/******************************************************************************
 *
 *  Copyright (C) 1999-2012 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.
 *
 ******************************************************************************/

/******************************************************************************
 *
 *  This file contains the main Bluetooth Upper Layer processing loop.
 *  The Broadcom implementations of L2CAP RFCOMM, SDP and the BTIf run as one
 *  GKI task. This btu_task switches between them.
 *
 *  Note that there will always be an L2CAP, but there may or may not be an
 *  RFCOMM or SDP. Whether these layers are present or not is determined by
 *  compile switches.
 *
 ******************************************************************************/

#include <stdlib.h>
#include <string.h>
#include <stdio.h>

#include "bt_target.h"
#include "gki.h"
#include "bt_types.h"
#include "hcimsgs.h"
#include "l2c_int.h"
#include "btu.h"
#include "bt_utils.h"

#include "sdpint.h"

#if ( defined(RFCOMM_INCLUDED) && RFCOMM_INCLUDED == TRUE )
#include "port_api.h"
#include "port_ext.h"
#endif

#include "btm_api.h"
#include "btm_int.h"

#if (defined(EVAL) && EVAL == TRUE)
#include "btu_eval.h"
#endif

#if GAP_INCLUDED == TRUE
#include "gap_int.h"
#endif

#if (defined(OBX_INCLUDED) && OBX_INCLUDED == TRUE)
#include "obx_int.h"

#if (defined(BIP_INCLUDED) && BIP_INCLUDED == TRUE)
#include "bip_int.h"
#endif /* BIP */

#if (BPP_SND_INCLUDED == TRUE ||  BPP_INCLUDED == TRUE)
#include "bpp_int.h"
#endif /* BPP */

#endif /* OBX */

#include "bt_trace.h"

/* BTE application task */
#if APPL_INCLUDED == TRUE
#include "bte_appl.h"
#endif

#if (defined(RPC_INCLUDED) && RPC_INCLUDED == TRUE)
#include "rpct_main.h"
#endif

#if (defined(BNEP_INCLUDED) && BNEP_INCLUDED == TRUE)
#include "bnep_int.h"
#endif

#if (defined(PAN_INCLUDED) && PAN_INCLUDED == TRUE)
#include "pan_int.h"
#endif

#if (defined(SAP_SERVER_INCLUDED) && SAP_SERVER_INCLUDED == TRUE)
#include "sap_int.h"
#endif

#if (defined(HID_DEV_INCLUDED) && HID_DEV_INCLUDED == TRUE )
#include "hidd_int.h"
#endif

#if (defined(HID_HOST_INCLUDED) && HID_HOST_INCLUDED == TRUE )
#include "hidh_int.h"
#endif

#if (defined(AVDT_INCLUDED) && AVDT_INCLUDED == TRUE)
#include "avdt_int.h"
#else
extern void avdt_rcv_sync_info (BT_HDR *p_buf); /* this is for hci_test */
#endif

#if (defined(MCA_INCLUDED) && MCA_INCLUDED == TRUE)
#include "mca_api.h"
#include "mca_defs.h"
#include "mca_int.h"
#endif


#if (defined(BTU_BTA_INCLUDED) && BTU_BTA_INCLUDED == TRUE)
#include "bta_sys.h"
#endif

#if (BLE_INCLUDED == TRUE)
#include "gatt_int.h"
#if (SMP_INCLUDED == TRUE)
#include "smp_int.h"
#endif
#include "btm_ble_int.h"
#endif

#ifdef __cplusplus
extern "C"
{
#endif

BT_API extern void BTE_InitStack(void);

#ifdef __cplusplus
}
#endif

/* Define BTU storage area
*/
#if BTU_DYNAMIC_MEMORY == FALSE
tBTU_CB  btu_cb;
#endif


/* Define a function prototype to allow a generic timeout handler */
typedef void (tUSER_TIMEOUT_FUNC) (TIMER_LIST_ENT *p_tle);

/*******************************************************************************
**
** Function         btu_task
**
** Description      This is the main task of the Bluetooth Upper Layers unit.
**                  It sits in a loop waiting for messages, and dispatches them
**                  to the appropiate handlers.
**
** Returns          should never return
**
*******************************************************************************/
BTU_API UINT32 btu_task (UINT32 param)
{
    UINT16           event;
    BT_HDR          *p_msg;
    UINT8            i;
    UINT16           mask;
    BOOLEAN          handled;
    UNUSED(param);

#if (defined(HCISU_H4_INCLUDED) && HCISU_H4_INCLUDED == TRUE)
    /* wait an event that HCISU is ready */
    BT_TRACE(TRACE_LAYER_BTU, TRACE_TYPE_API,
                "btu_task pending for preload complete event");

    for (;;)
    {
        event = GKI_wait (0xFFFF, 0);
        if (event & EVENT_MASK(GKI_SHUTDOWN_EVT))
        {
            /* indicates BT ENABLE abort */
            BT_TRACE(TRACE_LAYER_BTU, TRACE_TYPE_WARNING,
                        "btu_task start abort!");
            return (0);
        }
        else if (event & BT_EVT_PRELOAD_CMPL)
        {
            break;
        }
        else
        {
            BT_TRACE(TRACE_LAYER_BTU, TRACE_TYPE_WARNING,
                "btu_task ignore evt %04x while pending for preload complete",
                event);
        }
    }

    BT_TRACE(TRACE_LAYER_BTU, TRACE_TYPE_API,
                "btu_task received preload complete event");
#endif

    /* Initialize the mandatory core stack control blocks
       (BTU, BTM, L2CAP, and SDP)
     */
    btu_init_core();

    /* Initialize any optional stack components */
    BTE_InitStack();

#if (defined(BTU_BTA_INCLUDED) && BTU_BTA_INCLUDED == TRUE)
    bta_sys_init();
#endif

    /* Initialise platform trace levels at this point as BTE_InitStack() and bta_sys_init()
     * reset the control blocks and preset the trace level with XXX_INITIAL_TRACE_LEVEL
     */
#if ( BT_USE_TRACES==TRUE )
    BTE_InitTraceLevels();
#endif

    /* Send a startup evt message to BTIF_TASK to kickstart the init procedure */
    GKI_send_event(BTIF_TASK, BT_EVT_TRIGGER_STACK_INIT);

    raise_priority_a2dp(TASK_HIGH_BTU);

    /* Wait for, and process, events */
    for (;;)
    {
        event = GKI_wait (0xFFFF, 0);

        if (event & TASK_MBOX_0_EVT_MASK)
        {
            /* Process all messages in the queue */
            while ((p_msg = (BT_HDR *) GKI_read_mbox (BTU_HCI_RCV_MBOX)) != NULL)
            {
                /* Determine the input message type. */
                switch (p_msg->event & BT_EVT_MASK)
                {
                    case BT_EVT_TO_BTU_HCI_ACL:
                        /* All Acl Data goes to L2CAP */
                        l2c_rcv_acl_data (p_msg);
                        break;

                    case BT_EVT_TO_BTU_L2C_SEG_XMIT:
                        /* L2CAP segment transmit complete */
                        l2c_link_segments_xmitted (p_msg);
                        break;

                    case BT_EVT_TO_BTU_HCI_SCO:
#if BTM_SCO_INCLUDED == TRUE
                        btm_route_sco_data (p_msg);
                        break;
#endif

                    case BT_EVT_TO_BTU_HCI_EVT:
                        btu_hcif_process_event ((UINT8)(p_msg->event & BT_SUB_EVT_MASK), p_msg);
                        GKI_freebuf(p_msg);

#if (defined(HCILP_INCLUDED) && HCILP_INCLUDED == TRUE)
                        /* If host receives events which it doesn't response to, */
                        /* host should start idle timer to enter sleep mode.     */
                        btu_check_bt_sleep ();
#endif
                        break;

                    case BT_EVT_TO_BTU_HCI_CMD:
                        btu_hcif_send_cmd ((UINT8)(p_msg->event & BT_SUB_EVT_MASK), p_msg);
                        break;

#if (defined(OBX_INCLUDED) && OBX_INCLUDED == TRUE)
#if (defined(OBX_SERVER_INCLUDED) && OBX_SERVER_INCLUDED == TRUE)
                    case BT_EVT_TO_OBX_SR_MSG:
                        obx_sr_proc_evt((tOBX_PORT_EVT *)(p_msg + 1));
                        GKI_freebuf (p_msg);
                        break;

                    case BT_EVT_TO_OBX_SR_L2C_MSG:
                        obx_sr_proc_l2c_evt((tOBX_L2C_EVT_MSG *)(p_msg + 1));
                        GKI_freebuf (p_msg);
                        break;
#endif

#if (defined(OBX_CLIENT_INCLUDED) && OBX_CLIENT_INCLUDED == TRUE)
                    case BT_EVT_TO_OBX_CL_MSG:
                        obx_cl_proc_evt((tOBX_PORT_EVT *)(p_msg + 1));
                        GKI_freebuf (p_msg);
                        break;

                    case BT_EVT_TO_OBX_CL_L2C_MSG:
                        obx_cl_proc_l2c_evt((tOBX_L2C_EVT_MSG *)(p_msg + 1));
                        GKI_freebuf (p_msg);
                        break;
#endif

#if (defined(BIP_INCLUDED) && BIP_INCLUDED == TRUE)
                    case BT_EVT_TO_BIP_CMDS :
                        bip_proc_btu_event(p_msg);
                        GKI_freebuf (p_msg);
                        break;
#endif /* BIP */
#if (BPP_SND_INCLUDED == TRUE || BPP_INCLUDED == TRUE)
                    case BT_EVT_TO_BPP_PR_CMDS:
                        bpp_pr_proc_event(p_msg);
                        GKI_freebuf (p_msg);
                        break;
                    case BT_EVT_TO_BPP_SND_CMDS:
                        bpp_snd_proc_event(p_msg);
                        GKI_freebuf (p_msg);
                        break;

#endif /* BPP */

#endif /* OBX */

#if (defined(SAP_SERVER_INCLUDED) && SAP_SERVER_INCLUDED == TRUE)
                    case BT_EVT_TO_BTU_SAP :
                        sap_proc_btu_event(p_msg);
                        GKI_freebuf (p_msg);
                        break;
#endif /* SAP */
#if (defined(GAP_CONN_INCLUDED) && GAP_CONN_INCLUDED == TRUE && GAP_CONN_POST_EVT_INCLUDED == TRUE)
                    case BT_EVT_TO_GAP_MSG :
                        gap_proc_btu_event(p_msg);
                        GKI_freebuf (p_msg);
                        break;
#endif
                    case BT_EVT_TO_START_TIMER :
                        /* Start free running 1 second timer for list management */
                        GKI_start_timer (TIMER_0, GKI_SECS_TO_TICKS (1), TRUE);
                        GKI_freebuf (p_msg);
                        break;

                    case BT_EVT_TO_STOP_TIMER:
                        if (GKI_timer_queue_is_empty(&btu_cb.timer_queue)) {
                            GKI_stop_timer(TIMER_0);
                        }
                        GKI_freebuf (p_msg);
                        break;

                    case BT_EVT_TO_START_TIMER_ONESHOT:
                        if (!GKI_timer_queue_is_empty(&btu_cb.timer_queue_oneshot)) {
                            TIMER_LIST_ENT *tle = GKI_timer_getfirst(&btu_cb.timer_queue_oneshot);
                            // Start non-repeating timer.
                            GKI_start_timer(TIMER_3, tle->ticks, FALSE);
                        } else {
                            BTM_TRACE_WARNING("Oneshot timer queue empty when received start request");
                        }
                        GKI_freebuf(p_msg);
                        break;

                    case BT_EVT_TO_STOP_TIMER_ONESHOT:
                        if (GKI_timer_queue_is_empty(&btu_cb.timer_queue_oneshot)) {
                            GKI_stop_timer(TIMER_3);
                        } else {
                            BTM_TRACE_WARNING("Oneshot timer queue not empty when received stop request");
                        }
                        GKI_freebuf (p_msg);
                        break;

#if defined(QUICK_TIMER_TICKS_PER_SEC) && (QUICK_TIMER_TICKS_PER_SEC > 0)
                    case BT_EVT_TO_START_QUICK_TIMER :
                        GKI_start_timer (TIMER_2, QUICK_TIMER_TICKS, TRUE);
                        GKI_freebuf (p_msg);
                        break;
#endif

                    default:
                        i = 0;
                        mask = (UINT16) (p_msg->event & BT_EVT_MASK);
                        handled = FALSE;

                        for (; !handled && i < BTU_MAX_REG_EVENT; i++)
                        {
                            if (btu_cb.event_reg[i].event_cb == NULL)
                                continue;

                            if (mask == btu_cb.event_reg[i].event_range)
                            {
                                if (btu_cb.event_reg[i].event_cb)
                                {
                                    btu_cb.event_reg[i].event_cb(p_msg);
                                    handled = TRUE;
                                }
                            }
                        }

                        if (handled == FALSE)
                            GKI_freebuf (p_msg);

                        break;
                }
            }
        }


        if (event & TIMER_0_EVT_MASK) {
            GKI_update_timer_list (&btu_cb.timer_queue, 1);

            while (!GKI_timer_queue_is_empty(&btu_cb.timer_queue)) {
                TIMER_LIST_ENT *p_tle = GKI_timer_getfirst(&btu_cb.timer_queue);
                if (p_tle->ticks != 0)
                    break;

                GKI_remove_from_timer_list(&btu_cb.timer_queue, p_tle);

                switch (p_tle->event) {
                    case BTU_TTYPE_BTM_DEV_CTL:
                        btm_dev_timeout(p_tle);
                        break;

                    case BTU_TTYPE_BTM_ACL:
                        btm_acl_timeout(p_tle);
                        break;

                    case BTU_TTYPE_L2CAP_LINK:
                    case BTU_TTYPE_L2CAP_CHNL:
                    case BTU_TTYPE_L2CAP_HOLD:
                    case BTU_TTYPE_L2CAP_INFO:
                    case BTU_TTYPE_L2CAP_FCR_ACK:
#if (BLE_INCLUDED == TRUE)
                    case BTU_TTYPE_L2CAP_END_CONN_UPD:
#endif

                        l2c_process_timeout (p_tle);
                        break;

                    case BTU_TTYPE_SDP:
                        sdp_conn_timeout ((tCONN_CB *)p_tle->param);
                        break;

                    case BTU_TTYPE_BTM_RMT_NAME:
                        btm_inq_rmt_name_failed();
                        break;

#if (defined(RFCOMM_INCLUDED) && RFCOMM_INCLUDED == TRUE)
                    case BTU_TTYPE_RFCOMM_MFC:
                    case BTU_TTYPE_RFCOMM_PORT:
                        rfcomm_process_timeout (p_tle);
                        break;

#endif /* If defined(RFCOMM_INCLUDED) && RFCOMM_INCLUDED == TRUE */

#if ((defined(BNEP_INCLUDED) && BNEP_INCLUDED == TRUE))
                    case BTU_TTYPE_BNEP:
                        bnep_process_timeout(p_tle);
                        break;
#endif


#if (defined(AVDT_INCLUDED) && AVDT_INCLUDED == TRUE)
                    case BTU_TTYPE_AVDT_CCB_RET:
                    case BTU_TTYPE_AVDT_CCB_RSP:
                    case BTU_TTYPE_AVDT_CCB_IDLE:
                    case BTU_TTYPE_AVDT_SCB_TC:
                        avdt_process_timeout(p_tle);
                        break;
#endif

#if (defined(OBX_INCLUDED) && OBX_INCLUDED == TRUE)
#if (defined(OBX_CLIENT_INCLUDED) && OBX_CLIENT_INCLUDED == TRUE)
                    case BTU_TTYPE_OBX_CLIENT_TO:
                        obx_cl_timeout(p_tle);
                        break;
#endif
#if (defined(OBX_SERVER_INCLUDED) && OBX_SERVER_INCLUDED == TRUE)
                    case BTU_TTYPE_OBX_SERVER_TO:
                        obx_sr_timeout(p_tle);
                        break;

                    case BTU_TTYPE_OBX_SVR_SESS_TO:
                        obx_sr_sess_timeout(p_tle);
                        break;
#endif
#endif

#if (defined(SAP_SERVER_INCLUDED) && SAP_SERVER_INCLUDED == TRUE)
                    case BTU_TTYPE_SAP_TO:
                        sap_process_timeout(p_tle);
                        break;
#endif

                    case BTU_TTYPE_BTU_CMD_CMPL:
                        btu_hcif_cmd_timeout((UINT8)(p_tle->event - BTU_TTYPE_BTU_CMD_CMPL));
                        break;

#if (defined(HID_HOST_INCLUDED) && HID_HOST_INCLUDED == TRUE)
                    case BTU_TTYPE_HID_HOST_REPAGE_TO :
                        hidh_proc_repage_timeout(p_tle);
                        break;
#endif

#if (defined(BLE_INCLUDED) && BLE_INCLUDED == TRUE)
                    case BTU_TTYPE_BLE_INQUIRY:
                    case BTU_TTYPE_BLE_GAP_LIM_DISC:
                    case BTU_TTYPE_BLE_GAP_FAST_ADV:
                    case BTU_TTYPE_BLE_OBSERVE:
                        btm_ble_timeout(p_tle);
                        break;

                    case BTU_TTYPE_ATT_WAIT_FOR_RSP:
                        gatt_rsp_timeout(p_tle);
                        break;

                    case BTU_TTYPE_ATT_WAIT_FOR_IND_ACK:
                        gatt_ind_ack_timeout(p_tle);
                        break;
#if (defined(SMP_INCLUDED) && SMP_INCLUDED == TRUE)
                    case BTU_TTYPE_SMP_PAIRING_CMD:
                        smp_rsp_timeout(p_tle);
                        break;
#endif

#endif

#if (MCA_INCLUDED == TRUE)
                    case BTU_TTYPE_MCA_CCB_RSP:
                        mca_process_timeout(p_tle);
                        break;
#endif
                    case BTU_TTYPE_USER_FUNC:
                        {
                            tUSER_TIMEOUT_FUNC  *p_uf = (tUSER_TIMEOUT_FUNC *)p_tle->param;
                            (*p_uf)(p_tle);
                        }
                        break;

                    default:
                        i = 0;
                        handled = FALSE;

                        for (; !handled && i < BTU_MAX_REG_TIMER; i++)
                        {
                            if (btu_cb.timer_reg[i].timer_cb == NULL)
                                continue;
                            if (btu_cb.timer_reg[i].p_tle == p_tle)
                            {
                                btu_cb.timer_reg[i].timer_cb(p_tle);
                                handled = TRUE;
                            }
                        }
                        break;
                }
            }

            /* if timer list is empty stop periodic GKI timer */
            if (btu_cb.timer_queue.p_first == NULL)
            {
                GKI_stop_timer(TIMER_0);
            }
        }

#if defined(QUICK_TIMER_TICKS_PER_SEC) && (QUICK_TIMER_TICKS_PER_SEC > 0)
        if (event & TIMER_2_EVT_MASK)
        {
            btu_process_quick_timer_evt();
        }
#endif


#if (RPC_INCLUDED == TRUE)
        /* if RPC message queue event */
        if (event & RPCGEN_MSG_EVT)
        {
            if ((p_msg = (BT_HDR *) GKI_read_mbox(RPCGEN_MSG_MBOX)) != NULL)
                RPCT_RpcgenMsg(p_msg);  /* handle RPC message queue */
        }
#endif

#if (defined(BTU_BTA_INCLUDED) && BTU_BTA_INCLUDED == TRUE)
        if (event & TASK_MBOX_2_EVT_MASK)
        {
            while ((p_msg = (BT_HDR *) GKI_read_mbox(TASK_MBOX_2)) != NULL)
            {
                bta_sys_event(p_msg);
            }
        }

        if (event & TIMER_1_EVT_MASK)
        {
            bta_sys_timer_update();
        }
#endif

        if (event & TIMER_3_EVT_MASK) {
            BTM_TRACE_API("Received oneshot timer event complete");
            if (!GKI_timer_queue_is_empty(&btu_cb.timer_queue_oneshot)) {
                TIMER_LIST_ENT *p_tle = GKI_timer_getfirst(&btu_cb.timer_queue_oneshot);
                INT32 ticks_since_last_update = GKI_timer_ticks_getinitial(GKI_timer_getfirst(&btu_cb.timer_queue_oneshot));
                GKI_update_timer_list(&btu_cb.timer_queue_oneshot, ticks_since_last_update);
            }

            while (!GKI_timer_queue_is_empty(&btu_cb.timer_queue_oneshot)) {
                TIMER_LIST_ENT *p_tle = GKI_timer_getfirst(&btu_cb.timer_queue_oneshot);
                if (p_tle->ticks != 0)
                    break;

                GKI_remove_from_timer_list(&btu_cb.timer_queue_oneshot, p_tle);

                switch (p_tle->event) {
#if (defined(BLE_INCLUDED) && BLE_INCLUDED == TRUE)
                    case BTU_TTYPE_BLE_RANDOM_ADDR:
                        btm_ble_timeout(p_tle);
                        break;
#endif

                    default:
                        // FAIL
                        BTM_TRACE_WARNING("Received unexpected oneshot timer event:0x%x\n",
                            p_tle->event);
                        break;
                }
            }

            /* Update GKI timer with new tick value from first timer. */
            if (!GKI_timer_queue_is_empty(&btu_cb.timer_queue_oneshot)) {
                TIMER_LIST_ENT *p_tle = GKI_timer_getfirst(&btu_cb.timer_queue_oneshot);
                if (p_tle->ticks > 0)
                  GKI_start_timer(TIMER_3, p_tle->ticks, FALSE);
            } else {
                GKI_stop_timer(TIMER_3);
            }
        }

        if (event & EVENT_MASK(APPL_EVT_7))
            break;
    }

    return(0);
}

/*******************************************************************************
**
** Function         btu_start_timer
**
** Description      Start a timer for the specified amount of time.
**                  NOTE: The timeout resolution is in SECONDS! (Even
**                          though the timer structure field is ticks)
**
** Returns          void
**
*******************************************************************************/
void btu_start_timer (TIMER_LIST_ENT *p_tle, UINT16 type, UINT32 timeout)
{
    BT_HDR *p_msg;
    GKI_disable();
    /* if timer list is currently empty, start periodic GKI timer */
    if (btu_cb.timer_queue.p_first == NULL)
    {
        /* if timer starts on other than BTU task */
        if (GKI_get_taskid() != BTU_TASK)
        {
            /* post event to start timer in BTU task */
            if ((p_msg = (BT_HDR *)GKI_getbuf(BT_HDR_SIZE)) != NULL)
            {
                p_msg->event = BT_EVT_TO_START_TIMER;
                GKI_send_msg (BTU_TASK, TASK_MBOX_0, p_msg);
            }
        }
        else
        {
            /* Start free running 1 second timer for list management */
            GKI_start_timer (TIMER_0, GKI_SECS_TO_TICKS (1), TRUE);
        }
    }

    GKI_remove_from_timer_list (&btu_cb.timer_queue, p_tle);

    p_tle->event = type;
    p_tle->ticks = timeout;
    p_tle->ticks_initial = timeout;

    GKI_add_to_timer_list (&btu_cb.timer_queue, p_tle);
    GKI_enable();
}

/*******************************************************************************
**
** Function         btu_remaining_time
**
** Description      Return amount of time to expire
**
** Returns          time in second
**
*******************************************************************************/
UINT32 btu_remaining_time (TIMER_LIST_ENT *p_tle)
{
    return(GKI_get_remaining_ticks (&btu_cb.timer_queue, p_tle));
}

/*******************************************************************************
**
** Function         btu_stop_timer
**
** Description      Stop a timer.
**
** Returns          void
**
*******************************************************************************/
void btu_stop_timer (TIMER_LIST_ENT *p_tle)
{
    BT_HDR *p_msg;
    GKI_disable();
    GKI_remove_from_timer_list (&btu_cb.timer_queue, p_tle);

    /* if timer is stopped on other than BTU task */
    if (GKI_get_taskid() != BTU_TASK)
    {
        /* post event to stop timer in BTU task */
        if ((p_msg = (BT_HDR *)GKI_getbuf(BT_HDR_SIZE)) != NULL)
        {
            p_msg->event = BT_EVT_TO_STOP_TIMER;
            GKI_send_msg (BTU_TASK, TASK_MBOX_0, p_msg);
        }
    }
    else
    {
        /* if timer list is empty stop periodic GKI timer */
        if (btu_cb.timer_queue.p_first == NULL)
        {
            GKI_stop_timer(TIMER_0);
        }
    }
    GKI_enable();
}

#if defined(QUICK_TIMER_TICKS_PER_SEC) && (QUICK_TIMER_TICKS_PER_SEC > 0)
/*******************************************************************************
**
** Function         btu_start_quick_timer
**
** Description      Start a timer for the specified amount of time.
**                  NOTE: The timeout resolution depends on including modules.
**                  QUICK_TIMER_TICKS_PER_SEC should be used to convert from
**                  time to ticks.
**
**
** Returns          void
**
*******************************************************************************/
void btu_start_quick_timer (TIMER_LIST_ENT *p_tle, UINT16 type, UINT32 timeout)
{
    BT_HDR *p_msg;

    GKI_disable();
    /* if timer list is currently empty, start periodic GKI timer */
    if (btu_cb.quick_timer_queue.p_first == NULL)
    {
        /* script test calls stack API without posting event */
        if (GKI_get_taskid() != BTU_TASK)
        {
            /* post event to start timer in BTU task */
            if ((p_msg = (BT_HDR *)GKI_getbuf(BT_HDR_SIZE)) != NULL)
            {
                p_msg->event = BT_EVT_TO_START_QUICK_TIMER;
                GKI_send_msg (BTU_TASK, TASK_MBOX_0, p_msg);
            }
        }
        else
            GKI_start_timer(TIMER_2, QUICK_TIMER_TICKS, TRUE);
    }

    GKI_remove_from_timer_list (&btu_cb.quick_timer_queue, p_tle);

    p_tle->event = type;
    p_tle->ticks = timeout;
    p_tle->ticks_initial = timeout;

    GKI_add_to_timer_list (&btu_cb.quick_timer_queue, p_tle);
    GKI_enable();
}


/*******************************************************************************
**
** Function         btu_stop_quick_timer
**
** Description      Stop a timer.
**
** Returns          void
**
*******************************************************************************/
void btu_stop_quick_timer (TIMER_LIST_ENT *p_tle)
{
    GKI_disable();
    GKI_remove_from_timer_list (&btu_cb.quick_timer_queue, p_tle);

    /* if timer list is empty stop periodic GKI timer */
    if (btu_cb.quick_timer_queue.p_first == NULL)
    {
        GKI_stop_timer(TIMER_2);
    }
    GKI_enable();
}

/*******************************************************************************
**
** Function         btu_process_quick_timer_evt
**
** Description      Process quick timer event
**
** Returns          void
**
*******************************************************************************/
void btu_process_quick_timer_evt(void)
{
    process_quick_timer_evt(&btu_cb.quick_timer_queue);

    /* if timer list is empty stop periodic GKI timer */
    if (btu_cb.quick_timer_queue.p_first == NULL)
    {
        GKI_stop_timer(TIMER_2);
    }
}

/*******************************************************************************
**
** Function         process_quick_timer_evt
**
** Description      Process quick timer event
**
** Returns          void
**
*******************************************************************************/
void process_quick_timer_evt(TIMER_LIST_Q *p_tlq)
{
    TIMER_LIST_ENT  *p_tle;

    GKI_update_timer_list (p_tlq, 1);

    while ((p_tlq->p_first) && (!p_tlq->p_first->ticks))
    {
        p_tle = p_tlq->p_first;
        GKI_remove_from_timer_list (p_tlq, p_tle);

        switch (p_tle->event)
        {
            case BTU_TTYPE_L2CAP_CHNL:      /* monitor or retransmission timer */
            case BTU_TTYPE_L2CAP_FCR_ACK:   /* ack timer */
                l2c_process_timeout (p_tle);
                break;

            default:
                break;
        }
    }
}
#endif /* defined(QUICK_TIMER_TICKS_PER_SEC) && (QUICK_TIMER_TICKS_PER_SEC > 0) */

/*
 * Starts a oneshot timer with a timeout in seconds.
 */
void btu_start_timer_oneshot(TIMER_LIST_ENT *p_tle, UINT16 type, UINT32 timeout_in_secs) {
    INT32 timeout_in_ticks = GKI_SECS_TO_TICKS(timeout_in_secs);
    BTM_TRACE_DEBUG("Starting oneshot timer type:%d timeout:%ds", type, timeout_in_secs);
    GKI_disable();
    if (GKI_timer_queue_is_empty(&btu_cb.timer_queue_oneshot)) {
        /* RPC to BTU thread if timer start request from non-BTU task */
        if (GKI_get_taskid() != BTU_TASK) {
            /* post event to start timer in BTU task */
            BTM_TRACE_WARNING("Posting oneshot timer event to btu_task");
            BT_HDR *p_msg = (BT_HDR *)GKI_getbuf(BT_HDR_SIZE);
            if (p_msg != NULL) {
                p_msg->event = BT_EVT_TO_START_TIMER_ONESHOT;
                GKI_send_msg (BTU_TASK, TASK_MBOX_0, p_msg);
            }
        } else {
            GKI_start_timer(TIMER_3, timeout_in_ticks, FALSE);
        }
    }

    GKI_remove_from_timer_list(&btu_cb.timer_queue_oneshot, p_tle);

    p_tle->event = type;
    p_tle->ticks = timeout_in_ticks;
    p_tle->ticks_initial = timeout_in_ticks;

    GKI_add_to_timer_list(&btu_cb.timer_queue_oneshot, p_tle);
    GKI_enable();
}

void btu_stop_timer_oneshot(TIMER_LIST_ENT *p_tle) {
    GKI_disable();
    GKI_remove_from_timer_list(&btu_cb.timer_queue_oneshot, p_tle);

    if (GKI_get_taskid() != BTU_TASK) {
        /* post event to stop timer in BTU task */
        BT_HDR *p_msg = (BT_HDR *)GKI_getbuf(BT_HDR_SIZE);
        if (p_msg != NULL) {
            p_msg->event = BT_EVT_TO_STOP_TIMER_ONESHOT;
            GKI_send_msg (BTU_TASK, TASK_MBOX_0, p_msg);
        }
    } else {
        if (GKI_timer_queue_is_empty(&btu_cb.timer_queue_oneshot)) {
            BTM_TRACE_WARNING("Stopping oneshot timer");
            GKI_stop_timer(TIMER_3);
        } else {
            BTM_TRACE_WARNING("Request to stop oneshot timer with non empty queue");
        }
    }
    GKI_enable();
}

#if (defined(HCILP_INCLUDED) && HCILP_INCLUDED == TRUE)
/*******************************************************************************
**
** Function         btu_check_bt_sleep
**
** Description      This function is called to check if controller can go to sleep.
**
** Returns          void
**
*******************************************************************************/
void btu_check_bt_sleep (void)
{
    if ((btu_cb.hci_cmd_cb[LOCAL_BR_EDR_CONTROLLER_ID].cmd_cmpl_q.count == 0)
        &&(btu_cb.hci_cmd_cb[LOCAL_BR_EDR_CONTROLLER_ID].cmd_xmit_q.count == 0))
    {
        if (l2cb.controller_xmit_window == l2cb.num_lm_acl_bufs)
        {
            /* enable dev to sleep  in the cmd cplt and cmd status only and num cplt packet */
            HCI_LP_ALLOW_BT_DEVICE_SLEEP();
        }
    }
}
#endif
