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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / nfc / st-nci / se.c
blobf25f1ec5f9e97a10aebc1b308180cb84beb4133e
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Secure Element driver for STMicroelectronics NFC NCI chip
4 *
5 * Copyright (C) 2014-2015 STMicroelectronics SAS. All rights reserved.
6 */
7
8 #include <linux/module.h>
9 #include <linux/nfc.h>
10 #include <linux/delay.h>
11 #include <net/nfc/nci.h>
12 #include <net/nfc/nci_core.h>
13
14 #include "st-nci.h"
15
16 struct st_nci_pipe_info {
17 u8 pipe_state;
18 u8 src_host_id;
19 u8 src_gate_id;
20 u8 dst_host_id;
21 u8 dst_gate_id;
22 } __packed;
23
24 /* Hosts */
25 #define ST_NCI_HOST_CONTROLLER_ID 0x00
26 #define ST_NCI_TERMINAL_HOST_ID 0x01
27 #define ST_NCI_UICC_HOST_ID 0x02
28 #define ST_NCI_ESE_HOST_ID 0xc0
29
30 /* Gates */
31 #define ST_NCI_APDU_READER_GATE 0xf0
32 #define ST_NCI_CONNECTIVITY_GATE 0x41
33
34 /* Pipes */
35 #define ST_NCI_DEVICE_MGNT_PIPE 0x02
36
37 /* Connectivity pipe only */
38 #define ST_NCI_SE_COUNT_PIPE_UICC 0x01
39 /* Connectivity + APDU Reader pipe */
40 #define ST_NCI_SE_COUNT_PIPE_EMBEDDED 0x02
41
42 #define ST_NCI_SE_TO_HOT_PLUG 1000 /* msecs */
43 #define ST_NCI_SE_TO_PIPES 2000
44
45 #define ST_NCI_EVT_HOT_PLUG_IS_INHIBITED(x) (x->data[0] & 0x80)
46
47 #define NCI_HCI_APDU_PARAM_ATR 0x01
48 #define NCI_HCI_ADMIN_PARAM_SESSION_IDENTITY 0x01
49 #define NCI_HCI_ADMIN_PARAM_WHITELIST 0x03
50 #define NCI_HCI_ADMIN_PARAM_HOST_LIST 0x04
51
52 #define ST_NCI_EVT_SE_HARD_RESET 0x20
53 #define ST_NCI_EVT_TRANSMIT_DATA 0x10
54 #define ST_NCI_EVT_WTX_REQUEST 0x11
55 #define ST_NCI_EVT_SE_SOFT_RESET 0x11
56 #define ST_NCI_EVT_SE_END_OF_APDU_TRANSFER 0x21
57 #define ST_NCI_EVT_HOT_PLUG 0x03
58
59 #define ST_NCI_SE_MODE_OFF 0x00
60 #define ST_NCI_SE_MODE_ON 0x01
61
62 #define ST_NCI_EVT_CONNECTIVITY 0x10
63 #define ST_NCI_EVT_TRANSACTION 0x12
64
65 #define ST_NCI_DM_GETINFO 0x13
66 #define ST_NCI_DM_GETINFO_PIPE_LIST 0x02
67 #define ST_NCI_DM_GETINFO_PIPE_INFO 0x01
68 #define ST_NCI_DM_PIPE_CREATED 0x02
69 #define ST_NCI_DM_PIPE_OPEN 0x04
70 #define ST_NCI_DM_RF_ACTIVE 0x80
71 #define ST_NCI_DM_DISCONNECT 0x30
72
73 #define ST_NCI_DM_IS_PIPE_OPEN(p) \
74 ((p & 0x0f) == (ST_NCI_DM_PIPE_CREATED | ST_NCI_DM_PIPE_OPEN))
75
76 #define ST_NCI_ATR_DEFAULT_BWI 0x04
77
78 /*
79 * WT = 2^BWI/10[s], convert into msecs and add a secure
80 * room by increasing by 2 this timeout
81 */
82 #define ST_NCI_BWI_TO_TIMEOUT(x) ((1 << x) * 200)
83 #define ST_NCI_ATR_GET_Y_FROM_TD(x) (x >> 4)
84
85 /* If TA is present bit 0 is set */
86 #define ST_NCI_ATR_TA_PRESENT(x) (x & 0x01)
87 /* If TB is present bit 1 is set */
88 #define ST_NCI_ATR_TB_PRESENT(x) (x & 0x02)
89
90 #define ST_NCI_NUM_DEVICES 256
91
92 static DECLARE_BITMAP(dev_mask, ST_NCI_NUM_DEVICES);
93
94 /* Here are the mandatory pipe for st_nci */
95 static struct nci_hci_gate st_nci_gates[] = {
96 {NCI_HCI_ADMIN_GATE, NCI_HCI_ADMIN_PIPE,
97 ST_NCI_HOST_CONTROLLER_ID},
98 {NCI_HCI_LINK_MGMT_GATE, NCI_HCI_LINK_MGMT_PIPE,
99 ST_NCI_HOST_CONTROLLER_ID},
100 {ST_NCI_DEVICE_MGNT_GATE, ST_NCI_DEVICE_MGNT_PIPE,
101 ST_NCI_HOST_CONTROLLER_ID},
102
103 {NCI_HCI_IDENTITY_MGMT_GATE, NCI_HCI_INVALID_PIPE,
104 ST_NCI_HOST_CONTROLLER_ID},
105
106 /* Secure element pipes are created by secure element host */
107 {ST_NCI_CONNECTIVITY_GATE, NCI_HCI_DO_NOT_OPEN_PIPE,
108 ST_NCI_HOST_CONTROLLER_ID},
109 {ST_NCI_APDU_READER_GATE, NCI_HCI_DO_NOT_OPEN_PIPE,
110 ST_NCI_HOST_CONTROLLER_ID},
111 };
112
113 static u8 st_nci_se_get_bwi(struct nci_dev *ndev)
114 {
115 int i;
116 u8 td;
117 struct st_nci_info *info = nci_get_drvdata(ndev);
118
119 /* Bits 8 to 5 of the first TB for T=1 encode BWI from zero to nine */
120 for (i = 1; i < ST_NCI_ESE_MAX_LENGTH; i++) {
121 td = ST_NCI_ATR_GET_Y_FROM_TD(info->se_info.atr[i]);
122 if (ST_NCI_ATR_TA_PRESENT(td))
123 i++;
124 if (ST_NCI_ATR_TB_PRESENT(td)) {
125 i++;
126 return info->se_info.atr[i] >> 4;
127 }
128 }
129 return ST_NCI_ATR_DEFAULT_BWI;
130 }
131
132 static void st_nci_se_get_atr(struct nci_dev *ndev)
133 {
134 struct st_nci_info *info = nci_get_drvdata(ndev);
135 int r;
136 struct sk_buff *skb;
137
138 r = nci_hci_get_param(ndev, ST_NCI_APDU_READER_GATE,
139 NCI_HCI_APDU_PARAM_ATR, &skb);
140 if (r < 0)
141 return;
142
143 if (skb->len <= ST_NCI_ESE_MAX_LENGTH) {
144 memcpy(info->se_info.atr, skb->data, skb->len);
145
146 info->se_info.wt_timeout =
147 ST_NCI_BWI_TO_TIMEOUT(st_nci_se_get_bwi(ndev));
148 }
149 kfree_skb(skb);
150 }
151
152 int st_nci_hci_load_session(struct nci_dev *ndev)
153 {
154 int i, j, r;
155 struct sk_buff *skb_pipe_list, *skb_pipe_info;
156 struct st_nci_pipe_info *dm_pipe_info;
157 u8 pipe_list[] = { ST_NCI_DM_GETINFO_PIPE_LIST,
158 ST_NCI_TERMINAL_HOST_ID};
159 u8 pipe_info[] = { ST_NCI_DM_GETINFO_PIPE_INFO,
160 ST_NCI_TERMINAL_HOST_ID, 0};
161
162 /* On ST_NCI device pipes number are dynamics
163 * If pipes are already created, hci_dev_up will fail.
164 * Doing a clear all pipe is a bad idea because:
165 * - It does useless EEPROM cycling
166 * - It might cause issue for secure elements support
167 * (such as removing connectivity or APDU reader pipe)
168 * A better approach on ST_NCI is to:
169 * - get a pipe list for each host.
170 * (eg: ST_NCI_HOST_CONTROLLER_ID for now).
171 * (TODO Later on UICC HOST and eSE HOST)
172 * - get pipe information
173 * - match retrieved pipe list in st_nci_gates
174 * ST_NCI_DEVICE_MGNT_GATE is a proprietary gate
175 * with ST_NCI_DEVICE_MGNT_PIPE.
176 * Pipe can be closed and need to be open.
177 */
178 r = nci_hci_connect_gate(ndev, ST_NCI_HOST_CONTROLLER_ID,
179 ST_NCI_DEVICE_MGNT_GATE,
180 ST_NCI_DEVICE_MGNT_PIPE);
181 if (r < 0)
182 return r;
183
184 /* Get pipe list */
185 r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
186 ST_NCI_DM_GETINFO, pipe_list, sizeof(pipe_list),
187 &skb_pipe_list);
188 if (r < 0)
189 return r;
190
191 /* Complete the existing gate_pipe table */
192 for (i = 0; i < skb_pipe_list->len; i++) {
193 pipe_info[2] = skb_pipe_list->data[i];
194 r = nci_hci_send_cmd(ndev, ST_NCI_DEVICE_MGNT_GATE,
195 ST_NCI_DM_GETINFO, pipe_info,
196 sizeof(pipe_info), &skb_pipe_info);
197
198 if (r)
199 continue;
200
201 /*
202 * Match pipe ID and gate ID
203 * Output format from ST21NFC_DM_GETINFO is:
204 * - pipe state (1byte)
205 * - source hid (1byte)
206 * - source gid (1byte)
207 * - destination hid (1byte)
208 * - destination gid (1byte)
209 */
210 dm_pipe_info = (struct st_nci_pipe_info *)skb_pipe_info->data;
211 if (dm_pipe_info->dst_gate_id == ST_NCI_APDU_READER_GATE &&
212 dm_pipe_info->src_host_id == ST_NCI_UICC_HOST_ID) {
213 pr_err("Unexpected apdu_reader pipe on host %x\n",
214 dm_pipe_info->src_host_id);
215 kfree_skb(skb_pipe_info);
216 continue;
217 }
218
219 for (j = 3; (j < ARRAY_SIZE(st_nci_gates)) &&
220 (st_nci_gates[j].gate != dm_pipe_info->dst_gate_id); j++)
221 ;
222
223 if (j < ARRAY_SIZE(st_nci_gates) &&
224 st_nci_gates[j].gate == dm_pipe_info->dst_gate_id &&
225 ST_NCI_DM_IS_PIPE_OPEN(dm_pipe_info->pipe_state)) {
226 ndev->hci_dev->init_data.gates[j].pipe = pipe_info[2];
227
228 ndev->hci_dev->gate2pipe[st_nci_gates[j].gate] =
229 pipe_info[2];
230 ndev->hci_dev->pipes[pipe_info[2]].gate =
231 st_nci_gates[j].gate;
232 ndev->hci_dev->pipes[pipe_info[2]].host =
233 dm_pipe_info->src_host_id;
234 }
235 kfree_skb(skb_pipe_info);
236 }
237
238 /*
239 * 3 gates have a well known pipe ID. Only NCI_HCI_LINK_MGMT_GATE
240 * is not yet open at this stage.
241 */
242 r = nci_hci_connect_gate(ndev, ST_NCI_HOST_CONTROLLER_ID,
243 NCI_HCI_LINK_MGMT_GATE,
244 NCI_HCI_LINK_MGMT_PIPE);
245
246 kfree_skb(skb_pipe_list);
247 return r;
248 }
249 EXPORT_SYMBOL_GPL(st_nci_hci_load_session);
250
251 static void st_nci_hci_admin_event_received(struct nci_dev *ndev,
252 u8 event, struct sk_buff *skb)
253 {
254 struct st_nci_info *info = nci_get_drvdata(ndev);
255
256 switch (event) {
257 case ST_NCI_EVT_HOT_PLUG:
258 if (info->se_info.se_active) {
259 if (!ST_NCI_EVT_HOT_PLUG_IS_INHIBITED(skb)) {
260 del_timer_sync(&info->se_info.se_active_timer);
261 info->se_info.se_active = false;
262 complete(&info->se_info.req_completion);
263 } else {
264 mod_timer(&info->se_info.se_active_timer,
265 jiffies +
266 msecs_to_jiffies(ST_NCI_SE_TO_PIPES));
267 }
268 }
269 break;
270 default:
271 nfc_err(&ndev->nfc_dev->dev, "Unexpected event on admin gate\n");
272 }
273 }
274
275 static int st_nci_hci_apdu_reader_event_received(struct nci_dev *ndev,
276 u8 event,
277 struct sk_buff *skb)
278 {
279 int r = 0;
280 struct st_nci_info *info = nci_get_drvdata(ndev);
281
282 pr_debug("apdu reader gate event: %x\n", event);
283
284 switch (event) {
285 case ST_NCI_EVT_TRANSMIT_DATA:
286 del_timer_sync(&info->se_info.bwi_timer);
287 info->se_info.bwi_active = false;
288 info->se_info.cb(info->se_info.cb_context,
289 skb->data, skb->len, 0);
290 break;
291 case ST_NCI_EVT_WTX_REQUEST:
292 mod_timer(&info->se_info.bwi_timer, jiffies +
293 msecs_to_jiffies(info->se_info.wt_timeout));
294 break;
295 default:
296 nfc_err(&ndev->nfc_dev->dev, "Unexpected event on apdu reader gate\n");
297 return 1;
298 }
299
300 kfree_skb(skb);
301 return r;
302 }
303
304 /*
305 * Returns:
306 * <= 0: driver handled the event, skb consumed
307 * 1: driver does not handle the event, please do standard processing
308 */
309 static int st_nci_hci_connectivity_event_received(struct nci_dev *ndev,
310 u8 host, u8 event,
311 struct sk_buff *skb)
312 {
313 int r = 0;
314 struct device *dev = &ndev->nfc_dev->dev;
315 struct nfc_evt_transaction *transaction;
316
317 pr_debug("connectivity gate event: %x\n", event);
318
319 switch (event) {
320 case ST_NCI_EVT_CONNECTIVITY:
321 r = nfc_se_connectivity(ndev->nfc_dev, host);
322 break;
323 case ST_NCI_EVT_TRANSACTION:
324 /* According to specification etsi 102 622
325 * 11.2.2.4 EVT_TRANSACTION Table 52
326 * Description Tag Length
327 * AID 81 5 to 16
328 * PARAMETERS 82 0 to 255
329 */
330 if (skb->len < NFC_MIN_AID_LENGTH + 2 &&
331 skb->data[0] != NFC_EVT_TRANSACTION_AID_TAG)
332 return -EPROTO;
333
334 transaction = (struct nfc_evt_transaction *)devm_kzalloc(dev,
335 skb->len - 2, GFP_KERNEL);
336 if (!transaction)
337 return -ENOMEM;
338
339 transaction->aid_len = skb->data[1];
340 memcpy(transaction->aid, &skb->data[2], transaction->aid_len);
341
342 /* Check next byte is PARAMETERS tag (82) */
343 if (skb->data[transaction->aid_len + 2] !=
344 NFC_EVT_TRANSACTION_PARAMS_TAG)
345 return -EPROTO;
346
347 transaction->params_len = skb->data[transaction->aid_len + 3];
348 memcpy(transaction->params, skb->data +
349 transaction->aid_len + 4, transaction->params_len);
350
351 r = nfc_se_transaction(ndev->nfc_dev, host, transaction);
352 break;
353 default:
354 nfc_err(&ndev->nfc_dev->dev, "Unexpected event on connectivity gate\n");
355 return 1;
356 }
357 kfree_skb(skb);
358 return r;
359 }
360
361 void st_nci_hci_event_received(struct nci_dev *ndev, u8 pipe,
362 u8 event, struct sk_buff *skb)
363 {
364 u8 gate = ndev->hci_dev->pipes[pipe].gate;
365 u8 host = ndev->hci_dev->pipes[pipe].host;
366
367 switch (gate) {
368 case NCI_HCI_ADMIN_GATE:
369 st_nci_hci_admin_event_received(ndev, event, skb);
370 break;
371 case ST_NCI_APDU_READER_GATE:
372 st_nci_hci_apdu_reader_event_received(ndev, event, skb);
373 break;
374 case ST_NCI_CONNECTIVITY_GATE:
375 st_nci_hci_connectivity_event_received(ndev, host, event, skb);
376 break;
377 }
378 }
379 EXPORT_SYMBOL_GPL(st_nci_hci_event_received);
380
381 void st_nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe, u8 cmd,
382 struct sk_buff *skb)
383 {
384 struct st_nci_info *info = nci_get_drvdata(ndev);
385 u8 gate = ndev->hci_dev->pipes[pipe].gate;
386
387 pr_debug("cmd: %x\n", cmd);
388
389 switch (cmd) {
390 case NCI_HCI_ANY_OPEN_PIPE:
391 if (gate != ST_NCI_APDU_READER_GATE &&
392 ndev->hci_dev->pipes[pipe].host != ST_NCI_UICC_HOST_ID)
393 ndev->hci_dev->count_pipes++;
394
395 if (ndev->hci_dev->count_pipes ==
396 ndev->hci_dev->expected_pipes) {
397 del_timer_sync(&info->se_info.se_active_timer);
398 info->se_info.se_active = false;
399 ndev->hci_dev->count_pipes = 0;
400 complete(&info->se_info.req_completion);
401 }
402 break;
403 }
404 }
405 EXPORT_SYMBOL_GPL(st_nci_hci_cmd_received);
406
407 static int st_nci_control_se(struct nci_dev *ndev, u8 se_idx,
408 u8 state)
409 {
410 struct st_nci_info *info = nci_get_drvdata(ndev);
411 int r, i;
412 struct sk_buff *sk_host_list;
413 u8 host_id;
414
415 switch (se_idx) {
416 case ST_NCI_UICC_HOST_ID:
417 ndev->hci_dev->count_pipes = 0;
418 ndev->hci_dev->expected_pipes = ST_NCI_SE_COUNT_PIPE_UICC;
419 break;
420 case ST_NCI_ESE_HOST_ID:
421 ndev->hci_dev->count_pipes = 0;
422 ndev->hci_dev->expected_pipes = ST_NCI_SE_COUNT_PIPE_EMBEDDED;
423 break;
424 default:
425 return -EINVAL;
426 }
427
428 /*
429 * Wait for an EVT_HOT_PLUG in order to
430 * retrieve a relevant host list.
431 */
432 reinit_completion(&info->se_info.req_completion);
433 r = nci_nfcee_mode_set(ndev, se_idx, state);
434 if (r != NCI_STATUS_OK)
435 return r;
436
437 mod_timer(&info->se_info.se_active_timer, jiffies +
438 msecs_to_jiffies(ST_NCI_SE_TO_HOT_PLUG));
439 info->se_info.se_active = true;
440
441 /* Ignore return value and check in any case the host_list */
442 wait_for_completion_interruptible(&info->se_info.req_completion);
443
444 /* There might be some "collision" after receiving a HOT_PLUG event
445 * This may cause the CLF to not answer to the next hci command.
446 * There is no possible synchronization to prevent this.
447 * Adding a small delay is the only way to solve the issue.
448 */
449 if (info->se_info.se_status->is_ese_present &&
450 info->se_info.se_status->is_uicc_present)
451 usleep_range(15000, 20000);
452
453 r = nci_hci_get_param(ndev, NCI_HCI_ADMIN_GATE,
454 NCI_HCI_ADMIN_PARAM_HOST_LIST, &sk_host_list);
455 if (r != NCI_HCI_ANY_OK)
456 return r;
457
458 for (i = 0; i < sk_host_list->len &&
459 sk_host_list->data[i] != se_idx; i++)
460 ;
461 host_id = sk_host_list->data[i];
462 kfree_skb(sk_host_list);
463 if (state == ST_NCI_SE_MODE_ON && host_id == se_idx)
464 return se_idx;
465 else if (state == ST_NCI_SE_MODE_OFF && host_id != se_idx)
466 return se_idx;
467
468 return -1;
469 }
470
471 int st_nci_disable_se(struct nci_dev *ndev, u32 se_idx)
472 {
473 int r;
474
475 pr_debug("st_nci_disable_se\n");
476
477 /*
478 * According to upper layer, se_idx == NFC_SE_UICC when
479 * info->se_info.se_status->is_uicc_enable is true should never happen
480 * Same for eSE.
481 */
482 r = st_nci_control_se(ndev, se_idx, ST_NCI_SE_MODE_OFF);
483 if (r < 0) {
484 /* Do best effort to release SWP */
485 if (se_idx == NFC_SE_EMBEDDED) {
486 r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE,
487 ST_NCI_EVT_SE_END_OF_APDU_TRANSFER,
488 NULL, 0);
489 }
490 return r;
491 }
492
493 return 0;
494 }
495 EXPORT_SYMBOL_GPL(st_nci_disable_se);
496
497 int st_nci_enable_se(struct nci_dev *ndev, u32 se_idx)
498 {
499 int r;
500
501 pr_debug("st_nci_enable_se\n");
502
503 /*
504 * According to upper layer, se_idx == NFC_SE_UICC when
505 * info->se_info.se_status->is_uicc_enable is true should never happen.
506 * Same for eSE.
507 */
508 r = st_nci_control_se(ndev, se_idx, ST_NCI_SE_MODE_ON);
509 if (r == ST_NCI_ESE_HOST_ID) {
510 st_nci_se_get_atr(ndev);
511 r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE,
512 ST_NCI_EVT_SE_SOFT_RESET, NULL, 0);
513 }
514
515 if (r < 0) {
516 /*
517 * The activation procedure failed, the secure element
518 * is not connected. Remove from the list.
519 */
520 nfc_remove_se(ndev->nfc_dev, se_idx);
521 return r;
522 }
523
524 return 0;
525 }
526 EXPORT_SYMBOL_GPL(st_nci_enable_se);
527
528 static int st_nci_hci_network_init(struct nci_dev *ndev)
529 {
530 struct st_nci_info *info = nci_get_drvdata(ndev);
531 struct core_conn_create_dest_spec_params *dest_params;
532 struct dest_spec_params spec_params;
533 struct nci_conn_info *conn_info;
534 int r, dev_num;
535
536 dest_params =
537 kzalloc(sizeof(struct core_conn_create_dest_spec_params) +
538 sizeof(struct dest_spec_params), GFP_KERNEL);
539 if (dest_params == NULL) {
540 r = -ENOMEM;
541 goto exit;
542 }
543
544 dest_params->type = NCI_DESTINATION_SPECIFIC_PARAM_NFCEE_TYPE;
545 dest_params->length = sizeof(struct dest_spec_params);
546 spec_params.id = ndev->hci_dev->nfcee_id;
547 spec_params.protocol = NCI_NFCEE_INTERFACE_HCI_ACCESS;
548 memcpy(dest_params->value, &spec_params,
549 sizeof(struct dest_spec_params));
550 r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCEE, 1,
551 sizeof(struct core_conn_create_dest_spec_params) +
552 sizeof(struct dest_spec_params),
553 dest_params);
554 if (r != NCI_STATUS_OK)
555 goto free_dest_params;
556
557 conn_info = ndev->hci_dev->conn_info;
558 if (!conn_info)
559 goto free_dest_params;
560
561 ndev->hci_dev->init_data.gate_count = ARRAY_SIZE(st_nci_gates);
562 memcpy(ndev->hci_dev->init_data.gates, st_nci_gates,
563 sizeof(st_nci_gates));
564
565 /*
566 * Session id must include the driver name + i2c bus addr
567 * persistent info to discriminate 2 identical chips
568 */
569 dev_num = find_first_zero_bit(dev_mask, ST_NCI_NUM_DEVICES);
570 if (dev_num >= ST_NCI_NUM_DEVICES) {
571 r = -ENODEV;
572 goto free_dest_params;
573 }
574
575 scnprintf(ndev->hci_dev->init_data.session_id,
576 sizeof(ndev->hci_dev->init_data.session_id),
577 "%s%2x", "ST21BH", dev_num);
578
579 r = nci_hci_dev_session_init(ndev);
580 if (r != NCI_HCI_ANY_OK)
581 goto free_dest_params;
582
583 /*
584 * In factory mode, we prevent secure elements activation
585 * by disabling nfcee on the current HCI connection id.
586 * HCI will be used here only for proprietary commands.
587 */
588 if (test_bit(ST_NCI_FACTORY_MODE, &info->flags))
589 r = nci_nfcee_mode_set(ndev,
590 ndev->hci_dev->conn_info->dest_params->id,
591 NCI_NFCEE_DISABLE);
592 else
593 r = nci_nfcee_mode_set(ndev,
594 ndev->hci_dev->conn_info->dest_params->id,
595 NCI_NFCEE_ENABLE);
596
597 free_dest_params:
598 kfree(dest_params);
599
600 exit:
601 return r;
602 }
603
604 int st_nci_discover_se(struct nci_dev *ndev)
605 {
606 u8 white_list[2];
607 int r, wl_size = 0;
608 int se_count = 0;
609 struct st_nci_info *info = nci_get_drvdata(ndev);
610
611 pr_debug("st_nci_discover_se\n");
612
613 r = st_nci_hci_network_init(ndev);
614 if (r != 0)
615 return r;
616
617 if (test_bit(ST_NCI_FACTORY_MODE, &info->flags))
618 return 0;
619
620 if (info->se_info.se_status->is_uicc_present)
621 white_list[wl_size++] = ST_NCI_UICC_HOST_ID;
622 if (info->se_info.se_status->is_ese_present)
623 white_list[wl_size++] = ST_NCI_ESE_HOST_ID;
624
625 if (wl_size) {
626 r = nci_hci_set_param(ndev, NCI_HCI_ADMIN_GATE,
627 NCI_HCI_ADMIN_PARAM_WHITELIST,
628 white_list, wl_size);
629 if (r != NCI_HCI_ANY_OK)
630 return r;
631 }
632
633 if (info->se_info.se_status->is_uicc_present) {
634 nfc_add_se(ndev->nfc_dev, ST_NCI_UICC_HOST_ID, NFC_SE_UICC);
635 se_count++;
636 }
637
638 if (info->se_info.se_status->is_ese_present) {
639 nfc_add_se(ndev->nfc_dev, ST_NCI_ESE_HOST_ID, NFC_SE_EMBEDDED);
640 se_count++;
641 }
642
643 return !se_count;
644 }
645 EXPORT_SYMBOL_GPL(st_nci_discover_se);
646
647 int st_nci_se_io(struct nci_dev *ndev, u32 se_idx,
648 u8 *apdu, size_t apdu_length,
649 se_io_cb_t cb, void *cb_context)
650 {
651 struct st_nci_info *info = nci_get_drvdata(ndev);
652
653 pr_debug("\n");
654
655 switch (se_idx) {
656 case ST_NCI_ESE_HOST_ID:
657 info->se_info.cb = cb;
658 info->se_info.cb_context = cb_context;
659 mod_timer(&info->se_info.bwi_timer, jiffies +
660 msecs_to_jiffies(info->se_info.wt_timeout));
661 info->se_info.bwi_active = true;
662 return nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE,
663 ST_NCI_EVT_TRANSMIT_DATA, apdu,
664 apdu_length);
665 default:
666 return -ENODEV;
667 }
668 }
669 EXPORT_SYMBOL(st_nci_se_io);
670
671 static void st_nci_se_wt_timeout(struct timer_list *t)
672 {
673 /*
674 * No answer from the secure element
675 * within the defined timeout.
676 * Let's send a reset request as recovery procedure.
677 * According to the situation, we first try to send a software reset
678 * to the secure element. If the next command is still not
679 * answering in time, we send to the CLF a secure element hardware
680 * reset request.
681 */
682 /* hardware reset managed through VCC_UICC_OUT power supply */
683 u8 param = 0x01;
684 struct st_nci_info *info = from_timer(info, t, se_info.bwi_timer);
685
686 pr_debug("\n");
687
688 info->se_info.bwi_active = false;
689
690 if (!info->se_info.xch_error) {
691 info->se_info.xch_error = true;
692 nci_hci_send_event(info->ndlc->ndev, ST_NCI_APDU_READER_GATE,
693 ST_NCI_EVT_SE_SOFT_RESET, NULL, 0);
694 } else {
695 info->se_info.xch_error = false;
696 nci_hci_send_event(info->ndlc->ndev, ST_NCI_DEVICE_MGNT_GATE,
697 ST_NCI_EVT_SE_HARD_RESET, &param, 1);
698 }
699 info->se_info.cb(info->se_info.cb_context, NULL, 0, -ETIME);
700 }
701
702 static void st_nci_se_activation_timeout(struct timer_list *t)
703 {
704 struct st_nci_info *info = from_timer(info, t,
705 se_info.se_active_timer);
706
707 pr_debug("\n");
708
709 info->se_info.se_active = false;
710
711 complete(&info->se_info.req_completion);
712 }
713
714 int st_nci_se_init(struct nci_dev *ndev, struct st_nci_se_status *se_status)
715 {
716 struct st_nci_info *info = nci_get_drvdata(ndev);
717
718 init_completion(&info->se_info.req_completion);
719 /* initialize timers */
720 timer_setup(&info->se_info.bwi_timer, st_nci_se_wt_timeout, 0);
721 info->se_info.bwi_active = false;
722
723 timer_setup(&info->se_info.se_active_timer,
724 st_nci_se_activation_timeout, 0);
725 info->se_info.se_active = false;
726
727 info->se_info.xch_error = false;
728
729 info->se_info.wt_timeout =
730 ST_NCI_BWI_TO_TIMEOUT(ST_NCI_ATR_DEFAULT_BWI);
731
732 info->se_info.se_status = se_status;
733
734 return 0;
735 }
736 EXPORT_SYMBOL(st_nci_se_init);
737
738 void st_nci_se_deinit(struct nci_dev *ndev)
739 {
740 struct st_nci_info *info = nci_get_drvdata(ndev);
741
742 if (info->se_info.bwi_active)
743 del_timer_sync(&info->se_info.bwi_timer);
744 if (info->se_info.se_active)
745 del_timer_sync(&info->se_info.se_active_timer);
746
747 info->se_info.se_active = false;
748 info->se_info.bwi_active = false;
749 }
750 EXPORT_SYMBOL(st_nci_se_deinit);
751
Linux with added FPC-III support