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"); 1546