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