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 dev_dbg(dev->dev, "%s\n", __func__); 1079 1080 if (IS_ERR(resp)) { 1081 skb_queue_purge(&dev->resp_q); 1082 return PTR_ERR(resp); 1083 } 1084 1085 status = resp->data[0]; 1086 1087 ret = status & PN533_CMD_RET_MASK; 1088 mi = status & PN533_CMD_MI_MASK; 1089 1090 skb_pull(resp, sizeof(status)); 1091 1092 if (ret != PN533_CMD_RET_SUCCESS) { 1093 rc = -EIO; 1094 goto error; 1095 } 1096 1097 skb_queue_tail(&dev->resp_q, resp); 1098 1099 if (mi) { 1100 queue_work(dev->wq, &dev->mi_tm_rx_work); 1101 return -EINPROGRESS; 1102 } 1103 1104 skb = pn533_build_response(dev); 1105 if (!skb) { 1106 rc = -EIO; 1107 goto error; 1108 } 1109 1110 return nfc_tm_data_received(dev->nfc_dev, skb); 1111 1112 error: 1113 nfc_tm_deactivated(dev->nfc_dev); 1114 dev->tgt_mode = 0; 1115 skb_queue_purge(&dev->resp_q); 1116 dev_kfree_skb(resp); 1117 1118 return rc; 1119 } 1120 1121 static void pn533_wq_tm_mi_recv(struct work_struct *work) 1122 { 1123 struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work); 1124 struct sk_buff *skb; 1125 int rc; 1126 1127 dev_dbg(dev->dev, "%s\n", __func__); 1128 1129 skb = pn533_alloc_skb(dev, 0); 1130 if (!skb) 1131 return; 1132 1133 rc = pn533_send_cmd_direct_async(dev, 1134 PN533_CMD_TG_GET_DATA, 1135 skb, 1136 pn533_tm_get_data_complete, 1137 NULL); 1138 1139 if (rc < 0) 1140 dev_kfree_skb(skb); 1141 } 1142 1143 static int pn533_tm_send_complete(struct pn533 *dev, void *arg, 1144 struct sk_buff *resp); 1145 static void pn533_wq_tm_mi_send(struct work_struct *work) 1146 { 1147 struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work); 1148 struct sk_buff *skb; 1149 int rc; 1150 1151 dev_dbg(dev->dev, "%s\n", __func__); 1152 1153 /* Grab the first skb in the queue */ 1154 skb = skb_dequeue(&dev->fragment_skb); 1155 if (skb == NULL) { /* No more data */ 1156 /* Reset the queue for future use */ 1157 skb_queue_head_init(&dev->fragment_skb); 1158 goto error; 1159 } 1160 1161 /* last entry - remove MI bit */ 1162 if (skb_queue_len(&dev->fragment_skb) == 0) { 1163 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA, 1164 skb, pn533_tm_send_complete, NULL); 1165 } else 1166 rc = pn533_send_cmd_direct_async(dev, 1167 PN533_CMD_TG_SET_META_DATA, 1168 skb, pn533_tm_send_complete, NULL); 1169 1170 if (rc == 0) /* success */ 1171 return; 1172 1173 dev_err(dev->dev, 1174 "Error %d when trying to perform set meta data_exchange", rc); 1175 1176 dev_kfree_skb(skb); 1177 1178 error: 1179 dev->phy_ops->send_ack(dev, GFP_KERNEL); 1180 queue_work(dev->wq, &dev->cmd_work); 1181 } 1182 1183 static void pn533_wq_tg_get_data(struct work_struct *work) 1184 { 1185 struct pn533 *dev = container_of(work, struct pn533, tg_work); 1186 struct sk_buff *skb; 1187 int rc; 1188 1189 dev_dbg(dev->dev, "%s\n", __func__); 1190 1191 skb = pn533_alloc_skb(dev, 0); 1192 if (!skb) 1193 return; 1194 1195 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb, 1196 pn533_tm_get_data_complete, NULL); 1197 1198 if (rc < 0) 1199 dev_kfree_skb(skb); 1200 } 1201 1202 #define ATR_REQ_GB_OFFSET 17 1203 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp) 1204 { 1205 u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb; 1206 size_t gb_len; 1207 int rc; 1208 1209 dev_dbg(dev->dev, "%s\n", __func__); 1210 1211 if (resp->len < ATR_REQ_GB_OFFSET + 1) 1212 return -EINVAL; 1213 1214 mode = resp->data[0]; 1215 cmd = &resp->data[1]; 1216 1217 dev_dbg(dev->dev, "Target mode 0x%x len %d\n", 1218 mode, resp->len); 1219 1220 if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) == 1221 PN533_INIT_TARGET_RESP_ACTIVE) 1222 comm_mode = NFC_COMM_ACTIVE; 1223 1224 if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0) /* Only DEP supported */ 1225 return -EOPNOTSUPP; 1226 1227 gb = cmd + ATR_REQ_GB_OFFSET; 1228 gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1); 1229 1230 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK, 1231 comm_mode, gb, gb_len); 1232 if (rc < 0) { 1233 nfc_err(dev->dev, 1234 "Error when signaling target activation\n"); 1235 return rc; 1236 } 1237 1238 dev->tgt_mode = 1; 1239 queue_work(dev->wq, &dev->tg_work); 1240 1241 return 0; 1242 } 1243 1244 static void pn533_listen_mode_timer(struct timer_list *t) 1245 { 1246 struct pn533 *dev = from_timer(dev, t, listen_timer); 1247 1248 dev_dbg(dev->dev, "Listen mode timeout\n"); 1249 1250 dev->cancel_listen = 1; 1251 1252 pn533_poll_next_mod(dev); 1253 1254 queue_delayed_work(dev->wq, &dev->poll_work, 1255 msecs_to_jiffies(PN533_POLL_INTERVAL)); 1256 } 1257 1258 static int pn533_rf_complete(struct pn533 *dev, void *arg, 1259 struct sk_buff *resp) 1260 { 1261 int rc = 0; 1262 1263 dev_dbg(dev->dev, "%s\n", __func__); 1264 1265 if (IS_ERR(resp)) { 1266 rc = PTR_ERR(resp); 1267 1268 nfc_err(dev->dev, "RF setting error %d\n", rc); 1269 1270 return rc; 1271 } 1272 1273 queue_delayed_work(dev->wq, &dev->poll_work, 1274 msecs_to_jiffies(PN533_POLL_INTERVAL)); 1275 1276 dev_kfree_skb(resp); 1277 return rc; 1278 } 1279 1280 static void pn533_wq_rf(struct work_struct *work) 1281 { 1282 struct pn533 *dev = container_of(work, struct pn533, rf_work); 1283 struct sk_buff *skb; 1284 int rc; 1285 1286 dev_dbg(dev->dev, "%s\n", __func__); 1287 1288 skb = pn533_alloc_skb(dev, 2); 1289 if (!skb) 1290 return; 1291 1292 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD); 1293 skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA); 1294 1295 rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb, 1296 pn533_rf_complete, NULL); 1297 if (rc < 0) { 1298 dev_kfree_skb(skb); 1299 nfc_err(dev->dev, "RF setting error %d\n", rc); 1300 } 1301 } 1302 1303 static int pn533_poll_dep_complete(struct pn533 *dev, void *arg, 1304 struct sk_buff *resp) 1305 { 1306 struct pn533_cmd_jump_dep_response *rsp; 1307 struct nfc_target nfc_target; 1308 u8 target_gt_len; 1309 int rc; 1310 1311 if (IS_ERR(resp)) 1312 return PTR_ERR(resp); 1313 1314 rsp = (struct pn533_cmd_jump_dep_response *)resp->data; 1315 1316 rc = rsp->status & PN533_CMD_RET_MASK; 1317 if (rc != PN533_CMD_RET_SUCCESS) { 1318 /* Not target found, turn radio off */ 1319 queue_work(dev->wq, &dev->rf_work); 1320 1321 dev_kfree_skb(resp); 1322 return 0; 1323 } 1324 1325 dev_dbg(dev->dev, "Creating new target"); 1326 1327 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK; 1328 nfc_target.nfcid1_len = 10; 1329 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len); 1330 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1); 1331 if (rc) 1332 goto error; 1333 1334 dev->tgt_available_prots = 0; 1335 dev->tgt_active_prot = NFC_PROTO_NFC_DEP; 1336 1337 /* ATR_RES general bytes are located at offset 17 */ 1338 target_gt_len = resp->len - 17; 1339 rc = nfc_set_remote_general_bytes(dev->nfc_dev, 1340 rsp->gt, target_gt_len); 1341 if (!rc) { 1342 rc = nfc_dep_link_is_up(dev->nfc_dev, 1343 dev->nfc_dev->targets[0].idx, 1344 0, NFC_RF_INITIATOR); 1345 1346 if (!rc) 1347 pn533_poll_reset_mod_list(dev); 1348 } 1349 error: 1350 dev_kfree_skb(resp); 1351 return rc; 1352 } 1353 1354 #define PASSIVE_DATA_LEN 5 1355 static int pn533_poll_dep(struct nfc_dev *nfc_dev) 1356 { 1357 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1358 struct sk_buff *skb; 1359 int rc, skb_len; 1360 u8 *next, nfcid3[NFC_NFCID3_MAXSIZE]; 1361 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3}; 1362 1363 dev_dbg(dev->dev, "%s", __func__); 1364 1365 if (!dev->gb) { 1366 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len); 1367 1368 if (!dev->gb || !dev->gb_len) { 1369 dev->poll_dep = 0; 1370 queue_work(dev->wq, &dev->rf_work); 1371 } 1372 } 1373 1374 skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */ 1375 skb_len += PASSIVE_DATA_LEN; 1376 1377 /* NFCID3 */ 1378 skb_len += NFC_NFCID3_MAXSIZE; 1379 nfcid3[0] = 0x1; 1380 nfcid3[1] = 0xfe; 1381 get_random_bytes(nfcid3 + 2, 6); 1382 1383 skb = pn533_alloc_skb(dev, skb_len); 1384 if (!skb) 1385 return -ENOMEM; 1386 1387 skb_put_u8(skb, 0x01); /* Active */ 1388 skb_put_u8(skb, 0x02); /* 424 kbps */ 1389 1390 next = skb_put(skb, 1); /* Next */ 1391 *next = 0; 1392 1393 /* Copy passive data */ 1394 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN); 1395 *next |= 1; 1396 1397 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */ 1398 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE); 1399 *next |= 2; 1400 1401 skb_put_data(skb, dev->gb, dev->gb_len); 1402 *next |= 4; /* We have some Gi */ 1403 1404 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb, 1405 pn533_poll_dep_complete, NULL); 1406 1407 if (rc < 0) 1408 dev_kfree_skb(skb); 1409 1410 return rc; 1411 } 1412 1413 static int pn533_autopoll_complete(struct pn533 *dev, void *arg, 1414 struct sk_buff *resp) 1415 { 1416 struct pn532_autopoll_resp *apr; 1417 struct nfc_target nfc_tgt; 1418 u8 nbtg; 1419 int rc; 1420 1421 if (IS_ERR(resp)) { 1422 rc = PTR_ERR(resp); 1423 1424 nfc_err(dev->dev, "%s autopoll complete error %d\n", 1425 __func__, rc); 1426 1427 if (rc == -ENOENT) { 1428 if (dev->poll_mod_count != 0) 1429 return rc; 1430 goto stop_poll; 1431 } else if (rc < 0) { 1432 nfc_err(dev->dev, 1433 "Error %d when running autopoll\n", rc); 1434 goto stop_poll; 1435 } 1436 } 1437 1438 nbtg = resp->data[0]; 1439 if ((nbtg > 2) || (nbtg <= 0)) 1440 return -EAGAIN; 1441 1442 apr = (struct pn532_autopoll_resp *)&resp->data[1]; 1443 while (nbtg--) { 1444 memset(&nfc_tgt, 0, sizeof(struct nfc_target)); 1445 switch (apr->type) { 1446 case PN532_AUTOPOLL_TYPE_ISOA: 1447 dev_dbg(dev->dev, "ISOA\n"); 1448 rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata, 1449 apr->ln - 1); 1450 break; 1451 case PN532_AUTOPOLL_TYPE_FELICA212: 1452 case PN532_AUTOPOLL_TYPE_FELICA424: 1453 dev_dbg(dev->dev, "FELICA\n"); 1454 rc = pn533_target_found_felica(&nfc_tgt, apr->tgdata, 1455 apr->ln - 1); 1456 break; 1457 case PN532_AUTOPOLL_TYPE_JEWEL: 1458 dev_dbg(dev->dev, "JEWEL\n"); 1459 rc = pn533_target_found_jewel(&nfc_tgt, apr->tgdata, 1460 apr->ln - 1); 1461 break; 1462 case PN532_AUTOPOLL_TYPE_ISOB: 1463 dev_dbg(dev->dev, "ISOB\n"); 1464 rc = pn533_target_found_type_b(&nfc_tgt, apr->tgdata, 1465 apr->ln - 1); 1466 break; 1467 case PN532_AUTOPOLL_TYPE_MIFARE: 1468 dev_dbg(dev->dev, "Mifare\n"); 1469 rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata, 1470 apr->ln - 1); 1471 break; 1472 default: 1473 nfc_err(dev->dev, 1474 "Unknown current poll modulation\n"); 1475 rc = -EPROTO; 1476 } 1477 1478 if (rc) 1479 goto done; 1480 1481 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) { 1482 nfc_err(dev->dev, 1483 "The Tg found doesn't have the desired protocol\n"); 1484 rc = -EAGAIN; 1485 goto done; 1486 } 1487 1488 dev->tgt_available_prots = nfc_tgt.supported_protocols; 1489 apr = (struct pn532_autopoll_resp *) 1490 (apr->tgdata + (apr->ln - 1)); 1491 } 1492 1493 pn533_poll_reset_mod_list(dev); 1494 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1); 1495 1496 done: 1497 dev_kfree_skb(resp); 1498 return rc; 1499 1500 stop_poll: 1501 nfc_err(dev->dev, "autopoll operation has been stopped\n"); 1502 1503 pn533_poll_reset_mod_list(dev); 1504 dev->poll_protocols = 0; 1505 return rc; 1506 } 1507 1508 static int pn533_poll_complete(struct pn533 *dev, void *arg, 1509 struct sk_buff *resp) 1510 { 1511 struct pn533_poll_modulations *cur_mod; 1512 int rc; 1513 1514 dev_dbg(dev->dev, "%s\n", __func__); 1515 1516 if (IS_ERR(resp)) { 1517 rc = PTR_ERR(resp); 1518 1519 nfc_err(dev->dev, "%s Poll complete error %d\n", 1520 __func__, rc); 1521 1522 if (rc == -ENOENT) { 1523 if (dev->poll_mod_count != 0) 1524 return rc; 1525 goto stop_poll; 1526 } else if (rc < 0) { 1527 nfc_err(dev->dev, 1528 "Error %d when running poll\n", rc); 1529 goto stop_poll; 1530 } 1531 } 1532 1533 cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; 1534 1535 if (cur_mod->len == 0) { /* Target mode */ 1536 del_timer(&dev->listen_timer); 1537 rc = pn533_init_target_complete(dev, resp); 1538 goto done; 1539 } 1540 1541 /* Initiator mode */ 1542 rc = pn533_start_poll_complete(dev, resp); 1543 if (!rc) 1544 goto done; 1545 1546 if (!dev->poll_mod_count) { 1547 dev_dbg(dev->dev, "Polling has been stopped\n"); 1548 goto done; 1549 } 1550 1551 pn533_poll_next_mod(dev); 1552 /* Not target found, turn radio off */ 1553 queue_work(dev->wq, &dev->rf_work); 1554 1555 done: 1556 dev_kfree_skb(resp); 1557 return rc; 1558 1559 stop_poll: 1560 nfc_err(dev->dev, "Polling operation has been stopped\n"); 1561 1562 pn533_poll_reset_mod_list(dev); 1563 dev->poll_protocols = 0; 1564 return rc; 1565 } 1566 1567 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev, 1568 struct pn533_poll_modulations *mod) 1569 { 1570 struct sk_buff *skb; 1571 1572 skb = pn533_alloc_skb(dev, mod->len); 1573 if (!skb) 1574 return NULL; 1575 1576 skb_put_data(skb, &mod->data, mod->len); 1577 1578 return skb; 1579 } 1580 1581 static int pn533_send_poll_frame(struct pn533 *dev) 1582 { 1583 struct pn533_poll_modulations *mod; 1584 struct sk_buff *skb; 1585 int rc; 1586 u8 cmd_code; 1587 1588 mod = dev->poll_mod_active[dev->poll_mod_curr]; 1589 1590 dev_dbg(dev->dev, "%s mod len %d\n", 1591 __func__, mod->len); 1592 1593 if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep) { 1594 dev->poll_dep = 0; 1595 return pn533_poll_dep(dev->nfc_dev); 1596 } 1597 1598 if (mod->len == 0) { /* Listen mode */ 1599 cmd_code = PN533_CMD_TG_INIT_AS_TARGET; 1600 skb = pn533_alloc_poll_tg_frame(dev); 1601 } else { /* Polling mode */ 1602 cmd_code = PN533_CMD_IN_LIST_PASSIVE_TARGET; 1603 skb = pn533_alloc_poll_in_frame(dev, mod); 1604 } 1605 1606 if (!skb) { 1607 nfc_err(dev->dev, "Failed to allocate skb\n"); 1608 return -ENOMEM; 1609 } 1610 1611 rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete, 1612 NULL); 1613 if (rc < 0) { 1614 dev_kfree_skb(skb); 1615 nfc_err(dev->dev, "Polling loop error %d\n", rc); 1616 } 1617 1618 return rc; 1619 } 1620 1621 static void pn533_wq_poll(struct work_struct *work) 1622 { 1623 struct pn533 *dev = container_of(work, struct pn533, poll_work.work); 1624 struct pn533_poll_modulations *cur_mod; 1625 int rc; 1626 1627 cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; 1628 1629 dev_dbg(dev->dev, 1630 "%s cancel_listen %d modulation len %d\n", 1631 __func__, dev->cancel_listen, cur_mod->len); 1632 1633 if (dev->cancel_listen == 1) { 1634 dev->cancel_listen = 0; 1635 dev->phy_ops->abort_cmd(dev, GFP_ATOMIC); 1636 } 1637 1638 rc = pn533_send_poll_frame(dev); 1639 if (rc) 1640 return; 1641 1642 if (cur_mod->len == 0 && dev->poll_mod_count > 1) 1643 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ); 1644 } 1645 1646 static int pn533_start_poll(struct nfc_dev *nfc_dev, 1647 u32 im_protocols, u32 tm_protocols) 1648 { 1649 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1650 struct pn533_poll_modulations *cur_mod; 1651 struct sk_buff *skb; 1652 u8 rand_mod; 1653 int rc; 1654 1655 dev_dbg(dev->dev, 1656 "%s: im protocols 0x%x tm protocols 0x%x\n", 1657 __func__, im_protocols, tm_protocols); 1658 1659 if (dev->tgt_active_prot) { 1660 nfc_err(dev->dev, 1661 "Cannot poll with a target already activated\n"); 1662 return -EBUSY; 1663 } 1664 1665 if (dev->tgt_mode) { 1666 nfc_err(dev->dev, 1667 "Cannot poll while already being activated\n"); 1668 return -EBUSY; 1669 } 1670 1671 if (tm_protocols) { 1672 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len); 1673 if (dev->gb == NULL) 1674 tm_protocols = 0; 1675 } 1676 1677 dev->poll_protocols = im_protocols; 1678 dev->listen_protocols = tm_protocols; 1679 if (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL) { 1680 skb = pn533_alloc_skb(dev, 4 + 6); 1681 if (!skb) 1682 return -ENOMEM; 1683 1684 *((u8 *)skb_put(skb, sizeof(u8))) = 1685 PN532_AUTOPOLL_POLLNR_INFINITE; 1686 *((u8 *)skb_put(skb, sizeof(u8))) = PN532_AUTOPOLL_PERIOD; 1687 1688 if ((im_protocols & NFC_PROTO_MIFARE_MASK) && 1689 (im_protocols & NFC_PROTO_ISO14443_MASK) && 1690 (im_protocols & NFC_PROTO_NFC_DEP_MASK)) 1691 *((u8 *)skb_put(skb, sizeof(u8))) = 1692 PN532_AUTOPOLL_TYPE_GENERIC_106; 1693 else { 1694 if (im_protocols & NFC_PROTO_MIFARE_MASK) 1695 *((u8 *)skb_put(skb, sizeof(u8))) = 1696 PN532_AUTOPOLL_TYPE_MIFARE; 1697 1698 if (im_protocols & NFC_PROTO_ISO14443_MASK) 1699 *((u8 *)skb_put(skb, sizeof(u8))) = 1700 PN532_AUTOPOLL_TYPE_ISOA; 1701 1702 if (im_protocols & NFC_PROTO_NFC_DEP_MASK) { 1703 *((u8 *)skb_put(skb, sizeof(u8))) = 1704 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106; 1705 *((u8 *)skb_put(skb, sizeof(u8))) = 1706 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212; 1707 *((u8 *)skb_put(skb, sizeof(u8))) = 1708 PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424; 1709 } 1710 } 1711 1712 if (im_protocols & NFC_PROTO_FELICA_MASK || 1713 im_protocols & NFC_PROTO_NFC_DEP_MASK) { 1714 *((u8 *)skb_put(skb, sizeof(u8))) = 1715 PN532_AUTOPOLL_TYPE_FELICA212; 1716 *((u8 *)skb_put(skb, sizeof(u8))) = 1717 PN532_AUTOPOLL_TYPE_FELICA424; 1718 } 1719 1720 if (im_protocols & NFC_PROTO_JEWEL_MASK) 1721 *((u8 *)skb_put(skb, sizeof(u8))) = 1722 PN532_AUTOPOLL_TYPE_JEWEL; 1723 1724 if (im_protocols & NFC_PROTO_ISO14443_B_MASK) 1725 *((u8 *)skb_put(skb, sizeof(u8))) = 1726 PN532_AUTOPOLL_TYPE_ISOB; 1727 1728 if (tm_protocols) 1729 *((u8 *)skb_put(skb, sizeof(u8))) = 1730 PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106; 1731 1732 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_AUTOPOLL, skb, 1733 pn533_autopoll_complete, NULL); 1734 1735 if (rc < 0) 1736 dev_kfree_skb(skb); 1737 else 1738 dev->poll_mod_count++; 1739 1740 return rc; 1741 } 1742 1743 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols); 1744 1745 /* Do not always start polling from the same modulation */ 1746 get_random_bytes(&rand_mod, sizeof(rand_mod)); 1747 rand_mod %= dev->poll_mod_count; 1748 dev->poll_mod_curr = rand_mod; 1749 1750 cur_mod = dev->poll_mod_active[dev->poll_mod_curr]; 1751 1752 rc = pn533_send_poll_frame(dev); 1753 1754 /* Start listen timer */ 1755 if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1) 1756 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ); 1757 1758 return rc; 1759 } 1760 1761 static void pn533_stop_poll(struct nfc_dev *nfc_dev) 1762 { 1763 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1764 1765 del_timer(&dev->listen_timer); 1766 1767 if (!dev->poll_mod_count) { 1768 dev_dbg(dev->dev, 1769 "Polling operation was not running\n"); 1770 return; 1771 } 1772 1773 dev->phy_ops->abort_cmd(dev, GFP_KERNEL); 1774 flush_delayed_work(&dev->poll_work); 1775 pn533_poll_reset_mod_list(dev); 1776 } 1777 1778 static int pn533_activate_target_nfcdep(struct pn533 *dev) 1779 { 1780 struct pn533_cmd_activate_response *rsp; 1781 u16 gt_len; 1782 int rc; 1783 struct sk_buff *skb; 1784 struct sk_buff *resp; 1785 1786 dev_dbg(dev->dev, "%s\n", __func__); 1787 1788 skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/ 1789 if (!skb) 1790 return -ENOMEM; 1791 1792 skb_put_u8(skb, 1); /* TG */ 1793 skb_put_u8(skb, 0); /* Next */ 1794 1795 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb); 1796 if (IS_ERR(resp)) 1797 return PTR_ERR(resp); 1798 1799 rsp = (struct pn533_cmd_activate_response *)resp->data; 1800 rc = rsp->status & PN533_CMD_RET_MASK; 1801 if (rc != PN533_CMD_RET_SUCCESS) { 1802 nfc_err(dev->dev, 1803 "Target activation failed (error 0x%x)\n", rc); 1804 dev_kfree_skb(resp); 1805 return -EIO; 1806 } 1807 1808 /* ATR_RES general bytes are located at offset 16 */ 1809 gt_len = resp->len - 16; 1810 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len); 1811 1812 dev_kfree_skb(resp); 1813 return rc; 1814 } 1815 1816 static int pn533_activate_target(struct nfc_dev *nfc_dev, 1817 struct nfc_target *target, u32 protocol) 1818 { 1819 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1820 int rc; 1821 1822 dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol); 1823 1824 if (dev->poll_mod_count) { 1825 nfc_err(dev->dev, 1826 "Cannot activate while polling\n"); 1827 return -EBUSY; 1828 } 1829 1830 if (dev->tgt_active_prot) { 1831 nfc_err(dev->dev, 1832 "There is already an active target\n"); 1833 return -EBUSY; 1834 } 1835 1836 if (!dev->tgt_available_prots) { 1837 nfc_err(dev->dev, 1838 "There is no available target to activate\n"); 1839 return -EINVAL; 1840 } 1841 1842 if (!(dev->tgt_available_prots & (1 << protocol))) { 1843 nfc_err(dev->dev, 1844 "Target doesn't support requested proto %u\n", 1845 protocol); 1846 return -EINVAL; 1847 } 1848 1849 if (protocol == NFC_PROTO_NFC_DEP) { 1850 rc = pn533_activate_target_nfcdep(dev); 1851 if (rc) { 1852 nfc_err(dev->dev, 1853 "Activating target with DEP failed %d\n", rc); 1854 return rc; 1855 } 1856 } 1857 1858 dev->tgt_active_prot = protocol; 1859 dev->tgt_available_prots = 0; 1860 1861 return 0; 1862 } 1863 1864 static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg, 1865 struct sk_buff *resp) 1866 { 1867 int rc = 0; 1868 1869 dev_dbg(dev->dev, "%s\n", __func__); 1870 1871 if (IS_ERR(resp)) { 1872 rc = PTR_ERR(resp); 1873 1874 nfc_err(dev->dev, "Target release error %d\n", rc); 1875 1876 return rc; 1877 } 1878 1879 rc = resp->data[0] & PN533_CMD_RET_MASK; 1880 if (rc != PN533_CMD_RET_SUCCESS) 1881 nfc_err(dev->dev, 1882 "Error 0x%x when releasing the target\n", rc); 1883 1884 dev_kfree_skb(resp); 1885 return rc; 1886 } 1887 1888 static void pn533_deactivate_target(struct nfc_dev *nfc_dev, 1889 struct nfc_target *target, u8 mode) 1890 { 1891 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1892 struct sk_buff *skb; 1893 int rc; 1894 1895 dev_dbg(dev->dev, "%s\n", __func__); 1896 1897 if (!dev->tgt_active_prot) { 1898 nfc_err(dev->dev, "There is no active target\n"); 1899 return; 1900 } 1901 1902 dev->tgt_active_prot = 0; 1903 skb_queue_purge(&dev->resp_q); 1904 1905 skb = pn533_alloc_skb(dev, sizeof(u8)); 1906 if (!skb) 1907 return; 1908 1909 skb_put_u8(skb, 1); /* TG*/ 1910 1911 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb, 1912 pn533_deactivate_target_complete, NULL); 1913 if (rc < 0) { 1914 dev_kfree_skb(skb); 1915 nfc_err(dev->dev, "Target release error %d\n", rc); 1916 } 1917 } 1918 1919 1920 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg, 1921 struct sk_buff *resp) 1922 { 1923 struct pn533_cmd_jump_dep_response *rsp; 1924 u8 target_gt_len; 1925 int rc; 1926 u8 active = *(u8 *)arg; 1927 1928 kfree(arg); 1929 1930 if (IS_ERR(resp)) 1931 return PTR_ERR(resp); 1932 1933 if (dev->tgt_available_prots && 1934 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) { 1935 nfc_err(dev->dev, 1936 "The target does not support DEP\n"); 1937 rc = -EINVAL; 1938 goto error; 1939 } 1940 1941 rsp = (struct pn533_cmd_jump_dep_response *)resp->data; 1942 1943 rc = rsp->status & PN533_CMD_RET_MASK; 1944 if (rc != PN533_CMD_RET_SUCCESS) { 1945 nfc_err(dev->dev, 1946 "Bringing DEP link up failed (error 0x%x)\n", rc); 1947 goto error; 1948 } 1949 1950 if (!dev->tgt_available_prots) { 1951 struct nfc_target nfc_target; 1952 1953 dev_dbg(dev->dev, "Creating new target\n"); 1954 1955 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK; 1956 nfc_target.nfcid1_len = 10; 1957 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len); 1958 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1); 1959 if (rc) 1960 goto error; 1961 1962 dev->tgt_available_prots = 0; 1963 } 1964 1965 dev->tgt_active_prot = NFC_PROTO_NFC_DEP; 1966 1967 /* ATR_RES general bytes are located at offset 17 */ 1968 target_gt_len = resp->len - 17; 1969 rc = nfc_set_remote_general_bytes(dev->nfc_dev, 1970 rsp->gt, target_gt_len); 1971 if (rc == 0) 1972 rc = nfc_dep_link_is_up(dev->nfc_dev, 1973 dev->nfc_dev->targets[0].idx, 1974 !active, NFC_RF_INITIATOR); 1975 1976 error: 1977 dev_kfree_skb(resp); 1978 return rc; 1979 } 1980 1981 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf); 1982 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target, 1983 u8 comm_mode, u8 *gb, size_t gb_len) 1984 { 1985 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 1986 struct sk_buff *skb; 1987 int rc, skb_len; 1988 u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE]; 1989 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3}; 1990 1991 dev_dbg(dev->dev, "%s\n", __func__); 1992 1993 if (dev->poll_mod_count) { 1994 nfc_err(dev->dev, 1995 "Cannot bring the DEP link up while polling\n"); 1996 return -EBUSY; 1997 } 1998 1999 if (dev->tgt_active_prot) { 2000 nfc_err(dev->dev, 2001 "There is already an active target\n"); 2002 return -EBUSY; 2003 } 2004 2005 skb_len = 3 + gb_len; /* ActPass + BR + Next */ 2006 skb_len += PASSIVE_DATA_LEN; 2007 2008 /* NFCID3 */ 2009 skb_len += NFC_NFCID3_MAXSIZE; 2010 if (target && !target->nfcid2_len) { 2011 nfcid3[0] = 0x1; 2012 nfcid3[1] = 0xfe; 2013 get_random_bytes(nfcid3 + 2, 6); 2014 } 2015 2016 skb = pn533_alloc_skb(dev, skb_len); 2017 if (!skb) 2018 return -ENOMEM; 2019 2020 skb_put_u8(skb, !comm_mode); /* ActPass */ 2021 skb_put_u8(skb, 0x02); /* 424 kbps */ 2022 2023 next = skb_put(skb, 1); /* Next */ 2024 *next = 0; 2025 2026 /* Copy passive data */ 2027 skb_put_data(skb, passive_data, PASSIVE_DATA_LEN); 2028 *next |= 1; 2029 2030 /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */ 2031 if (target && target->nfcid2_len) 2032 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2, 2033 target->nfcid2_len); 2034 else 2035 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE); 2036 *next |= 2; 2037 2038 if (gb != NULL && gb_len > 0) { 2039 skb_put_data(skb, gb, gb_len); 2040 *next |= 4; /* We have some Gi */ 2041 } else { 2042 *next = 0; 2043 } 2044 2045 arg = kmalloc(sizeof(*arg), GFP_KERNEL); 2046 if (!arg) { 2047 dev_kfree_skb(skb); 2048 return -ENOMEM; 2049 } 2050 2051 *arg = !comm_mode; 2052 2053 pn533_rf_field(dev->nfc_dev, 0); 2054 2055 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb, 2056 pn533_in_dep_link_up_complete, arg); 2057 2058 if (rc < 0) { 2059 dev_kfree_skb(skb); 2060 kfree(arg); 2061 } 2062 2063 return rc; 2064 } 2065 2066 static int pn533_dep_link_down(struct nfc_dev *nfc_dev) 2067 { 2068 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2069 2070 dev_dbg(dev->dev, "%s\n", __func__); 2071 2072 pn533_poll_reset_mod_list(dev); 2073 2074 if (dev->tgt_mode || dev->tgt_active_prot) 2075 dev->phy_ops->abort_cmd(dev, GFP_KERNEL); 2076 2077 dev->tgt_active_prot = 0; 2078 dev->tgt_mode = 0; 2079 2080 skb_queue_purge(&dev->resp_q); 2081 2082 return 0; 2083 } 2084 2085 struct pn533_data_exchange_arg { 2086 data_exchange_cb_t cb; 2087 void *cb_context; 2088 }; 2089 2090 static struct sk_buff *pn533_build_response(struct pn533 *dev) 2091 { 2092 struct sk_buff *skb, *tmp, *t; 2093 unsigned int skb_len = 0, tmp_len = 0; 2094 2095 dev_dbg(dev->dev, "%s\n", __func__); 2096 2097 if (skb_queue_empty(&dev->resp_q)) 2098 return NULL; 2099 2100 if (skb_queue_len(&dev->resp_q) == 1) { 2101 skb = skb_dequeue(&dev->resp_q); 2102 goto out; 2103 } 2104 2105 skb_queue_walk_safe(&dev->resp_q, tmp, t) 2106 skb_len += tmp->len; 2107 2108 dev_dbg(dev->dev, "%s total length %d\n", 2109 __func__, skb_len); 2110 2111 skb = alloc_skb(skb_len, GFP_KERNEL); 2112 if (skb == NULL) 2113 goto out; 2114 2115 skb_put(skb, skb_len); 2116 2117 skb_queue_walk_safe(&dev->resp_q, tmp, t) { 2118 memcpy(skb->data + tmp_len, tmp->data, tmp->len); 2119 tmp_len += tmp->len; 2120 } 2121 2122 out: 2123 skb_queue_purge(&dev->resp_q); 2124 2125 return skb; 2126 } 2127 2128 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg, 2129 struct sk_buff *resp) 2130 { 2131 struct pn533_data_exchange_arg *arg = _arg; 2132 struct sk_buff *skb; 2133 int rc = 0; 2134 u8 status, ret, mi; 2135 2136 dev_dbg(dev->dev, "%s\n", __func__); 2137 2138 if (IS_ERR(resp)) { 2139 rc = PTR_ERR(resp); 2140 goto _error; 2141 } 2142 2143 status = resp->data[0]; 2144 ret = status & PN533_CMD_RET_MASK; 2145 mi = status & PN533_CMD_MI_MASK; 2146 2147 skb_pull(resp, sizeof(status)); 2148 2149 if (ret != PN533_CMD_RET_SUCCESS) { 2150 nfc_err(dev->dev, 2151 "Exchanging data failed (error 0x%x)\n", ret); 2152 rc = -EIO; 2153 goto error; 2154 } 2155 2156 skb_queue_tail(&dev->resp_q, resp); 2157 2158 if (mi) { 2159 dev->cmd_complete_mi_arg = arg; 2160 queue_work(dev->wq, &dev->mi_rx_work); 2161 return -EINPROGRESS; 2162 } 2163 2164 /* Prepare for the next round */ 2165 if (skb_queue_len(&dev->fragment_skb) > 0) { 2166 dev->cmd_complete_dep_arg = arg; 2167 queue_work(dev->wq, &dev->mi_tx_work); 2168 2169 return -EINPROGRESS; 2170 } 2171 2172 skb = pn533_build_response(dev); 2173 if (!skb) { 2174 rc = -ENOMEM; 2175 goto error; 2176 } 2177 2178 arg->cb(arg->cb_context, skb, 0); 2179 kfree(arg); 2180 return 0; 2181 2182 error: 2183 dev_kfree_skb(resp); 2184 _error: 2185 skb_queue_purge(&dev->resp_q); 2186 arg->cb(arg->cb_context, NULL, rc); 2187 kfree(arg); 2188 return rc; 2189 } 2190 2191 /* 2192 * Receive an incoming pn533 frame. skb contains only header and payload. 2193 * If skb == NULL, it is a notification that the link below is dead. 2194 */ 2195 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status) 2196 { 2197 if (!dev->cmd) 2198 goto sched_wq; 2199 2200 dev->cmd->status = status; 2201 2202 if (status != 0) { 2203 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status); 2204 goto sched_wq; 2205 } 2206 2207 if (skb == NULL) { 2208 pr_err("NULL Frame -> link is dead\n"); 2209 goto sched_wq; 2210 } 2211 2212 if (pn533_rx_frame_is_ack(skb->data)) { 2213 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__); 2214 dev_kfree_skb(skb); 2215 return; 2216 } 2217 2218 print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data, 2219 dev->ops->rx_frame_size(skb->data), false); 2220 2221 if (!dev->ops->rx_is_frame_valid(skb->data, dev)) { 2222 nfc_err(dev->dev, "Received an invalid frame\n"); 2223 dev->cmd->status = -EIO; 2224 } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) { 2225 nfc_err(dev->dev, "It it not the response to the last command\n"); 2226 dev->cmd->status = -EIO; 2227 } 2228 2229 dev->cmd->resp = skb; 2230 2231 sched_wq: 2232 queue_work(dev->wq, &dev->cmd_complete_work); 2233 } 2234 EXPORT_SYMBOL(pn533_recv_frame); 2235 2236 /* Split the Tx skb into small chunks */ 2237 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb) 2238 { 2239 struct sk_buff *frag; 2240 int frag_size; 2241 2242 do { 2243 /* Remaining size */ 2244 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN) 2245 frag_size = PN533_CMD_DATAFRAME_MAXLEN; 2246 else 2247 frag_size = skb->len; 2248 2249 /* Allocate and reserve */ 2250 frag = pn533_alloc_skb(dev, frag_size); 2251 if (!frag) { 2252 skb_queue_purge(&dev->fragment_skb); 2253 break; 2254 } 2255 2256 if (!dev->tgt_mode) { 2257 /* Reserve the TG/MI byte */ 2258 skb_reserve(frag, 1); 2259 2260 /* MI + TG */ 2261 if (frag_size == PN533_CMD_DATAFRAME_MAXLEN) 2262 *(u8 *)skb_push(frag, sizeof(u8)) = 2263 (PN533_CMD_MI_MASK | 1); 2264 else 2265 *(u8 *)skb_push(frag, sizeof(u8)) = 1; /* TG */ 2266 } 2267 2268 skb_put_data(frag, skb->data, frag_size); 2269 2270 /* Reduce the size of incoming buffer */ 2271 skb_pull(skb, frag_size); 2272 2273 /* Add this to skb_queue */ 2274 skb_queue_tail(&dev->fragment_skb, frag); 2275 2276 } while (skb->len > 0); 2277 2278 dev_kfree_skb(skb); 2279 2280 return skb_queue_len(&dev->fragment_skb); 2281 } 2282 2283 static int pn533_transceive(struct nfc_dev *nfc_dev, 2284 struct nfc_target *target, struct sk_buff *skb, 2285 data_exchange_cb_t cb, void *cb_context) 2286 { 2287 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2288 struct pn533_data_exchange_arg *arg = NULL; 2289 int rc; 2290 2291 dev_dbg(dev->dev, "%s\n", __func__); 2292 2293 if (!dev->tgt_active_prot) { 2294 nfc_err(dev->dev, 2295 "Can't exchange data if there is no active target\n"); 2296 rc = -EINVAL; 2297 goto error; 2298 } 2299 2300 arg = kmalloc(sizeof(*arg), GFP_KERNEL); 2301 if (!arg) { 2302 rc = -ENOMEM; 2303 goto error; 2304 } 2305 2306 arg->cb = cb; 2307 arg->cb_context = cb_context; 2308 2309 switch (dev->device_type) { 2310 case PN533_DEVICE_PASORI: 2311 if (dev->tgt_active_prot == NFC_PROTO_FELICA) { 2312 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU, 2313 skb, 2314 pn533_data_exchange_complete, 2315 arg); 2316 2317 break; 2318 } 2319 fallthrough; 2320 default: 2321 /* jumbo frame ? */ 2322 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { 2323 rc = pn533_fill_fragment_skbs(dev, skb); 2324 if (rc <= 0) 2325 goto error; 2326 2327 skb = skb_dequeue(&dev->fragment_skb); 2328 if (!skb) { 2329 rc = -EIO; 2330 goto error; 2331 } 2332 } else { 2333 *(u8 *)skb_push(skb, sizeof(u8)) = 1; /* TG */ 2334 } 2335 2336 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE, 2337 skb, pn533_data_exchange_complete, 2338 arg); 2339 2340 break; 2341 } 2342 2343 if (rc < 0) /* rc from send_async */ 2344 goto error; 2345 2346 return 0; 2347 2348 error: 2349 kfree(arg); 2350 dev_kfree_skb(skb); 2351 return rc; 2352 } 2353 2354 static int pn533_tm_send_complete(struct pn533 *dev, void *arg, 2355 struct sk_buff *resp) 2356 { 2357 u8 status; 2358 2359 dev_dbg(dev->dev, "%s\n", __func__); 2360 2361 if (IS_ERR(resp)) 2362 return PTR_ERR(resp); 2363 2364 status = resp->data[0]; 2365 2366 /* Prepare for the next round */ 2367 if (skb_queue_len(&dev->fragment_skb) > 0) { 2368 queue_work(dev->wq, &dev->mi_tm_tx_work); 2369 return -EINPROGRESS; 2370 } 2371 dev_kfree_skb(resp); 2372 2373 if (status != 0) { 2374 nfc_tm_deactivated(dev->nfc_dev); 2375 2376 dev->tgt_mode = 0; 2377 2378 return 0; 2379 } 2380 2381 queue_work(dev->wq, &dev->tg_work); 2382 2383 return 0; 2384 } 2385 2386 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb) 2387 { 2388 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2389 int rc; 2390 2391 dev_dbg(dev->dev, "%s\n", __func__); 2392 2393 /* let's split in multiple chunks if size's too big */ 2394 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) { 2395 rc = pn533_fill_fragment_skbs(dev, skb); 2396 if (rc <= 0) 2397 goto error; 2398 2399 /* get the first skb */ 2400 skb = skb_dequeue(&dev->fragment_skb); 2401 if (!skb) { 2402 rc = -EIO; 2403 goto error; 2404 } 2405 2406 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb, 2407 pn533_tm_send_complete, NULL); 2408 } else { 2409 /* Send th skb */ 2410 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb, 2411 pn533_tm_send_complete, NULL); 2412 } 2413 2414 error: 2415 if (rc < 0) { 2416 dev_kfree_skb(skb); 2417 skb_queue_purge(&dev->fragment_skb); 2418 } 2419 2420 return rc; 2421 } 2422 2423 static void pn533_wq_mi_recv(struct work_struct *work) 2424 { 2425 struct pn533 *dev = container_of(work, struct pn533, mi_rx_work); 2426 struct sk_buff *skb; 2427 int rc; 2428 2429 dev_dbg(dev->dev, "%s\n", __func__); 2430 2431 skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN); 2432 if (!skb) 2433 goto error; 2434 2435 switch (dev->device_type) { 2436 case PN533_DEVICE_PASORI: 2437 if (dev->tgt_active_prot == NFC_PROTO_FELICA) { 2438 rc = pn533_send_cmd_direct_async(dev, 2439 PN533_CMD_IN_COMM_THRU, 2440 skb, 2441 pn533_data_exchange_complete, 2442 dev->cmd_complete_mi_arg); 2443 2444 break; 2445 } 2446 fallthrough; 2447 default: 2448 skb_put_u8(skb, 1); /*TG*/ 2449 2450 rc = pn533_send_cmd_direct_async(dev, 2451 PN533_CMD_IN_DATA_EXCHANGE, 2452 skb, 2453 pn533_data_exchange_complete, 2454 dev->cmd_complete_mi_arg); 2455 2456 break; 2457 } 2458 2459 if (rc == 0) /* success */ 2460 return; 2461 2462 nfc_err(dev->dev, 2463 "Error %d when trying to perform data_exchange\n", rc); 2464 2465 dev_kfree_skb(skb); 2466 kfree(dev->cmd_complete_mi_arg); 2467 2468 error: 2469 dev->phy_ops->send_ack(dev, GFP_KERNEL); 2470 queue_work(dev->wq, &dev->cmd_work); 2471 } 2472 2473 static void pn533_wq_mi_send(struct work_struct *work) 2474 { 2475 struct pn533 *dev = container_of(work, struct pn533, mi_tx_work); 2476 struct sk_buff *skb; 2477 int rc; 2478 2479 dev_dbg(dev->dev, "%s\n", __func__); 2480 2481 /* Grab the first skb in the queue */ 2482 skb = skb_dequeue(&dev->fragment_skb); 2483 2484 if (skb == NULL) { /* No more data */ 2485 /* Reset the queue for future use */ 2486 skb_queue_head_init(&dev->fragment_skb); 2487 goto error; 2488 } 2489 2490 switch (dev->device_type) { 2491 case PN533_DEVICE_PASORI: 2492 if (dev->tgt_active_prot != NFC_PROTO_FELICA) { 2493 rc = -EIO; 2494 break; 2495 } 2496 2497 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU, 2498 skb, 2499 pn533_data_exchange_complete, 2500 dev->cmd_complete_dep_arg); 2501 2502 break; 2503 2504 default: 2505 /* Still some fragments? */ 2506 rc = pn533_send_cmd_direct_async(dev, 2507 PN533_CMD_IN_DATA_EXCHANGE, 2508 skb, 2509 pn533_data_exchange_complete, 2510 dev->cmd_complete_dep_arg); 2511 2512 break; 2513 } 2514 2515 if (rc == 0) /* success */ 2516 return; 2517 2518 nfc_err(dev->dev, 2519 "Error %d when trying to perform data_exchange\n", rc); 2520 2521 dev_kfree_skb(skb); 2522 kfree(dev->cmd_complete_dep_arg); 2523 2524 error: 2525 dev->phy_ops->send_ack(dev, GFP_KERNEL); 2526 queue_work(dev->wq, &dev->cmd_work); 2527 } 2528 2529 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata, 2530 u8 cfgdata_len) 2531 { 2532 struct sk_buff *skb; 2533 struct sk_buff *resp; 2534 int skb_len; 2535 2536 dev_dbg(dev->dev, "%s\n", __func__); 2537 2538 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */ 2539 2540 skb = pn533_alloc_skb(dev, skb_len); 2541 if (!skb) 2542 return -ENOMEM; 2543 2544 skb_put_u8(skb, cfgitem); 2545 skb_put_data(skb, cfgdata, cfgdata_len); 2546 2547 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb); 2548 if (IS_ERR(resp)) 2549 return PTR_ERR(resp); 2550 2551 dev_kfree_skb(resp); 2552 return 0; 2553 } 2554 2555 static int pn533_get_firmware_version(struct pn533 *dev, 2556 struct pn533_fw_version *fv) 2557 { 2558 struct sk_buff *skb; 2559 struct sk_buff *resp; 2560 2561 skb = pn533_alloc_skb(dev, 0); 2562 if (!skb) 2563 return -ENOMEM; 2564 2565 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb); 2566 if (IS_ERR(resp)) 2567 return PTR_ERR(resp); 2568 2569 fv->ic = resp->data[0]; 2570 fv->ver = resp->data[1]; 2571 fv->rev = resp->data[2]; 2572 fv->support = resp->data[3]; 2573 2574 dev_kfree_skb(resp); 2575 return 0; 2576 } 2577 2578 static int pn533_pasori_fw_reset(struct pn533 *dev) 2579 { 2580 struct sk_buff *skb; 2581 struct sk_buff *resp; 2582 2583 dev_dbg(dev->dev, "%s\n", __func__); 2584 2585 skb = pn533_alloc_skb(dev, sizeof(u8)); 2586 if (!skb) 2587 return -ENOMEM; 2588 2589 skb_put_u8(skb, 0x1); 2590 2591 resp = pn533_send_cmd_sync(dev, 0x18, skb); 2592 if (IS_ERR(resp)) 2593 return PTR_ERR(resp); 2594 2595 dev_kfree_skb(resp); 2596 2597 return 0; 2598 } 2599 2600 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf) 2601 { 2602 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2603 u8 rf_field = !!rf; 2604 int rc; 2605 2606 rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA; 2607 2608 rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD, 2609 (u8 *)&rf_field, 1); 2610 if (rc) { 2611 nfc_err(dev->dev, "Error on setting RF field\n"); 2612 return rc; 2613 } 2614 2615 return 0; 2616 } 2617 2618 static int pn532_sam_configuration(struct nfc_dev *nfc_dev) 2619 { 2620 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2621 struct sk_buff *skb; 2622 struct sk_buff *resp; 2623 2624 skb = pn533_alloc_skb(dev, 1); 2625 if (!skb) 2626 return -ENOMEM; 2627 2628 skb_put_u8(skb, 0x01); 2629 2630 resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb); 2631 if (IS_ERR(resp)) 2632 return PTR_ERR(resp); 2633 2634 dev_kfree_skb(resp); 2635 return 0; 2636 } 2637 2638 static int pn533_dev_up(struct nfc_dev *nfc_dev) 2639 { 2640 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2641 int rc; 2642 2643 if (dev->phy_ops->dev_up) { 2644 rc = dev->phy_ops->dev_up(dev); 2645 if (rc) 2646 return rc; 2647 } 2648 2649 if ((dev->device_type == PN533_DEVICE_PN532) || 2650 (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) { 2651 rc = pn532_sam_configuration(nfc_dev); 2652 2653 if (rc) 2654 return rc; 2655 } 2656 2657 return pn533_rf_field(nfc_dev, 1); 2658 } 2659 2660 static int pn533_dev_down(struct nfc_dev *nfc_dev) 2661 { 2662 struct pn533 *dev = nfc_get_drvdata(nfc_dev); 2663 int ret; 2664 2665 ret = pn533_rf_field(nfc_dev, 0); 2666 if (dev->phy_ops->dev_down && !ret) 2667 ret = dev->phy_ops->dev_down(dev); 2668 2669 return ret; 2670 } 2671 2672 static struct nfc_ops pn533_nfc_ops = { 2673 .dev_up = pn533_dev_up, 2674 .dev_down = pn533_dev_down, 2675 .dep_link_up = pn533_dep_link_up, 2676 .dep_link_down = pn533_dep_link_down, 2677 .start_poll = pn533_start_poll, 2678 .stop_poll = pn533_stop_poll, 2679 .activate_target = pn533_activate_target, 2680 .deactivate_target = pn533_deactivate_target, 2681 .im_transceive = pn533_transceive, 2682 .tm_send = pn533_tm_send, 2683 }; 2684 2685 static int pn533_setup(struct pn533 *dev) 2686 { 2687 struct pn533_config_max_retries max_retries; 2688 struct pn533_config_timing timing; 2689 u8 pasori_cfg[3] = {0x08, 0x01, 0x08}; 2690 int rc; 2691 2692 switch (dev->device_type) { 2693 case PN533_DEVICE_STD: 2694 case PN533_DEVICE_PASORI: 2695 case PN533_DEVICE_ACR122U: 2696 case PN533_DEVICE_PN532: 2697 case PN533_DEVICE_PN532_AUTOPOLL: 2698 max_retries.mx_rty_atr = 0x2; 2699 max_retries.mx_rty_psl = 0x1; 2700 max_retries.mx_rty_passive_act = 2701 PN533_CONFIG_MAX_RETRIES_NO_RETRY; 2702 2703 timing.rfu = PN533_CONFIG_TIMING_102; 2704 timing.atr_res_timeout = PN533_CONFIG_TIMING_102; 2705 timing.dep_timeout = PN533_CONFIG_TIMING_204; 2706 2707 break; 2708 2709 default: 2710 nfc_err(dev->dev, "Unknown device type %d\n", 2711 dev->device_type); 2712 return -EINVAL; 2713 } 2714 2715 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES, 2716 (u8 *)&max_retries, sizeof(max_retries)); 2717 if (rc) { 2718 nfc_err(dev->dev, 2719 "Error on setting MAX_RETRIES config\n"); 2720 return rc; 2721 } 2722 2723 2724 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING, 2725 (u8 *)&timing, sizeof(timing)); 2726 if (rc) { 2727 nfc_err(dev->dev, "Error on setting RF timings\n"); 2728 return rc; 2729 } 2730 2731 switch (dev->device_type) { 2732 case PN533_DEVICE_STD: 2733 case PN533_DEVICE_PN532: 2734 case PN533_DEVICE_PN532_AUTOPOLL: 2735 break; 2736 2737 case PN533_DEVICE_PASORI: 2738 pn533_pasori_fw_reset(dev); 2739 2740 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI, 2741 pasori_cfg, 3); 2742 if (rc) { 2743 nfc_err(dev->dev, 2744 "Error while settings PASORI config\n"); 2745 return rc; 2746 } 2747 2748 pn533_pasori_fw_reset(dev); 2749 2750 break; 2751 } 2752 2753 return 0; 2754 } 2755 2756 int pn533_finalize_setup(struct pn533 *dev) 2757 { 2758 2759 struct pn533_fw_version fw_ver; 2760 int rc; 2761 2762 memset(&fw_ver, 0, sizeof(fw_ver)); 2763 2764 rc = pn533_get_firmware_version(dev, &fw_ver); 2765 if (rc) { 2766 nfc_err(dev->dev, "Unable to get FW version\n"); 2767 return rc; 2768 } 2769 2770 nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n", 2771 fw_ver.ic, fw_ver.ver, fw_ver.rev); 2772 2773 rc = pn533_setup(dev); 2774 if (rc) 2775 return rc; 2776 2777 return 0; 2778 } 2779 EXPORT_SYMBOL_GPL(pn533_finalize_setup); 2780 2781 struct pn533 *pn53x_common_init(u32 device_type, 2782 enum pn533_protocol_type protocol_type, 2783 void *phy, 2784 struct pn533_phy_ops *phy_ops, 2785 struct pn533_frame_ops *fops, 2786 struct device *dev) 2787 { 2788 struct pn533 *priv; 2789 2790 priv = kzalloc(sizeof(*priv), GFP_KERNEL); 2791 if (!priv) 2792 return ERR_PTR(-ENOMEM); 2793 2794 priv->phy = phy; 2795 priv->phy_ops = phy_ops; 2796 priv->dev = dev; 2797 if (fops != NULL) 2798 priv->ops = fops; 2799 else 2800 priv->ops = &pn533_std_frame_ops; 2801 2802 priv->protocol_type = protocol_type; 2803 priv->device_type = device_type; 2804 2805 mutex_init(&priv->cmd_lock); 2806 2807 INIT_WORK(&priv->cmd_work, pn533_wq_cmd); 2808 INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete); 2809 INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv); 2810 INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send); 2811 INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data); 2812 INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv); 2813 INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send); 2814 INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll); 2815 INIT_WORK(&priv->rf_work, pn533_wq_rf); 2816 priv->wq = alloc_ordered_workqueue("pn533", 0); 2817 if (priv->wq == NULL) 2818 goto error; 2819 2820 timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0); 2821 2822 skb_queue_head_init(&priv->resp_q); 2823 skb_queue_head_init(&priv->fragment_skb); 2824 2825 INIT_LIST_HEAD(&priv->cmd_queue); 2826 return priv; 2827 2828 error: 2829 kfree(priv); 2830 return ERR_PTR(-ENOMEM); 2831 } 2832 EXPORT_SYMBOL_GPL(pn53x_common_init); 2833 2834 void pn53x_common_clean(struct pn533 *priv) 2835 { 2836 struct pn533_cmd *cmd, *n; 2837 2838 flush_delayed_work(&priv->poll_work); 2839 destroy_workqueue(priv->wq); 2840 2841 skb_queue_purge(&priv->resp_q); 2842 2843 del_timer(&priv->listen_timer); 2844 2845 list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) { 2846 list_del(&cmd->queue); 2847 kfree(cmd); 2848 } 2849 2850 kfree(priv); 2851 } 2852 EXPORT_SYMBOL_GPL(pn53x_common_clean); 2853 2854 int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols, 2855 struct device *parent) 2856 { 2857 priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols, 2858 priv->ops->tx_header_len + 2859 PN533_CMD_DATAEXCH_HEAD_LEN, 2860 priv->ops->tx_tail_len); 2861 if (!priv->nfc_dev) 2862 return -ENOMEM; 2863 2864 nfc_set_parent_dev(priv->nfc_dev, parent); 2865 nfc_set_drvdata(priv->nfc_dev, priv); 2866 return 0; 2867 } 2868 EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc); 2869 2870 int pn53x_register_nfc(struct pn533 *priv, u32 protocols, 2871 struct device *parent) 2872 { 2873 int rc; 2874 2875 rc = pn532_i2c_nfc_alloc(priv, protocols, parent); 2876 if (rc) 2877 return rc; 2878 2879 rc = nfc_register_device(priv->nfc_dev); 2880 if (rc) 2881 nfc_free_device(priv->nfc_dev); 2882 2883 return rc; 2884 } 2885 EXPORT_SYMBOL_GPL(pn53x_register_nfc); 2886 2887 void pn53x_unregister_nfc(struct pn533 *priv) 2888 { 2889 nfc_unregister_device(priv->nfc_dev); 2890 nfc_free_device(priv->nfc_dev); 2891 } 2892 EXPORT_SYMBOL_GPL(pn53x_unregister_nfc); 2893 2894 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>"); 2895 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>"); 2896 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>"); 2897 MODULE_DESCRIPTION("PN533 driver ver " VERSION); 2898 MODULE_VERSION(VERSION); 2899 MODULE_LICENSE("GPL"); 2900