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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
33static 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};
44MODULE_DEVICE_TABLE(usb, pn533_usb_table);
45
46struct 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
59static 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
77static 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
84static 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;
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
128sched_wq:
129 queue_work(priv->wq, &priv->cmd_complete_work);
130}
131
132static 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
139static 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
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
156static int pn533_usb_send_frame(struct pn533 *dev,
157 struct sk_buff *out)
158{
159 struct pn533_usb_phy *phy = dev->phy;
160 int rc;
161
162 if (phy->priv == NULL)
163 phy->priv = dev;
164
165 phy->out_urb->transfer_buffer = out->data;
166 phy->out_urb->transfer_buffer_length = out->len;
167
168 print_hex_dump_debug("PN533 TX: ", DUMP_PREFIX_NONE, 16, 1,
169 out->data, out->len, false);
170
171 rc = usb_submit_urb(phy->out_urb, GFP_KERNEL);
172 if (rc)
173 return rc;
174
175 if (dev->protocol_type == PN533_PROTO_REQ_RESP) {
176
177 rc = pn533_submit_urb_for_response(phy, GFP_KERNEL);
178 if (rc)
179 goto error;
180 } else if (dev->protocol_type == PN533_PROTO_REQ_ACK_RESP) {
181
182 rc = pn533_submit_urb_for_ack(phy, GFP_KERNEL);
183 if (rc)
184 goto error;
185 }
186
187 return 0;
188
189error:
190 usb_unlink_urb(phy->out_urb);
191 return rc;
192}
193
194static void pn533_usb_abort_cmd(struct pn533 *dev, gfp_t flags)
195{
196 struct pn533_usb_phy *phy = dev->phy;
197
198
199
200
201
202
203 if (dev->device_type == PN533_DEVICE_ACR122U)
204 return;
205
206
207 pn533_usb_send_ack(dev, flags);
208
209
210 usb_kill_urb(phy->in_urb);
211}
212
213
214
215
216#define PN533_ACR122_TX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_tx_frame) \
217 + 2)
218#define PN533_ACR122_TX_FRAME_TAIL_LEN 0
219#define PN533_ACR122_RX_FRAME_HEADER_LEN (sizeof(struct pn533_acr122_rx_frame) \
220 + 2)
221#define PN533_ACR122_RX_FRAME_TAIL_LEN 2
222#define PN533_ACR122_FRAME_MAX_PAYLOAD_LEN PN533_STD_FRAME_MAX_PAYLOAD_LEN
223
224
225#define PN533_ACR122_PC_TO_RDR_ICCPOWERON 0x62
226#define PN533_ACR122_PC_TO_RDR_ESCAPE 0x6B
227
228#define PN533_ACR122_RDR_TO_PC_ESCAPE 0x83
229
230
231struct pn533_acr122_ccid_hdr {
232 u8 type;
233 u32 datalen;
234 u8 slot;
235 u8 seq;
236
237
238
239
240
241 u8 params[3];
242 u8 data[];
243} __packed;
244
245struct pn533_acr122_apdu_hdr {
246 u8 class;
247 u8 ins;
248 u8 p1;
249 u8 p2;
250} __packed;
251
252struct pn533_acr122_tx_frame {
253 struct pn533_acr122_ccid_hdr ccid;
254 struct pn533_acr122_apdu_hdr apdu;
255 u8 datalen;
256 u8 data[];
257} __packed;
258
259struct pn533_acr122_rx_frame {
260 struct pn533_acr122_ccid_hdr ccid;
261 u8 data[];
262} __packed;
263
264static void pn533_acr122_tx_frame_init(void *_frame, u8 cmd_code)
265{
266 struct pn533_acr122_tx_frame *frame = _frame;
267
268 frame->ccid.type = PN533_ACR122_PC_TO_RDR_ESCAPE;
269
270 frame->ccid.datalen = sizeof(frame->apdu) + 1;
271 frame->ccid.slot = 0;
272 frame->ccid.seq = 0;
273 frame->ccid.params[0] = 0;
274 frame->ccid.params[1] = 0;
275 frame->ccid.params[2] = 0;
276
277 frame->data[0] = PN533_STD_FRAME_DIR_OUT;
278 frame->data[1] = cmd_code;
279 frame->datalen = 2;
280
281 frame->apdu.class = 0xFF;
282 frame->apdu.ins = 0;
283 frame->apdu.p1 = 0;
284 frame->apdu.p2 = 0;
285}
286
287static void pn533_acr122_tx_frame_finish(void *_frame)
288{
289 struct pn533_acr122_tx_frame *frame = _frame;
290
291 frame->ccid.datalen += frame->datalen;
292}
293
294static void pn533_acr122_tx_update_payload_len(void *_frame, int len)
295{
296 struct pn533_acr122_tx_frame *frame = _frame;
297
298 frame->datalen += len;
299}
300
301static bool pn533_acr122_is_rx_frame_valid(void *_frame, struct pn533 *dev)
302{
303 struct pn533_acr122_rx_frame *frame = _frame;
304
305 if (frame->ccid.type != 0x83)
306 return false;
307
308 if (!frame->ccid.datalen)
309 return false;
310
311 if (frame->data[frame->ccid.datalen - 2] == 0x63)
312 return false;
313
314 return true;
315}
316
317static int pn533_acr122_rx_frame_size(void *frame)
318{
319 struct pn533_acr122_rx_frame *f = frame;
320
321
322 return sizeof(struct pn533_acr122_rx_frame) + f->ccid.datalen;
323}
324
325static u8 pn533_acr122_get_cmd_code(void *frame)
326{
327 struct pn533_acr122_rx_frame *f = frame;
328
329 return PN533_FRAME_CMD(f);
330}
331
332static struct pn533_frame_ops pn533_acr122_frame_ops = {
333 .tx_frame_init = pn533_acr122_tx_frame_init,
334 .tx_frame_finish = pn533_acr122_tx_frame_finish,
335 .tx_update_payload_len = pn533_acr122_tx_update_payload_len,
336 .tx_header_len = PN533_ACR122_TX_FRAME_HEADER_LEN,
337 .tx_tail_len = PN533_ACR122_TX_FRAME_TAIL_LEN,
338
339 .rx_is_frame_valid = pn533_acr122_is_rx_frame_valid,
340 .rx_header_len = PN533_ACR122_RX_FRAME_HEADER_LEN,
341 .rx_tail_len = PN533_ACR122_RX_FRAME_TAIL_LEN,
342 .rx_frame_size = pn533_acr122_rx_frame_size,
343
344 .max_payload_len = PN533_ACR122_FRAME_MAX_PAYLOAD_LEN,
345 .get_cmd_code = pn533_acr122_get_cmd_code,
346};
347
348struct pn533_acr122_poweron_rdr_arg {
349 int rc;
350 struct completion done;
351};
352
353static void pn533_acr122_poweron_rdr_resp(struct urb *urb)
354{
355 struct pn533_acr122_poweron_rdr_arg *arg = urb->context;
356
357 dev_dbg(&urb->dev->dev, "%s\n", __func__);
358
359 print_hex_dump_debug("ACR122 RX: ", DUMP_PREFIX_NONE, 16, 1,
360 urb->transfer_buffer, urb->transfer_buffer_length,
361 false);
362
363 arg->rc = urb->status;
364 complete(&arg->done);
365}
366
367static int pn533_acr122_poweron_rdr(struct pn533_usb_phy *phy)
368{
369
370 u8 cmd[10] = {PN533_ACR122_PC_TO_RDR_ICCPOWERON,
371 0, 0, 0, 0, 0, 0, 3, 0, 0};
372 char *buffer;
373 int transferred;
374 int rc;
375 void *cntx;
376 struct pn533_acr122_poweron_rdr_arg arg;
377
378 dev_dbg(&phy->udev->dev, "%s\n", __func__);
379
380 buffer = kmemdup(cmd, sizeof(cmd), GFP_KERNEL);
381 if (!buffer)
382 return -ENOMEM;
383
384 init_completion(&arg.done);
385 cntx = phy->in_urb->context;
386
387 phy->in_urb->complete = pn533_acr122_poweron_rdr_resp;
388 phy->in_urb->context = &arg;
389
390 print_hex_dump_debug("ACR122 TX: ", DUMP_PREFIX_NONE, 16, 1,
391 cmd, sizeof(cmd), false);
392
393 rc = usb_bulk_msg(phy->udev, phy->out_urb->pipe, buffer, sizeof(cmd),
394 &transferred, 0);
395 kfree(buffer);
396 if (rc || (transferred != sizeof(cmd))) {
397 nfc_err(&phy->udev->dev,
398 "Reader power on cmd error %d\n", rc);
399 return rc;
400 }
401
402 rc = usb_submit_urb(phy->in_urb, GFP_KERNEL);
403 if (rc) {
404 nfc_err(&phy->udev->dev,
405 "Can't submit reader poweron cmd response %d\n", rc);
406 return rc;
407 }
408
409 wait_for_completion(&arg.done);
410 phy->in_urb->context = cntx;
411
412 return arg.rc;
413}
414
415static void pn533_send_complete(struct urb *urb)
416{
417 struct pn533_usb_phy *phy = urb->context;
418
419 switch (urb->status) {
420 case 0:
421 break;
422 case -ECONNRESET:
423 case -ENOENT:
424 dev_dbg(&phy->udev->dev,
425 "The urb has been stopped (status %d)\n",
426 urb->status);
427 break;
428 case -ESHUTDOWN:
429 default:
430 nfc_err(&phy->udev->dev,
431 "Urb failure (status %d)\n",
432 urb->status);
433 }
434}
435
436static struct pn533_phy_ops usb_phy_ops = {
437 .send_frame = pn533_usb_send_frame,
438 .send_ack = pn533_usb_send_ack,
439 .abort_cmd = pn533_usb_abort_cmd,
440};
441
442static int pn533_usb_probe(struct usb_interface *interface,
443 const struct usb_device_id *id)
444{
445 struct pn533 *priv;
446 struct pn533_usb_phy *phy;
447 struct usb_host_interface *iface_desc;
448 struct usb_endpoint_descriptor *endpoint;
449 int in_endpoint = 0;
450 int out_endpoint = 0;
451 int rc = -ENOMEM;
452 int i;
453 u32 protocols;
454 enum pn533_protocol_type protocol_type = PN533_PROTO_REQ_ACK_RESP;
455 struct pn533_frame_ops *fops = NULL;
456 unsigned char *in_buf;
457 int in_buf_len = PN533_EXT_FRAME_HEADER_LEN +
458 PN533_STD_FRAME_MAX_PAYLOAD_LEN +
459 PN533_STD_FRAME_TAIL_LEN;
460
461 phy = devm_kzalloc(&interface->dev, sizeof(*phy), GFP_KERNEL);
462 if (!phy)
463 return -ENOMEM;
464
465 in_buf = kzalloc(in_buf_len, GFP_KERNEL);
466 if (!in_buf)
467 return -ENOMEM;
468
469 phy->udev = usb_get_dev(interface_to_usbdev(interface));
470 phy->interface = interface;
471
472 iface_desc = interface->cur_altsetting;
473 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
474 endpoint = &iface_desc->endpoint[i].desc;
475
476 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
477 in_endpoint = endpoint->bEndpointAddress;
478
479 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
480 out_endpoint = endpoint->bEndpointAddress;
481 }
482
483 if (!in_endpoint || !out_endpoint) {
484 nfc_err(&interface->dev,
485 "Could not find bulk-in or bulk-out endpoint\n");
486 rc = -ENODEV;
487 goto error;
488 }
489
490 phy->in_urb = usb_alloc_urb(0, GFP_KERNEL);
491 phy->out_urb = usb_alloc_urb(0, GFP_KERNEL);
492 phy->ack_urb = usb_alloc_urb(0, GFP_KERNEL);
493
494 if (!phy->in_urb || !phy->out_urb || !phy->ack_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 usb_fill_bulk_urb(phy->ack_urb, phy->udev,
505 usb_sndbulkpipe(phy->udev, out_endpoint),
506 NULL, 0, pn533_send_complete, phy);
507
508 switch (id->driver_info) {
509 case PN533_DEVICE_STD:
510 protocols = PN533_ALL_PROTOCOLS;
511 break;
512
513 case PN533_DEVICE_PASORI:
514 protocols = PN533_NO_TYPE_B_PROTOCOLS;
515 break;
516
517 case PN533_DEVICE_ACR122U:
518 protocols = PN533_NO_TYPE_B_PROTOCOLS;
519 fops = &pn533_acr122_frame_ops;
520 protocol_type = PN533_PROTO_REQ_RESP,
521
522 rc = pn533_acr122_poweron_rdr(phy);
523 if (rc < 0) {
524 nfc_err(&interface->dev,
525 "Couldn't poweron the reader (error %d)\n", rc);
526 goto error;
527 }
528 break;
529
530 default:
531 nfc_err(&interface->dev, "Unknown device type %lu\n",
532 id->driver_info);
533 rc = -EINVAL;
534 goto error;
535 }
536
537 priv = pn533_register_device(id->driver_info, protocols, protocol_type,
538 phy, &usb_phy_ops, fops,
539 &phy->udev->dev, &interface->dev);
540
541 if (IS_ERR(priv)) {
542 rc = PTR_ERR(priv);
543 goto error;
544 }
545
546 phy->priv = priv;
547
548 rc = pn533_finalize_setup(priv);
549 if (rc)
550 goto error;
551
552 usb_set_intfdata(interface, phy);
553
554 return 0;
555
556error:
557 usb_free_urb(phy->in_urb);
558 usb_free_urb(phy->out_urb);
559 usb_free_urb(phy->ack_urb);
560 usb_put_dev(phy->udev);
561 kfree(in_buf);
562
563 return rc;
564}
565
566static void pn533_usb_disconnect(struct usb_interface *interface)
567{
568 struct pn533_usb_phy *phy = usb_get_intfdata(interface);
569
570 if (!phy)
571 return;
572
573 pn533_unregister_device(phy->priv);
574
575 usb_set_intfdata(interface, NULL);
576
577 usb_kill_urb(phy->in_urb);
578 usb_kill_urb(phy->out_urb);
579 usb_kill_urb(phy->ack_urb);
580
581 kfree(phy->in_urb->transfer_buffer);
582 usb_free_urb(phy->in_urb);
583 usb_free_urb(phy->out_urb);
584 usb_free_urb(phy->ack_urb);
585 kfree(phy->ack_buffer);
586
587 nfc_info(&interface->dev, "NXP PN533 NFC device disconnected\n");
588}
589
590static struct usb_driver pn533_usb_driver = {
591 .name = "pn533_usb",
592 .probe = pn533_usb_probe,
593 .disconnect = pn533_usb_disconnect,
594 .id_table = pn533_usb_table,
595};
596
597module_usb_driver(pn533_usb_driver);
598
599MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>");
600MODULE_AUTHOR("Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
601MODULE_AUTHOR("Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>");
602MODULE_DESCRIPTION("PN533 USB driver ver " VERSION);
603MODULE_VERSION(VERSION);
604MODULE_LICENSE("GPL");
605
