linux/drivers/nfc/port100.c
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   1/*
   2 * Sony NFC Port-100 Series driver
   3 * Copyright (c) 2013, Intel Corporation.
   4 *
   5 * Partly based/Inspired by Stephen Tiedemann's nfcpy
   6 *
   7 * This program is free software; you can redistribute it and/or modify it
   8 * under the terms and conditions of the GNU General Public License,
   9 * version 2, as published by the Free Software Foundation.
  10 *
  11 * This program is distributed in the hope it will be useful, but WITHOUT
  12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14 * more details.
  15 *
  16 */
  17
  18#include <linux/module.h>
  19#include <linux/usb.h>
  20#include <net/nfc/digital.h>
  21
  22#define VERSION "0.1"
  23
  24#define SONY_VENDOR_ID    0x054c
  25#define RCS380_PRODUCT_ID 0x06c1
  26
  27#define PORT100_PROTOCOLS (NFC_PROTO_JEWEL_MASK    | \
  28                           NFC_PROTO_MIFARE_MASK   | \
  29                           NFC_PROTO_FELICA_MASK   | \
  30                           NFC_PROTO_NFC_DEP_MASK  | \
  31                           NFC_PROTO_ISO14443_MASK | \
  32                           NFC_PROTO_ISO14443_B_MASK)
  33
  34#define PORT100_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \
  35                              NFC_DIGITAL_DRV_CAPS_TG_CRC)
  36
  37/* Standard port100 frame definitions */
  38#define PORT100_FRAME_HEADER_LEN (sizeof(struct port100_frame) \
  39                                  + 2) /* data[0] CC, data[1] SCC */
  40#define PORT100_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
  41
  42#define PORT100_COMM_RF_HEAD_MAX_LEN (sizeof(struct port100_tg_comm_rf_cmd))
  43
  44/*
  45 * Max extended frame payload len, excluding CC and SCC
  46 * which are already in PORT100_FRAME_HEADER_LEN.
  47 */
  48#define PORT100_FRAME_MAX_PAYLOAD_LEN 1001
  49
  50#define PORT100_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
  51                                    Postamble (1) */
  52static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
  53        0x00, 0x00, 0xff, 0x00, 0xff, 0x00
  54};
  55
  56#define PORT100_FRAME_CHECKSUM(f) (f->data[le16_to_cpu(f->datalen)])
  57#define PORT100_FRAME_POSTAMBLE(f) (f->data[le16_to_cpu(f->datalen) + 1])
  58
  59/* start of frame */
  60#define PORT100_FRAME_SOF       0x00FF
  61#define PORT100_FRAME_EXT       0xFFFF
  62#define PORT100_FRAME_ACK       0x00FF
  63
  64/* Port-100 command: in or out */
  65#define PORT100_FRAME_DIRECTION(f) (f->data[0]) /* CC */
  66#define PORT100_FRAME_DIR_OUT 0xD6
  67#define PORT100_FRAME_DIR_IN  0xD7
  68
  69/* Port-100 sub-command */
  70#define PORT100_FRAME_CMD(f) (f->data[1]) /* SCC */
  71
  72#define PORT100_CMD_GET_FIRMWARE_VERSION 0x20
  73#define PORT100_CMD_GET_COMMAND_TYPE     0x28
  74#define PORT100_CMD_SET_COMMAND_TYPE     0x2A
  75
  76#define PORT100_CMD_IN_SET_RF       0x00
  77#define PORT100_CMD_IN_SET_PROTOCOL 0x02
  78#define PORT100_CMD_IN_COMM_RF      0x04
  79
  80#define PORT100_CMD_TG_SET_RF       0x40
  81#define PORT100_CMD_TG_SET_PROTOCOL 0x42
  82#define PORT100_CMD_TG_SET_RF_OFF   0x46
  83#define PORT100_CMD_TG_COMM_RF      0x48
  84
  85#define PORT100_CMD_SWITCH_RF       0x06
  86
  87#define PORT100_CMD_RESPONSE(cmd) (cmd + 1)
  88
  89#define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \
  90        ((mask) & (0x01 << (cmd_type)))
  91#define PORT100_CMD_TYPE_0      0
  92#define PORT100_CMD_TYPE_1      1
  93
  94#define PORT100_CMD_STATUS_OK      0x00
  95#define PORT100_CMD_STATUS_TIMEOUT 0x80
  96
  97#define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01
  98#define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK      0x02
  99
 100struct port100;
 101
 102typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg,
 103                                              struct sk_buff *resp);
 104
 105/**
 106 * Setting sets structure for in_set_rf command
 107 *
 108 * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table.
 109 *              This table contains multiple RF setting sets required for RF
 110 *              communication.
 111 *
 112 * @in_*_comm_type: Theses fields set the communication type to be used.
 113 */
 114struct port100_in_rf_setting {
 115        u8 in_send_set_number;
 116        u8 in_send_comm_type;
 117        u8 in_recv_set_number;
 118        u8 in_recv_comm_type;
 119} __packed;
 120
 121#define PORT100_COMM_TYPE_IN_212F 0x01
 122#define PORT100_COMM_TYPE_IN_424F 0x02
 123#define PORT100_COMM_TYPE_IN_106A 0x03
 124#define PORT100_COMM_TYPE_IN_106B 0x07
 125
 126static const struct port100_in_rf_setting in_rf_settings[] = {
 127        [NFC_DIGITAL_RF_TECH_212F] = {
 128                .in_send_set_number = 1,
 129                .in_send_comm_type  = PORT100_COMM_TYPE_IN_212F,
 130                .in_recv_set_number = 15,
 131                .in_recv_comm_type  = PORT100_COMM_TYPE_IN_212F,
 132        },
 133        [NFC_DIGITAL_RF_TECH_424F] = {
 134                .in_send_set_number = 1,
 135                .in_send_comm_type  = PORT100_COMM_TYPE_IN_424F,
 136                .in_recv_set_number = 15,
 137                .in_recv_comm_type  = PORT100_COMM_TYPE_IN_424F,
 138        },
 139        [NFC_DIGITAL_RF_TECH_106A] = {
 140                .in_send_set_number = 2,
 141                .in_send_comm_type  = PORT100_COMM_TYPE_IN_106A,
 142                .in_recv_set_number = 15,
 143                .in_recv_comm_type  = PORT100_COMM_TYPE_IN_106A,
 144        },
 145        [NFC_DIGITAL_RF_TECH_106B] = {
 146                .in_send_set_number = 3,
 147                .in_send_comm_type  = PORT100_COMM_TYPE_IN_106B,
 148                .in_recv_set_number = 15,
 149                .in_recv_comm_type  = PORT100_COMM_TYPE_IN_106B,
 150        },
 151        /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
 152        [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
 153};
 154
 155/**
 156 * Setting sets structure for tg_set_rf command
 157 *
 158 * @tg_set_number: Represents the entry index in the port-100 RF Base Table.
 159 *                 This table contains multiple RF setting sets required for RF
 160 *                 communication. this field is used for both send and receive
 161 *                 settings.
 162 *
 163 * @tg_comm_type: Sets the communication type to be used to send and receive
 164 *                data.
 165 */
 166struct port100_tg_rf_setting {
 167        u8 tg_set_number;
 168        u8 tg_comm_type;
 169} __packed;
 170
 171#define PORT100_COMM_TYPE_TG_106A 0x0B
 172#define PORT100_COMM_TYPE_TG_212F 0x0C
 173#define PORT100_COMM_TYPE_TG_424F 0x0D
 174
 175static const struct port100_tg_rf_setting tg_rf_settings[] = {
 176        [NFC_DIGITAL_RF_TECH_106A] = {
 177                .tg_set_number = 8,
 178                .tg_comm_type = PORT100_COMM_TYPE_TG_106A,
 179        },
 180        [NFC_DIGITAL_RF_TECH_212F] = {
 181                .tg_set_number = 8,
 182                .tg_comm_type = PORT100_COMM_TYPE_TG_212F,
 183        },
 184        [NFC_DIGITAL_RF_TECH_424F] = {
 185                .tg_set_number = 8,
 186                .tg_comm_type = PORT100_COMM_TYPE_TG_424F,
 187        },
 188        /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
 189        [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
 190
 191};
 192
 193#define PORT100_IN_PROT_INITIAL_GUARD_TIME      0x00
 194#define PORT100_IN_PROT_ADD_CRC                 0x01
 195#define PORT100_IN_PROT_CHECK_CRC               0x02
 196#define PORT100_IN_PROT_MULTI_CARD              0x03
 197#define PORT100_IN_PROT_ADD_PARITY              0x04
 198#define PORT100_IN_PROT_CHECK_PARITY            0x05
 199#define PORT100_IN_PROT_BITWISE_AC_RECV_MODE    0x06
 200#define PORT100_IN_PROT_VALID_BIT_NUMBER        0x07
 201#define PORT100_IN_PROT_CRYPTO1                 0x08
 202#define PORT100_IN_PROT_ADD_SOF                 0x09
 203#define PORT100_IN_PROT_CHECK_SOF               0x0A
 204#define PORT100_IN_PROT_ADD_EOF                 0x0B
 205#define PORT100_IN_PROT_CHECK_EOF               0x0C
 206#define PORT100_IN_PROT_DEAF_TIME               0x0E
 207#define PORT100_IN_PROT_CRM                     0x0F
 208#define PORT100_IN_PROT_CRM_MIN_LEN             0x10
 209#define PORT100_IN_PROT_T1_TAG_FRAME            0x11
 210#define PORT100_IN_PROT_RFCA                    0x12
 211#define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13
 212#define PORT100_IN_PROT_END                     0x14
 213
 214#define PORT100_IN_MAX_NUM_PROTOCOLS            19
 215
 216#define PORT100_TG_PROT_TU           0x00
 217#define PORT100_TG_PROT_RF_OFF       0x01
 218#define PORT100_TG_PROT_CRM          0x02
 219#define PORT100_TG_PROT_END          0x03
 220
 221#define PORT100_TG_MAX_NUM_PROTOCOLS 3
 222
 223struct port100_protocol {
 224        u8 number;
 225        u8 value;
 226} __packed;
 227
 228static struct port100_protocol
 229in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
 230        [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
 231                { PORT100_IN_PROT_INITIAL_GUARD_TIME,      6 },
 232                { PORT100_IN_PROT_ADD_CRC,                 0 },
 233                { PORT100_IN_PROT_CHECK_CRC,               0 },
 234                { PORT100_IN_PROT_MULTI_CARD,              0 },
 235                { PORT100_IN_PROT_ADD_PARITY,              0 },
 236                { PORT100_IN_PROT_CHECK_PARITY,            1 },
 237                { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 238                { PORT100_IN_PROT_VALID_BIT_NUMBER,        7 },
 239                { PORT100_IN_PROT_CRYPTO1,                 0 },
 240                { PORT100_IN_PROT_ADD_SOF,                 0 },
 241                { PORT100_IN_PROT_CHECK_SOF,               0 },
 242                { PORT100_IN_PROT_ADD_EOF,                 0 },
 243                { PORT100_IN_PROT_CHECK_EOF,               0 },
 244                { PORT100_IN_PROT_DEAF_TIME,               4 },
 245                { PORT100_IN_PROT_CRM,                     0 },
 246                { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 247                { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 248                { PORT100_IN_PROT_RFCA,                    0 },
 249                { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 250                { PORT100_IN_PROT_END,                     0 },
 251        },
 252        [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
 253                { PORT100_IN_PROT_INITIAL_GUARD_TIME,      6 },
 254                { PORT100_IN_PROT_ADD_CRC,                 0 },
 255                { PORT100_IN_PROT_CHECK_CRC,               0 },
 256                { PORT100_IN_PROT_MULTI_CARD,              0 },
 257                { PORT100_IN_PROT_ADD_PARITY,              1 },
 258                { PORT100_IN_PROT_CHECK_PARITY,            1 },
 259                { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 260                { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
 261                { PORT100_IN_PROT_CRYPTO1,                 0 },
 262                { PORT100_IN_PROT_ADD_SOF,                 0 },
 263                { PORT100_IN_PROT_CHECK_SOF,               0 },
 264                { PORT100_IN_PROT_ADD_EOF,                 0 },
 265                { PORT100_IN_PROT_CHECK_EOF,               0 },
 266                { PORT100_IN_PROT_DEAF_TIME,               4 },
 267                { PORT100_IN_PROT_CRM,                     0 },
 268                { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 269                { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 270                { PORT100_IN_PROT_RFCA,                    0 },
 271                { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 272                { PORT100_IN_PROT_END,                     0 },
 273        },
 274        [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
 275                { PORT100_IN_PROT_INITIAL_GUARD_TIME,      6 },
 276                { PORT100_IN_PROT_ADD_CRC,                 1 },
 277                { PORT100_IN_PROT_CHECK_CRC,               1 },
 278                { PORT100_IN_PROT_MULTI_CARD,              0 },
 279                { PORT100_IN_PROT_ADD_PARITY,              1 },
 280                { PORT100_IN_PROT_CHECK_PARITY,            1 },
 281                { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 282                { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
 283                { PORT100_IN_PROT_CRYPTO1,                 0 },
 284                { PORT100_IN_PROT_ADD_SOF,                 0 },
 285                { PORT100_IN_PROT_CHECK_SOF,               0 },
 286                { PORT100_IN_PROT_ADD_EOF,                 0 },
 287                { PORT100_IN_PROT_CHECK_EOF,               0 },
 288                { PORT100_IN_PROT_DEAF_TIME,               4 },
 289                { PORT100_IN_PROT_CRM,                     0 },
 290                { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 291                { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 292                { PORT100_IN_PROT_RFCA,                    0 },
 293                { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 294                { PORT100_IN_PROT_END,                     0 },
 295        },
 296        [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
 297                /* nfc_digital_framing_nfca_short */
 298                { PORT100_IN_PROT_ADD_CRC,          2 },
 299                { PORT100_IN_PROT_CHECK_CRC,        2 },
 300                { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
 301                { PORT100_IN_PROT_T1_TAG_FRAME,     2 },
 302                { PORT100_IN_PROT_END,              0 },
 303        },
 304        [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
 305                /* nfc_digital_framing_nfca_standard */
 306                { PORT100_IN_PROT_ADD_CRC,   1 },
 307                { PORT100_IN_PROT_CHECK_CRC, 0 },
 308                { PORT100_IN_PROT_END,       0 },
 309        },
 310        [NFC_DIGITAL_FRAMING_NFCA_T4T] = {
 311                /* nfc_digital_framing_nfca_standard_with_crc_a */
 312                { PORT100_IN_PROT_END,       0 },
 313        },
 314        [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
 315                /* nfc_digital_framing_nfca_standard */
 316                { PORT100_IN_PROT_END, 0 },
 317        },
 318        [NFC_DIGITAL_FRAMING_NFCF] = {
 319                { PORT100_IN_PROT_INITIAL_GUARD_TIME,     18 },
 320                { PORT100_IN_PROT_ADD_CRC,                 1 },
 321                { PORT100_IN_PROT_CHECK_CRC,               1 },
 322                { PORT100_IN_PROT_MULTI_CARD,              0 },
 323                { PORT100_IN_PROT_ADD_PARITY,              0 },
 324                { PORT100_IN_PROT_CHECK_PARITY,            0 },
 325                { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 326                { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
 327                { PORT100_IN_PROT_CRYPTO1,                 0 },
 328                { PORT100_IN_PROT_ADD_SOF,                 0 },
 329                { PORT100_IN_PROT_CHECK_SOF,               0 },
 330                { PORT100_IN_PROT_ADD_EOF,                 0 },
 331                { PORT100_IN_PROT_CHECK_EOF,               0 },
 332                { PORT100_IN_PROT_DEAF_TIME,               4 },
 333                { PORT100_IN_PROT_CRM,                     0 },
 334                { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 335                { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 336                { PORT100_IN_PROT_RFCA,                    0 },
 337                { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 338                { PORT100_IN_PROT_END,                     0 },
 339        },
 340        [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
 341                /* nfc_digital_framing_nfcf */
 342                { PORT100_IN_PROT_END, 0 },
 343        },
 344        [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
 345                /* nfc_digital_framing_nfcf */
 346                { PORT100_IN_PROT_INITIAL_GUARD_TIME,     18 },
 347                { PORT100_IN_PROT_ADD_CRC,                 1 },
 348                { PORT100_IN_PROT_CHECK_CRC,               1 },
 349                { PORT100_IN_PROT_MULTI_CARD,              0 },
 350                { PORT100_IN_PROT_ADD_PARITY,              0 },
 351                { PORT100_IN_PROT_CHECK_PARITY,            0 },
 352                { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 353                { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
 354                { PORT100_IN_PROT_CRYPTO1,                 0 },
 355                { PORT100_IN_PROT_ADD_SOF,                 0 },
 356                { PORT100_IN_PROT_CHECK_SOF,               0 },
 357                { PORT100_IN_PROT_ADD_EOF,                 0 },
 358                { PORT100_IN_PROT_CHECK_EOF,               0 },
 359                { PORT100_IN_PROT_DEAF_TIME,               4 },
 360                { PORT100_IN_PROT_CRM,                     0 },
 361                { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 362                { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 363                { PORT100_IN_PROT_RFCA,                    0 },
 364                { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 365                { PORT100_IN_PROT_END,                     0 },
 366        },
 367        [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
 368                { PORT100_IN_PROT_END, 0 },
 369        },
 370        [NFC_DIGITAL_FRAMING_NFCB] = {
 371                { PORT100_IN_PROT_INITIAL_GUARD_TIME,     20 },
 372                { PORT100_IN_PROT_ADD_CRC,                 1 },
 373                { PORT100_IN_PROT_CHECK_CRC,               1 },
 374                { PORT100_IN_PROT_MULTI_CARD,              0 },
 375                { PORT100_IN_PROT_ADD_PARITY,              0 },
 376                { PORT100_IN_PROT_CHECK_PARITY,            0 },
 377                { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 378                { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
 379                { PORT100_IN_PROT_CRYPTO1,                 0 },
 380                { PORT100_IN_PROT_ADD_SOF,                 1 },
 381                { PORT100_IN_PROT_CHECK_SOF,               1 },
 382                { PORT100_IN_PROT_ADD_EOF,                 1 },
 383                { PORT100_IN_PROT_CHECK_EOF,               1 },
 384                { PORT100_IN_PROT_DEAF_TIME,               4 },
 385                { PORT100_IN_PROT_CRM,                     0 },
 386                { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 387                { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 388                { PORT100_IN_PROT_RFCA,                    0 },
 389                { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 390                { PORT100_IN_PROT_END,                     0 },
 391        },
 392        [NFC_DIGITAL_FRAMING_NFCB_T4T] = {
 393                /* nfc_digital_framing_nfcb */
 394                { PORT100_IN_PROT_END,                     0 },
 395        },
 396        /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
 397        [NFC_DIGITAL_FRAMING_LAST] = {
 398                { PORT100_IN_PROT_END, 0 },
 399        },
 400};
 401
 402static struct port100_protocol
 403tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = {
 404        [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
 405                { PORT100_TG_PROT_END, 0 },
 406        },
 407        [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
 408                { PORT100_TG_PROT_END, 0 },
 409        },
 410        [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
 411                { PORT100_TG_PROT_END, 0 },
 412        },
 413        [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
 414                { PORT100_TG_PROT_END, 0 },
 415        },
 416        [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
 417                { PORT100_TG_PROT_END, 0 },
 418        },
 419        [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
 420                { PORT100_TG_PROT_TU,     1 },
 421                { PORT100_TG_PROT_RF_OFF, 0 },
 422                { PORT100_TG_PROT_CRM,    7 },
 423                { PORT100_TG_PROT_END,    0 },
 424        },
 425        [NFC_DIGITAL_FRAMING_NFCF] = {
 426                { PORT100_TG_PROT_END, 0 },
 427        },
 428        [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
 429                { PORT100_TG_PROT_END, 0 },
 430        },
 431        [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
 432                { PORT100_TG_PROT_TU,     1 },
 433                { PORT100_TG_PROT_RF_OFF, 0 },
 434                { PORT100_TG_PROT_CRM,    7 },
 435                { PORT100_TG_PROT_END,    0 },
 436        },
 437        [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
 438                { PORT100_TG_PROT_RF_OFF, 1 },
 439                { PORT100_TG_PROT_END,    0 },
 440        },
 441        /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
 442        [NFC_DIGITAL_FRAMING_LAST] = {
 443                { PORT100_TG_PROT_END,    0 },
 444        },
 445};
 446
 447struct port100 {
 448        struct nfc_digital_dev *nfc_digital_dev;
 449
 450        int skb_headroom;
 451        int skb_tailroom;
 452
 453        struct usb_device *udev;
 454        struct usb_interface *interface;
 455
 456        struct urb *out_urb;
 457        struct urb *in_urb;
 458
 459        /* This mutex protects the out_urb and avoids to submit a new command
 460         * through port100_send_frame_async() while the previous one is being
 461         * canceled through port100_abort_cmd().
 462         */
 463        struct mutex out_urb_lock;
 464
 465        struct work_struct cmd_complete_work;
 466
 467        u8 cmd_type;
 468
 469        /* The digital stack serializes commands to be sent. There is no need
 470         * for any queuing/locking mechanism at driver level.
 471         */
 472        struct port100_cmd *cmd;
 473
 474        bool cmd_cancel;
 475        struct completion cmd_cancel_done;
 476};
 477
 478struct port100_cmd {
 479        u8 code;
 480        int status;
 481        struct sk_buff *req;
 482        struct sk_buff *resp;
 483        int resp_len;
 484        port100_send_async_complete_t  complete_cb;
 485        void *complete_cb_context;
 486};
 487
 488struct port100_frame {
 489        u8 preamble;
 490        __be16 start_frame;
 491        __be16 extended_frame;
 492        __le16 datalen;
 493        u8 datalen_checksum;
 494        u8 data[];
 495} __packed;
 496
 497struct port100_ack_frame {
 498        u8 preamble;
 499        __be16 start_frame;
 500        __be16 ack_frame;
 501        u8 postambule;
 502} __packed;
 503
 504struct port100_cb_arg {
 505        nfc_digital_cmd_complete_t complete_cb;
 506        void *complete_arg;
 507        u8 mdaa;
 508};
 509
 510struct port100_tg_comm_rf_cmd {
 511        __le16 guard_time;
 512        __le16 send_timeout;
 513        u8 mdaa;
 514        u8 nfca_param[6];
 515        u8 nfcf_param[18];
 516        u8 mf_halted;
 517        u8 arae_flag;
 518        __le16 recv_timeout;
 519        u8 data[];
 520} __packed;
 521
 522struct port100_tg_comm_rf_res {
 523        u8 comm_type;
 524        u8 ar_status;
 525        u8 target_activated;
 526        __le32 status;
 527        u8 data[];
 528} __packed;
 529
 530/* The rule: value + checksum = 0 */
 531static inline u8 port100_checksum(u16 value)
 532{
 533        return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1;
 534}
 535
 536/* The rule: sum(data elements) + checksum = 0 */
 537static u8 port100_data_checksum(u8 *data, int datalen)
 538{
 539        u8 sum = 0;
 540        int i;
 541
 542        for (i = 0; i < datalen; i++)
 543                sum += data[i];
 544
 545        return port100_checksum(sum);
 546}
 547
 548static void port100_tx_frame_init(void *_frame, u8 cmd_code)
 549{
 550        struct port100_frame *frame = _frame;
 551
 552        frame->preamble = 0;
 553        frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF);
 554        frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT);
 555        PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT;
 556        PORT100_FRAME_CMD(frame) = cmd_code;
 557        frame->datalen = cpu_to_le16(2);
 558}
 559
 560static void port100_tx_frame_finish(void *_frame)
 561{
 562        struct port100_frame *frame = _frame;
 563
 564        frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen));
 565
 566        PORT100_FRAME_CHECKSUM(frame) =
 567                port100_data_checksum(frame->data, le16_to_cpu(frame->datalen));
 568
 569        PORT100_FRAME_POSTAMBLE(frame) = 0;
 570}
 571
 572static void port100_tx_update_payload_len(void *_frame, int len)
 573{
 574        struct port100_frame *frame = _frame;
 575
 576        frame->datalen = cpu_to_le16(le16_to_cpu(frame->datalen) + len);
 577}
 578
 579static bool port100_rx_frame_is_valid(void *_frame)
 580{
 581        u8 checksum;
 582        struct port100_frame *frame = _frame;
 583
 584        if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) ||
 585            frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT))
 586                return false;
 587
 588        checksum = port100_checksum(le16_to_cpu(frame->datalen));
 589        if (checksum != frame->datalen_checksum)
 590                return false;
 591
 592        checksum = port100_data_checksum(frame->data,
 593                                         le16_to_cpu(frame->datalen));
 594        if (checksum != PORT100_FRAME_CHECKSUM(frame))
 595                return false;
 596
 597        return true;
 598}
 599
 600static bool port100_rx_frame_is_ack(struct port100_ack_frame *frame)
 601{
 602        return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) &&
 603                frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK));
 604}
 605
 606static inline int port100_rx_frame_size(void *frame)
 607{
 608        struct port100_frame *f = frame;
 609
 610        return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) +
 611               PORT100_FRAME_TAIL_LEN;
 612}
 613
 614static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame)
 615{
 616        struct port100_frame *f = frame;
 617
 618        return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code));
 619}
 620
 621static void port100_recv_response(struct urb *urb)
 622{
 623        struct port100 *dev = urb->context;
 624        struct port100_cmd *cmd = dev->cmd;
 625        u8 *in_frame;
 626
 627        cmd->status = urb->status;
 628
 629        switch (urb->status) {
 630        case 0:
 631                break; /* success */
 632        case -ECONNRESET:
 633        case -ENOENT:
 634                nfc_err(&dev->interface->dev,
 635                        "The urb has been canceled (status %d)\n", urb->status);
 636                goto sched_wq;
 637        case -ESHUTDOWN:
 638        default:
 639                nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
 640                        urb->status);
 641                goto sched_wq;
 642        }
 643
 644        in_frame = dev->in_urb->transfer_buffer;
 645
 646        if (!port100_rx_frame_is_valid(in_frame)) {
 647                nfc_err(&dev->interface->dev, "Received an invalid frame\n");
 648                cmd->status = -EIO;
 649                goto sched_wq;
 650        }
 651
 652        print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
 653                             port100_rx_frame_size(in_frame), false);
 654
 655        if (!port100_rx_frame_is_cmd_response(dev, in_frame)) {
 656                nfc_err(&dev->interface->dev,
 657                        "It's not the response to the last command\n");
 658                cmd->status = -EIO;
 659                goto sched_wq;
 660        }
 661
 662sched_wq:
 663        schedule_work(&dev->cmd_complete_work);
 664}
 665
 666static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags)
 667{
 668        dev->in_urb->complete = port100_recv_response;
 669
 670        return usb_submit_urb(dev->in_urb, flags);
 671}
 672
 673static void port100_recv_ack(struct urb *urb)
 674{
 675        struct port100 *dev = urb->context;
 676        struct port100_cmd *cmd = dev->cmd;
 677        struct port100_ack_frame *in_frame;
 678        int rc;
 679
 680        cmd->status = urb->status;
 681
 682        switch (urb->status) {
 683        case 0:
 684                break; /* success */
 685        case -ECONNRESET:
 686        case -ENOENT:
 687                nfc_err(&dev->interface->dev,
 688                        "The urb has been stopped (status %d)\n", urb->status);
 689                goto sched_wq;
 690        case -ESHUTDOWN:
 691        default:
 692                nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
 693                        urb->status);
 694                goto sched_wq;
 695        }
 696
 697        in_frame = dev->in_urb->transfer_buffer;
 698
 699        if (!port100_rx_frame_is_ack(in_frame)) {
 700                nfc_err(&dev->interface->dev, "Received an invalid ack\n");
 701                cmd->status = -EIO;
 702                goto sched_wq;
 703        }
 704
 705        rc = port100_submit_urb_for_response(dev, GFP_ATOMIC);
 706        if (rc) {
 707                nfc_err(&dev->interface->dev,
 708                        "usb_submit_urb failed with result %d\n", rc);
 709                cmd->status = rc;
 710                goto sched_wq;
 711        }
 712
 713        return;
 714
 715sched_wq:
 716        schedule_work(&dev->cmd_complete_work);
 717}
 718
 719static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags)
 720{
 721        dev->in_urb->complete = port100_recv_ack;
 722
 723        return usb_submit_urb(dev->in_urb, flags);
 724}
 725
 726static int port100_send_ack(struct port100 *dev)
 727{
 728        int rc;
 729
 730        mutex_lock(&dev->out_urb_lock);
 731
 732        init_completion(&dev->cmd_cancel_done);
 733
 734        usb_kill_urb(dev->out_urb);
 735
 736        dev->out_urb->transfer_buffer = ack_frame;
 737        dev->out_urb->transfer_buffer_length = sizeof(ack_frame);
 738        rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
 739
 740        /* Set the cmd_cancel flag only if the URB has been successfully
 741         * submitted. It will be reset by the out URB completion callback
 742         * port100_send_complete().
 743         */
 744        dev->cmd_cancel = !rc;
 745
 746        mutex_unlock(&dev->out_urb_lock);
 747
 748        if (!rc)
 749                wait_for_completion(&dev->cmd_cancel_done);
 750
 751        return rc;
 752}
 753
 754static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
 755                                    struct sk_buff *in, int in_len)
 756{
 757        int rc;
 758
 759        mutex_lock(&dev->out_urb_lock);
 760
 761        /* A command cancel frame as been sent through dev->out_urb. Don't try
 762         * to submit a new one.
 763         */
 764        if (dev->cmd_cancel) {
 765                rc = -EAGAIN;
 766                goto exit;
 767        }
 768
 769        dev->out_urb->transfer_buffer = out->data;
 770        dev->out_urb->transfer_buffer_length = out->len;
 771
 772        dev->in_urb->transfer_buffer = in->data;
 773        dev->in_urb->transfer_buffer_length = in_len;
 774
 775        print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1,
 776                             out->data, out->len, false);
 777
 778        rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
 779        if (rc)
 780                goto exit;
 781
 782        rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
 783        if (rc)
 784                usb_unlink_urb(dev->out_urb);
 785
 786exit:
 787        mutex_unlock(&dev->out_urb_lock);
 788
 789        return rc;
 790}
 791
 792static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
 793                                    struct sk_buff *skb)
 794{
 795        /* payload is already there, just update datalen */
 796        int payload_len = skb->len;
 797
 798        skb_push(skb, PORT100_FRAME_HEADER_LEN);
 799        skb_put(skb, PORT100_FRAME_TAIL_LEN);
 800
 801        port100_tx_frame_init(skb->data, cmd_code);
 802        port100_tx_update_payload_len(skb->data, payload_len);
 803        port100_tx_frame_finish(skb->data);
 804}
 805
 806static void port100_send_async_complete(struct port100 *dev)
 807{
 808        struct port100_cmd *cmd = dev->cmd;
 809        int status = cmd->status;
 810
 811        struct sk_buff *req = cmd->req;
 812        struct sk_buff *resp = cmd->resp;
 813
 814        dev_kfree_skb(req);
 815
 816        dev->cmd = NULL;
 817
 818        if (status < 0) {
 819                cmd->complete_cb(dev, cmd->complete_cb_context,
 820                                 ERR_PTR(status));
 821                dev_kfree_skb(resp);
 822                goto done;
 823        }
 824
 825        skb_put(resp, port100_rx_frame_size(resp->data));
 826        skb_pull(resp, PORT100_FRAME_HEADER_LEN);
 827        skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN);
 828
 829        cmd->complete_cb(dev, cmd->complete_cb_context, resp);
 830
 831done:
 832        kfree(cmd);
 833}
 834
 835static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
 836                                struct sk_buff *req,
 837                                port100_send_async_complete_t complete_cb,
 838                                void *complete_cb_context)
 839{
 840        struct port100_cmd *cmd;
 841        struct sk_buff *resp;
 842        int rc;
 843        int  resp_len = PORT100_FRAME_HEADER_LEN +
 844                        PORT100_FRAME_MAX_PAYLOAD_LEN +
 845                        PORT100_FRAME_TAIL_LEN;
 846
 847        if (dev->cmd) {
 848                nfc_err(&dev->interface->dev,
 849                        "A command is still in process\n");
 850                return -EBUSY;
 851        }
 852
 853        resp = alloc_skb(resp_len, GFP_KERNEL);
 854        if (!resp)
 855                return -ENOMEM;
 856
 857        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 858        if (!cmd) {
 859                dev_kfree_skb(resp);
 860                return -ENOMEM;
 861        }
 862
 863        cmd->code = cmd_code;
 864        cmd->req = req;
 865        cmd->resp = resp;
 866        cmd->resp_len = resp_len;
 867        cmd->complete_cb = complete_cb;
 868        cmd->complete_cb_context = complete_cb_context;
 869
 870        port100_build_cmd_frame(dev, cmd_code, req);
 871
 872        dev->cmd = cmd;
 873
 874        rc = port100_send_frame_async(dev, req, resp, resp_len);
 875        if (rc) {
 876                kfree(cmd);
 877                dev_kfree_skb(resp);
 878                dev->cmd = NULL;
 879        }
 880
 881        return rc;
 882}
 883
 884struct port100_sync_cmd_response {
 885        struct sk_buff *resp;
 886        struct completion done;
 887};
 888
 889static void port100_wq_cmd_complete(struct work_struct *work)
 890{
 891        struct port100 *dev = container_of(work, struct port100,
 892                                           cmd_complete_work);
 893
 894        port100_send_async_complete(dev);
 895}
 896
 897static void port100_send_sync_complete(struct port100 *dev, void *_arg,
 898                                      struct sk_buff *resp)
 899{
 900        struct port100_sync_cmd_response *arg = _arg;
 901
 902        arg->resp = resp;
 903        complete(&arg->done);
 904}
 905
 906static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code,
 907                                             struct sk_buff *req)
 908{
 909        int rc;
 910        struct port100_sync_cmd_response arg;
 911
 912        init_completion(&arg.done);
 913
 914        rc = port100_send_cmd_async(dev, cmd_code, req,
 915                                    port100_send_sync_complete, &arg);
 916        if (rc) {
 917                dev_kfree_skb(req);
 918                return ERR_PTR(rc);
 919        }
 920
 921        wait_for_completion(&arg.done);
 922
 923        return arg.resp;
 924}
 925
 926static void port100_send_complete(struct urb *urb)
 927{
 928        struct port100 *dev = urb->context;
 929
 930        if (dev->cmd_cancel) {
 931                dev->cmd_cancel = false;
 932                complete(&dev->cmd_cancel_done);
 933        }
 934
 935        switch (urb->status) {
 936        case 0:
 937                break; /* success */
 938        case -ECONNRESET:
 939        case -ENOENT:
 940                nfc_err(&dev->interface->dev,
 941                        "The urb has been stopped (status %d)\n", urb->status);
 942                break;
 943        case -ESHUTDOWN:
 944        default:
 945                nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
 946                        urb->status);
 947        }
 948}
 949
 950static void port100_abort_cmd(struct nfc_digital_dev *ddev)
 951{
 952        struct port100 *dev = nfc_digital_get_drvdata(ddev);
 953
 954        /* An ack will cancel the last issued command */
 955        port100_send_ack(dev);
 956
 957        /* cancel the urb request */
 958        usb_kill_urb(dev->in_urb);
 959}
 960
 961static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size)
 962{
 963        struct sk_buff *skb;
 964
 965        skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size,
 966                        GFP_KERNEL);
 967        if (skb)
 968                skb_reserve(skb, dev->skb_headroom);
 969
 970        return skb;
 971}
 972
 973static int port100_set_command_type(struct port100 *dev, u8 command_type)
 974{
 975        struct sk_buff *skb;
 976        struct sk_buff *resp;
 977        int rc;
 978
 979        skb = port100_alloc_skb(dev, 1);
 980        if (!skb)
 981                return -ENOMEM;
 982
 983        *skb_put(skb, sizeof(u8)) = command_type;
 984
 985        resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb);
 986        if (IS_ERR(resp))
 987                return PTR_ERR(resp);
 988
 989        rc = resp->data[0];
 990
 991        dev_kfree_skb(resp);
 992
 993        return rc;
 994}
 995
 996static u64 port100_get_command_type_mask(struct port100 *dev)
 997{
 998        struct sk_buff *skb;
 999        struct sk_buff *resp;
1000        u64 mask;
1001
1002        skb = port100_alloc_skb(dev, 0);
1003        if (!skb)
1004                return -ENOMEM;
1005
1006        resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
1007        if (IS_ERR(resp))
1008                return PTR_ERR(resp);
1009
1010        if (resp->len < 8)
1011                mask = 0;
1012        else
1013                mask = be64_to_cpu(*(__be64 *)resp->data);
1014
1015        dev_kfree_skb(resp);
1016
1017        return mask;
1018}
1019
1020static u16 port100_get_firmware_version(struct port100 *dev)
1021{
1022        struct sk_buff *skb;
1023        struct sk_buff *resp;
1024        u16 fw_ver;
1025
1026        skb = port100_alloc_skb(dev, 0);
1027        if (!skb)
1028                return 0;
1029
1030        resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION,
1031                                     skb);
1032        if (IS_ERR(resp))
1033                return 0;
1034
1035        fw_ver = le16_to_cpu(*(__le16 *)resp->data);
1036
1037        dev_kfree_skb(resp);
1038
1039        return fw_ver;
1040}
1041
1042static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
1043{
1044        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1045        struct sk_buff *skb, *resp;
1046
1047        skb = port100_alloc_skb(dev, 1);
1048        if (!skb)
1049                return -ENOMEM;
1050
1051        *skb_put(skb, 1) = on ? 1 : 0;
1052
1053        /* Cancel the last command if the device is being switched off */
1054        if (!on)
1055                port100_abort_cmd(ddev);
1056
1057        resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
1058
1059        if (IS_ERR(resp))
1060                return PTR_ERR(resp);
1061
1062        dev_kfree_skb(resp);
1063
1064        return 0;
1065}
1066
1067static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1068{
1069        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1070        struct sk_buff *skb;
1071        struct sk_buff *resp;
1072        int rc;
1073
1074        if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1075                return -EINVAL;
1076
1077        skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
1078        if (!skb)
1079                return -ENOMEM;
1080
1081        memcpy(skb_put(skb, sizeof(struct port100_in_rf_setting)),
1082               &in_rf_settings[rf],
1083               sizeof(struct port100_in_rf_setting));
1084
1085        resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
1086
1087        if (IS_ERR(resp))
1088                return PTR_ERR(resp);
1089
1090        rc = resp->data[0];
1091
1092        dev_kfree_skb(resp);
1093
1094        return rc;
1095}
1096
1097static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
1098{
1099        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1100        struct port100_protocol *protocols;
1101        struct sk_buff *skb;
1102        struct sk_buff *resp;
1103        int num_protocols;
1104        size_t size;
1105        int rc;
1106
1107        if (param >= NFC_DIGITAL_FRAMING_LAST)
1108                return -EINVAL;
1109
1110        protocols = in_protocols[param];
1111
1112        num_protocols = 0;
1113        while (protocols[num_protocols].number != PORT100_IN_PROT_END)
1114                num_protocols++;
1115
1116        if (!num_protocols)
1117                return 0;
1118
1119        size = sizeof(struct port100_protocol) * num_protocols;
1120
1121        skb = port100_alloc_skb(dev, size);
1122        if (!skb)
1123                return -ENOMEM;
1124
1125        memcpy(skb_put(skb, size), protocols, size);
1126
1127        resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
1128
1129        if (IS_ERR(resp))
1130                return PTR_ERR(resp);
1131
1132        rc = resp->data[0];
1133
1134        dev_kfree_skb(resp);
1135
1136        return rc;
1137}
1138
1139static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
1140                                   int param)
1141{
1142        if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1143                return port100_in_set_rf(ddev, param);
1144
1145        if (type == NFC_DIGITAL_CONFIG_FRAMING)
1146                return port100_in_set_framing(ddev, param);
1147
1148        return -EINVAL;
1149}
1150
1151static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
1152                                       struct sk_buff *resp)
1153{
1154        struct port100_cb_arg *cb_arg = arg;
1155        nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1156        u32 status;
1157        int rc;
1158
1159        if (IS_ERR(resp)) {
1160                rc =  PTR_ERR(resp);
1161                goto exit;
1162        }
1163
1164        if (resp->len < 4) {
1165                nfc_err(&dev->interface->dev,
1166                        "Invalid packet length received\n");
1167                rc = -EIO;
1168                goto error;
1169        }
1170
1171        status = le32_to_cpu(*(__le32 *)resp->data);
1172
1173        skb_pull(resp, sizeof(u32));
1174
1175        if (status == PORT100_CMD_STATUS_TIMEOUT) {
1176                rc = -ETIMEDOUT;
1177                goto error;
1178        }
1179
1180        if (status != PORT100_CMD_STATUS_OK) {
1181                nfc_err(&dev->interface->dev,
1182                        "in_comm_rf failed with status 0x%08x\n", status);
1183                rc = -EIO;
1184                goto error;
1185        }
1186
1187        /* Remove collision bits byte */
1188        skb_pull(resp, 1);
1189
1190        goto exit;
1191
1192error:
1193        kfree_skb(resp);
1194        resp = ERR_PTR(rc);
1195
1196exit:
1197        cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1198
1199        kfree(cb_arg);
1200}
1201
1202static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
1203                               struct sk_buff *skb, u16 _timeout,
1204                               nfc_digital_cmd_complete_t cb, void *arg)
1205{
1206        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1207        struct port100_cb_arg *cb_arg;
1208        __le16 timeout;
1209
1210        cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1211        if (!cb_arg)
1212                return -ENOMEM;
1213
1214        cb_arg->complete_cb = cb;
1215        cb_arg->complete_arg = arg;
1216
1217        timeout = cpu_to_le16(_timeout * 10);
1218
1219        memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
1220
1221        return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
1222                                      port100_in_comm_rf_complete, cb_arg);
1223}
1224
1225static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1226{
1227        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1228        struct sk_buff *skb;
1229        struct sk_buff *resp;
1230        int rc;
1231
1232        if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1233                return -EINVAL;
1234
1235        skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting));
1236        if (!skb)
1237                return -ENOMEM;
1238
1239        memcpy(skb_put(skb, sizeof(struct port100_tg_rf_setting)),
1240               &tg_rf_settings[rf],
1241               sizeof(struct port100_tg_rf_setting));
1242
1243        resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb);
1244
1245        if (IS_ERR(resp))
1246                return PTR_ERR(resp);
1247
1248        rc = resp->data[0];
1249
1250        dev_kfree_skb(resp);
1251
1252        return rc;
1253}
1254
1255static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param)
1256{
1257        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1258        struct port100_protocol *protocols;
1259        struct sk_buff *skb;
1260        struct sk_buff *resp;
1261        int rc;
1262        int num_protocols;
1263        size_t size;
1264
1265        if (param >= NFC_DIGITAL_FRAMING_LAST)
1266                return -EINVAL;
1267
1268        protocols = tg_protocols[param];
1269
1270        num_protocols = 0;
1271        while (protocols[num_protocols].number != PORT100_TG_PROT_END)
1272                num_protocols++;
1273
1274        if (!num_protocols)
1275                return 0;
1276
1277        size = sizeof(struct port100_protocol) * num_protocols;
1278
1279        skb = port100_alloc_skb(dev, size);
1280        if (!skb)
1281                return -ENOMEM;
1282
1283        memcpy(skb_put(skb, size), protocols, size);
1284
1285        resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb);
1286
1287        if (IS_ERR(resp))
1288                return PTR_ERR(resp);
1289
1290        rc = resp->data[0];
1291
1292        dev_kfree_skb(resp);
1293
1294        return rc;
1295}
1296
1297static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
1298                                   int param)
1299{
1300        if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1301                return port100_tg_set_rf(ddev, param);
1302
1303        if (type == NFC_DIGITAL_CONFIG_FRAMING)
1304                return port100_tg_set_framing(ddev, param);
1305
1306        return -EINVAL;
1307}
1308
1309static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated)
1310{
1311        u8 mask;
1312
1313        switch (dev->cmd_type) {
1314        case PORT100_CMD_TYPE_0:
1315                mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK;
1316                break;
1317        case PORT100_CMD_TYPE_1:
1318                mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK |
1319                       PORT100_MDAA_TGT_WAS_ACTIVATED_MASK;
1320                break;
1321        default:
1322                nfc_err(&dev->interface->dev, "Unknown command type\n");
1323                return false;
1324        }
1325
1326        return ((tgt_activated & mask) == mask);
1327}
1328
1329static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg,
1330                                        struct sk_buff *resp)
1331{
1332        u32 status;
1333        struct port100_cb_arg *cb_arg = arg;
1334        nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1335        struct port100_tg_comm_rf_res *hdr;
1336
1337        if (IS_ERR(resp))
1338                goto exit;
1339
1340        hdr = (struct port100_tg_comm_rf_res *)resp->data;
1341
1342        status = le32_to_cpu(hdr->status);
1343
1344        if (cb_arg->mdaa &&
1345            !port100_tg_target_activated(dev, hdr->target_activated)) {
1346                kfree_skb(resp);
1347                resp = ERR_PTR(-ETIMEDOUT);
1348
1349                goto exit;
1350        }
1351
1352        skb_pull(resp, sizeof(struct port100_tg_comm_rf_res));
1353
1354        if (status != PORT100_CMD_STATUS_OK) {
1355                kfree_skb(resp);
1356
1357                if (status == PORT100_CMD_STATUS_TIMEOUT)
1358                        resp = ERR_PTR(-ETIMEDOUT);
1359                else
1360                        resp = ERR_PTR(-EIO);
1361        }
1362
1363exit:
1364        cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1365
1366        kfree(cb_arg);
1367}
1368
1369static int port100_tg_send_cmd(struct nfc_digital_dev *ddev,
1370                               struct sk_buff *skb, u16 timeout,
1371                               nfc_digital_cmd_complete_t cb, void *arg)
1372{
1373        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1374        struct port100_tg_comm_rf_cmd *hdr;
1375        struct port100_cb_arg *cb_arg;
1376
1377        cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1378        if (!cb_arg)
1379                return -ENOMEM;
1380
1381        cb_arg->complete_cb = cb;
1382        cb_arg->complete_arg = arg;
1383
1384        skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1385
1386        hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1387
1388        memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1389        hdr->guard_time = cpu_to_le16(500);
1390        hdr->send_timeout = cpu_to_le16(0xFFFF);
1391        hdr->recv_timeout = cpu_to_le16(timeout);
1392
1393        return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1394                                      port100_tg_comm_rf_complete, cb_arg);
1395}
1396
1397static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
1398                               struct digital_tg_mdaa_params *params,
1399                               u16 timeout,
1400                               nfc_digital_cmd_complete_t cb, void *arg)
1401{
1402        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1403        struct port100_tg_comm_rf_cmd *hdr;
1404        struct port100_cb_arg *cb_arg;
1405        struct sk_buff *skb;
1406        int rc;
1407
1408        rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
1409                                     NFC_DIGITAL_RF_TECH_106A);
1410        if (rc)
1411                return rc;
1412
1413        rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1414                                     NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
1415        if (rc)
1416                return rc;
1417
1418        cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1419        if (!cb_arg)
1420                return -ENOMEM;
1421
1422        cb_arg->complete_cb = cb;
1423        cb_arg->complete_arg = arg;
1424        cb_arg->mdaa = 1;
1425
1426        skb = port100_alloc_skb(dev, 0);
1427        if (!skb) {
1428                kfree(cb_arg);
1429                return -ENOMEM;
1430        }
1431
1432        skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1433        hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1434
1435        memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1436
1437        hdr->guard_time = 0;
1438        hdr->send_timeout = cpu_to_le16(0xFFFF);
1439        hdr->mdaa = 1;
1440        hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF;
1441        hdr->nfca_param[1] = params->sens_res & 0xFF;
1442        memcpy(hdr->nfca_param + 2, params->nfcid1, 3);
1443        hdr->nfca_param[5] = params->sel_res;
1444        memcpy(hdr->nfcf_param, params->nfcid2, 8);
1445        hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF;
1446        hdr->nfcf_param[17] = params->sc & 0xFF;
1447        hdr->recv_timeout = cpu_to_le16(timeout);
1448
1449        return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1450                                      port100_tg_comm_rf_complete, cb_arg);
1451}
1452
1453static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout,
1454                          nfc_digital_cmd_complete_t cb, void *arg)
1455{
1456        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1457        struct sk_buff *skb;
1458
1459        skb = port100_alloc_skb(dev, 0);
1460        if (!skb)
1461                return -ENOMEM;
1462
1463        return port100_tg_send_cmd(ddev, skb, timeout, cb, arg);
1464}
1465
1466static struct nfc_digital_ops port100_digital_ops = {
1467        .in_configure_hw = port100_in_configure_hw,
1468        .in_send_cmd = port100_in_send_cmd,
1469
1470        .tg_listen_mdaa = port100_listen_mdaa,
1471        .tg_listen = port100_listen,
1472        .tg_configure_hw = port100_tg_configure_hw,
1473        .tg_send_cmd = port100_tg_send_cmd,
1474
1475        .switch_rf = port100_switch_rf,
1476        .abort_cmd = port100_abort_cmd,
1477};
1478
1479static const struct usb_device_id port100_table[] = {
1480        { USB_DEVICE(SONY_VENDOR_ID, RCS380_PRODUCT_ID), },
1481        { }
1482};
1483MODULE_DEVICE_TABLE(usb, port100_table);
1484
1485static int port100_probe(struct usb_interface *interface,
1486                         const struct usb_device_id *id)
1487{
1488        struct port100 *dev;
1489        int rc;
1490        struct usb_host_interface *iface_desc;
1491        struct usb_endpoint_descriptor *endpoint;
1492        int in_endpoint;
1493        int out_endpoint;
1494        u16 fw_version;
1495        u64 cmd_type_mask;
1496        int i;
1497
1498        dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL);
1499        if (!dev)
1500                return -ENOMEM;
1501
1502        mutex_init(&dev->out_urb_lock);
1503        dev->udev = usb_get_dev(interface_to_usbdev(interface));
1504        dev->interface = interface;
1505        usb_set_intfdata(interface, dev);
1506
1507        in_endpoint = out_endpoint = 0;
1508        iface_desc = interface->cur_altsetting;
1509        for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1510                endpoint = &iface_desc->endpoint[i].desc;
1511
1512                if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
1513                        in_endpoint = endpoint->bEndpointAddress;
1514
1515                if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
1516                        out_endpoint = endpoint->bEndpointAddress;
1517        }
1518
1519        if (!in_endpoint || !out_endpoint) {
1520                nfc_err(&interface->dev,
1521                        "Could not find bulk-in or bulk-out endpoint\n");
1522                rc = -ENODEV;
1523                goto error;
1524        }
1525
1526        dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1527        dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1528
1529        if (!dev->in_urb || !dev->out_urb) {
1530                nfc_err(&interface->dev, "Could not allocate USB URBs\n");
1531                rc = -ENOMEM;
1532                goto error;
1533        }
1534
1535        usb_fill_bulk_urb(dev->in_urb, dev->udev,
1536                          usb_rcvbulkpipe(dev->udev, in_endpoint),
1537                          NULL, 0, NULL, dev);
1538        usb_fill_bulk_urb(dev->out_urb, dev->udev,
1539                          usb_sndbulkpipe(dev->udev, out_endpoint),
1540                          NULL, 0, port100_send_complete, dev);
1541
1542        dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
1543                            PORT100_COMM_RF_HEAD_MAX_LEN;
1544        dev->skb_tailroom = PORT100_FRAME_TAIL_LEN;
1545
1546        INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete);
1547
1548        /* The first thing to do with the Port-100 is to set the command type
1549         * to be used. If supported we use command type 1. 0 otherwise.
1550         */
1551        cmd_type_mask = port100_get_command_type_mask(dev);
1552        if (!cmd_type_mask) {
1553                nfc_err(&interface->dev,
1554                        "Could not get supported command types\n");
1555                rc = -ENODEV;
1556                goto error;
1557        }
1558
1559        if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1))
1560                dev->cmd_type = PORT100_CMD_TYPE_1;
1561        else
1562                dev->cmd_type = PORT100_CMD_TYPE_0;
1563
1564        rc = port100_set_command_type(dev, dev->cmd_type);
1565        if (rc) {
1566                nfc_err(&interface->dev,
1567                        "The device does not support command type %u\n",
1568                        dev->cmd_type);
1569                goto error;
1570        }
1571
1572        fw_version = port100_get_firmware_version(dev);
1573        if (!fw_version)
1574                nfc_err(&interface->dev,
1575                        "Could not get device firmware version\n");
1576
1577        nfc_info(&interface->dev,
1578                 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n",
1579                 (fw_version & 0xFF00) >> 8, fw_version & 0xFF);
1580
1581        dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops,
1582                                                           PORT100_PROTOCOLS,
1583                                                           PORT100_CAPABILITIES,
1584                                                           dev->skb_headroom,
1585                                                           dev->skb_tailroom);
1586        if (!dev->nfc_digital_dev) {
1587                nfc_err(&interface->dev,
1588                        "Could not allocate nfc_digital_dev\n");
1589                rc = -ENOMEM;
1590                goto error;
1591        }
1592
1593        nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev);
1594        nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
1595
1596        rc = nfc_digital_register_device(dev->nfc_digital_dev);
1597        if (rc) {
1598                nfc_err(&interface->dev,
1599                        "Could not register digital device\n");
1600                goto free_nfc_dev;
1601        }
1602
1603        return 0;
1604
1605free_nfc_dev:
1606        nfc_digital_free_device(dev->nfc_digital_dev);
1607
1608error:
1609        usb_free_urb(dev->in_urb);
1610        usb_free_urb(dev->out_urb);
1611        usb_put_dev(dev->udev);
1612
1613        return rc;
1614}
1615
1616static void port100_disconnect(struct usb_interface *interface)
1617{
1618        struct port100 *dev;
1619
1620        dev = usb_get_intfdata(interface);
1621        usb_set_intfdata(interface, NULL);
1622
1623        nfc_digital_unregister_device(dev->nfc_digital_dev);
1624        nfc_digital_free_device(dev->nfc_digital_dev);
1625
1626        usb_kill_urb(dev->in_urb);
1627        usb_kill_urb(dev->out_urb);
1628
1629        usb_free_urb(dev->in_urb);
1630        usb_free_urb(dev->out_urb);
1631        usb_put_dev(dev->udev);
1632
1633        kfree(dev->cmd);
1634
1635        nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected\n");
1636}
1637
1638static struct usb_driver port100_driver = {
1639        .name =         "port100",
1640        .probe =        port100_probe,
1641        .disconnect =   port100_disconnect,
1642        .id_table =     port100_table,
1643};
1644
1645module_usb_driver(port100_driver);
1646
1647MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
1648MODULE_VERSION(VERSION);
1649MODULE_LICENSE("GPL");
1650
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