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 60struct 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 72struct 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 85struct st21nfca_psl_req { 86 u8 length; 87 u8 cmd0; 88 u8 cmd1; 89 u8 did; 90 u8 brs; 91 u8 fsl; 92} __packed; 93 94struct st21nfca_psl_res { 95 u8 length; 96 u8 cmd0; 97 u8 cmd1; 98 u8 did; 99} __packed; 100 101struct 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 110static 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 if (info) { 120 dev = info->hdev->ndev; 121 skb = info->dep_info.tx_pending; 122 123 device_lock(&dev->dev); 124 125 nfc_hci_send_cmd_async(info->hdev, ST21NFCA_RF_READER_F_GATE, 126 ST21NFCA_WR_XCHG_DATA, skb->data, skb->len, 127 info->async_cb, info); 128 device_unlock(&dev->dev); 129 kfree_skb(skb); 130 } 131} 132 133static void st21nfca_im_send_pdu(struct st21nfca_hci_info *info, 134 struct sk_buff *skb) 135{ 136 info->dep_info.tx_pending = skb; 137 schedule_work(&info->dep_info.tx_work); 138} 139 140static int st21nfca_tm_send_atr_res(struct nfc_hci_dev *hdev, 141 struct st21nfca_atr_req *atr_req) 142{ 143 struct st21nfca_atr_res *atr_res; 144 struct sk_buff *skb; 145 size_t gb_len; 146 int r; 147 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 148 149 gb_len = atr_req->length - sizeof(struct st21nfca_atr_req); 150 skb = alloc_skb(atr_req->length + 1, GFP_KERNEL); 151 if (!skb) 152 return -ENOMEM; 153 154 skb_put(skb, sizeof(struct st21nfca_atr_res)); 155 156 atr_res = (struct st21nfca_atr_res *)skb->data; 157 memset(atr_res, 0, sizeof(struct st21nfca_atr_res)); 158 159 atr_res->length = atr_req->length + 1; 160 atr_res->cmd0 = ST21NFCA_NFCIP1_RES; 161 atr_res->cmd1 = ST21NFCA_NFCIP1_ATR_RES; 162 163 memcpy(atr_res->nfcid3, atr_req->nfcid3, 6); 164 atr_res->bsi = 0x00; 165 atr_res->bri = 0x00; 166 atr_res->to = ST21NFCA_DEFAULT_TIMEOUT; 167 atr_res->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; 168 169 if (gb_len) { 170 skb_put(skb, gb_len); 171 172 atr_res->ppi |= ST21NFCA_GB_BIT; 173 memcpy(atr_res->gbi, atr_req->gbi, gb_len); 174 r = nfc_set_remote_general_bytes(hdev->ndev, atr_res->gbi, 175 gb_len); 176 if (r < 0) { 177 kfree_skb(skb); 178 return r; 179 } 180 } 181 182 info->dep_info.curr_nfc_dep_pni = 0; 183 184 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 185 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); 186 kfree_skb(skb); 187 return r; 188} 189 190static int st21nfca_tm_recv_atr_req(struct nfc_hci_dev *hdev, 191 struct sk_buff *skb) 192{ 193 struct st21nfca_atr_req *atr_req; 194 size_t gb_len; 195 int r; 196 197 skb_trim(skb, skb->len - 1); 198 199 if (!skb->len) { 200 r = -EIO; 201 goto exit; 202 } 203 204 if (skb->len < ST21NFCA_ATR_REQ_MIN_SIZE) { 205 r = -EPROTO; 206 goto exit; 207 } 208 209 atr_req = (struct st21nfca_atr_req *)skb->data; 210 211 if (atr_req->length < sizeof(struct st21nfca_atr_req)) { 212 r = -EPROTO; 213 goto exit; 214 } 215 216 r = st21nfca_tm_send_atr_res(hdev, atr_req); 217 if (r) 218 goto exit; 219 220 gb_len = skb->len - sizeof(struct st21nfca_atr_req); 221 222 r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK, 223 NFC_COMM_PASSIVE, atr_req->gbi, gb_len); 224 if (r) 225 goto exit; 226 227 r = 0; 228 229exit: 230 return r; 231} 232 233static int st21nfca_tm_send_psl_res(struct nfc_hci_dev *hdev, 234 struct st21nfca_psl_req *psl_req) 235{ 236 struct st21nfca_psl_res *psl_res; 237 struct sk_buff *skb; 238 u8 bitrate[2] = {0, 0}; 239 int r; 240 241 skb = alloc_skb(sizeof(struct st21nfca_psl_res), GFP_KERNEL); 242 if (!skb) 243 return -ENOMEM; 244 skb_put(skb, sizeof(struct st21nfca_psl_res)); 245 246 psl_res = (struct st21nfca_psl_res *)skb->data; 247 248 psl_res->length = sizeof(struct st21nfca_psl_res); 249 psl_res->cmd0 = ST21NFCA_NFCIP1_RES; 250 psl_res->cmd1 = ST21NFCA_NFCIP1_PSL_RES; 251 psl_res->did = psl_req->did; 252 253 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 254 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); 255 if (r < 0) 256 goto error; 257 258 /* 259 * ST21NFCA only support P2P passive. 260 * PSL_REQ BRS value != 0 has only a meaning to 261 * change technology to type F. 262 * We change to BITRATE 424Kbits. 263 * In other case switch to BITRATE 106Kbits. 264 */ 265 if (ST21NFCA_PSL_REQ_SEND_SPEED(psl_req->brs) && 266 ST21NFCA_PSL_REQ_RECV_SPEED(psl_req->brs)) { 267 bitrate[0] = ST21NFCA_CARD_BITRATE_424; 268 bitrate[1] = ST21NFCA_CARD_BITRATE_424; 269 } 270 271 /* Send an event to change bitrate change event to card f */ 272 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 273 ST21NFCA_EVT_CARD_F_BITRATE, bitrate, 2); 274error: 275 kfree_skb(skb); 276 return r; 277} 278 279static int st21nfca_tm_recv_psl_req(struct nfc_hci_dev *hdev, 280 struct sk_buff *skb) 281{ 282 struct st21nfca_psl_req *psl_req; 283 int r; 284 285 skb_trim(skb, skb->len - 1); 286 287 if (!skb->len) { 288 r = -EIO; 289 goto exit; 290 } 291 292 psl_req = (struct st21nfca_psl_req *)skb->data; 293 294 if (skb->len < sizeof(struct st21nfca_psl_req)) { 295 r = -EIO; 296 goto exit; 297 } 298 299 r = st21nfca_tm_send_psl_res(hdev, psl_req); 300exit: 301 return r; 302} 303 304int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb) 305{ 306 int r; 307 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 308 309 *(u8 *)skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; 310 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_RES; 311 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_RES; 312 *(u8 *)skb_push(skb, 1) = skb->len; 313 314 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 315 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); 316 kfree_skb(skb); 317 318 return r; 319} 320EXPORT_SYMBOL(st21nfca_tm_send_dep_res); 321 322static int st21nfca_tm_recv_dep_req(struct nfc_hci_dev *hdev, 323 struct sk_buff *skb) 324{ 325 struct st21nfca_dep_req_res *dep_req; 326 u8 size; 327 int r; 328 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 329 330 skb_trim(skb, skb->len - 1); 331 332 size = 4; 333 334 dep_req = (struct st21nfca_dep_req_res *)skb->data; 335 if (skb->len < size) { 336 r = -EIO; 337 goto exit; 338 } 339 340 if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_req->pfb)) 341 size++; 342 if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_req->pfb)) 343 size++; 344 345 if (skb->len < size) { 346 r = -EIO; 347 goto exit; 348 } 349 350 /* Receiving DEP_REQ - Decoding */ 351 switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_req->pfb)) { 352 case ST21NFCA_NFC_DEP_PFB_I_PDU: 353 info->dep_info.curr_nfc_dep_pni = 354 ST21NFCA_NFC_DEP_PFB_PNI(dep_req->pfb); 355 break; 356 case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: 357 pr_err("Received a ACK/NACK PDU\n"); 358 break; 359 case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: 360 pr_err("Received a SUPERVISOR PDU\n"); 361 break; 362 } 363 364 skb_pull(skb, size); 365 366 return nfc_tm_data_received(hdev->ndev, skb); 367exit: 368 return r; 369} 370 371static int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev, 372 struct sk_buff *skb) 373{ 374 u8 cmd0, cmd1; 375 int r; 376 377 cmd0 = skb->data[1]; 378 switch (cmd0) { 379 case ST21NFCA_NFCIP1_REQ: 380 cmd1 = skb->data[2]; 381 switch (cmd1) { 382 case ST21NFCA_NFCIP1_ATR_REQ: 383 r = st21nfca_tm_recv_atr_req(hdev, skb); 384 break; 385 case ST21NFCA_NFCIP1_PSL_REQ: 386 r = st21nfca_tm_recv_psl_req(hdev, skb); 387 break; 388 case ST21NFCA_NFCIP1_DEP_REQ: 389 r = st21nfca_tm_recv_dep_req(hdev, skb); 390 break; 391 default: 392 return 1; 393 } 394 break; 395 default: 396 return 1; 397 } 398 return r; 399} 400 401/* 402 * Returns: 403 * <= 0: driver handled the event, skb consumed 404 * 1: driver does not handle the event, please do standard processing 405 */ 406int st21nfca_dep_event_received(struct nfc_hci_dev *hdev, 407 u8 event, struct sk_buff *skb) 408{ 409 int r = 0; 410 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 411 412 pr_debug("dep event: %d\n", event); 413 414 switch (event) { 415 case ST21NFCA_EVT_CARD_ACTIVATED: 416 info->dep_info.curr_nfc_dep_pni = 0; 417 break; 418 case ST21NFCA_EVT_CARD_DEACTIVATED: 419 break; 420 case ST21NFCA_EVT_FIELD_ON: 421 break; 422 case ST21NFCA_EVT_FIELD_OFF: 423 break; 424 case ST21NFCA_EVT_SEND_DATA: 425 r = st21nfca_tm_event_send_data(hdev, skb); 426 if (r < 0) 427 return r; 428 return 0; 429 default: 430 nfc_err(&hdev->ndev->dev, "Unexpected event on card f gate\n"); 431 return 1; 432 } 433 kfree_skb(skb); 434 return r; 435} 436EXPORT_SYMBOL(st21nfca_dep_event_received); 437 438static void st21nfca_im_send_psl_req(struct nfc_hci_dev *hdev, u8 did, u8 bsi, 439 u8 bri, u8 lri) 440{ 441 struct sk_buff *skb; 442 struct st21nfca_psl_req *psl_req; 443 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 444 445 skb = 446 alloc_skb(sizeof(struct st21nfca_psl_req) + 1, GFP_KERNEL); 447 if (!skb) 448 return; 449 skb_reserve(skb, 1); 450 451 skb_put(skb, sizeof(struct st21nfca_psl_req)); 452 psl_req = (struct st21nfca_psl_req *) skb->data; 453 454 psl_req->length = sizeof(struct st21nfca_psl_req); 455 psl_req->cmd0 = ST21NFCA_NFCIP1_REQ; 456 psl_req->cmd1 = ST21NFCA_NFCIP1_PSL_REQ; 457 psl_req->did = did; 458 psl_req->brs = (0x30 & bsi << 4) | (bri & 0x03); 459 psl_req->fsl = lri; 460 461 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; 462 463 st21nfca_im_send_pdu(info, skb); 464} 465 466#define ST21NFCA_CB_TYPE_READER_F 1 467static void st21nfca_im_recv_atr_res_cb(void *context, struct sk_buff *skb, 468 int err) 469{ 470 struct st21nfca_hci_info *info = context; 471 struct st21nfca_atr_res *atr_res; 472 int r; 473 474 if (err != 0) 475 return; 476 477 if (!skb) 478 return; 479 480 switch (info->async_cb_type) { 481 case ST21NFCA_CB_TYPE_READER_F: 482 skb_trim(skb, skb->len - 1); 483 atr_res = (struct st21nfca_atr_res *)skb->data; 484 r = nfc_set_remote_general_bytes(info->hdev->ndev, 485 atr_res->gbi, 486 skb->len - sizeof(struct st21nfca_atr_res)); 487 if (r < 0) 488 return; 489 490 if (atr_res->to >= 0x0e) 491 info->dep_info.to = 0x0e; 492 else 493 info->dep_info.to = atr_res->to + 1; 494 495 info->dep_info.to |= 0x10; 496 497 r = nfc_dep_link_is_up(info->hdev->ndev, info->dep_info.idx, 498 NFC_COMM_PASSIVE, NFC_RF_INITIATOR); 499 if (r < 0) 500 return; 501 502 info->dep_info.curr_nfc_dep_pni = 0; 503 if (ST21NFCA_PP2LRI(atr_res->ppi) != info->dep_info.lri) 504 st21nfca_im_send_psl_req(info->hdev, atr_res->did, 505 atr_res->bsi, atr_res->bri, 506 ST21NFCA_PP2LRI(atr_res->ppi)); 507 break; 508 default: 509 kfree_skb(skb); 510 break; 511 } 512} 513 514int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len) 515{ 516 struct sk_buff *skb; 517 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 518 struct st21nfca_atr_req *atr_req; 519 struct nfc_target *target; 520 uint size; 521 522 info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; 523 size = ST21NFCA_ATR_REQ_MIN_SIZE + gb_len; 524 if (size > ST21NFCA_ATR_REQ_MAX_SIZE) { 525 PROTOCOL_ERR("14.6.1.1"); 526 return -EINVAL; 527 } 528 529 skb = 530 alloc_skb(sizeof(struct st21nfca_atr_req) + gb_len + 1, GFP_KERNEL); 531 if (!skb) 532 return -ENOMEM; 533 534 skb_reserve(skb, 1); 535 536 skb_put(skb, sizeof(struct st21nfca_atr_req)); 537 538 atr_req = (struct st21nfca_atr_req *)skb->data; 539 memset(atr_req, 0, sizeof(struct st21nfca_atr_req)); 540 541 atr_req->cmd0 = ST21NFCA_NFCIP1_REQ; 542 atr_req->cmd1 = ST21NFCA_NFCIP1_ATR_REQ; 543 memset(atr_req->nfcid3, 0, NFC_NFCID3_MAXSIZE); 544 target = hdev->ndev->targets; 545 546 if (target->sensf_res_len > 0) 547 memcpy(atr_req->nfcid3, target->sensf_res, 548 target->sensf_res_len); 549 else 550 get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE); 551 552 atr_req->did = 0x0; 553 554 atr_req->bsi = 0x00; 555 atr_req->bri = 0x00; 556 atr_req->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; 557 if (gb_len) { 558 atr_req->ppi |= ST21NFCA_GB_BIT; 559 skb_put_data(skb, gb, gb_len); 560 } 561 atr_req->length = sizeof(struct st21nfca_atr_req) + hdev->gb_len; 562 563 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; /* timeout */ 564 565 info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; 566 info->async_cb_context = info; 567 info->async_cb = st21nfca_im_recv_atr_res_cb; 568 info->dep_info.bri = atr_req->bri; 569 info->dep_info.bsi = atr_req->bsi; 570 info->dep_info.lri = ST21NFCA_PP2LRI(atr_req->ppi); 571 572 return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, 573 ST21NFCA_WR_XCHG_DATA, skb->data, 574 skb->len, info->async_cb, info); 575} 576EXPORT_SYMBOL(st21nfca_im_send_atr_req); 577 578static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb, 579 int err) 580{ 581 struct st21nfca_hci_info *info = context; 582 struct st21nfca_dep_req_res *dep_res; 583 584 int size; 585 586 if (err != 0) 587 return; 588 589 if (!skb) 590 return; 591 592 switch (info->async_cb_type) { 593 case ST21NFCA_CB_TYPE_READER_F: 594 dep_res = (struct st21nfca_dep_req_res *)skb->data; 595 596 size = 3; 597 if (skb->len < size) 598 goto exit; 599 600 if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_res->pfb)) 601 size++; 602 if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_res->pfb)) 603 size++; 604 605 if (skb->len < size) 606 goto exit; 607 608 skb_trim(skb, skb->len - 1); 609 610 /* Receiving DEP_REQ - Decoding */ 611 switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) { 612 case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: 613 pr_err("Received a ACK/NACK PDU\n"); 614 fallthrough; 615 case ST21NFCA_NFC_DEP_PFB_I_PDU: 616 info->dep_info.curr_nfc_dep_pni = 617 ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1); 618 size++; 619 skb_pull(skb, size); 620 nfc_tm_data_received(info->hdev->ndev, skb); 621 break; 622 case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: 623 pr_err("Received a SUPERVISOR PDU\n"); 624 skb_pull(skb, size); 625 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; 626 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; 627 *(u8 *)skb_push(skb, 1) = skb->len; 628 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; 629 630 st21nfca_im_send_pdu(info, skb); 631 break; 632 } 633 634 return; 635 default: 636 break; 637 } 638 639exit: 640 kfree_skb(skb); 641} 642 643int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb) 644{ 645 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 646 647 info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; 648 info->async_cb_context = info; 649 info->async_cb = st21nfca_im_recv_dep_res_cb; 650 651 *(u8 *)skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; 652 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; 653 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; 654 *(u8 *)skb_push(skb, 1) = skb->len; 655 656 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; 657 658 return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, 659 ST21NFCA_WR_XCHG_DATA, 660 skb->data, skb->len, 661 info->async_cb, info); 662} 663EXPORT_SYMBOL(st21nfca_im_send_dep_req); 664 665void st21nfca_dep_init(struct nfc_hci_dev *hdev) 666{ 667 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 668 669 INIT_WORK(&info->dep_info.tx_work, st21nfca_tx_work); 670 info->dep_info.curr_nfc_dep_pni = 0; 671 info->dep_info.idx = 0; 672 info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; 673} 674EXPORT_SYMBOL(st21nfca_dep_init); 675 676void st21nfca_dep_deinit(struct nfc_hci_dev *hdev) 677{ 678 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 679 680 cancel_work_sync(&info->dep_info.tx_work); 681} 682EXPORT_SYMBOL(st21nfca_dep_deinit); 683