drivers/nfc/pn533.c

   1 /*
   2  * Copyright (C) 2011 Instituto Nokia de Tecnologia
   3  * Copyright (C) 2012-2013 Tieto Poland
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the
  17  * Free Software Foundation, Inc.,
  18  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include <linux/device.h>
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/slab.h>
  25 #include <linux/usb.h>
  26 #include <linux/nfc.h>
  27 #include <linux/netdevice.h>
  28 #include <net/nfc/nfc.h>
  29
  30 #define VERSION "0.2"
  31
  32 #define PN533_VENDOR_ID 0x4CC
  33 #define PN533_PRODUCT_ID 0x2533
  34
  35 #define SCM_VENDOR_ID 0x4E6
  36 #define SCL3711_PRODUCT_ID 0x5591
  37
  38 #define SONY_VENDOR_ID         0x054c
  39 #define PASORI_PRODUCT_ID      0x02e1
  40
  41 #define ACS_VENDOR_ID 0x072f
  42 #define ACR122U_PRODUCT_ID 0x2200
  43
  44 #define PN533_DEVICE_STD     0x1
  45 #define PN533_DEVICE_PASORI  0x2
  46 #define PN533_DEVICE_ACR122U 0x3
  47
  48 #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
  49                              NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
  50                              NFC_PROTO_NFC_DEP_MASK |\
  51                              NFC_PROTO_ISO14443_B_MASK)
  52
  53 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
  54                                    NFC_PROTO_MIFARE_MASK | \
  55                                    NFC_PROTO_FELICA_MASK | \
  56                                    NFC_PROTO_ISO14443_MASK | \
  57                                    NFC_PROTO_NFC_DEP_MASK)
  58
  59 static const struct usb_device_id pn533_table[] = {
  60         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  61           .idVendor             = PN533_VENDOR_ID,
  62           .idProduct            = PN533_PRODUCT_ID,
  63           .driver_info          = PN533_DEVICE_STD,
  64         },
  65         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  66           .idVendor             = SCM_VENDOR_ID,
  67           .idProduct            = SCL3711_PRODUCT_ID,
  68           .driver_info          = PN533_DEVICE_STD,
  69         },
  70         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  71           .idVendor             = SONY_VENDOR_ID,
  72           .idProduct            = PASORI_PRODUCT_ID,
  73           .driver_info          = PN533_DEVICE_PASORI,
  74         },
  75         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  76           .idVendor             = ACS_VENDOR_ID,
  77           .idProduct            = ACR122U_PRODUCT_ID,
  78           .driver_info          = PN533_DEVICE_ACR122U,
  79         },
  80         { }
  81 };
  82 MODULE_DEVICE_TABLE(usb, pn533_table);
  83
  84 /* How much time we spend listening for initiators */
  85 #define PN533_LISTEN_TIME 2
  86 /* Delay between each poll frame (ms) */
  87 #define PN533_POLL_INTERVAL 10
  88
  89 /* Standard pn533 frame definitions (standard and extended)*/
  90 #define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
  91                                         + 2) /* data[0] TFI, data[1] CC */
  92 #define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
  93
  94 #define PN533_EXT_FRAME_HEADER_LEN (sizeof(struct pn533_ext_frame) \
  95                                         + 2) /* data[0] TFI, data[1] CC */
  96
  97 #define PN533_CMD_DATAEXCH_DATA_MAXLEN  262
  98 #define PN533_CMD_DATAFRAME_MAXLEN      240     /* max data length (send) */
  99
 100 /*
 101  * Max extended frame payload len, excluding TFI and CC
 102  * which are already in PN533_FRAME_HEADER_LEN.
 103  */
 104 #define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
 105
 106 #define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
 107                                   Postamble (1) */
 108 #define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
 109 #define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
 110 /* Half start code (3), LEN (4) should be 0xffff for extended frame */
 111 #define PN533_STD_IS_EXTENDED(hdr) ((hdr)->datalen == 0xFF \
 112                                         && (hdr)->datalen_checksum == 0xFF)
 113 #define PN533_EXT_FRAME_CHECKSUM(f) (f->data[be16_to_cpu(f->datalen)])
 114
 115 /* start of frame */
 116 #define PN533_STD_FRAME_SOF 0x00FF
 117
 118 /* standard frame identifier: in/out/error */
 119 #define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
 120 #define PN533_STD_FRAME_DIR_OUT 0xD4
 121 #define PN533_STD_FRAME_DIR_IN 0xD5
 122
 123 /* ACS ACR122 pn533 frame definitions */
 124 #define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
 125                                           + 2)
 126 #define PN533_ACR122_TX_FRAME_TAIL_LEN 0
 127 #define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
 128                                           + 2)
 129 #define PN533_ACR122_RX_FRAME_TAIL_LEN 2
 130 #define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
 131
 132 /* CCID messages types */
 133 #define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
 134 #define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
 135
 136 #define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
 137
 138 /* PN533 Commands */
 139 #define PN533_FRAME_CMD(f) (f->data[1])
 140
 141 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
 142 #define PN533_CMD_RF_CONFIGURATION 0x32
 143 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
 144 #define PN533_CMD_IN_COMM_THRU     0x42
 145 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
 146 #define PN533_CMD_IN_ATR 0x50
 147 #define PN533_CMD_IN_RELEASE 0x52
 148 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
 149
 150 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
 151 #define PN533_CMD_TG_GET_DATA 0x86
 152 #define PN533_CMD_TG_SET_DATA 0x8e
 153 #define PN533_CMD_UNDEF 0xff
 154
 155 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
 156
 157 /* PN533 Return codes */
 158 #define PN533_CMD_RET_MASK 0x3F
 159 #define PN533_CMD_MI_MASK 0x40
 160 #define PN533_CMD_RET_SUCCESS 0x00
 161
 162 struct pn533;
 163
 164 typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
 165                                         struct sk_buff *resp);
 166
 167 /* structs for pn533 commands */
 168
 169 /* PN533_CMD_GET_FIRMWARE_VERSION */
 170 struct pn533_fw_version {
 171         u8 ic;
 172         u8 ver;
 173         u8 rev;
 174         u8 support;
 175 };
 176
 177 /* PN533_CMD_RF_CONFIGURATION */
 178 #define PN533_CFGITEM_RF_FIELD    0x01
 179 #define PN533_CFGITEM_TIMING      0x02
 180 #define PN533_CFGITEM_MAX_RETRIES 0x05
 181 #define PN533_CFGITEM_PASORI      0x82
 182
 183 #define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
 184 #define PN533_CFGITEM_RF_FIELD_ON        0x1
 185 #define PN533_CFGITEM_RF_FIELD_OFF       0x0
 186
 187 #define PN533_CONFIG_TIMING_102 0xb
 188 #define PN533_CONFIG_TIMING_204 0xc
 189 #define PN533_CONFIG_TIMING_409 0xd
 190 #define PN533_CONFIG_TIMING_819 0xe
 191
 192 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
 193 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
 194
 195 struct pn533_config_max_retries {
 196         u8 mx_rty_atr;
 197         u8 mx_rty_psl;
 198         u8 mx_rty_passive_act;
 199 } __packed;
 200
 201 struct pn533_config_timing {
 202         u8 rfu;
 203         u8 atr_res_timeout;
 204         u8 dep_timeout;
 205 } __packed;
 206
 207 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
 208
 209 /* felica commands opcode */
 210 #define PN533_FELICA_OPC_SENSF_REQ 0
 211 #define PN533_FELICA_OPC_SENSF_RES 1
 212 /* felica SENSF_REQ parameters */
 213 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
 214 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
 215 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
 216 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
 217
 218 /* type B initiator_data values */
 219 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
 220 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
 221 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
 222
 223 union pn533_cmd_poll_initdata {
 224         struct {
 225                 u8 afi;
 226                 u8 polling_method;
 227         } __packed type_b;
 228         struct {
 229                 u8 opcode;
 230                 __be16 sc;
 231                 u8 rc;
 232                 u8 tsn;
 233         } __packed felica;
 234 };
 235
 236 /* Poll modulations */
 237 enum {
 238         PN533_POLL_MOD_106KBPS_A,
 239         PN533_POLL_MOD_212KBPS_FELICA,
 240         PN533_POLL_MOD_424KBPS_FELICA,
 241         PN533_POLL_MOD_106KBPS_JEWEL,
 242         PN533_POLL_MOD_847KBPS_B,
 243         PN533_LISTEN_MOD,
 244
 245         __PN533_POLL_MOD_AFTER_LAST,
 246 };
 247 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
 248
 249 struct pn533_poll_modulations {
 250         struct {
 251                 u8 maxtg;
 252                 u8 brty;
 253                 union pn533_cmd_poll_initdata initiator_data;
 254         } __packed data;
 255         u8 len;
 256 };
 257
 258 static const struct pn533_poll_modulations poll_mod[] = {
 259         [PN533_POLL_MOD_106KBPS_A] = {
 260                 .data = {
 261                         .maxtg = 1,
 262                         .brty = 0,
 263                 },
 264                 .len = 2,
 265         },
 266         [PN533_POLL_MOD_212KBPS_FELICA] = {
 267                 .data = {
 268                         .maxtg = 1,
 269                         .brty = 1,
 270                         .initiator_data.felica = {
 271                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 272                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 273                                 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
 274                                 .tsn = 0x03,
 275                         },
 276                 },
 277                 .len = 7,
 278         },
 279         [PN533_POLL_MOD_424KBPS_FELICA] = {
 280                 .data = {
 281                         .maxtg = 1,
 282                         .brty = 2,
 283                         .initiator_data.felica = {
 284                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 285                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 286                                 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
 287                                 .tsn = 0x03,
 288                         },
 289                  },
 290                 .len = 7,
 291         },
 292         [PN533_POLL_MOD_106KBPS_JEWEL] = {
 293                 .data = {
 294                         .maxtg = 1,
 295                         .brty = 4,
 296                 },
 297                 .len = 2,
 298         },
 299         [PN533_POLL_MOD_847KBPS_B] = {
 300                 .data = {
 301                         .maxtg = 1,
 302                         .brty = 8,
 303                         .initiator_data.type_b = {
 304                                 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
 305                                 .polling_method =
 306                                         PN533_TYPE_B_POLL_METHOD_TIMESLOT,
 307                         },
 308                 },
 309                 .len = 3,
 310         },
 311         [PN533_LISTEN_MOD] = {
 312                 .len = 0,
 313         },
 314 };
 315
 316 /* PN533_CMD_IN_ATR */
 317
 318 struct pn533_cmd_activate_response {
 319         u8 status;
 320         u8 nfcid3t[10];
 321         u8 didt;
 322         u8 bst;
 323         u8 brt;
 324         u8 to;
 325         u8 ppt;
 326         /* optional */
 327         u8 gt[];
 328 } __packed;
 329
 330 struct pn533_cmd_jump_dep_response {
 331         u8 status;
 332         u8 tg;
 333         u8 nfcid3t[10];
 334         u8 didt;
 335         u8 bst;
 336         u8 brt;
 337         u8 to;
 338         u8 ppt;
 339         /* optional */
 340         u8 gt[];
 341 } __packed;
 342
 343
 344 /* PN533_TG_INIT_AS_TARGET */
 345 #define PN533_INIT_TARGET_PASSIVE 0x1
 346 #define PN533_INIT_TARGET_DEP 0x2
 347
 348 #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
 349 #define PN533_INIT_TARGET_RESP_ACTIVE     0x1
 350 #define PN533_INIT_TARGET_RESP_DEP        0x4
 351
 352 enum  pn533_protocol_type {
 353         PN533_PROTO_REQ_ACK_RESP = 0,
 354         PN533_PROTO_REQ_RESP
 355 };
 356
 357 struct pn533 {
 358         struct usb_device *udev;
 359         struct usb_interface *interface;
 360         struct nfc_dev *nfc_dev;
 361         u32 device_type;
 362         enum pn533_protocol_type protocol_type;
 363
 364         struct urb *out_urb;
 365         struct urb *in_urb;
 366
 367         struct sk_buff_head resp_q;
 368         struct sk_buff_head fragment_skb;
 369
 370         struct workqueue_struct *wq;
 371         struct work_struct cmd_work;
 372         struct work_struct cmd_complete_work;
 373         struct delayed_work poll_work;
 374         struct work_struct mi_rx_work;
 375         struct work_struct mi_tx_work;
 376         struct work_struct tg_work;
 377         struct work_struct rf_work;
 378
 379         struct list_head cmd_queue;
 380         struct pn533_cmd *cmd;
 381         u8 cmd_pending;
 382         struct mutex cmd_lock;  /* protects cmd queue */
 383
 384         void *cmd_complete_mi_arg;
 385         void *cmd_complete_dep_arg;
 386
 387         struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
 388         u8 poll_mod_count;
 389         u8 poll_mod_curr;
 390         u8 poll_dep;
 391         u32 poll_protocols;
 392         u32 listen_protocols;
 393         struct timer_list listen_timer;
 394         int cancel_listen;
 395
 396         u8 *gb;
 397         size_t gb_len;
 398
 399         u8 tgt_available_prots;
 400         u8 tgt_active_prot;
 401         u8 tgt_mode;
 402
 403         struct pn533_frame_ops *ops;
 404 };
 405
 406 struct pn533_cmd {
 407         struct list_head queue;
 408         u8 code;
 409         int status;
 410         struct sk_buff *req;
 411         struct sk_buff *resp;
 412         int resp_len;
 413         pn533_send_async_complete_t  complete_cb;
 414         void *complete_cb_context;
 415 };
 416
 417 struct pn533_std_frame {
 418         u8 preamble;
 419         __be16 start_frame;
 420         u8 datalen;
 421         u8 datalen_checksum;
 422         u8 data[];
 423 } __packed;
 424
 425 struct pn533_ext_frame {        /* Extended Information frame */
 426         u8 preamble;
 427         __be16 start_frame;
 428         __be16 eif_flag;        /* fixed to 0xFFFF */
 429         __be16 datalen;
 430         u8 datalen_checksum;
 431         u8 data[];
 432 } __packed;
 433
 434 struct pn533_frame_ops {
 435         void (*tx_frame_init)(void *frame, u8 cmd_code);
 436         void (*tx_frame_finish)(void *frame);
 437         void (*tx_update_payload_len)(void *frame, int len);
 438         int tx_header_len;
 439         int tx_tail_len;
 440
 441         bool (*rx_is_frame_valid)(void *frame, struct pn533 *dev);
 442         int (*rx_frame_size)(void *frame);
 443         int rx_header_len;
 444         int rx_tail_len;
 445
 446         int max_payload_len;
 447         u8 (*get_cmd_code)(void *frame);
 448 };
 449
 450 struct pn533_acr122_ccid_hdr {
 451         u8 type;
 452         u32 datalen;
 453         u8 slot;
 454         u8 seq;
 455         u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
 456                          byte for reposnse msg */
 457         u8 data[]; /* payload */
 458 } __packed;
 459
 460 struct pn533_acr122_apdu_hdr {
 461         u8 class;
 462         u8 ins;
 463         u8 p1;
 464         u8 p2;
 465 } __packed;
 466
 467 struct pn533_acr122_tx_frame {
 468         struct pn533_acr122_ccid_hdr ccid;
 469         struct pn533_acr122_apdu_hdr apdu;
 470         u8 datalen;
 471         u8 data[]; /* pn533 frame: TFI ... */
 472 } __packed;
 473
 474 struct pn533_acr122_rx_frame {
 475         struct pn533_acr122_ccid_hdr ccid;
 476         u8 data[]; /* pn533 frame : TFI ... */
 477 } __packed;
 478
 479 static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
 480 {
 481         struct pn533_acr122_tx_frame *frame = _frame;
 482
 483         frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
 484         frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
 485                                                           sizeof(datalen) */
 486         frame->ccid.slot = 0;
 487         frame->ccid.seq = 0;
 488         frame->ccid.params[0] = 0;
 489         frame->ccid.params[1] = 0;
 490         frame->ccid.params[2] = 0;
 491
 492         frame->data[0] = PN533_STD_FRAME_DIR_OUT;
 493         frame->data[1] = cmd_code;
 494         frame->datalen = 2;  /* data[0] + data[1] */
 495
 496         frame->apdu.class = 0xFF;
 497         frame->apdu.ins = 0;
 498         frame->apdu.p1 = 0;
 499         frame->apdu.p2 = 0;
 500 }
 501
 502 static void pn533_acr122_tx_frame_finish(void *_frame)
 503 {
 504         struct pn533_acr122_tx_frame *frame = _frame;
 505
 506         frame->ccid.datalen += frame->datalen;
 507 }
 508
 509 static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
 510 {
 511         struct pn533_acr122_tx_frame *frame = _frame;
 512
 513         frame->datalen += len;
 514 }
 515
 516 static bool pn533_acr122_is_rx_frame_valid(void *_frame, struct pn533 *dev)
 517 {
 518         struct pn533_acr122_rx_frame *frame = _frame;
 519
 520         if (frame->ccid.type != 0x83)
 521                 return false;
 522
 523         if (frame->data[frame->ccid.datalen - 2] == 0x63)
 524                 return false;
 525
 526         return true;
 527 }
 528
 529 static int pn533_acr122_rx_frame_size(void *frame)
 530 {
 531         struct pn533_acr122_rx_frame *f = frame;
 532
 533         /* f->ccid.datalen already includes tail length */
 534         return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
 535 }
 536
 537 static u8 pn533_acr122_get_cmd_code(void *frame)
 538 {
 539         struct pn533_acr122_rx_frame *f = frame;
 540
 541         return PN533_FRAME_CMD(f);
 542 }
 543
 544 static struct pn533_frame_ops pn533_acr122_frame_ops = {
 545         .tx_frame_init = pn533_acr122_tx_frame_init,
 546         .tx_frame_finish = pn533_acr122_tx_frame_finish,
 547         .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
 548         .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
 549         .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
 550
 551         .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
 552         .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
 553         .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
 554         .rx_frame_size = pn533_acr122_rx_frame_size,
 555
 556         .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
 557         .get_cmd_code = pn533_acr122_get_cmd_code,
 558 };
 559
 560 /* The rule: value(high byte) + value(low byte) + checksum = 0 */
 561 static inline u8 pn533_ext_checksum(u16 value)
 562 {
 563         return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
 564 }
 565
 566 /* The rule: value + checksum = 0 */
 567 static inline u8 pn533_std_checksum(u8 value)
 568 {
 569         return ~value + 1;
 570 }
 571
 572 /* The rule: sum(data elements) + checksum = 0 */
 573 static u8 pn533_std_data_checksum(u8 *data, int datalen)
 574 {
 575         u8 sum = 0;
 576         int i;
 577
 578         for (i = 0; i < datalen; i++)
 579                 sum += data[i];
 580
 581         return pn533_std_checksum(sum);
 582 }
 583
 584 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
 585 {
 586         struct pn533_std_frame *frame = _frame;
 587
 588         frame->preamble = 0;
 589         frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
 590         PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
 591         PN533_FRAME_CMD(frame) = cmd_code;
 592         frame->datalen = 2;
 593 }
 594
 595 static void pn533_std_tx_frame_finish(void *_frame)
 596 {
 597         struct pn533_std_frame *frame = _frame;
 598
 599         frame->datalen_checksum = pn533_std_checksum(frame->datalen);
 600
 601         PN533_STD_FRAME_CHECKSUM(frame) =
 602                 pn533_std_data_checksum(frame->data, frame->datalen);
 603
 604         PN533_STD_FRAME_POSTAMBLE(frame) = 0;
 605 }
 606
 607 static void pn533_std_tx_update_payload_len(void *_frame, int len)
 608 {
 609         struct pn533_std_frame *frame = _frame;
 610
 611         frame->datalen += len;
 612 }
 613
 614 static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
 615 {
 616         u8 checksum;
 617         struct pn533_std_frame *stdf = _frame;
 618
 619         if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
 620                 return false;
 621
 622         if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
 623                 /* Standard frame code */
 624                 dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
 625
 626                 checksum = pn533_std_checksum(stdf->datalen);
 627                 if (checksum != stdf->datalen_checksum)
 628                         return false;
 629
 630                 checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
 631                 if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
 632                         return false;
 633         } else {
 634                 /* Extended */
 635                 struct pn533_ext_frame *eif = _frame;
 636
 637                 dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
 638
 639                 checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
 640                 if (checksum != eif->datalen_checksum)
 641                         return false;
 642
 643                 /* check data checksum */
 644                 checksum = pn533_std_data_checksum(eif->data,
 645                                                    be16_to_cpu(eif->datalen));
 646                 if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
 647                         return false;
 648         }
 649
 650         return true;
 651 }
 652
 653 static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
 654 {
 655         if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
 656                 return false;
 657
 658         if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
 659                 return false;
 660
 661         return true;
 662 }
 663
 664 static inline int pn533_std_rx_frame_size(void *frame)
 665 {
 666         struct pn533_std_frame *f = frame;
 667
 668         /* check for Extended Information frame */
 669         if (PN533_STD_IS_EXTENDED(f)) {
 670                 struct pn533_ext_frame *eif = frame;
 671
 672                 return sizeof(struct pn533_ext_frame)
 673                         + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
 674         }
 675
 676         return sizeof(struct pn533_std_frame) + f->datalen +
 677                PN533_STD_FRAME_TAIL_LEN;
 678 }
 679
 680 static u8 pn533_std_get_cmd_code(void *frame)
 681 {
 682         struct pn533_std_frame *f = frame;
 683         struct pn533_ext_frame *eif = frame;
 684
 685         if (PN533_STD_IS_EXTENDED(f))
 686                 return PN533_FRAME_CMD(eif);
 687         else
 688                 return PN533_FRAME_CMD(f);
 689 }
 690
 691 static struct pn533_frame_ops pn533_std_frame_ops = {
 692         .tx_frame_init = pn533_std_tx_frame_init,
 693         .tx_frame_finish = pn533_std_tx_frame_finish,
 694         .tx_update_payload_len = pn533_std_tx_update_payload_len,
 695         .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
 696         .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
 697
 698         .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
 699         .rx_frame_size = pn533_std_rx_frame_size,
 700         .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
 701         .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
 702
 703         .max_payload_len =  PN533_STD_FRAME_MAX_PAYLOAD_LEN,
 704         .get_cmd_code = pn533_std_get_cmd_code,
 705 };
 706
 707 static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
 708 {
 709         return (dev->ops->get_cmd_code(frame) ==
 710                                 PN533_CMD_RESPONSE(dev->cmd->code));
 711 }
 712
 713 static void pn533_recv_response(struct urb *urb)
 714 {
 715         struct pn533 *dev = urb->context;
 716         struct pn533_cmd *cmd = dev->cmd;
 717         u8 *in_frame;
 718
 719         cmd->status = urb->status;
 720
 721         switch (urb->status) {
 722         case 0:
 723                 break; /* success */
 724         case -ECONNRESET:
 725         case -ENOENT:
 726                 dev_dbg(&dev->interface->dev,
 727                         "The urb has been canceled (status %d)\n",
 728                         urb->status);
 729                 goto sched_wq;
 730         case -ESHUTDOWN:
 731         default:
 732                 nfc_err(&dev->interface->dev,
 733                         "Urb failure (status %d)\n", urb->status);
 734                 goto sched_wq;
 735         }
 736
 737         in_frame = dev->in_urb->transfer_buffer;
 738
 739         dev_dbg(&dev->interface->dev, "Received a frame\n");
 740         print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
 741                              dev->ops->rx_frame_size(in_frame), false);
 742
 743         if (!dev->ops->rx_is_frame_valid(in_frame, dev)) {
 744                 nfc_err(&dev->interface->dev, "Received an invalid frame\n");
 745                 cmd->status = -EIO;
 746                 goto sched_wq;
 747         }
 748
 749         if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
 750                 nfc_err(&dev->interface->dev,
 751                         "It it not the response to the last command\n");
 752                 cmd->status = -EIO;
 753                 goto sched_wq;
 754         }
 755
 756 sched_wq:
 757         queue_work(dev->wq, &dev->cmd_complete_work);
 758 }
 759
 760 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
 761 {
 762         dev->in_urb->complete = pn533_recv_response;
 763
 764         return usb_submit_urb(dev->in_urb, flags);
 765 }
 766
 767 static void pn533_recv_ack(struct urb *urb)
 768 {
 769         struct pn533 *dev = urb->context;
 770         struct pn533_cmd *cmd = dev->cmd;
 771         struct pn533_std_frame *in_frame;
 772         int rc;
 773
 774         cmd->status = urb->status;
 775
 776         switch (urb->status) {
 777         case 0:
 778                 break; /* success */
 779         case -ECONNRESET:
 780         case -ENOENT:
 781                 dev_dbg(&dev->interface->dev,
 782                         "The urb has been stopped (status %d)\n",
 783                         urb->status);
 784                 goto sched_wq;
 785         case -ESHUTDOWN:
 786         default:
 787                 nfc_err(&dev->interface->dev,
 788                         "Urb failure (status %d)\n", urb->status);
 789                 goto sched_wq;
 790         }
 791
 792         in_frame = dev->in_urb->transfer_buffer;
 793
 794         if (!pn533_std_rx_frame_is_ack(in_frame)) {
 795                 nfc_err(&dev->interface->dev, "Received an invalid ack\n");
 796                 cmd->status = -EIO;
 797                 goto sched_wq;
 798         }
 799
 800         rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
 801         if (rc) {
 802                 nfc_err(&dev->interface->dev,
 803                         "usb_submit_urb failed with result %d\n", rc);
 804                 cmd->status = rc;
 805                 goto sched_wq;
 806         }
 807
 808         return;
 809
 810 sched_wq:
 811         queue_work(dev->wq, &dev->cmd_complete_work);
 812 }
 813
 814 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
 815 {
 816         dev->in_urb->complete = pn533_recv_ack;
 817
 818         return usb_submit_urb(dev->in_urb, flags);
 819 }
 820
 821 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
 822 {
 823         u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
 824         /* spec 7.1.1.3:  Preamble, SoPC (2), ACK Code (2), Postamble */
 825         int rc;
 826
 827         dev->out_urb->transfer_buffer = ack;
 828         dev->out_urb->transfer_buffer_length = sizeof(ack);
 829         rc = usb_submit_urb(dev->out_urb, flags);
 830
 831         return rc;
 832 }
 833
 834 static int __pn533_send_frame_async(struct pn533 *dev,
 835                                         struct sk_buff *out,
 836                                         struct sk_buff *in,
 837                                         int in_len)
 838 {
 839         int rc;
 840
 841         dev->out_urb->transfer_buffer = out->data;
 842         dev->out_urb->transfer_buffer_length = out->len;
 843
 844         dev->in_urb->transfer_buffer = in->data;
 845         dev->in_urb->transfer_buffer_length = in_len;
 846
 847         print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
 848                              out->data, out->len, false);
 849
 850         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
 851         if (rc)
 852                 return rc;
 853
 854         if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
 855                 /* request for response for sent packet directly */
 856                 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
 857                 if (rc)
 858                         goto error;
 859         } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
 860                 /* request for ACK if that's the case */
 861                 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
 862                 if (rc)
 863                         goto error;
 864         }
 865
 866         return 0;
 867
 868 error:
 869         usb_unlink_urb(dev->out_urb);
 870         return rc;
 871 }
 872
 873 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
 874                                   struct sk_buff *skb)
 875 {
 876         /* payload is already there, just update datalen */
 877         int payload_len = skb->len;
 878         struct pn533_frame_ops *ops = dev->ops;
 879
 880
 881         skb_push(skb, ops->tx_header_len);
 882         skb_put(skb, ops->tx_tail_len);
 883
 884         ops->tx_frame_init(skb->data, cmd_code);
 885         ops->tx_update_payload_len(skb->data, payload_len);
 886         ops->tx_frame_finish(skb->data);
 887 }
 888
 889 static int pn533_send_async_complete(struct pn533 *dev)
 890 {
 891         struct pn533_cmd *cmd = dev->cmd;
 892         int status = cmd->status;
 893
 894         struct sk_buff *req = cmd->req;
 895         struct sk_buff *resp = cmd->resp;
 896
 897         int rc;
 898
 899         dev_kfree_skb(req);
 900
 901         if (status < 0) {
 902                 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
 903                                       ERR_PTR(status));
 904                 dev_kfree_skb(resp);
 905                 goto done;
 906         }
 907
 908         skb_put(resp, dev->ops->rx_frame_size(resp->data));
 909         skb_pull(resp, dev->ops->rx_header_len);
 910         skb_trim(resp, resp->len - dev->ops->rx_tail_len);
 911
 912         rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
 913
 914 done:
 915         kfree(cmd);
 916         dev->cmd = NULL;
 917         return rc;
 918 }
 919
 920 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
 921                               struct sk_buff *req, struct sk_buff *resp,
 922                               int resp_len,
 923                               pn533_send_async_complete_t complete_cb,
 924                               void *complete_cb_context)
 925 {
 926         struct pn533_cmd *cmd;
 927         int rc = 0;
 928
 929         dev_dbg(&dev->interface->dev, "Sending command 0x%x\n", cmd_code);
 930
 931         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 932         if (!cmd)
 933                 return -ENOMEM;
 934
 935         cmd->code = cmd_code;
 936         cmd->req = req;
 937         cmd->resp = resp;
 938         cmd->resp_len = resp_len;
 939         cmd->complete_cb = complete_cb;
 940         cmd->complete_cb_context = complete_cb_context;
 941
 942         pn533_build_cmd_frame(dev, cmd_code, req);
 943
 944         mutex_lock(&dev->cmd_lock);
 945
 946         if (!dev->cmd_pending) {
 947                 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
 948                 if (rc)
 949                         goto error;
 950
 951                 dev->cmd_pending = 1;
 952                 dev->cmd = cmd;
 953                 goto unlock;
 954         }
 955
 956         dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x\n",
 957                 __func__, cmd_code);
 958
 959         INIT_LIST_HEAD(&cmd->queue);
 960         list_add_tail(&cmd->queue, &dev->cmd_queue);
 961
 962         goto unlock;
 963
 964 error:
 965         kfree(cmd);
 966 unlock:
 967         mutex_unlock(&dev->cmd_lock);
 968         return rc;
 969 }
 970
 971 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
 972                                  struct sk_buff *req,
 973                                  pn533_send_async_complete_t complete_cb,
 974                                  void *complete_cb_context)
 975 {
 976         struct sk_buff *resp;
 977         int rc;
 978         int  resp_len = dev->ops->rx_header_len +
 979                         dev->ops->max_payload_len +
 980                         dev->ops->rx_tail_len;
 981
 982         resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
 983         if (!resp)
 984                 return -ENOMEM;
 985
 986         rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
 987                                 complete_cb_context);
 988         if (rc)
 989                 dev_kfree_skb(resp);
 990
 991         return rc;
 992 }
 993
 994 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
 995                                 struct sk_buff *req,
 996                                 pn533_send_async_complete_t complete_cb,
 997                                 void *complete_cb_context)
 998 {
 999         struct sk_buff *resp;
1000         int rc;
1001         int  resp_len = dev->ops->rx_header_len +
1002                         dev->ops->max_payload_len +
1003                         dev->ops->rx_tail_len;
1004
1005         resp = alloc_skb(resp_len, GFP_KERNEL);
1006         if (!resp)
1007                 return -ENOMEM;
1008
1009         rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
1010                                 complete_cb_context);
1011         if (rc)
1012                 dev_kfree_skb(resp);
1013
1014         return rc;
1015 }
1016
1017 /*
1018  * pn533_send_cmd_direct_async
1019  *
1020  * The function sends a piority cmd directly to the chip omiting the cmd
1021  * queue. It's intended to be used by chaining mechanism of received responses
1022  * where the host has to request every single chunk of data before scheduling
1023  * next cmd from the queue.
1024  */
1025 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
1026                                        struct sk_buff *req,
1027                                        pn533_send_async_complete_t complete_cb,
1028                                        void *complete_cb_context)
1029 {
1030         struct sk_buff *resp;
1031         struct pn533_cmd *cmd;
1032         int rc;
1033         int resp_len = dev->ops->rx_header_len +
1034                        dev->ops->max_payload_len +
1035                        dev->ops->rx_tail_len;
1036
1037         resp = alloc_skb(resp_len, GFP_KERNEL);
1038         if (!resp)
1039                 return -ENOMEM;
1040
1041         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1042         if (!cmd) {
1043                 dev_kfree_skb(resp);
1044                 return -ENOMEM;
1045         }
1046
1047         cmd->code = cmd_code;
1048         cmd->req = req;
1049         cmd->resp = resp;
1050         cmd->resp_len = resp_len;
1051         cmd->complete_cb = complete_cb;
1052         cmd->complete_cb_context = complete_cb_context;
1053
1054         pn533_build_cmd_frame(dev, cmd_code, req);
1055
1056         rc = __pn533_send_frame_async(dev, req, resp, resp_len);
1057         if (rc < 0) {
1058                 dev_kfree_skb(resp);
1059                 kfree(cmd);
1060         } else {
1061                 dev->cmd = cmd;
1062         }
1063
1064         return rc;
1065 }
1066
1067 static void pn533_wq_cmd_complete(struct work_struct *work)
1068 {
1069         struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1070         int rc;
1071
1072         rc = pn533_send_async_complete(dev);
1073         if (rc != -EINPROGRESS)
1074                 queue_work(dev->wq, &dev->cmd_work);
1075 }
1076
1077 static void pn533_wq_cmd(struct work_struct *work)
1078 {
1079         struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1080         struct pn533_cmd *cmd;
1081         int rc;
1082
1083         mutex_lock(&dev->cmd_lock);
1084
1085         if (list_empty(&dev->cmd_queue)) {
1086                 dev->cmd_pending = 0;
1087                 mutex_unlock(&dev->cmd_lock);
1088                 return;
1089         }
1090
1091         cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1092
1093         list_del(&cmd->queue);
1094
1095         mutex_unlock(&dev->cmd_lock);
1096
1097         rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
1098         if (rc < 0) {
1099                 dev_kfree_skb(cmd->req);
1100                 dev_kfree_skb(cmd->resp);
1101                 kfree(cmd);
1102                 return;
1103         }
1104
1105         dev->cmd = cmd;
1106 }
1107
1108 struct pn533_sync_cmd_response {
1109         struct sk_buff *resp;
1110         struct completion done;
1111 };
1112
1113 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1114                                     struct sk_buff *resp)
1115 {
1116         struct pn533_sync_cmd_response *arg = _arg;
1117
1118         arg->resp = resp;
1119         complete(&arg->done);
1120
1121         return 0;
1122 }
1123
1124 /*  pn533_send_cmd_sync
1125  *
1126  *  Please note the req parameter is freed inside the function to
1127  *  limit a number of return value interpretations by the caller.
1128  *
1129  *  1. negative in case of error during TX path -> req should be freed
1130  *
1131  *  2. negative in case of error during RX path -> req should not be freed
1132  *     as it's been already freed at the begining of RX path by
1133  *     async_complete_cb.
1134  *
1135  *  3. valid pointer in case of succesfult RX path
1136  *
1137  *  A caller has to check a return value with IS_ERR macro. If the test pass,
1138  *  the returned pointer is valid.
1139  *
1140  * */
1141 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1142                                                struct sk_buff *req)
1143 {
1144         int rc;
1145         struct pn533_sync_cmd_response arg;
1146
1147         init_completion(&arg.done);
1148
1149         rc = pn533_send_cmd_async(dev, cmd_code, req,
1150                                   pn533_send_sync_complete, &arg);
1151         if (rc) {
1152                 dev_kfree_skb(req);
1153                 return ERR_PTR(rc);
1154         }
1155
1156         wait_for_completion(&arg.done);
1157
1158         return arg.resp;
1159 }
1160
1161 static void pn533_send_complete(struct urb *urb)
1162 {
1163         struct pn533 *dev = urb->context;
1164
1165         switch (urb->status) {
1166         case 0:
1167                 break; /* success */
1168         case -ECONNRESET:
1169         case -ENOENT:
1170                 dev_dbg(&dev->interface->dev,
1171                         "The urb has been stopped (status %d)\n",
1172                         urb->status);
1173                 break;
1174         case -ESHUTDOWN:
1175         default:
1176                 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
1177                         urb->status);
1178         }
1179 }
1180
1181 static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1182 {
1183         /* ACR122U does not support any command which aborts last
1184          * issued command i.e. as ACK for standard PN533. Additionally,
1185          * it behaves stange, sending broken or incorrect responses,
1186          * when we cancel urb before the chip will send response.
1187          */
1188         if (dev->device_type == PN533_DEVICE_ACR122U)
1189                 return;
1190
1191         /* An ack will cancel the last issued command */
1192         pn533_send_ack(dev, flags);
1193
1194         /* cancel the urb request */
1195         usb_kill_urb(dev->in_urb);
1196 }
1197
1198 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
1199 {
1200         struct sk_buff *skb;
1201
1202         skb = alloc_skb(dev->ops->tx_header_len +
1203                         size +
1204                         dev->ops->tx_tail_len, GFP_KERNEL);
1205
1206         if (skb)
1207                 skb_reserve(skb, dev->ops->tx_header_len);
1208
1209         return skb;
1210 }
1211
1212 struct pn533_target_type_a {
1213         __be16 sens_res;
1214         u8 sel_res;
1215         u8 nfcid_len;
1216         u8 nfcid_data[];
1217 } __packed;
1218
1219
1220 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1221 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1222 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1223
1224 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1225 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1226
1227 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1228 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1229
1230 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
1231 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
1232 #define PN533_TYPE_A_SEL_PROT_DEP 2
1233 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1234
1235 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1236                                                         int target_data_len)
1237 {
1238         u8 ssd;
1239         u8 platconf;
1240
1241         if (target_data_len < sizeof(struct pn533_target_type_a))
1242                 return false;
1243
1244         /* The lenght check of nfcid[] and ats[] are not being performed because
1245            the values are not being used */
1246
1247         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1248         ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1249         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1250
1251         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1252              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1253             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1254              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1255                 return false;
1256
1257         /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1258         if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1259                 return false;
1260
1261         return true;
1262 }
1263
1264 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1265                                                         int tgt_data_len)
1266 {
1267         struct pn533_target_type_a *tgt_type_a;
1268
1269         tgt_type_a = (struct pn533_target_type_a *)tgt_data;
1270
1271         if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1272                 return -EPROTO;
1273
1274         switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1275         case PN533_TYPE_A_SEL_PROT_MIFARE:
1276                 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1277                 break;
1278         case PN533_TYPE_A_SEL_PROT_ISO14443:
1279                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1280                 break;
1281         case PN533_TYPE_A_SEL_PROT_DEP:
1282                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1283                 break;
1284         case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1285                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1286                                                         NFC_PROTO_NFC_DEP_MASK;
1287                 break;
1288         }
1289
1290         nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1291         nfc_tgt->sel_res = tgt_type_a->sel_res;
1292         nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1293         memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
1294
1295         return 0;
1296 }
1297
1298 struct pn533_target_felica {
1299         u8 pol_res;
1300         u8 opcode;
1301         u8 nfcid2[NFC_NFCID2_MAXSIZE];
1302         u8 pad[8];
1303         /* optional */
1304         u8 syst_code[];
1305 } __packed;
1306
1307 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1308 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1309
1310 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1311                                                         int target_data_len)
1312 {
1313         if (target_data_len < sizeof(struct pn533_target_felica))
1314                 return false;
1315
1316         if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1317                 return false;
1318
1319         return true;
1320 }
1321
1322 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1323                                                         int tgt_data_len)
1324 {
1325         struct pn533_target_felica *tgt_felica;
1326
1327         tgt_felica = (struct pn533_target_felica *)tgt_data;
1328
1329         if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1330                 return -EPROTO;
1331
1332         if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1333             (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
1334                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1335         else
1336                 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1337
1338         memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1339         nfc_tgt->sensf_res_len = 9;
1340
1341         memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
1342         nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
1343
1344         return 0;
1345 }
1346
1347 struct pn533_target_jewel {
1348         __be16 sens_res;
1349         u8 jewelid[4];
1350 } __packed;
1351
1352 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1353                                                         int target_data_len)
1354 {
1355         u8 ssd;
1356         u8 platconf;
1357
1358         if (target_data_len < sizeof(struct pn533_target_jewel))
1359                 return false;
1360
1361         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1362         ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1363         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1364
1365         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1366              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1367             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1368              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1369                 return false;
1370
1371         return true;
1372 }
1373
1374 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1375                                                         int tgt_data_len)
1376 {
1377         struct pn533_target_jewel *tgt_jewel;
1378
1379         tgt_jewel = (struct pn533_target_jewel *)tgt_data;
1380
1381         if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1382                 return -EPROTO;
1383
1384         nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1385         nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
1386         nfc_tgt->nfcid1_len = 4;
1387         memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
1388
1389         return 0;
1390 }
1391
1392 struct pn533_type_b_prot_info {
1393         u8 bitrate;
1394         u8 fsci_type;
1395         u8 fwi_adc_fo;
1396 } __packed;
1397
1398 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1399 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1400 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1401
1402 struct pn533_type_b_sens_res {
1403         u8 opcode;
1404         u8 nfcid[4];
1405         u8 appdata[4];
1406         struct pn533_type_b_prot_info prot_info;
1407 } __packed;
1408
1409 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1410
1411 struct pn533_target_type_b {
1412         struct pn533_type_b_sens_res sensb_res;
1413         u8 attrib_res_len;
1414         u8 attrib_res[];
1415 } __packed;
1416
1417 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1418                                                         int target_data_len)
1419 {
1420         if (target_data_len < sizeof(struct pn533_target_type_b))
1421                 return false;
1422
1423         if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1424                 return false;
1425
1426         if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1427                                                 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1428                 return false;
1429
1430         return true;
1431 }
1432
1433 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1434                                                         int tgt_data_len)
1435 {
1436         struct pn533_target_type_b *tgt_type_b;
1437
1438         tgt_type_b = (struct pn533_target_type_b *)tgt_data;
1439
1440         if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1441                 return -EPROTO;
1442
1443         nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1444
1445         return 0;
1446 }
1447
1448 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1449                               int tgdata_len)
1450 {
1451         struct nfc_target nfc_tgt;
1452         int rc;
1453
1454         dev_dbg(&dev->interface->dev, "%s: modulation=%d\n",
1455                 __func__, dev->poll_mod_curr);
1456
1457         if (tg != 1)
1458                 return -EPROTO;
1459
1460         memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1461
1462         switch (dev->poll_mod_curr) {
1463         case PN533_POLL_MOD_106KBPS_A:
1464                 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
1465                 break;
1466         case PN533_POLL_MOD_212KBPS_FELICA:
1467         case PN533_POLL_MOD_424KBPS_FELICA:
1468                 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
1469                 break;
1470         case PN533_POLL_MOD_106KBPS_JEWEL:
1471                 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
1472                 break;
1473         case PN533_POLL_MOD_847KBPS_B:
1474                 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
1475                 break;
1476         default:
1477                 nfc_err(&dev->interface->dev,
1478                         "Unknown current poll modulation\n");
1479                 return -EPROTO;
1480         }
1481
1482         if (rc)
1483                 return rc;
1484
1485         if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1486                 dev_dbg(&dev->interface->dev,
1487                         "The Tg found doesn't have the desired protocol\n");
1488                 return -EAGAIN;
1489         }
1490
1491         dev_dbg(&dev->interface->dev,
1492                 "Target found - supported protocols: 0x%x\n",
1493                 nfc_tgt.supported_protocols);
1494
1495         dev->tgt_available_prots = nfc_tgt.supported_protocols;
1496
1497         nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1498
1499         return 0;
1500 }
1501
1502 static inline void pn533_poll_next_mod(struct pn533 *dev)
1503 {
1504         dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1505 }
1506
1507 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1508 {
1509         dev->poll_mod_count = 0;
1510 }
1511
1512 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1513 {
1514         dev->poll_mod_active[dev->poll_mod_count] =
1515                 (struct pn533_poll_modulations *)&poll_mod[mod_index];
1516         dev->poll_mod_count++;
1517 }
1518
1519 static void pn533_poll_create_mod_list(struct pn533 *dev,
1520                                        u32 im_protocols, u32 tm_protocols)
1521 {
1522         pn533_poll_reset_mod_list(dev);
1523
1524         if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1525             (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1526             (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1527                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1528
1529         if (im_protocols & NFC_PROTO_FELICA_MASK ||
1530             im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1531                 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1532                 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1533         }
1534
1535         if (im_protocols & NFC_PROTO_JEWEL_MASK)
1536                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1537
1538         if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1539                 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1540
1541         if (tm_protocols)
1542                 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1543 }
1544
1545 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
1546 {
1547         u8 nbtg, tg, *tgdata;
1548         int rc, tgdata_len;
1549
1550         /* Toggle the DEP polling */
1551         dev->poll_dep = 1;
1552
1553         nbtg = resp->data[0];
1554         tg = resp->data[1];
1555         tgdata = &resp->data[2];
1556         tgdata_len = resp->len - 2;  /* nbtg + tg */
1557
1558         if (nbtg) {
1559                 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1560
1561                 /* We must stop the poll after a valid target found */
1562                 if (rc == 0) {
1563                         pn533_poll_reset_mod_list(dev);
1564                         return 0;
1565                 }
1566         }
1567
1568         return -EAGAIN;
1569 }
1570
1571 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1572 {
1573         struct sk_buff *skb;
1574         u8 *felica, *nfcid3, *gb;
1575
1576         u8 *gbytes = dev->gb;
1577         size_t gbytes_len = dev->gb_len;
1578
1579         u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1580                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1581                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1582                                 0xff, 0xff}; /* System code */
1583
1584         u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1585                                0x0, 0x0, 0x0,
1586                                0x40}; /* SEL_RES for DEP */
1587
1588         unsigned int skb_len = 36 + /* mode (1), mifare (6),
1589                                        felica (18), nfcid3 (10), gb_len (1) */
1590                                gbytes_len +
1591                                1;  /* len Tk*/
1592
1593         skb = pn533_alloc_skb(dev, skb_len);
1594         if (!skb)
1595                 return NULL;
1596
1597         /* DEP support only */
1598         *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
1599
1600         /* MIFARE params */
1601         memcpy(skb_put(skb, 6), mifare_params, 6);
1602
1603         /* Felica params */
1604         felica = skb_put(skb, 18);
1605         memcpy(felica, felica_params, 18);
1606         get_random_bytes(felica + 2, 6);
1607
1608         /* NFCID3 */
1609         nfcid3 = skb_put(skb, 10);
1610         memset(nfcid3, 0, 10);
1611         memcpy(nfcid3, felica, 8);
1612
1613         /* General bytes */
1614         *skb_put(skb, 1) = gbytes_len;
1615
1616         gb = skb_put(skb, gbytes_len);
1617         memcpy(gb, gbytes, gbytes_len);
1618
1619         /* Len Tk */
1620         *skb_put(skb, 1) = 0;
1621
1622         return skb;
1623 }
1624
1625 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
1626 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1627 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1628                                       struct sk_buff *resp)
1629 {
1630         u8 status;
1631
1632         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1633
1634         if (IS_ERR(resp))
1635                 return PTR_ERR(resp);
1636
1637         status = resp->data[0];
1638         skb_pull(resp, sizeof(status));
1639
1640         if (status != 0) {
1641                 nfc_tm_deactivated(dev->nfc_dev);
1642                 dev->tgt_mode = 0;
1643                 dev_kfree_skb(resp);
1644                 return 0;
1645         }
1646
1647         return nfc_tm_data_received(dev->nfc_dev, resp);
1648 }
1649
1650 static void pn533_wq_tg_get_data(struct work_struct *work)
1651 {
1652         struct pn533 *dev = container_of(work, struct pn533, tg_work);
1653         struct sk_buff *skb;
1654         int rc;
1655
1656         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1657
1658         skb = pn533_alloc_skb(dev, 0);
1659         if (!skb)
1660                 return;
1661
1662         rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1663                                    pn533_tm_get_data_complete, NULL);
1664
1665         if (rc < 0)
1666                 dev_kfree_skb(skb);
1667
1668         return;
1669 }
1670
1671 #define ATR_REQ_GB_OFFSET 17
1672 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1673 {
1674         u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1675         size_t gb_len;
1676         int rc;
1677
1678         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1679
1680         if (resp->len < ATR_REQ_GB_OFFSET + 1)
1681                 return -EINVAL;
1682
1683         mode = resp->data[0];
1684         cmd = &resp->data[1];
1685
1686         dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1687                 mode, resp->len);
1688
1689         if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1690             PN533_INIT_TARGET_RESP_ACTIVE)
1691                 comm_mode = NFC_COMM_ACTIVE;
1692
1693         if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0)  /* Only DEP supported */
1694                 return -EOPNOTSUPP;
1695
1696         gb = cmd + ATR_REQ_GB_OFFSET;
1697         gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1698
1699         rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1700                               comm_mode, gb, gb_len);
1701         if (rc < 0) {
1702                 nfc_err(&dev->interface->dev,
1703                         "Error when signaling target activation\n");
1704                 return rc;
1705         }
1706
1707         dev->tgt_mode = 1;
1708         queue_work(dev->wq, &dev->tg_work);
1709
1710         return 0;
1711 }
1712
1713 static void pn533_listen_mode_timer(unsigned long data)
1714 {
1715         struct pn533 *dev = (struct pn533 *)data;
1716
1717         dev_dbg(&dev->interface->dev, "Listen mode timeout\n");
1718
1719         dev->cancel_listen = 1;
1720
1721         pn533_poll_next_mod(dev);
1722
1723         queue_delayed_work(dev->wq, &dev->poll_work,
1724                            msecs_to_jiffies(PN533_POLL_INTERVAL));
1725 }
1726
1727 static int pn533_rf_complete(struct pn533 *dev, void *arg,
1728                              struct sk_buff *resp)
1729 {
1730         int rc = 0;
1731
1732         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1733
1734         if (IS_ERR(resp)) {
1735                 rc = PTR_ERR(resp);
1736
1737                 nfc_err(&dev->interface->dev, "RF setting error %d", rc);
1738
1739                 return rc;
1740         }
1741
1742         queue_delayed_work(dev->wq, &dev->poll_work,
1743                            msecs_to_jiffies(PN533_POLL_INTERVAL));
1744
1745         dev_kfree_skb(resp);
1746         return rc;
1747 }
1748
1749 static void pn533_wq_rf(struct work_struct *work)
1750 {
1751         struct pn533 *dev = container_of(work, struct pn533, rf_work);
1752         struct sk_buff *skb;
1753         int rc;
1754
1755         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1756
1757         skb = pn533_alloc_skb(dev, 2);
1758         if (!skb)
1759                 return;
1760
1761         *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
1762         *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
1763
1764         rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1765                                   pn533_rf_complete, NULL);
1766         if (rc < 0) {
1767                 dev_kfree_skb(skb);
1768                 nfc_err(&dev->interface->dev, "RF setting error %d\n", rc);
1769         }
1770
1771         return;
1772 }
1773
1774 static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
1775                                    struct sk_buff *resp)
1776 {
1777         struct pn533_cmd_jump_dep_response *rsp;
1778         struct nfc_target nfc_target;
1779         u8 target_gt_len;
1780         int rc;
1781
1782         if (IS_ERR(resp))
1783                 return PTR_ERR(resp);
1784
1785         rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1786
1787         rc = rsp->status & PN533_CMD_RET_MASK;
1788         if (rc != PN533_CMD_RET_SUCCESS) {
1789                 /* Not target found, turn radio off */
1790                 queue_work(dev->wq, &dev->rf_work);
1791
1792                 dev_kfree_skb(resp);
1793                 return 0;
1794         }
1795
1796         dev_dbg(&dev->interface->dev, "Creating new target");
1797
1798         nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1799         nfc_target.nfcid1_len = 10;
1800         memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1801         rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1802         if (rc)
1803                 goto error;
1804
1805         dev->tgt_available_prots = 0;
1806         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1807
1808         /* ATR_RES general bytes are located at offset 17 */
1809         target_gt_len = resp->len - 17;
1810         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1811                                           rsp->gt, target_gt_len);
1812         if (!rc) {
1813                 rc = nfc_dep_link_is_up(dev->nfc_dev,
1814                                         dev->nfc_dev->targets[0].idx,
1815                                         0, NFC_RF_INITIATOR);
1816
1817                 if (!rc)
1818                         pn533_poll_reset_mod_list(dev);
1819         }
1820 error:
1821         dev_kfree_skb(resp);
1822         return rc;
1823 }
1824
1825 #define PASSIVE_DATA_LEN 5
1826 static int pn533_poll_dep(struct nfc_dev *nfc_dev)
1827 {
1828         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1829         struct sk_buff *skb;
1830         int rc, skb_len;
1831         u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
1832         u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1833
1834         dev_dbg(&dev->interface->dev, "%s", __func__);
1835
1836         if (!dev->gb) {
1837                 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1838
1839                 if (!dev->gb || !dev->gb_len) {
1840                         dev->poll_dep = 0;
1841                         queue_work(dev->wq, &dev->rf_work);
1842                 }
1843         }
1844
1845         skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
1846         skb_len += PASSIVE_DATA_LEN;
1847
1848         /* NFCID3 */
1849         skb_len += NFC_NFCID3_MAXSIZE;
1850         nfcid3[0] = 0x1;
1851         nfcid3[1] = 0xfe;
1852         get_random_bytes(nfcid3 + 2, 6);
1853
1854         skb = pn533_alloc_skb(dev, skb_len);
1855         if (!skb)
1856                 return -ENOMEM;
1857
1858         *skb_put(skb, 1) = 0x01;  /* Active */
1859         *skb_put(skb, 1) = 0x02;  /* 424 kbps */
1860
1861         next = skb_put(skb, 1);  /* Next */
1862         *next = 0;
1863
1864         /* Copy passive data */
1865         memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
1866         *next |= 1;
1867
1868         /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1869         memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
1870                NFC_NFCID3_MAXSIZE);
1871         *next |= 2;
1872
1873         memcpy(skb_put(skb, dev->gb_len), dev->gb, dev->gb_len);
1874         *next |= 4; /* We have some Gi */
1875
1876         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1877                                   pn533_poll_dep_complete, NULL);
1878
1879         if (rc < 0)
1880                 dev_kfree_skb(skb);
1881
1882         return rc;
1883 }
1884
1885 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1886                                struct sk_buff *resp)
1887 {
1888         struct pn533_poll_modulations *cur_mod;
1889         int rc;
1890
1891         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1892
1893         if (IS_ERR(resp)) {
1894                 rc = PTR_ERR(resp);
1895
1896                 nfc_err(&dev->interface->dev, "%s  Poll complete error %d\n",
1897                         __func__, rc);
1898
1899                 if (rc == -ENOENT) {
1900                         if (dev->poll_mod_count != 0)
1901                                 return rc;
1902                         else
1903                                 goto stop_poll;
1904                 } else if (rc < 0) {
1905                         nfc_err(&dev->interface->dev,
1906                                 "Error %d when running poll\n", rc);
1907                         goto stop_poll;
1908                 }
1909         }
1910
1911         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1912
1913         if (cur_mod->len == 0) { /* Target mode */
1914                 del_timer(&dev->listen_timer);
1915                 rc = pn533_init_target_complete(dev, resp);
1916                 goto done;
1917         }
1918
1919         /* Initiator mode */
1920         rc = pn533_start_poll_complete(dev, resp);
1921         if (!rc)
1922                 goto done;
1923
1924         if (!dev->poll_mod_count) {
1925                 dev_dbg(&dev->interface->dev, "Polling has been stopped\n");
1926                 goto done;
1927         }
1928
1929         pn533_poll_next_mod(dev);
1930         /* Not target found, turn radio off */
1931         queue_work(dev->wq, &dev->rf_work);
1932
1933 done:
1934         dev_kfree_skb(resp);
1935         return rc;
1936
1937 stop_poll:
1938         nfc_err(&dev->interface->dev, "Polling operation has been stopped\n");
1939
1940         pn533_poll_reset_mod_list(dev);
1941         dev->poll_protocols = 0;
1942         return rc;
1943 }
1944
1945 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1946                                         struct pn533_poll_modulations *mod)
1947 {
1948         struct sk_buff *skb;
1949
1950         skb = pn533_alloc_skb(dev, mod->len);
1951         if (!skb)
1952                 return NULL;
1953
1954         memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
1955
1956         return skb;
1957 }
1958
1959 static int pn533_send_poll_frame(struct pn533 *dev)
1960 {
1961         struct pn533_poll_modulations *mod;
1962         struct sk_buff *skb;
1963         int rc;
1964         u8 cmd_code;
1965
1966         mod = dev->poll_mod_active[dev->poll_mod_curr];
1967
1968         dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1969                 __func__, mod->len);
1970
1971         if (dev->poll_dep)  {
1972                 dev->poll_dep = 0;
1973                 return pn533_poll_dep(dev->nfc_dev);
1974         }
1975
1976         if (mod->len == 0) {  /* Listen mode */
1977                 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1978                 skb = pn533_alloc_poll_tg_frame(dev);
1979         } else {  /* Polling mode */
1980                 cmd_code =  PN533_CMD_IN_LIST_PASSIVE_TARGET;
1981                 skb = pn533_alloc_poll_in_frame(dev, mod);
1982         }
1983
1984         if (!skb) {
1985                 nfc_err(&dev->interface->dev, "Failed to allocate skb\n");
1986                 return -ENOMEM;
1987         }
1988
1989         rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1990                                   NULL);
1991         if (rc < 0) {
1992                 dev_kfree_skb(skb);
1993                 nfc_err(&dev->interface->dev, "Polling loop error %d\n", rc);
1994         }
1995
1996         return rc;
1997 }
1998
1999 static void pn533_wq_poll(struct work_struct *work)
2000 {
2001         struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
2002         struct pn533_poll_modulations *cur_mod;
2003         int rc;
2004
2005         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
2006
2007         dev_dbg(&dev->interface->dev,
2008                 "%s cancel_listen %d modulation len %d\n",
2009                 __func__, dev->cancel_listen, cur_mod->len);
2010
2011         if (dev->cancel_listen == 1) {
2012                 dev->cancel_listen = 0;
2013                 pn533_abort_cmd(dev, GFP_ATOMIC);
2014         }
2015
2016         rc = pn533_send_poll_frame(dev);
2017         if (rc)
2018                 return;
2019
2020         if (cur_mod->len == 0 && dev->poll_mod_count > 1)
2021                 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
2022
2023         return;
2024 }
2025
2026 static int pn533_start_poll(struct nfc_dev *nfc_dev,
2027                             u32 im_protocols, u32 tm_protocols)
2028 {
2029         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2030         struct pn533_poll_modulations *cur_mod;
2031         u8 rand_mod;
2032         int rc;
2033
2034         dev_dbg(&dev->interface->dev,
2035                 "%s: im protocols 0x%x tm protocols 0x%x\n",
2036                 __func__, im_protocols, tm_protocols);
2037
2038         if (dev->tgt_active_prot) {
2039                 nfc_err(&dev->interface->dev,
2040                         "Cannot poll with a target already activated\n");
2041                 return -EBUSY;
2042         }
2043
2044         if (dev->tgt_mode) {
2045                 nfc_err(&dev->interface->dev,
2046                         "Cannot poll while already being activated\n");
2047                 return -EBUSY;
2048         }
2049
2050         if (tm_protocols) {
2051                 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
2052                 if (dev->gb == NULL)
2053                         tm_protocols = 0;
2054         }
2055
2056         pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
2057         dev->poll_protocols = im_protocols;
2058         dev->listen_protocols = tm_protocols;
2059
2060         /* Do not always start polling from the same modulation */
2061         get_random_bytes(&rand_mod, sizeof(rand_mod));
2062         rand_mod %= dev->poll_mod_count;
2063         dev->poll_mod_curr = rand_mod;
2064
2065         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
2066
2067         rc = pn533_send_poll_frame(dev);
2068
2069         /* Start listen timer */
2070         if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
2071                 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
2072
2073         return rc;
2074 }
2075
2076 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
2077 {
2078         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2079
2080         del_timer(&dev->listen_timer);
2081
2082         if (!dev->poll_mod_count) {
2083                 dev_dbg(&dev->interface->dev,
2084                         "Polling operation was not running\n");
2085                 return;
2086         }
2087
2088         pn533_abort_cmd(dev, GFP_KERNEL);
2089         flush_delayed_work(&dev->poll_work);
2090         pn533_poll_reset_mod_list(dev);
2091 }
2092
2093 static int pn533_activate_target_nfcdep(struct pn533 *dev)
2094 {
2095         struct pn533_cmd_activate_response *rsp;
2096         u16 gt_len;
2097         int rc;
2098         struct sk_buff *skb;
2099         struct sk_buff *resp;
2100
2101         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2102
2103         skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
2104         if (!skb)
2105                 return -ENOMEM;
2106
2107         *skb_put(skb, sizeof(u8)) = 1; /* TG */
2108         *skb_put(skb, sizeof(u8)) = 0; /* Next */
2109
2110         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
2111         if (IS_ERR(resp))
2112                 return PTR_ERR(resp);
2113
2114         rsp = (struct pn533_cmd_activate_response *)resp->data;
2115         rc = rsp->status & PN533_CMD_RET_MASK;
2116         if (rc != PN533_CMD_RET_SUCCESS) {
2117                 nfc_err(&dev->interface->dev,
2118                         "Target activation failed (error 0x%x)\n", rc);
2119                 dev_kfree_skb(resp);
2120                 return -EIO;
2121         }
2122
2123         /* ATR_RES general bytes are located at offset 16 */
2124         gt_len = resp->len - 16;
2125         rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
2126
2127         dev_kfree_skb(resp);
2128         return rc;
2129 }
2130
2131 static int pn533_activate_target(struct nfc_dev *nfc_dev,
2132                                  struct nfc_target *target, u32 protocol)
2133 {
2134         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2135         int rc;
2136
2137         dev_dbg(&dev->interface->dev, "%s: protocol=%u\n", __func__, protocol);
2138
2139         if (dev->poll_mod_count) {
2140                 nfc_err(&dev->interface->dev,
2141                         "Cannot activate while polling\n");
2142                 return -EBUSY;
2143         }
2144
2145         if (dev->tgt_active_prot) {
2146                 nfc_err(&dev->interface->dev,
2147                         "There is already an active target\n");
2148                 return -EBUSY;
2149         }
2150
2151         if (!dev->tgt_available_prots) {
2152                 nfc_err(&dev->interface->dev,
2153                         "There is no available target to activate\n");
2154                 return -EINVAL;
2155         }
2156
2157         if (!(dev->tgt_available_prots & (1 << protocol))) {
2158                 nfc_err(&dev->interface->dev,
2159                         "Target doesn't support requested proto %u\n",
2160                         protocol);
2161                 return -EINVAL;
2162         }
2163
2164         if (protocol == NFC_PROTO_NFC_DEP) {
2165                 rc = pn533_activate_target_nfcdep(dev);
2166                 if (rc) {
2167                         nfc_err(&dev->interface->dev,
2168                                 "Activating target with DEP failed %d\n", rc);
2169                         return rc;
2170                 }
2171         }
2172
2173         dev->tgt_active_prot = protocol;
2174         dev->tgt_available_prots = 0;
2175
2176         return 0;
2177 }
2178
2179 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
2180                                     struct nfc_target *target)
2181 {
2182         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2183         struct sk_buff *skb;
2184         struct sk_buff *resp;
2185         int rc;
2186
2187         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2188
2189         if (!dev->tgt_active_prot) {
2190                 nfc_err(&dev->interface->dev, "There is no active target\n");
2191                 return;
2192         }
2193
2194         dev->tgt_active_prot = 0;
2195         skb_queue_purge(&dev->resp_q);
2196
2197         skb = pn533_alloc_skb(dev, sizeof(u8));
2198         if (!skb)
2199                 return;
2200
2201         *skb_put(skb, 1) = 1; /* TG*/
2202
2203         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
2204         if (IS_ERR(resp))
2205                 return;
2206
2207         rc = resp->data[0] & PN533_CMD_RET_MASK;
2208         if (rc != PN533_CMD_RET_SUCCESS)
2209                 nfc_err(&dev->interface->dev,
2210                         "Error 0x%x when releasing the target\n", rc);
2211
2212         dev_kfree_skb(resp);
2213         return;
2214 }
2215
2216
2217 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
2218                                          struct sk_buff *resp)
2219 {
2220         struct pn533_cmd_jump_dep_response *rsp;
2221         u8 target_gt_len;
2222         int rc;
2223         u8 active = *(u8 *)arg;
2224
2225         kfree(arg);
2226
2227         if (IS_ERR(resp))
2228                 return PTR_ERR(resp);
2229
2230         if (dev->tgt_available_prots &&
2231             !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
2232                 nfc_err(&dev->interface->dev,
2233                         "The target does not support DEP\n");
2234                 rc =  -EINVAL;
2235                 goto error;
2236         }
2237
2238         rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
2239
2240         rc = rsp->status & PN533_CMD_RET_MASK;
2241         if (rc != PN533_CMD_RET_SUCCESS) {
2242                 nfc_err(&dev->interface->dev,
2243                         "Bringing DEP link up failed (error 0x%x)\n", rc);
2244                 goto error;
2245         }
2246
2247         if (!dev->tgt_available_prots) {
2248                 struct nfc_target nfc_target;
2249
2250                 dev_dbg(&dev->interface->dev, "Creating new target\n");
2251
2252                 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2253                 nfc_target.nfcid1_len = 10;
2254                 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
2255                 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2256                 if (rc)
2257                         goto error;
2258
2259                 dev->tgt_available_prots = 0;
2260         }
2261
2262         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2263
2264         /* ATR_RES general bytes are located at offset 17 */
2265         target_gt_len = resp->len - 17;
2266         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
2267                                           rsp->gt, target_gt_len);
2268         if (rc == 0)
2269                 rc = nfc_dep_link_is_up(dev->nfc_dev,
2270                                         dev->nfc_dev->targets[0].idx,
2271                                         !active, NFC_RF_INITIATOR);
2272
2273 error:
2274         dev_kfree_skb(resp);
2275         return rc;
2276 }
2277
2278 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
2279 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
2280                              u8 comm_mode, u8 *gb, size_t gb_len)
2281 {
2282         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2283         struct sk_buff *skb;
2284         int rc, skb_len;
2285         u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
2286         u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
2287
2288         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2289
2290         if (dev->poll_mod_count) {
2291                 nfc_err(&dev->interface->dev,
2292                         "Cannot bring the DEP link up while polling\n");
2293                 return -EBUSY;
2294         }
2295
2296         if (dev->tgt_active_prot) {
2297                 nfc_err(&dev->interface->dev,
2298                         "There is already an active target\n");
2299                 return -EBUSY;
2300         }
2301
2302         skb_len = 3 + gb_len; /* ActPass + BR + Next */
2303         skb_len += PASSIVE_DATA_LEN;
2304
2305         /* NFCID3 */
2306         skb_len += NFC_NFCID3_MAXSIZE;
2307         if (target && !target->nfcid2_len) {
2308                 nfcid3[0] = 0x1;
2309                 nfcid3[1] = 0xfe;
2310                 get_random_bytes(nfcid3 + 2, 6);
2311         }
2312
2313         skb = pn533_alloc_skb(dev, skb_len);
2314         if (!skb)
2315                 return -ENOMEM;
2316
2317         *skb_put(skb, 1) = !comm_mode;  /* ActPass */
2318         *skb_put(skb, 1) = 0x02;  /* 424 kbps */
2319
2320         next = skb_put(skb, 1);  /* Next */
2321         *next = 0;
2322
2323         /* Copy passive data */
2324         memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
2325         *next |= 1;
2326
2327         /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
2328         if (target && target->nfcid2_len)
2329                 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2330                        target->nfcid2_len);
2331         else
2332                 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
2333                        NFC_NFCID3_MAXSIZE);
2334         *next |= 2;
2335
2336         if (gb != NULL && gb_len > 0) {
2337                 memcpy(skb_put(skb, gb_len), gb, gb_len);
2338                 *next |= 4; /* We have some Gi */
2339         } else {
2340                 *next = 0;
2341         }
2342
2343         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2344         if (!arg) {
2345                 dev_kfree_skb(skb);
2346                 return -ENOMEM;
2347         }
2348
2349         *arg = !comm_mode;
2350
2351         pn533_rf_field(dev->nfc_dev, 0);
2352
2353         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2354                                   pn533_in_dep_link_up_complete, arg);
2355
2356         if (rc < 0) {
2357                 dev_kfree_skb(skb);
2358                 kfree(arg);
2359         }
2360
2361         return rc;
2362 }
2363
2364 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2365 {
2366         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2367
2368         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2369
2370         pn533_poll_reset_mod_list(dev);
2371
2372         if (dev->tgt_mode || dev->tgt_active_prot)
2373                 pn533_abort_cmd(dev, GFP_KERNEL);
2374
2375         dev->tgt_active_prot = 0;
2376         dev->tgt_mode = 0;
2377
2378         skb_queue_purge(&dev->resp_q);
2379
2380         return 0;
2381 }
2382
2383 struct pn533_data_exchange_arg {
2384         data_exchange_cb_t cb;
2385         void *cb_context;
2386 };
2387
2388 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2389 {
2390         struct sk_buff *skb, *tmp, *t;
2391         unsigned int skb_len = 0, tmp_len = 0;
2392
2393         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2394
2395         if (skb_queue_empty(&dev->resp_q))
2396                 return NULL;
2397
2398         if (skb_queue_len(&dev->resp_q) == 1) {
2399                 skb = skb_dequeue(&dev->resp_q);
2400                 goto out;
2401         }
2402
2403         skb_queue_walk_safe(&dev->resp_q, tmp, t)
2404                 skb_len += tmp->len;
2405
2406         dev_dbg(&dev->interface->dev, "%s total length %d\n",
2407                 __func__, skb_len);
2408
2409         skb = alloc_skb(skb_len, GFP_KERNEL);
2410         if (skb == NULL)
2411                 goto out;
2412
2413         skb_put(skb, skb_len);
2414
2415         skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2416                 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2417                 tmp_len += tmp->len;
2418         }
2419
2420 out:
2421         skb_queue_purge(&dev->resp_q);
2422
2423         return skb;
2424 }
2425
2426 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2427                                         struct sk_buff *resp)
2428 {
2429         struct pn533_data_exchange_arg *arg = _arg;
2430         struct sk_buff *skb;
2431         int rc = 0;
2432         u8 status, ret, mi;
2433
2434         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2435
2436         if (IS_ERR(resp)) {
2437                 rc = PTR_ERR(resp);
2438                 goto _error;
2439         }
2440
2441         status = resp->data[0];
2442         ret = status & PN533_CMD_RET_MASK;
2443         mi = status & PN533_CMD_MI_MASK;
2444
2445         skb_pull(resp, sizeof(status));
2446
2447         if (ret != PN533_CMD_RET_SUCCESS) {
2448                 nfc_err(&dev->interface->dev,
2449                         "Exchanging data failed (error 0x%x)\n", ret);
2450                 rc = -EIO;
2451                 goto error;
2452         }
2453
2454         skb_queue_tail(&dev->resp_q, resp);
2455
2456         if (mi) {
2457                 dev->cmd_complete_mi_arg = arg;
2458                 queue_work(dev->wq, &dev->mi_rx_work);
2459                 return -EINPROGRESS;
2460         }
2461
2462         /* Prepare for the next round */
2463         if (skb_queue_len(&dev->fragment_skb) > 0) {
2464                 dev->cmd_complete_dep_arg = arg;
2465                 queue_work(dev->wq, &dev->mi_tx_work);
2466
2467                 return -EINPROGRESS;
2468         }
2469
2470         skb = pn533_build_response(dev);
2471         if (!skb)
2472                 goto error;
2473
2474         arg->cb(arg->cb_context, skb, 0);
2475         kfree(arg);
2476         return 0;
2477
2478 error:
2479         dev_kfree_skb(resp);
2480 _error:
2481         skb_queue_purge(&dev->resp_q);
2482         arg->cb(arg->cb_context, NULL, rc);
2483         kfree(arg);
2484         return rc;
2485 }
2486
2487 /* Split the Tx skb into small chunks */
2488 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2489 {
2490         struct sk_buff *frag;
2491         int  frag_size;
2492
2493         do {
2494                 /* Remaining size */
2495                 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2496                         frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2497                 else
2498                         frag_size = skb->len;
2499
2500                 /* Allocate and reserve */
2501                 frag = pn533_alloc_skb(dev, frag_size);
2502                 if (!frag) {
2503                         skb_queue_purge(&dev->fragment_skb);
2504                         break;
2505                 }
2506
2507                 /* Reserve the TG/MI byte */
2508                 skb_reserve(frag, 1);
2509
2510                 /* MI + TG */
2511                 if (frag_size  == PN533_CMD_DATAFRAME_MAXLEN)
2512                         *skb_push(frag, sizeof(u8)) = (PN533_CMD_MI_MASK | 1);
2513                 else
2514                         *skb_push(frag, sizeof(u8)) =  1; /* TG */
2515
2516                 memcpy(skb_put(frag, frag_size), skb->data, frag_size);
2517
2518                 /* Reduce the size of incoming buffer */
2519                 skb_pull(skb, frag_size);
2520
2521                 /* Add this to skb_queue */
2522                 skb_queue_tail(&dev->fragment_skb, frag);
2523
2524         } while (skb->len > 0);
2525
2526         dev_kfree_skb(skb);
2527
2528         return skb_queue_len(&dev->fragment_skb);
2529 }
2530
2531 static int pn533_transceive(struct nfc_dev *nfc_dev,
2532                             struct nfc_target *target, struct sk_buff *skb,
2533                             data_exchange_cb_t cb, void *cb_context)
2534 {
2535         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2536         struct pn533_data_exchange_arg *arg = NULL;
2537         int rc;
2538
2539         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2540
2541         if (!dev->tgt_active_prot) {
2542                 nfc_err(&dev->interface->dev,
2543                         "Can't exchange data if there is no active target\n");
2544                 rc = -EINVAL;
2545                 goto error;
2546         }
2547
2548         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2549         if (!arg) {
2550                 rc = -ENOMEM;
2551                 goto error;
2552         }
2553
2554         arg->cb = cb;
2555         arg->cb_context = cb_context;
2556
2557         switch (dev->device_type) {
2558         case PN533_DEVICE_PASORI:
2559                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2560                         rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2561                                                    skb,
2562                                                    pn533_data_exchange_complete,
2563                                                    arg);
2564
2565                         break;
2566                 }
2567         default:
2568                 /* jumbo frame ? */
2569                 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2570                         rc = pn533_fill_fragment_skbs(dev, skb);
2571                         if (rc <= 0)
2572                                 goto error;
2573
2574                         skb = skb_dequeue(&dev->fragment_skb);
2575                         if (!skb) {
2576                                 rc = -EIO;
2577                                 goto error;
2578                         }
2579                 } else {
2580                         *skb_push(skb, sizeof(u8)) =  1; /* TG */
2581                 }
2582
2583                 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2584                                            skb, pn533_data_exchange_complete,
2585                                            arg);
2586
2587                 break;
2588         }
2589
2590         if (rc < 0) /* rc from send_async */
2591                 goto error;
2592
2593         return 0;
2594
2595 error:
2596         kfree(arg);
2597         dev_kfree_skb(skb);
2598         return rc;
2599 }
2600
2601 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2602                                   struct sk_buff *resp)
2603 {
2604         u8 status;
2605
2606         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2607
2608         if (IS_ERR(resp))
2609                 return PTR_ERR(resp);
2610
2611         status = resp->data[0];
2612
2613         dev_kfree_skb(resp);
2614
2615         if (status != 0) {
2616                 nfc_tm_deactivated(dev->nfc_dev);
2617
2618                 dev->tgt_mode = 0;
2619
2620                 return 0;
2621         }
2622
2623         queue_work(dev->wq, &dev->tg_work);
2624
2625         return 0;
2626 }
2627
2628 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2629 {
2630         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2631         int rc;
2632
2633         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2634
2635         if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2636                 nfc_err(&dev->interface->dev,
2637                         "Data length greater than the max allowed: %d\n",
2638                         PN533_CMD_DATAEXCH_DATA_MAXLEN);
2639                 return -ENOSYS;
2640         }
2641
2642         rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2643                                    pn533_tm_send_complete, NULL);
2644         if (rc < 0)
2645                 dev_kfree_skb(skb);
2646
2647         return rc;
2648 }
2649
2650 static void pn533_wq_mi_recv(struct work_struct *work)
2651 {
2652         struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
2653         struct sk_buff *skb;
2654         int rc;
2655
2656         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2657
2658         skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2659         if (!skb)
2660                 goto error;
2661
2662         switch (dev->device_type) {
2663         case PN533_DEVICE_PASORI:
2664                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2665                         rc = pn533_send_cmd_direct_async(dev,
2666                                                 PN533_CMD_IN_COMM_THRU,
2667                                                 skb,
2668                                                 pn533_data_exchange_complete,
2669                                                  dev->cmd_complete_mi_arg);
2670
2671                         break;
2672                 }
2673         default:
2674                 *skb_put(skb, sizeof(u8)) =  1; /*TG*/
2675
2676                 rc = pn533_send_cmd_direct_async(dev,
2677                                                  PN533_CMD_IN_DATA_EXCHANGE,
2678                                                  skb,
2679                                                  pn533_data_exchange_complete,
2680                                                  dev->cmd_complete_mi_arg);
2681
2682                 break;
2683         }
2684
2685         if (rc == 0) /* success */
2686                 return;
2687
2688         nfc_err(&dev->interface->dev,
2689                 "Error %d when trying to perform data_exchange\n", rc);
2690
2691         dev_kfree_skb(skb);
2692         kfree(dev->cmd_complete_mi_arg);
2693
2694 error:
2695         pn533_send_ack(dev, GFP_KERNEL);
2696         queue_work(dev->wq, &dev->cmd_work);
2697 }
2698
2699 static void pn533_wq_mi_send(struct work_struct *work)
2700 {
2701         struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2702         struct sk_buff *skb;
2703         int rc;
2704
2705         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2706
2707         /* Grab the first skb in the queue */
2708         skb = skb_dequeue(&dev->fragment_skb);
2709
2710         if (skb == NULL) {      /* No more data */
2711                 /* Reset the queue for future use */
2712                 skb_queue_head_init(&dev->fragment_skb);
2713                 goto error;
2714         }
2715
2716         switch (dev->device_type) {
2717         case PN533_DEVICE_PASORI:
2718                 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2719                         rc = -EIO;
2720                         break;
2721                 }
2722
2723                 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2724                                                  skb,
2725                                                  pn533_data_exchange_complete,
2726                                                  dev->cmd_complete_dep_arg);
2727
2728                 break;
2729
2730         default:
2731                 /* Still some fragments? */
2732                 rc = pn533_send_cmd_direct_async(dev,PN533_CMD_IN_DATA_EXCHANGE,
2733                                                  skb,
2734                                                  pn533_data_exchange_complete,
2735                                                  dev->cmd_complete_dep_arg);
2736
2737                 break;
2738         }
2739
2740         if (rc == 0) /* success */
2741                 return;
2742
2743         nfc_err(&dev->interface->dev,
2744                 "Error %d when trying to perform data_exchange\n", rc);
2745
2746         dev_kfree_skb(skb);
2747         kfree(dev->cmd_complete_dep_arg);
2748
2749 error:
2750         pn533_send_ack(dev, GFP_KERNEL);
2751         queue_work(dev->wq, &dev->cmd_work);
2752 }
2753
2754 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2755                                                                 u8 cfgdata_len)
2756 {
2757         struct sk_buff *skb;
2758         struct sk_buff *resp;
2759         int skb_len;
2760
2761         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2762
2763         skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2764
2765         skb = pn533_alloc_skb(dev, skb_len);
2766         if (!skb)
2767                 return -ENOMEM;
2768
2769         *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2770         memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
2771
2772         resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2773         if (IS_ERR(resp))
2774                 return PTR_ERR(resp);
2775
2776         dev_kfree_skb(resp);
2777         return 0;
2778 }
2779
2780 static int pn533_get_firmware_version(struct pn533 *dev,
2781                                       struct pn533_fw_version *fv)
2782 {
2783         struct sk_buff *skb;
2784         struct sk_buff *resp;
2785
2786         skb = pn533_alloc_skb(dev, 0);
2787         if (!skb)
2788                 return -ENOMEM;
2789
2790         resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2791         if (IS_ERR(resp))
2792                 return PTR_ERR(resp);
2793
2794         fv->ic = resp->data[0];
2795         fv->ver = resp->data[1];
2796         fv->rev = resp->data[2];
2797         fv->support = resp->data[3];
2798
2799         dev_kfree_skb(resp);
2800         return 0;
2801 }
2802
2803 static int pn533_pasori_fw_reset(struct pn533 *dev)
2804 {
2805         struct sk_buff *skb;
2806         struct sk_buff *resp;
2807
2808         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2809
2810         skb = pn533_alloc_skb(dev, sizeof(u8));
2811         if (!skb)
2812                 return -ENOMEM;
2813
2814         *skb_put(skb, sizeof(u8)) = 0x1;
2815
2816         resp = pn533_send_cmd_sync(dev, 0x18, skb);
2817         if (IS_ERR(resp))
2818                 return PTR_ERR(resp);
2819
2820         dev_kfree_skb(resp);
2821
2822         return 0;
2823 }
2824
2825 struct pn533_acr122_poweron_rdr_arg {
2826         int rc;
2827         struct completion done;
2828 };
2829
2830 static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2831 {
2832         struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2833
2834         dev_dbg(&urb->dev->dev, "%s\n", __func__);
2835
2836         print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
2837                        urb->transfer_buffer, urb->transfer_buffer_length,
2838                        false);
2839
2840         arg->rc = urb->status;
2841         complete(&arg->done);
2842 }
2843
2844 static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2845 {
2846         /* Power on th reader (CCID cmd) */
2847         u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2848                       0, 0, 0, 0, 0, 0, 3, 0, 0};
2849         u8 buf[255];
2850         int rc;
2851         void *cntx;
2852         struct pn533_acr122_poweron_rdr_arg arg;
2853
2854         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2855
2856         init_completion(&arg.done);
2857         cntx = dev->in_urb->context;  /* backup context */
2858
2859         dev->in_urb->transfer_buffer = buf;
2860         dev->in_urb->transfer_buffer_length = 255;
2861         dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2862         dev->in_urb->context = &arg;
2863
2864         dev->out_urb->transfer_buffer = cmd;
2865         dev->out_urb->transfer_buffer_length = sizeof(cmd);
2866
2867         print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
2868                        cmd, sizeof(cmd), false);
2869
2870         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2871         if (rc) {
2872                 nfc_err(&dev->interface->dev,
2873                         "Reader power on cmd error %d\n", rc);
2874                 return rc;
2875         }
2876
2877         rc =  usb_submit_urb(dev->in_urb, GFP_KERNEL);
2878         if (rc) {
2879                 nfc_err(&dev->interface->dev,
2880                         "Can't submit reader poweron cmd response %d\n", rc);
2881                 return rc;
2882         }
2883
2884         wait_for_completion(&arg.done);
2885         dev->in_urb->context = cntx; /* restore context */
2886
2887         return arg.rc;
2888 }
2889
2890 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2891 {
2892         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2893         u8 rf_field = !!rf;
2894         int rc;
2895
2896         rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2897
2898         rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2899                                      (u8 *)&rf_field, 1);
2900         if (rc) {
2901                 nfc_err(&dev->interface->dev, "Error on setting RF field\n");
2902                 return rc;
2903         }
2904
2905         return rc;
2906 }
2907
2908 int pn533_dev_up(struct nfc_dev *nfc_dev)
2909 {
2910         return pn533_rf_field(nfc_dev, 1);
2911 }
2912
2913 int pn533_dev_down(struct nfc_dev *nfc_dev)
2914 {
2915         return pn533_rf_field(nfc_dev, 0);
2916 }
2917
2918 static struct nfc_ops pn533_nfc_ops = {
2919         .dev_up = pn533_dev_up,
2920         .dev_down = pn533_dev_down,
2921         .dep_link_up = pn533_dep_link_up,
2922         .dep_link_down = pn533_dep_link_down,
2923         .start_poll = pn533_start_poll,
2924         .stop_poll = pn533_stop_poll,
2925         .activate_target = pn533_activate_target,
2926         .deactivate_target = pn533_deactivate_target,
2927         .im_transceive = pn533_transceive,
2928         .tm_send = pn533_tm_send,
2929 };
2930
2931 static int pn533_setup(struct pn533 *dev)
2932 {
2933         struct pn533_config_max_retries max_retries;
2934         struct pn533_config_timing timing;
2935         u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2936         int rc;
2937
2938         switch (dev->device_type) {
2939         case PN533_DEVICE_STD:
2940         case PN533_DEVICE_PASORI:
2941         case PN533_DEVICE_ACR122U:
2942                 max_retries.mx_rty_atr = 0x2;
2943                 max_retries.mx_rty_psl = 0x1;
2944                 max_retries.mx_rty_passive_act =
2945                         PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2946
2947                 timing.rfu = PN533_CONFIG_TIMING_102;
2948                 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2949                 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2950
2951                 break;
2952
2953         default:
2954                 nfc_err(&dev->interface->dev, "Unknown device type %d\n",
2955                         dev->device_type);
2956                 return -EINVAL;
2957         }
2958
2959         rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2960                                      (u8 *)&max_retries, sizeof(max_retries));
2961         if (rc) {
2962                 nfc_err(&dev->interface->dev,
2963                         "Error on setting MAX_RETRIES config\n");
2964                 return rc;
2965         }
2966
2967
2968         rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2969                                      (u8 *)&timing, sizeof(timing));
2970         if (rc) {
2971                 nfc_err(&dev->interface->dev, "Error on setting RF timings\n");
2972                 return rc;
2973         }
2974
2975         switch (dev->device_type) {
2976         case PN533_DEVICE_STD:
2977                 break;
2978
2979         case PN533_DEVICE_PASORI:
2980                 pn533_pasori_fw_reset(dev);
2981
2982                 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2983                                              pasori_cfg, 3);
2984                 if (rc) {
2985                         nfc_err(&dev->interface->dev,
2986                                 "Error while settings PASORI config\n");
2987                         return rc;
2988                 }
2989
2990                 pn533_pasori_fw_reset(dev);
2991
2992                 break;
2993         }
2994
2995         return 0;
2996 }
2997
2998 static int pn533_probe(struct usb_interface *interface,
2999                         const struct usb_device_id *id)
3000 {
3001         struct pn533_fw_version fw_ver;
3002         struct pn533 *dev;
3003         struct usb_host_interface *iface_desc;
3004         struct usb_endpoint_descriptor *endpoint;
3005         int in_endpoint = 0;
3006         int out_endpoint = 0;
3007         int rc = -ENOMEM;
3008         int i;
3009         u32 protocols;
3010
3011         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
3012         if (!dev)
3013                 return -ENOMEM;
3014
3015         dev->udev = usb_get_dev(interface_to_usbdev(interface));
3016         dev->interface = interface;
3017         mutex_init(&dev->cmd_lock);
3018
3019         iface_desc = interface->cur_altsetting;
3020         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
3021                 endpoint = &iface_desc->endpoint[i].desc;
3022
3023                 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
3024                         in_endpoint = endpoint->bEndpointAddress;
3025
3026                 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
3027                         out_endpoint = endpoint->bEndpointAddress;
3028         }
3029
3030         if (!in_endpoint || !out_endpoint) {
3031                 nfc_err(&interface->dev,
3032                         "Could not find bulk-in or bulk-out endpoint\n");
3033                 rc = -ENODEV;
3034                 goto error;
3035         }
3036
3037         dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
3038         dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
3039
3040         if (!dev->in_urb || !dev->out_urb)
3041                 goto error;
3042
3043         usb_fill_bulk_urb(dev->in_urb, dev->udev,
3044                           usb_rcvbulkpipe(dev->udev, in_endpoint),
3045                           NULL, 0, NULL, dev);
3046         usb_fill_bulk_urb(dev->out_urb, dev->udev,
3047                           usb_sndbulkpipe(dev->udev, out_endpoint),
3048                           NULL, 0, pn533_send_complete, dev);
3049
3050         INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
3051         INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
3052         INIT_WORK(&dev->mi_rx_work, pn533_wq_mi_recv);
3053         INIT_WORK(&dev->mi_tx_work, pn533_wq_mi_send);
3054         INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
3055         INIT_DELAYED_WORK(&dev->poll_work, pn533_wq_poll);
3056         INIT_WORK(&dev->rf_work, pn533_wq_rf);
3057         dev->wq = alloc_ordered_workqueue("pn533", 0);
3058         if (dev->wq == NULL)
3059                 goto error;
3060
3061         init_timer(&dev->listen_timer);
3062         dev->listen_timer.data = (unsigned long) dev;
3063         dev->listen_timer.function = pn533_listen_mode_timer;
3064
3065         skb_queue_head_init(&dev->resp_q);
3066         skb_queue_head_init(&dev->fragment_skb);
3067
3068         INIT_LIST_HEAD(&dev->cmd_queue);
3069
3070         usb_set_intfdata(interface, dev);
3071
3072         dev->ops = &pn533_std_frame_ops;
3073
3074         dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
3075         dev->device_type = id->driver_info;
3076         switch (dev->device_type) {
3077         case PN533_DEVICE_STD:
3078                 protocols = PN533_ALL_PROTOCOLS;
3079                 break;
3080
3081         case PN533_DEVICE_PASORI:
3082                 protocols = PN533_NO_TYPE_B_PROTOCOLS;
3083                 break;
3084
3085         case PN533_DEVICE_ACR122U:
3086                 protocols = PN533_NO_TYPE_B_PROTOCOLS;
3087                 dev->ops = &pn533_acr122_frame_ops;
3088                 dev->protocol_type = PN533_PROTO_REQ_RESP,
3089
3090                 rc = pn533_acr122_poweron_rdr(dev);
3091                 if (rc < 0) {
3092                         nfc_err(&dev->interface->dev,
3093                                 "Couldn't poweron the reader (error %d)\n", rc);
3094                         goto destroy_wq;
3095                 }
3096                 break;
3097
3098         default:
3099                 nfc_err(&dev->interface->dev, "Unknown device type %d\n",
3100                         dev->device_type);
3101                 rc = -EINVAL;
3102                 goto destroy_wq;
3103         }
3104
3105         memset(&fw_ver, 0, sizeof(fw_ver));
3106         rc = pn533_get_firmware_version(dev, &fw_ver);
3107         if (rc < 0)
3108                 goto destroy_wq;
3109
3110         nfc_info(&dev->interface->dev,
3111                  "NXP PN5%02X firmware ver %d.%d now attached\n",
3112                  fw_ver.ic, fw_ver.ver, fw_ver.rev);
3113
3114
3115         dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
3116                                            dev->ops->tx_header_len +
3117                                            PN533_CMD_DATAEXCH_HEAD_LEN,
3118                                            dev->ops->tx_tail_len);
3119         if (!dev->nfc_dev) {
3120                 rc = -ENOMEM;
3121                 goto destroy_wq;
3122         }
3123
3124         nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
3125         nfc_set_drvdata(dev->nfc_dev, dev);
3126
3127         rc = nfc_register_device(dev->nfc_dev);
3128         if (rc)
3129                 goto free_nfc_dev;
3130
3131         rc = pn533_setup(dev);
3132         if (rc)
3133                 goto unregister_nfc_dev;
3134
3135         return 0;
3136
3137 unregister_nfc_dev:
3138         nfc_unregister_device(dev->nfc_dev);
3139
3140 free_nfc_dev:
3141         nfc_free_device(dev->nfc_dev);
3142
3143 destroy_wq:
3144         destroy_workqueue(dev->wq);
3145 error:
3146         usb_free_urb(dev->in_urb);
3147         usb_free_urb(dev->out_urb);
3148         usb_put_dev(dev->udev);
3149         kfree(dev);
3150         return rc;
3151 }
3152
3153 static void pn533_disconnect(struct usb_interface *interface)
3154 {
3155         struct pn533 *dev;
3156         struct pn533_cmd *cmd, *n;
3157
3158         dev = usb_get_intfdata(interface);
3159         usb_set_intfdata(interface, NULL);
3160
3161         nfc_unregister_device(dev->nfc_dev);
3162         nfc_free_device(dev->nfc_dev);
3163
3164         usb_kill_urb(dev->in_urb);
3165         usb_kill_urb(dev->out_urb);
3166
3167         flush_delayed_work(&dev->poll_work);
3168         destroy_workqueue(dev->wq);
3169
3170         skb_queue_purge(&dev->resp_q);
3171
3172         del_timer(&dev->listen_timer);
3173
3174         list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
3175                 list_del(&cmd->queue);
3176                 kfree(cmd);
3177         }
3178
3179         usb_free_urb(dev->in_urb);
3180         usb_free_urb(dev->out_urb);
3181         kfree(dev);
3182
3183         nfc_info(&interface->dev, "NXP PN533 NFC device disconnected\n");
3184 }
3185
3186 static struct usb_driver pn533_driver = {
3187         .name =         "pn533",
3188         .probe =        pn533_probe,
3189         .disconnect =   pn533_disconnect,
3190         .id_table =     pn533_table,
3191 };
3192
3193 module_usb_driver(pn533_driver);
3194
3195 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
3196 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
3197 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
3198 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
3199 MODULE_VERSION(VERSION);
3200 MODULE_LICENSE("GPL");