1/* 2 * Copyright (C) 2014 STMicroelectronics SAS. All rights reserved. 3 * 4 * This program is free software; you can redistribute it and/or modify it 5 * under the terms and conditions of the GNU General Public License, 6 * version 2, as published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 * 13 * You should have received a copy of the GNU General Public License 14 * along with this program; if not, see <http://www.gnu.org/licenses/>. 15 */ 16 17#include <net/nfc/hci.h> 18 19#include "st21nfca.h" 20 21#define ST21NFCA_NFCIP1_INITIATOR 0x00 22#define ST21NFCA_NFCIP1_REQ 0xd4 23#define ST21NFCA_NFCIP1_RES 0xd5 24#define ST21NFCA_NFCIP1_ATR_REQ 0x00 25#define ST21NFCA_NFCIP1_ATR_RES 0x01 26#define ST21NFCA_NFCIP1_PSL_REQ 0x04 27#define ST21NFCA_NFCIP1_PSL_RES 0x05 28#define ST21NFCA_NFCIP1_DEP_REQ 0x06 29#define ST21NFCA_NFCIP1_DEP_RES 0x07 30 31#define ST21NFCA_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03) 32#define ST21NFCA_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0) 33#define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ 34 ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT) 35#define ST21NFCA_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & 0x04) 36#define ST21NFCA_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08) 37#define ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT 0x10 38 39#define ST21NFCA_NFC_DEP_PFB_IS_TIMEOUT(pfb) \ 40 ((pfb) & ST21NFCA_NFC_DEP_PFB_TIMEOUT_BIT) 41 42#define ST21NFCA_NFC_DEP_PFB_I_PDU 0x00 43#define ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU 0x40 44#define ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU 0x80 45 46#define ST21NFCA_ATR_REQ_MIN_SIZE 17 47#define ST21NFCA_ATR_REQ_MAX_SIZE 65 48#define ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B 0x30 49#define ST21NFCA_GB_BIT 0x02 50 51#define ST21NFCA_EVT_SEND_DATA 0x10 52#define ST21NFCA_EVT_FIELD_ON 0x11 53#define ST21NFCA_EVT_CARD_DEACTIVATED 0x12 54#define ST21NFCA_EVT_CARD_ACTIVATED 0x13 55#define ST21NFCA_EVT_FIELD_OFF 0x14 56 57#define ST21NFCA_EVT_CARD_F_BITRATE 0x16 58#define ST21NFCA_EVT_READER_F_BITRATE 0x13 59#define ST21NFCA_PSL_REQ_SEND_SPEED(brs) (brs & 0x38) 60#define ST21NFCA_PSL_REQ_RECV_SPEED(brs) (brs & 0x07) 61#define ST21NFCA_PP2LRI(pp) ((pp & 0x30) >> 4) 62#define ST21NFCA_CARD_BITRATE_212 0x01 63#define ST21NFCA_CARD_BITRATE_424 0x02 64 65#define ST21NFCA_DEFAULT_TIMEOUT 0x0a 66 67 68#define PROTOCOL_ERR(req) pr_err("%d: ST21NFCA Protocol error: %s\n", \ 69 __LINE__, req) 70 71struct st21nfca_atr_req { 72 u8 length; 73 u8 cmd0; 74 u8 cmd1; 75 u8 nfcid3[NFC_NFCID3_MAXSIZE]; 76 u8 did; 77 u8 bsi; 78 u8 bri; 79 u8 ppi; 80 u8 gbi[0]; 81} __packed; 82 83struct st21nfca_atr_res { 84 u8 length; 85 u8 cmd0; 86 u8 cmd1; 87 u8 nfcid3[NFC_NFCID3_MAXSIZE]; 88 u8 did; 89 u8 bsi; 90 u8 bri; 91 u8 to; 92 u8 ppi; 93 u8 gbi[0]; 94} __packed; 95 96struct st21nfca_psl_req { 97 u8 length; 98 u8 cmd0; 99 u8 cmd1; 100 u8 did; 101 u8 brs; 102 u8 fsl; 103} __packed; 104 105struct st21nfca_psl_res { 106 u8 length; 107 u8 cmd0; 108 u8 cmd1; 109 u8 did; 110} __packed; 111 112struct st21nfca_dep_req_res { 113 u8 length; 114 u8 cmd0; 115 u8 cmd1; 116 u8 pfb; 117 u8 did; 118 u8 nad; 119} __packed; 120 121static void st21nfca_tx_work(struct work_struct *work) 122{ 123 struct st21nfca_hci_info *info = container_of(work, 124 struct st21nfca_hci_info, 125 dep_info.tx_work); 126 127 struct nfc_dev *dev; 128 struct sk_buff *skb; 129 130 if (info) { 131 dev = info->hdev->ndev; 132 skb = info->dep_info.tx_pending; 133 134 device_lock(&dev->dev); 135 136 nfc_hci_send_cmd_async(info->hdev, ST21NFCA_RF_READER_F_GATE, 137 ST21NFCA_WR_XCHG_DATA, skb->data, skb->len, 138 info->async_cb, info); 139 device_unlock(&dev->dev); 140 kfree_skb(skb); 141 } 142} 143 144static void st21nfca_im_send_pdu(struct st21nfca_hci_info *info, 145 struct sk_buff *skb) 146{ 147 info->dep_info.tx_pending = skb; 148 schedule_work(&info->dep_info.tx_work); 149} 150 151static int st21nfca_tm_send_atr_res(struct nfc_hci_dev *hdev, 152 struct st21nfca_atr_req *atr_req) 153{ 154 struct st21nfca_atr_res *atr_res; 155 struct sk_buff *skb; 156 size_t gb_len; 157 int r; 158 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 159 160 gb_len = atr_req->length - sizeof(struct st21nfca_atr_req); 161 skb = alloc_skb(atr_req->length + 1, GFP_KERNEL); 162 if (!skb) 163 return -ENOMEM; 164 165 skb_put(skb, sizeof(struct st21nfca_atr_res)); 166 167 atr_res = (struct st21nfca_atr_res *)skb->data; 168 memset(atr_res, 0, sizeof(struct st21nfca_atr_res)); 169 170 atr_res->length = atr_req->length + 1; 171 atr_res->cmd0 = ST21NFCA_NFCIP1_RES; 172 atr_res->cmd1 = ST21NFCA_NFCIP1_ATR_RES; 173 174 memcpy(atr_res->nfcid3, atr_req->nfcid3, 6); 175 atr_res->bsi = 0x00; 176 atr_res->bri = 0x00; 177 atr_res->to = ST21NFCA_DEFAULT_TIMEOUT; 178 atr_res->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; 179 180 if (gb_len) { 181 skb_put(skb, gb_len); 182 183 atr_res->ppi |= ST21NFCA_GB_BIT; 184 memcpy(atr_res->gbi, atr_req->gbi, gb_len); 185 r = nfc_set_remote_general_bytes(hdev->ndev, atr_res->gbi, 186 gb_len); 187 if (r < 0) 188 return r; 189 } 190 191 info->dep_info.curr_nfc_dep_pni = 0; 192 193 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 194 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); 195 kfree_skb(skb); 196 return r; 197} 198 199static int st21nfca_tm_recv_atr_req(struct nfc_hci_dev *hdev, 200 struct sk_buff *skb) 201{ 202 struct st21nfca_atr_req *atr_req; 203 size_t gb_len; 204 int r; 205 206 skb_trim(skb, skb->len - 1); 207 208 if (!skb->len) { 209 r = -EIO; 210 goto exit; 211 } 212 213 if (skb->len < ST21NFCA_ATR_REQ_MIN_SIZE) { 214 r = -EPROTO; 215 goto exit; 216 } 217 218 atr_req = (struct st21nfca_atr_req *)skb->data; 219 220 if (atr_req->length < sizeof(struct st21nfca_atr_req)) { 221 r = -EPROTO; 222 goto exit; 223 } 224 225 r = st21nfca_tm_send_atr_res(hdev, atr_req); 226 if (r) 227 goto exit; 228 229 gb_len = skb->len - sizeof(struct st21nfca_atr_req); 230 231 r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK, 232 NFC_COMM_PASSIVE, atr_req->gbi, gb_len); 233 if (r) 234 goto exit; 235 236 r = 0; 237 238exit: 239 return r; 240} 241 242static int st21nfca_tm_send_psl_res(struct nfc_hci_dev *hdev, 243 struct st21nfca_psl_req *psl_req) 244{ 245 struct st21nfca_psl_res *psl_res; 246 struct sk_buff *skb; 247 u8 bitrate[2] = {0, 0}; 248 int r; 249 250 skb = alloc_skb(sizeof(struct st21nfca_psl_res), GFP_KERNEL); 251 if (!skb) 252 return -ENOMEM; 253 skb_put(skb, sizeof(struct st21nfca_psl_res)); 254 255 psl_res = (struct st21nfca_psl_res *)skb->data; 256 257 psl_res->length = sizeof(struct st21nfca_psl_res); 258 psl_res->cmd0 = ST21NFCA_NFCIP1_RES; 259 psl_res->cmd1 = ST21NFCA_NFCIP1_PSL_RES; 260 psl_res->did = psl_req->did; 261 262 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 263 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); 264 if (r < 0) 265 goto error; 266 267 /* 268 * ST21NFCA only support P2P passive. 269 * PSL_REQ BRS value != 0 has only a meaning to 270 * change technology to type F. 271 * We change to BITRATE 424Kbits. 272 * In other case switch to BITRATE 106Kbits. 273 */ 274 if (ST21NFCA_PSL_REQ_SEND_SPEED(psl_req->brs) && 275 ST21NFCA_PSL_REQ_RECV_SPEED(psl_req->brs)) { 276 bitrate[0] = ST21NFCA_CARD_BITRATE_424; 277 bitrate[1] = ST21NFCA_CARD_BITRATE_424; 278 } 279 280 /* Send an event to change bitrate change event to card f */ 281 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 282 ST21NFCA_EVT_CARD_F_BITRATE, bitrate, 2); 283error: 284 kfree_skb(skb); 285 return r; 286} 287 288static int st21nfca_tm_recv_psl_req(struct nfc_hci_dev *hdev, 289 struct sk_buff *skb) 290{ 291 struct st21nfca_psl_req *psl_req; 292 int r; 293 294 skb_trim(skb, skb->len - 1); 295 296 if (!skb->len) { 297 r = -EIO; 298 goto exit; 299 } 300 301 psl_req = (struct st21nfca_psl_req *)skb->data; 302 303 if (skb->len < sizeof(struct st21nfca_psl_req)) { 304 r = -EIO; 305 goto exit; 306 } 307 308 r = st21nfca_tm_send_psl_res(hdev, psl_req); 309exit: 310 return r; 311} 312 313int st21nfca_tm_send_dep_res(struct nfc_hci_dev *hdev, struct sk_buff *skb) 314{ 315 int r; 316 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 317 318 *skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; 319 *skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_RES; 320 *skb_push(skb, 1) = ST21NFCA_NFCIP1_RES; 321 *skb_push(skb, 1) = skb->len; 322 323 r = nfc_hci_send_event(hdev, ST21NFCA_RF_CARD_F_GATE, 324 ST21NFCA_EVT_SEND_DATA, skb->data, skb->len); 325 kfree_skb(skb); 326 327 return r; 328} 329EXPORT_SYMBOL(st21nfca_tm_send_dep_res); 330 331static int st21nfca_tm_recv_dep_req(struct nfc_hci_dev *hdev, 332 struct sk_buff *skb) 333{ 334 struct st21nfca_dep_req_res *dep_req; 335 u8 size; 336 int r; 337 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 338 339 skb_trim(skb, skb->len - 1); 340 341 size = 4; 342 343 dep_req = (struct st21nfca_dep_req_res *)skb->data; 344 if (skb->len < size) { 345 r = -EIO; 346 goto exit; 347 } 348 349 if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_req->pfb)) 350 size++; 351 if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_req->pfb)) 352 size++; 353 354 if (skb->len < size) { 355 r = -EIO; 356 goto exit; 357 } 358 359 /* Receiving DEP_REQ - Decoding */ 360 switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_req->pfb)) { 361 case ST21NFCA_NFC_DEP_PFB_I_PDU: 362 info->dep_info.curr_nfc_dep_pni = 363 ST21NFCA_NFC_DEP_PFB_PNI(dep_req->pfb); 364 break; 365 case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: 366 pr_err("Received a ACK/NACK PDU\n"); 367 break; 368 case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: 369 pr_err("Received a SUPERVISOR PDU\n"); 370 break; 371 } 372 373 skb_pull(skb, size); 374 375 return nfc_tm_data_received(hdev->ndev, skb); 376exit: 377 return r; 378} 379 380static int st21nfca_tm_event_send_data(struct nfc_hci_dev *hdev, 381 struct sk_buff *skb) 382{ 383 u8 cmd0, cmd1; 384 int r; 385 386 cmd0 = skb->data[1]; 387 switch (cmd0) { 388 case ST21NFCA_NFCIP1_REQ: 389 cmd1 = skb->data[2]; 390 switch (cmd1) { 391 case ST21NFCA_NFCIP1_ATR_REQ: 392 r = st21nfca_tm_recv_atr_req(hdev, skb); 393 break; 394 case ST21NFCA_NFCIP1_PSL_REQ: 395 r = st21nfca_tm_recv_psl_req(hdev, skb); 396 break; 397 case ST21NFCA_NFCIP1_DEP_REQ: 398 r = st21nfca_tm_recv_dep_req(hdev, skb); 399 break; 400 default: 401 return 1; 402 } 403 default: 404 return 1; 405 } 406 return r; 407} 408 409/* 410 * Returns: 411 * <= 0: driver handled the event, skb consumed 412 * 1: driver does not handle the event, please do standard processing 413 */ 414int st21nfca_dep_event_received(struct nfc_hci_dev *hdev, 415 u8 event, struct sk_buff *skb) 416{ 417 int r = 0; 418 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 419 420 pr_debug("dep event: %d\n", event); 421 422 switch (event) { 423 case ST21NFCA_EVT_CARD_ACTIVATED: 424 info->dep_info.curr_nfc_dep_pni = 0; 425 break; 426 case ST21NFCA_EVT_CARD_DEACTIVATED: 427 break; 428 case ST21NFCA_EVT_FIELD_ON: 429 break; 430 case ST21NFCA_EVT_FIELD_OFF: 431 break; 432 case ST21NFCA_EVT_SEND_DATA: 433 r = st21nfca_tm_event_send_data(hdev, skb); 434 if (r < 0) 435 return r; 436 return 0; 437 default: 438 nfc_err(&hdev->ndev->dev, "Unexpected event on card f gate\n"); 439 return 1; 440 } 441 kfree_skb(skb); 442 return r; 443} 444EXPORT_SYMBOL(st21nfca_dep_event_received); 445 446static void st21nfca_im_send_psl_req(struct nfc_hci_dev *hdev, u8 did, u8 bsi, 447 u8 bri, u8 lri) 448{ 449 struct sk_buff *skb; 450 struct st21nfca_psl_req *psl_req; 451 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 452 453 skb = 454 alloc_skb(sizeof(struct st21nfca_psl_req) + 1, GFP_KERNEL); 455 if (!skb) 456 return; 457 skb_reserve(skb, 1); 458 459 skb_put(skb, sizeof(struct st21nfca_psl_req)); 460 psl_req = (struct st21nfca_psl_req *) skb->data; 461 462 psl_req->length = sizeof(struct st21nfca_psl_req); 463 psl_req->cmd0 = ST21NFCA_NFCIP1_REQ; 464 psl_req->cmd1 = ST21NFCA_NFCIP1_PSL_REQ; 465 psl_req->did = did; 466 psl_req->brs = (0x30 & bsi << 4) | (bri & 0x03); 467 psl_req->fsl = lri; 468 469 *skb_push(skb, 1) = info->dep_info.to | 0x10; 470 471 st21nfca_im_send_pdu(info, skb); 472} 473 474#define ST21NFCA_CB_TYPE_READER_F 1 475static void st21nfca_im_recv_atr_res_cb(void *context, struct sk_buff *skb, 476 int err) 477{ 478 struct st21nfca_hci_info *info = context; 479 struct st21nfca_atr_res *atr_res; 480 int r; 481 482 if (err != 0) 483 return; 484 485 if (!skb) 486 return; 487 488 switch (info->async_cb_type) { 489 case ST21NFCA_CB_TYPE_READER_F: 490 skb_trim(skb, skb->len - 1); 491 atr_res = (struct st21nfca_atr_res *)skb->data; 492 r = nfc_set_remote_general_bytes(info->hdev->ndev, 493 atr_res->gbi, 494 skb->len - sizeof(struct st21nfca_atr_res)); 495 if (r < 0) 496 return; 497 498 if (atr_res->to >= 0x0e) 499 info->dep_info.to = 0x0e; 500 else 501 info->dep_info.to = atr_res->to + 1; 502 503 info->dep_info.to |= 0x10; 504 505 r = nfc_dep_link_is_up(info->hdev->ndev, info->dep_info.idx, 506 NFC_COMM_PASSIVE, NFC_RF_INITIATOR); 507 if (r < 0) 508 return; 509 510 info->dep_info.curr_nfc_dep_pni = 0; 511 if (ST21NFCA_PP2LRI(atr_res->ppi) != info->dep_info.lri) 512 st21nfca_im_send_psl_req(info->hdev, atr_res->did, 513 atr_res->bsi, atr_res->bri, 514 ST21NFCA_PP2LRI(atr_res->ppi)); 515 break; 516 default: 517 kfree_skb(skb); 518 break; 519 } 520} 521 522int st21nfca_im_send_atr_req(struct nfc_hci_dev *hdev, u8 *gb, size_t gb_len) 523{ 524 struct sk_buff *skb; 525 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 526 struct st21nfca_atr_req *atr_req; 527 struct nfc_target *target; 528 uint size; 529 530 info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; 531 size = ST21NFCA_ATR_REQ_MIN_SIZE + gb_len; 532 if (size > ST21NFCA_ATR_REQ_MAX_SIZE) { 533 PROTOCOL_ERR("14.6.1.1"); 534 return -EINVAL; 535 } 536 537 skb = 538 alloc_skb(sizeof(struct st21nfca_atr_req) + gb_len + 1, GFP_KERNEL); 539 if (!skb) 540 return -ENOMEM; 541 542 skb_reserve(skb, 1); 543 544 skb_put(skb, sizeof(struct st21nfca_atr_req)); 545 546 atr_req = (struct st21nfca_atr_req *)skb->data; 547 memset(atr_req, 0, sizeof(struct st21nfca_atr_req)); 548 549 atr_req->cmd0 = ST21NFCA_NFCIP1_REQ; 550 atr_req->cmd1 = ST21NFCA_NFCIP1_ATR_REQ; 551 memset(atr_req->nfcid3, 0, NFC_NFCID3_MAXSIZE); 552 target = hdev->ndev->targets; 553 554 if (target->sensf_res_len > 0) 555 memcpy(atr_req->nfcid3, target->sensf_res, 556 target->sensf_res_len); 557 else 558 get_random_bytes(atr_req->nfcid3, NFC_NFCID3_MAXSIZE); 559 560 atr_req->did = 0x0; 561 562 atr_req->bsi = 0x00; 563 atr_req->bri = 0x00; 564 atr_req->ppi = ST21NFCA_LR_BITS_PAYLOAD_SIZE_254B; 565 if (gb_len) { 566 atr_req->ppi |= ST21NFCA_GB_BIT; 567 memcpy(skb_put(skb, gb_len), gb, gb_len); 568 } 569 atr_req->length = sizeof(struct st21nfca_atr_req) + hdev->gb_len; 570 571 *skb_push(skb, 1) = info->dep_info.to | 0x10; /* timeout */ 572 573 info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; 574 info->async_cb_context = info; 575 info->async_cb = st21nfca_im_recv_atr_res_cb; 576 info->dep_info.bri = atr_req->bri; 577 info->dep_info.bsi = atr_req->bsi; 578 info->dep_info.lri = ST21NFCA_PP2LRI(atr_req->ppi); 579 580 return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, 581 ST21NFCA_WR_XCHG_DATA, skb->data, 582 skb->len, info->async_cb, info); 583} 584EXPORT_SYMBOL(st21nfca_im_send_atr_req); 585 586static void st21nfca_im_recv_dep_res_cb(void *context, struct sk_buff *skb, 587 int err) 588{ 589 struct st21nfca_hci_info *info = context; 590 struct st21nfca_dep_req_res *dep_res; 591 592 int size; 593 594 if (err != 0) 595 return; 596 597 if (!skb) 598 return; 599 600 switch (info->async_cb_type) { 601 case ST21NFCA_CB_TYPE_READER_F: 602 dep_res = (struct st21nfca_dep_req_res *)skb->data; 603 604 size = 3; 605 if (skb->len < size) 606 goto exit; 607 608 if (ST21NFCA_NFC_DEP_DID_BIT_SET(dep_res->pfb)) 609 size++; 610 if (ST21NFCA_NFC_DEP_NAD_BIT_SET(dep_res->pfb)) 611 size++; 612 613 if (skb->len < size) 614 goto exit; 615 616 skb_trim(skb, skb->len - 1); 617 618 /* Receiving DEP_REQ - Decoding */ 619 switch (ST21NFCA_NFC_DEP_PFB_TYPE(dep_res->pfb)) { 620 case ST21NFCA_NFC_DEP_PFB_ACK_NACK_PDU: 621 pr_err("Received a ACK/NACK PDU\n"); 622 case ST21NFCA_NFC_DEP_PFB_I_PDU: 623 info->dep_info.curr_nfc_dep_pni = 624 ST21NFCA_NFC_DEP_PFB_PNI(dep_res->pfb + 1); 625 size++; 626 skb_pull(skb, size); 627 nfc_tm_data_received(info->hdev->ndev, skb); 628 break; 629 case ST21NFCA_NFC_DEP_PFB_SUPERVISOR_PDU: 630 pr_err("Received a SUPERVISOR PDU\n"); 631 skb_pull(skb, size); 632 *skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; 633 *skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; 634 *skb_push(skb, 1) = skb->len; 635 *skb_push(skb, 1) = info->dep_info.to | 0x10; 636 637 st21nfca_im_send_pdu(info, skb); 638 break; 639 } 640 641 return; 642 default: 643 break; 644 } 645 646exit: 647 kfree_skb(skb); 648} 649 650int st21nfca_im_send_dep_req(struct nfc_hci_dev *hdev, struct sk_buff *skb) 651{ 652 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 653 654 info->async_cb_type = ST21NFCA_CB_TYPE_READER_F; 655 info->async_cb_context = info; 656 info->async_cb = st21nfca_im_recv_dep_res_cb; 657 658 *skb_push(skb, 1) = info->dep_info.curr_nfc_dep_pni; 659 *skb_push(skb, 1) = ST21NFCA_NFCIP1_DEP_REQ; 660 *skb_push(skb, 1) = ST21NFCA_NFCIP1_REQ; 661 *skb_push(skb, 1) = skb->len; 662 663 *skb_push(skb, 1) = info->dep_info.to | 0x10; 664 665 return nfc_hci_send_cmd_async(hdev, ST21NFCA_RF_READER_F_GATE, 666 ST21NFCA_WR_XCHG_DATA, 667 skb->data, skb->len, 668 info->async_cb, info); 669} 670EXPORT_SYMBOL(st21nfca_im_send_dep_req); 671 672void st21nfca_dep_init(struct nfc_hci_dev *hdev) 673{ 674 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 675 676 INIT_WORK(&info->dep_info.tx_work, st21nfca_tx_work); 677 info->dep_info.curr_nfc_dep_pni = 0; 678 info->dep_info.idx = 0; 679 info->dep_info.to = ST21NFCA_DEFAULT_TIMEOUT; 680} 681EXPORT_SYMBOL(st21nfca_dep_init); 682 683void st21nfca_dep_deinit(struct nfc_hci_dev *hdev) 684{ 685 struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev); 686 687 cancel_work_sync(&info->dep_info.tx_work); 688} 689EXPORT_SYMBOL(st21nfca_dep_deinit); 690