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