drivers/nfc/pn533/pn533.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Driver for NXP PN533 NFC Chip - core functions
   4  *
   5  * Copyright (C) 2011 Instituto Nokia de Tecnologia
   6  * Copyright (C) 2012-2013 Tieto Poland
   7  */
   8
   9 #include <linux/device.h>
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/slab.h>
  13 #include <linux/nfc.h>
  14 #include <linux/netdevice.h>
  15 #include <net/nfc/nfc.h>
  16 #include "pn533.h"
  17
  18 #define VERSION "0.3"
  19
  20 /* How much time we spend listening for initiators */
  21 #define PN533_LISTEN_TIME 2
  22 /* Delay between each poll frame (ms) */
  23 #define PN533_POLL_INTERVAL 10
  24
  25 /* structs for pn533 commands */
  26
  27 /* PN533_CMD_GET_FIRMWARE_VERSION */
  28 struct pn533_fw_version {
  29         u8 ic;
  30         u8 ver;
  31         u8 rev;
  32         u8 support;
  33 };
  34
  35 /* PN533_CMD_RF_CONFIGURATION */
  36 #define PN533_CFGITEM_RF_FIELD    0x01
  37 #define PN533_CFGITEM_TIMING      0x02
  38 #define PN533_CFGITEM_MAX_RETRIES 0x05
  39 #define PN533_CFGITEM_PASORI      0x82
  40
  41 #define PN533_CFGITEM_RF_FIELD_AUTO_RFCA 0x2
  42 #define PN533_CFGITEM_RF_FIELD_ON        0x1
  43 #define PN533_CFGITEM_RF_FIELD_OFF       0x0
  44
  45 #define PN533_CONFIG_TIMING_102 0xb
  46 #define PN533_CONFIG_TIMING_204 0xc
  47 #define PN533_CONFIG_TIMING_409 0xd
  48 #define PN533_CONFIG_TIMING_819 0xe
  49
  50 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
  51 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
  52
  53 struct pn533_config_max_retries {
  54         u8 mx_rty_atr;
  55         u8 mx_rty_psl;
  56         u8 mx_rty_passive_act;
  57 } __packed;
  58
  59 struct pn533_config_timing {
  60         u8 rfu;
  61         u8 atr_res_timeout;
  62         u8 dep_timeout;
  63 } __packed;
  64
  65 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
  66
  67 /* felica commands opcode */
  68 #define PN533_FELICA_OPC_SENSF_REQ 0
  69 #define PN533_FELICA_OPC_SENSF_RES 1
  70 /* felica SENSF_REQ parameters */
  71 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
  72 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
  73 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
  74 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
  75
  76 /* type B initiator_data values */
  77 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
  78 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
  79 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
  80
  81 union pn533_cmd_poll_initdata {
  82         struct {
  83                 u8 afi;
  84                 u8 polling_method;
  85         } __packed type_b;
  86         struct {
  87                 u8 opcode;
  88                 __be16 sc;
  89                 u8 rc;
  90                 u8 tsn;
  91         } __packed felica;
  92 };
  93
  94 struct pn533_poll_modulations {
  95         struct {
  96                 u8 maxtg;
  97                 u8 brty;
  98                 union pn533_cmd_poll_initdata initiator_data;
  99         } __packed data;
 100         u8 len;
 101 };
 102
 103 static const struct pn533_poll_modulations poll_mod[] = {
 104         [PN533_POLL_MOD_106KBPS_A] = {
 105                 .data = {
 106                         .maxtg = 1,
 107                         .brty = 0,
 108                 },
 109                 .len = 2,
 110         },
 111         [PN533_POLL_MOD_212KBPS_FELICA] = {
 112                 .data = {
 113                         .maxtg = 1,
 114                         .brty = 1,
 115                         .initiator_data.felica = {
 116                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 117                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 118                                 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
 119                                 .tsn = 0x03,
 120                         },
 121                 },
 122                 .len = 7,
 123         },
 124         [PN533_POLL_MOD_424KBPS_FELICA] = {
 125                 .data = {
 126                         .maxtg = 1,
 127                         .brty = 2,
 128                         .initiator_data.felica = {
 129                                 .opcode = PN533_FELICA_OPC_SENSF_REQ,
 130                                 .sc = PN533_FELICA_SENSF_SC_ALL,
 131                                 .rc = PN533_FELICA_SENSF_RC_SYSTEM_CODE,
 132                                 .tsn = 0x03,
 133                         },
 134                  },
 135                 .len = 7,
 136         },
 137         [PN533_POLL_MOD_106KBPS_JEWEL] = {
 138                 .data = {
 139                         .maxtg = 1,
 140                         .brty = 4,
 141                 },
 142                 .len = 2,
 143         },
 144         [PN533_POLL_MOD_847KBPS_B] = {
 145                 .data = {
 146                         .maxtg = 1,
 147                         .brty = 8,
 148                         .initiator_data.type_b = {
 149                                 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
 150                                 .polling_method =
 151                                         PN533_TYPE_B_POLL_METHOD_TIMESLOT,
 152                         },
 153                 },
 154                 .len = 3,
 155         },
 156         [PN533_LISTEN_MOD] = {
 157                 .len = 0,
 158         },
 159 };
 160
 161 /* PN533_CMD_IN_ATR */
 162
 163 struct pn533_cmd_activate_response {
 164         u8 status;
 165         u8 nfcid3t[10];
 166         u8 didt;
 167         u8 bst;
 168         u8 brt;
 169         u8 to;
 170         u8 ppt;
 171         /* optional */
 172         u8 gt[];
 173 } __packed;
 174
 175 struct pn533_cmd_jump_dep_response {
 176         u8 status;
 177         u8 tg;
 178         u8 nfcid3t[10];
 179         u8 didt;
 180         u8 bst;
 181         u8 brt;
 182         u8 to;
 183         u8 ppt;
 184         /* optional */
 185         u8 gt[];
 186 } __packed;
 187
 188 struct pn532_autopoll_resp {
 189         u8 type;
 190         u8 ln;
 191         u8 tg;
 192         u8 tgdata[];
 193 };
 194
 195 /* PN532_CMD_IN_AUTOPOLL */
 196 #define PN532_AUTOPOLL_POLLNR_INFINITE  0xff
 197 #define PN532_AUTOPOLL_PERIOD           0x03 /* in units of 150 ms */
 198
 199 #define PN532_AUTOPOLL_TYPE_GENERIC_106         0x00
 200 #define PN532_AUTOPOLL_TYPE_GENERIC_212         0x01
 201 #define PN532_AUTOPOLL_TYPE_GENERIC_424         0x02
 202 #define PN532_AUTOPOLL_TYPE_JEWEL               0x04
 203 #define PN532_AUTOPOLL_TYPE_MIFARE              0x10
 204 #define PN532_AUTOPOLL_TYPE_FELICA212           0x11
 205 #define PN532_AUTOPOLL_TYPE_FELICA424           0x12
 206 #define PN532_AUTOPOLL_TYPE_ISOA                0x20
 207 #define PN532_AUTOPOLL_TYPE_ISOB                0x23
 208 #define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106     0x40
 209 #define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212     0x41
 210 #define PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424     0x42
 211 #define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106      0x80
 212 #define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_212      0x81
 213 #define PN532_AUTOPOLL_TYPE_DEP_ACTIVE_424      0x82
 214
 215 /* PN533_TG_INIT_AS_TARGET */
 216 #define PN533_INIT_TARGET_PASSIVE 0x1
 217 #define PN533_INIT_TARGET_DEP 0x2
 218
 219 #define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
 220 #define PN533_INIT_TARGET_RESP_ACTIVE     0x1
 221 #define PN533_INIT_TARGET_RESP_DEP        0x4
 222
 223 /* The rule: value(high byte) + value(low byte) + checksum = 0 */
 224 static inline u8 pn533_ext_checksum(u16 value)
 225 {
 226         return ~(u8)(((value & 0xFF00) >> 8) + (u8)(value & 0xFF)) + 1;
 227 }
 228
 229 /* The rule: value + checksum = 0 */
 230 static inline u8 pn533_std_checksum(u8 value)
 231 {
 232         return ~value + 1;
 233 }
 234
 235 /* The rule: sum(data elements) + checksum = 0 */
 236 static u8 pn533_std_data_checksum(u8 *data, int datalen)
 237 {
 238         u8 sum = 0;
 239         int i;
 240
 241         for (i = 0; i < datalen; i++)
 242                 sum += data[i];
 243
 244         return pn533_std_checksum(sum);
 245 }
 246
 247 static void pn533_std_tx_frame_init(void *_frame, u8 cmd_code)
 248 {
 249         struct pn533_std_frame *frame = _frame;
 250
 251         frame->preamble = 0;
 252         frame->start_frame = cpu_to_be16(PN533_STD_FRAME_SOF);
 253         PN533_STD_FRAME_IDENTIFIER(frame) = PN533_STD_FRAME_DIR_OUT;
 254         PN533_FRAME_CMD(frame) = cmd_code;
 255         frame->datalen = 2;
 256 }
 257
 258 static void pn533_std_tx_frame_finish(void *_frame)
 259 {
 260         struct pn533_std_frame *frame = _frame;
 261
 262         frame->datalen_checksum = pn533_std_checksum(frame->datalen);
 263
 264         PN533_STD_FRAME_CHECKSUM(frame) =
 265                 pn533_std_data_checksum(frame->data, frame->datalen);
 266
 267         PN533_STD_FRAME_POSTAMBLE(frame) = 0;
 268 }
 269
 270 static void pn533_std_tx_update_payload_len(void *_frame, int len)
 271 {
 272         struct pn533_std_frame *frame = _frame;
 273
 274         frame->datalen += len;
 275 }
 276
 277 static bool pn533_std_rx_frame_is_valid(void *_frame, struct pn533 *dev)
 278 {
 279         u8 checksum;
 280         struct pn533_std_frame *stdf = _frame;
 281
 282         if (stdf->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
 283                 return false;
 284
 285         if (likely(!PN533_STD_IS_EXTENDED(stdf))) {
 286                 /* Standard frame code */
 287                 dev->ops->rx_header_len = PN533_STD_FRAME_HEADER_LEN;
 288
 289                 checksum = pn533_std_checksum(stdf->datalen);
 290                 if (checksum != stdf->datalen_checksum)
 291                         return false;
 292
 293                 checksum = pn533_std_data_checksum(stdf->data, stdf->datalen);
 294                 if (checksum != PN533_STD_FRAME_CHECKSUM(stdf))
 295                         return false;
 296         } else {
 297                 /* Extended */
 298                 struct pn533_ext_frame *eif = _frame;
 299
 300                 dev->ops->rx_header_len = PN533_EXT_FRAME_HEADER_LEN;
 301
 302                 checksum = pn533_ext_checksum(be16_to_cpu(eif->datalen));
 303                 if (checksum != eif->datalen_checksum)
 304                         return false;
 305
 306                 /* check data checksum */
 307                 checksum = pn533_std_data_checksum(eif->data,
 308                                                    be16_to_cpu(eif->datalen));
 309                 if (checksum != PN533_EXT_FRAME_CHECKSUM(eif))
 310                         return false;
 311         }
 312
 313         return true;
 314 }
 315
 316 bool pn533_rx_frame_is_ack(void *_frame)
 317 {
 318         struct pn533_std_frame *frame = _frame;
 319
 320         if (frame->start_frame != cpu_to_be16(PN533_STD_FRAME_SOF))
 321                 return false;
 322
 323         if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
 324                 return false;
 325
 326         return true;
 327 }
 328 EXPORT_SYMBOL_GPL(pn533_rx_frame_is_ack);
 329
 330 static inline int pn533_std_rx_frame_size(void *frame)
 331 {
 332         struct pn533_std_frame *f = frame;
 333
 334         /* check for Extended Information frame */
 335         if (PN533_STD_IS_EXTENDED(f)) {
 336                 struct pn533_ext_frame *eif = frame;
 337
 338                 return sizeof(struct pn533_ext_frame)
 339                         + be16_to_cpu(eif->datalen) + PN533_STD_FRAME_TAIL_LEN;
 340         }
 341
 342         return sizeof(struct pn533_std_frame) + f->datalen +
 343                PN533_STD_FRAME_TAIL_LEN;
 344 }
 345
 346 static u8 pn533_std_get_cmd_code(void *frame)
 347 {
 348         struct pn533_std_frame *f = frame;
 349         struct pn533_ext_frame *eif = frame;
 350
 351         if (PN533_STD_IS_EXTENDED(f))
 352                 return PN533_FRAME_CMD(eif);
 353         else
 354                 return PN533_FRAME_CMD(f);
 355 }
 356
 357 bool pn533_rx_frame_is_cmd_response(struct pn533 *dev, void *frame)
 358 {
 359         return (dev->ops->get_cmd_code(frame) ==
 360                                 PN533_CMD_RESPONSE(dev->cmd->code));
 361 }
 362 EXPORT_SYMBOL_GPL(pn533_rx_frame_is_cmd_response);
 363
 364
 365 static struct pn533_frame_ops pn533_std_frame_ops = {
 366         .tx_frame_init = pn533_std_tx_frame_init,
 367         .tx_frame_finish = pn533_std_tx_frame_finish,
 368         .tx_update_payload_len = pn533_std_tx_update_payload_len,
 369         .tx_header_len = PN533_STD_FRAME_HEADER_LEN,
 370         .tx_tail_len = PN533_STD_FRAME_TAIL_LEN,
 371
 372         .rx_is_frame_valid = pn533_std_rx_frame_is_valid,
 373         .rx_frame_size = pn533_std_rx_frame_size,
 374         .rx_header_len = PN533_STD_FRAME_HEADER_LEN,
 375         .rx_tail_len = PN533_STD_FRAME_TAIL_LEN,
 376
 377         .max_payload_len =  PN533_STD_FRAME_MAX_PAYLOAD_LEN,
 378         .get_cmd_code = pn533_std_get_cmd_code,
 379 };
 380
 381 static void pn533_build_cmd_frame(struct pn533 *dev, u8 cmd_code,
 382                                   struct sk_buff *skb)
 383 {
 384         /* payload is already there, just update datalen */
 385         int payload_len = skb->len;
 386         struct pn533_frame_ops *ops = dev->ops;
 387
 388
 389         skb_push(skb, ops->tx_header_len);
 390         skb_put(skb, ops->tx_tail_len);
 391
 392         ops->tx_frame_init(skb->data, cmd_code);
 393         ops->tx_update_payload_len(skb->data, payload_len);
 394         ops->tx_frame_finish(skb->data);
 395 }
 396
 397 static int pn533_send_async_complete(struct pn533 *dev)
 398 {
 399         struct pn533_cmd *cmd = dev->cmd;
 400         struct sk_buff *resp;
 401         int status, rc = 0;
 402
 403         if (!cmd) {
 404                 dev_dbg(dev->dev, "%s: cmd not set\n", __func__);
 405                 goto done;
 406         }
 407
 408         dev_kfree_skb(cmd->req);
 409
 410         status = cmd->status;
 411         resp = cmd->resp;
 412
 413         if (status < 0) {
 414                 rc = cmd->complete_cb(dev, cmd->complete_cb_context,
 415                                       ERR_PTR(status));
 416                 dev_kfree_skb(resp);
 417                 goto done;
 418         }
 419
 420         /* when no response is set we got interrupted */
 421         if (!resp)
 422                 resp = ERR_PTR(-EINTR);
 423
 424         if (!IS_ERR(resp)) {
 425                 skb_pull(resp, dev->ops->rx_header_len);
 426                 skb_trim(resp, resp->len - dev->ops->rx_tail_len);
 427         }
 428
 429         rc = cmd->complete_cb(dev, cmd->complete_cb_context, resp);
 430
 431 done:
 432         kfree(cmd);
 433         dev->cmd = NULL;
 434         return rc;
 435 }
 436
 437 static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
 438                               struct sk_buff *req,
 439                               pn533_send_async_complete_t complete_cb,
 440                               void *complete_cb_context)
 441 {
 442         struct pn533_cmd *cmd;
 443         int rc = 0;
 444
 445         dev_dbg(dev->dev, "Sending command 0x%x\n", cmd_code);
 446
 447         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 448         if (!cmd)
 449                 return -ENOMEM;
 450
 451         cmd->code = cmd_code;
 452         cmd->req = req;
 453         cmd->complete_cb = complete_cb;
 454         cmd->complete_cb_context = complete_cb_context;
 455
 456         pn533_build_cmd_frame(dev, cmd_code, req);
 457
 458         mutex_lock(&dev->cmd_lock);
 459
 460         if (!dev->cmd_pending) {
 461                 dev->cmd = cmd;
 462                 rc = dev->phy_ops->send_frame(dev, req);
 463                 if (rc) {
 464                         dev->cmd = NULL;
 465                         goto error;
 466                 }
 467
 468                 dev->cmd_pending = 1;
 469                 goto unlock;
 470         }
 471
 472         dev_dbg(dev->dev, "%s Queueing command 0x%x\n",
 473                 __func__, cmd_code);
 474
 475         INIT_LIST_HEAD(&cmd->queue);
 476         list_add_tail(&cmd->queue, &dev->cmd_queue);
 477
 478         goto unlock;
 479
 480 error:
 481         kfree(cmd);
 482 unlock:
 483         mutex_unlock(&dev->cmd_lock);
 484         return rc;
 485 }
 486
 487 static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
 488                                  struct sk_buff *req,
 489                                  pn533_send_async_complete_t complete_cb,
 490                                  void *complete_cb_context)
 491 {
 492         int rc;
 493
 494         rc = __pn533_send_async(dev, cmd_code, req, complete_cb,
 495                                 complete_cb_context);
 496
 497         return rc;
 498 }
 499
 500 static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
 501                                 struct sk_buff *req,
 502                                 pn533_send_async_complete_t complete_cb,
 503                                 void *complete_cb_context)
 504 {
 505         int rc;
 506
 507         rc = __pn533_send_async(dev, cmd_code, req, complete_cb,
 508                                 complete_cb_context);
 509
 510         return rc;
 511 }
 512
 513 /*
 514  * pn533_send_cmd_direct_async
 515  *
 516  * The function sends a piority cmd directly to the chip omitting the cmd
 517  * queue. It's intended to be used by chaining mechanism of received responses
 518  * where the host has to request every single chunk of data before scheduling
 519  * next cmd from the queue.
 520  */
 521 static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
 522                                        struct sk_buff *req,
 523                                        pn533_send_async_complete_t complete_cb,
 524                                        void *complete_cb_context)
 525 {
 526         struct pn533_cmd *cmd;
 527         int rc;
 528
 529         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 530         if (!cmd)
 531                 return -ENOMEM;
 532
 533         cmd->code = cmd_code;
 534         cmd->req = req;
 535         cmd->complete_cb = complete_cb;
 536         cmd->complete_cb_context = complete_cb_context;
 537
 538         pn533_build_cmd_frame(dev, cmd_code, req);
 539
 540         dev->cmd = cmd;
 541         rc = dev->phy_ops->send_frame(dev, req);
 542         if (rc < 0) {
 543                 dev->cmd = NULL;
 544                 kfree(cmd);
 545         }
 546
 547         return rc;
 548 }
 549
 550 static void pn533_wq_cmd_complete(struct work_struct *work)
 551 {
 552         struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
 553         int rc;
 554
 555         rc = pn533_send_async_complete(dev);
 556         if (rc != -EINPROGRESS)
 557                 queue_work(dev->wq, &dev->cmd_work);
 558 }
 559
 560 static void pn533_wq_cmd(struct work_struct *work)
 561 {
 562         struct pn533 *dev = container_of(work, struct pn533, cmd_work);
 563         struct pn533_cmd *cmd;
 564         int rc;
 565
 566         mutex_lock(&dev->cmd_lock);
 567
 568         if (list_empty(&dev->cmd_queue)) {
 569                 dev->cmd_pending = 0;
 570                 mutex_unlock(&dev->cmd_lock);
 571                 return;
 572         }
 573
 574         cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
 575
 576         list_del(&cmd->queue);
 577
 578         mutex_unlock(&dev->cmd_lock);
 579
 580         dev->cmd = cmd;
 581         rc = dev->phy_ops->send_frame(dev, cmd->req);
 582         if (rc < 0) {
 583                 dev->cmd = NULL;
 584                 dev_kfree_skb(cmd->req);
 585                 kfree(cmd);
 586                 return;
 587         }
 588
 589 }
 590
 591 struct pn533_sync_cmd_response {
 592         struct sk_buff *resp;
 593         struct completion done;
 594 };
 595
 596 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
 597                                     struct sk_buff *resp)
 598 {
 599         struct pn533_sync_cmd_response *arg = _arg;
 600
 601         arg->resp = resp;
 602         complete(&arg->done);
 603
 604         return 0;
 605 }
 606
 607 /*  pn533_send_cmd_sync
 608  *
 609  *  Please note the req parameter is freed inside the function to
 610  *  limit a number of return value interpretations by the caller.
 611  *
 612  *  1. negative in case of error during TX path -> req should be freed
 613  *
 614  *  2. negative in case of error during RX path -> req should not be freed
 615  *     as it's been already freed at the beginning of RX path by
 616  *     async_complete_cb.
 617  *
 618  *  3. valid pointer in case of succesfult RX path
 619  *
 620  *  A caller has to check a return value with IS_ERR macro. If the test pass,
 621  *  the returned pointer is valid.
 622  *
 623  */
 624 static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
 625                                                struct sk_buff *req)
 626 {
 627         int rc;
 628         struct pn533_sync_cmd_response arg;
 629
 630         init_completion(&arg.done);
 631
 632         rc = pn533_send_cmd_async(dev, cmd_code, req,
 633                                   pn533_send_sync_complete, &arg);
 634         if (rc) {
 635                 dev_kfree_skb(req);
 636                 return ERR_PTR(rc);
 637         }
 638
 639         wait_for_completion(&arg.done);
 640
 641         return arg.resp;
 642 }
 643
 644 static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
 645 {
 646         struct sk_buff *skb;
 647
 648         skb = alloc_skb(dev->ops->tx_header_len +
 649                         size +
 650                         dev->ops->tx_tail_len, GFP_KERNEL);
 651
 652         if (skb)
 653                 skb_reserve(skb, dev->ops->tx_header_len);
 654
 655         return skb;
 656 }
 657
 658 struct pn533_target_type_a {
 659         __be16 sens_res;
 660         u8 sel_res;
 661         u8 nfcid_len;
 662         u8 nfcid_data[];
 663 } __packed;
 664
 665
 666 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
 667 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
 668 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
 669
 670 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
 671 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
 672
 673 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
 674 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
 675
 676 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
 677 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
 678 #define PN533_TYPE_A_SEL_PROT_DEP 2
 679 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
 680
 681 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
 682                                                         int target_data_len)
 683 {
 684         u8 ssd;
 685         u8 platconf;
 686
 687         if (target_data_len < sizeof(struct pn533_target_type_a))
 688                 return false;
 689
 690         /*
 691          * The length check of nfcid[] and ats[] are not being performed because
 692          * the values are not being used
 693          */
 694
 695         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
 696         ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
 697         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
 698
 699         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 700              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
 701             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 702              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
 703                 return false;
 704
 705         /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
 706         if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
 707                 return false;
 708
 709         if (type_a->nfcid_len > NFC_NFCID1_MAXSIZE)
 710                 return false;
 711
 712         return true;
 713 }
 714
 715 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
 716                                                         int tgt_data_len)
 717 {
 718         struct pn533_target_type_a *tgt_type_a;
 719
 720         tgt_type_a = (struct pn533_target_type_a *)tgt_data;
 721
 722         if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
 723                 return -EPROTO;
 724
 725         switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
 726         case PN533_TYPE_A_SEL_PROT_MIFARE:
 727                 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
 728                 break;
 729         case PN533_TYPE_A_SEL_PROT_ISO14443:
 730                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
 731                 break;
 732         case PN533_TYPE_A_SEL_PROT_DEP:
 733                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
 734                 break;
 735         case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
 736                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
 737                                                         NFC_PROTO_NFC_DEP_MASK;
 738                 break;
 739         }
 740
 741         nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
 742         nfc_tgt->sel_res = tgt_type_a->sel_res;
 743         nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
 744         memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
 745
 746         return 0;
 747 }
 748
 749 struct pn533_target_felica {
 750         u8 pol_res;
 751         u8 opcode;
 752         u8 nfcid2[NFC_NFCID2_MAXSIZE];
 753         u8 pad[8];
 754         /* optional */
 755         u8 syst_code[];
 756 } __packed;
 757
 758 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
 759 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
 760
 761 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
 762                                                         int target_data_len)
 763 {
 764         if (target_data_len < sizeof(struct pn533_target_felica))
 765                 return false;
 766
 767         if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
 768                 return false;
 769
 770         return true;
 771 }
 772
 773 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
 774                                                         int tgt_data_len)
 775 {
 776         struct pn533_target_felica *tgt_felica;
 777
 778         tgt_felica = (struct pn533_target_felica *)tgt_data;
 779
 780         if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
 781                 return -EPROTO;
 782
 783         if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
 784             (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
 785                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
 786         else
 787                 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
 788
 789         memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
 790         nfc_tgt->sensf_res_len = 9;
 791
 792         memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
 793         nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
 794
 795         return 0;
 796 }
 797
 798 struct pn533_target_jewel {
 799         __be16 sens_res;
 800         u8 jewelid[4];
 801 } __packed;
 802
 803 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
 804                                                         int target_data_len)
 805 {
 806         u8 ssd;
 807         u8 platconf;
 808
 809         if (target_data_len < sizeof(struct pn533_target_jewel))
 810                 return false;
 811
 812         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
 813         ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
 814         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
 815
 816         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 817              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
 818             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 819              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
 820                 return false;
 821
 822         return true;
 823 }
 824
 825 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
 826                                                         int tgt_data_len)
 827 {
 828         struct pn533_target_jewel *tgt_jewel;
 829
 830         tgt_jewel = (struct pn533_target_jewel *)tgt_data;
 831
 832         if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
 833                 return -EPROTO;
 834
 835         nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
 836         nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
 837         nfc_tgt->nfcid1_len = 4;
 838         memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
 839
 840         return 0;
 841 }
 842
 843 struct pn533_type_b_prot_info {
 844         u8 bitrate;
 845         u8 fsci_type;
 846         u8 fwi_adc_fo;
 847 } __packed;
 848
 849 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
 850 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
 851 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
 852
 853 struct pn533_type_b_sens_res {
 854         u8 opcode;
 855         u8 nfcid[4];
 856         u8 appdata[4];
 857         struct pn533_type_b_prot_info prot_info;
 858 } __packed;
 859
 860 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
 861
 862 struct pn533_target_type_b {
 863         struct pn533_type_b_sens_res sensb_res;
 864         u8 attrib_res_len;
 865         u8 attrib_res[];
 866 } __packed;
 867
 868 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
 869                                                         int target_data_len)
 870 {
 871         if (target_data_len < sizeof(struct pn533_target_type_b))
 872                 return false;
 873
 874         if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
 875                 return false;
 876
 877         if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
 878                                                 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
 879                 return false;
 880
 881         return true;
 882 }
 883
 884 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
 885                                                         int tgt_data_len)
 886 {
 887         struct pn533_target_type_b *tgt_type_b;
 888
 889         tgt_type_b = (struct pn533_target_type_b *)tgt_data;
 890
 891         if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
 892                 return -EPROTO;
 893
 894         nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
 895
 896         return 0;
 897 }
 898
 899 static void pn533_poll_reset_mod_list(struct pn533 *dev);
 900 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
 901                               int tgdata_len)
 902 {
 903         struct nfc_target nfc_tgt;
 904         int rc;
 905
 906         dev_dbg(dev->dev, "%s: modulation=%d\n",
 907                 __func__, dev->poll_mod_curr);
 908
 909         if (tg != 1)
 910                 return -EPROTO;
 911
 912         memset(&nfc_tgt, 0, sizeof(struct nfc_target));
 913
 914         switch (dev->poll_mod_curr) {
 915         case PN533_POLL_MOD_106KBPS_A:
 916                 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
 917                 break;
 918         case PN533_POLL_MOD_212KBPS_FELICA:
 919         case PN533_POLL_MOD_424KBPS_FELICA:
 920                 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
 921                 break;
 922         case PN533_POLL_MOD_106KBPS_JEWEL:
 923                 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
 924                 break;
 925         case PN533_POLL_MOD_847KBPS_B:
 926                 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
 927                 break;
 928         default:
 929                 nfc_err(dev->dev,
 930                         "Unknown current poll modulation\n");
 931                 return -EPROTO;
 932         }
 933
 934         if (rc)
 935                 return rc;
 936
 937         if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
 938                 dev_dbg(dev->dev,
 939                         "The Tg found doesn't have the desired protocol\n");
 940                 return -EAGAIN;
 941         }
 942
 943         dev_dbg(dev->dev,
 944                 "Target found - supported protocols: 0x%x\n",
 945                 nfc_tgt.supported_protocols);
 946
 947         dev->tgt_available_prots = nfc_tgt.supported_protocols;
 948
 949         pn533_poll_reset_mod_list(dev);
 950         nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
 951
 952         return 0;
 953 }
 954
 955 static inline void pn533_poll_next_mod(struct pn533 *dev)
 956 {
 957         dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
 958 }
 959
 960 static void pn533_poll_reset_mod_list(struct pn533 *dev)
 961 {
 962         dev->poll_mod_count = 0;
 963 }
 964
 965 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
 966 {
 967         dev->poll_mod_active[dev->poll_mod_count] =
 968                 (struct pn533_poll_modulations *)&poll_mod[mod_index];
 969         dev->poll_mod_count++;
 970 }
 971
 972 static void pn533_poll_create_mod_list(struct pn533 *dev,
 973                                        u32 im_protocols, u32 tm_protocols)
 974 {
 975         pn533_poll_reset_mod_list(dev);
 976
 977         if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
 978             (im_protocols & NFC_PROTO_ISO14443_MASK) ||
 979             (im_protocols & NFC_PROTO_NFC_DEP_MASK))
 980                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
 981
 982         if (im_protocols & NFC_PROTO_FELICA_MASK ||
 983             im_protocols & NFC_PROTO_NFC_DEP_MASK) {
 984                 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
 985                 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
 986         }
 987
 988         if (im_protocols & NFC_PROTO_JEWEL_MASK)
 989                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
 990
 991         if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
 992                 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
 993
 994         if (tm_protocols)
 995                 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
 996 }
 997
 998 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
 999 {
1000         u8 nbtg, tg, *tgdata;
1001         int rc, tgdata_len;
1002
1003         /* Toggle the DEP polling */
1004         if (dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK)
1005                 dev->poll_dep = 1;
1006
1007         nbtg = resp->data[0];
1008         tg = resp->data[1];
1009         tgdata = &resp->data[2];
1010         tgdata_len = resp->len - 2;  /* nbtg + tg */
1011
1012         if (nbtg) {
1013                 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1014
1015                 /* We must stop the poll after a valid target found */
1016                 if (rc == 0)
1017                         return 0;
1018         }
1019
1020         return -EAGAIN;
1021 }
1022
1023 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1024 {
1025         struct sk_buff *skb;
1026         u8 *felica, *nfcid3;
1027
1028         u8 *gbytes = dev->gb;
1029         size_t gbytes_len = dev->gb_len;
1030
1031         u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1032                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1033                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1034                                 0xff, 0xff}; /* System code */
1035
1036         u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1037                                0x0, 0x0, 0x0,
1038                                0x40}; /* SEL_RES for DEP */
1039
1040         unsigned int skb_len = 36 + /*
1041                                      * mode (1), mifare (6),
1042                                      * felica (18), nfcid3 (10), gb_len (1)
1043                                      */
1044                                gbytes_len +
1045                                1;  /* len Tk*/
1046
1047         skb = pn533_alloc_skb(dev, skb_len);
1048         if (!skb)
1049                 return NULL;
1050
1051         /* DEP support only */
1052         skb_put_u8(skb, PN533_INIT_TARGET_DEP);
1053
1054         /* MIFARE params */
1055         skb_put_data(skb, mifare_params, 6);
1056
1057         /* Felica params */
1058         felica = skb_put_data(skb, felica_params, 18);
1059         get_random_bytes(felica + 2, 6);
1060
1061         /* NFCID3 */
1062         nfcid3 = skb_put_zero(skb, 10);
1063         memcpy(nfcid3, felica, 8);
1064
1065         /* General bytes */
1066         skb_put_u8(skb, gbytes_len);
1067
1068         skb_put_data(skb, gbytes, gbytes_len);
1069
1070         /* Len Tk */
1071         skb_put_u8(skb, 0);
1072
1073         return skb;
1074 }
1075
1076 static void pn533_wq_tm_mi_recv(struct work_struct *work);
1077 static struct sk_buff *pn533_build_response(struct pn533 *dev);
1078
1079 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1080                                       struct sk_buff *resp)
1081 {
1082         struct sk_buff *skb;
1083         u8 status, ret, mi;
1084         int rc;
1085
1086         dev_dbg(dev->dev, "%s\n", __func__);
1087
1088         if (IS_ERR(resp)) {
1089                 skb_queue_purge(&dev->resp_q);
1090                 return PTR_ERR(resp);
1091         }
1092
1093         status = resp->data[0];
1094
1095         ret = status & PN533_CMD_RET_MASK;
1096         mi = status & PN533_CMD_MI_MASK;
1097
1098         skb_pull(resp, sizeof(status));
1099
1100         if (ret != PN533_CMD_RET_SUCCESS) {
1101                 rc = -EIO;
1102                 goto error;
1103         }
1104
1105         skb_queue_tail(&dev->resp_q, resp);
1106
1107         if (mi) {
1108                 queue_work(dev->wq, &dev->mi_tm_rx_work);
1109                 return -EINPROGRESS;
1110         }
1111
1112         skb = pn533_build_response(dev);
1113         if (!skb) {
1114                 rc = -EIO;
1115                 goto error;
1116         }
1117
1118         return nfc_tm_data_received(dev->nfc_dev, skb);
1119
1120 error:
1121         nfc_tm_deactivated(dev->nfc_dev);
1122         dev->tgt_mode = 0;
1123         skb_queue_purge(&dev->resp_q);
1124         dev_kfree_skb(resp);
1125
1126         return rc;
1127 }
1128
1129 static void pn533_wq_tm_mi_recv(struct work_struct *work)
1130 {
1131         struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work);
1132         struct sk_buff *skb;
1133         int rc;
1134
1135         dev_dbg(dev->dev, "%s\n", __func__);
1136
1137         skb = pn533_alloc_skb(dev, 0);
1138         if (!skb)
1139                 return;
1140
1141         rc = pn533_send_cmd_direct_async(dev,
1142                                         PN533_CMD_TG_GET_DATA,
1143                                         skb,
1144                                         pn533_tm_get_data_complete,
1145                                         NULL);
1146
1147         if (rc < 0)
1148                 dev_kfree_skb(skb);
1149 }
1150
1151 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
1152                                   struct sk_buff *resp);
1153 static void pn533_wq_tm_mi_send(struct work_struct *work)
1154 {
1155         struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work);
1156         struct sk_buff *skb;
1157         int rc;
1158
1159         dev_dbg(dev->dev, "%s\n", __func__);
1160
1161         /* Grab the first skb in the queue */
1162         skb = skb_dequeue(&dev->fragment_skb);
1163         if (skb == NULL) {      /* No more data */
1164                 /* Reset the queue for future use */
1165                 skb_queue_head_init(&dev->fragment_skb);
1166                 goto error;
1167         }
1168
1169         /* last entry - remove MI bit */
1170         if (skb_queue_len(&dev->fragment_skb) == 0) {
1171                 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
1172                                         skb, pn533_tm_send_complete, NULL);
1173         } else
1174                 rc = pn533_send_cmd_direct_async(dev,
1175                                         PN533_CMD_TG_SET_META_DATA,
1176                                         skb, pn533_tm_send_complete, NULL);
1177
1178         if (rc == 0) /* success */
1179                 return;
1180
1181         dev_err(dev->dev,
1182                 "Error %d when trying to perform set meta data_exchange", rc);
1183
1184         dev_kfree_skb(skb);
1185
1186 error:
1187         dev->phy_ops->send_ack(dev, GFP_KERNEL);
1188         queue_work(dev->wq, &dev->cmd_work);
1189 }
1190
1191 static void pn533_wq_tg_get_data(struct work_struct *work)
1192 {
1193         struct pn533 *dev = container_of(work, struct pn533, tg_work);
1194         struct sk_buff *skb;
1195         int rc;
1196
1197         dev_dbg(dev->dev, "%s\n", __func__);
1198
1199         skb = pn533_alloc_skb(dev, 0);
1200         if (!skb)
1201                 return;
1202
1203         rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1204                                    pn533_tm_get_data_complete, NULL);
1205
1206         if (rc < 0)
1207                 dev_kfree_skb(skb);
1208 }
1209
1210 #define ATR_REQ_GB_OFFSET 17
1211 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1212 {
1213         u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1214         size_t gb_len;
1215         int rc;
1216
1217         dev_dbg(dev->dev, "%s\n", __func__);
1218
1219         if (resp->len < ATR_REQ_GB_OFFSET + 1)
1220                 return -EINVAL;
1221
1222         mode = resp->data[0];
1223         cmd = &resp->data[1];
1224
1225         dev_dbg(dev->dev, "Target mode 0x%x len %d\n",
1226                 mode, resp->len);
1227
1228         if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1229             PN533_INIT_TARGET_RESP_ACTIVE)
1230                 comm_mode = NFC_COMM_ACTIVE;
1231
1232         if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0)  /* Only DEP supported */
1233                 return -EOPNOTSUPP;
1234
1235         gb = cmd + ATR_REQ_GB_OFFSET;
1236         gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1237
1238         rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1239                               comm_mode, gb, gb_len);
1240         if (rc < 0) {
1241                 nfc_err(dev->dev,
1242                         "Error when signaling target activation\n");
1243                 return rc;
1244         }
1245
1246         dev->tgt_mode = 1;
1247         queue_work(dev->wq, &dev->tg_work);
1248
1249         return 0;
1250 }
1251
1252 static void pn533_listen_mode_timer(struct timer_list *t)
1253 {
1254         struct pn533 *dev = from_timer(dev, t, listen_timer);
1255
1256         dev_dbg(dev->dev, "Listen mode timeout\n");
1257
1258         dev->cancel_listen = 1;
1259
1260         pn533_poll_next_mod(dev);
1261
1262         queue_delayed_work(dev->wq, &dev->poll_work,
1263                            msecs_to_jiffies(PN533_POLL_INTERVAL));
1264 }
1265
1266 static int pn533_rf_complete(struct pn533 *dev, void *arg,
1267                              struct sk_buff *resp)
1268 {
1269         int rc = 0;
1270
1271         dev_dbg(dev->dev, "%s\n", __func__);
1272
1273         if (IS_ERR(resp)) {
1274                 rc = PTR_ERR(resp);
1275
1276                 nfc_err(dev->dev, "RF setting error %d\n", rc);
1277
1278                 return rc;
1279         }
1280
1281         queue_delayed_work(dev->wq, &dev->poll_work,
1282                            msecs_to_jiffies(PN533_POLL_INTERVAL));
1283
1284         dev_kfree_skb(resp);
1285         return rc;
1286 }
1287
1288 static void pn533_wq_rf(struct work_struct *work)
1289 {
1290         struct pn533 *dev = container_of(work, struct pn533, rf_work);
1291         struct sk_buff *skb;
1292         int rc;
1293
1294         dev_dbg(dev->dev, "%s\n", __func__);
1295
1296         skb = pn533_alloc_skb(dev, 2);
1297         if (!skb)
1298                 return;
1299
1300         skb_put_u8(skb, PN533_CFGITEM_RF_FIELD);
1301         skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA);
1302
1303         rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1304                                   pn533_rf_complete, NULL);
1305         if (rc < 0) {
1306                 dev_kfree_skb(skb);
1307                 nfc_err(dev->dev, "RF setting error %d\n", rc);
1308         }
1309 }
1310
1311 static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
1312                                    struct sk_buff *resp)
1313 {
1314         struct pn533_cmd_jump_dep_response *rsp;
1315         struct nfc_target nfc_target;
1316         u8 target_gt_len;
1317         int rc;
1318
1319         if (IS_ERR(resp))
1320                 return PTR_ERR(resp);
1321
1322         memset(&nfc_target, 0, sizeof(struct nfc_target));
1323
1324         rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1325
1326         rc = rsp->status & PN533_CMD_RET_MASK;
1327         if (rc != PN533_CMD_RET_SUCCESS) {
1328                 /* Not target found, turn radio off */
1329                 queue_work(dev->wq, &dev->rf_work);
1330
1331                 dev_kfree_skb(resp);
1332                 return 0;
1333         }
1334
1335         dev_dbg(dev->dev, "Creating new target");
1336
1337         nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1338         nfc_target.nfcid1_len = 10;
1339         memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1340         rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1341         if (rc)
1342                 goto error;
1343
1344         dev->tgt_available_prots = 0;
1345         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1346
1347         /* ATR_RES general bytes are located at offset 17 */
1348         target_gt_len = resp->len - 17;
1349         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1350                                           rsp->gt, target_gt_len);
1351         if (!rc) {
1352                 rc = nfc_dep_link_is_up(dev->nfc_dev,
1353                                         dev->nfc_dev->targets[0].idx,
1354                                         0, NFC_RF_INITIATOR);
1355
1356                 if (!rc)
1357                         pn533_poll_reset_mod_list(dev);
1358         }
1359 error:
1360         dev_kfree_skb(resp);
1361         return rc;
1362 }
1363
1364 #define PASSIVE_DATA_LEN 5
1365 static int pn533_poll_dep(struct nfc_dev *nfc_dev)
1366 {
1367         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1368         struct sk_buff *skb;
1369         int rc, skb_len;
1370         u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
1371         u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1372
1373         dev_dbg(dev->dev, "%s", __func__);
1374
1375         if (!dev->gb) {
1376                 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1377
1378                 if (!dev->gb || !dev->gb_len) {
1379                         dev->poll_dep = 0;
1380                         queue_work(dev->wq, &dev->rf_work);
1381                 }
1382         }
1383
1384         skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
1385         skb_len += PASSIVE_DATA_LEN;
1386
1387         /* NFCID3 */
1388         skb_len += NFC_NFCID3_MAXSIZE;
1389         nfcid3[0] = 0x1;
1390         nfcid3[1] = 0xfe;
1391         get_random_bytes(nfcid3 + 2, 6);
1392
1393         skb = pn533_alloc_skb(dev, skb_len);
1394         if (!skb)
1395                 return -ENOMEM;
1396
1397         skb_put_u8(skb, 0x01);  /* Active */
1398         skb_put_u8(skb, 0x02);  /* 424 kbps */
1399
1400         next = skb_put(skb, 1);  /* Next */
1401         *next = 0;
1402
1403         /* Copy passive data */
1404         skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
1405         *next |= 1;
1406
1407         /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1408         skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
1409         *next |= 2;
1410
1411         skb_put_data(skb, dev->gb, dev->gb_len);
1412         *next |= 4; /* We have some Gi */
1413
1414         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1415                                   pn533_poll_dep_complete, NULL);
1416
1417         if (rc < 0)
1418                 dev_kfree_skb(skb);
1419
1420         return rc;
1421 }
1422
1423 static int pn533_autopoll_complete(struct pn533 *dev, void *arg,
1424                                struct sk_buff *resp)
1425 {
1426         struct pn532_autopoll_resp *apr;
1427         struct nfc_target nfc_tgt;
1428         u8 nbtg;
1429         int rc;
1430
1431         if (IS_ERR(resp)) {
1432                 rc = PTR_ERR(resp);
1433
1434                 nfc_err(dev->dev, "%s  autopoll complete error %d\n",
1435                         __func__, rc);
1436
1437                 if (rc == -ENOENT) {
1438                         if (dev->poll_mod_count != 0)
1439                                 return rc;
1440                         goto stop_poll;
1441                 } else if (rc < 0) {
1442                         nfc_err(dev->dev,
1443                                 "Error %d when running autopoll\n", rc);
1444                         goto stop_poll;
1445                 }
1446         }
1447
1448         nbtg = resp->data[0];
1449         if ((nbtg > 2) || (nbtg <= 0))
1450                 return -EAGAIN;
1451
1452         apr = (struct pn532_autopoll_resp *)&resp->data[1];
1453         while (nbtg--) {
1454                 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1455                 switch (apr->type) {
1456                 case PN532_AUTOPOLL_TYPE_ISOA:
1457                         dev_dbg(dev->dev, "ISOA\n");
1458                         rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
1459                                                        apr->ln - 1);
1460                         break;
1461                 case PN532_AUTOPOLL_TYPE_FELICA212:
1462                 case PN532_AUTOPOLL_TYPE_FELICA424:
1463                         dev_dbg(dev->dev, "FELICA\n");
1464                         rc = pn533_target_found_felica(&nfc_tgt, apr->tgdata,
1465                                                        apr->ln - 1);
1466                         break;
1467                 case PN532_AUTOPOLL_TYPE_JEWEL:
1468                         dev_dbg(dev->dev, "JEWEL\n");
1469                         rc = pn533_target_found_jewel(&nfc_tgt, apr->tgdata,
1470                                                       apr->ln - 1);
1471                         break;
1472                 case PN532_AUTOPOLL_TYPE_ISOB:
1473                         dev_dbg(dev->dev, "ISOB\n");
1474                         rc = pn533_target_found_type_b(&nfc_tgt, apr->tgdata,
1475                                                        apr->ln - 1);
1476                         break;
1477                 case PN532_AUTOPOLL_TYPE_MIFARE:
1478                         dev_dbg(dev->dev, "Mifare\n");
1479                         rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
1480                                                        apr->ln - 1);
1481                         break;
1482                 default:
1483                         nfc_err(dev->dev,
1484                                     "Unknown current poll modulation\n");
1485                         rc = -EPROTO;
1486                 }
1487
1488                 if (rc)
1489                         goto done;
1490
1491                 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1492                         nfc_err(dev->dev,
1493                                     "The Tg found doesn't have the desired protocol\n");
1494                         rc = -EAGAIN;
1495                         goto done;
1496                 }
1497
1498                 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1499                 apr = (struct pn532_autopoll_resp *)
1500                         (apr->tgdata + (apr->ln - 1));
1501         }
1502
1503         pn533_poll_reset_mod_list(dev);
1504         nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1505
1506 done:
1507         dev_kfree_skb(resp);
1508         return rc;
1509
1510 stop_poll:
1511         nfc_err(dev->dev, "autopoll operation has been stopped\n");
1512
1513         pn533_poll_reset_mod_list(dev);
1514         dev->poll_protocols = 0;
1515         return rc;
1516 }
1517
1518 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1519                                struct sk_buff *resp)
1520 {
1521         struct pn533_poll_modulations *cur_mod;
1522         int rc;
1523
1524         dev_dbg(dev->dev, "%s\n", __func__);
1525
1526         if (IS_ERR(resp)) {
1527                 rc = PTR_ERR(resp);
1528
1529                 nfc_err(dev->dev, "%s  Poll complete error %d\n",
1530                         __func__, rc);
1531
1532                 if (rc == -ENOENT) {
1533                         if (dev->poll_mod_count != 0)
1534                                 return rc;
1535                         goto stop_poll;
1536                 } else if (rc < 0) {
1537                         nfc_err(dev->dev,
1538                                 "Error %d when running poll\n", rc);
1539                         goto stop_poll;
1540                 }
1541         }
1542
1543         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1544
1545         if (cur_mod->len == 0) { /* Target mode */
1546                 del_timer(&dev->listen_timer);
1547                 rc = pn533_init_target_complete(dev, resp);
1548                 goto done;
1549         }
1550
1551         /* Initiator mode */
1552         rc = pn533_start_poll_complete(dev, resp);
1553         if (!rc)
1554                 goto done;
1555
1556         if (!dev->poll_mod_count) {
1557                 dev_dbg(dev->dev, "Polling has been stopped\n");
1558                 goto done;
1559         }
1560
1561         pn533_poll_next_mod(dev);
1562         /* Not target found, turn radio off */
1563         queue_work(dev->wq, &dev->rf_work);
1564
1565 done:
1566         dev_kfree_skb(resp);
1567         return rc;
1568
1569 stop_poll:
1570         nfc_err(dev->dev, "Polling operation has been stopped\n");
1571
1572         pn533_poll_reset_mod_list(dev);
1573         dev->poll_protocols = 0;
1574         return rc;
1575 }
1576
1577 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1578                                         struct pn533_poll_modulations *mod)
1579 {
1580         struct sk_buff *skb;
1581
1582         skb = pn533_alloc_skb(dev, mod->len);
1583         if (!skb)
1584                 return NULL;
1585
1586         skb_put_data(skb, &mod->data, mod->len);
1587
1588         return skb;
1589 }
1590
1591 static int pn533_send_poll_frame(struct pn533 *dev)
1592 {
1593         struct pn533_poll_modulations *mod;
1594         struct sk_buff *skb;
1595         int rc;
1596         u8 cmd_code;
1597
1598         mod = dev->poll_mod_active[dev->poll_mod_curr];
1599
1600         dev_dbg(dev->dev, "%s mod len %d\n",
1601                 __func__, mod->len);
1602
1603         if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep)  {
1604                 dev->poll_dep = 0;
1605                 return pn533_poll_dep(dev->nfc_dev);
1606         }
1607
1608         if (mod->len == 0) {  /* Listen mode */
1609                 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1610                 skb = pn533_alloc_poll_tg_frame(dev);
1611         } else {  /* Polling mode */
1612                 cmd_code =  PN533_CMD_IN_LIST_PASSIVE_TARGET;
1613                 skb = pn533_alloc_poll_in_frame(dev, mod);
1614         }
1615
1616         if (!skb) {
1617                 nfc_err(dev->dev, "Failed to allocate skb\n");
1618                 return -ENOMEM;
1619         }
1620
1621         rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1622                                   NULL);
1623         if (rc < 0) {
1624                 dev_kfree_skb(skb);
1625                 nfc_err(dev->dev, "Polling loop error %d\n", rc);
1626         }
1627
1628         return rc;
1629 }
1630
1631 static void pn533_wq_poll(struct work_struct *work)
1632 {
1633         struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
1634         struct pn533_poll_modulations *cur_mod;
1635         int rc;
1636
1637         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1638
1639         dev_dbg(dev->dev,
1640                 "%s cancel_listen %d modulation len %d\n",
1641                 __func__, dev->cancel_listen, cur_mod->len);
1642
1643         if (dev->cancel_listen == 1) {
1644                 dev->cancel_listen = 0;
1645                 dev->phy_ops->abort_cmd(dev, GFP_ATOMIC);
1646         }
1647
1648         rc = pn533_send_poll_frame(dev);
1649         if (rc)
1650                 return;
1651
1652         if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1653                 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1654 }
1655
1656 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1657                             u32 im_protocols, u32 tm_protocols)
1658 {
1659         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1660         struct pn533_poll_modulations *cur_mod;
1661         struct sk_buff *skb;
1662         u8 rand_mod;
1663         int rc;
1664
1665         dev_dbg(dev->dev,
1666                 "%s: im protocols 0x%x tm protocols 0x%x\n",
1667                 __func__, im_protocols, tm_protocols);
1668
1669         if (dev->tgt_active_prot) {
1670                 nfc_err(dev->dev,
1671                         "Cannot poll with a target already activated\n");
1672                 return -EBUSY;
1673         }
1674
1675         if (dev->tgt_mode) {
1676                 nfc_err(dev->dev,
1677                         "Cannot poll while already being activated\n");
1678                 return -EBUSY;
1679         }
1680
1681         if (tm_protocols) {
1682                 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1683                 if (dev->gb == NULL)
1684                         tm_protocols = 0;
1685         }
1686
1687         dev->poll_protocols = im_protocols;
1688         dev->listen_protocols = tm_protocols;
1689         if (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL) {
1690                 skb = pn533_alloc_skb(dev, 4 + 6);
1691                 if (!skb)
1692                         return -ENOMEM;
1693
1694                 *((u8 *)skb_put(skb, sizeof(u8))) =
1695                         PN532_AUTOPOLL_POLLNR_INFINITE;
1696                 *((u8 *)skb_put(skb, sizeof(u8))) = PN532_AUTOPOLL_PERIOD;
1697
1698                 if ((im_protocols & NFC_PROTO_MIFARE_MASK) &&
1699                                 (im_protocols & NFC_PROTO_ISO14443_MASK) &&
1700                                 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1701                         *((u8 *)skb_put(skb, sizeof(u8))) =
1702                                 PN532_AUTOPOLL_TYPE_GENERIC_106;
1703                 else {
1704                         if (im_protocols & NFC_PROTO_MIFARE_MASK)
1705                                 *((u8 *)skb_put(skb, sizeof(u8))) =
1706                                         PN532_AUTOPOLL_TYPE_MIFARE;
1707
1708                         if (im_protocols & NFC_PROTO_ISO14443_MASK)
1709                                 *((u8 *)skb_put(skb, sizeof(u8))) =
1710                                         PN532_AUTOPOLL_TYPE_ISOA;
1711
1712                         if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1713                                 *((u8 *)skb_put(skb, sizeof(u8))) =
1714                                         PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106;
1715                                 *((u8 *)skb_put(skb, sizeof(u8))) =
1716                                         PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212;
1717                                 *((u8 *)skb_put(skb, sizeof(u8))) =
1718                                         PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424;
1719                         }
1720                 }
1721
1722                 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1723                                 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1724                         *((u8 *)skb_put(skb, sizeof(u8))) =
1725                                 PN532_AUTOPOLL_TYPE_FELICA212;
1726                         *((u8 *)skb_put(skb, sizeof(u8))) =
1727                                 PN532_AUTOPOLL_TYPE_FELICA424;
1728                 }
1729
1730                 if (im_protocols & NFC_PROTO_JEWEL_MASK)
1731                         *((u8 *)skb_put(skb, sizeof(u8))) =
1732                                 PN532_AUTOPOLL_TYPE_JEWEL;
1733
1734                 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1735                         *((u8 *)skb_put(skb, sizeof(u8))) =
1736                                 PN532_AUTOPOLL_TYPE_ISOB;
1737
1738                 if (tm_protocols)
1739                         *((u8 *)skb_put(skb, sizeof(u8))) =
1740                                 PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106;
1741
1742                 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_AUTOPOLL, skb,
1743                                 pn533_autopoll_complete, NULL);
1744
1745                 if (rc < 0)
1746                         dev_kfree_skb(skb);
1747                 else
1748                         dev->poll_mod_count++;
1749
1750                 return rc;
1751         }
1752
1753         pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1754
1755         /* Do not always start polling from the same modulation */
1756         get_random_bytes(&rand_mod, sizeof(rand_mod));
1757         rand_mod %= dev->poll_mod_count;
1758         dev->poll_mod_curr = rand_mod;
1759
1760         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1761
1762         rc = pn533_send_poll_frame(dev);
1763
1764         /* Start listen timer */
1765         if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
1766                 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1767
1768         return rc;
1769 }
1770
1771 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1772 {
1773         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1774
1775         del_timer(&dev->listen_timer);
1776
1777         if (!dev->poll_mod_count) {
1778                 dev_dbg(dev->dev,
1779                         "Polling operation was not running\n");
1780                 return;
1781         }
1782
1783         dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
1784         flush_delayed_work(&dev->poll_work);
1785         pn533_poll_reset_mod_list(dev);
1786 }
1787
1788 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1789 {
1790         struct pn533_cmd_activate_response *rsp;
1791         u16 gt_len;
1792         int rc;
1793         struct sk_buff *skb;
1794         struct sk_buff *resp;
1795
1796         dev_dbg(dev->dev, "%s\n", __func__);
1797
1798         skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1799         if (!skb)
1800                 return -ENOMEM;
1801
1802         skb_put_u8(skb, 1); /* TG */
1803         skb_put_u8(skb, 0); /* Next */
1804
1805         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1806         if (IS_ERR(resp))
1807                 return PTR_ERR(resp);
1808
1809         rsp = (struct pn533_cmd_activate_response *)resp->data;
1810         rc = rsp->status & PN533_CMD_RET_MASK;
1811         if (rc != PN533_CMD_RET_SUCCESS) {
1812                 nfc_err(dev->dev,
1813                         "Target activation failed (error 0x%x)\n", rc);
1814                 dev_kfree_skb(resp);
1815                 return -EIO;
1816         }
1817
1818         /* ATR_RES general bytes are located at offset 16 */
1819         gt_len = resp->len - 16;
1820         rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1821
1822         dev_kfree_skb(resp);
1823         return rc;
1824 }
1825
1826 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1827                                  struct nfc_target *target, u32 protocol)
1828 {
1829         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1830         int rc;
1831
1832         dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol);
1833
1834         if (dev->poll_mod_count) {
1835                 nfc_err(dev->dev,
1836                         "Cannot activate while polling\n");
1837                 return -EBUSY;
1838         }
1839
1840         if (dev->tgt_active_prot) {
1841                 nfc_err(dev->dev,
1842                         "There is already an active target\n");
1843                 return -EBUSY;
1844         }
1845
1846         if (!dev->tgt_available_prots) {
1847                 nfc_err(dev->dev,
1848                         "There is no available target to activate\n");
1849                 return -EINVAL;
1850         }
1851
1852         if (!(dev->tgt_available_prots & (1 << protocol))) {
1853                 nfc_err(dev->dev,
1854                         "Target doesn't support requested proto %u\n",
1855                         protocol);
1856                 return -EINVAL;
1857         }
1858
1859         if (protocol == NFC_PROTO_NFC_DEP) {
1860                 rc = pn533_activate_target_nfcdep(dev);
1861                 if (rc) {
1862                         nfc_err(dev->dev,
1863                                 "Activating target with DEP failed %d\n", rc);
1864                         return rc;
1865                 }
1866         }
1867
1868         dev->tgt_active_prot = protocol;
1869         dev->tgt_available_prots = 0;
1870
1871         return 0;
1872 }
1873
1874 static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg,
1875                              struct sk_buff *resp)
1876 {
1877         int rc = 0;
1878
1879         dev_dbg(dev->dev, "%s\n", __func__);
1880
1881         if (IS_ERR(resp)) {
1882                 rc = PTR_ERR(resp);
1883
1884                 nfc_err(dev->dev, "Target release error %d\n", rc);
1885
1886                 return rc;
1887         }
1888
1889         rc = resp->data[0] & PN533_CMD_RET_MASK;
1890         if (rc != PN533_CMD_RET_SUCCESS)
1891                 nfc_err(dev->dev,
1892                         "Error 0x%x when releasing the target\n", rc);
1893
1894         dev_kfree_skb(resp);
1895         return rc;
1896 }
1897
1898 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1899                                     struct nfc_target *target, u8 mode)
1900 {
1901         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1902         struct sk_buff *skb;
1903         int rc;
1904
1905         dev_dbg(dev->dev, "%s\n", __func__);
1906
1907         if (!dev->tgt_active_prot) {
1908                 nfc_err(dev->dev, "There is no active target\n");
1909                 return;
1910         }
1911
1912         dev->tgt_active_prot = 0;
1913         skb_queue_purge(&dev->resp_q);
1914
1915         skb = pn533_alloc_skb(dev, sizeof(u8));
1916         if (!skb)
1917                 return;
1918
1919         skb_put_u8(skb, 1); /* TG*/
1920
1921         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
1922                                   pn533_deactivate_target_complete, NULL);
1923         if (rc < 0) {
1924                 dev_kfree_skb(skb);
1925                 nfc_err(dev->dev, "Target release error %d\n", rc);
1926         }
1927 }
1928
1929
1930 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1931                                          struct sk_buff *resp)
1932 {
1933         struct pn533_cmd_jump_dep_response *rsp;
1934         u8 target_gt_len;
1935         int rc;
1936         u8 active = *(u8 *)arg;
1937
1938         kfree(arg);
1939
1940         if (IS_ERR(resp))
1941                 return PTR_ERR(resp);
1942
1943         if (dev->tgt_available_prots &&
1944             !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1945                 nfc_err(dev->dev,
1946                         "The target does not support DEP\n");
1947                 rc =  -EINVAL;
1948                 goto error;
1949         }
1950
1951         rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1952
1953         rc = rsp->status & PN533_CMD_RET_MASK;
1954         if (rc != PN533_CMD_RET_SUCCESS) {
1955                 nfc_err(dev->dev,
1956                         "Bringing DEP link up failed (error 0x%x)\n", rc);
1957                 goto error;
1958         }
1959
1960         if (!dev->tgt_available_prots) {
1961                 struct nfc_target nfc_target;
1962
1963                 dev_dbg(dev->dev, "Creating new target\n");
1964
1965                 memset(&nfc_target, 0, sizeof(struct nfc_target));
1966
1967                 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1968                 nfc_target.nfcid1_len = 10;
1969                 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1970                 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1971                 if (rc)
1972                         goto error;
1973
1974                 dev->tgt_available_prots = 0;
1975         }
1976
1977         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1978
1979         /* ATR_RES general bytes are located at offset 17 */
1980         target_gt_len = resp->len - 17;
1981         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1982                                           rsp->gt, target_gt_len);
1983         if (rc == 0)
1984                 rc = nfc_dep_link_is_up(dev->nfc_dev,
1985                                         dev->nfc_dev->targets[0].idx,
1986                                         !active, NFC_RF_INITIATOR);
1987
1988 error:
1989         dev_kfree_skb(resp);
1990         return rc;
1991 }
1992
1993 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
1994 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1995                              u8 comm_mode, u8 *gb, size_t gb_len)
1996 {
1997         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1998         struct sk_buff *skb;
1999         int rc, skb_len;
2000         u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
2001         u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
2002
2003         dev_dbg(dev->dev, "%s\n", __func__);
2004
2005         if (dev->poll_mod_count) {
2006                 nfc_err(dev->dev,
2007                         "Cannot bring the DEP link up while polling\n");
2008                 return -EBUSY;
2009         }
2010
2011         if (dev->tgt_active_prot) {
2012                 nfc_err(dev->dev,
2013                         "There is already an active target\n");
2014                 return -EBUSY;
2015         }
2016
2017         skb_len = 3 + gb_len; /* ActPass + BR + Next */
2018         skb_len += PASSIVE_DATA_LEN;
2019
2020         /* NFCID3 */
2021         skb_len += NFC_NFCID3_MAXSIZE;
2022         if (target && !target->nfcid2_len) {
2023                 nfcid3[0] = 0x1;
2024                 nfcid3[1] = 0xfe;
2025                 get_random_bytes(nfcid3 + 2, 6);
2026         }
2027
2028         skb = pn533_alloc_skb(dev, skb_len);
2029         if (!skb)
2030                 return -ENOMEM;
2031
2032         skb_put_u8(skb, !comm_mode);  /* ActPass */
2033         skb_put_u8(skb, 0x02);  /* 424 kbps */
2034
2035         next = skb_put(skb, 1);  /* Next */
2036         *next = 0;
2037
2038         /* Copy passive data */
2039         skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
2040         *next |= 1;
2041
2042         /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
2043         if (target && target->nfcid2_len)
2044                 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2045                        target->nfcid2_len);
2046         else
2047                 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
2048         *next |= 2;
2049
2050         if (gb != NULL && gb_len > 0) {
2051                 skb_put_data(skb, gb, gb_len);
2052                 *next |= 4; /* We have some Gi */
2053         } else {
2054                 *next = 0;
2055         }
2056
2057         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2058         if (!arg) {
2059                 dev_kfree_skb(skb);
2060                 return -ENOMEM;
2061         }
2062
2063         *arg = !comm_mode;
2064
2065         pn533_rf_field(dev->nfc_dev, 0);
2066
2067         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2068                                   pn533_in_dep_link_up_complete, arg);
2069
2070         if (rc < 0) {
2071                 dev_kfree_skb(skb);
2072                 kfree(arg);
2073         }
2074
2075         return rc;
2076 }
2077
2078 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2079 {
2080         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2081
2082         dev_dbg(dev->dev, "%s\n", __func__);
2083
2084         pn533_poll_reset_mod_list(dev);
2085
2086         if (dev->tgt_mode || dev->tgt_active_prot)
2087                 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
2088
2089         dev->tgt_active_prot = 0;
2090         dev->tgt_mode = 0;
2091
2092         skb_queue_purge(&dev->resp_q);
2093
2094         return 0;
2095 }
2096
2097 struct pn533_data_exchange_arg {
2098         data_exchange_cb_t cb;
2099         void *cb_context;
2100 };
2101
2102 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2103 {
2104         struct sk_buff *skb, *tmp, *t;
2105         unsigned int skb_len = 0, tmp_len = 0;
2106
2107         dev_dbg(dev->dev, "%s\n", __func__);
2108
2109         if (skb_queue_empty(&dev->resp_q))
2110                 return NULL;
2111
2112         if (skb_queue_len(&dev->resp_q) == 1) {
2113                 skb = skb_dequeue(&dev->resp_q);
2114                 goto out;
2115         }
2116
2117         skb_queue_walk_safe(&dev->resp_q, tmp, t)
2118                 skb_len += tmp->len;
2119
2120         dev_dbg(dev->dev, "%s total length %d\n",
2121                 __func__, skb_len);
2122
2123         skb = alloc_skb(skb_len, GFP_KERNEL);
2124         if (skb == NULL)
2125                 goto out;
2126
2127         skb_put(skb, skb_len);
2128
2129         skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2130                 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2131                 tmp_len += tmp->len;
2132         }
2133
2134 out:
2135         skb_queue_purge(&dev->resp_q);
2136
2137         return skb;
2138 }
2139
2140 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2141                                         struct sk_buff *resp)
2142 {
2143         struct pn533_data_exchange_arg *arg = _arg;
2144         struct sk_buff *skb;
2145         int rc = 0;
2146         u8 status, ret, mi;
2147
2148         dev_dbg(dev->dev, "%s\n", __func__);
2149
2150         if (IS_ERR(resp)) {
2151                 rc = PTR_ERR(resp);
2152                 goto _error;
2153         }
2154
2155         status = resp->data[0];
2156         ret = status & PN533_CMD_RET_MASK;
2157         mi = status & PN533_CMD_MI_MASK;
2158
2159         skb_pull(resp, sizeof(status));
2160
2161         if (ret != PN533_CMD_RET_SUCCESS) {
2162                 nfc_err(dev->dev,
2163                         "Exchanging data failed (error 0x%x)\n", ret);
2164                 rc = -EIO;
2165                 goto error;
2166         }
2167
2168         skb_queue_tail(&dev->resp_q, resp);
2169
2170         if (mi) {
2171                 dev->cmd_complete_mi_arg = arg;
2172                 queue_work(dev->wq, &dev->mi_rx_work);
2173                 return -EINPROGRESS;
2174         }
2175
2176         /* Prepare for the next round */
2177         if (skb_queue_len(&dev->fragment_skb) > 0) {
2178                 dev->cmd_complete_dep_arg = arg;
2179                 queue_work(dev->wq, &dev->mi_tx_work);
2180
2181                 return -EINPROGRESS;
2182         }
2183
2184         skb = pn533_build_response(dev);
2185         if (!skb) {
2186                 rc = -ENOMEM;
2187                 goto error;
2188         }
2189
2190         arg->cb(arg->cb_context, skb, 0);
2191         kfree(arg);
2192         return 0;
2193
2194 error:
2195         dev_kfree_skb(resp);
2196 _error:
2197         skb_queue_purge(&dev->resp_q);
2198         arg->cb(arg->cb_context, NULL, rc);
2199         kfree(arg);
2200         return rc;
2201 }
2202
2203 /*
2204  * Receive an incoming pn533 frame. skb contains only header and payload.
2205  * If skb == NULL, it is a notification that the link below is dead.
2206  */
2207 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status)
2208 {
2209         if (!dev->cmd)
2210                 goto sched_wq;
2211
2212         dev->cmd->status = status;
2213
2214         if (status != 0) {
2215                 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status);
2216                 goto sched_wq;
2217         }
2218
2219         if (skb == NULL) {
2220                 pr_err("NULL Frame -> link is dead\n");
2221                 goto sched_wq;
2222         }
2223
2224         if (pn533_rx_frame_is_ack(skb->data)) {
2225                 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__);
2226                 dev_kfree_skb(skb);
2227                 return;
2228         }
2229
2230         print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
2231                              dev->ops->rx_frame_size(skb->data), false);
2232
2233         if (!dev->ops->rx_is_frame_valid(skb->data, dev)) {
2234                 nfc_err(dev->dev, "Received an invalid frame\n");
2235                 dev->cmd->status = -EIO;
2236         } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) {
2237                 nfc_err(dev->dev, "It it not the response to the last command\n");
2238                 dev->cmd->status = -EIO;
2239         }
2240
2241         dev->cmd->resp = skb;
2242
2243 sched_wq:
2244         queue_work(dev->wq, &dev->cmd_complete_work);
2245 }
2246 EXPORT_SYMBOL(pn533_recv_frame);
2247
2248 /* Split the Tx skb into small chunks */
2249 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2250 {
2251         struct sk_buff *frag;
2252         int  frag_size;
2253
2254         do {
2255                 /* Remaining size */
2256                 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2257                         frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2258                 else
2259                         frag_size = skb->len;
2260
2261                 /* Allocate and reserve */
2262                 frag = pn533_alloc_skb(dev, frag_size);
2263                 if (!frag) {
2264                         skb_queue_purge(&dev->fragment_skb);
2265                         return -ENOMEM;
2266                 }
2267
2268                 if (!dev->tgt_mode) {
2269                         /* Reserve the TG/MI byte */
2270                         skb_reserve(frag, 1);
2271
2272                         /* MI + TG */
2273                         if (frag_size  == PN533_CMD_DATAFRAME_MAXLEN)
2274                                 *(u8 *)skb_push(frag, sizeof(u8)) =
2275                                                 (PN533_CMD_MI_MASK | 1);
2276                         else
2277                                 *(u8 *)skb_push(frag, sizeof(u8)) =  1; /* TG */
2278                 }
2279
2280                 skb_put_data(frag, skb->data, frag_size);
2281
2282                 /* Reduce the size of incoming buffer */
2283                 skb_pull(skb, frag_size);
2284
2285                 /* Add this to skb_queue */
2286                 skb_queue_tail(&dev->fragment_skb, frag);
2287
2288         } while (skb->len > 0);
2289
2290         dev_kfree_skb(skb);
2291
2292         return skb_queue_len(&dev->fragment_skb);
2293 }
2294
2295 static int pn533_transceive(struct nfc_dev *nfc_dev,
2296                             struct nfc_target *target, struct sk_buff *skb,
2297                             data_exchange_cb_t cb, void *cb_context)
2298 {
2299         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2300         struct pn533_data_exchange_arg *arg = NULL;
2301         int rc;
2302
2303         dev_dbg(dev->dev, "%s\n", __func__);
2304
2305         if (!dev->tgt_active_prot) {
2306                 nfc_err(dev->dev,
2307                         "Can't exchange data if there is no active target\n");
2308                 rc = -EINVAL;
2309                 goto error;
2310         }
2311
2312         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2313         if (!arg) {
2314                 rc = -ENOMEM;
2315                 goto error;
2316         }
2317
2318         arg->cb = cb;
2319         arg->cb_context = cb_context;
2320
2321         switch (dev->device_type) {
2322         case PN533_DEVICE_PASORI:
2323                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2324                         rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2325                                                    skb,
2326                                                    pn533_data_exchange_complete,
2327                                                    arg);
2328
2329                         break;
2330                 }
2331                 fallthrough;
2332         default:
2333                 /* jumbo frame ? */
2334                 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2335                         rc = pn533_fill_fragment_skbs(dev, skb);
2336                         if (rc < 0)
2337                                 goto error;
2338
2339                         skb = skb_dequeue(&dev->fragment_skb);
2340                         if (!skb) {
2341                                 rc = -EIO;
2342                                 goto error;
2343                         }
2344                 } else {
2345                         *(u8 *)skb_push(skb, sizeof(u8)) =  1; /* TG */
2346                 }
2347
2348                 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2349                                            skb, pn533_data_exchange_complete,
2350                                            arg);
2351
2352                 break;
2353         }
2354
2355         if (rc < 0) /* rc from send_async */
2356                 goto error;
2357
2358         return 0;
2359
2360 error:
2361         kfree(arg);
2362         dev_kfree_skb(skb);
2363         return rc;
2364 }
2365
2366 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2367                                   struct sk_buff *resp)
2368 {
2369         u8 status;
2370
2371         dev_dbg(dev->dev, "%s\n", __func__);
2372
2373         if (IS_ERR(resp))
2374                 return PTR_ERR(resp);
2375
2376         status = resp->data[0];
2377
2378         /* Prepare for the next round */
2379         if (skb_queue_len(&dev->fragment_skb) > 0) {
2380                 queue_work(dev->wq, &dev->mi_tm_tx_work);
2381                 return -EINPROGRESS;
2382         }
2383         dev_kfree_skb(resp);
2384
2385         if (status != 0) {
2386                 nfc_tm_deactivated(dev->nfc_dev);
2387
2388                 dev->tgt_mode = 0;
2389
2390                 return 0;
2391         }
2392
2393         queue_work(dev->wq, &dev->tg_work);
2394
2395         return 0;
2396 }
2397
2398 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2399 {
2400         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2401         int rc;
2402
2403         dev_dbg(dev->dev, "%s\n", __func__);
2404
2405         /* let's split in multiple chunks if size's too big */
2406         if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2407                 rc = pn533_fill_fragment_skbs(dev, skb);
2408                 if (rc < 0)
2409                         goto error;
2410
2411                 /* get the first skb */
2412                 skb = skb_dequeue(&dev->fragment_skb);
2413                 if (!skb) {
2414                         rc = -EIO;
2415                         goto error;
2416                 }
2417
2418                 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
2419                                                 pn533_tm_send_complete, NULL);
2420         } else {
2421                 /* Send th skb */
2422                 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2423                                                 pn533_tm_send_complete, NULL);
2424         }
2425
2426 error:
2427         if (rc < 0) {
2428                 dev_kfree_skb(skb);
2429                 skb_queue_purge(&dev->fragment_skb);
2430         }
2431
2432         return rc;
2433 }
2434
2435 static void pn533_wq_mi_recv(struct work_struct *work)
2436 {
2437         struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
2438         struct sk_buff *skb;
2439         int rc;
2440
2441         dev_dbg(dev->dev, "%s\n", __func__);
2442
2443         skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2444         if (!skb)
2445                 goto error;
2446
2447         switch (dev->device_type) {
2448         case PN533_DEVICE_PASORI:
2449                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2450                         rc = pn533_send_cmd_direct_async(dev,
2451                                                 PN533_CMD_IN_COMM_THRU,
2452                                                 skb,
2453                                                 pn533_data_exchange_complete,
2454                                                  dev->cmd_complete_mi_arg);
2455
2456                         break;
2457                 }
2458                 fallthrough;
2459         default:
2460                 skb_put_u8(skb, 1); /*TG*/
2461
2462                 rc = pn533_send_cmd_direct_async(dev,
2463                                                  PN533_CMD_IN_DATA_EXCHANGE,
2464                                                  skb,
2465                                                  pn533_data_exchange_complete,
2466                                                  dev->cmd_complete_mi_arg);
2467
2468                 break;
2469         }
2470
2471         if (rc == 0) /* success */
2472                 return;
2473
2474         nfc_err(dev->dev,
2475                 "Error %d when trying to perform data_exchange\n", rc);
2476
2477         dev_kfree_skb(skb);
2478         kfree(dev->cmd_complete_mi_arg);
2479
2480 error:
2481         dev->phy_ops->send_ack(dev, GFP_KERNEL);
2482         queue_work(dev->wq, &dev->cmd_work);
2483 }
2484
2485 static void pn533_wq_mi_send(struct work_struct *work)
2486 {
2487         struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2488         struct sk_buff *skb;
2489         int rc;
2490
2491         dev_dbg(dev->dev, "%s\n", __func__);
2492
2493         /* Grab the first skb in the queue */
2494         skb = skb_dequeue(&dev->fragment_skb);
2495
2496         if (skb == NULL) {      /* No more data */
2497                 /* Reset the queue for future use */
2498                 skb_queue_head_init(&dev->fragment_skb);
2499                 goto error;
2500         }
2501
2502         switch (dev->device_type) {
2503         case PN533_DEVICE_PASORI:
2504                 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2505                         rc = -EIO;
2506                         break;
2507                 }
2508
2509                 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2510                                                  skb,
2511                                                  pn533_data_exchange_complete,
2512                                                  dev->cmd_complete_dep_arg);
2513
2514                 break;
2515
2516         default:
2517                 /* Still some fragments? */
2518                 rc = pn533_send_cmd_direct_async(dev,
2519                                                  PN533_CMD_IN_DATA_EXCHANGE,
2520                                                  skb,
2521                                                  pn533_data_exchange_complete,
2522                                                  dev->cmd_complete_dep_arg);
2523
2524                 break;
2525         }
2526
2527         if (rc == 0) /* success */
2528                 return;
2529
2530         nfc_err(dev->dev,
2531                 "Error %d when trying to perform data_exchange\n", rc);
2532
2533         dev_kfree_skb(skb);
2534         kfree(dev->cmd_complete_dep_arg);
2535
2536 error:
2537         dev->phy_ops->send_ack(dev, GFP_KERNEL);
2538         queue_work(dev->wq, &dev->cmd_work);
2539 }
2540
2541 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2542                                                                 u8 cfgdata_len)
2543 {
2544         struct sk_buff *skb;
2545         struct sk_buff *resp;
2546         int skb_len;
2547
2548         dev_dbg(dev->dev, "%s\n", __func__);
2549
2550         skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2551
2552         skb = pn533_alloc_skb(dev, skb_len);
2553         if (!skb)
2554                 return -ENOMEM;
2555
2556         skb_put_u8(skb, cfgitem);
2557         skb_put_data(skb, cfgdata, cfgdata_len);
2558
2559         resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2560         if (IS_ERR(resp))
2561                 return PTR_ERR(resp);
2562
2563         dev_kfree_skb(resp);
2564         return 0;
2565 }
2566
2567 static int pn533_get_firmware_version(struct pn533 *dev,
2568                                       struct pn533_fw_version *fv)
2569 {
2570         struct sk_buff *skb;
2571         struct sk_buff *resp;
2572
2573         skb = pn533_alloc_skb(dev, 0);
2574         if (!skb)
2575                 return -ENOMEM;
2576
2577         resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2578         if (IS_ERR(resp))
2579                 return PTR_ERR(resp);
2580
2581         fv->ic = resp->data[0];
2582         fv->ver = resp->data[1];
2583         fv->rev = resp->data[2];
2584         fv->support = resp->data[3];
2585
2586         dev_kfree_skb(resp);
2587         return 0;
2588 }
2589
2590 static int pn533_pasori_fw_reset(struct pn533 *dev)
2591 {
2592         struct sk_buff *skb;
2593         struct sk_buff *resp;
2594
2595         dev_dbg(dev->dev, "%s\n", __func__);
2596
2597         skb = pn533_alloc_skb(dev, sizeof(u8));
2598         if (!skb)
2599                 return -ENOMEM;
2600
2601         skb_put_u8(skb, 0x1);
2602
2603         resp = pn533_send_cmd_sync(dev, 0x18, skb);
2604         if (IS_ERR(resp))
2605                 return PTR_ERR(resp);
2606
2607         dev_kfree_skb(resp);
2608
2609         return 0;
2610 }
2611
2612 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2613 {
2614         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2615         u8 rf_field = !!rf;
2616         int rc;
2617
2618         rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2619
2620         rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2621                                      (u8 *)&rf_field, 1);
2622         if (rc) {
2623                 nfc_err(dev->dev, "Error on setting RF field\n");
2624                 return rc;
2625         }
2626
2627         return rc;
2628 }
2629
2630 static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
2631 {
2632         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2633         struct sk_buff *skb;
2634         struct sk_buff *resp;
2635
2636         skb = pn533_alloc_skb(dev, 1);
2637         if (!skb)
2638                 return -ENOMEM;
2639
2640         skb_put_u8(skb, 0x01);
2641
2642         resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
2643         if (IS_ERR(resp))
2644                 return PTR_ERR(resp);
2645
2646         dev_kfree_skb(resp);
2647         return 0;
2648 }
2649
2650 static int pn533_dev_up(struct nfc_dev *nfc_dev)
2651 {
2652         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2653         int rc;
2654
2655         if (dev->phy_ops->dev_up) {
2656                 rc = dev->phy_ops->dev_up(dev);
2657                 if (rc)
2658                         return rc;
2659         }
2660
2661         if ((dev->device_type == PN533_DEVICE_PN532) ||
2662                 (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) {
2663                 rc = pn532_sam_configuration(nfc_dev);
2664
2665                 if (rc)
2666                         return rc;
2667         }
2668
2669         return pn533_rf_field(nfc_dev, 1);
2670 }
2671
2672 static int pn533_dev_down(struct nfc_dev *nfc_dev)
2673 {
2674         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2675         int ret;
2676
2677         ret = pn533_rf_field(nfc_dev, 0);
2678         if (dev->phy_ops->dev_down && !ret)
2679                 ret = dev->phy_ops->dev_down(dev);
2680
2681         return ret;
2682 }
2683
2684 static struct nfc_ops pn533_nfc_ops = {
2685         .dev_up = pn533_dev_up,
2686         .dev_down = pn533_dev_down,
2687         .dep_link_up = pn533_dep_link_up,
2688         .dep_link_down = pn533_dep_link_down,
2689         .start_poll = pn533_start_poll,
2690         .stop_poll = pn533_stop_poll,
2691         .activate_target = pn533_activate_target,
2692         .deactivate_target = pn533_deactivate_target,
2693         .im_transceive = pn533_transceive,
2694         .tm_send = pn533_tm_send,
2695 };
2696
2697 static int pn533_setup(struct pn533 *dev)
2698 {
2699         struct pn533_config_max_retries max_retries;
2700         struct pn533_config_timing timing;
2701         u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2702         int rc;
2703
2704         switch (dev->device_type) {
2705         case PN533_DEVICE_STD:
2706         case PN533_DEVICE_PASORI:
2707         case PN533_DEVICE_ACR122U:
2708         case PN533_DEVICE_PN532:
2709         case PN533_DEVICE_PN532_AUTOPOLL:
2710                 max_retries.mx_rty_atr = 0x2;
2711                 max_retries.mx_rty_psl = 0x1;
2712                 max_retries.mx_rty_passive_act =
2713                         PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2714
2715                 timing.rfu = PN533_CONFIG_TIMING_102;
2716                 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2717                 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2718
2719                 break;
2720
2721         default:
2722                 nfc_err(dev->dev, "Unknown device type %d\n",
2723                         dev->device_type);
2724                 return -EINVAL;
2725         }
2726
2727         rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2728                                      (u8 *)&max_retries, sizeof(max_retries));
2729         if (rc) {
2730                 nfc_err(dev->dev,
2731                         "Error on setting MAX_RETRIES config\n");
2732                 return rc;
2733         }
2734
2735
2736         rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2737                                      (u8 *)&timing, sizeof(timing));
2738         if (rc) {
2739                 nfc_err(dev->dev, "Error on setting RF timings\n");
2740                 return rc;
2741         }
2742
2743         switch (dev->device_type) {
2744         case PN533_DEVICE_STD:
2745         case PN533_DEVICE_PN532:
2746         case PN533_DEVICE_PN532_AUTOPOLL:
2747                 break;
2748
2749         case PN533_DEVICE_PASORI:
2750                 pn533_pasori_fw_reset(dev);
2751
2752                 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2753                                              pasori_cfg, 3);
2754                 if (rc) {
2755                         nfc_err(dev->dev,
2756                                 "Error while settings PASORI config\n");
2757                         return rc;
2758                 }
2759
2760                 pn533_pasori_fw_reset(dev);
2761
2762                 break;
2763         }
2764
2765         return 0;
2766 }
2767
2768 int pn533_finalize_setup(struct pn533 *dev)
2769 {
2770
2771         struct pn533_fw_version fw_ver;
2772         int rc;
2773
2774         memset(&fw_ver, 0, sizeof(fw_ver));
2775
2776         rc = pn533_get_firmware_version(dev, &fw_ver);
2777         if (rc) {
2778                 nfc_err(dev->dev, "Unable to get FW version\n");
2779                 return rc;
2780         }
2781
2782         nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
2783                 fw_ver.ic, fw_ver.ver, fw_ver.rev);
2784
2785         rc = pn533_setup(dev);
2786         if (rc)
2787                 return rc;
2788
2789         return 0;
2790 }
2791 EXPORT_SYMBOL_GPL(pn533_finalize_setup);
2792
2793 struct pn533 *pn53x_common_init(u32 device_type,
2794                                 enum pn533_protocol_type protocol_type,
2795                                 void *phy,
2796                                 struct pn533_phy_ops *phy_ops,
2797                                 struct pn533_frame_ops *fops,
2798                                 struct device *dev)
2799 {
2800         struct pn533 *priv;
2801         int rc = -ENOMEM;
2802
2803         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2804         if (!priv)
2805                 return ERR_PTR(-ENOMEM);
2806
2807         priv->phy = phy;
2808         priv->phy_ops = phy_ops;
2809         priv->dev = dev;
2810         if (fops != NULL)
2811                 priv->ops = fops;
2812         else
2813                 priv->ops = &pn533_std_frame_ops;
2814
2815         priv->protocol_type = protocol_type;
2816         priv->device_type = device_type;
2817
2818         mutex_init(&priv->cmd_lock);
2819
2820         INIT_WORK(&priv->cmd_work, pn533_wq_cmd);
2821         INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete);
2822         INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv);
2823         INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send);
2824         INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data);
2825         INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv);
2826         INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send);
2827         INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll);
2828         INIT_WORK(&priv->rf_work, pn533_wq_rf);
2829         priv->wq = alloc_ordered_workqueue("pn533", 0);
2830         if (priv->wq == NULL)
2831                 goto error;
2832
2833         timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0);
2834
2835         skb_queue_head_init(&priv->resp_q);
2836         skb_queue_head_init(&priv->fragment_skb);
2837
2838         INIT_LIST_HEAD(&priv->cmd_queue);
2839         return priv;
2840
2841 error:
2842         kfree(priv);
2843         return ERR_PTR(rc);
2844 }
2845 EXPORT_SYMBOL_GPL(pn53x_common_init);
2846
2847 void pn53x_common_clean(struct pn533 *priv)
2848 {
2849         struct pn533_cmd *cmd, *n;
2850
2851         /* delete the timer before cleanup the worker */
2852         del_timer_sync(&priv->listen_timer);
2853
2854         flush_delayed_work(&priv->poll_work);
2855         destroy_workqueue(priv->wq);
2856
2857         skb_queue_purge(&priv->resp_q);
2858
2859         list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
2860                 list_del(&cmd->queue);
2861                 kfree(cmd);
2862         }
2863
2864         kfree(priv);
2865 }
2866 EXPORT_SYMBOL_GPL(pn53x_common_clean);
2867
2868 int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols,
2869                         struct device *parent)
2870 {
2871         priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2872                                            priv->ops->tx_header_len +
2873                                            PN533_CMD_DATAEXCH_HEAD_LEN,
2874                                            priv->ops->tx_tail_len);
2875         if (!priv->nfc_dev)
2876                 return -ENOMEM;
2877
2878         nfc_set_parent_dev(priv->nfc_dev, parent);
2879         nfc_set_drvdata(priv->nfc_dev, priv);
2880         return 0;
2881 }
2882 EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc);
2883
2884 int pn53x_register_nfc(struct pn533 *priv, u32 protocols,
2885                         struct device *parent)
2886 {
2887         int rc;
2888
2889         rc = pn532_i2c_nfc_alloc(priv, protocols, parent);
2890         if (rc)
2891                 return rc;
2892
2893         rc = nfc_register_device(priv->nfc_dev);
2894         if (rc)
2895                 nfc_free_device(priv->nfc_dev);
2896
2897         return rc;
2898 }
2899 EXPORT_SYMBOL_GPL(pn53x_register_nfc);
2900
2901 void pn53x_unregister_nfc(struct pn533 *priv)
2902 {
2903         nfc_unregister_device(priv->nfc_dev);
2904         nfc_free_device(priv->nfc_dev);
2905 }
2906 EXPORT_SYMBOL_GPL(pn53x_unregister_nfc);
2907
2908 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2909 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2910 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2911 MODULE_DESCRIPTION("PN533 driver ver " VERSION);
2912 MODULE_VERSION(VERSION);
2913 MODULE_LICENSE("GPL");