drivers/nfc/pn533.c

   1 /*
   2  * Copyright (C) 2011 Instituto Nokia de Tecnologia
   3  * Copyright (C) 2012-2013 Tieto Poland
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the
  17  * Free Software Foundation, Inc.,
  18  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include <linux/device.h>
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/slab.h>
  25 #include <linux/usb.h>
  26 #include <linux/nfc.h>
  27 #include <linux/netdevice.h>
  28 #include <net/nfc/nfc.h>
  29
  30 #define VERSION "0.1"
  31
  32 #define PN533_VENDOR_ID 0x4CC
  33 #define PN533_PRODUCT_ID 0x2533
  34
  35 #define SCM_VENDOR_ID 0x4E6
  36 #define SCL3711_PRODUCT_ID 0x5591
  37
  38 #define SONY_VENDOR_ID         0x054c
  39 #define PASORI_PRODUCT_ID      0x02e1
  40
  41 #define PN533_DEVICE_STD    0x1
  42 #define PN533_DEVICE_PASORI 0x2
  43
  44 #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
  45                              NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
  46                              NFC_PROTO_NFC_DEP_MASK |\
  47                              NFC_PROTO_ISO14443_B_MASK)
  48
  49 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
  50                                    NFC_PROTO_MIFARE_MASK | \
  51                                    NFC_PROTO_FELICA_MASK | \
  52                                    NFC_PROTO_ISO14443_MASK | \
  53                                    NFC_PROTO_NFC_DEP_MASK)
  54
  55 static const struct usb_device_id pn533_table[] = {
  56         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  57           .idVendor             = PN533_VENDOR_ID,
  58           .idProduct            = PN533_PRODUCT_ID,
  59           .driver_info          = PN533_DEVICE_STD,
  60         },
  61         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  62           .idVendor             = SCM_VENDOR_ID,
  63           .idProduct            = SCL3711_PRODUCT_ID,
  64           .driver_info          = PN533_DEVICE_STD,
  65         },
  66         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  67           .idVendor             = SONY_VENDOR_ID,
  68           .idProduct            = PASORI_PRODUCT_ID,
  69           .driver_info          = PN533_DEVICE_PASORI,
  70         },
  71         { }
  72 };
  73 MODULE_DEVICE_TABLE(usb, pn533_table);
  74
  75 /* How much time we spend listening for initiators */
  76 #define PN533_LISTEN_TIME 2
  77
  78 /* Standard pn533 frame definitions */
  79 #define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
  80                                         + 2) /* data[0] TFI, data[1] CC */
  81 #define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
  82
  83 /*
  84  * Max extended frame payload len, excluding TFI and CC
  85  * which are already in PN533_FRAME_HEADER_LEN.
  86  */
  87 #define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
  88
  89 #define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
  90                                   Postamble (1) */
  91 #define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
  92 #define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
  93
  94 /* start of frame */
  95 #define PN533_STD_FRAME_SOF 0x00FF
  96
  97 /* standard frame identifier: in/out/error */
  98 #define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
  99 #define PN533_STD_FRAME_DIR_OUT 0xD4
 100 #define PN533_STD_FRAME_DIR_IN 0xD5
 101
 102 /* PN533 Commands */
 103 #define PN533_STD_FRAME_CMD(f) (f->data[1])
 104
 105 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
 106 #define PN533_CMD_RF_CONFIGURATION 0x32
 107 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
 108 #define PN533_CMD_IN_COMM_THRU     0x42
 109 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
 110 #define PN533_CMD_IN_ATR 0x50
 111 #define PN533_CMD_IN_RELEASE 0x52
 112 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
 113
 114 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
 115 #define PN533_CMD_TG_GET_DATA 0x86
 116 #define PN533_CMD_TG_SET_DATA 0x8e
 117 #define PN533_CMD_UNDEF 0xff
 118
 119 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
 120
 121 /* PN533 Return codes */
 122 #define PN533_CMD_RET_MASK 0x3F
 123 #define PN533_CMD_MI_MASK 0x40
 124 #define PN533_CMD_RET_SUCCESS 0x00
 125
 126 struct pn533;
 127
 128 typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg, int status);
 129
 130 typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
 131                                         struct sk_buff *resp);
 132
 133 /* structs for pn533 commands */
 134
 135 /* PN533_CMD_GET_FIRMWARE_VERSION */
 136 struct pn533_fw_version {
 137         u8 ic;
 138         u8 ver;
 139         u8 rev;
 140         u8 support;
 141 };
 142
 143 /* PN533_CMD_RF_CONFIGURATION */
 144 #define PN533_CFGITEM_TIMING 0x02
 145 #define PN533_CFGITEM_MAX_RETRIES 0x05
 146 #define PN533_CFGITEM_PASORI 0x82
 147
 148 #define PN533_CONFIG_TIMING_102 0xb
 149 #define PN533_CONFIG_TIMING_204 0xc
 150 #define PN533_CONFIG_TIMING_409 0xd
 151 #define PN533_CONFIG_TIMING_819 0xe
 152
 153 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
 154 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
 155
 156 struct pn533_config_max_retries {
 157         u8 mx_rty_atr;
 158         u8 mx_rty_psl;
 159         u8 mx_rty_passive_act;
 160 } __packed;
 161
 162 struct pn533_config_timing {
 163         u8 rfu;
 164         u8 atr_res_timeout;
 165         u8 dep_timeout;
 166 } __packed;
 167
 168 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
 169
 170 /* felica commands opcode */
 171 #define PN533_FELICA_OPC_SENSF_REQ 0
 172 #define PN533_FELICA_OPC_SENSF_RES 1
 173 /* felica SENSF_REQ parameters */
 174 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
 175 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
 176 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
 177 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
 178
 179 /* type B initiator_data values */
 180 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
 181 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
 182 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
 183
 184 union pn533_cmd_poll_initdata {
 185         struct {
 186                 u8 afi;
 187                 u8 polling_method;
 188         } __packed type_b;
 189         struct {
 190                 u8 opcode;
 191                 __be16 sc;
 192                 u8 rc;
 193                 u8 tsn;
 194         } __packed felica;
 195 };
 196
 197 /* Poll modulations */
 198 enum {
 199         PN533_POLL_MOD_106KBPS_A,
 200         PN533_POLL_MOD_212KBPS_FELICA,
 201         PN533_POLL_MOD_424KBPS_FELICA,
 202         PN533_POLL_MOD_106KBPS_JEWEL,
 203         PN533_POLL_MOD_847KBPS_B,
 204         PN533_LISTEN_MOD,
 205
 206         __PN533_POLL_MOD_AFTER_LAST,
 207 };
 208 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
 209
 210 struct pn533_poll_modulations {
 211         struct {
 212                 u8 maxtg;
 213                 u8 brty;
 214                 union pn533_cmd_poll_initdata initiator_data;
 215         } __packed data;
 216         u8 len;
 217 };
 218
 219 static const struct pn533_poll_modulations poll_mod[] = {
 220         [PN533_POLL_MOD_106KBPS_A] = {
 221                 .data = {
 222                         .maxtg = 1,
 223                         .brty = 0,
 224                 },
 225                 .len = 2,
 226         },
 227         [PN533_POLL_MOD_212KBPS_FELICA] = {
 228                 .data = {
 229                         .maxtg = 1,
 230                         .brty = 1,
 231                         .initiator_data.felica = {
 232                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 233                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 234                                 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
 235                                 .tsn = 0,
 236                         },
 237                 },
 238                 .len = 7,
 239         },
 240         [PN533_POLL_MOD_424KBPS_FELICA] = {
 241                 .data = {
 242                         .maxtg = 1,
 243                         .brty = 2,
 244                         .initiator_data.felica = {
 245                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 246                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 247                                 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
 248                                 .tsn = 0,
 249                         },
 250                  },
 251                 .len = 7,
 252         },
 253         [PN533_POLL_MOD_106KBPS_JEWEL] = {
 254                 .data = {
 255                         .maxtg = 1,
 256                         .brty = 4,
 257                 },
 258                 .len = 2,
 259         },
 260         [PN533_POLL_MOD_847KBPS_B] = {
 261                 .data = {
 262                         .maxtg = 1,
 263                         .brty = 8,
 264                         .initiator_data.type_b = {
 265                                 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
 266                                 .polling_method =
 267                                         PN533_TYPE_B_POLL_METHOD_TIMESLOT,
 268                         },
 269                 },
 270                 .len = 3,
 271         },
 272         [PN533_LISTEN_MOD] = {
 273                 .len = 0,
 274         },
 275 };
 276
 277 /* PN533_CMD_IN_ATR */
 278
 279 struct pn533_cmd_activate_response {
 280         u8 status;
 281         u8 nfcid3t[10];
 282         u8 didt;
 283         u8 bst;
 284         u8 brt;
 285         u8 to;
 286         u8 ppt;
 287         /* optional */
 288         u8 gt[];
 289 } __packed;
 290
 291 struct pn533_cmd_jump_dep_response {
 292         u8 status;
 293         u8 tg;
 294         u8 nfcid3t[10];
 295         u8 didt;
 296         u8 bst;
 297         u8 brt;
 298         u8 to;
 299         u8 ppt;
 300         /* optional */
 301         u8 gt[];
 302 } __packed;
 303
 304
 305 /* PN533_TG_INIT_AS_TARGET */
 306 #define PN533_INIT_TARGET_PASSIVE 0x1
 307 #define PN533_INIT_TARGET_DEP 0x2
 308
 309 #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
 310 #define PN533_INIT_TARGET_RESP_ACTIVE     0x1
 311 #define PN533_INIT_TARGET_RESP_DEP        0x4
 312
 313 struct pn533 {
 314         struct usb_device *udev;
 315         struct usb_interface *interface;
 316         struct nfc_dev *nfc_dev;
 317
 318         struct urb *out_urb;
 319         struct urb *in_urb;
 320
 321         struct sk_buff_head resp_q;
 322
 323         struct workqueue_struct *wq;
 324         struct work_struct cmd_work;
 325         struct work_struct cmd_complete_work;
 326         struct work_struct poll_work;
 327         struct work_struct mi_work;
 328         struct work_struct tg_work;
 329         struct timer_list listen_timer;
 330         int wq_in_error;
 331         int cancel_listen;
 332
 333         pn533_cmd_complete_t cmd_complete;
 334         void *cmd_complete_arg;
 335         void *cmd_complete_mi_arg;
 336         struct mutex cmd_lock;
 337         u8 cmd;
 338
 339         struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
 340         u8 poll_mod_count;
 341         u8 poll_mod_curr;
 342         u32 poll_protocols;
 343         u32 listen_protocols;
 344
 345         u8 *gb;
 346         size_t gb_len;
 347
 348         u8 tgt_available_prots;
 349         u8 tgt_active_prot;
 350         u8 tgt_mode;
 351
 352         u32 device_type;
 353
 354         struct list_head cmd_queue;
 355         u8 cmd_pending;
 356
 357         struct pn533_frame_ops *ops;
 358 };
 359
 360 struct pn533_cmd {
 361         struct list_head queue;
 362         u8 cmd_code;
 363         struct sk_buff *req;
 364         struct sk_buff *resp;
 365         int resp_len;
 366         void *arg;
 367 };
 368
 369 struct pn533_std_frame {
 370         u8 preamble;
 371         __be16 start_frame;
 372         u8 datalen;
 373         u8 datalen_checksum;
 374         u8 data[];
 375 } __packed;
 376
 377 struct pn533_frame_ops {
 378         void (*tx_frame_init)(void *frame, u8 cmd_code);
 379         void (*tx_frame_finish)(void *frame);
 380         void (*tx_update_payload_len)(void *frame, int len);
 381         int tx_header_len;
 382         int tx_tail_len;
 383
 384         bool (*rx_is_frame_valid)(void *frame);
 385         int (*rx_frame_size)(void *frame);
 386         int rx_header_len;
 387         int rx_tail_len;
 388
 389         int max_payload_len;
 390         u8 (*get_cmd_code)(void *frame);
 391 };
 392
 393 /* The rule: value + checksum = 0 */
 394 static inline u8 pn533_std_checksum(u8 value)
 395 {
 396         return ~value + 1;
 397 }
 398
 399 /* The rule: sum(data elements) + checksum = 0 */
 400 static u8 pn533_std_data_checksum(u8 *data, int datalen)
 401 {
 402         u8 sum = 0;
 403         int i;
 404
 405         for (i = 0; i < datalen; i++)
 406                 sum += data[i];
 407
 408         return pn533_std_checksum(sum);
 409 }
 410
 411 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
 412 {
 413         struct pn533_std_frame *frame = _frame;
 414
 415         frame->preamble = 0;
 416         frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
 417         PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
 418         PN533_STD_FRAME_CMD(frame) = cmd_code;
 419         frame->datalen = 2;
 420 }
 421
 422 static void pn533_std_tx_frame_finish(void *_frame)
 423 {
 424         struct pn533_std_frame *frame = _frame;
 425
 426         frame->datalen_checksum = pn533_std_checksum(frame->datalen);
 427
 428         PN533_STD_FRAME_CHECKSUM(frame) =
 429                 pn533_std_data_checksum(frame->data, frame->datalen);
 430
 431         PN533_STD_FRAME_POSTAMBLE(frame) = 0;
 432 }
 433
 434 static void pn533_std_tx_update_payload_len(void *_frame, int len)
 435 {
 436         struct pn533_std_frame *frame = _frame;
 437
 438         frame->datalen += len;
 439 }
 440
 441 static bool pn533_std_rx_frame_is_valid(void *_frame)
 442 {
 443         u8 checksum;
 444         struct pn533_std_frame *frame = _frame;
 445
 446         if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
 447                 return false;
 448
 449         checksum = pn533_std_checksum(frame->datalen);
 450         if (checksum != frame->datalen_checksum)
 451                 return false;
 452
 453         checksum = pn533_std_data_checksum(frame->data, frame->datalen);
 454         if (checksum != PN533_STD_FRAME_CHECKSUM(frame))
 455                 return false;
 456
 457         return true;
 458 }
 459
 460 static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
 461 {
 462         if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
 463                 return false;
 464
 465         if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
 466                 return false;
 467
 468         return true;
 469 }
 470
 471 static inline int pn533_std_rx_frame_size(void *frame)
 472 {
 473         struct pn533_std_frame *f = frame;
 474
 475         return sizeof(struct pn533_std_frame) + f->datalen +
 476                PN533_STD_FRAME_TAIL_LEN;
 477 }
 478
 479 static u8 pn533_std_get_cmd_code(void *frame)
 480 {
 481         struct pn533_std_frame *f = frame;
 482
 483         return PN533_STD_FRAME_CMD(f);
 484 }
 485
 486 static struct pn533_frame_ops pn533_std_frame_ops = {
 487         .tx_frame_init = pn533_std_tx_frame_init,
 488         .tx_frame_finish = pn533_std_tx_frame_finish,
 489         .tx_update_payload_len = pn533_std_tx_update_payload_len,
 490         .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
 491         .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
 492
 493         .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
 494         .rx_frame_size = pn533_std_rx_frame_size,
 495         .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
 496         .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
 497
 498         .max_payload_len =  PN533_STD_FRAME_MAX_PAYLOAD_LEN,
 499         .get_cmd_code = pn533_std_get_cmd_code,
 500 };
 501
 502 static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
 503 {
 504         return (dev->ops->get_cmd_code(frame) == PN533_CMD_RESPONSE(dev->cmd));
 505 }
 506
 507
 508 static void pn533_wq_cmd_complete(struct work_struct *work)
 509 {
 510         struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
 511         int rc;
 512
 513         rc = dev->cmd_complete(dev, dev->cmd_complete_arg, dev->wq_in_error);
 514         if (rc != -EINPROGRESS)
 515                 queue_work(dev->wq, &dev->cmd_work);
 516 }
 517
 518 static void pn533_recv_response(struct urb *urb)
 519 {
 520         struct pn533 *dev = urb->context;
 521         u8 *in_frame;
 522
 523         switch (urb->status) {
 524         case 0:
 525                 break; /* success */
 526         case -ECONNRESET:
 527         case -ENOENT:
 528                 nfc_dev_dbg(&dev->interface->dev,
 529                             "The urb has been canceled (status %d)",
 530                             urb->status);
 531                 dev->wq_in_error = urb->status;
 532                 goto sched_wq;
 533         case -ESHUTDOWN:
 534         default:
 535                 nfc_dev_err(&dev->interface->dev,
 536                             "Urb failure (status %d)", urb->status);
 537                 dev->wq_in_error = urb->status;
 538                 goto sched_wq;
 539         }
 540
 541         in_frame = dev->in_urb->transfer_buffer;
 542
 543         nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
 544         print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
 545                              dev->ops->rx_frame_size(in_frame), false);
 546
 547         if (!dev->ops->rx_is_frame_valid(in_frame)) {
 548                 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
 549                 dev->wq_in_error = -EIO;
 550                 goto sched_wq;
 551         }
 552
 553         if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
 554                 nfc_dev_err(&dev->interface->dev,
 555                             "It it not the response to the last command");
 556                 dev->wq_in_error = -EIO;
 557                 goto sched_wq;
 558         }
 559
 560         dev->wq_in_error = 0;
 561
 562 sched_wq:
 563         queue_work(dev->wq, &dev->cmd_complete_work);
 564 }
 565
 566 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
 567 {
 568         dev->in_urb->complete = pn533_recv_response;
 569
 570         return usb_submit_urb(dev->in_urb, flags);
 571 }
 572
 573 static void pn533_recv_ack(struct urb *urb)
 574 {
 575         struct pn533 *dev = urb->context;
 576         struct pn533_std_frame *in_frame;
 577         int rc;
 578
 579         switch (urb->status) {
 580         case 0:
 581                 break; /* success */
 582         case -ECONNRESET:
 583         case -ENOENT:
 584                 nfc_dev_dbg(&dev->interface->dev,
 585                             "The urb has been stopped (status %d)",
 586                             urb->status);
 587                 dev->wq_in_error = urb->status;
 588                 goto sched_wq;
 589         case -ESHUTDOWN:
 590         default:
 591                 nfc_dev_err(&dev->interface->dev,
 592                             "Urb failure (status %d)", urb->status);
 593                 dev->wq_in_error = urb->status;
 594                 goto sched_wq;
 595         }
 596
 597         in_frame = dev->in_urb->transfer_buffer;
 598
 599         if (!pn533_std_rx_frame_is_ack(in_frame)) {
 600                 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
 601                 dev->wq_in_error = -EIO;
 602                 goto sched_wq;
 603         }
 604
 605         rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
 606         if (rc) {
 607                 nfc_dev_err(&dev->interface->dev,
 608                             "usb_submit_urb failed with result %d", rc);
 609                 dev->wq_in_error = rc;
 610                 goto sched_wq;
 611         }
 612
 613         return;
 614
 615 sched_wq:
 616         queue_work(dev->wq, &dev->cmd_complete_work);
 617 }
 618
 619 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
 620 {
 621         dev->in_urb->complete = pn533_recv_ack;
 622
 623         return usb_submit_urb(dev->in_urb, flags);
 624 }
 625
 626 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
 627 {
 628         u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
 629         /* spec 7.1.1.3:  Preamble, SoPC (2), ACK Code (2), Postamble */
 630         int rc;
 631
 632         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 633
 634         dev->out_urb->transfer_buffer = ack;
 635         dev->out_urb->transfer_buffer_length = sizeof(ack);
 636         rc = usb_submit_urb(dev->out_urb, flags);
 637
 638         return rc;
 639 }
 640
 641 static int __pn533_send_frame_async(struct pn533 *dev,
 642                                         struct sk_buff *out,
 643                                         struct sk_buff *in,
 644                                         int in_len,
 645                                         pn533_cmd_complete_t cmd_complete,
 646                                         void *arg)
 647 {
 648         int rc;
 649
 650         dev->cmd = dev->ops->get_cmd_code(out->data);
 651         dev->cmd_complete = cmd_complete;
 652         dev->cmd_complete_arg = arg;
 653
 654         dev->out_urb->transfer_buffer = out->data;
 655         dev->out_urb->transfer_buffer_length = out->len;
 656
 657         dev->in_urb->transfer_buffer = in->data;
 658         dev->in_urb->transfer_buffer_length = in_len;
 659
 660         print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
 661                              out->data, out->len, false);
 662
 663         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
 664         if (rc)
 665                 return rc;
 666
 667         rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
 668         if (rc)
 669                 goto error;
 670
 671         return 0;
 672
 673 error:
 674         usb_unlink_urb(dev->out_urb);
 675         return rc;
 676 }
 677
 678 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
 679                                   struct sk_buff *skb)
 680 {
 681         /* payload is already there, just update datalen */
 682         int payload_len = skb->len;
 683         struct pn533_frame_ops *ops = dev->ops;
 684
 685
 686         skb_push(skb, ops->tx_header_len);
 687         skb_put(skb, ops->tx_tail_len);
 688
 689         ops->tx_frame_init(skb->data, cmd_code);
 690         ops->tx_update_payload_len(skb->data, payload_len);
 691         ops->tx_frame_finish(skb->data);
 692 }
 693
 694 struct pn533_send_async_complete_arg {
 695         pn533_send_async_complete_t  complete_cb;
 696         void *complete_cb_context;
 697         struct sk_buff *resp;
 698         struct sk_buff *req;
 699 };
 700
 701 static int pn533_send_async_complete(struct pn533 *dev, void *_arg, int status)
 702 {
 703         struct pn533_send_async_complete_arg *arg = _arg;
 704
 705         struct sk_buff *req = arg->req;
 706         struct sk_buff *resp = arg->resp;
 707
 708         int rc;
 709
 710         dev_kfree_skb(req);
 711
 712         if (status < 0) {
 713                 arg->complete_cb(dev, arg->complete_cb_context,
 714                                  ERR_PTR(status));
 715                 dev_kfree_skb(resp);
 716                 kfree(arg);
 717                 return status;
 718         }
 719
 720         skb_put(resp, dev->ops->rx_frame_size(resp->data));
 721         skb_pull(resp, dev->ops->rx_header_len);
 722         skb_trim(resp, resp->len - dev->ops->rx_tail_len);
 723
 724         rc = arg->complete_cb(dev, arg->complete_cb_context, resp);
 725
 726         kfree(arg);
 727         return rc;
 728 }
 729
 730 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
 731                               struct sk_buff *req, struct sk_buff *resp,
 732                               int resp_len,
 733                               pn533_send_async_complete_t complete_cb,
 734                               void *complete_cb_context)
 735 {
 736         struct pn533_cmd *cmd;
 737         struct pn533_send_async_complete_arg *arg;
 738         int rc = 0;
 739
 740         nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
 741
 742         arg = kzalloc(sizeof(*arg), GFP_KERNEL);
 743         if (!arg)
 744                 return -ENOMEM;
 745
 746         arg->complete_cb = complete_cb;
 747         arg->complete_cb_context = complete_cb_context;
 748         arg->resp = resp;
 749         arg->req = req;
 750
 751         pn533_build_cmd_frame(dev, cmd_code, req);
 752
 753         mutex_lock(&dev->cmd_lock);
 754
 755         if (!dev->cmd_pending) {
 756                 rc = __pn533_send_frame_async(dev, req, resp, resp_len,
 757                                               pn533_send_async_complete, arg);
 758                 if (rc)
 759                         goto error;
 760
 761                 dev->cmd_pending = 1;
 762                 goto unlock;
 763         }
 764
 765         nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
 766                     cmd_code);
 767
 768         cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL);
 769         if (!cmd) {
 770                 rc = -ENOMEM;
 771                 goto error;
 772         }
 773
 774         INIT_LIST_HEAD(&cmd->queue);
 775         cmd->cmd_code = cmd_code;
 776         cmd->req = req;
 777         cmd->resp = resp;
 778         cmd->resp_len = resp_len;
 779         cmd->arg = arg;
 780
 781         list_add_tail(&cmd->queue, &dev->cmd_queue);
 782
 783         goto unlock;
 784
 785 error:
 786         kfree(arg);
 787 unlock:
 788         mutex_unlock(&dev->cmd_lock);
 789         return rc;
 790 }
 791
 792 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
 793                                  struct sk_buff *req,
 794                                  pn533_send_async_complete_t complete_cb,
 795                                  void *complete_cb_context)
 796 {
 797         struct sk_buff *resp;
 798         int rc;
 799         int  resp_len = dev->ops->rx_header_len +
 800                         dev->ops->max_payload_len +
 801                         dev->ops->rx_tail_len;
 802
 803         resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
 804         if (!resp)
 805                 return -ENOMEM;
 806
 807         rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
 808                                 complete_cb_context);
 809         if (rc)
 810                 dev_kfree_skb(resp);
 811
 812         return rc;
 813 }
 814
 815 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
 816                                 struct sk_buff *req,
 817                                 pn533_send_async_complete_t complete_cb,
 818                                 void *complete_cb_context)
 819 {
 820         struct sk_buff *resp;
 821         int rc;
 822         int  resp_len = dev->ops->rx_header_len +
 823                         dev->ops->max_payload_len +
 824                         dev->ops->rx_tail_len;
 825
 826         resp = alloc_skb(resp_len, GFP_KERNEL);
 827         if (!resp)
 828                 return -ENOMEM;
 829
 830         rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
 831                                 complete_cb_context);
 832         if (rc)
 833                 dev_kfree_skb(resp);
 834
 835         return rc;
 836 }
 837
 838 /*
 839  * pn533_send_cmd_direct_async
 840  *
 841  * The function sends a piority cmd directly to the chip omiting the cmd
 842  * queue. It's intended to be used by chaining mechanism of received responses
 843  * where the host has to request every single chunk of data before scheduling
 844  * next cmd from the queue.
 845  */
 846 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
 847                                        struct sk_buff *req,
 848                                        pn533_send_async_complete_t complete_cb,
 849                                        void *complete_cb_context)
 850 {
 851         struct pn533_send_async_complete_arg *arg;
 852         struct sk_buff *resp;
 853         int rc;
 854         int resp_len = dev->ops->rx_header_len +
 855                        dev->ops->max_payload_len +
 856                        dev->ops->rx_tail_len;
 857
 858         resp = alloc_skb(resp_len, GFP_KERNEL);
 859         if (!resp)
 860                 return -ENOMEM;
 861
 862         arg = kzalloc(sizeof(*arg), GFP_KERNEL);
 863         if (!arg) {
 864                 dev_kfree_skb(resp);
 865                 return -ENOMEM;
 866         }
 867
 868         arg->complete_cb = complete_cb;
 869         arg->complete_cb_context = complete_cb_context;
 870         arg->resp = resp;
 871         arg->req = req;
 872
 873         pn533_build_cmd_frame(dev, cmd_code, req);
 874
 875         rc = __pn533_send_frame_async(dev, req, resp, resp_len,
 876                                       pn533_send_async_complete, arg);
 877         if (rc < 0) {
 878                 dev_kfree_skb(resp);
 879                 kfree(arg);
 880         }
 881
 882         return rc;
 883 }
 884
 885 static void pn533_wq_cmd(struct work_struct *work)
 886 {
 887         struct pn533 *dev = container_of(work, struct pn533, cmd_work);
 888         struct pn533_cmd *cmd;
 889
 890         mutex_lock(&dev->cmd_lock);
 891
 892         if (list_empty(&dev->cmd_queue)) {
 893                 dev->cmd_pending = 0;
 894                 mutex_unlock(&dev->cmd_lock);
 895                 return;
 896         }
 897
 898         cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
 899
 900         list_del(&cmd->queue);
 901
 902         mutex_unlock(&dev->cmd_lock);
 903
 904         __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len,
 905                                  pn533_send_async_complete, cmd->arg);
 906
 907         kfree(cmd);
 908 }
 909
 910 struct pn533_sync_cmd_response {
 911         struct sk_buff *resp;
 912         struct completion done;
 913 };
 914
 915 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
 916                                     struct sk_buff *resp)
 917 {
 918         struct pn533_sync_cmd_response *arg = _arg;
 919
 920         arg->resp = resp;
 921         complete(&arg->done);
 922
 923         return 0;
 924 }
 925
 926 /*  pn533_send_cmd_sync
 927  *
 928  *  Please note the req parameter is freed inside the function to
 929  *  limit a number of return value interpretations by the caller.
 930  *
 931  *  1. negative in case of error during TX path -> req should be freed
 932  *
 933  *  2. negative in case of error during RX path -> req should not be freed
 934  *     as it's been already freed at the begining of RX path by
 935  *     async_complete_cb.
 936  *
 937  *  3. valid pointer in case of succesfult RX path
 938  *
 939  *  A caller has to check a return value with IS_ERR macro. If the test pass,
 940  *  the returned pointer is valid.
 941  *
 942  * */
 943 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
 944                                                struct sk_buff *req)
 945 {
 946         int rc;
 947         struct pn533_sync_cmd_response arg;
 948
 949         init_completion(&arg.done);
 950
 951         rc = pn533_send_cmd_async(dev, cmd_code, req,
 952                                   pn533_send_sync_complete, &arg);
 953         if (rc) {
 954                 dev_kfree_skb(req);
 955                 return ERR_PTR(rc);
 956         }
 957
 958         wait_for_completion(&arg.done);
 959
 960         return arg.resp;
 961 }
 962
 963 static void pn533_send_complete(struct urb *urb)
 964 {
 965         struct pn533 *dev = urb->context;
 966
 967         switch (urb->status) {
 968         case 0:
 969                 break; /* success */
 970         case -ECONNRESET:
 971         case -ENOENT:
 972                 nfc_dev_dbg(&dev->interface->dev,
 973                             "The urb has been stopped (status %d)",
 974                             urb->status);
 975                 break;
 976         case -ESHUTDOWN:
 977         default:
 978                 nfc_dev_err(&dev->interface->dev,
 979                             "Urb failure (status %d)", urb->status);
 980         }
 981 }
 982
 983 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
 984 {
 985         struct sk_buff *skb;
 986
 987         skb = alloc_skb(dev->ops->tx_header_len +
 988                         size +
 989                         dev->ops->tx_tail_len, GFP_KERNEL);
 990
 991         if (skb)
 992                 skb_reserve(skb, dev->ops->tx_header_len);
 993
 994         return skb;
 995 }
 996
 997 struct pn533_target_type_a {
 998         __be16 sens_res;
 999         u8 sel_res;
1000         u8 nfcid_len;
1001         u8 nfcid_data[];
1002 } __packed;
1003
1004
1005 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1006 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1007 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1008
1009 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1010 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1011
1012 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1013 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1014
1015 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
1016 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
1017 #define PN533_TYPE_A_SEL_PROT_DEP 2
1018 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1019
1020 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1021                                                         int target_data_len)
1022 {
1023         u8 ssd;
1024         u8 platconf;
1025
1026         if (target_data_len < sizeof(struct pn533_target_type_a))
1027                 return false;
1028
1029         /* The lenght check of nfcid[] and ats[] are not being performed because
1030            the values are not being used */
1031
1032         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1033         ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1034         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1035
1036         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1037              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1038             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1039              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1040                 return false;
1041
1042         /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1043         if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1044                 return false;
1045
1046         return true;
1047 }
1048
1049 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1050                                                         int tgt_data_len)
1051 {
1052         struct pn533_target_type_a *tgt_type_a;
1053
1054         tgt_type_a = (struct pn533_target_type_a *)tgt_data;
1055
1056         if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1057                 return -EPROTO;
1058
1059         switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1060         case PN533_TYPE_A_SEL_PROT_MIFARE:
1061                 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1062                 break;
1063         case PN533_TYPE_A_SEL_PROT_ISO14443:
1064                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1065                 break;
1066         case PN533_TYPE_A_SEL_PROT_DEP:
1067                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1068                 break;
1069         case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1070                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1071                                                         NFC_PROTO_NFC_DEP_MASK;
1072                 break;
1073         }
1074
1075         nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1076         nfc_tgt->sel_res = tgt_type_a->sel_res;
1077         nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1078         memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
1079
1080         return 0;
1081 }
1082
1083 struct pn533_target_felica {
1084         u8 pol_res;
1085         u8 opcode;
1086         u8 nfcid2[8];
1087         u8 pad[8];
1088         /* optional */
1089         u8 syst_code[];
1090 } __packed;
1091
1092 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1093 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1094
1095 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1096                                                         int target_data_len)
1097 {
1098         if (target_data_len < sizeof(struct pn533_target_felica))
1099                 return false;
1100
1101         if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1102                 return false;
1103
1104         return true;
1105 }
1106
1107 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1108                                                         int tgt_data_len)
1109 {
1110         struct pn533_target_felica *tgt_felica;
1111
1112         tgt_felica = (struct pn533_target_felica *)tgt_data;
1113
1114         if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1115                 return -EPROTO;
1116
1117         if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1118             (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
1119                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1120         else
1121                 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1122
1123         memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1124         nfc_tgt->sensf_res_len = 9;
1125
1126         return 0;
1127 }
1128
1129 struct pn533_target_jewel {
1130         __be16 sens_res;
1131         u8 jewelid[4];
1132 } __packed;
1133
1134 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1135                                                         int target_data_len)
1136 {
1137         u8 ssd;
1138         u8 platconf;
1139
1140         if (target_data_len < sizeof(struct pn533_target_jewel))
1141                 return false;
1142
1143         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1144         ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1145         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1146
1147         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1148              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1149             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1150              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1151                 return false;
1152
1153         return true;
1154 }
1155
1156 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1157                                                         int tgt_data_len)
1158 {
1159         struct pn533_target_jewel *tgt_jewel;
1160
1161         tgt_jewel = (struct pn533_target_jewel *)tgt_data;
1162
1163         if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1164                 return -EPROTO;
1165
1166         nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1167         nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
1168         nfc_tgt->nfcid1_len = 4;
1169         memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
1170
1171         return 0;
1172 }
1173
1174 struct pn533_type_b_prot_info {
1175         u8 bitrate;
1176         u8 fsci_type;
1177         u8 fwi_adc_fo;
1178 } __packed;
1179
1180 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1181 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1182 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1183
1184 struct pn533_type_b_sens_res {
1185         u8 opcode;
1186         u8 nfcid[4];
1187         u8 appdata[4];
1188         struct pn533_type_b_prot_info prot_info;
1189 } __packed;
1190
1191 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1192
1193 struct pn533_target_type_b {
1194         struct pn533_type_b_sens_res sensb_res;
1195         u8 attrib_res_len;
1196         u8 attrib_res[];
1197 } __packed;
1198
1199 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1200                                                         int target_data_len)
1201 {
1202         if (target_data_len < sizeof(struct pn533_target_type_b))
1203                 return false;
1204
1205         if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1206                 return false;
1207
1208         if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1209                                                 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1210                 return false;
1211
1212         return true;
1213 }
1214
1215 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1216                                                         int tgt_data_len)
1217 {
1218         struct pn533_target_type_b *tgt_type_b;
1219
1220         tgt_type_b = (struct pn533_target_type_b *)tgt_data;
1221
1222         if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1223                 return -EPROTO;
1224
1225         nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1226
1227         return 0;
1228 }
1229
1230 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1231                               int tgdata_len)
1232 {
1233         struct nfc_target nfc_tgt;
1234         int rc;
1235
1236         nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
1237                     dev->poll_mod_curr);
1238
1239         if (tg != 1)
1240                 return -EPROTO;
1241
1242         memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1243
1244         switch (dev->poll_mod_curr) {
1245         case PN533_POLL_MOD_106KBPS_A:
1246                 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
1247                 break;
1248         case PN533_POLL_MOD_212KBPS_FELICA:
1249         case PN533_POLL_MOD_424KBPS_FELICA:
1250                 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
1251                 break;
1252         case PN533_POLL_MOD_106KBPS_JEWEL:
1253                 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
1254                 break;
1255         case PN533_POLL_MOD_847KBPS_B:
1256                 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
1257                 break;
1258         default:
1259                 nfc_dev_err(&dev->interface->dev,
1260                             "Unknown current poll modulation");
1261                 return -EPROTO;
1262         }
1263
1264         if (rc)
1265                 return rc;
1266
1267         if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1268                 nfc_dev_dbg(&dev->interface->dev,
1269                             "The Tg found doesn't have the desired protocol");
1270                 return -EAGAIN;
1271         }
1272
1273         nfc_dev_dbg(&dev->interface->dev,
1274                     "Target found - supported protocols: 0x%x",
1275                     nfc_tgt.supported_protocols);
1276
1277         dev->tgt_available_prots = nfc_tgt.supported_protocols;
1278
1279         nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1280
1281         return 0;
1282 }
1283
1284 static inline void pn533_poll_next_mod(struct pn533 *dev)
1285 {
1286         dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1287 }
1288
1289 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1290 {
1291         dev->poll_mod_count = 0;
1292 }
1293
1294 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1295 {
1296         dev->poll_mod_active[dev->poll_mod_count] =
1297                 (struct pn533_poll_modulations *)&poll_mod[mod_index];
1298         dev->poll_mod_count++;
1299 }
1300
1301 static void pn533_poll_create_mod_list(struct pn533 *dev,
1302                                        u32 im_protocols, u32 tm_protocols)
1303 {
1304         pn533_poll_reset_mod_list(dev);
1305
1306         if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1307             (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1308             (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1309                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1310
1311         if (im_protocols & NFC_PROTO_FELICA_MASK ||
1312             im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1313                 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1314                 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1315         }
1316
1317         if (im_protocols & NFC_PROTO_JEWEL_MASK)
1318                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1319
1320         if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1321                 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1322
1323         if (tm_protocols)
1324                 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1325 }
1326
1327 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
1328 {
1329         u8 nbtg, tg, *tgdata;
1330         int rc, tgdata_len;
1331
1332         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1333
1334         nbtg = resp->data[0];
1335         tg = resp->data[1];
1336         tgdata = &resp->data[2];
1337         tgdata_len = resp->len - 2;  /* nbtg + tg */
1338
1339         if (nbtg) {
1340                 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1341
1342                 /* We must stop the poll after a valid target found */
1343                 if (rc == 0) {
1344                         pn533_poll_reset_mod_list(dev);
1345                         return 0;
1346                 }
1347         }
1348
1349         return -EAGAIN;
1350 }
1351
1352 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1353 {
1354         struct sk_buff *skb;
1355         u8 *felica, *nfcid3, *gb;
1356
1357         u8 *gbytes = dev->gb;
1358         size_t gbytes_len = dev->gb_len;
1359
1360         u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1361                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1362                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1363                                 0xff, 0xff}; /* System code */
1364
1365         u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1366                                0x0, 0x0, 0x0,
1367                                0x40}; /* SEL_RES for DEP */
1368
1369         unsigned int skb_len = 36 + /* mode (1), mifare (6),
1370                                        felica (18), nfcid3 (10), gb_len (1) */
1371                                gbytes_len +
1372                                1;  /* len Tk*/
1373
1374         skb = pn533_alloc_skb(dev, skb_len);
1375         if (!skb)
1376                 return NULL;
1377
1378         /* DEP support only */
1379         *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
1380
1381         /* MIFARE params */
1382         memcpy(skb_put(skb, 6), mifare_params, 6);
1383
1384         /* Felica params */
1385         felica = skb_put(skb, 18);
1386         memcpy(felica, felica_params, 18);
1387         get_random_bytes(felica + 2, 6);
1388
1389         /* NFCID3 */
1390         nfcid3 = skb_put(skb, 10);
1391         memset(nfcid3, 0, 10);
1392         memcpy(nfcid3, felica, 8);
1393
1394         /* General bytes */
1395         *skb_put(skb, 1) = gbytes_len;
1396
1397         gb = skb_put(skb, gbytes_len);
1398         memcpy(gb, gbytes, gbytes_len);
1399
1400         /* Len Tk */
1401         *skb_put(skb, 1) = 0;
1402
1403         return skb;
1404 }
1405
1406 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
1407 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1408 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1409                                       struct sk_buff *resp)
1410 {
1411         u8 status;
1412
1413         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1414
1415         if (IS_ERR(resp))
1416                 return PTR_ERR(resp);
1417
1418         status = resp->data[0];
1419         skb_pull(resp, sizeof(status));
1420
1421         if (status != 0) {
1422                 nfc_tm_deactivated(dev->nfc_dev);
1423                 dev->tgt_mode = 0;
1424                 dev_kfree_skb(resp);
1425                 return 0;
1426         }
1427
1428         return nfc_tm_data_received(dev->nfc_dev, resp);
1429 }
1430
1431 static void pn533_wq_tg_get_data(struct work_struct *work)
1432 {
1433         struct pn533 *dev = container_of(work, struct pn533, tg_work);
1434
1435         struct sk_buff *skb;
1436         int rc;
1437
1438         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1439
1440         skb = pn533_alloc_skb(dev, 0);
1441         if (!skb)
1442                 return;
1443
1444         rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1445                                    pn533_tm_get_data_complete, NULL);
1446
1447         if (rc < 0)
1448                 dev_kfree_skb(skb);
1449
1450         return;
1451 }
1452
1453 #define ATR_REQ_GB_OFFSET 17
1454 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1455 {
1456         u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1457         size_t gb_len;
1458         int rc;
1459
1460         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1461
1462         if (resp->len < ATR_REQ_GB_OFFSET + 1)
1463                 return -EINVAL;
1464
1465         mode = resp->data[0];
1466         cmd = &resp->data[1];
1467
1468         nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1469                     mode, resp->len);
1470
1471         if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1472             PN533_INIT_TARGET_RESP_ACTIVE)
1473                 comm_mode = NFC_COMM_ACTIVE;
1474
1475         if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0)  /* Only DEP supported */
1476                 return -EOPNOTSUPP;
1477
1478         gb = cmd + ATR_REQ_GB_OFFSET;
1479         gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1480
1481         rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1482                               comm_mode, gb, gb_len);
1483         if (rc < 0) {
1484                 nfc_dev_err(&dev->interface->dev,
1485                             "Error when signaling target activation");
1486                 return rc;
1487         }
1488
1489         dev->tgt_mode = 1;
1490         queue_work(dev->wq, &dev->tg_work);
1491
1492         return 0;
1493 }
1494
1495 static void pn533_listen_mode_timer(unsigned long data)
1496 {
1497         struct pn533 *dev = (struct pn533 *)data;
1498
1499         nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1500
1501         /* An ack will cancel the last issued command (poll) */
1502         pn533_send_ack(dev, GFP_ATOMIC);
1503
1504         dev->cancel_listen = 1;
1505
1506         pn533_poll_next_mod(dev);
1507
1508         queue_work(dev->wq, &dev->poll_work);
1509 }
1510
1511 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1512                                struct sk_buff *resp)
1513 {
1514         struct pn533_poll_modulations *cur_mod;
1515         int rc;
1516
1517         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1518
1519         if (IS_ERR(resp)) {
1520                 rc = PTR_ERR(resp);
1521
1522                 nfc_dev_err(&dev->interface->dev, "%s  Poll complete error %d",
1523                             __func__, rc);
1524
1525                 if (rc == -ENOENT) {
1526                         if (dev->poll_mod_count != 0)
1527                                 return rc;
1528                         else
1529                                 goto stop_poll;
1530                 } else if (rc < 0) {
1531                         nfc_dev_err(&dev->interface->dev,
1532                                     "Error %d when running poll", rc);
1533                         goto stop_poll;
1534                 }
1535         }
1536
1537         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1538
1539         if (cur_mod->len == 0) { /* Target mode */
1540                 del_timer(&dev->listen_timer);
1541                 rc = pn533_init_target_complete(dev, resp);
1542                 goto done;
1543         }
1544
1545         /* Initiator mode */
1546         rc = pn533_start_poll_complete(dev, resp);
1547         if (!rc)
1548                 goto done;
1549
1550         if (!dev->poll_mod_count) {
1551                 nfc_dev_dbg(&dev->interface->dev, "Polling has been stoped.");
1552                 goto done;
1553         }
1554
1555         pn533_poll_next_mod(dev);
1556         queue_work(dev->wq, &dev->poll_work);
1557
1558 done:
1559         dev_kfree_skb(resp);
1560         return rc;
1561
1562 stop_poll:
1563         nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1564
1565         pn533_poll_reset_mod_list(dev);
1566         dev->poll_protocols = 0;
1567         return rc;
1568 }
1569
1570 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1571                                         struct pn533_poll_modulations *mod)
1572 {
1573         struct sk_buff *skb;
1574
1575         skb = pn533_alloc_skb(dev, mod->len);
1576         if (!skb)
1577                 return NULL;
1578
1579         memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
1580
1581         return skb;
1582 }
1583
1584 static int pn533_send_poll_frame(struct pn533 *dev)
1585 {
1586         struct pn533_poll_modulations *mod;
1587         struct sk_buff *skb;
1588         int rc;
1589         u8 cmd_code;
1590
1591         mod = dev->poll_mod_active[dev->poll_mod_curr];
1592
1593         nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1594                     __func__, mod->len);
1595
1596         if (mod->len == 0) {  /* Listen mode */
1597                 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1598                 skb = pn533_alloc_poll_tg_frame(dev);
1599         } else {  /* Polling mode */
1600                 cmd_code =  PN533_CMD_IN_LIST_PASSIVE_TARGET;
1601                 skb = pn533_alloc_poll_in_frame(dev, mod);
1602         }
1603
1604         if (!skb) {
1605                 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1606                 return -ENOMEM;
1607         }
1608
1609         rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1610                                   NULL);
1611         if (rc < 0) {
1612                 dev_kfree_skb(skb);
1613                 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
1614         }
1615
1616         return rc;
1617 }
1618
1619 static void pn533_wq_poll(struct work_struct *work)
1620 {
1621         struct pn533 *dev = container_of(work, struct pn533, poll_work);
1622         struct pn533_poll_modulations *cur_mod;
1623         int rc;
1624
1625         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1626
1627         nfc_dev_dbg(&dev->interface->dev,
1628                     "%s cancel_listen %d modulation len %d",
1629                     __func__, dev->cancel_listen, cur_mod->len);
1630
1631         if (dev->cancel_listen == 1) {
1632                 dev->cancel_listen = 0;
1633                 usb_kill_urb(dev->in_urb);
1634         }
1635
1636         rc = pn533_send_poll_frame(dev);
1637         if (rc)
1638                 return;
1639
1640         if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1641                 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1642
1643         return;
1644 }
1645
1646 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1647                             u32 im_protocols, u32 tm_protocols)
1648 {
1649         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1650
1651         nfc_dev_dbg(&dev->interface->dev,
1652                     "%s: im protocols 0x%x tm protocols 0x%x",
1653                     __func__, im_protocols, tm_protocols);
1654
1655         if (dev->tgt_active_prot) {
1656                 nfc_dev_err(&dev->interface->dev,
1657                             "Cannot poll with a target already activated");
1658                 return -EBUSY;
1659         }
1660
1661         if (dev->tgt_mode) {
1662                 nfc_dev_err(&dev->interface->dev,
1663                             "Cannot poll while already being activated");
1664                 return -EBUSY;
1665         }
1666
1667         if (tm_protocols) {
1668                 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1669                 if (dev->gb == NULL)
1670                         tm_protocols = 0;
1671         }
1672
1673         dev->poll_mod_curr = 0;
1674         pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1675         dev->poll_protocols = im_protocols;
1676         dev->listen_protocols = tm_protocols;
1677
1678         return pn533_send_poll_frame(dev);
1679 }
1680
1681 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1682 {
1683         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1684
1685         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1686
1687         del_timer(&dev->listen_timer);
1688
1689         if (!dev->poll_mod_count) {
1690                 nfc_dev_dbg(&dev->interface->dev,
1691                             "Polling operation was not running");
1692                 return;
1693         }
1694
1695         /* An ack will cancel the last issued command (poll) */
1696         pn533_send_ack(dev, GFP_KERNEL);
1697
1698         /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1699         usb_kill_urb(dev->in_urb);
1700
1701         pn533_poll_reset_mod_list(dev);
1702 }
1703
1704 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1705 {
1706         struct pn533_cmd_activate_response *rsp;
1707         u16 gt_len;
1708         int rc;
1709
1710         struct sk_buff *skb;
1711         struct sk_buff *resp;
1712
1713         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1714
1715         skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1716         if (!skb)
1717                 return -ENOMEM;
1718
1719         *skb_put(skb, sizeof(u8)) = 1; /* TG */
1720         *skb_put(skb, sizeof(u8)) = 0; /* Next */
1721
1722         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1723         if (IS_ERR(resp))
1724                 return PTR_ERR(resp);
1725
1726         rsp = (struct pn533_cmd_activate_response *)resp->data;
1727         rc = rsp->status & PN533_CMD_RET_MASK;
1728         if (rc != PN533_CMD_RET_SUCCESS) {
1729                 nfc_dev_err(&dev->interface->dev,
1730                             "Target activation failed (error 0x%x)", rc);
1731                 dev_kfree_skb(resp);
1732                 return -EIO;
1733         }
1734
1735         /* ATR_RES general bytes are located at offset 16 */
1736         gt_len = resp->len - 16;
1737         rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1738
1739         dev_kfree_skb(resp);
1740         return rc;
1741 }
1742
1743 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1744                                  struct nfc_target *target, u32 protocol)
1745 {
1746         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1747         int rc;
1748
1749         nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1750                     protocol);
1751
1752         if (dev->poll_mod_count) {
1753                 nfc_dev_err(&dev->interface->dev,
1754                             "Cannot activate while polling");
1755                 return -EBUSY;
1756         }
1757
1758         if (dev->tgt_active_prot) {
1759                 nfc_dev_err(&dev->interface->dev,
1760                             "There is already an active target");
1761                 return -EBUSY;
1762         }
1763
1764         if (!dev->tgt_available_prots) {
1765                 nfc_dev_err(&dev->interface->dev,
1766                             "There is no available target to activate");
1767                 return -EINVAL;
1768         }
1769
1770         if (!(dev->tgt_available_prots & (1 << protocol))) {
1771                 nfc_dev_err(&dev->interface->dev,
1772                             "Target doesn't support requested proto %u",
1773                             protocol);
1774                 return -EINVAL;
1775         }
1776
1777         if (protocol == NFC_PROTO_NFC_DEP) {
1778                 rc = pn533_activate_target_nfcdep(dev);
1779                 if (rc) {
1780                         nfc_dev_err(&dev->interface->dev,
1781                                     "Activating target with DEP failed %d", rc);
1782                         return rc;
1783                 }
1784         }
1785
1786         dev->tgt_active_prot = protocol;
1787         dev->tgt_available_prots = 0;
1788
1789         return 0;
1790 }
1791
1792 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1793                                     struct nfc_target *target)
1794 {
1795         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1796
1797         struct sk_buff *skb;
1798         struct sk_buff *resp;
1799
1800         int rc;
1801
1802         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1803
1804         if (!dev->tgt_active_prot) {
1805                 nfc_dev_err(&dev->interface->dev, "There is no active target");
1806                 return;
1807         }
1808
1809         dev->tgt_active_prot = 0;
1810         skb_queue_purge(&dev->resp_q);
1811
1812         skb = pn533_alloc_skb(dev, sizeof(u8));
1813         if (!skb)
1814                 return;
1815
1816         *skb_put(skb, 1) = 1; /* TG*/
1817
1818         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1819         if (IS_ERR(resp))
1820                 return;
1821
1822         rc = resp->data[0] & PN533_CMD_RET_MASK;
1823         if (rc != PN533_CMD_RET_SUCCESS)
1824                 nfc_dev_err(&dev->interface->dev,
1825                             "Error 0x%x when releasing the target", rc);
1826
1827         dev_kfree_skb(resp);
1828         return;
1829 }
1830
1831
1832 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1833                                          struct sk_buff *resp)
1834 {
1835         struct pn533_cmd_jump_dep_response *rsp;
1836         u8 target_gt_len;
1837         int rc;
1838         u8 active = *(u8 *)arg;
1839
1840         kfree(arg);
1841
1842         if (IS_ERR(resp))
1843                 return PTR_ERR(resp);
1844
1845         if (dev->tgt_available_prots &&
1846             !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1847                 nfc_dev_err(&dev->interface->dev,
1848                             "The target does not support DEP");
1849                 rc =  -EINVAL;
1850                 goto error;
1851         }
1852
1853         rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1854
1855         rc = rsp->status & PN533_CMD_RET_MASK;
1856         if (rc != PN533_CMD_RET_SUCCESS) {
1857                 nfc_dev_err(&dev->interface->dev,
1858                             "Bringing DEP link up failed (error 0x%x)", rc);
1859                 goto error;
1860         }
1861
1862         if (!dev->tgt_available_prots) {
1863                 struct nfc_target nfc_target;
1864
1865                 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1866
1867                 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1868                 nfc_target.nfcid1_len = 10;
1869                 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1870                 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1871                 if (rc)
1872                         goto error;
1873
1874                 dev->tgt_available_prots = 0;
1875         }
1876
1877         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1878
1879         /* ATR_RES general bytes are located at offset 17 */
1880         target_gt_len = resp->len - 17;
1881         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1882                                           rsp->gt, target_gt_len);
1883         if (rc == 0)
1884                 rc = nfc_dep_link_is_up(dev->nfc_dev,
1885                                         dev->nfc_dev->targets[0].idx,
1886                                         !active, NFC_RF_INITIATOR);
1887
1888 error:
1889         dev_kfree_skb(resp);
1890         return rc;
1891 }
1892
1893 static int pn533_mod_to_baud(struct pn533 *dev)
1894 {
1895         switch (dev->poll_mod_curr) {
1896         case PN533_POLL_MOD_106KBPS_A:
1897                 return 0;
1898         case PN533_POLL_MOD_212KBPS_FELICA:
1899                 return 1;
1900         case PN533_POLL_MOD_424KBPS_FELICA:
1901                 return 2;
1902         default:
1903                 return -EINVAL;
1904         }
1905 }
1906
1907 #define PASSIVE_DATA_LEN 5
1908 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1909                              u8 comm_mode, u8 *gb, size_t gb_len)
1910 {
1911         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1912         struct sk_buff *skb;
1913         int rc, baud, skb_len;
1914         u8 *next, *arg;
1915
1916         u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1917
1918         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1919
1920         if (dev->poll_mod_count) {
1921                 nfc_dev_err(&dev->interface->dev,
1922                             "Cannot bring the DEP link up while polling");
1923                 return -EBUSY;
1924         }
1925
1926         if (dev->tgt_active_prot) {
1927                 nfc_dev_err(&dev->interface->dev,
1928                             "There is already an active target");
1929                 return -EBUSY;
1930         }
1931
1932         baud = pn533_mod_to_baud(dev);
1933         if (baud < 0) {
1934                 nfc_dev_err(&dev->interface->dev,
1935                             "Invalid curr modulation %d", dev->poll_mod_curr);
1936                 return baud;
1937         }
1938
1939         skb_len = 3 + gb_len; /* ActPass + BR + Next */
1940         if (comm_mode == NFC_COMM_PASSIVE)
1941                 skb_len += PASSIVE_DATA_LEN;
1942
1943         skb = pn533_alloc_skb(dev, skb_len);
1944         if (!skb)
1945                 return -ENOMEM;
1946
1947         *skb_put(skb, 1) = !comm_mode;  /* ActPass */
1948         *skb_put(skb, 1) = baud;  /* Baud rate */
1949
1950         next = skb_put(skb, 1);  /* Next */
1951         *next = 0;
1952
1953         if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
1954                 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
1955                        PASSIVE_DATA_LEN);
1956                 *next |= 1;
1957         }
1958
1959         if (gb != NULL && gb_len > 0) {
1960                 memcpy(skb_put(skb, gb_len), gb, gb_len);
1961                 *next |= 4; /* We have some Gi */
1962         } else {
1963                 *next = 0;
1964         }
1965
1966         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
1967         if (!arg) {
1968                 dev_kfree_skb(skb);
1969                 return -ENOMEM;
1970         }
1971
1972         *arg = !comm_mode;
1973
1974         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1975                                   pn533_in_dep_link_up_complete, arg);
1976
1977         if (rc < 0) {
1978                 dev_kfree_skb(skb);
1979                 kfree(arg);
1980         }
1981
1982         return rc;
1983 }
1984
1985 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1986 {
1987         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1988
1989         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1990
1991         pn533_poll_reset_mod_list(dev);
1992
1993         if (dev->tgt_mode || dev->tgt_active_prot) {
1994                 pn533_send_ack(dev, GFP_KERNEL);
1995                 usb_kill_urb(dev->in_urb);
1996         }
1997
1998         dev->tgt_active_prot = 0;
1999         dev->tgt_mode = 0;
2000
2001         skb_queue_purge(&dev->resp_q);
2002
2003         return 0;
2004 }
2005
2006 struct pn533_data_exchange_arg {
2007         data_exchange_cb_t cb;
2008         void *cb_context;
2009 };
2010
2011 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2012 {
2013         struct sk_buff *skb, *tmp, *t;
2014         unsigned int skb_len = 0, tmp_len = 0;
2015
2016         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2017
2018         if (skb_queue_empty(&dev->resp_q))
2019                 return NULL;
2020
2021         if (skb_queue_len(&dev->resp_q) == 1) {
2022                 skb = skb_dequeue(&dev->resp_q);
2023                 goto out;
2024         }
2025
2026         skb_queue_walk_safe(&dev->resp_q, tmp, t)
2027                 skb_len += tmp->len;
2028
2029         nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2030                     __func__, skb_len);
2031
2032         skb = alloc_skb(skb_len, GFP_KERNEL);
2033         if (skb == NULL)
2034                 goto out;
2035
2036         skb_put(skb, skb_len);
2037
2038         skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2039                 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2040                 tmp_len += tmp->len;
2041         }
2042
2043 out:
2044         skb_queue_purge(&dev->resp_q);
2045
2046         return skb;
2047 }
2048
2049 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2050                                         struct sk_buff *resp)
2051 {
2052         struct pn533_data_exchange_arg *arg = _arg;
2053         struct sk_buff *skb;
2054         int rc = 0;
2055         u8 status, ret, mi;
2056
2057         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2058
2059         if (IS_ERR(resp)) {
2060                 rc = PTR_ERR(resp);
2061                 goto _error;
2062         }
2063
2064         status = resp->data[0];
2065         ret = status & PN533_CMD_RET_MASK;
2066         mi = status & PN533_CMD_MI_MASK;
2067
2068         skb_pull(resp, sizeof(status));
2069
2070         if (ret != PN533_CMD_RET_SUCCESS) {
2071                 nfc_dev_err(&dev->interface->dev,
2072                             "Exchanging data failed (error 0x%x)", ret);
2073                 rc = -EIO;
2074                 goto error;
2075         }
2076
2077         skb_queue_tail(&dev->resp_q, resp);
2078
2079         if (mi) {
2080                 dev->cmd_complete_mi_arg = arg;
2081                 queue_work(dev->wq, &dev->mi_work);
2082                 return -EINPROGRESS;
2083         }
2084
2085         skb = pn533_build_response(dev);
2086         if (!skb)
2087                 goto error;
2088
2089         arg->cb(arg->cb_context, skb, 0);
2090         kfree(arg);
2091         return 0;
2092
2093 error:
2094         dev_kfree_skb(resp);
2095 _error:
2096         skb_queue_purge(&dev->resp_q);
2097         arg->cb(arg->cb_context, NULL, rc);
2098         kfree(arg);
2099         return rc;
2100 }
2101
2102 static int pn533_transceive(struct nfc_dev *nfc_dev,
2103                             struct nfc_target *target, struct sk_buff *skb,
2104                             data_exchange_cb_t cb, void *cb_context)
2105 {
2106         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2107         struct pn533_data_exchange_arg *arg = NULL;
2108         int rc;
2109
2110         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2111
2112         if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2113                 /* TODO: Implement support to multi-part data exchange */
2114                 nfc_dev_err(&dev->interface->dev,
2115                             "Data length greater than the max allowed: %d",
2116                             PN533_CMD_DATAEXCH_DATA_MAXLEN);
2117                 rc = -ENOSYS;
2118                 goto error;
2119         }
2120
2121         if (!dev->tgt_active_prot) {
2122                 nfc_dev_err(&dev->interface->dev,
2123                             "Can't exchange data if there is no active target");
2124                 rc = -EINVAL;
2125                 goto error;
2126         }
2127
2128         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2129         if (!arg) {
2130                 rc = -ENOMEM;
2131                 goto error;
2132         }
2133
2134         arg->cb = cb;
2135         arg->cb_context = cb_context;
2136
2137         switch (dev->device_type) {
2138         case PN533_DEVICE_PASORI:
2139                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2140                         rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2141                                                    skb,
2142                                                    pn533_data_exchange_complete,
2143                                                    arg);
2144
2145                         break;
2146                 }
2147         default:
2148                 *skb_push(skb, sizeof(u8)) =  1; /*TG*/
2149
2150                 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2151                                            skb, pn533_data_exchange_complete,
2152                                            arg);
2153
2154                 break;
2155         }
2156
2157         if (rc < 0) /* rc from send_async */
2158                 goto error;
2159
2160         return 0;
2161
2162 error:
2163         kfree(arg);
2164         dev_kfree_skb(skb);
2165         return rc;
2166 }
2167
2168 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2169                                   struct sk_buff *resp)
2170 {
2171         u8 status;
2172
2173         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2174
2175         if (IS_ERR(resp))
2176                 return PTR_ERR(resp);
2177
2178         status = resp->data[0];
2179
2180         dev_kfree_skb(resp);
2181
2182         if (status != 0) {
2183                 nfc_tm_deactivated(dev->nfc_dev);
2184
2185                 dev->tgt_mode = 0;
2186
2187                 return 0;
2188         }
2189
2190         queue_work(dev->wq, &dev->tg_work);
2191
2192         return 0;
2193 }
2194
2195 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2196 {
2197         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2198         int rc;
2199
2200         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2201
2202         if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2203                 nfc_dev_err(&dev->interface->dev,
2204                             "Data length greater than the max allowed: %d",
2205                             PN533_CMD_DATAEXCH_DATA_MAXLEN);
2206                 return -ENOSYS;
2207         }
2208
2209         rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2210                                    pn533_tm_send_complete, NULL);
2211         if (rc < 0)
2212                 dev_kfree_skb(skb);
2213
2214         return rc;
2215 }
2216
2217 static void pn533_wq_mi_recv(struct work_struct *work)
2218 {
2219         struct pn533 *dev = container_of(work, struct pn533, mi_work);
2220
2221         struct sk_buff *skb;
2222         int rc;
2223
2224         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2225
2226         skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2227         if (!skb)
2228                 goto error;
2229
2230         switch (dev->device_type) {
2231         case PN533_DEVICE_PASORI:
2232                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2233                         rc = pn533_send_cmd_direct_async(dev,
2234                                                 PN533_CMD_IN_COMM_THRU,
2235                                                 skb,
2236                                                 pn533_data_exchange_complete,
2237                                                  dev->cmd_complete_mi_arg);
2238
2239                         break;
2240                 }
2241         default:
2242                 *skb_put(skb, sizeof(u8)) =  1; /*TG*/
2243
2244                 rc = pn533_send_cmd_direct_async(dev,
2245                                                  PN533_CMD_IN_DATA_EXCHANGE,
2246                                                  skb,
2247                                                  pn533_data_exchange_complete,
2248                                                  dev->cmd_complete_mi_arg);
2249
2250                 break;
2251         }
2252
2253         if (rc == 0) /* success */
2254                 return;
2255
2256         nfc_dev_err(&dev->interface->dev,
2257                     "Error %d when trying to perform data_exchange", rc);
2258
2259         dev_kfree_skb(skb);
2260         kfree(dev->cmd_complete_arg);
2261
2262 error:
2263         pn533_send_ack(dev, GFP_KERNEL);
2264         queue_work(dev->wq, &dev->cmd_work);
2265 }
2266
2267 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2268                                                                 u8 cfgdata_len)
2269 {
2270         struct sk_buff *skb;
2271         struct sk_buff *resp;
2272
2273         int skb_len;
2274
2275         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2276
2277         skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2278
2279         skb = pn533_alloc_skb(dev, skb_len);
2280         if (!skb)
2281                 return -ENOMEM;
2282
2283         *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2284         memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
2285
2286         resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2287         if (IS_ERR(resp))
2288                 return PTR_ERR(resp);
2289
2290         dev_kfree_skb(resp);
2291         return 0;
2292 }
2293
2294 static int pn533_get_firmware_version(struct pn533 *dev,
2295                                       struct pn533_fw_version *fv)
2296 {
2297         struct sk_buff *skb;
2298         struct sk_buff *resp;
2299
2300         skb = pn533_alloc_skb(dev, 0);
2301         if (!skb)
2302                 return -ENOMEM;
2303
2304         resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2305         if (IS_ERR(resp))
2306                 return PTR_ERR(resp);
2307
2308         fv->ic = resp->data[0];
2309         fv->ver = resp->data[1];
2310         fv->rev = resp->data[2];
2311         fv->support = resp->data[3];
2312
2313         dev_kfree_skb(resp);
2314         return 0;
2315 }
2316
2317 static int pn533_fw_reset(struct pn533 *dev)
2318 {
2319         struct sk_buff *skb;
2320         struct sk_buff *resp;
2321
2322         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2323
2324         skb = pn533_alloc_skb(dev, sizeof(u8));
2325         if (!skb)
2326                 return -ENOMEM;
2327
2328         *skb_put(skb, sizeof(u8)) = 0x1;
2329
2330         resp = pn533_send_cmd_sync(dev, 0x18, skb);
2331         if (IS_ERR(resp))
2332                 return PTR_ERR(resp);
2333
2334         dev_kfree_skb(resp);
2335
2336         return 0;
2337 }
2338
2339 static struct nfc_ops pn533_nfc_ops = {
2340         .dev_up = NULL,
2341         .dev_down = NULL,
2342         .dep_link_up = pn533_dep_link_up,
2343         .dep_link_down = pn533_dep_link_down,
2344         .start_poll = pn533_start_poll,
2345         .stop_poll = pn533_stop_poll,
2346         .activate_target = pn533_activate_target,
2347         .deactivate_target = pn533_deactivate_target,
2348         .im_transceive = pn533_transceive,
2349         .tm_send = pn533_tm_send,
2350 };
2351
2352 static int pn533_setup(struct pn533 *dev)
2353 {
2354         struct pn533_config_max_retries max_retries;
2355         struct pn533_config_timing timing;
2356         u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2357         int rc;
2358
2359         switch (dev->device_type) {
2360         case PN533_DEVICE_STD:
2361                 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2362                 max_retries.mx_rty_psl = 2;
2363                 max_retries.mx_rty_passive_act =
2364                         PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2365
2366                 timing.rfu = PN533_CONFIG_TIMING_102;
2367                 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2368                 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2369
2370                 break;
2371
2372         case PN533_DEVICE_PASORI:
2373                 max_retries.mx_rty_atr = 0x2;
2374                 max_retries.mx_rty_psl = 0x1;
2375                 max_retries.mx_rty_passive_act =
2376                         PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2377
2378                 timing.rfu = PN533_CONFIG_TIMING_102;
2379                 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2380                 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2381
2382                 break;
2383
2384         default:
2385                 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2386                             dev->device_type);
2387                 return -EINVAL;
2388         }
2389
2390         rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2391                                      (u8 *)&max_retries, sizeof(max_retries));
2392         if (rc) {
2393                 nfc_dev_err(&dev->interface->dev,
2394                             "Error on setting MAX_RETRIES config");
2395                 return rc;
2396         }
2397
2398
2399         rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2400                                      (u8 *)&timing, sizeof(timing));
2401         if (rc) {
2402                 nfc_dev_err(&dev->interface->dev,
2403                             "Error on setting RF timings");
2404                 return rc;
2405         }
2406
2407         switch (dev->device_type) {
2408         case PN533_DEVICE_STD:
2409                 break;
2410
2411         case PN533_DEVICE_PASORI:
2412                 pn533_fw_reset(dev);
2413
2414                 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2415                                              pasori_cfg, 3);
2416                 if (rc) {
2417                         nfc_dev_err(&dev->interface->dev,
2418                                     "Error while settings PASORI config");
2419                         return rc;
2420                 }
2421
2422                 pn533_fw_reset(dev);
2423
2424                 break;
2425         }
2426
2427         return 0;
2428 }
2429
2430 static int pn533_probe(struct usb_interface *interface,
2431                         const struct usb_device_id *id)
2432 {
2433         struct pn533_fw_version fw_ver;
2434         struct pn533 *dev;
2435         struct usb_host_interface *iface_desc;
2436         struct usb_endpoint_descriptor *endpoint;
2437         int in_endpoint = 0;
2438         int out_endpoint = 0;
2439         int rc = -ENOMEM;
2440         int i;
2441         u32 protocols;
2442
2443         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2444         if (!dev)
2445                 return -ENOMEM;
2446
2447         dev->udev = usb_get_dev(interface_to_usbdev(interface));
2448         dev->interface = interface;
2449         mutex_init(&dev->cmd_lock);
2450
2451         iface_desc = interface->cur_altsetting;
2452         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2453                 endpoint = &iface_desc->endpoint[i].desc;
2454
2455                 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
2456                         in_endpoint = endpoint->bEndpointAddress;
2457
2458                 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
2459                         out_endpoint = endpoint->bEndpointAddress;
2460         }
2461
2462         if (!in_endpoint || !out_endpoint) {
2463                 nfc_dev_err(&interface->dev,
2464                             "Could not find bulk-in or bulk-out endpoint");
2465                 rc = -ENODEV;
2466                 goto error;
2467         }
2468
2469         dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
2470         dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2471
2472         if (!dev->in_urb || !dev->out_urb)
2473                 goto error;
2474
2475         usb_fill_bulk_urb(dev->in_urb, dev->udev,
2476                           usb_rcvbulkpipe(dev->udev, in_endpoint),
2477                           NULL, 0, NULL, dev);
2478         usb_fill_bulk_urb(dev->out_urb, dev->udev,
2479                           usb_sndbulkpipe(dev->udev, out_endpoint),
2480                           NULL, 0, pn533_send_complete, dev);
2481
2482         INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2483         INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
2484         INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
2485         INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
2486         INIT_WORK(&dev->poll_work, pn533_wq_poll);
2487         dev->wq = alloc_ordered_workqueue("pn533", 0);
2488         if (dev->wq == NULL)
2489                 goto error;
2490
2491         init_timer(&dev->listen_timer);
2492         dev->listen_timer.data = (unsigned long) dev;
2493         dev->listen_timer.function = pn533_listen_mode_timer;
2494
2495         skb_queue_head_init(&dev->resp_q);
2496
2497         INIT_LIST_HEAD(&dev->cmd_queue);
2498
2499         usb_set_intfdata(interface, dev);
2500
2501         dev->ops = &pn533_std_frame_ops;
2502
2503         dev->device_type = id->driver_info;
2504         switch (dev->device_type) {
2505         case PN533_DEVICE_STD:
2506                 protocols = PN533_ALL_PROTOCOLS;
2507                 break;
2508
2509         case PN533_DEVICE_PASORI:
2510                 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2511                 break;
2512
2513         default:
2514                 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2515                             dev->device_type);
2516                 rc = -EINVAL;
2517                 goto destroy_wq;
2518         }
2519
2520         memset(&fw_ver, 0, sizeof(fw_ver));
2521         rc = pn533_get_firmware_version(dev, &fw_ver);
2522         if (rc < 0)
2523                 goto destroy_wq;
2524
2525         nfc_dev_info(&dev->interface->dev,
2526                      "NXP PN533 firmware ver %d.%d now attached",
2527                      fw_ver.ver, fw_ver.rev);
2528
2529
2530         dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2531                                            NFC_SE_NONE,
2532                                            dev->ops->tx_header_len +
2533                                            PN533_CMD_DATAEXCH_HEAD_LEN,
2534                                            dev->ops->tx_tail_len);
2535         if (!dev->nfc_dev)
2536                 goto destroy_wq;
2537
2538         nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2539         nfc_set_drvdata(dev->nfc_dev, dev);
2540
2541         rc = nfc_register_device(dev->nfc_dev);
2542         if (rc)
2543                 goto free_nfc_dev;
2544
2545         rc = pn533_setup(dev);
2546         if (rc)
2547                 goto unregister_nfc_dev;
2548
2549         return 0;
2550
2551 unregister_nfc_dev:
2552         nfc_unregister_device(dev->nfc_dev);
2553
2554 free_nfc_dev:
2555         nfc_free_device(dev->nfc_dev);
2556
2557 destroy_wq:
2558         destroy_workqueue(dev->wq);
2559 error:
2560         usb_free_urb(dev->in_urb);
2561         usb_free_urb(dev->out_urb);
2562         kfree(dev);
2563         return rc;
2564 }
2565
2566 static void pn533_disconnect(struct usb_interface *interface)
2567 {
2568         struct pn533 *dev;
2569         struct pn533_cmd *cmd, *n;
2570
2571         dev = usb_get_intfdata(interface);
2572         usb_set_intfdata(interface, NULL);
2573
2574         nfc_unregister_device(dev->nfc_dev);
2575         nfc_free_device(dev->nfc_dev);
2576
2577         usb_kill_urb(dev->in_urb);
2578         usb_kill_urb(dev->out_urb);
2579
2580         destroy_workqueue(dev->wq);
2581
2582         skb_queue_purge(&dev->resp_q);
2583
2584         del_timer(&dev->listen_timer);
2585
2586         list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2587                 list_del(&cmd->queue);
2588                 kfree(cmd);
2589         }
2590
2591         usb_free_urb(dev->in_urb);
2592         usb_free_urb(dev->out_urb);
2593         kfree(dev);
2594
2595         nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
2596 }
2597
2598 static struct usb_driver pn533_driver = {
2599         .name =         "pn533",
2600         .probe =        pn533_probe,
2601         .disconnect =   pn533_disconnect,
2602         .id_table =     pn533_table,
2603 };
2604
2605 module_usb_driver(pn533_driver);
2606
2607 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2608 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2609 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2610 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2611 MODULE_VERSION(VERSION);
2612 MODULE_LICENSE("GPL");