drivers/nfc/pn533.c

   1 /*
   2  * Copyright (C) 2011 Instituto Nokia de Tecnologia
   3  * Copyright (C) 2012-2013 Tieto Poland
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the
  17  * Free Software Foundation, Inc.,
  18  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 #include <linux/device.h>
  22 #include <linux/kernel.h>
  23 #include <linux/module.h>
  24 #include <linux/slab.h>
  25 #include <linux/usb.h>
  26 #include <linux/nfc.h>
  27 #include <linux/netdevice.h>
  28 #include <net/nfc/nfc.h>
  29
  30 #define VERSION "0.2"
  31
  32 #define PN533_VENDOR_ID 0x4CC
  33 #define PN533_PRODUCT_ID 0x2533
  34
  35 #define SCM_VENDOR_ID 0x4E6
  36 #define SCL3711_PRODUCT_ID 0x5591
  37
  38 #define SONY_VENDOR_ID         0x054c
  39 #define PASORI_PRODUCT_ID      0x02e1
  40
  41 #define ACS_VENDOR_ID 0x072f
  42 #define ACR122U_PRODUCT_ID 0x2200
  43
  44 #define PN533_DEVICE_STD     0x1
  45 #define PN533_DEVICE_PASORI  0x2
  46 #define PN533_DEVICE_ACR122U 0x3
  47
  48 #define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
  49                              NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
  50                              NFC_PROTO_NFC_DEP_MASK |\
  51                              NFC_PROTO_ISO14443_B_MASK)
  52
  53 #define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
  54                                    NFC_PROTO_MIFARE_MASK | \
  55                                    NFC_PROTO_FELICA_MASK | \
  56                                    NFC_PROTO_ISO14443_MASK | \
  57                                    NFC_PROTO_NFC_DEP_MASK)
  58
  59 static const struct usb_device_id pn533_table[] = {
  60         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  61           .idVendor             = PN533_VENDOR_ID,
  62           .idProduct            = PN533_PRODUCT_ID,
  63           .driver_info          = PN533_DEVICE_STD,
  64         },
  65         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  66           .idVendor             = SCM_VENDOR_ID,
  67           .idProduct            = SCL3711_PRODUCT_ID,
  68           .driver_info          = PN533_DEVICE_STD,
  69         },
  70         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  71           .idVendor             = SONY_VENDOR_ID,
  72           .idProduct            = PASORI_PRODUCT_ID,
  73           .driver_info          = PN533_DEVICE_PASORI,
  74         },
  75         { .match_flags          = USB_DEVICE_ID_MATCH_DEVICE,
  76           .idVendor             = ACS_VENDOR_ID,
  77           .idProduct            = ACR122U_PRODUCT_ID,
  78           .driver_info          = PN533_DEVICE_ACR122U,
  79         },
  80         { }
  81 };
  82 MODULE_DEVICE_TABLE(usb, pn533_table);
  83
  84 /* How much time we spend listening for initiators */
  85 #define PN533_LISTEN_TIME 2
  86
  87 /* Standard pn533 frame definitions */
  88 #define PN533_STD_FRAME_HEADER_LEN (sizeof(struct pn533_std_frame) \
  89                                         + 2) /* data[0] TFI, data[1] CC */
  90 #define PN533_STD_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
  91
  92 /*
  93  * Max extended frame payload len, excluding TFI and CC
  94  * which are already in PN533_FRAME_HEADER_LEN.
  95  */
  96 #define PN533_STD_FRAME_MAX_PAYLOAD_LEN 263
  97
  98 #define PN533_STD_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
  99                                   Postamble (1) */
 100 #define PN533_STD_FRAME_CHECKSUM(f) (f->data[f->datalen])
 101 #define PN533_STD_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
 102
 103 /* start of frame */
 104 #define PN533_STD_FRAME_SOF 0x00FF
 105
 106 /* standard frame identifier: in/out/error */
 107 #define PN533_STD_FRAME_IDENTIFIER(f) (f->data[0]) /* TFI */
 108 #define PN533_STD_FRAME_DIR_OUT 0xD4
 109 #define PN533_STD_FRAME_DIR_IN 0xD5
 110
 111 /* ACS ACR122 pn533 frame definitions */
 112 #define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
 113                                           + 2)
 114 #define PN533_ACR122_TX_FRAME_TAIL_LEN 0
 115 #define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
 116                                           + 2)
 117 #define PN533_ACR122_RX_FRAME_TAIL_LEN 2
 118 #define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
 119
 120 /* CCID messages types */
 121 #define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
 122 #define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
 123
 124 #define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
 125
 126 /* PN533 Commands */
 127 #define PN533_STD_FRAME_CMD(f) (f->data[1])
 128
 129 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
 130 #define PN533_CMD_RF_CONFIGURATION 0x32
 131 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
 132 #define PN533_CMD_IN_COMM_THRU     0x42
 133 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
 134 #define PN533_CMD_IN_ATR 0x50
 135 #define PN533_CMD_IN_RELEASE 0x52
 136 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
 137
 138 #define PN533_CMD_TG_INIT_AS_TARGET 0x8c
 139 #define PN533_CMD_TG_GET_DATA 0x86
 140 #define PN533_CMD_TG_SET_DATA 0x8e
 141 #define PN533_CMD_UNDEF 0xff
 142
 143 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
 144
 145 /* PN533 Return codes */
 146 #define PN533_CMD_RET_MASK 0x3F
 147 #define PN533_CMD_MI_MASK 0x40
 148 #define PN533_CMD_RET_SUCCESS 0x00
 149
 150 struct pn533;
 151
 152 typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
 153                                         struct sk_buff *resp);
 154
 155 /* structs for pn533 commands */
 156
 157 /* PN533_CMD_GET_FIRMWARE_VERSION */
 158 struct pn533_fw_version {
 159         u8 ic;
 160         u8 ver;
 161         u8 rev;
 162         u8 support;
 163 };
 164
 165 /* PN533_CMD_RF_CONFIGURATION */
 166 #define PN533_CFGITEM_RF_FIELD    0x01
 167 #define PN533_CFGITEM_TIMING      0x02
 168 #define PN533_CFGITEM_MAX_RETRIES 0x05
 169 #define PN533_CFGITEM_PASORI      0x82
 170
 171 #define PN533_CFGITEM_RF_FIELD_ON  0x1
 172 #define PN533_CFGITEM_RF_FIELD_OFF 0x0
 173
 174 #define PN533_CONFIG_TIMING_102 0xb
 175 #define PN533_CONFIG_TIMING_204 0xc
 176 #define PN533_CONFIG_TIMING_409 0xd
 177 #define PN533_CONFIG_TIMING_819 0xe
 178
 179 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
 180 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
 181
 182 struct pn533_config_max_retries {
 183         u8 mx_rty_atr;
 184         u8 mx_rty_psl;
 185         u8 mx_rty_passive_act;
 186 } __packed;
 187
 188 struct pn533_config_timing {
 189         u8 rfu;
 190         u8 atr_res_timeout;
 191         u8 dep_timeout;
 192 } __packed;
 193
 194 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
 195
 196 /* felica commands opcode */
 197 #define PN533_FELICA_OPC_SENSF_REQ 0
 198 #define PN533_FELICA_OPC_SENSF_RES 1
 199 /* felica SENSF_REQ parameters */
 200 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
 201 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
 202 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
 203 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
 204
 205 /* type B initiator_data values */
 206 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
 207 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
 208 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
 209
 210 union pn533_cmd_poll_initdata {
 211         struct {
 212                 u8 afi;
 213                 u8 polling_method;
 214         } __packed type_b;
 215         struct {
 216                 u8 opcode;
 217                 __be16 sc;
 218                 u8 rc;
 219                 u8 tsn;
 220         } __packed felica;
 221 };
 222
 223 /* Poll modulations */
 224 enum {
 225         PN533_POLL_MOD_106KBPS_A,
 226         PN533_POLL_MOD_212KBPS_FELICA,
 227         PN533_POLL_MOD_424KBPS_FELICA,
 228         PN533_POLL_MOD_106KBPS_JEWEL,
 229         PN533_POLL_MOD_847KBPS_B,
 230         PN533_LISTEN_MOD,
 231
 232         __PN533_POLL_MOD_AFTER_LAST,
 233 };
 234 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
 235
 236 struct pn533_poll_modulations {
 237         struct {
 238                 u8 maxtg;
 239                 u8 brty;
 240                 union pn533_cmd_poll_initdata initiator_data;
 241         } __packed data;
 242         u8 len;
 243 };
 244
 245 static const struct pn533_poll_modulations poll_mod[] = {
 246         [PN533_POLL_MOD_106KBPS_A] = {
 247                 .data = {
 248                         .maxtg = 1,
 249                         .brty = 0,
 250                 },
 251                 .len = 2,
 252         },
 253         [PN533_POLL_MOD_212KBPS_FELICA] = {
 254                 .data = {
 255                         .maxtg = 1,
 256                         .brty = 1,
 257                         .initiator_data.felica = {
 258                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 259                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 260                                 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
 261                                 .tsn = 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_NO_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
 356         struct workqueue_struct *wq;
 357         struct work_struct cmd_work;
 358         struct work_struct cmd_complete_work;
 359         struct work_struct poll_work;
 360         struct work_struct mi_work;
 361         struct work_struct tg_work;
 362
 363         struct list_head cmd_queue;
 364         struct pn533_cmd *cmd;
 365         u8 cmd_pending;
 366         struct mutex cmd_lock;  /* protects cmd queue */
 367
 368         void *cmd_complete_mi_arg;
 369
 370         struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
 371         u8 poll_mod_count;
 372         u8 poll_mod_curr;
 373         u32 poll_protocols;
 374         u32 listen_protocols;
 375         struct timer_list listen_timer;
 376         int cancel_listen;
 377
 378         u8 *gb;
 379         size_t gb_len;
 380
 381         u8 tgt_available_prots;
 382         u8 tgt_active_prot;
 383         u8 tgt_mode;
 384
 385         struct pn533_frame_ops *ops;
 386 };
 387
 388 struct pn533_cmd {
 389         struct list_head queue;
 390         u8 code;
 391         int status;
 392         struct sk_buff *req;
 393         struct sk_buff *resp;
 394         int resp_len;
 395         pn533_send_async_complete_t  complete_cb;
 396         void *complete_cb_context;
 397 };
 398
 399 struct pn533_std_frame {
 400         u8 preamble;
 401         __be16 start_frame;
 402         u8 datalen;
 403         u8 datalen_checksum;
 404         u8 data[];
 405 } __packed;
 406
 407 struct pn533_frame_ops {
 408         void (*tx_frame_init)(void *frame, u8 cmd_code);
 409         void (*tx_frame_finish)(void *frame);
 410         void (*tx_update_payload_len)(void *frame, int len);
 411         int tx_header_len;
 412         int tx_tail_len;
 413
 414         bool (*rx_is_frame_valid)(void *frame);
 415         int (*rx_frame_size)(void *frame);
 416         int rx_header_len;
 417         int rx_tail_len;
 418
 419         int max_payload_len;
 420         u8 (*get_cmd_code)(void *frame);
 421 };
 422
 423 struct pn533_acr122_ccid_hdr {
 424         u8 type;
 425         u32 datalen;
 426         u8 slot;
 427         u8 seq;
 428         u8 params[3]; /* 3 msg specific bytes or status, error and 1 specific
 429                          byte for reposnse msg */
 430         u8 data[]; /* payload */
 431 } __packed;
 432
 433 struct pn533_acr122_apdu_hdr {
 434         u8 class;
 435         u8 ins;
 436         u8 p1;
 437         u8 p2;
 438 } __packed;
 439
 440 struct pn533_acr122_tx_frame {
 441         struct pn533_acr122_ccid_hdr ccid;
 442         struct pn533_acr122_apdu_hdr apdu;
 443         u8 datalen;
 444         u8 data[]; /* pn533 frame: TFI ... */
 445 } __packed;
 446
 447 struct pn533_acr122_rx_frame {
 448         struct pn533_acr122_ccid_hdr ccid;
 449         u8 data[]; /* pn533 frame : TFI ... */
 450 } __packed;
 451
 452 static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
 453 {
 454         struct pn533_acr122_tx_frame *frame = _frame;
 455
 456         frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
 457         frame->ccid.datalen = sizeof(frame->apdu) + 1; /* sizeof(apdu_hdr) +
 458                                                           sizeof(datalen) */
 459         frame->ccid.slot = 0;
 460         frame->ccid.seq = 0;
 461         frame->ccid.params[0] = 0;
 462         frame->ccid.params[1] = 0;
 463         frame->ccid.params[2] = 0;
 464
 465         frame->data[0] = PN533_STD_FRAME_DIR_OUT;
 466         frame->data[1] = cmd_code;
 467         frame->datalen = 2;  /* data[0] + data[1] */
 468
 469         frame->apdu.class = 0xFF;
 470         frame->apdu.ins = 0;
 471         frame->apdu.p1 = 0;
 472         frame->apdu.p2 = 0;
 473 }
 474
 475 static void pn533_acr122_tx_frame_finish(void *_frame)
 476 {
 477         struct pn533_acr122_tx_frame *frame = _frame;
 478
 479         frame->ccid.datalen += frame->datalen;
 480 }
 481
 482 static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
 483 {
 484         struct pn533_acr122_tx_frame *frame = _frame;
 485
 486         frame->datalen += len;
 487 }
 488
 489 static bool pn533_acr122_is_rx_frame_valid(void *_frame)
 490 {
 491         struct pn533_acr122_rx_frame *frame = _frame;
 492
 493         if (frame->ccid.type != 0x83)
 494                 return false;
 495
 496         if (frame->data[frame->ccid.datalen - 2] == 0x63)
 497                 return false;
 498
 499         return true;
 500 }
 501
 502 static int pn533_acr122_rx_frame_size(void *frame)
 503 {
 504         struct pn533_acr122_rx_frame *f = frame;
 505
 506         /* f->ccid.datalen already includes tail length */
 507         return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
 508 }
 509
 510 static u8 pn533_acr122_get_cmd_code(void *frame)
 511 {
 512         struct pn533_acr122_rx_frame *f = frame;
 513
 514         return PN533_STD_FRAME_CMD(f);
 515 }
 516
 517 static struct pn533_frame_ops pn533_acr122_frame_ops = {
 518         .tx_frame_init = pn533_acr122_tx_frame_init,
 519         .tx_frame_finish = pn533_acr122_tx_frame_finish,
 520         .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
 521         .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
 522         .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
 523
 524         .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
 525         .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
 526         .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
 527         .rx_frame_size = pn533_acr122_rx_frame_size,
 528
 529         .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
 530         .get_cmd_code = pn533_acr122_get_cmd_code,
 531 };
 532
 533 /* The rule: value + checksum = 0 */
 534 static inline u8 pn533_std_checksum(u8 value)
 535 {
 536         return ~value + 1;
 537 }
 538
 539 /* The rule: sum(data elements) + checksum = 0 */
 540 static u8 pn533_std_data_checksum(u8 *data, int datalen)
 541 {
 542         u8 sum = 0;
 543         int i;
 544
 545         for (i = 0; i < datalen; i++)
 546                 sum += data[i];
 547
 548         return pn533_std_checksum(sum);
 549 }
 550
 551 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
 552 {
 553         struct pn533_std_frame *frame = _frame;
 554
 555         frame->preamble = 0;
 556         frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
 557         PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
 558         PN533_STD_FRAME_CMD(frame) = cmd_code;
 559         frame->datalen = 2;
 560 }
 561
 562 static void pn533_std_tx_frame_finish(void *_frame)
 563 {
 564         struct pn533_std_frame *frame = _frame;
 565
 566         frame->datalen_checksum = pn533_std_checksum(frame->datalen);
 567
 568         PN533_STD_FRAME_CHECKSUM(frame) =
 569                 pn533_std_data_checksum(frame->data, frame->datalen);
 570
 571         PN533_STD_FRAME_POSTAMBLE(frame) = 0;
 572 }
 573
 574 static void pn533_std_tx_update_payload_len(void *_frame, int len)
 575 {
 576         struct pn533_std_frame *frame = _frame;
 577
 578         frame->datalen += len;
 579 }
 580
 581 static bool pn533_std_rx_frame_is_valid(void *_frame)
 582 {
 583         u8 checksum;
 584         struct pn533_std_frame *frame = _frame;
 585
 586         if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
 587                 return false;
 588
 589         checksum = pn533_std_checksum(frame->datalen);
 590         if (checksum != frame->datalen_checksum)
 591                 return false;
 592
 593         checksum = pn533_std_data_checksum(frame->data, frame->datalen);
 594         if (checksum != PN533_STD_FRAME_CHECKSUM(frame))
 595                 return false;
 596
 597         return true;
 598 }
 599
 600 static bool pn533_std_rx_frame_is_ack(struct pn533_std_frame *frame)
 601 {
 602         if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
 603                 return false;
 604
 605         if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
 606                 return false;
 607
 608         return true;
 609 }
 610
 611 static inline int pn533_std_rx_frame_size(void *frame)
 612 {
 613         struct pn533_std_frame *f = frame;
 614
 615         return sizeof(struct pn533_std_frame) + f->datalen +
 616                PN533_STD_FRAME_TAIL_LEN;
 617 }
 618
 619 static u8 pn533_std_get_cmd_code(void *frame)
 620 {
 621         struct pn533_std_frame *f = frame;
 622
 623         return PN533_STD_FRAME_CMD(f);
 624 }
 625
 626 static struct pn533_frame_ops pn533_std_frame_ops = {
 627         .tx_frame_init = pn533_std_tx_frame_init,
 628         .tx_frame_finish = pn533_std_tx_frame_finish,
 629         .tx_update_payload_len = pn533_std_tx_update_payload_len,
 630         .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
 631         .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
 632
 633         .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
 634         .rx_frame_size = pn533_std_rx_frame_size,
 635         .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
 636         .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
 637
 638         .max_payload_len =  PN533_STD_FRAME_MAX_PAYLOAD_LEN,
 639         .get_cmd_code = pn533_std_get_cmd_code,
 640 };
 641
 642 static bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
 643 {
 644         return (dev->ops->get_cmd_code(frame) ==
 645                                 PN533_CMD_RESPONSE(dev->cmd->code));
 646 }
 647
 648 static void pn533_recv_response(struct urb *urb)
 649 {
 650         struct pn533 *dev = urb->context;
 651         struct pn533_cmd *cmd = dev->cmd;
 652         u8 *in_frame;
 653
 654         cmd->status = urb->status;
 655
 656         switch (urb->status) {
 657         case 0:
 658                 break; /* success */
 659         case -ECONNRESET:
 660         case -ENOENT:
 661                 nfc_dev_dbg(&dev->interface->dev,
 662                             "The urb has been canceled (status %d)",
 663                             urb->status);
 664                 goto sched_wq;
 665         case -ESHUTDOWN:
 666         default:
 667                 nfc_dev_err(&dev->interface->dev,
 668                             "Urb failure (status %d)", urb->status);
 669                 goto sched_wq;
 670         }
 671
 672         in_frame = dev->in_urb->transfer_buffer;
 673
 674         nfc_dev_dbg(&dev->interface->dev, "Received a frame.");
 675         print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
 676                              dev->ops->rx_frame_size(in_frame), false);
 677
 678         if (!dev->ops->rx_is_frame_valid(in_frame)) {
 679                 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
 680                 cmd->status = -EIO;
 681                 goto sched_wq;
 682         }
 683
 684         if (!pn533_rx_frame_is_cmd_response(dev, in_frame)) {
 685                 nfc_dev_err(&dev->interface->dev,
 686                             "It it not the response to the last command");
 687                 cmd->status = -EIO;
 688                 goto sched_wq;
 689         }
 690
 691 sched_wq:
 692         queue_work(dev->wq, &dev->cmd_complete_work);
 693 }
 694
 695 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
 696 {
 697         dev->in_urb->complete = pn533_recv_response;
 698
 699         return usb_submit_urb(dev->in_urb, flags);
 700 }
 701
 702 static void pn533_recv_ack(struct urb *urb)
 703 {
 704         struct pn533 *dev = urb->context;
 705         struct pn533_cmd *cmd = dev->cmd;
 706         struct pn533_std_frame *in_frame;
 707         int rc;
 708
 709         cmd->status = urb->status;
 710
 711         switch (urb->status) {
 712         case 0:
 713                 break; /* success */
 714         case -ECONNRESET:
 715         case -ENOENT:
 716                 nfc_dev_dbg(&dev->interface->dev,
 717                             "The urb has been stopped (status %d)",
 718                             urb->status);
 719                 goto sched_wq;
 720         case -ESHUTDOWN:
 721         default:
 722                 nfc_dev_err(&dev->interface->dev,
 723                             "Urb failure (status %d)", urb->status);
 724                 goto sched_wq;
 725         }
 726
 727         in_frame = dev->in_urb->transfer_buffer;
 728
 729         if (!pn533_std_rx_frame_is_ack(in_frame)) {
 730                 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
 731                 cmd->status = -EIO;
 732                 goto sched_wq;
 733         }
 734
 735         rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
 736         if (rc) {
 737                 nfc_dev_err(&dev->interface->dev,
 738                             "usb_submit_urb failed with result %d", rc);
 739                 cmd->status = rc;
 740                 goto sched_wq;
 741         }
 742
 743         return;
 744
 745 sched_wq:
 746         queue_work(dev->wq, &dev->cmd_complete_work);
 747 }
 748
 749 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
 750 {
 751         dev->in_urb->complete = pn533_recv_ack;
 752
 753         return usb_submit_urb(dev->in_urb, flags);
 754 }
 755
 756 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
 757 {
 758         u8 ack[PN533_STD_FRAME_ACK_SIZE] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00};
 759         /* spec 7.1.1.3:  Preamble, SoPC (2), ACK Code (2), Postamble */
 760         int rc;
 761
 762         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 763
 764         dev->out_urb->transfer_buffer = ack;
 765         dev->out_urb->transfer_buffer_length = sizeof(ack);
 766         rc = usb_submit_urb(dev->out_urb, flags);
 767
 768         return rc;
 769 }
 770
 771 static int __pn533_send_frame_async(struct pn533 *dev,
 772                                         struct sk_buff *out,
 773                                         struct sk_buff *in,
 774                                         int in_len)
 775 {
 776         int rc;
 777
 778         dev->out_urb->transfer_buffer = out->data;
 779         dev->out_urb->transfer_buffer_length = out->len;
 780
 781         dev->in_urb->transfer_buffer = in->data;
 782         dev->in_urb->transfer_buffer_length = in_len;
 783
 784         print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
 785                              out->data, out->len, false);
 786
 787         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
 788         if (rc)
 789                 return rc;
 790
 791         if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
 792                 /* request for response for sent packet directly */
 793                 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
 794                 if (rc)
 795                         goto error;
 796         } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
 797                 /* request for ACK if that's the case */
 798                 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
 799                 if (rc)
 800                         goto error;
 801         }
 802
 803         return 0;
 804
 805 error:
 806         usb_unlink_urb(dev->out_urb);
 807         return rc;
 808 }
 809
 810 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
 811                                   struct sk_buff *skb)
 812 {
 813         /* payload is already there, just update datalen */
 814         int payload_len = skb->len;
 815         struct pn533_frame_ops *ops = dev->ops;
 816
 817
 818         skb_push(skb, ops->tx_header_len);
 819         skb_put(skb, ops->tx_tail_len);
 820
 821         ops->tx_frame_init(skb->data, cmd_code);
 822         ops->tx_update_payload_len(skb->data, payload_len);
 823         ops->tx_frame_finish(skb->data);
 824 }
 825
 826 static int pn533_send_async_complete(struct pn533 *dev)
 827 {
 828         struct pn533_cmd *cmd = dev->cmd;
 829         int status = cmd->status;
 830
 831         struct sk_buff *req = cmd->req;
 832         struct sk_buff *resp = cmd->resp;
 833
 834         int rc;
 835
 836         dev_kfree_skb(req);
 837
 838         if (status < 0) {
 839                 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
 840                                       ERR_PTR(status));
 841                 dev_kfree_skb(resp);
 842                 goto done;
 843         }
 844
 845         skb_put(resp, dev->ops->rx_frame_size(resp->data));
 846         skb_pull(resp, dev->ops->rx_header_len);
 847         skb_trim(resp, resp->len - dev->ops->rx_tail_len);
 848
 849         rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
 850
 851 done:
 852         kfree(cmd);
 853         dev->cmd = NULL;
 854         return rc;
 855 }
 856
 857 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
 858                               struct sk_buff *req, struct sk_buff *resp,
 859                               int resp_len,
 860                               pn533_send_async_complete_t complete_cb,
 861                               void *complete_cb_context)
 862 {
 863         struct pn533_cmd *cmd;
 864         int rc = 0;
 865
 866         nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x", cmd_code);
 867
 868         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 869         if (!cmd)
 870                 return -ENOMEM;
 871
 872         cmd->code = cmd_code;
 873         cmd->req = req;
 874         cmd->resp = resp;
 875         cmd->resp_len = resp_len;
 876         cmd->complete_cb = complete_cb;
 877         cmd->complete_cb_context = complete_cb_context;
 878
 879         pn533_build_cmd_frame(dev, cmd_code, req);
 880
 881         mutex_lock(&dev->cmd_lock);
 882
 883         if (!dev->cmd_pending) {
 884                 rc = __pn533_send_frame_async(dev, req, resp, resp_len);
 885                 if (rc)
 886                         goto error;
 887
 888                 dev->cmd_pending = 1;
 889                 dev->cmd = cmd;
 890                 goto unlock;
 891         }
 892
 893         nfc_dev_dbg(&dev->interface->dev, "%s Queueing command 0x%x", __func__,
 894                     cmd_code);
 895
 896         INIT_LIST_HEAD(&cmd->queue);
 897         list_add_tail(&cmd->queue, &dev->cmd_queue);
 898
 899         goto unlock;
 900
 901 error:
 902         kfree(cmd);
 903 unlock:
 904         mutex_unlock(&dev->cmd_lock);
 905         return rc;
 906 }
 907
 908 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
 909                                  struct sk_buff *req,
 910                                  pn533_send_async_complete_t complete_cb,
 911                                  void *complete_cb_context)
 912 {
 913         struct sk_buff *resp;
 914         int rc;
 915         int  resp_len = dev->ops->rx_header_len +
 916                         dev->ops->max_payload_len +
 917                         dev->ops->rx_tail_len;
 918
 919         resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
 920         if (!resp)
 921                 return -ENOMEM;
 922
 923         rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
 924                                 complete_cb_context);
 925         if (rc)
 926                 dev_kfree_skb(resp);
 927
 928         return rc;
 929 }
 930
 931 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
 932                                 struct sk_buff *req,
 933                                 pn533_send_async_complete_t complete_cb,
 934                                 void *complete_cb_context)
 935 {
 936         struct sk_buff *resp;
 937         int rc;
 938         int  resp_len = dev->ops->rx_header_len +
 939                         dev->ops->max_payload_len +
 940                         dev->ops->rx_tail_len;
 941
 942         resp = alloc_skb(resp_len, GFP_KERNEL);
 943         if (!resp)
 944                 return -ENOMEM;
 945
 946         rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
 947                                 complete_cb_context);
 948         if (rc)
 949                 dev_kfree_skb(resp);
 950
 951         return rc;
 952 }
 953
 954 /*
 955  * pn533_send_cmd_direct_async
 956  *
 957  * The function sends a piority cmd directly to the chip omiting the cmd
 958  * queue. It's intended to be used by chaining mechanism of received responses
 959  * where the host has to request every single chunk of data before scheduling
 960  * next cmd from the queue.
 961  */
 962 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
 963                                        struct sk_buff *req,
 964                                        pn533_send_async_complete_t complete_cb,
 965                                        void *complete_cb_context)
 966 {
 967         struct sk_buff *resp;
 968         struct pn533_cmd *cmd;
 969         int rc;
 970         int resp_len = dev->ops->rx_header_len +
 971                        dev->ops->max_payload_len +
 972                        dev->ops->rx_tail_len;
 973
 974         resp = alloc_skb(resp_len, GFP_KERNEL);
 975         if (!resp)
 976                 return -ENOMEM;
 977
 978         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 979         if (!cmd) {
 980                 dev_kfree_skb(resp);
 981                 return -ENOMEM;
 982         }
 983
 984         cmd->code = cmd_code;
 985         cmd->req = req;
 986         cmd->resp = resp;
 987         cmd->resp_len = resp_len;
 988         cmd->complete_cb = complete_cb;
 989         cmd->complete_cb_context = complete_cb_context;
 990
 991         pn533_build_cmd_frame(dev, cmd_code, req);
 992
 993         rc = __pn533_send_frame_async(dev, req, resp, resp_len);
 994         if (rc < 0) {
 995                 dev_kfree_skb(resp);
 996                 kfree(cmd);
 997         } else {
 998                 dev->cmd = cmd;
 999         }
1000
1001         return rc;
1002 }
1003
1004 static void pn533_wq_cmd_complete(struct work_struct *work)
1005 {
1006         struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
1007         int rc;
1008
1009         rc = pn533_send_async_complete(dev);
1010         if (rc != -EINPROGRESS)
1011                 queue_work(dev->wq, &dev->cmd_work);
1012 }
1013
1014 static void pn533_wq_cmd(struct work_struct *work)
1015 {
1016         struct pn533 *dev = container_of(work, struct pn533, cmd_work);
1017         struct pn533_cmd *cmd;
1018         int rc;
1019
1020         mutex_lock(&dev->cmd_lock);
1021
1022         if (list_empty(&dev->cmd_queue)) {
1023                 dev->cmd_pending = 0;
1024                 mutex_unlock(&dev->cmd_lock);
1025                 return;
1026         }
1027
1028         cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
1029
1030         list_del(&cmd->queue);
1031
1032         mutex_unlock(&dev->cmd_lock);
1033
1034         rc = __pn533_send_frame_async(dev, cmd->req, cmd->resp, cmd->resp_len);
1035         if (rc < 0) {
1036                 dev_kfree_skb(cmd->req);
1037                 dev_kfree_skb(cmd->resp);
1038                 kfree(cmd);
1039                 return;
1040         }
1041
1042         dev->cmd = cmd;
1043 }
1044
1045 struct pn533_sync_cmd_response {
1046         struct sk_buff *resp;
1047         struct completion done;
1048 };
1049
1050 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
1051                                     struct sk_buff *resp)
1052 {
1053         struct pn533_sync_cmd_response *arg = _arg;
1054
1055         arg->resp = resp;
1056         complete(&arg->done);
1057
1058         return 0;
1059 }
1060
1061 /*  pn533_send_cmd_sync
1062  *
1063  *  Please note the req parameter is freed inside the function to
1064  *  limit a number of return value interpretations by the caller.
1065  *
1066  *  1. negative in case of error during TX path -> req should be freed
1067  *
1068  *  2. negative in case of error during RX path -> req should not be freed
1069  *     as it's been already freed at the begining of RX path by
1070  *     async_complete_cb.
1071  *
1072  *  3. valid pointer in case of succesfult RX path
1073  *
1074  *  A caller has to check a return value with IS_ERR macro. If the test pass,
1075  *  the returned pointer is valid.
1076  *
1077  * */
1078 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1079                                                struct sk_buff *req)
1080 {
1081         int rc;
1082         struct pn533_sync_cmd_response arg;
1083
1084         init_completion(&arg.done);
1085
1086         rc = pn533_send_cmd_async(dev, cmd_code, req,
1087                                   pn533_send_sync_complete, &arg);
1088         if (rc) {
1089                 dev_kfree_skb(req);
1090                 return ERR_PTR(rc);
1091         }
1092
1093         wait_for_completion(&arg.done);
1094
1095         return arg.resp;
1096 }
1097
1098 static void pn533_send_complete(struct urb *urb)
1099 {
1100         struct pn533 *dev = urb->context;
1101
1102         switch (urb->status) {
1103         case 0:
1104                 break; /* success */
1105         case -ECONNRESET:
1106         case -ENOENT:
1107                 nfc_dev_dbg(&dev->interface->dev,
1108                             "The urb has been stopped (status %d)",
1109                             urb->status);
1110                 break;
1111         case -ESHUTDOWN:
1112         default:
1113                 nfc_dev_err(&dev->interface->dev,
1114                             "Urb failure (status %d)", urb->status);
1115         }
1116 }
1117
1118 static void pn533_abort_cmd(struct pn533 *dev, gfp_t flags)
1119 {
1120         /* ACR122U does not support any command which aborts last
1121          * issued command i.e. as ACK for standard PN533. Additionally,
1122          * it behaves stange, sending broken or incorrect responses,
1123          * when we cancel urb before the chip will send response.
1124          */
1125         if (dev->device_type == PN533_DEVICE_ACR122U)
1126                 return;
1127
1128         /* An ack will cancel the last issued command */
1129         pn533_send_ack(dev, flags);
1130
1131         /* cancel the urb request */
1132         usb_kill_urb(dev->in_urb);
1133 }
1134
1135 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
1136 {
1137         struct sk_buff *skb;
1138
1139         skb = alloc_skb(dev->ops->tx_header_len +
1140                         size +
1141                         dev->ops->tx_tail_len, GFP_KERNEL);
1142
1143         if (skb)
1144                 skb_reserve(skb, dev->ops->tx_header_len);
1145
1146         return skb;
1147 }
1148
1149 struct pn533_target_type_a {
1150         __be16 sens_res;
1151         u8 sel_res;
1152         u8 nfcid_len;
1153         u8 nfcid_data[];
1154 } __packed;
1155
1156
1157 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1158 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1159 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1160
1161 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1162 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1163
1164 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1165 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1166
1167 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
1168 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
1169 #define PN533_TYPE_A_SEL_PROT_DEP 2
1170 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1171
1172 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1173                                                         int target_data_len)
1174 {
1175         u8 ssd;
1176         u8 platconf;
1177
1178         if (target_data_len < sizeof(struct pn533_target_type_a))
1179                 return false;
1180
1181         /* The lenght check of nfcid[] and ats[] are not being performed because
1182            the values are not being used */
1183
1184         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1185         ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1186         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1187
1188         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1189              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1190             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1191              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1192                 return false;
1193
1194         /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1195         if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1196                 return false;
1197
1198         return true;
1199 }
1200
1201 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1202                                                         int tgt_data_len)
1203 {
1204         struct pn533_target_type_a *tgt_type_a;
1205
1206         tgt_type_a = (struct pn533_target_type_a *)tgt_data;
1207
1208         if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1209                 return -EPROTO;
1210
1211         switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1212         case PN533_TYPE_A_SEL_PROT_MIFARE:
1213                 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1214                 break;
1215         case PN533_TYPE_A_SEL_PROT_ISO14443:
1216                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1217                 break;
1218         case PN533_TYPE_A_SEL_PROT_DEP:
1219                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1220                 break;
1221         case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1222                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1223                                                         NFC_PROTO_NFC_DEP_MASK;
1224                 break;
1225         }
1226
1227         nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1228         nfc_tgt->sel_res = tgt_type_a->sel_res;
1229         nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1230         memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
1231
1232         return 0;
1233 }
1234
1235 struct pn533_target_felica {
1236         u8 pol_res;
1237         u8 opcode;
1238         u8 nfcid2[NFC_NFCID2_MAXSIZE];
1239         u8 pad[8];
1240         /* optional */
1241         u8 syst_code[];
1242 } __packed;
1243
1244 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1245 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1246
1247 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1248                                                         int target_data_len)
1249 {
1250         if (target_data_len < sizeof(struct pn533_target_felica))
1251                 return false;
1252
1253         if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1254                 return false;
1255
1256         return true;
1257 }
1258
1259 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1260                                                         int tgt_data_len)
1261 {
1262         struct pn533_target_felica *tgt_felica;
1263
1264         tgt_felica = (struct pn533_target_felica *)tgt_data;
1265
1266         if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1267                 return -EPROTO;
1268
1269         if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
1270             (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
1271                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1272         else
1273                 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1274
1275         memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1276         nfc_tgt->sensf_res_len = 9;
1277
1278         memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
1279         nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
1280
1281         return 0;
1282 }
1283
1284 struct pn533_target_jewel {
1285         __be16 sens_res;
1286         u8 jewelid[4];
1287 } __packed;
1288
1289 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1290                                                         int target_data_len)
1291 {
1292         u8 ssd;
1293         u8 platconf;
1294
1295         if (target_data_len < sizeof(struct pn533_target_jewel))
1296                 return false;
1297
1298         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1299         ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1300         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1301
1302         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1303              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1304             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1305              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1306                 return false;
1307
1308         return true;
1309 }
1310
1311 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1312                                                         int tgt_data_len)
1313 {
1314         struct pn533_target_jewel *tgt_jewel;
1315
1316         tgt_jewel = (struct pn533_target_jewel *)tgt_data;
1317
1318         if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1319                 return -EPROTO;
1320
1321         nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1322         nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
1323         nfc_tgt->nfcid1_len = 4;
1324         memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
1325
1326         return 0;
1327 }
1328
1329 struct pn533_type_b_prot_info {
1330         u8 bitrate;
1331         u8 fsci_type;
1332         u8 fwi_adc_fo;
1333 } __packed;
1334
1335 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1336 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1337 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1338
1339 struct pn533_type_b_sens_res {
1340         u8 opcode;
1341         u8 nfcid[4];
1342         u8 appdata[4];
1343         struct pn533_type_b_prot_info prot_info;
1344 } __packed;
1345
1346 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
1347
1348 struct pn533_target_type_b {
1349         struct pn533_type_b_sens_res sensb_res;
1350         u8 attrib_res_len;
1351         u8 attrib_res[];
1352 } __packed;
1353
1354 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1355                                                         int target_data_len)
1356 {
1357         if (target_data_len < sizeof(struct pn533_target_type_b))
1358                 return false;
1359
1360         if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1361                 return false;
1362
1363         if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1364                                                 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1365                 return false;
1366
1367         return true;
1368 }
1369
1370 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1371                                                         int tgt_data_len)
1372 {
1373         struct pn533_target_type_b *tgt_type_b;
1374
1375         tgt_type_b = (struct pn533_target_type_b *)tgt_data;
1376
1377         if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1378                 return -EPROTO;
1379
1380         nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
1381
1382         return 0;
1383 }
1384
1385 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
1386                               int tgdata_len)
1387 {
1388         struct nfc_target nfc_tgt;
1389         int rc;
1390
1391         nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
1392                     dev->poll_mod_curr);
1393
1394         if (tg != 1)
1395                 return -EPROTO;
1396
1397         memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1398
1399         switch (dev->poll_mod_curr) {
1400         case PN533_POLL_MOD_106KBPS_A:
1401                 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
1402                 break;
1403         case PN533_POLL_MOD_212KBPS_FELICA:
1404         case PN533_POLL_MOD_424KBPS_FELICA:
1405                 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
1406                 break;
1407         case PN533_POLL_MOD_106KBPS_JEWEL:
1408                 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
1409                 break;
1410         case PN533_POLL_MOD_847KBPS_B:
1411                 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
1412                 break;
1413         default:
1414                 nfc_dev_err(&dev->interface->dev,
1415                             "Unknown current poll modulation");
1416                 return -EPROTO;
1417         }
1418
1419         if (rc)
1420                 return rc;
1421
1422         if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1423                 nfc_dev_dbg(&dev->interface->dev,
1424                             "The Tg found doesn't have the desired protocol");
1425                 return -EAGAIN;
1426         }
1427
1428         nfc_dev_dbg(&dev->interface->dev,
1429                     "Target found - supported protocols: 0x%x",
1430                     nfc_tgt.supported_protocols);
1431
1432         dev->tgt_available_prots = nfc_tgt.supported_protocols;
1433
1434         nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1435
1436         return 0;
1437 }
1438
1439 static inline void pn533_poll_next_mod(struct pn533 *dev)
1440 {
1441         dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1442 }
1443
1444 static void pn533_poll_reset_mod_list(struct pn533 *dev)
1445 {
1446         dev->poll_mod_count = 0;
1447 }
1448
1449 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1450 {
1451         dev->poll_mod_active[dev->poll_mod_count] =
1452                 (struct pn533_poll_modulations *)&poll_mod[mod_index];
1453         dev->poll_mod_count++;
1454 }
1455
1456 static void pn533_poll_create_mod_list(struct pn533 *dev,
1457                                        u32 im_protocols, u32 tm_protocols)
1458 {
1459         pn533_poll_reset_mod_list(dev);
1460
1461         if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
1462             (im_protocols & NFC_PROTO_ISO14443_MASK) ||
1463             (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1464                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1465
1466         if (im_protocols & NFC_PROTO_FELICA_MASK ||
1467             im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1468                 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1469                 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1470         }
1471
1472         if (im_protocols & NFC_PROTO_JEWEL_MASK)
1473                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1474
1475         if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1476                 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1477
1478         if (tm_protocols)
1479                 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
1480 }
1481
1482 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
1483 {
1484         u8 nbtg, tg, *tgdata;
1485         int rc, tgdata_len;
1486
1487         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1488
1489         nbtg = resp->data[0];
1490         tg = resp->data[1];
1491         tgdata = &resp->data[2];
1492         tgdata_len = resp->len - 2;  /* nbtg + tg */
1493
1494         if (nbtg) {
1495                 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1496
1497                 /* We must stop the poll after a valid target found */
1498                 if (rc == 0) {
1499                         pn533_poll_reset_mod_list(dev);
1500                         return 0;
1501                 }
1502         }
1503
1504         return -EAGAIN;
1505 }
1506
1507 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1508 {
1509         struct sk_buff *skb;
1510         u8 *felica, *nfcid3, *gb;
1511
1512         u8 *gbytes = dev->gb;
1513         size_t gbytes_len = dev->gb_len;
1514
1515         u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1516                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1517                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1518                                 0xff, 0xff}; /* System code */
1519
1520         u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1521                                0x0, 0x0, 0x0,
1522                                0x40}; /* SEL_RES for DEP */
1523
1524         unsigned int skb_len = 36 + /* mode (1), mifare (6),
1525                                        felica (18), nfcid3 (10), gb_len (1) */
1526                                gbytes_len +
1527                                1;  /* len Tk*/
1528
1529         skb = pn533_alloc_skb(dev, skb_len);
1530         if (!skb)
1531                 return NULL;
1532
1533         /* DEP support only */
1534         *skb_put(skb, 1) = PN533_INIT_TARGET_DEP;
1535
1536         /* MIFARE params */
1537         memcpy(skb_put(skb, 6), mifare_params, 6);
1538
1539         /* Felica params */
1540         felica = skb_put(skb, 18);
1541         memcpy(felica, felica_params, 18);
1542         get_random_bytes(felica + 2, 6);
1543
1544         /* NFCID3 */
1545         nfcid3 = skb_put(skb, 10);
1546         memset(nfcid3, 0, 10);
1547         memcpy(nfcid3, felica, 8);
1548
1549         /* General bytes */
1550         *skb_put(skb, 1) = gbytes_len;
1551
1552         gb = skb_put(skb, gbytes_len);
1553         memcpy(gb, gbytes, gbytes_len);
1554
1555         /* Len Tk */
1556         *skb_put(skb, 1) = 0;
1557
1558         return skb;
1559 }
1560
1561 #define PN533_CMD_DATAEXCH_HEAD_LEN 1
1562 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1563 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1564                                       struct sk_buff *resp)
1565 {
1566         u8 status;
1567
1568         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1569
1570         if (IS_ERR(resp))
1571                 return PTR_ERR(resp);
1572
1573         status = resp->data[0];
1574         skb_pull(resp, sizeof(status));
1575
1576         if (status != 0) {
1577                 nfc_tm_deactivated(dev->nfc_dev);
1578                 dev->tgt_mode = 0;
1579                 dev_kfree_skb(resp);
1580                 return 0;
1581         }
1582
1583         return nfc_tm_data_received(dev->nfc_dev, resp);
1584 }
1585
1586 static void pn533_wq_tg_get_data(struct work_struct *work)
1587 {
1588         struct pn533 *dev = container_of(work, struct pn533, tg_work);
1589
1590         struct sk_buff *skb;
1591         int rc;
1592
1593         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1594
1595         skb = pn533_alloc_skb(dev, 0);
1596         if (!skb)
1597                 return;
1598
1599         rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1600                                    pn533_tm_get_data_complete, NULL);
1601
1602         if (rc < 0)
1603                 dev_kfree_skb(skb);
1604
1605         return;
1606 }
1607
1608 #define ATR_REQ_GB_OFFSET 17
1609 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1610 {
1611         u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1612         size_t gb_len;
1613         int rc;
1614
1615         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1616
1617         if (resp->len < ATR_REQ_GB_OFFSET + 1)
1618                 return -EINVAL;
1619
1620         mode = resp->data[0];
1621         cmd = &resp->data[1];
1622
1623         nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x len %d\n",
1624                     mode, resp->len);
1625
1626         if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1627             PN533_INIT_TARGET_RESP_ACTIVE)
1628                 comm_mode = NFC_COMM_ACTIVE;
1629
1630         if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0)  /* Only DEP supported */
1631                 return -EOPNOTSUPP;
1632
1633         gb = cmd + ATR_REQ_GB_OFFSET;
1634         gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1635
1636         rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1637                               comm_mode, gb, gb_len);
1638         if (rc < 0) {
1639                 nfc_dev_err(&dev->interface->dev,
1640                             "Error when signaling target activation");
1641                 return rc;
1642         }
1643
1644         dev->tgt_mode = 1;
1645         queue_work(dev->wq, &dev->tg_work);
1646
1647         return 0;
1648 }
1649
1650 static void pn533_listen_mode_timer(unsigned long data)
1651 {
1652         struct pn533 *dev = (struct pn533 *)data;
1653
1654         nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1655
1656         dev->cancel_listen = 1;
1657
1658         pn533_poll_next_mod(dev);
1659
1660         queue_work(dev->wq, &dev->poll_work);
1661 }
1662
1663 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1664                                struct sk_buff *resp)
1665 {
1666         struct pn533_poll_modulations *cur_mod;
1667         int rc;
1668
1669         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1670
1671         if (IS_ERR(resp)) {
1672                 rc = PTR_ERR(resp);
1673
1674                 nfc_dev_err(&dev->interface->dev, "%s  Poll complete error %d",
1675                             __func__, rc);
1676
1677                 if (rc == -ENOENT) {
1678                         if (dev->poll_mod_count != 0)
1679                                 return rc;
1680                         else
1681                                 goto stop_poll;
1682                 } else if (rc < 0) {
1683                         nfc_dev_err(&dev->interface->dev,
1684                                     "Error %d when running poll", rc);
1685                         goto stop_poll;
1686                 }
1687         }
1688
1689         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1690
1691         if (cur_mod->len == 0) { /* Target mode */
1692                 del_timer(&dev->listen_timer);
1693                 rc = pn533_init_target_complete(dev, resp);
1694                 goto done;
1695         }
1696
1697         /* Initiator mode */
1698         rc = pn533_start_poll_complete(dev, resp);
1699         if (!rc)
1700                 goto done;
1701
1702         if (!dev->poll_mod_count) {
1703                 nfc_dev_dbg(&dev->interface->dev, "Polling has been stopped.");
1704                 goto done;
1705         }
1706
1707         pn533_poll_next_mod(dev);
1708         queue_work(dev->wq, &dev->poll_work);
1709
1710 done:
1711         dev_kfree_skb(resp);
1712         return rc;
1713
1714 stop_poll:
1715         nfc_dev_err(&dev->interface->dev, "Polling operation has been stopped");
1716
1717         pn533_poll_reset_mod_list(dev);
1718         dev->poll_protocols = 0;
1719         return rc;
1720 }
1721
1722 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1723                                         struct pn533_poll_modulations *mod)
1724 {
1725         struct sk_buff *skb;
1726
1727         skb = pn533_alloc_skb(dev, mod->len);
1728         if (!skb)
1729                 return NULL;
1730
1731         memcpy(skb_put(skb, mod->len), &mod->data, mod->len);
1732
1733         return skb;
1734 }
1735
1736 static int pn533_send_poll_frame(struct pn533 *dev)
1737 {
1738         struct pn533_poll_modulations *mod;
1739         struct sk_buff *skb;
1740         int rc;
1741         u8 cmd_code;
1742
1743         mod = dev->poll_mod_active[dev->poll_mod_curr];
1744
1745         nfc_dev_dbg(&dev->interface->dev, "%s mod len %d\n",
1746                     __func__, mod->len);
1747
1748         if (mod->len == 0) {  /* Listen mode */
1749                 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1750                 skb = pn533_alloc_poll_tg_frame(dev);
1751         } else {  /* Polling mode */
1752                 cmd_code =  PN533_CMD_IN_LIST_PASSIVE_TARGET;
1753                 skb = pn533_alloc_poll_in_frame(dev, mod);
1754         }
1755
1756         if (!skb) {
1757                 nfc_dev_err(&dev->interface->dev, "Failed to allocate skb.");
1758                 return -ENOMEM;
1759         }
1760
1761         rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1762                                   NULL);
1763         if (rc < 0) {
1764                 dev_kfree_skb(skb);
1765                 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
1766         }
1767
1768         return rc;
1769 }
1770
1771 static void pn533_wq_poll(struct work_struct *work)
1772 {
1773         struct pn533 *dev = container_of(work, struct pn533, poll_work);
1774         struct pn533_poll_modulations *cur_mod;
1775         int rc;
1776
1777         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1778
1779         nfc_dev_dbg(&dev->interface->dev,
1780                     "%s cancel_listen %d modulation len %d",
1781                     __func__, dev->cancel_listen, cur_mod->len);
1782
1783         if (dev->cancel_listen == 1) {
1784                 dev->cancel_listen = 0;
1785                 pn533_abort_cmd(dev, GFP_ATOMIC);
1786         }
1787
1788         rc = pn533_send_poll_frame(dev);
1789         if (rc)
1790                 return;
1791
1792         if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1793                 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1794
1795         return;
1796 }
1797
1798 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1799                             u32 im_protocols, u32 tm_protocols)
1800 {
1801         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1802
1803         nfc_dev_dbg(&dev->interface->dev,
1804                     "%s: im protocols 0x%x tm protocols 0x%x",
1805                     __func__, im_protocols, tm_protocols);
1806
1807         if (dev->tgt_active_prot) {
1808                 nfc_dev_err(&dev->interface->dev,
1809                             "Cannot poll with a target already activated");
1810                 return -EBUSY;
1811         }
1812
1813         if (dev->tgt_mode) {
1814                 nfc_dev_err(&dev->interface->dev,
1815                             "Cannot poll while already being activated");
1816                 return -EBUSY;
1817         }
1818
1819         if (tm_protocols) {
1820                 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1821                 if (dev->gb == NULL)
1822                         tm_protocols = 0;
1823         }
1824
1825         dev->poll_mod_curr = 0;
1826         pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1827         dev->poll_protocols = im_protocols;
1828         dev->listen_protocols = tm_protocols;
1829
1830         return pn533_send_poll_frame(dev);
1831 }
1832
1833 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1834 {
1835         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1836
1837         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1838
1839         del_timer(&dev->listen_timer);
1840
1841         if (!dev->poll_mod_count) {
1842                 nfc_dev_dbg(&dev->interface->dev,
1843                             "Polling operation was not running");
1844                 return;
1845         }
1846
1847         pn533_abort_cmd(dev, GFP_KERNEL);
1848         pn533_poll_reset_mod_list(dev);
1849 }
1850
1851 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1852 {
1853         struct pn533_cmd_activate_response *rsp;
1854         u16 gt_len;
1855         int rc;
1856
1857         struct sk_buff *skb;
1858         struct sk_buff *resp;
1859
1860         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1861
1862         skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1863         if (!skb)
1864                 return -ENOMEM;
1865
1866         *skb_put(skb, sizeof(u8)) = 1; /* TG */
1867         *skb_put(skb, sizeof(u8)) = 0; /* Next */
1868
1869         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1870         if (IS_ERR(resp))
1871                 return PTR_ERR(resp);
1872
1873         rsp = (struct pn533_cmd_activate_response *)resp->data;
1874         rc = rsp->status & PN533_CMD_RET_MASK;
1875         if (rc != PN533_CMD_RET_SUCCESS) {
1876                 nfc_dev_err(&dev->interface->dev,
1877                             "Target activation failed (error 0x%x)", rc);
1878                 dev_kfree_skb(resp);
1879                 return -EIO;
1880         }
1881
1882         /* ATR_RES general bytes are located at offset 16 */
1883         gt_len = resp->len - 16;
1884         rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1885
1886         dev_kfree_skb(resp);
1887         return rc;
1888 }
1889
1890 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1891                                  struct nfc_target *target, u32 protocol)
1892 {
1893         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1894         int rc;
1895
1896         nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1897                     protocol);
1898
1899         if (dev->poll_mod_count) {
1900                 nfc_dev_err(&dev->interface->dev,
1901                             "Cannot activate while polling");
1902                 return -EBUSY;
1903         }
1904
1905         if (dev->tgt_active_prot) {
1906                 nfc_dev_err(&dev->interface->dev,
1907                             "There is already an active target");
1908                 return -EBUSY;
1909         }
1910
1911         if (!dev->tgt_available_prots) {
1912                 nfc_dev_err(&dev->interface->dev,
1913                             "There is no available target to activate");
1914                 return -EINVAL;
1915         }
1916
1917         if (!(dev->tgt_available_prots & (1 << protocol))) {
1918                 nfc_dev_err(&dev->interface->dev,
1919                             "Target doesn't support requested proto %u",
1920                             protocol);
1921                 return -EINVAL;
1922         }
1923
1924         if (protocol == NFC_PROTO_NFC_DEP) {
1925                 rc = pn533_activate_target_nfcdep(dev);
1926                 if (rc) {
1927                         nfc_dev_err(&dev->interface->dev,
1928                                     "Activating target with DEP failed %d", rc);
1929                         return rc;
1930                 }
1931         }
1932
1933         dev->tgt_active_prot = protocol;
1934         dev->tgt_available_prots = 0;
1935
1936         return 0;
1937 }
1938
1939 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1940                                     struct nfc_target *target)
1941 {
1942         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1943
1944         struct sk_buff *skb;
1945         struct sk_buff *resp;
1946
1947         int rc;
1948
1949         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1950
1951         if (!dev->tgt_active_prot) {
1952                 nfc_dev_err(&dev->interface->dev, "There is no active target");
1953                 return;
1954         }
1955
1956         dev->tgt_active_prot = 0;
1957         skb_queue_purge(&dev->resp_q);
1958
1959         skb = pn533_alloc_skb(dev, sizeof(u8));
1960         if (!skb)
1961                 return;
1962
1963         *skb_put(skb, 1) = 1; /* TG*/
1964
1965         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1966         if (IS_ERR(resp))
1967                 return;
1968
1969         rc = resp->data[0] & PN533_CMD_RET_MASK;
1970         if (rc != PN533_CMD_RET_SUCCESS)
1971                 nfc_dev_err(&dev->interface->dev,
1972                             "Error 0x%x when releasing the target", rc);
1973
1974         dev_kfree_skb(resp);
1975         return;
1976 }
1977
1978
1979 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1980                                          struct sk_buff *resp)
1981 {
1982         struct pn533_cmd_jump_dep_response *rsp;
1983         u8 target_gt_len;
1984         int rc;
1985         u8 active = *(u8 *)arg;
1986
1987         kfree(arg);
1988
1989         if (IS_ERR(resp))
1990                 return PTR_ERR(resp);
1991
1992         if (dev->tgt_available_prots &&
1993             !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1994                 nfc_dev_err(&dev->interface->dev,
1995                             "The target does not support DEP");
1996                 rc =  -EINVAL;
1997                 goto error;
1998         }
1999
2000         rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
2001
2002         rc = rsp->status & PN533_CMD_RET_MASK;
2003         if (rc != PN533_CMD_RET_SUCCESS) {
2004                 nfc_dev_err(&dev->interface->dev,
2005                             "Bringing DEP link up failed (error 0x%x)", rc);
2006                 goto error;
2007         }
2008
2009         if (!dev->tgt_available_prots) {
2010                 struct nfc_target nfc_target;
2011
2012                 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
2013
2014                 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2015                 nfc_target.nfcid1_len = 10;
2016                 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
2017                 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
2018                 if (rc)
2019                         goto error;
2020
2021                 dev->tgt_available_prots = 0;
2022         }
2023
2024         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
2025
2026         /* ATR_RES general bytes are located at offset 17 */
2027         target_gt_len = resp->len - 17;
2028         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
2029                                           rsp->gt, target_gt_len);
2030         if (rc == 0)
2031                 rc = nfc_dep_link_is_up(dev->nfc_dev,
2032                                         dev->nfc_dev->targets[0].idx,
2033                                         !active, NFC_RF_INITIATOR);
2034
2035 error:
2036         dev_kfree_skb(resp);
2037         return rc;
2038 }
2039
2040 static int pn533_mod_to_baud(struct pn533 *dev)
2041 {
2042         switch (dev->poll_mod_curr) {
2043         case PN533_POLL_MOD_106KBPS_A:
2044                 return 0;
2045         case PN533_POLL_MOD_212KBPS_FELICA:
2046                 return 1;
2047         case PN533_POLL_MOD_424KBPS_FELICA:
2048                 return 2;
2049         default:
2050                 return -EINVAL;
2051         }
2052 }
2053
2054 #define PASSIVE_DATA_LEN 5
2055 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
2056                              u8 comm_mode, u8 *gb, size_t gb_len)
2057 {
2058         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2059         struct sk_buff *skb;
2060         int rc, baud, skb_len;
2061         u8 *next, *arg;
2062
2063         u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
2064
2065         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2066
2067         if (dev->poll_mod_count) {
2068                 nfc_dev_err(&dev->interface->dev,
2069                             "Cannot bring the DEP link up while polling");
2070                 return -EBUSY;
2071         }
2072
2073         if (dev->tgt_active_prot) {
2074                 nfc_dev_err(&dev->interface->dev,
2075                             "There is already an active target");
2076                 return -EBUSY;
2077         }
2078
2079         baud = pn533_mod_to_baud(dev);
2080         if (baud < 0) {
2081                 nfc_dev_err(&dev->interface->dev,
2082                             "Invalid curr modulation %d", dev->poll_mod_curr);
2083                 return baud;
2084         }
2085
2086         skb_len = 3 + gb_len; /* ActPass + BR + Next */
2087         if (comm_mode == NFC_COMM_PASSIVE)
2088                 skb_len += PASSIVE_DATA_LEN;
2089
2090         if (target && target->nfcid2_len)
2091                 skb_len += NFC_NFCID3_MAXSIZE;
2092
2093         skb = pn533_alloc_skb(dev, skb_len);
2094         if (!skb)
2095                 return -ENOMEM;
2096
2097         *skb_put(skb, 1) = !comm_mode;  /* ActPass */
2098         *skb_put(skb, 1) = baud;  /* Baud rate */
2099
2100         next = skb_put(skb, 1);  /* Next */
2101         *next = 0;
2102
2103         if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
2104                 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
2105                        PASSIVE_DATA_LEN);
2106                 *next |= 1;
2107         }
2108
2109         if (target && target->nfcid2_len) {
2110                 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2111                        target->nfcid2_len);
2112                 *next |= 2;
2113         }
2114
2115         if (gb != NULL && gb_len > 0) {
2116                 memcpy(skb_put(skb, gb_len), gb, gb_len);
2117                 *next |= 4; /* We have some Gi */
2118         } else {
2119                 *next = 0;
2120         }
2121
2122         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2123         if (!arg) {
2124                 dev_kfree_skb(skb);
2125                 return -ENOMEM;
2126         }
2127
2128         *arg = !comm_mode;
2129
2130         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2131                                   pn533_in_dep_link_up_complete, arg);
2132
2133         if (rc < 0) {
2134                 dev_kfree_skb(skb);
2135                 kfree(arg);
2136         }
2137
2138         return rc;
2139 }
2140
2141 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2142 {
2143         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2144
2145         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2146
2147         pn533_poll_reset_mod_list(dev);
2148
2149         if (dev->tgt_mode || dev->tgt_active_prot)
2150                 pn533_abort_cmd(dev, GFP_KERNEL);
2151
2152         dev->tgt_active_prot = 0;
2153         dev->tgt_mode = 0;
2154
2155         skb_queue_purge(&dev->resp_q);
2156
2157         return 0;
2158 }
2159
2160 struct pn533_data_exchange_arg {
2161         data_exchange_cb_t cb;
2162         void *cb_context;
2163 };
2164
2165 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2166 {
2167         struct sk_buff *skb, *tmp, *t;
2168         unsigned int skb_len = 0, tmp_len = 0;
2169
2170         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2171
2172         if (skb_queue_empty(&dev->resp_q))
2173                 return NULL;
2174
2175         if (skb_queue_len(&dev->resp_q) == 1) {
2176                 skb = skb_dequeue(&dev->resp_q);
2177                 goto out;
2178         }
2179
2180         skb_queue_walk_safe(&dev->resp_q, tmp, t)
2181                 skb_len += tmp->len;
2182
2183         nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2184                     __func__, skb_len);
2185
2186         skb = alloc_skb(skb_len, GFP_KERNEL);
2187         if (skb == NULL)
2188                 goto out;
2189
2190         skb_put(skb, skb_len);
2191
2192         skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2193                 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2194                 tmp_len += tmp->len;
2195         }
2196
2197 out:
2198         skb_queue_purge(&dev->resp_q);
2199
2200         return skb;
2201 }
2202
2203 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2204                                         struct sk_buff *resp)
2205 {
2206         struct pn533_data_exchange_arg *arg = _arg;
2207         struct sk_buff *skb;
2208         int rc = 0;
2209         u8 status, ret, mi;
2210
2211         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2212
2213         if (IS_ERR(resp)) {
2214                 rc = PTR_ERR(resp);
2215                 goto _error;
2216         }
2217
2218         status = resp->data[0];
2219         ret = status & PN533_CMD_RET_MASK;
2220         mi = status & PN533_CMD_MI_MASK;
2221
2222         skb_pull(resp, sizeof(status));
2223
2224         if (ret != PN533_CMD_RET_SUCCESS) {
2225                 nfc_dev_err(&dev->interface->dev,
2226                             "Exchanging data failed (error 0x%x)", ret);
2227                 rc = -EIO;
2228                 goto error;
2229         }
2230
2231         skb_queue_tail(&dev->resp_q, resp);
2232
2233         if (mi) {
2234                 dev->cmd_complete_mi_arg = arg;
2235                 queue_work(dev->wq, &dev->mi_work);
2236                 return -EINPROGRESS;
2237         }
2238
2239         skb = pn533_build_response(dev);
2240         if (!skb)
2241                 goto error;
2242
2243         arg->cb(arg->cb_context, skb, 0);
2244         kfree(arg);
2245         return 0;
2246
2247 error:
2248         dev_kfree_skb(resp);
2249 _error:
2250         skb_queue_purge(&dev->resp_q);
2251         arg->cb(arg->cb_context, NULL, rc);
2252         kfree(arg);
2253         return rc;
2254 }
2255
2256 static int pn533_transceive(struct nfc_dev *nfc_dev,
2257                             struct nfc_target *target, struct sk_buff *skb,
2258                             data_exchange_cb_t cb, void *cb_context)
2259 {
2260         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2261         struct pn533_data_exchange_arg *arg = NULL;
2262         int rc;
2263
2264         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2265
2266         if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2267                 /* TODO: Implement support to multi-part data exchange */
2268                 nfc_dev_err(&dev->interface->dev,
2269                             "Data length greater than the max allowed: %d",
2270                             PN533_CMD_DATAEXCH_DATA_MAXLEN);
2271                 rc = -ENOSYS;
2272                 goto error;
2273         }
2274
2275         if (!dev->tgt_active_prot) {
2276                 nfc_dev_err(&dev->interface->dev,
2277                             "Can't exchange data if there is no active target");
2278                 rc = -EINVAL;
2279                 goto error;
2280         }
2281
2282         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2283         if (!arg) {
2284                 rc = -ENOMEM;
2285                 goto error;
2286         }
2287
2288         arg->cb = cb;
2289         arg->cb_context = cb_context;
2290
2291         switch (dev->device_type) {
2292         case PN533_DEVICE_PASORI:
2293                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2294                         rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2295                                                    skb,
2296                                                    pn533_data_exchange_complete,
2297                                                    arg);
2298
2299                         break;
2300                 }
2301         default:
2302                 *skb_push(skb, sizeof(u8)) =  1; /*TG*/
2303
2304                 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2305                                            skb, pn533_data_exchange_complete,
2306                                            arg);
2307
2308                 break;
2309         }
2310
2311         if (rc < 0) /* rc from send_async */
2312                 goto error;
2313
2314         return 0;
2315
2316 error:
2317         kfree(arg);
2318         dev_kfree_skb(skb);
2319         return rc;
2320 }
2321
2322 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2323                                   struct sk_buff *resp)
2324 {
2325         u8 status;
2326
2327         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2328
2329         if (IS_ERR(resp))
2330                 return PTR_ERR(resp);
2331
2332         status = resp->data[0];
2333
2334         dev_kfree_skb(resp);
2335
2336         if (status != 0) {
2337                 nfc_tm_deactivated(dev->nfc_dev);
2338
2339                 dev->tgt_mode = 0;
2340
2341                 return 0;
2342         }
2343
2344         queue_work(dev->wq, &dev->tg_work);
2345
2346         return 0;
2347 }
2348
2349 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2350 {
2351         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2352         int rc;
2353
2354         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2355
2356         if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2357                 nfc_dev_err(&dev->interface->dev,
2358                             "Data length greater than the max allowed: %d",
2359                             PN533_CMD_DATAEXCH_DATA_MAXLEN);
2360                 return -ENOSYS;
2361         }
2362
2363         rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2364                                    pn533_tm_send_complete, NULL);
2365         if (rc < 0)
2366                 dev_kfree_skb(skb);
2367
2368         return rc;
2369 }
2370
2371 static void pn533_wq_mi_recv(struct work_struct *work)
2372 {
2373         struct pn533 *dev = container_of(work, struct pn533, mi_work);
2374
2375         struct sk_buff *skb;
2376         int rc;
2377
2378         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2379
2380         skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2381         if (!skb)
2382                 goto error;
2383
2384         switch (dev->device_type) {
2385         case PN533_DEVICE_PASORI:
2386                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2387                         rc = pn533_send_cmd_direct_async(dev,
2388                                                 PN533_CMD_IN_COMM_THRU,
2389                                                 skb,
2390                                                 pn533_data_exchange_complete,
2391                                                  dev->cmd_complete_mi_arg);
2392
2393                         break;
2394                 }
2395         default:
2396                 *skb_put(skb, sizeof(u8)) =  1; /*TG*/
2397
2398                 rc = pn533_send_cmd_direct_async(dev,
2399                                                  PN533_CMD_IN_DATA_EXCHANGE,
2400                                                  skb,
2401                                                  pn533_data_exchange_complete,
2402                                                  dev->cmd_complete_mi_arg);
2403
2404                 break;
2405         }
2406
2407         if (rc == 0) /* success */
2408                 return;
2409
2410         nfc_dev_err(&dev->interface->dev,
2411                     "Error %d when trying to perform data_exchange", rc);
2412
2413         dev_kfree_skb(skb);
2414         kfree(dev->cmd_complete_mi_arg);
2415
2416 error:
2417         pn533_send_ack(dev, GFP_KERNEL);
2418         queue_work(dev->wq, &dev->cmd_work);
2419 }
2420
2421 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2422                                                                 u8 cfgdata_len)
2423 {
2424         struct sk_buff *skb;
2425         struct sk_buff *resp;
2426
2427         int skb_len;
2428
2429         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2430
2431         skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2432
2433         skb = pn533_alloc_skb(dev, skb_len);
2434         if (!skb)
2435                 return -ENOMEM;
2436
2437         *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2438         memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
2439
2440         resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2441         if (IS_ERR(resp))
2442                 return PTR_ERR(resp);
2443
2444         dev_kfree_skb(resp);
2445         return 0;
2446 }
2447
2448 static int pn533_get_firmware_version(struct pn533 *dev,
2449                                       struct pn533_fw_version *fv)
2450 {
2451         struct sk_buff *skb;
2452         struct sk_buff *resp;
2453
2454         skb = pn533_alloc_skb(dev, 0);
2455         if (!skb)
2456                 return -ENOMEM;
2457
2458         resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2459         if (IS_ERR(resp))
2460                 return PTR_ERR(resp);
2461
2462         fv->ic = resp->data[0];
2463         fv->ver = resp->data[1];
2464         fv->rev = resp->data[2];
2465         fv->support = resp->data[3];
2466
2467         dev_kfree_skb(resp);
2468         return 0;
2469 }
2470
2471 static int pn533_pasori_fw_reset(struct pn533 *dev)
2472 {
2473         struct sk_buff *skb;
2474         struct sk_buff *resp;
2475
2476         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2477
2478         skb = pn533_alloc_skb(dev, sizeof(u8));
2479         if (!skb)
2480                 return -ENOMEM;
2481
2482         *skb_put(skb, sizeof(u8)) = 0x1;
2483
2484         resp = pn533_send_cmd_sync(dev, 0x18, skb);
2485         if (IS_ERR(resp))
2486                 return PTR_ERR(resp);
2487
2488         dev_kfree_skb(resp);
2489
2490         return 0;
2491 }
2492
2493 struct pn533_acr122_poweron_rdr_arg {
2494         int rc;
2495         struct completion done;
2496 };
2497
2498 static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
2499 {
2500         struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
2501
2502         nfc_dev_dbg(&urb->dev->dev, "%s", __func__);
2503
2504         print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
2505                        urb->transfer_buffer, urb->transfer_buffer_length,
2506                        false);
2507
2508         arg->rc = urb->status;
2509         complete(&arg->done);
2510 }
2511
2512 static int pn533_acr122_poweron_rdr(struct pn533 *dev)
2513 {
2514         /* Power on th reader (CCID cmd) */
2515         u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
2516                       0, 0, 0, 0, 0, 0, 3, 0, 0};
2517         u8 buf[255];
2518         int rc;
2519         void *cntx;
2520         struct pn533_acr122_poweron_rdr_arg arg;
2521
2522         nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2523
2524         init_completion(&arg.done);
2525         cntx = dev->in_urb->context;  /* backup context */
2526
2527         dev->in_urb->transfer_buffer = buf;
2528         dev->in_urb->transfer_buffer_length = 255;
2529         dev->in_urb->complete = pn533_acr122_poweron_rdr_resp;
2530         dev->in_urb->context = &arg;
2531
2532         dev->out_urb->transfer_buffer = cmd;
2533         dev->out_urb->transfer_buffer_length = sizeof(cmd);
2534
2535         print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
2536                        cmd, sizeof(cmd), false);
2537
2538         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
2539         if (rc) {
2540                 nfc_dev_err(&dev->interface->dev,
2541                             "Reader power on cmd error %d", rc);
2542                 return rc;
2543         }
2544
2545         rc =  usb_submit_urb(dev->in_urb, GFP_KERNEL);
2546         if (rc) {
2547                 nfc_dev_err(&dev->interface->dev,
2548                             "Can't submit for reader power on cmd response %d",
2549                             rc);
2550                 return rc;
2551         }
2552
2553         wait_for_completion(&arg.done);
2554         dev->in_urb->context = cntx; /* restore context */
2555
2556         return arg.rc;
2557 }
2558
2559 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2560 {
2561         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2562         u8 rf_field = !!rf;
2563         int rc;
2564
2565         rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2566                                      (u8 *)&rf_field, 1);
2567         if (rc) {
2568                 nfc_dev_err(&dev->interface->dev,
2569                             "Error on setting RF field");
2570                 return rc;
2571         }
2572
2573         return rc;
2574 }
2575
2576 int pn533_dev_up(struct nfc_dev *nfc_dev)
2577 {
2578         return pn533_rf_field(nfc_dev, 1);
2579 }
2580
2581 int pn533_dev_down(struct nfc_dev *nfc_dev)
2582 {
2583         return pn533_rf_field(nfc_dev, 0);
2584 }
2585
2586 static struct nfc_ops pn533_nfc_ops = {
2587         .dev_up = pn533_dev_up,
2588         .dev_down = pn533_dev_down,
2589         .dep_link_up = pn533_dep_link_up,
2590         .dep_link_down = pn533_dep_link_down,
2591         .start_poll = pn533_start_poll,
2592         .stop_poll = pn533_stop_poll,
2593         .activate_target = pn533_activate_target,
2594         .deactivate_target = pn533_deactivate_target,
2595         .im_transceive = pn533_transceive,
2596         .tm_send = pn533_tm_send,
2597 };
2598
2599 static int pn533_setup(struct pn533 *dev)
2600 {
2601         struct pn533_config_max_retries max_retries;
2602         struct pn533_config_timing timing;
2603         u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2604         int rc;
2605
2606         switch (dev->device_type) {
2607         case PN533_DEVICE_STD:
2608                 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2609                 max_retries.mx_rty_psl = 2;
2610                 max_retries.mx_rty_passive_act =
2611                         PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2612
2613                 timing.rfu = PN533_CONFIG_TIMING_102;
2614                 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2615                 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2616
2617                 break;
2618
2619         case PN533_DEVICE_PASORI:
2620         case PN533_DEVICE_ACR122U:
2621                 max_retries.mx_rty_atr = 0x2;
2622                 max_retries.mx_rty_psl = 0x1;
2623                 max_retries.mx_rty_passive_act =
2624                         PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2625
2626                 timing.rfu = PN533_CONFIG_TIMING_102;
2627                 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2628                 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2629
2630                 break;
2631
2632         default:
2633                 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2634                             dev->device_type);
2635                 return -EINVAL;
2636         }
2637
2638         rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2639                                      (u8 *)&max_retries, sizeof(max_retries));
2640         if (rc) {
2641                 nfc_dev_err(&dev->interface->dev,
2642                             "Error on setting MAX_RETRIES config");
2643                 return rc;
2644         }
2645
2646
2647         rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2648                                      (u8 *)&timing, sizeof(timing));
2649         if (rc) {
2650                 nfc_dev_err(&dev->interface->dev,
2651                             "Error on setting RF timings");
2652                 return rc;
2653         }
2654
2655         switch (dev->device_type) {
2656         case PN533_DEVICE_STD:
2657                 break;
2658
2659         case PN533_DEVICE_PASORI:
2660                 pn533_pasori_fw_reset(dev);
2661
2662                 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2663                                              pasori_cfg, 3);
2664                 if (rc) {
2665                         nfc_dev_err(&dev->interface->dev,
2666                                     "Error while settings PASORI config");
2667                         return rc;
2668                 }
2669
2670                 pn533_pasori_fw_reset(dev);
2671
2672                 break;
2673         }
2674
2675         return 0;
2676 }
2677
2678 static int pn533_probe(struct usb_interface *interface,
2679                         const struct usb_device_id *id)
2680 {
2681         struct pn533_fw_version fw_ver;
2682         struct pn533 *dev;
2683         struct usb_host_interface *iface_desc;
2684         struct usb_endpoint_descriptor *endpoint;
2685         int in_endpoint = 0;
2686         int out_endpoint = 0;
2687         int rc = -ENOMEM;
2688         int i;
2689         u32 protocols;
2690
2691         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2692         if (!dev)
2693                 return -ENOMEM;
2694
2695         dev->udev = usb_get_dev(interface_to_usbdev(interface));
2696         dev->interface = interface;
2697         mutex_init(&dev->cmd_lock);
2698
2699         iface_desc = interface->cur_altsetting;
2700         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2701                 endpoint = &iface_desc->endpoint[i].desc;
2702
2703                 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
2704                         in_endpoint = endpoint->bEndpointAddress;
2705
2706                 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
2707                         out_endpoint = endpoint->bEndpointAddress;
2708         }
2709
2710         if (!in_endpoint || !out_endpoint) {
2711                 nfc_dev_err(&interface->dev,
2712                             "Could not find bulk-in or bulk-out endpoint");
2713                 rc = -ENODEV;
2714                 goto error;
2715         }
2716
2717         dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
2718         dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2719
2720         if (!dev->in_urb || !dev->out_urb)
2721                 goto error;
2722
2723         usb_fill_bulk_urb(dev->in_urb, dev->udev,
2724                           usb_rcvbulkpipe(dev->udev, in_endpoint),
2725                           NULL, 0, NULL, dev);
2726         usb_fill_bulk_urb(dev->out_urb, dev->udev,
2727                           usb_sndbulkpipe(dev->udev, out_endpoint),
2728                           NULL, 0, pn533_send_complete, dev);
2729
2730         INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2731         INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
2732         INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
2733         INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
2734         INIT_WORK(&dev->poll_work, pn533_wq_poll);
2735         dev->wq = alloc_ordered_workqueue("pn533", 0);
2736         if (dev->wq == NULL)
2737                 goto error;
2738
2739         init_timer(&dev->listen_timer);
2740         dev->listen_timer.data = (unsigned long) dev;
2741         dev->listen_timer.function = pn533_listen_mode_timer;
2742
2743         skb_queue_head_init(&dev->resp_q);
2744
2745         INIT_LIST_HEAD(&dev->cmd_queue);
2746
2747         usb_set_intfdata(interface, dev);
2748
2749         dev->ops = &pn533_std_frame_ops;
2750
2751         dev->protocol_type = PN533_PROTO_REQ_ACK_RESP;
2752         dev->device_type = id->driver_info;
2753         switch (dev->device_type) {
2754         case PN533_DEVICE_STD:
2755                 protocols = PN533_ALL_PROTOCOLS;
2756                 break;
2757
2758         case PN533_DEVICE_PASORI:
2759                 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2760                 break;
2761
2762         case PN533_DEVICE_ACR122U:
2763                 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2764                 dev->ops = &pn533_acr122_frame_ops;
2765                 dev->protocol_type = PN533_PROTO_REQ_RESP,
2766
2767                 rc = pn533_acr122_poweron_rdr(dev);
2768                 if (rc < 0) {
2769                         nfc_dev_err(&dev->interface->dev,
2770                                     "Couldn't poweron the reader (error %d)",
2771                                     rc);
2772                         goto destroy_wq;
2773                 }
2774                 break;
2775
2776         default:
2777                 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2778                             dev->device_type);
2779                 rc = -EINVAL;
2780                 goto destroy_wq;
2781         }
2782
2783         memset(&fw_ver, 0, sizeof(fw_ver));
2784         rc = pn533_get_firmware_version(dev, &fw_ver);
2785         if (rc < 0)
2786                 goto destroy_wq;
2787
2788         nfc_dev_info(&dev->interface->dev,
2789                      "NXP PN5%02X firmware ver %d.%d now attached",
2790                      fw_ver.ic, fw_ver.ver, fw_ver.rev);
2791
2792
2793         dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2794                                            dev->ops->tx_header_len +
2795                                            PN533_CMD_DATAEXCH_HEAD_LEN,
2796                                            dev->ops->tx_tail_len);
2797         if (!dev->nfc_dev) {
2798                 rc = -ENOMEM;
2799                 goto destroy_wq;
2800         }
2801
2802         nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2803         nfc_set_drvdata(dev->nfc_dev, dev);
2804
2805         rc = nfc_register_device(dev->nfc_dev);
2806         if (rc)
2807                 goto free_nfc_dev;
2808
2809         rc = pn533_setup(dev);
2810         if (rc)
2811                 goto unregister_nfc_dev;
2812
2813         return 0;
2814
2815 unregister_nfc_dev:
2816         nfc_unregister_device(dev->nfc_dev);
2817
2818 free_nfc_dev:
2819         nfc_free_device(dev->nfc_dev);
2820
2821 destroy_wq:
2822         destroy_workqueue(dev->wq);
2823 error:
2824         usb_free_urb(dev->in_urb);
2825         usb_free_urb(dev->out_urb);
2826         usb_put_dev(dev->udev);
2827         kfree(dev);
2828         return rc;
2829 }
2830
2831 static void pn533_disconnect(struct usb_interface *interface)
2832 {
2833         struct pn533 *dev;
2834         struct pn533_cmd *cmd, *n;
2835
2836         dev = usb_get_intfdata(interface);
2837         usb_set_intfdata(interface, NULL);
2838
2839         nfc_unregister_device(dev->nfc_dev);
2840         nfc_free_device(dev->nfc_dev);
2841
2842         usb_kill_urb(dev->in_urb);
2843         usb_kill_urb(dev->out_urb);
2844
2845         destroy_workqueue(dev->wq);
2846
2847         skb_queue_purge(&dev->resp_q);
2848
2849         del_timer(&dev->listen_timer);
2850
2851         list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2852                 list_del(&cmd->queue);
2853                 kfree(cmd);
2854         }
2855
2856         usb_free_urb(dev->in_urb);
2857         usb_free_urb(dev->out_urb);
2858         kfree(dev);
2859
2860         nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
2861 }
2862
2863 static struct usb_driver pn533_driver = {
2864         .name =         "pn533",
2865         .probe =        pn533_probe,
2866         .disconnect =   pn533_disconnect,
2867         .id_table =     pn533_table,
2868 };
2869
2870 module_usb_driver(pn533_driver);
2871
2872 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2873 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2874 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2875 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2876 MODULE_VERSION(VERSION);
2877 MODULE_LICENSE("GPL");