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9815c7cf MT |
1 | /* |
2 | * Driver for NXP PN533 NFC Chip - USB transport layer | |
3 | * | |
4 | * Copyright (C) 2011 Instituto Nokia de Tecnologia | |
5 | * Copyright (C) 2012-2013 Tieto Poland | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License as published by | |
9 | * the Free Software Foundation; either version 2 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
20 | ||
21 | #include <linux/device.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/slab.h> | |
25 | #include <linux/usb.h> | |
26 | #include <linux/nfc.h> | |
27 | #include <linux/netdevice.h> | |
28 | #include <net/nfc/nfc.h> | |
29 | #include "pn533.h" | |
30 | ||
31 | #define VERSION "0.1" | |
32 | ||
33 | #define PN533_VENDOR_ID 0x4CC | |
34 | #define PN533_PRODUCT_ID 0x2533 | |
35 | ||
36 | #define SCM_VENDOR_ID 0x4E6 | |
37 | #define SCL3711_PRODUCT_ID 0x5591 | |
38 | ||
39 | #define SONY_VENDOR_ID 0x054c | |
40 | #define PASORI_PRODUCT_ID 0x02e1 | |
41 | ||
42 | #define ACS_VENDOR_ID 0x072f | |
43 | #define ACR122U_PRODUCT_ID 0x2200 | |
44 | ||
45 | static const struct usb_device_id pn533_usb_table[] = { | |
46 | { USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID), | |
47 | .driver_info = PN533_DEVICE_STD }, | |
48 | { USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID), | |
49 | .driver_info = PN533_DEVICE_STD }, | |
50 | { USB_DEVICE(SONY_VENDOR_ID, PASORI_PRODUCT_ID), | |
51 | .driver_info = PN533_DEVICE_PASORI }, | |
52 | { USB_DEVICE(ACS_VENDOR_ID, ACR122U_PRODUCT_ID), | |
53 | .driver_info = PN533_DEVICE_ACR122U }, | |
54 | { } | |
55 | }; | |
56 | MODULE_DEVICE_TABLE(usb, pn533_usb_table); | |
57 | ||
58 | struct pn533_usb_phy { | |
59 | struct usb_device *udev; | |
60 | struct usb_interface *interface; | |
61 | ||
62 | struct urb *out_urb; | |
63 | struct urb *in_urb; | |
64 | ||
65 | struct pn533 *priv; | |
66 | }; | |
67 | ||
68 | static void pn533_recv_response(struct urb *urb) | |
69 | { | |
70 | struct pn533_usb_phy *phy = urb->context; | |
71 | struct sk_buff *skb = NULL; | |
72 | ||
73 | if (!urb->status) { | |
74 | skb = alloc_skb(urb->actual_length, GFP_KERNEL); | |
75 | if (!skb) { | |
76 | nfc_err(&phy->udev->dev, "failed to alloc memory\n"); | |
77 | } else { | |
78 | memcpy(skb_put(skb, urb->actual_length), | |
79 | urb->transfer_buffer, urb->actual_length); | |
80 | } | |
81 | } | |
82 | ||
83 | pn533_recv_frame(phy->priv, skb, urb->status); | |
84 | } | |
85 | ||
86 | static int pn533_submit_urb_for_response(struct pn533_usb_phy *phy, gfp_t flags) | |
87 | { | |
88 | phy->in_urb->complete = pn533_recv_response; | |
89 | ||
90 | return usb_submit_urb(phy->in_urb, flags); | |
91 | } | |
92 | ||
93 | static void pn533_recv_ack(struct urb *urb) | |
94 | { | |
95 | struct pn533_usb_phy *phy = urb->context; | |
96 | struct pn533 *priv = phy->priv; | |
97 | struct pn533_cmd *cmd = priv->cmd; | |
98 | struct pn533_std_frame *in_frame; | |
99 | int rc; | |
100 | ||
101 | cmd->status = urb->status; | |
102 | ||
103 | switch (urb->status) { | |
104 | case 0: | |
105 | break; /* success */ | |
106 | case -ECONNRESET: | |
107 | case -ENOENT: | |
108 | dev_dbg(&phy->udev->dev, | |
109 | "The urb has been stopped (status %d)\n", | |
110 | urb->status); | |
111 | goto sched_wq; | |
112 | case -ESHUTDOWN: | |
113 | default: | |
114 | nfc_err(&phy->udev->dev, | |
115 | "Urb failure (status %d)\n", urb->status); | |
116 | goto sched_wq; | |
117 | } | |
118 | ||
119 | in_frame = phy->in_urb->transfer_buffer; | |
120 | ||
121 | if (!pn533_rx_frame_is_ack(in_frame)) { | |
122 | nfc_err(&phy->udev->dev, "Received an invalid ack\n"); | |
123 | cmd->status = -EIO; | |
124 | goto sched_wq; | |
125 | } | |
126 | ||
127 | rc = pn533_submit_urb_for_response(phy, GFP_ATOMIC); | |
128 | if (rc) { | |
129 | nfc_err(&phy->udev->dev, | |
130 | "usb_submit_urb failed with result %d\n", rc); | |
131 | cmd->status = rc; | |
132 | goto sched_wq; | |
133 | } | |
134 | ||
135 | return; | |
136 | ||
137 | sched_wq: | |
138 | queue_work(priv->wq, &priv->cmd_complete_work); | |
139 | } | |
140 | ||
141 | static int pn533_submit_urb_for_ack(struct pn533_usb_phy *phy, gfp_t flags) | |
142 | { | |
143 | phy->in_urb->complete = pn533_recv_ack; | |
144 | ||
145 | return usb_submit_urb(phy->in_urb, flags); | |
146 | } | |
147 | ||
148 | static int pn533_usb_send_ack(struct pn533 *dev, gfp_t flags) | |
149 | { | |
150 | struct pn533_usb_phy *phy = dev->phy; | |
151 | u8 ack[6] = {0x00, 0x00, 0xff, 0x00, 0xff, 0x00}; | |
152 | /* spec 7.1.1.3: Preamble, SoPC (2), ACK Code (2), Postamble */ | |
153 | int rc; | |
154 | ||
155 | phy->out_urb->transfer_buffer = ack; | |
156 | phy->out_urb->transfer_buffer_length = sizeof(ack); | |
157 | rc = usb_submit_urb(phy->out_urb, flags); | |
158 | ||
159 | return rc; | |
160 | } | |
161 | ||
162 | static int pn533_usb_send_frame(struct pn533 *dev, | |
163 | struct sk_buff *out) | |
164 | { | |
165 | struct pn533_usb_phy *phy = dev->phy; | |
166 | int rc; | |
167 | ||
168 | if (phy->priv == NULL) | |
169 | phy->priv = dev; | |
170 | ||
171 | phy->out_urb->transfer_buffer = out->data; | |
172 | phy->out_urb->transfer_buffer_length = out->len; | |
173 | ||
174 | print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1, | |
175 | out->data, out->len, false); | |
176 | ||
177 | rc = usb_submit_urb(phy->out_urb, GFP_KERNEL); | |
178 | if (rc) | |
179 | return rc; | |
180 | ||
181 | if (dev->protocol_type == PN533_PROTO_REQ_RESP) { | |
182 | /* request for response for sent packet directly */ | |
183 | rc = pn533_submit_urb_for_response(phy, GFP_ATOMIC); | |
184 | if (rc) | |
185 | goto error; | |
186 | } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) { | |
187 | /* request for ACK if that's the case */ | |
188 | rc = pn533_submit_urb_for_ack(phy, GFP_KERNEL); | |
189 | if (rc) | |
190 | goto error; | |
191 | } | |
192 | ||
193 | return 0; | |
194 | ||
195 | error: | |
196 | usb_unlink_urb(phy->out_urb); | |
197 | return rc; | |
198 | } | |
199 | ||
200 | static void pn533_usb_abort_cmd(struct pn533 *dev, gfp_t flags) | |
201 | { | |
202 | struct pn533_usb_phy *phy = dev->phy; | |
203 | ||
204 | /* ACR122U does not support any command which aborts last | |
205 | * issued command i.e. as ACK for standard PN533. Additionally, | |
206 | * it behaves stange, sending broken or incorrect responses, | |
207 | * when we cancel urb before the chip will send response. | |
208 | */ | |
209 | if (dev->device_type == PN533_DEVICE_ACR122U) | |
210 | return; | |
211 | ||
212 | /* An ack will cancel the last issued command */ | |
213 | pn533_usb_send_ack(dev, flags); | |
214 | ||
215 | /* cancel the urb request */ | |
216 | usb_kill_urb(phy->in_urb); | |
217 | } | |
218 | ||
219 | /* ACR122 specific structs and fucntions */ | |
220 | ||
221 | /* ACS ACR122 pn533 frame definitions */ | |
222 | #define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \ | |
223 | + 2) | |
224 | #define PN533_ACR122_TX_FRAME_TAIL_LEN 0 | |
225 | #define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \ | |
226 | + 2) | |
227 | #define PN533_ACR122_RX_FRAME_TAIL_LEN 2 | |
228 | #define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN | |
229 | ||
230 | /* CCID messages types */ | |
231 | #define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62 | |
232 | #define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B | |
233 | ||
234 | #define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83 | |
235 | ||
236 | ||
237 | struct pn533_acr122_ccid_hdr { | |
238 | u8 type; | |
239 | u32 datalen; | |
240 | u8 slot; | |
241 | u8 seq; | |
242 | ||
243 | /* | |
244 | * 3 msg specific bytes or status, error and 1 specific | |
245 | * byte for reposnse msg | |
246 | */ | |
247 | u8 params[3]; | |
248 | u8 data[]; /* payload */ | |
249 | } __packed; | |
250 | ||
251 | struct pn533_acr122_apdu_hdr { | |
252 | u8 class; | |
253 | u8 ins; | |
254 | u8 p1; | |
255 | u8 p2; | |
256 | } __packed; | |
257 | ||
258 | struct pn533_acr122_tx_frame { | |
259 | struct pn533_acr122_ccid_hdr ccid; | |
260 | struct pn533_acr122_apdu_hdr apdu; | |
261 | u8 datalen; | |
262 | u8 data[]; /* pn533 frame: TFI ... */ | |
263 | } __packed; | |
264 | ||
265 | struct pn533_acr122_rx_frame { | |
266 | struct pn533_acr122_ccid_hdr ccid; | |
267 | u8 data[]; /* pn533 frame : TFI ... */ | |
268 | } __packed; | |
269 | ||
270 | static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code) | |
271 | { | |
272 | struct pn533_acr122_tx_frame *frame = _frame; | |
273 | ||
274 | frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE; | |
275 | /* sizeof(apdu_hdr) + sizeof(datalen) */ | |
276 | frame->ccid.datalen = sizeof(frame->apdu) + 1; | |
277 | frame->ccid.slot = 0; | |
278 | frame->ccid.seq = 0; | |
279 | frame->ccid.params[0] = 0; | |
280 | frame->ccid.params[1] = 0; | |
281 | frame->ccid.params[2] = 0; | |
282 | ||
283 | frame->data[0] = PN533_STD_FRAME_DIR_OUT; | |
284 | frame->data[1] = cmd_code; | |
285 | frame->datalen = 2; /* data[0] + data[1] */ | |
286 | ||
287 | frame->apdu.class = 0xFF; | |
288 | frame->apdu.ins = 0; | |
289 | frame->apdu.p1 = 0; | |
290 | frame->apdu.p2 = 0; | |
291 | } | |
292 | ||
293 | static void pn533_acr122_tx_frame_finish(void *_frame) | |
294 | { | |
295 | struct pn533_acr122_tx_frame *frame = _frame; | |
296 | ||
297 | frame->ccid.datalen += frame->datalen; | |
298 | } | |
299 | ||
300 | static void pn533_acr122_tx_update_payload_len(void *_frame, int len) | |
301 | { | |
302 | struct pn533_acr122_tx_frame *frame = _frame; | |
303 | ||
304 | frame->datalen += len; | |
305 | } | |
306 | ||
307 | static bool pn533_acr122_is_rx_frame_valid(void *_frame, struct pn533 *dev) | |
308 | { | |
309 | struct pn533_acr122_rx_frame *frame = _frame; | |
310 | ||
311 | if (frame->ccid.type != 0x83) | |
312 | return false; | |
313 | ||
314 | if (!frame->ccid.datalen) | |
315 | return false; | |
316 | ||
317 | if (frame->data[frame->ccid.datalen - 2] == 0x63) | |
318 | return false; | |
319 | ||
320 | return true; | |
321 | } | |
322 | ||
323 | static int pn533_acr122_rx_frame_size(void *frame) | |
324 | { | |
325 | struct pn533_acr122_rx_frame *f = frame; | |
326 | ||
327 | /* f->ccid.datalen already includes tail length */ | |
328 | return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen; | |
329 | } | |
330 | ||
331 | static u8 pn533_acr122_get_cmd_code(void *frame) | |
332 | { | |
333 | struct pn533_acr122_rx_frame *f = frame; | |
334 | ||
335 | return PN533_FRAME_CMD(f); | |
336 | } | |
337 | ||
338 | static struct pn533_frame_ops pn533_acr122_frame_ops = { | |
339 | .tx_frame_init = pn533_acr122_tx_frame_init, | |
340 | .tx_frame_finish = pn533_acr122_tx_frame_finish, | |
341 | .tx_update_payload_len = pn533_acr122_tx_update_payload_len, | |
342 | .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN, | |
343 | .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN, | |
344 | ||
345 | .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid, | |
346 | .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN, | |
347 | .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN, | |
348 | .rx_frame_size = pn533_acr122_rx_frame_size, | |
349 | ||
350 | .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN, | |
351 | .get_cmd_code = pn533_acr122_get_cmd_code, | |
352 | }; | |
353 | ||
354 | struct pn533_acr122_poweron_rdr_arg { | |
355 | int rc; | |
356 | struct completion done; | |
357 | }; | |
358 | ||
359 | static void pn533_acr122_poweron_rdr_resp(struct urb *urb) | |
360 | { | |
361 | struct pn533_acr122_poweron_rdr_arg *arg = urb->context; | |
362 | ||
363 | dev_dbg(&urb->dev->dev, "%s\n", __func__); | |
364 | ||
365 | print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1, | |
366 | urb->transfer_buffer, urb->transfer_buffer_length, | |
367 | false); | |
368 | ||
369 | arg->rc = urb->status; | |
370 | complete(&arg->done); | |
371 | } | |
372 | ||
373 | static int pn533_acr122_poweron_rdr(struct pn533_usb_phy *phy) | |
374 | { | |
375 | /* Power on th reader (CCID cmd) */ | |
376 | u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON, | |
377 | 0, 0, 0, 0, 0, 0, 3, 0, 0}; | |
378 | int rc; | |
379 | void *cntx; | |
380 | struct pn533_acr122_poweron_rdr_arg arg; | |
381 | ||
382 | dev_dbg(&phy->udev->dev, "%s\n", __func__); | |
383 | ||
384 | init_completion(&arg.done); | |
385 | cntx = phy->in_urb->context; /* backup context */ | |
386 | ||
387 | phy->in_urb->complete = pn533_acr122_poweron_rdr_resp; | |
388 | phy->in_urb->context = &arg; | |
389 | ||
390 | phy->out_urb->transfer_buffer = cmd; | |
391 | phy->out_urb->transfer_buffer_length = sizeof(cmd); | |
392 | ||
393 | print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1, | |
394 | cmd, sizeof(cmd), false); | |
395 | ||
396 | rc = usb_submit_urb(phy->out_urb, GFP_KERNEL); | |
397 | if (rc) { | |
398 | nfc_err(&phy->udev->dev, | |
399 | "Reader power on cmd error %d\n", rc); | |
400 | return rc; | |
401 | } | |
402 | ||
403 | rc = usb_submit_urb(phy->in_urb, GFP_KERNEL); | |
404 | if (rc) { | |
405 | nfc_err(&phy->udev->dev, | |
406 | "Can't submit reader poweron cmd response %d\n", rc); | |
407 | return rc; | |
408 | } | |
409 | ||
410 | wait_for_completion(&arg.done); | |
411 | phy->in_urb->context = cntx; /* restore context */ | |
412 | ||
413 | return arg.rc; | |
414 | } | |
415 | ||
416 | static void pn533_send_complete(struct urb *urb) | |
417 | { | |
418 | struct pn533_usb_phy *phy = urb->context; | |
419 | ||
420 | switch (urb->status) { | |
421 | case 0: | |
422 | break; /* success */ | |
423 | case -ECONNRESET: | |
424 | case -ENOENT: | |
425 | dev_dbg(&phy->udev->dev, | |
426 | "The urb has been stopped (status %d)\n", | |
427 | urb->status); | |
428 | break; | |
429 | case -ESHUTDOWN: | |
430 | default: | |
431 | nfc_err(&phy->udev->dev, | |
432 | "Urb failure (status %d)\n", | |
433 | urb->status); | |
434 | } | |
435 | } | |
436 | ||
437 | static struct pn533_phy_ops usb_phy_ops = { | |
438 | .send_frame = pn533_usb_send_frame, | |
439 | .send_ack = pn533_usb_send_ack, | |
440 | .abort_cmd = pn533_usb_abort_cmd, | |
441 | }; | |
442 | ||
443 | static int pn533_usb_probe(struct usb_interface *interface, | |
444 | const struct usb_device_id *id) | |
445 | { | |
446 | struct pn533 *priv; | |
447 | struct pn533_usb_phy *phy; | |
448 | struct usb_host_interface *iface_desc; | |
449 | struct usb_endpoint_descriptor *endpoint; | |
450 | int in_endpoint = 0; | |
451 | int out_endpoint = 0; | |
452 | int rc = -ENOMEM; | |
453 | int i; | |
454 | u32 protocols; | |
455 | enum pn533_protocol_type protocol_type = PN533_PROTO_REQ_ACK_RESP; | |
456 | struct pn533_frame_ops *fops = NULL; | |
457 | unsigned char *in_buf; | |
458 | int in_buf_len = PN533_EXT_FRAME_HEADER_LEN + | |
459 | PN533_STD_FRAME_MAX_PAYLOAD_LEN + | |
460 | PN533_STD_FRAME_TAIL_LEN; | |
461 | ||
462 | phy = devm_kzalloc(&interface->dev, sizeof(*phy), GFP_KERNEL); | |
463 | if (!phy) | |
464 | return -ENOMEM; | |
465 | ||
466 | in_buf = kzalloc(in_buf_len, GFP_KERNEL); | |
6d2f70ca DC |
467 | if (!in_buf) |
468 | return -ENOMEM; | |
9815c7cf MT |
469 | |
470 | phy->udev = usb_get_dev(interface_to_usbdev(interface)); | |
471 | phy->interface = interface; | |
472 | ||
473 | iface_desc = interface->cur_altsetting; | |
474 | for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) { | |
475 | endpoint = &iface_desc->endpoint[i].desc; | |
476 | ||
477 | if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) | |
478 | in_endpoint = endpoint->bEndpointAddress; | |
479 | ||
480 | if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) | |
481 | out_endpoint = endpoint->bEndpointAddress; | |
482 | } | |
483 | ||
484 | if (!in_endpoint || !out_endpoint) { | |
485 | nfc_err(&interface->dev, | |
486 | "Could not find bulk-in or bulk-out endpoint\n"); | |
487 | rc = -ENODEV; | |
488 | goto error; | |
489 | } | |
490 | ||
491 | phy->in_urb = usb_alloc_urb(0, GFP_KERNEL); | |
492 | phy->out_urb = usb_alloc_urb(0, GFP_KERNEL); | |
493 | ||
494 | if (!phy->in_urb || !phy->out_urb) | |
495 | goto error; | |
496 | ||
497 | usb_fill_bulk_urb(phy->in_urb, phy->udev, | |
498 | usb_rcvbulkpipe(phy->udev, in_endpoint), | |
499 | in_buf, in_buf_len, NULL, phy); | |
500 | ||
501 | usb_fill_bulk_urb(phy->out_urb, phy->udev, | |
502 | usb_sndbulkpipe(phy->udev, out_endpoint), | |
503 | NULL, 0, pn533_send_complete, phy); | |
504 | ||
505 | ||
506 | switch (id->driver_info) { | |
507 | case PN533_DEVICE_STD: | |
508 | protocols = PN533_ALL_PROTOCOLS; | |
509 | break; | |
510 | ||
511 | case PN533_DEVICE_PASORI: | |
512 | protocols = PN533_NO_TYPE_B_PROTOCOLS; | |
513 | break; | |
514 | ||
515 | case PN533_DEVICE_ACR122U: | |
516 | protocols = PN533_NO_TYPE_B_PROTOCOLS; | |
517 | fops = &pn533_acr122_frame_ops; | |
518 | protocol_type = PN533_PROTO_REQ_RESP, | |
519 | ||
520 | rc = pn533_acr122_poweron_rdr(phy); | |
521 | if (rc < 0) { | |
522 | nfc_err(&interface->dev, | |
523 | "Couldn't poweron the reader (error %d)\n", rc); | |
524 | goto error; | |
525 | } | |
526 | break; | |
527 | ||
528 | default: | |
529 | nfc_err(&interface->dev, "Unknown device type %lu\n", | |
530 | id->driver_info); | |
531 | rc = -EINVAL; | |
532 | goto error; | |
533 | } | |
534 | ||
535 | priv = pn533_register_device(id->driver_info, protocols, protocol_type, | |
536 | phy, &usb_phy_ops, fops, | |
b16931b1 | 537 | &phy->udev->dev, &interface->dev); |
9815c7cf MT |
538 | |
539 | if (IS_ERR(priv)) { | |
540 | rc = PTR_ERR(priv); | |
541 | goto error; | |
542 | } | |
543 | ||
544 | phy->priv = priv; | |
9815c7cf MT |
545 | |
546 | usb_set_intfdata(interface, phy); | |
547 | ||
548 | return 0; | |
549 | ||
550 | error: | |
551 | usb_free_urb(phy->in_urb); | |
552 | usb_free_urb(phy->out_urb); | |
553 | usb_put_dev(phy->udev); | |
554 | kfree(in_buf); | |
6d2f70ca | 555 | |
9815c7cf MT |
556 | return rc; |
557 | } | |
558 | ||
559 | static void pn533_usb_disconnect(struct usb_interface *interface) | |
560 | { | |
561 | struct pn533_usb_phy *phy = usb_get_intfdata(interface); | |
562 | ||
563 | if (!phy) | |
564 | return; | |
565 | ||
566 | pn533_unregister_device(phy->priv); | |
567 | ||
568 | usb_set_intfdata(interface, NULL); | |
569 | ||
570 | usb_kill_urb(phy->in_urb); | |
571 | usb_kill_urb(phy->out_urb); | |
572 | ||
573 | kfree(phy->in_urb->transfer_buffer); | |
574 | usb_free_urb(phy->in_urb); | |
575 | usb_free_urb(phy->out_urb); | |
576 | ||
577 | nfc_info(&interface->dev, "NXP PN533 NFC device disconnected\n"); | |
578 | } | |
579 | ||
580 | static struct usb_driver pn533_usb_driver = { | |
581 | .name = "pn533_usb", | |
582 | .probe = pn533_usb_probe, | |
583 | .disconnect = pn533_usb_disconnect, | |
584 | .id_table = pn533_usb_table, | |
585 | }; | |
586 | ||
587 | module_usb_driver(pn533_usb_driver); | |
588 | ||
589 | MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>"); | |
590 | MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>"); | |
591 | MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>"); | |
592 | MODULE_DESCRIPTION("PN533 USB driver ver " VERSION); | |
593 | MODULE_VERSION(VERSION); | |
594 | MODULE_LICENSE("GPL"); |