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_dbg(dev->dev, "Listen mode timeout\n"); 1239 1240 dev->cancel_listen = 1; 1241 1242 pn533_poll_next_mod(dev); 1243 1244 queue_delayed_work(dev->wq, &dev->poll_work, 1245 msecs_to_jiffies(PN533_POLL_INTERVAL)); 1246 } 1247 1248 static int pn533_rf_complete(struct pn533 *dev, void *arg, 1249 struct sk_buff *resp) 1250 { 1251 int rc = 0; 1252 1253 if (IS_ERR(resp)) { 1254 rc = PTR_ERR(resp); 1255 1256 nfc_err(dev->dev, "RF setting error %d\n", rc); 1257 1258 return rc; 1259 } 1260 1261 queue_delayed_work(dev->wq, &dev->poll_work, 1262 msecs_to_jiffies(PN533_POLL_INTERVAL)); 1263 1264 dev_kfree_skb(resp); 1265 return rc; 1266 } 1267 1268 static void pn533_wq_rf(struct work_struct *work) 1269 { 1270 struct pn533 *dev = container_of(work, struct pn533, rf_work); 1271 struct sk_buff *skb; 1272 int rc; 1273 1274 skb = pn533_alloc_skb(dev, 2); 1275 if (!skb) 1276 return; 1277 1278 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD); 1279 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA); 1280 1281 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb, 1282 pn533_rf_complete, NULL); 1283 if (rc < 0) { 1284 dev_kfree_skb(skb); 1285 nfc_err(dev->dev, "RF setting error %d\n", rc); 1286 } 1287 } 1288 1289 static int pn533_poll_dep_complete(struct pn533 *dev, void *arg, 1290 struct sk_buff *resp) 1291 { 1292 struct pn533_cmd_jump_dep_response *rsp; 1293 struct nfc_target nfc_target; 1294 u8 target_gt_len; 1295 int rc; 1296 1297 if (IS_ERR(resp)) 1298 return PTR_ERR(resp); 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 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 1743 static 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 1760 static 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 1796 static 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 1844 static 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 1866 static 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 1896 static 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 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK; 1932 nfc_target.nfcid1_len = 10; 1933 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len); 1934 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1); 1935 if (rc) 1936 goto error; 1937 1938 dev->tgt_available_prots = 0; 1939 } 1940 1941 dev->tgt_active_prot = NFC_PROTO_NFC_DEP; 1942 1943 /* ATR_RES general bytes are located at offset 17 */ 1944 target_gt_len = resp->len - 17; 1945 rc = nfc_set_remote_general_bytes(dev->nfc_dev, 1946 rsp->gt, target_gt_len); 1947 if (rc == 0) 1948 rc = nfc_dep_link_is_up(dev->nfc_dev, 1949 dev->nfc_dev->targets[0].idx, 1950 !active, NFC_RF_INITIATOR); 1951 1952 error: 1953 dev_kfree_skb(resp); 1954 return rc; 1955 } 1956 1957 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf); 1958 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, 1959 u8 comm_mode, u8 *gb, size_t gb_len) 1960 { 1961 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1962 struct sk_buff *skb; 1963 int rc, skb_len; 1964 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE]; 1965 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3}; 1966 1967 if (dev->poll_mod_count) { 1968 nfc_err(dev->dev, 1969 "Cannot bring the DEP link up while polling\n"); 1970 return -EBUSY; 1971 } 1972 1973 if (dev->tgt_active_prot) { 1974 nfc_err(dev->dev, 1975 "There is already an active target\n"); 1976 return -EBUSY; 1977 } 1978 1979 skb_len = 3 + gb_len; /* ActPass + BR + Next */ 1980 skb_len += PASSIVE_DATA_LEN; 1981 1982 /* NFCID3 */ 1983 skb_len += NFC_NFCID3_MAXSIZE; 1984 if (target && !target->nfcid2_len) { 1985 nfcid3[0] = 0x1; 1986 nfcid3[1] = 0xfe; 1987 get_random_bytes(nfcid3 + 2, 6); 1988 } 1989 1990 skb = pn533_alloc_skb(dev, skb_len); 1991 if (!skb) 1992 return -ENOMEM; 1993 1994 skb_put_u8(skb, !comm_mode); /* ActPass */ 1995 skb_put_u8(skb, 0x02); /* 424 kbps */ 1996 1997 next = skb_put(skb, 1); /* Next */ 1998 *next = 0; 1999 2000 /* Copy passive data */ 2001 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN); 2002 *next |= 1; 2003 2004 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */ 2005 if (target && target->nfcid2_len) 2006 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2, 2007 target->nfcid2_len); 2008 else 2009 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE); 2010 *next |= 2; 2011 2012 if (gb != NULL && gb_len > 0) { 2013 skb_put_data(skb, gb, gb_len); 2014 *next |= 4; /* We have some Gi */ 2015 } else { 2016 *next = 0; 2017 } 2018 2019 arg = kmalloc(sizeof(*arg), GFP_KERNEL); 2020 if (!arg) { 2021 dev_kfree_skb(skb); 2022 return -ENOMEM; 2023 } 2024 2025 *arg = !comm_mode; 2026 2027 pn533_rf_field(dev->nfc_dev, 0); 2028 2029 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb, 2030 pn533_in_dep_link_up_complete, arg); 2031 2032 if (rc < 0) { 2033 dev_kfree_skb(skb); 2034 kfree(arg); 2035 } 2036 2037 return rc; 2038 } 2039 2040 static int pn533_dep_link_down(struct nfc_dev *nfc_dev) 2041 { 2042 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2043 2044 pn533_poll_reset_mod_list(dev); 2045 2046 if (dev->tgt_mode || dev->tgt_active_prot) 2047 dev->phy_ops->abort_cmd(dev, GFP_KERNEL); 2048 2049 dev->tgt_active_prot = 0; 2050 dev->tgt_mode = 0; 2051 2052 skb_queue_purge(&dev->resp_q); 2053 2054 return 0; 2055 } 2056 2057 struct pn533_data_exchange_arg { 2058 data_exchange_cb_t cb; 2059 void *cb_context; 2060 }; 2061 2062 static struct sk_buff *pn533_build_response(struct pn533 *dev) 2063 { 2064 struct sk_buff *skb, *tmp, *t; 2065 unsigned int skb_len = 0, tmp_len = 0; 2066 2067 if (skb_queue_empty(&dev->resp_q)) 2068 return NULL; 2069 2070 if (skb_queue_len(&dev->resp_q) == 1) { 2071 skb = skb_dequeue(&dev->resp_q); 2072 goto out; 2073 } 2074 2075 skb_queue_walk_safe(&dev->resp_q, tmp, t) 2076 skb_len += tmp->len; 2077 2078 dev_dbg(dev->dev, "%s total length %d\n", 2079 __func__, skb_len); 2080 2081 skb = alloc_skb(skb_len, GFP_KERNEL); 2082 if (skb == NULL) 2083 goto out; 2084 2085 skb_put(skb, skb_len); 2086 2087 skb_queue_walk_safe(&dev->resp_q, tmp, t) { 2088 memcpy(skb->data + tmp_len, tmp->data, tmp->len); 2089 tmp_len += tmp->len; 2090 } 2091 2092 out: 2093 skb_queue_purge(&dev->resp_q); 2094 2095 return skb; 2096 } 2097 2098 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg, 2099 struct sk_buff *resp) 2100 { 2101 struct pn533_data_exchange_arg *arg = _arg; 2102 struct sk_buff *skb; 2103 int rc = 0; 2104 u8 status, ret, mi; 2105 2106 if (IS_ERR(resp)) { 2107 rc = PTR_ERR(resp); 2108 goto _error; 2109 } 2110 2111 status = resp->data[0]; 2112 ret = status & PN533_CMD_RET_MASK; 2113 mi = status & PN533_CMD_MI_MASK; 2114 2115 skb_pull(resp, sizeof(status)); 2116 2117 if (ret != PN533_CMD_RET_SUCCESS) { 2118 nfc_err(dev->dev, 2119 "Exchanging data failed (error 0x%x)\n", ret); 2120 rc = -EIO; 2121 goto error; 2122 } 2123 2124 skb_queue_tail(&dev->resp_q, resp); 2125 2126 if (mi) { 2127 dev->cmd_complete_mi_arg = arg; 2128 queue_work(dev->wq, &dev->mi_rx_work); 2129 return -EINPROGRESS; 2130 } 2131 2132 /* Prepare for the next round */ 2133 if (skb_queue_len(&dev->fragment_skb) > 0) { 2134 dev->cmd_complete_dep_arg = arg; 2135 queue_work(dev->wq, &dev->mi_tx_work); 2136 2137 return -EINPROGRESS; 2138 } 2139 2140 skb = pn533_build_response(dev); 2141 if (!skb) { 2142 rc = -ENOMEM; 2143 goto error; 2144 } 2145 2146 arg->cb(arg->cb_context, skb, 0); 2147 kfree(arg); 2148 return 0; 2149 2150 error: 2151 dev_kfree_skb(resp); 2152 _error: 2153 skb_queue_purge(&dev->resp_q); 2154 arg->cb(arg->cb_context, NULL, rc); 2155 kfree(arg); 2156 return rc; 2157 } 2158 2159 /* 2160 * Receive an incoming pn533 frame. skb contains only header and payload. 2161 * If skb == NULL, it is a notification that the link below is dead. 2162 */ 2163 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status) 2164 { 2165 if (!dev->cmd) 2166 goto sched_wq; 2167 2168 dev->cmd->status = status; 2169 2170 if (status != 0) { 2171 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status); 2172 goto sched_wq; 2173 } 2174 2175 if (skb == NULL) { 2176 pr_err("NULL Frame -> link is dead\n"); 2177 goto sched_wq; 2178 } 2179 2180 if (pn533_rx_frame_is_ack(skb->data)) { 2181 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__); 2182 dev_kfree_skb(skb); 2183 return; 2184 } 2185 2186 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data, 2187 dev->ops->rx_frame_size(skb->data), false); 2188 2189 if (!dev->ops->rx_is_frame_valid(skb->data, dev)) { 2190 nfc_err(dev->dev, "Received an invalid frame\n"); 2191 dev->cmd->status = -EIO; 2192 } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) { 2193 nfc_err(dev->dev, "It it not the response to the last command\n"); 2194 dev->cmd->status = -EIO; 2195 } 2196 2197 dev->cmd->resp = skb; 2198 2199 sched_wq: 2200 queue_work(dev->wq, &dev->cmd_complete_work); 2201 } 2202 EXPORT_SYMBOL(pn533_recv_frame); 2203 2204 /* Split the Tx skb into small chunks */ 2205 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb) 2206 { 2207 struct sk_buff *frag; 2208 int frag_size; 2209 2210 do { 2211 /* Remaining size */ 2212 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN) 2213 frag_size = PN533_CMD_DATAFRAME_MAXLEN; 2214 else 2215 frag_size = skb->len; 2216 2217 /* Allocate and reserve */ 2218 frag = pn533_alloc_skb(dev, frag_size); 2219 if (!frag) { 2220 skb_queue_purge(&dev->fragment_skb); 2221 break; 2222 } 2223 2224 if (!dev->tgt_mode) { 2225 /* Reserve the TG/MI byte */ 2226 skb_reserve(frag, 1); 2227 2228 /* MI + TG */ 2229 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN) 2230 *(u8 *)skb_push(frag, sizeof(u8)) = 2231 (PN533_CMD_MI_MASK | 1); 2232 else 2233 *(u8 *)skb_push(frag, sizeof(u8)) = 1; /* TG */ 2234 } 2235 2236 skb_put_data(frag, skb->data, frag_size); 2237 2238 /* Reduce the size of incoming buffer */ 2239 skb_pull(skb, frag_size); 2240 2241 /* Add this to skb_queue */ 2242 skb_queue_tail(&dev->fragment_skb, frag); 2243 2244 } while (skb->len > 0); 2245 2246 dev_kfree_skb(skb); 2247 2248 return skb_queue_len(&dev->fragment_skb); 2249 } 2250 2251 static int pn533_transceive(struct nfc_dev *nfc_dev, 2252 struct nfc_target *target, struct sk_buff *skb, 2253 data_exchange_cb_t cb, void *cb_context) 2254 { 2255 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2256 struct pn533_data_exchange_arg *arg = NULL; 2257 int rc; 2258 2259 if (!dev->tgt_active_prot) { 2260 nfc_err(dev->dev, 2261 "Can't exchange data if there is no active target\n"); 2262 rc = -EINVAL; 2263 goto error; 2264 } 2265 2266 arg = kmalloc(sizeof(*arg), GFP_KERNEL); 2267 if (!arg) { 2268 rc = -ENOMEM; 2269 goto error; 2270 } 2271 2272 arg->cb = cb; 2273 arg->cb_context = cb_context; 2274 2275 switch (dev->device_type) { 2276 case PN533_DEVICE_PASORI: 2277 if (dev->tgt_active_prot == NFC_PROTO_FELICA) { 2278 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU, 2279 skb, 2280 pn533_data_exchange_complete, 2281 arg); 2282 2283 break; 2284 } 2285 fallthrough; 2286 default: 2287 /* jumbo frame ? */ 2288 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { 2289 rc = pn533_fill_fragment_skbs(dev, skb); 2290 if (rc <= 0) 2291 goto error; 2292 2293 skb = skb_dequeue(&dev->fragment_skb); 2294 if (!skb) { 2295 rc = -EIO; 2296 goto error; 2297 } 2298 } else { 2299 *(u8 *)skb_push(skb, sizeof(u8)) = 1; /* TG */ 2300 } 2301 2302 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE, 2303 skb, pn533_data_exchange_complete, 2304 arg); 2305 2306 break; 2307 } 2308 2309 if (rc < 0) /* rc from send_async */ 2310 goto error; 2311 2312 return 0; 2313 2314 error: 2315 kfree(arg); 2316 dev_kfree_skb(skb); 2317 return rc; 2318 } 2319 2320 static int pn533_tm_send_complete(struct pn533 *dev, void *arg, 2321 struct sk_buff *resp) 2322 { 2323 u8 status; 2324 2325 if (IS_ERR(resp)) 2326 return PTR_ERR(resp); 2327 2328 status = resp->data[0]; 2329 2330 /* Prepare for the next round */ 2331 if (skb_queue_len(&dev->fragment_skb) > 0) { 2332 queue_work(dev->wq, &dev->mi_tm_tx_work); 2333 return -EINPROGRESS; 2334 } 2335 dev_kfree_skb(resp); 2336 2337 if (status != 0) { 2338 nfc_tm_deactivated(dev->nfc_dev); 2339 2340 dev->tgt_mode = 0; 2341 2342 return 0; 2343 } 2344 2345 queue_work(dev->wq, &dev->tg_work); 2346 2347 return 0; 2348 } 2349 2350 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) 2351 { 2352 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2353 int rc; 2354 2355 /* let's split in multiple chunks if size's too big */ 2356 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { 2357 rc = pn533_fill_fragment_skbs(dev, skb); 2358 if (rc <= 0) 2359 goto error; 2360 2361 /* get the first skb */ 2362 skb = skb_dequeue(&dev->fragment_skb); 2363 if (!skb) { 2364 rc = -EIO; 2365 goto error; 2366 } 2367 2368 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb, 2369 pn533_tm_send_complete, NULL); 2370 } else { 2371 /* Send th skb */ 2372 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb, 2373 pn533_tm_send_complete, NULL); 2374 } 2375 2376 error: 2377 if (rc < 0) { 2378 dev_kfree_skb(skb); 2379 skb_queue_purge(&dev->fragment_skb); 2380 } 2381 2382 return rc; 2383 } 2384 2385 static void pn533_wq_mi_recv(struct work_struct *work) 2386 { 2387 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work); 2388 struct sk_buff *skb; 2389 int rc; 2390 2391 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN); 2392 if (!skb) 2393 goto error; 2394 2395 switch (dev->device_type) { 2396 case PN533_DEVICE_PASORI: 2397 if (dev->tgt_active_prot == NFC_PROTO_FELICA) { 2398 rc = pn533_send_cmd_direct_async(dev, 2399 PN533_CMD_IN_COMM_THRU, 2400 skb, 2401 pn533_data_exchange_complete, 2402 dev->cmd_complete_mi_arg); 2403 2404 break; 2405 } 2406 fallthrough; 2407 default: 2408 skb_put_u8(skb, 1); /*TG*/ 2409 2410 rc = pn533_send_cmd_direct_async(dev, 2411 PN533_CMD_IN_DATA_EXCHANGE, 2412 skb, 2413 pn533_data_exchange_complete, 2414 dev->cmd_complete_mi_arg); 2415 2416 break; 2417 } 2418 2419 if (rc == 0) /* success */ 2420 return; 2421 2422 nfc_err(dev->dev, 2423 "Error %d when trying to perform data_exchange\n", rc); 2424 2425 dev_kfree_skb(skb); 2426 kfree(dev->cmd_complete_mi_arg); 2427 2428 error: 2429 dev->phy_ops->send_ack(dev, GFP_KERNEL); 2430 queue_work(dev->wq, &dev->cmd_work); 2431 } 2432 2433 static void pn533_wq_mi_send(struct work_struct *work) 2434 { 2435 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work); 2436 struct sk_buff *skb; 2437 int rc; 2438 2439 /* Grab the first skb in the queue */ 2440 skb = skb_dequeue(&dev->fragment_skb); 2441 2442 if (skb == NULL) { /* No more data */ 2443 /* Reset the queue for future use */ 2444 skb_queue_head_init(&dev->fragment_skb); 2445 goto error; 2446 } 2447 2448 switch (dev->device_type) { 2449 case PN533_DEVICE_PASORI: 2450 if (dev->tgt_active_prot != NFC_PROTO_FELICA) { 2451 rc = -EIO; 2452 break; 2453 } 2454 2455 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU, 2456 skb, 2457 pn533_data_exchange_complete, 2458 dev->cmd_complete_dep_arg); 2459 2460 break; 2461 2462 default: 2463 /* Still some fragments? */ 2464 rc = pn533_send_cmd_direct_async(dev, 2465 PN533_CMD_IN_DATA_EXCHANGE, 2466 skb, 2467 pn533_data_exchange_complete, 2468 dev->cmd_complete_dep_arg); 2469 2470 break; 2471 } 2472 2473 if (rc == 0) /* success */ 2474 return; 2475 2476 nfc_err(dev->dev, 2477 "Error %d when trying to perform data_exchange\n", rc); 2478 2479 dev_kfree_skb(skb); 2480 kfree(dev->cmd_complete_dep_arg); 2481 2482 error: 2483 dev->phy_ops->send_ack(dev, GFP_KERNEL); 2484 queue_work(dev->wq, &dev->cmd_work); 2485 } 2486 2487 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata, 2488 u8 cfgdata_len) 2489 { 2490 struct sk_buff *skb; 2491 struct sk_buff *resp; 2492 int skb_len; 2493 2494 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */ 2495 2496 skb = pn533_alloc_skb(dev, skb_len); 2497 if (!skb) 2498 return -ENOMEM; 2499 2500 skb_put_u8(skb, cfgitem); 2501 skb_put_data(skb, cfgdata, cfgdata_len); 2502 2503 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb); 2504 if (IS_ERR(resp)) 2505 return PTR_ERR(resp); 2506 2507 dev_kfree_skb(resp); 2508 return 0; 2509 } 2510 2511 static int pn533_get_firmware_version(struct pn533 *dev, 2512 struct pn533_fw_version *fv) 2513 { 2514 struct sk_buff *skb; 2515 struct sk_buff *resp; 2516 2517 skb = pn533_alloc_skb(dev, 0); 2518 if (!skb) 2519 return -ENOMEM; 2520 2521 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb); 2522 if (IS_ERR(resp)) 2523 return PTR_ERR(resp); 2524 2525 fv->ic = resp->data[0]; 2526 fv->ver = resp->data[1]; 2527 fv->rev = resp->data[2]; 2528 fv->support = resp->data[3]; 2529 2530 dev_kfree_skb(resp); 2531 return 0; 2532 } 2533 2534 static int pn533_pasori_fw_reset(struct pn533 *dev) 2535 { 2536 struct sk_buff *skb; 2537 struct sk_buff *resp; 2538 2539 skb = pn533_alloc_skb(dev, sizeof(u8)); 2540 if (!skb) 2541 return -ENOMEM; 2542 2543 skb_put_u8(skb, 0x1); 2544 2545 resp = pn533_send_cmd_sync(dev, 0x18, skb); 2546 if (IS_ERR(resp)) 2547 return PTR_ERR(resp); 2548 2549 dev_kfree_skb(resp); 2550 2551 return 0; 2552 } 2553 2554 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf) 2555 { 2556 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2557 u8 rf_field = !!rf; 2558 int rc; 2559 2560 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA; 2561 2562 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD, 2563 (u8 *)&rf_field, 1); 2564 if (rc) { 2565 nfc_err(dev->dev, "Error on setting RF field\n"); 2566 return rc; 2567 } 2568 2569 return 0; 2570 } 2571 2572 static int pn532_sam_configuration(struct nfc_dev *nfc_dev) 2573 { 2574 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2575 struct sk_buff *skb; 2576 struct sk_buff *resp; 2577 2578 skb = pn533_alloc_skb(dev, 1); 2579 if (!skb) 2580 return -ENOMEM; 2581 2582 skb_put_u8(skb, 0x01); 2583 2584 resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb); 2585 if (IS_ERR(resp)) 2586 return PTR_ERR(resp); 2587 2588 dev_kfree_skb(resp); 2589 return 0; 2590 } 2591 2592 static int pn533_dev_up(struct nfc_dev *nfc_dev) 2593 { 2594 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2595 int rc; 2596 2597 if (dev->phy_ops->dev_up) { 2598 rc = dev->phy_ops->dev_up(dev); 2599 if (rc) 2600 return rc; 2601 } 2602 2603 if ((dev->device_type == PN533_DEVICE_PN532) || 2604 (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) { 2605 rc = pn532_sam_configuration(nfc_dev); 2606 2607 if (rc) 2608 return rc; 2609 } 2610 2611 return pn533_rf_field(nfc_dev, 1); 2612 } 2613 2614 static int pn533_dev_down(struct nfc_dev *nfc_dev) 2615 { 2616 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2617 int ret; 2618 2619 ret = pn533_rf_field(nfc_dev, 0); 2620 if (dev->phy_ops->dev_down && !ret) 2621 ret = dev->phy_ops->dev_down(dev); 2622 2623 return ret; 2624 } 2625 2626 static struct nfc_ops pn533_nfc_ops = { 2627 .dev_up = pn533_dev_up, 2628 .dev_down = pn533_dev_down, 2629 .dep_link_up = pn533_dep_link_up, 2630 .dep_link_down = pn533_dep_link_down, 2631 .start_poll = pn533_start_poll, 2632 .stop_poll = pn533_stop_poll, 2633 .activate_target = pn533_activate_target, 2634 .deactivate_target = pn533_deactivate_target, 2635 .im_transceive = pn533_transceive, 2636 .tm_send = pn533_tm_send, 2637 }; 2638 2639 static int pn533_setup(struct pn533 *dev) 2640 { 2641 struct pn533_config_max_retries max_retries; 2642 struct pn533_config_timing timing; 2643 u8 pasori_cfg[3] = {0x08, 0x01, 0x08}; 2644 int rc; 2645 2646 switch (dev->device_type) { 2647 case PN533_DEVICE_STD: 2648 case PN533_DEVICE_PASORI: 2649 case PN533_DEVICE_ACR122U: 2650 case PN533_DEVICE_PN532: 2651 case PN533_DEVICE_PN532_AUTOPOLL: 2652 max_retries.mx_rty_atr = 0x2; 2653 max_retries.mx_rty_psl = 0x1; 2654 max_retries.mx_rty_passive_act = 2655 PN533_CONFIG_MAX_RETRIES_NO_RETRY; 2656 2657 timing.rfu = PN533_CONFIG_TIMING_102; 2658 timing.atr_res_timeout = PN533_CONFIG_TIMING_102; 2659 timing.dep_timeout = PN533_CONFIG_TIMING_204; 2660 2661 break; 2662 2663 default: 2664 nfc_err(dev->dev, "Unknown device type %d\n", 2665 dev->device_type); 2666 return -EINVAL; 2667 } 2668 2669 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES, 2670 (u8 *)&max_retries, sizeof(max_retries)); 2671 if (rc) { 2672 nfc_err(dev->dev, 2673 "Error on setting MAX_RETRIES config\n"); 2674 return rc; 2675 } 2676 2677 2678 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING, 2679 (u8 *)&timing, sizeof(timing)); 2680 if (rc) { 2681 nfc_err(dev->dev, "Error on setting RF timings\n"); 2682 return rc; 2683 } 2684 2685 switch (dev->device_type) { 2686 case PN533_DEVICE_STD: 2687 case PN533_DEVICE_PN532: 2688 case PN533_DEVICE_PN532_AUTOPOLL: 2689 break; 2690 2691 case PN533_DEVICE_PASORI: 2692 pn533_pasori_fw_reset(dev); 2693 2694 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI, 2695 pasori_cfg, 3); 2696 if (rc) { 2697 nfc_err(dev->dev, 2698 "Error while settings PASORI config\n"); 2699 return rc; 2700 } 2701 2702 pn533_pasori_fw_reset(dev); 2703 2704 break; 2705 } 2706 2707 return 0; 2708 } 2709 2710 int pn533_finalize_setup(struct pn533 *dev) 2711 { 2712 2713 struct pn533_fw_version fw_ver; 2714 int rc; 2715 2716 memset(&fw_ver, 0, sizeof(fw_ver)); 2717 2718 rc = pn533_get_firmware_version(dev, &fw_ver); 2719 if (rc) { 2720 nfc_err(dev->dev, "Unable to get FW version\n"); 2721 return rc; 2722 } 2723 2724 nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n", 2725 fw_ver.ic, fw_ver.ver, fw_ver.rev); 2726 2727 rc = pn533_setup(dev); 2728 if (rc) 2729 return rc; 2730 2731 return 0; 2732 } 2733 EXPORT_SYMBOL_GPL(pn533_finalize_setup); 2734 2735 struct pn533 *pn53x_common_init(u32 device_type, 2736 enum pn533_protocol_type protocol_type, 2737 void *phy, 2738 struct pn533_phy_ops *phy_ops, 2739 struct pn533_frame_ops *fops, 2740 struct device *dev) 2741 { 2742 struct pn533 *priv; 2743 2744 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 2745 if (!priv) 2746 return ERR_PTR(-ENOMEM); 2747 2748 priv->phy = phy; 2749 priv->phy_ops = phy_ops; 2750 priv->dev = dev; 2751 if (fops != NULL) 2752 priv->ops = fops; 2753 else 2754 priv->ops = &pn533_std_frame_ops; 2755 2756 priv->protocol_type = protocol_type; 2757 priv->device_type = device_type; 2758 2759 mutex_init(&priv->cmd_lock); 2760 2761 INIT_WORK(&priv->cmd_work, pn533_wq_cmd); 2762 INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete); 2763 INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv); 2764 INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send); 2765 INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data); 2766 INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv); 2767 INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send); 2768 INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll); 2769 INIT_WORK(&priv->rf_work, pn533_wq_rf); 2770 priv->wq = alloc_ordered_workqueue("pn533", 0); 2771 if (priv->wq == NULL) 2772 goto error; 2773 2774 timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0); 2775 2776 skb_queue_head_init(&priv->resp_q); 2777 skb_queue_head_init(&priv->fragment_skb); 2778 2779 INIT_LIST_HEAD(&priv->cmd_queue); 2780 return priv; 2781 2782 error: 2783 kfree(priv); 2784 return ERR_PTR(-ENOMEM); 2785 } 2786 EXPORT_SYMBOL_GPL(pn53x_common_init); 2787 2788 void pn53x_common_clean(struct pn533 *priv) 2789 { 2790 struct pn533_cmd *cmd, *n; 2791 2792 flush_delayed_work(&priv->poll_work); 2793 destroy_workqueue(priv->wq); 2794 2795 skb_queue_purge(&priv->resp_q); 2796 2797 del_timer(&priv->listen_timer); 2798 2799 list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) { 2800 list_del(&cmd->queue); 2801 kfree(cmd); 2802 } 2803 2804 kfree(priv); 2805 } 2806 EXPORT_SYMBOL_GPL(pn53x_common_clean); 2807 2808 int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols, 2809 struct device *parent) 2810 { 2811 priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols, 2812 priv->ops->tx_header_len + 2813 PN533_CMD_DATAEXCH_HEAD_LEN, 2814 priv->ops->tx_tail_len); 2815 if (!priv->nfc_dev) 2816 return -ENOMEM; 2817 2818 nfc_set_parent_dev(priv->nfc_dev, parent); 2819 nfc_set_drvdata(priv->nfc_dev, priv); 2820 return 0; 2821 } 2822 EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc); 2823 2824 int pn53x_register_nfc(struct pn533 *priv, u32 protocols, 2825 struct device *parent) 2826 { 2827 int rc; 2828 2829 rc = pn532_i2c_nfc_alloc(priv, protocols, parent); 2830 if (rc) 2831 return rc; 2832 2833 rc = nfc_register_device(priv->nfc_dev); 2834 if (rc) 2835 nfc_free_device(priv->nfc_dev); 2836 2837 return rc; 2838 } 2839 EXPORT_SYMBOL_GPL(pn53x_register_nfc); 2840 2841 void pn53x_unregister_nfc(struct pn533 *priv) 2842 { 2843 nfc_unregister_device(priv->nfc_dev); 2844 nfc_free_device(priv->nfc_dev); 2845 } 2846 EXPORT_SYMBOL_GPL(pn53x_unregister_nfc); 2847 2848 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>"); 2849 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>"); 2850 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>"); 2851 MODULE_DESCRIPTION("PN533 driver ver " VERSION); 2852 MODULE_VERSION(VERSION); 2853 MODULE_LICENSE("GPL"); 2854