/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ANDROID_INCLUDE_BLUETOOTH_H
#define ANDROID_INCLUDE_BLUETOOTH_H

#include <stdint.h>
#include <sys/cdefs.h>
#include <sys/types.h>

#include <hardware/hardware.h>

__BEGIN_DECLS

/**
 * The Bluetooth Hardware Module ID
 */

#define BT_HARDWARE_MODULE_ID "bluetooth"
#define BT_STACK_MODULE_ID "bluetooth"
#define BT_STACK_TEST_MODULE_ID "bluetooth_test"


/* Bluetooth profile interface IDs */

#define BT_PROFILE_HANDSFREE_ID "handsfree"
#define BT_PROFILE_ADVANCED_AUDIO_ID "a2dp"
#define BT_PROFILE_HEALTH_ID "health"
#define BT_PROFILE_SOCKETS_ID "socket"
#define BT_PROFILE_HIDHOST_ID "hidhost"
#define BT_PROFILE_PAN_ID "pan"


/** Bluetooth Address */
typedef struct {
    uint8_t address[6];
} __attribute__((packed))bt_bdaddr_t;

/** Bluetooth Device Name */
typedef struct {
    uint8_t name[248];
} __attribute__((packed))bt_bdname_t;

/** Bluetooth Adapter Visibility Modes*/
typedef enum {
    BT_SCAN_MODE_NONE,
    BT_SCAN_MODE_CONNECTABLE,
    BT_SCAN_MODE_CONNECTABLE_DISCOVERABLE
} bt_scan_mode_t;

/** Bluetooth Adapter State */
typedef enum {
    BT_STATE_OFF,
    BT_STATE_ON
}   bt_state_t;

/** Bluetooth Error Status */
/** We need to build on this */

typedef enum {
    BT_STATUS_SUCCESS,
    BT_STATUS_FAIL,
    BT_STATUS_NOT_READY,
    BT_STATUS_NOMEM,
    BT_STATUS_BUSY,
    BT_STATUS_DONE,        /* request already completed */
    BT_STATUS_UNSUPPORTED,
    BT_STATUS_PARM_INVALID,
    BT_STATUS_UNHANDLED,
    BT_STATUS_AUTH_FAILURE,
    BT_STATUS_RMT_DEV_DOWN

} bt_status_t;

/** Bluetooth PinKey Code */
typedef struct {
    uint8_t pin[16];
} __attribute__((packed))bt_pin_code_t;

/** Bluetooth Adapter Discovery state */
typedef enum {
    BT_DISCOVERY_STOPPED,
    BT_DISCOVERY_STARTED
} bt_discovery_state_t;

/** Bluetooth ACL connection state */
typedef enum {
    BT_ACL_STATE_CONNECTED,
    BT_ACL_STATE_DISCONNECTED
} bt_acl_state_t;

/** Bluetooth 128-bit UUID */
typedef struct {
   uint8_t uu[16];
} bt_uuid_t;

/** Bluetooth SDP service record */
typedef struct
{
   bt_uuid_t uuid;
   uint16_t channel;
   char name[256]; // what's the maximum length
} bt_service_record_t;

/* Bluetooth Adapter and Remote Device property types */
typedef enum {
    /* Properties common to both adapter and remote device */
    /**
     * Description - Bluetooth Device Name
     * Access mode - Adapter name can be GET/SET. Remote device can be GET
     * Data type   - bt_bdname_t
     */
    BT_PROPERTY_BDNAME = 0x1,
    /**
     * Description - Bluetooth Device Address
     * Access mode - Only GET.
     * Data type   - bt_bdaddr_t
     */
    BT_PROPERTY_BDADDR,
    /**
     * Description - Bluetooth Service 128-bit UUIDs
     * Access mode - Only GET.
     * Data type   - Array of bt_uuid_t (Array size inferred from property length).
     */
    BT_PROPERTY_UUIDS,
    /**
     * Description - Bluetooth Class of Device as found in Assigned Numbers
     * Access mode - Only GET.
     * Data type   - uint32_t.
     */
    BT_PROPERTY_CLASS_OF_DEVICE,
    /**
     * Description - Device Type - BREDR, BLE or DUAL Mode
     * Access mode - Only GET.
     * Data type   - bt_device_type_t
     */
    BT_PROPERTY_TYPE_OF_DEVICE,
    /**
     * Description - Bluetooth Service Record
     * Access mode - Only GET.
     * Data type   - bt_service_record_t
     */
    BT_PROPERTY_SERVICE_RECORD,

    /* Properties unique to adapter */
    /**
     * Description - Bluetooth Adapter scan mode
     * Access mode - GET and SET
     * Data type   - bt_scan_mode_t.
     */
    BT_PROPERTY_ADAPTER_SCAN_MODE,
    /**
     * Description - List of bonded devices
     * Access mode - Only GET.
     * Data type   - Array of bt_bdaddr_t of the bonded remote devices
     *               (Array size inferred from property length).
     */
    BT_PROPERTY_ADAPTER_BONDED_DEVICES,
    /**
     * Description - Bluetooth Adapter Discovery timeout (in seconds)
     * Access mode - GET and SET
     * Data type   - uint32_t
     */
    BT_PROPERTY_ADAPTER_DISCOVERY_TIMEOUT,

    /* Properties unique to remote device */
    /**
     * Description - User defined friendly name of the remote device
     * Access mode - GET and SET
     * Data type   - bt_bdname_t.
     */
    BT_PROPERTY_REMOTE_FRIENDLY_NAME,
    /**
     * Description - RSSI value of the inquired remote device
     * Access mode - Only GET.
     * Data type   - int32_t.
     */
    BT_PROPERTY_REMOTE_RSSI,

    BT_PROPERTY_REMOTE_DEVICE_TIMESTAMP = 0xFF,
} bt_property_type_t;

/** Bluetooth Adapter Property data structure */
typedef struct
{
    bt_property_type_t type;
    int len;
    void *val;
} bt_property_t;

/** Bluetooth Device Type */
typedef enum {
    BT_DEVICE_DEVTYPE_BREDR = 0x1,
    BT_DEVICE_DEVTYPE_BLE,
    BT_DEVICE_DEVTYPE_DUAL
} bt_device_type_t;
/** Bluetooth Bond state */
typedef enum {
    BT_BOND_STATE_NONE,
    BT_BOND_STATE_BONDING,
    BT_BOND_STATE_BONDED
} bt_bond_state_t;

/** Bluetooth SSP Bonding Variant */
typedef enum {
    BT_SSP_VARIANT_PASSKEY_CONFIRMATION,
    BT_SSP_VARIANT_PASSKEY_ENTRY,
    BT_SSP_VARIANT_CONSENT,
    BT_SSP_VARIANT_PASSKEY_NOTIFICATION
} bt_ssp_variant_t;

#define BT_MAX_NUM_UUIDS 32

/** Bluetooth Interface callbacks */

/** Bluetooth Enable/Disable Callback. */
typedef void (*adapter_state_changed_callback)(bt_state_t state);

/** GET/SET Adapter Properties callback */
/* TODO: For the GET/SET property APIs/callbacks, we may need a session
 * identifier to associate the call with the callback. This would be needed
 * whenever more than one simultaneous instance of the same adapter_type
 * is get/set.
 *
 * If this is going to be handled in the Java framework, then we do not need
 * to manage sessions here.
 */
typedef void (*adapter_properties_callback)(bt_status_t status,
                                               int num_properties,
                                               bt_property_t *properties);

/** GET/SET Remote Device Properties callback */
/** TODO: For remote device properties, do not see a need to get/set
 * multiple properties - num_properties shall be 1
 */
typedef void (*remote_device_properties_callback)(bt_status_t status,
                                                       bt_bdaddr_t *bd_addr,
                                                       int num_properties,
                                                       bt_property_t *properties);

/** New device discovered callback */
/** If EIR data is not present, then BD_NAME and RSSI shall be NULL and -1
 * respectively */
typedef void (*device_found_callback)(int num_properties,
                                         bt_property_t *properties);

/** Discovery state changed callback */
typedef void (*discovery_state_changed_callback)(bt_discovery_state_t state);

/** Bluetooth Legacy PinKey Request callback */
typedef void (*pin_request_callback)(bt_bdaddr_t *remote_bd_addr,
                                        bt_bdname_t *bd_name, uint32_t cod);

/** Bluetooth SSP Request callback - Just Works & Numeric Comparison*/
/** pass_key - Shall be 0 for BT_SSP_PAIRING_VARIANT_CONSENT &
 *  BT_SSP_PAIRING_PASSKEY_ENTRY */
/* TODO: Passkey request callback shall not be needed for devices with display
 * capability. We still need support this in the stack for completeness */
typedef void (*ssp_request_callback)(bt_bdaddr_t *remote_bd_addr,
                                        bt_bdname_t *bd_name,
                                        uint32_t cod,
                                        bt_ssp_variant_t pairing_variant,
                                     uint32_t pass_key);

/** Bluetooth Bond state changed callback */
/* Invoked in response to create_bond, cancel_bond or remove_bond */
typedef void (*bond_state_changed_callback)(bt_status_t status,
                                               bt_bdaddr_t *remote_bd_addr,
                                               bt_bond_state_t state);

/** Bluetooth ACL connection state changed callback */
typedef void (*acl_state_changed_callback)(bt_status_t status, bt_bdaddr_t *remote_bd_addr,
                                            bt_acl_state_t state);

typedef enum {
    ASSOCIATE_JVM,
    DISASSOCIATE_JVM
} bt_cb_thread_evt;

/** Thread Associate/Disassociate JVM Callback */
/* Callback that is invoked by the callback thread to allow upper layer to attach/detach to/from
 * the JVM */
typedef void (*callback_thread_event)(bt_cb_thread_evt evt);

/** Bluetooth Test Mode Callback */
/* Receive any HCI event from controller. Must be in DUT Mode for this callback to be received */
typedef void (*dut_mode_recv_callback)(uint16_t opcode, uint8_t *buf, uint8_t len);

/** TODO: Add callbacks for Link Up/Down and other generic
  *  notifications/callbacks */

/** Bluetooth DM callback structure. */
typedef struct {
    /** set to sizeof(bt_callbacks_t) */
    size_t size;
    adapter_state_changed_callback adapter_state_changed_cb;
    adapter_properties_callback adapter_properties_cb;
    remote_device_properties_callback remote_device_properties_cb;
    device_found_callback device_found_cb;
    discovery_state_changed_callback discovery_state_changed_cb;
    pin_request_callback pin_request_cb;
    ssp_request_callback ssp_request_cb;
    bond_state_changed_callback bond_state_changed_cb;
    acl_state_changed_callback acl_state_changed_cb;
    callback_thread_event thread_evt_cb;
    dut_mode_recv_callback dut_mode_recv_cb;
} bt_callbacks_t;

/** NOTE: By default, no profiles are initialized at the time of init/enable.
 *  Whenever the application invokes the 'init' API of a profile, then one of
 *  the following shall occur:
 *
 *    1.) If Bluetooth is not enabled, then the Bluetooth core shall mark the
 *        profile as enabled. Subsequently, when the application invokes the
 *        Bluetooth 'enable', as part of the enable sequence the profile that were
 *        marked shall be enabled by calling appropriate stack APIs. The
 *        'adapter_properties_cb' shall return the list of UUIDs of the
 *        enabled profiles.
 *
 *    2.) If Bluetooth is enabled, then the Bluetooth core shall invoke the stack
 *        profile API to initialize the profile and trigger a
 *        'adapter_properties_cb' with the current list of UUIDs including the
 *        newly added profile's UUID.
 *
 *   The reverse shall occur whenever the profile 'cleanup' APIs are invoked
 */

/** Represents the standard Bluetooth DM interface. */
typedef struct {
    /** set to sizeof(bt_interface_t) */
    size_t size;
    /**
     * Opens the interface and provides the callback routines
     * to the implemenation of this interface.
     */
    int (*init)(bt_callbacks_t* callbacks );

    /** Enable Bluetooth. */
    int (*enable)(void);

    /** Disable Bluetooth. */
    int (*disable)(void);

    /** Closes the interface. */
    void (*cleanup)(void);

    /** Get all Bluetooth Adapter properties at init */
    int (*get_adapter_properties)(void);

    /** Get Bluetooth Adapter property of 'type' */
    int (*get_adapter_property)(bt_property_type_t type);

    /** Set Bluetooth Adapter property of 'type' */
    /* Based on the type, val shall be one of
     * bt_bdaddr_t or bt_bdname_t or bt_scanmode_t etc
     */
    int (*set_adapter_property)(const bt_property_t *property);

    /** Get all Remote Device properties */
    int (*get_remote_device_properties)(bt_bdaddr_t *remote_addr);

    /** Get Remote Device property of 'type' */
    int (*get_remote_device_property)(bt_bdaddr_t *remote_addr,
                                      bt_property_type_t type);

    /** Set Remote Device property of 'type' */
    int (*set_remote_device_property)(bt_bdaddr_t *remote_addr,
                                      const bt_property_t *property);

    /** Get Remote Device's service record  for the given UUID */
    int (*get_remote_service_record)(bt_bdaddr_t *remote_addr,
                                     bt_uuid_t *uuid);

    /** Start SDP to get remote services */
    int (*get_remote_services)(bt_bdaddr_t *remote_addr);

    /** Start Discovery */
    int (*start_discovery)(void);

    /** Cancel Discovery */
    int (*cancel_discovery)(void);

    /** Create Bluetooth Bonding */
    int (*create_bond)(const bt_bdaddr_t *bd_addr);

    /** Remove Bond */
    int (*remove_bond)(const bt_bdaddr_t *bd_addr);

    /** Cancel Bond */
    int (*cancel_bond)(const bt_bdaddr_t *bd_addr);

    /** BT Legacy PinKey Reply */
    /** If accept==FALSE, then pin_len and pin_code shall be 0x0 */
    int (*pin_reply)(const bt_bdaddr_t *bd_addr, uint8_t accept,
                     uint8_t pin_len, bt_pin_code_t *pin_code);

    /** BT SSP Reply - Just Works, Numeric Comparison and Passkey
     * passkey shall be zero for BT_SSP_VARIANT_PASSKEY_COMPARISON &
     * BT_SSP_VARIANT_CONSENT
     * For BT_SSP_VARIANT_PASSKEY_ENTRY, if accept==FALSE, then passkey
     * shall be zero */
    int (*ssp_reply)(const bt_bdaddr_t *bd_addr, bt_ssp_variant_t variant,
                     uint8_t accept, uint32_t passkey);

    /** Get Bluetooth profile interface */
    const void* (*get_profile_interface) (const char *profile_id);

    /** Bluetooth Test Mode APIs - Bluetooth must be enabled for these APIs */
    /* Configure DUT Mode - Use this mode to enter/exit DUT mode */
    int (*dut_mode_configure)(uint8_t enable);

    /* Send any test HCI (vendor-specific) command to the controller. Must be in DUT Mode */
    int (*dut_mode_send)(uint16_t opcode, uint8_t *buf, uint8_t len);
} bt_interface_t;

/** TODO: Need to add APIs for Service Discovery, Service authorization and
  *       connection management. Also need to add APIs for configuring
  *       properties of remote bonded devices such as name, UUID etc. */

typedef struct {
    struct hw_device_t common;
    const bt_interface_t* (*get_bluetooth_interface)();
} bluetooth_device_t;

typedef bluetooth_device_t bluetooth_module_t;
__END_DECLS

#endif /* ANDROID_INCLUDE_BLUETOOTH_H */
