projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFC: pn533: Del frame logic from Data Exchange cmd
[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
5c7b0531
SO		 41#define SONY_VENDOR_ID 0x054c
42#define PASORI_PRODUCT_ID 0x02e1
43
5c7b0531
SO		 44#define PN533_DEVICE_STD 0x1
45#define PN533_DEVICE_PASORI 0x2
46
01d719a2
SO		 47#define PN533_ALL_PROTOCOLS (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK |\
48 NFC_PROTO_FELICA_MASK | NFC_PROTO_ISO14443_MASK |\
49 NFC_PROTO_NFC_DEP_MASK |\
50 NFC_PROTO_ISO14443_B_MASK)
5c7b0531
SO		 51
52#define PN533_NO_TYPE_B_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
53 NFC_PROTO_MIFARE_MASK | \
54 NFC_PROTO_FELICA_MASK | \
01d719a2 55 NFC_PROTO_ISO14443_MASK | \
5c7b0531
SO		 56 NFC_PROTO_NFC_DEP_MASK)
57
c46ee386 58static const struct usb_device_id pn533_table[] = {
5c7b0531
SO		 59 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
60 .idVendor = PN533_VENDOR_ID,
61 .idProduct = PN533_PRODUCT_ID,
62 .driver_info = PN533_DEVICE_STD,
63 },
64 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
65 .idVendor = SCM_VENDOR_ID,
66 .idProduct = SCL3711_PRODUCT_ID,
67 .driver_info = PN533_DEVICE_STD,
68 },
69 { .match_flags = USB_DEVICE_ID_MATCH_DEVICE,
70 .idVendor = SONY_VENDOR_ID,
71 .idProduct = PASORI_PRODUCT_ID,
72 .driver_info = PN533_DEVICE_PASORI,
73 },
c46ee386
AAJ		 74 { }
75};
76MODULE_DEVICE_TABLE(usb, pn533_table);
77
6fbbdc16
SO		 78/* How much time we spend listening for initiators */
79#define PN533_LISTEN_TIME 2
80
c46ee386 81/* frame definitions */
82dec34d
WR		 82#define PN533_NORMAL_FRAME_MAX_LEN 262 /* 6 (PREAMBLE, SOF, LEN, LCS, TFI)
83 254 (DATA)
84 2 (DCS, postamble) */
b1bb290a
WR		 85#define PN533_FRAME_HEADER_LEN (sizeof(struct pn533_frame) \
86 + 2) /* data[0] TFI, data[1] CC */
87#define PN533_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/
82dec34d 88
15461aeb
WR		 89/*
90 * Max extended frame payload len, excluding TFI and CC
91 * which are already in PN533_FRAME_HEADER_LEN.
92 */
93#define PN533_FRAME_MAX_PAYLOAD_LEN 263
94
c46ee386 95#define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \
b1bb290a 96 PN533_FRAME_TAIL_LEN)
c46ee386
AAJ		 97#define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1)
98#define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen])
99#define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
100
101/* start of frame */
102#define PN533_SOF 0x00FF
103
104/* frame identifier: in/out/error */
105#define PN533_FRAME_IDENTIFIER(f) (f->data[0])
106#define PN533_DIR_OUT 0xD4
107#define PN533_DIR_IN 0xD5
108
109/* PN533 Commands */
110#define PN533_FRAME_CMD(f) (f->data[1])
111#define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2])
112#define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2)
113
114#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
115#define PN533_CMD_RF_CONFIGURATION 0x32
116#define PN533_CMD_IN_DATA_EXCHANGE 0x40
5c7b0531 117#define PN533_CMD_IN_COMM_THRU 0x42
c46ee386
AAJ		 118#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
119#define PN533_CMD_IN_ATR 0x50
120#define PN533_CMD_IN_RELEASE 0x52
361f3cb7 121#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
c46ee386 122
ad3823ce 123#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
103b34cf 124#define PN533_CMD_TG_GET_DATA 0x86
dadb06f2 125#define PN533_CMD_TG_SET_DATA 0x8e
aada17ac 126#define PN533_CMD_UNDEF 0xff
ad3823ce 127
c46ee386
AAJ		 128#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
129
130/* PN533 Return codes */
131#define PN533_CMD_RET_MASK 0x3F
132#define PN533_CMD_MI_MASK 0x40
133#define PN533_CMD_RET_SUCCESS 0x00
134
135struct pn533;
136
137typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg,
138 u8 *params, int params_len);
139
aada17ac
WR		 140typedef int (*pn533_send_async_complete_t) (struct pn533 *dev, void *arg,
141 struct sk_buff *resp);
142
c46ee386
AAJ		 143/* structs for pn533 commands */
144
145/* PN533_CMD_GET_FIRMWARE_VERSION */
146struct pn533_fw_version {
147 u8 ic;
148 u8 ver;
149 u8 rev;
150 u8 support;
151};
152
153/* PN533_CMD_RF_CONFIGURATION */
34a85bfc 154#define PN533_CFGITEM_TIMING 0x02
c46ee386 155#define PN533_CFGITEM_MAX_RETRIES 0x05
5c7b0531 156#define PN533_CFGITEM_PASORI 0x82
c46ee386 157
34a85bfc
SO		 158#define PN533_CONFIG_TIMING_102 0xb
159#define PN533_CONFIG_TIMING_204 0xc
160#define PN533_CONFIG_TIMING_409 0xd
161#define PN533_CONFIG_TIMING_819 0xe
162
c46ee386
AAJ		 163#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
164#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
165
166struct pn533_config_max_retries {
167 u8 mx_rty_atr;
168 u8 mx_rty_psl;
169 u8 mx_rty_passive_act;
170} __packed;
171
34a85bfc
SO		 172struct pn533_config_timing {
173 u8 rfu;
174 u8 atr_res_timeout;
175 u8 dep_timeout;
176} __packed;
177
c46ee386
AAJ		 178/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
179
180/* felica commands opcode */
181#define PN533_FELICA_OPC_SENSF_REQ 0
182#define PN533_FELICA_OPC_SENSF_RES 1
183/* felica SENSF_REQ parameters */
184#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
185#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
186#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
187#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
188
189/* type B initiator_data values */
190#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
191#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
192#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
193
194union pn533_cmd_poll_initdata {
195 struct {
196 u8 afi;
197 u8 polling_method;
198 } __packed type_b;
199 struct {
200 u8 opcode;
201 __be16 sc;
202 u8 rc;
203 u8 tsn;
204 } __packed felica;
205};
206
207/* Poll modulations */
208enum {
209 PN533_POLL_MOD_106KBPS_A,
210 PN533_POLL_MOD_212KBPS_FELICA,
211 PN533_POLL_MOD_424KBPS_FELICA,
212 PN533_POLL_MOD_106KBPS_JEWEL,
213 PN533_POLL_MOD_847KBPS_B,
6fbbdc16 214 PN533_LISTEN_MOD,
c46ee386
AAJ		 215
216 __PN533_POLL_MOD_AFTER_LAST,
217};
218#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
219
220struct pn533_poll_modulations {
221 struct {
222 u8 maxtg;
223 u8 brty;
224 union pn533_cmd_poll_initdata initiator_data;
225 } __packed data;
226 u8 len;
227};
228
229const struct pn533_poll_modulations poll_mod[] = {
230 [PN533_POLL_MOD_106KBPS_A] = {
231 .data = {
232 .maxtg = 1,
233 .brty = 0,
234 },
235 .len = 2,
236 },
237 [PN533_POLL_MOD_212KBPS_FELICA] = {
238 .data = {
239 .maxtg = 1,
240 .brty = 1,
241 .initiator_data.felica = {
242 .opcode = PN533_FELICA_OPC_SENSF_REQ,
243 .sc = PN533_FELICA_SENSF_SC_ALL,
244 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
245 .tsn = 0,
246 },
247 },
248 .len = 7,
249 },
250 [PN533_POLL_MOD_424KBPS_FELICA] = {
251 .data = {
252 .maxtg = 1,
253 .brty = 2,
254 .initiator_data.felica = {
255 .opcode = PN533_FELICA_OPC_SENSF_REQ,
256 .sc = PN533_FELICA_SENSF_SC_ALL,
257 .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
258 .tsn = 0,
259 },
260 },
261 .len = 7,
262 },
263 [PN533_POLL_MOD_106KBPS_JEWEL] = {
264 .data = {
265 .maxtg = 1,
266 .brty = 4,
267 },
268 .len = 2,
269 },
270 [PN533_POLL_MOD_847KBPS_B] = {
271 .data = {
272 .maxtg = 1,
273 .brty = 8,
274 .initiator_data.type_b = {
275 .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
276 .polling_method =
277 PN533_TYPE_B_POLL_METHOD_TIMESLOT,
278 },
279 },
280 .len = 3,
281 },
6fbbdc16
SO		 282 [PN533_LISTEN_MOD] = {
283 .len = 0,
284 },
c46ee386
AAJ		 285};
286
287/* PN533_CMD_IN_ATR */
288
c46ee386
AAJ		 289struct pn533_cmd_activate_response {
290 u8 status;
291 u8 nfcid3t[10];
292 u8 didt;
293 u8 bst;
294 u8 brt;
295 u8 to;
296 u8 ppt;
297 /* optional */
298 u8 gt[];
299} __packed;
300
361f3cb7
SO		 301struct pn533_cmd_jump_dep_response {
302 u8 status;
303 u8 tg;
304 u8 nfcid3t[10];
305 u8 didt;
306 u8 bst;
307 u8 brt;
308 u8 to;
309 u8 ppt;
310 /* optional */
311 u8 gt[];
312} __packed;
c46ee386 313
ad3823ce
SO		 314
315/* PN533_TG_INIT_AS_TARGET */
316#define PN533_INIT_TARGET_PASSIVE 0x1
317#define PN533_INIT_TARGET_DEP 0x2
318
fc40a8c1
SO		 319#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
320#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
321#define PN533_INIT_TARGET_RESP_DEP 0x4
322
ad3823ce
SO		 323struct pn533_cmd_init_target {
324 u8 mode;
325 u8 mifare[6];
326 u8 felica[18];
327 u8 nfcid3[10];
328 u8 gb_len;
329 u8 gb[];
330} __packed;
331
332struct pn533_cmd_init_target_response {
333 u8 mode;
334 u8 cmd[];
335} __packed;
336
c46ee386
AAJ		 337struct pn533 {
338 struct usb_device *udev;
339 struct usb_interface *interface;
340 struct nfc_dev *nfc_dev;
341
342 struct urb *out_urb;
c46ee386
AAJ		 343 struct pn533_frame *out_frame;
344
345 struct urb *in_urb;
c46ee386
AAJ		 346 struct pn533_frame *in_frame;
347
6ff73fd2
SO		 348 struct sk_buff_head resp_q;
349
4849f85e
SO		 350 struct workqueue_struct *wq;
351 struct work_struct cmd_work;
5d50b364 352 struct work_struct cmd_complete_work;
6fbbdc16 353 struct work_struct poll_work;
6ff73fd2 354 struct work_struct mi_work;
103b34cf 355 struct work_struct tg_work;
6fbbdc16 356 struct timer_list listen_timer;
4849f85e
SO		 357 struct pn533_frame *wq_in_frame;
358 int wq_in_error;
6fbbdc16 359 int cancel_listen;
c46ee386
AAJ		 360
361 pn533_cmd_complete_t cmd_complete;
362 void *cmd_complete_arg;
b1e666f5 363 void *cmd_complete_mi_arg;
0201ed03 364 struct mutex cmd_lock;
c46ee386
AAJ		 365 u8 cmd;
366
367 struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
368 u8 poll_mod_count;
369 u8 poll_mod_curr;
370 u32 poll_protocols;
6fbbdc16
SO		 371 u32 listen_protocols;
372
373 u8 *gb;
374 size_t gb_len;
c46ee386
AAJ		 375
376 u8 tgt_available_prots;
377 u8 tgt_active_prot;
51ad304c 378 u8 tgt_mode;
5c7b0531
SO		 379
380 u32 device_type;
5d50b364
SO		 381
382 struct list_head cmd_queue;
383 u8 cmd_pending;
384};
385
386struct pn533_cmd {
387 struct list_head queue;
388 struct pn533_frame *out_frame;
389 struct pn533_frame *in_frame;
390 int in_frame_len;
aada17ac
WR		 391 u8 cmd_code;
392 struct sk_buff *req;
393 struct sk_buff *resp;
5d50b364
SO		 394 pn533_cmd_complete_t cmd_complete;
395 void *arg;
c46ee386
AAJ		 396};
397
398struct pn533_frame {
399 u8 preamble;
400 __be16 start_frame;
401 u8 datalen;
402 u8 datalen_checksum;
403 u8 data[];
404} __packed;
405
406/* The rule: value + checksum = 0 */
407static inline u8 pn533_checksum(u8 value)
408{
409 return ~value + 1;
410}
411
412/* The rule: sum(data elements) + checksum = 0 */
413static u8 pn533_data_checksum(u8 *data, int datalen)
414{
415 u8 sum = 0;
416 int i;
417
418 for (i = 0; i < datalen; i++)
419 sum += data[i];
420
421 return pn533_checksum(sum);
422}
423
424/**
425 * pn533_tx_frame_ack - create a ack frame
426 * @frame: The frame to be set as ack
427 *
428 * Ack is different type of standard frame. As a standard frame, it has
429 * preamble and start_frame. However the checksum of this frame must fail,
430 * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test
431 * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack.
432 * After datalen_checksum field, the postamble is placed.
433 */
434static void pn533_tx_frame_ack(struct pn533_frame *frame)
435{
436 frame->preamble = 0;
437 frame->start_frame = cpu_to_be16(PN533_SOF);
438 frame->datalen = 0;
439 frame->datalen_checksum = 0xFF;
440 /* data[0] is used as postamble */
441 frame->data[0] = 0;
442}
443
444static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd)
445{
446 frame->preamble = 0;
447 frame->start_frame = cpu_to_be16(PN533_SOF);
448 PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT;
449 PN533_FRAME_CMD(frame) = cmd;
450 frame->datalen = 2;
451}
452
453static void pn533_tx_frame_finish(struct pn533_frame *frame)
454{
455 frame->datalen_checksum = pn533_checksum(frame->datalen);
456
457 PN533_FRAME_CHECKSUM(frame) =
458 pn533_data_checksum(frame->data, frame->datalen);
459
460 PN533_FRAME_POSTAMBLE(frame) = 0;
461}
462
463static bool pn533_rx_frame_is_valid(struct pn533_frame *frame)
464{
465 u8 checksum;
466
467 if (frame->start_frame != cpu_to_be16(PN533_SOF))
468 return false;
469
470 checksum = pn533_checksum(frame->datalen);
471 if (checksum != frame->datalen_checksum)
472 return false;
473
474 checksum = pn533_data_checksum(frame->data, frame->datalen);
475 if (checksum != PN533_FRAME_CHECKSUM(frame))
476 return false;
477
478 return true;
479}
480
481static bool pn533_rx_frame_is_ack(struct pn533_frame *frame)
482{
483 if (frame->start_frame != cpu_to_be16(PN533_SOF))
484 return false;
485
486 if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
487 return false;
488
489 return true;
490}
491
492static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
493{
494 return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
495}
496
4849f85e
SO		 497
498static void pn533_wq_cmd_complete(struct work_struct *work)
c46ee386 499{
5d50b364 500 struct pn533 *dev = container_of(work, struct pn533, cmd_complete_work);
4849f85e 501 struct pn533_frame *in_frame;
c46ee386
AAJ		 502 int rc;
503
4849f85e
SO		 504 in_frame = dev->wq_in_frame;
505
506 if (dev->wq_in_error)
c46ee386 507 rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
4849f85e 508 dev->wq_in_error);
c46ee386
AAJ		 509 else
510 rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
511 PN533_FRAME_CMD_PARAMS_PTR(in_frame),
512 PN533_FRAME_CMD_PARAMS_LEN(in_frame));
513
514 if (rc != -EINPROGRESS)
5d50b364 515 queue_work(dev->wq, &dev->cmd_work);
c46ee386
AAJ		 516}
517
518static void pn533_recv_response(struct urb *urb)
519{
520 struct pn533 *dev = urb->context;
521 struct pn533_frame *in_frame;
522
4849f85e 523 dev->wq_in_frame = NULL;
c46ee386
AAJ		 524
525 switch (urb->status) {
526 case 0:
527 /* success */
528 break;
529 case -ECONNRESET:
530 case -ENOENT:
531 case -ESHUTDOWN:
532 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
533 " status: %d", urb->status);
4849f85e
SO		 534 dev->wq_in_error = urb->status;
535 goto sched_wq;
c46ee386
AAJ		 536 default:
537 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
538 " %d", urb->status);
4849f85e
SO		 539 dev->wq_in_error = urb->status;
540 goto sched_wq;
c46ee386
AAJ		 541 }
542
543 in_frame = dev->in_urb->transfer_buffer;
544
545 if (!pn533_rx_frame_is_valid(in_frame)) {
546 nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
4849f85e
SO		 547 dev->wq_in_error = -EIO;
548 goto sched_wq;
c46ee386
AAJ		 549 }
550
551 if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
552 nfc_dev_err(&dev->interface->dev, "The received frame is not "
553 "response to the last command");
4849f85e
SO		 554 dev->wq_in_error = -EIO;
555 goto sched_wq;
c46ee386
AAJ		 556 }
557
558 nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
4849f85e
SO		 559 dev->wq_in_error = 0;
560 dev->wq_in_frame = in_frame;
c46ee386 561
4849f85e 562sched_wq:
5d50b364 563 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 564}
565
566static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
567{
568 dev->in_urb->complete = pn533_recv_response;
569
570 return usb_submit_urb(dev->in_urb, flags);
571}
572
573static void pn533_recv_ack(struct urb *urb)
574{
575 struct pn533 *dev = urb->context;
576 struct pn533_frame *in_frame;
577 int rc;
578
579 switch (urb->status) {
580 case 0:
581 /* success */
582 break;
583 case -ECONNRESET:
584 case -ENOENT:
585 case -ESHUTDOWN:
586 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
587 " status: %d", urb->status);
4849f85e
SO		 588 dev->wq_in_error = urb->status;
589 goto sched_wq;
c46ee386
AAJ		 590 default:
591 nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
592 " %d", urb->status);
4849f85e
SO		 593 dev->wq_in_error = urb->status;
594 goto sched_wq;
c46ee386
AAJ		 595 }
596
597 in_frame = dev->in_urb->transfer_buffer;
598
599 if (!pn533_rx_frame_is_ack(in_frame)) {
600 nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
4849f85e
SO		 601 dev->wq_in_error = -EIO;
602 goto sched_wq;
c46ee386
AAJ		 603 }
604
605 nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
606
607 rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
608 if (rc) {
609 nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with"
610 " result %d", rc);
4849f85e
SO		 611 dev->wq_in_error = rc;
612 goto sched_wq;
c46ee386
AAJ		 613 }
614
615 return;
616
4849f85e
SO		 617sched_wq:
618 dev->wq_in_frame = NULL;
5d50b364 619 queue_work(dev->wq, &dev->cmd_complete_work);
c46ee386
AAJ		 620}
621
622static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
623{
624 dev->in_urb->complete = pn533_recv_ack;
625
626 return usb_submit_urb(dev->in_urb, flags);
627}
628
629static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
630{
631 int rc;
632
633 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
634
635 pn533_tx_frame_ack(dev->out_frame);
636
637 dev->out_urb->transfer_buffer = dev->out_frame;
638 dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
639 rc = usb_submit_urb(dev->out_urb, flags);
640
641 return rc;
642}
643
644static int __pn533_send_cmd_frame_async(struct pn533 *dev,
645 struct pn533_frame *out_frame,
646 struct pn533_frame *in_frame,
647 int in_frame_len,
648 pn533_cmd_complete_t cmd_complete,
d94ea4f5 649 void *arg)
c46ee386
AAJ		 650{
651 int rc;
652
653 nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
654 PN533_FRAME_CMD(out_frame));
655
656 dev->cmd = PN533_FRAME_CMD(out_frame);
657 dev->cmd_complete = cmd_complete;
658 dev->cmd_complete_arg = arg;
659
660 dev->out_urb->transfer_buffer = out_frame;
661 dev->out_urb->transfer_buffer_length =
662 PN533_FRAME_SIZE(out_frame);
663
664 dev->in_urb->transfer_buffer = in_frame;
665 dev->in_urb->transfer_buffer_length = in_frame_len;
666
d94ea4f5 667 rc = usb_submit_urb(dev->out_urb, GFP_KERNEL);
c46ee386
AAJ		 668 if (rc)
669 return rc;
670
d94ea4f5 671 rc = pn533_submit_urb_for_ack(dev, GFP_KERNEL);
c46ee386
AAJ		 672 if (rc)
673 goto error;
674
675 return 0;
676
677error:
678 usb_unlink_urb(dev->out_urb);
679 return rc;
680}
681
aada17ac
WR		 682static void pn533_build_cmd_frame(u8 cmd_code, struct sk_buff *skb)
683{
684 struct pn533_frame *frame;
685 /* payload is already there, just update datalen */
686 int payload_len = skb->len;
687
688 skb_push(skb, PN533_FRAME_HEADER_LEN);
689 skb_put(skb, PN533_FRAME_TAIL_LEN);
690
691 frame = (struct pn533_frame *)skb->data;
692
693 pn533_tx_frame_init(frame, cmd_code);
694 frame->datalen += payload_len;
695 pn533_tx_frame_finish(frame);
696}
697
698struct pn533_send_async_complete_arg {
699 pn533_send_async_complete_t complete_cb;
700 void *complete_cb_context;
701 struct sk_buff *resp;
702 struct sk_buff *req;
703};
704
705static int pn533_send_async_complete(struct pn533 *dev, void *_arg, u8 *params,
706 int params_len)
707{
708 struct pn533_send_async_complete_arg *arg = _arg;
709
710 struct sk_buff *req = arg->req;
711 struct sk_buff *resp = arg->resp;
712
713 struct pn533_frame *frame = (struct pn533_frame *)resp->data;
714 int rc;
715
716 dev_kfree_skb(req);
717
718 if (params_len < 0) {
719 nfc_dev_err(&dev->interface->dev,
720 "Error %d when starting as a target",
721 params_len);
722
723 arg->complete_cb(dev, arg->complete_cb_context,
724 ERR_PTR(params_len));
725 rc = params_len;
726 dev_kfree_skb(resp);
727 goto out;
728 }
729
730 skb_put(resp, PN533_FRAME_SIZE(frame));
731 skb_pull(resp, PN533_FRAME_HEADER_LEN);
732 skb_trim(resp, resp->len - PN533_FRAME_TAIL_LEN);
733
734 rc = arg->complete_cb(dev, arg->complete_cb_context, resp);
735
736out:
737 kfree(arg);
738 return rc;
739}
740
741static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
742 struct sk_buff *req, struct sk_buff *resp,
743 int resp_len,
744 pn533_send_async_complete_t complete_cb,
745 void *complete_cb_context)
746{
747 struct pn533_cmd *cmd;
748 struct pn533_send_async_complete_arg *arg;
749 int rc = 0;
750
751 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
752
753 arg = kzalloc(sizeof(arg), GFP_KERNEL);
754 if (!arg)
755 return -ENOMEM;
756
757 arg->complete_cb = complete_cb;
758 arg->complete_cb_context = complete_cb_context;
759 arg->resp = resp;
760 arg->req = req;
761
762 pn533_build_cmd_frame(cmd_code, req);
763
764 mutex_lock(&dev->cmd_lock);
765
766 if (!dev->cmd_pending) {
767 rc = __pn533_send_cmd_frame_async(dev,
768 (struct pn533_frame *)req->data,
769 (struct pn533_frame *)resp->data,
770 resp_len, pn533_send_async_complete,
771 arg);
772 if (rc)
773 goto error;
774
775 dev->cmd_pending = 1;
776 goto unlock;
777 }
778
779 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
780
781 cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL);
782 if (!cmd) {
783 rc = -ENOMEM;
784 goto error;
785 }
786
787 INIT_LIST_HEAD(&cmd->queue);
788 cmd->cmd_code = cmd_code;
789 cmd->req = req;
790 cmd->resp = resp;
791 cmd->arg = arg;
792
793 list_add_tail(&cmd->queue, &dev->cmd_queue);
794
795 goto unlock;
796
797error:
798 kfree(arg);
799unlock:
800 mutex_unlock(&dev->cmd_lock);
801 return rc;
15461aeb
WR		 802}
803
804static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,
805 struct sk_buff *req,
806 pn533_send_async_complete_t complete_cb,
807 void *complete_cb_context)
808{
809 struct sk_buff *resp;
810 int rc;
811 int resp_len = PN533_FRAME_HEADER_LEN +
812 PN533_FRAME_MAX_PAYLOAD_LEN +
813 PN533_FRAME_TAIL_LEN;
814
815 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
816
817 resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);
818 if (!resp)
819 return -ENOMEM;
820
821 rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,
822 complete_cb_context);
823 if (rc)
824 dev_kfree_skb(resp);
825
826 return rc;
aada17ac
WR		 827}
828
829static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,
830 struct sk_buff *req,
831 pn533_send_async_complete_t complete_cb,
832 void *complete_cb_context)
833{
834 struct sk_buff *resp;
835 int rc;
836
837 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
838
839 resp = alloc_skb(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
840 if (!resp)
841 return -ENOMEM;
842
843 rc = __pn533_send_async(dev, cmd_code, req, resp,
844 PN533_NORMAL_FRAME_MAX_LEN,
845 complete_cb, complete_cb_context);
846 if (rc)
847 dev_kfree_skb(resp);
848
849 return rc;
850}
851
b1e666f5
WR		 852/*
853 * pn533_send_cmd_direct_async
854 *
855 * The function sends a piority cmd directly to the chip omiting the cmd
856 * queue. It's intended to be used by chaining mechanism of received responses
857 * where the host has to request every single chunk of data before scheduling
858 * next cmd from the queue.
859 */
860static int pn533_send_cmd_direct_async(struct pn533 *dev, u8 cmd_code,
861 struct sk_buff *req,
862 pn533_send_async_complete_t complete_cb,
863 void *complete_cb_context)
864{
865 struct pn533_send_async_complete_arg *arg;
866 struct sk_buff *resp;
867 int rc;
868 int resp_len = PN533_FRAME_HEADER_LEN +
869 PN533_FRAME_MAX_PAYLOAD_LEN +
870 PN533_FRAME_TAIL_LEN;
871
872 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
873
874 resp = alloc_skb(resp_len, GFP_KERNEL);
875 if (!resp)
876 return -ENOMEM;
877
878 arg = kzalloc(sizeof(arg), GFP_KERNEL);
879 if (!arg) {
880 dev_kfree_skb(resp);
881 return -ENOMEM;
882 }
883
884 arg->complete_cb = complete_cb;
885 arg->complete_cb_context = complete_cb_context;
886 arg->resp = resp;
887 arg->req = req;
888
889 pn533_build_cmd_frame(cmd_code, req);
890
891 rc = __pn533_send_cmd_frame_async(dev, (struct pn533_frame *)req->data,
892 (struct pn533_frame *)resp->data,
893 resp_len, pn533_send_async_complete,
894 arg);
895 if (rc < 0) {
896 dev_kfree_skb(resp);
897 kfree(arg);
898 }
899
900 return rc;
901}
902
5d50b364
SO		 903static void pn533_wq_cmd(struct work_struct *work)
904{
905 struct pn533 *dev = container_of(work, struct pn533, cmd_work);
906 struct pn533_cmd *cmd;
907
908 mutex_lock(&dev->cmd_lock);
909
910 if (list_empty(&dev->cmd_queue)) {
911 dev->cmd_pending = 0;
912 mutex_unlock(&dev->cmd_lock);
913 return;
914 }
915
916 cmd = list_first_entry(&dev->cmd_queue, struct pn533_cmd, queue);
917
60ad07ab
SJ		 918 list_del(&cmd->queue);
919
5d50b364
SO		 920 mutex_unlock(&dev->cmd_lock);
921
aada17ac
WR		 922 if (cmd->cmd_code != PN533_CMD_UNDEF)
923 __pn533_send_cmd_frame_async(dev,
924 (struct pn533_frame *)cmd->req->data,
925 (struct pn533_frame *)cmd->resp->data,
926 PN533_NORMAL_FRAME_MAX_LEN,
927 pn533_send_async_complete,
928 cmd->arg);
929 else
930 __pn533_send_cmd_frame_async(dev, cmd->out_frame, cmd->in_frame,
931 cmd->in_frame_len,
932 cmd->cmd_complete, cmd->arg);
5d50b364 933
5d50b364
SO		 934 kfree(cmd);
935}
936
c46ee386
AAJ		 937static int pn533_send_cmd_frame_async(struct pn533 *dev,
938 struct pn533_frame *out_frame,
939 struct pn533_frame *in_frame,
940 int in_frame_len,
941 pn533_cmd_complete_t cmd_complete,
d94ea4f5 942 void *arg)
c46ee386 943{
5d50b364 944 struct pn533_cmd *cmd;
ee5e8d81 945 int rc = 0;
c46ee386
AAJ		 946
947 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
948
5d50b364 949 mutex_lock(&dev->cmd_lock);
c46ee386 950
5d50b364
SO		 951 if (!dev->cmd_pending) {
952 rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
953 in_frame_len, cmd_complete,
d94ea4f5 954 arg);
5d50b364
SO		 955 if (!rc)
956 dev->cmd_pending = 1;
957
ee5e8d81 958 goto unlock;
5d50b364
SO		 959 }
960
961 nfc_dev_dbg(&dev->interface->dev, "%s Queueing command", __func__);
962
d94ea4f5 963 cmd = kzalloc(sizeof(struct pn533_cmd), GFP_KERNEL);
ee5e8d81
SJ		 964 if (!cmd) {
965 rc = -ENOMEM;
966 goto unlock;
967 }
5d50b364
SO		 968
969 INIT_LIST_HEAD(&cmd->queue);
970 cmd->out_frame = out_frame;
971 cmd->in_frame = in_frame;
972 cmd->in_frame_len = in_frame_len;
aada17ac 973 cmd->cmd_code = PN533_CMD_UNDEF;
5d50b364
SO		 974 cmd->cmd_complete = cmd_complete;
975 cmd->arg = arg;
5d50b364
SO		 976
977 list_add_tail(&cmd->queue, &dev->cmd_queue);
c46ee386 978
ee5e8d81 979unlock:
0201ed03 980 mutex_unlock(&dev->cmd_lock);
5d50b364 981
ee5e8d81 982 return rc;
c46ee386
AAJ		 983}
984
985struct pn533_sync_cmd_response {
94c5c156 986 struct sk_buff *resp;
c46ee386
AAJ		 987 struct completion done;
988};
989
94c5c156
WR		 990static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
991 struct sk_buff *resp)
992{
993 struct pn533_sync_cmd_response *arg = _arg;
994
995 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
996
997 arg->resp = resp;
998 complete(&arg->done);
999
1000 return 0;
1001}
1002
1003/* pn533_send_cmd_sync
1004 *
1005 * Please note the req parameter is freed inside the function to
1006 * limit a number of return value interpretations by the caller.
1007 *
1008 * 1. negative in case of error during TX path -> req should be freed
1009 *
1010 * 2. negative in case of error during RX path -> req should not be freed
1011 * as it's been already freed at the begining of RX path by
1012 * async_complete_cb.
1013 *
1014 * 3. valid pointer in case of succesfult RX path
1015 *
1016 * A caller has to check a return value with IS_ERR macro. If the test pass,
1017 * the returned pointer is valid.
1018 *
1019 * */
1020static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
1021 struct sk_buff *req)
1022{
1023 int rc;
1024 struct pn533_sync_cmd_response arg;
1025
1026 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1027
1028 init_completion(&arg.done);
1029
1030 rc = pn533_send_cmd_async(dev, cmd_code, req,
1031 pn533_send_sync_complete, &arg);
1032 if (rc) {
1033 dev_kfree_skb(req);
1034 return ERR_PTR(rc);
1035 }
1036
1037 wait_for_completion(&arg.done);
1038
1039 return arg.resp;
1040}
1041
c46ee386
AAJ		 1042static void pn533_send_complete(struct urb *urb)
1043{
1044 struct pn533 *dev = urb->context;
1045
1046 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1047
1048 switch (urb->status) {
1049 case 0:
1050 /* success */
1051 break;
1052 case -ECONNRESET:
1053 case -ENOENT:
1054 case -ESHUTDOWN:
1055 nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
1056 " status: %d", urb->status);
1057 break;
1058 default:
1059 nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:"
1060 " %d", urb->status);
1061 }
1062}
1063
d22b2db6
WR		 1064static struct sk_buff *pn533_alloc_skb(unsigned int size)
1065{
1066 struct sk_buff *skb;
1067
1068 skb = alloc_skb(PN533_FRAME_HEADER_LEN +
1069 size +
1070 PN533_FRAME_TAIL_LEN, GFP_KERNEL);
1071
1072 if (skb)
1073 skb_reserve(skb, PN533_FRAME_HEADER_LEN);
1074
1075 return skb;
1076}
1077
c46ee386
AAJ		 1078struct pn533_target_type_a {
1079 __be16 sens_res;
1080 u8 sel_res;
1081 u8 nfcid_len;
1082 u8 nfcid_data[];
1083} __packed;
1084
1085
1086#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
1087#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
1088#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
1089
1090#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
1091#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
1092
1093#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
1094#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
1095
1096#define PN533_TYPE_A_SEL_PROT_MIFARE 0
1097#define PN533_TYPE_A_SEL_PROT_ISO14443 1
1098#define PN533_TYPE_A_SEL_PROT_DEP 2
1099#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
1100
1101static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
1102 int target_data_len)
1103{
1104 u8 ssd;
1105 u8 platconf;
1106
1107 if (target_data_len < sizeof(struct pn533_target_type_a))
1108 return false;
1109
1110 /* The lenght check of nfcid[] and ats[] are not being performed because
1111 the values are not being used */
1112
1113 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1114 ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
1115 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
1116
1117 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1118 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1119 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1120 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1121 return false;
1122
1123 /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
1124 if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
1125 return false;
1126
1127 return true;
1128}
1129
1130static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
1131 int tgt_data_len)
1132{
1133 struct pn533_target_type_a *tgt_type_a;
1134
1135 tgt_type_a = (struct pn533_target_type_a *) tgt_data;
1136
1137 if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
1138 return -EPROTO;
1139
1140 switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
1141 case PN533_TYPE_A_SEL_PROT_MIFARE:
1142 nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
1143 break;
1144 case PN533_TYPE_A_SEL_PROT_ISO14443:
1145 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
1146 break;
1147 case PN533_TYPE_A_SEL_PROT_DEP:
1148 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1149 break;
1150 case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
1151 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
1152 NFC_PROTO_NFC_DEP_MASK;
1153 break;
1154 }
1155
1156 nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
1157 nfc_tgt->sel_res = tgt_type_a->sel_res;
c3b1e1e8
SO		 1158 nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
1159 memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1160
1161 return 0;
1162}
1163
1164struct pn533_target_felica {
1165 u8 pol_res;
1166 u8 opcode;
1167 u8 nfcid2[8];
1168 u8 pad[8];
1169 /* optional */
1170 u8 syst_code[];
1171} __packed;
1172
1173#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
1174#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
1175
1176static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
1177 int target_data_len)
1178{
1179 if (target_data_len < sizeof(struct pn533_target_felica))
1180 return false;
1181
1182 if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
1183 return false;
1184
1185 return true;
1186}
1187
1188static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
1189 int tgt_data_len)
1190{
1191 struct pn533_target_felica *tgt_felica;
1192
1193 tgt_felica = (struct pn533_target_felica *) tgt_data;
1194
1195 if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
1196 return -EPROTO;
1197
1198 if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 &&
1199 tgt_felica->nfcid2[1] ==
1200 PN533_FELICA_SENSF_NFCID2_DEP_B2)
1201 nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
1202 else
1203 nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
1204
7975754f
SO		 1205 memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
1206 nfc_tgt->sensf_res_len = 9;
1207
c46ee386
AAJ		 1208 return 0;
1209}
1210
1211struct pn533_target_jewel {
1212 __be16 sens_res;
1213 u8 jewelid[4];
1214} __packed;
1215
1216static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
1217 int target_data_len)
1218{
1219 u8 ssd;
1220 u8 platconf;
1221
1222 if (target_data_len < sizeof(struct pn533_target_jewel))
1223 return false;
1224
1225 /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
1226 ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
1227 platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
1228
1229 if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1230 platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
1231 (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
1232 platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
1233 return false;
1234
1235 return true;
1236}
1237
1238static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
1239 int tgt_data_len)
1240{
1241 struct pn533_target_jewel *tgt_jewel;
1242
1243 tgt_jewel = (struct pn533_target_jewel *) tgt_data;
1244
1245 if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
1246 return -EPROTO;
1247
1248 nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
1249 nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
d8dc1072
SO		 1250 nfc_tgt->nfcid1_len = 4;
1251 memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
c46ee386
AAJ		 1252
1253 return 0;
1254}
1255
1256struct pn533_type_b_prot_info {
1257 u8 bitrate;
1258 u8 fsci_type;
1259 u8 fwi_adc_fo;
1260} __packed;
1261
1262#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
1263#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
1264#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
1265
1266struct pn533_type_b_sens_res {
1267 u8 opcode;
1268 u8 nfcid[4];
1269 u8 appdata[4];
1270 struct pn533_type_b_prot_info prot_info;
1271} __packed;
1272
1273#define PN533_TYPE_B_OPC_SENSB_RES 0x50
1274
1275struct pn533_target_type_b {
1276 struct pn533_type_b_sens_res sensb_res;
1277 u8 attrib_res_len;
1278 u8 attrib_res[];
1279} __packed;
1280
1281static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
1282 int target_data_len)
1283{
1284 if (target_data_len < sizeof(struct pn533_target_type_b))
1285 return false;
1286
1287 if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
1288 return false;
1289
1290 if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
1291 PN533_TYPE_B_PROT_TYPE_RFU_MASK)
1292 return false;
1293
1294 return true;
1295}
1296
1297static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
1298 int tgt_data_len)
1299{
1300 struct pn533_target_type_b *tgt_type_b;
1301
1302 tgt_type_b = (struct pn533_target_type_b *) tgt_data;
1303
1304 if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
1305 return -EPROTO;
1306
01d719a2 1307 nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_B_MASK;
c46ee386
AAJ		 1308
1309 return 0;
1310}
1311
1312struct pn533_poll_response {
1313 u8 nbtg;
1314 u8 tg;
1315 u8 target_data[];
1316} __packed;
1317
1318static int pn533_target_found(struct pn533 *dev,
1319 struct pn533_poll_response *resp, int resp_len)
1320{
1321 int target_data_len;
1322 struct nfc_target nfc_tgt;
1323 int rc;
1324
1325 nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
1326 dev->poll_mod_curr);
1327
1328 if (resp->tg != 1)
1329 return -EPROTO;
1330
98b3ac1b
SO		 1331 memset(&nfc_tgt, 0, sizeof(struct nfc_target));
1332
c46ee386
AAJ		 1333 target_data_len = resp_len - sizeof(struct pn533_poll_response);
1334
1335 switch (dev->poll_mod_curr) {
1336 case PN533_POLL_MOD_106KBPS_A:
1337 rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
1338 target_data_len);
1339 break;
1340 case PN533_POLL_MOD_212KBPS_FELICA:
1341 case PN533_POLL_MOD_424KBPS_FELICA:
1342 rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
1343 target_data_len);
1344 break;
1345 case PN533_POLL_MOD_106KBPS_JEWEL:
1346 rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
1347 target_data_len);
1348 break;
1349 case PN533_POLL_MOD_847KBPS_B:
1350 rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
1351 target_data_len);
1352 break;
1353 default:
1354 nfc_dev_err(&dev->interface->dev, "Unknown current poll"
1355 " modulation");
1356 return -EPROTO;
1357 }
1358
1359 if (rc)
1360 return rc;
1361
1362 if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
1363 nfc_dev_dbg(&dev->interface->dev, "The target found does not"
1364 " have the desired protocol");
1365 return -EAGAIN;
1366 }
1367
1368 nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
1369 "0x%x", nfc_tgt.supported_protocols);
1370
1371 dev->tgt_available_prots = nfc_tgt.supported_protocols;
1372
1373 nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
1374
1375 return 0;
1376}
1377
6fbbdc16
SO		 1378static inline void pn533_poll_next_mod(struct pn533 *dev)
1379{
1380 dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
1381}
1382
c46ee386
AAJ		 1383static void pn533_poll_reset_mod_list(struct pn533 *dev)
1384{
1385 dev->poll_mod_count = 0;
1386}
1387
1388static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
1389{
1390 dev->poll_mod_active[dev->poll_mod_count] =
1391 (struct pn533_poll_modulations *) &poll_mod[mod_index];
1392 dev->poll_mod_count++;
1393}
1394
6fbbdc16
SO		 1395static void pn533_poll_create_mod_list(struct pn533 *dev,
1396 u32 im_protocols, u32 tm_protocols)
c46ee386
AAJ		 1397{
1398 pn533_poll_reset_mod_list(dev);
1399
6fbbdc16
SO		 1400 if (im_protocols & NFC_PROTO_MIFARE_MASK
1401 || im_protocols & NFC_PROTO_ISO14443_MASK
1402 || im_protocols & NFC_PROTO_NFC_DEP_MASK)
c46ee386
AAJ		 1403 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
1404
6fbbdc16
SO		 1405 if (im_protocols & NFC_PROTO_FELICA_MASK
1406 || im_protocols & NFC_PROTO_NFC_DEP_MASK) {
c46ee386
AAJ		 1407 pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
1408 pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
1409 }
1410
6fbbdc16 1411 if (im_protocols & NFC_PROTO_JEWEL_MASK)
c46ee386
AAJ		 1412 pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
1413
01d719a2 1414 if (im_protocols & NFC_PROTO_ISO14443_B_MASK)
c46ee386 1415 pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
c46ee386 1416
6fbbdc16
SO		 1417 if (tm_protocols)
1418 pn533_poll_add_mod(dev, PN533_LISTEN_MOD);
c46ee386
AAJ		 1419}
1420
ab34a181 1421static int pn533_start_poll_complete(struct pn533 *dev, u8 *params, int params_len)
c46ee386
AAJ		 1422{
1423 struct pn533_poll_response *resp;
c46ee386
AAJ		 1424 int rc;
1425
1426 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1427
c46ee386
AAJ		 1428 resp = (struct pn533_poll_response *) params;
1429 if (resp->nbtg) {
1430 rc = pn533_target_found(dev, resp, params_len);
1431
1432 /* We must stop the poll after a valid target found */
6fbbdc16
SO		 1433 if (rc == 0) {
1434 pn533_poll_reset_mod_list(dev);
1435 return 0;
1436 }
c46ee386
AAJ		 1437 }
1438
6fbbdc16 1439 return -EAGAIN;
c46ee386
AAJ		 1440}
1441
ad3823ce
SO		 1442static int pn533_init_target_frame(struct pn533_frame *frame,
1443 u8 *gb, size_t gb_len)
1444{
1445 struct pn533_cmd_init_target *cmd;
1446 size_t cmd_len;
51d9e803
SO		 1447 u8 felica_params[18] = {0x1, 0xfe, /* DEP */
1448 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, /* random */
1449 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0,
1450 0xff, 0xff}; /* System code */
1451 u8 mifare_params[6] = {0x1, 0x1, /* SENS_RES */
1452 0x0, 0x0, 0x0,
1453 0x40}; /* SEL_RES for DEP */
ad3823ce
SO		 1454
1455 cmd_len = sizeof(struct pn533_cmd_init_target) + gb_len + 1;
1456 cmd = kzalloc(cmd_len, GFP_KERNEL);
1457 if (cmd == NULL)
1458 return -ENOMEM;
1459
1460 pn533_tx_frame_init(frame, PN533_CMD_TG_INIT_AS_TARGET);
1461
1462 /* DEP support only */
1463 cmd->mode |= PN533_INIT_TARGET_DEP;
51d9e803
SO		 1464
1465 /* Felica params */
1466 memcpy(cmd->felica, felica_params, 18);
1467 get_random_bytes(cmd->felica + 2, 6);
1468
1469 /* NFCID3 */
1470 memset(cmd->nfcid3, 0, 10);
1471 memcpy(cmd->nfcid3, cmd->felica, 8);
1472
1473 /* MIFARE params */
1474 memcpy(cmd->mifare, mifare_params, 6);
1475
1476 /* General bytes */
ad3823ce
SO		 1477 cmd->gb_len = gb_len;
1478 memcpy(cmd->gb, gb, gb_len);
51d9e803 1479
ad3823ce
SO		 1480 /* Len Tk */
1481 cmd->gb[gb_len] = 0;
1482
1483 memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), cmd, cmd_len);
51d9e803 1484
ad3823ce
SO		 1485 frame->datalen += cmd_len;
1486
1487 pn533_tx_frame_finish(frame);
1488
51d9e803
SO		 1489 kfree(cmd);
1490
ad3823ce
SO		 1491 return 0;
1492}
1493
b1bb290a 1494#define PN533_CMD_DATAEXCH_HEAD_LEN 1
103b34cf
SO		 1495#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
1496static int pn533_tm_get_data_complete(struct pn533 *dev, void *arg,
e4878823 1497 struct sk_buff *resp)
103b34cf 1498{
e4878823 1499 u8 status;
103b34cf
SO		 1500
1501 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1502
e4878823
WR		 1503 if (IS_ERR(resp))
1504 return PTR_ERR(resp);
103b34cf 1505
e4878823
WR		 1506 status = resp->data[0];
1507 skb_pull(resp, sizeof(status));
103b34cf 1508
e4878823 1509 if (status != 0) {
103b34cf 1510 nfc_tm_deactivated(dev->nfc_dev);
51ad304c 1511 dev->tgt_mode = 0;
e4878823 1512 dev_kfree_skb(resp);
103b34cf
SO		 1513 return 0;
1514 }
1515
e4878823 1516 return nfc_tm_data_received(dev->nfc_dev, resp);
103b34cf
SO		 1517}
1518
1519static void pn533_wq_tg_get_data(struct work_struct *work)
1520{
1521 struct pn533 *dev = container_of(work, struct pn533, tg_work);
103b34cf 1522
e4878823
WR		 1523 struct sk_buff *skb;
1524 int rc;
103b34cf 1525
e4878823 1526 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
103b34cf 1527
e4878823
WR		 1528 skb = pn533_alloc_skb(0);
1529 if (!skb)
103b34cf
SO		 1530 return;
1531
e4878823
WR		 1532 rc = pn533_send_data_async(dev, PN533_CMD_TG_GET_DATA, skb,
1533 pn533_tm_get_data_complete, NULL);
103b34cf 1534
e4878823
WR		 1535 if (rc < 0)
1536 dev_kfree_skb(skb);
103b34cf
SO		 1537
1538 return;
1539}
1540
fc40a8c1 1541#define ATR_REQ_GB_OFFSET 17
ab34a181 1542static int pn533_init_target_complete(struct pn533 *dev, u8 *params, int params_len)
fe7c5800 1543{
ad3823ce 1544 struct pn533_cmd_init_target_response *resp;
fc40a8c1
SO		 1545 u8 frame, comm_mode = NFC_COMM_PASSIVE, *gb;
1546 size_t gb_len;
103b34cf 1547 int rc;
ad3823ce
SO		 1548
1549 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1550
1551 if (params_len < 0) {
1552 nfc_dev_err(&dev->interface->dev,
1553 "Error %d when starting as a target",
1554 params_len);
1555
1556 return params_len;
1557 }
1558
fc40a8c1
SO		 1559 if (params_len < ATR_REQ_GB_OFFSET + 1)
1560 return -EINVAL;
1561
ad3823ce
SO		 1562 resp = (struct pn533_cmd_init_target_response *) params;
1563
fc40a8c1
SO		 1564 nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x param len %d\n",
1565 resp->mode, params_len);
ad3823ce 1566
fc40a8c1
SO		 1567 frame = resp->mode & PN533_INIT_TARGET_RESP_FRAME_MASK;
1568 if (frame == PN533_INIT_TARGET_RESP_ACTIVE)
1569 comm_mode = NFC_COMM_ACTIVE;
1570
1571 /* Again, only DEP */
1572 if ((resp->mode & PN533_INIT_TARGET_RESP_DEP) == 0)
1573 return -EOPNOTSUPP;
1574
1575 gb = resp->cmd + ATR_REQ_GB_OFFSET;
1576 gb_len = params_len - (ATR_REQ_GB_OFFSET + 1);
1577
103b34cf
SO		 1578 rc = nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
1579 comm_mode, gb, gb_len);
1580 if (rc < 0) {
1581 nfc_dev_err(&dev->interface->dev,
1582 "Error when signaling target activation");
1583 return rc;
1584 }
1585
51ad304c
SO		 1586 dev->tgt_mode = 1;
1587
103b34cf
SO		 1588 queue_work(dev->wq, &dev->tg_work);
1589
1590 return 0;
fe7c5800
SO		 1591}
1592
6fbbdc16 1593static void pn533_listen_mode_timer(unsigned long data)
ad3823ce 1594{
6fbbdc16
SO		 1595 struct pn533 *dev = (struct pn533 *) data;
1596
1597 nfc_dev_dbg(&dev->interface->dev, "Listen mode timeout");
1598
1599 /* An ack will cancel the last issued command (poll) */
1600 pn533_send_ack(dev, GFP_ATOMIC);
1601
1602 dev->cancel_listen = 1;
1603
6fbbdc16
SO		 1604 pn533_poll_next_mod(dev);
1605
1606 queue_work(dev->wq, &dev->poll_work);
1607}
1608
1609static int pn533_poll_complete(struct pn533 *dev, void *arg,
1610 u8 *params, int params_len)
1611{
1612 struct pn533_poll_modulations *cur_mod;
ad3823ce
SO		 1613 int rc;
1614
6fbbdc16 1615 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
ad3823ce 1616
6fbbdc16
SO		 1617 if (params_len == -ENOENT) {
1618 if (dev->poll_mod_count != 0)
1619 return 0;
ad3823ce 1620
6fbbdc16
SO		 1621 nfc_dev_err(&dev->interface->dev,
1622 "Polling operation has been stopped");
ad3823ce 1623
6fbbdc16
SO		 1624 goto stop_poll;
1625 }
ad3823ce 1626
6fbbdc16 1627 if (params_len < 0) {
ad3823ce 1628 nfc_dev_err(&dev->interface->dev,
6fbbdc16 1629 "Error %d when running poll", params_len);
ad3823ce 1630
6fbbdc16
SO		 1631 goto stop_poll;
1632 }
ad3823ce 1633
6fbbdc16
SO		 1634 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1635
1636 if (cur_mod->len == 0) {
1637 del_timer(&dev->listen_timer);
1638
ab34a181 1639 return pn533_init_target_complete(dev, params, params_len);
6fbbdc16 1640 } else {
ab34a181 1641 rc = pn533_start_poll_complete(dev, params, params_len);
6fbbdc16
SO		 1642 if (!rc)
1643 return rc;
1644 }
1645
1646 pn533_poll_next_mod(dev);
1647
1648 queue_work(dev->wq, &dev->poll_work);
1649
1650 return 0;
1651
1652stop_poll:
1653 pn533_poll_reset_mod_list(dev);
1654 dev->poll_protocols = 0;
1655 return 0;
ad3823ce
SO		 1656}
1657
6fbbdc16
SO		 1658static void pn533_build_poll_frame(struct pn533 *dev,
1659 struct pn533_frame *frame,
1660 struct pn533_poll_modulations *mod)
c46ee386 1661{
6fbbdc16 1662 nfc_dev_dbg(&dev->interface->dev, "mod len %d\n", mod->len);
c46ee386 1663
6fbbdc16
SO		 1664 if (mod->len == 0) {
1665 /* Listen mode */
1666 pn533_init_target_frame(frame, dev->gb, dev->gb_len);
1667 } else {
1668 /* Polling mode */
1669 pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
c46ee386 1670
6fbbdc16
SO		 1671 memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
1672 frame->datalen += mod->len;
c46ee386 1673
6fbbdc16 1674 pn533_tx_frame_finish(frame);
c46ee386 1675 }
6fbbdc16 1676}
c46ee386 1677
6fbbdc16
SO		 1678static int pn533_send_poll_frame(struct pn533 *dev)
1679{
1680 struct pn533_poll_modulations *cur_mod;
1681 int rc;
c46ee386 1682
6fbbdc16 1683 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
c46ee386 1684
6fbbdc16 1685 pn533_build_poll_frame(dev, dev->out_frame, cur_mod);
c46ee386
AAJ		 1686
1687 rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
8d25ca79
WR		 1688 PN533_NORMAL_FRAME_MAX_LEN,
1689 pn533_poll_complete,
d94ea4f5 1690 NULL);
6fbbdc16
SO		 1691 if (rc)
1692 nfc_dev_err(&dev->interface->dev, "Polling loop error %d", rc);
c46ee386 1693
6fbbdc16
SO		 1694 return rc;
1695}
1696
1697static void pn533_wq_poll(struct work_struct *work)
1698{
1699 struct pn533 *dev = container_of(work, struct pn533, poll_work);
1700 struct pn533_poll_modulations *cur_mod;
1701 int rc;
1702
1703 cur_mod = dev->poll_mod_active[dev->poll_mod_curr];
1704
1705 nfc_dev_dbg(&dev->interface->dev,
1706 "%s cancel_listen %d modulation len %d",
1707 __func__, dev->cancel_listen, cur_mod->len);
1708
1709 if (dev->cancel_listen == 1) {
1710 dev->cancel_listen = 0;
1711 usb_kill_urb(dev->in_urb);
c46ee386
AAJ		 1712 }
1713
6fbbdc16
SO		 1714 rc = pn533_send_poll_frame(dev);
1715 if (rc)
1716 return;
c46ee386 1717
6fbbdc16
SO		 1718 if (cur_mod->len == 0 && dev->poll_mod_count > 1)
1719 mod_timer(&dev->listen_timer, jiffies + PN533_LISTEN_TIME * HZ);
c46ee386 1720
6fbbdc16 1721 return;
c46ee386
AAJ		 1722}
1723
fe7c5800
SO		 1724static int pn533_start_poll(struct nfc_dev *nfc_dev,
1725 u32 im_protocols, u32 tm_protocols)
1726{
1727 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1728
1729 nfc_dev_dbg(&dev->interface->dev,
1730 "%s: im protocols 0x%x tm protocols 0x%x",
1731 __func__, im_protocols, tm_protocols);
1732
1733 if (dev->tgt_active_prot) {
1734 nfc_dev_err(&dev->interface->dev,
1735 "Cannot poll with a target already activated");
1736 return -EBUSY;
1737 }
1738
51ad304c
SO		 1739 if (dev->tgt_mode) {
1740 nfc_dev_err(&dev->interface->dev,
1741 "Cannot poll while already being activated");
1742 return -EBUSY;
1743 }
1744
6fbbdc16
SO		 1745 if (tm_protocols) {
1746 dev->gb = nfc_get_local_general_bytes(nfc_dev, &dev->gb_len);
1747 if (dev->gb == NULL)
1748 tm_protocols = 0;
1749 }
ad3823ce 1750
6fbbdc16
SO		 1751 dev->poll_mod_curr = 0;
1752 pn533_poll_create_mod_list(dev, im_protocols, tm_protocols);
1753 dev->poll_protocols = im_protocols;
1754 dev->listen_protocols = tm_protocols;
ad3823ce 1755
6fbbdc16 1756 return pn533_send_poll_frame(dev);
fe7c5800
SO		 1757}
1758
c46ee386
AAJ		 1759static void pn533_stop_poll(struct nfc_dev *nfc_dev)
1760{
1761 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1762
1763 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1764
6fbbdc16
SO		 1765 del_timer(&dev->listen_timer);
1766
c46ee386
AAJ		 1767 if (!dev->poll_mod_count) {
1768 nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
1769 " running");
1770 return;
1771 }
1772
1773 /* An ack will cancel the last issued command (poll) */
1774 pn533_send_ack(dev, GFP_KERNEL);
1775
1776 /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
1777 usb_kill_urb(dev->in_urb);
7c2a04a9
SO		 1778
1779 pn533_poll_reset_mod_list(dev);
c46ee386
AAJ		 1780}
1781
1782static int pn533_activate_target_nfcdep(struct pn533 *dev)
1783{
cb950d93 1784 struct pn533_cmd_activate_response *rsp;
541d920b 1785 u16 gt_len;
c46ee386
AAJ		 1786 int rc;
1787
cb950d93
WR		 1788 struct sk_buff *skb;
1789 struct sk_buff *resp;
c46ee386 1790
cb950d93 1791 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
c46ee386 1792
cb950d93
WR		 1793 skb = pn533_alloc_skb(sizeof(u8) * 2); /*TG + Next*/
1794 if (!skb)
1795 return -ENOMEM;
c46ee386 1796
cb950d93
WR		 1797 *skb_put(skb, sizeof(u8)) = 1; /* TG */
1798 *skb_put(skb, sizeof(u8)) = 0; /* Next */
c46ee386 1799
cb950d93
WR		 1800 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
1801 if (IS_ERR(resp))
1802 return PTR_ERR(resp);
c46ee386 1803
cb950d93
WR		 1804 rsp = (struct pn533_cmd_activate_response *) resp->data;
1805 rc = rsp->status & PN533_CMD_RET_MASK;
c46ee386 1806 if (rc != PN533_CMD_RET_SUCCESS)
cb950d93 1807 dev_kfree_skb(resp);
c46ee386
AAJ		 1808 return -EIO;
1809
541d920b 1810 /* ATR_RES general bytes are located at offset 16 */
cb950d93
WR		 1811 gt_len = resp->len - 16;
1812 rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
541d920b 1813
cb950d93 1814 dev_kfree_skb(resp);
541d920b 1815 return rc;
c46ee386
AAJ		 1816}
1817
90099433
EL		 1818static int pn533_activate_target(struct nfc_dev *nfc_dev,
1819 struct nfc_target *target, u32 protocol)
c46ee386
AAJ		 1820{
1821 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
1822 int rc;
1823
1824 nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
1825 protocol);
1826
1827 if (dev->poll_mod_count) {
1828 nfc_dev_err(&dev->interface->dev, "Cannot activate while"
1829 " polling");
1830 return -EBUSY;
1831 }
1832
1833 if (dev->tgt_active_prot) {
1834 nfc_dev_err(&dev->interface->dev, "There is already an active"
1835 " target");
1836 return -EBUSY;
1837 }
1838
1839 if (!dev->tgt_available_prots) {
1840 nfc_dev_err(&dev->interface->dev, "There is no available target"
1841 " to activate");
1842 return -EINVAL;
1843 }
1844
1845 if (!(dev->tgt_available_prots & (1 << protocol))) {
1846 nfc_dev_err(&dev->interface->dev, "The target does not support"
1847 " the requested protocol %u", protocol);
1848 return -EINVAL;
1849 }
1850
1851 if (protocol == NFC_PROTO_NFC_DEP) {
1852 rc = pn533_activate_target_nfcdep(dev);
1853 if (rc) {
1854 nfc_dev_err(&dev->interface->dev, "Error %d when"
1855 " activating target with"
1856 " NFC_DEP protocol", rc);
1857 return rc;
1858 }
1859 }
1860
1861 dev->tgt_active_prot = protocol;
1862 dev->tgt_available_prots = 0;
1863
1864 return 0;
1865}
1866
90099433
EL		 1867static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
1868 struct nfc_target *target)
c46ee386
AAJ		 1869{
1870 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
cb950d93
WR		 1871
1872 struct sk_buff *skb;
1873 struct sk_buff *resp;
1874
c46ee386
AAJ		 1875 int rc;
1876
1877 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1878
1879 if (!dev->tgt_active_prot) {
1880 nfc_dev_err(&dev->interface->dev, "There is no active target");
1881 return;
1882 }
1883
1884 dev->tgt_active_prot = 0;
6ff73fd2
SO		 1885 skb_queue_purge(&dev->resp_q);
1886
cb950d93
WR		 1887 skb = pn533_alloc_skb(sizeof(u8));
1888 if (!skb)
1889 return;
c46ee386 1890
cb950d93 1891 *skb_put(skb, 1) = 1; /* TG*/
c46ee386 1892
cb950d93
WR		 1893 resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
1894 if (IS_ERR(resp))
c46ee386 1895 return;
c46ee386 1896
cb950d93 1897 rc = resp->data[0] & PN533_CMD_RET_MASK;
c46ee386
AAJ		 1898 if (rc != PN533_CMD_RET_SUCCESS)
1899 nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
1900 " the target", rc);
1901
cb950d93 1902 dev_kfree_skb(resp);
c46ee386
AAJ		 1903 return;
1904}
1905
361f3cb7
SO		 1906
1907static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
13003649 1908 struct sk_buff *resp)
361f3cb7 1909{
13003649 1910 struct pn533_cmd_jump_dep_response *rsp;
361f3cb7
SO		 1911 u8 target_gt_len;
1912 int rc;
13003649 1913 u8 active = *(u8 *)arg;
70418e6e
WR		 1914
1915 kfree(arg);
361f3cb7 1916
13003649
WR		 1917 if (IS_ERR(resp))
1918 return PTR_ERR(resp);
361f3cb7
SO		 1919
1920 if (dev->tgt_available_prots &&
1921 !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
1922 nfc_dev_err(&dev->interface->dev,
1923 "The target does not support DEP");
13003649
WR		 1924 rc = -EINVAL;
1925 goto error;
361f3cb7
SO		 1926 }
1927
13003649
WR		 1928 rsp = (struct pn533_cmd_jump_dep_response *)resp->data;
1929
1930 rc = rsp->status & PN533_CMD_RET_MASK;
361f3cb7
SO		 1931 if (rc != PN533_CMD_RET_SUCCESS) {
1932 nfc_dev_err(&dev->interface->dev,
1933 "Bringing DEP link up failed %d", rc);
13003649 1934 goto error;
361f3cb7
SO		 1935 }
1936
1937 if (!dev->tgt_available_prots) {
13003649
WR		 1938 struct nfc_target nfc_target;
1939
361f3cb7
SO		 1940 nfc_dev_dbg(&dev->interface->dev, "Creating new target");
1941
1942 nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
2fbabfa4 1943 nfc_target.nfcid1_len = 10;
13003649 1944 memcpy(nfc_target.nfcid1, rsp->nfcid3t, nfc_target.nfcid1_len);
361f3cb7
SO		 1945 rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
1946 if (rc)
13003649 1947 goto error;
361f3cb7
SO		 1948
1949 dev->tgt_available_prots = 0;
1950 }
1951
1952 dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
1953
1954 /* ATR_RES general bytes are located at offset 17 */
13003649 1955 target_gt_len = resp->len - 17;
361f3cb7 1956 rc = nfc_set_remote_general_bytes(dev->nfc_dev,
13003649 1957 rsp->gt, target_gt_len);
361f3cb7
SO		 1958 if (rc == 0)
1959 rc = nfc_dep_link_is_up(dev->nfc_dev,
13003649
WR		 1960 dev->nfc_dev->targets[0].idx,
1961 !active, NFC_RF_INITIATOR);
361f3cb7 1962
13003649
WR		 1963error:
1964 dev_kfree_skb(resp);
1965 return rc;
361f3cb7
SO		 1966}
1967
41a8ec49
SO		 1968static int pn533_mod_to_baud(struct pn533 *dev)
1969{
1970 switch (dev->poll_mod_curr) {
1971 case PN533_POLL_MOD_106KBPS_A:
1972 return 0;
1973 case PN533_POLL_MOD_212KBPS_FELICA:
1974 return 1;
1975 case PN533_POLL_MOD_424KBPS_FELICA:
1976 return 2;
1977 default:
1978 return -EINVAL;
1979 }
1980}
1981
d7f3345d 1982#define PASSIVE_DATA_LEN 5
90099433 1983static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
47807d3d 1984 u8 comm_mode, u8* gb, size_t gb_len)
361f3cb7
SO		 1985{
1986 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
13003649
WR		 1987 struct sk_buff *skb;
1988 int rc, baud, skb_len;
1989 u8 *next, *arg;
1990
d7f3345d 1991 u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
361f3cb7
SO		 1992
1993 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
1994
361f3cb7
SO		 1995 if (dev->poll_mod_count) {
1996 nfc_dev_err(&dev->interface->dev,
1997 "Cannot bring the DEP link up while polling");
1998 return -EBUSY;
1999 }
2000
2001 if (dev->tgt_active_prot) {
2002 nfc_dev_err(&dev->interface->dev,
2003 "There is already an active target");
2004 return -EBUSY;
2005 }
2006
41a8ec49
SO		 2007 baud = pn533_mod_to_baud(dev);
2008 if (baud < 0) {
2009 nfc_dev_err(&dev->interface->dev,
2010 "Invalid curr modulation %d", dev->poll_mod_curr);
2011 return baud;
2012 }
2013
13003649 2014 skb_len = 3 + gb_len; /* ActPass + BR + Next */
d7f3345d 2015 if (comm_mode == NFC_COMM_PASSIVE)
13003649 2016 skb_len += PASSIVE_DATA_LEN;
d7f3345d 2017
13003649
WR		 2018 skb = pn533_alloc_skb(skb_len);
2019 if (!skb)
361f3cb7
SO		 2020 return -ENOMEM;
2021
13003649
WR		 2022 *skb_put(skb, 1) = !comm_mode; /* ActPass */
2023 *skb_put(skb, 1) = baud; /* Baud rate */
2024
2025 next = skb_put(skb, 1); /* Next */
2026 *next = 0;
361f3cb7 2027
13003649
WR		 2028 if (comm_mode == NFC_COMM_PASSIVE && baud > 0) {
2029 memcpy(skb_put(skb, PASSIVE_DATA_LEN), passive_data,
2030 PASSIVE_DATA_LEN);
2031 *next |= 1;
d7f3345d
SO		 2032 }
2033
47807d3d 2034 if (gb != NULL && gb_len > 0) {
13003649
WR		 2035 memcpy(skb_put(skb, gb_len), gb, gb_len);
2036 *next |= 4; /* We have some Gi */
361f3cb7 2037 } else {
13003649 2038 *next = 0;
361f3cb7
SO		 2039 }
2040
13003649
WR		 2041 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
2042 if (!arg) {
2043 dev_kfree_skb(skb);
2044 return -ENOMEM;
2045 }
361f3cb7 2046
13003649 2047 *arg = !comm_mode;
361f3cb7 2048
13003649
WR		 2049 rc = pn533_send_cmd_async(dev, PN533_CMD_IN_JUMP_FOR_DEP, skb,
2050 pn533_in_dep_link_up_complete, arg);
2051
2052 if (rc < 0) {
2053 dev_kfree_skb(skb);
2054 kfree(arg);
2055 }
361f3cb7
SO		 2056
2057 return rc;
2058}
2059
2060static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
2061{
6fbbdc16
SO		 2062 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
2063
2064 pn533_poll_reset_mod_list(dev);
2065
51ad304c
SO		 2066 if (dev->tgt_mode || dev->tgt_active_prot) {
2067 pn533_send_ack(dev, GFP_KERNEL);
2068 usb_kill_urb(dev->in_urb);
2069 }
2070
2071 dev->tgt_active_prot = 0;
2072 dev->tgt_mode = 0;
2073
2074 skb_queue_purge(&dev->resp_q);
361f3cb7
SO		 2075
2076 return 0;
2077}
2078
c46ee386 2079struct pn533_data_exchange_arg {
c46ee386
AAJ		 2080 data_exchange_cb_t cb;
2081 void *cb_context;
2082};
2083
6ff73fd2
SO		 2084static struct sk_buff *pn533_build_response(struct pn533 *dev)
2085{
2086 struct sk_buff *skb, *tmp, *t;
2087 unsigned int skb_len = 0, tmp_len = 0;
2088
2089 nfc_dev_dbg(&dev->interface->dev, "%s\n", __func__);
2090
2091 if (skb_queue_empty(&dev->resp_q))
2092 return NULL;
2093
2094 if (skb_queue_len(&dev->resp_q) == 1) {
2095 skb = skb_dequeue(&dev->resp_q);
2096 goto out;
2097 }
2098
2099 skb_queue_walk_safe(&dev->resp_q, tmp, t)
2100 skb_len += tmp->len;
2101
2102 nfc_dev_dbg(&dev->interface->dev, "%s total length %d\n",
2103 __func__, skb_len);
2104
2105 skb = alloc_skb(skb_len, GFP_KERNEL);
2106 if (skb == NULL)
2107 goto out;
2108
2109 skb_put(skb, skb_len);
2110
2111 skb_queue_walk_safe(&dev->resp_q, tmp, t) {
2112 memcpy(skb->data + tmp_len, tmp->data, tmp->len);
2113 tmp_len += tmp->len;
2114 }
2115
2116out:
2117 skb_queue_purge(&dev->resp_q);
2118
2119 return skb;
2120}
2121
c46ee386 2122static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
b1e666f5 2123 struct sk_buff *resp)
c46ee386
AAJ		 2124{
2125 struct pn533_data_exchange_arg *arg = _arg;
b1e666f5
WR		 2126 struct sk_buff *skb;
2127 int rc = 0;
2128 u8 status, ret, mi;
c46ee386
AAJ		 2129
2130 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2131
b1e666f5
WR		 2132 if (IS_ERR(resp)) {
2133 rc = PTR_ERR(resp);
2134 goto _error;
c46ee386
AAJ		 2135 }
2136
b1e666f5
WR		 2137 status = resp->data[0];
2138 ret = status & PN533_CMD_RET_MASK;
2139 mi = status & PN533_CMD_MI_MASK;
2140
2141 skb_pull(resp, sizeof(status));
c46ee386 2142
b1e666f5
WR		 2143 if (ret != PN533_CMD_RET_SUCCESS) {
2144 nfc_dev_err(&dev->interface->dev,
2145 "PN533 reported error %d when exchanging data",
2146 ret);
2147 rc = -EIO;
c46ee386
AAJ		 2148 goto error;
2149 }
2150
b1e666f5 2151 skb_queue_tail(&dev->resp_q, resp);
6ff73fd2 2152
b1e666f5
WR		 2153 if (mi) {
2154 dev->cmd_complete_mi_arg = arg;
6ff73fd2
SO		 2155 queue_work(dev->wq, &dev->mi_work);
2156 return -EINPROGRESS;
c46ee386
AAJ		 2157 }
2158
6ff73fd2 2159 skb = pn533_build_response(dev);
b1e666f5 2160 if (!skb)
6ff73fd2 2161 goto error;
c46ee386 2162
6ff73fd2 2163 arg->cb(arg->cb_context, skb, 0);
c46ee386
AAJ		 2164 kfree(arg);
2165 return 0;
2166
2167error:
b1e666f5
WR		 2168 dev_kfree_skb(resp);
2169_error:
6ff73fd2 2170 skb_queue_purge(&dev->resp_q);
b1e666f5 2171 arg->cb(arg->cb_context, NULL, rc);
c46ee386 2172 kfree(arg);
b1e666f5 2173 return rc;
c46ee386
AAJ		 2174}
2175
be9ae4ce
SO		 2176static int pn533_transceive(struct nfc_dev *nfc_dev,
2177 struct nfc_target *target, struct sk_buff *skb,
2178 data_exchange_cb_t cb, void *cb_context)
c46ee386
AAJ		 2179{
2180 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
b1e666f5 2181 struct pn533_data_exchange_arg *arg = NULL;
c46ee386
AAJ		 2182 int rc;
2183
2184 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2185
b1e666f5
WR		 2186 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
2187 /* TODO: Implement support to multi-part data exchange */
2188 nfc_dev_err(&dev->interface->dev,
2189 "Data length greater than the max allowed: %d",
2190 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2191 rc = -ENOSYS;
2192 goto error;
2193 }
2194
c46ee386
AAJ		 2195 if (!dev->tgt_active_prot) {
2196 nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
2197 " there is no active target");
2198 rc = -EINVAL;
2199 goto error;
2200 }
2201
b1e666f5 2202 arg = kmalloc(sizeof(*arg), GFP_KERNEL);
c46ee386
AAJ		 2203 if (!arg) {
2204 rc = -ENOMEM;
b1e666f5 2205 goto error;
c46ee386
AAJ		 2206 }
2207
c46ee386
AAJ		 2208 arg->cb = cb;
2209 arg->cb_context = cb_context;
2210
b1e666f5
WR		 2211 switch (dev->device_type) {
2212 case PN533_DEVICE_PASORI:
2213 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2214 rc = pn533_send_data_async(dev, PN533_CMD_IN_COMM_THRU,
2215 skb,
2216 pn533_data_exchange_complete,
2217 arg);
2218
2219 break;
2220 }
2221 default:
2222 *skb_push(skb, sizeof(u8)) = 1; /*TG*/
2223
2224 rc = pn533_send_data_async(dev, PN533_CMD_IN_DATA_EXCHANGE,
2225 skb, pn533_data_exchange_complete,
2226 arg);
2227
2228 break;
c46ee386
AAJ		 2229 }
2230
b1e666f5
WR		 2231 if (rc < 0) /* rc from send_async */
2232 goto error;
2233
c46ee386
AAJ		 2234 return 0;
2235
c46ee386 2236error:
b1e666f5
WR		 2237 kfree(arg);
2238 dev_kfree_skb(skb);
c46ee386
AAJ		 2239 return rc;
2240}
2241
dadb06f2 2242static int pn533_tm_send_complete(struct pn533 *dev, void *arg,
e4878823 2243 struct sk_buff *resp)
dadb06f2 2244{
e4878823 2245 u8 status;
5b412fd1 2246
dadb06f2
SO		 2247 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2248
e4878823
WR		 2249 if (IS_ERR(resp))
2250 return PTR_ERR(resp);
5b412fd1 2251
e4878823 2252 status = resp->data[0];
dadb06f2 2253
e4878823 2254 dev_kfree_skb(resp);
dadb06f2 2255
e4878823 2256 if (status != 0) {
dadb06f2
SO		 2257 nfc_tm_deactivated(dev->nfc_dev);
2258
51ad304c
SO		 2259 dev->tgt_mode = 0;
2260
dadb06f2
SO		 2261 return 0;
2262 }
2263
2264 queue_work(dev->wq, &dev->tg_work);
2265
2266 return 0;
2267}
2268
2269static int pn533_tm_send(struct nfc_dev *nfc_dev, struct sk_buff *skb)
2270{
2271 struct pn533 *dev = nfc_get_drvdata(nfc_dev);
dadb06f2
SO		 2272 int rc;
2273
2274 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2275
e4878823 2276 if (skb->len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
dadb06f2 2277 nfc_dev_err(&dev->interface->dev,
e4878823
WR		 2278 "Data length greater than the max allowed: %d",
2279 PN533_CMD_DATAEXCH_DATA_MAXLEN);
2280 return -ENOSYS;
dadb06f2
SO		 2281 }
2282
e4878823
WR		 2283 rc = pn533_send_data_async(dev, PN533_CMD_TG_SET_DATA, skb,
2284 pn533_tm_send_complete, NULL);
2285 if (rc < 0)
2286 dev_kfree_skb(skb);
dadb06f2
SO		 2287
2288 return rc;
2289}
2290
6ff73fd2
SO		 2291static void pn533_wq_mi_recv(struct work_struct *work)
2292{
2293 struct pn533 *dev = container_of(work, struct pn533, mi_work);
b1e666f5
WR		 2294
2295 struct sk_buff *skb;
6ff73fd2
SO		 2296 int rc;
2297
2298 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2299
b1e666f5
WR		 2300 skb = pn533_alloc_skb(PN533_CMD_DATAEXCH_HEAD_LEN);
2301 if (!skb)
2302 goto error;
6ff73fd2 2303
b1e666f5
WR		 2304 switch (dev->device_type) {
2305 case PN533_DEVICE_PASORI:
2306 if (dev->tgt_active_prot == NFC_PROTO_FELICA) {
2307 rc = pn533_send_cmd_direct_async(dev,
2308 PN533_CMD_IN_COMM_THRU,
2309 skb,
2310 pn533_data_exchange_complete,
2311 dev->cmd_complete_mi_arg);
6ff73fd2 2312
b1e666f5
WR		 2313 break;
2314 }
2315 default:
2316 *skb_put(skb, sizeof(u8)) = 1; /*TG*/
6ff73fd2 2317
b1e666f5
WR		 2318 rc = pn533_send_cmd_direct_async(dev,
2319 PN533_CMD_IN_DATA_EXCHANGE,
2320 skb,
2321 pn533_data_exchange_complete,
2322 dev->cmd_complete_mi_arg);
b1bb290a 2323
b1e666f5 2324 break;
6ff73fd2
SO		 2325 }
2326
b1e666f5 2327 if (rc == 0) /* success */
6ff73fd2
SO		 2328 return;
2329
b1e666f5
WR		 2330 nfc_dev_err(&dev->interface->dev,
2331 "Error %d when trying to perform data_exchange", rc);
6ff73fd2 2332
b1e666f5
WR		 2333 dev_kfree_skb(skb);
2334 kfree(dev->cmd_complete_arg);
6ff73fd2 2335
b1e666f5 2336error:
6ff73fd2 2337 pn533_send_ack(dev, GFP_KERNEL);
5d50b364 2338 queue_work(dev->wq, &dev->cmd_work);
6ff73fd2
SO		 2339}
2340
c46ee386
AAJ		 2341static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
2342 u8 cfgdata_len)
2343{
cb950d93
WR		 2344 struct sk_buff *skb;
2345 struct sk_buff *resp;
2346
2347 int skb_len;
c46ee386
AAJ		 2348
2349 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2350
cb950d93 2351 skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
c46ee386 2352
cb950d93
WR		 2353 skb = pn533_alloc_skb(skb_len);
2354 if (!skb)
2355 return -ENOMEM;
c46ee386 2356
cb950d93
WR		 2357 *skb_put(skb, sizeof(cfgitem)) = cfgitem;
2358 memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
c46ee386 2359
cb950d93
WR		 2360 resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
2361 if (IS_ERR(resp))
2362 return PTR_ERR(resp);
c46ee386 2363
cb950d93
WR		 2364 dev_kfree_skb(resp);
2365 return 0;
2366}
2367
2368static int pn533_get_firmware_version(struct pn533 *dev,
2369 struct pn533_fw_version *fv)
2370{
2371 struct sk_buff *skb;
2372 struct sk_buff *resp;
2373
2374 skb = pn533_alloc_skb(0);
2375 if (!skb)
2376 return -ENOMEM;
2377
2378 resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
2379 if (IS_ERR(resp))
2380 return PTR_ERR(resp);
2381
2382 fv->ic = resp->data[0];
2383 fv->ver = resp->data[1];
2384 fv->rev = resp->data[2];
2385 fv->support = resp->data[3];
2386
2387 dev_kfree_skb(resp);
2388 return 0;
c46ee386
AAJ		 2389}
2390
5c7b0531
SO		 2391static int pn533_fw_reset(struct pn533 *dev)
2392{
cb950d93
WR		 2393 struct sk_buff *skb;
2394 struct sk_buff *resp;
5c7b0531
SO		 2395
2396 nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
2397
cb950d93
WR		 2398 skb = pn533_alloc_skb(sizeof(u8));
2399 if (!skb)
2400 return -ENOMEM;
5c7b0531 2401
cb950d93 2402 *skb_put(skb, sizeof(u8)) = 0x1;
5c7b0531 2403
cb950d93
WR		 2404 resp = pn533_send_cmd_sync(dev, 0x18, skb);
2405 if (IS_ERR(resp))
2406 return PTR_ERR(resp);
5c7b0531 2407
cb950d93 2408 dev_kfree_skb(resp);
5c7b0531 2409
94c5c156 2410 return 0;
5c7b0531
SO		 2411}
2412
2413static struct nfc_ops pn533_nfc_ops = {
8b3fe7b5
IE		 2414 .dev_up = NULL,
2415 .dev_down = NULL,
361f3cb7
SO		 2416 .dep_link_up = pn533_dep_link_up,
2417 .dep_link_down = pn533_dep_link_down,
c46ee386
AAJ		 2418 .start_poll = pn533_start_poll,
2419 .stop_poll = pn533_stop_poll,
2420 .activate_target = pn533_activate_target,
2421 .deactivate_target = pn533_deactivate_target,
be9ae4ce 2422 .im_transceive = pn533_transceive,
dadb06f2 2423 .tm_send = pn533_tm_send,
c46ee386
AAJ		 2424};
2425
5c7b0531
SO		 2426static int pn533_setup(struct pn533 *dev)
2427{
2428 struct pn533_config_max_retries max_retries;
2429 struct pn533_config_timing timing;
2430 u8 pasori_cfg[3] = {0x08, 0x01, 0x08};
2431 int rc;
2432
2433 switch (dev->device_type) {
2434 case PN533_DEVICE_STD:
2435 max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
2436 max_retries.mx_rty_psl = 2;
2437 max_retries.mx_rty_passive_act =
2438 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2439
2440 timing.rfu = PN533_CONFIG_TIMING_102;
2441 timing.atr_res_timeout = PN533_CONFIG_TIMING_204;
2442 timing.dep_timeout = PN533_CONFIG_TIMING_409;
2443
2444 break;
2445
2446 case PN533_DEVICE_PASORI:
2447 max_retries.mx_rty_atr = 0x2;
2448 max_retries.mx_rty_psl = 0x1;
2449 max_retries.mx_rty_passive_act =
2450 PN533_CONFIG_MAX_RETRIES_NO_RETRY;
2451
2452 timing.rfu = PN533_CONFIG_TIMING_102;
2453 timing.atr_res_timeout = PN533_CONFIG_TIMING_102;
2454 timing.dep_timeout = PN533_CONFIG_TIMING_204;
2455
2456 break;
2457
2458 default:
2459 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2460 dev->device_type);
2461 return -EINVAL;
2462 }
2463
2464 rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
2465 (u8 *)&max_retries, sizeof(max_retries));
2466 if (rc) {
2467 nfc_dev_err(&dev->interface->dev,
2468 "Error on setting MAX_RETRIES config");
2469 return rc;
2470 }
2471
2472
2473 rc = pn533_set_configuration(dev, PN533_CFGITEM_TIMING,
2474 (u8 *)&timing, sizeof(timing));
2475 if (rc) {
2476 nfc_dev_err(&dev->interface->dev,
2477 "Error on setting RF timings");
2478 return rc;
2479 }
2480
2481 switch (dev->device_type) {
2482 case PN533_DEVICE_STD:
2483 break;
2484
2485 case PN533_DEVICE_PASORI:
2486 pn533_fw_reset(dev);
2487
2488 rc = pn533_set_configuration(dev, PN533_CFGITEM_PASORI,
2489 pasori_cfg, 3);
2490 if (rc) {
2491 nfc_dev_err(&dev->interface->dev,
2492 "Error while settings PASORI config");
2493 return rc;
2494 }
2495
2496 pn533_fw_reset(dev);
2497
2498 break;
2499 }
2500
2501 return 0;
2502}
2503
c46ee386
AAJ		 2504static int pn533_probe(struct usb_interface *interface,
2505 const struct usb_device_id *id)
2506{
cb950d93 2507 struct pn533_fw_version fw_ver;
c46ee386
AAJ		 2508 struct pn533 *dev;
2509 struct usb_host_interface *iface_desc;
2510 struct usb_endpoint_descriptor *endpoint;
c46ee386
AAJ		 2511 int in_endpoint = 0;
2512 int out_endpoint = 0;
2513 int rc = -ENOMEM;
2514 int i;
2515 u32 protocols;
2516
2517 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
2518 if (!dev)
2519 return -ENOMEM;
2520
2521 dev->udev = usb_get_dev(interface_to_usbdev(interface));
2522 dev->interface = interface;
0201ed03 2523 mutex_init(&dev->cmd_lock);
c46ee386
AAJ		 2524
2525 iface_desc = interface->cur_altsetting;
2526 for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
2527 endpoint = &iface_desc->endpoint[i].desc;
2528
8d25ca79 2529 if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint))
c46ee386 2530 in_endpoint = endpoint->bEndpointAddress;
c46ee386 2531
8d25ca79 2532 if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint))
c46ee386 2533 out_endpoint = endpoint->bEndpointAddress;
c46ee386
AAJ		 2534 }
2535
2536 if (!in_endpoint || !out_endpoint) {
2537 nfc_dev_err(&interface->dev, "Could not find bulk-in or"
2538 " bulk-out endpoint");
2539 rc = -ENODEV;
2540 goto error;
2541 }
2542
82dec34d 2543 dev->in_frame = kmalloc(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
c46ee386 2544 dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
82dec34d 2545 dev->out_frame = kmalloc(PN533_NORMAL_FRAME_MAX_LEN, GFP_KERNEL);
c46ee386
AAJ		 2546 dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
2547
2548 if (!dev->in_frame || !dev->out_frame ||
2549 !dev->in_urb || !dev->out_urb)
2550 goto error;
2551
2552 usb_fill_bulk_urb(dev->in_urb, dev->udev,
2553 usb_rcvbulkpipe(dev->udev, in_endpoint),
2554 NULL, 0, NULL, dev);
2555 usb_fill_bulk_urb(dev->out_urb, dev->udev,
2556 usb_sndbulkpipe(dev->udev, out_endpoint),
2557 NULL, 0,
2558 pn533_send_complete, dev);
2559
5d50b364
SO		 2560 INIT_WORK(&dev->cmd_work, pn533_wq_cmd);
2561 INIT_WORK(&dev->cmd_complete_work, pn533_wq_cmd_complete);
6ff73fd2 2562 INIT_WORK(&dev->mi_work, pn533_wq_mi_recv);
103b34cf 2563 INIT_WORK(&dev->tg_work, pn533_wq_tg_get_data);
6fbbdc16 2564 INIT_WORK(&dev->poll_work, pn533_wq_poll);
58637c9b 2565 dev->wq = alloc_ordered_workqueue("pn533", 0);
4849f85e
SO		 2566 if (dev->wq == NULL)
2567 goto error;
c46ee386 2568
6fbbdc16
SO		 2569 init_timer(&dev->listen_timer);
2570 dev->listen_timer.data = (unsigned long) dev;
2571 dev->listen_timer.function = pn533_listen_mode_timer;
2572
6ff73fd2
SO		 2573 skb_queue_head_init(&dev->resp_q);
2574
5d50b364
SO		 2575 INIT_LIST_HEAD(&dev->cmd_queue);
2576
c46ee386
AAJ		 2577 usb_set_intfdata(interface, dev);
2578
cb950d93
WR		 2579 memset(&fw_ver, 0, sizeof(fw_ver));
2580 rc = pn533_get_firmware_version(dev, &fw_ver);
2581 if (rc < 0)
4849f85e 2582 goto destroy_wq;
c46ee386 2583
cb950d93
WR		 2584 nfc_dev_info(&dev->interface->dev,
2585 "NXP PN533 firmware ver %d.%d now attached",
2586 fw_ver.ver, fw_ver.rev);
c46ee386 2587
5c7b0531
SO		 2588 dev->device_type = id->driver_info;
2589 switch (dev->device_type) {
2590 case PN533_DEVICE_STD:
2591 protocols = PN533_ALL_PROTOCOLS;
2592 break;
2593
2594 case PN533_DEVICE_PASORI:
2595 protocols = PN533_NO_TYPE_B_PROTOCOLS;
2596 break;
2597
2598 default:
2599 nfc_dev_err(&dev->interface->dev, "Unknown device type %d\n",
2600 dev->device_type);
2601 rc = -EINVAL;
2602 goto destroy_wq;
2603 }
c46ee386 2604
e8753043 2605 dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
b1bb290a 2606 PN533_FRAME_HEADER_LEN +
e8753043 2607 PN533_CMD_DATAEXCH_HEAD_LEN,
b1bb290a 2608 PN533_FRAME_TAIL_LEN);
c46ee386 2609 if (!dev->nfc_dev)
4849f85e 2610 goto destroy_wq;
c46ee386
AAJ		 2611
2612 nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
2613 nfc_set_drvdata(dev->nfc_dev, dev);
2614
2615 rc = nfc_register_device(dev->nfc_dev);
2616 if (rc)
2617 goto free_nfc_dev;
2618
5c7b0531
SO		 2619 rc = pn533_setup(dev);
2620 if (rc)
34a85bfc 2621 goto unregister_nfc_dev;
34a85bfc 2622
c46ee386
AAJ		 2623 return 0;
2624
9f2f8ba1
SO		 2625unregister_nfc_dev:
2626 nfc_unregister_device(dev->nfc_dev);
2627
c46ee386
AAJ		 2628free_nfc_dev:
2629 nfc_free_device(dev->nfc_dev);
9f2f8ba1 2630
4849f85e
SO		 2631destroy_wq:
2632 destroy_workqueue(dev->wq);
c46ee386
AAJ		 2633error:
2634 kfree(dev->in_frame);
2635 usb_free_urb(dev->in_urb);
2636 kfree(dev->out_frame);
2637 usb_free_urb(dev->out_urb);
2638 kfree(dev);
2639 return rc;
2640}
2641
2642static void pn533_disconnect(struct usb_interface *interface)
2643{
2644 struct pn533 *dev;
5d50b364 2645 struct pn533_cmd *cmd, *n;
c46ee386
AAJ		 2646
2647 dev = usb_get_intfdata(interface);
2648 usb_set_intfdata(interface, NULL);
2649
2650 nfc_unregister_device(dev->nfc_dev);
2651 nfc_free_device(dev->nfc_dev);
2652
2653 usb_kill_urb(dev->in_urb);
2654 usb_kill_urb(dev->out_urb);
2655
4849f85e 2656 destroy_workqueue(dev->wq);
c46ee386 2657
6ff73fd2
SO		 2658 skb_queue_purge(&dev->resp_q);
2659
6fbbdc16
SO		 2660 del_timer(&dev->listen_timer);
2661
5d50b364
SO		 2662 list_for_each_entry_safe(cmd, n, &dev->cmd_queue, queue) {
2663 list_del(&cmd->queue);
2664 kfree(cmd);
2665 }
2666
c46ee386
AAJ		 2667 kfree(dev->in_frame);
2668 usb_free_urb(dev->in_urb);
2669 kfree(dev->out_frame);
2670 usb_free_urb(dev->out_urb);
2671 kfree(dev);
2672
276556db 2673 nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
c46ee386
AAJ		 2674}
2675
2676static struct usb_driver pn533_driver = {
2677 .name = "pn533",
2678 .probe = pn533_probe,
2679 .disconnect = pn533_disconnect,
2680 .id_table = pn533_table,
2681};
2682
fe748483 2683module_usb_driver(pn533_driver);
c46ee386
AAJ		 2684
2685MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
2686 " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
2687MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
2688MODULE_VERSION(VERSION);
2689MODULE_LICENSE("GPL");
Linux kernel - Deliverables
This page took 0.248998 seconds and 5 git commands to generate.