dep.c (16028B)
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 return -EIO; 201 202 if (skb->len < ST21NFCA_ATR_REQ_MIN_SIZE) 203 return -EPROTO; 204 205 atr_req = (struct st21nfca_atr_req *)skb->data; 206 207 if (atr_req->length < sizeof(struct st21nfca_atr_req)) 208 return -EPROTO; 209 210 r = st21nfca_tm_send_atr_res(hdev, atr_req); 211 if (r) 212 return r; 213 214 gb_len = skb->len - sizeof(struct st21nfca_atr_req); 215 216 r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK, 217 NFC_COMM_PASSIVE, atr_req->gbi, gb_len); 218 if (r) 219 return r; 220 221 return 0; 222} 223 224static int st21nfca_tm_send_psl_res(struct nfc_hci_dev *hdev, 225 struct st21nfca_psl_req *psl_req) 226{ 227 struct st21nfca_psl_res *psl_res; 228 struct sk_buff *skb; 229 u8 bitrate[2] = {0, 0}; 230 int r; 231 232 skb = alloc_skb(sizeof(struct st21nfca_psl_res), GFP_KERNEL); 233 if (!skb) 234 return -ENOMEM; 235 skb_put(skb, sizeof(struct st21nfca_psl_res)); 236 237 psl_res = (struct st21nfca_psl_res *)skb->data; 238 239 psl_res->length = sizeof(struct st21nfca_psl_res); 240 psl_res->cmd0 = ST21NFCA_NFCIP1_RES; 241 psl_res->cmd1 = ST21NFCA_NFCIP1_PSL_RES; 242 psl_res->did = psl_req->did; 243 244 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 245 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); 246 if (r < 0) 247 goto error; 248 249 /* 250 * ST21NFCA only support P2P passive. 251 * PSL_REQ BRS value != 0 has only a meaning to 252 * change technology to type F. 253 * We change to BITRATE 424Kbits. 254 * In other case switch to BITRATE 106Kbits. 255 */ 256 if (ST21NFCA_PSL_REQ_SEND_SPEED(psl_req->brs) && 257 ST21NFCA_PSL_REQ_RECV_SPEED(psl_req->brs)) { 258 bitrate[0] = ST21NFCA_CARD_BITRATE_424; 259 bitrate[1] = ST21NFCA_CARD_BITRATE_424; 260 } 261 262 /* Send an event to change bitrate change event to card f */ 263 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 264 ST21NFCA_EVT_CARD_F_BITRATE, bitrate, 2); 265error: 266 kfree_skb(skb); 267 return r; 268} 269 270static int st21nfca_tm_recv_psl_req(struct nfc_hci_dev *hdev, 271 struct sk_buff *skb) 272{ 273 struct st21nfca_psl_req *psl_req; 274 275 skb_trim(skb, skb->len - 1); 276 277 if (!skb->len) 278 return -EIO; 279 280 psl_req = (struct st21nfca_psl_req *)skb->data; 281 282 if (skb->len < sizeof(struct st21nfca_psl_req)) 283 return -EIO; 284 285 return st21nfca_tm_send_psl_res(hdev, psl_req); 286} 287 288int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb) 289{ 290 int r; 291 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 292 293 *(u8 *)skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; 294 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_RES; 295 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_RES; 296 *(u8 *)skb_push(skb, 1) = skb->len; 297 298 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 299 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); 300 kfree_skb(skb); 301 302 return r; 303} 304EXPORT_SYMBOL(st21nfca_tm_send_dep_res); 305 306static int st21nfca_tm_recv_dep_req(struct nfc_hci_dev *hdev, 307 struct sk_buff *skb) 308{ 309 struct st21nfca_dep_req_res *dep_req; 310 u8 size; 311 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 312 313 skb_trim(skb, skb->len - 1); 314 315 size = 4; 316 317 dep_req = (struct st21nfca_dep_req_res *)skb->data; 318 if (skb->len < size) 319 return -EIO; 320 321 if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_req->pfb)) 322 size++; 323 if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_req->pfb)) 324 size++; 325 326 if (skb->len < size) 327 return -EIO; 328 329 /* Receiving DEP_REQ - Decoding */ 330 switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_req->pfb)) { 331 case ST21NFCA_NFC_DEP_PFB_I_PDU: 332 info->dep_info.curr_nfc_dep_pni = 333 ST21NFCA_NFC_DEP_PFB_PNI(dep_req->pfb); 334 break; 335 case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: 336 pr_err("Received a ACK/NACK PDU\n"); 337 break; 338 case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: 339 pr_err("Received a SUPERVISOR PDU\n"); 340 break; 341 } 342 343 skb_pull(skb, size); 344 345 return nfc_tm_data_received(hdev->ndev, skb); 346} 347 348static int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev, 349 struct sk_buff *skb) 350{ 351 u8 cmd0, cmd1; 352 int r; 353 354 cmd0 = skb->data[1]; 355 switch (cmd0) { 356 case ST21NFCA_NFCIP1_REQ: 357 cmd1 = skb->data[2]; 358 switch (cmd1) { 359 case ST21NFCA_NFCIP1_ATR_REQ: 360 r = st21nfca_tm_recv_atr_req(hdev, skb); 361 break; 362 case ST21NFCA_NFCIP1_PSL_REQ: 363 r = st21nfca_tm_recv_psl_req(hdev, skb); 364 break; 365 case ST21NFCA_NFCIP1_DEP_REQ: 366 r = st21nfca_tm_recv_dep_req(hdev, skb); 367 break; 368 default: 369 return 1; 370 } 371 break; 372 default: 373 return 1; 374 } 375 return r; 376} 377 378/* 379 * Returns: 380 * <= 0: driver handled the event, skb consumed 381 * 1: driver does not handle the event, please do standard processing 382 */ 383int st21nfca_dep_event_received(struct nfc_hci_dev *hdev, 384 u8 event, struct sk_buff *skb) 385{ 386 int r = 0; 387 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 388 389 pr_debug("dep event: %d\n", event); 390 391 switch (event) { 392 case ST21NFCA_EVT_CARD_ACTIVATED: 393 info->dep_info.curr_nfc_dep_pni = 0; 394 break; 395 case ST21NFCA_EVT_CARD_DEACTIVATED: 396 break; 397 case ST21NFCA_EVT_FIELD_ON: 398 break; 399 case ST21NFCA_EVT_FIELD_OFF: 400 break; 401 case ST21NFCA_EVT_SEND_DATA: 402 r = st21nfca_tm_event_send_data(hdev, skb); 403 if (r < 0) 404 return r; 405 return 0; 406 default: 407 nfc_err(&hdev->ndev->dev, "Unexpected event on card f gate\n"); 408 return 1; 409 } 410 kfree_skb(skb); 411 return r; 412} 413EXPORT_SYMBOL(st21nfca_dep_event_received); 414 415static void st21nfca_im_send_psl_req(struct nfc_hci_dev *hdev, u8 did, u8 bsi, 416 u8 bri, u8 lri) 417{ 418 struct sk_buff *skb; 419 struct st21nfca_psl_req *psl_req; 420 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 421 422 skb = 423 alloc_skb(sizeof(struct st21nfca_psl_req) + 1, GFP_KERNEL); 424 if (!skb) 425 return; 426 skb_reserve(skb, 1); 427 428 skb_put(skb, sizeof(struct st21nfca_psl_req)); 429 psl_req = (struct st21nfca_psl_req *) skb->data; 430 431 psl_req->length = sizeof(struct st21nfca_psl_req); 432 psl_req->cmd0 = ST21NFCA_NFCIP1_REQ; 433 psl_req->cmd1 = ST21NFCA_NFCIP1_PSL_REQ; 434 psl_req->did = did; 435 psl_req->brs = (0x30 & bsi << 4) | (bri & 0x03); 436 psl_req->fsl = lri; 437 438 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; 439 440 st21nfca_im_send_pdu(info, skb); 441} 442 443#define ST21NFCA_CB_TYPE_READER_F 1 444static void st21nfca_im_recv_atr_res_cb(void *context, struct sk_buff *skb, 445 int err) 446{ 447 struct st21nfca_hci_info *info = context; 448 struct st21nfca_atr_res *atr_res; 449 int r; 450 451 if (err != 0) 452 return; 453 454 if (!skb) 455 return; 456 457 switch (info->async_cb_type) { 458 case ST21NFCA_CB_TYPE_READER_F: 459 skb_trim(skb, skb->len - 1); 460 atr_res = (struct st21nfca_atr_res *)skb->data; 461 r = nfc_set_remote_general_bytes(info->hdev->ndev, 462 atr_res->gbi, 463 skb->len - sizeof(struct st21nfca_atr_res)); 464 if (r < 0) 465 return; 466 467 if (atr_res->to >= 0x0e) 468 info->dep_info.to = 0x0e; 469 else 470 info->dep_info.to = atr_res->to + 1; 471 472 info->dep_info.to |= 0x10; 473 474 r = nfc_dep_link_is_up(info->hdev->ndev, info->dep_info.idx, 475 NFC_COMM_PASSIVE, NFC_RF_INITIATOR); 476 if (r < 0) 477 return; 478 479 info->dep_info.curr_nfc_dep_pni = 0; 480 if (ST21NFCA_PP2LRI(atr_res->ppi) != info->dep_info.lri) 481 st21nfca_im_send_psl_req(info->hdev, atr_res->did, 482 atr_res->bsi, atr_res->bri, 483 ST21NFCA_PP2LRI(atr_res->ppi)); 484 break; 485 default: 486 kfree_skb(skb); 487 break; 488 } 489} 490 491int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len) 492{ 493 struct sk_buff *skb; 494 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 495 struct st21nfca_atr_req *atr_req; 496 struct nfc_target *target; 497 uint size; 498 499 info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; 500 size = ST21NFCA_ATR_REQ_MIN_SIZE + gb_len; 501 if (size > ST21NFCA_ATR_REQ_MAX_SIZE) { 502 PROTOCOL_ERR("14.6.1.1"); 503 return -EINVAL; 504 } 505 506 skb = 507 alloc_skb(sizeof(struct st21nfca_atr_req) + gb_len + 1, GFP_KERNEL); 508 if (!skb) 509 return -ENOMEM; 510 511 skb_reserve(skb, 1); 512 513 skb_put(skb, sizeof(struct st21nfca_atr_req)); 514 515 atr_req = (struct st21nfca_atr_req *)skb->data; 516 memset(atr_req, 0, sizeof(struct st21nfca_atr_req)); 517 518 atr_req->cmd0 = ST21NFCA_NFCIP1_REQ; 519 atr_req->cmd1 = ST21NFCA_NFCIP1_ATR_REQ; 520 memset(atr_req->nfcid3, 0, NFC_NFCID3_MAXSIZE); 521 target = hdev->ndev->targets; 522 523 if (target->sensf_res_len > 0) 524 memcpy(atr_req->nfcid3, target->sensf_res, 525 target->sensf_res_len); 526 else 527 get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE); 528 529 atr_req->did = 0x0; 530 531 atr_req->bsi = 0x00; 532 atr_req->bri = 0x00; 533 atr_req->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; 534 if (gb_len) { 535 atr_req->ppi |= ST21NFCA_GB_BIT; 536 skb_put_data(skb, gb, gb_len); 537 } 538 atr_req->length = sizeof(struct st21nfca_atr_req) + hdev->gb_len; 539 540 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; /* timeout */ 541 542 info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; 543 info->async_cb_context = info; 544 info->async_cb = st21nfca_im_recv_atr_res_cb; 545 info->dep_info.bri = atr_req->bri; 546 info->dep_info.bsi = atr_req->bsi; 547 info->dep_info.lri = ST21NFCA_PP2LRI(atr_req->ppi); 548 549 return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, 550 ST21NFCA_WR_XCHG_DATA, skb->data, 551 skb->len, info->async_cb, info); 552} 553EXPORT_SYMBOL(st21nfca_im_send_atr_req); 554 555static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb, 556 int err) 557{ 558 struct st21nfca_hci_info *info = context; 559 struct st21nfca_dep_req_res *dep_res; 560 561 int size; 562 563 if (err != 0) 564 return; 565 566 if (!skb) 567 return; 568 569 switch (info->async_cb_type) { 570 case ST21NFCA_CB_TYPE_READER_F: 571 dep_res = (struct st21nfca_dep_req_res *)skb->data; 572 573 size = 3; 574 if (skb->len < size) 575 goto exit; 576 577 if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_res->pfb)) 578 size++; 579 if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_res->pfb)) 580 size++; 581 582 if (skb->len < size) 583 goto exit; 584 585 skb_trim(skb, skb->len - 1); 586 587 /* Receiving DEP_REQ - Decoding */ 588 switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) { 589 case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: 590 pr_err("Received a ACK/NACK PDU\n"); 591 fallthrough; 592 case ST21NFCA_NFC_DEP_PFB_I_PDU: 593 info->dep_info.curr_nfc_dep_pni = 594 ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1); 595 size++; 596 skb_pull(skb, size); 597 nfc_tm_data_received(info->hdev->ndev, skb); 598 break; 599 case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: 600 pr_err("Received a SUPERVISOR PDU\n"); 601 skb_pull(skb, size); 602 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; 603 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; 604 *(u8 *)skb_push(skb, 1) = skb->len; 605 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; 606 607 st21nfca_im_send_pdu(info, skb); 608 break; 609 } 610 611 return; 612 default: 613 break; 614 } 615 616exit: 617 kfree_skb(skb); 618} 619 620int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb) 621{ 622 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 623 624 info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; 625 info->async_cb_context = info; 626 info->async_cb = st21nfca_im_recv_dep_res_cb; 627 628 *(u8 *)skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; 629 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; 630 *(u8 *)skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; 631 *(u8 *)skb_push(skb, 1) = skb->len; 632 633 *(u8 *)skb_push(skb, 1) = info->dep_info.to | 0x10; 634 635 return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, 636 ST21NFCA_WR_XCHG_DATA, 637 skb->data, skb->len, 638 info->async_cb, info); 639} 640EXPORT_SYMBOL(st21nfca_im_send_dep_req); 641 642void st21nfca_dep_init(struct nfc_hci_dev *hdev) 643{ 644 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 645 646 INIT_WORK(&info->dep_info.tx_work, st21nfca_tx_work); 647 info->dep_info.curr_nfc_dep_pni = 0; 648 info->dep_info.idx = 0; 649 info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; 650} 651EXPORT_SYMBOL(st21nfca_dep_init); 652 653void st21nfca_dep_deinit(struct nfc_hci_dev *hdev) 654{ 655 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 656 657 cancel_work_sync(&info->dep_info.tx_work); 658} 659EXPORT_SYMBOL(st21nfca_dep_deinit);