1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * The NFC Controller Interface is the communication protocol between an 4 * NFC Controller (NFCC) and a Device Host (DH). 5 * 6 * Copyright (C) 2014 Marvell International Ltd. 7 * Copyright (C) 2011 Texas Instruments, Inc. 8 * 9 * Written by Ilan Elias <ilane@ti.com> 10 * 11 * Acknowledgements: 12 * This file is based on hci_event.c, which was written 13 * by Maxim Krasnyansky. 14 */ 15 16 #define pr_fmt(fmt) KBUILD_MODNAME ": %s: " fmt, __func__ 17 18 #include <linux/types.h> 19 #include <linux/interrupt.h> 20 #include <linux/bitops.h> 21 #include <linux/skbuff.h> 22 23 #include "../nfc.h" 24 #include <net/nfc/nci.h> 25 #include <net/nfc/nci_core.h> 26 #include <linux/nfc.h> 27 28 /* Handle NCI Notification packets */ 29 30 static void nci_core_conn_credits_ntf_packet(struct nci_dev *ndev, 31 struct sk_buff *skb) 32 { 33 struct nci_core_conn_credit_ntf *ntf = (void *) skb->data; 34 struct nci_conn_info *conn_info; 35 int i; 36 37 pr_debug("num_entries %d\n", ntf->num_entries); 38 39 if (ntf->num_entries > NCI_MAX_NUM_CONN) 40 ntf->num_entries = NCI_MAX_NUM_CONN; 41 42 /* update the credits */ 43 for (i = 0; i < ntf->num_entries; i++) { 44 ntf->conn_entries[i].conn_id = 45 nci_conn_id(&ntf->conn_entries[i].conn_id); 46 47 pr_debug("entry[%d]: conn_id %d, credits %d\n", 48 i, ntf->conn_entries[i].conn_id, 49 ntf->conn_entries[i].credits); 50 51 conn_info = nci_get_conn_info_by_conn_id(ndev, 52 ntf->conn_entries[i].conn_id); 53 if (!conn_info) 54 return; 55 56 atomic_add(ntf->conn_entries[i].credits, 57 &conn_info->credits_cnt); 58 } 59 60 /* trigger the next tx */ 61 if (!skb_queue_empty(&ndev->tx_q)) 62 queue_work(ndev->tx_wq, &ndev->tx_work); 63 } 64 65 static void nci_core_generic_error_ntf_packet(struct nci_dev *ndev, 66 struct sk_buff *skb) 67 { 68 __u8 status = skb->data[0]; 69 70 pr_debug("status 0x%x\n", status); 71 72 if (atomic_read(&ndev->state) == NCI_W4_HOST_SELECT) { 73 /* Activation failed, so complete the request 74 (the state remains the same) */ 75 nci_req_complete(ndev, status); 76 } 77 } 78 79 static void nci_core_conn_intf_error_ntf_packet(struct nci_dev *ndev, 80 struct sk_buff *skb) 81 { 82 struct nci_core_intf_error_ntf *ntf = (void *) skb->data; 83 84 ntf->conn_id = nci_conn_id(&ntf->conn_id); 85 86 pr_debug("status 0x%x, conn_id %d\n", ntf->status, ntf->conn_id); 87 88 /* complete the data exchange transaction, if exists */ 89 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) 90 nci_data_exchange_complete(ndev, NULL, ntf->conn_id, -EIO); 91 } 92 93 static __u8 *nci_extract_rf_params_nfca_passive_poll(struct nci_dev *ndev, 94 struct rf_tech_specific_params_nfca_poll *nfca_poll, 95 __u8 *data) 96 { 97 nfca_poll->sens_res = __le16_to_cpu(*((__le16 *)data)); 98 data += 2; 99 100 nfca_poll->nfcid1_len = min_t(__u8, *data++, NFC_NFCID1_MAXSIZE); 101 102 pr_debug("sens_res 0x%x, nfcid1_len %d\n", 103 nfca_poll->sens_res, nfca_poll->nfcid1_len); 104 105 memcpy(nfca_poll->nfcid1, data, nfca_poll->nfcid1_len); 106 data += nfca_poll->nfcid1_len; 107 108 nfca_poll->sel_res_len = *data++; 109 110 if (nfca_poll->sel_res_len != 0) 111 nfca_poll->sel_res = *data++; 112 113 pr_debug("sel_res_len %d, sel_res 0x%x\n", 114 nfca_poll->sel_res_len, 115 nfca_poll->sel_res); 116 117 return data; 118 } 119 120 static __u8 *nci_extract_rf_params_nfcb_passive_poll(struct nci_dev *ndev, 121 struct rf_tech_specific_params_nfcb_poll *nfcb_poll, 122 __u8 *data) 123 { 124 nfcb_poll->sensb_res_len = min_t(__u8, *data++, NFC_SENSB_RES_MAXSIZE); 125 126 pr_debug("sensb_res_len %d\n", nfcb_poll->sensb_res_len); 127 128 memcpy(nfcb_poll->sensb_res, data, nfcb_poll->sensb_res_len); 129 data += nfcb_poll->sensb_res_len; 130 131 return data; 132 } 133 134 static __u8 *nci_extract_rf_params_nfcf_passive_poll(struct nci_dev *ndev, 135 struct rf_tech_specific_params_nfcf_poll *nfcf_poll, 136 __u8 *data) 137 { 138 nfcf_poll->bit_rate = *data++; 139 nfcf_poll->sensf_res_len = min_t(__u8, *data++, NFC_SENSF_RES_MAXSIZE); 140 141 pr_debug("bit_rate %d, sensf_res_len %d\n", 142 nfcf_poll->bit_rate, nfcf_poll->sensf_res_len); 143 144 memcpy(nfcf_poll->sensf_res, data, nfcf_poll->sensf_res_len); 145 data += nfcf_poll->sensf_res_len; 146 147 return data; 148 } 149 150 static __u8 *nci_extract_rf_params_nfcv_passive_poll(struct nci_dev *ndev, 151 struct rf_tech_specific_params_nfcv_poll *nfcv_poll, 152 __u8 *data) 153 { 154 ++data; 155 nfcv_poll->dsfid = *data++; 156 memcpy(nfcv_poll->uid, data, NFC_ISO15693_UID_MAXSIZE); 157 data += NFC_ISO15693_UID_MAXSIZE; 158 return data; 159 } 160 161 static __u8 *nci_extract_rf_params_nfcf_passive_listen(struct nci_dev *ndev, 162 struct rf_tech_specific_params_nfcf_listen *nfcf_listen, 163 __u8 *data) 164 { 165 nfcf_listen->local_nfcid2_len = min_t(__u8, *data++, 166 NFC_NFCID2_MAXSIZE); 167 memcpy(nfcf_listen->local_nfcid2, data, nfcf_listen->local_nfcid2_len); 168 data += nfcf_listen->local_nfcid2_len; 169 170 return data; 171 } 172 173 static __u32 nci_get_prop_rf_protocol(struct nci_dev *ndev, __u8 rf_protocol) 174 { 175 if (ndev->ops->get_rfprotocol) 176 return ndev->ops->get_rfprotocol(ndev, rf_protocol); 177 return 0; 178 } 179 180 static int nci_add_new_protocol(struct nci_dev *ndev, 181 struct nfc_target *target, 182 __u8 rf_protocol, 183 __u8 rf_tech_and_mode, 184 void *params) 185 { 186 struct rf_tech_specific_params_nfca_poll *nfca_poll; 187 struct rf_tech_specific_params_nfcb_poll *nfcb_poll; 188 struct rf_tech_specific_params_nfcf_poll *nfcf_poll; 189 struct rf_tech_specific_params_nfcv_poll *nfcv_poll; 190 __u32 protocol; 191 192 if (rf_protocol == NCI_RF_PROTOCOL_T1T) 193 protocol = NFC_PROTO_JEWEL_MASK; 194 else if (rf_protocol == NCI_RF_PROTOCOL_T2T) 195 protocol = NFC_PROTO_MIFARE_MASK; 196 else if (rf_protocol == NCI_RF_PROTOCOL_ISO_DEP) 197 if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) 198 protocol = NFC_PROTO_ISO14443_MASK; 199 else 200 protocol = NFC_PROTO_ISO14443_B_MASK; 201 else if (rf_protocol == NCI_RF_PROTOCOL_T3T) 202 protocol = NFC_PROTO_FELICA_MASK; 203 else if (rf_protocol == NCI_RF_PROTOCOL_NFC_DEP) 204 protocol = NFC_PROTO_NFC_DEP_MASK; 205 else if (rf_protocol == NCI_RF_PROTOCOL_T5T) 206 protocol = NFC_PROTO_ISO15693_MASK; 207 else 208 protocol = nci_get_prop_rf_protocol(ndev, rf_protocol); 209 210 if (!(protocol & ndev->poll_prots)) { 211 pr_err("the target found does not have the desired protocol\n"); 212 return -EPROTO; 213 } 214 215 if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) { 216 nfca_poll = (struct rf_tech_specific_params_nfca_poll *)params; 217 218 target->sens_res = nfca_poll->sens_res; 219 target->sel_res = nfca_poll->sel_res; 220 target->nfcid1_len = nfca_poll->nfcid1_len; 221 if (target->nfcid1_len > 0) { 222 memcpy(target->nfcid1, nfca_poll->nfcid1, 223 target->nfcid1_len); 224 } 225 } else if (rf_tech_and_mode == NCI_NFC_B_PASSIVE_POLL_MODE) { 226 nfcb_poll = (struct rf_tech_specific_params_nfcb_poll *)params; 227 228 target->sensb_res_len = nfcb_poll->sensb_res_len; 229 if (target->sensb_res_len > 0) { 230 memcpy(target->sensb_res, nfcb_poll->sensb_res, 231 target->sensb_res_len); 232 } 233 } else if (rf_tech_and_mode == NCI_NFC_F_PASSIVE_POLL_MODE) { 234 nfcf_poll = (struct rf_tech_specific_params_nfcf_poll *)params; 235 236 target->sensf_res_len = nfcf_poll->sensf_res_len; 237 if (target->sensf_res_len > 0) { 238 memcpy(target->sensf_res, nfcf_poll->sensf_res, 239 target->sensf_res_len); 240 } 241 } else if (rf_tech_and_mode == NCI_NFC_V_PASSIVE_POLL_MODE) { 242 nfcv_poll = (struct rf_tech_specific_params_nfcv_poll *)params; 243 244 target->is_iso15693 = 1; 245 target->iso15693_dsfid = nfcv_poll->dsfid; 246 memcpy(target->iso15693_uid, nfcv_poll->uid, NFC_ISO15693_UID_MAXSIZE); 247 } else { 248 pr_err("unsupported rf_tech_and_mode 0x%x\n", rf_tech_and_mode); 249 return -EPROTO; 250 } 251 252 target->supported_protocols |= protocol; 253 254 pr_debug("protocol 0x%x\n", protocol); 255 256 return 0; 257 } 258 259 static void nci_add_new_target(struct nci_dev *ndev, 260 struct nci_rf_discover_ntf *ntf) 261 { 262 struct nfc_target *target; 263 int i, rc; 264 265 for (i = 0; i < ndev->n_targets; i++) { 266 target = &ndev->targets[i]; 267 if (target->logical_idx == ntf->rf_discovery_id) { 268 /* This target already exists, add the new protocol */ 269 nci_add_new_protocol(ndev, target, ntf->rf_protocol, 270 ntf->rf_tech_and_mode, 271 &ntf->rf_tech_specific_params); 272 return; 273 } 274 } 275 276 /* This is a new target, check if we've enough room */ 277 if (ndev->n_targets == NCI_MAX_DISCOVERED_TARGETS) { 278 pr_debug("not enough room, ignoring new target...\n"); 279 return; 280 } 281 282 target = &ndev->targets[ndev->n_targets]; 283 284 rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol, 285 ntf->rf_tech_and_mode, 286 &ntf->rf_tech_specific_params); 287 if (!rc) { 288 target->logical_idx = ntf->rf_discovery_id; 289 ndev->n_targets++; 290 291 pr_debug("logical idx %d, n_targets %d\n", target->logical_idx, 292 ndev->n_targets); 293 } 294 } 295 296 void nci_clear_target_list(struct nci_dev *ndev) 297 { 298 memset(ndev->targets, 0, 299 (sizeof(struct nfc_target)*NCI_MAX_DISCOVERED_TARGETS)); 300 301 ndev->n_targets = 0; 302 } 303 304 static void nci_rf_discover_ntf_packet(struct nci_dev *ndev, 305 struct sk_buff *skb) 306 { 307 struct nci_rf_discover_ntf ntf; 308 __u8 *data = skb->data; 309 bool add_target = true; 310 311 ntf.rf_discovery_id = *data++; 312 ntf.rf_protocol = *data++; 313 ntf.rf_tech_and_mode = *data++; 314 ntf.rf_tech_specific_params_len = *data++; 315 316 pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id); 317 pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol); 318 pr_debug("rf_tech_and_mode 0x%x\n", ntf.rf_tech_and_mode); 319 pr_debug("rf_tech_specific_params_len %d\n", 320 ntf.rf_tech_specific_params_len); 321 322 if (ntf.rf_tech_specific_params_len > 0) { 323 switch (ntf.rf_tech_and_mode) { 324 case NCI_NFC_A_PASSIVE_POLL_MODE: 325 data = nci_extract_rf_params_nfca_passive_poll(ndev, 326 &(ntf.rf_tech_specific_params.nfca_poll), data); 327 break; 328 329 case NCI_NFC_B_PASSIVE_POLL_MODE: 330 data = nci_extract_rf_params_nfcb_passive_poll(ndev, 331 &(ntf.rf_tech_specific_params.nfcb_poll), data); 332 break; 333 334 case NCI_NFC_F_PASSIVE_POLL_MODE: 335 data = nci_extract_rf_params_nfcf_passive_poll(ndev, 336 &(ntf.rf_tech_specific_params.nfcf_poll), data); 337 break; 338 339 case NCI_NFC_V_PASSIVE_POLL_MODE: 340 data = nci_extract_rf_params_nfcv_passive_poll(ndev, 341 &(ntf.rf_tech_specific_params.nfcv_poll), data); 342 break; 343 344 default: 345 pr_err("unsupported rf_tech_and_mode 0x%x\n", 346 ntf.rf_tech_and_mode); 347 data += ntf.rf_tech_specific_params_len; 348 add_target = false; 349 } 350 } 351 352 ntf.ntf_type = *data++; 353 pr_debug("ntf_type %d\n", ntf.ntf_type); 354 355 if (add_target == true) 356 nci_add_new_target(ndev, &ntf); 357 358 if (ntf.ntf_type == NCI_DISCOVER_NTF_TYPE_MORE) { 359 atomic_set(&ndev->state, NCI_W4_ALL_DISCOVERIES); 360 } else { 361 atomic_set(&ndev->state, NCI_W4_HOST_SELECT); 362 nfc_targets_found(ndev->nfc_dev, ndev->targets, 363 ndev->n_targets); 364 } 365 } 366 367 static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev, 368 struct nci_rf_intf_activated_ntf *ntf, __u8 *data) 369 { 370 struct activation_params_nfca_poll_iso_dep *nfca_poll; 371 struct activation_params_nfcb_poll_iso_dep *nfcb_poll; 372 373 switch (ntf->activation_rf_tech_and_mode) { 374 case NCI_NFC_A_PASSIVE_POLL_MODE: 375 nfca_poll = &ntf->activation_params.nfca_poll_iso_dep; 376 nfca_poll->rats_res_len = min_t(__u8, *data++, 20); 377 pr_debug("rats_res_len %d\n", nfca_poll->rats_res_len); 378 if (nfca_poll->rats_res_len > 0) { 379 memcpy(nfca_poll->rats_res, 380 data, nfca_poll->rats_res_len); 381 } 382 break; 383 384 case NCI_NFC_B_PASSIVE_POLL_MODE: 385 nfcb_poll = &ntf->activation_params.nfcb_poll_iso_dep; 386 nfcb_poll->attrib_res_len = min_t(__u8, *data++, 50); 387 pr_debug("attrib_res_len %d\n", nfcb_poll->attrib_res_len); 388 if (nfcb_poll->attrib_res_len > 0) { 389 memcpy(nfcb_poll->attrib_res, 390 data, nfcb_poll->attrib_res_len); 391 } 392 break; 393 394 default: 395 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", 396 ntf->activation_rf_tech_and_mode); 397 return NCI_STATUS_RF_PROTOCOL_ERROR; 398 } 399 400 return NCI_STATUS_OK; 401 } 402 403 static int nci_extract_activation_params_nfc_dep(struct nci_dev *ndev, 404 struct nci_rf_intf_activated_ntf *ntf, __u8 *data) 405 { 406 struct activation_params_poll_nfc_dep *poll; 407 struct activation_params_listen_nfc_dep *listen; 408 409 switch (ntf->activation_rf_tech_and_mode) { 410 case NCI_NFC_A_PASSIVE_POLL_MODE: 411 case NCI_NFC_F_PASSIVE_POLL_MODE: 412 poll = &ntf->activation_params.poll_nfc_dep; 413 poll->atr_res_len = min_t(__u8, *data++, 414 NFC_ATR_RES_MAXSIZE - 2); 415 pr_debug("atr_res_len %d\n", poll->atr_res_len); 416 if (poll->atr_res_len > 0) 417 memcpy(poll->atr_res, data, poll->atr_res_len); 418 break; 419 420 case NCI_NFC_A_PASSIVE_LISTEN_MODE: 421 case NCI_NFC_F_PASSIVE_LISTEN_MODE: 422 listen = &ntf->activation_params.listen_nfc_dep; 423 listen->atr_req_len = min_t(__u8, *data++, 424 NFC_ATR_REQ_MAXSIZE - 2); 425 pr_debug("atr_req_len %d\n", listen->atr_req_len); 426 if (listen->atr_req_len > 0) 427 memcpy(listen->atr_req, data, listen->atr_req_len); 428 break; 429 430 default: 431 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", 432 ntf->activation_rf_tech_and_mode); 433 return NCI_STATUS_RF_PROTOCOL_ERROR; 434 } 435 436 return NCI_STATUS_OK; 437 } 438 439 static void nci_target_auto_activated(struct nci_dev *ndev, 440 struct nci_rf_intf_activated_ntf *ntf) 441 { 442 struct nfc_target *target; 443 int rc; 444 445 target = &ndev->targets[ndev->n_targets]; 446 447 rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol, 448 ntf->activation_rf_tech_and_mode, 449 &ntf->rf_tech_specific_params); 450 if (rc) 451 return; 452 453 target->logical_idx = ntf->rf_discovery_id; 454 ndev->n_targets++; 455 456 pr_debug("logical idx %d, n_targets %d\n", 457 target->logical_idx, ndev->n_targets); 458 459 nfc_targets_found(ndev->nfc_dev, ndev->targets, ndev->n_targets); 460 } 461 462 static int nci_store_general_bytes_nfc_dep(struct nci_dev *ndev, 463 struct nci_rf_intf_activated_ntf *ntf) 464 { 465 ndev->remote_gb_len = 0; 466 467 if (ntf->activation_params_len <= 0) 468 return NCI_STATUS_OK; 469 470 switch (ntf->activation_rf_tech_and_mode) { 471 case NCI_NFC_A_PASSIVE_POLL_MODE: 472 case NCI_NFC_F_PASSIVE_POLL_MODE: 473 ndev->remote_gb_len = min_t(__u8, 474 (ntf->activation_params.poll_nfc_dep.atr_res_len 475 - NFC_ATR_RES_GT_OFFSET), 476 NFC_ATR_RES_GB_MAXSIZE); 477 memcpy(ndev->remote_gb, 478 (ntf->activation_params.poll_nfc_dep.atr_res 479 + NFC_ATR_RES_GT_OFFSET), 480 ndev->remote_gb_len); 481 break; 482 483 case NCI_NFC_A_PASSIVE_LISTEN_MODE: 484 case NCI_NFC_F_PASSIVE_LISTEN_MODE: 485 ndev->remote_gb_len = min_t(__u8, 486 (ntf->activation_params.listen_nfc_dep.atr_req_len 487 - NFC_ATR_REQ_GT_OFFSET), 488 NFC_ATR_REQ_GB_MAXSIZE); 489 memcpy(ndev->remote_gb, 490 (ntf->activation_params.listen_nfc_dep.atr_req 491 + NFC_ATR_REQ_GT_OFFSET), 492 ndev->remote_gb_len); 493 break; 494 495 default: 496 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", 497 ntf->activation_rf_tech_and_mode); 498 return NCI_STATUS_RF_PROTOCOL_ERROR; 499 } 500 501 return NCI_STATUS_OK; 502 } 503 504 static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev, 505 struct sk_buff *skb) 506 { 507 struct nci_conn_info *conn_info; 508 struct nci_rf_intf_activated_ntf ntf; 509 __u8 *data = skb->data; 510 int err = NCI_STATUS_OK; 511 512 ntf.rf_discovery_id = *data++; 513 ntf.rf_interface = *data++; 514 ntf.rf_protocol = *data++; 515 ntf.activation_rf_tech_and_mode = *data++; 516 ntf.max_data_pkt_payload_size = *data++; 517 ntf.initial_num_credits = *data++; 518 ntf.rf_tech_specific_params_len = *data++; 519 520 pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id); 521 pr_debug("rf_interface 0x%x\n", ntf.rf_interface); 522 pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol); 523 pr_debug("activation_rf_tech_and_mode 0x%x\n", 524 ntf.activation_rf_tech_and_mode); 525 pr_debug("max_data_pkt_payload_size 0x%x\n", 526 ntf.max_data_pkt_payload_size); 527 pr_debug("initial_num_credits 0x%x\n", 528 ntf.initial_num_credits); 529 pr_debug("rf_tech_specific_params_len %d\n", 530 ntf.rf_tech_specific_params_len); 531 532 /* If this contains a value of 0x00 (NFCEE Direct RF 533 * Interface) then all following parameters SHALL contain a 534 * value of 0 and SHALL be ignored. 535 */ 536 if (ntf.rf_interface == NCI_RF_INTERFACE_NFCEE_DIRECT) 537 goto listen; 538 539 if (ntf.rf_tech_specific_params_len > 0) { 540 switch (ntf.activation_rf_tech_and_mode) { 541 case NCI_NFC_A_PASSIVE_POLL_MODE: 542 data = nci_extract_rf_params_nfca_passive_poll(ndev, 543 &(ntf.rf_tech_specific_params.nfca_poll), data); 544 break; 545 546 case NCI_NFC_B_PASSIVE_POLL_MODE: 547 data = nci_extract_rf_params_nfcb_passive_poll(ndev, 548 &(ntf.rf_tech_specific_params.nfcb_poll), data); 549 break; 550 551 case NCI_NFC_F_PASSIVE_POLL_MODE: 552 data = nci_extract_rf_params_nfcf_passive_poll(ndev, 553 &(ntf.rf_tech_specific_params.nfcf_poll), data); 554 break; 555 556 case NCI_NFC_V_PASSIVE_POLL_MODE: 557 data = nci_extract_rf_params_nfcv_passive_poll(ndev, 558 &(ntf.rf_tech_specific_params.nfcv_poll), data); 559 break; 560 561 case NCI_NFC_A_PASSIVE_LISTEN_MODE: 562 /* no RF technology specific parameters */ 563 break; 564 565 case NCI_NFC_F_PASSIVE_LISTEN_MODE: 566 data = nci_extract_rf_params_nfcf_passive_listen(ndev, 567 &(ntf.rf_tech_specific_params.nfcf_listen), 568 data); 569 break; 570 571 default: 572 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", 573 ntf.activation_rf_tech_and_mode); 574 err = NCI_STATUS_RF_PROTOCOL_ERROR; 575 goto exit; 576 } 577 } 578 579 ntf.data_exch_rf_tech_and_mode = *data++; 580 ntf.data_exch_tx_bit_rate = *data++; 581 ntf.data_exch_rx_bit_rate = *data++; 582 ntf.activation_params_len = *data++; 583 584 pr_debug("data_exch_rf_tech_and_mode 0x%x\n", 585 ntf.data_exch_rf_tech_and_mode); 586 pr_debug("data_exch_tx_bit_rate 0x%x\n", ntf.data_exch_tx_bit_rate); 587 pr_debug("data_exch_rx_bit_rate 0x%x\n", ntf.data_exch_rx_bit_rate); 588 pr_debug("activation_params_len %d\n", ntf.activation_params_len); 589 590 if (ntf.activation_params_len > 0) { 591 switch (ntf.rf_interface) { 592 case NCI_RF_INTERFACE_ISO_DEP: 593 err = nci_extract_activation_params_iso_dep(ndev, 594 &ntf, data); 595 break; 596 597 case NCI_RF_INTERFACE_NFC_DEP: 598 err = nci_extract_activation_params_nfc_dep(ndev, 599 &ntf, data); 600 break; 601 602 case NCI_RF_INTERFACE_FRAME: 603 /* no activation params */ 604 break; 605 606 default: 607 pr_err("unsupported rf_interface 0x%x\n", 608 ntf.rf_interface); 609 err = NCI_STATUS_RF_PROTOCOL_ERROR; 610 break; 611 } 612 } 613 614 exit: 615 if (err == NCI_STATUS_OK) { 616 conn_info = ndev->rf_conn_info; 617 if (!conn_info) 618 return; 619 620 conn_info->max_pkt_payload_len = ntf.max_data_pkt_payload_size; 621 conn_info->initial_num_credits = ntf.initial_num_credits; 622 623 /* set the available credits to initial value */ 624 atomic_set(&conn_info->credits_cnt, 625 conn_info->initial_num_credits); 626 627 /* store general bytes to be reported later in dep_link_up */ 628 if (ntf.rf_interface == NCI_RF_INTERFACE_NFC_DEP) { 629 err = nci_store_general_bytes_nfc_dep(ndev, &ntf); 630 if (err != NCI_STATUS_OK) 631 pr_err("unable to store general bytes\n"); 632 } 633 } 634 635 if (!(ntf.activation_rf_tech_and_mode & NCI_RF_TECH_MODE_LISTEN_MASK)) { 636 /* Poll mode */ 637 if (atomic_read(&ndev->state) == NCI_DISCOVERY) { 638 /* A single target was found and activated 639 * automatically */ 640 atomic_set(&ndev->state, NCI_POLL_ACTIVE); 641 if (err == NCI_STATUS_OK) 642 nci_target_auto_activated(ndev, &ntf); 643 } else { /* ndev->state == NCI_W4_HOST_SELECT */ 644 /* A selected target was activated, so complete the 645 * request */ 646 atomic_set(&ndev->state, NCI_POLL_ACTIVE); 647 nci_req_complete(ndev, err); 648 } 649 } else { 650 listen: 651 /* Listen mode */ 652 atomic_set(&ndev->state, NCI_LISTEN_ACTIVE); 653 if (err == NCI_STATUS_OK && 654 ntf.rf_protocol == NCI_RF_PROTOCOL_NFC_DEP) { 655 err = nfc_tm_activated(ndev->nfc_dev, 656 NFC_PROTO_NFC_DEP_MASK, 657 NFC_COMM_PASSIVE, 658 ndev->remote_gb, 659 ndev->remote_gb_len); 660 if (err != NCI_STATUS_OK) 661 pr_err("error when signaling tm activation\n"); 662 } 663 } 664 } 665 666 static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev, 667 struct sk_buff *skb) 668 { 669 struct nci_conn_info *conn_info; 670 struct nci_rf_deactivate_ntf *ntf = (void *) skb->data; 671 672 pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason); 673 674 conn_info = ndev->rf_conn_info; 675 if (!conn_info) 676 return; 677 678 /* drop tx data queue */ 679 skb_queue_purge(&ndev->tx_q); 680 681 /* drop partial rx data packet */ 682 if (ndev->rx_data_reassembly) { 683 kfree_skb(ndev->rx_data_reassembly); 684 ndev->rx_data_reassembly = NULL; 685 } 686 687 /* complete the data exchange transaction, if exists */ 688 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) 689 nci_data_exchange_complete(ndev, NULL, NCI_STATIC_RF_CONN_ID, 690 -EIO); 691 692 switch (ntf->type) { 693 case NCI_DEACTIVATE_TYPE_IDLE_MODE: 694 nci_clear_target_list(ndev); 695 atomic_set(&ndev->state, NCI_IDLE); 696 break; 697 case NCI_DEACTIVATE_TYPE_SLEEP_MODE: 698 case NCI_DEACTIVATE_TYPE_SLEEP_AF_MODE: 699 atomic_set(&ndev->state, NCI_W4_HOST_SELECT); 700 break; 701 case NCI_DEACTIVATE_TYPE_DISCOVERY: 702 nci_clear_target_list(ndev); 703 atomic_set(&ndev->state, NCI_DISCOVERY); 704 break; 705 } 706 707 nci_req_complete(ndev, NCI_STATUS_OK); 708 } 709 710 static void nci_nfcee_discover_ntf_packet(struct nci_dev *ndev, 711 struct sk_buff *skb) 712 { 713 u8 status = NCI_STATUS_OK; 714 struct nci_nfcee_discover_ntf *nfcee_ntf = 715 (struct nci_nfcee_discover_ntf *)skb->data; 716 717 pr_debug("\n"); 718 719 /* NFCForum NCI 9.2.1 HCI Network Specific Handling 720 * If the NFCC supports the HCI Network, it SHALL return one, 721 * and only one, NFCEE_DISCOVER_NTF with a Protocol type of 722 * “HCI Access”, even if the HCI Network contains multiple NFCEEs. 723 */ 724 ndev->hci_dev->nfcee_id = nfcee_ntf->nfcee_id; 725 ndev->cur_params.id = nfcee_ntf->nfcee_id; 726 727 nci_req_complete(ndev, status); 728 } 729 730 static void nci_nfcee_action_ntf_packet(struct nci_dev *ndev, 731 struct sk_buff *skb) 732 { 733 pr_debug("\n"); 734 } 735 736 void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb) 737 { 738 __u16 ntf_opcode = nci_opcode(skb->data); 739 740 pr_debug("NCI RX: MT=ntf, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", 741 nci_pbf(skb->data), 742 nci_opcode_gid(ntf_opcode), 743 nci_opcode_oid(ntf_opcode), 744 nci_plen(skb->data)); 745 746 /* strip the nci control header */ 747 skb_pull(skb, NCI_CTRL_HDR_SIZE); 748 749 if (nci_opcode_gid(ntf_opcode) == NCI_GID_PROPRIETARY) { 750 if (nci_prop_ntf_packet(ndev, ntf_opcode, skb) == -ENOTSUPP) { 751 pr_err("unsupported ntf opcode 0x%x\n", 752 ntf_opcode); 753 } 754 755 goto end; 756 } 757 758 switch (ntf_opcode) { 759 case NCI_OP_CORE_CONN_CREDITS_NTF: 760 nci_core_conn_credits_ntf_packet(ndev, skb); 761 break; 762 763 case NCI_OP_CORE_GENERIC_ERROR_NTF: 764 nci_core_generic_error_ntf_packet(ndev, skb); 765 break; 766 767 case NCI_OP_CORE_INTF_ERROR_NTF: 768 nci_core_conn_intf_error_ntf_packet(ndev, skb); 769 break; 770 771 case NCI_OP_RF_DISCOVER_NTF: 772 nci_rf_discover_ntf_packet(ndev, skb); 773 break; 774 775 case NCI_OP_RF_INTF_ACTIVATED_NTF: 776 nci_rf_intf_activated_ntf_packet(ndev, skb); 777 break; 778 779 case NCI_OP_RF_DEACTIVATE_NTF: 780 nci_rf_deactivate_ntf_packet(ndev, skb); 781 break; 782 783 case NCI_OP_NFCEE_DISCOVER_NTF: 784 nci_nfcee_discover_ntf_packet(ndev, skb); 785 break; 786 787 case NCI_OP_RF_NFCEE_ACTION_NTF: 788 nci_nfcee_action_ntf_packet(ndev, skb); 789 break; 790 791 default: 792 pr_err("unknown ntf opcode 0x%x\n", ntf_opcode); 793 break; 794 } 795 796 nci_core_ntf_packet(ndev, ntf_opcode, skb); 797 end: 798 kfree_skb(skb); 799 } 800