1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2014 STMicroelectronics SAS. All rights reserved. 4 */ 5 6 #include <net/nfc/hci.h> 7 8 #include "st21nfca.h" 9 10 #define ST21NFCA_NFCIP1_INITIATOR 0x00 11 #define ST21NFCA_NFCIP1_REQ 0xd4 12 #define ST21NFCA_NFCIP1_RES 0xd5 13 #define ST21NFCA_NFCIP1_ATR_REQ 0x00 14 #define ST21NFCA_NFCIP1_ATR_RES 0x01 15 #define ST21NFCA_NFCIP1_PSL_REQ 0x04 16 #define ST21NFCA_NFCIP1_PSL_RES 0x05 17 #define ST21NFCA_NFCIP1_DEP_REQ 0x06 18 #define ST21NFCA_NFCIP1_DEP_RES 0x07 19 20 #define ST21NFCA_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03) 21 #define ST21NFCA_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0) 22 #define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ 23 ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT) 24 #define ST21NFCA_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & 0x04) 25 #define ST21NFCA_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08) 26 #define ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT 0x10 27 28 #define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ 29 ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT) 30 31 #define ST21NFCA_NFC_DEP_PFB_I_PDU 0x00 32 #define ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU 0x40 33 #define ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU 0x80 34 35 #define ST21NFCA_ATR_REQ_MIN_SIZE 17 36 #define ST21NFCA_ATR_REQ_MAX_SIZE 65 37 #define ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B 0x30 38 #define ST21NFCA_GB_BIT 0x02 39 40 #define ST21NFCA_EVT_SEND_DATA 0x10 41 #define ST21NFCA_EVT_FIELD_ON 0x11 42 #define ST21NFCA_EVT_CARD_DEACTIVATED 0x12 43 #define ST21NFCA_EVT_CARD_ACTIVATED 0x13 44 #define ST21NFCA_EVT_FIELD_OFF 0x14 45 46 #define ST21NFCA_EVT_CARD_F_BITRATE 0x16 47 #define ST21NFCA_EVT_READER_F_BITRATE 0x13 48 #define ST21NFCA_PSL_REQ_SEND_SPEED(brs) (brs & 0x38) 49 #define ST21NFCA_PSL_REQ_RECV_SPEED(brs) (brs & 0x07) 50 #define ST21NFCA_PP2LRI(pp) ((pp & 0x30) >> 4) 51 #define ST21NFCA_CARD_BITRATE_212 0x01 52 #define ST21NFCA_CARD_BITRATE_424 0x02 53 54 #define ST21NFCA_DEFAULT_TIMEOUT 0x0a 55 56 57 #define PROTOCOL_ERR(req) pr_err("%d: ST21NFCA Protocol error: %s\n", \ 58 __LINE__, req) 59 60 struct st21nfca_atr_req { 61 u8 length; 62 u8 cmd0; 63 u8 cmd1; 64 u8 nfcid3[NFC_NFCID3_MAXSIZE]; 65 u8 did; 66 u8 bsi; 67 u8 bri; 68 u8 ppi; 69 u8 gbi[]; 70 } __packed; 71 72 struct st21nfca_atr_res { 73 u8 length; 74 u8 cmd0; 75 u8 cmd1; 76 u8 nfcid3[NFC_NFCID3_MAXSIZE]; 77 u8 did; 78 u8 bsi; 79 u8 bri; 80 u8 to; 81 u8 ppi; 82 u8 gbi[]; 83 } __packed; 84 85 struct st21nfca_psl_req { 86 u8 length; 87 u8 cmd0; 88 u8 cmd1; 89 u8 did; 90 u8 brs; 91 u8 fsl; 92 } __packed; 93 94 struct st21nfca_psl_res { 95 u8 length; 96 u8 cmd0; 97 u8 cmd1; 98 u8 did; 99 } __packed; 100 101 struct st21nfca_dep_req_res { 102 u8 length; 103 u8 cmd0; 104 u8 cmd1; 105 u8 pfb; 106 u8 did; 107 u8 nad; 108 } __packed; 109 110 static void st21nfca_tx_work(struct work_struct *work) 111 { 112 struct st21nfca_hci_info *info = container_of(work, 113 struct st21nfca_hci_info, 114 dep_info.tx_work); 115 116 struct nfc_dev *dev; 117 struct sk_buff *skb; 118 119 dev = info->hdev->ndev; 120 skb = info->dep_info.tx_pending; 121 122 device_lock(&dev->dev); 123 124 nfc_hci_send_cmd_async(info->hdev, ST21NFCA_RF_READER_F_GATE, 125 ST21NFCA_WR_XCHG_DATA, skb->data, skb->len, 126 info->async_cb, info); 127 device_unlock(&dev->dev); 128 kfree_skb(skb); 129 } 130 131 static void st21nfca_im_send_pdu(struct st21nfca_hci_info *info, 132 struct sk_buff *skb) 133 { 134 info->dep_info.tx_pending = skb; 135 schedule_work(&info->dep_info.tx_work); 136 } 137 138 static int st21nfca_tm_send_atr_res(struct nfc_hci_dev *hdev, 139 struct st21nfca_atr_req *atr_req) 140 { 141 struct st21nfca_atr_res *atr_res; 142 struct sk_buff *skb; 143 size_t gb_len; 144 int r; 145 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 146 147 gb_len = atr_req->length - sizeof(struct st21nfca_atr_req); 148 skb = alloc_skb(atr_req->length + 1, GFP_KERNEL); 149 if (!skb) 150 return -ENOMEM; 151 152 skb_put(skb, sizeof(struct st21nfca_atr_res)); 153 154 atr_res = (struct st21nfca_atr_res *)skb->data; 155 memset(atr_res, 0, sizeof(struct st21nfca_atr_res)); 156 157 atr_res->length = atr_req->length + 1; 158 atr_res->cmd0 = ST21NFCA_NFCIP1_RES; 159 atr_res->cmd1 = ST21NFCA_NFCIP1_ATR_RES; 160 161 memcpy(atr_res->nfcid3, atr_req->nfcid3, 6); 162 atr_res->bsi = 0x00; 163 atr_res->bri = 0x00; 164 atr_res->to = ST21NFCA_DEFAULT_TIMEOUT; 165 atr_res->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; 166 167 if (gb_len) { 168 skb_put(skb, gb_len); 169 170 atr_res->ppi |= ST21NFCA_GB_BIT; 171 memcpy(atr_res->gbi, atr_req->gbi, gb_len); 172 r = nfc_set_remote_general_bytes(hdev->ndev, atr_res->gbi, 173 gb_len); 174 if (r < 0) { 175 kfree_skb(skb); 176 return r; 177 } 178 } 179 180 info->dep_info.curr_nfc_dep_pni = 0; 181 182 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 183 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); 184 kfree_skb(skb); 185 return r; 186 } 187 188 static int st21nfca_tm_recv_atr_req(struct nfc_hci_dev *hdev, 189 struct sk_buff *skb) 190 { 191 struct st21nfca_atr_req *atr_req; 192 size_t gb_len; 193 int r; 194 195 skb_trim(skb, skb->len - 1); 196 197 if (!skb->len) 198 return -EIO; 199 200 if (skb->len < ST21NFCA_ATR_REQ_MIN_SIZE) 201 return -EPROTO; 202 203 atr_req = (struct st21nfca_atr_req *)skb->data; 204 205 if (atr_req->length < sizeof(struct st21nfca_atr_req)) 206 return -EPROTO; 207 208 if (atr_req->length > skb->len) 209 return -EPROTO; 210 211 r = st21nfca_tm_send_atr_res(hdev, atr_req); 212 if (r) 213 return r; 214 215 gb_len = skb->len - sizeof(struct st21nfca_atr_req); 216 217 r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK, 218 NFC_COMM_PASSIVE, atr_req->gbi, gb_len); 219 if (r) 220 return r; 221 222 return 0; 223 } 224 225 static int st21nfca_tm_send_psl_res(struct nfc_hci_dev *hdev, 226 struct st21nfca_psl_req *psl_req) 227 { 228 struct st21nfca_psl_res *psl_res; 229 struct sk_buff *skb; 230 u8 bitrate[2] = {0, 0}; 231 int r; 232 233 skb = alloc_skb(sizeof(struct st21nfca_psl_res), GFP_KERNEL); 234 if (!skb) 235 return -ENOMEM; 236 skb_put(skb, sizeof(struct st21nfca_psl_res)); 237 238 psl_res = (struct st21nfca_psl_res *)skb->data; 239 240 psl_res->length = sizeof(struct st21nfca_psl_res); 241 psl_res->cmd0 = ST21NFCA_NFCIP1_RES; 242 psl_res->cmd1 = ST21NFCA_NFCIP1_PSL_RES; 243 psl_res->did = psl_req->did; 244 245 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 246 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); 247 if (r < 0) 248 goto error; 249 250 /* 251 * ST21NFCA only support P2P passive. 252 * PSL_REQ BRS value != 0 has only a meaning to 253 * change technology to type F. 254 * We change to BITRATE 424Kbits. 255 * In other case switch to BITRATE 106Kbits. 256 */ 257 if (ST21NFCA_PSL_REQ_SEND_SPEED(psl_req->brs) && 258 ST21NFCA_PSL_REQ_RECV_SPEED(psl_req->brs)) { 259 bitrate[0] = ST21NFCA_CARD_BITRATE_424; 260 bitrate[1] = ST21NFCA_CARD_BITRATE_424; 261 } 262 263 /* Send an event to change bitrate change event to card f */ 264 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 265 ST21NFCA_EVT_CARD_F_BITRATE, bitrate, 2); 266 error: 267 kfree_skb(skb); 268 return r; 269 } 270 271 static int st21nfca_tm_recv_psl_req(struct nfc_hci_dev *hdev, 272 struct sk_buff *skb) 273 { 274 struct st21nfca_psl_req *psl_req; 275 276 skb_trim(skb, skb->len - 1); 277 278 if (!skb->len) 279 return -EIO; 280 281 psl_req = (struct st21nfca_psl_req *)skb->data; 282 283 if (skb->len < sizeof(struct st21nfca_psl_req)) 284 return -EIO; 285 286 return st21nfca_tm_send_psl_res(hdev, psl_req); 287 } 288 289 int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb) 290 { 291 int r; 292 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 293 294 *(u8 *)skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; 295 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_RES; 296 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_RES; 297 *(u8 *)skb_push(skb, 1) = skb->len; 298 299 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 300 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); 301 kfree_skb(skb); 302 303 return r; 304 } 305 EXPORT_SYMBOL(st21nfca_tm_send_dep_res); 306 307 static int st21nfca_tm_recv_dep_req(struct nfc_hci_dev *hdev, 308 struct sk_buff *skb) 309 { 310 struct st21nfca_dep_req_res *dep_req; 311 u8 size; 312 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 313 314 skb_trim(skb, skb->len - 1); 315 316 size = 4; 317 318 dep_req = (struct st21nfca_dep_req_res *)skb->data; 319 if (skb->len < size) 320 return -EIO; 321 322 if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_req->pfb)) 323 size++; 324 if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_req->pfb)) 325 size++; 326 327 if (skb->len < size) 328 return -EIO; 329 330 /* Receiving DEP_REQ - Decoding */ 331 switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_req->pfb)) { 332 case ST21NFCA_NFC_DEP_PFB_I_PDU: 333 info->dep_info.curr_nfc_dep_pni = 334 ST21NFCA_NFC_DEP_PFB_PNI(dep_req->pfb); 335 break; 336 case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: 337 pr_err("Received a ACK/NACK PDU\n"); 338 break; 339 case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: 340 pr_err("Received a SUPERVISOR PDU\n"); 341 break; 342 } 343 344 skb_pull(skb, size); 345 346 return nfc_tm_data_received(hdev->ndev, skb); 347 } 348 349 static int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev, 350 struct sk_buff *skb) 351 { 352 u8 cmd0, cmd1; 353 int r; 354 355 cmd0 = skb->data[1]; 356 switch (cmd0) { 357 case ST21NFCA_NFCIP1_REQ: 358 cmd1 = skb->data[2]; 359 switch (cmd1) { 360 case ST21NFCA_NFCIP1_ATR_REQ: 361 r = st21nfca_tm_recv_atr_req(hdev, skb); 362 break; 363 case ST21NFCA_NFCIP1_PSL_REQ: 364 r = st21nfca_tm_recv_psl_req(hdev, skb); 365 break; 366 case ST21NFCA_NFCIP1_DEP_REQ: 367 r = st21nfca_tm_recv_dep_req(hdev, skb); 368 break; 369 default: 370 return 1; 371 } 372 break; 373 default: 374 return 1; 375 } 376 return r; 377 } 378 379 /* 380 * Returns: 381 * <= 0: driver handled the event, skb consumed 382 * 1: driver does not handle the event, please do standard processing 383 */ 384 int st21nfca_dep_event_received(struct nfc_hci_dev *hdev, 385 u8 event, struct sk_buff *skb) 386 { 387 int r = 0; 388 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 389 390 pr_debug("dep event: %d\n", event); 391 392 switch (event) { 393 case ST21NFCA_EVT_CARD_ACTIVATED: 394 info->dep_info.curr_nfc_dep_pni = 0; 395 break; 396 case ST21NFCA_EVT_CARD_DEACTIVATED: 397 break; 398 case ST21NFCA_EVT_FIELD_ON: 399 break; 400 case ST21NFCA_EVT_FIELD_OFF: 401 break; 402 case ST21NFCA_EVT_SEND_DATA: 403 r = st21nfca_tm_event_send_data(hdev, skb); 404 if (r < 0) 405 return r; 406 return 0; 407 default: 408 nfc_err(&hdev->ndev->dev, "Unexpected event on card f gate\n"); 409 return 1; 410 } 411 kfree_skb(skb); 412 return r; 413 } 414 EXPORT_SYMBOL(st21nfca_dep_event_received); 415 416 static void st21nfca_im_send_psl_req(struct nfc_hci_dev *hdev, u8 did, u8 bsi, 417 u8 bri, u8 lri) 418 { 419 struct sk_buff *skb; 420 struct st21nfca_psl_req *psl_req; 421 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 422 423 skb = 424 alloc_skb(sizeof(struct st21nfca_psl_req) + 1, GFP_KERNEL); 425 if (!skb) 426 return; 427 skb_reserve(skb, 1); 428 429 skb_put(skb, sizeof(struct st21nfca_psl_req)); 430 psl_req = (struct st21nfca_psl_req *) skb->data; 431 432 psl_req->length = sizeof(struct st21nfca_psl_req); 433 psl_req->cmd0 = ST21NFCA_NFCIP1_REQ; 434 psl_req->cmd1 = ST21NFCA_NFCIP1_PSL_REQ; 435 psl_req->did = did; 436 psl_req->brs = (0x30 & bsi << 4) | (bri & 0x03); 437 psl_req->fsl = lri; 438 439 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; 440 441 st21nfca_im_send_pdu(info, skb); 442 } 443 444 #define ST21NFCA_CB_TYPE_READER_F 1 445 static void st21nfca_im_recv_atr_res_cb(void *context, struct sk_buff *skb, 446 int err) 447 { 448 struct st21nfca_hci_info *info = context; 449 struct st21nfca_atr_res *atr_res; 450 int r; 451 452 if (err != 0) 453 return; 454 455 if (!skb) 456 return; 457 458 switch (info->async_cb_type) { 459 case ST21NFCA_CB_TYPE_READER_F: 460 skb_trim(skb, skb->len - 1); 461 atr_res = (struct st21nfca_atr_res *)skb->data; 462 r = nfc_set_remote_general_bytes(info->hdev->ndev, 463 atr_res->gbi, 464 skb->len - sizeof(struct st21nfca_atr_res)); 465 if (r < 0) 466 return; 467 468 if (atr_res->to >= 0x0e) 469 info->dep_info.to = 0x0e; 470 else 471 info->dep_info.to = atr_res->to + 1; 472 473 info->dep_info.to |= 0x10; 474 475 r = nfc_dep_link_is_up(info->hdev->ndev, info->dep_info.idx, 476 NFC_COMM_PASSIVE, NFC_RF_INITIATOR); 477 if (r < 0) 478 return; 479 480 info->dep_info.curr_nfc_dep_pni = 0; 481 if (ST21NFCA_PP2LRI(atr_res->ppi) != info->dep_info.lri) 482 st21nfca_im_send_psl_req(info->hdev, atr_res->did, 483 atr_res->bsi, atr_res->bri, 484 ST21NFCA_PP2LRI(atr_res->ppi)); 485 break; 486 default: 487 kfree_skb(skb); 488 break; 489 } 490 } 491 492 int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len) 493 { 494 struct sk_buff *skb; 495 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 496 struct st21nfca_atr_req *atr_req; 497 struct nfc_target *target; 498 uint size; 499 500 info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; 501 size = ST21NFCA_ATR_REQ_MIN_SIZE + gb_len; 502 if (size > ST21NFCA_ATR_REQ_MAX_SIZE) { 503 PROTOCOL_ERR("14.6.1.1"); 504 return -EINVAL; 505 } 506 507 skb = 508 alloc_skb(sizeof(struct st21nfca_atr_req) + gb_len + 1, GFP_KERNEL); 509 if (!skb) 510 return -ENOMEM; 511 512 skb_reserve(skb, 1); 513 514 skb_put(skb, sizeof(struct st21nfca_atr_req)); 515 516 atr_req = (struct st21nfca_atr_req *)skb->data; 517 memset(atr_req, 0, sizeof(struct st21nfca_atr_req)); 518 519 atr_req->cmd0 = ST21NFCA_NFCIP1_REQ; 520 atr_req->cmd1 = ST21NFCA_NFCIP1_ATR_REQ; 521 memset(atr_req->nfcid3, 0, NFC_NFCID3_MAXSIZE); 522 target = hdev->ndev->targets; 523 524 if (target->sensf_res_len > 0) 525 memcpy(atr_req->nfcid3, target->sensf_res, 526 target->sensf_res_len); 527 else 528 get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE); 529 530 atr_req->did = 0x0; 531 532 atr_req->bsi = 0x00; 533 atr_req->bri = 0x00; 534 atr_req->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; 535 if (gb_len) { 536 atr_req->ppi |= ST21NFCA_GB_BIT; 537 skb_put_data(skb, gb, gb_len); 538 } 539 atr_req->length = sizeof(struct st21nfca_atr_req) + hdev->gb_len; 540 541 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; /* timeout */ 542 543 info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; 544 info->async_cb_context = info; 545 info->async_cb = st21nfca_im_recv_atr_res_cb; 546 info->dep_info.bri = atr_req->bri; 547 info->dep_info.bsi = atr_req->bsi; 548 info->dep_info.lri = ST21NFCA_PP2LRI(atr_req->ppi); 549 550 return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, 551 ST21NFCA_WR_XCHG_DATA, skb->data, 552 skb->len, info->async_cb, info); 553 } 554 EXPORT_SYMBOL(st21nfca_im_send_atr_req); 555 556 static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb, 557 int err) 558 { 559 struct st21nfca_hci_info *info = context; 560 struct st21nfca_dep_req_res *dep_res; 561 562 int size; 563 564 if (err != 0) 565 return; 566 567 if (!skb) 568 return; 569 570 switch (info->async_cb_type) { 571 case ST21NFCA_CB_TYPE_READER_F: 572 dep_res = (struct st21nfca_dep_req_res *)skb->data; 573 574 size = 3; 575 if (skb->len < size) 576 goto exit; 577 578 if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_res->pfb)) 579 size++; 580 if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_res->pfb)) 581 size++; 582 583 if (skb->len < size) 584 goto exit; 585 586 skb_trim(skb, skb->len - 1); 587 588 /* Receiving DEP_REQ - Decoding */ 589 switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) { 590 case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: 591 pr_err("Received a ACK/NACK PDU\n"); 592 fallthrough; 593 case ST21NFCA_NFC_DEP_PFB_I_PDU: 594 info->dep_info.curr_nfc_dep_pni = 595 ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1); 596 size++; 597 skb_pull(skb, size); 598 nfc_tm_data_received(info->hdev->ndev, skb); 599 break; 600 case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: 601 pr_err("Received a SUPERVISOR PDU\n"); 602 skb_pull(skb, size); 603 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; 604 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; 605 *(u8 *)skb_push(skb, 1) = skb->len; 606 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; 607 608 st21nfca_im_send_pdu(info, skb); 609 break; 610 } 611 612 return; 613 default: 614 break; 615 } 616 617 exit: 618 kfree_skb(skb); 619 } 620 621 int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb) 622 { 623 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 624 625 info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; 626 info->async_cb_context = info; 627 info->async_cb = st21nfca_im_recv_dep_res_cb; 628 629 *(u8 *)skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; 630 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; 631 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; 632 *(u8 *)skb_push(skb, 1) = skb->len; 633 634 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; 635 636 return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, 637 ST21NFCA_WR_XCHG_DATA, 638 skb->data, skb->len, 639 info->async_cb, info); 640 } 641 EXPORT_SYMBOL(st21nfca_im_send_dep_req); 642 643 void st21nfca_dep_init(struct nfc_hci_dev *hdev) 644 { 645 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 646 647 INIT_WORK(&info->dep_info.tx_work, st21nfca_tx_work); 648 info->dep_info.curr_nfc_dep_pni = 0; 649 info->dep_info.idx = 0; 650 info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; 651 } 652 EXPORT_SYMBOL(st21nfca_dep_init); 653 654 void st21nfca_dep_deinit(struct nfc_hci_dev *hdev) 655 { 656 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 657 658 cancel_work_sync(&info->dep_info.tx_work); 659 } 660 EXPORT_SYMBOL(st21nfca_dep_deinit); 661