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 (!port100_rx_frame_is_valid(in_frame)) { 640 nfc_err(&dev->interface->dev, "Received an invalid frame\n"); 641 cmd->status = -EIO; 642 goto sched_wq; 643 } 644 645 print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame, 646 port100_rx_frame_size(in_frame), false); 647 648 if (!port100_rx_frame_is_cmd_response(dev, in_frame)) { 649 nfc_err(&dev->interface->dev, 650 "It's not the response to the last command\n"); 651 cmd->status = -EIO; 652 goto sched_wq; 653 } 654 655 sched_wq: 656 schedule_work(&dev->cmd_complete_work); 657 } 658 659 static int port100_submit_urb_for_response(const struct port100 *dev, 660 gfp_t flags) 661 { 662 dev->in_urb->complete = port100_recv_response; 663 664 return usb_submit_urb(dev->in_urb, flags); 665 } 666 667 static void port100_recv_ack(struct urb *urb) 668 { 669 struct port100 *dev = urb->context; 670 struct port100_cmd *cmd = dev->cmd; 671 const struct port100_ack_frame *in_frame; 672 int rc; 673 674 cmd->status = urb->status; 675 676 switch (urb->status) { 677 case 0: 678 break; /* success */ 679 case -ECONNRESET: 680 case -ENOENT: 681 nfc_dbg(&dev->interface->dev, 682 "The urb has been stopped (status %d)\n", urb->status); 683 goto sched_wq; 684 case -ESHUTDOWN: 685 default: 686 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 687 urb->status); 688 goto sched_wq; 689 } 690 691 in_frame = dev->in_urb->transfer_buffer; 692 693 if (!port100_rx_frame_is_ack(in_frame)) { 694 nfc_err(&dev->interface->dev, "Received an invalid ack\n"); 695 cmd->status = -EIO; 696 goto sched_wq; 697 } 698 699 rc = port100_submit_urb_for_response(dev, GFP_ATOMIC); 700 if (rc) { 701 nfc_err(&dev->interface->dev, 702 "usb_submit_urb failed with result %d\n", rc); 703 cmd->status = rc; 704 goto sched_wq; 705 } 706 707 return; 708 709 sched_wq: 710 schedule_work(&dev->cmd_complete_work); 711 } 712 713 static int port100_submit_urb_for_ack(const struct port100 *dev, gfp_t flags) 714 { 715 dev->in_urb->complete = port100_recv_ack; 716 717 return usb_submit_urb(dev->in_urb, flags); 718 } 719 720 static int port100_send_ack(struct port100 *dev) 721 { 722 int rc = 0; 723 724 mutex_lock(&dev->out_urb_lock); 725 726 /* 727 * If prior cancel is in-flight (dev->cmd_cancel == true), we 728 * can skip to send cancel. Then this will wait the prior 729 * cancel, or merged into the next cancel rarely if next 730 * cancel was started before waiting done. In any case, this 731 * will be waked up soon or later. 732 */ 733 if (!dev->cmd_cancel) { 734 reinit_completion(&dev->cmd_cancel_done); 735 736 usb_kill_urb(dev->out_urb); 737 738 dev->out_urb->transfer_buffer = ack_frame; 739 dev->out_urb->transfer_buffer_length = sizeof(ack_frame); 740 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL); 741 742 /* 743 * Set the cmd_cancel flag only if the URB has been 744 * successfully submitted. It will be reset by the out 745 * URB completion callback port100_send_complete(). 746 */ 747 dev->cmd_cancel = !rc; 748 } 749 750 mutex_unlock(&dev->out_urb_lock); 751 752 if (!rc) 753 wait_for_completion(&dev->cmd_cancel_done); 754 755 return rc; 756 } 757 758 static int port100_send_frame_async(struct port100 *dev, 759 const struct sk_buff *out, 760 const struct sk_buff *in, int in_len) 761 { 762 int rc; 763 764 mutex_lock(&dev->out_urb_lock); 765 766 /* A command cancel frame as been sent through dev->out_urb. Don't try 767 * to submit a new one. 768 */ 769 if (dev->cmd_cancel) { 770 rc = -EAGAIN; 771 goto exit; 772 } 773 774 dev->out_urb->transfer_buffer = out->data; 775 dev->out_urb->transfer_buffer_length = out->len; 776 777 dev->in_urb->transfer_buffer = in->data; 778 dev->in_urb->transfer_buffer_length = in_len; 779 780 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1, 781 out->data, out->len, false); 782 783 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL); 784 if (rc) 785 goto exit; 786 787 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL); 788 if (rc) 789 usb_kill_urb(dev->out_urb); 790 791 exit: 792 mutex_unlock(&dev->out_urb_lock); 793 794 return rc; 795 } 796 797 static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code, 798 struct sk_buff *skb) 799 { 800 /* payload is already there, just update datalen */ 801 int payload_len = skb->len; 802 803 skb_push(skb, PORT100_FRAME_HEADER_LEN); 804 skb_put(skb, PORT100_FRAME_TAIL_LEN); 805 806 port100_tx_frame_init(skb->data, cmd_code); 807 port100_tx_update_payload_len(skb->data, payload_len); 808 port100_tx_frame_finish(skb->data); 809 } 810 811 static void port100_send_async_complete(struct port100 *dev) 812 { 813 struct port100_cmd *cmd = dev->cmd; 814 int status = cmd->status; 815 816 struct sk_buff *req = cmd->req; 817 struct sk_buff *resp = cmd->resp; 818 819 dev_kfree_skb(req); 820 821 dev->cmd = NULL; 822 823 if (status < 0) { 824 cmd->complete_cb(dev, cmd->complete_cb_context, 825 ERR_PTR(status)); 826 dev_kfree_skb(resp); 827 goto done; 828 } 829 830 skb_put(resp, port100_rx_frame_size(resp->data)); 831 skb_pull(resp, PORT100_FRAME_HEADER_LEN); 832 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN); 833 834 cmd->complete_cb(dev, cmd->complete_cb_context, resp); 835 836 done: 837 kfree(cmd); 838 } 839 840 static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code, 841 struct sk_buff *req, 842 port100_send_async_complete_t complete_cb, 843 void *complete_cb_context) 844 { 845 struct port100_cmd *cmd; 846 struct sk_buff *resp; 847 int rc; 848 int resp_len = PORT100_FRAME_HEADER_LEN + 849 PORT100_FRAME_MAX_PAYLOAD_LEN + 850 PORT100_FRAME_TAIL_LEN; 851 852 if (dev->cmd) { 853 nfc_err(&dev->interface->dev, 854 "A command is still in process\n"); 855 return -EBUSY; 856 } 857 858 resp = alloc_skb(resp_len, GFP_KERNEL); 859 if (!resp) 860 return -ENOMEM; 861 862 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 863 if (!cmd) { 864 dev_kfree_skb(resp); 865 return -ENOMEM; 866 } 867 868 cmd->code = cmd_code; 869 cmd->req = req; 870 cmd->resp = resp; 871 cmd->resp_len = resp_len; 872 cmd->complete_cb = complete_cb; 873 cmd->complete_cb_context = complete_cb_context; 874 875 port100_build_cmd_frame(dev, cmd_code, req); 876 877 dev->cmd = cmd; 878 879 rc = port100_send_frame_async(dev, req, resp, resp_len); 880 if (rc) { 881 kfree(cmd); 882 dev_kfree_skb(resp); 883 dev->cmd = NULL; 884 } 885 886 return rc; 887 } 888 889 struct port100_sync_cmd_response { 890 struct sk_buff *resp; 891 struct completion done; 892 }; 893 894 static void port100_wq_cmd_complete(struct work_struct *work) 895 { 896 struct port100 *dev = container_of(work, struct port100, 897 cmd_complete_work); 898 899 port100_send_async_complete(dev); 900 } 901 902 static void port100_send_sync_complete(struct port100 *dev, void *_arg, 903 struct sk_buff *resp) 904 { 905 struct port100_sync_cmd_response *arg = _arg; 906 907 arg->resp = resp; 908 complete(&arg->done); 909 } 910 911 static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code, 912 struct sk_buff *req) 913 { 914 int rc; 915 struct port100_sync_cmd_response arg; 916 917 init_completion(&arg.done); 918 919 rc = port100_send_cmd_async(dev, cmd_code, req, 920 port100_send_sync_complete, &arg); 921 if (rc) { 922 dev_kfree_skb(req); 923 return ERR_PTR(rc); 924 } 925 926 wait_for_completion(&arg.done); 927 928 return arg.resp; 929 } 930 931 static void port100_send_complete(struct urb *urb) 932 { 933 struct port100 *dev = urb->context; 934 935 if (dev->cmd_cancel) { 936 complete_all(&dev->cmd_cancel_done); 937 dev->cmd_cancel = false; 938 } 939 940 switch (urb->status) { 941 case 0: 942 break; /* success */ 943 case -ECONNRESET: 944 case -ENOENT: 945 nfc_dbg(&dev->interface->dev, 946 "The urb has been stopped (status %d)\n", urb->status); 947 break; 948 case -ESHUTDOWN: 949 default: 950 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 951 urb->status); 952 } 953 } 954 955 static void port100_abort_cmd(struct nfc_digital_dev *ddev) 956 { 957 struct port100 *dev = nfc_digital_get_drvdata(ddev); 958 959 /* An ack will cancel the last issued command */ 960 port100_send_ack(dev); 961 962 /* cancel the urb request */ 963 usb_kill_urb(dev->in_urb); 964 } 965 966 static struct sk_buff *port100_alloc_skb(const struct port100 *dev, unsigned int size) 967 { 968 struct sk_buff *skb; 969 970 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size, 971 GFP_KERNEL); 972 if (skb) 973 skb_reserve(skb, dev->skb_headroom); 974 975 return skb; 976 } 977 978 static int port100_set_command_type(struct port100 *dev, u8 command_type) 979 { 980 struct sk_buff *skb; 981 struct sk_buff *resp; 982 int rc; 983 984 skb = port100_alloc_skb(dev, 1); 985 if (!skb) 986 return -ENOMEM; 987 988 skb_put_u8(skb, command_type); 989 990 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb); 991 if (IS_ERR(resp)) 992 return PTR_ERR(resp); 993 994 rc = resp->data[0]; 995 996 dev_kfree_skb(resp); 997 998 return rc; 999 } 1000 1001 static u64 port100_get_command_type_mask(struct port100 *dev) 1002 { 1003 struct sk_buff *skb; 1004 struct sk_buff *resp; 1005 u64 mask; 1006 1007 skb = port100_alloc_skb(dev, 0); 1008 if (!skb) 1009 return 0; 1010 1011 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb); 1012 if (IS_ERR(resp)) 1013 return 0; 1014 1015 if (resp->len < 8) 1016 mask = 0; 1017 else 1018 mask = be64_to_cpu(*(__be64 *)resp->data); 1019 1020 dev_kfree_skb(resp); 1021 1022 return mask; 1023 } 1024 1025 static u16 port100_get_firmware_version(struct port100 *dev) 1026 { 1027 struct sk_buff *skb; 1028 struct sk_buff *resp; 1029 u16 fw_ver; 1030 1031 skb = port100_alloc_skb(dev, 0); 1032 if (!skb) 1033 return 0; 1034 1035 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION, 1036 skb); 1037 if (IS_ERR(resp)) 1038 return 0; 1039 1040 fw_ver = le16_to_cpu(*(__le16 *)resp->data); 1041 1042 dev_kfree_skb(resp); 1043 1044 return fw_ver; 1045 } 1046 1047 static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on) 1048 { 1049 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1050 struct sk_buff *skb, *resp; 1051 1052 skb = port100_alloc_skb(dev, 1); 1053 if (!skb) 1054 return -ENOMEM; 1055 1056 skb_put_u8(skb, on ? 1 : 0); 1057 1058 /* Cancel the last command if the device is being switched off */ 1059 if (!on) 1060 port100_abort_cmd(ddev); 1061 1062 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb); 1063 1064 if (IS_ERR(resp)) 1065 return PTR_ERR(resp); 1066 1067 dev_kfree_skb(resp); 1068 1069 return 0; 1070 } 1071 1072 static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf) 1073 { 1074 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1075 struct sk_buff *skb; 1076 struct sk_buff *resp; 1077 int rc; 1078 1079 if (rf >= NFC_DIGITAL_RF_TECH_LAST) 1080 return -EINVAL; 1081 1082 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting)); 1083 if (!skb) 1084 return -ENOMEM; 1085 1086 skb_put_data(skb, &in_rf_settings[rf], 1087 sizeof(struct port100_in_rf_setting)); 1088 1089 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb); 1090 1091 if (IS_ERR(resp)) 1092 return PTR_ERR(resp); 1093 1094 rc = resp->data[0]; 1095 1096 dev_kfree_skb(resp); 1097 1098 return rc; 1099 } 1100 1101 static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param) 1102 { 1103 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1104 const struct port100_protocol *protocols; 1105 struct sk_buff *skb; 1106 struct sk_buff *resp; 1107 int num_protocols; 1108 size_t size; 1109 int rc; 1110 1111 if (param >= NFC_DIGITAL_FRAMING_LAST) 1112 return -EINVAL; 1113 1114 protocols = in_protocols[param]; 1115 1116 num_protocols = 0; 1117 while (protocols[num_protocols].number != PORT100_IN_PROT_END) 1118 num_protocols++; 1119 1120 if (!num_protocols) 1121 return 0; 1122 1123 size = sizeof(struct port100_protocol) * num_protocols; 1124 1125 skb = port100_alloc_skb(dev, size); 1126 if (!skb) 1127 return -ENOMEM; 1128 1129 skb_put_data(skb, protocols, size); 1130 1131 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb); 1132 1133 if (IS_ERR(resp)) 1134 return PTR_ERR(resp); 1135 1136 rc = resp->data[0]; 1137 1138 dev_kfree_skb(resp); 1139 1140 return rc; 1141 } 1142 1143 static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type, 1144 int param) 1145 { 1146 if (type == NFC_DIGITAL_CONFIG_RF_TECH) 1147 return port100_in_set_rf(ddev, param); 1148 1149 if (type == NFC_DIGITAL_CONFIG_FRAMING) 1150 return port100_in_set_framing(ddev, param); 1151 1152 return -EINVAL; 1153 } 1154 1155 static void port100_in_comm_rf_complete(struct port100 *dev, void *arg, 1156 struct sk_buff *resp) 1157 { 1158 const struct port100_cb_arg *cb_arg = arg; 1159 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; 1160 u32 status; 1161 int rc; 1162 1163 if (IS_ERR(resp)) { 1164 rc = PTR_ERR(resp); 1165 goto exit; 1166 } 1167 1168 if (resp->len < 4) { 1169 nfc_err(&dev->interface->dev, 1170 "Invalid packet length received\n"); 1171 rc = -EIO; 1172 goto error; 1173 } 1174 1175 status = le32_to_cpu(*(__le32 *)resp->data); 1176 1177 skb_pull(resp, sizeof(u32)); 1178 1179 if (status == PORT100_CMD_STATUS_TIMEOUT) { 1180 rc = -ETIMEDOUT; 1181 goto error; 1182 } 1183 1184 if (status != PORT100_CMD_STATUS_OK) { 1185 nfc_err(&dev->interface->dev, 1186 "in_comm_rf failed with status 0x%08x\n", status); 1187 rc = -EIO; 1188 goto error; 1189 } 1190 1191 /* Remove collision bits byte */ 1192 skb_pull(resp, 1); 1193 1194 goto exit; 1195 1196 error: 1197 kfree_skb(resp); 1198 resp = ERR_PTR(rc); 1199 1200 exit: 1201 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); 1202 1203 kfree(cb_arg); 1204 } 1205 1206 static int port100_in_send_cmd(struct nfc_digital_dev *ddev, 1207 struct sk_buff *skb, u16 _timeout, 1208 nfc_digital_cmd_complete_t cb, void *arg) 1209 { 1210 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1211 struct port100_cb_arg *cb_arg; 1212 __le16 timeout; 1213 1214 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1215 if (!cb_arg) 1216 return -ENOMEM; 1217 1218 cb_arg->complete_cb = cb; 1219 cb_arg->complete_arg = arg; 1220 1221 timeout = cpu_to_le16(_timeout * 10); 1222 1223 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16)); 1224 1225 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb, 1226 port100_in_comm_rf_complete, cb_arg); 1227 } 1228 1229 static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf) 1230 { 1231 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1232 struct sk_buff *skb; 1233 struct sk_buff *resp; 1234 int rc; 1235 1236 if (rf >= NFC_DIGITAL_RF_TECH_LAST) 1237 return -EINVAL; 1238 1239 skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting)); 1240 if (!skb) 1241 return -ENOMEM; 1242 1243 skb_put_data(skb, &tg_rf_settings[rf], 1244 sizeof(struct port100_tg_rf_setting)); 1245 1246 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb); 1247 1248 if (IS_ERR(resp)) 1249 return PTR_ERR(resp); 1250 1251 rc = resp->data[0]; 1252 1253 dev_kfree_skb(resp); 1254 1255 return rc; 1256 } 1257 1258 static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param) 1259 { 1260 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1261 const struct port100_protocol *protocols; 1262 struct sk_buff *skb; 1263 struct sk_buff *resp; 1264 int rc; 1265 int num_protocols; 1266 size_t size; 1267 1268 if (param >= NFC_DIGITAL_FRAMING_LAST) 1269 return -EINVAL; 1270 1271 protocols = tg_protocols[param]; 1272 1273 num_protocols = 0; 1274 while (protocols[num_protocols].number != PORT100_TG_PROT_END) 1275 num_protocols++; 1276 1277 if (!num_protocols) 1278 return 0; 1279 1280 size = sizeof(struct port100_protocol) * num_protocols; 1281 1282 skb = port100_alloc_skb(dev, size); 1283 if (!skb) 1284 return -ENOMEM; 1285 1286 skb_put_data(skb, protocols, size); 1287 1288 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb); 1289 1290 if (IS_ERR(resp)) 1291 return PTR_ERR(resp); 1292 1293 rc = resp->data[0]; 1294 1295 dev_kfree_skb(resp); 1296 1297 return rc; 1298 } 1299 1300 static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type, 1301 int param) 1302 { 1303 if (type == NFC_DIGITAL_CONFIG_RF_TECH) 1304 return port100_tg_set_rf(ddev, param); 1305 1306 if (type == NFC_DIGITAL_CONFIG_FRAMING) 1307 return port100_tg_set_framing(ddev, param); 1308 1309 return -EINVAL; 1310 } 1311 1312 static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated) 1313 { 1314 u8 mask; 1315 1316 switch (dev->cmd_type) { 1317 case PORT100_CMD_TYPE_0: 1318 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK; 1319 break; 1320 case PORT100_CMD_TYPE_1: 1321 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK | 1322 PORT100_MDAA_TGT_WAS_ACTIVATED_MASK; 1323 break; 1324 default: 1325 nfc_err(&dev->interface->dev, "Unknown command type\n"); 1326 return false; 1327 } 1328 1329 return ((tgt_activated & mask) == mask); 1330 } 1331 1332 static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg, 1333 struct sk_buff *resp) 1334 { 1335 u32 status; 1336 const struct port100_cb_arg *cb_arg = arg; 1337 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; 1338 struct port100_tg_comm_rf_res *hdr; 1339 1340 if (IS_ERR(resp)) 1341 goto exit; 1342 1343 hdr = (struct port100_tg_comm_rf_res *)resp->data; 1344 1345 status = le32_to_cpu(hdr->status); 1346 1347 if (cb_arg->mdaa && 1348 !port100_tg_target_activated(dev, hdr->target_activated)) { 1349 kfree_skb(resp); 1350 resp = ERR_PTR(-ETIMEDOUT); 1351 1352 goto exit; 1353 } 1354 1355 skb_pull(resp, sizeof(struct port100_tg_comm_rf_res)); 1356 1357 if (status != PORT100_CMD_STATUS_OK) { 1358 kfree_skb(resp); 1359 1360 if (status == PORT100_CMD_STATUS_TIMEOUT) 1361 resp = ERR_PTR(-ETIMEDOUT); 1362 else 1363 resp = ERR_PTR(-EIO); 1364 } 1365 1366 exit: 1367 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); 1368 1369 kfree(cb_arg); 1370 } 1371 1372 static int port100_tg_send_cmd(struct nfc_digital_dev *ddev, 1373 struct sk_buff *skb, u16 timeout, 1374 nfc_digital_cmd_complete_t cb, void *arg) 1375 { 1376 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1377 struct port100_tg_comm_rf_cmd *hdr; 1378 struct port100_cb_arg *cb_arg; 1379 1380 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1381 if (!cb_arg) 1382 return -ENOMEM; 1383 1384 cb_arg->complete_cb = cb; 1385 cb_arg->complete_arg = arg; 1386 1387 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd)); 1388 1389 hdr = (struct port100_tg_comm_rf_cmd *)skb->data; 1390 1391 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd)); 1392 hdr->guard_time = cpu_to_le16(500); 1393 hdr->send_timeout = cpu_to_le16(0xFFFF); 1394 hdr->recv_timeout = cpu_to_le16(timeout); 1395 1396 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb, 1397 port100_tg_comm_rf_complete, cb_arg); 1398 } 1399 1400 static int port100_listen_mdaa(struct nfc_digital_dev *ddev, 1401 struct digital_tg_mdaa_params *params, 1402 u16 timeout, 1403 nfc_digital_cmd_complete_t cb, void *arg) 1404 { 1405 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1406 struct port100_tg_comm_rf_cmd *hdr; 1407 struct port100_cb_arg *cb_arg; 1408 struct sk_buff *skb; 1409 int rc; 1410 1411 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, 1412 NFC_DIGITAL_RF_TECH_106A); 1413 if (rc) 1414 return rc; 1415 1416 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, 1417 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); 1418 if (rc) 1419 return rc; 1420 1421 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1422 if (!cb_arg) 1423 return -ENOMEM; 1424 1425 cb_arg->complete_cb = cb; 1426 cb_arg->complete_arg = arg; 1427 cb_arg->mdaa = 1; 1428 1429 skb = port100_alloc_skb(dev, 0); 1430 if (!skb) { 1431 kfree(cb_arg); 1432 return -ENOMEM; 1433 } 1434 1435 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd)); 1436 hdr = (struct port100_tg_comm_rf_cmd *)skb->data; 1437 1438 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd)); 1439 1440 hdr->guard_time = 0; 1441 hdr->send_timeout = cpu_to_le16(0xFFFF); 1442 hdr->mdaa = 1; 1443 hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF; 1444 hdr->nfca_param[1] = params->sens_res & 0xFF; 1445 memcpy(hdr->nfca_param + 2, params->nfcid1, 3); 1446 hdr->nfca_param[5] = params->sel_res; 1447 memcpy(hdr->nfcf_param, params->nfcid2, 8); 1448 hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF; 1449 hdr->nfcf_param[17] = params->sc & 0xFF; 1450 hdr->recv_timeout = cpu_to_le16(timeout); 1451 1452 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb, 1453 port100_tg_comm_rf_complete, cb_arg); 1454 } 1455 1456 static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout, 1457 nfc_digital_cmd_complete_t cb, void *arg) 1458 { 1459 const struct port100 *dev = nfc_digital_get_drvdata(ddev); 1460 struct sk_buff *skb; 1461 1462 skb = port100_alloc_skb(dev, 0); 1463 if (!skb) 1464 return -ENOMEM; 1465 1466 return port100_tg_send_cmd(ddev, skb, timeout, cb, arg); 1467 } 1468 1469 static const struct nfc_digital_ops port100_digital_ops = { 1470 .in_configure_hw = port100_in_configure_hw, 1471 .in_send_cmd = port100_in_send_cmd, 1472 1473 .tg_listen_mdaa = port100_listen_mdaa, 1474 .tg_listen = port100_listen, 1475 .tg_configure_hw = port100_tg_configure_hw, 1476 .tg_send_cmd = port100_tg_send_cmd, 1477 1478 .switch_rf = port100_switch_rf, 1479 .abort_cmd = port100_abort_cmd, 1480 }; 1481 1482 static const struct usb_device_id port100_table[] = { 1483 { USB_DEVICE(SONY_VENDOR_ID, RCS380S_PRODUCT_ID), }, 1484 { USB_DEVICE(SONY_VENDOR_ID, RCS380P_PRODUCT_ID), }, 1485 { } 1486 }; 1487 MODULE_DEVICE_TABLE(usb, port100_table); 1488 1489 static int port100_probe(struct usb_interface *interface, 1490 const struct usb_device_id *id) 1491 { 1492 struct port100 *dev; 1493 int rc; 1494 struct usb_host_interface *iface_desc; 1495 struct usb_endpoint_descriptor *endpoint; 1496 int in_endpoint; 1497 int out_endpoint; 1498 u16 fw_version; 1499 u64 cmd_type_mask; 1500 int i; 1501 1502 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL); 1503 if (!dev) 1504 return -ENOMEM; 1505 1506 mutex_init(&dev->out_urb_lock); 1507 dev->udev = usb_get_dev(interface_to_usbdev(interface)); 1508 dev->interface = interface; 1509 usb_set_intfdata(interface, dev); 1510 1511 in_endpoint = out_endpoint = 0; 1512 iface_desc = interface->cur_altsetting; 1513 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 1514 endpoint = &iface_desc->endpoint[i].desc; 1515 1516 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) 1517 in_endpoint = endpoint->bEndpointAddress; 1518 1519 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) 1520 out_endpoint = endpoint->bEndpointAddress; 1521 } 1522 1523 if (!in_endpoint || !out_endpoint) { 1524 nfc_err(&interface->dev, 1525 "Could not find bulk-in or bulk-out endpoint\n"); 1526 rc = -ENODEV; 1527 goto error; 1528 } 1529 1530 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL); 1531 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL); 1532 1533 if (!dev->in_urb || !dev->out_urb) { 1534 nfc_err(&interface->dev, "Could not allocate USB URBs\n"); 1535 rc = -ENOMEM; 1536 goto error; 1537 } 1538 1539 usb_fill_bulk_urb(dev->in_urb, dev->udev, 1540 usb_rcvbulkpipe(dev->udev, in_endpoint), 1541 NULL, 0, NULL, dev); 1542 usb_fill_bulk_urb(dev->out_urb, dev->udev, 1543 usb_sndbulkpipe(dev->udev, out_endpoint), 1544 NULL, 0, port100_send_complete, dev); 1545 dev->out_urb->transfer_flags = URB_ZERO_PACKET; 1546 1547 dev->skb_headroom = PORT100_FRAME_HEADER_LEN + 1548 PORT100_COMM_RF_HEAD_MAX_LEN; 1549 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN; 1550 1551 init_completion(&dev->cmd_cancel_done); 1552 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete); 1553 1554 /* The first thing to do with the Port-100 is to set the command type 1555 * to be used. If supported we use command type 1. 0 otherwise. 1556 */ 1557 cmd_type_mask = port100_get_command_type_mask(dev); 1558 if (!cmd_type_mask) { 1559 nfc_err(&interface->dev, 1560 "Could not get supported command types\n"); 1561 rc = -ENODEV; 1562 goto error; 1563 } 1564 1565 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1)) 1566 dev->cmd_type = PORT100_CMD_TYPE_1; 1567 else 1568 dev->cmd_type = PORT100_CMD_TYPE_0; 1569 1570 rc = port100_set_command_type(dev, dev->cmd_type); 1571 if (rc) { 1572 nfc_err(&interface->dev, 1573 "The device does not support command type %u\n", 1574 dev->cmd_type); 1575 goto error; 1576 } 1577 1578 fw_version = port100_get_firmware_version(dev); 1579 if (!fw_version) 1580 nfc_err(&interface->dev, 1581 "Could not get device firmware version\n"); 1582 1583 nfc_info(&interface->dev, 1584 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n", 1585 (fw_version & 0xFF00) >> 8, fw_version & 0xFF); 1586 1587 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops, 1588 PORT100_PROTOCOLS, 1589 PORT100_CAPABILITIES, 1590 dev->skb_headroom, 1591 dev->skb_tailroom); 1592 if (!dev->nfc_digital_dev) { 1593 nfc_err(&interface->dev, 1594 "Could not allocate nfc_digital_dev\n"); 1595 rc = -ENOMEM; 1596 goto error; 1597 } 1598 1599 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev); 1600 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev); 1601 1602 rc = nfc_digital_register_device(dev->nfc_digital_dev); 1603 if (rc) { 1604 nfc_err(&interface->dev, 1605 "Could not register digital device\n"); 1606 goto free_nfc_dev; 1607 } 1608 1609 return 0; 1610 1611 free_nfc_dev: 1612 nfc_digital_free_device(dev->nfc_digital_dev); 1613 1614 error: 1615 usb_kill_urb(dev->in_urb); 1616 usb_free_urb(dev->in_urb); 1617 usb_kill_urb(dev->out_urb); 1618 usb_free_urb(dev->out_urb); 1619 usb_put_dev(dev->udev); 1620 1621 return rc; 1622 } 1623 1624 static void port100_disconnect(struct usb_interface *interface) 1625 { 1626 struct port100 *dev; 1627 1628 dev = usb_get_intfdata(interface); 1629 usb_set_intfdata(interface, NULL); 1630 1631 nfc_digital_unregister_device(dev->nfc_digital_dev); 1632 nfc_digital_free_device(dev->nfc_digital_dev); 1633 1634 usb_kill_urb(dev->in_urb); 1635 usb_kill_urb(dev->out_urb); 1636 1637 usb_free_urb(dev->in_urb); 1638 usb_free_urb(dev->out_urb); 1639 usb_put_dev(dev->udev); 1640 1641 kfree(dev->cmd); 1642 1643 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected\n"); 1644 } 1645 1646 static struct usb_driver port100_driver = { 1647 .name = "port100", 1648 .probe = port100_probe, 1649 .disconnect = port100_disconnect, 1650 .id_table = port100_table, 1651 }; 1652 1653 module_usb_driver(port100_driver); 1654 1655 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION); 1656 MODULE_VERSION(VERSION); 1657 MODULE_LICENSE("GPL"); 1658