/*
 *  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);
acpi_status
acpi_evaluate_hotplug_ost(acpi_handle handle, u32 source_event,
                        u32 status_code, struct acpi_buffer *status_buf);

acpi_status
acpi_get_physical_device_location(acpi_handle handle, struct acpi_pld_info **pld);
#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_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 Scan Handler
 * -----------------
 */

enum acpi_hotplug_mode {
        AHM_GENERIC = 0,
        AHM_CONTAINER,
        AHM_COUNT
};

struct acpi_hotplug_profile {
        struct kobject kobj;
        bool enabled:1;
        enum acpi_hotplug_mode mode;
};

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;
        int (*attach)(struct acpi_device *dev, const struct acpi_device_id *id);
        void (*detach)(struct acpi_device *dev);
        struct acpi_hotplug_profile hotplug;
};

/*
 * 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 eject_pending:1;
        u32 match_driver:1;
        u32 reserved:26;
};

/* 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;
        char *id;
};

struct acpi_pnp_type {
        u32 hardware_id:1;
        u32 bus_address:1;
        u32 reserved:30;
};

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 */
        unsigned long sun;              /* _SUN */
};

#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_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 os_accessible: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 run_wake:1;          /* Run-Wake GPE devices */
        u8 notifier_present:1;  /* Wake-up notify handler has been installed */
};

struct acpi_device_wakeup {
        acpi_handle gpe_device;
        u64 gpe_number;
        u64 sleep_state;
        struct list_head resources;
        struct acpi_device_wakeup_flags flags;
        int prepare_count;
};

struct acpi_device_physical_node {
        unsigned int node_id;
        struct list_head node;
        struct device *dev;
        bool put_online:1;
};

/* 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_scan_handler *handler;
        struct acpi_driver *driver;
        void *driver_data;
        struct device dev;
        unsigned int physical_node_count;
        struct list_head physical_node_list;
        struct mutex physical_node_lock;
        struct list_head power_dependent;
        void (*remove)(struct acpi_device *);
};

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;
};

struct acpi_eject_event {
        struct acpi_device      *device;
        u32             event;
};

struct acpi_hp_work {
        struct work_struct work;
        acpi_handle handle;
        u32 type;
        void *context;
};
void alloc_acpi_hp_work(acpi_handle handle, u32 type, void *context,
                        void (*func)(struct work_struct *work));

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_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);
bool acpi_bus_power_manageable(acpi_handle handle);

#ifdef CONFIG_PM
bool acpi_bus_can_wakeup(acpi_handle handle);
#else
static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
#endif

#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

void acpi_scan_lock_acquire(void);
void acpi_scan_lock_release(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_hot_remove_device(void *context);
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);
int acpi_create_dir(struct acpi_device *);
void acpi_remove_dir(struct acpi_device *);


/**
 * 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, \
                      acpi_bus_unregister_driver)

/*
 * Bind physical devices with ACPI devices
 */
struct acpi_bus_type {
        struct list_head list;
        const char *name;
        bool (*match)(struct device *dev);
        int (*find_device) (struct device *, acpi_handle *);
        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 *);

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 */
acpi_handle acpi_find_child(acpi_handle, u64, bool);
static inline acpi_handle acpi_get_child(acpi_handle handle, u64 addr)
{
        return acpi_find_child(handle, addr, false);
}
int acpi_is_root_bridge(acpi_handle);
struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle);
#define DEVICE_ACPI_HANDLE(dev) ((acpi_handle)ACPI_HANDLE(dev))

int acpi_enable_wakeup_device_power(struct acpi_device *dev, int state);
int acpi_disable_wakeup_device_power(struct acpi_device *dev);

#ifdef CONFIG_PM
acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
                                 acpi_notify_handler handler, void *context);
acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
                                    acpi_notify_handler handler);
int acpi_pm_device_sleep_state(struct device *, int *, int);
void acpi_dev_pm_add_dependent(acpi_handle handle, struct device *depdev);
void acpi_dev_pm_remove_dependent(acpi_handle handle, struct device *depdev);
#else
static inline acpi_status acpi_add_pm_notifier(struct acpi_device *adev,
                                               acpi_notify_handler handler,
                                               void *context)
{
        return AE_SUPPORT;
}
static inline acpi_status acpi_remove_pm_notifier(struct acpi_device *adev,
                                                  acpi_notify_handler handler)
{
        return AE_SUPPORT;
}
static inline int acpi_pm_device_sleep_state(struct device *d, int *p, int m)
{
        if (p)
                *p = ACPI_STATE_D0;

        return (m >= ACPI_STATE_D0 && m <= ACPI_STATE_D3) ? m : ACPI_STATE_D0;
}
static inline void acpi_dev_pm_add_dependent(acpi_handle handle,
                                             struct device *depdev) {}
static inline void acpi_dev_pm_remove_dependent(acpi_handle handle,
                                                struct device *depdev) {}
#endif

#ifdef CONFIG_PM_RUNTIME
int __acpi_device_run_wake(struct acpi_device *, bool);
int acpi_pm_device_run_wake(struct device *, bool);
#else
static inline int __acpi_device_run_wake(struct acpi_device *adev, bool en)
{
        return -ENODEV;
}
static inline int acpi_pm_device_run_wake(struct device *dev, bool enable)
{
        return -ENODEV;
}
#endif

#ifdef CONFIG_PM_SLEEP
int __acpi_device_sleep_wake(struct acpi_device *, u32, bool);
int acpi_pm_device_sleep_wake(struct device *, bool);
#else
static inline int __acpi_device_sleep_wake(struct acpi_device *adev,
                                           u32 target_state, bool enable)
{
        return -ENODEV;
}
static inline int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
{
        return -ENODEV;
}
#endif

#ifdef CONFIG_ACPI_SLEEP
u32 acpi_target_system_state(void);
#else
static inline u32 acpi_target_system_state(void) { return ACPI_STATE_S0; }
#endif

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.os_accessible;
}

#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__*/