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, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include <linux/device.h>
  20 #include <linux/kernel.h>
  21 #include <linux/module.h>
  22 #include <linux/slab.h>
  23 #include <linux/usb.h>
  24 #include <linux/nfc.h>
  25 #include <linux/netdevice.h>
  26 #include <net/nfc/nfc.h>
  27
  28 #define VERSION "0.2"
  29
  30 #define PN533_VENDOR_ID 0x4CC
  31 #define PN533_PRODUCT_ID 0x2533
  32
  33 #define SCM_VENDOR_ID 0x4E6
  34 #define SCL3711_PRODUCT_ID 0x5591
  35
  36 #define SONY_VENDOR_ID         0x054c
  37 #define PASORI_PRODUCT_ID      0x02e1
  38
  39 #define ACS_VENDOR_ID 0x072f
  40 #define ACR122U_PRODUCT_ID 0x2200
  41
  42 #define PN533_DEVICE_STD     0x1
  43 #define PN533_DEVICE_PASORI  0x2
  44 #define PN533_DEVICE_ACR122U 0x3
  45
  46 #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
  47                              NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
  48                              NFC_PROTO_NFC_DEP_MASK |\
  49                              NFC_PROTO_ISO14443_B_MASK)
  50
  51 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
  52                                    NFC_PROTO_MIFARE_MASK | \
  53                                    NFC_PROTO_FELICA_MASK | \
  54                                    NFC_PROTO_ISO14443_MASK | \
  55                                    NFC_PROTO_NFC_DEP_MASK)
  56
  57 static const struct usb_device_id pn533_table[] = {
  58         { USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID),
  59           .driver_info = PN533_DEVICE_STD },
  60         { USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID),
  61           .driver_info = PN533_DEVICE_STD },
  62         { USB_DEVICE(SONY_VENDOR_ID, PASORI_PRODUCT_ID),
  63           .driver_info = PN533_DEVICE_PASORI },
  64         { USB_DEVICE(ACS_VENDOR_ID, ACR122U_PRODUCT_ID),
  65           .driver_info = PN533_DEVICE_ACR122U },
  66         { }
  67 };
  68 MODULE_DEVICE_TABLE(usb, pn533_table);
  69
  70 /* How much time we spend listening for initiators */
  71 #define PN533_LISTEN_TIME 2
  72 /* Delay between each poll frame (ms) */
  73 #define PN533_POLL_INTERVAL 10
  74
  75 /* Standard pn533 frame definitions (standard and extended)*/
  76 #define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
  77                                         + 2) /* data[0] TFI, data[1] CC */
  78 #define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
  79
  80 #define PN533_EXT_FRAME_HEADER_LEN (sizeof(struct pn533_ext_frame) \
  81                                         + 2) /* data[0] TFI, data[1] CC */
  82
  83 #define PN533_CMD_DATAEXCH_DATA_MAXLEN  262
  84 #define PN533_CMD_DATAFRAME_MAXLEN      240     /* max data length (send) */
  85
  86 /*
  87  * Max extended frame payload len, excluding TFI and CC
  88  * which are already in PN533_FRAME_HEADER_LEN.
  89  */
  90 #define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
  91
  92 #define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
  93                                   Postamble (1) */
  94 #define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
  95 #define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
  96 /* Half start code (3), LEN (4) should be 0xffff for extended frame */
  97 #define PN533_STD_IS_EXTENDED(hdr) ((hdr)->datalen == 0xFF \
  98                                         && (hdr)->datalen_checksum == 0xFF)
  99 #define PN533_EXT_FRAME_CHECKSUM(f) (f->data[be16_to_cpu(f->datalen)])
 100
 101 /* start of frame */
 102 #define PN533_STD_FRAME_SOF 0x00FF
 103
 104 /* standard frame identifier: in/out/error */
 105 #define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
 106 #define PN533_STD_FRAME_DIR_OUT 0xD4
 107 #define PN533_STD_FRAME_DIR_IN 0xD5
 108
 109 /* ACS ACR122 pn533 frame definitions */
 110 #define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
 111                                           + 2)
 112 #define PN533_ACR122_TX_FRAME_TAIL_LEN 0
 113 #define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
 114                                           + 2)
 115 #define PN533_ACR122_RX_FRAME_TAIL_LEN 2
 116 #define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
 117
 118 /* CCID messages types */
 119 #define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
 120 #define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
 121
 122 #define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
 123
 124 /* PN533 Commands */
 125 #define PN533_FRAME_CMD(f) (f->data[1])
 126
 127 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
 128 #define PN533_CMD_RF_CONFIGURATION 0x32
 129 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
 130 #define PN533_CMD_IN_COMM_THRU     0x42
 131 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
 132 #define PN533_CMD_IN_ATR 0x50
 133 #define PN533_CMD_IN_RELEASE 0x52
 134 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
 135
 136 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
 137 #define PN533_CMD_TG_GET_DATA 0x86
 138 #define PN533_CMD_TG_SET_DATA 0x8e
 139 #define PN533_CMD_TG_SET_META_DATA 0x94
 140 #define PN533_CMD_UNDEF 0xff
 141
 142 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
 143
 144 /* PN533 Return codes */
 145 #define PN533_CMD_RET_MASK 0x3F
 146 #define PN533_CMD_MI_MASK 0x40
 147 #define PN533_CMD_RET_SUCCESS 0x00
 148
 149 struct pn533;
 150
 151 typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
 152                                         struct sk_buff *resp);
 153
 154 /* structs for pn533 commands */
 155
 156 /* PN533_CMD_GET_FIRMWARE_VERSION */
 157 struct pn533_fw_version {
 158         u8 ic;
 159         u8 ver;
 160         u8 rev;
 161         u8 support;
 162 };
 163
 164 /* PN533_CMD_RF_CONFIGURATION */
 165 #define PN533_CFGITEM_RF_FIELD    0x01
 166 #define PN533_CFGITEM_TIMING      0x02
 167 #define PN533_CFGITEM_MAX_RETRIES 0x05
 168 #define PN533_CFGITEM_PASORI      0x82
 169
 170 #define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
 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_SYSTEM_CODE,
 261                                 .tsn = 0x03,
 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_SYSTEM_CODE,
 274                                 .tsn = 0x03,
 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         struct sk_buff_head fragment_skb;
 356
 357         struct workqueue_struct *wq;
 358         struct work_struct cmd_work;
 359         struct work_struct cmd_complete_work;
 360         struct delayed_work poll_work;
 361         struct work_struct mi_rx_work;
 362         struct work_struct mi_tx_work;
 363         struct work_struct mi_tm_rx_work;
 364         struct work_struct mi_tm_tx_work;
 365         struct work_struct tg_work;
 366         struct work_struct rf_work;
 367
 368         struct list_head cmd_queue;
 369         struct pn533_cmd *cmd;
 370         u8 cmd_pending;
 371         struct mutex cmd_lock;  /* protects cmd queue */
 372
 373         void *cmd_complete_mi_arg;
 374         void *cmd_complete_dep_arg;
 375
 376         struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
 377         u8 poll_mod_count;
 378         u8 poll_mod_curr;
 379         u8 poll_dep;
 380         u32 poll_protocols;
 381         u32 listen_protocols;
 382         struct timer_list listen_timer;
 383         int cancel_listen;
 384
 385         u8 *gb;
 386         size_t gb_len;
 387
 388         u8 tgt_available_prots;
 389         u8 tgt_active_prot;
 390         u8 tgt_mode;
 391
 392         struct pn533_frame_ops *ops;
 393 };
 394
 395 struct pn533_cmd {
 396         struct list_head queue;
 397         u8 code;
 398         int status;
 399         struct sk_buff *req;
 400         struct sk_buff *resp;
 401         int resp_len;
 402         pn533_send_async_complete_t  complete_cb;
 403         void *complete_cb_context;
 404 };
 405
 406 struct pn533_std_frame {
 407         u8 preamble;
 408         __be16 start_frame;
 409         u8 datalen;
 410         u8 datalen_checksum;
 411         u8 data[];
 412 } __packed;
 413
 414 struct pn533_ext_frame {        /* Extended Information frame */
 415         u8 preamble;
 416         __be16 start_frame;
 417         __be16 eif_flag;        /* fixed to 0xFFFF */
 418         __be16 datalen;
 419         u8 datalen_checksum;
 420         u8 data[];
 421 } __packed;
 422
 423 struct pn533_frame_ops {
 424         void (*tx_frame_init)(void *frame, u8 cmd_code);
 425         void (*tx_frame_finish)(void *frame);
 426         void (*tx_update_payload_len)(void *frame, int len);
 427         int tx_header_len;
 428         int tx_tail_len;
 429
 430         bool (*rx_is_frame_valid)(void *frame, struct pn533 *dev);
 431         int (*rx_frame_size)(void *frame);
 432         int rx_header_len;
 433         int rx_tail_len;
 434
 435         int max_payload_len;
 436         u8 (*get_cmd_code)(void *frame);
 437 };
 438
 439 struct pn533_acr122_ccid_hdr {
 440         u8 type;
 441         u32 datalen;
 442         u8 slot;
 443         u8 seq;
 444         u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
 445                          byte for reposnse msg */
 446         u8 data[]; /* payload */
 447 } __packed;
 448
 449 struct pn533_acr122_apdu_hdr {
 450         u8 class;
 451         u8 ins;
 452         u8 p1;
 453         u8 p2;
 454 } __packed;
 455
 456 struct pn533_acr122_tx_frame {
 457         struct pn533_acr122_ccid_hdr ccid;
 458         struct pn533_acr122_apdu_hdr apdu;
 459         u8 datalen;
 460         u8 data[]; /* pn533 frame: TFI ... */
 461 } __packed;
 462
 463 struct pn533_acr122_rx_frame {
 464         struct pn533_acr122_ccid_hdr ccid;
 465         u8 data[]; /* pn533 frame : TFI ... */
 466 } __packed;
 467
 468 static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
 469 {
 470         struct pn533_acr122_tx_frame *frame = _frame;
 471
 472         frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
 473         frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
 474                                                           sizeof(datalen) */
 475         frame->ccid.slot = 0;
 476         frame->ccid.seq = 0;
 477         frame->ccid.params[0] = 0;
 478         frame->ccid.params[1] = 0;
 479         frame->ccid.params[2] = 0;
 480
 481         frame->data[0] = PN533_STD_FRAME_DIR_OUT;
 482         frame->data[1] = cmd_code;
 483         frame->datalen = 2;  /* data[0] + data[1] */
 484
 485         frame->apdu.class = 0xFF;
 486         frame->apdu.ins = 0;
 487         frame->apdu.p1 = 0;
 488         frame->apdu.p2 = 0;
 489 }
 490
 491 static void pn533_acr122_tx_frame_finish(void *_frame)
 492 {
 493         struct pn533_acr122_tx_frame *frame = _frame;
 494
 495         frame->ccid.datalen += frame->datalen;
 496 }
 497
 498 static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
 499 {
 500         struct pn533_acr122_tx_frame *frame = _frame;
 501
 502         frame->datalen += len;
 503 }
 504
 505 static bool pn533_acr122_is_rx_frame_valid(void *_frame, struct pn533 *dev)
 506 {
 507         struct pn533_acr122_rx_frame *frame = _frame;
 508
 509         if (frame->ccid.type != 0x83)
 510                 return false;
 511
 512         if (!frame->ccid.datalen)
 513                 return false;
 514
 515         if (frame->data[frame->ccid.datalen - 2] == 0x63)
 516                 return false;
 517
 518         return true;
 519 }
 520
 521 static int pn533_acr122_rx_frame_size(void *frame)
 522 {
 523         struct pn533_acr122_rx_frame *f = frame;
 524
 525         /* f->ccid.datalen already includes tail length */
 526         return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
 527 }
 528
 529 static u8 pn533_acr122_get_cmd_code(void *frame)
 530 {
 531         struct pn533_acr122_rx_frame *f = frame;
 532
 533         return PN533_FRAME_CMD(f);
 534 }
 535
 536 static struct pn533_frame_ops pn533_acr122_frame_ops = {
 537         .tx_frame_init = pn533_acr122_tx_frame_init,
 538         .tx_frame_finish = pn533_acr122_tx_frame_finish,
 539         .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
 540         .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
 541         .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
 542
 543         .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
 544         .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
 545         .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
 546         .rx_frame_size = pn533_acr122_rx_frame_size,
 547
 548         .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
 549         .get_cmd_code = pn533_acr122_get_cmd_code,
 550 };
 551
 552 /* The rule: value(high byte) + value(low byte) + checksum = 0 */
 553 static inline u8 pn533_ext_checksum(u16 value)
 554 {
 555         return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
 556 }
 557
 558 /* The rule: value + checksum = 0 */
 559 static inline u8 pn533_std_checksum(u8 value)
 560 {
 561         return ~value + 1;
 562 }
 563
 564 /* The rule: sum(data elements) + checksum = 0 */
 565 static u8 pn533_std_data_checksum(u8 *data, int datalen)
 566 {
 567         u8 sum = 0;
 568         int i;
 569
 570         for (i = 0; i < datalen; i++)
 571                 sum += data[i];
 572
 573         return pn533_std_checksum(sum);
 574 }
 575
 576 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
 577 {
 578         struct pn533_std_frame *frame = _frame;
 579
 580         frame->preamble = 0;
 581         frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
 582         PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
 583         PN533_FRAME_CMD(frame) = cmd_code;
 584         frame->datalen = 2;
 585 }
 586
 587 static void pn533_std_tx_frame_finish(void *_frame)
 588 {
 589         struct pn533_std_frame *frame = _frame;
 590
 591         frame->datalen_checksum = pn533_std_checksum(frame->datalen);
 592
 593         PN533_STD_FRAME_CHECKSUM(frame) =
 594                 pn533_std_data_checksum(frame->data, frame->datalen);
 595
 596         PN533_STD_FRAME_POSTAMBLE(frame) = 0;
 597 }
 598
 599 static void pn533_std_tx_update_payload_len(void *_frame, int len)
 600 {
 601         struct pn533_std_frame *frame = _frame;
 602
 603         frame->datalen += len;
 604 }
 605
 606 static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
 607 {
 608         u8 checksum;
 609         struct pn533_std_frame *stdf = _frame;
 610
 611         if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
 612                 return false;
 613
 614         if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
 615                 /* Standard frame code */
 616                 dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
 617
 618                 checksum = pn533_std_checksum(stdf->datalen);
 619                 if (checksum != stdf->datalen_checksum)
 620                         return false;
 621
 622                 checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
 623                 if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
 624                         return false;
 625         } else {
 626                 /* Extended */
 627                 struct pn533_ext_frame *eif = _frame;
 628
 629                 dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
 630
 631                 checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
 632                 if (checksum != eif->datalen_checksum)
 633                         return false;
 634
 635                 /* check data checksum */
 636                 checksum = pn533_std_data_checksum(eif->data,
 637                                                    be16_to_cpu(eif->datalen));
 638                 if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
 639                         return false;
 640         }
 641
 642         return true;
 643 }
 644
 645 static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
 646 {
 647         if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
 648                 return false;
 649
 650         if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
 651                 return false;
 652
 653         return true;
 654 }
 655
 656 static inline int pn533_std_rx_frame_size(void *frame)
 657 {
 658         struct pn533_std_frame *f = frame;
 659
 660         /* check for Extended Information frame */
 661         if (PN533_STD_IS_EXTENDED(f)) {
 662                 struct pn533_ext_frame *eif = frame;
 663
 664                 return sizeof(struct pn533_ext_frame)
 665                         + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
 666         }
 667
 668         return sizeof(struct pn533_std_frame) + f->datalen +
 669                PN533_STD_FRAME_TAIL_LEN;
 670 }
 671
 672 static u8 pn533_std_get_cmd_code(void *frame)
 673 {
 674         struct pn533_std_frame *f = frame;
 675         struct pn533_ext_frame *eif = frame;
 676
 677         if (PN533_STD_IS_EXTENDED(f))
 678                 return PN533_FRAME_CMD(eif);
 679         else
 680                 return PN533_FRAME_CMD(f);
 681 }
 682
 683 static struct pn533_frame_ops pn533_std_frame_ops = {
 684         .tx_frame_init = pn533_std_tx_frame_init,
 685         .tx_frame_finish = pn533_std_tx_frame_finish,
 686         .tx_update_payload_len = pn533_std_tx_update_payload_len,
 687         .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
 688         .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
 689
 690         .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
 691         .rx_frame_size = pn533_std_rx_frame_size,
 692         .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
 693         .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
 694
 695         .max_payload_len =  PN533_STD_FRAME_MAX_PAYLOAD_LEN,
 696         .get_cmd_code = pn533_std_get_cmd_code,
 697 };
 698
 699 static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
 700 {
 701         return (dev->ops->get_cmd_code(frame) ==
 702                                 PN533_CMD_RESPONSE(dev->cmd->code));
 703 }
 704
 705 static void pn533_recv_response(struct urb *urb)
 706 {
 707         struct pn533 *dev = urb->context;
 708         struct pn533_cmd *cmd = dev->cmd;
 709         u8 *in_frame;
 710
 711         cmd->status = urb->status;
 712
 713         switch (urb->status) {
 714         case 0:
 715                 break; /* success */
 716         case -ECONNRESET:
 717         case -ENOENT:
 718                 dev_dbg(&dev->interface->dev,
 719                         "The urb has been canceled (status %d)\n",
 720                         urb->status);
 721                 goto sched_wq;
 722         case -ESHUTDOWN:
 723         default:
 724                 nfc_err(&dev->interface->dev,
 725                         "Urb failure (status %d)\n", urb->status);
 726                 goto sched_wq;
 727         }
 728
 729         in_frame = dev->in_urb->transfer_buffer;
 730
 731         dev_dbg(&dev->interface->dev, "Received a frame\n");
 732         print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
 733                              dev->ops->rx_frame_size(in_frame), false);
 734
 735         if (!dev->ops->rx_is_frame_valid(in_frame, dev)) {
 736                 nfc_err(&dev->interface->dev, "Received an invalid frame\n");
 737                 cmd->status = -EIO;
 738                 goto sched_wq;
 739         }
 740
 741         if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
 742                 nfc_err(&dev->interface->dev,
 743                         "It it not the response to the last command\n");
 744                 cmd->status = -EIO;
 745                 goto sched_wq;
 746         }
 747
 748 sched_wq:
 749         queue_work(dev->wq, &dev->cmd_complete_work);
 750 }
 751
 752 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
 753 {
 754         dev->in_urb->complete = pn533_recv_response;
 755
 756         return usb_submit_urb(dev->in_urb, flags);
 757 }
 758
 759 static void pn533_recv_ack(struct urb *urb)
 760 {
 761         struct pn533 *dev = urb->context;
 762         struct pn533_cmd *cmd = dev->cmd;
 763         struct pn533_std_frame *in_frame;
 764         int rc;
 765
 766         cmd->status = urb->status;
 767
 768         switch (urb->status) {
 769         case 0:
 770                 break; /* success */
 771         case -ECONNRESET:
 772         case -ENOENT:
 773                 dev_dbg(&dev->interface->dev,
 774                         "The urb has been stopped (status %d)\n",
 775                         urb->status);
 776                 goto sched_wq;
 777         case -ESHUTDOWN:
 778         default:
 779                 nfc_err(&dev->interface->dev,
 780                         "Urb failure (status %d)\n", urb->status);
 781                 goto sched_wq;
 782         }
 783
 784         in_frame = dev->in_urb->transfer_buffer;
 785
 786         if (!pn533_std_rx_frame_is_ack(in_frame)) {
 787                 nfc_err(&dev->interface->dev, "Received an invalid ack\n");
 788                 cmd->status = -EIO;
 789                 goto sched_wq;
 790         }
 791
 792         rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
 793         if (rc) {
 794                 nfc_err(&dev->interface->dev,
 795                         "usb_submit_urb failed with result %d\n", rc);
 796                 cmd->status = rc;
 797                 goto sched_wq;
 798         }
 799
 800         return;
 801
 802 sched_wq:
 803         queue_work(dev->wq, &dev->cmd_complete_work);
 804 }
 805
 806 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
 807 {
 808         dev->in_urb->complete = pn533_recv_ack;
 809
 810         return usb_submit_urb(dev->in_urb, flags);
 811 }
 812
 813 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
 814 {
 815         u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
 816         /* spec 7.1.1.3:  Preamble, SoPC (2), ACK Code (2), Postamble */
 817         int rc;
 818
 819         dev->out_urb->transfer_buffer = ack;
 820         dev->out_urb->transfer_buffer_length = sizeof(ack);
 821         rc = usb_submit_urb(dev->out_urb, flags);
 822
 823         return rc;
 824 }
 825
 826 static int __pn533_send_frame_async(struct pn533 *dev,
 827                                         struct sk_buff *out,
 828                                         struct sk_buff *in,
 829                                         int in_len)
 830 {
 831         int rc;
 832
 833         dev->out_urb->transfer_buffer = out->data;
 834         dev->out_urb->transfer_buffer_length = out->len;
 835
 836         dev->in_urb->transfer_buffer = in->data;
 837         dev->in_urb->transfer_buffer_length = in_len;
 838
 839         print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
 840                              out->data, out->len, false);
 841
 842         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
 843         if (rc)
 844                 return rc;
 845
 846         if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
 847                 /* request for response for sent packet directly */
 848                 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
 849                 if (rc)
 850                         goto error;
 851         } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
 852                 /* request for ACK if that's the case */
 853                 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
 854                 if (rc)
 855                         goto error;
 856         }
 857
 858         return 0;
 859
 860 error:
 861         usb_unlink_urb(dev->out_urb);
 862         return rc;
 863 }
 864
 865 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
 866                                   struct sk_buff *skb)
 867 {
 868         /* payload is already there, just update datalen */
 869         int payload_len = skb->len;
 870         struct pn533_frame_ops *ops = dev->ops;
 871
 872
 873         skb_push(skb, ops->tx_header_len);
 874         skb_put(skb, ops->tx_tail_len);
 875
 876         ops->tx_frame_init(skb->data, cmd_code);
 877         ops->tx_update_payload_len(skb->data, payload_len);
 878         ops->tx_frame_finish(skb->data);
 879 }
 880
 881 static int pn533_send_async_complete(struct pn533 *dev)
 882 {
 883         struct pn533_cmd *cmd = dev->cmd;
 884         int status = cmd->status;
 885
 886         struct sk_buff *req = cmd->req;
 887         struct sk_buff *resp = cmd->resp;
 888
 889         int rc;
 890
 891         dev_kfree_skb(req);
 892
 893         if (status < 0) {
 894                 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
 895                                       ERR_PTR(status));
 896                 dev_kfree_skb(resp);
 897                 goto done;
 898         }
 899
 900         skb_put(resp, dev->ops->rx_frame_size(resp->data));
 901         skb_pull(resp, dev->ops->rx_header_len);
 902         skb_trim(resp, resp->len - dev->ops->rx_tail_len);
 903
 904         rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
 905
 906 done:
 907         kfree(cmd);
 908         dev->cmd = NULL;
 909         return rc;
 910 }
 911
 912 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
 913                               struct sk_buff *req, struct sk_buff *resp,
 914                               int resp_len,
 915                               pn533_send_async_complete_t complete_cb,
 916                               void *complete_cb_context)
 917 {
 918         struct pn533_cmd *cmd;
 919         int rc = 0;
 920
 921         dev_dbg(&dev->interface->dev, "Sending command 0x%x\n", cmd_code);
 922
 923         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 924         if (!cmd)
 925                 return -ENOMEM;
 926
 927         cmd->code = cmd_code;
 928         cmd->req = req;
 929         cmd->resp = resp;
 930         cmd->resp_len = resp_len;
 931         cmd->complete_cb = complete_cb;
 932         cmd->complete_cb_context = complete_cb_context;
 933
 934         pn533_build_cmd_frame(dev, cmd_code, req);
 935
 936         mutex_lock(&dev->cmd_lock);
 937
 938         if (!dev->cmd_pending) {
 939                 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
 940                 if (rc)
 941                         goto error;
 942
 943                 dev->cmd_pending = 1;
 944                 dev->cmd = cmd;
 945                 goto unlock;
 946         }
 947
 948         dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x\n",
 949                 __func__, cmd_code);
 950
 951         INIT_LIST_HEAD(&cmd->queue);
 952         list_add_tail(&cmd->queue, &dev->cmd_queue);
 953
 954         goto unlock;
 955
 956 error:
 957         kfree(cmd);
 958 unlock:
 959         mutex_unlock(&dev->cmd_lock);
 960         return rc;
 961 }
 962
 963 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
 964                                  struct sk_buff *req,
 965                                  pn533_send_async_complete_t complete_cb,
 966                                  void *complete_cb_context)
 967 {
 968         struct sk_buff *resp;
 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 = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
 975         if (!resp)
 976                 return -ENOMEM;
 977
 978         rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
 979                                 complete_cb_context);
 980         if (rc)
 981                 dev_kfree_skb(resp);
 982
 983         return rc;
 984 }
 985
 986 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
 987                                 struct sk_buff *req,
 988                                 pn533_send_async_complete_t complete_cb,
 989                                 void *complete_cb_context)
 990 {
 991         struct sk_buff *resp;
 992         int rc;
 993         int  resp_len = dev->ops->rx_header_len +
 994                         dev->ops->max_payload_len +
 995                         dev->ops->rx_tail_len;
 996
 997         resp = alloc_skb(resp_len, GFP_KERNEL);
 998         if (!resp)
 999                 return -ENOMEM;
1000
1001         rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
1002                                 complete_cb_context);
1003         if (rc)
1004                 dev_kfree_skb(resp);
1005
1006         return rc;
1007 }
1008
1009 /*
1010  * pn533_send_cmd_direct_async
1011  *
1012  * The function sends a piority cmd directly to the chip omiting the cmd
1013  * queue. It's intended to be used by chaining mechanism of received responses
1014  * where the host has to request every single chunk of data before scheduling
1015  * next cmd from the queue.
1016  */
1017 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
1018                                        struct sk_buff *req,
1019                                        pn533_send_async_complete_t complete_cb,
1020                                        void *complete_cb_context)
1021 {
1022         struct sk_buff *resp;
1023         struct pn533_cmd *cmd;
1024         int rc;
1025         int resp_len = dev->ops->rx_header_len +
1026                        dev->ops->max_payload_len +
1027                        dev->ops->rx_tail_len;
1028
1029         resp = alloc_skb(resp_len, GFP_KERNEL);
1030         if (!resp)
1031                 return -ENOMEM;
1032
1033         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
1034         if (!cmd) {
1035                 dev_kfree_skb(resp);
1036                 return -ENOMEM;
1037         }
1038
1039         cmd->code = cmd_code;
1040         cmd->req = req;
1041         cmd->resp = resp;
1042         cmd->resp_len = resp_len;
1043         cmd->complete_cb = complete_cb;
1044         cmd->complete_cb_context = complete_cb_context;
1045
1046         pn533_build_cmd_frame(dev, cmd_code, req);
1047
1048         rc = __pn533_send_frame_async(dev, req, resp, resp_len);
1049         if (rc < 0) {
1050                 dev_kfree_skb(resp);
1051                 kfree(cmd);
1052         } else {
1053                 dev->cmd = cmd;
1054         }
1055
1056         return rc;
1057 }
1058
1059 static void pn533_wq_cmd_complete(struct work_struct *work)
1060 {
1061         struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1062         int rc;
1063
1064         rc = pn533_send_async_complete(dev);
1065         if (rc != -EINPROGRESS)
1066                 queue_work(dev->wq, &dev->cmd_work);
1067 }
1068
1069 static void pn533_wq_cmd(struct work_struct *work)
1070 {
1071         struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1072         struct pn533_cmd *cmd;
1073         int rc;
1074
1075         mutex_lock(&dev->cmd_lock);
1076
1077         if (list_empty(&dev->cmd_queue)) {
1078                 dev->cmd_pending = 0;
1079                 mutex_unlock(&dev->cmd_lock);
1080                 return;
1081         }
1082
1083         cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1084
1085         list_del(&cmd->queue);
1086
1087         mutex_unlock(&dev->cmd_lock);
1088
1089         rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
1090         if (rc < 0) {
1091                 dev_kfree_skb(cmd->req);
1092                 dev_kfree_skb(cmd->resp);
1093                 kfree(cmd);
1094                 return;
1095         }
1096
1097         dev->cmd = cmd;
1098 }
1099
1100 struct pn533_sync_cmd_response {
1101         struct sk_buff *resp;
1102         struct completion done;
1103 };
1104
1105 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1106                                     struct sk_buff *resp)
1107 {
1108         struct pn533_sync_cmd_response *arg = _arg;
1109
1110         arg->resp = resp;
1111         complete(&arg->done);
1112
1113         return 0;
1114 }
1115
1116 /*  pn533_send_cmd_sync
1117  *
1118  *  Please note the req parameter is freed inside the function to
1119  *  limit a number of return value interpretations by the caller.
1120  *
1121  *  1. negative in case of error during TX path -> req should be freed
1122  *
1123  *  2. negative in case of error during RX path -> req should not be freed
1124  *     as it's been already freed at the begining of RX path by
1125  *     async_complete_cb.
1126  *
1127  *  3. valid pointer in case of succesfult RX path
1128  *
1129  *  A caller has to check a return value with IS_ERR macro. If the test pass,
1130  *  the returned pointer is valid.
1131  *
1132  * */
1133 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1134                                                struct sk_buff *req)
1135 {
1136         int rc;
1137         struct pn533_sync_cmd_response arg;
1138
1139         init_completion(&arg.done);
1140
1141         rc = pn533_send_cmd_async(dev, cmd_code, req,
1142                                   pn533_send_sync_complete, &arg);
1143         if (rc) {
1144                 dev_kfree_skb(req);
1145                 return ERR_PTR(rc);
1146         }
1147
1148         wait_for_completion(&arg.done);
1149
1150         return arg.resp;
1151 }
1152
1153 static void pn533_send_complete(struct urb *urb)
1154 {
1155         struct pn533 *dev = urb->context;
1156
1157         switch (urb->status) {
1158         case 0:
1159                 break; /* success */
1160         case -ECONNRESET:
1161         case -ENOENT:
1162                 dev_dbg(&dev->interface->dev,
1163                         "The urb has been stopped (status %d)\n",
1164                         urb->status);
1165                 break;
1166         case -ESHUTDOWN:
1167         default:
1168                 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
1169                         urb->status);
1170         }
1171 }
1172
1173 static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1174 {
1175         /* ACR122U does not support any command which aborts last
1176          * issued command i.e. as ACK for standard PN533. Additionally,
1177          * it behaves stange, sending broken or incorrect responses,
1178          * when we cancel urb before the chip will send response.
1179          */
1180         if (dev->device_type == PN533_DEVICE_ACR122U)
1181                 return;
1182
1183         /* An ack will cancel the last issued command */
1184         pn533_send_ack(dev, flags);
1185
1186         /* cancel the urb request */
1187         usb_kill_urb(dev->in_urb);
1188 }
1189
1190 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
1191 {
1192         struct sk_buff *skb;
1193
1194         skb = alloc_skb(dev->ops->tx_header_len +
1195                         size +
1196                         dev->ops->tx_tail_len, GFP_KERNEL);
1197
1198         if (skb)
1199                 skb_reserve(skb, dev->ops->tx_header_len);
1200
1201         return skb;
1202 }
1203
1204 struct pn533_target_type_a {
1205         __be16 sens_res;
1206         u8 sel_res;
1207         u8 nfcid_len;
1208         u8 nfcid_data[];
1209 } __packed;
1210
1211
1212 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1213 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1214 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1215
1216 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1217 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1218
1219 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1220 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1221
1222 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
1223 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
1224 #define PN533_TYPE_A_SEL_PROT_DEP 2
1225 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1226
1227 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1228                                                         int target_data_len)
1229 {
1230         u8 ssd;
1231         u8 platconf;
1232
1233         if (target_data_len < sizeof(struct pn533_target_type_a))
1234                 return false;
1235
1236         /* The lenght check of nfcid[] and ats[] are not being performed because
1237            the values are not being used */
1238
1239         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1240         ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1241         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1242
1243         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1244              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1245             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1246              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1247                 return false;
1248
1249         /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1250         if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1251                 return false;
1252
1253         if (type_a->nfcid_len > NFC_NFCID1_MAXSIZE)
1254                 return false;
1255
1256         return true;
1257 }
1258
1259 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1260                                                         int tgt_data_len)
1261 {
1262         struct pn533_target_type_a *tgt_type_a;
1263
1264         tgt_type_a = (struct pn533_target_type_a *)tgt_data;
1265
1266         if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1267                 return -EPROTO;
1268
1269         switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1270         case PN533_TYPE_A_SEL_PROT_MIFARE:
1271                 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1272                 break;
1273         case PN533_TYPE_A_SEL_PROT_ISO14443:
1274                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1275                 break;
1276         case PN533_TYPE_A_SEL_PROT_DEP:
1277                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1278                 break;
1279         case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1280                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1281                                                         NFC_PROTO_NFC_DEP_MASK;
1282                 break;
1283         }
1284
1285         nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1286         nfc_tgt->sel_res = tgt_type_a->sel_res;
1287         nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1288         memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
1289
1290         return 0;
1291 }
1292
1293 struct pn533_target_felica {
1294         u8 pol_res;
1295         u8 opcode;
1296         u8 nfcid2[NFC_NFCID2_MAXSIZE];
1297         u8 pad[8];
1298         /* optional */
1299         u8 syst_code[];
1300 } __packed;
1301
1302 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1303 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1304
1305 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1306                                                         int target_data_len)
1307 {
1308         if (target_data_len < sizeof(struct pn533_target_felica))
1309                 return false;
1310
1311         if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1312                 return false;
1313
1314         return true;
1315 }
1316
1317 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1318                                                         int tgt_data_len)
1319 {
1320         struct pn533_target_felica *tgt_felica;
1321
1322         tgt_felica = (struct pn533_target_felica *)tgt_data;
1323
1324         if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1325                 return -EPROTO;
1326
1327         if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1328             (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
1329                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1330         else
1331                 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1332
1333         memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1334         nfc_tgt->sensf_res_len = 9;
1335
1336         memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
1337         nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
1338
1339         return 0;
1340 }
1341
1342 struct pn533_target_jewel {
1343         __be16 sens_res;
1344         u8 jewelid[4];
1345 } __packed;
1346
1347 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1348                                                         int target_data_len)
1349 {
1350         u8 ssd;
1351         u8 platconf;
1352
1353         if (target_data_len < sizeof(struct pn533_target_jewel))
1354                 return false;
1355
1356         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1357         ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1358         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1359
1360         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1361              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1362             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1363              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1364                 return false;
1365
1366         return true;
1367 }
1368
1369 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1370                                                         int tgt_data_len)
1371 {
1372         struct pn533_target_jewel *tgt_jewel;
1373
1374         tgt_jewel = (struct pn533_target_jewel *)tgt_data;
1375
1376         if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1377                 return -EPROTO;
1378
1379         nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1380         nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
1381         nfc_tgt->nfcid1_len = 4;
1382         memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
1383
1384         return 0;
1385 }
1386
1387 struct pn533_type_b_prot_info {
1388         u8 bitrate;
1389         u8 fsci_type;
1390         u8 fwi_adc_fo;
1391 } __packed;
1392
1393 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1394 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1395 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1396
1397 struct pn533_type_b_sens_res {
1398         u8 opcode;
1399         u8 nfcid[4];
1400         u8 appdata[4];
1401         struct pn533_type_b_prot_info prot_info;
1402 } __packed;
1403
1404 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1405
1406 struct pn533_target_type_b {
1407         struct pn533_type_b_sens_res sensb_res;
1408         u8 attrib_res_len;
1409         u8 attrib_res[];
1410 } __packed;
1411
1412 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1413                                                         int target_data_len)
1414 {
1415         if (target_data_len < sizeof(struct pn533_target_type_b))
1416                 return false;
1417
1418         if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1419                 return false;
1420
1421         if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1422                                                 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1423                 return false;
1424
1425         return true;
1426 }
1427
1428 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1429                                                         int tgt_data_len)
1430 {
1431         struct pn533_target_type_b *tgt_type_b;
1432
1433         tgt_type_b = (struct pn533_target_type_b *)tgt_data;
1434
1435         if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1436                 return -EPROTO;
1437
1438         nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1439
1440         return 0;
1441 }
1442
1443 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1444                               int tgdata_len)
1445 {
1446         struct nfc_target nfc_tgt;
1447         int rc;
1448
1449         dev_dbg(&dev->interface->dev, "%s: modulation=%d\n",
1450                 __func__, dev->poll_mod_curr);
1451
1452         if (tg != 1)
1453                 return -EPROTO;
1454
1455         memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1456
1457         switch (dev->poll_mod_curr) {
1458         case PN533_POLL_MOD_106KBPS_A:
1459                 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
1460                 break;
1461         case PN533_POLL_MOD_212KBPS_FELICA:
1462         case PN533_POLL_MOD_424KBPS_FELICA:
1463                 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
1464                 break;
1465         case PN533_POLL_MOD_106KBPS_JEWEL:
1466                 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
1467                 break;
1468         case PN533_POLL_MOD_847KBPS_B:
1469                 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
1470                 break;
1471         default:
1472                 nfc_err(&dev->interface->dev,
1473                         "Unknown current poll modulation\n");
1474                 return -EPROTO;
1475         }
1476
1477         if (rc)
1478                 return rc;
1479
1480         if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1481                 dev_dbg(&dev->interface->dev,
1482                         "The Tg found doesn't have the desired protocol\n");
1483                 return -EAGAIN;
1484         }
1485
1486         dev_dbg(&dev->interface->dev,
1487                 "Target found - supported protocols: 0x%x\n",
1488                 nfc_tgt.supported_protocols);
1489
1490         dev->tgt_available_prots = nfc_tgt.supported_protocols;
1491
1492         nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1493
1494         return 0;
1495 }
1496
1497 static inline void pn533_poll_next_mod(struct pn533 *dev)
1498 {
1499         dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1500 }
1501
1502 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1503 {
1504         dev->poll_mod_count = 0;
1505 }
1506
1507 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1508 {
1509         dev->poll_mod_active[dev->poll_mod_count] =
1510                 (struct pn533_poll_modulations *)&poll_mod[mod_index];
1511         dev->poll_mod_count++;
1512 }
1513
1514 static void pn533_poll_create_mod_list(struct pn533 *dev,
1515                                        u32 im_protocols, u32 tm_protocols)
1516 {
1517         pn533_poll_reset_mod_list(dev);
1518
1519         if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1520             (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1521             (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1522                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1523
1524         if (im_protocols & NFC_PROTO_FELICA_MASK ||
1525             im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1526                 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1527                 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1528         }
1529
1530         if (im_protocols & NFC_PROTO_JEWEL_MASK)
1531                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1532
1533         if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1534                 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1535
1536         if (tm_protocols)
1537                 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1538 }
1539
1540 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
1541 {
1542         u8 nbtg, tg, *tgdata;
1543         int rc, tgdata_len;
1544
1545         /* Toggle the DEP polling */
1546         dev->poll_dep = 1;
1547
1548         nbtg = resp->data[0];
1549         tg = resp->data[1];
1550         tgdata = &resp->data[2];
1551         tgdata_len = resp->len - 2;  /* nbtg + tg */
1552
1553         if (nbtg) {
1554                 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1555
1556                 /* We must stop the poll after a valid target found */
1557                 if (rc == 0) {
1558                         pn533_poll_reset_mod_list(dev);
1559                         return 0;
1560                 }
1561         }
1562
1563         return -EAGAIN;
1564 }
1565
1566 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1567 {
1568         struct sk_buff *skb;
1569         u8 *felica, *nfcid3, *gb;
1570
1571         u8 *gbytes = dev->gb;
1572         size_t gbytes_len = dev->gb_len;
1573
1574         u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1575                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1576                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1577                                 0xff, 0xff}; /* System code */
1578
1579         u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1580                                0x0, 0x0, 0x0,
1581                                0x40}; /* SEL_RES for DEP */
1582
1583         unsigned int skb_len = 36 + /* mode (1), mifare (6),
1584                                        felica (18), nfcid3 (10), gb_len (1) */
1585                                gbytes_len +
1586                                1;  /* len Tk*/
1587
1588         skb = pn533_alloc_skb(dev, skb_len);
1589         if (!skb)
1590                 return NULL;
1591
1592         /* DEP support only */
1593         *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
1594
1595         /* MIFARE params */
1596         memcpy(skb_put(skb, 6), mifare_params, 6);
1597
1598         /* Felica params */
1599         felica = skb_put(skb, 18);
1600         memcpy(felica, felica_params, 18);
1601         get_random_bytes(felica + 2, 6);
1602
1603         /* NFCID3 */
1604         nfcid3 = skb_put(skb, 10);
1605         memset(nfcid3, 0, 10);
1606         memcpy(nfcid3, felica, 8);
1607
1608         /* General bytes */
1609         *skb_put(skb, 1) = gbytes_len;
1610
1611         gb = skb_put(skb, gbytes_len);
1612         memcpy(gb, gbytes, gbytes_len);
1613
1614         /* Len Tk */
1615         *skb_put(skb, 1) = 0;
1616
1617         return skb;
1618 }
1619
1620 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
1621 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1622 static void pn533_wq_tm_mi_recv(struct work_struct *work);
1623 static struct sk_buff *pn533_build_response(struct pn533 *dev);
1624
1625 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1626                                       struct sk_buff *resp)
1627 {
1628         struct sk_buff *skb;
1629         u8 status, ret, mi;
1630         int rc;
1631
1632         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1633
1634         if (IS_ERR(resp)) {
1635                 skb_queue_purge(&dev->resp_q);
1636                 return PTR_ERR(resp);
1637         }
1638
1639         status = resp->data[0];
1640
1641         ret = status & PN533_CMD_RET_MASK;
1642         mi = status & PN533_CMD_MI_MASK;
1643
1644         skb_pull(resp, sizeof(status));
1645
1646         if (ret != PN533_CMD_RET_SUCCESS) {
1647                 rc = -EIO;
1648                 goto error;
1649         }
1650
1651         skb_queue_tail(&dev->resp_q, resp);
1652
1653         if (mi) {
1654                 queue_work(dev->wq, &dev->mi_tm_rx_work);
1655                 return -EINPROGRESS;
1656         }
1657
1658         skb = pn533_build_response(dev);
1659         if (!skb) {
1660                 rc = -EIO;
1661                 goto error;
1662         }
1663
1664         return nfc_tm_data_received(dev->nfc_dev, skb);
1665
1666 error:
1667         nfc_tm_deactivated(dev->nfc_dev);
1668         dev->tgt_mode = 0;
1669         skb_queue_purge(&dev->resp_q);
1670         dev_kfree_skb(resp);
1671
1672         return rc;
1673 }
1674
1675 static void pn533_wq_tm_mi_recv(struct work_struct *work)
1676 {
1677         struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work);
1678         struct sk_buff *skb;
1679         int rc;
1680
1681         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1682
1683         skb = pn533_alloc_skb(dev, 0);
1684         if (!skb)
1685                 return;
1686
1687         rc = pn533_send_cmd_direct_async(dev,
1688                                         PN533_CMD_TG_GET_DATA,
1689                                         skb,
1690                                         pn533_tm_get_data_complete,
1691                                         NULL);
1692
1693         if (rc < 0)
1694                 dev_kfree_skb(skb);
1695
1696         return;
1697 }
1698
1699 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
1700                                   struct sk_buff *resp);
1701 static void pn533_wq_tm_mi_send(struct work_struct *work)
1702 {
1703         struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work);
1704         struct sk_buff *skb;
1705         int rc;
1706
1707         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1708
1709         /* Grab the first skb in the queue */
1710         skb = skb_dequeue(&dev->fragment_skb);
1711         if (skb == NULL) {      /* No more data */
1712                 /* Reset the queue for future use */
1713                 skb_queue_head_init(&dev->fragment_skb);
1714                 goto error;
1715         }
1716
1717         /* last entry - remove MI bit */
1718         if (skb_queue_len(&dev->fragment_skb) == 0) {
1719                 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
1720                                         skb, pn533_tm_send_complete, NULL);
1721         } else
1722                 rc = pn533_send_cmd_direct_async(dev,
1723                                         PN533_CMD_TG_SET_META_DATA,
1724                                         skb, pn533_tm_send_complete, NULL);
1725
1726         if (rc == 0) /* success */
1727                 return;
1728
1729         dev_err(&dev->interface->dev,
1730                 "Error %d when trying to perform set meta data_exchange", rc);
1731
1732         dev_kfree_skb(skb);
1733
1734 error:
1735         pn533_send_ack(dev, GFP_KERNEL);
1736         queue_work(dev->wq, &dev->cmd_work);
1737 }
1738
1739 static void pn533_wq_tg_get_data(struct work_struct *work)
1740 {
1741         struct pn533 *dev = container_of(work, struct pn533, tg_work);
1742         struct sk_buff *skb;
1743         int rc;
1744
1745         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1746
1747         skb = pn533_alloc_skb(dev, 0);
1748         if (!skb)
1749                 return;
1750
1751         rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1752                                    pn533_tm_get_data_complete, NULL);
1753
1754         if (rc < 0)
1755                 dev_kfree_skb(skb);
1756
1757         return;
1758 }
1759
1760 #define ATR_REQ_GB_OFFSET 17
1761 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1762 {
1763         u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1764         size_t gb_len;
1765         int rc;
1766
1767         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1768
1769         if (resp->len < ATR_REQ_GB_OFFSET + 1)
1770                 return -EINVAL;
1771
1772         mode = resp->data[0];
1773         cmd = &resp->data[1];
1774
1775         dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1776                 mode, resp->len);
1777
1778         if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1779             PN533_INIT_TARGET_RESP_ACTIVE)
1780                 comm_mode = NFC_COMM_ACTIVE;
1781
1782         if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0)  /* Only DEP supported */
1783                 return -EOPNOTSUPP;
1784
1785         gb = cmd + ATR_REQ_GB_OFFSET;
1786         gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1787
1788         rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1789                               comm_mode, gb, gb_len);
1790         if (rc < 0) {
1791                 nfc_err(&dev->interface->dev,
1792                         "Error when signaling target activation\n");
1793                 return rc;
1794         }
1795
1796         dev->tgt_mode = 1;
1797         queue_work(dev->wq, &dev->tg_work);
1798
1799         return 0;
1800 }
1801
1802 static void pn533_listen_mode_timer(unsigned long data)
1803 {
1804         struct pn533 *dev = (struct pn533 *)data;
1805
1806         dev_dbg(&dev->interface->dev, "Listen mode timeout\n");
1807
1808         dev->cancel_listen = 1;
1809
1810         pn533_poll_next_mod(dev);
1811
1812         queue_delayed_work(dev->wq, &dev->poll_work,
1813                            msecs_to_jiffies(PN533_POLL_INTERVAL));
1814 }
1815
1816 static int pn533_rf_complete(struct pn533 *dev, void *arg,
1817                              struct sk_buff *resp)
1818 {
1819         int rc = 0;
1820
1821         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1822
1823         if (IS_ERR(resp)) {
1824                 rc = PTR_ERR(resp);
1825
1826                 nfc_err(&dev->interface->dev, "RF setting error %d\n", rc);
1827
1828                 return rc;
1829         }
1830
1831         queue_delayed_work(dev->wq, &dev->poll_work,
1832                            msecs_to_jiffies(PN533_POLL_INTERVAL));
1833
1834         dev_kfree_skb(resp);
1835         return rc;
1836 }
1837
1838 static void pn533_wq_rf(struct work_struct *work)
1839 {
1840         struct pn533 *dev = container_of(work, struct pn533, rf_work);
1841         struct sk_buff *skb;
1842         int rc;
1843
1844         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1845
1846         skb = pn533_alloc_skb(dev, 2);
1847         if (!skb)
1848                 return;
1849
1850         *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD;
1851         *skb_put(skb, 1) = PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
1852
1853         rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1854                                   pn533_rf_complete, NULL);
1855         if (rc < 0) {
1856                 dev_kfree_skb(skb);
1857                 nfc_err(&dev->interface->dev, "RF setting error %d\n", rc);
1858         }
1859
1860         return;
1861 }
1862
1863 static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
1864                                    struct sk_buff *resp)
1865 {
1866         struct pn533_cmd_jump_dep_response *rsp;
1867         struct nfc_target nfc_target;
1868         u8 target_gt_len;
1869         int rc;
1870
1871         if (IS_ERR(resp))
1872                 return PTR_ERR(resp);
1873
1874         rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1875
1876         rc = rsp->status & PN533_CMD_RET_MASK;
1877         if (rc != PN533_CMD_RET_SUCCESS) {
1878                 /* Not target found, turn radio off */
1879                 queue_work(dev->wq, &dev->rf_work);
1880
1881                 dev_kfree_skb(resp);
1882                 return 0;
1883         }
1884
1885         dev_dbg(&dev->interface->dev, "Creating new target");
1886
1887         nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1888         nfc_target.nfcid1_len = 10;
1889         memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1890         rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1891         if (rc)
1892                 goto error;
1893
1894         dev->tgt_available_prots = 0;
1895         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1896
1897         /* ATR_RES general bytes are located at offset 17 */
1898         target_gt_len = resp->len - 17;
1899         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1900                                           rsp->gt, target_gt_len);
1901         if (!rc) {
1902                 rc = nfc_dep_link_is_up(dev->nfc_dev,
1903                                         dev->nfc_dev->targets[0].idx,
1904                                         0, NFC_RF_INITIATOR);
1905
1906                 if (!rc)
1907                         pn533_poll_reset_mod_list(dev);
1908         }
1909 error:
1910         dev_kfree_skb(resp);
1911         return rc;
1912 }
1913
1914 #define PASSIVE_DATA_LEN 5
1915 static int pn533_poll_dep(struct nfc_dev *nfc_dev)
1916 {
1917         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1918         struct sk_buff *skb;
1919         int rc, skb_len;
1920         u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
1921         u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1922
1923         dev_dbg(&dev->interface->dev, "%s", __func__);
1924
1925         if (!dev->gb) {
1926                 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1927
1928                 if (!dev->gb || !dev->gb_len) {
1929                         dev->poll_dep = 0;
1930                         queue_work(dev->wq, &dev->rf_work);
1931                 }
1932         }
1933
1934         skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
1935         skb_len += PASSIVE_DATA_LEN;
1936
1937         /* NFCID3 */
1938         skb_len += NFC_NFCID3_MAXSIZE;
1939         nfcid3[0] = 0x1;
1940         nfcid3[1] = 0xfe;
1941         get_random_bytes(nfcid3 + 2, 6);
1942
1943         skb = pn533_alloc_skb(dev, skb_len);
1944         if (!skb)
1945                 return -ENOMEM;
1946
1947         *skb_put(skb, 1) = 0x01;  /* Active */
1948         *skb_put(skb, 1) = 0x02;  /* 424 kbps */
1949
1950         next = skb_put(skb, 1);  /* Next */
1951         *next = 0;
1952
1953         /* Copy passive data */
1954         memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
1955         *next |= 1;
1956
1957         /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1958         memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
1959                NFC_NFCID3_MAXSIZE);
1960         *next |= 2;
1961
1962         memcpy(skb_put(skb, dev->gb_len), dev->gb, dev->gb_len);
1963         *next |= 4; /* We have some Gi */
1964
1965         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1966                                   pn533_poll_dep_complete, NULL);
1967
1968         if (rc < 0)
1969                 dev_kfree_skb(skb);
1970
1971         return rc;
1972 }
1973
1974 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1975                                struct sk_buff *resp)
1976 {
1977         struct pn533_poll_modulations *cur_mod;
1978         int rc;
1979
1980         dev_dbg(&dev->interface->dev, "%s\n", __func__);
1981
1982         if (IS_ERR(resp)) {
1983                 rc = PTR_ERR(resp);
1984
1985                 nfc_err(&dev->interface->dev, "%s  Poll complete error %d\n",
1986                         __func__, rc);
1987
1988                 if (rc == -ENOENT) {
1989                         if (dev->poll_mod_count != 0)
1990                                 return rc;
1991                         else
1992                                 goto stop_poll;
1993                 } else if (rc < 0) {
1994                         nfc_err(&dev->interface->dev,
1995                                 "Error %d when running poll\n", rc);
1996                         goto stop_poll;
1997                 }
1998         }
1999
2000         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
2001
2002         if (cur_mod->len == 0) { /* Target mode */
2003                 del_timer(&dev->listen_timer);
2004                 rc = pn533_init_target_complete(dev, resp);
2005                 goto done;
2006         }
2007
2008         /* Initiator mode */
2009         rc = pn533_start_poll_complete(dev, resp);
2010         if (!rc)
2011                 goto done;
2012
2013         if (!dev->poll_mod_count) {
2014                 dev_dbg(&dev->interface->dev, "Polling has been stopped\n");
2015                 goto done;
2016         }
2017
2018         pn533_poll_next_mod(dev);
2019         /* Not target found, turn radio off */
2020         queue_work(dev->wq, &dev->rf_work);
2021
2022 done:
2023         dev_kfree_skb(resp);
2024         return rc;
2025
2026 stop_poll:
2027         nfc_err(&dev->interface->dev, "Polling operation has been stopped\n");
2028
2029         pn533_poll_reset_mod_list(dev);
2030         dev->poll_protocols = 0;
2031         return rc;
2032 }
2033
2034 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
2035                                         struct pn533_poll_modulations *mod)
2036 {
2037         struct sk_buff *skb;
2038
2039         skb = pn533_alloc_skb(dev, mod->len);
2040         if (!skb)
2041                 return NULL;
2042
2043         memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
2044
2045         return skb;
2046 }
2047
2048 static int pn533_send_poll_frame(struct pn533 *dev)
2049 {
2050         struct pn533_poll_modulations *mod;
2051         struct sk_buff *skb;
2052         int rc;
2053         u8 cmd_code;
2054
2055         mod = dev->poll_mod_active[dev->poll_mod_curr];
2056
2057         dev_dbg(&dev->interface->dev, "%s mod len %d\n",
2058                 __func__, mod->len);
2059
2060         if (dev->poll_dep)  {
2061                 dev->poll_dep = 0;
2062                 return pn533_poll_dep(dev->nfc_dev);
2063         }
2064
2065         if (mod->len == 0) {  /* Listen mode */
2066                 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
2067                 skb = pn533_alloc_poll_tg_frame(dev);
2068         } else {  /* Polling mode */
2069                 cmd_code =  PN533_CMD_IN_LIST_PASSIVE_TARGET;
2070                 skb = pn533_alloc_poll_in_frame(dev, mod);
2071         }
2072
2073         if (!skb) {
2074                 nfc_err(&dev->interface->dev, "Failed to allocate skb\n");
2075                 return -ENOMEM;
2076         }
2077
2078         rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
2079                                   NULL);
2080         if (rc < 0) {
2081                 dev_kfree_skb(skb);
2082                 nfc_err(&dev->interface->dev, "Polling loop error %d\n", rc);
2083         }
2084
2085         return rc;
2086 }
2087
2088 static void pn533_wq_poll(struct work_struct *work)
2089 {
2090         struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
2091         struct pn533_poll_modulations *cur_mod;
2092         int rc;
2093
2094         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
2095
2096         dev_dbg(&dev->interface->dev,
2097                 "%s cancel_listen %d modulation len %d\n",
2098                 __func__, dev->cancel_listen, cur_mod->len);
2099
2100         if (dev->cancel_listen == 1) {
2101                 dev->cancel_listen = 0;
2102                 pn533_abort_cmd(dev, GFP_ATOMIC);
2103         }
2104
2105         rc = pn533_send_poll_frame(dev);
2106         if (rc)
2107                 return;
2108
2109         if (cur_mod->len == 0 && dev->poll_mod_count > 1)
2110                 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
2111
2112         return;
2113 }
2114
2115 static int pn533_start_poll(struct nfc_dev *nfc_dev,
2116                             u32 im_protocols, u32 tm_protocols)
2117 {
2118         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2119         struct pn533_poll_modulations *cur_mod;
2120         u8 rand_mod;
2121         int rc;
2122
2123         dev_dbg(&dev->interface->dev,
2124                 "%s: im protocols 0x%x tm protocols 0x%x\n",
2125                 __func__, im_protocols, tm_protocols);
2126
2127         if (dev->tgt_active_prot) {
2128                 nfc_err(&dev->interface->dev,
2129                         "Cannot poll with a target already activated\n");
2130                 return -EBUSY;
2131         }
2132
2133         if (dev->tgt_mode) {
2134                 nfc_err(&dev->interface->dev,
2135                         "Cannot poll while already being activated\n");
2136                 return -EBUSY;
2137         }
2138
2139         if (tm_protocols) {
2140                 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
2141                 if (dev->gb == NULL)
2142                         tm_protocols = 0;
2143         }
2144
2145         pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
2146         dev->poll_protocols = im_protocols;
2147         dev->listen_protocols = tm_protocols;
2148
2149         /* Do not always start polling from the same modulation */
2150         get_random_bytes(&rand_mod, sizeof(rand_mod));
2151         rand_mod %= dev->poll_mod_count;
2152         dev->poll_mod_curr = rand_mod;
2153
2154         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
2155
2156         rc = pn533_send_poll_frame(dev);
2157
2158         /* Start listen timer */
2159         if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
2160                 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
2161
2162         return rc;
2163 }
2164
2165 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
2166 {
2167         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2168
2169         del_timer(&dev->listen_timer);
2170
2171         if (!dev->poll_mod_count) {
2172                 dev_dbg(&dev->interface->dev,
2173                         "Polling operation was not running\n");
2174                 return;
2175         }
2176
2177         pn533_abort_cmd(dev, GFP_KERNEL);
2178         flush_delayed_work(&dev->poll_work);
2179         pn533_poll_reset_mod_list(dev);
2180 }
2181
2182 static int pn533_activate_target_nfcdep(struct pn533 *dev)
2183 {
2184         struct pn533_cmd_activate_response *rsp;
2185         u16 gt_len;
2186         int rc;
2187         struct sk_buff *skb;
2188         struct sk_buff *resp;
2189
2190         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2191
2192         skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
2193         if (!skb)
2194                 return -ENOMEM;
2195
2196         *skb_put(skb, sizeof(u8)) = 1; /* TG */
2197         *skb_put(skb, sizeof(u8)) = 0; /* Next */
2198
2199         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
2200         if (IS_ERR(resp))
2201                 return PTR_ERR(resp);
2202
2203         rsp = (struct pn533_cmd_activate_response *)resp->data;
2204         rc = rsp->status & PN533_CMD_RET_MASK;
2205         if (rc != PN533_CMD_RET_SUCCESS) {
2206                 nfc_err(&dev->interface->dev,
2207                         "Target activation failed (error 0x%x)\n", rc);
2208                 dev_kfree_skb(resp);
2209                 return -EIO;
2210         }
2211
2212         /* ATR_RES general bytes are located at offset 16 */
2213         gt_len = resp->len - 16;
2214         rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
2215
2216         dev_kfree_skb(resp);
2217         return rc;
2218 }
2219
2220 static int pn533_activate_target(struct nfc_dev *nfc_dev,
2221                                  struct nfc_target *target, u32 protocol)
2222 {
2223         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2224         int rc;
2225
2226         dev_dbg(&dev->interface->dev, "%s: protocol=%u\n", __func__, protocol);
2227
2228         if (dev->poll_mod_count) {
2229                 nfc_err(&dev->interface->dev,
2230                         "Cannot activate while polling\n");
2231                 return -EBUSY;
2232         }
2233
2234         if (dev->tgt_active_prot) {
2235                 nfc_err(&dev->interface->dev,
2236                         "There is already an active target\n");
2237                 return -EBUSY;
2238         }
2239
2240         if (!dev->tgt_available_prots) {
2241                 nfc_err(&dev->interface->dev,
2242                         "There is no available target to activate\n");
2243                 return -EINVAL;
2244         }
2245
2246         if (!(dev->tgt_available_prots & (1 << protocol))) {
2247                 nfc_err(&dev->interface->dev,
2248                         "Target doesn't support requested proto %u\n",
2249                         protocol);
2250                 return -EINVAL;
2251         }
2252
2253         if (protocol == NFC_PROTO_NFC_DEP) {
2254                 rc = pn533_activate_target_nfcdep(dev);
2255                 if (rc) {
2256                         nfc_err(&dev->interface->dev,
2257                                 "Activating target with DEP failed %d\n", rc);
2258                         return rc;
2259                 }
2260         }
2261
2262         dev->tgt_active_prot = protocol;
2263         dev->tgt_available_prots = 0;
2264
2265         return 0;
2266 }
2267
2268 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
2269                                     struct nfc_target *target, u8 mode)
2270 {
2271         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2272         struct sk_buff *skb;
2273         struct sk_buff *resp;
2274         int rc;
2275
2276         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2277
2278         if (!dev->tgt_active_prot) {
2279                 nfc_err(&dev->interface->dev, "There is no active target\n");
2280                 return;
2281         }
2282
2283         dev->tgt_active_prot = 0;
2284         skb_queue_purge(&dev->resp_q);
2285
2286         skb = pn533_alloc_skb(dev, sizeof(u8));
2287         if (!skb)
2288                 return;
2289
2290         *skb_put(skb, 1) = 1; /* TG*/
2291
2292         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
2293         if (IS_ERR(resp))
2294                 return;
2295
2296         rc = resp->data[0] & PN533_CMD_RET_MASK;
2297         if (rc != PN533_CMD_RET_SUCCESS)
2298                 nfc_err(&dev->interface->dev,
2299                         "Error 0x%x when releasing the target\n", rc);
2300
2301         dev_kfree_skb(resp);
2302         return;
2303 }
2304
2305
2306 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
2307                                          struct sk_buff *resp)
2308 {
2309         struct pn533_cmd_jump_dep_response *rsp;
2310         u8 target_gt_len;
2311         int rc;
2312         u8 active = *(u8 *)arg;
2313
2314         kfree(arg);
2315
2316         if (IS_ERR(resp))
2317                 return PTR_ERR(resp);
2318
2319         if (dev->tgt_available_prots &&
2320             !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
2321                 nfc_err(&dev->interface->dev,
2322                         "The target does not support DEP\n");
2323                 rc =  -EINVAL;
2324                 goto error;
2325         }
2326
2327         rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
2328
2329         rc = rsp->status & PN533_CMD_RET_MASK;
2330         if (rc != PN533_CMD_RET_SUCCESS) {
2331                 nfc_err(&dev->interface->dev,
2332                         "Bringing DEP link up failed (error 0x%x)\n", rc);
2333                 goto error;
2334         }
2335
2336         if (!dev->tgt_available_prots) {
2337                 struct nfc_target nfc_target;
2338
2339                 dev_dbg(&dev->interface->dev, "Creating new target\n");
2340
2341                 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2342                 nfc_target.nfcid1_len = 10;
2343                 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
2344                 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2345                 if (rc)
2346                         goto error;
2347
2348                 dev->tgt_available_prots = 0;
2349         }
2350
2351         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2352
2353         /* ATR_RES general bytes are located at offset 17 */
2354         target_gt_len = resp->len - 17;
2355         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
2356                                           rsp->gt, target_gt_len);
2357         if (rc == 0)
2358                 rc = nfc_dep_link_is_up(dev->nfc_dev,
2359                                         dev->nfc_dev->targets[0].idx,
2360                                         !active, NFC_RF_INITIATOR);
2361
2362 error:
2363         dev_kfree_skb(resp);
2364         return rc;
2365 }
2366
2367 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
2368 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
2369                              u8 comm_mode, u8 *gb, size_t gb_len)
2370 {
2371         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2372         struct sk_buff *skb;
2373         int rc, skb_len;
2374         u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
2375         u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
2376
2377         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2378
2379         if (dev->poll_mod_count) {
2380                 nfc_err(&dev->interface->dev,
2381                         "Cannot bring the DEP link up while polling\n");
2382                 return -EBUSY;
2383         }
2384
2385         if (dev->tgt_active_prot) {
2386                 nfc_err(&dev->interface->dev,
2387                         "There is already an active target\n");
2388                 return -EBUSY;
2389         }
2390
2391         skb_len = 3 + gb_len; /* ActPass + BR + Next */
2392         skb_len += PASSIVE_DATA_LEN;
2393
2394         /* NFCID3 */
2395         skb_len += NFC_NFCID3_MAXSIZE;
2396         if (target && !target->nfcid2_len) {
2397                 nfcid3[0] = 0x1;
2398                 nfcid3[1] = 0xfe;
2399                 get_random_bytes(nfcid3 + 2, 6);
2400         }
2401
2402         skb = pn533_alloc_skb(dev, skb_len);
2403         if (!skb)
2404                 return -ENOMEM;
2405
2406         *skb_put(skb, 1) = !comm_mode;  /* ActPass */
2407         *skb_put(skb, 1) = 0x02;  /* 424 kbps */
2408
2409         next = skb_put(skb, 1);  /* Next */
2410         *next = 0;
2411
2412         /* Copy passive data */
2413         memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data, PASSIVE_DATA_LEN);
2414         *next |= 1;
2415
2416         /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
2417         if (target && target->nfcid2_len)
2418                 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2419                        target->nfcid2_len);
2420         else
2421                 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), nfcid3,
2422                        NFC_NFCID3_MAXSIZE);
2423         *next |= 2;
2424
2425         if (gb != NULL && gb_len > 0) {
2426                 memcpy(skb_put(skb, gb_len), gb, gb_len);
2427                 *next |= 4; /* We have some Gi */
2428         } else {
2429                 *next = 0;
2430         }
2431
2432         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2433         if (!arg) {
2434                 dev_kfree_skb(skb);
2435                 return -ENOMEM;
2436         }
2437
2438         *arg = !comm_mode;
2439
2440         pn533_rf_field(dev->nfc_dev, 0);
2441
2442         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2443                                   pn533_in_dep_link_up_complete, arg);
2444
2445         if (rc < 0) {
2446                 dev_kfree_skb(skb);
2447                 kfree(arg);
2448         }
2449
2450         return rc;
2451 }
2452
2453 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2454 {
2455         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2456
2457         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2458
2459         pn533_poll_reset_mod_list(dev);
2460
2461         if (dev->tgt_mode || dev->tgt_active_prot)
2462                 pn533_abort_cmd(dev, GFP_KERNEL);
2463
2464         dev->tgt_active_prot = 0;
2465         dev->tgt_mode = 0;
2466
2467         skb_queue_purge(&dev->resp_q);
2468
2469         return 0;
2470 }
2471
2472 struct pn533_data_exchange_arg {
2473         data_exchange_cb_t cb;
2474         void *cb_context;
2475 };
2476
2477 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2478 {
2479         struct sk_buff *skb, *tmp, *t;
2480         unsigned int skb_len = 0, tmp_len = 0;
2481
2482         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2483
2484         if (skb_queue_empty(&dev->resp_q))
2485                 return NULL;
2486
2487         if (skb_queue_len(&dev->resp_q) == 1) {
2488                 skb = skb_dequeue(&dev->resp_q);
2489                 goto out;
2490         }
2491
2492         skb_queue_walk_safe(&dev->resp_q, tmp, t)
2493                 skb_len += tmp->len;
2494
2495         dev_dbg(&dev->interface->dev, "%s total length %d\n",
2496                 __func__, skb_len);
2497
2498         skb = alloc_skb(skb_len, GFP_KERNEL);
2499         if (skb == NULL)
2500                 goto out;
2501
2502         skb_put(skb, skb_len);
2503
2504         skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2505                 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2506                 tmp_len += tmp->len;
2507         }
2508
2509 out:
2510         skb_queue_purge(&dev->resp_q);
2511
2512         return skb;
2513 }
2514
2515 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2516                                         struct sk_buff *resp)
2517 {
2518         struct pn533_data_exchange_arg *arg = _arg;
2519         struct sk_buff *skb;
2520         int rc = 0;
2521         u8 status, ret, mi;
2522
2523         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2524
2525         if (IS_ERR(resp)) {
2526                 rc = PTR_ERR(resp);
2527                 goto _error;
2528         }
2529
2530         status = resp->data[0];
2531         ret = status & PN533_CMD_RET_MASK;
2532         mi = status & PN533_CMD_MI_MASK;
2533
2534         skb_pull(resp, sizeof(status));
2535
2536         if (ret != PN533_CMD_RET_SUCCESS) {
2537                 nfc_err(&dev->interface->dev,
2538                         "Exchanging data failed (error 0x%x)\n", ret);
2539                 rc = -EIO;
2540                 goto error;
2541         }
2542
2543         skb_queue_tail(&dev->resp_q, resp);
2544
2545         if (mi) {
2546                 dev->cmd_complete_mi_arg = arg;
2547                 queue_work(dev->wq, &dev->mi_rx_work);
2548                 return -EINPROGRESS;
2549         }
2550
2551         /* Prepare for the next round */
2552         if (skb_queue_len(&dev->fragment_skb) > 0) {
2553                 dev->cmd_complete_dep_arg = arg;
2554                 queue_work(dev->wq, &dev->mi_tx_work);
2555
2556                 return -EINPROGRESS;
2557         }
2558
2559         skb = pn533_build_response(dev);
2560         if (!skb) {
2561                 rc = -ENOMEM;
2562                 goto error;
2563         }
2564
2565         arg->cb(arg->cb_context, skb, 0);
2566         kfree(arg);
2567         return 0;
2568
2569 error:
2570         dev_kfree_skb(resp);
2571 _error:
2572         skb_queue_purge(&dev->resp_q);
2573         arg->cb(arg->cb_context, NULL, rc);
2574         kfree(arg);
2575         return rc;
2576 }
2577
2578 /* Split the Tx skb into small chunks */
2579 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2580 {
2581         struct sk_buff *frag;
2582         int  frag_size;
2583
2584         do {
2585                 /* Remaining size */
2586                 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2587                         frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2588                 else
2589                         frag_size = skb->len;
2590
2591                 /* Allocate and reserve */
2592                 frag = pn533_alloc_skb(dev, frag_size);
2593                 if (!frag) {
2594                         skb_queue_purge(&dev->fragment_skb);
2595                         break;
2596                 }
2597
2598                 if (!dev->tgt_mode) {
2599                         /* Reserve the TG/MI byte */
2600                         skb_reserve(frag, 1);
2601
2602                         /* MI + TG */
2603                         if (frag_size  == PN533_CMD_DATAFRAME_MAXLEN)
2604                                 *skb_push(frag, sizeof(u8)) =
2605                                                         (PN533_CMD_MI_MASK | 1);
2606                         else
2607                                 *skb_push(frag, sizeof(u8)) =  1; /* TG */
2608                 }
2609
2610                 memcpy(skb_put(frag, frag_size), skb->data, frag_size);
2611
2612                 /* Reduce the size of incoming buffer */
2613                 skb_pull(skb, frag_size);
2614
2615                 /* Add this to skb_queue */
2616                 skb_queue_tail(&dev->fragment_skb, frag);
2617
2618         } while (skb->len > 0);
2619
2620         dev_kfree_skb(skb);
2621
2622         return skb_queue_len(&dev->fragment_skb);
2623 }
2624
2625 static int pn533_transceive(struct nfc_dev *nfc_dev,
2626                             struct nfc_target *target, struct sk_buff *skb,
2627                             data_exchange_cb_t cb, void *cb_context)
2628 {
2629         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2630         struct pn533_data_exchange_arg *arg = NULL;
2631         int rc;
2632
2633         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2634
2635         if (!dev->tgt_active_prot) {
2636                 nfc_err(&dev->interface->dev,
2637                         "Can't exchange data if there is no active target\n");
2638                 rc = -EINVAL;
2639                 goto error;
2640         }
2641
2642         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2643         if (!arg) {
2644                 rc = -ENOMEM;
2645                 goto error;
2646         }
2647
2648         arg->cb = cb;
2649         arg->cb_context = cb_context;
2650
2651         switch (dev->device_type) {
2652         case PN533_DEVICE_PASORI:
2653                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2654                         rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2655                                                    skb,
2656                                                    pn533_data_exchange_complete,
2657                                                    arg);
2658
2659                         break;
2660                 }
2661         default:
2662                 /* jumbo frame ? */
2663                 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2664                         rc = pn533_fill_fragment_skbs(dev, skb);
2665                         if (rc <= 0)
2666                                 goto error;
2667
2668                         skb = skb_dequeue(&dev->fragment_skb);
2669                         if (!skb) {
2670                                 rc = -EIO;
2671                                 goto error;
2672                         }
2673                 } else {
2674                         *skb_push(skb, sizeof(u8)) =  1; /* TG */
2675                 }
2676
2677                 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2678                                            skb, pn533_data_exchange_complete,
2679                                            arg);
2680
2681                 break;
2682         }
2683
2684         if (rc < 0) /* rc from send_async */
2685                 goto error;
2686
2687         return 0;
2688
2689 error:
2690         kfree(arg);
2691         dev_kfree_skb(skb);
2692         return rc;
2693 }
2694
2695 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2696                                   struct sk_buff *resp)
2697 {
2698         u8 status;
2699
2700         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2701
2702         if (IS_ERR(resp))
2703                 return PTR_ERR(resp);
2704
2705         status = resp->data[0];
2706
2707         /* Prepare for the next round */
2708         if (skb_queue_len(&dev->fragment_skb) > 0) {
2709                 queue_work(dev->wq, &dev->mi_tm_tx_work);
2710                 return -EINPROGRESS;
2711         }
2712         dev_kfree_skb(resp);
2713
2714         if (status != 0) {
2715                 nfc_tm_deactivated(dev->nfc_dev);
2716
2717                 dev->tgt_mode = 0;
2718
2719                 return 0;
2720         }
2721
2722         queue_work(dev->wq, &dev->tg_work);
2723
2724         return 0;
2725 }
2726
2727 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2728 {
2729         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2730         int rc;
2731
2732         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2733
2734         /* let's split in multiple chunks if size's too big */
2735         if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2736                 rc = pn533_fill_fragment_skbs(dev, skb);
2737                 if (rc <= 0)
2738                         goto error;
2739
2740                 /* get the first skb */
2741                 skb = skb_dequeue(&dev->fragment_skb);
2742                 if (!skb) {
2743                         rc = -EIO;
2744                         goto error;
2745                 }
2746
2747                 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
2748                                                 pn533_tm_send_complete, NULL);
2749         } else {
2750                 /* Send th skb */
2751                 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2752                                                 pn533_tm_send_complete, NULL);
2753         }
2754
2755 error:
2756         if (rc < 0) {
2757                 dev_kfree_skb(skb);
2758                 skb_queue_purge(&dev->fragment_skb);
2759         }
2760
2761         return rc;
2762 }
2763
2764 static void pn533_wq_mi_recv(struct work_struct *work)
2765 {
2766         struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
2767         struct sk_buff *skb;
2768         int rc;
2769
2770         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2771
2772         skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2773         if (!skb)
2774                 goto error;
2775
2776         switch (dev->device_type) {
2777         case PN533_DEVICE_PASORI:
2778                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2779                         rc = pn533_send_cmd_direct_async(dev,
2780                                                 PN533_CMD_IN_COMM_THRU,
2781                                                 skb,
2782                                                 pn533_data_exchange_complete,
2783                                                  dev->cmd_complete_mi_arg);
2784
2785                         break;
2786                 }
2787         default:
2788                 *skb_put(skb, sizeof(u8)) =  1; /*TG*/
2789
2790                 rc = pn533_send_cmd_direct_async(dev,
2791                                                  PN533_CMD_IN_DATA_EXCHANGE,
2792                                                  skb,
2793                                                  pn533_data_exchange_complete,
2794                                                  dev->cmd_complete_mi_arg);
2795
2796                 break;
2797         }
2798
2799         if (rc == 0) /* success */
2800                 return;
2801
2802         nfc_err(&dev->interface->dev,
2803                 "Error %d when trying to perform data_exchange\n", rc);
2804
2805         dev_kfree_skb(skb);
2806         kfree(dev->cmd_complete_mi_arg);
2807
2808 error:
2809         pn533_send_ack(dev, GFP_KERNEL);
2810         queue_work(dev->wq, &dev->cmd_work);
2811 }
2812
2813 static void pn533_wq_mi_send(struct work_struct *work)
2814 {
2815         struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2816         struct sk_buff *skb;
2817         int rc;
2818
2819         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2820
2821         /* Grab the first skb in the queue */
2822         skb = skb_dequeue(&dev->fragment_skb);
2823
2824         if (skb == NULL) {      /* No more data */
2825                 /* Reset the queue for future use */
2826                 skb_queue_head_init(&dev->fragment_skb);
2827                 goto error;
2828         }
2829
2830         switch (dev->device_type) {
2831         case PN533_DEVICE_PASORI:
2832                 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2833                         rc = -EIO;
2834                         break;
2835                 }
2836
2837                 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2838                                                  skb,
2839                                                  pn533_data_exchange_complete,
2840                                                  dev->cmd_complete_dep_arg);
2841
2842                 break;
2843
2844         default:
2845                 /* Still some fragments? */
2846                 rc = pn533_send_cmd_direct_async(dev,PN533_CMD_IN_DATA_EXCHANGE,
2847                                                  skb,
2848                                                  pn533_data_exchange_complete,
2849                                                  dev->cmd_complete_dep_arg);
2850
2851                 break;
2852         }
2853
2854         if (rc == 0) /* success */
2855                 return;
2856
2857         nfc_err(&dev->interface->dev,
2858                 "Error %d when trying to perform data_exchange\n", rc);
2859
2860         dev_kfree_skb(skb);
2861         kfree(dev->cmd_complete_dep_arg);
2862
2863 error:
2864         pn533_send_ack(dev, GFP_KERNEL);
2865         queue_work(dev->wq, &dev->cmd_work);
2866 }
2867
2868 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2869                                                                 u8 cfgdata_len)
2870 {
2871         struct sk_buff *skb;
2872         struct sk_buff *resp;
2873         int skb_len;
2874
2875         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2876
2877         skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2878
2879         skb = pn533_alloc_skb(dev, skb_len);
2880         if (!skb)
2881                 return -ENOMEM;
2882
2883         *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2884         memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
2885
2886         resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2887         if (IS_ERR(resp))
2888                 return PTR_ERR(resp);
2889
2890         dev_kfree_skb(resp);
2891         return 0;
2892 }
2893
2894 static int pn533_get_firmware_version(struct pn533 *dev,
2895                                       struct pn533_fw_version *fv)
2896 {
2897         struct sk_buff *skb;
2898         struct sk_buff *resp;
2899
2900         skb = pn533_alloc_skb(dev, 0);
2901         if (!skb)
2902                 return -ENOMEM;
2903
2904         resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2905         if (IS_ERR(resp))
2906                 return PTR_ERR(resp);
2907
2908         fv->ic = resp->data[0];
2909         fv->ver = resp->data[1];
2910         fv->rev = resp->data[2];
2911         fv->support = resp->data[3];
2912
2913         dev_kfree_skb(resp);
2914         return 0;
2915 }
2916
2917 static int pn533_pasori_fw_reset(struct pn533 *dev)
2918 {
2919         struct sk_buff *skb;
2920         struct sk_buff *resp;
2921
2922         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2923
2924         skb = pn533_alloc_skb(dev, sizeof(u8));
2925         if (!skb)
2926                 return -ENOMEM;
2927
2928         *skb_put(skb, sizeof(u8)) = 0x1;
2929
2930         resp = pn533_send_cmd_sync(dev, 0x18, skb);
2931         if (IS_ERR(resp))
2932                 return PTR_ERR(resp);
2933
2934         dev_kfree_skb(resp);
2935
2936         return 0;
2937 }
2938
2939 struct pn533_acr122_poweron_rdr_arg {
2940         int rc;
2941         struct completion done;
2942 };
2943
2944 static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2945 {
2946         struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2947
2948         dev_dbg(&urb->dev->dev, "%s\n", __func__);
2949
2950         print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
2951                        urb->transfer_buffer, urb->transfer_buffer_length,
2952                        false);
2953
2954         arg->rc = urb->status;
2955         complete(&arg->done);
2956 }
2957
2958 static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2959 {
2960         /* Power on th reader (CCID cmd) */
2961         u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2962                       0, 0, 0, 0, 0, 0, 3, 0, 0};
2963         u8 buf[255];
2964         int rc;
2965         void *cntx;
2966         struct pn533_acr122_poweron_rdr_arg arg;
2967
2968         dev_dbg(&dev->interface->dev, "%s\n", __func__);
2969
2970         init_completion(&arg.done);
2971         cntx = dev->in_urb->context;  /* backup context */
2972
2973         dev->in_urb->transfer_buffer = buf;
2974         dev->in_urb->transfer_buffer_length = 255;
2975         dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2976         dev->in_urb->context = &arg;
2977
2978         dev->out_urb->transfer_buffer = cmd;
2979         dev->out_urb->transfer_buffer_length = sizeof(cmd);
2980
2981         print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
2982                        cmd, sizeof(cmd), false);
2983
2984         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2985         if (rc) {
2986                 nfc_err(&dev->interface->dev,
2987                         "Reader power on cmd error %d\n", rc);
2988                 return rc;
2989         }
2990
2991         rc =  usb_submit_urb(dev->in_urb, GFP_KERNEL);
2992         if (rc) {
2993                 nfc_err(&dev->interface->dev,
2994                         "Can't submit reader poweron cmd response %d\n", rc);
2995                 return rc;
2996         }
2997
2998         wait_for_completion(&arg.done);
2999         dev->in_urb->context = cntx; /* restore context */
3000
3001         return arg.rc;
3002 }
3003
3004 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
3005 {
3006         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
3007         u8 rf_field = !!rf;
3008         int rc;
3009
3010         rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
3011
3012         rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
3013                                      (u8 *)&rf_field, 1);
3014         if (rc) {
3015                 nfc_err(&dev->interface->dev, "Error on setting RF field\n");
3016                 return rc;
3017         }
3018
3019         return rc;
3020 }
3021
3022 static int pn533_dev_up(struct nfc_dev *nfc_dev)
3023 {
3024         return pn533_rf_field(nfc_dev, 1);
3025 }
3026
3027 static int pn533_dev_down(struct nfc_dev *nfc_dev)
3028 {
3029         return pn533_rf_field(nfc_dev, 0);
3030 }
3031
3032 static struct nfc_ops pn533_nfc_ops = {
3033         .dev_up = pn533_dev_up,
3034         .dev_down = pn533_dev_down,
3035         .dep_link_up = pn533_dep_link_up,
3036         .dep_link_down = pn533_dep_link_down,
3037         .start_poll = pn533_start_poll,
3038         .stop_poll = pn533_stop_poll,
3039         .activate_target = pn533_activate_target,
3040         .deactivate_target = pn533_deactivate_target,
3041         .im_transceive = pn533_transceive,
3042         .tm_send = pn533_tm_send,
3043 };
3044
3045 static int pn533_setup(struct pn533 *dev)
3046 {
3047         struct pn533_config_max_retries max_retries;
3048         struct pn533_config_timing timing;
3049         u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
3050         int rc;
3051
3052         switch (dev->device_type) {
3053         case PN533_DEVICE_STD:
3054         case PN533_DEVICE_PASORI:
3055         case PN533_DEVICE_ACR122U:
3056                 max_retries.mx_rty_atr = 0x2;
3057                 max_retries.mx_rty_psl = 0x1;
3058                 max_retries.mx_rty_passive_act =
3059                         PN533_CONFIG_MAX_RETRIES_NO_RETRY;
3060
3061                 timing.rfu = PN533_CONFIG_TIMING_102;
3062                 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
3063                 timing.dep_timeout = PN533_CONFIG_TIMING_204;
3064
3065                 break;
3066
3067         default:
3068                 nfc_err(&dev->interface->dev, "Unknown device type %d\n",
3069                         dev->device_type);
3070                 return -EINVAL;
3071         }
3072
3073         rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
3074                                      (u8 *)&max_retries, sizeof(max_retries));
3075         if (rc) {
3076                 nfc_err(&dev->interface->dev,
3077                         "Error on setting MAX_RETRIES config\n");
3078                 return rc;
3079         }
3080
3081
3082         rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
3083                                      (u8 *)&timing, sizeof(timing));
3084         if (rc) {
3085                 nfc_err(&dev->interface->dev, "Error on setting RF timings\n");
3086                 return rc;
3087         }
3088
3089         switch (dev->device_type) {
3090         case PN533_DEVICE_STD:
3091                 break;
3092
3093         case PN533_DEVICE_PASORI:
3094                 pn533_pasori_fw_reset(dev);
3095
3096                 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
3097                                              pasori_cfg, 3);
3098                 if (rc) {
3099                         nfc_err(&dev->interface->dev,
3100                                 "Error while settings PASORI config\n");
3101                         return rc;
3102                 }
3103
3104                 pn533_pasori_fw_reset(dev);
3105
3106                 break;
3107         }
3108
3109         return 0;
3110 }
3111
3112 static int pn533_probe(struct usb_interface *interface,
3113                         const struct usb_device_id *id)
3114 {
3115         struct pn533_fw_version fw_ver;
3116         struct pn533 *dev;
3117         struct usb_host_interface *iface_desc;
3118         struct usb_endpoint_descriptor *endpoint;
3119         int in_endpoint = 0;
3120         int out_endpoint = 0;
3121         int rc = -ENOMEM;
3122         int i;
3123         u32 protocols;
3124
3125         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
3126         if (!dev)
3127                 return -ENOMEM;
3128
3129         dev->udev = usb_get_dev(interface_to_usbdev(interface));
3130         dev->interface = interface;
3131         mutex_init(&dev->cmd_lock);
3132
3133         iface_desc = interface->cur_altsetting;
3134         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
3135                 endpoint = &iface_desc->endpoint[i].desc;
3136
3137                 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
3138                         in_endpoint = endpoint->bEndpointAddress;
3139
3140                 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
3141                         out_endpoint = endpoint->bEndpointAddress;
3142         }
3143
3144         if (!in_endpoint || !out_endpoint) {
3145                 nfc_err(&interface->dev,
3146                         "Could not find bulk-in or bulk-out endpoint\n");
3147                 rc = -ENODEV;
3148                 goto error;
3149         }
3150
3151         dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
3152         dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
3153
3154         if (!dev->in_urb || !dev->out_urb)
3155                 goto error;
3156
3157         usb_fill_bulk_urb(dev->in_urb, dev->udev,
3158                           usb_rcvbulkpipe(dev->udev, in_endpoint),
3159                           NULL, 0, NULL, dev);
3160         usb_fill_bulk_urb(dev->out_urb, dev->udev,
3161                           usb_sndbulkpipe(dev->udev, out_endpoint),
3162                           NULL, 0, pn533_send_complete, dev);
3163
3164         INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
3165         INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
3166         INIT_WORK(&dev->mi_rx_work, pn533_wq_mi_recv);
3167         INIT_WORK(&dev->mi_tx_work, pn533_wq_mi_send);
3168         INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
3169         INIT_WORK(&dev->mi_tm_rx_work, pn533_wq_tm_mi_recv);
3170         INIT_WORK(&dev->mi_tm_tx_work, pn533_wq_tm_mi_send);
3171         INIT_DELAYED_WORK(&dev->poll_work, pn533_wq_poll);
3172         INIT_WORK(&dev->rf_work, pn533_wq_rf);
3173         dev->wq = alloc_ordered_workqueue("pn533", 0);
3174         if (dev->wq == NULL)
3175                 goto error;
3176
3177         init_timer(&dev->listen_timer);
3178         dev->listen_timer.data = (unsigned long) dev;
3179         dev->listen_timer.function = pn533_listen_mode_timer;
3180
3181         skb_queue_head_init(&dev->resp_q);
3182         skb_queue_head_init(&dev->fragment_skb);
3183
3184         INIT_LIST_HEAD(&dev->cmd_queue);
3185
3186         usb_set_intfdata(interface, dev);
3187
3188         dev->ops = &pn533_std_frame_ops;
3189
3190         dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
3191         dev->device_type = id->driver_info;
3192         switch (dev->device_type) {
3193         case PN533_DEVICE_STD:
3194                 protocols = PN533_ALL_PROTOCOLS;
3195                 break;
3196
3197         case PN533_DEVICE_PASORI:
3198                 protocols = PN533_NO_TYPE_B_PROTOCOLS;
3199                 break;
3200
3201         case PN533_DEVICE_ACR122U:
3202                 protocols = PN533_NO_TYPE_B_PROTOCOLS;
3203                 dev->ops = &pn533_acr122_frame_ops;
3204                 dev->protocol_type = PN533_PROTO_REQ_RESP,
3205
3206                 rc = pn533_acr122_poweron_rdr(dev);
3207                 if (rc < 0) {
3208                         nfc_err(&dev->interface->dev,
3209                                 "Couldn't poweron the reader (error %d)\n", rc);
3210                         goto destroy_wq;
3211                 }
3212                 break;
3213
3214         default:
3215                 nfc_err(&dev->interface->dev, "Unknown device type %d\n",
3216                         dev->device_type);
3217                 rc = -EINVAL;
3218                 goto destroy_wq;
3219         }
3220
3221         memset(&fw_ver, 0, sizeof(fw_ver));
3222         rc = pn533_get_firmware_version(dev, &fw_ver);
3223         if (rc < 0)
3224                 goto destroy_wq;
3225
3226         nfc_info(&dev->interface->dev,
3227                  "NXP PN5%02X firmware ver %d.%d now attached\n",
3228                  fw_ver.ic, fw_ver.ver, fw_ver.rev);
3229
3230
3231         dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
3232                                            dev->ops->tx_header_len +
3233                                            PN533_CMD_DATAEXCH_HEAD_LEN,
3234                                            dev->ops->tx_tail_len);
3235         if (!dev->nfc_dev) {
3236                 rc = -ENOMEM;
3237                 goto destroy_wq;
3238         }
3239
3240         nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
3241         nfc_set_drvdata(dev->nfc_dev, dev);
3242
3243         rc = nfc_register_device(dev->nfc_dev);
3244         if (rc)
3245                 goto free_nfc_dev;
3246
3247         rc = pn533_setup(dev);
3248         if (rc)
3249                 goto unregister_nfc_dev;
3250
3251         return 0;
3252
3253 unregister_nfc_dev:
3254         nfc_unregister_device(dev->nfc_dev);
3255
3256 free_nfc_dev:
3257         nfc_free_device(dev->nfc_dev);
3258
3259 destroy_wq:
3260         destroy_workqueue(dev->wq);
3261 error:
3262         usb_free_urb(dev->in_urb);
3263         usb_free_urb(dev->out_urb);
3264         usb_put_dev(dev->udev);
3265         kfree(dev);
3266         return rc;
3267 }
3268
3269 static void pn533_disconnect(struct usb_interface *interface)
3270 {
3271         struct pn533 *dev;
3272         struct pn533_cmd *cmd, *n;
3273
3274         dev = usb_get_intfdata(interface);
3275         usb_set_intfdata(interface, NULL);
3276
3277         nfc_unregister_device(dev->nfc_dev);
3278         nfc_free_device(dev->nfc_dev);
3279
3280         usb_kill_urb(dev->in_urb);
3281         usb_kill_urb(dev->out_urb);
3282
3283         flush_delayed_work(&dev->poll_work);
3284         destroy_workqueue(dev->wq);
3285
3286         skb_queue_purge(&dev->resp_q);
3287
3288         del_timer(&dev->listen_timer);
3289
3290         list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
3291                 list_del(&cmd->queue);
3292                 kfree(cmd);
3293         }
3294
3295         usb_free_urb(dev->in_urb);
3296         usb_free_urb(dev->out_urb);
3297         kfree(dev);
3298
3299         nfc_info(&interface->dev, "NXP PN533 NFC device disconnected\n");
3300 }
3301
3302 static struct usb_driver pn533_driver = {
3303         .name =         "pn533",
3304         .probe =        pn533_probe,
3305         .disconnect =   pn533_disconnect,
3306         .id_table =     pn533_table,
3307 };
3308
3309 module_usb_driver(pn533_driver);
3310
3311 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
3312 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
3313 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
3314 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
3315 MODULE_VERSION(VERSION);
3316 MODULE_LICENSE("GPL");