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
  87 /* Standard pn533 frame definitions */
  88 #define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
  89                                         + 2) /* data[0] TFI, data[1] CC */
  90 #define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
  91
  92 /*
  93  * Max extended frame payload len, excluding TFI and CC
  94  * which are already in PN533_FRAME_HEADER_LEN.
  95  */
  96 #define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
  97
  98 #define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
  99                                   Postamble (1) */
 100 #define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
 101 #define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
 102
 103 /* start of frame */
 104 #define PN533_STD_FRAME_SOF 0x00FF
 105
 106 /* standard frame identifier: in/out/error */
 107 #define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
 108 #define PN533_STD_FRAME_DIR_OUT 0xD4
 109 #define PN533_STD_FRAME_DIR_IN 0xD5
 110
 111 /* ACS ACR122 pn533 frame definitions */
 112 #define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
 113                                           + 2)
 114 #define PN533_ACR122_TX_FRAME_TAIL_LEN 0
 115 #define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
 116                                           + 2)
 117 #define PN533_ACR122_RX_FRAME_TAIL_LEN 2
 118 #define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
 119
 120 /* CCID messages types */
 121 #define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
 122 #define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
 123
 124 #define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
 125
 126 /* PN533 Commands */
 127 #define PN533_STD_FRAME_CMD(f) (f->data[1])
 128
 129 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
 130 #define PN533_CMD_RF_CONFIGURATION 0x32
 131 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
 132 #define PN533_CMD_IN_COMM_THRU     0x42
 133 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
 134 #define PN533_CMD_IN_ATR 0x50
 135 #define PN533_CMD_IN_RELEASE 0x52
 136 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
 137
 138 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
 139 #define PN533_CMD_TG_GET_DATA 0x86
 140 #define PN533_CMD_TG_SET_DATA 0x8e
 141 #define PN533_CMD_UNDEF 0xff
 142
 143 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
 144
 145 /* PN533 Return codes */
 146 #define PN533_CMD_RET_MASK 0x3F
 147 #define PN533_CMD_MI_MASK 0x40
 148 #define PN533_CMD_RET_SUCCESS 0x00
 149
 150 struct pn533;
 151
 152 typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
 153                                         struct sk_buff *resp);
 154
 155 /* structs for pn533 commands */
 156
 157 /* PN533_CMD_GET_FIRMWARE_VERSION */
 158 struct pn533_fw_version {
 159         u8 ic;
 160         u8 ver;
 161         u8 rev;
 162         u8 support;
 163 };
 164
 165 /* PN533_CMD_RF_CONFIGURATION */
 166 #define PN533_CFGITEM_RF_FIELD    0x01
 167 #define PN533_CFGITEM_TIMING      0x02
 168 #define PN533_CFGITEM_MAX_RETRIES 0x05
 169 #define PN533_CFGITEM_PASORI      0x82
 170
 171 #define PN533_CFGITEM_RF_FIELD_ON  0x1
 172 #define PN533_CFGITEM_RF_FIELD_OFF 0x0
 173
 174 #define PN533_CONFIG_TIMING_102 0xb
 175 #define PN533_CONFIG_TIMING_204 0xc
 176 #define PN533_CONFIG_TIMING_409 0xd
 177 #define PN533_CONFIG_TIMING_819 0xe
 178
 179 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
 180 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
 181
 182 struct pn533_config_max_retries {
 183         u8 mx_rty_atr;
 184         u8 mx_rty_psl;
 185         u8 mx_rty_passive_act;
 186 } __packed;
 187
 188 struct pn533_config_timing {
 189         u8 rfu;
 190         u8 atr_res_timeout;
 191         u8 dep_timeout;
 192 } __packed;
 193
 194 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
 195
 196 /* felica commands opcode */
 197 #define PN533_FELICA_OPC_SENSF_REQ 0
 198 #define PN533_FELICA_OPC_SENSF_RES 1
 199 /* felica SENSF_REQ parameters */
 200 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
 201 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
 202 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
 203 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
 204
 205 /* type B initiator_data values */
 206 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
 207 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
 208 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
 209
 210 union pn533_cmd_poll_initdata {
 211         struct {
 212                 u8 afi;
 213                 u8 polling_method;
 214         } __packed type_b;
 215         struct {
 216                 u8 opcode;
 217                 __be16 sc;
 218                 u8 rc;
 219                 u8 tsn;
 220         } __packed felica;
 221 };
 222
 223 /* Poll modulations */
 224 enum {
 225         PN533_POLL_MOD_106KBPS_A,
 226         PN533_POLL_MOD_212KBPS_FELICA,
 227         PN533_POLL_MOD_424KBPS_FELICA,
 228         PN533_POLL_MOD_106KBPS_JEWEL,
 229         PN533_POLL_MOD_847KBPS_B,
 230         PN533_LISTEN_MOD,
 231
 232         __PN533_POLL_MOD_AFTER_LAST,
 233 };
 234 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
 235
 236 struct pn533_poll_modulations {
 237         struct {
 238                 u8 maxtg;
 239                 u8 brty;
 240                 union pn533_cmd_poll_initdata initiator_data;
 241         } __packed data;
 242         u8 len;
 243 };
 244
 245 static const struct pn533_poll_modulations poll_mod[] = {
 246         [PN533_POLL_MOD_106KBPS_A] = {
 247                 .data = {
 248                         .maxtg = 1,
 249                         .brty = 0,
 250                 },
 251                 .len = 2,
 252         },
 253         [PN533_POLL_MOD_212KBPS_FELICA] = {
 254                 .data = {
 255                         .maxtg = 1,
 256                         .brty = 1,
 257                         .initiator_data.felica = {
 258                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 259                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 260                                 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
 261                                 .tsn = 0,
 262                         },
 263                 },
 264                 .len = 7,
 265         },
 266         [PN533_POLL_MOD_424KBPS_FELICA] = {
 267                 .data = {
 268                         .maxtg = 1,
 269                         .brty = 2,
 270                         .initiator_data.felica = {
 271                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 272                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 273                                 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
 274                                 .tsn = 0,
 275                         },
 276                  },
 277                 .len = 7,
 278         },
 279         [PN533_POLL_MOD_106KBPS_JEWEL] = {
 280                 .data = {
 281                         .maxtg = 1,
 282                         .brty = 4,
 283                 },
 284                 .len = 2,
 285         },
 286         [PN533_POLL_MOD_847KBPS_B] = {
 287                 .data = {
 288                         .maxtg = 1,
 289                         .brty = 8,
 290                         .initiator_data.type_b = {
 291                                 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
 292                                 .polling_method =
 293                                         PN533_TYPE_B_POLL_METHOD_TIMESLOT,
 294                         },
 295                 },
 296                 .len = 3,
 297         },
 298         [PN533_LISTEN_MOD] = {
 299                 .len = 0,
 300         },
 301 };
 302
 303 /* PN533_CMD_IN_ATR */
 304
 305 struct pn533_cmd_activate_response {
 306         u8 status;
 307         u8 nfcid3t[10];
 308         u8 didt;
 309         u8 bst;
 310         u8 brt;
 311         u8 to;
 312         u8 ppt;
 313         /* optional */
 314         u8 gt[];
 315 } __packed;
 316
 317 struct pn533_cmd_jump_dep_response {
 318         u8 status;
 319         u8 tg;
 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
 331 /* PN533_TG_INIT_AS_TARGET */
 332 #define PN533_INIT_TARGET_PASSIVE 0x1
 333 #define PN533_INIT_TARGET_DEP 0x2
 334
 335 #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
 336 #define PN533_INIT_TARGET_RESP_ACTIVE     0x1
 337 #define PN533_INIT_TARGET_RESP_DEP        0x4
 338
 339 enum  pn533_protocol_type {
 340         PN533_PROTO_REQ_ACK_RESP = 0,
 341         PN533_PROTO_REQ_RESP
 342 };
 343
 344 struct pn533 {
 345         struct usb_device *udev;
 346         struct usb_interface *interface;
 347         struct nfc_dev *nfc_dev;
 348         u32 device_type;
 349         enum pn533_protocol_type protocol_type;
 350
 351         struct urb *out_urb;
 352         struct urb *in_urb;
 353
 354         struct sk_buff_head resp_q;
 355
 356         struct workqueue_struct *wq;
 357         struct work_struct cmd_work;
 358         struct work_struct cmd_complete_work;
 359         struct work_struct poll_work;
 360         struct work_struct mi_work;
 361         struct work_struct tg_work;
 362
 363         struct list_head cmd_queue;
 364         struct pn533_cmd *cmd;
 365         u8 cmd_pending;
 366         struct mutex cmd_lock;  /* protects cmd queue */
 367
 368         void *cmd_complete_mi_arg;
 369
 370         struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
 371         u8 poll_mod_count;
 372         u8 poll_mod_curr;
 373         u32 poll_protocols;
 374         u32 listen_protocols;
 375         struct timer_list listen_timer;
 376         int cancel_listen;
 377
 378         u8 *gb;
 379         size_t gb_len;
 380
 381         u8 tgt_available_prots;
 382         u8 tgt_active_prot;
 383         u8 tgt_mode;
 384
 385         struct pn533_frame_ops *ops;
 386 };
 387
 388 struct pn533_cmd {
 389         struct list_head queue;
 390         u8 code;
 391         int status;
 392         struct sk_buff *req;
 393         struct sk_buff *resp;
 394         int resp_len;
 395         pn533_send_async_complete_t  complete_cb;
 396         void *complete_cb_context;
 397 };
 398
 399 struct pn533_std_frame {
 400         u8 preamble;
 401         __be16 start_frame;
 402         u8 datalen;
 403         u8 datalen_checksum;
 404         u8 data[];
 405 } __packed;
 406
 407 struct pn533_frame_ops {
 408         void (*tx_frame_init)(void *frame, u8 cmd_code);
 409         void (*tx_frame_finish)(void *frame);
 410         void (*tx_update_payload_len)(void *frame, int len);
 411         int tx_header_len;
 412         int tx_tail_len;
 413
 414         bool (*rx_is_frame_valid)(void *frame);
 415         int (*rx_frame_size)(void *frame);
 416         int rx_header_len;
 417         int rx_tail_len;
 418
 419         int max_payload_len;
 420         u8 (*get_cmd_code)(void *frame);
 421 };
 422
 423 struct pn533_acr122_ccid_hdr {
 424         u8 type;
 425         u32 datalen;
 426         u8 slot;
 427         u8 seq;
 428         u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
 429                          byte for reposnse msg */
 430         u8 data[]; /* payload */
 431 } __packed;
 432
 433 struct pn533_acr122_apdu_hdr {
 434         u8 class;
 435         u8 ins;
 436         u8 p1;
 437         u8 p2;
 438 } __packed;
 439
 440 struct pn533_acr122_tx_frame {
 441         struct pn533_acr122_ccid_hdr ccid;
 442         struct pn533_acr122_apdu_hdr apdu;
 443         u8 datalen;
 444         u8 data[]; /* pn533 frame: TFI ... */
 445 } __packed;
 446
 447 struct pn533_acr122_rx_frame {
 448         struct pn533_acr122_ccid_hdr ccid;
 449         u8 data[]; /* pn533 frame : TFI ... */
 450 } __packed;
 451
 452 static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
 453 {
 454         struct pn533_acr122_tx_frame *frame = _frame;
 455
 456         frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
 457         frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
 458                                                           sizeof(datalen) */
 459         frame->ccid.slot = 0;
 460         frame->ccid.seq = 0;
 461         frame->ccid.params[0] = 0;
 462         frame->ccid.params[1] = 0;
 463         frame->ccid.params[2] = 0;
 464
 465         frame->data[0] = PN533_STD_FRAME_DIR_OUT;
 466         frame->data[1] = cmd_code;
 467         frame->datalen = 2;  /* data[0] + data[1] */
 468
 469         frame->apdu.class = 0xFF;
 470         frame->apdu.ins = 0;
 471         frame->apdu.p1 = 0;
 472         frame->apdu.p2 = 0;
 473 }
 474
 475 static void pn533_acr122_tx_frame_finish(void *_frame)
 476 {
 477         struct pn533_acr122_tx_frame *frame = _frame;
 478
 479         frame->ccid.datalen += frame->datalen;
 480 }
 481
 482 static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
 483 {
 484         struct pn533_acr122_tx_frame *frame = _frame;
 485
 486         frame->datalen += len;
 487 }
 488
 489 static bool pn533_acr122_is_rx_frame_valid(void *_frame)
 490 {
 491         struct pn533_acr122_rx_frame *frame = _frame;
 492
 493         if (frame->ccid.type != 0x83)
 494                 return false;
 495
 496         if (frame->data[frame->ccid.datalen - 2] == 0x63)
 497                 return false;
 498
 499         return true;
 500 }
 501
 502 static int pn533_acr122_rx_frame_size(void *frame)
 503 {
 504         struct pn533_acr122_rx_frame *f = frame;
 505
 506         /* f->ccid.datalen already includes tail length */
 507         return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
 508 }
 509
 510 static u8 pn533_acr122_get_cmd_code(void *frame)
 511 {
 512         struct pn533_acr122_rx_frame *f = frame;
 513
 514         return PN533_STD_FRAME_CMD(f);
 515 }
 516
 517 static struct pn533_frame_ops pn533_acr122_frame_ops = {
 518         .tx_frame_init = pn533_acr122_tx_frame_init,
 519         .tx_frame_finish = pn533_acr122_tx_frame_finish,
 520         .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
 521         .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
 522         .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
 523
 524         .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
 525         .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
 526         .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
 527         .rx_frame_size = pn533_acr122_rx_frame_size,
 528
 529         .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
 530         .get_cmd_code = pn533_acr122_get_cmd_code,
 531 };
 532
 533 /* The rule: value + checksum = 0 */
 534 static inline u8 pn533_std_checksum(u8 value)
 535 {
 536         return ~value + 1;
 537 }
 538
 539 /* The rule: sum(data elements) + checksum = 0 */
 540 static u8 pn533_std_data_checksum(u8 *data, int datalen)
 541 {
 542         u8 sum = 0;
 543         int i;
 544
 545         for (i = 0; i < datalen; i++)
 546                 sum += data[i];
 547
 548         return pn533_std_checksum(sum);
 549 }
 550
 551 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
 552 {
 553         struct pn533_std_frame *frame = _frame;
 554
 555         frame->preamble = 0;
 556         frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
 557         PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
 558         PN533_STD_FRAME_CMD(frame) = cmd_code;
 559         frame->datalen = 2;
 560 }
 561
 562 static void pn533_std_tx_frame_finish(void *_frame)
 563 {
 564         struct pn533_std_frame *frame = _frame;
 565
 566         frame->datalen_checksum = pn533_std_checksum(frame->datalen);
 567
 568         PN533_STD_FRAME_CHECKSUM(frame) =
 569                 pn533_std_data_checksum(frame->data, frame->datalen);
 570
 571         PN533_STD_FRAME_POSTAMBLE(frame) = 0;
 572 }
 573
 574 static void pn533_std_tx_update_payload_len(void *_frame, int len)
 575 {
 576         struct pn533_std_frame *frame = _frame;
 577
 578         frame->datalen += len;
 579 }
 580
 581 static bool pn533_std_rx_frame_is_valid(void *_frame)
 582 {
 583         u8 checksum;
 584         struct pn533_std_frame *frame = _frame;
 585
 586         if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
 587                 return false;
 588
 589         checksum = pn533_std_checksum(frame->datalen);
 590         if (checksum != frame->datalen_checksum)
 591                 return false;
 592
 593         checksum = pn533_std_data_checksum(frame->data, frame->datalen);
 594         if (checksum != PN533_STD_FRAME_CHECKSUM(frame))
 595                 return false;
 596
 597         return true;
 598 }
 599
 600 static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
 601 {
 602         if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
 603                 return false;
 604
 605         if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
 606                 return false;
 607
 608         return true;
 609 }
 610
 611 static inline int pn533_std_rx_frame_size(void *frame)
 612 {
 613         struct pn533_std_frame *f = frame;
 614
 615         return sizeof(struct pn533_std_frame) + f->datalen +
 616                PN533_STD_FRAME_TAIL_LEN;
 617 }
 618
 619 static u8 pn533_std_get_cmd_code(void *frame)
 620 {
 621         struct pn533_std_frame *f = frame;
 622
 623         return PN533_STD_FRAME_CMD(f);
 624 }
 625
 626 static struct pn533_frame_ops pn533_std_frame_ops = {
 627         .tx_frame_init = pn533_std_tx_frame_init,
 628         .tx_frame_finish = pn533_std_tx_frame_finish,
 629         .tx_update_payload_len = pn533_std_tx_update_payload_len,
 630         .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
 631         .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
 632
 633         .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
 634         .rx_frame_size = pn533_std_rx_frame_size,
 635         .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
 636         .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
 637
 638         .max_payload_len =  PN533_STD_FRAME_MAX_PAYLOAD_LEN,
 639         .get_cmd_code = pn533_std_get_cmd_code,
 640 };
 641
 642 static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
 643 {
 644         return (dev->ops->get_cmd_code(frame) ==
 645                                 PN533_CMD_RESPONSE(dev->cmd->code));
 646 }
 647
 648 static void pn533_recv_response(struct urb *urb)
 649 {
 650         struct pn533 *dev = urb->context;
 651         struct pn533_cmd *cmd = dev->cmd;
 652         u8 *in_frame;
 653
 654         cmd->status = urb->status;
 655
 656         switch (urb->status) {
 657         case 0:
 658                 break; /* success */
 659         case -ECONNRESET:
 660         case -ENOENT:
 661                 nfc_dev_dbg(&dev->interface->dev,
 662                             "The urb has been canceled (status %d)",
 663                             urb->status);
 664                 goto sched_wq;
 665         case -ESHUTDOWN:
 666         default:
 667                 nfc_dev_err(&dev->interface->dev,
 668                             "Urb failure (status %d)", urb->status);
 669                 goto sched_wq;
 670         }
 671
 672         in_frame = dev->in_urb->transfer_buffer;
 673
 674         nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
 675         print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
 676                              dev->ops->rx_frame_size(in_frame), false);
 677
 678         if (!dev->ops->rx_is_frame_valid(in_frame)) {
 679                 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
 680                 cmd->status = -EIO;
 681                 goto sched_wq;
 682         }
 683
 684         if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
 685                 nfc_dev_err(&dev->interface->dev,
 686                             "It it not the response to the last command");
 687                 cmd->status = -EIO;
 688                 goto sched_wq;
 689         }
 690
 691 sched_wq:
 692         queue_work(dev->wq, &dev->cmd_complete_work);
 693 }
 694
 695 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
 696 {
 697         dev->in_urb->complete = pn533_recv_response;
 698
 699         return usb_submit_urb(dev->in_urb, flags);
 700 }
 701
 702 static void pn533_recv_ack(struct urb *urb)
 703 {
 704         struct pn533 *dev = urb->context;
 705         struct pn533_cmd *cmd = dev->cmd;
 706         struct pn533_std_frame *in_frame;
 707         int rc;
 708
 709         cmd->status = urb->status;
 710
 711         switch (urb->status) {
 712         case 0:
 713                 break; /* success */
 714         case -ECONNRESET:
 715         case -ENOENT:
 716                 nfc_dev_dbg(&dev->interface->dev,
 717                             "The urb has been stopped (status %d)",
 718                             urb->status);
 719                 goto sched_wq;
 720         case -ESHUTDOWN:
 721         default:
 722                 nfc_dev_err(&dev->interface->dev,
 723                             "Urb failure (status %d)", urb->status);
 724                 goto sched_wq;
 725         }
 726
 727         in_frame = dev->in_urb->transfer_buffer;
 728
 729         if (!pn533_std_rx_frame_is_ack(in_frame)) {
 730                 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
 731                 cmd->status = -EIO;
 732                 goto sched_wq;
 733         }
 734
 735         rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
 736         if (rc) {
 737                 nfc_dev_err(&dev->interface->dev,
 738                             "usb_submit_urb failed with result %d", rc);
 739                 cmd->status = rc;
 740                 goto sched_wq;
 741         }
 742
 743         return;
 744
 745 sched_wq:
 746         queue_work(dev->wq, &dev->cmd_complete_work);
 747 }
 748
 749 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
 750 {
 751         dev->in_urb->complete = pn533_recv_ack;
 752
 753         return usb_submit_urb(dev->in_urb, flags);
 754 }
 755
 756 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
 757 {
 758         u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
 759         /* spec 7.1.1.3:  Preamble, SoPC (2), ACK Code (2), Postamble */
 760         int rc;
 761
 762         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 763
 764         dev->out_urb->transfer_buffer = ack;
 765         dev->out_urb->transfer_buffer_length = sizeof(ack);
 766         rc = usb_submit_urb(dev->out_urb, flags);
 767
 768         return rc;
 769 }
 770
 771 static int __pn533_send_frame_async(struct pn533 *dev,
 772                                         struct sk_buff *out,
 773                                         struct sk_buff *in,
 774                                         int in_len)
 775 {
 776         int rc;
 777
 778         dev->out_urb->transfer_buffer = out->data;
 779         dev->out_urb->transfer_buffer_length = out->len;
 780
 781         dev->in_urb->transfer_buffer = in->data;
 782         dev->in_urb->transfer_buffer_length = in_len;
 783
 784         print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
 785                              out->data, out->len, false);
 786
 787         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
 788         if (rc)
 789                 return rc;
 790
 791         if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
 792                 /* request for response for sent packet directly */
 793                 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
 794                 if (rc)
 795                         goto error;
 796         } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
 797                 /* request for ACK if that's the case */
 798                 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
 799                 if (rc)
 800                         goto error;
 801         }
 802
 803         return 0;
 804
 805 error:
 806         usb_unlink_urb(dev->out_urb);
 807         return rc;
 808 }
 809
 810 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
 811                                   struct sk_buff *skb)
 812 {
 813         /* payload is already there, just update datalen */
 814         int payload_len = skb->len;
 815         struct pn533_frame_ops *ops = dev->ops;
 816
 817
 818         skb_push(skb, ops->tx_header_len);
 819         skb_put(skb, ops->tx_tail_len);
 820
 821         ops->tx_frame_init(skb->data, cmd_code);
 822         ops->tx_update_payload_len(skb->data, payload_len);
 823         ops->tx_frame_finish(skb->data);
 824 }
 825
 826 static int pn533_send_async_complete(struct pn533 *dev)
 827 {
 828         struct pn533_cmd *cmd = dev->cmd;
 829         int status = cmd->status;
 830
 831         struct sk_buff *req = cmd->req;
 832         struct sk_buff *resp = cmd->resp;
 833
 834         int rc;
 835
 836         dev_kfree_skb(req);
 837
 838         if (status < 0) {
 839                 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
 840                                       ERR_PTR(status));
 841                 dev_kfree_skb(resp);
 842                 goto done;
 843         }
 844
 845         skb_put(resp, dev->ops->rx_frame_size(resp->data));
 846         skb_pull(resp, dev->ops->rx_header_len);
 847         skb_trim(resp, resp->len - dev->ops->rx_tail_len);
 848
 849         rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
 850
 851 done:
 852         kfree(cmd);
 853         dev->cmd = NULL;
 854         return rc;
 855 }
 856
 857 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
 858                               struct sk_buff *req, struct sk_buff *resp,
 859                               int resp_len,
 860                               pn533_send_async_complete_t complete_cb,
 861                               void *complete_cb_context)
 862 {
 863         struct pn533_cmd *cmd;
 864         int rc = 0;
 865
 866         nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
 867
 868         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 869         if (!cmd)
 870                 return -ENOMEM;
 871
 872         cmd->code = cmd_code;
 873         cmd->req = req;
 874         cmd->resp = resp;
 875         cmd->resp_len = resp_len;
 876         cmd->complete_cb = complete_cb;
 877         cmd->complete_cb_context = complete_cb_context;
 878
 879         pn533_build_cmd_frame(dev, cmd_code, req);
 880
 881         mutex_lock(&dev->cmd_lock);
 882
 883         if (!dev->cmd_pending) {
 884                 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
 885                 if (rc)
 886                         goto error;
 887
 888                 dev->cmd_pending = 1;
 889                 dev->cmd = cmd;
 890                 goto unlock;
 891         }
 892
 893         nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
 894                     cmd_code);
 895
 896         INIT_LIST_HEAD(&cmd->queue);
 897         list_add_tail(&cmd->queue, &dev->cmd_queue);
 898
 899         goto unlock;
 900
 901 error:
 902         kfree(cmd);
 903 unlock:
 904         mutex_unlock(&dev->cmd_lock);
 905         return rc;
 906 }
 907
 908 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
 909                                  struct sk_buff *req,
 910                                  pn533_send_async_complete_t complete_cb,
 911                                  void *complete_cb_context)
 912 {
 913         struct sk_buff *resp;
 914         int rc;
 915         int  resp_len = dev->ops->rx_header_len +
 916                         dev->ops->max_payload_len +
 917                         dev->ops->rx_tail_len;
 918
 919         resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
 920         if (!resp)
 921                 return -ENOMEM;
 922
 923         rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
 924                                 complete_cb_context);
 925         if (rc)
 926                 dev_kfree_skb(resp);
 927
 928         return rc;
 929 }
 930
 931 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
 932                                 struct sk_buff *req,
 933                                 pn533_send_async_complete_t complete_cb,
 934                                 void *complete_cb_context)
 935 {
 936         struct sk_buff *resp;
 937         int rc;
 938         int  resp_len = dev->ops->rx_header_len +
 939                         dev->ops->max_payload_len +
 940                         dev->ops->rx_tail_len;
 941
 942         resp = alloc_skb(resp_len, GFP_KERNEL);
 943         if (!resp)
 944                 return -ENOMEM;
 945
 946         rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
 947                                 complete_cb_context);
 948         if (rc)
 949                 dev_kfree_skb(resp);
 950
 951         return rc;
 952 }
 953
 954 /*
 955  * pn533_send_cmd_direct_async
 956  *
 957  * The function sends a piority cmd directly to the chip omiting the cmd
 958  * queue. It's intended to be used by chaining mechanism of received responses
 959  * where the host has to request every single chunk of data before scheduling
 960  * next cmd from the queue.
 961  */
 962 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
 963                                        struct sk_buff *req,
 964                                        pn533_send_async_complete_t complete_cb,
 965                                        void *complete_cb_context)
 966 {
 967         struct sk_buff *resp;
 968         struct pn533_cmd *cmd;
 969         int rc;
 970         int resp_len = dev->ops->rx_header_len +
 971                        dev->ops->max_payload_len +
 972                        dev->ops->rx_tail_len;
 973
 974         resp = alloc_skb(resp_len, GFP_KERNEL);
 975         if (!resp)
 976                 return -ENOMEM;
 977
 978         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 979         if (!cmd) {
 980                 dev_kfree_skb(resp);
 981                 return -ENOMEM;
 982         }
 983
 984         cmd->code = cmd_code;
 985         cmd->req = req;
 986         cmd->resp = resp;
 987         cmd->resp_len = resp_len;
 988         cmd->complete_cb = complete_cb;
 989         cmd->complete_cb_context = complete_cb_context;
 990
 991         pn533_build_cmd_frame(dev, cmd_code, req);
 992
 993         rc = __pn533_send_frame_async(dev, req, resp, resp_len);
 994         if (rc < 0) {
 995                 dev_kfree_skb(resp);
 996                 kfree(cmd);
 997         } else {
 998                 dev->cmd = cmd;
 999         }
1000
1001         return rc;
1002 }
1003
1004 static void pn533_wq_cmd_complete(struct work_struct *work)
1005 {
1006         struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1007         int rc;
1008
1009         rc = pn533_send_async_complete(dev);
1010         if (rc != -EINPROGRESS)
1011                 queue_work(dev->wq, &dev->cmd_work);
1012 }
1013
1014 static void pn533_wq_cmd(struct work_struct *work)
1015 {
1016         struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1017         struct pn533_cmd *cmd;
1018         int rc;
1019
1020         mutex_lock(&dev->cmd_lock);
1021
1022         if (list_empty(&dev->cmd_queue)) {
1023                 dev->cmd_pending = 0;
1024                 mutex_unlock(&dev->cmd_lock);
1025                 return;
1026         }
1027
1028         cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1029
1030         list_del(&cmd->queue);
1031
1032         mutex_unlock(&dev->cmd_lock);
1033
1034         rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
1035         if (rc < 0) {
1036                 dev_kfree_skb(cmd->req);
1037                 dev_kfree_skb(cmd->resp);
1038                 kfree(cmd);
1039                 return;
1040         }
1041
1042         dev->cmd = cmd;
1043 }
1044
1045 struct pn533_sync_cmd_response {
1046         struct sk_buff *resp;
1047         struct completion done;
1048 };
1049
1050 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1051                                     struct sk_buff *resp)
1052 {
1053         struct pn533_sync_cmd_response *arg = _arg;
1054
1055         arg->resp = resp;
1056         complete(&arg->done);
1057
1058         return 0;
1059 }
1060
1061 /*  pn533_send_cmd_sync
1062  *
1063  *  Please note the req parameter is freed inside the function to
1064  *  limit a number of return value interpretations by the caller.
1065  *
1066  *  1. negative in case of error during TX path -> req should be freed
1067  *
1068  *  2. negative in case of error during RX path -> req should not be freed
1069  *     as it's been already freed at the begining of RX path by
1070  *     async_complete_cb.
1071  *
1072  *  3. valid pointer in case of succesfult RX path
1073  *
1074  *  A caller has to check a return value with IS_ERR macro. If the test pass,
1075  *  the returned pointer is valid.
1076  *
1077  * */
1078 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1079                                                struct sk_buff *req)
1080 {
1081         int rc;
1082         struct pn533_sync_cmd_response arg;
1083
1084         init_completion(&arg.done);
1085
1086         rc = pn533_send_cmd_async(dev, cmd_code, req,
1087                                   pn533_send_sync_complete, &arg);
1088         if (rc) {
1089                 dev_kfree_skb(req);
1090                 return ERR_PTR(rc);
1091         }
1092
1093         wait_for_completion(&arg.done);
1094
1095         return arg.resp;
1096 }
1097
1098 static void pn533_send_complete(struct urb *urb)
1099 {
1100         struct pn533 *dev = urb->context;
1101
1102         switch (urb->status) {
1103         case 0:
1104                 break; /* success */
1105         case -ECONNRESET:
1106         case -ENOENT:
1107                 nfc_dev_dbg(&dev->interface->dev,
1108                             "The urb has been stopped (status %d)",
1109                             urb->status);
1110                 break;
1111         case -ESHUTDOWN:
1112         default:
1113                 nfc_dev_err(&dev->interface->dev,
1114                             "Urb failure (status %d)", urb->status);
1115         }
1116 }
1117
1118 static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1119 {
1120         /* ACR122U does not support any command which aborts last
1121          * issued command i.e. as ACK for standard PN533. Additionally,
1122          * it behaves stange, sending broken or incorrect responses,
1123          * when we cancel urb before the chip will send response.
1124          */
1125         if (dev->device_type == PN533_DEVICE_ACR122U)
1126                 return;
1127
1128         /* An ack will cancel the last issued command */
1129         pn533_send_ack(dev, flags);
1130
1131         /* cancel the urb request */
1132         usb_kill_urb(dev->in_urb);
1133 }
1134
1135 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
1136 {
1137         struct sk_buff *skb;
1138
1139         skb = alloc_skb(dev->ops->tx_header_len +
1140                         size +
1141                         dev->ops->tx_tail_len, GFP_KERNEL);
1142
1143         if (skb)
1144                 skb_reserve(skb, dev->ops->tx_header_len);
1145
1146         return skb;
1147 }
1148
1149 struct pn533_target_type_a {
1150         __be16 sens_res;
1151         u8 sel_res;
1152         u8 nfcid_len;
1153         u8 nfcid_data[];
1154 } __packed;
1155
1156
1157 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1158 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1159 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1160
1161 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1162 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1163
1164 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1165 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1166
1167 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
1168 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
1169 #define PN533_TYPE_A_SEL_PROT_DEP 2
1170 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1171
1172 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1173                                                         int target_data_len)
1174 {
1175         u8 ssd;
1176         u8 platconf;
1177
1178         if (target_data_len < sizeof(struct pn533_target_type_a))
1179                 return false;
1180
1181         /* The lenght check of nfcid[] and ats[] are not being performed because
1182            the values are not being used */
1183
1184         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1185         ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1186         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1187
1188         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1189              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1190             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1191              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1192                 return false;
1193
1194         /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1195         if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1196                 return false;
1197
1198         return true;
1199 }
1200
1201 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1202                                                         int tgt_data_len)
1203 {
1204         struct pn533_target_type_a *tgt_type_a;
1205
1206         tgt_type_a = (struct pn533_target_type_a *)tgt_data;
1207
1208         if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1209                 return -EPROTO;
1210
1211         switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1212         case PN533_TYPE_A_SEL_PROT_MIFARE:
1213                 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1214                 break;
1215         case PN533_TYPE_A_SEL_PROT_ISO14443:
1216                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1217                 break;
1218         case PN533_TYPE_A_SEL_PROT_DEP:
1219                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1220                 break;
1221         case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1222                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1223                                                         NFC_PROTO_NFC_DEP_MASK;
1224                 break;
1225         }
1226
1227         nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1228         nfc_tgt->sel_res = tgt_type_a->sel_res;
1229         nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1230         memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
1231
1232         return 0;
1233 }
1234
1235 struct pn533_target_felica {
1236         u8 pol_res;
1237         u8 opcode;
1238         u8 nfcid2[8];
1239         u8 pad[8];
1240         /* optional */
1241         u8 syst_code[];
1242 } __packed;
1243
1244 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1245 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1246
1247 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1248                                                         int target_data_len)
1249 {
1250         if (target_data_len < sizeof(struct pn533_target_felica))
1251                 return false;
1252
1253         if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1254                 return false;
1255
1256         return true;
1257 }
1258
1259 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1260                                                         int tgt_data_len)
1261 {
1262         struct pn533_target_felica *tgt_felica;
1263
1264         tgt_felica = (struct pn533_target_felica *)tgt_data;
1265
1266         if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1267                 return -EPROTO;
1268
1269         if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1270             (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
1271                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1272         else
1273                 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1274
1275         memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1276         nfc_tgt->sensf_res_len = 9;
1277
1278         return 0;
1279 }
1280
1281 struct pn533_target_jewel {
1282         __be16 sens_res;
1283         u8 jewelid[4];
1284 } __packed;
1285
1286 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1287                                                         int target_data_len)
1288 {
1289         u8 ssd;
1290         u8 platconf;
1291
1292         if (target_data_len < sizeof(struct pn533_target_jewel))
1293                 return false;
1294
1295         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1296         ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1297         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1298
1299         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1300              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1301             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1302              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1303                 return false;
1304
1305         return true;
1306 }
1307
1308 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1309                                                         int tgt_data_len)
1310 {
1311         struct pn533_target_jewel *tgt_jewel;
1312
1313         tgt_jewel = (struct pn533_target_jewel *)tgt_data;
1314
1315         if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1316                 return -EPROTO;
1317
1318         nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1319         nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
1320         nfc_tgt->nfcid1_len = 4;
1321         memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
1322
1323         return 0;
1324 }
1325
1326 struct pn533_type_b_prot_info {
1327         u8 bitrate;
1328         u8 fsci_type;
1329         u8 fwi_adc_fo;
1330 } __packed;
1331
1332 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1333 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1334 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1335
1336 struct pn533_type_b_sens_res {
1337         u8 opcode;
1338         u8 nfcid[4];
1339         u8 appdata[4];
1340         struct pn533_type_b_prot_info prot_info;
1341 } __packed;
1342
1343 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1344
1345 struct pn533_target_type_b {
1346         struct pn533_type_b_sens_res sensb_res;
1347         u8 attrib_res_len;
1348         u8 attrib_res[];
1349 } __packed;
1350
1351 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1352                                                         int target_data_len)
1353 {
1354         if (target_data_len < sizeof(struct pn533_target_type_b))
1355                 return false;
1356
1357         if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1358                 return false;
1359
1360         if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1361                                                 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1362                 return false;
1363
1364         return true;
1365 }
1366
1367 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1368                                                         int tgt_data_len)
1369 {
1370         struct pn533_target_type_b *tgt_type_b;
1371
1372         tgt_type_b = (struct pn533_target_type_b *)tgt_data;
1373
1374         if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1375                 return -EPROTO;
1376
1377         nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1378
1379         return 0;
1380 }
1381
1382 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1383                               int tgdata_len)
1384 {
1385         struct nfc_target nfc_tgt;
1386         int rc;
1387
1388         nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
1389                     dev->poll_mod_curr);
1390
1391         if (tg != 1)
1392                 return -EPROTO;
1393
1394         memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1395
1396         switch (dev->poll_mod_curr) {
1397         case PN533_POLL_MOD_106KBPS_A:
1398                 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
1399                 break;
1400         case PN533_POLL_MOD_212KBPS_FELICA:
1401         case PN533_POLL_MOD_424KBPS_FELICA:
1402                 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
1403                 break;
1404         case PN533_POLL_MOD_106KBPS_JEWEL:
1405                 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
1406                 break;
1407         case PN533_POLL_MOD_847KBPS_B:
1408                 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
1409                 break;
1410         default:
1411                 nfc_dev_err(&dev->interface->dev,
1412                             "Unknown current poll modulation");
1413                 return -EPROTO;
1414         }
1415
1416         if (rc)
1417                 return rc;
1418
1419         if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1420                 nfc_dev_dbg(&dev->interface->dev,
1421                             "The Tg found doesn't have the desired protocol");
1422                 return -EAGAIN;
1423         }
1424
1425         nfc_dev_dbg(&dev->interface->dev,
1426                     "Target found - supported protocols: 0x%x",
1427                     nfc_tgt.supported_protocols);
1428
1429         dev->tgt_available_prots = nfc_tgt.supported_protocols;
1430
1431         nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1432
1433         return 0;
1434 }
1435
1436 static inline void pn533_poll_next_mod(struct pn533 *dev)
1437 {
1438         dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1439 }
1440
1441 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1442 {
1443         dev->poll_mod_count = 0;
1444 }
1445
1446 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1447 {
1448         dev->poll_mod_active[dev->poll_mod_count] =
1449                 (struct pn533_poll_modulations *)&poll_mod[mod_index];
1450         dev->poll_mod_count++;
1451 }
1452
1453 static void pn533_poll_create_mod_list(struct pn533 *dev,
1454                                        u32 im_protocols, u32 tm_protocols)
1455 {
1456         pn533_poll_reset_mod_list(dev);
1457
1458         if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1459             (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1460             (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1461                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1462
1463         if (im_protocols & NFC_PROTO_FELICA_MASK ||
1464             im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1465                 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1466                 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1467         }
1468
1469         if (im_protocols & NFC_PROTO_JEWEL_MASK)
1470                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1471
1472         if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1473                 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1474
1475         if (tm_protocols)
1476                 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1477 }
1478
1479 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
1480 {
1481         u8 nbtg, tg, *tgdata;
1482         int rc, tgdata_len;
1483
1484         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1485
1486         nbtg = resp->data[0];
1487         tg = resp->data[1];
1488         tgdata = &resp->data[2];
1489         tgdata_len = resp->len - 2;  /* nbtg + tg */
1490
1491         if (nbtg) {
1492                 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1493
1494                 /* We must stop the poll after a valid target found */
1495                 if (rc == 0) {
1496                         pn533_poll_reset_mod_list(dev);
1497                         return 0;
1498                 }
1499         }
1500
1501         return -EAGAIN;
1502 }
1503
1504 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1505 {
1506         struct sk_buff *skb;
1507         u8 *felica, *nfcid3, *gb;
1508
1509         u8 *gbytes = dev->gb;
1510         size_t gbytes_len = dev->gb_len;
1511
1512         u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1513                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1514                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1515                                 0xff, 0xff}; /* System code */
1516
1517         u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1518                                0x0, 0x0, 0x0,
1519                                0x40}; /* SEL_RES for DEP */
1520
1521         unsigned int skb_len = 36 + /* mode (1), mifare (6),
1522                                        felica (18), nfcid3 (10), gb_len (1) */
1523                                gbytes_len +
1524                                1;  /* len Tk*/
1525
1526         skb = pn533_alloc_skb(dev, skb_len);
1527         if (!skb)
1528                 return NULL;
1529
1530         /* DEP support only */
1531         *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
1532
1533         /* MIFARE params */
1534         memcpy(skb_put(skb, 6), mifare_params, 6);
1535
1536         /* Felica params */
1537         felica = skb_put(skb, 18);
1538         memcpy(felica, felica_params, 18);
1539         get_random_bytes(felica + 2, 6);
1540
1541         /* NFCID3 */
1542         nfcid3 = skb_put(skb, 10);
1543         memset(nfcid3, 0, 10);
1544         memcpy(nfcid3, felica, 8);
1545
1546         /* General bytes */
1547         *skb_put(skb, 1) = gbytes_len;
1548
1549         gb = skb_put(skb, gbytes_len);
1550         memcpy(gb, gbytes, gbytes_len);
1551
1552         /* Len Tk */
1553         *skb_put(skb, 1) = 0;
1554
1555         return skb;
1556 }
1557
1558 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
1559 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1560 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1561                                       struct sk_buff *resp)
1562 {
1563         u8 status;
1564
1565         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1566
1567         if (IS_ERR(resp))
1568                 return PTR_ERR(resp);
1569
1570         status = resp->data[0];
1571         skb_pull(resp, sizeof(status));
1572
1573         if (status != 0) {
1574                 nfc_tm_deactivated(dev->nfc_dev);
1575                 dev->tgt_mode = 0;
1576                 dev_kfree_skb(resp);
1577                 return 0;
1578         }
1579
1580         return nfc_tm_data_received(dev->nfc_dev, resp);
1581 }
1582
1583 static void pn533_wq_tg_get_data(struct work_struct *work)
1584 {
1585         struct pn533 *dev = container_of(work, struct pn533, tg_work);
1586
1587         struct sk_buff *skb;
1588         int rc;
1589
1590         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1591
1592         skb = pn533_alloc_skb(dev, 0);
1593         if (!skb)
1594                 return;
1595
1596         rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1597                                    pn533_tm_get_data_complete, NULL);
1598
1599         if (rc < 0)
1600                 dev_kfree_skb(skb);
1601
1602         return;
1603 }
1604
1605 #define ATR_REQ_GB_OFFSET 17
1606 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1607 {
1608         u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1609         size_t gb_len;
1610         int rc;
1611
1612         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1613
1614         if (resp->len < ATR_REQ_GB_OFFSET + 1)
1615                 return -EINVAL;
1616
1617         mode = resp->data[0];
1618         cmd = &resp->data[1];
1619
1620         nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1621                     mode, resp->len);
1622
1623         if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1624             PN533_INIT_TARGET_RESP_ACTIVE)
1625                 comm_mode = NFC_COMM_ACTIVE;
1626
1627         if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0)  /* Only DEP supported */
1628                 return -EOPNOTSUPP;
1629
1630         gb = cmd + ATR_REQ_GB_OFFSET;
1631         gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1632
1633         rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1634                               comm_mode, gb, gb_len);
1635         if (rc < 0) {
1636                 nfc_dev_err(&dev->interface->dev,
1637                             "Error when signaling target activation");
1638                 return rc;
1639         }
1640
1641         dev->tgt_mode = 1;
1642         queue_work(dev->wq, &dev->tg_work);
1643
1644         return 0;
1645 }
1646
1647 static void pn533_listen_mode_timer(unsigned long data)
1648 {
1649         struct pn533 *dev = (struct pn533 *)data;
1650
1651         nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1652
1653         dev->cancel_listen = 1;
1654
1655         pn533_poll_next_mod(dev);
1656
1657         queue_work(dev->wq, &dev->poll_work);
1658 }
1659
1660 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1661                                struct sk_buff *resp)
1662 {
1663         struct pn533_poll_modulations *cur_mod;
1664         int rc;
1665
1666         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1667
1668         if (IS_ERR(resp)) {
1669                 rc = PTR_ERR(resp);
1670
1671                 nfc_dev_err(&dev->interface->dev, "%s  Poll complete error %d",
1672                             __func__, rc);
1673
1674                 if (rc == -ENOENT) {
1675                         if (dev->poll_mod_count != 0)
1676                                 return rc;
1677                         else
1678                                 goto stop_poll;
1679                 } else if (rc < 0) {
1680                         nfc_dev_err(&dev->interface->dev,
1681                                     "Error %d when running poll", rc);
1682                         goto stop_poll;
1683                 }
1684         }
1685
1686         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1687
1688         if (cur_mod->len == 0) { /* Target mode */
1689                 del_timer(&dev->listen_timer);
1690                 rc = pn533_init_target_complete(dev, resp);
1691                 goto done;
1692         }
1693
1694         /* Initiator mode */
1695         rc = pn533_start_poll_complete(dev, resp);
1696         if (!rc)
1697                 goto done;
1698
1699         if (!dev->poll_mod_count) {
1700                 nfc_dev_dbg(&dev->interface->dev, "Polling has been stopped.");
1701                 goto done;
1702         }
1703
1704         pn533_poll_next_mod(dev);
1705         queue_work(dev->wq, &dev->poll_work);
1706
1707 done:
1708         dev_kfree_skb(resp);
1709         return rc;
1710
1711 stop_poll:
1712         nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1713
1714         pn533_poll_reset_mod_list(dev);
1715         dev->poll_protocols = 0;
1716         return rc;
1717 }
1718
1719 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1720                                         struct pn533_poll_modulations *mod)
1721 {
1722         struct sk_buff *skb;
1723
1724         skb = pn533_alloc_skb(dev, mod->len);
1725         if (!skb)
1726                 return NULL;
1727
1728         memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
1729
1730         return skb;
1731 }
1732
1733 static int pn533_send_poll_frame(struct pn533 *dev)
1734 {
1735         struct pn533_poll_modulations *mod;
1736         struct sk_buff *skb;
1737         int rc;
1738         u8 cmd_code;
1739
1740         mod = dev->poll_mod_active[dev->poll_mod_curr];
1741
1742         nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1743                     __func__, mod->len);
1744
1745         if (mod->len == 0) {  /* Listen mode */
1746                 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1747                 skb = pn533_alloc_poll_tg_frame(dev);
1748         } else {  /* Polling mode */
1749                 cmd_code =  PN533_CMD_IN_LIST_PASSIVE_TARGET;
1750                 skb = pn533_alloc_poll_in_frame(dev, mod);
1751         }
1752
1753         if (!skb) {
1754                 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1755                 return -ENOMEM;
1756         }
1757
1758         rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1759                                   NULL);
1760         if (rc < 0) {
1761                 dev_kfree_skb(skb);
1762                 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
1763         }
1764
1765         return rc;
1766 }
1767
1768 static void pn533_wq_poll(struct work_struct *work)
1769 {
1770         struct pn533 *dev = container_of(work, struct pn533, poll_work);
1771         struct pn533_poll_modulations *cur_mod;
1772         int rc;
1773
1774         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1775
1776         nfc_dev_dbg(&dev->interface->dev,
1777                     "%s cancel_listen %d modulation len %d",
1778                     __func__, dev->cancel_listen, cur_mod->len);
1779
1780         if (dev->cancel_listen == 1) {
1781                 dev->cancel_listen = 0;
1782                 pn533_abort_cmd(dev, GFP_ATOMIC);
1783         }
1784
1785         rc = pn533_send_poll_frame(dev);
1786         if (rc)
1787                 return;
1788
1789         if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1790                 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1791
1792         return;
1793 }
1794
1795 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1796                             u32 im_protocols, u32 tm_protocols)
1797 {
1798         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1799
1800         nfc_dev_dbg(&dev->interface->dev,
1801                     "%s: im protocols 0x%x tm protocols 0x%x",
1802                     __func__, im_protocols, tm_protocols);
1803
1804         if (dev->tgt_active_prot) {
1805                 nfc_dev_err(&dev->interface->dev,
1806                             "Cannot poll with a target already activated");
1807                 return -EBUSY;
1808         }
1809
1810         if (dev->tgt_mode) {
1811                 nfc_dev_err(&dev->interface->dev,
1812                             "Cannot poll while already being activated");
1813                 return -EBUSY;
1814         }
1815
1816         if (tm_protocols) {
1817                 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1818                 if (dev->gb == NULL)
1819                         tm_protocols = 0;
1820         }
1821
1822         dev->poll_mod_curr = 0;
1823         pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1824         dev->poll_protocols = im_protocols;
1825         dev->listen_protocols = tm_protocols;
1826
1827         return pn533_send_poll_frame(dev);
1828 }
1829
1830 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1831 {
1832         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1833
1834         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1835
1836         del_timer(&dev->listen_timer);
1837
1838         if (!dev->poll_mod_count) {
1839                 nfc_dev_dbg(&dev->interface->dev,
1840                             "Polling operation was not running");
1841                 return;
1842         }
1843
1844         pn533_abort_cmd(dev, GFP_KERNEL);
1845         pn533_poll_reset_mod_list(dev);
1846 }
1847
1848 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1849 {
1850         struct pn533_cmd_activate_response *rsp;
1851         u16 gt_len;
1852         int rc;
1853
1854         struct sk_buff *skb;
1855         struct sk_buff *resp;
1856
1857         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1858
1859         skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1860         if (!skb)
1861                 return -ENOMEM;
1862
1863         *skb_put(skb, sizeof(u8)) = 1; /* TG */
1864         *skb_put(skb, sizeof(u8)) = 0; /* Next */
1865
1866         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1867         if (IS_ERR(resp))
1868                 return PTR_ERR(resp);
1869
1870         rsp = (struct pn533_cmd_activate_response *)resp->data;
1871         rc = rsp->status & PN533_CMD_RET_MASK;
1872         if (rc != PN533_CMD_RET_SUCCESS) {
1873                 nfc_dev_err(&dev->interface->dev,
1874                             "Target activation failed (error 0x%x)", rc);
1875                 dev_kfree_skb(resp);
1876                 return -EIO;
1877         }
1878
1879         /* ATR_RES general bytes are located at offset 16 */
1880         gt_len = resp->len - 16;
1881         rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1882
1883         dev_kfree_skb(resp);
1884         return rc;
1885 }
1886
1887 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1888                                  struct nfc_target *target, u32 protocol)
1889 {
1890         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1891         int rc;
1892
1893         nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1894                     protocol);
1895
1896         if (dev->poll_mod_count) {
1897                 nfc_dev_err(&dev->interface->dev,
1898                             "Cannot activate while polling");
1899                 return -EBUSY;
1900         }
1901
1902         if (dev->tgt_active_prot) {
1903                 nfc_dev_err(&dev->interface->dev,
1904                             "There is already an active target");
1905                 return -EBUSY;
1906         }
1907
1908         if (!dev->tgt_available_prots) {
1909                 nfc_dev_err(&dev->interface->dev,
1910                             "There is no available target to activate");
1911                 return -EINVAL;
1912         }
1913
1914         if (!(dev->tgt_available_prots & (1 << protocol))) {
1915                 nfc_dev_err(&dev->interface->dev,
1916                             "Target doesn't support requested proto %u",
1917                             protocol);
1918                 return -EINVAL;
1919         }
1920
1921         if (protocol == NFC_PROTO_NFC_DEP) {
1922                 rc = pn533_activate_target_nfcdep(dev);
1923                 if (rc) {
1924                         nfc_dev_err(&dev->interface->dev,
1925                                     "Activating target with DEP failed %d", rc);
1926                         return rc;
1927                 }
1928         }
1929
1930         dev->tgt_active_prot = protocol;
1931         dev->tgt_available_prots = 0;
1932
1933         return 0;
1934 }
1935
1936 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1937                                     struct nfc_target *target)
1938 {
1939         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1940
1941         struct sk_buff *skb;
1942         struct sk_buff *resp;
1943
1944         int rc;
1945
1946         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1947
1948         if (!dev->tgt_active_prot) {
1949                 nfc_dev_err(&dev->interface->dev, "There is no active target");
1950                 return;
1951         }
1952
1953         dev->tgt_active_prot = 0;
1954         skb_queue_purge(&dev->resp_q);
1955
1956         skb = pn533_alloc_skb(dev, sizeof(u8));
1957         if (!skb)
1958                 return;
1959
1960         *skb_put(skb, 1) = 1; /* TG*/
1961
1962         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1963         if (IS_ERR(resp))
1964                 return;
1965
1966         rc = resp->data[0] & PN533_CMD_RET_MASK;
1967         if (rc != PN533_CMD_RET_SUCCESS)
1968                 nfc_dev_err(&dev->interface->dev,
1969                             "Error 0x%x when releasing the target", rc);
1970
1971         dev_kfree_skb(resp);
1972         return;
1973 }
1974
1975
1976 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1977                                          struct sk_buff *resp)
1978 {
1979         struct pn533_cmd_jump_dep_response *rsp;
1980         u8 target_gt_len;
1981         int rc;
1982         u8 active = *(u8 *)arg;
1983
1984         kfree(arg);
1985
1986         if (IS_ERR(resp))
1987                 return PTR_ERR(resp);
1988
1989         if (dev->tgt_available_prots &&
1990             !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1991                 nfc_dev_err(&dev->interface->dev,
1992                             "The target does not support DEP");
1993                 rc =  -EINVAL;
1994                 goto error;
1995         }
1996
1997         rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1998
1999         rc = rsp->status & PN533_CMD_RET_MASK;
2000         if (rc != PN533_CMD_RET_SUCCESS) {
2001                 nfc_dev_err(&dev->interface->dev,
2002                             "Bringing DEP link up failed (error 0x%x)", rc);
2003                 goto error;
2004         }
2005
2006         if (!dev->tgt_available_prots) {
2007                 struct nfc_target nfc_target;
2008
2009                 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
2010
2011                 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2012                 nfc_target.nfcid1_len = 10;
2013                 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
2014                 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2015                 if (rc)
2016                         goto error;
2017
2018                 dev->tgt_available_prots = 0;
2019         }
2020
2021         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2022
2023         /* ATR_RES general bytes are located at offset 17 */
2024         target_gt_len = resp->len - 17;
2025         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
2026                                           rsp->gt, target_gt_len);
2027         if (rc == 0)
2028                 rc = nfc_dep_link_is_up(dev->nfc_dev,
2029                                         dev->nfc_dev->targets[0].idx,
2030                                         !active, NFC_RF_INITIATOR);
2031
2032 error:
2033         dev_kfree_skb(resp);
2034         return rc;
2035 }
2036
2037 static int pn533_mod_to_baud(struct pn533 *dev)
2038 {
2039         switch (dev->poll_mod_curr) {
2040         case PN533_POLL_MOD_106KBPS_A:
2041                 return 0;
2042         case PN533_POLL_MOD_212KBPS_FELICA:
2043                 return 1;
2044         case PN533_POLL_MOD_424KBPS_FELICA:
2045                 return 2;
2046         default:
2047                 return -EINVAL;
2048         }
2049 }
2050
2051 #define PASSIVE_DATA_LEN 5
2052 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
2053                              u8 comm_mode, u8 *gb, size_t gb_len)
2054 {
2055         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2056         struct sk_buff *skb;
2057         int rc, baud, skb_len;
2058         u8 *next, *arg;
2059
2060         u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
2061
2062         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2063
2064         if (dev->poll_mod_count) {
2065                 nfc_dev_err(&dev->interface->dev,
2066                             "Cannot bring the DEP link up while polling");
2067                 return -EBUSY;
2068         }
2069
2070         if (dev->tgt_active_prot) {
2071                 nfc_dev_err(&dev->interface->dev,
2072                             "There is already an active target");
2073                 return -EBUSY;
2074         }
2075
2076         baud = pn533_mod_to_baud(dev);
2077         if (baud < 0) {
2078                 nfc_dev_err(&dev->interface->dev,
2079                             "Invalid curr modulation %d", dev->poll_mod_curr);
2080                 return baud;
2081         }
2082
2083         skb_len = 3 + gb_len; /* ActPass + BR + Next */
2084         if (comm_mode == NFC_COMM_PASSIVE)
2085                 skb_len += PASSIVE_DATA_LEN;
2086
2087         skb = pn533_alloc_skb(dev, skb_len);
2088         if (!skb)
2089                 return -ENOMEM;
2090
2091         *skb_put(skb, 1) = !comm_mode;  /* ActPass */
2092         *skb_put(skb, 1) = baud;  /* Baud rate */
2093
2094         next = skb_put(skb, 1);  /* Next */
2095         *next = 0;
2096
2097         if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
2098                 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
2099                        PASSIVE_DATA_LEN);
2100                 *next |= 1;
2101         }
2102
2103         if (gb != NULL && gb_len > 0) {
2104                 memcpy(skb_put(skb, gb_len), gb, gb_len);
2105                 *next |= 4; /* We have some Gi */
2106         } else {
2107                 *next = 0;
2108         }
2109
2110         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2111         if (!arg) {
2112                 dev_kfree_skb(skb);
2113                 return -ENOMEM;
2114         }
2115
2116         *arg = !comm_mode;
2117
2118         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2119                                   pn533_in_dep_link_up_complete, arg);
2120
2121         if (rc < 0) {
2122                 dev_kfree_skb(skb);
2123                 kfree(arg);
2124         }
2125
2126         return rc;
2127 }
2128
2129 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2130 {
2131         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2132
2133         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2134
2135         pn533_poll_reset_mod_list(dev);
2136
2137         if (dev->tgt_mode || dev->tgt_active_prot)
2138                 pn533_abort_cmd(dev, GFP_KERNEL);
2139
2140         dev->tgt_active_prot = 0;
2141         dev->tgt_mode = 0;
2142
2143         skb_queue_purge(&dev->resp_q);
2144
2145         return 0;
2146 }
2147
2148 struct pn533_data_exchange_arg {
2149         data_exchange_cb_t cb;
2150         void *cb_context;
2151 };
2152
2153 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2154 {
2155         struct sk_buff *skb, *tmp, *t;
2156         unsigned int skb_len = 0, tmp_len = 0;
2157
2158         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2159
2160         if (skb_queue_empty(&dev->resp_q))
2161                 return NULL;
2162
2163         if (skb_queue_len(&dev->resp_q) == 1) {
2164                 skb = skb_dequeue(&dev->resp_q);
2165                 goto out;
2166         }
2167
2168         skb_queue_walk_safe(&dev->resp_q, tmp, t)
2169                 skb_len += tmp->len;
2170
2171         nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2172                     __func__, skb_len);
2173
2174         skb = alloc_skb(skb_len, GFP_KERNEL);
2175         if (skb == NULL)
2176                 goto out;
2177
2178         skb_put(skb, skb_len);
2179
2180         skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2181                 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2182                 tmp_len += tmp->len;
2183         }
2184
2185 out:
2186         skb_queue_purge(&dev->resp_q);
2187
2188         return skb;
2189 }
2190
2191 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2192                                         struct sk_buff *resp)
2193 {
2194         struct pn533_data_exchange_arg *arg = _arg;
2195         struct sk_buff *skb;
2196         int rc = 0;
2197         u8 status, ret, mi;
2198
2199         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2200
2201         if (IS_ERR(resp)) {
2202                 rc = PTR_ERR(resp);
2203                 goto _error;
2204         }
2205
2206         status = resp->data[0];
2207         ret = status & PN533_CMD_RET_MASK;
2208         mi = status & PN533_CMD_MI_MASK;
2209
2210         skb_pull(resp, sizeof(status));
2211
2212         if (ret != PN533_CMD_RET_SUCCESS) {
2213                 nfc_dev_err(&dev->interface->dev,
2214                             "Exchanging data failed (error 0x%x)", ret);
2215                 rc = -EIO;
2216                 goto error;
2217         }
2218
2219         skb_queue_tail(&dev->resp_q, resp);
2220
2221         if (mi) {
2222                 dev->cmd_complete_mi_arg = arg;
2223                 queue_work(dev->wq, &dev->mi_work);
2224                 return -EINPROGRESS;
2225         }
2226
2227         skb = pn533_build_response(dev);
2228         if (!skb)
2229                 goto error;
2230
2231         arg->cb(arg->cb_context, skb, 0);
2232         kfree(arg);
2233         return 0;
2234
2235 error:
2236         dev_kfree_skb(resp);
2237 _error:
2238         skb_queue_purge(&dev->resp_q);
2239         arg->cb(arg->cb_context, NULL, rc);
2240         kfree(arg);
2241         return rc;
2242 }
2243
2244 static int pn533_transceive(struct nfc_dev *nfc_dev,
2245                             struct nfc_target *target, struct sk_buff *skb,
2246                             data_exchange_cb_t cb, void *cb_context)
2247 {
2248         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2249         struct pn533_data_exchange_arg *arg = NULL;
2250         int rc;
2251
2252         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2253
2254         if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2255                 /* TODO: Implement support to multi-part data exchange */
2256                 nfc_dev_err(&dev->interface->dev,
2257                             "Data length greater than the max allowed: %d",
2258                             PN533_CMD_DATAEXCH_DATA_MAXLEN);
2259                 rc = -ENOSYS;
2260                 goto error;
2261         }
2262
2263         if (!dev->tgt_active_prot) {
2264                 nfc_dev_err(&dev->interface->dev,
2265                             "Can't exchange data if there is no active target");
2266                 rc = -EINVAL;
2267                 goto error;
2268         }
2269
2270         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2271         if (!arg) {
2272                 rc = -ENOMEM;
2273                 goto error;
2274         }
2275
2276         arg->cb = cb;
2277         arg->cb_context = cb_context;
2278
2279         switch (dev->device_type) {
2280         case PN533_DEVICE_PASORI:
2281                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2282                         rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2283                                                    skb,
2284                                                    pn533_data_exchange_complete,
2285                                                    arg);
2286
2287                         break;
2288                 }
2289         default:
2290                 *skb_push(skb, sizeof(u8)) =  1; /*TG*/
2291
2292                 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2293                                            skb, pn533_data_exchange_complete,
2294                                            arg);
2295
2296                 break;
2297         }
2298
2299         if (rc < 0) /* rc from send_async */
2300                 goto error;
2301
2302         return 0;
2303
2304 error:
2305         kfree(arg);
2306         dev_kfree_skb(skb);
2307         return rc;
2308 }
2309
2310 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2311                                   struct sk_buff *resp)
2312 {
2313         u8 status;
2314
2315         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2316
2317         if (IS_ERR(resp))
2318                 return PTR_ERR(resp);
2319
2320         status = resp->data[0];
2321
2322         dev_kfree_skb(resp);
2323
2324         if (status != 0) {
2325                 nfc_tm_deactivated(dev->nfc_dev);
2326
2327                 dev->tgt_mode = 0;
2328
2329                 return 0;
2330         }
2331
2332         queue_work(dev->wq, &dev->tg_work);
2333
2334         return 0;
2335 }
2336
2337 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2338 {
2339         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2340         int rc;
2341
2342         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2343
2344         if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2345                 nfc_dev_err(&dev->interface->dev,
2346                             "Data length greater than the max allowed: %d",
2347                             PN533_CMD_DATAEXCH_DATA_MAXLEN);
2348                 return -ENOSYS;
2349         }
2350
2351         rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2352                                    pn533_tm_send_complete, NULL);
2353         if (rc < 0)
2354                 dev_kfree_skb(skb);
2355
2356         return rc;
2357 }
2358
2359 static void pn533_wq_mi_recv(struct work_struct *work)
2360 {
2361         struct pn533 *dev = container_of(work, struct pn533, mi_work);
2362
2363         struct sk_buff *skb;
2364         int rc;
2365
2366         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2367
2368         skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2369         if (!skb)
2370                 goto error;
2371
2372         switch (dev->device_type) {
2373         case PN533_DEVICE_PASORI:
2374                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2375                         rc = pn533_send_cmd_direct_async(dev,
2376                                                 PN533_CMD_IN_COMM_THRU,
2377                                                 skb,
2378                                                 pn533_data_exchange_complete,
2379                                                  dev->cmd_complete_mi_arg);
2380
2381                         break;
2382                 }
2383         default:
2384                 *skb_put(skb, sizeof(u8)) =  1; /*TG*/
2385
2386                 rc = pn533_send_cmd_direct_async(dev,
2387                                                  PN533_CMD_IN_DATA_EXCHANGE,
2388                                                  skb,
2389                                                  pn533_data_exchange_complete,
2390                                                  dev->cmd_complete_mi_arg);
2391
2392                 break;
2393         }
2394
2395         if (rc == 0) /* success */
2396                 return;
2397
2398         nfc_dev_err(&dev->interface->dev,
2399                     "Error %d when trying to perform data_exchange", rc);
2400
2401         dev_kfree_skb(skb);
2402         kfree(dev->cmd_complete_mi_arg);
2403
2404 error:
2405         pn533_send_ack(dev, GFP_KERNEL);
2406         queue_work(dev->wq, &dev->cmd_work);
2407 }
2408
2409 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2410                                                                 u8 cfgdata_len)
2411 {
2412         struct sk_buff *skb;
2413         struct sk_buff *resp;
2414
2415         int skb_len;
2416
2417         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2418
2419         skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2420
2421         skb = pn533_alloc_skb(dev, skb_len);
2422         if (!skb)
2423                 return -ENOMEM;
2424
2425         *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2426         memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
2427
2428         resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2429         if (IS_ERR(resp))
2430                 return PTR_ERR(resp);
2431
2432         dev_kfree_skb(resp);
2433         return 0;
2434 }
2435
2436 static int pn533_get_firmware_version(struct pn533 *dev,
2437                                       struct pn533_fw_version *fv)
2438 {
2439         struct sk_buff *skb;
2440         struct sk_buff *resp;
2441
2442         skb = pn533_alloc_skb(dev, 0);
2443         if (!skb)
2444                 return -ENOMEM;
2445
2446         resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2447         if (IS_ERR(resp))
2448                 return PTR_ERR(resp);
2449
2450         fv->ic = resp->data[0];
2451         fv->ver = resp->data[1];
2452         fv->rev = resp->data[2];
2453         fv->support = resp->data[3];
2454
2455         dev_kfree_skb(resp);
2456         return 0;
2457 }
2458
2459 static int pn533_pasori_fw_reset(struct pn533 *dev)
2460 {
2461         struct sk_buff *skb;
2462         struct sk_buff *resp;
2463
2464         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2465
2466         skb = pn533_alloc_skb(dev, sizeof(u8));
2467         if (!skb)
2468                 return -ENOMEM;
2469
2470         *skb_put(skb, sizeof(u8)) = 0x1;
2471
2472         resp = pn533_send_cmd_sync(dev, 0x18, skb);
2473         if (IS_ERR(resp))
2474                 return PTR_ERR(resp);
2475
2476         dev_kfree_skb(resp);
2477
2478         return 0;
2479 }
2480
2481 struct pn533_acr122_poweron_rdr_arg {
2482         int rc;
2483         struct completion done;
2484 };
2485
2486 static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2487 {
2488         struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2489
2490         nfc_dev_dbg(&urb->dev->dev, "%s", __func__);
2491
2492         print_hex_dump(KERN_ERR, "ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
2493                        urb->transfer_buffer, urb->transfer_buffer_length,
2494                        false);
2495
2496         arg->rc = urb->status;
2497         complete(&arg->done);
2498 }
2499
2500 static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2501 {
2502         /* Power on th reader (CCID cmd) */
2503         u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2504                       0, 0, 0, 0, 0, 0, 3, 0, 0};
2505         u8 buf[255];
2506         int rc;
2507         void *cntx;
2508         struct pn533_acr122_poweron_rdr_arg arg;
2509
2510         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2511
2512         init_completion(&arg.done);
2513         cntx = dev->in_urb->context;  /* backup context */
2514
2515         dev->in_urb->transfer_buffer = buf;
2516         dev->in_urb->transfer_buffer_length = 255;
2517         dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2518         dev->in_urb->context = &arg;
2519
2520         dev->out_urb->transfer_buffer = cmd;
2521         dev->out_urb->transfer_buffer_length = sizeof(cmd);
2522
2523         print_hex_dump(KERN_ERR, "ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
2524                        cmd, sizeof(cmd), false);
2525
2526         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2527         if (rc) {
2528                 nfc_dev_err(&dev->interface->dev,
2529                             "Reader power on cmd error %d", rc);
2530                 return rc;
2531         }
2532
2533         rc =  usb_submit_urb(dev->in_urb, GFP_KERNEL);
2534         if (rc) {
2535                 nfc_dev_err(&dev->interface->dev,
2536                             "Can't submit for reader power on cmd response %d",
2537                             rc);
2538                 return rc;
2539         }
2540
2541         wait_for_completion(&arg.done);
2542         dev->in_urb->context = cntx; /* restore context */
2543
2544         return arg.rc;
2545 }
2546
2547 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2548 {
2549         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2550         u8 rf_field = !!rf;
2551         int rc;
2552
2553         rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2554                                      (u8 *)&rf_field, 1);
2555         if (rc) {
2556                 nfc_dev_err(&dev->interface->dev,
2557                             "Error on setting RF field");
2558                 return rc;
2559         }
2560
2561         return rc;
2562 }
2563
2564 int pn533_dev_up(struct nfc_dev *nfc_dev)
2565 {
2566         return pn533_rf_field(nfc_dev, 1);
2567 }
2568
2569 int pn533_dev_down(struct nfc_dev *nfc_dev)
2570 {
2571         return pn533_rf_field(nfc_dev, 0);
2572 }
2573
2574 static struct nfc_ops pn533_nfc_ops = {
2575         .dev_up = pn533_dev_up,
2576         .dev_down = pn533_dev_down,
2577         .dep_link_up = pn533_dep_link_up,
2578         .dep_link_down = pn533_dep_link_down,
2579         .start_poll = pn533_start_poll,
2580         .stop_poll = pn533_stop_poll,
2581         .activate_target = pn533_activate_target,
2582         .deactivate_target = pn533_deactivate_target,
2583         .im_transceive = pn533_transceive,
2584         .tm_send = pn533_tm_send,
2585 };
2586
2587 static int pn533_setup(struct pn533 *dev)
2588 {
2589         struct pn533_config_max_retries max_retries;
2590         struct pn533_config_timing timing;
2591         u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2592         int rc;
2593
2594         switch (dev->device_type) {
2595         case PN533_DEVICE_STD:
2596                 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2597                 max_retries.mx_rty_psl = 2;
2598                 max_retries.mx_rty_passive_act =
2599                         PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2600
2601                 timing.rfu = PN533_CONFIG_TIMING_102;
2602                 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2603                 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2604
2605                 break;
2606
2607         case PN533_DEVICE_PASORI:
2608         case PN533_DEVICE_ACR122U:
2609                 max_retries.mx_rty_atr = 0x2;
2610                 max_retries.mx_rty_psl = 0x1;
2611                 max_retries.mx_rty_passive_act =
2612                         PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2613
2614                 timing.rfu = PN533_CONFIG_TIMING_102;
2615                 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2616                 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2617
2618                 break;
2619
2620         default:
2621                 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2622                             dev->device_type);
2623                 return -EINVAL;
2624         }
2625
2626         rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2627                                      (u8 *)&max_retries, sizeof(max_retries));
2628         if (rc) {
2629                 nfc_dev_err(&dev->interface->dev,
2630                             "Error on setting MAX_RETRIES config");
2631                 return rc;
2632         }
2633
2634
2635         rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2636                                      (u8 *)&timing, sizeof(timing));
2637         if (rc) {
2638                 nfc_dev_err(&dev->interface->dev,
2639                             "Error on setting RF timings");
2640                 return rc;
2641         }
2642
2643         switch (dev->device_type) {
2644         case PN533_DEVICE_STD:
2645                 break;
2646
2647         case PN533_DEVICE_PASORI:
2648                 pn533_pasori_fw_reset(dev);
2649
2650                 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2651                                              pasori_cfg, 3);
2652                 if (rc) {
2653                         nfc_dev_err(&dev->interface->dev,
2654                                     "Error while settings PASORI config");
2655                         return rc;
2656                 }
2657
2658                 pn533_pasori_fw_reset(dev);
2659
2660                 break;
2661         }
2662
2663         return 0;
2664 }
2665
2666 static int pn533_probe(struct usb_interface *interface,
2667                         const struct usb_device_id *id)
2668 {
2669         struct pn533_fw_version fw_ver;
2670         struct pn533 *dev;
2671         struct usb_host_interface *iface_desc;
2672         struct usb_endpoint_descriptor *endpoint;
2673         int in_endpoint = 0;
2674         int out_endpoint = 0;
2675         int rc = -ENOMEM;
2676         int i;
2677         u32 protocols;
2678
2679         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2680         if (!dev)
2681                 return -ENOMEM;
2682
2683         dev->udev = usb_get_dev(interface_to_usbdev(interface));
2684         dev->interface = interface;
2685         mutex_init(&dev->cmd_lock);
2686
2687         iface_desc = interface->cur_altsetting;
2688         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2689                 endpoint = &iface_desc->endpoint[i].desc;
2690
2691                 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
2692                         in_endpoint = endpoint->bEndpointAddress;
2693
2694                 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
2695                         out_endpoint = endpoint->bEndpointAddress;
2696         }
2697
2698         if (!in_endpoint || !out_endpoint) {
2699                 nfc_dev_err(&interface->dev,
2700                             "Could not find bulk-in or bulk-out endpoint");
2701                 rc = -ENODEV;
2702                 goto error;
2703         }
2704
2705         dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
2706         dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2707
2708         if (!dev->in_urb || !dev->out_urb)
2709                 goto error;
2710
2711         usb_fill_bulk_urb(dev->in_urb, dev->udev,
2712                           usb_rcvbulkpipe(dev->udev, in_endpoint),
2713                           NULL, 0, NULL, dev);
2714         usb_fill_bulk_urb(dev->out_urb, dev->udev,
2715                           usb_sndbulkpipe(dev->udev, out_endpoint),
2716                           NULL, 0, pn533_send_complete, dev);
2717
2718         INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2719         INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
2720         INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
2721         INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
2722         INIT_WORK(&dev->poll_work, pn533_wq_poll);
2723         dev->wq = alloc_ordered_workqueue("pn533", 0);
2724         if (dev->wq == NULL)
2725                 goto error;
2726
2727         init_timer(&dev->listen_timer);
2728         dev->listen_timer.data = (unsigned long) dev;
2729         dev->listen_timer.function = pn533_listen_mode_timer;
2730
2731         skb_queue_head_init(&dev->resp_q);
2732
2733         INIT_LIST_HEAD(&dev->cmd_queue);
2734
2735         usb_set_intfdata(interface, dev);
2736
2737         dev->ops = &pn533_std_frame_ops;
2738
2739         dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
2740         dev->device_type = id->driver_info;
2741         switch (dev->device_type) {
2742         case PN533_DEVICE_STD:
2743                 protocols = PN533_ALL_PROTOCOLS;
2744                 break;
2745
2746         case PN533_DEVICE_PASORI:
2747                 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2748                 break;
2749
2750         case PN533_DEVICE_ACR122U:
2751                 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2752                 dev->ops = &pn533_acr122_frame_ops;
2753                 dev->protocol_type = PN533_PROTO_REQ_RESP,
2754
2755                 rc = pn533_acr122_poweron_rdr(dev);
2756                 if (rc < 0) {
2757                         nfc_dev_err(&dev->interface->dev,
2758                                     "Couldn't poweron the reader (error %d)",
2759                                     rc);
2760                         goto destroy_wq;
2761                 }
2762                 break;
2763
2764         default:
2765                 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2766                             dev->device_type);
2767                 rc = -EINVAL;
2768                 goto destroy_wq;
2769         }
2770
2771         memset(&fw_ver, 0, sizeof(fw_ver));
2772         rc = pn533_get_firmware_version(dev, &fw_ver);
2773         if (rc < 0)
2774                 goto destroy_wq;
2775
2776         nfc_dev_info(&dev->interface->dev,
2777                      "NXP PN533 firmware ver %d.%d now attached",
2778                      fw_ver.ver, fw_ver.rev);
2779
2780
2781         dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2782                                            NFC_SE_NONE,
2783                                            dev->ops->tx_header_len +
2784                                            PN533_CMD_DATAEXCH_HEAD_LEN,
2785                                            dev->ops->tx_tail_len);
2786         if (!dev->nfc_dev)
2787                 goto destroy_wq;
2788
2789         nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2790         nfc_set_drvdata(dev->nfc_dev, dev);
2791
2792         rc = nfc_register_device(dev->nfc_dev);
2793         if (rc)
2794                 goto free_nfc_dev;
2795
2796         rc = pn533_setup(dev);
2797         if (rc)
2798                 goto unregister_nfc_dev;
2799
2800         return 0;
2801
2802 unregister_nfc_dev:
2803         nfc_unregister_device(dev->nfc_dev);
2804
2805 free_nfc_dev:
2806         nfc_free_device(dev->nfc_dev);
2807
2808 destroy_wq:
2809         destroy_workqueue(dev->wq);
2810 error:
2811         usb_free_urb(dev->in_urb);
2812         usb_free_urb(dev->out_urb);
2813         usb_put_dev(dev->udev);
2814         kfree(dev);
2815         return rc;
2816 }
2817
2818 static void pn533_disconnect(struct usb_interface *interface)
2819 {
2820         struct pn533 *dev;
2821         struct pn533_cmd *cmd, *n;
2822
2823         dev = usb_get_intfdata(interface);
2824         usb_set_intfdata(interface, NULL);
2825
2826         nfc_unregister_device(dev->nfc_dev);
2827         nfc_free_device(dev->nfc_dev);
2828
2829         usb_kill_urb(dev->in_urb);
2830         usb_kill_urb(dev->out_urb);
2831
2832         destroy_workqueue(dev->wq);
2833
2834         skb_queue_purge(&dev->resp_q);
2835
2836         del_timer(&dev->listen_timer);
2837
2838         list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2839                 list_del(&cmd->queue);
2840                 kfree(cmd);
2841         }
2842
2843         usb_free_urb(dev->in_urb);
2844         usb_free_urb(dev->out_urb);
2845         kfree(dev);
2846
2847         nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
2848 }
2849
2850 static struct usb_driver pn533_driver = {
2851         .name =         "pn533",
2852         .probe =        pn533_probe,
2853         .disconnect =   pn533_disconnect,
2854         .id_table =     pn533_table,
2855 };
2856
2857 module_usb_driver(pn533_driver);
2858
2859 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2860 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2861 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2862 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2863 MODULE_VERSION(VERSION);
2864 MODULE_LICENSE("GPL");