1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Driver for NXP PN533 NFC Chip - core functions 4 * 5 * Copyright (C) 2011 Instituto Nokia de Tecnologia 6 * Copyright (C) 2012-2013 Tieto Poland 7 */ 8 9#include <linux/device.h> 10#include <linux/kernel.h> 11#include <linux/module.h> 12#include <linux/slab.h> 13#include <linux/nfc.h> 14#include <linux/netdevice.h> 15#include <net/nfc/nfc.h> 16#include "pn533.h" 17 18#define VERSION "0.3" 19 20/* How much time we spend listening for initiators */ 21#define PN533_LISTEN_TIME 2 22/* Delay between each poll frame (ms) */ 23#define PN533_POLL_INTERVAL 10 24 25/* structs for pn533 commands */ 26 27/* PN533_CMD_GET_FIRMWARE_VERSION */ 28struct pn533_fw_version { 29 u8 ic; 30 u8 ver; 31 u8 rev; 32 u8 support; 33}; 34 35/* PN533_CMD_RF_CONFIGURATION */ 36#define PN533_CFGITEM_RF_FIELD 0x01 37#define PN533_CFGITEM_TIMING 0x02 38#define PN533_CFGITEM_MAX_RETRIES 0x05 39#define PN533_CFGITEM_PASORI 0x82 40 41#define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2 42#define PN533_CFGITEM_RF_FIELD_ON 0x1 43#define PN533_CFGITEM_RF_FIELD_OFF 0x0 44 45#define PN533_CONFIG_TIMING_102 0xb 46#define PN533_CONFIG_TIMING_204 0xc 47#define PN533_CONFIG_TIMING_409 0xd 48#define PN533_CONFIG_TIMING_819 0xe 49 50#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00 51#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF 52 53struct pn533_config_max_retries { 54 u8 mx_rty_atr; 55 u8 mx_rty_psl; 56 u8 mx_rty_passive_act; 57} __packed; 58 59struct pn533_config_timing { 60 u8 rfu; 61 u8 atr_res_timeout; 62 u8 dep_timeout; 63} __packed; 64 65/* PN533_CMD_IN_LIST_PASSIVE_TARGET */ 66 67/* felica commands opcode */ 68#define PN533_FELICA_OPC_SENSF_REQ 0 69#define PN533_FELICA_OPC_SENSF_RES 1 70/* felica SENSF_REQ parameters */ 71#define PN533_FELICA_SENSF_SC_ALL 0xFFFF 72#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0 73#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1 74#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2 75 76/* type B initiator_data values */ 77#define PN533_TYPE_B_AFI_ALL_FAMILIES 0 78#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0 79#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1 80 81union pn533_cmd_poll_initdata { 82 struct { 83 u8 afi; 84 u8 polling_method; 85 } __packed type_b; 86 struct { 87 u8 opcode; 88 __be16 sc; 89 u8 rc; 90 u8 tsn; 91 } __packed felica; 92}; 93 94struct pn533_poll_modulations { 95 struct { 96 u8 maxtg; 97 u8 brty; 98 union pn533_cmd_poll_initdata initiator_data; 99 } __packed data; 100 u8 len; 101}; 102 103static const struct pn533_poll_modulations poll_mod[] = { 104 [PN533_POLL_MOD_106KBPS_A] = { 105 .data = { 106 .maxtg = 1, 107 .brty = 0, 108 }, 109 .len = 2, 110 }, 111 [PN533_POLL_MOD_212KBPS_FELICA] = { 112 .data = { 113 .maxtg = 1, 114 .brty = 1, 115 .initiator_data.felica = { 116 .opcode = PN533_FELICA_OPC_SENSF_REQ, 117 .sc = PN533_FELICA_SENSF_SC_ALL, 118 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE, 119 .tsn = 0x03, 120 }, 121 }, 122 .len = 7, 123 }, 124 [PN533_POLL_MOD_424KBPS_FELICA] = { 125 .data = { 126 .maxtg = 1, 127 .brty = 2, 128 .initiator_data.felica = { 129 .opcode = PN533_FELICA_OPC_SENSF_REQ, 130 .sc = PN533_FELICA_SENSF_SC_ALL, 131 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE, 132 .tsn = 0x03, 133 }, 134 }, 135 .len = 7, 136 }, 137 [PN533_POLL_MOD_106KBPS_JEWEL] = { 138 .data = { 139 .maxtg = 1, 140 .brty = 4, 141 }, 142 .len = 2, 143 }, 144 [PN533_POLL_MOD_847KBPS_B] = { 145 .data = { 146 .maxtg = 1, 147 .brty = 8, 148 .initiator_data.type_b = { 149 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES, 150 .polling_method = 151 PN533_TYPE_B_POLL_METHOD_TIMESLOT, 152 }, 153 }, 154 .len = 3, 155 }, 156 [PN533_LISTEN_MOD] = { 157 .len = 0, 158 }, 159}; 160 161/* PN533_CMD_IN_ATR */ 162 163struct pn533_cmd_activate_response { 164 u8 status; 165 u8 nfcid3t[10]; 166 u8 didt; 167 u8 bst; 168 u8 brt; 169 u8 to; 170 u8 ppt; 171 /* optional */ 172 u8 gt[]; 173} __packed; 174 175struct pn533_cmd_jump_dep_response { 176 u8 status; 177 u8 tg; 178 u8 nfcid3t[10]; 179 u8 didt; 180 u8 bst; 181 u8 brt; 182 u8 to; 183 u8 ppt; 184 /* optional */ 185 u8 gt[]; 186} __packed; 187 188struct pn532_autopoll_resp { 189 u8 type; 190 u8 ln; 191 u8 tg; 192 u8 tgdata[]; 193}; 194 195/* PN532_CMD_IN_AUTOPOLL */ 196#define PN532_AUTOPOLL_POLLNR_INFINITE 0xff 197#define PN532_AUTOPOLL_PERIOD 0x03 /* in units of 150 ms */ 198 199#define PN532_AUTOPOLL_TYPE_GENERIC_106 0x00 200#define PN532_AUTOPOLL_TYPE_GENERIC_212 0x01 201#define PN532_AUTOPOLL_TYPE_GENERIC_424 0x02 202#define PN532_AUTOPOLL_TYPE_JEWEL 0x04 203#define PN532_AUTOPOLL_TYPE_MIFARE 0x10 204#define PN532_AUTOPOLL_TYPE_FELICA212 0x11 205#define PN532_AUTOPOLL_TYPE_FELICA424 0x12 206#define PN532_AUTOPOLL_TYPE_ISOA 0x20 207#define PN532_AUTOPOLL_TYPE_ISOB 0x23 208#define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106 0x40 209#define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212 0x41 210#define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424 0x42 211#define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106 0x80 212#define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_212 0x81 213#define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_424 0x82 214 215/* PN533_TG_INIT_AS_TARGET */ 216#define PN533_INIT_TARGET_PASSIVE 0x1 217#define PN533_INIT_TARGET_DEP 0x2 218 219#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3 220#define PN533_INIT_TARGET_RESP_ACTIVE 0x1 221#define PN533_INIT_TARGET_RESP_DEP 0x4 222 223/* The rule: value(high byte) + value(low byte) + checksum = 0 */ 224static inline u8 pn533_ext_checksum(u16 value) 225{ 226 return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1; 227} 228 229/* The rule: value + checksum = 0 */ 230static inline u8 pn533_std_checksum(u8 value) 231{ 232 return ~value + 1; 233} 234 235/* The rule: sum(data elements) + checksum = 0 */ 236static u8 pn533_std_data_checksum(u8 *data, int datalen) 237{ 238 u8 sum = 0; 239 int i; 240 241 for (i = 0; i < datalen; i++) 242 sum += data[i]; 243 244 return pn533_std_checksum(sum); 245} 246 247static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code) 248{ 249 struct pn533_std_frame *frame = _frame; 250 251 frame->preamble = 0; 252 frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF); 253 PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT; 254 PN533_FRAME_CMD(frame) = cmd_code; 255 frame->datalen = 2; 256} 257 258static void pn533_std_tx_frame_finish(void *_frame) 259{ 260 struct pn533_std_frame *frame = _frame; 261 262 frame->datalen_checksum = pn533_std_checksum(frame->datalen); 263 264 PN533_STD_FRAME_CHECKSUM(frame) = 265 pn533_std_data_checksum(frame->data, frame->datalen); 266 267 PN533_STD_FRAME_POSTAMBLE(frame) = 0; 268} 269 270static void pn533_std_tx_update_payload_len(void *_frame, int len) 271{ 272 struct pn533_std_frame *frame = _frame; 273 274 frame->datalen += len; 275} 276 277static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev) 278{ 279 u8 checksum; 280 struct pn533_std_frame *stdf = _frame; 281 282 if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF)) 283 return false; 284 285 if (likely(!PN533_STD_IS_EXTENDED(stdf))) { 286 /* Standard frame code */ 287 dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN; 288 289 checksum = pn533_std_checksum(stdf->datalen); 290 if (checksum != stdf->datalen_checksum) 291 return false; 292 293 checksum = pn533_std_data_checksum(stdf->data, stdf->datalen); 294 if (checksum != PN533_STD_FRAME_CHECKSUM(stdf)) 295 return false; 296 } else { 297 /* Extended */ 298 struct pn533_ext_frame *eif = _frame; 299 300 dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN; 301 302 checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen)); 303 if (checksum != eif->datalen_checksum) 304 return false; 305 306 /* check data checksum */ 307 checksum = pn533_std_data_checksum(eif->data, 308 be16_to_cpu(eif->datalen)); 309 if (checksum != PN533_EXT_FRAME_CHECKSUM(eif)) 310 return false; 311 } 312 313 return true; 314} 315 316bool pn533_rx_frame_is_ack(void *_frame) 317{ 318 struct pn533_std_frame *frame = _frame; 319 320 if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF)) 321 return false; 322 323 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF) 324 return false; 325 326 return true; 327} 328EXPORT_SYMBOL_GPL(pn533_rx_frame_is_ack); 329 330static inline int pn533_std_rx_frame_size(void *frame) 331{ 332 struct pn533_std_frame *f = frame; 333 334 /* check for Extended Information frame */ 335 if (PN533_STD_IS_EXTENDED(f)) { 336 struct pn533_ext_frame *eif = frame; 337 338 return sizeof(struct pn533_ext_frame) 339 + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN; 340 } 341 342 return sizeof(struct pn533_std_frame) + f->datalen + 343 PN533_STD_FRAME_TAIL_LEN; 344} 345 346static u8 pn533_std_get_cmd_code(void *frame) 347{ 348 struct pn533_std_frame *f = frame; 349 struct pn533_ext_frame *eif = frame; 350 351 if (PN533_STD_IS_EXTENDED(f)) 352 return PN533_FRAME_CMD(eif); 353 else 354 return PN533_FRAME_CMD(f); 355} 356 357bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame) 358{ 359 return (dev->ops->get_cmd_code(frame) == 360 PN533_CMD_RESPONSE(dev->cmd->code)); 361} 362EXPORT_SYMBOL_GPL(pn533_rx_frame_is_cmd_response); 363 364 365static struct pn533_frame_ops pn533_std_frame_ops = { 366 .tx_frame_init = pn533_std_tx_frame_init, 367 .tx_frame_finish = pn533_std_tx_frame_finish, 368 .tx_update_payload_len = pn533_std_tx_update_payload_len, 369 .tx_header_len = PN533_STD_FRAME_HEADER_LEN, 370 .tx_tail_len = PN533_STD_FRAME_TAIL_LEN, 371 372 .rx_is_frame_valid = pn533_std_rx_frame_is_valid, 373 .rx_frame_size = pn533_std_rx_frame_size, 374 .rx_header_len = PN533_STD_FRAME_HEADER_LEN, 375 .rx_tail_len = PN533_STD_FRAME_TAIL_LEN, 376 377 .max_payload_len = PN533_STD_FRAME_MAX_PAYLOAD_LEN, 378 .get_cmd_code = pn533_std_get_cmd_code, 379}; 380 381static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code, 382 struct sk_buff *skb) 383{ 384 /* payload is already there, just update datalen */ 385 int payload_len = skb->len; 386 struct pn533_frame_ops *ops = dev->ops; 387 388 389 skb_push(skb, ops->tx_header_len); 390 skb_put(skb, ops->tx_tail_len); 391 392 ops->tx_frame_init(skb->data, cmd_code); 393 ops->tx_update_payload_len(skb->data, payload_len); 394 ops->tx_frame_finish(skb->data); 395} 396 397static int pn533_send_async_complete(struct pn533 *dev) 398{ 399 struct pn533_cmd *cmd = dev->cmd; 400 struct sk_buff *resp; 401 int status, rc = 0; 402 403 if (!cmd) { 404 dev_dbg(dev->dev, "%s: cmd not set\n", __func__); 405 goto done; 406 } 407 408 dev_kfree_skb(cmd->req); 409 410 status = cmd->status; 411 resp = cmd->resp; 412 413 if (status < 0) { 414 rc = cmd->complete_cb(dev, cmd->complete_cb_context, 415 ERR_PTR(status)); 416 dev_kfree_skb(resp); 417 goto done; 418 } 419 420 /* when no response is set we got interrupted */ 421 if (!resp) 422 resp = ERR_PTR(-EINTR); 423 424 if (!IS_ERR(resp)) { 425 skb_pull(resp, dev->ops->rx_header_len); 426 skb_trim(resp, resp->len - dev->ops->rx_tail_len); 427 } 428 429 rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp); 430 431done: 432 kfree(cmd); 433 dev->cmd = NULL; 434 return rc; 435} 436 437static int __pn533_send_async(struct pn533 *dev, u8 cmd_code, 438 struct sk_buff *req, 439 pn533_send_async_complete_t complete_cb, 440 void *complete_cb_context) 441{ 442 struct pn533_cmd *cmd; 443 int rc = 0; 444 445 dev_dbg(dev->dev, "Sending command 0x%x\n", cmd_code); 446 447 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 448 if (!cmd) 449 return -ENOMEM; 450 451 cmd->code = cmd_code; 452 cmd->req = req; 453 cmd->complete_cb = complete_cb; 454 cmd->complete_cb_context = complete_cb_context; 455 456 pn533_build_cmd_frame(dev, cmd_code, req); 457 458 mutex_lock(&dev->cmd_lock); 459 460 if (!dev->cmd_pending) { 461 dev->cmd = cmd; 462 rc = dev->phy_ops->send_frame(dev, req); 463 if (rc) { 464 dev->cmd = NULL; 465 goto error; 466 } 467 468 dev->cmd_pending = 1; 469 goto unlock; 470 } 471 472 dev_dbg(dev->dev, "%s Queueing command 0x%x\n", 473 __func__, cmd_code); 474 475 INIT_LIST_HEAD(&cmd->queue); 476 list_add_tail(&cmd->queue, &dev->cmd_queue); 477 478 goto unlock; 479 480error: 481 kfree(cmd); 482unlock: 483 mutex_unlock(&dev->cmd_lock); 484 return rc; 485} 486 487static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code, 488 struct sk_buff *req, 489 pn533_send_async_complete_t complete_cb, 490 void *complete_cb_context) 491{ 492 return __pn533_send_async(dev, cmd_code, req, complete_cb, 493 complete_cb_context); 494} 495 496static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code, 497 struct sk_buff *req, 498 pn533_send_async_complete_t complete_cb, 499 void *complete_cb_context) 500{ 501 return __pn533_send_async(dev, cmd_code, req, complete_cb, 502 complete_cb_context); 503} 504 505/* 506 * pn533_send_cmd_direct_async 507 * 508 * The function sends a priority cmd directly to the chip omitting the cmd 509 * queue. It's intended to be used by chaining mechanism of received responses 510 * where the host has to request every single chunk of data before scheduling 511 * next cmd from the queue. 512 */ 513static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code, 514 struct sk_buff *req, 515 pn533_send_async_complete_t complete_cb, 516 void *complete_cb_context) 517{ 518 struct pn533_cmd *cmd; 519 int rc; 520 521 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 522 if (!cmd) 523 return -ENOMEM; 524 525 cmd->code = cmd_code; 526 cmd->req = req; 527 cmd->complete_cb = complete_cb; 528 cmd->complete_cb_context = complete_cb_context; 529 530 pn533_build_cmd_frame(dev, cmd_code, req); 531 532 dev->cmd = cmd; 533 rc = dev->phy_ops->send_frame(dev, req); 534 if (rc < 0) { 535 dev->cmd = NULL; 536 kfree(cmd); 537 } 538 539 return rc; 540} 541 542static void pn533_wq_cmd_complete(struct work_struct *work) 543{ 544 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work); 545 int rc; 546 547 rc = pn533_send_async_complete(dev); 548 if (rc != -EINPROGRESS) 549 queue_work(dev->wq, &dev->cmd_work); 550} 551 552static void pn533_wq_cmd(struct work_struct *work) 553{ 554 struct pn533 *dev = container_of(work, struct pn533, cmd_work); 555 struct pn533_cmd *cmd; 556 int rc; 557 558 mutex_lock(&dev->cmd_lock); 559 560 if (list_empty(&dev->cmd_queue)) { 561 dev->cmd_pending = 0; 562 mutex_unlock(&dev->cmd_lock); 563 return; 564 } 565 566 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue); 567 568 list_del(&cmd->queue); 569 570 mutex_unlock(&dev->cmd_lock); 571 572 dev->cmd = cmd; 573 rc = dev->phy_ops->send_frame(dev, cmd->req); 574 if (rc < 0) { 575 dev->cmd = NULL; 576 dev_kfree_skb(cmd->req); 577 kfree(cmd); 578 return; 579 } 580 581} 582 583struct pn533_sync_cmd_response { 584 struct sk_buff *resp; 585 struct completion done; 586}; 587 588static int pn533_send_sync_complete(struct pn533 *dev, void *_arg, 589 struct sk_buff *resp) 590{ 591 struct pn533_sync_cmd_response *arg = _arg; 592 593 arg->resp = resp; 594 complete(&arg->done); 595 596 return 0; 597} 598 599/* pn533_send_cmd_sync 600 * 601 * Please note the req parameter is freed inside the function to 602 * limit a number of return value interpretations by the caller. 603 * 604 * 1. negative in case of error during TX path -> req should be freed 605 * 606 * 2. negative in case of error during RX path -> req should not be freed 607 * as it's been already freed at the beginning of RX path by 608 * async_complete_cb. 609 * 610 * 3. valid pointer in case of successful RX path 611 * 612 * A caller has to check a return value with IS_ERR macro. If the test pass, 613 * the returned pointer is valid. 614 * 615 */ 616static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code, 617 struct sk_buff *req) 618{ 619 int rc; 620 struct pn533_sync_cmd_response arg; 621 622 init_completion(&arg.done); 623 624 rc = pn533_send_cmd_async(dev, cmd_code, req, 625 pn533_send_sync_complete, &arg); 626 if (rc) { 627 dev_kfree_skb(req); 628 return ERR_PTR(rc); 629 } 630 631 wait_for_completion(&arg.done); 632 633 return arg.resp; 634} 635 636static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size) 637{ 638 struct sk_buff *skb; 639 640 skb = alloc_skb(dev->ops->tx_header_len + 641 size + 642 dev->ops->tx_tail_len, GFP_KERNEL); 643 644 if (skb) 645 skb_reserve(skb, dev->ops->tx_header_len); 646 647 return skb; 648} 649 650struct pn533_target_type_a { 651 __be16 sens_res; 652 u8 sel_res; 653 u8 nfcid_len; 654 u8 nfcid_data[]; 655} __packed; 656 657 658#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6)) 659#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0)) 660#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8)) 661 662#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00 663#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C 664 665#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5) 666#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2) 667 668#define PN533_TYPE_A_SEL_PROT_MIFARE 0 669#define PN533_TYPE_A_SEL_PROT_ISO14443 1 670#define PN533_TYPE_A_SEL_PROT_DEP 2 671#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3 672 673static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a, 674 int target_data_len) 675{ 676 u8 ssd; 677 u8 platconf; 678 679 if (target_data_len < sizeof(struct pn533_target_type_a)) 680 return false; 681 682 /* 683 * The length check of nfcid[] and ats[] are not being performed because 684 * the values are not being used 685 */ 686 687 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ 688 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res); 689 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res); 690 691 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && 692 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || 693 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && 694 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) 695 return false; 696 697 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */ 698 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0) 699 return false; 700 701 if (type_a->nfcid_len > NFC_NFCID1_MAXSIZE) 702 return false; 703 704 return true; 705} 706 707static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data, 708 int tgt_data_len) 709{ 710 struct pn533_target_type_a *tgt_type_a; 711 712 tgt_type_a = (struct pn533_target_type_a *)tgt_data; 713 714 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len)) 715 return -EPROTO; 716 717 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) { 718 case PN533_TYPE_A_SEL_PROT_MIFARE: 719 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK; 720 break; 721 case PN533_TYPE_A_SEL_PROT_ISO14443: 722 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK; 723 break; 724 case PN533_TYPE_A_SEL_PROT_DEP: 725 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; 726 break; 727 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP: 728 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK | 729 NFC_PROTO_NFC_DEP_MASK; 730 break; 731 } 732 733 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res); 734 nfc_tgt->sel_res = tgt_type_a->sel_res; 735 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len; 736 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len); 737 738 return 0; 739} 740 741struct pn533_target_felica { 742 u8 pol_res; 743 u8 opcode; 744 u8 nfcid2[NFC_NFCID2_MAXSIZE]; 745 u8 pad[8]; 746 /* optional */ 747 u8 syst_code[]; 748} __packed; 749 750#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01 751#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE 752 753static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica, 754 int target_data_len) 755{ 756 if (target_data_len < sizeof(struct pn533_target_felica)) 757 return false; 758 759 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES) 760 return false; 761 762 return true; 763} 764 765static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data, 766 int tgt_data_len) 767{ 768 struct pn533_target_felica *tgt_felica; 769 770 tgt_felica = (struct pn533_target_felica *)tgt_data; 771 772 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len)) 773 return -EPROTO; 774 775 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) && 776 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2)) 777 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; 778 else 779 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK; 780 781 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9); 782 nfc_tgt->sensf_res_len = 9; 783 784 memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE); 785 nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE; 786 787 return 0; 788} 789 790struct pn533_target_jewel { 791 __be16 sens_res; 792 u8 jewelid[4]; 793} __packed; 794 795static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel, 796 int target_data_len) 797{ 798 u8 ssd; 799 u8 platconf; 800 801 if (target_data_len < sizeof(struct pn533_target_jewel)) 802 return false; 803 804 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ 805 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res); 806 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res); 807 808 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && 809 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || 810 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && 811 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) 812 return false; 813 814 return true; 815} 816 817static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data, 818 int tgt_data_len) 819{ 820 struct pn533_target_jewel *tgt_jewel; 821 822 tgt_jewel = (struct pn533_target_jewel *)tgt_data; 823 824 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len)) 825 return -EPROTO; 826 827 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK; 828 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res); 829 nfc_tgt->nfcid1_len = 4; 830 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len); 831 832 return 0; 833} 834 835struct pn533_type_b_prot_info { 836 u8 bitrate; 837 u8 fsci_type; 838 u8 fwi_adc_fo; 839} __packed; 840 841#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4) 842#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0) 843#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8 844 845struct pn533_type_b_sens_res { 846 u8 opcode; 847 u8 nfcid[4]; 848 u8 appdata[4]; 849 struct pn533_type_b_prot_info prot_info; 850} __packed; 851 852#define PN533_TYPE_B_OPC_SENSB_RES 0x50 853 854struct pn533_target_type_b { 855 struct pn533_type_b_sens_res sensb_res; 856 u8 attrib_res_len; 857 u8 attrib_res[]; 858} __packed; 859 860static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b, 861 int target_data_len) 862{ 863 if (target_data_len < sizeof(struct pn533_target_type_b)) 864 return false; 865 866 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES) 867 return false; 868 869 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) & 870 PN533_TYPE_B_PROT_TYPE_RFU_MASK) 871 return false; 872 873 return true; 874} 875 876static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data, 877 int tgt_data_len) 878{ 879 struct pn533_target_type_b *tgt_type_b; 880 881 tgt_type_b = (struct pn533_target_type_b *)tgt_data; 882 883 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len)) 884 return -EPROTO; 885 886 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK; 887 888 return 0; 889} 890 891static void pn533_poll_reset_mod_list(struct pn533 *dev); 892static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata, 893 int tgdata_len) 894{ 895 struct nfc_target nfc_tgt; 896 int rc; 897 898 dev_dbg(dev->dev, "%s: modulation=%d\n", 899 __func__, dev->poll_mod_curr); 900 901 if (tg != 1) 902 return -EPROTO; 903 904 memset(&nfc_tgt, 0, sizeof(struct nfc_target)); 905 906 switch (dev->poll_mod_curr) { 907 case PN533_POLL_MOD_106KBPS_A: 908 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len); 909 break; 910 case PN533_POLL_MOD_212KBPS_FELICA: 911 case PN533_POLL_MOD_424KBPS_FELICA: 912 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len); 913 break; 914 case PN533_POLL_MOD_106KBPS_JEWEL: 915 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len); 916 break; 917 case PN533_POLL_MOD_847KBPS_B: 918 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len); 919 break; 920 default: 921 nfc_err(dev->dev, 922 "Unknown current poll modulation\n"); 923 return -EPROTO; 924 } 925 926 if (rc) 927 return rc; 928 929 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) { 930 dev_dbg(dev->dev, 931 "The Tg found doesn't have the desired protocol\n"); 932 return -EAGAIN; 933 } 934 935 dev_dbg(dev->dev, 936 "Target found - supported protocols: 0x%x\n", 937 nfc_tgt.supported_protocols); 938 939 dev->tgt_available_prots = nfc_tgt.supported_protocols; 940 941 pn533_poll_reset_mod_list(dev); 942 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1); 943 944 return 0; 945} 946 947static inline void pn533_poll_next_mod(struct pn533 *dev) 948{ 949 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count; 950} 951 952static void pn533_poll_reset_mod_list(struct pn533 *dev) 953{ 954 dev->poll_mod_count = 0; 955} 956 957static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index) 958{ 959 dev->poll_mod_active[dev->poll_mod_count] = 960 (struct pn533_poll_modulations *)&poll_mod[mod_index]; 961 dev->poll_mod_count++; 962} 963 964static void pn533_poll_create_mod_list(struct pn533 *dev, 965 u32 im_protocols, u32 tm_protocols) 966{ 967 pn533_poll_reset_mod_list(dev); 968 969 if ((im_protocols & NFC_PROTO_MIFARE_MASK) || 970 (im_protocols & NFC_PROTO_ISO14443_MASK) || 971 (im_protocols & NFC_PROTO_NFC_DEP_MASK)) 972 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A); 973 974 if (im_protocols & NFC_PROTO_FELICA_MASK || 975 im_protocols & NFC_PROTO_NFC_DEP_MASK) { 976 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA); 977 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA); 978 } 979 980 if (im_protocols & NFC_PROTO_JEWEL_MASK) 981 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL); 982 983 if (im_protocols & NFC_PROTO_ISO14443_B_MASK) 984 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B); 985 986 if (tm_protocols) 987 pn533_poll_add_mod(dev, PN533_LISTEN_MOD); 988} 989 990static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp) 991{ 992 u8 nbtg, tg, *tgdata; 993 int rc, tgdata_len; 994 995 /* Toggle the DEP polling */ 996 if (dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) 997 dev->poll_dep = 1; 998 999 nbtg = resp->data[0]; 1000 tg = resp->data[1]; 1001 tgdata = &resp->data[2]; 1002 tgdata_len = resp->len - 2; /* nbtg + tg */ 1003 1004 if (nbtg) { 1005 rc = pn533_target_found(dev, tg, tgdata, tgdata_len); 1006 1007 /* We must stop the poll after a valid target found */ 1008 if (rc == 0) 1009 return 0; 1010 } 1011 1012 return -EAGAIN; 1013} 1014 1015static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev) 1016{ 1017 struct sk_buff *skb; 1018 u8 *felica, *nfcid3; 1019 1020 u8 *gbytes = dev->gb; 1021 size_t gbytes_len = dev->gb_len; 1022 1023 u8 felica_params[18] = {0x1, 0xfe, /* DEP */ 1024 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */ 1025 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 1026 0xff, 0xff}; /* System code */ 1027 1028 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */ 1029 0x0, 0x0, 0x0, 1030 0x40}; /* SEL_RES for DEP */ 1031 1032 unsigned int skb_len = 36 + /* 1033 * mode (1), mifare (6), 1034 * felica (18), nfcid3 (10), gb_len (1) 1035 */ 1036 gbytes_len + 1037 1; /* len Tk*/ 1038 1039 skb = pn533_alloc_skb(dev, skb_len); 1040 if (!skb) 1041 return NULL; 1042 1043 /* DEP support only */ 1044 skb_put_u8(skb, PN533_INIT_TARGET_DEP); 1045 1046 /* MIFARE params */ 1047 skb_put_data(skb, mifare_params, 6); 1048 1049 /* Felica params */ 1050 felica = skb_put_data(skb, felica_params, 18); 1051 get_random_bytes(felica + 2, 6); 1052 1053 /* NFCID3 */ 1054 nfcid3 = skb_put_zero(skb, 10); 1055 memcpy(nfcid3, felica, 8); 1056 1057 /* General bytes */ 1058 skb_put_u8(skb, gbytes_len); 1059 1060 skb_put_data(skb, gbytes, gbytes_len); 1061 1062 /* Len Tk */ 1063 skb_put_u8(skb, 0); 1064 1065 return skb; 1066} 1067 1068static void pn533_wq_tm_mi_recv(struct work_struct *work); 1069static struct sk_buff *pn533_build_response(struct pn533 *dev); 1070 1071static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg, 1072 struct sk_buff *resp) 1073{ 1074 struct sk_buff *skb; 1075 u8 status, ret, mi; 1076 int rc; 1077 1078 if (IS_ERR(resp)) { 1079 skb_queue_purge(&dev->resp_q); 1080 return PTR_ERR(resp); 1081 } 1082 1083 status = resp->data[0]; 1084 1085 ret = status & PN533_CMD_RET_MASK; 1086 mi = status & PN533_CMD_MI_MASK; 1087 1088 skb_pull(resp, sizeof(status)); 1089 1090 if (ret != PN533_CMD_RET_SUCCESS) { 1091 rc = -EIO; 1092 goto error; 1093 } 1094 1095 skb_queue_tail(&dev->resp_q, resp); 1096 1097 if (mi) { 1098 queue_work(dev->wq, &dev->mi_tm_rx_work); 1099 return -EINPROGRESS; 1100 } 1101 1102 skb = pn533_build_response(dev); 1103 if (!skb) { 1104 rc = -EIO; 1105 goto error; 1106 } 1107 1108 return nfc_tm_data_received(dev->nfc_dev, skb); 1109 1110error: 1111 nfc_tm_deactivated(dev->nfc_dev); 1112 dev->tgt_mode = 0; 1113 skb_queue_purge(&dev->resp_q); 1114 dev_kfree_skb(resp); 1115 1116 return rc; 1117} 1118 1119static void pn533_wq_tm_mi_recv(struct work_struct *work) 1120{ 1121 struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work); 1122 struct sk_buff *skb; 1123 int rc; 1124 1125 skb = pn533_alloc_skb(dev, 0); 1126 if (!skb) 1127 return; 1128 1129 rc = pn533_send_cmd_direct_async(dev, 1130 PN533_CMD_TG_GET_DATA, 1131 skb, 1132 pn533_tm_get_data_complete, 1133 NULL); 1134 1135 if (rc < 0) 1136 dev_kfree_skb(skb); 1137} 1138 1139static int pn533_tm_send_complete(struct pn533 *dev, void *arg, 1140 struct sk_buff *resp); 1141static void pn533_wq_tm_mi_send(struct work_struct *work) 1142{ 1143 struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work); 1144 struct sk_buff *skb; 1145 int rc; 1146 1147 /* Grab the first skb in the queue */ 1148 skb = skb_dequeue(&dev->fragment_skb); 1149 if (skb == NULL) { /* No more data */ 1150 /* Reset the queue for future use */ 1151 skb_queue_head_init(&dev->fragment_skb); 1152 goto error; 1153 } 1154 1155 /* last entry - remove MI bit */ 1156 if (skb_queue_len(&dev->fragment_skb) == 0) { 1157 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA, 1158 skb, pn533_tm_send_complete, NULL); 1159 } else 1160 rc = pn533_send_cmd_direct_async(dev, 1161 PN533_CMD_TG_SET_META_DATA, 1162 skb, pn533_tm_send_complete, NULL); 1163 1164 if (rc == 0) /* success */ 1165 return; 1166 1167 dev_err(dev->dev, 1168 "Error %d when trying to perform set meta data_exchange", rc); 1169 1170 dev_kfree_skb(skb); 1171 1172error: 1173 dev->phy_ops->send_ack(dev, GFP_KERNEL); 1174 queue_work(dev->wq, &dev->cmd_work); 1175} 1176 1177static void pn533_wq_tg_get_data(struct work_struct *work) 1178{ 1179 struct pn533 *dev = container_of(work, struct pn533, tg_work); 1180 struct sk_buff *skb; 1181 int rc; 1182 1183 skb = pn533_alloc_skb(dev, 0); 1184 if (!skb) 1185 return; 1186 1187 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb, 1188 pn533_tm_get_data_complete, NULL); 1189 1190 if (rc < 0) 1191 dev_kfree_skb(skb); 1192} 1193 1194#define ATR_REQ_GB_OFFSET 17 1195static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp) 1196{ 1197 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb; 1198 size_t gb_len; 1199 int rc; 1200 1201 if (resp->len < ATR_REQ_GB_OFFSET + 1) 1202 return -EINVAL; 1203 1204 mode = resp->data[0]; 1205 cmd = &resp->data[1]; 1206 1207 dev_dbg(dev->dev, "Target mode 0x%x len %d\n", 1208 mode, resp->len); 1209 1210 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) == 1211 PN533_INIT_TARGET_RESP_ACTIVE) 1212 comm_mode = NFC_COMM_ACTIVE; 1213 1214 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */ 1215 return -EOPNOTSUPP; 1216 1217 gb = cmd + ATR_REQ_GB_OFFSET; 1218 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1); 1219 1220 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK, 1221 comm_mode, gb, gb_len); 1222 if (rc < 0) { 1223 nfc_err(dev->dev, 1224 "Error when signaling target activation\n"); 1225 return rc; 1226 } 1227 1228 dev->tgt_mode = 1; 1229 queue_work(dev->wq, &dev->tg_work); 1230 1231 return 0; 1232} 1233 1234static void pn533_listen_mode_timer(struct timer_list *t) 1235{ 1236 struct pn533 *dev = from_timer(dev, t, listen_timer); 1237 1238 dev->cancel_listen = 1; 1239 1240 pn533_poll_next_mod(dev); 1241 1242 queue_delayed_work(dev->wq, &dev->poll_work, 1243 msecs_to_jiffies(PN533_POLL_INTERVAL)); 1244} 1245 1246static int pn533_rf_complete(struct pn533 *dev, void *arg, 1247 struct sk_buff *resp) 1248{ 1249 int rc = 0; 1250 1251 if (IS_ERR(resp)) { 1252 rc = PTR_ERR(resp); 1253 1254 nfc_err(dev->dev, "RF setting error %d\n", rc); 1255 1256 return rc; 1257 } 1258 1259 queue_delayed_work(dev->wq, &dev->poll_work, 1260 msecs_to_jiffies(PN533_POLL_INTERVAL)); 1261 1262 dev_kfree_skb(resp); 1263 return rc; 1264} 1265 1266static void pn533_wq_rf(struct work_struct *work) 1267{ 1268 struct pn533 *dev = container_of(work, struct pn533, rf_work); 1269 struct sk_buff *skb; 1270 int rc; 1271 1272 skb = pn533_alloc_skb(dev, 2); 1273 if (!skb) 1274 return; 1275 1276 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD); 1277 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA); 1278 1279 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb, 1280 pn533_rf_complete, NULL); 1281 if (rc < 0) { 1282 dev_kfree_skb(skb); 1283 nfc_err(dev->dev, "RF setting error %d\n", rc); 1284 } 1285} 1286 1287static int pn533_poll_dep_complete(struct pn533 *dev, void *arg, 1288 struct sk_buff *resp) 1289{ 1290 struct pn533_cmd_jump_dep_response *rsp; 1291 struct nfc_target nfc_target; 1292 u8 target_gt_len; 1293 int rc; 1294 1295 if (IS_ERR(resp)) 1296 return PTR_ERR(resp); 1297 1298 memset(&nfc_target, 0, sizeof(struct nfc_target)); 1299 1300 rsp = (struct pn533_cmd_jump_dep_response *)resp->data; 1301 1302 rc = rsp->status & PN533_CMD_RET_MASK; 1303 if (rc != PN533_CMD_RET_SUCCESS) { 1304 /* Not target found, turn radio off */ 1305 queue_work(dev->wq, &dev->rf_work); 1306 1307 dev_kfree_skb(resp); 1308 return 0; 1309 } 1310 1311 dev_dbg(dev->dev, "Creating new target"); 1312 1313 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK; 1314 nfc_target.nfcid1_len = 10; 1315 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len); 1316 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1); 1317 if (rc) 1318 goto error; 1319 1320 dev->tgt_available_prots = 0; 1321 dev->tgt_active_prot = NFC_PROTO_NFC_DEP; 1322 1323 /* ATR_RES general bytes are located at offset 17 */ 1324 target_gt_len = resp->len - 17; 1325 rc = nfc_set_remote_general_bytes(dev->nfc_dev, 1326 rsp->gt, target_gt_len); 1327 if (!rc) { 1328 rc = nfc_dep_link_is_up(dev->nfc_dev, 1329 dev->nfc_dev->targets[0].idx, 1330 0, NFC_RF_INITIATOR); 1331 1332 if (!rc) 1333 pn533_poll_reset_mod_list(dev); 1334 } 1335error: 1336 dev_kfree_skb(resp); 1337 return rc; 1338} 1339 1340#define PASSIVE_DATA_LEN 5 1341static int pn533_poll_dep(struct nfc_dev *nfc_dev) 1342{ 1343 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1344 struct sk_buff *skb; 1345 int rc, skb_len; 1346 u8 *next, nfcid3[NFC_NFCID3_MAXSIZE]; 1347 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3}; 1348 1349 if (!dev->gb) { 1350 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len); 1351 1352 if (!dev->gb || !dev->gb_len) { 1353 dev->poll_dep = 0; 1354 queue_work(dev->wq, &dev->rf_work); 1355 } 1356 } 1357 1358 skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */ 1359 skb_len += PASSIVE_DATA_LEN; 1360 1361 /* NFCID3 */ 1362 skb_len += NFC_NFCID3_MAXSIZE; 1363 nfcid3[0] = 0x1; 1364 nfcid3[1] = 0xfe; 1365 get_random_bytes(nfcid3 + 2, 6); 1366 1367 skb = pn533_alloc_skb(dev, skb_len); 1368 if (!skb) 1369 return -ENOMEM; 1370 1371 skb_put_u8(skb, 0x01); /* Active */ 1372 skb_put_u8(skb, 0x02); /* 424 kbps */ 1373 1374 next = skb_put(skb, 1); /* Next */ 1375 *next = 0; 1376 1377 /* Copy passive data */ 1378 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN); 1379 *next |= 1; 1380 1381 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */ 1382 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE); 1383 *next |= 2; 1384 1385 skb_put_data(skb, dev->gb, dev->gb_len); 1386 *next |= 4; /* We have some Gi */ 1387 1388 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb, 1389 pn533_poll_dep_complete, NULL); 1390 1391 if (rc < 0) 1392 dev_kfree_skb(skb); 1393 1394 return rc; 1395} 1396 1397static int pn533_autopoll_complete(struct pn533 *dev, void *arg, 1398 struct sk_buff *resp) 1399{ 1400 struct pn532_autopoll_resp *apr; 1401 struct nfc_target nfc_tgt; 1402 u8 nbtg; 1403 int rc; 1404 1405 if (IS_ERR(resp)) { 1406 rc = PTR_ERR(resp); 1407 1408 nfc_err(dev->dev, "%s autopoll complete error %d\n", 1409 __func__, rc); 1410 1411 if (rc == -ENOENT) { 1412 if (dev->poll_mod_count != 0) 1413 return rc; 1414 goto stop_poll; 1415 } else if (rc < 0) { 1416 nfc_err(dev->dev, 1417 "Error %d when running autopoll\n", rc); 1418 goto stop_poll; 1419 } 1420 } 1421 1422 nbtg = resp->data[0]; 1423 if ((nbtg > 2) || (nbtg <= 0)) 1424 return -EAGAIN; 1425 1426 apr = (struct pn532_autopoll_resp *)&resp->data[1]; 1427 while (nbtg--) { 1428 memset(&nfc_tgt, 0, sizeof(struct nfc_target)); 1429 switch (apr->type) { 1430 case PN532_AUTOPOLL_TYPE_ISOA: 1431 dev_dbg(dev->dev, "ISOA\n"); 1432 rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata, 1433 apr->ln - 1); 1434 break; 1435 case PN532_AUTOPOLL_TYPE_FELICA212: 1436 case PN532_AUTOPOLL_TYPE_FELICA424: 1437 dev_dbg(dev->dev, "FELICA\n"); 1438 rc = pn533_target_found_felica(&nfc_tgt, apr->tgdata, 1439 apr->ln - 1); 1440 break; 1441 case PN532_AUTOPOLL_TYPE_JEWEL: 1442 dev_dbg(dev->dev, "JEWEL\n"); 1443 rc = pn533_target_found_jewel(&nfc_tgt, apr->tgdata, 1444 apr->ln - 1); 1445 break; 1446 case PN532_AUTOPOLL_TYPE_ISOB: 1447 dev_dbg(dev->dev, "ISOB\n"); 1448 rc = pn533_target_found_type_b(&nfc_tgt, apr->tgdata, 1449 apr->ln - 1); 1450 break; 1451 case PN532_AUTOPOLL_TYPE_MIFARE: 1452 dev_dbg(dev->dev, "Mifare\n"); 1453 rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata, 1454 apr->ln - 1); 1455 break; 1456 default: 1457 nfc_err(dev->dev, 1458 "Unknown current poll modulation\n"); 1459 rc = -EPROTO; 1460 } 1461 1462 if (rc) 1463 goto done; 1464 1465 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) { 1466 nfc_err(dev->dev, 1467 "The Tg found doesn't have the desired protocol\n"); 1468 rc = -EAGAIN; 1469 goto done; 1470 } 1471 1472 dev->tgt_available_prots = nfc_tgt.supported_protocols; 1473 apr = (struct pn532_autopoll_resp *) 1474 (apr->tgdata + (apr->ln - 1)); 1475 } 1476 1477 pn533_poll_reset_mod_list(dev); 1478 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1); 1479 1480done: 1481 dev_kfree_skb(resp); 1482 return rc; 1483 1484stop_poll: 1485 nfc_err(dev->dev, "autopoll operation has been stopped\n"); 1486 1487 pn533_poll_reset_mod_list(dev); 1488 dev->poll_protocols = 0; 1489 return rc; 1490} 1491 1492static int pn533_poll_complete(struct pn533 *dev, void *arg, 1493 struct sk_buff *resp) 1494{ 1495 struct pn533_poll_modulations *cur_mod; 1496 int rc; 1497 1498 if (IS_ERR(resp)) { 1499 rc = PTR_ERR(resp); 1500 1501 nfc_err(dev->dev, "%s Poll complete error %d\n", 1502 __func__, rc); 1503 1504 if (rc == -ENOENT) { 1505 if (dev->poll_mod_count != 0) 1506 return rc; 1507 goto stop_poll; 1508 } else if (rc < 0) { 1509 nfc_err(dev->dev, 1510 "Error %d when running poll\n", rc); 1511 goto stop_poll; 1512 } 1513 } 1514 1515 cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; 1516 1517 if (cur_mod->len == 0) { /* Target mode */ 1518 del_timer(&dev->listen_timer); 1519 rc = pn533_init_target_complete(dev, resp); 1520 goto done; 1521 } 1522 1523 /* Initiator mode */ 1524 rc = pn533_start_poll_complete(dev, resp); 1525 if (!rc) 1526 goto done; 1527 1528 if (!dev->poll_mod_count) { 1529 dev_dbg(dev->dev, "Polling has been stopped\n"); 1530 goto done; 1531 } 1532 1533 pn533_poll_next_mod(dev); 1534 /* Not target found, turn radio off */ 1535 queue_work(dev->wq, &dev->rf_work); 1536 1537done: 1538 dev_kfree_skb(resp); 1539 return rc; 1540 1541stop_poll: 1542 nfc_err(dev->dev, "Polling operation has been stopped\n"); 1543 1544 pn533_poll_reset_mod_list(dev); 1545 dev->poll_protocols = 0; 1546 return rc; 1547} 1548 1549static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev, 1550 struct pn533_poll_modulations *mod) 1551{ 1552 struct sk_buff *skb; 1553 1554 skb = pn533_alloc_skb(dev, mod->len); 1555 if (!skb) 1556 return NULL; 1557 1558 skb_put_data(skb, &mod->data, mod->len); 1559 1560 return skb; 1561} 1562 1563static int pn533_send_poll_frame(struct pn533 *dev) 1564{ 1565 struct pn533_poll_modulations *mod; 1566 struct sk_buff *skb; 1567 int rc; 1568 u8 cmd_code; 1569 1570 mod = dev->poll_mod_active[dev->poll_mod_curr]; 1571 1572 dev_dbg(dev->dev, "%s mod len %d\n", 1573 __func__, mod->len); 1574 1575 if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep) { 1576 dev->poll_dep = 0; 1577 return pn533_poll_dep(dev->nfc_dev); 1578 } 1579 1580 if (mod->len == 0) { /* Listen mode */ 1581 cmd_code = PN533_CMD_TG_INIT_AS_TARGET; 1582 skb = pn533_alloc_poll_tg_frame(dev); 1583 } else { /* Polling mode */ 1584 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET; 1585 skb = pn533_alloc_poll_in_frame(dev, mod); 1586 } 1587 1588 if (!skb) { 1589 nfc_err(dev->dev, "Failed to allocate skb\n"); 1590 return -ENOMEM; 1591 } 1592 1593 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete, 1594 NULL); 1595 if (rc < 0) { 1596 dev_kfree_skb(skb); 1597 nfc_err(dev->dev, "Polling loop error %d\n", rc); 1598 } 1599 1600 return rc; 1601} 1602 1603static void pn533_wq_poll(struct work_struct *work) 1604{ 1605 struct pn533 *dev = container_of(work, struct pn533, poll_work.work); 1606 struct pn533_poll_modulations *cur_mod; 1607 int rc; 1608 1609 cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; 1610 1611 dev_dbg(dev->dev, 1612 "%s cancel_listen %d modulation len %d\n", 1613 __func__, dev->cancel_listen, cur_mod->len); 1614 1615 if (dev->cancel_listen == 1) { 1616 dev->cancel_listen = 0; 1617 dev->phy_ops->abort_cmd(dev, GFP_ATOMIC); 1618 } 1619 1620 rc = pn533_send_poll_frame(dev); 1621 if (rc) 1622 return; 1623 1624 if (cur_mod->len == 0 && dev->poll_mod_count > 1) 1625 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ); 1626} 1627 1628static int pn533_start_poll(struct nfc_dev *nfc_dev, 1629 u32 im_protocols, u32 tm_protocols) 1630{ 1631 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1632 struct pn533_poll_modulations *cur_mod; 1633 struct sk_buff *skb; 1634 u8 rand_mod; 1635 int rc; 1636 1637 dev_dbg(dev->dev, 1638 "%s: im protocols 0x%x tm protocols 0x%x\n", 1639 __func__, im_protocols, tm_protocols); 1640 1641 if (dev->tgt_active_prot) { 1642 nfc_err(dev->dev, 1643 "Cannot poll with a target already activated\n"); 1644 return -EBUSY; 1645 } 1646 1647 if (dev->tgt_mode) { 1648 nfc_err(dev->dev, 1649 "Cannot poll while already being activated\n"); 1650 return -EBUSY; 1651 } 1652 1653 if (tm_protocols) { 1654 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len); 1655 if (dev->gb == NULL) 1656 tm_protocols = 0; 1657 } 1658 1659 dev->poll_protocols = im_protocols; 1660 dev->listen_protocols = tm_protocols; 1661 if (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL) { 1662 skb = pn533_alloc_skb(dev, 4 + 6); 1663 if (!skb) 1664 return -ENOMEM; 1665 1666 *((u8 *)skb_put(skb, sizeof(u8))) = 1667 PN532_AUTOPOLL_POLLNR_INFINITE; 1668 *((u8 *)skb_put(skb, sizeof(u8))) = PN532_AUTOPOLL_PERIOD; 1669 1670 if ((im_protocols & NFC_PROTO_MIFARE_MASK) && 1671 (im_protocols & NFC_PROTO_ISO14443_MASK) && 1672 (im_protocols & NFC_PROTO_NFC_DEP_MASK)) 1673 *((u8 *)skb_put(skb, sizeof(u8))) = 1674 PN532_AUTOPOLL_TYPE_GENERIC_106; 1675 else { 1676 if (im_protocols & NFC_PROTO_MIFARE_MASK) 1677 *((u8 *)skb_put(skb, sizeof(u8))) = 1678 PN532_AUTOPOLL_TYPE_MIFARE; 1679 1680 if (im_protocols & NFC_PROTO_ISO14443_MASK) 1681 *((u8 *)skb_put(skb, sizeof(u8))) = 1682 PN532_AUTOPOLL_TYPE_ISOA; 1683 1684 if (im_protocols & NFC_PROTO_NFC_DEP_MASK) { 1685 *((u8 *)skb_put(skb, sizeof(u8))) = 1686 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106; 1687 *((u8 *)skb_put(skb, sizeof(u8))) = 1688 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212; 1689 *((u8 *)skb_put(skb, sizeof(u8))) = 1690 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424; 1691 } 1692 } 1693 1694 if (im_protocols & NFC_PROTO_FELICA_MASK || 1695 im_protocols & NFC_PROTO_NFC_DEP_MASK) { 1696 *((u8 *)skb_put(skb, sizeof(u8))) = 1697 PN532_AUTOPOLL_TYPE_FELICA212; 1698 *((u8 *)skb_put(skb, sizeof(u8))) = 1699 PN532_AUTOPOLL_TYPE_FELICA424; 1700 } 1701 1702 if (im_protocols & NFC_PROTO_JEWEL_MASK) 1703 *((u8 *)skb_put(skb, sizeof(u8))) = 1704 PN532_AUTOPOLL_TYPE_JEWEL; 1705 1706 if (im_protocols & NFC_PROTO_ISO14443_B_MASK) 1707 *((u8 *)skb_put(skb, sizeof(u8))) = 1708 PN532_AUTOPOLL_TYPE_ISOB; 1709 1710 if (tm_protocols) 1711 *((u8 *)skb_put(skb, sizeof(u8))) = 1712 PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106; 1713 1714 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_AUTOPOLL, skb, 1715 pn533_autopoll_complete, NULL); 1716 1717 if (rc < 0) 1718 dev_kfree_skb(skb); 1719 else 1720 dev->poll_mod_count++; 1721 1722 return rc; 1723 } 1724 1725 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols); 1726 1727 /* Do not always start polling from the same modulation */ 1728 get_random_bytes(&rand_mod, sizeof(rand_mod)); 1729 rand_mod %= dev->poll_mod_count; 1730 dev->poll_mod_curr = rand_mod; 1731 1732 cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; 1733 1734 rc = pn533_send_poll_frame(dev); 1735 1736 /* Start listen timer */ 1737 if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1) 1738 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ); 1739 1740 return rc; 1741} 1742 1743static void pn533_stop_poll(struct nfc_dev *nfc_dev) 1744{ 1745 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1746 1747 del_timer(&dev->listen_timer); 1748 1749 if (!dev->poll_mod_count) { 1750 dev_dbg(dev->dev, 1751 "Polling operation was not running\n"); 1752 return; 1753 } 1754 1755 dev->phy_ops->abort_cmd(dev, GFP_KERNEL); 1756 flush_delayed_work(&dev->poll_work); 1757 pn533_poll_reset_mod_list(dev); 1758} 1759 1760static int pn533_activate_target_nfcdep(struct pn533 *dev) 1761{ 1762 struct pn533_cmd_activate_response *rsp; 1763 u16 gt_len; 1764 int rc; 1765 struct sk_buff *skb; 1766 struct sk_buff *resp; 1767 1768 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/ 1769 if (!skb) 1770 return -ENOMEM; 1771 1772 skb_put_u8(skb, 1); /* TG */ 1773 skb_put_u8(skb, 0); /* Next */ 1774 1775 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb); 1776 if (IS_ERR(resp)) 1777 return PTR_ERR(resp); 1778 1779 rsp = (struct pn533_cmd_activate_response *)resp->data; 1780 rc = rsp->status & PN533_CMD_RET_MASK; 1781 if (rc != PN533_CMD_RET_SUCCESS) { 1782 nfc_err(dev->dev, 1783 "Target activation failed (error 0x%x)\n", rc); 1784 dev_kfree_skb(resp); 1785 return -EIO; 1786 } 1787 1788 /* ATR_RES general bytes are located at offset 16 */ 1789 gt_len = resp->len - 16; 1790 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len); 1791 1792 dev_kfree_skb(resp); 1793 return rc; 1794} 1795 1796static int pn533_activate_target(struct nfc_dev *nfc_dev, 1797 struct nfc_target *target, u32 protocol) 1798{ 1799 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1800 int rc; 1801 1802 dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol); 1803 1804 if (dev->poll_mod_count) { 1805 nfc_err(dev->dev, 1806 "Cannot activate while polling\n"); 1807 return -EBUSY; 1808 } 1809 1810 if (dev->tgt_active_prot) { 1811 nfc_err(dev->dev, 1812 "There is already an active target\n"); 1813 return -EBUSY; 1814 } 1815 1816 if (!dev->tgt_available_prots) { 1817 nfc_err(dev->dev, 1818 "There is no available target to activate\n"); 1819 return -EINVAL; 1820 } 1821 1822 if (!(dev->tgt_available_prots & (1 << protocol))) { 1823 nfc_err(dev->dev, 1824 "Target doesn't support requested proto %u\n", 1825 protocol); 1826 return -EINVAL; 1827 } 1828 1829 if (protocol == NFC_PROTO_NFC_DEP) { 1830 rc = pn533_activate_target_nfcdep(dev); 1831 if (rc) { 1832 nfc_err(dev->dev, 1833 "Activating target with DEP failed %d\n", rc); 1834 return rc; 1835 } 1836 } 1837 1838 dev->tgt_active_prot = protocol; 1839 dev->tgt_available_prots = 0; 1840 1841 return 0; 1842} 1843 1844static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg, 1845 struct sk_buff *resp) 1846{ 1847 int rc = 0; 1848 1849 if (IS_ERR(resp)) { 1850 rc = PTR_ERR(resp); 1851 1852 nfc_err(dev->dev, "Target release error %d\n", rc); 1853 1854 return rc; 1855 } 1856 1857 rc = resp->data[0] & PN533_CMD_RET_MASK; 1858 if (rc != PN533_CMD_RET_SUCCESS) 1859 nfc_err(dev->dev, 1860 "Error 0x%x when releasing the target\n", rc); 1861 1862 dev_kfree_skb(resp); 1863 return rc; 1864} 1865 1866static void pn533_deactivate_target(struct nfc_dev *nfc_dev, 1867 struct nfc_target *target, u8 mode) 1868{ 1869 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1870 struct sk_buff *skb; 1871 int rc; 1872 1873 if (!dev->tgt_active_prot) { 1874 nfc_err(dev->dev, "There is no active target\n"); 1875 return; 1876 } 1877 1878 dev->tgt_active_prot = 0; 1879 skb_queue_purge(&dev->resp_q); 1880 1881 skb = pn533_alloc_skb(dev, sizeof(u8)); 1882 if (!skb) 1883 return; 1884 1885 skb_put_u8(skb, 1); /* TG*/ 1886 1887 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb, 1888 pn533_deactivate_target_complete, NULL); 1889 if (rc < 0) { 1890 dev_kfree_skb(skb); 1891 nfc_err(dev->dev, "Target release error %d\n", rc); 1892 } 1893} 1894 1895 1896static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg, 1897 struct sk_buff *resp) 1898{ 1899 struct pn533_cmd_jump_dep_response *rsp; 1900 u8 target_gt_len; 1901 int rc; 1902 u8 active = *(u8 *)arg; 1903 1904 kfree(arg); 1905 1906 if (IS_ERR(resp)) 1907 return PTR_ERR(resp); 1908 1909 if (dev->tgt_available_prots && 1910 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) { 1911 nfc_err(dev->dev, 1912 "The target does not support DEP\n"); 1913 rc = -EINVAL; 1914 goto error; 1915 } 1916 1917 rsp = (struct pn533_cmd_jump_dep_response *)resp->data; 1918 1919 rc = rsp->status & PN533_CMD_RET_MASK; 1920 if (rc != PN533_CMD_RET_SUCCESS) { 1921 nfc_err(dev->dev, 1922 "Bringing DEP link up failed (error 0x%x)\n", rc); 1923 goto error; 1924 } 1925 1926 if (!dev->tgt_available_prots) { 1927 struct nfc_target nfc_target; 1928 1929 dev_dbg(dev->dev, "Creating new target\n"); 1930 1931 memset(&nfc_target, 0, sizeof(struct nfc_target)); 1932 1933 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK; 1934 nfc_target.nfcid1_len = 10; 1935 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len); 1936 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1); 1937 if (rc) 1938 goto error; 1939 1940 dev->tgt_available_prots = 0; 1941 } 1942 1943 dev->tgt_active_prot = NFC_PROTO_NFC_DEP; 1944 1945 /* ATR_RES general bytes are located at offset 17 */ 1946 target_gt_len = resp->len - 17; 1947 rc = nfc_set_remote_general_bytes(dev->nfc_dev, 1948 rsp->gt, target_gt_len); 1949 if (rc == 0) 1950 rc = nfc_dep_link_is_up(dev->nfc_dev, 1951 dev->nfc_dev->targets[0].idx, 1952 !active, NFC_RF_INITIATOR); 1953 1954error: 1955 dev_kfree_skb(resp); 1956 return rc; 1957} 1958 1959static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf); 1960static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, 1961 u8 comm_mode, u8 *gb, size_t gb_len) 1962{ 1963 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1964 struct sk_buff *skb; 1965 int rc, skb_len; 1966 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE]; 1967 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3}; 1968 1969 if (dev->poll_mod_count) { 1970 nfc_err(dev->dev, 1971 "Cannot bring the DEP link up while polling\n"); 1972 return -EBUSY; 1973 } 1974 1975 if (dev->tgt_active_prot) { 1976 nfc_err(dev->dev, 1977 "There is already an active target\n"); 1978 return -EBUSY; 1979 } 1980 1981 skb_len = 3 + gb_len; /* ActPass + BR + Next */ 1982 skb_len += PASSIVE_DATA_LEN; 1983 1984 /* NFCID3 */ 1985 skb_len += NFC_NFCID3_MAXSIZE; 1986 if (target && !target->nfcid2_len) { 1987 nfcid3[0] = 0x1; 1988 nfcid3[1] = 0xfe; 1989 get_random_bytes(nfcid3 + 2, 6); 1990 } 1991 1992 skb = pn533_alloc_skb(dev, skb_len); 1993 if (!skb) 1994 return -ENOMEM; 1995 1996 skb_put_u8(skb, !comm_mode); /* ActPass */ 1997 skb_put_u8(skb, 0x02); /* 424 kbps */ 1998 1999 next = skb_put(skb, 1); /* Next */ 2000 *next = 0; 2001 2002 /* Copy passive data */ 2003 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN); 2004 *next |= 1; 2005 2006 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */ 2007 if (target && target->nfcid2_len) 2008 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2, 2009 target->nfcid2_len); 2010 else 2011 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE); 2012 *next |= 2; 2013 2014 if (gb != NULL && gb_len > 0) { 2015 skb_put_data(skb, gb, gb_len); 2016 *next |= 4; /* We have some Gi */ 2017 } else { 2018 *next = 0; 2019 } 2020 2021 arg = kmalloc(sizeof(*arg), GFP_KERNEL); 2022 if (!arg) { 2023 dev_kfree_skb(skb); 2024 return -ENOMEM; 2025 } 2026 2027 *arg = !comm_mode; 2028 2029 pn533_rf_field(dev->nfc_dev, 0); 2030 2031 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb, 2032 pn533_in_dep_link_up_complete, arg); 2033 2034 if (rc < 0) { 2035 dev_kfree_skb(skb); 2036 kfree(arg); 2037 } 2038 2039 return rc; 2040} 2041 2042static int pn533_dep_link_down(struct nfc_dev *nfc_dev) 2043{ 2044 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2045 2046 pn533_poll_reset_mod_list(dev); 2047 2048 if (dev->tgt_mode || dev->tgt_active_prot) 2049 dev->phy_ops->abort_cmd(dev, GFP_KERNEL); 2050 2051 dev->tgt_active_prot = 0; 2052 dev->tgt_mode = 0; 2053 2054 skb_queue_purge(&dev->resp_q); 2055 2056 return 0; 2057} 2058 2059struct pn533_data_exchange_arg { 2060 data_exchange_cb_t cb; 2061 void *cb_context; 2062}; 2063 2064static struct sk_buff *pn533_build_response(struct pn533 *dev) 2065{ 2066 struct sk_buff *skb, *tmp, *t; 2067 unsigned int skb_len = 0, tmp_len = 0; 2068 2069 if (skb_queue_empty(&dev->resp_q)) 2070 return NULL; 2071 2072 if (skb_queue_len(&dev->resp_q) == 1) { 2073 skb = skb_dequeue(&dev->resp_q); 2074 goto out; 2075 } 2076 2077 skb_queue_walk_safe(&dev->resp_q, tmp, t) 2078 skb_len += tmp->len; 2079 2080 dev_dbg(dev->dev, "%s total length %d\n", 2081 __func__, skb_len); 2082 2083 skb = alloc_skb(skb_len, GFP_KERNEL); 2084 if (skb == NULL) 2085 goto out; 2086 2087 skb_put(skb, skb_len); 2088 2089 skb_queue_walk_safe(&dev->resp_q, tmp, t) { 2090 memcpy(skb->data + tmp_len, tmp->data, tmp->len); 2091 tmp_len += tmp->len; 2092 } 2093 2094out: 2095 skb_queue_purge(&dev->resp_q); 2096 2097 return skb; 2098} 2099 2100static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg, 2101 struct sk_buff *resp) 2102{ 2103 struct pn533_data_exchange_arg *arg = _arg; 2104 struct sk_buff *skb; 2105 int rc = 0; 2106 u8 status, ret, mi; 2107 2108 if (IS_ERR(resp)) { 2109 rc = PTR_ERR(resp); 2110 goto _error; 2111 } 2112 2113 status = resp->data[0]; 2114 ret = status & PN533_CMD_RET_MASK; 2115 mi = status & PN533_CMD_MI_MASK; 2116 2117 skb_pull(resp, sizeof(status)); 2118 2119 if (ret != PN533_CMD_RET_SUCCESS) { 2120 nfc_err(dev->dev, 2121 "Exchanging data failed (error 0x%x)\n", ret); 2122 rc = -EIO; 2123 goto error; 2124 } 2125 2126 skb_queue_tail(&dev->resp_q, resp); 2127 2128 if (mi) { 2129 dev->cmd_complete_mi_arg = arg; 2130 queue_work(dev->wq, &dev->mi_rx_work); 2131 return -EINPROGRESS; 2132 } 2133 2134 /* Prepare for the next round */ 2135 if (skb_queue_len(&dev->fragment_skb) > 0) { 2136 dev->cmd_complete_dep_arg = arg; 2137 queue_work(dev->wq, &dev->mi_tx_work); 2138 2139 return -EINPROGRESS; 2140 } 2141 2142 skb = pn533_build_response(dev); 2143 if (!skb) { 2144 rc = -ENOMEM; 2145 goto error; 2146 } 2147 2148 arg->cb(arg->cb_context, skb, 0); 2149 kfree(arg); 2150 return 0; 2151 2152error: 2153 dev_kfree_skb(resp); 2154_error: 2155 skb_queue_purge(&dev->resp_q); 2156 arg->cb(arg->cb_context, NULL, rc); 2157 kfree(arg); 2158 return rc; 2159} 2160 2161/* 2162 * Receive an incoming pn533 frame. skb contains only header and payload. 2163 * If skb == NULL, it is a notification that the link below is dead. 2164 */ 2165void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status) 2166{ 2167 if (!dev->cmd) 2168 goto sched_wq; 2169 2170 dev->cmd->status = status; 2171 2172 if (status != 0) { 2173 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status); 2174 goto sched_wq; 2175 } 2176 2177 if (skb == NULL) { 2178 dev_err(dev->dev, "NULL Frame -> link is dead\n"); 2179 goto sched_wq; 2180 } 2181 2182 if (pn533_rx_frame_is_ack(skb->data)) { 2183 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__); 2184 dev_kfree_skb(skb); 2185 return; 2186 } 2187 2188 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data, 2189 dev->ops->rx_frame_size(skb->data), false); 2190 2191 if (!dev->ops->rx_is_frame_valid(skb->data, dev)) { 2192 nfc_err(dev->dev, "Received an invalid frame\n"); 2193 dev->cmd->status = -EIO; 2194 } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) { 2195 nfc_err(dev->dev, "It it not the response to the last command\n"); 2196 dev->cmd->status = -EIO; 2197 } 2198 2199 dev->cmd->resp = skb; 2200 2201sched_wq: 2202 queue_work(dev->wq, &dev->cmd_complete_work); 2203} 2204EXPORT_SYMBOL(pn533_recv_frame); 2205 2206/* Split the Tx skb into small chunks */ 2207static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb) 2208{ 2209 struct sk_buff *frag; 2210 int frag_size; 2211 2212 do { 2213 /* Remaining size */ 2214 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN) 2215 frag_size = PN533_CMD_DATAFRAME_MAXLEN; 2216 else 2217 frag_size = skb->len; 2218 2219 /* Allocate and reserve */ 2220 frag = pn533_alloc_skb(dev, frag_size); 2221 if (!frag) { 2222 skb_queue_purge(&dev->fragment_skb); 2223 return -ENOMEM; 2224 } 2225 2226 if (!dev->tgt_mode) { 2227 /* Reserve the TG/MI byte */ 2228 skb_reserve(frag, 1); 2229 2230 /* MI + TG */ 2231 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN) 2232 *(u8 *)skb_push(frag, sizeof(u8)) = 2233 (PN533_CMD_MI_MASK | 1); 2234 else 2235 *(u8 *)skb_push(frag, sizeof(u8)) = 1; /* TG */ 2236 } 2237 2238 skb_put_data(frag, skb->data, frag_size); 2239 2240 /* Reduce the size of incoming buffer */ 2241 skb_pull(skb, frag_size); 2242 2243 /* Add this to skb_queue */ 2244 skb_queue_tail(&dev->fragment_skb, frag); 2245 2246 } while (skb->len > 0); 2247 2248 dev_kfree_skb(skb); 2249 2250 return skb_queue_len(&dev->fragment_skb); 2251} 2252 2253static int pn533_transceive(struct nfc_dev *nfc_dev, 2254 struct nfc_target *target, struct sk_buff *skb, 2255 data_exchange_cb_t cb, void *cb_context) 2256{ 2257 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2258 struct pn533_data_exchange_arg *arg = NULL; 2259 int rc; 2260 2261 if (!dev->tgt_active_prot) { 2262 nfc_err(dev->dev, 2263 "Can't exchange data if there is no active target\n"); 2264 rc = -EINVAL; 2265 goto error; 2266 } 2267 2268 arg = kmalloc(sizeof(*arg), GFP_KERNEL); 2269 if (!arg) { 2270 rc = -ENOMEM; 2271 goto error; 2272 } 2273 2274 arg->cb = cb; 2275 arg->cb_context = cb_context; 2276 2277 switch (dev->device_type) { 2278 case PN533_DEVICE_PASORI: 2279 if (dev->tgt_active_prot == NFC_PROTO_FELICA) { 2280 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU, 2281 skb, 2282 pn533_data_exchange_complete, 2283 arg); 2284 2285 break; 2286 } 2287 fallthrough; 2288 default: 2289 /* jumbo frame ? */ 2290 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { 2291 rc = pn533_fill_fragment_skbs(dev, skb); 2292 if (rc < 0) 2293 goto error; 2294 2295 skb = skb_dequeue(&dev->fragment_skb); 2296 if (!skb) { 2297 rc = -EIO; 2298 goto error; 2299 } 2300 } else { 2301 *(u8 *)skb_push(skb, sizeof(u8)) = 1; /* TG */ 2302 } 2303 2304 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE, 2305 skb, pn533_data_exchange_complete, 2306 arg); 2307 2308 break; 2309 } 2310 2311 if (rc < 0) /* rc from send_async */ 2312 goto error; 2313 2314 return 0; 2315 2316error: 2317 kfree(arg); 2318 dev_kfree_skb(skb); 2319 return rc; 2320} 2321 2322static int pn533_tm_send_complete(struct pn533 *dev, void *arg, 2323 struct sk_buff *resp) 2324{ 2325 u8 status; 2326 2327 if (IS_ERR(resp)) 2328 return PTR_ERR(resp); 2329 2330 status = resp->data[0]; 2331 2332 /* Prepare for the next round */ 2333 if (skb_queue_len(&dev->fragment_skb) > 0) { 2334 queue_work(dev->wq, &dev->mi_tm_tx_work); 2335 return -EINPROGRESS; 2336 } 2337 dev_kfree_skb(resp); 2338 2339 if (status != 0) { 2340 nfc_tm_deactivated(dev->nfc_dev); 2341 2342 dev->tgt_mode = 0; 2343 2344 return 0; 2345 } 2346 2347 queue_work(dev->wq, &dev->tg_work); 2348 2349 return 0; 2350} 2351 2352static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) 2353{ 2354 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2355 int rc; 2356 2357 /* let's split in multiple chunks if size's too big */ 2358 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { 2359 rc = pn533_fill_fragment_skbs(dev, skb); 2360 if (rc < 0) 2361 goto error; 2362 2363 /* get the first skb */ 2364 skb = skb_dequeue(&dev->fragment_skb); 2365 if (!skb) { 2366 rc = -EIO; 2367 goto error; 2368 } 2369 2370 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb, 2371 pn533_tm_send_complete, NULL); 2372 } else { 2373 /* Send th skb */ 2374 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb, 2375 pn533_tm_send_complete, NULL); 2376 } 2377 2378error: 2379 if (rc < 0) { 2380 dev_kfree_skb(skb); 2381 skb_queue_purge(&dev->fragment_skb); 2382 } 2383 2384 return rc; 2385} 2386 2387static void pn533_wq_mi_recv(struct work_struct *work) 2388{ 2389 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work); 2390 struct sk_buff *skb; 2391 int rc; 2392 2393 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN); 2394 if (!skb) 2395 goto error; 2396 2397 switch (dev->device_type) { 2398 case PN533_DEVICE_PASORI: 2399 if (dev->tgt_active_prot == NFC_PROTO_FELICA) { 2400 rc = pn533_send_cmd_direct_async(dev, 2401 PN533_CMD_IN_COMM_THRU, 2402 skb, 2403 pn533_data_exchange_complete, 2404 dev->cmd_complete_mi_arg); 2405 2406 break; 2407 } 2408 fallthrough; 2409 default: 2410 skb_put_u8(skb, 1); /*TG*/ 2411 2412 rc = pn533_send_cmd_direct_async(dev, 2413 PN533_CMD_IN_DATA_EXCHANGE, 2414 skb, 2415 pn533_data_exchange_complete, 2416 dev->cmd_complete_mi_arg); 2417 2418 break; 2419 } 2420 2421 if (rc == 0) /* success */ 2422 return; 2423 2424 nfc_err(dev->dev, 2425 "Error %d when trying to perform data_exchange\n", rc); 2426 2427 dev_kfree_skb(skb); 2428 kfree(dev->cmd_complete_mi_arg); 2429 2430error: 2431 dev->phy_ops->send_ack(dev, GFP_KERNEL); 2432 queue_work(dev->wq, &dev->cmd_work); 2433} 2434 2435static void pn533_wq_mi_send(struct work_struct *work) 2436{ 2437 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work); 2438 struct sk_buff *skb; 2439 int rc; 2440 2441 /* Grab the first skb in the queue */ 2442 skb = skb_dequeue(&dev->fragment_skb); 2443 2444 if (skb == NULL) { /* No more data */ 2445 /* Reset the queue for future use */ 2446 skb_queue_head_init(&dev->fragment_skb); 2447 goto error; 2448 } 2449 2450 switch (dev->device_type) { 2451 case PN533_DEVICE_PASORI: 2452 if (dev->tgt_active_prot != NFC_PROTO_FELICA) { 2453 rc = -EIO; 2454 break; 2455 } 2456 2457 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU, 2458 skb, 2459 pn533_data_exchange_complete, 2460 dev->cmd_complete_dep_arg); 2461 2462 break; 2463 2464 default: 2465 /* Still some fragments? */ 2466 rc = pn533_send_cmd_direct_async(dev, 2467 PN533_CMD_IN_DATA_EXCHANGE, 2468 skb, 2469 pn533_data_exchange_complete, 2470 dev->cmd_complete_dep_arg); 2471 2472 break; 2473 } 2474 2475 if (rc == 0) /* success */ 2476 return; 2477 2478 nfc_err(dev->dev, 2479 "Error %d when trying to perform data_exchange\n", rc); 2480 2481 dev_kfree_skb(skb); 2482 kfree(dev->cmd_complete_dep_arg); 2483 2484error: 2485 dev->phy_ops->send_ack(dev, GFP_KERNEL); 2486 queue_work(dev->wq, &dev->cmd_work); 2487} 2488 2489static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata, 2490 u8 cfgdata_len) 2491{ 2492 struct sk_buff *skb; 2493 struct sk_buff *resp; 2494 int skb_len; 2495 2496 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */ 2497 2498 skb = pn533_alloc_skb(dev, skb_len); 2499 if (!skb) 2500 return -ENOMEM; 2501 2502 skb_put_u8(skb, cfgitem); 2503 skb_put_data(skb, cfgdata, cfgdata_len); 2504 2505 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb); 2506 if (IS_ERR(resp)) 2507 return PTR_ERR(resp); 2508 2509 dev_kfree_skb(resp); 2510 return 0; 2511} 2512 2513static int pn533_get_firmware_version(struct pn533 *dev, 2514 struct pn533_fw_version *fv) 2515{ 2516 struct sk_buff *skb; 2517 struct sk_buff *resp; 2518 2519 skb = pn533_alloc_skb(dev, 0); 2520 if (!skb) 2521 return -ENOMEM; 2522 2523 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb); 2524 if (IS_ERR(resp)) 2525 return PTR_ERR(resp); 2526 2527 fv->ic = resp->data[0]; 2528 fv->ver = resp->data[1]; 2529 fv->rev = resp->data[2]; 2530 fv->support = resp->data[3]; 2531 2532 dev_kfree_skb(resp); 2533 return 0; 2534} 2535 2536static int pn533_pasori_fw_reset(struct pn533 *dev) 2537{ 2538 struct sk_buff *skb; 2539 struct sk_buff *resp; 2540 2541 skb = pn533_alloc_skb(dev, sizeof(u8)); 2542 if (!skb) 2543 return -ENOMEM; 2544 2545 skb_put_u8(skb, 0x1); 2546 2547 resp = pn533_send_cmd_sync(dev, 0x18, skb); 2548 if (IS_ERR(resp)) 2549 return PTR_ERR(resp); 2550 2551 dev_kfree_skb(resp); 2552 2553 return 0; 2554} 2555 2556static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf) 2557{ 2558 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2559 u8 rf_field = !!rf; 2560 int rc; 2561 2562 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA; 2563 2564 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD, 2565 (u8 *)&rf_field, 1); 2566 if (rc) { 2567 nfc_err(dev->dev, "Error on setting RF field\n"); 2568 return rc; 2569 } 2570 2571 return 0; 2572} 2573 2574static int pn532_sam_configuration(struct nfc_dev *nfc_dev) 2575{ 2576 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2577 struct sk_buff *skb; 2578 struct sk_buff *resp; 2579 2580 skb = pn533_alloc_skb(dev, 1); 2581 if (!skb) 2582 return -ENOMEM; 2583 2584 skb_put_u8(skb, 0x01); 2585 2586 resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb); 2587 if (IS_ERR(resp)) 2588 return PTR_ERR(resp); 2589 2590 dev_kfree_skb(resp); 2591 return 0; 2592} 2593 2594static int pn533_dev_up(struct nfc_dev *nfc_dev) 2595{ 2596 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2597 int rc; 2598 2599 if (dev->phy_ops->dev_up) { 2600 rc = dev->phy_ops->dev_up(dev); 2601 if (rc) 2602 return rc; 2603 } 2604 2605 if ((dev->device_type == PN533_DEVICE_PN532) || 2606 (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) { 2607 rc = pn532_sam_configuration(nfc_dev); 2608 2609 if (rc) 2610 return rc; 2611 } 2612 2613 return pn533_rf_field(nfc_dev, 1); 2614} 2615 2616static int pn533_dev_down(struct nfc_dev *nfc_dev) 2617{ 2618 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2619 int ret; 2620 2621 ret = pn533_rf_field(nfc_dev, 0); 2622 if (dev->phy_ops->dev_down && !ret) 2623 ret = dev->phy_ops->dev_down(dev); 2624 2625 return ret; 2626} 2627 2628static const struct nfc_ops pn533_nfc_ops = { 2629 .dev_up = pn533_dev_up, 2630 .dev_down = pn533_dev_down, 2631 .dep_link_up = pn533_dep_link_up, 2632 .dep_link_down = pn533_dep_link_down, 2633 .start_poll = pn533_start_poll, 2634 .stop_poll = pn533_stop_poll, 2635 .activate_target = pn533_activate_target, 2636 .deactivate_target = pn533_deactivate_target, 2637 .im_transceive = pn533_transceive, 2638 .tm_send = pn533_tm_send, 2639}; 2640 2641static int pn533_setup(struct pn533 *dev) 2642{ 2643 struct pn533_config_max_retries max_retries; 2644 struct pn533_config_timing timing; 2645 u8 pasori_cfg[3] = {0x08, 0x01, 0x08}; 2646 int rc; 2647 2648 switch (dev->device_type) { 2649 case PN533_DEVICE_STD: 2650 case PN533_DEVICE_PASORI: 2651 case PN533_DEVICE_ACR122U: 2652 case PN533_DEVICE_PN532: 2653 case PN533_DEVICE_PN532_AUTOPOLL: 2654 max_retries.mx_rty_atr = 0x2; 2655 max_retries.mx_rty_psl = 0x1; 2656 max_retries.mx_rty_passive_act = 2657 PN533_CONFIG_MAX_RETRIES_NO_RETRY; 2658 2659 timing.rfu = PN533_CONFIG_TIMING_102; 2660 timing.atr_res_timeout = PN533_CONFIG_TIMING_102; 2661 timing.dep_timeout = PN533_CONFIG_TIMING_204; 2662 2663 break; 2664 2665 default: 2666 nfc_err(dev->dev, "Unknown device type %d\n", 2667 dev->device_type); 2668 return -EINVAL; 2669 } 2670 2671 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES, 2672 (u8 *)&max_retries, sizeof(max_retries)); 2673 if (rc) { 2674 nfc_err(dev->dev, 2675 "Error on setting MAX_RETRIES config\n"); 2676 return rc; 2677 } 2678 2679 2680 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING, 2681 (u8 *)&timing, sizeof(timing)); 2682 if (rc) { 2683 nfc_err(dev->dev, "Error on setting RF timings\n"); 2684 return rc; 2685 } 2686 2687 switch (dev->device_type) { 2688 case PN533_DEVICE_STD: 2689 case PN533_DEVICE_PN532: 2690 case PN533_DEVICE_PN532_AUTOPOLL: 2691 break; 2692 2693 case PN533_DEVICE_PASORI: 2694 pn533_pasori_fw_reset(dev); 2695 2696 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI, 2697 pasori_cfg, 3); 2698 if (rc) { 2699 nfc_err(dev->dev, 2700 "Error while settings PASORI config\n"); 2701 return rc; 2702 } 2703 2704 pn533_pasori_fw_reset(dev); 2705 2706 break; 2707 } 2708 2709 return 0; 2710} 2711 2712int pn533_finalize_setup(struct pn533 *dev) 2713{ 2714 2715 struct pn533_fw_version fw_ver; 2716 int rc; 2717 2718 memset(&fw_ver, 0, sizeof(fw_ver)); 2719 2720 rc = pn533_get_firmware_version(dev, &fw_ver); 2721 if (rc) { 2722 nfc_err(dev->dev, "Unable to get FW version\n"); 2723 return rc; 2724 } 2725 2726 nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n", 2727 fw_ver.ic, fw_ver.ver, fw_ver.rev); 2728 2729 rc = pn533_setup(dev); 2730 if (rc) 2731 return rc; 2732 2733 return 0; 2734} 2735EXPORT_SYMBOL_GPL(pn533_finalize_setup); 2736 2737struct pn533 *pn53x_common_init(u32 device_type, 2738 enum pn533_protocol_type protocol_type, 2739 void *phy, 2740 const struct pn533_phy_ops *phy_ops, 2741 struct pn533_frame_ops *fops, 2742 struct device *dev) 2743{ 2744 struct pn533 *priv; 2745 2746 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 2747 if (!priv) 2748 return ERR_PTR(-ENOMEM); 2749 2750 priv->phy = phy; 2751 priv->phy_ops = phy_ops; 2752 priv->dev = dev; 2753 if (fops != NULL) 2754 priv->ops = fops; 2755 else 2756 priv->ops = &pn533_std_frame_ops; 2757 2758 priv->protocol_type = protocol_type; 2759 priv->device_type = device_type; 2760 2761 mutex_init(&priv->cmd_lock); 2762 2763 INIT_WORK(&priv->cmd_work, pn533_wq_cmd); 2764 INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete); 2765 INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv); 2766 INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send); 2767 INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data); 2768 INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv); 2769 INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send); 2770 INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll); 2771 INIT_WORK(&priv->rf_work, pn533_wq_rf); 2772 priv->wq = alloc_ordered_workqueue("pn533", 0); 2773 if (priv->wq == NULL) 2774 goto error; 2775 2776 timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0); 2777 2778 skb_queue_head_init(&priv->resp_q); 2779 skb_queue_head_init(&priv->fragment_skb); 2780 2781 INIT_LIST_HEAD(&priv->cmd_queue); 2782 return priv; 2783 2784error: 2785 kfree(priv); 2786 return ERR_PTR(-ENOMEM); 2787} 2788EXPORT_SYMBOL_GPL(pn53x_common_init); 2789 2790void pn53x_common_clean(struct pn533 *priv) 2791{ 2792 struct pn533_cmd *cmd, *n; 2793 2794 /* delete the timer before cleanup the worker */ 2795 timer_shutdown_sync(&priv->listen_timer); 2796 2797 flush_delayed_work(&priv->poll_work); 2798 destroy_workqueue(priv->wq); 2799 2800 skb_queue_purge(&priv->resp_q); 2801 2802 list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) { 2803 list_del(&cmd->queue); 2804 kfree(cmd); 2805 } 2806 2807 kfree(priv); 2808} 2809EXPORT_SYMBOL_GPL(pn53x_common_clean); 2810 2811int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols, 2812 struct device *parent) 2813{ 2814 priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols, 2815 priv->ops->tx_header_len + 2816 PN533_CMD_DATAEXCH_HEAD_LEN, 2817 priv->ops->tx_tail_len); 2818 if (!priv->nfc_dev) 2819 return -ENOMEM; 2820 2821 nfc_set_parent_dev(priv->nfc_dev, parent); 2822 nfc_set_drvdata(priv->nfc_dev, priv); 2823 return 0; 2824} 2825EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc); 2826 2827int pn53x_register_nfc(struct pn533 *priv, u32 protocols, 2828 struct device *parent) 2829{ 2830 int rc; 2831 2832 rc = pn532_i2c_nfc_alloc(priv, protocols, parent); 2833 if (rc) 2834 return rc; 2835 2836 rc = nfc_register_device(priv->nfc_dev); 2837 if (rc) 2838 nfc_free_device(priv->nfc_dev); 2839 2840 return rc; 2841} 2842EXPORT_SYMBOL_GPL(pn53x_register_nfc); 2843 2844void pn53x_unregister_nfc(struct pn533 *priv) 2845{ 2846 nfc_unregister_device(priv->nfc_dev); 2847 nfc_free_device(priv->nfc_dev); 2848} 2849EXPORT_SYMBOL_GPL(pn53x_unregister_nfc); 2850 2851MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>"); 2852MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>"); 2853MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>"); 2854MODULE_DESCRIPTION("PN533 driver ver " VERSION); 2855MODULE_VERSION(VERSION); 2856MODULE_LICENSE("GPL"); 2857