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NFC: Clear pn533 target structure
[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
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
361f3cb7 75#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
c46ee386
AAJ		 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
84struct pn533;
85
86typedef 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 */
92struct 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
105struct 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
127union 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 */
141enum {
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
152struct 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
161const 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
218struct pn533_cmd_activate_param {
219 u8 tg;
220 u8 next;
221} __packed;
222
223struct 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
361f3cb7
SO		 235/* PN533_CMD_IN_JUMP_FOR_DEP */
236struct pn533_cmd_jump_dep {
237 u8 active;
238 u8 baud;
239 u8 next;
240 u8 gt[];
241} __packed;
242
243struct 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;
c46ee386
AAJ		 255
256struct 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
287struct 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 */
296static inline u8 pn533_checksum(u8 value)
297{
298 return ~value + 1;
299}
300
301/* The rule: sum(data elements) + checksum = 0 */
302static 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 */
323static 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
333static 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
342static 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
352static 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
370static 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
381static 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
386static 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
404static 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
448sched_tasklet:
449 tasklet_schedule(&dev->tasklet);
450}
451
452static 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
459static 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
503sched_tasklet:
504 dev->tklt_in_frame = NULL;
505 tasklet_schedule(&dev->tasklet);
506}
507
508static 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
515static 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
530static 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
563error:
564 usb_unlink_urb(dev->out_urb);
565 return rc;
566}
567
568static 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;
588error:
589 up(&dev->cmd_lock);
590 return rc;
591}
592
593struct pn533_sync_cmd_response {
594 int rc;
595 struct completion done;
596};
597
598static 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
615static 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
637static 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
659struct 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
682static 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
711static 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;
c3b1e1e8
SO		 739 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
740 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 741
742 return 0;
743}
744
745struct 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
757static 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
769static 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 return 0;
787}
788
789struct pn533_target_jewel {
790 __be16 sens_res;
791 u8 jewelid[4];
792} __packed;
793
794static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
795 int target_data_len)
796{
797 u8 ssd;
798 u8 platconf;
799
800 if (target_data_len < sizeof(struct pn533_target_jewel))
801 return false;
802
803 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
804 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
805 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
806
807 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
808 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
809 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
810 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
811 return false;
812
813 return true;
814}
815
816static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
817 int tgt_data_len)
818{
819 struct pn533_target_jewel *tgt_jewel;
820
821 tgt_jewel = (struct pn533_target_jewel *) tgt_data;
822
823 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
824 return -EPROTO;
825
826 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
827 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
828
829 return 0;
830}
831
832struct pn533_type_b_prot_info {
833 u8 bitrate;
834 u8 fsci_type;
835 u8 fwi_adc_fo;
836} __packed;
837
838#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
839#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
840#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
841
842struct pn533_type_b_sens_res {
843 u8 opcode;
844 u8 nfcid[4];
845 u8 appdata[4];
846 struct pn533_type_b_prot_info prot_info;
847} __packed;
848
849#define PN533_TYPE_B_OPC_SENSB_RES 0x50
850
851struct pn533_target_type_b {
852 struct pn533_type_b_sens_res sensb_res;
853 u8 attrib_res_len;
854 u8 attrib_res[];
855} __packed;
856
857static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
858 int target_data_len)
859{
860 if (target_data_len < sizeof(struct pn533_target_type_b))
861 return false;
862
863 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
864 return false;
865
866 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
867 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
868 return false;
869
870 return true;
871}
872
873static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
874 int tgt_data_len)
875{
876 struct pn533_target_type_b *tgt_type_b;
877
878 tgt_type_b = (struct pn533_target_type_b *) tgt_data;
879
880 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
881 return -EPROTO;
882
883 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
884
885 return 0;
886}
887
888struct pn533_poll_response {
889 u8 nbtg;
890 u8 tg;
891 u8 target_data[];
892} __packed;
893
894static int pn533_target_found(struct pn533 *dev,
895 struct pn533_poll_response *resp, int resp_len)
896{
897 int target_data_len;
898 struct nfc_target nfc_tgt;
899 int rc;
900
901 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
902 dev->poll_mod_curr);
903
904 if (resp->tg != 1)
905 return -EPROTO;
906
98b3ac1b
SO		 907 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
908
c46ee386
AAJ		 909 target_data_len = resp_len - sizeof(struct pn533_poll_response);
910
911 switch (dev->poll_mod_curr) {
912 case PN533_POLL_MOD_106KBPS_A:
913 rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
914 target_data_len);
915 break;
916 case PN533_POLL_MOD_212KBPS_FELICA:
917 case PN533_POLL_MOD_424KBPS_FELICA:
918 rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
919 target_data_len);
920 break;
921 case PN533_POLL_MOD_106KBPS_JEWEL:
922 rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
923 target_data_len);
924 break;
925 case PN533_POLL_MOD_847KBPS_B:
926 rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
927 target_data_len);
928 break;
929 default:
930 nfc_dev_err(&dev->interface->dev, "Unknown current poll"
931 " modulation");
932 return -EPROTO;
933 }
934
935 if (rc)
936 return rc;
937
938 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
939 nfc_dev_dbg(&dev->interface->dev, "The target found does not"
940 " have the desired protocol");
941 return -EAGAIN;
942 }
943
944 nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
945 "0x%x", nfc_tgt.supported_protocols);
946
947 dev->tgt_available_prots = nfc_tgt.supported_protocols;
948
949 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
950
951 return 0;
952}
953
954static void pn533_poll_reset_mod_list(struct pn533 *dev)
955{
956 dev->poll_mod_count = 0;
957}
958
959static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
960{
961 dev->poll_mod_active[dev->poll_mod_count] =
962 (struct pn533_poll_modulations *) &poll_mod[mod_index];
963 dev->poll_mod_count++;
964}
965
966static void pn533_poll_create_mod_list(struct pn533 *dev, u32 protocols)
967{
968 pn533_poll_reset_mod_list(dev);
969
970 if (protocols & NFC_PROTO_MIFARE_MASK
971 || protocols & NFC_PROTO_ISO14443_MASK
972 || protocols & NFC_PROTO_NFC_DEP_MASK)
973 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
974
975 if (protocols & NFC_PROTO_FELICA_MASK
976 || protocols & NFC_PROTO_NFC_DEP_MASK) {
977 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
978 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
979 }
980
981 if (protocols & NFC_PROTO_JEWEL_MASK)
982 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
983
984 if (protocols & NFC_PROTO_ISO14443_MASK)
985 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
986}
987
988static void pn533_start_poll_frame(struct pn533_frame *frame,
989 struct pn533_poll_modulations *mod)
990{
991
992 pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
993
994 memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
995 frame->datalen += mod->len;
996
997 pn533_tx_frame_finish(frame);
998}
999
1000static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
1001 u8 *params, int params_len)
1002{
1003 struct pn533_poll_response *resp;
1004 struct pn533_poll_modulations *next_mod;
1005 int rc;
1006
1007 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1008
1009 if (params_len == -ENOENT) {
1010 nfc_dev_dbg(&dev->interface->dev, "Polling operation has been"
1011 " stopped");
1012 goto stop_poll;
1013 }
1014
1015 if (params_len < 0) {
1016 nfc_dev_err(&dev->interface->dev, "Error %d when running poll",
1017 params_len);
1018 goto stop_poll;
1019 }
1020
1021 resp = (struct pn533_poll_response *) params;
1022 if (resp->nbtg) {
1023 rc = pn533_target_found(dev, resp, params_len);
1024
1025 /* We must stop the poll after a valid target found */
1026 if (rc == 0)
1027 goto stop_poll;
1028
1029 if (rc != -EAGAIN)
1030 nfc_dev_err(&dev->interface->dev, "The target found is"
1031 " not valid - continuing to poll");
1032 }
1033
1034 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1035
1036 next_mod = dev->poll_mod_active[dev->poll_mod_curr];
1037
1038 nfc_dev_dbg(&dev->interface->dev, "Polling next modulation (0x%x)",
1039 dev->poll_mod_curr);
1040
1041 pn533_start_poll_frame(dev->out_frame, next_mod);
1042
1043 /* Don't need to down the semaphore again */
1044 rc = __pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1045 dev->in_maxlen, pn533_start_poll_complete,
1046 NULL, GFP_ATOMIC);
1047
1048 if (rc == -EPERM) {
1049 nfc_dev_dbg(&dev->interface->dev, "Cannot poll next modulation"
1050 " because poll has been stopped");
1051 goto stop_poll;
1052 }
1053
1054 if (rc) {
1055 nfc_dev_err(&dev->interface->dev, "Error %d when trying to poll"
1056 " next modulation", rc);
1057 goto stop_poll;
1058 }
1059
1060 /* Inform caller function to do not up the semaphore */
1061 return -EINPROGRESS;
1062
1063stop_poll:
1064 pn533_poll_reset_mod_list(dev);
1065 dev->poll_protocols = 0;
1066 return 0;
1067}
1068
1069static int pn533_start_poll(struct nfc_dev *nfc_dev, u32 protocols)
1070{
1071 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1072 struct pn533_poll_modulations *start_mod;
1073 int rc;
1074
1075 nfc_dev_dbg(&dev->interface->dev, "%s - protocols=0x%x", __func__,
1076 protocols);
1077
1078 if (dev->poll_mod_count) {
1079 nfc_dev_err(&dev->interface->dev, "Polling operation already"
1080 " active");
1081 return -EBUSY;
1082 }
1083
1084 if (dev->tgt_active_prot) {
1085 nfc_dev_err(&dev->interface->dev, "Cannot poll with a target"
1086 " already activated");
1087 return -EBUSY;
1088 }
1089
1090 pn533_poll_create_mod_list(dev, protocols);
1091
1092 if (!dev->poll_mod_count) {
1093 nfc_dev_err(&dev->interface->dev, "No valid protocols"
1094 " specified");
1095 rc = -EINVAL;
1096 goto error;
1097 }
1098
1099 nfc_dev_dbg(&dev->interface->dev, "It will poll %d modulations types",
1100 dev->poll_mod_count);
1101
1102 dev->poll_mod_curr = 0;
1103 start_mod = dev->poll_mod_active[dev->poll_mod_curr];
1104
1105 pn533_start_poll_frame(dev->out_frame, start_mod);
1106
1107 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1108 dev->in_maxlen, pn533_start_poll_complete,
1109 NULL, GFP_KERNEL);
1110
1111 if (rc) {
1112 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1113 " start poll", rc);
1114 goto error;
1115 }
1116
1117 dev->poll_protocols = protocols;
1118
1119 return 0;
1120
1121error:
1122 pn533_poll_reset_mod_list(dev);
1123 return rc;
1124}
1125
1126static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1127{
1128 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1129
1130 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1131
1132 if (!dev->poll_mod_count) {
1133 nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
1134 " running");
1135 return;
1136 }
1137
1138 /* An ack will cancel the last issued command (poll) */
1139 pn533_send_ack(dev, GFP_KERNEL);
1140
1141 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1142 usb_kill_urb(dev->in_urb);
1143}
1144
1145static int pn533_activate_target_nfcdep(struct pn533 *dev)
1146{
1147 struct pn533_cmd_activate_param param;
1148 struct pn533_cmd_activate_response *resp;
541d920b 1149 u16 gt_len;
c46ee386
AAJ		 1150 int rc;
1151
1152 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1153
1154 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
1155
1156 param.tg = 1;
1157 param.next = 0;
1158 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &param,
1159 sizeof(struct pn533_cmd_activate_param));
1160 dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
1161
1162 pn533_tx_frame_finish(dev->out_frame);
1163
1164 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1165 dev->in_maxlen);
1166 if (rc)
1167 return rc;
1168
1169 resp = (struct pn533_cmd_activate_response *)
1170 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1171 rc = resp->status & PN533_CMD_RET_MASK;
1172 if (rc != PN533_CMD_RET_SUCCESS)
1173 return -EIO;
1174
541d920b
SO		 1175 /* ATR_RES general bytes are located at offset 16 */
1176 gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
1177 rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
1178
1179 return rc;
c46ee386
AAJ		 1180}
1181
1182static int pn533_activate_target(struct nfc_dev *nfc_dev, u32 target_idx,
1183 u32 protocol)
1184{
1185 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1186 int rc;
1187
1188 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1189 protocol);
1190
1191 if (dev->poll_mod_count) {
1192 nfc_dev_err(&dev->interface->dev, "Cannot activate while"
1193 " polling");
1194 return -EBUSY;
1195 }
1196
1197 if (dev->tgt_active_prot) {
1198 nfc_dev_err(&dev->interface->dev, "There is already an active"
1199 " target");
1200 return -EBUSY;
1201 }
1202
1203 if (!dev->tgt_available_prots) {
1204 nfc_dev_err(&dev->interface->dev, "There is no available target"
1205 " to activate");
1206 return -EINVAL;
1207 }
1208
1209 if (!(dev->tgt_available_prots & (1 << protocol))) {
1210 nfc_dev_err(&dev->interface->dev, "The target does not support"
1211 " the requested protocol %u", protocol);
1212 return -EINVAL;
1213 }
1214
1215 if (protocol == NFC_PROTO_NFC_DEP) {
1216 rc = pn533_activate_target_nfcdep(dev);
1217 if (rc) {
1218 nfc_dev_err(&dev->interface->dev, "Error %d when"
1219 " activating target with"
1220 " NFC_DEP protocol", rc);
1221 return rc;
1222 }
1223 }
1224
1225 dev->tgt_active_prot = protocol;
1226 dev->tgt_available_prots = 0;
1227
1228 return 0;
1229}
1230
1231static void pn533_deactivate_target(struct nfc_dev *nfc_dev, u32 target_idx)
1232{
1233 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1234 u8 tg;
1235 u8 status;
1236 int rc;
1237
1238 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1239
1240 if (!dev->tgt_active_prot) {
1241 nfc_dev_err(&dev->interface->dev, "There is no active target");
1242 return;
1243 }
1244
1245 dev->tgt_active_prot = 0;
1246
1247 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
1248
1249 tg = 1;
1250 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
1251 dev->out_frame->datalen += sizeof(u8);
1252
1253 pn533_tx_frame_finish(dev->out_frame);
1254
1255 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1256 dev->in_maxlen);
1257 if (rc) {
1258 nfc_dev_err(&dev->interface->dev, "Error when sending release"
1259 " command to the controller");
1260 return;
1261 }
1262
1263 status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
1264 rc = status & PN533_CMD_RET_MASK;
1265 if (rc != PN533_CMD_RET_SUCCESS)
1266 nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
1267 " the target", rc);
1268
1269 return;
1270}
1271
361f3cb7
SO		 1272
1273static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1274 u8 *params, int params_len)
1275{
1276 struct pn533_cmd_jump_dep *cmd;
1277 struct pn533_cmd_jump_dep_response *resp;
1278 struct nfc_target nfc_target;
1279 u8 target_gt_len;
1280 int rc;
1281
1282 if (params_len == -ENOENT) {
1283 nfc_dev_dbg(&dev->interface->dev, "");
1284 return 0;
1285 }
1286
1287 if (params_len < 0) {
1288 nfc_dev_err(&dev->interface->dev,
1289 "Error %d when bringing DEP link up",
1290 params_len);
1291 return 0;
1292 }
1293
1294 if (dev->tgt_available_prots &&
1295 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1296 nfc_dev_err(&dev->interface->dev,
1297 "The target does not support DEP");
1298 return -EINVAL;
1299 }
1300
1301 resp = (struct pn533_cmd_jump_dep_response *) params;
1302 cmd = (struct pn533_cmd_jump_dep *) arg;
1303 rc = resp->status & PN533_CMD_RET_MASK;
1304 if (rc != PN533_CMD_RET_SUCCESS) {
1305 nfc_dev_err(&dev->interface->dev,
1306 "Bringing DEP link up failed %d", rc);
1307 return 0;
1308 }
1309
1310 if (!dev->tgt_available_prots) {
1311 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1312
1313 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1314 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1315 if (rc)
1316 return 0;
1317
1318 dev->tgt_available_prots = 0;
1319 }
1320
1321 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1322
1323 /* ATR_RES general bytes are located at offset 17 */
1324 target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17;
1325 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1326 resp->gt, target_gt_len);
1327 if (rc == 0)
1328 rc = nfc_dep_link_is_up(dev->nfc_dev,
1329 dev->nfc_dev->targets[0].idx,
1330 !cmd->active, NFC_RF_INITIATOR);
1331
1332 return 0;
1333}
1334
1335static int pn533_dep_link_up(struct nfc_dev *nfc_dev, int target_idx,
1336 u8 comm_mode, u8 rf_mode)
1337{
1338 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1339 struct pn533_cmd_jump_dep *cmd;
1340 u8 cmd_len, local_gt_len, *local_gt;
1341 int rc;
1342
1343 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1344
1345 if (rf_mode == NFC_RF_TARGET) {
1346 nfc_dev_err(&dev->interface->dev, "Target mode not supported");
1347 return -EOPNOTSUPP;
1348 }
1349
1350
1351 if (dev->poll_mod_count) {
1352 nfc_dev_err(&dev->interface->dev,
1353 "Cannot bring the DEP link up while polling");
1354 return -EBUSY;
1355 }
1356
1357 if (dev->tgt_active_prot) {
1358 nfc_dev_err(&dev->interface->dev,
1359 "There is already an active target");
1360 return -EBUSY;
1361 }
1362
1363 local_gt = nfc_get_local_general_bytes(dev->nfc_dev, &local_gt_len);
1364 if (local_gt_len > NFC_MAX_GT_LEN)
1365 return -EINVAL;
1366
1367 cmd_len = sizeof(struct pn533_cmd_jump_dep) + local_gt_len;
1368 cmd = kzalloc(cmd_len, GFP_KERNEL);
1369 if (cmd == NULL)
1370 return -ENOMEM;
1371
1372 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
1373
1374 cmd->active = !comm_mode;
1375 cmd->baud = 0;
1376 if (local_gt != NULL) {
1377 cmd->next = 4; /* We have some Gi */
1378 memcpy(cmd->gt, local_gt, local_gt_len);
1379 } else {
1380 cmd->next = 0;
1381 }
1382
1383 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len);
1384 dev->out_frame->datalen += cmd_len;
1385
1386 pn533_tx_frame_finish(dev->out_frame);
1387
1388 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1389 dev->in_maxlen, pn533_in_dep_link_up_complete,
1390 cmd, GFP_KERNEL);
1391 if (rc)
1392 goto out;
1393
1394
1395out:
1396 kfree(cmd);
1397
1398 return rc;
1399}
1400
1401static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1402{
1403 pn533_deactivate_target(nfc_dev, 0);
1404
1405 return 0;
1406}
1407
c46ee386
AAJ		 1408#define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3)
1409#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1410
1411static int pn533_data_exchange_tx_frame(struct pn533 *dev, struct sk_buff *skb)
1412{
1413 int payload_len = skb->len;
1414 struct pn533_frame *out_frame;
c46ee386
AAJ		 1415 u8 tg;
1416
1417 nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__,
1418 payload_len);
1419
1420 if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
1421 /* TODO: Implement support to multi-part data exchange */
1422 nfc_dev_err(&dev->interface->dev, "Data length greater than the"
1423 " max allowed: %d",
1424 PN533_CMD_DATAEXCH_DATA_MAXLEN);
1425 return -ENOSYS;
1426 }
1427
c46ee386
AAJ		 1428 skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN);
1429 out_frame = (struct pn533_frame *) skb->data;
1430
1431 pn533_tx_frame_init(out_frame, PN533_CMD_IN_DATA_EXCHANGE);
1432
1433 tg = 1;
1434 memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame), &tg, sizeof(u8));
1435 out_frame->datalen += sizeof(u8);
1436
1437 /* The data is already in the out_frame, just update the datalen */
1438 out_frame->datalen += payload_len;
1439
1440 pn533_tx_frame_finish(out_frame);
1441 skb_put(skb, PN533_FRAME_TAIL_SIZE);
1442
1443 return 0;
1444}
1445
1446struct pn533_data_exchange_arg {
1447 struct sk_buff *skb_resp;
1448 struct sk_buff *skb_out;
1449 data_exchange_cb_t cb;
1450 void *cb_context;
1451};
1452
1453static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
1454 u8 *params, int params_len)
1455{
1456 struct pn533_data_exchange_arg *arg = _arg;
1457 struct sk_buff *skb_resp = arg->skb_resp;
1458 struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
1459 int err = 0;
1460 u8 status;
1461 u8 cmd_ret;
1462
1463 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1464
1465 dev_kfree_skb_irq(arg->skb_out);
1466
1467 if (params_len < 0) { /* error */
1468 err = params_len;
1469 goto error;
1470 }
1471
1472 skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
1473
1474 status = params[0];
1475
1476 cmd_ret = status & PN533_CMD_RET_MASK;
1477 if (cmd_ret != PN533_CMD_RET_SUCCESS) {
1478 nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when"
1479 " exchanging data", cmd_ret);
1480 err = -EIO;
1481 goto error;
1482 }
1483
1484 if (status & PN533_CMD_MI_MASK) {
1485 /* TODO: Implement support to multi-part data exchange */
1486 nfc_dev_err(&dev->interface->dev, "Multi-part message not yet"
1487 " supported");
1488 /* Prevent the other messages from controller */
1489 pn533_send_ack(dev, GFP_ATOMIC);
1490 err = -ENOSYS;
1491 goto error;
1492 }
1493
1494 skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
1495 skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
1496
1497 arg->cb(arg->cb_context, skb_resp, 0);
1498 kfree(arg);
1499 return 0;
1500
1501error:
1502 dev_kfree_skb_irq(skb_resp);
1503 arg->cb(arg->cb_context, NULL, err);
1504 kfree(arg);
1505 return 0;
1506}
1507
85eb28a3 1508static int pn533_data_exchange(struct nfc_dev *nfc_dev, u32 target_idx,
c46ee386
AAJ		 1509 struct sk_buff *skb,
1510 data_exchange_cb_t cb,
1511 void *cb_context)
1512{
1513 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1514 struct pn533_frame *out_frame, *in_frame;
1515 struct pn533_data_exchange_arg *arg;
1516 struct sk_buff *skb_resp;
1517 int skb_resp_len;
1518 int rc;
1519
1520 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1521
1522 if (!dev->tgt_active_prot) {
1523 nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
1524 " there is no active target");
1525 rc = -EINVAL;
1526 goto error;
1527 }
1528
1529 rc = pn533_data_exchange_tx_frame(dev, skb);
1530 if (rc)
1531 goto error;
1532
1533 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1534 PN533_CMD_DATAEXCH_DATA_MAXLEN +
1535 PN533_FRAME_TAIL_SIZE;
1536
7c7cd3bf 1537 skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
c46ee386
AAJ		 1538 if (!skb_resp) {
1539 rc = -ENOMEM;
1540 goto error;
1541 }
1542
1543 in_frame = (struct pn533_frame *) skb_resp->data;
1544 out_frame = (struct pn533_frame *) skb->data;
1545
1546 arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL);
1547 if (!arg) {
1548 rc = -ENOMEM;
1549 goto free_skb_resp;
1550 }
1551
1552 arg->skb_resp = skb_resp;
1553 arg->skb_out = skb;
1554 arg->cb = cb;
1555 arg->cb_context = cb_context;
1556
1557 rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len,
1558 pn533_data_exchange_complete, arg,
1559 GFP_KERNEL);
1560 if (rc) {
1561 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1562 " perform data_exchange", rc);
1563 goto free_arg;
1564 }
1565
1566 return 0;
1567
1568free_arg:
1569 kfree(arg);
1570free_skb_resp:
1571 kfree_skb(skb_resp);
1572error:
1573 kfree_skb(skb);
1574 return rc;
1575}
1576
1577static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
1578 u8 cfgdata_len)
1579{
1580 int rc;
1581 u8 *params;
1582
1583 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1584
1585 pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
1586
1587 params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
1588 params[0] = cfgitem;
1589 memcpy(&params[1], cfgdata, cfgdata_len);
1590 dev->out_frame->datalen += (1 + cfgdata_len);
1591
1592 pn533_tx_frame_finish(dev->out_frame);
1593
1594 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1595 dev->in_maxlen);
1596
1597 return rc;
1598}
1599
1600struct nfc_ops pn533_nfc_ops = {
8b3fe7b5
IE		 1601 .dev_up = NULL,
1602 .dev_down = NULL,
361f3cb7
SO		 1603 .dep_link_up = pn533_dep_link_up,
1604 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 1605 .start_poll = pn533_start_poll,
1606 .stop_poll = pn533_stop_poll,
1607 .activate_target = pn533_activate_target,
1608 .deactivate_target = pn533_deactivate_target,
1609 .data_exchange = pn533_data_exchange,
1610};
1611
1612static int pn533_probe(struct usb_interface *interface,
1613 const struct usb_device_id *id)
1614{
1615 struct pn533_fw_version *fw_ver;
1616 struct pn533 *dev;
1617 struct usb_host_interface *iface_desc;
1618 struct usb_endpoint_descriptor *endpoint;
1619 struct pn533_config_max_retries max_retries;
1620 int in_endpoint = 0;
1621 int out_endpoint = 0;
1622 int rc = -ENOMEM;
1623 int i;
1624 u32 protocols;
1625
1626 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1627 if (!dev)
1628 return -ENOMEM;
1629
1630 dev->udev = usb_get_dev(interface_to_usbdev(interface));
1631 dev->interface = interface;
1632 sema_init(&dev->cmd_lock, 1);
1633
1634 iface_desc = interface->cur_altsetting;
1635 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1636 endpoint = &iface_desc->endpoint[i].desc;
1637
1638 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1639 dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize);
1640 in_endpoint = endpoint->bEndpointAddress;
1641 }
1642
1643 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) {
1644 dev->out_maxlen =
1645 le16_to_cpu(endpoint->wMaxPacketSize);
1646 out_endpoint = endpoint->bEndpointAddress;
1647 }
1648 }
1649
1650 if (!in_endpoint || !out_endpoint) {
1651 nfc_dev_err(&interface->dev, "Could not find bulk-in or"
1652 " bulk-out endpoint");
1653 rc = -ENODEV;
1654 goto error;
1655 }
1656
1657 dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
1658 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1659 dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
1660 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1661
1662 if (!dev->in_frame || !dev->out_frame ||
1663 !dev->in_urb || !dev->out_urb)
1664 goto error;
1665
1666 usb_fill_bulk_urb(dev->in_urb, dev->udev,
1667 usb_rcvbulkpipe(dev->udev, in_endpoint),
1668 NULL, 0, NULL, dev);
1669 usb_fill_bulk_urb(dev->out_urb, dev->udev,
1670 usb_sndbulkpipe(dev->udev, out_endpoint),
1671 NULL, 0,
1672 pn533_send_complete, dev);
1673
1674 tasklet_init(&dev->tasklet, pn533_tasklet_cmd_complete, (ulong)dev);
1675
1676 usb_set_intfdata(interface, dev);
1677
1678 pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
1679 pn533_tx_frame_finish(dev->out_frame);
1680
1681 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1682 dev->in_maxlen);
1683 if (rc)
1684 goto kill_tasklet;
1685
1686 fw_ver = (struct pn533_fw_version *)
1687 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1688 nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
1689 " attached", fw_ver->ver, fw_ver->rev);
1690
1691 protocols = NFC_PROTO_JEWEL_MASK
1692 | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
1693 | NFC_PROTO_ISO14443_MASK
1694 | NFC_PROTO_NFC_DEP_MASK;
1695
e8753043
SO		 1696 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
1697 PN533_CMD_DATAEXCH_HEAD_LEN,
1698 PN533_FRAME_TAIL_SIZE);
c46ee386
AAJ		 1699 if (!dev->nfc_dev)
1700 goto kill_tasklet;
1701
1702 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
1703 nfc_set_drvdata(dev->nfc_dev, dev);
1704
1705 rc = nfc_register_device(dev->nfc_dev);
1706 if (rc)
1707 goto free_nfc_dev;
1708
1709 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
1710 max_retries.mx_rty_psl = 2;
1711 max_retries.mx_rty_passive_act = PN533_CONFIG_MAX_RETRIES_NO_RETRY;
1712
1713 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
1714 (u8 *) &max_retries, sizeof(max_retries));
1715
1716 if (rc) {
1717 nfc_dev_err(&dev->interface->dev, "Error on setting MAX_RETRIES"
1718 " config");
1719 goto free_nfc_dev;
1720 }
1721
1722 return 0;
1723
1724free_nfc_dev:
1725 nfc_free_device(dev->nfc_dev);
1726kill_tasklet:
1727 tasklet_kill(&dev->tasklet);
1728error:
1729 kfree(dev->in_frame);
1730 usb_free_urb(dev->in_urb);
1731 kfree(dev->out_frame);
1732 usb_free_urb(dev->out_urb);
1733 kfree(dev);
1734 return rc;
1735}
1736
1737static void pn533_disconnect(struct usb_interface *interface)
1738{
1739 struct pn533 *dev;
1740
1741 dev = usb_get_intfdata(interface);
1742 usb_set_intfdata(interface, NULL);
1743
1744 nfc_unregister_device(dev->nfc_dev);
1745 nfc_free_device(dev->nfc_dev);
1746
1747 usb_kill_urb(dev->in_urb);
1748 usb_kill_urb(dev->out_urb);
1749
1750 tasklet_kill(&dev->tasklet);
1751
1752 kfree(dev->in_frame);
1753 usb_free_urb(dev->in_urb);
1754 kfree(dev->out_frame);
1755 usb_free_urb(dev->out_urb);
1756 kfree(dev);
1757
276556db 1758 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 1759}
1760
1761static struct usb_driver pn533_driver = {
1762 .name = "pn533",
1763 .probe = pn533_probe,
1764 .disconnect = pn533_disconnect,
1765 .id_table = pn533_table,
1766};
1767
fe748483 1768module_usb_driver(pn533_driver);
c46ee386
AAJ		 1769
1770MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
1771 " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
1772MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
1773MODULE_VERSION(VERSION);
1774MODULE_LICENSE("GPL");
Linux kernel - Deliverables
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