/******************************************************************************
 *
 *  Copyright (C) 2009-2013 Broadcom Corporation
 *
 *  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.
 *
 ******************************************************************************/

#define LOG_TAG "bt_bta_hh"

#include "bta_api.h"
#include "bta_hh_int.h"

#if (defined BTA_HH_LE_INCLUDED && BTA_HH_LE_INCLUDED == TRUE)

#include <string.h>

#include "bta_api.h"
#include "bta_gatt_api.h"
#include "bta_hh_co.h"
#include "btm_api.h"
#include "btm_ble_api.h"
#include "btm_int.h"
#include "osi/include/log.h"
#include "srvc_api.h"
#include "stack/include/l2c_api.h"
#include "utl.h"

#ifndef BTA_HH_LE_RECONN
#define BTA_HH_LE_RECONN    TRUE
#endif

#define BTA_HH_APP_ID_LE            0xff

#define BTA_HH_LE_RPT_TYPE_VALID(x)     ((x) <= BTA_LE_HID_RPT_FEATURE && (x)>=BTA_LE_HID_RPT_INPUT)

#define BTA_HH_LE_PROTO_BOOT_MODE      0x00
#define BTA_HH_LE_PROTO_REPORT_MODE      0x01

#define BTA_LE_HID_RTP_UUID_MAX     5
static const UINT16 bta_hh_uuid_to_rtp_type[BTA_LE_HID_RTP_UUID_MAX][2] =
{
    {GATT_UUID_HID_REPORT,       BTA_HH_RPTT_INPUT},
    {GATT_UUID_HID_BT_KB_INPUT,  BTA_HH_RPTT_INPUT},
    {GATT_UUID_HID_BT_KB_OUTPUT, BTA_HH_RPTT_OUTPUT},
    {GATT_UUID_HID_BT_MOUSE_INPUT, BTA_HH_RPTT_INPUT},
    {GATT_UUID_BATTERY_LEVEL,      BTA_HH_RPTT_INPUT}
};


static void bta_hh_gattc_callback(tBTA_GATTC_EVT event, tBTA_GATTC *p_data);
static void bta_hh_le_register_scpp_notif(tBTA_HH_DEV_CB *p_dev_cb, tBTA_GATT_STATUS status);
static void bta_hh_le_register_scpp_notif_cmpl(tBTA_HH_DEV_CB *p_dev_cb, tBTA_GATT_STATUS status);
static void bta_hh_le_add_dev_bg_conn(tBTA_HH_DEV_CB *p_cb, BOOLEAN check_bond);
//TODO(jpawlowski): uncomment when fixed
// static void bta_hh_process_cache_rpt (tBTA_HH_DEV_CB *p_cb,
//                                       tBTA_HH_RPT_CACHE_ENTRY *p_rpt_cache,
//                                       UINT8 num_rpt);

#define GATT_READ_CHAR 0
#define GATT_READ_DESC 1
#define GATT_WRITE_CHAR 2
#define GATT_WRITE_DESC 3

/* Holds pending GATT operations */
typedef struct {
    UINT8 type;
    UINT16 conn_id;
    UINT16 handle;

    /* write-specific fields */
    tBTA_GATTC_WRITE_TYPE write_type;
    UINT16  len;
    UINT8   p_value[GATT_MAX_ATTR_LEN];
} gatt_operation;

static list_t *gatt_op_queue = NULL; // list of gatt_operation
static list_t *gatt_op_queue_executing = NULL; // list of UINT16 connection ids that currently execute

static void mark_as_executing(UINT16 conn_id) {
    UINT16 *executing_conn_id = osi_malloc(sizeof(UINT16));
    *executing_conn_id = conn_id;
    if (!gatt_op_queue_executing)
        gatt_op_queue_executing = list_new(osi_free);

    list_append(gatt_op_queue_executing, executing_conn_id);
}

static bool rm_exec_conn_id(void *data, void *context) {
    UINT16 *conn_id = context;
    UINT16 *conn_id2 = data;
    if (*conn_id == *conn_id2)
        list_remove(gatt_op_queue_executing, data);

    return TRUE;
}

static void mark_as_not_executing(UINT16 conn_id) {
    if (gatt_op_queue_executing)
        list_foreach(gatt_op_queue_executing, rm_exec_conn_id, &conn_id);
}

static bool exec_list_contains(void *data, void *context) {
    UINT16 *conn_id = context;
    UINT16 *conn_id2 = data;
    if (*conn_id == *conn_id2)
        return FALSE;

    return TRUE;
}

static bool rm_op_by_conn_id(void *data, void *context) {
    UINT16 *conn_id = context;
    gatt_operation *op = data;
    if(op->conn_id == *conn_id)
        list_remove(gatt_op_queue, data);

    return TRUE;
}

static void gatt_op_queue_clean(UINT16 conn_id) {
    if (gatt_op_queue)
        list_foreach(gatt_op_queue, rm_op_by_conn_id, &conn_id);

    mark_as_not_executing(conn_id);
}

static bool find_op_by_conn_id(void *data, void *context) {
    UINT16 *conn_id = context;
    gatt_operation *op = data;
    if(op->conn_id == *conn_id)
        return FALSE;

    return TRUE;
}

static void gatt_execute_next_op(UINT16 conn_id) {
    APPL_TRACE_DEBUG("%s:", __func__, conn_id);
    if (!gatt_op_queue || list_is_empty(gatt_op_queue)) {
        APPL_TRACE_DEBUG("%s: op queue is empty", __func__);
        return;
    }

    list_node_t *op_node = list_foreach(gatt_op_queue, find_op_by_conn_id, &conn_id);
    if (op_node == NULL) {
        APPL_TRACE_DEBUG("%s: no more operations queued for conn_id %d", __func__, conn_id);
        return;
    }
    gatt_operation *op = list_node(op_node);

    if (gatt_op_queue_executing && list_foreach(gatt_op_queue_executing, exec_list_contains, &conn_id)) {
        APPL_TRACE_DEBUG("%s: can't enqueue next op, already executing", __func__);
        return;
    }

    if (op->type == GATT_READ_CHAR) {
        mark_as_executing(conn_id);
        BTA_GATTC_ReadCharacteristic(op->conn_id, op->handle, BTA_GATT_AUTH_REQ_NONE);
        list_remove(gatt_op_queue, op);

    } else if (op->type == GATT_READ_DESC) {
        mark_as_executing(conn_id);
        BTA_GATTC_ReadCharDescr(op->conn_id, op->handle, BTA_GATT_AUTH_REQ_NONE);
        list_remove(gatt_op_queue, op);
    } else if (op->type == GATT_WRITE_CHAR) {
        mark_as_executing(conn_id);
        BTA_GATTC_WriteCharValue(op->conn_id, op->handle, op->write_type, op->len,
                                 op->p_value, BTA_GATT_AUTH_REQ_NONE);

        list_remove(gatt_op_queue, op);
    } else if (op->type == GATT_WRITE_DESC) {
        tBTA_GATT_UNFMT value;
        value.len = op->len;
        value.p_value = op->p_value;

        mark_as_executing(conn_id);
        BTA_GATTC_WriteCharDescr(op->conn_id, op->handle, BTA_GATTC_TYPE_WRITE,
                                 &value, BTA_GATT_AUTH_REQ_NONE);
        list_remove(gatt_op_queue, op);
    }
}

static void gatt_queue_read_op(UINT8 op_type, UINT16 conn_id, UINT16 handle) {
  if (gatt_op_queue == NULL) {
    gatt_op_queue = list_new(osi_free);
  }

  gatt_operation *op = osi_malloc(sizeof(gatt_operation));
  op->type = op_type;
  op->conn_id = conn_id;
  op->handle = handle;

  list_append(gatt_op_queue, op);
  gatt_execute_next_op(conn_id);
}

static void gatt_queue_write_op(UINT8 op_type, UINT16 conn_id, UINT16 handle, UINT16 len,
                        UINT8 *p_value, tBTA_GATTC_WRITE_TYPE write_type) {
  if (gatt_op_queue == NULL) {
    gatt_op_queue = list_new(osi_free);
  }

  gatt_operation *op = osi_malloc(sizeof(gatt_operation));
  op->type = op_type;
  op->conn_id = conn_id;
  op->handle = handle;
  op->write_type = write_type;
  op->len = len;
  memcpy(op->p_value, p_value, len);

  list_append(gatt_op_queue, op);
  gatt_execute_next_op(conn_id);
}

#if BTA_HH_DEBUG == TRUE
static const char *bta_hh_le_rpt_name[4] =
{
    "UNKNOWN",
    "INPUT",
    "OUTPUT",
    "FEATURE"
};

/*******************************************************************************
**
** Function         bta_hh_le_hid_report_dbg
**
** Description      debug function to print out all HID report available on remote
**                  device.
**
** Returns          void
**
*******************************************************************************/
static void bta_hh_le_hid_report_dbg(tBTA_HH_DEV_CB *p_cb)
{
    APPL_TRACE_DEBUG("%s: HID Report DB", __func__);

    if (!p_cb->hid_srvc.in_use)
        return;

    tBTA_HH_LE_RPT  *p_rpt = &p_cb->hid_srvc.report[0];

    for (int j = 0; j < BTA_HH_LE_RPT_MAX; j ++, p_rpt++)
    {
        char *  rpt_name = "Unknown";

        if (!p_rpt->in_use)
            break;

        if (p_rpt->uuid == GATT_UUID_HID_REPORT)
            rpt_name = "Report";
        if (p_rpt->uuid == GATT_UUID_HID_BT_KB_INPUT)
            rpt_name = "Boot KB Input";
        if (p_rpt->uuid == GATT_UUID_HID_BT_KB_OUTPUT)
            rpt_name = "Boot KB Output";
        if (p_rpt->uuid == GATT_UUID_HID_BT_MOUSE_INPUT)
            rpt_name = "Boot MI Input";

        APPL_TRACE_DEBUG("\t\t [%s- 0x%04x] [Type: %s], [ReportID: %d] [srvc_inst_id: %d] [char_inst_id: %d] [Clt_cfg: %d]",
            rpt_name,
            p_rpt->uuid ,
            ((p_rpt->rpt_type < 4) ? bta_hh_le_rpt_name[p_rpt->rpt_type] : "UNKNOWN"),
            p_rpt->rpt_id,
            p_rpt->srvc_inst_id,
            p_rpt->char_inst_id,
            p_rpt->client_cfg_value);
    }
}

/*******************************************************************************
**
** Function         bta_hh_uuid_to_str
**
** Description
**
** Returns          void
**
*******************************************************************************/
static char *bta_hh_uuid_to_str(UINT16 uuid)
{
    switch(uuid)
    {
        case GATT_UUID_HID_INFORMATION:
            return "GATT_UUID_HID_INFORMATION";
        case GATT_UUID_HID_REPORT_MAP:
            return "GATT_UUID_HID_REPORT_MAP";
        case GATT_UUID_HID_CONTROL_POINT:
            return "GATT_UUID_HID_CONTROL_POINT";
        case GATT_UUID_HID_REPORT:
            return "GATT_UUID_HID_REPORT";
        case GATT_UUID_HID_PROTO_MODE:
            return "GATT_UUID_HID_PROTO_MODE";
        case GATT_UUID_HID_BT_KB_INPUT:
            return "GATT_UUID_HID_BT_KB_INPUT";
        case GATT_UUID_HID_BT_KB_OUTPUT:
            return "GATT_UUID_HID_BT_KB_OUTPUT";
        case GATT_UUID_HID_BT_MOUSE_INPUT:
            return "GATT_UUID_HID_BT_MOUSE_INPUT";
        case GATT_UUID_CHAR_CLIENT_CONFIG:
            return "GATT_UUID_CHAR_CLIENT_CONFIG";
        case GATT_UUID_EXT_RPT_REF_DESCR:
            return "GATT_UUID_EXT_RPT_REF_DESCR";
        case GATT_UUID_RPT_REF_DESCR:
            return "GATT_UUID_RPT_REF_DESCR";
        default:
            return "Unknown UUID";
    }
}

#endif
/*******************************************************************************
**
** Function         bta_hh_le_enable
**
** Description      initialize LE HID related functionality
**
**
** Returns          void
**
*******************************************************************************/
void bta_hh_le_enable(void)
{
    char       app_name[LEN_UUID_128 + 1];
    tBT_UUID    app_uuid = {LEN_UUID_128,{0}};
    UINT8       xx;

    bta_hh_cb.gatt_if = BTA_GATTS_INVALID_IF;

    for (xx = 0; xx < BTA_HH_MAX_DEVICE; xx ++)
        bta_hh_cb.le_cb_index[xx]       = BTA_HH_IDX_INVALID;

    memset (app_name, 0, LEN_UUID_128 + 1);
    strncpy(app_name, "BTA HH OVER LE", LEN_UUID_128);

    memcpy((void *)app_uuid.uu.uuid128, (void *)app_name, LEN_UUID_128);

    BTA_GATTC_AppRegister(&app_uuid, bta_hh_gattc_callback);

    return;
}

/*******************************************************************************
**
** Function         bta_hh_le_register_cmpl
**
** Description      BTA HH register with BTA GATTC completed
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_register_cmpl(tBTA_GATTC_REG *p_reg)
{
    tBTA_HH_STATUS      status = BTA_HH_ERR;

    if (p_reg->status == BTA_GATT_OK)
    {
        bta_hh_cb.gatt_if = p_reg->client_if;
        status = BTA_HH_OK;
    }
    else
        bta_hh_cb.gatt_if = BTA_GATTS_INVALID_IF;

    /* signal BTA call back event */
    (* bta_hh_cb.p_cback)(BTA_HH_ENABLE_EVT, (tBTA_HH *)&status);
}

/*******************************************************************************
**
** Function         bta_hh_le_is_hh_gatt_if
**
** Description      Check to see if client_if is BTA HH LE GATT interface
**
**
** Returns          whether it is HH GATT IF
**
*******************************************************************************/
BOOLEAN bta_hh_le_is_hh_gatt_if(tBTA_GATTC_IF client_if)
{
    return (bta_hh_cb.gatt_if == client_if);
}

/*******************************************************************************
**
** Function         bta_hh_le_deregister
**
** Description      De-register BTA HH from BTA GATTC
**
**
** Returns          void
**
*******************************************************************************/
void bta_hh_le_deregister(void)
{
    BTA_GATTC_AppDeregister(bta_hh_cb.gatt_if);
}

/*******************************************************************************
**
** Function         bta_hh_is_le_device
**
** Description      Check to see if the remote device is a LE only device
**
** Parameters:
**
*******************************************************************************/
BOOLEAN bta_hh_is_le_device(tBTA_HH_DEV_CB *p_cb, BD_ADDR remote_bda)
{
    p_cb->is_le_device = BTM_UseLeLink (remote_bda);

    return p_cb->is_le_device;
}

/*******************************************************************************
**
** Function         bta_hh_le_open_conn
**
** Description      open a GATT connection first.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_open_conn(tBTA_HH_DEV_CB *p_cb, BD_ADDR remote_bda)
{
    /* update cb_index[] map */
    p_cb->hid_handle = BTA_HH_GET_LE_DEV_HDL(p_cb->index);
    memcpy(p_cb->addr, remote_bda, BD_ADDR_LEN);
    bta_hh_cb.le_cb_index[BTA_HH_GET_LE_CB_IDX(p_cb->hid_handle)] = p_cb->index;
    p_cb->in_use = TRUE;

    BTA_GATTC_Open(bta_hh_cb.gatt_if, remote_bda, TRUE, BTA_GATT_TRANSPORT_LE);
}

/*******************************************************************************
**
** Function         bta_hh_le_find_dev_cb_by_conn_id
**
** Description      Utility function find a device control block by connection ID.
**
*******************************************************************************/
tBTA_HH_DEV_CB * bta_hh_le_find_dev_cb_by_conn_id(UINT16 conn_id)
{
    UINT8   i;
    tBTA_HH_DEV_CB *p_dev_cb = &bta_hh_cb.kdev[0];

    for (i = 0; i < BTA_HH_MAX_DEVICE; i ++, p_dev_cb ++)
    {
        if (p_dev_cb->in_use  && p_dev_cb->conn_id == conn_id)
            return p_dev_cb;
    }
    return NULL;
}

/*******************************************************************************
**
** Function         bta_hh_le_find_dev_cb_by_bda
**
** Description      Utility function find a device control block by BD address.
**
*******************************************************************************/
tBTA_HH_DEV_CB * bta_hh_le_find_dev_cb_by_bda(BD_ADDR bda)
{
    UINT8   i;
    tBTA_HH_DEV_CB *p_dev_cb = &bta_hh_cb.kdev[0];

    for (i = 0; i < BTA_HH_MAX_DEVICE; i ++, p_dev_cb ++)
    {
        if (p_dev_cb->in_use  &&
            memcmp(p_dev_cb->addr, bda, BD_ADDR_LEN) == 0)
            return p_dev_cb;
    }
    return NULL;
}

/*******************************************************************************
**
** Function         bta_hh_le_find_service_inst_by_battery_inst_id
**
** Description      find HID service instance ID by battery service instance ID
**
*******************************************************************************/
UINT8 bta_hh_le_find_service_inst_by_battery_inst_id(tBTA_HH_DEV_CB *p_cb, UINT8 ba_inst_id)
{
    if (p_cb->hid_srvc.in_use &&
        p_cb->hid_srvc.incl_srvc_inst == ba_inst_id)
    {
        return p_cb->hid_srvc.srvc_inst_id;
    }
    return BTA_HH_IDX_INVALID;
}

/*******************************************************************************
**
** Function         bta_hh_le_find_report_entry
**
** Description      find the report entry by service instance and report UUID and
**                  instance ID
**
*******************************************************************************/
tBTA_HH_LE_RPT * bta_hh_le_find_report_entry(tBTA_HH_DEV_CB *p_cb,
                                             UINT8  srvc_inst_id,  /* service instance ID */
                                             UINT16 rpt_uuid,
                                             UINT8  char_inst_id)
{
    UINT8   i;
    UINT8   hid_inst_id = srvc_inst_id;
    tBTA_HH_LE_RPT *p_rpt;

    if (rpt_uuid == GATT_UUID_BATTERY_LEVEL)
    {
        hid_inst_id = bta_hh_le_find_service_inst_by_battery_inst_id(p_cb, srvc_inst_id);

        if (hid_inst_id == BTA_HH_IDX_INVALID)
            return NULL;
    }

    p_rpt = &p_cb->hid_srvc.report[0];

    for (i = 0; i < BTA_HH_LE_RPT_MAX; i ++, p_rpt ++)
    {
        if (p_rpt->uuid == rpt_uuid &&
            p_rpt->srvc_inst_id == srvc_inst_id &&
            p_rpt->char_inst_id == char_inst_id)
        {

            return p_rpt;
        }
    }
    return NULL;

}

/*******************************************************************************
**
** Function         bta_hh_le_find_rpt_by_idtype
**
** Description      find a report entry by report ID and protocol mode
**
** Returns          void
**
*******************************************************************************/
tBTA_HH_LE_RPT * bta_hh_le_find_rpt_by_idtype(tBTA_HH_LE_RPT*p_head, UINT8 mode,
                                              tBTA_HH_RPT_TYPE r_type, UINT8 rpt_id)
{
    tBTA_HH_LE_RPT *p_rpt = p_head;
    UINT8   i;

#if BTA_HH_DEBUG == TRUE
    APPL_TRACE_DEBUG("bta_hh_le_find_rpt_by_idtype: r_type: %d rpt_id: %d", r_type, rpt_id);
#endif

    for (i = 0 ; i < BTA_HH_LE_RPT_MAX; i ++, p_rpt++)
    {
        if (p_rpt->in_use && p_rpt->rpt_id == rpt_id && r_type == p_rpt->rpt_type)
        {
            /* return battery report w/o condition */
            if (p_rpt->uuid == GATT_UUID_BATTERY_LEVEL)
                return p_rpt;

            if (mode == BTA_HH_PROTO_RPT_MODE && p_rpt->uuid == GATT_UUID_HID_REPORT)
                return p_rpt;

            if ( mode ==BTA_HH_PROTO_BOOT_MODE &&
                (p_rpt->uuid >= GATT_UUID_HID_BT_KB_INPUT && p_rpt->uuid <= GATT_UUID_HID_BT_MOUSE_INPUT))
                return p_rpt;
        }
    }
    return NULL;
}

/*******************************************************************************
**
** Function         bta_hh_le_find_alloc_report_entry
**
** Description      find or allocate a report entry in the HID service report list.
**
*******************************************************************************/
tBTA_HH_LE_RPT * bta_hh_le_find_alloc_report_entry(tBTA_HH_DEV_CB *p_cb,
                                                   UINT8 srvc_inst_id,
                                                   UINT16 rpt_uuid,
                                                   UINT8  inst_id)
{
    UINT8   i, hid_inst_id = srvc_inst_id;
    tBTA_HH_LE_RPT *p_rpt;

    if (rpt_uuid == GATT_UUID_BATTERY_LEVEL)
    {
        hid_inst_id = bta_hh_le_find_service_inst_by_battery_inst_id(p_cb, srvc_inst_id);

        if (hid_inst_id == BTA_HH_IDX_INVALID)
            return NULL;
    }
    p_rpt = &p_cb->hid_srvc.report[0];

    for (i = 0; i < BTA_HH_LE_RPT_MAX; i ++, p_rpt ++)
    {
        if (!p_rpt->in_use ||
            (p_rpt->uuid == rpt_uuid &&
             p_rpt->srvc_inst_id == srvc_inst_id &&
             p_rpt->char_inst_id == inst_id))
        {
            if (!p_rpt->in_use)
            {
                p_rpt->in_use   = TRUE;
                p_rpt->index    = i;
                p_rpt->srvc_inst_id = srvc_inst_id;
                p_rpt->char_inst_id = inst_id;
                p_rpt->uuid     = rpt_uuid;

                /* assign report type */
                for (i = 0; i < BTA_LE_HID_RTP_UUID_MAX; i ++)
                {
                    if (bta_hh_uuid_to_rtp_type[i][0] == rpt_uuid)
                    {
                        p_rpt->rpt_type = (tBTA_HH_RPT_TYPE)bta_hh_uuid_to_rtp_type[i][1];

                        if (rpt_uuid == GATT_UUID_HID_BT_KB_INPUT || rpt_uuid == GATT_UUID_HID_BT_KB_OUTPUT)
                            p_rpt->rpt_id = BTA_HH_KEYBD_RPT_ID;

                        if (rpt_uuid == GATT_UUID_HID_BT_MOUSE_INPUT)
                            p_rpt->rpt_id = BTA_HH_MOUSE_RPT_ID;

                        break;
                    }
                }
            }
            return p_rpt;
        }
    }
    return NULL;
}

static tBTA_GATTC_DESCRIPTOR *find_descriptor_by_short_uuid(UINT16 conn_id,
                                                     UINT16 char_handle,
                                                     UINT16 short_uuid) {
    const tBTA_GATTC_CHARACTERISTIC *p_char =
                BTA_GATTC_GetCharacteristic(conn_id, char_handle);

    if (!p_char) {
        LOG_WARN(LOG_TAG, "%s No such characteristic: %d", __func__, char_handle);
        return NULL;
    }

    if (!p_char->descriptors || list_is_empty(p_char->descriptors))
        return NULL;

    for (list_node_t *dn = list_begin(p_char->descriptors);
         dn != list_end(p_char->descriptors); dn = list_next(dn)) {
        tBTA_GATTC_DESCRIPTOR *p_desc = list_node(dn);

        if (p_char->uuid.len == LEN_UUID_16 &&
            p_desc->uuid.uu.uuid16 == short_uuid)
            return p_desc;
    }

    return NULL;
}

/*******************************************************************************
**
** Function         bta_hh_le_read_char_dscrpt
**
** Description      read characteristic descriptor
**
*******************************************************************************/
static tBTA_HH_STATUS bta_hh_le_read_char_dscrpt(tBTA_HH_DEV_CB *p_cb, UINT16 char_handle, UINT16 short_uuid)
{
    const tBTA_GATTC_DESCRIPTOR *p_desc = find_descriptor_by_short_uuid(p_cb->conn_id, char_handle, short_uuid);
    if (!p_desc)
        return BTA_HH_ERR;

    gatt_queue_read_op(GATT_READ_DESC, p_cb->conn_id, p_desc->handle);
    return BTA_HH_OK;
}

/*******************************************************************************
**
** Function         bta_hh_le_save_rpt_ref
**
** Description      save report reference information and move to next one.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_save_rpt_ref(tBTA_HH_DEV_CB *p_dev_cb, tBTA_HH_LE_RPT  *p_rpt,
                            tBTA_GATTC_READ *p_data)
{
    /* if the length of the descriptor value is right, parse it */
    if (p_data->status == BTA_GATT_OK &&
        p_data->p_value && p_data->p_value->len == 2)
    {
        UINT8 *pp = p_data->p_value->p_value;

        STREAM_TO_UINT8(p_rpt->rpt_id, pp);
        STREAM_TO_UINT8(p_rpt->rpt_type, pp);

        if (p_rpt->rpt_type > BTA_HH_RPTT_FEATURE) /* invalid report type */
            p_rpt->rpt_type = BTA_HH_RPTT_RESRV;

#if BTA_HH_DEBUG == TRUE
        APPL_TRACE_DEBUG("%s: report ID: %d", __func__, p_rpt->rpt_id);
#endif
        tBTA_HH_RPT_CACHE_ENTRY rpt_entry;
        rpt_entry.rpt_id    = p_rpt->rpt_id;
        rpt_entry.rpt_type  = p_rpt->rpt_type;
        rpt_entry.rpt_uuid  = p_rpt->uuid;
        rpt_entry.srvc_inst_id = p_rpt->srvc_inst_id;
        rpt_entry.char_inst_id = p_rpt->char_inst_id;

        bta_hh_le_co_rpt_info(p_dev_cb->addr,
                              &rpt_entry,
                              p_dev_cb->app_id);
    }
    else if (p_data->status == BTA_GATT_INSUF_AUTHENTICATION)
    {
        /* close connection right away */
        p_dev_cb->status = BTA_HH_ERR_AUTH_FAILED;
        /* close the connection and report service discovery complete with error */
        bta_hh_le_api_disc_act(p_dev_cb);
        return;
    }

    if (p_rpt->index < BTA_HH_LE_RPT_MAX - 1)
        p_rpt ++;
    else
        p_rpt = NULL;
}

/*******************************************************************************
**
** Function         bta_hh_le_save_rpt_ref
**
** Description      save report reference information and move to next one.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_save_ext_rpt_ref(tBTA_HH_DEV_CB *p_dev_cb,
                                tBTA_GATTC_READ *p_data)
{
    /* if the length of the descriptor value is right, parse it
      assume it's a 16 bits UUID */
    if (p_data->status == BTA_GATT_OK &&
        p_data->p_value && p_data->p_value->len == 2) {
        UINT8 *pp = p_data->p_value->p_value;
        STREAM_TO_UINT16(p_dev_cb->hid_srvc.ext_rpt_ref, pp);

#if BTA_HH_DEBUG == TRUE
        APPL_TRACE_DEBUG("%s: External Report Reference UUID 0x%04x", __func__,
                    p_dev_cb->hid_srvc.ext_rpt_ref);
#endif
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_register_input_notif
**
** Description      Register for all notifications for the report applicable
**                  for the protocol mode.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_register_input_notif(tBTA_HH_DEV_CB *p_dev_cb, UINT8 proto_mode, BOOLEAN register_ba)
{
    tBTA_HH_LE_RPT  *p_rpt = &p_dev_cb->hid_srvc.report[0];

#if BTA_HH_DEBUG == TRUE
    APPL_TRACE_DEBUG("%s: bta_hh_le_register_input_notif mode: %d", __func__, proto_mode);
#endif

    for (int i = 0; i < BTA_HH_LE_RPT_MAX; i ++, p_rpt ++)
    {
        if (p_rpt->rpt_type == BTA_HH_RPTT_INPUT)
        {

            if (register_ba && p_rpt->uuid == GATT_UUID_BATTERY_LEVEL)
            {
                BTA_GATTC_RegisterForNotifications(bta_hh_cb.gatt_if, p_dev_cb->addr,
                                                   p_rpt->char_inst_id);
            }
            /* boot mode, deregister report input notification */
            else if (proto_mode == BTA_HH_PROTO_BOOT_MODE)
            {
                if (p_rpt->uuid == GATT_UUID_HID_REPORT &&
                    p_rpt->client_cfg_value == BTA_GATT_CLT_CONFIG_NOTIFICATION)
                {
                    APPL_TRACE_DEBUG("%s ---> Deregister Report ID: %d", __func__, p_rpt->rpt_id);
                    BTA_GATTC_DeregisterForNotifications(bta_hh_cb.gatt_if, p_dev_cb->addr,
                                                         p_rpt->char_inst_id);
                }
                /* register boot reports notification */
                else if (p_rpt->uuid == GATT_UUID_HID_BT_KB_INPUT ||
                         p_rpt->uuid == GATT_UUID_HID_BT_MOUSE_INPUT)
                {
                    APPL_TRACE_DEBUG("%s <--- Register Boot Report ID: %d", __func__, p_rpt->rpt_id);
                    BTA_GATTC_RegisterForNotifications(bta_hh_cb.gatt_if, p_dev_cb->addr,
                                                       p_rpt->char_inst_id);
                }
            }
            else if (proto_mode == BTA_HH_PROTO_RPT_MODE)
            {
                if ((p_rpt->uuid == GATT_UUID_HID_BT_KB_INPUT ||
                    p_rpt->uuid == GATT_UUID_HID_BT_MOUSE_INPUT) &&
                    p_rpt->client_cfg_value == BTA_GATT_CLT_CONFIG_NOTIFICATION)
                {

                    APPL_TRACE_DEBUG("%s ---> Deregister Boot Report ID: %d", __func__, p_rpt->rpt_id);
                    BTA_GATTC_DeregisterForNotifications(bta_hh_cb.gatt_if, p_dev_cb->addr,
                                                         p_rpt->char_inst_id);
                }
                else if (p_rpt->uuid == GATT_UUID_HID_REPORT &&
                         p_rpt->client_cfg_value == BTA_GATT_CLT_CONFIG_NOTIFICATION)
                {
                    APPL_TRACE_DEBUG("%s <--- Register Report ID: %d", __func__, p_rpt->rpt_id);
                    BTA_GATTC_RegisterForNotifications(bta_hh_cb.gatt_if, p_dev_cb->addr,
                                                       p_rpt->char_inst_id);
                }
            }
            /*
            else unknow protocol mode */
        }
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_deregister_input_notif
**
** Description      Deregister all notifications
**
*******************************************************************************/
void bta_hh_le_deregister_input_notif(tBTA_HH_DEV_CB *p_dev_cb)
{
    tBTA_HH_LE_RPT  *p_rpt = &p_dev_cb->hid_srvc.report[0];

    for (UINT8 i = 0; i < BTA_HH_LE_RPT_MAX; i++, p_rpt++)
    {
        if (p_rpt->rpt_type == BTA_HH_RPTT_INPUT)
        {
            if (p_rpt->uuid == GATT_UUID_HID_REPORT &&
                p_rpt->client_cfg_value == BTA_GATT_CLT_CONFIG_NOTIFICATION)
            {
                APPL_TRACE_DEBUG("%s ---> Deregister Report ID: %d", __func__, p_rpt->rpt_id);
                BTA_GATTC_DeregisterForNotifications(bta_hh_cb.gatt_if, p_dev_cb->addr,
                                                    p_rpt->char_inst_id);
            }
            else if ((p_rpt->uuid == GATT_UUID_HID_BT_KB_INPUT ||
                p_rpt->uuid == GATT_UUID_HID_BT_MOUSE_INPUT) &&
                p_rpt->client_cfg_value == BTA_GATT_CLT_CONFIG_NOTIFICATION)
            {
                APPL_TRACE_DEBUG("%s ---> Deregister Boot Report ID: %d", __func__, p_rpt->rpt_id);
                BTA_GATTC_DeregisterForNotifications(bta_hh_cb.gatt_if, p_dev_cb->addr,
                                                    p_rpt->char_inst_id);
            }
        }
    }
}


/*******************************************************************************
**
** Function         bta_hh_le_open_cmpl
**
** Description      HID over GATT connection sucessfully opened
**
*******************************************************************************/
void bta_hh_le_open_cmpl(tBTA_HH_DEV_CB *p_cb)
{
    if ( p_cb->disc_active == BTA_HH_LE_DISC_NONE)
    {
#if BTA_HH_DEBUG
        bta_hh_le_hid_report_dbg(p_cb);
#endif
        bta_hh_le_register_input_notif(p_cb, p_cb->mode, TRUE);
        bta_hh_sm_execute(p_cb, BTA_HH_OPEN_CMPL_EVT, NULL);

#if (BTA_HH_LE_RECONN == TRUE)
        if (p_cb->status == BTA_HH_OK)
        {
            bta_hh_le_add_dev_bg_conn(p_cb, TRUE);
        }
#endif
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_write_char_clt_cfg
**
** Description      Utility function to find and write client configuration of
**                  a characteristic
**
*******************************************************************************/
BOOLEAN bta_hh_le_write_char_clt_cfg(tBTA_HH_DEV_CB *p_cb,
                                     UINT8 char_handle,
                                     UINT16 clt_cfg_value)
{
    UINT8                      buf[2], *pp = buf;

    tBTA_GATTC_DESCRIPTOR *p_desc = find_descriptor_by_short_uuid(p_cb->conn_id,
                                       char_handle, GATT_UUID_CHAR_CLIENT_CONFIG);
    if (!p_desc)
        return FALSE;

    UINT16_TO_STREAM(pp, clt_cfg_value);
    gatt_queue_write_op(GATT_WRITE_DESC, p_cb->conn_id,
                        p_desc->handle, 2, buf, BTA_GATTC_TYPE_WRITE);
    return TRUE;
}

/*******************************************************************************
**
** Function         bta_hh_le_write_rpt_clt_cfg
**
** Description      write client configuration. This is only for input report
**                  enable all input notification upon connection open.
**
*******************************************************************************/
BOOLEAN bta_hh_le_write_rpt_clt_cfg(tBTA_HH_DEV_CB *p_cb, UINT8 srvc_inst_id)
{
    UINT8           i;
    tBTA_HH_LE_RPT  *p_rpt = &p_cb->hid_srvc.report[p_cb->clt_cfg_idx];

    for (i = p_cb->clt_cfg_idx; i < BTA_HH_LE_RPT_MAX && p_rpt->in_use; i ++, p_rpt ++)
    {
        /* enable notification for all input report, regardless mode */
        if (p_rpt->rpt_type == BTA_HH_RPTT_INPUT)
        {
            if (bta_hh_le_write_char_clt_cfg(p_cb,
                                             p_rpt->char_inst_id,
                                             BTA_GATT_CLT_CONFIG_NOTIFICATION))
            {
                p_cb->clt_cfg_idx = i;
                return TRUE;
            }
        }
    }
    p_cb->clt_cfg_idx = 0;

    /* client configuration is completed, send open callback */
    if (p_cb->state == BTA_HH_W4_CONN_ST)
    {
        p_cb->disc_active &= ~BTA_HH_LE_DISC_HIDS;

        bta_hh_le_open_cmpl(p_cb);
    }
    return FALSE;
}

/*******************************************************************************
**
** Function         bta_hh_le_set_protocol_mode
**
** Description      Set remote device protocol mode.
**
*******************************************************************************/
BOOLEAN bta_hh_le_set_protocol_mode(tBTA_HH_DEV_CB *p_cb, tBTA_HH_PROTO_MODE mode)
{
    tBTA_HH_CBDATA      cback_data;
    BOOLEAN             exec = FALSE;

    APPL_TRACE_DEBUG("%s attempt mode: %s", __func__,
                     (mode == BTA_HH_PROTO_RPT_MODE)? "Report": "Boot");

    cback_data.handle  = p_cb->hid_handle;
    /* boot mode is not supported in the remote device */
    if (p_cb->hid_srvc.proto_mode_handle == 0)
    {
        p_cb->mode  = BTA_HH_PROTO_RPT_MODE;

        if (mode == BTA_HH_PROTO_BOOT_MODE)
        {
            APPL_TRACE_ERROR("Set Boot Mode failed!! No PROTO_MODE Char!");
            cback_data.status = BTA_HH_ERR;
        }
        else
        {
            /* if set to report mode, need to de-register all input report notification */
            bta_hh_le_register_input_notif(p_cb, p_cb->mode, FALSE);
            cback_data.status = BTA_HH_OK;
        }
        if (p_cb->state == BTA_HH_W4_CONN_ST)
        {
            p_cb->status = (cback_data.status == BTA_HH_OK)? BTA_HH_OK: BTA_HH_ERR_PROTO;
        }
        else
            (* bta_hh_cb.p_cback)(BTA_HH_SET_PROTO_EVT, (tBTA_HH *)&cback_data);
    } else if (p_cb->mode != mode) {
        p_cb->mode = mode;
        mode = (mode == BTA_HH_PROTO_BOOT_MODE)? BTA_HH_LE_PROTO_BOOT_MODE : BTA_HH_LE_PROTO_REPORT_MODE;

        gatt_queue_write_op(GATT_WRITE_CHAR, p_cb->conn_id, p_cb->hid_srvc.proto_mode_handle, 1,
                            &mode, BTA_GATTC_TYPE_WRITE_NO_RSP);
        exec        = TRUE;
    }

    return exec;
}

/*******************************************************************************
**
** Function         bta_hh_le_get_protocol_mode
**
** Description      Get remote device protocol mode.
**
*******************************************************************************/
void bta_hh_le_get_protocol_mode(tBTA_HH_DEV_CB *p_cb)
{
    tBTA_HH_HSDATA    hs_data;
    p_cb->w4_evt = BTA_HH_GET_PROTO_EVT;

    if (p_cb->hid_srvc.in_use && p_cb->hid_srvc.proto_mode_handle != 0) {
        gatt_queue_read_op(GATT_READ_CHAR, p_cb->conn_id, p_cb->hid_srvc.proto_mode_handle);
        return;
    }

    /* no service support protocol_mode, by default report mode */
    hs_data.status  = BTA_HH_OK;
    hs_data.handle  = p_cb->hid_handle;
    hs_data.rsp_data.proto_mode = BTA_HH_PROTO_RPT_MODE;
    p_cb->w4_evt = 0;
    (* bta_hh_cb.p_cback)(BTA_HH_GET_PROTO_EVT, (tBTA_HH *)&hs_data);
}

/*******************************************************************************
**
** Function         bta_hh_le_dis_cback
**
** Description      DIS read complete callback
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_dis_cback(BD_ADDR addr, tDIS_VALUE *p_dis_value)
{
    tBTA_HH_DEV_CB *p_cb = bta_hh_le_find_dev_cb_by_bda(addr);


    if (p_cb == NULL || p_dis_value == NULL)
    {
        APPL_TRACE_ERROR("received unexpected/error DIS callback");
        return;
    }

    p_cb->disc_active &= ~BTA_HH_LE_DISC_DIS;
    /* plug in the PnP info for this device */
    if (p_dis_value->attr_mask & DIS_ATTR_PNP_ID_BIT)
    {
#if BTA_HH_DEBUG == TRUE
        APPL_TRACE_DEBUG("Plug in PnP info: product_id = %02x, vendor_id = %04x, version = %04x",
                p_dis_value->pnp_id.product_id,
                p_dis_value->pnp_id.vendor_id,
                p_dis_value->pnp_id.product_version);
#endif
        p_cb->dscp_info.product_id = p_dis_value->pnp_id.product_id;
        p_cb->dscp_info.vendor_id  = p_dis_value->pnp_id.vendor_id;
        p_cb->dscp_info.version    = p_dis_value->pnp_id.product_version;
    }
    bta_hh_le_open_cmpl(p_cb);
}

/*******************************************************************************
**
** Function         bta_hh_le_pri_service_discovery
**
** Description      Initialize GATT discovery on the remote LE HID device by opening
**                  a GATT connection first.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_pri_service_discovery(tBTA_HH_DEV_CB *p_cb)
{
    tBT_UUID        pri_srvc;

    bta_hh_le_co_reset_rpt_cache(p_cb->addr, p_cb->app_id);

    p_cb->disc_active |= (BTA_HH_LE_DISC_HIDS|BTA_HH_LE_DISC_DIS);

    /* read DIS info */
    if (!DIS_ReadDISInfo(p_cb->addr, bta_hh_le_dis_cback, DIS_ATTR_PNP_ID_BIT))
    {
        APPL_TRACE_ERROR("read DIS failed");
        p_cb->disc_active &= ~BTA_HH_LE_DISC_DIS;
    }

    /* in parallel */
    /* start primary service discovery for HID service */
    pri_srvc.len        = LEN_UUID_16;
    pri_srvc.uu.uuid16  = UUID_SERVCLASS_LE_HID;
    BTA_GATTC_ServiceSearchRequest(p_cb->conn_id, &pri_srvc);
    return;
}

/*******************************************************************************
**
** Function         bta_hh_le_encrypt_cback
**
** Description      link encryption complete callback for bond verification.
**
** Returns          None
**
*******************************************************************************/
void bta_hh_le_encrypt_cback(BD_ADDR bd_addr, tBTA_GATT_TRANSPORT transport,
                                    void *p_ref_data, tBTM_STATUS result)
{
    UINT8   idx = bta_hh_find_cb(bd_addr);
    tBTA_HH_DEV_CB *p_dev_cb;
    UNUSED(p_ref_data);
    UNUSED (transport);

    if (idx != BTA_HH_IDX_INVALID)
        p_dev_cb = &bta_hh_cb.kdev[idx];
    else
    {
        APPL_TRACE_ERROR("unexpected encryption callback, ignore");
        return;
    }
    p_dev_cb->status = (result == BTM_SUCCESS) ? BTA_HH_OK : BTA_HH_ERR_SEC;
    p_dev_cb->reason = result;

    bta_hh_sm_execute(p_dev_cb, BTA_HH_ENC_CMPL_EVT, NULL);
}

/*******************************************************************************
**
** Function         bta_hh_security_cmpl
**
** Description      Security check completed, start the service discovery
**                  if no cache available, otherwise report connection open completed
**
** Parameters:
**
*******************************************************************************/
void bta_hh_security_cmpl(tBTA_HH_DEV_CB *p_cb, tBTA_HH_DATA *p_buf)
{
    UNUSED(p_buf);

    APPL_TRACE_DEBUG("%s", __func__);
    if (p_cb->status == BTA_HH_OK)
    {
        if (!p_cb->hid_srvc.in_use)
        {
            APPL_TRACE_DEBUG("bta_hh_security_cmpl no reports loaded, try to load");

            /* start loading the cache if not in stack */
            //TODO(jpawlowski): cache storage is broken, fix it
            // tBTA_HH_RPT_CACHE_ENTRY     *p_rpt_cache;
            // UINT8                       num_rpt = 0;
            // if ((p_rpt_cache = bta_hh_le_co_cache_load(p_cb->addr, &num_rpt, p_cb->app_id)) != NULL)
            // {
            //     bta_hh_process_cache_rpt(p_cb, p_rpt_cache, num_rpt);
            // }
        }
        /*  discovery has been done for HID service */
        if (p_cb->app_id != 0 && p_cb->hid_srvc.in_use)
        {
            APPL_TRACE_DEBUG("%s: discovery has been done for HID service", __func__);
            /* configure protocol mode */
            if (bta_hh_le_set_protocol_mode(p_cb, p_cb->mode) == FALSE)
            {
                bta_hh_le_open_cmpl(p_cb);
            }
        }
        /* start primary service discovery for HID service */
        else
        {
            APPL_TRACE_DEBUG("%s: Starting service discovery", __func__);
            bta_hh_le_pri_service_discovery(p_cb);
        }
    }
    else
    {
        APPL_TRACE_ERROR("%s() - encryption failed; status=0x%04x, reason=0x%04x",
                __FUNCTION__, p_cb->status, p_cb->reason);
        if (!(p_cb->status == BTA_HH_ERR_SEC && p_cb->reason == BTM_ERR_PROCESSING))
            bta_hh_le_api_disc_act(p_cb);
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_notify_enc_cmpl
**
** Description      process GATT encryption complete event
**
** Returns
**
*******************************************************************************/
void bta_hh_le_notify_enc_cmpl(tBTA_HH_DEV_CB *p_cb, tBTA_HH_DATA *p_buf)
{
    if (p_cb == NULL || p_cb->security_pending == FALSE ||
        p_buf == NULL || p_buf->le_enc_cmpl.client_if != bta_hh_cb.gatt_if)
    {
        return;
    }

    p_cb->security_pending = FALSE;
    bta_hh_start_security(p_cb, NULL);
}

/*******************************************************************************
**
** Function         bta_hh_clear_service_cache
**
** Description      clear the service cache
**
** Parameters:
**
*******************************************************************************/
void bta_hh_clear_service_cache(tBTA_HH_DEV_CB *p_cb)
{
    tBTA_HH_LE_HID_SRVC     *p_hid_srvc = &p_cb->hid_srvc;

    p_cb->app_id = 0;
    p_cb->dscp_info.descriptor.dsc_list = NULL;

    osi_free_and_reset((void **)&p_hid_srvc->rpt_map);
    memset(p_hid_srvc, 0, sizeof(tBTA_HH_LE_HID_SRVC));
}

/*******************************************************************************
**
** Function         bta_hh_start_security
**
** Description      start the security check of the established connection
**
** Parameters:
**
*******************************************************************************/
void bta_hh_start_security(tBTA_HH_DEV_CB *p_cb, tBTA_HH_DATA *p_buf)
{
    UINT8           sec_flag=0;
    tBTM_SEC_DEV_REC  *p_dev_rec;
    UNUSED(p_buf);

    p_dev_rec = btm_find_dev(p_cb->addr);
    if (p_dev_rec)
    {
        if (p_dev_rec->sec_state == BTM_SEC_STATE_ENCRYPTING ||
            p_dev_rec->sec_state == BTM_SEC_STATE_AUTHENTICATING)
        {
            /* if security collision happened, wait for encryption done */
            p_cb->security_pending = TRUE;
            return;
        }
    }

    /* verify bond */
    BTM_GetSecurityFlagsByTransport(p_cb->addr, &sec_flag, BT_TRANSPORT_LE);

    /* if link has been encrypted */
    if (sec_flag & BTM_SEC_FLAG_ENCRYPTED)
    {
        bta_hh_sm_execute(p_cb, BTA_HH_ENC_CMPL_EVT, NULL);
    }
    /* if bonded and link not encrypted */
    else if (sec_flag & BTM_SEC_FLAG_LKEY_KNOWN)
    {
        sec_flag = BTM_BLE_SEC_ENCRYPT;
        p_cb->status = BTA_HH_ERR_AUTH_FAILED;
        BTM_SetEncryption(p_cb->addr, BTA_TRANSPORT_LE, bta_hh_le_encrypt_cback, NULL, sec_flag);
    }
    /* unbonded device, report security error here */
    else if (p_cb->sec_mask != BTA_SEC_NONE)
    {
        sec_flag = BTM_BLE_SEC_ENCRYPT_NO_MITM;
        p_cb->status = BTA_HH_ERR_AUTH_FAILED;
        bta_hh_clear_service_cache(p_cb);
        BTM_SetEncryption(p_cb->addr, BTA_TRANSPORT_LE, bta_hh_le_encrypt_cback, NULL, sec_flag);
    }
    /* otherwise let it go through */
    else
    {
        bta_hh_sm_execute(p_cb, BTA_HH_ENC_CMPL_EVT, NULL);
    }


}

/*******************************************************************************
**
** Function         bta_hh_gatt_open
**
** Description      process GATT open event.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_gatt_open(tBTA_HH_DEV_CB *p_cb, tBTA_HH_DATA *p_buf)
{
    tBTA_GATTC_OPEN *p_data = &p_buf->le_open;
    UINT8           *p2;
    tHID_STATUS     status = BTA_HH_ERR;

    /* if received invalid callback data , ignore it */
    if (p_cb == NULL || p_data == NULL)
        return;

    p2 = p_data->remote_bda;

    APPL_TRACE_DEBUG("bta_hh_gatt_open BTA_GATTC_OPEN_EVT bda= [%08x%04x] status =%d",
                      ((p2[0])<<24)+((p2[1])<<16)+((p2[2])<<8)+(p2[3]),
                      ((p2[4])<<8)+ p2[5],p_data->status);

    if (p_data->status == BTA_GATT_OK)
    {
        p_cb->is_le_device  = TRUE;
        p_cb->in_use    = TRUE;
        p_cb->conn_id   = p_data->conn_id;
        p_cb->hid_handle = BTA_HH_GET_LE_DEV_HDL(p_cb->index);

        bta_hh_cb.le_cb_index[BTA_HH_GET_LE_CB_IDX(p_cb->hid_handle)] = p_cb->index;

        gatt_op_queue_clean(p_cb->conn_id);

#if BTA_HH_DEBUG == TRUE
        APPL_TRACE_DEBUG("hid_handle = %2x conn_id = %04x cb_index = %d", p_cb->hid_handle, p_cb->conn_id, p_cb->index);
#endif

        bta_hh_sm_execute(p_cb, BTA_HH_START_ENC_EVT, NULL);

    }
    else /* open failure */
    {
        bta_hh_sm_execute(p_cb, BTA_HH_SDP_CMPL_EVT, (tBTA_HH_DATA *)&status);
    }

}

/*******************************************************************************
**
** Function         bta_hh_le_close
**
** Description      This function process the GATT close event and post it as a
**                  BTA HH internal event
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_close(tBTA_GATTC_CLOSE * p_data)
{
    tBTA_HH_DEV_CB *p_dev_cb = bta_hh_le_find_dev_cb_by_bda(p_data->remote_bda);
    UINT16  sm_event = BTA_HH_GATT_CLOSE_EVT;

    if (p_dev_cb != NULL) {
        tBTA_HH_LE_CLOSE *p_buf =
            (tBTA_HH_LE_CLOSE *)osi_malloc(sizeof(tBTA_HH_LE_CLOSE));
        p_buf->hdr.event = sm_event;
        p_buf->hdr.layer_specific = (UINT16)p_dev_cb->hid_handle;
        p_buf->conn_id = p_data->conn_id;
        p_buf->reason = p_data->reason;

        p_dev_cb->conn_id = BTA_GATT_INVALID_CONN_ID;
        p_dev_cb->security_pending = FALSE;
        bta_sys_sendmsg(p_buf);
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_gatt_disc_cmpl
**
** Description      Check to see if the remote device is a LE only device
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_gatt_disc_cmpl(tBTA_HH_DEV_CB *p_cb, tBTA_HH_STATUS status)
{
    APPL_TRACE_DEBUG("bta_hh_le_gatt_disc_cmpl ");

    /* if open sucessful or protocol mode not desired, keep the connection open but inform app */
    if (status == BTA_HH_OK || status == BTA_HH_ERR_PROTO)
    {
        /* assign a special APP ID temp, since device type unknown */
        p_cb->app_id = BTA_HH_APP_ID_LE;

        /* set report notification configuration */
        p_cb->clt_cfg_idx = 0;
        bta_hh_le_write_rpt_clt_cfg(p_cb, p_cb->hid_srvc.srvc_inst_id);
    }
    else /* error, close the GATT connection */
    {
        /* close GATT connection if it's on */
        bta_hh_le_api_disc_act(p_cb);
    }
}

void process_included(tBTA_HH_DEV_CB *p_dev_cb, tBTA_GATTC_SERVICE *service) {
    if (!service->included_svc || list_is_empty(service->included_svc)) {
        APPL_TRACE_ERROR("%s: Remote device does not have battery level", __func__);
        return;
    }

    for (list_node_t *isn = list_begin(service->included_svc);
         isn != list_end(service->included_svc); isn = list_next(isn)) {
        tBTA_GATTC_INCLUDED_SVC *p_isvc = list_node(isn);
        tBTA_GATTC_SERVICE *incl_svc = p_isvc->included_service;
        if (incl_svc->uuid.uu.uuid16 == UUID_SERVCLASS_BATTERY &&
            incl_svc->uuid.len == LEN_UUID_16) {

            /* read include service UUID */
            p_dev_cb->hid_srvc.incl_srvc_inst = incl_svc->handle;

            for (list_node_t *cn = list_begin(incl_svc->characteristics);
                 cn != list_end(incl_svc->characteristics); cn = list_next(cn)) {
                tBTA_GATTC_CHARACTERISTIC *p_char = list_node(cn);
                if (p_char->uuid.uu.uuid16 == GATT_UUID_BATTERY_LEVEL &&
                    p_char->uuid.len == LEN_UUID_16) {

                    if (bta_hh_le_find_alloc_report_entry(p_dev_cb,
                                                          incl_svc->s_handle,
                                                          GATT_UUID_BATTERY_LEVEL,
                                                          p_char->handle) == NULL)
                        APPL_TRACE_ERROR("Add battery report entry failed !!!");

                    gatt_queue_read_op(GATT_READ_CHAR, p_dev_cb->conn_id, p_char->handle);
                    return;
                }
            }
        }
    }

    APPL_TRACE_ERROR("%s: Remote device does not have battery level", __func__);
}

/*******************************************************************************
**
** Function         bta_hh_le_search_hid_chars
**
** Description      This function discover all characteristics a service and
**                  all descriptors available.
**
** Parameters:
**
*******************************************************************************/
static void bta_hh_le_search_hid_chars(tBTA_HH_DEV_CB *p_dev_cb, tBTA_GATTC_SERVICE *service)
{
    tBTA_HH_LE_RPT *p_rpt;

    for (list_node_t *cn = list_begin(service->characteristics);
         cn != list_end(service->characteristics); cn = list_next(cn)) {
        tBTA_GATTC_CHARACTERISTIC *p_char = list_node(cn);

        if(p_char->uuid.len != LEN_UUID_16)
            continue;

        LOG_DEBUG(LOG_TAG, "%s: %s 0x%04d", __func__, bta_hh_uuid_to_str(p_char->uuid.uu.uuid16),
                  p_char->uuid.uu.uuid16);

        switch (p_char->uuid.uu.uuid16)
        {
        case GATT_UUID_HID_CONTROL_POINT:
            p_dev_cb->hid_srvc.control_point_handle = p_char->handle;
            break;
        case GATT_UUID_HID_INFORMATION:
        case GATT_UUID_HID_REPORT_MAP:
            /* read the char value */
            gatt_queue_read_op(GATT_READ_CHAR, p_dev_cb->conn_id, p_char->handle);

            bta_hh_le_read_char_dscrpt(p_dev_cb, p_char->handle,
                                   GATT_UUID_EXT_RPT_REF_DESCR);
            break;

        case GATT_UUID_HID_REPORT:
            p_rpt = bta_hh_le_find_alloc_report_entry(p_dev_cb,
                                              p_dev_cb->hid_srvc.srvc_inst_id,
                                              GATT_UUID_HID_REPORT,
                                              p_char->handle);
            if (p_rpt == NULL) {
                APPL_TRACE_ERROR("%s: Add report entry failed !!!", __func__);
                break;
            }

            if (p_rpt->rpt_type != BTA_HH_RPTT_INPUT)
                break;

            bta_hh_le_read_char_dscrpt(p_dev_cb, p_char->handle, GATT_UUID_RPT_REF_DESCR);
            break;

        /* found boot mode report types */
        case GATT_UUID_HID_BT_KB_OUTPUT:
        case GATT_UUID_HID_BT_MOUSE_INPUT:
        case GATT_UUID_HID_BT_KB_INPUT:
            if (bta_hh_le_find_alloc_report_entry(p_dev_cb,
                                      service->handle,
                                      p_char->uuid.uu.uuid16,
                                      p_char->handle) == NULL)
                APPL_TRACE_ERROR("%s: Add report entry failed !!!", __func__);

            break;

        default:
            APPL_TRACE_DEBUG("%s: not processing %s 0x%04d", __func__,
                             bta_hh_uuid_to_str(p_char->uuid.uu.uuid16),
                             p_char->uuid.uu.uuid16);
        }
    }

    /* Make sure PROTO_MODE is processed as last */
    for (list_node_t *cn = list_begin(service->characteristics);
         cn != list_end(service->characteristics); cn = list_next(cn)) {
        tBTA_GATTC_CHARACTERISTIC *p_char = list_node(cn);

        if(p_char->uuid.len != LEN_UUID_16 &&
           p_char->uuid.uu.uuid16 == GATT_UUID_HID_PROTO_MODE) {
            p_dev_cb->hid_srvc.proto_mode_handle = p_char->handle;
            bta_hh_le_set_protocol_mode(p_dev_cb, p_dev_cb->mode);
            break;
        }
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_srvc_search_cmpl
**
** Description      This function process the GATT service search complete.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_srvc_search_cmpl(tBTA_GATTC_SEARCH_CMPL *p_data)
{
    tBTA_HH_DEV_CB *p_dev_cb = bta_hh_le_find_dev_cb_by_conn_id(p_data->conn_id);

    /* service search exception or no HID service is supported on remote */
    if (p_dev_cb == NULL)
        return;

    if(p_data->status != BTA_GATT_OK)
    {
        p_dev_cb->status = BTA_HH_ERR_SDP;
        /* close the connection and report service discovery complete with error */
        bta_hh_le_api_disc_act(p_dev_cb);
        return;
    }

    const list_t *services = BTA_GATTC_GetServices(p_data->conn_id);

    bool have_hid = false;
    for (list_node_t *sn = list_begin(services);
         sn != list_end(services); sn = list_next(sn)) {
        tBTA_GATTC_SERVICE *service = list_node(sn);

        if (service->uuid.uu.uuid16 == UUID_SERVCLASS_LE_HID &&
            service->is_primary && !have_hid) {
            have_hid = true;

            /* found HID primamry service */
            p_dev_cb->hid_srvc.in_use = TRUE;
            p_dev_cb->hid_srvc.srvc_inst_id = service->handle;
            p_dev_cb->hid_srvc.proto_mode_handle = 0;
            p_dev_cb->hid_srvc.control_point_handle = 0;

            process_included(p_dev_cb, service);
            bta_hh_le_search_hid_chars(p_dev_cb, service);

            APPL_TRACE_DEBUG("%s: have HID service inst_id= %d", __func__, p_dev_cb->hid_srvc.srvc_inst_id);
        } else if (service->uuid.uu.uuid16 == UUID_SERVCLASS_SCAN_PARAM) {
            p_dev_cb->scan_refresh_char_handle = 0;

            for (list_node_t *cn = list_begin(service->characteristics);
                 cn != list_end(service->characteristics); cn = list_next(cn)) {
                tBTA_GATTC_CHARACTERISTIC *p_char = list_node(cn);
                if (p_char->uuid.len == LEN_UUID_16 &&
                    p_char->uuid.uu.uuid16 == GATT_UUID_SCAN_REFRESH) {

                    p_dev_cb->scan_refresh_char_handle = p_char->handle;

                    if (p_char->properties & BTA_GATT_CHAR_PROP_BIT_NOTIFY)
                        p_dev_cb->scps_notify |= BTA_HH_LE_SCPS_NOTIFY_SPT;
                    else
                        p_dev_cb->scps_notify = BTA_HH_LE_SCPS_NOTIFY_NONE;

                    break;
                }
            }
        } else if (service->uuid.uu.uuid16 == UUID_SERVCLASS_GAP_SERVER) {
            //TODO(jpawlowski): this should be done by GAP profile, remove when GAP is fixed.
            for (list_node_t *cn = list_begin(service->characteristics);
                 cn != list_end(service->characteristics); cn = list_next(cn)) {
                tBTA_GATTC_CHARACTERISTIC *p_char = list_node(cn);
                if (p_char->uuid.len == LEN_UUID_16 &&
                    p_char->uuid.uu.uuid16 == GATT_UUID_GAP_PREF_CONN_PARAM) {

                    /* read the char value */
                    gatt_queue_read_op(GATT_READ_CHAR, p_dev_cb->conn_id, p_char->handle);

                    break;
                }
            }
        }
    }

    bta_hh_le_gatt_disc_cmpl(p_dev_cb, p_dev_cb->status);
}

/*******************************************************************************
**
** Function         bta_hh_read_battery_level_cmpl
**
** Description      This function process the battery level read
**
** Parameters:
**
*******************************************************************************/
void bta_hh_read_battery_level_cmpl(UINT8 status, tBTA_HH_DEV_CB *p_dev_cb, tBTA_GATTC_READ *p_data)
{
    UNUSED(status);
    UNUSED(p_data);
    p_dev_cb->hid_srvc.expl_incl_srvc = TRUE;
}


/*******************************************************************************
**
** Function         bta_hh_le_save_rpt_map
**
** Description      save the report map into the control block.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_save_rpt_map(tBTA_HH_DEV_CB *p_dev_cb, tBTA_GATTC_READ *p_data)
{
    tBTA_HH_LE_HID_SRVC *p_srvc = &p_dev_cb->hid_srvc;

    osi_free_and_reset((void **)&p_srvc->rpt_map);

    if (p_data->p_value->len > 0)
        p_srvc->rpt_map = (UINT8 *)osi_malloc(p_data->p_value->len);

    if (p_srvc->rpt_map != NULL)
    {
        UINT8 *pp = p_data->p_value->p_value;
        STREAM_TO_ARRAY(p_srvc->rpt_map, pp, p_data->p_value->len);
        p_srvc->descriptor.dl_len = p_data->p_value->len;
        p_srvc->descriptor.dsc_list = p_dev_cb->hid_srvc.rpt_map;
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_proc_get_rpt_cmpl
**
** Description      Process the Read report complete, send GET_REPORT_EVT to application
**                  with the report data.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_proc_get_rpt_cmpl(tBTA_HH_DEV_CB *p_dev_cb, tBTA_GATTC_READ *p_data)
{
    BT_HDR              *p_buf = NULL;
    tBTA_HH_LE_RPT      *p_rpt;
    tBTA_HH_HSDATA      hs_data;
    UINT8               *pp ;

    if (p_dev_cb->w4_evt != BTA_HH_GET_RPT_EVT)
    {
        APPL_TRACE_ERROR("Unexpected READ cmpl, w4_evt = %d", p_dev_cb->w4_evt);
        return;
    }

    const tBTA_GATTC_CHARACTERISTIC *p_char = BTA_GATTC_GetCharacteristic(p_dev_cb->conn_id,
                                                                          p_data->handle);

    memset(&hs_data, 0, sizeof(hs_data));
    hs_data.status  = BTA_HH_ERR;
    hs_data.handle  = p_dev_cb->hid_handle;

    if (p_data->status == BTA_GATT_OK)
    {
        p_rpt = bta_hh_le_find_report_entry(p_dev_cb,
                                            p_char->service->handle,
                                            p_char->uuid.uu.uuid16,
                                            p_char->handle);

        if (p_rpt != NULL && p_data->p_value != NULL) {
            p_buf = (BT_HDR *)osi_malloc(sizeof(BT_HDR) + p_data->p_value->len + 1);
            /* pack data send to app */
            hs_data.status  = BTA_HH_OK;
            p_buf->len = p_data->p_value->len + 1;
            p_buf->layer_specific = 0;
            p_buf->offset = 0;

            /* attach report ID as the first byte of the report before sending it to USB HID driver */
            pp = (UINT8*)(p_buf + 1);
            UINT8_TO_STREAM(pp, p_rpt->rpt_id);
            memcpy(pp, p_data->p_value->p_value, p_data->p_value->len);

            hs_data.rsp_data.p_rpt_data =p_buf;
        }
    }

    p_dev_cb->w4_evt = 0;
    (* bta_hh_cb.p_cback)(BTA_HH_GET_RPT_EVT, (tBTA_HH *)&hs_data);

    osi_free_and_reset((void **)&p_buf);
}

/*******************************************************************************
**
** Function         bta_hh_le_proc_read_proto_mode
**
** Description      Process the Read protocol mode, send GET_PROTO_EVT to application
**                  with the protocol mode.
**
*******************************************************************************/
void bta_hh_le_proc_read_proto_mode(tBTA_HH_DEV_CB *p_dev_cb, tBTA_GATTC_READ *p_data)
{
    tBTA_HH_HSDATA      hs_data;

    hs_data.status  = BTA_HH_ERR;
    hs_data.handle  = p_dev_cb->hid_handle;
    hs_data.rsp_data.proto_mode = p_dev_cb->mode;

    if (p_data->status == BTA_GATT_OK && p_data->p_value)
    {
        hs_data.status  = BTA_HH_OK;
        /* match up BTE/BTA report/boot mode def*/
        hs_data.rsp_data.proto_mode = *(p_data->p_value->p_value);
        /* LE repot mode is the opposite value of BR/EDR report mode, flip it here */
        if (hs_data.rsp_data.proto_mode == 0)
            hs_data.rsp_data.proto_mode = BTA_HH_PROTO_BOOT_MODE;
        else
            hs_data.rsp_data.proto_mode = BTA_HH_PROTO_RPT_MODE;

        p_dev_cb->mode = hs_data.rsp_data.proto_mode;
    }
#if BTA_HH_DEBUG
    APPL_TRACE_DEBUG("LE GET_PROTOCOL Mode = [%s]",
                        (hs_data.rsp_data.proto_mode == BTA_HH_PROTO_RPT_MODE)? "Report" : "Boot");
#endif

    p_dev_cb->w4_evt = 0;
    (* bta_hh_cb.p_cback)(BTA_HH_GET_PROTO_EVT, (tBTA_HH *)&hs_data);

}

/*******************************************************************************
**
** Function         bta_hh_w4_le_read_char_cmpl
**
** Description      process the GATT read complete in W4_CONN state.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_w4_le_read_char_cmpl(tBTA_HH_DEV_CB *p_dev_cb, tBTA_HH_DATA *p_buf)
{
    tBTA_GATTC_READ     * p_data = (tBTA_GATTC_READ *)p_buf;
    UINT8               *pp ;

    const tBTA_GATTC_CHARACTERISTIC *p_char = BTA_GATTC_GetCharacteristic(p_dev_cb->conn_id,
                                                                          p_data->handle);
    if (p_char == NULL) {
        APPL_TRACE_ERROR("%s: p_char is NULL %d", __func__, p_data->handle);
        return;
    }

    UINT16 char_uuid = p_char->uuid.uu.uuid16;

    if (char_uuid == GATT_UUID_BATTERY_LEVEL)
    {
        bta_hh_read_battery_level_cmpl(p_data->status, p_dev_cb, p_data);
    }
    else if (char_uuid == GATT_UUID_GAP_PREF_CONN_PARAM)
    {
        //TODO(jpawlowski): this should be done by GAP profile, remove when GAP is fixed.
        if (p_data->status != BTA_GATT_OK || p_data->p_value == NULL) {
            APPL_TRACE_ERROR("%s: read pref conn params error: %d",
                             __func__, p_data->status);
            return;
        }

        UINT8 *pp = p_data->p_value->p_value;
        UINT16 min, max, latency, tout;
        STREAM_TO_UINT16 (min, pp);
        STREAM_TO_UINT16 (max, pp);
        STREAM_TO_UINT16 (latency, pp);
        STREAM_TO_UINT16 (tout, pp);

        // Make sure both min, and max are bigger than 11.25ms, lower values can introduce
        // audio issues if A2DP is also active.
        if (min < BTM_BLE_CONN_INT_MIN_LIMIT)
            min = BTM_BLE_CONN_INT_MIN_LIMIT;
        if (max < BTM_BLE_CONN_INT_MIN_LIMIT)
            max = BTM_BLE_CONN_INT_MIN_LIMIT;

        if (tout < BTM_BLE_CONN_TIMEOUT_MIN_DEF)
            tout = BTM_BLE_CONN_TIMEOUT_MIN_DEF;

        BTM_BleSetPrefConnParams (p_dev_cb->addr, min, max, latency, tout);
        L2CA_UpdateBleConnParams(p_dev_cb->addr, min, max, latency, tout);
    }
    else
    {
        if (p_data->status == BTA_GATT_OK && p_data->p_value)
        {
            pp = p_data->p_value->p_value;

            switch (char_uuid)
            {
           /* save device information */
            case GATT_UUID_HID_INFORMATION:
                STREAM_TO_UINT16(p_dev_cb->dscp_info.version, pp);
                STREAM_TO_UINT8(p_dev_cb->dscp_info.ctry_code, pp);
                STREAM_TO_UINT8(p_dev_cb->dscp_info.flag, pp);
                break;

            case GATT_UUID_HID_REPORT_MAP:
                bta_hh_le_save_rpt_map(p_dev_cb, p_data);
                return;

            default:
#if BTA_HH_DEBUG == TRUE
                APPL_TRACE_ERROR("Unexpected read %s(0x%04x)",
                                bta_hh_uuid_to_str(char_uuid), char_uuid);
#endif
                break;
            }
        }
        else
        {
#if BTA_HH_DEBUG == TRUE
            APPL_TRACE_ERROR("read uuid %s[0x%04x] error: %d", bta_hh_uuid_to_str(char_uuid),
                             char_uuid, p_data->status);
#else
            APPL_TRACE_ERROR("read uuid [0x%04x] error: %d", char_uuid, p_data->status);
#endif
        }
    }

}

/*******************************************************************************
**
** Function         bta_hh_le_read_char_cmpl
**
** Description      a characteristic value is received.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_read_char_cmpl (tBTA_HH_DEV_CB *p_dev_cb, tBTA_HH_DATA *p_buf)
{
    tBTA_GATTC_READ * p_data = (tBTA_GATTC_READ *)p_buf;

    const tBTA_GATTC_CHARACTERISTIC *p_char = BTA_GATTC_GetCharacteristic(p_dev_cb->conn_id,
                                                                          p_data->handle);
    if (p_char == NULL) {
        APPL_TRACE_ERROR("%s: p_char is NULL %d", __func__, p_data->handle);
        return;
    }

    UINT16 char_uuid = p_char->uuid.uu.uuid16;

    switch (char_uuid)
    {
    /* GET_REPORT */
    case GATT_UUID_HID_REPORT:
    case GATT_UUID_HID_BT_KB_INPUT:
    case GATT_UUID_HID_BT_KB_OUTPUT:
    case GATT_UUID_HID_BT_MOUSE_INPUT:
    case GATT_UUID_BATTERY_LEVEL: /* read battery level */
        bta_hh_le_proc_get_rpt_cmpl(p_dev_cb, p_data);
        break;

    case GATT_UUID_HID_PROTO_MODE:
        bta_hh_le_proc_read_proto_mode(p_dev_cb, p_data);
        break;

    default:
        APPL_TRACE_ERROR("Unexpected Read UUID: 0x%04x", char_uuid);
        break;
    }

}

/*******************************************************************************
**
** Function         bta_hh_le_read_descr_cmpl
**
** Description      read characteristic descriptor is completed in CONN st.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_read_descr_cmpl(tBTA_HH_DEV_CB *p_dev_cb, tBTA_HH_DATA *p_buf)
{
    tBTA_HH_LE_RPT  *p_rpt;
    tBTA_GATTC_READ * p_data = (tBTA_GATTC_READ *)p_buf;
    UINT8   *pp;

    const tBTA_GATTC_DESCRIPTOR *p_desc = BTA_GATTC_GetDescriptor(p_data->conn_id, p_data->handle);
    if (p_desc == NULL) {
        APPL_TRACE_ERROR("%s: p_descr is NULL %d", __func__, p_data->handle);
        return;
    }

    /* if a report client configuration */
    if (p_desc->uuid.uu.uuid16 == GATT_UUID_CHAR_CLIENT_CONFIG)
    {
        if ((p_rpt = bta_hh_le_find_report_entry(p_dev_cb,
                                                 p_desc->characteristic->service->handle,
                                                 p_desc->characteristic->uuid.uu.uuid16,
                                                 p_desc->characteristic->handle)) != NULL)
        {
            pp = p_data->p_value->p_value;
            STREAM_TO_UINT16(p_rpt->client_cfg_value, pp);

            APPL_TRACE_DEBUG("Read Client Configuration: 0x%04x", p_rpt->client_cfg_value);
        }
    }
}

/*******************************************************************************
**
** Function         bta_hh_w4_le_read_descr_cmpl
**
** Description      read characteristic descriptor is completed in W4_CONN st.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_w4_le_read_descr_cmpl(tBTA_HH_DEV_CB *p_dev_cb, tBTA_HH_DATA *p_buf)
{
    tBTA_HH_LE_RPT  *p_rpt;
    tBTA_GATTC_READ * p_data = (tBTA_GATTC_READ *)p_buf;
    UINT16 char_uuid16;

    if (p_data == NULL)
        return;

    const tBTA_GATTC_DESCRIPTOR *p_desc = BTA_GATTC_GetDescriptor(p_data->conn_id, p_data->handle);
    if (p_desc == NULL) {
        APPL_TRACE_ERROR("%s: p_descr is NULL %d", __func__, p_data->handle);
        return;
    }

    char_uuid16 = p_desc->characteristic->uuid.uu.uuid16;

#if BTA_HH_DEBUG == TRUE
    APPL_TRACE_DEBUG("bta_hh_w4_le_read_descr_cmpl uuid: %s(0x%04x)",
                        bta_hh_uuid_to_str(p_desc->uuid.uu.uuid16),
                        p_desc->uuid.uu.uuid16);
#endif
    switch (char_uuid16)
    {
    case GATT_UUID_HID_REPORT:
        if ((p_rpt = bta_hh_le_find_report_entry(p_dev_cb,
                                            p_desc->characteristic->service->handle,
                                            GATT_UUID_HID_REPORT,
                                            p_desc->characteristic->handle)))
            bta_hh_le_save_rpt_ref(p_dev_cb, p_rpt, p_data);
        break;

    case GATT_UUID_HID_REPORT_MAP:
        bta_hh_le_save_ext_rpt_ref(p_dev_cb, p_data);
        break;

    case GATT_UUID_BATTERY_LEVEL:
        if ((p_rpt = bta_hh_le_find_report_entry(p_dev_cb,
                                            p_desc->characteristic->service->handle,
                                            GATT_UUID_BATTERY_LEVEL,
                                            p_desc->characteristic->handle)))
            bta_hh_le_save_rpt_ref(p_dev_cb, p_rpt, p_data);

        break;

    default:
        APPL_TRACE_ERROR("unknown descriptor read complete for uuid: 0x%04x", char_uuid16);
        break;
    }
}

/*******************************************************************************
**
** Function         bta_hh_w4_le_write_cmpl
**
** Description      Write charactersitic complete event at W4_CONN st.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_w4_le_write_cmpl(tBTA_HH_DEV_CB *p_dev_cb, tBTA_HH_DATA *p_buf)
{
    tBTA_GATTC_WRITE    *p_data = (tBTA_GATTC_WRITE *)p_buf;

    if (p_data == NULL)
        return;

    const tBTA_GATTC_CHARACTERISTIC *p_char = BTA_GATTC_GetCharacteristic(p_dev_cb->conn_id,
                                                                          p_data->handle);

    if (p_char->uuid.uu.uuid16 == GATT_UUID_HID_PROTO_MODE)
    {
        p_dev_cb->status = (p_data->status == BTA_GATT_OK) ? BTA_HH_OK : BTA_HH_ERR_PROTO;

        if ((p_dev_cb->disc_active & BTA_HH_LE_DISC_HIDS) == 0)
            bta_hh_le_open_cmpl(p_dev_cb);
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_write_cmpl
**
** Description      Write charactersitic complete event at CONN st.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_write_cmpl(tBTA_HH_DEV_CB *p_dev_cb, tBTA_HH_DATA *p_buf)
{
    tBTA_GATTC_WRITE    *p_data = (tBTA_GATTC_WRITE *)p_buf;
    tBTA_HH_CBDATA      cback_data ;
    UINT16              cb_evt = p_dev_cb->w4_evt;

    if (p_data == NULL  || cb_evt == 0)
        return;

    const tBTA_GATTC_CHARACTERISTIC *p_char = BTA_GATTC_GetCharacteristic(p_dev_cb->conn_id,
                                                                          p_data->handle);

#if BTA_HH_DEBUG
    APPL_TRACE_DEBUG("bta_hh_le_write_cmpl w4_evt: %d", p_dev_cb->w4_evt);
#endif
    switch (p_char->uuid.uu.uuid16)
    {
    /* Set protocol finished */
    case GATT_UUID_HID_PROTO_MODE:
        cback_data.handle  = p_dev_cb->hid_handle;
        if (p_data->status == BTA_GATT_OK)
        {
            bta_hh_le_register_input_notif(p_dev_cb, p_dev_cb->mode, FALSE);
            cback_data.status = BTA_HH_OK;
        }
        else
            cback_data.status =  BTA_HH_ERR;
        p_dev_cb->w4_evt = 0;
        (* bta_hh_cb.p_cback)(cb_evt, (tBTA_HH *)&cback_data);
        break;

    /* Set Report finished */
    case GATT_UUID_HID_REPORT:
    case GATT_UUID_HID_BT_KB_INPUT:
    case GATT_UUID_HID_BT_MOUSE_INPUT:
    case GATT_UUID_HID_BT_KB_OUTPUT:
        cback_data.handle  = p_dev_cb->hid_handle;
        cback_data.status = (p_data->status == BTA_GATT_OK)? BTA_HH_OK : BTA_HH_ERR;
        p_dev_cb->w4_evt = 0;
        (* bta_hh_cb.p_cback)(cb_evt, (tBTA_HH *)&cback_data);
        break;

    case GATT_UUID_SCAN_INT_WINDOW:
        bta_hh_le_register_scpp_notif(p_dev_cb, p_data->status);
        break;

    default:
        break;
    }

}

/*******************************************************************************
**
** Function         bta_hh_le_write_char_descr_cmpl
**
** Description      Write charactersitic descriptor complete event
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_write_char_descr_cmpl(tBTA_HH_DEV_CB *p_dev_cb, tBTA_HH_DATA *p_buf)
{
    tBTA_GATTC_WRITE    *p_data = (tBTA_GATTC_WRITE *)p_buf;
    UINT8   srvc_inst_id, hid_inst_id;

    const tBTA_GATTC_DESCRIPTOR *p_desc = BTA_GATTC_GetDescriptor(p_dev_cb->conn_id,
                                                                       p_data->handle);

    UINT16 desc_uuid = p_desc->uuid.uu.uuid16;
    UINT16 char_uuid = p_desc->characteristic->uuid.uu.uuid16;
    /* only write client configuration possible */
    if (desc_uuid == GATT_UUID_CHAR_CLIENT_CONFIG)
    {
        srvc_inst_id = p_desc->characteristic->service->handle;
        hid_inst_id = srvc_inst_id;
        switch (char_uuid)
        {
        case GATT_UUID_BATTERY_LEVEL: /* battery level clt cfg registered */
            hid_inst_id = bta_hh_le_find_service_inst_by_battery_inst_id(p_dev_cb, srvc_inst_id);
            /* fall through */
        case GATT_UUID_HID_BT_KB_INPUT:
        case GATT_UUID_HID_BT_MOUSE_INPUT:
        case GATT_UUID_HID_REPORT:
            if (p_data->status == BTA_GATT_OK)
                p_dev_cb->hid_srvc.report[p_dev_cb->clt_cfg_idx].client_cfg_value =
                        BTA_GATT_CLT_CONFIG_NOTIFICATION;
            p_dev_cb->clt_cfg_idx ++;
            bta_hh_le_write_rpt_clt_cfg(p_dev_cb, hid_inst_id);

            break;

        case GATT_UUID_SCAN_REFRESH:
            bta_hh_le_register_scpp_notif_cmpl(p_dev_cb, p_data->status);
            break;

        default:
            APPL_TRACE_ERROR("Unknown char ID clt cfg: 0x%04x", char_uuid);
        }
    }
    else
    {
#if BTA_HH_DEBUG == TRUE
        APPL_TRACE_ERROR("Unexpected write to %s(0x%04x)",
                         bta_hh_uuid_to_str(desc_uuid), desc_uuid);
#else
        APPL_TRACE_ERROR("Unexpected write to (0x%04x)", desc_uuid);
#endif
    }

}

/*******************************************************************************
**
** Function         bta_hh_le_input_rpt_notify
**
** Description      process the notificaton event, most likely for input report.
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_input_rpt_notify(tBTA_GATTC_NOTIFY *p_data)
{
    tBTA_HH_DEV_CB       *p_dev_cb = bta_hh_le_find_dev_cb_by_conn_id(p_data->conn_id);
    UINT8           app_id;
    UINT8           *p_buf;
    tBTA_HH_LE_RPT  *p_rpt;

    if (p_dev_cb == NULL)
    {
        APPL_TRACE_ERROR("%s: notification received from Unknown device, conn_id: 0x%04x",
            __func__, p_data->conn_id);
        return;
    }

    const tBTA_GATTC_CHARACTERISTIC *p_char = BTA_GATTC_GetCharacteristic(p_dev_cb->conn_id,
                                                                          p_data->handle);
    if (p_char == NULL)
    {
        APPL_TRACE_ERROR("%s: notification received for Unknown Characteristic, conn_id: 0x%04x, handle: 0x%04x",
            __func__, p_dev_cb->conn_id, p_data->handle);
        return;
    }

    app_id= p_dev_cb->app_id;

    p_rpt = bta_hh_le_find_report_entry(p_dev_cb,
                                        p_dev_cb->hid_srvc.srvc_inst_id,
                                        p_char->uuid.uu.uuid16,
                                        p_char->handle);
    if (p_rpt == NULL)
    {
        APPL_TRACE_ERROR("%s: notification received for Unknown Report, uuid: 0x%04x, handle: 0x%04x",
            __func__, p_char->uuid.uu.uuid16, p_char->handle);
        return;
    }

    if (p_char->uuid.uu.uuid16 == GATT_UUID_HID_BT_MOUSE_INPUT)
        app_id = BTA_HH_APP_ID_MI;
    else if (p_char->uuid.uu.uuid16 == GATT_UUID_HID_BT_KB_INPUT)
        app_id = BTA_HH_APP_ID_KB;

    APPL_TRACE_DEBUG("Notification received on report ID: %d", p_rpt->rpt_id);

    /* need to append report ID to the head of data */
    if (p_rpt->rpt_id != 0)
    {
        p_buf = (UINT8 *)osi_malloc(p_data->len + 1);

        p_buf[0] = p_rpt->rpt_id;
        memcpy(&p_buf[1], p_data->value, p_data->len);
        ++p_data->len;
    } else {
        p_buf = p_data->value;
    }

    bta_hh_co_data((UINT8)p_dev_cb->hid_handle,
                    p_buf,
                    p_data->len,
                    p_dev_cb->mode,
                    0 , /* no sub class*/
                    p_dev_cb->dscp_info.ctry_code,
                    p_dev_cb->addr,
                    app_id);

    if (p_buf != p_data->value)
        osi_free(p_buf);
}

/*******************************************************************************
**
** Function         bta_hh_gatt_open_fail
**
** Description      action function to process the open fail
**
** Returns          void
**
*******************************************************************************/
void bta_hh_le_open_fail(tBTA_HH_DEV_CB *p_cb, tBTA_HH_DATA *p_data)
{
    tBTA_HH_CONN            conn_dat ;

    /* open failure in the middle of service discovery, clear all services */
    if (p_cb->disc_active & BTA_HH_LE_DISC_HIDS)
    {
        bta_hh_clear_service_cache(p_cb);
    }

    p_cb->disc_active = BTA_HH_LE_DISC_NONE;
    /* Failure in opening connection or GATT discovery failure */
    conn_dat.handle = p_cb->hid_handle;
    memcpy(conn_dat.bda, p_cb->addr, BD_ADDR_LEN);
    conn_dat.le_hid = TRUE;
    conn_dat.scps_supported = p_cb->scps_supported;

    if (p_cb->status == BTA_HH_OK)
        conn_dat.status = (p_data->le_close.reason == BTA_GATT_CONN_UNKNOWN) ? p_cb->status : BTA_HH_ERR;
    else
        conn_dat.status = p_cb->status;

    /* Report OPEN fail event */
    (*bta_hh_cb.p_cback)(BTA_HH_OPEN_EVT, (tBTA_HH *)&conn_dat);

}

/*******************************************************************************
**
** Function         bta_hh_gatt_close
**
** Description      action function to process the GATT close int he state machine.
**
** Returns          void
**
*******************************************************************************/
void bta_hh_gatt_close(tBTA_HH_DEV_CB *p_cb, tBTA_HH_DATA *p_data)
{
    tBTA_HH_CBDATA          disc_dat = {BTA_HH_OK, 0};

    /* deregister all notification */
    bta_hh_le_deregister_input_notif(p_cb);
    /* finaliza device driver */
    bta_hh_co_close(p_cb->hid_handle, p_cb->app_id);
    /* update total conn number */
    bta_hh_cb.cnt_num --;

    disc_dat.handle = p_cb->hid_handle;
    disc_dat.status = p_cb->status;

    (*bta_hh_cb.p_cback)(BTA_HH_CLOSE_EVT, (tBTA_HH *)&disc_dat);

    /* if no connection is active and HH disable is signaled, disable service */
    if (bta_hh_cb.cnt_num == 0 && bta_hh_cb.w4_disable)
    {
        bta_hh_disc_cmpl();
    }
    else
    {
#if (BTA_HH_LE_RECONN == TRUE)
    if (p_data->le_close.reason == BTA_GATT_CONN_TIMEOUT)
    {
        bta_hh_le_add_dev_bg_conn(p_cb, FALSE);
    }
#endif
    }

    return;

}

/*******************************************************************************
**
** Function         bta_hh_le_api_disc_act
**
** Description      initaite a Close API to a remote HID device
**
** Returns          void
**
*******************************************************************************/
void bta_hh_le_api_disc_act(tBTA_HH_DEV_CB *p_cb)
{
    if (p_cb->conn_id != BTA_GATT_INVALID_CONN_ID)
    {
        gatt_op_queue_clean(p_cb->conn_id);
        BTA_GATTC_Close(p_cb->conn_id);
        /* remove device from background connection if intended to disconnect,
           do not allow reconnection */
        bta_hh_le_remove_dev_bg_conn(p_cb);
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_get_rpt
**
** Description      GET_REPORT on a LE HID Report
**
** Returns          void
**
*******************************************************************************/
void bta_hh_le_get_rpt(tBTA_HH_DEV_CB *p_cb, tBTA_HH_RPT_TYPE r_type, UINT8 rpt_id)
{
    tBTA_HH_LE_RPT  *p_rpt = bta_hh_le_find_rpt_by_idtype(p_cb->hid_srvc.report, p_cb->mode, r_type, rpt_id);

    if (p_rpt == NULL) {
        APPL_TRACE_ERROR("%s: no matching report", __func__);
        return;
    }

    p_cb->w4_evt = BTA_HH_GET_RPT_EVT;
    gatt_queue_read_op(GATT_READ_CHAR, p_cb->conn_id, p_rpt->char_inst_id);
}

/*******************************************************************************
**
** Function         bta_hh_le_write_rpt
**
** Description      SET_REPORT/or DATA output on a LE HID Report
**
** Returns          void
**
*******************************************************************************/
void bta_hh_le_write_rpt(tBTA_HH_DEV_CB *p_cb,
                         tBTA_HH_RPT_TYPE r_type,
                         BT_HDR *p_buf, UINT16 w4_evt )
{
    tBTA_HH_LE_RPT  *p_rpt;
    UINT8   *p_value, rpt_id;

    if (p_buf == NULL || p_buf->len == 0)
    {
        APPL_TRACE_ERROR("bta_hh_le_write_rpt: Illegal data");
        return;
    }

    /* strip report ID from the data */
    p_value = (UINT8 *)(p_buf + 1) + p_buf->offset;
    STREAM_TO_UINT8(rpt_id, p_value);
    p_buf->len -= 1;

    p_rpt = bta_hh_le_find_rpt_by_idtype(p_cb->hid_srvc.report, p_cb->mode, r_type, rpt_id);

    if (p_rpt == NULL) {
        APPL_TRACE_ERROR("%s: no matching report", __func__);
        osi_free(p_buf);
        return;
    }

    p_cb->w4_evt = w4_evt;

    const tBTA_GATTC_CHARACTERISTIC *p_char = BTA_GATTC_GetCharacteristic(p_cb->conn_id,
                                                                          p_rpt->char_inst_id);

    tBTA_GATTC_WRITE_TYPE write_type = BTA_GATTC_TYPE_WRITE;
    if (p_char && (p_char->properties & BTA_GATT_CHAR_PROP_BIT_WRITE_NR))
        write_type = BTA_GATTC_TYPE_WRITE_NO_RSP;

    gatt_queue_write_op(GATT_WRITE_CHAR, p_cb->conn_id, p_rpt->char_inst_id,
                        p_buf->len, p_value, write_type);
}

/*******************************************************************************
**
** Function         bta_hh_le_suspend
**
** Description      send LE suspend or exit suspend mode to remote device.
**
** Returns          void
**
*******************************************************************************/
void bta_hh_le_suspend(tBTA_HH_DEV_CB *p_cb, tBTA_HH_TRANS_CTRL_TYPE ctrl_type)
{
    ctrl_type -= BTA_HH_CTRL_SUSPEND;

    gatt_queue_write_op(GATT_WRITE_CHAR, p_cb->conn_id, p_cb->hid_srvc.control_point_handle, 1,
                        &ctrl_type, BTA_GATTC_TYPE_WRITE_NO_RSP);
}

/*******************************************************************************
**
** Function         bta_hh_le_write_dev_act
**
** Description      Write LE device action. can be SET/GET/DATA transaction.
**
** Returns          void
**
*******************************************************************************/
void bta_hh_le_write_dev_act(tBTA_HH_DEV_CB *p_cb, tBTA_HH_DATA *p_data)
{
    switch(p_data->api_sndcmd.t_type)
    {
        case HID_TRANS_SET_PROTOCOL:
            p_cb->w4_evt = BTA_HH_SET_PROTO_EVT;
            bta_hh_le_set_protocol_mode(p_cb, p_data->api_sndcmd.param);
            break;

        case HID_TRANS_GET_PROTOCOL:
            bta_hh_le_get_protocol_mode(p_cb);
            break;

        case HID_TRANS_GET_REPORT:
            bta_hh_le_get_rpt(p_cb,
                              p_data->api_sndcmd.param,
                              p_data->api_sndcmd.rpt_id);
            break;

        case HID_TRANS_SET_REPORT:
            bta_hh_le_write_rpt(p_cb,
                                p_data->api_sndcmd.param,
                                p_data->api_sndcmd.p_data,
                                BTA_HH_SET_RPT_EVT);
            break;

        case HID_TRANS_DATA:  /* output report */

            bta_hh_le_write_rpt(p_cb,
                                p_data->api_sndcmd.param,
                                p_data->api_sndcmd.p_data,
                                BTA_HH_DATA_EVT);
            break;

        case HID_TRANS_CONTROL:
            /* no handshake event will be generated */
            /* if VC_UNPLUG is issued, set flag */
            if (p_data->api_sndcmd.param == BTA_HH_CTRL_SUSPEND ||
                p_data->api_sndcmd.param == BTA_HH_CTRL_EXIT_SUSPEND)
            {
                bta_hh_le_suspend(p_cb, p_data->api_sndcmd.param);
            }
            break;

        default:
            APPL_TRACE_ERROR("%s unsupported transaction for BLE HID device: %d",
                __func__, p_data->api_sndcmd.t_type);
            break;
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_get_dscp_act
**
** Description      Send ReportDescriptor to application for all HID services.
**
** Returns          void
**
*******************************************************************************/
void bta_hh_le_get_dscp_act(tBTA_HH_DEV_CB *p_cb)
{
    if (p_cb->hid_srvc.in_use)
    {
        p_cb->dscp_info.descriptor.dl_len = p_cb->hid_srvc.descriptor.dl_len;
        p_cb->dscp_info.descriptor.dsc_list = p_cb->hid_srvc.descriptor.dsc_list;

        (*bta_hh_cb.p_cback)(BTA_HH_GET_DSCP_EVT, (tBTA_HH *)&p_cb->dscp_info);
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_add_dev_bg_conn
**
** Description      Remove a LE HID device from back ground connection procedure.
**
** Returns          void
**
*******************************************************************************/
static void bta_hh_le_add_dev_bg_conn(tBTA_HH_DEV_CB *p_cb, BOOLEAN check_bond)
{
    UINT8           sec_flag=0;
    BOOLEAN         to_add = TRUE;

    if (check_bond)
    {
        /* start reconnection if remote is a bonded device */
        /* verify bond */
        BTM_GetSecurityFlagsByTransport(p_cb->addr, &sec_flag, BT_TRANSPORT_LE);

        if ((sec_flag & BTM_SEC_FLAG_LKEY_KNOWN) == 0)
            to_add = FALSE;
    }

    if (/*p_cb->dscp_info.flag & BTA_HH_LE_NORMAL_CONN &&*/
        !p_cb->in_bg_conn && to_add)
    {
        /* add device into BG connection to accept remote initiated connection */
        BTA_GATTC_Open(bta_hh_cb.gatt_if, p_cb->addr, FALSE, BTA_GATT_TRANSPORT_LE);
        p_cb->in_bg_conn = TRUE;

        BTA_DmBleSetBgConnType(BTA_DM_BLE_CONN_AUTO, NULL);
    }
    return;
}

/*******************************************************************************
**
** Function         bta_hh_le_add_device
**
** Description      Add a LE HID device as a known device, and also add the address
**                  into back ground connection WL for incoming connection.
**
** Returns          void
**
*******************************************************************************/
UINT8 bta_hh_le_add_device(tBTA_HH_DEV_CB *p_cb, tBTA_HH_MAINT_DEV *p_dev_info)
{
    p_cb->hid_handle = BTA_HH_GET_LE_DEV_HDL(p_cb->index);
    bta_hh_cb.le_cb_index[BTA_HH_GET_LE_CB_IDX(p_cb->hid_handle)] = p_cb->index;

    /* update DI information */
    bta_hh_update_di_info(p_cb,
                          p_dev_info->dscp_info.vendor_id,
                          p_dev_info->dscp_info.product_id,
                          p_dev_info->dscp_info.version,
                          p_dev_info->dscp_info.flag);

    /* add to BTA device list */
    bta_hh_add_device_to_list(p_cb, p_cb->hid_handle,
                              p_dev_info->attr_mask,
                              &p_dev_info->dscp_info.descriptor,
                              p_dev_info->sub_class,
                              p_dev_info->dscp_info.ssr_max_latency,
                              p_dev_info->dscp_info.ssr_min_tout,
                              p_dev_info->app_id);

    bta_hh_le_add_dev_bg_conn(p_cb, FALSE);

    return p_cb->hid_handle;
}

/*******************************************************************************
**
** Function         bta_hh_le_remove_dev_bg_conn
**
** Description      Remove a LE HID device from back ground connection procedure.
**
** Returns          void
**
*******************************************************************************/
void bta_hh_le_remove_dev_bg_conn(tBTA_HH_DEV_CB *p_dev_cb)
{
    if (p_dev_cb->in_bg_conn)
    {
        p_dev_cb->in_bg_conn = FALSE;

        BTA_GATTC_CancelOpen(bta_hh_cb.gatt_if, p_dev_cb->addr, FALSE);
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_update_scpp
**
** Description      action function to update the scan parameters on remote HID
**                  device
**
** Parameters:
**
*******************************************************************************/
void bta_hh_le_update_scpp(tBTA_HH_DEV_CB *p_dev_cb, tBTA_HH_DATA *p_buf)
{
    UINT8   value[4], *p = value;
    tBTA_HH_CBDATA      cback_data;

    if (!p_dev_cb->is_le_device ||
        p_dev_cb->mode != BTA_HH_PROTO_RPT_MODE ||
        p_dev_cb->scps_supported == FALSE) {
        APPL_TRACE_ERROR("Can not set ScPP scan paramter as boot host, or remote does not support ScPP ");

        cback_data.handle = p_dev_cb->hid_handle;
        cback_data.status = BTA_HH_ERR;
        (* bta_hh_cb.p_cback)(BTA_HH_UPDATE_SCPP_EVT, (tBTA_HH *)&cback_data);

        return;
    }

    p_dev_cb->w4_evt = BTA_HH_UPDATE_SCPP_EVT;

    UINT16_TO_STREAM(p, p_buf->le_scpp_update.scan_int);
    UINT16_TO_STREAM(p, p_buf->le_scpp_update.scan_win);

    gatt_queue_write_op(GATT_WRITE_CHAR, p_dev_cb->conn_id, p_dev_cb->scan_refresh_char_handle, 2,
                        value, BTA_GATTC_TYPE_WRITE_NO_RSP);
}

/*******************************************************************************
**
** Function         bta_hh_gattc_callback
**
** Description      This is GATT client callback function used in BTA HH.
**
** Parameters:
**
*******************************************************************************/
static void bta_hh_gattc_callback(tBTA_GATTC_EVT event, tBTA_GATTC *p_data)
{
    tBTA_HH_DEV_CB *p_dev_cb;
    UINT16          evt;
#if BTA_HH_DEBUG
    APPL_TRACE_DEBUG("bta_hh_gattc_callback event = %d", event);
#endif
    if (p_data == NULL)
        return;

    switch (event)
    {
        case BTA_GATTC_REG_EVT: /* 0 */
            bta_hh_le_register_cmpl(&p_data->reg_oper);
            break;

        case BTA_GATTC_DEREG_EVT: /* 1 */
            bta_hh_cleanup_disable(p_data->reg_oper.status);
            break;

        case BTA_GATTC_OPEN_EVT: /* 2 */
            p_dev_cb = bta_hh_le_find_dev_cb_by_bda(p_data->open.remote_bda);
            if (p_dev_cb) {
                bta_hh_sm_execute(p_dev_cb, BTA_HH_GATT_OPEN_EVT, (tBTA_HH_DATA *)&p_data->open);
            }
            break;

        case BTA_GATTC_READ_CHAR_EVT: /* 3 */
        case BTA_GATTC_READ_DESCR_EVT: /* 8 */
            mark_as_not_executing(p_data->read.conn_id);
            gatt_execute_next_op(p_data->read.conn_id);
            p_dev_cb = bta_hh_le_find_dev_cb_by_conn_id(p_data->read.conn_id);
            if (event == BTA_GATTC_READ_CHAR_EVT)
                evt = BTA_HH_GATT_READ_CHAR_CMPL_EVT;
            else
                evt = BTA_HH_GATT_READ_DESCR_CMPL_EVT;

            bta_hh_sm_execute(p_dev_cb, evt, (tBTA_HH_DATA *)&p_data->read);
            break;

        case BTA_GATTC_WRITE_DESCR_EVT: /* 9 */
        case BTA_GATTC_WRITE_CHAR_EVT: /* 4 */
            mark_as_not_executing(p_data->write.conn_id);
            gatt_execute_next_op(p_data->write.conn_id);
            p_dev_cb = bta_hh_le_find_dev_cb_by_conn_id(p_data->write.conn_id);
            if (event == BTA_GATTC_WRITE_CHAR_EVT)
                evt = BTA_HH_GATT_WRITE_CHAR_CMPL_EVT;
            else
                evt = BTA_HH_GATT_WRITE_DESCR_CMPL_EVT;

            bta_hh_sm_execute(p_dev_cb, evt, (tBTA_HH_DATA *)&p_data->write);
            break;

        case BTA_GATTC_CLOSE_EVT: /* 5 */
            bta_hh_le_close(&p_data->close);
            break;

        case BTA_GATTC_SEARCH_CMPL_EVT: /* 6 */
            bta_hh_le_srvc_search_cmpl(&p_data->search_cmpl);
            break;

        case BTA_GATTC_NOTIF_EVT: /* 10 */
            bta_hh_le_input_rpt_notify(&p_data->notify);
            break;

        case BTA_GATTC_ENC_CMPL_CB_EVT: /* 17 */
            p_dev_cb = bta_hh_le_find_dev_cb_by_bda(p_data->enc_cmpl.remote_bda);
            if (p_dev_cb) {
                bta_hh_sm_execute(p_dev_cb, BTA_HH_GATT_ENC_CMPL_EVT,
                              (tBTA_HH_DATA *)&p_data->enc_cmpl);
            }
            break;

        default:
            break;
    }
}

/*******************************************************************************
**
** Function         bta_hh_le_hid_read_rpt_clt_cfg
**
** Description      a test command to read report descriptor client configuration
**
** Returns          void
**
*******************************************************************************/
void bta_hh_le_hid_read_rpt_clt_cfg(BD_ADDR bd_addr, UINT8 rpt_id)
{
    tBTA_HH_DEV_CB *p_cb = NULL;
    tBTA_HH_LE_RPT *p_rpt ;
    UINT8           index = BTA_HH_IDX_INVALID;

    index = bta_hh_find_cb(bd_addr);
    if ((index = bta_hh_find_cb(bd_addr))== BTA_HH_IDX_INVALID)
    {
        APPL_TRACE_ERROR("unknown device");
        return;
    }

    p_cb = &bta_hh_cb.kdev[index];

    p_rpt = bta_hh_le_find_rpt_by_idtype(p_cb->hid_srvc.report, p_cb->mode, BTA_HH_RPTT_INPUT, rpt_id);

    if (p_rpt == NULL)
    {
        APPL_TRACE_ERROR("bta_hh_le_write_rpt: no matching report");
        return;
    }

    bta_hh_le_read_char_dscrpt(p_cb, p_rpt->char_inst_id, GATT_UUID_CHAR_CLIENT_CONFIG);
    return;
}

/*******************************************************************************
**
** Function         bta_hh_le_register_scpp_notif
**
** Description      register scan parameter refresh notitication complete
**
**
** Parameters:
**
*******************************************************************************/
static void bta_hh_le_register_scpp_notif(tBTA_HH_DEV_CB *p_dev_cb, tBTA_GATT_STATUS status)
{
    UINT8               sec_flag=0;

    /* if write scan parameter sucessful */
    /* if bonded and notification is not enabled, configure the client configuration */
    if (status == BTA_GATT_OK &&
        (p_dev_cb->scps_notify & BTA_HH_LE_SCPS_NOTIFY_SPT) != 0 &&
        (p_dev_cb->scps_notify & BTA_HH_LE_SCPS_NOTIFY_ENB) == 0)
    {
        BTM_GetSecurityFlagsByTransport(p_dev_cb->addr, &sec_flag, BT_TRANSPORT_LE);
        if ((sec_flag & BTM_SEC_FLAG_LKEY_KNOWN))
        {
            if (bta_hh_le_write_char_clt_cfg (p_dev_cb, p_dev_cb->scan_refresh_char_handle,
                                              BTA_GATT_CLT_CONFIG_NOTIFICATION))
            {
                BTA_GATTC_RegisterForNotifications(bta_hh_cb.gatt_if, p_dev_cb->addr,
                                                   p_dev_cb->scan_refresh_char_handle);
                return;
            }
        }
    }
    bta_hh_le_register_scpp_notif_cmpl(p_dev_cb, status);
}

/*******************************************************************************
**
** Function         bta_hh_le_register_scpp_notif_cmpl
**
** Description      action function to register scan parameter refresh notitication
**
** Parameters:
**
*******************************************************************************/
static void bta_hh_le_register_scpp_notif_cmpl(tBTA_HH_DEV_CB *p_dev_cb, tBTA_GATT_STATUS status)
{
    tBTA_HH_CBDATA      cback_data ;
    UINT16              cb_evt = p_dev_cb->w4_evt;

    if (status == BTA_GATT_OK)
        p_dev_cb->scps_notify = (BTA_HH_LE_SCPS_NOTIFY_ENB | BTA_HH_LE_SCPS_NOTIFY_SPT);

    cback_data.handle = p_dev_cb->hid_handle;
    cback_data.status = (status == BTA_GATT_OK)? BTA_HH_OK : BTA_HH_ERR;
    p_dev_cb->w4_evt = 0;
    (* bta_hh_cb.p_cback)(cb_evt, (tBTA_HH *)&cback_data);
}

/*******************************************************************************
**
** Function         bta_hh_process_cache_rpt
**
** Description      Process the cached reports
**
** Parameters:
**
*******************************************************************************/
//TODO(jpawlowski): uncomment when fixed
// static void bta_hh_process_cache_rpt (tBTA_HH_DEV_CB *p_cb,
//                                       tBTA_HH_RPT_CACHE_ENTRY *p_rpt_cache,
//                                       UINT8 num_rpt)
// {
//     UINT8                       i = 0;
//     tBTA_HH_LE_RPT              *p_rpt;

//     if (num_rpt != 0)  /* no cache is found */
//     {
//         p_cb->hid_srvc.in_use = TRUE;

//         /* set the descriptor info */
//         p_cb->hid_srvc.descriptor.dl_len =
//                 p_cb->dscp_info.descriptor.dl_len;
//         p_cb->hid_srvc.descriptor.dsc_list =
//                     p_cb->dscp_info.descriptor.dsc_list;

//         for (; i <num_rpt; i ++, p_rpt_cache ++)
//         {
//             if ((p_rpt = bta_hh_le_find_alloc_report_entry (p_cb,
//                                                p_rpt_cache->srvc_inst_id,
//                                                p_rpt_cache->rpt_uuid,
//                                                p_rpt_cache->char_inst_id,
//                                                p_rpt_cache->prop))  == NULL)
//             {
//                 APPL_TRACE_ERROR("bta_hh_process_cache_rpt: allocation report entry failure");
//                 break;
//             }
//             else
//             {
//                 p_rpt->rpt_type =  p_rpt_cache->rpt_type;
//                 p_rpt->rpt_id   =  p_rpt_cache->rpt_id;

//                 if(p_rpt->uuid == GATT_UUID_HID_BT_KB_INPUT ||
//                     p_rpt->uuid == GATT_UUID_HID_BT_MOUSE_INPUT ||
//                     (p_rpt->uuid == GATT_UUID_HID_REPORT && p_rpt->rpt_type == BTA_HH_RPTT_INPUT))
//                 {
//                     p_rpt->client_cfg_value = BTA_GATT_CLT_CONFIG_NOTIFICATION;
//                 }
//             }
//         }
//     }
// }

#endif




