1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Driver for NXP PN533 NFC Chip - USB transport layer 4 * 5 * Copyright (C) 2011 Instituto Nokia de Tecnologia 6 * Copyright (C) 2012-2013 Tieto Poland 7 */ 8 9 #include <linux/device.h> 10 #include <linux/kernel.h> 11 #include <linux/module.h> 12 #include <linux/slab.h> 13 #include <linux/usb.h> 14 #include <linux/nfc.h> 15 #include <linux/netdevice.h> 16 #include <net/nfc/nfc.h> 17 #include "pn533.h" 18 19 #define VERSION "0.1" 20 21 #define PN533_VENDOR_ID 0x4CC 22 #define PN533_PRODUCT_ID 0x2533 23 24 #define SCM_VENDOR_ID 0x4E6 25 #define SCL3711_PRODUCT_ID 0x5591 26 27 #define SONY_VENDOR_ID 0x054c 28 #define PASORI_PRODUCT_ID 0x02e1 29 30 #define ACS_VENDOR_ID 0x072f 31 #define ACR122U_PRODUCT_ID 0x2200 32 33 static const struct usb_device_id pn533_usb_table[] = { 34 { USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID), 35 .driver_info = PN533_DEVICE_STD }, 36 { USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID), 37 .driver_info = PN533_DEVICE_STD }, 38 { USB_DEVICE(SONY_VENDOR_ID, PASORI_PRODUCT_ID), 39 .driver_info = PN533_DEVICE_PASORI }, 40 { USB_DEVICE(ACS_VENDOR_ID, ACR122U_PRODUCT_ID), 41 .driver_info = PN533_DEVICE_ACR122U }, 42 { } 43 }; 44 MODULE_DEVICE_TABLE(usb, pn533_usb_table); 45 46 struct pn533_usb_phy { 47 struct usb_device *udev; 48 struct usb_interface *interface; 49 50 struct urb *out_urb; 51 struct urb *in_urb; 52 53 struct urb *ack_urb; 54 u8 *ack_buffer; 55 56 struct pn533 *priv; 57 }; 58 59 static void pn533_recv_response(struct urb *urb) 60 { 61 struct pn533_usb_phy *phy = urb->context; 62 struct sk_buff *skb = NULL; 63 64 if (!urb->status) { 65 skb = alloc_skb(urb->actual_length, GFP_ATOMIC); 66 if (!skb) { 67 nfc_err(&phy->udev->dev, "failed to alloc memory\n"); 68 } else { 69 skb_put_data(skb, urb->transfer_buffer, 70 urb->actual_length); 71 } 72 } 73 74 pn533_recv_frame(phy->priv, skb, urb->status); 75 } 76 77 static int pn533_submit_urb_for_response(struct pn533_usb_phy *phy, gfp_t flags) 78 { 79 phy->in_urb->complete = pn533_recv_response; 80 81 return usb_submit_urb(phy->in_urb, flags); 82 } 83 84 static void pn533_recv_ack(struct urb *urb) 85 { 86 struct pn533_usb_phy *phy = urb->context; 87 struct pn533 *priv = phy->priv; 88 struct pn533_cmd *cmd = priv->cmd; 89 struct pn533_std_frame *in_frame; 90 int rc; 91 92 cmd->status = urb->status; 93 94 switch (urb->status) { 95 case 0: 96 break; /* success */ 97 case -ECONNRESET: 98 case -ENOENT: 99 dev_dbg(&phy->udev->dev, 100 "The urb has been stopped (status %d)\n", 101 urb->status); 102 goto sched_wq; 103 case -ESHUTDOWN: 104 default: 105 nfc_err(&phy->udev->dev, 106 "Urb failure (status %d)\n", urb->status); 107 goto sched_wq; 108 } 109 110 in_frame = phy->in_urb->transfer_buffer; 111 112 if (!pn533_rx_frame_is_ack(in_frame)) { 113 nfc_err(&phy->udev->dev, "Received an invalid ack\n"); 114 cmd->status = -EIO; 115 goto sched_wq; 116 } 117 118 rc = pn533_submit_urb_for_response(phy, GFP_ATOMIC); 119 if (rc) { 120 nfc_err(&phy->udev->dev, 121 "usb_submit_urb failed with result %d\n", rc); 122 cmd->status = rc; 123 goto sched_wq; 124 } 125 126 return; 127 128 sched_wq: 129 queue_work(priv->wq, &priv->cmd_complete_work); 130 } 131 132 static int pn533_submit_urb_for_ack(struct pn533_usb_phy *phy, gfp_t flags) 133 { 134 phy->in_urb->complete = pn533_recv_ack; 135 136 return usb_submit_urb(phy->in_urb, flags); 137 } 138 139 static int pn533_usb_send_ack(struct pn533 *dev, gfp_t flags) 140 { 141 struct pn533_usb_phy *phy = dev->phy; 142 static const u8 ack[6] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00}; 143 /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */ 144 145 if (!phy->ack_buffer) { 146 phy->ack_buffer = kmemdup(ack, sizeof(ack), flags); 147 if (!phy->ack_buffer) 148 return -ENOMEM; 149 } 150 151 phy->ack_urb->transfer_buffer = phy->ack_buffer; 152 phy->ack_urb->transfer_buffer_length = sizeof(ack); 153 return usb_submit_urb(phy->ack_urb, flags); 154 } 155 156 struct pn533_out_arg { 157 struct pn533_usb_phy *phy; 158 struct completion done; 159 }; 160 161 static int pn533_usb_send_frame(struct pn533 *dev, 162 struct sk_buff *out) 163 { 164 struct pn533_usb_phy *phy = dev->phy; 165 struct pn533_out_arg arg; 166 void *cntx; 167 int rc; 168 169 if (phy->priv == NULL) 170 phy->priv = dev; 171 172 phy->out_urb->transfer_buffer = out->data; 173 phy->out_urb->transfer_buffer_length = out->len; 174 175 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1, 176 out->data, out->len, false); 177 178 init_completion(&arg.done); 179 cntx = phy->out_urb->context; 180 phy->out_urb->context = &arg; 181 182 rc = usb_submit_urb(phy->out_urb, GFP_KERNEL); 183 if (rc) 184 return rc; 185 186 wait_for_completion(&arg.done); 187 phy->out_urb->context = cntx; 188 189 if (dev->protocol_type == PN533_PROTO_REQ_RESP) { 190 /* request for response for sent packet directly */ 191 rc = pn533_submit_urb_for_response(phy, GFP_KERNEL); 192 if (rc) 193 goto error; 194 } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) { 195 /* request for ACK if that's the case */ 196 rc = pn533_submit_urb_for_ack(phy, GFP_KERNEL); 197 if (rc) 198 goto error; 199 } 200 201 return 0; 202 203 error: 204 usb_unlink_urb(phy->out_urb); 205 return rc; 206 } 207 208 static void pn533_usb_abort_cmd(struct pn533 *dev, gfp_t flags) 209 { 210 struct pn533_usb_phy *phy = dev->phy; 211 212 /* ACR122U does not support any command which aborts last 213 * issued command i.e. as ACK for standard PN533. Additionally, 214 * it behaves stange, sending broken or incorrect responses, 215 * when we cancel urb before the chip will send response. 216 */ 217 if (dev->device_type == PN533_DEVICE_ACR122U) 218 return; 219 220 /* An ack will cancel the last issued command */ 221 pn533_usb_send_ack(dev, flags); 222 223 /* cancel the urb request */ 224 usb_kill_urb(phy->in_urb); 225 } 226 227 /* ACR122 specific structs and functions */ 228 229 /* ACS ACR122 pn533 frame definitions */ 230 #define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \ 231 + 2) 232 #define PN533_ACR122_TX_FRAME_TAIL_LEN 0 233 #define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \ 234 + 2) 235 #define PN533_ACR122_RX_FRAME_TAIL_LEN 2 236 #define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN 237 238 /* CCID messages types */ 239 #define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62 240 #define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B 241 242 #define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83 243 244 245 struct pn533_acr122_ccid_hdr { 246 u8 type; 247 u32 datalen; 248 u8 slot; 249 u8 seq; 250 251 /* 252 * 3 msg specific bytes or status, error and 1 specific 253 * byte for reposnse msg 254 */ 255 u8 params[3]; 256 u8 data[]; /* payload */ 257 } __packed; 258 259 struct pn533_acr122_apdu_hdr { 260 u8 class; 261 u8 ins; 262 u8 p1; 263 u8 p2; 264 } __packed; 265 266 struct pn533_acr122_tx_frame { 267 struct pn533_acr122_ccid_hdr ccid; 268 struct pn533_acr122_apdu_hdr apdu; 269 u8 datalen; 270 u8 data[]; /* pn533 frame: TFI ... */ 271 } __packed; 272 273 struct pn533_acr122_rx_frame { 274 struct pn533_acr122_ccid_hdr ccid; 275 u8 data[]; /* pn533 frame : TFI ... */ 276 } __packed; 277 278 static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code) 279 { 280 struct pn533_acr122_tx_frame *frame = _frame; 281 282 frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE; 283 /* sizeof(apdu_hdr) + sizeof(datalen) */ 284 frame->ccid.datalen = sizeof(frame->apdu) + 1; 285 frame->ccid.slot = 0; 286 frame->ccid.seq = 0; 287 frame->ccid.params[0] = 0; 288 frame->ccid.params[1] = 0; 289 frame->ccid.params[2] = 0; 290 291 frame->data[0] = PN533_STD_FRAME_DIR_OUT; 292 frame->data[1] = cmd_code; 293 frame->datalen = 2; /* data[0] + data[1] */ 294 295 frame->apdu.class = 0xFF; 296 frame->apdu.ins = 0; 297 frame->apdu.p1 = 0; 298 frame->apdu.p2 = 0; 299 } 300 301 static void pn533_acr122_tx_frame_finish(void *_frame) 302 { 303 struct pn533_acr122_tx_frame *frame = _frame; 304 305 frame->ccid.datalen += frame->datalen; 306 } 307 308 static void pn533_acr122_tx_update_payload_len(void *_frame, int len) 309 { 310 struct pn533_acr122_tx_frame *frame = _frame; 311 312 frame->datalen += len; 313 } 314 315 static bool pn533_acr122_is_rx_frame_valid(void *_frame, struct pn533 *dev) 316 { 317 struct pn533_acr122_rx_frame *frame = _frame; 318 319 if (frame->ccid.type != 0x83) 320 return false; 321 322 if (!frame->ccid.datalen) 323 return false; 324 325 if (frame->data[frame->ccid.datalen - 2] == 0x63) 326 return false; 327 328 return true; 329 } 330 331 static int pn533_acr122_rx_frame_size(void *frame) 332 { 333 struct pn533_acr122_rx_frame *f = frame; 334 335 /* f->ccid.datalen already includes tail length */ 336 return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen; 337 } 338 339 static u8 pn533_acr122_get_cmd_code(void *frame) 340 { 341 struct pn533_acr122_rx_frame *f = frame; 342 343 return PN533_FRAME_CMD(f); 344 } 345 346 static struct pn533_frame_ops pn533_acr122_frame_ops = { 347 .tx_frame_init = pn533_acr122_tx_frame_init, 348 .tx_frame_finish = pn533_acr122_tx_frame_finish, 349 .tx_update_payload_len = pn533_acr122_tx_update_payload_len, 350 .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN, 351 .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN, 352 353 .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid, 354 .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN, 355 .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN, 356 .rx_frame_size = pn533_acr122_rx_frame_size, 357 358 .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN, 359 .get_cmd_code = pn533_acr122_get_cmd_code, 360 }; 361 362 struct pn533_acr122_poweron_rdr_arg { 363 int rc; 364 struct completion done; 365 }; 366 367 static void pn533_acr122_poweron_rdr_resp(struct urb *urb) 368 { 369 struct pn533_acr122_poweron_rdr_arg *arg = urb->context; 370 371 print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1, 372 urb->transfer_buffer, urb->transfer_buffer_length, 373 false); 374 375 arg->rc = urb->status; 376 complete(&arg->done); 377 } 378 379 static int pn533_acr122_poweron_rdr(struct pn533_usb_phy *phy) 380 { 381 /* Power on th reader (CCID cmd) */ 382 u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON, 383 0, 0, 0, 0, 0, 0, 3, 0, 0}; 384 char *buffer; 385 int transferred; 386 int rc; 387 void *cntx; 388 struct pn533_acr122_poweron_rdr_arg arg; 389 390 buffer = kmemdup(cmd, sizeof(cmd), GFP_KERNEL); 391 if (!buffer) 392 return -ENOMEM; 393 394 init_completion(&arg.done); 395 cntx = phy->in_urb->context; /* backup context */ 396 397 phy->in_urb->complete = pn533_acr122_poweron_rdr_resp; 398 phy->in_urb->context = &arg; 399 400 print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1, 401 cmd, sizeof(cmd), false); 402 403 rc = usb_bulk_msg(phy->udev, phy->out_urb->pipe, buffer, sizeof(cmd), 404 &transferred, 5000); 405 kfree(buffer); 406 if (rc || (transferred != sizeof(cmd))) { 407 nfc_err(&phy->udev->dev, 408 "Reader power on cmd error %d\n", rc); 409 return rc; 410 } 411 412 rc = usb_submit_urb(phy->in_urb, GFP_KERNEL); 413 if (rc) { 414 nfc_err(&phy->udev->dev, 415 "Can't submit reader poweron cmd response %d\n", rc); 416 return rc; 417 } 418 419 wait_for_completion(&arg.done); 420 phy->in_urb->context = cntx; /* restore context */ 421 422 return arg.rc; 423 } 424 425 static void pn533_out_complete(struct urb *urb) 426 { 427 struct pn533_out_arg *arg = urb->context; 428 struct pn533_usb_phy *phy = arg->phy; 429 430 switch (urb->status) { 431 case 0: 432 break; /* success */ 433 case -ECONNRESET: 434 case -ENOENT: 435 dev_dbg(&phy->udev->dev, 436 "The urb has been stopped (status %d)\n", 437 urb->status); 438 break; 439 case -ESHUTDOWN: 440 default: 441 nfc_err(&phy->udev->dev, 442 "Urb failure (status %d)\n", 443 urb->status); 444 } 445 446 complete(&arg->done); 447 } 448 449 static void pn533_ack_complete(struct urb *urb) 450 { 451 struct pn533_usb_phy *phy = urb->context; 452 453 switch (urb->status) { 454 case 0: 455 break; /* success */ 456 case -ECONNRESET: 457 case -ENOENT: 458 dev_dbg(&phy->udev->dev, 459 "The urb has been stopped (status %d)\n", 460 urb->status); 461 break; 462 case -ESHUTDOWN: 463 default: 464 nfc_err(&phy->udev->dev, 465 "Urb failure (status %d)\n", 466 urb->status); 467 } 468 } 469 470 static const struct pn533_phy_ops usb_phy_ops = { 471 .send_frame = pn533_usb_send_frame, 472 .send_ack = pn533_usb_send_ack, 473 .abort_cmd = pn533_usb_abort_cmd, 474 }; 475 476 static int pn533_usb_probe(struct usb_interface *interface, 477 const struct usb_device_id *id) 478 { 479 struct pn533 *priv; 480 struct pn533_usb_phy *phy; 481 struct usb_host_interface *iface_desc; 482 struct usb_endpoint_descriptor *endpoint; 483 int in_endpoint = 0; 484 int out_endpoint = 0; 485 int rc = -ENOMEM; 486 int i; 487 u32 protocols; 488 enum pn533_protocol_type protocol_type = PN533_PROTO_REQ_ACK_RESP; 489 struct pn533_frame_ops *fops = NULL; 490 unsigned char *in_buf; 491 int in_buf_len = PN533_EXT_FRAME_HEADER_LEN + 492 PN533_STD_FRAME_MAX_PAYLOAD_LEN + 493 PN533_STD_FRAME_TAIL_LEN; 494 495 phy = devm_kzalloc(&interface->dev, sizeof(*phy), GFP_KERNEL); 496 if (!phy) 497 return -ENOMEM; 498 499 in_buf = kzalloc(in_buf_len, GFP_KERNEL); 500 if (!in_buf) 501 return -ENOMEM; 502 503 phy->udev = usb_get_dev(interface_to_usbdev(interface)); 504 phy->interface = interface; 505 506 iface_desc = interface->cur_altsetting; 507 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { 508 endpoint = &iface_desc->endpoint[i].desc; 509 510 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) 511 in_endpoint = endpoint->bEndpointAddress; 512 513 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) 514 out_endpoint = endpoint->bEndpointAddress; 515 } 516 517 if (!in_endpoint || !out_endpoint) { 518 nfc_err(&interface->dev, 519 "Could not find bulk-in or bulk-out endpoint\n"); 520 rc = -ENODEV; 521 goto error; 522 } 523 524 phy->in_urb = usb_alloc_urb(0, GFP_KERNEL); 525 phy->out_urb = usb_alloc_urb(0, GFP_KERNEL); 526 phy->ack_urb = usb_alloc_urb(0, GFP_KERNEL); 527 528 if (!phy->in_urb || !phy->out_urb || !phy->ack_urb) 529 goto error; 530 531 usb_fill_bulk_urb(phy->in_urb, phy->udev, 532 usb_rcvbulkpipe(phy->udev, in_endpoint), 533 in_buf, in_buf_len, NULL, phy); 534 535 usb_fill_bulk_urb(phy->out_urb, phy->udev, 536 usb_sndbulkpipe(phy->udev, out_endpoint), 537 NULL, 0, pn533_out_complete, phy); 538 usb_fill_bulk_urb(phy->ack_urb, phy->udev, 539 usb_sndbulkpipe(phy->udev, out_endpoint), 540 NULL, 0, pn533_ack_complete, phy); 541 542 switch (id->driver_info) { 543 case PN533_DEVICE_STD: 544 protocols = PN533_ALL_PROTOCOLS; 545 break; 546 547 case PN533_DEVICE_PASORI: 548 protocols = PN533_NO_TYPE_B_PROTOCOLS; 549 break; 550 551 case PN533_DEVICE_ACR122U: 552 protocols = PN533_NO_TYPE_B_PROTOCOLS; 553 fops = &pn533_acr122_frame_ops; 554 protocol_type = PN533_PROTO_REQ_RESP; 555 556 rc = pn533_acr122_poweron_rdr(phy); 557 if (rc < 0) { 558 nfc_err(&interface->dev, 559 "Couldn't poweron the reader (error %d)\n", rc); 560 goto error; 561 } 562 break; 563 564 default: 565 nfc_err(&interface->dev, "Unknown device type %lu\n", 566 id->driver_info); 567 rc = -EINVAL; 568 goto error; 569 } 570 571 priv = pn53x_common_init(id->driver_info, protocol_type, 572 phy, &usb_phy_ops, fops, 573 &phy->udev->dev); 574 575 if (IS_ERR(priv)) { 576 rc = PTR_ERR(priv); 577 goto error; 578 } 579 580 phy->priv = priv; 581 582 rc = pn533_finalize_setup(priv); 583 if (rc) 584 goto err_clean; 585 586 usb_set_intfdata(interface, phy); 587 rc = pn53x_register_nfc(priv, protocols, &interface->dev); 588 if (rc) 589 goto err_clean; 590 591 return 0; 592 593 err_clean: 594 pn53x_common_clean(priv); 595 error: 596 usb_kill_urb(phy->in_urb); 597 usb_kill_urb(phy->out_urb); 598 usb_kill_urb(phy->ack_urb); 599 600 usb_free_urb(phy->in_urb); 601 usb_free_urb(phy->out_urb); 602 usb_free_urb(phy->ack_urb); 603 usb_put_dev(phy->udev); 604 kfree(in_buf); 605 kfree(phy->ack_buffer); 606 607 return rc; 608 } 609 610 static void pn533_usb_disconnect(struct usb_interface *interface) 611 { 612 struct pn533_usb_phy *phy = usb_get_intfdata(interface); 613 614 if (!phy) 615 return; 616 617 pn53x_unregister_nfc(phy->priv); 618 pn53x_common_clean(phy->priv); 619 620 usb_set_intfdata(interface, NULL); 621 622 usb_kill_urb(phy->in_urb); 623 usb_kill_urb(phy->out_urb); 624 usb_kill_urb(phy->ack_urb); 625 626 kfree(phy->in_urb->transfer_buffer); 627 usb_free_urb(phy->in_urb); 628 usb_free_urb(phy->out_urb); 629 usb_free_urb(phy->ack_urb); 630 kfree(phy->ack_buffer); 631 632 nfc_info(&interface->dev, "NXP PN533 NFC device disconnected\n"); 633 } 634 635 static struct usb_driver pn533_usb_driver = { 636 .name = "pn533_usb", 637 .probe = pn533_usb_probe, 638 .disconnect = pn533_usb_disconnect, 639 .id_table = pn533_usb_table, 640 }; 641 642 module_usb_driver(pn533_usb_driver); 643 644 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>"); 645 MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>"); 646 MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>"); 647 MODULE_DESCRIPTION("PN533 USB driver ver " VERSION); 648 MODULE_VERSION(VERSION); 649 MODULE_LICENSE("GPL"); 650