linux/drivers/nfc/port100.c
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   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * Sony NFC Port-100 Series driver
   4 * Copyright (c) 2013, Intel Corporation.
   5 *
   6 * Partly based/Inspired by Stephen Tiedemann's nfcpy
   7 */
   8
   9#include <linux/module.h>
  10#include <linux/usb.h>
  11#include <net/nfc/digital.h>
  12
  13#define VERSION "0.1"
  14
  15#define SONY_VENDOR_ID          0x054c
  16#define RCS380S_PRODUCT_ID      0x06c1
  17#define RCS380P_PRODUCT_ID      0x06c3
  18
  19#define PORT100_PROTOCOLS (NFC_PROTO_JEWEL_MASK    | \
  20                           NFC_PROTO_MIFARE_MASK   | \
  21                           NFC_PROTO_FELICA_MASK   | \
  22                           NFC_PROTO_NFC_DEP_MASK  | \
  23                           NFC_PROTO_ISO14443_MASK | \
  24                           NFC_PROTO_ISO14443_B_MASK)
  25
  26#define PORT100_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \
  27                              NFC_DIGITAL_DRV_CAPS_TG_CRC)
  28
  29/* Standard port100 frame definitions */
  30#define PORT100_FRAME_HEADER_LEN (sizeof(struct port100_frame) \
  31                                  + 2) /* data[0] CC, data[1] SCC */
  32#define PORT100_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
  33
  34#define PORT100_COMM_RF_HEAD_MAX_LEN (sizeof(struct port100_tg_comm_rf_cmd))
  35
  36/*
  37 * Max extended frame payload len, excluding CC and SCC
  38 * which are already in PORT100_FRAME_HEADER_LEN.
  39 */
  40#define PORT100_FRAME_MAX_PAYLOAD_LEN 1001
  41
  42#define PORT100_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2),
  43                                    Postamble (1) */
  44static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = {
  45        0x00, 0x00, 0xff, 0x00, 0xff, 0x00
  46};
  47
  48#define PORT100_FRAME_CHECKSUM(f) (f->data[le16_to_cpu(f->datalen)])
  49#define PORT100_FRAME_POSTAMBLE(f) (f->data[le16_to_cpu(f->datalen) + 1])
  50
  51/* start of frame */
  52#define PORT100_FRAME_SOF       0x00FF
  53#define PORT100_FRAME_EXT       0xFFFF
  54#define PORT100_FRAME_ACK       0x00FF
  55
  56/* Port-100 command: in or out */
  57#define PORT100_FRAME_DIRECTION(f) (f->data[0]) /* CC */
  58#define PORT100_FRAME_DIR_OUT 0xD6
  59#define PORT100_FRAME_DIR_IN  0xD7
  60
  61/* Port-100 sub-command */
  62#define PORT100_FRAME_CMD(f) (f->data[1]) /* SCC */
  63
  64#define PORT100_CMD_GET_FIRMWARE_VERSION 0x20
  65#define PORT100_CMD_GET_COMMAND_TYPE     0x28
  66#define PORT100_CMD_SET_COMMAND_TYPE     0x2A
  67
  68#define PORT100_CMD_IN_SET_RF       0x00
  69#define PORT100_CMD_IN_SET_PROTOCOL 0x02
  70#define PORT100_CMD_IN_COMM_RF      0x04
  71
  72#define PORT100_CMD_TG_SET_RF       0x40
  73#define PORT100_CMD_TG_SET_PROTOCOL 0x42
  74#define PORT100_CMD_TG_SET_RF_OFF   0x46
  75#define PORT100_CMD_TG_COMM_RF      0x48
  76
  77#define PORT100_CMD_SWITCH_RF       0x06
  78
  79#define PORT100_CMD_RESPONSE(cmd) (cmd + 1)
  80
  81#define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \
  82        ((mask) & (0x01 << (cmd_type)))
  83#define PORT100_CMD_TYPE_0      0
  84#define PORT100_CMD_TYPE_1      1
  85
  86#define PORT100_CMD_STATUS_OK      0x00
  87#define PORT100_CMD_STATUS_TIMEOUT 0x80
  88
  89#define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01
  90#define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK      0x02
  91
  92struct port100;
  93
  94typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg,
  95                                              struct sk_buff *resp);
  96
  97/*
  98 * Setting sets structure for in_set_rf command
  99 *
 100 * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table.
 101 *              This table contains multiple RF setting sets required for RF
 102 *              communication.
 103 *
 104 * @in_*_comm_type: Theses fields set the communication type to be used.
 105 */
 106struct port100_in_rf_setting {
 107        u8 in_send_set_number;
 108        u8 in_send_comm_type;
 109        u8 in_recv_set_number;
 110        u8 in_recv_comm_type;
 111} __packed;
 112
 113#define PORT100_COMM_TYPE_IN_212F 0x01
 114#define PORT100_COMM_TYPE_IN_424F 0x02
 115#define PORT100_COMM_TYPE_IN_106A 0x03
 116#define PORT100_COMM_TYPE_IN_106B 0x07
 117
 118static const struct port100_in_rf_setting in_rf_settings[] = {
 119        [NFC_DIGITAL_RF_TECH_212F] = {
 120                .in_send_set_number = 1,
 121                .in_send_comm_type  = PORT100_COMM_TYPE_IN_212F,
 122                .in_recv_set_number = 15,
 123                .in_recv_comm_type  = PORT100_COMM_TYPE_IN_212F,
 124        },
 125        [NFC_DIGITAL_RF_TECH_424F] = {
 126                .in_send_set_number = 1,
 127                .in_send_comm_type  = PORT100_COMM_TYPE_IN_424F,
 128                .in_recv_set_number = 15,
 129                .in_recv_comm_type  = PORT100_COMM_TYPE_IN_424F,
 130        },
 131        [NFC_DIGITAL_RF_TECH_106A] = {
 132                .in_send_set_number = 2,
 133                .in_send_comm_type  = PORT100_COMM_TYPE_IN_106A,
 134                .in_recv_set_number = 15,
 135                .in_recv_comm_type  = PORT100_COMM_TYPE_IN_106A,
 136        },
 137        [NFC_DIGITAL_RF_TECH_106B] = {
 138                .in_send_set_number = 3,
 139                .in_send_comm_type  = PORT100_COMM_TYPE_IN_106B,
 140                .in_recv_set_number = 15,
 141                .in_recv_comm_type  = PORT100_COMM_TYPE_IN_106B,
 142        },
 143        /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
 144        [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
 145};
 146
 147/**
 148 * struct port100_tg_rf_setting - Setting sets structure for tg_set_rf command
 149 *
 150 * @tg_set_number: Represents the entry index in the port-100 RF Base Table.
 151 *                 This table contains multiple RF setting sets required for RF
 152 *                 communication. this field is used for both send and receive
 153 *                 settings.
 154 *
 155 * @tg_comm_type: Sets the communication type to be used to send and receive
 156 *                data.
 157 */
 158struct port100_tg_rf_setting {
 159        u8 tg_set_number;
 160        u8 tg_comm_type;
 161} __packed;
 162
 163#define PORT100_COMM_TYPE_TG_106A 0x0B
 164#define PORT100_COMM_TYPE_TG_212F 0x0C
 165#define PORT100_COMM_TYPE_TG_424F 0x0D
 166
 167static const struct port100_tg_rf_setting tg_rf_settings[] = {
 168        [NFC_DIGITAL_RF_TECH_106A] = {
 169                .tg_set_number = 8,
 170                .tg_comm_type = PORT100_COMM_TYPE_TG_106A,
 171        },
 172        [NFC_DIGITAL_RF_TECH_212F] = {
 173                .tg_set_number = 8,
 174                .tg_comm_type = PORT100_COMM_TYPE_TG_212F,
 175        },
 176        [NFC_DIGITAL_RF_TECH_424F] = {
 177                .tg_set_number = 8,
 178                .tg_comm_type = PORT100_COMM_TYPE_TG_424F,
 179        },
 180        /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */
 181        [NFC_DIGITAL_RF_TECH_LAST] = { 0 },
 182
 183};
 184
 185#define PORT100_IN_PROT_INITIAL_GUARD_TIME      0x00
 186#define PORT100_IN_PROT_ADD_CRC                 0x01
 187#define PORT100_IN_PROT_CHECK_CRC               0x02
 188#define PORT100_IN_PROT_MULTI_CARD              0x03
 189#define PORT100_IN_PROT_ADD_PARITY              0x04
 190#define PORT100_IN_PROT_CHECK_PARITY            0x05
 191#define PORT100_IN_PROT_BITWISE_AC_RECV_MODE    0x06
 192#define PORT100_IN_PROT_VALID_BIT_NUMBER        0x07
 193#define PORT100_IN_PROT_CRYPTO1                 0x08
 194#define PORT100_IN_PROT_ADD_SOF                 0x09
 195#define PORT100_IN_PROT_CHECK_SOF               0x0A
 196#define PORT100_IN_PROT_ADD_EOF                 0x0B
 197#define PORT100_IN_PROT_CHECK_EOF               0x0C
 198#define PORT100_IN_PROT_DEAF_TIME               0x0E
 199#define PORT100_IN_PROT_CRM                     0x0F
 200#define PORT100_IN_PROT_CRM_MIN_LEN             0x10
 201#define PORT100_IN_PROT_T1_TAG_FRAME            0x11
 202#define PORT100_IN_PROT_RFCA                    0x12
 203#define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13
 204#define PORT100_IN_PROT_END                     0x14
 205
 206#define PORT100_IN_MAX_NUM_PROTOCOLS            19
 207
 208#define PORT100_TG_PROT_TU           0x00
 209#define PORT100_TG_PROT_RF_OFF       0x01
 210#define PORT100_TG_PROT_CRM          0x02
 211#define PORT100_TG_PROT_END          0x03
 212
 213#define PORT100_TG_MAX_NUM_PROTOCOLS 3
 214
 215struct port100_protocol {
 216        u8 number;
 217        u8 value;
 218} __packed;
 219
 220static struct port100_protocol
 221in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = {
 222        [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
 223                { PORT100_IN_PROT_INITIAL_GUARD_TIME,      6 },
 224                { PORT100_IN_PROT_ADD_CRC,                 0 },
 225                { PORT100_IN_PROT_CHECK_CRC,               0 },
 226                { PORT100_IN_PROT_MULTI_CARD,              0 },
 227                { PORT100_IN_PROT_ADD_PARITY,              0 },
 228                { PORT100_IN_PROT_CHECK_PARITY,            1 },
 229                { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 230                { PORT100_IN_PROT_VALID_BIT_NUMBER,        7 },
 231                { PORT100_IN_PROT_CRYPTO1,                 0 },
 232                { PORT100_IN_PROT_ADD_SOF,                 0 },
 233                { PORT100_IN_PROT_CHECK_SOF,               0 },
 234                { PORT100_IN_PROT_ADD_EOF,                 0 },
 235                { PORT100_IN_PROT_CHECK_EOF,               0 },
 236                { PORT100_IN_PROT_DEAF_TIME,               4 },
 237                { PORT100_IN_PROT_CRM,                     0 },
 238                { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 239                { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 240                { PORT100_IN_PROT_RFCA,                    0 },
 241                { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 242                { PORT100_IN_PROT_END,                     0 },
 243        },
 244        [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
 245                { PORT100_IN_PROT_INITIAL_GUARD_TIME,      6 },
 246                { PORT100_IN_PROT_ADD_CRC,                 0 },
 247                { PORT100_IN_PROT_CHECK_CRC,               0 },
 248                { PORT100_IN_PROT_MULTI_CARD,              0 },
 249                { PORT100_IN_PROT_ADD_PARITY,              1 },
 250                { PORT100_IN_PROT_CHECK_PARITY,            1 },
 251                { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 252                { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
 253                { PORT100_IN_PROT_CRYPTO1,                 0 },
 254                { PORT100_IN_PROT_ADD_SOF,                 0 },
 255                { PORT100_IN_PROT_CHECK_SOF,               0 },
 256                { PORT100_IN_PROT_ADD_EOF,                 0 },
 257                { PORT100_IN_PROT_CHECK_EOF,               0 },
 258                { PORT100_IN_PROT_DEAF_TIME,               4 },
 259                { PORT100_IN_PROT_CRM,                     0 },
 260                { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 261                { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 262                { PORT100_IN_PROT_RFCA,                    0 },
 263                { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 264                { PORT100_IN_PROT_END,                     0 },
 265        },
 266        [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
 267                { PORT100_IN_PROT_INITIAL_GUARD_TIME,      6 },
 268                { PORT100_IN_PROT_ADD_CRC,                 1 },
 269                { PORT100_IN_PROT_CHECK_CRC,               1 },
 270                { PORT100_IN_PROT_MULTI_CARD,              0 },
 271                { PORT100_IN_PROT_ADD_PARITY,              1 },
 272                { PORT100_IN_PROT_CHECK_PARITY,            1 },
 273                { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 274                { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
 275                { PORT100_IN_PROT_CRYPTO1,                 0 },
 276                { PORT100_IN_PROT_ADD_SOF,                 0 },
 277                { PORT100_IN_PROT_CHECK_SOF,               0 },
 278                { PORT100_IN_PROT_ADD_EOF,                 0 },
 279                { PORT100_IN_PROT_CHECK_EOF,               0 },
 280                { PORT100_IN_PROT_DEAF_TIME,               4 },
 281                { PORT100_IN_PROT_CRM,                     0 },
 282                { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 283                { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 284                { PORT100_IN_PROT_RFCA,                    0 },
 285                { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 286                { PORT100_IN_PROT_END,                     0 },
 287        },
 288        [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
 289                /* nfc_digital_framing_nfca_short */
 290                { PORT100_IN_PROT_ADD_CRC,          2 },
 291                { PORT100_IN_PROT_CHECK_CRC,        2 },
 292                { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 },
 293                { PORT100_IN_PROT_T1_TAG_FRAME,     2 },
 294                { PORT100_IN_PROT_END,              0 },
 295        },
 296        [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
 297                /* nfc_digital_framing_nfca_standard */
 298                { PORT100_IN_PROT_ADD_CRC,   1 },
 299                { PORT100_IN_PROT_CHECK_CRC, 0 },
 300                { PORT100_IN_PROT_END,       0 },
 301        },
 302        [NFC_DIGITAL_FRAMING_NFCA_T4T] = {
 303                /* nfc_digital_framing_nfca_standard_with_crc_a */
 304                { PORT100_IN_PROT_END,       0 },
 305        },
 306        [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
 307                /* nfc_digital_framing_nfca_standard */
 308                { PORT100_IN_PROT_END, 0 },
 309        },
 310        [NFC_DIGITAL_FRAMING_NFCF] = {
 311                { PORT100_IN_PROT_INITIAL_GUARD_TIME,     18 },
 312                { PORT100_IN_PROT_ADD_CRC,                 1 },
 313                { PORT100_IN_PROT_CHECK_CRC,               1 },
 314                { PORT100_IN_PROT_MULTI_CARD,              0 },
 315                { PORT100_IN_PROT_ADD_PARITY,              0 },
 316                { PORT100_IN_PROT_CHECK_PARITY,            0 },
 317                { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 318                { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
 319                { PORT100_IN_PROT_CRYPTO1,                 0 },
 320                { PORT100_IN_PROT_ADD_SOF,                 0 },
 321                { PORT100_IN_PROT_CHECK_SOF,               0 },
 322                { PORT100_IN_PROT_ADD_EOF,                 0 },
 323                { PORT100_IN_PROT_CHECK_EOF,               0 },
 324                { PORT100_IN_PROT_DEAF_TIME,               4 },
 325                { PORT100_IN_PROT_CRM,                     0 },
 326                { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 327                { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 328                { PORT100_IN_PROT_RFCA,                    0 },
 329                { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 330                { PORT100_IN_PROT_END,                     0 },
 331        },
 332        [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
 333                /* nfc_digital_framing_nfcf */
 334                { PORT100_IN_PROT_END, 0 },
 335        },
 336        [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
 337                /* nfc_digital_framing_nfcf */
 338                { PORT100_IN_PROT_INITIAL_GUARD_TIME,     18 },
 339                { PORT100_IN_PROT_ADD_CRC,                 1 },
 340                { PORT100_IN_PROT_CHECK_CRC,               1 },
 341                { PORT100_IN_PROT_MULTI_CARD,              0 },
 342                { PORT100_IN_PROT_ADD_PARITY,              0 },
 343                { PORT100_IN_PROT_CHECK_PARITY,            0 },
 344                { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 345                { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
 346                { PORT100_IN_PROT_CRYPTO1,                 0 },
 347                { PORT100_IN_PROT_ADD_SOF,                 0 },
 348                { PORT100_IN_PROT_CHECK_SOF,               0 },
 349                { PORT100_IN_PROT_ADD_EOF,                 0 },
 350                { PORT100_IN_PROT_CHECK_EOF,               0 },
 351                { PORT100_IN_PROT_DEAF_TIME,               4 },
 352                { PORT100_IN_PROT_CRM,                     0 },
 353                { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 354                { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 355                { PORT100_IN_PROT_RFCA,                    0 },
 356                { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 357                { PORT100_IN_PROT_END,                     0 },
 358        },
 359        [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
 360                { PORT100_IN_PROT_END, 0 },
 361        },
 362        [NFC_DIGITAL_FRAMING_NFCB] = {
 363                { PORT100_IN_PROT_INITIAL_GUARD_TIME,     20 },
 364                { PORT100_IN_PROT_ADD_CRC,                 1 },
 365                { PORT100_IN_PROT_CHECK_CRC,               1 },
 366                { PORT100_IN_PROT_MULTI_CARD,              0 },
 367                { PORT100_IN_PROT_ADD_PARITY,              0 },
 368                { PORT100_IN_PROT_CHECK_PARITY,            0 },
 369                { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 370                { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
 371                { PORT100_IN_PROT_CRYPTO1,                 0 },
 372                { PORT100_IN_PROT_ADD_SOF,                 1 },
 373                { PORT100_IN_PROT_CHECK_SOF,               1 },
 374                { PORT100_IN_PROT_ADD_EOF,                 1 },
 375                { PORT100_IN_PROT_CHECK_EOF,               1 },
 376                { PORT100_IN_PROT_DEAF_TIME,               4 },
 377                { PORT100_IN_PROT_CRM,                     0 },
 378                { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 379                { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 380                { PORT100_IN_PROT_RFCA,                    0 },
 381                { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 382                { PORT100_IN_PROT_END,                     0 },
 383        },
 384        [NFC_DIGITAL_FRAMING_NFCB_T4T] = {
 385                /* nfc_digital_framing_nfcb */
 386                { PORT100_IN_PROT_END,                     0 },
 387        },
 388        /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
 389        [NFC_DIGITAL_FRAMING_LAST] = {
 390                { PORT100_IN_PROT_END, 0 },
 391        },
 392};
 393
 394static struct port100_protocol
 395tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = {
 396        [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
 397                { PORT100_TG_PROT_END, 0 },
 398        },
 399        [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
 400                { PORT100_TG_PROT_END, 0 },
 401        },
 402        [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
 403                { PORT100_TG_PROT_END, 0 },
 404        },
 405        [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
 406                { PORT100_TG_PROT_END, 0 },
 407        },
 408        [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
 409                { PORT100_TG_PROT_END, 0 },
 410        },
 411        [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
 412                { PORT100_TG_PROT_TU,     1 },
 413                { PORT100_TG_PROT_RF_OFF, 0 },
 414                { PORT100_TG_PROT_CRM,    7 },
 415                { PORT100_TG_PROT_END,    0 },
 416        },
 417        [NFC_DIGITAL_FRAMING_NFCF] = {
 418                { PORT100_TG_PROT_END, 0 },
 419        },
 420        [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
 421                { PORT100_TG_PROT_END, 0 },
 422        },
 423        [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
 424                { PORT100_TG_PROT_TU,     1 },
 425                { PORT100_TG_PROT_RF_OFF, 0 },
 426                { PORT100_TG_PROT_CRM,    7 },
 427                { PORT100_TG_PROT_END,    0 },
 428        },
 429        [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
 430                { PORT100_TG_PROT_RF_OFF, 1 },
 431                { PORT100_TG_PROT_END,    0 },
 432        },
 433        /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
 434        [NFC_DIGITAL_FRAMING_LAST] = {
 435                { PORT100_TG_PROT_END,    0 },
 436        },
 437};
 438
 439struct port100 {
 440        struct nfc_digital_dev *nfc_digital_dev;
 441
 442        int skb_headroom;
 443        int skb_tailroom;
 444
 445        struct usb_device *udev;
 446        struct usb_interface *interface;
 447
 448        struct urb *out_urb;
 449        struct urb *in_urb;
 450
 451        /* This mutex protects the out_urb and avoids to submit a new command
 452         * through port100_send_frame_async() while the previous one is being
 453         * canceled through port100_abort_cmd().
 454         */
 455        struct mutex out_urb_lock;
 456
 457        struct work_struct cmd_complete_work;
 458
 459        u8 cmd_type;
 460
 461        /* The digital stack serializes commands to be sent. There is no need
 462         * for any queuing/locking mechanism at driver level.
 463         */
 464        struct port100_cmd *cmd;
 465
 466        bool cmd_cancel;
 467        struct completion cmd_cancel_done;
 468};
 469
 470struct port100_cmd {
 471        u8 code;
 472        int status;
 473        struct sk_buff *req;
 474        struct sk_buff *resp;
 475        int resp_len;
 476        port100_send_async_complete_t  complete_cb;
 477        void *complete_cb_context;
 478};
 479
 480struct port100_frame {
 481        u8 preamble;
 482        __be16 start_frame;
 483        __be16 extended_frame;
 484        __le16 datalen;
 485        u8 datalen_checksum;
 486        u8 data[];
 487} __packed;
 488
 489struct port100_ack_frame {
 490        u8 preamble;
 491        __be16 start_frame;
 492        __be16 ack_frame;
 493        u8 postambule;
 494} __packed;
 495
 496struct port100_cb_arg {
 497        nfc_digital_cmd_complete_t complete_cb;
 498        void *complete_arg;
 499        u8 mdaa;
 500};
 501
 502struct port100_tg_comm_rf_cmd {
 503        __le16 guard_time;
 504        __le16 send_timeout;
 505        u8 mdaa;
 506        u8 nfca_param[6];
 507        u8 nfcf_param[18];
 508        u8 mf_halted;
 509        u8 arae_flag;
 510        __le16 recv_timeout;
 511        u8 data[];
 512} __packed;
 513
 514struct port100_tg_comm_rf_res {
 515        u8 comm_type;
 516        u8 ar_status;
 517        u8 target_activated;
 518        __le32 status;
 519        u8 data[];
 520} __packed;
 521
 522/* The rule: value + checksum = 0 */
 523static inline u8 port100_checksum(u16 value)
 524{
 525        return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1;
 526}
 527
 528/* The rule: sum(data elements) + checksum = 0 */
 529static u8 port100_data_checksum(u8 *data, int datalen)
 530{
 531        u8 sum = 0;
 532        int i;
 533
 534        for (i = 0; i < datalen; i++)
 535                sum += data[i];
 536
 537        return port100_checksum(sum);
 538}
 539
 540static void port100_tx_frame_init(void *_frame, u8 cmd_code)
 541{
 542        struct port100_frame *frame = _frame;
 543
 544        frame->preamble = 0;
 545        frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF);
 546        frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT);
 547        PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT;
 548        PORT100_FRAME_CMD(frame) = cmd_code;
 549        frame->datalen = cpu_to_le16(2);
 550}
 551
 552static void port100_tx_frame_finish(void *_frame)
 553{
 554        struct port100_frame *frame = _frame;
 555
 556        frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen));
 557
 558        PORT100_FRAME_CHECKSUM(frame) =
 559                port100_data_checksum(frame->data, le16_to_cpu(frame->datalen));
 560
 561        PORT100_FRAME_POSTAMBLE(frame) = 0;
 562}
 563
 564static void port100_tx_update_payload_len(void *_frame, int len)
 565{
 566        struct port100_frame *frame = _frame;
 567
 568        le16_add_cpu(&frame->datalen, len);
 569}
 570
 571static bool port100_rx_frame_is_valid(void *_frame)
 572{
 573        u8 checksum;
 574        struct port100_frame *frame = _frame;
 575
 576        if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) ||
 577            frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT))
 578                return false;
 579
 580        checksum = port100_checksum(le16_to_cpu(frame->datalen));
 581        if (checksum != frame->datalen_checksum)
 582                return false;
 583
 584        checksum = port100_data_checksum(frame->data,
 585                                         le16_to_cpu(frame->datalen));
 586        if (checksum != PORT100_FRAME_CHECKSUM(frame))
 587                return false;
 588
 589        return true;
 590}
 591
 592static bool port100_rx_frame_is_ack(struct port100_ack_frame *frame)
 593{
 594        return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) &&
 595                frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK));
 596}
 597
 598static inline int port100_rx_frame_size(void *frame)
 599{
 600        struct port100_frame *f = frame;
 601
 602        return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) +
 603               PORT100_FRAME_TAIL_LEN;
 604}
 605
 606static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame)
 607{
 608        struct port100_frame *f = frame;
 609
 610        return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code));
 611}
 612
 613static void port100_recv_response(struct urb *urb)
 614{
 615        struct port100 *dev = urb->context;
 616        struct port100_cmd *cmd = dev->cmd;
 617        u8 *in_frame;
 618
 619        cmd->status = urb->status;
 620
 621        switch (urb->status) {
 622        case 0:
 623                break; /* success */
 624        case -ECONNRESET:
 625        case -ENOENT:
 626                nfc_err(&dev->interface->dev,
 627                        "The urb has been canceled (status %d)\n", urb->status);
 628                goto sched_wq;
 629        case -ESHUTDOWN:
 630        default:
 631                nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
 632                        urb->status);
 633                goto sched_wq;
 634        }
 635
 636        in_frame = dev->in_urb->transfer_buffer;
 637
 638        if (!port100_rx_frame_is_valid(in_frame)) {
 639                nfc_err(&dev->interface->dev, "Received an invalid frame\n");
 640                cmd->status = -EIO;
 641                goto sched_wq;
 642        }
 643
 644        print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
 645                             port100_rx_frame_size(in_frame), false);
 646
 647        if (!port100_rx_frame_is_cmd_response(dev, in_frame)) {
 648                nfc_err(&dev->interface->dev,
 649                        "It's not the response to the last command\n");
 650                cmd->status = -EIO;
 651                goto sched_wq;
 652        }
 653
 654sched_wq:
 655        schedule_work(&dev->cmd_complete_work);
 656}
 657
 658static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags)
 659{
 660        dev->in_urb->complete = port100_recv_response;
 661
 662        return usb_submit_urb(dev->in_urb, flags);
 663}
 664
 665static void port100_recv_ack(struct urb *urb)
 666{
 667        struct port100 *dev = urb->context;
 668        struct port100_cmd *cmd = dev->cmd;
 669        struct port100_ack_frame *in_frame;
 670        int rc;
 671
 672        cmd->status = urb->status;
 673
 674        switch (urb->status) {
 675        case 0:
 676                break; /* success */
 677        case -ECONNRESET:
 678        case -ENOENT:
 679                nfc_err(&dev->interface->dev,
 680                        "The urb has been stopped (status %d)\n", urb->status);
 681                goto sched_wq;
 682        case -ESHUTDOWN:
 683        default:
 684                nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
 685                        urb->status);
 686                goto sched_wq;
 687        }
 688
 689        in_frame = dev->in_urb->transfer_buffer;
 690
 691        if (!port100_rx_frame_is_ack(in_frame)) {
 692                nfc_err(&dev->interface->dev, "Received an invalid ack\n");
 693                cmd->status = -EIO;
 694                goto sched_wq;
 695        }
 696
 697        rc = port100_submit_urb_for_response(dev, GFP_ATOMIC);
 698        if (rc) {
 699                nfc_err(&dev->interface->dev,
 700                        "usb_submit_urb failed with result %d\n", rc);
 701                cmd->status = rc;
 702                goto sched_wq;
 703        }
 704
 705        return;
 706
 707sched_wq:
 708        schedule_work(&dev->cmd_complete_work);
 709}
 710
 711static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags)
 712{
 713        dev->in_urb->complete = port100_recv_ack;
 714
 715        return usb_submit_urb(dev->in_urb, flags);
 716}
 717
 718static int port100_send_ack(struct port100 *dev)
 719{
 720        int rc = 0;
 721
 722        mutex_lock(&dev->out_urb_lock);
 723
 724        /*
 725         * If prior cancel is in-flight (dev->cmd_cancel == true), we
 726         * can skip to send cancel. Then this will wait the prior
 727         * cancel, or merged into the next cancel rarely if next
 728         * cancel was started before waiting done. In any case, this
 729         * will be waked up soon or later.
 730         */
 731        if (!dev->cmd_cancel) {
 732                reinit_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                /*
 741                 * Set the cmd_cancel flag only if the URB has been
 742                 * successfully submitted. It will be reset by the out
 743                 * URB completion callback port100_send_complete().
 744                 */
 745                dev->cmd_cancel = !rc;
 746        }
 747
 748        mutex_unlock(&dev->out_urb_lock);
 749
 750        if (!rc)
 751                wait_for_completion(&dev->cmd_cancel_done);
 752
 753        return rc;
 754}
 755
 756static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
 757                                    struct sk_buff *in, int in_len)
 758{
 759        int rc;
 760
 761        mutex_lock(&dev->out_urb_lock);
 762
 763        /* A command cancel frame as been sent through dev->out_urb. Don't try
 764         * to submit a new one.
 765         */
 766        if (dev->cmd_cancel) {
 767                rc = -EAGAIN;
 768                goto exit;
 769        }
 770
 771        dev->out_urb->transfer_buffer = out->data;
 772        dev->out_urb->transfer_buffer_length = out->len;
 773
 774        dev->in_urb->transfer_buffer = in->data;
 775        dev->in_urb->transfer_buffer_length = in_len;
 776
 777        print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1,
 778                             out->data, out->len, false);
 779
 780        rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
 781        if (rc)
 782                goto exit;
 783
 784        rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
 785        if (rc)
 786                usb_kill_urb(dev->out_urb);
 787
 788exit:
 789        mutex_unlock(&dev->out_urb_lock);
 790
 791        return rc;
 792}
 793
 794static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
 795                                    struct sk_buff *skb)
 796{
 797        /* payload is already there, just update datalen */
 798        int payload_len = skb->len;
 799
 800        skb_push(skb, PORT100_FRAME_HEADER_LEN);
 801        skb_put(skb, PORT100_FRAME_TAIL_LEN);
 802
 803        port100_tx_frame_init(skb->data, cmd_code);
 804        port100_tx_update_payload_len(skb->data, payload_len);
 805        port100_tx_frame_finish(skb->data);
 806}
 807
 808static void port100_send_async_complete(struct port100 *dev)
 809{
 810        struct port100_cmd *cmd = dev->cmd;
 811        int status = cmd->status;
 812
 813        struct sk_buff *req = cmd->req;
 814        struct sk_buff *resp = cmd->resp;
 815
 816        dev_kfree_skb(req);
 817
 818        dev->cmd = NULL;
 819
 820        if (status < 0) {
 821                cmd->complete_cb(dev, cmd->complete_cb_context,
 822                                 ERR_PTR(status));
 823                dev_kfree_skb(resp);
 824                goto done;
 825        }
 826
 827        skb_put(resp, port100_rx_frame_size(resp->data));
 828        skb_pull(resp, PORT100_FRAME_HEADER_LEN);
 829        skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN);
 830
 831        cmd->complete_cb(dev, cmd->complete_cb_context, resp);
 832
 833done:
 834        kfree(cmd);
 835}
 836
 837static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
 838                                struct sk_buff *req,
 839                                port100_send_async_complete_t complete_cb,
 840                                void *complete_cb_context)
 841{
 842        struct port100_cmd *cmd;
 843        struct sk_buff *resp;
 844        int rc;
 845        int  resp_len = PORT100_FRAME_HEADER_LEN +
 846                        PORT100_FRAME_MAX_PAYLOAD_LEN +
 847                        PORT100_FRAME_TAIL_LEN;
 848
 849        if (dev->cmd) {
 850                nfc_err(&dev->interface->dev,
 851                        "A command is still in process\n");
 852                return -EBUSY;
 853        }
 854
 855        resp = alloc_skb(resp_len, GFP_KERNEL);
 856        if (!resp)
 857                return -ENOMEM;
 858
 859        cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 860        if (!cmd) {
 861                dev_kfree_skb(resp);
 862                return -ENOMEM;
 863        }
 864
 865        cmd->code = cmd_code;
 866        cmd->req = req;
 867        cmd->resp = resp;
 868        cmd->resp_len = resp_len;
 869        cmd->complete_cb = complete_cb;
 870        cmd->complete_cb_context = complete_cb_context;
 871
 872        port100_build_cmd_frame(dev, cmd_code, req);
 873
 874        dev->cmd = cmd;
 875
 876        rc = port100_send_frame_async(dev, req, resp, resp_len);
 877        if (rc) {
 878                kfree(cmd);
 879                dev_kfree_skb(resp);
 880                dev->cmd = NULL;
 881        }
 882
 883        return rc;
 884}
 885
 886struct port100_sync_cmd_response {
 887        struct sk_buff *resp;
 888        struct completion done;
 889};
 890
 891static void port100_wq_cmd_complete(struct work_struct *work)
 892{
 893        struct port100 *dev = container_of(work, struct port100,
 894                                           cmd_complete_work);
 895
 896        port100_send_async_complete(dev);
 897}
 898
 899static void port100_send_sync_complete(struct port100 *dev, void *_arg,
 900                                      struct sk_buff *resp)
 901{
 902        struct port100_sync_cmd_response *arg = _arg;
 903
 904        arg->resp = resp;
 905        complete(&arg->done);
 906}
 907
 908static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code,
 909                                             struct sk_buff *req)
 910{
 911        int rc;
 912        struct port100_sync_cmd_response arg;
 913
 914        init_completion(&arg.done);
 915
 916        rc = port100_send_cmd_async(dev, cmd_code, req,
 917                                    port100_send_sync_complete, &arg);
 918        if (rc) {
 919                dev_kfree_skb(req);
 920                return ERR_PTR(rc);
 921        }
 922
 923        wait_for_completion(&arg.done);
 924
 925        return arg.resp;
 926}
 927
 928static void port100_send_complete(struct urb *urb)
 929{
 930        struct port100 *dev = urb->context;
 931
 932        if (dev->cmd_cancel) {
 933                complete_all(&dev->cmd_cancel_done);
 934                dev->cmd_cancel = false;
 935        }
 936
 937        switch (urb->status) {
 938        case 0:
 939                break; /* success */
 940        case -ECONNRESET:
 941        case -ENOENT:
 942                nfc_err(&dev->interface->dev,
 943                        "The urb has been stopped (status %d)\n", urb->status);
 944                break;
 945        case -ESHUTDOWN:
 946        default:
 947                nfc_err(&dev->interface->dev, "Urb failure (status %d)\n",
 948                        urb->status);
 949        }
 950}
 951
 952static void port100_abort_cmd(struct nfc_digital_dev *ddev)
 953{
 954        struct port100 *dev = nfc_digital_get_drvdata(ddev);
 955
 956        /* An ack will cancel the last issued command */
 957        port100_send_ack(dev);
 958
 959        /* cancel the urb request */
 960        usb_kill_urb(dev->in_urb);
 961}
 962
 963static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size)
 964{
 965        struct sk_buff *skb;
 966
 967        skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size,
 968                        GFP_KERNEL);
 969        if (skb)
 970                skb_reserve(skb, dev->skb_headroom);
 971
 972        return skb;
 973}
 974
 975static int port100_set_command_type(struct port100 *dev, u8 command_type)
 976{
 977        struct sk_buff *skb;
 978        struct sk_buff *resp;
 979        int rc;
 980
 981        skb = port100_alloc_skb(dev, 1);
 982        if (!skb)
 983                return -ENOMEM;
 984
 985        skb_put_u8(skb, command_type);
 986
 987        resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb);
 988        if (IS_ERR(resp))
 989                return PTR_ERR(resp);
 990
 991        rc = resp->data[0];
 992
 993        dev_kfree_skb(resp);
 994
 995        return rc;
 996}
 997
 998static u64 port100_get_command_type_mask(struct port100 *dev)
 999{
1000        struct sk_buff *skb;
1001        struct sk_buff *resp;
1002        u64 mask;
1003
1004        skb = port100_alloc_skb(dev, 0);
1005        if (!skb)
1006                return -ENOMEM;
1007
1008        resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
1009        if (IS_ERR(resp))
1010                return PTR_ERR(resp);
1011
1012        if (resp->len < 8)
1013                mask = 0;
1014        else
1015                mask = be64_to_cpu(*(__be64 *)resp->data);
1016
1017        dev_kfree_skb(resp);
1018
1019        return mask;
1020}
1021
1022static u16 port100_get_firmware_version(struct port100 *dev)
1023{
1024        struct sk_buff *skb;
1025        struct sk_buff *resp;
1026        u16 fw_ver;
1027
1028        skb = port100_alloc_skb(dev, 0);
1029        if (!skb)
1030                return 0;
1031
1032        resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION,
1033                                     skb);
1034        if (IS_ERR(resp))
1035                return 0;
1036
1037        fw_ver = le16_to_cpu(*(__le16 *)resp->data);
1038
1039        dev_kfree_skb(resp);
1040
1041        return fw_ver;
1042}
1043
1044static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
1045{
1046        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1047        struct sk_buff *skb, *resp;
1048
1049        skb = port100_alloc_skb(dev, 1);
1050        if (!skb)
1051                return -ENOMEM;
1052
1053        skb_put_u8(skb, on ? 1 : 0);
1054
1055        /* Cancel the last command if the device is being switched off */
1056        if (!on)
1057                port100_abort_cmd(ddev);
1058
1059        resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
1060
1061        if (IS_ERR(resp))
1062                return PTR_ERR(resp);
1063
1064        dev_kfree_skb(resp);
1065
1066        return 0;
1067}
1068
1069static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1070{
1071        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1072        struct sk_buff *skb;
1073        struct sk_buff *resp;
1074        int rc;
1075
1076        if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1077                return -EINVAL;
1078
1079        skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
1080        if (!skb)
1081                return -ENOMEM;
1082
1083        skb_put_data(skb, &in_rf_settings[rf],
1084                     sizeof(struct port100_in_rf_setting));
1085
1086        resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
1087
1088        if (IS_ERR(resp))
1089                return PTR_ERR(resp);
1090
1091        rc = resp->data[0];
1092
1093        dev_kfree_skb(resp);
1094
1095        return rc;
1096}
1097
1098static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
1099{
1100        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1101        struct port100_protocol *protocols;
1102        struct sk_buff *skb;
1103        struct sk_buff *resp;
1104        int num_protocols;
1105        size_t size;
1106        int rc;
1107
1108        if (param >= NFC_DIGITAL_FRAMING_LAST)
1109                return -EINVAL;
1110
1111        protocols = in_protocols[param];
1112
1113        num_protocols = 0;
1114        while (protocols[num_protocols].number != PORT100_IN_PROT_END)
1115                num_protocols++;
1116
1117        if (!num_protocols)
1118                return 0;
1119
1120        size = sizeof(struct port100_protocol) * num_protocols;
1121
1122        skb = port100_alloc_skb(dev, size);
1123        if (!skb)
1124                return -ENOMEM;
1125
1126        skb_put_data(skb, protocols, size);
1127
1128        resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
1129
1130        if (IS_ERR(resp))
1131                return PTR_ERR(resp);
1132
1133        rc = resp->data[0];
1134
1135        dev_kfree_skb(resp);
1136
1137        return rc;
1138}
1139
1140static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
1141                                   int param)
1142{
1143        if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1144                return port100_in_set_rf(ddev, param);
1145
1146        if (type == NFC_DIGITAL_CONFIG_FRAMING)
1147                return port100_in_set_framing(ddev, param);
1148
1149        return -EINVAL;
1150}
1151
1152static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
1153                                       struct sk_buff *resp)
1154{
1155        struct port100_cb_arg *cb_arg = arg;
1156        nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1157        u32 status;
1158        int rc;
1159
1160        if (IS_ERR(resp)) {
1161                rc =  PTR_ERR(resp);
1162                goto exit;
1163        }
1164
1165        if (resp->len < 4) {
1166                nfc_err(&dev->interface->dev,
1167                        "Invalid packet length received\n");
1168                rc = -EIO;
1169                goto error;
1170        }
1171
1172        status = le32_to_cpu(*(__le32 *)resp->data);
1173
1174        skb_pull(resp, sizeof(u32));
1175
1176        if (status == PORT100_CMD_STATUS_TIMEOUT) {
1177                rc = -ETIMEDOUT;
1178                goto error;
1179        }
1180
1181        if (status != PORT100_CMD_STATUS_OK) {
1182                nfc_err(&dev->interface->dev,
1183                        "in_comm_rf failed with status 0x%08x\n", status);
1184                rc = -EIO;
1185                goto error;
1186        }
1187
1188        /* Remove collision bits byte */
1189        skb_pull(resp, 1);
1190
1191        goto exit;
1192
1193error:
1194        kfree_skb(resp);
1195        resp = ERR_PTR(rc);
1196
1197exit:
1198        cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1199
1200        kfree(cb_arg);
1201}
1202
1203static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
1204                               struct sk_buff *skb, u16 _timeout,
1205                               nfc_digital_cmd_complete_t cb, void *arg)
1206{
1207        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1208        struct port100_cb_arg *cb_arg;
1209        __le16 timeout;
1210
1211        cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1212        if (!cb_arg)
1213                return -ENOMEM;
1214
1215        cb_arg->complete_cb = cb;
1216        cb_arg->complete_arg = arg;
1217
1218        timeout = cpu_to_le16(_timeout * 10);
1219
1220        memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
1221
1222        return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
1223                                      port100_in_comm_rf_complete, cb_arg);
1224}
1225
1226static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1227{
1228        struct port100 *dev = nfc_digital_get_drvdata(ddev);
1229        struct sk_buff *skb;
1230        struct sk_buff *resp;
1231        int rc;
1232
1233        if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1234                return -EINVAL;
1235
1236        skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting));
1237        if (!skb)
1238                return -ENOMEM;
1239
1240        skb_put_data(skb, &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        skb_put_data(skb, 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, RCS380S_PRODUCT_ID), },
1481        { USB_DEVICE(SONY_VENDOR_ID, RCS380P_PRODUCT_ID), },
1482        { }
1483};
1484MODULE_DEVICE_TABLE(usb, port100_table);
1485
1486static int port100_probe(struct usb_interface *interface,
1487                         const struct usb_device_id *id)
1488{
1489        struct port100 *dev;
1490        int rc;
1491        struct usb_host_interface *iface_desc;
1492        struct usb_endpoint_descriptor *endpoint;
1493        int in_endpoint;
1494        int out_endpoint;
1495        u16 fw_version;
1496        u64 cmd_type_mask;
1497        int i;
1498
1499        dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL);
1500        if (!dev)
1501                return -ENOMEM;
1502
1503        mutex_init(&dev->out_urb_lock);
1504        dev->udev = usb_get_dev(interface_to_usbdev(interface));
1505        dev->interface = interface;
1506        usb_set_intfdata(interface, dev);
1507
1508        in_endpoint = out_endpoint = 0;
1509        iface_desc = interface->cur_altsetting;
1510        for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1511                endpoint = &iface_desc->endpoint[i].desc;
1512
1513                if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
1514                        in_endpoint = endpoint->bEndpointAddress;
1515
1516                if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
1517                        out_endpoint = endpoint->bEndpointAddress;
1518        }
1519
1520        if (!in_endpoint || !out_endpoint) {
1521                nfc_err(&interface->dev,
1522                        "Could not find bulk-in or bulk-out endpoint\n");
1523                rc = -ENODEV;
1524                goto error;
1525        }
1526
1527        dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1528        dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1529
1530        if (!dev->in_urb || !dev->out_urb) {
1531                nfc_err(&interface->dev, "Could not allocate USB URBs\n");
1532                rc = -ENOMEM;
1533                goto error;
1534        }
1535
1536        usb_fill_bulk_urb(dev->in_urb, dev->udev,
1537                          usb_rcvbulkpipe(dev->udev, in_endpoint),
1538                          NULL, 0, NULL, dev);
1539        usb_fill_bulk_urb(dev->out_urb, dev->udev,
1540                          usb_sndbulkpipe(dev->udev, out_endpoint),
1541                          NULL, 0, port100_send_complete, dev);
1542        dev->out_urb->transfer_flags = URB_ZERO_PACKET;
1543
1544        dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
1545                            PORT100_COMM_RF_HEAD_MAX_LEN;
1546        dev->skb_tailroom = PORT100_FRAME_TAIL_LEN;
1547
1548        init_completion(&dev->cmd_cancel_done);
1549        INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete);
1550
1551        /* The first thing to do with the Port-100 is to set the command type
1552         * to be used. If supported we use command type 1. 0 otherwise.
1553         */
1554        cmd_type_mask = port100_get_command_type_mask(dev);
1555        if (!cmd_type_mask) {
1556                nfc_err(&interface->dev,
1557                        "Could not get supported command types\n");
1558                rc = -ENODEV;
1559                goto error;
1560        }
1561
1562        if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1))
1563                dev->cmd_type = PORT100_CMD_TYPE_1;
1564        else
1565                dev->cmd_type = PORT100_CMD_TYPE_0;
1566
1567        rc = port100_set_command_type(dev, dev->cmd_type);
1568        if (rc) {
1569                nfc_err(&interface->dev,
1570                        "The device does not support command type %u\n",
1571                        dev->cmd_type);
1572                goto error;
1573        }
1574
1575        fw_version = port100_get_firmware_version(dev);
1576        if (!fw_version)
1577                nfc_err(&interface->dev,
1578                        "Could not get device firmware version\n");
1579
1580        nfc_info(&interface->dev,
1581                 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n",
1582                 (fw_version & 0xFF00) >> 8, fw_version & 0xFF);
1583
1584        dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops,
1585                                                           PORT100_PROTOCOLS,
1586                                                           PORT100_CAPABILITIES,
1587                                                           dev->skb_headroom,
1588                                                           dev->skb_tailroom);
1589        if (!dev->nfc_digital_dev) {
1590                nfc_err(&interface->dev,
1591                        "Could not allocate nfc_digital_dev\n");
1592                rc = -ENOMEM;
1593                goto error;
1594        }
1595
1596        nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev);
1597        nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
1598
1599        rc = nfc_digital_register_device(dev->nfc_digital_dev);
1600        if (rc) {
1601                nfc_err(&interface->dev,
1602                        "Could not register digital device\n");
1603                goto free_nfc_dev;
1604        }
1605
1606        return 0;
1607
1608free_nfc_dev:
1609        nfc_digital_free_device(dev->nfc_digital_dev);
1610
1611error:
1612        usb_free_urb(dev->in_urb);
1613        usb_free_urb(dev->out_urb);
1614        usb_put_dev(dev->udev);
1615
1616        return rc;
1617}
1618
1619static void port100_disconnect(struct usb_interface *interface)
1620{
1621        struct port100 *dev;
1622
1623        dev = usb_get_intfdata(interface);
1624        usb_set_intfdata(interface, NULL);
1625
1626        nfc_digital_unregister_device(dev->nfc_digital_dev);
1627        nfc_digital_free_device(dev->nfc_digital_dev);
1628
1629        usb_kill_urb(dev->in_urb);
1630        usb_kill_urb(dev->out_urb);
1631
1632        usb_free_urb(dev->in_urb);
1633        usb_free_urb(dev->out_urb);
1634        usb_put_dev(dev->udev);
1635
1636        kfree(dev->cmd);
1637
1638        nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected\n");
1639}
1640
1641static struct usb_driver port100_driver = {
1642        .name =         "port100",
1643        .probe =        port100_probe,
1644        .disconnect =   port100_disconnect,
1645        .id_table =     port100_table,
1646};
1647
1648module_usb_driver(port100_driver);
1649
1650MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
1651MODULE_VERSION(VERSION);
1652MODULE_LICENSE("GPL");
1653