1 /* 2 * Sony NFC Port-100 Series driver 3 * Copyright (c) 2013, Intel Corporation. 4 * 5 * Partly based/Inspired by Stephen Tiedemann's nfcpy 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms and conditions of the GNU General Public License, 9 * version 2, as published by the Free Software Foundation. 10 * 11 * This program is distributed in the hope it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 14 * more details. 15 * 16 */ 17 18 #include <linux/module.h> 19 #include <linux/usb.h> 20 #include <net/nfc/digital.h> 21 22 #define VERSION "0.1" 23 24 #define SONY_VENDOR_ID 0x054c 25 #define RCS380_PRODUCT_ID 0x06c1 26 27 #define PORT100_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \ 28 NFC_PROTO_MIFARE_MASK | \ 29 NFC_PROTO_FELICA_MASK | \ 30 NFC_PROTO_NFC_DEP_MASK | \ 31 NFC_PROTO_ISO14443_MASK | \ 32 NFC_PROTO_ISO14443_B_MASK) 33 34 #define PORT100_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \ 35 NFC_DIGITAL_DRV_CAPS_TG_CRC) 36 37 /* Standard port100 frame definitions */ 38 #define PORT100_FRAME_HEADER_LEN (sizeof(struct port100_frame) \ 39 + 2) /* data[0] CC, data[1] SCC */ 40 #define PORT100_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/ 41 42 #define PORT100_COMM_RF_HEAD_MAX_LEN (sizeof(struct port100_tg_comm_rf_cmd)) 43 44 /* 45 * Max extended frame payload len, excluding CC and SCC 46 * which are already in PORT100_FRAME_HEADER_LEN. 47 */ 48 #define PORT100_FRAME_MAX_PAYLOAD_LEN 1001 49 50 #define PORT100_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2), 51 Postamble (1) */ 52 static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = { 53 0x00, 0x00, 0xff, 0x00, 0xff, 0x00 54 }; 55 56 #define PORT100_FRAME_CHECKSUM(f) (f->data[le16_to_cpu(f->datalen)]) 57 #define PORT100_FRAME_POSTAMBLE(f) (f->data[le16_to_cpu(f->datalen) + 1]) 58 59 /* start of frame */ 60 #define PORT100_FRAME_SOF 0x00FF 61 #define PORT100_FRAME_EXT 0xFFFF 62 #define PORT100_FRAME_ACK 0x00FF 63 64 /* Port-100 command: in or out */ 65 #define PORT100_FRAME_DIRECTION(f) (f->data[0]) /* CC */ 66 #define PORT100_FRAME_DIR_OUT 0xD6 67 #define PORT100_FRAME_DIR_IN 0xD7 68 69 /* Port-100 sub-command */ 70 #define PORT100_FRAME_CMD(f) (f->data[1]) /* SCC */ 71 72 #define PORT100_CMD_GET_FIRMWARE_VERSION 0x20 73 #define PORT100_CMD_GET_COMMAND_TYPE 0x28 74 #define PORT100_CMD_SET_COMMAND_TYPE 0x2A 75 76 #define PORT100_CMD_IN_SET_RF 0x00 77 #define PORT100_CMD_IN_SET_PROTOCOL 0x02 78 #define PORT100_CMD_IN_COMM_RF 0x04 79 80 #define PORT100_CMD_TG_SET_RF 0x40 81 #define PORT100_CMD_TG_SET_PROTOCOL 0x42 82 #define PORT100_CMD_TG_SET_RF_OFF 0x46 83 #define PORT100_CMD_TG_COMM_RF 0x48 84 85 #define PORT100_CMD_SWITCH_RF 0x06 86 87 #define PORT100_CMD_RESPONSE(cmd) (cmd + 1) 88 89 #define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \ 90 ((mask) & (0x01 << (cmd_type))) 91 #define PORT100_CMD_TYPE_0 0 92 #define PORT100_CMD_TYPE_1 1 93 94 #define PORT100_CMD_STATUS_OK 0x00 95 #define PORT100_CMD_STATUS_TIMEOUT 0x80 96 97 #define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01 98 #define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK 0x02 99 100 struct port100; 101 102 typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg, 103 struct sk_buff *resp); 104 105 /** 106 * Setting sets structure for in_set_rf command 107 * 108 * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table. 109 * This table contains multiple RF setting sets required for RF 110 * communication. 111 * 112 * @in_*_comm_type: Theses fields set the communication type to be used. 113 */ 114 struct port100_in_rf_setting { 115 u8 in_send_set_number; 116 u8 in_send_comm_type; 117 u8 in_recv_set_number; 118 u8 in_recv_comm_type; 119 } __packed; 120 121 #define PORT100_COMM_TYPE_IN_212F 0x01 122 #define PORT100_COMM_TYPE_IN_424F 0x02 123 #define PORT100_COMM_TYPE_IN_106A 0x03 124 #define PORT100_COMM_TYPE_IN_106B 0x07 125 126 static const struct port100_in_rf_setting in_rf_settings[] = { 127 [NFC_DIGITAL_RF_TECH_212F] = { 128 .in_send_set_number = 1, 129 .in_send_comm_type = PORT100_COMM_TYPE_IN_212F, 130 .in_recv_set_number = 15, 131 .in_recv_comm_type = PORT100_COMM_TYPE_IN_212F, 132 }, 133 [NFC_DIGITAL_RF_TECH_424F] = { 134 .in_send_set_number = 1, 135 .in_send_comm_type = PORT100_COMM_TYPE_IN_424F, 136 .in_recv_set_number = 15, 137 .in_recv_comm_type = PORT100_COMM_TYPE_IN_424F, 138 }, 139 [NFC_DIGITAL_RF_TECH_106A] = { 140 .in_send_set_number = 2, 141 .in_send_comm_type = PORT100_COMM_TYPE_IN_106A, 142 .in_recv_set_number = 15, 143 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106A, 144 }, 145 [NFC_DIGITAL_RF_TECH_106B] = { 146 .in_send_set_number = 3, 147 .in_send_comm_type = PORT100_COMM_TYPE_IN_106B, 148 .in_recv_set_number = 15, 149 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106B, 150 }, 151 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */ 152 [NFC_DIGITAL_RF_TECH_LAST] = { 0 }, 153 }; 154 155 /** 156 * Setting sets structure for tg_set_rf command 157 * 158 * @tg_set_number: Represents the entry index in the port-100 RF Base Table. 159 * This table contains multiple RF setting sets required for RF 160 * communication. this field is used for both send and receive 161 * settings. 162 * 163 * @tg_comm_type: Sets the communication type to be used to send and receive 164 * data. 165 */ 166 struct port100_tg_rf_setting { 167 u8 tg_set_number; 168 u8 tg_comm_type; 169 } __packed; 170 171 #define PORT100_COMM_TYPE_TG_106A 0x0B 172 #define PORT100_COMM_TYPE_TG_212F 0x0C 173 #define PORT100_COMM_TYPE_TG_424F 0x0D 174 175 static const struct port100_tg_rf_setting tg_rf_settings[] = { 176 [NFC_DIGITAL_RF_TECH_106A] = { 177 .tg_set_number = 8, 178 .tg_comm_type = PORT100_COMM_TYPE_TG_106A, 179 }, 180 [NFC_DIGITAL_RF_TECH_212F] = { 181 .tg_set_number = 8, 182 .tg_comm_type = PORT100_COMM_TYPE_TG_212F, 183 }, 184 [NFC_DIGITAL_RF_TECH_424F] = { 185 .tg_set_number = 8, 186 .tg_comm_type = PORT100_COMM_TYPE_TG_424F, 187 }, 188 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */ 189 [NFC_DIGITAL_RF_TECH_LAST] = { 0 }, 190 191 }; 192 193 #define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00 194 #define PORT100_IN_PROT_ADD_CRC 0x01 195 #define PORT100_IN_PROT_CHECK_CRC 0x02 196 #define PORT100_IN_PROT_MULTI_CARD 0x03 197 #define PORT100_IN_PROT_ADD_PARITY 0x04 198 #define PORT100_IN_PROT_CHECK_PARITY 0x05 199 #define PORT100_IN_PROT_BITWISE_AC_RECV_MODE 0x06 200 #define PORT100_IN_PROT_VALID_BIT_NUMBER 0x07 201 #define PORT100_IN_PROT_CRYPTO1 0x08 202 #define PORT100_IN_PROT_ADD_SOF 0x09 203 #define PORT100_IN_PROT_CHECK_SOF 0x0A 204 #define PORT100_IN_PROT_ADD_EOF 0x0B 205 #define PORT100_IN_PROT_CHECK_EOF 0x0C 206 #define PORT100_IN_PROT_DEAF_TIME 0x0E 207 #define PORT100_IN_PROT_CRM 0x0F 208 #define PORT100_IN_PROT_CRM_MIN_LEN 0x10 209 #define PORT100_IN_PROT_T1_TAG_FRAME 0x11 210 #define PORT100_IN_PROT_RFCA 0x12 211 #define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13 212 #define PORT100_IN_PROT_END 0x14 213 214 #define PORT100_IN_MAX_NUM_PROTOCOLS 19 215 216 #define PORT100_TG_PROT_TU 0x00 217 #define PORT100_TG_PROT_RF_OFF 0x01 218 #define PORT100_TG_PROT_CRM 0x02 219 #define PORT100_TG_PROT_END 0x03 220 221 #define PORT100_TG_MAX_NUM_PROTOCOLS 3 222 223 struct port100_protocol { 224 u8 number; 225 u8 value; 226 } __packed; 227 228 static struct port100_protocol 229 in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = { 230 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = { 231 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 }, 232 { PORT100_IN_PROT_ADD_CRC, 0 }, 233 { PORT100_IN_PROT_CHECK_CRC, 0 }, 234 { PORT100_IN_PROT_MULTI_CARD, 0 }, 235 { PORT100_IN_PROT_ADD_PARITY, 0 }, 236 { PORT100_IN_PROT_CHECK_PARITY, 1 }, 237 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 238 { PORT100_IN_PROT_VALID_BIT_NUMBER, 7 }, 239 { PORT100_IN_PROT_CRYPTO1, 0 }, 240 { PORT100_IN_PROT_ADD_SOF, 0 }, 241 { PORT100_IN_PROT_CHECK_SOF, 0 }, 242 { PORT100_IN_PROT_ADD_EOF, 0 }, 243 { PORT100_IN_PROT_CHECK_EOF, 0 }, 244 { PORT100_IN_PROT_DEAF_TIME, 4 }, 245 { PORT100_IN_PROT_CRM, 0 }, 246 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 247 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 248 { PORT100_IN_PROT_RFCA, 0 }, 249 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 250 { PORT100_IN_PROT_END, 0 }, 251 }, 252 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = { 253 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 }, 254 { PORT100_IN_PROT_ADD_CRC, 0 }, 255 { PORT100_IN_PROT_CHECK_CRC, 0 }, 256 { PORT100_IN_PROT_MULTI_CARD, 0 }, 257 { PORT100_IN_PROT_ADD_PARITY, 1 }, 258 { PORT100_IN_PROT_CHECK_PARITY, 1 }, 259 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 260 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 261 { PORT100_IN_PROT_CRYPTO1, 0 }, 262 { PORT100_IN_PROT_ADD_SOF, 0 }, 263 { PORT100_IN_PROT_CHECK_SOF, 0 }, 264 { PORT100_IN_PROT_ADD_EOF, 0 }, 265 { PORT100_IN_PROT_CHECK_EOF, 0 }, 266 { PORT100_IN_PROT_DEAF_TIME, 4 }, 267 { PORT100_IN_PROT_CRM, 0 }, 268 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 269 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 270 { PORT100_IN_PROT_RFCA, 0 }, 271 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 272 { PORT100_IN_PROT_END, 0 }, 273 }, 274 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = { 275 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 }, 276 { PORT100_IN_PROT_ADD_CRC, 1 }, 277 { PORT100_IN_PROT_CHECK_CRC, 1 }, 278 { PORT100_IN_PROT_MULTI_CARD, 0 }, 279 { PORT100_IN_PROT_ADD_PARITY, 1 }, 280 { PORT100_IN_PROT_CHECK_PARITY, 1 }, 281 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 282 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 283 { PORT100_IN_PROT_CRYPTO1, 0 }, 284 { PORT100_IN_PROT_ADD_SOF, 0 }, 285 { PORT100_IN_PROT_CHECK_SOF, 0 }, 286 { PORT100_IN_PROT_ADD_EOF, 0 }, 287 { PORT100_IN_PROT_CHECK_EOF, 0 }, 288 { PORT100_IN_PROT_DEAF_TIME, 4 }, 289 { PORT100_IN_PROT_CRM, 0 }, 290 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 291 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 292 { PORT100_IN_PROT_RFCA, 0 }, 293 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 294 { PORT100_IN_PROT_END, 0 }, 295 }, 296 [NFC_DIGITAL_FRAMING_NFCA_T1T] = { 297 /* nfc_digital_framing_nfca_short */ 298 { PORT100_IN_PROT_ADD_CRC, 2 }, 299 { PORT100_IN_PROT_CHECK_CRC, 2 }, 300 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 301 { PORT100_IN_PROT_T1_TAG_FRAME, 2 }, 302 { PORT100_IN_PROT_END, 0 }, 303 }, 304 [NFC_DIGITAL_FRAMING_NFCA_T2T] = { 305 /* nfc_digital_framing_nfca_standard */ 306 { PORT100_IN_PROT_ADD_CRC, 1 }, 307 { PORT100_IN_PROT_CHECK_CRC, 0 }, 308 { PORT100_IN_PROT_END, 0 }, 309 }, 310 [NFC_DIGITAL_FRAMING_NFCA_T4T] = { 311 /* nfc_digital_framing_nfca_standard_with_crc_a */ 312 { PORT100_IN_PROT_END, 0 }, 313 }, 314 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = { 315 /* nfc_digital_framing_nfca_standard */ 316 { PORT100_IN_PROT_END, 0 }, 317 }, 318 [NFC_DIGITAL_FRAMING_NFCF] = { 319 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 }, 320 { PORT100_IN_PROT_ADD_CRC, 1 }, 321 { PORT100_IN_PROT_CHECK_CRC, 1 }, 322 { PORT100_IN_PROT_MULTI_CARD, 0 }, 323 { PORT100_IN_PROT_ADD_PARITY, 0 }, 324 { PORT100_IN_PROT_CHECK_PARITY, 0 }, 325 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 326 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 327 { PORT100_IN_PROT_CRYPTO1, 0 }, 328 { PORT100_IN_PROT_ADD_SOF, 0 }, 329 { PORT100_IN_PROT_CHECK_SOF, 0 }, 330 { PORT100_IN_PROT_ADD_EOF, 0 }, 331 { PORT100_IN_PROT_CHECK_EOF, 0 }, 332 { PORT100_IN_PROT_DEAF_TIME, 4 }, 333 { PORT100_IN_PROT_CRM, 0 }, 334 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 335 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 336 { PORT100_IN_PROT_RFCA, 0 }, 337 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 338 { PORT100_IN_PROT_END, 0 }, 339 }, 340 [NFC_DIGITAL_FRAMING_NFCF_T3T] = { 341 /* nfc_digital_framing_nfcf */ 342 { PORT100_IN_PROT_END, 0 }, 343 }, 344 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = { 345 /* nfc_digital_framing_nfcf */ 346 { PORT100_IN_PROT_END, 0 }, 347 }, 348 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = { 349 { PORT100_IN_PROT_END, 0 }, 350 }, 351 [NFC_DIGITAL_FRAMING_NFCB] = { 352 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 20 }, 353 { PORT100_IN_PROT_ADD_CRC, 1 }, 354 { PORT100_IN_PROT_CHECK_CRC, 1 }, 355 { PORT100_IN_PROT_MULTI_CARD, 0 }, 356 { PORT100_IN_PROT_ADD_PARITY, 0 }, 357 { PORT100_IN_PROT_CHECK_PARITY, 0 }, 358 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 359 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 360 { PORT100_IN_PROT_CRYPTO1, 0 }, 361 { PORT100_IN_PROT_ADD_SOF, 1 }, 362 { PORT100_IN_PROT_CHECK_SOF, 1 }, 363 { PORT100_IN_PROT_ADD_EOF, 1 }, 364 { PORT100_IN_PROT_CHECK_EOF, 1 }, 365 { PORT100_IN_PROT_DEAF_TIME, 4 }, 366 { PORT100_IN_PROT_CRM, 0 }, 367 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 368 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 369 { PORT100_IN_PROT_RFCA, 0 }, 370 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 371 { PORT100_IN_PROT_END, 0 }, 372 }, 373 [NFC_DIGITAL_FRAMING_NFCB_T4T] = { 374 /* nfc_digital_framing_nfcb */ 375 { PORT100_IN_PROT_END, 0 }, 376 }, 377 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */ 378 [NFC_DIGITAL_FRAMING_LAST] = { 379 { PORT100_IN_PROT_END, 0 }, 380 }, 381 }; 382 383 static struct port100_protocol 384 tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = { 385 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = { 386 { PORT100_TG_PROT_END, 0 }, 387 }, 388 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = { 389 { PORT100_TG_PROT_END, 0 }, 390 }, 391 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = { 392 { PORT100_TG_PROT_END, 0 }, 393 }, 394 [NFC_DIGITAL_FRAMING_NFCA_T1T] = { 395 { PORT100_TG_PROT_END, 0 }, 396 }, 397 [NFC_DIGITAL_FRAMING_NFCA_T2T] = { 398 { PORT100_TG_PROT_END, 0 }, 399 }, 400 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = { 401 { PORT100_TG_PROT_TU, 1 }, 402 { PORT100_TG_PROT_RF_OFF, 0 }, 403 { PORT100_TG_PROT_CRM, 7 }, 404 { PORT100_TG_PROT_END, 0 }, 405 }, 406 [NFC_DIGITAL_FRAMING_NFCF] = { 407 { PORT100_TG_PROT_END, 0 }, 408 }, 409 [NFC_DIGITAL_FRAMING_NFCF_T3T] = { 410 { PORT100_TG_PROT_END, 0 }, 411 }, 412 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = { 413 { PORT100_TG_PROT_TU, 1 }, 414 { PORT100_TG_PROT_RF_OFF, 0 }, 415 { PORT100_TG_PROT_CRM, 7 }, 416 { PORT100_TG_PROT_END, 0 }, 417 }, 418 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = { 419 { PORT100_TG_PROT_RF_OFF, 1 }, 420 { PORT100_TG_PROT_END, 0 }, 421 }, 422 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */ 423 [NFC_DIGITAL_FRAMING_LAST] = { 424 { PORT100_TG_PROT_END, 0 }, 425 }, 426 }; 427 428 struct port100 { 429 struct nfc_digital_dev *nfc_digital_dev; 430 431 int skb_headroom; 432 int skb_tailroom; 433 434 struct usb_device *udev; 435 struct usb_interface *interface; 436 437 struct urb *out_urb; 438 struct urb *in_urb; 439 440 struct work_struct cmd_complete_work; 441 442 u8 cmd_type; 443 444 /* The digital stack serializes commands to be sent. There is no need 445 * for any queuing/locking mechanism at driver level. 446 */ 447 struct port100_cmd *cmd; 448 }; 449 450 struct port100_cmd { 451 u8 code; 452 int status; 453 struct sk_buff *req; 454 struct sk_buff *resp; 455 int resp_len; 456 port100_send_async_complete_t complete_cb; 457 void *complete_cb_context; 458 }; 459 460 struct port100_frame { 461 u8 preamble; 462 __be16 start_frame; 463 __be16 extended_frame; 464 __le16 datalen; 465 u8 datalen_checksum; 466 u8 data[]; 467 } __packed; 468 469 struct port100_ack_frame { 470 u8 preamble; 471 __be16 start_frame; 472 __be16 ack_frame; 473 u8 postambule; 474 } __packed; 475 476 struct port100_cb_arg { 477 nfc_digital_cmd_complete_t complete_cb; 478 void *complete_arg; 479 u8 mdaa; 480 }; 481 482 struct port100_tg_comm_rf_cmd { 483 __le16 guard_time; 484 __le16 send_timeout; 485 u8 mdaa; 486 u8 nfca_param[6]; 487 u8 nfcf_param[18]; 488 u8 mf_halted; 489 u8 arae_flag; 490 __le16 recv_timeout; 491 u8 data[]; 492 } __packed; 493 494 struct port100_tg_comm_rf_res { 495 u8 comm_type; 496 u8 ar_status; 497 u8 target_activated; 498 __le32 status; 499 u8 data[]; 500 } __packed; 501 502 /* The rule: value + checksum = 0 */ 503 static inline u8 port100_checksum(u16 value) 504 { 505 return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1; 506 } 507 508 /* The rule: sum(data elements) + checksum = 0 */ 509 static u8 port100_data_checksum(u8 *data, int datalen) 510 { 511 u8 sum = 0; 512 int i; 513 514 for (i = 0; i < datalen; i++) 515 sum += data[i]; 516 517 return port100_checksum(sum); 518 } 519 520 static void port100_tx_frame_init(void *_frame, u8 cmd_code) 521 { 522 struct port100_frame *frame = _frame; 523 524 frame->preamble = 0; 525 frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF); 526 frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT); 527 PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT; 528 PORT100_FRAME_CMD(frame) = cmd_code; 529 frame->datalen = cpu_to_le16(2); 530 } 531 532 static void port100_tx_frame_finish(void *_frame) 533 { 534 struct port100_frame *frame = _frame; 535 536 frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen)); 537 538 PORT100_FRAME_CHECKSUM(frame) = 539 port100_data_checksum(frame->data, le16_to_cpu(frame->datalen)); 540 541 PORT100_FRAME_POSTAMBLE(frame) = 0; 542 } 543 544 static void port100_tx_update_payload_len(void *_frame, int len) 545 { 546 struct port100_frame *frame = _frame; 547 548 frame->datalen = cpu_to_le16(le16_to_cpu(frame->datalen) + len); 549 } 550 551 static bool port100_rx_frame_is_valid(void *_frame) 552 { 553 u8 checksum; 554 struct port100_frame *frame = _frame; 555 556 if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) || 557 frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT)) 558 return false; 559 560 checksum = port100_checksum(le16_to_cpu(frame->datalen)); 561 if (checksum != frame->datalen_checksum) 562 return false; 563 564 checksum = port100_data_checksum(frame->data, 565 le16_to_cpu(frame->datalen)); 566 if (checksum != PORT100_FRAME_CHECKSUM(frame)) 567 return false; 568 569 return true; 570 } 571 572 static bool port100_rx_frame_is_ack(struct port100_ack_frame *frame) 573 { 574 return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) && 575 frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK)); 576 } 577 578 static inline int port100_rx_frame_size(void *frame) 579 { 580 struct port100_frame *f = frame; 581 582 return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) + 583 PORT100_FRAME_TAIL_LEN; 584 } 585 586 static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame) 587 { 588 struct port100_frame *f = frame; 589 590 return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code)); 591 } 592 593 static void port100_recv_response(struct urb *urb) 594 { 595 struct port100 *dev = urb->context; 596 struct port100_cmd *cmd = dev->cmd; 597 u8 *in_frame; 598 599 cmd->status = urb->status; 600 601 switch (urb->status) { 602 case 0: 603 break; /* success */ 604 case -ECONNRESET: 605 case -ENOENT: 606 nfc_err(&dev->interface->dev, 607 "The urb has been canceled (status %d)", urb->status); 608 goto sched_wq; 609 case -ESHUTDOWN: 610 default: 611 nfc_err(&dev->interface->dev, "Urb failure (status %d)", 612 urb->status); 613 goto sched_wq; 614 } 615 616 in_frame = dev->in_urb->transfer_buffer; 617 618 if (!port100_rx_frame_is_valid(in_frame)) { 619 nfc_err(&dev->interface->dev, "Received an invalid frame"); 620 cmd->status = -EIO; 621 goto sched_wq; 622 } 623 624 print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame, 625 port100_rx_frame_size(in_frame), false); 626 627 if (!port100_rx_frame_is_cmd_response(dev, in_frame)) { 628 nfc_err(&dev->interface->dev, 629 "It's not the response to the last command"); 630 cmd->status = -EIO; 631 goto sched_wq; 632 } 633 634 sched_wq: 635 schedule_work(&dev->cmd_complete_work); 636 } 637 638 static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags) 639 { 640 dev->in_urb->complete = port100_recv_response; 641 642 return usb_submit_urb(dev->in_urb, flags); 643 } 644 645 static void port100_recv_ack(struct urb *urb) 646 { 647 struct port100 *dev = urb->context; 648 struct port100_cmd *cmd = dev->cmd; 649 struct port100_ack_frame *in_frame; 650 int rc; 651 652 cmd->status = urb->status; 653 654 switch (urb->status) { 655 case 0: 656 break; /* success */ 657 case -ECONNRESET: 658 case -ENOENT: 659 nfc_err(&dev->interface->dev, 660 "The urb has been stopped (status %d)", urb->status); 661 goto sched_wq; 662 case -ESHUTDOWN: 663 default: 664 nfc_err(&dev->interface->dev, "Urb failure (status %d)", 665 urb->status); 666 goto sched_wq; 667 } 668 669 in_frame = dev->in_urb->transfer_buffer; 670 671 if (!port100_rx_frame_is_ack(in_frame)) { 672 nfc_err(&dev->interface->dev, "Received an invalid ack"); 673 cmd->status = -EIO; 674 goto sched_wq; 675 } 676 677 rc = port100_submit_urb_for_response(dev, GFP_ATOMIC); 678 if (rc) { 679 nfc_err(&dev->interface->dev, 680 "usb_submit_urb failed with result %d", rc); 681 cmd->status = rc; 682 goto sched_wq; 683 } 684 685 return; 686 687 sched_wq: 688 schedule_work(&dev->cmd_complete_work); 689 } 690 691 static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags) 692 { 693 dev->in_urb->complete = port100_recv_ack; 694 695 return usb_submit_urb(dev->in_urb, flags); 696 } 697 698 static int port100_send_ack(struct port100 *dev) 699 { 700 int rc; 701 702 dev->out_urb->transfer_buffer = ack_frame; 703 dev->out_urb->transfer_buffer_length = sizeof(ack_frame); 704 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL); 705 706 return rc; 707 } 708 709 static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out, 710 struct sk_buff *in, int in_len) 711 { 712 int rc; 713 714 dev->out_urb->transfer_buffer = out->data; 715 dev->out_urb->transfer_buffer_length = out->len; 716 717 dev->in_urb->transfer_buffer = in->data; 718 dev->in_urb->transfer_buffer_length = in_len; 719 720 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1, 721 out->data, out->len, false); 722 723 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL); 724 if (rc) 725 return rc; 726 727 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL); 728 if (rc) 729 goto error; 730 731 return 0; 732 733 error: 734 usb_unlink_urb(dev->out_urb); 735 return rc; 736 } 737 738 static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code, 739 struct sk_buff *skb) 740 { 741 /* payload is already there, just update datalen */ 742 int payload_len = skb->len; 743 744 skb_push(skb, PORT100_FRAME_HEADER_LEN); 745 skb_put(skb, PORT100_FRAME_TAIL_LEN); 746 747 port100_tx_frame_init(skb->data, cmd_code); 748 port100_tx_update_payload_len(skb->data, payload_len); 749 port100_tx_frame_finish(skb->data); 750 } 751 752 static void port100_send_async_complete(struct port100 *dev) 753 { 754 struct port100_cmd *cmd = dev->cmd; 755 int status = cmd->status; 756 757 struct sk_buff *req = cmd->req; 758 struct sk_buff *resp = cmd->resp; 759 760 dev_kfree_skb(req); 761 762 dev->cmd = NULL; 763 764 if (status < 0) { 765 cmd->complete_cb(dev, cmd->complete_cb_context, 766 ERR_PTR(status)); 767 dev_kfree_skb(resp); 768 goto done; 769 } 770 771 skb_put(resp, port100_rx_frame_size(resp->data)); 772 skb_pull(resp, PORT100_FRAME_HEADER_LEN); 773 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN); 774 775 cmd->complete_cb(dev, cmd->complete_cb_context, resp); 776 777 done: 778 kfree(cmd); 779 } 780 781 static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code, 782 struct sk_buff *req, 783 port100_send_async_complete_t complete_cb, 784 void *complete_cb_context) 785 { 786 struct port100_cmd *cmd; 787 struct sk_buff *resp; 788 int rc; 789 int resp_len = PORT100_FRAME_HEADER_LEN + 790 PORT100_FRAME_MAX_PAYLOAD_LEN + 791 PORT100_FRAME_TAIL_LEN; 792 793 resp = alloc_skb(resp_len, GFP_KERNEL); 794 if (!resp) 795 return -ENOMEM; 796 797 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 798 if (!cmd) { 799 dev_kfree_skb(resp); 800 return -ENOMEM; 801 } 802 803 cmd->code = cmd_code; 804 cmd->req = req; 805 cmd->resp = resp; 806 cmd->resp_len = resp_len; 807 cmd->complete_cb = complete_cb; 808 cmd->complete_cb_context = complete_cb_context; 809 810 port100_build_cmd_frame(dev, cmd_code, req); 811 812 dev->cmd = cmd; 813 814 rc = port100_send_frame_async(dev, req, resp, resp_len); 815 if (rc) { 816 kfree(cmd); 817 dev_kfree_skb(resp); 818 dev->cmd = NULL; 819 } 820 821 return rc; 822 } 823 824 struct port100_sync_cmd_response { 825 struct sk_buff *resp; 826 struct completion done; 827 }; 828 829 static void port100_wq_cmd_complete(struct work_struct *work) 830 { 831 struct port100 *dev = container_of(work, struct port100, 832 cmd_complete_work); 833 834 port100_send_async_complete(dev); 835 } 836 837 static void port100_send_sync_complete(struct port100 *dev, void *_arg, 838 struct sk_buff *resp) 839 { 840 struct port100_sync_cmd_response *arg = _arg; 841 842 arg->resp = resp; 843 complete(&arg->done); 844 } 845 846 static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code, 847 struct sk_buff *req) 848 { 849 int rc; 850 struct port100_sync_cmd_response arg; 851 852 init_completion(&arg.done); 853 854 rc = port100_send_cmd_async(dev, cmd_code, req, 855 port100_send_sync_complete, &arg); 856 if (rc) { 857 dev_kfree_skb(req); 858 return ERR_PTR(rc); 859 } 860 861 wait_for_completion(&arg.done); 862 863 return arg.resp; 864 } 865 866 static void port100_send_complete(struct urb *urb) 867 { 868 struct port100 *dev = urb->context; 869 870 switch (urb->status) { 871 case 0: 872 break; /* success */ 873 case -ECONNRESET: 874 case -ENOENT: 875 nfc_err(&dev->interface->dev, 876 "The urb has been stopped (status %d)", urb->status); 877 break; 878 case -ESHUTDOWN: 879 default: 880 nfc_err(&dev->interface->dev, "Urb failure (status %d)", 881 urb->status); 882 } 883 } 884 885 static void port100_abort_cmd(struct nfc_digital_dev *ddev) 886 { 887 struct port100 *dev = nfc_digital_get_drvdata(ddev); 888 889 /* An ack will cancel the last issued command */ 890 port100_send_ack(dev); 891 892 /* cancel the urb request */ 893 usb_kill_urb(dev->in_urb); 894 } 895 896 static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size) 897 { 898 struct sk_buff *skb; 899 900 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size, 901 GFP_KERNEL); 902 if (skb) 903 skb_reserve(skb, dev->skb_headroom); 904 905 return skb; 906 } 907 908 static int port100_set_command_type(struct port100 *dev, u8 command_type) 909 { 910 struct sk_buff *skb; 911 struct sk_buff *resp; 912 int rc; 913 914 skb = port100_alloc_skb(dev, 1); 915 if (!skb) 916 return -ENOMEM; 917 918 *skb_put(skb, sizeof(u8)) = command_type; 919 920 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb); 921 if (IS_ERR(resp)) 922 return PTR_ERR(resp); 923 924 rc = resp->data[0]; 925 926 dev_kfree_skb(resp); 927 928 return rc; 929 } 930 931 static u64 port100_get_command_type_mask(struct port100 *dev) 932 { 933 struct sk_buff *skb; 934 struct sk_buff *resp; 935 u64 mask; 936 937 skb = port100_alloc_skb(dev, 0); 938 if (!skb) 939 return -ENOMEM; 940 941 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb); 942 if (IS_ERR(resp)) 943 return PTR_ERR(resp); 944 945 if (resp->len < 8) 946 mask = 0; 947 else 948 mask = be64_to_cpu(*(__be64 *)resp->data); 949 950 dev_kfree_skb(resp); 951 952 return mask; 953 } 954 955 static u16 port100_get_firmware_version(struct port100 *dev) 956 { 957 struct sk_buff *skb; 958 struct sk_buff *resp; 959 u16 fw_ver; 960 961 skb = port100_alloc_skb(dev, 0); 962 if (!skb) 963 return 0; 964 965 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION, 966 skb); 967 if (IS_ERR(resp)) 968 return 0; 969 970 fw_ver = le16_to_cpu(*(__le16 *)resp->data); 971 972 dev_kfree_skb(resp); 973 974 return fw_ver; 975 } 976 977 static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on) 978 { 979 struct port100 *dev = nfc_digital_get_drvdata(ddev); 980 struct sk_buff *skb, *resp; 981 982 skb = port100_alloc_skb(dev, 1); 983 if (!skb) 984 return -ENOMEM; 985 986 *skb_put(skb, 1) = on ? 1 : 0; 987 988 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb); 989 990 if (IS_ERR(resp)) 991 return PTR_ERR(resp); 992 993 dev_kfree_skb(resp); 994 995 return 0; 996 } 997 998 static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf) 999 { 1000 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1001 struct sk_buff *skb; 1002 struct sk_buff *resp; 1003 int rc; 1004 1005 if (rf >= NFC_DIGITAL_RF_TECH_LAST) 1006 return -EINVAL; 1007 1008 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting)); 1009 if (!skb) 1010 return -ENOMEM; 1011 1012 memcpy(skb_put(skb, sizeof(struct port100_in_rf_setting)), 1013 &in_rf_settings[rf], 1014 sizeof(struct port100_in_rf_setting)); 1015 1016 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb); 1017 1018 if (IS_ERR(resp)) 1019 return PTR_ERR(resp); 1020 1021 rc = resp->data[0]; 1022 1023 dev_kfree_skb(resp); 1024 1025 return rc; 1026 } 1027 1028 static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param) 1029 { 1030 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1031 struct port100_protocol *protocols; 1032 struct sk_buff *skb; 1033 struct sk_buff *resp; 1034 int num_protocols; 1035 size_t size; 1036 int rc; 1037 1038 if (param >= NFC_DIGITAL_FRAMING_LAST) 1039 return -EINVAL; 1040 1041 protocols = in_protocols[param]; 1042 1043 num_protocols = 0; 1044 while (protocols[num_protocols].number != PORT100_IN_PROT_END) 1045 num_protocols++; 1046 1047 if (!num_protocols) 1048 return 0; 1049 1050 size = sizeof(struct port100_protocol) * num_protocols; 1051 1052 skb = port100_alloc_skb(dev, size); 1053 if (!skb) 1054 return -ENOMEM; 1055 1056 memcpy(skb_put(skb, size), protocols, size); 1057 1058 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb); 1059 1060 if (IS_ERR(resp)) 1061 return PTR_ERR(resp); 1062 1063 rc = resp->data[0]; 1064 1065 dev_kfree_skb(resp); 1066 1067 return rc; 1068 } 1069 1070 static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type, 1071 int param) 1072 { 1073 if (type == NFC_DIGITAL_CONFIG_RF_TECH) 1074 return port100_in_set_rf(ddev, param); 1075 1076 if (type == NFC_DIGITAL_CONFIG_FRAMING) 1077 return port100_in_set_framing(ddev, param); 1078 1079 return -EINVAL; 1080 } 1081 1082 static void port100_in_comm_rf_complete(struct port100 *dev, void *arg, 1083 struct sk_buff *resp) 1084 { 1085 struct port100_cb_arg *cb_arg = arg; 1086 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; 1087 u32 status; 1088 int rc; 1089 1090 if (IS_ERR(resp)) { 1091 rc = PTR_ERR(resp); 1092 goto exit; 1093 } 1094 1095 if (resp->len < 4) { 1096 nfc_err(&dev->interface->dev, 1097 "Invalid packet length received.\n"); 1098 rc = -EIO; 1099 goto error; 1100 } 1101 1102 status = le32_to_cpu(*(__le32 *)resp->data); 1103 1104 skb_pull(resp, sizeof(u32)); 1105 1106 if (status == PORT100_CMD_STATUS_TIMEOUT) { 1107 rc = -ETIMEDOUT; 1108 goto error; 1109 } 1110 1111 if (status != PORT100_CMD_STATUS_OK) { 1112 nfc_err(&dev->interface->dev, 1113 "in_comm_rf failed with status 0x%08x\n", status); 1114 rc = -EIO; 1115 goto error; 1116 } 1117 1118 /* Remove collision bits byte */ 1119 skb_pull(resp, 1); 1120 1121 goto exit; 1122 1123 error: 1124 kfree_skb(resp); 1125 resp = ERR_PTR(rc); 1126 1127 exit: 1128 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); 1129 1130 kfree(cb_arg); 1131 } 1132 1133 static int port100_in_send_cmd(struct nfc_digital_dev *ddev, 1134 struct sk_buff *skb, u16 _timeout, 1135 nfc_digital_cmd_complete_t cb, void *arg) 1136 { 1137 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1138 struct port100_cb_arg *cb_arg; 1139 __le16 timeout; 1140 1141 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1142 if (!cb_arg) 1143 return -ENOMEM; 1144 1145 cb_arg->complete_cb = cb; 1146 cb_arg->complete_arg = arg; 1147 1148 timeout = cpu_to_le16(_timeout * 10); 1149 1150 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16)); 1151 1152 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb, 1153 port100_in_comm_rf_complete, cb_arg); 1154 } 1155 1156 static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf) 1157 { 1158 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1159 struct sk_buff *skb; 1160 struct sk_buff *resp; 1161 int rc; 1162 1163 if (rf >= NFC_DIGITAL_RF_TECH_LAST) 1164 return -EINVAL; 1165 1166 skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting)); 1167 if (!skb) 1168 return -ENOMEM; 1169 1170 memcpy(skb_put(skb, sizeof(struct port100_tg_rf_setting)), 1171 &tg_rf_settings[rf], 1172 sizeof(struct port100_tg_rf_setting)); 1173 1174 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb); 1175 1176 if (IS_ERR(resp)) 1177 return PTR_ERR(resp); 1178 1179 rc = resp->data[0]; 1180 1181 dev_kfree_skb(resp); 1182 1183 return rc; 1184 } 1185 1186 static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param) 1187 { 1188 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1189 struct port100_protocol *protocols; 1190 struct sk_buff *skb; 1191 struct sk_buff *resp; 1192 int rc; 1193 int num_protocols; 1194 size_t size; 1195 1196 if (param >= NFC_DIGITAL_FRAMING_LAST) 1197 return -EINVAL; 1198 1199 protocols = tg_protocols[param]; 1200 1201 num_protocols = 0; 1202 while (protocols[num_protocols].number != PORT100_TG_PROT_END) 1203 num_protocols++; 1204 1205 if (!num_protocols) 1206 return 0; 1207 1208 size = sizeof(struct port100_protocol) * num_protocols; 1209 1210 skb = port100_alloc_skb(dev, size); 1211 if (!skb) 1212 return -ENOMEM; 1213 1214 memcpy(skb_put(skb, size), protocols, size); 1215 1216 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb); 1217 1218 if (IS_ERR(resp)) 1219 return PTR_ERR(resp); 1220 1221 rc = resp->data[0]; 1222 1223 dev_kfree_skb(resp); 1224 1225 return rc; 1226 } 1227 1228 static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type, 1229 int param) 1230 { 1231 if (type == NFC_DIGITAL_CONFIG_RF_TECH) 1232 return port100_tg_set_rf(ddev, param); 1233 1234 if (type == NFC_DIGITAL_CONFIG_FRAMING) 1235 return port100_tg_set_framing(ddev, param); 1236 1237 return -EINVAL; 1238 } 1239 1240 static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated) 1241 { 1242 u8 mask; 1243 1244 switch (dev->cmd_type) { 1245 case PORT100_CMD_TYPE_0: 1246 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK; 1247 break; 1248 case PORT100_CMD_TYPE_1: 1249 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK | 1250 PORT100_MDAA_TGT_WAS_ACTIVATED_MASK; 1251 break; 1252 default: 1253 nfc_err(&dev->interface->dev, "Unknonwn command type.\n"); 1254 return false; 1255 } 1256 1257 return ((tgt_activated & mask) == mask); 1258 } 1259 1260 static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg, 1261 struct sk_buff *resp) 1262 { 1263 u32 status; 1264 struct port100_cb_arg *cb_arg = arg; 1265 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; 1266 struct port100_tg_comm_rf_res *hdr; 1267 1268 if (IS_ERR(resp)) 1269 goto exit; 1270 1271 hdr = (struct port100_tg_comm_rf_res *)resp->data; 1272 1273 status = le32_to_cpu(hdr->status); 1274 1275 if (cb_arg->mdaa && 1276 !port100_tg_target_activated(dev, hdr->target_activated)) { 1277 kfree_skb(resp); 1278 resp = ERR_PTR(-ETIMEDOUT); 1279 1280 goto exit; 1281 } 1282 1283 skb_pull(resp, sizeof(struct port100_tg_comm_rf_res)); 1284 1285 if (status != PORT100_CMD_STATUS_OK) { 1286 kfree_skb(resp); 1287 1288 if (status == PORT100_CMD_STATUS_TIMEOUT) 1289 resp = ERR_PTR(-ETIMEDOUT); 1290 else 1291 resp = ERR_PTR(-EIO); 1292 } 1293 1294 exit: 1295 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); 1296 1297 kfree(cb_arg); 1298 } 1299 1300 static int port100_tg_send_cmd(struct nfc_digital_dev *ddev, 1301 struct sk_buff *skb, u16 timeout, 1302 nfc_digital_cmd_complete_t cb, void *arg) 1303 { 1304 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1305 struct port100_tg_comm_rf_cmd *hdr; 1306 struct port100_cb_arg *cb_arg; 1307 1308 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1309 if (!cb_arg) 1310 return -ENOMEM; 1311 1312 cb_arg->complete_cb = cb; 1313 cb_arg->complete_arg = arg; 1314 1315 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd)); 1316 1317 hdr = (struct port100_tg_comm_rf_cmd *)skb->data; 1318 1319 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd)); 1320 hdr->guard_time = cpu_to_le16(500); 1321 hdr->send_timeout = cpu_to_le16(0xFFFF); 1322 hdr->recv_timeout = cpu_to_le16(timeout); 1323 1324 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb, 1325 port100_tg_comm_rf_complete, cb_arg); 1326 } 1327 1328 static int port100_listen_mdaa(struct nfc_digital_dev *ddev, 1329 struct digital_tg_mdaa_params *params, 1330 u16 timeout, 1331 nfc_digital_cmd_complete_t cb, void *arg) 1332 { 1333 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1334 struct port100_tg_comm_rf_cmd *hdr; 1335 struct port100_cb_arg *cb_arg; 1336 struct sk_buff *skb; 1337 int rc; 1338 1339 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, 1340 NFC_DIGITAL_RF_TECH_106A); 1341 if (rc) 1342 return rc; 1343 1344 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, 1345 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); 1346 if (rc) 1347 return rc; 1348 1349 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1350 if (!cb_arg) 1351 return -ENOMEM; 1352 1353 cb_arg->complete_cb = cb; 1354 cb_arg->complete_arg = arg; 1355 cb_arg->mdaa = 1; 1356 1357 skb = port100_alloc_skb(dev, 0); 1358 if (!skb) { 1359 kfree(cb_arg); 1360 return -ENOMEM; 1361 } 1362 1363 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd)); 1364 hdr = (struct port100_tg_comm_rf_cmd *)skb->data; 1365 1366 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd)); 1367 1368 hdr->guard_time = 0; 1369 hdr->send_timeout = cpu_to_le16(0xFFFF); 1370 hdr->mdaa = 1; 1371 hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF; 1372 hdr->nfca_param[1] = params->sens_res & 0xFF; 1373 memcpy(hdr->nfca_param + 2, params->nfcid1, 3); 1374 hdr->nfca_param[5] = params->sel_res; 1375 memcpy(hdr->nfcf_param, params->nfcid2, 8); 1376 hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF; 1377 hdr->nfcf_param[17] = params->sc & 0xFF; 1378 hdr->recv_timeout = cpu_to_le16(timeout); 1379 1380 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb, 1381 port100_tg_comm_rf_complete, cb_arg); 1382 } 1383 1384 static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout, 1385 nfc_digital_cmd_complete_t cb, void *arg) 1386 { 1387 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1388 struct sk_buff *skb; 1389 1390 skb = port100_alloc_skb(dev, 0); 1391 if (!skb) 1392 return -ENOMEM; 1393 1394 return port100_tg_send_cmd(ddev, skb, timeout, cb, arg); 1395 } 1396 1397 static struct nfc_digital_ops port100_digital_ops = { 1398 .in_configure_hw = port100_in_configure_hw, 1399 .in_send_cmd = port100_in_send_cmd, 1400 1401 .tg_listen_mdaa = port100_listen_mdaa, 1402 .tg_listen = port100_listen, 1403 .tg_configure_hw = port100_tg_configure_hw, 1404 .tg_send_cmd = port100_tg_send_cmd, 1405 1406 .switch_rf = port100_switch_rf, 1407 .abort_cmd = port100_abort_cmd, 1408 }; 1409 1410 static const struct usb_device_id port100_table[] = { 1411 { USB_DEVICE(SONY_VENDOR_ID, RCS380_PRODUCT_ID), }, 1412 { } 1413 }; 1414 MODULE_DEVICE_TABLE(usb, port100_table); 1415 1416 static int port100_probe(struct usb_interface *interface, 1417 const struct usb_device_id *id) 1418 { 1419 struct port100 *dev; 1420 int rc; 1421 struct usb_host_interface *iface_desc; 1422 struct usb_endpoint_descriptor *endpoint; 1423 int in_endpoint; 1424 int out_endpoint; 1425 u16 fw_version; 1426 u64 cmd_type_mask; 1427 int i; 1428 1429 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL); 1430 if (!dev) 1431 return -ENOMEM; 1432 1433 dev->udev = usb_get_dev(interface_to_usbdev(interface)); 1434 dev->interface = interface; 1435 usb_set_intfdata(interface, dev); 1436 1437 in_endpoint = out_endpoint = 0; 1438 iface_desc = interface->cur_altsetting; 1439 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 1440 endpoint = &iface_desc->endpoint[i].desc; 1441 1442 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) 1443 in_endpoint = endpoint->bEndpointAddress; 1444 1445 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) 1446 out_endpoint = endpoint->bEndpointAddress; 1447 } 1448 1449 if (!in_endpoint || !out_endpoint) { 1450 nfc_err(&interface->dev, 1451 "Could not find bulk-in or bulk-out endpoint\n"); 1452 rc = -ENODEV; 1453 goto error; 1454 } 1455 1456 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL); 1457 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL); 1458 1459 if (!dev->in_urb || !dev->out_urb) { 1460 nfc_err(&interface->dev, "Could not allocate USB URBs\n"); 1461 rc = -ENOMEM; 1462 goto error; 1463 } 1464 1465 usb_fill_bulk_urb(dev->in_urb, dev->udev, 1466 usb_rcvbulkpipe(dev->udev, in_endpoint), 1467 NULL, 0, NULL, dev); 1468 usb_fill_bulk_urb(dev->out_urb, dev->udev, 1469 usb_sndbulkpipe(dev->udev, out_endpoint), 1470 NULL, 0, port100_send_complete, dev); 1471 1472 dev->skb_headroom = PORT100_FRAME_HEADER_LEN + 1473 PORT100_COMM_RF_HEAD_MAX_LEN; 1474 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN; 1475 1476 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete); 1477 1478 /* The first thing to do with the Port-100 is to set the command type 1479 * to be used. If supported we use command type 1. 0 otherwise. 1480 */ 1481 cmd_type_mask = port100_get_command_type_mask(dev); 1482 if (!cmd_type_mask) { 1483 nfc_err(&interface->dev, 1484 "Could not get supported command types.\n"); 1485 rc = -ENODEV; 1486 goto error; 1487 } 1488 1489 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1)) 1490 dev->cmd_type = PORT100_CMD_TYPE_1; 1491 else 1492 dev->cmd_type = PORT100_CMD_TYPE_0; 1493 1494 rc = port100_set_command_type(dev, dev->cmd_type); 1495 if (rc) { 1496 nfc_err(&interface->dev, 1497 "The device does not support command type %u.\n", 1498 dev->cmd_type); 1499 goto error; 1500 } 1501 1502 fw_version = port100_get_firmware_version(dev); 1503 if (!fw_version) 1504 nfc_err(&interface->dev, 1505 "Could not get device firmware version.\n"); 1506 1507 nfc_info(&interface->dev, 1508 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n", 1509 (fw_version & 0xFF00) >> 8, fw_version & 0xFF); 1510 1511 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops, 1512 PORT100_PROTOCOLS, 1513 PORT100_CAPABILITIES, 1514 dev->skb_headroom, 1515 dev->skb_tailroom); 1516 if (!dev->nfc_digital_dev) { 1517 nfc_err(&interface->dev, 1518 "Could not allocate nfc_digital_dev.\n"); 1519 rc = -ENOMEM; 1520 goto error; 1521 } 1522 1523 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev); 1524 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev); 1525 1526 rc = nfc_digital_register_device(dev->nfc_digital_dev); 1527 if (rc) { 1528 nfc_err(&interface->dev, 1529 "Could not register digital device.\n"); 1530 goto free_nfc_dev; 1531 } 1532 1533 return 0; 1534 1535 free_nfc_dev: 1536 nfc_digital_free_device(dev->nfc_digital_dev); 1537 1538 error: 1539 usb_free_urb(dev->in_urb); 1540 usb_free_urb(dev->out_urb); 1541 usb_put_dev(dev->udev); 1542 1543 return rc; 1544 } 1545 1546 static void port100_disconnect(struct usb_interface *interface) 1547 { 1548 struct port100 *dev; 1549 1550 dev = usb_get_intfdata(interface); 1551 usb_set_intfdata(interface, NULL); 1552 1553 nfc_digital_unregister_device(dev->nfc_digital_dev); 1554 nfc_digital_free_device(dev->nfc_digital_dev); 1555 1556 usb_kill_urb(dev->in_urb); 1557 usb_kill_urb(dev->out_urb); 1558 1559 usb_free_urb(dev->in_urb); 1560 usb_free_urb(dev->out_urb); 1561 usb_put_dev(dev->udev); 1562 1563 kfree(dev->cmd); 1564 1565 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected"); 1566 } 1567 1568 static struct usb_driver port100_driver = { 1569 .name = "port100", 1570 .probe = port100_probe, 1571 .disconnect = port100_disconnect, 1572 .id_table = port100_table, 1573 }; 1574 1575 module_usb_driver(port100_driver); 1576 1577 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION); 1578 MODULE_VERSION(VERSION); 1579 MODULE_LICENSE("GPL"); 1580