LXR linux/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 */
  28struct 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
  53struct pn533_config_max_retries {
  54        u8 mx_rty_atr;
  55        u8 mx_rty_psl;
  56        u8 mx_rty_passive_act;
  57} __packed;
  58
  59struct 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
  81union 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
  94struct 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
 103static 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
 163struct 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
 175struct 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
 188struct 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 */
 224static 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 */
 230static inline u8 pn533_std_checksum(u8 value)
 231{
 232        return ~value + 1;
 233}
 234
 235/* The rule: sum(data elements) + checksum = 0 */
 236static 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
 247static 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
 258static 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
 270static 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
 277static 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
 316bool 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}
 328EXPORT_SYMBOL_GPL(pn533_rx_frame_is_ack);
 329
 330static 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
 346static 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
 357bool 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}
 362EXPORT_SYMBOL_GPL(pn533_rx_frame_is_cmd_response);
 363
 364
 365static 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
 381static 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
 397static 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
 431done:
 432        kfree(cmd);
 433        dev->cmd = NULL;
 434        return rc;
 435}
 436
 437static 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
 480error:
 481        kfree(cmd);
 482unlock:
 483        mutex_unlock(&dev->cmd_lock);
 484        return rc;
 485}
 486
 487static 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        return __pn533_send_async(dev, cmd_code, req, complete_cb,
 493                                complete_cb_context);
 494}
 495
 496static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
 497                                struct sk_buff *req,
 498                                pn533_send_async_complete_t complete_cb,
 499                                void *complete_cb_context)
 500{
 501        return __pn533_send_async(dev, cmd_code, req, complete_cb,
 502                                complete_cb_context);
 503}
 504
 505/*
 506 * pn533_send_cmd_direct_async
 507 *
 508 * The function sends a priority cmd directly to the chip omitting the cmd
 509 * queue. It's intended to be used by chaining mechanism of received responses
 510 * where the host has to request every single chunk of data before scheduling
 511 * next cmd from the queue.
 512 */
 513static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
 514                                       struct sk_buff *req,
 515                                       pn533_send_async_complete_t complete_cb,
 516                                       void *complete_cb_context)
 517{
 518        struct pn533_cmd *cmd;
 519        int rc;
 520
 521        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 522        if (!cmd)
 523                return -ENOMEM;
 524
 525        cmd->code = cmd_code;
 526        cmd->req = req;
 527        cmd->complete_cb = complete_cb;
 528        cmd->complete_cb_context = complete_cb_context;
 529
 530        pn533_build_cmd_frame(dev, cmd_code, req);
 531
 532        dev->cmd = cmd;
 533        rc = dev->phy_ops->send_frame(dev, req);
 534        if (rc < 0) {
 535                dev->cmd = NULL;
 536                kfree(cmd);
 537        }
 538
 539        return rc;
 540}
 541
 542static void pn533_wq_cmd_complete(struct work_struct *work)
 543{
 544        struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
 545        int rc;
 546
 547        rc = pn533_send_async_complete(dev);
 548        if (rc != -EINPROGRESS)
 549                queue_work(dev->wq, &dev->cmd_work);
 550}
 551
 552static void pn533_wq_cmd(struct work_struct *work)
 553{
 554        struct pn533 *dev = container_of(work, struct pn533, cmd_work);
 555        struct pn533_cmd *cmd;
 556        int rc;
 557
 558        mutex_lock(&dev->cmd_lock);
 559
 560        if (list_empty(&dev->cmd_queue)) {
 561                dev->cmd_pending = 0;
 562                mutex_unlock(&dev->cmd_lock);
 563                return;
 564        }
 565
 566        cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
 567
 568        list_del(&cmd->queue);
 569
 570        mutex_unlock(&dev->cmd_lock);
 571
 572        dev->cmd = cmd;
 573        rc = dev->phy_ops->send_frame(dev, cmd->req);
 574        if (rc < 0) {
 575                dev->cmd = NULL;
 576                dev_kfree_skb(cmd->req);
 577                kfree(cmd);
 578                return;
 579        }
 580
 581}
 582
 583struct pn533_sync_cmd_response {
 584        struct sk_buff *resp;
 585        struct completion done;
 586};
 587
 588static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
 589                                    struct sk_buff *resp)
 590{
 591        struct pn533_sync_cmd_response *arg = _arg;
 592
 593        arg->resp = resp;
 594        complete(&arg->done);
 595
 596        return 0;
 597}
 598
 599/*  pn533_send_cmd_sync
 600 *
 601 *  Please note the req parameter is freed inside the function to
 602 *  limit a number of return value interpretations by the caller.
 603 *
 604 *  1. negative in case of error during TX path -> req should be freed
 605 *
 606 *  2. negative in case of error during RX path -> req should not be freed
 607 *     as it's been already freed at the beginning of RX path by
 608 *     async_complete_cb.
 609 *
 610 *  3. valid pointer in case of successful RX path
 611 *
 612 *  A caller has to check a return value with IS_ERR macro. If the test pass,
 613 *  the returned pointer is valid.
 614 *
 615 */
 616static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
 617                                               struct sk_buff *req)
 618{
 619        int rc;
 620        struct pn533_sync_cmd_response arg;
 621
 622        init_completion(&arg.done);
 623
 624        rc = pn533_send_cmd_async(dev, cmd_code, req,
 625                                  pn533_send_sync_complete, &arg);
 626        if (rc) {
 627                dev_kfree_skb(req);
 628                return ERR_PTR(rc);
 629        }
 630
 631        wait_for_completion(&arg.done);
 632
 633        return arg.resp;
 634}
 635
 636static struct sk_buff *pn533_alloc_skb(struct pn533 *dev, unsigned int size)
 637{
 638        struct sk_buff *skb;
 639
 640        skb = alloc_skb(dev->ops->tx_header_len +
 641                        size +
 642                        dev->ops->tx_tail_len, GFP_KERNEL);
 643
 644        if (skb)
 645                skb_reserve(skb, dev->ops->tx_header_len);
 646
 647        return skb;
 648}
 649
 650struct pn533_target_type_a {
 651        __be16 sens_res;
 652        u8 sel_res;
 653        u8 nfcid_len;
 654        u8 nfcid_data[];
 655} __packed;
 656
 657
 658#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
 659#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
 660#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
 661
 662#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
 663#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
 664
 665#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
 666#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
 667
 668#define PN533_TYPE_A_SEL_PROT_MIFARE 0
 669#define PN533_TYPE_A_SEL_PROT_ISO14443 1
 670#define PN533_TYPE_A_SEL_PROT_DEP 2
 671#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
 672
 673static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
 674                                                        int target_data_len)
 675{
 676        u8 ssd;
 677        u8 platconf;
 678
 679        if (target_data_len < sizeof(struct pn533_target_type_a))
 680                return false;
 681
 682        /*
 683         * The length check of nfcid[] and ats[] are not being performed because
 684         * the values are not being used
 685         */
 686
 687        /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
 688        ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
 689        platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
 690
 691        if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 692             platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
 693            (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 694             platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
 695                return false;
 696
 697        /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
 698        if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
 699                return false;
 700
 701        if (type_a->nfcid_len > NFC_NFCID1_MAXSIZE)
 702                return false;
 703
 704        return true;
 705}
 706
 707static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
 708                                                        int tgt_data_len)
 709{
 710        struct pn533_target_type_a *tgt_type_a;
 711
 712        tgt_type_a = (struct pn533_target_type_a *)tgt_data;
 713
 714        if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
 715                return -EPROTO;
 716
 717        switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
 718        case PN533_TYPE_A_SEL_PROT_MIFARE:
 719                nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
 720                break;
 721        case PN533_TYPE_A_SEL_PROT_ISO14443:
 722                nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
 723                break;
 724        case PN533_TYPE_A_SEL_PROT_DEP:
 725                nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
 726                break;
 727        case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
 728                nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
 729                                                        NFC_PROTO_NFC_DEP_MASK;
 730                break;
 731        }
 732
 733        nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
 734        nfc_tgt->sel_res = tgt_type_a->sel_res;
 735        nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
 736        memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
 737
 738        return 0;
 739}
 740
 741struct pn533_target_felica {
 742        u8 pol_res;
 743        u8 opcode;
 744        u8 nfcid2[NFC_NFCID2_MAXSIZE];
 745        u8 pad[8];
 746        /* optional */
 747        u8 syst_code[];
 748} __packed;
 749
 750#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
 751#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
 752
 753static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
 754                                                        int target_data_len)
 755{
 756        if (target_data_len < sizeof(struct pn533_target_felica))
 757                return false;
 758
 759        if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
 760                return false;
 761
 762        return true;
 763}
 764
 765static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
 766                                                        int tgt_data_len)
 767{
 768        struct pn533_target_felica *tgt_felica;
 769
 770        tgt_felica = (struct pn533_target_felica *)tgt_data;
 771
 772        if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
 773                return -EPROTO;
 774
 775        if ((tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1) &&
 776            (tgt_felica->nfcid2[1] == PN533_FELICA_SENSF_NFCID2_DEP_B2))
 777                nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
 778        else
 779                nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
 780
 781        memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
 782        nfc_tgt->sensf_res_len = 9;
 783
 784        memcpy(nfc_tgt->nfcid2, tgt_felica->nfcid2, NFC_NFCID2_MAXSIZE);
 785        nfc_tgt->nfcid2_len = NFC_NFCID2_MAXSIZE;
 786
 787        return 0;
 788}
 789
 790struct pn533_target_jewel {
 791        __be16 sens_res;
 792        u8 jewelid[4];
 793} __packed;
 794
 795static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
 796                                                        int target_data_len)
 797{
 798        u8 ssd;
 799        u8 platconf;
 800
 801        if (target_data_len < sizeof(struct pn533_target_jewel))
 802                return false;
 803
 804        /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
 805        ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
 806        platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
 807
 808        if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 809             platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
 810            (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
 811             platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
 812                return false;
 813
 814        return true;
 815}
 816
 817static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
 818                                                        int tgt_data_len)
 819{
 820        struct pn533_target_jewel *tgt_jewel;
 821
 822        tgt_jewel = (struct pn533_target_jewel *)tgt_data;
 823
 824        if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
 825                return -EPROTO;
 826
 827        nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
 828        nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
 829        nfc_tgt->nfcid1_len = 4;
 830        memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
 831
 832        return 0;
 833}
 834
 835struct pn533_type_b_prot_info {
 836        u8 bitrate;
 837        u8 fsci_type;
 838        u8 fwi_adc_fo;
 839} __packed;
 840
 841#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
 842#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
 843#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
 844
 845struct pn533_type_b_sens_res {
 846        u8 opcode;
 847        u8 nfcid[4];
 848        u8 appdata[4];
 849        struct pn533_type_b_prot_info prot_info;
 850} __packed;
 851
 852#define PN533_TYPE_B_OPC_SENSB_RES 0x50
 853
 854struct pn533_target_type_b {
 855        struct pn533_type_b_sens_res sensb_res;
 856        u8 attrib_res_len;
 857        u8 attrib_res[];
 858} __packed;
 859
 860static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
 861                                                        int target_data_len)
 862{
 863        if (target_data_len < sizeof(struct pn533_target_type_b))
 864                return false;
 865
 866        if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
 867                return false;
 868
 869        if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
 870                                                PN533_TYPE_B_PROT_TYPE_RFU_MASK)
 871                return false;
 872
 873        return true;
 874}
 875
 876static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
 877                                                        int tgt_data_len)
 878{
 879        struct pn533_target_type_b *tgt_type_b;
 880
 881        tgt_type_b = (struct pn533_target_type_b *)tgt_data;
 882
 883        if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
 884                return -EPROTO;
 885
 886        nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
 887
 888        return 0;
 889}
 890
 891static void pn533_poll_reset_mod_list(struct pn533 *dev);
 892static int pn533_target_found(struct pn533 *dev, u8 tg, u8 *tgdata,
 893                              int tgdata_len)
 894{
 895        struct nfc_target nfc_tgt;
 896        int rc;
 897
 898        dev_dbg(dev->dev, "%s: modulation=%d\n",
 899                __func__, dev->poll_mod_curr);
 900
 901        if (tg != 1)
 902                return -EPROTO;
 903
 904        memset(&nfc_tgt, 0, sizeof(struct nfc_target));
 905
 906        switch (dev->poll_mod_curr) {
 907        case PN533_POLL_MOD_106KBPS_A:
 908                rc = pn533_target_found_type_a(&nfc_tgt, tgdata, tgdata_len);
 909                break;
 910        case PN533_POLL_MOD_212KBPS_FELICA:
 911        case PN533_POLL_MOD_424KBPS_FELICA:
 912                rc = pn533_target_found_felica(&nfc_tgt, tgdata, tgdata_len);
 913                break;
 914        case PN533_POLL_MOD_106KBPS_JEWEL:
 915                rc = pn533_target_found_jewel(&nfc_tgt, tgdata, tgdata_len);
 916                break;
 917        case PN533_POLL_MOD_847KBPS_B:
 918                rc = pn533_target_found_type_b(&nfc_tgt, tgdata, tgdata_len);
 919                break;
 920        default:
 921                nfc_err(dev->dev,
 922                        "Unknown current poll modulation\n");
 923                return -EPROTO;
 924        }
 925
 926        if (rc)
 927                return rc;
 928
 929        if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
 930                dev_dbg(dev->dev,
 931                        "The Tg found doesn't have the desired protocol\n");
 932                return -EAGAIN;
 933        }
 934
 935        dev_dbg(dev->dev,
 936                "Target found - supported protocols: 0x%x\n",
 937                nfc_tgt.supported_protocols);
 938
 939        dev->tgt_available_prots = nfc_tgt.supported_protocols;
 940
 941        pn533_poll_reset_mod_list(dev);
 942        nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
 943
 944        return 0;
 945}
 946
 947static inline void pn533_poll_next_mod(struct pn533 *dev)
 948{
 949        dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
 950}
 951
 952static void pn533_poll_reset_mod_list(struct pn533 *dev)
 953{
 954        dev->poll_mod_count = 0;
 955}
 956
 957static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
 958{
 959        dev->poll_mod_active[dev->poll_mod_count] =
 960                (struct pn533_poll_modulations *)&poll_mod[mod_index];
 961        dev->poll_mod_count++;
 962}
 963
 964static void pn533_poll_create_mod_list(struct pn533 *dev,
 965                                       u32 im_protocols, u32 tm_protocols)
 966{
 967        pn533_poll_reset_mod_list(dev);
 968
 969        if ((im_protocols & NFC_PROTO_MIFARE_MASK) ||
 970            (im_protocols & NFC_PROTO_ISO14443_MASK) ||
 971            (im_protocols & NFC_PROTO_NFC_DEP_MASK))
 972                pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
 973
 974        if (im_protocols & NFC_PROTO_FELICA_MASK ||
 975            im_protocols & NFC_PROTO_NFC_DEP_MASK) {
 976                pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
 977                pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
 978        }
 979
 980        if (im_protocols & NFC_PROTO_JEWEL_MASK)
 981                pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
 982
 983        if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
 984                pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
 985
 986        if (tm_protocols)
 987                pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
 988}
 989
 990static int pn533_start_poll_complete(struct pn533 *dev, struct sk_buff *resp)
 991{
 992        u8 nbtg, tg, *tgdata;
 993        int rc, tgdata_len;
 994
 995        /* Toggle the DEP polling */
 996        if (dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK)
 997                dev->poll_dep = 1;
 998
 999        nbtg = resp->data[0];
1000        tg = resp->data[1];

1001        tgdata = &resp->data[2];
1002        tgdata_len = resp->len - 2;  /* nbtg + tg */
1003
1004        if (nbtg) {
1005                rc = pn533_target_found(dev, tg, tgdata, tgdata_len);
1006
1007                /* We must stop the poll after a valid target found */
1008                if (rc == 0)
1009                        return 0;
1010        }
1011
1012        return -EAGAIN;
1013}
1014
1015static struct sk_buff *pn533_alloc_poll_tg_frame(struct pn533 *dev)
1016{
1017        struct sk_buff *skb;
1018        u8 *felica, *nfcid3;
1019
1020        u8 *gbytes = dev->gb;
1021        size_t gbytes_len = dev->gb_len;
1022
1023        u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1024                                0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1025                                0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1026                                0xff, 0xff}; /* System code */
1027
1028        u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1029                               0x0, 0x0, 0x0,
1030                               0x40}; /* SEL_RES for DEP */
1031
1032        unsigned int skb_len = 36 + /*
1033                                     * mode (1), mifare (6),
1034                                     * felica (18), nfcid3 (10), gb_len (1)
1035                                     */
1036                               gbytes_len +
1037                               1;  /* len Tk*/
1038
1039        skb = pn533_alloc_skb(dev, skb_len);
1040        if (!skb)
1041                return NULL;
1042
1043        /* DEP support only */
1044        skb_put_u8(skb, PN533_INIT_TARGET_DEP);
1045
1046        /* MIFARE params */
1047        skb_put_data(skb, mifare_params, 6);
1048
1049        /* Felica params */
1050        felica = skb_put_data(skb, felica_params, 18);
1051        get_random_bytes(felica + 2, 6);
1052
1053        /* NFCID3 */
1054        nfcid3 = skb_put_zero(skb, 10);
1055        memcpy(nfcid3, felica, 8);
1056
1057        /* General bytes */
1058        skb_put_u8(skb, gbytes_len);
1059
1060        skb_put_data(skb, gbytes, gbytes_len);
1061
1062        /* Len Tk */
1063        skb_put_u8(skb, 0);
1064
1065        return skb;
1066}
1067
1068static void pn533_wq_tm_mi_recv(struct work_struct *work);
1069static struct sk_buff *pn533_build_response(struct pn533 *dev);
1070
1071static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1072                                      struct sk_buff *resp)
1073{
1074        struct sk_buff *skb;
1075        u8 status, ret, mi;
1076        int rc;
1077
1078        if (IS_ERR(resp)) {
1079                skb_queue_purge(&dev->resp_q);
1080                return PTR_ERR(resp);
1081        }
1082
1083        status = resp->data[0];
1084
1085        ret = status & PN533_CMD_RET_MASK;
1086        mi = status & PN533_CMD_MI_MASK;
1087
1088        skb_pull(resp, sizeof(status));
1089
1090        if (ret != PN533_CMD_RET_SUCCESS) {
1091                rc = -EIO;
1092                goto error;
1093        }
1094
1095        skb_queue_tail(&dev->resp_q, resp);
1096
1097        if (mi) {
1098                queue_work(dev->wq, &dev->mi_tm_rx_work);
1099                return -EINPROGRESS;
1100        }
1101
1102        skb = pn533_build_response(dev);
1103        if (!skb) {
1104                rc = -EIO;
1105                goto error;
1106        }
1107
1108        return nfc_tm_data_received(dev->nfc_dev, skb);
1109
1110error:
1111        nfc_tm_deactivated(dev->nfc_dev);
1112        dev->tgt_mode = 0;
1113        skb_queue_purge(&dev->resp_q);
1114        dev_kfree_skb(resp);
1115
1116        return rc;
1117}
1118
1119static void pn533_wq_tm_mi_recv(struct work_struct *work)
1120{
1121        struct pn533 *dev = container_of(work, struct pn533, mi_tm_rx_work);
1122        struct sk_buff *skb;
1123        int rc;
1124
1125        skb = pn533_alloc_skb(dev, 0);
1126        if (!skb)
1127                return;
1128
1129        rc = pn533_send_cmd_direct_async(dev,
1130                                        PN533_CMD_TG_GET_DATA,
1131                                        skb,
1132                                        pn533_tm_get_data_complete,
1133                                        NULL);
1134
1135        if (rc < 0)
1136                dev_kfree_skb(skb);
1137}
1138
1139static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
1140                                  struct sk_buff *resp);
1141static void pn533_wq_tm_mi_send(struct work_struct *work)
1142{
1143        struct pn533 *dev = container_of(work, struct pn533, mi_tm_tx_work);
1144        struct sk_buff *skb;
1145        int rc;
1146
1147        /* Grab the first skb in the queue */
1148        skb = skb_dequeue(&dev->fragment_skb);
1149        if (skb == NULL) {      /* No more data */
1150                /* Reset the queue for future use */
1151                skb_queue_head_init(&dev->fragment_skb);
1152                goto error;
1153        }
1154
1155        /* last entry - remove MI bit */
1156        if (skb_queue_len(&dev->fragment_skb) == 0) {
1157                rc = pn533_send_cmd_direct_async(dev, PN533_CMD_TG_SET_DATA,
1158                                        skb, pn533_tm_send_complete, NULL);
1159        } else
1160                rc = pn533_send_cmd_direct_async(dev,
1161                                        PN533_CMD_TG_SET_META_DATA,
1162                                        skb, pn533_tm_send_complete, NULL);
1163
1164        if (rc == 0) /* success */
1165                return;
1166
1167        dev_err(dev->dev,
1168                "Error %d when trying to perform set meta data_exchange", rc);
1169
1170        dev_kfree_skb(skb);
1171
1172error:
1173        dev->phy_ops->send_ack(dev, GFP_KERNEL);
1174        queue_work(dev->wq, &dev->cmd_work);
1175}
1176
1177static void pn533_wq_tg_get_data(struct work_struct *work)
1178{
1179        struct pn533 *dev = container_of(work, struct pn533, tg_work);
1180        struct sk_buff *skb;
1181        int rc;
1182
1183        skb = pn533_alloc_skb(dev, 0);
1184        if (!skb)
1185                return;
1186
1187        rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1188                                   pn533_tm_get_data_complete, NULL);
1189
1190        if (rc < 0)
1191                dev_kfree_skb(skb);
1192}
1193
1194#define ATR_REQ_GB_OFFSET 17
1195static int pn533_init_target_complete(struct pn533 *dev, struct sk_buff *resp)
1196{
1197        u8 mode, *cmd, comm_mode = NFC_COMM_PASSIVE, *gb;
1198        size_t gb_len;
1199        int rc;
1200
1201        if (resp->len < ATR_REQ_GB_OFFSET + 1)
1202                return -EINVAL;
1203
1204        mode = resp->data[0];
1205        cmd = &resp->data[1];
1206
1207        dev_dbg(dev->dev, "Target mode 0x%x len %d\n",
1208                mode, resp->len);
1209
1210        if ((mode & PN533_INIT_TARGET_RESP_FRAME_MASK) ==
1211            PN533_INIT_TARGET_RESP_ACTIVE)
1212                comm_mode = NFC_COMM_ACTIVE;
1213
1214        if ((mode & PN533_INIT_TARGET_RESP_DEP) == 0)  /* Only DEP supported */
1215                return -EOPNOTSUPP;
1216
1217        gb = cmd + ATR_REQ_GB_OFFSET;
1218        gb_len = resp->len - (ATR_REQ_GB_OFFSET + 1);
1219
1220        rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1221                              comm_mode, gb, gb_len);
1222        if (rc < 0) {
1223                nfc_err(dev->dev,
1224                        "Error when signaling target activation\n");
1225                return rc;
1226        }
1227
1228        dev->tgt_mode = 1;
1229        queue_work(dev->wq, &dev->tg_work);
1230
1231        return 0;
1232}
1233
1234static void pn533_listen_mode_timer(struct timer_list *t)
1235{
1236        struct pn533 *dev = from_timer(dev, t, listen_timer);
1237
1238        dev_dbg(dev->dev, "Listen mode timeout\n");
1239
1240        dev->cancel_listen = 1;
1241
1242        pn533_poll_next_mod(dev);
1243
1244        queue_delayed_work(dev->wq, &dev->poll_work,
1245                           msecs_to_jiffies(PN533_POLL_INTERVAL));
1246}
1247
1248static int pn533_rf_complete(struct pn533 *dev, void *arg,
1249                             struct sk_buff *resp)
1250{
1251        int rc = 0;
1252
1253        if (IS_ERR(resp)) {
1254                rc = PTR_ERR(resp);
1255
1256                nfc_err(dev->dev, "RF setting error %d\n", rc);
1257
1258                return rc;
1259        }
1260
1261        queue_delayed_work(dev->wq, &dev->poll_work,
1262                           msecs_to_jiffies(PN533_POLL_INTERVAL));
1263
1264        dev_kfree_skb(resp);
1265        return rc;
1266}
1267
1268static void pn533_wq_rf(struct work_struct *work)
1269{
1270        struct pn533 *dev = container_of(work, struct pn533, rf_work);
1271        struct sk_buff *skb;
1272        int rc;
1273
1274        skb = pn533_alloc_skb(dev, 2);
1275        if (!skb)
1276                return;
1277
1278        skb_put_u8(skb, PN533_CFGITEM_RF_FIELD);
1279        skb_put_u8(skb, PN533_CFGITEM_RF_FIELD_AUTO_RFCA);
1280
1281        rc = pn533_send_cmd_async(dev, PN533_CMD_RF_CONFIGURATION, skb,
1282                                  pn533_rf_complete, NULL);
1283        if (rc < 0) {
1284                dev_kfree_skb(skb);
1285                nfc_err(dev->dev, "RF setting error %d\n", rc);
1286        }
1287}
1288
1289static int pn533_poll_dep_complete(struct pn533 *dev, void *arg,
1290                                   struct sk_buff *resp)
1291{
1292        struct pn533_cmd_jump_dep_response *rsp;
1293        struct nfc_target nfc_target;
1294        u8 target_gt_len;
1295        int rc;
1296
1297        if (IS_ERR(resp))
1298                return PTR_ERR(resp);
1299
1300        rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1301
1302        rc = rsp->status & PN533_CMD_RET_MASK;
1303        if (rc != PN533_CMD_RET_SUCCESS) {
1304                /* Not target found, turn radio off */
1305                queue_work(dev->wq, &dev->rf_work);
1306
1307                dev_kfree_skb(resp);
1308                return 0;
1309        }
1310
1311        dev_dbg(dev->dev, "Creating new target");
1312
1313        nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1314        nfc_target.nfcid1_len = 10;
1315        memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1316        rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1317        if (rc)
1318                goto error;
1319
1320        dev->tgt_available_prots = 0;
1321        dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1322
1323        /* ATR_RES general bytes are located at offset 17 */
1324        target_gt_len = resp->len - 17;
1325        rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1326                                          rsp->gt, target_gt_len);
1327        if (!rc) {
1328                rc = nfc_dep_link_is_up(dev->nfc_dev,
1329                                        dev->nfc_dev->targets[0].idx,
1330                                        0, NFC_RF_INITIATOR);
1331
1332                if (!rc)
1333                        pn533_poll_reset_mod_list(dev);
1334        }
1335error:
1336        dev_kfree_skb(resp);
1337        return rc;
1338}
1339
1340#define PASSIVE_DATA_LEN 5
1341static int pn533_poll_dep(struct nfc_dev *nfc_dev)
1342{
1343        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1344        struct sk_buff *skb;
1345        int rc, skb_len;
1346        u8 *next, nfcid3[NFC_NFCID3_MAXSIZE];
1347        u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1348
1349        if (!dev->gb) {
1350                dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1351
1352                if (!dev->gb || !dev->gb_len) {
1353                        dev->poll_dep = 0;
1354                        queue_work(dev->wq, &dev->rf_work);
1355                }
1356        }
1357
1358        skb_len = 3 + dev->gb_len; /* ActPass + BR + Next */
1359        skb_len += PASSIVE_DATA_LEN;
1360
1361        /* NFCID3 */
1362        skb_len += NFC_NFCID3_MAXSIZE;
1363        nfcid3[0] = 0x1;
1364        nfcid3[1] = 0xfe;
1365        get_random_bytes(nfcid3 + 2, 6);
1366
1367        skb = pn533_alloc_skb(dev, skb_len);
1368        if (!skb)
1369                return -ENOMEM;
1370
1371        skb_put_u8(skb, 0x01);  /* Active */
1372        skb_put_u8(skb, 0x02);  /* 424 kbps */
1373
1374        next = skb_put(skb, 1);  /* Next */
1375        *next = 0;
1376
1377        /* Copy passive data */
1378        skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
1379        *next |= 1;
1380
1381        /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
1382        skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
1383        *next |= 2;
1384
1385        skb_put_data(skb, dev->gb, dev->gb_len);
1386        *next |= 4; /* We have some Gi */
1387
1388        rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
1389                                  pn533_poll_dep_complete, NULL);
1390
1391        if (rc < 0)
1392                dev_kfree_skb(skb);
1393
1394        return rc;
1395}
1396
1397static int pn533_autopoll_complete(struct pn533 *dev, void *arg,
1398                               struct sk_buff *resp)
1399{
1400        struct pn532_autopoll_resp *apr;
1401        struct nfc_target nfc_tgt;
1402        u8 nbtg;
1403        int rc;
1404
1405        if (IS_ERR(resp)) {
1406                rc = PTR_ERR(resp);
1407
1408                nfc_err(dev->dev, "%s  autopoll complete error %d\n",
1409                        __func__, rc);
1410
1411                if (rc == -ENOENT) {
1412                        if (dev->poll_mod_count != 0)
1413                                return rc;
1414                        goto stop_poll;
1415                } else if (rc < 0) {
1416                        nfc_err(dev->dev,
1417                                "Error %d when running autopoll\n", rc);
1418                        goto stop_poll;
1419                }
1420        }
1421
1422        nbtg = resp->data[0];
1423        if ((nbtg > 2) || (nbtg <= 0))
1424                return -EAGAIN;
1425
1426        apr = (struct pn532_autopoll_resp *)&resp->data[1];
1427        while (nbtg--) {
1428                memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1429                switch (apr->type) {
1430                case PN532_AUTOPOLL_TYPE_ISOA:
1431                        dev_dbg(dev->dev, "ISOA\n");
1432                        rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
1433                                                       apr->ln - 1);
1434                        break;
1435                case PN532_AUTOPOLL_TYPE_FELICA212:
1436                case PN532_AUTOPOLL_TYPE_FELICA424:
1437                        dev_dbg(dev->dev, "FELICA\n");
1438                        rc = pn533_target_found_felica(&nfc_tgt, apr->tgdata,
1439                                                       apr->ln - 1);
1440                        break;
1441                case PN532_AUTOPOLL_TYPE_JEWEL:
1442                        dev_dbg(dev->dev, "JEWEL\n");
1443                        rc = pn533_target_found_jewel(&nfc_tgt, apr->tgdata,
1444                                                      apr->ln - 1);
1445                        break;
1446                case PN532_AUTOPOLL_TYPE_ISOB:
1447                        dev_dbg(dev->dev, "ISOB\n");
1448                        rc = pn533_target_found_type_b(&nfc_tgt, apr->tgdata,
1449                                                       apr->ln - 1);
1450                        break;
1451                case PN532_AUTOPOLL_TYPE_MIFARE:
1452                        dev_dbg(dev->dev, "Mifare\n");
1453                        rc = pn533_target_found_type_a(&nfc_tgt, apr->tgdata,
1454                                                       apr->ln - 1);
1455                        break;
1456                default:
1457                        nfc_err(dev->dev,
1458                                    "Unknown current poll modulation\n");
1459                        rc = -EPROTO;
1460                }
1461
1462                if (rc)
1463                        goto done;
1464
1465                if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1466                        nfc_err(dev->dev,
1467                                    "The Tg found doesn't have the desired protocol\n");
1468                        rc = -EAGAIN;
1469                        goto done;
1470                }
1471
1472                dev->tgt_available_prots = nfc_tgt.supported_protocols;
1473                apr = (struct pn532_autopoll_resp *)
1474                        (apr->tgdata + (apr->ln - 1));
1475        }
1476
1477        pn533_poll_reset_mod_list(dev);
1478        nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1479
1480done:
1481        dev_kfree_skb(resp);
1482        return rc;
1483
1484stop_poll:
1485        nfc_err(dev->dev, "autopoll operation has been stopped\n");
1486
1487        pn533_poll_reset_mod_list(dev);
1488        dev->poll_protocols = 0;
1489        return rc;
1490}
1491
1492static int pn533_poll_complete(struct pn533 *dev, void *arg,
1493                               struct sk_buff *resp)
1494{
1495        struct pn533_poll_modulations *cur_mod;
1496        int rc;
1497
1498        if (IS_ERR(resp)) {
1499                rc = PTR_ERR(resp);
1500
1501                nfc_err(dev->dev, "%s  Poll complete error %d\n",
1502                        __func__, rc);
1503
1504                if (rc == -ENOENT) {
1505                        if (dev->poll_mod_count != 0)
1506                                return rc;
1507                        goto stop_poll;
1508                } else if (rc < 0) {
1509                        nfc_err(dev->dev,
1510                                "Error %d when running poll\n", rc);
1511                        goto stop_poll;
1512                }
1513        }
1514
1515        cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1516
1517        if (cur_mod->len == 0) { /* Target mode */
1518                del_timer(&dev->listen_timer);
1519                rc = pn533_init_target_complete(dev, resp);
1520                goto done;
1521        }
1522
1523        /* Initiator mode */
1524        rc = pn533_start_poll_complete(dev, resp);
1525        if (!rc)
1526                goto done;
1527
1528        if (!dev->poll_mod_count) {
1529                dev_dbg(dev->dev, "Polling has been stopped\n");
1530                goto done;
1531        }
1532
1533        pn533_poll_next_mod(dev);
1534        /* Not target found, turn radio off */
1535        queue_work(dev->wq, &dev->rf_work);
1536
1537done:
1538        dev_kfree_skb(resp);
1539        return rc;
1540
1541stop_poll:
1542        nfc_err(dev->dev, "Polling operation has been stopped\n");
1543
1544        pn533_poll_reset_mod_list(dev);
1545        dev->poll_protocols = 0;
1546        return rc;
1547}
1548
1549static struct sk_buff *pn533_alloc_poll_in_frame(struct pn533 *dev,
1550                                        struct pn533_poll_modulations *mod)
1551{
1552        struct sk_buff *skb;
1553
1554        skb = pn533_alloc_skb(dev, mod->len);
1555        if (!skb)
1556                return NULL;
1557
1558        skb_put_data(skb, &mod->data, mod->len);
1559
1560        return skb;
1561}
1562
1563static int pn533_send_poll_frame(struct pn533 *dev)
1564{
1565        struct pn533_poll_modulations *mod;
1566        struct sk_buff *skb;
1567        int rc;
1568        u8 cmd_code;
1569
1570        mod = dev->poll_mod_active[dev->poll_mod_curr];
1571
1572        dev_dbg(dev->dev, "%s mod len %d\n",
1573                __func__, mod->len);
1574
1575        if ((dev->poll_protocols & NFC_PROTO_NFC_DEP_MASK) && dev->poll_dep)  {
1576                dev->poll_dep = 0;
1577                return pn533_poll_dep(dev->nfc_dev);
1578        }
1579
1580        if (mod->len == 0) {  /* Listen mode */
1581                cmd_code = PN533_CMD_TG_INIT_AS_TARGET;
1582                skb = pn533_alloc_poll_tg_frame(dev);
1583        } else {  /* Polling mode */
1584                cmd_code =  PN533_CMD_IN_LIST_PASSIVE_TARGET;
1585                skb = pn533_alloc_poll_in_frame(dev, mod);
1586        }
1587
1588        if (!skb) {
1589                nfc_err(dev->dev, "Failed to allocate skb\n");
1590                return -ENOMEM;
1591        }
1592
1593        rc = pn533_send_cmd_async(dev, cmd_code, skb, pn533_poll_complete,
1594                                  NULL);
1595        if (rc < 0) {
1596                dev_kfree_skb(skb);
1597                nfc_err(dev->dev, "Polling loop error %d\n", rc);
1598        }
1599
1600        return rc;
1601}
1602
1603static void pn533_wq_poll(struct work_struct *work)
1604{
1605        struct pn533 *dev = container_of(work, struct pn533, poll_work.work);
1606        struct pn533_poll_modulations *cur_mod;
1607        int rc;
1608
1609        cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1610
1611        dev_dbg(dev->dev,
1612                "%s cancel_listen %d modulation len %d\n",
1613                __func__, dev->cancel_listen, cur_mod->len);
1614
1615        if (dev->cancel_listen == 1) {
1616                dev->cancel_listen = 0;
1617                dev->phy_ops->abort_cmd(dev, GFP_ATOMIC);
1618        }
1619
1620        rc = pn533_send_poll_frame(dev);
1621        if (rc)
1622                return;
1623
1624        if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1625                mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1626}
1627
1628static int pn533_start_poll(struct nfc_dev *nfc_dev,
1629                            u32 im_protocols, u32 tm_protocols)
1630{
1631        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1632        struct pn533_poll_modulations *cur_mod;
1633        struct sk_buff *skb;
1634        u8 rand_mod;
1635        int rc;
1636
1637        dev_dbg(dev->dev,
1638                "%s: im protocols 0x%x tm protocols 0x%x\n",
1639                __func__, im_protocols, tm_protocols);
1640
1641        if (dev->tgt_active_prot) {
1642                nfc_err(dev->dev,
1643                        "Cannot poll with a target already activated\n");
1644                return -EBUSY;
1645        }
1646
1647        if (dev->tgt_mode) {
1648                nfc_err(dev->dev,
1649                        "Cannot poll while already being activated\n");
1650                return -EBUSY;
1651        }
1652
1653        if (tm_protocols) {
1654                dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1655                if (dev->gb == NULL)
1656                        tm_protocols = 0;
1657        }
1658
1659        dev->poll_protocols = im_protocols;
1660        dev->listen_protocols = tm_protocols;
1661        if (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL) {
1662                skb = pn533_alloc_skb(dev, 4 + 6);
1663                if (!skb)
1664                        return -ENOMEM;
1665
1666                *((u8 *)skb_put(skb, sizeof(u8))) =
1667                        PN532_AUTOPOLL_POLLNR_INFINITE;
1668                *((u8 *)skb_put(skb, sizeof(u8))) = PN532_AUTOPOLL_PERIOD;
1669
1670                if ((im_protocols & NFC_PROTO_MIFARE_MASK) &&
1671                                (im_protocols & NFC_PROTO_ISO14443_MASK) &&
1672                                (im_protocols & NFC_PROTO_NFC_DEP_MASK))
1673                        *((u8 *)skb_put(skb, sizeof(u8))) =
1674                                PN532_AUTOPOLL_TYPE_GENERIC_106;
1675                else {
1676                        if (im_protocols & NFC_PROTO_MIFARE_MASK)
1677                                *((u8 *)skb_put(skb, sizeof(u8))) =
1678                                        PN532_AUTOPOLL_TYPE_MIFARE;
1679
1680                        if (im_protocols & NFC_PROTO_ISO14443_MASK)
1681                                *((u8 *)skb_put(skb, sizeof(u8))) =
1682                                        PN532_AUTOPOLL_TYPE_ISOA;
1683
1684                        if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1685                                *((u8 *)skb_put(skb, sizeof(u8))) =
1686                                        PN532_AUTOPOLL_TYPE_DEP_PASSIVE_106;
1687                                *((u8 *)skb_put(skb, sizeof(u8))) =
1688                                        PN532_AUTOPOLL_TYPE_DEP_PASSIVE_212;
1689                                *((u8 *)skb_put(skb, sizeof(u8))) =
1690                                        PN532_AUTOPOLL_TYPE_DEP_PASSIVE_424;
1691                        }
1692                }
1693
1694                if (im_protocols & NFC_PROTO_FELICA_MASK ||
1695                                im_protocols & NFC_PROTO_NFC_DEP_MASK) {
1696                        *((u8 *)skb_put(skb, sizeof(u8))) =
1697                                PN532_AUTOPOLL_TYPE_FELICA212;
1698                        *((u8 *)skb_put(skb, sizeof(u8))) =
1699                                PN532_AUTOPOLL_TYPE_FELICA424;
1700                }
1701
1702                if (im_protocols & NFC_PROTO_JEWEL_MASK)
1703                        *((u8 *)skb_put(skb, sizeof(u8))) =
1704                                PN532_AUTOPOLL_TYPE_JEWEL;
1705
1706                if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
1707                        *((u8 *)skb_put(skb, sizeof(u8))) =
1708                                PN532_AUTOPOLL_TYPE_ISOB;
1709
1710                if (tm_protocols)
1711                        *((u8 *)skb_put(skb, sizeof(u8))) =
1712                                PN532_AUTOPOLL_TYPE_DEP_ACTIVE_106;
1713
1714                rc = pn533_send_cmd_async(dev, PN533_CMD_IN_AUTOPOLL, skb,
1715                                pn533_autopoll_complete, NULL);
1716
1717                if (rc < 0)
1718                        dev_kfree_skb(skb);
1719                else
1720                        dev->poll_mod_count++;
1721
1722                return rc;
1723        }
1724
1725        pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1726
1727        /* Do not always start polling from the same modulation */
1728        get_random_bytes(&rand_mod, sizeof(rand_mod));
1729        rand_mod %= dev->poll_mod_count;
1730        dev->poll_mod_curr = rand_mod;
1731
1732        cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1733
1734        rc = pn533_send_poll_frame(dev);
1735
1736        /* Start listen timer */
1737        if (!rc && cur_mod->len == 0 && dev->poll_mod_count > 1)
1738                mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
1739
1740        return rc;
1741}
1742
1743static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1744{
1745        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1746
1747        del_timer(&dev->listen_timer);
1748
1749        if (!dev->poll_mod_count) {
1750                dev_dbg(dev->dev,
1751                        "Polling operation was not running\n");
1752                return;
1753        }
1754
1755        dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
1756        flush_delayed_work(&dev->poll_work);
1757        pn533_poll_reset_mod_list(dev);
1758}
1759
1760static int pn533_activate_target_nfcdep(struct pn533 *dev)
1761{
1762        struct pn533_cmd_activate_response *rsp;
1763        u16 gt_len;
1764        int rc;
1765        struct sk_buff *skb;
1766        struct sk_buff *resp;
1767
1768        skb = pn533_alloc_skb(dev, sizeof(u8) * 2); /*TG + Next*/
1769        if (!skb)
1770                return -ENOMEM;
1771
1772        skb_put_u8(skb, 1); /* TG */
1773        skb_put_u8(skb, 0); /* Next */
1774
1775        resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1776        if (IS_ERR(resp))
1777                return PTR_ERR(resp);
1778
1779        rsp = (struct pn533_cmd_activate_response *)resp->data;
1780        rc = rsp->status & PN533_CMD_RET_MASK;
1781        if (rc != PN533_CMD_RET_SUCCESS) {
1782                nfc_err(dev->dev,
1783                        "Target activation failed (error 0x%x)\n", rc);
1784                dev_kfree_skb(resp);
1785                return -EIO;
1786        }
1787
1788        /* ATR_RES general bytes are located at offset 16 */
1789        gt_len = resp->len - 16;
1790        rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
1791
1792        dev_kfree_skb(resp);
1793        return rc;
1794}
1795
1796static int pn533_activate_target(struct nfc_dev *nfc_dev,
1797                                 struct nfc_target *target, u32 protocol)
1798{
1799        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1800        int rc;
1801
1802        dev_dbg(dev->dev, "%s: protocol=%u\n", __func__, protocol);
1803
1804        if (dev->poll_mod_count) {
1805                nfc_err(dev->dev,
1806                        "Cannot activate while polling\n");
1807                return -EBUSY;
1808        }
1809
1810        if (dev->tgt_active_prot) {
1811                nfc_err(dev->dev,
1812                        "There is already an active target\n");
1813                return -EBUSY;
1814        }
1815
1816        if (!dev->tgt_available_prots) {
1817                nfc_err(dev->dev,
1818                        "There is no available target to activate\n");
1819                return -EINVAL;
1820        }
1821
1822        if (!(dev->tgt_available_prots & (1 << protocol))) {
1823                nfc_err(dev->dev,
1824                        "Target doesn't support requested proto %u\n",
1825                        protocol);
1826                return -EINVAL;
1827        }
1828
1829        if (protocol == NFC_PROTO_NFC_DEP) {
1830                rc = pn533_activate_target_nfcdep(dev);
1831                if (rc) {
1832                        nfc_err(dev->dev,
1833                                "Activating target with DEP failed %d\n", rc);
1834                        return rc;
1835                }
1836        }
1837
1838        dev->tgt_active_prot = protocol;
1839        dev->tgt_available_prots = 0;
1840
1841        return 0;
1842}
1843
1844static int pn533_deactivate_target_complete(struct pn533 *dev, void *arg,
1845                             struct sk_buff *resp)
1846{
1847        int rc = 0;
1848
1849        if (IS_ERR(resp)) {
1850                rc = PTR_ERR(resp);
1851
1852                nfc_err(dev->dev, "Target release error %d\n", rc);
1853
1854                return rc;
1855        }
1856
1857        rc = resp->data[0] & PN533_CMD_RET_MASK;
1858        if (rc != PN533_CMD_RET_SUCCESS)
1859                nfc_err(dev->dev,
1860                        "Error 0x%x when releasing the target\n", rc);
1861
1862        dev_kfree_skb(resp);
1863        return rc;
1864}
1865
1866static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1867                                    struct nfc_target *target, u8 mode)
1868{
1869        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1870        struct sk_buff *skb;
1871        int rc;
1872
1873        if (!dev->tgt_active_prot) {
1874                nfc_err(dev->dev, "There is no active target\n");
1875                return;
1876        }
1877
1878        dev->tgt_active_prot = 0;
1879        skb_queue_purge(&dev->resp_q);
1880
1881        skb = pn533_alloc_skb(dev, sizeof(u8));
1882        if (!skb)
1883                return;
1884
1885        skb_put_u8(skb, 1); /* TG*/
1886
1887        rc = pn533_send_cmd_async(dev, PN533_CMD_IN_RELEASE, skb,
1888                                  pn533_deactivate_target_complete, NULL);
1889        if (rc < 0) {
1890                dev_kfree_skb(skb);
1891                nfc_err(dev->dev, "Target release error %d\n", rc);
1892        }
1893}
1894
1895
1896static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1897                                         struct sk_buff *resp)
1898{
1899        struct pn533_cmd_jump_dep_response *rsp;
1900        u8 target_gt_len;
1901        int rc;
1902        u8 active = *(u8 *)arg;
1903
1904        kfree(arg);
1905
1906        if (IS_ERR(resp))
1907                return PTR_ERR(resp);
1908
1909        if (dev->tgt_available_prots &&
1910            !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1911                nfc_err(dev->dev,
1912                        "The target does not support DEP\n");
1913                rc =  -EINVAL;
1914                goto error;
1915        }
1916
1917        rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1918
1919        rc = rsp->status & PN533_CMD_RET_MASK;
1920        if (rc != PN533_CMD_RET_SUCCESS) {
1921                nfc_err(dev->dev,
1922                        "Bringing DEP link up failed (error 0x%x)\n", rc);
1923                goto error;
1924        }
1925
1926        if (!dev->tgt_available_prots) {
1927                struct nfc_target nfc_target;
1928
1929                dev_dbg(dev->dev, "Creating new target\n");
1930
1931                nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1932                nfc_target.nfcid1_len = 10;
1933                memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
1934                rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1935                if (rc)
1936                        goto error;
1937
1938                dev->tgt_available_prots = 0;
1939        }
1940
1941        dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1942
1943        /* ATR_RES general bytes are located at offset 17 */
1944        target_gt_len = resp->len - 17;
1945        rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1946                                          rsp->gt, target_gt_len);
1947        if (rc == 0)
1948                rc = nfc_dep_link_is_up(dev->nfc_dev,
1949                                        dev->nfc_dev->targets[0].idx,
1950                                        !active, NFC_RF_INITIATOR);
1951
1952error:
1953        dev_kfree_skb(resp);
1954        return rc;
1955}
1956
1957static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf);
1958static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
1959                             u8 comm_mode, u8 *gb, size_t gb_len)
1960{
1961        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1962        struct sk_buff *skb;
1963        int rc, skb_len;
1964        u8 *next, *arg, nfcid3[NFC_NFCID3_MAXSIZE];
1965        u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
1966
1967        if (dev->poll_mod_count) {
1968                nfc_err(dev->dev,
1969                        "Cannot bring the DEP link up while polling\n");
1970                return -EBUSY;
1971        }
1972
1973        if (dev->tgt_active_prot) {
1974                nfc_err(dev->dev,
1975                        "There is already an active target\n");
1976                return -EBUSY;
1977        }
1978
1979        skb_len = 3 + gb_len; /* ActPass + BR + Next */
1980        skb_len += PASSIVE_DATA_LEN;
1981
1982        /* NFCID3 */
1983        skb_len += NFC_NFCID3_MAXSIZE;
1984        if (target && !target->nfcid2_len) {
1985                nfcid3[0] = 0x1;
1986                nfcid3[1] = 0xfe;
1987                get_random_bytes(nfcid3 + 2, 6);
1988        }
1989
1990        skb = pn533_alloc_skb(dev, skb_len);
1991        if (!skb)
1992                return -ENOMEM;
1993
1994        skb_put_u8(skb, !comm_mode);  /* ActPass */
1995        skb_put_u8(skb, 0x02);  /* 424 kbps */
1996
1997        next = skb_put(skb, 1);  /* Next */
1998        *next = 0;
1999
2000        /* Copy passive data */

2001        skb_put_data(skb, passive_data, PASSIVE_DATA_LEN);
2002        *next |= 1;
2003
2004        /* Copy NFCID3 (which is NFCID2 from SENSF_RES) */
2005        if (target && target->nfcid2_len)
2006                memcpy(skb_put(skb, NFC_NFCID3_MAXSIZE), target->nfcid2,
2007                       target->nfcid2_len);
2008        else
2009                skb_put_data(skb, nfcid3, NFC_NFCID3_MAXSIZE);
2010        *next |= 2;
2011
2012        if (gb != NULL && gb_len > 0) {
2013                skb_put_data(skb, gb, gb_len);
2014                *next |= 4; /* We have some Gi */
2015        } else {
2016                *next = 0;
2017        }
2018
2019        arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2020        if (!arg) {
2021                dev_kfree_skb(skb);
2022                return -ENOMEM;
2023        }
2024
2025        *arg = !comm_mode;
2026
2027        pn533_rf_field(dev->nfc_dev, 0);
2028
2029        rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2030                                  pn533_in_dep_link_up_complete, arg);
2031
2032        if (rc < 0) {
2033                dev_kfree_skb(skb);
2034                kfree(arg);
2035        }
2036
2037        return rc;
2038}
2039
2040static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2041{
2042        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2043
2044        pn533_poll_reset_mod_list(dev);
2045
2046        if (dev->tgt_mode || dev->tgt_active_prot)
2047                dev->phy_ops->abort_cmd(dev, GFP_KERNEL);
2048
2049        dev->tgt_active_prot = 0;
2050        dev->tgt_mode = 0;
2051
2052        skb_queue_purge(&dev->resp_q);
2053
2054        return 0;
2055}
2056
2057struct pn533_data_exchange_arg {
2058        data_exchange_cb_t cb;
2059        void *cb_context;
2060};
2061
2062static struct sk_buff *pn533_build_response(struct pn533 *dev)
2063{
2064        struct sk_buff *skb, *tmp, *t;
2065        unsigned int skb_len = 0, tmp_len = 0;
2066
2067        if (skb_queue_empty(&dev->resp_q))
2068                return NULL;
2069
2070        if (skb_queue_len(&dev->resp_q) == 1) {
2071                skb = skb_dequeue(&dev->resp_q);
2072                goto out;
2073        }
2074
2075        skb_queue_walk_safe(&dev->resp_q, tmp, t)
2076                skb_len += tmp->len;
2077
2078        dev_dbg(dev->dev, "%s total length %d\n",
2079                __func__, skb_len);
2080
2081        skb = alloc_skb(skb_len, GFP_KERNEL);
2082        if (skb == NULL)
2083                goto out;
2084
2085        skb_put(skb, skb_len);
2086
2087        skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2088                memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2089                tmp_len += tmp->len;
2090        }
2091
2092out:
2093        skb_queue_purge(&dev->resp_q);
2094
2095        return skb;
2096}
2097
2098static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
2099                                        struct sk_buff *resp)
2100{
2101        struct pn533_data_exchange_arg *arg = _arg;
2102        struct sk_buff *skb;
2103        int rc = 0;
2104        u8 status, ret, mi;
2105
2106        if (IS_ERR(resp)) {
2107                rc = PTR_ERR(resp);
2108                goto _error;
2109        }
2110
2111        status = resp->data[0];
2112        ret = status & PN533_CMD_RET_MASK;
2113        mi = status & PN533_CMD_MI_MASK;
2114
2115        skb_pull(resp, sizeof(status));
2116
2117        if (ret != PN533_CMD_RET_SUCCESS) {
2118                nfc_err(dev->dev,
2119                        "Exchanging data failed (error 0x%x)\n", ret);
2120                rc = -EIO;
2121                goto error;
2122        }
2123
2124        skb_queue_tail(&dev->resp_q, resp);
2125
2126        if (mi) {
2127                dev->cmd_complete_mi_arg = arg;
2128                queue_work(dev->wq, &dev->mi_rx_work);
2129                return -EINPROGRESS;
2130        }
2131
2132        /* Prepare for the next round */
2133        if (skb_queue_len(&dev->fragment_skb) > 0) {
2134                dev->cmd_complete_dep_arg = arg;
2135                queue_work(dev->wq, &dev->mi_tx_work);
2136
2137                return -EINPROGRESS;
2138        }
2139
2140        skb = pn533_build_response(dev);
2141        if (!skb) {
2142                rc = -ENOMEM;
2143                goto error;
2144        }
2145
2146        arg->cb(arg->cb_context, skb, 0);
2147        kfree(arg);
2148        return 0;
2149
2150error:
2151        dev_kfree_skb(resp);
2152_error:
2153        skb_queue_purge(&dev->resp_q);
2154        arg->cb(arg->cb_context, NULL, rc);
2155        kfree(arg);
2156        return rc;
2157}
2158
2159/*
2160 * Receive an incoming pn533 frame. skb contains only header and payload.
2161 * If skb == NULL, it is a notification that the link below is dead.
2162 */
2163void pn533_recv_frame(struct pn533 *dev, struct sk_buff *skb, int status)
2164{
2165        if (!dev->cmd)
2166                goto sched_wq;
2167
2168        dev->cmd->status = status;
2169
2170        if (status != 0) {
2171                dev_dbg(dev->dev, "%s: Error received: %d\n", __func__, status);
2172                goto sched_wq;
2173        }
2174
2175        if (skb == NULL) {
2176                pr_err("NULL Frame -> link is dead\n");
2177                goto sched_wq;
2178        }
2179
2180        if (pn533_rx_frame_is_ack(skb->data)) {
2181                dev_dbg(dev->dev, "%s: Received ACK frame\n", __func__);
2182                dev_kfree_skb(skb);
2183                return;
2184        }
2185
2186        print_hex_dump_debug("PN533 RX: ", DUMP_PREFIX_NONE, 16, 1, skb->data,
2187                             dev->ops->rx_frame_size(skb->data), false);
2188
2189        if (!dev->ops->rx_is_frame_valid(skb->data, dev)) {
2190                nfc_err(dev->dev, "Received an invalid frame\n");
2191                dev->cmd->status = -EIO;
2192        } else if (!pn533_rx_frame_is_cmd_response(dev, skb->data)) {
2193                nfc_err(dev->dev, "It it not the response to the last command\n");
2194                dev->cmd->status = -EIO;
2195        }
2196
2197        dev->cmd->resp = skb;
2198
2199sched_wq:
2200        queue_work(dev->wq, &dev->cmd_complete_work);
2201}
2202EXPORT_SYMBOL(pn533_recv_frame);
2203
2204/* Split the Tx skb into small chunks */
2205static int pn533_fill_fragment_skbs(struct pn533 *dev, struct sk_buff *skb)
2206{
2207        struct sk_buff *frag;
2208        int  frag_size;
2209
2210        do {
2211                /* Remaining size */
2212                if (skb->len > PN533_CMD_DATAFRAME_MAXLEN)
2213                        frag_size = PN533_CMD_DATAFRAME_MAXLEN;
2214                else
2215                        frag_size = skb->len;
2216
2217                /* Allocate and reserve */
2218                frag = pn533_alloc_skb(dev, frag_size);
2219                if (!frag) {
2220                        skb_queue_purge(&dev->fragment_skb);
2221                        break;
2222                }
2223
2224                if (!dev->tgt_mode) {
2225                        /* Reserve the TG/MI byte */
2226                        skb_reserve(frag, 1);
2227
2228                        /* MI + TG */
2229                        if (frag_size  == PN533_CMD_DATAFRAME_MAXLEN)
2230                                *(u8 *)skb_push(frag, sizeof(u8)) =
2231                                                (PN533_CMD_MI_MASK | 1);
2232                        else
2233                                *(u8 *)skb_push(frag, sizeof(u8)) =  1; /* TG */
2234                }
2235
2236                skb_put_data(frag, skb->data, frag_size);
2237
2238                /* Reduce the size of incoming buffer */
2239                skb_pull(skb, frag_size);
2240
2241                /* Add this to skb_queue */
2242                skb_queue_tail(&dev->fragment_skb, frag);
2243
2244        } while (skb->len > 0);
2245
2246        dev_kfree_skb(skb);
2247
2248        return skb_queue_len(&dev->fragment_skb);
2249}
2250
2251static int pn533_transceive(struct nfc_dev *nfc_dev,
2252                            struct nfc_target *target, struct sk_buff *skb,
2253                            data_exchange_cb_t cb, void *cb_context)
2254{
2255        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2256        struct pn533_data_exchange_arg *arg = NULL;
2257        int rc;
2258
2259        if (!dev->tgt_active_prot) {
2260                nfc_err(dev->dev,
2261                        "Can't exchange data if there is no active target\n");
2262                rc = -EINVAL;
2263                goto error;
2264        }
2265
2266        arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2267        if (!arg) {
2268                rc = -ENOMEM;
2269                goto error;
2270        }
2271
2272        arg->cb = cb;
2273        arg->cb_context = cb_context;
2274
2275        switch (dev->device_type) {
2276        case PN533_DEVICE_PASORI:
2277                if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2278                        rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2279                                                   skb,
2280                                                   pn533_data_exchange_complete,
2281                                                   arg);
2282
2283                        break;
2284                }
2285                fallthrough;
2286        default:
2287                /* jumbo frame ? */
2288                if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2289                        rc = pn533_fill_fragment_skbs(dev, skb);
2290                        if (rc <= 0)
2291                                goto error;
2292
2293                        skb = skb_dequeue(&dev->fragment_skb);
2294                        if (!skb) {
2295                                rc = -EIO;
2296                                goto error;
2297                        }
2298                } else {
2299                        *(u8 *)skb_push(skb, sizeof(u8)) =  1; /* TG */
2300                }
2301
2302                rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2303                                           skb, pn533_data_exchange_complete,
2304                                           arg);
2305
2306                break;
2307        }
2308
2309        if (rc < 0) /* rc from send_async */
2310                goto error;
2311
2312        return 0;
2313
2314error:
2315        kfree(arg);
2316        dev_kfree_skb(skb);
2317        return rc;
2318}
2319
2320static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
2321                                  struct sk_buff *resp)
2322{
2323        u8 status;
2324
2325        if (IS_ERR(resp))
2326                return PTR_ERR(resp);
2327
2328        status = resp->data[0];
2329
2330        /* Prepare for the next round */
2331        if (skb_queue_len(&dev->fragment_skb) > 0) {
2332                queue_work(dev->wq, &dev->mi_tm_tx_work);
2333                return -EINPROGRESS;
2334        }
2335        dev_kfree_skb(resp);
2336
2337        if (status != 0) {
2338                nfc_tm_deactivated(dev->nfc_dev);
2339
2340                dev->tgt_mode = 0;
2341
2342                return 0;
2343        }
2344
2345        queue_work(dev->wq, &dev->tg_work);
2346
2347        return 0;
2348}
2349
2350static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2351{
2352        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2353        int rc;
2354
2355        /* let's split in multiple chunks if size's too big */
2356        if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2357                rc = pn533_fill_fragment_skbs(dev, skb);
2358                if (rc <= 0)
2359                        goto error;
2360
2361                /* get the first skb */
2362                skb = skb_dequeue(&dev->fragment_skb);
2363                if (!skb) {
2364                        rc = -EIO;
2365                        goto error;
2366                }
2367
2368                rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_META_DATA, skb,
2369                                                pn533_tm_send_complete, NULL);
2370        } else {
2371                /* Send th skb */
2372                rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2373                                                pn533_tm_send_complete, NULL);
2374        }
2375
2376error:
2377        if (rc < 0) {
2378                dev_kfree_skb(skb);
2379                skb_queue_purge(&dev->fragment_skb);
2380        }
2381
2382        return rc;
2383}
2384
2385static void pn533_wq_mi_recv(struct work_struct *work)
2386{
2387        struct pn533 *dev = container_of(work, struct pn533, mi_rx_work);
2388        struct sk_buff *skb;
2389        int rc;
2390
2391        skb = pn533_alloc_skb(dev, PN533_CMD_DATAEXCH_HEAD_LEN);
2392        if (!skb)
2393                goto error;
2394
2395        switch (dev->device_type) {
2396        case PN533_DEVICE_PASORI:
2397                if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2398                        rc = pn533_send_cmd_direct_async(dev,
2399                                                PN533_CMD_IN_COMM_THRU,
2400                                                skb,
2401                                                pn533_data_exchange_complete,
2402                                                 dev->cmd_complete_mi_arg);
2403
2404                        break;
2405                }
2406                fallthrough;
2407        default:
2408                skb_put_u8(skb, 1); /*TG*/
2409
2410                rc = pn533_send_cmd_direct_async(dev,
2411                                                 PN533_CMD_IN_DATA_EXCHANGE,
2412                                                 skb,
2413                                                 pn533_data_exchange_complete,
2414                                                 dev->cmd_complete_mi_arg);
2415
2416                break;
2417        }
2418
2419        if (rc == 0) /* success */
2420                return;
2421
2422        nfc_err(dev->dev,
2423                "Error %d when trying to perform data_exchange\n", rc);
2424
2425        dev_kfree_skb(skb);
2426        kfree(dev->cmd_complete_mi_arg);
2427
2428error:
2429        dev->phy_ops->send_ack(dev, GFP_KERNEL);
2430        queue_work(dev->wq, &dev->cmd_work);
2431}
2432
2433static void pn533_wq_mi_send(struct work_struct *work)
2434{
2435        struct pn533 *dev = container_of(work, struct pn533, mi_tx_work);
2436        struct sk_buff *skb;
2437        int rc;
2438
2439        /* Grab the first skb in the queue */
2440        skb = skb_dequeue(&dev->fragment_skb);
2441
2442        if (skb == NULL) {      /* No more data */
2443                /* Reset the queue for future use */
2444                skb_queue_head_init(&dev->fragment_skb);
2445                goto error;
2446        }
2447
2448        switch (dev->device_type) {
2449        case PN533_DEVICE_PASORI:
2450                if (dev->tgt_active_prot != NFC_PROTO_FELICA) {
2451                        rc = -EIO;
2452                        break;
2453                }
2454
2455                rc = pn533_send_cmd_direct_async(dev, PN533_CMD_IN_COMM_THRU,
2456                                                 skb,
2457                                                 pn533_data_exchange_complete,
2458                                                 dev->cmd_complete_dep_arg);
2459
2460                break;
2461
2462        default:
2463                /* Still some fragments? */
2464                rc = pn533_send_cmd_direct_async(dev,
2465                                                 PN533_CMD_IN_DATA_EXCHANGE,
2466                                                 skb,
2467                                                 pn533_data_exchange_complete,
2468                                                 dev->cmd_complete_dep_arg);
2469
2470                break;
2471        }
2472
2473        if (rc == 0) /* success */
2474                return;
2475
2476        nfc_err(dev->dev,
2477                "Error %d when trying to perform data_exchange\n", rc);
2478
2479        dev_kfree_skb(skb);
2480        kfree(dev->cmd_complete_dep_arg);
2481
2482error:
2483        dev->phy_ops->send_ack(dev, GFP_KERNEL);
2484        queue_work(dev->wq, &dev->cmd_work);
2485}
2486
2487static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2488                                                                u8 cfgdata_len)
2489{
2490        struct sk_buff *skb;
2491        struct sk_buff *resp;
2492        int skb_len;
2493
2494        skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
2495
2496        skb = pn533_alloc_skb(dev, skb_len);
2497        if (!skb)
2498                return -ENOMEM;
2499
2500        skb_put_u8(skb, cfgitem);
2501        skb_put_data(skb, cfgdata, cfgdata_len);
2502
2503        resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2504        if (IS_ERR(resp))
2505                return PTR_ERR(resp);
2506
2507        dev_kfree_skb(resp);
2508        return 0;
2509}
2510
2511static int pn533_get_firmware_version(struct pn533 *dev,
2512                                      struct pn533_fw_version *fv)
2513{
2514        struct sk_buff *skb;
2515        struct sk_buff *resp;
2516
2517        skb = pn533_alloc_skb(dev, 0);
2518        if (!skb)
2519                return -ENOMEM;
2520
2521        resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2522        if (IS_ERR(resp))
2523                return PTR_ERR(resp);
2524
2525        fv->ic = resp->data[0];
2526        fv->ver = resp->data[1];
2527        fv->rev = resp->data[2];
2528        fv->support = resp->data[3];
2529
2530        dev_kfree_skb(resp);
2531        return 0;
2532}
2533
2534static int pn533_pasori_fw_reset(struct pn533 *dev)
2535{
2536        struct sk_buff *skb;
2537        struct sk_buff *resp;
2538
2539        skb = pn533_alloc_skb(dev, sizeof(u8));
2540        if (!skb)
2541                return -ENOMEM;
2542
2543        skb_put_u8(skb, 0x1);
2544
2545        resp = pn533_send_cmd_sync(dev, 0x18, skb);
2546        if (IS_ERR(resp))
2547                return PTR_ERR(resp);
2548
2549        dev_kfree_skb(resp);
2550
2551        return 0;
2552}
2553
2554static int pn533_rf_field(struct nfc_dev *nfc_dev, u8 rf)
2555{
2556        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2557        u8 rf_field = !!rf;
2558        int rc;
2559
2560        rf_field |= PN533_CFGITEM_RF_FIELD_AUTO_RFCA;
2561
2562        rc = pn533_set_configuration(dev, PN533_CFGITEM_RF_FIELD,
2563                                     (u8 *)&rf_field, 1);
2564        if (rc) {
2565                nfc_err(dev->dev, "Error on setting RF field\n");
2566                return rc;
2567        }
2568
2569        return 0;
2570}
2571
2572static int pn532_sam_configuration(struct nfc_dev *nfc_dev)
2573{
2574        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2575        struct sk_buff *skb;
2576        struct sk_buff *resp;
2577
2578        skb = pn533_alloc_skb(dev, 1);
2579        if (!skb)
2580                return -ENOMEM;
2581
2582        skb_put_u8(skb, 0x01);
2583
2584        resp = pn533_send_cmd_sync(dev, PN533_CMD_SAM_CONFIGURATION, skb);
2585        if (IS_ERR(resp))
2586                return PTR_ERR(resp);
2587
2588        dev_kfree_skb(resp);
2589        return 0;
2590}
2591
2592static int pn533_dev_up(struct nfc_dev *nfc_dev)
2593{
2594        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2595        int rc;
2596
2597        if (dev->phy_ops->dev_up) {
2598                rc = dev->phy_ops->dev_up(dev);
2599                if (rc)
2600                        return rc;
2601        }
2602
2603        if ((dev->device_type == PN533_DEVICE_PN532) ||
2604                (dev->device_type == PN533_DEVICE_PN532_AUTOPOLL)) {
2605                rc = pn532_sam_configuration(nfc_dev);
2606
2607                if (rc)
2608                        return rc;
2609        }
2610
2611        return pn533_rf_field(nfc_dev, 1);
2612}
2613
2614static int pn533_dev_down(struct nfc_dev *nfc_dev)
2615{
2616        struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2617        int ret;
2618
2619        ret = pn533_rf_field(nfc_dev, 0);
2620        if (dev->phy_ops->dev_down && !ret)
2621                ret = dev->phy_ops->dev_down(dev);
2622
2623        return ret;
2624}
2625
2626static const struct nfc_ops pn533_nfc_ops = {
2627        .dev_up = pn533_dev_up,
2628        .dev_down = pn533_dev_down,
2629        .dep_link_up = pn533_dep_link_up,
2630        .dep_link_down = pn533_dep_link_down,
2631        .start_poll = pn533_start_poll,
2632        .stop_poll = pn533_stop_poll,
2633        .activate_target = pn533_activate_target,
2634        .deactivate_target = pn533_deactivate_target,
2635        .im_transceive = pn533_transceive,
2636        .tm_send = pn533_tm_send,
2637};
2638
2639static int pn533_setup(struct pn533 *dev)
2640{
2641        struct pn533_config_max_retries max_retries;
2642        struct pn533_config_timing timing;
2643        u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2644        int rc;
2645
2646        switch (dev->device_type) {
2647        case PN533_DEVICE_STD:
2648        case PN533_DEVICE_PASORI:
2649        case PN533_DEVICE_ACR122U:
2650        case PN533_DEVICE_PN532:
2651        case PN533_DEVICE_PN532_AUTOPOLL:
2652                max_retries.mx_rty_atr = 0x2;
2653                max_retries.mx_rty_psl = 0x1;
2654                max_retries.mx_rty_passive_act =
2655                        PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2656
2657                timing.rfu = PN533_CONFIG_TIMING_102;
2658                timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2659                timing.dep_timeout = PN533_CONFIG_TIMING_204;
2660
2661                break;
2662
2663        default:
2664                nfc_err(dev->dev, "Unknown device type %d\n",
2665                        dev->device_type);
2666                return -EINVAL;
2667        }
2668
2669        rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2670                                     (u8 *)&max_retries, sizeof(max_retries));
2671        if (rc) {
2672                nfc_err(dev->dev,
2673                        "Error on setting MAX_RETRIES config\n");
2674                return rc;
2675        }
2676
2677
2678        rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2679                                     (u8 *)&timing, sizeof(timing));
2680        if (rc) {
2681                nfc_err(dev->dev, "Error on setting RF timings\n");
2682                return rc;
2683        }
2684
2685        switch (dev->device_type) {
2686        case PN533_DEVICE_STD:
2687        case PN533_DEVICE_PN532:
2688        case PN533_DEVICE_PN532_AUTOPOLL:
2689                break;
2690
2691        case PN533_DEVICE_PASORI:
2692                pn533_pasori_fw_reset(dev);
2693
2694                rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2695                                             pasori_cfg, 3);
2696                if (rc) {
2697                        nfc_err(dev->dev,
2698                                "Error while settings PASORI config\n");
2699                        return rc;
2700                }
2701
2702                pn533_pasori_fw_reset(dev);
2703
2704                break;
2705        }
2706
2707        return 0;
2708}
2709
2710int pn533_finalize_setup(struct pn533 *dev)
2711{
2712
2713        struct pn533_fw_version fw_ver;
2714        int rc;
2715
2716        memset(&fw_ver, 0, sizeof(fw_ver));
2717
2718        rc = pn533_get_firmware_version(dev, &fw_ver);
2719        if (rc) {
2720                nfc_err(dev->dev, "Unable to get FW version\n");
2721                return rc;
2722        }
2723
2724        nfc_info(dev->dev, "NXP PN5%02X firmware ver %d.%d now attached\n",
2725                fw_ver.ic, fw_ver.ver, fw_ver.rev);
2726
2727        rc = pn533_setup(dev);
2728        if (rc)
2729                return rc;
2730
2731        return 0;
2732}
2733EXPORT_SYMBOL_GPL(pn533_finalize_setup);
2734
2735struct pn533 *pn53x_common_init(u32 device_type,
2736                                enum pn533_protocol_type protocol_type,
2737                                void *phy,
2738                                struct pn533_phy_ops *phy_ops,
2739                                struct pn533_frame_ops *fops,
2740                                struct device *dev)
2741{
2742        struct pn533 *priv;
2743
2744        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2745        if (!priv)
2746                return ERR_PTR(-ENOMEM);
2747
2748        priv->phy = phy;
2749        priv->phy_ops = phy_ops;
2750        priv->dev = dev;
2751        if (fops != NULL)
2752                priv->ops = fops;
2753        else
2754                priv->ops = &pn533_std_frame_ops;
2755
2756        priv->protocol_type = protocol_type;
2757        priv->device_type = device_type;
2758
2759        mutex_init(&priv->cmd_lock);
2760
2761        INIT_WORK(&priv->cmd_work, pn533_wq_cmd);
2762        INIT_WORK(&priv->cmd_complete_work, pn533_wq_cmd_complete);
2763        INIT_WORK(&priv->mi_rx_work, pn533_wq_mi_recv);
2764        INIT_WORK(&priv->mi_tx_work, pn533_wq_mi_send);
2765        INIT_WORK(&priv->tg_work, pn533_wq_tg_get_data);
2766        INIT_WORK(&priv->mi_tm_rx_work, pn533_wq_tm_mi_recv);
2767        INIT_WORK(&priv->mi_tm_tx_work, pn533_wq_tm_mi_send);
2768        INIT_DELAYED_WORK(&priv->poll_work, pn533_wq_poll);
2769        INIT_WORK(&priv->rf_work, pn533_wq_rf);
2770        priv->wq = alloc_ordered_workqueue("pn533", 0);
2771        if (priv->wq == NULL)
2772                goto error;
2773
2774        timer_setup(&priv->listen_timer, pn533_listen_mode_timer, 0);
2775
2776        skb_queue_head_init(&priv->resp_q);
2777        skb_queue_head_init(&priv->fragment_skb);
2778
2779        INIT_LIST_HEAD(&priv->cmd_queue);
2780        return priv;
2781
2782error:
2783        kfree(priv);
2784        return ERR_PTR(-ENOMEM);
2785}
2786EXPORT_SYMBOL_GPL(pn53x_common_init);
2787
2788void pn53x_common_clean(struct pn533 *priv)
2789{
2790        struct pn533_cmd *cmd, *n;
2791
2792        flush_delayed_work(&priv->poll_work);
2793        destroy_workqueue(priv->wq);
2794
2795        skb_queue_purge(&priv->resp_q);
2796
2797        del_timer(&priv->listen_timer);
2798
2799        list_for_each_entry_safe(cmd, n, &priv->cmd_queue, queue) {
2800                list_del(&cmd->queue);
2801                kfree(cmd);
2802        }
2803
2804        kfree(priv);
2805}
2806EXPORT_SYMBOL_GPL(pn53x_common_clean);
2807
2808int pn532_i2c_nfc_alloc(struct pn533 *priv, u32 protocols,
2809                        struct device *parent)
2810{
2811        priv->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2812                                           priv->ops->tx_header_len +
2813                                           PN533_CMD_DATAEXCH_HEAD_LEN,
2814                                           priv->ops->tx_tail_len);
2815        if (!priv->nfc_dev)
2816                return -ENOMEM;
2817
2818        nfc_set_parent_dev(priv->nfc_dev, parent);
2819        nfc_set_drvdata(priv->nfc_dev, priv);
2820        return 0;
2821}
2822EXPORT_SYMBOL_GPL(pn532_i2c_nfc_alloc);
2823
2824int pn53x_register_nfc(struct pn533 *priv, u32 protocols,
2825                        struct device *parent)
2826{
2827        int rc;
2828
2829        rc = pn532_i2c_nfc_alloc(priv, protocols, parent);
2830        if (rc)
2831                return rc;
2832
2833        rc = nfc_register_device(priv->nfc_dev);
2834        if (rc)
2835                nfc_free_device(priv->nfc_dev);
2836
2837        return rc;
2838}
2839EXPORT_SYMBOL_GPL(pn53x_register_nfc);
2840
2841void pn53x_unregister_nfc(struct pn533 *priv)
2842{
2843        nfc_unregister_device(priv->nfc_dev);
2844        nfc_free_device(priv->nfc_dev);
2845}
2846EXPORT_SYMBOL_GPL(pn53x_unregister_nfc);
2847
2848MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
2849MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2850MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
2851MODULE_DESCRIPTION("PN533 driver ver " VERSION);
2852MODULE_VERSION(VERSION);
2853MODULE_LICENSE("GPL");
2854