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_END, 0 },
 347         },
 348         [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
 349                 { PORT100_IN_PROT_END, 0 },
 350         },
 351         [NFC_DIGITAL_FRAMING_NFCB] = {
 352                 { PORT100_IN_PROT_INITIAL_GUARD_TIME,     20 },
 353                 { PORT100_IN_PROT_ADD_CRC,                 1 },
 354                 { PORT100_IN_PROT_CHECK_CRC,               1 },
 355                 { PORT100_IN_PROT_MULTI_CARD,              0 },
 356                 { PORT100_IN_PROT_ADD_PARITY,              0 },
 357                 { PORT100_IN_PROT_CHECK_PARITY,            0 },
 358                 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE,    0 },
 359                 { PORT100_IN_PROT_VALID_BIT_NUMBER,        8 },
 360                 { PORT100_IN_PROT_CRYPTO1,                 0 },
 361                 { PORT100_IN_PROT_ADD_SOF,                 1 },
 362                 { PORT100_IN_PROT_CHECK_SOF,               1 },
 363                 { PORT100_IN_PROT_ADD_EOF,                 1 },
 364                 { PORT100_IN_PROT_CHECK_EOF,               1 },
 365                 { PORT100_IN_PROT_DEAF_TIME,               4 },
 366                 { PORT100_IN_PROT_CRM,                     0 },
 367                 { PORT100_IN_PROT_CRM_MIN_LEN,             0 },
 368                 { PORT100_IN_PROT_T1_TAG_FRAME,            0 },
 369                 { PORT100_IN_PROT_RFCA,                    0 },
 370                 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 },
 371                 { PORT100_IN_PROT_END,                     0 },
 372         },
 373         [NFC_DIGITAL_FRAMING_NFCB_T4T] = {
 374                 /* nfc_digital_framing_nfcb */
 375                 { PORT100_IN_PROT_END,                     0 },
 376         },
 377         /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
 378         [NFC_DIGITAL_FRAMING_LAST] = {
 379                 { PORT100_IN_PROT_END, 0 },
 380         },
 381 };
 382
 383 static struct port100_protocol
 384 tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = {
 385         [NFC_DIGITAL_FRAMING_NFCA_SHORT] = {
 386                 { PORT100_TG_PROT_END, 0 },
 387         },
 388         [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = {
 389                 { PORT100_TG_PROT_END, 0 },
 390         },
 391         [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = {
 392                 { PORT100_TG_PROT_END, 0 },
 393         },
 394         [NFC_DIGITAL_FRAMING_NFCA_T1T] = {
 395                 { PORT100_TG_PROT_END, 0 },
 396         },
 397         [NFC_DIGITAL_FRAMING_NFCA_T2T] = {
 398                 { PORT100_TG_PROT_END, 0 },
 399         },
 400         [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = {
 401                 { PORT100_TG_PROT_TU,     1 },
 402                 { PORT100_TG_PROT_RF_OFF, 0 },
 403                 { PORT100_TG_PROT_CRM,    7 },
 404                 { PORT100_TG_PROT_END,    0 },
 405         },
 406         [NFC_DIGITAL_FRAMING_NFCF] = {
 407                 { PORT100_TG_PROT_END, 0 },
 408         },
 409         [NFC_DIGITAL_FRAMING_NFCF_T3T] = {
 410                 { PORT100_TG_PROT_END, 0 },
 411         },
 412         [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = {
 413                 { PORT100_TG_PROT_TU,     1 },
 414                 { PORT100_TG_PROT_RF_OFF, 0 },
 415                 { PORT100_TG_PROT_CRM,    7 },
 416                 { PORT100_TG_PROT_END,    0 },
 417         },
 418         [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = {
 419                 { PORT100_TG_PROT_RF_OFF, 1 },
 420                 { PORT100_TG_PROT_END,    0 },
 421         },
 422         /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */
 423         [NFC_DIGITAL_FRAMING_LAST] = {
 424                 { PORT100_TG_PROT_END,    0 },
 425         },
 426 };
 427
 428 struct port100 {
 429         struct nfc_digital_dev *nfc_digital_dev;
 430
 431         int skb_headroom;
 432         int skb_tailroom;
 433
 434         struct usb_device *udev;
 435         struct usb_interface *interface;
 436
 437         struct urb *out_urb;
 438         struct urb *in_urb;
 439
 440         struct work_struct cmd_complete_work;
 441
 442         u8 cmd_type;
 443
 444         /* The digital stack serializes commands to be sent. There is no need
 445          * for any queuing/locking mechanism at driver level.
 446          */
 447         struct port100_cmd *cmd;
 448 };
 449
 450 struct port100_cmd {
 451         u8 code;
 452         int status;
 453         struct sk_buff *req;
 454         struct sk_buff *resp;
 455         int resp_len;
 456         port100_send_async_complete_t  complete_cb;
 457         void *complete_cb_context;
 458 };
 459
 460 struct port100_frame {
 461         u8 preamble;
 462         __be16 start_frame;
 463         __be16 extended_frame;
 464         __le16 datalen;
 465         u8 datalen_checksum;
 466         u8 data[];
 467 } __packed;
 468
 469 struct port100_ack_frame {
 470         u8 preamble;
 471         __be16 start_frame;
 472         __be16 ack_frame;
 473         u8 postambule;
 474 } __packed;
 475
 476 struct port100_cb_arg {
 477         nfc_digital_cmd_complete_t complete_cb;
 478         void *complete_arg;
 479         u8 mdaa;
 480 };
 481
 482 struct port100_tg_comm_rf_cmd {
 483         __le16 guard_time;
 484         __le16 send_timeout;
 485         u8 mdaa;
 486         u8 nfca_param[6];
 487         u8 nfcf_param[18];
 488         u8 mf_halted;
 489         u8 arae_flag;
 490         __le16 recv_timeout;
 491         u8 data[];
 492 } __packed;
 493
 494 struct port100_tg_comm_rf_res {
 495         u8 comm_type;
 496         u8 ar_status;
 497         u8 target_activated;
 498         __le32 status;
 499         u8 data[];
 500 } __packed;
 501
 502 /* The rule: value + checksum = 0 */
 503 static inline u8 port100_checksum(u16 value)
 504 {
 505         return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1;
 506 }
 507
 508 /* The rule: sum(data elements) + checksum = 0 */
 509 static u8 port100_data_checksum(u8 *data, int datalen)
 510 {
 511         u8 sum = 0;
 512         int i;
 513
 514         for (i = 0; i < datalen; i++)
 515                 sum += data[i];
 516
 517         return port100_checksum(sum);
 518 }
 519
 520 static void port100_tx_frame_init(void *_frame, u8 cmd_code)
 521 {
 522         struct port100_frame *frame = _frame;
 523
 524         frame->preamble = 0;
 525         frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF);
 526         frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT);
 527         PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT;
 528         PORT100_FRAME_CMD(frame) = cmd_code;
 529         frame->datalen = cpu_to_le16(2);
 530 }
 531
 532 static void port100_tx_frame_finish(void *_frame)
 533 {
 534         struct port100_frame *frame = _frame;
 535
 536         frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen));
 537
 538         PORT100_FRAME_CHECKSUM(frame) =
 539                 port100_data_checksum(frame->data, le16_to_cpu(frame->datalen));
 540
 541         PORT100_FRAME_POSTAMBLE(frame) = 0;
 542 }
 543
 544 static void port100_tx_update_payload_len(void *_frame, int len)
 545 {
 546         struct port100_frame *frame = _frame;
 547
 548         frame->datalen = cpu_to_le16(le16_to_cpu(frame->datalen) + len);
 549 }
 550
 551 static bool port100_rx_frame_is_valid(void *_frame)
 552 {
 553         u8 checksum;
 554         struct port100_frame *frame = _frame;
 555
 556         if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) ||
 557             frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT))
 558                 return false;
 559
 560         checksum = port100_checksum(le16_to_cpu(frame->datalen));
 561         if (checksum != frame->datalen_checksum)
 562                 return false;
 563
 564         checksum = port100_data_checksum(frame->data,
 565                                          le16_to_cpu(frame->datalen));
 566         if (checksum != PORT100_FRAME_CHECKSUM(frame))
 567                 return false;
 568
 569         return true;
 570 }
 571
 572 static bool port100_rx_frame_is_ack(struct port100_ack_frame *frame)
 573 {
 574         return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) &&
 575                 frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK));
 576 }
 577
 578 static inline int port100_rx_frame_size(void *frame)
 579 {
 580         struct port100_frame *f = frame;
 581
 582         return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) +
 583                PORT100_FRAME_TAIL_LEN;
 584 }
 585
 586 static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame)
 587 {
 588         struct port100_frame *f = frame;
 589
 590         return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code));
 591 }
 592
 593 static void port100_recv_response(struct urb *urb)
 594 {
 595         struct port100 *dev = urb->context;
 596         struct port100_cmd *cmd = dev->cmd;
 597         u8 *in_frame;
 598
 599         cmd->status = urb->status;
 600
 601         switch (urb->status) {
 602         case 0:
 603                 break; /* success */
 604         case -ECONNRESET:
 605         case -ENOENT:
 606                 nfc_err(&dev->interface->dev,
 607                         "The urb has been canceled (status %d)", urb->status);
 608                 goto sched_wq;
 609         case -ESHUTDOWN:
 610         default:
 611                 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
 612                         urb->status);
 613                 goto sched_wq;
 614         }
 615
 616         in_frame = dev->in_urb->transfer_buffer;
 617
 618         if (!port100_rx_frame_is_valid(in_frame)) {
 619                 nfc_err(&dev->interface->dev, "Received an invalid frame");
 620                 cmd->status = -EIO;
 621                 goto sched_wq;
 622         }
 623
 624         print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame,
 625                              port100_rx_frame_size(in_frame), false);
 626
 627         if (!port100_rx_frame_is_cmd_response(dev, in_frame)) {
 628                 nfc_err(&dev->interface->dev,
 629                         "It's not the response to the last command");
 630                 cmd->status = -EIO;
 631                 goto sched_wq;
 632         }
 633
 634 sched_wq:
 635         schedule_work(&dev->cmd_complete_work);
 636 }
 637
 638 static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags)
 639 {
 640         dev->in_urb->complete = port100_recv_response;
 641
 642         return usb_submit_urb(dev->in_urb, flags);
 643 }
 644
 645 static void port100_recv_ack(struct urb *urb)
 646 {
 647         struct port100 *dev = urb->context;
 648         struct port100_cmd *cmd = dev->cmd;
 649         struct port100_ack_frame *in_frame;
 650         int rc;
 651
 652         cmd->status = urb->status;
 653
 654         switch (urb->status) {
 655         case 0:
 656                 break; /* success */
 657         case -ECONNRESET:
 658         case -ENOENT:
 659                 nfc_err(&dev->interface->dev,
 660                         "The urb has been stopped (status %d)", urb->status);
 661                 goto sched_wq;
 662         case -ESHUTDOWN:
 663         default:
 664                 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
 665                         urb->status);
 666                 goto sched_wq;
 667         }
 668
 669         in_frame = dev->in_urb->transfer_buffer;
 670
 671         if (!port100_rx_frame_is_ack(in_frame)) {
 672                 nfc_err(&dev->interface->dev, "Received an invalid ack");
 673                 cmd->status = -EIO;
 674                 goto sched_wq;
 675         }
 676
 677         rc = port100_submit_urb_for_response(dev, GFP_ATOMIC);
 678         if (rc) {
 679                 nfc_err(&dev->interface->dev,
 680                         "usb_submit_urb failed with result %d", rc);
 681                 cmd->status = rc;
 682                 goto sched_wq;
 683         }
 684
 685         return;
 686
 687 sched_wq:
 688         schedule_work(&dev->cmd_complete_work);
 689 }
 690
 691 static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags)
 692 {
 693         dev->in_urb->complete = port100_recv_ack;
 694
 695         return usb_submit_urb(dev->in_urb, flags);
 696 }
 697
 698 static int port100_send_ack(struct port100 *dev)
 699 {
 700         int rc;
 701
 702         dev->out_urb->transfer_buffer = ack_frame;
 703         dev->out_urb->transfer_buffer_length = sizeof(ack_frame);
 704         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
 705
 706         return rc;
 707 }
 708
 709 static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out,
 710                                     struct sk_buff *in, int in_len)
 711 {
 712         int rc;
 713
 714         dev->out_urb->transfer_buffer = out->data;
 715         dev->out_urb->transfer_buffer_length = out->len;
 716
 717         dev->in_urb->transfer_buffer = in->data;
 718         dev->in_urb->transfer_buffer_length = in_len;
 719
 720         print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1,
 721                              out->data, out->len, false);
 722
 723         rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
 724         if (rc)
 725                 return rc;
 726
 727         rc = port100_submit_urb_for_ack(dev, GFP_KERNEL);
 728         if (rc)
 729                 goto error;
 730
 731         return 0;
 732
 733 error:
 734         usb_unlink_urb(dev->out_urb);
 735         return rc;
 736 }
 737
 738 static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code,
 739                                     struct sk_buff *skb)
 740 {
 741         /* payload is already there, just update datalen */
 742         int payload_len = skb->len;
 743
 744         skb_push(skb, PORT100_FRAME_HEADER_LEN);
 745         skb_put(skb, PORT100_FRAME_TAIL_LEN);
 746
 747         port100_tx_frame_init(skb->data, cmd_code);
 748         port100_tx_update_payload_len(skb->data, payload_len);
 749         port100_tx_frame_finish(skb->data);
 750 }
 751
 752 static void port100_send_async_complete(struct port100 *dev)
 753 {
 754         struct port100_cmd *cmd = dev->cmd;
 755         int status = cmd->status;
 756
 757         struct sk_buff *req = cmd->req;
 758         struct sk_buff *resp = cmd->resp;
 759
 760         dev_kfree_skb(req);
 761
 762         dev->cmd = NULL;
 763
 764         if (status < 0) {
 765                 cmd->complete_cb(dev, cmd->complete_cb_context,
 766                                  ERR_PTR(status));
 767                 dev_kfree_skb(resp);
 768                 goto done;
 769         }
 770
 771         skb_put(resp, port100_rx_frame_size(resp->data));
 772         skb_pull(resp, PORT100_FRAME_HEADER_LEN);
 773         skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN);
 774
 775         cmd->complete_cb(dev, cmd->complete_cb_context, resp);
 776
 777 done:
 778         kfree(cmd);
 779 }
 780
 781 static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code,
 782                                 struct sk_buff *req,
 783                                 port100_send_async_complete_t complete_cb,
 784                                 void *complete_cb_context)
 785 {
 786         struct port100_cmd *cmd;
 787         struct sk_buff *resp;
 788         int rc;
 789         int  resp_len = PORT100_FRAME_HEADER_LEN +
 790                         PORT100_FRAME_MAX_PAYLOAD_LEN +
 791                         PORT100_FRAME_TAIL_LEN;
 792
 793         resp = alloc_skb(resp_len, GFP_KERNEL);
 794         if (!resp)
 795                 return -ENOMEM;
 796
 797         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 798         if (!cmd) {
 799                 dev_kfree_skb(resp);
 800                 return -ENOMEM;
 801         }
 802
 803         cmd->code = cmd_code;
 804         cmd->req = req;
 805         cmd->resp = resp;
 806         cmd->resp_len = resp_len;
 807         cmd->complete_cb = complete_cb;
 808         cmd->complete_cb_context = complete_cb_context;
 809
 810         port100_build_cmd_frame(dev, cmd_code, req);
 811
 812         dev->cmd = cmd;
 813
 814         rc = port100_send_frame_async(dev, req, resp, resp_len);
 815         if (rc) {
 816                 kfree(cmd);
 817                 dev_kfree_skb(resp);
 818                 dev->cmd = NULL;
 819         }
 820
 821         return rc;
 822 }
 823
 824 struct port100_sync_cmd_response {
 825         struct sk_buff *resp;
 826         struct completion done;
 827 };
 828
 829 static void port100_wq_cmd_complete(struct work_struct *work)
 830 {
 831         struct port100 *dev = container_of(work, struct port100,
 832                                            cmd_complete_work);
 833
 834         port100_send_async_complete(dev);
 835 }
 836
 837 static void port100_send_sync_complete(struct port100 *dev, void *_arg,
 838                                       struct sk_buff *resp)
 839 {
 840         struct port100_sync_cmd_response *arg = _arg;
 841
 842         arg->resp = resp;
 843         complete(&arg->done);
 844 }
 845
 846 static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code,
 847                                              struct sk_buff *req)
 848 {
 849         int rc;
 850         struct port100_sync_cmd_response arg;
 851
 852         init_completion(&arg.done);
 853
 854         rc = port100_send_cmd_async(dev, cmd_code, req,
 855                                     port100_send_sync_complete, &arg);
 856         if (rc) {
 857                 dev_kfree_skb(req);
 858                 return ERR_PTR(rc);
 859         }
 860
 861         wait_for_completion(&arg.done);
 862
 863         return arg.resp;
 864 }
 865
 866 static void port100_send_complete(struct urb *urb)
 867 {
 868         struct port100 *dev = urb->context;
 869
 870         switch (urb->status) {
 871         case 0:
 872                 break; /* success */
 873         case -ECONNRESET:
 874         case -ENOENT:
 875                 nfc_err(&dev->interface->dev,
 876                         "The urb has been stopped (status %d)", urb->status);
 877                 break;
 878         case -ESHUTDOWN:
 879         default:
 880                 nfc_err(&dev->interface->dev, "Urb failure (status %d)",
 881                         urb->status);
 882         }
 883 }
 884
 885 static void port100_abort_cmd(struct nfc_digital_dev *ddev)
 886 {
 887         struct port100 *dev = nfc_digital_get_drvdata(ddev);
 888
 889         /* An ack will cancel the last issued command */
 890         port100_send_ack(dev);
 891
 892         /* cancel the urb request */
 893         usb_kill_urb(dev->in_urb);
 894 }
 895
 896 static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size)
 897 {
 898         struct sk_buff *skb;
 899
 900         skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size,
 901                         GFP_KERNEL);
 902         if (skb)
 903                 skb_reserve(skb, dev->skb_headroom);
 904
 905         return skb;
 906 }
 907
 908 static int port100_set_command_type(struct port100 *dev, u8 command_type)
 909 {
 910         struct sk_buff *skb;
 911         struct sk_buff *resp;
 912         int rc;
 913
 914         skb = port100_alloc_skb(dev, 1);
 915         if (!skb)
 916                 return -ENOMEM;
 917
 918         *skb_put(skb, sizeof(u8)) = command_type;
 919
 920         resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb);
 921         if (IS_ERR(resp))
 922                 return PTR_ERR(resp);
 923
 924         rc = resp->data[0];
 925
 926         dev_kfree_skb(resp);
 927
 928         return rc;
 929 }
 930
 931 static u64 port100_get_command_type_mask(struct port100 *dev)
 932 {
 933         struct sk_buff *skb;
 934         struct sk_buff *resp;
 935         u64 mask;
 936
 937         skb = port100_alloc_skb(dev, 0);
 938         if (!skb)
 939                 return -ENOMEM;
 940
 941         resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb);
 942         if (IS_ERR(resp))
 943                 return PTR_ERR(resp);
 944
 945         if (resp->len < 8)
 946                 mask = 0;
 947         else
 948                 mask = be64_to_cpu(*(__be64 *)resp->data);
 949
 950         dev_kfree_skb(resp);
 951
 952         return mask;
 953 }
 954
 955 static u16 port100_get_firmware_version(struct port100 *dev)
 956 {
 957         struct sk_buff *skb;
 958         struct sk_buff *resp;
 959         u16 fw_ver;
 960
 961         skb = port100_alloc_skb(dev, 0);
 962         if (!skb)
 963                 return 0;
 964
 965         resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION,
 966                                      skb);
 967         if (IS_ERR(resp))
 968                 return 0;
 969
 970         fw_ver = le16_to_cpu(*(__le16 *)resp->data);
 971
 972         dev_kfree_skb(resp);
 973
 974         return fw_ver;
 975 }
 976
 977 static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on)
 978 {
 979         struct port100 *dev = nfc_digital_get_drvdata(ddev);
 980         struct sk_buff *skb, *resp;
 981
 982         skb = port100_alloc_skb(dev, 1);
 983         if (!skb)
 984                 return -ENOMEM;
 985
 986         *skb_put(skb, 1) = on ? 1 : 0;
 987
 988         resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb);
 989
 990         if (IS_ERR(resp))
 991                 return PTR_ERR(resp);
 992
 993         dev_kfree_skb(resp);
 994
 995         return 0;
 996 }
 997
 998 static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf)
 999 {
1000         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1001         struct sk_buff *skb;
1002         struct sk_buff *resp;
1003         int rc;
1004
1005         if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1006                 return -EINVAL;
1007
1008         skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting));
1009         if (!skb)
1010                 return -ENOMEM;
1011
1012         memcpy(skb_put(skb, sizeof(struct port100_in_rf_setting)),
1013                &in_rf_settings[rf],
1014                sizeof(struct port100_in_rf_setting));
1015
1016         resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb);
1017
1018         if (IS_ERR(resp))
1019                 return PTR_ERR(resp);
1020
1021         rc = resp->data[0];
1022
1023         dev_kfree_skb(resp);
1024
1025         return rc;
1026 }
1027
1028 static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param)
1029 {
1030         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1031         struct port100_protocol *protocols;
1032         struct sk_buff *skb;
1033         struct sk_buff *resp;
1034         int num_protocols;
1035         size_t size;
1036         int rc;
1037
1038         if (param >= NFC_DIGITAL_FRAMING_LAST)
1039                 return -EINVAL;
1040
1041         protocols = in_protocols[param];
1042
1043         num_protocols = 0;
1044         while (protocols[num_protocols].number != PORT100_IN_PROT_END)
1045                 num_protocols++;
1046
1047         if (!num_protocols)
1048                 return 0;
1049
1050         size = sizeof(struct port100_protocol) * num_protocols;
1051
1052         skb = port100_alloc_skb(dev, size);
1053         if (!skb)
1054                 return -ENOMEM;
1055
1056         memcpy(skb_put(skb, size), protocols, size);
1057
1058         resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb);
1059
1060         if (IS_ERR(resp))
1061                 return PTR_ERR(resp);
1062
1063         rc = resp->data[0];
1064
1065         dev_kfree_skb(resp);
1066
1067         return rc;
1068 }
1069
1070 static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type,
1071                                    int param)
1072 {
1073         if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1074                 return port100_in_set_rf(ddev, param);
1075
1076         if (type == NFC_DIGITAL_CONFIG_FRAMING)
1077                 return port100_in_set_framing(ddev, param);
1078
1079         return -EINVAL;
1080 }
1081
1082 static void port100_in_comm_rf_complete(struct port100 *dev, void *arg,
1083                                        struct sk_buff *resp)
1084 {
1085         struct port100_cb_arg *cb_arg = arg;
1086         nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1087         u32 status;
1088         int rc;
1089
1090         if (IS_ERR(resp)) {
1091                 rc =  PTR_ERR(resp);
1092                 goto exit;
1093         }
1094
1095         if (resp->len < 4) {
1096                 nfc_err(&dev->interface->dev,
1097                         "Invalid packet length received.\n");
1098                 rc = -EIO;
1099                 goto error;
1100         }
1101
1102         status = le32_to_cpu(*(__le32 *)resp->data);
1103
1104         skb_pull(resp, sizeof(u32));
1105
1106         if (status == PORT100_CMD_STATUS_TIMEOUT) {
1107                 rc = -ETIMEDOUT;
1108                 goto error;
1109         }
1110
1111         if (status != PORT100_CMD_STATUS_OK) {
1112                 nfc_err(&dev->interface->dev,
1113                         "in_comm_rf failed with status 0x%08x\n", status);
1114                 rc = -EIO;
1115                 goto error;
1116         }
1117
1118         /* Remove collision bits byte */
1119         skb_pull(resp, 1);
1120
1121         goto exit;
1122
1123 error:
1124         kfree_skb(resp);
1125         resp = ERR_PTR(rc);
1126
1127 exit:
1128         cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1129
1130         kfree(cb_arg);
1131 }
1132
1133 static int port100_in_send_cmd(struct nfc_digital_dev *ddev,
1134                                struct sk_buff *skb, u16 _timeout,
1135                                nfc_digital_cmd_complete_t cb, void *arg)
1136 {
1137         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1138         struct port100_cb_arg *cb_arg;
1139         __le16 timeout;
1140
1141         cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1142         if (!cb_arg)
1143                 return -ENOMEM;
1144
1145         cb_arg->complete_cb = cb;
1146         cb_arg->complete_arg = arg;
1147
1148         timeout = cpu_to_le16(_timeout * 10);
1149
1150         memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16));
1151
1152         return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb,
1153                                       port100_in_comm_rf_complete, cb_arg);
1154 }
1155
1156 static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf)
1157 {
1158         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1159         struct sk_buff *skb;
1160         struct sk_buff *resp;
1161         int rc;
1162
1163         if (rf >= NFC_DIGITAL_RF_TECH_LAST)
1164                 return -EINVAL;
1165
1166         skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting));
1167         if (!skb)
1168                 return -ENOMEM;
1169
1170         memcpy(skb_put(skb, sizeof(struct port100_tg_rf_setting)),
1171                &tg_rf_settings[rf],
1172                sizeof(struct port100_tg_rf_setting));
1173
1174         resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb);
1175
1176         if (IS_ERR(resp))
1177                 return PTR_ERR(resp);
1178
1179         rc = resp->data[0];
1180
1181         dev_kfree_skb(resp);
1182
1183         return rc;
1184 }
1185
1186 static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param)
1187 {
1188         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1189         struct port100_protocol *protocols;
1190         struct sk_buff *skb;
1191         struct sk_buff *resp;
1192         int rc;
1193         int num_protocols;
1194         size_t size;
1195
1196         if (param >= NFC_DIGITAL_FRAMING_LAST)
1197                 return -EINVAL;
1198
1199         protocols = tg_protocols[param];
1200
1201         num_protocols = 0;
1202         while (protocols[num_protocols].number != PORT100_TG_PROT_END)
1203                 num_protocols++;
1204
1205         if (!num_protocols)
1206                 return 0;
1207
1208         size = sizeof(struct port100_protocol) * num_protocols;
1209
1210         skb = port100_alloc_skb(dev, size);
1211         if (!skb)
1212                 return -ENOMEM;
1213
1214         memcpy(skb_put(skb, size), protocols, size);
1215
1216         resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb);
1217
1218         if (IS_ERR(resp))
1219                 return PTR_ERR(resp);
1220
1221         rc = resp->data[0];
1222
1223         dev_kfree_skb(resp);
1224
1225         return rc;
1226 }
1227
1228 static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type,
1229                                    int param)
1230 {
1231         if (type == NFC_DIGITAL_CONFIG_RF_TECH)
1232                 return port100_tg_set_rf(ddev, param);
1233
1234         if (type == NFC_DIGITAL_CONFIG_FRAMING)
1235                 return port100_tg_set_framing(ddev, param);
1236
1237         return -EINVAL;
1238 }
1239
1240 static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated)
1241 {
1242         u8 mask;
1243
1244         switch (dev->cmd_type) {
1245         case PORT100_CMD_TYPE_0:
1246                 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK;
1247                 break;
1248         case PORT100_CMD_TYPE_1:
1249                 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK |
1250                        PORT100_MDAA_TGT_WAS_ACTIVATED_MASK;
1251                 break;
1252         default:
1253                 nfc_err(&dev->interface->dev, "Unknonwn command type.\n");
1254                 return false;
1255         }
1256
1257         return ((tgt_activated & mask) == mask);
1258 }
1259
1260 static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg,
1261                                         struct sk_buff *resp)
1262 {
1263         u32 status;
1264         struct port100_cb_arg *cb_arg = arg;
1265         nfc_digital_cmd_complete_t cb = cb_arg->complete_cb;
1266         struct port100_tg_comm_rf_res *hdr;
1267
1268         if (IS_ERR(resp))
1269                 goto exit;
1270
1271         hdr = (struct port100_tg_comm_rf_res *)resp->data;
1272
1273         status = le32_to_cpu(hdr->status);
1274
1275         if (cb_arg->mdaa &&
1276             !port100_tg_target_activated(dev, hdr->target_activated)) {
1277                 kfree_skb(resp);
1278                 resp = ERR_PTR(-ETIMEDOUT);
1279
1280                 goto exit;
1281         }
1282
1283         skb_pull(resp, sizeof(struct port100_tg_comm_rf_res));
1284
1285         if (status != PORT100_CMD_STATUS_OK) {
1286                 kfree_skb(resp);
1287
1288                 if (status == PORT100_CMD_STATUS_TIMEOUT)
1289                         resp = ERR_PTR(-ETIMEDOUT);
1290                 else
1291                         resp = ERR_PTR(-EIO);
1292         }
1293
1294 exit:
1295         cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp);
1296
1297         kfree(cb_arg);
1298 }
1299
1300 static int port100_tg_send_cmd(struct nfc_digital_dev *ddev,
1301                                struct sk_buff *skb, u16 timeout,
1302                                nfc_digital_cmd_complete_t cb, void *arg)
1303 {
1304         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1305         struct port100_tg_comm_rf_cmd *hdr;
1306         struct port100_cb_arg *cb_arg;
1307
1308         cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1309         if (!cb_arg)
1310                 return -ENOMEM;
1311
1312         cb_arg->complete_cb = cb;
1313         cb_arg->complete_arg = arg;
1314
1315         skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1316
1317         hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1318
1319         memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1320         hdr->guard_time = cpu_to_le16(500);
1321         hdr->send_timeout = cpu_to_le16(0xFFFF);
1322         hdr->recv_timeout = cpu_to_le16(timeout);
1323
1324         return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1325                                       port100_tg_comm_rf_complete, cb_arg);
1326 }
1327
1328 static int port100_listen_mdaa(struct nfc_digital_dev *ddev,
1329                                struct digital_tg_mdaa_params *params,
1330                                u16 timeout,
1331                                nfc_digital_cmd_complete_t cb, void *arg)
1332 {
1333         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1334         struct port100_tg_comm_rf_cmd *hdr;
1335         struct port100_cb_arg *cb_arg;
1336         struct sk_buff *skb;
1337         int rc;
1338
1339         rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
1340                                      NFC_DIGITAL_RF_TECH_106A);
1341         if (rc)
1342                 return rc;
1343
1344         rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1345                                      NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
1346         if (rc)
1347                 return rc;
1348
1349         cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL);
1350         if (!cb_arg)
1351                 return -ENOMEM;
1352
1353         cb_arg->complete_cb = cb;
1354         cb_arg->complete_arg = arg;
1355         cb_arg->mdaa = 1;
1356
1357         skb = port100_alloc_skb(dev, 0);
1358         if (!skb) {
1359                 kfree(cb_arg);
1360                 return -ENOMEM;
1361         }
1362
1363         skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd));
1364         hdr = (struct port100_tg_comm_rf_cmd *)skb->data;
1365
1366         memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd));
1367
1368         hdr->guard_time = 0;
1369         hdr->send_timeout = cpu_to_le16(0xFFFF);
1370         hdr->mdaa = 1;
1371         hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF;
1372         hdr->nfca_param[1] = params->sens_res & 0xFF;
1373         memcpy(hdr->nfca_param + 2, params->nfcid1, 3);
1374         hdr->nfca_param[5] = params->sel_res;
1375         memcpy(hdr->nfcf_param, params->nfcid2, 8);
1376         hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF;
1377         hdr->nfcf_param[17] = params->sc & 0xFF;
1378         hdr->recv_timeout = cpu_to_le16(timeout);
1379
1380         return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb,
1381                                       port100_tg_comm_rf_complete, cb_arg);
1382 }
1383
1384 static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout,
1385                           nfc_digital_cmd_complete_t cb, void *arg)
1386 {
1387         struct port100 *dev = nfc_digital_get_drvdata(ddev);
1388         struct sk_buff *skb;
1389
1390         skb = port100_alloc_skb(dev, 0);
1391         if (!skb)
1392                 return -ENOMEM;
1393
1394         return port100_tg_send_cmd(ddev, skb, timeout, cb, arg);
1395 }
1396
1397 static struct nfc_digital_ops port100_digital_ops = {
1398         .in_configure_hw = port100_in_configure_hw,
1399         .in_send_cmd = port100_in_send_cmd,
1400
1401         .tg_listen_mdaa = port100_listen_mdaa,
1402         .tg_listen = port100_listen,
1403         .tg_configure_hw = port100_tg_configure_hw,
1404         .tg_send_cmd = port100_tg_send_cmd,
1405
1406         .switch_rf = port100_switch_rf,
1407         .abort_cmd = port100_abort_cmd,
1408 };
1409
1410 static const struct usb_device_id port100_table[] = {
1411         { USB_DEVICE(SONY_VENDOR_ID, RCS380_PRODUCT_ID), },
1412         { }
1413 };
1414 MODULE_DEVICE_TABLE(usb, port100_table);
1415
1416 static int port100_probe(struct usb_interface *interface,
1417                          const struct usb_device_id *id)
1418 {
1419         struct port100 *dev;
1420         int rc;
1421         struct usb_host_interface *iface_desc;
1422         struct usb_endpoint_descriptor *endpoint;
1423         int in_endpoint;
1424         int out_endpoint;
1425         u16 fw_version;
1426         u64 cmd_type_mask;
1427         int i;
1428
1429         dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL);
1430         if (!dev)
1431                 return -ENOMEM;
1432
1433         dev->udev = usb_get_dev(interface_to_usbdev(interface));
1434         dev->interface = interface;
1435         usb_set_intfdata(interface, dev);
1436
1437         in_endpoint = out_endpoint = 0;
1438         iface_desc = interface->cur_altsetting;
1439         for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1440                 endpoint = &iface_desc->endpoint[i].desc;
1441
1442                 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
1443                         in_endpoint = endpoint->bEndpointAddress;
1444
1445                 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
1446                         out_endpoint = endpoint->bEndpointAddress;
1447         }
1448
1449         if (!in_endpoint || !out_endpoint) {
1450                 nfc_err(&interface->dev,
1451                         "Could not find bulk-in or bulk-out endpoint\n");
1452                 rc = -ENODEV;
1453                 goto error;
1454         }
1455
1456         dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1457         dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1458
1459         if (!dev->in_urb || !dev->out_urb) {
1460                 nfc_err(&interface->dev, "Could not allocate USB URBs\n");
1461                 rc = -ENOMEM;
1462                 goto error;
1463         }
1464
1465         usb_fill_bulk_urb(dev->in_urb, dev->udev,
1466                           usb_rcvbulkpipe(dev->udev, in_endpoint),
1467                           NULL, 0, NULL, dev);
1468         usb_fill_bulk_urb(dev->out_urb, dev->udev,
1469                           usb_sndbulkpipe(dev->udev, out_endpoint),
1470                           NULL, 0, port100_send_complete, dev);
1471
1472         dev->skb_headroom = PORT100_FRAME_HEADER_LEN +
1473                             PORT100_COMM_RF_HEAD_MAX_LEN;
1474         dev->skb_tailroom = PORT100_FRAME_TAIL_LEN;
1475
1476         INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete);
1477
1478         /* The first thing to do with the Port-100 is to set the command type
1479          * to be used. If supported we use command type 1. 0 otherwise.
1480          */
1481         cmd_type_mask = port100_get_command_type_mask(dev);
1482         if (!cmd_type_mask) {
1483                 nfc_err(&interface->dev,
1484                         "Could not get supported command types.\n");
1485                 rc = -ENODEV;
1486                 goto error;
1487         }
1488
1489         if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1))
1490                 dev->cmd_type = PORT100_CMD_TYPE_1;
1491         else
1492                 dev->cmd_type = PORT100_CMD_TYPE_0;
1493
1494         rc = port100_set_command_type(dev, dev->cmd_type);
1495         if (rc) {
1496                 nfc_err(&interface->dev,
1497                         "The device does not support command type %u.\n",
1498                         dev->cmd_type);
1499                 goto error;
1500         }
1501
1502         fw_version = port100_get_firmware_version(dev);
1503         if (!fw_version)
1504                 nfc_err(&interface->dev,
1505                         "Could not get device firmware version.\n");
1506
1507         nfc_info(&interface->dev,
1508                  "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n",
1509                  (fw_version & 0xFF00) >> 8, fw_version & 0xFF);
1510
1511         dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops,
1512                                                            PORT100_PROTOCOLS,
1513                                                            PORT100_CAPABILITIES,
1514                                                            dev->skb_headroom,
1515                                                            dev->skb_tailroom);
1516         if (!dev->nfc_digital_dev) {
1517                 nfc_err(&interface->dev,
1518                         "Could not allocate nfc_digital_dev.\n");
1519                 rc = -ENOMEM;
1520                 goto error;
1521         }
1522
1523         nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev);
1524         nfc_digital_set_drvdata(dev->nfc_digital_dev, dev);
1525
1526         rc = nfc_digital_register_device(dev->nfc_digital_dev);
1527         if (rc) {
1528                 nfc_err(&interface->dev,
1529                         "Could not register digital device.\n");
1530                 goto free_nfc_dev;
1531         }
1532
1533         return 0;
1534
1535 free_nfc_dev:
1536         nfc_digital_free_device(dev->nfc_digital_dev);
1537
1538 error:
1539         usb_free_urb(dev->in_urb);
1540         usb_free_urb(dev->out_urb);
1541         usb_put_dev(dev->udev);
1542
1543         return rc;
1544 }
1545
1546 static void port100_disconnect(struct usb_interface *interface)
1547 {
1548         struct port100 *dev;
1549
1550         dev = usb_get_intfdata(interface);
1551         usb_set_intfdata(interface, NULL);
1552
1553         nfc_digital_unregister_device(dev->nfc_digital_dev);
1554         nfc_digital_free_device(dev->nfc_digital_dev);
1555
1556         usb_kill_urb(dev->in_urb);
1557         usb_kill_urb(dev->out_urb);
1558
1559         usb_free_urb(dev->in_urb);
1560         usb_free_urb(dev->out_urb);
1561         usb_put_dev(dev->udev);
1562
1563         kfree(dev->cmd);
1564
1565         nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected");
1566 }
1567
1568 static struct usb_driver port100_driver = {
1569         .name =         "port100",
1570         .probe =        port100_probe,
1571         .disconnect =   port100_disconnect,
1572         .id_table =     port100_table,
1573 };
1574
1575 module_usb_driver(port100_driver);
1576
1577 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION);
1578 MODULE_VERSION(VERSION);
1579 MODULE_LICENSE("GPL");