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         in_frame = dev->wq_in_frame;
 398
 399         if (dev->wq_in_error)
 400                 rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
 401                                                         dev->wq_in_error);
 402         else
 403                 rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
 404                                         PN533_FRAME_CMD_PARAMS_PTR(in_frame),
 405                                         PN533_FRAME_CMD_PARAMS_LEN(in_frame));
 406
 407         if (rc != -EINPROGRESS)
 408                 up(&dev->cmd_lock);
 409 }
 410
 411 static void pn533_recv_response(struct urb *urb)
 412 {
 413         struct pn533 *dev = urb->context;
 414         struct pn533_frame *in_frame;
 415
 416         dev->wq_in_frame = NULL;
 417
 418         switch (urb->status) {
 419         case 0:
 420                 /* success */
 421                 break;
 422         case -ECONNRESET:
 423         case -ENOENT:
 424         case -ESHUTDOWN:
 425                 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
 426                                                 " status: %d", urb->status);
 427                 dev->wq_in_error = urb->status;
 428                 goto sched_wq;
 429         default:
 430                 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
 431                                                         " %d", urb->status);
 432                 dev->wq_in_error = urb->status;
 433                 goto sched_wq;
 434         }
 435
 436         in_frame = dev->in_urb->transfer_buffer;
 437
 438         if (!pn533_rx_frame_is_valid(in_frame)) {
 439                 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
 440                 dev->wq_in_error = -EIO;
 441                 goto sched_wq;
 442         }
 443
 444         if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
 445                 nfc_dev_err(&dev->interface->dev, "The received frame is not "
 446                                                 "response to the last command");
 447                 dev->wq_in_error = -EIO;
 448                 goto sched_wq;
 449         }
 450
 451         nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
 452         dev->wq_in_error = 0;
 453         dev->wq_in_frame = in_frame;
 454
 455 sched_wq:
 456         queue_work(dev->wq, &dev->cmd_work);
 457 }
 458
 459 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
 460 {
 461         dev->in_urb->complete = pn533_recv_response;
 462
 463         return usb_submit_urb(dev->in_urb, flags);
 464 }
 465
 466 static void pn533_recv_ack(struct urb *urb)
 467 {
 468         struct pn533 *dev = urb->context;
 469         struct pn533_frame *in_frame;
 470         int rc;
 471
 472         switch (urb->status) {
 473         case 0:
 474                 /* success */
 475                 break;
 476         case -ECONNRESET:
 477         case -ENOENT:
 478         case -ESHUTDOWN:
 479                 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
 480                                                 " status: %d", urb->status);
 481                 dev->wq_in_error = urb->status;
 482                 goto sched_wq;
 483         default:
 484                 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
 485                                                         " %d", urb->status);
 486                 dev->wq_in_error = urb->status;
 487                 goto sched_wq;
 488         }
 489
 490         in_frame = dev->in_urb->transfer_buffer;
 491
 492         if (!pn533_rx_frame_is_ack(in_frame)) {
 493                 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
 494                 dev->wq_in_error = -EIO;
 495                 goto sched_wq;
 496         }
 497
 498         nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
 499
 500         rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
 501         if (rc) {
 502                 nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with"
 503                                                         " result %d", rc);
 504                 dev->wq_in_error = rc;
 505                 goto sched_wq;
 506         }
 507
 508         return;
 509
 510 sched_wq:
 511         dev->wq_in_frame = NULL;
 512         queue_work(dev->wq, &dev->cmd_work);
 513 }
 514
 515 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
 516 {
 517         dev->in_urb->complete = pn533_recv_ack;
 518
 519         return usb_submit_urb(dev->in_urb, flags);
 520 }
 521
 522 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
 523 {
 524         int rc;
 525
 526         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 527
 528         pn533_tx_frame_ack(dev->out_frame);
 529
 530         dev->out_urb->transfer_buffer = dev->out_frame;
 531         dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
 532         rc = usb_submit_urb(dev->out_urb, flags);
 533
 534         return rc;
 535 }
 536
 537 static int __pn533_send_cmd_frame_async(struct pn533 *dev,
 538                                         struct pn533_frame *out_frame,
 539                                         struct pn533_frame *in_frame,
 540                                         int in_frame_len,
 541                                         pn533_cmd_complete_t cmd_complete,
 542                                         void *arg, gfp_t flags)
 543 {
 544         int rc;
 545
 546         nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
 547                                                 PN533_FRAME_CMD(out_frame));
 548
 549         dev->cmd = PN533_FRAME_CMD(out_frame);
 550         dev->cmd_complete = cmd_complete;
 551         dev->cmd_complete_arg = arg;
 552
 553         dev->out_urb->transfer_buffer = out_frame;
 554         dev->out_urb->transfer_buffer_length =
 555                                 PN533_FRAME_SIZE(out_frame);
 556
 557         dev->in_urb->transfer_buffer = in_frame;
 558         dev->in_urb->transfer_buffer_length = in_frame_len;
 559
 560         rc = usb_submit_urb(dev->out_urb, flags);
 561         if (rc)
 562                 return rc;
 563
 564         rc = pn533_submit_urb_for_ack(dev, flags);
 565         if (rc)
 566                 goto error;
 567
 568         return 0;
 569
 570 error:
 571         usb_unlink_urb(dev->out_urb);
 572         return rc;
 573 }
 574
 575 static int pn533_send_cmd_frame_async(struct pn533 *dev,
 576                                         struct pn533_frame *out_frame,
 577                                         struct pn533_frame *in_frame,
 578                                         int in_frame_len,
 579                                         pn533_cmd_complete_t cmd_complete,
 580                                         void *arg, gfp_t flags)
 581 {
 582         int rc;
 583
 584         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 585
 586         if (down_trylock(&dev->cmd_lock))
 587                 return -EBUSY;
 588
 589         rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
 590                                         in_frame_len, cmd_complete, arg, flags);
 591         if (rc)
 592                 goto error;
 593
 594         return 0;
 595 error:
 596         up(&dev->cmd_lock);
 597         return rc;
 598 }
 599
 600 struct pn533_sync_cmd_response {
 601         int rc;
 602         struct completion done;
 603 };
 604
 605 static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg,
 606                                         u8 *params, int params_len)
 607 {
 608         struct pn533_sync_cmd_response *arg = _arg;
 609
 610         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 611
 612         arg->rc = 0;
 613
 614         if (params_len < 0) /* error */
 615                 arg->rc = params_len;
 616
 617         complete(&arg->done);
 618
 619         return 0;
 620 }
 621
 622 static int pn533_send_cmd_frame_sync(struct pn533 *dev,
 623                                                 struct pn533_frame *out_frame,
 624                                                 struct pn533_frame *in_frame,
 625                                                 int in_frame_len)
 626 {
 627         int rc;
 628         struct pn533_sync_cmd_response arg;
 629
 630         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 631
 632         init_completion(&arg.done);
 633
 634         rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len,
 635                                 pn533_sync_cmd_complete, &arg, GFP_KERNEL);
 636         if (rc)
 637                 return rc;
 638
 639         wait_for_completion(&arg.done);
 640
 641         return arg.rc;
 642 }
 643
 644 static void pn533_send_complete(struct urb *urb)
 645 {
 646         struct pn533 *dev = urb->context;
 647
 648         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 649
 650         switch (urb->status) {
 651         case 0:
 652                 /* success */
 653                 break;
 654         case -ECONNRESET:
 655         case -ENOENT:
 656         case -ESHUTDOWN:
 657                 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
 658                                                 " status: %d", urb->status);
 659                 break;
 660         default:
 661                 nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:"
 662                                                         " %d", urb->status);
 663         }
 664 }
 665
 666 struct pn533_target_type_a {
 667         __be16 sens_res;
 668         u8 sel_res;
 669         u8 nfcid_len;
 670         u8 nfcid_data[];
 671 } __packed;
 672
 673
 674 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
 675 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
 676 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
 677
 678 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
 679 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
 680
 681 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
 682 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
 683
 684 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
 685 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
 686 #define PN533_TYPE_A_SEL_PROT_DEP 2
 687 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
 688
 689 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
 690                                                         int target_data_len)
 691 {
 692         u8 ssd;
 693         u8 platconf;
 694
 695         if (target_data_len < sizeof(struct pn533_target_type_a))
 696                 return false;
 697
 698         /* The lenght check of nfcid[] and ats[] are not being performed because
 699            the values are not being used */
 700
 701         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
 702         ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
 703         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
 704
 705         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 706                         platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
 707                         (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 708                         platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
 709                 return false;
 710
 711         /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
 712         if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
 713                 return false;
 714
 715         return true;
 716 }
 717
 718 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
 719                                                         int tgt_data_len)
 720 {
 721         struct pn533_target_type_a *tgt_type_a;
 722
 723         tgt_type_a = (struct pn533_target_type_a *) tgt_data;
 724
 725         if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
 726                 return -EPROTO;
 727
 728         switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
 729         case PN533_TYPE_A_SEL_PROT_MIFARE:
 730                 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
 731                 break;
 732         case PN533_TYPE_A_SEL_PROT_ISO14443:
 733                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
 734                 break;
 735         case PN533_TYPE_A_SEL_PROT_DEP:
 736                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
 737                 break;
 738         case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
 739                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
 740                                                         NFC_PROTO_NFC_DEP_MASK;
 741                 break;
 742         }
 743
 744         nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
 745         nfc_tgt->sel_res = tgt_type_a->sel_res;
 746         nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
 747         memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
 748
 749         return 0;
 750 }
 751
 752 struct pn533_target_felica {
 753         u8 pol_res;
 754         u8 opcode;
 755         u8 nfcid2[8];
 756         u8 pad[8];
 757         /* optional */
 758         u8 syst_code[];
 759 } __packed;
 760
 761 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
 762 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
 763
 764 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
 765                                                         int target_data_len)
 766 {
 767         if (target_data_len < sizeof(struct pn533_target_felica))
 768                 return false;
 769
 770         if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
 771                 return false;
 772
 773         return true;
 774 }
 775
 776 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
 777                                                         int tgt_data_len)
 778 {
 779         struct pn533_target_felica *tgt_felica;
 780
 781         tgt_felica = (struct pn533_target_felica *) tgt_data;
 782
 783         if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
 784                 return -EPROTO;
 785
 786         if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 &&
 787                                         tgt_felica->nfcid2[1] ==
 788                                         PN533_FELICA_SENSF_NFCID2_DEP_B2)
 789                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
 790         else
 791                 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
 792
 793         memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
 794         nfc_tgt->sensf_res_len = 9;
 795
 796         return 0;
 797 }
 798
 799 struct pn533_target_jewel {
 800         __be16 sens_res;
 801         u8 jewelid[4];
 802 } __packed;
 803
 804 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
 805                                                         int target_data_len)
 806 {
 807         u8 ssd;
 808         u8 platconf;
 809
 810         if (target_data_len < sizeof(struct pn533_target_jewel))
 811                 return false;
 812
 813         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
 814         ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
 815         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
 816
 817         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 818                         platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
 819                         (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 820                         platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
 821                 return false;
 822
 823         return true;
 824 }
 825
 826 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
 827                                                         int tgt_data_len)
 828 {
 829         struct pn533_target_jewel *tgt_jewel;
 830
 831         tgt_jewel = (struct pn533_target_jewel *) tgt_data;
 832
 833         if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
 834                 return -EPROTO;
 835
 836         nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
 837         nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
 838         nfc_tgt->nfcid1_len = 4;
 839         memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
 840
 841         return 0;
 842 }
 843
 844 struct pn533_type_b_prot_info {
 845         u8 bitrate;
 846         u8 fsci_type;
 847         u8 fwi_adc_fo;
 848 } __packed;
 849
 850 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
 851 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
 852 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
 853
 854 struct pn533_type_b_sens_res {
 855         u8 opcode;
 856         u8 nfcid[4];
 857         u8 appdata[4];
 858         struct pn533_type_b_prot_info prot_info;
 859 } __packed;
 860
 861 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
 862
 863 struct pn533_target_type_b {
 864         struct pn533_type_b_sens_res sensb_res;
 865         u8 attrib_res_len;
 866         u8 attrib_res[];
 867 } __packed;
 868
 869 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
 870                                                         int target_data_len)
 871 {
 872         if (target_data_len < sizeof(struct pn533_target_type_b))
 873                 return false;
 874
 875         if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
 876                 return false;
 877
 878         if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
 879                                                 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
 880                 return false;
 881
 882         return true;
 883 }
 884
 885 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
 886                                                         int tgt_data_len)
 887 {
 888         struct pn533_target_type_b *tgt_type_b;
 889
 890         tgt_type_b = (struct pn533_target_type_b *) tgt_data;
 891
 892         if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
 893                 return -EPROTO;
 894
 895         nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
 896
 897         return 0;
 898 }
 899
 900 struct pn533_poll_response {
 901         u8 nbtg;
 902         u8 tg;
 903         u8 target_data[];
 904 } __packed;
 905
 906 static int pn533_target_found(struct pn533 *dev,
 907                         struct pn533_poll_response *resp, int resp_len)
 908 {
 909         int target_data_len;
 910         struct nfc_target nfc_tgt;
 911         int rc;
 912
 913         nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
 914                                                         dev->poll_mod_curr);
 915
 916         if (resp->tg != 1)
 917                 return -EPROTO;
 918
 919         memset(&nfc_tgt, 0, sizeof(struct nfc_target));
 920
 921         target_data_len = resp_len - sizeof(struct pn533_poll_response);
 922
 923         switch (dev->poll_mod_curr) {
 924         case PN533_POLL_MOD_106KBPS_A:
 925                 rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
 926                                                         target_data_len);
 927                 break;
 928         case PN533_POLL_MOD_212KBPS_FELICA:
 929         case PN533_POLL_MOD_424KBPS_FELICA:
 930                 rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
 931                                                         target_data_len);
 932                 break;
 933         case PN533_POLL_MOD_106KBPS_JEWEL:
 934                 rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
 935                                                         target_data_len);
 936                 break;
 937         case PN533_POLL_MOD_847KBPS_B:
 938                 rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
 939                                                         target_data_len);
 940                 break;
 941         default:
 942                 nfc_dev_err(&dev->interface->dev, "Unknown current poll"
 943                                                                 " modulation");
 944                 return -EPROTO;
 945         }
 946
 947         if (rc)
 948                 return rc;
 949
 950         if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
 951                 nfc_dev_dbg(&dev->interface->dev, "The target found does not"
 952                                                 " have the desired protocol");
 953                 return -EAGAIN;
 954         }
 955
 956         nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
 957                                         "0x%x", nfc_tgt.supported_protocols);
 958
 959         dev->tgt_available_prots = nfc_tgt.supported_protocols;
 960
 961         nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
 962
 963         return 0;
 964 }
 965
 966 static void pn533_poll_reset_mod_list(struct pn533 *dev)
 967 {
 968         dev->poll_mod_count = 0;
 969 }
 970
 971 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
 972 {
 973         dev->poll_mod_active[dev->poll_mod_count] =
 974                 (struct pn533_poll_modulations *) &poll_mod[mod_index];
 975         dev->poll_mod_count++;
 976 }
 977
 978 static void pn533_poll_create_mod_list(struct pn533 *dev, u32 protocols)
 979 {
 980         pn533_poll_reset_mod_list(dev);
 981
 982         if (protocols & NFC_PROTO_MIFARE_MASK
 983                                         || protocols & NFC_PROTO_ISO14443_MASK
 984                                         || protocols & NFC_PROTO_NFC_DEP_MASK)
 985                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
 986
 987         if (protocols & NFC_PROTO_FELICA_MASK
 988                                         || protocols & NFC_PROTO_NFC_DEP_MASK) {
 989                 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
 990                 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
 991         }
 992
 993         if (protocols & NFC_PROTO_JEWEL_MASK)
 994                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
 995
 996         if (protocols & NFC_PROTO_ISO14443_MASK)
 997                 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
 998 }
 999
1000 static void pn533_start_poll_frame(struct pn533_frame *frame,
1001                                         struct pn533_poll_modulations *mod)
1002 {
1003
1004         pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
1005
1006         memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
1007         frame->datalen += mod->len;
1008
1009         pn533_tx_frame_finish(frame);
1010 }
1011
1012 static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
1013                                                 u8 *params, int params_len)
1014 {
1015         struct pn533_poll_response *resp;
1016         struct pn533_poll_modulations *next_mod;
1017         int rc;
1018
1019         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1020
1021         if (params_len == -ENOENT) {
1022                 nfc_dev_dbg(&dev->interface->dev, "Polling operation has been"
1023                                                                 " stopped");
1024                 goto stop_poll;
1025         }
1026
1027         if (params_len < 0) {
1028                 nfc_dev_err(&dev->interface->dev, "Error %d when running poll",
1029                                                                 params_len);
1030                 goto stop_poll;
1031         }
1032
1033         resp = (struct pn533_poll_response *) params;
1034         if (resp->nbtg) {
1035                 rc = pn533_target_found(dev, resp, params_len);
1036
1037                 /* We must stop the poll after a valid target found */
1038                 if (rc == 0)
1039                         goto stop_poll;
1040
1041                 if (rc != -EAGAIN)
1042                         nfc_dev_err(&dev->interface->dev, "The target found is"
1043                                         " not valid - continuing to poll");
1044         }
1045
1046         dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1047
1048         next_mod = dev->poll_mod_active[dev->poll_mod_curr];
1049
1050         nfc_dev_dbg(&dev->interface->dev, "Polling next modulation (0x%x)",
1051                                                         dev->poll_mod_curr);
1052
1053         pn533_start_poll_frame(dev->out_frame, next_mod);
1054
1055         /* Don't need to down the semaphore again */
1056         rc = __pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1057                                 dev->in_maxlen, pn533_start_poll_complete,
1058                                 NULL, GFP_ATOMIC);
1059
1060         if (rc == -EPERM) {
1061                 nfc_dev_dbg(&dev->interface->dev, "Cannot poll next modulation"
1062                                         " because poll has been stopped");
1063                 goto stop_poll;
1064         }
1065
1066         if (rc) {
1067                 nfc_dev_err(&dev->interface->dev, "Error %d when trying to poll"
1068                                                         " next modulation", rc);
1069                 goto stop_poll;
1070         }
1071
1072         /* Inform caller function to do not up the semaphore */
1073         return -EINPROGRESS;
1074
1075 stop_poll:
1076         pn533_poll_reset_mod_list(dev);
1077         dev->poll_protocols = 0;
1078         return 0;
1079 }
1080
1081 static int pn533_start_poll(struct nfc_dev *nfc_dev, u32 protocols)
1082 {
1083         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1084         struct pn533_poll_modulations *start_mod;
1085         int rc;
1086
1087         nfc_dev_dbg(&dev->interface->dev, "%s - protocols=0x%x", __func__,
1088                                                                 protocols);
1089
1090         if (dev->poll_mod_count) {
1091                 nfc_dev_err(&dev->interface->dev, "Polling operation already"
1092                                                                 " active");
1093                 return -EBUSY;
1094         }
1095
1096         if (dev->tgt_active_prot) {
1097                 nfc_dev_err(&dev->interface->dev, "Cannot poll with a target"
1098                                                         " already activated");
1099                 return -EBUSY;
1100         }
1101
1102         pn533_poll_create_mod_list(dev, protocols);
1103
1104         if (!dev->poll_mod_count) {
1105                 nfc_dev_err(&dev->interface->dev, "No valid protocols"
1106                                                                 " specified");
1107                 rc = -EINVAL;
1108                 goto error;
1109         }
1110
1111         nfc_dev_dbg(&dev->interface->dev, "It will poll %d modulations types",
1112                                                         dev->poll_mod_count);
1113
1114         dev->poll_mod_curr = 0;
1115         start_mod = dev->poll_mod_active[dev->poll_mod_curr];
1116
1117         pn533_start_poll_frame(dev->out_frame, start_mod);
1118
1119         rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1120                                 dev->in_maxlen, pn533_start_poll_complete,
1121                                 NULL, GFP_KERNEL);
1122
1123         if (rc) {
1124                 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1125                                                         " start poll", rc);
1126                 goto error;
1127         }
1128
1129         dev->poll_protocols = protocols;
1130
1131         return 0;
1132
1133 error:
1134         pn533_poll_reset_mod_list(dev);
1135         return rc;
1136 }
1137
1138 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1139 {
1140         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1141
1142         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1143
1144         if (!dev->poll_mod_count) {
1145                 nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
1146                                                                 " running");
1147                 return;
1148         }
1149
1150         /* An ack will cancel the last issued command (poll) */
1151         pn533_send_ack(dev, GFP_KERNEL);
1152
1153         /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1154         usb_kill_urb(dev->in_urb);
1155 }
1156
1157 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1158 {
1159         struct pn533_cmd_activate_param param;
1160         struct pn533_cmd_activate_response *resp;
1161         u16 gt_len;
1162         int rc;
1163
1164         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1165
1166         pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
1167
1168         param.tg = 1;
1169         param.next = 0;
1170         memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &param,
1171                                 sizeof(struct pn533_cmd_activate_param));
1172         dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
1173
1174         pn533_tx_frame_finish(dev->out_frame);
1175
1176         rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1177                                                                 dev->in_maxlen);
1178         if (rc)
1179                 return rc;
1180
1181         resp = (struct pn533_cmd_activate_response *)
1182                                 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1183         rc = resp->status & PN533_CMD_RET_MASK;
1184         if (rc != PN533_CMD_RET_SUCCESS)
1185                 return -EIO;
1186
1187         /* ATR_RES general bytes are located at offset 16 */
1188         gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
1189         rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
1190
1191         return rc;
1192 }
1193
1194 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1195                                  struct nfc_target *target, u32 protocol)
1196 {
1197         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1198         int rc;
1199
1200         nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1201                                                                 protocol);
1202
1203         if (dev->poll_mod_count) {
1204                 nfc_dev_err(&dev->interface->dev, "Cannot activate while"
1205                                                                 " polling");
1206                 return -EBUSY;
1207         }
1208
1209         if (dev->tgt_active_prot) {
1210                 nfc_dev_err(&dev->interface->dev, "There is already an active"
1211                                                                 " target");
1212                 return -EBUSY;
1213         }
1214
1215         if (!dev->tgt_available_prots) {
1216                 nfc_dev_err(&dev->interface->dev, "There is no available target"
1217                                                                 " to activate");
1218                 return -EINVAL;
1219         }
1220
1221         if (!(dev->tgt_available_prots & (1 << protocol))) {
1222                 nfc_dev_err(&dev->interface->dev, "The target does not support"
1223                                         " the requested protocol %u", protocol);
1224                 return -EINVAL;
1225         }
1226
1227         if (protocol == NFC_PROTO_NFC_DEP) {
1228                 rc = pn533_activate_target_nfcdep(dev);
1229                 if (rc) {
1230                         nfc_dev_err(&dev->interface->dev, "Error %d when"
1231                                                 " activating target with"
1232                                                 " NFC_DEP protocol", rc);
1233                         return rc;
1234                 }
1235         }
1236
1237         dev->tgt_active_prot = protocol;
1238         dev->tgt_available_prots = 0;
1239
1240         return 0;
1241 }
1242
1243 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1244                                     struct nfc_target *target)
1245 {
1246         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1247         u8 tg;
1248         u8 status;
1249         int rc;
1250
1251         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1252
1253         if (!dev->tgt_active_prot) {
1254                 nfc_dev_err(&dev->interface->dev, "There is no active target");
1255                 return;
1256         }
1257
1258         dev->tgt_active_prot = 0;
1259
1260         skb_queue_purge(&dev->resp_q);
1261
1262         pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
1263
1264         tg = 1;
1265         memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
1266         dev->out_frame->datalen += sizeof(u8);
1267
1268         pn533_tx_frame_finish(dev->out_frame);
1269
1270         rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1271                                                                 dev->in_maxlen);
1272         if (rc) {
1273                 nfc_dev_err(&dev->interface->dev, "Error when sending release"
1274                                                 " command to the controller");
1275                 return;
1276         }
1277
1278         status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
1279         rc = status & PN533_CMD_RET_MASK;
1280         if (rc != PN533_CMD_RET_SUCCESS)
1281                 nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
1282                                                         " the target", rc);
1283
1284         return;
1285 }
1286
1287
1288 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1289                                                 u8 *params, int params_len)
1290 {
1291         struct pn533_cmd_jump_dep *cmd;
1292         struct pn533_cmd_jump_dep_response *resp;
1293         struct nfc_target nfc_target;
1294         u8 target_gt_len;
1295         int rc;
1296
1297         if (params_len == -ENOENT) {
1298                 nfc_dev_dbg(&dev->interface->dev, "");
1299                 return 0;
1300         }
1301
1302         if (params_len < 0) {
1303                 nfc_dev_err(&dev->interface->dev,
1304                                 "Error %d when bringing DEP link up",
1305                                                                 params_len);
1306                 return 0;
1307         }
1308
1309         if (dev->tgt_available_prots &&
1310             !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1311                 nfc_dev_err(&dev->interface->dev,
1312                         "The target does not support DEP");
1313                 return -EINVAL;
1314         }
1315
1316         resp = (struct pn533_cmd_jump_dep_response *) params;
1317         cmd = (struct pn533_cmd_jump_dep *) arg;
1318         rc = resp->status & PN533_CMD_RET_MASK;
1319         if (rc != PN533_CMD_RET_SUCCESS) {
1320                 nfc_dev_err(&dev->interface->dev,
1321                                 "Bringing DEP link up failed %d", rc);
1322                 return 0;
1323         }
1324
1325         if (!dev->tgt_available_prots) {
1326                 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1327
1328                 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1329                 nfc_target.nfcid1_len = 10;
1330                 memcpy(nfc_target.nfcid1, resp->nfcid3t, nfc_target.nfcid1_len);
1331                 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1332                 if (rc)
1333                         return 0;
1334
1335                 dev->tgt_available_prots = 0;
1336         }
1337
1338         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1339
1340         /* ATR_RES general bytes are located at offset 17 */
1341         target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17;
1342         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1343                                                 resp->gt, target_gt_len);
1344         if (rc == 0)
1345                 rc = nfc_dep_link_is_up(dev->nfc_dev,
1346                                                 dev->nfc_dev->targets[0].idx,
1347                                                 !cmd->active, NFC_RF_INITIATOR);
1348
1349         return 0;
1350 }
1351
1352 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1353                              u8 comm_mode, u8* gb, size_t gb_len)
1354 {
1355         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1356         struct pn533_cmd_jump_dep *cmd;
1357         u8 cmd_len;
1358         int rc;
1359
1360         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1361
1362         if (dev->poll_mod_count) {
1363                 nfc_dev_err(&dev->interface->dev,
1364                                 "Cannot bring the DEP link up while polling");
1365                 return -EBUSY;
1366         }
1367
1368         if (dev->tgt_active_prot) {
1369                 nfc_dev_err(&dev->interface->dev,
1370                                 "There is already an active target");
1371                 return -EBUSY;
1372         }
1373
1374         cmd_len = sizeof(struct pn533_cmd_jump_dep) + gb_len;
1375         cmd = kzalloc(cmd_len, GFP_KERNEL);
1376         if (cmd == NULL)
1377                 return -ENOMEM;
1378
1379         pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
1380
1381         cmd->active = !comm_mode;
1382         cmd->baud = 0;
1383         if (gb != NULL && gb_len > 0) {
1384                 cmd->next = 4; /* We have some Gi */
1385                 memcpy(cmd->gt, gb, gb_len);
1386         } else {
1387                 cmd->next = 0;
1388         }
1389
1390         memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len);
1391         dev->out_frame->datalen += cmd_len;
1392
1393         pn533_tx_frame_finish(dev->out_frame);
1394
1395         rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1396                                 dev->in_maxlen, pn533_in_dep_link_up_complete,
1397                                 cmd, GFP_KERNEL);
1398         if (rc)
1399                 goto out;
1400
1401
1402 out:
1403         kfree(cmd);
1404
1405         return rc;
1406 }
1407
1408 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1409 {
1410         pn533_deactivate_target(nfc_dev, 0);
1411
1412         return 0;
1413 }
1414
1415 #define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3)
1416 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1417
1418 static int pn533_data_exchange_tx_frame(struct pn533 *dev, struct sk_buff *skb)
1419 {
1420         int payload_len = skb->len;
1421         struct pn533_frame *out_frame;
1422         u8 tg;
1423
1424         nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__,
1425                                                                 payload_len);
1426
1427         if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
1428                 /* TODO: Implement support to multi-part data exchange */
1429                 nfc_dev_err(&dev->interface->dev, "Data length greater than the"
1430                                                 " max allowed: %d",
1431                                                 PN533_CMD_DATAEXCH_DATA_MAXLEN);
1432                 return -ENOSYS;
1433         }
1434
1435         skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN);
1436         out_frame = (struct pn533_frame *) skb->data;
1437
1438         pn533_tx_frame_init(out_frame, PN533_CMD_IN_DATA_EXCHANGE);
1439
1440         tg = 1;
1441         memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame), &tg, sizeof(u8));
1442         out_frame->datalen += sizeof(u8);
1443
1444         /* The data is already in the out_frame, just update the datalen */
1445         out_frame->datalen += payload_len;
1446
1447         pn533_tx_frame_finish(out_frame);
1448         skb_put(skb, PN533_FRAME_TAIL_SIZE);
1449
1450         return 0;
1451 }
1452
1453 struct pn533_data_exchange_arg {
1454         struct sk_buff *skb_resp;
1455         struct sk_buff *skb_out;
1456         data_exchange_cb_t cb;
1457         void *cb_context;
1458 };
1459
1460 static struct sk_buff *pn533_build_response(struct pn533 *dev)
1461 {
1462         struct sk_buff *skb, *tmp, *t;
1463         unsigned int skb_len = 0, tmp_len = 0;
1464
1465         nfc_dev_dbg(&dev->interface->dev, "%s\n", __func__);
1466
1467         if (skb_queue_empty(&dev->resp_q))
1468                 return NULL;
1469
1470         if (skb_queue_len(&dev->resp_q) == 1) {
1471                 skb = skb_dequeue(&dev->resp_q);
1472                 goto out;
1473         }
1474
1475         skb_queue_walk_safe(&dev->resp_q, tmp, t)
1476                 skb_len += tmp->len;
1477
1478         nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
1479                     __func__, skb_len);
1480
1481         skb = alloc_skb(skb_len, GFP_KERNEL);
1482         if (skb == NULL)
1483                 goto out;
1484
1485         skb_put(skb, skb_len);
1486
1487         skb_queue_walk_safe(&dev->resp_q, tmp, t) {
1488                 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
1489                 tmp_len += tmp->len;
1490         }
1491
1492 out:
1493         skb_queue_purge(&dev->resp_q);
1494
1495         return skb;
1496 }
1497
1498 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
1499                                                 u8 *params, int params_len)
1500 {
1501         struct pn533_data_exchange_arg *arg = _arg;
1502         struct sk_buff *skb = NULL, *skb_resp = arg->skb_resp;
1503         struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
1504         int err = 0;
1505         u8 status;
1506         u8 cmd_ret;
1507
1508         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1509
1510         dev_kfree_skb(arg->skb_out);
1511
1512         if (params_len < 0) { /* error */
1513                 err = params_len;
1514                 goto error;
1515         }
1516
1517         status = params[0];
1518
1519         cmd_ret = status & PN533_CMD_RET_MASK;
1520         if (cmd_ret != PN533_CMD_RET_SUCCESS) {
1521                 nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when"
1522                                                 " exchanging data", cmd_ret);
1523                 err = -EIO;
1524                 goto error;
1525         }
1526
1527         skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
1528         skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
1529         skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
1530         skb_queue_tail(&dev->resp_q, skb_resp);
1531
1532         if (status & PN533_CMD_MI_MASK) {
1533                 queue_work(dev->wq, &dev->mi_work);
1534                 return -EINPROGRESS;
1535         }
1536
1537         skb = pn533_build_response(dev);
1538         if (skb == NULL)
1539                 goto error;
1540
1541         arg->cb(arg->cb_context, skb, 0);
1542         kfree(arg);
1543         return 0;
1544
1545 error:
1546         skb_queue_purge(&dev->resp_q);
1547         dev_kfree_skb(skb_resp);
1548         arg->cb(arg->cb_context, NULL, err);
1549         kfree(arg);
1550         return 0;
1551 }
1552
1553 static int pn533_data_exchange(struct nfc_dev *nfc_dev,
1554                                struct nfc_target *target, struct sk_buff *skb,
1555                                data_exchange_cb_t cb, void *cb_context)
1556 {
1557         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1558         struct pn533_frame *out_frame, *in_frame;
1559         struct pn533_data_exchange_arg *arg;
1560         struct sk_buff *skb_resp;
1561         int skb_resp_len;
1562         int rc;
1563
1564         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1565
1566         if (!dev->tgt_active_prot) {
1567                 nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
1568                                                 " there is no active target");
1569                 rc = -EINVAL;
1570                 goto error;
1571         }
1572
1573         rc = pn533_data_exchange_tx_frame(dev, skb);
1574         if (rc)
1575                 goto error;
1576
1577         skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1578                         PN533_CMD_DATAEXCH_DATA_MAXLEN +
1579                         PN533_FRAME_TAIL_SIZE;
1580
1581         skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
1582         if (!skb_resp) {
1583                 rc = -ENOMEM;
1584                 goto error;
1585         }
1586
1587         in_frame = (struct pn533_frame *) skb_resp->data;
1588         out_frame = (struct pn533_frame *) skb->data;
1589
1590         arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL);
1591         if (!arg) {
1592                 rc = -ENOMEM;
1593                 goto free_skb_resp;
1594         }
1595
1596         arg->skb_resp = skb_resp;
1597         arg->skb_out = skb;
1598         arg->cb = cb;
1599         arg->cb_context = cb_context;
1600
1601         rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len,
1602                                         pn533_data_exchange_complete, arg,
1603                                         GFP_KERNEL);
1604         if (rc) {
1605                 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1606                                                 " perform data_exchange", rc);
1607                 goto free_arg;
1608         }
1609
1610         return 0;
1611
1612 free_arg:
1613         kfree(arg);
1614 free_skb_resp:
1615         kfree_skb(skb_resp);
1616 error:
1617         kfree_skb(skb);
1618         return rc;
1619 }
1620
1621 static void pn533_wq_mi_recv(struct work_struct *work)
1622 {
1623         struct pn533 *dev = container_of(work, struct pn533, mi_work);
1624         struct sk_buff *skb_cmd;
1625         struct pn533_data_exchange_arg *arg = dev->cmd_complete_arg;
1626         struct pn533_frame *out_frame, *in_frame;
1627         struct sk_buff *skb_resp;
1628         int skb_resp_len;
1629         int rc;
1630
1631         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1632
1633         /* This is a zero payload size skb */
1634         skb_cmd = alloc_skb(PN533_CMD_DATAEXCH_HEAD_LEN + PN533_FRAME_TAIL_SIZE,
1635                             GFP_KERNEL);
1636         if (skb_cmd == NULL)
1637                 goto error_cmd;
1638
1639         skb_reserve(skb_cmd, PN533_CMD_DATAEXCH_HEAD_LEN);
1640
1641         rc = pn533_data_exchange_tx_frame(dev, skb_cmd);
1642         if (rc)
1643                 goto error_frame;
1644
1645         skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1646                         PN533_CMD_DATAEXCH_DATA_MAXLEN +
1647                         PN533_FRAME_TAIL_SIZE;
1648         skb_resp = alloc_skb(skb_resp_len, GFP_KERNEL);
1649         if (!skb_resp) {
1650                 rc = -ENOMEM;
1651                 goto error_frame;
1652         }
1653
1654         in_frame = (struct pn533_frame *) skb_resp->data;
1655         out_frame = (struct pn533_frame *) skb_cmd->data;
1656
1657         arg->skb_resp = skb_resp;
1658         arg->skb_out = skb_cmd;
1659
1660         rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
1661                                           skb_resp_len,
1662                                           pn533_data_exchange_complete,
1663                                           dev->cmd_complete_arg, GFP_KERNEL);
1664         if (!rc)
1665                 return;
1666
1667         nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1668                                                 " perform data_exchange", rc);
1669
1670         kfree_skb(skb_resp);
1671
1672 error_frame:
1673         kfree_skb(skb_cmd);
1674
1675 error_cmd:
1676         pn533_send_ack(dev, GFP_KERNEL);
1677
1678         kfree(arg);
1679
1680         up(&dev->cmd_lock);
1681 }
1682
1683 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
1684                                                                 u8 cfgdata_len)
1685 {
1686         int rc;
1687         u8 *params;
1688
1689         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1690
1691         pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
1692
1693         params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
1694         params[0] = cfgitem;
1695         memcpy(&params[1], cfgdata, cfgdata_len);
1696         dev->out_frame->datalen += (1 + cfgdata_len);
1697
1698         pn533_tx_frame_finish(dev->out_frame);
1699
1700         rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1701                                                                 dev->in_maxlen);
1702
1703         return rc;
1704 }
1705
1706 struct nfc_ops pn533_nfc_ops = {
1707         .dev_up = NULL,
1708         .dev_down = NULL,
1709         .dep_link_up = pn533_dep_link_up,
1710         .dep_link_down = pn533_dep_link_down,
1711         .start_poll = pn533_start_poll,
1712         .stop_poll = pn533_stop_poll,
1713         .activate_target = pn533_activate_target,
1714         .deactivate_target = pn533_deactivate_target,
1715         .data_exchange = pn533_data_exchange,
1716 };
1717
1718 static int pn533_probe(struct usb_interface *interface,
1719                         const struct usb_device_id *id)
1720 {
1721         struct pn533_fw_version *fw_ver;
1722         struct pn533 *dev;
1723         struct usb_host_interface *iface_desc;
1724         struct usb_endpoint_descriptor *endpoint;
1725         struct pn533_config_max_retries max_retries;
1726         int in_endpoint = 0;
1727         int out_endpoint = 0;
1728         int rc = -ENOMEM;
1729         int i;
1730         u32 protocols;
1731
1732         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1733         if (!dev)
1734                 return -ENOMEM;
1735
1736         dev->udev = usb_get_dev(interface_to_usbdev(interface));
1737         dev->interface = interface;
1738         sema_init(&dev->cmd_lock, 1);
1739
1740         iface_desc = interface->cur_altsetting;
1741         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1742                 endpoint = &iface_desc->endpoint[i].desc;
1743
1744                 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1745                         dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize);
1746                         in_endpoint = endpoint->bEndpointAddress;
1747                 }
1748
1749                 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) {
1750                         dev->out_maxlen =
1751                                 le16_to_cpu(endpoint->wMaxPacketSize);
1752                         out_endpoint = endpoint->bEndpointAddress;
1753                 }
1754         }
1755
1756         if (!in_endpoint || !out_endpoint) {
1757                 nfc_dev_err(&interface->dev, "Could not find bulk-in or"
1758                                                         " bulk-out endpoint");
1759                 rc = -ENODEV;
1760                 goto error;
1761         }
1762
1763         dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
1764         dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1765         dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
1766         dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1767
1768         if (!dev->in_frame || !dev->out_frame ||
1769                 !dev->in_urb || !dev->out_urb)
1770                 goto error;
1771
1772         usb_fill_bulk_urb(dev->in_urb, dev->udev,
1773                         usb_rcvbulkpipe(dev->udev, in_endpoint),
1774                         NULL, 0, NULL, dev);
1775         usb_fill_bulk_urb(dev->out_urb, dev->udev,
1776                         usb_sndbulkpipe(dev->udev, out_endpoint),
1777                         NULL, 0,
1778                         pn533_send_complete, dev);
1779
1780         INIT_WORK(&dev->cmd_work, pn533_wq_cmd_complete);
1781         INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
1782         dev->wq = alloc_workqueue("pn533",
1783                                   WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
1784                                   1);
1785         if (dev->wq == NULL)
1786                 goto error;
1787
1788         skb_queue_head_init(&dev->resp_q);
1789
1790         usb_set_intfdata(interface, dev);
1791
1792         pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
1793         pn533_tx_frame_finish(dev->out_frame);
1794
1795         rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1796                                                                 dev->in_maxlen);
1797         if (rc)
1798                 goto destroy_wq;
1799
1800         fw_ver = (struct pn533_fw_version *)
1801                                 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1802         nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
1803                                         " attached", fw_ver->ver, fw_ver->rev);
1804
1805         protocols = NFC_PROTO_JEWEL_MASK
1806                         | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
1807                         | NFC_PROTO_ISO14443_MASK
1808                         | NFC_PROTO_NFC_DEP_MASK;
1809
1810         dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
1811                                            PN533_CMD_DATAEXCH_HEAD_LEN,
1812                                            PN533_FRAME_TAIL_SIZE);
1813         if (!dev->nfc_dev)
1814                 goto destroy_wq;
1815
1816         nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
1817         nfc_set_drvdata(dev->nfc_dev, dev);
1818
1819         rc = nfc_register_device(dev->nfc_dev);
1820         if (rc)
1821                 goto free_nfc_dev;
1822
1823         max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
1824         max_retries.mx_rty_psl = 2;
1825         max_retries.mx_rty_passive_act = PN533_CONFIG_MAX_RETRIES_NO_RETRY;
1826
1827         rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
1828                                 (u8 *) &max_retries, sizeof(max_retries));
1829
1830         if (rc) {
1831                 nfc_dev_err(&dev->interface->dev, "Error on setting MAX_RETRIES"
1832                                                                 " config");
1833                 goto free_nfc_dev;
1834         }
1835
1836         return 0;
1837
1838 free_nfc_dev:
1839         nfc_free_device(dev->nfc_dev);
1840 destroy_wq:
1841         destroy_workqueue(dev->wq);
1842 error:
1843         kfree(dev->in_frame);
1844         usb_free_urb(dev->in_urb);
1845         kfree(dev->out_frame);
1846         usb_free_urb(dev->out_urb);
1847         kfree(dev);
1848         return rc;
1849 }
1850
1851 static void pn533_disconnect(struct usb_interface *interface)
1852 {
1853         struct pn533 *dev;
1854
1855         dev = usb_get_intfdata(interface);
1856         usb_set_intfdata(interface, NULL);
1857
1858         nfc_unregister_device(dev->nfc_dev);
1859         nfc_free_device(dev->nfc_dev);
1860
1861         usb_kill_urb(dev->in_urb);
1862         usb_kill_urb(dev->out_urb);
1863
1864         destroy_workqueue(dev->wq);
1865
1866         skb_queue_purge(&dev->resp_q);
1867
1868         kfree(dev->in_frame);
1869         usb_free_urb(dev->in_urb);
1870         kfree(dev->out_frame);
1871         usb_free_urb(dev->out_urb);
1872         kfree(dev);
1873
1874         nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
1875 }
1876
1877 static struct usb_driver pn533_driver = {
1878         .name =         "pn533",
1879         .probe =        pn533_probe,
1880         .disconnect =   pn533_disconnect,
1881         .id_table =     pn533_table,
1882 };
1883
1884 module_usb_driver(pn533_driver);
1885
1886 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
1887                         " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
1888 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
1889 MODULE_VERSION(VERSION);
1890 MODULE_LICENSE("GPL");