nfc_vs.c revision e9629bad30a9f478b336ab46b8e6e02f7f87af46 
1/******************************************************************************
2 *
3 *  Copyright (C) 2010-2014 Broadcom Corporation
4 *
5 *  Licensed under the Apache License, Version 2.0 (the "License");
6 *  you may not use this file except in compliance with the License.
7 *  You may obtain a copy of the License at:
8 *
9 *  http://www.apache.org/licenses/LICENSE-2.0
10 *
11 *  Unless required by applicable law or agreed to in writing, software
12 *  distributed under the License is distributed on an "AS IS" BASIS,
13 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 *  See the License for the specific language governing permissions and
15 *  limitations under the License.
16 *
17 ******************************************************************************/
18
19
20/******************************************************************************
21 *
22 *  This file contains functions that NCI vendor specific interface with the
23 *  NFCC. On the receive side, it routes events to the appropriate handler
24 *  (callback). On the transmit side, it manages the command transmission.
25 *
26 ******************************************************************************/
27#include <string.h>
28#include "gki.h"
29#include "nfc_target.h"
30
31#if (NFC_INCLUDED == TRUE)
32#include "nfc_int.h"
33
34/****************************************************************************
35** Declarations
36****************************************************************************/
37
38
39
40/*******************************************************************************
41**
42** Function         NFC_RegVSCback
43**
44** Description      This function is called to register or de-register a callback
45**                  function to receive Proprietary NCI response and notification
46**                  events.
47**                  The maximum number of callback functions allowed is NFC_NUM_VS_CBACKS
48**
49** Returns          tNFC_STATUS
50**
51*******************************************************************************/
52tNFC_STATUS NFC_RegVSCback (BOOLEAN          is_register,
53                            tNFC_VS_CBACK   *p_cback)
54{
55    tNFC_STATUS status = NFC_STATUS_FAILED;
56    int i;
57
58    if (is_register)
59    {
60        for (i = 0; i < NFC_NUM_VS_CBACKS; i++)
61        {
62            /* find an empty spot to hold the callback function */
63            if (nfc_cb.p_vs_cb[i] == NULL)
64            {
65                nfc_cb.p_vs_cb[i]  = p_cback;
66                status             = NFC_STATUS_OK;
67                break;
68            }
69        }
70    }
71    else
72    {
73        for (i = 0; i < NFC_NUM_VS_CBACKS; i++)
74        {
75            /* find the callback to de-register */
76            if (nfc_cb.p_vs_cb[i] == p_cback)
77            {
78                nfc_cb.p_vs_cb[i]  = NULL;
79                status             = NFC_STATUS_OK;
80                break;
81            }
82        }
83    }
84    return status;
85}
86
87
88/*******************************************************************************
89**
90** Function         NFC_SendVsCommand
91**
92** Description      This function is called to send the given vendor specific
93**                  command to NFCC. The response from NFCC is reported to the
94**                  given tNFC_VS_CBACK as (oid).
95**
96** Parameters       oid - The opcode of the VS command.
97**                  p_data - The parameters for the VS command
98**
99** Returns          tNFC_STATUS
100**
101*******************************************************************************/
102tNFC_STATUS NFC_SendVsCommand (UINT8          oid,
103                               BT_HDR        *p_data,
104                               tNFC_VS_CBACK *p_cback)
105{
106    tNFC_STATUS     status = NFC_STATUS_OK;
107    UINT8           *pp;
108
109    /* Allow VSC with 0-length payload */
110    if (p_data == NULL)
111    {
112        p_data = NCI_GET_CMD_BUF (0);
113        if (p_data)
114        {
115            p_data->offset  = NCI_VSC_MSG_HDR_SIZE;
116            p_data->len     = 0;
117        }
118    }
119
120    /* Validate parameters */
121    if ((p_data == NULL) || (p_data->offset < NCI_VSC_MSG_HDR_SIZE) || (p_data->len > NCI_MAX_VSC_SIZE))
122    {
123        NFC_TRACE_ERROR1 ("buffer offset must be >= %d", NCI_VSC_MSG_HDR_SIZE);
124        if (p_data)
125            GKI_freebuf (p_data);
126        return NFC_STATUS_INVALID_PARAM;
127    }
128
129    p_data->event           = BT_EVT_TO_NFC_NCI;
130    p_data->layer_specific  = NFC_WAIT_RSP_VSC;
131    /* save the callback function in the BT_HDR, to receive the response */
132    ((tNFC_NCI_VS_MSG *) p_data)->p_cback = p_cback;
133
134    p_data->offset -= NCI_MSG_HDR_SIZE;
135    pp              = (UINT8 *) (p_data + 1) + p_data->offset;
136    NCI_MSG_BLD_HDR0 (pp, NCI_MT_CMD, NCI_GID_PROP);
137    NCI_MSG_BLD_HDR1 (pp, oid);
138    *pp             = (UINT8) p_data->len;
139    p_data->len    += NCI_MSG_HDR_SIZE;
140    nfc_ncif_check_cmd_queue (p_data);
141    return status;
142}
143
144
145
146
147#endif /* NFC_INCLUDED == TRUE */
148