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 <android-base/logging.h>
27 #include <android-base/stringprintf.h>
28 #include <log/log.h>
29 #include <string.h>
30
31 #include "bt_types.h"
32 #include "ce_api.h"
33 #include "ce_int.h"
34 #include "nfc_target.h"
35
36 using android::base::StringPrintf;
37
38 tCE_CB ce_cb;
39
40 /*******************************************************************************
41 *******************************************************************************/
ce_init(void)42 void ce_init(void) {
43 memset(&ce_cb, 0, sizeof(tCE_CB));
44
45 /* Initialize tag-specific fields of ce control block */
46 ce_t3t_init();
47 }
48
49 /*******************************************************************************
50 **
51 ** Function CE_SendRawFrame
52 **
53 ** Description This function sends a raw frame to the peer device.
54 **
55 ** Returns tNFC_STATUS
56 **
57 *******************************************************************************/
CE_SendRawFrame(uint8_t * p_raw_data,uint16_t data_len)58 tNFC_STATUS CE_SendRawFrame(uint8_t* p_raw_data, uint16_t data_len) {
59 tNFC_STATUS status = NFC_STATUS_FAILED;
60 NFC_HDR* p_data;
61 uint8_t* p;
62
63 if (ce_cb.p_cback) {
64 if (data_len > GKI_get_pool_bufsize(NFC_RW_POOL_ID) - NCI_MSG_OFFSET_SIZE -
65 NCI_DATA_HDR_SIZE - 1) {
66 android_errorWriteLog(0x534e4554, "157649398");
67 return NFC_STATUS_FAILED;
68 }
69
70 /* a valid opcode for RW */
71 p_data = (NFC_HDR*)GKI_getpoolbuf(NFC_RW_POOL_ID);
72 if (p_data) {
73 p_data->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE;
74 p = (uint8_t*)(p_data + 1) + p_data->offset;
75 memcpy(p, p_raw_data, data_len);
76 p_data->len = data_len;
77 LOG(VERBOSE) << StringPrintf("CE SENT raw frame (0x%x)", data_len);
78 status = NFC_SendData(NFC_RF_CONN_ID, p_data);
79 }
80 }
81 return status;
82 }
83
84 /*******************************************************************************
85 **
86 ** Function CE_SetActivatedTagType
87 **
88 ** Description This function selects the tag type for CE mode.
89 **
90 ** Returns tNFC_STATUS
91 **
92 *******************************************************************************/
CE_SetActivatedTagType(tNFC_ACTIVATE_DEVT * p_activate_params,uint16_t t3t_system_code,tCE_CBACK * p_cback)93 tNFC_STATUS CE_SetActivatedTagType(tNFC_ACTIVATE_DEVT* p_activate_params,
94 uint16_t t3t_system_code,
95 tCE_CBACK* p_cback) {
96 tNFC_STATUS status = NFC_STATUS_FAILED;
97 tNFC_PROTOCOL protocol = p_activate_params->protocol;
98
99 LOG(VERBOSE) << StringPrintf("CE_SetActivatedTagType protocol:%d", protocol);
100
101 switch (protocol) {
102 case NFC_PROTOCOL_T1T:
103 case NFC_PROTOCOL_T2T:
104 return NFC_STATUS_FAILED;
105
106 case NFC_PROTOCOL_T3T: /* Type3Tag - NFC-F */
107 /* store callback function before NFC_SetStaticRfCback () */
108 ce_cb.p_cback = p_cback;
109 status = ce_select_t3t(t3t_system_code,
110 p_activate_params->rf_tech_param.param.lf.nfcid2);
111 break;
112
113 case NFC_PROTOCOL_ISO_DEP: /* ISODEP/4A,4B- NFC-A or NFC-B */
114 /* store callback function before NFC_SetStaticRfCback () */
115 ce_cb.p_cback = p_cback;
116 status = ce_select_t4t();
117 break;
118
119 default:
120 LOG(ERROR) << StringPrintf("CE_SetActivatedTagType Invalid protocol");
121 return NFC_STATUS_FAILED;
122 }
123
124 if (status != NFC_STATUS_OK) {
125 NFC_SetStaticRfCback(nullptr);
126 ce_cb.p_cback = nullptr;
127 }
128 return status;
129 }
130