_unlock(&acpi_device_lock); 15495b482a8SLen Brown acpi_set_gpe_type(dev->wakeup.gpe_device, 15595b482a8SLen Brown dev->wakeup.gpe_number, 15695b482a8SLen Brown ACPI_GPE_TYPE_WAKE_RUN); 15795b482a8SLen Brown acpi_enable_gpe(dev->wakeup.gpe_device, 15895b482a8SLen Brown dev->wakeup.gpe_number); 15995b482a8SLen Brown dev->wakeup.state.enabled = 1; 16095b482a8SLen Brown spin_lock(&acpi_device_lock); 16195b482a8SLen Brown } 16295b482a8SLen Brown spin_unlock(&acpi_device_lock); 16395b482a8SLen Brown return 0; 16495b482a8SLen Brown } 165