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 #define SONY_VENDOR_ID         0x054c
  42 #define PASORI_PRODUCT_ID      0x02e1
  43
  44 #define PN533_DEVICE_STD    0x1
  45 #define PN533_DEVICE_PASORI 0x2
  46
  47 #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
  48                              NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
  49                              NFC_PROTO_NFC_DEP_MASK |\
  50                              NFC_PROTO_ISO14443_B_MASK)
  51
  52 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
  53                                    NFC_PROTO_MIFARE_MASK | \
  54                                    NFC_PROTO_FELICA_MASK | \
  55                                    NFC_PROTO_ISO14443_MASK | \
  56                                    NFC_PROTO_NFC_DEP_MASK)
  57
  58 static const struct usb_device_id pn533_table[] = {
  59         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  60           .idVendor             = PN533_VENDOR_ID,
  61           .idProduct            = PN533_PRODUCT_ID,
  62           .driver_info          = PN533_DEVICE_STD,
  63         },
  64         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  65           .idVendor             = SCM_VENDOR_ID,
  66           .idProduct            = SCL3711_PRODUCT_ID,
  67           .driver_info          = PN533_DEVICE_STD,
  68         },
  69         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  70           .idVendor             = SONY_VENDOR_ID,
  71           .idProduct            = PASORI_PRODUCT_ID,
  72           .driver_info          = PN533_DEVICE_PASORI,
  73         },
  74         { }
  75 };
  76 MODULE_DEVICE_TABLE(usb, pn533_table);
  77
  78 /* How much time we spend listening for initiators */
  79 #define PN533_LISTEN_TIME 2
  80
  81 /* frame definitions */
  82 #define PN533_NORMAL_FRAME_MAX_LEN 262  /* 6   (PREAMBLE, SOF, LEN, LCS, TFI)
  83                                            254 (DATA)
  84                                            2   (DCS, postamble) */
  85 #define PN533_FRAME_HEADER_LEN (sizeof(struct pn533_frame) \
  86                                         + 2) /* data[0] TFI, data[1] CC */
  87 #define PN533_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
  88
  89 /*
  90  * Max extended frame payload len, excluding TFI and CC
  91  * which are already in PN533_FRAME_HEADER_LEN.
  92  */
  93 #define PN533_FRAME_MAX_PAYLOAD_LEN 263
  94
  95 #define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \
  96                                 PN533_FRAME_TAIL_LEN)
  97 #define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1)
  98 #define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen])
  99 #define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
 100
 101 /* start of frame */
 102 #define PN533_SOF 0x00FF
 103
 104 /* frame identifier: in/out/error */
 105 #define PN533_FRAME_IDENTIFIER(f) (f->data[0])
 106 #define PN533_DIR_OUT 0xD4
 107 #define PN533_DIR_IN 0xD5
 108
 109 /* PN533 Commands */
 110 #define PN533_FRAME_CMD(f) (f->data[1])
 111 #define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2])
 112 #define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2)
 113
 114 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
 115 #define PN533_CMD_RF_CONFIGURATION 0x32
 116 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
 117 #define PN533_CMD_IN_COMM_THRU     0x42
 118 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
 119 #define PN533_CMD_IN_ATR 0x50
 120 #define PN533_CMD_IN_RELEASE 0x52
 121 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
 122
 123 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
 124 #define PN533_CMD_TG_GET_DATA 0x86
 125 #define PN533_CMD_TG_SET_DATA 0x8e
 126 #define PN533_CMD_UNDEF 0xff
 127
 128 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
 129
 130 /* PN533 Return codes */
 131 #define PN533_CMD_RET_MASK 0x3F
 132 #define PN533_CMD_MI_MASK 0x40
 133 #define PN533_CMD_RET_SUCCESS 0x00
 134
 135 struct pn533;
 136
 137 typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg,
 138                                         u8 *params, int params_len);
 139
 140 typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
 141                                         struct sk_buff *resp);
 142
 143 /* structs for pn533 commands */
 144
 145 /* PN533_CMD_GET_FIRMWARE_VERSION */
 146 struct pn533_fw_version {
 147         u8 ic;
 148         u8 ver;
 149         u8 rev;
 150         u8 support;
 151 };
 152
 153 /* PN533_CMD_RF_CONFIGURATION */
 154 #define PN533_CFGITEM_TIMING 0x02
 155 #define PN533_CFGITEM_MAX_RETRIES 0x05
 156 #define PN533_CFGITEM_PASORI 0x82
 157
 158 #define PN533_CONFIG_TIMING_102 0xb
 159 #define PN533_CONFIG_TIMING_204 0xc
 160 #define PN533_CONFIG_TIMING_409 0xd
 161 #define PN533_CONFIG_TIMING_819 0xe
 162
 163 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
 164 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
 165
 166 struct pn533_config_max_retries {
 167         u8 mx_rty_atr;
 168         u8 mx_rty_psl;
 169         u8 mx_rty_passive_act;
 170 } __packed;
 171
 172 struct pn533_config_timing {
 173         u8 rfu;
 174         u8 atr_res_timeout;
 175         u8 dep_timeout;
 176 } __packed;
 177
 178 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
 179
 180 /* felica commands opcode */
 181 #define PN533_FELICA_OPC_SENSF_REQ 0
 182 #define PN533_FELICA_OPC_SENSF_RES 1
 183 /* felica SENSF_REQ parameters */
 184 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
 185 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
 186 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
 187 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
 188
 189 /* type B initiator_data values */
 190 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
 191 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
 192 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
 193
 194 union pn533_cmd_poll_initdata {
 195         struct {
 196                 u8 afi;
 197                 u8 polling_method;
 198         } __packed type_b;
 199         struct {
 200                 u8 opcode;
 201                 __be16 sc;
 202                 u8 rc;
 203                 u8 tsn;
 204         } __packed felica;
 205 };
 206
 207 /* Poll modulations */
 208 enum {
 209         PN533_POLL_MOD_106KBPS_A,
 210         PN533_POLL_MOD_212KBPS_FELICA,
 211         PN533_POLL_MOD_424KBPS_FELICA,
 212         PN533_POLL_MOD_106KBPS_JEWEL,
 213         PN533_POLL_MOD_847KBPS_B,
 214         PN533_LISTEN_MOD,
 215
 216         __PN533_POLL_MOD_AFTER_LAST,
 217 };
 218 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
 219
 220 struct pn533_poll_modulations {
 221         struct {
 222                 u8 maxtg;
 223                 u8 brty;
 224                 union pn533_cmd_poll_initdata initiator_data;
 225         } __packed data;
 226         u8 len;
 227 };
 228
 229 const struct pn533_poll_modulations poll_mod[] = {
 230         [PN533_POLL_MOD_106KBPS_A] = {
 231                 .data = {
 232                         .maxtg = 1,
 233                         .brty = 0,
 234                 },
 235                 .len = 2,
 236         },
 237         [PN533_POLL_MOD_212KBPS_FELICA] = {
 238                 .data = {
 239                         .maxtg = 1,
 240                         .brty = 1,
 241                         .initiator_data.felica = {
 242                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 243                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 244                                 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
 245                                 .tsn = 0,
 246                         },
 247                 },
 248                 .len = 7,
 249         },
 250         [PN533_POLL_MOD_424KBPS_FELICA] = {
 251                 .data = {
 252                         .maxtg = 1,
 253                         .brty = 2,
 254                         .initiator_data.felica = {
 255                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 256                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 257                                 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
 258                                 .tsn = 0,
 259                         },
 260                  },
 261                 .len = 7,
 262         },
 263         [PN533_POLL_MOD_106KBPS_JEWEL] = {
 264                 .data = {
 265                         .maxtg = 1,
 266                         .brty = 4,
 267                 },
 268                 .len = 2,
 269         },
 270         [PN533_POLL_MOD_847KBPS_B] = {
 271                 .data = {
 272                         .maxtg = 1,
 273                         .brty = 8,
 274                         .initiator_data.type_b = {
 275                                 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
 276                                 .polling_method =
 277                                         PN533_TYPE_B_POLL_METHOD_TIMESLOT,
 278                         },
 279                 },
 280                 .len = 3,
 281         },
 282         [PN533_LISTEN_MOD] = {
 283                 .len = 0,
 284         },
 285 };
 286
 287 /* PN533_CMD_IN_ATR */
 288
 289 struct pn533_cmd_activate_response {
 290         u8 status;
 291         u8 nfcid3t[10];
 292         u8 didt;
 293         u8 bst;
 294         u8 brt;
 295         u8 to;
 296         u8 ppt;
 297         /* optional */
 298         u8 gt[];
 299 } __packed;
 300
 301 struct pn533_cmd_jump_dep_response {
 302         u8 status;
 303         u8 tg;
 304         u8 nfcid3t[10];
 305         u8 didt;
 306         u8 bst;
 307         u8 brt;
 308         u8 to;
 309         u8 ppt;
 310         /* optional */
 311         u8 gt[];
 312 } __packed;
 313
 314
 315 /* PN533_TG_INIT_AS_TARGET */
 316 #define PN533_INIT_TARGET_PASSIVE 0x1
 317 #define PN533_INIT_TARGET_DEP 0x2
 318
 319 #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
 320 #define PN533_INIT_TARGET_RESP_ACTIVE     0x1
 321 #define PN533_INIT_TARGET_RESP_DEP        0x4
 322
 323 struct pn533 {
 324         struct usb_device *udev;
 325         struct usb_interface *interface;
 326         struct nfc_dev *nfc_dev;
 327
 328         struct urb *out_urb;
 329         struct pn533_frame *out_frame;
 330
 331         struct urb *in_urb;
 332         struct pn533_frame *in_frame;
 333
 334         struct sk_buff_head resp_q;
 335
 336         struct workqueue_struct *wq;
 337         struct work_struct cmd_work;
 338         struct work_struct cmd_complete_work;
 339         struct work_struct poll_work;
 340         struct work_struct mi_work;
 341         struct work_struct tg_work;
 342         struct timer_list listen_timer;
 343         struct pn533_frame *wq_in_frame;
 344         int wq_in_error;
 345         int cancel_listen;
 346
 347         pn533_cmd_complete_t cmd_complete;
 348         void *cmd_complete_arg;
 349         void *cmd_complete_mi_arg;
 350         struct mutex cmd_lock;
 351         u8 cmd;
 352
 353         struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
 354         u8 poll_mod_count;
 355         u8 poll_mod_curr;
 356         u32 poll_protocols;
 357         u32 listen_protocols;
 358
 359         u8 *gb;
 360         size_t gb_len;
 361
 362         u8 tgt_available_prots;
 363         u8 tgt_active_prot;
 364         u8 tgt_mode;
 365
 366         u32 device_type;
 367
 368         struct list_head cmd_queue;
 369         u8 cmd_pending;
 370 };
 371
 372 struct pn533_cmd {
 373         struct list_head queue;
 374         struct pn533_frame *out_frame;
 375         struct pn533_frame *in_frame;
 376         int in_frame_len;
 377         u8 cmd_code;
 378         struct sk_buff *req;
 379         struct sk_buff *resp;
 380         pn533_cmd_complete_t cmd_complete;
 381         void *arg;
 382 };
 383
 384 struct pn533_frame {
 385         u8 preamble;
 386         __be16 start_frame;
 387         u8 datalen;
 388         u8 datalen_checksum;
 389         u8 data[];
 390 } __packed;
 391
 392 /* The rule: value + checksum = 0 */
 393 static inline u8 pn533_checksum(u8 value)
 394 {
 395         return ~value + 1;
 396 }
 397
 398 /* The rule: sum(data elements) + checksum = 0 */
 399 static u8 pn533_data_checksum(u8 *data, int datalen)
 400 {
 401         u8 sum = 0;
 402         int i;
 403
 404         for (i = 0; i < datalen; i++)
 405                 sum += data[i];
 406
 407         return pn533_checksum(sum);
 408 }
 409
 410 /**
 411  * pn533_tx_frame_ack - create a ack frame
 412  * @frame:      The frame to be set as ack
 413  *
 414  * Ack is different type of standard frame. As a standard frame, it has
 415  * preamble and start_frame. However the checksum of this frame must fail,
 416  * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test
 417  * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack.
 418  * After datalen_checksum field, the postamble is placed.
 419  */
 420 static void pn533_tx_frame_ack(struct pn533_frame *frame)
 421 {
 422         frame->preamble = 0;
 423         frame->start_frame = cpu_to_be16(PN533_SOF);
 424         frame->datalen = 0;
 425         frame->datalen_checksum = 0xFF;
 426         /* data[0] is used as postamble */
 427         frame->data[0] = 0;
 428 }
 429
 430 static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd)
 431 {
 432         frame->preamble = 0;
 433         frame->start_frame = cpu_to_be16(PN533_SOF);
 434         PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT;
 435         PN533_FRAME_CMD(frame) = cmd;
 436         frame->datalen = 2;
 437 }
 438
 439 static void pn533_tx_frame_finish(struct pn533_frame *frame)
 440 {
 441         frame->datalen_checksum = pn533_checksum(frame->datalen);
 442
 443         PN533_FRAME_CHECKSUM(frame) =
 444                 pn533_data_checksum(frame->data, frame->datalen);
 445
 446         PN533_FRAME_POSTAMBLE(frame) = 0;
 447 }
 448
 449 static bool pn533_rx_frame_is_valid(struct pn533_frame *frame)
 450 {
 451         u8 checksum;
 452
 453         if (frame->start_frame != cpu_to_be16(PN533_SOF))
 454                 return false;
 455
 456         checksum = pn533_checksum(frame->datalen);
 457         if (checksum != frame->datalen_checksum)
 458                 return false;
 459
 460         checksum = pn533_data_checksum(frame->data, frame->datalen);
 461         if (checksum != PN533_FRAME_CHECKSUM(frame))
 462                 return false;
 463
 464         return true;
 465 }
 466
 467 static bool pn533_rx_frame_is_ack(struct pn533_frame *frame)
 468 {
 469         if (frame->start_frame != cpu_to_be16(PN533_SOF))
 470                 return false;
 471
 472         if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
 473                 return false;
 474
 475         return true;
 476 }
 477
 478 static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
 479 {
 480         return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
 481 }
 482
 483
 484 static void pn533_wq_cmd_complete(struct work_struct *work)
 485 {
 486         struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
 487         struct pn533_frame *in_frame;
 488         int rc;
 489
 490         in_frame = dev->wq_in_frame;
 491
 492         if (dev->wq_in_error)
 493                 rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
 494                                                         dev->wq_in_error);
 495         else
 496                 rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
 497                                         PN533_FRAME_CMD_PARAMS_PTR(in_frame),
 498                                         PN533_FRAME_CMD_PARAMS_LEN(in_frame));
 499
 500         if (rc != -EINPROGRESS)
 501                 queue_work(dev->wq, &dev->cmd_work);
 502 }
 503
 504 static void pn533_recv_response(struct urb *urb)
 505 {
 506         struct pn533 *dev = urb->context;
 507         struct pn533_frame *in_frame;
 508
 509         dev->wq_in_frame = NULL;
 510
 511         switch (urb->status) {
 512         case 0:
 513                 /* success */
 514                 break;
 515         case -ECONNRESET:
 516         case -ENOENT:
 517         case -ESHUTDOWN:
 518                 nfc_dev_dbg(&dev->interface->dev,
 519                             "Urb shutting down with status: %d", urb->status);
 520                 dev->wq_in_error = urb->status;
 521                 goto sched_wq;
 522         default:
 523                 nfc_dev_err(&dev->interface->dev,
 524                             "Nonzero urb status received: %d", urb->status);
 525                 dev->wq_in_error = urb->status;
 526                 goto sched_wq;
 527         }
 528
 529         in_frame = dev->in_urb->transfer_buffer;
 530
 531         print_hex_dump(KERN_DEBUG, "PN533 RX: ", DUMP_PREFIX_NONE, 16, 1,
 532                        in_frame, PN533_FRAME_SIZE(in_frame), false);
 533
 534         if (!pn533_rx_frame_is_valid(in_frame)) {
 535                 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
 536                 dev->wq_in_error = -EIO;
 537                 goto sched_wq;
 538         }
 539
 540         if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
 541                 nfc_dev_err(&dev->interface->dev,
 542                             "It it not the response to the last command");
 543                 dev->wq_in_error = -EIO;
 544                 goto sched_wq;
 545         }
 546
 547         nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
 548         dev->wq_in_error = 0;
 549         dev->wq_in_frame = in_frame;
 550
 551 sched_wq:
 552         queue_work(dev->wq, &dev->cmd_complete_work);
 553 }
 554
 555 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
 556 {
 557         dev->in_urb->complete = pn533_recv_response;
 558
 559         return usb_submit_urb(dev->in_urb, flags);
 560 }
 561
 562 static void pn533_recv_ack(struct urb *urb)
 563 {
 564         struct pn533 *dev = urb->context;
 565         struct pn533_frame *in_frame;
 566         int rc;
 567
 568         switch (urb->status) {
 569         case 0:
 570                 /* success */
 571                 break;
 572         case -ECONNRESET:
 573         case -ENOENT:
 574         case -ESHUTDOWN:
 575                 nfc_dev_dbg(&dev->interface->dev,
 576                             "Urb shutting down with status: %d", urb->status);
 577                 dev->wq_in_error = urb->status;
 578                 goto sched_wq;
 579         default:
 580                 nfc_dev_err(&dev->interface->dev,
 581                             "Nonzero urb status received: %d", urb->status);
 582                 dev->wq_in_error = urb->status;
 583                 goto sched_wq;
 584         }
 585
 586         in_frame = dev->in_urb->transfer_buffer;
 587
 588         if (!pn533_rx_frame_is_ack(in_frame)) {
 589                 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
 590                 dev->wq_in_error = -EIO;
 591                 goto sched_wq;
 592         }
 593
 594         nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
 595
 596         rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
 597         if (rc) {
 598                 nfc_dev_err(&dev->interface->dev,
 599                             "usb_submit_urb failed with result %d", rc);
 600                 dev->wq_in_error = rc;
 601                 goto sched_wq;
 602         }
 603
 604         return;
 605
 606 sched_wq:
 607         dev->wq_in_frame = NULL;
 608         queue_work(dev->wq, &dev->cmd_complete_work);
 609 }
 610
 611 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
 612 {
 613         dev->in_urb->complete = pn533_recv_ack;
 614
 615         return usb_submit_urb(dev->in_urb, flags);
 616 }
 617
 618 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
 619 {
 620         int rc;
 621
 622         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 623
 624         pn533_tx_frame_ack(dev->out_frame);
 625
 626         dev->out_urb->transfer_buffer = dev->out_frame;
 627         dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
 628         rc = usb_submit_urb(dev->out_urb, flags);
 629
 630         return rc;
 631 }
 632
 633 static int __pn533_send_cmd_frame_async(struct pn533 *dev,
 634                                         struct pn533_frame *out_frame,
 635                                         struct pn533_frame *in_frame,
 636                                         int in_frame_len,
 637                                         pn533_cmd_complete_t cmd_complete,
 638                                         void *arg)
 639 {
 640         int rc;
 641
 642         nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
 643                     PN533_FRAME_CMD(out_frame));
 644
 645         dev->cmd = PN533_FRAME_CMD(out_frame);
 646         dev->cmd_complete = cmd_complete;
 647         dev->cmd_complete_arg = arg;
 648
 649         dev->out_urb->transfer_buffer = out_frame;
 650         dev->out_urb->transfer_buffer_length =
 651                                 PN533_FRAME_SIZE(out_frame);
 652
 653         dev->in_urb->transfer_buffer = in_frame;
 654         dev->in_urb->transfer_buffer_length = in_frame_len;
 655
 656         print_hex_dump(KERN_DEBUG, "PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
 657                        out_frame, PN533_FRAME_SIZE(out_frame), false);
 658
 659         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
 660         if (rc)
 661                 return rc;
 662
 663         rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
 664         if (rc)
 665                 goto error;
 666
 667         return 0;
 668
 669 error:
 670         usb_unlink_urb(dev->out_urb);
 671         return rc;
 672 }
 673
 674 static void pn533_build_cmd_frame(u8 cmd_code, struct sk_buff *skb)
 675 {
 676         struct pn533_frame *frame;
 677         /* payload is already there, just update datalen */
 678         int payload_len = skb->len;
 679
 680         skb_push(skb, PN533_FRAME_HEADER_LEN);
 681         skb_put(skb, PN533_FRAME_TAIL_LEN);
 682
 683         frame = (struct pn533_frame *)skb->data;
 684
 685         pn533_tx_frame_init(frame, cmd_code);
 686         frame->datalen += payload_len;
 687         pn533_tx_frame_finish(frame);
 688 }
 689
 690 struct pn533_send_async_complete_arg {
 691         pn533_send_async_complete_t  complete_cb;
 692         void *complete_cb_context;
 693         struct sk_buff *resp;
 694         struct sk_buff *req;
 695 };
 696
 697 static int pn533_send_async_complete(struct pn533 *dev, void *_arg, u8 *params,
 698                                      int params_len)
 699 {
 700         struct pn533_send_async_complete_arg *arg = _arg;
 701
 702         struct sk_buff *req = arg->req;
 703         struct sk_buff *resp = arg->resp;
 704
 705         struct pn533_frame *frame = (struct pn533_frame *)resp->data;
 706         int rc;
 707
 708         dev_kfree_skb(req);
 709
 710         if (params_len < 0) {
 711                 nfc_dev_err(&dev->interface->dev,
 712                             "Error %d when starting as a target",
 713                             params_len);
 714
 715                 arg->complete_cb(dev, arg->complete_cb_context,
 716                                  ERR_PTR(params_len));
 717                 rc = params_len;
 718                 dev_kfree_skb(resp);
 719                 goto out;
 720         }
 721
 722         skb_put(resp, PN533_FRAME_SIZE(frame));
 723         skb_pull(resp, PN533_FRAME_HEADER_LEN);
 724         skb_trim(resp, resp->len - PN533_FRAME_TAIL_LEN);
 725
 726         rc = arg->complete_cb(dev, arg->complete_cb_context, resp);
 727
 728 out:
 729         kfree(arg);
 730         return rc;
 731 }
 732
 733 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
 734                               struct sk_buff *req, struct sk_buff *resp,
 735                               int resp_len,
 736                               pn533_send_async_complete_t complete_cb,
 737                               void *complete_cb_context)
 738 {
 739         struct pn533_cmd *cmd;
 740         struct pn533_send_async_complete_arg *arg;
 741         int rc = 0;
 742
 743         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 744
 745         arg = kzalloc(sizeof(arg), GFP_KERNEL);
 746         if (!arg)
 747                 return -ENOMEM;
 748
 749         arg->complete_cb = complete_cb;
 750         arg->complete_cb_context = complete_cb_context;
 751         arg->resp = resp;
 752         arg->req = req;
 753
 754         pn533_build_cmd_frame(cmd_code, req);
 755
 756         mutex_lock(&dev->cmd_lock);
 757
 758         if (!dev->cmd_pending) {
 759                 rc = __pn533_send_cmd_frame_async(dev,
 760                                                   (struct pn533_frame *)req->data,
 761                                                   (struct pn533_frame *)resp->data,
 762                                                   resp_len, pn533_send_async_complete,
 763                                                   arg);
 764                 if (rc)
 765                         goto error;
 766
 767                 dev->cmd_pending = 1;
 768                 goto unlock;
 769         }
 770
 771         nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
 772
 773         cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL);
 774         if (!cmd) {
 775                 rc = -ENOMEM;
 776                 goto error;
 777         }
 778
 779         INIT_LIST_HEAD(&cmd->queue);
 780         cmd->cmd_code = cmd_code;
 781         cmd->req = req;
 782         cmd->resp = resp;
 783         cmd->arg = arg;
 784
 785         list_add_tail(&cmd->queue, &dev->cmd_queue);
 786
 787         goto unlock;
 788
 789 error:
 790         kfree(arg);
 791 unlock:
 792         mutex_unlock(&dev->cmd_lock);
 793         return rc;
 794 }
 795
 796 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
 797                                  struct sk_buff *req,
 798                                  pn533_send_async_complete_t complete_cb,
 799                                  void *complete_cb_context)
 800 {
 801         struct sk_buff *resp;
 802         int rc;
 803         int  resp_len = PN533_FRAME_HEADER_LEN +
 804                         PN533_FRAME_MAX_PAYLOAD_LEN +
 805                         PN533_FRAME_TAIL_LEN;
 806
 807         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 808
 809         resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
 810         if (!resp)
 811                 return -ENOMEM;
 812
 813         rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
 814                                 complete_cb_context);
 815         if (rc)
 816                 dev_kfree_skb(resp);
 817
 818         return rc;
 819 }
 820
 821 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
 822                                 struct sk_buff *req,
 823                                 pn533_send_async_complete_t complete_cb,
 824                                 void *complete_cb_context)
 825 {
 826         struct sk_buff *resp;
 827         int rc;
 828
 829         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 830
 831         resp = alloc_skb(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
 832         if (!resp)
 833                 return -ENOMEM;
 834
 835         rc = __pn533_send_async(dev, cmd_code, req, resp,
 836                                 PN533_NORMAL_FRAME_MAX_LEN,
 837                                 complete_cb, complete_cb_context);
 838         if (rc)
 839                 dev_kfree_skb(resp);
 840
 841         return rc;
 842 }
 843
 844 /*
 845  * pn533_send_cmd_direct_async
 846  *
 847  * The function sends a piority cmd directly to the chip omiting the cmd
 848  * queue. It's intended to be used by chaining mechanism of received responses
 849  * where the host has to request every single chunk of data before scheduling
 850  * next cmd from the queue.
 851  */
 852 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
 853                                        struct sk_buff *req,
 854                                        pn533_send_async_complete_t complete_cb,
 855                                        void *complete_cb_context)
 856 {
 857         struct pn533_send_async_complete_arg *arg;
 858         struct sk_buff *resp;
 859         int rc;
 860         int resp_len = PN533_FRAME_HEADER_LEN +
 861                        PN533_FRAME_MAX_PAYLOAD_LEN +
 862                        PN533_FRAME_TAIL_LEN;
 863
 864         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 865
 866         resp = alloc_skb(resp_len, GFP_KERNEL);
 867         if (!resp)
 868                 return -ENOMEM;
 869
 870         arg = kzalloc(sizeof(arg), GFP_KERNEL);
 871         if (!arg) {
 872                 dev_kfree_skb(resp);
 873                 return -ENOMEM;
 874         }
 875
 876         arg->complete_cb = complete_cb;
 877         arg->complete_cb_context = complete_cb_context;
 878         arg->resp = resp;
 879         arg->req = req;
 880
 881         pn533_build_cmd_frame(cmd_code, req);
 882
 883         rc = __pn533_send_cmd_frame_async(dev, (struct pn533_frame *)req->data,
 884                                           (struct pn533_frame *)resp->data,
 885                                           resp_len, pn533_send_async_complete,
 886                                           arg);
 887         if (rc < 0) {
 888                 dev_kfree_skb(resp);
 889                 kfree(arg);
 890         }
 891
 892         return rc;
 893 }
 894
 895 static void pn533_wq_cmd(struct work_struct *work)
 896 {
 897         struct pn533 *dev = container_of(work, struct pn533, cmd_work);
 898         struct pn533_cmd *cmd;
 899
 900         mutex_lock(&dev->cmd_lock);
 901
 902         if (list_empty(&dev->cmd_queue)) {
 903                 dev->cmd_pending = 0;
 904                 mutex_unlock(&dev->cmd_lock);
 905                 return;
 906         }
 907
 908         cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
 909
 910         list_del(&cmd->queue);
 911
 912         mutex_unlock(&dev->cmd_lock);
 913
 914         if (cmd->cmd_code != PN533_CMD_UNDEF)
 915                 __pn533_send_cmd_frame_async(dev,
 916                                              (struct pn533_frame *)cmd->req->data,
 917                                              (struct pn533_frame *)cmd->resp->data,
 918                                              PN533_NORMAL_FRAME_MAX_LEN,
 919                                              pn533_send_async_complete,
 920                                              cmd->arg);
 921         else
 922                 __pn533_send_cmd_frame_async(dev, cmd->out_frame, cmd->in_frame,
 923                                              cmd->in_frame_len,
 924                                              cmd->cmd_complete, cmd->arg);
 925
 926         kfree(cmd);
 927 }
 928
 929 static int pn533_send_cmd_frame_async(struct pn533 *dev,
 930                                         struct pn533_frame *out_frame,
 931                                         struct pn533_frame *in_frame,
 932                                         int in_frame_len,
 933                                         pn533_cmd_complete_t cmd_complete,
 934                                         void *arg)
 935 {
 936         struct pn533_cmd *cmd;
 937         int rc = 0;
 938
 939         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 940
 941         mutex_lock(&dev->cmd_lock);
 942
 943         if (!dev->cmd_pending) {
 944                 rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
 945                                                   in_frame_len, cmd_complete,
 946                                                   arg);
 947                 if (!rc)
 948                         dev->cmd_pending = 1;
 949
 950                 goto unlock;
 951         }
 952
 953         nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
 954
 955         cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL);
 956         if (!cmd) {
 957                 rc = -ENOMEM;
 958                 goto unlock;
 959         }
 960
 961         INIT_LIST_HEAD(&cmd->queue);
 962         cmd->out_frame = out_frame;
 963         cmd->in_frame = in_frame;
 964         cmd->in_frame_len = in_frame_len;
 965         cmd->cmd_code = PN533_CMD_UNDEF;
 966         cmd->cmd_complete = cmd_complete;
 967         cmd->arg = arg;
 968
 969         list_add_tail(&cmd->queue, &dev->cmd_queue);
 970
 971 unlock:
 972         mutex_unlock(&dev->cmd_lock);
 973
 974         return rc;
 975 }
 976
 977 struct pn533_sync_cmd_response {
 978         struct sk_buff *resp;
 979         struct completion done;
 980 };
 981
 982 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
 983                                     struct sk_buff *resp)
 984 {
 985         struct pn533_sync_cmd_response *arg = _arg;
 986
 987         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 988
 989         arg->resp = resp;
 990         complete(&arg->done);
 991
 992         return 0;
 993 }
 994
 995 /*  pn533_send_cmd_sync
 996  *
 997  *  Please note the req parameter is freed inside the function to
 998  *  limit a number of return value interpretations by the caller.
 999  *
1000  *  1. negative in case of error during TX path -> req should be freed
1001  *
1002  *  2. negative in case of error during RX path -> req should not be freed
1003  *     as it's been already freed at the begining of RX path by
1004  *     async_complete_cb.
1005  *
1006  *  3. valid pointer in case of succesfult RX path
1007  *
1008  *  A caller has to check a return value with IS_ERR macro. If the test pass,
1009  *  the returned pointer is valid.
1010  *
1011  * */
1012 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1013                                                struct sk_buff *req)
1014 {
1015         int rc;
1016         struct pn533_sync_cmd_response arg;
1017
1018         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1019
1020         init_completion(&arg.done);
1021
1022         rc = pn533_send_cmd_async(dev, cmd_code, req,
1023                                   pn533_send_sync_complete, &arg);
1024         if (rc) {
1025                 dev_kfree_skb(req);
1026                 return ERR_PTR(rc);
1027         }
1028
1029         wait_for_completion(&arg.done);
1030
1031         return arg.resp;
1032 }
1033
1034 static void pn533_send_complete(struct urb *urb)
1035 {
1036         struct pn533 *dev = urb->context;
1037
1038         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1039
1040         switch (urb->status) {
1041         case 0:
1042                 /* success */
1043                 break;
1044         case -ECONNRESET:
1045         case -ENOENT:
1046         case -ESHUTDOWN:
1047                 nfc_dev_dbg(&dev->interface->dev,
1048                             "Urb shutting down with status: %d", urb->status);
1049                 break;
1050         default:
1051                 nfc_dev_dbg(&dev->interface->dev,
1052                             "Nonzero urb status received: %d", urb->status);
1053         }
1054 }
1055
1056 static struct sk_buff *pn533_alloc_skb(unsigned int size)
1057 {
1058         struct sk_buff *skb;
1059
1060         skb = alloc_skb(PN533_FRAME_HEADER_LEN +
1061                         size +
1062                         PN533_FRAME_TAIL_LEN, GFP_KERNEL);
1063
1064         if (skb)
1065                 skb_reserve(skb, PN533_FRAME_HEADER_LEN);
1066
1067         return skb;
1068 }
1069
1070 struct pn533_target_type_a {
1071         __be16 sens_res;
1072         u8 sel_res;
1073         u8 nfcid_len;
1074         u8 nfcid_data[];
1075 } __packed;
1076
1077
1078 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1079 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1080 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1081
1082 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1083 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1084
1085 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1086 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1087
1088 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
1089 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
1090 #define PN533_TYPE_A_SEL_PROT_DEP 2
1091 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1092
1093 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1094                                                         int target_data_len)
1095 {
1096         u8 ssd;
1097         u8 platconf;
1098
1099         if (target_data_len < sizeof(struct pn533_target_type_a))
1100                 return false;
1101
1102         /* The lenght check of nfcid[] and ats[] are not being performed because
1103            the values are not being used */
1104
1105         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1106         ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1107         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1108
1109         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1110              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1111             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1112              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1113                 return false;
1114
1115         /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1116         if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1117                 return false;
1118
1119         return true;
1120 }
1121
1122 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1123                                                         int tgt_data_len)
1124 {
1125         struct pn533_target_type_a *tgt_type_a;
1126
1127         tgt_type_a = (struct pn533_target_type_a *)tgt_data;
1128
1129         if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1130                 return -EPROTO;
1131
1132         switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1133         case PN533_TYPE_A_SEL_PROT_MIFARE:
1134                 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1135                 break;
1136         case PN533_TYPE_A_SEL_PROT_ISO14443:
1137                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1138                 break;
1139         case PN533_TYPE_A_SEL_PROT_DEP:
1140                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1141                 break;
1142         case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1143                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1144                                                         NFC_PROTO_NFC_DEP_MASK;
1145                 break;
1146         }
1147
1148         nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1149         nfc_tgt->sel_res = tgt_type_a->sel_res;
1150         nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1151         memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
1152
1153         return 0;
1154 }
1155
1156 struct pn533_target_felica {
1157         u8 pol_res;
1158         u8 opcode;
1159         u8 nfcid2[8];
1160         u8 pad[8];
1161         /* optional */
1162         u8 syst_code[];
1163 } __packed;
1164
1165 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1166 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1167
1168 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1169                                                         int target_data_len)
1170 {
1171         if (target_data_len < sizeof(struct pn533_target_felica))
1172                 return false;
1173
1174         if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1175                 return false;
1176
1177         return true;
1178 }
1179
1180 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1181                                                         int tgt_data_len)
1182 {
1183         struct pn533_target_felica *tgt_felica;
1184
1185         tgt_felica = (struct pn533_target_felica *)tgt_data;
1186
1187         if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1188                 return -EPROTO;
1189
1190         if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1191             (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
1192                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1193         else
1194                 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1195
1196         memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1197         nfc_tgt->sensf_res_len = 9;
1198
1199         return 0;
1200 }
1201
1202 struct pn533_target_jewel {
1203         __be16 sens_res;
1204         u8 jewelid[4];
1205 } __packed;
1206
1207 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1208                                                         int target_data_len)
1209 {
1210         u8 ssd;
1211         u8 platconf;
1212
1213         if (target_data_len < sizeof(struct pn533_target_jewel))
1214                 return false;
1215
1216         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1217         ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1218         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1219
1220         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1221              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1222             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1223              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1224                 return false;
1225
1226         return true;
1227 }
1228
1229 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1230                                                         int tgt_data_len)
1231 {
1232         struct pn533_target_jewel *tgt_jewel;
1233
1234         tgt_jewel = (struct pn533_target_jewel *)tgt_data;
1235
1236         if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1237                 return -EPROTO;
1238
1239         nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1240         nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
1241         nfc_tgt->nfcid1_len = 4;
1242         memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
1243
1244         return 0;
1245 }
1246
1247 struct pn533_type_b_prot_info {
1248         u8 bitrate;
1249         u8 fsci_type;
1250         u8 fwi_adc_fo;
1251 } __packed;
1252
1253 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1254 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1255 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1256
1257 struct pn533_type_b_sens_res {
1258         u8 opcode;
1259         u8 nfcid[4];
1260         u8 appdata[4];
1261         struct pn533_type_b_prot_info prot_info;
1262 } __packed;
1263
1264 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1265
1266 struct pn533_target_type_b {
1267         struct pn533_type_b_sens_res sensb_res;
1268         u8 attrib_res_len;
1269         u8 attrib_res[];
1270 } __packed;
1271
1272 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1273                                                         int target_data_len)
1274 {
1275         if (target_data_len < sizeof(struct pn533_target_type_b))
1276                 return false;
1277
1278         if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1279                 return false;
1280
1281         if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1282                                                 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1283                 return false;
1284
1285         return true;
1286 }
1287
1288 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1289                                                         int tgt_data_len)
1290 {
1291         struct pn533_target_type_b *tgt_type_b;
1292
1293         tgt_type_b = (struct pn533_target_type_b *)tgt_data;
1294
1295         if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1296                 return -EPROTO;
1297
1298         nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1299
1300         return 0;
1301 }
1302
1303 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1304                               int tgdata_len)
1305 {
1306         struct nfc_target nfc_tgt;
1307         int rc;
1308
1309         nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
1310                     dev->poll_mod_curr);
1311
1312         if (tg != 1)
1313                 return -EPROTO;
1314
1315         memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1316
1317         switch (dev->poll_mod_curr) {
1318         case PN533_POLL_MOD_106KBPS_A:
1319                 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
1320                 break;
1321         case PN533_POLL_MOD_212KBPS_FELICA:
1322         case PN533_POLL_MOD_424KBPS_FELICA:
1323                 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
1324                 break;
1325         case PN533_POLL_MOD_106KBPS_JEWEL:
1326                 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
1327                 break;
1328         case PN533_POLL_MOD_847KBPS_B:
1329                 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
1330                 break;
1331         default:
1332                 nfc_dev_err(&dev->interface->dev,
1333                             "Unknown current poll modulation");
1334                 return -EPROTO;
1335         }
1336
1337         if (rc)
1338                 return rc;
1339
1340         if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1341                 nfc_dev_dbg(&dev->interface->dev,
1342                             "The Tg found doesn't have the desired protocol");
1343                 return -EAGAIN;
1344         }
1345
1346         nfc_dev_dbg(&dev->interface->dev,
1347                     "Target found - supported protocols: 0x%x",
1348                     nfc_tgt.supported_protocols);
1349
1350         dev->tgt_available_prots = nfc_tgt.supported_protocols;
1351
1352         nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1353
1354         return 0;
1355 }
1356
1357 static inline void pn533_poll_next_mod(struct pn533 *dev)
1358 {
1359         dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1360 }
1361
1362 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1363 {
1364         dev->poll_mod_count = 0;
1365 }
1366
1367 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1368 {
1369         dev->poll_mod_active[dev->poll_mod_count] =
1370                 (struct pn533_poll_modulations *)&poll_mod[mod_index];
1371         dev->poll_mod_count++;
1372 }
1373
1374 static void pn533_poll_create_mod_list(struct pn533 *dev,
1375                                        u32 im_protocols, u32 tm_protocols)
1376 {
1377         pn533_poll_reset_mod_list(dev);
1378
1379         if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1380             (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1381             (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1382                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1383
1384         if (im_protocols & NFC_PROTO_FELICA_MASK ||
1385             im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1386                 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1387                 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1388         }
1389
1390         if (im_protocols & NFC_PROTO_JEWEL_MASK)
1391                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1392
1393         if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1394                 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1395
1396         if (tm_protocols)
1397                 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1398 }
1399
1400 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
1401 {
1402         u8 nbtg, tg, *tgdata;
1403         int rc, tgdata_len;
1404
1405         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1406
1407         nbtg = resp->data[0];
1408         tg = resp->data[1];
1409         tgdata = &resp->data[2];
1410         tgdata_len = resp->len - 2;  /* nbtg + tg */
1411
1412         if (nbtg) {
1413                 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1414
1415                 /* We must stop the poll after a valid target found */
1416                 if (rc == 0) {
1417                         pn533_poll_reset_mod_list(dev);
1418                         return 0;
1419                 }
1420         }
1421
1422         return -EAGAIN;
1423 }
1424
1425 static struct sk_buff *pn533_alloc_poll_tg_frame(u8 *gbytes, size_t gbytes_len)
1426 {
1427         struct sk_buff *skb;
1428         u8 *felica, *nfcid3, *gb;
1429
1430         u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1431                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1432                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1433                                 0xff, 0xff}; /* System code */
1434
1435         u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1436                                0x0, 0x0, 0x0,
1437                                0x40}; /* SEL_RES for DEP */
1438
1439         unsigned int skb_len = 36 + /* mode (1), mifare (6),
1440                                        felica (18), nfcid3 (10), gb_len (1) */
1441                                gbytes_len +
1442                                1;  /* len Tk*/
1443
1444         skb = pn533_alloc_skb(skb_len);
1445         if (!skb)
1446                 return NULL;
1447
1448         /* DEP support only */
1449         *skb_put(skb, 1) |= PN533_INIT_TARGET_DEP;
1450
1451         /* MIFARE params */
1452         memcpy(skb_put(skb, 6), mifare_params, 6);
1453
1454         /* Felica params */
1455         felica = skb_put(skb, 18);
1456         memcpy(felica, felica_params, 18);
1457         get_random_bytes(felica + 2, 6);
1458
1459         /* NFCID3 */
1460         nfcid3 = skb_put(skb, 10);
1461         memset(nfcid3, 0, 10);
1462         memcpy(nfcid3, felica, 8);
1463
1464         /* General bytes */
1465         *skb_put(skb, 1) = gbytes_len;
1466
1467         gb = skb_put(skb, gbytes_len);
1468         memcpy(gb, gbytes, gbytes_len);
1469
1470         /* Len Tk */
1471         *skb_put(skb, 1) = 0;
1472
1473         return skb;
1474 }
1475
1476 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
1477 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1478 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1479                                       struct sk_buff *resp)
1480 {
1481         u8 status;
1482
1483         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1484
1485         if (IS_ERR(resp))
1486                 return PTR_ERR(resp);
1487
1488         status = resp->data[0];
1489         skb_pull(resp, sizeof(status));
1490
1491         if (status != 0) {
1492                 nfc_tm_deactivated(dev->nfc_dev);
1493                 dev->tgt_mode = 0;
1494                 dev_kfree_skb(resp);
1495                 return 0;
1496         }
1497
1498         return nfc_tm_data_received(dev->nfc_dev, resp);
1499 }
1500
1501 static void pn533_wq_tg_get_data(struct work_struct *work)
1502 {
1503         struct pn533 *dev = container_of(work, struct pn533, tg_work);
1504
1505         struct sk_buff *skb;
1506         int rc;
1507
1508         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1509
1510         skb = pn533_alloc_skb(0);
1511         if (!skb)
1512                 return;
1513
1514         rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1515                                    pn533_tm_get_data_complete, NULL);
1516
1517         if (rc < 0)
1518                 dev_kfree_skb(skb);
1519
1520         return;
1521 }
1522
1523 #define ATR_REQ_GB_OFFSET 17
1524 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1525 {
1526         u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1527         size_t gb_len;
1528         int rc;
1529
1530         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1531
1532         if (resp->len < ATR_REQ_GB_OFFSET + 1)
1533                 return -EINVAL;
1534
1535         mode = resp->data[0];
1536         cmd = &resp->data[1];
1537
1538         nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1539                     mode, resp->len);
1540
1541         if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1542             PN533_INIT_TARGET_RESP_ACTIVE)
1543                 comm_mode = NFC_COMM_ACTIVE;
1544
1545         if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0)  /* Only DEP supported */
1546                 return -EOPNOTSUPP;
1547
1548         gb = cmd + ATR_REQ_GB_OFFSET;
1549         gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1550
1551         rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1552                               comm_mode, gb, gb_len);
1553         if (rc < 0) {
1554                 nfc_dev_err(&dev->interface->dev,
1555                             "Error when signaling target activation");
1556                 return rc;
1557         }
1558
1559         dev->tgt_mode = 1;
1560         queue_work(dev->wq, &dev->tg_work);
1561
1562         return 0;
1563 }
1564
1565 static void pn533_listen_mode_timer(unsigned long data)
1566 {
1567         struct pn533 *dev = (struct pn533 *)data;
1568
1569         nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1570
1571         /* An ack will cancel the last issued command (poll) */
1572         pn533_send_ack(dev, GFP_ATOMIC);
1573
1574         dev->cancel_listen = 1;
1575
1576         pn533_poll_next_mod(dev);
1577
1578         queue_work(dev->wq, &dev->poll_work);
1579 }
1580
1581 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1582                                struct sk_buff *resp)
1583 {
1584         struct pn533_poll_modulations *cur_mod;
1585         int rc;
1586
1587         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1588
1589         if (IS_ERR(resp)) {
1590                 rc = PTR_ERR(resp);
1591
1592                 nfc_dev_err(&dev->interface->dev, "%s  Poll complete error %d",
1593                             __func__, rc);
1594
1595                 if (rc == -ENOENT) {
1596                         if (dev->poll_mod_count != 0)
1597                                 return rc;
1598                         else
1599                                 goto stop_poll;
1600                 } else if (rc < 0) {
1601                         nfc_dev_err(&dev->interface->dev,
1602                                     "Error %d when running poll", rc);
1603                         goto stop_poll;
1604                 }
1605         }
1606
1607         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1608
1609         if (cur_mod->len == 0) { /* Target mode */
1610                 del_timer(&dev->listen_timer);
1611                 rc = pn533_init_target_complete(dev, resp);
1612                 goto done;
1613         }
1614
1615         /* Initiator mode */
1616         rc = pn533_start_poll_complete(dev, resp);
1617         if (!rc)
1618                 goto done;
1619
1620         pn533_poll_next_mod(dev);
1621         queue_work(dev->wq, &dev->poll_work);
1622
1623 done:
1624         dev_kfree_skb(resp);
1625         return rc;
1626
1627 stop_poll:
1628         nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1629
1630         pn533_poll_reset_mod_list(dev);
1631         dev->poll_protocols = 0;
1632         return rc;
1633 }
1634
1635 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533_poll_modulations
1636                                                  *mod)
1637 {
1638         struct sk_buff *skb;
1639
1640         skb = pn533_alloc_skb(mod->len);
1641         if (!skb)
1642                 return NULL;
1643
1644         memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
1645
1646         return skb;
1647 }
1648
1649 static int pn533_send_poll_frame(struct pn533 *dev)
1650 {
1651         struct pn533_poll_modulations *mod;
1652         struct sk_buff *skb;
1653         int rc;
1654         u8 cmd_code;
1655
1656         mod = dev->poll_mod_active[dev->poll_mod_curr];
1657
1658         nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1659                     __func__, mod->len);
1660
1661         if (mod->len == 0) {  /* Listen mode */
1662                 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1663                 skb = pn533_alloc_poll_tg_frame(dev->gb, dev->gb_len);
1664         } else {  /* Polling mode */
1665                 cmd_code =  PN533_CMD_IN_LIST_PASSIVE_TARGET;
1666                 skb = pn533_alloc_poll_in_frame(mod);
1667         }
1668
1669         if (!skb) {
1670                 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1671                 return -ENOMEM;
1672         }
1673
1674         rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1675                                   NULL);
1676         if (rc < 0) {
1677                 dev_kfree_skb(skb);
1678                 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
1679         }
1680
1681         return rc;
1682 }
1683
1684 static void pn533_wq_poll(struct work_struct *work)
1685 {
1686         struct pn533 *dev = container_of(work, struct pn533, poll_work);
1687         struct pn533_poll_modulations *cur_mod;
1688         int rc;
1689
1690         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1691
1692         nfc_dev_dbg(&dev->interface->dev,
1693                     "%s cancel_listen %d modulation len %d",
1694                     __func__, dev->cancel_listen, cur_mod->len);
1695
1696         if (dev->cancel_listen == 1) {
1697                 dev->cancel_listen = 0;
1698                 usb_kill_urb(dev->in_urb);
1699         }
1700
1701         rc = pn533_send_poll_frame(dev);
1702         if (rc)
1703                 return;
1704
1705         if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1706                 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1707
1708         return;
1709 }
1710
1711 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1712                             u32 im_protocols, u32 tm_protocols)
1713 {
1714         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1715
1716         nfc_dev_dbg(&dev->interface->dev,
1717                     "%s: im protocols 0x%x tm protocols 0x%x",
1718                     __func__, im_protocols, tm_protocols);
1719
1720         if (dev->tgt_active_prot) {
1721                 nfc_dev_err(&dev->interface->dev,
1722                             "Cannot poll with a target already activated");
1723                 return -EBUSY;
1724         }
1725
1726         if (dev->tgt_mode) {
1727                 nfc_dev_err(&dev->interface->dev,
1728                             "Cannot poll while already being activated");
1729                 return -EBUSY;
1730         }
1731
1732         if (tm_protocols) {
1733                 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1734                 if (dev->gb == NULL)
1735                         tm_protocols = 0;
1736         }
1737
1738         dev->poll_mod_curr = 0;
1739         pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1740         dev->poll_protocols = im_protocols;
1741         dev->listen_protocols = tm_protocols;
1742
1743         return pn533_send_poll_frame(dev);
1744 }
1745
1746 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1747 {
1748         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1749
1750         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1751
1752         del_timer(&dev->listen_timer);
1753
1754         if (!dev->poll_mod_count) {
1755                 nfc_dev_dbg(&dev->interface->dev,
1756                             "Polling operation was not running");
1757                 return;
1758         }
1759
1760         /* An ack will cancel the last issued command (poll) */
1761         pn533_send_ack(dev, GFP_KERNEL);
1762
1763         /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1764         usb_kill_urb(dev->in_urb);
1765
1766         pn533_poll_reset_mod_list(dev);
1767 }
1768
1769 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1770 {
1771         struct pn533_cmd_activate_response *rsp;
1772         u16 gt_len;
1773         int rc;
1774
1775         struct sk_buff *skb;
1776         struct sk_buff *resp;
1777
1778         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1779
1780         skb = pn533_alloc_skb(sizeof(u8) * 2); /*TG + Next*/
1781         if (!skb)
1782                 return -ENOMEM;
1783
1784         *skb_put(skb, sizeof(u8)) = 1; /* TG */
1785         *skb_put(skb, sizeof(u8)) = 0; /* Next */
1786
1787         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1788         if (IS_ERR(resp))
1789                 return PTR_ERR(resp);
1790
1791         rsp = (struct pn533_cmd_activate_response *)resp->data;
1792         rc = rsp->status & PN533_CMD_RET_MASK;
1793         if (rc != PN533_CMD_RET_SUCCESS)
1794                 dev_kfree_skb(resp);
1795                 return -EIO;
1796
1797         /* ATR_RES general bytes are located at offset 16 */
1798         gt_len = resp->len - 16;
1799         rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1800
1801         dev_kfree_skb(resp);
1802         return rc;
1803 }
1804
1805 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1806                                  struct nfc_target *target, u32 protocol)
1807 {
1808         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1809         int rc;
1810
1811         nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1812                     protocol);
1813
1814         if (dev->poll_mod_count) {
1815                 nfc_dev_err(&dev->interface->dev,
1816                             "Cannot activate while polling");
1817                 return -EBUSY;
1818         }
1819
1820         if (dev->tgt_active_prot) {
1821                 nfc_dev_err(&dev->interface->dev,
1822                             "There is already an active target");
1823                 return -EBUSY;
1824         }
1825
1826         if (!dev->tgt_available_prots) {
1827                 nfc_dev_err(&dev->interface->dev,
1828                             "There is no available target to activate");
1829                 return -EINVAL;
1830         }
1831
1832         if (!(dev->tgt_available_prots & (1 << protocol))) {
1833                 nfc_dev_err(&dev->interface->dev,
1834                             "Target doesn't support requested proto %u",
1835                             protocol);
1836                 return -EINVAL;
1837         }
1838
1839         if (protocol == NFC_PROTO_NFC_DEP) {
1840                 rc = pn533_activate_target_nfcdep(dev);
1841                 if (rc) {
1842                         nfc_dev_err(&dev->interface->dev,
1843                                     "Activating target with DEP failed %d", rc);
1844                         return rc;
1845                 }
1846         }
1847
1848         dev->tgt_active_prot = protocol;
1849         dev->tgt_available_prots = 0;
1850
1851         return 0;
1852 }
1853
1854 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1855                                     struct nfc_target *target)
1856 {
1857         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1858
1859         struct sk_buff *skb;
1860         struct sk_buff *resp;
1861
1862         int rc;
1863
1864         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1865
1866         if (!dev->tgt_active_prot) {
1867                 nfc_dev_err(&dev->interface->dev, "There is no active target");
1868                 return;
1869         }
1870
1871         dev->tgt_active_prot = 0;
1872         skb_queue_purge(&dev->resp_q);
1873
1874         skb = pn533_alloc_skb(sizeof(u8));
1875         if (!skb)
1876                 return;
1877
1878         *skb_put(skb, 1) = 1; /* TG*/
1879
1880         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1881         if (IS_ERR(resp))
1882                 return;
1883
1884         rc = resp->data[0] & PN533_CMD_RET_MASK;
1885         if (rc != PN533_CMD_RET_SUCCESS)
1886                 nfc_dev_err(&dev->interface->dev,
1887                             "Error 0x%x when releasing the target", rc);
1888
1889         dev_kfree_skb(resp);
1890         return;
1891 }
1892
1893
1894 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1895                                          struct sk_buff *resp)
1896 {
1897         struct pn533_cmd_jump_dep_response *rsp;
1898         u8 target_gt_len;
1899         int rc;
1900         u8 active = *(u8 *)arg;
1901
1902         kfree(arg);
1903
1904         if (IS_ERR(resp))
1905                 return PTR_ERR(resp);
1906
1907         if (dev->tgt_available_prots &&
1908             !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1909                 nfc_dev_err(&dev->interface->dev,
1910                             "The target does not support DEP");
1911                 rc =  -EINVAL;
1912                 goto error;
1913         }
1914
1915         rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1916
1917         rc = rsp->status & PN533_CMD_RET_MASK;
1918         if (rc != PN533_CMD_RET_SUCCESS) {
1919                 nfc_dev_err(&dev->interface->dev,
1920                             "Bringing DEP link up failed %d", rc);
1921                 goto error;
1922         }
1923
1924         if (!dev->tgt_available_prots) {
1925                 struct nfc_target nfc_target;
1926
1927                 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1928
1929                 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1930                 nfc_target.nfcid1_len = 10;
1931                 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1932                 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1933                 if (rc)
1934                         goto error;
1935
1936                 dev->tgt_available_prots = 0;
1937         }
1938
1939         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1940
1941         /* ATR_RES general bytes are located at offset 17 */
1942         target_gt_len = resp->len - 17;
1943         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1944                                           rsp->gt, target_gt_len);
1945         if (rc == 0)
1946                 rc = nfc_dep_link_is_up(dev->nfc_dev,
1947                                         dev->nfc_dev->targets[0].idx,
1948                                         !active, NFC_RF_INITIATOR);
1949
1950 error:
1951         dev_kfree_skb(resp);
1952         return rc;
1953 }
1954
1955 static int pn533_mod_to_baud(struct pn533 *dev)
1956 {
1957         switch (dev->poll_mod_curr) {
1958         case PN533_POLL_MOD_106KBPS_A:
1959                 return 0;
1960         case PN533_POLL_MOD_212KBPS_FELICA:
1961                 return 1;
1962         case PN533_POLL_MOD_424KBPS_FELICA:
1963                 return 2;
1964         default:
1965                 return -EINVAL;
1966         }
1967 }
1968
1969 #define PASSIVE_DATA_LEN 5
1970 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1971                              u8 comm_mode, u8 *gb, size_t gb_len)
1972 {
1973         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1974         struct sk_buff *skb;
1975         int rc, baud, skb_len;
1976         u8 *next, *arg;
1977
1978         u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1979
1980         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1981
1982         if (dev->poll_mod_count) {
1983                 nfc_dev_err(&dev->interface->dev,
1984                             "Cannot bring the DEP link up while polling");
1985                 return -EBUSY;
1986         }
1987
1988         if (dev->tgt_active_prot) {
1989                 nfc_dev_err(&dev->interface->dev,
1990                             "There is already an active target");
1991                 return -EBUSY;
1992         }
1993
1994         baud = pn533_mod_to_baud(dev);
1995         if (baud < 0) {
1996                 nfc_dev_err(&dev->interface->dev,
1997                             "Invalid curr modulation %d", dev->poll_mod_curr);
1998                 return baud;
1999         }
2000
2001         skb_len = 3 + gb_len; /* ActPass + BR + Next */
2002         if (comm_mode == NFC_COMM_PASSIVE)
2003                 skb_len += PASSIVE_DATA_LEN;
2004
2005         skb = pn533_alloc_skb(skb_len);
2006         if (!skb)
2007                 return -ENOMEM;
2008
2009         *skb_put(skb, 1) = !comm_mode;  /* ActPass */
2010         *skb_put(skb, 1) = baud;  /* Baud rate */
2011
2012         next = skb_put(skb, 1);  /* Next */
2013         *next = 0;
2014
2015         if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
2016                 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
2017                        PASSIVE_DATA_LEN);
2018                 *next |= 1;
2019         }
2020
2021         if (gb != NULL && gb_len > 0) {
2022                 memcpy(skb_put(skb, gb_len), gb, gb_len);
2023                 *next |= 4; /* We have some Gi */
2024         } else {
2025                 *next = 0;
2026         }
2027
2028         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2029         if (!arg) {
2030                 dev_kfree_skb(skb);
2031                 return -ENOMEM;
2032         }
2033
2034         *arg = !comm_mode;
2035
2036         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2037                                   pn533_in_dep_link_up_complete, arg);
2038
2039         if (rc < 0) {
2040                 dev_kfree_skb(skb);
2041                 kfree(arg);
2042         }
2043
2044         return rc;
2045 }
2046
2047 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2048 {
2049         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2050
2051         pn533_poll_reset_mod_list(dev);
2052
2053         if (dev->tgt_mode || dev->tgt_active_prot) {
2054                 pn533_send_ack(dev, GFP_KERNEL);
2055                 usb_kill_urb(dev->in_urb);
2056         }
2057
2058         dev->tgt_active_prot = 0;
2059         dev->tgt_mode = 0;
2060
2061         skb_queue_purge(&dev->resp_q);
2062
2063         return 0;
2064 }
2065
2066 struct pn533_data_exchange_arg {
2067         data_exchange_cb_t cb;
2068         void *cb_context;
2069 };
2070
2071 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2072 {
2073         struct sk_buff *skb, *tmp, *t;
2074         unsigned int skb_len = 0, tmp_len = 0;
2075
2076         nfc_dev_dbg(&dev->interface->dev, "%s\n", __func__);
2077
2078         if (skb_queue_empty(&dev->resp_q))
2079                 return NULL;
2080
2081         if (skb_queue_len(&dev->resp_q) == 1) {
2082                 skb = skb_dequeue(&dev->resp_q);
2083                 goto out;
2084         }
2085
2086         skb_queue_walk_safe(&dev->resp_q, tmp, t)
2087                 skb_len += tmp->len;
2088
2089         nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2090                     __func__, skb_len);
2091
2092         skb = alloc_skb(skb_len, GFP_KERNEL);
2093         if (skb == NULL)
2094                 goto out;
2095
2096         skb_put(skb, skb_len);
2097
2098         skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2099                 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2100                 tmp_len += tmp->len;
2101         }
2102
2103 out:
2104         skb_queue_purge(&dev->resp_q);
2105
2106         return skb;
2107 }
2108
2109 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2110                                         struct sk_buff *resp)
2111 {
2112         struct pn533_data_exchange_arg *arg = _arg;
2113         struct sk_buff *skb;
2114         int rc = 0;
2115         u8 status, ret, mi;
2116
2117         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2118
2119         if (IS_ERR(resp)) {
2120                 rc = PTR_ERR(resp);
2121                 goto _error;
2122         }
2123
2124         status = resp->data[0];
2125         ret = status & PN533_CMD_RET_MASK;
2126         mi = status & PN533_CMD_MI_MASK;
2127
2128         skb_pull(resp, sizeof(status));
2129
2130         if (ret != PN533_CMD_RET_SUCCESS) {
2131                 nfc_dev_err(&dev->interface->dev,
2132                             "PN533 reported error %d when exchanging data",
2133                             ret);
2134                 rc = -EIO;
2135                 goto error;
2136         }
2137
2138         skb_queue_tail(&dev->resp_q, resp);
2139
2140         if (mi) {
2141                 dev->cmd_complete_mi_arg = arg;
2142                 queue_work(dev->wq, &dev->mi_work);
2143                 return -EINPROGRESS;
2144         }
2145
2146         skb = pn533_build_response(dev);
2147         if (!skb)
2148                 goto error;
2149
2150         arg->cb(arg->cb_context, skb, 0);
2151         kfree(arg);
2152         return 0;
2153
2154 error:
2155         dev_kfree_skb(resp);
2156 _error:
2157         skb_queue_purge(&dev->resp_q);
2158         arg->cb(arg->cb_context, NULL, rc);
2159         kfree(arg);
2160         return rc;
2161 }
2162
2163 static int pn533_transceive(struct nfc_dev *nfc_dev,
2164                             struct nfc_target *target, struct sk_buff *skb,
2165                             data_exchange_cb_t cb, void *cb_context)
2166 {
2167         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2168         struct pn533_data_exchange_arg *arg = NULL;
2169         int rc;
2170
2171         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2172
2173         if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2174                 /* TODO: Implement support to multi-part data exchange */
2175                 nfc_dev_err(&dev->interface->dev,
2176                             "Data length greater than the max allowed: %d",
2177                             PN533_CMD_DATAEXCH_DATA_MAXLEN);
2178                 rc = -ENOSYS;
2179                 goto error;
2180         }
2181
2182         if (!dev->tgt_active_prot) {
2183                 nfc_dev_err(&dev->interface->dev,
2184                             "Can't exchange data if there is no active target");
2185                 rc = -EINVAL;
2186                 goto error;
2187         }
2188
2189         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2190         if (!arg) {
2191                 rc = -ENOMEM;
2192                 goto error;
2193         }
2194
2195         arg->cb = cb;
2196         arg->cb_context = cb_context;
2197
2198         switch (dev->device_type) {
2199         case PN533_DEVICE_PASORI:
2200                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2201                         rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2202                                                    skb,
2203                                                    pn533_data_exchange_complete,
2204                                                    arg);
2205
2206                         break;
2207                 }
2208         default:
2209                 *skb_push(skb, sizeof(u8)) =  1; /*TG*/
2210
2211                 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2212                                            skb, pn533_data_exchange_complete,
2213                                            arg);
2214
2215                 break;
2216         }
2217
2218         if (rc < 0) /* rc from send_async */
2219                 goto error;
2220
2221         return 0;
2222
2223 error:
2224         kfree(arg);
2225         dev_kfree_skb(skb);
2226         return rc;
2227 }
2228
2229 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2230                                   struct sk_buff *resp)
2231 {
2232         u8 status;
2233
2234         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2235
2236         if (IS_ERR(resp))
2237                 return PTR_ERR(resp);
2238
2239         status = resp->data[0];
2240
2241         dev_kfree_skb(resp);
2242
2243         if (status != 0) {
2244                 nfc_tm_deactivated(dev->nfc_dev);
2245
2246                 dev->tgt_mode = 0;
2247
2248                 return 0;
2249         }
2250
2251         queue_work(dev->wq, &dev->tg_work);
2252
2253         return 0;
2254 }
2255
2256 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2257 {
2258         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2259         int rc;
2260
2261         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2262
2263         if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2264                 nfc_dev_err(&dev->interface->dev,
2265                             "Data length greater than the max allowed: %d",
2266                             PN533_CMD_DATAEXCH_DATA_MAXLEN);
2267                 return -ENOSYS;
2268         }
2269
2270         rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2271                                    pn533_tm_send_complete, NULL);
2272         if (rc < 0)
2273                 dev_kfree_skb(skb);
2274
2275         return rc;
2276 }
2277
2278 static void pn533_wq_mi_recv(struct work_struct *work)
2279 {
2280         struct pn533 *dev = container_of(work, struct pn533, mi_work);
2281
2282         struct sk_buff *skb;
2283         int rc;
2284
2285         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2286
2287         skb = pn533_alloc_skb(PN533_CMD_DATAEXCH_HEAD_LEN);
2288         if (!skb)
2289                 goto error;
2290
2291         switch (dev->device_type) {
2292         case PN533_DEVICE_PASORI:
2293                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2294                         rc = pn533_send_cmd_direct_async(dev,
2295                                                 PN533_CMD_IN_COMM_THRU,
2296                                                 skb,
2297                                                 pn533_data_exchange_complete,
2298                                                  dev->cmd_complete_mi_arg);
2299
2300                         break;
2301                 }
2302         default:
2303                 *skb_put(skb, sizeof(u8)) =  1; /*TG*/
2304
2305                 rc = pn533_send_cmd_direct_async(dev,
2306                                                  PN533_CMD_IN_DATA_EXCHANGE,
2307                                                  skb,
2308                                                  pn533_data_exchange_complete,
2309                                                  dev->cmd_complete_mi_arg);
2310
2311                 break;
2312         }
2313
2314         if (rc == 0) /* success */
2315                 return;
2316
2317         nfc_dev_err(&dev->interface->dev,
2318                     "Error %d when trying to perform data_exchange", rc);
2319
2320         dev_kfree_skb(skb);
2321         kfree(dev->cmd_complete_arg);
2322
2323 error:
2324         pn533_send_ack(dev, GFP_KERNEL);
2325         queue_work(dev->wq, &dev->cmd_work);
2326 }
2327
2328 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2329                                                                 u8 cfgdata_len)
2330 {
2331         struct sk_buff *skb;
2332         struct sk_buff *resp;
2333
2334         int skb_len;
2335
2336         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2337
2338         skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2339
2340         skb = pn533_alloc_skb(skb_len);
2341         if (!skb)
2342                 return -ENOMEM;
2343
2344         *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2345         memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
2346
2347         resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2348         if (IS_ERR(resp))
2349                 return PTR_ERR(resp);
2350
2351         dev_kfree_skb(resp);
2352         return 0;
2353 }
2354
2355 static int pn533_get_firmware_version(struct pn533 *dev,
2356                                       struct pn533_fw_version *fv)
2357 {
2358         struct sk_buff *skb;
2359         struct sk_buff *resp;
2360
2361         skb = pn533_alloc_skb(0);
2362         if (!skb)
2363                 return -ENOMEM;
2364
2365         resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2366         if (IS_ERR(resp))
2367                 return PTR_ERR(resp);
2368
2369         fv->ic = resp->data[0];
2370         fv->ver = resp->data[1];
2371         fv->rev = resp->data[2];
2372         fv->support = resp->data[3];
2373
2374         dev_kfree_skb(resp);
2375         return 0;
2376 }
2377
2378 static int pn533_fw_reset(struct pn533 *dev)
2379 {
2380         struct sk_buff *skb;
2381         struct sk_buff *resp;
2382
2383         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2384
2385         skb = pn533_alloc_skb(sizeof(u8));
2386         if (!skb)
2387                 return -ENOMEM;
2388
2389         *skb_put(skb, sizeof(u8)) = 0x1;
2390
2391         resp = pn533_send_cmd_sync(dev, 0x18, skb);
2392         if (IS_ERR(resp))
2393                 return PTR_ERR(resp);
2394
2395         dev_kfree_skb(resp);
2396
2397         return 0;
2398 }
2399
2400 static struct nfc_ops pn533_nfc_ops = {
2401         .dev_up = NULL,
2402         .dev_down = NULL,
2403         .dep_link_up = pn533_dep_link_up,
2404         .dep_link_down = pn533_dep_link_down,
2405         .start_poll = pn533_start_poll,
2406         .stop_poll = pn533_stop_poll,
2407         .activate_target = pn533_activate_target,
2408         .deactivate_target = pn533_deactivate_target,
2409         .im_transceive = pn533_transceive,
2410         .tm_send = pn533_tm_send,
2411 };
2412
2413 static int pn533_setup(struct pn533 *dev)
2414 {
2415         struct pn533_config_max_retries max_retries;
2416         struct pn533_config_timing timing;
2417         u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2418         int rc;
2419
2420         switch (dev->device_type) {
2421         case PN533_DEVICE_STD:
2422                 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2423                 max_retries.mx_rty_psl = 2;
2424                 max_retries.mx_rty_passive_act =
2425                         PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2426
2427                 timing.rfu = PN533_CONFIG_TIMING_102;
2428                 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2429                 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2430
2431                 break;
2432
2433         case PN533_DEVICE_PASORI:
2434                 max_retries.mx_rty_atr = 0x2;
2435                 max_retries.mx_rty_psl = 0x1;
2436                 max_retries.mx_rty_passive_act =
2437                         PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2438
2439                 timing.rfu = PN533_CONFIG_TIMING_102;
2440                 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2441                 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2442
2443                 break;
2444
2445         default:
2446                 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2447                             dev->device_type);
2448                 return -EINVAL;
2449         }
2450
2451         rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2452                                      (u8 *)&max_retries, sizeof(max_retries));
2453         if (rc) {
2454                 nfc_dev_err(&dev->interface->dev,
2455                             "Error on setting MAX_RETRIES config");
2456                 return rc;
2457         }
2458
2459
2460         rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2461                                      (u8 *)&timing, sizeof(timing));
2462         if (rc) {
2463                 nfc_dev_err(&dev->interface->dev,
2464                             "Error on setting RF timings");
2465                 return rc;
2466         }
2467
2468         switch (dev->device_type) {
2469         case PN533_DEVICE_STD:
2470                 break;
2471
2472         case PN533_DEVICE_PASORI:
2473                 pn533_fw_reset(dev);
2474
2475                 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2476                                              pasori_cfg, 3);
2477                 if (rc) {
2478                         nfc_dev_err(&dev->interface->dev,
2479                                     "Error while settings PASORI config");
2480                         return rc;
2481                 }
2482
2483                 pn533_fw_reset(dev);
2484
2485                 break;
2486         }
2487
2488         return 0;
2489 }
2490
2491 static int pn533_probe(struct usb_interface *interface,
2492                         const struct usb_device_id *id)
2493 {
2494         struct pn533_fw_version fw_ver;
2495         struct pn533 *dev;
2496         struct usb_host_interface *iface_desc;
2497         struct usb_endpoint_descriptor *endpoint;
2498         int in_endpoint = 0;
2499         int out_endpoint = 0;
2500         int rc = -ENOMEM;
2501         int i;
2502         u32 protocols;
2503
2504         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2505         if (!dev)
2506                 return -ENOMEM;
2507
2508         dev->udev = usb_get_dev(interface_to_usbdev(interface));
2509         dev->interface = interface;
2510         mutex_init(&dev->cmd_lock);
2511
2512         iface_desc = interface->cur_altsetting;
2513         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2514                 endpoint = &iface_desc->endpoint[i].desc;
2515
2516                 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
2517                         in_endpoint = endpoint->bEndpointAddress;
2518
2519                 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
2520                         out_endpoint = endpoint->bEndpointAddress;
2521         }
2522
2523         if (!in_endpoint || !out_endpoint) {
2524                 nfc_dev_err(&interface->dev,
2525                             "Could not find bulk-in or bulk-out endpoint");
2526                 rc = -ENODEV;
2527                 goto error;
2528         }
2529
2530         dev->in_frame = kmalloc(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
2531         dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
2532         dev->out_frame = kmalloc(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
2533         dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2534
2535         if (!dev->in_frame || !dev->out_frame || !dev->in_urb || !dev->out_urb)
2536                 goto error;
2537
2538         usb_fill_bulk_urb(dev->in_urb, dev->udev,
2539                           usb_rcvbulkpipe(dev->udev, in_endpoint),
2540                           NULL, 0, NULL, dev);
2541         usb_fill_bulk_urb(dev->out_urb, dev->udev,
2542                           usb_sndbulkpipe(dev->udev, out_endpoint),
2543                           NULL, 0, pn533_send_complete, dev);
2544
2545         INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2546         INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
2547         INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
2548         INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
2549         INIT_WORK(&dev->poll_work, pn533_wq_poll);
2550         dev->wq = alloc_ordered_workqueue("pn533", 0);
2551         if (dev->wq == NULL)
2552                 goto error;
2553
2554         init_timer(&dev->listen_timer);
2555         dev->listen_timer.data = (unsigned long) dev;
2556         dev->listen_timer.function = pn533_listen_mode_timer;
2557
2558         skb_queue_head_init(&dev->resp_q);
2559
2560         INIT_LIST_HEAD(&dev->cmd_queue);
2561
2562         usb_set_intfdata(interface, dev);
2563
2564         memset(&fw_ver, 0, sizeof(fw_ver));
2565         rc = pn533_get_firmware_version(dev, &fw_ver);
2566         if (rc < 0)
2567                 goto destroy_wq;
2568
2569         nfc_dev_info(&dev->interface->dev,
2570                      "NXP PN533 firmware ver %d.%d now attached",
2571                      fw_ver.ver, fw_ver.rev);
2572
2573         dev->device_type = id->driver_info;
2574         switch (dev->device_type) {
2575         case PN533_DEVICE_STD:
2576                 protocols = PN533_ALL_PROTOCOLS;
2577                 break;
2578
2579         case PN533_DEVICE_PASORI:
2580                 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2581                 break;
2582
2583         default:
2584                 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2585                             dev->device_type);
2586                 rc = -EINVAL;
2587                 goto destroy_wq;
2588         }
2589
2590         dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2591                                            PN533_FRAME_HEADER_LEN +
2592                                            PN533_CMD_DATAEXCH_HEAD_LEN,
2593                                            PN533_FRAME_TAIL_LEN);
2594         if (!dev->nfc_dev)
2595                 goto destroy_wq;
2596
2597         nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2598         nfc_set_drvdata(dev->nfc_dev, dev);
2599
2600         rc = nfc_register_device(dev->nfc_dev);
2601         if (rc)
2602                 goto free_nfc_dev;
2603
2604         rc = pn533_setup(dev);
2605         if (rc)
2606                 goto unregister_nfc_dev;
2607
2608         return 0;
2609
2610 unregister_nfc_dev:
2611         nfc_unregister_device(dev->nfc_dev);
2612
2613 free_nfc_dev:
2614         nfc_free_device(dev->nfc_dev);
2615
2616 destroy_wq:
2617         destroy_workqueue(dev->wq);
2618 error:
2619         kfree(dev->in_frame);
2620         usb_free_urb(dev->in_urb);
2621         kfree(dev->out_frame);
2622         usb_free_urb(dev->out_urb);
2623         kfree(dev);
2624         return rc;
2625 }
2626
2627 static void pn533_disconnect(struct usb_interface *interface)
2628 {
2629         struct pn533 *dev;
2630         struct pn533_cmd *cmd, *n;
2631
2632         dev = usb_get_intfdata(interface);
2633         usb_set_intfdata(interface, NULL);
2634
2635         nfc_unregister_device(dev->nfc_dev);
2636         nfc_free_device(dev->nfc_dev);
2637
2638         usb_kill_urb(dev->in_urb);
2639         usb_kill_urb(dev->out_urb);
2640
2641         destroy_workqueue(dev->wq);
2642
2643         skb_queue_purge(&dev->resp_q);
2644
2645         del_timer(&dev->listen_timer);
2646
2647         list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2648                 list_del(&cmd->queue);
2649                 kfree(cmd);
2650         }
2651
2652         kfree(dev->in_frame);
2653         usb_free_urb(dev->in_urb);
2654         kfree(dev->out_frame);
2655         usb_free_urb(dev->out_urb);
2656         kfree(dev);
2657
2658         nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
2659 }
2660
2661 static struct usb_driver pn533_driver = {
2662         .name =         "pn533",
2663         .probe =        pn533_probe,
2664         .disconnect =   pn533_disconnect,
2665         .id_table =     pn533_table,
2666 };
2667
2668 module_usb_driver(pn533_driver);
2669
2670 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
2671                         " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2672 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2673 MODULE_VERSION(VERSION);
2674 MODULE_LICENSE("GPL");