drivers/nfc/pn533/pn533.c

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