1 /*
2 * Secure Element driver for STMicroelectronics NFC NCI chip
3 *
4 * Copyright (C) 2014-2015 STMicroelectronics SAS. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #include <linux/module.h>
20 #include <linux/nfc.h>
21 #include <linux/delay.h>
22 #include <net/nfc/nci.h>
23 #include <net/nfc/nci_core.h>
24
25 #include "st-nci.h"
26
27 struct st_nci_pipe_info {
28 u8 pipe_state;
29 u8 src_host_id;
30 u8 src_gate_id;
31 u8 dst_host_id;
32 u8 dst_gate_id;
33 } __packed;
34
35 /* Hosts */
36 #define ST_NCI_HOST_CONTROLLER_ID 0x00
37 #define ST_NCI_TERMINAL_HOST_ID 0x01
38 #define ST_NCI_UICC_HOST_ID 0x02
39 #define ST_NCI_ESE_HOST_ID 0xc0
40
41 /* Gates */
42 #define ST_NCI_APDU_READER_GATE 0xf0
43 #define ST_NCI_CONNECTIVITY_GATE 0x41
44
45 /* Pipes */
46 #define ST_NCI_DEVICE_MGNT_PIPE 0x02
47
48 /* Connectivity pipe only */
49 #define ST_NCI_SE_COUNT_PIPE_UICC 0x01
50 /* Connectivity + APDU Reader pipe */
51 #define ST_NCI_SE_COUNT_PIPE_EMBEDDED 0x02
52
53 #define ST_NCI_SE_TO_HOT_PLUG 1000 /* msecs */
54 #define ST_NCI_SE_TO_PIPES 2000
55
56 #define ST_NCI_EVT_HOT_PLUG_IS_INHIBITED(x) (x->data[0] & 0x80)
57
58 #define NCI_HCI_APDU_PARAM_ATR 0x01
59 #define NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY 0x01
60 #define NCI_HCI_ADMIN_PARAM_WHITELIST 0x03
61 #define NCI_HCI_ADMIN_PARAM_HOST_LIST 0x04
62
63 #define ST_NCI_EVT_SE_HARD_RESET 0x20
64 #define ST_NCI_EVT_TRANSMIT_DATA 0x10
65 #define ST_NCI_EVT_WTX_REQUEST 0x11
66 #define ST_NCI_EVT_SE_SOFT_RESET 0x11
67 #define ST_NCI_EVT_SE_END_OF_APDU_TRANSFER 0x21
68 #define ST_NCI_EVT_HOT_PLUG 0x03
69
70 #define ST_NCI_SE_MODE_OFF 0x00
71 #define ST_NCI_SE_MODE_ON 0x01
72
73 #define ST_NCI_EVT_CONNECTIVITY 0x10
74 #define ST_NCI_EVT_TRANSACTION 0x12
75
76 #define ST_NCI_DM_GETINFO 0x13
77 #define ST_NCI_DM_GETINFO_PIPE_LIST 0x02
78 #define ST_NCI_DM_GETINFO_PIPE_INFO 0x01
79 #define ST_NCI_DM_PIPE_CREATED 0x02
80 #define ST_NCI_DM_PIPE_OPEN 0x04
81 #define ST_NCI_DM_RF_ACTIVE 0x80
82 #define ST_NCI_DM_DISCONNECT 0x30
83
84 #define ST_NCI_DM_IS_PIPE_OPEN(p) \
85 ((p & 0x0f) == (ST_NCI_DM_PIPE_CREATED | ST_NCI_DM_PIPE_OPEN))
86
87 #define ST_NCI_ATR_DEFAULT_BWI 0x04
88
89 /*
90 * WT = 2^BWI/10[s], convert into msecs and add a secure
91 * room by increasing by 2 this timeout
92 */
93 #define ST_NCI_BWI_TO_TIMEOUT(x) ((1 << x) * 200)
94 #define ST_NCI_ATR_GET_Y_FROM_TD(x) (x >> 4)
95
96 /* If TA is present bit 0 is set */
97 #define ST_NCI_ATR_TA_PRESENT(x) (x & 0x01)
98 /* If TB is present bit 1 is set */
99 #define ST_NCI_ATR_TB_PRESENT(x) (x & 0x02)
100
101 #define ST_NCI_NUM_DEVICES 256
102
103 static DECLARE_BITMAP(dev_mask, ST_NCI_NUM_DEVICES);
104
105 /* Here are the mandatory pipe for st_nci */
106 static struct nci_hci_gate st_nci_gates[] = {
107 {NCI_HCI_ADMIN_GATE, NCI_HCI_ADMIN_PIPE,
108 ST_NCI_HOST_CONTROLLER_ID},
109 {NCI_HCI_LINK_MGMT_GATE, NCI_HCI_LINK_MGMT_PIPE,
110 ST_NCI_HOST_CONTROLLER_ID},
111 {ST_NCI_DEVICE_MGNT_GATE, ST_NCI_DEVICE_MGNT_PIPE,
112 ST_NCI_HOST_CONTROLLER_ID},
113
114 {NCI_HCI_IDENTITY_MGMT_GATE, NCI_HCI_INVALID_PIPE,
115 ST_NCI_HOST_CONTROLLER_ID},
116
117 /* Secure element pipes are created by secure element host */
118 {ST_NCI_CONNECTIVITY_GATE, NCI_HCI_DO_NOT_OPEN_PIPE,
119 ST_NCI_HOST_CONTROLLER_ID},
120 {ST_NCI_APDU_READER_GATE, NCI_HCI_DO_NOT_OPEN_PIPE,
121 ST_NCI_HOST_CONTROLLER_ID},
122 };
123
st_nci_se_get_bwi(struct nci_dev * ndev)124 static u8 st_nci_se_get_bwi(struct nci_dev *ndev)
125 {
126 int i;
127 u8 td;
128 struct st_nci_info *info = nci_get_drvdata(ndev);
129
130 /* Bits 8 to 5 of the first TB for T=1 encode BWI from zero to nine */
131 for (i = 1; i < ST_NCI_ESE_MAX_LENGTH; i++) {
132 td = ST_NCI_ATR_GET_Y_FROM_TD(info->se_info.atr[i]);
133 if (ST_NCI_ATR_TA_PRESENT(td))
134 i++;
135 if (ST_NCI_ATR_TB_PRESENT(td)) {
136 i++;
137 return info->se_info.atr[i] >> 4;
138 }
139 }
140 return ST_NCI_ATR_DEFAULT_BWI;
141 }
142
st_nci_se_get_atr(struct nci_dev * ndev)143 static void st_nci_se_get_atr(struct nci_dev *ndev)
144 {
145 struct st_nci_info *info = nci_get_drvdata(ndev);
146 int r;
147 struct sk_buff *skb;
148
149 r = nci_hci_get_param(ndev, ST_NCI_APDU_READER_GATE,
150 NCI_HCI_APDU_PARAM_ATR, &skb);
151 if (r < 0)
152 return;
153
154 if (skb->len <= ST_NCI_ESE_MAX_LENGTH) {
155 memcpy(info->se_info.atr, skb->data, skb->len);
156
157 info->se_info.wt_timeout =
158 ST_NCI_BWI_TO_TIMEOUT(st_nci_se_get_bwi(ndev));
159 }
160 kfree_skb(skb);
161 }
162
st_nci_hci_load_session(struct nci_dev * ndev)163 int st_nci_hci_load_session(struct nci_dev *ndev)
164 {
165 int i, j, r;
166 struct sk_buff *skb_pipe_list, *skb_pipe_info;
167 struct st_nci_pipe_info *dm_pipe_info;
168 u8 pipe_list[] = { ST_NCI_DM_GETINFO_PIPE_LIST,
169 ST_NCI_TERMINAL_HOST_ID};
170 u8 pipe_info[] = { ST_NCI_DM_GETINFO_PIPE_INFO,
171 ST_NCI_TERMINAL_HOST_ID, 0};
172
173 /* On ST_NCI device pipes number are dynamics
174 * If pipes are already created, hci_dev_up will fail.
175 * Doing a clear all pipe is a bad idea because:
176 * - It does useless EEPROM cycling
177 * - It might cause issue for secure elements support
178 * (such as removing connectivity or APDU reader pipe)
179 * A better approach on ST_NCI is to:
180 * - get a pipe list for each host.
181 * (eg: ST_NCI_HOST_CONTROLLER_ID for now).
182 * (TODO Later on UICC HOST and eSE HOST)
183 * - get pipe information
184 * - match retrieved pipe list in st_nci_gates
185 * ST_NCI_DEVICE_MGNT_GATE is a proprietary gate
186 * with ST_NCI_DEVICE_MGNT_PIPE.
187 * Pipe can be closed and need to be open.
188 */
189 r = nci_hci_connect_gate(ndev, ST_NCI_HOST_CONTROLLER_ID,
190 ST_NCI_DEVICE_MGNT_GATE,
191 ST_NCI_DEVICE_MGNT_PIPE);
192 if (r < 0)
193 return r;
194
195 /* Get pipe list */
196 r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
197 ST_NCI_DM_GETINFO, pipe_list, sizeof(pipe_list),
198 &skb_pipe_list);
199 if (r < 0)
200 return r;
201
202 /* Complete the existing gate_pipe table */
203 for (i = 0; i < skb_pipe_list->len; i++) {
204 pipe_info[2] = skb_pipe_list->data[i];
205 r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
206 ST_NCI_DM_GETINFO, pipe_info,
207 sizeof(pipe_info), &skb_pipe_info);
208
209 if (r)
210 continue;
211
212 /*
213 * Match pipe ID and gate ID
214 * Output format from ST21NFC_DM_GETINFO is:
215 * - pipe state (1byte)
216 * - source hid (1byte)
217 * - source gid (1byte)
218 * - destination hid (1byte)
219 * - destination gid (1byte)
220 */
221 dm_pipe_info = (struct st_nci_pipe_info *)skb_pipe_info->data;
222 if (dm_pipe_info->dst_gate_id == ST_NCI_APDU_READER_GATE &&
223 dm_pipe_info->src_host_id == ST_NCI_UICC_HOST_ID) {
224 pr_err("Unexpected apdu_reader pipe on host %x\n",
225 dm_pipe_info->src_host_id);
226 kfree_skb(skb_pipe_info);
227 continue;
228 }
229
230 for (j = 3; (j < ARRAY_SIZE(st_nci_gates)) &&
231 (st_nci_gates[j].gate != dm_pipe_info->dst_gate_id); j++)
232 ;
233
234 if (j < ARRAY_SIZE(st_nci_gates) &&
235 st_nci_gates[j].gate == dm_pipe_info->dst_gate_id &&
236 ST_NCI_DM_IS_PIPE_OPEN(dm_pipe_info->pipe_state)) {
237 ndev->hci_dev->init_data.gates[j].pipe = pipe_info[2];
238
239 ndev->hci_dev->gate2pipe[st_nci_gates[j].gate] =
240 pipe_info[2];
241 ndev->hci_dev->pipes[pipe_info[2]].gate =
242 st_nci_gates[j].gate;
243 ndev->hci_dev->pipes[pipe_info[2]].host =
244 dm_pipe_info->src_host_id;
245 }
246 kfree_skb(skb_pipe_info);
247 }
248
249 /*
250 * 3 gates have a well known pipe ID. Only NCI_HCI_LINK_MGMT_GATE
251 * is not yet open at this stage.
252 */
253 r = nci_hci_connect_gate(ndev, ST_NCI_HOST_CONTROLLER_ID,
254 NCI_HCI_LINK_MGMT_GATE,
255 NCI_HCI_LINK_MGMT_PIPE);
256
257 kfree_skb(skb_pipe_list);
258 return r;
259 }
260 EXPORT_SYMBOL_GPL(st_nci_hci_load_session);
261
st_nci_hci_admin_event_received(struct nci_dev * ndev,u8 event,struct sk_buff * skb)262 static void st_nci_hci_admin_event_received(struct nci_dev *ndev,
263 u8 event, struct sk_buff *skb)
264 {
265 struct st_nci_info *info = nci_get_drvdata(ndev);
266
267 switch (event) {
268 case ST_NCI_EVT_HOT_PLUG:
269 if (info->se_info.se_active) {
270 if (!ST_NCI_EVT_HOT_PLUG_IS_INHIBITED(skb)) {
271 del_timer_sync(&info->se_info.se_active_timer);
272 info->se_info.se_active = false;
273 complete(&info->se_info.req_completion);
274 } else {
275 mod_timer(&info->se_info.se_active_timer,
276 jiffies +
277 msecs_to_jiffies(ST_NCI_SE_TO_PIPES));
278 }
279 }
280 break;
281 default:
282 nfc_err(&ndev->nfc_dev->dev, "Unexpected event on admin gate\n");
283 }
284 }
285
st_nci_hci_apdu_reader_event_received(struct nci_dev * ndev,u8 event,struct sk_buff * skb)286 static int st_nci_hci_apdu_reader_event_received(struct nci_dev *ndev,
287 u8 event,
288 struct sk_buff *skb)
289 {
290 int r = 0;
291 struct st_nci_info *info = nci_get_drvdata(ndev);
292
293 pr_debug("apdu reader gate event: %x\n", event);
294
295 switch (event) {
296 case ST_NCI_EVT_TRANSMIT_DATA:
297 del_timer_sync(&info->se_info.bwi_timer);
298 info->se_info.bwi_active = false;
299 info->se_info.cb(info->se_info.cb_context,
300 skb->data, skb->len, 0);
301 break;
302 case ST_NCI_EVT_WTX_REQUEST:
303 mod_timer(&info->se_info.bwi_timer, jiffies +
304 msecs_to_jiffies(info->se_info.wt_timeout));
305 break;
306 default:
307 nfc_err(&ndev->nfc_dev->dev, "Unexpected event on apdu reader gate\n");
308 return 1;
309 }
310
311 kfree_skb(skb);
312 return r;
313 }
314
315 /*
316 * Returns:
317 * <= 0: driver handled the event, skb consumed
318 * 1: driver does not handle the event, please do standard processing
319 */
st_nci_hci_connectivity_event_received(struct nci_dev * ndev,u8 host,u8 event,struct sk_buff * skb)320 static int st_nci_hci_connectivity_event_received(struct nci_dev *ndev,
321 u8 host, u8 event,
322 struct sk_buff *skb)
323 {
324 int r = 0;
325 struct device *dev = &ndev->nfc_dev->dev;
326 struct nfc_evt_transaction *transaction;
327
328 pr_debug("connectivity gate event: %x\n", event);
329
330 switch (event) {
331 case ST_NCI_EVT_CONNECTIVITY:
332 r = nfc_se_connectivity(ndev->nfc_dev, host);
333 break;
334 case ST_NCI_EVT_TRANSACTION:
335 /* According to specification etsi 102 622
336 * 11.2.2.4 EVT_TRANSACTION Table 52
337 * Description Tag Length
338 * AID 81 5 to 16
339 * PARAMETERS 82 0 to 255
340 */
341 if (skb->len < NFC_MIN_AID_LENGTH + 2 &&
342 skb->data[0] != NFC_EVT_TRANSACTION_AID_TAG)
343 return -EPROTO;
344
345 transaction = (struct nfc_evt_transaction *)devm_kzalloc(dev,
346 skb->len - 2, GFP_KERNEL);
347
348 transaction->aid_len = skb->data[1];
349 memcpy(transaction->aid, &skb->data[2], transaction->aid_len);
350
351 /* Check next byte is PARAMETERS tag (82) */
352 if (skb->data[transaction->aid_len + 2] !=
353 NFC_EVT_TRANSACTION_PARAMS_TAG)
354 return -EPROTO;
355
356 transaction->params_len = skb->data[transaction->aid_len + 3];
357 memcpy(transaction->params, skb->data +
358 transaction->aid_len + 4, transaction->params_len);
359
360 r = nfc_se_transaction(ndev->nfc_dev, host, transaction);
361 break;
362 default:
363 nfc_err(&ndev->nfc_dev->dev, "Unexpected event on connectivity gate\n");
364 return 1;
365 }
366 kfree_skb(skb);
367 return r;
368 }
369
st_nci_hci_event_received(struct nci_dev * ndev,u8 pipe,u8 event,struct sk_buff * skb)370 void st_nci_hci_event_received(struct nci_dev *ndev, u8 pipe,
371 u8 event, struct sk_buff *skb)
372 {
373 u8 gate = ndev->hci_dev->pipes[pipe].gate;
374 u8 host = ndev->hci_dev->pipes[pipe].host;
375
376 switch (gate) {
377 case NCI_HCI_ADMIN_GATE:
378 st_nci_hci_admin_event_received(ndev, event, skb);
379 break;
380 case ST_NCI_APDU_READER_GATE:
381 st_nci_hci_apdu_reader_event_received(ndev, event, skb);
382 break;
383 case ST_NCI_CONNECTIVITY_GATE:
384 st_nci_hci_connectivity_event_received(ndev, host, event, skb);
385 break;
386 }
387 }
388 EXPORT_SYMBOL_GPL(st_nci_hci_event_received);
389
st_nci_hci_cmd_received(struct nci_dev * ndev,u8 pipe,u8 cmd,struct sk_buff * skb)390 void st_nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe, u8 cmd,
391 struct sk_buff *skb)
392 {
393 struct st_nci_info *info = nci_get_drvdata(ndev);
394 u8 gate = ndev->hci_dev->pipes[pipe].gate;
395
396 pr_debug("cmd: %x\n", cmd);
397
398 switch (cmd) {
399 case NCI_HCI_ANY_OPEN_PIPE:
400 if (gate != ST_NCI_APDU_READER_GATE &&
401 ndev->hci_dev->pipes[pipe].host != ST_NCI_UICC_HOST_ID)
402 ndev->hci_dev->count_pipes++;
403
404 if (ndev->hci_dev->count_pipes ==
405 ndev->hci_dev->expected_pipes) {
406 del_timer_sync(&info->se_info.se_active_timer);
407 info->se_info.se_active = false;
408 ndev->hci_dev->count_pipes = 0;
409 complete(&info->se_info.req_completion);
410 }
411 break;
412 }
413 }
414 EXPORT_SYMBOL_GPL(st_nci_hci_cmd_received);
415
st_nci_control_se(struct nci_dev * ndev,u8 se_idx,u8 state)416 static int st_nci_control_se(struct nci_dev *ndev, u8 se_idx,
417 u8 state)
418 {
419 struct st_nci_info *info = nci_get_drvdata(ndev);
420 int r, i;
421 struct sk_buff *sk_host_list;
422 u8 host_id;
423
424 switch (se_idx) {
425 case ST_NCI_UICC_HOST_ID:
426 ndev->hci_dev->count_pipes = 0;
427 ndev->hci_dev->expected_pipes = ST_NCI_SE_COUNT_PIPE_UICC;
428 break;
429 case ST_NCI_ESE_HOST_ID:
430 ndev->hci_dev->count_pipes = 0;
431 ndev->hci_dev->expected_pipes = ST_NCI_SE_COUNT_PIPE_EMBEDDED;
432 break;
433 default:
434 return -EINVAL;
435 }
436
437 /*
438 * Wait for an EVT_HOT_PLUG in order to
439 * retrieve a relevant host list.
440 */
441 reinit_completion(&info->se_info.req_completion);
442 r = nci_nfcee_mode_set(ndev, se_idx, state);
443 if (r != NCI_STATUS_OK)
444 return r;
445
446 mod_timer(&info->se_info.se_active_timer, jiffies +
447 msecs_to_jiffies(ST_NCI_SE_TO_HOT_PLUG));
448 info->se_info.se_active = true;
449
450 /* Ignore return value and check in any case the host_list */
451 wait_for_completion_interruptible(&info->se_info.req_completion);
452
453 /* There might be some "collision" after receiving a HOT_PLUG event
454 * This may cause the CLF to not answer to the next hci command.
455 * There is no possible synchronization to prevent this.
456 * Adding a small delay is the only way to solve the issue.
457 */
458 if (info->se_info.se_status->is_ese_present &&
459 info->se_info.se_status->is_uicc_present)
460 usleep_range(15000, 20000);
461
462 r = nci_hci_get_param(ndev, NCI_HCI_ADMIN_GATE,
463 NCI_HCI_ADMIN_PARAM_HOST_LIST, &sk_host_list);
464 if (r != NCI_HCI_ANY_OK)
465 return r;
466
467 for (i = 0; i < sk_host_list->len &&
468 sk_host_list->data[i] != se_idx; i++)
469 ;
470 host_id = sk_host_list->data[i];
471 kfree_skb(sk_host_list);
472 if (state == ST_NCI_SE_MODE_ON && host_id == se_idx)
473 return se_idx;
474 else if (state == ST_NCI_SE_MODE_OFF && host_id != se_idx)
475 return se_idx;
476
477 return -1;
478 }
479
st_nci_disable_se(struct nci_dev * ndev,u32 se_idx)480 int st_nci_disable_se(struct nci_dev *ndev, u32 se_idx)
481 {
482 int r;
483
484 pr_debug("st_nci_disable_se\n");
485
486 /*
487 * According to upper layer, se_idx == NFC_SE_UICC when
488 * info->se_info.se_status->is_uicc_enable is true should never happen
489 * Same for eSE.
490 */
491 r = st_nci_control_se(ndev, se_idx, ST_NCI_SE_MODE_OFF);
492 if (r < 0) {
493 /* Do best effort to release SWP */
494 if (se_idx == NFC_SE_EMBEDDED) {
495 r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE,
496 ST_NCI_EVT_SE_END_OF_APDU_TRANSFER,
497 NULL, 0);
498 }
499 return r;
500 }
501
502 return 0;
503 }
504 EXPORT_SYMBOL_GPL(st_nci_disable_se);
505
st_nci_enable_se(struct nci_dev * ndev,u32 se_idx)506 int st_nci_enable_se(struct nci_dev *ndev, u32 se_idx)
507 {
508 int r;
509
510 pr_debug("st_nci_enable_se\n");
511
512 /*
513 * According to upper layer, se_idx == NFC_SE_UICC when
514 * info->se_info.se_status->is_uicc_enable is true should never happen.
515 * Same for eSE.
516 */
517 r = st_nci_control_se(ndev, se_idx, ST_NCI_SE_MODE_ON);
518 if (r == ST_NCI_ESE_HOST_ID) {
519 st_nci_se_get_atr(ndev);
520 r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE,
521 ST_NCI_EVT_SE_SOFT_RESET, NULL, 0);
522 }
523
524 if (r < 0) {
525 /*
526 * The activation procedure failed, the secure element
527 * is not connected. Remove from the list.
528 */
529 nfc_remove_se(ndev->nfc_dev, se_idx);
530 return r;
531 }
532
533 return 0;
534 }
535 EXPORT_SYMBOL_GPL(st_nci_enable_se);
536
st_nci_hci_network_init(struct nci_dev * ndev)537 static int st_nci_hci_network_init(struct nci_dev *ndev)
538 {
539 struct st_nci_info *info = nci_get_drvdata(ndev);
540 struct core_conn_create_dest_spec_params *dest_params;
541 struct dest_spec_params spec_params;
542 struct nci_conn_info *conn_info;
543 int r, dev_num;
544
545 dest_params =
546 kzalloc(sizeof(struct core_conn_create_dest_spec_params) +
547 sizeof(struct dest_spec_params), GFP_KERNEL);
548 if (dest_params == NULL) {
549 r = -ENOMEM;
550 goto exit;
551 }
552
553 dest_params->type = NCI_DESTINATION_SPECIFIC_PARAM_NFCEE_TYPE;
554 dest_params->length = sizeof(struct dest_spec_params);
555 spec_params.id = ndev->hci_dev->nfcee_id;
556 spec_params.protocol = NCI_NFCEE_INTERFACE_HCI_ACCESS;
557 memcpy(dest_params->value, &spec_params,
558 sizeof(struct dest_spec_params));
559 r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCEE, 1,
560 sizeof(struct core_conn_create_dest_spec_params) +
561 sizeof(struct dest_spec_params),
562 dest_params);
563 if (r != NCI_STATUS_OK)
564 goto free_dest_params;
565
566 conn_info = ndev->hci_dev->conn_info;
567 if (!conn_info)
568 goto free_dest_params;
569
570 ndev->hci_dev->init_data.gate_count = ARRAY_SIZE(st_nci_gates);
571 memcpy(ndev->hci_dev->init_data.gates, st_nci_gates,
572 sizeof(st_nci_gates));
573
574 /*
575 * Session id must include the driver name + i2c bus addr
576 * persistent info to discriminate 2 identical chips
577 */
578 dev_num = find_first_zero_bit(dev_mask, ST_NCI_NUM_DEVICES);
579 if (dev_num >= ST_NCI_NUM_DEVICES) {
580 r = -ENODEV;
581 goto free_dest_params;
582 }
583
584 scnprintf(ndev->hci_dev->init_data.session_id,
585 sizeof(ndev->hci_dev->init_data.session_id),
586 "%s%2x", "ST21BH", dev_num);
587
588 r = nci_hci_dev_session_init(ndev);
589 if (r != NCI_HCI_ANY_OK)
590 goto free_dest_params;
591
592 /*
593 * In factory mode, we prevent secure elements activation
594 * by disabling nfcee on the current HCI connection id.
595 * HCI will be used here only for proprietary commands.
596 */
597 if (test_bit(ST_NCI_FACTORY_MODE, &info->flags))
598 r = nci_nfcee_mode_set(ndev,
599 ndev->hci_dev->conn_info->dest_params->id,
600 NCI_NFCEE_DISABLE);
601 else
602 r = nci_nfcee_mode_set(ndev,
603 ndev->hci_dev->conn_info->dest_params->id,
604 NCI_NFCEE_ENABLE);
605
606 free_dest_params:
607 kfree(dest_params);
608
609 exit:
610 return r;
611 }
612
st_nci_discover_se(struct nci_dev * ndev)613 int st_nci_discover_se(struct nci_dev *ndev)
614 {
615 u8 white_list[2];
616 int r, wl_size = 0;
617 int se_count = 0;
618 struct st_nci_info *info = nci_get_drvdata(ndev);
619
620 pr_debug("st_nci_discover_se\n");
621
622 r = st_nci_hci_network_init(ndev);
623 if (r != 0)
624 return r;
625
626 if (test_bit(ST_NCI_FACTORY_MODE, &info->flags))
627 return 0;
628
629 if (info->se_info.se_status->is_uicc_present)
630 white_list[wl_size++] = ST_NCI_UICC_HOST_ID;
631 if (info->se_info.se_status->is_ese_present)
632 white_list[wl_size++] = ST_NCI_ESE_HOST_ID;
633
634 if (wl_size) {
635 r = nci_hci_set_param(ndev, NCI_HCI_ADMIN_GATE,
636 NCI_HCI_ADMIN_PARAM_WHITELIST,
637 white_list, wl_size);
638 if (r != NCI_HCI_ANY_OK)
639 return r;
640 }
641
642 if (info->se_info.se_status->is_uicc_present) {
643 nfc_add_se(ndev->nfc_dev, ST_NCI_UICC_HOST_ID, NFC_SE_UICC);
644 se_count++;
645 }
646
647 if (info->se_info.se_status->is_ese_present) {
648 nfc_add_se(ndev->nfc_dev, ST_NCI_ESE_HOST_ID, NFC_SE_EMBEDDED);
649 se_count++;
650 }
651
652 return !se_count;
653 }
654 EXPORT_SYMBOL_GPL(st_nci_discover_se);
655
st_nci_se_io(struct nci_dev * ndev,u32 se_idx,u8 * apdu,size_t apdu_length,se_io_cb_t cb,void * cb_context)656 int st_nci_se_io(struct nci_dev *ndev, u32 se_idx,
657 u8 *apdu, size_t apdu_length,
658 se_io_cb_t cb, void *cb_context)
659 {
660 struct st_nci_info *info = nci_get_drvdata(ndev);
661
662 pr_debug("\n");
663
664 switch (se_idx) {
665 case ST_NCI_ESE_HOST_ID:
666 info->se_info.cb = cb;
667 info->se_info.cb_context = cb_context;
668 mod_timer(&info->se_info.bwi_timer, jiffies +
669 msecs_to_jiffies(info->se_info.wt_timeout));
670 info->se_info.bwi_active = true;
671 return nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE,
672 ST_NCI_EVT_TRANSMIT_DATA, apdu,
673 apdu_length);
674 default:
675 return -ENODEV;
676 }
677 }
678 EXPORT_SYMBOL(st_nci_se_io);
679
st_nci_se_wt_timeout(struct timer_list * t)680 static void st_nci_se_wt_timeout(struct timer_list *t)
681 {
682 /*
683 * No answer from the secure element
684 * within the defined timeout.
685 * Let's send a reset request as recovery procedure.
686 * According to the situation, we first try to send a software reset
687 * to the secure element. If the next command is still not
688 * answering in time, we send to the CLF a secure element hardware
689 * reset request.
690 */
691 /* hardware reset managed through VCC_UICC_OUT power supply */
692 u8 param = 0x01;
693 struct st_nci_info *info = from_timer(info, t, se_info.bwi_timer);
694
695 pr_debug("\n");
696
697 info->se_info.bwi_active = false;
698
699 if (!info->se_info.xch_error) {
700 info->se_info.xch_error = true;
701 nci_hci_send_event(info->ndlc->ndev, ST_NCI_APDU_READER_GATE,
702 ST_NCI_EVT_SE_SOFT_RESET, NULL, 0);
703 } else {
704 info->se_info.xch_error = false;
705 nci_hci_send_event(info->ndlc->ndev, ST_NCI_DEVICE_MGNT_GATE,
706 ST_NCI_EVT_SE_HARD_RESET, ¶m, 1);
707 }
708 info->se_info.cb(info->se_info.cb_context, NULL, 0, -ETIME);
709 }
710
st_nci_se_activation_timeout(struct timer_list * t)711 static void st_nci_se_activation_timeout(struct timer_list *t)
712 {
713 struct st_nci_info *info = from_timer(info, t,
714 se_info.se_active_timer);
715
716 pr_debug("\n");
717
718 info->se_info.se_active = false;
719
720 complete(&info->se_info.req_completion);
721 }
722
st_nci_se_init(struct nci_dev * ndev,struct st_nci_se_status * se_status)723 int st_nci_se_init(struct nci_dev *ndev, struct st_nci_se_status *se_status)
724 {
725 struct st_nci_info *info = nci_get_drvdata(ndev);
726
727 init_completion(&info->se_info.req_completion);
728 /* initialize timers */
729 timer_setup(&info->se_info.bwi_timer, st_nci_se_wt_timeout, 0);
730 info->se_info.bwi_active = false;
731
732 timer_setup(&info->se_info.se_active_timer,
733 st_nci_se_activation_timeout, 0);
734 info->se_info.se_active = false;
735
736 info->se_info.xch_error = false;
737
738 info->se_info.wt_timeout =
739 ST_NCI_BWI_TO_TIMEOUT(ST_NCI_ATR_DEFAULT_BWI);
740
741 info->se_info.se_status = se_status;
742
743 return 0;
744 }
745 EXPORT_SYMBOL(st_nci_se_init);
746
st_nci_se_deinit(struct nci_dev * ndev)747 void st_nci_se_deinit(struct nci_dev *ndev)
748 {
749 struct st_nci_info *info = nci_get_drvdata(ndev);
750
751 if (info->se_info.bwi_active)
752 del_timer_sync(&info->se_info.bwi_timer);
753 if (info->se_info.se_active)
754 del_timer_sync(&info->se_info.se_active_timer);
755
756 info->se_info.se_active = false;
757 info->se_info.bwi_active = false;
758 }
759 EXPORT_SYMBOL(st_nci_se_deinit);
760
761
