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NFC: SN is not an invalid GT value
[linux-2.6-block.git] / drivers / nfc / pn533.c
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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
7975754f
SO		 786 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
787 nfc_tgt->sensf_res_len = 9;
788
c46ee386
AAJ		 789 return 0;
790}
791
792struct pn533_target_jewel {
793 __be16 sens_res;
794 u8 jewelid[4];
795} __packed;
796
797static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
798 int target_data_len)
799{
800 u8 ssd;
801 u8 platconf;
802
803 if (target_data_len < sizeof(struct pn533_target_jewel))
804 return false;
805
806 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
807 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
808 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
809
810 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
811 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
812 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
813 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
814 return false;
815
816 return true;
817}
818
819static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
820 int tgt_data_len)
821{
822 struct pn533_target_jewel *tgt_jewel;
823
824 tgt_jewel = (struct pn533_target_jewel *) tgt_data;
825
826 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
827 return -EPROTO;
828
829 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
830 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 831 nfc_tgt->nfcid1_len = 4;
832 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 833
834 return 0;
835}
836
837struct pn533_type_b_prot_info {
838 u8 bitrate;
839 u8 fsci_type;
840 u8 fwi_adc_fo;
841} __packed;
842
843#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
844#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
845#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
846
847struct pn533_type_b_sens_res {
848 u8 opcode;
849 u8 nfcid[4];
850 u8 appdata[4];
851 struct pn533_type_b_prot_info prot_info;
852} __packed;
853
854#define PN533_TYPE_B_OPC_SENSB_RES 0x50
855
856struct pn533_target_type_b {
857 struct pn533_type_b_sens_res sensb_res;
858 u8 attrib_res_len;
859 u8 attrib_res[];
860} __packed;
861
862static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
863 int target_data_len)
864{
865 if (target_data_len < sizeof(struct pn533_target_type_b))
866 return false;
867
868 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
869 return false;
870
871 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
872 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
873 return false;
874
875 return true;
876}
877
878static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
879 int tgt_data_len)
880{
881 struct pn533_target_type_b *tgt_type_b;
882
883 tgt_type_b = (struct pn533_target_type_b *) tgt_data;
884
885 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
886 return -EPROTO;
887
888 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
889
890 return 0;
891}
892
893struct pn533_poll_response {
894 u8 nbtg;
895 u8 tg;
896 u8 target_data[];
897} __packed;
898
899static int pn533_target_found(struct pn533 *dev,
900 struct pn533_poll_response *resp, int resp_len)
901{
902 int target_data_len;
903 struct nfc_target nfc_tgt;
904 int rc;
905
906 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
907 dev->poll_mod_curr);
908
909 if (resp->tg != 1)
910 return -EPROTO;
911
98b3ac1b
SO		 912 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
913
c46ee386
AAJ		 914 target_data_len = resp_len - sizeof(struct pn533_poll_response);
915
916 switch (dev->poll_mod_curr) {
917 case PN533_POLL_MOD_106KBPS_A:
918 rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
919 target_data_len);
920 break;
921 case PN533_POLL_MOD_212KBPS_FELICA:
922 case PN533_POLL_MOD_424KBPS_FELICA:
923 rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
924 target_data_len);
925 break;
926 case PN533_POLL_MOD_106KBPS_JEWEL:
927 rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
928 target_data_len);
929 break;
930 case PN533_POLL_MOD_847KBPS_B:
931 rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
932 target_data_len);
933 break;
934 default:
935 nfc_dev_err(&dev->interface->dev, "Unknown current poll"
936 " modulation");
937 return -EPROTO;
938 }
939
940 if (rc)
941 return rc;
942
943 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
944 nfc_dev_dbg(&dev->interface->dev, "The target found does not"
945 " have the desired protocol");
946 return -EAGAIN;
947 }
948
949 nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
950 "0x%x", nfc_tgt.supported_protocols);
951
952 dev->tgt_available_prots = nfc_tgt.supported_protocols;
953
954 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
955
956 return 0;
957}
958
959static void pn533_poll_reset_mod_list(struct pn533 *dev)
960{
961 dev->poll_mod_count = 0;
962}
963
964static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
965{
966 dev->poll_mod_active[dev->poll_mod_count] =
967 (struct pn533_poll_modulations *) &poll_mod[mod_index];
968 dev->poll_mod_count++;
969}
970
971static void pn533_poll_create_mod_list(struct pn533 *dev, u32 protocols)
972{
973 pn533_poll_reset_mod_list(dev);
974
975 if (protocols & NFC_PROTO_MIFARE_MASK
976 || protocols & NFC_PROTO_ISO14443_MASK
977 || protocols & NFC_PROTO_NFC_DEP_MASK)
978 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
979
980 if (protocols & NFC_PROTO_FELICA_MASK
981 || protocols & NFC_PROTO_NFC_DEP_MASK) {
982 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
983 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
984 }
985
986 if (protocols & NFC_PROTO_JEWEL_MASK)
987 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
988
989 if (protocols & NFC_PROTO_ISO14443_MASK)
990 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
991}
992
993static void pn533_start_poll_frame(struct pn533_frame *frame,
994 struct pn533_poll_modulations *mod)
995{
996
997 pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
998
999 memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
1000 frame->datalen += mod->len;
1001
1002 pn533_tx_frame_finish(frame);
1003}
1004
1005static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
1006 u8 *params, int params_len)
1007{
1008 struct pn533_poll_response *resp;
1009 struct pn533_poll_modulations *next_mod;
1010 int rc;
1011
1012 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1013
1014 if (params_len == -ENOENT) {
1015 nfc_dev_dbg(&dev->interface->dev, "Polling operation has been"
1016 " stopped");
1017 goto stop_poll;
1018 }
1019
1020 if (params_len < 0) {
1021 nfc_dev_err(&dev->interface->dev, "Error %d when running poll",
1022 params_len);
1023 goto stop_poll;
1024 }
1025
1026 resp = (struct pn533_poll_response *) params;
1027 if (resp->nbtg) {
1028 rc = pn533_target_found(dev, resp, params_len);
1029
1030 /* We must stop the poll after a valid target found */
1031 if (rc == 0)
1032 goto stop_poll;
1033
1034 if (rc != -EAGAIN)
1035 nfc_dev_err(&dev->interface->dev, "The target found is"
1036 " not valid - continuing to poll");
1037 }
1038
1039 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1040
1041 next_mod = dev->poll_mod_active[dev->poll_mod_curr];
1042
1043 nfc_dev_dbg(&dev->interface->dev, "Polling next modulation (0x%x)",
1044 dev->poll_mod_curr);
1045
1046 pn533_start_poll_frame(dev->out_frame, next_mod);
1047
1048 /* Don't need to down the semaphore again */
1049 rc = __pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1050 dev->in_maxlen, pn533_start_poll_complete,
1051 NULL, GFP_ATOMIC);
1052
1053 if (rc == -EPERM) {
1054 nfc_dev_dbg(&dev->interface->dev, "Cannot poll next modulation"
1055 " because poll has been stopped");
1056 goto stop_poll;
1057 }
1058
1059 if (rc) {
1060 nfc_dev_err(&dev->interface->dev, "Error %d when trying to poll"
1061 " next modulation", rc);
1062 goto stop_poll;
1063 }
1064
1065 /* Inform caller function to do not up the semaphore */
1066 return -EINPROGRESS;
1067
1068stop_poll:
1069 pn533_poll_reset_mod_list(dev);
1070 dev->poll_protocols = 0;
1071 return 0;
1072}
1073
1074static int pn533_start_poll(struct nfc_dev *nfc_dev, u32 protocols)
1075{
1076 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1077 struct pn533_poll_modulations *start_mod;
1078 int rc;
1079
1080 nfc_dev_dbg(&dev->interface->dev, "%s - protocols=0x%x", __func__,
1081 protocols);
1082
1083 if (dev->poll_mod_count) {
1084 nfc_dev_err(&dev->interface->dev, "Polling operation already"
1085 " active");
1086 return -EBUSY;
1087 }
1088
1089 if (dev->tgt_active_prot) {
1090 nfc_dev_err(&dev->interface->dev, "Cannot poll with a target"
1091 " already activated");
1092 return -EBUSY;
1093 }
1094
1095 pn533_poll_create_mod_list(dev, protocols);
1096
1097 if (!dev->poll_mod_count) {
1098 nfc_dev_err(&dev->interface->dev, "No valid protocols"
1099 " specified");
1100 rc = -EINVAL;
1101 goto error;
1102 }
1103
1104 nfc_dev_dbg(&dev->interface->dev, "It will poll %d modulations types",
1105 dev->poll_mod_count);
1106
1107 dev->poll_mod_curr = 0;
1108 start_mod = dev->poll_mod_active[dev->poll_mod_curr];
1109
1110 pn533_start_poll_frame(dev->out_frame, start_mod);
1111
1112 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1113 dev->in_maxlen, pn533_start_poll_complete,
1114 NULL, GFP_KERNEL);
1115
1116 if (rc) {
1117 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1118 " start poll", rc);
1119 goto error;
1120 }
1121
1122 dev->poll_protocols = protocols;
1123
1124 return 0;
1125
1126error:
1127 pn533_poll_reset_mod_list(dev);
1128 return rc;
1129}
1130
1131static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1132{
1133 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1134
1135 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1136
1137 if (!dev->poll_mod_count) {
1138 nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
1139 " running");
1140 return;
1141 }
1142
1143 /* An ack will cancel the last issued command (poll) */
1144 pn533_send_ack(dev, GFP_KERNEL);
1145
1146 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1147 usb_kill_urb(dev->in_urb);
1148}
1149
1150static int pn533_activate_target_nfcdep(struct pn533 *dev)
1151{
1152 struct pn533_cmd_activate_param param;
1153 struct pn533_cmd_activate_response *resp;
541d920b 1154 u16 gt_len;
c46ee386
AAJ		 1155 int rc;
1156
1157 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1158
1159 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
1160
1161 param.tg = 1;
1162 param.next = 0;
1163 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &param,
1164 sizeof(struct pn533_cmd_activate_param));
1165 dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
1166
1167 pn533_tx_frame_finish(dev->out_frame);
1168
1169 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1170 dev->in_maxlen);
1171 if (rc)
1172 return rc;
1173
1174 resp = (struct pn533_cmd_activate_response *)
1175 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1176 rc = resp->status & PN533_CMD_RET_MASK;
1177 if (rc != PN533_CMD_RET_SUCCESS)
1178 return -EIO;
1179
541d920b
SO		 1180 /* ATR_RES general bytes are located at offset 16 */
1181 gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
1182 rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
1183
1184 return rc;
c46ee386
AAJ		 1185}
1186
1187static int pn533_activate_target(struct nfc_dev *nfc_dev, u32 target_idx,
1188 u32 protocol)
1189{
1190 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1191 int rc;
1192
1193 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1194 protocol);
1195
1196 if (dev->poll_mod_count) {
1197 nfc_dev_err(&dev->interface->dev, "Cannot activate while"
1198 " polling");
1199 return -EBUSY;
1200 }
1201
1202 if (dev->tgt_active_prot) {
1203 nfc_dev_err(&dev->interface->dev, "There is already an active"
1204 " target");
1205 return -EBUSY;
1206 }
1207
1208 if (!dev->tgt_available_prots) {
1209 nfc_dev_err(&dev->interface->dev, "There is no available target"
1210 " to activate");
1211 return -EINVAL;
1212 }
1213
1214 if (!(dev->tgt_available_prots & (1 << protocol))) {
1215 nfc_dev_err(&dev->interface->dev, "The target does not support"
1216 " the requested protocol %u", protocol);
1217 return -EINVAL;
1218 }
1219
1220 if (protocol == NFC_PROTO_NFC_DEP) {
1221 rc = pn533_activate_target_nfcdep(dev);
1222 if (rc) {
1223 nfc_dev_err(&dev->interface->dev, "Error %d when"
1224 " activating target with"
1225 " NFC_DEP protocol", rc);
1226 return rc;
1227 }
1228 }
1229
1230 dev->tgt_active_prot = protocol;
1231 dev->tgt_available_prots = 0;
1232
1233 return 0;
1234}
1235
1236static void pn533_deactivate_target(struct nfc_dev *nfc_dev, u32 target_idx)
1237{
1238 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1239 u8 tg;
1240 u8 status;
1241 int rc;
1242
1243 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1244
1245 if (!dev->tgt_active_prot) {
1246 nfc_dev_err(&dev->interface->dev, "There is no active target");
1247 return;
1248 }
1249
1250 dev->tgt_active_prot = 0;
1251
1252 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
1253
1254 tg = 1;
1255 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
1256 dev->out_frame->datalen += sizeof(u8);
1257
1258 pn533_tx_frame_finish(dev->out_frame);
1259
1260 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1261 dev->in_maxlen);
1262 if (rc) {
1263 nfc_dev_err(&dev->interface->dev, "Error when sending release"
1264 " command to the controller");
1265 return;
1266 }
1267
1268 status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
1269 rc = status & PN533_CMD_RET_MASK;
1270 if (rc != PN533_CMD_RET_SUCCESS)
1271 nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
1272 " the target", rc);
1273
1274 return;
1275}
1276
361f3cb7
SO		 1277
1278static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
1279 u8 *params, int params_len)
1280{
1281 struct pn533_cmd_jump_dep *cmd;
1282 struct pn533_cmd_jump_dep_response *resp;
1283 struct nfc_target nfc_target;
1284 u8 target_gt_len;
1285 int rc;
1286
1287 if (params_len == -ENOENT) {
1288 nfc_dev_dbg(&dev->interface->dev, "");
1289 return 0;
1290 }
1291
1292 if (params_len < 0) {
1293 nfc_dev_err(&dev->interface->dev,
1294 "Error %d when bringing DEP link up",
1295 params_len);
1296 return 0;
1297 }
1298
1299 if (dev->tgt_available_prots &&
1300 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1301 nfc_dev_err(&dev->interface->dev,
1302 "The target does not support DEP");
1303 return -EINVAL;
1304 }
1305
1306 resp = (struct pn533_cmd_jump_dep_response *) params;
1307 cmd = (struct pn533_cmd_jump_dep *) arg;
1308 rc = resp->status & PN533_CMD_RET_MASK;
1309 if (rc != PN533_CMD_RET_SUCCESS) {
1310 nfc_dev_err(&dev->interface->dev,
1311 "Bringing DEP link up failed %d", rc);
1312 return 0;
1313 }
1314
1315 if (!dev->tgt_available_prots) {
1316 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1317
1318 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4
SO		 1319 nfc_target.nfcid1_len = 10;
1320 memcpy(nfc_target.nfcid1, resp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 1321 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1322 if (rc)
1323 return 0;
1324
1325 dev->tgt_available_prots = 0;
1326 }
1327
1328 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1329
1330 /* ATR_RES general bytes are located at offset 17 */
1331 target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17;
1332 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
1333 resp->gt, target_gt_len);
1334 if (rc == 0)
1335 rc = nfc_dep_link_is_up(dev->nfc_dev,
1336 dev->nfc_dev->targets[0].idx,
1337 !cmd->active, NFC_RF_INITIATOR);
1338
1339 return 0;
1340}
1341
1342static int pn533_dep_link_up(struct nfc_dev *nfc_dev, int target_idx,
1343 u8 comm_mode, u8 rf_mode)
1344{
1345 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1346 struct pn533_cmd_jump_dep *cmd;
1347 u8 cmd_len, local_gt_len, *local_gt;
1348 int rc;
1349
1350 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1351
1352 if (rf_mode == NFC_RF_TARGET) {
1353 nfc_dev_err(&dev->interface->dev, "Target mode not supported");
1354 return -EOPNOTSUPP;
1355 }
1356
1357
1358 if (dev->poll_mod_count) {
1359 nfc_dev_err(&dev->interface->dev,
1360 "Cannot bring the DEP link up while polling");
1361 return -EBUSY;
1362 }
1363
1364 if (dev->tgt_active_prot) {
1365 nfc_dev_err(&dev->interface->dev,
1366 "There is already an active target");
1367 return -EBUSY;
1368 }
1369
1370 local_gt = nfc_get_local_general_bytes(dev->nfc_dev, &local_gt_len);
1371 if (local_gt_len > NFC_MAX_GT_LEN)
1372 return -EINVAL;
1373
1374 cmd_len = sizeof(struct pn533_cmd_jump_dep) + local_gt_len;
1375 cmd = kzalloc(cmd_len, GFP_KERNEL);
1376 if (cmd == NULL)
1377 return -ENOMEM;
1378
1379 pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
1380
1381 cmd->active = !comm_mode;
1382 cmd->baud = 0;
1383 if (local_gt != NULL) {
1384 cmd->next = 4; /* We have some Gi */
1385 memcpy(cmd->gt, local_gt, local_gt_len);
1386 } else {
1387 cmd->next = 0;
1388 }
1389
1390 memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len);
1391 dev->out_frame->datalen += cmd_len;
1392
1393 pn533_tx_frame_finish(dev->out_frame);
1394
1395 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
1396 dev->in_maxlen, pn533_in_dep_link_up_complete,
1397 cmd, GFP_KERNEL);
1398 if (rc)
1399 goto out;
1400
1401
1402out:
1403 kfree(cmd);
1404
1405 return rc;
1406}
1407
1408static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
1409{
1410 pn533_deactivate_target(nfc_dev, 0);
1411
1412 return 0;
1413}
1414
c46ee386
AAJ		 1415#define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3)
1416#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1417
1418static int pn533_data_exchange_tx_frame(struct pn533 *dev, struct sk_buff *skb)
1419{
1420 int payload_len = skb->len;
1421 struct pn533_frame *out_frame;
c46ee386
AAJ		 1422 u8 tg;
1423
1424 nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__,
1425 payload_len);
1426
1427 if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
1428 /* TODO: Implement support to multi-part data exchange */
1429 nfc_dev_err(&dev->interface->dev, "Data length greater than the"
1430 " max allowed: %d",
1431 PN533_CMD_DATAEXCH_DATA_MAXLEN);
1432 return -ENOSYS;
1433 }
1434
c46ee386
AAJ		 1435 skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN);
1436 out_frame = (struct pn533_frame *) skb->data;
1437
1438 pn533_tx_frame_init(out_frame, PN533_CMD_IN_DATA_EXCHANGE);
1439
1440 tg = 1;
1441 memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame), &tg, sizeof(u8));
1442 out_frame->datalen += sizeof(u8);
1443
1444 /* The data is already in the out_frame, just update the datalen */
1445 out_frame->datalen += payload_len;
1446
1447 pn533_tx_frame_finish(out_frame);
1448 skb_put(skb, PN533_FRAME_TAIL_SIZE);
1449
1450 return 0;
1451}
1452
1453struct pn533_data_exchange_arg {
1454 struct sk_buff *skb_resp;
1455 struct sk_buff *skb_out;
1456 data_exchange_cb_t cb;
1457 void *cb_context;
1458};
1459
1460static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
1461 u8 *params, int params_len)
1462{
1463 struct pn533_data_exchange_arg *arg = _arg;
1464 struct sk_buff *skb_resp = arg->skb_resp;
1465 struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
1466 int err = 0;
1467 u8 status;
1468 u8 cmd_ret;
1469
1470 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1471
1472 dev_kfree_skb_irq(arg->skb_out);
1473
1474 if (params_len < 0) { /* error */
1475 err = params_len;
1476 goto error;
1477 }
1478
1479 skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
1480
1481 status = params[0];
1482
1483 cmd_ret = status & PN533_CMD_RET_MASK;
1484 if (cmd_ret != PN533_CMD_RET_SUCCESS) {
1485 nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when"
1486 " exchanging data", cmd_ret);
1487 err = -EIO;
1488 goto error;
1489 }
1490
1491 if (status & PN533_CMD_MI_MASK) {
1492 /* TODO: Implement support to multi-part data exchange */
1493 nfc_dev_err(&dev->interface->dev, "Multi-part message not yet"
1494 " supported");
1495 /* Prevent the other messages from controller */
1496 pn533_send_ack(dev, GFP_ATOMIC);
1497 err = -ENOSYS;
1498 goto error;
1499 }
1500
1501 skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
1502 skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
1503
1504 arg->cb(arg->cb_context, skb_resp, 0);
1505 kfree(arg);
1506 return 0;
1507
1508error:
1509 dev_kfree_skb_irq(skb_resp);
1510 arg->cb(arg->cb_context, NULL, err);
1511 kfree(arg);
1512 return 0;
1513}
1514
85eb28a3 1515static int pn533_data_exchange(struct nfc_dev *nfc_dev, u32 target_idx,
c46ee386
AAJ		 1516 struct sk_buff *skb,
1517 data_exchange_cb_t cb,
1518 void *cb_context)
1519{
1520 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1521 struct pn533_frame *out_frame, *in_frame;
1522 struct pn533_data_exchange_arg *arg;
1523 struct sk_buff *skb_resp;
1524 int skb_resp_len;
1525 int rc;
1526
1527 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1528
1529 if (!dev->tgt_active_prot) {
1530 nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
1531 " there is no active target");
1532 rc = -EINVAL;
1533 goto error;
1534 }
1535
1536 rc = pn533_data_exchange_tx_frame(dev, skb);
1537 if (rc)
1538 goto error;
1539
1540 skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
1541 PN533_CMD_DATAEXCH_DATA_MAXLEN +
1542 PN533_FRAME_TAIL_SIZE;
1543
7c7cd3bf 1544 skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
c46ee386
AAJ		 1545 if (!skb_resp) {
1546 rc = -ENOMEM;
1547 goto error;
1548 }
1549
1550 in_frame = (struct pn533_frame *) skb_resp->data;
1551 out_frame = (struct pn533_frame *) skb->data;
1552
1553 arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL);
1554 if (!arg) {
1555 rc = -ENOMEM;
1556 goto free_skb_resp;
1557 }
1558
1559 arg->skb_resp = skb_resp;
1560 arg->skb_out = skb;
1561 arg->cb = cb;
1562 arg->cb_context = cb_context;
1563
1564 rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len,
1565 pn533_data_exchange_complete, arg,
1566 GFP_KERNEL);
1567 if (rc) {
1568 nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
1569 " perform data_exchange", rc);
1570 goto free_arg;
1571 }
1572
1573 return 0;
1574
1575free_arg:
1576 kfree(arg);
1577free_skb_resp:
1578 kfree_skb(skb_resp);
1579error:
1580 kfree_skb(skb);
1581 return rc;
1582}
1583
1584static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
1585 u8 cfgdata_len)
1586{
1587 int rc;
1588 u8 *params;
1589
1590 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1591
1592 pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
1593
1594 params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
1595 params[0] = cfgitem;
1596 memcpy(&params[1], cfgdata, cfgdata_len);
1597 dev->out_frame->datalen += (1 + cfgdata_len);
1598
1599 pn533_tx_frame_finish(dev->out_frame);
1600
1601 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1602 dev->in_maxlen);
1603
1604 return rc;
1605}
1606
1607struct nfc_ops pn533_nfc_ops = {
8b3fe7b5
IE		 1608 .dev_up = NULL,
1609 .dev_down = NULL,
361f3cb7
SO		 1610 .dep_link_up = pn533_dep_link_up,
1611 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 1612 .start_poll = pn533_start_poll,
1613 .stop_poll = pn533_stop_poll,
1614 .activate_target = pn533_activate_target,
1615 .deactivate_target = pn533_deactivate_target,
1616 .data_exchange = pn533_data_exchange,
1617};
1618
1619static int pn533_probe(struct usb_interface *interface,
1620 const struct usb_device_id *id)
1621{
1622 struct pn533_fw_version *fw_ver;
1623 struct pn533 *dev;
1624 struct usb_host_interface *iface_desc;
1625 struct usb_endpoint_descriptor *endpoint;
1626 struct pn533_config_max_retries max_retries;
1627 int in_endpoint = 0;
1628 int out_endpoint = 0;
1629 int rc = -ENOMEM;
1630 int i;
1631 u32 protocols;
1632
1633 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
1634 if (!dev)
1635 return -ENOMEM;
1636
1637 dev->udev = usb_get_dev(interface_to_usbdev(interface));
1638 dev->interface = interface;
1639 sema_init(&dev->cmd_lock, 1);
1640
1641 iface_desc = interface->cur_altsetting;
1642 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
1643 endpoint = &iface_desc->endpoint[i].desc;
1644
1645 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
1646 dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize);
1647 in_endpoint = endpoint->bEndpointAddress;
1648 }
1649
1650 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) {
1651 dev->out_maxlen =
1652 le16_to_cpu(endpoint->wMaxPacketSize);
1653 out_endpoint = endpoint->bEndpointAddress;
1654 }
1655 }
1656
1657 if (!in_endpoint || !out_endpoint) {
1658 nfc_dev_err(&interface->dev, "Could not find bulk-in or"
1659 " bulk-out endpoint");
1660 rc = -ENODEV;
1661 goto error;
1662 }
1663
1664 dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
1665 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
1666 dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
1667 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
1668
1669 if (!dev->in_frame || !dev->out_frame ||
1670 !dev->in_urb || !dev->out_urb)
1671 goto error;
1672
1673 usb_fill_bulk_urb(dev->in_urb, dev->udev,
1674 usb_rcvbulkpipe(dev->udev, in_endpoint),
1675 NULL, 0, NULL, dev);
1676 usb_fill_bulk_urb(dev->out_urb, dev->udev,
1677 usb_sndbulkpipe(dev->udev, out_endpoint),
1678 NULL, 0,
1679 pn533_send_complete, dev);
1680
1681 tasklet_init(&dev->tasklet, pn533_tasklet_cmd_complete, (ulong)dev);
1682
1683 usb_set_intfdata(interface, dev);
1684
1685 pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
1686 pn533_tx_frame_finish(dev->out_frame);
1687
1688 rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
1689 dev->in_maxlen);
1690 if (rc)
1691 goto kill_tasklet;
1692
1693 fw_ver = (struct pn533_fw_version *)
1694 PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
1695 nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
1696 " attached", fw_ver->ver, fw_ver->rev);
1697
1698 protocols = NFC_PROTO_JEWEL_MASK
1699 | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
1700 | NFC_PROTO_ISO14443_MASK
1701 | NFC_PROTO_NFC_DEP_MASK;
1702
e8753043
SO		 1703 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
1704 PN533_CMD_DATAEXCH_HEAD_LEN,
1705 PN533_FRAME_TAIL_SIZE);
c46ee386
AAJ		 1706 if (!dev->nfc_dev)
1707 goto kill_tasklet;
1708
1709 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
1710 nfc_set_drvdata(dev->nfc_dev, dev);
1711
1712 rc = nfc_register_device(dev->nfc_dev);
1713 if (rc)
1714 goto free_nfc_dev;
1715
1716 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
1717 max_retries.mx_rty_psl = 2;
1718 max_retries.mx_rty_passive_act = PN533_CONFIG_MAX_RETRIES_NO_RETRY;
1719
1720 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
1721 (u8 *) &max_retries, sizeof(max_retries));
1722
1723 if (rc) {
1724 nfc_dev_err(&dev->interface->dev, "Error on setting MAX_RETRIES"
1725 " config");
1726 goto free_nfc_dev;
1727 }
1728
1729 return 0;
1730
1731free_nfc_dev:
1732 nfc_free_device(dev->nfc_dev);
1733kill_tasklet:
1734 tasklet_kill(&dev->tasklet);
1735error:
1736 kfree(dev->in_frame);
1737 usb_free_urb(dev->in_urb);
1738 kfree(dev->out_frame);
1739 usb_free_urb(dev->out_urb);
1740 kfree(dev);
1741 return rc;
1742}
1743
1744static void pn533_disconnect(struct usb_interface *interface)
1745{
1746 struct pn533 *dev;
1747
1748 dev = usb_get_intfdata(interface);
1749 usb_set_intfdata(interface, NULL);
1750
1751 nfc_unregister_device(dev->nfc_dev);
1752 nfc_free_device(dev->nfc_dev);
1753
1754 usb_kill_urb(dev->in_urb);
1755 usb_kill_urb(dev->out_urb);
1756
1757 tasklet_kill(&dev->tasklet);
1758
1759 kfree(dev->in_frame);
1760 usb_free_urb(dev->in_urb);
1761 kfree(dev->out_frame);
1762 usb_free_urb(dev->out_urb);
1763 kfree(dev);
1764
276556db 1765 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 1766}
1767
1768static struct usb_driver pn533_driver = {
1769 .name = "pn533",
1770 .probe = pn533_probe,
1771 .disconnect = pn533_disconnect,
1772 .id_table = pn533_table,
1773};
1774
fe748483 1775module_usb_driver(pn533_driver);
c46ee386
AAJ		 1776
1777MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
1778 " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
1779MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
1780MODULE_VERSION(VERSION);
1781MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)