pn544.c revision 27c31191b3d7ff32c266a5dbea344b9aa96ebf14
1/* 2 * HCI based Driver for NXP PN544 NFC Chip 3 * 4 * Copyright (C) 2012 Intel Corporation. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms and conditions of the GNU General Public License, 8 * version 2, as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the 17 * Free Software Foundation, Inc., 18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 19 */ 20 21#include <linux/delay.h> 22#include <linux/slab.h> 23 24#include <linux/nfc.h> 25#include <net/nfc/hci.h> 26#include <net/nfc/llc.h> 27 28#include "pn544.h" 29 30/* Timing restrictions (ms) */ 31#define PN544_HCI_RESETVEN_TIME 30 32 33#define HCI_MODE 0 34#define FW_MODE 1 35 36enum pn544_state { 37 PN544_ST_COLD, 38 PN544_ST_FW_READY, 39 PN544_ST_READY, 40}; 41 42#define FULL_VERSION_LEN 11 43 44/* Proprietary commands */ 45#define PN544_WRITE 0x3f 46 47/* Proprietary gates, events, commands and registers */ 48 49/* NFC_HCI_RF_READER_A_GATE additional registers and commands */ 50#define PN544_RF_READER_A_AUTO_ACTIVATION 0x10 51#define PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION 0x12 52#define PN544_MIFARE_CMD 0x21 53 54/* Commands that apply to all RF readers */ 55#define PN544_RF_READER_CMD_PRESENCE_CHECK 0x30 56#define PN544_RF_READER_CMD_ACTIVATE_NEXT 0x32 57 58/* NFC_HCI_ID_MGMT_GATE additional registers */ 59#define PN544_ID_MGMT_FULL_VERSION_SW 0x10 60 61#define PN544_RF_READER_ISO15693_GATE 0x12 62 63#define PN544_RF_READER_F_GATE 0x14 64#define PN544_FELICA_ID 0x04 65#define PN544_FELICA_RAW 0x20 66 67#define PN544_RF_READER_JEWEL_GATE 0x15 68#define PN544_JEWEL_RAW_CMD 0x23 69 70#define PN544_RF_READER_NFCIP1_INITIATOR_GATE 0x30 71#define PN544_RF_READER_NFCIP1_TARGET_GATE 0x31 72 73#define PN544_SYS_MGMT_GATE 0x90 74#define PN544_SYS_MGMT_INFO_NOTIFICATION 0x02 75 76#define PN544_POLLING_LOOP_MGMT_GATE 0x94 77#define PN544_DEP_MODE 0x01 78#define PN544_DEP_ATR_REQ 0x02 79#define PN544_DEP_ATR_RES 0x03 80#define PN544_DEP_MERGE 0x0D 81#define PN544_PL_RDPHASES 0x06 82#define PN544_PL_EMULATION 0x07 83#define PN544_PL_NFCT_DEACTIVATED 0x09 84 85#define PN544_SWP_MGMT_GATE 0xA0 86 87#define PN544_NFC_WI_MGMT_GATE 0xA1 88 89#define PN544_HCI_EVT_SND_DATA 0x01 90#define PN544_HCI_EVT_ACTIVATED 0x02 91#define PN544_HCI_EVT_DEACTIVATED 0x03 92#define PN544_HCI_EVT_RCV_DATA 0x04 93#define PN544_HCI_EVT_CONTINUE_MI 0x05 94 95#define PN544_HCI_CMD_ATTREQUEST 0x12 96#define PN544_HCI_CMD_CONTINUE_ACTIVATION 0x13 97 98static struct nfc_hci_gate pn544_gates[] = { 99 {NFC_HCI_ADMIN_GATE, NFC_HCI_INVALID_PIPE}, 100 {NFC_HCI_LOOPBACK_GATE, NFC_HCI_INVALID_PIPE}, 101 {NFC_HCI_ID_MGMT_GATE, NFC_HCI_INVALID_PIPE}, 102 {NFC_HCI_LINK_MGMT_GATE, NFC_HCI_INVALID_PIPE}, 103 {NFC_HCI_RF_READER_B_GATE, NFC_HCI_INVALID_PIPE}, 104 {NFC_HCI_RF_READER_A_GATE, NFC_HCI_INVALID_PIPE}, 105 {PN544_SYS_MGMT_GATE, NFC_HCI_INVALID_PIPE}, 106 {PN544_SWP_MGMT_GATE, NFC_HCI_INVALID_PIPE}, 107 {PN544_POLLING_LOOP_MGMT_GATE, NFC_HCI_INVALID_PIPE}, 108 {PN544_NFC_WI_MGMT_GATE, NFC_HCI_INVALID_PIPE}, 109 {PN544_RF_READER_F_GATE, NFC_HCI_INVALID_PIPE}, 110 {PN544_RF_READER_JEWEL_GATE, NFC_HCI_INVALID_PIPE}, 111 {PN544_RF_READER_ISO15693_GATE, NFC_HCI_INVALID_PIPE}, 112 {PN544_RF_READER_NFCIP1_INITIATOR_GATE, NFC_HCI_INVALID_PIPE}, 113 {PN544_RF_READER_NFCIP1_TARGET_GATE, NFC_HCI_INVALID_PIPE} 114}; 115 116/* Largest headroom needed for outgoing custom commands */ 117#define PN544_CMDS_HEADROOM 2 118 119struct pn544_hci_info { 120 struct nfc_phy_ops *phy_ops; 121 void *phy_id; 122 123 struct nfc_hci_dev *hdev; 124 125 enum pn544_state state; 126 127 struct mutex info_lock; 128 129 int async_cb_type; 130 data_exchange_cb_t async_cb; 131 void *async_cb_context; 132}; 133 134static int pn544_hci_open(struct nfc_hci_dev *hdev) 135{ 136 struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); 137 int r = 0; 138 139 mutex_lock(&info->info_lock); 140 141 if (info->state != PN544_ST_COLD) { 142 r = -EBUSY; 143 goto out; 144 } 145 146 r = info->phy_ops->enable(info->phy_id); 147 148 if (r == 0) 149 info->state = PN544_ST_READY; 150 151out: 152 mutex_unlock(&info->info_lock); 153 return r; 154} 155 156static void pn544_hci_close(struct nfc_hci_dev *hdev) 157{ 158 struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); 159 160 mutex_lock(&info->info_lock); 161 162 if (info->state == PN544_ST_COLD) 163 goto out; 164 165 info->phy_ops->disable(info->phy_id); 166 167 info->state = PN544_ST_COLD; 168 169out: 170 mutex_unlock(&info->info_lock); 171} 172 173static int pn544_hci_ready(struct nfc_hci_dev *hdev) 174{ 175 struct sk_buff *skb; 176 static struct hw_config { 177 u8 adr[2]; 178 u8 value; 179 } hw_config[] = { 180 {{0x9f, 0x9a}, 0x00}, 181 182 {{0x98, 0x10}, 0xbc}, 183 184 {{0x9e, 0x71}, 0x00}, 185 186 {{0x98, 0x09}, 0x00}, 187 188 {{0x9e, 0xb4}, 0x00}, 189 190 {{0x9e, 0xd9}, 0xff}, 191 {{0x9e, 0xda}, 0xff}, 192 {{0x9e, 0xdb}, 0x23}, 193 {{0x9e, 0xdc}, 0x21}, 194 {{0x9e, 0xdd}, 0x22}, 195 {{0x9e, 0xde}, 0x24}, 196 197 {{0x9c, 0x01}, 0x08}, 198 199 {{0x9e, 0xaa}, 0x01}, 200 201 {{0x9b, 0xd1}, 0x0d}, 202 {{0x9b, 0xd2}, 0x24}, 203 {{0x9b, 0xd3}, 0x0a}, 204 {{0x9b, 0xd4}, 0x22}, 205 {{0x9b, 0xd5}, 0x08}, 206 {{0x9b, 0xd6}, 0x1e}, 207 {{0x9b, 0xdd}, 0x1c}, 208 209 {{0x9b, 0x84}, 0x13}, 210 {{0x99, 0x81}, 0x7f}, 211 {{0x99, 0x31}, 0x70}, 212 213 {{0x98, 0x00}, 0x3f}, 214 215 {{0x9f, 0x09}, 0x00}, 216 217 {{0x9f, 0x0a}, 0x05}, 218 219 {{0x9e, 0xd1}, 0xa1}, 220 {{0x99, 0x23}, 0x00}, 221 222 {{0x9e, 0x74}, 0x80}, 223 224 {{0x9f, 0x28}, 0x10}, 225 226 {{0x9f, 0x35}, 0x14}, 227 228 {{0x9f, 0x36}, 0x60}, 229 230 {{0x9c, 0x31}, 0x00}, 231 232 {{0x9c, 0x32}, 0xc8}, 233 234 {{0x9c, 0x19}, 0x40}, 235 236 {{0x9c, 0x1a}, 0x40}, 237 238 {{0x9c, 0x0c}, 0x00}, 239 240 {{0x9c, 0x0d}, 0x00}, 241 242 {{0x9c, 0x12}, 0x00}, 243 244 {{0x9c, 0x13}, 0x00}, 245 246 {{0x98, 0xa2}, 0x0e}, 247 248 {{0x98, 0x93}, 0x40}, 249 250 {{0x98, 0x7d}, 0x02}, 251 {{0x98, 0x7e}, 0x00}, 252 {{0x9f, 0xc8}, 0x01}, 253 }; 254 struct hw_config *p = hw_config; 255 int count = ARRAY_SIZE(hw_config); 256 struct sk_buff *res_skb; 257 u8 param[4]; 258 int r; 259 260 param[0] = 0; 261 while (count--) { 262 param[1] = p->adr[0]; 263 param[2] = p->adr[1]; 264 param[3] = p->value; 265 266 r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE, PN544_WRITE, 267 param, 4, &res_skb); 268 if (r < 0) 269 return r; 270 271 if (res_skb->len != 1) { 272 kfree_skb(res_skb); 273 return -EPROTO; 274 } 275 276 if (res_skb->data[0] != p->value) { 277 kfree_skb(res_skb); 278 return -EIO; 279 } 280 281 kfree_skb(res_skb); 282 283 p++; 284 } 285 286 param[0] = NFC_HCI_UICC_HOST_ID; 287 r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE, 288 NFC_HCI_ADMIN_WHITELIST, param, 1); 289 if (r < 0) 290 return r; 291 292 param[0] = 0x3d; 293 r = nfc_hci_set_param(hdev, PN544_SYS_MGMT_GATE, 294 PN544_SYS_MGMT_INFO_NOTIFICATION, param, 1); 295 if (r < 0) 296 return r; 297 298 param[0] = 0x0; 299 r = nfc_hci_set_param(hdev, NFC_HCI_RF_READER_A_GATE, 300 PN544_RF_READER_A_AUTO_ACTIVATION, param, 1); 301 if (r < 0) 302 return r; 303 304 r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, 305 NFC_HCI_EVT_END_OPERATION, NULL, 0); 306 if (r < 0) 307 return r; 308 309 param[0] = 0x1; 310 r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, 311 PN544_PL_NFCT_DEACTIVATED, param, 1); 312 if (r < 0) 313 return r; 314 315 param[0] = 0x0; 316 r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, 317 PN544_PL_RDPHASES, param, 1); 318 if (r < 0) 319 return r; 320 321 r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE, 322 PN544_ID_MGMT_FULL_VERSION_SW, &skb); 323 if (r < 0) 324 return r; 325 326 if (skb->len != FULL_VERSION_LEN) { 327 kfree_skb(skb); 328 return -EINVAL; 329 } 330 331 print_hex_dump(KERN_DEBUG, "FULL VERSION SOFTWARE INFO: ", 332 DUMP_PREFIX_NONE, 16, 1, 333 skb->data, FULL_VERSION_LEN, false); 334 335 kfree_skb(skb); 336 337 return 0; 338} 339 340static int pn544_hci_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb) 341{ 342 struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); 343 344 return info->phy_ops->write(info->phy_id, skb); 345} 346 347static int pn544_hci_start_poll(struct nfc_hci_dev *hdev, 348 u32 im_protocols, u32 tm_protocols) 349{ 350 u8 phases = 0; 351 int r; 352 u8 duration[2]; 353 u8 activated; 354 u8 i_mode = 0x3f; /* Enable all supported modes */ 355 u8 t_mode = 0x0f; 356 u8 t_merge = 0x01; /* Enable merge by default */ 357 358 pr_info(DRIVER_DESC ": %s protocols 0x%x 0x%x\n", 359 __func__, im_protocols, tm_protocols); 360 361 r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, 362 NFC_HCI_EVT_END_OPERATION, NULL, 0); 363 if (r < 0) 364 return r; 365 366 duration[0] = 0x18; 367 duration[1] = 0x6a; 368 r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, 369 PN544_PL_EMULATION, duration, 2); 370 if (r < 0) 371 return r; 372 373 activated = 0; 374 r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, 375 PN544_PL_NFCT_DEACTIVATED, &activated, 1); 376 if (r < 0) 377 return r; 378 379 if (im_protocols & (NFC_PROTO_ISO14443_MASK | NFC_PROTO_MIFARE_MASK | 380 NFC_PROTO_JEWEL_MASK)) 381 phases |= 1; /* Type A */ 382 if (im_protocols & NFC_PROTO_FELICA_MASK) { 383 phases |= (1 << 2); /* Type F 212 */ 384 phases |= (1 << 3); /* Type F 424 */ 385 } 386 387 phases |= (1 << 5); /* NFC active */ 388 389 r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, 390 PN544_PL_RDPHASES, &phases, 1); 391 if (r < 0) 392 return r; 393 394 if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) { 395 hdev->gb = nfc_get_local_general_bytes(hdev->ndev, 396 &hdev->gb_len); 397 pr_debug("generate local bytes %p", hdev->gb); 398 if (hdev->gb == NULL || hdev->gb_len == 0) { 399 im_protocols &= ~NFC_PROTO_NFC_DEP_MASK; 400 tm_protocols &= ~NFC_PROTO_NFC_DEP_MASK; 401 } 402 } 403 404 if (im_protocols & NFC_PROTO_NFC_DEP_MASK) { 405 r = nfc_hci_send_event(hdev, 406 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 407 NFC_HCI_EVT_END_OPERATION, NULL, 0); 408 if (r < 0) 409 return r; 410 411 r = nfc_hci_set_param(hdev, 412 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 413 PN544_DEP_MODE, &i_mode, 1); 414 if (r < 0) 415 return r; 416 417 r = nfc_hci_set_param(hdev, 418 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 419 PN544_DEP_ATR_REQ, hdev->gb, hdev->gb_len); 420 if (r < 0) 421 return r; 422 423 r = nfc_hci_send_event(hdev, 424 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 425 NFC_HCI_EVT_READER_REQUESTED, NULL, 0); 426 if (r < 0) 427 nfc_hci_send_event(hdev, 428 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 429 NFC_HCI_EVT_END_OPERATION, NULL, 0); 430 } 431 432 if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) { 433 r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, 434 PN544_DEP_MODE, &t_mode, 1); 435 if (r < 0) 436 return r; 437 438 r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, 439 PN544_DEP_ATR_RES, hdev->gb, hdev->gb_len); 440 if (r < 0) 441 return r; 442 443 r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, 444 PN544_DEP_MERGE, &t_merge, 1); 445 if (r < 0) 446 return r; 447 } 448 449 r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, 450 NFC_HCI_EVT_READER_REQUESTED, NULL, 0); 451 if (r < 0) 452 nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, 453 NFC_HCI_EVT_END_OPERATION, NULL, 0); 454 455 return r; 456} 457 458static int pn544_hci_dep_link_up(struct nfc_hci_dev *hdev, 459 struct nfc_target *target, u8 comm_mode, 460 u8 *gb, size_t gb_len) 461{ 462 struct sk_buff *rgb_skb = NULL; 463 int r; 464 465 r = nfc_hci_get_param(hdev, target->hci_reader_gate, 466 PN544_DEP_ATR_RES, &rgb_skb); 467 if (r < 0) 468 return r; 469 470 if (rgb_skb->len == 0 || rgb_skb->len > NFC_GB_MAXSIZE) { 471 r = -EPROTO; 472 goto exit; 473 } 474 print_hex_dump(KERN_DEBUG, "remote gb: ", DUMP_PREFIX_OFFSET, 475 16, 1, rgb_skb->data, rgb_skb->len, true); 476 477 r = nfc_set_remote_general_bytes(hdev->ndev, rgb_skb->data, 478 rgb_skb->len); 479 480 if (r == 0) 481 r = nfc_dep_link_is_up(hdev->ndev, target->idx, comm_mode, 482 NFC_RF_INITIATOR); 483exit: 484 kfree_skb(rgb_skb); 485 return r; 486} 487 488static int pn544_hci_dep_link_down(struct nfc_hci_dev *hdev) 489{ 490 491 return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE, 492 NFC_HCI_EVT_END_OPERATION, NULL, 0); 493} 494 495static int pn544_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate, 496 struct nfc_target *target) 497{ 498 switch (gate) { 499 case PN544_RF_READER_F_GATE: 500 target->supported_protocols = NFC_PROTO_FELICA_MASK; 501 break; 502 case PN544_RF_READER_JEWEL_GATE: 503 target->supported_protocols = NFC_PROTO_JEWEL_MASK; 504 target->sens_res = 0x0c00; 505 break; 506 case PN544_RF_READER_NFCIP1_INITIATOR_GATE: 507 target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; 508 break; 509 default: 510 return -EPROTO; 511 } 512 513 return 0; 514} 515 516static int pn544_hci_complete_target_discovered(struct nfc_hci_dev *hdev, 517 u8 gate, 518 struct nfc_target *target) 519{ 520 struct sk_buff *uid_skb; 521 int r = 0; 522 523 if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE) 524 return r; 525 526 if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) { 527 r = nfc_hci_send_cmd(hdev, 528 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 529 PN544_HCI_CMD_CONTINUE_ACTIVATION, NULL, 0, NULL); 530 if (r < 0) 531 return r; 532 533 target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE; 534 } else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) { 535 if (target->nfcid1_len != 4 && target->nfcid1_len != 7 && 536 target->nfcid1_len != 10) 537 return -EPROTO; 538 539 r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE, 540 PN544_RF_READER_CMD_ACTIVATE_NEXT, 541 target->nfcid1, target->nfcid1_len, NULL); 542 } else if (target->supported_protocols & NFC_PROTO_FELICA_MASK) { 543 r = nfc_hci_get_param(hdev, PN544_RF_READER_F_GATE, 544 PN544_FELICA_ID, &uid_skb); 545 if (r < 0) 546 return r; 547 548 if (uid_skb->len != 8) { 549 kfree_skb(uid_skb); 550 return -EPROTO; 551 } 552 553 r = nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE, 554 PN544_RF_READER_CMD_ACTIVATE_NEXT, 555 uid_skb->data, uid_skb->len, NULL); 556 kfree_skb(uid_skb); 557 558 r = nfc_hci_send_cmd(hdev, 559 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 560 PN544_HCI_CMD_CONTINUE_ACTIVATION, 561 NULL, 0, NULL); 562 if (r < 0) 563 return r; 564 565 target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE; 566 target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; 567 } else if (target->supported_protocols & NFC_PROTO_ISO14443_MASK) { 568 /* 569 * TODO: maybe other ISO 14443 require some kind of continue 570 * activation, but for now we've seen only this one below. 571 */ 572 if (target->sens_res == 0x4403) /* Type 4 Mifare DESFire */ 573 r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE, 574 PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION, 575 NULL, 0, NULL); 576 } 577 578 return r; 579} 580 581#define PN544_CB_TYPE_READER_F 1 582 583static void pn544_hci_data_exchange_cb(void *context, struct sk_buff *skb, 584 int err) 585{ 586 struct pn544_hci_info *info = context; 587 588 switch (info->async_cb_type) { 589 case PN544_CB_TYPE_READER_F: 590 if (err == 0) 591 skb_pull(skb, 1); 592 info->async_cb(info->async_cb_context, skb, err); 593 break; 594 default: 595 if (err == 0) 596 kfree_skb(skb); 597 break; 598 } 599} 600 601#define MIFARE_CMD_AUTH_KEY_A 0x60 602#define MIFARE_CMD_AUTH_KEY_B 0x61 603#define MIFARE_CMD_HEADER 2 604#define MIFARE_UID_LEN 4 605#define MIFARE_KEY_LEN 6 606#define MIFARE_CMD_LEN 12 607/* 608 * Returns: 609 * <= 0: driver handled the data exchange 610 * 1: driver doesn't especially handle, please do standard processing 611 */ 612static int pn544_hci_im_transceive(struct nfc_hci_dev *hdev, 613 struct nfc_target *target, 614 struct sk_buff *skb, data_exchange_cb_t cb, 615 void *cb_context) 616{ 617 struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); 618 619 pr_info(DRIVER_DESC ": %s for gate=%d\n", __func__, 620 target->hci_reader_gate); 621 622 switch (target->hci_reader_gate) { 623 case NFC_HCI_RF_READER_A_GATE: 624 if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) { 625 /* 626 * It seems that pn544 is inverting key and UID for 627 * MIFARE authentication commands. 628 */ 629 if (skb->len == MIFARE_CMD_LEN && 630 (skb->data[0] == MIFARE_CMD_AUTH_KEY_A || 631 skb->data[0] == MIFARE_CMD_AUTH_KEY_B)) { 632 u8 uid[MIFARE_UID_LEN]; 633 u8 *data = skb->data + MIFARE_CMD_HEADER; 634 635 memcpy(uid, data + MIFARE_KEY_LEN, 636 MIFARE_UID_LEN); 637 memmove(data + MIFARE_UID_LEN, data, 638 MIFARE_KEY_LEN); 639 memcpy(data, uid, MIFARE_UID_LEN); 640 } 641 642 return nfc_hci_send_cmd_async(hdev, 643 target->hci_reader_gate, 644 PN544_MIFARE_CMD, 645 skb->data, skb->len, 646 cb, cb_context); 647 } else 648 return 1; 649 case PN544_RF_READER_F_GATE: 650 *skb_push(skb, 1) = 0; 651 *skb_push(skb, 1) = 0; 652 653 info->async_cb_type = PN544_CB_TYPE_READER_F; 654 info->async_cb = cb; 655 info->async_cb_context = cb_context; 656 657 return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, 658 PN544_FELICA_RAW, skb->data, 659 skb->len, 660 pn544_hci_data_exchange_cb, info); 661 case PN544_RF_READER_JEWEL_GATE: 662 return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, 663 PN544_JEWEL_RAW_CMD, skb->data, 664 skb->len, cb, cb_context); 665 case PN544_RF_READER_NFCIP1_INITIATOR_GATE: 666 *skb_push(skb, 1) = 0; 667 668 return nfc_hci_send_event(hdev, target->hci_reader_gate, 669 PN544_HCI_EVT_SND_DATA, skb->data, 670 skb->len); 671 default: 672 return 1; 673 } 674} 675 676static int pn544_hci_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb) 677{ 678 /* Set default false for multiple information chaining */ 679 *skb_push(skb, 1) = 0; 680 681 return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, 682 PN544_HCI_EVT_SND_DATA, skb->data, skb->len); 683} 684 685static int pn544_hci_check_presence(struct nfc_hci_dev *hdev, 686 struct nfc_target *target) 687{ 688 pr_debug("supported protocol %d", target->supported_protocols); 689 if (target->supported_protocols & (NFC_PROTO_ISO14443_MASK | 690 NFC_PROTO_ISO14443_B_MASK)) { 691 return nfc_hci_send_cmd(hdev, target->hci_reader_gate, 692 PN544_RF_READER_CMD_PRESENCE_CHECK, 693 NULL, 0, NULL); 694 } else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) { 695 if (target->nfcid1_len != 4 && target->nfcid1_len != 7 && 696 target->nfcid1_len != 10) 697 return -EOPNOTSUPP; 698 699 return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE, 700 PN544_RF_READER_CMD_ACTIVATE_NEXT, 701 target->nfcid1, target->nfcid1_len, NULL); 702 } else if (target->supported_protocols & NFC_PROTO_JEWEL_MASK) { 703 return nfc_hci_send_cmd(hdev, target->hci_reader_gate, 704 PN544_JEWEL_RAW_CMD, NULL, 0, NULL); 705 } else if (target->supported_protocols & NFC_PROTO_FELICA_MASK) { 706 return nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE, 707 PN544_FELICA_RAW, NULL, 0, NULL); 708 } else if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) { 709 return nfc_hci_send_cmd(hdev, target->hci_reader_gate, 710 PN544_HCI_CMD_ATTREQUEST, 711 NULL, 0, NULL); 712 } 713 714 return 0; 715} 716 717static int pn544_hci_event_received(struct nfc_hci_dev *hdev, u8 gate, u8 event, 718 struct sk_buff *skb) 719{ 720 struct sk_buff *rgb_skb = NULL; 721 int r = 0; 722 723 pr_debug("hci event %d", event); 724 switch (event) { 725 case PN544_HCI_EVT_ACTIVATED: 726 if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE) 727 r = nfc_hci_target_discovered(hdev, gate); 728 else if (gate == PN544_RF_READER_NFCIP1_TARGET_GATE) { 729 r = nfc_hci_get_param(hdev, gate, PN544_DEP_ATR_REQ, 730 &rgb_skb); 731 if (r < 0) 732 goto exit; 733 734 r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK, 735 NFC_COMM_PASSIVE, rgb_skb->data, 736 rgb_skb->len); 737 738 kfree_skb(rgb_skb); 739 } 740 break; 741 case PN544_HCI_EVT_DEACTIVATED: 742 r = nfc_hci_send_event(hdev, gate, NFC_HCI_EVT_END_OPERATION, 743 NULL, 0); 744 break; 745 case PN544_HCI_EVT_RCV_DATA: 746 if (skb->len < 2) { 747 r = -EPROTO; 748 goto exit; 749 } 750 751 if (skb->data[0] != 0) { 752 pr_debug("data0 %d", skb->data[0]); 753 r = -EPROTO; 754 goto exit; 755 } 756 757 skb_pull(skb, 2); 758 return nfc_tm_data_received(hdev->ndev, skb); 759 default: 760 pr_err("Discarded unknown event %x to gate %x\n", event, gate); 761 break; 762 } 763 764exit: 765 kfree_skb(skb); 766 767 return r; 768} 769 770static struct nfc_hci_ops pn544_hci_ops = { 771 .open = pn544_hci_open, 772 .close = pn544_hci_close, 773 .hci_ready = pn544_hci_ready, 774 .xmit = pn544_hci_xmit, 775 .start_poll = pn544_hci_start_poll, 776 .dep_link_up = pn544_hci_dep_link_up, 777 .dep_link_down = pn544_hci_dep_link_down, 778 .target_from_gate = pn544_hci_target_from_gate, 779 .complete_target_discovered = pn544_hci_complete_target_discovered, 780 .im_transceive = pn544_hci_im_transceive, 781 .tm_send = pn544_hci_tm_send, 782 .check_presence = pn544_hci_check_presence, 783 .event_received = pn544_hci_event_received, 784}; 785 786int pn544_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name, 787 int phy_headroom, int phy_tailroom, int phy_payload, 788 struct nfc_hci_dev **hdev) 789{ 790 struct pn544_hci_info *info; 791 u32 protocols; 792 struct nfc_hci_init_data init_data; 793 int r; 794 795 info = kzalloc(sizeof(struct pn544_hci_info), GFP_KERNEL); 796 if (!info) { 797 pr_err("Cannot allocate memory for pn544_hci_info.\n"); 798 r = -ENOMEM; 799 goto err_info_alloc; 800 } 801 802 info->phy_ops = phy_ops; 803 info->phy_id = phy_id; 804 info->state = PN544_ST_COLD; 805 mutex_init(&info->info_lock); 806 807 init_data.gate_count = ARRAY_SIZE(pn544_gates); 808 809 memcpy(init_data.gates, pn544_gates, sizeof(pn544_gates)); 810 811 /* 812 * TODO: Session id must include the driver name + some bus addr 813 * persistent info to discriminate 2 identical chips 814 */ 815 strcpy(init_data.session_id, "ID544HCI"); 816 817 protocols = NFC_PROTO_JEWEL_MASK | 818 NFC_PROTO_MIFARE_MASK | 819 NFC_PROTO_FELICA_MASK | 820 NFC_PROTO_ISO14443_MASK | 821 NFC_PROTO_ISO14443_B_MASK | 822 NFC_PROTO_NFC_DEP_MASK; 823 824 info->hdev = nfc_hci_allocate_device(&pn544_hci_ops, &init_data, 825 protocols, llc_name, 826 phy_headroom + PN544_CMDS_HEADROOM, 827 phy_tailroom, phy_payload); 828 if (!info->hdev) { 829 pr_err("Cannot allocate nfc hdev.\n"); 830 r = -ENOMEM; 831 goto err_alloc_hdev; 832 } 833 834 nfc_hci_set_clientdata(info->hdev, info); 835 836 r = nfc_hci_register_device(info->hdev); 837 if (r) 838 goto err_regdev; 839 840 *hdev = info->hdev; 841 842 return 0; 843 844err_regdev: 845 nfc_hci_free_device(info->hdev); 846 847err_alloc_hdev: 848 kfree(info); 849 850err_info_alloc: 851 return r; 852} 853 854void pn544_hci_remove(struct nfc_hci_dev *hdev) 855{ 856 struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); 857 858 nfc_hci_unregister_device(hdev); 859 nfc_hci_free_device(hdev); 860 kfree(info); 861} 862