[mirror_ubuntu-artful-kernel.git] / include / acpi / acpi_bus.h

/*
 *  acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
 *
 *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
 *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *  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
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 */

#ifndef __ACPI_BUS_H__
#define __ACPI_BUS_H__

#include <linux/device.h>

#include <acpi/acpi.h>

/* TBD: Make dynamic */
#define ACPI_MAX_HANDLES	10
struct acpi_handle_list {
	u32 count;
	acpi_handle handles[ACPI_MAX_HANDLES];
};

/* acpi_utils.h */
acpi_status
acpi_extract_package(union acpi_object *package,
		     struct acpi_buffer *format, struct acpi_buffer *buffer);
acpi_status
acpi_evaluate_integer(acpi_handle handle,
		      acpi_string pathname,
		      struct acpi_object_list *arguments, unsigned long long *data);
acpi_status
acpi_evaluate_reference(acpi_handle handle,
			acpi_string pathname,
			struct acpi_object_list *arguments,
			struct acpi_handle_list *list);

#ifdef CONFIG_ACPI

#include <linux/proc_fs.h>

#define ACPI_BUS_FILE_ROOT	"acpi"
extern struct proc_dir_entry *acpi_root_dir;

enum acpi_bus_removal_type {
	ACPI_BUS_REMOVAL_NORMAL = 0,
	ACPI_BUS_REMOVAL_EJECT,
	ACPI_BUS_REMOVAL_SUPRISE,
	ACPI_BUS_REMOVAL_TYPE_COUNT
};

enum acpi_bus_device_type {
	ACPI_BUS_TYPE_DEVICE = 0,
	ACPI_BUS_TYPE_POWER,
	ACPI_BUS_TYPE_PROCESSOR,
	ACPI_BUS_TYPE_THERMAL,
	ACPI_BUS_TYPE_POWER_BUTTON,
	ACPI_BUS_TYPE_SLEEP_BUTTON,
	ACPI_BUS_DEVICE_TYPE_COUNT
};

struct acpi_driver;
struct acpi_device;

/*
 * ACPI Driver
 * -----------
 */

typedef int (*acpi_op_add) (struct acpi_device * device);
typedef int (*acpi_op_remove) (struct acpi_device * device, int type);
typedef int (*acpi_op_start) (struct acpi_device * device);
typedef int (*acpi_op_suspend) (struct acpi_device * device,
				pm_message_t state);
typedef int (*acpi_op_resume) (struct acpi_device * device);
typedef int (*acpi_op_bind) (struct acpi_device * device);
typedef int (*acpi_op_unbind) (struct acpi_device * device);
typedef void (*acpi_op_notify) (struct acpi_device * device, u32 event);

struct acpi_bus_ops {
	u32 acpi_op_add:1;
	u32 acpi_op_start:1;
};

struct acpi_device_ops {
	acpi_op_add add;
	acpi_op_remove remove;
	acpi_op_start start;
	acpi_op_suspend suspend;
	acpi_op_resume resume;
	acpi_op_bind bind;
	acpi_op_unbind unbind;
	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 hardware_id:1;
	u32 compatible_ids:1;
	u32 bus_address:1;
	u32 unique_id:1;
	u32 removable:1;
	u32 ejectable:1;
	u32 lockable:1;
	u32 suprise_removal_ok:1;
	u32 power_manageable:1;
	u32 performance_manageable:1;
	u32 wake_capable:1;	/* Wakeup(_PRW) supported? */
	u32 force_power_state: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_device_pnp {
	acpi_bus_id bus_id;	/* Object name */
	acpi_bus_address bus_address;	/* _ADR */
	char *hardware_id;	/* _HID */
	struct acpica_device_id_list *cid_list;	/* _CIDs */
	char *unique_id;	/* _UID */
	acpi_device_name device_name;	/* Driver-determined */
	acpi_device_class device_class;	/*        "          */
};

#define acpi_device_bid(d)	((d)->pnp.bus_id)
#define acpi_device_adr(d)	((d)->pnp.bus_address)
#define acpi_device_hid(d)	((d)->pnp.hardware_id)
#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 reserved:28;
};

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 acpi_handle_list resources;	/* Power resources referenced */
};

struct acpi_device_power {
	int state;		/* Current state */
	struct acpi_device_power_flags flags;
	struct acpi_device_power_state states[4];	/* Power states (D0-D3) */
};

/* 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 run_wake:1;		/* Run-Wake GPE devices */
};

struct acpi_device_wakeup_state {
	u8 enabled:1;
};

struct acpi_device_wakeup {
	acpi_handle gpe_device;
	acpi_integer gpe_number;
	acpi_integer sleep_state;
	struct acpi_handle_list resources;
	struct acpi_device_wakeup_state state;
	struct acpi_device_wakeup_flags flags;
	int prepare_count;
};

/* Device */

struct acpi_device {
	int device_type;
	acpi_handle handle;		/* no handle for fixed hardware */
	struct acpi_device *parent;
	struct list_head children;
	struct list_head node;
	struct list_head wakeup_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_ops ops;
	struct acpi_driver *driver;
	void *driver_data;
	struct device dev;
	struct acpi_bus_ops bus_ops;	/* workaround for different code path for hotplug */
	enum acpi_bus_removal_type removal_type;	/* indicate for different removal type */
};

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)

/* acpi_device.dev.bus == &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 **);
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 *);

extern int register_acpi_bus_notifier(struct notifier_block *nb);
extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
/*
 * External Functions
 */

int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
void acpi_bus_data_handler(acpi_handle handle, void *context);
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_get_power(acpi_handle handle, int *state);
int acpi_bus_set_power(acpi_handle handle, int state);
bool acpi_bus_power_manageable(acpi_handle handle);
bool acpi_bus_can_wakeup(acpi_handle handle);
#ifdef CONFIG_ACPI_PROC_EVENT
int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
int acpi_bus_generate_proc_event4(const char *class, const char *bid, u8 type, int data);
int acpi_bus_receive_event(struct acpi_bus_event *event);
#else
static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
	{ return 0; }
#endif
int acpi_bus_register_driver(struct acpi_driver *driver);
void acpi_bus_unregister_driver(struct acpi_driver *driver);
int acpi_bus_add(struct acpi_device **child, struct acpi_device *parent,
		 acpi_handle handle, int type);
int acpi_bus_trim(struct acpi_device *start, int rmdevice);
int acpi_bus_start(struct acpi_device *device);
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);
int acpi_create_dir(struct acpi_device *);
void acpi_remove_dir(struct acpi_device *);

/*
 * Bind physical devices with ACPI devices
 */
struct acpi_bus_type {
	struct list_head list;
	struct bus_type *bus;
	/* For general devices under the bus */
	int (*find_device) (struct device *, acpi_handle *);
	/* For bridges, such as PCI root bridge, IDE controller */
	int (*find_bridge) (struct device *, acpi_handle *);
};
int register_acpi_bus_type(struct acpi_bus_type *);
int unregister_acpi_bus_type(struct acpi_bus_type *);
struct device *acpi_get_physical_device(acpi_handle);

struct acpi_pci_root {
	struct list_head node;
	struct acpi_device * device;
	struct acpi_pci_id id;
	struct pci_bus *bus;
	u16 segment;
	u8 bus_nr;

	u32 osc_support_set;	/* _OSC state of support bits */
	u32 osc_control_set;	/* _OSC state of control bits */
	u32 osc_control_qry;	/* the latest _OSC query result */

	u32 osc_queried:1;	/* has _OSC control been queried? */
};

/* helper */
acpi_handle acpi_get_child(acpi_handle, acpi_integer);
int acpi_is_root_bridge(acpi_handle);
acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))

#ifdef CONFIG_PM_SLEEP
int acpi_pm_device_sleep_state(struct device *, int *);
int acpi_pm_device_sleep_wake(struct device *, bool);
#else /* !CONFIG_PM_SLEEP */
static inline int acpi_pm_device_sleep_state(struct device *d, int *p)
{
	if (p)
		*p = ACPI_STATE_D0;
	return ACPI_STATE_D3;
}
static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
{
	return -ENODEV;
}
#endif /* !CONFIG_PM_SLEEP */

#endif				/* CONFIG_ACPI */

#endif /*__ACPI_BUS_H__*/
Commit	Line	Data
	1	/*
	2	* acpi_bus.h - ACPI Bus Driver ($Revision: 22 $)
	3	*
	4	* Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
	5	* Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
	6	*
	7	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	8	*
	9	* This program is free software; you can redistribute it and/or modify
	10	* it under the terms of the GNU General Public License as published by
	11	* the Free Software Foundation; either version 2 of the License, or (at
	12	* your option) any later version.
	13	*
	14	* This program is distributed in the hope that it will be useful, but
	15	* WITHOUT ANY WARRANTY; without even the implied warranty of
	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU General Public License along
	20	* with this program; if not, write to the Free Software Foundation, Inc.,
	21	* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
	22	*
	23	* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
	24	*/
	25
	26	#ifndef __ACPI_BUS_H__
	27	#define __ACPI_BUS_H__
	28
	29	#include <linux/device.h>
	30
	31	#include <acpi/acpi.h>
	32
	33	/* TBD: Make dynamic */
	34	#define ACPI_MAX_HANDLES 10
	35	struct acpi_handle_list {
	36	u32 count;
	37	acpi_handle handles[ACPI_MAX_HANDLES];
	38	};
	39
	40	/* acpi_utils.h */
	41	acpi_status
	42	acpi_extract_package(union acpi_object *package,
	43	struct acpi_buffer format, struct acpi_buffer buffer);
	44	acpi_status
	45	acpi_evaluate_integer(acpi_handle handle,
	46	acpi_string pathname,
	47	struct acpi_object_list arguments, unsigned long long data);
	48	acpi_status
	49	acpi_evaluate_reference(acpi_handle handle,
	50	acpi_string pathname,
	51	struct acpi_object_list *arguments,
	52	struct acpi_handle_list *list);
	53
	54	#ifdef CONFIG_ACPI
	55
	56	#include <linux/proc_fs.h>
	57
	58	#define ACPI_BUS_FILE_ROOT "acpi"
	59	extern struct proc_dir_entry *acpi_root_dir;
	60
	61	enum acpi_bus_removal_type {
	62	ACPI_BUS_REMOVAL_NORMAL = 0,
	63	ACPI_BUS_REMOVAL_EJECT,
	64	ACPI_BUS_REMOVAL_SUPRISE,
	65	ACPI_BUS_REMOVAL_TYPE_COUNT
	66	};
	67
	68	enum acpi_bus_device_type {
	69	ACPI_BUS_TYPE_DEVICE = 0,
	70	ACPI_BUS_TYPE_POWER,
	71	ACPI_BUS_TYPE_PROCESSOR,
	72	ACPI_BUS_TYPE_THERMAL,
	73	ACPI_BUS_TYPE_POWER_BUTTON,
	74	ACPI_BUS_TYPE_SLEEP_BUTTON,
	75	ACPI_BUS_DEVICE_TYPE_COUNT
	76	};
	77
	78	struct acpi_driver;
	79	struct acpi_device;
	80
	81	/*
	82	* ACPI Driver
	83	* -----------
	84	*/
	85
	86	typedef int (acpi_op_add) (struct acpi_device device);
	87	typedef int (acpi_op_remove) (struct acpi_device device, int type);
	88	typedef int (acpi_op_start) (struct acpi_device device);
	89	typedef int (acpi_op_suspend) (struct acpi_device device,
	90	pm_message_t state);
	91	typedef int (acpi_op_resume) (struct acpi_device device);
	92	typedef int (acpi_op_bind) (struct acpi_device device);
	93	typedef int (acpi_op_unbind) (struct acpi_device device);
	94	typedef void (acpi_op_notify) (struct acpi_device device, u32 event);
	95
	96	struct acpi_bus_ops {
	97	u32 acpi_op_add:1;
	98	u32 acpi_op_start:1;
	99	};
	100
	101	struct acpi_device_ops {
	102	acpi_op_add add;
	103	acpi_op_remove remove;
	104	acpi_op_start start;
	105	acpi_op_suspend suspend;
	106	acpi_op_resume resume;
	107	acpi_op_bind bind;
	108	acpi_op_unbind unbind;
	109	acpi_op_notify notify;
	110	};
	111
	112	#define ACPI_DRIVER_ALL_NOTIFY_EVENTS 0x1 /* system AND device events */
	113
	114	struct acpi_driver {
	115	char name[80];
	116	char class[80];
	117	const struct acpi_device_id ids; / Supported Hardware IDs */
	118	unsigned int flags;
	119	struct acpi_device_ops ops;
	120	struct device_driver drv;
	121	struct module *owner;
	122	};
	123
	124	/*
	125	* ACPI Device
	126	* -----------
	127	*/
	128
	129	/* Status (_STA) */
	130
	131	struct acpi_device_status {
	132	u32 present:1;
	133	u32 enabled:1;
	134	u32 show_in_ui:1;
	135	u32 functional:1;
	136	u32 battery_present:1;
	137	u32 reserved:27;
	138	};
	139
	140	/* Flags */
	141
	142	struct acpi_device_flags {
	143	u32 dynamic_status:1;
	144	u32 hardware_id:1;
	145	u32 compatible_ids:1;
	146	u32 bus_address:1;
	147	u32 unique_id:1;
	148	u32 removable:1;
	149	u32 ejectable:1;
	150	u32 lockable:1;
	151	u32 suprise_removal_ok:1;
	152	u32 power_manageable:1;
	153	u32 performance_manageable:1;
	154	u32 wake_capable:1; /* Wakeup(_PRW) supported? */
	155	u32 force_power_state:1;
	156	u32 reserved:19;
	157	};
	158
	159	/* File System */
	160
	161	struct acpi_device_dir {
	162	struct proc_dir_entry *entry;
	163	};
	164
	165	#define acpi_device_dir(d) ((d)->dir.entry)
	166
	167	/* Plug and Play */
	168
	169	typedef char acpi_bus_id[8];
	170	typedef unsigned long acpi_bus_address;
	171	typedef char acpi_device_name[40];
	172	typedef char acpi_device_class[20];
	173
	174	struct acpi_device_pnp {
	175	acpi_bus_id bus_id; /* Object name */
	176	acpi_bus_address bus_address; /* _ADR */
	177	char hardware_id; / _HID */
	178	struct acpica_device_id_list cid_list; / _CIDs */
	179	char unique_id; / _UID */
	180	acpi_device_name device_name; /* Driver-determined */
	181	acpi_device_class device_class; /* " */
	182	};
	183
	184	#define acpi_device_bid(d) ((d)->pnp.bus_id)
	185	#define acpi_device_adr(d) ((d)->pnp.bus_address)
	186	#define acpi_device_hid(d) ((d)->pnp.hardware_id)
	187	#define acpi_device_uid(d) ((d)->pnp.unique_id)
	188	#define acpi_device_name(d) ((d)->pnp.device_name)
	189	#define acpi_device_class(d) ((d)->pnp.device_class)
	190
	191	/* Power Management */
	192
	193	struct acpi_device_power_flags {
	194	u32 explicit_get:1; /* _PSC present? */
	195	u32 power_resources:1; /* Power resources */
	196	u32 inrush_current:1; /* Serialize Dx->D0 */
	197	u32 power_removed:1; /* Optimize Dx->D0 */
	198	u32 reserved:28;
	199	};
	200
	201	struct acpi_device_power_state {
	202	struct {
	203	u8 valid:1;
	204	u8 explicit_set:1; /* _PSx present? */
	205	u8 reserved:6;
	206	} flags;
	207	int power; /* % Power (compared to D0) */
	208	int latency; /* Dx->D0 time (microseconds) */
	209	struct acpi_handle_list resources; /* Power resources referenced */
	210	};
	211
	212	struct acpi_device_power {
	213	int state; /* Current state */
	214	struct acpi_device_power_flags flags;
	215	struct acpi_device_power_state states[4]; /* Power states (D0-D3) */
	216	};
	217
	218	/* Performance Management */
	219
	220	struct acpi_device_perf_flags {
	221	u8 reserved:8;
	222	};
	223
	224	struct acpi_device_perf_state {
	225	struct {
	226	u8 valid:1;
	227	u8 reserved:7;
	228	} flags;
	229	u8 power; /* % Power (compared to P0) */
	230	u8 performance; /* % Performance ( " ) */
	231	int latency; /* Px->P0 time (microseconds) */
	232	};
	233
	234	struct acpi_device_perf {
	235	int state;
	236	struct acpi_device_perf_flags flags;
	237	int state_count;
	238	struct acpi_device_perf_state *states;
	239	};
	240
	241	/* Wakeup Management */
	242	struct acpi_device_wakeup_flags {
	243	u8 valid:1; /* Can successfully enable wakeup? */
	244	u8 run_wake:1; /* Run-Wake GPE devices */
	245	};
	246
	247	struct acpi_device_wakeup_state {
	248	u8 enabled:1;
	249	};
	250
	251	struct acpi_device_wakeup {
	252	acpi_handle gpe_device;
	253	acpi_integer gpe_number;
	254	acpi_integer sleep_state;
	255	struct acpi_handle_list resources;
	256	struct acpi_device_wakeup_state state;
	257	struct acpi_device_wakeup_flags flags;
	258	int prepare_count;
	259	};
	260
	261	/* Device */
	262
	263	struct acpi_device {
	264	int device_type;
	265	acpi_handle handle; /* no handle for fixed hardware */
	266	struct acpi_device *parent;
	267	struct list_head children;
	268	struct list_head node;
	269	struct list_head wakeup_list;
	270	struct acpi_device_status status;
	271	struct acpi_device_flags flags;
	272	struct acpi_device_pnp pnp;
	273	struct acpi_device_power power;
	274	struct acpi_device_wakeup wakeup;
	275	struct acpi_device_perf performance;
	276	struct acpi_device_dir dir;
	277	struct acpi_device_ops ops;
	278	struct acpi_driver *driver;
	279	void *driver_data;
	280	struct device dev;
	281	struct acpi_bus_ops bus_ops; /* workaround for different code path for hotplug */
	282	enum acpi_bus_removal_type removal_type; /* indicate for different removal type */
	283	};
	284
	285	static inline void acpi_driver_data(struct acpi_device d)
	286	{
	287	return d->driver_data;
	288	}
	289
	290	#define to_acpi_device(d) container_of(d, struct acpi_device, dev)
	291	#define to_acpi_driver(d) container_of(d, struct acpi_driver, drv)
	292
	293	/* acpi_device.dev.bus == &acpi_bus_type */
	294	extern struct bus_type acpi_bus_type;
	295
	296	/*
	297	* Events
	298	* ------
	299	*/
	300
	301	struct acpi_bus_event {
	302	struct list_head node;
	303	acpi_device_class device_class;
	304	acpi_bus_id bus_id;
	305	u32 type;
	306	u32 data;
	307	};
	308
	309	extern struct kobject *acpi_kobj;
	310	extern int acpi_bus_generate_netlink_event(const char, const char, u8, int);
	311	void acpi_bus_private_data_handler(acpi_handle, void *);
	312	int acpi_bus_get_private_data(acpi_handle, void **);
	313	extern int acpi_notifier_call_chain(struct acpi_device *, u32, u32);
	314	extern int register_acpi_notifier(struct notifier_block *);
	315	extern int unregister_acpi_notifier(struct notifier_block *);
	316
	317	extern int register_acpi_bus_notifier(struct notifier_block *nb);
	318	extern void unregister_acpi_bus_notifier(struct notifier_block *nb);
	319	/*
	320	* External Functions
	321	*/
	322
	323	int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
	324	void acpi_bus_data_handler(acpi_handle handle, void *context);
	325	acpi_status acpi_bus_get_status_handle(acpi_handle handle,
	326	unsigned long long *sta);
	327	int acpi_bus_get_status(struct acpi_device *device);
	328	int acpi_bus_get_power(acpi_handle handle, int *state);
	329	int acpi_bus_set_power(acpi_handle handle, int state);
	330	bool acpi_bus_power_manageable(acpi_handle handle);
	331	bool acpi_bus_can_wakeup(acpi_handle handle);
	332	#ifdef CONFIG_ACPI_PROC_EVENT
	333	int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data);
	334	int acpi_bus_generate_proc_event4(const char class, const char bid, u8 type, int data);
	335	int acpi_bus_receive_event(struct acpi_bus_event *event);
	336	#else
	337	static inline int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
	338	{ return 0; }
	339	#endif
	340	int acpi_bus_register_driver(struct acpi_driver *driver);
	341	void acpi_bus_unregister_driver(struct acpi_driver *driver);
	342	int acpi_bus_add(struct acpi_device *child, struct acpi_device parent,
	343	acpi_handle handle, int type);
	344	int acpi_bus_trim(struct acpi_device *start, int rmdevice);
	345	int acpi_bus_start(struct acpi_device *device);
	346	acpi_status acpi_bus_get_ejd(acpi_handle handle, acpi_handle * ejd);
	347	int acpi_match_device_ids(struct acpi_device *device,
	348	const struct acpi_device_id *ids);
	349	int acpi_create_dir(struct acpi_device *);
	350	void acpi_remove_dir(struct acpi_device *);
	351
	352	/*
	353	* Bind physical devices with ACPI devices
	354	*/
	355	struct acpi_bus_type {
	356	struct list_head list;
	357	struct bus_type *bus;
	358	/* For general devices under the bus */
	359	int (find_device) (struct device , acpi_handle *);
	360	/* For bridges, such as PCI root bridge, IDE controller */
	361	int (find_bridge) (struct device , acpi_handle *);
	362	};
	363	int register_acpi_bus_type(struct acpi_bus_type *);
	364	int unregister_acpi_bus_type(struct acpi_bus_type *);
	365	struct device *acpi_get_physical_device(acpi_handle);
	366
	367	struct acpi_pci_root {
	368	struct list_head node;
	369	struct acpi_device * device;
	370	struct acpi_pci_id id;
	371	struct pci_bus *bus;
	372	u16 segment;
	373	u8 bus_nr;
	374
	375	u32 osc_support_set; /* _OSC state of support bits */
	376	u32 osc_control_set; /* _OSC state of control bits */
	377	u32 osc_control_qry; /* the latest _OSC query result */
	378
	379	u32 osc_queried:1; /* has _OSC control been queried? */
	380	};
	381
	382	/* helper */
	383	acpi_handle acpi_get_child(acpi_handle, acpi_integer);
	384	int acpi_is_root_bridge(acpi_handle);
	385	acpi_handle acpi_get_pci_rootbridge_handle(unsigned int, unsigned int);
	386	struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
	387	#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)((dev)->archdata.acpi_handle))
	388
	389	#ifdef CONFIG_PM_SLEEP
	390	int acpi_pm_device_sleep_state(struct device , int );
	391	int acpi_pm_device_sleep_wake(struct device *, bool);
	392	#else /* !CONFIG_PM_SLEEP */
	393	static inline int acpi_pm_device_sleep_state(struct device d, int p)
	394	{
	395	if (p)
	396	*p = ACPI_STATE_D0;
	397	return ACPI_STATE_D3;
	398	}
	399	static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
	400	{
	401	return -ENODEV;
	402	}
	403	#endif /* !CONFIG_PM_SLEEP */
	404
	405	#endif /* CONFIG_ACPI */
	406
	407	#endif /__ACPI_BUS_H__/