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 "nci_hmsgs.h"
35 #include "nfc_api.h"
36 #include "rw_api.h"
37 #include "rw_int.h"
38
39 using android::base::StringPrintf;
40
41 extern bool nfc_debug_enabled;
42
43 tRW_CB rw_cb;
44
45 /*******************************************************************************
46 *******************************************************************************/
rw_init(void)47 void rw_init(void) {
48 memset(&rw_cb, 0, sizeof(tRW_CB));
49 }
50
51 #if (RW_STATS_INCLUDED == TRUE)
52 /*******************************************************************************
53 * Internal functions for statistics
54 *******************************************************************************/
55 /*******************************************************************************
56 **
57 ** Function rw_main_reset_stats
58 **
59 ** Description Reset counters for statistics
60 **
61 ** Returns void
62 **
63 *******************************************************************************/
rw_main_reset_stats(void)64 void rw_main_reset_stats(void) {
65 memset(&rw_cb.stats, 0, sizeof(tRW_STATS));
66
67 /* Get current tick count */
68 rw_cb.stats.start_tick = GKI_get_tick_count();
69 }
70
71 /*******************************************************************************
72 **
73 ** Function rw_main_update_tx_stats
74 **
75 ** Description Update stats for tx
76 **
77 ** Returns void
78 **
79 *******************************************************************************/
rw_main_update_tx_stats(uint32_t num_bytes,bool is_retry)80 void rw_main_update_tx_stats(uint32_t num_bytes, bool is_retry) {
81 rw_cb.stats.bytes_sent += num_bytes;
82 rw_cb.stats.num_ops++;
83
84 if (is_retry) rw_cb.stats.num_retries++;
85 }
86
87 /*******************************************************************************
88 **
89 ** Function rw_main_update_fail_stats
90 **
91 ** Description Increment failure count
92 **
93 ** Returns void
94 **
95 *******************************************************************************/
rw_main_update_fail_stats(void)96 void rw_main_update_fail_stats(void) { rw_cb.stats.num_fail++; }
97
98 /*******************************************************************************
99 **
100 ** Function rw_main_update_crc_error_stats
101 **
102 ** Description Increment crc error count
103 **
104 ** Returns void
105 **
106 *******************************************************************************/
rw_main_update_crc_error_stats(void)107 void rw_main_update_crc_error_stats(void) { rw_cb.stats.num_crc++; }
108
109 /*******************************************************************************
110 **
111 ** Function rw_main_update_trans_error_stats
112 **
113 ** Description Increment trans error count
114 **
115 ** Returns void
116 **
117 *******************************************************************************/
rw_main_update_trans_error_stats(void)118 void rw_main_update_trans_error_stats(void) { rw_cb.stats.num_trans_err++; }
119
120 /*******************************************************************************
121 **
122 ** Function rw_main_update_rx_stats
123 **
124 ** Description Update stats for rx
125 **
126 ** Returns void
127 **
128 *******************************************************************************/
rw_main_update_rx_stats(uint32_t num_bytes)129 void rw_main_update_rx_stats(uint32_t num_bytes) {
130 rw_cb.stats.bytes_received += num_bytes;
131 }
132
133 /*******************************************************************************
134 **
135 ** Function rw_main_log_stats
136 **
137 ** Description Dump stats
138 **
139 ** Returns void
140 **
141 *******************************************************************************/
rw_main_log_stats(void)142 void rw_main_log_stats(void) {
143 uint32_t ticks, elapsed_ms;
144
145 ticks = GKI_get_tick_count() - rw_cb.stats.start_tick;
146 elapsed_ms = GKI_TICKS_TO_MS(ticks);
147
148 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf(
149 "NFC tx stats: cmds:%i, retries:%i, aborted: %i, tx_errs: %i, bytes "
150 "sent:%i",
151 rw_cb.stats.num_ops, rw_cb.stats.num_retries, rw_cb.stats.num_fail,
152 rw_cb.stats.num_trans_err, rw_cb.stats.bytes_sent);
153 DLOG_IF(INFO, nfc_debug_enabled)
154 << StringPrintf(" rx stats: rx-crc errors %i, bytes received: %i",
155 rw_cb.stats.num_crc, rw_cb.stats.bytes_received);
156 DLOG_IF(INFO, nfc_debug_enabled)
157 << StringPrintf(" time activated %i ms", elapsed_ms);
158 }
159 #endif /* RW_STATS_INCLUDED */
160
161 /*******************************************************************************
162 **
163 ** Function RW_SendRawFrame
164 **
165 ** Description This function sends a raw frame to the peer device.
166 **
167 ** Returns tNFC_STATUS
168 **
169 *******************************************************************************/
RW_SendRawFrame(uint8_t * p_raw_data,uint16_t data_len)170 tNFC_STATUS RW_SendRawFrame(uint8_t* p_raw_data, uint16_t data_len) {
171 tNFC_STATUS status = NFC_STATUS_FAILED;
172 NFC_HDR* p_data;
173 uint8_t* p;
174
175 if (rw_cb.p_cback) {
176 /* a valid opcode for RW - remove */
177 p_data = (NFC_HDR*)GKI_getpoolbuf(NFC_RW_POOL_ID);
178 if (p_data) {
179 p_data->offset = NCI_MSG_OFFSET_SIZE + NCI_DATA_HDR_SIZE;
180 p = (uint8_t*)(p_data + 1) + p_data->offset;
181 memcpy(p, p_raw_data, data_len);
182 p_data->len = data_len;
183
184 DLOG_IF(INFO, nfc_debug_enabled)
185 << StringPrintf("RW SENT raw frame (0x%x)", data_len);
186 status = NFC_SendData(NFC_RF_CONN_ID, p_data);
187 }
188 }
189 return status;
190 }
191
192 /*******************************************************************************
193 **
194 ** Function RW_SetActivatedTagType
195 **
196 ** Description This function selects the tag type for Reader/Writer mode.
197 **
198 ** Returns tNFC_STATUS
199 **
200 *******************************************************************************/
RW_SetActivatedTagType(tNFC_ACTIVATE_DEVT * p_activate_params,tRW_CBACK * p_cback)201 tNFC_STATUS RW_SetActivatedTagType(tNFC_ACTIVATE_DEVT* p_activate_params,
202 tRW_CBACK* p_cback) {
203 tNFC_STATUS status = NFC_STATUS_FAILED;
204
205 /* check for null cback here / remove checks from rw_t?t */
206 DLOG_IF(INFO, nfc_debug_enabled) << StringPrintf(
207 "RW_SetActivatedTagType protocol:%d, technology:%d, SAK:%d",
208 p_activate_params->protocol, p_activate_params->rf_tech_param.mode,
209 p_activate_params->rf_tech_param.param.pa.sel_rsp);
210
211 if (p_cback == nullptr) {
212 LOG(ERROR) << StringPrintf(
213 "RW_SetActivatedTagType called with NULL callback");
214 return (NFC_STATUS_FAILED);
215 }
216
217 /* Reset tag-specific area of control block */
218 memset(&rw_cb.tcb, 0, sizeof(tRW_TCB));
219
220 #if (RW_STATS_INCLUDED == TRUE)
221 /* Reset RW stats */
222 rw_main_reset_stats();
223 #endif /* RW_STATS_INCLUDED */
224
225 rw_cb.p_cback = p_cback;
226 /* not a tag NFC_PROTOCOL_NFCIP1: NFCDEP/LLCP - NFC-A or NFC-F */
227 if (NFC_PROTOCOL_T1T == p_activate_params->protocol) {
228 /* Type1Tag - NFC-A */
229 if (p_activate_params->rf_tech_param.mode == NFC_DISCOVERY_TYPE_POLL_A) {
230 status = rw_t1t_select(p_activate_params->rf_tech_param.param.pa.hr,
231 p_activate_params->rf_tech_param.param.pa.nfcid1);
232 }
233 } else if (NFC_PROTOCOL_T2T == p_activate_params->protocol) {
234 /* Type2Tag - NFC-A */
235 if (p_activate_params->rf_tech_param.mode == NFC_DISCOVERY_TYPE_POLL_A) {
236 if (p_activate_params->rf_tech_param.param.pa.sel_rsp ==
237 NFC_SEL_RES_NFC_FORUM_T2T)
238 status = rw_t2t_select();
239 }
240 } else if (NFC_PROTOCOL_T3T == p_activate_params->protocol) {
241 /* Type3Tag - NFC-F */
242 if (p_activate_params->rf_tech_param.mode == NFC_DISCOVERY_TYPE_POLL_F) {
243 status =
244 rw_t3t_select(p_activate_params->rf_tech_param.param.pf.nfcid2,
245 p_activate_params->rf_tech_param.param.pf.mrti_check,
246 p_activate_params->rf_tech_param.param.pf.mrti_update);
247 }
248 } else if (NFC_PROTOCOL_ISO_DEP == p_activate_params->protocol) {
249 /* ISODEP/4A,4B- NFC-A or NFC-B */
250 if ((p_activate_params->rf_tech_param.mode == NFC_DISCOVERY_TYPE_POLL_B) ||
251 (p_activate_params->rf_tech_param.mode == NFC_DISCOVERY_TYPE_POLL_A)) {
252 status = rw_t4t_select();
253 }
254 } else if (NFC_PROTOCOL_T5T == p_activate_params->protocol) {
255 /* T5T */
256 if (p_activate_params->rf_tech_param.mode == NFC_DISCOVERY_TYPE_POLL_V) {
257 status = rw_i93_select(p_activate_params->rf_tech_param.param.pi93.uid);
258 }
259 } else if (NFC_PROTOCOL_MIFARE == p_activate_params->protocol) {
260 /* Mifare Classic*/
261 if (p_activate_params->rf_tech_param.mode == NFC_DISCOVERY_TYPE_POLL_A) {
262 status = rw_mfc_select(
263 p_activate_params->rf_tech_param.param.pa.sel_rsp,
264 p_activate_params->rf_tech_param.param.pa.nfcid1 +
265 p_activate_params->rf_tech_param.param.pa.nfcid1_len - 4);
266 }
267 }
268 /* TODO set up callback for proprietary protocol */
269 else {
270 LOG(ERROR) << StringPrintf("RW_SetActivatedTagType Invalid protocol");
271 }
272
273 if (status != NFC_STATUS_OK) rw_cb.p_cback = nullptr;
274 return status;
275 }
276