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 */ 28 struct 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 53 struct pn533_config_max_retries { 54 u8 mx_rty_atr; 55 u8 mx_rty_psl; 56 u8 mx_rty_passive_act; 57 } __packed; 58 59 struct 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 81 union 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 94 struct 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 }; 102 103 static 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 */ 162 163 struct 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; 174 175 struct 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; 187 188 struct 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 */ 224 static 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 */ 230 static inline u8 pn533_std_checksum(u8 value) 231 { 232 return ~value + 1; 233 } 234 235 /* The rule: sum(data elements) + checksum = 0 */ 236 static 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 } 246 247 static 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 } 257 258 static 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 } 269 270 static 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 } 276 277 static 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 } 315 316 bool 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 } 328 EXPORT_SYMBOL_GPL(pn533_rx_frame_is_ack); 329 330 static 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 } 345 346 static 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 } 356 357 bool 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 } 362 EXPORT_SYMBOL_GPL(pn533_rx_frame_is_cmd_response); 363 364 365 static 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 }; 380 381 static 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 } 396 397 static 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); 430 431 done: 432 kfree(cmd); 433 dev->cmd = NULL; 434 return rc; 435 } 436 437 static 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; 479 480 error: 481 kfree(cmd); 482 unlock: 483 mutex_unlock(&dev->cmd_lock); 484 return rc; 485 } 486 487 static 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 } 495 496 static 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 */ 513 static 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 } 541 542 static 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 } 551 552 static 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 } 582 583 struct pn533_sync_cmd_response { 584 struct sk_buff *resp; 585 struct completion done; 586 }; 587 588 static 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 */ 616 static 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 } 635 636 static 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 } 649 650 struct 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 3 672 673 static 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 } 706 707 static 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 } 740 741 struct 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 752 753 static 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 } 764 765 static 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 } 789 790 struct pn533_target_jewel { 791 __be16 sens_res; 792 u8 jewelid[4]; 793 } __packed; 794 795 static 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 } 816 817 static 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 } 834 835 struct 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 844 845 struct 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 853 854 struct pn533_target_type_b { 855 struct pn533_type_b_sens_res sensb_res; 856 u8 attrib_res_len; 857 u8 attrib_res[]; 858 } __packed; 859 860 static 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 } 875 876 static 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 } 890 891 static void pn533_poll_reset_mod_list(struct pn533 *dev); 892 static 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 } 946 947 static 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 } 951 952 static void pn533_poll_reset_mod_list(struct pn533 *dev) 953 { 954 dev->poll_mod_count = 0; 955 } 956 957 static 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 } 963 964 static 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 } 989 990 static 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 1015 static 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 1068 static void pn533_wq_tm_mi_recv(struct work_struct *work); 1069 static struct sk_buff *pn533_build_response(struct pn533 *dev); 1070 1071 static 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 1110 error: 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 1119 static 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 1139 static int pn533_tm_send_complete(struct pn533 *dev, void *arg, 1140 struct sk_buff *resp); 1141 static 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 1172 error: 1173 dev->phy_ops->send_ack(dev, GFP_KERNEL); 1174 queue_work(dev->wq, &dev->cmd_work); 1175 } 1176 1177 static 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 1195 static 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 1234 static 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 1246 static 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 1266 static 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 1287 static 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 } 1335 error: 1336 dev_kfree_skb(resp); 1337 return rc; 1338 } 1339 1340 #define PASSIVE_DATA_LEN 5 1341 static 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 1397 static 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 1480 done: 1481 dev_kfree_skb(resp); 1482 return rc; 1483 1484 stop_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 1492 static 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 1537 done: 1538 dev_kfree_skb(resp); 1539 return rc; 1540 1541 stop_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 1549 static 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 1563 static 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 1603 static 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 1628 static 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 if (!dev->poll_mod_count) { 1727 nfc_err(dev->dev, 1728 "Poll mod list is empty\n"); 1729 return -EINVAL; 1730 } 1731 1732 /* Do not always start polling from the same modulation */ 1733 get_random_bytes(&rand_mod, sizeof(rand_mod)); 1734 rand_mod %= dev->poll_mod_count; 1735 dev->poll_mod_curr = rand_mod; 1736 1737 cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; 1738 1739 rc = pn533_send_poll_frame(dev); 1740 1741 /* Start listen timer */ 1742 if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1) 1743 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ); 1744 1745 return rc; 1746 } 1747 1748 static void pn533_stop_poll(struct nfc_dev *nfc_dev) 1749 { 1750 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1751 1752 del_timer(&dev->listen_timer); 1753 1754 if (!dev->poll_mod_count) { 1755 dev_dbg(dev->dev, 1756 "Polling operation was not running\n"); 1757 return; 1758 } 1759 1760 dev->phy_ops->abort_cmd(dev, GFP_KERNEL); 1761 flush_delayed_work(&dev->poll_work); 1762 pn533_poll_reset_mod_list(dev); 1763 } 1764 1765 static int pn533_activate_target_nfcdep(struct pn533 *dev) 1766 { 1767 struct pn533_cmd_activate_response *rsp; 1768 u16 gt_len; 1769 int rc; 1770 struct sk_buff *skb; 1771 struct sk_buff *resp; 1772 1773 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/ 1774 if (!skb) 1775 return -ENOMEM; 1776 1777 skb_put_u8(skb, 1); /* TG */ 1778 skb_put_u8(skb, 0); /* Next */ 1779 1780 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb); 1781 if (IS_ERR(resp)) 1782 return PTR_ERR(resp); 1783 1784 rsp = (struct pn533_cmd_activate_response *)resp->data; 1785 rc = rsp->status & PN533_CMD_RET_MASK; 1786 if (rc != PN533_CMD_RET_SUCCESS) { 1787 nfc_err(dev->dev, 1788 "Target activation failed (error 0x%x)\n", rc); 1789 dev_kfree_skb(resp); 1790 return -EIO; 1791 } 1792 1793 /* ATR_RES general bytes are located at offset 16 */ 1794 gt_len = resp->len - 16; 1795 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len); 1796 1797 dev_kfree_skb(resp); 1798 return rc; 1799 } 1800 1801 static int pn533_activate_target(struct nfc_dev *nfc_dev, 1802 struct nfc_target *target, u32 protocol) 1803 { 1804 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1805 int rc; 1806 1807 dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol); 1808 1809 if (dev->poll_mod_count) { 1810 nfc_err(dev->dev, 1811 "Cannot activate while polling\n"); 1812 return -EBUSY; 1813 } 1814 1815 if (dev->tgt_active_prot) { 1816 nfc_err(dev->dev, 1817 "There is already an active target\n"); 1818 return -EBUSY; 1819 } 1820 1821 if (!dev->tgt_available_prots) { 1822 nfc_err(dev->dev, 1823 "There is no available target to activate\n"); 1824 return -EINVAL; 1825 } 1826 1827 if (!(dev->tgt_available_prots & (1 << protocol))) { 1828 nfc_err(dev->dev, 1829 "Target doesn't support requested proto %u\n", 1830 protocol); 1831 return -EINVAL; 1832 } 1833 1834 if (protocol == NFC_PROTO_NFC_DEP) { 1835 rc = pn533_activate_target_nfcdep(dev); 1836 if (rc) { 1837 nfc_err(dev->dev, 1838 "Activating target with DEP failed %d\n", rc); 1839 return rc; 1840 } 1841 } 1842 1843 dev->tgt_active_prot = protocol; 1844 dev->tgt_available_prots = 0; 1845 1846 return 0; 1847 } 1848 1849 static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg, 1850 struct sk_buff *resp) 1851 { 1852 int rc = 0; 1853 1854 if (IS_ERR(resp)) { 1855 rc = PTR_ERR(resp); 1856 1857 nfc_err(dev->dev, "Target release error %d\n", rc); 1858 1859 return rc; 1860 } 1861 1862 rc = resp->data[0] & PN533_CMD_RET_MASK; 1863 if (rc != PN533_CMD_RET_SUCCESS) 1864 nfc_err(dev->dev, 1865 "Error 0x%x when releasing the target\n", rc); 1866 1867 dev_kfree_skb(resp); 1868 return rc; 1869 } 1870 1871 static void pn533_deactivate_target(struct nfc_dev *nfc_dev, 1872 struct nfc_target *target, u8 mode) 1873 { 1874 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1875 struct sk_buff *skb; 1876 int rc; 1877 1878 if (!dev->tgt_active_prot) { 1879 nfc_err(dev->dev, "There is no active target\n"); 1880 return; 1881 } 1882 1883 dev->tgt_active_prot = 0; 1884 skb_queue_purge(&dev->resp_q); 1885 1886 skb = pn533_alloc_skb(dev, sizeof(u8)); 1887 if (!skb) 1888 return; 1889 1890 skb_put_u8(skb, 1); /* TG*/ 1891 1892 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb, 1893 pn533_deactivate_target_complete, NULL); 1894 if (rc < 0) { 1895 dev_kfree_skb(skb); 1896 nfc_err(dev->dev, "Target release error %d\n", rc); 1897 } 1898 } 1899 1900 1901 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg, 1902 struct sk_buff *resp) 1903 { 1904 struct pn533_cmd_jump_dep_response *rsp; 1905 u8 target_gt_len; 1906 int rc; 1907 u8 active = *(u8 *)arg; 1908 1909 kfree(arg); 1910 1911 if (IS_ERR(resp)) 1912 return PTR_ERR(resp); 1913 1914 if (dev->tgt_available_prots && 1915 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) { 1916 nfc_err(dev->dev, 1917 "The target does not support DEP\n"); 1918 rc = -EINVAL; 1919 goto error; 1920 } 1921 1922 rsp = (struct pn533_cmd_jump_dep_response *)resp->data; 1923 1924 rc = rsp->status & PN533_CMD_RET_MASK; 1925 if (rc != PN533_CMD_RET_SUCCESS) { 1926 nfc_err(dev->dev, 1927 "Bringing DEP link up failed (error 0x%x)\n", rc); 1928 goto error; 1929 } 1930 1931 if (!dev->tgt_available_prots) { 1932 struct nfc_target nfc_target; 1933 1934 dev_dbg(dev->dev, "Creating new target\n"); 1935 1936 memset(&nfc_target, 0, sizeof(struct nfc_target)); 1937 1938 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK; 1939 nfc_target.nfcid1_len = 10; 1940 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len); 1941 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1); 1942 if (rc) 1943 goto error; 1944 1945 dev->tgt_available_prots = 0; 1946 } 1947 1948 dev->tgt_active_prot = NFC_PROTO_NFC_DEP; 1949 1950 /* ATR_RES general bytes are located at offset 17 */ 1951 target_gt_len = resp->len - 17; 1952 rc = nfc_set_remote_general_bytes(dev->nfc_dev, 1953 rsp->gt, target_gt_len); 1954 if (rc == 0) 1955 rc = nfc_dep_link_is_up(dev->nfc_dev, 1956 dev->nfc_dev->targets[0].idx, 1957 !active, NFC_RF_INITIATOR); 1958 1959 error: 1960 dev_kfree_skb(resp); 1961 return rc; 1962 } 1963 1964 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf); 1965 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, 1966 u8 comm_mode, u8 *gb, size_t gb_len) 1967 { 1968 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1969 struct sk_buff *skb; 1970 int rc, skb_len; 1971 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE]; 1972 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3}; 1973 1974 if (dev->poll_mod_count) { 1975 nfc_err(dev->dev, 1976 "Cannot bring the DEP link up while polling\n"); 1977 return -EBUSY; 1978 } 1979 1980 if (dev->tgt_active_prot) { 1981 nfc_err(dev->dev, 1982 "There is already an active target\n"); 1983 return -EBUSY; 1984 } 1985 1986 skb_len = 3 + gb_len; /* ActPass + BR + Next */ 1987 skb_len += PASSIVE_DATA_LEN; 1988 1989 /* NFCID3 */ 1990 skb_len += NFC_NFCID3_MAXSIZE; 1991 if (target && !target->nfcid2_len) { 1992 nfcid3[0] = 0x1; 1993 nfcid3[1] = 0xfe; 1994 get_random_bytes(nfcid3 + 2, 6); 1995 } 1996 1997 skb = pn533_alloc_skb(dev, skb_len); 1998 if (!skb) 1999 return -ENOMEM; 2000 2001 skb_put_u8(skb, !comm_mode); /* ActPass */ 2002 skb_put_u8(skb, 0x02); /* 424 kbps */ 2003 2004 next = skb_put(skb, 1); /* Next */ 2005 *next = 0; 2006 2007 /* Copy passive data */ 2008 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN); 2009 *next |= 1; 2010 2011 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */ 2012 if (target && target->nfcid2_len) 2013 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2, 2014 target->nfcid2_len); 2015 else 2016 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE); 2017 *next |= 2; 2018 2019 if (gb != NULL && gb_len > 0) { 2020 skb_put_data(skb, gb, gb_len); 2021 *next |= 4; /* We have some Gi */ 2022 } else { 2023 *next = 0; 2024 } 2025 2026 arg = kmalloc(sizeof(*arg), GFP_KERNEL); 2027 if (!arg) { 2028 dev_kfree_skb(skb); 2029 return -ENOMEM; 2030 } 2031 2032 *arg = !comm_mode; 2033 2034 pn533_rf_field(dev->nfc_dev, 0); 2035 2036 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb, 2037 pn533_in_dep_link_up_complete, arg); 2038 2039 if (rc < 0) { 2040 dev_kfree_skb(skb); 2041 kfree(arg); 2042 } 2043 2044 return rc; 2045 } 2046 2047 static int pn533_dep_link_down(struct nfc_dev *nfc_dev) 2048 { 2049 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2050 2051 pn533_poll_reset_mod_list(dev); 2052 2053 if (dev->tgt_mode || dev->tgt_active_prot) 2054 dev->phy_ops->abort_cmd(dev, GFP_KERNEL); 2055 2056 dev->tgt_active_prot = 0; 2057 dev->tgt_mode = 0; 2058 2059 skb_queue_purge(&dev->resp_q); 2060 2061 return 0; 2062 } 2063 2064 struct pn533_data_exchange_arg { 2065 data_exchange_cb_t cb; 2066 void *cb_context; 2067 }; 2068 2069 static struct sk_buff *pn533_build_response(struct pn533 *dev) 2070 { 2071 struct sk_buff *skb, *tmp, *t; 2072 unsigned int skb_len = 0, tmp_len = 0; 2073 2074 if (skb_queue_empty(&dev->resp_q)) 2075 return NULL; 2076 2077 if (skb_queue_len(&dev->resp_q) == 1) { 2078 skb = skb_dequeue(&dev->resp_q); 2079 goto out; 2080 } 2081 2082 skb_queue_walk_safe(&dev->resp_q, tmp, t) 2083 skb_len += tmp->len; 2084 2085 dev_dbg(dev->dev, "%s total length %d\n", 2086 __func__, skb_len); 2087 2088 skb = alloc_skb(skb_len, GFP_KERNEL); 2089 if (skb == NULL) 2090 goto out; 2091 2092 skb_put(skb, skb_len); 2093 2094 skb_queue_walk_safe(&dev->resp_q, tmp, t) { 2095 memcpy(skb->data + tmp_len, tmp->data, tmp->len); 2096 tmp_len += tmp->len; 2097 } 2098 2099 out: 2100 skb_queue_purge(&dev->resp_q); 2101 2102 return skb; 2103 } 2104 2105 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg, 2106 struct sk_buff *resp) 2107 { 2108 struct pn533_data_exchange_arg *arg = _arg; 2109 struct sk_buff *skb; 2110 int rc = 0; 2111 u8 status, ret, mi; 2112 2113 if (IS_ERR(resp)) { 2114 rc = PTR_ERR(resp); 2115 goto _error; 2116 } 2117 2118 status = resp->data[0]; 2119 ret = status & PN533_CMD_RET_MASK; 2120 mi = status & PN533_CMD_MI_MASK; 2121 2122 skb_pull(resp, sizeof(status)); 2123 2124 if (ret != PN533_CMD_RET_SUCCESS) { 2125 nfc_err(dev->dev, 2126 "Exchanging data failed (error 0x%x)\n", ret); 2127 rc = -EIO; 2128 goto error; 2129 } 2130 2131 skb_queue_tail(&dev->resp_q, resp); 2132 2133 if (mi) { 2134 dev->cmd_complete_mi_arg = arg; 2135 queue_work(dev->wq, &dev->mi_rx_work); 2136 return -EINPROGRESS; 2137 } 2138 2139 /* Prepare for the next round */ 2140 if (skb_queue_len(&dev->fragment_skb) > 0) { 2141 dev->cmd_complete_dep_arg = arg; 2142 queue_work(dev->wq, &dev->mi_tx_work); 2143 2144 return -EINPROGRESS; 2145 } 2146 2147 skb = pn533_build_response(dev); 2148 if (!skb) { 2149 rc = -ENOMEM; 2150 goto error; 2151 } 2152 2153 arg->cb(arg->cb_context, skb, 0); 2154 kfree(arg); 2155 return 0; 2156 2157 error: 2158 dev_kfree_skb(resp); 2159 _error: 2160 skb_queue_purge(&dev->resp_q); 2161 arg->cb(arg->cb_context, NULL, rc); 2162 kfree(arg); 2163 return rc; 2164 } 2165 2166 /* 2167 * Receive an incoming pn533 frame. skb contains only header and payload. 2168 * If skb == NULL, it is a notification that the link below is dead. 2169 */ 2170 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status) 2171 { 2172 if (!dev->cmd) 2173 goto sched_wq; 2174 2175 dev->cmd->status = status; 2176 2177 if (status != 0) { 2178 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status); 2179 goto sched_wq; 2180 } 2181 2182 if (skb == NULL) { 2183 dev_err(dev->dev, "NULL Frame -> link is dead\n"); 2184 goto sched_wq; 2185 } 2186 2187 if (pn533_rx_frame_is_ack(skb->data)) { 2188 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__); 2189 dev_kfree_skb(skb); 2190 return; 2191 } 2192 2193 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data, 2194 dev->ops->rx_frame_size(skb->data), false); 2195 2196 if (!dev->ops->rx_is_frame_valid(skb->data, dev)) { 2197 nfc_err(dev->dev, "Received an invalid frame\n"); 2198 dev->cmd->status = -EIO; 2199 } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) { 2200 nfc_err(dev->dev, "It it not the response to the last command\n"); 2201 dev->cmd->status = -EIO; 2202 } 2203 2204 dev->cmd->resp = skb; 2205 2206 sched_wq: 2207 queue_work(dev->wq, &dev->cmd_complete_work); 2208 } 2209 EXPORT_SYMBOL(pn533_recv_frame); 2210 2211 /* Split the Tx skb into small chunks */ 2212 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb) 2213 { 2214 struct sk_buff *frag; 2215 int frag_size; 2216 2217 do { 2218 /* Remaining size */ 2219 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN) 2220 frag_size = PN533_CMD_DATAFRAME_MAXLEN; 2221 else 2222 frag_size = skb->len; 2223 2224 /* Allocate and reserve */ 2225 frag = pn533_alloc_skb(dev, frag_size); 2226 if (!frag) { 2227 skb_queue_purge(&dev->fragment_skb); 2228 return -ENOMEM; 2229 } 2230 2231 if (!dev->tgt_mode) { 2232 /* Reserve the TG/MI byte */ 2233 skb_reserve(frag, 1); 2234 2235 /* MI + TG */ 2236 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN) 2237 *(u8 *)skb_push(frag, sizeof(u8)) = 2238 (PN533_CMD_MI_MASK | 1); 2239 else 2240 *(u8 *)skb_push(frag, sizeof(u8)) = 1; /* TG */ 2241 } 2242 2243 skb_put_data(frag, skb->data, frag_size); 2244 2245 /* Reduce the size of incoming buffer */ 2246 skb_pull(skb, frag_size); 2247 2248 /* Add this to skb_queue */ 2249 skb_queue_tail(&dev->fragment_skb, frag); 2250 2251 } while (skb->len > 0); 2252 2253 dev_kfree_skb(skb); 2254 2255 return skb_queue_len(&dev->fragment_skb); 2256 } 2257 2258 static int pn533_transceive(struct nfc_dev *nfc_dev, 2259 struct nfc_target *target, struct sk_buff *skb, 2260 data_exchange_cb_t cb, void *cb_context) 2261 { 2262 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2263 struct pn533_data_exchange_arg *arg = NULL; 2264 int rc; 2265 2266 if (!dev->tgt_active_prot) { 2267 nfc_err(dev->dev, 2268 "Can't exchange data if there is no active target\n"); 2269 rc = -EINVAL; 2270 goto error; 2271 } 2272 2273 arg = kmalloc(sizeof(*arg), GFP_KERNEL); 2274 if (!arg) { 2275 rc = -ENOMEM; 2276 goto error; 2277 } 2278 2279 arg->cb = cb; 2280 arg->cb_context = cb_context; 2281 2282 switch (dev->device_type) { 2283 case PN533_DEVICE_PASORI: 2284 if (dev->tgt_active_prot == NFC_PROTO_FELICA) { 2285 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU, 2286 skb, 2287 pn533_data_exchange_complete, 2288 arg); 2289 2290 break; 2291 } 2292 fallthrough; 2293 default: 2294 /* jumbo frame ? */ 2295 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { 2296 rc = pn533_fill_fragment_skbs(dev, skb); 2297 if (rc < 0) 2298 goto error; 2299 2300 skb = skb_dequeue(&dev->fragment_skb); 2301 if (!skb) { 2302 rc = -EIO; 2303 goto error; 2304 } 2305 } else { 2306 *(u8 *)skb_push(skb, sizeof(u8)) = 1; /* TG */ 2307 } 2308 2309 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE, 2310 skb, pn533_data_exchange_complete, 2311 arg); 2312 2313 break; 2314 } 2315 2316 if (rc < 0) /* rc from send_async */ 2317 goto error; 2318 2319 return 0; 2320 2321 error: 2322 kfree(arg); 2323 dev_kfree_skb(skb); 2324 return rc; 2325 } 2326 2327 static int pn533_tm_send_complete(struct pn533 *dev, void *arg, 2328 struct sk_buff *resp) 2329 { 2330 u8 status; 2331 2332 if (IS_ERR(resp)) 2333 return PTR_ERR(resp); 2334 2335 status = resp->data[0]; 2336 2337 /* Prepare for the next round */ 2338 if (skb_queue_len(&dev->fragment_skb) > 0) { 2339 queue_work(dev->wq, &dev->mi_tm_tx_work); 2340 return -EINPROGRESS; 2341 } 2342 dev_kfree_skb(resp); 2343 2344 if (status != 0) { 2345 nfc_tm_deactivated(dev->nfc_dev); 2346 2347 dev->tgt_mode = 0; 2348 2349 return 0; 2350 } 2351 2352 queue_work(dev->wq, &dev->tg_work); 2353 2354 return 0; 2355 } 2356 2357 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) 2358 { 2359 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2360 int rc; 2361 2362 /* let's split in multiple chunks if size's too big */ 2363 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { 2364 rc = pn533_fill_fragment_skbs(dev, skb); 2365 if (rc < 0) 2366 goto error; 2367 2368 /* get the first skb */ 2369 skb = skb_dequeue(&dev->fragment_skb); 2370 if (!skb) { 2371 rc = -EIO; 2372 goto error; 2373 } 2374 2375 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb, 2376 pn533_tm_send_complete, NULL); 2377 } else { 2378 /* Send th skb */ 2379 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb, 2380 pn533_tm_send_complete, NULL); 2381 } 2382 2383 error: 2384 if (rc < 0) { 2385 dev_kfree_skb(skb); 2386 skb_queue_purge(&dev->fragment_skb); 2387 } 2388 2389 return rc; 2390 } 2391 2392 static void pn533_wq_mi_recv(struct work_struct *work) 2393 { 2394 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work); 2395 struct sk_buff *skb; 2396 int rc; 2397 2398 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN); 2399 if (!skb) 2400 goto error; 2401 2402 switch (dev->device_type) { 2403 case PN533_DEVICE_PASORI: 2404 if (dev->tgt_active_prot == NFC_PROTO_FELICA) { 2405 rc = pn533_send_cmd_direct_async(dev, 2406 PN533_CMD_IN_COMM_THRU, 2407 skb, 2408 pn533_data_exchange_complete, 2409 dev->cmd_complete_mi_arg); 2410 2411 break; 2412 } 2413 fallthrough; 2414 default: 2415 skb_put_u8(skb, 1); /*TG*/ 2416 2417 rc = pn533_send_cmd_direct_async(dev, 2418 PN533_CMD_IN_DATA_EXCHANGE, 2419 skb, 2420 pn533_data_exchange_complete, 2421 dev->cmd_complete_mi_arg); 2422 2423 break; 2424 } 2425 2426 if (rc == 0) /* success */ 2427 return; 2428 2429 nfc_err(dev->dev, 2430 "Error %d when trying to perform data_exchange\n", rc); 2431 2432 dev_kfree_skb(skb); 2433 kfree(dev->cmd_complete_mi_arg); 2434 2435 error: 2436 dev->phy_ops->send_ack(dev, GFP_KERNEL); 2437 queue_work(dev->wq, &dev->cmd_work); 2438 } 2439 2440 static void pn533_wq_mi_send(struct work_struct *work) 2441 { 2442 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work); 2443 struct sk_buff *skb; 2444 int rc; 2445 2446 /* Grab the first skb in the queue */ 2447 skb = skb_dequeue(&dev->fragment_skb); 2448 2449 if (skb == NULL) { /* No more data */ 2450 /* Reset the queue for future use */ 2451 skb_queue_head_init(&dev->fragment_skb); 2452 goto error; 2453 } 2454 2455 switch (dev->device_type) { 2456 case PN533_DEVICE_PASORI: 2457 if (dev->tgt_active_prot != NFC_PROTO_FELICA) { 2458 rc = -EIO; 2459 break; 2460 } 2461 2462 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU, 2463 skb, 2464 pn533_data_exchange_complete, 2465 dev->cmd_complete_dep_arg); 2466 2467 break; 2468 2469 default: 2470 /* Still some fragments? */ 2471 rc = pn533_send_cmd_direct_async(dev, 2472 PN533_CMD_IN_DATA_EXCHANGE, 2473 skb, 2474 pn533_data_exchange_complete, 2475 dev->cmd_complete_dep_arg); 2476 2477 break; 2478 } 2479 2480 if (rc == 0) /* success */ 2481 return; 2482 2483 nfc_err(dev->dev, 2484 "Error %d when trying to perform data_exchange\n", rc); 2485 2486 dev_kfree_skb(skb); 2487 kfree(dev->cmd_complete_dep_arg); 2488 2489 error: 2490 dev->phy_ops->send_ack(dev, GFP_KERNEL); 2491 queue_work(dev->wq, &dev->cmd_work); 2492 } 2493 2494 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata, 2495 u8 cfgdata_len) 2496 { 2497 struct sk_buff *skb; 2498 struct sk_buff *resp; 2499 int skb_len; 2500 2501 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */ 2502 2503 skb = pn533_alloc_skb(dev, skb_len); 2504 if (!skb) 2505 return -ENOMEM; 2506 2507 skb_put_u8(skb, cfgitem); 2508 skb_put_data(skb, cfgdata, cfgdata_len); 2509 2510 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb); 2511 if (IS_ERR(resp)) 2512 return PTR_ERR(resp); 2513 2514 dev_kfree_skb(resp); 2515 return 0; 2516 } 2517 2518 static int pn533_get_firmware_version(struct pn533 *dev, 2519 struct pn533_fw_version *fv) 2520 { 2521 struct sk_buff *skb; 2522 struct sk_buff *resp; 2523 2524 skb = pn533_alloc_skb(dev, 0); 2525 if (!skb) 2526 return -ENOMEM; 2527 2528 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb); 2529 if (IS_ERR(resp)) 2530 return PTR_ERR(resp); 2531 2532 fv->ic = resp->data[0]; 2533 fv->ver = resp->data[1]; 2534 fv->rev = resp->data[2]; 2535 fv->support = resp->data[3]; 2536 2537 dev_kfree_skb(resp); 2538 return 0; 2539 } 2540 2541 static int pn533_pasori_fw_reset(struct pn533 *dev) 2542 { 2543 struct sk_buff *skb; 2544 struct sk_buff *resp; 2545 2546 skb = pn533_alloc_skb(dev, sizeof(u8)); 2547 if (!skb) 2548 return -ENOMEM; 2549 2550 skb_put_u8(skb, 0x1); 2551 2552 resp = pn533_send_cmd_sync(dev, 0x18, skb); 2553 if (IS_ERR(resp)) 2554 return PTR_ERR(resp); 2555 2556 dev_kfree_skb(resp); 2557 2558 return 0; 2559 } 2560 2561 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf) 2562 { 2563 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2564 u8 rf_field = !!rf; 2565 int rc; 2566 2567 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA; 2568 2569 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD, 2570 (u8 *)&rf_field, 1); 2571 if (rc) { 2572 nfc_err(dev->dev, "Error on setting RF field\n"); 2573 return rc; 2574 } 2575 2576 return 0; 2577 } 2578 2579 static int pn532_sam_configuration(struct nfc_dev *nfc_dev) 2580 { 2581 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2582 struct sk_buff *skb; 2583 struct sk_buff *resp; 2584 2585 skb = pn533_alloc_skb(dev, 1); 2586 if (!skb) 2587 return -ENOMEM; 2588 2589 skb_put_u8(skb, 0x01); 2590 2591 resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb); 2592 if (IS_ERR(resp)) 2593 return PTR_ERR(resp); 2594 2595 dev_kfree_skb(resp); 2596 return 0; 2597 } 2598 2599 static int pn533_dev_up(struct nfc_dev *nfc_dev) 2600 { 2601 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2602 int rc; 2603 2604 if (dev->phy_ops->dev_up) { 2605 rc = dev->phy_ops->dev_up(dev); 2606 if (rc) 2607 return rc; 2608 } 2609 2610 if ((dev->device_type == PN533_DEVICE_PN532) || 2611 (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) { 2612 rc = pn532_sam_configuration(nfc_dev); 2613 2614 if (rc) 2615 return rc; 2616 } 2617 2618 return pn533_rf_field(nfc_dev, 1); 2619 } 2620 2621 static int pn533_dev_down(struct nfc_dev *nfc_dev) 2622 { 2623 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2624 int ret; 2625 2626 ret = pn533_rf_field(nfc_dev, 0); 2627 if (dev->phy_ops->dev_down && !ret) 2628 ret = dev->phy_ops->dev_down(dev); 2629 2630 return ret; 2631 } 2632 2633 static const struct nfc_ops pn533_nfc_ops = { 2634 .dev_up = pn533_dev_up, 2635 .dev_down = pn533_dev_down, 2636 .dep_link_up = pn533_dep_link_up, 2637 .dep_link_down = pn533_dep_link_down, 2638 .start_poll = pn533_start_poll, 2639 .stop_poll = pn533_stop_poll, 2640 .activate_target = pn533_activate_target, 2641 .deactivate_target = pn533_deactivate_target, 2642 .im_transceive = pn533_transceive, 2643 .tm_send = pn533_tm_send, 2644 }; 2645 2646 static int pn533_setup(struct pn533 *dev) 2647 { 2648 struct pn533_config_max_retries max_retries; 2649 struct pn533_config_timing timing; 2650 u8 pasori_cfg[3] = {0x08, 0x01, 0x08}; 2651 int rc; 2652 2653 switch (dev->device_type) { 2654 case PN533_DEVICE_STD: 2655 case PN533_DEVICE_PASORI: 2656 case PN533_DEVICE_ACR122U: 2657 case PN533_DEVICE_PN532: 2658 case PN533_DEVICE_PN532_AUTOPOLL: 2659 max_retries.mx_rty_atr = 0x2; 2660 max_retries.mx_rty_psl = 0x1; 2661 max_retries.mx_rty_passive_act = 2662 PN533_CONFIG_MAX_RETRIES_NO_RETRY; 2663 2664 timing.rfu = PN533_CONFIG_TIMING_102; 2665 timing.atr_res_timeout = PN533_CONFIG_TIMING_102; 2666 timing.dep_timeout = PN533_CONFIG_TIMING_204; 2667 2668 break; 2669 2670 default: 2671 nfc_err(dev->dev, "Unknown device type %d\n", 2672 dev->device_type); 2673 return -EINVAL; 2674 } 2675 2676 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES, 2677 (u8 *)&max_retries, sizeof(max_retries)); 2678 if (rc) { 2679 nfc_err(dev->dev, 2680 "Error on setting MAX_RETRIES config\n"); 2681 return rc; 2682 } 2683 2684 2685 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING, 2686 (u8 *)&timing, sizeof(timing)); 2687 if (rc) { 2688 nfc_err(dev->dev, "Error on setting RF timings\n"); 2689 return rc; 2690 } 2691 2692 switch (dev->device_type) { 2693 case PN533_DEVICE_STD: 2694 case PN533_DEVICE_PN532: 2695 case PN533_DEVICE_PN532_AUTOPOLL: 2696 break; 2697 2698 case PN533_DEVICE_PASORI: 2699 pn533_pasori_fw_reset(dev); 2700 2701 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI, 2702 pasori_cfg, 3); 2703 if (rc) { 2704 nfc_err(dev->dev, 2705 "Error while settings PASORI config\n"); 2706 return rc; 2707 } 2708 2709 pn533_pasori_fw_reset(dev); 2710 2711 break; 2712 } 2713 2714 return 0; 2715 } 2716 2717 int pn533_finalize_setup(struct pn533 *dev) 2718 { 2719 2720 struct pn533_fw_version fw_ver; 2721 int rc; 2722 2723 memset(&fw_ver, 0, sizeof(fw_ver)); 2724 2725 rc = pn533_get_firmware_version(dev, &fw_ver); 2726 if (rc) { 2727 nfc_err(dev->dev, "Unable to get FW version\n"); 2728 return rc; 2729 } 2730 2731 nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n", 2732 fw_ver.ic, fw_ver.ver, fw_ver.rev); 2733 2734 rc = pn533_setup(dev); 2735 if (rc) 2736 return rc; 2737 2738 return 0; 2739 } 2740 EXPORT_SYMBOL_GPL(pn533_finalize_setup); 2741 2742 struct pn533 *pn53x_common_init(u32 device_type, 2743 enum pn533_protocol_type protocol_type, 2744 void *phy, 2745 const struct pn533_phy_ops *phy_ops, 2746 struct pn533_frame_ops *fops, 2747 struct device *dev) 2748 { 2749 struct pn533 *priv; 2750 2751 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 2752 if (!priv) 2753 return ERR_PTR(-ENOMEM); 2754 2755 priv->phy = phy; 2756 priv->phy_ops = phy_ops; 2757 priv->dev = dev; 2758 if (fops != NULL) 2759 priv->ops = fops; 2760 else 2761 priv->ops = &pn533_std_frame_ops; 2762 2763 priv->protocol_type = protocol_type; 2764 priv->device_type = device_type; 2765 2766 mutex_init(&priv->cmd_lock); 2767 2768 INIT_WORK(&priv->cmd_work, pn533_wq_cmd); 2769 INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete); 2770 INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv); 2771 INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send); 2772 INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data); 2773 INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv); 2774 INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send); 2775 INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll); 2776 INIT_WORK(&priv->rf_work, pn533_wq_rf); 2777 priv->wq = alloc_ordered_workqueue("pn533", 0); 2778 if (priv->wq == NULL) 2779 goto error; 2780 2781 timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0); 2782 2783 skb_queue_head_init(&priv->resp_q); 2784 skb_queue_head_init(&priv->fragment_skb); 2785 2786 INIT_LIST_HEAD(&priv->cmd_queue); 2787 return priv; 2788 2789 error: 2790 kfree(priv); 2791 return ERR_PTR(-ENOMEM); 2792 } 2793 EXPORT_SYMBOL_GPL(pn53x_common_init); 2794 2795 void pn53x_common_clean(struct pn533 *priv) 2796 { 2797 struct pn533_cmd *cmd, *n; 2798 2799 /* delete the timer before cleanup the worker */ 2800 timer_shutdown_sync(&priv->listen_timer); 2801 2802 flush_delayed_work(&priv->poll_work); 2803 destroy_workqueue(priv->wq); 2804 2805 skb_queue_purge(&priv->resp_q); 2806 2807 list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) { 2808 list_del(&cmd->queue); 2809 kfree(cmd); 2810 } 2811 2812 kfree(priv); 2813 } 2814 EXPORT_SYMBOL_GPL(pn53x_common_clean); 2815 2816 int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols, 2817 struct device *parent) 2818 { 2819 priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols, 2820 priv->ops->tx_header_len + 2821 PN533_CMD_DATAEXCH_HEAD_LEN, 2822 priv->ops->tx_tail_len); 2823 if (!priv->nfc_dev) 2824 return -ENOMEM; 2825 2826 nfc_set_parent_dev(priv->nfc_dev, parent); 2827 nfc_set_drvdata(priv->nfc_dev, priv); 2828 return 0; 2829 } 2830 EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc); 2831 2832 int pn53x_register_nfc(struct pn533 *priv, u32 protocols, 2833 struct device *parent) 2834 { 2835 int rc; 2836 2837 rc = pn532_i2c_nfc_alloc(priv, protocols, parent); 2838 if (rc) 2839 return rc; 2840 2841 rc = nfc_register_device(priv->nfc_dev); 2842 if (rc) 2843 nfc_free_device(priv->nfc_dev); 2844 2845 return rc; 2846 } 2847 EXPORT_SYMBOL_GPL(pn53x_register_nfc); 2848 2849 void pn53x_unregister_nfc(struct pn533 *priv) 2850 { 2851 nfc_unregister_device(priv->nfc_dev); 2852 nfc_free_device(priv->nfc_dev); 2853 } 2854 EXPORT_SYMBOL_GPL(pn53x_unregister_nfc); 2855 2856 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>"); 2857 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>"); 2858 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>"); 2859 MODULE_DESCRIPTION("PN533 driver ver " VERSION); 2860 MODULE_VERSION(VERSION); 2861 MODULE_LICENSE("GPL"); 2862