drivers/nfc/port100.c

   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) */
  44 static 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
  92 struct port100;
  93
  94 typedef 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  */
 106 struct 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
 118 static 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  * 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  */
 158 struct 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
 167 static 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
 215 struct port100_protocol {
 216         u8 number;
 217         u8 value;
 218 } __packed;
 219
 220 static struct port100_protocol
 221 in_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
 394 static struct port100_protocol
 395 tg_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
 439 struct 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
 470 struct 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
 480 struct 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
 489 struct port100_ack_frame {
 490         u8 preamble;
 491         __be16 start_frame;
 492         __be16 ack_frame;
 493         u8 postambule;
 494 } __packed;
 495
 496 struct port100_cb_arg {
 497         nfc_digital_cmd_complete_t complete_cb;
 498         void *complete_arg;
 499         u8 mdaa;
 500 };
 501
 502 struct 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
 514 struct 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 */
 523 static 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 */
 529 static 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
 540 static 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
 552 static 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
 564 static 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
 571 static 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
 592 static 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
 598 static 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
 606 static 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
 613 static 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
 654 sched_wq:
 655         schedule_work(&dev->cmd_complete_work);
 656 }
 657
 658 static 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
 665 static 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
 707 sched_wq:
 708         schedule_work(&dev->cmd_complete_work);
 709 }
 710
 711 static 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
 718 static 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
 756 static 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
 788 exit:
 789         mutex_unlock(&dev->out_urb_lock);
 790
 791         return rc;
 792 }
 793
 794 static 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
 808 static 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
 833 done:
 834         kfree(cmd);
 835 }
 836
 837 static 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
 886 struct port100_sync_cmd_response {
 887         struct sk_buff *resp;
 888         struct completion done;
 889 };
 890
 891 static 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
 899 static 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
 908 static 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
 928 static 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
 952 static 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
 963 static 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
 975 static 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
 998 static 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
1022 static 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
1044 static 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
1069 static 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
1098 static 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
1140 static 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
1152 static 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
1193 error:
1194         kfree_skb(resp);
1195         resp = ERR_PTR(rc);
1196
1197 exit:
1198         cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1199
1200         kfree(cb_arg);
1201 }
1202
1203 static 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
1226 static 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
1255 static 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
1297 static 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
1309 static 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
1329 static 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
1363 exit:
1364         cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1365
1366         kfree(cb_arg);
1367 }
1368
1369 static 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
1397 static 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
1453 static 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
1466 static 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
1479 static 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 };
1484 MODULE_DEVICE_TABLE(usb, port100_table);
1485
1486 static 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
1608 free_nfc_dev:
1609         nfc_digital_free_device(dev->nfc_digital_dev);
1610
1611 error:
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
1619 static 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
1641 static struct usb_driver port100_driver = {
1642         .name =         "port100",
1643         .probe =        port100_probe,
1644         .disconnect =   port100_disconnect,
1645         .id_table =     port100_table,
1646 };
1647
1648 module_usb_driver(port100_driver);
1649
1650 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
1651 MODULE_VERSION(VERSION);
1652 MODULE_LICENSE("GPL");