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1 /******************************************************************************
2  *
3  *  Copyright (C) 2009-2014 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  *  This file contains functions that interface with the NFC NCI transport.
22  *  On the receive side, it routes events to the appropriate handler
23  *  (callback). On the transmit side, it manages the command transmission.
24  *
25  ******************************************************************************/
26 #include <string.h>
27 
28 #include <android-base/stringprintf.h>
29 #include <base/logging.h>
30 
31 #include "nfc_target.h"
32 
33 #include "bt_types.h"
34 #include "ce_api.h"
35 #include "ce_int.h"
36 
37 using android::base::StringPrintf;
38 
39 extern bool nfc_debug_enabled;
40 
41 tCE_CB ce_cb;
42 
43 /*******************************************************************************
44 *******************************************************************************/
ce_init(void)45 void ce_init(void) {
46   memset(&ce_cb, 0, sizeof(tCE_CB));
47 
48   /* Initialize tag-specific fields of ce control block */
49   ce_t3t_init();
50 }
51 
52 /*******************************************************************************
53 **
54 ** Function         CE_SendRawFrame
55 **
56 ** Description      This function sends a raw frame to the peer device.
57 **
58 ** Returns          tNFC_STATUS
59 **
60 *******************************************************************************/
CE_SendRawFrame(uint8_t * p_raw_data,uint16_t data_len)61 tNFC_STATUS CE_SendRawFrame(uint8_t* p_raw_data, uint16_t data_len) {
62   tNFC_STATUS status = NFC_STATUS_FAILED;
63   NFC_HDR* p_data;
64   uint8_t* p;
65 
66   if (ce_cb.p_cback) {
67     /* a valid opcode for RW */
68     p_data = (NFC_HDR*)GKI_getpoolbuf(NFC_RW_POOL_ID);
69     if (p_data) {
70       p_data->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE;
71       p = (uint8_t*)(p_data + 1) + p_data->offset;
72       memcpy(p, p_raw_data, data_len);
73       p_data->len = data_len;
74       DLOG_IF(INFO, nfc_debug_enabled)
75           << StringPrintf("CE SENT raw frame (0x%x)", data_len);
76       status = NFC_SendData(NFC_RF_CONN_ID, p_data);
77     }
78   }
79   return status;
80 }
81 
82 /*******************************************************************************
83 **
84 ** Function         CE_SetActivatedTagType
85 **
86 ** Description      This function selects the tag type for CE mode.
87 **
88 ** Returns          tNFC_STATUS
89 **
90 *******************************************************************************/
CE_SetActivatedTagType(tNFC_ACTIVATE_DEVT * p_activate_params,uint16_t t3t_system_code,tCE_CBACK * p_cback)91 tNFC_STATUS CE_SetActivatedTagType(tNFC_ACTIVATE_DEVT* p_activate_params,
92                                    uint16_t t3t_system_code,
93                                    tCE_CBACK* p_cback) {
94   tNFC_STATUS status = NFC_STATUS_FAILED;
95   tNFC_PROTOCOL protocol = p_activate_params->protocol;
96 
97   DLOG_IF(INFO, nfc_debug_enabled)
98       << StringPrintf("CE_SetActivatedTagType protocol:%d", protocol);
99 
100   switch (protocol) {
101     case NFC_PROTOCOL_T1T:
102     case NFC_PROTOCOL_T2T:
103       return NFC_STATUS_FAILED;
104 
105     case NFC_PROTOCOL_T3T: /* Type3Tag    - NFC-F */
106       /* store callback function before NFC_SetStaticRfCback () */
107       ce_cb.p_cback = p_cback;
108       status = ce_select_t3t(t3t_system_code,
109                              p_activate_params->rf_tech_param.param.lf.nfcid2);
110       break;
111 
112     case NFC_PROTOCOL_ISO_DEP: /* ISODEP/4A,4B- NFC-A or NFC-B */
113       /* store callback function before NFC_SetStaticRfCback () */
114       ce_cb.p_cback = p_cback;
115       status = ce_select_t4t();
116       break;
117 
118     default:
119       LOG(ERROR) << StringPrintf("CE_SetActivatedTagType Invalid protocol");
120       return NFC_STATUS_FAILED;
121   }
122 
123   if (status != NFC_STATUS_OK) {
124     NFC_SetStaticRfCback(nullptr);
125     ce_cb.p_cback = nullptr;
126   }
127   return status;
128 }
129