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 priority 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 successful 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         return true;
 710 }
 711
 712 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
 713                                                         int tgt_data_len)
 714 {
 715         struct pn533_target_type_a *tgt_type_a;
 716
 717         tgt_type_a = (struct pn533_target_type_a *)tgt_data;
 718
 719         if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
 720                 return -EPROTO;
 721
 722         switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
 723         case PN533_TYPE_A_SEL_PROT_MIFARE:
 724                 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
 725                 break;
 726         case PN533_TYPE_A_SEL_PROT_ISO14443:
 727                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
 728                 break;
 729         case PN533_TYPE_A_SEL_PROT_DEP:
 730                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
 731                 break;
 732         case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
 733                 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
 734                                                         NFC_PROTO_NFC_DEP_MASK;
 735                 break;
 736         }
 737
 738         nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
 739         nfc_tgt->sel_res = tgt_type_a->sel_res;
 740         nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
 741         memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
 742
 743         return 0;
 744 }
 745
 746 struct pn533_target_felica {
 747         u8 pol_res;
 748         u8 opcode;
 749         u8 nfcid2[NFC_NFCID2_MAXSIZE];
 750         u8 pad[8];
 751         /* optional */
 752         u8 syst_code[];
 753 } __packed;
 754
 755 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
 756 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
 757
 758 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
 759                                                         int target_data_len)
 760 {
 761         if (target_data_len < sizeof(struct pn533_target_felica))
 762                 return false;
 763
 764         if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
 765                 return false;
 766
 767         return true;
 768 }
 769
 770 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
 771                                                         int tgt_data_len)
 772 {
 773         struct pn533_target_felica *tgt_felica;
 774
 775         tgt_felica = (struct pn533_target_felica *)tgt_data;
 776
 777         if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
 778                 return -EPROTO;
 779
 780         if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
 781             (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
 782                 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
 783         else
 784                 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
 785
 786         memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
 787         nfc_tgt->sensf_res_len = 9;
 788
 789         memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
 790         nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
 791
 792         return 0;
 793 }
 794
 795 struct pn533_target_jewel {
 796         __be16 sens_res;
 797         u8 jewelid[4];
 798 } __packed;
 799
 800 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
 801                                                         int target_data_len)
 802 {
 803         u8 ssd;
 804         u8 platconf;
 805
 806         if (target_data_len < sizeof(struct pn533_target_jewel))
 807                 return false;
 808
 809         /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
 810         ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
 811         platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
 812
 813         if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 814              platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
 815             (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 816              platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
 817                 return false;
 818
 819         return true;
 820 }
 821
 822 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
 823                                                         int tgt_data_len)
 824 {
 825         struct pn533_target_jewel *tgt_jewel;
 826
 827         tgt_jewel = (struct pn533_target_jewel *)tgt_data;
 828
 829         if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
 830                 return -EPROTO;
 831
 832         nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
 833         nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
 834         nfc_tgt->nfcid1_len = 4;
 835         memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
 836
 837         return 0;
 838 }
 839
 840 struct pn533_type_b_prot_info {
 841         u8 bitrate;
 842         u8 fsci_type;
 843         u8 fwi_adc_fo;
 844 } __packed;
 845
 846 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
 847 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
 848 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
 849
 850 struct pn533_type_b_sens_res {
 851         u8 opcode;
 852         u8 nfcid[4];
 853         u8 appdata[4];
 854         struct pn533_type_b_prot_info prot_info;
 855 } __packed;
 856
 857 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
 858
 859 struct pn533_target_type_b {
 860         struct pn533_type_b_sens_res sensb_res;
 861         u8 attrib_res_len;
 862         u8 attrib_res[];
 863 } __packed;
 864
 865 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
 866                                                         int target_data_len)
 867 {
 868         if (target_data_len < sizeof(struct pn533_target_type_b))
 869                 return false;
 870
 871         if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
 872                 return false;
 873
 874         if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
 875                                                 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
 876                 return false;
 877
 878         return true;
 879 }
 880
 881 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
 882                                                         int tgt_data_len)
 883 {
 884         struct pn533_target_type_b *tgt_type_b;
 885
 886         tgt_type_b = (struct pn533_target_type_b *)tgt_data;
 887
 888         if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
 889                 return -EPROTO;
 890
 891         nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
 892
 893         return 0;
 894 }
 895
 896 static void pn533_poll_reset_mod_list(struct pn533 *dev);
 897 static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
 898                               int tgdata_len)
 899 {
 900         struct nfc_target nfc_tgt;
 901         int rc;
 902
 903         dev_dbg(dev->dev, "%s: modulation=%d\n",
 904                 __func__, dev->poll_mod_curr);
 905
 906         if (tg != 1)
 907                 return -EPROTO;
 908
 909         memset(&nfc_tgt, 0, sizeof(struct nfc_target));
 910
 911         switch (dev->poll_mod_curr) {
 912         case PN533_POLL_MOD_106KBPS_A:
 913                 rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
 914                 break;
 915         case PN533_POLL_MOD_212KBPS_FELICA:
 916         case PN533_POLL_MOD_424KBPS_FELICA:
 917                 rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
 918                 break;
 919         case PN533_POLL_MOD_106KBPS_JEWEL:
 920                 rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
 921                 break;
 922         case PN533_POLL_MOD_847KBPS_B:
 923                 rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
 924                 break;
 925         default:
 926                 nfc_err(dev->dev,
 927                         "Unknown current poll modulation\n");
 928                 return -EPROTO;
 929         }
 930
 931         if (rc)
 932                 return rc;
 933
 934         if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
 935                 dev_dbg(dev->dev,
 936                         "The Tg found doesn't have the desired protocol\n");
 937                 return -EAGAIN;
 938         }
 939
 940         dev_dbg(dev->dev,
 941                 "Target found - supported protocols: 0x%x\n",
 942                 nfc_tgt.supported_protocols);
 943
 944         dev->tgt_available_prots = nfc_tgt.supported_protocols;
 945
 946         pn533_poll_reset_mod_list(dev);
 947         nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
 948
 949         return 0;
 950 }
 951
 952 static inline void pn533_poll_next_mod(struct pn533 *dev)
 953 {
 954         dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
 955 }
 956
 957 static void pn533_poll_reset_mod_list(struct pn533 *dev)
 958 {
 959         dev->poll_mod_count = 0;
 960 }
 961
 962 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
 963 {
 964         dev->poll_mod_active[dev->poll_mod_count] =
 965                 (struct pn533_poll_modulations *)&poll_mod[mod_index];
 966         dev->poll_mod_count++;
 967 }
 968
 969 static void pn533_poll_create_mod_list(struct pn533 *dev,
 970                                        u32 im_protocols, u32 tm_protocols)
 971 {
 972         pn533_poll_reset_mod_list(dev);
 973
 974         if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
 975             (im_protocols & NFC_PROTO_ISO14443_MASK) ||
 976             (im_protocols & NFC_PROTO_NFC_DEP_MASK))
 977                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
 978
 979         if (im_protocols & NFC_PROTO_FELICA_MASK ||
 980             im_protocols & NFC_PROTO_NFC_DEP_MASK) {
 981                 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
 982                 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
 983         }
 984
 985         if (im_protocols & NFC_PROTO_JEWEL_MASK)
 986                 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
 987
 988         if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
 989                 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
 990
 991         if (tm_protocols)
 992                 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
 993 }
 994
 995 static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
 996 {
 997         u8 nbtg, tg, *tgdata;
 998         int rc, tgdata_len;
 999
1000         /* Toggle the DEP polling */
1001         if (dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK)
1002                 dev->poll_dep = 1;
1003
1004         nbtg = resp->data[0];
1005         tg = resp->data[1];
1006         tgdata = &resp->data[2];
1007         tgdata_len = resp->len - 2;  /* nbtg + tg */
1008
1009         if (nbtg) {
1010                 rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1011
1012                 /* We must stop the poll after a valid target found */
1013                 if (rc == 0)
1014                         return 0;
1015         }
1016
1017         return -EAGAIN;
1018 }
1019
1020 static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1021 {
1022         struct sk_buff *skb;
1023         u8 *felica, *nfcid3;
1024
1025         u8 *gbytes = dev->gb;
1026         size_t gbytes_len = dev->gb_len;
1027
1028         u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1029                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1030                                 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1031                                 0xff, 0xff}; /* System code */
1032
1033         u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1034                                0x0, 0x0, 0x0,
1035                                0x40}; /* SEL_RES for DEP */
1036
1037         unsigned int skb_len = 36 + /*
1038                                      * mode (1), mifare (6),
1039                                      * felica (18), nfcid3 (10), gb_len (1)
1040                                      */
1041                                gbytes_len +
1042                                1;  /* len Tk*/
1043
1044         skb = pn533_alloc_skb(dev, skb_len);
1045         if (!skb)
1046                 return NULL;
1047
1048         /* DEP support only */
1049         skb_put_u8(skb, PN533_INIT_TARGET_DEP);
1050
1051         /* MIFARE params */
1052         skb_put_data(skb, mifare_params, 6);
1053
1054         /* Felica params */
1055         felica = skb_put_data(skb, felica_params, 18);
1056         get_random_bytes(felica + 2, 6);
1057
1058         /* NFCID3 */
1059         nfcid3 = skb_put_zero(skb, 10);
1060         memcpy(nfcid3, felica, 8);
1061
1062         /* General bytes */
1063         skb_put_u8(skb, gbytes_len);
1064
1065         skb_put_data(skb, gbytes, gbytes_len);
1066
1067         /* Len Tk */
1068         skb_put_u8(skb, 0);
1069
1070         return skb;
1071 }
1072
1073 static void pn533_wq_tm_mi_recv(struct work_struct *work);
1074 static struct sk_buff *pn533_build_response(struct pn533 *dev);
1075
1076 static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1077                                       struct sk_buff *resp)
1078 {
1079         struct sk_buff *skb;
1080         u8 status, ret, mi;
1081         int rc;
1082
1083         dev_dbg(dev->dev, "%s\n", __func__);
1084
1085         if (IS_ERR(resp)) {
1086                 skb_queue_purge(&dev->resp_q);
1087                 return PTR_ERR(resp);
1088         }
1089
1090         status = resp->data[0];
1091
1092         ret = status & PN533_CMD_RET_MASK;
1093         mi = status & PN533_CMD_MI_MASK;
1094
1095         skb_pull(resp, sizeof(status));
1096
1097         if (ret != PN533_CMD_RET_SUCCESS) {
1098                 rc = -EIO;
1099                 goto error;
1100         }
1101
1102         skb_queue_tail(&dev->resp_q, resp);
1103
1104         if (mi) {
1105                 queue_work(dev->wq, &dev->mi_tm_rx_work);
1106                 return -EINPROGRESS;
1107         }
1108
1109         skb = pn533_build_response(dev);
1110         if (!skb) {
1111                 rc = -EIO;
1112                 goto error;
1113         }
1114
1115         return nfc_tm_data_received(dev->nfc_dev, skb);
1116
1117 error:
1118         nfc_tm_deactivated(dev->nfc_dev);
1119         dev->tgt_mode = 0;
1120         skb_queue_purge(&dev->resp_q);
1121         dev_kfree_skb(resp);
1122
1123         return rc;
1124 }
1125
1126 static void pn533_wq_tm_mi_recv(struct work_struct *work)
1127 {
1128         struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work);
1129         struct sk_buff *skb;
1130         int rc;
1131
1132         dev_dbg(dev->dev, "%s\n", __func__);
1133
1134         skb = pn533_alloc_skb(dev, 0);
1135         if (!skb)
1136                 return;
1137
1138         rc = pn533_send_cmd_direct_async(dev,
1139                                         PN533_CMD_TG_GET_DATA,
1140                                         skb,
1141                                         pn533_tm_get_data_complete,
1142                                         NULL);
1143
1144         if (rc < 0)
1145                 dev_kfree_skb(skb);
1146 }
1147
1148 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
1149                                   struct sk_buff *resp);
1150 static void pn533_wq_tm_mi_send(struct work_struct *work)
1151 {
1152         struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work);
1153         struct sk_buff *skb;
1154         int rc;
1155
1156         dev_dbg(dev->dev, "%s\n", __func__);
1157
1158         /* Grab the first skb in the queue */
1159         skb = skb_dequeue(&dev->fragment_skb);
1160         if (skb == NULL) {      /* No more data */
1161                 /* Reset the queue for future use */
1162                 skb_queue_head_init(&dev->fragment_skb);
1163                 goto error;
1164         }
1165
1166         /* last entry - remove MI bit */
1167         if (skb_queue_len(&dev->fragment_skb) == 0) {
1168                 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
1169                                         skb, pn533_tm_send_complete, NULL);
1170         } else
1171                 rc = pn533_send_cmd_direct_async(dev,
1172                                         PN533_CMD_TG_SET_META_DATA,
1173                                         skb, pn533_tm_send_complete, NULL);
1174
1175         if (rc == 0) /* success */
1176                 return;
1177
1178         dev_err(dev->dev,
1179                 "Error %d when trying to perform set meta data_exchange", rc);
1180
1181         dev_kfree_skb(skb);
1182
1183 error:
1184         dev->phy_ops->send_ack(dev, GFP_KERNEL);
1185         queue_work(dev->wq, &dev->cmd_work);
1186 }
1187
1188 static void pn533_wq_tg_get_data(struct work_struct *work)
1189 {
1190         struct pn533 *dev = container_of(work, struct pn533, tg_work);
1191         struct sk_buff *skb;
1192         int rc;
1193
1194         dev_dbg(dev->dev, "%s\n", __func__);
1195
1196         skb = pn533_alloc_skb(dev, 0);
1197         if (!skb)
1198                 return;
1199
1200         rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1201                                    pn533_tm_get_data_complete, NULL);
1202
1203         if (rc < 0)
1204                 dev_kfree_skb(skb);
1205 }
1206
1207 #define ATR_REQ_GB_OFFSET 17
1208 static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1209 {
1210         u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1211         size_t gb_len;
1212         int rc;
1213
1214         dev_dbg(dev->dev, "%s\n", __func__);
1215
1216         if (resp->len < ATR_REQ_GB_OFFSET + 1)
1217                 return -EINVAL;
1218
1219         mode = resp->data[0];
1220         cmd = &resp->data[1];
1221
1222         dev_dbg(dev->dev, "Target mode 0x%x len %d\n",
1223                 mode, resp->len);
1224
1225         if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1226             PN533_INIT_TARGET_RESP_ACTIVE)
1227                 comm_mode = NFC_COMM_ACTIVE;
1228
1229         if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0)  /* Only DEP supported */
1230                 return -EOPNOTSUPP;
1231
1232         gb = cmd + ATR_REQ_GB_OFFSET;
1233         gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1234
1235         rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1236                               comm_mode, gb, gb_len);
1237         if (rc < 0) {
1238                 nfc_err(dev->dev,
1239                         "Error when signaling target activation\n");
1240                 return rc;
1241         }
1242
1243         dev->tgt_mode = 1;
1244         queue_work(dev->wq, &dev->tg_work);
1245
1246         return 0;
1247 }
1248
1249 static void pn533_listen_mode_timer(struct timer_list *t)
1250 {
1251         struct pn533 *dev = from_timer(dev, t, listen_timer);
1252
1253         dev_dbg(dev->dev, "Listen mode timeout\n");
1254
1255         dev->cancel_listen = 1;
1256
1257         pn533_poll_next_mod(dev);
1258
1259         queue_delayed_work(dev->wq, &dev->poll_work,
1260                            msecs_to_jiffies(PN533_POLL_INTERVAL));
1261 }
1262
1263 static int pn533_rf_complete(struct pn533 *dev, void *arg,
1264                              struct sk_buff *resp)
1265 {
1266         int rc = 0;
1267
1268         dev_dbg(dev->dev, "%s\n", __func__);
1269
1270         if (IS_ERR(resp)) {
1271                 rc = PTR_ERR(resp);
1272
1273                 nfc_err(dev->dev, "RF setting error %d\n", rc);
1274
1275                 return rc;
1276         }
1277
1278         queue_delayed_work(dev->wq, &dev->poll_work,
1279                            msecs_to_jiffies(PN533_POLL_INTERVAL));
1280
1281         dev_kfree_skb(resp);
1282         return rc;
1283 }
1284
1285 static void pn533_wq_rf(struct work_struct *work)
1286 {
1287         struct pn533 *dev = container_of(work, struct pn533, rf_work);
1288         struct sk_buff *skb;
1289         int rc;
1290
1291         dev_dbg(dev->dev, "%s\n", __func__);
1292
1293         skb = pn533_alloc_skb(dev, 2);
1294         if (!skb)
1295                 return;
1296
1297         skb_put_u8(skb, PN533_CFGITEM_RF_FIELD);
1298         skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA);
1299
1300         rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1301                                   pn533_rf_complete, NULL);
1302         if (rc < 0) {
1303                 dev_kfree_skb(skb);
1304                 nfc_err(dev->dev, "RF setting error %d\n", rc);
1305         }
1306 }
1307
1308 static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
1309                                    struct sk_buff *resp)
1310 {
1311         struct pn533_cmd_jump_dep_response *rsp;
1312         struct nfc_target nfc_target;
1313         u8 target_gt_len;
1314         int rc;
1315
1316         if (IS_ERR(resp))
1317                 return PTR_ERR(resp);
1318
1319         rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1320
1321         rc = rsp->status & PN533_CMD_RET_MASK;
1322         if (rc != PN533_CMD_RET_SUCCESS) {
1323                 /* Not target found, turn radio off */
1324                 queue_work(dev->wq, &dev->rf_work);
1325
1326                 dev_kfree_skb(resp);
1327                 return 0;
1328         }
1329
1330         dev_dbg(dev->dev, "Creating new target");
1331
1332         nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1333         nfc_target.nfcid1_len = 10;
1334         memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1335         rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1336         if (rc)
1337                 goto error;
1338
1339         dev->tgt_available_prots = 0;
1340         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1341
1342         /* ATR_RES general bytes are located at offset 17 */
1343         target_gt_len = resp->len - 17;
1344         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1345                                           rsp->gt, target_gt_len);
1346         if (!rc) {
1347                 rc = nfc_dep_link_is_up(dev->nfc_dev,
1348                                         dev->nfc_dev->targets[0].idx,
1349                                         0, NFC_RF_INITIATOR);
1350
1351                 if (!rc)
1352                         pn533_poll_reset_mod_list(dev);
1353         }
1354 error:
1355         dev_kfree_skb(resp);
1356         return rc;
1357 }
1358
1359 #define PASSIVE_DATA_LEN 5
1360 static int pn533_poll_dep(struct nfc_dev *nfc_dev)
1361 {
1362         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1363         struct sk_buff *skb;
1364         int rc, skb_len;
1365         u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
1366         u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1367
1368         dev_dbg(dev->dev, "%s", __func__);
1369
1370         if (!dev->gb) {
1371                 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1372
1373                 if (!dev->gb || !dev->gb_len) {
1374                         dev->poll_dep = 0;
1375                         queue_work(dev->wq, &dev->rf_work);
1376                 }
1377         }
1378
1379         skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
1380         skb_len += PASSIVE_DATA_LEN;
1381
1382         /* NFCID3 */
1383         skb_len += NFC_NFCID3_MAXSIZE;
1384         nfcid3[0] = 0x1;
1385         nfcid3[1] = 0xfe;
1386         get_random_bytes(nfcid3 + 2, 6);
1387
1388         skb = pn533_alloc_skb(dev, skb_len);
1389         if (!skb)
1390                 return -ENOMEM;
1391
1392         skb_put_u8(skb, 0x01);  /* Active */
1393         skb_put_u8(skb, 0x02);  /* 424 kbps */
1394
1395         next = skb_put(skb, 1);  /* Next */
1396         *next = 0;
1397
1398         /* Copy passive data */
1399         skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
1400         *next |= 1;
1401
1402         /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1403         skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
1404         *next |= 2;
1405
1406         skb_put_data(skb, dev->gb, dev->gb_len);
1407         *next |= 4; /* We have some Gi */
1408
1409         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1410                                   pn533_poll_dep_complete, NULL);
1411
1412         if (rc < 0)
1413                 dev_kfree_skb(skb);
1414
1415         return rc;
1416 }
1417
1418 static int pn533_autopoll_complete(struct pn533 *dev, void *arg,
1419                                struct sk_buff *resp)
1420 {
1421         struct pn532_autopoll_resp *apr;
1422         struct nfc_target nfc_tgt;
1423         u8 nbtg;
1424         int rc;
1425
1426         if (IS_ERR(resp)) {
1427                 rc = PTR_ERR(resp);
1428
1429                 nfc_err(dev->dev, "%s  autopoll complete error %d\n",
1430                         __func__, rc);
1431
1432                 if (rc == -ENOENT) {
1433                         if (dev->poll_mod_count != 0)
1434                                 return rc;
1435                         goto stop_poll;
1436                 } else if (rc < 0) {
1437                         nfc_err(dev->dev,
1438                                 "Error %d when running autopoll\n", rc);
1439                         goto stop_poll;
1440                 }
1441         }
1442
1443         nbtg = resp->data[0];
1444         if ((nbtg > 2) || (nbtg <= 0))
1445                 return -EAGAIN;
1446
1447         apr = (struct pn532_autopoll_resp *)&resp->data[1];
1448         while (nbtg--) {
1449                 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1450                 switch (apr->type) {
1451                 case PN532_AUTOPOLL_TYPE_ISOA:
1452                         dev_dbg(dev->dev, "ISOA\n");
1453                         rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
1454                                                        apr->ln - 1);
1455                         break;
1456                 case PN532_AUTOPOLL_TYPE_FELICA212:
1457                 case PN532_AUTOPOLL_TYPE_FELICA424:
1458                         dev_dbg(dev->dev, "FELICA\n");
1459                         rc = pn533_target_found_felica(&nfc_tgt, apr->tgdata,
1460                                                        apr->ln - 1);
1461                         break;
1462                 case PN532_AUTOPOLL_TYPE_JEWEL:
1463                         dev_dbg(dev->dev, "JEWEL\n");
1464                         rc = pn533_target_found_jewel(&nfc_tgt, apr->tgdata,
1465                                                       apr->ln - 1);
1466                         break;
1467                 case PN532_AUTOPOLL_TYPE_ISOB:
1468                         dev_dbg(dev->dev, "ISOB\n");
1469                         rc = pn533_target_found_type_b(&nfc_tgt, apr->tgdata,
1470                                                        apr->ln - 1);
1471                         break;
1472                 case PN532_AUTOPOLL_TYPE_MIFARE:
1473                         dev_dbg(dev->dev, "Mifare\n");
1474                         rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
1475                                                        apr->ln - 1);
1476                         break;
1477                 default:
1478                         nfc_err(dev->dev,
1479                                     "Unknown current poll modulation\n");
1480                         rc = -EPROTO;
1481                 }
1482
1483                 if (rc)
1484                         goto done;
1485
1486                 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1487                         nfc_err(dev->dev,
1488                                     "The Tg found doesn't have the desired protocol\n");
1489                         rc = -EAGAIN;
1490                         goto done;
1491                 }
1492
1493                 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1494                 apr = (struct pn532_autopoll_resp *)
1495                         (apr->tgdata + (apr->ln - 1));
1496         }
1497
1498         pn533_poll_reset_mod_list(dev);
1499         nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1500
1501 done:
1502         dev_kfree_skb(resp);
1503         return rc;
1504
1505 stop_poll:
1506         nfc_err(dev->dev, "autopoll operation has been stopped\n");
1507
1508         pn533_poll_reset_mod_list(dev);
1509         dev->poll_protocols = 0;
1510         return rc;
1511 }
1512
1513 static int pn533_poll_complete(struct pn533 *dev, void *arg,
1514                                struct sk_buff *resp)
1515 {
1516         struct pn533_poll_modulations *cur_mod;
1517         int rc;
1518
1519         dev_dbg(dev->dev, "%s\n", __func__);
1520
1521         if (IS_ERR(resp)) {
1522                 rc = PTR_ERR(resp);
1523
1524                 nfc_err(dev->dev, "%s  Poll complete error %d\n",
1525                         __func__, rc);
1526
1527                 if (rc == -ENOENT) {
1528                         if (dev->poll_mod_count != 0)
1529                                 return rc;
1530                         goto stop_poll;
1531                 } else if (rc < 0) {
1532                         nfc_err(dev->dev,
1533                                 "Error %d when running poll\n", rc);
1534                         goto stop_poll;
1535                 }
1536         }
1537
1538         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1539
1540         if (cur_mod->len == 0) { /* Target mode */
1541                 del_timer(&dev->listen_timer);
1542                 rc = pn533_init_target_complete(dev, resp);
1543                 goto done;
1544         }
1545
1546         /* Initiator mode */
1547         rc = pn533_start_poll_complete(dev, resp);
1548         if (!rc)
1549                 goto done;
1550
1551         if (!dev->poll_mod_count) {
1552                 dev_dbg(dev->dev, "Polling has been stopped\n");
1553                 goto done;
1554         }
1555
1556         pn533_poll_next_mod(dev);
1557         /* Not target found, turn radio off */
1558         queue_work(dev->wq, &dev->rf_work);
1559
1560 done:
1561         dev_kfree_skb(resp);
1562         return rc;
1563
1564 stop_poll:
1565         nfc_err(dev->dev, "Polling operation has been stopped\n");
1566
1567         pn533_poll_reset_mod_list(dev);
1568         dev->poll_protocols = 0;
1569         return rc;
1570 }
1571
1572 static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1573                                         struct pn533_poll_modulations *mod)
1574 {
1575         struct sk_buff *skb;
1576
1577         skb = pn533_alloc_skb(dev, mod->len);
1578         if (!skb)
1579                 return NULL;
1580
1581         skb_put_data(skb, &mod->data, mod->len);
1582
1583         return skb;
1584 }
1585
1586 static int pn533_send_poll_frame(struct pn533 *dev)
1587 {
1588         struct pn533_poll_modulations *mod;
1589         struct sk_buff *skb;
1590         int rc;
1591         u8 cmd_code;
1592
1593         mod = dev->poll_mod_active[dev->poll_mod_curr];
1594
1595         dev_dbg(dev->dev, "%s mod len %d\n",
1596                 __func__, mod->len);
1597
1598         if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep)  {
1599                 dev->poll_dep = 0;
1600                 return pn533_poll_dep(dev->nfc_dev);
1601         }
1602
1603         if (mod->len == 0) {  /* Listen mode */
1604                 cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1605                 skb = pn533_alloc_poll_tg_frame(dev);
1606         } else {  /* Polling mode */
1607                 cmd_code =  PN533_CMD_IN_LIST_PASSIVE_TARGET;
1608                 skb = pn533_alloc_poll_in_frame(dev, mod);
1609         }
1610
1611         if (!skb) {
1612                 nfc_err(dev->dev, "Failed to allocate skb\n");
1613                 return -ENOMEM;
1614         }
1615
1616         rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1617                                   NULL);
1618         if (rc < 0) {
1619                 dev_kfree_skb(skb);
1620                 nfc_err(dev->dev, "Polling loop error %d\n", rc);
1621         }
1622
1623         return rc;
1624 }
1625
1626 static void pn533_wq_poll(struct work_struct *work)
1627 {
1628         struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
1629         struct pn533_poll_modulations *cur_mod;
1630         int rc;
1631
1632         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1633
1634         dev_dbg(dev->dev,
1635                 "%s cancel_listen %d modulation len %d\n",
1636                 __func__, dev->cancel_listen, cur_mod->len);
1637
1638         if (dev->cancel_listen == 1) {
1639                 dev->cancel_listen = 0;
1640                 dev->phy_ops->abort_cmd(dev, GFP_ATOMIC);
1641         }
1642
1643         rc = pn533_send_poll_frame(dev);
1644         if (rc)
1645                 return;
1646
1647         if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1648                 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1649 }
1650
1651 static int pn533_start_poll(struct nfc_dev *nfc_dev,
1652                             u32 im_protocols, u32 tm_protocols)
1653 {
1654         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1655         struct pn533_poll_modulations *cur_mod;
1656         struct sk_buff *skb;
1657         u8 rand_mod;
1658         int rc;
1659
1660         dev_dbg(dev->dev,
1661                 "%s: im protocols 0x%x tm protocols 0x%x\n",
1662                 __func__, im_protocols, tm_protocols);
1663
1664         if (dev->tgt_active_prot) {
1665                 nfc_err(dev->dev,
1666                         "Cannot poll with a target already activated\n");
1667                 return -EBUSY;
1668         }
1669
1670         if (dev->tgt_mode) {
1671                 nfc_err(dev->dev,
1672                         "Cannot poll while already being activated\n");
1673                 return -EBUSY;
1674         }
1675
1676         if (tm_protocols) {
1677                 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1678                 if (dev->gb == NULL)
1679                         tm_protocols = 0;
1680         }
1681
1682         dev->poll_protocols = im_protocols;
1683         dev->listen_protocols = tm_protocols;
1684         if (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL) {
1685                 skb = pn533_alloc_skb(dev, 4 + 6);
1686                 if (!skb)
1687                         return -ENOMEM;
1688
1689                 *((u8 *)skb_put(skb, sizeof(u8))) =
1690                         PN532_AUTOPOLL_POLLNR_INFINITE;
1691                 *((u8 *)skb_put(skb, sizeof(u8))) = PN532_AUTOPOLL_PERIOD;
1692
1693                 if ((im_protocols & NFC_PROTO_MIFARE_MASK) &&
1694                                 (im_protocols & NFC_PROTO_ISO14443_MASK) &&
1695                                 (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1696                         *((u8 *)skb_put(skb, sizeof(u8))) =
1697                                 PN532_AUTOPOLL_TYPE_GENERIC_106;
1698                 else {
1699                         if (im_protocols & NFC_PROTO_MIFARE_MASK)
1700                                 *((u8 *)skb_put(skb, sizeof(u8))) =
1701                                         PN532_AUTOPOLL_TYPE_MIFARE;
1702
1703                         if (im_protocols & NFC_PROTO_ISO14443_MASK)
1704                                 *((u8 *)skb_put(skb, sizeof(u8))) =
1705                                         PN532_AUTOPOLL_TYPE_ISOA;
1706
1707                         if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1708                                 *((u8 *)skb_put(skb, sizeof(u8))) =
1709                                         PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106;
1710                                 *((u8 *)skb_put(skb, sizeof(u8))) =
1711                                         PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212;
1712                                 *((u8 *)skb_put(skb, sizeof(u8))) =
1713                                         PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424;
1714                         }
1715                 }
1716
1717                 if (im_protocols & NFC_PROTO_FELICA_MASK ||
1718                                 im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1719                         *((u8 *)skb_put(skb, sizeof(u8))) =
1720                                 PN532_AUTOPOLL_TYPE_FELICA212;
1721                         *((u8 *)skb_put(skb, sizeof(u8))) =
1722                                 PN532_AUTOPOLL_TYPE_FELICA424;
1723                 }
1724
1725                 if (im_protocols & NFC_PROTO_JEWEL_MASK)
1726                         *((u8 *)skb_put(skb, sizeof(u8))) =
1727                                 PN532_AUTOPOLL_TYPE_JEWEL;
1728
1729                 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1730                         *((u8 *)skb_put(skb, sizeof(u8))) =
1731                                 PN532_AUTOPOLL_TYPE_ISOB;
1732
1733                 if (tm_protocols)
1734                         *((u8 *)skb_put(skb, sizeof(u8))) =
1735                                 PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106;
1736
1737                 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_AUTOPOLL, skb,
1738                                 pn533_autopoll_complete, NULL);
1739
1740                 if (rc < 0)
1741                         dev_kfree_skb(skb);
1742                 else
1743                         dev->poll_mod_count++;
1744
1745                 return rc;
1746         }
1747
1748         pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1749
1750         /* Do not always start polling from the same modulation */
1751         get_random_bytes(&rand_mod, sizeof(rand_mod));
1752         rand_mod %= dev->poll_mod_count;
1753         dev->poll_mod_curr = rand_mod;
1754
1755         cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1756
1757         rc = pn533_send_poll_frame(dev);
1758
1759         /* Start listen timer */
1760         if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
1761                 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1762
1763         return rc;
1764 }
1765
1766 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1767 {
1768         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1769
1770         del_timer(&dev->listen_timer);
1771
1772         if (!dev->poll_mod_count) {
1773                 dev_dbg(dev->dev,
1774                         "Polling operation was not running\n");
1775                 return;
1776         }
1777
1778         dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
1779         flush_delayed_work(&dev->poll_work);
1780         pn533_poll_reset_mod_list(dev);
1781 }
1782
1783 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1784 {
1785         struct pn533_cmd_activate_response *rsp;
1786         u16 gt_len;
1787         int rc;
1788         struct sk_buff *skb;
1789         struct sk_buff *resp;
1790
1791         dev_dbg(dev->dev, "%s\n", __func__);
1792
1793         skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1794         if (!skb)
1795                 return -ENOMEM;
1796
1797         skb_put_u8(skb, 1); /* TG */
1798         skb_put_u8(skb, 0); /* Next */
1799
1800         resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1801         if (IS_ERR(resp))
1802                 return PTR_ERR(resp);
1803
1804         rsp = (struct pn533_cmd_activate_response *)resp->data;
1805         rc = rsp->status & PN533_CMD_RET_MASK;
1806         if (rc != PN533_CMD_RET_SUCCESS) {
1807                 nfc_err(dev->dev,
1808                         "Target activation failed (error 0x%x)\n", rc);
1809                 dev_kfree_skb(resp);
1810                 return -EIO;
1811         }
1812
1813         /* ATR_RES general bytes are located at offset 16 */
1814         gt_len = resp->len - 16;
1815         rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1816
1817         dev_kfree_skb(resp);
1818         return rc;
1819 }
1820
1821 static int pn533_activate_target(struct nfc_dev *nfc_dev,
1822                                  struct nfc_target *target, u32 protocol)
1823 {
1824         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1825         int rc;
1826
1827         dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol);
1828
1829         if (dev->poll_mod_count) {
1830                 nfc_err(dev->dev,
1831                         "Cannot activate while polling\n");
1832                 return -EBUSY;
1833         }
1834
1835         if (dev->tgt_active_prot) {
1836                 nfc_err(dev->dev,
1837                         "There is already an active target\n");
1838                 return -EBUSY;
1839         }
1840
1841         if (!dev->tgt_available_prots) {
1842                 nfc_err(dev->dev,
1843                         "There is no available target to activate\n");
1844                 return -EINVAL;
1845         }
1846
1847         if (!(dev->tgt_available_prots & (1 << protocol))) {
1848                 nfc_err(dev->dev,
1849                         "Target doesn't support requested proto %u\n",
1850                         protocol);
1851                 return -EINVAL;
1852         }
1853
1854         if (protocol == NFC_PROTO_NFC_DEP) {
1855                 rc = pn533_activate_target_nfcdep(dev);
1856                 if (rc) {
1857                         nfc_err(dev->dev,
1858                                 "Activating target with DEP failed %d\n", rc);
1859                         return rc;
1860                 }
1861         }
1862
1863         dev->tgt_active_prot = protocol;
1864         dev->tgt_available_prots = 0;
1865
1866         return 0;
1867 }
1868
1869 static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg,
1870                              struct sk_buff *resp)
1871 {
1872         int rc = 0;
1873
1874         dev_dbg(dev->dev, "%s\n", __func__);
1875
1876         if (IS_ERR(resp)) {
1877                 rc = PTR_ERR(resp);
1878
1879                 nfc_err(dev->dev, "Target release error %d\n", rc);
1880
1881                 return rc;
1882         }
1883
1884         rc = resp->data[0] & PN533_CMD_RET_MASK;
1885         if (rc != PN533_CMD_RET_SUCCESS)
1886                 nfc_err(dev->dev,
1887                         "Error 0x%x when releasing the target\n", rc);
1888
1889         dev_kfree_skb(resp);
1890         return rc;
1891 }
1892
1893 static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1894                                     struct nfc_target *target, u8 mode)
1895 {
1896         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1897         struct sk_buff *skb;
1898         int rc;
1899
1900         dev_dbg(dev->dev, "%s\n", __func__);
1901
1902         if (!dev->tgt_active_prot) {
1903                 nfc_err(dev->dev, "There is no active target\n");
1904                 return;
1905         }
1906
1907         dev->tgt_active_prot = 0;
1908         skb_queue_purge(&dev->resp_q);
1909
1910         skb = pn533_alloc_skb(dev, sizeof(u8));
1911         if (!skb)
1912                 return;
1913
1914         skb_put_u8(skb, 1); /* TG*/
1915
1916         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
1917                                   pn533_deactivate_target_complete, NULL);
1918         if (rc < 0) {
1919                 dev_kfree_skb(skb);
1920                 nfc_err(dev->dev, "Target release error %d\n", rc);
1921         }
1922 }
1923
1924
1925 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1926                                          struct sk_buff *resp)
1927 {
1928         struct pn533_cmd_jump_dep_response *rsp;
1929         u8 target_gt_len;
1930         int rc;
1931         u8 active = *(u8 *)arg;
1932
1933         kfree(arg);
1934
1935         if (IS_ERR(resp))
1936                 return PTR_ERR(resp);
1937
1938         if (dev->tgt_available_prots &&
1939             !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1940                 nfc_err(dev->dev,
1941                         "The target does not support DEP\n");
1942                 rc =  -EINVAL;
1943                 goto error;
1944         }
1945
1946         rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1947
1948         rc = rsp->status & PN533_CMD_RET_MASK;
1949         if (rc != PN533_CMD_RET_SUCCESS) {
1950                 nfc_err(dev->dev,
1951                         "Bringing DEP link up failed (error 0x%x)\n", rc);
1952                 goto error;
1953         }
1954
1955         if (!dev->tgt_available_prots) {
1956                 struct nfc_target nfc_target;
1957
1958                 dev_dbg(dev->dev, "Creating new target\n");
1959
1960                 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1961                 nfc_target.nfcid1_len = 10;
1962                 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1963                 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1964                 if (rc)
1965                         goto error;
1966
1967                 dev->tgt_available_prots = 0;
1968         }
1969
1970         dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1971
1972         /* ATR_RES general bytes are located at offset 17 */
1973         target_gt_len = resp->len - 17;
1974         rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1975                                           rsp->gt, target_gt_len);
1976         if (rc == 0)
1977                 rc = nfc_dep_link_is_up(dev->nfc_dev,
1978                                         dev->nfc_dev->targets[0].idx,
1979                                         !active, NFC_RF_INITIATOR);
1980
1981 error:
1982         dev_kfree_skb(resp);
1983         return rc;
1984 }
1985
1986 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
1987 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1988                              u8 comm_mode, u8 *gb, size_t gb_len)
1989 {
1990         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1991         struct sk_buff *skb;
1992         int rc, skb_len;
1993         u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
1994         u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1995
1996         dev_dbg(dev->dev, "%s\n", __func__);
1997
1998         if (dev->poll_mod_count) {
1999                 nfc_err(dev->dev,
2000                         "Cannot bring the DEP link up while polling\n");
2001                 return -EBUSY;
2002         }
2003
2004         if (dev->tgt_active_prot) {
2005                 nfc_err(dev->dev,
2006                         "There is already an active target\n");
2007                 return -EBUSY;
2008         }
2009
2010         skb_len = 3 + gb_len; /* ActPass + BR + Next */
2011         skb_len += PASSIVE_DATA_LEN;
2012
2013         /* NFCID3 */
2014         skb_len += NFC_NFCID3_MAXSIZE;
2015         if (target && !target->nfcid2_len) {
2016                 nfcid3[0] = 0x1;
2017                 nfcid3[1] = 0xfe;
2018                 get_random_bytes(nfcid3 + 2, 6);
2019         }
2020
2021         skb = pn533_alloc_skb(dev, skb_len);
2022         if (!skb)
2023                 return -ENOMEM;
2024
2025         skb_put_u8(skb, !comm_mode);  /* ActPass */
2026         skb_put_u8(skb, 0x02);  /* 424 kbps */
2027
2028         next = skb_put(skb, 1);  /* Next */
2029         *next = 0;
2030
2031         /* Copy passive data */
2032         skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
2033         *next |= 1;
2034
2035         /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
2036         if (target && target->nfcid2_len)
2037                 memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2038                        target->nfcid2_len);
2039         else
2040                 skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
2041         *next |= 2;
2042
2043         if (gb != NULL && gb_len > 0) {
2044                 skb_put_data(skb, gb, gb_len);
2045                 *next |= 4; /* We have some Gi */
2046         } else {
2047                 *next = 0;
2048         }
2049
2050         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2051         if (!arg) {
2052                 dev_kfree_skb(skb);
2053                 return -ENOMEM;
2054         }
2055
2056         *arg = !comm_mode;
2057
2058         pn533_rf_field(dev->nfc_dev, 0);
2059
2060         rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2061                                   pn533_in_dep_link_up_complete, arg);
2062
2063         if (rc < 0) {
2064                 dev_kfree_skb(skb);
2065                 kfree(arg);
2066         }
2067
2068         return rc;
2069 }
2070
2071 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2072 {
2073         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2074
2075         dev_dbg(dev->dev, "%s\n", __func__);
2076
2077         pn533_poll_reset_mod_list(dev);
2078
2079         if (dev->tgt_mode || dev->tgt_active_prot)
2080                 dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
2081
2082         dev->tgt_active_prot = 0;
2083         dev->tgt_mode = 0;
2084
2085         skb_queue_purge(&dev->resp_q);
2086
2087         return 0;
2088 }
2089
2090 struct pn533_data_exchange_arg {
2091         data_exchange_cb_t cb;
2092         void *cb_context;
2093 };
2094
2095 static struct sk_buff *pn533_build_response(struct pn533 *dev)
2096 {
2097         struct sk_buff *skb, *tmp, *t;
2098         unsigned int skb_len = 0, tmp_len = 0;
2099
2100         dev_dbg(dev->dev, "%s\n", __func__);
2101
2102         if (skb_queue_empty(&dev->resp_q))
2103                 return NULL;
2104
2105         if (skb_queue_len(&dev->resp_q) == 1) {
2106                 skb = skb_dequeue(&dev->resp_q);
2107                 goto out;
2108         }
2109
2110         skb_queue_walk_safe(&dev->resp_q, tmp, t)
2111                 skb_len += tmp->len;
2112
2113         dev_dbg(dev->dev, "%s total length %d\n",
2114                 __func__, skb_len);
2115
2116         skb = alloc_skb(skb_len, GFP_KERNEL);
2117         if (skb == NULL)
2118                 goto out;
2119
2120         skb_put(skb, skb_len);
2121
2122         skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2123                 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2124                 tmp_len += tmp->len;
2125         }
2126
2127 out:
2128         skb_queue_purge(&dev->resp_q);
2129
2130         return skb;
2131 }
2132
2133 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2134                                         struct sk_buff *resp)
2135 {
2136         struct pn533_data_exchange_arg *arg = _arg;
2137         struct sk_buff *skb;
2138         int rc = 0;
2139         u8 status, ret, mi;
2140
2141         dev_dbg(dev->dev, "%s\n", __func__);
2142
2143         if (IS_ERR(resp)) {
2144                 rc = PTR_ERR(resp);
2145                 goto _error;
2146         }
2147
2148         status = resp->data[0];
2149         ret = status & PN533_CMD_RET_MASK;
2150         mi = status & PN533_CMD_MI_MASK;
2151
2152         skb_pull(resp, sizeof(status));
2153
2154         if (ret != PN533_CMD_RET_SUCCESS) {
2155                 nfc_err(dev->dev,
2156                         "Exchanging data failed (error 0x%x)\n", ret);
2157                 rc = -EIO;
2158                 goto error;
2159         }
2160
2161         skb_queue_tail(&dev->resp_q, resp);
2162
2163         if (mi) {
2164                 dev->cmd_complete_mi_arg = arg;
2165                 queue_work(dev->wq, &dev->mi_rx_work);
2166                 return -EINPROGRESS;
2167         }
2168
2169         /* Prepare for the next round */
2170         if (skb_queue_len(&dev->fragment_skb) > 0) {
2171                 dev->cmd_complete_dep_arg = arg;
2172                 queue_work(dev->wq, &dev->mi_tx_work);
2173
2174                 return -EINPROGRESS;
2175         }
2176
2177         skb = pn533_build_response(dev);
2178         if (!skb) {
2179                 rc = -ENOMEM;
2180                 goto error;
2181         }
2182
2183         arg->cb(arg->cb_context, skb, 0);
2184         kfree(arg);
2185         return 0;
2186
2187 error:
2188         dev_kfree_skb(resp);
2189 _error:
2190         skb_queue_purge(&dev->resp_q);
2191         arg->cb(arg->cb_context, NULL, rc);
2192         kfree(arg);
2193         return rc;
2194 }
2195
2196 /*
2197  * Receive an incoming pn533 frame. skb contains only header and payload.
2198  * If skb == NULL, it is a notification that the link below is dead.
2199  */
2200 void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status)
2201 {
2202         if (!dev->cmd)
2203                 goto sched_wq;
2204
2205         dev->cmd->status = status;
2206
2207         if (status != 0) {
2208                 dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status);
2209                 goto sched_wq;
2210         }
2211
2212         if (skb == NULL) {
2213                 pr_err("NULL Frame -> link is dead\n");
2214                 goto sched_wq;
2215         }
2216
2217         if (pn533_rx_frame_is_ack(skb->data)) {
2218                 dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__);
2219                 dev_kfree_skb(skb);
2220                 return;
2221         }
2222
2223         print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
2224                              dev->ops->rx_frame_size(skb->data), false);
2225
2226         if (!dev->ops->rx_is_frame_valid(skb->data, dev)) {
2227                 nfc_err(dev->dev, "Received an invalid frame\n");
2228                 dev->cmd->status = -EIO;
2229         } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) {
2230                 nfc_err(dev->dev, "It it not the response to the last command\n");
2231                 dev->cmd->status = -EIO;
2232         }
2233
2234         dev->cmd->resp = skb;
2235
2236 sched_wq:
2237         queue_work(dev->wq, &dev->cmd_complete_work);
2238 }
2239 EXPORT_SYMBOL(pn533_recv_frame);
2240
2241 /* Split the Tx skb into small chunks */
2242 static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2243 {
2244         struct sk_buff *frag;
2245         int  frag_size;
2246
2247         do {
2248                 /* Remaining size */
2249                 if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2250                         frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2251                 else
2252                         frag_size = skb->len;
2253
2254                 /* Allocate and reserve */
2255                 frag = pn533_alloc_skb(dev, frag_size);
2256                 if (!frag) {
2257                         skb_queue_purge(&dev->fragment_skb);
2258                         break;
2259                 }
2260
2261                 if (!dev->tgt_mode) {
2262                         /* Reserve the TG/MI byte */
2263                         skb_reserve(frag, 1);
2264
2265                         /* MI + TG */
2266                         if (frag_size  == PN533_CMD_DATAFRAME_MAXLEN)
2267                                 *(u8 *)skb_push(frag, sizeof(u8)) =
2268                                                 (PN533_CMD_MI_MASK | 1);
2269                         else
2270                                 *(u8 *)skb_push(frag, sizeof(u8)) =  1; /* TG */
2271                 }
2272
2273                 skb_put_data(frag, skb->data, frag_size);
2274
2275                 /* Reduce the size of incoming buffer */
2276                 skb_pull(skb, frag_size);
2277
2278                 /* Add this to skb_queue */
2279                 skb_queue_tail(&dev->fragment_skb, frag);
2280
2281         } while (skb->len > 0);
2282
2283         dev_kfree_skb(skb);
2284
2285         return skb_queue_len(&dev->fragment_skb);
2286 }
2287
2288 static int pn533_transceive(struct nfc_dev *nfc_dev,
2289                             struct nfc_target *target, struct sk_buff *skb,
2290                             data_exchange_cb_t cb, void *cb_context)
2291 {
2292         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2293         struct pn533_data_exchange_arg *arg = NULL;
2294         int rc;
2295
2296         dev_dbg(dev->dev, "%s\n", __func__);
2297
2298         if (!dev->tgt_active_prot) {
2299                 nfc_err(dev->dev,
2300                         "Can't exchange data if there is no active target\n");
2301                 rc = -EINVAL;
2302                 goto error;
2303         }
2304
2305         arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2306         if (!arg) {
2307                 rc = -ENOMEM;
2308                 goto error;
2309         }
2310
2311         arg->cb = cb;
2312         arg->cb_context = cb_context;
2313
2314         switch (dev->device_type) {
2315         case PN533_DEVICE_PASORI:
2316                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2317                         rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2318                                                    skb,
2319                                                    pn533_data_exchange_complete,
2320                                                    arg);
2321
2322                         break;
2323                 }
2324                 fallthrough;
2325         default:
2326                 /* jumbo frame ? */
2327                 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2328                         rc = pn533_fill_fragment_skbs(dev, skb);
2329                         if (rc <= 0)
2330                                 goto error;
2331
2332                         skb = skb_dequeue(&dev->fragment_skb);
2333                         if (!skb) {
2334                                 rc = -EIO;
2335                                 goto error;
2336                         }
2337                 } else {
2338                         *(u8 *)skb_push(skb, sizeof(u8)) =  1; /* TG */
2339                 }
2340
2341                 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2342                                            skb, pn533_data_exchange_complete,
2343                                            arg);
2344
2345                 break;
2346         }
2347
2348         if (rc < 0) /* rc from send_async */
2349                 goto error;
2350
2351         return 0;
2352
2353 error:
2354         kfree(arg);
2355         dev_kfree_skb(skb);
2356         return rc;
2357 }
2358
2359 static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2360                                   struct sk_buff *resp)
2361 {
2362         u8 status;
2363
2364         dev_dbg(dev->dev, "%s\n", __func__);
2365
2366         if (IS_ERR(resp))
2367                 return PTR_ERR(resp);
2368
2369         status = resp->data[0];
2370
2371         /* Prepare for the next round */
2372         if (skb_queue_len(&dev->fragment_skb) > 0) {
2373                 queue_work(dev->wq, &dev->mi_tm_tx_work);
2374                 return -EINPROGRESS;
2375         }
2376         dev_kfree_skb(resp);
2377
2378         if (status != 0) {
2379                 nfc_tm_deactivated(dev->nfc_dev);
2380
2381                 dev->tgt_mode = 0;
2382
2383                 return 0;
2384         }
2385
2386         queue_work(dev->wq, &dev->tg_work);
2387
2388         return 0;
2389 }
2390
2391 static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2392 {
2393         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2394         int rc;
2395
2396         dev_dbg(dev->dev, "%s\n", __func__);
2397
2398         /* let's split in multiple chunks if size's too big */
2399         if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2400                 rc = pn533_fill_fragment_skbs(dev, skb);
2401                 if (rc <= 0)
2402                         goto error;
2403
2404                 /* get the first skb */
2405                 skb = skb_dequeue(&dev->fragment_skb);
2406                 if (!skb) {
2407                         rc = -EIO;
2408                         goto error;
2409                 }
2410
2411                 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
2412                                                 pn533_tm_send_complete, NULL);
2413         } else {
2414                 /* Send th skb */
2415                 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2416                                                 pn533_tm_send_complete, NULL);
2417         }
2418
2419 error:
2420         if (rc < 0) {
2421                 dev_kfree_skb(skb);
2422                 skb_queue_purge(&dev->fragment_skb);
2423         }
2424
2425         return rc;
2426 }
2427
2428 static void pn533_wq_mi_recv(struct work_struct *work)
2429 {
2430         struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
2431         struct sk_buff *skb;
2432         int rc;
2433
2434         dev_dbg(dev->dev, "%s\n", __func__);
2435
2436         skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2437         if (!skb)
2438                 goto error;
2439
2440         switch (dev->device_type) {
2441         case PN533_DEVICE_PASORI:
2442                 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2443                         rc = pn533_send_cmd_direct_async(dev,
2444                                                 PN533_CMD_IN_COMM_THRU,
2445                                                 skb,
2446                                                 pn533_data_exchange_complete,
2447                                                  dev->cmd_complete_mi_arg);
2448
2449                         break;
2450                 }
2451                 fallthrough;
2452         default:
2453                 skb_put_u8(skb, 1); /*TG*/
2454
2455                 rc = pn533_send_cmd_direct_async(dev,
2456                                                  PN533_CMD_IN_DATA_EXCHANGE,
2457                                                  skb,
2458                                                  pn533_data_exchange_complete,
2459                                                  dev->cmd_complete_mi_arg);
2460
2461                 break;
2462         }
2463
2464         if (rc == 0) /* success */
2465                 return;
2466
2467         nfc_err(dev->dev,
2468                 "Error %d when trying to perform data_exchange\n", rc);
2469
2470         dev_kfree_skb(skb);
2471         kfree(dev->cmd_complete_mi_arg);
2472
2473 error:
2474         dev->phy_ops->send_ack(dev, GFP_KERNEL);
2475         queue_work(dev->wq, &dev->cmd_work);
2476 }
2477
2478 static void pn533_wq_mi_send(struct work_struct *work)
2479 {
2480         struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2481         struct sk_buff *skb;
2482         int rc;
2483
2484         dev_dbg(dev->dev, "%s\n", __func__);
2485
2486         /* Grab the first skb in the queue */
2487         skb = skb_dequeue(&dev->fragment_skb);
2488
2489         if (skb == NULL) {      /* No more data */
2490                 /* Reset the queue for future use */
2491                 skb_queue_head_init(&dev->fragment_skb);
2492                 goto error;
2493         }
2494
2495         switch (dev->device_type) {
2496         case PN533_DEVICE_PASORI:
2497                 if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2498                         rc = -EIO;
2499                         break;
2500                 }
2501
2502                 rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2503                                                  skb,
2504                                                  pn533_data_exchange_complete,
2505                                                  dev->cmd_complete_dep_arg);
2506
2507                 break;
2508
2509         default:
2510                 /* Still some fragments? */
2511                 rc = pn533_send_cmd_direct_async(dev,
2512                                                  PN533_CMD_IN_DATA_EXCHANGE,
2513                                                  skb,
2514                                                  pn533_data_exchange_complete,
2515                                                  dev->cmd_complete_dep_arg);
2516
2517                 break;
2518         }
2519
2520         if (rc == 0) /* success */
2521                 return;
2522
2523         nfc_err(dev->dev,
2524                 "Error %d when trying to perform data_exchange\n", rc);
2525
2526         dev_kfree_skb(skb);
2527         kfree(dev->cmd_complete_dep_arg);
2528
2529 error:
2530         dev->phy_ops->send_ack(dev, GFP_KERNEL);
2531         queue_work(dev->wq, &dev->cmd_work);
2532 }
2533
2534 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2535                                                                 u8 cfgdata_len)
2536 {
2537         struct sk_buff *skb;
2538         struct sk_buff *resp;
2539         int skb_len;
2540
2541         dev_dbg(dev->dev, "%s\n", __func__);
2542
2543         skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2544
2545         skb = pn533_alloc_skb(dev, skb_len);
2546         if (!skb)
2547                 return -ENOMEM;
2548
2549         skb_put_u8(skb, cfgitem);
2550         skb_put_data(skb, cfgdata, cfgdata_len);
2551
2552         resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2553         if (IS_ERR(resp))
2554                 return PTR_ERR(resp);
2555
2556         dev_kfree_skb(resp);
2557         return 0;
2558 }
2559
2560 static int pn533_get_firmware_version(struct pn533 *dev,
2561                                       struct pn533_fw_version *fv)
2562 {
2563         struct sk_buff *skb;
2564         struct sk_buff *resp;
2565
2566         skb = pn533_alloc_skb(dev, 0);
2567         if (!skb)
2568                 return -ENOMEM;
2569
2570         resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2571         if (IS_ERR(resp))
2572                 return PTR_ERR(resp);
2573
2574         fv->ic = resp->data[0];
2575         fv->ver = resp->data[1];
2576         fv->rev = resp->data[2];
2577         fv->support = resp->data[3];
2578
2579         dev_kfree_skb(resp);
2580         return 0;
2581 }
2582
2583 static int pn533_pasori_fw_reset(struct pn533 *dev)
2584 {
2585         struct sk_buff *skb;
2586         struct sk_buff *resp;
2587
2588         dev_dbg(dev->dev, "%s\n", __func__);
2589
2590         skb = pn533_alloc_skb(dev, sizeof(u8));
2591         if (!skb)
2592                 return -ENOMEM;
2593
2594         skb_put_u8(skb, 0x1);
2595
2596         resp = pn533_send_cmd_sync(dev, 0x18, skb);
2597         if (IS_ERR(resp))
2598                 return PTR_ERR(resp);
2599
2600         dev_kfree_skb(resp);
2601
2602         return 0;
2603 }
2604
2605 static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2606 {
2607         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2608         u8 rf_field = !!rf;
2609         int rc;
2610
2611         rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2612
2613         rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2614                                      (u8 *)&rf_field, 1);
2615         if (rc) {
2616                 nfc_err(dev->dev, "Error on setting RF field\n");
2617                 return rc;
2618         }
2619
2620         return rc;
2621 }
2622
2623 static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
2624 {
2625         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2626         struct sk_buff *skb;
2627         struct sk_buff *resp;
2628
2629         skb = pn533_alloc_skb(dev, 1);
2630         if (!skb)
2631                 return -ENOMEM;
2632
2633         skb_put_u8(skb, 0x01);
2634
2635         resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
2636         if (IS_ERR(resp))
2637                 return PTR_ERR(resp);
2638
2639         dev_kfree_skb(resp);
2640         return 0;
2641 }
2642
2643 static int pn533_dev_up(struct nfc_dev *nfc_dev)
2644 {
2645         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2646         int rc;
2647
2648         if (dev->phy_ops->dev_up) {
2649                 rc = dev->phy_ops->dev_up(dev);
2650                 if (rc)
2651                         return rc;
2652         }
2653
2654         if ((dev->device_type == PN533_DEVICE_PN532) ||
2655                 (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) {
2656                 rc = pn532_sam_configuration(nfc_dev);
2657
2658                 if (rc)
2659                         return rc;
2660         }
2661
2662         return pn533_rf_field(nfc_dev, 1);
2663 }
2664
2665 static int pn533_dev_down(struct nfc_dev *nfc_dev)
2666 {
2667         struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2668         int ret;
2669
2670         ret = pn533_rf_field(nfc_dev, 0);
2671         if (dev->phy_ops->dev_down && !ret)
2672                 ret = dev->phy_ops->dev_down(dev);
2673
2674         return ret;
2675 }
2676
2677 static struct nfc_ops pn533_nfc_ops = {
2678         .dev_up = pn533_dev_up,
2679         .dev_down = pn533_dev_down,
2680         .dep_link_up = pn533_dep_link_up,
2681         .dep_link_down = pn533_dep_link_down,
2682         .start_poll = pn533_start_poll,
2683         .stop_poll = pn533_stop_poll,
2684         .activate_target = pn533_activate_target,
2685         .deactivate_target = pn533_deactivate_target,
2686         .im_transceive = pn533_transceive,
2687         .tm_send = pn533_tm_send,
2688 };
2689
2690 static int pn533_setup(struct pn533 *dev)
2691 {
2692         struct pn533_config_max_retries max_retries;
2693         struct pn533_config_timing timing;
2694         u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2695         int rc;
2696
2697         switch (dev->device_type) {
2698         case PN533_DEVICE_STD:
2699         case PN533_DEVICE_PASORI:
2700         case PN533_DEVICE_ACR122U:
2701         case PN533_DEVICE_PN532:
2702         case PN533_DEVICE_PN532_AUTOPOLL:
2703                 max_retries.mx_rty_atr = 0x2;
2704                 max_retries.mx_rty_psl = 0x1;
2705                 max_retries.mx_rty_passive_act =
2706                         PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2707
2708                 timing.rfu = PN533_CONFIG_TIMING_102;
2709                 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2710                 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2711
2712                 break;
2713
2714         default:
2715                 nfc_err(dev->dev, "Unknown device type %d\n",
2716                         dev->device_type);
2717                 return -EINVAL;
2718         }
2719
2720         rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2721                                      (u8 *)&max_retries, sizeof(max_retries));
2722         if (rc) {
2723                 nfc_err(dev->dev,
2724                         "Error on setting MAX_RETRIES config\n");
2725                 return rc;
2726         }
2727
2728
2729         rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2730                                      (u8 *)&timing, sizeof(timing));
2731         if (rc) {
2732                 nfc_err(dev->dev, "Error on setting RF timings\n");
2733                 return rc;
2734         }
2735
2736         switch (dev->device_type) {
2737         case PN533_DEVICE_STD:
2738         case PN533_DEVICE_PN532:
2739         case PN533_DEVICE_PN532_AUTOPOLL:
2740                 break;
2741
2742         case PN533_DEVICE_PASORI:
2743                 pn533_pasori_fw_reset(dev);
2744
2745                 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2746                                              pasori_cfg, 3);
2747                 if (rc) {
2748                         nfc_err(dev->dev,
2749                                 "Error while settings PASORI config\n");
2750                         return rc;
2751                 }
2752
2753                 pn533_pasori_fw_reset(dev);
2754
2755                 break;
2756         }
2757
2758         return 0;
2759 }
2760
2761 int pn533_finalize_setup(struct pn533 *dev)
2762 {
2763
2764         struct pn533_fw_version fw_ver;
2765         int rc;
2766
2767         memset(&fw_ver, 0, sizeof(fw_ver));
2768
2769         rc = pn533_get_firmware_version(dev, &fw_ver);
2770         if (rc) {
2771                 nfc_err(dev->dev, "Unable to get FW version\n");
2772                 return rc;
2773         }
2774
2775         nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
2776                 fw_ver.ic, fw_ver.ver, fw_ver.rev);
2777
2778         rc = pn533_setup(dev);
2779         if (rc)
2780                 return rc;
2781
2782         return 0;
2783 }
2784 EXPORT_SYMBOL_GPL(pn533_finalize_setup);
2785
2786 struct pn533 *pn53x_common_init(u32 device_type,
2787                                 enum pn533_protocol_type protocol_type,
2788                                 void *phy,
2789                                 struct pn533_phy_ops *phy_ops,
2790                                 struct pn533_frame_ops *fops,
2791                                 struct device *dev)
2792 {
2793         struct pn533 *priv;
2794         int rc = -ENOMEM;
2795
2796         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2797         if (!priv)
2798                 return ERR_PTR(-ENOMEM);
2799
2800         priv->phy = phy;
2801         priv->phy_ops = phy_ops;
2802         priv->dev = dev;
2803         if (fops != NULL)
2804                 priv->ops = fops;
2805         else
2806                 priv->ops = &pn533_std_frame_ops;
2807
2808         priv->protocol_type = protocol_type;
2809         priv->device_type = device_type;
2810
2811         mutex_init(&priv->cmd_lock);
2812
2813         INIT_WORK(&priv->cmd_work, pn533_wq_cmd);
2814         INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete);
2815         INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv);
2816         INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send);
2817         INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data);
2818         INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv);
2819         INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send);
2820         INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll);
2821         INIT_WORK(&priv->rf_work, pn533_wq_rf);
2822         priv->wq = alloc_ordered_workqueue("pn533", 0);
2823         if (priv->wq == NULL)
2824                 goto error;
2825
2826         timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0);
2827
2828         skb_queue_head_init(&priv->resp_q);
2829         skb_queue_head_init(&priv->fragment_skb);
2830
2831         INIT_LIST_HEAD(&priv->cmd_queue);
2832         return priv;
2833
2834 error:
2835         kfree(priv);
2836         return ERR_PTR(rc);
2837 }
2838 EXPORT_SYMBOL_GPL(pn53x_common_init);
2839
2840 void pn53x_common_clean(struct pn533 *priv)
2841 {
2842         struct pn533_cmd *cmd, *n;
2843
2844         flush_delayed_work(&priv->poll_work);
2845         destroy_workqueue(priv->wq);
2846
2847         skb_queue_purge(&priv->resp_q);
2848
2849         del_timer(&priv->listen_timer);
2850
2851         list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
2852                 list_del(&cmd->queue);
2853                 kfree(cmd);
2854         }
2855
2856         kfree(priv);
2857 }
2858 EXPORT_SYMBOL_GPL(pn53x_common_clean);
2859
2860 int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols,
2861                         struct device *parent)
2862 {
2863         priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2864                                            priv->ops->tx_header_len +
2865                                            PN533_CMD_DATAEXCH_HEAD_LEN,
2866                                            priv->ops->tx_tail_len);
2867         if (!priv->nfc_dev)
2868                 return -ENOMEM;
2869
2870         nfc_set_parent_dev(priv->nfc_dev, parent);
2871         nfc_set_drvdata(priv->nfc_dev, priv);
2872         return 0;
2873 }
2874 EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc);
2875
2876 int pn53x_register_nfc(struct pn533 *priv, u32 protocols,
2877                         struct device *parent)
2878 {
2879         int rc;
2880
2881         rc = pn532_i2c_nfc_alloc(priv, protocols, parent);
2882         if (rc)
2883                 return rc;
2884
2885         rc = nfc_register_device(priv->nfc_dev);
2886         if (rc)
2887                 nfc_free_device(priv->nfc_dev);
2888
2889         return rc;
2890 }
2891 EXPORT_SYMBOL_GPL(pn53x_register_nfc);
2892
2893 void pn53x_unregister_nfc(struct pn533 *priv)
2894 {
2895         nfc_unregister_device(priv->nfc_dev);
2896         nfc_free_device(priv->nfc_dev);
2897 }
2898 EXPORT_SYMBOL_GPL(pn53x_unregister_nfc);
2899
2900 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2901 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2902 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2903 MODULE_DESCRIPTION("PN533 driver ver " VERSION);
2904 MODULE_VERSION(VERSION);
2905 MODULE_LICENSE("GPL");