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_cmd_frame(struct pn533 *dev, struct pn533_cmd *cmd) 438 { 439 struct sk_buff *req = cmd->req; 440 int rc; 441 442 skb_get(req); 443 dev->cmd = cmd; 444 rc = dev->phy_ops->send_frame(dev, req); 445 dev_kfree_skb(req); 446 return rc; 447 } 448 449 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code, 450 struct sk_buff *req, 451 pn533_send_async_complete_t complete_cb, 452 void *complete_cb_context) 453 { 454 struct pn533_cmd *cmd; 455 int rc = 0; 456 457 dev_dbg(dev->dev, "Sending command 0x%x\n", cmd_code); 458 459 cmd = kzalloc_obj(*cmd); 460 if (!cmd) 461 return -ENOMEM; 462 463 cmd->code = cmd_code; 464 cmd->req = req; 465 cmd->complete_cb = complete_cb; 466 cmd->complete_cb_context = complete_cb_context; 467 468 pn533_build_cmd_frame(dev, cmd_code, req); 469 470 mutex_lock(&dev->cmd_lock); 471 472 if (!dev->cmd_pending) { 473 rc = pn533_send_cmd_frame(dev, cmd); 474 if (rc) { 475 dev->cmd = NULL; 476 goto error; 477 } 478 479 dev->cmd_pending = 1; 480 goto unlock; 481 } 482 483 dev_dbg(dev->dev, "%s Queueing command 0x%x\n", 484 __func__, cmd_code); 485 486 INIT_LIST_HEAD(&cmd->queue); 487 list_add_tail(&cmd->queue, &dev->cmd_queue); 488 489 goto unlock; 490 491 error: 492 kfree(cmd); 493 unlock: 494 mutex_unlock(&dev->cmd_lock); 495 return rc; 496 } 497 498 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code, 499 struct sk_buff *req, 500 pn533_send_async_complete_t complete_cb, 501 void *complete_cb_context) 502 { 503 return __pn533_send_async(dev, cmd_code, req, complete_cb, 504 complete_cb_context); 505 } 506 507 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code, 508 struct sk_buff *req, 509 pn533_send_async_complete_t complete_cb, 510 void *complete_cb_context) 511 { 512 return __pn533_send_async(dev, cmd_code, req, complete_cb, 513 complete_cb_context); 514 } 515 516 /* 517 * pn533_send_cmd_direct_async 518 * 519 * The function sends a priority cmd directly to the chip omitting the cmd 520 * queue. It's intended to be used by chaining mechanism of received responses 521 * where the host has to request every single chunk of data before scheduling 522 * next cmd from the queue. 523 */ 524 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code, 525 struct sk_buff *req, 526 pn533_send_async_complete_t complete_cb, 527 void *complete_cb_context) 528 { 529 struct pn533_cmd *cmd; 530 int rc; 531 532 cmd = kzalloc_obj(*cmd); 533 if (!cmd) 534 return -ENOMEM; 535 536 cmd->code = cmd_code; 537 cmd->req = req; 538 cmd->complete_cb = complete_cb; 539 cmd->complete_cb_context = complete_cb_context; 540 541 pn533_build_cmd_frame(dev, cmd_code, req); 542 543 rc = pn533_send_cmd_frame(dev, cmd); 544 if (rc < 0) { 545 dev->cmd = NULL; 546 kfree(cmd); 547 } 548 549 return rc; 550 } 551 552 static void pn533_wq_cmd_complete(struct work_struct *work) 553 { 554 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work); 555 int rc; 556 557 rc = pn533_send_async_complete(dev); 558 if (rc != -EINPROGRESS) 559 queue_work(dev->wq, &dev->cmd_work); 560 } 561 562 static void pn533_wq_cmd(struct work_struct *work) 563 { 564 struct pn533 *dev = container_of(work, struct pn533, cmd_work); 565 struct pn533_cmd *cmd; 566 int rc; 567 568 mutex_lock(&dev->cmd_lock); 569 570 if (list_empty(&dev->cmd_queue)) { 571 dev->cmd_pending = 0; 572 mutex_unlock(&dev->cmd_lock); 573 return; 574 } 575 576 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue); 577 578 list_del(&cmd->queue); 579 580 mutex_unlock(&dev->cmd_lock); 581 582 rc = pn533_send_cmd_frame(dev, cmd); 583 if (rc < 0) { 584 dev->cmd = NULL; 585 dev_kfree_skb(cmd->req); 586 kfree(cmd); 587 return; 588 } 589 590 } 591 592 struct pn533_sync_cmd_response { 593 struct sk_buff *resp; 594 struct completion done; 595 }; 596 597 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg, 598 struct sk_buff *resp) 599 { 600 struct pn533_sync_cmd_response *arg = _arg; 601 602 arg->resp = resp; 603 complete(&arg->done); 604 605 return 0; 606 } 607 608 /* pn533_send_cmd_sync 609 * 610 * Please note the req parameter is freed inside the function to 611 * limit a number of return value interpretations by the caller. 612 * 613 * 1. negative in case of error during TX path -> req should be freed 614 * 615 * 2. negative in case of error during RX path -> req should not be freed 616 * as it's been already freed at the beginning of RX path by 617 * async_complete_cb. 618 * 619 * 3. valid pointer in case of successful RX path 620 * 621 * A caller has to check a return value with IS_ERR macro. If the test pass, 622 * the returned pointer is valid. 623 * 624 */ 625 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code, 626 struct sk_buff *req) 627 { 628 int rc; 629 struct pn533_sync_cmd_response arg; 630 631 init_completion(&arg.done); 632 633 rc = pn533_send_cmd_async(dev, cmd_code, req, 634 pn533_send_sync_complete, &arg); 635 if (rc) { 636 dev_kfree_skb(req); 637 return ERR_PTR(rc); 638 } 639 640 wait_for_completion(&arg.done); 641 642 return arg.resp; 643 } 644 645 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size) 646 { 647 struct sk_buff *skb; 648 649 skb = alloc_skb(dev->ops->tx_header_len + 650 size + 651 dev->ops->tx_tail_len, GFP_KERNEL); 652 653 if (skb) 654 skb_reserve(skb, dev->ops->tx_header_len); 655 656 return skb; 657 } 658 659 struct pn533_target_type_a { 660 __be16 sens_res; 661 u8 sel_res; 662 u8 nfcid_len; 663 u8 nfcid_data[]; 664 } __packed; 665 666 667 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6)) 668 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0)) 669 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8)) 670 671 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00 672 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C 673 674 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5) 675 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2) 676 677 #define PN533_TYPE_A_SEL_PROT_MIFARE 0 678 #define PN533_TYPE_A_SEL_PROT_ISO14443 1 679 #define PN533_TYPE_A_SEL_PROT_DEP 2 680 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3 681 682 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a, 683 int target_data_len) 684 { 685 u8 ssd; 686 u8 platconf; 687 688 if (target_data_len < sizeof(struct pn533_target_type_a)) 689 return false; 690 691 /* 692 * The length check of nfcid[] and ats[] are not being performed because 693 * the values are not being used 694 */ 695 696 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ 697 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res); 698 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res); 699 700 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && 701 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || 702 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && 703 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) 704 return false; 705 706 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */ 707 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0) 708 return false; 709 710 if (type_a->nfcid_len > NFC_NFCID1_MAXSIZE) 711 return false; 712 713 return true; 714 } 715 716 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data, 717 int tgt_data_len) 718 { 719 struct pn533_target_type_a *tgt_type_a; 720 721 tgt_type_a = (struct pn533_target_type_a *)tgt_data; 722 723 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len)) 724 return -EPROTO; 725 726 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) { 727 case PN533_TYPE_A_SEL_PROT_MIFARE: 728 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK; 729 break; 730 case PN533_TYPE_A_SEL_PROT_ISO14443: 731 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK; 732 break; 733 case PN533_TYPE_A_SEL_PROT_DEP: 734 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; 735 break; 736 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP: 737 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK | 738 NFC_PROTO_NFC_DEP_MASK; 739 break; 740 } 741 742 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res); 743 nfc_tgt->sel_res = tgt_type_a->sel_res; 744 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len; 745 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len); 746 747 return 0; 748 } 749 750 struct pn533_target_felica { 751 u8 pol_res; 752 struct_group(sensf_res, 753 u8 opcode; 754 u8 nfcid2[NFC_NFCID2_MAXSIZE]; 755 ); 756 u8 pad[8]; 757 /* optional */ 758 u8 syst_code[]; 759 } __packed; 760 761 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01 762 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE 763 764 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica, 765 int target_data_len) 766 { 767 if (target_data_len < sizeof(struct pn533_target_felica)) 768 return false; 769 770 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES) 771 return false; 772 773 return true; 774 } 775 776 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data, 777 int tgt_data_len) 778 { 779 struct pn533_target_felica *tgt_felica; 780 781 tgt_felica = (struct pn533_target_felica *)tgt_data; 782 783 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len)) 784 return -EPROTO; 785 786 if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) && 787 (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2)) 788 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK; 789 else 790 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK; 791 792 memcpy(nfc_tgt->sensf_res, &tgt_felica->sensf_res, sizeof(tgt_felica->sensf_res)); 793 nfc_tgt->sensf_res_len = sizeof(tgt_felica->sensf_res); 794 795 memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE); 796 nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE; 797 798 return 0; 799 } 800 801 struct pn533_target_jewel { 802 __be16 sens_res; 803 u8 jewelid[4]; 804 } __packed; 805 806 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel, 807 int target_data_len) 808 { 809 u8 ssd; 810 u8 platconf; 811 812 if (target_data_len < sizeof(struct pn533_target_jewel)) 813 return false; 814 815 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */ 816 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res); 817 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res); 818 819 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL && 820 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) || 821 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL && 822 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL)) 823 return false; 824 825 return true; 826 } 827 828 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data, 829 int tgt_data_len) 830 { 831 struct pn533_target_jewel *tgt_jewel; 832 833 tgt_jewel = (struct pn533_target_jewel *)tgt_data; 834 835 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len)) 836 return -EPROTO; 837 838 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK; 839 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res); 840 nfc_tgt->nfcid1_len = 4; 841 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len); 842 843 return 0; 844 } 845 846 struct pn533_type_b_prot_info { 847 u8 bitrate; 848 u8 fsci_type; 849 u8 fwi_adc_fo; 850 } __packed; 851 852 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4) 853 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0) 854 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8 855 856 struct pn533_type_b_sens_res { 857 u8 opcode; 858 u8 nfcid[4]; 859 u8 appdata[4]; 860 struct pn533_type_b_prot_info prot_info; 861 } __packed; 862 863 #define PN533_TYPE_B_OPC_SENSB_RES 0x50 864 865 struct pn533_target_type_b { 866 struct pn533_type_b_sens_res sensb_res; 867 u8 attrib_res_len; 868 u8 attrib_res[]; 869 } __packed; 870 871 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b, 872 int target_data_len) 873 { 874 if (target_data_len < sizeof(struct pn533_target_type_b)) 875 return false; 876 877 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES) 878 return false; 879 880 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) & 881 PN533_TYPE_B_PROT_TYPE_RFU_MASK) 882 return false; 883 884 return true; 885 } 886 887 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data, 888 int tgt_data_len) 889 { 890 struct pn533_target_type_b *tgt_type_b; 891 892 tgt_type_b = (struct pn533_target_type_b *)tgt_data; 893 894 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len)) 895 return -EPROTO; 896 897 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK; 898 899 return 0; 900 } 901 902 static void pn533_poll_reset_mod_list(struct pn533 *dev); 903 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata, 904 int tgdata_len) 905 { 906 struct nfc_target nfc_tgt; 907 int rc; 908 909 dev_dbg(dev->dev, "%s: modulation=%d\n", 910 __func__, dev->poll_mod_curr); 911 912 if (tg != 1) 913 return -EPROTO; 914 915 memset(&nfc_tgt, 0, sizeof(struct nfc_target)); 916 917 switch (dev->poll_mod_curr) { 918 case PN533_POLL_MOD_106KBPS_A: 919 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len); 920 break; 921 case PN533_POLL_MOD_212KBPS_FELICA: 922 case PN533_POLL_MOD_424KBPS_FELICA: 923 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len); 924 break; 925 case PN533_POLL_MOD_106KBPS_JEWEL: 926 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len); 927 break; 928 case PN533_POLL_MOD_847KBPS_B: 929 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len); 930 break; 931 default: 932 nfc_err(dev->dev, 933 "Unknown current poll modulation\n"); 934 return -EPROTO; 935 } 936 937 if (rc) 938 return rc; 939 940 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) { 941 dev_dbg(dev->dev, 942 "The Tg found doesn't have the desired protocol\n"); 943 return -EAGAIN; 944 } 945 946 dev_dbg(dev->dev, 947 "Target found - supported protocols: 0x%x\n", 948 nfc_tgt.supported_protocols); 949 950 dev->tgt_available_prots = nfc_tgt.supported_protocols; 951 952 pn533_poll_reset_mod_list(dev); 953 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1); 954 955 return 0; 956 } 957 958 static inline void pn533_poll_next_mod(struct pn533 *dev) 959 { 960 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count; 961 } 962 963 static void pn533_poll_reset_mod_list(struct pn533 *dev) 964 { 965 dev->poll_mod_count = 0; 966 } 967 968 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index) 969 { 970 dev->poll_mod_active[dev->poll_mod_count] = 971 (struct pn533_poll_modulations *)&poll_mod[mod_index]; 972 dev->poll_mod_count++; 973 } 974 975 static void pn533_poll_create_mod_list(struct pn533 *dev, 976 u32 im_protocols, u32 tm_protocols) 977 { 978 pn533_poll_reset_mod_list(dev); 979 980 if ((im_protocols & NFC_PROTO_MIFARE_MASK) || 981 (im_protocols & NFC_PROTO_ISO14443_MASK) || 982 (im_protocols & NFC_PROTO_NFC_DEP_MASK)) 983 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A); 984 985 if (im_protocols & NFC_PROTO_FELICA_MASK || 986 im_protocols & NFC_PROTO_NFC_DEP_MASK) { 987 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA); 988 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA); 989 } 990 991 if (im_protocols & NFC_PROTO_JEWEL_MASK) 992 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL); 993 994 if (im_protocols & NFC_PROTO_ISO14443_B_MASK) 995 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B); 996 997 if (tm_protocols) 998 pn533_poll_add_mod(dev, PN533_LISTEN_MOD); 999 } 1000 1001 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp) 1002 { 1003 u8 nbtg, tg, *tgdata; 1004 int rc, tgdata_len; 1005 1006 /* Toggle the DEP polling */ 1007 if (dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) 1008 dev->poll_dep = 1; 1009 1010 nbtg = resp->data[0]; 1011 tg = resp->data[1]; 1012 tgdata = &resp->data[2]; 1013 tgdata_len = resp->len - 2; /* nbtg + tg */ 1014 1015 if (nbtg) { 1016 rc = pn533_target_found(dev, tg, tgdata, tgdata_len); 1017 1018 /* We must stop the poll after a valid target found */ 1019 if (rc == 0) 1020 return 0; 1021 } 1022 1023 return -EAGAIN; 1024 } 1025 1026 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev) 1027 { 1028 struct sk_buff *skb; 1029 u8 *felica, *nfcid3; 1030 1031 u8 *gbytes = dev->gb; 1032 size_t gbytes_len = dev->gb_len; 1033 1034 u8 felica_params[18] = {0x1, 0xfe, /* DEP */ 1035 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */ 1036 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 1037 0xff, 0xff}; /* System code */ 1038 1039 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */ 1040 0x0, 0x0, 0x0, 1041 0x40}; /* SEL_RES for DEP */ 1042 1043 unsigned int skb_len = 36 + /* 1044 * mode (1), mifare (6), 1045 * felica (18), nfcid3 (10), gb_len (1) 1046 */ 1047 gbytes_len + 1048 1; /* len Tk*/ 1049 1050 skb = pn533_alloc_skb(dev, skb_len); 1051 if (!skb) 1052 return NULL; 1053 1054 /* DEP support only */ 1055 skb_put_u8(skb, PN533_INIT_TARGET_DEP); 1056 1057 /* MIFARE params */ 1058 skb_put_data(skb, mifare_params, 6); 1059 1060 /* Felica params */ 1061 felica = skb_put_data(skb, felica_params, 18); 1062 get_random_bytes(felica + 2, 6); 1063 1064 /* NFCID3 */ 1065 nfcid3 = skb_put_zero(skb, 10); 1066 memcpy(nfcid3, felica, 8); 1067 1068 /* General bytes */ 1069 skb_put_u8(skb, gbytes_len); 1070 1071 skb_put_data(skb, gbytes, gbytes_len); 1072 1073 /* Len Tk */ 1074 skb_put_u8(skb, 0); 1075 1076 return skb; 1077 } 1078 1079 static void pn533_wq_tm_mi_recv(struct work_struct *work); 1080 static struct sk_buff *pn533_build_response(struct pn533 *dev); 1081 1082 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg, 1083 struct sk_buff *resp) 1084 { 1085 struct sk_buff *skb; 1086 u8 status, ret, mi; 1087 int rc; 1088 1089 if (IS_ERR(resp)) { 1090 skb_queue_purge(&dev->resp_q); 1091 return PTR_ERR(resp); 1092 } 1093 1094 status = resp->data[0]; 1095 1096 ret = status & PN533_CMD_RET_MASK; 1097 mi = status & PN533_CMD_MI_MASK; 1098 1099 skb_pull(resp, sizeof(status)); 1100 1101 if (ret != PN533_CMD_RET_SUCCESS) { 1102 rc = -EIO; 1103 goto error; 1104 } 1105 1106 skb_queue_tail(&dev->resp_q, resp); 1107 1108 if (mi) { 1109 queue_work(dev->wq, &dev->mi_tm_rx_work); 1110 return -EINPROGRESS; 1111 } 1112 1113 skb = pn533_build_response(dev); 1114 if (!skb) { 1115 rc = -EIO; 1116 goto error; 1117 } 1118 1119 return nfc_tm_data_received(dev->nfc_dev, skb); 1120 1121 error: 1122 nfc_tm_deactivated(dev->nfc_dev); 1123 dev->tgt_mode = 0; 1124 skb_queue_purge(&dev->resp_q); 1125 dev_kfree_skb(resp); 1126 1127 return rc; 1128 } 1129 1130 static void pn533_wq_tm_mi_recv(struct work_struct *work) 1131 { 1132 struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work); 1133 struct sk_buff *skb; 1134 int rc; 1135 1136 skb = pn533_alloc_skb(dev, 0); 1137 if (!skb) 1138 return; 1139 1140 rc = pn533_send_cmd_direct_async(dev, 1141 PN533_CMD_TG_GET_DATA, 1142 skb, 1143 pn533_tm_get_data_complete, 1144 NULL); 1145 1146 if (rc < 0) 1147 dev_kfree_skb(skb); 1148 } 1149 1150 static int pn533_tm_send_complete(struct pn533 *dev, void *arg, 1151 struct sk_buff *resp); 1152 static void pn533_wq_tm_mi_send(struct work_struct *work) 1153 { 1154 struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work); 1155 struct sk_buff *skb; 1156 int rc; 1157 1158 /* Grab the first skb in the queue */ 1159 skb = skb_dequeue(&dev->fragment_skb); 1160 if (skb == NULL) { /* No more data */ 1161 /* Reset the queue for future use */ 1162 skb_queue_head_init(&dev->fragment_skb); 1163 goto error; 1164 } 1165 1166 /* last entry - remove MI bit */ 1167 if (skb_queue_len(&dev->fragment_skb) == 0) { 1168 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA, 1169 skb, pn533_tm_send_complete, NULL); 1170 } else 1171 rc = pn533_send_cmd_direct_async(dev, 1172 PN533_CMD_TG_SET_META_DATA, 1173 skb, pn533_tm_send_complete, NULL); 1174 1175 if (rc == 0) /* success */ 1176 return; 1177 1178 dev_err(dev->dev, 1179 "Error %d when trying to perform set meta data_exchange", rc); 1180 1181 dev_kfree_skb(skb); 1182 1183 error: 1184 dev->phy_ops->send_ack(dev, GFP_KERNEL); 1185 queue_work(dev->wq, &dev->cmd_work); 1186 } 1187 1188 static void pn533_wq_tg_get_data(struct work_struct *work) 1189 { 1190 struct pn533 *dev = container_of(work, struct pn533, tg_work); 1191 struct sk_buff *skb; 1192 int rc; 1193 1194 skb = pn533_alloc_skb(dev, 0); 1195 if (!skb) 1196 return; 1197 1198 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb, 1199 pn533_tm_get_data_complete, NULL); 1200 1201 if (rc < 0) 1202 dev_kfree_skb(skb); 1203 } 1204 1205 #define ATR_REQ_GB_OFFSET 17 1206 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp) 1207 { 1208 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb; 1209 size_t gb_len; 1210 int rc; 1211 1212 if (resp->len < ATR_REQ_GB_OFFSET + 1) 1213 return -EINVAL; 1214 1215 mode = resp->data[0]; 1216 cmd = &resp->data[1]; 1217 1218 dev_dbg(dev->dev, "Target mode 0x%x len %d\n", 1219 mode, resp->len); 1220 1221 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) == 1222 PN533_INIT_TARGET_RESP_ACTIVE) 1223 comm_mode = NFC_COMM_ACTIVE; 1224 1225 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */ 1226 return -EOPNOTSUPP; 1227 1228 gb = cmd + ATR_REQ_GB_OFFSET; 1229 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1); 1230 1231 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK, 1232 comm_mode, gb, gb_len); 1233 if (rc < 0) { 1234 nfc_err(dev->dev, 1235 "Error when signaling target activation\n"); 1236 return rc; 1237 } 1238 1239 dev->tgt_mode = 1; 1240 queue_work(dev->wq, &dev->tg_work); 1241 1242 return 0; 1243 } 1244 1245 static void pn533_listen_mode_timer(struct timer_list *t) 1246 { 1247 struct pn533 *dev = timer_container_of(dev, t, listen_timer); 1248 1249 dev->cancel_listen = 1; 1250 1251 pn533_poll_next_mod(dev); 1252 1253 queue_delayed_work(dev->wq, &dev->poll_work, 1254 msecs_to_jiffies(PN533_POLL_INTERVAL)); 1255 } 1256 1257 static int pn533_rf_complete(struct pn533 *dev, void *arg, 1258 struct sk_buff *resp) 1259 { 1260 int rc = 0; 1261 1262 if (IS_ERR(resp)) { 1263 rc = PTR_ERR(resp); 1264 1265 nfc_err(dev->dev, "RF setting error %d\n", rc); 1266 1267 return rc; 1268 } 1269 1270 queue_delayed_work(dev->wq, &dev->poll_work, 1271 msecs_to_jiffies(PN533_POLL_INTERVAL)); 1272 1273 dev_kfree_skb(resp); 1274 return rc; 1275 } 1276 1277 static void pn533_wq_rf(struct work_struct *work) 1278 { 1279 struct pn533 *dev = container_of(work, struct pn533, rf_work); 1280 struct sk_buff *skb; 1281 int rc; 1282 1283 skb = pn533_alloc_skb(dev, 2); 1284 if (!skb) 1285 return; 1286 1287 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD); 1288 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA); 1289 1290 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb, 1291 pn533_rf_complete, NULL); 1292 if (rc < 0) { 1293 dev_kfree_skb(skb); 1294 nfc_err(dev->dev, "RF setting error %d\n", rc); 1295 } 1296 } 1297 1298 static int pn533_poll_dep_complete(struct pn533 *dev, void *arg, 1299 struct sk_buff *resp) 1300 { 1301 struct pn533_cmd_jump_dep_response *rsp; 1302 struct nfc_target nfc_target; 1303 u8 target_gt_len; 1304 int rc; 1305 1306 if (IS_ERR(resp)) 1307 return PTR_ERR(resp); 1308 1309 memset(&nfc_target, 0, sizeof(struct nfc_target)); 1310 1311 rsp = (struct pn533_cmd_jump_dep_response *)resp->data; 1312 1313 rc = rsp->status & PN533_CMD_RET_MASK; 1314 if (rc != PN533_CMD_RET_SUCCESS) { 1315 /* Not target found, turn radio off */ 1316 queue_work(dev->wq, &dev->rf_work); 1317 1318 dev_kfree_skb(resp); 1319 return 0; 1320 } 1321 1322 dev_dbg(dev->dev, "Creating new target"); 1323 1324 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK; 1325 nfc_target.nfcid1_len = 10; 1326 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len); 1327 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1); 1328 if (rc) 1329 goto error; 1330 1331 dev->tgt_available_prots = 0; 1332 dev->tgt_active_prot = NFC_PROTO_NFC_DEP; 1333 1334 /* ATR_RES general bytes are located at offset 17 */ 1335 target_gt_len = resp->len - 17; 1336 rc = nfc_set_remote_general_bytes(dev->nfc_dev, 1337 rsp->gt, target_gt_len); 1338 if (!rc) { 1339 rc = nfc_dep_link_is_up(dev->nfc_dev, 1340 dev->nfc_dev->targets[0].idx, 1341 0, NFC_RF_INITIATOR); 1342 1343 if (!rc) 1344 pn533_poll_reset_mod_list(dev); 1345 } 1346 error: 1347 dev_kfree_skb(resp); 1348 return rc; 1349 } 1350 1351 #define PASSIVE_DATA_LEN 5 1352 static int pn533_poll_dep(struct nfc_dev *nfc_dev) 1353 { 1354 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1355 struct sk_buff *skb; 1356 int rc, skb_len; 1357 u8 *next, nfcid3[NFC_NFCID3_MAXSIZE]; 1358 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3}; 1359 1360 if (!dev->gb) { 1361 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len); 1362 1363 if (!dev->gb || !dev->gb_len) { 1364 dev->poll_dep = 0; 1365 queue_work(dev->wq, &dev->rf_work); 1366 } 1367 } 1368 1369 skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */ 1370 skb_len += PASSIVE_DATA_LEN; 1371 1372 /* NFCID3 */ 1373 skb_len += NFC_NFCID3_MAXSIZE; 1374 nfcid3[0] = 0x1; 1375 nfcid3[1] = 0xfe; 1376 get_random_bytes(nfcid3 + 2, 6); 1377 1378 skb = pn533_alloc_skb(dev, skb_len); 1379 if (!skb) 1380 return -ENOMEM; 1381 1382 skb_put_u8(skb, 0x01); /* Active */ 1383 skb_put_u8(skb, 0x02); /* 424 kbps */ 1384 1385 next = skb_put(skb, 1); /* Next */ 1386 *next = 0; 1387 1388 /* Copy passive data */ 1389 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN); 1390 *next |= 1; 1391 1392 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */ 1393 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE); 1394 *next |= 2; 1395 1396 skb_put_data(skb, dev->gb, dev->gb_len); 1397 *next |= 4; /* We have some Gi */ 1398 1399 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb, 1400 pn533_poll_dep_complete, NULL); 1401 1402 if (rc < 0) 1403 dev_kfree_skb(skb); 1404 1405 return rc; 1406 } 1407 1408 static int pn533_autopoll_complete(struct pn533 *dev, void *arg, 1409 struct sk_buff *resp) 1410 { 1411 struct pn532_autopoll_resp *apr; 1412 struct nfc_target nfc_tgt; 1413 u8 nbtg; 1414 int rc; 1415 1416 if (IS_ERR(resp)) { 1417 rc = PTR_ERR(resp); 1418 1419 nfc_err(dev->dev, "%s autopoll complete error %d\n", 1420 __func__, rc); 1421 1422 if (rc == -ENOENT) { 1423 if (dev->poll_mod_count != 0) 1424 return rc; 1425 goto stop_poll; 1426 } 1427 nfc_err(dev->dev, "Error %d when running autopoll\n", rc); 1428 goto stop_poll; 1429 } 1430 1431 nbtg = resp->data[0]; 1432 if ((nbtg > 2) || (nbtg <= 0)) 1433 return -EAGAIN; 1434 1435 apr = (struct pn532_autopoll_resp *)&resp->data[1]; 1436 while (nbtg--) { 1437 memset(&nfc_tgt, 0, sizeof(struct nfc_target)); 1438 switch (apr->type) { 1439 case PN532_AUTOPOLL_TYPE_ISOA: 1440 dev_dbg(dev->dev, "ISOA\n"); 1441 rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata, 1442 apr->ln - 1); 1443 break; 1444 case PN532_AUTOPOLL_TYPE_FELICA212: 1445 case PN532_AUTOPOLL_TYPE_FELICA424: 1446 dev_dbg(dev->dev, "FELICA\n"); 1447 rc = pn533_target_found_felica(&nfc_tgt, apr->tgdata, 1448 apr->ln - 1); 1449 break; 1450 case PN532_AUTOPOLL_TYPE_JEWEL: 1451 dev_dbg(dev->dev, "JEWEL\n"); 1452 rc = pn533_target_found_jewel(&nfc_tgt, apr->tgdata, 1453 apr->ln - 1); 1454 break; 1455 case PN532_AUTOPOLL_TYPE_ISOB: 1456 dev_dbg(dev->dev, "ISOB\n"); 1457 rc = pn533_target_found_type_b(&nfc_tgt, apr->tgdata, 1458 apr->ln - 1); 1459 break; 1460 case PN532_AUTOPOLL_TYPE_MIFARE: 1461 dev_dbg(dev->dev, "Mifare\n"); 1462 rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata, 1463 apr->ln - 1); 1464 break; 1465 default: 1466 nfc_err(dev->dev, 1467 "Unknown current poll modulation\n"); 1468 rc = -EPROTO; 1469 } 1470 1471 if (rc) 1472 goto done; 1473 1474 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) { 1475 nfc_err(dev->dev, 1476 "The Tg found doesn't have the desired protocol\n"); 1477 rc = -EAGAIN; 1478 goto done; 1479 } 1480 1481 dev->tgt_available_prots = nfc_tgt.supported_protocols; 1482 apr = (struct pn532_autopoll_resp *) 1483 (apr->tgdata + (apr->ln - 1)); 1484 } 1485 1486 pn533_poll_reset_mod_list(dev); 1487 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1); 1488 1489 done: 1490 dev_kfree_skb(resp); 1491 return rc; 1492 1493 stop_poll: 1494 nfc_err(dev->dev, "autopoll operation has been stopped\n"); 1495 1496 pn533_poll_reset_mod_list(dev); 1497 dev->poll_protocols = 0; 1498 return rc; 1499 } 1500 1501 static int pn533_poll_complete(struct pn533 *dev, void *arg, 1502 struct sk_buff *resp) 1503 { 1504 struct pn533_poll_modulations *cur_mod; 1505 int rc; 1506 1507 if (IS_ERR(resp)) { 1508 rc = PTR_ERR(resp); 1509 1510 nfc_err(dev->dev, "%s Poll complete error %d\n", 1511 __func__, rc); 1512 1513 if (rc == -ENOENT) { 1514 if (dev->poll_mod_count != 0) 1515 return rc; 1516 goto stop_poll; 1517 } 1518 nfc_err(dev->dev, "Error %d when running poll\n", rc); 1519 goto stop_poll; 1520 } 1521 1522 cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; 1523 1524 if (cur_mod->len == 0) { /* Target mode */ 1525 timer_delete(&dev->listen_timer); 1526 rc = pn533_init_target_complete(dev, resp); 1527 goto done; 1528 } 1529 1530 /* Initiator mode */ 1531 rc = pn533_start_poll_complete(dev, resp); 1532 if (!rc) 1533 goto done; 1534 1535 if (!dev->poll_mod_count) { 1536 dev_dbg(dev->dev, "Polling has been stopped\n"); 1537 goto done; 1538 } 1539 1540 pn533_poll_next_mod(dev); 1541 /* Not target found, turn radio off */ 1542 queue_work(dev->wq, &dev->rf_work); 1543 1544 done: 1545 dev_kfree_skb(resp); 1546 return rc; 1547 1548 stop_poll: 1549 nfc_err(dev->dev, "Polling operation has been stopped\n"); 1550 1551 pn533_poll_reset_mod_list(dev); 1552 dev->poll_protocols = 0; 1553 return rc; 1554 } 1555 1556 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev, 1557 struct pn533_poll_modulations *mod) 1558 { 1559 struct sk_buff *skb; 1560 1561 skb = pn533_alloc_skb(dev, mod->len); 1562 if (!skb) 1563 return NULL; 1564 1565 skb_put_data(skb, &mod->data, mod->len); 1566 1567 return skb; 1568 } 1569 1570 static int pn533_send_poll_frame(struct pn533 *dev) 1571 { 1572 struct pn533_poll_modulations *mod; 1573 struct sk_buff *skb; 1574 int rc; 1575 u8 cmd_code; 1576 1577 mod = dev->poll_mod_active[dev->poll_mod_curr]; 1578 1579 dev_dbg(dev->dev, "%s mod len %d\n", 1580 __func__, mod->len); 1581 1582 if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep) { 1583 dev->poll_dep = 0; 1584 return pn533_poll_dep(dev->nfc_dev); 1585 } 1586 1587 if (mod->len == 0) { /* Listen mode */ 1588 cmd_code = PN533_CMD_TG_INIT_AS_TARGET; 1589 skb = pn533_alloc_poll_tg_frame(dev); 1590 } else { /* Polling mode */ 1591 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET; 1592 skb = pn533_alloc_poll_in_frame(dev, mod); 1593 } 1594 1595 if (!skb) { 1596 nfc_err(dev->dev, "Failed to allocate skb\n"); 1597 return -ENOMEM; 1598 } 1599 1600 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete, 1601 NULL); 1602 if (rc < 0) { 1603 dev_kfree_skb(skb); 1604 nfc_err(dev->dev, "Polling loop error %d\n", rc); 1605 } 1606 1607 return rc; 1608 } 1609 1610 static void pn533_wq_poll(struct work_struct *work) 1611 { 1612 struct pn533 *dev = container_of(work, struct pn533, poll_work.work); 1613 struct pn533_poll_modulations *cur_mod; 1614 int rc; 1615 1616 cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; 1617 1618 dev_dbg(dev->dev, 1619 "%s cancel_listen %d modulation len %d\n", 1620 __func__, dev->cancel_listen, cur_mod->len); 1621 1622 if (dev->cancel_listen == 1) { 1623 dev->cancel_listen = 0; 1624 dev->phy_ops->abort_cmd(dev, GFP_ATOMIC); 1625 } 1626 1627 rc = pn533_send_poll_frame(dev); 1628 if (rc) 1629 return; 1630 1631 if (cur_mod->len == 0 && dev->poll_mod_count > 1) 1632 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ); 1633 } 1634 1635 static int pn533_start_poll(struct nfc_dev *nfc_dev, 1636 u32 im_protocols, u32 tm_protocols) 1637 { 1638 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1639 struct pn533_poll_modulations *cur_mod; 1640 struct sk_buff *skb; 1641 u8 rand_mod; 1642 int rc; 1643 1644 dev_dbg(dev->dev, 1645 "%s: im protocols 0x%x tm protocols 0x%x\n", 1646 __func__, im_protocols, tm_protocols); 1647 1648 if (dev->tgt_active_prot) { 1649 nfc_err(dev->dev, 1650 "Cannot poll with a target already activated\n"); 1651 return -EBUSY; 1652 } 1653 1654 if (dev->tgt_mode) { 1655 nfc_err(dev->dev, 1656 "Cannot poll while already being activated\n"); 1657 return -EBUSY; 1658 } 1659 1660 if (tm_protocols) { 1661 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len); 1662 if (dev->gb == NULL) 1663 tm_protocols = 0; 1664 } 1665 1666 dev->poll_protocols = im_protocols; 1667 dev->listen_protocols = tm_protocols; 1668 if (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL) { 1669 skb = pn533_alloc_skb(dev, 4 + 6); 1670 if (!skb) 1671 return -ENOMEM; 1672 1673 *((u8 *)skb_put(skb, sizeof(u8))) = 1674 PN532_AUTOPOLL_POLLNR_INFINITE; 1675 *((u8 *)skb_put(skb, sizeof(u8))) = PN532_AUTOPOLL_PERIOD; 1676 1677 if ((im_protocols & NFC_PROTO_MIFARE_MASK) && 1678 (im_protocols & NFC_PROTO_ISO14443_MASK) && 1679 (im_protocols & NFC_PROTO_NFC_DEP_MASK)) 1680 *((u8 *)skb_put(skb, sizeof(u8))) = 1681 PN532_AUTOPOLL_TYPE_GENERIC_106; 1682 else { 1683 if (im_protocols & NFC_PROTO_MIFARE_MASK) 1684 *((u8 *)skb_put(skb, sizeof(u8))) = 1685 PN532_AUTOPOLL_TYPE_MIFARE; 1686 1687 if (im_protocols & NFC_PROTO_ISO14443_MASK) 1688 *((u8 *)skb_put(skb, sizeof(u8))) = 1689 PN532_AUTOPOLL_TYPE_ISOA; 1690 1691 if (im_protocols & NFC_PROTO_NFC_DEP_MASK) { 1692 *((u8 *)skb_put(skb, sizeof(u8))) = 1693 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106; 1694 *((u8 *)skb_put(skb, sizeof(u8))) = 1695 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212; 1696 *((u8 *)skb_put(skb, sizeof(u8))) = 1697 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424; 1698 } 1699 } 1700 1701 if (im_protocols & NFC_PROTO_FELICA_MASK || 1702 im_protocols & NFC_PROTO_NFC_DEP_MASK) { 1703 *((u8 *)skb_put(skb, sizeof(u8))) = 1704 PN532_AUTOPOLL_TYPE_FELICA212; 1705 *((u8 *)skb_put(skb, sizeof(u8))) = 1706 PN532_AUTOPOLL_TYPE_FELICA424; 1707 } 1708 1709 if (im_protocols & NFC_PROTO_JEWEL_MASK) 1710 *((u8 *)skb_put(skb, sizeof(u8))) = 1711 PN532_AUTOPOLL_TYPE_JEWEL; 1712 1713 if (im_protocols & NFC_PROTO_ISO14443_B_MASK) 1714 *((u8 *)skb_put(skb, sizeof(u8))) = 1715 PN532_AUTOPOLL_TYPE_ISOB; 1716 1717 if (tm_protocols) 1718 *((u8 *)skb_put(skb, sizeof(u8))) = 1719 PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106; 1720 1721 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_AUTOPOLL, skb, 1722 pn533_autopoll_complete, NULL); 1723 1724 if (rc < 0) 1725 dev_kfree_skb(skb); 1726 else 1727 dev->poll_mod_count++; 1728 1729 return rc; 1730 } 1731 1732 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols); 1733 if (!dev->poll_mod_count) { 1734 nfc_err(dev->dev, 1735 "Poll mod list is empty\n"); 1736 return -EINVAL; 1737 } 1738 1739 /* Do not always start polling from the same modulation */ 1740 get_random_bytes(&rand_mod, sizeof(rand_mod)); 1741 rand_mod %= dev->poll_mod_count; 1742 dev->poll_mod_curr = rand_mod; 1743 1744 cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; 1745 1746 rc = pn533_send_poll_frame(dev); 1747 1748 /* Start listen timer */ 1749 if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1) 1750 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ); 1751 1752 return rc; 1753 } 1754 1755 static void pn533_stop_poll(struct nfc_dev *nfc_dev) 1756 { 1757 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1758 1759 timer_delete(&dev->listen_timer); 1760 1761 if (!dev->poll_mod_count) { 1762 dev_dbg(dev->dev, 1763 "Polling operation was not running\n"); 1764 return; 1765 } 1766 1767 dev->phy_ops->abort_cmd(dev, GFP_KERNEL); 1768 flush_delayed_work(&dev->poll_work); 1769 pn533_poll_reset_mod_list(dev); 1770 } 1771 1772 static int pn533_activate_target_nfcdep(struct pn533 *dev) 1773 { 1774 struct pn533_cmd_activate_response *rsp; 1775 u16 gt_len; 1776 int rc; 1777 struct sk_buff *skb; 1778 struct sk_buff *resp; 1779 1780 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/ 1781 if (!skb) 1782 return -ENOMEM; 1783 1784 skb_put_u8(skb, 1); /* TG */ 1785 skb_put_u8(skb, 0); /* Next */ 1786 1787 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb); 1788 if (IS_ERR(resp)) 1789 return PTR_ERR(resp); 1790 1791 rsp = (struct pn533_cmd_activate_response *)resp->data; 1792 rc = rsp->status & PN533_CMD_RET_MASK; 1793 if (rc != PN533_CMD_RET_SUCCESS) { 1794 nfc_err(dev->dev, 1795 "Target activation failed (error 0x%x)\n", rc); 1796 dev_kfree_skb(resp); 1797 return -EIO; 1798 } 1799 1800 /* ATR_RES general bytes are located at offset 16 */ 1801 gt_len = resp->len - 16; 1802 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len); 1803 1804 dev_kfree_skb(resp); 1805 return rc; 1806 } 1807 1808 static int pn533_activate_target(struct nfc_dev *nfc_dev, 1809 struct nfc_target *target, u32 protocol) 1810 { 1811 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1812 int rc; 1813 1814 dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol); 1815 1816 if (dev->poll_mod_count) { 1817 nfc_err(dev->dev, 1818 "Cannot activate while polling\n"); 1819 return -EBUSY; 1820 } 1821 1822 if (dev->tgt_active_prot) { 1823 nfc_err(dev->dev, 1824 "There is already an active target\n"); 1825 return -EBUSY; 1826 } 1827 1828 if (!dev->tgt_available_prots) { 1829 nfc_err(dev->dev, 1830 "There is no available target to activate\n"); 1831 return -EINVAL; 1832 } 1833 1834 if (!(dev->tgt_available_prots & (1 << protocol))) { 1835 nfc_err(dev->dev, 1836 "Target doesn't support requested proto %u\n", 1837 protocol); 1838 return -EINVAL; 1839 } 1840 1841 if (protocol == NFC_PROTO_NFC_DEP) { 1842 rc = pn533_activate_target_nfcdep(dev); 1843 if (rc) { 1844 nfc_err(dev->dev, 1845 "Activating target with DEP failed %d\n", rc); 1846 return rc; 1847 } 1848 } 1849 1850 dev->tgt_active_prot = protocol; 1851 dev->tgt_available_prots = 0; 1852 1853 return 0; 1854 } 1855 1856 static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg, 1857 struct sk_buff *resp) 1858 { 1859 int rc = 0; 1860 1861 if (IS_ERR(resp)) { 1862 rc = PTR_ERR(resp); 1863 1864 nfc_err(dev->dev, "Target release error %d\n", rc); 1865 1866 return rc; 1867 } 1868 1869 rc = resp->data[0] & PN533_CMD_RET_MASK; 1870 if (rc != PN533_CMD_RET_SUCCESS) 1871 nfc_err(dev->dev, 1872 "Error 0x%x when releasing the target\n", rc); 1873 1874 dev_kfree_skb(resp); 1875 return rc; 1876 } 1877 1878 static void pn533_deactivate_target(struct nfc_dev *nfc_dev, 1879 struct nfc_target *target, u8 mode) 1880 { 1881 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1882 struct sk_buff *skb; 1883 int rc; 1884 1885 if (!dev->tgt_active_prot) { 1886 nfc_err(dev->dev, "There is no active target\n"); 1887 return; 1888 } 1889 1890 dev->tgt_active_prot = 0; 1891 skb_queue_purge(&dev->resp_q); 1892 1893 skb = pn533_alloc_skb(dev, sizeof(u8)); 1894 if (!skb) 1895 return; 1896 1897 skb_put_u8(skb, 1); /* TG*/ 1898 1899 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb, 1900 pn533_deactivate_target_complete, NULL); 1901 if (rc < 0) { 1902 dev_kfree_skb(skb); 1903 nfc_err(dev->dev, "Target release error %d\n", rc); 1904 } 1905 } 1906 1907 1908 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg, 1909 struct sk_buff *resp) 1910 { 1911 struct pn533_cmd_jump_dep_response *rsp; 1912 u8 target_gt_len; 1913 int rc; 1914 u8 active = *(u8 *)arg; 1915 1916 kfree(arg); 1917 1918 if (IS_ERR(resp)) 1919 return PTR_ERR(resp); 1920 1921 if (dev->tgt_available_prots && 1922 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) { 1923 nfc_err(dev->dev, 1924 "The target does not support DEP\n"); 1925 rc = -EINVAL; 1926 goto error; 1927 } 1928 1929 rsp = (struct pn533_cmd_jump_dep_response *)resp->data; 1930 1931 rc = rsp->status & PN533_CMD_RET_MASK; 1932 if (rc != PN533_CMD_RET_SUCCESS) { 1933 nfc_err(dev->dev, 1934 "Bringing DEP link up failed (error 0x%x)\n", rc); 1935 goto error; 1936 } 1937 1938 if (!dev->tgt_available_prots) { 1939 struct nfc_target nfc_target; 1940 1941 dev_dbg(dev->dev, "Creating new target\n"); 1942 1943 memset(&nfc_target, 0, sizeof(struct nfc_target)); 1944 1945 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK; 1946 nfc_target.nfcid1_len = 10; 1947 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len); 1948 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1); 1949 if (rc) 1950 goto error; 1951 1952 dev->tgt_available_prots = 0; 1953 } 1954 1955 dev->tgt_active_prot = NFC_PROTO_NFC_DEP; 1956 1957 /* ATR_RES general bytes are located at offset 17 */ 1958 target_gt_len = resp->len - 17; 1959 rc = nfc_set_remote_general_bytes(dev->nfc_dev, 1960 rsp->gt, target_gt_len); 1961 if (rc == 0) 1962 rc = nfc_dep_link_is_up(dev->nfc_dev, 1963 dev->nfc_dev->targets[0].idx, 1964 !active, NFC_RF_INITIATOR); 1965 1966 error: 1967 dev_kfree_skb(resp); 1968 return rc; 1969 } 1970 1971 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf); 1972 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, 1973 u8 comm_mode, u8 *gb, size_t gb_len) 1974 { 1975 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1976 struct sk_buff *skb; 1977 int rc, skb_len; 1978 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE]; 1979 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3}; 1980 1981 if (dev->poll_mod_count) { 1982 nfc_err(dev->dev, 1983 "Cannot bring the DEP link up while polling\n"); 1984 return -EBUSY; 1985 } 1986 1987 if (dev->tgt_active_prot) { 1988 nfc_err(dev->dev, 1989 "There is already an active target\n"); 1990 return -EBUSY; 1991 } 1992 1993 skb_len = 3 + gb_len; /* ActPass + BR + Next */ 1994 skb_len += PASSIVE_DATA_LEN; 1995 1996 /* NFCID3 */ 1997 skb_len += NFC_NFCID3_MAXSIZE; 1998 if (target && !target->nfcid2_len) { 1999 nfcid3[0] = 0x1; 2000 nfcid3[1] = 0xfe; 2001 get_random_bytes(nfcid3 + 2, 6); 2002 } 2003 2004 skb = pn533_alloc_skb(dev, skb_len); 2005 if (!skb) 2006 return -ENOMEM; 2007 2008 skb_put_u8(skb, !comm_mode); /* ActPass */ 2009 skb_put_u8(skb, 0x02); /* 424 kbps */ 2010 2011 next = skb_put(skb, 1); /* Next */ 2012 *next = 0; 2013 2014 /* Copy passive data */ 2015 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN); 2016 *next |= 1; 2017 2018 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */ 2019 if (target && target->nfcid2_len) 2020 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2, 2021 target->nfcid2_len); 2022 else 2023 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE); 2024 *next |= 2; 2025 2026 if (gb != NULL && gb_len > 0) { 2027 skb_put_data(skb, gb, gb_len); 2028 *next |= 4; /* We have some Gi */ 2029 } else { 2030 *next = 0; 2031 } 2032 2033 arg = kmalloc_obj(*arg); 2034 if (!arg) { 2035 dev_kfree_skb(skb); 2036 return -ENOMEM; 2037 } 2038 2039 *arg = !comm_mode; 2040 2041 pn533_rf_field(dev->nfc_dev, 0); 2042 2043 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb, 2044 pn533_in_dep_link_up_complete, arg); 2045 2046 if (rc < 0) { 2047 dev_kfree_skb(skb); 2048 kfree(arg); 2049 } 2050 2051 return rc; 2052 } 2053 2054 static int pn533_dep_link_down(struct nfc_dev *nfc_dev) 2055 { 2056 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2057 2058 pn533_poll_reset_mod_list(dev); 2059 2060 if (dev->tgt_mode || dev->tgt_active_prot) 2061 dev->phy_ops->abort_cmd(dev, GFP_KERNEL); 2062 2063 dev->tgt_active_prot = 0; 2064 dev->tgt_mode = 0; 2065 2066 skb_queue_purge(&dev->resp_q); 2067 2068 return 0; 2069 } 2070 2071 struct pn533_data_exchange_arg { 2072 data_exchange_cb_t cb; 2073 void *cb_context; 2074 }; 2075 2076 static struct sk_buff *pn533_build_response(struct pn533 *dev) 2077 { 2078 struct sk_buff *skb, *tmp, *t; 2079 unsigned int skb_len = 0, tmp_len = 0; 2080 2081 if (skb_queue_empty(&dev->resp_q)) 2082 return NULL; 2083 2084 if (skb_queue_len(&dev->resp_q) == 1) { 2085 skb = skb_dequeue(&dev->resp_q); 2086 goto out; 2087 } 2088 2089 skb_queue_walk_safe(&dev->resp_q, tmp, t) 2090 skb_len += tmp->len; 2091 2092 dev_dbg(dev->dev, "%s total length %d\n", 2093 __func__, skb_len); 2094 2095 skb = alloc_skb(skb_len, GFP_KERNEL); 2096 if (skb == NULL) 2097 goto out; 2098 2099 skb_put(skb, skb_len); 2100 2101 skb_queue_walk_safe(&dev->resp_q, tmp, t) { 2102 memcpy(skb->data + tmp_len, tmp->data, tmp->len); 2103 tmp_len += tmp->len; 2104 } 2105 2106 out: 2107 skb_queue_purge(&dev->resp_q); 2108 2109 return skb; 2110 } 2111 2112 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg, 2113 struct sk_buff *resp) 2114 { 2115 struct pn533_data_exchange_arg *arg = _arg; 2116 struct sk_buff *skb; 2117 int rc = 0; 2118 u8 status, ret, mi; 2119 2120 if (IS_ERR(resp)) { 2121 rc = PTR_ERR(resp); 2122 goto _error; 2123 } 2124 2125 status = resp->data[0]; 2126 ret = status & PN533_CMD_RET_MASK; 2127 mi = status & PN533_CMD_MI_MASK; 2128 2129 skb_pull(resp, sizeof(status)); 2130 2131 if (ret != PN533_CMD_RET_SUCCESS) { 2132 nfc_err(dev->dev, 2133 "Exchanging data failed (error 0x%x)\n", ret); 2134 rc = -EIO; 2135 goto error; 2136 } 2137 2138 skb_queue_tail(&dev->resp_q, resp); 2139 2140 if (mi) { 2141 dev->cmd_complete_mi_arg = arg; 2142 queue_work(dev->wq, &dev->mi_rx_work); 2143 return -EINPROGRESS; 2144 } 2145 2146 /* Prepare for the next round */ 2147 if (skb_queue_len(&dev->fragment_skb) > 0) { 2148 dev->cmd_complete_dep_arg = arg; 2149 queue_work(dev->wq, &dev->mi_tx_work); 2150 2151 return -EINPROGRESS; 2152 } 2153 2154 skb = pn533_build_response(dev); 2155 if (!skb) { 2156 rc = -ENOMEM; 2157 goto error; 2158 } 2159 2160 arg->cb(arg->cb_context, skb, 0); 2161 kfree(arg); 2162 return 0; 2163 2164 error: 2165 dev_kfree_skb(resp); 2166 _error: 2167 skb_queue_purge(&dev->resp_q); 2168 arg->cb(arg->cb_context, NULL, rc); 2169 kfree(arg); 2170 return rc; 2171 } 2172 2173 /* 2174 * Receive an incoming pn533 frame. skb contains only header and payload. 2175 * If skb == NULL, it is a notification that the link below is dead. 2176 */ 2177 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status) 2178 { 2179 if (!dev->cmd) 2180 goto sched_wq; 2181 2182 dev->cmd->status = status; 2183 2184 if (status != 0) { 2185 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status); 2186 goto sched_wq; 2187 } 2188 2189 if (skb == NULL) { 2190 dev_err(dev->dev, "NULL Frame -> link is dead\n"); 2191 goto sched_wq; 2192 } 2193 2194 if (pn533_rx_frame_is_ack(skb->data)) { 2195 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__); 2196 dev_kfree_skb(skb); 2197 return; 2198 } 2199 2200 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data, 2201 dev->ops->rx_frame_size(skb->data), false); 2202 2203 if (!dev->ops->rx_is_frame_valid(skb->data, dev)) { 2204 nfc_err(dev->dev, "Received an invalid frame\n"); 2205 dev->cmd->status = -EIO; 2206 } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) { 2207 nfc_err(dev->dev, "It it not the response to the last command\n"); 2208 dev->cmd->status = -EIO; 2209 } 2210 2211 dev->cmd->resp = skb; 2212 2213 sched_wq: 2214 queue_work(dev->wq, &dev->cmd_complete_work); 2215 } 2216 EXPORT_SYMBOL(pn533_recv_frame); 2217 2218 /* Split the Tx skb into small chunks */ 2219 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb) 2220 { 2221 struct sk_buff *frag; 2222 int frag_size; 2223 2224 do { 2225 /* Remaining size */ 2226 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN) 2227 frag_size = PN533_CMD_DATAFRAME_MAXLEN; 2228 else 2229 frag_size = skb->len; 2230 2231 /* Allocate and reserve */ 2232 frag = pn533_alloc_skb(dev, frag_size); 2233 if (!frag) { 2234 skb_queue_purge(&dev->fragment_skb); 2235 return -ENOMEM; 2236 } 2237 2238 if (!dev->tgt_mode) { 2239 /* Reserve the TG/MI byte */ 2240 skb_reserve(frag, 1); 2241 2242 /* MI + TG */ 2243 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN) 2244 *(u8 *)skb_push(frag, sizeof(u8)) = 2245 (PN533_CMD_MI_MASK | 1); 2246 else 2247 *(u8 *)skb_push(frag, sizeof(u8)) = 1; /* TG */ 2248 } 2249 2250 skb_put_data(frag, skb->data, frag_size); 2251 2252 /* Reduce the size of incoming buffer */ 2253 skb_pull(skb, frag_size); 2254 2255 /* Add this to skb_queue */ 2256 skb_queue_tail(&dev->fragment_skb, frag); 2257 2258 } while (skb->len > 0); 2259 2260 dev_kfree_skb(skb); 2261 2262 return skb_queue_len(&dev->fragment_skb); 2263 } 2264 2265 static int pn533_transceive(struct nfc_dev *nfc_dev, 2266 struct nfc_target *target, struct sk_buff *skb, 2267 data_exchange_cb_t cb, void *cb_context) 2268 { 2269 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2270 struct pn533_data_exchange_arg *arg = NULL; 2271 int rc; 2272 2273 if (!dev->tgt_active_prot) { 2274 nfc_err(dev->dev, 2275 "Can't exchange data if there is no active target\n"); 2276 rc = -EINVAL; 2277 goto error; 2278 } 2279 2280 arg = kmalloc_obj(*arg); 2281 if (!arg) { 2282 rc = -ENOMEM; 2283 goto error; 2284 } 2285 2286 arg->cb = cb; 2287 arg->cb_context = cb_context; 2288 2289 switch (dev->device_type) { 2290 case PN533_DEVICE_PASORI: 2291 if (dev->tgt_active_prot == NFC_PROTO_FELICA) { 2292 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU, 2293 skb, 2294 pn533_data_exchange_complete, 2295 arg); 2296 2297 break; 2298 } 2299 fallthrough; 2300 default: 2301 /* jumbo frame ? */ 2302 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { 2303 rc = pn533_fill_fragment_skbs(dev, skb); 2304 if (rc < 0) 2305 goto error; 2306 2307 skb = skb_dequeue(&dev->fragment_skb); 2308 if (!skb) { 2309 rc = -EIO; 2310 goto error; 2311 } 2312 } else { 2313 *(u8 *)skb_push(skb, sizeof(u8)) = 1; /* TG */ 2314 } 2315 2316 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE, 2317 skb, pn533_data_exchange_complete, 2318 arg); 2319 2320 break; 2321 } 2322 2323 if (rc < 0) /* rc from send_async */ 2324 goto error; 2325 2326 return 0; 2327 2328 error: 2329 kfree(arg); 2330 dev_kfree_skb(skb); 2331 return rc; 2332 } 2333 2334 static int pn533_tm_send_complete(struct pn533 *dev, void *arg, 2335 struct sk_buff *resp) 2336 { 2337 u8 status; 2338 2339 if (IS_ERR(resp)) 2340 return PTR_ERR(resp); 2341 2342 status = resp->data[0]; 2343 2344 /* Prepare for the next round */ 2345 if (skb_queue_len(&dev->fragment_skb) > 0) { 2346 queue_work(dev->wq, &dev->mi_tm_tx_work); 2347 return -EINPROGRESS; 2348 } 2349 dev_kfree_skb(resp); 2350 2351 if (status != 0) { 2352 nfc_tm_deactivated(dev->nfc_dev); 2353 2354 dev->tgt_mode = 0; 2355 2356 return 0; 2357 } 2358 2359 queue_work(dev->wq, &dev->tg_work); 2360 2361 return 0; 2362 } 2363 2364 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) 2365 { 2366 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2367 int rc; 2368 2369 /* let's split in multiple chunks if size's too big */ 2370 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { 2371 rc = pn533_fill_fragment_skbs(dev, skb); 2372 if (rc < 0) 2373 goto error; 2374 2375 /* get the first skb */ 2376 skb = skb_dequeue(&dev->fragment_skb); 2377 if (!skb) { 2378 rc = -EIO; 2379 goto error; 2380 } 2381 2382 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb, 2383 pn533_tm_send_complete, NULL); 2384 } else { 2385 /* Send th skb */ 2386 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb, 2387 pn533_tm_send_complete, NULL); 2388 } 2389 2390 error: 2391 if (rc < 0) { 2392 dev_kfree_skb(skb); 2393 skb_queue_purge(&dev->fragment_skb); 2394 } 2395 2396 return rc; 2397 } 2398 2399 static void pn533_wq_mi_recv(struct work_struct *work) 2400 { 2401 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work); 2402 struct sk_buff *skb; 2403 int rc; 2404 2405 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN); 2406 if (!skb) 2407 goto error; 2408 2409 switch (dev->device_type) { 2410 case PN533_DEVICE_PASORI: 2411 if (dev->tgt_active_prot == NFC_PROTO_FELICA) { 2412 rc = pn533_send_cmd_direct_async(dev, 2413 PN533_CMD_IN_COMM_THRU, 2414 skb, 2415 pn533_data_exchange_complete, 2416 dev->cmd_complete_mi_arg); 2417 2418 break; 2419 } 2420 fallthrough; 2421 default: 2422 skb_put_u8(skb, 1); /*TG*/ 2423 2424 rc = pn533_send_cmd_direct_async(dev, 2425 PN533_CMD_IN_DATA_EXCHANGE, 2426 skb, 2427 pn533_data_exchange_complete, 2428 dev->cmd_complete_mi_arg); 2429 2430 break; 2431 } 2432 2433 if (rc == 0) /* success */ 2434 return; 2435 2436 nfc_err(dev->dev, 2437 "Error %d when trying to perform data_exchange\n", rc); 2438 2439 dev_kfree_skb(skb); 2440 kfree(dev->cmd_complete_mi_arg); 2441 2442 error: 2443 dev->phy_ops->send_ack(dev, GFP_KERNEL); 2444 queue_work(dev->wq, &dev->cmd_work); 2445 } 2446 2447 static void pn533_wq_mi_send(struct work_struct *work) 2448 { 2449 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work); 2450 struct sk_buff *skb; 2451 int rc; 2452 2453 /* Grab the first skb in the queue */ 2454 skb = skb_dequeue(&dev->fragment_skb); 2455 2456 if (skb == NULL) { /* No more data */ 2457 /* Reset the queue for future use */ 2458 skb_queue_head_init(&dev->fragment_skb); 2459 goto error; 2460 } 2461 2462 switch (dev->device_type) { 2463 case PN533_DEVICE_PASORI: 2464 if (dev->tgt_active_prot != NFC_PROTO_FELICA) { 2465 rc = -EIO; 2466 break; 2467 } 2468 2469 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU, 2470 skb, 2471 pn533_data_exchange_complete, 2472 dev->cmd_complete_dep_arg); 2473 2474 break; 2475 2476 default: 2477 /* Still some fragments? */ 2478 rc = pn533_send_cmd_direct_async(dev, 2479 PN533_CMD_IN_DATA_EXCHANGE, 2480 skb, 2481 pn533_data_exchange_complete, 2482 dev->cmd_complete_dep_arg); 2483 2484 break; 2485 } 2486 2487 if (rc == 0) /* success */ 2488 return; 2489 2490 nfc_err(dev->dev, 2491 "Error %d when trying to perform data_exchange\n", rc); 2492 2493 dev_kfree_skb(skb); 2494 kfree(dev->cmd_complete_dep_arg); 2495 2496 error: 2497 dev->phy_ops->send_ack(dev, GFP_KERNEL); 2498 queue_work(dev->wq, &dev->cmd_work); 2499 } 2500 2501 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata, 2502 u8 cfgdata_len) 2503 { 2504 struct sk_buff *skb; 2505 struct sk_buff *resp; 2506 int skb_len; 2507 2508 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */ 2509 2510 skb = pn533_alloc_skb(dev, skb_len); 2511 if (!skb) 2512 return -ENOMEM; 2513 2514 skb_put_u8(skb, cfgitem); 2515 skb_put_data(skb, cfgdata, cfgdata_len); 2516 2517 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb); 2518 if (IS_ERR(resp)) 2519 return PTR_ERR(resp); 2520 2521 dev_kfree_skb(resp); 2522 return 0; 2523 } 2524 2525 static int pn533_get_firmware_version(struct pn533 *dev, 2526 struct pn533_fw_version *fv) 2527 { 2528 struct sk_buff *skb; 2529 struct sk_buff *resp; 2530 2531 skb = pn533_alloc_skb(dev, 0); 2532 if (!skb) 2533 return -ENOMEM; 2534 2535 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb); 2536 if (IS_ERR(resp)) 2537 return PTR_ERR(resp); 2538 2539 fv->ic = resp->data[0]; 2540 fv->ver = resp->data[1]; 2541 fv->rev = resp->data[2]; 2542 fv->support = resp->data[3]; 2543 2544 dev_kfree_skb(resp); 2545 return 0; 2546 } 2547 2548 static int pn533_pasori_fw_reset(struct pn533 *dev) 2549 { 2550 struct sk_buff *skb; 2551 struct sk_buff *resp; 2552 2553 skb = pn533_alloc_skb(dev, sizeof(u8)); 2554 if (!skb) 2555 return -ENOMEM; 2556 2557 skb_put_u8(skb, 0x1); 2558 2559 resp = pn533_send_cmd_sync(dev, 0x18, skb); 2560 if (IS_ERR(resp)) 2561 return PTR_ERR(resp); 2562 2563 dev_kfree_skb(resp); 2564 2565 return 0; 2566 } 2567 2568 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf) 2569 { 2570 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2571 u8 rf_field = !!rf; 2572 int rc; 2573 2574 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA; 2575 2576 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD, 2577 (u8 *)&rf_field, 1); 2578 if (rc) { 2579 nfc_err(dev->dev, "Error on setting RF field\n"); 2580 return rc; 2581 } 2582 2583 return 0; 2584 } 2585 2586 static int pn532_sam_configuration(struct nfc_dev *nfc_dev) 2587 { 2588 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2589 struct sk_buff *skb; 2590 struct sk_buff *resp; 2591 2592 skb = pn533_alloc_skb(dev, 1); 2593 if (!skb) 2594 return -ENOMEM; 2595 2596 skb_put_u8(skb, 0x01); 2597 2598 resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb); 2599 if (IS_ERR(resp)) 2600 return PTR_ERR(resp); 2601 2602 dev_kfree_skb(resp); 2603 return 0; 2604 } 2605 2606 static int pn533_dev_up(struct nfc_dev *nfc_dev) 2607 { 2608 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2609 int rc; 2610 2611 if (dev->phy_ops->dev_up) { 2612 rc = dev->phy_ops->dev_up(dev); 2613 if (rc) 2614 return rc; 2615 } 2616 2617 if ((dev->device_type == PN533_DEVICE_PN532) || 2618 (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) { 2619 rc = pn532_sam_configuration(nfc_dev); 2620 2621 if (rc) 2622 return rc; 2623 } 2624 2625 return pn533_rf_field(nfc_dev, 1); 2626 } 2627 2628 static int pn533_dev_down(struct nfc_dev *nfc_dev) 2629 { 2630 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2631 int ret; 2632 2633 ret = pn533_rf_field(nfc_dev, 0); 2634 if (dev->phy_ops->dev_down && !ret) 2635 ret = dev->phy_ops->dev_down(dev); 2636 2637 return ret; 2638 } 2639 2640 static const struct nfc_ops pn533_nfc_ops = { 2641 .dev_up = pn533_dev_up, 2642 .dev_down = pn533_dev_down, 2643 .dep_link_up = pn533_dep_link_up, 2644 .dep_link_down = pn533_dep_link_down, 2645 .start_poll = pn533_start_poll, 2646 .stop_poll = pn533_stop_poll, 2647 .activate_target = pn533_activate_target, 2648 .deactivate_target = pn533_deactivate_target, 2649 .im_transceive = pn533_transceive, 2650 .tm_send = pn533_tm_send, 2651 }; 2652 2653 static int pn533_setup(struct pn533 *dev) 2654 { 2655 struct pn533_config_max_retries max_retries; 2656 struct pn533_config_timing timing; 2657 u8 pasori_cfg[3] = {0x08, 0x01, 0x08}; 2658 int rc; 2659 2660 switch (dev->device_type) { 2661 case PN533_DEVICE_STD: 2662 case PN533_DEVICE_PASORI: 2663 case PN533_DEVICE_ACR122U: 2664 case PN533_DEVICE_PN532: 2665 case PN533_DEVICE_PN532_AUTOPOLL: 2666 max_retries.mx_rty_atr = 0x2; 2667 max_retries.mx_rty_psl = 0x1; 2668 max_retries.mx_rty_passive_act = 2669 PN533_CONFIG_MAX_RETRIES_NO_RETRY; 2670 2671 timing.rfu = PN533_CONFIG_TIMING_102; 2672 timing.atr_res_timeout = PN533_CONFIG_TIMING_102; 2673 timing.dep_timeout = PN533_CONFIG_TIMING_204; 2674 2675 break; 2676 2677 default: 2678 nfc_err(dev->dev, "Unknown device type %d\n", 2679 dev->device_type); 2680 return -EINVAL; 2681 } 2682 2683 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES, 2684 (u8 *)&max_retries, sizeof(max_retries)); 2685 if (rc) { 2686 nfc_err(dev->dev, 2687 "Error on setting MAX_RETRIES config\n"); 2688 return rc; 2689 } 2690 2691 2692 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING, 2693 (u8 *)&timing, sizeof(timing)); 2694 if (rc) { 2695 nfc_err(dev->dev, "Error on setting RF timings\n"); 2696 return rc; 2697 } 2698 2699 switch (dev->device_type) { 2700 case PN533_DEVICE_STD: 2701 case PN533_DEVICE_PN532: 2702 case PN533_DEVICE_PN532_AUTOPOLL: 2703 break; 2704 2705 case PN533_DEVICE_PASORI: 2706 pn533_pasori_fw_reset(dev); 2707 2708 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI, 2709 pasori_cfg, 3); 2710 if (rc) { 2711 nfc_err(dev->dev, 2712 "Error while settings PASORI config\n"); 2713 return rc; 2714 } 2715 2716 pn533_pasori_fw_reset(dev); 2717 2718 break; 2719 } 2720 2721 return 0; 2722 } 2723 2724 int pn533_finalize_setup(struct pn533 *dev) 2725 { 2726 2727 struct pn533_fw_version fw_ver; 2728 int rc; 2729 2730 memset(&fw_ver, 0, sizeof(fw_ver)); 2731 2732 rc = pn533_get_firmware_version(dev, &fw_ver); 2733 if (rc) { 2734 nfc_err(dev->dev, "Unable to get FW version\n"); 2735 return rc; 2736 } 2737 2738 nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n", 2739 fw_ver.ic, fw_ver.ver, fw_ver.rev); 2740 2741 rc = pn533_setup(dev); 2742 if (rc) 2743 return rc; 2744 2745 return 0; 2746 } 2747 EXPORT_SYMBOL_GPL(pn533_finalize_setup); 2748 2749 struct pn533 *pn53x_common_init(u32 device_type, 2750 enum pn533_protocol_type protocol_type, 2751 void *phy, 2752 const struct pn533_phy_ops *phy_ops, 2753 struct pn533_frame_ops *fops, 2754 struct device *dev) 2755 { 2756 struct pn533 *priv; 2757 2758 priv = kzalloc_obj(*priv); 2759 if (!priv) 2760 return ERR_PTR(-ENOMEM); 2761 2762 priv->phy = phy; 2763 priv->phy_ops = phy_ops; 2764 priv->dev = dev; 2765 if (fops != NULL) 2766 priv->ops = fops; 2767 else 2768 priv->ops = &pn533_std_frame_ops; 2769 2770 priv->protocol_type = protocol_type; 2771 priv->device_type = device_type; 2772 2773 mutex_init(&priv->cmd_lock); 2774 2775 INIT_WORK(&priv->cmd_work, pn533_wq_cmd); 2776 INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete); 2777 INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv); 2778 INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send); 2779 INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data); 2780 INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv); 2781 INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send); 2782 INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll); 2783 INIT_WORK(&priv->rf_work, pn533_wq_rf); 2784 priv->wq = alloc_ordered_workqueue("pn533", 0); 2785 if (priv->wq == NULL) 2786 goto error; 2787 2788 timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0); 2789 2790 skb_queue_head_init(&priv->resp_q); 2791 skb_queue_head_init(&priv->fragment_skb); 2792 2793 INIT_LIST_HEAD(&priv->cmd_queue); 2794 return priv; 2795 2796 error: 2797 kfree(priv); 2798 return ERR_PTR(-ENOMEM); 2799 } 2800 EXPORT_SYMBOL_GPL(pn53x_common_init); 2801 2802 void pn53x_common_clean(struct pn533 *priv) 2803 { 2804 struct pn533_cmd *cmd, *n; 2805 2806 /* delete the timer before cleanup the worker */ 2807 timer_shutdown_sync(&priv->listen_timer); 2808 2809 flush_delayed_work(&priv->poll_work); 2810 destroy_workqueue(priv->wq); 2811 2812 skb_queue_purge(&priv->resp_q); 2813 skb_queue_purge(&priv->fragment_skb); 2814 2815 list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) { 2816 list_del(&cmd->queue); 2817 kfree(cmd); 2818 } 2819 2820 kfree(priv); 2821 } 2822 EXPORT_SYMBOL_GPL(pn53x_common_clean); 2823 2824 int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols, 2825 struct device *parent) 2826 { 2827 priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols, 2828 priv->ops->tx_header_len + 2829 PN533_CMD_DATAEXCH_HEAD_LEN, 2830 priv->ops->tx_tail_len); 2831 if (!priv->nfc_dev) 2832 return -ENOMEM; 2833 2834 nfc_set_parent_dev(priv->nfc_dev, parent); 2835 nfc_set_drvdata(priv->nfc_dev, priv); 2836 return 0; 2837 } 2838 EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc); 2839 2840 int pn53x_register_nfc(struct pn533 *priv, u32 protocols, 2841 struct device *parent) 2842 { 2843 int rc; 2844 2845 rc = pn532_i2c_nfc_alloc(priv, protocols, parent); 2846 if (rc) 2847 return rc; 2848 2849 rc = nfc_register_device(priv->nfc_dev); 2850 if (rc) 2851 nfc_free_device(priv->nfc_dev); 2852 2853 return rc; 2854 } 2855 EXPORT_SYMBOL_GPL(pn53x_register_nfc); 2856 2857 void pn53x_unregister_nfc(struct pn533 *priv) 2858 { 2859 nfc_unregister_device(priv->nfc_dev); 2860 nfc_free_device(priv->nfc_dev); 2861 } 2862 EXPORT_SYMBOL_GPL(pn53x_unregister_nfc); 2863 2864 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>"); 2865 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>"); 2866 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>"); 2867 MODULE_DESCRIPTION("PN533 driver ver " VERSION); 2868 MODULE_VERSION(VERSION); 2869 MODULE_LICENSE("GPL"); 2870