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Merge branch 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild
[GitHub/LineageOS/android_kernel_samsung_universal7580.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 tasklet_struct tasklet;
270 struct pn533_frame *tklt_in_frame;
271 int tklt_in_error;
272
273 pn533_cmd_complete_t cmd_complete;
274 void *cmd_complete_arg;
275 struct semaphore cmd_lock;
276 u8 cmd;
277
278 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
279 u8 poll_mod_count;
280 u8 poll_mod_curr;
281 u32 poll_protocols;
282
283 u8 tgt_available_prots;
284 u8 tgt_active_prot;
285 };
286
287 struct pn533_frame {
288 u8 preamble;
289 __be16 start_frame;
290 u8 datalen;
291 u8 datalen_checksum;
292 u8 data[];
293 } __packed;
294
295 /* The rule: value + checksum = 0 */
296 static inline u8 pn533_checksum(u8 value)
297 {
298 return ~value + 1;
299 }
300
301 /* The rule: sum(data elements) + checksum = 0 */
302 static u8 pn533_data_checksum(u8 *data, int datalen)
303 {
304 u8 sum = 0;
305 int i;
306
307 for (i = 0; i < datalen; i++)
308 sum += data[i];
309
310 return pn533_checksum(sum);
311 }
312
313 /**
314 * pn533_tx_frame_ack - create a ack frame
315 * @frame: The frame to be set as ack
316 *
317 * Ack is different type of standard frame. As a standard frame, it has
318 * preamble and start_frame. However the checksum of this frame must fail,
319 * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test
320 * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack.
321 * After datalen_checksum field, the postamble is placed.
322 */
323 static void pn533_tx_frame_ack(struct pn533_frame *frame)
324 {
325 frame->preamble = 0;
326 frame->start_frame = cpu_to_be16(PN533_SOF);
327 frame->datalen = 0;
328 frame->datalen_checksum = 0xFF;
329 /* data[0] is used as postamble */
330 frame->data[0] = 0;
331 }
332
333 static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd)
334 {
335 frame->preamble = 0;
336 frame->start_frame = cpu_to_be16(PN533_SOF);
337 PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT;
338 PN533_FRAME_CMD(frame) = cmd;
339 frame->datalen = 2;
340 }
341
342 static void pn533_tx_frame_finish(struct pn533_frame *frame)
343 {
344 frame->datalen_checksum = pn533_checksum(frame->datalen);
345
346 PN533_FRAME_CHECKSUM(frame) =
347 pn533_data_checksum(frame->data, frame->datalen);
348
349 PN533_FRAME_POSTAMBLE(frame) = 0;
350 }
351
352 static bool pn533_rx_frame_is_valid(struct pn533_frame *frame)
353 {
354 u8 checksum;
355
356 if (frame->start_frame != cpu_to_be16(PN533_SOF))
357 return false;
358
359 checksum = pn533_checksum(frame->datalen);
360 if (checksum != frame->datalen_checksum)
361 return false;
362
363 checksum = pn533_data_checksum(frame->data, frame->datalen);
364 if (checksum != PN533_FRAME_CHECKSUM(frame))
365 return false;
366
367 return true;
368 }
369
370 static bool pn533_rx_frame_is_ack(struct pn533_frame *frame)
371 {
372 if (frame->start_frame != cpu_to_be16(PN533_SOF))
373 return false;
374
375 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
376 return false;
377
378 return true;
379 }
380
381 static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
382 {
383 return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
384 }
385
386 static void pn533_tasklet_cmd_complete(unsigned long arg)
387 {
388 struct pn533 *dev = (struct pn533 *) arg;
389 struct pn533_frame *in_frame = dev->tklt_in_frame;
390 int rc;
391
392 if (dev->tklt_in_error)
393 rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
394 dev->tklt_in_error);
395 else
396 rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
397 PN533_FRAME_CMD_PARAMS_PTR(in_frame),
398 PN533_FRAME_CMD_PARAMS_LEN(in_frame));
399
400 if (rc != -EINPROGRESS)
401 up(&dev->cmd_lock);
402 }
403
404 static void pn533_recv_response(struct urb *urb)
405 {
406 struct pn533 *dev = urb->context;
407 struct pn533_frame *in_frame;
408
409 dev->tklt_in_frame = NULL;
410
411 switch (urb->status) {
412 case 0:
413 /* success */
414 break;
415 case -ECONNRESET:
416 case -ENOENT:
417 case -ESHUTDOWN:
418 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
419 " status: %d", urb->status);
420 dev->tklt_in_error = urb->status;
421 goto sched_tasklet;
422 default:
423 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
424 " %d", urb->status);
425 dev->tklt_in_error = urb->status;
426 goto sched_tasklet;
427 }
428
429 in_frame = dev->in_urb->transfer_buffer;
430
431 if (!pn533_rx_frame_is_valid(in_frame)) {
432 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
433 dev->tklt_in_error = -EIO;
434 goto sched_tasklet;
435 }
436
437 if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
438 nfc_dev_err(&dev->interface->dev, "The received frame is not "
439 "response to the last command");
440 dev->tklt_in_error = -EIO;
441 goto sched_tasklet;
442 }
443
444 nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
445 dev->tklt_in_error = 0;
446 dev->tklt_in_frame = in_frame;
447
448 sched_tasklet:
449 tasklet_schedule(&dev->tasklet);
450 }
451
452 static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
453 {
454 dev->in_urb->complete = pn533_recv_response;
455
456 return usb_submit_urb(dev->in_urb, flags);
457 }
458
459 static void pn533_recv_ack(struct urb *urb)
460 {
461 struct pn533 *dev = urb->context;
462 struct pn533_frame *in_frame;
463 int rc;
464
465 switch (urb->status) {
466 case 0:
467 /* success */
468 break;
469 case -ECONNRESET:
470 case -ENOENT:
471 case -ESHUTDOWN:
472 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
473 " status: %d", urb->status);
474 dev->tklt_in_error = urb->status;
475 goto sched_tasklet;
476 default:
477 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
478 " %d", urb->status);
479 dev->tklt_in_error = urb->status;
480 goto sched_tasklet;
481 }
482
483 in_frame = dev->in_urb->transfer_buffer;
484
485 if (!pn533_rx_frame_is_ack(in_frame)) {
486 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
487 dev->tklt_in_error = -EIO;
488 goto sched_tasklet;
489 }
490
491 nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
492
493 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
494 if (rc) {
495 nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with"
496 " result %d", rc);
497 dev->tklt_in_error = rc;
498 goto sched_tasklet;
499 }
500
501 return;
502
503 sched_tasklet:
504 dev->tklt_in_frame = NULL;
505 tasklet_schedule(&dev->tasklet);
506 }
507
508 static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
509 {
510 dev->in_urb->complete = pn533_recv_ack;
511
512 return usb_submit_urb(dev->in_urb, flags);
513 }
514
515 static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
516 {
517 int rc;
518
519 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
520
521 pn533_tx_frame_ack(dev->out_frame);
522
523 dev->out_urb->transfer_buffer = dev->out_frame;
524 dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
525 rc = usb_submit_urb(dev->out_urb, flags);
526
527 return rc;
528 }
529
530 static int __pn533_send_cmd_frame_async(struct pn533 *dev,
531 struct pn533_frame *out_frame,
532 struct pn533_frame *in_frame,
533 int in_frame_len,
534 pn533_cmd_complete_t cmd_complete,
535 void *arg, gfp_t flags)
536 {
537 int rc;
538
539 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
540 PN533_FRAME_CMD(out_frame));
541
542 dev->cmd = PN533_FRAME_CMD(out_frame);
543 dev->cmd_complete = cmd_complete;
544 dev->cmd_complete_arg = arg;
545
546 dev->out_urb->transfer_buffer = out_frame;
547 dev->out_urb->transfer_buffer_length =
548 PN533_FRAME_SIZE(out_frame);
549
550 dev->in_urb->transfer_buffer = in_frame;
551 dev->in_urb->transfer_buffer_length = in_frame_len;
552
553 rc = usb_submit_urb(dev->out_urb, flags);
554 if (rc)
555 return rc;
556
557 rc = pn533_submit_urb_for_ack(dev, flags);
558 if (rc)
559 goto error;
560
561 return 0;
562
563 error:
564 usb_unlink_urb(dev->out_urb);
565 return rc;
566 }
567
568 static int pn533_send_cmd_frame_async(struct pn533 *dev,
569 struct pn533_frame *out_frame,
570 struct pn533_frame *in_frame,
571 int in_frame_len,
572 pn533_cmd_complete_t cmd_complete,
573 void *arg, gfp_t flags)
574 {
575 int rc;
576
577 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
578
579 if (down_trylock(&dev->cmd_lock))
580 return -EBUSY;
581
582 rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
583 in_frame_len, cmd_complete, arg, flags);
584 if (rc)
585 goto error;
586
587 return 0;
588 error:
589 up(&dev->cmd_lock);
590 return rc;
591 }
592
593 struct pn533_sync_cmd_response {
594 int rc;
595 struct completion done;
596 };
597
598 static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg,
599 u8 *params, int params_len)
600 {
601 struct pn533_sync_cmd_response *arg = _arg;
602
603 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
604
605 arg->rc = 0;
606
607 if (params_len < 0) /* error */
608 arg->rc = params_len;
609
610 complete(&arg->done);
611
612 return 0;
613 }
614
615 static int pn533_send_cmd_frame_sync(struct pn533 *dev,
616 struct pn533_frame *out_frame,
617 struct pn533_frame *in_frame,
618 int in_frame_len)
619 {
620 int rc;
621 struct pn533_sync_cmd_response arg;
622
623 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
624
625 init_completion(&arg.done);
626
627 rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len,
628 pn533_sync_cmd_complete, &arg, GFP_KERNEL);
629 if (rc)
630 return rc;
631
632 wait_for_completion(&arg.done);
633
634 return arg.rc;
635 }
636
637 static void pn533_send_complete(struct urb *urb)
638 {
639 struct pn533 *dev = urb->context;
640
641 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
642
643 switch (urb->status) {
644 case 0:
645 /* success */
646 break;
647 case -ECONNRESET:
648 case -ENOENT:
649 case -ESHUTDOWN:
650 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
651 " status: %d", urb->status);
652 break;
653 default:
654 nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:"
655 " %d", urb->status);
656 }
657 }
658
659 struct pn533_target_type_a {
660 __be16 sens_res;
661 u8 sel_res;
662 u8 nfcid_len;
663 u8 nfcid_data[];
664 } __packed;
665
666
667 #define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
668 #define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
669 #define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
670
671 #define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
672 #define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
673
674 #define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
675 #define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
676
677 #define PN533_TYPE_A_SEL_PROT_MIFARE 0
678 #define PN533_TYPE_A_SEL_PROT_ISO14443 1
679 #define PN533_TYPE_A_SEL_PROT_DEP 2
680 #define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
681
682 static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
683 int target_data_len)
684 {
685 u8 ssd;
686 u8 platconf;
687
688 if (target_data_len < sizeof(struct pn533_target_type_a))
689 return false;
690
691 /* The lenght check of nfcid[] and ats[] are not being performed because
692 the values are not being used */
693
694 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
695 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
696 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
697
698 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
699 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
700 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
701 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
702 return false;
703
704 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
705 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
706 return false;
707
708 return true;
709 }
710
711 static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
712 int tgt_data_len)
713 {
714 struct pn533_target_type_a *tgt_type_a;
715
716 tgt_type_a = (struct pn533_target_type_a *) tgt_data;
717
718 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
719 return -EPROTO;
720
721 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
722 case PN533_TYPE_A_SEL_PROT_MIFARE:
723 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
724 break;
725 case PN533_TYPE_A_SEL_PROT_ISO14443:
726 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
727 break;
728 case PN533_TYPE_A_SEL_PROT_DEP:
729 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
730 break;
731 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
732 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
733 NFC_PROTO_NFC_DEP_MASK;
734 break;
735 }
736
737 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
738 nfc_tgt->sel_res = tgt_type_a->sel_res;
739 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
740 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
741
742 return 0;
743 }
744
745 struct pn533_target_felica {
746 u8 pol_res;
747 u8 opcode;
748 u8 nfcid2[8];
749 u8 pad[8];
750 /* optional */
751 u8 syst_code[];
752 } __packed;
753
754 #define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
755 #define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
756
757 static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
758 int target_data_len)
759 {
760 if (target_data_len < sizeof(struct pn533_target_felica))
761 return false;
762
763 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
764 return false;
765
766 return true;
767 }
768
769 static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
770 int tgt_data_len)
771 {
772 struct pn533_target_felica *tgt_felica;
773
774 tgt_felica = (struct pn533_target_felica *) tgt_data;
775
776 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
777 return -EPROTO;
778
779 if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 &&
780 tgt_felica->nfcid2[1] ==
781 PN533_FELICA_SENSF_NFCID2_DEP_B2)
782 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
783 else
784 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
785
786 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
787 nfc_tgt->sensf_res_len = 9;
788
789 return 0;
790 }
791
792 struct pn533_target_jewel {
793 __be16 sens_res;
794 u8 jewelid[4];
795 } __packed;
796
797 static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
798 int target_data_len)
799 {
800 u8 ssd;
801 u8 platconf;
802
803 if (target_data_len < sizeof(struct pn533_target_jewel))
804 return false;
805
806 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
807 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
808 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
809
810 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
811 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
812 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
813 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
814 return false;
815
816 return true;
817 }
818
819 static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
820 int tgt_data_len)
821 {
822 struct pn533_target_jewel *tgt_jewel;
823
824 tgt_jewel = (struct pn533_target_jewel *) tgt_data;
825
826 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
827 return -EPROTO;
828
829 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
830 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
831 nfc_tgt->nfcid1_len = 4;
832 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
833
834 return 0;
835 }
836
837 struct pn533_type_b_prot_info {
838 u8 bitrate;
839 u8 fsci_type;
840 u8 fwi_adc_fo;
841 } __packed;
842
843 #define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
844 #define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
845 #define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
846
847 struct pn533_type_b_sens_res {
848 u8 opcode;
849 u8 nfcid[4];
850 u8 appdata[4];
851 struct pn533_type_b_prot_info prot_info;
852 } __packed;
853
854 #define PN533_TYPE_B_OPC_SENSB_RES 0x50
855
856 struct pn533_target_type_b {
857 struct pn533_type_b_sens_res sensb_res;
858 u8 attrib_res_len;
859 u8 attrib_res[];
860 } __packed;
861
862 static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
863 int target_data_len)
864 {
865 if (target_data_len < sizeof(struct pn533_target_type_b))
866 return false;
867
868 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
869 return false;
870
871 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
872 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
873 return false;
874
875 return true;
876 }
877
878 static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
879 int tgt_data_len)
880 {
881 struct pn533_target_type_b *tgt_type_b;
882
883 tgt_type_b = (struct pn533_target_type_b *) tgt_data;
884
885 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
886 return -EPROTO;
887
888 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
889
890 return 0;
891 }
892
893 struct pn533_poll_response {
894 u8 nbtg;
895 u8 tg;
896 u8 target_data[];
897 } __packed;
898
899 static int pn533_target_found(struct pn533 *dev,
900 struct pn533_poll_response *resp, int resp_len)
901 {
902 int target_data_len;
903 struct nfc_target nfc_tgt;
904 int rc;
905
906 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
907 dev->poll_mod_curr);
908
909 if (resp->tg != 1)
910 return -EPROTO;
911
912 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
913
914 target_data_len = resp_len - sizeof(struct pn533_poll_response);
915
916 switch (dev->poll_mod_curr) {
917 case PN533_POLL_MOD_106KBPS_A:
918 rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
919 target_data_len);
920 break;
921 case PN533_POLL_MOD_212KBPS_FELICA:
922 case PN533_POLL_MOD_424KBPS_FELICA:
923 rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
924 target_data_len);
925 break;
926 case PN533_POLL_MOD_106KBPS_JEWEL:
927 rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
928 target_data_len);
929 break;
930 case PN533_POLL_MOD_847KBPS_B:
931 rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
932 target_data_len);
933 break;
934 default:
935 nfc_dev_err(&dev->interface->dev, "Unknown current poll"
936 " modulation");
937 return -EPROTO;
938 }
939
940 if (rc)
941 return rc;
942
943 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
944 nfc_dev_dbg(&dev->interface->dev, "The target found does not"
945 " have the desired protocol");
946 return -EAGAIN;
947 }
948
949 nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
950 "0x%x", nfc_tgt.supported_protocols);
951
952 dev->tgt_available_prots = nfc_tgt.supported_protocols;
953
954 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
955
956 return 0;
957 }
958
959 static void pn533_poll_reset_mod_list(struct pn533 *dev)
960 {
961 dev->poll_mod_count = 0;
962 }
963
964 static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
965 {
966 dev->poll_mod_active[dev->poll_mod_count] =
967 (struct pn533_poll_modulations *) &poll_mod[mod_index];
968 dev->poll_mod_count++;
969 }
970
971 static void pn533_poll_create_mod_list(struct pn533 *dev, u32 protocols)
972 {
973 pn533_poll_reset_mod_list(dev);
974
975 if (protocols & NFC_PROTO_MIFARE_MASK
976 || protocols & NFC_PROTO_ISO14443_MASK
977 || protocols & NFC_PROTO_NFC_DEP_MASK)
978 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
979
980 if (protocols & NFC_PROTO_FELICA_MASK
981 || protocols & NFC_PROTO_NFC_DEP_MASK) {
982 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
983 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
984 }
985
986 if (protocols & NFC_PROTO_JEWEL_MASK)
987 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
988
989 if (protocols & NFC_PROTO_ISO14443_MASK)
990 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
991 }
992
993 static void pn533_start_poll_frame(struct pn533_frame *frame,
994 struct pn533_poll_modulations *mod)
995 {
996
997 pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
998
999 memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
1000 frame->datalen += mod->len;
1001
1002 pn533_tx_frame_finish(frame);
1003 }
1004
1005 static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
1006 u8 *params, int params_len)
1007 {
1008 struct pn533_poll_response *resp;
1009 struct pn533_poll_modulations *next_mod;
1010 int rc;
1011
1012 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1013
1014 if (params_len == -ENOENT) {
1015 nfc_dev_dbg(&dev->interface->dev, "Polling operation has been"
1016 " stopped");
1017 goto stop_poll;
1018 }
1019
1020 if (params_len < 0) {
1021 nfc_dev_err(&dev->interface->dev, "Error %d when running poll",
1022 params_len);
1023 goto stop_poll;
1024 }
1025
1026 resp = (struct pn533_poll_response *) params;
1027 if (resp->nbtg) {
1028 rc = pn533_target_found(dev, resp, params_len);
1029
1030 /* We must stop the poll after a valid target found */
1031 if (rc == 0)
1032 goto stop_poll;
1033
1034 if (rc != -EAGAIN)
1035 nfc_dev_err(&dev->interface->dev, "The target found is"
1036 " not valid - continuing to poll");
1037 }
1038
1039 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1040
1041 next_mod = dev->poll_mod_active[dev->poll_mod_curr];
1042
1043 nfc_dev_dbg(&dev->interface->dev, "Polling next modulation (0x%x)",
1044 dev->poll_mod_curr);
1045
1046 pn533_start_poll_frame(dev->out_frame, next_mod);
1047
1048 /* Don't need to down the semaphore again */
1049 rc = __pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1050 dev->in_maxlen, pn533_start_poll_complete,
1051 NULL, GFP_ATOMIC);
1052
1053 if (rc == -EPERM) {
1054 nfc_dev_dbg(&dev->interface->dev, "Cannot poll next modulation"
1055 " because poll has been stopped");
1056 goto stop_poll;
1057 }
1058
1059 if (rc) {
1060 nfc_dev_err(&dev->interface->dev, "Error %d when trying to poll"
1061 " next modulation", rc);
1062 goto stop_poll;
1063 }
1064
1065 /* Inform caller function to do not up the semaphore */
1066 return -EINPROGRESS;
1067
1068 stop_poll:
1069 pn533_poll_reset_mod_list(dev);
1070 dev->poll_protocols = 0;
1071 return 0;
1072 }
1073
1074 static int pn533_start_poll(struct nfc_dev *nfc_dev, u32 protocols)
1075 {
1076 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1077 struct pn533_poll_modulations *start_mod;
1078 int rc;
1079
1080 nfc_dev_dbg(&dev->interface->dev, "%s - protocols=0x%x", __func__,
1081 protocols);
1082
1083 if (dev->poll_mod_count) {
1084 nfc_dev_err(&dev->interface->dev, "Polling operation already"
1085 " active");
1086 return -EBUSY;
1087 }
1088
1089 if (dev->tgt_active_prot) {
1090 nfc_dev_err(&dev->interface->dev, "Cannot poll with a target"
1091 " already activated");
1092 return -EBUSY;
1093 }
1094
1095 pn533_poll_create_mod_list(dev, protocols);
1096
1097 if (!dev->poll_mod_count) {
1098 nfc_dev_err(&dev->interface->dev, "No valid protocols"
1099 " specified");
1100 rc = -EINVAL;
1101 goto error;
1102 }
1103
1104 nfc_dev_dbg(&dev->interface->dev, "It will poll %d modulations types",
1105 dev->poll_mod_count);
1106
1107 dev->poll_mod_curr = 0;
1108 start_mod = dev->poll_mod_active[dev->poll_mod_curr];
1109
1110 pn533_start_poll_frame(dev->out_frame, start_mod);
1111
1112 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1113 dev->in_maxlen, pn533_start_poll_complete,
1114 NULL, GFP_KERNEL);
1115
1116 if (rc) {
1117 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1118 " start poll", rc);
1119 goto error;
1120 }
1121
1122 dev->poll_protocols = protocols;
1123
1124 return 0;
1125
1126 error:
1127 pn533_poll_reset_mod_list(dev);
1128 return rc;
1129 }
1130
1131 static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1132 {
1133 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1134
1135 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1136
1137 if (!dev->poll_mod_count) {
1138 nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
1139 " running");
1140 return;
1141 }
1142
1143 /* An ack will cancel the last issued command (poll) */
1144 pn533_send_ack(dev, GFP_KERNEL);
1145
1146 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1147 usb_kill_urb(dev->in_urb);
1148 }
1149
1150 static int pn533_activate_target_nfcdep(struct pn533 *dev)
1151 {
1152 struct pn533_cmd_activate_param param;
1153 struct pn533_cmd_activate_response *resp;
1154 u16 gt_len;
1155 int rc;
1156
1157 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1158
1159 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
1160
1161 param.tg = 1;
1162 param.next = 0;
1163 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &param,
1164 sizeof(struct pn533_cmd_activate_param));
1165 dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
1166
1167 pn533_tx_frame_finish(dev->out_frame);
1168
1169 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1170 dev->in_maxlen);
1171 if (rc)
1172 return rc;
1173
1174 resp = (struct pn533_cmd_activate_response *)
1175 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1176 rc = resp->status & PN533_CMD_RET_MASK;
1177 if (rc != PN533_CMD_RET_SUCCESS)
1178 return -EIO;
1179
1180 /* ATR_RES general bytes are located at offset 16 */
1181 gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
1182 rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
1183
1184 return rc;
1185 }
1186
1187 static int pn533_activate_target(struct nfc_dev *nfc_dev, u32 target_idx,
1188 u32 protocol)
1189 {
1190 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1191 int rc;
1192
1193 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1194 protocol);
1195
1196 if (dev->poll_mod_count) {
1197 nfc_dev_err(&dev->interface->dev, "Cannot activate while"
1198 " polling");
1199 return -EBUSY;
1200 }
1201
1202 if (dev->tgt_active_prot) {
1203 nfc_dev_err(&dev->interface->dev, "There is already an active"
1204 " target");
1205 return -EBUSY;
1206 }
1207
1208 if (!dev->tgt_available_prots) {
1209 nfc_dev_err(&dev->interface->dev, "There is no available target"
1210 " to activate");
1211 return -EINVAL;
1212 }
1213
1214 if (!(dev->tgt_available_prots & (1 << protocol))) {
1215 nfc_dev_err(&dev->interface->dev, "The target does not support"
1216 " the requested protocol %u", protocol);
1217 return -EINVAL;
1218 }
1219
1220 if (protocol == NFC_PROTO_NFC_DEP) {
1221 rc = pn533_activate_target_nfcdep(dev);
1222 if (rc) {
1223 nfc_dev_err(&dev->interface->dev, "Error %d when"
1224 " activating target with"
1225 " NFC_DEP protocol", rc);
1226 return rc;
1227 }
1228 }
1229
1230 dev->tgt_active_prot = protocol;
1231 dev->tgt_available_prots = 0;
1232
1233 return 0;
1234 }
1235
1236 static void pn533_deactivate_target(struct nfc_dev *nfc_dev, u32 target_idx)
1237 {
1238 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1239 u8 tg;
1240 u8 status;
1241 int rc;
1242
1243 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1244
1245 if (!dev->tgt_active_prot) {
1246 nfc_dev_err(&dev->interface->dev, "There is no active target");
1247 return;
1248 }
1249
1250 dev->tgt_active_prot = 0;
1251
1252 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
1253
1254 tg = 1;
1255 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
1256 dev->out_frame->datalen += sizeof(u8);
1257
1258 pn533_tx_frame_finish(dev->out_frame);
1259
1260 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1261 dev->in_maxlen);
1262 if (rc) {
1263 nfc_dev_err(&dev->interface->dev, "Error when sending release"
1264 " command to the controller");
1265 return;
1266 }
1267
1268 status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
1269 rc = status & PN533_CMD_RET_MASK;
1270 if (rc != PN533_CMD_RET_SUCCESS)
1271 nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
1272 " the target", rc);
1273
1274 return;
1275 }
1276
1277
1278 static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1279 u8 *params, int params_len)
1280 {
1281 struct pn533_cmd_jump_dep *cmd;
1282 struct pn533_cmd_jump_dep_response *resp;
1283 struct nfc_target nfc_target;
1284 u8 target_gt_len;
1285 int rc;
1286
1287 if (params_len == -ENOENT) {
1288 nfc_dev_dbg(&dev->interface->dev, "");
1289 return 0;
1290 }
1291
1292 if (params_len < 0) {
1293 nfc_dev_err(&dev->interface->dev,
1294 "Error %d when bringing DEP link up",
1295 params_len);
1296 return 0;
1297 }
1298
1299 if (dev->tgt_available_prots &&
1300 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1301 nfc_dev_err(&dev->interface->dev,
1302 "The target does not support DEP");
1303 return -EINVAL;
1304 }
1305
1306 resp = (struct pn533_cmd_jump_dep_response *) params;
1307 cmd = (struct pn533_cmd_jump_dep *) arg;
1308 rc = resp->status & PN533_CMD_RET_MASK;
1309 if (rc != PN533_CMD_RET_SUCCESS) {
1310 nfc_dev_err(&dev->interface->dev,
1311 "Bringing DEP link up failed %d", rc);
1312 return 0;
1313 }
1314
1315 if (!dev->tgt_available_prots) {
1316 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1317
1318 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1319 nfc_target.nfcid1_len = 10;
1320 memcpy(nfc_target.nfcid1, resp->nfcid3t, nfc_target.nfcid1_len);
1321 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1322 if (rc)
1323 return 0;
1324
1325 dev->tgt_available_prots = 0;
1326 }
1327
1328 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1329
1330 /* ATR_RES general bytes are located at offset 17 */
1331 target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17;
1332 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1333 resp->gt, target_gt_len);
1334 if (rc == 0)
1335 rc = nfc_dep_link_is_up(dev->nfc_dev,
1336 dev->nfc_dev->targets[0].idx,
1337 !cmd->active, NFC_RF_INITIATOR);
1338
1339 return 0;
1340 }
1341
1342 static int pn533_dep_link_up(struct nfc_dev *nfc_dev, int target_idx,
1343 u8 comm_mode, u8* gb, size_t gb_len)
1344 {
1345 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1346 struct pn533_cmd_jump_dep *cmd;
1347 u8 cmd_len;
1348 int rc;
1349
1350 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1351
1352 if (dev->poll_mod_count) {
1353 nfc_dev_err(&dev->interface->dev,
1354 "Cannot bring the DEP link up while polling");
1355 return -EBUSY;
1356 }
1357
1358 if (dev->tgt_active_prot) {
1359 nfc_dev_err(&dev->interface->dev,
1360 "There is already an active target");
1361 return -EBUSY;
1362 }
1363
1364 cmd_len = sizeof(struct pn533_cmd_jump_dep) + gb_len;
1365 cmd = kzalloc(cmd_len, GFP_KERNEL);
1366 if (cmd == NULL)
1367 return -ENOMEM;
1368
1369 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
1370
1371 cmd->active = !comm_mode;
1372 cmd->baud = 0;
1373 if (gb != NULL && gb_len > 0) {
1374 cmd->next = 4; /* We have some Gi */
1375 memcpy(cmd->gt, gb, gb_len);
1376 } else {
1377 cmd->next = 0;
1378 }
1379
1380 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len);
1381 dev->out_frame->datalen += cmd_len;
1382
1383 pn533_tx_frame_finish(dev->out_frame);
1384
1385 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1386 dev->in_maxlen, pn533_in_dep_link_up_complete,
1387 cmd, GFP_KERNEL);
1388 if (rc)
1389 goto out;
1390
1391
1392 out:
1393 kfree(cmd);
1394
1395 return rc;
1396 }
1397
1398 static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1399 {
1400 pn533_deactivate_target(nfc_dev, 0);
1401
1402 return 0;
1403 }
1404
1405 #define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3)
1406 #define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1407
1408 static int pn533_data_exchange_tx_frame(struct pn533 *dev, struct sk_buff *skb)
1409 {
1410 int payload_len = skb->len;
1411 struct pn533_frame *out_frame;
1412 u8 tg;
1413
1414 nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__,
1415 payload_len);
1416
1417 if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
1418 /* TODO: Implement support to multi-part data exchange */
1419 nfc_dev_err(&dev->interface->dev, "Data length greater than the"
1420 " max allowed: %d",
1421 PN533_CMD_DATAEXCH_DATA_MAXLEN);
1422 return -ENOSYS;
1423 }
1424
1425 skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN);
1426 out_frame = (struct pn533_frame *) skb->data;
1427
1428 pn533_tx_frame_init(out_frame, PN533_CMD_IN_DATA_EXCHANGE);
1429
1430 tg = 1;
1431 memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame), &tg, sizeof(u8));
1432 out_frame->datalen += sizeof(u8);
1433
1434 /* The data is already in the out_frame, just update the datalen */
1435 out_frame->datalen += payload_len;
1436
1437 pn533_tx_frame_finish(out_frame);
1438 skb_put(skb, PN533_FRAME_TAIL_SIZE);
1439
1440 return 0;
1441 }
1442
1443 struct pn533_data_exchange_arg {
1444 struct sk_buff *skb_resp;
1445 struct sk_buff *skb_out;
1446 data_exchange_cb_t cb;
1447 void *cb_context;
1448 };
1449
1450 static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
1451 u8 *params, int params_len)
1452 {
1453 struct pn533_data_exchange_arg *arg = _arg;
1454 struct sk_buff *skb_resp = arg->skb_resp;
1455 struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
1456 int err = 0;
1457 u8 status;
1458 u8 cmd_ret;
1459
1460 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1461
1462 dev_kfree_skb_irq(arg->skb_out);
1463
1464 if (params_len < 0) { /* error */
1465 err = params_len;
1466 goto error;
1467 }
1468
1469 skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
1470
1471 status = params[0];
1472
1473 cmd_ret = status & PN533_CMD_RET_MASK;
1474 if (cmd_ret != PN533_CMD_RET_SUCCESS) {
1475 nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when"
1476 " exchanging data", cmd_ret);
1477 err = -EIO;
1478 goto error;
1479 }
1480
1481 if (status & PN533_CMD_MI_MASK) {
1482 /* TODO: Implement support to multi-part data exchange */
1483 nfc_dev_err(&dev->interface->dev, "Multi-part message not yet"
1484 " supported");
1485 /* Prevent the other messages from controller */
1486 pn533_send_ack(dev, GFP_ATOMIC);
1487 err = -ENOSYS;
1488 goto error;
1489 }
1490
1491 skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
1492 skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
1493
1494 arg->cb(arg->cb_context, skb_resp, 0);
1495 kfree(arg);
1496 return 0;
1497
1498 error:
1499 dev_kfree_skb_irq(skb_resp);
1500 arg->cb(arg->cb_context, NULL, err);
1501 kfree(arg);
1502 return 0;
1503 }
1504
1505 static int pn533_data_exchange(struct nfc_dev *nfc_dev, u32 target_idx,
1506 struct sk_buff *skb,
1507 data_exchange_cb_t cb,
1508 void *cb_context)
1509 {
1510 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1511 struct pn533_frame *out_frame, *in_frame;
1512 struct pn533_data_exchange_arg *arg;
1513 struct sk_buff *skb_resp;
1514 int skb_resp_len;
1515 int rc;
1516
1517 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1518
1519 if (!dev->tgt_active_prot) {
1520 nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
1521 " there is no active target");
1522 rc = -EINVAL;
1523 goto error;
1524 }
1525
1526 rc = pn533_data_exchange_tx_frame(dev, skb);
1527 if (rc)
1528 goto error;
1529
1530 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1531 PN533_CMD_DATAEXCH_DATA_MAXLEN +
1532 PN533_FRAME_TAIL_SIZE;
1533
1534 skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
1535 if (!skb_resp) {
1536 rc = -ENOMEM;
1537 goto error;
1538 }
1539
1540 in_frame = (struct pn533_frame *) skb_resp->data;
1541 out_frame = (struct pn533_frame *) skb->data;
1542
1543 arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL);
1544 if (!arg) {
1545 rc = -ENOMEM;
1546 goto free_skb_resp;
1547 }
1548
1549 arg->skb_resp = skb_resp;
1550 arg->skb_out = skb;
1551 arg->cb = cb;
1552 arg->cb_context = cb_context;
1553
1554 rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len,
1555 pn533_data_exchange_complete, arg,
1556 GFP_KERNEL);
1557 if (rc) {
1558 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1559 " perform data_exchange", rc);
1560 goto free_arg;
1561 }
1562
1563 return 0;
1564
1565 free_arg:
1566 kfree(arg);
1567 free_skb_resp:
1568 kfree_skb(skb_resp);
1569 error:
1570 kfree_skb(skb);
1571 return rc;
1572 }
1573
1574 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
1575 u8 cfgdata_len)
1576 {
1577 int rc;
1578 u8 *params;
1579
1580 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1581
1582 pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
1583
1584 params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
1585 params[0] = cfgitem;
1586 memcpy(&params[1], cfgdata, cfgdata_len);
1587 dev->out_frame->datalen += (1 + cfgdata_len);
1588
1589 pn533_tx_frame_finish(dev->out_frame);
1590
1591 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1592 dev->in_maxlen);
1593
1594 return rc;
1595 }
1596
1597 struct nfc_ops pn533_nfc_ops = {
1598 .dev_up = NULL,
1599 .dev_down = NULL,
1600 .dep_link_up = pn533_dep_link_up,
1601 .dep_link_down = pn533_dep_link_down,
1602 .start_poll = pn533_start_poll,
1603 .stop_poll = pn533_stop_poll,
1604 .activate_target = pn533_activate_target,
1605 .deactivate_target = pn533_deactivate_target,
1606 .data_exchange = pn533_data_exchange,
1607 };
1608
1609 static int pn533_probe(struct usb_interface *interface,
1610 const struct usb_device_id *id)
1611 {
1612 struct pn533_fw_version *fw_ver;
1613 struct pn533 *dev;
1614 struct usb_host_interface *iface_desc;
1615 struct usb_endpoint_descriptor *endpoint;
1616 struct pn533_config_max_retries max_retries;
1617 int in_endpoint = 0;
1618 int out_endpoint = 0;
1619 int rc = -ENOMEM;
1620 int i;
1621 u32 protocols;
1622
1623 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1624 if (!dev)
1625 return -ENOMEM;
1626
1627 dev->udev = usb_get_dev(interface_to_usbdev(interface));
1628 dev->interface = interface;
1629 sema_init(&dev->cmd_lock, 1);
1630
1631 iface_desc = interface->cur_altsetting;
1632 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1633 endpoint = &iface_desc->endpoint[i].desc;
1634
1635 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1636 dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize);
1637 in_endpoint = endpoint->bEndpointAddress;
1638 }
1639
1640 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) {
1641 dev->out_maxlen =
1642 le16_to_cpu(endpoint->wMaxPacketSize);
1643 out_endpoint = endpoint->bEndpointAddress;
1644 }
1645 }
1646
1647 if (!in_endpoint || !out_endpoint) {
1648 nfc_dev_err(&interface->dev, "Could not find bulk-in or"
1649 " bulk-out endpoint");
1650 rc = -ENODEV;
1651 goto error;
1652 }
1653
1654 dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
1655 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1656 dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
1657 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1658
1659 if (!dev->in_frame || !dev->out_frame ||
1660 !dev->in_urb || !dev->out_urb)
1661 goto error;
1662
1663 usb_fill_bulk_urb(dev->in_urb, dev->udev,
1664 usb_rcvbulkpipe(dev->udev, in_endpoint),
1665 NULL, 0, NULL, dev);
1666 usb_fill_bulk_urb(dev->out_urb, dev->udev,
1667 usb_sndbulkpipe(dev->udev, out_endpoint),
1668 NULL, 0,
1669 pn533_send_complete, dev);
1670
1671 tasklet_init(&dev->tasklet, pn533_tasklet_cmd_complete, (ulong)dev);
1672
1673 usb_set_intfdata(interface, dev);
1674
1675 pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
1676 pn533_tx_frame_finish(dev->out_frame);
1677
1678 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1679 dev->in_maxlen);
1680 if (rc)
1681 goto kill_tasklet;
1682
1683 fw_ver = (struct pn533_fw_version *)
1684 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1685 nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
1686 " attached", fw_ver->ver, fw_ver->rev);
1687
1688 protocols = NFC_PROTO_JEWEL_MASK
1689 | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
1690 | NFC_PROTO_ISO14443_MASK
1691 | NFC_PROTO_NFC_DEP_MASK;
1692
1693 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
1694 PN533_CMD_DATAEXCH_HEAD_LEN,
1695 PN533_FRAME_TAIL_SIZE);
1696 if (!dev->nfc_dev)
1697 goto kill_tasklet;
1698
1699 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
1700 nfc_set_drvdata(dev->nfc_dev, dev);
1701
1702 rc = nfc_register_device(dev->nfc_dev);
1703 if (rc)
1704 goto free_nfc_dev;
1705
1706 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
1707 max_retries.mx_rty_psl = 2;
1708 max_retries.mx_rty_passive_act = PN533_CONFIG_MAX_RETRIES_NO_RETRY;
1709
1710 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
1711 (u8 *) &max_retries, sizeof(max_retries));
1712
1713 if (rc) {
1714 nfc_dev_err(&dev->interface->dev, "Error on setting MAX_RETRIES"
1715 " config");
1716 goto free_nfc_dev;
1717 }
1718
1719 return 0;
1720
1721 free_nfc_dev:
1722 nfc_free_device(dev->nfc_dev);
1723 kill_tasklet:
1724 tasklet_kill(&dev->tasklet);
1725 error:
1726 kfree(dev->in_frame);
1727 usb_free_urb(dev->in_urb);
1728 kfree(dev->out_frame);
1729 usb_free_urb(dev->out_urb);
1730 kfree(dev);
1731 return rc;
1732 }
1733
1734 static void pn533_disconnect(struct usb_interface *interface)
1735 {
1736 struct pn533 *dev;
1737
1738 dev = usb_get_intfdata(interface);
1739 usb_set_intfdata(interface, NULL);
1740
1741 nfc_unregister_device(dev->nfc_dev);
1742 nfc_free_device(dev->nfc_dev);
1743
1744 usb_kill_urb(dev->in_urb);
1745 usb_kill_urb(dev->out_urb);
1746
1747 tasklet_kill(&dev->tasklet);
1748
1749 kfree(dev->in_frame);
1750 usb_free_urb(dev->in_urb);
1751 kfree(dev->out_frame);
1752 usb_free_urb(dev->out_urb);
1753 kfree(dev);
1754
1755 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
1756 }
1757
1758 static struct usb_driver pn533_driver = {
1759 .name = "pn533",
1760 .probe = pn533_probe,
1761 .disconnect = pn533_disconnect,
1762 .id_table = pn533_table,
1763 };
1764
1765 module_usb_driver(pn533_driver);
1766
1767 MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
1768 " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
1769 MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
1770 MODULE_VERSION(VERSION);
1771 MODULE_LICENSE("GPL");