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