1*95b482a8SLen Brown /* 2*95b482a8SLen Brown * wakeup.c - support wakeup devices 3*95b482a8SLen Brown * Copyright (C) 2004 Li Shaohua <shaohua.li@intel.com> 4*95b482a8SLen Brown */ 5*95b482a8SLen Brown 6*95b482a8SLen Brown #include <linux/init.h> 7*95b482a8SLen Brown #include <linux/acpi.h> 8*95b482a8SLen Brown #include <acpi/acpi_drivers.h> 9*95b482a8SLen Brown #include <linux/kernel.h> 10*95b482a8SLen Brown #include <linux/types.h> 11*95b482a8SLen Brown #include "sleep.h" 12*95b482a8SLen Brown 13*95b482a8SLen Brown #define _COMPONENT ACPI_SYSTEM_COMPONENT 14*95b482a8SLen Brown ACPI_MODULE_NAME("wakeup_devices") 15*95b482a8SLen Brown 16*95b482a8SLen Brown extern struct list_head acpi_wakeup_device_list; 17*95b482a8SLen Brown extern spinlock_t acpi_device_lock; 18*95b482a8SLen Brown 19*95b482a8SLen Brown /** 20*95b482a8SLen Brown * acpi_enable_wakeup_device_prep - prepare wakeup devices 21*95b482a8SLen Brown * @sleep_state: ACPI state 22*95b482a8SLen Brown * Enable all wakup devices power if the devices' wakeup level 23*95b482a8SLen Brown * is higher than requested sleep level 24*95b482a8SLen Brown */ 25*95b482a8SLen Brown 26*95b482a8SLen Brown void acpi_enable_wakeup_device_prep(u8 sleep_state) 27*95b482a8SLen Brown { 28*95b482a8SLen Brown struct list_head *node, *next; 29*95b482a8SLen Brown 30*95b482a8SLen Brown spin_lock(&acpi_device_lock); 31*95b482a8SLen Brown list_for_each_safe(node, next, &acpi_wakeup_device_list) { 32*95b482a8SLen Brown struct acpi_device *dev = container_of(node, 33*95b482a8SLen Brown struct acpi_device, 34*95b482a8SLen Brown wakeup_list); 35*95b482a8SLen Brown 36*95b482a8SLen Brown if (!dev->wakeup.flags.valid || 37*95b482a8SLen Brown !dev->wakeup.state.enabled || 38*95b482a8SLen Brown (sleep_state > (u32) dev->wakeup.sleep_state)) 39*95b482a8SLen Brown continue; 40*95b482a8SLen Brown 41*95b482a8SLen Brown spin_unlock(&acpi_device_lock); 42*95b482a8SLen Brown acpi_enable_wakeup_device_power(dev, sleep_state); 43*95b482a8SLen Brown spin_lock(&acpi_device_lock); 44*95b482a8SLen Brown } 45*95b482a8SLen Brown spin_unlock(&acpi_device_lock); 46*95b482a8SLen Brown } 47*95b482a8SLen Brown 48*95b482a8SLen Brown /** 49*95b482a8SLen Brown * acpi_enable_wakeup_device - enable wakeup devices 50*95b482a8SLen Brown * @sleep_state: ACPI state 51*95b482a8SLen Brown * Enable all wakup devices's GPE 52*95b482a8SLen Brown */ 53*95b482a8SLen Brown void acpi_enable_wakeup_device(u8 sleep_state) 54*95b482a8SLen Brown { 55*95b482a8SLen Brown struct list_head *node, *next; 56*95b482a8SLen Brown 57*95b482a8SLen Brown /* 58*95b482a8SLen Brown * Caution: this routine must be invoked when interrupt is disabled 59*95b482a8SLen Brown * Refer ACPI2.0: P212 60*95b482a8SLen Brown */ 61*95b482a8SLen Brown spin_lock(&acpi_device_lock); 62*95b482a8SLen Brown list_for_each_safe(node, next, &acpi_wakeup_device_list) { 63*95b482a8SLen Brown struct acpi_device *dev = 64*95b482a8SLen Brown container_of(node, struct acpi_device, wakeup_list); 65*95b482a8SLen Brown 66*95b482a8SLen Brown if (!dev->wakeup.flags.valid) 67*95b482a8SLen Brown continue; 68*95b482a8SLen Brown 69*95b482a8SLen Brown /* If users want to disable run-wake GPE, 70*95b482a8SLen Brown * we only disable it for wake and leave it for runtime 71*95b482a8SLen Brown */ 72*95b482a8SLen Brown if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared) 73*95b482a8SLen Brown || sleep_state > (u32) dev->wakeup.sleep_state) { 74*95b482a8SLen Brown if (dev->wakeup.flags.run_wake) { 75*95b482a8SLen Brown spin_unlock(&acpi_device_lock); 76*95b482a8SLen Brown /* set_gpe_type will disable GPE, leave it like that */ 77*95b482a8SLen Brown acpi_set_gpe_type(dev->wakeup.gpe_device, 78*95b482a8SLen Brown dev->wakeup.gpe_number, 79*95b482a8SLen Brown ACPI_GPE_TYPE_RUNTIME); 80*95b482a8SLen Brown spin_lock(&acpi_device_lock); 81*95b482a8SLen Brown } 82*95b482a8SLen Brown continue; 83*95b482a8SLen Brown } 84*95b482a8SLen Brown spin_unlock(&acpi_device_lock); 85*95b482a8SLen Brown if (!dev->wakeup.flags.run_wake) 86*95b482a8SLen Brown acpi_enable_gpe(dev->wakeup.gpe_device, 87*95b482a8SLen Brown dev->wakeup.gpe_number); 88*95b482a8SLen Brown spin_lock(&acpi_device_lock); 89*95b482a8SLen Brown } 90*95b482a8SLen Brown spin_unlock(&acpi_device_lock); 91*95b482a8SLen Brown } 92*95b482a8SLen Brown 93*95b482a8SLen Brown /** 94*95b482a8SLen Brown * acpi_disable_wakeup_device - disable devices' wakeup capability 95*95b482a8SLen Brown * @sleep_state: ACPI state 96*95b482a8SLen Brown * Disable all wakup devices's GPE and wakeup capability 97*95b482a8SLen Brown */ 98*95b482a8SLen Brown void acpi_disable_wakeup_device(u8 sleep_state) 99*95b482a8SLen Brown { 100*95b482a8SLen Brown struct list_head *node, *next; 101*95b482a8SLen Brown 102*95b482a8SLen Brown spin_lock(&acpi_device_lock); 103*95b482a8SLen Brown list_for_each_safe(node, next, &acpi_wakeup_device_list) { 104*95b482a8SLen Brown struct acpi_device *dev = 105*95b482a8SLen Brown container_of(node, struct acpi_device, wakeup_list); 106*95b482a8SLen Brown 107*95b482a8SLen Brown if (!dev->wakeup.flags.valid) 108*95b482a8SLen Brown continue; 109*95b482a8SLen Brown 110*95b482a8SLen Brown if ((!dev->wakeup.state.enabled && !dev->wakeup.flags.prepared) 111*95b482a8SLen Brown || sleep_state > (u32) dev->wakeup.sleep_state) { 112*95b482a8SLen Brown if (dev->wakeup.flags.run_wake) { 113*95b482a8SLen Brown spin_unlock(&acpi_device_lock); 114*95b482a8SLen Brown acpi_set_gpe_type(dev->wakeup.gpe_device, 115*95b482a8SLen Brown dev->wakeup.gpe_number, 116*95b482a8SLen Brown ACPI_GPE_TYPE_WAKE_RUN); 117*95b482a8SLen Brown /* Re-enable it, since set_gpe_type will disable it */ 118*95b482a8SLen Brown acpi_enable_gpe(dev->wakeup.gpe_device, 119*95b482a8SLen Brown dev->wakeup.gpe_number); 120*95b482a8SLen Brown spin_lock(&acpi_device_lock); 121*95b482a8SLen Brown } 122*95b482a8SLen Brown continue; 123*95b482a8SLen Brown } 124*95b482a8SLen Brown 125*95b482a8SLen Brown spin_unlock(&acpi_device_lock); 126*95b482a8SLen Brown acpi_disable_wakeup_device_power(dev); 127*95b482a8SLen Brown /* Never disable run-wake GPE */ 128*95b482a8SLen Brown if (!dev->wakeup.flags.run_wake) { 129*95b482a8SLen Brown acpi_disable_gpe(dev->wakeup.gpe_device, 130*95b482a8SLen Brown dev->wakeup.gpe_number); 131*95b482a8SLen Brown acpi_clear_gpe(dev->wakeup.gpe_device, 132*95b482a8SLen Brown dev->wakeup.gpe_number, ACPI_NOT_ISR); 133*95b482a8SLen Brown } 134*95b482a8SLen Brown spin_lock(&acpi_device_lock); 135*95b482a8SLen Brown } 136*95b482a8SLen Brown spin_unlock(&acpi_device_lock); 137*95b482a8SLen Brown } 138*95b482a8SLen Brown 139*95b482a8SLen Brown static int __init acpi_wakeup_device_init(void) 140*95b482a8SLen Brown { 141*95b482a8SLen Brown struct list_head *node, *next; 142*95b482a8SLen Brown 143*95b482a8SLen Brown if (acpi_disabled) 144*95b482a8SLen Brown return 0; 145*95b482a8SLen Brown 146*95b482a8SLen Brown spin_lock(&acpi_device_lock); 147*95b482a8SLen Brown list_for_each_safe(node, next, &acpi_wakeup_device_list) { 148*95b482a8SLen Brown struct acpi_device *dev = container_of(node, 149*95b482a8SLen Brown struct acpi_device, 150*95b482a8SLen Brown wakeup_list); 151*95b482a8SLen Brown /* In case user doesn't load button driver */ 152*95b482a8SLen Brown if (!dev->wakeup.flags.run_wake || dev->wakeup.state.enabled) 153*95b482a8SLen Brown continue; 154*95b482a8SLen Brown spin_unlock(&acpi_device_lock); 155*95b482a8SLen Brown acpi_set_gpe_type(dev->wakeup.gpe_device, 156*95b482a8SLen Brown dev->wakeup.gpe_number, 157*95b482a8SLen Brown ACPI_GPE_TYPE_WAKE_RUN); 158*95b482a8SLen Brown acpi_enable_gpe(dev->wakeup.gpe_device, 159*95b482a8SLen Brown dev->wakeup.gpe_number); 160*95b482a8SLen Brown dev->wakeup.state.enabled = 1; 161*95b482a8SLen Brown spin_lock(&acpi_device_lock); 162*95b482a8SLen Brown } 163*95b482a8SLen Brown spin_unlock(&acpi_device_lock); 164*95b482a8SLen Brown return 0; 165*95b482a8SLen Brown } 166*95b482a8SLen Brown 167*95b482a8SLen Brown late_initcall(acpi_wakeup_device_init); 168