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_INITIAL_GUARD_TIME, 18 }, 347 { PORT100_IN_PROT_ADD_CRC, 1 }, 348 { PORT100_IN_PROT_CHECK_CRC, 1 }, 349 { PORT100_IN_PROT_MULTI_CARD, 0 }, 350 { PORT100_IN_PROT_ADD_PARITY, 0 }, 351 { PORT100_IN_PROT_CHECK_PARITY, 0 }, 352 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 353 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 354 { PORT100_IN_PROT_CRYPTO1, 0 }, 355 { PORT100_IN_PROT_ADD_SOF, 0 }, 356 { PORT100_IN_PROT_CHECK_SOF, 0 }, 357 { PORT100_IN_PROT_ADD_EOF, 0 }, 358 { PORT100_IN_PROT_CHECK_EOF, 0 }, 359 { PORT100_IN_PROT_DEAF_TIME, 4 }, 360 { PORT100_IN_PROT_CRM, 0 }, 361 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 362 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 363 { PORT100_IN_PROT_RFCA, 0 }, 364 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 365 { PORT100_IN_PROT_END, 0 }, 366 }, 367 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = { 368 { PORT100_IN_PROT_END, 0 }, 369 }, 370 [NFC_DIGITAL_FRAMING_NFCB] = { 371 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 20 }, 372 { PORT100_IN_PROT_ADD_CRC, 1 }, 373 { PORT100_IN_PROT_CHECK_CRC, 1 }, 374 { PORT100_IN_PROT_MULTI_CARD, 0 }, 375 { PORT100_IN_PROT_ADD_PARITY, 0 }, 376 { PORT100_IN_PROT_CHECK_PARITY, 0 }, 377 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 378 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 379 { PORT100_IN_PROT_CRYPTO1, 0 }, 380 { PORT100_IN_PROT_ADD_SOF, 1 }, 381 { PORT100_IN_PROT_CHECK_SOF, 1 }, 382 { PORT100_IN_PROT_ADD_EOF, 1 }, 383 { PORT100_IN_PROT_CHECK_EOF, 1 }, 384 { PORT100_IN_PROT_DEAF_TIME, 4 }, 385 { PORT100_IN_PROT_CRM, 0 }, 386 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 387 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 388 { PORT100_IN_PROT_RFCA, 0 }, 389 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 390 { PORT100_IN_PROT_END, 0 }, 391 }, 392 [NFC_DIGITAL_FRAMING_NFCB_T4T] = { 393 /* nfc_digital_framing_nfcb */ 394 { PORT100_IN_PROT_END, 0 }, 395 }, 396 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */ 397 [NFC_DIGITAL_FRAMING_LAST] = { 398 { PORT100_IN_PROT_END, 0 }, 399 }, 400 }; 401 402 static struct port100_protocol 403 tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = { 404 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = { 405 { PORT100_TG_PROT_END, 0 }, 406 }, 407 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = { 408 { PORT100_TG_PROT_END, 0 }, 409 }, 410 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = { 411 { PORT100_TG_PROT_END, 0 }, 412 }, 413 [NFC_DIGITAL_FRAMING_NFCA_T1T] = { 414 { PORT100_TG_PROT_END, 0 }, 415 }, 416 [NFC_DIGITAL_FRAMING_NFCA_T2T] = { 417 { PORT100_TG_PROT_END, 0 }, 418 }, 419 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = { 420 { PORT100_TG_PROT_TU, 1 }, 421 { PORT100_TG_PROT_RF_OFF, 0 }, 422 { PORT100_TG_PROT_CRM, 7 }, 423 { PORT100_TG_PROT_END, 0 }, 424 }, 425 [NFC_DIGITAL_FRAMING_NFCF] = { 426 { PORT100_TG_PROT_END, 0 }, 427 }, 428 [NFC_DIGITAL_FRAMING_NFCF_T3T] = { 429 { PORT100_TG_PROT_END, 0 }, 430 }, 431 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = { 432 { PORT100_TG_PROT_TU, 1 }, 433 { PORT100_TG_PROT_RF_OFF, 0 }, 434 { PORT100_TG_PROT_CRM, 7 }, 435 { PORT100_TG_PROT_END, 0 }, 436 }, 437 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = { 438 { PORT100_TG_PROT_RF_OFF, 1 }, 439 { PORT100_TG_PROT_END, 0 }, 440 }, 441 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */ 442 [NFC_DIGITAL_FRAMING_LAST] = { 443 { PORT100_TG_PROT_END, 0 }, 444 }, 445 }; 446 447 struct port100 { 448 struct nfc_digital_dev *nfc_digital_dev; 449 450 int skb_headroom; 451 int skb_tailroom; 452 453 struct usb_device *udev; 454 struct usb_interface *interface; 455 456 struct urb *out_urb; 457 struct urb *in_urb; 458 459 /* This mutex protects the out_urb and avoids to submit a new command 460 * through port100_send_frame_async() while the previous one is being 461 * canceled through port100_abort_cmd(). 462 */ 463 struct mutex out_urb_lock; 464 465 struct work_struct cmd_complete_work; 466 467 u8 cmd_type; 468 469 /* The digital stack serializes commands to be sent. There is no need 470 * for any queuing/locking mechanism at driver level. 471 */ 472 struct port100_cmd *cmd; 473 474 bool cmd_cancel; 475 struct completion cmd_cancel_done; 476 }; 477 478 struct port100_cmd { 479 u8 code; 480 int status; 481 struct sk_buff *req; 482 struct sk_buff *resp; 483 int resp_len; 484 port100_send_async_complete_t complete_cb; 485 void *complete_cb_context; 486 }; 487 488 struct port100_frame { 489 u8 preamble; 490 __be16 start_frame; 491 __be16 extended_frame; 492 __le16 datalen; 493 u8 datalen_checksum; 494 u8 data[]; 495 } __packed; 496 497 struct port100_ack_frame { 498 u8 preamble; 499 __be16 start_frame; 500 __be16 ack_frame; 501 u8 postambule; 502 } __packed; 503 504 struct port100_cb_arg { 505 nfc_digital_cmd_complete_t complete_cb; 506 void *complete_arg; 507 u8 mdaa; 508 }; 509 510 struct port100_tg_comm_rf_cmd { 511 __le16 guard_time; 512 __le16 send_timeout; 513 u8 mdaa; 514 u8 nfca_param[6]; 515 u8 nfcf_param[18]; 516 u8 mf_halted; 517 u8 arae_flag; 518 __le16 recv_timeout; 519 u8 data[]; 520 } __packed; 521 522 struct port100_tg_comm_rf_res { 523 u8 comm_type; 524 u8 ar_status; 525 u8 target_activated; 526 __le32 status; 527 u8 data[]; 528 } __packed; 529 530 /* The rule: value + checksum = 0 */ 531 static inline u8 port100_checksum(u16 value) 532 { 533 return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1; 534 } 535 536 /* The rule: sum(data elements) + checksum = 0 */ 537 static u8 port100_data_checksum(u8 *data, int datalen) 538 { 539 u8 sum = 0; 540 int i; 541 542 for (i = 0; i < datalen; i++) 543 sum += data[i]; 544 545 return port100_checksum(sum); 546 } 547 548 static void port100_tx_frame_init(void *_frame, u8 cmd_code) 549 { 550 struct port100_frame *frame = _frame; 551 552 frame->preamble = 0; 553 frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF); 554 frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT); 555 PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT; 556 PORT100_FRAME_CMD(frame) = cmd_code; 557 frame->datalen = cpu_to_le16(2); 558 } 559 560 static void port100_tx_frame_finish(void *_frame) 561 { 562 struct port100_frame *frame = _frame; 563 564 frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen)); 565 566 PORT100_FRAME_CHECKSUM(frame) = 567 port100_data_checksum(frame->data, le16_to_cpu(frame->datalen)); 568 569 PORT100_FRAME_POSTAMBLE(frame) = 0; 570 } 571 572 static void port100_tx_update_payload_len(void *_frame, int len) 573 { 574 struct port100_frame *frame = _frame; 575 576 frame->datalen = cpu_to_le16(le16_to_cpu(frame->datalen) + len); 577 } 578 579 static bool port100_rx_frame_is_valid(void *_frame) 580 { 581 u8 checksum; 582 struct port100_frame *frame = _frame; 583 584 if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) || 585 frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT)) 586 return false; 587 588 checksum = port100_checksum(le16_to_cpu(frame->datalen)); 589 if (checksum != frame->datalen_checksum) 590 return false; 591 592 checksum = port100_data_checksum(frame->data, 593 le16_to_cpu(frame->datalen)); 594 if (checksum != PORT100_FRAME_CHECKSUM(frame)) 595 return false; 596 597 return true; 598 } 599 600 static bool port100_rx_frame_is_ack(struct port100_ack_frame *frame) 601 { 602 return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) && 603 frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK)); 604 } 605 606 static inline int port100_rx_frame_size(void *frame) 607 { 608 struct port100_frame *f = frame; 609 610 return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) + 611 PORT100_FRAME_TAIL_LEN; 612 } 613 614 static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame) 615 { 616 struct port100_frame *f = frame; 617 618 return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code)); 619 } 620 621 static void port100_recv_response(struct urb *urb) 622 { 623 struct port100 *dev = urb->context; 624 struct port100_cmd *cmd = dev->cmd; 625 u8 *in_frame; 626 627 cmd->status = urb->status; 628 629 switch (urb->status) { 630 case 0: 631 break; /* success */ 632 case -ECONNRESET: 633 case -ENOENT: 634 nfc_err(&dev->interface->dev, 635 "The urb has been canceled (status %d)\n", urb->status); 636 goto sched_wq; 637 case -ESHUTDOWN: 638 default: 639 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 640 urb->status); 641 goto sched_wq; 642 } 643 644 in_frame = dev->in_urb->transfer_buffer; 645 646 if (!port100_rx_frame_is_valid(in_frame)) { 647 nfc_err(&dev->interface->dev, "Received an invalid frame\n"); 648 cmd->status = -EIO; 649 goto sched_wq; 650 } 651 652 print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame, 653 port100_rx_frame_size(in_frame), false); 654 655 if (!port100_rx_frame_is_cmd_response(dev, in_frame)) { 656 nfc_err(&dev->interface->dev, 657 "It's not the response to the last command\n"); 658 cmd->status = -EIO; 659 goto sched_wq; 660 } 661 662 sched_wq: 663 schedule_work(&dev->cmd_complete_work); 664 } 665 666 static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags) 667 { 668 dev->in_urb->complete = port100_recv_response; 669 670 return usb_submit_urb(dev->in_urb, flags); 671 } 672 673 static void port100_recv_ack(struct urb *urb) 674 { 675 struct port100 *dev = urb->context; 676 struct port100_cmd *cmd = dev->cmd; 677 struct port100_ack_frame *in_frame; 678 int rc; 679 680 cmd->status = urb->status; 681 682 switch (urb->status) { 683 case 0: 684 break; /* success */ 685 case -ECONNRESET: 686 case -ENOENT: 687 nfc_err(&dev->interface->dev, 688 "The urb has been stopped (status %d)\n", urb->status); 689 goto sched_wq; 690 case -ESHUTDOWN: 691 default: 692 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 693 urb->status); 694 goto sched_wq; 695 } 696 697 in_frame = dev->in_urb->transfer_buffer; 698 699 if (!port100_rx_frame_is_ack(in_frame)) { 700 nfc_err(&dev->interface->dev, "Received an invalid ack\n"); 701 cmd->status = -EIO; 702 goto sched_wq; 703 } 704 705 rc = port100_submit_urb_for_response(dev, GFP_ATOMIC); 706 if (rc) { 707 nfc_err(&dev->interface->dev, 708 "usb_submit_urb failed with result %d\n", rc); 709 cmd->status = rc; 710 goto sched_wq; 711 } 712 713 return; 714 715 sched_wq: 716 schedule_work(&dev->cmd_complete_work); 717 } 718 719 static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags) 720 { 721 dev->in_urb->complete = port100_recv_ack; 722 723 return usb_submit_urb(dev->in_urb, flags); 724 } 725 726 static int port100_send_ack(struct port100 *dev) 727 { 728 int rc; 729 730 mutex_lock(&dev->out_urb_lock); 731 732 init_completion(&dev->cmd_cancel_done); 733 734 usb_kill_urb(dev->out_urb); 735 736 dev->out_urb->transfer_buffer = ack_frame; 737 dev->out_urb->transfer_buffer_length = sizeof(ack_frame); 738 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL); 739 740 /* Set the cmd_cancel flag only if the URB has been successfully 741 * submitted. It will be reset by the out URB completion callback 742 * port100_send_complete(). 743 */ 744 dev->cmd_cancel = !rc; 745 746 mutex_unlock(&dev->out_urb_lock); 747 748 if (!rc) 749 wait_for_completion(&dev->cmd_cancel_done); 750 751 return rc; 752 } 753 754 static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out, 755 struct sk_buff *in, int in_len) 756 { 757 int rc; 758 759 mutex_lock(&dev->out_urb_lock); 760 761 /* A command cancel frame as been sent through dev->out_urb. Don't try 762 * to submit a new one. 763 */ 764 if (dev->cmd_cancel) { 765 rc = -EAGAIN; 766 goto exit; 767 } 768 769 dev->out_urb->transfer_buffer = out->data; 770 dev->out_urb->transfer_buffer_length = out->len; 771 772 dev->in_urb->transfer_buffer = in->data; 773 dev->in_urb->transfer_buffer_length = in_len; 774 775 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1, 776 out->data, out->len, false); 777 778 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL); 779 if (rc) 780 goto exit; 781 782 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL); 783 if (rc) 784 usb_unlink_urb(dev->out_urb); 785 786 exit: 787 mutex_unlock(&dev->out_urb_lock); 788 789 return rc; 790 } 791 792 static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code, 793 struct sk_buff *skb) 794 { 795 /* payload is already there, just update datalen */ 796 int payload_len = skb->len; 797 798 skb_push(skb, PORT100_FRAME_HEADER_LEN); 799 skb_put(skb, PORT100_FRAME_TAIL_LEN); 800 801 port100_tx_frame_init(skb->data, cmd_code); 802 port100_tx_update_payload_len(skb->data, payload_len); 803 port100_tx_frame_finish(skb->data); 804 } 805 806 static void port100_send_async_complete(struct port100 *dev) 807 { 808 struct port100_cmd *cmd = dev->cmd; 809 int status = cmd->status; 810 811 struct sk_buff *req = cmd->req; 812 struct sk_buff *resp = cmd->resp; 813 814 dev_kfree_skb(req); 815 816 dev->cmd = NULL; 817 818 if (status < 0) { 819 cmd->complete_cb(dev, cmd->complete_cb_context, 820 ERR_PTR(status)); 821 dev_kfree_skb(resp); 822 goto done; 823 } 824 825 skb_put(resp, port100_rx_frame_size(resp->data)); 826 skb_pull(resp, PORT100_FRAME_HEADER_LEN); 827 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN); 828 829 cmd->complete_cb(dev, cmd->complete_cb_context, resp); 830 831 done: 832 kfree(cmd); 833 } 834 835 static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code, 836 struct sk_buff *req, 837 port100_send_async_complete_t complete_cb, 838 void *complete_cb_context) 839 { 840 struct port100_cmd *cmd; 841 struct sk_buff *resp; 842 int rc; 843 int resp_len = PORT100_FRAME_HEADER_LEN + 844 PORT100_FRAME_MAX_PAYLOAD_LEN + 845 PORT100_FRAME_TAIL_LEN; 846 847 if (dev->cmd) { 848 nfc_err(&dev->interface->dev, 849 "A command is still in process\n"); 850 return -EBUSY; 851 } 852 853 resp = alloc_skb(resp_len, GFP_KERNEL); 854 if (!resp) 855 return -ENOMEM; 856 857 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 858 if (!cmd) { 859 dev_kfree_skb(resp); 860 return -ENOMEM; 861 } 862 863 cmd->code = cmd_code; 864 cmd->req = req; 865 cmd->resp = resp; 866 cmd->resp_len = resp_len; 867 cmd->complete_cb = complete_cb; 868 cmd->complete_cb_context = complete_cb_context; 869 870 port100_build_cmd_frame(dev, cmd_code, req); 871 872 dev->cmd = cmd; 873 874 rc = port100_send_frame_async(dev, req, resp, resp_len); 875 if (rc) { 876 kfree(cmd); 877 dev_kfree_skb(resp); 878 dev->cmd = NULL; 879 } 880 881 return rc; 882 } 883 884 struct port100_sync_cmd_response { 885 struct sk_buff *resp; 886 struct completion done; 887 }; 888 889 static void port100_wq_cmd_complete(struct work_struct *work) 890 { 891 struct port100 *dev = container_of(work, struct port100, 892 cmd_complete_work); 893 894 port100_send_async_complete(dev); 895 } 896 897 static void port100_send_sync_complete(struct port100 *dev, void *_arg, 898 struct sk_buff *resp) 899 { 900 struct port100_sync_cmd_response *arg = _arg; 901 902 arg->resp = resp; 903 complete(&arg->done); 904 } 905 906 static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code, 907 struct sk_buff *req) 908 { 909 int rc; 910 struct port100_sync_cmd_response arg; 911 912 init_completion(&arg.done); 913 914 rc = port100_send_cmd_async(dev, cmd_code, req, 915 port100_send_sync_complete, &arg); 916 if (rc) { 917 dev_kfree_skb(req); 918 return ERR_PTR(rc); 919 } 920 921 wait_for_completion(&arg.done); 922 923 return arg.resp; 924 } 925 926 static void port100_send_complete(struct urb *urb) 927 { 928 struct port100 *dev = urb->context; 929 930 if (dev->cmd_cancel) { 931 dev->cmd_cancel = false; 932 complete(&dev->cmd_cancel_done); 933 } 934 935 switch (urb->status) { 936 case 0: 937 break; /* success */ 938 case -ECONNRESET: 939 case -ENOENT: 940 nfc_err(&dev->interface->dev, 941 "The urb has been stopped (status %d)\n", urb->status); 942 break; 943 case -ESHUTDOWN: 944 default: 945 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 946 urb->status); 947 } 948 } 949 950 static void port100_abort_cmd(struct nfc_digital_dev *ddev) 951 { 952 struct port100 *dev = nfc_digital_get_drvdata(ddev); 953 954 /* An ack will cancel the last issued command */ 955 port100_send_ack(dev); 956 957 /* cancel the urb request */ 958 usb_kill_urb(dev->in_urb); 959 } 960 961 static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size) 962 { 963 struct sk_buff *skb; 964 965 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size, 966 GFP_KERNEL); 967 if (skb) 968 skb_reserve(skb, dev->skb_headroom); 969 970 return skb; 971 } 972 973 static int port100_set_command_type(struct port100 *dev, u8 command_type) 974 { 975 struct sk_buff *skb; 976 struct sk_buff *resp; 977 int rc; 978 979 skb = port100_alloc_skb(dev, 1); 980 if (!skb) 981 return -ENOMEM; 982 983 *skb_put(skb, sizeof(u8)) = command_type; 984 985 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb); 986 if (IS_ERR(resp)) 987 return PTR_ERR(resp); 988 989 rc = resp->data[0]; 990 991 dev_kfree_skb(resp); 992 993 return rc; 994 } 995 996 static u64 port100_get_command_type_mask(struct port100 *dev) 997 { 998 struct sk_buff *skb; 999 struct sk_buff *resp; 1000 u64 mask; 1001 1002 skb = port100_alloc_skb(dev, 0); 1003 if (!skb) 1004 return -ENOMEM; 1005 1006 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb); 1007 if (IS_ERR(resp)) 1008 return PTR_ERR(resp); 1009 1010 if (resp->len < 8) 1011 mask = 0; 1012 else 1013 mask = be64_to_cpu(*(__be64 *)resp->data); 1014 1015 dev_kfree_skb(resp); 1016 1017 return mask; 1018 } 1019 1020 static u16 port100_get_firmware_version(struct port100 *dev) 1021 { 1022 struct sk_buff *skb; 1023 struct sk_buff *resp; 1024 u16 fw_ver; 1025 1026 skb = port100_alloc_skb(dev, 0); 1027 if (!skb) 1028 return 0; 1029 1030 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION, 1031 skb); 1032 if (IS_ERR(resp)) 1033 return 0; 1034 1035 fw_ver = le16_to_cpu(*(__le16 *)resp->data); 1036 1037 dev_kfree_skb(resp); 1038 1039 return fw_ver; 1040 } 1041 1042 static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on) 1043 { 1044 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1045 struct sk_buff *skb, *resp; 1046 1047 skb = port100_alloc_skb(dev, 1); 1048 if (!skb) 1049 return -ENOMEM; 1050 1051 *skb_put(skb, 1) = on ? 1 : 0; 1052 1053 /* Cancel the last command if the device is being switched off */ 1054 if (!on) 1055 port100_abort_cmd(ddev); 1056 1057 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb); 1058 1059 if (IS_ERR(resp)) 1060 return PTR_ERR(resp); 1061 1062 dev_kfree_skb(resp); 1063 1064 return 0; 1065 } 1066 1067 static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf) 1068 { 1069 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1070 struct sk_buff *skb; 1071 struct sk_buff *resp; 1072 int rc; 1073 1074 if (rf >= NFC_DIGITAL_RF_TECH_LAST) 1075 return -EINVAL; 1076 1077 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting)); 1078 if (!skb) 1079 return -ENOMEM; 1080 1081 memcpy(skb_put(skb, sizeof(struct port100_in_rf_setting)), 1082 &in_rf_settings[rf], 1083 sizeof(struct port100_in_rf_setting)); 1084 1085 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb); 1086 1087 if (IS_ERR(resp)) 1088 return PTR_ERR(resp); 1089 1090 rc = resp->data[0]; 1091 1092 dev_kfree_skb(resp); 1093 1094 return rc; 1095 } 1096 1097 static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param) 1098 { 1099 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1100 struct port100_protocol *protocols; 1101 struct sk_buff *skb; 1102 struct sk_buff *resp; 1103 int num_protocols; 1104 size_t size; 1105 int rc; 1106 1107 if (param >= NFC_DIGITAL_FRAMING_LAST) 1108 return -EINVAL; 1109 1110 protocols = in_protocols[param]; 1111 1112 num_protocols = 0; 1113 while (protocols[num_protocols].number != PORT100_IN_PROT_END) 1114 num_protocols++; 1115 1116 if (!num_protocols) 1117 return 0; 1118 1119 size = sizeof(struct port100_protocol) * num_protocols; 1120 1121 skb = port100_alloc_skb(dev, size); 1122 if (!skb) 1123 return -ENOMEM; 1124 1125 memcpy(skb_put(skb, size), protocols, size); 1126 1127 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb); 1128 1129 if (IS_ERR(resp)) 1130 return PTR_ERR(resp); 1131 1132 rc = resp->data[0]; 1133 1134 dev_kfree_skb(resp); 1135 1136 return rc; 1137 } 1138 1139 static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type, 1140 int param) 1141 { 1142 if (type == NFC_DIGITAL_CONFIG_RF_TECH) 1143 return port100_in_set_rf(ddev, param); 1144 1145 if (type == NFC_DIGITAL_CONFIG_FRAMING) 1146 return port100_in_set_framing(ddev, param); 1147 1148 return -EINVAL; 1149 } 1150 1151 static void port100_in_comm_rf_complete(struct port100 *dev, void *arg, 1152 struct sk_buff *resp) 1153 { 1154 struct port100_cb_arg *cb_arg = arg; 1155 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; 1156 u32 status; 1157 int rc; 1158 1159 if (IS_ERR(resp)) { 1160 rc = PTR_ERR(resp); 1161 goto exit; 1162 } 1163 1164 if (resp->len < 4) { 1165 nfc_err(&dev->interface->dev, 1166 "Invalid packet length received\n"); 1167 rc = -EIO; 1168 goto error; 1169 } 1170 1171 status = le32_to_cpu(*(__le32 *)resp->data); 1172 1173 skb_pull(resp, sizeof(u32)); 1174 1175 if (status == PORT100_CMD_STATUS_TIMEOUT) { 1176 rc = -ETIMEDOUT; 1177 goto error; 1178 } 1179 1180 if (status != PORT100_CMD_STATUS_OK) { 1181 nfc_err(&dev->interface->dev, 1182 "in_comm_rf failed with status 0x%08x\n", status); 1183 rc = -EIO; 1184 goto error; 1185 } 1186 1187 /* Remove collision bits byte */ 1188 skb_pull(resp, 1); 1189 1190 goto exit; 1191 1192 error: 1193 kfree_skb(resp); 1194 resp = ERR_PTR(rc); 1195 1196 exit: 1197 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); 1198 1199 kfree(cb_arg); 1200 } 1201 1202 static int port100_in_send_cmd(struct nfc_digital_dev *ddev, 1203 struct sk_buff *skb, u16 _timeout, 1204 nfc_digital_cmd_complete_t cb, void *arg) 1205 { 1206 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1207 struct port100_cb_arg *cb_arg; 1208 __le16 timeout; 1209 1210 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1211 if (!cb_arg) 1212 return -ENOMEM; 1213 1214 cb_arg->complete_cb = cb; 1215 cb_arg->complete_arg = arg; 1216 1217 timeout = cpu_to_le16(_timeout * 10); 1218 1219 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16)); 1220 1221 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb, 1222 port100_in_comm_rf_complete, cb_arg); 1223 } 1224 1225 static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf) 1226 { 1227 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1228 struct sk_buff *skb; 1229 struct sk_buff *resp; 1230 int rc; 1231 1232 if (rf >= NFC_DIGITAL_RF_TECH_LAST) 1233 return -EINVAL; 1234 1235 skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting)); 1236 if (!skb) 1237 return -ENOMEM; 1238 1239 memcpy(skb_put(skb, sizeof(struct port100_tg_rf_setting)), 1240 &tg_rf_settings[rf], 1241 sizeof(struct port100_tg_rf_setting)); 1242 1243 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb); 1244 1245 if (IS_ERR(resp)) 1246 return PTR_ERR(resp); 1247 1248 rc = resp->data[0]; 1249 1250 dev_kfree_skb(resp); 1251 1252 return rc; 1253 } 1254 1255 static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param) 1256 { 1257 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1258 struct port100_protocol *protocols; 1259 struct sk_buff *skb; 1260 struct sk_buff *resp; 1261 int rc; 1262 int num_protocols; 1263 size_t size; 1264 1265 if (param >= NFC_DIGITAL_FRAMING_LAST) 1266 return -EINVAL; 1267 1268 protocols = tg_protocols[param]; 1269 1270 num_protocols = 0; 1271 while (protocols[num_protocols].number != PORT100_TG_PROT_END) 1272 num_protocols++; 1273 1274 if (!num_protocols) 1275 return 0; 1276 1277 size = sizeof(struct port100_protocol) * num_protocols; 1278 1279 skb = port100_alloc_skb(dev, size); 1280 if (!skb) 1281 return -ENOMEM; 1282 1283 memcpy(skb_put(skb, size), protocols, size); 1284 1285 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb); 1286 1287 if (IS_ERR(resp)) 1288 return PTR_ERR(resp); 1289 1290 rc = resp->data[0]; 1291 1292 dev_kfree_skb(resp); 1293 1294 return rc; 1295 } 1296 1297 static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type, 1298 int param) 1299 { 1300 if (type == NFC_DIGITAL_CONFIG_RF_TECH) 1301 return port100_tg_set_rf(ddev, param); 1302 1303 if (type == NFC_DIGITAL_CONFIG_FRAMING) 1304 return port100_tg_set_framing(ddev, param); 1305 1306 return -EINVAL; 1307 } 1308 1309 static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated) 1310 { 1311 u8 mask; 1312 1313 switch (dev->cmd_type) { 1314 case PORT100_CMD_TYPE_0: 1315 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK; 1316 break; 1317 case PORT100_CMD_TYPE_1: 1318 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK | 1319 PORT100_MDAA_TGT_WAS_ACTIVATED_MASK; 1320 break; 1321 default: 1322 nfc_err(&dev->interface->dev, "Unknown command type\n"); 1323 return false; 1324 } 1325 1326 return ((tgt_activated & mask) == mask); 1327 } 1328 1329 static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg, 1330 struct sk_buff *resp) 1331 { 1332 u32 status; 1333 struct port100_cb_arg *cb_arg = arg; 1334 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; 1335 struct port100_tg_comm_rf_res *hdr; 1336 1337 if (IS_ERR(resp)) 1338 goto exit; 1339 1340 hdr = (struct port100_tg_comm_rf_res *)resp->data; 1341 1342 status = le32_to_cpu(hdr->status); 1343 1344 if (cb_arg->mdaa && 1345 !port100_tg_target_activated(dev, hdr->target_activated)) { 1346 kfree_skb(resp); 1347 resp = ERR_PTR(-ETIMEDOUT); 1348 1349 goto exit; 1350 } 1351 1352 skb_pull(resp, sizeof(struct port100_tg_comm_rf_res)); 1353 1354 if (status != PORT100_CMD_STATUS_OK) { 1355 kfree_skb(resp); 1356 1357 if (status == PORT100_CMD_STATUS_TIMEOUT) 1358 resp = ERR_PTR(-ETIMEDOUT); 1359 else 1360 resp = ERR_PTR(-EIO); 1361 } 1362 1363 exit: 1364 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); 1365 1366 kfree(cb_arg); 1367 } 1368 1369 static int port100_tg_send_cmd(struct nfc_digital_dev *ddev, 1370 struct sk_buff *skb, u16 timeout, 1371 nfc_digital_cmd_complete_t cb, void *arg) 1372 { 1373 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1374 struct port100_tg_comm_rf_cmd *hdr; 1375 struct port100_cb_arg *cb_arg; 1376 1377 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1378 if (!cb_arg) 1379 return -ENOMEM; 1380 1381 cb_arg->complete_cb = cb; 1382 cb_arg->complete_arg = arg; 1383 1384 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd)); 1385 1386 hdr = (struct port100_tg_comm_rf_cmd *)skb->data; 1387 1388 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd)); 1389 hdr->guard_time = cpu_to_le16(500); 1390 hdr->send_timeout = cpu_to_le16(0xFFFF); 1391 hdr->recv_timeout = cpu_to_le16(timeout); 1392 1393 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb, 1394 port100_tg_comm_rf_complete, cb_arg); 1395 } 1396 1397 static int port100_listen_mdaa(struct nfc_digital_dev *ddev, 1398 struct digital_tg_mdaa_params *params, 1399 u16 timeout, 1400 nfc_digital_cmd_complete_t cb, void *arg) 1401 { 1402 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1403 struct port100_tg_comm_rf_cmd *hdr; 1404 struct port100_cb_arg *cb_arg; 1405 struct sk_buff *skb; 1406 int rc; 1407 1408 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, 1409 NFC_DIGITAL_RF_TECH_106A); 1410 if (rc) 1411 return rc; 1412 1413 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, 1414 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); 1415 if (rc) 1416 return rc; 1417 1418 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1419 if (!cb_arg) 1420 return -ENOMEM; 1421 1422 cb_arg->complete_cb = cb; 1423 cb_arg->complete_arg = arg; 1424 cb_arg->mdaa = 1; 1425 1426 skb = port100_alloc_skb(dev, 0); 1427 if (!skb) { 1428 kfree(cb_arg); 1429 return -ENOMEM; 1430 } 1431 1432 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd)); 1433 hdr = (struct port100_tg_comm_rf_cmd *)skb->data; 1434 1435 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd)); 1436 1437 hdr->guard_time = 0; 1438 hdr->send_timeout = cpu_to_le16(0xFFFF); 1439 hdr->mdaa = 1; 1440 hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF; 1441 hdr->nfca_param[1] = params->sens_res & 0xFF; 1442 memcpy(hdr->nfca_param + 2, params->nfcid1, 3); 1443 hdr->nfca_param[5] = params->sel_res; 1444 memcpy(hdr->nfcf_param, params->nfcid2, 8); 1445 hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF; 1446 hdr->nfcf_param[17] = params->sc & 0xFF; 1447 hdr->recv_timeout = cpu_to_le16(timeout); 1448 1449 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb, 1450 port100_tg_comm_rf_complete, cb_arg); 1451 } 1452 1453 static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout, 1454 nfc_digital_cmd_complete_t cb, void *arg) 1455 { 1456 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1457 struct sk_buff *skb; 1458 1459 skb = port100_alloc_skb(dev, 0); 1460 if (!skb) 1461 return -ENOMEM; 1462 1463 return port100_tg_send_cmd(ddev, skb, timeout, cb, arg); 1464 } 1465 1466 static struct nfc_digital_ops port100_digital_ops = { 1467 .in_configure_hw = port100_in_configure_hw, 1468 .in_send_cmd = port100_in_send_cmd, 1469 1470 .tg_listen_mdaa = port100_listen_mdaa, 1471 .tg_listen = port100_listen, 1472 .tg_configure_hw = port100_tg_configure_hw, 1473 .tg_send_cmd = port100_tg_send_cmd, 1474 1475 .switch_rf = port100_switch_rf, 1476 .abort_cmd = port100_abort_cmd, 1477 }; 1478 1479 static const struct usb_device_id port100_table[] = { 1480 { USB_DEVICE(SONY_VENDOR_ID, RCS380_PRODUCT_ID), }, 1481 { } 1482 }; 1483 MODULE_DEVICE_TABLE(usb, port100_table); 1484 1485 static int port100_probe(struct usb_interface *interface, 1486 const struct usb_device_id *id) 1487 { 1488 struct port100 *dev; 1489 int rc; 1490 struct usb_host_interface *iface_desc; 1491 struct usb_endpoint_descriptor *endpoint; 1492 int in_endpoint; 1493 int out_endpoint; 1494 u16 fw_version; 1495 u64 cmd_type_mask; 1496 int i; 1497 1498 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL); 1499 if (!dev) 1500 return -ENOMEM; 1501 1502 mutex_init(&dev->out_urb_lock); 1503 dev->udev = usb_get_dev(interface_to_usbdev(interface)); 1504 dev->interface = interface; 1505 usb_set_intfdata(interface, dev); 1506 1507 in_endpoint = out_endpoint = 0; 1508 iface_desc = interface->cur_altsetting; 1509 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 1510 endpoint = &iface_desc->endpoint[i].desc; 1511 1512 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) 1513 in_endpoint = endpoint->bEndpointAddress; 1514 1515 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) 1516 out_endpoint = endpoint->bEndpointAddress; 1517 } 1518 1519 if (!in_endpoint || !out_endpoint) { 1520 nfc_err(&interface->dev, 1521 "Could not find bulk-in or bulk-out endpoint\n"); 1522 rc = -ENODEV; 1523 goto error; 1524 } 1525 1526 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL); 1527 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL); 1528 1529 if (!dev->in_urb || !dev->out_urb) { 1530 nfc_err(&interface->dev, "Could not allocate USB URBs\n"); 1531 rc = -ENOMEM; 1532 goto error; 1533 } 1534 1535 usb_fill_bulk_urb(dev->in_urb, dev->udev, 1536 usb_rcvbulkpipe(dev->udev, in_endpoint), 1537 NULL, 0, NULL, dev); 1538 usb_fill_bulk_urb(dev->out_urb, dev->udev, 1539 usb_sndbulkpipe(dev->udev, out_endpoint), 1540 NULL, 0, port100_send_complete, dev); 1541 1542 dev->skb_headroom = PORT100_FRAME_HEADER_LEN + 1543 PORT100_COMM_RF_HEAD_MAX_LEN; 1544 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN; 1545 1546 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete); 1547 1548 /* The first thing to do with the Port-100 is to set the command type 1549 * to be used. If supported we use command type 1. 0 otherwise. 1550 */ 1551 cmd_type_mask = port100_get_command_type_mask(dev); 1552 if (!cmd_type_mask) { 1553 nfc_err(&interface->dev, 1554 "Could not get supported command types\n"); 1555 rc = -ENODEV; 1556 goto error; 1557 } 1558 1559 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1)) 1560 dev->cmd_type = PORT100_CMD_TYPE_1; 1561 else 1562 dev->cmd_type = PORT100_CMD_TYPE_0; 1563 1564 rc = port100_set_command_type(dev, dev->cmd_type); 1565 if (rc) { 1566 nfc_err(&interface->dev, 1567 "The device does not support command type %u\n", 1568 dev->cmd_type); 1569 goto error; 1570 } 1571 1572 fw_version = port100_get_firmware_version(dev); 1573 if (!fw_version) 1574 nfc_err(&interface->dev, 1575 "Could not get device firmware version\n"); 1576 1577 nfc_info(&interface->dev, 1578 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n", 1579 (fw_version & 0xFF00) >> 8, fw_version & 0xFF); 1580 1581 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops, 1582 PORT100_PROTOCOLS, 1583 PORT100_CAPABILITIES, 1584 dev->skb_headroom, 1585 dev->skb_tailroom); 1586 if (!dev->nfc_digital_dev) { 1587 nfc_err(&interface->dev, 1588 "Could not allocate nfc_digital_dev\n"); 1589 rc = -ENOMEM; 1590 goto error; 1591 } 1592 1593 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev); 1594 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev); 1595 1596 rc = nfc_digital_register_device(dev->nfc_digital_dev); 1597 if (rc) { 1598 nfc_err(&interface->dev, 1599 "Could not register digital device\n"); 1600 goto free_nfc_dev; 1601 } 1602 1603 return 0; 1604 1605 free_nfc_dev: 1606 nfc_digital_free_device(dev->nfc_digital_dev); 1607 1608 error: 1609 usb_free_urb(dev->in_urb); 1610 usb_free_urb(dev->out_urb); 1611 usb_put_dev(dev->udev); 1612 1613 return rc; 1614 } 1615 1616 static void port100_disconnect(struct usb_interface *interface) 1617 { 1618 struct port100 *dev; 1619 1620 dev = usb_get_intfdata(interface); 1621 usb_set_intfdata(interface, NULL); 1622 1623 nfc_digital_unregister_device(dev->nfc_digital_dev); 1624 nfc_digital_free_device(dev->nfc_digital_dev); 1625 1626 usb_kill_urb(dev->in_urb); 1627 usb_kill_urb(dev->out_urb); 1628 1629 usb_free_urb(dev->in_urb); 1630 usb_free_urb(dev->out_urb); 1631 usb_put_dev(dev->udev); 1632 1633 kfree(dev->cmd); 1634 1635 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected\n"); 1636 } 1637 1638 static struct usb_driver port100_driver = { 1639 .name = "port100", 1640 .probe = port100_probe, 1641 .disconnect = port100_disconnect, 1642 .id_table = port100_table, 1643 }; 1644 1645 module_usb_driver(port100_driver); 1646 1647 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION); 1648 MODULE_VERSION(VERSION); 1649 MODULE_LICENSE("GPL"); 1650