/*
 * Copyright 2005-2008, Haiku Inc. All Rights Reserved.
 * Distributed under the terms of the MIT License
 */
#ifndef _ACPI_H
#define _ACPI_H


#include <device_manager.h>
#include <KernelExport.h>


typedef struct acpi_module_info acpi_module_info;
typedef struct acpi_object_type acpi_object_type;

#define B_ACPI_MODULE_NAME "bus_managers/acpi/v1"

/* This must be uint64 for 64 bit! */
typedef uint32 acpi_physical_address;
typedef uint32 acpi_io_address;
typedef uint32 acpi_size;

/* Actually a ptr to a NS Node */
typedef void *				acpi_handle;

#ifndef __ACTYPES_H__

/* Address Space (Operation Region) Types */

enum {
	ACPI_ADR_SPACE_SYSTEM_MEMORY	= 0,
	ACPI_ADR_SPACE_SYSTEM_IO		= 1,
	ACPI_ADR_SPACE_PCI_CONFIG		= 2,
	ACPI_ADR_SPACE_EC				= 3,
	ACPI_ADR_SPACE_SMBUS			= 4,
	ACPI_ADR_SPACE_CMOS 			= 5,
	ACPI_ADR_SPACE_PCI_BAR_TARGET	= 6,
	ACPI_ADR_SPACE_DATA_TABLE		= 7,
	ACPI_ADR_SPACE_FIXED_HARDWARE	= 127
};

/* ACPI fixed event types */

enum {
	ACPI_EVENT_PMTIMER = 0,
	ACPI_EVENT_GLOBAL,
	ACPI_EVENT_POWER_BUTTON,
	ACPI_EVENT_SLEEP_BUTTON,
	ACPI_EVENT_RTC
};

/* ACPI Object Types */

enum {
	ACPI_TYPE_ANY = 0,
	ACPI_TYPE_INTEGER,
	ACPI_TYPE_STRING,
	ACPI_TYPE_BUFFER,
	ACPI_TYPE_PACKAGE,
	ACPI_TYPE_FIELD_UNIT,
	ACPI_TYPE_DEVICE,
	ACPI_TYPE_EVENT,
	ACPI_TYPE_METHOD,
	ACPI_TYPE_MUTEX,
	ACPI_TYPE_REGION,
	ACPI_TYPE_POWER,
	ACPI_TYPE_PROCESSOR,
	ACPI_TYPE_THERMAL,
	ACPI_TYPE_BUFFER_FIELD,
	ACPI_TYPE_LOCAL_REFERENCE = 0x14
};

/* ACPI control method arg type */

struct acpi_object_type {
	uint32 object_type;
	union {
		uint32 integer;
		struct {
			uint32 len;
			char *string; /* You have to allocate string space yourself */
		} string;
		struct {
			size_t length;
			void *buffer;
		} buffer;
		struct {
			uint32 count;
			acpi_object_type *objects;
		} package;
		struct {
	        uint32 actual_type;
	        acpi_handle handle;
	    } reference;
		struct {
			uint32 cpu_id;
			int pblk_address;
			size_t pblk_length;
		} processor;
		struct {
			uint32 min_power_state;
			uint32 resource_order;
		} power_resource;
	} data;
};


/*
 * List of objects, used as a parameter list for control method evaluation
 */
typedef struct acpi_objects {
    uint32				count;
    acpi_object_type	*pointer;
} acpi_objects;


typedef struct acpi_data {
    acpi_size			length;         /* Length in bytes of the buffer */
    void				*pointer;       /* pointer to buffer */
} acpi_data;


enum {
	ACPI_ALLOCATE_BUFFER = -1,
};


#endif	// __ACTYPES_H__


#ifndef __ACRESTYP_H__


typedef struct acpi_prt
{
    uint32              length;
    uint32              pin;
    int			        address;        /* here for 64-bit alignment */
    uint32              sourceIndex;
    char                source[4];		/* pad to 64 bits so sizeof() works in
    									all cases */
} acpi_pci_routing_table;


#endif // __ACRESTYP_H__


typedef uint32 (*acpi_event_handler)(void *Context);

typedef status_t (*acpi_adr_space_handler)(uint32 function,
	acpi_physical_address address, uint32 bitWidth, int *value,
	void *handlerContext, void *regionContext);

typedef status_t (*acpi_adr_space_setup)(acpi_handle regionHandle,
	uint32 function, void *handlerContext, void **regionContext);

typedef void (*acpi_notify_handler)(acpi_handle device, uint32 value,
	void *context);


struct acpi_module_info {
	module_info info;

	status_t	(*get_handle)(acpi_handle parent, char *pathname,
					acpi_handle *retHandle);

	/* Global Lock */

	status_t	(*acquire_global_lock)(uint16 timeout, uint32 *handle);
	status_t	(*release_global_lock)(uint32 handle);

	/* Notify Handler */

    status_t	(*install_notify_handler)(acpi_handle device,
    				uint32 handlerType, acpi_notify_handler handler,
    				void *context);
	status_t	(*remove_notify_handler)(acpi_handle device,
    				uint32 handlerType, acpi_notify_handler handler);

	/* GPE Handler */

	status_t	(*enable_gpe)(acpi_handle handle, uint32 gpeNumber,
					uint32 flags);
	status_t	(*set_gpe_type)(acpi_handle handle, uint32 gpeNumber,
					uint8 type);
	status_t	(*install_gpe_handler)(acpi_handle handle, uint32 gpeNumber,
					uint32 type, acpi_event_handler handler, void *data);
	status_t	(*remove_gpe_handler)(acpi_handle handle, uint32 gpeNumber,
					acpi_event_handler address);

	/* Address Space Handler */

	status_t	(*install_address_space_handler)(acpi_handle handle,
					uint32 spaceId,
					acpi_adr_space_handler handler,
					acpi_adr_space_setup setup,	void *data);
	status_t	(*remove_address_space_handler)(acpi_handle handle,
					uint32 spaceId,
					acpi_adr_space_handler handler);

	/* Fixed Event Management */

	void		(*enable_fixed_event)(uint32 event);
	void		(*disable_fixed_event)(uint32 event);

	uint32		(*fixed_event_status) (uint32 event);
					/* Returns 1 if event set, 0 otherwise */
	void		(*reset_fixed_event) (uint32 event);

	status_t	(*install_fixed_event_handler)(uint32 event,
					interrupt_handler *handler, void *data);
	status_t	(*remove_fixed_event_handler)(uint32 event,
					interrupt_handler *handler);

	/* Namespace Access */

	status_t	(*get_next_entry)(uint32 objectType, const char *base,
					char *result, size_t length, void **_counter);
	status_t	(*get_device)(const char *hid, uint32 index, char *result,
					size_t resultLength);

	status_t	(*get_device_hid)(const char *path, char *hid,
					size_t hidLength);
	uint32		(*get_object_type)(const char *path);
	status_t	(*get_object)(const char *path,
					acpi_object_type **_returnValue);
	status_t	(*get_object_typed)(const char *path,
					acpi_object_type **_returnValue, uint32 objectType);
	status_t	(*ns_handle_to_pathname)(acpi_handle targetHandle,
					acpi_data *buffer);

	/* Control method execution and data acquisition */

	status_t	(*evaluate_object)(const char* object,
					acpi_object_type *returnValue, size_t bufferLength);
	status_t	(*evaluate_method)(acpi_handle handle, const char *method,
					acpi_objects *args, acpi_data *returnValue);

	/* Resource info */

	status_t	(*get_irq_routing_table)(acpi_handle busDeviceHandle,
					acpi_data *retBuffer);

	/* Power state setting */

	status_t	(*prepare_sleep_state)(uint8 state, void (*wakeFunc)(void),
					size_t size);
	status_t	(*enter_sleep_state)(uint8 state);
	status_t	(*reboot)(void);
};


/* Sleep states */

enum {
	ACPI_POWER_STATE_ON = 0,
	ACPI_POWER_STATE_SLEEP_S1,
	ACPI_POWER_STATE_SLEEP_S2,
	ACPI_POWER_STATE_SLEEP_S3,
	ACPI_POWER_STATE_HIBERNATE,
	ACPI_POWER_STATE_OFF
};


#define ACPI_DEVICE_HID_ITEM	"acpi/hid"
#define ACPI_DEVICE_PATH_ITEM	"acpi/path"
#define ACPI_DEVICE_TYPE_ITEM	"acpi/type"


typedef struct acpi_device_cookie *acpi_device;

//	Interface to one ACPI device.
typedef struct acpi_device_module_info {
	driver_module_info info;

	/* Notify Handler */

	status_t	(*install_notify_handler)(acpi_device device,
    				uint32 handlerType, acpi_notify_handler handler,
    				void *context);
	status_t	(*remove_notify_handler)(acpi_device device,
    				uint32 handlerType, acpi_notify_handler handler);

	/* Address Space Handler */
	status_t	(*install_address_space_handler)(acpi_device device,
					uint32 spaceId,
					acpi_adr_space_handler handler,
					acpi_adr_space_setup setup,	void *data);
	status_t	(*remove_address_space_handler)(acpi_device device,
					uint32 spaceId,
					acpi_adr_space_handler handler);

	/* Namespace Access */
	uint32		(*get_object_type)(acpi_device device);
	status_t	(*get_object)(acpi_device device, const char *path,
					acpi_object_type **_returnValue);

	/* Control method execution and data acquisition */
	status_t	(*evaluate_method)(acpi_device device, const char *method,
					acpi_objects *args, acpi_data *returnValue);
} acpi_device_module_info;


#endif	/* _ACPI_H */