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NFC: Dereference LLCP bind socket address after checking for it to be NULL
[deliverable/linux.git] / drivers / nfc / pn533.c
CommitLineData
c46ee386
AAJ		 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>
55eb94f9 31#include <net/nfc/nfc.h>
c46ee386
AAJ		 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
41static 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};
46MODULE_DEVICE_TABLE(usb, pn533_table);
47
6fbbdc16
SO		 48/* How much time we spend listening for initiators */
49#define PN533_LISTEN_TIME 2
50
c46ee386
AAJ		 51/* frame definitions */
52#define PN533_FRAME_TAIL_SIZE 2
53#define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \
54 PN533_FRAME_TAIL_SIZE)
55#define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1)
56#define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen])
57#define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
58
59/* start of frame */
60#define PN533_SOF 0x00FF
61
62/* frame identifier: in/out/error */
63#define PN533_FRAME_IDENTIFIER(f) (f->data[0])
64#define PN533_DIR_OUT 0xD4
65#define PN533_DIR_IN 0xD5
66
67/* PN533 Commands */
68#define PN533_FRAME_CMD(f) (f->data[1])
69#define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2])
70#define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2)
71
72#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
73#define PN533_CMD_RF_CONFIGURATION 0x32
74#define PN533_CMD_IN_DATA_EXCHANGE 0x40
75#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
76#define PN533_CMD_IN_ATR 0x50
77#define PN533_CMD_IN_RELEASE 0x52
361f3cb7 78#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
c46ee386 79
ad3823ce 80#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
103b34cf 81#define PN533_CMD_TG_GET_DATA 0x86
dadb06f2 82#define PN533_CMD_TG_SET_DATA 0x8e
ad3823ce 83
c46ee386
AAJ		 84#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
85
86/* PN533 Return codes */
87#define PN533_CMD_RET_MASK 0x3F
88#define PN533_CMD_MI_MASK 0x40
89#define PN533_CMD_RET_SUCCESS 0x00
90
103b34cf
SO		 91/* PN533 status codes */
92#define PN533_STATUS_TARGET_RELEASED 0x29
93
c46ee386
AAJ		 94struct pn533;
95
96typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg,
97 u8 *params, int params_len);
98
99/* structs for pn533 commands */
100
101/* PN533_CMD_GET_FIRMWARE_VERSION */
102struct pn533_fw_version {
103 u8 ic;
104 u8 ver;
105 u8 rev;
106 u8 support;
107};
108
109/* PN533_CMD_RF_CONFIGURATION */
34a85bfc 110#define PN533_CFGITEM_TIMING 0x02
c46ee386
AAJ		 111#define PN533_CFGITEM_MAX_RETRIES 0x05
112
34a85bfc
SO		 113#define PN533_CONFIG_TIMING_102 0xb
114#define PN533_CONFIG_TIMING_204 0xc
115#define PN533_CONFIG_TIMING_409 0xd
116#define PN533_CONFIG_TIMING_819 0xe
117
c46ee386
AAJ		 118#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
119#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
120
121struct pn533_config_max_retries {
122 u8 mx_rty_atr;
123 u8 mx_rty_psl;
124 u8 mx_rty_passive_act;
125} __packed;
126
34a85bfc
SO		 127struct pn533_config_timing {
128 u8 rfu;
129 u8 atr_res_timeout;
130 u8 dep_timeout;
131} __packed;
132
c46ee386
AAJ		 133/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
134
135/* felica commands opcode */
136#define PN533_FELICA_OPC_SENSF_REQ 0
137#define PN533_FELICA_OPC_SENSF_RES 1
138/* felica SENSF_REQ parameters */
139#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
140#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
141#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
142#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
143
144/* type B initiator_data values */
145#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
146#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
147#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
148
149union pn533_cmd_poll_initdata {
150 struct {
151 u8 afi;
152 u8 polling_method;
153 } __packed type_b;
154 struct {
155 u8 opcode;
156 __be16 sc;
157 u8 rc;
158 u8 tsn;
159 } __packed felica;
160};
161
162/* Poll modulations */
163enum {
164 PN533_POLL_MOD_106KBPS_A,
165 PN533_POLL_MOD_212KBPS_FELICA,
166 PN533_POLL_MOD_424KBPS_FELICA,
167 PN533_POLL_MOD_106KBPS_JEWEL,
168 PN533_POLL_MOD_847KBPS_B,
6fbbdc16 169 PN533_LISTEN_MOD,
c46ee386
AAJ		 170
171 __PN533_POLL_MOD_AFTER_LAST,
172};
173#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
174
175struct pn533_poll_modulations {
176 struct {
177 u8 maxtg;
178 u8 brty;
179 union pn533_cmd_poll_initdata initiator_data;
180 } __packed data;
181 u8 len;
182};
183
184const struct pn533_poll_modulations poll_mod[] = {
185 [PN533_POLL_MOD_106KBPS_A] = {
186 .data = {
187 .maxtg = 1,
188 .brty = 0,
189 },
190 .len = 2,
191 },
192 [PN533_POLL_MOD_212KBPS_FELICA] = {
193 .data = {
194 .maxtg = 1,
195 .brty = 1,
196 .initiator_data.felica = {
197 .opcode = PN533_FELICA_OPC_SENSF_REQ,
198 .sc = PN533_FELICA_SENSF_SC_ALL,
199 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
200 .tsn = 0,
201 },
202 },
203 .len = 7,
204 },
205 [PN533_POLL_MOD_424KBPS_FELICA] = {
206 .data = {
207 .maxtg = 1,
208 .brty = 2,
209 .initiator_data.felica = {
210 .opcode = PN533_FELICA_OPC_SENSF_REQ,
211 .sc = PN533_FELICA_SENSF_SC_ALL,
212 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
213 .tsn = 0,
214 },
215 },
216 .len = 7,
217 },
218 [PN533_POLL_MOD_106KBPS_JEWEL] = {
219 .data = {
220 .maxtg = 1,
221 .brty = 4,
222 },
223 .len = 2,
224 },
225 [PN533_POLL_MOD_847KBPS_B] = {
226 .data = {
227 .maxtg = 1,
228 .brty = 8,
229 .initiator_data.type_b = {
230 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
231 .polling_method =
232 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
233 },
234 },
235 .len = 3,
236 },
6fbbdc16
SO		 237 [PN533_LISTEN_MOD] = {
238 .len = 0,
239 },
c46ee386
AAJ		 240};
241
242/* PN533_CMD_IN_ATR */
243
244struct pn533_cmd_activate_param {
245 u8 tg;
246 u8 next;
247} __packed;
248
249struct pn533_cmd_activate_response {
250 u8 status;
251 u8 nfcid3t[10];
252 u8 didt;
253 u8 bst;
254 u8 brt;
255 u8 to;
256 u8 ppt;
257 /* optional */
258 u8 gt[];
259} __packed;
260
361f3cb7
SO		 261/* PN533_CMD_IN_JUMP_FOR_DEP */
262struct pn533_cmd_jump_dep {
263 u8 active;
264 u8 baud;
265 u8 next;
d7f3345d 266 u8 data[];
361f3cb7
SO		 267} __packed;
268
269struct pn533_cmd_jump_dep_response {
270 u8 status;
271 u8 tg;
272 u8 nfcid3t[10];
273 u8 didt;
274 u8 bst;
275 u8 brt;
276 u8 to;
277 u8 ppt;
278 /* optional */
279 u8 gt[];
280} __packed;
c46ee386 281
ad3823ce
SO		 282
283/* PN533_TG_INIT_AS_TARGET */
284#define PN533_INIT_TARGET_PASSIVE 0x1
285#define PN533_INIT_TARGET_DEP 0x2
286
fc40a8c1
SO		 287#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
288#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
289#define PN533_INIT_TARGET_RESP_DEP 0x4
290
ad3823ce
SO		 291struct pn533_cmd_init_target {
292 u8 mode;
293 u8 mifare[6];
294 u8 felica[18];
295 u8 nfcid3[10];
296 u8 gb_len;
297 u8 gb[];
298} __packed;
299
300struct pn533_cmd_init_target_response {
301 u8 mode;
302 u8 cmd[];
303} __packed;
304
c46ee386
AAJ		 305struct pn533 {
306 struct usb_device *udev;
307 struct usb_interface *interface;
308 struct nfc_dev *nfc_dev;
309
310 struct urb *out_urb;
311 int out_maxlen;
312 struct pn533_frame *out_frame;
313
314 struct urb *in_urb;
315 int in_maxlen;
316 struct pn533_frame *in_frame;
317
6ff73fd2
SO		 318 struct sk_buff_head resp_q;
319
4849f85e
SO		 320 struct workqueue_struct *wq;
321 struct work_struct cmd_work;
6fbbdc16 322 struct work_struct poll_work;
6ff73fd2 323 struct work_struct mi_work;
103b34cf 324 struct work_struct tg_work;
6fbbdc16 325 struct timer_list listen_timer;
4849f85e
SO		 326 struct pn533_frame *wq_in_frame;
327 int wq_in_error;
6fbbdc16 328 int cancel_listen;
c46ee386
AAJ		 329
330 pn533_cmd_complete_t cmd_complete;
331 void *cmd_complete_arg;
0201ed03 332 struct mutex cmd_lock;
c46ee386
AAJ		 333 u8 cmd;
334
335 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
336 u8 poll_mod_count;
337 u8 poll_mod_curr;
338 u32 poll_protocols;
6fbbdc16
SO		 339 u32 listen_protocols;
340
341 u8 *gb;
342 size_t gb_len;
c46ee386
AAJ		 343
344 u8 tgt_available_prots;
345 u8 tgt_active_prot;
51ad304c 346 u8 tgt_mode;
c46ee386
AAJ		 347};
348
349struct pn533_frame {
350 u8 preamble;
351 __be16 start_frame;
352 u8 datalen;
353 u8 datalen_checksum;
354 u8 data[];
355} __packed;
356
357/* The rule: value + checksum = 0 */
358static inline u8 pn533_checksum(u8 value)
359{
360 return ~value + 1;
361}
362
363/* The rule: sum(data elements) + checksum = 0 */
364static u8 pn533_data_checksum(u8 *data, int datalen)
365{
366 u8 sum = 0;
367 int i;
368
369 for (i = 0; i < datalen; i++)
370 sum += data[i];
371
372 return pn533_checksum(sum);
373}
374
375/**
376 * pn533_tx_frame_ack - create a ack frame
377 * @frame: The frame to be set as ack
378 *
379 * Ack is different type of standard frame. As a standard frame, it has
380 * preamble and start_frame. However the checksum of this frame must fail,
381 * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test
382 * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack.
383 * After datalen_checksum field, the postamble is placed.
384 */
385static void pn533_tx_frame_ack(struct pn533_frame *frame)
386{
387 frame->preamble = 0;
388 frame->start_frame = cpu_to_be16(PN533_SOF);
389 frame->datalen = 0;
390 frame->datalen_checksum = 0xFF;
391 /* data[0] is used as postamble */
392 frame->data[0] = 0;
393}
394
395static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd)
396{
397 frame->preamble = 0;
398 frame->start_frame = cpu_to_be16(PN533_SOF);
399 PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT;
400 PN533_FRAME_CMD(frame) = cmd;
401 frame->datalen = 2;
402}
403
404static void pn533_tx_frame_finish(struct pn533_frame *frame)
405{
406 frame->datalen_checksum = pn533_checksum(frame->datalen);
407
408 PN533_FRAME_CHECKSUM(frame) =
409 pn533_data_checksum(frame->data, frame->datalen);
410
411 PN533_FRAME_POSTAMBLE(frame) = 0;
412}
413
414static bool pn533_rx_frame_is_valid(struct pn533_frame *frame)
415{
416 u8 checksum;
417
418 if (frame->start_frame != cpu_to_be16(PN533_SOF))
419 return false;
420
421 checksum = pn533_checksum(frame->datalen);
422 if (checksum != frame->datalen_checksum)
423 return false;
424
425 checksum = pn533_data_checksum(frame->data, frame->datalen);
426 if (checksum != PN533_FRAME_CHECKSUM(frame))
427 return false;
428
429 return true;
430}
431
432static bool pn533_rx_frame_is_ack(struct pn533_frame *frame)
433{
434 if (frame->start_frame != cpu_to_be16(PN533_SOF))
435 return false;
436
437 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
438 return false;
439
440 return true;
441}
442
443static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
444{
445 return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
446}
447
4849f85e
SO		 448
449static void pn533_wq_cmd_complete(struct work_struct *work)
c46ee386 450{
4849f85e
SO		 451 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
452 struct pn533_frame *in_frame;
c46ee386
AAJ		 453 int rc;
454
4849f85e
SO		 455 in_frame = dev->wq_in_frame;
456
457 if (dev->wq_in_error)
c46ee386 458 rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
4849f85e 459 dev->wq_in_error);
c46ee386
AAJ		 460 else
461 rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
462 PN533_FRAME_CMD_PARAMS_PTR(in_frame),
463 PN533_FRAME_CMD_PARAMS_LEN(in_frame));
464
465 if (rc != -EINPROGRESS)
0201ed03 466 mutex_unlock(&dev->cmd_lock);
c46ee386
AAJ		 467}
468
469static void pn533_recv_response(struct urb *urb)
470{
471 struct pn533 *dev = urb->context;
472 struct pn533_frame *in_frame;
473
4849f85e 474 dev->wq_in_frame = NULL;
c46ee386
AAJ		 475
476 switch (urb->status) {
477 case 0:
478 /* success */
479 break;
480 case -ECONNRESET:
481 case -ENOENT:
482 case -ESHUTDOWN:
483 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
484 " status: %d", urb->status);
4849f85e
SO		 485 dev->wq_in_error = urb->status;
486 goto sched_wq;
c46ee386
AAJ		 487 default:
488 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
489 " %d", urb->status);
4849f85e
SO		 490 dev->wq_in_error = urb->status;
491 goto sched_wq;
c46ee386
AAJ		 492 }
493
494 in_frame = dev->in_urb->transfer_buffer;
495
496 if (!pn533_rx_frame_is_valid(in_frame)) {
497 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
4849f85e
SO		 498 dev->wq_in_error = -EIO;
499 goto sched_wq;
c46ee386
AAJ		 500 }
501
502 if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
503 nfc_dev_err(&dev->interface->dev, "The received frame is not "
504 "response to the last command");
4849f85e
SO		 505 dev->wq_in_error = -EIO;
506 goto sched_wq;
c46ee386
AAJ		 507 }
508
509 nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
4849f85e
SO		 510 dev->wq_in_error = 0;
511 dev->wq_in_frame = in_frame;
c46ee386 512
4849f85e
SO		 513sched_wq:
514 queue_work(dev->wq, &dev->cmd_work);
c46ee386
AAJ		 515}
516
517static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
518{
519 dev->in_urb->complete = pn533_recv_response;
520
521 return usb_submit_urb(dev->in_urb, flags);
522}
523
524static void pn533_recv_ack(struct urb *urb)
525{
526 struct pn533 *dev = urb->context;
527 struct pn533_frame *in_frame;
528 int rc;
529
530 switch (urb->status) {
531 case 0:
532 /* success */
533 break;
534 case -ECONNRESET:
535 case -ENOENT:
536 case -ESHUTDOWN:
537 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
538 " status: %d", urb->status);
4849f85e
SO		 539 dev->wq_in_error = urb->status;
540 goto sched_wq;
c46ee386
AAJ		 541 default:
542 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
543 " %d", urb->status);
4849f85e
SO		 544 dev->wq_in_error = urb->status;
545 goto sched_wq;
c46ee386
AAJ		 546 }
547
548 in_frame = dev->in_urb->transfer_buffer;
549
550 if (!pn533_rx_frame_is_ack(in_frame)) {
551 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
4849f85e
SO		 552 dev->wq_in_error = -EIO;
553 goto sched_wq;
c46ee386
AAJ		 554 }
555
556 nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
557
558 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
559 if (rc) {
560 nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with"
561 " result %d", rc);
4849f85e
SO		 562 dev->wq_in_error = rc;
563 goto sched_wq;
c46ee386
AAJ		 564 }
565
566 return;
567
4849f85e
SO		 568sched_wq:
569 dev->wq_in_frame = NULL;
570 queue_work(dev->wq, &dev->cmd_work);
c46ee386
AAJ		 571}
572
573static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
574{
575 dev->in_urb->complete = pn533_recv_ack;
576
577 return usb_submit_urb(dev->in_urb, flags);
578}
579
580static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
581{
582 int rc;
583
584 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
585
586 pn533_tx_frame_ack(dev->out_frame);
587
588 dev->out_urb->transfer_buffer = dev->out_frame;
589 dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
590 rc = usb_submit_urb(dev->out_urb, flags);
591
592 return rc;
593}
594
595static int __pn533_send_cmd_frame_async(struct pn533 *dev,
596 struct pn533_frame *out_frame,
597 struct pn533_frame *in_frame,
598 int in_frame_len,
599 pn533_cmd_complete_t cmd_complete,
600 void *arg, gfp_t flags)
601{
602 int rc;
603
604 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
605 PN533_FRAME_CMD(out_frame));
606
607 dev->cmd = PN533_FRAME_CMD(out_frame);
608 dev->cmd_complete = cmd_complete;
609 dev->cmd_complete_arg = arg;
610
611 dev->out_urb->transfer_buffer = out_frame;
612 dev->out_urb->transfer_buffer_length =
613 PN533_FRAME_SIZE(out_frame);
614
615 dev->in_urb->transfer_buffer = in_frame;
616 dev->in_urb->transfer_buffer_length = in_frame_len;
617
618 rc = usb_submit_urb(dev->out_urb, flags);
619 if (rc)
620 return rc;
621
622 rc = pn533_submit_urb_for_ack(dev, flags);
623 if (rc)
624 goto error;
625
626 return 0;
627
628error:
629 usb_unlink_urb(dev->out_urb);
630 return rc;
631}
632
633static int pn533_send_cmd_frame_async(struct pn533 *dev,
634 struct pn533_frame *out_frame,
635 struct pn533_frame *in_frame,
636 int in_frame_len,
637 pn533_cmd_complete_t cmd_complete,
638 void *arg, gfp_t flags)
639{
640 int rc;
641
642 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
643
0201ed03 644 if (!mutex_trylock(&dev->cmd_lock))
c46ee386
AAJ		 645 return -EBUSY;
646
647 rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
648 in_frame_len, cmd_complete, arg, flags);
649 if (rc)
650 goto error;
651
652 return 0;
653error:
0201ed03 654 mutex_unlock(&dev->cmd_lock);
c46ee386
AAJ		 655 return rc;
656}
657
658struct pn533_sync_cmd_response {
659 int rc;
660 struct completion done;
661};
662
663static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg,
664 u8 *params, int params_len)
665{
666 struct pn533_sync_cmd_response *arg = _arg;
667
668 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
669
670 arg->rc = 0;
671
672 if (params_len < 0) /* error */
673 arg->rc = params_len;
674
675 complete(&arg->done);
676
677 return 0;
678}
679
680static int pn533_send_cmd_frame_sync(struct pn533 *dev,
681 struct pn533_frame *out_frame,
682 struct pn533_frame *in_frame,
683 int in_frame_len)
684{
685 int rc;
686 struct pn533_sync_cmd_response arg;
687
688 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
689
690 init_completion(&arg.done);
691
692 rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len,
693 pn533_sync_cmd_complete, &arg, GFP_KERNEL);
694 if (rc)
695 return rc;
696
697 wait_for_completion(&arg.done);
698
699 return arg.rc;
700}
701
702static void pn533_send_complete(struct urb *urb)
703{
704 struct pn533 *dev = urb->context;
705
706 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
707
708 switch (urb->status) {
709 case 0:
710 /* success */
711 break;
712 case -ECONNRESET:
713 case -ENOENT:
714 case -ESHUTDOWN:
715 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
716 " status: %d", urb->status);
717 break;
718 default:
719 nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:"
720 " %d", urb->status);
721 }
722}
723
724struct pn533_target_type_a {
725 __be16 sens_res;
726 u8 sel_res;
727 u8 nfcid_len;
728 u8 nfcid_data[];
729} __packed;
730
731
732#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
733#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
734#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
735
736#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
737#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
738
739#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
740#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
741
742#define PN533_TYPE_A_SEL_PROT_MIFARE 0
743#define PN533_TYPE_A_SEL_PROT_ISO14443 1
744#define PN533_TYPE_A_SEL_PROT_DEP 2
745#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
746
747static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
748 int target_data_len)
749{
750 u8 ssd;
751 u8 platconf;
752
753 if (target_data_len < sizeof(struct pn533_target_type_a))
754 return false;
755
756 /* The lenght check of nfcid[] and ats[] are not being performed because
757 the values are not being used */
758
759 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
760 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
761 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
762
763 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
764 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
765 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
766 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
767 return false;
768
769 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
770 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
771 return false;
772
773 return true;
774}
775
776static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
777 int tgt_data_len)
778{
779 struct pn533_target_type_a *tgt_type_a;
780
781 tgt_type_a = (struct pn533_target_type_a *) tgt_data;
782
783 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
784 return -EPROTO;
785
786 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
787 case PN533_TYPE_A_SEL_PROT_MIFARE:
788 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
789 break;
790 case PN533_TYPE_A_SEL_PROT_ISO14443:
791 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
792 break;
793 case PN533_TYPE_A_SEL_PROT_DEP:
794 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
795 break;
796 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
797 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
798 NFC_PROTO_NFC_DEP_MASK;
799 break;
800 }
801
802 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
803 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 804 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
805 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 806
807 return 0;
808}
809
810struct pn533_target_felica {
811 u8 pol_res;
812 u8 opcode;
813 u8 nfcid2[8];
814 u8 pad[8];
815 /* optional */
816 u8 syst_code[];
817} __packed;
818
819#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
820#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
821
822static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
823 int target_data_len)
824{
825 if (target_data_len < sizeof(struct pn533_target_felica))
826 return false;
827
828 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
829 return false;
830
831 return true;
832}
833
834static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
835 int tgt_data_len)
836{
837 struct pn533_target_felica *tgt_felica;
838
839 tgt_felica = (struct pn533_target_felica *) tgt_data;
840
841 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
842 return -EPROTO;
843
844 if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 &&
845 tgt_felica->nfcid2[1] ==
846 PN533_FELICA_SENSF_NFCID2_DEP_B2)
847 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
848 else
849 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
850
7975754f
SO		 851 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
852 nfc_tgt->sensf_res_len = 9;
853
c46ee386
AAJ		 854 return 0;
855}
856
857struct pn533_target_jewel {
858 __be16 sens_res;
859 u8 jewelid[4];
860} __packed;
861
862static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
863 int target_data_len)
864{
865 u8 ssd;
866 u8 platconf;
867
868 if (target_data_len < sizeof(struct pn533_target_jewel))
869 return false;
870
871 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
872 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
873 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
874
875 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
876 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
877 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
878 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
879 return false;
880
881 return true;
882}
883
884static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
885 int tgt_data_len)
886{
887 struct pn533_target_jewel *tgt_jewel;
888
889 tgt_jewel = (struct pn533_target_jewel *) tgt_data;
890
891 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
892 return -EPROTO;
893
894 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
895 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 896 nfc_tgt->nfcid1_len = 4;
897 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 898
899 return 0;
900}
901
902struct pn533_type_b_prot_info {
903 u8 bitrate;
904 u8 fsci_type;
905 u8 fwi_adc_fo;
906} __packed;
907
908#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
909#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
910#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
911
912struct pn533_type_b_sens_res {
913 u8 opcode;
914 u8 nfcid[4];
915 u8 appdata[4];
916 struct pn533_type_b_prot_info prot_info;
917} __packed;
918
919#define PN533_TYPE_B_OPC_SENSB_RES 0x50
920
921struct pn533_target_type_b {
922 struct pn533_type_b_sens_res sensb_res;
923 u8 attrib_res_len;
924 u8 attrib_res[];
925} __packed;
926
927static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
928 int target_data_len)
929{
930 if (target_data_len < sizeof(struct pn533_target_type_b))
931 return false;
932
933 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
934 return false;
935
936 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
937 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
938 return false;
939
940 return true;
941}
942
943static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
944 int tgt_data_len)
945{
946 struct pn533_target_type_b *tgt_type_b;
947
948 tgt_type_b = (struct pn533_target_type_b *) tgt_data;
949
950 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
951 return -EPROTO;
952
953 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
954
955 return 0;
956}
957
958struct pn533_poll_response {
959 u8 nbtg;
960 u8 tg;
961 u8 target_data[];
962} __packed;
963
964static int pn533_target_found(struct pn533 *dev,
965 struct pn533_poll_response *resp, int resp_len)
966{
967 int target_data_len;
968 struct nfc_target nfc_tgt;
969 int rc;
970
971 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
972 dev->poll_mod_curr);
973
974 if (resp->tg != 1)
975 return -EPROTO;
976
98b3ac1b
SO		 977 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
978
c46ee386
AAJ		 979 target_data_len = resp_len - sizeof(struct pn533_poll_response);
980
981 switch (dev->poll_mod_curr) {
982 case PN533_POLL_MOD_106KBPS_A:
983 rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
984 target_data_len);
985 break;
986 case PN533_POLL_MOD_212KBPS_FELICA:
987 case PN533_POLL_MOD_424KBPS_FELICA:
988 rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
989 target_data_len);
990 break;
991 case PN533_POLL_MOD_106KBPS_JEWEL:
992 rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
993 target_data_len);
994 break;
995 case PN533_POLL_MOD_847KBPS_B:
996 rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
997 target_data_len);
998 break;
999 default:
1000 nfc_dev_err(&dev->interface->dev, "Unknown current poll"
1001 " modulation");
1002 return -EPROTO;
1003 }
1004
1005 if (rc)
1006 return rc;
1007
1008 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1009 nfc_dev_dbg(&dev->interface->dev, "The target found does not"
1010 " have the desired protocol");
1011 return -EAGAIN;
1012 }
1013
1014 nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
1015 "0x%x", nfc_tgt.supported_protocols);
1016
1017 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1018
1019 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1020
1021 return 0;
1022}
1023
6fbbdc16
SO		 1024static inline void pn533_poll_next_mod(struct pn533 *dev)
1025{
1026 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1027}
1028
c46ee386
AAJ		 1029static void pn533_poll_reset_mod_list(struct pn533 *dev)
1030{
1031 dev->poll_mod_count = 0;
1032}
1033
1034static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1035{
1036 dev->poll_mod_active[dev->poll_mod_count] =
1037 (struct pn533_poll_modulations *) &poll_mod[mod_index];
1038 dev->poll_mod_count++;
1039}
1040
6fbbdc16
SO		 1041static void pn533_poll_create_mod_list(struct pn533 *dev,
1042 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1043{
1044 pn533_poll_reset_mod_list(dev);
1045
6fbbdc16
SO		 1046 if (im_protocols & NFC_PROTO_MIFARE_MASK
1047 || im_protocols & NFC_PROTO_ISO14443_MASK
1048 || im_protocols & NFC_PROTO_NFC_DEP_MASK)
c46ee386
AAJ		 1049 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1050
6fbbdc16
SO		 1051 if (im_protocols & NFC_PROTO_FELICA_MASK
1052 || im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1053 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1054 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1055 }
1056
6fbbdc16 1057 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1058 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1059
6fbbdc16 1060 if (im_protocols & NFC_PROTO_ISO14443_MASK)
c46ee386 1061 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1062
6fbbdc16
SO		 1063 if (tm_protocols)
1064 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1065}
1066
1067static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
6fbbdc16 1068 u8 *params, int params_len)
c46ee386
AAJ		 1069{
1070 struct pn533_poll_response *resp;
c46ee386
AAJ		 1071 int rc;
1072
1073 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1074
c46ee386
AAJ		 1075 resp = (struct pn533_poll_response *) params;
1076 if (resp->nbtg) {
1077 rc = pn533_target_found(dev, resp, params_len);
1078
1079 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1080 if (rc == 0) {
1081 pn533_poll_reset_mod_list(dev);
1082 return 0;
1083 }
c46ee386
AAJ		 1084 }
1085
6fbbdc16 1086 return -EAGAIN;
c46ee386
AAJ		 1087}
1088
ad3823ce
SO		 1089static int pn533_init_target_frame(struct pn533_frame *frame,
1090 u8 *gb, size_t gb_len)
1091{
1092 struct pn533_cmd_init_target *cmd;
1093 size_t cmd_len;
51d9e803
SO		 1094 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1095 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1096 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1097 0xff, 0xff}; /* System code */
1098 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1099 0x0, 0x0, 0x0,
1100 0x40}; /* SEL_RES for DEP */
ad3823ce
SO		 1101
1102 cmd_len = sizeof(struct pn533_cmd_init_target) + gb_len + 1;
1103 cmd = kzalloc(cmd_len, GFP_KERNEL);
1104 if (cmd == NULL)
1105 return -ENOMEM;
1106
1107 pn533_tx_frame_init(frame, PN533_CMD_TG_INIT_AS_TARGET);
1108
1109 /* DEP support only */
1110 cmd->mode |= PN533_INIT_TARGET_DEP;
51d9e803
SO		 1111
1112 /* Felica params */
1113 memcpy(cmd->felica, felica_params, 18);
1114 get_random_bytes(cmd->felica + 2, 6);
1115
1116 /* NFCID3 */
1117 memset(cmd->nfcid3, 0, 10);
1118 memcpy(cmd->nfcid3, cmd->felica, 8);
1119
1120 /* MIFARE params */
1121 memcpy(cmd->mifare, mifare_params, 6);
1122
1123 /* General bytes */
ad3823ce
SO		 1124 cmd->gb_len = gb_len;
1125 memcpy(cmd->gb, gb, gb_len);
51d9e803 1126
ad3823ce
SO		 1127 /* Len Tk */
1128 cmd->gb[gb_len] = 0;
1129
1130 memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), cmd, cmd_len);
51d9e803 1131
ad3823ce
SO		 1132 frame->datalen += cmd_len;
1133
1134 pn533_tx_frame_finish(frame);
1135
51d9e803
SO		 1136 kfree(cmd);
1137
ad3823ce
SO		 1138 return 0;
1139}
1140
103b34cf
SO		 1141#define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3)
1142#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1143static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
1144 u8 *params, int params_len)
1145{
1146 struct sk_buff *skb_resp = arg;
1147 struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
1148
1149 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1150
1151 if (params_len < 0) {
1152 nfc_dev_err(&dev->interface->dev,
1153 "Error %d when starting as a target",
1154 params_len);
1155
1156 return params_len;
1157 }
1158
1159 if (params_len > 0 && params[0] != 0) {
1160 nfc_tm_deactivated(dev->nfc_dev);
1161
51ad304c
SO		 1162 dev->tgt_mode = 0;
1163
103b34cf
SO		 1164 kfree_skb(skb_resp);
1165 return 0;
1166 }
1167
1168 skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
1169 skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
1170 skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
1171
1172 return nfc_tm_data_received(dev->nfc_dev, skb_resp);
1173}
1174
1175static void pn533_wq_tg_get_data(struct work_struct *work)
1176{
1177 struct pn533 *dev = container_of(work, struct pn533, tg_work);
1178 struct pn533_frame *in_frame;
1179 struct sk_buff *skb_resp;
1180 size_t skb_resp_len;
1181
1182 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1183
1184 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1185 PN533_CMD_DATAEXCH_DATA_MAXLEN +
1186 PN533_FRAME_TAIL_SIZE;
1187
1188 skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
1189 if (!skb_resp)
1190 return;
1191
1192 in_frame = (struct pn533_frame *)skb_resp->data;
1193
1194 pn533_tx_frame_init(dev->out_frame, PN533_CMD_TG_GET_DATA);
1195 pn533_tx_frame_finish(dev->out_frame);
1196
1197 pn533_send_cmd_frame_async(dev, dev->out_frame, in_frame,
1198 skb_resp_len,
1199 pn533_tm_get_data_complete,
1200 skb_resp, GFP_KERNEL);
1201
1202 return;
1203}
1204
fc40a8c1 1205#define ATR_REQ_GB_OFFSET 17
ad3823ce
SO		 1206static int pn533_init_target_complete(struct pn533 *dev, void *arg,
1207 u8 *params, int params_len)
fe7c5800 1208{
ad3823ce 1209 struct pn533_cmd_init_target_response *resp;
fc40a8c1
SO		 1210 u8 frame, comm_mode = NFC_COMM_PASSIVE, *gb;
1211 size_t gb_len;
103b34cf 1212 int rc;
ad3823ce
SO		 1213
1214 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1215
1216 if (params_len < 0) {
1217 nfc_dev_err(&dev->interface->dev,
1218 "Error %d when starting as a target",
1219 params_len);
1220
1221 return params_len;
1222 }
1223
fc40a8c1
SO		 1224 if (params_len < ATR_REQ_GB_OFFSET + 1)
1225 return -EINVAL;
1226
ad3823ce
SO		 1227 resp = (struct pn533_cmd_init_target_response *) params;
1228
fc40a8c1
SO		 1229 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x param len %d\n",
1230 resp->mode, params_len);
ad3823ce 1231
fc40a8c1
SO		 1232 frame = resp->mode & PN533_INIT_TARGET_RESP_FRAME_MASK;
1233 if (frame == PN533_INIT_TARGET_RESP_ACTIVE)
1234 comm_mode = NFC_COMM_ACTIVE;
1235
1236 /* Again, only DEP */
1237 if ((resp->mode & PN533_INIT_TARGET_RESP_DEP) == 0)
1238 return -EOPNOTSUPP;
1239
1240 gb = resp->cmd + ATR_REQ_GB_OFFSET;
1241 gb_len = params_len - (ATR_REQ_GB_OFFSET + 1);
1242
103b34cf
SO		 1243 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1244 comm_mode, gb, gb_len);
1245 if (rc < 0) {
1246 nfc_dev_err(&dev->interface->dev,
1247 "Error when signaling target activation");
1248 return rc;
1249 }
1250
51ad304c
SO		 1251 dev->tgt_mode = 1;
1252
103b34cf
SO		 1253 queue_work(dev->wq, &dev->tg_work);
1254
1255 return 0;
fe7c5800
SO		 1256}
1257
6fbbdc16 1258static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1259{
6fbbdc16
SO		 1260 struct pn533 *dev = (struct pn533 *) data;
1261
1262 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1263
1264 /* An ack will cancel the last issued command (poll) */
1265 pn533_send_ack(dev, GFP_ATOMIC);
1266
1267 dev->cancel_listen = 1;
1268
0201ed03 1269 mutex_unlock(&dev->cmd_lock);
6fbbdc16
SO		 1270
1271 pn533_poll_next_mod(dev);
1272
1273 queue_work(dev->wq, &dev->poll_work);
1274}
1275
1276static int pn533_poll_complete(struct pn533 *dev, void *arg,
1277 u8 *params, int params_len)
1278{
1279 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1280 int rc;
1281
6fbbdc16 1282 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
ad3823ce 1283
6fbbdc16
SO		 1284 if (params_len == -ENOENT) {
1285 if (dev->poll_mod_count != 0)
1286 return 0;
ad3823ce 1287
6fbbdc16
SO		 1288 nfc_dev_err(&dev->interface->dev,
1289 "Polling operation has been stopped");
ad3823ce 1290
6fbbdc16
SO		 1291 goto stop_poll;
1292 }
ad3823ce 1293
6fbbdc16 1294 if (params_len < 0) {
ad3823ce 1295 nfc_dev_err(&dev->interface->dev,
6fbbdc16 1296 "Error %d when running poll", params_len);
ad3823ce 1297
6fbbdc16
SO		 1298 goto stop_poll;
1299 }
ad3823ce 1300
6fbbdc16
SO		 1301 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1302
1303 if (cur_mod->len == 0) {
1304 del_timer(&dev->listen_timer);
1305
1306 return pn533_init_target_complete(dev, arg, params, params_len);
1307 } else {
1308 rc = pn533_start_poll_complete(dev, arg, params, params_len);
1309 if (!rc)
1310 return rc;
1311 }
1312
1313 pn533_poll_next_mod(dev);
1314
1315 queue_work(dev->wq, &dev->poll_work);
1316
1317 return 0;
1318
1319stop_poll:
1320 pn533_poll_reset_mod_list(dev);
1321 dev->poll_protocols = 0;
1322 return 0;
ad3823ce
SO		 1323}
1324
6fbbdc16
SO		 1325static void pn533_build_poll_frame(struct pn533 *dev,
1326 struct pn533_frame *frame,
1327 struct pn533_poll_modulations *mod)
c46ee386 1328{
6fbbdc16 1329 nfc_dev_dbg(&dev->interface->dev, "mod len %d\n", mod->len);
c46ee386 1330
6fbbdc16
SO		 1331 if (mod->len == 0) {
1332 /* Listen mode */
1333 pn533_init_target_frame(frame, dev->gb, dev->gb_len);
1334 } else {
1335 /* Polling mode */
1336 pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
c46ee386 1337
6fbbdc16
SO		 1338 memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
1339 frame->datalen += mod->len;
c46ee386 1340
6fbbdc16 1341 pn533_tx_frame_finish(frame);
c46ee386 1342 }
6fbbdc16 1343}
c46ee386 1344
6fbbdc16
SO		 1345static int pn533_send_poll_frame(struct pn533 *dev)
1346{
1347 struct pn533_poll_modulations *cur_mod;
1348 int rc;
c46ee386 1349
6fbbdc16 1350 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1351
6fbbdc16 1352 pn533_build_poll_frame(dev, dev->out_frame, cur_mod);
c46ee386
AAJ		 1353
1354 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
6fbbdc16 1355 dev->in_maxlen, pn533_poll_complete,
c46ee386 1356 NULL, GFP_KERNEL);
6fbbdc16
SO		 1357 if (rc)
1358 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
c46ee386 1359
6fbbdc16
SO		 1360 return rc;
1361}
1362
1363static void pn533_wq_poll(struct work_struct *work)
1364{
1365 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1366 struct pn533_poll_modulations *cur_mod;
1367 int rc;
1368
1369 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1370
1371 nfc_dev_dbg(&dev->interface->dev,
1372 "%s cancel_listen %d modulation len %d",
1373 __func__, dev->cancel_listen, cur_mod->len);
1374
1375 if (dev->cancel_listen == 1) {
1376 dev->cancel_listen = 0;
1377 usb_kill_urb(dev->in_urb);
c46ee386
AAJ		 1378 }
1379
6fbbdc16
SO		 1380 rc = pn533_send_poll_frame(dev);
1381 if (rc)
1382 return;
c46ee386 1383
6fbbdc16
SO		 1384 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1385 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1386
6fbbdc16 1387 return;
c46ee386
AAJ		 1388}
1389
fe7c5800
SO		 1390static int pn533_start_poll(struct nfc_dev *nfc_dev,
1391 u32 im_protocols, u32 tm_protocols)
1392{
1393 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1394
1395 nfc_dev_dbg(&dev->interface->dev,
1396 "%s: im protocols 0x%x tm protocols 0x%x",
1397 __func__, im_protocols, tm_protocols);
1398
1399 if (dev->tgt_active_prot) {
1400 nfc_dev_err(&dev->interface->dev,
1401 "Cannot poll with a target already activated");
1402 return -EBUSY;
1403 }
1404
51ad304c
SO		 1405 if (dev->tgt_mode) {
1406 nfc_dev_err(&dev->interface->dev,
1407 "Cannot poll while already being activated");
1408 return -EBUSY;
1409 }
1410
6fbbdc16
SO		 1411 if (tm_protocols) {
1412 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1413 if (dev->gb == NULL)
1414 tm_protocols = 0;
1415 }
ad3823ce 1416
6fbbdc16
SO		 1417 dev->poll_mod_curr = 0;
1418 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1419 dev->poll_protocols = im_protocols;
1420 dev->listen_protocols = tm_protocols;
ad3823ce 1421
6fbbdc16 1422 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1423}
1424
c46ee386
AAJ		 1425static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1426{
1427 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1428
1429 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1430
6fbbdc16
SO		 1431 del_timer(&dev->listen_timer);
1432
c46ee386
AAJ		 1433 if (!dev->poll_mod_count) {
1434 nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
1435 " running");
1436 return;
1437 }
1438
1439 /* An ack will cancel the last issued command (poll) */
1440 pn533_send_ack(dev, GFP_KERNEL);
1441
1442 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1443 usb_kill_urb(dev->in_urb);
7c2a04a9
SO		 1444
1445 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1446}
1447
1448static int pn533_activate_target_nfcdep(struct pn533 *dev)
1449{
1450 struct pn533_cmd_activate_param param;
1451 struct pn533_cmd_activate_response *resp;
541d920b 1452 u16 gt_len;
c46ee386
AAJ		 1453 int rc;
1454
1455 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1456
1457 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
1458
1459 param.tg = 1;
1460 param.next = 0;
1461 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &param,
1462 sizeof(struct pn533_cmd_activate_param));
1463 dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
1464
1465 pn533_tx_frame_finish(dev->out_frame);
1466
1467 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1468 dev->in_maxlen);
1469 if (rc)
1470 return rc;
1471
1472 resp = (struct pn533_cmd_activate_response *)
1473 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1474 rc = resp->status & PN533_CMD_RET_MASK;
1475 if (rc != PN533_CMD_RET_SUCCESS)
1476 return -EIO;
1477
541d920b
SO		 1478 /* ATR_RES general bytes are located at offset 16 */
1479 gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
1480 rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
1481
1482 return rc;
c46ee386
AAJ		 1483}
1484
90099433
EL		 1485static int pn533_activate_target(struct nfc_dev *nfc_dev,
1486 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1487{
1488 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1489 int rc;
1490
1491 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1492 protocol);
1493
1494 if (dev->poll_mod_count) {
1495 nfc_dev_err(&dev->interface->dev, "Cannot activate while"
1496 " polling");
1497 return -EBUSY;
1498 }
1499
1500 if (dev->tgt_active_prot) {
1501 nfc_dev_err(&dev->interface->dev, "There is already an active"
1502 " target");
1503 return -EBUSY;
1504 }
1505
1506 if (!dev->tgt_available_prots) {
1507 nfc_dev_err(&dev->interface->dev, "There is no available target"
1508 " to activate");
1509 return -EINVAL;
1510 }
1511
1512 if (!(dev->tgt_available_prots & (1 << protocol))) {
1513 nfc_dev_err(&dev->interface->dev, "The target does not support"
1514 " the requested protocol %u", protocol);
1515 return -EINVAL;
1516 }
1517
1518 if (protocol == NFC_PROTO_NFC_DEP) {
1519 rc = pn533_activate_target_nfcdep(dev);
1520 if (rc) {
1521 nfc_dev_err(&dev->interface->dev, "Error %d when"
1522 " activating target with"
1523 " NFC_DEP protocol", rc);
1524 return rc;
1525 }
1526 }
1527
1528 dev->tgt_active_prot = protocol;
1529 dev->tgt_available_prots = 0;
1530
1531 return 0;
1532}
1533
90099433
EL		 1534static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1535 struct nfc_target *target)
c46ee386
AAJ		 1536{
1537 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1538 u8 tg;
1539 u8 status;
1540 int rc;
1541
1542 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1543
1544 if (!dev->tgt_active_prot) {
1545 nfc_dev_err(&dev->interface->dev, "There is no active target");
1546 return;
1547 }
1548
1549 dev->tgt_active_prot = 0;
1550
6ff73fd2
SO		 1551 skb_queue_purge(&dev->resp_q);
1552
c46ee386
AAJ		 1553 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
1554
1555 tg = 1;
1556 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
1557 dev->out_frame->datalen += sizeof(u8);
1558
1559 pn533_tx_frame_finish(dev->out_frame);
1560
1561 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1562 dev->in_maxlen);
1563 if (rc) {
1564 nfc_dev_err(&dev->interface->dev, "Error when sending release"
1565 " command to the controller");
1566 return;
1567 }
1568
1569 status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
1570 rc = status & PN533_CMD_RET_MASK;
1571 if (rc != PN533_CMD_RET_SUCCESS)
1572 nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
1573 " the target", rc);
1574
1575 return;
1576}
1577
361f3cb7
SO		 1578
1579static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1580 u8 *params, int params_len)
1581{
1582 struct pn533_cmd_jump_dep *cmd;
1583 struct pn533_cmd_jump_dep_response *resp;
1584 struct nfc_target nfc_target;
1585 u8 target_gt_len;
1586 int rc;
1587
1588 if (params_len == -ENOENT) {
1589 nfc_dev_dbg(&dev->interface->dev, "");
1590 return 0;
1591 }
1592
1593 if (params_len < 0) {
1594 nfc_dev_err(&dev->interface->dev,
1595 "Error %d when bringing DEP link up",
1596 params_len);
1597 return 0;
1598 }
1599
1600 if (dev->tgt_available_prots &&
1601 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1602 nfc_dev_err(&dev->interface->dev,
1603 "The target does not support DEP");
1604 return -EINVAL;
1605 }
1606
1607 resp = (struct pn533_cmd_jump_dep_response *) params;
1608 cmd = (struct pn533_cmd_jump_dep *) arg;
1609 rc = resp->status & PN533_CMD_RET_MASK;
1610 if (rc != PN533_CMD_RET_SUCCESS) {
1611 nfc_dev_err(&dev->interface->dev,
1612 "Bringing DEP link up failed %d", rc);
1613 return 0;
1614 }
1615
1616 if (!dev->tgt_available_prots) {
1617 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1618
1619 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4
SO		 1620 nfc_target.nfcid1_len = 10;
1621 memcpy(nfc_target.nfcid1, resp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 1622 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1623 if (rc)
1624 return 0;
1625
1626 dev->tgt_available_prots = 0;
1627 }
1628
1629 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1630
1631 /* ATR_RES general bytes are located at offset 17 */
1632 target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17;
1633 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1634 resp->gt, target_gt_len);
1635 if (rc == 0)
1636 rc = nfc_dep_link_is_up(dev->nfc_dev,
1637 dev->nfc_dev->targets[0].idx,
1638 !cmd->active, NFC_RF_INITIATOR);
1639
1640 return 0;
1641}
1642
41a8ec49
SO		 1643static int pn533_mod_to_baud(struct pn533 *dev)
1644{
1645 switch (dev->poll_mod_curr) {
1646 case PN533_POLL_MOD_106KBPS_A:
1647 return 0;
1648 case PN533_POLL_MOD_212KBPS_FELICA:
1649 return 1;
1650 case PN533_POLL_MOD_424KBPS_FELICA:
1651 return 2;
1652 default:
1653 return -EINVAL;
1654 }
1655}
1656
d7f3345d 1657#define PASSIVE_DATA_LEN 5
90099433 1658static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
47807d3d 1659 u8 comm_mode, u8* gb, size_t gb_len)
361f3cb7
SO		 1660{
1661 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1662 struct pn533_cmd_jump_dep *cmd;
d7f3345d
SO		 1663 u8 cmd_len, *data_ptr;
1664 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
41a8ec49 1665 int rc, baud;
361f3cb7
SO		 1666
1667 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1668
361f3cb7
SO		 1669 if (dev->poll_mod_count) {
1670 nfc_dev_err(&dev->interface->dev,
1671 "Cannot bring the DEP link up while polling");
1672 return -EBUSY;
1673 }
1674
1675 if (dev->tgt_active_prot) {
1676 nfc_dev_err(&dev->interface->dev,
1677 "There is already an active target");
1678 return -EBUSY;
1679 }
1680
41a8ec49
SO		 1681 baud = pn533_mod_to_baud(dev);
1682 if (baud < 0) {
1683 nfc_dev_err(&dev->interface->dev,
1684 "Invalid curr modulation %d", dev->poll_mod_curr);
1685 return baud;
1686 }
1687
47807d3d 1688 cmd_len = sizeof(struct pn533_cmd_jump_dep) + gb_len;
d7f3345d
SO		 1689 if (comm_mode == NFC_COMM_PASSIVE)
1690 cmd_len += PASSIVE_DATA_LEN;
1691
361f3cb7
SO		 1692 cmd = kzalloc(cmd_len, GFP_KERNEL);
1693 if (cmd == NULL)
1694 return -ENOMEM;
1695
1696 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
1697
1698 cmd->active = !comm_mode;
d7f3345d 1699 cmd->next = 0;
41a8ec49 1700 cmd->baud = baud;
d7f3345d
SO		 1701 data_ptr = cmd->data;
1702 if (comm_mode == NFC_COMM_PASSIVE && cmd->baud > 0) {
1703 memcpy(data_ptr, passive_data, PASSIVE_DATA_LEN);
1704 cmd->next |= 1;
1705 data_ptr += PASSIVE_DATA_LEN;
1706 }
1707
47807d3d 1708 if (gb != NULL && gb_len > 0) {
d7f3345d
SO		 1709 cmd->next |= 4; /* We have some Gi */
1710 memcpy(data_ptr, gb, gb_len);
361f3cb7
SO		 1711 } else {
1712 cmd->next = 0;
1713 }
1714
1715 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len);
1716 dev->out_frame->datalen += cmd_len;
1717
1718 pn533_tx_frame_finish(dev->out_frame);
1719
1720 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1721 dev->in_maxlen, pn533_in_dep_link_up_complete,
1722 cmd, GFP_KERNEL);
1723 if (rc)
1724 goto out;
1725
1726
1727out:
1728 kfree(cmd);
1729
1730 return rc;
1731}
1732
1733static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1734{
6fbbdc16
SO		 1735 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1736
1737 pn533_poll_reset_mod_list(dev);
1738
51ad304c
SO		 1739 if (dev->tgt_mode || dev->tgt_active_prot) {
1740 pn533_send_ack(dev, GFP_KERNEL);
1741 usb_kill_urb(dev->in_urb);
1742 }
1743
1744 dev->tgt_active_prot = 0;
1745 dev->tgt_mode = 0;
1746
1747 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 1748
1749 return 0;
1750}
1751
dadb06f2
SO		 1752static int pn533_build_tx_frame(struct pn533 *dev, struct sk_buff *skb,
1753 bool target)
c46ee386
AAJ		 1754{
1755 int payload_len = skb->len;
1756 struct pn533_frame *out_frame;
c46ee386
AAJ		 1757 u8 tg;
1758
1759 nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__,
1760 payload_len);
1761
1762 if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
1763 /* TODO: Implement support to multi-part data exchange */
1764 nfc_dev_err(&dev->interface->dev, "Data length greater than the"
1765 " max allowed: %d",
1766 PN533_CMD_DATAEXCH_DATA_MAXLEN);
1767 return -ENOSYS;
1768 }
1769
dadb06f2
SO		 1770 if (target == true) {
1771 skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN);
1772 out_frame = (struct pn533_frame *) skb->data;
c46ee386 1773
dadb06f2
SO		 1774 pn533_tx_frame_init(out_frame, PN533_CMD_IN_DATA_EXCHANGE);
1775 tg = 1;
1776 memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame), &tg, sizeof(u8));
1777 out_frame->datalen += sizeof(u8);
1778 } else {
1779 skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN - 1);
1780 out_frame = (struct pn533_frame *) skb->data;
1781 pn533_tx_frame_init(out_frame, PN533_CMD_TG_SET_DATA);
1782 }
c46ee386 1783
c46ee386
AAJ		 1784
1785 /* The data is already in the out_frame, just update the datalen */
1786 out_frame->datalen += payload_len;
1787
1788 pn533_tx_frame_finish(out_frame);
1789 skb_put(skb, PN533_FRAME_TAIL_SIZE);
1790
1791 return 0;
1792}
1793
1794struct pn533_data_exchange_arg {
1795 struct sk_buff *skb_resp;
1796 struct sk_buff *skb_out;
1797 data_exchange_cb_t cb;
1798 void *cb_context;
1799};
1800
6ff73fd2
SO		 1801static struct sk_buff *pn533_build_response(struct pn533 *dev)
1802{
1803 struct sk_buff *skb, *tmp, *t;
1804 unsigned int skb_len = 0, tmp_len = 0;
1805
1806 nfc_dev_dbg(&dev->interface->dev, "%s\n", __func__);
1807
1808 if (skb_queue_empty(&dev->resp_q))
1809 return NULL;
1810
1811 if (skb_queue_len(&dev->resp_q) == 1) {
1812 skb = skb_dequeue(&dev->resp_q);
1813 goto out;
1814 }
1815
1816 skb_queue_walk_safe(&dev->resp_q, tmp, t)
1817 skb_len += tmp->len;
1818
1819 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
1820 __func__, skb_len);
1821
1822 skb = alloc_skb(skb_len, GFP_KERNEL);
1823 if (skb == NULL)
1824 goto out;
1825
1826 skb_put(skb, skb_len);
1827
1828 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
1829 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
1830 tmp_len += tmp->len;
1831 }
1832
1833out:
1834 skb_queue_purge(&dev->resp_q);
1835
1836 return skb;
1837}
1838
c46ee386
AAJ		 1839static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
1840 u8 *params, int params_len)
1841{
1842 struct pn533_data_exchange_arg *arg = _arg;
6ff73fd2 1843 struct sk_buff *skb = NULL, *skb_resp = arg->skb_resp;
c46ee386
AAJ		 1844 struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
1845 int err = 0;
1846 u8 status;
1847 u8 cmd_ret;
1848
1849 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1850
6ff73fd2 1851 dev_kfree_skb(arg->skb_out);
c46ee386
AAJ		 1852
1853 if (params_len < 0) { /* error */
1854 err = params_len;
1855 goto error;
1856 }
1857
c46ee386
AAJ		 1858 status = params[0];
1859
1860 cmd_ret = status & PN533_CMD_RET_MASK;
1861 if (cmd_ret != PN533_CMD_RET_SUCCESS) {
1862 nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when"
1863 " exchanging data", cmd_ret);
1864 err = -EIO;
1865 goto error;
1866 }
1867
6ff73fd2
SO		 1868 skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
1869 skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
1870 skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
1871 skb_queue_tail(&dev->resp_q, skb_resp);
1872
c46ee386 1873 if (status & PN533_CMD_MI_MASK) {
6ff73fd2
SO		 1874 queue_work(dev->wq, &dev->mi_work);
1875 return -EINPROGRESS;
c46ee386
AAJ		 1876 }
1877
6ff73fd2
SO		 1878 skb = pn533_build_response(dev);
1879 if (skb == NULL)
1880 goto error;
c46ee386 1881
6ff73fd2 1882 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 1883 kfree(arg);
1884 return 0;
1885
1886error:
6ff73fd2
SO		 1887 skb_queue_purge(&dev->resp_q);
1888 dev_kfree_skb(skb_resp);
c46ee386
AAJ		 1889 arg->cb(arg->cb_context, NULL, err);
1890 kfree(arg);
1891 return 0;
1892}
1893
be9ae4ce
SO		 1894static int pn533_transceive(struct nfc_dev *nfc_dev,
1895 struct nfc_target *target, struct sk_buff *skb,
1896 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 1897{
1898 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1899 struct pn533_frame *out_frame, *in_frame;
1900 struct pn533_data_exchange_arg *arg;
1901 struct sk_buff *skb_resp;
1902 int skb_resp_len;
1903 int rc;
1904
1905 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1906
1907 if (!dev->tgt_active_prot) {
1908 nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
1909 " there is no active target");
1910 rc = -EINVAL;
1911 goto error;
1912 }
1913
dadb06f2 1914 rc = pn533_build_tx_frame(dev, skb, true);
c46ee386
AAJ		 1915 if (rc)
1916 goto error;
1917
1918 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1919 PN533_CMD_DATAEXCH_DATA_MAXLEN +
1920 PN533_FRAME_TAIL_SIZE;
1921
7c7cd3bf 1922 skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
c46ee386
AAJ		 1923 if (!skb_resp) {
1924 rc = -ENOMEM;
1925 goto error;
1926 }
1927
1928 in_frame = (struct pn533_frame *) skb_resp->data;
1929 out_frame = (struct pn533_frame *) skb->data;
1930
1931 arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL);
1932 if (!arg) {
1933 rc = -ENOMEM;
1934 goto free_skb_resp;
1935 }
1936
1937 arg->skb_resp = skb_resp;
1938 arg->skb_out = skb;
1939 arg->cb = cb;
1940 arg->cb_context = cb_context;
1941
1942 rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len,
1943 pn533_data_exchange_complete, arg,
1944 GFP_KERNEL);
1945 if (rc) {
1946 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1947 " perform data_exchange", rc);
1948 goto free_arg;
1949 }
1950
1951 return 0;
1952
1953free_arg:
1954 kfree(arg);
1955free_skb_resp:
1956 kfree_skb(skb_resp);
1957error:
1958 kfree_skb(skb);
1959 return rc;
1960}
1961
dadb06f2
SO		 1962static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
1963 u8 *params, int params_len)
1964{
1965 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1966
1967 if (params_len < 0) {
1968 nfc_dev_err(&dev->interface->dev,
1969 "Error %d when sending data",
1970 params_len);
1971
1972 return params_len;
1973 }
1974
1975 if (params_len > 0 && params[0] != 0) {
1976 nfc_tm_deactivated(dev->nfc_dev);
1977
51ad304c
SO		 1978 dev->tgt_mode = 0;
1979
dadb06f2
SO		 1980 return 0;
1981 }
1982
1983 queue_work(dev->wq, &dev->tg_work);
1984
1985 return 0;
1986}
1987
1988static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
1989{
1990 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1991 struct pn533_frame *out_frame;
1992 int rc;
1993
1994 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1995
1996 rc = pn533_build_tx_frame(dev, skb, false);
1997 if (rc)
1998 goto error;
1999
2000 out_frame = (struct pn533_frame *) skb->data;
2001
2002 rc = pn533_send_cmd_frame_async(dev, out_frame, dev->in_frame,
2003 dev->in_maxlen, pn533_tm_send_complete,
2004 NULL, GFP_KERNEL);
2005 if (rc) {
2006 nfc_dev_err(&dev->interface->dev,
2007 "Error %d when trying to send data", rc);
2008 goto error;
2009 }
2010
2011 return 0;
2012
2013error:
2014 kfree_skb(skb);
2015
2016 return rc;
2017}
2018
6ff73fd2
SO		 2019static void pn533_wq_mi_recv(struct work_struct *work)
2020{
2021 struct pn533 *dev = container_of(work, struct pn533, mi_work);
2022 struct sk_buff *skb_cmd;
2023 struct pn533_data_exchange_arg *arg = dev->cmd_complete_arg;
2024 struct pn533_frame *out_frame, *in_frame;
2025 struct sk_buff *skb_resp;
2026 int skb_resp_len;
2027 int rc;
2028
2029 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2030
2031 /* This is a zero payload size skb */
2032 skb_cmd = alloc_skb(PN533_CMD_DATAEXCH_HEAD_LEN + PN533_FRAME_TAIL_SIZE,
2033 GFP_KERNEL);
2034 if (skb_cmd == NULL)
2035 goto error_cmd;
2036
2037 skb_reserve(skb_cmd, PN533_CMD_DATAEXCH_HEAD_LEN);
2038
dadb06f2 2039 rc = pn533_build_tx_frame(dev, skb_cmd, true);
6ff73fd2
SO		 2040 if (rc)
2041 goto error_frame;
2042
2043 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
2044 PN533_CMD_DATAEXCH_DATA_MAXLEN +
2045 PN533_FRAME_TAIL_SIZE;
2046 skb_resp = alloc_skb(skb_resp_len, GFP_KERNEL);
2047 if (!skb_resp) {
2048 rc = -ENOMEM;
2049 goto error_frame;
2050 }
2051
2052 in_frame = (struct pn533_frame *) skb_resp->data;
2053 out_frame = (struct pn533_frame *) skb_cmd->data;
2054
2055 arg->skb_resp = skb_resp;
2056 arg->skb_out = skb_cmd;
2057
2058 rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
2059 skb_resp_len,
2060 pn533_data_exchange_complete,
2061 dev->cmd_complete_arg, GFP_KERNEL);
2062 if (!rc)
2063 return;
2064
2065 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
2066 " perform data_exchange", rc);
2067
2068 kfree_skb(skb_resp);
2069
2070error_frame:
2071 kfree_skb(skb_cmd);
2072
2073error_cmd:
2074 pn533_send_ack(dev, GFP_KERNEL);
2075
2076 kfree(arg);
2077
0201ed03 2078 mutex_unlock(&dev->cmd_lock);
6ff73fd2
SO		 2079}
2080
c46ee386
AAJ		 2081static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2082 u8 cfgdata_len)
2083{
2084 int rc;
2085 u8 *params;
2086
2087 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2088
2089 pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
2090
2091 params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
2092 params[0] = cfgitem;
2093 memcpy(&params[1], cfgdata, cfgdata_len);
2094 dev->out_frame->datalen += (1 + cfgdata_len);
2095
2096 pn533_tx_frame_finish(dev->out_frame);
2097
2098 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
2099 dev->in_maxlen);
2100
2101 return rc;
2102}
2103
2104struct nfc_ops pn533_nfc_ops = {
8b3fe7b5
IE		 2105 .dev_up = NULL,
2106 .dev_down = NULL,
361f3cb7
SO		 2107 .dep_link_up = pn533_dep_link_up,
2108 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2109 .start_poll = pn533_start_poll,
2110 .stop_poll = pn533_stop_poll,
2111 .activate_target = pn533_activate_target,
2112 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2113 .im_transceive = pn533_transceive,
dadb06f2 2114 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2115};
2116
2117static int pn533_probe(struct usb_interface *interface,
2118 const struct usb_device_id *id)
2119{
2120 struct pn533_fw_version *fw_ver;
2121 struct pn533 *dev;
2122 struct usb_host_interface *iface_desc;
2123 struct usb_endpoint_descriptor *endpoint;
2124 struct pn533_config_max_retries max_retries;
34a85bfc 2125 struct pn533_config_timing timing;
c46ee386
AAJ		 2126 int in_endpoint = 0;
2127 int out_endpoint = 0;
2128 int rc = -ENOMEM;
2129 int i;
2130 u32 protocols;
2131
2132 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2133 if (!dev)
2134 return -ENOMEM;
2135
2136 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2137 dev->interface = interface;
0201ed03 2138 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2139
2140 iface_desc = interface->cur_altsetting;
2141 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2142 endpoint = &iface_desc->endpoint[i].desc;
2143
2144 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
2145 dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize);
2146 in_endpoint = endpoint->bEndpointAddress;
2147 }
2148
2149 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) {
2150 dev->out_maxlen =
2151 le16_to_cpu(endpoint->wMaxPacketSize);
2152 out_endpoint = endpoint->bEndpointAddress;
2153 }
2154 }
2155
2156 if (!in_endpoint || !out_endpoint) {
2157 nfc_dev_err(&interface->dev, "Could not find bulk-in or"
2158 " bulk-out endpoint");
2159 rc = -ENODEV;
2160 goto error;
2161 }
2162
2163 dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
2164 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
2165 dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
2166 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2167
2168 if (!dev->in_frame || !dev->out_frame ||
2169 !dev->in_urb || !dev->out_urb)
2170 goto error;
2171
2172 usb_fill_bulk_urb(dev->in_urb, dev->udev,
2173 usb_rcvbulkpipe(dev->udev, in_endpoint),
2174 NULL, 0, NULL, dev);
2175 usb_fill_bulk_urb(dev->out_urb, dev->udev,
2176 usb_sndbulkpipe(dev->udev, out_endpoint),
2177 NULL, 0,
2178 pn533_send_complete, dev);
2179
4849f85e 2180 INIT_WORK(&dev->cmd_work, pn533_wq_cmd_complete);
6ff73fd2 2181 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
103b34cf 2182 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
6fbbdc16 2183 INIT_WORK(&dev->poll_work, pn533_wq_poll);
6ff73fd2
SO		 2184 dev->wq = alloc_workqueue("pn533",
2185 WQ_NON_REENTRANT | WQ_UNBOUND | WQ_MEM_RECLAIM,
2186 1);
4849f85e
SO		 2187 if (dev->wq == NULL)
2188 goto error;
c46ee386 2189
6fbbdc16
SO		 2190 init_timer(&dev->listen_timer);
2191 dev->listen_timer.data = (unsigned long) dev;
2192 dev->listen_timer.function = pn533_listen_mode_timer;
2193
6ff73fd2
SO		 2194 skb_queue_head_init(&dev->resp_q);
2195
c46ee386
AAJ		 2196 usb_set_intfdata(interface, dev);
2197
2198 pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
2199 pn533_tx_frame_finish(dev->out_frame);
2200
2201 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
2202 dev->in_maxlen);
2203 if (rc)
4849f85e 2204 goto destroy_wq;
c46ee386
AAJ		 2205
2206 fw_ver = (struct pn533_fw_version *)
2207 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
2208 nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
2209 " attached", fw_ver->ver, fw_ver->rev);
2210
2211 protocols = NFC_PROTO_JEWEL_MASK
2212 | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
2213 | NFC_PROTO_ISO14443_MASK
2214 | NFC_PROTO_NFC_DEP_MASK;
2215
e8753043
SO		 2216 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
2217 PN533_CMD_DATAEXCH_HEAD_LEN,
2218 PN533_FRAME_TAIL_SIZE);
c46ee386 2219 if (!dev->nfc_dev)
4849f85e 2220 goto destroy_wq;
c46ee386
AAJ		 2221
2222 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2223 nfc_set_drvdata(dev->nfc_dev, dev);
2224
2225 rc = nfc_register_device(dev->nfc_dev);
2226 if (rc)
2227 goto free_nfc_dev;
2228
2229 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2230 max_retries.mx_rty_psl = 2;
2231 max_retries.mx_rty_passive_act = PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2232
2233 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2234 (u8 *) &max_retries, sizeof(max_retries));
2235
2236 if (rc) {
2237 nfc_dev_err(&dev->interface->dev, "Error on setting MAX_RETRIES"
2238 " config");
9f2f8ba1 2239 goto unregister_nfc_dev;
c46ee386
AAJ		 2240 }
2241
34a85bfc
SO		 2242 timing.rfu = PN533_CONFIG_TIMING_102;
2243 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2244 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2245
2246 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2247 (u8 *) &timing, sizeof(timing));
2248 if (rc) {
2249 nfc_dev_err(&dev->interface->dev,
2250 "Error on setting RF timings");
2251 goto unregister_nfc_dev;
2252 }
2253
c46ee386
AAJ		 2254 return 0;
2255
9f2f8ba1
SO		 2256unregister_nfc_dev:
2257 nfc_unregister_device(dev->nfc_dev);
2258
c46ee386
AAJ		 2259free_nfc_dev:
2260 nfc_free_device(dev->nfc_dev);
9f2f8ba1 2261
4849f85e
SO		 2262destroy_wq:
2263 destroy_workqueue(dev->wq);
c46ee386
AAJ		 2264error:
2265 kfree(dev->in_frame);
2266 usb_free_urb(dev->in_urb);
2267 kfree(dev->out_frame);
2268 usb_free_urb(dev->out_urb);
2269 kfree(dev);
2270 return rc;
2271}
2272
2273static void pn533_disconnect(struct usb_interface *interface)
2274{
2275 struct pn533 *dev;
2276
2277 dev = usb_get_intfdata(interface);
2278 usb_set_intfdata(interface, NULL);
2279
2280 nfc_unregister_device(dev->nfc_dev);
2281 nfc_free_device(dev->nfc_dev);
2282
2283 usb_kill_urb(dev->in_urb);
2284 usb_kill_urb(dev->out_urb);
2285
4849f85e 2286 destroy_workqueue(dev->wq);
c46ee386 2287
6ff73fd2
SO		 2288 skb_queue_purge(&dev->resp_q);
2289
6fbbdc16
SO		 2290 del_timer(&dev->listen_timer);
2291
c46ee386
AAJ		 2292 kfree(dev->in_frame);
2293 usb_free_urb(dev->in_urb);
2294 kfree(dev->out_frame);
2295 usb_free_urb(dev->out_urb);
2296 kfree(dev);
2297
276556db 2298 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 2299}
2300
2301static struct usb_driver pn533_driver = {
2302 .name = "pn533",
2303 .probe = pn533_probe,
2304 .disconnect = pn533_disconnect,
2305 .id_table = pn533_table,
2306};
2307
fe748483 2308module_usb_driver(pn533_driver);
c46ee386
AAJ		 2309
2310MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
2311 " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2312MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2313MODULE_VERSION(VERSION);
2314MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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