1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Sony NFC Port-100 Series driver 4 * Copyright (c) 2013, Intel Corporation. 5 * 6 * Partly based/Inspired by Stephen Tiedemann's nfcpy 7 */ 8 9 #include <linux/module.h> 10 #include <linux/usb.h> 11 #include <net/nfc/digital.h> 12 13 #define VERSION "0.1" 14 15 #define SONY_VENDOR_ID 0x054c 16 #define RCS380S_PRODUCT_ID 0x06c1 17 #define RCS380P_PRODUCT_ID 0x06c3 18 19 #define PORT100_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \ 20 NFC_PROTO_MIFARE_MASK | \ 21 NFC_PROTO_FELICA_MASK | \ 22 NFC_PROTO_NFC_DEP_MASK | \ 23 NFC_PROTO_ISO14443_MASK | \ 24 NFC_PROTO_ISO14443_B_MASK) 25 26 #define PORT100_CAPABILITIES (NFC_DIGITAL_DRV_CAPS_IN_CRC | \ 27 NFC_DIGITAL_DRV_CAPS_TG_CRC) 28 29 /* Standard port100 frame definitions */ 30 #define PORT100_FRAME_HEADER_LEN (sizeof(struct port100_frame) \ 31 + 2) /* data[0] CC, data[1] SCC */ 32 #define PORT100_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/ 33 34 #define PORT100_COMM_RF_HEAD_MAX_LEN (sizeof(struct port100_tg_comm_rf_cmd)) 35 36 /* 37 * Max extended frame payload len, excluding CC and SCC 38 * which are already in PORT100_FRAME_HEADER_LEN. 39 */ 40 #define PORT100_FRAME_MAX_PAYLOAD_LEN 1001 41 42 #define PORT100_FRAME_ACK_SIZE 6 /* Preamble (1), SoPC (2), ACK Code (2), 43 Postamble (1) */ 44 static u8 ack_frame[PORT100_FRAME_ACK_SIZE] = { 45 0x00, 0x00, 0xff, 0x00, 0xff, 0x00 46 }; 47 48 #define PORT100_FRAME_CHECKSUM(f) (f->data[le16_to_cpu(f->datalen)]) 49 #define PORT100_FRAME_POSTAMBLE(f) (f->data[le16_to_cpu(f->datalen) + 1]) 50 51 /* start of frame */ 52 #define PORT100_FRAME_SOF 0x00FF 53 #define PORT100_FRAME_EXT 0xFFFF 54 #define PORT100_FRAME_ACK 0x00FF 55 56 /* Port-100 command: in or out */ 57 #define PORT100_FRAME_DIRECTION(f) (f->data[0]) /* CC */ 58 #define PORT100_FRAME_DIR_OUT 0xD6 59 #define PORT100_FRAME_DIR_IN 0xD7 60 61 /* Port-100 sub-command */ 62 #define PORT100_FRAME_CMD(f) (f->data[1]) /* SCC */ 63 64 #define PORT100_CMD_GET_FIRMWARE_VERSION 0x20 65 #define PORT100_CMD_GET_COMMAND_TYPE 0x28 66 #define PORT100_CMD_SET_COMMAND_TYPE 0x2A 67 68 #define PORT100_CMD_IN_SET_RF 0x00 69 #define PORT100_CMD_IN_SET_PROTOCOL 0x02 70 #define PORT100_CMD_IN_COMM_RF 0x04 71 72 #define PORT100_CMD_TG_SET_RF 0x40 73 #define PORT100_CMD_TG_SET_PROTOCOL 0x42 74 #define PORT100_CMD_TG_SET_RF_OFF 0x46 75 #define PORT100_CMD_TG_COMM_RF 0x48 76 77 #define PORT100_CMD_SWITCH_RF 0x06 78 79 #define PORT100_CMD_RESPONSE(cmd) (cmd + 1) 80 81 #define PORT100_CMD_TYPE_IS_SUPPORTED(mask, cmd_type) \ 82 ((mask) & (0x01 << (cmd_type))) 83 #define PORT100_CMD_TYPE_0 0 84 #define PORT100_CMD_TYPE_1 1 85 86 #define PORT100_CMD_STATUS_OK 0x00 87 #define PORT100_CMD_STATUS_TIMEOUT 0x80 88 89 #define PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK 0x01 90 #define PORT100_MDAA_TGT_WAS_ACTIVATED_MASK 0x02 91 92 struct port100; 93 94 typedef void (*port100_send_async_complete_t)(struct port100 *dev, void *arg, 95 struct sk_buff *resp); 96 97 /* 98 * Setting sets structure for in_set_rf command 99 * 100 * @in_*_set_number: Represent the entry indexes in the port-100 RF Base Table. 101 * This table contains multiple RF setting sets required for RF 102 * communication. 103 * 104 * @in_*_comm_type: Theses fields set the communication type to be used. 105 */ 106 struct port100_in_rf_setting { 107 u8 in_send_set_number; 108 u8 in_send_comm_type; 109 u8 in_recv_set_number; 110 u8 in_recv_comm_type; 111 } __packed; 112 113 #define PORT100_COMM_TYPE_IN_212F 0x01 114 #define PORT100_COMM_TYPE_IN_424F 0x02 115 #define PORT100_COMM_TYPE_IN_106A 0x03 116 #define PORT100_COMM_TYPE_IN_106B 0x07 117 118 static const struct port100_in_rf_setting in_rf_settings[] = { 119 [NFC_DIGITAL_RF_TECH_212F] = { 120 .in_send_set_number = 1, 121 .in_send_comm_type = PORT100_COMM_TYPE_IN_212F, 122 .in_recv_set_number = 15, 123 .in_recv_comm_type = PORT100_COMM_TYPE_IN_212F, 124 }, 125 [NFC_DIGITAL_RF_TECH_424F] = { 126 .in_send_set_number = 1, 127 .in_send_comm_type = PORT100_COMM_TYPE_IN_424F, 128 .in_recv_set_number = 15, 129 .in_recv_comm_type = PORT100_COMM_TYPE_IN_424F, 130 }, 131 [NFC_DIGITAL_RF_TECH_106A] = { 132 .in_send_set_number = 2, 133 .in_send_comm_type = PORT100_COMM_TYPE_IN_106A, 134 .in_recv_set_number = 15, 135 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106A, 136 }, 137 [NFC_DIGITAL_RF_TECH_106B] = { 138 .in_send_set_number = 3, 139 .in_send_comm_type = PORT100_COMM_TYPE_IN_106B, 140 .in_recv_set_number = 15, 141 .in_recv_comm_type = PORT100_COMM_TYPE_IN_106B, 142 }, 143 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */ 144 [NFC_DIGITAL_RF_TECH_LAST] = { 0 }, 145 }; 146 147 /** 148 * struct port100_tg_rf_setting - Setting sets structure for tg_set_rf command 149 * 150 * @tg_set_number: Represents the entry index in the port-100 RF Base Table. 151 * This table contains multiple RF setting sets required for RF 152 * communication. this field is used for both send and receive 153 * settings. 154 * 155 * @tg_comm_type: Sets the communication type to be used to send and receive 156 * data. 157 */ 158 struct port100_tg_rf_setting { 159 u8 tg_set_number; 160 u8 tg_comm_type; 161 } __packed; 162 163 #define PORT100_COMM_TYPE_TG_106A 0x0B 164 #define PORT100_COMM_TYPE_TG_212F 0x0C 165 #define PORT100_COMM_TYPE_TG_424F 0x0D 166 167 static const struct port100_tg_rf_setting tg_rf_settings[] = { 168 [NFC_DIGITAL_RF_TECH_106A] = { 169 .tg_set_number = 8, 170 .tg_comm_type = PORT100_COMM_TYPE_TG_106A, 171 }, 172 [NFC_DIGITAL_RF_TECH_212F] = { 173 .tg_set_number = 8, 174 .tg_comm_type = PORT100_COMM_TYPE_TG_212F, 175 }, 176 [NFC_DIGITAL_RF_TECH_424F] = { 177 .tg_set_number = 8, 178 .tg_comm_type = PORT100_COMM_TYPE_TG_424F, 179 }, 180 /* Ensures the array has NFC_DIGITAL_RF_TECH_LAST elements */ 181 [NFC_DIGITAL_RF_TECH_LAST] = { 0 }, 182 183 }; 184 185 #define PORT100_IN_PROT_INITIAL_GUARD_TIME 0x00 186 #define PORT100_IN_PROT_ADD_CRC 0x01 187 #define PORT100_IN_PROT_CHECK_CRC 0x02 188 #define PORT100_IN_PROT_MULTI_CARD 0x03 189 #define PORT100_IN_PROT_ADD_PARITY 0x04 190 #define PORT100_IN_PROT_CHECK_PARITY 0x05 191 #define PORT100_IN_PROT_BITWISE_AC_RECV_MODE 0x06 192 #define PORT100_IN_PROT_VALID_BIT_NUMBER 0x07 193 #define PORT100_IN_PROT_CRYPTO1 0x08 194 #define PORT100_IN_PROT_ADD_SOF 0x09 195 #define PORT100_IN_PROT_CHECK_SOF 0x0A 196 #define PORT100_IN_PROT_ADD_EOF 0x0B 197 #define PORT100_IN_PROT_CHECK_EOF 0x0C 198 #define PORT100_IN_PROT_DEAF_TIME 0x0E 199 #define PORT100_IN_PROT_CRM 0x0F 200 #define PORT100_IN_PROT_CRM_MIN_LEN 0x10 201 #define PORT100_IN_PROT_T1_TAG_FRAME 0x11 202 #define PORT100_IN_PROT_RFCA 0x12 203 #define PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR 0x13 204 #define PORT100_IN_PROT_END 0x14 205 206 #define PORT100_IN_MAX_NUM_PROTOCOLS 19 207 208 #define PORT100_TG_PROT_TU 0x00 209 #define PORT100_TG_PROT_RF_OFF 0x01 210 #define PORT100_TG_PROT_CRM 0x02 211 #define PORT100_TG_PROT_END 0x03 212 213 #define PORT100_TG_MAX_NUM_PROTOCOLS 3 214 215 struct port100_protocol { 216 u8 number; 217 u8 value; 218 } __packed; 219 220 static const struct port100_protocol 221 in_protocols[][PORT100_IN_MAX_NUM_PROTOCOLS + 1] = { 222 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = { 223 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 }, 224 { PORT100_IN_PROT_ADD_CRC, 0 }, 225 { PORT100_IN_PROT_CHECK_CRC, 0 }, 226 { PORT100_IN_PROT_MULTI_CARD, 0 }, 227 { PORT100_IN_PROT_ADD_PARITY, 0 }, 228 { PORT100_IN_PROT_CHECK_PARITY, 1 }, 229 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 230 { PORT100_IN_PROT_VALID_BIT_NUMBER, 7 }, 231 { PORT100_IN_PROT_CRYPTO1, 0 }, 232 { PORT100_IN_PROT_ADD_SOF, 0 }, 233 { PORT100_IN_PROT_CHECK_SOF, 0 }, 234 { PORT100_IN_PROT_ADD_EOF, 0 }, 235 { PORT100_IN_PROT_CHECK_EOF, 0 }, 236 { PORT100_IN_PROT_DEAF_TIME, 4 }, 237 { PORT100_IN_PROT_CRM, 0 }, 238 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 239 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 240 { PORT100_IN_PROT_RFCA, 0 }, 241 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 242 { PORT100_IN_PROT_END, 0 }, 243 }, 244 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = { 245 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 }, 246 { PORT100_IN_PROT_ADD_CRC, 0 }, 247 { PORT100_IN_PROT_CHECK_CRC, 0 }, 248 { PORT100_IN_PROT_MULTI_CARD, 0 }, 249 { PORT100_IN_PROT_ADD_PARITY, 1 }, 250 { PORT100_IN_PROT_CHECK_PARITY, 1 }, 251 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 252 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 253 { PORT100_IN_PROT_CRYPTO1, 0 }, 254 { PORT100_IN_PROT_ADD_SOF, 0 }, 255 { PORT100_IN_PROT_CHECK_SOF, 0 }, 256 { PORT100_IN_PROT_ADD_EOF, 0 }, 257 { PORT100_IN_PROT_CHECK_EOF, 0 }, 258 { PORT100_IN_PROT_DEAF_TIME, 4 }, 259 { PORT100_IN_PROT_CRM, 0 }, 260 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 261 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 262 { PORT100_IN_PROT_RFCA, 0 }, 263 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 264 { PORT100_IN_PROT_END, 0 }, 265 }, 266 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = { 267 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 6 }, 268 { PORT100_IN_PROT_ADD_CRC, 1 }, 269 { PORT100_IN_PROT_CHECK_CRC, 1 }, 270 { PORT100_IN_PROT_MULTI_CARD, 0 }, 271 { PORT100_IN_PROT_ADD_PARITY, 1 }, 272 { PORT100_IN_PROT_CHECK_PARITY, 1 }, 273 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 274 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 275 { PORT100_IN_PROT_CRYPTO1, 0 }, 276 { PORT100_IN_PROT_ADD_SOF, 0 }, 277 { PORT100_IN_PROT_CHECK_SOF, 0 }, 278 { PORT100_IN_PROT_ADD_EOF, 0 }, 279 { PORT100_IN_PROT_CHECK_EOF, 0 }, 280 { PORT100_IN_PROT_DEAF_TIME, 4 }, 281 { PORT100_IN_PROT_CRM, 0 }, 282 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 283 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 284 { PORT100_IN_PROT_RFCA, 0 }, 285 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 286 { PORT100_IN_PROT_END, 0 }, 287 }, 288 [NFC_DIGITAL_FRAMING_NFCA_T1T] = { 289 /* nfc_digital_framing_nfca_short */ 290 { PORT100_IN_PROT_ADD_CRC, 2 }, 291 { PORT100_IN_PROT_CHECK_CRC, 2 }, 292 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 293 { PORT100_IN_PROT_T1_TAG_FRAME, 2 }, 294 { PORT100_IN_PROT_END, 0 }, 295 }, 296 [NFC_DIGITAL_FRAMING_NFCA_T2T] = { 297 /* nfc_digital_framing_nfca_standard */ 298 { PORT100_IN_PROT_ADD_CRC, 1 }, 299 { PORT100_IN_PROT_CHECK_CRC, 0 }, 300 { PORT100_IN_PROT_END, 0 }, 301 }, 302 [NFC_DIGITAL_FRAMING_NFCA_T4T] = { 303 /* nfc_digital_framing_nfca_standard_with_crc_a */ 304 { PORT100_IN_PROT_END, 0 }, 305 }, 306 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = { 307 /* nfc_digital_framing_nfca_standard */ 308 { PORT100_IN_PROT_END, 0 }, 309 }, 310 [NFC_DIGITAL_FRAMING_NFCF] = { 311 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 }, 312 { PORT100_IN_PROT_ADD_CRC, 1 }, 313 { PORT100_IN_PROT_CHECK_CRC, 1 }, 314 { PORT100_IN_PROT_MULTI_CARD, 0 }, 315 { PORT100_IN_PROT_ADD_PARITY, 0 }, 316 { PORT100_IN_PROT_CHECK_PARITY, 0 }, 317 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 318 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 319 { PORT100_IN_PROT_CRYPTO1, 0 }, 320 { PORT100_IN_PROT_ADD_SOF, 0 }, 321 { PORT100_IN_PROT_CHECK_SOF, 0 }, 322 { PORT100_IN_PROT_ADD_EOF, 0 }, 323 { PORT100_IN_PROT_CHECK_EOF, 0 }, 324 { PORT100_IN_PROT_DEAF_TIME, 4 }, 325 { PORT100_IN_PROT_CRM, 0 }, 326 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 327 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 328 { PORT100_IN_PROT_RFCA, 0 }, 329 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 330 { PORT100_IN_PROT_END, 0 }, 331 }, 332 [NFC_DIGITAL_FRAMING_NFCF_T3T] = { 333 /* nfc_digital_framing_nfcf */ 334 { PORT100_IN_PROT_END, 0 }, 335 }, 336 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = { 337 /* nfc_digital_framing_nfcf */ 338 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 18 }, 339 { PORT100_IN_PROT_ADD_CRC, 1 }, 340 { PORT100_IN_PROT_CHECK_CRC, 1 }, 341 { PORT100_IN_PROT_MULTI_CARD, 0 }, 342 { PORT100_IN_PROT_ADD_PARITY, 0 }, 343 { PORT100_IN_PROT_CHECK_PARITY, 0 }, 344 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 345 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 346 { PORT100_IN_PROT_CRYPTO1, 0 }, 347 { PORT100_IN_PROT_ADD_SOF, 0 }, 348 { PORT100_IN_PROT_CHECK_SOF, 0 }, 349 { PORT100_IN_PROT_ADD_EOF, 0 }, 350 { PORT100_IN_PROT_CHECK_EOF, 0 }, 351 { PORT100_IN_PROT_DEAF_TIME, 4 }, 352 { PORT100_IN_PROT_CRM, 0 }, 353 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 354 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 355 { PORT100_IN_PROT_RFCA, 0 }, 356 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 357 { PORT100_IN_PROT_END, 0 }, 358 }, 359 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = { 360 { PORT100_IN_PROT_END, 0 }, 361 }, 362 [NFC_DIGITAL_FRAMING_NFCB] = { 363 { PORT100_IN_PROT_INITIAL_GUARD_TIME, 20 }, 364 { PORT100_IN_PROT_ADD_CRC, 1 }, 365 { PORT100_IN_PROT_CHECK_CRC, 1 }, 366 { PORT100_IN_PROT_MULTI_CARD, 0 }, 367 { PORT100_IN_PROT_ADD_PARITY, 0 }, 368 { PORT100_IN_PROT_CHECK_PARITY, 0 }, 369 { PORT100_IN_PROT_BITWISE_AC_RECV_MODE, 0 }, 370 { PORT100_IN_PROT_VALID_BIT_NUMBER, 8 }, 371 { PORT100_IN_PROT_CRYPTO1, 0 }, 372 { PORT100_IN_PROT_ADD_SOF, 1 }, 373 { PORT100_IN_PROT_CHECK_SOF, 1 }, 374 { PORT100_IN_PROT_ADD_EOF, 1 }, 375 { PORT100_IN_PROT_CHECK_EOF, 1 }, 376 { PORT100_IN_PROT_DEAF_TIME, 4 }, 377 { PORT100_IN_PROT_CRM, 0 }, 378 { PORT100_IN_PROT_CRM_MIN_LEN, 0 }, 379 { PORT100_IN_PROT_T1_TAG_FRAME, 0 }, 380 { PORT100_IN_PROT_RFCA, 0 }, 381 { PORT100_IN_PROT_GUARD_TIME_AT_INITIATOR, 6 }, 382 { PORT100_IN_PROT_END, 0 }, 383 }, 384 [NFC_DIGITAL_FRAMING_NFCB_T4T] = { 385 /* nfc_digital_framing_nfcb */ 386 { PORT100_IN_PROT_END, 0 }, 387 }, 388 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */ 389 [NFC_DIGITAL_FRAMING_LAST] = { 390 { PORT100_IN_PROT_END, 0 }, 391 }, 392 }; 393 394 static const struct port100_protocol 395 tg_protocols[][PORT100_TG_MAX_NUM_PROTOCOLS + 1] = { 396 [NFC_DIGITAL_FRAMING_NFCA_SHORT] = { 397 { PORT100_TG_PROT_END, 0 }, 398 }, 399 [NFC_DIGITAL_FRAMING_NFCA_STANDARD] = { 400 { PORT100_TG_PROT_END, 0 }, 401 }, 402 [NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A] = { 403 { PORT100_TG_PROT_END, 0 }, 404 }, 405 [NFC_DIGITAL_FRAMING_NFCA_T1T] = { 406 { PORT100_TG_PROT_END, 0 }, 407 }, 408 [NFC_DIGITAL_FRAMING_NFCA_T2T] = { 409 { PORT100_TG_PROT_END, 0 }, 410 }, 411 [NFC_DIGITAL_FRAMING_NFCA_NFC_DEP] = { 412 { PORT100_TG_PROT_TU, 1 }, 413 { PORT100_TG_PROT_RF_OFF, 0 }, 414 { PORT100_TG_PROT_CRM, 7 }, 415 { PORT100_TG_PROT_END, 0 }, 416 }, 417 [NFC_DIGITAL_FRAMING_NFCF] = { 418 { PORT100_TG_PROT_END, 0 }, 419 }, 420 [NFC_DIGITAL_FRAMING_NFCF_T3T] = { 421 { PORT100_TG_PROT_END, 0 }, 422 }, 423 [NFC_DIGITAL_FRAMING_NFCF_NFC_DEP] = { 424 { PORT100_TG_PROT_TU, 1 }, 425 { PORT100_TG_PROT_RF_OFF, 0 }, 426 { PORT100_TG_PROT_CRM, 7 }, 427 { PORT100_TG_PROT_END, 0 }, 428 }, 429 [NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED] = { 430 { PORT100_TG_PROT_RF_OFF, 1 }, 431 { PORT100_TG_PROT_END, 0 }, 432 }, 433 /* Ensures the array has NFC_DIGITAL_FRAMING_LAST elements */ 434 [NFC_DIGITAL_FRAMING_LAST] = { 435 { PORT100_TG_PROT_END, 0 }, 436 }, 437 }; 438 439 struct port100 { 440 struct nfc_digital_dev *nfc_digital_dev; 441 442 int skb_headroom; 443 int skb_tailroom; 444 445 struct usb_device *udev; 446 struct usb_interface *interface; 447 448 struct urb *out_urb; 449 struct urb *in_urb; 450 451 /* This mutex protects the out_urb and avoids to submit a new command 452 * through port100_send_frame_async() while the previous one is being 453 * canceled through port100_abort_cmd(). 454 */ 455 struct mutex out_urb_lock; 456 457 struct work_struct cmd_complete_work; 458 459 u8 cmd_type; 460 461 /* The digital stack serializes commands to be sent. There is no need 462 * for any queuing/locking mechanism at driver level. 463 */ 464 struct port100_cmd *cmd; 465 466 bool cmd_cancel; 467 struct completion cmd_cancel_done; 468 }; 469 470 struct port100_cmd { 471 u8 code; 472 int status; 473 struct sk_buff *req; 474 struct sk_buff *resp; 475 int resp_len; 476 port100_send_async_complete_t complete_cb; 477 void *complete_cb_context; 478 }; 479 480 struct port100_frame { 481 u8 preamble; 482 __be16 start_frame; 483 __be16 extended_frame; 484 __le16 datalen; 485 u8 datalen_checksum; 486 u8 data[]; 487 } __packed; 488 489 struct port100_ack_frame { 490 u8 preamble; 491 __be16 start_frame; 492 __be16 ack_frame; 493 u8 postambule; 494 } __packed; 495 496 struct port100_cb_arg { 497 nfc_digital_cmd_complete_t complete_cb; 498 void *complete_arg; 499 u8 mdaa; 500 }; 501 502 struct port100_tg_comm_rf_cmd { 503 __le16 guard_time; 504 __le16 send_timeout; 505 u8 mdaa; 506 u8 nfca_param[6]; 507 u8 nfcf_param[18]; 508 u8 mf_halted; 509 u8 arae_flag; 510 __le16 recv_timeout; 511 u8 data[]; 512 } __packed; 513 514 struct port100_tg_comm_rf_res { 515 u8 comm_type; 516 u8 ar_status; 517 u8 target_activated; 518 __le32 status; 519 u8 data[]; 520 } __packed; 521 522 /* The rule: value + checksum = 0 */ 523 static inline u8 port100_checksum(u16 value) 524 { 525 return ~(((u8 *)&value)[0] + ((u8 *)&value)[1]) + 1; 526 } 527 528 /* The rule: sum(data elements) + checksum = 0 */ 529 static u8 port100_data_checksum(const u8 *data, int datalen) 530 { 531 u8 sum = 0; 532 int i; 533 534 for (i = 0; i < datalen; i++) 535 sum += data[i]; 536 537 return port100_checksum(sum); 538 } 539 540 static void port100_tx_frame_init(void *_frame, u8 cmd_code) 541 { 542 struct port100_frame *frame = _frame; 543 544 frame->preamble = 0; 545 frame->start_frame = cpu_to_be16(PORT100_FRAME_SOF); 546 frame->extended_frame = cpu_to_be16(PORT100_FRAME_EXT); 547 PORT100_FRAME_DIRECTION(frame) = PORT100_FRAME_DIR_OUT; 548 PORT100_FRAME_CMD(frame) = cmd_code; 549 frame->datalen = cpu_to_le16(2); 550 } 551 552 static void port100_tx_frame_finish(void *_frame) 553 { 554 struct port100_frame *frame = _frame; 555 556 frame->datalen_checksum = port100_checksum(le16_to_cpu(frame->datalen)); 557 558 PORT100_FRAME_CHECKSUM(frame) = 559 port100_data_checksum(frame->data, le16_to_cpu(frame->datalen)); 560 561 PORT100_FRAME_POSTAMBLE(frame) = 0; 562 } 563 564 static void port100_tx_update_payload_len(void *_frame, int len) 565 { 566 struct port100_frame *frame = _frame; 567 568 le16_add_cpu(&frame->datalen, len); 569 } 570 571 static bool port100_rx_frame_is_valid(const void *_frame) 572 { 573 u8 checksum; 574 const struct port100_frame *frame = _frame; 575 576 if (frame->start_frame != cpu_to_be16(PORT100_FRAME_SOF) || 577 frame->extended_frame != cpu_to_be16(PORT100_FRAME_EXT)) 578 return false; 579 580 checksum = port100_checksum(le16_to_cpu(frame->datalen)); 581 if (checksum != frame->datalen_checksum) 582 return false; 583 584 checksum = port100_data_checksum(frame->data, 585 le16_to_cpu(frame->datalen)); 586 if (checksum != PORT100_FRAME_CHECKSUM(frame)) 587 return false; 588 589 return true; 590 } 591 592 static bool port100_rx_frame_is_ack(const struct port100_ack_frame *frame) 593 { 594 return (frame->start_frame == cpu_to_be16(PORT100_FRAME_SOF) && 595 frame->ack_frame == cpu_to_be16(PORT100_FRAME_ACK)); 596 } 597 598 static inline int port100_rx_frame_size(const void *frame) 599 { 600 const struct port100_frame *f = frame; 601 602 return sizeof(struct port100_frame) + le16_to_cpu(f->datalen) + 603 PORT100_FRAME_TAIL_LEN; 604 } 605 606 static bool port100_rx_frame_is_cmd_response(const struct port100 *dev, 607 const void *frame) 608 { 609 const struct port100_frame *f = frame; 610 611 return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code)); 612 } 613 614 static void port100_recv_response(struct urb *urb) 615 { 616 struct port100 *dev = urb->context; 617 struct port100_cmd *cmd = dev->cmd; 618 u8 *in_frame; 619 620 cmd->status = urb->status; 621 622 switch (urb->status) { 623 case 0: 624 break; /* success */ 625 case -ECONNRESET: 626 case -ENOENT: 627 nfc_dbg(&dev->interface->dev, 628 "The urb has been canceled (status %d)\n", urb->status); 629 goto sched_wq; 630 case -ESHUTDOWN: 631 default: 632 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 633 urb->status); 634 goto sched_wq; 635 } 636 637 in_frame = dev->in_urb->transfer_buffer; 638 639 if (urb->actual_length < PORT100_FRAME_HEADER_LEN || 640 urb->actual_length < port100_rx_frame_size(in_frame)) { 641 nfc_err(&dev->interface->dev, "Received a truncated frame\n"); 642 cmd->status = -EIO; 643 goto sched_wq; 644 } 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(const struct port100 *dev, 667 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 const 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_dbg(&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(const 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, 766 const struct sk_buff *out, 767 const struct sk_buff *in, int in_len) 768 { 769 int rc; 770 771 mutex_lock(&dev->out_urb_lock); 772 773 /* A command cancel frame as been sent through dev->out_urb. Don't try 774 * to submit a new one. 775 */ 776 if (dev->cmd_cancel) { 777 rc = -EAGAIN; 778 goto exit; 779 } 780 781 dev->out_urb->transfer_buffer = out->data; 782 dev->out_urb->transfer_buffer_length = out->len; 783 784 dev->in_urb->transfer_buffer = in->data; 785 dev->in_urb->transfer_buffer_length = in_len; 786 787 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1, 788 out->data, out->len, false); 789 790 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL); 791 if (rc) 792 goto exit; 793 794 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL); 795 if (rc) 796 usb_kill_urb(dev->out_urb); 797 798 exit: 799 mutex_unlock(&dev->out_urb_lock); 800 801 return rc; 802 } 803 804 static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code, 805 struct sk_buff *skb) 806 { 807 /* payload is already there, just update datalen */ 808 int payload_len = skb->len; 809 810 skb_push(skb, PORT100_FRAME_HEADER_LEN); 811 skb_put(skb, PORT100_FRAME_TAIL_LEN); 812 813 port100_tx_frame_init(skb->data, cmd_code); 814 port100_tx_update_payload_len(skb->data, payload_len); 815 port100_tx_frame_finish(skb->data); 816 } 817 818 static void port100_send_async_complete(struct port100 *dev) 819 { 820 struct port100_cmd *cmd = dev->cmd; 821 int status = cmd->status; 822 823 struct sk_buff *req = cmd->req; 824 struct sk_buff *resp = cmd->resp; 825 826 dev_kfree_skb(req); 827 828 dev->cmd = NULL; 829 830 if (status < 0) { 831 cmd->complete_cb(dev, cmd->complete_cb_context, 832 ERR_PTR(status)); 833 dev_kfree_skb(resp); 834 goto done; 835 } 836 837 skb_put(resp, port100_rx_frame_size(resp->data)); 838 skb_pull(resp, PORT100_FRAME_HEADER_LEN); 839 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN); 840 841 cmd->complete_cb(dev, cmd->complete_cb_context, resp); 842 843 done: 844 kfree(cmd); 845 } 846 847 static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code, 848 struct sk_buff *req, 849 port100_send_async_complete_t complete_cb, 850 void *complete_cb_context) 851 { 852 struct port100_cmd *cmd; 853 struct sk_buff *resp; 854 int rc; 855 int resp_len = PORT100_FRAME_HEADER_LEN + 856 PORT100_FRAME_MAX_PAYLOAD_LEN + 857 PORT100_FRAME_TAIL_LEN; 858 859 if (dev->cmd) { 860 nfc_err(&dev->interface->dev, 861 "A command is still in process\n"); 862 return -EBUSY; 863 } 864 865 resp = alloc_skb(resp_len, GFP_KERNEL); 866 if (!resp) 867 return -ENOMEM; 868 869 cmd = kzalloc_obj(*cmd); 870 if (!cmd) { 871 dev_kfree_skb(resp); 872 return -ENOMEM; 873 } 874 875 cmd->code = cmd_code; 876 cmd->req = req; 877 cmd->resp = resp; 878 cmd->resp_len = resp_len; 879 cmd->complete_cb = complete_cb; 880 cmd->complete_cb_context = complete_cb_context; 881 882 port100_build_cmd_frame(dev, cmd_code, req); 883 884 dev->cmd = cmd; 885 886 rc = port100_send_frame_async(dev, req, resp, resp_len); 887 if (rc) { 888 kfree(cmd); 889 dev_kfree_skb(resp); 890 dev->cmd = NULL; 891 } 892 893 return rc; 894 } 895 896 struct port100_sync_cmd_response { 897 struct sk_buff *resp; 898 struct completion done; 899 }; 900 901 static void port100_wq_cmd_complete(struct work_struct *work) 902 { 903 struct port100 *dev = container_of(work, struct port100, 904 cmd_complete_work); 905 906 port100_send_async_complete(dev); 907 } 908 909 static void port100_send_sync_complete(struct port100 *dev, void *_arg, 910 struct sk_buff *resp) 911 { 912 struct port100_sync_cmd_response *arg = _arg; 913 914 arg->resp = resp; 915 complete(&arg->done); 916 } 917 918 static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code, 919 struct sk_buff *req) 920 { 921 int rc; 922 struct port100_sync_cmd_response arg; 923 924 init_completion(&arg.done); 925 926 rc = port100_send_cmd_async(dev, cmd_code, req, 927 port100_send_sync_complete, &arg); 928 if (rc) { 929 dev_kfree_skb(req); 930 return ERR_PTR(rc); 931 } 932 933 wait_for_completion(&arg.done); 934 935 return arg.resp; 936 } 937 938 static void port100_send_complete(struct urb *urb) 939 { 940 struct port100 *dev = urb->context; 941 942 if (dev->cmd_cancel) { 943 complete_all(&dev->cmd_cancel_done); 944 dev->cmd_cancel = false; 945 } 946 947 switch (urb->status) { 948 case 0: 949 break; /* success */ 950 case -ECONNRESET: 951 case -ENOENT: 952 nfc_dbg(&dev->interface->dev, 953 "The urb has been stopped (status %d)\n", urb->status); 954 break; 955 case -ESHUTDOWN: 956 default: 957 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 958 urb->status); 959 } 960 } 961 962 static void port100_abort_cmd(struct nfc_digital_dev *ddev) 963 { 964 struct port100 *dev = nfc_digital_get_drvdata(ddev); 965 966 /* An ack will cancel the last issued command */ 967 port100_send_ack(dev); 968 969 /* cancel the urb request */ 970 usb_kill_urb(dev->in_urb); 971 } 972 973 static struct sk_buff *port100_alloc_skb(const struct port100 *dev, unsigned int size) 974 { 975 struct sk_buff *skb; 976 977 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size, 978 GFP_KERNEL); 979 if (skb) 980 skb_reserve(skb, dev->skb_headroom); 981 982 return skb; 983 } 984 985 static int port100_set_command_type(struct port100 *dev, u8 command_type) 986 { 987 struct sk_buff *skb; 988 struct sk_buff *resp; 989 int rc; 990 991 skb = port100_alloc_skb(dev, 1); 992 if (!skb) 993 return -ENOMEM; 994 995 skb_put_u8(skb, command_type); 996 997 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb); 998 if (IS_ERR(resp)) 999 return PTR_ERR(resp); 1000 1001 rc = resp->data[0]; 1002 1003 dev_kfree_skb(resp); 1004 1005 return rc; 1006 } 1007 1008 static u64 port100_get_command_type_mask(struct port100 *dev) 1009 { 1010 struct sk_buff *skb; 1011 struct sk_buff *resp; 1012 u64 mask; 1013 1014 skb = port100_alloc_skb(dev, 0); 1015 if (!skb) 1016 return 0; 1017 1018 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb); 1019 if (IS_ERR(resp)) 1020 return 0; 1021 1022 if (resp->len < 8) 1023 mask = 0; 1024 else 1025 mask = be64_to_cpu(*(__be64 *)resp->data); 1026 1027 dev_kfree_skb(resp); 1028 1029 return mask; 1030 } 1031 1032 static u16 port100_get_firmware_version(struct port100 *dev) 1033 { 1034 struct sk_buff *skb; 1035 struct sk_buff *resp; 1036 u16 fw_ver; 1037 1038 skb = port100_alloc_skb(dev, 0); 1039 if (!skb) 1040 return 0; 1041 1042 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION, 1043 skb); 1044 if (IS_ERR(resp)) 1045 return 0; 1046 1047 fw_ver = le16_to_cpu(*(__le16 *)resp->data); 1048 1049 dev_kfree_skb(resp); 1050 1051 return fw_ver; 1052 } 1053 1054 static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on) 1055 { 1056 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1057 struct sk_buff *skb, *resp; 1058 1059 skb = port100_alloc_skb(dev, 1); 1060 if (!skb) 1061 return -ENOMEM; 1062 1063 skb_put_u8(skb, on ? 1 : 0); 1064 1065 /* Cancel the last command if the device is being switched off */ 1066 if (!on) 1067 port100_abort_cmd(ddev); 1068 1069 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb); 1070 1071 if (IS_ERR(resp)) 1072 return PTR_ERR(resp); 1073 1074 dev_kfree_skb(resp); 1075 1076 return 0; 1077 } 1078 1079 static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf) 1080 { 1081 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1082 struct sk_buff *skb; 1083 struct sk_buff *resp; 1084 int rc; 1085 1086 if (rf >= NFC_DIGITAL_RF_TECH_LAST) 1087 return -EINVAL; 1088 1089 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting)); 1090 if (!skb) 1091 return -ENOMEM; 1092 1093 skb_put_data(skb, &in_rf_settings[rf], 1094 sizeof(struct port100_in_rf_setting)); 1095 1096 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb); 1097 1098 if (IS_ERR(resp)) 1099 return PTR_ERR(resp); 1100 1101 rc = resp->data[0]; 1102 1103 dev_kfree_skb(resp); 1104 1105 return rc; 1106 } 1107 1108 static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param) 1109 { 1110 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1111 const struct port100_protocol *protocols; 1112 struct sk_buff *skb; 1113 struct sk_buff *resp; 1114 int num_protocols; 1115 size_t size; 1116 int rc; 1117 1118 if (param >= NFC_DIGITAL_FRAMING_LAST) 1119 return -EINVAL; 1120 1121 protocols = in_protocols[param]; 1122 1123 num_protocols = 0; 1124 while (protocols[num_protocols].number != PORT100_IN_PROT_END) 1125 num_protocols++; 1126 1127 if (!num_protocols) 1128 return 0; 1129 1130 size = sizeof(struct port100_protocol) * num_protocols; 1131 1132 skb = port100_alloc_skb(dev, size); 1133 if (!skb) 1134 return -ENOMEM; 1135 1136 skb_put_data(skb, protocols, size); 1137 1138 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb); 1139 1140 if (IS_ERR(resp)) 1141 return PTR_ERR(resp); 1142 1143 rc = resp->data[0]; 1144 1145 dev_kfree_skb(resp); 1146 1147 return rc; 1148 } 1149 1150 static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type, 1151 int param) 1152 { 1153 if (type == NFC_DIGITAL_CONFIG_RF_TECH) 1154 return port100_in_set_rf(ddev, param); 1155 1156 if (type == NFC_DIGITAL_CONFIG_FRAMING) 1157 return port100_in_set_framing(ddev, param); 1158 1159 return -EINVAL; 1160 } 1161 1162 static void port100_in_comm_rf_complete(struct port100 *dev, void *arg, 1163 struct sk_buff *resp) 1164 { 1165 const struct port100_cb_arg *cb_arg = arg; 1166 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; 1167 u32 status; 1168 int rc; 1169 1170 if (IS_ERR(resp)) { 1171 rc = PTR_ERR(resp); 1172 goto exit; 1173 } 1174 1175 if (resp->len < 4) { 1176 nfc_err(&dev->interface->dev, 1177 "Invalid packet length received\n"); 1178 rc = -EIO; 1179 goto error; 1180 } 1181 1182 status = le32_to_cpu(*(__le32 *)resp->data); 1183 1184 skb_pull(resp, sizeof(u32)); 1185 1186 if (status == PORT100_CMD_STATUS_TIMEOUT) { 1187 rc = -ETIMEDOUT; 1188 goto error; 1189 } 1190 1191 if (status != PORT100_CMD_STATUS_OK) { 1192 nfc_err(&dev->interface->dev, 1193 "in_comm_rf failed with status 0x%08x\n", status); 1194 rc = -EIO; 1195 goto error; 1196 } 1197 1198 /* Remove collision bits byte */ 1199 skb_pull(resp, 1); 1200 1201 goto exit; 1202 1203 error: 1204 kfree_skb(resp); 1205 resp = ERR_PTR(rc); 1206 1207 exit: 1208 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); 1209 1210 kfree(cb_arg); 1211 } 1212 1213 static int port100_in_send_cmd(struct nfc_digital_dev *ddev, 1214 struct sk_buff *skb, u16 _timeout, 1215 nfc_digital_cmd_complete_t cb, void *arg) 1216 { 1217 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1218 struct port100_cb_arg *cb_arg; 1219 __le16 timeout; 1220 1221 cb_arg = kzalloc_obj(struct port100_cb_arg); 1222 if (!cb_arg) 1223 return -ENOMEM; 1224 1225 cb_arg->complete_cb = cb; 1226 cb_arg->complete_arg = arg; 1227 1228 timeout = cpu_to_le16(_timeout * 10); 1229 1230 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16)); 1231 1232 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb, 1233 port100_in_comm_rf_complete, cb_arg); 1234 } 1235 1236 static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf) 1237 { 1238 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1239 struct sk_buff *skb; 1240 struct sk_buff *resp; 1241 int rc; 1242 1243 if (rf >= NFC_DIGITAL_RF_TECH_LAST) 1244 return -EINVAL; 1245 1246 skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting)); 1247 if (!skb) 1248 return -ENOMEM; 1249 1250 skb_put_data(skb, &tg_rf_settings[rf], 1251 sizeof(struct port100_tg_rf_setting)); 1252 1253 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb); 1254 1255 if (IS_ERR(resp)) 1256 return PTR_ERR(resp); 1257 1258 rc = resp->data[0]; 1259 1260 dev_kfree_skb(resp); 1261 1262 return rc; 1263 } 1264 1265 static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param) 1266 { 1267 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1268 const struct port100_protocol *protocols; 1269 struct sk_buff *skb; 1270 struct sk_buff *resp; 1271 int rc; 1272 int num_protocols; 1273 size_t size; 1274 1275 if (param >= NFC_DIGITAL_FRAMING_LAST) 1276 return -EINVAL; 1277 1278 protocols = tg_protocols[param]; 1279 1280 num_protocols = 0; 1281 while (protocols[num_protocols].number != PORT100_TG_PROT_END) 1282 num_protocols++; 1283 1284 if (!num_protocols) 1285 return 0; 1286 1287 size = sizeof(struct port100_protocol) * num_protocols; 1288 1289 skb = port100_alloc_skb(dev, size); 1290 if (!skb) 1291 return -ENOMEM; 1292 1293 skb_put_data(skb, protocols, size); 1294 1295 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb); 1296 1297 if (IS_ERR(resp)) 1298 return PTR_ERR(resp); 1299 1300 rc = resp->data[0]; 1301 1302 dev_kfree_skb(resp); 1303 1304 return rc; 1305 } 1306 1307 static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type, 1308 int param) 1309 { 1310 if (type == NFC_DIGITAL_CONFIG_RF_TECH) 1311 return port100_tg_set_rf(ddev, param); 1312 1313 if (type == NFC_DIGITAL_CONFIG_FRAMING) 1314 return port100_tg_set_framing(ddev, param); 1315 1316 return -EINVAL; 1317 } 1318 1319 static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated) 1320 { 1321 u8 mask; 1322 1323 switch (dev->cmd_type) { 1324 case PORT100_CMD_TYPE_0: 1325 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK; 1326 break; 1327 case PORT100_CMD_TYPE_1: 1328 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK | 1329 PORT100_MDAA_TGT_WAS_ACTIVATED_MASK; 1330 break; 1331 default: 1332 nfc_err(&dev->interface->dev, "Unknown command type\n"); 1333 return false; 1334 } 1335 1336 return ((tgt_activated & mask) == mask); 1337 } 1338 1339 static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg, 1340 struct sk_buff *resp) 1341 { 1342 u32 status; 1343 const struct port100_cb_arg *cb_arg = arg; 1344 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; 1345 struct port100_tg_comm_rf_res *hdr; 1346 1347 if (IS_ERR(resp)) 1348 goto exit; 1349 1350 hdr = (struct port100_tg_comm_rf_res *)resp->data; 1351 1352 status = le32_to_cpu(hdr->status); 1353 1354 if (cb_arg->mdaa && 1355 !port100_tg_target_activated(dev, hdr->target_activated)) { 1356 kfree_skb(resp); 1357 resp = ERR_PTR(-ETIMEDOUT); 1358 1359 goto exit; 1360 } 1361 1362 skb_pull(resp, sizeof(struct port100_tg_comm_rf_res)); 1363 1364 if (status != PORT100_CMD_STATUS_OK) { 1365 kfree_skb(resp); 1366 1367 if (status == PORT100_CMD_STATUS_TIMEOUT) 1368 resp = ERR_PTR(-ETIMEDOUT); 1369 else 1370 resp = ERR_PTR(-EIO); 1371 } 1372 1373 exit: 1374 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); 1375 1376 kfree(cb_arg); 1377 } 1378 1379 static int port100_tg_send_cmd(struct nfc_digital_dev *ddev, 1380 struct sk_buff *skb, u16 timeout, 1381 nfc_digital_cmd_complete_t cb, void *arg) 1382 { 1383 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1384 struct port100_tg_comm_rf_cmd *hdr; 1385 struct port100_cb_arg *cb_arg; 1386 1387 cb_arg = kzalloc_obj(struct port100_cb_arg); 1388 if (!cb_arg) 1389 return -ENOMEM; 1390 1391 cb_arg->complete_cb = cb; 1392 cb_arg->complete_arg = arg; 1393 1394 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd)); 1395 1396 hdr = (struct port100_tg_comm_rf_cmd *)skb->data; 1397 1398 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd)); 1399 hdr->guard_time = cpu_to_le16(500); 1400 hdr->send_timeout = cpu_to_le16(0xFFFF); 1401 hdr->recv_timeout = cpu_to_le16(timeout); 1402 1403 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb, 1404 port100_tg_comm_rf_complete, cb_arg); 1405 } 1406 1407 static int port100_listen_mdaa(struct nfc_digital_dev *ddev, 1408 struct digital_tg_mdaa_params *params, 1409 u16 timeout, 1410 nfc_digital_cmd_complete_t cb, void *arg) 1411 { 1412 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1413 struct port100_tg_comm_rf_cmd *hdr; 1414 struct port100_cb_arg *cb_arg; 1415 struct sk_buff *skb; 1416 int rc; 1417 1418 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, 1419 NFC_DIGITAL_RF_TECH_106A); 1420 if (rc) 1421 return rc; 1422 1423 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, 1424 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); 1425 if (rc) 1426 return rc; 1427 1428 cb_arg = kzalloc_obj(struct port100_cb_arg); 1429 if (!cb_arg) 1430 return -ENOMEM; 1431 1432 cb_arg->complete_cb = cb; 1433 cb_arg->complete_arg = arg; 1434 cb_arg->mdaa = 1; 1435 1436 skb = port100_alloc_skb(dev, 0); 1437 if (!skb) { 1438 kfree(cb_arg); 1439 return -ENOMEM; 1440 } 1441 1442 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd)); 1443 hdr = (struct port100_tg_comm_rf_cmd *)skb->data; 1444 1445 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd)); 1446 1447 hdr->guard_time = 0; 1448 hdr->send_timeout = cpu_to_le16(0xFFFF); 1449 hdr->mdaa = 1; 1450 hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF; 1451 hdr->nfca_param[1] = params->sens_res & 0xFF; 1452 memcpy(hdr->nfca_param + 2, params->nfcid1, 3); 1453 hdr->nfca_param[5] = params->sel_res; 1454 memcpy(hdr->nfcf_param, params->nfcid2, 8); 1455 hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF; 1456 hdr->nfcf_param[17] = params->sc & 0xFF; 1457 hdr->recv_timeout = cpu_to_le16(timeout); 1458 1459 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb, 1460 port100_tg_comm_rf_complete, cb_arg); 1461 } 1462 1463 static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout, 1464 nfc_digital_cmd_complete_t cb, void *arg) 1465 { 1466 const struct port100 *dev = nfc_digital_get_drvdata(ddev); 1467 struct sk_buff *skb; 1468 1469 skb = port100_alloc_skb(dev, 0); 1470 if (!skb) 1471 return -ENOMEM; 1472 1473 return port100_tg_send_cmd(ddev, skb, timeout, cb, arg); 1474 } 1475 1476 static const struct nfc_digital_ops port100_digital_ops = { 1477 .in_configure_hw = port100_in_configure_hw, 1478 .in_send_cmd = port100_in_send_cmd, 1479 1480 .tg_listen_mdaa = port100_listen_mdaa, 1481 .tg_listen = port100_listen, 1482 .tg_configure_hw = port100_tg_configure_hw, 1483 .tg_send_cmd = port100_tg_send_cmd, 1484 1485 .switch_rf = port100_switch_rf, 1486 .abort_cmd = port100_abort_cmd, 1487 }; 1488 1489 static const struct usb_device_id port100_table[] = { 1490 { USB_DEVICE(SONY_VENDOR_ID, RCS380S_PRODUCT_ID) }, 1491 { USB_DEVICE(SONY_VENDOR_ID, RCS380P_PRODUCT_ID) }, 1492 { } 1493 }; 1494 MODULE_DEVICE_TABLE(usb, port100_table); 1495 1496 static int port100_probe(struct usb_interface *interface, 1497 const struct usb_device_id *id) 1498 { 1499 struct usb_endpoint_descriptor *ep_in, *ep_out; 1500 struct port100 *dev; 1501 int rc; 1502 u16 fw_version; 1503 u64 cmd_type_mask; 1504 1505 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL); 1506 if (!dev) 1507 return -ENOMEM; 1508 1509 mutex_init(&dev->out_urb_lock); 1510 dev->udev = interface_to_usbdev(interface); 1511 dev->interface = interface; 1512 usb_set_intfdata(interface, dev); 1513 1514 rc = usb_find_common_endpoints(interface->cur_altsetting, &ep_in, 1515 &ep_out, NULL, NULL); 1516 if (rc) { 1517 nfc_err(&interface->dev, 1518 "Could not find bulk-in or bulk-out endpoint\n"); 1519 goto error; 1520 } 1521 1522 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL); 1523 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL); 1524 1525 if (!dev->in_urb || !dev->out_urb) { 1526 nfc_err(&interface->dev, "Could not allocate USB URBs\n"); 1527 rc = -ENOMEM; 1528 goto error; 1529 } 1530 1531 usb_fill_bulk_urb(dev->in_urb, dev->udev, 1532 usb_rcvbulkpipe(dev->udev, usb_endpoint_num(ep_in)), 1533 NULL, 0, NULL, dev); 1534 usb_fill_bulk_urb(dev->out_urb, dev->udev, 1535 usb_sndbulkpipe(dev->udev, usb_endpoint_num(ep_out)), 1536 NULL, 0, port100_send_complete, dev); 1537 dev->out_urb->transfer_flags = URB_ZERO_PACKET; 1538 1539 dev->skb_headroom = PORT100_FRAME_HEADER_LEN + 1540 PORT100_COMM_RF_HEAD_MAX_LEN; 1541 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN; 1542 1543 init_completion(&dev->cmd_cancel_done); 1544 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete); 1545 1546 /* The first thing to do with the Port-100 is to set the command type 1547 * to be used. If supported we use command type 1. 0 otherwise. 1548 */ 1549 cmd_type_mask = port100_get_command_type_mask(dev); 1550 if (!cmd_type_mask) { 1551 nfc_err(&interface->dev, 1552 "Could not get supported command types\n"); 1553 rc = -ENODEV; 1554 goto error; 1555 } 1556 1557 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1)) 1558 dev->cmd_type = PORT100_CMD_TYPE_1; 1559 else 1560 dev->cmd_type = PORT100_CMD_TYPE_0; 1561 1562 rc = port100_set_command_type(dev, dev->cmd_type); 1563 if (rc) { 1564 nfc_err(&interface->dev, 1565 "The device does not support command type %u\n", 1566 dev->cmd_type); 1567 goto error; 1568 } 1569 1570 fw_version = port100_get_firmware_version(dev); 1571 if (!fw_version) 1572 nfc_err(&interface->dev, 1573 "Could not get device firmware version\n"); 1574 1575 nfc_info(&interface->dev, 1576 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n", 1577 (fw_version & 0xFF00) >> 8, fw_version & 0xFF); 1578 1579 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops, 1580 PORT100_PROTOCOLS, 1581 PORT100_CAPABILITIES, 1582 dev->skb_headroom, 1583 dev->skb_tailroom); 1584 if (!dev->nfc_digital_dev) { 1585 nfc_err(&interface->dev, 1586 "Could not allocate nfc_digital_dev\n"); 1587 rc = -ENOMEM; 1588 goto error; 1589 } 1590 1591 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev); 1592 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev); 1593 1594 rc = nfc_digital_register_device(dev->nfc_digital_dev); 1595 if (rc) { 1596 nfc_err(&interface->dev, 1597 "Could not register digital device\n"); 1598 goto free_nfc_dev; 1599 } 1600 1601 return 0; 1602 1603 free_nfc_dev: 1604 nfc_digital_free_device(dev->nfc_digital_dev); 1605 1606 error: 1607 usb_kill_urb(dev->in_urb); 1608 usb_free_urb(dev->in_urb); 1609 usb_kill_urb(dev->out_urb); 1610 usb_free_urb(dev->out_urb); 1611 1612 return rc; 1613 } 1614 1615 static void port100_disconnect(struct usb_interface *interface) 1616 { 1617 struct port100 *dev; 1618 1619 dev = usb_get_intfdata(interface); 1620 usb_set_intfdata(interface, NULL); 1621 1622 nfc_digital_unregister_device(dev->nfc_digital_dev); 1623 nfc_digital_free_device(dev->nfc_digital_dev); 1624 1625 usb_kill_urb(dev->in_urb); 1626 usb_kill_urb(dev->out_urb); 1627 1628 usb_free_urb(dev->in_urb); 1629 usb_free_urb(dev->out_urb); 1630 1631 kfree(dev->cmd); 1632 1633 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected\n"); 1634 } 1635 1636 static struct usb_driver port100_driver = { 1637 .name = "port100", 1638 .probe = port100_probe, 1639 .disconnect = port100_disconnect, 1640 .id_table = port100_table, 1641 }; 1642 1643 module_usb_driver(port100_driver); 1644 1645 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION); 1646 MODULE_VERSION(VERSION); 1647 MODULE_LICENSE("GPL"); 1648