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 30static 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 65static 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 79static 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 93static __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 120static __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 134static __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 150static __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 161static __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 173static __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 180static 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 > ARRAY_SIZE(target->nfcid1)) 222 return -EPROTO; 223 if (target->nfcid1_len > 0) { 224 memcpy(target->nfcid1, nfca_poll->nfcid1, 225 target->nfcid1_len); 226 } 227 } else if (rf_tech_and_mode == NCI_NFC_B_PASSIVE_POLL_MODE) { 228 nfcb_poll = (struct rf_tech_specific_params_nfcb_poll *)params; 229 230 target->sensb_res_len = nfcb_poll->sensb_res_len; 231 if (target->sensb_res_len > ARRAY_SIZE(target->sensb_res)) 232 return -EPROTO; 233 if (target->sensb_res_len > 0) { 234 memcpy(target->sensb_res, nfcb_poll->sensb_res, 235 target->sensb_res_len); 236 } 237 } else if (rf_tech_and_mode == NCI_NFC_F_PASSIVE_POLL_MODE) { 238 nfcf_poll = (struct rf_tech_specific_params_nfcf_poll *)params; 239 240 target->sensf_res_len = nfcf_poll->sensf_res_len; 241 if (target->sensf_res_len > ARRAY_SIZE(target->sensf_res)) 242 return -EPROTO; 243 if (target->sensf_res_len > 0) { 244 memcpy(target->sensf_res, nfcf_poll->sensf_res, 245 target->sensf_res_len); 246 } 247 } else if (rf_tech_and_mode == NCI_NFC_V_PASSIVE_POLL_MODE) { 248 nfcv_poll = (struct rf_tech_specific_params_nfcv_poll *)params; 249 250 target->is_iso15693 = 1; 251 target->iso15693_dsfid = nfcv_poll->dsfid; 252 memcpy(target->iso15693_uid, nfcv_poll->uid, NFC_ISO15693_UID_MAXSIZE); 253 } else { 254 pr_err("unsupported rf_tech_and_mode 0x%x\n", rf_tech_and_mode); 255 return -EPROTO; 256 } 257 258 target->supported_protocols |= protocol; 259 260 pr_debug("protocol 0x%x\n", protocol); 261 262 return 0; 263} 264 265static void nci_add_new_target(struct nci_dev *ndev, 266 struct nci_rf_discover_ntf *ntf) 267{ 268 struct nfc_target *target; 269 int i, rc; 270 271 for (i = 0; i < ndev->n_targets; i++) { 272 target = &ndev->targets[i]; 273 if (target->logical_idx == ntf->rf_discovery_id) { 274 /* This target already exists, add the new protocol */ 275 nci_add_new_protocol(ndev, target, ntf->rf_protocol, 276 ntf->rf_tech_and_mode, 277 &ntf->rf_tech_specific_params); 278 return; 279 } 280 } 281 282 /* This is a new target, check if we've enough room */ 283 if (ndev->n_targets == NCI_MAX_DISCOVERED_TARGETS) { 284 pr_debug("not enough room, ignoring new target...\n"); 285 return; 286 } 287 288 target = &ndev->targets[ndev->n_targets]; 289 290 rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol, 291 ntf->rf_tech_and_mode, 292 &ntf->rf_tech_specific_params); 293 if (!rc) { 294 target->logical_idx = ntf->rf_discovery_id; 295 ndev->n_targets++; 296 297 pr_debug("logical idx %d, n_targets %d\n", target->logical_idx, 298 ndev->n_targets); 299 } 300} 301 302void nci_clear_target_list(struct nci_dev *ndev) 303{ 304 memset(ndev->targets, 0, 305 (sizeof(struct nfc_target)*NCI_MAX_DISCOVERED_TARGETS)); 306 307 ndev->n_targets = 0; 308} 309 310static void nci_rf_discover_ntf_packet(struct nci_dev *ndev, 311 struct sk_buff *skb) 312{ 313 struct nci_rf_discover_ntf ntf; 314 __u8 *data = skb->data; 315 bool add_target = true; 316 317 ntf.rf_discovery_id = *data++; 318 ntf.rf_protocol = *data++; 319 ntf.rf_tech_and_mode = *data++; 320 ntf.rf_tech_specific_params_len = *data++; 321 322 pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id); 323 pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol); 324 pr_debug("rf_tech_and_mode 0x%x\n", ntf.rf_tech_and_mode); 325 pr_debug("rf_tech_specific_params_len %d\n", 326 ntf.rf_tech_specific_params_len); 327 328 if (ntf.rf_tech_specific_params_len > 0) { 329 switch (ntf.rf_tech_and_mode) { 330 case NCI_NFC_A_PASSIVE_POLL_MODE: 331 data = nci_extract_rf_params_nfca_passive_poll(ndev, 332 &(ntf.rf_tech_specific_params.nfca_poll), data); 333 break; 334 335 case NCI_NFC_B_PASSIVE_POLL_MODE: 336 data = nci_extract_rf_params_nfcb_passive_poll(ndev, 337 &(ntf.rf_tech_specific_params.nfcb_poll), data); 338 break; 339 340 case NCI_NFC_F_PASSIVE_POLL_MODE: 341 data = nci_extract_rf_params_nfcf_passive_poll(ndev, 342 &(ntf.rf_tech_specific_params.nfcf_poll), data); 343 break; 344 345 case NCI_NFC_V_PASSIVE_POLL_MODE: 346 data = nci_extract_rf_params_nfcv_passive_poll(ndev, 347 &(ntf.rf_tech_specific_params.nfcv_poll), data); 348 break; 349 350 default: 351 pr_err("unsupported rf_tech_and_mode 0x%x\n", 352 ntf.rf_tech_and_mode); 353 data += ntf.rf_tech_specific_params_len; 354 add_target = false; 355 } 356 } 357 358 ntf.ntf_type = *data++; 359 pr_debug("ntf_type %d\n", ntf.ntf_type); 360 361 if (add_target == true) 362 nci_add_new_target(ndev, &ntf); 363 364 if (ntf.ntf_type == NCI_DISCOVER_NTF_TYPE_MORE) { 365 atomic_set(&ndev->state, NCI_W4_ALL_DISCOVERIES); 366 } else { 367 atomic_set(&ndev->state, NCI_W4_HOST_SELECT); 368 nfc_targets_found(ndev->nfc_dev, ndev->targets, 369 ndev->n_targets); 370 } 371} 372 373static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev, 374 struct nci_rf_intf_activated_ntf *ntf, __u8 *data) 375{ 376 struct activation_params_nfca_poll_iso_dep *nfca_poll; 377 struct activation_params_nfcb_poll_iso_dep *nfcb_poll; 378 379 switch (ntf->activation_rf_tech_and_mode) { 380 case NCI_NFC_A_PASSIVE_POLL_MODE: 381 nfca_poll = &ntf->activation_params.nfca_poll_iso_dep; 382 nfca_poll->rats_res_len = min_t(__u8, *data++, 20); 383 pr_debug("rats_res_len %d\n", nfca_poll->rats_res_len); 384 if (nfca_poll->rats_res_len > 0) { 385 memcpy(nfca_poll->rats_res, 386 data, nfca_poll->rats_res_len); 387 } 388 break; 389 390 case NCI_NFC_B_PASSIVE_POLL_MODE: 391 nfcb_poll = &ntf->activation_params.nfcb_poll_iso_dep; 392 nfcb_poll->attrib_res_len = min_t(__u8, *data++, 50); 393 pr_debug("attrib_res_len %d\n", nfcb_poll->attrib_res_len); 394 if (nfcb_poll->attrib_res_len > 0) { 395 memcpy(nfcb_poll->attrib_res, 396 data, nfcb_poll->attrib_res_len); 397 } 398 break; 399 400 default: 401 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", 402 ntf->activation_rf_tech_and_mode); 403 return NCI_STATUS_RF_PROTOCOL_ERROR; 404 } 405 406 return NCI_STATUS_OK; 407} 408 409static int nci_extract_activation_params_nfc_dep(struct nci_dev *ndev, 410 struct nci_rf_intf_activated_ntf *ntf, __u8 *data) 411{ 412 struct activation_params_poll_nfc_dep *poll; 413 struct activation_params_listen_nfc_dep *listen; 414 415 switch (ntf->activation_rf_tech_and_mode) { 416 case NCI_NFC_A_PASSIVE_POLL_MODE: 417 case NCI_NFC_F_PASSIVE_POLL_MODE: 418 poll = &ntf->activation_params.poll_nfc_dep; 419 poll->atr_res_len = min_t(__u8, *data++, 420 NFC_ATR_RES_MAXSIZE - 2); 421 pr_debug("atr_res_len %d\n", poll->atr_res_len); 422 if (poll->atr_res_len > 0) 423 memcpy(poll->atr_res, data, poll->atr_res_len); 424 break; 425 426 case NCI_NFC_A_PASSIVE_LISTEN_MODE: 427 case NCI_NFC_F_PASSIVE_LISTEN_MODE: 428 listen = &ntf->activation_params.listen_nfc_dep; 429 listen->atr_req_len = min_t(__u8, *data++, 430 NFC_ATR_REQ_MAXSIZE - 2); 431 pr_debug("atr_req_len %d\n", listen->atr_req_len); 432 if (listen->atr_req_len > 0) 433 memcpy(listen->atr_req, data, listen->atr_req_len); 434 break; 435 436 default: 437 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", 438 ntf->activation_rf_tech_and_mode); 439 return NCI_STATUS_RF_PROTOCOL_ERROR; 440 } 441 442 return NCI_STATUS_OK; 443} 444 445static void nci_target_auto_activated(struct nci_dev *ndev, 446 struct nci_rf_intf_activated_ntf *ntf) 447{ 448 struct nfc_target *target; 449 int rc; 450 451 target = &ndev->targets[ndev->n_targets]; 452 453 rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol, 454 ntf->activation_rf_tech_and_mode, 455 &ntf->rf_tech_specific_params); 456 if (rc) 457 return; 458 459 target->logical_idx = ntf->rf_discovery_id; 460 ndev->n_targets++; 461 462 pr_debug("logical idx %d, n_targets %d\n", 463 target->logical_idx, ndev->n_targets); 464 465 nfc_targets_found(ndev->nfc_dev, ndev->targets, ndev->n_targets); 466} 467 468static int nci_store_general_bytes_nfc_dep(struct nci_dev *ndev, 469 struct nci_rf_intf_activated_ntf *ntf) 470{ 471 ndev->remote_gb_len = 0; 472 473 if (ntf->activation_params_len <= 0) 474 return NCI_STATUS_OK; 475 476 switch (ntf->activation_rf_tech_and_mode) { 477 case NCI_NFC_A_PASSIVE_POLL_MODE: 478 case NCI_NFC_F_PASSIVE_POLL_MODE: 479 ndev->remote_gb_len = min_t(__u8, 480 (ntf->activation_params.poll_nfc_dep.atr_res_len 481 - NFC_ATR_RES_GT_OFFSET), 482 NFC_ATR_RES_GB_MAXSIZE); 483 memcpy(ndev->remote_gb, 484 (ntf->activation_params.poll_nfc_dep.atr_res 485 + NFC_ATR_RES_GT_OFFSET), 486 ndev->remote_gb_len); 487 break; 488 489 case NCI_NFC_A_PASSIVE_LISTEN_MODE: 490 case NCI_NFC_F_PASSIVE_LISTEN_MODE: 491 ndev->remote_gb_len = min_t(__u8, 492 (ntf->activation_params.listen_nfc_dep.atr_req_len 493 - NFC_ATR_REQ_GT_OFFSET), 494 NFC_ATR_REQ_GB_MAXSIZE); 495 memcpy(ndev->remote_gb, 496 (ntf->activation_params.listen_nfc_dep.atr_req 497 + NFC_ATR_REQ_GT_OFFSET), 498 ndev->remote_gb_len); 499 break; 500 501 default: 502 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", 503 ntf->activation_rf_tech_and_mode); 504 return NCI_STATUS_RF_PROTOCOL_ERROR; 505 } 506 507 return NCI_STATUS_OK; 508} 509 510static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev, 511 struct sk_buff *skb) 512{ 513 struct nci_conn_info *conn_info; 514 struct nci_rf_intf_activated_ntf ntf; 515 __u8 *data = skb->data; 516 int err = NCI_STATUS_OK; 517 518 ntf.rf_discovery_id = *data++; 519 ntf.rf_interface = *data++; 520 ntf.rf_protocol = *data++; 521 ntf.activation_rf_tech_and_mode = *data++; 522 ntf.max_data_pkt_payload_size = *data++; 523 ntf.initial_num_credits = *data++; 524 ntf.rf_tech_specific_params_len = *data++; 525 526 pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id); 527 pr_debug("rf_interface 0x%x\n", ntf.rf_interface); 528 pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol); 529 pr_debug("activation_rf_tech_and_mode 0x%x\n", 530 ntf.activation_rf_tech_and_mode); 531 pr_debug("max_data_pkt_payload_size 0x%x\n", 532 ntf.max_data_pkt_payload_size); 533 pr_debug("initial_num_credits 0x%x\n", 534 ntf.initial_num_credits); 535 pr_debug("rf_tech_specific_params_len %d\n", 536 ntf.rf_tech_specific_params_len); 537 538 /* If this contains a value of 0x00 (NFCEE Direct RF 539 * Interface) then all following parameters SHALL contain a 540 * value of 0 and SHALL be ignored. 541 */ 542 if (ntf.rf_interface == NCI_RF_INTERFACE_NFCEE_DIRECT) 543 goto listen; 544 545 if (ntf.rf_tech_specific_params_len > 0) { 546 switch (ntf.activation_rf_tech_and_mode) { 547 case NCI_NFC_A_PASSIVE_POLL_MODE: 548 data = nci_extract_rf_params_nfca_passive_poll(ndev, 549 &(ntf.rf_tech_specific_params.nfca_poll), data); 550 break; 551 552 case NCI_NFC_B_PASSIVE_POLL_MODE: 553 data = nci_extract_rf_params_nfcb_passive_poll(ndev, 554 &(ntf.rf_tech_specific_params.nfcb_poll), data); 555 break; 556 557 case NCI_NFC_F_PASSIVE_POLL_MODE: 558 data = nci_extract_rf_params_nfcf_passive_poll(ndev, 559 &(ntf.rf_tech_specific_params.nfcf_poll), data); 560 break; 561 562 case NCI_NFC_V_PASSIVE_POLL_MODE: 563 data = nci_extract_rf_params_nfcv_passive_poll(ndev, 564 &(ntf.rf_tech_specific_params.nfcv_poll), data); 565 break; 566 567 case NCI_NFC_A_PASSIVE_LISTEN_MODE: 568 /* no RF technology specific parameters */ 569 break; 570 571 case NCI_NFC_F_PASSIVE_LISTEN_MODE: 572 data = nci_extract_rf_params_nfcf_passive_listen(ndev, 573 &(ntf.rf_tech_specific_params.nfcf_listen), 574 data); 575 break; 576 577 default: 578 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", 579 ntf.activation_rf_tech_and_mode); 580 err = NCI_STATUS_RF_PROTOCOL_ERROR; 581 goto exit; 582 } 583 } 584 585 ntf.data_exch_rf_tech_and_mode = *data++; 586 ntf.data_exch_tx_bit_rate = *data++; 587 ntf.data_exch_rx_bit_rate = *data++; 588 ntf.activation_params_len = *data++; 589 590 pr_debug("data_exch_rf_tech_and_mode 0x%x\n", 591 ntf.data_exch_rf_tech_and_mode); 592 pr_debug("data_exch_tx_bit_rate 0x%x\n", ntf.data_exch_tx_bit_rate); 593 pr_debug("data_exch_rx_bit_rate 0x%x\n", ntf.data_exch_rx_bit_rate); 594 pr_debug("activation_params_len %d\n", ntf.activation_params_len); 595 596 if (ntf.activation_params_len > 0) { 597 switch (ntf.rf_interface) { 598 case NCI_RF_INTERFACE_ISO_DEP: 599 err = nci_extract_activation_params_iso_dep(ndev, 600 &ntf, data); 601 break; 602 603 case NCI_RF_INTERFACE_NFC_DEP: 604 err = nci_extract_activation_params_nfc_dep(ndev, 605 &ntf, data); 606 break; 607 608 case NCI_RF_INTERFACE_FRAME: 609 /* no activation params */ 610 break; 611 612 default: 613 pr_err("unsupported rf_interface 0x%x\n", 614 ntf.rf_interface); 615 err = NCI_STATUS_RF_PROTOCOL_ERROR; 616 break; 617 } 618 } 619 620exit: 621 if (err == NCI_STATUS_OK) { 622 conn_info = ndev->rf_conn_info; 623 if (!conn_info) 624 return; 625 626 conn_info->max_pkt_payload_len = ntf.max_data_pkt_payload_size; 627 conn_info->initial_num_credits = ntf.initial_num_credits; 628 629 /* set the available credits to initial value */ 630 atomic_set(&conn_info->credits_cnt, 631 conn_info->initial_num_credits); 632 633 /* store general bytes to be reported later in dep_link_up */ 634 if (ntf.rf_interface == NCI_RF_INTERFACE_NFC_DEP) { 635 err = nci_store_general_bytes_nfc_dep(ndev, &ntf); 636 if (err != NCI_STATUS_OK) 637 pr_err("unable to store general bytes\n"); 638 } 639 } 640 641 if (!(ntf.activation_rf_tech_and_mode & NCI_RF_TECH_MODE_LISTEN_MASK)) { 642 /* Poll mode */ 643 if (atomic_read(&ndev->state) == NCI_DISCOVERY) { 644 /* A single target was found and activated 645 * automatically */ 646 atomic_set(&ndev->state, NCI_POLL_ACTIVE); 647 if (err == NCI_STATUS_OK) 648 nci_target_auto_activated(ndev, &ntf); 649 } else { /* ndev->state == NCI_W4_HOST_SELECT */ 650 /* A selected target was activated, so complete the 651 * request */ 652 atomic_set(&ndev->state, NCI_POLL_ACTIVE); 653 nci_req_complete(ndev, err); 654 } 655 } else { 656listen: 657 /* Listen mode */ 658 atomic_set(&ndev->state, NCI_LISTEN_ACTIVE); 659 if (err == NCI_STATUS_OK && 660 ntf.rf_protocol == NCI_RF_PROTOCOL_NFC_DEP) { 661 err = nfc_tm_activated(ndev->nfc_dev, 662 NFC_PROTO_NFC_DEP_MASK, 663 NFC_COMM_PASSIVE, 664 ndev->remote_gb, 665 ndev->remote_gb_len); 666 if (err != NCI_STATUS_OK) 667 pr_err("error when signaling tm activation\n"); 668 } 669 } 670} 671 672static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev, 673 struct sk_buff *skb) 674{ 675 struct nci_conn_info *conn_info; 676 struct nci_rf_deactivate_ntf *ntf = (void *) skb->data; 677 678 pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason); 679 680 conn_info = ndev->rf_conn_info; 681 if (!conn_info) 682 return; 683 684 /* drop tx data queue */ 685 skb_queue_purge(&ndev->tx_q); 686 687 /* drop partial rx data packet */ 688 if (ndev->rx_data_reassembly) { 689 kfree_skb(ndev->rx_data_reassembly); 690 ndev->rx_data_reassembly = NULL; 691 } 692 693 /* complete the data exchange transaction, if exists */ 694 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) 695 nci_data_exchange_complete(ndev, NULL, NCI_STATIC_RF_CONN_ID, 696 -EIO); 697 698 switch (ntf->type) { 699 case NCI_DEACTIVATE_TYPE_IDLE_MODE: 700 nci_clear_target_list(ndev); 701 atomic_set(&ndev->state, NCI_IDLE); 702 break; 703 case NCI_DEACTIVATE_TYPE_SLEEP_MODE: 704 case NCI_DEACTIVATE_TYPE_SLEEP_AF_MODE: 705 atomic_set(&ndev->state, NCI_W4_HOST_SELECT); 706 break; 707 case NCI_DEACTIVATE_TYPE_DISCOVERY: 708 nci_clear_target_list(ndev); 709 atomic_set(&ndev->state, NCI_DISCOVERY); 710 break; 711 } 712 713 nci_req_complete(ndev, NCI_STATUS_OK); 714} 715 716static void nci_nfcee_discover_ntf_packet(struct nci_dev *ndev, 717 struct sk_buff *skb) 718{ 719 u8 status = NCI_STATUS_OK; 720 struct nci_nfcee_discover_ntf *nfcee_ntf = 721 (struct nci_nfcee_discover_ntf *)skb->data; 722 723 pr_debug("\n"); 724 725 /* NFCForum NCI 9.2.1 HCI Network Specific Handling 726 * If the NFCC supports the HCI Network, it SHALL return one, 727 * and only one, NFCEE_DISCOVER_NTF with a Protocol type of 728 * “HCI Access”, even if the HCI Network contains multiple NFCEEs. 729 */ 730 ndev->hci_dev->nfcee_id = nfcee_ntf->nfcee_id; 731 ndev->cur_params.id = nfcee_ntf->nfcee_id; 732 733 nci_req_complete(ndev, status); 734} 735 736static void nci_nfcee_action_ntf_packet(struct nci_dev *ndev, 737 struct sk_buff *skb) 738{ 739 pr_debug("\n"); 740} 741 742void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb) 743{ 744 __u16 ntf_opcode = nci_opcode(skb->data); 745 746 pr_debug("NCI RX: MT=ntf, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", 747 nci_pbf(skb->data), 748 nci_opcode_gid(ntf_opcode), 749 nci_opcode_oid(ntf_opcode), 750 nci_plen(skb->data)); 751 752 /* strip the nci control header */ 753 skb_pull(skb, NCI_CTRL_HDR_SIZE); 754 755 if (nci_opcode_gid(ntf_opcode) == NCI_GID_PROPRIETARY) { 756 if (nci_prop_ntf_packet(ndev, ntf_opcode, skb) == -ENOTSUPP) { 757 pr_err("unsupported ntf opcode 0x%x\n", 758 ntf_opcode); 759 } 760 761 goto end; 762 } 763 764 switch (ntf_opcode) { 765 case NCI_OP_CORE_CONN_CREDITS_NTF: 766 nci_core_conn_credits_ntf_packet(ndev, skb); 767 break; 768 769 case NCI_OP_CORE_GENERIC_ERROR_NTF: 770 nci_core_generic_error_ntf_packet(ndev, skb); 771 break; 772 773 case NCI_OP_CORE_INTF_ERROR_NTF: 774 nci_core_conn_intf_error_ntf_packet(ndev, skb); 775 break; 776 777 case NCI_OP_RF_DISCOVER_NTF: 778 nci_rf_discover_ntf_packet(ndev, skb); 779 break; 780 781 case NCI_OP_RF_INTF_ACTIVATED_NTF: 782 nci_rf_intf_activated_ntf_packet(ndev, skb); 783 break; 784 785 case NCI_OP_RF_DEACTIVATE_NTF: 786 nci_rf_deactivate_ntf_packet(ndev, skb); 787 break; 788 789 case NCI_OP_NFCEE_DISCOVER_NTF: 790 nci_nfcee_discover_ntf_packet(ndev, skb); 791 break; 792 793 case NCI_OP_RF_NFCEE_ACTION_NTF: 794 nci_nfcee_action_ntf_packet(ndev, skb); 795 break; 796 797 default: 798 pr_err("unknown ntf opcode 0x%x\n", ntf_opcode); 799 break; 800 } 801 802 nci_core_ntf_packet(ndev, ntf_opcode, skb); 803end: 804 kfree_skb(skb); 805} 806