drivers/nfc/port100.c

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