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 RCS380S_PRODUCT_ID 0x06c1 26 #define RCS380P_PRODUCT_ID 0x06c3 27 28 #define PORT100_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \ 29 NFC_PROTO_MIFARE_MASK | \ 30 NFC_PROTO_FELICA_MASK | \ 31 NFC_PROTO_NFC_DEP_MASK | \ 32 NFC_PROTO_ISO14443_MASK | \ 33 NFC_PROTO_ISO14443_B_MASK) 34 35 #define PORT100_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \ 36 NFC_DIGITAL_DRV_CAPS_TG_CRC) 37 38 /* Standard port100 frame definitions */ 39 #define PORT100_FRAME_HEADER_LEN (sizeof(struct port100_frame) \ 40 + 2) /* data[0] CC, data[1] SCC */ 41 #define PORT100_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/ 42 43 #define PORT100_COMM_RF_HEAD_MAX_LEN (sizeof(struct port100_tg_comm_rf_cmd)) 44 45 /* 46 * Max extended frame payload len, excluding CC and SCC 47 * which are already in PORT100_FRAME_HEADER_LEN. 48 */ 49 #define PORT100_FRAME_MAX_PAYLOAD_LEN 1001 50 51 #define PORT100_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2), 52 Postamble (1) */ 53 static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = { 54 0x00, 0x00, 0xff, 0x00, 0xff, 0x00 55 }; 56 57 #define PORT100_FRAME_CHECKSUM(f) (f->data[le16_to_cpu(f->datalen)]) 58 #define PORT100_FRAME_POSTAMBLE(f) (f->data[le16_to_cpu(f->datalen) + 1]) 59 60 /* start of frame */ 61 #define PORT100_FRAME_SOF 0x00FF 62 #define PORT100_FRAME_EXT 0xFFFF 63 #define PORT100_FRAME_ACK 0x00FF 64 65 /* Port-100 command: in or out */ 66 #define PORT100_FRAME_DIRECTION(f) (f->data[0]) /* CC */ 67 #define PORT100_FRAME_DIR_OUT 0xD6 68 #define PORT100_FRAME_DIR_IN 0xD7 69 70 /* Port-100 sub-command */ 71 #define PORT100_FRAME_CMD(f) (f->data[1]) /* SCC */ 72 73 #define PORT100_CMD_GET_FIRMWARE_VERSION 0x20 74 #define PORT100_CMD_GET_COMMAND_TYPE 0x28 75 #define PORT100_CMD_SET_COMMAND_TYPE 0x2A 76 77 #define PORT100_CMD_IN_SET_RF 0x00 78 #define PORT100_CMD_IN_SET_PROTOCOL 0x02 79 #define PORT100_CMD_IN_COMM_RF 0x04 80 81 #define PORT100_CMD_TG_SET_RF 0x40 82 #define PORT100_CMD_TG_SET_PROTOCOL 0x42 83 #define PORT100_CMD_TG_SET_RF_OFF 0x46 84 #define PORT100_CMD_TG_COMM_RF 0x48 85 86 #define PORT100_CMD_SWITCH_RF 0x06 87 88 #define PORT100_CMD_RESPONSE(cmd) (cmd + 1) 89 90 #define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \ 91 ((mask) & (0x01 << (cmd_type))) 92 #define PORT100_CMD_TYPE_0 0 93 #define PORT100_CMD_TYPE_1 1 94 95 #define PORT100_CMD_STATUS_OK 0x00 96 #define PORT100_CMD_STATUS_TIMEOUT 0x80 97 98 #define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01 99 #define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK 0x02 100 101 struct port100; 102 103 typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg, 104 struct sk_buff *resp); 105 106 /** 107 * Setting sets structure for in_set_rf command 108 * 109 * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table. 110 * This table contains multiple RF setting sets required for RF 111 * communication. 112 * 113 * @in_*_comm_type: Theses fields set the communication type to be used. 114 */ 115 struct port100_in_rf_setting { 116 u8 in_send_set_number; 117 u8 in_send_comm_type; 118 u8 in_recv_set_number; 119 u8 in_recv_comm_type; 120 } __packed; 121 122 #define PORT100_COMM_TYPE_IN_212F 0x01 123 #define PORT100_COMM_TYPE_IN_424F 0x02 124 #define PORT100_COMM_TYPE_IN_106A 0x03 125 #define PORT100_COMM_TYPE_IN_106B 0x07 126 127 static const struct port100_in_rf_setting in_rf_settings[] = { 128 [NFC_DIGITAL_RF_TECH_212F] = { 129 .in_send_set_number = 1, 130 .in_send_comm_type = PORT100_COMM_TYPE_IN_212F, 131 .in_recv_set_number = 15, 132 .in_recv_comm_type = PORT100_COMM_TYPE_IN_212F, 133 }, 134 [NFC_DIGITAL_RF_TECH_424F] = { 135 .in_send_set_number = 1, 136 .in_send_comm_type = PORT100_COMM_TYPE_IN_424F, 137 .in_recv_set_number = 15, 138 .in_recv_comm_type = PORT100_COMM_TYPE_IN_424F, 139 }, 140 [NFC_DIGITAL_RF_TECH_106A] = { 141 .in_send_set_number = 2, 142 .in_send_comm_type = PORT100_COMM_TYPE_IN_106A, 143 .in_recv_set_number = 15, 144 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106A, 145 }, 146 [NFC_DIGITAL_RF_TECH_106B] = { 147 .in_send_set_number = 3, 148 .in_send_comm_type = PORT100_COMM_TYPE_IN_106B, 149 .in_recv_set_number = 15, 150 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106B, 151 }, 152 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */ 153 [NFC_DIGITAL_RF_TECH_LAST] = { 0 }, 154 }; 155 156 /** 157 * Setting sets structure for tg_set_rf command 158 * 159 * @tg_set_number: Represents the entry index in the port-100 RF Base Table. 160 * This table contains multiple RF setting sets required for RF 161 * communication. this field is used for both send and receive 162 * settings. 163 * 164 * @tg_comm_type: Sets the communication type to be used to send and receive 165 * data. 166 */ 167 struct port100_tg_rf_setting { 168 u8 tg_set_number; 169 u8 tg_comm_type; 170 } __packed; 171 172 #define PORT100_COMM_TYPE_TG_106A 0x0B 173 #define PORT100_COMM_TYPE_TG_212F 0x0C 174 #define PORT100_COMM_TYPE_TG_424F 0x0D 175 176 static const struct port100_tg_rf_setting tg_rf_settings[] = { 177 [NFC_DIGITAL_RF_TECH_106A] = { 178 .tg_set_number = 8, 179 .tg_comm_type = PORT100_COMM_TYPE_TG_106A, 180 }, 181 [NFC_DIGITAL_RF_TECH_212F] = { 182 .tg_set_number = 8, 183 .tg_comm_type = PORT100_COMM_TYPE_TG_212F, 184 }, 185 [NFC_DIGITAL_RF_TECH_424F] = { 186 .tg_set_number = 8, 187 .tg_comm_type = PORT100_COMM_TYPE_TG_424F, 188 }, 189 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */ 190 [NFC_DIGITAL_RF_TECH_LAST] = { 0 }, 191 192 }; 193 194 #define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00 195 #define PORT100_IN_PROT_ADD_CRC 0x01 196 #define PORT100_IN_PROT_CHECK_CRC 0x02 197 #define PORT100_IN_PROT_MULTI_CARD 0x03 198 #define PORT100_IN_PROT_ADD_PARITY 0x04 199 #define PORT100_IN_PROT_CHECK_PARITY 0x05 200 #define PORT100_IN_PROT_BITWISE_AC_RECV_MODE 0x06 201 #define PORT100_IN_PROT_VALID_BIT_NUMBER 0x07 202 #define PORT100_IN_PROT_CRYPTO1 0x08 203 #define PORT100_IN_PROT_ADD_SOF 0x09 204 #define PORT100_IN_PROT_CHECK_SOF 0x0A 205 #define PORT100_IN_PROT_ADD_EOF 0x0B 206 #define PORT100_IN_PROT_CHECK_EOF 0x0C 207 #define PORT100_IN_PROT_DEAF_TIME 0x0E 208 #define PORT100_IN_PROT_CRM 0x0F 209 #define PORT100_IN_PROT_CRM_MIN_LEN 0x10 210 #define PORT100_IN_PROT_T1_TAG_FRAME 0x11 211 #define PORT100_IN_PROT_RFCA 0x12 212 #define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13 213 #define PORT100_IN_PROT_END 0x14 214 215 #define PORT100_IN_MAX_NUM_PROTOCOLS 19 216 217 #define PORT100_TG_PROT_TU 0x00 218 #define PORT100_TG_PROT_RF_OFF 0x01 219 #define PORT100_TG_PROT_CRM 0x02 220 #define PORT100_TG_PROT_END 0x03 221 222 #define PORT100_TG_MAX_NUM_PROTOCOLS 3 223 224 struct port100_protocol { 225 u8 number; 226 u8 value; 227 } __packed; 228 229 static struct port100_protocol 230 in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = { 231 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = { 232 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 }, 233 { PORT100_IN_PROT_ADD_CRC, 0 }, 234 { PORT100_IN_PROT_CHECK_CRC, 0 }, 235 { PORT100_IN_PROT_MULTI_CARD, 0 }, 236 { PORT100_IN_PROT_ADD_PARITY, 0 }, 237 { PORT100_IN_PROT_CHECK_PARITY, 1 }, 238 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 239 { PORT100_IN_PROT_VALID_BIT_NUMBER, 7 }, 240 { PORT100_IN_PROT_CRYPTO1, 0 }, 241 { PORT100_IN_PROT_ADD_SOF, 0 }, 242 { PORT100_IN_PROT_CHECK_SOF, 0 }, 243 { PORT100_IN_PROT_ADD_EOF, 0 }, 244 { PORT100_IN_PROT_CHECK_EOF, 0 }, 245 { PORT100_IN_PROT_DEAF_TIME, 4 }, 246 { PORT100_IN_PROT_CRM, 0 }, 247 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 248 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 249 { PORT100_IN_PROT_RFCA, 0 }, 250 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 251 { PORT100_IN_PROT_END, 0 }, 252 }, 253 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = { 254 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 }, 255 { PORT100_IN_PROT_ADD_CRC, 0 }, 256 { PORT100_IN_PROT_CHECK_CRC, 0 }, 257 { PORT100_IN_PROT_MULTI_CARD, 0 }, 258 { PORT100_IN_PROT_ADD_PARITY, 1 }, 259 { PORT100_IN_PROT_CHECK_PARITY, 1 }, 260 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 261 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 262 { PORT100_IN_PROT_CRYPTO1, 0 }, 263 { PORT100_IN_PROT_ADD_SOF, 0 }, 264 { PORT100_IN_PROT_CHECK_SOF, 0 }, 265 { PORT100_IN_PROT_ADD_EOF, 0 }, 266 { PORT100_IN_PROT_CHECK_EOF, 0 }, 267 { PORT100_IN_PROT_DEAF_TIME, 4 }, 268 { PORT100_IN_PROT_CRM, 0 }, 269 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 270 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 271 { PORT100_IN_PROT_RFCA, 0 }, 272 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 273 { PORT100_IN_PROT_END, 0 }, 274 }, 275 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = { 276 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 }, 277 { PORT100_IN_PROT_ADD_CRC, 1 }, 278 { PORT100_IN_PROT_CHECK_CRC, 1 }, 279 { PORT100_IN_PROT_MULTI_CARD, 0 }, 280 { PORT100_IN_PROT_ADD_PARITY, 1 }, 281 { PORT100_IN_PROT_CHECK_PARITY, 1 }, 282 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 283 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 284 { PORT100_IN_PROT_CRYPTO1, 0 }, 285 { PORT100_IN_PROT_ADD_SOF, 0 }, 286 { PORT100_IN_PROT_CHECK_SOF, 0 }, 287 { PORT100_IN_PROT_ADD_EOF, 0 }, 288 { PORT100_IN_PROT_CHECK_EOF, 0 }, 289 { PORT100_IN_PROT_DEAF_TIME, 4 }, 290 { PORT100_IN_PROT_CRM, 0 }, 291 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 292 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 293 { PORT100_IN_PROT_RFCA, 0 }, 294 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 295 { PORT100_IN_PROT_END, 0 }, 296 }, 297 [NFC_DIGITAL_FRAMING_NFCA_T1T] = { 298 /* nfc_digital_framing_nfca_short */ 299 { PORT100_IN_PROT_ADD_CRC, 2 }, 300 { PORT100_IN_PROT_CHECK_CRC, 2 }, 301 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 302 { PORT100_IN_PROT_T1_TAG_FRAME, 2 }, 303 { PORT100_IN_PROT_END, 0 }, 304 }, 305 [NFC_DIGITAL_FRAMING_NFCA_T2T] = { 306 /* nfc_digital_framing_nfca_standard */ 307 { PORT100_IN_PROT_ADD_CRC, 1 }, 308 { PORT100_IN_PROT_CHECK_CRC, 0 }, 309 { PORT100_IN_PROT_END, 0 }, 310 }, 311 [NFC_DIGITAL_FRAMING_NFCA_T4T] = { 312 /* nfc_digital_framing_nfca_standard_with_crc_a */ 313 { PORT100_IN_PROT_END, 0 }, 314 }, 315 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = { 316 /* nfc_digital_framing_nfca_standard */ 317 { PORT100_IN_PROT_END, 0 }, 318 }, 319 [NFC_DIGITAL_FRAMING_NFCF] = { 320 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 }, 321 { PORT100_IN_PROT_ADD_CRC, 1 }, 322 { PORT100_IN_PROT_CHECK_CRC, 1 }, 323 { PORT100_IN_PROT_MULTI_CARD, 0 }, 324 { PORT100_IN_PROT_ADD_PARITY, 0 }, 325 { PORT100_IN_PROT_CHECK_PARITY, 0 }, 326 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 327 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 328 { PORT100_IN_PROT_CRYPTO1, 0 }, 329 { PORT100_IN_PROT_ADD_SOF, 0 }, 330 { PORT100_IN_PROT_CHECK_SOF, 0 }, 331 { PORT100_IN_PROT_ADD_EOF, 0 }, 332 { PORT100_IN_PROT_CHECK_EOF, 0 }, 333 { PORT100_IN_PROT_DEAF_TIME, 4 }, 334 { PORT100_IN_PROT_CRM, 0 }, 335 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 336 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 337 { PORT100_IN_PROT_RFCA, 0 }, 338 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 339 { PORT100_IN_PROT_END, 0 }, 340 }, 341 [NFC_DIGITAL_FRAMING_NFCF_T3T] = { 342 /* nfc_digital_framing_nfcf */ 343 { PORT100_IN_PROT_END, 0 }, 344 }, 345 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = { 346 /* nfc_digital_framing_nfcf */ 347 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 }, 348 { PORT100_IN_PROT_ADD_CRC, 1 }, 349 { PORT100_IN_PROT_CHECK_CRC, 1 }, 350 { PORT100_IN_PROT_MULTI_CARD, 0 }, 351 { PORT100_IN_PROT_ADD_PARITY, 0 }, 352 { PORT100_IN_PROT_CHECK_PARITY, 0 }, 353 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 354 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 355 { PORT100_IN_PROT_CRYPTO1, 0 }, 356 { PORT100_IN_PROT_ADD_SOF, 0 }, 357 { PORT100_IN_PROT_CHECK_SOF, 0 }, 358 { PORT100_IN_PROT_ADD_EOF, 0 }, 359 { PORT100_IN_PROT_CHECK_EOF, 0 }, 360 { PORT100_IN_PROT_DEAF_TIME, 4 }, 361 { PORT100_IN_PROT_CRM, 0 }, 362 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 363 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 364 { PORT100_IN_PROT_RFCA, 0 }, 365 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 366 { PORT100_IN_PROT_END, 0 }, 367 }, 368 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = { 369 { PORT100_IN_PROT_END, 0 }, 370 }, 371 [NFC_DIGITAL_FRAMING_NFCB] = { 372 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 20 }, 373 { PORT100_IN_PROT_ADD_CRC, 1 }, 374 { PORT100_IN_PROT_CHECK_CRC, 1 }, 375 { PORT100_IN_PROT_MULTI_CARD, 0 }, 376 { PORT100_IN_PROT_ADD_PARITY, 0 }, 377 { PORT100_IN_PROT_CHECK_PARITY, 0 }, 378 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 379 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 380 { PORT100_IN_PROT_CRYPTO1, 0 }, 381 { PORT100_IN_PROT_ADD_SOF, 1 }, 382 { PORT100_IN_PROT_CHECK_SOF, 1 }, 383 { PORT100_IN_PROT_ADD_EOF, 1 }, 384 { PORT100_IN_PROT_CHECK_EOF, 1 }, 385 { PORT100_IN_PROT_DEAF_TIME, 4 }, 386 { PORT100_IN_PROT_CRM, 0 }, 387 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 388 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 389 { PORT100_IN_PROT_RFCA, 0 }, 390 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 391 { PORT100_IN_PROT_END, 0 }, 392 }, 393 [NFC_DIGITAL_FRAMING_NFCB_T4T] = { 394 /* nfc_digital_framing_nfcb */ 395 { PORT100_IN_PROT_END, 0 }, 396 }, 397 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */ 398 [NFC_DIGITAL_FRAMING_LAST] = { 399 { PORT100_IN_PROT_END, 0 }, 400 }, 401 }; 402 403 static struct port100_protocol 404 tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = { 405 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = { 406 { PORT100_TG_PROT_END, 0 }, 407 }, 408 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = { 409 { PORT100_TG_PROT_END, 0 }, 410 }, 411 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = { 412 { PORT100_TG_PROT_END, 0 }, 413 }, 414 [NFC_DIGITAL_FRAMING_NFCA_T1T] = { 415 { PORT100_TG_PROT_END, 0 }, 416 }, 417 [NFC_DIGITAL_FRAMING_NFCA_T2T] = { 418 { PORT100_TG_PROT_END, 0 }, 419 }, 420 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = { 421 { PORT100_TG_PROT_TU, 1 }, 422 { PORT100_TG_PROT_RF_OFF, 0 }, 423 { PORT100_TG_PROT_CRM, 7 }, 424 { PORT100_TG_PROT_END, 0 }, 425 }, 426 [NFC_DIGITAL_FRAMING_NFCF] = { 427 { PORT100_TG_PROT_END, 0 }, 428 }, 429 [NFC_DIGITAL_FRAMING_NFCF_T3T] = { 430 { PORT100_TG_PROT_END, 0 }, 431 }, 432 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = { 433 { PORT100_TG_PROT_TU, 1 }, 434 { PORT100_TG_PROT_RF_OFF, 0 }, 435 { PORT100_TG_PROT_CRM, 7 }, 436 { PORT100_TG_PROT_END, 0 }, 437 }, 438 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = { 439 { PORT100_TG_PROT_RF_OFF, 1 }, 440 { PORT100_TG_PROT_END, 0 }, 441 }, 442 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */ 443 [NFC_DIGITAL_FRAMING_LAST] = { 444 { PORT100_TG_PROT_END, 0 }, 445 }, 446 }; 447 448 struct port100 { 449 struct nfc_digital_dev *nfc_digital_dev; 450 451 int skb_headroom; 452 int skb_tailroom; 453 454 struct usb_device *udev; 455 struct usb_interface *interface; 456 457 struct urb *out_urb; 458 struct urb *in_urb; 459 460 /* This mutex protects the out_urb and avoids to submit a new command 461 * through port100_send_frame_async() while the previous one is being 462 * canceled through port100_abort_cmd(). 463 */ 464 struct mutex out_urb_lock; 465 466 struct work_struct cmd_complete_work; 467 468 u8 cmd_type; 469 470 /* The digital stack serializes commands to be sent. There is no need 471 * for any queuing/locking mechanism at driver level. 472 */ 473 struct port100_cmd *cmd; 474 475 bool cmd_cancel; 476 struct completion cmd_cancel_done; 477 }; 478 479 struct port100_cmd { 480 u8 code; 481 int status; 482 struct sk_buff *req; 483 struct sk_buff *resp; 484 int resp_len; 485 port100_send_async_complete_t complete_cb; 486 void *complete_cb_context; 487 }; 488 489 struct port100_frame { 490 u8 preamble; 491 __be16 start_frame; 492 __be16 extended_frame; 493 __le16 datalen; 494 u8 datalen_checksum; 495 u8 data[]; 496 } __packed; 497 498 struct port100_ack_frame { 499 u8 preamble; 500 __be16 start_frame; 501 __be16 ack_frame; 502 u8 postambule; 503 } __packed; 504 505 struct port100_cb_arg { 506 nfc_digital_cmd_complete_t complete_cb; 507 void *complete_arg; 508 u8 mdaa; 509 }; 510 511 struct port100_tg_comm_rf_cmd { 512 __le16 guard_time; 513 __le16 send_timeout; 514 u8 mdaa; 515 u8 nfca_param[6]; 516 u8 nfcf_param[18]; 517 u8 mf_halted; 518 u8 arae_flag; 519 __le16 recv_timeout; 520 u8 data[]; 521 } __packed; 522 523 struct port100_tg_comm_rf_res { 524 u8 comm_type; 525 u8 ar_status; 526 u8 target_activated; 527 __le32 status; 528 u8 data[]; 529 } __packed; 530 531 /* The rule: value + checksum = 0 */ 532 static inline u8 port100_checksum(u16 value) 533 { 534 return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1; 535 } 536 537 /* The rule: sum(data elements) + checksum = 0 */ 538 static u8 port100_data_checksum(u8 *data, int datalen) 539 { 540 u8 sum = 0; 541 int i; 542 543 for (i = 0; i < datalen; i++) 544 sum += data[i]; 545 546 return port100_checksum(sum); 547 } 548 549 static void port100_tx_frame_init(void *_frame, u8 cmd_code) 550 { 551 struct port100_frame *frame = _frame; 552 553 frame->preamble = 0; 554 frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF); 555 frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT); 556 PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT; 557 PORT100_FRAME_CMD(frame) = cmd_code; 558 frame->datalen = cpu_to_le16(2); 559 } 560 561 static void port100_tx_frame_finish(void *_frame) 562 { 563 struct port100_frame *frame = _frame; 564 565 frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen)); 566 567 PORT100_FRAME_CHECKSUM(frame) = 568 port100_data_checksum(frame->data, le16_to_cpu(frame->datalen)); 569 570 PORT100_FRAME_POSTAMBLE(frame) = 0; 571 } 572 573 static void port100_tx_update_payload_len(void *_frame, int len) 574 { 575 struct port100_frame *frame = _frame; 576 577 frame->datalen = cpu_to_le16(le16_to_cpu(frame->datalen) + len); 578 } 579 580 static bool port100_rx_frame_is_valid(void *_frame) 581 { 582 u8 checksum; 583 struct port100_frame *frame = _frame; 584 585 if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) || 586 frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT)) 587 return false; 588 589 checksum = port100_checksum(le16_to_cpu(frame->datalen)); 590 if (checksum != frame->datalen_checksum) 591 return false; 592 593 checksum = port100_data_checksum(frame->data, 594 le16_to_cpu(frame->datalen)); 595 if (checksum != PORT100_FRAME_CHECKSUM(frame)) 596 return false; 597 598 return true; 599 } 600 601 static bool port100_rx_frame_is_ack(struct port100_ack_frame *frame) 602 { 603 return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) && 604 frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK)); 605 } 606 607 static inline int port100_rx_frame_size(void *frame) 608 { 609 struct port100_frame *f = frame; 610 611 return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) + 612 PORT100_FRAME_TAIL_LEN; 613 } 614 615 static bool port100_rx_frame_is_cmd_response(struct port100 *dev, void *frame) 616 { 617 struct port100_frame *f = frame; 618 619 return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code)); 620 } 621 622 static void port100_recv_response(struct urb *urb) 623 { 624 struct port100 *dev = urb->context; 625 struct port100_cmd *cmd = dev->cmd; 626 u8 *in_frame; 627 628 cmd->status = urb->status; 629 630 switch (urb->status) { 631 case 0: 632 break; /* success */ 633 case -ECONNRESET: 634 case -ENOENT: 635 nfc_err(&dev->interface->dev, 636 "The urb has been canceled (status %d)\n", urb->status); 637 goto sched_wq; 638 case -ESHUTDOWN: 639 default: 640 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 641 urb->status); 642 goto sched_wq; 643 } 644 645 in_frame = dev->in_urb->transfer_buffer; 646 647 if (!port100_rx_frame_is_valid(in_frame)) { 648 nfc_err(&dev->interface->dev, "Received an invalid frame\n"); 649 cmd->status = -EIO; 650 goto sched_wq; 651 } 652 653 print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame, 654 port100_rx_frame_size(in_frame), false); 655 656 if (!port100_rx_frame_is_cmd_response(dev, in_frame)) { 657 nfc_err(&dev->interface->dev, 658 "It's not the response to the last command\n"); 659 cmd->status = -EIO; 660 goto sched_wq; 661 } 662 663 sched_wq: 664 schedule_work(&dev->cmd_complete_work); 665 } 666 667 static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags) 668 { 669 dev->in_urb->complete = port100_recv_response; 670 671 return usb_submit_urb(dev->in_urb, flags); 672 } 673 674 static void port100_recv_ack(struct urb *urb) 675 { 676 struct port100 *dev = urb->context; 677 struct port100_cmd *cmd = dev->cmd; 678 struct port100_ack_frame *in_frame; 679 int rc; 680 681 cmd->status = urb->status; 682 683 switch (urb->status) { 684 case 0: 685 break; /* success */ 686 case -ECONNRESET: 687 case -ENOENT: 688 nfc_err(&dev->interface->dev, 689 "The urb has been stopped (status %d)\n", urb->status); 690 goto sched_wq; 691 case -ESHUTDOWN: 692 default: 693 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 694 urb->status); 695 goto sched_wq; 696 } 697 698 in_frame = dev->in_urb->transfer_buffer; 699 700 if (!port100_rx_frame_is_ack(in_frame)) { 701 nfc_err(&dev->interface->dev, "Received an invalid ack\n"); 702 cmd->status = -EIO; 703 goto sched_wq; 704 } 705 706 rc = port100_submit_urb_for_response(dev, GFP_ATOMIC); 707 if (rc) { 708 nfc_err(&dev->interface->dev, 709 "usb_submit_urb failed with result %d\n", rc); 710 cmd->status = rc; 711 goto sched_wq; 712 } 713 714 return; 715 716 sched_wq: 717 schedule_work(&dev->cmd_complete_work); 718 } 719 720 static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags) 721 { 722 dev->in_urb->complete = port100_recv_ack; 723 724 return usb_submit_urb(dev->in_urb, flags); 725 } 726 727 static int port100_send_ack(struct port100 *dev) 728 { 729 int rc = 0; 730 731 mutex_lock(&dev->out_urb_lock); 732 733 /* 734 * If prior cancel is in-flight (dev->cmd_cancel == true), we 735 * can skip to send cancel. Then this will wait the prior 736 * cancel, or merged into the next cancel rarely if next 737 * cancel was started before waiting done. In any case, this 738 * will be waked up soon or later. 739 */ 740 if (!dev->cmd_cancel) { 741 reinit_completion(&dev->cmd_cancel_done); 742 743 usb_kill_urb(dev->out_urb); 744 745 dev->out_urb->transfer_buffer = ack_frame; 746 dev->out_urb->transfer_buffer_length = sizeof(ack_frame); 747 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL); 748 749 /* 750 * Set the cmd_cancel flag only if the URB has been 751 * successfully submitted. It will be reset by the out 752 * URB completion callback port100_send_complete(). 753 */ 754 dev->cmd_cancel = !rc; 755 } 756 757 mutex_unlock(&dev->out_urb_lock); 758 759 if (!rc) 760 wait_for_completion(&dev->cmd_cancel_done); 761 762 return rc; 763 } 764 765 static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out, 766 struct sk_buff *in, int in_len) 767 { 768 int rc; 769 770 mutex_lock(&dev->out_urb_lock); 771 772 /* A command cancel frame as been sent through dev->out_urb. Don't try 773 * to submit a new one. 774 */ 775 if (dev->cmd_cancel) { 776 rc = -EAGAIN; 777 goto exit; 778 } 779 780 dev->out_urb->transfer_buffer = out->data; 781 dev->out_urb->transfer_buffer_length = out->len; 782 783 dev->in_urb->transfer_buffer = in->data; 784 dev->in_urb->transfer_buffer_length = in_len; 785 786 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1, 787 out->data, out->len, false); 788 789 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL); 790 if (rc) 791 goto exit; 792 793 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL); 794 if (rc) 795 usb_unlink_urb(dev->out_urb); 796 797 exit: 798 mutex_unlock(&dev->out_urb_lock); 799 800 return rc; 801 } 802 803 static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code, 804 struct sk_buff *skb) 805 { 806 /* payload is already there, just update datalen */ 807 int payload_len = skb->len; 808 809 skb_push(skb, PORT100_FRAME_HEADER_LEN); 810 skb_put(skb, PORT100_FRAME_TAIL_LEN); 811 812 port100_tx_frame_init(skb->data, cmd_code); 813 port100_tx_update_payload_len(skb->data, payload_len); 814 port100_tx_frame_finish(skb->data); 815 } 816 817 static void port100_send_async_complete(struct port100 *dev) 818 { 819 struct port100_cmd *cmd = dev->cmd; 820 int status = cmd->status; 821 822 struct sk_buff *req = cmd->req; 823 struct sk_buff *resp = cmd->resp; 824 825 dev_kfree_skb(req); 826 827 dev->cmd = NULL; 828 829 if (status < 0) { 830 cmd->complete_cb(dev, cmd->complete_cb_context, 831 ERR_PTR(status)); 832 dev_kfree_skb(resp); 833 goto done; 834 } 835 836 skb_put(resp, port100_rx_frame_size(resp->data)); 837 skb_pull(resp, PORT100_FRAME_HEADER_LEN); 838 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN); 839 840 cmd->complete_cb(dev, cmd->complete_cb_context, resp); 841 842 done: 843 kfree(cmd); 844 } 845 846 static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code, 847 struct sk_buff *req, 848 port100_send_async_complete_t complete_cb, 849 void *complete_cb_context) 850 { 851 struct port100_cmd *cmd; 852 struct sk_buff *resp; 853 int rc; 854 int resp_len = PORT100_FRAME_HEADER_LEN + 855 PORT100_FRAME_MAX_PAYLOAD_LEN + 856 PORT100_FRAME_TAIL_LEN; 857 858 if (dev->cmd) { 859 nfc_err(&dev->interface->dev, 860 "A command is still in process\n"); 861 return -EBUSY; 862 } 863 864 resp = alloc_skb(resp_len, GFP_KERNEL); 865 if (!resp) 866 return -ENOMEM; 867 868 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 869 if (!cmd) { 870 dev_kfree_skb(resp); 871 return -ENOMEM; 872 } 873 874 cmd->code = cmd_code; 875 cmd->req = req; 876 cmd->resp = resp; 877 cmd->resp_len = resp_len; 878 cmd->complete_cb = complete_cb; 879 cmd->complete_cb_context = complete_cb_context; 880 881 port100_build_cmd_frame(dev, cmd_code, req); 882 883 dev->cmd = cmd; 884 885 rc = port100_send_frame_async(dev, req, resp, resp_len); 886 if (rc) { 887 kfree(cmd); 888 dev_kfree_skb(resp); 889 dev->cmd = NULL; 890 } 891 892 return rc; 893 } 894 895 struct port100_sync_cmd_response { 896 struct sk_buff *resp; 897 struct completion done; 898 }; 899 900 static void port100_wq_cmd_complete(struct work_struct *work) 901 { 902 struct port100 *dev = container_of(work, struct port100, 903 cmd_complete_work); 904 905 port100_send_async_complete(dev); 906 } 907 908 static void port100_send_sync_complete(struct port100 *dev, void *_arg, 909 struct sk_buff *resp) 910 { 911 struct port100_sync_cmd_response *arg = _arg; 912 913 arg->resp = resp; 914 complete(&arg->done); 915 } 916 917 static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code, 918 struct sk_buff *req) 919 { 920 int rc; 921 struct port100_sync_cmd_response arg; 922 923 init_completion(&arg.done); 924 925 rc = port100_send_cmd_async(dev, cmd_code, req, 926 port100_send_sync_complete, &arg); 927 if (rc) { 928 dev_kfree_skb(req); 929 return ERR_PTR(rc); 930 } 931 932 wait_for_completion(&arg.done); 933 934 return arg.resp; 935 } 936 937 static void port100_send_complete(struct urb *urb) 938 { 939 struct port100 *dev = urb->context; 940 941 if (dev->cmd_cancel) { 942 complete_all(&dev->cmd_cancel_done); 943 dev->cmd_cancel = false; 944 } 945 946 switch (urb->status) { 947 case 0: 948 break; /* success */ 949 case -ECONNRESET: 950 case -ENOENT: 951 nfc_err(&dev->interface->dev, 952 "The urb has been stopped (status %d)\n", urb->status); 953 break; 954 case -ESHUTDOWN: 955 default: 956 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 957 urb->status); 958 } 959 } 960 961 static void port100_abort_cmd(struct nfc_digital_dev *ddev) 962 { 963 struct port100 *dev = nfc_digital_get_drvdata(ddev); 964 965 /* An ack will cancel the last issued command */ 966 port100_send_ack(dev); 967 968 /* cancel the urb request */ 969 usb_kill_urb(dev->in_urb); 970 } 971 972 static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size) 973 { 974 struct sk_buff *skb; 975 976 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size, 977 GFP_KERNEL); 978 if (skb) 979 skb_reserve(skb, dev->skb_headroom); 980 981 return skb; 982 } 983 984 static int port100_set_command_type(struct port100 *dev, u8 command_type) 985 { 986 struct sk_buff *skb; 987 struct sk_buff *resp; 988 int rc; 989 990 skb = port100_alloc_skb(dev, 1); 991 if (!skb) 992 return -ENOMEM; 993 994 skb_put_u8(skb, command_type); 995 996 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb); 997 if (IS_ERR(resp)) 998 return PTR_ERR(resp); 999 1000 rc = resp->data[0]; 1001 1002 dev_kfree_skb(resp); 1003 1004 return rc; 1005 } 1006 1007 static u64 port100_get_command_type_mask(struct port100 *dev) 1008 { 1009 struct sk_buff *skb; 1010 struct sk_buff *resp; 1011 u64 mask; 1012 1013 skb = port100_alloc_skb(dev, 0); 1014 if (!skb) 1015 return -ENOMEM; 1016 1017 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb); 1018 if (IS_ERR(resp)) 1019 return PTR_ERR(resp); 1020 1021 if (resp->len < 8) 1022 mask = 0; 1023 else 1024 mask = be64_to_cpu(*(__be64 *)resp->data); 1025 1026 dev_kfree_skb(resp); 1027 1028 return mask; 1029 } 1030 1031 static u16 port100_get_firmware_version(struct port100 *dev) 1032 { 1033 struct sk_buff *skb; 1034 struct sk_buff *resp; 1035 u16 fw_ver; 1036 1037 skb = port100_alloc_skb(dev, 0); 1038 if (!skb) 1039 return 0; 1040 1041 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION, 1042 skb); 1043 if (IS_ERR(resp)) 1044 return 0; 1045 1046 fw_ver = le16_to_cpu(*(__le16 *)resp->data); 1047 1048 dev_kfree_skb(resp); 1049 1050 return fw_ver; 1051 } 1052 1053 static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on) 1054 { 1055 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1056 struct sk_buff *skb, *resp; 1057 1058 skb = port100_alloc_skb(dev, 1); 1059 if (!skb) 1060 return -ENOMEM; 1061 1062 skb_put_u8(skb, on ? 1 : 0); 1063 1064 /* Cancel the last command if the device is being switched off */ 1065 if (!on) 1066 port100_abort_cmd(ddev); 1067 1068 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb); 1069 1070 if (IS_ERR(resp)) 1071 return PTR_ERR(resp); 1072 1073 dev_kfree_skb(resp); 1074 1075 return 0; 1076 } 1077 1078 static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf) 1079 { 1080 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1081 struct sk_buff *skb; 1082 struct sk_buff *resp; 1083 int rc; 1084 1085 if (rf >= NFC_DIGITAL_RF_TECH_LAST) 1086 return -EINVAL; 1087 1088 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting)); 1089 if (!skb) 1090 return -ENOMEM; 1091 1092 skb_put_data(skb, &in_rf_settings[rf], 1093 sizeof(struct port100_in_rf_setting)); 1094 1095 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb); 1096 1097 if (IS_ERR(resp)) 1098 return PTR_ERR(resp); 1099 1100 rc = resp->data[0]; 1101 1102 dev_kfree_skb(resp); 1103 1104 return rc; 1105 } 1106 1107 static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param) 1108 { 1109 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1110 struct port100_protocol *protocols; 1111 struct sk_buff *skb; 1112 struct sk_buff *resp; 1113 int num_protocols; 1114 size_t size; 1115 int rc; 1116 1117 if (param >= NFC_DIGITAL_FRAMING_LAST) 1118 return -EINVAL; 1119 1120 protocols = in_protocols[param]; 1121 1122 num_protocols = 0; 1123 while (protocols[num_protocols].number != PORT100_IN_PROT_END) 1124 num_protocols++; 1125 1126 if (!num_protocols) 1127 return 0; 1128 1129 size = sizeof(struct port100_protocol) * num_protocols; 1130 1131 skb = port100_alloc_skb(dev, size); 1132 if (!skb) 1133 return -ENOMEM; 1134 1135 skb_put_data(skb, protocols, size); 1136 1137 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb); 1138 1139 if (IS_ERR(resp)) 1140 return PTR_ERR(resp); 1141 1142 rc = resp->data[0]; 1143 1144 dev_kfree_skb(resp); 1145 1146 return rc; 1147 } 1148 1149 static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type, 1150 int param) 1151 { 1152 if (type == NFC_DIGITAL_CONFIG_RF_TECH) 1153 return port100_in_set_rf(ddev, param); 1154 1155 if (type == NFC_DIGITAL_CONFIG_FRAMING) 1156 return port100_in_set_framing(ddev, param); 1157 1158 return -EINVAL; 1159 } 1160 1161 static void port100_in_comm_rf_complete(struct port100 *dev, void *arg, 1162 struct sk_buff *resp) 1163 { 1164 struct port100_cb_arg *cb_arg = arg; 1165 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; 1166 u32 status; 1167 int rc; 1168 1169 if (IS_ERR(resp)) { 1170 rc = PTR_ERR(resp); 1171 goto exit; 1172 } 1173 1174 if (resp->len < 4) { 1175 nfc_err(&dev->interface->dev, 1176 "Invalid packet length received\n"); 1177 rc = -EIO; 1178 goto error; 1179 } 1180 1181 status = le32_to_cpu(*(__le32 *)resp->data); 1182 1183 skb_pull(resp, sizeof(u32)); 1184 1185 if (status == PORT100_CMD_STATUS_TIMEOUT) { 1186 rc = -ETIMEDOUT; 1187 goto error; 1188 } 1189 1190 if (status != PORT100_CMD_STATUS_OK) { 1191 nfc_err(&dev->interface->dev, 1192 "in_comm_rf failed with status 0x%08x\n", status); 1193 rc = -EIO; 1194 goto error; 1195 } 1196 1197 /* Remove collision bits byte */ 1198 skb_pull(resp, 1); 1199 1200 goto exit; 1201 1202 error: 1203 kfree_skb(resp); 1204 resp = ERR_PTR(rc); 1205 1206 exit: 1207 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); 1208 1209 kfree(cb_arg); 1210 } 1211 1212 static int port100_in_send_cmd(struct nfc_digital_dev *ddev, 1213 struct sk_buff *skb, u16 _timeout, 1214 nfc_digital_cmd_complete_t cb, void *arg) 1215 { 1216 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1217 struct port100_cb_arg *cb_arg; 1218 __le16 timeout; 1219 1220 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1221 if (!cb_arg) 1222 return -ENOMEM; 1223 1224 cb_arg->complete_cb = cb; 1225 cb_arg->complete_arg = arg; 1226 1227 timeout = cpu_to_le16(_timeout * 10); 1228 1229 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16)); 1230 1231 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb, 1232 port100_in_comm_rf_complete, cb_arg); 1233 } 1234 1235 static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf) 1236 { 1237 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1238 struct sk_buff *skb; 1239 struct sk_buff *resp; 1240 int rc; 1241 1242 if (rf >= NFC_DIGITAL_RF_TECH_LAST) 1243 return -EINVAL; 1244 1245 skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting)); 1246 if (!skb) 1247 return -ENOMEM; 1248 1249 skb_put_data(skb, &tg_rf_settings[rf], 1250 sizeof(struct port100_tg_rf_setting)); 1251 1252 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb); 1253 1254 if (IS_ERR(resp)) 1255 return PTR_ERR(resp); 1256 1257 rc = resp->data[0]; 1258 1259 dev_kfree_skb(resp); 1260 1261 return rc; 1262 } 1263 1264 static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param) 1265 { 1266 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1267 struct port100_protocol *protocols; 1268 struct sk_buff *skb; 1269 struct sk_buff *resp; 1270 int rc; 1271 int num_protocols; 1272 size_t size; 1273 1274 if (param >= NFC_DIGITAL_FRAMING_LAST) 1275 return -EINVAL; 1276 1277 protocols = tg_protocols[param]; 1278 1279 num_protocols = 0; 1280 while (protocols[num_protocols].number != PORT100_TG_PROT_END) 1281 num_protocols++; 1282 1283 if (!num_protocols) 1284 return 0; 1285 1286 size = sizeof(struct port100_protocol) * num_protocols; 1287 1288 skb = port100_alloc_skb(dev, size); 1289 if (!skb) 1290 return -ENOMEM; 1291 1292 skb_put_data(skb, protocols, size); 1293 1294 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb); 1295 1296 if (IS_ERR(resp)) 1297 return PTR_ERR(resp); 1298 1299 rc = resp->data[0]; 1300 1301 dev_kfree_skb(resp); 1302 1303 return rc; 1304 } 1305 1306 static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type, 1307 int param) 1308 { 1309 if (type == NFC_DIGITAL_CONFIG_RF_TECH) 1310 return port100_tg_set_rf(ddev, param); 1311 1312 if (type == NFC_DIGITAL_CONFIG_FRAMING) 1313 return port100_tg_set_framing(ddev, param); 1314 1315 return -EINVAL; 1316 } 1317 1318 static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated) 1319 { 1320 u8 mask; 1321 1322 switch (dev->cmd_type) { 1323 case PORT100_CMD_TYPE_0: 1324 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK; 1325 break; 1326 case PORT100_CMD_TYPE_1: 1327 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK | 1328 PORT100_MDAA_TGT_WAS_ACTIVATED_MASK; 1329 break; 1330 default: 1331 nfc_err(&dev->interface->dev, "Unknown command type\n"); 1332 return false; 1333 } 1334 1335 return ((tgt_activated & mask) == mask); 1336 } 1337 1338 static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg, 1339 struct sk_buff *resp) 1340 { 1341 u32 status; 1342 struct port100_cb_arg *cb_arg = arg; 1343 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; 1344 struct port100_tg_comm_rf_res *hdr; 1345 1346 if (IS_ERR(resp)) 1347 goto exit; 1348 1349 hdr = (struct port100_tg_comm_rf_res *)resp->data; 1350 1351 status = le32_to_cpu(hdr->status); 1352 1353 if (cb_arg->mdaa && 1354 !port100_tg_target_activated(dev, hdr->target_activated)) { 1355 kfree_skb(resp); 1356 resp = ERR_PTR(-ETIMEDOUT); 1357 1358 goto exit; 1359 } 1360 1361 skb_pull(resp, sizeof(struct port100_tg_comm_rf_res)); 1362 1363 if (status != PORT100_CMD_STATUS_OK) { 1364 kfree_skb(resp); 1365 1366 if (status == PORT100_CMD_STATUS_TIMEOUT) 1367 resp = ERR_PTR(-ETIMEDOUT); 1368 else 1369 resp = ERR_PTR(-EIO); 1370 } 1371 1372 exit: 1373 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); 1374 1375 kfree(cb_arg); 1376 } 1377 1378 static int port100_tg_send_cmd(struct nfc_digital_dev *ddev, 1379 struct sk_buff *skb, u16 timeout, 1380 nfc_digital_cmd_complete_t cb, void *arg) 1381 { 1382 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1383 struct port100_tg_comm_rf_cmd *hdr; 1384 struct port100_cb_arg *cb_arg; 1385 1386 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1387 if (!cb_arg) 1388 return -ENOMEM; 1389 1390 cb_arg->complete_cb = cb; 1391 cb_arg->complete_arg = arg; 1392 1393 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd)); 1394 1395 hdr = (struct port100_tg_comm_rf_cmd *)skb->data; 1396 1397 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd)); 1398 hdr->guard_time = cpu_to_le16(500); 1399 hdr->send_timeout = cpu_to_le16(0xFFFF); 1400 hdr->recv_timeout = cpu_to_le16(timeout); 1401 1402 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb, 1403 port100_tg_comm_rf_complete, cb_arg); 1404 } 1405 1406 static int port100_listen_mdaa(struct nfc_digital_dev *ddev, 1407 struct digital_tg_mdaa_params *params, 1408 u16 timeout, 1409 nfc_digital_cmd_complete_t cb, void *arg) 1410 { 1411 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1412 struct port100_tg_comm_rf_cmd *hdr; 1413 struct port100_cb_arg *cb_arg; 1414 struct sk_buff *skb; 1415 int rc; 1416 1417 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, 1418 NFC_DIGITAL_RF_TECH_106A); 1419 if (rc) 1420 return rc; 1421 1422 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, 1423 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); 1424 if (rc) 1425 return rc; 1426 1427 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1428 if (!cb_arg) 1429 return -ENOMEM; 1430 1431 cb_arg->complete_cb = cb; 1432 cb_arg->complete_arg = arg; 1433 cb_arg->mdaa = 1; 1434 1435 skb = port100_alloc_skb(dev, 0); 1436 if (!skb) { 1437 kfree(cb_arg); 1438 return -ENOMEM; 1439 } 1440 1441 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd)); 1442 hdr = (struct port100_tg_comm_rf_cmd *)skb->data; 1443 1444 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd)); 1445 1446 hdr->guard_time = 0; 1447 hdr->send_timeout = cpu_to_le16(0xFFFF); 1448 hdr->mdaa = 1; 1449 hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF; 1450 hdr->nfca_param[1] = params->sens_res & 0xFF; 1451 memcpy(hdr->nfca_param + 2, params->nfcid1, 3); 1452 hdr->nfca_param[5] = params->sel_res; 1453 memcpy(hdr->nfcf_param, params->nfcid2, 8); 1454 hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF; 1455 hdr->nfcf_param[17] = params->sc & 0xFF; 1456 hdr->recv_timeout = cpu_to_le16(timeout); 1457 1458 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb, 1459 port100_tg_comm_rf_complete, cb_arg); 1460 } 1461 1462 static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout, 1463 nfc_digital_cmd_complete_t cb, void *arg) 1464 { 1465 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1466 struct sk_buff *skb; 1467 1468 skb = port100_alloc_skb(dev, 0); 1469 if (!skb) 1470 return -ENOMEM; 1471 1472 return port100_tg_send_cmd(ddev, skb, timeout, cb, arg); 1473 } 1474 1475 static struct nfc_digital_ops port100_digital_ops = { 1476 .in_configure_hw = port100_in_configure_hw, 1477 .in_send_cmd = port100_in_send_cmd, 1478 1479 .tg_listen_mdaa = port100_listen_mdaa, 1480 .tg_listen = port100_listen, 1481 .tg_configure_hw = port100_tg_configure_hw, 1482 .tg_send_cmd = port100_tg_send_cmd, 1483 1484 .switch_rf = port100_switch_rf, 1485 .abort_cmd = port100_abort_cmd, 1486 }; 1487 1488 static const struct usb_device_id port100_table[] = { 1489 { USB_DEVICE(SONY_VENDOR_ID, RCS380S_PRODUCT_ID), }, 1490 { USB_DEVICE(SONY_VENDOR_ID, RCS380P_PRODUCT_ID), }, 1491 { } 1492 }; 1493 MODULE_DEVICE_TABLE(usb, port100_table); 1494 1495 static int port100_probe(struct usb_interface *interface, 1496 const struct usb_device_id *id) 1497 { 1498 struct port100 *dev; 1499 int rc; 1500 struct usb_host_interface *iface_desc; 1501 struct usb_endpoint_descriptor *endpoint; 1502 int in_endpoint; 1503 int out_endpoint; 1504 u16 fw_version; 1505 u64 cmd_type_mask; 1506 int i; 1507 1508 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL); 1509 if (!dev) 1510 return -ENOMEM; 1511 1512 mutex_init(&dev->out_urb_lock); 1513 dev->udev = usb_get_dev(interface_to_usbdev(interface)); 1514 dev->interface = interface; 1515 usb_set_intfdata(interface, dev); 1516 1517 in_endpoint = out_endpoint = 0; 1518 iface_desc = interface->cur_altsetting; 1519 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 1520 endpoint = &iface_desc->endpoint[i].desc; 1521 1522 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) 1523 in_endpoint = endpoint->bEndpointAddress; 1524 1525 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) 1526 out_endpoint = endpoint->bEndpointAddress; 1527 } 1528 1529 if (!in_endpoint || !out_endpoint) { 1530 nfc_err(&interface->dev, 1531 "Could not find bulk-in or bulk-out endpoint\n"); 1532 rc = -ENODEV; 1533 goto error; 1534 } 1535 1536 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL); 1537 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL); 1538 1539 if (!dev->in_urb || !dev->out_urb) { 1540 nfc_err(&interface->dev, "Could not allocate USB URBs\n"); 1541 rc = -ENOMEM; 1542 goto error; 1543 } 1544 1545 usb_fill_bulk_urb(dev->in_urb, dev->udev, 1546 usb_rcvbulkpipe(dev->udev, in_endpoint), 1547 NULL, 0, NULL, dev); 1548 usb_fill_bulk_urb(dev->out_urb, dev->udev, 1549 usb_sndbulkpipe(dev->udev, out_endpoint), 1550 NULL, 0, port100_send_complete, dev); 1551 dev->out_urb->transfer_flags = URB_ZERO_PACKET; 1552 1553 dev->skb_headroom = PORT100_FRAME_HEADER_LEN + 1554 PORT100_COMM_RF_HEAD_MAX_LEN; 1555 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN; 1556 1557 init_completion(&dev->cmd_cancel_done); 1558 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete); 1559 1560 /* The first thing to do with the Port-100 is to set the command type 1561 * to be used. If supported we use command type 1. 0 otherwise. 1562 */ 1563 cmd_type_mask = port100_get_command_type_mask(dev); 1564 if (!cmd_type_mask) { 1565 nfc_err(&interface->dev, 1566 "Could not get supported command types\n"); 1567 rc = -ENODEV; 1568 goto error; 1569 } 1570 1571 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1)) 1572 dev->cmd_type = PORT100_CMD_TYPE_1; 1573 else 1574 dev->cmd_type = PORT100_CMD_TYPE_0; 1575 1576 rc = port100_set_command_type(dev, dev->cmd_type); 1577 if (rc) { 1578 nfc_err(&interface->dev, 1579 "The device does not support command type %u\n", 1580 dev->cmd_type); 1581 goto error; 1582 } 1583 1584 fw_version = port100_get_firmware_version(dev); 1585 if (!fw_version) 1586 nfc_err(&interface->dev, 1587 "Could not get device firmware version\n"); 1588 1589 nfc_info(&interface->dev, 1590 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n", 1591 (fw_version & 0xFF00) >> 8, fw_version & 0xFF); 1592 1593 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops, 1594 PORT100_PROTOCOLS, 1595 PORT100_CAPABILITIES, 1596 dev->skb_headroom, 1597 dev->skb_tailroom); 1598 if (!dev->nfc_digital_dev) { 1599 nfc_err(&interface->dev, 1600 "Could not allocate nfc_digital_dev\n"); 1601 rc = -ENOMEM; 1602 goto error; 1603 } 1604 1605 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev); 1606 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev); 1607 1608 rc = nfc_digital_register_device(dev->nfc_digital_dev); 1609 if (rc) { 1610 nfc_err(&interface->dev, 1611 "Could not register digital device\n"); 1612 goto free_nfc_dev; 1613 } 1614 1615 return 0; 1616 1617 free_nfc_dev: 1618 nfc_digital_free_device(dev->nfc_digital_dev); 1619 1620 error: 1621 usb_free_urb(dev->in_urb); 1622 usb_free_urb(dev->out_urb); 1623 usb_put_dev(dev->udev); 1624 1625 return rc; 1626 } 1627 1628 static void port100_disconnect(struct usb_interface *interface) 1629 { 1630 struct port100 *dev; 1631 1632 dev = usb_get_intfdata(interface); 1633 usb_set_intfdata(interface, NULL); 1634 1635 nfc_digital_unregister_device(dev->nfc_digital_dev); 1636 nfc_digital_free_device(dev->nfc_digital_dev); 1637 1638 usb_kill_urb(dev->in_urb); 1639 usb_kill_urb(dev->out_urb); 1640 1641 usb_free_urb(dev->in_urb); 1642 usb_free_urb(dev->out_urb); 1643 usb_put_dev(dev->udev); 1644 1645 kfree(dev->cmd); 1646 1647 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected\n"); 1648 } 1649 1650 static struct usb_driver port100_driver = { 1651 .name = "port100", 1652 .probe = port100_probe, 1653 .disconnect = port100_disconnect, 1654 .id_table = port100_table, 1655 }; 1656 1657 module_usb_driver(port100_driver); 1658 1659 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION); 1660 MODULE_VERSION(VERSION); 1661 MODULE_LICENSE("GPL"); 1662