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 = devm_kzalloc(dev, skb->len - 2, GFP_KERNEL); 335 if (!transaction) 336 return -ENOMEM; 337 338 transaction->aid_len = skb->data[1]; 339 memcpy(transaction->aid, &skb->data[2], transaction->aid_len); 340 341 /* Check next byte is PARAMETERS tag (82) */ 342 if (skb->data[transaction->aid_len + 2] != 343 NFC_EVT_TRANSACTION_PARAMS_TAG) 344 return -EPROTO; 345 346 transaction->params_len = skb->data[transaction->aid_len + 3]; 347 memcpy(transaction->params, skb->data + 348 transaction->aid_len + 4, transaction->params_len); 349 350 r = nfc_se_transaction(ndev->nfc_dev, host, transaction); 351 break; 352 default: 353 nfc_err(&ndev->nfc_dev->dev, "Unexpected event on connectivity gate\n"); 354 return 1; 355 } 356 kfree_skb(skb); 357 return r; 358 } 359 360 void st_nci_hci_event_received(struct nci_dev *ndev, u8 pipe, 361 u8 event, struct sk_buff *skb) 362 { 363 u8 gate = ndev->hci_dev->pipes[pipe].gate; 364 u8 host = ndev->hci_dev->pipes[pipe].host; 365 366 switch (gate) { 367 case NCI_HCI_ADMIN_GATE: 368 st_nci_hci_admin_event_received(ndev, event, skb); 369 break; 370 case ST_NCI_APDU_READER_GATE: 371 st_nci_hci_apdu_reader_event_received(ndev, event, skb); 372 break; 373 case ST_NCI_CONNECTIVITY_GATE: 374 st_nci_hci_connectivity_event_received(ndev, host, event, skb); 375 break; 376 } 377 } 378 EXPORT_SYMBOL_GPL(st_nci_hci_event_received); 379 380 void st_nci_hci_cmd_received(struct nci_dev *ndev, u8 pipe, u8 cmd, 381 struct sk_buff *skb) 382 { 383 struct st_nci_info *info = nci_get_drvdata(ndev); 384 u8 gate = ndev->hci_dev->pipes[pipe].gate; 385 386 pr_debug("cmd: %x\n", cmd); 387 388 switch (cmd) { 389 case NCI_HCI_ANY_OPEN_PIPE: 390 if (gate != ST_NCI_APDU_READER_GATE && 391 ndev->hci_dev->pipes[pipe].host != ST_NCI_UICC_HOST_ID) 392 ndev->hci_dev->count_pipes++; 393 394 if (ndev->hci_dev->count_pipes == 395 ndev->hci_dev->expected_pipes) { 396 del_timer_sync(&info->se_info.se_active_timer); 397 info->se_info.se_active = false; 398 ndev->hci_dev->count_pipes = 0; 399 complete(&info->se_info.req_completion); 400 } 401 break; 402 } 403 } 404 EXPORT_SYMBOL_GPL(st_nci_hci_cmd_received); 405 406 static int st_nci_control_se(struct nci_dev *ndev, u8 se_idx, 407 u8 state) 408 { 409 struct st_nci_info *info = nci_get_drvdata(ndev); 410 int r, i; 411 struct sk_buff *sk_host_list; 412 u8 host_id; 413 414 switch (se_idx) { 415 case ST_NCI_UICC_HOST_ID: 416 ndev->hci_dev->count_pipes = 0; 417 ndev->hci_dev->expected_pipes = ST_NCI_SE_COUNT_PIPE_UICC; 418 break; 419 case ST_NCI_ESE_HOST_ID: 420 ndev->hci_dev->count_pipes = 0; 421 ndev->hci_dev->expected_pipes = ST_NCI_SE_COUNT_PIPE_EMBEDDED; 422 break; 423 default: 424 return -EINVAL; 425 } 426 427 /* 428 * Wait for an EVT_HOT_PLUG in order to 429 * retrieve a relevant host list. 430 */ 431 reinit_completion(&info->se_info.req_completion); 432 r = nci_nfcee_mode_set(ndev, se_idx, state); 433 if (r != NCI_STATUS_OK) 434 return r; 435 436 mod_timer(&info->se_info.se_active_timer, jiffies + 437 msecs_to_jiffies(ST_NCI_SE_TO_HOT_PLUG)); 438 info->se_info.se_active = true; 439 440 /* Ignore return value and check in any case the host_list */ 441 wait_for_completion_interruptible(&info->se_info.req_completion); 442 443 /* There might be some "collision" after receiving a HOT_PLUG event 444 * This may cause the CLF to not answer to the next hci command. 445 * There is no possible synchronization to prevent this. 446 * Adding a small delay is the only way to solve the issue. 447 */ 448 if (info->se_info.se_status->is_ese_present && 449 info->se_info.se_status->is_uicc_present) 450 usleep_range(15000, 20000); 451 452 r = nci_hci_get_param(ndev, NCI_HCI_ADMIN_GATE, 453 NCI_HCI_ADMIN_PARAM_HOST_LIST, &sk_host_list); 454 if (r != NCI_HCI_ANY_OK) 455 return r; 456 457 for (i = 0; i < sk_host_list->len && 458 sk_host_list->data[i] != se_idx; i++) 459 ; 460 host_id = sk_host_list->data[i]; 461 kfree_skb(sk_host_list); 462 if (state == ST_NCI_SE_MODE_ON && host_id == se_idx) 463 return se_idx; 464 else if (state == ST_NCI_SE_MODE_OFF && host_id != se_idx) 465 return se_idx; 466 467 return -1; 468 } 469 470 int st_nci_disable_se(struct nci_dev *ndev, u32 se_idx) 471 { 472 int r; 473 474 pr_debug("st_nci_disable_se\n"); 475 476 /* 477 * According to upper layer, se_idx == NFC_SE_UICC when 478 * info->se_info.se_status->is_uicc_enable is true should never happen 479 * Same for eSE. 480 */ 481 r = st_nci_control_se(ndev, se_idx, ST_NCI_SE_MODE_OFF); 482 if (r < 0) { 483 /* Do best effort to release SWP */ 484 if (se_idx == NFC_SE_EMBEDDED) { 485 r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE, 486 ST_NCI_EVT_SE_END_OF_APDU_TRANSFER, 487 NULL, 0); 488 } 489 return r; 490 } 491 492 return 0; 493 } 494 EXPORT_SYMBOL_GPL(st_nci_disable_se); 495 496 int st_nci_enable_se(struct nci_dev *ndev, u32 se_idx) 497 { 498 int r; 499 500 pr_debug("st_nci_enable_se\n"); 501 502 /* 503 * According to upper layer, se_idx == NFC_SE_UICC when 504 * info->se_info.se_status->is_uicc_enable is true should never happen. 505 * Same for eSE. 506 */ 507 r = st_nci_control_se(ndev, se_idx, ST_NCI_SE_MODE_ON); 508 if (r == ST_NCI_ESE_HOST_ID) { 509 st_nci_se_get_atr(ndev); 510 r = nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE, 511 ST_NCI_EVT_SE_SOFT_RESET, NULL, 0); 512 } 513 514 if (r < 0) { 515 /* 516 * The activation procedure failed, the secure element 517 * is not connected. Remove from the list. 518 */ 519 nfc_remove_se(ndev->nfc_dev, se_idx); 520 return r; 521 } 522 523 return 0; 524 } 525 EXPORT_SYMBOL_GPL(st_nci_enable_se); 526 527 static int st_nci_hci_network_init(struct nci_dev *ndev) 528 { 529 struct st_nci_info *info = nci_get_drvdata(ndev); 530 struct core_conn_create_dest_spec_params *dest_params; 531 struct dest_spec_params spec_params; 532 struct nci_conn_info *conn_info; 533 int r, dev_num; 534 535 dest_params = 536 kzalloc(sizeof(struct core_conn_create_dest_spec_params) + 537 sizeof(struct dest_spec_params), GFP_KERNEL); 538 if (dest_params == NULL) { 539 r = -ENOMEM; 540 goto exit; 541 } 542 543 dest_params->type = NCI_DESTINATION_SPECIFIC_PARAM_NFCEE_TYPE; 544 dest_params->length = sizeof(struct dest_spec_params); 545 spec_params.id = ndev->hci_dev->nfcee_id; 546 spec_params.protocol = NCI_NFCEE_INTERFACE_HCI_ACCESS; 547 memcpy(dest_params->value, &spec_params, 548 sizeof(struct dest_spec_params)); 549 r = nci_core_conn_create(ndev, NCI_DESTINATION_NFCEE, 1, 550 sizeof(struct core_conn_create_dest_spec_params) + 551 sizeof(struct dest_spec_params), 552 dest_params); 553 if (r != NCI_STATUS_OK) 554 goto free_dest_params; 555 556 conn_info = ndev->hci_dev->conn_info; 557 if (!conn_info) 558 goto free_dest_params; 559 560 ndev->hci_dev->init_data.gate_count = ARRAY_SIZE(st_nci_gates); 561 memcpy(ndev->hci_dev->init_data.gates, st_nci_gates, 562 sizeof(st_nci_gates)); 563 564 /* 565 * Session id must include the driver name + i2c bus addr 566 * persistent info to discriminate 2 identical chips 567 */ 568 dev_num = find_first_zero_bit(dev_mask, ST_NCI_NUM_DEVICES); 569 if (dev_num >= ST_NCI_NUM_DEVICES) { 570 r = -ENODEV; 571 goto free_dest_params; 572 } 573 574 scnprintf(ndev->hci_dev->init_data.session_id, 575 sizeof(ndev->hci_dev->init_data.session_id), 576 "%s%2x", "ST21BH", dev_num); 577 578 r = nci_hci_dev_session_init(ndev); 579 if (r != NCI_HCI_ANY_OK) 580 goto free_dest_params; 581 582 /* 583 * In factory mode, we prevent secure elements activation 584 * by disabling nfcee on the current HCI connection id. 585 * HCI will be used here only for proprietary commands. 586 */ 587 if (test_bit(ST_NCI_FACTORY_MODE, &info->flags)) 588 r = nci_nfcee_mode_set(ndev, 589 ndev->hci_dev->conn_info->dest_params->id, 590 NCI_NFCEE_DISABLE); 591 else 592 r = nci_nfcee_mode_set(ndev, 593 ndev->hci_dev->conn_info->dest_params->id, 594 NCI_NFCEE_ENABLE); 595 596 free_dest_params: 597 kfree(dest_params); 598 599 exit: 600 return r; 601 } 602 603 int st_nci_discover_se(struct nci_dev *ndev) 604 { 605 u8 white_list[2]; 606 int r, wl_size = 0; 607 int se_count = 0; 608 struct st_nci_info *info = nci_get_drvdata(ndev); 609 610 pr_debug("st_nci_discover_se\n"); 611 612 r = st_nci_hci_network_init(ndev); 613 if (r != 0) 614 return r; 615 616 if (test_bit(ST_NCI_FACTORY_MODE, &info->flags)) 617 return 0; 618 619 if (info->se_info.se_status->is_uicc_present) 620 white_list[wl_size++] = ST_NCI_UICC_HOST_ID; 621 if (info->se_info.se_status->is_ese_present) 622 white_list[wl_size++] = ST_NCI_ESE_HOST_ID; 623 624 if (wl_size) { 625 r = nci_hci_set_param(ndev, NCI_HCI_ADMIN_GATE, 626 NCI_HCI_ADMIN_PARAM_WHITELIST, 627 white_list, wl_size); 628 if (r != NCI_HCI_ANY_OK) 629 return r; 630 } 631 632 if (info->se_info.se_status->is_uicc_present) { 633 nfc_add_se(ndev->nfc_dev, ST_NCI_UICC_HOST_ID, NFC_SE_UICC); 634 se_count++; 635 } 636 637 if (info->se_info.se_status->is_ese_present) { 638 nfc_add_se(ndev->nfc_dev, ST_NCI_ESE_HOST_ID, NFC_SE_EMBEDDED); 639 se_count++; 640 } 641 642 return !se_count; 643 } 644 EXPORT_SYMBOL_GPL(st_nci_discover_se); 645 646 int st_nci_se_io(struct nci_dev *ndev, u32 se_idx, 647 u8 *apdu, size_t apdu_length, 648 se_io_cb_t cb, void *cb_context) 649 { 650 struct st_nci_info *info = nci_get_drvdata(ndev); 651 652 pr_debug("\n"); 653 654 switch (se_idx) { 655 case ST_NCI_ESE_HOST_ID: 656 info->se_info.cb = cb; 657 info->se_info.cb_context = cb_context; 658 mod_timer(&info->se_info.bwi_timer, jiffies + 659 msecs_to_jiffies(info->se_info.wt_timeout)); 660 info->se_info.bwi_active = true; 661 return nci_hci_send_event(ndev, ST_NCI_APDU_READER_GATE, 662 ST_NCI_EVT_TRANSMIT_DATA, apdu, 663 apdu_length); 664 default: 665 return -ENODEV; 666 } 667 } 668 EXPORT_SYMBOL(st_nci_se_io); 669 670 static void st_nci_se_wt_timeout(struct timer_list *t) 671 { 672 /* 673 * No answer from the secure element 674 * within the defined timeout. 675 * Let's send a reset request as recovery procedure. 676 * According to the situation, we first try to send a software reset 677 * to the secure element. If the next command is still not 678 * answering in time, we send to the CLF a secure element hardware 679 * reset request. 680 */ 681 /* hardware reset managed through VCC_UICC_OUT power supply */ 682 u8 param = 0x01; 683 struct st_nci_info *info = from_timer(info, t, se_info.bwi_timer); 684 685 pr_debug("\n"); 686 687 info->se_info.bwi_active = false; 688 689 if (!info->se_info.xch_error) { 690 info->se_info.xch_error = true; 691 nci_hci_send_event(info->ndlc->ndev, ST_NCI_APDU_READER_GATE, 692 ST_NCI_EVT_SE_SOFT_RESET, NULL, 0); 693 } else { 694 info->se_info.xch_error = false; 695 nci_hci_send_event(info->ndlc->ndev, ST_NCI_DEVICE_MGNT_GATE, 696 ST_NCI_EVT_SE_HARD_RESET, ¶m, 1); 697 } 698 info->se_info.cb(info->se_info.cb_context, NULL, 0, -ETIME); 699 } 700 701 static void st_nci_se_activation_timeout(struct timer_list *t) 702 { 703 struct st_nci_info *info = from_timer(info, t, 704 se_info.se_active_timer); 705 706 pr_debug("\n"); 707 708 info->se_info.se_active = false; 709 710 complete(&info->se_info.req_completion); 711 } 712 713 int st_nci_se_init(struct nci_dev *ndev, struct st_nci_se_status *se_status) 714 { 715 struct st_nci_info *info = nci_get_drvdata(ndev); 716 717 init_completion(&info->se_info.req_completion); 718 /* initialize timers */ 719 timer_setup(&info->se_info.bwi_timer, st_nci_se_wt_timeout, 0); 720 info->se_info.bwi_active = false; 721 722 timer_setup(&info->se_info.se_active_timer, 723 st_nci_se_activation_timeout, 0); 724 info->se_info.se_active = false; 725 726 info->se_info.xch_error = false; 727 728 info->se_info.wt_timeout = 729 ST_NCI_BWI_TO_TIMEOUT(ST_NCI_ATR_DEFAULT_BWI); 730 731 info->se_info.se_status = se_status; 732 733 return 0; 734 } 735 EXPORT_SYMBOL(st_nci_se_init); 736 737 void st_nci_se_deinit(struct nci_dev *ndev) 738 { 739 struct st_nci_info *info = nci_get_drvdata(ndev); 740 741 if (info->se_info.bwi_active) 742 del_timer_sync(&info->se_info.bwi_timer); 743 if (info->se_info.se_active) 744 del_timer_sync(&info->se_info.se_active_timer); 745 746 info->se_info.se_active = false; 747 info->se_info.bwi_active = false; 748 } 749 EXPORT_SYMBOL(st_nci_se_deinit); 750 751