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/stringprintf.h>
27 #include <base/logging.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 extern bool nfc_debug_enabled;
39
40 tCE_CB ce_cb;
41
42 /*******************************************************************************
43 *******************************************************************************/
ce_init(void)44 void ce_init(void) {
45 memset(&ce_cb, 0, sizeof(tCE_CB));
46
47 /* Initialize tag-specific fields of ce control block */
48 ce_t3t_init();
49 }
50
51 /*******************************************************************************
52 **
53 ** Function CE_SendRawFrame
54 **
55 ** Description This function sends a raw frame to the peer device.
56 **
57 ** Returns tNFC_STATUS
58 **
59 *******************************************************************************/
CE_SendRawFrame(uint8_t * p_raw_data,uint16_t data_len)60 tNFC_STATUS CE_SendRawFrame(uint8_t* p_raw_data, uint16_t data_len) {
61 tNFC_STATUS status = NFC_STATUS_FAILED;
62 NFC_HDR* p_data;
63 uint8_t* p;
64
65 if (ce_cb.p_cback) {
66 if (data_len > GKI_get_pool_bufsize(NFC_RW_POOL_ID) - NCI_MSG_OFFSET_SIZE -
67 NCI_DATA_HDR_SIZE - 1) {
68 android_errorWriteLog(0x534e4554, "157649398");
69 return NFC_STATUS_FAILED;
70 }
71
72 /* a valid opcode for RW */
73 p_data = (NFC_HDR*)GKI_getpoolbuf(NFC_RW_POOL_ID);
74 if (p_data) {
75 p_data->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE;
76 p = (uint8_t*)(p_data + 1) + p_data->offset;
77 memcpy(p, p_raw_data, data_len);
78 p_data->len = data_len;
79 DLOG_IF(INFO, nfc_debug_enabled)
80 << StringPrintf("CE SENT raw frame (0x%x)", data_len);
81 status = NFC_SendData(NFC_RF_CONN_ID, p_data);
82 }
83 }
84 return status;
85 }
86
87 /*******************************************************************************
88 **
89 ** Function CE_SetActivatedTagType
90 **
91 ** Description This function selects the tag type for CE mode.
92 **
93 ** Returns tNFC_STATUS
94 **
95 *******************************************************************************/
CE_SetActivatedTagType(tNFC_ACTIVATE_DEVT * p_activate_params,uint16_t t3t_system_code,tCE_CBACK * p_cback)96 tNFC_STATUS CE_SetActivatedTagType(tNFC_ACTIVATE_DEVT* p_activate_params,
97 uint16_t t3t_system_code,
98 tCE_CBACK* p_cback) {
99 tNFC_STATUS status = NFC_STATUS_FAILED;
100 tNFC_PROTOCOL protocol = p_activate_params->protocol;
101
102 DLOG_IF(INFO, nfc_debug_enabled)
103 << StringPrintf("CE_SetActivatedTagType protocol:%d", protocol);
104
105 switch (protocol) {
106 case NFC_PROTOCOL_T1T:
107 case NFC_PROTOCOL_T2T:
108 return NFC_STATUS_FAILED;
109
110 case NFC_PROTOCOL_T3T: /* Type3Tag - NFC-F */
111 /* store callback function before NFC_SetStaticRfCback () */
112 ce_cb.p_cback = p_cback;
113 status = ce_select_t3t(t3t_system_code,
114 p_activate_params->rf_tech_param.param.lf.nfcid2);
115 break;
116
117 case NFC_PROTOCOL_ISO_DEP: /* ISODEP/4A,4B- NFC-A or NFC-B */
118 /* store callback function before NFC_SetStaticRfCback () */
119 ce_cb.p_cback = p_cback;
120 status = ce_select_t4t();
121 break;
122
123 default:
124 LOG(ERROR) << StringPrintf("CE_SetActivatedTagType Invalid protocol");
125 return NFC_STATUS_FAILED;
126 }
127
128 if (status != NFC_STATUS_OK) {
129 NFC_SetStaticRfCback(nullptr);
130 ce_cb.p_cback = nullptr;
131 }
132 return status;
133 }
134