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