xref: /linux/drivers/nfc/pn533/usb.c (revision 9410645520e9b820069761f3450ef6661418e279)
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 
pn533_recv_response(struct urb * urb)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 
pn533_submit_urb_for_response(struct pn533_usb_phy * phy,gfp_t flags)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 
pn533_recv_ack(struct urb * urb)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 
pn533_submit_urb_for_ack(struct pn533_usb_phy * phy,gfp_t flags)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 
pn533_usb_send_ack(struct pn533 * dev,gfp_t flags)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 
pn533_usb_send_frame(struct pn533 * dev,struct sk_buff * out)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 	arg.phy = phy;
179 	init_completion(&arg.done);
180 	cntx = phy->out_urb->context;
181 	phy->out_urb->context = &arg;
182 
183 	rc = usb_submit_urb(phy->out_urb, GFP_KERNEL);
184 	if (rc)
185 		return rc;
186 
187 	wait_for_completion(&arg.done);
188 	phy->out_urb->context = cntx;
189 
190 	if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
191 		/* request for response for sent packet directly */
192 		rc = pn533_submit_urb_for_response(phy, GFP_KERNEL);
193 		if (rc)
194 			goto error;
195 	} else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
196 		/* request for ACK if that's the case */
197 		rc = pn533_submit_urb_for_ack(phy, GFP_KERNEL);
198 		if (rc)
199 			goto error;
200 	}
201 
202 	return 0;
203 
204 error:
205 	usb_unlink_urb(phy->out_urb);
206 	return rc;
207 }
208 
pn533_usb_abort_cmd(struct pn533 * dev,gfp_t flags)209 static void pn533_usb_abort_cmd(struct pn533 *dev, gfp_t flags)
210 {
211 	struct pn533_usb_phy *phy = dev->phy;
212 
213 	/* ACR122U does not support any command which aborts last
214 	 * issued command i.e. as ACK for standard PN533. Additionally,
215 	 * it behaves stange, sending broken or incorrect responses,
216 	 * when we cancel urb before the chip will send response.
217 	 */
218 	if (dev->device_type == PN533_DEVICE_ACR122U)
219 		return;
220 
221 	/* An ack will cancel the last issued command */
222 	pn533_usb_send_ack(dev, flags);
223 
224 	/* cancel the urb request */
225 	usb_kill_urb(phy->in_urb);
226 }
227 
228 /* ACR122 specific structs and functions */
229 
230 /* ACS ACR122 pn533 frame definitions */
231 #define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
232 					  + 2)
233 #define PN533_ACR122_TX_FRAME_TAIL_LEN 0
234 #define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
235 					  + 2)
236 #define PN533_ACR122_RX_FRAME_TAIL_LEN 2
237 #define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
238 
239 /* CCID messages types */
240 #define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
241 #define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
242 
243 #define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
244 
245 
246 struct pn533_acr122_ccid_hdr {
247 	u8 type;
248 	u32 datalen;
249 	u8 slot;
250 	u8 seq;
251 
252 	/*
253 	 * 3 msg specific bytes or status, error and 1 specific
254 	 * byte for reposnse msg
255 	 */
256 	u8 params[3];
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 
pn533_acr122_tx_frame_init(void * _frame,u8 cmd_code)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 
pn533_acr122_tx_frame_finish(void * _frame)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 
pn533_acr122_tx_update_payload_len(void * _frame,int len)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 
pn533_acr122_is_rx_frame_valid(void * _frame,struct pn533 * dev)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 
pn533_acr122_rx_frame_size(void * frame)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 
pn533_acr122_get_cmd_code(void * frame)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 
pn533_acr122_poweron_rdr_resp(struct urb * urb)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 
pn533_acr122_poweron_rdr(struct pn533_usb_phy * phy)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 
pn533_out_complete(struct urb * urb)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 
pn533_ack_complete(struct urb * urb)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 
pn533_usb_probe(struct usb_interface * interface,const struct usb_device_id * id)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 
pn533_usb_disconnect(struct usb_interface * interface)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