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 * 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 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 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(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(void *_frame) 572 { 573 u8 checksum; 574 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(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(void *frame) 599 { 600 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(struct port100 *dev, void *frame) 607 { 608 struct port100_frame *f = frame; 609 610 return (PORT100_FRAME_CMD(f) == PORT100_CMD_RESPONSE(dev->cmd->code)); 611 } 612 613 static void port100_recv_response(struct urb *urb) 614 { 615 struct port100 *dev = urb->context; 616 struct port100_cmd *cmd = dev->cmd; 617 u8 *in_frame; 618 619 cmd->status = urb->status; 620 621 switch (urb->status) { 622 case 0: 623 break; /* success */ 624 case -ECONNRESET: 625 case -ENOENT: 626 nfc_err(&dev->interface->dev, 627 "The urb has been canceled (status %d)\n", urb->status); 628 goto sched_wq; 629 case -ESHUTDOWN: 630 default: 631 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 632 urb->status); 633 goto sched_wq; 634 } 635 636 in_frame = dev->in_urb->transfer_buffer; 637 638 if (!port100_rx_frame_is_valid(in_frame)) { 639 nfc_err(&dev->interface->dev, "Received an invalid frame\n"); 640 cmd->status = -EIO; 641 goto sched_wq; 642 } 643 644 print_hex_dump_debug("PORT100 RX: ", DUMP_PREFIX_NONE, 16, 1, in_frame, 645 port100_rx_frame_size(in_frame), false); 646 647 if (!port100_rx_frame_is_cmd_response(dev, in_frame)) { 648 nfc_err(&dev->interface->dev, 649 "It's not the response to the last command\n"); 650 cmd->status = -EIO; 651 goto sched_wq; 652 } 653 654 sched_wq: 655 schedule_work(&dev->cmd_complete_work); 656 } 657 658 static int port100_submit_urb_for_response(struct port100 *dev, gfp_t flags) 659 { 660 dev->in_urb->complete = port100_recv_response; 661 662 return usb_submit_urb(dev->in_urb, flags); 663 } 664 665 static void port100_recv_ack(struct urb *urb) 666 { 667 struct port100 *dev = urb->context; 668 struct port100_cmd *cmd = dev->cmd; 669 struct port100_ack_frame *in_frame; 670 int rc; 671 672 cmd->status = urb->status; 673 674 switch (urb->status) { 675 case 0: 676 break; /* success */ 677 case -ECONNRESET: 678 case -ENOENT: 679 nfc_err(&dev->interface->dev, 680 "The urb has been stopped (status %d)\n", urb->status); 681 goto sched_wq; 682 case -ESHUTDOWN: 683 default: 684 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 685 urb->status); 686 goto sched_wq; 687 } 688 689 in_frame = dev->in_urb->transfer_buffer; 690 691 if (!port100_rx_frame_is_ack(in_frame)) { 692 nfc_err(&dev->interface->dev, "Received an invalid ack\n"); 693 cmd->status = -EIO; 694 goto sched_wq; 695 } 696 697 rc = port100_submit_urb_for_response(dev, GFP_ATOMIC); 698 if (rc) { 699 nfc_err(&dev->interface->dev, 700 "usb_submit_urb failed with result %d\n", rc); 701 cmd->status = rc; 702 goto sched_wq; 703 } 704 705 return; 706 707 sched_wq: 708 schedule_work(&dev->cmd_complete_work); 709 } 710 711 static int port100_submit_urb_for_ack(struct port100 *dev, gfp_t flags) 712 { 713 dev->in_urb->complete = port100_recv_ack; 714 715 return usb_submit_urb(dev->in_urb, flags); 716 } 717 718 static int port100_send_ack(struct port100 *dev) 719 { 720 int rc = 0; 721 722 mutex_lock(&dev->out_urb_lock); 723 724 /* 725 * If prior cancel is in-flight (dev->cmd_cancel == true), we 726 * can skip to send cancel. Then this will wait the prior 727 * cancel, or merged into the next cancel rarely if next 728 * cancel was started before waiting done. In any case, this 729 * will be waked up soon or later. 730 */ 731 if (!dev->cmd_cancel) { 732 reinit_completion(&dev->cmd_cancel_done); 733 734 usb_kill_urb(dev->out_urb); 735 736 dev->out_urb->transfer_buffer = ack_frame; 737 dev->out_urb->transfer_buffer_length = sizeof(ack_frame); 738 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL); 739 740 /* 741 * Set the cmd_cancel flag only if the URB has been 742 * successfully submitted. It will be reset by the out 743 * URB completion callback port100_send_complete(). 744 */ 745 dev->cmd_cancel = !rc; 746 } 747 748 mutex_unlock(&dev->out_urb_lock); 749 750 if (!rc) 751 wait_for_completion(&dev->cmd_cancel_done); 752 753 return rc; 754 } 755 756 static int port100_send_frame_async(struct port100 *dev, struct sk_buff *out, 757 struct sk_buff *in, int in_len) 758 { 759 int rc; 760 761 mutex_lock(&dev->out_urb_lock); 762 763 /* A command cancel frame as been sent through dev->out_urb. Don't try 764 * to submit a new one. 765 */ 766 if (dev->cmd_cancel) { 767 rc = -EAGAIN; 768 goto exit; 769 } 770 771 dev->out_urb->transfer_buffer = out->data; 772 dev->out_urb->transfer_buffer_length = out->len; 773 774 dev->in_urb->transfer_buffer = in->data; 775 dev->in_urb->transfer_buffer_length = in_len; 776 777 print_hex_dump_debug("PORT100 TX: ", DUMP_PREFIX_NONE, 16, 1, 778 out->data, out->len, false); 779 780 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL); 781 if (rc) 782 goto exit; 783 784 rc = port100_submit_urb_for_ack(dev, GFP_KERNEL); 785 if (rc) 786 usb_kill_urb(dev->out_urb); 787 788 exit: 789 mutex_unlock(&dev->out_urb_lock); 790 791 return rc; 792 } 793 794 static void port100_build_cmd_frame(struct port100 *dev, u8 cmd_code, 795 struct sk_buff *skb) 796 { 797 /* payload is already there, just update datalen */ 798 int payload_len = skb->len; 799 800 skb_push(skb, PORT100_FRAME_HEADER_LEN); 801 skb_put(skb, PORT100_FRAME_TAIL_LEN); 802 803 port100_tx_frame_init(skb->data, cmd_code); 804 port100_tx_update_payload_len(skb->data, payload_len); 805 port100_tx_frame_finish(skb->data); 806 } 807 808 static void port100_send_async_complete(struct port100 *dev) 809 { 810 struct port100_cmd *cmd = dev->cmd; 811 int status = cmd->status; 812 813 struct sk_buff *req = cmd->req; 814 struct sk_buff *resp = cmd->resp; 815 816 dev_kfree_skb(req); 817 818 dev->cmd = NULL; 819 820 if (status < 0) { 821 cmd->complete_cb(dev, cmd->complete_cb_context, 822 ERR_PTR(status)); 823 dev_kfree_skb(resp); 824 goto done; 825 } 826 827 skb_put(resp, port100_rx_frame_size(resp->data)); 828 skb_pull(resp, PORT100_FRAME_HEADER_LEN); 829 skb_trim(resp, resp->len - PORT100_FRAME_TAIL_LEN); 830 831 cmd->complete_cb(dev, cmd->complete_cb_context, resp); 832 833 done: 834 kfree(cmd); 835 } 836 837 static int port100_send_cmd_async(struct port100 *dev, u8 cmd_code, 838 struct sk_buff *req, 839 port100_send_async_complete_t complete_cb, 840 void *complete_cb_context) 841 { 842 struct port100_cmd *cmd; 843 struct sk_buff *resp; 844 int rc; 845 int resp_len = PORT100_FRAME_HEADER_LEN + 846 PORT100_FRAME_MAX_PAYLOAD_LEN + 847 PORT100_FRAME_TAIL_LEN; 848 849 if (dev->cmd) { 850 nfc_err(&dev->interface->dev, 851 "A command is still in process\n"); 852 return -EBUSY; 853 } 854 855 resp = alloc_skb(resp_len, GFP_KERNEL); 856 if (!resp) 857 return -ENOMEM; 858 859 cmd = kzalloc(sizeof(*cmd), GFP_KERNEL); 860 if (!cmd) { 861 dev_kfree_skb(resp); 862 return -ENOMEM; 863 } 864 865 cmd->code = cmd_code; 866 cmd->req = req; 867 cmd->resp = resp; 868 cmd->resp_len = resp_len; 869 cmd->complete_cb = complete_cb; 870 cmd->complete_cb_context = complete_cb_context; 871 872 port100_build_cmd_frame(dev, cmd_code, req); 873 874 dev->cmd = cmd; 875 876 rc = port100_send_frame_async(dev, req, resp, resp_len); 877 if (rc) { 878 kfree(cmd); 879 dev_kfree_skb(resp); 880 dev->cmd = NULL; 881 } 882 883 return rc; 884 } 885 886 struct port100_sync_cmd_response { 887 struct sk_buff *resp; 888 struct completion done; 889 }; 890 891 static void port100_wq_cmd_complete(struct work_struct *work) 892 { 893 struct port100 *dev = container_of(work, struct port100, 894 cmd_complete_work); 895 896 port100_send_async_complete(dev); 897 } 898 899 static void port100_send_sync_complete(struct port100 *dev, void *_arg, 900 struct sk_buff *resp) 901 { 902 struct port100_sync_cmd_response *arg = _arg; 903 904 arg->resp = resp; 905 complete(&arg->done); 906 } 907 908 static struct sk_buff *port100_send_cmd_sync(struct port100 *dev, u8 cmd_code, 909 struct sk_buff *req) 910 { 911 int rc; 912 struct port100_sync_cmd_response arg; 913 914 init_completion(&arg.done); 915 916 rc = port100_send_cmd_async(dev, cmd_code, req, 917 port100_send_sync_complete, &arg); 918 if (rc) { 919 dev_kfree_skb(req); 920 return ERR_PTR(rc); 921 } 922 923 wait_for_completion(&arg.done); 924 925 return arg.resp; 926 } 927 928 static void port100_send_complete(struct urb *urb) 929 { 930 struct port100 *dev = urb->context; 931 932 if (dev->cmd_cancel) { 933 complete_all(&dev->cmd_cancel_done); 934 dev->cmd_cancel = false; 935 } 936 937 switch (urb->status) { 938 case 0: 939 break; /* success */ 940 case -ECONNRESET: 941 case -ENOENT: 942 nfc_err(&dev->interface->dev, 943 "The urb has been stopped (status %d)\n", urb->status); 944 break; 945 case -ESHUTDOWN: 946 default: 947 nfc_err(&dev->interface->dev, "Urb failure (status %d)\n", 948 urb->status); 949 } 950 } 951 952 static void port100_abort_cmd(struct nfc_digital_dev *ddev) 953 { 954 struct port100 *dev = nfc_digital_get_drvdata(ddev); 955 956 /* An ack will cancel the last issued command */ 957 port100_send_ack(dev); 958 959 /* cancel the urb request */ 960 usb_kill_urb(dev->in_urb); 961 } 962 963 static struct sk_buff *port100_alloc_skb(struct port100 *dev, unsigned int size) 964 { 965 struct sk_buff *skb; 966 967 skb = alloc_skb(dev->skb_headroom + dev->skb_tailroom + size, 968 GFP_KERNEL); 969 if (skb) 970 skb_reserve(skb, dev->skb_headroom); 971 972 return skb; 973 } 974 975 static int port100_set_command_type(struct port100 *dev, u8 command_type) 976 { 977 struct sk_buff *skb; 978 struct sk_buff *resp; 979 int rc; 980 981 skb = port100_alloc_skb(dev, 1); 982 if (!skb) 983 return -ENOMEM; 984 985 skb_put_u8(skb, command_type); 986 987 resp = port100_send_cmd_sync(dev, PORT100_CMD_SET_COMMAND_TYPE, skb); 988 if (IS_ERR(resp)) 989 return PTR_ERR(resp); 990 991 rc = resp->data[0]; 992 993 dev_kfree_skb(resp); 994 995 return rc; 996 } 997 998 static u64 port100_get_command_type_mask(struct port100 *dev) 999 { 1000 struct sk_buff *skb; 1001 struct sk_buff *resp; 1002 u64 mask; 1003 1004 skb = port100_alloc_skb(dev, 0); 1005 if (!skb) 1006 return -ENOMEM; 1007 1008 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_COMMAND_TYPE, skb); 1009 if (IS_ERR(resp)) 1010 return PTR_ERR(resp); 1011 1012 if (resp->len < 8) 1013 mask = 0; 1014 else 1015 mask = be64_to_cpu(*(__be64 *)resp->data); 1016 1017 dev_kfree_skb(resp); 1018 1019 return mask; 1020 } 1021 1022 static u16 port100_get_firmware_version(struct port100 *dev) 1023 { 1024 struct sk_buff *skb; 1025 struct sk_buff *resp; 1026 u16 fw_ver; 1027 1028 skb = port100_alloc_skb(dev, 0); 1029 if (!skb) 1030 return 0; 1031 1032 resp = port100_send_cmd_sync(dev, PORT100_CMD_GET_FIRMWARE_VERSION, 1033 skb); 1034 if (IS_ERR(resp)) 1035 return 0; 1036 1037 fw_ver = le16_to_cpu(*(__le16 *)resp->data); 1038 1039 dev_kfree_skb(resp); 1040 1041 return fw_ver; 1042 } 1043 1044 static int port100_switch_rf(struct nfc_digital_dev *ddev, bool on) 1045 { 1046 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1047 struct sk_buff *skb, *resp; 1048 1049 skb = port100_alloc_skb(dev, 1); 1050 if (!skb) 1051 return -ENOMEM; 1052 1053 skb_put_u8(skb, on ? 1 : 0); 1054 1055 /* Cancel the last command if the device is being switched off */ 1056 if (!on) 1057 port100_abort_cmd(ddev); 1058 1059 resp = port100_send_cmd_sync(dev, PORT100_CMD_SWITCH_RF, skb); 1060 1061 if (IS_ERR(resp)) 1062 return PTR_ERR(resp); 1063 1064 dev_kfree_skb(resp); 1065 1066 return 0; 1067 } 1068 1069 static int port100_in_set_rf(struct nfc_digital_dev *ddev, u8 rf) 1070 { 1071 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1072 struct sk_buff *skb; 1073 struct sk_buff *resp; 1074 int rc; 1075 1076 if (rf >= NFC_DIGITAL_RF_TECH_LAST) 1077 return -EINVAL; 1078 1079 skb = port100_alloc_skb(dev, sizeof(struct port100_in_rf_setting)); 1080 if (!skb) 1081 return -ENOMEM; 1082 1083 skb_put_data(skb, &in_rf_settings[rf], 1084 sizeof(struct port100_in_rf_setting)); 1085 1086 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_RF, skb); 1087 1088 if (IS_ERR(resp)) 1089 return PTR_ERR(resp); 1090 1091 rc = resp->data[0]; 1092 1093 dev_kfree_skb(resp); 1094 1095 return rc; 1096 } 1097 1098 static int port100_in_set_framing(struct nfc_digital_dev *ddev, int param) 1099 { 1100 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1101 struct port100_protocol *protocols; 1102 struct sk_buff *skb; 1103 struct sk_buff *resp; 1104 int num_protocols; 1105 size_t size; 1106 int rc; 1107 1108 if (param >= NFC_DIGITAL_FRAMING_LAST) 1109 return -EINVAL; 1110 1111 protocols = in_protocols[param]; 1112 1113 num_protocols = 0; 1114 while (protocols[num_protocols].number != PORT100_IN_PROT_END) 1115 num_protocols++; 1116 1117 if (!num_protocols) 1118 return 0; 1119 1120 size = sizeof(struct port100_protocol) * num_protocols; 1121 1122 skb = port100_alloc_skb(dev, size); 1123 if (!skb) 1124 return -ENOMEM; 1125 1126 skb_put_data(skb, protocols, size); 1127 1128 resp = port100_send_cmd_sync(dev, PORT100_CMD_IN_SET_PROTOCOL, skb); 1129 1130 if (IS_ERR(resp)) 1131 return PTR_ERR(resp); 1132 1133 rc = resp->data[0]; 1134 1135 dev_kfree_skb(resp); 1136 1137 return rc; 1138 } 1139 1140 static int port100_in_configure_hw(struct nfc_digital_dev *ddev, int type, 1141 int param) 1142 { 1143 if (type == NFC_DIGITAL_CONFIG_RF_TECH) 1144 return port100_in_set_rf(ddev, param); 1145 1146 if (type == NFC_DIGITAL_CONFIG_FRAMING) 1147 return port100_in_set_framing(ddev, param); 1148 1149 return -EINVAL; 1150 } 1151 1152 static void port100_in_comm_rf_complete(struct port100 *dev, void *arg, 1153 struct sk_buff *resp) 1154 { 1155 struct port100_cb_arg *cb_arg = arg; 1156 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; 1157 u32 status; 1158 int rc; 1159 1160 if (IS_ERR(resp)) { 1161 rc = PTR_ERR(resp); 1162 goto exit; 1163 } 1164 1165 if (resp->len < 4) { 1166 nfc_err(&dev->interface->dev, 1167 "Invalid packet length received\n"); 1168 rc = -EIO; 1169 goto error; 1170 } 1171 1172 status = le32_to_cpu(*(__le32 *)resp->data); 1173 1174 skb_pull(resp, sizeof(u32)); 1175 1176 if (status == PORT100_CMD_STATUS_TIMEOUT) { 1177 rc = -ETIMEDOUT; 1178 goto error; 1179 } 1180 1181 if (status != PORT100_CMD_STATUS_OK) { 1182 nfc_err(&dev->interface->dev, 1183 "in_comm_rf failed with status 0x%08x\n", status); 1184 rc = -EIO; 1185 goto error; 1186 } 1187 1188 /* Remove collision bits byte */ 1189 skb_pull(resp, 1); 1190 1191 goto exit; 1192 1193 error: 1194 kfree_skb(resp); 1195 resp = ERR_PTR(rc); 1196 1197 exit: 1198 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); 1199 1200 kfree(cb_arg); 1201 } 1202 1203 static int port100_in_send_cmd(struct nfc_digital_dev *ddev, 1204 struct sk_buff *skb, u16 _timeout, 1205 nfc_digital_cmd_complete_t cb, void *arg) 1206 { 1207 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1208 struct port100_cb_arg *cb_arg; 1209 __le16 timeout; 1210 1211 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1212 if (!cb_arg) 1213 return -ENOMEM; 1214 1215 cb_arg->complete_cb = cb; 1216 cb_arg->complete_arg = arg; 1217 1218 timeout = cpu_to_le16(_timeout * 10); 1219 1220 memcpy(skb_push(skb, sizeof(__le16)), &timeout, sizeof(__le16)); 1221 1222 return port100_send_cmd_async(dev, PORT100_CMD_IN_COMM_RF, skb, 1223 port100_in_comm_rf_complete, cb_arg); 1224 } 1225 1226 static int port100_tg_set_rf(struct nfc_digital_dev *ddev, u8 rf) 1227 { 1228 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1229 struct sk_buff *skb; 1230 struct sk_buff *resp; 1231 int rc; 1232 1233 if (rf >= NFC_DIGITAL_RF_TECH_LAST) 1234 return -EINVAL; 1235 1236 skb = port100_alloc_skb(dev, sizeof(struct port100_tg_rf_setting)); 1237 if (!skb) 1238 return -ENOMEM; 1239 1240 skb_put_data(skb, &tg_rf_settings[rf], 1241 sizeof(struct port100_tg_rf_setting)); 1242 1243 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_RF, skb); 1244 1245 if (IS_ERR(resp)) 1246 return PTR_ERR(resp); 1247 1248 rc = resp->data[0]; 1249 1250 dev_kfree_skb(resp); 1251 1252 return rc; 1253 } 1254 1255 static int port100_tg_set_framing(struct nfc_digital_dev *ddev, int param) 1256 { 1257 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1258 struct port100_protocol *protocols; 1259 struct sk_buff *skb; 1260 struct sk_buff *resp; 1261 int rc; 1262 int num_protocols; 1263 size_t size; 1264 1265 if (param >= NFC_DIGITAL_FRAMING_LAST) 1266 return -EINVAL; 1267 1268 protocols = tg_protocols[param]; 1269 1270 num_protocols = 0; 1271 while (protocols[num_protocols].number != PORT100_TG_PROT_END) 1272 num_protocols++; 1273 1274 if (!num_protocols) 1275 return 0; 1276 1277 size = sizeof(struct port100_protocol) * num_protocols; 1278 1279 skb = port100_alloc_skb(dev, size); 1280 if (!skb) 1281 return -ENOMEM; 1282 1283 skb_put_data(skb, protocols, size); 1284 1285 resp = port100_send_cmd_sync(dev, PORT100_CMD_TG_SET_PROTOCOL, skb); 1286 1287 if (IS_ERR(resp)) 1288 return PTR_ERR(resp); 1289 1290 rc = resp->data[0]; 1291 1292 dev_kfree_skb(resp); 1293 1294 return rc; 1295 } 1296 1297 static int port100_tg_configure_hw(struct nfc_digital_dev *ddev, int type, 1298 int param) 1299 { 1300 if (type == NFC_DIGITAL_CONFIG_RF_TECH) 1301 return port100_tg_set_rf(ddev, param); 1302 1303 if (type == NFC_DIGITAL_CONFIG_FRAMING) 1304 return port100_tg_set_framing(ddev, param); 1305 1306 return -EINVAL; 1307 } 1308 1309 static bool port100_tg_target_activated(struct port100 *dev, u8 tgt_activated) 1310 { 1311 u8 mask; 1312 1313 switch (dev->cmd_type) { 1314 case PORT100_CMD_TYPE_0: 1315 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK; 1316 break; 1317 case PORT100_CMD_TYPE_1: 1318 mask = PORT100_MDAA_TGT_HAS_BEEN_ACTIVATED_MASK | 1319 PORT100_MDAA_TGT_WAS_ACTIVATED_MASK; 1320 break; 1321 default: 1322 nfc_err(&dev->interface->dev, "Unknown command type\n"); 1323 return false; 1324 } 1325 1326 return ((tgt_activated & mask) == mask); 1327 } 1328 1329 static void port100_tg_comm_rf_complete(struct port100 *dev, void *arg, 1330 struct sk_buff *resp) 1331 { 1332 u32 status; 1333 struct port100_cb_arg *cb_arg = arg; 1334 nfc_digital_cmd_complete_t cb = cb_arg->complete_cb; 1335 struct port100_tg_comm_rf_res *hdr; 1336 1337 if (IS_ERR(resp)) 1338 goto exit; 1339 1340 hdr = (struct port100_tg_comm_rf_res *)resp->data; 1341 1342 status = le32_to_cpu(hdr->status); 1343 1344 if (cb_arg->mdaa && 1345 !port100_tg_target_activated(dev, hdr->target_activated)) { 1346 kfree_skb(resp); 1347 resp = ERR_PTR(-ETIMEDOUT); 1348 1349 goto exit; 1350 } 1351 1352 skb_pull(resp, sizeof(struct port100_tg_comm_rf_res)); 1353 1354 if (status != PORT100_CMD_STATUS_OK) { 1355 kfree_skb(resp); 1356 1357 if (status == PORT100_CMD_STATUS_TIMEOUT) 1358 resp = ERR_PTR(-ETIMEDOUT); 1359 else 1360 resp = ERR_PTR(-EIO); 1361 } 1362 1363 exit: 1364 cb(dev->nfc_digital_dev, cb_arg->complete_arg, resp); 1365 1366 kfree(cb_arg); 1367 } 1368 1369 static int port100_tg_send_cmd(struct nfc_digital_dev *ddev, 1370 struct sk_buff *skb, u16 timeout, 1371 nfc_digital_cmd_complete_t cb, void *arg) 1372 { 1373 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1374 struct port100_tg_comm_rf_cmd *hdr; 1375 struct port100_cb_arg *cb_arg; 1376 1377 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1378 if (!cb_arg) 1379 return -ENOMEM; 1380 1381 cb_arg->complete_cb = cb; 1382 cb_arg->complete_arg = arg; 1383 1384 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd)); 1385 1386 hdr = (struct port100_tg_comm_rf_cmd *)skb->data; 1387 1388 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd)); 1389 hdr->guard_time = cpu_to_le16(500); 1390 hdr->send_timeout = cpu_to_le16(0xFFFF); 1391 hdr->recv_timeout = cpu_to_le16(timeout); 1392 1393 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb, 1394 port100_tg_comm_rf_complete, cb_arg); 1395 } 1396 1397 static int port100_listen_mdaa(struct nfc_digital_dev *ddev, 1398 struct digital_tg_mdaa_params *params, 1399 u16 timeout, 1400 nfc_digital_cmd_complete_t cb, void *arg) 1401 { 1402 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1403 struct port100_tg_comm_rf_cmd *hdr; 1404 struct port100_cb_arg *cb_arg; 1405 struct sk_buff *skb; 1406 int rc; 1407 1408 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, 1409 NFC_DIGITAL_RF_TECH_106A); 1410 if (rc) 1411 return rc; 1412 1413 rc = port100_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, 1414 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP); 1415 if (rc) 1416 return rc; 1417 1418 cb_arg = kzalloc(sizeof(struct port100_cb_arg), GFP_KERNEL); 1419 if (!cb_arg) 1420 return -ENOMEM; 1421 1422 cb_arg->complete_cb = cb; 1423 cb_arg->complete_arg = arg; 1424 cb_arg->mdaa = 1; 1425 1426 skb = port100_alloc_skb(dev, 0); 1427 if (!skb) { 1428 kfree(cb_arg); 1429 return -ENOMEM; 1430 } 1431 1432 skb_push(skb, sizeof(struct port100_tg_comm_rf_cmd)); 1433 hdr = (struct port100_tg_comm_rf_cmd *)skb->data; 1434 1435 memset(hdr, 0, sizeof(struct port100_tg_comm_rf_cmd)); 1436 1437 hdr->guard_time = 0; 1438 hdr->send_timeout = cpu_to_le16(0xFFFF); 1439 hdr->mdaa = 1; 1440 hdr->nfca_param[0] = (params->sens_res >> 8) & 0xFF; 1441 hdr->nfca_param[1] = params->sens_res & 0xFF; 1442 memcpy(hdr->nfca_param + 2, params->nfcid1, 3); 1443 hdr->nfca_param[5] = params->sel_res; 1444 memcpy(hdr->nfcf_param, params->nfcid2, 8); 1445 hdr->nfcf_param[16] = (params->sc >> 8) & 0xFF; 1446 hdr->nfcf_param[17] = params->sc & 0xFF; 1447 hdr->recv_timeout = cpu_to_le16(timeout); 1448 1449 return port100_send_cmd_async(dev, PORT100_CMD_TG_COMM_RF, skb, 1450 port100_tg_comm_rf_complete, cb_arg); 1451 } 1452 1453 static int port100_listen(struct nfc_digital_dev *ddev, u16 timeout, 1454 nfc_digital_cmd_complete_t cb, void *arg) 1455 { 1456 struct port100 *dev = nfc_digital_get_drvdata(ddev); 1457 struct sk_buff *skb; 1458 1459 skb = port100_alloc_skb(dev, 0); 1460 if (!skb) 1461 return -ENOMEM; 1462 1463 return port100_tg_send_cmd(ddev, skb, timeout, cb, arg); 1464 } 1465 1466 static struct nfc_digital_ops port100_digital_ops = { 1467 .in_configure_hw = port100_in_configure_hw, 1468 .in_send_cmd = port100_in_send_cmd, 1469 1470 .tg_listen_mdaa = port100_listen_mdaa, 1471 .tg_listen = port100_listen, 1472 .tg_configure_hw = port100_tg_configure_hw, 1473 .tg_send_cmd = port100_tg_send_cmd, 1474 1475 .switch_rf = port100_switch_rf, 1476 .abort_cmd = port100_abort_cmd, 1477 }; 1478 1479 static const struct usb_device_id port100_table[] = { 1480 { USB_DEVICE(SONY_VENDOR_ID, RCS380S_PRODUCT_ID), }, 1481 { USB_DEVICE(SONY_VENDOR_ID, RCS380P_PRODUCT_ID), }, 1482 { } 1483 }; 1484 MODULE_DEVICE_TABLE(usb, port100_table); 1485 1486 static int port100_probe(struct usb_interface *interface, 1487 const struct usb_device_id *id) 1488 { 1489 struct port100 *dev; 1490 int rc; 1491 struct usb_host_interface *iface_desc; 1492 struct usb_endpoint_descriptor *endpoint; 1493 int in_endpoint; 1494 int out_endpoint; 1495 u16 fw_version; 1496 u64 cmd_type_mask; 1497 int i; 1498 1499 dev = devm_kzalloc(&interface->dev, sizeof(struct port100), GFP_KERNEL); 1500 if (!dev) 1501 return -ENOMEM; 1502 1503 mutex_init(&dev->out_urb_lock); 1504 dev->udev = usb_get_dev(interface_to_usbdev(interface)); 1505 dev->interface = interface; 1506 usb_set_intfdata(interface, dev); 1507 1508 in_endpoint = out_endpoint = 0; 1509 iface_desc = interface->cur_altsetting; 1510 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 1511 endpoint = &iface_desc->endpoint[i].desc; 1512 1513 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) 1514 in_endpoint = endpoint->bEndpointAddress; 1515 1516 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) 1517 out_endpoint = endpoint->bEndpointAddress; 1518 } 1519 1520 if (!in_endpoint || !out_endpoint) { 1521 nfc_err(&interface->dev, 1522 "Could not find bulk-in or bulk-out endpoint\n"); 1523 rc = -ENODEV; 1524 goto error; 1525 } 1526 1527 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL); 1528 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL); 1529 1530 if (!dev->in_urb || !dev->out_urb) { 1531 nfc_err(&interface->dev, "Could not allocate USB URBs\n"); 1532 rc = -ENOMEM; 1533 goto error; 1534 } 1535 1536 usb_fill_bulk_urb(dev->in_urb, dev->udev, 1537 usb_rcvbulkpipe(dev->udev, in_endpoint), 1538 NULL, 0, NULL, dev); 1539 usb_fill_bulk_urb(dev->out_urb, dev->udev, 1540 usb_sndbulkpipe(dev->udev, out_endpoint), 1541 NULL, 0, port100_send_complete, dev); 1542 dev->out_urb->transfer_flags = URB_ZERO_PACKET; 1543 1544 dev->skb_headroom = PORT100_FRAME_HEADER_LEN + 1545 PORT100_COMM_RF_HEAD_MAX_LEN; 1546 dev->skb_tailroom = PORT100_FRAME_TAIL_LEN; 1547 1548 init_completion(&dev->cmd_cancel_done); 1549 INIT_WORK(&dev->cmd_complete_work, port100_wq_cmd_complete); 1550 1551 /* The first thing to do with the Port-100 is to set the command type 1552 * to be used. If supported we use command type 1. 0 otherwise. 1553 */ 1554 cmd_type_mask = port100_get_command_type_mask(dev); 1555 if (!cmd_type_mask) { 1556 nfc_err(&interface->dev, 1557 "Could not get supported command types\n"); 1558 rc = -ENODEV; 1559 goto error; 1560 } 1561 1562 if (PORT100_CMD_TYPE_IS_SUPPORTED(cmd_type_mask, PORT100_CMD_TYPE_1)) 1563 dev->cmd_type = PORT100_CMD_TYPE_1; 1564 else 1565 dev->cmd_type = PORT100_CMD_TYPE_0; 1566 1567 rc = port100_set_command_type(dev, dev->cmd_type); 1568 if (rc) { 1569 nfc_err(&interface->dev, 1570 "The device does not support command type %u\n", 1571 dev->cmd_type); 1572 goto error; 1573 } 1574 1575 fw_version = port100_get_firmware_version(dev); 1576 if (!fw_version) 1577 nfc_err(&interface->dev, 1578 "Could not get device firmware version\n"); 1579 1580 nfc_info(&interface->dev, 1581 "Sony NFC Port-100 Series attached (firmware v%x.%02x)\n", 1582 (fw_version & 0xFF00) >> 8, fw_version & 0xFF); 1583 1584 dev->nfc_digital_dev = nfc_digital_allocate_device(&port100_digital_ops, 1585 PORT100_PROTOCOLS, 1586 PORT100_CAPABILITIES, 1587 dev->skb_headroom, 1588 dev->skb_tailroom); 1589 if (!dev->nfc_digital_dev) { 1590 nfc_err(&interface->dev, 1591 "Could not allocate nfc_digital_dev\n"); 1592 rc = -ENOMEM; 1593 goto error; 1594 } 1595 1596 nfc_digital_set_parent_dev(dev->nfc_digital_dev, &interface->dev); 1597 nfc_digital_set_drvdata(dev->nfc_digital_dev, dev); 1598 1599 rc = nfc_digital_register_device(dev->nfc_digital_dev); 1600 if (rc) { 1601 nfc_err(&interface->dev, 1602 "Could not register digital device\n"); 1603 goto free_nfc_dev; 1604 } 1605 1606 return 0; 1607 1608 free_nfc_dev: 1609 nfc_digital_free_device(dev->nfc_digital_dev); 1610 1611 error: 1612 usb_free_urb(dev->in_urb); 1613 usb_free_urb(dev->out_urb); 1614 usb_put_dev(dev->udev); 1615 1616 return rc; 1617 } 1618 1619 static void port100_disconnect(struct usb_interface *interface) 1620 { 1621 struct port100 *dev; 1622 1623 dev = usb_get_intfdata(interface); 1624 usb_set_intfdata(interface, NULL); 1625 1626 nfc_digital_unregister_device(dev->nfc_digital_dev); 1627 nfc_digital_free_device(dev->nfc_digital_dev); 1628 1629 usb_kill_urb(dev->in_urb); 1630 usb_kill_urb(dev->out_urb); 1631 1632 usb_free_urb(dev->in_urb); 1633 usb_free_urb(dev->out_urb); 1634 usb_put_dev(dev->udev); 1635 1636 kfree(dev->cmd); 1637 1638 nfc_info(&interface->dev, "Sony Port-100 NFC device disconnected\n"); 1639 } 1640 1641 static struct usb_driver port100_driver = { 1642 .name = "port100", 1643 .probe = port100_probe, 1644 .disconnect = port100_disconnect, 1645 .id_table = port100_table, 1646 }; 1647 1648 module_usb_driver(port100_driver); 1649 1650 MODULE_DESCRIPTION("NFC Port-100 series usb driver ver " VERSION); 1651 MODULE_VERSION(VERSION); 1652 MODULE_LICENSE("GPL"); 1653