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 #include <linux/module.h> 24 25 #include <linux/nfc.h> 26 #include <net/nfc/hci.h> 27 #include <net/nfc/llc.h> 28 29 #include "pn544.h" 30 31 /* Timing restrictions (ms) */ 32 #define PN544_HCI_RESETVEN_TIME 30 33 34 #define HCI_MODE 0 35 #define FW_MODE 1 36 37 enum pn544_state { 38 PN544_ST_COLD, 39 PN544_ST_FW_READY, 40 PN544_ST_READY, 41 }; 42 43 #define FULL_VERSION_LEN 11 44 45 /* Proprietary commands */ 46 #define PN544_WRITE 0x3f 47 48 /* Proprietary gates, events, commands and registers */ 49 50 /* NFC_HCI_RF_READER_A_GATE additional registers and commands */ 51 #define PN544_RF_READER_A_AUTO_ACTIVATION 0x10 52 #define PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION 0x12 53 #define PN544_MIFARE_CMD 0x21 54 55 /* Commands that apply to all RF readers */ 56 #define PN544_RF_READER_CMD_PRESENCE_CHECK 0x30 57 #define PN544_RF_READER_CMD_ACTIVATE_NEXT 0x32 58 59 /* NFC_HCI_ID_MGMT_GATE additional registers */ 60 #define PN544_ID_MGMT_FULL_VERSION_SW 0x10 61 62 #define PN544_RF_READER_ISO15693_GATE 0x12 63 64 #define PN544_RF_READER_F_GATE 0x14 65 #define PN544_FELICA_ID 0x04 66 #define PN544_FELICA_RAW 0x20 67 68 #define PN544_RF_READER_JEWEL_GATE 0x15 69 #define PN544_JEWEL_RAW_CMD 0x23 70 71 #define PN544_RF_READER_NFCIP1_INITIATOR_GATE 0x30 72 #define PN544_RF_READER_NFCIP1_TARGET_GATE 0x31 73 74 #define PN544_SYS_MGMT_GATE 0x90 75 #define PN544_SYS_MGMT_INFO_NOTIFICATION 0x02 76 77 #define PN544_POLLING_LOOP_MGMT_GATE 0x94 78 #define PN544_DEP_MODE 0x01 79 #define PN544_DEP_ATR_REQ 0x02 80 #define PN544_DEP_ATR_RES 0x03 81 #define PN544_DEP_MERGE 0x0D 82 #define PN544_PL_RDPHASES 0x06 83 #define PN544_PL_EMULATION 0x07 84 #define PN544_PL_NFCT_DEACTIVATED 0x09 85 86 #define PN544_SWP_MGMT_GATE 0xA0 87 88 #define PN544_NFC_WI_MGMT_GATE 0xA1 89 90 #define PN544_HCI_EVT_SND_DATA 0x01 91 #define PN544_HCI_EVT_ACTIVATED 0x02 92 #define PN544_HCI_EVT_DEACTIVATED 0x03 93 #define PN544_HCI_EVT_RCV_DATA 0x04 94 #define PN544_HCI_EVT_CONTINUE_MI 0x05 95 96 #define PN544_HCI_CMD_ATTREQUEST 0x12 97 #define PN544_HCI_CMD_CONTINUE_ACTIVATION 0x13 98 99 static struct nfc_hci_gate pn544_gates[] = { 100 {NFC_HCI_ADMIN_GATE, NFC_HCI_INVALID_PIPE}, 101 {NFC_HCI_LOOPBACK_GATE, NFC_HCI_INVALID_PIPE}, 102 {NFC_HCI_ID_MGMT_GATE, NFC_HCI_INVALID_PIPE}, 103 {NFC_HCI_LINK_MGMT_GATE, NFC_HCI_INVALID_PIPE}, 104 {NFC_HCI_RF_READER_B_GATE, NFC_HCI_INVALID_PIPE}, 105 {NFC_HCI_RF_READER_A_GATE, NFC_HCI_INVALID_PIPE}, 106 {PN544_SYS_MGMT_GATE, NFC_HCI_INVALID_PIPE}, 107 {PN544_SWP_MGMT_GATE, NFC_HCI_INVALID_PIPE}, 108 {PN544_POLLING_LOOP_MGMT_GATE, NFC_HCI_INVALID_PIPE}, 109 {PN544_NFC_WI_MGMT_GATE, NFC_HCI_INVALID_PIPE}, 110 {PN544_RF_READER_F_GATE, NFC_HCI_INVALID_PIPE}, 111 {PN544_RF_READER_JEWEL_GATE, NFC_HCI_INVALID_PIPE}, 112 {PN544_RF_READER_ISO15693_GATE, NFC_HCI_INVALID_PIPE}, 113 {PN544_RF_READER_NFCIP1_INITIATOR_GATE, NFC_HCI_INVALID_PIPE}, 114 {PN544_RF_READER_NFCIP1_TARGET_GATE, NFC_HCI_INVALID_PIPE} 115 }; 116 117 /* Largest headroom needed for outgoing custom commands */ 118 #define PN544_CMDS_HEADROOM 2 119 120 struct pn544_hci_info { 121 struct nfc_phy_ops *phy_ops; 122 void *phy_id; 123 124 struct nfc_hci_dev *hdev; 125 126 enum pn544_state state; 127 128 struct mutex info_lock; 129 130 int async_cb_type; 131 data_exchange_cb_t async_cb; 132 void *async_cb_context; 133 }; 134 135 static int pn544_hci_open(struct nfc_hci_dev *hdev) 136 { 137 struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); 138 int r = 0; 139 140 mutex_lock(&info->info_lock); 141 142 if (info->state != PN544_ST_COLD) { 143 r = -EBUSY; 144 goto out; 145 } 146 147 r = info->phy_ops->enable(info->phy_id); 148 149 if (r == 0) 150 info->state = PN544_ST_READY; 151 152 out: 153 mutex_unlock(&info->info_lock); 154 return r; 155 } 156 157 static void pn544_hci_close(struct nfc_hci_dev *hdev) 158 { 159 struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); 160 161 mutex_lock(&info->info_lock); 162 163 if (info->state == PN544_ST_COLD) 164 goto out; 165 166 info->phy_ops->disable(info->phy_id); 167 168 info->state = PN544_ST_COLD; 169 170 out: 171 mutex_unlock(&info->info_lock); 172 } 173 174 static int pn544_hci_ready(struct nfc_hci_dev *hdev) 175 { 176 struct sk_buff *skb; 177 static struct hw_config { 178 u8 adr[2]; 179 u8 value; 180 } hw_config[] = { 181 {{0x9f, 0x9a}, 0x00}, 182 183 {{0x98, 0x10}, 0xbc}, 184 185 {{0x9e, 0x71}, 0x00}, 186 187 {{0x98, 0x09}, 0x00}, 188 189 {{0x9e, 0xb4}, 0x00}, 190 191 {{0x9e, 0xd9}, 0xff}, 192 {{0x9e, 0xda}, 0xff}, 193 {{0x9e, 0xdb}, 0x23}, 194 {{0x9e, 0xdc}, 0x21}, 195 {{0x9e, 0xdd}, 0x22}, 196 {{0x9e, 0xde}, 0x24}, 197 198 {{0x9c, 0x01}, 0x08}, 199 200 {{0x9e, 0xaa}, 0x01}, 201 202 {{0x9b, 0xd1}, 0x0d}, 203 {{0x9b, 0xd2}, 0x24}, 204 {{0x9b, 0xd3}, 0x0a}, 205 {{0x9b, 0xd4}, 0x22}, 206 {{0x9b, 0xd5}, 0x08}, 207 {{0x9b, 0xd6}, 0x1e}, 208 {{0x9b, 0xdd}, 0x1c}, 209 210 {{0x9b, 0x84}, 0x13}, 211 {{0x99, 0x81}, 0x7f}, 212 {{0x99, 0x31}, 0x70}, 213 214 {{0x98, 0x00}, 0x3f}, 215 216 {{0x9f, 0x09}, 0x00}, 217 218 {{0x9f, 0x0a}, 0x05}, 219 220 {{0x9e, 0xd1}, 0xa1}, 221 {{0x99, 0x23}, 0x00}, 222 223 {{0x9e, 0x74}, 0x80}, 224 225 {{0x9f, 0x28}, 0x10}, 226 227 {{0x9f, 0x35}, 0x14}, 228 229 {{0x9f, 0x36}, 0x60}, 230 231 {{0x9c, 0x31}, 0x00}, 232 233 {{0x9c, 0x32}, 0xc8}, 234 235 {{0x9c, 0x19}, 0x40}, 236 237 {{0x9c, 0x1a}, 0x40}, 238 239 {{0x9c, 0x0c}, 0x00}, 240 241 {{0x9c, 0x0d}, 0x00}, 242 243 {{0x9c, 0x12}, 0x00}, 244 245 {{0x9c, 0x13}, 0x00}, 246 247 {{0x98, 0xa2}, 0x0e}, 248 249 {{0x98, 0x93}, 0x40}, 250 251 {{0x98, 0x7d}, 0x02}, 252 {{0x98, 0x7e}, 0x00}, 253 {{0x9f, 0xc8}, 0x01}, 254 }; 255 struct hw_config *p = hw_config; 256 int count = ARRAY_SIZE(hw_config); 257 struct sk_buff *res_skb; 258 u8 param[4]; 259 int r; 260 261 param[0] = 0; 262 while (count--) { 263 param[1] = p->adr[0]; 264 param[2] = p->adr[1]; 265 param[3] = p->value; 266 267 r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE, PN544_WRITE, 268 param, 4, &res_skb); 269 if (r < 0) 270 return r; 271 272 if (res_skb->len != 1) { 273 kfree_skb(res_skb); 274 return -EPROTO; 275 } 276 277 if (res_skb->data[0] != p->value) { 278 kfree_skb(res_skb); 279 return -EIO; 280 } 281 282 kfree_skb(res_skb); 283 284 p++; 285 } 286 287 param[0] = NFC_HCI_UICC_HOST_ID; 288 r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE, 289 NFC_HCI_ADMIN_WHITELIST, param, 1); 290 if (r < 0) 291 return r; 292 293 param[0] = 0x3d; 294 r = nfc_hci_set_param(hdev, PN544_SYS_MGMT_GATE, 295 PN544_SYS_MGMT_INFO_NOTIFICATION, param, 1); 296 if (r < 0) 297 return r; 298 299 param[0] = 0x0; 300 r = nfc_hci_set_param(hdev, NFC_HCI_RF_READER_A_GATE, 301 PN544_RF_READER_A_AUTO_ACTIVATION, param, 1); 302 if (r < 0) 303 return r; 304 305 r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, 306 NFC_HCI_EVT_END_OPERATION, NULL, 0); 307 if (r < 0) 308 return r; 309 310 param[0] = 0x1; 311 r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, 312 PN544_PL_NFCT_DEACTIVATED, param, 1); 313 if (r < 0) 314 return r; 315 316 param[0] = 0x0; 317 r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, 318 PN544_PL_RDPHASES, param, 1); 319 if (r < 0) 320 return r; 321 322 r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE, 323 PN544_ID_MGMT_FULL_VERSION_SW, &skb); 324 if (r < 0) 325 return r; 326 327 if (skb->len != FULL_VERSION_LEN) { 328 kfree_skb(skb); 329 return -EINVAL; 330 } 331 332 print_hex_dump(KERN_DEBUG, "FULL VERSION SOFTWARE INFO: ", 333 DUMP_PREFIX_NONE, 16, 1, 334 skb->data, FULL_VERSION_LEN, false); 335 336 kfree_skb(skb); 337 338 return 0; 339 } 340 341 static int pn544_hci_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb) 342 { 343 struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); 344 345 return info->phy_ops->write(info->phy_id, skb); 346 } 347 348 static int pn544_hci_start_poll(struct nfc_hci_dev *hdev, 349 u32 im_protocols, u32 tm_protocols) 350 { 351 u8 phases = 0; 352 int r; 353 u8 duration[2]; 354 u8 activated; 355 u8 i_mode = 0x3f; /* Enable all supported modes */ 356 u8 t_mode = 0x0f; 357 u8 t_merge = 0x01; /* Enable merge by default */ 358 359 pr_info(DRIVER_DESC ": %s protocols 0x%x 0x%x\n", 360 __func__, im_protocols, tm_protocols); 361 362 r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, 363 NFC_HCI_EVT_END_OPERATION, NULL, 0); 364 if (r < 0) 365 return r; 366 367 duration[0] = 0x18; 368 duration[1] = 0x6a; 369 r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, 370 PN544_PL_EMULATION, duration, 2); 371 if (r < 0) 372 return r; 373 374 activated = 0; 375 r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, 376 PN544_PL_NFCT_DEACTIVATED, &activated, 1); 377 if (r < 0) 378 return r; 379 380 if (im_protocols & (NFC_PROTO_ISO14443_MASK | NFC_PROTO_MIFARE_MASK | 381 NFC_PROTO_JEWEL_MASK)) 382 phases |= 1; /* Type A */ 383 if (im_protocols & NFC_PROTO_FELICA_MASK) { 384 phases |= (1 << 2); /* Type F 212 */ 385 phases |= (1 << 3); /* Type F 424 */ 386 } 387 388 phases |= (1 << 5); /* NFC active */ 389 390 r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE, 391 PN544_PL_RDPHASES, &phases, 1); 392 if (r < 0) 393 return r; 394 395 if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) { 396 hdev->gb = nfc_get_local_general_bytes(hdev->ndev, 397 &hdev->gb_len); 398 pr_debug("generate local bytes %p", hdev->gb); 399 if (hdev->gb == NULL || hdev->gb_len == 0) { 400 im_protocols &= ~NFC_PROTO_NFC_DEP_MASK; 401 tm_protocols &= ~NFC_PROTO_NFC_DEP_MASK; 402 } 403 } 404 405 if (im_protocols & NFC_PROTO_NFC_DEP_MASK) { 406 r = nfc_hci_send_event(hdev, 407 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 408 NFC_HCI_EVT_END_OPERATION, NULL, 0); 409 if (r < 0) 410 return r; 411 412 r = nfc_hci_set_param(hdev, 413 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 414 PN544_DEP_MODE, &i_mode, 1); 415 if (r < 0) 416 return r; 417 418 r = nfc_hci_set_param(hdev, 419 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 420 PN544_DEP_ATR_REQ, hdev->gb, hdev->gb_len); 421 if (r < 0) 422 return r; 423 424 r = nfc_hci_send_event(hdev, 425 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 426 NFC_HCI_EVT_READER_REQUESTED, NULL, 0); 427 if (r < 0) 428 nfc_hci_send_event(hdev, 429 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 430 NFC_HCI_EVT_END_OPERATION, NULL, 0); 431 } 432 433 if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) { 434 r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, 435 PN544_DEP_MODE, &t_mode, 1); 436 if (r < 0) 437 return r; 438 439 r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, 440 PN544_DEP_ATR_RES, hdev->gb, hdev->gb_len); 441 if (r < 0) 442 return r; 443 444 r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, 445 PN544_DEP_MERGE, &t_merge, 1); 446 if (r < 0) 447 return r; 448 } 449 450 r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, 451 NFC_HCI_EVT_READER_REQUESTED, NULL, 0); 452 if (r < 0) 453 nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE, 454 NFC_HCI_EVT_END_OPERATION, NULL, 0); 455 456 return r; 457 } 458 459 static int pn544_hci_dep_link_up(struct nfc_hci_dev *hdev, 460 struct nfc_target *target, u8 comm_mode, 461 u8 *gb, size_t gb_len) 462 { 463 struct sk_buff *rgb_skb = NULL; 464 int r; 465 466 r = nfc_hci_get_param(hdev, target->hci_reader_gate, 467 PN544_DEP_ATR_RES, &rgb_skb); 468 if (r < 0) 469 return r; 470 471 if (rgb_skb->len == 0 || rgb_skb->len > NFC_GB_MAXSIZE) { 472 r = -EPROTO; 473 goto exit; 474 } 475 print_hex_dump(KERN_DEBUG, "remote gb: ", DUMP_PREFIX_OFFSET, 476 16, 1, rgb_skb->data, rgb_skb->len, true); 477 478 r = nfc_set_remote_general_bytes(hdev->ndev, rgb_skb->data, 479 rgb_skb->len); 480 481 if (r == 0) 482 r = nfc_dep_link_is_up(hdev->ndev, target->idx, comm_mode, 483 NFC_RF_INITIATOR); 484 exit: 485 kfree_skb(rgb_skb); 486 return r; 487 } 488 489 static int pn544_hci_dep_link_down(struct nfc_hci_dev *hdev) 490 { 491 492 return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE, 493 NFC_HCI_EVT_END_OPERATION, NULL, 0); 494 } 495 496 static int pn544_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate, 497 struct nfc_target *target) 498 { 499 switch (gate) { 500 case PN544_RF_READER_F_GATE: 501 target->supported_protocols = NFC_PROTO_FELICA_MASK; 502 break; 503 case PN544_RF_READER_JEWEL_GATE: 504 target->supported_protocols = NFC_PROTO_JEWEL_MASK; 505 target->sens_res = 0x0c00; 506 break; 507 case PN544_RF_READER_NFCIP1_INITIATOR_GATE: 508 target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; 509 break; 510 default: 511 return -EPROTO; 512 } 513 514 return 0; 515 } 516 517 static int pn544_hci_complete_target_discovered(struct nfc_hci_dev *hdev, 518 u8 gate, 519 struct nfc_target *target) 520 { 521 struct sk_buff *uid_skb; 522 int r = 0; 523 524 if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE) 525 return r; 526 527 if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) { 528 r = nfc_hci_send_cmd(hdev, 529 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 530 PN544_HCI_CMD_CONTINUE_ACTIVATION, NULL, 0, NULL); 531 if (r < 0) 532 return r; 533 534 target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE; 535 } else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) { 536 if (target->nfcid1_len != 4 && target->nfcid1_len != 7 && 537 target->nfcid1_len != 10) 538 return -EPROTO; 539 540 r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE, 541 PN544_RF_READER_CMD_ACTIVATE_NEXT, 542 target->nfcid1, target->nfcid1_len, NULL); 543 } else if (target->supported_protocols & NFC_PROTO_FELICA_MASK) { 544 r = nfc_hci_get_param(hdev, PN544_RF_READER_F_GATE, 545 PN544_FELICA_ID, &uid_skb); 546 if (r < 0) 547 return r; 548 549 if (uid_skb->len != 8) { 550 kfree_skb(uid_skb); 551 return -EPROTO; 552 } 553 554 /* Type F NFC-DEP IDm has prefix 0x01FE */ 555 if ((uid_skb->data[0] == 0x01) && (uid_skb->data[1] == 0xfe)) { 556 kfree_skb(uid_skb); 557 r = nfc_hci_send_cmd(hdev, 558 PN544_RF_READER_NFCIP1_INITIATOR_GATE, 559 PN544_HCI_CMD_CONTINUE_ACTIVATION, 560 NULL, 0, NULL); 561 if (r < 0) 562 return r; 563 564 target->supported_protocols = NFC_PROTO_NFC_DEP_MASK; 565 target->hci_reader_gate = 566 PN544_RF_READER_NFCIP1_INITIATOR_GATE; 567 } else { 568 r = nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE, 569 PN544_RF_READER_CMD_ACTIVATE_NEXT, 570 uid_skb->data, uid_skb->len, NULL); 571 kfree_skb(uid_skb); 572 } 573 } else if (target->supported_protocols & NFC_PROTO_ISO14443_MASK) { 574 /* 575 * TODO: maybe other ISO 14443 require some kind of continue 576 * activation, but for now we've seen only this one below. 577 */ 578 if (target->sens_res == 0x4403) /* Type 4 Mifare DESFire */ 579 r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE, 580 PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION, 581 NULL, 0, NULL); 582 } 583 584 return r; 585 } 586 587 #define PN544_CB_TYPE_READER_F 1 588 589 static void pn544_hci_data_exchange_cb(void *context, struct sk_buff *skb, 590 int err) 591 { 592 struct pn544_hci_info *info = context; 593 594 switch (info->async_cb_type) { 595 case PN544_CB_TYPE_READER_F: 596 if (err == 0) 597 skb_pull(skb, 1); 598 info->async_cb(info->async_cb_context, skb, err); 599 break; 600 default: 601 if (err == 0) 602 kfree_skb(skb); 603 break; 604 } 605 } 606 607 #define MIFARE_CMD_AUTH_KEY_A 0x60 608 #define MIFARE_CMD_AUTH_KEY_B 0x61 609 #define MIFARE_CMD_HEADER 2 610 #define MIFARE_UID_LEN 4 611 #define MIFARE_KEY_LEN 6 612 #define MIFARE_CMD_LEN 12 613 /* 614 * Returns: 615 * <= 0: driver handled the data exchange 616 * 1: driver doesn't especially handle, please do standard processing 617 */ 618 static int pn544_hci_im_transceive(struct nfc_hci_dev *hdev, 619 struct nfc_target *target, 620 struct sk_buff *skb, data_exchange_cb_t cb, 621 void *cb_context) 622 { 623 struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); 624 625 pr_info(DRIVER_DESC ": %s for gate=%d\n", __func__, 626 target->hci_reader_gate); 627 628 switch (target->hci_reader_gate) { 629 case NFC_HCI_RF_READER_A_GATE: 630 if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) { 631 /* 632 * It seems that pn544 is inverting key and UID for 633 * MIFARE authentication commands. 634 */ 635 if (skb->len == MIFARE_CMD_LEN && 636 (skb->data[0] == MIFARE_CMD_AUTH_KEY_A || 637 skb->data[0] == MIFARE_CMD_AUTH_KEY_B)) { 638 u8 uid[MIFARE_UID_LEN]; 639 u8 *data = skb->data + MIFARE_CMD_HEADER; 640 641 memcpy(uid, data + MIFARE_KEY_LEN, 642 MIFARE_UID_LEN); 643 memmove(data + MIFARE_UID_LEN, data, 644 MIFARE_KEY_LEN); 645 memcpy(data, uid, MIFARE_UID_LEN); 646 } 647 648 return nfc_hci_send_cmd_async(hdev, 649 target->hci_reader_gate, 650 PN544_MIFARE_CMD, 651 skb->data, skb->len, 652 cb, cb_context); 653 } else 654 return 1; 655 case PN544_RF_READER_F_GATE: 656 *skb_push(skb, 1) = 0; 657 *skb_push(skb, 1) = 0; 658 659 info->async_cb_type = PN544_CB_TYPE_READER_F; 660 info->async_cb = cb; 661 info->async_cb_context = cb_context; 662 663 return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, 664 PN544_FELICA_RAW, skb->data, 665 skb->len, 666 pn544_hci_data_exchange_cb, info); 667 case PN544_RF_READER_JEWEL_GATE: 668 return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate, 669 PN544_JEWEL_RAW_CMD, skb->data, 670 skb->len, cb, cb_context); 671 case PN544_RF_READER_NFCIP1_INITIATOR_GATE: 672 *skb_push(skb, 1) = 0; 673 674 return nfc_hci_send_event(hdev, target->hci_reader_gate, 675 PN544_HCI_EVT_SND_DATA, skb->data, 676 skb->len); 677 default: 678 return 1; 679 } 680 } 681 682 static int pn544_hci_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb) 683 { 684 int r; 685 686 /* Set default false for multiple information chaining */ 687 *skb_push(skb, 1) = 0; 688 689 r = nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE, 690 PN544_HCI_EVT_SND_DATA, skb->data, skb->len); 691 692 kfree_skb(skb); 693 694 return r; 695 } 696 697 static int pn544_hci_check_presence(struct nfc_hci_dev *hdev, 698 struct nfc_target *target) 699 { 700 pr_debug("supported protocol %d", target->supported_protocols); 701 if (target->supported_protocols & (NFC_PROTO_ISO14443_MASK | 702 NFC_PROTO_ISO14443_B_MASK)) { 703 return nfc_hci_send_cmd(hdev, target->hci_reader_gate, 704 PN544_RF_READER_CMD_PRESENCE_CHECK, 705 NULL, 0, NULL); 706 } else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) { 707 if (target->nfcid1_len != 4 && target->nfcid1_len != 7 && 708 target->nfcid1_len != 10) 709 return -EOPNOTSUPP; 710 711 return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE, 712 PN544_RF_READER_CMD_ACTIVATE_NEXT, 713 target->nfcid1, target->nfcid1_len, NULL); 714 } else if (target->supported_protocols & (NFC_PROTO_JEWEL_MASK | 715 NFC_PROTO_FELICA_MASK)) { 716 return -EOPNOTSUPP; 717 } else if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) { 718 return nfc_hci_send_cmd(hdev, target->hci_reader_gate, 719 PN544_HCI_CMD_ATTREQUEST, 720 NULL, 0, NULL); 721 } 722 723 return 0; 724 } 725 726 /* 727 * Returns: 728 * <= 0: driver handled the event, skb consumed 729 * 1: driver does not handle the event, please do standard processing 730 */ 731 static int pn544_hci_event_received(struct nfc_hci_dev *hdev, u8 gate, u8 event, 732 struct sk_buff *skb) 733 { 734 struct sk_buff *rgb_skb = NULL; 735 int r; 736 737 pr_debug("hci event %d", event); 738 switch (event) { 739 case PN544_HCI_EVT_ACTIVATED: 740 if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE) { 741 r = nfc_hci_target_discovered(hdev, gate); 742 } else if (gate == PN544_RF_READER_NFCIP1_TARGET_GATE) { 743 r = nfc_hci_get_param(hdev, gate, PN544_DEP_ATR_REQ, 744 &rgb_skb); 745 if (r < 0) 746 goto exit; 747 748 r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK, 749 NFC_COMM_PASSIVE, rgb_skb->data, 750 rgb_skb->len); 751 752 kfree_skb(rgb_skb); 753 } else { 754 r = -EINVAL; 755 } 756 break; 757 case PN544_HCI_EVT_DEACTIVATED: 758 r = nfc_hci_send_event(hdev, gate, NFC_HCI_EVT_END_OPERATION, 759 NULL, 0); 760 break; 761 case PN544_HCI_EVT_RCV_DATA: 762 if (skb->len < 2) { 763 r = -EPROTO; 764 goto exit; 765 } 766 767 if (skb->data[0] != 0) { 768 pr_debug("data0 %d", skb->data[0]); 769 r = -EPROTO; 770 goto exit; 771 } 772 773 skb_pull(skb, 2); 774 return nfc_tm_data_received(hdev->ndev, skb); 775 default: 776 return 1; 777 } 778 779 exit: 780 kfree_skb(skb); 781 782 return r; 783 } 784 785 static struct nfc_hci_ops pn544_hci_ops = { 786 .open = pn544_hci_open, 787 .close = pn544_hci_close, 788 .hci_ready = pn544_hci_ready, 789 .xmit = pn544_hci_xmit, 790 .start_poll = pn544_hci_start_poll, 791 .dep_link_up = pn544_hci_dep_link_up, 792 .dep_link_down = pn544_hci_dep_link_down, 793 .target_from_gate = pn544_hci_target_from_gate, 794 .complete_target_discovered = pn544_hci_complete_target_discovered, 795 .im_transceive = pn544_hci_im_transceive, 796 .tm_send = pn544_hci_tm_send, 797 .check_presence = pn544_hci_check_presence, 798 .event_received = pn544_hci_event_received, 799 }; 800 801 int pn544_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name, 802 int phy_headroom, int phy_tailroom, int phy_payload, 803 struct nfc_hci_dev **hdev) 804 { 805 struct pn544_hci_info *info; 806 u32 protocols; 807 struct nfc_hci_init_data init_data; 808 int r; 809 810 info = kzalloc(sizeof(struct pn544_hci_info), GFP_KERNEL); 811 if (!info) { 812 pr_err("Cannot allocate memory for pn544_hci_info.\n"); 813 r = -ENOMEM; 814 goto err_info_alloc; 815 } 816 817 info->phy_ops = phy_ops; 818 info->phy_id = phy_id; 819 info->state = PN544_ST_COLD; 820 mutex_init(&info->info_lock); 821 822 init_data.gate_count = ARRAY_SIZE(pn544_gates); 823 824 memcpy(init_data.gates, pn544_gates, sizeof(pn544_gates)); 825 826 /* 827 * TODO: Session id must include the driver name + some bus addr 828 * persistent info to discriminate 2 identical chips 829 */ 830 strcpy(init_data.session_id, "ID544HCI"); 831 832 protocols = NFC_PROTO_JEWEL_MASK | 833 NFC_PROTO_MIFARE_MASK | 834 NFC_PROTO_FELICA_MASK | 835 NFC_PROTO_ISO14443_MASK | 836 NFC_PROTO_ISO14443_B_MASK | 837 NFC_PROTO_NFC_DEP_MASK; 838 839 info->hdev = nfc_hci_allocate_device(&pn544_hci_ops, &init_data, 0, 840 protocols, llc_name, 841 phy_headroom + PN544_CMDS_HEADROOM, 842 phy_tailroom, phy_payload); 843 if (!info->hdev) { 844 pr_err("Cannot allocate nfc hdev.\n"); 845 r = -ENOMEM; 846 goto err_alloc_hdev; 847 } 848 849 nfc_hci_set_clientdata(info->hdev, info); 850 851 r = nfc_hci_register_device(info->hdev); 852 if (r) 853 goto err_regdev; 854 855 *hdev = info->hdev; 856 857 return 0; 858 859 err_regdev: 860 nfc_hci_free_device(info->hdev); 861 862 err_alloc_hdev: 863 kfree(info); 864 865 err_info_alloc: 866 return r; 867 } 868 EXPORT_SYMBOL(pn544_hci_probe); 869 870 void pn544_hci_remove(struct nfc_hci_dev *hdev) 871 { 872 struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev); 873 874 nfc_hci_unregister_device(hdev); 875 nfc_hci_free_device(hdev); 876 kfree(info); 877 } 878 EXPORT_SYMBOL(pn544_hci_remove); 879 880 MODULE_LICENSE("GPL"); 881 MODULE_DESCRIPTION(DRIVER_DESC); 882