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 42static 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 74static 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 88static 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 102static __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 129static __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 143static __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 159static __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__u32 nci_get_prop_rf_protocol(struct nci_dev *ndev, __u8 rf_protocol) 171{ 172 if (ndev->ops->get_rfprotocol) 173 return ndev->ops->get_rfprotocol(ndev, rf_protocol); 174 return 0; 175} 176 177static int nci_add_new_protocol(struct nci_dev *ndev, 178 struct nfc_target *target, 179 __u8 rf_protocol, 180 __u8 rf_tech_and_mode, 181 void *params) 182{ 183 struct rf_tech_specific_params_nfca_poll *nfca_poll; 184 struct rf_tech_specific_params_nfcb_poll *nfcb_poll; 185 struct rf_tech_specific_params_nfcf_poll *nfcf_poll; 186 struct rf_tech_specific_params_nfcv_poll *nfcv_poll; 187 __u32 protocol; 188 189 if (rf_protocol == NCI_RF_PROTOCOL_T1T) 190 protocol = NFC_PROTO_JEWEL_MASK; 191 else if (rf_protocol == NCI_RF_PROTOCOL_T2T) 192 protocol = NFC_PROTO_MIFARE_MASK; 193 else if (rf_protocol == NCI_RF_PROTOCOL_ISO_DEP) 194 if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) 195 protocol = NFC_PROTO_ISO14443_MASK; 196 else 197 protocol = NFC_PROTO_ISO14443_B_MASK; 198 else if (rf_protocol == NCI_RF_PROTOCOL_T3T) 199 protocol = NFC_PROTO_FELICA_MASK; 200 else if (rf_protocol == NCI_RF_PROTOCOL_NFC_DEP) 201 protocol = NFC_PROTO_NFC_DEP_MASK; 202 else if (rf_protocol == NCI_RF_PROTOCOL_T5T) 203 protocol = NFC_PROTO_ISO15693_MASK; 204 else 205 protocol = nci_get_prop_rf_protocol(ndev, rf_protocol); 206 207 if (!(protocol & ndev->poll_prots)) { 208 pr_err("the target found does not have the desired protocol\n"); 209 return -EPROTO; 210 } 211 212 if (rf_tech_and_mode == NCI_NFC_A_PASSIVE_POLL_MODE) { 213 nfca_poll = (struct rf_tech_specific_params_nfca_poll *)params; 214 215 target->sens_res = nfca_poll->sens_res; 216 target->sel_res = nfca_poll->sel_res; 217 target->nfcid1_len = nfca_poll->nfcid1_len; 218 if (target->nfcid1_len > 0) { 219 memcpy(target->nfcid1, nfca_poll->nfcid1, 220 target->nfcid1_len); 221 } 222 } else if (rf_tech_and_mode == NCI_NFC_B_PASSIVE_POLL_MODE) { 223 nfcb_poll = (struct rf_tech_specific_params_nfcb_poll *)params; 224 225 target->sensb_res_len = nfcb_poll->sensb_res_len; 226 if (target->sensb_res_len > 0) { 227 memcpy(target->sensb_res, nfcb_poll->sensb_res, 228 target->sensb_res_len); 229 } 230 } else if (rf_tech_and_mode == NCI_NFC_F_PASSIVE_POLL_MODE) { 231 nfcf_poll = (struct rf_tech_specific_params_nfcf_poll *)params; 232 233 target->sensf_res_len = nfcf_poll->sensf_res_len; 234 if (target->sensf_res_len > 0) { 235 memcpy(target->sensf_res, nfcf_poll->sensf_res, 236 target->sensf_res_len); 237 } 238 } else if (rf_tech_and_mode == NCI_NFC_V_PASSIVE_POLL_MODE) { 239 nfcv_poll = (struct rf_tech_specific_params_nfcv_poll *)params; 240 241 target->is_iso15693 = 1; 242 target->iso15693_dsfid = nfcv_poll->dsfid; 243 memcpy(target->iso15693_uid, nfcv_poll->uid, NFC_ISO15693_UID_MAXSIZE); 244 } else { 245 pr_err("unsupported rf_tech_and_mode 0x%x\n", rf_tech_and_mode); 246 return -EPROTO; 247 } 248 249 target->supported_protocols |= protocol; 250 251 pr_debug("protocol 0x%x\n", protocol); 252 253 return 0; 254} 255 256static void nci_add_new_target(struct nci_dev *ndev, 257 struct nci_rf_discover_ntf *ntf) 258{ 259 struct nfc_target *target; 260 int i, rc; 261 262 for (i = 0; i < ndev->n_targets; i++) { 263 target = &ndev->targets[i]; 264 if (target->logical_idx == ntf->rf_discovery_id) { 265 /* This target already exists, add the new protocol */ 266 nci_add_new_protocol(ndev, target, ntf->rf_protocol, 267 ntf->rf_tech_and_mode, 268 &ntf->rf_tech_specific_params); 269 return; 270 } 271 } 272 273 /* This is a new target, check if we've enough room */ 274 if (ndev->n_targets == NCI_MAX_DISCOVERED_TARGETS) { 275 pr_debug("not enough room, ignoring new target...\n"); 276 return; 277 } 278 279 target = &ndev->targets[ndev->n_targets]; 280 281 rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol, 282 ntf->rf_tech_and_mode, 283 &ntf->rf_tech_specific_params); 284 if (!rc) { 285 target->logical_idx = ntf->rf_discovery_id; 286 ndev->n_targets++; 287 288 pr_debug("logical idx %d, n_targets %d\n", target->logical_idx, 289 ndev->n_targets); 290 } 291} 292 293void nci_clear_target_list(struct nci_dev *ndev) 294{ 295 memset(ndev->targets, 0, 296 (sizeof(struct nfc_target)*NCI_MAX_DISCOVERED_TARGETS)); 297 298 ndev->n_targets = 0; 299} 300 301static void nci_rf_discover_ntf_packet(struct nci_dev *ndev, 302 struct sk_buff *skb) 303{ 304 struct nci_rf_discover_ntf ntf; 305 __u8 *data = skb->data; 306 bool add_target = true; 307 308 ntf.rf_discovery_id = *data++; 309 ntf.rf_protocol = *data++; 310 ntf.rf_tech_and_mode = *data++; 311 ntf.rf_tech_specific_params_len = *data++; 312 313 pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id); 314 pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol); 315 pr_debug("rf_tech_and_mode 0x%x\n", ntf.rf_tech_and_mode); 316 pr_debug("rf_tech_specific_params_len %d\n", 317 ntf.rf_tech_specific_params_len); 318 319 if (ntf.rf_tech_specific_params_len > 0) { 320 switch (ntf.rf_tech_and_mode) { 321 case NCI_NFC_A_PASSIVE_POLL_MODE: 322 data = nci_extract_rf_params_nfca_passive_poll(ndev, 323 &(ntf.rf_tech_specific_params.nfca_poll), data); 324 break; 325 326 case NCI_NFC_B_PASSIVE_POLL_MODE: 327 data = nci_extract_rf_params_nfcb_passive_poll(ndev, 328 &(ntf.rf_tech_specific_params.nfcb_poll), data); 329 break; 330 331 case NCI_NFC_F_PASSIVE_POLL_MODE: 332 data = nci_extract_rf_params_nfcf_passive_poll(ndev, 333 &(ntf.rf_tech_specific_params.nfcf_poll), data); 334 break; 335 336 case NCI_NFC_V_PASSIVE_POLL_MODE: 337 data = nci_extract_rf_params_nfcv_passive_poll(ndev, 338 &(ntf.rf_tech_specific_params.nfcv_poll), data); 339 break; 340 341 default: 342 pr_err("unsupported rf_tech_and_mode 0x%x\n", 343 ntf.rf_tech_and_mode); 344 data += ntf.rf_tech_specific_params_len; 345 add_target = false; 346 } 347 } 348 349 ntf.ntf_type = *data++; 350 pr_debug("ntf_type %d\n", ntf.ntf_type); 351 352 if (add_target == true) 353 nci_add_new_target(ndev, &ntf); 354 355 if (ntf.ntf_type == NCI_DISCOVER_NTF_TYPE_MORE) { 356 atomic_set(&ndev->state, NCI_W4_ALL_DISCOVERIES); 357 } else { 358 atomic_set(&ndev->state, NCI_W4_HOST_SELECT); 359 nfc_targets_found(ndev->nfc_dev, ndev->targets, 360 ndev->n_targets); 361 } 362} 363 364static int nci_extract_activation_params_iso_dep(struct nci_dev *ndev, 365 struct nci_rf_intf_activated_ntf *ntf, __u8 *data) 366{ 367 struct activation_params_nfca_poll_iso_dep *nfca_poll; 368 struct activation_params_nfcb_poll_iso_dep *nfcb_poll; 369 370 switch (ntf->activation_rf_tech_and_mode) { 371 case NCI_NFC_A_PASSIVE_POLL_MODE: 372 nfca_poll = &ntf->activation_params.nfca_poll_iso_dep; 373 nfca_poll->rats_res_len = min_t(__u8, *data++, 20); 374 pr_debug("rats_res_len %d\n", nfca_poll->rats_res_len); 375 if (nfca_poll->rats_res_len > 0) { 376 memcpy(nfca_poll->rats_res, 377 data, nfca_poll->rats_res_len); 378 } 379 break; 380 381 case NCI_NFC_B_PASSIVE_POLL_MODE: 382 nfcb_poll = &ntf->activation_params.nfcb_poll_iso_dep; 383 nfcb_poll->attrib_res_len = min_t(__u8, *data++, 50); 384 pr_debug("attrib_res_len %d\n", nfcb_poll->attrib_res_len); 385 if (nfcb_poll->attrib_res_len > 0) { 386 memcpy(nfcb_poll->attrib_res, 387 data, nfcb_poll->attrib_res_len); 388 } 389 break; 390 391 default: 392 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", 393 ntf->activation_rf_tech_and_mode); 394 return NCI_STATUS_RF_PROTOCOL_ERROR; 395 } 396 397 return NCI_STATUS_OK; 398} 399 400static int nci_extract_activation_params_nfc_dep(struct nci_dev *ndev, 401 struct nci_rf_intf_activated_ntf *ntf, __u8 *data) 402{ 403 struct activation_params_poll_nfc_dep *poll; 404 405 switch (ntf->activation_rf_tech_and_mode) { 406 case NCI_NFC_A_PASSIVE_POLL_MODE: 407 case NCI_NFC_F_PASSIVE_POLL_MODE: 408 poll = &ntf->activation_params.poll_nfc_dep; 409 poll->atr_res_len = min_t(__u8, *data++, 63); 410 pr_debug("atr_res_len %d\n", poll->atr_res_len); 411 if (poll->atr_res_len > 0) 412 memcpy(poll->atr_res, data, poll->atr_res_len); 413 break; 414 415 default: 416 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", 417 ntf->activation_rf_tech_and_mode); 418 return NCI_STATUS_RF_PROTOCOL_ERROR; 419 } 420 421 return NCI_STATUS_OK; 422} 423 424static void nci_target_auto_activated(struct nci_dev *ndev, 425 struct nci_rf_intf_activated_ntf *ntf) 426{ 427 struct nfc_target *target; 428 int rc; 429 430 target = &ndev->targets[ndev->n_targets]; 431 432 rc = nci_add_new_protocol(ndev, target, ntf->rf_protocol, 433 ntf->activation_rf_tech_and_mode, 434 &ntf->rf_tech_specific_params); 435 if (rc) 436 return; 437 438 target->logical_idx = ntf->rf_discovery_id; 439 ndev->n_targets++; 440 441 pr_debug("logical idx %d, n_targets %d\n", 442 target->logical_idx, ndev->n_targets); 443 444 nfc_targets_found(ndev->nfc_dev, ndev->targets, ndev->n_targets); 445} 446 447static void nci_rf_intf_activated_ntf_packet(struct nci_dev *ndev, 448 struct sk_buff *skb) 449{ 450 struct nci_rf_intf_activated_ntf ntf; 451 __u8 *data = skb->data; 452 int err = NCI_STATUS_OK; 453 454 ntf.rf_discovery_id = *data++; 455 ntf.rf_interface = *data++; 456 ntf.rf_protocol = *data++; 457 ntf.activation_rf_tech_and_mode = *data++; 458 ntf.max_data_pkt_payload_size = *data++; 459 ntf.initial_num_credits = *data++; 460 ntf.rf_tech_specific_params_len = *data++; 461 462 pr_debug("rf_discovery_id %d\n", ntf.rf_discovery_id); 463 pr_debug("rf_interface 0x%x\n", ntf.rf_interface); 464 pr_debug("rf_protocol 0x%x\n", ntf.rf_protocol); 465 pr_debug("activation_rf_tech_and_mode 0x%x\n", 466 ntf.activation_rf_tech_and_mode); 467 pr_debug("max_data_pkt_payload_size 0x%x\n", 468 ntf.max_data_pkt_payload_size); 469 pr_debug("initial_num_credits 0x%x\n", 470 ntf.initial_num_credits); 471 pr_debug("rf_tech_specific_params_len %d\n", 472 ntf.rf_tech_specific_params_len); 473 474 if (ntf.rf_tech_specific_params_len > 0) { 475 switch (ntf.activation_rf_tech_and_mode) { 476 case NCI_NFC_A_PASSIVE_POLL_MODE: 477 data = nci_extract_rf_params_nfca_passive_poll(ndev, 478 &(ntf.rf_tech_specific_params.nfca_poll), data); 479 break; 480 481 case NCI_NFC_B_PASSIVE_POLL_MODE: 482 data = nci_extract_rf_params_nfcb_passive_poll(ndev, 483 &(ntf.rf_tech_specific_params.nfcb_poll), data); 484 break; 485 486 case NCI_NFC_F_PASSIVE_POLL_MODE: 487 data = nci_extract_rf_params_nfcf_passive_poll(ndev, 488 &(ntf.rf_tech_specific_params.nfcf_poll), data); 489 break; 490 491 case NCI_NFC_V_PASSIVE_POLL_MODE: 492 data = nci_extract_rf_params_nfcv_passive_poll(ndev, 493 &(ntf.rf_tech_specific_params.nfcv_poll), data); 494 break; 495 496 default: 497 pr_err("unsupported activation_rf_tech_and_mode 0x%x\n", 498 ntf.activation_rf_tech_and_mode); 499 err = NCI_STATUS_RF_PROTOCOL_ERROR; 500 goto exit; 501 } 502 } 503 504 ntf.data_exch_rf_tech_and_mode = *data++; 505 ntf.data_exch_tx_bit_rate = *data++; 506 ntf.data_exch_rx_bit_rate = *data++; 507 ntf.activation_params_len = *data++; 508 509 pr_debug("data_exch_rf_tech_and_mode 0x%x\n", 510 ntf.data_exch_rf_tech_and_mode); 511 pr_debug("data_exch_tx_bit_rate 0x%x\n", ntf.data_exch_tx_bit_rate); 512 pr_debug("data_exch_rx_bit_rate 0x%x\n", ntf.data_exch_rx_bit_rate); 513 pr_debug("activation_params_len %d\n", ntf.activation_params_len); 514 515 if (ntf.activation_params_len > 0) { 516 switch (ntf.rf_interface) { 517 case NCI_RF_INTERFACE_ISO_DEP: 518 err = nci_extract_activation_params_iso_dep(ndev, 519 &ntf, data); 520 break; 521 522 case NCI_RF_INTERFACE_NFC_DEP: 523 err = nci_extract_activation_params_nfc_dep(ndev, 524 &ntf, data); 525 break; 526 527 case NCI_RF_INTERFACE_FRAME: 528 /* no activation params */ 529 break; 530 531 default: 532 pr_err("unsupported rf_interface 0x%x\n", 533 ntf.rf_interface); 534 err = NCI_STATUS_RF_PROTOCOL_ERROR; 535 break; 536 } 537 } 538 539exit: 540 if (err == NCI_STATUS_OK) { 541 ndev->max_data_pkt_payload_size = ntf.max_data_pkt_payload_size; 542 ndev->initial_num_credits = ntf.initial_num_credits; 543 544 /* set the available credits to initial value */ 545 atomic_set(&ndev->credits_cnt, ndev->initial_num_credits); 546 547 /* store general bytes to be reported later in dep_link_up */ 548 if (ntf.rf_interface == NCI_RF_INTERFACE_NFC_DEP) { 549 ndev->remote_gb_len = 0; 550 551 if (ntf.activation_params_len > 0) { 552 /* ATR_RES general bytes at offset 15 */ 553 ndev->remote_gb_len = min_t(__u8, 554 (ntf.activation_params 555 .poll_nfc_dep.atr_res_len 556 - NFC_ATR_RES_GT_OFFSET), 557 NFC_MAX_GT_LEN); 558 memcpy(ndev->remote_gb, 559 (ntf.activation_params.poll_nfc_dep 560 .atr_res + NFC_ATR_RES_GT_OFFSET), 561 ndev->remote_gb_len); 562 } 563 } 564 } 565 566 if (atomic_read(&ndev->state) == NCI_DISCOVERY) { 567 /* A single target was found and activated automatically */ 568 atomic_set(&ndev->state, NCI_POLL_ACTIVE); 569 if (err == NCI_STATUS_OK) 570 nci_target_auto_activated(ndev, &ntf); 571 } else { /* ndev->state == NCI_W4_HOST_SELECT */ 572 /* A selected target was activated, so complete the request */ 573 atomic_set(&ndev->state, NCI_POLL_ACTIVE); 574 nci_req_complete(ndev, err); 575 } 576} 577 578static void nci_rf_deactivate_ntf_packet(struct nci_dev *ndev, 579 struct sk_buff *skb) 580{ 581 struct nci_rf_deactivate_ntf *ntf = (void *) skb->data; 582 583 pr_debug("entry, type 0x%x, reason 0x%x\n", ntf->type, ntf->reason); 584 585 /* drop tx data queue */ 586 skb_queue_purge(&ndev->tx_q); 587 588 /* drop partial rx data packet */ 589 if (ndev->rx_data_reassembly) { 590 kfree_skb(ndev->rx_data_reassembly); 591 ndev->rx_data_reassembly = NULL; 592 } 593 594 /* complete the data exchange transaction, if exists */ 595 if (test_bit(NCI_DATA_EXCHANGE, &ndev->flags)) 596 nci_data_exchange_complete(ndev, NULL, -EIO); 597 598 nci_clear_target_list(ndev); 599 atomic_set(&ndev->state, NCI_IDLE); 600 nci_req_complete(ndev, NCI_STATUS_OK); 601} 602 603void nci_ntf_packet(struct nci_dev *ndev, struct sk_buff *skb) 604{ 605 __u16 ntf_opcode = nci_opcode(skb->data); 606 607 pr_debug("NCI RX: MT=ntf, PBF=%d, GID=0x%x, OID=0x%x, plen=%d\n", 608 nci_pbf(skb->data), 609 nci_opcode_gid(ntf_opcode), 610 nci_opcode_oid(ntf_opcode), 611 nci_plen(skb->data)); 612 613 /* strip the nci control header */ 614 skb_pull(skb, NCI_CTRL_HDR_SIZE); 615 616 switch (ntf_opcode) { 617 case NCI_OP_CORE_CONN_CREDITS_NTF: 618 nci_core_conn_credits_ntf_packet(ndev, skb); 619 break; 620 621 case NCI_OP_CORE_GENERIC_ERROR_NTF: 622 nci_core_generic_error_ntf_packet(ndev, skb); 623 break; 624 625 case NCI_OP_CORE_INTF_ERROR_NTF: 626 nci_core_conn_intf_error_ntf_packet(ndev, skb); 627 break; 628 629 case NCI_OP_RF_DISCOVER_NTF: 630 nci_rf_discover_ntf_packet(ndev, skb); 631 break; 632 633 case NCI_OP_RF_INTF_ACTIVATED_NTF: 634 nci_rf_intf_activated_ntf_packet(ndev, skb); 635 break; 636 637 case NCI_OP_RF_DEACTIVATE_NTF: 638 nci_rf_deactivate_ntf_packet(ndev, skb); 639 break; 640 641 default: 642 pr_err("unknown ntf opcode 0x%x\n", ntf_opcode); 643 break; 644 } 645 646 kfree_skb(skb); 647} 648