/******************************************************************************
 *
 *  Copyright (C) 2003-2013 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.
 *
 ******************************************************************************/


/******************************************************************************
 *
 *  This is the main implementation file for the NFA_RW
 *
 ******************************************************************************/
#include <string.h>
#include "nfa_rw_api.h"
#include "nfa_sys.h"
#include "nfa_rw_int.h"
#include "nfa_dm_int.h"
#include "nfa_sys_int.h"

/* NFA_RW control block */
tNFA_RW_CB nfa_rw_cb;

/*****************************************************************************
** Constants and types
*****************************************************************************/
static const tNFA_SYS_REG nfa_rw_sys_reg =
{
    NULL,
    nfa_rw_handle_event,
    nfa_rw_sys_disable,
    NULL
};

/* NFA_RW actions */
const tNFA_RW_ACTION nfa_rw_action_tbl[] =
{
    nfa_rw_handle_op_req,           /* NFA_RW_OP_REQUEST_EVT            */
    nfa_rw_activate_ntf,            /* NFA_RW_ACTIVATE_NTF_EVT          */
    nfa_rw_deactivate_ntf,          /* NFA_RW_DEACTIVATE_NTF_EVT        */
    nfa_rw_presence_check_tick,     /* NFA_RW_PRESENCE_CHECK_TICK_EVT   */
};


/*****************************************************************************
** Local function prototypes
*****************************************************************************/
#if (BT_TRACE_VERBOSE == TRUE)
static char *nfa_rw_evt_2_str (UINT16 event);
#endif

/*******************************************************************************
**
** Function         nfa_rw_init
**
** Description      Initialize NFA RW
**
** Returns          None
**
*******************************************************************************/
void nfa_rw_init (void)
{
    NFA_TRACE_DEBUG0 ("nfa_rw_init ()");

    /* initialize control block */
    memset (&nfa_rw_cb, 0, sizeof (tNFA_RW_CB));

    /* register message handler on NFA SYS */
    nfa_sys_register (NFA_ID_RW,  &nfa_rw_sys_reg);
}

/*******************************************************************************
**
** Function         nfa_rw_sys_disable
**
** Description      Clean up rw sub-system
**
**
** Returns          void
**
*******************************************************************************/
void nfa_rw_sys_disable (void)
{
    /* Return to idle */
    NFC_SetStaticRfCback (NULL);

    /* Stop presence check timer (if started) */
    nfa_rw_stop_presence_check_timer ();

    /* Free scratch buffer if any */
    nfa_rw_free_ndef_rx_buf ();

    /* Free pending command if any */
    if (nfa_rw_cb.p_pending_msg)
    {
        GKI_freebuf (nfa_rw_cb.p_pending_msg);
        nfa_rw_cb.p_pending_msg = NULL;
    }

    nfa_sys_deregister (NFA_ID_RW);
}

/*******************************************************************************
**
** Function         nfa_rw_proc_disc_evt
**
** Description      Called by nfa_dm to handle ACTIVATED/DEACTIVATED  events
**
** Returns          void
**
*******************************************************************************/
void nfa_rw_proc_disc_evt (tNFA_DM_RF_DISC_EVT event, tNFC_DISCOVER *p_data, BOOLEAN excl_rf_not_active)
{
    tNFA_RW_MSG msg;

    switch (event)
    {
    case NFA_DM_RF_DISC_ACTIVATED_EVT:
        msg.hdr.event                       = NFA_RW_ACTIVATE_NTF_EVT;
        msg.activate_ntf.p_activate_params  = &p_data->activate;
        msg.activate_ntf.excl_rf_not_active = excl_rf_not_active;

        nfa_rw_handle_event ((BT_HDR *) &msg);
        break;

    case NFA_DM_RF_DISC_DEACTIVATED_EVT:
        msg.hdr.event = NFA_RW_DEACTIVATE_NTF_EVT;

        nfa_rw_handle_event ((BT_HDR *) &msg);
        break;

    default:
        break;
    }
}

/*******************************************************************************
**
** Function         nfa_rw_send_raw_frame
**
** Description      Called by nfa_dm to send raw frame
**
** Returns          tNFA_STATUS
**
*******************************************************************************/
tNFA_STATUS nfa_rw_send_raw_frame (BT_HDR *p_data)
{
    tNFA_RW_MSG *p_msg;

    if ((p_msg = (tNFA_RW_MSG *) GKI_getbuf ((UINT16) sizeof(tNFA_RW_MSG))) != NULL)
    {
        p_msg->hdr.event = NFA_RW_OP_REQUEST_EVT;
        p_msg->op_req.op = NFA_RW_OP_SEND_RAW_FRAME;

        p_msg->op_req.params.send_raw_frame.p_data = p_data;

        if (nfa_rw_handle_event ((BT_HDR *) p_msg))
            GKI_freebuf (p_msg);

        return (NFA_STATUS_OK);
    }
    return NFA_STATUS_FAILED;
}

/*******************************************************************************
**
** Function         nfa_rw_handle_event
**
** Description      nfa rw main event handling function.
**
** Returns          TRUE if caller should free p_msg buffer
**
*******************************************************************************/
BOOLEAN nfa_rw_handle_event(BT_HDR *p_msg)
{
    UINT16 act_idx;

#if (BT_TRACE_VERBOSE == TRUE)
    NFA_TRACE_EVENT3 ("nfa_rw_handle_event event: %s (0x%02x), flags: %08x", nfa_rw_evt_2_str (p_msg->event), p_msg->event, nfa_rw_cb.flags);
#else
    NFA_TRACE_EVENT2 ("nfa_rw_handle_event event: 0x%x, flags: %08x",p_msg->event, nfa_rw_cb.flags);
#endif

    /* Get NFA_RW sub-event */
    if ((act_idx = (p_msg->event & 0x00FF)) < (NFA_RW_MAX_EVT & 0xFF))
    {
        return (*nfa_rw_action_tbl[act_idx]) ( (tNFA_RW_MSG*) p_msg);
    }
    else
    {
        NFA_TRACE_ERROR1 ("nfa_rw_handle_event: unhandled event 0x%02X", p_msg->event);
        return TRUE;
    }
}


#if (BT_TRACE_VERBOSE == TRUE)
/*******************************************************************************
**
** Function         nfa_rw_evt_2_str
**
** Description      convert nfa_rw evt to string
**
*******************************************************************************/
static char *nfa_rw_evt_2_str (UINT16 event)
{
    switch (event)
    {
    case NFA_RW_OP_REQUEST_EVT:
        return "NFA_RW_OP_REQUEST_EVT";

    case NFA_RW_ACTIVATE_NTF_EVT:
        return "NFA_RW_ACTIVATE_NTF_EVT";

    case NFA_RW_DEACTIVATE_NTF_EVT:
        return "NFA_RW_DEACTIVATE_NTF_EVT";

    case NFA_RW_PRESENCE_CHECK_TICK_EVT:
        return "NFA_RW_PRESENCE_CHECK_TICK_EVT";

    default:
        return "Unknown";
    }
}
#endif /* BT_TRACE_VERBOSE */