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Merge tag 'ktest-v3.5-spelling' of git://git.kernel.org/pub/scm/linux/kernel/git...
[deliverable/linux.git] / drivers / nfc / pn533.c
1 /*
2 * Copyright (C) 2011 Instituto Nokia de Tecnologia
3 *
4 * Authors:
5 * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
6 * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the
20 * Free Software Foundation, Inc.,
21 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
22 */
23
24 #include <linux/device.h>
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/slab.h>
28 #include <linux/usb.h>
29 #include <linux/nfc.h>
30 #include <linux/netdevice.h>
31 #include <net/nfc/nfc.h>
32
33 #define VERSION "0.1"
34
35 #define PN533_VENDOR_ID 0x4CC
36 #define PN533_PRODUCT_ID 0x2533
37
38 #define SCM_VENDOR_ID 0x4E6
39 #define SCL3711_PRODUCT_ID 0x5591
40
41 static const struct usb_device_id pn533_table[] = {
42 { USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID) },
43 { USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID) },
44 { }
45 };
46 MODULE_DEVICE_TABLE(usb, pn533_table);
47
48 /* frame definitions */
49 #define PN533_FRAME_TAIL_SIZE 2
50 #define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \
51 PN533_FRAME_TAIL_SIZE)
52 #define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1)
53 #define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen])
54 #define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
55
56 /* start of frame */
57 #define PN533_SOF 0x00FF
58
59 /* frame identifier: in/out/error */
60 #define PN533_FRAME_IDENTIFIER(f) (f->data[0])
61 #define PN533_DIR_OUT 0xD4
62 #define PN533_DIR_IN 0xD5
63
64 /* PN533 Commands */
65 #define PN533_FRAME_CMD(f) (f->data[1])
66 #define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2])
67 #define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2)
68
69 #define PN533_CMD_GET_FIRMWARE_VERSION 0x02
70 #define PN533_CMD_RF_CONFIGURATION 0x32
71 #define PN533_CMD_IN_DATA_EXCHANGE 0x40
72 #define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
73 #define PN533_CMD_IN_ATR 0x50
74 #define PN533_CMD_IN_RELEASE 0x52
75 #define PN533_CMD_IN_JUMP_FOR_DEP 0x56
76
77 #define PN533_CMD_RESPONSE(cmd) (cmd + 1)
78
79 /* PN533 Return codes */
80 #define PN533_CMD_RET_MASK 0x3F
81 #define PN533_CMD_MI_MASK 0x40
82 #define PN533_CMD_RET_SUCCESS 0x00
83
84 struct pn533;
85
86 typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg,
87 u8 *params, int params_len);
88
89 /* structs for pn533 commands */
90
91 /* PN533_CMD_GET_FIRMWARE_VERSION */
92 struct pn533_fw_version {
93 u8 ic;
94 u8 ver;
95 u8 rev;
96 u8 support;
97 };
98
99 /* PN533_CMD_RF_CONFIGURATION */
100 #define PN533_CFGITEM_MAX_RETRIES 0x05
101
102 #define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
103 #define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
104
105 struct pn533_config_max_retries {
106 u8 mx_rty_atr;
107 u8 mx_rty_psl;
108 u8 mx_rty_passive_act;
109 } __packed;
110
111 /* PN533_CMD_IN_LIST_PASSIVE_TARGET */
112
113 /* felica commands opcode */
114 #define PN533_FELICA_OPC_SENSF_REQ 0
115 #define PN533_FELICA_OPC_SENSF_RES 1
116 /* felica SENSF_REQ parameters */
117 #define PN533_FELICA_SENSF_SC_ALL 0xFFFF
118 #define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
119 #define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
120 #define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
121
122 /* type B initiator_data values */
123 #define PN533_TYPE_B_AFI_ALL_FAMILIES 0
124 #define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
125 #define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
126
127 union pn533_cmd_poll_initdata {
128 struct {
129 u8 afi;
130 u8 polling_method;
131 } __packed type_b;
132 struct {
133 u8 opcode;
134 __be16 sc;
135 u8 rc;
136 u8 tsn;
137 } __packed felica;
138 };
139
140 /* Poll modulations */
141 enum {
142 PN533_POLL_MOD_106KBPS_A,
143 PN533_POLL_MOD_212KBPS_FELICA,
144 PN533_POLL_MOD_424KBPS_FELICA,
145 PN533_POLL_MOD_106KBPS_JEWEL,
146 PN533_POLL_MOD_847KBPS_B,
147
148 __PN533_POLL_MOD_AFTER_LAST,
149 };
150 #define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
151
152 struct pn533_poll_modulations {
153 struct {
154 u8 maxtg;
155 u8 brty;
156 union pn533_cmd_poll_initdata initiator_data;
157 } __packed data;
158 u8 len;
159 };
160
161 const struct pn533_poll_modulations poll_mod[] = {
162 [PN533_POLL_MOD_106KBPS_A] = {
163 .data = {
164 .maxtg = 1,
165 .brty = 0,
166 },
167 .len = 2,
168 },
169 [PN533_POLL_MOD_212KBPS_FELICA] = {
170 .data = {
171 .maxtg = 1,
172 .brty = 1,
173 .initiator_data.felica = {
174 .opcode = PN533_FELICA_OPC_SENSF_REQ,
175 .sc = PN533_FELICA_SENSF_SC_ALL,
176 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
177 .tsn = 0,
178 },
179 },
180 .len = 7,
181 },
182 [PN533_POLL_MOD_424KBPS_FELICA] = {
183 .data = {
184 .maxtg = 1,
185 .brty = 2,
186 .initiator_data.felica = {
187 .opcode = PN533_FELICA_OPC_SENSF_REQ,
188 .sc = PN533_FELICA_SENSF_SC_ALL,
189 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
190 .tsn = 0,
191 },
192 },
193 .len = 7,
194 },
195 [PN533_POLL_MOD_106KBPS_JEWEL] = {
196 .data = {
197 .maxtg = 1,
198 .brty = 4,
199 },
200 .len = 2,
201 },
202 [PN533_POLL_MOD_847KBPS_B] = {
203 .data = {
204 .maxtg = 1,
205 .brty = 8,
206 .initiator_data.type_b = {
207 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
208 .polling_method =
209 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
210 },
211 },
212 .len = 3,
213 },
214 };
215
216 /* PN533_CMD_IN_ATR */
217
218 struct pn533_cmd_activate_param {
219 u8 tg;
220 u8 next;
221 } __packed;
222
223 struct pn533_cmd_activate_response {
224 u8 status;
225 u8 nfcid3t[10];
226 u8 didt;
227 u8 bst;
228 u8 brt;
229 u8 to;
230 u8 ppt;
231 /* optional */
232 u8 gt[];
233 } __packed;
234
235 /* PN533_CMD_IN_JUMP_FOR_DEP */
236 struct pn533_cmd_jump_dep {
237 u8 active;
238 u8 baud;
239 u8 next;
240 u8 gt[];
241 } __packed;
242
243 struct pn533_cmd_jump_dep_response {
244 u8 status;
245 u8 tg;
246 u8 nfcid3t[10];
247 u8 didt;
248 u8 bst;
249 u8 brt;
250 u8 to;
251 u8 ppt;
252 /* optional */
253 u8 gt[];
254 } __packed;
255
256 struct pn533 {
257 struct usb_device *udev;
258 struct usb_interface *interface;
259 struct nfc_dev *nfc_dev;
260
261 struct urb *out_urb;
262 int out_maxlen;
263 struct pn533_frame *out_frame;
264
265 struct urb *in_urb;
266 int in_maxlen;
267 struct pn533_frame *in_frame;
268
269 struct sk_buff_head resp_q;
270
271 struct workqueue_struct *wq;
272 struct work_struct cmd_work;
273 struct work_struct mi_work;
274 struct pn533_frame *wq_in_frame;
275 int wq_in_error;
276
277 pn533_cmd_complete_t cmd_complete;
278 void *cmd_complete_arg;
279 struct semaphore cmd_lock;
280 u8 cmd;
281
282 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
283 u8 poll_mod_count;
284 u8 poll_mod_curr;
285 u32 poll_protocols;
286
287 u8 tgt_available_prots;
288 u8 tgt_active_prot;
289 };
290
291 struct pn533_frame {
292 u8 preamble;
293 __be16 start_frame;
294 u8 datalen;
295 u8 datalen_checksum;
296 u8 data[];
297 } __packed;
298
299 /* The rule: value + checksum = 0 */
300 static inline u8 pn533_checksum(u8 value)
301 {
302 return ~value + 1;
303 }
304
305 /* The rule: sum(data elements) + checksum = 0 */
306 static u8 pn533_data_checksum(u8 *data, int datalen)
307 {
308 u8 sum = 0;
309 int i;
310
311 for (i = 0; i < datalen; i++)
312 sum += data[i];
313
314 return pn533_checksum(sum);
315 }
316
317 /**
318 * pn533_tx_frame_ack - create a ack frame
319 * @frame: The frame to be set as ack
320 *
321 * Ack is different type of standard frame. As a standard frame, it has
322 * preamble and start_frame. However the checksum of this frame must fail,
323 * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test
324 * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack.
325 * After datalen_checksum field, the postamble is placed.
326 */
327 static void pn533_tx_frame_ack(struct pn533_frame *frame)
328 {
329 frame->preamble = 0;
330 frame->start_frame = cpu_to_be16(PN533_SOF);
331 frame->datalen = 0;
332 frame->datalen_checksum = 0xFF;
333 /* data[0] is used as postamble */
334 frame->data[0] = 0;
335 }
336
337 static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd)
338 {
339 frame->preamble = 0;
340 frame->start_frame = cpu_to_be16(PN533_SOF);
341 PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT;
342 PN533_FRAME_CMD(frame) = cmd;
343 frame->datalen = 2;
344 }
345
346 static void pn533_tx_frame_finish(struct pn533_frame *frame)
347 {
348 frame->datalen_checksum = pn533_checksum(frame->datalen);
349
350 PN533_FRAME_CHECKSUM(frame) =
351 pn533_data_checksum(frame->data, frame->datalen);
352
353 PN533_FRAME_POSTAMBLE(frame) = 0;
354 }
355
356 static bool pn533_rx_frame_is_valid(struct pn533_frame *frame)
357 {
358 u8 checksum;
359
360 if (frame->start_frame != cpu_to_be16(PN533_SOF))
361 return false;
362
363 checksum = pn533_checksum(frame->datalen);
364 if (checksum != frame->datalen_checksum)
365 return false;
366
367 checksum = pn533_data_checksum(frame->data, frame->datalen);
368 if (checksum != PN533_FRAME_CHECKSUM(frame))
369 return false;
370
371 return true;
372 }
373
374 static bool pn533_rx_frame_is_ack(struct pn533_frame *frame)
375 {
376 if (frame->start_frame != cpu_to_be16(PN533_SOF))
377 return false;
378
379 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
380 return false;
381
382 return true;
383 }
384
385 static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
386 {
387 return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
388 }
389
390
391 static void pn533_wq_cmd_complete(struct work_struct *work)
392 {
393 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
394 struct pn533_frame *in_frame;
395 int rc;
396
397 if (dev == NULL)
398 return;
399
400 in_frame = dev->wq_in_frame;
401
402 if (dev->wq_in_error)
403 rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
404 dev->wq_in_error);
405 else
406 rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
407 PN533_FRAME_CMD_PARAMS_PTR(in_frame),
408 PN533_FRAME_CMD_PARAMS_LEN(in_frame));
409
410 if (rc != -EINPROGRESS)
411 up(&dev->cmd_lock);
412 }
413
414 static void pn533_recv_response(struct urb *urb)
415 {
416 struct pn533 *dev = urb->context;
417 struct pn533_frame *in_frame;
418
419 dev->wq_in_frame = NULL;
420
421 switch (urb->status) {
422 case 0:
423 /* success */
424 break;
425 case -ECONNRESET:
426 case -ENOENT:
427 case -ESHUTDOWN:
428 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
429 " status: %d", urb->status);
430 dev->wq_in_error = urb->status;
431 goto sched_wq;
432 default:
433 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
434 " %d", urb->status);
435 dev->wq_in_error = urb->status;
436 goto sched_wq;
437 }
438
439 in_frame = dev->in_urb->transfer_buffer;
440
441 if (!pn533_rx_frame_is_valid(in_frame)) {
442 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
443 dev->wq_in_error = -EIO;
444 goto sched_wq;
445 }
446
447 if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
448 nfc_dev_err(&dev->interface->dev, "The received frame is not "
449 "response to the last command");
450 dev->wq_in_error = -EIO;
451 goto sched_wq;
452 }
453
454 nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
455 dev->wq_in_error = 0;
456 dev->wq_in_frame = in_frame;
457
458 sched_wq:
459 queue_work(dev->wq, &dev->cmd_work);
460 }
461
462 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
463 {
464 dev->in_urb->complete = pn533_recv_response;
465
466 return usb_submit_urb(dev->in_urb, flags);
467 }
468
469 static void pn533_recv_ack(struct urb *urb)
470 {
471 struct pn533 *dev = urb->context;
472 struct pn533_frame *in_frame;
473 int rc;
474
475 switch (urb->status) {
476 case 0:
477 /* success */
478 break;
479 case -ECONNRESET:
480 case -ENOENT:
481 case -ESHUTDOWN:
482 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
483 " status: %d", urb->status);
484 dev->wq_in_error = urb->status;
485 goto sched_wq;
486 default:
487 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
488 " %d", urb->status);
489 dev->wq_in_error = urb->status;
490 goto sched_wq;
491 }
492
493 in_frame = dev->in_urb->transfer_buffer;
494
495 if (!pn533_rx_frame_is_ack(in_frame)) {
496 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
497 dev->wq_in_error = -EIO;
498 goto sched_wq;
499 }
500
501 nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
502
503 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
504 if (rc) {
505 nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with"
506 " result %d", rc);
507 dev->wq_in_error = rc;
508 goto sched_wq;
509 }
510
511 return;
512
513 sched_wq:
514 dev->wq_in_frame = NULL;
515 queue_work(dev->wq, &dev->cmd_work);
516 }
517
518 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
519 {
520 dev->in_urb->complete = pn533_recv_ack;
521
522 return usb_submit_urb(dev->in_urb, flags);
523 }
524
525 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
526 {
527 int rc;
528
529 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
530
531 pn533_tx_frame_ack(dev->out_frame);
532
533 dev->out_urb->transfer_buffer = dev->out_frame;
534 dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
535 rc = usb_submit_urb(dev->out_urb, flags);
536
537 return rc;
538 }
539
540 static int __pn533_send_cmd_frame_async(struct pn533 *dev,
541 struct pn533_frame *out_frame,
542 struct pn533_frame *in_frame,
543 int in_frame_len,
544 pn533_cmd_complete_t cmd_complete,
545 void *arg, gfp_t flags)
546 {
547 int rc;
548
549 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
550 PN533_FRAME_CMD(out_frame));
551
552 dev->cmd = PN533_FRAME_CMD(out_frame);
553 dev->cmd_complete = cmd_complete;
554 dev->cmd_complete_arg = arg;
555
556 dev->out_urb->transfer_buffer = out_frame;
557 dev->out_urb->transfer_buffer_length =
558 PN533_FRAME_SIZE(out_frame);
559
560 dev->in_urb->transfer_buffer = in_frame;
561 dev->in_urb->transfer_buffer_length = in_frame_len;
562
563 rc = usb_submit_urb(dev->out_urb, flags);
564 if (rc)
565 return rc;
566
567 rc = pn533_submit_urb_for_ack(dev, flags);
568 if (rc)
569 goto error;
570
571 return 0;
572
573 error:
574 usb_unlink_urb(dev->out_urb);
575 return rc;
576 }
577
578 static int pn533_send_cmd_frame_async(struct pn533 *dev,
579 struct pn533_frame *out_frame,
580 struct pn533_frame *in_frame,
581 int in_frame_len,
582 pn533_cmd_complete_t cmd_complete,
583 void *arg, gfp_t flags)
584 {
585 int rc;
586
587 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
588
589 if (down_trylock(&dev->cmd_lock))
590 return -EBUSY;
591
592 rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
593 in_frame_len, cmd_complete, arg, flags);
594 if (rc)
595 goto error;
596
597 return 0;
598 error:
599 up(&dev->cmd_lock);
600 return rc;
601 }
602
603 struct pn533_sync_cmd_response {
604 int rc;
605 struct completion done;
606 };
607
608 static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg,
609 u8 *params, int params_len)
610 {
611 struct pn533_sync_cmd_response *arg = _arg;
612
613 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
614
615 arg->rc = 0;
616
617 if (params_len < 0) /* error */
618 arg->rc = params_len;
619
620 complete(&arg->done);
621
622 return 0;
623 }
624
625 static int pn533_send_cmd_frame_sync(struct pn533 *dev,
626 struct pn533_frame *out_frame,
627 struct pn533_frame *in_frame,
628 int in_frame_len)
629 {
630 int rc;
631 struct pn533_sync_cmd_response arg;
632
633 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
634
635 init_completion(&arg.done);
636
637 rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len,
638 pn533_sync_cmd_complete, &arg, GFP_KERNEL);
639 if (rc)
640 return rc;
641
642 wait_for_completion(&arg.done);
643
644 return arg.rc;
645 }
646
647 static void pn533_send_complete(struct urb *urb)
648 {
649 struct pn533 *dev = urb->context;
650
651 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
652
653 switch (urb->status) {
654 case 0:
655 /* success */
656 break;
657 case -ECONNRESET:
658 case -ENOENT:
659 case -ESHUTDOWN:
660 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
661 " status: %d", urb->status);
662 break;
663 default:
664 nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:"
665 " %d", urb->status);
666 }
667 }
668
669 struct pn533_target_type_a {
670 __be16 sens_res;
671 u8 sel_res;
672 u8 nfcid_len;
673 u8 nfcid_data[];
674 } __packed;
675
676
677 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
678 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
679 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
680
681 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
682 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
683
684 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
685 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
686
687 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
688 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
689 #define PN533_TYPE_A_SEL_PROT_DEP 2
690 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
691
692 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
693 int target_data_len)
694 {
695 u8 ssd;
696 u8 platconf;
697
698 if (target_data_len < sizeof(struct pn533_target_type_a))
699 return false;
700
701 /* The lenght check of nfcid[] and ats[] are not being performed because
702 the values are not being used */
703
704 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
705 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
706 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
707
708 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
709 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
710 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
711 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
712 return false;
713
714 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
715 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
716 return false;
717
718 return true;
719 }
720
721 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
722 int tgt_data_len)
723 {
724 struct pn533_target_type_a *tgt_type_a;
725
726 tgt_type_a = (struct pn533_target_type_a *) tgt_data;
727
728 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
729 return -EPROTO;
730
731 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
732 case PN533_TYPE_A_SEL_PROT_MIFARE:
733 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
734 break;
735 case PN533_TYPE_A_SEL_PROT_ISO14443:
736 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
737 break;
738 case PN533_TYPE_A_SEL_PROT_DEP:
739 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
740 break;
741 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
742 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
743 NFC_PROTO_NFC_DEP_MASK;
744 break;
745 }
746
747 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
748 nfc_tgt->sel_res = tgt_type_a->sel_res;
749 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
750 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
751
752 return 0;
753 }
754
755 struct pn533_target_felica {
756 u8 pol_res;
757 u8 opcode;
758 u8 nfcid2[8];
759 u8 pad[8];
760 /* optional */
761 u8 syst_code[];
762 } __packed;
763
764 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
765 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
766
767 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
768 int target_data_len)
769 {
770 if (target_data_len < sizeof(struct pn533_target_felica))
771 return false;
772
773 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
774 return false;
775
776 return true;
777 }
778
779 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
780 int tgt_data_len)
781 {
782 struct pn533_target_felica *tgt_felica;
783
784 tgt_felica = (struct pn533_target_felica *) tgt_data;
785
786 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
787 return -EPROTO;
788
789 if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 &&
790 tgt_felica->nfcid2[1] ==
791 PN533_FELICA_SENSF_NFCID2_DEP_B2)
792 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
793 else
794 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
795
796 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
797 nfc_tgt->sensf_res_len = 9;
798
799 return 0;
800 }
801
802 struct pn533_target_jewel {
803 __be16 sens_res;
804 u8 jewelid[4];
805 } __packed;
806
807 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
808 int target_data_len)
809 {
810 u8 ssd;
811 u8 platconf;
812
813 if (target_data_len < sizeof(struct pn533_target_jewel))
814 return false;
815
816 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
817 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
818 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
819
820 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
821 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
822 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
823 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
824 return false;
825
826 return true;
827 }
828
829 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
830 int tgt_data_len)
831 {
832 struct pn533_target_jewel *tgt_jewel;
833
834 tgt_jewel = (struct pn533_target_jewel *) tgt_data;
835
836 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
837 return -EPROTO;
838
839 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
840 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
841 nfc_tgt->nfcid1_len = 4;
842 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
843
844 return 0;
845 }
846
847 struct pn533_type_b_prot_info {
848 u8 bitrate;
849 u8 fsci_type;
850 u8 fwi_adc_fo;
851 } __packed;
852
853 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
854 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
855 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
856
857 struct pn533_type_b_sens_res {
858 u8 opcode;
859 u8 nfcid[4];
860 u8 appdata[4];
861 struct pn533_type_b_prot_info prot_info;
862 } __packed;
863
864 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
865
866 struct pn533_target_type_b {
867 struct pn533_type_b_sens_res sensb_res;
868 u8 attrib_res_len;
869 u8 attrib_res[];
870 } __packed;
871
872 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
873 int target_data_len)
874 {
875 if (target_data_len < sizeof(struct pn533_target_type_b))
876 return false;
877
878 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
879 return false;
880
881 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
882 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
883 return false;
884
885 return true;
886 }
887
888 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
889 int tgt_data_len)
890 {
891 struct pn533_target_type_b *tgt_type_b;
892
893 tgt_type_b = (struct pn533_target_type_b *) tgt_data;
894
895 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
896 return -EPROTO;
897
898 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
899
900 return 0;
901 }
902
903 struct pn533_poll_response {
904 u8 nbtg;
905 u8 tg;
906 u8 target_data[];
907 } __packed;
908
909 static int pn533_target_found(struct pn533 *dev,
910 struct pn533_poll_response *resp, int resp_len)
911 {
912 int target_data_len;
913 struct nfc_target nfc_tgt;
914 int rc;
915
916 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
917 dev->poll_mod_curr);
918
919 if (resp->tg != 1)
920 return -EPROTO;
921
922 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
923
924 target_data_len = resp_len - sizeof(struct pn533_poll_response);
925
926 switch (dev->poll_mod_curr) {
927 case PN533_POLL_MOD_106KBPS_A:
928 rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
929 target_data_len);
930 break;
931 case PN533_POLL_MOD_212KBPS_FELICA:
932 case PN533_POLL_MOD_424KBPS_FELICA:
933 rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
934 target_data_len);
935 break;
936 case PN533_POLL_MOD_106KBPS_JEWEL:
937 rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
938 target_data_len);
939 break;
940 case PN533_POLL_MOD_847KBPS_B:
941 rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
942 target_data_len);
943 break;
944 default:
945 nfc_dev_err(&dev->interface->dev, "Unknown current poll"
946 " modulation");
947 return -EPROTO;
948 }
949
950 if (rc)
951 return rc;
952
953 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
954 nfc_dev_dbg(&dev->interface->dev, "The target found does not"
955 " have the desired protocol");
956 return -EAGAIN;
957 }
958
959 nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
960 "0x%x", nfc_tgt.supported_protocols);
961
962 dev->tgt_available_prots = nfc_tgt.supported_protocols;
963
964 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
965
966 return 0;
967 }
968
969 static void pn533_poll_reset_mod_list(struct pn533 *dev)
970 {
971 dev->poll_mod_count = 0;
972 }
973
974 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
975 {
976 dev->poll_mod_active[dev->poll_mod_count] =
977 (struct pn533_poll_modulations *) &poll_mod[mod_index];
978 dev->poll_mod_count++;
979 }
980
981 static void pn533_poll_create_mod_list(struct pn533 *dev, u32 protocols)
982 {
983 pn533_poll_reset_mod_list(dev);
984
985 if (protocols & NFC_PROTO_MIFARE_MASK
986 || protocols & NFC_PROTO_ISO14443_MASK
987 || protocols & NFC_PROTO_NFC_DEP_MASK)
988 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
989
990 if (protocols & NFC_PROTO_FELICA_MASK
991 || protocols & NFC_PROTO_NFC_DEP_MASK) {
992 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
993 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
994 }
995
996 if (protocols & NFC_PROTO_JEWEL_MASK)
997 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
998
999 if (protocols & NFC_PROTO_ISO14443_MASK)
1000 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
1001 }
1002
1003 static void pn533_start_poll_frame(struct pn533_frame *frame,
1004 struct pn533_poll_modulations *mod)
1005 {
1006
1007 pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
1008
1009 memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
1010 frame->datalen += mod->len;
1011
1012 pn533_tx_frame_finish(frame);
1013 }
1014
1015 static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
1016 u8 *params, int params_len)
1017 {
1018 struct pn533_poll_response *resp;
1019 struct pn533_poll_modulations *next_mod;
1020 int rc;
1021
1022 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1023
1024 if (params_len == -ENOENT) {
1025 nfc_dev_dbg(&dev->interface->dev, "Polling operation has been"
1026 " stopped");
1027 goto stop_poll;
1028 }
1029
1030 if (params_len < 0) {
1031 nfc_dev_err(&dev->interface->dev, "Error %d when running poll",
1032 params_len);
1033 goto stop_poll;
1034 }
1035
1036 resp = (struct pn533_poll_response *) params;
1037 if (resp->nbtg) {
1038 rc = pn533_target_found(dev, resp, params_len);
1039
1040 /* We must stop the poll after a valid target found */
1041 if (rc == 0)
1042 goto stop_poll;
1043
1044 if (rc != -EAGAIN)
1045 nfc_dev_err(&dev->interface->dev, "The target found is"
1046 " not valid - continuing to poll");
1047 }
1048
1049 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1050
1051 next_mod = dev->poll_mod_active[dev->poll_mod_curr];
1052
1053 nfc_dev_dbg(&dev->interface->dev, "Polling next modulation (0x%x)",
1054 dev->poll_mod_curr);
1055
1056 pn533_start_poll_frame(dev->out_frame, next_mod);
1057
1058 /* Don't need to down the semaphore again */
1059 rc = __pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1060 dev->in_maxlen, pn533_start_poll_complete,
1061 NULL, GFP_ATOMIC);
1062
1063 if (rc == -EPERM) {
1064 nfc_dev_dbg(&dev->interface->dev, "Cannot poll next modulation"
1065 " because poll has been stopped");
1066 goto stop_poll;
1067 }
1068
1069 if (rc) {
1070 nfc_dev_err(&dev->interface->dev, "Error %d when trying to poll"
1071 " next modulation", rc);
1072 goto stop_poll;
1073 }
1074
1075 /* Inform caller function to do not up the semaphore */
1076 return -EINPROGRESS;
1077
1078 stop_poll:
1079 pn533_poll_reset_mod_list(dev);
1080 dev->poll_protocols = 0;
1081 return 0;
1082 }
1083
1084 static int pn533_start_poll(struct nfc_dev *nfc_dev, u32 protocols)
1085 {
1086 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1087 struct pn533_poll_modulations *start_mod;
1088 int rc;
1089
1090 nfc_dev_dbg(&dev->interface->dev, "%s - protocols=0x%x", __func__,
1091 protocols);
1092
1093 if (dev->poll_mod_count) {
1094 nfc_dev_err(&dev->interface->dev, "Polling operation already"
1095 " active");
1096 return -EBUSY;
1097 }
1098
1099 if (dev->tgt_active_prot) {
1100 nfc_dev_err(&dev->interface->dev, "Cannot poll with a target"
1101 " already activated");
1102 return -EBUSY;
1103 }
1104
1105 pn533_poll_create_mod_list(dev, protocols);
1106
1107 if (!dev->poll_mod_count) {
1108 nfc_dev_err(&dev->interface->dev, "No valid protocols"
1109 " specified");
1110 rc = -EINVAL;
1111 goto error;
1112 }
1113
1114 nfc_dev_dbg(&dev->interface->dev, "It will poll %d modulations types",
1115 dev->poll_mod_count);
1116
1117 dev->poll_mod_curr = 0;
1118 start_mod = dev->poll_mod_active[dev->poll_mod_curr];
1119
1120 pn533_start_poll_frame(dev->out_frame, start_mod);
1121
1122 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1123 dev->in_maxlen, pn533_start_poll_complete,
1124 NULL, GFP_KERNEL);
1125
1126 if (rc) {
1127 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1128 " start poll", rc);
1129 goto error;
1130 }
1131
1132 dev->poll_protocols = protocols;
1133
1134 return 0;
1135
1136 error:
1137 pn533_poll_reset_mod_list(dev);
1138 return rc;
1139 }
1140
1141 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1142 {
1143 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1144
1145 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1146
1147 if (!dev->poll_mod_count) {
1148 nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
1149 " running");
1150 return;
1151 }
1152
1153 /* An ack will cancel the last issued command (poll) */
1154 pn533_send_ack(dev, GFP_KERNEL);
1155
1156 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1157 usb_kill_urb(dev->in_urb);
1158 }
1159
1160 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1161 {
1162 struct pn533_cmd_activate_param param;
1163 struct pn533_cmd_activate_response *resp;
1164 u16 gt_len;
1165 int rc;
1166
1167 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1168
1169 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
1170
1171 param.tg = 1;
1172 param.next = 0;
1173 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &param,
1174 sizeof(struct pn533_cmd_activate_param));
1175 dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
1176
1177 pn533_tx_frame_finish(dev->out_frame);
1178
1179 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1180 dev->in_maxlen);
1181 if (rc)
1182 return rc;
1183
1184 resp = (struct pn533_cmd_activate_response *)
1185 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1186 rc = resp->status & PN533_CMD_RET_MASK;
1187 if (rc != PN533_CMD_RET_SUCCESS)
1188 return -EIO;
1189
1190 /* ATR_RES general bytes are located at offset 16 */
1191 gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
1192 rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
1193
1194 return rc;
1195 }
1196
1197 static int pn533_activate_target(struct nfc_dev *nfc_dev, u32 target_idx,
1198 u32 protocol)
1199 {
1200 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1201 int rc;
1202
1203 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1204 protocol);
1205
1206 if (dev->poll_mod_count) {
1207 nfc_dev_err(&dev->interface->dev, "Cannot activate while"
1208 " polling");
1209 return -EBUSY;
1210 }
1211
1212 if (dev->tgt_active_prot) {
1213 nfc_dev_err(&dev->interface->dev, "There is already an active"
1214 " target");
1215 return -EBUSY;
1216 }
1217
1218 if (!dev->tgt_available_prots) {
1219 nfc_dev_err(&dev->interface->dev, "There is no available target"
1220 " to activate");
1221 return -EINVAL;
1222 }
1223
1224 if (!(dev->tgt_available_prots & (1 << protocol))) {
1225 nfc_dev_err(&dev->interface->dev, "The target does not support"
1226 " the requested protocol %u", protocol);
1227 return -EINVAL;
1228 }
1229
1230 if (protocol == NFC_PROTO_NFC_DEP) {
1231 rc = pn533_activate_target_nfcdep(dev);
1232 if (rc) {
1233 nfc_dev_err(&dev->interface->dev, "Error %d when"
1234 " activating target with"
1235 " NFC_DEP protocol", rc);
1236 return rc;
1237 }
1238 }
1239
1240 dev->tgt_active_prot = protocol;
1241 dev->tgt_available_prots = 0;
1242
1243 return 0;
1244 }
1245
1246 static void pn533_deactivate_target(struct nfc_dev *nfc_dev, u32 target_idx)
1247 {
1248 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1249 u8 tg;
1250 u8 status;
1251 int rc;
1252
1253 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1254
1255 if (!dev->tgt_active_prot) {
1256 nfc_dev_err(&dev->interface->dev, "There is no active target");
1257 return;
1258 }
1259
1260 dev->tgt_active_prot = 0;
1261
1262 skb_queue_purge(&dev->resp_q);
1263
1264 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
1265
1266 tg = 1;
1267 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
1268 dev->out_frame->datalen += sizeof(u8);
1269
1270 pn533_tx_frame_finish(dev->out_frame);
1271
1272 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1273 dev->in_maxlen);
1274 if (rc) {
1275 nfc_dev_err(&dev->interface->dev, "Error when sending release"
1276 " command to the controller");
1277 return;
1278 }
1279
1280 status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
1281 rc = status & PN533_CMD_RET_MASK;
1282 if (rc != PN533_CMD_RET_SUCCESS)
1283 nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
1284 " the target", rc);
1285
1286 return;
1287 }
1288
1289
1290 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1291 u8 *params, int params_len)
1292 {
1293 struct pn533_cmd_jump_dep *cmd;
1294 struct pn533_cmd_jump_dep_response *resp;
1295 struct nfc_target nfc_target;
1296 u8 target_gt_len;
1297 int rc;
1298
1299 if (params_len == -ENOENT) {
1300 nfc_dev_dbg(&dev->interface->dev, "");
1301 return 0;
1302 }
1303
1304 if (params_len < 0) {
1305 nfc_dev_err(&dev->interface->dev,
1306 "Error %d when bringing DEP link up",
1307 params_len);
1308 return 0;
1309 }
1310
1311 if (dev->tgt_available_prots &&
1312 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1313 nfc_dev_err(&dev->interface->dev,
1314 "The target does not support DEP");
1315 return -EINVAL;
1316 }
1317
1318 resp = (struct pn533_cmd_jump_dep_response *) params;
1319 cmd = (struct pn533_cmd_jump_dep *) arg;
1320 rc = resp->status & PN533_CMD_RET_MASK;
1321 if (rc != PN533_CMD_RET_SUCCESS) {
1322 nfc_dev_err(&dev->interface->dev,
1323 "Bringing DEP link up failed %d", rc);
1324 return 0;
1325 }
1326
1327 if (!dev->tgt_available_prots) {
1328 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1329
1330 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1331 nfc_target.nfcid1_len = 10;
1332 memcpy(nfc_target.nfcid1, resp->nfcid3t, nfc_target.nfcid1_len);
1333 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1334 if (rc)
1335 return 0;
1336
1337 dev->tgt_available_prots = 0;
1338 }
1339
1340 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1341
1342 /* ATR_RES general bytes are located at offset 17 */
1343 target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17;
1344 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1345 resp->gt, target_gt_len);
1346 if (rc == 0)
1347 rc = nfc_dep_link_is_up(dev->nfc_dev,
1348 dev->nfc_dev->targets[0].idx,
1349 !cmd->active, NFC_RF_INITIATOR);
1350
1351 return 0;
1352 }
1353
1354 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, int target_idx,
1355 u8 comm_mode, u8* gb, size_t gb_len)
1356 {
1357 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1358 struct pn533_cmd_jump_dep *cmd;
1359 u8 cmd_len;
1360 int rc;
1361
1362 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1363
1364 if (dev->poll_mod_count) {
1365 nfc_dev_err(&dev->interface->dev,
1366 "Cannot bring the DEP link up while polling");
1367 return -EBUSY;
1368 }
1369
1370 if (dev->tgt_active_prot) {
1371 nfc_dev_err(&dev->interface->dev,
1372 "There is already an active target");
1373 return -EBUSY;
1374 }
1375
1376 cmd_len = sizeof(struct pn533_cmd_jump_dep) + gb_len;
1377 cmd = kzalloc(cmd_len, GFP_KERNEL);
1378 if (cmd == NULL)
1379 return -ENOMEM;
1380
1381 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
1382
1383 cmd->active = !comm_mode;
1384 cmd->baud = 0;
1385 if (gb != NULL && gb_len > 0) {
1386 cmd->next = 4; /* We have some Gi */
1387 memcpy(cmd->gt, gb, gb_len);
1388 } else {
1389 cmd->next = 0;
1390 }
1391
1392 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len);
1393 dev->out_frame->datalen += cmd_len;
1394
1395 pn533_tx_frame_finish(dev->out_frame);
1396
1397 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1398 dev->in_maxlen, pn533_in_dep_link_up_complete,
1399 cmd, GFP_KERNEL);
1400 if (rc)
1401 goto out;
1402
1403
1404 out:
1405 kfree(cmd);
1406
1407 return rc;
1408 }
1409
1410 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1411 {
1412 pn533_deactivate_target(nfc_dev, 0);
1413
1414 return 0;
1415 }
1416
1417 #define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3)
1418 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1419
1420 static int pn533_data_exchange_tx_frame(struct pn533 *dev, struct sk_buff *skb)
1421 {
1422 int payload_len = skb->len;
1423 struct pn533_frame *out_frame;
1424 u8 tg;
1425
1426 nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__,
1427 payload_len);
1428
1429 if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
1430 /* TODO: Implement support to multi-part data exchange */
1431 nfc_dev_err(&dev->interface->dev, "Data length greater than the"
1432 " max allowed: %d",
1433 PN533_CMD_DATAEXCH_DATA_MAXLEN);
1434 return -ENOSYS;
1435 }
1436
1437 skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN);
1438 out_frame = (struct pn533_frame *) skb->data;
1439
1440 pn533_tx_frame_init(out_frame, PN533_CMD_IN_DATA_EXCHANGE);
1441
1442 tg = 1;
1443 memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame), &tg, sizeof(u8));
1444 out_frame->datalen += sizeof(u8);
1445
1446 /* The data is already in the out_frame, just update the datalen */
1447 out_frame->datalen += payload_len;
1448
1449 pn533_tx_frame_finish(out_frame);
1450 skb_put(skb, PN533_FRAME_TAIL_SIZE);
1451
1452 return 0;
1453 }
1454
1455 struct pn533_data_exchange_arg {
1456 struct sk_buff *skb_resp;
1457 struct sk_buff *skb_out;
1458 data_exchange_cb_t cb;
1459 void *cb_context;
1460 };
1461
1462 static struct sk_buff *pn533_build_response(struct pn533 *dev)
1463 {
1464 struct sk_buff *skb, *tmp, *t;
1465 unsigned int skb_len = 0, tmp_len = 0;
1466
1467 nfc_dev_dbg(&dev->interface->dev, "%s\n", __func__);
1468
1469 if (skb_queue_empty(&dev->resp_q))
1470 return NULL;
1471
1472 if (skb_queue_len(&dev->resp_q) == 1) {
1473 skb = skb_dequeue(&dev->resp_q);
1474 goto out;
1475 }
1476
1477 skb_queue_walk_safe(&dev->resp_q, tmp, t)
1478 skb_len += tmp->len;
1479
1480 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
1481 __func__, skb_len);
1482
1483 skb = alloc_skb(skb_len, GFP_KERNEL);
1484 if (skb == NULL)
1485 goto out;
1486
1487 skb_put(skb, skb_len);
1488
1489 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
1490 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
1491 tmp_len += tmp->len;
1492 }
1493
1494 out:
1495 skb_queue_purge(&dev->resp_q);
1496
1497 return skb;
1498 }
1499
1500 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
1501 u8 *params, int params_len)
1502 {
1503 struct pn533_data_exchange_arg *arg = _arg;
1504 struct sk_buff *skb = NULL, *skb_resp = arg->skb_resp;
1505 struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
1506 int err = 0;
1507 u8 status;
1508 u8 cmd_ret;
1509
1510 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1511
1512 dev_kfree_skb(arg->skb_out);
1513
1514 if (params_len < 0) { /* error */
1515 err = params_len;
1516 goto error;
1517 }
1518
1519 status = params[0];
1520
1521 cmd_ret = status & PN533_CMD_RET_MASK;
1522 if (cmd_ret != PN533_CMD_RET_SUCCESS) {
1523 nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when"
1524 " exchanging data", cmd_ret);
1525 err = -EIO;
1526 goto error;
1527 }
1528
1529 skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
1530 skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
1531 skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
1532 skb_queue_tail(&dev->resp_q, skb_resp);
1533
1534 if (status & PN533_CMD_MI_MASK) {
1535 queue_work(dev->wq, &dev->mi_work);
1536 return -EINPROGRESS;
1537 }
1538
1539 skb = pn533_build_response(dev);
1540 if (skb == NULL)
1541 goto error;
1542
1543 arg->cb(arg->cb_context, skb, 0);
1544 kfree(arg);
1545 return 0;
1546
1547 error:
1548 skb_queue_purge(&dev->resp_q);
1549 dev_kfree_skb(skb_resp);
1550 arg->cb(arg->cb_context, NULL, err);
1551 kfree(arg);
1552 return 0;
1553 }
1554
1555 static int pn533_data_exchange(struct nfc_dev *nfc_dev, u32 target_idx,
1556 struct sk_buff *skb,
1557 data_exchange_cb_t cb,
1558 void *cb_context)
1559 {
1560 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1561 struct pn533_frame *out_frame, *in_frame;
1562 struct pn533_data_exchange_arg *arg;
1563 struct sk_buff *skb_resp;
1564 int skb_resp_len;
1565 int rc;
1566
1567 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1568
1569 if (!dev->tgt_active_prot) {
1570 nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
1571 " there is no active target");
1572 rc = -EINVAL;
1573 goto error;
1574 }
1575
1576 rc = pn533_data_exchange_tx_frame(dev, skb);
1577 if (rc)
1578 goto error;
1579
1580 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1581 PN533_CMD_DATAEXCH_DATA_MAXLEN +
1582 PN533_FRAME_TAIL_SIZE;
1583
1584 skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
1585 if (!skb_resp) {
1586 rc = -ENOMEM;
1587 goto error;
1588 }
1589
1590 in_frame = (struct pn533_frame *) skb_resp->data;
1591 out_frame = (struct pn533_frame *) skb->data;
1592
1593 arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL);
1594 if (!arg) {
1595 rc = -ENOMEM;
1596 goto free_skb_resp;
1597 }
1598
1599 arg->skb_resp = skb_resp;
1600 arg->skb_out = skb;
1601 arg->cb = cb;
1602 arg->cb_context = cb_context;
1603
1604 rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len,
1605 pn533_data_exchange_complete, arg,
1606 GFP_KERNEL);
1607 if (rc) {
1608 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1609 " perform data_exchange", rc);
1610 goto free_arg;
1611 }
1612
1613 return 0;
1614
1615 free_arg:
1616 kfree(arg);
1617 free_skb_resp:
1618 kfree_skb(skb_resp);
1619 error:
1620 kfree_skb(skb);
1621 return rc;
1622 }
1623
1624 static void pn533_wq_mi_recv(struct work_struct *work)
1625 {
1626 struct pn533 *dev = container_of(work, struct pn533, mi_work);
1627 struct sk_buff *skb_cmd;
1628 struct pn533_data_exchange_arg *arg = dev->cmd_complete_arg;
1629 struct pn533_frame *out_frame, *in_frame;
1630 struct sk_buff *skb_resp;
1631 int skb_resp_len;
1632 int rc;
1633
1634 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1635
1636 /* This is a zero payload size skb */
1637 skb_cmd = alloc_skb(PN533_CMD_DATAEXCH_HEAD_LEN + PN533_FRAME_TAIL_SIZE,
1638 GFP_KERNEL);
1639 if (skb_cmd == NULL)
1640 goto error_cmd;
1641
1642 skb_reserve(skb_cmd, PN533_CMD_DATAEXCH_HEAD_LEN);
1643
1644 rc = pn533_data_exchange_tx_frame(dev, skb_cmd);
1645 if (rc)
1646 goto error_frame;
1647
1648 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1649 PN533_CMD_DATAEXCH_DATA_MAXLEN +
1650 PN533_FRAME_TAIL_SIZE;
1651 skb_resp = alloc_skb(skb_resp_len, GFP_KERNEL);
1652 if (!skb_resp) {
1653 rc = -ENOMEM;
1654 goto error_frame;
1655 }
1656
1657 in_frame = (struct pn533_frame *) skb_resp->data;
1658 out_frame = (struct pn533_frame *) skb_cmd->data;
1659
1660 arg->skb_resp = skb_resp;
1661 arg->skb_out = skb_cmd;
1662
1663 rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
1664 skb_resp_len,
1665 pn533_data_exchange_complete,
1666 dev->cmd_complete_arg, GFP_KERNEL);
1667 if (!rc)
1668 return;
1669
1670 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1671 " perform data_exchange", rc);
1672
1673 kfree_skb(skb_resp);
1674
1675 error_frame:
1676 kfree_skb(skb_cmd);
1677
1678 error_cmd:
1679 pn533_send_ack(dev, GFP_KERNEL);
1680
1681 kfree(arg);
1682
1683 up(&dev->cmd_lock);
1684 }
1685
1686 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
1687 u8 cfgdata_len)
1688 {
1689 int rc;
1690 u8 *params;
1691
1692 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1693
1694 pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
1695
1696 params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
1697 params[0] = cfgitem;
1698 memcpy(&params[1], cfgdata, cfgdata_len);
1699 dev->out_frame->datalen += (1 + cfgdata_len);
1700
1701 pn533_tx_frame_finish(dev->out_frame);
1702
1703 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1704 dev->in_maxlen);
1705
1706 return rc;
1707 }
1708
1709 struct nfc_ops pn533_nfc_ops = {
1710 .dev_up = NULL,
1711 .dev_down = NULL,
1712 .dep_link_up = pn533_dep_link_up,
1713 .dep_link_down = pn533_dep_link_down,
1714 .start_poll = pn533_start_poll,
1715 .stop_poll = pn533_stop_poll,
1716 .activate_target = pn533_activate_target,
1717 .deactivate_target = pn533_deactivate_target,
1718 .data_exchange = pn533_data_exchange,
1719 };
1720
1721 static int pn533_probe(struct usb_interface *interface,
1722 const struct usb_device_id *id)
1723 {
1724 struct pn533_fw_version *fw_ver;
1725 struct pn533 *dev;
1726 struct usb_host_interface *iface_desc;
1727 struct usb_endpoint_descriptor *endpoint;
1728 struct pn533_config_max_retries max_retries;
1729 int in_endpoint = 0;
1730 int out_endpoint = 0;
1731 int rc = -ENOMEM;
1732 int i;
1733 u32 protocols;
1734
1735 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1736 if (!dev)
1737 return -ENOMEM;
1738
1739 dev->udev = usb_get_dev(interface_to_usbdev(interface));
1740 dev->interface = interface;
1741 sema_init(&dev->cmd_lock, 1);
1742
1743 iface_desc = interface->cur_altsetting;
1744 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1745 endpoint = &iface_desc->endpoint[i].desc;
1746
1747 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1748 dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize);
1749 in_endpoint = endpoint->bEndpointAddress;
1750 }
1751
1752 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) {
1753 dev->out_maxlen =
1754 le16_to_cpu(endpoint->wMaxPacketSize);
1755 out_endpoint = endpoint->bEndpointAddress;
1756 }
1757 }
1758
1759 if (!in_endpoint || !out_endpoint) {
1760 nfc_dev_err(&interface->dev, "Could not find bulk-in or"
1761 " bulk-out endpoint");
1762 rc = -ENODEV;
1763 goto error;
1764 }
1765
1766 dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
1767 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1768 dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
1769 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1770
1771 if (!dev->in_frame || !dev->out_frame ||
1772 !dev->in_urb || !dev->out_urb)
1773 goto error;
1774
1775 usb_fill_bulk_urb(dev->in_urb, dev->udev,
1776 usb_rcvbulkpipe(dev->udev, in_endpoint),
1777 NULL, 0, NULL, dev);
1778 usb_fill_bulk_urb(dev->out_urb, dev->udev,
1779 usb_sndbulkpipe(dev->udev, out_endpoint),
1780 NULL, 0,
1781 pn533_send_complete, dev);
1782
1783 INIT_WORK(&dev->cmd_work, pn533_wq_cmd_complete);
1784 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
1785 dev->wq = alloc_workqueue("pn533",
1786 WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
1787 1);
1788 if (dev->wq == NULL)
1789 goto error;
1790
1791 skb_queue_head_init(&dev->resp_q);
1792
1793 usb_set_intfdata(interface, dev);
1794
1795 pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
1796 pn533_tx_frame_finish(dev->out_frame);
1797
1798 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1799 dev->in_maxlen);
1800 if (rc)
1801 goto destroy_wq;
1802
1803 fw_ver = (struct pn533_fw_version *)
1804 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1805 nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
1806 " attached", fw_ver->ver, fw_ver->rev);
1807
1808 protocols = NFC_PROTO_JEWEL_MASK
1809 | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
1810 | NFC_PROTO_ISO14443_MASK
1811 | NFC_PROTO_NFC_DEP_MASK;
1812
1813 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
1814 PN533_CMD_DATAEXCH_HEAD_LEN,
1815 PN533_FRAME_TAIL_SIZE);
1816 if (!dev->nfc_dev)
1817 goto destroy_wq;
1818
1819 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
1820 nfc_set_drvdata(dev->nfc_dev, dev);
1821
1822 rc = nfc_register_device(dev->nfc_dev);
1823 if (rc)
1824 goto free_nfc_dev;
1825
1826 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
1827 max_retries.mx_rty_psl = 2;
1828 max_retries.mx_rty_passive_act = PN533_CONFIG_MAX_RETRIES_NO_RETRY;
1829
1830 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
1831 (u8 *) &max_retries, sizeof(max_retries));
1832
1833 if (rc) {
1834 nfc_dev_err(&dev->interface->dev, "Error on setting MAX_RETRIES"
1835 " config");
1836 goto free_nfc_dev;
1837 }
1838
1839 return 0;
1840
1841 free_nfc_dev:
1842 nfc_free_device(dev->nfc_dev);
1843 destroy_wq:
1844 destroy_workqueue(dev->wq);
1845 error:
1846 kfree(dev->in_frame);
1847 usb_free_urb(dev->in_urb);
1848 kfree(dev->out_frame);
1849 usb_free_urb(dev->out_urb);
1850 kfree(dev);
1851 return rc;
1852 }
1853
1854 static void pn533_disconnect(struct usb_interface *interface)
1855 {
1856 struct pn533 *dev;
1857
1858 dev = usb_get_intfdata(interface);
1859 usb_set_intfdata(interface, NULL);
1860
1861 nfc_unregister_device(dev->nfc_dev);
1862 nfc_free_device(dev->nfc_dev);
1863
1864 usb_kill_urb(dev->in_urb);
1865 usb_kill_urb(dev->out_urb);
1866
1867 destroy_workqueue(dev->wq);
1868
1869 skb_queue_purge(&dev->resp_q);
1870
1871 kfree(dev->in_frame);
1872 usb_free_urb(dev->in_urb);
1873 kfree(dev->out_frame);
1874 usb_free_urb(dev->out_urb);
1875 kfree(dev);
1876
1877 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
1878 }
1879
1880 static struct usb_driver pn533_driver = {
1881 .name = "pn533",
1882 .probe = pn533_probe,
1883 .disconnect = pn533_disconnect,
1884 .id_table = pn533_table,
1885 };
1886
1887 module_usb_driver(pn533_driver);
1888
1889 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
1890 " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
1891 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
1892 MODULE_VERSION(VERSION);
1893 MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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