drivers/nfc/pn533.c

   1 /*
   2  * Copyright (C) 2011 Instituto Nokia de Tecnologia
   3  *
   4  * Authors:
   5  *    Lauro Ramos Venancio <lauro.venancio@openbossa.org>
   6  *    Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the
  20  * Free Software Foundation, Inc.,
  21  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  22  */
  23
  24 #include <linux/device.h>
  25 #include <linux/kernel.h>
  26 #include <linux/module.h>
  27 #include <linux/slab.h>
  28 #include <linux/usb.h>
  29 #include <linux/nfc.h>
  30 #include <linux/netdevice.h>
  31 #include <net/nfc/nfc.h>
  32
  33 #define VERSION "0.1"
  34
  35 #define PN533_VENDOR_ID 0x4CC
  36 #define PN533_PRODUCT_ID 0x2533
  37
  38 #define SCM_VENDOR_ID 0x4E6
  39 #define SCL3711_PRODUCT_ID 0x5591
  40
  41 static const struct usb_device_id pn533_table[] = {
  42         { USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID) },
  43         { USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID) },
  44         { }
  45 };
  46 MODULE_DEVICE_TABLE(usb, pn533_table);
  47
  48 /* frame definitions */
  49 #define PN533_FRAME_TAIL_SIZE 2
  50 #define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \
  51                                 PN533_FRAME_TAIL_SIZE)
  52 #define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1)
  53 #define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen])
  54 #define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
  55
  56 /* start of frame */
  57 #define PN533_SOF 0x00FF
  58
  59 /* frame identifier: in/out/error */
  60 #define PN533_FRAME_IDENTIFIER(f) (f->data[0])
  61 #define PN533_DIR_OUT 0xD4
  62 #define PN533_DIR_IN 0xD5
  63
  64 /* PN533 Commands */
  65 #define PN533_FRAME_CMD(f) (f->data[1])
  66 #define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2])
  67 #define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2)
  68
  69 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
  70 #define PN533_CMD_RF_CONFIGURATION 0x32
  71 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
  72 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
  73 #define PN533_CMD_IN_ATR 0x50
  74 #define PN533_CMD_IN_RELEASE 0x52
  75 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
  76
  77 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
  78
  79 /* PN533 Return codes */
  80 #define PN533_CMD_RET_MASK 0x3F
  81 #define PN533_CMD_MI_MASK 0x40
  82 #define PN533_CMD_RET_SUCCESS 0x00
  83
  84 struct pn533;
  85
  86 typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg,
  87                                         u8 *params, int params_len);
  88
  89 /* structs for pn533 commands */
  90
  91 /* PN533_CMD_GET_FIRMWARE_VERSION */
  92 struct pn533_fw_version {
  93         u8 ic;
  94         u8 ver;
  95         u8 rev;
  96         u8 support;
  97 };
  98
  99 /* PN533_CMD_RF_CONFIGURATION */
 100 #define PN533_CFGITEM_MAX_RETRIES 0x05
 101
 102 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
 103 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
 104
 105 struct pn533_config_max_retries {
 106         u8 mx_rty_atr;
 107         u8 mx_rty_psl;
 108         u8 mx_rty_passive_act;
 109 } __packed;
 110
 111 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
 112
 113 /* felica commands opcode */
 114 #define PN533_FELICA_OPC_SENSF_REQ 0
 115 #define PN533_FELICA_OPC_SENSF_RES 1
 116 /* felica SENSF_REQ parameters */
 117 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
 118 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
 119 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
 120 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
 121
 122 /* type B initiator_data values */
 123 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
 124 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
 125 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
 126
 127 union pn533_cmd_poll_initdata {
 128         struct {
 129                 u8 afi;
 130                 u8 polling_method;
 131         } __packed type_b;
 132         struct {
 133                 u8 opcode;
 134                 __be16 sc;
 135                 u8 rc;
 136                 u8 tsn;
 137         } __packed felica;
 138 };
 139
 140 /* Poll modulations */
 141 enum {
 142         PN533_POLL_MOD_106KBPS_A,
 143         PN533_POLL_MOD_212KBPS_FELICA,
 144         PN533_POLL_MOD_424KBPS_FELICA,
 145         PN533_POLL_MOD_106KBPS_JEWEL,
 146         PN533_POLL_MOD_847KBPS_B,
 147
 148         __PN533_POLL_MOD_AFTER_LAST,
 149 };
 150 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
 151
 152 struct pn533_poll_modulations {
 153         struct {
 154                 u8 maxtg;
 155                 u8 brty;
 156                 union pn533_cmd_poll_initdata initiator_data;
 157         } __packed data;
 158         u8 len;
 159 };
 160
 161 const struct pn533_poll_modulations poll_mod[] = {
 162         [PN533_POLL_MOD_106KBPS_A] = {
 163                 .data = {
 164                         .maxtg = 1,
 165                         .brty = 0,
 166                 },
 167                 .len = 2,
 168         },
 169         [PN533_POLL_MOD_212KBPS_FELICA] = {
 170                 .data = {
 171                         .maxtg = 1,
 172                         .brty = 1,
 173                         .initiator_data.felica = {
 174                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 175                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 176                                 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
 177                                 .tsn = 0,
 178                         },
 179                 },
 180                 .len = 7,
 181         },
 182         [PN533_POLL_MOD_424KBPS_FELICA] = {
 183                 .data = {
 184                         .maxtg = 1,
 185                         .brty = 2,
 186                         .initiator_data.felica = {
 187                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 188                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 189                                 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
 190                                 .tsn = 0,
 191                         },
 192                  },
 193                 .len = 7,
 194         },
 195         [PN533_POLL_MOD_106KBPS_JEWEL] = {
 196                 .data = {
 197                         .maxtg = 1,
 198                         .brty = 4,
 199                 },
 200                 .len = 2,
 201         },
 202         [PN533_POLL_MOD_847KBPS_B] = {
 203                 .data = {
 204                         .maxtg = 1,
 205                         .brty = 8,
 206                         .initiator_data.type_b = {
 207                                 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
 208                                 .polling_method =
 209                                         PN533_TYPE_B_POLL_METHOD_TIMESLOT,
 210                         },
 211                 },
 212                 .len = 3,
 213         },
 214 };
 215
 216 /* PN533_CMD_IN_ATR */
 217
 218 struct pn533_cmd_activate_param {
 219         u8 tg;
 220         u8 next;
 221 } __packed;
 222
 223 struct pn533_cmd_activate_response {
 224         u8 status;
 225         u8 nfcid3t[10];
 226         u8 didt;
 227         u8 bst;
 228         u8 brt;
 229         u8 to;
 230         u8 ppt;
 231         /* optional */
 232         u8 gt[];
 233 } __packed;
 234
 235 /* PN533_CMD_IN_JUMP_FOR_DEP */
 236 struct pn533_cmd_jump_dep {
 237         u8 active;
 238         u8 baud;
 239         u8 next;
 240         u8 gt[];
 241 } __packed;
 242
 243 struct pn533_cmd_jump_dep_response {
 244         u8 status;
 245         u8 tg;
 246         u8 nfcid3t[10];
 247         u8 didt;
 248         u8 bst;
 249         u8 brt;
 250         u8 to;
 251         u8 ppt;
 252         /* optional */
 253         u8 gt[];
 254 } __packed;
 255
 256 struct pn533 {
 257         struct usb_device *udev;
 258         struct usb_interface *interface;
 259         struct nfc_dev *nfc_dev;
 260
 261         struct urb *out_urb;
 262         int out_maxlen;
 263         struct pn533_frame *out_frame;
 264
 265         struct urb *in_urb;
 266         int in_maxlen;
 267         struct pn533_frame *in_frame;
 268
 269         struct sk_buff_head resp_q;
 270
 271         struct workqueue_struct *wq;
 272         struct work_struct cmd_work;
 273         struct work_struct mi_work;
 274         struct pn533_frame *wq_in_frame;
 275         int wq_in_error;
 276
 277         pn533_cmd_complete_t cmd_complete;
 278         void *cmd_complete_arg;
 279         struct semaphore cmd_lock;
 280         u8 cmd;
 281
 282         struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
 283         u8 poll_mod_count;
 284         u8 poll_mod_curr;
 285         u32 poll_protocols;
 286
 287         u8 tgt_available_prots;
 288         u8 tgt_active_prot;
 289 };
 290
 291 struct pn533_frame {
 292         u8 preamble;
 293         __be16 start_frame;
 294         u8 datalen;
 295         u8 datalen_checksum;
 296         u8 data[];
 297 } __packed;
 298
 299 /* The rule: value + checksum = 0 */
 300 static inline u8 pn533_checksum(u8 value)
 301 {
 302         return ~value + 1;
 303 }
 304
 305 /* The rule: sum(data elements) + checksum = 0 */
 306 static u8 pn533_data_checksum(u8 *data, int datalen)
 307 {
 308         u8 sum = 0;
 309         int i;
 310
 311         for (i = 0; i < datalen; i++)
 312                 sum += data[i];
 313
 314         return pn533_checksum(sum);
 315 }
 316
 317 /**
 318  * pn533_tx_frame_ack - create a ack frame
 319  * @frame:      The frame to be set as ack
 320  *
 321  * Ack is different type of standard frame. As a standard frame, it has
 322  * preamble and start_frame. However the checksum of this frame must fail,
 323  * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test
 324  * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack.
 325  * After datalen_checksum field, the postamble is placed.
 326  */
 327 static void pn533_tx_frame_ack(struct pn533_frame *frame)
 328 {
 329         frame->preamble = 0;
 330         frame->start_frame = cpu_to_be16(PN533_SOF);
 331         frame->datalen = 0;
 332         frame->datalen_checksum = 0xFF;
 333         /* data[0] is used as postamble */
 334         frame->data[0] = 0;
 335 }
 336
 337 static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd)
 338 {
 339         frame->preamble = 0;
 340         frame->start_frame = cpu_to_be16(PN533_SOF);
 341         PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT;
 342         PN533_FRAME_CMD(frame) = cmd;
 343         frame->datalen = 2;
 344 }
 345
 346 static void pn533_tx_frame_finish(struct pn533_frame *frame)
 347 {
 348         frame->datalen_checksum = pn533_checksum(frame->datalen);
 349
 350         PN533_FRAME_CHECKSUM(frame) =
 351                 pn533_data_checksum(frame->data, frame->datalen);
 352
 353         PN533_FRAME_POSTAMBLE(frame) = 0;
 354 }
 355
 356 static bool pn533_rx_frame_is_valid(struct pn533_frame *frame)
 357 {
 358         u8 checksum;
 359
 360         if (frame->start_frame != cpu_to_be16(PN533_SOF))
 361                 return false;
 362
 363         checksum = pn533_checksum(frame->datalen);
 364         if (checksum != frame->datalen_checksum)
 365                 return false;
 366
 367         checksum = pn533_data_checksum(frame->data, frame->datalen);
 368         if (checksum != PN533_FRAME_CHECKSUM(frame))
 369                 return false;
 370
 371         return true;
 372 }
 373
 374 static bool pn533_rx_frame_is_ack(struct pn533_frame *frame)
 375 {
 376         if (frame->start_frame != cpu_to_be16(PN533_SOF))
 377                 return false;
 378
 379         if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
 380                 return false;
 381
 382         return true;
 383 }
 384
 385 static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
 386 {
 387         return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
 388 }
 389
 390
 391 static void pn533_wq_cmd_complete(struct work_struct *work)
 392 {
 393         struct pn533 *dev = container_of(work, struct pn533, cmd_work);
 394         struct pn533_frame *in_frame;
 395         int rc;
 396
 397         if (dev == NULL)
 398                 return;
 399
 400         in_frame = dev->wq_in_frame;
 401
 402         if (dev->wq_in_error)
 403                 rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
 404                                                         dev->wq_in_error);
 405         else
 406                 rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
 407                                         PN533_FRAME_CMD_PARAMS_PTR(in_frame),
 408                                         PN533_FRAME_CMD_PARAMS_LEN(in_frame));
 409
 410         if (rc != -EINPROGRESS)
 411                 up(&dev->cmd_lock);
 412 }
 413
 414 static void pn533_recv_response(struct urb *urb)
 415 {
 416         struct pn533 *dev = urb->context;
 417         struct pn533_frame *in_frame;
 418
 419         dev->wq_in_frame = NULL;
 420
 421         switch (urb->status) {
 422         case 0:
 423                 /* success */
 424                 break;
 425         case -ECONNRESET:
 426         case -ENOENT:
 427         case -ESHUTDOWN:
 428                 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
 429                                                 " status: %d", urb->status);
 430                 dev->wq_in_error = urb->status;
 431                 goto sched_wq;
 432         default:
 433                 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
 434                                                         " %d", urb->status);
 435                 dev->wq_in_error = urb->status;
 436                 goto sched_wq;
 437         }
 438
 439         in_frame = dev->in_urb->transfer_buffer;
 440
 441         if (!pn533_rx_frame_is_valid(in_frame)) {
 442                 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
 443                 dev->wq_in_error = -EIO;
 444                 goto sched_wq;
 445         }
 446
 447         if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
 448                 nfc_dev_err(&dev->interface->dev, "The received frame is not "
 449                                                 "response to the last command");
 450                 dev->wq_in_error = -EIO;
 451                 goto sched_wq;
 452         }
 453
 454         nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
 455         dev->wq_in_error = 0;
 456         dev->wq_in_frame = in_frame;
 457
 458 sched_wq:
 459         queue_work(dev->wq, &dev->cmd_work);
 460 }
 461
 462 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
 463 {
 464         dev->in_urb->complete = pn533_recv_response;
 465
 466         return usb_submit_urb(dev->in_urb, flags);
 467 }
 468
 469 static void pn533_recv_ack(struct urb *urb)
 470 {
 471         struct pn533 *dev = urb->context;
 472         struct pn533_frame *in_frame;
 473         int rc;
 474
 475         switch (urb->status) {
 476         case 0:
 477                 /* success */
 478                 break;
 479         case -ECONNRESET:
 480         case -ENOENT:
 481         case -ESHUTDOWN:
 482                 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
 483                                                 " status: %d", urb->status);
 484                 dev->wq_in_error = urb->status;
 485                 goto sched_wq;
 486         default:
 487                 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
 488                                                         " %d", urb->status);
 489                 dev->wq_in_error = urb->status;
 490                 goto sched_wq;
 491         }
 492
 493         in_frame = dev->in_urb->transfer_buffer;
 494
 495         if (!pn533_rx_frame_is_ack(in_frame)) {
 496                 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
 497                 dev->wq_in_error = -EIO;
 498                 goto sched_wq;
 499         }
 500
 501         nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
 502
 503         rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
 504         if (rc) {
 505                 nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with"
 506                                                         " result %d", rc);
 507                 dev->wq_in_error = rc;
 508                 goto sched_wq;
 509         }
 510
 511         return;
 512
 513 sched_wq:
 514         dev->wq_in_frame = NULL;
 515         queue_work(dev->wq, &dev->cmd_work);
 516 }
 517
 518 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
 519 {
 520         dev->in_urb->complete = pn533_recv_ack;
 521
 522         return usb_submit_urb(dev->in_urb, flags);
 523 }
 524
 525 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
 526 {
 527         int rc;
 528
 529         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 530
 531         pn533_tx_frame_ack(dev->out_frame);
 532
 533         dev->out_urb->transfer_buffer = dev->out_frame;
 534         dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
 535         rc = usb_submit_urb(dev->out_urb, flags);
 536
 537         return rc;
 538 }
 539
 540 static int __pn533_send_cmd_frame_async(struct pn533 *dev,
 541                                         struct pn533_frame *out_frame,
 542                                         struct pn533_frame *in_frame,
 543                                         int in_frame_len,
 544                                         pn533_cmd_complete_t cmd_complete,
 545                                         void *arg, gfp_t flags)
 546 {
 547         int rc;
 548
 549         nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
 550                                                 PN533_FRAME_CMD(out_frame));
 551
 552         dev->cmd = PN533_FRAME_CMD(out_frame);
 553         dev->cmd_complete = cmd_complete;
 554         dev->cmd_complete_arg = arg;
 555
 556         dev->out_urb->transfer_buffer = out_frame;
 557         dev->out_urb->transfer_buffer_length =
 558                                 PN533_FRAME_SIZE(out_frame);
 559
 560         dev->in_urb->transfer_buffer = in_frame;
 561         dev->in_urb->transfer_buffer_length = in_frame_len;
 562
 563         rc = usb_submit_urb(dev->out_urb, flags);
 564         if (rc)
 565                 return rc;
 566
 567         rc = pn533_submit_urb_for_ack(dev, flags);
 568         if (rc)
 569                 goto error;
 570
 571         return 0;
 572
 573 error:
 574         usb_unlink_urb(dev->out_urb);
 575         return rc;
 576 }
 577
 578 static int pn533_send_cmd_frame_async(struct pn533 *dev,
 579                                         struct pn533_frame *out_frame,
 580                                         struct pn533_frame *in_frame,
 581                                         int in_frame_len,
 582                                         pn533_cmd_complete_t cmd_complete,
 583                                         void *arg, gfp_t flags)
 584 {
 585         int rc;
 586
 587         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 588
 589         if (down_trylock(&dev->cmd_lock))
 590                 return -EBUSY;
 591
 592         rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
 593                                         in_frame_len, cmd_complete, arg, flags);
 594         if (rc)
 595                 goto error;
 596
 597         return 0;
 598 error:
 599         up(&dev->cmd_lock);
 600         return rc;
 601 }
 602
 603 struct pn533_sync_cmd_response {
 604         int rc;
 605         struct completion done;
 606 };
 607
 608 static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg,
 609                                         u8 *params, int params_len)
 610 {
 611         struct pn533_sync_cmd_response *arg = _arg;
 612
 613         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 614
 615         arg->rc = 0;
 616
 617         if (params_len < 0) /* error */
 618                 arg->rc = params_len;
 619
 620         complete(&arg->done);
 621
 622         return 0;
 623 }
 624
 625 static int pn533_send_cmd_frame_sync(struct pn533 *dev,
 626                                                 struct pn533_frame *out_frame,
 627                                                 struct pn533_frame *in_frame,
 628                                                 int in_frame_len)
 629 {
 630         int rc;
 631         struct pn533_sync_cmd_response arg;
 632
 633         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 634
 635         init_completion(&arg.done);
 636
 637         rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len,
 638                                 pn533_sync_cmd_complete, &arg, GFP_KERNEL);
 639         if (rc)
 640                 return rc;
 641
 642         wait_for_completion(&arg.done);
 643
 644         return arg.rc;
 645 }
 646
 647 static void pn533_send_complete(struct urb *urb)
 648 {
 649         struct pn533 *dev = urb->context;
 650
 651         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 652
 653         switch (urb->status) {
 654         case 0:
 655                 /* success */
 656                 break;
 657         case -ECONNRESET:
 658         case -ENOENT:
 659         case -ESHUTDOWN:
 660                 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
 661                                                 " status: %d", urb->status);
 662                 break;
 663         default:
 664                 nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:"
 665                                                         " %d", urb->status);
 666         }
 667 }
 668
 669 struct pn533_target_type_a {
 670         __be16 sens_res;
 671         u8 sel_res;
 672         u8 nfcid_len;
 673         u8 nfcid_data[];
 674 } __packed;
 675
 676
 677 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
 678 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
 679 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
 680
 681 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
 682 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
 683
 684 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
 685 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
 686
 687 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
 688 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
 689 #define PN533_TYPE_A_SEL_PROT_DEP 2
 690 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
 691
 692 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
 693                                                         int target_data_len)
 694 {
 695         u8 ssd;
 696         u8 platconf;
 697
 698         if (target_data_len < sizeof(struct pn533_target_type_a))
 699                 return false;
 700
 701         /* The lenght check of nfcid[] and ats[] are not being performed because
 702            the values are not being used */
 703
 704         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
 705         ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
 706         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
 707
 708         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 709                         platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
 710                         (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 711                         platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
 712                 return false;
 713
 714         /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
 715         if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
 716                 return false;
 717
 718         return true;
 719 }
 720
 721 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
 722                                                         int tgt_data_len)
 723 {
 724         struct pn533_target_type_a *tgt_type_a;
 725
 726         tgt_type_a = (struct pn533_target_type_a *) tgt_data;
 727
 728         if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
 729                 return -EPROTO;
 730
 731         switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
 732         case PN533_TYPE_A_SEL_PROT_MIFARE:
 733                 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
 734                 break;
 735         case PN533_TYPE_A_SEL_PROT_ISO14443:
 736                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
 737                 break;
 738         case PN533_TYPE_A_SEL_PROT_DEP:
 739                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
 740                 break;
 741         case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
 742                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
 743                                                         NFC_PROTO_NFC_DEP_MASK;
 744                 break;
 745         }
 746
 747         nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
 748         nfc_tgt->sel_res = tgt_type_a->sel_res;
 749         nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
 750         memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
 751
 752         return 0;
 753 }
 754
 755 struct pn533_target_felica {
 756         u8 pol_res;
 757         u8 opcode;
 758         u8 nfcid2[8];
 759         u8 pad[8];
 760         /* optional */
 761         u8 syst_code[];
 762 } __packed;
 763
 764 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
 765 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
 766
 767 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
 768                                                         int target_data_len)
 769 {
 770         if (target_data_len < sizeof(struct pn533_target_felica))
 771                 return false;
 772
 773         if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
 774                 return false;
 775
 776         return true;
 777 }
 778
 779 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
 780                                                         int tgt_data_len)
 781 {
 782         struct pn533_target_felica *tgt_felica;
 783
 784         tgt_felica = (struct pn533_target_felica *) tgt_data;
 785
 786         if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
 787                 return -EPROTO;
 788
 789         if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 &&
 790                                         tgt_felica->nfcid2[1] ==
 791                                         PN533_FELICA_SENSF_NFCID2_DEP_B2)
 792                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
 793         else
 794                 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
 795
 796         memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
 797         nfc_tgt->sensf_res_len = 9;
 798
 799         return 0;
 800 }
 801
 802 struct pn533_target_jewel {
 803         __be16 sens_res;
 804         u8 jewelid[4];
 805 } __packed;
 806
 807 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
 808                                                         int target_data_len)
 809 {
 810         u8 ssd;
 811         u8 platconf;
 812
 813         if (target_data_len < sizeof(struct pn533_target_jewel))
 814                 return false;
 815
 816         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
 817         ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
 818         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
 819
 820         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 821                         platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
 822                         (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 823                         platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
 824                 return false;
 825
 826         return true;
 827 }
 828
 829 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
 830                                                         int tgt_data_len)
 831 {
 832         struct pn533_target_jewel *tgt_jewel;
 833
 834         tgt_jewel = (struct pn533_target_jewel *) tgt_data;
 835
 836         if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
 837                 return -EPROTO;
 838
 839         nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
 840         nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
 841         nfc_tgt->nfcid1_len = 4;
 842         memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
 843
 844         return 0;
 845 }
 846
 847 struct pn533_type_b_prot_info {
 848         u8 bitrate;
 849         u8 fsci_type;
 850         u8 fwi_adc_fo;
 851 } __packed;
 852
 853 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
 854 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
 855 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
 856
 857 struct pn533_type_b_sens_res {
 858         u8 opcode;
 859         u8 nfcid[4];
 860         u8 appdata[4];
 861         struct pn533_type_b_prot_info prot_info;
 862 } __packed;
 863
 864 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
 865
 866 struct pn533_target_type_b {
 867         struct pn533_type_b_sens_res sensb_res;
 868         u8 attrib_res_len;
 869         u8 attrib_res[];
 870 } __packed;
 871
 872 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
 873                                                         int target_data_len)
 874 {
 875         if (target_data_len < sizeof(struct pn533_target_type_b))
 876                 return false;
 877
 878         if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
 879                 return false;
 880
 881         if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
 882                                                 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
 883                 return false;
 884
 885         return true;
 886 }
 887
 888 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
 889                                                         int tgt_data_len)
 890 {
 891         struct pn533_target_type_b *tgt_type_b;
 892
 893         tgt_type_b = (struct pn533_target_type_b *) tgt_data;
 894
 895         if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
 896                 return -EPROTO;
 897
 898         nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
 899
 900         return 0;
 901 }
 902
 903 struct pn533_poll_response {
 904         u8 nbtg;
 905         u8 tg;
 906         u8 target_data[];
 907 } __packed;
 908
 909 static int pn533_target_found(struct pn533 *dev,
 910                         struct pn533_poll_response *resp, int resp_len)
 911 {
 912         int target_data_len;
 913         struct nfc_target nfc_tgt;
 914         int rc;
 915
 916         nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
 917                                                         dev->poll_mod_curr);
 918
 919         if (resp->tg != 1)
 920                 return -EPROTO;
 921
 922         memset(&nfc_tgt, 0, sizeof(struct nfc_target));
 923
 924         target_data_len = resp_len - sizeof(struct pn533_poll_response);
 925
 926         switch (dev->poll_mod_curr) {
 927         case PN533_POLL_MOD_106KBPS_A:
 928                 rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
 929                                                         target_data_len);
 930                 break;
 931         case PN533_POLL_MOD_212KBPS_FELICA:
 932         case PN533_POLL_MOD_424KBPS_FELICA:
 933                 rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
 934                                                         target_data_len);
 935                 break;
 936         case PN533_POLL_MOD_106KBPS_JEWEL:
 937                 rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
 938                                                         target_data_len);
 939                 break;
 940         case PN533_POLL_MOD_847KBPS_B:
 941                 rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
 942                                                         target_data_len);
 943                 break;
 944         default:
 945                 nfc_dev_err(&dev->interface->dev, "Unknown current poll"
 946                                                                 " modulation");
 947                 return -EPROTO;
 948         }
 949
 950         if (rc)
 951                 return rc;
 952
 953         if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
 954                 nfc_dev_dbg(&dev->interface->dev, "The target found does not"
 955                                                 " have the desired protocol");
 956                 return -EAGAIN;
 957         }
 958
 959         nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
 960                                         "0x%x", nfc_tgt.supported_protocols);
 961
 962         dev->tgt_available_prots = nfc_tgt.supported_protocols;
 963
 964         nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
 965
 966         return 0;
 967 }
 968
 969 static void pn533_poll_reset_mod_list(struct pn533 *dev)
 970 {
 971         dev->poll_mod_count = 0;
 972 }
 973
 974 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
 975 {
 976         dev->poll_mod_active[dev->poll_mod_count] =
 977                 (struct pn533_poll_modulations *) &poll_mod[mod_index];
 978         dev->poll_mod_count++;
 979 }
 980
 981 static void pn533_poll_create_mod_list(struct pn533 *dev, u32 protocols)
 982 {
 983         pn533_poll_reset_mod_list(dev);
 984
 985         if (protocols & NFC_PROTO_MIFARE_MASK
 986                                         || protocols & NFC_PROTO_ISO14443_MASK
 987                                         || protocols & NFC_PROTO_NFC_DEP_MASK)
 988                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
 989
 990         if (protocols & NFC_PROTO_FELICA_MASK
 991                                         || protocols & NFC_PROTO_NFC_DEP_MASK) {
 992                 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
 993                 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
 994         }
 995
 996         if (protocols & NFC_PROTO_JEWEL_MASK)
 997                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
 998
 999         if (protocols & NFC_PROTO_ISO14443_MASK)
1000                 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1001 }
1002
1003 static void pn533_start_poll_frame(struct pn533_frame *frame,
1004                                         struct pn533_poll_modulations *mod)
1005 {
1006
1007         pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
1008
1009         memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
1010         frame->datalen += mod->len;
1011
1012         pn533_tx_frame_finish(frame);
1013 }
1014
1015 static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
1016                                                 u8 *params, int params_len)
1017 {
1018         struct pn533_poll_response *resp;
1019         struct pn533_poll_modulations *next_mod;
1020         int rc;
1021
1022         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1023
1024         if (params_len == -ENOENT) {
1025                 nfc_dev_dbg(&dev->interface->dev, "Polling operation has been"
1026                                                                 " stopped");
1027                 goto stop_poll;
1028         }
1029
1030         if (params_len < 0) {
1031                 nfc_dev_err(&dev->interface->dev, "Error %d when running poll",
1032                                                                 params_len);
1033                 goto stop_poll;
1034         }
1035
1036         resp = (struct pn533_poll_response *) params;
1037         if (resp->nbtg) {
1038                 rc = pn533_target_found(dev, resp, params_len);
1039
1040                 /* We must stop the poll after a valid target found */
1041                 if (rc == 0)
1042                         goto stop_poll;
1043
1044                 if (rc != -EAGAIN)
1045                         nfc_dev_err(&dev->interface->dev, "The target found is"
1046                                         " not valid - continuing to poll");
1047         }
1048
1049         dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1050
1051         next_mod = dev->poll_mod_active[dev->poll_mod_curr];
1052
1053         nfc_dev_dbg(&dev->interface->dev, "Polling next modulation (0x%x)",
1054                                                         dev->poll_mod_curr);
1055
1056         pn533_start_poll_frame(dev->out_frame, next_mod);
1057
1058         /* Don't need to down the semaphore again */
1059         rc = __pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1060                                 dev->in_maxlen, pn533_start_poll_complete,
1061                                 NULL, GFP_ATOMIC);
1062
1063         if (rc == -EPERM) {
1064                 nfc_dev_dbg(&dev->interface->dev, "Cannot poll next modulation"
1065                                         " because poll has been stopped");
1066                 goto stop_poll;
1067         }
1068
1069         if (rc) {
1070                 nfc_dev_err(&dev->interface->dev, "Error %d when trying to poll"
1071                                                         " next modulation", rc);
1072                 goto stop_poll;
1073         }
1074
1075         /* Inform caller function to do not up the semaphore */
1076         return -EINPROGRESS;
1077
1078 stop_poll:
1079         pn533_poll_reset_mod_list(dev);
1080         dev->poll_protocols = 0;
1081         return 0;
1082 }
1083
1084 static int pn533_start_poll(struct nfc_dev *nfc_dev, u32 protocols)
1085 {
1086         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1087         struct pn533_poll_modulations *start_mod;
1088         int rc;
1089
1090         nfc_dev_dbg(&dev->interface->dev, "%s - protocols=0x%x", __func__,
1091                                                                 protocols);
1092
1093         if (dev->poll_mod_count) {
1094                 nfc_dev_err(&dev->interface->dev, "Polling operation already"
1095                                                                 " active");
1096                 return -EBUSY;
1097         }
1098
1099         if (dev->tgt_active_prot) {
1100                 nfc_dev_err(&dev->interface->dev, "Cannot poll with a target"
1101                                                         " already activated");
1102                 return -EBUSY;
1103         }
1104
1105         pn533_poll_create_mod_list(dev, protocols);
1106
1107         if (!dev->poll_mod_count) {
1108                 nfc_dev_err(&dev->interface->dev, "No valid protocols"
1109                                                                 " specified");
1110                 rc = -EINVAL;
1111                 goto error;
1112         }
1113
1114         nfc_dev_dbg(&dev->interface->dev, "It will poll %d modulations types",
1115                                                         dev->poll_mod_count);
1116
1117         dev->poll_mod_curr = 0;
1118         start_mod = dev->poll_mod_active[dev->poll_mod_curr];
1119
1120         pn533_start_poll_frame(dev->out_frame, start_mod);
1121
1122         rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1123                                 dev->in_maxlen, pn533_start_poll_complete,
1124                                 NULL, GFP_KERNEL);
1125
1126         if (rc) {
1127                 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1128                                                         " start poll", rc);
1129                 goto error;
1130         }
1131
1132         dev->poll_protocols = protocols;
1133
1134         return 0;
1135
1136 error:
1137         pn533_poll_reset_mod_list(dev);
1138         return rc;
1139 }
1140
1141 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1142 {
1143         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1144
1145         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1146
1147         if (!dev->poll_mod_count) {
1148                 nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
1149                                                                 " running");
1150                 return;
1151         }
1152
1153         /* An ack will cancel the last issued command (poll) */
1154         pn533_send_ack(dev, GFP_KERNEL);
1155
1156         /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1157         usb_kill_urb(dev->in_urb);
1158 }
1159
1160 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1161 {
1162         struct pn533_cmd_activate_param param;
1163         struct pn533_cmd_activate_response *resp;
1164         u16 gt_len;
1165         int rc;
1166
1167         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1168
1169         pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
1170
1171         param.tg = 1;
1172         param.next = 0;
1173         memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &param,
1174                                 sizeof(struct pn533_cmd_activate_param));
1175         dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
1176
1177         pn533_tx_frame_finish(dev->out_frame);
1178
1179         rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1180                                                                 dev->in_maxlen);
1181         if (rc)
1182                 return rc;
1183
1184         resp = (struct pn533_cmd_activate_response *)
1185                                 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1186         rc = resp->status & PN533_CMD_RET_MASK;
1187         if (rc != PN533_CMD_RET_SUCCESS)
1188                 return -EIO;
1189
1190         /* ATR_RES general bytes are located at offset 16 */
1191         gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
1192         rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
1193
1194         return rc;
1195 }
1196
1197 static int pn533_activate_target(struct nfc_dev *nfc_dev, u32 target_idx,
1198                                                                 u32 protocol)
1199 {
1200         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1201         int rc;
1202
1203         nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1204                                                                 protocol);
1205
1206         if (dev->poll_mod_count) {
1207                 nfc_dev_err(&dev->interface->dev, "Cannot activate while"
1208                                                                 " polling");
1209                 return -EBUSY;
1210         }
1211
1212         if (dev->tgt_active_prot) {
1213                 nfc_dev_err(&dev->interface->dev, "There is already an active"
1214                                                                 " target");
1215                 return -EBUSY;
1216         }
1217
1218         if (!dev->tgt_available_prots) {
1219                 nfc_dev_err(&dev->interface->dev, "There is no available target"
1220                                                                 " to activate");
1221                 return -EINVAL;
1222         }
1223
1224         if (!(dev->tgt_available_prots & (1 << protocol))) {
1225                 nfc_dev_err(&dev->interface->dev, "The target does not support"
1226                                         " the requested protocol %u", protocol);
1227                 return -EINVAL;
1228         }
1229
1230         if (protocol == NFC_PROTO_NFC_DEP) {
1231                 rc = pn533_activate_target_nfcdep(dev);
1232                 if (rc) {
1233                         nfc_dev_err(&dev->interface->dev, "Error %d when"
1234                                                 " activating target with"
1235                                                 " NFC_DEP protocol", rc);
1236                         return rc;
1237                 }
1238         }
1239
1240         dev->tgt_active_prot = protocol;
1241         dev->tgt_available_prots = 0;
1242
1243         return 0;
1244 }
1245
1246 static void pn533_deactivate_target(struct nfc_dev *nfc_dev, u32 target_idx)
1247 {
1248         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1249         u8 tg;
1250         u8 status;
1251         int rc;
1252
1253         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1254
1255         if (!dev->tgt_active_prot) {
1256                 nfc_dev_err(&dev->interface->dev, "There is no active target");
1257                 return;
1258         }
1259
1260         dev->tgt_active_prot = 0;
1261
1262         skb_queue_purge(&dev->resp_q);
1263
1264         pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
1265
1266         tg = 1;
1267         memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
1268         dev->out_frame->datalen += sizeof(u8);
1269
1270         pn533_tx_frame_finish(dev->out_frame);
1271
1272         rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1273                                                                 dev->in_maxlen);
1274         if (rc) {
1275                 nfc_dev_err(&dev->interface->dev, "Error when sending release"
1276                                                 " command to the controller");
1277                 return;
1278         }
1279
1280         status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
1281         rc = status & PN533_CMD_RET_MASK;
1282         if (rc != PN533_CMD_RET_SUCCESS)
1283                 nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
1284                                                         " the target", rc);
1285
1286         return;
1287 }
1288
1289
1290 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1291                                                 u8 *params, int params_len)
1292 {
1293         struct pn533_cmd_jump_dep *cmd;
1294         struct pn533_cmd_jump_dep_response *resp;
1295         struct nfc_target nfc_target;
1296         u8 target_gt_len;
1297         int rc;
1298
1299         if (params_len == -ENOENT) {
1300                 nfc_dev_dbg(&dev->interface->dev, "");
1301                 return 0;
1302         }
1303
1304         if (params_len < 0) {
1305                 nfc_dev_err(&dev->interface->dev,
1306                                 "Error %d when bringing DEP link up",
1307                                                                 params_len);
1308                 return 0;
1309         }
1310
1311         if (dev->tgt_available_prots &&
1312             !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1313                 nfc_dev_err(&dev->interface->dev,
1314                         "The target does not support DEP");
1315                 return -EINVAL;
1316         }
1317
1318         resp = (struct pn533_cmd_jump_dep_response *) params;
1319         cmd = (struct pn533_cmd_jump_dep *) arg;
1320         rc = resp->status & PN533_CMD_RET_MASK;
1321         if (rc != PN533_CMD_RET_SUCCESS) {
1322                 nfc_dev_err(&dev->interface->dev,
1323                                 "Bringing DEP link up failed %d", rc);
1324                 return 0;
1325         }
1326
1327         if (!dev->tgt_available_prots) {
1328                 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1329
1330                 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1331                 nfc_target.nfcid1_len = 10;
1332                 memcpy(nfc_target.nfcid1, resp->nfcid3t, nfc_target.nfcid1_len);
1333                 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1334                 if (rc)
1335                         return 0;
1336
1337                 dev->tgt_available_prots = 0;
1338         }
1339
1340         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1341
1342         /* ATR_RES general bytes are located at offset 17 */
1343         target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17;
1344         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1345                                                 resp->gt, target_gt_len);
1346         if (rc == 0)
1347                 rc = nfc_dep_link_is_up(dev->nfc_dev,
1348                                                 dev->nfc_dev->targets[0].idx,
1349                                                 !cmd->active, NFC_RF_INITIATOR);
1350
1351         return 0;
1352 }
1353
1354 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, int target_idx,
1355                              u8 comm_mode, u8* gb, size_t gb_len)
1356 {
1357         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1358         struct pn533_cmd_jump_dep *cmd;
1359         u8 cmd_len;
1360         int rc;
1361
1362         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1363
1364         if (dev->poll_mod_count) {
1365                 nfc_dev_err(&dev->interface->dev,
1366                                 "Cannot bring the DEP link up while polling");
1367                 return -EBUSY;
1368         }
1369
1370         if (dev->tgt_active_prot) {
1371                 nfc_dev_err(&dev->interface->dev,
1372                                 "There is already an active target");
1373                 return -EBUSY;
1374         }
1375
1376         cmd_len = sizeof(struct pn533_cmd_jump_dep) + gb_len;
1377         cmd = kzalloc(cmd_len, GFP_KERNEL);
1378         if (cmd == NULL)
1379                 return -ENOMEM;
1380
1381         pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
1382
1383         cmd->active = !comm_mode;
1384         cmd->baud = 0;
1385         if (gb != NULL && gb_len > 0) {
1386                 cmd->next = 4; /* We have some Gi */
1387                 memcpy(cmd->gt, gb, gb_len);
1388         } else {
1389                 cmd->next = 0;
1390         }
1391
1392         memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len);
1393         dev->out_frame->datalen += cmd_len;
1394
1395         pn533_tx_frame_finish(dev->out_frame);
1396
1397         rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1398                                 dev->in_maxlen, pn533_in_dep_link_up_complete,
1399                                 cmd, GFP_KERNEL);
1400         if (rc)
1401                 goto out;
1402
1403
1404 out:
1405         kfree(cmd);
1406
1407         return rc;
1408 }
1409
1410 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1411 {
1412         pn533_deactivate_target(nfc_dev, 0);
1413
1414         return 0;
1415 }
1416
1417 #define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3)
1418 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1419
1420 static int pn533_data_exchange_tx_frame(struct pn533 *dev, struct sk_buff *skb)
1421 {
1422         int payload_len = skb->len;
1423         struct pn533_frame *out_frame;
1424         u8 tg;
1425
1426         nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__,
1427                                                                 payload_len);
1428
1429         if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
1430                 /* TODO: Implement support to multi-part data exchange */
1431                 nfc_dev_err(&dev->interface->dev, "Data length greater than the"
1432                                                 " max allowed: %d",
1433                                                 PN533_CMD_DATAEXCH_DATA_MAXLEN);
1434                 return -ENOSYS;
1435         }
1436
1437         skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN);
1438         out_frame = (struct pn533_frame *) skb->data;
1439
1440         pn533_tx_frame_init(out_frame, PN533_CMD_IN_DATA_EXCHANGE);
1441
1442         tg = 1;
1443         memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame), &tg, sizeof(u8));
1444         out_frame->datalen += sizeof(u8);
1445
1446         /* The data is already in the out_frame, just update the datalen */
1447         out_frame->datalen += payload_len;
1448
1449         pn533_tx_frame_finish(out_frame);
1450         skb_put(skb, PN533_FRAME_TAIL_SIZE);
1451
1452         return 0;
1453 }
1454
1455 struct pn533_data_exchange_arg {
1456         struct sk_buff *skb_resp;
1457         struct sk_buff *skb_out;
1458         data_exchange_cb_t cb;
1459         void *cb_context;
1460 };
1461
1462 static struct sk_buff *pn533_build_response(struct pn533 *dev)
1463 {
1464         struct sk_buff *skb, *tmp, *t;
1465         unsigned int skb_len = 0, tmp_len = 0;
1466
1467         nfc_dev_dbg(&dev->interface->dev, "%s\n", __func__);
1468
1469         if (skb_queue_empty(&dev->resp_q))
1470                 return NULL;
1471
1472         if (skb_queue_len(&dev->resp_q) == 1) {
1473                 skb = skb_dequeue(&dev->resp_q);
1474                 goto out;
1475         }
1476
1477         skb_queue_walk_safe(&dev->resp_q, tmp, t)
1478                 skb_len += tmp->len;
1479
1480         nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
1481                     __func__, skb_len);
1482
1483         skb = alloc_skb(skb_len, GFP_KERNEL);
1484         if (skb == NULL)
1485                 goto out;
1486
1487         skb_put(skb, skb_len);
1488
1489         skb_queue_walk_safe(&dev->resp_q, tmp, t) {
1490                 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
1491                 tmp_len += tmp->len;
1492         }
1493
1494 out:
1495         skb_queue_purge(&dev->resp_q);
1496
1497         return skb;
1498 }
1499
1500 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
1501                                                 u8 *params, int params_len)
1502 {
1503         struct pn533_data_exchange_arg *arg = _arg;
1504         struct sk_buff *skb = NULL, *skb_resp = arg->skb_resp;
1505         struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
1506         int err = 0;
1507         u8 status;
1508         u8 cmd_ret;
1509
1510         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1511
1512         dev_kfree_skb(arg->skb_out);
1513
1514         if (params_len < 0) { /* error */
1515                 err = params_len;
1516                 goto error;
1517         }
1518
1519         status = params[0];
1520
1521         cmd_ret = status & PN533_CMD_RET_MASK;
1522         if (cmd_ret != PN533_CMD_RET_SUCCESS) {
1523                 nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when"
1524                                                 " exchanging data", cmd_ret);
1525                 err = -EIO;
1526                 goto error;
1527         }
1528
1529         skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
1530         skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
1531         skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
1532         skb_queue_tail(&dev->resp_q, skb_resp);
1533
1534         if (status & PN533_CMD_MI_MASK) {
1535                 queue_work(dev->wq, &dev->mi_work);
1536                 return -EINPROGRESS;
1537         }
1538
1539         skb = pn533_build_response(dev);
1540         if (skb == NULL)
1541                 goto error;
1542
1543         arg->cb(arg->cb_context, skb, 0);
1544         kfree(arg);
1545         return 0;
1546
1547 error:
1548         skb_queue_purge(&dev->resp_q);
1549         dev_kfree_skb(skb_resp);
1550         arg->cb(arg->cb_context, NULL, err);
1551         kfree(arg);
1552         return 0;
1553 }
1554
1555 static int pn533_data_exchange(struct nfc_dev *nfc_dev, u32 target_idx,
1556                                                 struct sk_buff *skb,
1557                                                 data_exchange_cb_t cb,
1558                                                 void *cb_context)
1559 {
1560         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1561         struct pn533_frame *out_frame, *in_frame;
1562         struct pn533_data_exchange_arg *arg;
1563         struct sk_buff *skb_resp;
1564         int skb_resp_len;
1565         int rc;
1566
1567         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1568
1569         if (!dev->tgt_active_prot) {
1570                 nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
1571                                                 " there is no active target");
1572                 rc = -EINVAL;
1573                 goto error;
1574         }
1575
1576         rc = pn533_data_exchange_tx_frame(dev, skb);
1577         if (rc)
1578                 goto error;
1579
1580         skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1581                         PN533_CMD_DATAEXCH_DATA_MAXLEN +
1582                         PN533_FRAME_TAIL_SIZE;
1583
1584         skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
1585         if (!skb_resp) {
1586                 rc = -ENOMEM;
1587                 goto error;
1588         }
1589
1590         in_frame = (struct pn533_frame *) skb_resp->data;
1591         out_frame = (struct pn533_frame *) skb->data;
1592
1593         arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL);
1594         if (!arg) {
1595                 rc = -ENOMEM;
1596                 goto free_skb_resp;
1597         }
1598
1599         arg->skb_resp = skb_resp;
1600         arg->skb_out = skb;
1601         arg->cb = cb;
1602         arg->cb_context = cb_context;
1603
1604         rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len,
1605                                         pn533_data_exchange_complete, arg,
1606                                         GFP_KERNEL);
1607         if (rc) {
1608                 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1609                                                 " perform data_exchange", rc);
1610                 goto free_arg;
1611         }
1612
1613         return 0;
1614
1615 free_arg:
1616         kfree(arg);
1617 free_skb_resp:
1618         kfree_skb(skb_resp);
1619 error:
1620         kfree_skb(skb);
1621         return rc;
1622 }
1623
1624 static void pn533_wq_mi_recv(struct work_struct *work)
1625 {
1626         struct pn533 *dev = container_of(work, struct pn533, mi_work);
1627         struct sk_buff *skb_cmd;
1628         struct pn533_data_exchange_arg *arg = dev->cmd_complete_arg;
1629         struct pn533_frame *out_frame, *in_frame;
1630         struct sk_buff *skb_resp;
1631         int skb_resp_len;
1632         int rc;
1633
1634         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1635
1636         /* This is a zero payload size skb */
1637         skb_cmd = alloc_skb(PN533_CMD_DATAEXCH_HEAD_LEN + PN533_FRAME_TAIL_SIZE,
1638                             GFP_KERNEL);
1639         if (skb_cmd == NULL)
1640                 goto error_cmd;
1641
1642         skb_reserve(skb_cmd, PN533_CMD_DATAEXCH_HEAD_LEN);
1643
1644         rc = pn533_data_exchange_tx_frame(dev, skb_cmd);
1645         if (rc)
1646                 goto error_frame;
1647
1648         skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1649                         PN533_CMD_DATAEXCH_DATA_MAXLEN +
1650                         PN533_FRAME_TAIL_SIZE;
1651         skb_resp = alloc_skb(skb_resp_len, GFP_KERNEL);
1652         if (!skb_resp) {
1653                 rc = -ENOMEM;
1654                 goto error_frame;
1655         }
1656
1657         in_frame = (struct pn533_frame *) skb_resp->data;
1658         out_frame = (struct pn533_frame *) skb_cmd->data;
1659
1660         arg->skb_resp = skb_resp;
1661         arg->skb_out = skb_cmd;
1662
1663         rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
1664                                           skb_resp_len,
1665                                           pn533_data_exchange_complete,
1666                                           dev->cmd_complete_arg, GFP_KERNEL);
1667         if (!rc)
1668                 return;
1669
1670         nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1671                                                 " perform data_exchange", rc);
1672
1673         kfree_skb(skb_resp);
1674
1675 error_frame:
1676         kfree_skb(skb_cmd);
1677
1678 error_cmd:
1679         pn533_send_ack(dev, GFP_KERNEL);
1680
1681         kfree(arg);
1682
1683         up(&dev->cmd_lock);
1684 }
1685
1686 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
1687                                                                 u8 cfgdata_len)
1688 {
1689         int rc;
1690         u8 *params;
1691
1692         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1693
1694         pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
1695
1696         params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
1697         params[0] = cfgitem;
1698         memcpy(&params[1], cfgdata, cfgdata_len);
1699         dev->out_frame->datalen += (1 + cfgdata_len);
1700
1701         pn533_tx_frame_finish(dev->out_frame);
1702
1703         rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1704                                                                 dev->in_maxlen);
1705
1706         return rc;
1707 }
1708
1709 struct nfc_ops pn533_nfc_ops = {
1710         .dev_up = NULL,
1711         .dev_down = NULL,
1712         .dep_link_up = pn533_dep_link_up,
1713         .dep_link_down = pn533_dep_link_down,
1714         .start_poll = pn533_start_poll,
1715         .stop_poll = pn533_stop_poll,
1716         .activate_target = pn533_activate_target,
1717         .deactivate_target = pn533_deactivate_target,
1718         .data_exchange = pn533_data_exchange,
1719 };
1720
1721 static int pn533_probe(struct usb_interface *interface,
1722                         const struct usb_device_id *id)
1723 {
1724         struct pn533_fw_version *fw_ver;
1725         struct pn533 *dev;
1726         struct usb_host_interface *iface_desc;
1727         struct usb_endpoint_descriptor *endpoint;
1728         struct pn533_config_max_retries max_retries;
1729         int in_endpoint = 0;
1730         int out_endpoint = 0;
1731         int rc = -ENOMEM;
1732         int i;
1733         u32 protocols;
1734
1735         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1736         if (!dev)
1737                 return -ENOMEM;
1738
1739         dev->udev = usb_get_dev(interface_to_usbdev(interface));
1740         dev->interface = interface;
1741         sema_init(&dev->cmd_lock, 1);
1742
1743         iface_desc = interface->cur_altsetting;
1744         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1745                 endpoint = &iface_desc->endpoint[i].desc;
1746
1747                 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1748                         dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize);
1749                         in_endpoint = endpoint->bEndpointAddress;
1750                 }
1751
1752                 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) {
1753                         dev->out_maxlen =
1754                                 le16_to_cpu(endpoint->wMaxPacketSize);
1755                         out_endpoint = endpoint->bEndpointAddress;
1756                 }
1757         }
1758
1759         if (!in_endpoint || !out_endpoint) {
1760                 nfc_dev_err(&interface->dev, "Could not find bulk-in or"
1761                                                         " bulk-out endpoint");
1762                 rc = -ENODEV;
1763                 goto error;
1764         }
1765
1766         dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
1767         dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1768         dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
1769         dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1770
1771         if (!dev->in_frame || !dev->out_frame ||
1772                 !dev->in_urb || !dev->out_urb)
1773                 goto error;
1774
1775         usb_fill_bulk_urb(dev->in_urb, dev->udev,
1776                         usb_rcvbulkpipe(dev->udev, in_endpoint),
1777                         NULL, 0, NULL, dev);
1778         usb_fill_bulk_urb(dev->out_urb, dev->udev,
1779                         usb_sndbulkpipe(dev->udev, out_endpoint),
1780                         NULL, 0,
1781                         pn533_send_complete, dev);
1782
1783         INIT_WORK(&dev->cmd_work, pn533_wq_cmd_complete);
1784         INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
1785         dev->wq = alloc_workqueue("pn533",
1786                                   WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
1787                                   1);
1788         if (dev->wq == NULL)
1789                 goto error;
1790
1791         skb_queue_head_init(&dev->resp_q);
1792
1793         usb_set_intfdata(interface, dev);
1794
1795         pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
1796         pn533_tx_frame_finish(dev->out_frame);
1797
1798         rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1799                                                                 dev->in_maxlen);
1800         if (rc)
1801                 goto destroy_wq;
1802
1803         fw_ver = (struct pn533_fw_version *)
1804                                 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1805         nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
1806                                         " attached", fw_ver->ver, fw_ver->rev);
1807
1808         protocols = NFC_PROTO_JEWEL_MASK
1809                         | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
1810                         | NFC_PROTO_ISO14443_MASK
1811                         | NFC_PROTO_NFC_DEP_MASK;
1812
1813         dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
1814                                            PN533_CMD_DATAEXCH_HEAD_LEN,
1815                                            PN533_FRAME_TAIL_SIZE);
1816         if (!dev->nfc_dev)
1817                 goto destroy_wq;
1818
1819         nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
1820         nfc_set_drvdata(dev->nfc_dev, dev);
1821
1822         rc = nfc_register_device(dev->nfc_dev);
1823         if (rc)
1824                 goto free_nfc_dev;
1825
1826         max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
1827         max_retries.mx_rty_psl = 2;
1828         max_retries.mx_rty_passive_act = PN533_CONFIG_MAX_RETRIES_NO_RETRY;
1829
1830         rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
1831                                 (u8 *) &max_retries, sizeof(max_retries));
1832
1833         if (rc) {
1834                 nfc_dev_err(&dev->interface->dev, "Error on setting MAX_RETRIES"
1835                                                                 " config");
1836                 goto free_nfc_dev;
1837         }
1838
1839         return 0;
1840
1841 free_nfc_dev:
1842         nfc_free_device(dev->nfc_dev);
1843 destroy_wq:
1844         destroy_workqueue(dev->wq);
1845 error:
1846         kfree(dev->in_frame);
1847         usb_free_urb(dev->in_urb);
1848         kfree(dev->out_frame);
1849         usb_free_urb(dev->out_urb);
1850         kfree(dev);
1851         return rc;
1852 }
1853
1854 static void pn533_disconnect(struct usb_interface *interface)
1855 {
1856         struct pn533 *dev;
1857
1858         dev = usb_get_intfdata(interface);
1859         usb_set_intfdata(interface, NULL);
1860
1861         nfc_unregister_device(dev->nfc_dev);
1862         nfc_free_device(dev->nfc_dev);
1863
1864         usb_kill_urb(dev->in_urb);
1865         usb_kill_urb(dev->out_urb);
1866
1867         destroy_workqueue(dev->wq);
1868
1869         skb_queue_purge(&dev->resp_q);
1870
1871         kfree(dev->in_frame);
1872         usb_free_urb(dev->in_urb);
1873         kfree(dev->out_frame);
1874         usb_free_urb(dev->out_urb);
1875         kfree(dev);
1876
1877         nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
1878 }
1879
1880 static struct usb_driver pn533_driver = {
1881         .name =         "pn533",
1882         .probe =        pn533_probe,
1883         .disconnect =   pn533_disconnect,
1884         .id_table =     pn533_table,
1885 };
1886
1887 module_usb_driver(pn533_driver);
1888
1889 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
1890                         " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
1891 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
1892 MODULE_VERSION(VERSION);
1893 MODULE_LICENSE("GPL");