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* acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
* Copyright (C) 2001, 2002 Andy Grover <>
* Copyright (C) 2001, 2002 Paul Diefenbaugh <>
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* General Public License for more details.
* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#ifndef __ACPI_BUS_H__
#define __ACPI_BUS_H__
#include <linux/device.h>
#include <linux/property.h>
/* TBD: Make dynamic */
struct acpi_handle_list {
u32 count;
acpi_handle handles[ACPI_MAX_HANDLES];
/* acpi_utils.h */
acpi_extract_package(union acpi_object *package,
struct acpi_buffer *format, struct acpi_buffer *buffer);
acpi_evaluate_integer(acpi_handle handle,
acpi_string pathname,
struct acpi_object_list *arguments, unsigned long long *data);
acpi_evaluate_reference(acpi_handle handle,
acpi_string pathname,
struct acpi_object_list *arguments,
struct acpi_handle_list *list);
acpi_evaluate_ost(acpi_handle handle, u32 source_event, u32 status_code,
struct acpi_buffer *status_buf);
acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
bool acpi_has_method(acpi_handle handle, char *name);
acpi_status acpi_execute_simple_method(acpi_handle handle, char *method,
u64 arg);
acpi_status acpi_evaluate_ej0(acpi_handle handle);
acpi_status acpi_evaluate_lck(acpi_handle handle, int lock);
bool acpi_ata_match(acpi_handle handle);
bool acpi_bay_match(acpi_handle handle);
bool acpi_dock_match(acpi_handle handle);
bool acpi_check_dsm(acpi_handle handle, const guid_t *guid, u64 rev, u64 funcs);
union acpi_object *acpi_evaluate_dsm(acpi_handle handle, const guid_t *guid,
u64 rev, u64 func, union acpi_object *argv4);
static inline union acpi_object *
acpi_evaluate_dsm_typed(acpi_handle handle, const guid_t *guid, u64 rev,
u64 func, union acpi_object *argv4,
acpi_object_type type)
union acpi_object *obj;
obj = acpi_evaluate_dsm(handle, guid, rev, func, argv4);
if (obj && obj->type != type) {
obj = NULL;
return obj;
#define ACPI_INIT_DSM_ARGV4(cnt, eles) \
{ \
.package.type = ACPI_TYPE_PACKAGE, \
.package.count = (cnt), \
.package.elements = (eles) \
bool acpi_dev_found(const char *hid);
bool acpi_dev_present(const char *hid, const char *uid, s64 hrv);
const char *
acpi_dev_get_first_match_name(const char *hid, const char *uid, s64 hrv);
#include <linux/proc_fs.h>
#define ACPI_BUS_FILE_ROOT "acpi"
extern struct proc_dir_entry *acpi_root_dir;
enum acpi_bus_device_type {
struct acpi_driver;
struct acpi_device;
* ACPI Scan Handler
* -----------------
struct acpi_hotplug_profile {
struct kobject kobj;
int (*scan_dependent)(struct acpi_device *adev);
void (*notify_online)(struct acpi_device *adev);
bool enabled:1;
bool demand_offline:1;
static inline struct acpi_hotplug_profile *to_acpi_hotplug_profile(
struct kobject *kobj)
return container_of(kobj, struct acpi_hotplug_profile, kobj);
struct acpi_scan_handler {
const struct acpi_device_id *ids;
struct list_head list_node;
bool (*match)(const char *idstr, const struct acpi_device_id **matchid);
int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
void (*detach)(struct acpi_device *dev);
void (*bind)(struct device *phys_dev);
void (*unbind)(struct device *phys_dev);
struct acpi_hotplug_profile hotplug;
* ACPI Hotplug Context
* --------------------
struct acpi_hotplug_context {
struct acpi_device *self;
int (*notify)(struct acpi_device *, u32);
void (*uevent)(struct acpi_device *, u32);
void (*fixup)(struct acpi_device *);
* ACPI Driver
* -----------
typedef int (*acpi_op_add) (struct acpi_device * device);
typedef int (*acpi_op_remove) (struct acpi_device * device);
typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);
struct acpi_device_ops {
acpi_op_add add;
acpi_op_remove remove;
acpi_op_notify notify;
#define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */
struct acpi_driver {
char name[80];
char class[80];
const struct acpi_device_id *ids; /* Supported Hardware IDs */
unsigned int flags;
struct acpi_device_ops ops;
struct device_driver drv;
struct module *owner;
* ACPI Device
* -----------
/* Status (_STA) */
struct acpi_device_status {
u32 present:1;
u32 enabled:1;
u32 show_in_ui:1;
u32 functional:1;
u32 battery_present:1;
u32 reserved:27;
/* Flags */
struct acpi_device_flags {
u32 dynamic_status:1;
u32 removable:1;
u32 ejectable:1;
u32 power_manageable:1;
u32 match_driver:1;
u32 initialized:1;
u32 visited:1;
u32 hotplug_notify:1;
u32 is_dock_station:1;
u32 of_compatible_ok:1;
u32 coherent_dma:1;
u32 cca_seen:1;
u32 enumeration_by_parent:1;
u32 reserved:19;
/* File System */
struct acpi_device_dir {
struct proc_dir_entry *entry;
#define acpi_device_dir(d) ((d)->dir.entry)
/* Plug and Play */
typedef char acpi_bus_id[8];
typedef unsigned long acpi_bus_address;
typedef char acpi_device_name[40];
typedef char acpi_device_class[20];
struct acpi_hardware_id {
struct list_head list;
const char *id;
struct acpi_pnp_type {
u32 hardware_id:1;
u32 bus_address:1;
u32 platform_id:1;
u32 reserved:29;
struct acpi_device_pnp {
acpi_bus_id bus_id; /* Object name */
struct acpi_pnp_type type; /* ID type */
acpi_bus_address bus_address; /* _ADR */
char *unique_id; /* _UID */
struct list_head ids; /* _HID and _CIDs */
acpi_device_name device_name; /* Driver-determined */
acpi_device_class device_class; /* " */
union acpi_object *str_obj; /* unicode string for _STR method */
#define acpi_device_bid(d) ((d)->pnp.bus_id)
#define acpi_device_adr(d) ((d)->pnp.bus_address)
const char *acpi_device_hid(struct acpi_device *device);
#define acpi_device_uid(d) ((d)->pnp.unique_id)
#define acpi_device_name(d) ((d)->pnp.device_name)
#define acpi_device_class(d) ((d)->pnp.device_class)
/* Power Management */
struct acpi_device_power_flags {
u32 explicit_get:1; /* _PSC present? */
u32 power_resources:1; /* Power resources */
u32 inrush_current:1; /* Serialize Dx->D0 */
u32 power_removed:1; /* Optimize Dx->D0 */
u32 ignore_parent:1; /* Power is independent of parent power state */
u32 dsw_present:1; /* _DSW present? */
u32 reserved:26;
struct acpi_device_power_state {
struct {
u8 valid:1;
u8 explicit_set:1; /* _PSx present? */
u8 reserved:6;
} flags;
int power; /* % Power (compared to D0) */
int latency; /* Dx->D0 time (microseconds) */
struct list_head resources; /* Power resources referenced */
struct acpi_device_power {
int state; /* Current state */
struct acpi_device_power_flags flags;
struct acpi_device_power_state states[ACPI_D_STATE_COUNT]; /* Power states (D0-D3Cold) */
/* Performance Management */
struct acpi_device_perf_flags {
u8 reserved:8;
struct acpi_device_perf_state {
struct {
u8 valid:1;
u8 reserved:7;
} flags;
u8 power; /* % Power (compared to P0) */
u8 performance; /* % Performance ( " ) */
int latency; /* Px->P0 time (microseconds) */
struct acpi_device_perf {
int state;
struct acpi_device_perf_flags flags;
int state_count;
struct acpi_device_perf_state *states;
/* Wakeup Management */
struct acpi_device_wakeup_flags {
u8 valid:1; /* Can successfully enable wakeup? */
u8 notifier_present:1; /* Wake-up notify handler has been installed */
struct acpi_device_wakeup_context {
void (*func)(struct acpi_device_wakeup_context *context);
struct device *dev;
struct acpi_device_wakeup {
acpi_handle gpe_device;
u64 gpe_number;
u64 sleep_state;
struct list_head resources;
struct acpi_device_wakeup_flags flags;
struct acpi_device_wakeup_context context;
struct wakeup_source *ws;
int prepare_count;
int enable_count;
struct acpi_device_physical_node {
unsigned int node_id;
struct list_head node;
struct device *dev;
bool put_online:1;
/* ACPI Device Specific Data (_DSD) */
struct acpi_device_data {
const union acpi_object *pointer;
const union acpi_object *properties;
const union acpi_object *of_compatible;
struct list_head subnodes;
struct acpi_gpio_mapping;
/* Device */
struct acpi_device {
int device_type;
acpi_handle handle; /* no handle for fixed hardware */
struct fwnode_handle fwnode;
struct acpi_device *parent;
struct list_head children;
struct list_head node;
struct list_head wakeup_list;
struct list_head del_list;
struct acpi_device_status status;
struct acpi_device_flags flags;
struct acpi_device_pnp pnp;
struct acpi_device_power power;
struct acpi_device_wakeup wakeup;
struct acpi_device_perf performance;
struct acpi_device_dir dir;
struct acpi_device_data data;
struct acpi_scan_handler *handler;
struct acpi_hotplug_context *hp;
struct acpi_driver *driver;
const struct acpi_gpio_mapping *driver_gpios;
void *driver_data;
struct device dev;
unsigned int physical_node_count;
unsigned int dep_unmet;
struct list_head physical_node_list;
struct mutex physical_node_lock;
void (*remove)(struct acpi_device *);
/* Non-device subnode */
struct acpi_data_node {
const char *name;
acpi_handle handle;
struct fwnode_handle fwnode;
struct fwnode_handle *parent;
struct acpi_device_data data;
struct list_head sibling;
struct kobject kobj;
struct completion kobj_done;
extern const struct fwnode_operations acpi_device_fwnode_ops;
extern const struct fwnode_operations acpi_data_fwnode_ops;
extern const struct fwnode_operations acpi_static_fwnode_ops;
bool is_acpi_device_node(const struct fwnode_handle *fwnode);
bool is_acpi_data_node(const struct fwnode_handle *fwnode);
static inline bool is_acpi_node(const struct fwnode_handle *fwnode)
return (is_acpi_device_node(fwnode) || is_acpi_data_node(fwnode));
#define to_acpi_device_node(__fwnode) \
({ \
typeof(__fwnode) __to_acpi_device_node_fwnode = __fwnode; \
is_acpi_device_node(__to_acpi_device_node_fwnode) ? \
container_of(__to_acpi_device_node_fwnode, \
struct acpi_device, fwnode) : \
#define to_acpi_data_node(__fwnode) \
({ \
typeof(__fwnode) __to_acpi_data_node_fwnode = __fwnode; \
is_acpi_data_node(__to_acpi_data_node_fwnode) ? \
container_of(__to_acpi_data_node_fwnode, \
struct acpi_data_node, fwnode) : \
static inline bool is_acpi_static_node(const struct fwnode_handle *fwnode)
return !IS_ERR_OR_NULL(fwnode) &&
fwnode->ops == &acpi_static_fwnode_ops;
static inline bool acpi_data_node_match(const struct fwnode_handle *fwnode,
const char *name)
return is_acpi_data_node(fwnode) ?
(!strcmp(to_acpi_data_node(fwnode)->name, name)) : false;
static inline struct fwnode_handle *acpi_fwnode_handle(struct acpi_device *adev)
return &adev->fwnode;
static inline void *acpi_driver_data(struct acpi_device *d)
return d->driver_data;
#define to_acpi_device(d) container_of(d, struct acpi_device, dev)
#define to_acpi_driver(d) container_of(d, struct acpi_driver, drv)
static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
*((u32 *)&adev->status) = sta;
static inline void acpi_set_hp_context(struct acpi_device *adev,
struct acpi_hotplug_context *hp)
hp->self = adev;
adev->hp = hp;
void acpi_initialize_hp_context(struct acpi_device *adev,
struct acpi_hotplug_context *hp,
int (*notify)(struct acpi_device *, u32),
void (*uevent)(struct acpi_device *, u32));
/* == &acpi_bus_type */
extern struct bus_type acpi_bus_type;
* Events
* ------
struct acpi_bus_event {
struct list_head node;
acpi_device_class device_class;
acpi_bus_id bus_id;
u32 type;
u32 data;
extern struct kobject *acpi_kobj;
extern int acpi_bus_generate_netlink_event(const char*, const char*, u8, int);
void acpi_bus_private_data_handler(acpi_handle, void *);
int acpi_bus_get_private_data(acpi_handle, void **);
int acpi_bus_attach_private_data(acpi_handle, void *);
void acpi_bus_detach_private_data(acpi_handle);
extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
extern int register_acpi_notifier(struct notifier_block *);
extern int unregister_acpi_notifier(struct notifier_block *);
* External Functions
int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
void acpi_bus_put_acpi_device(struct acpi_device *adev);
acpi_status acpi_bus_get_status_handle(acpi_handle handle,
unsigned long long *sta);
int acpi_bus_get_status(struct acpi_device *device);
int acpi_bus_set_power(acpi_handle handle, int state);
const char *acpi_power_state_string(int state);
int acpi_device_get_power(struct acpi_device *device, int *state);
int acpi_device_set_power(struct acpi_device *device, int state);
int acpi_bus_init_power(struct acpi_device *device);
int acpi_device_fix_up_power(struct acpi_device *device);
int acpi_bus_update_power(acpi_handle handle, int *state_p);
int acpi_device_update_power(struct acpi_device *device, int *state_p);
bool acpi_bus_power_manageable(acpi_handle handle);
#ifdef CONFIG_PM
bool acpi_bus_can_wakeup(acpi_handle handle);
static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
void acpi_scan_lock_acquire(void);
void acpi_scan_lock_release(void);
void acpi_lock_hp_context(void);
void acpi_unlock_hp_context(void);
int acpi_scan_add_handler(struct acpi_scan_handler *handler);
int acpi_bus_register_driver(struct acpi_driver *driver);
void acpi_bus_unregister_driver(struct acpi_driver *driver);
int acpi_bus_scan(acpi_handle handle);
void acpi_bus_trim(struct acpi_device *start);
acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
int acpi_match_device_ids(struct acpi_device *device,
const struct acpi_device_id *ids);
void acpi_set_modalias(struct acpi_device *adev, const char *default_id,
char *modalias, size_t len);
int acpi_create_dir(struct acpi_device *);
void acpi_remove_dir(struct acpi_device *);
static inline bool acpi_device_enumerated(struct acpi_device *adev)
return adev && adev->flags.initialized && adev->flags.visited;
* module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
* @__acpi_driver: acpi_driver struct
* Helper macro for ACPI drivers which do not do anything special in module
* init/exit. This eliminates a lot of boilerplate. Each module may only
* use this macro once, and calling it replaces module_init() and module_exit()
#define module_acpi_driver(__acpi_driver) \
module_driver(__acpi_driver, acpi_bus_register_driver, \
* Bind physical devices with ACPI devices
struct acpi_bus_type {
struct list_head list;
const char *name;
bool (*match)(struct device *dev);
struct acpi_device * (*find_companion)(struct device *);
void (*setup)(struct device *);
void (*cleanup)(struct device *);
int register_acpi_bus_type(struct acpi_bus_type *);
int unregister_acpi_bus_type(struct acpi_bus_type *);
int acpi_bind_one(struct device *dev, struct acpi_device *adev);
int acpi_unbind_one(struct device *dev);
struct acpi_pci_root {
struct acpi_device * device;
struct pci_bus *bus;
u16 segment;
struct resource secondary; /* downstream bus range */
u32 osc_support_set; /* _OSC state of support bits */
u32 osc_control_set; /* _OSC state of control bits */
phys_addr_t mcfg_addr;
/* helper */
bool acpi_dma_supported(struct acpi_device *adev);
enum dev_dma_attr acpi_get_dma_attr(struct acpi_device *adev);
int acpi_dma_get_range(struct device *dev, u64 *dma_addr, u64 *offset,
u64 *size);
int acpi_dma_configure(struct device *dev, enum dev_dma_attr attr);
void acpi_dma_deconfigure(struct device *dev);
struct acpi_device *acpi_find_child_device(struct acpi_device *parent,
u64 address, bool check_children);
int acpi_is_root_bridge(acpi_handle);
struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
int acpi_disable_wakeup_device_power(struct acpi_device *dev);
#ifdef CONFIG_X86
bool acpi_device_always_present(struct acpi_device *adev);
static inline bool acpi_device_always_present(struct acpi_device *adev)
return false;
#ifdef CONFIG_PM
void acpi_pm_wakeup_event(struct device *dev);
acpi_status acpi_add_pm_notifier(struct acpi_device *adev, struct device *dev,
void (*func)(struct acpi_device_wakeup_context *context));
acpi_status acpi_remove_pm_notifier(struct acpi_device *adev);
bool acpi_pm_device_can_wakeup(struct device *dev);
int acpi_pm_device_sleep_state(struct device *, int *, int);
int acpi_pm_set_device_wakeup(struct device *dev, bool enable);
int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable);
static inline void acpi_pm_wakeup_event(struct device *dev)
static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
struct device *dev,
void (*func)(struct acpi_device_wakeup_context *context))
return AE_SUPPORT;
static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev)
return AE_SUPPORT;
static inline bool acpi_pm_device_can_wakeup(struct device *dev)
return false;
static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
if (p)
return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3_COLD) ?
static inline int acpi_pm_set_device_wakeup(struct device *dev, bool enable)
return -ENODEV;
static inline int acpi_pm_set_bridge_wakeup(struct device *dev, bool enable)
return -ENODEV;
u32 acpi_target_system_state(void);
static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
static inline bool acpi_device_power_manageable(struct acpi_device *adev)
return adev->flags.power_manageable;
static inline bool acpi_device_can_wakeup(struct acpi_device *adev)
return adev->wakeup.flags.valid;
static inline bool acpi_device_can_poweroff(struct acpi_device *adev)
return adev->power.states[ACPI_STATE_D3_COLD].flags.valid ||
((acpi_gbl_FADT.header.revision < 6) &&
#else /* CONFIG_ACPI */
static inline int register_acpi_bus_type(void *bus) { return 0; }
static inline int unregister_acpi_bus_type(void *bus) { return 0; }
#endif /* CONFIG_ACPI */
#endif /*__ACPI_BUS_H__*/