xref: /external/libnfc-nci/src/nfc/tags/rw_t3t.c

/******************************************************************************
 *
 *  Copyright (C) 2010-2014 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 implementation for Type 3 tag in Reader/Writer
 *  mode.
 *
 ******************************************************************************/
#include <string.h>
#include "nfc_target.h"
#include "bt_types.h"
#include "trace_api.h"

#include "nfc_api.h"
#include "nfc_int.h"
#include "nci_hmsgs.h"
#include "rw_api.h"
#include "rw_int.h"
#include "tags_int.h"
#include "gki.h"

/* Definitions for constructing t3t command messages */
#define RW_T3T_FL_PADDING   0x01        /* Padding needed for last NDEF block */
#define RW_T3T_MAX_NDEF_BLOCKS_PER_UPDATE_1_BYTE_FORMAT (13)    /* Maximum number of NDEF blocks updates that can fit into one command (when all block-numbers are < 256) */
#define RW_T3T_MAX_NDEF_BLOCKS_PER_UPDATE_2_BYTE_FORMAT (12)    /* Maximum number of NDEF blocks updates that can fit into one command (when all block-numbers are >= 256) */

/* Definitions for SENSF_RES */
#define RW_T3T_SENSF_RES_RD_OFFSET      17  /* Offset of RD in SENSF_RES from NCI_POLL NTF (includes 1 byte SENSF_RES length) */
#define RW_T3T_SENSF_RES_RD_LEN         2   /* Size of RD in SENSF_RES   */

/* Timeout definitions for commands */
#define RW_T3T_POLL_CMD_TIMEOUT_TICKS                               ((RW_T3T_TOUT_RESP*2*QUICK_TIMER_TICKS_PER_SEC) / 1000)
#define RW_T3T_DEFAULT_CMD_TIMEOUT_TICKS                            ((RW_T3T_TOUT_RESP*QUICK_TIMER_TICKS_PER_SEC) / 1000)
#define RW_T3T_RAW_FRAME_CMD_TIMEOUT_TICKS                          (RW_T3T_DEFAULT_CMD_TIMEOUT_TICKS * 4)
#define RW_T3T_MIN_TIMEOUT_TICKS                                    10

/* Macro to extract major version from NDEF version byte */
#define T3T_GET_MAJOR_VERSION(ver)      (ver>>4)

/* Enumeration of API commands */
enum
{
    RW_T3T_CMD_DETECT_NDEF,
    RW_T3T_CMD_CHECK_NDEF,
    RW_T3T_CMD_UPDATE_NDEF,
    RW_T3T_CMD_CHECK,
    RW_T3T_CMD_UPDATE,
    RW_T3T_CMD_SEND_RAW_FRAME,
    RW_T3T_CMD_GET_SYSTEM_CODES,
    RW_T3T_CMD_FORMAT,
    RW_T3T_CMD_SET_READ_ONLY_SOFT,
    RW_T3T_CMD_SET_READ_ONLY_HARD,

    RW_T3T_CMD_MAX
};

/* RW_CBACK events corresponding to API comands */
const UINT8 rw_t3t_api_res_evt[RW_T3T_CMD_MAX] =
{
    RW_T3T_NDEF_DETECT_EVT,         /* RW_T3T_CMD_DETECT_NDEF */
    RW_T3T_CHECK_CPLT_EVT,          /* RW_T3T_CMD_CHECK_NDEF  */
    RW_T3T_UPDATE_CPLT_EVT,         /* RW_T3T_CMD_UPDATE_NDEF */
    RW_T3T_CHECK_CPLT_EVT,          /* RW_T3T_CMD_CHECK */
    RW_T3T_UPDATE_CPLT_EVT,         /* RW_T3T_CMD_UPDATE */
    RW_T3T_RAW_FRAME_EVT,           /* RW_T3T_CMD_SEND_RAW_FRAME */
    RW_T3T_GET_SYSTEM_CODES_EVT,    /* RW_T3T_CMD_GET_SYSTEM_CODES */
    RW_T3T_FORMAT_CPLT_EVT,         /* RW_T3T_CMD_FORMAT */
    RW_T3T_SET_READ_ONLY_CPLT_EVT   /* RW_T3T_CMD_SET_READ_ONLY */
};

/* States */
enum
{
    RW_T3T_STATE_NOT_ACTIVATED,
    RW_T3T_STATE_IDLE,
    RW_T3T_STATE_COMMAND_PENDING
};

/* Sub-states */
enum
{
    /* Sub states for getting system codes */
    RW_T3T_GET_SC_SST_POLL_WILDCARD,        /* Waiting for wilcard poll response */
    RW_T3T_GET_SC_SST_POLL_NDEF,            /* Waiting for NDEF poll response */
    RW_T3T_GET_SC_SST_REQUEST_SC,           /* Waiting for REQUEST_SYSTEM_CODE response */

    /* Sub states for formatting Felica-Lite */
    RW_T3T_FMT_SST_POLL_FELICA_LITE,        /* Waiting for POLL Felica-Lite response (for formatting) */
    RW_T3T_FMT_SST_CHECK_MC_BLK,            /* Waiting for Felica-Lite MC (MemoryControl) block-read to complete */
    RW_T3T_FMT_SST_UPDATE_MC_BLK,           /* Waiting for Felica-Lite MC (MemoryControl) block-write to complete */
    RW_T3T_FMT_SST_UPDATE_NDEF_ATTRIB,      /* Waiting for NDEF attribute block-write to complete */

    /* Sub states for setting Felica-Lite read only */
    RW_T3T_SRO_SST_POLL_FELICA_LITE,        /* Waiting for POLL Felica-Lite response (for setting read only) */
    RW_T3T_SRO_SST_UPDATE_NDEF_ATTRIB,      /* Waiting for NDEF attribute block-write to complete */
    RW_T3T_SRO_SST_CHECK_MC_BLK,            /* Waiting for Felica-Lite MC (MemoryControl) block-read to complete */
    RW_T3T_SRO_SST_UPDATE_MC_BLK            /* Waiting for Felica-Lite MC (MemoryControl) block-write to complete */
};

#if (BT_TRACE_VERBOSE == TRUE)
static char *rw_t3t_cmd_str (UINT8 cmd_id);
static char *rw_t3t_state_str (UINT8 state_id);
#endif


/* Local static functions */
static void rw_t3t_update_ndef_flag (UINT8 *p_flag);
static tNFC_STATUS rw_t3t_unselect (UINT8 peer_nfcid2[]);
static BT_HDR *rw_t3t_get_cmd_buf (void);
static tNFC_STATUS rw_t3t_send_to_lower (BT_HDR *p_msg);
static void rw_t3t_handle_get_system_codes_cplt (void);
static void rw_t3t_handle_get_sc_poll_rsp (tRW_T3T_CB *p_cb, UINT8 nci_status, UINT8 num_responses, UINT8 sensf_res_buf_size, UINT8 *p_sensf_res_buf);
static void rw_t3t_handle_ndef_detect_poll_rsp (tRW_T3T_CB *p_cb, UINT8 nci_status, UINT8 num_responses, UINT8 sensf_res_buf_size, UINT8 *p_sensf_res_buf);
static void rw_t3t_handle_fmt_poll_rsp (tRW_T3T_CB *p_cb, UINT8 nci_status, UINT8 num_responses, UINT8 sensf_res_buf_size, UINT8 *p_sensf_res_buf);
static void rw_t3t_handle_sro_poll_rsp (tRW_T3T_CB *p_cb, UINT8 nci_status, UINT8 num_responses, UINT8 sensf_res_buf_size, UINT8 *p_sensf_res_buf);


/* Default NDEF attribute information block (used when formatting Felica-Lite tags) */
#define RW_T3T_DEFAULT_FELICALITE_NBR       4   /* NBr (max block reads per cmd)*/
#define RW_T3T_DEFAULT_FELICALITE_NBW       1   /* NBw (max block write per cmd)*/
#define RW_T3T_DEFAULT_FELICALITE_NMAXB     (T3T_FELICALITE_NMAXB)
#define RW_T3T_DEFAULT_FELICALITE_ATTRIB_INFO_CHECKSUM  ((T3T_MSG_NDEF_VERSION +                    \
                                                            RW_T3T_DEFAULT_FELICALITE_NBR +         \
                                                            RW_T3T_DEFAULT_FELICALITE_NBW +         \
                                                            (RW_T3T_DEFAULT_FELICALITE_NMAXB>>8) +  \
                                                            (RW_T3T_DEFAULT_FELICALITE_NMAXB&0xFF) +\
                                                            T3T_MSG_NDEF_WRITEF_OFF +               \
                                                            T3T_MSG_NDEF_RWFLAG_RW) & 0xFFFF)

const UINT8 rw_t3t_default_attrib_info[T3T_MSG_BLOCKSIZE] =
{
    T3T_MSG_NDEF_VERSION,                   /* Ver                          */
    RW_T3T_DEFAULT_FELICALITE_NBR,          /* NBr (max block reads per cmd)*/
    RW_T3T_DEFAULT_FELICALITE_NBW,          /* NBw (max block write per cmd)*/
    (RW_T3T_DEFAULT_FELICALITE_NMAXB>>8),   /* Nmaxb (max size in blocks)   */
    (RW_T3T_DEFAULT_FELICALITE_NMAXB&0xFF), /* Nmaxb (max size in blocks)   */
    0, 0, 0, 0,                             /* Unused                       */
    T3T_MSG_NDEF_WRITEF_OFF,                /* WriteF                       */
    T3T_MSG_NDEF_RWFLAG_RW,                 /* RW Flag                      */
    0, 0, 0,                                /* Ln (current size in bytes)   */

    (RW_T3T_DEFAULT_FELICALITE_ATTRIB_INFO_CHECKSUM >> 8),     /* checksum (high-byte) */
    (RW_T3T_DEFAULT_FELICALITE_ATTRIB_INFO_CHECKSUM & 0xFF)    /* checksum (low-byte)  */

};

/* This is (T/t3t * 4^E) , E is the index of the array. The unit is .0001 ms */
static const UINT32 rw_t3t_mrti_base [] =
{
    302,
    1208,
    4832,
    19328
};


/*******************************************************************************
**
** Function         rw_t3t_check_timeout
**
** Description      The timeout value is a + b * number_blocks)
**
** Returns          timeout value in ticks
**
*******************************************************************************/
static UINT32 rw_t3t_check_timeout (UINT16 num_blocks)
{
    tRW_T3T_CB  *p_cb    = &rw_cb.tcb.t3t;
    UINT32      timeout;
    UINT32      extra;

    timeout = (p_cb->check_tout_a + num_blocks * p_cb->check_tout_b)*QUICK_TIMER_TICKS_PER_SEC/1000000;
    /* allow some extra time for driver */
    extra   = (timeout / 10) + RW_T3T_MIN_TIMEOUT_TICKS;
    timeout += extra;

    return timeout;
}

/*******************************************************************************
**
** Function         rw_t3t_update_timeout
**
** Description      The timeout value is a + b * number_blocks)
**
** Returns          timeout value in ticks
**
*******************************************************************************/
static UINT32 rw_t3t_update_timeout (UINT16 num_blocks)
{
    tRW_T3T_CB  *p_cb    = &rw_cb.tcb.t3t;
    UINT32      timeout;
    UINT32      extra;

    timeout = (p_cb->update_tout_a + num_blocks * p_cb->update_tout_b)*QUICK_TIMER_TICKS_PER_SEC/1000000;
    /* allow some extra time for driver */
    extra   = (timeout / 10) + RW_T3T_MIN_TIMEOUT_TICKS;
    timeout += extra;

    return timeout;
}
/*******************************************************************************
**
** Function         rw_t3t_process_error
**
** Description      Process error (timeout or CRC error)
**
** Returns          none
**
*******************************************************************************/
void rw_t3t_process_error (tNFC_STATUS status)
{
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;
    UINT8 evt;
    tRW_DATA evt_data;
    BT_HDR *p_cmd_buf;

    if (p_cb->rw_state == RW_T3T_STATE_COMMAND_PENDING)
    {
        if (p_cb->cur_cmd == RW_T3T_CMD_GET_SYSTEM_CODES)
        {
            /* For GetSystemCode: either tag did not respond to requested POLL, or REQUEST_SYSTEM_CODE command */
            rw_t3t_handle_get_system_codes_cplt ();
            return;
        }
        /* Retry sending command if retry-count < max */
        else if (rw_cb.cur_retry < RW_MAX_RETRIES)
        {
            /* retry sending the command */
            rw_cb.cur_retry++;

            RW_TRACE_DEBUG2 ("T3T retransmission attempt %i of %i", rw_cb.cur_retry, RW_MAX_RETRIES);

            /* allocate a new buffer for message */
            if ((p_cmd_buf = rw_t3t_get_cmd_buf ()) != NULL)
            {
                memcpy (p_cmd_buf, p_cb->p_cur_cmd_buf, sizeof (BT_HDR) + p_cb->p_cur_cmd_buf->offset + p_cb->p_cur_cmd_buf->len);

                if (rw_t3t_send_to_lower (p_cmd_buf) == NFC_STATUS_OK)
                {
                    /* Start timer for waiting for response */
                    nfc_start_quick_timer (&p_cb->timer, NFC_TTYPE_RW_T3T_RESPONSE, p_cb->cur_tout);
                    return;
                }
                else
                {
                    /* failure - could not send buffer */
                    GKI_freebuf (p_cmd_buf);
                }
            }
        }
        else
        {
            RW_TRACE_DEBUG1 ("T3T maximum retransmission attempts reached (%i)", RW_MAX_RETRIES);
        }

#if (defined (RW_STATS_INCLUDED) && (RW_STATS_INCLUDED == TRUE))
        /* update failure count */
        rw_main_update_fail_stats ();
#endif  /* RW_STATS_INCLUDED */

        p_cb->rw_state = RW_T3T_STATE_IDLE;

        /* Notify app of result (if there was a pending command) */
        if (p_cb->cur_cmd < RW_T3T_CMD_MAX)
        {
            /* If doing presence check, use status=NFC_STATUS_FAILED, otherwise NFC_STATUS_TIMEOUT */
            evt_data.status = status;
            evt = rw_t3t_api_res_evt[p_cb->cur_cmd];

            /* Set additional flags for RW_T3T_NDEF_DETECT_EVT */
            if (evt == RW_T3T_NDEF_DETECT_EVT)
            {
                evt_data.ndef.flags = RW_NDEF_FL_UNKNOWN;
                rw_t3t_update_ndef_flag (&evt_data.ndef.flags);
            }

            (*(rw_cb.p_cback)) (evt, &evt_data);
        }
    }
    else
    {
        evt_data.status = status;
        (*(rw_cb.p_cback)) (RW_T3T_INTF_ERROR_EVT, &evt_data);
    }
}

/*******************************************************************************
**
** Function         rw_t3t_start_poll_timer
**
** Description      Start the timer for T3T POLL Command
**
** Returns          none
**
*******************************************************************************/
void rw_t3t_start_poll_timer (tRW_T3T_CB *p_cb)
{
    nfc_start_quick_timer (&p_cb->poll_timer, NFC_TTYPE_RW_T3T_RESPONSE, RW_T3T_POLL_CMD_TIMEOUT_TICKS);
}

/*******************************************************************************
**
** Function         rw_t3t_handle_nci_poll_ntf
**
** Description      Handle NCI_T3T_POLLING_NTF
**
** Returns          none
**
*******************************************************************************/
void rw_t3t_handle_nci_poll_ntf (UINT8 nci_status, UINT8 num_responses, UINT8 sensf_res_buf_size, UINT8 *p_sensf_res_buf)
{
    tRW_DATA evt_data;
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;

    /* stop timer for poll response */
    nfc_stop_quick_timer (&p_cb->poll_timer);

    /* Stop t3t timer (if started) */
    if (p_cb->flags & RW_T3T_FL_W4_PRESENCE_CHECK_POLL_RSP)
    {
        p_cb->flags &= ~RW_T3T_FL_W4_PRESENCE_CHECK_POLL_RSP;
        evt_data.status = nci_status;
        p_cb->rw_state = RW_T3T_STATE_IDLE;
        (*(rw_cb.p_cback)) (RW_T3T_PRESENCE_CHECK_EVT, (tRW_DATA *) &evt_data);
    }
    else if (p_cb->flags & RW_T3T_FL_W4_GET_SC_POLL_RSP)
    {
        /* Handle POLL ntf in response to get system codes */
        p_cb->flags &= ~RW_T3T_FL_W4_GET_SC_POLL_RSP;
        rw_t3t_handle_get_sc_poll_rsp (p_cb, nci_status, num_responses, sensf_res_buf_size, p_sensf_res_buf);
    }
    else if (p_cb->flags & RW_T3T_FL_W4_FMT_FELICA_LITE_POLL_RSP)
    {
        /* Handle POLL ntf in response to get system codes */
        p_cb->flags &= ~RW_T3T_FL_W4_FMT_FELICA_LITE_POLL_RSP;
        rw_t3t_handle_fmt_poll_rsp (p_cb, nci_status, num_responses, sensf_res_buf_size, p_sensf_res_buf);
    }
    else if (p_cb->flags & RW_T3T_FL_W4_SRO_FELICA_LITE_POLL_RSP)
    {
        /* Handle POLL ntf in response to get system codes */
        p_cb->flags &= ~RW_T3T_FL_W4_SRO_FELICA_LITE_POLL_RSP;
        rw_t3t_handle_sro_poll_rsp (p_cb, nci_status, num_responses, sensf_res_buf_size, p_sensf_res_buf);
    }
    else if (p_cb->flags & RW_T3T_FL_W4_NDEF_DETECT_POLL_RSP)
    {
        /* Handle POLL ntf in response to ndef detection */
        p_cb->flags &= ~RW_T3T_FL_W4_NDEF_DETECT_POLL_RSP;
        rw_t3t_handle_ndef_detect_poll_rsp (p_cb, nci_status, num_responses, sensf_res_buf_size, p_sensf_res_buf);
    }
    else
    {
        /* Handle POLL ntf in response to RW_T3tPoll */
        if ((evt_data.t3t_poll.status = nci_status) == NCI_STATUS_OK)
        {
            evt_data.t3t_poll.rc = p_cb->cur_poll_rc;
            evt_data.t3t_poll.response_num = num_responses;
            evt_data.t3t_poll.response_bufsize = sensf_res_buf_size;
            evt_data.t3t_poll.response_buf = p_sensf_res_buf;
        }

        p_cb->rw_state = RW_T3T_STATE_IDLE;
        (*(rw_cb.p_cback)) (RW_T3T_POLL_EVT, &evt_data);
    }
}


/*******************************************************************************
**
** Function         rw_t3t_handle_get_system_codes_cplt
**
** Description      Notify upper layer of system codes
**
** Returns          none
**
*******************************************************************************/
void rw_t3t_handle_get_system_codes_cplt (void)
{
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;
    tRW_DATA evt_data;
    UINT8 i;

    evt_data.t3t_sc.status = NFC_STATUS_OK;
    evt_data.t3t_sc.num_system_codes = p_cb->num_system_codes;
    evt_data.t3t_sc.p_system_codes   = p_cb->system_codes;

    RW_TRACE_DEBUG1 ("rw_t3t_handle_get_system_codes_cplt, number of systems: %i", evt_data.t3t_sc.num_system_codes);
    for (i = 0; i < evt_data.t3t_sc.num_system_codes; i++)
    {
        RW_TRACE_DEBUG2 ("   system %i: %04X", i, evt_data.t3t_sc.p_system_codes[i]);
    }

    p_cb->rw_state = RW_T3T_STATE_IDLE;
    (*(rw_cb.p_cback)) (RW_T3T_GET_SYSTEM_CODES_EVT, &evt_data);


}

/*******************************************************************************
**
** Function         rw_t3t_format_cplt
**
** Description      Notify upper layer of format complete
**
** Returns          none
**
*******************************************************************************/
void rw_t3t_format_cplt (tNFC_STATUS status)
{
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;
    tRW_DATA evt_data;

    p_cb->rw_state = RW_T3T_STATE_IDLE;

    /* Update ndef info */
    p_cb->ndef_attrib.status = status;
    if (status == NFC_STATUS_OK)
    {
        p_cb->ndef_attrib.version = T3T_MSG_NDEF_VERSION;
        p_cb->ndef_attrib.nbr = RW_T3T_DEFAULT_FELICALITE_NBR;
        p_cb->ndef_attrib.nbw = RW_T3T_DEFAULT_FELICALITE_NBW;
        p_cb->ndef_attrib.nmaxb = RW_T3T_DEFAULT_FELICALITE_NMAXB;
        p_cb->ndef_attrib.writef = T3T_MSG_NDEF_WRITEF_OFF;
        p_cb->ndef_attrib.rwflag = T3T_MSG_NDEF_RWFLAG_RW;
        p_cb->ndef_attrib.ln = 0;
    }

    /* Notify upper layer of format complete */
    evt_data.status = status;
    (*(rw_cb.p_cback)) (RW_T3T_FORMAT_CPLT_EVT, &evt_data);
}

/*******************************************************************************
**
** Function         rw_t3t_set_readonly_cplt
**
** Description      Notify upper layer of set read only complete
**
** Returns          none
**
*******************************************************************************/
void rw_t3t_set_readonly_cplt (tNFC_STATUS status)
{
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;
    tRW_DATA evt_data;

    p_cb->rw_state = RW_T3T_STATE_IDLE;

    /* Notify upper layer of format complete */
    evt_data.status = status;
    (*(rw_cb.p_cback)) (RW_T3T_SET_READ_ONLY_CPLT_EVT, &evt_data);
}

/*******************************************************************************
**
** Function         rw_t3t_process_timeout
**
** Description      Process timeout
**
** Returns          none
**
*******************************************************************************/
void rw_t3t_process_timeout (TIMER_LIST_ENT *p_tle)
{
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;
    tRW_DATA evt_data;

    /* Check which timer timed out */
    if (p_tle == &p_cb->timer)
    {
        /* UPDATE/CHECK response timeout */
#if (BT_TRACE_VERBOSE == TRUE)
        RW_TRACE_ERROR3 ("T3T timeout. state=%s cur_cmd=0x%02X (%s)", rw_t3t_state_str (rw_cb.tcb.t3t.rw_state), rw_cb.tcb.t3t.cur_cmd, rw_t3t_cmd_str (rw_cb.tcb.t3t.cur_cmd));
#else
        RW_TRACE_ERROR2 ("T3T timeout. state=0x%02X cur_cmd=0x%02X", rw_cb.tcb.t3t.rw_state, rw_cb.tcb.t3t.cur_cmd);
#endif

        rw_t3t_process_error (NFC_STATUS_TIMEOUT);
    }
    else
    {
        RW_TRACE_ERROR0 ("T3T POLL timeout.");

        /* POLL response timeout */
        if (p_cb->flags & RW_T3T_FL_W4_PRESENCE_CHECK_POLL_RSP)
        {
            /* POLL timeout for presence check */
            p_cb->flags &= ~RW_T3T_FL_W4_PRESENCE_CHECK_POLL_RSP;
            evt_data.status = NFC_STATUS_FAILED;
            p_cb->rw_state = RW_T3T_STATE_IDLE;
            (*(rw_cb.p_cback)) (RW_T3T_PRESENCE_CHECK_EVT, (tRW_DATA *) &evt_data);
        }
        else if (p_cb->flags & RW_T3T_FL_W4_GET_SC_POLL_RSP)
        {
            /* POLL timeout for getting system codes */
            p_cb->flags &= ~RW_T3T_FL_W4_GET_SC_POLL_RSP;
            rw_t3t_handle_get_system_codes_cplt ();
        }
        else if (p_cb->flags & RW_T3T_FL_W4_FMT_FELICA_LITE_POLL_RSP)
        {
            /* POLL timeout for formatting Felica Lite */
            p_cb->flags &= ~RW_T3T_FL_W4_FMT_FELICA_LITE_POLL_RSP;
            RW_TRACE_ERROR0 ("Felica-Lite tag not detected");
            rw_t3t_format_cplt (NFC_STATUS_FAILED);
        }
        else if (p_cb->flags & RW_T3T_FL_W4_SRO_FELICA_LITE_POLL_RSP)
        {
            /* POLL timeout for configuring Felica Lite read only */
            p_cb->flags &= ~RW_T3T_FL_W4_SRO_FELICA_LITE_POLL_RSP;
            RW_TRACE_ERROR0 ("Felica-Lite tag not detected");
            rw_t3t_set_readonly_cplt (NFC_STATUS_FAILED);
        }
        else if (p_cb->flags & RW_T3T_FL_W4_NDEF_DETECT_POLL_RSP)
        {
            /* POLL timeout for ndef detection */
            p_cb->flags &= ~RW_T3T_FL_W4_NDEF_DETECT_POLL_RSP;
            rw_t3t_handle_ndef_detect_poll_rsp (p_cb, NFC_STATUS_TIMEOUT, 0, 0, NULL);
        }
        else
        {
            /* Timeout waiting for response for RW_T3tPoll */
            evt_data.t3t_poll.status = NFC_STATUS_FAILED;
            p_cb->rw_state = RW_T3T_STATE_IDLE;
            (*(rw_cb.p_cback)) (RW_T3T_POLL_EVT, (tRW_DATA *) &evt_data);
        }
    }
}


/*******************************************************************************
**
** Function         rw_t3t_process_frame_error
**
** Description      Process frame crc error
**
** Returns          none
**
*******************************************************************************/
void rw_t3t_process_frame_error (void)
{
#if (BT_TRACE_VERBOSE == TRUE)
    RW_TRACE_ERROR3 ("T3T frame error. state=%s cur_cmd=0x%02X (%s)", rw_t3t_state_str (rw_cb.tcb.t3t.rw_state), rw_cb.tcb.t3t.cur_cmd, rw_t3t_cmd_str (rw_cb.tcb.t3t.cur_cmd));
#else
    RW_TRACE_ERROR2 ("T3T frame error. state=0x%02X cur_cmd=0x%02X", rw_cb.tcb.t3t.rw_state, rw_cb.tcb.t3t.cur_cmd);
#endif

#if (defined (RW_STATS_INCLUDED) && (RW_STATS_INCLUDED == TRUE))
    /* Update stats */
    rw_main_update_crc_error_stats ();
#endif  /* RW_STATS_INCLUDED */

    /* Process the error */
    rw_t3t_process_error (NFC_STATUS_MSG_CORRUPTED);
}

/*******************************************************************************
**
** Function         rw_t3t_send_to_lower
**
** Description      Send command to lower layer
**
** Returns          status of the send
**
*******************************************************************************/
tNFC_STATUS rw_t3t_send_to_lower (BT_HDR *p_msg)
{
    UINT8 *p;

#if (defined (RW_STATS_INCLUDED) && (RW_STATS_INCLUDED == TRUE))
    BOOLEAN is_retry;
    /* Update stats */
    rw_main_update_tx_stats (p_msg->len, ((rw_cb.cur_retry==0) ? FALSE : TRUE));
#endif  /* RW_STATS_INCLUDED */

    /* Set NFC-F SoD field (payload len + 1) */
    p_msg->offset -= 1;         /* Point to SoD field */
    p = (UINT8 *) (p_msg+1) + p_msg->offset;
    UINT8_TO_STREAM (p, (p_msg->len+1));
    p_msg->len += 1;            /* Increment len to include SoD */

#if (BT_TRACE_PROTOCOL == TRUE)
    DispT3TagMessage (p_msg, FALSE);
#endif

    return (NFC_SendData (NFC_RF_CONN_ID, p_msg));
}

/*****************************************************************************
**
** Function         rw_t3t_get_cmd_buf
**
** Description      Get a buffer for sending T3T messages
**
** Returns          BT_HDR *
**
*****************************************************************************/
BT_HDR *rw_t3t_get_cmd_buf (void)
{
    BT_HDR *p_cmd_buf;

    if ((p_cmd_buf = (BT_HDR *) GKI_getpoolbuf (NFC_RW_POOL_ID)) != NULL)
    {
        /* Reserve offset for NCI_DATA_HDR and NFC-F Sod (LEN) field */
        p_cmd_buf->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE + 1;
        p_cmd_buf->len = 0;
    }

    return (p_cmd_buf);
}

/*****************************************************************************
**
** Function         rw_t3t_send_cmd
**
** Description      Send command to tag, and start timer for response
**
** Returns          tNFC_STATUS
**
*****************************************************************************/
tNFC_STATUS rw_t3t_send_cmd (tRW_T3T_CB *p_cb, UINT8 rw_t3t_cmd, BT_HDR *p_cmd_buf, UINT32 timeout_ticks)
{
    tNFC_STATUS retval;

    /* Indicate first attempt to send command, back up cmd buffer in case needed for retransmission */
    rw_cb.cur_retry = 0;
    memcpy (p_cb->p_cur_cmd_buf, p_cmd_buf, sizeof (BT_HDR) + p_cmd_buf->offset + p_cmd_buf->len);

    p_cb->cur_cmd = rw_t3t_cmd;
    p_cb->cur_tout = timeout_ticks;
    p_cb->rw_state = RW_T3T_STATE_COMMAND_PENDING;

    if ((retval = rw_t3t_send_to_lower (p_cmd_buf)) == NFC_STATUS_OK)
    {
        /* Start timer for waiting for response */
        nfc_start_quick_timer (&p_cb->timer, NFC_TTYPE_RW_T3T_RESPONSE, timeout_ticks);
    }
    else
    {
        /* Error sending */
        p_cb->rw_state = RW_T3T_STATE_IDLE;
    }

    RW_TRACE_DEBUG3 ("rw_t3t_send_cmd: cur_tout: %d, timeout_ticks: %d ret:%d",p_cb->cur_tout, timeout_ticks, retval);
    return (retval);
}

/*****************************************************************************
**
** Function         rw_t3t_send_update_ndef_attribute_cmd
**
** Description      Send UPDATE command for Attribute Information
**
** Returns          tNFC_STATUS
**
*****************************************************************************/
tNFC_STATUS rw_t3t_send_update_ndef_attribute_cmd (tRW_T3T_CB *p_cb, BOOLEAN write_in_progress)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    BT_HDR *p_cmd_buf;
    UINT8 *p_cmd_start, *p;
    UINT16 checksum, i;
    UINT8 write_f;
    UINT32 ln;
    UINT8 *p_ndef_attr_info_start;

    if ((p_cmd_buf = rw_t3t_get_cmd_buf ()) != NULL)
    {
        /* Construct T3T message */
        p = p_cmd_start  = (UINT8 *) (p_cmd_buf+1) + p_cmd_buf->offset;

        /* Add UPDATE opcode to message  */
        UINT8_TO_STREAM (p, T3T_MSG_OPC_UPDATE_CMD);

        /* Add IDm to message */
        ARRAY_TO_STREAM (p, p_cb->peer_nfcid2, NCI_NFCID2_LEN);

        /* Add Service code list */
        UINT8_TO_STREAM (p, 1);                       /* Number of services (only 1 service: NDEF) */
        UINT16_TO_STREAM (p, T3T_MSG_NDEF_SC_RW);     /* Service code (little-endian format) */

        /* Add number of blocks in this UPDATE command */
        UINT8_TO_STREAM (p, 1);                      /* Number of blocks to write in this command */

        /* Block List element: the NDEF attribute information block (block 0) */
        UINT8_TO_STREAM (p, T3T_MSG_MASK_TWO_BYTE_BLOCK_DESC_FORMAT);
        UINT8_TO_STREAM (p, 0);

        /* Add payload (Attribute information block) */
        p_ndef_attr_info_start = p;                              /* Save start of a NDEF attribute info block for checksum */
        UINT8_TO_STREAM (p, T3T_MSG_NDEF_VERSION);
        UINT8_TO_STREAM (p, p_cb->ndef_attrib.nbr);
        UINT8_TO_STREAM (p, p_cb->ndef_attrib.nbw);
        UINT16_TO_BE_STREAM (p, p_cb->ndef_attrib.nmaxb);
        UINT32_TO_STREAM (p, 0);

        /* If starting NDEF write: set WriteF=ON, and ln=current ndef length */
        if (write_in_progress)
        {
            write_f = T3T_MSG_NDEF_WRITEF_ON;
            ln = p_cb->ndef_attrib.ln;
        }
        /* If finishing NDEF write: set WriteF=OFF, and ln=new ndef len */
        else
        {
            write_f = T3T_MSG_NDEF_WRITEF_OFF;
            ln = p_cb->ndef_msg_len;
        }
        UINT8_TO_STREAM (p, write_f);
        UINT8_TO_STREAM (p, p_cb->ndef_attrib.rwflag);
        UINT8_TO_STREAM (p, (ln>>16) & 0xFF);    /* High byte (of 3) of Ln */
        UINT8_TO_STREAM (p, (ln>>8) & 0xFF);     /* Middle byte (of 3) of Ln */
        UINT8_TO_STREAM (p, (ln) & 0xFF);        /* Low byte (of 3) of Ln */

        /* Calculate and append Checksum */
        checksum = 0;
        for (i = 0; i < T3T_MSG_NDEF_ATTR_INFO_SIZE; i++)
        {
            checksum+=p_ndef_attr_info_start[i];
        }
        UINT16_TO_BE_STREAM (p, checksum);


        /* Calculate length of message */
        p_cmd_buf->len = (UINT16) (p - p_cmd_start);

        /* Send the T3T message */
        retval = rw_t3t_send_cmd (p_cb, RW_T3T_CMD_UPDATE_NDEF, p_cmd_buf, rw_t3t_update_timeout(1));
    }
    else
    {
        retval = NFC_STATUS_NO_BUFFERS;
    }

    return (retval);
}

/*****************************************************************************
**
** Function         rw_t3t_send_next_ndef_update_cmd
**
** Description      Send next segment of NDEF message to update
**
** Returns          tNFC_STATUS
**
*****************************************************************************/
tNFC_STATUS rw_t3t_send_next_ndef_update_cmd (tRW_T3T_CB *p_cb)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    UINT16 block_id;
    UINT16 first_block_to_write;
    UINT16 ndef_blocks_to_write, ndef_blocks_remaining;
    UINT32 ndef_bytes_remaining, ndef_padding = 0;
    UINT8 flags = 0;
    UINT8 *p_cur_ndef_src_offset;
    BT_HDR *p_cmd_buf;
    UINT8 *p_cmd_start, *p;
    UINT8 blocks_per_update;
    UINT32 timeout;

    if ((p_cmd_buf = rw_t3t_get_cmd_buf ()) != NULL)
    {
        /* Construct T3T message */
        p = p_cmd_start  = (UINT8 *) (p_cmd_buf + 1) + p_cmd_buf->offset;

        /* Calculate number of ndef bytes remaining to write */
        ndef_bytes_remaining = p_cb->ndef_msg_len - p_cb->ndef_msg_bytes_sent;

        /* Calculate number of blocks remaining to write */
        ndef_blocks_remaining = (UINT16) ((ndef_bytes_remaining+15) >> 4);      /* ndef blocks remaining (rounded upward) */

        /* Calculate first NDEF block ID for this UPDATE command */
        first_block_to_write = (UINT16) ((p_cb->ndef_msg_bytes_sent >> 4) + 1);

        /* Calculate max number of blocks per write. */
        if ((first_block_to_write + RW_T3T_MAX_NDEF_BLOCKS_PER_UPDATE_1_BYTE_FORMAT) < 0x100)
        {
            /* All block-numbers are < 0x100 (i.e. can be specified using one-byte format) */
            blocks_per_update = RW_T3T_MAX_NDEF_BLOCKS_PER_UPDATE_1_BYTE_FORMAT;
        }
        else
        {
            /* Block-numbers are >= 0x100 (i.e. need to be specified using two-byte format) */
            blocks_per_update = RW_T3T_MAX_NDEF_BLOCKS_PER_UPDATE_2_BYTE_FORMAT;
        }

        /* Check if blocks_per_update is bigger than what peer allows */
        if (blocks_per_update > p_cb->ndef_attrib.nbw)
            blocks_per_update = p_cb->ndef_attrib.nbw;

        /* Check if remaining blocks can fit into one UPDATE command */
        if (ndef_blocks_remaining <= blocks_per_update)
        {
            /* remaining blocks can fit into one UPDATE command */
            ndef_blocks_to_write = ndef_blocks_remaining;
        }
        else
        {
            /* Remaining blocks cannot fit into one UPDATE command */
            ndef_blocks_to_write = blocks_per_update;
        }


        /* Write to command header for UPDATE */

        /* Add UPDATE opcode to message  */
        UINT8_TO_STREAM (p, T3T_MSG_OPC_UPDATE_CMD);

        /* Add IDm to message */
        ARRAY_TO_STREAM (p, p_cb->peer_nfcid2, NCI_NFCID2_LEN);

        /* Add Service code list */
        UINT8_TO_STREAM (p, 1);                       /* Number of services (only 1 service: NDEF) */
        UINT16_TO_STREAM (p, T3T_MSG_NDEF_SC_RW);     /* Service code (little-endian format) */


        /* Add number of blocks in this UPDATE command */
        UINT8_TO_STREAM (p, ndef_blocks_to_write);   /* Number of blocks to write in this command */
        timeout = rw_t3t_update_timeout(ndef_blocks_to_write);

        for (block_id = first_block_to_write; block_id < (first_block_to_write + ndef_blocks_to_write); block_id++)
        {
            if (block_id<256)
            {
                /* Block IDs 0-255 can be specified in '2-byte' format: byte0=0, byte1=blocknumber */
                UINT8_TO_STREAM (p, T3T_MSG_MASK_TWO_BYTE_BLOCK_DESC_FORMAT);    /* byte0: len=1; access-mode=0; service code list order=0 */
                UINT8_TO_STREAM (p, block_id);                                   /* byte1: block number */
            }
            else
            {
                /* Block IDs 256+ must be specified in '3-byte' format: byte0=80h, followed by blocknumber */
                UINT8_TO_STREAM (p, 0x00);               /* byte0: len=0; access-mode=0; service code list order=0 */
                UINT16_TO_STREAM (p, block_id);          /* byte1-2: block number in little-endian format */
            }

        }

        /* Add NDEF payload */

        /* If this sending last block of NDEF,  check if padding is needed to make payload a multiple of 16 bytes */
        if (ndef_blocks_to_write == ndef_blocks_remaining)
        {
            ndef_padding = (16 - (ndef_bytes_remaining & 0x0F)) & 0x0F;
            if (ndef_padding)
            {
                flags |= RW_T3T_FL_PADDING;
                ndef_blocks_to_write--;         /* handle the last block separately if it needs padding */
            }
        }

        /* Add NDEF payload to the message */
        p_cur_ndef_src_offset = &p_cb->ndef_msg[p_cb->ndef_msg_bytes_sent];


        ARRAY_TO_STREAM (p, p_cur_ndef_src_offset, (ndef_blocks_to_write * 16));
        p_cb->ndef_msg_bytes_sent += ((UINT32) ndef_blocks_to_write * 16);

        if (flags & RW_T3T_FL_PADDING)
        {
            /* Add last of the NDEF message */
            p_cur_ndef_src_offset = &p_cb->ndef_msg[p_cb->ndef_msg_bytes_sent];
            ARRAY_TO_STREAM (p, p_cur_ndef_src_offset, (int) (16-ndef_padding));
            p_cb->ndef_msg_bytes_sent += (16-ndef_padding);

            /* Add padding */
            memset (p, 0, ndef_padding);
            p+=ndef_padding;
        }

        /* Calculate length of message */
        p_cmd_buf->len = (UINT16) (p - p_cmd_start);

        /* Send the T3T message */
        retval = rw_t3t_send_cmd (p_cb, RW_T3T_CMD_UPDATE_NDEF, p_cmd_buf, timeout);
    }
    else
    {
        retval = NFC_STATUS_NO_BUFFERS;
    }

    return (retval);
}



/*****************************************************************************
**
** Function         rw_t3t_send_next_ndef_check_cmd
**
** Description      Send command for reading next segment of NDEF message
**
** Returns          tNFC_STATUS
**
*****************************************************************************/
tNFC_STATUS rw_t3t_send_next_ndef_check_cmd (tRW_T3T_CB *p_cb)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    UINT16 block_id;
    UINT16 ndef_blocks_remaining, first_block_to_read, cur_blocks_to_read;
    UINT32 ndef_bytes_remaining;
    BT_HDR *p_cmd_buf;
    UINT8 *p_cmd_start, *p;

    if ((p_cmd_buf = rw_t3t_get_cmd_buf ()) != NULL)
    {
        /* Construct T3T message */
        p = p_cmd_start  = (UINT8 *) (p_cmd_buf+1) + p_cmd_buf->offset;

        /* Calculate number of ndef bytes remaining to read */
        ndef_bytes_remaining = p_cb->ndef_attrib.ln - p_cb->ndef_rx_offset;

        /* Calculate number of blocks remaining to read */
        ndef_blocks_remaining = (UINT16) ((ndef_bytes_remaining+15) >> 4);      /* ndef blocks remaining (rounded upward) */

        /* Calculate first NDEF block ID */
        first_block_to_read = (UINT16) ((p_cb->ndef_rx_offset >> 4) + 1);

        /* Check if remaining blocks can fit into one CHECK command */
        if (ndef_blocks_remaining <= p_cb->ndef_attrib.nbr)
        {
            /* remaining blocks can fit into one CHECK command */
            cur_blocks_to_read = ndef_blocks_remaining;
            p_cb->ndef_rx_readlen = ndef_bytes_remaining;
            p_cb->flags |= RW_T3T_FL_IS_FINAL_NDEF_SEGMENT;
        }
        else
        {
            /* Remaining blocks cannot fit into one CHECK command */
            cur_blocks_to_read = p_cb->ndef_attrib.nbr;            /* Read maximum number of blocks allowed by the peer */
            p_cb->ndef_rx_readlen = ((UINT32) p_cb->ndef_attrib.nbr * 16);
        }

        RW_TRACE_DEBUG3 ("rw_t3t_send_next_ndef_check_cmd: bytes_remaining: %i, cur_blocks_to_read: %i, is_final: %i",
            ndef_bytes_remaining, cur_blocks_to_read, (p_cb->flags & RW_T3T_FL_IS_FINAL_NDEF_SEGMENT));

        /* Add CHECK opcode to message  */
        UINT8_TO_STREAM (p, T3T_MSG_OPC_CHECK_CMD);

        /* Add IDm to message */
        ARRAY_TO_STREAM (p, p_cb->peer_nfcid2, NCI_NFCID2_LEN);

        /* Add Service code list */
        UINT8_TO_STREAM (p, 1);                       /* Number of services (only 1 service: NDEF) */

        /* Service code (little-endian format) . If NDEF is read-only, then use T3T_MSG_NDEF_SC_RO, otherwise use T3T_MSG_NDEF_SC_RW */
        if (p_cb->ndef_attrib.rwflag == T3T_MSG_NDEF_RWFLAG_RO)
        {
            UINT16_TO_STREAM (p, T3T_MSG_NDEF_SC_RO);
        }
        else
        {
            UINT16_TO_STREAM (p, T3T_MSG_NDEF_SC_RW);
        }

        /* Add number of blocks in this CHECK command */
        UINT8_TO_STREAM (p, cur_blocks_to_read);     /* Number of blocks to check in this command */

        for (block_id = first_block_to_read; block_id < (first_block_to_read + cur_blocks_to_read); block_id++)
        {
            if (block_id<256)
            {
                /* Block IDs 0-255 can be specified in '2-byte' format: byte0=0, byte1=blocknumber */
                UINT8_TO_STREAM (p, T3T_MSG_MASK_TWO_BYTE_BLOCK_DESC_FORMAT);    /* byte1: len=0; access-mode=0; service code list order=0 */
                UINT8_TO_STREAM (p, block_id);                                   /* byte1: block number */
            }
            else
            {
                /* Block IDs 256+ must be specified in '3-byte' format: byte0=80h, followed by blocknumber */
                UINT8_TO_STREAM (p, 0x00);           /* byte0: len=1; access-mode=0; service code list order=0 */
                UINT16_TO_STREAM (p, block_id);      /* byte1-2: block number in little-endian format */
            }

        }

        /* Calculate length of message */
        p_cmd_buf->len = (UINT16) (p - p_cmd_start);

        /* Send the T3T message */
        retval = rw_t3t_send_cmd (p_cb, RW_T3T_CMD_CHECK_NDEF, p_cmd_buf, rw_t3t_check_timeout (cur_blocks_to_read));
    }
    else
    {
        retval = NFC_STATUS_NO_BUFFERS;
    }

    return(retval);
}


/*****************************************************************************
**
** Function         rw_t3t_message_set_block_list
**
** Description      Add block list to T3T message
**
** Returns          Number of bytes added to message
**
*****************************************************************************/
void rw_t3t_message_set_block_list (tRW_T3T_CB *p_cb, UINT8 **p, UINT8 num_blocks, tT3T_BLOCK_DESC *p_t3t_blocks)
{
    UINT16 i, cur_service_code;
    UINT8 service_code_idx, num_services = 0;
    UINT8 *p_msg_num_services;
    UINT16 service_list[T3T_MSG_SERVICE_LIST_MAX];

    /* Add CHECK or UPDATE opcode to message  */
    UINT8_TO_STREAM ((*p), ((p_cb->cur_cmd == RW_T3T_CMD_CHECK) ? T3T_MSG_OPC_CHECK_CMD:T3T_MSG_OPC_UPDATE_CMD));

    /* Add IDm to message */
    ARRAY_TO_STREAM ((*p), p_cb->peer_nfcid2, NCI_NFCID2_LEN);

    /* Skip over Number of Services field */
    p_msg_num_services = (*p);      /* pointer to Number of Services offset */
    (*p)++;

    /* Count number of different services are specified in the list, and add services to Service Code list */
    for (i = 0; i < num_blocks; i++)
    {
        cur_service_code = p_t3t_blocks[i].service_code;

        /* Check if current service_code is already in the service_list */
        for (service_code_idx=0; service_code_idx<num_services; service_code_idx++)
        {
            if (service_list[service_code_idx] == cur_service_code)
                break;
        }

        if (service_code_idx == num_services)
        {
            /* Service not in the list yet. Add it. */
            service_list[service_code_idx] = cur_service_code;
            num_services++;

            /* Add service code to T3T message */
            UINT16_TO_STREAM ((*p), cur_service_code);
        }
    }

    /* Add 'Number of Sservices' to the message */
    *p_msg_num_services = num_services;

    /* Add 'number of blocks' to the message */
    UINT8_TO_STREAM ((*p), num_blocks);

    /* Add block descriptors */
    for (i = 0; i < num_blocks; i++)
    {
        cur_service_code = p_t3t_blocks[i].service_code;

        /* Check if current service_code is already in the service_list */
        for (service_code_idx=0; service_code_idx<num_services; service_code_idx++)
        {
            if (service_list[service_code_idx] == cur_service_code)
                break;
        }

        /* Add decriptor to T3T message */
        if (p_t3t_blocks[i].block_number > 0xFF)
        {
            UINT8_TO_STREAM ((*p), service_code_idx);
            UINT16_TO_STREAM ((*p), p_t3t_blocks[i].block_number);
        }
        else
        {
            service_code_idx |= T3T_MSG_MASK_TWO_BYTE_BLOCK_DESC_FORMAT;
            UINT8_TO_STREAM ((*p), service_code_idx);
            UINT8_TO_STREAM ((*p), p_t3t_blocks[i].block_number);
        }
    }
}

/*****************************************************************************
**
** Function         rw_t3t_send_check_cmd
**
** Description      Send CHECK command
**
** Returns          tNFC_STATUS
**
*****************************************************************************/
tNFC_STATUS rw_t3t_send_check_cmd (tRW_T3T_CB *p_cb, UINT8 num_blocks, tT3T_BLOCK_DESC *p_t3t_blocks)
{
    BT_HDR *p_cmd_buf;
    UINT8 *p, *p_cmd_start;
    tNFC_STATUS retval = NFC_STATUS_OK;

    p_cb->cur_cmd = RW_T3T_CMD_CHECK;
    if ((p_cmd_buf = rw_t3t_get_cmd_buf ()) != NULL)
    {
        /* Construct T3T message */
        p = p_cmd_start = (UINT8 *) (p_cmd_buf+1) + p_cmd_buf->offset;
        rw_t3t_message_set_block_list (p_cb, &p, num_blocks, p_t3t_blocks);

        /* Calculate length of message */
        p_cmd_buf->len = (UINT16) (p - p_cmd_start);

        /* Send the T3T message */
        retval = rw_t3t_send_cmd (p_cb, RW_T3T_CMD_CHECK, p_cmd_buf, rw_t3t_check_timeout(num_blocks));
    }
    else
    {
        retval = NFC_STATUS_NO_BUFFERS;
    }

    return(retval);
}

/*****************************************************************************
**
** Function         rw_t3t_send_update_cmd
**
** Description      Send UPDATE command
**
** Returns          tNFC_STATUS
**
*****************************************************************************/
tNFC_STATUS rw_t3t_send_update_cmd (tRW_T3T_CB *p_cb, UINT8 num_blocks, tT3T_BLOCK_DESC *p_t3t_blocks, UINT8 *p_data)
{
    BT_HDR *p_cmd_buf;
    UINT8 *p, *p_cmd_start;
    tNFC_STATUS retval = NFC_STATUS_OK;

    p_cb->cur_cmd = RW_T3T_CMD_UPDATE;
    if ((p_cmd_buf = rw_t3t_get_cmd_buf ()) != NULL)
    {
        /* Construct T3T message */
        p = p_cmd_start = (UINT8 *) (p_cmd_buf+1) + p_cmd_buf->offset;
        rw_t3t_message_set_block_list (p_cb, &p, num_blocks, p_t3t_blocks);

        /* Add data blocks to the message */
        ARRAY_TO_STREAM (p, p_data, num_blocks*16);

        /* Calculate length of message */
        p_cmd_buf->len = (UINT16) (p - p_cmd_start);

        /* Send the T3T message */
        retval = rw_t3t_send_cmd (p_cb, RW_T3T_CMD_UPDATE, p_cmd_buf, rw_t3t_update_timeout(num_blocks));
    }
    else
    {
        retval = NFC_STATUS_NO_BUFFERS;
    }

    return(retval);
}

/*****************************************************************************
**
** Function         rw_t3t_check_mc_block
**
** Description      Send command to check Memory Configuration Block
**
** Returns          tNFC_STATUS
**
*****************************************************************************/
tNFC_STATUS rw_t3t_check_mc_block (tRW_T3T_CB *p_cb)
{
    BT_HDR *p_cmd_buf;
    UINT8 *p, *p_cmd_start;

    /* Read Memory Configuration block */
    if ((p_cmd_buf = rw_t3t_get_cmd_buf ()) != NULL)
    {
        /* Construct T3T message */
        p = p_cmd_start = (UINT8 *) (p_cmd_buf+1) + p_cmd_buf->offset;

        /* Add CHECK opcode to message  */
        UINT8_TO_STREAM (p, T3T_MSG_OPC_CHECK_CMD);

        /* Add IDm to message */
        ARRAY_TO_STREAM (p, p_cb->peer_nfcid2, NCI_NFCID2_LEN);

        /* Add Service code list */
        UINT8_TO_STREAM (p, 1);                       /* Number of services (only 1 service: NDEF) */
        UINT16_TO_STREAM (p, T3T_MSG_NDEF_SC_RO);     /* Service code (little-endian format) */

        /* Number of blocks */
        UINT8_TO_STREAM (p, 1);                       /* Number of blocks (only 1 block: Memory Configuration Information ) */

        /* Block List element: the Memory Configuration block (block 0x88) */
        UINT8_TO_STREAM (p, T3T_MSG_MASK_TWO_BYTE_BLOCK_DESC_FORMAT);
        UINT8_TO_STREAM (p, T3T_MSG_FELICALITE_BLOCK_ID_MC);

        /* Calculate length of message */
        p_cmd_buf->len = (UINT16) (p - p_cmd_start);

        /* Send the T3T message */
        return rw_t3t_send_cmd (p_cb, p_cb->cur_cmd, p_cmd_buf, rw_t3t_check_timeout(1));
    }
    else
    {
        RW_TRACE_ERROR0 ("Unable to allocate buffer to read MC block");
        return (NFC_STATUS_NO_BUFFERS);
    }
}

/*****************************************************************************
**
** Function         rw_t3t_send_raw_frame
**
** Description      Send raw frame
**
** Returns          tNFC_STATUS
**
*****************************************************************************/
tNFC_STATUS rw_t3t_send_raw_frame (tRW_T3T_CB *p_cb, UINT16 len, UINT8 *p_data)
{
    BT_HDR *p_cmd_buf;
    UINT8 *p;
    tNFC_STATUS retval = NFC_STATUS_OK;

    if ((p_cmd_buf = rw_t3t_get_cmd_buf ()) != NULL)
    {
        /* Construct T3T message */
        p = (UINT8 *) (p_cmd_buf+1) + p_cmd_buf->offset;

        /* Add data blocks to the message */
        ARRAY_TO_STREAM (p, p_data, len);

        /* Calculate length of message */
        p_cmd_buf->len = len;

        /* Send the T3T message */
        retval = rw_t3t_send_cmd (p_cb, RW_T3T_CMD_SEND_RAW_FRAME, p_cmd_buf, RW_T3T_RAW_FRAME_CMD_TIMEOUT_TICKS);
    }
    else
    {
        retval = NFC_STATUS_NO_BUFFERS;
    }

    return (retval);
}


/*****************************************************************************
**  TAG RESPONSE HANDLERS
*****************************************************************************/


/*****************************************************************************
**
** Function         rw_t3t_act_handle_ndef_detect_rsp
**
** Description      Handle response to NDEF detection
**
** Returns          Nothing
**
*****************************************************************************/
void rw_t3t_act_handle_ndef_detect_rsp (tRW_T3T_CB *p_cb, BT_HDR *p_msg_rsp)
{
    UINT8 *p;
    UINT32 temp;
    UINT8 i;
    UINT16 checksum_calc, checksum_rx;
    tRW_DETECT_NDEF_DATA evt_data;
    UINT8 *p_t3t_rsp = (UINT8 *) (p_msg_rsp+1) + p_msg_rsp->offset;

    evt_data.status = NFC_STATUS_FAILED;
    evt_data.flags  = RW_NDEF_FL_UNKNOWN;

    /* Check if response code is CHECK resp (for reading NDEF attribute block) */
    if (p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE] != T3T_MSG_OPC_CHECK_RSP)
    {
        RW_TRACE_ERROR2 ("Response error: expecting rsp_code %02X, but got %02X", T3T_MSG_OPC_CHECK_RSP, p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE]);
        evt_data.status = NFC_STATUS_FAILED;
    }
    /* Validate status code and NFCID2 response from tag */
    else if (  (p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1] != T3T_MSG_RSP_STATUS_OK)                          /* verify response status code */
             ||(memcmp (p_cb->peer_nfcid2, &p_t3t_rsp[T3T_MSG_RSP_OFFSET_IDM], NCI_NFCID2_LEN) != 0)  )   /* verify response IDm */
    {
        evt_data.status = NFC_STATUS_FAILED;
    }
    else
    {
        /* Get checksum from received ndef attribute msg */
        p = &p_t3t_rsp[T3T_MSG_RSP_OFFSET_CHECK_DATA+T3T_MSG_NDEF_ATTR_INFO_SIZE];
        BE_STREAM_TO_UINT16 (checksum_rx, p);

        /* Calculate checksum - move check for checsum to beginning */
        checksum_calc = 0;
        p = &p_t3t_rsp[T3T_MSG_RSP_OFFSET_CHECK_DATA];
        for (i = 0; i < T3T_MSG_NDEF_ATTR_INFO_SIZE; i++)
        {
            checksum_calc+=p[i];
        }

        /* Validate checksum */
        if (checksum_calc != checksum_rx)
        {
            p_cb->ndef_attrib.status = NFC_STATUS_FAILED;       /* only ok or failed passed to the app. can be boolean*/

            RW_TRACE_ERROR0 ("RW_T3tDetectNDEF checksum failed");
        }
        else
        {
            p_cb->ndef_attrib.status = NFC_STATUS_OK;

            /* Validate version number */
            STREAM_TO_UINT8 (p_cb->ndef_attrib.version, p);

            if (T3T_GET_MAJOR_VERSION (T3T_MSG_NDEF_VERSION) < T3T_GET_MAJOR_VERSION (p_cb->ndef_attrib.version))
            {
                /* Remote tag's MajorVer is newer than our's. Reject NDEF as per T3TOP RQ_T3T_NDA_024 */
                RW_TRACE_ERROR2 ("RW_T3tDetectNDEF: incompatible NDEF version. Local=0x%02x, Remote=0x%02x", T3T_MSG_NDEF_VERSION, p_cb->ndef_attrib.version);
                p_cb->ndef_attrib.status = NFC_STATUS_FAILED;
                evt_data.status = NFC_STATUS_BAD_RESP;
            }
            else
            {
                /* Remote tag's MajorVer is equal or older than our's. NDEF is compatible with our version. */

                /* Update NDEF info */
                STREAM_TO_UINT8 (p_cb->ndef_attrib.nbr, p);              /* NBr: number of blocks that can be read using one Check command */
                STREAM_TO_UINT8 (p_cb->ndef_attrib.nbw, p);              /* Nbw: number of blocks that can be written using one Update command */
                BE_STREAM_TO_UINT16 (p_cb->ndef_attrib.nmaxb, p);        /* Nmaxb: maximum number of blocks available for NDEF data */
                BE_STREAM_TO_UINT32 (temp, p);
                STREAM_TO_UINT8 (p_cb->ndef_attrib.writef, p);           /* WriteFlag: 00h if writing data finished; 0Fh if writing data in progress */
                STREAM_TO_UINT8 (p_cb->ndef_attrib.rwflag, p);           /* RWFlag: 00h NDEF is read-only; 01h if read/write available */

                /* Get length (3-byte, big-endian) */
                STREAM_TO_UINT8 (temp, p);                               /* Ln: high-byte */
                BE_STREAM_TO_UINT16 (p_cb->ndef_attrib.ln, p);           /* Ln: lo-word */
                p_cb->ndef_attrib.ln += (temp << 16);


                RW_TRACE_DEBUG1 ("Detected NDEF Ver: 0x%02x", p_cb->ndef_attrib.version);
                RW_TRACE_DEBUG6 ("Detected NDEF Attributes: Nbr=%i, Nbw=%i, Nmaxb=%i, WriteF=%i, RWFlag=%i, Ln=%i",
                    p_cb->ndef_attrib.nbr,
                    p_cb->ndef_attrib.nbw,
                    p_cb->ndef_attrib.nmaxb,
                    p_cb->ndef_attrib.writef,
                    p_cb->ndef_attrib.rwflag,
                    p_cb->ndef_attrib.ln);

                /* Set data for RW_T3T_NDEF_DETECT_EVT */
                evt_data.status = p_cb->ndef_attrib.status;
                evt_data.cur_size = p_cb->ndef_attrib.ln;
                evt_data.max_size = (UINT32) p_cb->ndef_attrib.nmaxb * 16;
                evt_data.protocol = NFC_PROTOCOL_T3T;
                evt_data.flags    = (RW_NDEF_FL_SUPPORTED | RW_NDEF_FL_FORMATED);
                if (p_cb->ndef_attrib.rwflag == T3T_MSG_NDEF_RWFLAG_RO)
                    evt_data.flags    |= RW_NDEF_FL_READ_ONLY;
            }
        }
    }

    RW_TRACE_DEBUG1 ("RW_T3tDetectNDEF response: %i", evt_data.status);

    p_cb->rw_state = RW_T3T_STATE_IDLE;
    rw_t3t_update_ndef_flag (&evt_data.flags);
    /* Notify app of NDEF detection result */
    (*(rw_cb.p_cback)) (RW_T3T_NDEF_DETECT_EVT, (tRW_DATA *) &evt_data);

    GKI_freebuf (p_msg_rsp);
}


/*****************************************************************************
**
** Function         rw_t3t_act_handle_check_rsp
**
** Description      Handle response to CHECK command
**
** Returns          Nothing
**
*****************************************************************************/
void rw_t3t_act_handle_check_rsp (tRW_T3T_CB *p_cb, BT_HDR *p_msg_rsp)
{
    UINT8 *p_t3t_rsp = (UINT8 *) (p_msg_rsp+1) + p_msg_rsp->offset;
    tRW_READ_DATA evt_data;
    tNFC_STATUS nfc_status = NFC_STATUS_OK;

    /* Validate response from tag */
    if (  (p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1] != T3T_MSG_RSP_STATUS_OK)                           /* verify response status code */
        ||(memcmp (p_cb->peer_nfcid2, &p_t3t_rsp[T3T_MSG_RSP_OFFSET_IDM], NCI_NFCID2_LEN) != 0)  )   /* verify response IDm */
    {
        nfc_status = NFC_STATUS_FAILED;
        GKI_freebuf (p_msg_rsp);
    }
    else if (p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE] != T3T_MSG_OPC_CHECK_RSP)
    {
        RW_TRACE_ERROR2 ("Response error: expecting rsp_code %02X, but got %02X", T3T_MSG_OPC_CHECK_RSP, p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE]);
        nfc_status = NFC_STATUS_FAILED;
        GKI_freebuf (p_msg_rsp);
    }
    else
    {
        /* Copy incoming data into buffer */
        p_msg_rsp->offset += T3T_MSG_RSP_OFFSET_CHECK_DATA;     /* Skip over t3t header */
        p_msg_rsp->len -= T3T_MSG_RSP_OFFSET_CHECK_DATA;
        evt_data.status = NFC_STATUS_OK;
        evt_data.p_data = p_msg_rsp;
        (*(rw_cb.p_cback)) (RW_T3T_CHECK_EVT, (tRW_DATA *) &evt_data);
    }


    p_cb->rw_state = RW_T3T_STATE_IDLE;

    (*(rw_cb.p_cback)) (RW_T3T_CHECK_CPLT_EVT, (tRW_DATA *) &nfc_status);
}

/*****************************************************************************
**
** Function         rw_t3t_act_handle_update_rsp
**
** Description      Handle response to UPDATE command
**
** Returns          Nothing
**
*****************************************************************************/
void rw_t3t_act_handle_update_rsp (tRW_T3T_CB *p_cb, BT_HDR *p_msg_rsp)
{
    UINT8 *p_t3t_rsp = (UINT8 *) (p_msg_rsp+1) + p_msg_rsp->offset;
    tRW_READ_DATA evt_data;

    /* Validate response from tag */
    if (   (p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1] != T3T_MSG_RSP_STATUS_OK)                          /* verify response status code */
        ||(memcmp (p_cb->peer_nfcid2, &p_t3t_rsp[T3T_MSG_RSP_OFFSET_IDM], NCI_NFCID2_LEN) != 0)  )   /* verify response IDm */
    {
        evt_data.status = NFC_STATUS_FAILED;
    }
    else if (p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE] != T3T_MSG_OPC_UPDATE_RSP)
    {
        RW_TRACE_ERROR2 ("Response error: expecting rsp_code %02X, but got %02X", T3T_MSG_OPC_UPDATE_RSP, p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE]);
        evt_data.status = NFC_STATUS_FAILED;
    }
    else
    {
        /* Copy incoming data into buffer */
        evt_data.status = NFC_STATUS_OK;
    }

    p_cb->rw_state = RW_T3T_STATE_IDLE;

    (*(rw_cb.p_cback)) (RW_T3T_UPDATE_CPLT_EVT, (tRW_DATA *)&evt_data);

    GKI_freebuf (p_msg_rsp);
}

/*****************************************************************************
**
** Function         rw_t3t_act_handle_raw_senddata_rsp
**
** Description      Handle response to NDEF detection
**
** Returns          Nothing
**
*****************************************************************************/
void rw_t3t_act_handle_raw_senddata_rsp (tRW_T3T_CB *p_cb, tNFC_DATA_CEVT *p_data)
{
    tRW_READ_DATA evt_data;
    BT_HDR        *p_pkt = p_data->p_data;

#if (BT_TRACE_VERBOSE == TRUE)
        RW_TRACE_DEBUG2 ("RW T3T Raw Frame: Len [0x%X] Status [%s]", p_pkt->len, NFC_GetStatusName (p_data->status));
#else
        RW_TRACE_DEBUG2 ("RW T3T Raw Frame: Len [0x%X] Status [0x%X]", p_pkt->len, p_data->status);
#endif

    /* Copy incoming data into buffer */
    evt_data.status = p_data->status;
    evt_data.p_data = p_pkt;

    p_cb->rw_state = RW_T3T_STATE_IDLE;

    (*(rw_cb.p_cback)) (RW_T3T_RAW_FRAME_EVT, (tRW_DATA *) &evt_data);
}

/*****************************************************************************
**
** Function         rw_t3t_act_handle_check_ndef_rsp
**
** Description      Handle response to NDEF read segment
**
** Returns          Nothing
**
*****************************************************************************/
void rw_t3t_act_handle_check_ndef_rsp (tRW_T3T_CB *p_cb, BT_HDR *p_msg_rsp)
{
    BOOLEAN check_complete = TRUE;
    tNFC_STATUS nfc_status = NFC_STATUS_OK;
    tRW_READ_DATA read_data;
    tRW_DATA evt_data;
    UINT8 *p_t3t_rsp = (UINT8 *) (p_msg_rsp+1) + p_msg_rsp->offset;
    UINT8 rsp_num_bytes_rx;

    /* Validate response from tag */
    if (  (p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1] != T3T_MSG_RSP_STATUS_OK)                      /* verify response status code */
        ||(memcmp (p_cb->peer_nfcid2, &p_t3t_rsp[T3T_MSG_RSP_OFFSET_IDM], NCI_NFCID2_LEN) != 0) /* verify response IDm */
        ||(p_t3t_rsp[T3T_MSG_RSP_OFFSET_NUMBLOCKS] != ((p_cb->ndef_rx_readlen+15) >> 4))  )     /* verify length of response */
    {
        RW_TRACE_ERROR2 ("Response error: bad status, nfcid2, or invalid len: %i %i", p_t3t_rsp[T3T_MSG_RSP_OFFSET_NUMBLOCKS], ((p_cb->ndef_rx_readlen+15)>>4));
        nfc_status = NFC_STATUS_FAILED;
        GKI_freebuf (p_msg_rsp);
    }
    else if (p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE] != T3T_MSG_OPC_CHECK_RSP)
    {
        RW_TRACE_ERROR2 ("Response error: expecting rsp_code %02X, but got %02X", T3T_MSG_OPC_CHECK_RSP, p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE]);
        nfc_status = NFC_STATUS_FAILED;
        GKI_freebuf (p_msg_rsp);
    }
    else
    {
        /* Notify app of NDEF segment received */
        rsp_num_bytes_rx = p_t3t_rsp[T3T_MSG_RSP_OFFSET_NUMBLOCKS] * 16;    /* Number of bytes received, according to header */
        p_cb->ndef_rx_offset += p_cb->ndef_rx_readlen;
        read_data.status = NFC_STATUS_OK;
        p_msg_rsp->offset += T3T_MSG_RSP_OFFSET_CHECK_DATA;     /* Skip over t3t header (point to block data) */
        p_msg_rsp->len -= T3T_MSG_RSP_OFFSET_CHECK_DATA;

        /* Verify that the bytes received is really the amount indicated in the check-response header */
        if (rsp_num_bytes_rx > p_msg_rsp->len)
        {
            RW_TRACE_ERROR2 ("Response error: CHECK rsp header indicates %i bytes, but only received %i bytes", rsp_num_bytes_rx, p_msg_rsp->len);
            nfc_status = NFC_STATUS_FAILED;
            GKI_freebuf (p_msg_rsp);
        }
        else
        {
            /* If this is the the final block, then set len to reflect only valid bytes (do not include padding to 16-byte boundary) */
            if ((p_cb->flags & RW_T3T_FL_IS_FINAL_NDEF_SEGMENT) && (p_cb->ndef_attrib.ln & 0x000F))
            {
                rsp_num_bytes_rx -= (16 - (p_cb->ndef_attrib.ln & 0x000F));
            }

            p_msg_rsp->len = rsp_num_bytes_rx;
            read_data.p_data = p_msg_rsp;
            (*(rw_cb.p_cback)) (RW_T3T_CHECK_EVT, (tRW_DATA *) &read_data);

            /* Send CHECK cmd for next NDEF segment, if needed */
            if (!(p_cb->flags & RW_T3T_FL_IS_FINAL_NDEF_SEGMENT))
            {
                if ((nfc_status = rw_t3t_send_next_ndef_check_cmd (p_cb)) == NFC_STATUS_OK)
                {
                    /* Still getting more segments. Don't send RW_T3T_CHECK_CPLT_EVT yet */
                    check_complete = FALSE;
                }
            }
        }
    }

    /* Notify app of RW_T3T_CHECK_CPLT_EVT if entire NDEF has been read, or if failure */
    if (check_complete)
    {
        p_cb->rw_state = RW_T3T_STATE_IDLE;
        evt_data.status = nfc_status;
        (*(rw_cb.p_cback)) (RW_T3T_CHECK_CPLT_EVT, (tRW_DATA *) &evt_data);
    }
}


/*****************************************************************************
**
** Function         rw_t3t_act_handle_update_ndef_rsp
**
** Description      Handle response to NDEF write segment
**
** Returns          Nothing
**
*****************************************************************************/
void rw_t3t_act_handle_update_ndef_rsp (tRW_T3T_CB *p_cb, BT_HDR *p_msg_rsp)
{
    BOOLEAN update_complete = TRUE;
    tNFC_STATUS nfc_status = NFC_STATUS_OK;
    tRW_DATA evt_data;
    UINT8 *p_t3t_rsp = (UINT8 *) (p_msg_rsp+1) + p_msg_rsp->offset;

    /* Check nfcid2 and status of response */
    if (  (p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1] != T3T_MSG_RSP_STATUS_OK)                           /* verify response status code */
        ||(memcmp (p_cb->peer_nfcid2, &p_t3t_rsp[T3T_MSG_RSP_OFFSET_IDM], NCI_NFCID2_LEN) != 0)  )   /* verify response IDm */
    {
        nfc_status = NFC_STATUS_FAILED;
    }
    /* Validate response opcode */
    else if (p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE] != T3T_MSG_OPC_UPDATE_RSP)
    {
        RW_TRACE_ERROR2 ("Response error: expecting rsp_code %02X, but got %02X", T3T_MSG_OPC_UPDATE_RSP, p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE]);
        nfc_status = NFC_STATUS_FAILED;
    }
    /* If this is response to final UPDATE, then update NDEF local size */
    else if (p_cb->flags & RW_T3T_FL_IS_FINAL_NDEF_SEGMENT)
    {
        /* If successful, update current NDEF size */
        p_cb->ndef_attrib.ln = p_cb->ndef_msg_len;
    }
    /*  If any more NDEF bytes to update, then send next UPDATE command */
    else if (p_cb->ndef_msg_bytes_sent < p_cb->ndef_msg_len)
    {
        /* Send UPDATE command for next segment of NDEF */
        if ((nfc_status = rw_t3t_send_next_ndef_update_cmd (p_cb)) == NFC_STATUS_OK)
        {
            /* Wait for update response */
            update_complete = FALSE;
        }
    }
    /*  Otherwise, no more NDEF bytes. Send final UPDATE for Attribute Information block */
    else
    {
        p_cb->flags |= RW_T3T_FL_IS_FINAL_NDEF_SEGMENT;
        if ((nfc_status = rw_t3t_send_update_ndef_attribute_cmd (p_cb, FALSE)) == NFC_STATUS_OK)
        {
            /* Wait for update response */
            update_complete = FALSE;
        }
    }

    /* If update is completed, then notify app */
    if (update_complete)
    {
        p_cb->rw_state = RW_T3T_STATE_IDLE;
        evt_data.status = nfc_status;
        (*(rw_cb.p_cback)) (RW_T3T_UPDATE_CPLT_EVT, (tRW_DATA *) &evt_data);
    }


    GKI_freebuf (p_msg_rsp);

    return;
}


/*****************************************************************************
**
** Function         rw_t3t_handle_get_sc_poll_rsp
**
** Description      Handle POLL response for getting system codes
**
** Returns          Nothing
**
*****************************************************************************/
static void rw_t3t_handle_get_sc_poll_rsp (tRW_T3T_CB *p_cb, UINT8 nci_status, UINT8 num_responses, UINT8 sensf_res_buf_size, UINT8 *p_sensf_res_buf)
{
    BT_HDR *p_cmd_buf;
    UINT8 *p, *p_cmd_start;
    UINT16 sc;
    tNFC_STATUS status = NFC_STATUS_FAILED;

    /* If waiting for wildcard POLL */
    if (p_cb->rw_substate == RW_T3T_GET_SC_SST_POLL_WILDCARD)
    {
        /* Get the system code from the response */
        if (  (nci_status == NCI_STATUS_OK)
            &&(num_responses > 0)
            &&(sensf_res_buf_size >= (RW_T3T_SENSF_RES_RD_OFFSET + RW_T3T_SENSF_RES_RD_LEN))  )
        {
            p = &p_sensf_res_buf[RW_T3T_SENSF_RES_RD_OFFSET];
            BE_STREAM_TO_UINT16 (sc, p);

            /* Handle felica lite */
            if (sc == T3T_SYSTEM_CODE_FELICA_LITE)
            {
                RW_TRACE_DEBUG1 ("FeliCa Lite tag detected (system code %04X)", sc);
                /* Store system code */
                p_cb->system_codes[p_cb->num_system_codes++] = sc;

                /* Poll for NDEF system code */
                if ((status = (tNFC_STATUS) nci_snd_t3t_polling (T3T_SYSTEM_CODE_NDEF, 0, 0)) == NCI_STATUS_OK)
                {
                    p_cb->rw_substate = RW_T3T_GET_SC_SST_POLL_NDEF;
                    p_cb->cur_poll_rc = 0;
                    p_cb->flags |= RW_T3T_FL_W4_GET_SC_POLL_RSP;

                    /* start timer for waiting for responses */
                    rw_t3t_start_poll_timer (p_cb);
                }
            }
            else
            {
                /* All other types, send REQUEST_SYSTEM_CODE command */
                if ((p_cmd_buf = rw_t3t_get_cmd_buf ()) != NULL)
                {
                    p_cb->rw_substate = RW_T3T_GET_SC_SST_REQUEST_SC;

                    /* Construct T3T message */
                    p_cmd_start = p = (UINT8 *) (p_cmd_buf+1) + p_cmd_buf->offset;
                    UINT8_TO_STREAM (p, T3T_MSG_OPC_REQ_SYSTEMCODE_CMD);
                    ARRAY_TO_STREAM (p, p_cb->peer_nfcid2, NCI_NFCID2_LEN);

                    /* Fill in length field */
                    p_cmd_buf->len = (UINT16) (p - p_cmd_start);

                    /* Send the T3T message */
                    status = rw_t3t_send_cmd (p_cb, RW_T3T_CMD_GET_SYSTEM_CODES, p_cmd_buf, RW_T3T_DEFAULT_CMD_TIMEOUT_TICKS);
                }
            }
        }

        /* Error proceeding. Notify upper layer of system codes found so far */
        if (status != NFC_STATUS_OK)
        {
            rw_t3t_handle_get_system_codes_cplt ();
        }
    }
    /* If waiting for NDEF POLL */
    else if (p_cb->rw_substate == RW_T3T_GET_SC_SST_POLL_NDEF)
    {
        /* Validate response for NDEF poll */
        if ((nci_status == NCI_STATUS_OK) && (num_responses > 0))
        {
            /* Tag responded for NDEF poll */
            p_cb->system_codes[p_cb->num_system_codes++] = T3T_SYSTEM_CODE_NDEF;
        }
        rw_t3t_handle_get_system_codes_cplt ();
    }
}

/*****************************************************************************
**
** Function         rw_t3t_handle_ndef_detect_poll_rsp
**
** Description      Handle POLL response for getting system codes
**
** Returns          Nothing
**
*****************************************************************************/
static void rw_t3t_handle_ndef_detect_poll_rsp (tRW_T3T_CB *p_cb, UINT8 nci_status, UINT8 num_responses, UINT8 sensf_res_buf_size, UINT8 *p_sensf_res_buf)
{
    BT_HDR *p_cmd_buf;
    UINT8 *p, *p_cmd_start;
    tRW_DATA evt_data;

    /* Validate response for NDEF poll */
    if ((nci_status == NCI_STATUS_OK) && (num_responses > 0))
    {
        /* Tag responded for NDEF poll */

        /* Read NDEF attribute block */
        if ((p_cmd_buf = rw_t3t_get_cmd_buf ()) != NULL)
        {
            /* Construct T3T message */
            p = p_cmd_start = (UINT8 *) (p_cmd_buf+1) + p_cmd_buf->offset;

            /* Add CHECK opcode to message  */
            UINT8_TO_STREAM (p, T3T_MSG_OPC_CHECK_CMD);

            /* Add IDm to message */
            ARRAY_TO_STREAM (p, p_cb->peer_nfcid2, NCI_NFCID2_LEN);

            /* Add Service code list */
            UINT8_TO_STREAM (p, 1);                       /* Number of services (only 1 service: NDEF) */
            UINT16_TO_STREAM (p, T3T_MSG_NDEF_SC_RO);     /* Service code (little-endian format) */

            /* Number of blocks */
            UINT8_TO_STREAM (p, 1);                       /* Number of blocks (only 1 block: NDEF Attribute Information ) */

            /* Block List element: the NDEF attribute information block (block 0) */
            UINT8_TO_STREAM (p, T3T_MSG_MASK_TWO_BYTE_BLOCK_DESC_FORMAT);
            UINT8_TO_STREAM (p, 0);

            /* Calculate length of message */
            p_cmd_buf->len = (UINT16) (p - p_cmd_start);

            /* Send the T3T message */
            if ((evt_data.status = rw_t3t_send_cmd (p_cb, RW_T3T_CMD_DETECT_NDEF, p_cmd_buf, rw_t3t_check_timeout(1))) == NFC_STATUS_OK)
            {
                /* CHECK command sent. Wait for response */
                return;
            }
        }
        nci_status = NFC_STATUS_FAILED;
    }

    /* NDEF detection failed */
    p_cb->rw_state = RW_T3T_STATE_IDLE;
    evt_data.ndef.status = nci_status;
    evt_data.ndef.flags  = RW_NDEF_FL_UNKNOWN;
    rw_t3t_update_ndef_flag (&evt_data.ndef.flags);
    (*(rw_cb.p_cback)) (RW_T3T_NDEF_DETECT_EVT, &evt_data);
}


/*****************************************************************************
**
** Function         rw_t3t_act_handle_get_sc_rsp
**
** Description      Handle response for getting system codes
**
** Returns          Nothing
**
*****************************************************************************/
void rw_t3t_act_handle_get_sc_rsp (tRW_T3T_CB *p_cb, BT_HDR *p_msg_rsp)
{
    UINT8 *p_t3t_rsp = (UINT8 *) (p_msg_rsp+1) + p_msg_rsp->offset;
    UINT8 *p;
    UINT16 sc;
    UINT8 num_sc, i;

    /* Validate response opcode */
    if (p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE] != T3T_MSG_OPC_REQ_SYSTEMCODE_RSP)
    {
        RW_TRACE_ERROR2 ("Response error: expecting rsp_code %02X, but got %02X", T3T_MSG_OPC_REQ_SYSTEMCODE_RSP, p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE]);
    }
    else
    {
        /* Point to number of systems parameter */
        p = &p_t3t_rsp[T3T_MSG_RSP_OFFSET_NUMSYS];
        STREAM_TO_UINT8 (num_sc, p);

        /* Validate maximum */
        if (num_sc>T3T_MAX_SYSTEM_CODES)
        {
            RW_TRACE_DEBUG2 ("Tag's number of systems (%i) exceeds NFA max (%i)", num_sc, T3T_MAX_SYSTEM_CODES);
            num_sc = T3T_MAX_SYSTEM_CODES;
        }

        for (i = 0; i < num_sc; i++)
        {
            BE_STREAM_TO_UINT16 (sc, p);
            p_cb->system_codes[p_cb->num_system_codes++] = sc;
        }
    }
    rw_t3t_handle_get_system_codes_cplt ();

    GKI_freebuf (p_msg_rsp);
}

/*****************************************************************************
**
** Function         rw_t3t_update_block
**
** Description      Send UPDATE command for single block
**                  (for formatting/configuring read only)
**
** Returns          tNFC_STATUS
**
*****************************************************************************/
tNFC_STATUS rw_t3t_update_block (tRW_T3T_CB *p_cb, UINT8 block_id, UINT8 *p_block_data)
{
    UINT8 *p_dst, *p_cmd_start;
    BT_HDR *p_cmd_buf;
    tNFC_STATUS status;

    if ((p_cmd_buf = rw_t3t_get_cmd_buf ()) != NULL)
    {
        p_dst = p_cmd_start = (UINT8 *) (p_cmd_buf+1) + p_cmd_buf->offset;

        /* Add UPDATE opcode to message  */
        UINT8_TO_STREAM (p_dst, T3T_MSG_OPC_UPDATE_CMD);

        /* Add IDm to message */
        ARRAY_TO_STREAM (p_dst, p_cb->peer_nfcid2, NCI_NFCID2_LEN);

        /* Add Service code list */
        UINT8_TO_STREAM (p_dst, 1);                      /* Number of services (only 1 service: NDEF) */
        UINT16_TO_STREAM (p_dst, T3T_MSG_NDEF_SC_RW);    /* Service code (little-endian format) */

        /* Number of blocks */
        UINT8_TO_STREAM (p_dst, 1);

        /* Add Block list element for MC */
        UINT8_TO_STREAM (p_dst, T3T_MSG_MASK_TWO_BYTE_BLOCK_DESC_FORMAT);
        UINT8_TO_STREAM (p_dst, block_id);

        /* Copy MC data to UPDATE message */
        ARRAY_TO_STREAM (p_dst, p_block_data, T3T_MSG_BLOCKSIZE);

        /* Calculate length of message */
        p_cmd_buf->len = (UINT16) (p_dst - p_cmd_start);

        /* Send the T3T message */
        status = rw_t3t_send_cmd (p_cb, p_cb->cur_cmd, p_cmd_buf, rw_t3t_update_timeout(1));
    }
    else
    {
        /* Unable to send UPDATE command */
        status = NFC_STATUS_NO_BUFFERS;
    }

    return (status);
}

/*****************************************************************************
**
** Function         rw_t3t_handle_fmt_poll_rsp
**
** Description      Handle POLL response for formatting felica-lite
**
** Returns          Nothing
**
*****************************************************************************/
static void rw_t3t_handle_fmt_poll_rsp (tRW_T3T_CB *p_cb, UINT8 nci_status, UINT8 num_responses, UINT8 sensf_res_buf_size, UINT8 *p_sensf_res_buf)
{
    tRW_DATA evt_data;

    evt_data.status = NFC_STATUS_OK;

    /* Validate response for poll response */
    if ((nci_status == NCI_STATUS_OK) && (num_responses > 0))
    {
        /* Tag responded for Felica-Lite poll */
        /* Get MemoryControl block */
        RW_TRACE_DEBUG0 ("Felica-Lite tag detected...getting Memory Control block.");

        p_cb->rw_substate = RW_T3T_FMT_SST_CHECK_MC_BLK;

        /* Send command to check Memory Configuration block */
        evt_data.status = rw_t3t_check_mc_block (p_cb);
    }
    else
    {
        RW_TRACE_ERROR0 ("Felica-Lite tag not detected");
        evt_data.status = NFC_STATUS_FAILED;
    }

    /* If error, notify upper layer */
    if (evt_data.status != NFC_STATUS_OK)
    {
        rw_t3t_format_cplt (evt_data.status);
    }
}

/*****************************************************************************
**
** Function         rw_t3t_act_handle_fmt_rsp
**
** Description      Handle response for formatting codes
**
** Returns          Nothing
**
*****************************************************************************/
void rw_t3t_act_handle_fmt_rsp (tRW_T3T_CB *p_cb, BT_HDR *p_msg_rsp)
{
    UINT8 *p_t3t_rsp = (UINT8 *) (p_msg_rsp+1) + p_msg_rsp->offset;
    UINT8 *p_mc;
    tRW_DATA evt_data;

    evt_data.status = NFC_STATUS_OK;

    /* Check tags's response for reading MemoryControl block */
    if (p_cb->rw_substate == RW_T3T_FMT_SST_CHECK_MC_BLK)
    {
        /* Validate response opcode */
        if (p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE] != T3T_MSG_OPC_CHECK_RSP)
        {
            RW_TRACE_ERROR2 ("Response error: expecting rsp_code %02X, but got %02X", T3T_MSG_OPC_CHECK_RSP, p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE]);
            evt_data.status = NFC_STATUS_FAILED;
        }
        /* Validate status code and NFCID2 response from tag */
        else if (  (p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1] != T3T_MSG_RSP_STATUS_OK)                           /* verify response status code */
                 ||(memcmp (p_cb->peer_nfcid2, &p_t3t_rsp[T3T_MSG_RSP_OFFSET_IDM], NCI_NFCID2_LEN) != 0)  )   /* verify response IDm */
        {
            evt_data.status = NFC_STATUS_FAILED;
        }
        else
        {
            /* Check if memory configuration (MC) block to see if SYS_OP=1 (NDEF enabled) */
            p_mc = &p_t3t_rsp[T3T_MSG_RSP_OFFSET_CHECK_DATA];  /* Point to MC data of CHECK response */

            if (p_mc[T3T_MSG_FELICALITE_MC_OFFSET_SYS_OP] != 0x01)
            {
                /* Tag is not currently enabled for NDEF. Indicate that we need to update the MC block */

                /* Set SYS_OP field to 0x01 (enable NDEF) */
                p_mc[T3T_MSG_FELICALITE_MC_OFFSET_SYS_OP] = 0x01;

                /* Set RF_PRM field to 0x07 (procedure of issuance) */
                p_mc[T3T_MSG_FELICALITE_MC_OFFSET_RF_PRM] = 0x07;

                /* Construct and send UPDATE message to write MC block */
                p_cb->rw_substate = RW_T3T_FMT_SST_UPDATE_MC_BLK;
                evt_data.status = rw_t3t_update_block (p_cb, T3T_MSG_FELICALITE_BLOCK_ID_MC, p_mc);
            }
            else
            {
                /* SYS_OP=1: ndef already enabled. Just need to update attribute information block */
                p_cb->rw_substate = RW_T3T_FMT_SST_UPDATE_NDEF_ATTRIB;
                evt_data.status = rw_t3t_update_block (p_cb, 0, (UINT8 *) rw_t3t_default_attrib_info);
            }
        }

        /* If error, notify upper layer */
        if (evt_data.status != NFC_STATUS_OK)
        {
            rw_t3t_format_cplt (evt_data.status);
        }
    }
    else if (p_cb->rw_substate == RW_T3T_FMT_SST_UPDATE_MC_BLK)
    {
        /* Validate response opcode */
        if (  (p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE] != T3T_MSG_OPC_UPDATE_RSP)
            ||(p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1] != T3T_MSG_RSP_STATUS_OK)  )

        {
            RW_TRACE_ERROR2 ("Response error: rsp_code=%02X, status=%02X", p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE], p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1]);
            evt_data.status = NFC_STATUS_FAILED;
        }
        else
        {
            /* SYS_OP=1: ndef already enabled. Just need to update attribute information block */
            p_cb->rw_substate = RW_T3T_FMT_SST_UPDATE_NDEF_ATTRIB;
            evt_data.status = rw_t3t_update_block (p_cb, 0, (UINT8 *) rw_t3t_default_attrib_info);
        }

        /* If error, notify upper layer */
        if (evt_data.status != NFC_STATUS_OK)
        {
            rw_t3t_format_cplt (evt_data.status);
        }
    }
    else if (p_cb->rw_substate == RW_T3T_FMT_SST_UPDATE_NDEF_ATTRIB)
    {
        /* Validate response opcode */
        if (  (p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE] != T3T_MSG_OPC_UPDATE_RSP)
            ||(p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1] != T3T_MSG_RSP_STATUS_OK)  )

        {
            RW_TRACE_ERROR2 ("Response error: rsp_code=%02X, status=%02X", p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE], p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1]);
            evt_data.status = NFC_STATUS_FAILED;
        }


        rw_t3t_format_cplt (evt_data.status);
    }

    GKI_freebuf (p_msg_rsp);
}

/*****************************************************************************
**
** Function         rw_t3t_handle_sro_poll_rsp
**
** Description      Handle POLL response for configuring felica-lite read only
**
** Returns          Nothing
**
*****************************************************************************/
static void rw_t3t_handle_sro_poll_rsp (tRW_T3T_CB *p_cb, UINT8 nci_status, UINT8 num_responses, UINT8 sensf_res_buf_size, UINT8 *p_sensf_res_buf)
{
    tRW_DATA evt_data;
    UINT8 rw_t3t_ndef_attrib_info[T3T_MSG_BLOCKSIZE];
    UINT8 *p;
    UINT8 tempU8;
    UINT16 checksum, i;
    UINT32 tempU32 = 0;

    evt_data.status = NFC_STATUS_OK;

    /* Validate response for poll response */
    if ((nci_status == NCI_STATUS_OK) && (num_responses > 0))
    {
        /* Tag responded for Felica-Lite poll */
        if (p_cb->ndef_attrib.rwflag != T3T_MSG_NDEF_RWFLAG_RO)
        {
            /* First update attribute information block */
            RW_TRACE_DEBUG0 ("Felica-Lite tag detected...update NDef attribution block.");

            p_cb->rw_substate = RW_T3T_SRO_SST_UPDATE_NDEF_ATTRIB;

            p = rw_t3t_ndef_attrib_info;

            UINT8_TO_STREAM (p, p_cb->ndef_attrib.version);

            /* Update NDEF info */
            UINT8_TO_STREAM (p, p_cb->ndef_attrib.nbr);              /* NBr: number of blocks that can be read using one Check command */
            UINT8_TO_STREAM (p, p_cb->ndef_attrib.nbw);              /* Nbw: number of blocks that can be written using one Update command */
            UINT16_TO_BE_STREAM (p, p_cb->ndef_attrib.nmaxb);        /* Nmaxb: maximum number of blocks available for NDEF data */
            UINT32_TO_BE_STREAM (p, tempU32);
            UINT8_TO_STREAM (p, p_cb->ndef_attrib.writef);           /* WriteFlag: 00h if writing data finished; 0Fh if writing data in progress */
            UINT8_TO_STREAM (p, 0x00);                               /* RWFlag: 00h NDEF is read-only */

            tempU8 = (UINT8) (p_cb->ndef_attrib.ln >> 16);
            /* Get length (3-byte, big-endian) */
            UINT8_TO_STREAM (p, tempU8);                               /* Ln: high-byte */
            UINT16_TO_BE_STREAM (p, p_cb->ndef_attrib.ln);           /* Ln: lo-word */

            /* Calculate and append Checksum */
            checksum = 0;
            for (i = 0; i < T3T_MSG_NDEF_ATTR_INFO_SIZE; i++)
            {
                checksum+=rw_t3t_ndef_attrib_info[i];
            }
            UINT16_TO_BE_STREAM (p, checksum);

            evt_data.status = rw_t3t_update_block (p_cb, 0, (UINT8 *) rw_t3t_ndef_attrib_info);
        }
        else if (p_cb->cur_cmd == RW_T3T_CMD_SET_READ_ONLY_HARD)
        {
            /* NDEF is already read only, Read and update MemoryControl block */
            RW_TRACE_DEBUG0 ("Felica-Lite tag detected...getting Memory Control block.");
            p_cb->rw_substate = RW_T3T_SRO_SST_CHECK_MC_BLK;

            /* Send command to check Memory Configuration block */
            evt_data.status = rw_t3t_check_mc_block (p_cb);
        }
    }
    else
    {
        RW_TRACE_ERROR0 ("Felica-Lite tag not detected");
        evt_data.status = NFC_STATUS_FAILED;
    }

    /* If error, notify upper layer */
    if (evt_data.status != NFC_STATUS_OK)
    {
        rw_t3t_set_readonly_cplt (evt_data.status);
    }
}

/*****************************************************************************
**
** Function         rw_t3t_act_handle_sro_rsp
**
** Description      Handle response for setting read only codes
**
** Returns          Nothing
**
*****************************************************************************/
void rw_t3t_act_handle_sro_rsp (tRW_T3T_CB *p_cb, BT_HDR *p_msg_rsp)
{
    UINT8 *p_t3t_rsp = (UINT8 *) (p_msg_rsp+1) + p_msg_rsp->offset;
    UINT8 *p_mc;
    tRW_DATA evt_data;

    evt_data.status = NFC_STATUS_OK;

    if (p_cb->rw_substate == RW_T3T_SRO_SST_UPDATE_NDEF_ATTRIB)
    {
        /* Validate response opcode */
        if (  (p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE] != T3T_MSG_OPC_UPDATE_RSP)
            ||(p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1] != T3T_MSG_RSP_STATUS_OK)  )

        {
            RW_TRACE_ERROR2 ("Response error: rsp_code=%02X, status=%02X", p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE], p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1]);
            evt_data.status = NFC_STATUS_FAILED;
        }
        else
        {
            p_cb->ndef_attrib.rwflag = T3T_MSG_NDEF_RWFLAG_RO;
            if (p_cb->cur_cmd == RW_T3T_CMD_SET_READ_ONLY_HARD)
            {
                p_cb->rw_substate = RW_T3T_SRO_SST_CHECK_MC_BLK;

                /* Send command to check Memory Configuration block */
                evt_data.status = rw_t3t_check_mc_block (p_cb);
            }
            else
            {
                rw_t3t_set_readonly_cplt (evt_data.status);
            }
        }
    }
    else if (p_cb->rw_substate == RW_T3T_SRO_SST_CHECK_MC_BLK)
    {
        /* Check tags's response for reading MemoryControl block, Validate response opcode */
        if (p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE] != T3T_MSG_OPC_CHECK_RSP)
        {
            RW_TRACE_ERROR2 ("Response error: expecting rsp_code %02X, but got %02X", T3T_MSG_OPC_CHECK_RSP, p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE]);
            evt_data.status = NFC_STATUS_FAILED;
        }
        /* Validate status code and NFCID2 response from tag */
        else if (  (p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1] != T3T_MSG_RSP_STATUS_OK)                           /* verify response status code */
                 ||(memcmp (p_cb->peer_nfcid2, &p_t3t_rsp[T3T_MSG_RSP_OFFSET_IDM], NCI_NFCID2_LEN) != 0)  )   /* verify response IDm */
        {
            evt_data.status = NFC_STATUS_FAILED;
        }
        else
        {
            /* Check if memory configuration (MC) block to see if SYS_OP=1 (NDEF enabled) */
            p_mc = &p_t3t_rsp[T3T_MSG_RSP_OFFSET_CHECK_DATA];  /* Point to MC data of CHECK response */

            if (p_mc[T3T_MSG_FELICALITE_MC_OFFSET_SYS_OP] != 0x01)
            {
                /* Tag is not currently enabled for NDEF */
                evt_data.status = NFC_STATUS_FAILED;
            }
            else
            {
                /* Set MC_SP field with MC[0] = 0x00 & MC[1] = 0xC0 (Hardlock) to change access permission from RW to RO */
                p_mc[T3T_MSG_FELICALITE_MC_OFFSET_MC_SP]     = 0x00;
                /* Not changing the access permission of Subtraction Register and MC[0:1] */
                p_mc[T3T_MSG_FELICALITE_MC_OFFSET_MC_SP + 1] = 0xC0;

               /* Set RF_PRM field to 0x07 (procedure of issuance) */
                p_mc[T3T_MSG_FELICALITE_MC_OFFSET_RF_PRM] = 0x07;

                /* Construct and send UPDATE message to write MC block */
                p_cb->rw_substate = RW_T3T_SRO_SST_UPDATE_MC_BLK;
                evt_data.status = rw_t3t_update_block (p_cb, T3T_MSG_FELICALITE_BLOCK_ID_MC, p_mc);
            }
        }
    }
    else if (p_cb->rw_substate == RW_T3T_SRO_SST_UPDATE_MC_BLK)
    {
        /* Validate response opcode */
        if (  (p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE] != T3T_MSG_OPC_UPDATE_RSP)
            ||(p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1] != T3T_MSG_RSP_STATUS_OK)  )

        {
            RW_TRACE_ERROR2 ("Response error: rsp_code=%02X, status=%02X", p_t3t_rsp[T3T_MSG_RSP_OFFSET_RSPCODE], p_t3t_rsp[T3T_MSG_RSP_OFFSET_STATUS1]);
            evt_data.status = NFC_STATUS_FAILED;
        }
        else
        {
            rw_t3t_set_readonly_cplt (evt_data.status);
        }
    }

    /* If error, notify upper layer */
    if (evt_data.status != NFC_STATUS_OK)
    {
        rw_t3t_set_readonly_cplt (evt_data.status);
    }

    GKI_freebuf (p_msg_rsp);
}

/*******************************************************************************
**
** Function         rw_t3t_data_cback
**
** Description      This callback function receives the data from NFCC.
**
** Returns          none
**
*******************************************************************************/
void rw_t3t_data_cback (UINT8 conn_id, tNFC_DATA_CEVT *p_data)
{
    tRW_T3T_CB *p_cb  = &rw_cb.tcb.t3t;
    BT_HDR     *p_msg = p_data->p_data;
    BOOLEAN free_msg = FALSE;           /* if TRUE, free msg buffer before returning */
    UINT8 *p, sod;

    /* Stop rsponse timer */
    nfc_stop_quick_timer (&p_cb->timer);

#if (defined (RW_STATS_INCLUDED) && (RW_STATS_INCLUDED == TRUE))
    /* Update rx stats */
    rw_main_update_rx_stats (p_msg->len);
#endif  /* RW_STATS_INCLUDED */

    /* Check if we are expecting a response */
    if (p_cb->rw_state != RW_T3T_STATE_COMMAND_PENDING)
    {
        /*
        **  This must be raw frame response
        **  send raw frame to app with SoD
        */
        rw_t3t_act_handle_raw_senddata_rsp (p_cb, p_data);
    }
    /* Sanity check: verify msg len is big enough to contain t3t header */
    else if (p_msg->len < T3T_MSG_RSP_COMMON_HDR_LEN)
    {
        RW_TRACE_ERROR1 ("T3T: invalid Type3 Tag Message (invalid len: %i)", p_msg->len);
        free_msg = TRUE;

        rw_t3t_process_frame_error ();
    }
    else
    {
        /* Check for RF frame error */
        p = (UINT8 *) (p_msg+1) + p_msg->offset;
        sod = p[0];
        if (p[sod] != NCI_STATUS_OK)
        {
            RW_TRACE_ERROR1 ("T3T: rf frame error (crc status=%i)", p[sod]);
            GKI_freebuf (p_msg);

            rw_t3t_process_frame_error ();
            return;
        }

#if (BT_TRACE_PROTOCOL == TRUE)
        DispT3TagMessage (p_msg, TRUE);
#endif

        /* Skip over SoD */
        p_msg->offset++;
        p_msg->len--;

        /* Get response code */
        switch (p_cb->cur_cmd)
        {
            case RW_T3T_CMD_DETECT_NDEF:
                rw_t3t_act_handle_ndef_detect_rsp (p_cb, p_msg);
                break;

            case RW_T3T_CMD_CHECK_NDEF:
                rw_t3t_act_handle_check_ndef_rsp (p_cb, p_msg);
                break;

            case RW_T3T_CMD_UPDATE_NDEF:
                rw_t3t_act_handle_update_ndef_rsp (p_cb, p_msg);
                break;

            case RW_T3T_CMD_CHECK:
                rw_t3t_act_handle_check_rsp (p_cb, p_msg);
                break;

            case RW_T3T_CMD_UPDATE:
                rw_t3t_act_handle_update_rsp (p_cb, p_msg);
                break;

            case RW_T3T_CMD_SEND_RAW_FRAME:
                rw_t3t_act_handle_raw_senddata_rsp (p_cb, p_data);
                break;

            case RW_T3T_CMD_GET_SYSTEM_CODES:
                rw_t3t_act_handle_get_sc_rsp (p_cb, p_msg);
                break;

            case RW_T3T_CMD_FORMAT:
                rw_t3t_act_handle_fmt_rsp (p_cb, p_msg);
                break;

            case RW_T3T_CMD_SET_READ_ONLY_SOFT:
            case RW_T3T_CMD_SET_READ_ONLY_HARD:
                rw_t3t_act_handle_sro_rsp (p_cb, p_msg);
                break;

            default:
                GKI_freebuf (p_msg);
                break;
        }
    }

    if (free_msg)
    {
        GKI_freebuf (p_msg);
    }
}


/*******************************************************************************
**
** Function         rw_t3t_conn_cback
**
** Description      This callback function receives the events/data from NFCC.
**
** Returns          none
**
*******************************************************************************/
void rw_t3t_conn_cback (UINT8 conn_id, tNFC_CONN_EVT event, tNFC_CONN *p_data)
{
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;
    RW_TRACE_DEBUG2 ("rw_t3t_conn_cback: conn_id=%i, evt=0x%02x", conn_id, event);

    /* Only handle NFC_RF_CONN_ID conn_id */
    if (conn_id != NFC_RF_CONN_ID)
    {
        return;
    }

    switch (event)
    {
    case NFC_DEACTIVATE_CEVT:
        rw_t3t_unselect (NULL);
        break;

    case NFC_DATA_CEVT:     /* check for status in tNFC_CONN */
        if (  (p_data->data.status == NFC_STATUS_OK)
            ||(p_data->data.status == NFC_STATUS_CONTINUE)  )
        {
            rw_t3t_data_cback (conn_id, &(p_data->data));
            break;
        }
        /* Data event with error status...fall through to NFC_ERROR_CEVT case */


    case NFC_ERROR_CEVT:
        nfc_stop_quick_timer (&p_cb->timer);

#if (defined (RW_STATS_INCLUDED) && (RW_STATS_INCLUDED == TRUE))
        rw_main_update_trans_error_stats ();
#endif  /* RW_STATS_INCLUDED */

        if (event == NFC_ERROR_CEVT)
            rw_t3t_process_error (NFC_STATUS_TIMEOUT);
        else
            rw_t3t_process_error (p_data->status);
        break;

    default:
        break;

    }
}


/*******************************************************************************
**
** Function         rw_t3t_mrti_to_a_b
**
** Description      Converts the given MRTI (Maximum Response Time Information)
**                  to the base to calculate timeout value.
**                  (The timeout value is a + b * number_blocks)
**
** Returns          NFC_STATUS_OK
**
*******************************************************************************/
static void rw_t3t_mrti_to_a_b (UINT8 mrti, UINT32 *p_a, UINT32 *p_b)
{
    UINT8 a, b, e;

    a = (mrti & 0x7) + 1;   /* A is bit 0 ~ bit 2 */
    mrti >>=3;
    b = (mrti & 0x7) + 1;   /* B is bit 3 ~ bit 5 */
    mrti >>=3;
    e = mrti & 0x3;         /* E is bit 6 ~ bit 7 */
    *p_a = rw_t3t_mrti_base[e] * a; /* (A+1) * base (i.e T/t3t * 4^E) */
    *p_b = rw_t3t_mrti_base[e] * b; /* (B+1) * base (i.e T/t3t * 4^E) */
}


/*******************************************************************************
**
** Function         rw_t3t_select
**
** Description      Called by NFC manager when a Type3 tag has been activated
**
** Returns          NFC_STATUS_OK
**
*******************************************************************************/
tNFC_STATUS rw_t3t_select (UINT8 peer_nfcid2[NCI_RF_F_UID_LEN], UINT8 mrti_check, UINT8 mrti_update)
{
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;

    RW_TRACE_API0 ("rw_t3t_select");

    memcpy (p_cb->peer_nfcid2, peer_nfcid2, NCI_NFCID2_LEN); /* Store tag's NFCID2 */
    p_cb->ndef_attrib.status = NFC_STATUS_NOT_INITIALIZED;  /* Indicate that NDEF detection has not been performed yet */
    p_cb->rw_state = RW_T3T_STATE_IDLE;
    p_cb->flags = 0;
    rw_t3t_mrti_to_a_b (mrti_check, &p_cb->check_tout_a, &p_cb->check_tout_b);
    rw_t3t_mrti_to_a_b (mrti_update, &p_cb->update_tout_a, &p_cb->update_tout_b);

    /* Alloc cmd buf for retransmissions */
    if (p_cb->p_cur_cmd_buf ==  NULL)
    {
        if ((p_cb->p_cur_cmd_buf = (BT_HDR *) GKI_getpoolbuf (NFC_RW_POOL_ID)) == NULL)
        {
            RW_TRACE_ERROR0 ("rw_t3t_select: unable to allocate buffer for retransmission");
            p_cb->rw_state = RW_T3T_STATE_NOT_ACTIVATED;
            return (NFC_STATUS_FAILED);
        }
    }


    NFC_SetStaticRfCback (rw_t3t_conn_cback);

    return NFC_STATUS_OK;
}


/*******************************************************************************
**
** Function         rw_t3t_unselect
**
** Description      Called by NFC manager when a Type3 tag has been de-activated
**
** Returns          NFC_STATUS_OK
**
*******************************************************************************/
static tNFC_STATUS rw_t3t_unselect (UINT8 peer_nfcid2[])
{
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;

#if (defined (RW_STATS_INCLUDED) && (RW_STATS_INCLUDED == TRUE))
    /* Display stats */
    rw_main_log_stats ();
#endif  /* RW_STATS_INCLUDED */

    /* Stop t3t timer (if started) */
    nfc_stop_quick_timer (&p_cb->timer);

    /* Free cmd buf for retransmissions */
    if (p_cb->p_cur_cmd_buf)
    {
        GKI_freebuf (p_cb->p_cur_cmd_buf);
        p_cb->p_cur_cmd_buf = NULL;
    }

    p_cb->rw_state = RW_T3T_STATE_NOT_ACTIVATED;
    NFC_SetStaticRfCback (NULL);

    return NFC_STATUS_OK;
}

/*******************************************************************************
**
** Function         rw_t3t_update_ndef_flag
**
** Description      set additional NDEF Flags for felica lite tag
**
** Returns          updated NDEF Flag value
**
*******************************************************************************/
static void rw_t3t_update_ndef_flag (UINT8 *p_flag)
{
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;
    UINT8 xx;

    for (xx = 0; xx < p_cb->num_system_codes; xx++)
    {
        if (p_cb->system_codes[xx] == T3T_SYSTEM_CODE_FELICA_LITE)
        {
            *p_flag &= ~RW_NDEF_FL_UNKNOWN;
            *p_flag |= (RW_NDEF_FL_SUPPORTED | RW_NDEF_FL_FORMATABLE);
            break;
        }
    }
}

#if (BT_TRACE_VERBOSE == TRUE)
/*******************************************************************************
**
** Function         rw_t3t_cmd_str
**
** Description      Converts cmd_id to command string for logging
**
** Returns          command string
**
*******************************************************************************/
static char *rw_t3t_cmd_str (UINT8 cmd_id)
{
    switch (cmd_id)
    {
    case RW_T3T_CMD_DETECT_NDEF:
        return "RW_T3T_CMD_DETECT_NDEF";

    case RW_T3T_CMD_CHECK_NDEF:
        return "RW_T3T_CMD_CHECK_NDEF";

    case RW_T3T_CMD_UPDATE_NDEF:
        return "RW_T3T_CMD_UPDATE_NDEF";

    case RW_T3T_CMD_CHECK:
        return "RW_T3T_CMD_CHECK";

    case RW_T3T_CMD_UPDATE:
        return "RW_T3T_CMD_UPDATE";

    case RW_T3T_CMD_SEND_RAW_FRAME:
        return "RW_T3T_CMD_SEND_RAW_FRAME";

    case RW_T3T_CMD_GET_SYSTEM_CODES:
        return "RW_T3T_CMD_GET_SYSTEM_CODES";

    default:
        return "Unknown";
    }
}


/*******************************************************************************
**
** Function         rw_t3t_state_str
**
** Description      Converts state_id to command string for logging
**
** Returns          command string
**
*******************************************************************************/
static char *rw_t3t_state_str (UINT8 state_id)
{
    switch (state_id)
    {
    case RW_T3T_STATE_NOT_ACTIVATED:
        return "RW_T3T_STATE_NOT_ACTIVATED";

    case RW_T3T_STATE_IDLE:
        return "RW_T3T_STATE_IDLE";

    case RW_T3T_STATE_COMMAND_PENDING:
        return "RW_T3T_STATE_COMMAND_PENDING";

    default:
        return "Unknown";
    }
}
#endif

/*****************************************************************************
**  Type3 Tag API Functions
*****************************************************************************/


/*****************************************************************************
**
** Function         RW_T3tDetectNDef
**
** Description
**      This function is used to perform NDEF detection on a Type 3 tag, and
**      retrieve the tag's NDEF attribute information (block 0).
**
**      Before using this API, the application must call RW_SelectTagType to
**      indicate that a Type 3 tag has been activated, and to provide the
**      tag's Manufacture ID (IDm) .
**
** Returns
**      NFC_STATUS_OK: ndef detection procedure started
**      NFC_STATUS_NO_BUFFERS: unable to allocate a buffer for this operation
**      NFC_STATUS_FAILED: other error
**
*****************************************************************************/
tNFC_STATUS RW_T3tDetectNDef (void)
{
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;
    tNFC_STATUS retval = NFC_STATUS_OK;

    RW_TRACE_API0 ("RW_T3tDetectNDef");

    /* Check if we are in valid state to handle this API */
    if (p_cb->rw_state != RW_T3T_STATE_IDLE)
    {
        RW_TRACE_ERROR1 ("Error: invalid state to handle API (0x%x)", p_cb->rw_state);
        return (NFC_STATUS_FAILED);
    }

    if ((retval = (tNFC_STATUS) nci_snd_t3t_polling (T3T_SYSTEM_CODE_NDEF, 0, 0)) == NCI_STATUS_OK)
    {
        p_cb->cur_cmd = RW_T3T_CMD_DETECT_NDEF;
        p_cb->cur_tout = RW_T3T_DEFAULT_CMD_TIMEOUT_TICKS;
        p_cb->cur_poll_rc = 0;
        p_cb->rw_state = RW_T3T_STATE_COMMAND_PENDING;
        p_cb->flags |= RW_T3T_FL_W4_NDEF_DETECT_POLL_RSP;

        /* start timer for waiting for responses */
        rw_t3t_start_poll_timer (p_cb);
    }

    return (retval);
}


/*****************************************************************************
**
** Function         RW_T3tCheckNDef
**
** Description
**      Retrieve NDEF contents from a Type3 tag.
**
**      The RW_T3T_CHECK_EVT event is used to notify the application for each
**      segment of NDEF data received. The RW_T3T_CHECK_CPLT_EVT event is used to
**      notify the application all segments have been received.
**
**      Before using this API, the RW_T3tDetectNDef function must be called to
**      verify that the tag contains NDEF data, and to retrieve the NDEF
**      attributes.
**
**      Internally, this command will be separated into multiple Tag 3 Check
**      commands (if necessary) - depending on the tag's Nbr (max number of
**      blocks per read) attribute.
**
** Returns
**      NFC_STATUS_OK: check command started
**      NFC_STATUS_NO_BUFFERS: unable to allocate a buffer for this operation
**      NFC_STATUS_FAILED: other error
**
*****************************************************************************/
tNFC_STATUS RW_T3tCheckNDef (void)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;

    RW_TRACE_API0 ("RW_T3tCheckNDef");

    /* Check if we are in valid state to handle this API */
    if (p_cb->rw_state != RW_T3T_STATE_IDLE)
    {
        RW_TRACE_ERROR1 ("Error: invalid state to handle API (0x%x)", p_cb->rw_state);
        return (NFC_STATUS_FAILED);
    }
    else if (p_cb->ndef_attrib.status != NFC_STATUS_OK)       /* NDEF detection not performed yet? */
    {
        RW_TRACE_ERROR0 ("Error: NDEF detection not performed yet");
        return (NFC_STATUS_NOT_INITIALIZED);
    }
    else if (p_cb->ndef_attrib.ln == 0)
    {
        RW_TRACE_ERROR0 ("Type 3 tag contains empty NDEF message");
        return (NFC_STATUS_FAILED);
    }

    /* Check number of blocks needed for this update */
    p_cb->flags &= ~RW_T3T_FL_IS_FINAL_NDEF_SEGMENT;
    p_cb->ndef_rx_offset = 0;
    retval = rw_t3t_send_next_ndef_check_cmd (p_cb);

    return (retval);
}

/*****************************************************************************
**
** Function         RW_T3tUpdateNDef
**
** Description
**      Write NDEF contents to a Type3 tag.
**
**      The RW_T3T_UPDATE_CPLT_EVT callback event will be used to notify the
**      application of the response.
**
**      Before using this API, the RW_T3tDetectNDef function must be called to
**      verify that the tag contains NDEF data, and to retrieve the NDEF
**      attributes.
**
**      Internally, this command will be separated into multiple Tag 3 Update
**      commands (if necessary) - depending on the tag's Nbw (max number of
**      blocks per write) attribute.
**
** Returns
**      NFC_STATUS_OK: check command started
**      NFC_STATUS_NO_BUFFERS: unable to allocate a buffer for this operation
**      NFC_STATUS_REFUSED: tag is read-only
**      NFC_STATUS_BUFFER_FULL: len exceeds tag's maximum size
**      NFC_STATUS_FAILED: other error
**
*****************************************************************************/
tNFC_STATUS RW_T3tUpdateNDef (UINT32 len, UINT8 *p_data)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;

    RW_TRACE_API1 ("RW_T3tUpdateNDef (len=%i)", len);

    /* Check if we are in valid state to handle this API */
    if (p_cb->rw_state != RW_T3T_STATE_IDLE)
    {
        RW_TRACE_ERROR1 ("Error: invalid state to handle API (0x%x)", p_cb->rw_state);
        return (NFC_STATUS_FAILED);
    }
    else if (p_cb->ndef_attrib.status != NFC_STATUS_OK)       /* NDEF detection not performed yet? */
    {
        RW_TRACE_ERROR0 ("Error: NDEF detection not performed yet");
        return (NFC_STATUS_NOT_INITIALIZED);
    }
    else if (len > (((UINT32)p_cb->ndef_attrib.nmaxb) * 16))                /* Len exceed's tag's NDEF memory? */
    {
        return (NFC_STATUS_BUFFER_FULL);
    }
    else if (p_cb->ndef_attrib.rwflag == T3T_MSG_NDEF_RWFLAG_RO)/* Tag's NDEF memory is read-only? */
    {
        return (NFC_STATUS_REFUSED);
    }

    /* Check number of blocks needed for this update */
    p_cb->flags &= ~RW_T3T_FL_IS_FINAL_NDEF_SEGMENT;
    p_cb->ndef_msg_bytes_sent = 0;
    p_cb->ndef_msg_len = len;
    p_cb->ndef_msg = p_data;

    /* Send initial UPDATE command for NDEF Attribute Info */
    retval = rw_t3t_send_update_ndef_attribute_cmd (p_cb, TRUE);

    return (retval);
}

/*****************************************************************************
**
** Function         RW_T3tCheck
**
** Description
**      Read (non-NDEF) contents from a Type3 tag.
**
**      The RW_READ_EVT event is used to notify the application for each
**      segment of NDEF data received. The RW_READ_CPLT_EVT event is used to
**      notify the application all segments have been received.
**
**      Before using this API, the application must call RW_SelectTagType to
**      indicate that a Type 3 tag has been activated, and to provide the
**      tag's Manufacture ID (IDm) .
**
** Returns
**      NFC_STATUS_OK: check command started
**      NFC_STATUS_NO_BUFFERS: unable to allocate a buffer for this operation
**      NFC_STATUS_FAILED: other error
**
*****************************************************************************/
tNFC_STATUS RW_T3tCheck (UINT8 num_blocks, tT3T_BLOCK_DESC *t3t_blocks)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;

    RW_TRACE_API1 ("RW_T3tCheck (num_blocks = %i)", num_blocks);

    /* Check if we are in valid state to handle this API */
    if (p_cb->rw_state != RW_T3T_STATE_IDLE)
    {
        RW_TRACE_ERROR1 ("Error: invalid state to handle API (0x%x)", p_cb->rw_state);
        return (NFC_STATUS_FAILED);
    }

    /* Send the CHECK command */
    retval = rw_t3t_send_check_cmd (p_cb, num_blocks, t3t_blocks);

    return (retval);
}

/*****************************************************************************
**
** Function         RW_T3tUpdate
**
** Description
**      Write (non-NDEF) contents to a Type3 tag.
**
**      The RW_WRITE_CPLT_EVT event is used to notify the application all
**      segments have been received.
**
**      Before using this API, the application must call RW_SelectTagType to
**      indicate that a Type 3 tag has been activated, and to provide the tag's
**      Manufacture ID (IDm) .
**
** Returns
**      NFC_STATUS_OK: check command started
**      NFC_STATUS_NO_BUFFERS: unable to allocate a buffer for this operation
**      NFC_STATUS_FAILED: other error
**
*****************************************************************************/
tNFC_STATUS RW_T3tUpdate (UINT8 num_blocks, tT3T_BLOCK_DESC *t3t_blocks, UINT8 *p_data)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;

    RW_TRACE_API1 ("RW_T3tUpdate (num_blocks = %i)", num_blocks);

    /* Check if we are in valid state to handle this API */
    if (p_cb->rw_state != RW_T3T_STATE_IDLE)
    {
        RW_TRACE_ERROR1 ("Error: invalid state to handle API (0x%x)", p_cb->rw_state);
        return (NFC_STATUS_FAILED);
    }

    /* Send the UPDATE command */
    retval = rw_t3t_send_update_cmd (p_cb, num_blocks, t3t_blocks, p_data);

    return (retval);
}

/*****************************************************************************
**
** Function         RW_T3tPresenceCheck
**
** Description
**      Check if the tag is still in the field.
**
**      The RW_T3T_PRESENCE_CHECK_EVT w/ status is used to indicate presence
**      or non-presence.
**
** Returns
**      NFC_STATUS_OK, if raw data frame sent
**      NFC_STATUS_NO_BUFFERS: unable to allocate a buffer for this operation
**      NFC_STATUS_FAILED: other error
**
*****************************************************************************/
tNFC_STATUS RW_T3tPresenceCheck (void)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    tRW_DATA evt_data;
    tRW_CB *p_rw_cb = &rw_cb;

    RW_TRACE_API0 ("RW_T3tPresenceCheck");

    /* If RW_SelectTagType was not called (no conn_callback) return failure */
    if (!(p_rw_cb->p_cback))
    {
        retval = NFC_STATUS_FAILED;
    }
    /* If we are not activated, then RW_T3T_PRESENCE_CHECK_EVT status=FAIL */
    else if (p_rw_cb->tcb.t3t.rw_state == RW_T3T_STATE_NOT_ACTIVATED)
    {
        evt_data.status = NFC_STATUS_FAILED;
        (*p_rw_cb->p_cback) (RW_T3T_PRESENCE_CHECK_EVT, &evt_data);
    }
    /* If command is pending */
    else if (p_rw_cb->tcb.t3t.rw_state == RW_T3T_STATE_COMMAND_PENDING)
    {
        /* If already performing presence check, return error */
        if (p_rw_cb->tcb.t3t.flags & RW_T3T_FL_W4_PRESENCE_CHECK_POLL_RSP)
        {
            RW_TRACE_DEBUG0 ("RW_T3tPresenceCheck already in progress");
            retval = NFC_STATUS_FAILED;
        }
        /* If busy with any other command, assume that the tag is present */
        else
        {
            evt_data.status = NFC_STATUS_OK;
            (*p_rw_cb->p_cback) (RW_T3T_PRESENCE_CHECK_EVT, &evt_data);
        }
    }
    else
    {
        /* IDLE state: send POLL command */
        if ((retval = (tNFC_STATUS) nci_snd_t3t_polling (0xFFFF, T3T_POLL_RC_SC, 0)) == NCI_STATUS_OK)
        {
            p_rw_cb->tcb.t3t.flags |= RW_T3T_FL_W4_PRESENCE_CHECK_POLL_RSP;
            p_rw_cb->tcb.t3t.rw_state = RW_T3T_STATE_COMMAND_PENDING;
            p_rw_cb->tcb.t3t.cur_poll_rc = 0;

            /* start timer for waiting for responses */
            rw_t3t_start_poll_timer (&p_rw_cb->tcb.t3t);
        }
        else
        {
            RW_TRACE_DEBUG1 ("RW_T3tPresenceCheck error sending NCI_RF_T3T_POLLING cmd (status = 0x%0x)", retval);
        }
    }

    return (retval);
}

/*****************************************************************************
**
** Function         RW_T3tPoll
**
** Description
**      Send POLL command
**
** Returns
**      NFC_STATUS_OK, if raw data frame sent
**      NFC_STATUS_NO_BUFFERS: unable to allocate a buffer for this operation
**      NFC_STATUS_FAILED: other error
**
*****************************************************************************/
tNFC_STATUS RW_T3tPoll (UINT16 system_code, tT3T_POLL_RC rc, UINT8 tsn)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;

    RW_TRACE_API0 ("RW_T3tPoll");

    /* Check if we are in valid state to handle this API */
    if (p_cb->rw_state != RW_T3T_STATE_IDLE)
    {
        RW_TRACE_ERROR1 ("Error: invalid state to handle API (0x%x)", p_cb->rw_state);
        return (NFC_STATUS_FAILED);
    }

    if ((retval = (tNFC_STATUS) nci_snd_t3t_polling (system_code, (UINT8) rc, tsn)) == NCI_STATUS_OK)
    {
        /* start timer for waiting for responses */
        p_cb->cur_poll_rc = rc;
        p_cb->rw_state = RW_T3T_STATE_COMMAND_PENDING;
        rw_t3t_start_poll_timer (p_cb);
    }


    return (retval);
}

/*****************************************************************************
**
** Function         RW_T3tSendRawFrame
**
** Description
**      This function is called to send a raw data frame to the peer device.
**      When type 3 tag receives response from peer, the callback function
**      will be called with a RW_T3T_RAW_FRAME_EVT [Table 6].
**
**      Before using this API, the application must call RW_SelectTagType to
**      indicate that a Type 3 tag has been activated.
**
**      The raw frame should be a properly formatted Type 3 tag message.
**
** Returns
**      NFC_STATUS_OK, if raw data frame sent
**      NFC_STATUS_NO_BUFFERS: unable to allocate a buffer for this operation
**      NFC_STATUS_FAILED: other error
**
*****************************************************************************/
tNFC_STATUS RW_T3tSendRawFrame (UINT16 len, UINT8 *p_data)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;

    RW_TRACE_API1 ("RW_T3tSendRawFrame (len = %i)", len);

    /* Check if we are in valid state to handle this API */
    if (p_cb->rw_state != RW_T3T_STATE_IDLE)
    {
        RW_TRACE_ERROR1 ("Error: invalid state to handle API (0x%x)", p_cb->rw_state);
        return (NFC_STATUS_FAILED);
    }

    /* Send the UPDATE command */
    retval = rw_t3t_send_raw_frame (p_cb, len ,p_data);

    return (retval);
}

/*****************************************************************************
**
** Function         RW_T3tGetSystemCodes
**
** Description
**      Get systems codes supported by the activated tag:
**              Poll for wildcard (FFFF):
**                  - If felica-lite code then poll for ndef (12fc)
**                  - Otherwise send RequestSystmCode command to get
**                    system codes.
**
**      Before using this API, the application must call RW_SelectTagType to
**      indicate that a Type 3 tag has been activated.
**
** Returns
**      NFC_STATUS_OK, if raw data frame sent
**      NFC_STATUS_NO_BUFFERS: unable to allocate a buffer for this operation
**      NFC_STATUS_FAILED: other error
**
*****************************************************************************/
tNFC_STATUS RW_T3tGetSystemCodes (void)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;

    RW_TRACE_API0 ("RW_T3tGetSystemCodes");

    /* Check if we are in valid state to handle this API */
    if (p_cb->rw_state != RW_T3T_STATE_IDLE)
    {
        RW_TRACE_ERROR1 ("Error: invalid state to handle API (0x%x)", p_cb->rw_state);
        return (NFC_STATUS_FAILED);
    }
    else
    {
        if ((retval = (tNFC_STATUS) nci_snd_t3t_polling (0xFFFF, T3T_POLL_RC_SC, 0)) == NCI_STATUS_OK)
        {
            p_cb->cur_cmd = RW_T3T_CMD_GET_SYSTEM_CODES;
            p_cb->cur_tout = RW_T3T_DEFAULT_CMD_TIMEOUT_TICKS;
            p_cb->cur_poll_rc = T3T_POLL_RC_SC;
            p_cb->rw_state = RW_T3T_STATE_COMMAND_PENDING;
            p_cb->rw_substate = RW_T3T_GET_SC_SST_POLL_WILDCARD;
            p_cb->flags |= RW_T3T_FL_W4_GET_SC_POLL_RSP;
            p_cb->num_system_codes = 0;

            /* start timer for waiting for responses */
            rw_t3t_start_poll_timer (p_cb);
        }
    }



    return (retval);
}

/*****************************************************************************
**
** Function         RW_T3tFormatNDef
**
** Description
**      Format a type-3 tag for NDEF.
**
**      Only Felica-Lite tags are supported by this API. The
**      RW_T3T_FORMAT_CPLT_EVT is used to notify the status of the operation.
**
** Returns
**      NFC_STATUS_OK: ndef detection procedure started
**      NFC_STATUS_NO_BUFFERS: unable to allocate a buffer for this operation
**      NFC_STATUS_FAILED: other error
**
*****************************************************************************/
tNFC_STATUS RW_T3tFormatNDef (void)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    tRW_T3T_CB *p_cb = &rw_cb.tcb.t3t;

    RW_TRACE_API0 ("RW_T3tFormatNDef");

    /* Check if we are in valid state to handle this API */
    if (p_cb->rw_state != RW_T3T_STATE_IDLE)
    {
        RW_TRACE_ERROR1 ("Error: invalid state to handle API (0x%x)", p_cb->rw_state);
        return (NFC_STATUS_FAILED);
    }
    else
    {
        /* Poll tag, to see if Felica-Lite system is supported */
        if ((retval = (tNFC_STATUS) nci_snd_t3t_polling (T3T_SYSTEM_CODE_FELICA_LITE, T3T_POLL_RC_SC, 0)) == NCI_STATUS_OK)
        {
            p_cb->cur_cmd = RW_T3T_CMD_FORMAT;
            p_cb->cur_tout = RW_T3T_DEFAULT_CMD_TIMEOUT_TICKS;
            p_cb->cur_poll_rc = T3T_POLL_RC_SC;
            p_cb->rw_state = RW_T3T_STATE_COMMAND_PENDING;
            p_cb->rw_substate = RW_T3T_FMT_SST_POLL_FELICA_LITE;
            p_cb->flags |= RW_T3T_FL_W4_FMT_FELICA_LITE_POLL_RSP;

            /* start timer for waiting for responses */
            rw_t3t_start_poll_timer (p_cb);
        }
    }



    return (retval);
}

/*****************************************************************************
**
** Function         RW_T3tSetReadOnly
**
** Description      This function performs NDEF read-only procedure
**                  Note: Only Felica-Lite tags are supported by this API.
**                        RW_T3tDetectNDef() must be called before using this
**
**                  The RW_T3T_SET_READ_ONLY_CPLT_EVT event will be returned.
**
** Returns          NFC_STATUS_OK if success
**                  NFC_STATUS_FAILED if T3T is busy or other error
**
*****************************************************************************/
tNFC_STATUS RW_T3tSetReadOnly (BOOLEAN b_hard_lock)
{
    tNFC_STATUS retval = NFC_STATUS_OK;
    tRW_T3T_CB  *p_cb  = &rw_cb.tcb.t3t;
    tRW_DATA    evt_data;

    RW_TRACE_API1 ("RW_T3tSetReadOnly (): b_hard_lock=%d", b_hard_lock);

    /* Check if we are in valid state to handle this API */
    if (p_cb->rw_state != RW_T3T_STATE_IDLE)
    {
        RW_TRACE_ERROR1 ("Error: invalid state to handle API (0x%x)", p_cb->rw_state);
        return (NFC_STATUS_FAILED);
    }

    if (p_cb->ndef_attrib.status != NFC_STATUS_OK)       /* NDEF detection not performed yet? */
    {
        RW_TRACE_ERROR0 ("Error: NDEF detection not performed yet");
        return (NFC_STATUS_NOT_INITIALIZED);
    }

    if ((!b_hard_lock) && (p_cb->ndef_attrib.rwflag == T3T_MSG_NDEF_RWFLAG_RO))/* Tag's NDEF memory is read-only already */
    {
        evt_data.status = NFC_STATUS_OK;
        (*(rw_cb.p_cback)) (RW_T3T_SET_READ_ONLY_CPLT_EVT, &evt_data);
        return (retval);
    }
    else
    {
        /* Poll tag, to see if Felica-Lite system is supported */
        if ((retval = (tNFC_STATUS) nci_snd_t3t_polling (T3T_SYSTEM_CODE_FELICA_LITE, T3T_POLL_RC_SC, 0)) == NCI_STATUS_OK)
        {
            if (b_hard_lock)
                p_cb->cur_cmd     = RW_T3T_CMD_SET_READ_ONLY_HARD;
            else
                p_cb->cur_cmd     = RW_T3T_CMD_SET_READ_ONLY_SOFT;
            p_cb->cur_tout    = RW_T3T_DEFAULT_CMD_TIMEOUT_TICKS;
            p_cb->cur_poll_rc = T3T_POLL_RC_SC;
            p_cb->rw_state    = RW_T3T_STATE_COMMAND_PENDING;
            p_cb->rw_substate = RW_T3T_SRO_SST_POLL_FELICA_LITE;
            p_cb->flags |= RW_T3T_FL_W4_SRO_FELICA_LITE_POLL_RSP;

            /* start timer for waiting for responses */
            rw_t3t_start_poll_timer (p_cb);
        }
    }
    return (retval);
}